CN215568273U

CN215568273U - Gas pressure regulator with waterproof structure

Info

Publication number: CN215568273U
Application number: CN202121784174.3U
Authority: CN
Inventors: 王斌; 董鑫
Original assignee: Chongqing Banan Natural Gas Co ltd
Current assignee: Chongqing Banan Natural Gas Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-01-18
Anticipated expiration: 2031-08-02

Abstract

The utility model relates to the technical field of gas equipment, in particular to a gas pressure regulator with a waterproof structure, which comprises an upstream pipeline, a downstream pipeline and a main pressure regulator, wherein the upstream pipeline is communicated with the downstream pipeline through a valve port; the main pressure regulator comprises a pressure regulating spring, a mounting pipe and a pressure regulating nut; the bottom and the side wall of the pressure regulating nut are respectively provided with a first breathing hole and a second breathing hole which are communicated; the beneficial technical effects of the utility model are as follows: under the condition that the gas pressure regulator is flooded by water, water can be prevented from entering the gas pressure regulator by arranging waterproof structures at multiple positions, and the damage to equipment caused by water inflow is avoided; has the characteristics of convenient operation and strong applicability.

Description

Gas pressure regulator with waterproof structure

Technical Field

The utility model relates to the technical field of gas equipment, in particular to a gas pressure regulator with a waterproof structure.

Background

The gas pressure regulator is also called pressure reducing valve, and is a special valve on the gas pipeline. The device can keep the gas pressure at the downstream outlet stable by automatically changing the gas flow through the valve no matter how the gas flow and the upstream pressure change. The gas pressure regulator not only can reduce the upstream gas pressure to a stable downstream pressure, but also can limit the downstream pressure within a safe range when the pressure regulator fails. For example, utility model patent with publication number CN2432411Y, named gas pressure regulator, is a common gas pressure regulator structure, and its structure includes: the device comprises an inlet ball valve group, an outlet ball valve group, a manifold, a filter, an inlet pressure gauge, a safety shut-off valve, a main pressure regulator and a pressure measuring device; the valve body of the pressure regulator adopts a manifold structure, and a valve seat and a valve port are arranged in the valve body; wherein the safety cut-off valve and the main pressure regulating valve are connected on the same header; the main pressure regulator adopts a lever type horizontal structure connected with a valve port through a horizontal valve rod, and comprises a pressure regulator tray, a pressure regulator membrane, an upper ejector rod, a horizontal connecting rod and a lower ejector rod, wherein the pressure regulator tray and the pressure regulator membrane are horizontally arranged, the upper end of the pressure spring is provided with the pressure spring, the lower end of the upper ejector rod is provided with the upper ejector rod, the horizontal connecting rod is provided with a sealing gasket, the lower ejector rod is positioned on the valve port in the manifold, and the main pressure regulator is communicated with the manifold through a guide pipe; the safety cut-off valve adopts a structure that a cut-off valve rod is clamped by a pin connected with a top sleeve, and comprises a cut-off valve tray and a cut-off valve membrane which are vertically installed, a top sleeve which is vertical to the cut-off valve membrane and a pressing mechanism of the top sleeve, wherein a cut-off valve rod which is controlled to stretch and retract by the pin vertically penetrates through the top sleeve, the upper end of the cut-off valve rod is provided with a sealing rubber seat which is positioned below a valve port, the lower end of the cut-off valve rod is provided with a reset handle of the cut-off valve rod, and a cavity of the safety cut-off valve is communicated with a manifold through a signal hole.

The pressure regulating working principle of the gas pressure regulator is as follows: when the inlet pressure P1 is reduced or the gas consumption is increased, the gas outlet pressure P2 is reduced and loses balance, at the moment, the lower ejector rod is lifted, the horizontal connecting rod drives the membrane to be reduced, the valve port G is opened greatly, the gas consumption is increased, the outlet pressure P2 is lifted back, and the new balance state is recovered. When the inlet pressure P1 increases or the gas consumption decreases, the gas outlet pressure P2 rises and loses balance. At this time, the lower ejector rod descends, the horizontal connecting rod drives the leather membrane to ascend, the opening degree of the valve port G is driven to be reduced, the gas quantity is reduced, the outlet pressure P2 descends, and the valve port G is restored to a new balance state. Therefore, no matter how the inlet pressure P1 and the gas consumption are changed, the pressure regulator can automatically maintain stable gas supply pressure through the regulating action of the spring.

Because the upper chamber of the main pressure regulator needs to be communicated with the external atmosphere to ensure that the leather membrane can move up and down under the action of the pressure difference of the upper chamber and the lower chamber, the upper chamber is provided with a breathing hole communicated with the external atmosphere and is required to be kept normally open. However, when flood or waterlogging occurs and the like, water easily enters the pressure regulator from the breathing hole after the gas pipeline is closed, and when the water level is withdrawn and the gas is ventilated again, the water stored in the upper cavity of the leather membrane affects the up-and-down movement of the leather membrane, so that the pressure regulator cannot be normally used. Therefore, how to design a gas pressure regulator with a waterproof function becomes a problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a gas pressure regulator with a waterproof structure, which has the characteristics of good waterproof effect and convenience in operation.

In order to realize the purpose, the following technical scheme is provided:

a gas pressure regulator with a waterproof structure comprises an upstream pipeline, a downstream pipeline and a pressure regulator, wherein the upstream pipeline is communicated with the downstream pipeline through a valve port; the pressure regulator comprises a pressure regulating spring, a mounting pipe and a pressure regulating nut; the bottom and the side wall of the pressure regulating nut are respectively provided with a first breathing hole and a second breathing hole which are communicated.

Further, the number of the second breathing holes is more than one.

Further, the pressure regulating spring is clamped and fixed at the bottom of the pressure regulating nut, and the pressure regulating nut is in threaded connection with the installation pipe.

Furthermore, the bottom of the pressure regulating nut is provided with a boss or a concave platform, and the pressure regulating nut is sleeved on the boss or is clamped in the concave platform.

Furthermore, the outer wall of the pressure regulating nut and the upper part of the second breathing hole are sleeved with a first sealing gasket.

Furthermore, a cut-off valve mechanism for closing the valve port is arranged at the lower part of the upstream pipeline, and the cut-off valve mechanism comprises a cut-off valve rod, a cut-off valve connecting rod, a cut-off spring, a cut-off valve membrane and a compression spring; and a second sealing gasket is arranged at the bottom of the cut-off valve rod, and the distance from the second sealing gasket to the mounting hole of the cut-off valve rod at the bottom of the housing of the cut-off valve mechanism is less than the compression amount of the compression spring.

The working principle and the using principle of the utility model are as follows: this scheme sets up the breather hole of gas pressure regulator on the pressure regulating nut, when the situation that the water level rises such as flood or waterlogging takes place, the back is closed to the gas pipeline, in order to prevent water from getting into the gas pressure regulator from the breather hole, through twisting the pressure regulating nut downwards, screws into the second breather hole in order to reach waterproof sealing's effect in the installation pipe. When the water level retreats, the pressure regulating nut is reset again, the second breathing hole on the side wall of the pressure regulating nut is exposed to be connected with the outside atmosphere, and the gas pipeline recovers the normal ventilation operation.

The beneficial technical effects of the utility model are as follows: when the gas pressure regulator is subjected to flooding, water can be prevented from entering the gas pressure regulator by arranging waterproof structures at multiple positions, and the damage to equipment caused by water inflow is avoided; has the characteristics of convenient operation and strong applicability.

Drawings

Fig. 1 is a sectional structure diagram of the gas pressure regulator with a waterproof structure.

Fig. 2 is a schematic view of an installation structure of the gas pressure regulator with a waterproof structure according to the present invention.

Fig. 3 is a schematic view of an installation structure of the adjusting nut and the pressure regulating spring in the utility model.

Fig. 4 is a schematic view of another mounting structure of the adjusting nut and the pressure regulating spring according to the present invention.

In the figure: 1. a voltage regulator; 101. a pressure regulating spring; 102. installing a pipe; 103. a first breathing hole; 104. a second breathing hole; 105. a first gasket; 106. a boss; 107. a concave platform; 108. a pressure regulating membrane; 109. a lever mechanism; 110. an upper valve nozzle; 111. a pressure regulating chamber; 112. a gas chamber; 113. a pressure regulating nut; 2. a shut-off valve mechanism; 201. cutting off the valve rod; 202. a second gasket; 203 cutting off the spring; 204. cutting off the membrane; 205. a pin; 206. a reset handle; 207. a pressure regulating screw cap; 208. a compression spring; 209. a lower valve mouth; 210. a breathing hole is cut off; 211. a seal ring; 3. an upstream conduit; 4. a downstream conduit; 5. a pressure sensing tube; 6. a filter; 7. and a pressure gauge.

Detailed Description

The gas pressure regulator with waterproof structure of the utility model is further explained with reference to the attached drawings and the specific embodiment.

The gas pressure regulator is a device for regulating and controlling outlet pressure when gas flow and inlet pressure change, and can reduce higher gas inlet pressure to stable lower outlet pressure.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, a gas pressure regulator with a waterproof structure comprises an upstream pipeline 3, a downstream pipeline 4 and a pressure regulator 1, wherein the upstream pipeline 3 is communicated with the downstream pipeline 4 through a valve port; the pressure regulator 1 comprises a membrane shell, a pressure regulating membrane 108, a pressure regulating spring 101, a mounting pipe 102, a lever mechanism 109, an upper valve nozzle 110 and a pressure regulating nut 113; the pressure regulating membrane 108 is vertically divided into a pressure regulating cavity 111 and an air cavity 112 in the membrane shell; the downstream pipeline 4 is communicated with the air chamber 112 through a pressure sensing pipe 5; the bottom and the side wall of the pressure regulating nut 113 are respectively provided with a first breathing hole 103 and a second breathing hole 104 which are communicated.

The breathing hole setting of this scheme with gas pressure regulator is on pressure regulating nut 113, and under the state of ventilating, exposes second breathing hole 104 and installs pipe 102, makes outside atmosphere and pressure regulation chamber 111 intercommunication. When flood or waterlogging and other water level rising conditions occur, after the gas pipeline is closed, in order to prevent water from entering the gas pressure regulator from the second breathing hole 104, the second breathing hole 104 is screwed into the mounting pipe 102 by screwing the pressure regulating nut 113 downwards so as to achieve the waterproof sealing effect. When the water level is withdrawn, the pressure regulating nut 113 is reset, the second breathing hole 104 positioned on the side wall of the pressure regulating nut 113 is exposed and connected with the external atmosphere, and the gas pipeline is restored to the normal ventilation operation.

In this embodiment, the membrane housing is divided into an upper membrane housing and a lower membrane housing, and the mounting pipe 102 is integrally connected to the upper membrane housing and is communicated with each other. Pressure regulating involucra 108 centre gripping is between last membrane shell and lower membrane shell to divide into pressure regulation chamber 111 and air chamber 112 with the membrane shell, pressure regulating spring 101 is placed in installation pipe 102, and pressure regulating spring 101's bottom is installed on the diaphragm dish in involucra middle part, and the top card is fixed in the bottom of pressure regulating nut 113. A movable connecting rod on one side of a lever in the lever mechanism 109 is connected with the bottom of the membrane disc; the movable connecting rod on the other side is connected with an upper valve nozzle 110, and the upper valve nozzle 110 is positioned at the upper part of the valve port and used for adjusting the ventilation quantity of the fuel gas passing through the valve port. The downstream pipe 4 communicates with the air chamber 112 through the pressure-sensitive tube 5 so that the pressures of the downstream pipe 4 and the air chamber 112 are the same.

When the pressure of the upstream pipeline 3 is reduced or the gas consumption is increased, the pressure of the downstream pipeline 4 is reduced, at the moment, the downward stress of the pressure regulating spring 101 in the pressure regulating cavity 111 and the pressure of the gas cavity 112 are small at the top, the pressure regulating membrane 108 drives the pressure regulating spring 101 to move downwards, the movable connecting rod on one side of the lever mechanism 109 is driven to move downwards, the movable connecting rod on the other side moves upwards, the upper valve nozzle 110 is driven to ascend, the valve port is opened greatly, and the gas consumption is increased. The pressure of the downstream pipe 4 rises, and the downward stress of the pressure regulating spring 101 in the pressure regulating chamber 111 and the pressure of the gas chamber 112 are restored to the equilibrium state. When the pressure of the upstream pipe 3 increases or the gas consumption decreases, the pressure of the downstream pipe 4 increases, and the downward stress of the pressure regulating spring 101 in the pressure regulating chamber 111 and the pressure of the gas chamber 112 increase up and down. The pressure regulating membrane 108 presses the pressure regulating spring 101 to move upwards, so that the movable connecting rod on one side of the lever mechanism 109 is driven to move upwards, the movable connecting rod on the other side moves downwards, the upper valve nozzle 110 is driven to descend, the valve port opening is reduced, and the gas quantity is reduced. The pressure of the downstream pipe 4 is reduced, and the downward stress of the pressure regulating spring 101 in the pressure regulating chamber 111 and the pressure of the gas chamber 112 are restored to the equilibrium state. The amount of compression of the pressure regulating spring is controlled by the pressure regulating nut 113, thereby regulating the pressure difference between the downward stress of the pressure regulating spring in the pressure regulating chamber 111 and the pressure of the gas chamber 112.

The filter 6 is arranged in the upstream pipeline 3 and used for filtering solid particle impurities and liquid drops in the fuel gas of the conveying medium, improving the purity of the fuel gas and ensuring the normal operation of the pipeline and equipment. The pressure gauge 7 is used for displaying the pressure condition of the upstream pipeline 3.

This technical scheme also can be based on the improvement that the utility model patent that publication number is CN2432411Y relates to in the name of gas pressure regulator carries out the gas pressure regulator structure.

Further, the number of the second breathing holes 104 is more than one. When the number of the second breathing holes 104 is one, the cross sections of the first breathing holes 103 and the second breathing holes 104 form an L-shaped channel. When the number of the second breathing holes 104 is two, the cross sections of the first breathing holes 103 and the second breathing holes 104 form a T-shaped channel.

Further, the pressure regulating spring 101 is clamped and fixed at the bottom of the pressure regulating nut 113, and the pressure regulating nut 113 is in threaded connection with the mounting pipe 102. Specifically, the bottom of the pressure regulating nut 113 is provided with a boss 106 or a concave table 107, and the pressure regulating spring 101 is sleeved on the boss 106 or is clamped and fixed in the concave table 107, so that the pressure regulating spring 101 is stabilized, and the pressure regulating spring 101 is prevented from deflecting in the installation pipe 102.

Further, a first gasket 105 is fitted over the outer wall of the pressure regulating nut 113 and the upper portion of the second breathing hole 104. When the pressure regulating nut 113 is screwed to screw the second breathing hole 104 into the mounting tube 102, the waterproof effect is improved between the pressure regulating nut 113 and the top of the mounting tube 102 through the first sealing gasket 105.

Further, a shut-off valve mechanism 2 is further included, in the present embodiment, a shut-off valve mechanism 2 for closing a valve port is provided at a lower portion of the upstream pipe 3, and the shut-off valve mechanism 2 includes a shut-off valve stem 201, a shut-off valve crossbar, a shut-off spring 203, a shut-off valve membrane 204, and a compression spring 208; the bottom of the shutoff valve rod 201 is provided with a second gasket 202, and the distance from the second gasket 202 to the mounting hole of the shutoff valve rod 201 at the bottom of the housing of the shutoff valve mechanism 2 is smaller than the compression amount of the compression spring 208.

When flood, waterlogging and other water level rising conditions occur, a worker manually turns the pressure regulating screw cap 207 in the cut-off valve mechanism 2, actively enables the pin 205 clamped with the cut-off valve rod 201 to be separated from constraint, so that the cut-off valve rod 201 rises rapidly under the spring force action of the compression spring 208, and then the second sealing gasket 202 at the bottom of the cut-off valve rod 201 is tightly attached to the outer side of the mounting hole under the spring force action, so that the sealing purpose is achieved.

In this embodiment, as shown in fig. 1, the shut-off valve skin 204 is vertically installed in the membrane housing, and the shut-off valve stem 201 is vertically installed in the membrane housing. The middle part of the cutting valve skin 204 is provided with a membrane disc, the cross rod of the cutting valve is transversely arranged on the membrane disc, and the cross rod of the cutting valve is provided with a pin 205 which can clamp the opening of the outer wall of the cutting valve rod 201. The shut-off valve membrane 204 divides the membrane housing into left and right chambers, the right chamber communicating with the downstream conduit 4. When the pressure regulator 1 breaks down and the pressure of the downstream pipeline 4 exceeds a safety threshold value, the cut-off membrane drives the transverse cross rod of the cut-off valve to move leftwards, so that the pin 205 which is originally clamped with the opening on the outer wall of the cut-off valve rod 201 is separated from the opening, the cut-off valve rod 201 moves upwards under the action of the compression spring 208, the valve port is sealed by the lower valve nozzle 209, and the purpose of stopping air supply to the downstream pipeline 4 is achieved. In addition, after the fault is eliminated, the pin 205 can be clamped again by pulling the reset handle 206 downwards. In other embodiments, the shut-off valve mechanism 2 may also adopt a safety shut-off valve structure as disclosed in the utility model patent with publication number CN2432411Y, entitled gas pressure regulator.

In this embodiment, the bottom and the side wall of the pressure-regulating screw cap 207 are provided with a communicating cut-off valve breathing hole 210, and the outer wall of the pressure-regulating screw cap 207 is provided with a sealing ring 211. Set up trip valve breathing hole 210 on pressure regulating spiral cover 207, when the situation that the water level rises such as flood or waterlogging takes place, the gas pipeline is closed the back, in order to prevent water from getting into the trip valve from the breathing hole, through screwing up pressure regulating spiral cover 207 downwards, with the trip valve breathing hole 210 on the lateral wall screw in the pressure regulating installation pipe of trip valve to together with sealing washer 211 in order to reach waterproof sealing's effect. When the water level is removed, the pressure regulating screw cap 207 is reset, so that the cut-off valve breathing hole 210 on the side wall of the pressure regulating screw cap 207 is exposed and connected with the external atmosphere, and the normal ventilation operation is resumed. In other embodiments, if the shut-off valve breathing hole 210 is located on the mounting tube of the pressure-regulating screw cap 207, an anchor ear form can be adopted, and the shut-off valve breathing hole 210 is blocked by using a sealing plug in the anchor ear.

The outer end of the cut-off spring 203 is clamped and fixed at the inner end of the pressure regulating screw cap 207, and the pressure regulating screw cap 207 is in threaded connection with a pressure regulating installation pipe of the cut-off valve. Specifically, the inner end of the pressure regulating screw cap 207 is also provided with a boss or a concave table, and the cut-off spring 203 is sleeved on the boss or clamped in the concave table, so that the cut-off spring 203 is favorably stabilized, and the cut-off spring 203 is prevented from deflecting in a pressure regulating installation pipe of the cut-off valve.

The gas pressure regulator is often still equipped with the bypass voltage regulator for reserve, convenient detection and debugging pressure. The structure of the water-proof type pressure regulator is often the same as that of the pressure regulator 1, so that the auxiliary line pressure regulator can adopt the water-proof mode of the pressure regulator 1.

Claims

1. A gas pressure regulator with a waterproof structure comprises an upstream pipeline (3), a downstream pipeline (4) and a pressure regulator (1), wherein the upstream pipeline (3) is communicated with the downstream pipeline (4) through a valve port; the pressure regulator (1) comprises a pressure regulating spring (101), a mounting pipe (102) and a pressure regulating nut (113); the pressure regulating nut is characterized in that the bottom and the side wall of the pressure regulating nut (113) are respectively provided with a first breathing hole (103) and a second breathing hole (104) which are communicated with each other.

2. The gas pressure regulator with waterproof structure as claimed in claim 1, wherein the number of the second breathing holes (104) is more than one.

3. The gas pressure regulator with the waterproof structure according to claim 1 or 2, wherein the pressure regulating spring (101) is clamped and fixed at the bottom of the pressure regulating nut (113), and the pressure regulating nut (113) is in threaded connection with the mounting pipe (102).

4. A gas pressure regulator with waterproof structure as claimed in claim 3, wherein the bottom of the pressure regulating nut (113) is provided with a boss (106) or a concave table (107), and the pressure regulating nut (113) is sleeved on the boss (106) or is clamped in the concave table (107).

5. The gas pressure regulator with waterproof structure as claimed in claim 1, 2 or 4, wherein the first sealing gasket (105) is sleeved on the upper portion of the second breathing hole (104) on the outer wall of the pressure regulating nut (113).

6. A gas pressure regulator with waterproof structure as claimed in claim 3, wherein the first sealing gasket (105) is sleeved on the upper portion of the second breathing hole (104) on the outer wall of the pressure regulating nut (113).

7. The gas pressure regulator with waterproof structure according to claim 1, 2, 4 or 6, characterized in that a shut-off valve mechanism (2) for closing the valve port is provided at the lower part of the upstream pipe (3), the shut-off valve mechanism (2) comprises a shut-off valve rod (201), a shut-off valve connecting rod, a shut-off spring (203), a shut-off valve membrane (204), a pressure regulating screw cap (207) and a compression spring (208); and a second sealing gasket (202) is arranged at the bottom of the cut-off valve rod (201), and the distance from the second sealing gasket (202) to the mounting hole of the cut-off valve rod (201) at the bottom of the shell of the cut-off valve mechanism (2) is less than the compression amount of the compression spring (208).

8. A gas pressure regulator with waterproof structure according to claim 3, characterized in that a shut-off valve mechanism (2) for closing the valve port is provided at the lower part of the upstream pipe (3), the shut-off valve mechanism (2) comprising a shut-off valve rod (201), a shut-off valve link, a shut-off spring (203), a shut-off valve membrane (204), a pressure regulating rotary cover (207) and a compression spring (208); and a second sealing gasket (202) is arranged at the bottom of the cut-off valve rod (201), and the distance from the second sealing gasket (202) to the mounting hole of the cut-off valve rod (201) at the bottom of the shell of the cut-off valve mechanism (2) is less than the compression amount of the compression spring (208).

9. The gas pressure regulator with waterproof structure of claim 5, characterized in that, in the lower part of the upstream pipeline (3), there is a shut-off valve mechanism (2) for closing the valve port, the shut-off valve mechanism (2) includes a shut-off valve rod (201), a shut-off valve connecting rod, a shut-off spring (203), a shut-off valve membrane (204), a pressure regulating rotary cover (207) and a compression spring (208); and a second sealing gasket (202) is arranged at the bottom of the cut-off valve rod (201), and the distance from the second sealing gasket (202) to the mounting hole of the cut-off valve rod (201) at the bottom of the shell of the cut-off valve mechanism (2) is less than the compression amount of the compression spring (208).

10. The gas pressure regulator with waterproof structure of claim 7, characterized in that the bottom and the side wall of the pressure regulating screw cap (207) are provided with a communicating cut-off valve breathing hole (210), and the outer wall of the pressure regulating screw cap (207) is provided with a sealing ring (211).