Compressing diaphragm pump having automatic air expelling and pressure abnormality-preventing features for spray use

The present invention relates to a pressure feed diaphragm pump provided in a pressurized water type cleaning device used for spraying, which does not generate pressure abnormality during operation, can constantly and stably pressurize water, and is particularly effective in promoting the spray cleaning effect. ..

As shown in FIG. 1, a conventional pressurized cleaning device that injects and washes a vehicle on the market today includes a water sprayer 1, a portable tank 2, and a pumping diaphragm pump 10. As a feature of the pump, a small pumping diaphragm pump 10 can be put in the portable tank 2 so that it can be moved outdoors and injected into the vehicle to wash the vehicle, and the power source is the DC 24 volt inside the vehicle. In addition to being able to be taken from a cigarette lighter, there is the point that water can be conveniently used anywhere to supply water to the portable tank 2. In order to operate such a conventional pumping diaphragm pump 10 via a water intake pipe 3 and a water inlet 61 on the upper lid 60 of the pumping diaphragm pump 10, tap water W is first poured into the portable tank 2 and the operation is performed. After converting this tap water into pressurized water in the tank, the water is sent to the water sprayer 1 via the water outlet pipe 4 for use in spraying. Therefore, the function of the pumping diaphragm pump 10 mainly affects the operation of such a cleaning device and the stability of the pressure of the output water.

However, there are two drawbacks to the operating procedure of these conventional cleaning devices: A. Residual air bubbles: Some of the pumping diaphragm pumps 10 that when water is depleted and replenished by pouring water into the portable tank 2 Bubbles remain in the parts, especially in the intake pipe 3. During the next operation, the residual air is mixed with water to form bubbles, which enter the operating parts of the pumping diaphragm pump 10, especially the upper lid 60, and the overall function, that is, the vibration and water pressure of the parts become unstable intermittently. As a result, if the device is operated for a long period of time, an unreasonable load is applied to the entire device and the product life is shortened. Therefore, how to release the residual bubbles mixed in the water during the replenishment of water becomes a serious problem for such a device.

B. Abnormal pressure: The phenomenon of abnormal pressure occurs as the operating time of the pumping diaphragm pump 10 becomes longer and the frequency of use increases. In order to clarify the cause of the pressure abnormality, it is necessary to understand the structure and operating function of each component of the pumping diaphragm pump 10 as follows:

As shown in FIGS. 2 to 6, in the conventional pumping diaphragm pump 10, the motor 11 and a plurality of screws are arranged along the tip of the output shaft (not shown) of the motor 11 and the outer rim thereof. An upper lid chassis 12 having a hole 13 formed therein, a diaphragm 20 covering the upper lid chassis 12, a piston valve 30 fitted into the diaphragm 20, and three piston slices 50 each of which are closely fixed to the piston valve 30. It is provided with a plastic backflow prevention plastic gasket 40 to be attached and an upper lid 60 having a plurality of perforations 63 formed on its outer rim, and a plurality of swing wheels 14 are pivotally driven on the upper lid chassis 12. Meaning The output shaft of the motor 11 reciprocates and swings in the axial direction to perform a pumping action. The entire pumping diaphragm pump 10 is fully integrated (as shown in FIG. 4) by passing the bolt 5 through all of the corresponding screw holes 13 of the top lid chassis 12 and the perforations 63 of the top lid 60.

Regarding the diaphragm 20, a gasket groove 21 is formed along the top peripheral rim of the diaphragm 20, and an eccentric piston pusher 23 is superposed on each of the three convex protrusions 22, and the protrusions 22 are shaken by the above three swings. It is arranged on the driving wheel 14 in correspondence with it. By penetrating each screw 24 through the perforations 221 of the convex protrusions 22 and the perforations 231 of the piston pushers 23, respectively, the piston pushers 23 and the convex protrusions 22 are swayed together with the diaphragm 20. It is securely screwed onto the driving wheel 14 (as shown in FIG. 4), whereby all of these components are constantly displaced (as shown by the dashed line in FIG. 4) and simultaneously axially reciprocated. Try to do dynamic movements.

Further, as shown in FIGS. 2 and 4 to 6, the piston valve 30 mainly has a hemispherical water discharge base 31 in which the central region thereof is embedded upward toward the upper lid 60, and the water discharge base 31. Below, there are three water inlets 35, which are arranged at equal intervals of 120 degrees from each other. There, the water discharge base 31 is composed of a positioning hole 32 formed at the center thereof and a groove 33 branched into three branches at equal intervals of 120 degrees from each other in the radial direction, thereby separating the three. The zone is formed by molding a plurality of spouts 34 between the grooves; the water inlet 35 is composed of a positioning hole 36 and a plurality of water inlet slots 37. The backflow prevention plastic gasket 40 is integrally molded with a soft elastic material into a hollow hemisphere. The gasket 40 includes a positioning stem 41 that extends downward at the center and each of them at an equal interval of 120 degrees. In addition to the three rib panels 42 separated in the radial direction, the three protruding panels 43 extending to the outside of the gasket are provided. By fixing the positioning stem 41 to the corresponding positioning hole 32 and at the same time inserting each protruding panel 43 into the separation groove 33 in the corresponding water discharge base 31, each of the three separate zones of the water discharge base 31 can be inserted. The entire spout slot 34 is completely shut off by sealing the periphery with a backflow prevention plastic gasket 40 (as shown in FIG. 4). Each of the piston slices 50 has a rigid central positioning stem 51 formed upward, and the slice is integrated with a soft elastic material into a reverse flare shape having a convex arched outer surface and a concave curved inner surface. Mold. By inserting the positioning stem 51 into the corresponding positioning holes 36 at the inlet 35, all the inlet slots 37 are sealed at the periphery by the piston slice 50 (as shown in FIGS. 4 and 5). And completely shut off;

As further shown in FIGS. 1 and 2 to 4, the upper lid 60 having a plurality of perforations 63 formed in the peripheral rim mainly has an inlet orifice 61 at the outer edge and an internal outlet orifice 62 therein. It is provided with a water outlet 64 at the top of the center having a water outlet 64 and an external pressure switch container 65 coupled to the water outlet 64 for mounting a pressure switch P currently on the market. There, the ramp groove 66 is configured on its bottom side, its peripheral rim closely surrounding the piston valve 30 and securely aligned with and fixed to the gasket groove 21 of the diaphragm 20; central annular groove 67. Is configured downward inside the ramp groove 66 to match and closely attach to the water discharge base 31 of the piston valve 30, thereby providing a pressurizing chamber 7 (as shown in FIG. 4) between the two. create.

Please refer to Fig. 1, Fig. 7 and Fig. 8 for the actual operation. By the axial reciprocating swing motion of the piston pusher 23 driven by the swing wheel 14, water W is sent to the water inlet orifice 61 of the upper lid 60 from the portable tank 2 through the intake pipe 3 (as shown by the arrow in FIG. 7). This is done by alternately loading the suction force and push output of the pumping action: when the piston pusher 23 swings downward and separates from the piston slice 50, the piston slice 50 also moves downward at the same time. It is pulled by the suction force to separate it from the inlet 35, and guides the water W through the inlet orifice 61 and the inlet slot 37 (as indicated by the respective arrows in FIG. 7) into the low pressure chamber 6 in sequence, and the low pressure is provided. First, the water W is pressurized in the chamber 6 to make the medium pressure water W; when the piston pusher 23 swings upward toward the piston slice 50, the piston slice 50 is also pushed upward at the same time by the push output. Toward the water inlet 35, the water W of the low pressure chamber 6 is extruded into the pressure chamber 7 through the spout 34 (as indicated by the respective arrows in FIG. 8), and then water in the pressure chamber 7. Pressurize W to make high-pressure water W; by alternately repeating the suction force and push output by the pumping action in this way, the pressure of water W in the pressurizing chamber 7 is raised to 80 psi to 100 psi, and the pressure is increased to 80 psi to 100 psi. Pass through the internal drainage orifice 62 and water outlet 64 on the top lid 60, and the water outlet pipe 4 connected to it in this order, and use it for actual injection and cleaning, or perform other necessary tasks compatible with the water sprayer 1. ..

However, in the design of the backflow prevention plastic gasket 40, there is a serious drawback that causes an unfavorable effect when the pumping diaphragm pump 10 is operated. As described in the previous description and shown in FIG. 5, the backflow prevention plastic gasket 40 is integrally molded with a soft elastic material into a hollow hemisphere, which is used to cover all of the spout 34 of the piston valve 30. Although it is covered, the interlocking of the water inlet 35 and the piston slice 50, which is related to this, causes the piston pusher 23 to reciprocate and swing in the axial direction, alternating the suction force and the push output to drive the pump action with a finite displacement. I'm going. Since the material has a flexible and uneven hemispherical shape, not only the water discharge effect is reduced by the limited dislocation due to the pumping action, but also the sealing effect by the suction action becomes insufficient. Thereby, the amount and pressure of output water are reduced. The undesired and incomplete sealing effect of the backflow prevention plastic gasket 40 is exacerbated by the increased deformation δ over time of the material, resulting in the pressure anomaly problem (as shown in FIG. 6). ..

In order to solve the above pressure abnormality problem due to the deformation of the backflow prevention plastic gasket 40, the inventor of the present invention improved the design of the gasket, registered a patent application, and filed a patent application with the United States Patent Office on October 26, 2005. It was officially recorded as Application No. 11 / 258,027 (Publication No. US2006 / 0090642). As shown in FIGS. 9-12, in the improved pumping diaphragm pump 10 structure, both the backflow prevention plastic gasket 40 and the associated spout 71 were changed from the original hemispherical shape to a planar shape. In the piston valve 70, in order to adjust the spout 71 in this way, a positioning mass 72 having a positioning hole 73 is formed in the center of the spout 71; each zone has a plurality of spouts 74 3 The two separated zones are formed at equal intervals with an inclination angle of 120 ° around the positioning mass 72. On the peripheral rim for the corresponding three separate zones, three inlets 75 are arranged, respectively, under the outlet 71, with a central positioning hole 76 and a plurality of inlet slots 77 at the inlet 75. .. In addition, the backflow prevention plastic gasket 80 is formed as a flat three-valve blade shape to completely cover the spout 71, and three radial cuts 81 are equally spaced from each other at an inclination angle of 120 °. , Thereby ensuring that each valve blade accurately contacts and closes the spout 74 of the corresponding spout 71; in the center of the backflow prevention plastic gasket 80, a positioning opening 82 below the opening. It is made with a positioning rim 83 (as shown in FIG. 10).

For actual assembly, as further shown in FIGS. 10 and 11, by aligning the clutch rim 83 of the backflow prevention plastic gasket 80, the positioning opening 82 is first made into the positioning mass 72 of the piston valve 70. After fitting, the backflow prevention plastic gasket 80 and the piston valve 70 are firmly integrated by inserting the T-shaped positioning stem 90 into the positioning hole 73 of the piston valve 70.

See Figure 12. Not only was the "pressure anomaly" problem significantly improved, but the associated deformation was alleviated even after long-term trial use of the modified piston valve 70 and anti-reflux plastic gasket 80. However, during the trial use, new challenges were found: A. The piston valve 70 and the backflow prevention plastic gasket 80 were connected by a T-shaped positioning stem 90 and integrated, but this came loose. B. The strength of the valve blade has become slightly weaker. C. Piston slice 50 is still slightly deformed due to aging. Therefore, the inventor of the present invention is constantly conducting research and research for the purpose of improving the function of the pumping diaphragm pump 10 described above and solving the problems that still exist.

A main object of the present invention is to provide a "pressure-feeding diaphragm pump for spraying, which has a feature of automatically releasing air to prevent pressure abnormality", and in the diaphragm pump, a hollow tubular exhaust assembly is provided. It is connected to the wall of the water outlet on the top lid, and the exhaust assembly includes the plunger body and the compression springs arranged therein, as well as the air flow path and the exhaust assembly drilled in the wall of the water outlet. It has an exhaust orifice drilled to connect with (plunger body) on the upper surface of the center of the compression spring; when air is completely mixed in the pressurized water, the repulsive force of the compression spring becomes larger than the water pressure of the pressurized water. The repulsive force pushes the plunger baffle of the plunger body forward into the first exhaust cylinder, whereby the through pores enter the first exhaust cylinder. As a result, the air mixed in the pressurized water enters the air flow path, passes through the plunger opening of the plunger body through the through pores, and is finally discharged from the upper lid through the exhaust orifice of the exhaust assembly. In this way, not only can the air mixed in the water be released stably and automatically by constantly adjusting the water pressure, but also the internal components can be simplified, the operation can be performed smoothly, and the product life can be extended.

Another object of the present invention is to provide a "pressure feed diaphragm pump for spraying having a feature of automatically releasing air to prevent pressure abnormality", and the upper surface of the spout is centered on the positioning hole. Design the recess so that it is the lowest point, and design the bottom surface of each of the three water inlets to be the recess that is curved upward so that the center of the positioning hole is the lowest point. After assembly, a gap was created between the bottom of the anti-reflux plastic gasket and the recess that warped below the spout; similarly, the gap was warped above the flat top of the piston slice and above the entry slot. Create between the recesses. The above-mentioned gap not only significantly increases the suction force of each of the backflow prevention plastic gasket and the piston slice in the pumping action related to the axial swing motion of the piston pusher, but also can greatly promote the pressurizing effect on water. Moreover, for both the anti-reflux plastic gasket and the piston slice, the strength of the anti-reflux plastic gasket of the prior art of the design with uniform thickness is due to the special design that the thickness of the center is thicker than the thickness of the edge. Therefore, when compared with the same thickness, not only is it higher, but also the sealing effect on the spout hole and the water inlet slot during switching of the opening and closing operation can be improved; thereby, the problem of "abnormal pressure" can be completely eliminated.

As shown in FIGS. 13 and 14, in the first embodiment of the "pressure feed diaphragm pump for spray having a feature of automatically releasing air and preventing pressure abnormality" of the present invention: Exhaust assembly 100. The assembly is a hollow pipe connected to the wall of the water outlet 64 on the top lid 60 of the pressure feed diaphragm pump 10 for spraying, and the pair of the first exhaust cylinder 101 and the second exhaust cylinder 102 are connected to each other. The first exhaust cylinder 101 has a diameter larger than that of the second exhaust cylinder 102, and is arranged at the upper part and the lower part, respectively, to allow both cylinders to freely move with each other. Was drilled in the wall between the first exhaust cylinder 101 and the water outlet 64 of the top lid 60, and the exhaust orifice 104 was drilled in the center of the upper surface of the exhaust assembly 100 toward the second exhaust cylinder 102. The exhaust assembly 100 and the plunger body 200 are hollow pipes in which the tip opening 201 of the plunger and the baffle 202 at the bottom of the plunger have the outer diameter of the plunger opening 201 smaller than the outer diameter of the plunger baffle 202. In addition to the compression spring 203 arranged inward from the plunger opening 201 and the through-pore 204 formed in the vicinity of the plunger baffle 202 on the plunger wall, the plunger body 200 has the same. The plunger body 200, which has an O-ring gasket 205 provided around the plunger body between the through pores 204 and the plunger baffle 202, is provided, and both the plunger opening 201 and the plunger baffle 202 are exhausted. It is fitted and inserted into the second exhaust cylinder 102 and the first exhaust cylinder 101 of the three-dimensional 100, respectively.

See FIGS. 15 and 16. When no air is mixed in the pressurized water W'of the pressurizing chamber 7 of the upper lid 60, the pressurized water W'passing through the water outlet 64 makes the air flow path 103 into the first exhaust cylinder 101 of the exhaust assembly 100. As it flows in, the plunger baffle 202 of the plunger body 200 is pushed backward, whereby the entire plunger body 200 is pushed into the second exhaust cylinder 102 by the water pressure of the pressurized water W'which is larger than the repulsive force of the compression spring 203. Is done. Meanwhile, the through-pores 204 of the plunger body 200 are also completely inserted into the second exhaust cylinder 102 (as shown by the arrows in FIG. 15), which causes the O-ring gasket 205 to watertightly block the second exhaust cylinder 102. All the pressurized water W'in the first exhaust cylinder 101 is directed out of the spout 64; in this operation mode, the water is pumped and discharged normally. When air is mixed in the pressurized water W', the repulsive force of the compression spring 203 becomes larger than the water pressure of the pressurized water W', so that the repulsive force of the compression spring 203 pushes the plunger baffle 202 of the plunger body 200 forward. , Put it in the first exhaust cylinder 101, so that the through pores 204 enter the first exhaust cylinder 101. As a result, the air mixed in the pressurized water W'passes through the air flow path 103 (as shown by the broken line arrow in FIG. 16) and enters the first exhaust cylinder 101, and then passes through the through pores 204 of the plunger body 200. It passes through the plunger opening 201 and is finally discharged from the top lid 60 through the exhaust orifice 104 of the exhaust assembly 100; thus providing an air discharge function. The spray pressure feed diaphragm pump 10 repeats the normal pressurized operation state until all the air is wiped out of the top lid 60, and the plunger body 200 of the exhaust assembly 100 (as shown in FIG. 15). It returns to the normal pressurized water discharge position again.

As further shown in FIGS. 17 and 18, in the second exemplary embodiment of the present invention, the "pressure feed diaphragm pump for spraying having the feature of automatically discharging air and the feature of adjusting pressure", the exhaust assembly The design of both the 100 and the top lid 60 has been changed, and instead of keeping them permanently connected to each other, the mounting connector 300 has been modified so that it can be attached and detached. (As shown in FIG. 17), the bottom of the exhaust assembly 100 is communicated with a stepped hole 301 for connecting to the first exhaust cylinder 101 via an air flow path 302 in the connector 300. At the same time, a threaded union 303 is formed at each end of the connector 300 to ensure that the water outlet 64 and the water outlet pipe 4 of the upper lid 60 are screwed to each other (as shown in FIG. 18). In this way, the exhaust assembly 100 can obtain the same air release and pressure adjusting effects as in the first embodiment.

As further shown in FIGS. 19 to 22, in the third exemplary embodiment of the present invention, "a pressure feed diaphragm pump for spray having a feature of automatically releasing air and a feature of adjusting pressure", a spout 401 The top surface of the three inlets 404 (as shown in FIG. 21) is designed to be a recess 407 that is curved downward so that the center of the positioning hole 402 is the lowest point, and the bottom surface of each of the three water inlets 404 (as shown in FIG. 21). ), Design the recess 408 that is curved upward so that the center of the positioning hole 405 is the lowest point. In order to adjust the mechanism of the spout 401, the backflow prevention plastic gasket 500 is made convex with the upper surface arched upward and the bottom surface is flattened, and the central thickness t1 is made thicker than the edge thickness t2. (As shown in cross section along line aa in FIGS. 20 and 21), design and integrally mold both the backflow prevention plastic gasket 500 and the downwardly projecting center positioning stem 501 with the same soft elastic material; In order to adjust the mechanism of the water inlet 404, each of the three piston slices 600 also had a convex shape with an arched bottom surface and a flat top surface (in the cross section along the bb line in FIGS. 20 and 21). Design the center thickness t3 to be greater than the edge thickness t4 (as shown).

After assembling as shown in FIGS. 22 to 24, the gap G1 (as shown in FIG. 22) is exposed to the bottom surface of the backflow prevention plastic gasket 500 and the spout. Created between the downwardly curved recess 407 of the 401; similarly, the gap G2 (as shown in FIG. 22) with the flat top surface of the piston slice 600 and the upwardly curved recess 408 of the entry slot 406. Create during. The gaps G1 and G2 not only significantly increase the suction force of each of the backflow prevention plastic gasket 500 and the piston slice 600 in the pumping action associated with the axial swinging motion of the piston pusher 23, but also have a pressurizing effect on water. It can be greatly promoted; in addition, due to the special design of the non-uniform thickness t1 and t2 of the anti-reflux plastic gasket 500 and the t3 and t4 of the piston slice 600, its strength, the backflow of the prior art of the design of uniform thickness. Not only is it higher than the strength of the preventive plastic gasket 80 when compared at the same thickness, but it also has a sealing effect on the spout hole 403 and the water inlet slot 406 (as shown in FIGS. 23 and 24) while switching the opening / closing operation. Can also be improved; thereby completely eliminating the pressure anomaly problem; and the integrally molded component of the backflow prevention plastic gasket 500 not only speeds up the assembly process, but also saves manufacturing costs.

<figref num="1">It is explanatory drawing of the conventional pressure cleaning apparatus.</figref><figref num="2">It is an exploded perspective view of the conventional pressure feed diaphragm pump for sprays.</figref><figref num="3">It is a perspective view which shows the upper lid of the conventional pressure feed diaphragm pump for sprays.</figref><figref num="4">It is sectional drawing along the AA line of FIG.</figref><figref num="5">It is a perspective explanatory view which shows the piston valve of the conventional pressure feed diaphragm pump for sprays.</figref><figref num="6">It is a perspective explanatory view which shows the deformation of the backflow prevention plastic gasket of the conventional pressure feed diaphragm pump for sprays.</figref><figref num="7">It is 1st explanatory drawing which shows the operation of the conventional pressure feed diaphragm pump for sprays.</figref><figref num="8">It is a 2nd explanatory drawing which shows the operation of the conventional pressure feed diaphragm pump for sprays.</figref><figref num="9">It is a perspective view which shows another piston valve and the backflow prevention plastic gasket of the conventional pressure feed diaphragm pump for sprays.</figref><figref num="10">FIG. 5 is a cross-sectional explanatory view showing a disassembled version of FIG. 9 in a plan view.</figref><figref num="11">It is sectional drawing which shows the assembled thing of FIG. 10 in a plane.</figref><figref num="12">It is sectional drawing which shows the assembly of the conventional pressure feed diaphragm pump for sprays in a plane.</figref><figref num="13">It is a perspective explanatory drawing of the 1st Example of this invention.</figref><figref num="14">It is sectional drawing which follows the BB line of FIG.</figref><figref num="15">It is 1st explanatory drawing which shows the operation of 1st Example Example of this invention.</figref><figref num="16">It is 2nd explanatory drawing which shows the operation of 1st Example Example of this invention.</figref><figref num="17">It is sectional drawing which shows the disassembled part of the 2nd exemplary Example of this invention in plan view.</figref><figref num="18">It is sectional drawing which shows the assembled 2nd exemplary Example of this invention in plan.</figref><figref num="19">FIG. 1 is an exploded perspective view of a third exemplary embodiment of the present invention.</figref><figref num="20">FIG. 2 is an exploded perspective view of a piston valve according to a third exemplary embodiment of the present invention.</figref><figref num="21">It is sectional drawing which shows the disassembled piston valve of the 3rd Example Example of this invention in plan.</figref><figref num="22">It is sectional drawing which shows the assembled piston valve of the 3rd Example Example of this invention in plan.</figref><figref num="23">It is 1st explanatory drawing which shows the operation of 3rd Example Example of this invention.</figref><figref num="24">It is 2nd explanatory drawing which shows the operation of the 3rd Example Example of this invention.</figref>

Code description

1 Water sprayer 2 Portable tank 3 Intake pipe 4 Water outlet pipe 5 volt 6 Low pressure chamber 7 Pressurized chamber 10 Pumping diaphragm pump 11 motor 12 Top lid chassis 13 screw holes 14 Driving wheel 20 diaphragm 21 Gasket groove 22 Convex protrusion 23 Piston pusher 31 spout base 32, 36 Positioning hole 34 spout spout 35, 75, 404 inlet 37, 406 Water inlet slot 40, 80, 500 Backflow Prevention Plastic Gasket 41, 51, 90, 501 stems 42 rib panel 43 protruding panel 50, 600 piston slice 60 Top lid 61 Water inlet orifice 62 Izumi orifice 63, 221, 231 Perforations 64 Water outlet 65 External pressure switch container 70 piston valve 71, 401 spout 72 Positioning mass 73, 402, 405 Positioning holes 74, 403 spout holes 81 Break 82 Positioning opening 83 Positioning rim 100 exhaust assembly 101 1st exhaust cylinder 102 2nd exhaust cylinder 103, 302 Air flow path 104 Exhaust orifice 200 Plunger body 201 Plunger opening 202 Plunger Baffle 203 spring 204 Penetrating pores 205 O-ring gasket 300 mounting connector 301 stepped hole 303 Union with screws 407, 408 recess