Gas pressure regulator

0001The invention relates to a gas pressure regulator according to the preamble of claim 1.

0002Such a gas pressure regulator is known from DE 198 54 301 C2. Here, in a single housing two control stages added. If downstream in the gas pressure regulator Gas appliance or in a supply line to the gas appliance a Leakage occurs, will continue to be supplied from the gas pressure regulator gas, exiting through the leak. Such gas outlet should be avoided for safety reasons.

0003According to the prior art are further gas shortage safety devices known. This is a special stage gas pressure regulator with a significant Waste of acting at the output gas pressure automatically locks, so that the output is no more gas can escape. The Gas deficiency safety device can by manual operation an adjusting means provided thereon are opened again. It is usually downstream at some distance from one attached to a liquefied gas cylinder gas pressure regulator switched into the supply line. As a result, it undesirably happen that due to a leak in the the gas pressure regulator to the gas shortage safety device connecting portion of the supply line gas leaks. Apart from this, the preparation and installation of a Gas pressure regulator and a separate gas deficiency safety device consuming.

0004Object of the invention is to overcome the disadvantages of the prior art eliminate. In particular, a safety improved gas pressure regulator be specified, the possible simple to manufacture and can be mounted.

0005This object is solved by the features of claim 1. Useful embodiments result from the features of claims 2 to ninth

0006According to the invention it is provided that the second Control stage a gas shortage safety device with a manually having actuatable locking means, by means of which at a pressure drop in the second control level below a predetermined Minimum breakthrough automatically lockable such is that a normal operation only after manual actuation the actuating means is possible. - By the second control stage has a gas shortage safety device, eliminates the need for a separate gas deficiency safety device with a gas pressure regulator by means of a connecting line. It can no longer be an undesirable Gas outlet between the gas shortage safety device and the gas pressure regulator to come. The proposed gas pressure regulator is easy to manufacture and assemble.

0007According to an advantageous embodiment, the second control level a first at its end with a movable Operating diaphragm mounted valve lever for operating a Closure element on for closing the breakthrough. The Closure element is advantageously pivotable about a first pivot axis at the second end of the valve lever attached. Furthermore, the closure element may be in a housing on mounted bearing pivotable about a second pivot axis be held. After a further design feature is a housing extending from the support in the movement the valve lever between the first end and the first Pivot bearing mounted. A gas pressure regulator with the aforementioned Features can be relatively simple and inexpensive manufacture. In an undesirable pressure drop in the second control stage, this means the gas shortage safety device securely and reliably closed.

0008After a further design feature is the breakthrough in a first separating from the second control stage caseback provided and the support extends from the housing floor in the second control stage. The proposed design enables a compact structure of the gas pressure regulator.

0009Advantageously, the closure element against the Tension of a spring to close the breakthrough pivotable. This allows an uncomplicated control mode.

0010The actuating means may comprise a from the outside of the housing have her operated pin which at one of the gas-bearing Pressure control chamber remote from the operating diaphragm attached is. Further, a locking device can be provided be, with the case of a shutdown due to a gas shortage the valve lever can be locked in a position in which The breakthrough is closed, and the locking can be released by actuation of the pin. When the locking device may involve a conventional locking device act with which, for example, the pin in a certain position is maintained once it reaches them. In this position, the pin can for example clamped are held or locked.

0011An exemplary embodiment of the invention is based the drawing explained. Show it:<dl tsize="6"><dt>Fig. 1</dt><dd>is a schematic sectional view of a gas pressure regulator in a first functional state,</dd><dt>FIG. 2</dt><dd>is a schematic sectional view of the gas pressure regulator according to FIG. 1 in a second functional state and</dd><dt>Fig. 3</dt><dd>is a schematic sectional view of the gas pressure regulator according to FIG. 1 in a third functional state.</dd></dl>

0012The gas pressure regulator shown in FIGS. 1 to 3 are in a housing 1 arranged a first R1 and a downstream thereof second control stage R2 taken. The first control stage R1 comprises a first control diaphragm 2 with a first Stel Dissolve 3, in which a pivotably mounted first valve levers 4 with one end engages. At another end the first valve lever 4 is a first closure element 5 provided that such. B. as sealing a first rubber washer may include. The first closure element 5 closes in here shown closed state a one inlet connection 6 downstream first breakthrough. 7

0013A second control stage is R2 by a housing bottom 8 of the first control stage R1 separated. A provided in the housing base 8 second opening 9 may - as shown here - be formed by a nozzle. A second valve lever 10 is moved with its first end in a second at a Operating diaphragm 11 mounted second Stel release 12 added. A second closure element 13 is in the range of a second End of the second valve lever 10 is mounted. The second closure element 13 is pivotable about a first pivot axis S1 attached to the second valve lever. 13 Further, the second Shutter member 13 pivotally mounted on a second pivot axis S2 held which on the housing 1, preferably the housing bottom 8, is attached. The second closure element 13 has a lever, on which the two pivot axes S1, S2 are attached. The lever connects a closure body pivotally connected to the valve lever 10. The first pivot axis S1 is relative to the housing 1 is movable, namely pivotable about the second pivot axis S2, whereas the second pivot axis S2 is fixed relative to the housing. 1 For tight sealing the second breakthrough 9, the second shutter member 13, especially the closure body, a seal, eg. B. a second rubber disc 14 that. From caseback 8 extends a support 15 into the path of the second Valve lever 10. The support 15 is between the first Pivot axis S1 and the first end of the second valve lever 10.

0014At a gas-pressurized chamber the side facing away from the second control diaphragm 11 is a pin 16 on a rear side Second Stel release 12 fixedly. The pin 16 is in a conventional locking out 17 and includes at its end located outside the housing 1 a Gripping piece 18. A leading away from the second control stage R2 Outlet connection is indicated by the reference mark 19th With the reference numeral 20 is a spring, which is supported on the case back 8 and the second closure element 13 forces in an open position.

0015Fig. 1 shows a first functional state of the gas pressure regulator. Here prevail in the first R1 and the second regulating stage R2 each overpressure. The first closing element 5 closes the first opening 7. The second closing element 13 closes the second breakthrough. 9

0016Fig. 2 shows the functional state with a decrease of the Pressure in the second control stage R2. It is characterized conditionally to a movement of the second control diaphragm 11 toward the Housing floor 8. The second rocker arm 10 is rotated around the second Pivot axis S2 pivots. The spring 20 presses the second Closure element 13 releasing in a second opening 9 Position. As a result, the pressure in the first Usually ex-R1. The first control diaphragm 2 moves in Direction of the housing bottom 8 and the first valve lever 4 is is pivoted such that the first closure element 5 to the first Breakthrough 7 releases.

0017Fig. 3 shows the functional state at a pressure drop in the second control stage R2 below a predetermined minimum value. In this case, the second operating diaphragm moves 11 in the direction of the housing bottom 8. The second valve levers 10 is on against the support 15 and is pivoted about. As a result, returns the pivotal movement of the second closure element 13 about the second pivot axis S2 around. The second closure element 13 against the force of the spring 20 about the pivot axes S1 and S2 in a the Breakthrough forced 9 position closing. Here comes the pin 16 within the locking device 17 to a position, in which it is locked. In the in Fig. 3 shown functional state is closed, the second breakthrough. 9 A control by the first R1 and second R2 regulating stage is no longer possible in this state. Only by a manual operation, namely a lifting of Gripping member 18 the locking of the pin 16 may be lifted and the second control diaphragm 11 is moved to a position be, which again is a control by the second Control stage R2 allows.

0018With the proposed gas pressure regulator is in a high level reached safety.

LIST OF REFERENCE NUMBERS

0019<dl tsize="2" compact="compact"><dt>1</dt><dd>housing</dd><dt>2</dt><dd>first operating diaphragm</dd><dt>3</dt><dd>first Stel release</dd><dt>4</dt><dd>first valve levers</dd><dt>5</dt><dd>first closure element</dd><dt>6</dt><dd>inlet connection</dd><dt>7</dt><dd>first breakthrough</dd><dt>8th</dt><dd>caseback</dd><dt>9</dt><dd>second breakthrough</dd><dt>10</dt><dd>second valve levers</dd><dt>11</dt><dd>second operating diaphragm</dd><dt>12</dt><dd>second Stel release</dd><dt>13</dt><dd>second shutter members</dd><dt>14</dt><dd>rubber washer</dd><dt>15</dt><dd>In stock</dd><dt>16</dt><dd>pen</dd><dt>17</dt><dd>locking</dd><dt>18</dt><dd>gripping piece</dd><dt>19</dt><dd>outlet connection</dd><dt>20</dt><dd>feather</dd></dl><dl tsize="2" compact="compact"><dt>R1</dt><dd>first control stage</dd><dt>R2</dt><dd>second regulation stage</dd><dt>S1</dt><dd>first pivot axis</dd><dt>S2</dt><dd>second pivot axis</dd></dl>