Control valve for airless sprayer pressure adjustment

The technical field of

[0001] the invention claims a liquid dispensing system. Especially the invention claims a method for distributing oil painting varnish and so on without air sprayer.

Background technology

[0002] paint spraying device is known and it is widely used in the surface of the spray paint in the building structure of furniture and so on. And the air paint spraying machine because it can accurately atomization liquid paint with the ability to provide high quality of finishing coat. These without air spray painting device is normally connected to the oil paint source comprises the oil paint for suction pump delivery mechanism and comprises through the discharge oil paint of the small hole of the forming. Pump delivery mechanism is composed of the electric motor driving electric motor is operated by operator through the driving device for starting. Without air spray painting device can make liquid paint is pressed in the [ ooopsi 3 pounds-per-square-inch *** 20.7mpa ] above. Due to the high pressure spray painting device generally includes a located in the pump delivery mechanism and discharging hole between the pressure reducing valve.

[0003] normal pressure valve comprises valve seat on the strip pressing part is opened with simple valve a spring biasing. The valve can be manually actuated to starting pump-over mechanism and the operation is finished and then releasing pressure and discharge oil paint.

0004 ] and [ the air spraying device having complex of single pressure controlling device of transducer such as electronic boer deng pipe or a spring loaded pressure drive piston to activate the electric switch by on/off motor. Such as liquid conveying system which has been equipped with pressure is used for providing a visual indication of the arranged gunvor pipe. The other design is set in the middle of the cloth werner pipe or other pressure transducer the pressure exceeds threshold level automatically cut off the driving motor such as the krohn waits for people to make the graco ltd of the us patent n 0.5 292 232 described in the like. Spraying so it is cut off at the same time in the system pressure on the motor through and cut the communication balance of caused change of the system pressure is potentially and damage of the spray cover of the quality of surface paint. So as to improve the non air spraying in the spray parameters the requirement of; Especially in the memory the invention claims substantially continuously the pressure of the air without the need of sprayer does not need expensive and / or complex component and light weight it is used for hand-holding application.

The content of invention

[0005] this invention claims a method for fluid distribution device a control valve. The control valve comprises valve rod valve body cap and adjusting mechanism. The long stem valve is set with convex edge. Valve body comprises an elongated valve rod is configured on the moving flatly in the valve hole of the flow path and the flow path passes through valve hole and the valve rod passes through the flow path in. Cap is connected to valve body to receive the valve rod said flange is located in the valve body and cap between. Adjusting mechanism of cap is changed relatively to valve body so as to change the position of the cap and the flange the distance between the adjusting of the spring force so the adjusting valve open and a pressure.

Specific implementing manner

[0006] display the picture 1 which can be used the invention claims a control valve the air fluid distributing device main component of image frame.

[0007] 2 images display the picture 1 comprises the invention claims a control valve distributing device of hand type atomizer of the embodiment of the side of the perspective image.

[0008] 3 2 image displaying the image of hand-held sprayer decomposing the image display the shell body the nozzle tip assembly of the fluid pump delivery mechanism the drive element and control valve.

[0009] 4 image display the picture 3 and pump delivery mechanism driving component decomposing the image.

[0010] 5 display the image after assembling the pump delivery mechanism and drive component the section view.

[0011] picture 6 is shown for use in an 3-5 pump delivery mechanism which control valve of the sectional view.

Between 0012 ] 7a image from outside perspective image displaying the image 2-6 control valve of decomposing the image.

[0013] 7b from the image in the inner part of the perspective image displaying the image 2-6 control valve of decomposing the image.

Specific implementing manner

[0014] display the picture 1 which can be used the invention claims a control valve of portable radio the air fluid distribution device of the frame image. In the practice example showed in device 10 comprises portable there is no vacuum gas ejection gun the wireless air spray gun it comprises outer shell 12 of the nozzle tip 14 fluid container 16 18 pump delivery mechanism driving component 20 and 22 control valve. The invention claims a various embodiments of the nozzle tip 14 fluid container 16 18 pump delivery mechanism driving component 20 and 22 control valve are sealed in the portable spraying device. Such as 14 the nozzle tip fluid container 16 18 pump delivery mechanism driving component 20 and 22 of each control valve can be directly installed on the shell 12 and comprises a hand-hold device if it is related to an 2 and 3 described like. And the other embodiments in any type of spraying system can be connected with the control valve which are used 22.

[0015] 10 comprises spray gun without air distribution system the pump delivery mechanism 16 18 from the container a suction fluid and the driving force from a drive element 20 the power of the pressurized fluid used for passing through the nozzle tip assembly of atomizing 14. In different embodiment of the pump delivery mechanism comprises gear 18 pump piston pump piston pump impeller pump membrane pump rolling ball pump rotary lobe pump membrane pump or has a rack and pinion gear driving device of servo motor. In different embodiment of the drive element 20 comprises an electric motor air drive type motor linear actuator or can be used for driving the crank shaft cam plate or the swing of swinging arm in gas engine. The plurality of embodiment pump delivery mechanism 18 generated from about 360 degrees pounds-per-square-inch psi ] [ *** 2.48mpa to reach about 3 ooopsi *** 20.7mpa the hole of the injection pressure and operating pressure. The invention claims a control valve 22 allows operation of the independent of the pump delivery mechanism is composed of 18 to adjust pump delivery mechanism that is produced in the 18 pressure and flow capacity.

[0016] 2 images display the spray gun 10 the side surface of the perspective image spray gun 10 has a tip 12 of the outer shell of nozzle 14 of the fluid container 16 pump delivery mechanism 18 picture 3 driving element 20 picture 3 and control valve 22. Control valve it comprises a control rod 22 23 and 24 knob. Spray gun 10 also comprises starting device of 25 26 and battery. Nozzle tip subassembly 14 comprises protecting device of the nozzle tip 28 30 and 32 connector. Driving wu component 20 and pump delivery mechanism 18 is set on the shell 12 the. The shell 12 it comprises an integral handle and container cover 34 36 38 the battery port.

[0017] fluid container 16 to provide the expectation of the spray gun 10 in a fluid jet. Such as fluid container 16 filled through the cover 36 connector transported to the nozzle tip subassembly 14 of the paint or varnish. Battery 26 inserted into the battery port to 38 to the outer shell 12 the inner of the drive element 20 supplies electric power. Starting device of battery is connected to 25 26 and driving element 20 to the starting device 25 when starting the power input is provided to pumping mechanism 18. Pump delivery mechanism 18 from the container 16 to extract the fluid and the pressurized liquid provided to the nozzle tip subassembly 14. Connector 32 the nozzle tip subassembly 14 is connected to pump 18. Nozzle protecting device of 28 is connected to connector 32 so as to prevent touching objects from spray nozzle tip for high speed of fluid output. Nozzle tip 30 inserted through the nozzle protecting device of 28 and is connected with the 32 device in the hole and comprises receiving from pump delivery mechanism 18 the pressure of the fluid spray hole. Nozzle tip assembly 14 the invention claims the height of the atomization of a fluid flow to generate high quality of the cover surface paint. Wherein the invention claims a control valve 22 allows operation of this utility model can adopt control rod hole of the pump delivery mechanism 18 connected to the atmospheric pressure and it adopts 24 knob adjusting the maximum 10 spray gun spray pressure.

[0018] 3 image display the spray gun 10 decomposition of an ejection gun 10 has a tip 12 of the outer shell of nozzle 14 of the fluid container 16 18 pump delivery mechanism driving component 20 and 22 control valve. Spray gun 10 also comprises starting device of 25 26 battery clip 40 switch 42 44 and circuit board. Nozzle tip subassembly 14 comprises protecting device of the nozzle tip 28 30 32 and connector circular cylinder 46. 18 pump delivery mechanism comprises a suction pipe 50 48 return flow pipeline and valve 52. Driving element 20 comprises motor 54 gear transmission device swing type 56 and drive component 58. The shell 12 it comprises an integral handle and container cover 34 36 38 the battery port.

[0019] pump delivery mechanism 18 driving element 20 transmission device swing type 56 drive assembly 52 58 and valve is installed on the inner and outer shell 12 of each bracket is made of. Such as transmission device swing type 56 and drive component 58 comprises a bracket bracket 60 60 by use of fastener 64 is connected to pump delivery mechanism 18 the outer shell of 62. 52 is screwed into valve shell no62 middle and the nozzle tip 30 32 connector is screwed on the valve on 52. Nozzle tip 30 valve 52 pump delivery mechanism 18 and driving element is composed of the rib part 54 66 supported on the shell 12 the. Switch 42 located on the handle and 34 the upper part of the circuit board locating 44 34 on the handle the lower part of the starting device of 25 to accord with ergonomics the way of fixed on the shell 12 the upper. Switch 42 which is used to the driving element 20 is connected with the wire connecting terminal of the battery 26 and the circuit board is connected with the connecting method of it is composed of outer shell 12 the end port of the supporting. 26 battery can include nickel battery lithium battery lithium ion battery or any other suitable for the rechargeable battery. In an embodiment of the battery comprises battery 26 18vdc although it also can be used as the other low or high voltage battery. Fluid container 16 is screwed into the shell 12 the cover 36 middle. 48 suction pipe 50 and flow returning pipe line from the pump delivery mechanism 18 extends to the fluid in container 16. Clip 40 allows the bore 10 and conveniently loading the steps of the operator belt or on storage rack.

[0020] in order to operate the spray gun 10 fluid container 16 filled with the nozzle tip 30 the liquid jet. Starting device 25 the operator starting to start the drive element 20. Driving element 20 from a battery 26 suction caused by electrical power which is connected to transmission device of axis rotation 56. Transmission device of 56 caused by swinging drive device 58 starting motion provide it to pumping mechanism 18. Pump delivery mechanism 18 by using suction pipe 48 from the container 16 extracting liquid. Pump the air in or more than needed by the fluid flow through the control valve 22 and flow returning pipe line less return to container 16. From pump delivery mechanism of the 18 pressure fluid is provided to valve 52. Once reaches the threshold value voltage power level 52 valve is opened to allow pressurized fluid into the nozzle tip of the cylinder 30 46. Cylinder it comprises a spray hole 46 spray hole of the liquid from the nozzle tip 10 to 30 and the gun atomization and pressure fluid. Cylinder 46 can be comprised of the nozzle protecting device of 28 is removed can be disassembled and nozzle tip or can be used in the nozzle protecting device of 28 the rotation of the nozzle tip can be turned. 22 is inserted into the control valve through the access 67 flange is connected to the pump delivery mechanism 18 so as to provide i starting valve 2 to reduce pressure fast safety valve and valve 3 4 pressure adjusting valve.

[0021] 4 image display the picture 3 of the drive element 20 and pump delivery mechanism 18 decomposing the image. 18 pump delivery mechanism comprises a shell fastening piece 62 64 of the inlet valve assembly 68 outlet valve component piston 72 70 the first and second piston 74. Driving component 20 which includes drive shaft 76# first gear of the 78 a sleeve pipe 80 82 the second gear shaft 86 84# first and second sleeve pipe sleeve pipe the third 88# the third gear fourth 92 90 sleeve pipe and the fourth gear 94. Rocker type driving mechanism 58 comprises a connecting rod bearing extends 98 100 rod and sleeve 102. The first piston 72 comprises the first piston sleeve 104 and the first piston sealing element 106. 74# the second piston component includes second piston sleeve 108 and the second piston sealing element 110. 68 inlet valve comprises inlet valve cylinder 112 sealing element sealing element 114 116 118 inlet and outlet poppet valve and inlet spring 120. 70 outlet valve comprises an outlet valve cylinder 122 124 valve seat outlet poppet valve and outlet spring 126 128.

[0022] 76 driving shaft is inserted in the sleeve pipe in the 80 78 the gear the driving element 20 starting of the rotating. 86*88 sleeve pipe is inserted into the bracket the middle 60 of the receiving hole 84# middle shaft is inserted in the sleeve pipe in 86*88. Gears 82 is connected to the plates of the first end and the gear 78 gear joggled with 90 degrees with axis 84 is connected with the second end of the gear is joggled with 94. Sleeve 102 62 inserted into the outer shell of the receiving hole is 100 rod inserted in the sleeve 102 in the supporting swing type driving mechanism 58. Bearing 98 100 the rod is connected to connecting rod 96. It comprises a protruding part of the ring of the connecting rod 96 the first piston 72 are connected together. The first piston 72 and second piston 74 are respectively inserted in the piston sleeve 104*108 in the piston sleeve 104*108 installed on the outer shell of the pump cavity 62. Valve sealing element 106*110 and the piston sleeve 104*108 sealing pumping cavity. 64 inserted into the fastening piece passes through the outer shell and the sleeve 62 130 in the hole and screwed in outer shell of 60 middle. Inlet valve sleeve 62 112 inserted into the frame the receiving hole of. Inlet of the spring is 120 degrees the lifting valve 118 bias voltage of the cylinder is 112. Similar to the outlet valve cylinder 122 is inserted into the outer shell no62 middle of the receiving hole to make the outlet of the spring lifting valve 126 128 the bias voltage on the valve seat is 124. 114*116 seal prevents fluid from leaking out of the valve seat valve 68 124 prevents fluid from leaking out valve 70. Control valve 22 is inserted into the outer shell no62 middle of the receiving hole 132 from the crossing from the piston 72*74 fluid flow and gets through the ventilation opening 133. Ventilation opening 133 can be located on the outer shell the lower side of the 62 is used for connecting to the line such as the picture 3 50. 22 control valve is adjustable so as to allow the operation handle is set in pump delivery mechanism 18 generated in the maximum pressure.

[0023] 5 image displaying and driving element 20 set in the pump delivery mechanism 18 of the sectional view. Driving component 20 which is used to generate a drive shaft 76 rotating mechanism of the motor or. In the practice example showed in the drive element 20 comprises receiving from the battery 26 or another power source the electric power input of the dc direct current motor. The other in the embodiment of the drive element comprises the power source the outlet of receiving electric power input by ac alternating current motor or to receive compression air as the input of the pneumatic motor. 18 pump delivery mechanism comprises the double piston pump. The other embodiment pump delivery mechanism is comprised of 18 double row of single piston pump gear oil pump the rotor gears pump or rotary vane pump.

[0024] 78 the first gear is sleeved on the driving shaft 76 and it is composed of sleeve pipe 80 kept in proper position of. 80 sleeve pipe it adopts the fixed screw nail or other suitable device is fixed to the 76. 78 the first gear is connected to the plates the second gear meshed with 82. 84 86*88 shaft it is composed of sleeve pipe supported on the supporting stand 60 middle. 90 degrees gear is set on the shaft plates the diameter of the reducing part and uses sleeve pipe 92 fixed on the proper position of. 92 sleeve pipe it adopts the fixed screw nail or other suitable device is fixed to the 84. 90 degrees gear and gear are meshed to 94 rotating rod 100. Rod 100 is composed of the sleeve and sleeve 102 134 are respectively supported on the shell body in 62*60. Gear 78 90*94 82 the invention claims slow down from the drive element 20 provides the input of the rod of 100 to the input of the gear decelerating device.

0025 [ 100 ] rod the rotation of the through sleeve cylinder 139 the swing of the generating of spherical 138 96 connecting rod of straight-line motion. 138 ball is mechanically connected to the piston of the bearing 72 cellular 140. So the connecting rod extends at the advance position and retracted position of them into the ground start the piston 72. Piston 72 62 of the outer shell the piston in the sleeve 104 in advance and retract. When the piston 72 the advanced position and when the fluid is absorbed into valve 68. 68 valve comprises a rod 48 142 suction pipe connected with the rod 142. 48 suction pipe is dipped in the fluid container 16 picture 3 the liquid in the inner. Around the valve through the inlet and 118 146 the absorbing liquid into pump cavity in 144. 118 poppet valve is composed of spring 120 bias voltage on the valve cylinder is 112. 116 seal prevents fluid from the lifting valve is closed 118 112 of the cylinder and lifting valve through the 118. Sealing element 114 prevent the fluid 112 of the cylinder and outer shell through the 62. Through the piston is 72 to generate the attractive force of valve rod 118 attracted far away from cylinder 112. When the piston 72 during advancing of pump cavity 144 in the fluid through outlet valve is pushed to 70 148.

[0026] 144 in the cavity of pressurizing for the fluid around valve 70 of the lifting valve 126 is pushed into the pressure cavity in 150. Poppet valve is composed of spring 126 128 bias voltage on the valve seat is 124. Valve seat 124 prevent the fluid in the valve is closed 126 the lifting valve 126 and the outer shell through the 62. When the spring 120 and the piston is 72 pressure generated by the closing valve 68 the lifting valve 126 72 the piston moves to push the position is pushed away from the outer shell of 62. From pumping cavity 144 by pressurized fluid filling pressure is 150 comprises a sleeve 62 122 and the outer shell the space between the pumping and filling cavity 152. Pressure fluid and the piston 74 push at retracted position. Through piston 72 forward shifting of the volume is small piston displacement 74. So the piston 72 the single stroke provide enough current is filled with pumping cavity 152 and maintaining pressure is 150 filling pressure fluid. The external piston 72 has enough bulk to push the pressurized fluid through the outer shell the outlet of 62 154.

[0027] when the piston 72 back to the additional fluid suction pump delivery chamber 144 in the piston is composed by connecting rod 74 96 the forward impellent. 74 of the piston is set on the outer shell the piston in the sleeve 62 108 inner cylinder and piston sealing element 110 so as to prevent the pressurized fluid overflows from the pump cavity 152. 74 front of the piston so as to discharge the piston is 72 is pushed into the pump cavity the fluid in the 152. Fluid is pushed into the pressure is 150 to 62 through the outer shell the outlet of the 70 154 only by the valve preventing inlet cavity 148. 72 the piston and piston 74 is different from each other place operation. To the display the specific embodiment of the piston and piston 74 72*180 of heterogeneous 74 so that when the piston is located at the most advanced position part when the piston 72 located at the maximum retracted position. The heterogeneous operating under the condition of the piston 72*74 synchronous operation so as to continuously pressurized fluid to flow pressure is 150 at the same time it also reduces the spray gun the vibration of 10. Pressure is 150 some program is used as the energy accumulator and more of the continuity of the pressure fluid flow this invention claims to the outlet port 154 so as to the continuous liquid provided to 52 valve and nozzle tip subassembly 14 picture 3. 62 of the outer shell of the received picture 4 132 hole extending through the pressure is 150. Control valve 22 is inserted into the receiving hole 132 and is configured to the pressure is 150 by pump delivery mechanism 18 generated by the pressure exceeded it is composed of control valve 22 is set with a threshold value level or the manual starting time and automatically open.

[0028] picture 6 is shown for use in an 3-5 pump delivery mechanism which control valve of 18 to 22 of the sectional view. 22 control valve comprises a shell 202 plunger piston the spring cap 204 206 208 210 ball gasket 212 213 # tower 0 annular sealing element and baffle ring 214 215. 202 main body comprises a base portion 216 cup 218 of the spring hole 219 inlet hole 220 rod hole 221 outlet hole 222 main body and screw thread 224. Plunger 204 comprises a flange 228 with a conductive coating 229a 229 the rod of the sealing seat 230 ball guiding element 232 and control rod hole 234. 208 cap comprises cap screw thread of the outer sleeve tube 235 236 the tooth-shaped gear ring 238 limited valve hole 242 of the inner sleeve and end wall 244 240.

[0029] by using the body through screw thread ring 202 224 valve body is screwed into shell 62 of the receiving hole 132 image in the through pressure chamber 5 150 image. Inlet hole 220 fluidly connected to the pressure is 150 and therefore exposed to the 18th pump-over mechanism generated by the fluid pressure. 222 outlet hole extending through the main body the 62 202 and the outer shell of air inlet of the ventilation opening 133 aligned so as to receive extends to the fluid container 16 picture 3 in the return flow pipeline 50 picture 3. So the fluid container 16 suction pipe 48 pump delivery mechanism 18 pressure is 150 22 the pressure reducing valve and flow returning pipe line 50 is formed between the complete loop.

[0030] plunger 204 218 cup through the inserting rod hole 221 to make flange 228 is set on the spring hole 219 and it extends through the 229 rod passes through the cup 218. Of the spring hole 219 comprises 221 of the screw hole with larger diameter of extending part. 213 # tower on the outer shell main body and 202 62 is set between the inlet hole in the 220. 212 cushion ring is pushed into the inlet hole in the 220 maintains 213 # tower 210 of the valve body and ball 202 in the assembling. When the control valve 22 is completely when assembling 204 plunger piston the ball guide the ball holding 232 210 against the 213 # tower so as to prevent from 150 pressure cavity of the fluid passing through the opening hole 220 and enter into the outlet hole 222. O-shaped ring sealing member 214 202 on the main body and plunger 204 located between the sealing base 230 in order to prevent 222 hole the fluid in the plunger piston from 213 # tower 204 and when the entering hole 219. Comprises an opening gasket ring or the retainer ring 215 around valve rod locating 229 so as to prevent the o-shaped ring 214 squeezed into the screw hole in 221. 206 spring is located in the hole 219 in order to push the flange and cap the upper 228 208. 208 cap the outer sleeve 236 # 235 on the cap screw thread is screwed into the hole on the cup 218 219 to make 229 rod extends to the inner sleeve 240 in and runs through the end wall 244. 208 cap comprising a spring fixing device spring fixing device of the spring 206 is in compression state to the plunger 204 to 213 # tower and the outer shell 62. Following wen the discussed like knob 24 and control rod on the picture 2 23 7a 7b and shown in the valve rod through the upper sliding 229. Knob 24 are connected with the tooth shape 238 gear ring and the control rod 23 is connected to the control rod hole 234.

[0031] 22 valve in pump delivery mechanism 18 the invention claims starting device of. The starting of spray gun 10 the new use of the fluid which has been filling pump delivery mechanism before need to be in the 18 pressure can be collected before the spray gun 10 is removing air. Through pin bolt in the hole 234 is connected with the rod 204 the control bar of picture 1 23; 7a 7b to the image can be composed of the operator to push or pull is composed of the 252 and the surface of the cam action of the piston which is far away from the base 212 retracted caused by the ball separating from 213 # tower 210. The pump delivery mechanism 18 starting time from 10 spray gun in the air from the container 16 to replace the fluid and through the ventilation opening of the spray gun 133 10 discharging. At the same time when the fluid from the beginning of container 16 when the flow control valve 22 and the fluid again circulating return to container 16. When the release control the valve rod 23 52 the picture 3 at the proper of the fluid pressure the lower opening in order to keep at the nozzle tip 14 of the fluid pressure constant.

[0032] 22 valve the invention also claims a method for the use after quickly the pressure spray gun device 10. Such as a spray gun 10 on the driving component 20 which has been stopped operation pump delivery mechanism of 18 to operate when the pressure fluid is kept in the spray gun 10 is. And the expected to be 10 pressure spray gun can be disassembled and washing spray gun 10. So the control rod 23 with the displacement of the valve opening 22 and the pump delivery mechanism in the pressurized fluid container 16 to discharge and release spray gun 10 in any stored in the potential energy.

[0033] 22 valve which is used to prevent the pumping mechanism 18 is changed into the pressure safe valve of. According to the spring 206 to the load setting plunger piston 204 the pressure is 150 in the pressure reaches to the expected threshold level the mobile. On the horizontal position of pressure is 150 fluidly connected to the hole so as to allow 222 150 pressure cavity the liquid move to the ventilation opening in 133. Because of the liquid return to container 16 and it can be composed of the pump delivery mechanism 18 recycling.

[0034] especially this utility model claims a response also allows valve is used for transporting to the nozzle tip 14 the injection pressure control device of. The valve cap 22 208 comprises allowing the spring 206 in the compressor caused by the change of the adjusting mechanism so as to change can be composed of the pump delivery mechanism 18 generated by the maximum pressure. In the practice example showed in the outer sleeve 236 on the cap screw thread cup 218 235 is connected with the inner screw thread on so as to allow 208 cap to rotate so as to adjust the relative to the basal part and flange 216 228 the position of. The other embodiment can be used as the other several such as the two is set between the adjusting spring 206 of the compression of the double state the button mechanism. In an embodiment 22 valve can be configured in the i ooopsi *** 6.9mpa and 3 ooopsi *** 20.7mpa between any of the pressure is opened. In the description in the embodiment of the knob 24 picture 1; 7a 7b image to be adjusted in the cup 218 to rotate in the outer sleeve 236 so as to adjust the spring compression.

[0035] 7a image from outside perspective image displaying the image 2-6 control valve of decomposing the image 22. 7b from the image in the inner part of the perspective image displaying the image 2-6 control valve of decomposing the image 22. At the same time image and discussion 7a 7b. 22 control valve comprises a main body plunger piston spring 202 room 204 206 cap 208 210 ball gasket 212 213 # tower 0 annular sealing element and baffle ring 214 215. 202 main body comprises a base portion 216 cup 218 of the spring hole 219 inlet hole 220 outlet hole 222 main body and screw thread 224. Plunger 204 comprises a flange 228 229 rod the sealing seat 230 and control rod hole 234. 208 cap comprises cap screw thread of the outer sleeve tube 235 236 the tooth-shaped gear ring 238 limited valve hole 242 of the inner sleeve and end wall 244 240. Knob it comprises 24 end face of the 252 254 rod hole the gear ring 256 soft finger 258 and dial are 260. Dial 260 comprises handle and indicator 264 262. 202 valve body comprises a facet 266.

[0036] 208 cap the outer sleeve 236 is screwed into valve body the cup in 218 202. Knob 24 through the key groove is connected with the cap 208 is connected to the key groove is connected with the allowing relative axial movement of it is not only prevent the relative rotary motion of. Specifically 252 end face of the gear ring and cap 256 208 of the tooth-shaped gear ring 238 sliding engagement. So the knob 24 is locked into the helmet 208 circumferential joint. 256 the ring and gear ring 238 joint under the condition of the soft finger 258 is pushed passes through the cup 218 the facet 266 is. Soft finger 258 outwards in radial direction the ground and deflects so as to close to the facet 266 the radial direction of the outer circumference of. But sufficient to the acting force can be used to overcome the soft finger 258 of the acting force to make the finger 258 circumferentially rotate beyond the surface of the cap 208 266 or from the axial direction removing the knob floor 24. Specifically soft finger 258 may be located along the facet 266 a plurality of pre-set position in the text such as discussed like. Knob 24 the axial motion of the pin is composed of 270 and control rod 23 and the holding force limiting.

[0037] soft finger 258 claims 208 cap the position of the touch instruction of the operator can evenly the increment mobile knob 24. The display the embodiment of the facet 266 comprising hexagonal cross section area 6 the invention claims a flat surface and six edges of the soft finger 258 jointed at the edge of the. Specifically soft finger 258 to the inner surface including a shape is formed the joint of the facet 266 of the edge of saw tooth shape object. In the practice example showed in the soft finger 8 258 # 16 comprises a plurality of saw tooth shape of the said finger between the additional space eight this generates soft finger 258 relative to the surface of the total 24 266 a plurality of positions. It in the embodiment of the knob 24 is limited the rotating of 270 degree so as to supply 18 adjusting so as to provide 19 plurality of positions. Indicator 264 to operator this invention claims hat 208 relatively to valve body 202 the position of a visual indication of. Indicator can be set on the shell 12 picture 1 is to provide the position of the knob 24 or pressure or flow rate of intuitively express.

[0038] 256 the ring and gear ring seat can completely 238 under the condition of the protruding part 268 in the shoulder resists the end part of the cup 218 to control rod 23 of the actuator provides the body base. 206 spring is compressed the flange 228 and end wall between the 244 210 the ball is pushed into the inlet hole in the 213 # tower of 220. 229 valve rod extends through the cap 208 242 on the valve hole and knob hole 24 is 254 and the pin 270 is used to control rod 23 is fixed on the hole are 234. Knob 24 the dial 260 the soft finger 258 separated so as to allow the outer shell 12 the received visit flange 67 picture 3 is inserted in the middle so as to provide the sealing.

[0039] said cap 208 of the outer sleeve 236 can be rotate in order to regulate the outer screw thread the cup 235 218 of the inner screw thread the joint. 208 cap is screwed off so that the end wall far away from 244 flange 228 # and 216 the base part so as to release spring the compression 206. Dial 260 through the gear ring and ring 238 256 of the tooth shape of the joint of the operator is easy to be rotating cap 208. Specifically dial 260 comprises handle 262 so as to make it can easily turning button 24 such as the wet when. When knob 24 rotating so as to make the cap is screwed on the cup 208 completely 218 206 when the spring is compressed to the maximum horizontal. So the pressure is 150 is necessary to produce larger amount of pressure control valve to open 22. When knob 24 rotating so as to make the cup cap 208 218 completely shrinks 206 when the spring is compressed to the minimum horizontal. So the pressure is 150 is necessary to produce a little pressure control valve to open 22. The pressure cavity of 150 is generated in the bigger than the spring 206 generated by the acting force of any pressure to the ball far away from 210 tower 213 the arched middle part of fluid through the ventilation opening 133 and enter into the return flow pipeline 50 and fluid container 16. So it is from 10 spray gun sprayer is lower than it is composed of control valve 22 determining a threshold level the lower part of the can be continuously but not interrupting. The minimum level is more of the fluid to be recycled to container 16 then it keeps the maximum horizontal for any given of the strip pressing part.

[0040] although it has been reference an exemplary embodiments describe the invention but the field of technology of people will know at the deviation scope of this invention under the condition that it can carry out various changes and the same material can be used for replacing the components. It does not deviate from the essential of this invention the range of the condition that it can carry out various changed so as to make the special condition or material suitable for the invention claims a teaching. Such as the other way knob 24 can be elastically kept so it to adjust and control valve 24 of the people to offer tactile feedback and help the knob 24 against accidentally of relocation comprises providing the spraying of outer shell 12 interaction component. The same as the knob cap 208 24 and of the fan shaped concave opening are working so that the knob 24 to transfer rotation of the cap 208. These parts between the radial direction can be connected to replace the shaft direction characteristic such as pin and socket; Matching with the pin block and reverse gear locking claw; Matched with the radiation of the facet; And. So the purpose of this invention is not limited to the specific embodiment of the invention comprises drop into the accompanying claim of the protective range of the embodiment.