JP5102384B2 - Diaphragm pressure regulator - Google Patents

Description

  The present invention relates to a diaphragm type pressure regulator.

The diaphragm type pressure regulator adjusts the opening of the regulating valve by adjusting the opening of the regulating valve according to the movement of the diaphragm that partitions the pressure regulating chamber arranged in the regulator body and the atmospheric pressure chamber during normal use. The gas pressure in the adjustment chamber is kept within the set range.
Further, for example, there is known a structure in which an shutoff valve for shutting off the inlet passage is provided in addition to the regulating valve for regulating the gas pressure in the pressure regulating chamber in the inlet passage leading to the pressure regulating chamber (for example, Patent Document 1).
In the diaphragm type pressure regulator disclosed in Patent Document 1, as shown in FIG. 12, a diaphragm 160 that partitions and forms a vertical pressure regulating chamber 112 and an atmospheric pressure chamber 151 disposed in the regulator main body 101. A connecting body 170 is disposed at the center of the.
Further, a suspended body 175 having a permanent magnet 178 fixed to the upper end portion is disposed on the lower surface of the connection body 170 so as to be able to contact and separate.
The suspended body 175 is moved and guided in the vertical direction while being positioned by the positioning guide member 100.
Further, a spring 179 is disposed around the axis of the suspended body 175 between the flange 175a and the positioning guide member 100.
In addition, an operating lever 180 is provided between the extended end 103 of the connecting rod 102 having the inner and outer valve rubbers 130 and 140 and the suspended body 175, which is actuated as the suspended body 175 moves up and down. The
When the gas pressure in the inlet passage 114 leading to the pressure regulation chamber 112 becomes smaller than the set range, or when the gas pressure in the outlet passage 121 leading to the pressure regulation chamber 112 becomes larger than the set range. The entrance path is blocked by rubber 140.

Chinese Utility Model Registration Bulletin, No. ZL20000820029976.1

By the way, in the diaphragm type pressure regulator having the above-described structure, if the inner and outer valve rubbers 130 and 140 are displaced and fixed on the shaft of the connecting rod 102, the opening failure and the blocking failure are likely to occur. Therefore, the inner and outer two valve rubbers 130 and 140 need to be accurately fixed and disposed.
Further, the connecting rod 102 having the two inner and outer valve rubbers 130 and 140 is assembled to the inlet passage 114 leading to the pressure adjusting chamber 112 of the regulator main body 101, and the extended end 103 of the connecting rod 102 is assembled to the operating lever 180. It must be done, and its assembly becomes troublesome.

  In view of the above problems, an object of the present invention is a diaphragm pressure adjustment that can easily assemble a regulating valve and a shut-off valve in an inlet passage of a gas flow path and can prevent a shut-off failure of the shut-off valve. Is to provide a vessel.

In order to solve the above-mentioned problems, a diaphragm type pressure regulator according to claim 1 of the present invention includes a pressure regulating chamber having a gas inlet path and an outlet path in communication with each other in the regulator main body, and an atmosphere. A diaphragm is formed to partition the communicating atmospheric pressure chamber,
A connecting body is disposed at the center of the diaphragm, and a suspended body can be contacted and separated in the vertical direction on the lower surface of the connecting body through a permanent magnet that is attracted by a biasing force of a separating spring. Arranged,
In the inlet passage, a regulating valve that adjusts the gas pressure in the pressure regulating chamber and a shut-off valve that shuts off the inlet passage are individually disposed,
The adjusting valve is connected to an operating lever that is operated in accordance with an elevating operation of the suspended body,
The shut-off valve is held in the open position by the urging force of the return spring, and closes against the urging force of the return spring by receiving a gas flow pressure with respect to the inlet passage when the adjustment valve is fully opened. It is characterized by being set to.

According to the above configuration, the regulating valve and the shutoff valve are separated from each other, and the regulating valve is connected to the operating lever that is operated in accordance with the lifting and lowering operation of the suspended body, and the shutoff valve is opened by the biasing force of the return spring. The adjustment valve and the shut-off valve can be easily assembled to the inlet passage of the gas flow path so as to hold the position.
Also, during normal use, the diaphragm movement is transmitted to the operating lever via the connection body, permanent magnet, and suspension body, which adjusts the opening of the regulating valve, thereby setting the gas pressure in the pressure regulation chamber. Kept in range.
When the gas pressure in the inlet passage leading to the pressure adjusting chamber becomes smaller than the set range, the suspension body is lowered together with the connection body together with the permanent magnet attracted to the connection body to the lower end position by the diaphragm. The adjusting valve is arranged at the fully open position by the operating lever interlocked therewith.
Then, in response to the flow pressure of the gas flowing into the inlet passage, the shut-off valve is arranged at the fully closed position against the biasing force of the return spring, thereby shutting off the inlet passage.
When the gas pressure in the outlet passage leading to the pressure adjusting chamber becomes larger than the set range, the connection body is raised against the attractive force of the permanent magnet of the suspended body by the diaphragm.
On the other hand, the adjustment valve is disposed at the fully open position via the operation lever by the suspension body being lowered to the lower end position by the urging force of the separation spring.
Then, the shutoff valve is disposed at the fully closed position against the biasing force of the return spring in response to the flow pressure of the gas flowing into the inlet passage, and shuts off the inlet passage, thereby preventing the shutoff failure of the shutoff valve. it can.

The diaphragm type pressure regulator according to claim 2 is the diaphragm type pressure regulator according to claim 1,
The permanent magnet has an outer diameter smaller than the upper surface of the suspended body and is fixed to the upper surface of the suspended body without protruding from the outer periphery of the suspended body,
The separating spring is formed by a compression coil spring having one end wound around the outer peripheral surface of the diaphragm connection body and fixed, and the other end wound around the outer peripheral surface of the suspension body. Has a function to guide the suspended body up and down.

  According to the said structure, the spring for separation exhibits the function to raise / lower a suspension body. As a result, a dedicated guide member for raising and lowering the suspended body can be manufactured, and the labor for assembling in the pressure adjustment chamber can be saved, and the number of parts and the number of assembling steps can be reduced by this amount, thereby reducing the cost. Great effect.

It is a longitudinal cross-sectional view which shows the diaphragm type pressure regulator which concerns on Example 1 of this invention. It is a perspective view which similarly shows an adjustment valve. It is a perspective view which similarly shows a cutoff valve. Similarly, in normal use, it is a longitudinal sectional view showing a state in which the gas pressure in the pressure adjustment chamber is maintained within a set range by adjusting the opening amount of the adjustment valve by the movement of the diaphragm. Similarly, when the gas pressure in the pressure adjustment chamber becomes smaller than the set range, it is a longitudinal sectional view showing a state in which the adjustment valve is disposed at the fully open position. Similarly, the regulating valve is disposed at the fully open position, and the shutoff valve is disposed at the fully closed position against the urging force of the return spring by the flow pressure of the gas flowing in from the inlet passage side. Similarly, it is a longitudinal cross-sectional view showing a state where the operation lever is lifted together with the diaphragm by the operation shaft, the adjustment valve is arranged at the fully closed position, and the shutoff valve is arranged at the open position to be reset. Similarly, when the gas pressure in the pressure adjusting chamber becomes larger than the set range, the diaphragm is lifted away from the permanent magnet of the suspended body by the diaphragm. Similarly, while the connection body is lifted away from the permanent magnet of the suspension body, the suspension body is lowered to the lower end position by the separation spring, and the adjustment valve is disposed at the fully open position. Similarly, the regulating valve is disposed at the fully open position, and the shutoff valve is disposed at the fully closed position against the urging force of the return spring by the flow pressure of the gas flowing in from the inlet passage side. Similarly, the gas pressure in the pressure adjusting chamber is smaller than the set range, and the connection body is attracted to the permanent magnet of the suspended body at the lower end position by the diaphragm. It is a longitudinal cross-sectional view which shows the conventional diaphragm type pressure regulator.

  A mode for carrying out the present invention will be described in accordance with an embodiment.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, in a regulator main body 1 that forms the main body of a diaphragm pressure regulator, a diaphragm that forms a pressure regulating chamber (pressure regulating chamber) 11 and an atmospheric pressure chamber 51 that communicates with the atmosphere. 60 is disposed.
In the first embodiment, the adjuster main body 1 includes a case body 10 and a cover body 50 attached to the case body 10 with the peripheral edge of the diaphragm 60 interposed therebetween. A pressure adjusting chamber 11 is formed on the case body 10 side, and an atmospheric pressure chamber 51 is formed on the cover body 50 side.

At one end of the case body 10, an inlet-side connector 12 having an inlet passage 13 leading to the upstream side of the pressure adjustment chamber 11 is attached. A nozzle portion 15 having a nozzle hole 16 at the center and a spring chamber 18 communicating with the upstream side of the nozzle portion 15 are formed adjacent to each other at an intermediate portion of the inlet passage 13 of the inlet side connector 12. Yes. A first valve seat 17 for the adjustment valve 30 is formed at the tip of the nozzle portion 15, and a second valve seat 19 having a tapered hole shape for the shut-off valve 40 is formed at the upstream opening of the spring chamber 18. Has been.
Further, an outlet side connection portion 20 having an outlet passage 21 that communicates with the downstream side of the pressure adjustment chamber 11 is integrally extended to the other end portion of the case body 10.

A regulating valve 30 that regulates the gas pressure in the pressure regulating chamber 11 is disposed on the downstream side in the inlet passage 13 of the inlet side connector 12.
As shown in FIGS. 1 and 2, the adjustment valve 30 includes a valve main body 31, a valve portion 32, and a connection portion 33. A plurality of gas grooves 31 a that allow the passage of gas are formed in the outer peripheral surface of the valve body 31 in the axial direction.
The valve portion 32 is made of an elastic material such as rubber or resin, is attached to one end portion of the valve main body 31, and faces the first valve seat 17 so as to be able to contact and separate.
The connection part 33 protrudes from the other end part of the valve main body 31, and is connected to the operating lever 80 mentioned later.

As shown in FIG. 1, a shutoff valve 40 that shuts off the inlet passage 13 is disposed on the upstream side in the inlet passage 13 of the inlet side connector 12, and the inlet passage located further upstream than the shutoff valve 40. A filter 14 is disposed in the vicinity of the opening 13.
As shown in FIGS. 1 and 3, the shutoff valve 40 includes a valve body 41, a rib body 42, a valve portion 44, and a tip shaft portion 45.
The valve body 41 is formed in a paper shaft shape having a large diameter at one end (upstream side of the inlet passage 13) and a small diameter at the other end (downstream side of the inlet passage 13). An annular groove 43 is formed on the outer peripheral surface of the large diameter portion. The tip shaft portion 45 projects from the end surface of the small diameter portion toward and away from the valve portion 32 of the regulating valve 30.
The rib body 42 extends from one end portion of the valve body 41 toward the upstream side of the inlet passage 13 and is formed in a cross-sectional cross so as not to obstruct gas inflow from the opening portion of the inlet passage 13. Has been.
The valve portion 44 is formed by an O-ring made of an elastic material such as rubber or resin, and is fitted into the annular groove 43 of the valve main body 41 and attached.
The shutoff valve 40 is held in the open position by the biasing force of the return spring 46 incorporated between the small diameter portion of the valve body 41 and the spring chamber 18.
Further, the shutoff valve 40 receives the gas flow pressure at the end face of the large-diameter portion of the valve body 41 of the shutoff valve 40 and the return spring 46 is attached when the gas flow pressure from the gas supply source exceeds a set value. The valve is moved to a closed position against the force (that is, a position where the valve portion 44 of the shutoff valve 40 is in close contact with the second valve seat 19).

On the other hand, as shown in FIG. 1, a cylindrical tube portion 50 a that opens upward is projected from the upper central portion of the cover body 50. A lid member 55 is attached to the cylinder portion 50a.
A disc-shaped upper support plate 61 is disposed on the upper surface of the diaphragm 60, and a spring receiving projecting ring portion 62 is formed on the upper support plate 61.
A pressurizing spring 65 made of a compression coil spring is disposed between the inner surface (lower surface) of the lid member 55 and the spring receiving protrusion 62 of the upper support plate 61.

A connection body 70 is disposed near the center of the diaphragm 60.
The connection body 70 is formed of a ferromagnetic material such as iron, and has a small-diameter shaft portion 71 and a large-diameter flange portion 72 on the same center line at the upper and lower portions.
Further, the shaft portion 71 of the connecting body 70 protrudes into the atmospheric pressure chamber 51 through the central portion of the diaphragm 60 and the central portion of the upper support plate 61.
A sandwiching body 73 is disposed on the upper surface of the center portion of the upper support plate 61. Then, the lower portion of the operation shaft 90 inserted through the central portion of the lid member 55 from above the lid member 55 is screwed into the central portion of the shaft portion 71 through the sandwiching body 73, thereby connecting the diaphragm 60 to the diaphragm 60. The body 70 and the operation shaft 90 are connected to each other.
A knob 91 for pulling up the connection body 70 together with the operation shaft 90 is formed on the upper surface of the operation shaft 90 that protrudes from the upper surface of the lid member 55.
A cap member 92 is detachably mounted on the upper surface of the lid member 55 so as to cover the upper side of the knob 91 of the operation shaft 90.

A suspended body 75 is arranged on the lower surface of the flange portion 72 of the connection body 70 so as to be able to contact and separate in the vertical direction via a permanent magnet 78 that is attracted against the urging force of the separation spring 79.
The suspended body 75 has a flange portion 77 having substantially the same diameter as the flange portion 72 of the connection body 70 and a small-diameter shaft portion 76 at the upper and lower portions, and the upper surface of the flange portion 77 does not protrude from the outer periphery thereof. Thus, the permanent magnet 78 is fixed.
In the first embodiment, the permanent magnet 78 is formed in an annular shape having a center hole 78a, and the tightening screw 95 is screwed into the flange portion 77 from above the permanent magnet 78 through the center hole 78a. The permanent magnet 78 is fastened and fixed.
In the first embodiment, the separation spring 79 has one end wound around the outer peripheral surface of the flange portion 72 of the connection body 70 and fixed, and the other end is fixed to the outer peripheral surface of the flange portion 77 of the suspended body 75. It is formed by a compression coil spring that is wound and fixed. The separation spring 79 has a function of guiding the suspended body 75 up and down in the vertical direction.

Between the shaft portion 76 of the suspended body 75 and the adjustment valve 30, an operation lever 80 that transmits the lifting / lowering operation of the suspended body 75 to the adjustment valve 30 is disposed.
The lower part of the operation lever 80 near one end is assembled to the inner surface near one end of the case body 10 so as to be rotatable about the support pin 81.
An interlocking portion 83 cut into a curved shape is formed at one end of the operating lever 80, and this interlocking portion 83 is movably engaged with an interlocking pin 82 disposed on the connection portion 33 of the regulating valve 30. Is done.
The other end of the operating lever 80 is extended to a position where it is inserted into the bifurcated portion of the shaft portion 76 of the suspended body 75, and a curved cut-out interlocking portion 85 is formed below the extended end. The interlocking portion 85 is movably engaged with an interlocking pin 86 disposed at the bifurcated portion of the shaft portion 76 of the suspended body 75.

The diaphragm type pressure regulator according to the first embodiment is configured as described above.
Therefore, during normal use, as shown in FIG. 4, the movement of the diaphragm 60 based on the pressure difference between the pressure adjusting chamber 11 and the atmospheric pressure chamber 51 passes through the connecting body 70, the permanent magnet 78, and the suspended body 75. Is transmitted to the operating lever 80. Then, the opening amount of the adjustment valve 30 is adjusted by the movement of the operation lever 80 around the support pin 81 as the rotation center. Thus, the gas pressure in the pressure adjustment chamber 11 is maintained within the set range by adjusting the amount of gas flowing into the pressure adjustment chamber 11.

When the gas pressure in the inlet passage 13 leading to the pressure adjusting chamber 11 becomes smaller than the set range, the diaphragm 60 is pushed down by the elastic force of the pressurizing spring 65 as shown in FIG. Together with the body 70, the suspended body 75 is lowered to the lower end position integrally with the permanent magnet 78 attracted to the connection body 70. The adjusting valve 30 is arranged at the fully open position by the operating lever 80 interlocking with this.
Then, as shown in FIG. 6, the shutoff valve 40 is disposed at the fully closed position against the biasing force of the return spring 46 by the flow pressure of the gas flowing in from the inlet passage 13 side. As a result, the inlet passage 13 is blocked and the supply of gas is stopped.
Note that when the gas supply is stopped, the gas appliance connected to the outlet passage 21 becomes unusable, so the user of the gas appliance contacts the gas supplier.

  When the diaphragm pressure regulator is reset so that the gas appliance can be used, the operating shaft 90 is pulled up as shown in FIG. 7 after removing the cap member 92. As a result, the adjustment valve 30 is switched to the fully closed position via the operation lever 80. Further, the shutoff valve 40 is disposed at the original open position by the biasing force of the return spring 46.

Next, in a state where the gas appliance is not used, foreign matter is unexpectedly sandwiched between the first valve seat 17 of the nozzle portion 15 and the valve portion 32 of the adjustment valve 30, and the adjustment valve 30 is slightly opened. Then, the gas pressure in the pressure adjusting chamber 11 becomes larger than the set range.
When the gas pressure in the outlet passage 21 leading to the pressure adjusting chamber 11 becomes larger than the set range, first, the diaphragm 60 rises to the rising end position against the urging force of the pressurizing spring 65 as shown in FIG. To do. Then, the connecting body 70 rises together with the diaphragm 60 against the attractive force of the permanent magnet 78 of the suspended body 75, and the connected body 70 and the permanent magnet 78 of the suspended body 75 are separated from each other.
Then, as shown in FIG. 9, the suspension body 75 is lowered to the lower end position by the urging force of the separation spring 79. The adjusting valve 30 is arranged at the fully open position by the operating lever 80 interlocking with this.
Then, as shown in FIG. 10, the shutoff valve 40 is disposed at the fully closed position against the urging force of the return spring 46 by the flow pressure of the gas flowing in from the inlet passage 13 side, and shuts off the inlet passage 13.

As shown in FIG. 10, when the gas appliance is used in a state where the inlet passage 13 is blocked by the shutoff valve 40, the gas pressure in the pressure adjusting chamber 11 becomes smaller than the set range, and the gas appliance becomes unusable. Then, as shown in FIG. 11, the connecting body 70 is lowered to the lower end position together with the diaphragm 60 by the urging force of the pressurizing spring 65.
As a result, the connection body 70 is attracted to the permanent magnet 78 of the suspended body 75 at the lower end position.
Further, when the diaphragm pressure regulator is reset so that the gas appliance can be used, as described above, after removing the cap member 92, as shown in FIG. Is switched to the fully closed position, and the shut-off valve 40 is placed in the original open position by the biasing force of the return spring 46.

  As described above, the regulating valve 30 that regulates the gas pressure in the pressure regulating chamber 11 of the regulator body 1 and the shut-off valve 40 that shuts off the inlet passage 13 are separated from each other. The shut-off valve 40 is connected to the actuating lever 80 that is actuated in accordance with the lifting and lowering operation, and the shut-off valve 40 is held in the open position by the urging force of the return spring 46 so that the shut-off valve 40 and the shut-off valve 40 Can be easily assembled, and the shutoff failure of the shutoff valve 40 can be prevented.

In the first embodiment, the permanent magnet 78 has an outer diameter smaller than the upper surface of the flange portion 77 of the suspended body 75 and is fixed to the upper surface of the flange portion 77 without protruding from the outer periphery of the flange portion 77.
Further, one end of the separating spring 79 is fixed by being wound around the outer peripheral surface of the flange portion 72 of the connection body 70 of the diaphragm 60, and the other end is fixed by being wound around the outer peripheral surface of the flange portion 77 of the suspended body 75. Formed by a compressed coil spring. As a result, the separating spring 79 exhibits a function of guiding the suspended body 75 up and down.
For this reason, it is possible to produce a dedicated guide member for guiding the suspended body 75 to be raised and lowered, and to save the trouble of assembling it in the pressure adjusting chamber 11, and to reduce the number of parts and the number of assembling steps accordingly. Great effect for cost reduction.

  In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can implement with a various form.

DESCRIPTION OF SYMBOLS 1 Adjuster body 11 Pressure adjustment chamber 13 Inlet path 21 Outlet path 30 Adjustment valve 40 Shut-off valve 46 Return spring 51 Atmospheric pressure chamber 60 Diaphragm 65 Pressurizing spring 70 Connection body 75 Suspension body 77 Flange part 79 Release spring 80 Actuation lever 90 Operation shaft 92 Cap member

Claims (2)

In the regulator body, there is disposed a diaphragm that partitions and forms a pressure regulation chamber having a gas inlet path and an outlet path in communication with each other and an atmospheric pressure chamber communicating with the atmosphere.
A connecting body is disposed at the center of the diaphragm, and a suspended body can be contacted and separated in the vertical direction on the lower surface of the connecting body through a permanent magnet that is attracted by a biasing force of a separating spring. Arranged,
In the inlet passage, a regulating valve that adjusts the gas pressure in the pressure regulating chamber and a shut-off valve that shuts off the inlet passage are individually disposed,
The adjusting valve is connected to an operating lever that is operated in accordance with an elevating operation of the suspended body,
The shut-off valve is held in the open position by the urging force of the return spring, and closes against the urging force of the return spring by receiving a gas flow pressure with respect to the inlet passage when the adjustment valve is fully opened. Diaphragm type pressure regulator characterized by being set to. The diaphragm type pressure regulator according to claim 1,
The permanent magnet has an outer diameter smaller than the upper surface of the suspended body and is fixed to the upper surface of the suspended body without protruding from the outer periphery of the suspended body,
The separating spring is formed by a compression coil spring having one end wound around the outer peripheral surface of the diaphragm connection body and fixed, and the other end wound around the outer peripheral surface of the suspension body. Has a function of moving up and down the suspended body, and a diaphragm type pressure regulator.

Images