CN114060726B - Gas pressure regulating system - Google Patents

Abstract

The invention relates to a gas pressure regulating system, comprising a pressure regulating box, a release tower and a protective box. The inner cavity of the pressure regulating box is divided into an air intake chamber and a pressure regulating chamber by a first partition plate, and the pressure regulating chamber is passed through a second partition plate. It is separated from the third partition into a primary pressure chamber and a secondary pressure chamber. The third partition is provided with a pressure regulating valve port. , the upper end of the connecting pipe is provided with a cut-off valve port, the lower end of the connecting pipe is connected to the primary pressure chamber, the pressure regulator and the cut-off valve are sealed and fixed on the pressure regulating box, the pressure regulator is used to control the size of the pressure-regulating valve port, and the cut-off valve It is used to close the shut-off valve when the air pressure in the secondary pressure chamber rises to the preset pressure value. The venting tower is provided with a venting pipe, an air inlet pipe and an air outlet pipe. The venting pipe is connected with the venting valve, and the air inlet pipe And the air outlet pipe is communicated with the inner cavity of the protective box. It has the advantages of simple structure, convenient maintenance, good safety, high reliability and strong adaptability.

Description

A gas pressure regulating system

technical field

The invention relates to a pressure regulating system, in particular to a straight-through buried gas pressure regulating system.

Background technique

With the development of science and technology and society, the gas pipeline network is increasingly adopting the arrangement of burying the surge tank underground (referred to as buried surge tank) to save ground space, improve safety, and increase the safety of the surge tank. A protective box is provided on the surge tank to protect various equipment on the surge tank. However, the existing buried pressure regulating box still has the following problems in practical application: 1. The structure is complex, the safety is poor, and the maintenance is inconvenient; 2. Because the protective box does not have a ventilation function, it is easy to accumulate gas due to leakage. Accident risk, on the other hand, it will cause injury to maintenance personnel; 2. The arrangement of the venting pipe is not standardized, which affects the venting effect.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a gas pressure regulating system, which has the advantages of simple structure, convenient maintenance, good safety, high reliability and strong adaptability.

In order to solve the above problems existing in the prior art, the present invention provides a gas pressure regulating system, including a pressure regulating box buried in the ground and a release tower fixed on the ground, and a protective box exposed to the ground is sealed and fixed on the pressure regulating box. , the protective box includes a bottom shell and a box cover hinged on the bottom shell, the inner cavity of the pressure regulating box is divided into an intake chamber and a pressure regulating chamber by a first partition plate, and the pressure regulating chamber is separated by a second partition plate and a third pressure regulating chamber. The partition is divided into a primary pressure chamber and a secondary pressure chamber. The third partition is provided with a pressure regulating valve port. The left and right sides of the box are correspondingly provided with an air inlet pipe and an air outlet pipe that communicate with the air inlet chamber and the secondary pressure chamber. A communication pipe is fixed in the air inlet chamber. The upper end of the communication pipe is provided with a cut-off valve port. The pressure chamber is connected, and the pressure regulator and shut-off valve in the protective box are sealed and fixed on the pressure regulating box. The pressure regulator is used to control the size of the pressure regulating valve port, and the shut-off valve is used when the air pressure in the secondary pressure chamber rises to When the preset pressure value is set, the shut-off valve port is closed. The release tower is provided with a release pipe, an air inlet pipe and an air outlet pipe. The release pipe is connected with the release valve, and the air inlet pipe and the air outlet pipe are respectively connected with the inner cavity of the protective box. Connected.

Further, the present invention provides a gas pressure regulating system, wherein a support plate is fixed in the air inlet chamber, the communication pipe passes through the support plate and the two are sealed and fixedly connected, and the lower end of the communication pipe is connected to the first partition plate. The connection is sealed and fixed, a filter cartridge is sleeved on the periphery of the communication pipe, and the upper and lower ends of the filter cartridge are correspondingly pressed against the pressure regulating box and the support plate.

Further, the present invention provides a gas pressure regulating system, wherein the venting tower includes a hollow tower body, a tee joint is installed on the top of the tower body, and a venting cap is connected to the left port of the tee joint through a left elbow, and the tee The right port of the joint is connected with an arc-shaped pipe through a right-bend pipe, the port of the arc-shaped pipe faces downward and is combined with the right bend pipe to form an S shape, and the release pipe, the air inlet pipe and the air outlet pipe extend into the tower from the opening at the lower end The upper end of the venting pipe is in the venting cap, the upper end of the air inlet pipe protrudes from the opening in the middle of the tower body, and the upper end of the air outlet pipe is in the arc-shaped pipe.

Further, the present invention provides a gas pressure regulating system, wherein the bottom of the tower body is provided with a fixed flange, the middle part of the tower body is fixed with a bellows with an opening on one side, the upper end of the air inlet pipe is located in the bellows, the release cap is It includes an integrated mouthpiece and a hollow mushroom head, and the bottom wall of the mushroom head is provided with spaced distribution holes around the mouthpiece.

Further, the present invention is a gas pressure regulating system, wherein the upper side of the bottom case is fixed with a frame with an L-shaped cross section through screws, and a transparent sealing plate is fixed in the frame by screws, and the frame is connected with the bottom case. A sealing ring is arranged between the sealing plates, the upper end of the frame is provided with a protrusion, one end of the box cover is hinged with the frame, the other end of the box cover and the frame are provided with a locking mechanism, and the lower side of the box cover is embedded with a protrusion. Fitting seals.

Further, the present invention provides a gas pressure regulating system, wherein the shut-off valve includes a valve body, a membrane, a sliding sleeve, a guide sleeve, a first spring seat, a valve stem, a valve disc, a driving spring and a balance spring, and the valve body is sealed It is fixed on the pressure regulating box, the outer edge of the membrane is sealed and fixed to the valve body, and the inner cavity of the valve body is divided into an upper cavity and a lower cavity. In the middle of the membrane, the inner wall of the sliding sleeve is provided with an inner ring groove, the guide sleeve is sealed and fixed on the valve body, the guide sleeve is provided with a first ring platform on the lower side of the valve body, and the upper end of the guide sleeve extends into the sliding sleeve, The guide sleeve is provided with a plurality of conical holes distributed in the circumferential direction, and the conical holes are provided with steel balls that cooperate with the inner ring groove. The first spring seat is installed in the valve body through the adapter, and the valve rod passes through the guide sleeve, The sliding sleeve and the first spring seat, a sealing ring is arranged between the valve stem, the sliding sleeve and the guide sleeve, the outer ring groove matched with the steel ball is arranged on the valve stem, and the valve disc is installed on the lower end of the valve stem and is opposite to the cut-off valve port Setting, the driving spring is sleeved on the guide sleeve and its upper and lower ends are correspondingly pressed on the first ring platform and the valve disc, and the balance spring is sleeved on the valve stem and its upper and lower ends are correspondingly pressed on the first spring seat and the sliding sleeve. superior.

Further, the present invention provides a gas pressure regulating system, wherein the valve body includes an upper valve body and a lower valve body that are fixedly connected by screws, an end cap is installed on the upper port of the upper valve body through threads, and the end cap is connected to the upper valve body. A sealing ring is arranged between the bodies, the guide sleeve is installed on the lower valve body through threads, a sealing ring is arranged between the first ring platform and the lower valve body, and the outer edge of the film is pressed against the upper valve body and the lower valve body between the bodies.

Further, the present invention provides a gas pressure regulating system, wherein the adapter includes a support seat, a second spring seat, a support sleeve and a support spring, the support seat is clamped in the upper valve body, and the second spring seat is threaded Installed in the upper valve body, the lower end of the support sleeve is clamped on the support seat through the second ring platform extending outward, the support spring is sleeved on the support sleeve and its upper and lower ends press against the second spring seat and the second spring seat correspondingly. On the ring platform, the first spring seat is installed in the support sleeve through threads, and the upper end of the sliding sleeve extends into the support seat and the support sleeve.

Further, the present invention provides a gas pressure regulating system, wherein the valve flap includes a connecting column, a support plate and a retaining ring, and the upper end of the connecting column is sleeved on the valve stem through a groove arranged along the central axis, and the two pass through. The pin shaft is connected, a third ring platform is arranged on the connecting column, a third spring seat is sleeved on the connecting column on the upper side of the third ring platform, the lower end of the driving spring is pressed on the third spring seat, and the support plate and the retaining ring It is sleeved on the connecting column from bottom to top, and the support plate is in the shape of a circular truncated cone. The upper side of the support plate is clamped with a first sealing gasket through a sealing groove. A second sealing gasket opposite to the cut-off valve port is embedded on the conical surface of the support plate, and the blocking ring is connected with the connecting column through a pin shaft.

Further, the present invention is a gas pressure regulating system, wherein the lower end of the sliding sleeve is provided with a fourth ring platform, the sliding sleeve is sleeved with a pressure plate and a compression nut, the compression nut is threaded with the sliding sleeve, and the membrane The inner edge is squeezed between the fourth ring platform and the pressure plate.

Compared with the prior art, the gas pressure regulating system of the present invention has the following advantages: in the present invention, a pressure regulating box buried in the ground and a release tower fixed on the ground are arranged, and the protective box exposed to the ground is sealed and fixed on the pressure regulating box. , let the protective box be provided with a bottom shell and a box cover hinged on the bottom shell, wherein the inner cavity of the surge tank is divided into an intake chamber and a surge chamber by a first partition, and the surge chamber is separated by a second partition and a first partition. The three partitions are divided into a primary pressure chamber and a secondary pressure chamber. The third partition is provided with a pressure regulating valve port. The left and right sides of the pressure box are correspondingly provided with an air inlet pipe and an air outlet pipe which are communicated with the air inlet chamber and the secondary pressure chamber. A communication pipe is fixed in the air inlet chamber. The pressure regulator and the shut-off valve in the protective box are sealed and fixed on the pressure regulating box, wherein the pressure regulator is used to control the size of the pressure regulating valve port, and the shut-off valve is used when the air pressure in the secondary pressure chamber is When the pressure rises to the preset pressure value, the shut-off valve port is closed; a release pipe, an air inlet pipe and an air outlet pipe are arranged on the release tower, wherein the release pipe is connected to the release valve through the side wall of the protective box, and the air inlet pipe and The air outlet pipes are respectively communicated with the inner cavity of the protective box. As a result, a gas pressure regulating system with simple structure, convenient maintenance, good safety, high reliability and strong adaptability is formed. The delivery pipe is sealed and connected, and the purpose of pressure regulation can be achieved by controlling the size of the pressure regulating valve port through the pressure regulator when the gas flows through the pressure regulating box. In the present invention, the surge tank is divided into the intake chamber, the primary pressure chamber and the secondary pressure chamber by the first partition, the second partition and the third partition, and the communication pipe is fixed in the intake chamber, and the third The pressure regulating valve port and the shut-off valve port are correspondingly arranged on the baffle and the connecting pipe, forming a straight-through buried pressure regulating box. On the one hand, the pressure regulation range and applicability are improved; by setting the gas storage tank and the release valve connected to the secondary pressure chamber, on the one hand, the buffer and voltage stabilization of the gas storage tank improves the stability of the downstream gas supply, and on the other hand, through the The overpressure release function of the relief valve improves safety; by adopting a modular installation method to seal and fix the pressure regulator and shut-off valve on the pressure regulating box, the convenience of disassembly and maintenance is improved. When the pressure regulator or shut-off valve is used When a fault occurs, it is only necessary to remove it and replace it. On the one hand, the normal operation of the gas pipeline network is ensured, and on the other hand, the old pressure regulator or shut-off valve can be sent to the factory for maintenance, which realizes rapid maintenance and repair. The purpose is to make the shut-off valve close the shut-off valve port when the air pressure in the secondary pressure chamber unexpectedly rises to the preset pressure value, which enhances the safety; Equipment such as pressure regulators and shut-off valves play an effective protective role and improve the safety and reliability of the equipment. On the other hand, the equipment can be inspected and maintained by opening the protective box, which improves the convenience of operation; The standardization of arranging the release pipe, air inlet pipe and air outlet pipe is improved. By setting the release pipe, the gas discharged from the release valve can be discharged into the air to ensure the release effect. By setting the air inlet pipe and the air outlet pipe, the protective box can be The ventilation function is realized, which can effectively avoid the accumulation of gas in the protective box due to leakage, and improve the safety.

A gas pressure regulating system of the present invention will be further described in detail below with reference to the specific embodiments shown in the accompanying drawings.

Description of drawings

1 is a front view of a gas pressure regulating system of the present invention;

Fig. 2 is an axonometric view of a gas pressure regulating system of the present invention;

3 is a front view of the combination of a pressure regulating box and a protective box in a gas pressure regulating system of the present invention;

4 is a top view of the combination of a pressure regulating box and a protective box in a gas pressure regulating system of the present invention;

5 is an axonometric view of the combination of a pressure regulating box and a protective box in a gas pressure regulating system of the present invention;

Fig. 6 is the A-A view in Fig. 4;

7 is a front view of a pressure regulating box in a gas pressure regulating system of the present invention;

8 is a top view of a pressure regulating box in a gas pressure regulating system of the present invention;

9 is an axonometric view of a pressure regulating box in a gas pressure regulating system of the present invention;

Fig. 10 is the C-C direction view in Fig. 8;

Fig. 11 is a partial enlarged view of position B in Fig. 6;

Fig. 12 is a partial enlarged view of position D in Fig. 10;

Fig. 13 is a front view of a venting tower in a gas pressure regulating system of the present invention;

Figure 14 is a rear view of a venting tower in a gas pressure regulating system of the present invention;

Fig. 15 is an axonometric view of a venting tower in a gas pressure regulating system of the present invention;

Figure 16 is a front view of a venting cap in a gas pressure regulating system of the present invention;

Fig. 17 is the E-E direction view in Fig. 16;

Fig. 18 is a bottom view of a venting cap in a gas pressure regulating system of the present invention;

Figure 19 is an axonometric view of a venting cap in a gas pressure regulating system of the present invention.

Detailed ways

First of all, it should be noted that the orientation words such as upper, lower, left, right, front and rear described in the present invention are only descriptions according to the accompanying drawings, so as to facilitate understanding and do not limit the technical solutions of the present invention and the claimed protection scope. .

As shown in Figures 1 to 19, a specific embodiment of a gas pressure regulating system of the present invention includes a pressure regulating box 1 buried in the ground and a release tower 2 fixed on the ground. The protective box 3 is provided with a bottom case 31 and a box cover 32 hinged on the bottom case 31, wherein the inner cavity of the surge tank 1 is divided into an air intake chamber 12 and a surge chamber by the first partition 11, The pressure regulating chamber is divided into a primary pressure chamber 15 and a secondary pressure chamber 16 by the second diaphragm 13 and the third diaphragm 14. The third diaphragm 14 is provided with a pressure regulating valve port 141, and the secondary pressure chamber 16 passes through a pipe. The road is connected with the air storage tank 4 and the release valve 5 in the protective box 3 in turn. The left and right sides of the pressure regulating box 1 are correspondingly provided with an air intake pipe 17 and an air outlet pipe 18 communicating with the air inlet chamber 12 and the secondary pressure chamber 16. A communication pipe 19 is fixed in the air inlet chamber 12 , the upper end of the communication pipe 19 is provided with a shut-off valve port 191 , and the lower end of the communication pipe 19 communicates with the primary pressure chamber 15 . The pressure regulator 6 and the shut-off valve 7 in the protective box 3 are sealed and fixed on the pressure regulating box 1, wherein the pressure regulator 6 is used to control the size of the pressure regulating valve port 141, and the shut-off valve 7 is used for the secondary pressure chamber When the air pressure in 16 rises to a preset pressure value, the shut-off valve port 191 is closed. A release pipe, an air inlet pipe and an air outlet pipe are arranged on the release tower 2 , wherein the release pipe is connected with the release valve 5 , and the air inlet pipe and the air outlet pipe are respectively communicated with the inner cavity of the protective box 3 .

A gas pressure regulating system with simple structure, convenient maintenance, good safety, high reliability and strong adaptability is formed through the above structural settings. The pipe is sealed with the downstream gas delivery pipe, and the purpose of pressure regulation can be achieved by controlling the size of the pressure regulating valve port 141 through the pressure regulator 6 during the process of gas flowing through the pressure regulating box 1 . In the present invention, the surge tank 1 is divided into the intake chamber 12 , the primary pressure chamber 15 and the secondary pressure chamber 16 by the first partition 11 , the second partition 13 and the third partition 14 . The connecting pipe 19 is fixed in the middle, and the pressure regulating valve port 141 and the shut-off valve port 191 are correspondingly set on the third baffle 14 and the connecting pipe 19 to form a straight-through buried pressure regulating box. Compared with the axial flow pressure regulating box, On the one hand, the structure is simplified and the technological difficulty is reduced, and on the other hand, the pressure regulation range and applicability are improved. By arranging the air storage tank 4 and the release valve 5 connected to the secondary pressure chamber 16 , on the one hand, the stability of the downstream gas supply is improved by the buffer and voltage stabilization of the air storage tank 4 , and on the other hand, the overpressure of the release valve 5 is used to improve the stability of the downstream gas supply. Diffusing action increases safety. By adopting a modular installation method to seal and fix the pressure regulator 6 and the shut-off valve 7 on the pressure regulating box 1, the convenience of disassembly and maintenance is improved. When the pressure regulator 6 or the shut-off valve 7 fails, only the It can be removed and replaced. On the one hand, it ensures the normal operation of the gas pipeline network. On the other hand, the old pressure regulator or shut-off valve can be sent to the factory for maintenance, which realizes the purpose of rapid maintenance and repair. When the air pressure in 16 unexpectedly rises to a preset pressure value (safety value), the shut-off valve 7 closes the shut-off valve port 191 to enhance safety. By setting the protective box 3, on the one hand, it can effectively protect the equipment such as the gas storage tank 4, the release valve 5, the pressure regulator 6, the shut-off valve 7, etc., and improve the safety and reliability of the equipment. The protective box 3 checks and maintains the equipment, which improves the convenience of operation. By setting the release tower 2, the standardization of arranging the release pipe, the air inlet pipe and the air outlet pipe is improved. By setting the release pipe, the gas discharged from the release valve 5 can be discharged into the air, which ensures the release effect. By setting the air inlet pipe And the air outlet pipe makes the protective box 3 realize the ventilation function, which can effectively avoid the accumulation of gas in the protective box 3 due to leakage, and improve the safety. In practical applications, the present invention usually adopts a welded structure for the surge tank 1 to ensure the stability of the structure and the reliability of sealing.

As a specific embodiment, the present invention adopts the following fixing method for the communication pipe 19: the support plate 192 is fixed in the intake chamber 12, the communication pipe 19 is passed through the support plate 192 and the two are sealed and fixedly connected, and the communication pipe 19 Its lower end is sealed and fixedly connected with the first partition 11 . At the same time, in this specific embodiment, a filter cartridge 8 is sleeved on the periphery of the communication pipe 19 , and the upper and lower ends of the filter cartridge 8 are correspondingly pressed against the pressure regulating box 1 and the support plate 192 . This structural arrangement improves the stability and reliability of the support through the support plate 192, and the filter cartridge 8 can effectively filter out impurities in the gas, thereby improving the gas quality after pressure regulation and the gas safety of the end customer. In practical application, the present invention usually adopts the welding sealing and fixing direction of the communication pipe 19, the support plate 192 and the first partition plate 11, and sets the sealing ring on the upper and lower ends of the filter cartridge 8 to improve the reliability of sealing. In order to ensure the stability of the support and buried state, the present invention usually fixes the surge tank 1 on the support frame 9 .

As an optimized solution, in this embodiment, the dispersion tower 2 adopts the following structure: a hollow tower body 21 is provided, a tee joint 22 is installed on the top of the tower body 21 , and the left port of the tee joint 22 is connected by a left elbow 23 Release the cap 24, let the right port of the tee joint 22 connect the arc-shaped pipe 26 through the right elbow 25, and make the port of the arc-shaped pipe 26 face down and combine with the right elbow 25 to form an S shape; The pipe and the air outlet pipe extend into the tower body 21 from the opening at the lower end, wherein the upper end of the release pipe is in the release cap 24, the upper end of the air inlet pipe protrudes from the opening in the middle of the tower body 21, and the upper end of the air outlet pipe is in an arc shape. in tube 26. This structural arrangement can play a supporting and fixing role on the venting tube through the bending direction of the tee joint 22, the left elbow 23 and the venting cap 24, and the upper end of the venting tube can be directly inserted into the venting cap 24, which improves the dismantling of the venting tube. It is convenient for installation, and can prevent rainwater from entering the release tower, which improves safety; through the bending direction of the tee joint 22, the right elbow 25 and the curved pipe 26, the air outlet pipe can be supported and fixed, and the air outlet pipe can be directly The upper end of the air outlet pipe can be inserted into the arc-shaped pipe 26, which improves the convenience of disassembly and assembly of the air outlet pipe, and can prevent rainwater from entering the release tower, thereby improving safety. In practical applications, the present invention usually connects the tee joint 22 with the tower body 21, the left elbow 23 and the right elbow 25 through threads, and makes the release cap 24 and the arc tube 26 correspond to the left elbow 23 through threads. It is connected with the right elbow 25 to improve the convenience of disassembly and assembly, but the tee joint 22, the left elbow 23, the release cap 24, the right elbow 25 and the arc tube 26 are not limited to threaded connections, but also welding etc. other methods. As a specific embodiment, the present invention is provided with a fixed flange 27 at the bottom of the tower body 21 so as to install and fix the tower body 21, and a bellows 28 with an opening on one side is fixed in the middle of the tower body 21, and the upper end of the air inlet pipe is fixed. It is located in the bellows 28 so as to achieve wind gathering through the bellows 28 and improve the ventilation effect. In practical applications, a fan can also be provided in the bellows 28 and connected to the air inlet pipe for forced ventilation. As a specific embodiment, in the present invention, the vent cap 24 is provided with an integrated mouthpiece 241 and a hollow mushroom head 242 , and the bottom wall of the mushroom head 242 is provided with spaced venting holes 243 around the mouthpiece 241 . The release cap 24 of this structure has the characteristics of simple structure, convenient installation and good rainproof effect.

As an optimized solution, in this specific embodiment, a frame 33 with an L-shaped cross-section is fixed on the upper side of the bottom shell 31 of the protective box 3 by screws, a transparent sealing plate 34 is fixed in the frame 33 by screws, and the frame 33 is fixed by screws. A sealing ring is arranged between 33 and the bottom shell 31 and the sealing plate 34, and a protrusion 331 is arranged on the upper end of the frame 33, wherein one end of the box cover 32 is hinged with the frame 33, and the other end of the box cover 32 is between the frame 33. A locking mechanism is provided, and a sealing strip 321 matched with the protrusion 331 is embedded on the lower side of the box cover 32 . This arrangement on the upper end of the bottom case 31 forms a double-layer protection structure composed of a sealing plate 34 and a box cover 32, which enhances safety and reliability. During the inspection, you only need to open the box cover 32 to observe the working state of the pressure regulator 6, shut-off valve 7 and other equipment on the sealing plate 34. At this time, the sealing plate 34 can still play a reliable protective role; The plate 34 can inspect and maintain the equipment such as the pressure regulator 6 and the shut-off valve 7 . In practical application, the present invention also sets through-hole sleeves 35 on the side walls of both ends of the bottom case 31 respectively, so as to pass through the release pipe, the air inlet pipe and the air outlet pipe and achieve sealing; in order to ensure the ventilation effect In the present invention, the air inlet pipe and the air outlet pipe are usually arranged at both ends of the bottom case 31 correspondingly.

As a specific embodiment, the present invention makes the shut-off valve 7 adopt the following structure: including a valve body 71 , a membrane 72 , a sliding sleeve 73 , a guide sleeve 74 , a first spring seat 75 , a valve stem 76 , a valve disc 77 , and a driving spring 78 and balance spring 79, wherein the valve body 71 is sealed and fixed on the pressure regulating box 1, the outer edge of the membrane 72 is sealed and fixedly connected with the valve body 71, and the inner cavity of the valve body 71 is divided into an upper cavity and a lower cavity, and the upper cavity is connected with the valve body 71. The atmosphere is communicated, and the lower cavity is communicated with the air storage tank 4; the sliding sleeve 73 is sealed and fixed in the middle of the film 72, and the inner wall of the sliding sleeve 73 is provided with an inner ring groove; the guide sleeve 74 is sealed and fixed on the valve body 71, and the guide sleeve 74 is in The lower side of the valve body 71 is provided with a first ring platform 741. The upper end of the guide sleeve 74 extends into the sliding sleeve 73. The guide sleeve 74 is provided with a plurality of tapered holes distributed along the circumferential direction. The steel ball 742 matched with the ring groove; the first spring seat 75 is installed in the valve body 71 on the upper side of the sliding sleeve 73 through the adapter; the valve rod 76 passes through the guide sleeve 74, the sliding sleeve 73 and the first spring seat 75, the valve rod There is a sealing ring between 76 and the sliding sleeve 73 and the guide sleeve 74, and the valve stem 76 is provided with an outer ring groove that cooperates with the steel ball 742; The driving spring 78 is sleeved on the guide sleeve 74 and its upper and lower ends are correspondingly pressed on the first ring platform 741 and the valve disc 77; the balance spring 79 is sleeved on the valve stem 76 and its upper and lower ends are correspondingly pressed on the first spring on the seat 75 and the sliding sleeve 73. The shut-off valve 7 of this structure has the characteristics of convenient control, sensitive action, safety and reliability. Under normal working conditions, the air pressure in the secondary pressure chamber 16, the air storage tank 4 and the lower chamber is in a balanced state with the elastic force of the balance spring 79, the film 72 and the sliding sleeve 73 are protected and immobile, at this time, the inner ring groove is in the steel ball 742. At the lower position of the valve, the steel ball 742 is pressed into the outer ring groove, the valve stem 76 is locked, and the driving spring 78 is in an energy storage state; when the air pressure in the secondary pressure chamber 16, the air storage tank 4 and the lower chamber increases, The film 72 and the sliding sleeve 73 move up, and when the air pressure in the secondary pressure chamber 16, the air storage tank 4 and the lower chamber rises to the preset pressure value, the inner ring groove rises with the sliding sleeve 73 to the same height as the steel ball 742 Under the action of the driving spring 78, the steel ball 742 is squeezed into the inner ring groove by the valve rod 76, the valve rod 76 is unlocked, moves down and closes the shut-off valve port 191 through the valve disc 77, thereby realizing the purpose of safe shut-off. After the air pressure is restored to normal or the fault is eliminated, the valve stem 76 can be lifted to reset. The invention improves the stability and reliability of the action on the basis of realizing the pressure taking by connecting the lower cavity of the shut-off valve with the gas storage tank. It should be noted that the structure and working process of the voltage regulator 6 are well known to those skilled in the art, and will not be repeated here.

As a specific embodiment, the present invention makes the valve body 71 adopt a structure of separate design and combined use, which specifically includes an upper valve body 711 and a lower valve body 712 that are fixedly connected by screws, and are installed on the upper port of the upper valve body 711 by screws. The end cover 713 is installed, and a sealing ring is arranged between the end cover 713 and the upper valve body 711 . The guide sleeve 74 is mounted on the lower valve body 712 through threads, a sealing ring is provided between the first ring platform 741 and the lower valve body 712 , and the outer edge of the membrane 72 is pressed between the upper valve body 711 and the lower valve body 712 . The valve body 71 with this arrangement has the characteristics of simple structure, easy preparation, and convenient disassembly and assembly. As an optimized solution, in this specific embodiment, the adapter adopts the following structure: a support seat 751, a second spring seat 752, a support sleeve 753 and a support spring 754, wherein the support seat 751 is clamped in the upper valve body 711, and the first The two-spring seat 752 is screwed into the upper valve body 711 on the upper side of the support seat 751, the lower end of the support sleeve 753 is clamped on the support seat 751 through the second ring platform extending outward, and the support spring 754 is sleeved on the support sleeve 753 The first spring seat 75 is installed in the support sleeve 753 through threads, and the upper end of the sliding sleeve 73 extends into the support seat 751 and the support sleeve 753 . The adapter provided in this way has the advantages of simple structure, convenient disassembly and assembly, flexible adjustment, and strong adaptability. The pre-tightening force of the support spring 754 can be adjusted through the second spring seat 752 to ensure the stability of the structure. The first spring seat 75 can adjust the pre-tightening force of the balance spring 79, which improves the adaptability of the shut-off valve 7, and enhances the stability of the structure by extending the upper end of the sliding sleeve 73 into the support seat 751 and the support sleeve 753 . In practical application, the present invention generally makes the sliding sleeve 73 slide fit with the support base 751 and the support sleeve 753 .

As a specific embodiment, in the present invention, the valve disc 77 is provided with a connecting column 771, a support plate 772 and a blocking ring 773, and the upper end of the connecting column 771 is sleeved on the valve stem 76 through a groove arranged along the central axis, and the two pass through. The pin shaft is connected, a third ring platform is set on the connecting column 771, a third spring seat is set on the connecting column 771 on the upper side of the third ring platform, and the lower end of the driving spring 78 is pressed against the third spring seat; The support plate 772 and the retaining ring 773 are sleeved on the connecting column 771 from bottom to top, so that the support plate 772 adopts a circular truncated structure with a large upper and a small bottom, and the first sealing gasket 774 is clamped on the upper side of the support plate 772 through the sealing groove, And the outer diameter of the sealing groove is larger than the outer diameter of the third ring platform, a second sealing gasket 775 opposite to the shut-off valve port 191 is embedded on the conical surface of the support plate 772, and the blocking ring 773 passes through the pin shaft and the connecting column. 771 connection. The valve flap 77 provided in this structure has the characteristics of convenient disassembly and assembly and strong adaptability. The first sealing gasket 774 is clamped on the upper side of the support plate 772 through the sealing groove, and the outer diameter of the sealing groove is larger than that of the third ring platform. The outer diameter enhances the sealing reliability between the support disc 772 and the third ring platform. Sealing reliability between valve ports 191 . As a specific embodiment, the present invention adopts the following sealing and fixing method for the sliding sleeve 73: a fourth ring platform is arranged at the lower end of the sliding sleeve 73, a pressure plate 731 and a compression nut 732 are sleeved on the sliding sleeve 73, and the compression The nut 732 is screwed with the sliding sleeve 73 , wherein the inner edge of the membrane 72 is squeezed between the fourth ring platform and the pressure plate 731 . This arrangement has the characteristics of simple structure, convenient disassembly and assembly, and good sealing effect.

The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of protection of the present invention. Without departing from the design concept of the present invention, those skilled in the art can make various Deformations shall fall within the protection scope determined by the claims of the present invention.

Claims (9)

1. A gas pressure regulating system, comprising a pressure regulating box (1) buried in the ground and a release tower (2) fixed on the ground, and a protective box (3) exposed to the ground is sealed and fixed on the pressure regulating box (1), The protective box (3) comprises a bottom shell (31) and a box cover (32) hinged on the bottom shell (31), characterized in that the inner cavity of the pressure regulating box (1) passes through a first partition (11) It is divided into an intake chamber (12) and a pressure regulating chamber, and the pressure regulating chamber is divided into a primary pressure chamber (15) and a secondary pressure chamber (16) by the second partition plate (13) and the third partition plate (14), The third partition plate (14) is provided with a pressure regulating valve port (141), and the secondary pressure chamber (16) is sequentially connected to the air storage tank (4) and the release valve (5) in the protective box (3) through pipelines. ), the left and right sides of the surge tank (1) are correspondingly provided with an intake pipe (17) and an exhaust pipe (18) communicating with the intake chamber (12) and the secondary pressure chamber (16). A communication pipe (19) is fixed, the upper end of the communication pipe (19) is provided with a shut-off valve port (191), the lower end of the communication pipe (19) is communicated with the primary pressure chamber (15), and the pressure regulating box (1) is sealed and fixed There are a pressure regulator (6) and a shut-off valve (7) in the protective box (3), the pressure regulator (6) is used to control the size of the pressure regulating valve port (141), and the shut-off valve (7) is used when the two When the air pressure in the stage pressure chamber (16) rises to a preset pressure value, the shut-off valve port (191) is closed, and the release tower (2) is provided with a release pipe, an air inlet pipe and an air outlet pipe. The release valve (5) is connected, and the air inlet pipe and the air outlet pipe are respectively communicated with the inner cavity of the protective box (3); the upper side of the bottom shell (31) is fixed by screws with a frame (33) with an L-shaped cross section on one side. ), a transparent sealing plate (34) is fixed in the frame (33) by screws, a sealing ring is provided between the frame (33) and the bottom case (31) and the sealing plate (34), and the upper end of the frame (33) is provided with Protrusion (331), one end of the box cover (32) is hinged with the frame (33), a locking mechanism is provided between the other end of the box cover (32) and the frame (33), and the lower side of the box cover (32) is embedded A sealing strip (321) matched with the protrusion (331) is provided. 2 . The gas pressure regulating system according to claim 1 , wherein a support plate ( 192 ) is fixed in the intake chamber ( 12 ), and the communication pipe ( 19 ) passes through the support plate ( 192 ). 3 . ) and make the two sealed and fixedly connected, the lower end of the communication pipe (19) is sealed and fixedly connected with the first partition (11), the outer periphery of the communication pipe (19) is sleeved with a filter cartridge (8), and the filter cartridge (8) is The upper and lower ends are correspondingly pressed against the pressure regulating box (1) and the support plate (192). 3. A gas pressure regulating system according to claim 2, characterized in that the release tower (2) comprises a hollow tower body (21), and a tee joint (22) is installed on the top of the tower body (21) , the left port of the tee joint (22) is connected with a vent cap (24) through a left elbow (23), and the right port of the tee joint (22) is connected with an arc tube (26) through a right elbow (25), The port of the arc-shaped pipe (26) faces downward and is combined with the right curved pipe (25) to form an S shape. The upper end is in the release cap (24), the upper end of the air inlet pipe protrudes from the opening in the middle of the tower body (21), and the upper end of the air outlet pipe is in the arc-shaped pipe (26). 4. A gas pressure regulating system according to claim 3, characterized in that, the bottom of the tower body (21) is provided with a fixed flange (27), and the middle of the tower body (21) is fixed with a side opening. The bellows (28), the upper end of the air inlet pipe is located in the bellows (28), the venting cap (24) includes an integrated mouthpiece (241) and a hollow mushroom head (242), the bottom wall of the mushroom head (242) is in the bellows (28). Dispersion holes (243) distributed at intervals are arranged around the mouthpiece (241). 5 . The gas pressure regulating system according to claim 2 , wherein the shut-off valve ( 7 ) comprises a valve body ( 71 ), a membrane ( 72 ), a sliding sleeve ( 73 ), and a guide sleeve ( 74 ). 6 . , the first spring seat (75), the valve stem (76), the valve disc (77), the drive spring (78) and the balance spring (79), the valve body (71) is sealed and fixed on the pressure regulating box (1), and the membrane The outer edge of (72) is sealed and fixedly connected with the valve body (71) and the inner cavity of the valve body (71) is divided into an upper cavity and a lower cavity, the upper cavity is communicated with the atmosphere, and the lower cavity is communicated with the gas storage tank (4), The sliding sleeve (73) is sealed and fixed in the middle of the film (72), the inner wall of the sliding sleeve (73) is provided with an inner ring groove, the guide sleeve (74) is sealed and fixed on the valve body (71), and the guide sleeve (74) is located on the valve body (71). A first ring platform (741) is arranged on the lower side of the valve body (71), the upper end of the guide sleeve (74) extends into the sliding sleeve (73), and the guide sleeve (74) is provided with a plurality of cones distributed along the circumferential direction A steel ball (742) matched with the inner ring groove is arranged in the tapered hole, the first spring seat (75) is installed in the valve body (71) through the adapter, and the valve stem (76) passes through the guide sleeve (74) ), the sliding sleeve (73) and the first spring seat (75), a sealing ring is provided between the valve stem (76), the sliding sleeve (73) and the guide sleeve (74), and the valve stem (76) is provided with a steel ball (742) is matched with the outer ring groove, the valve disc (77) is installed on the lower end of the valve stem (76) and is opposite to the shut-off valve port (191), the driving spring (78) is sleeved on the guide sleeve (74) and makes it The upper and lower ends are correspondingly pressed against the first ring platform (741) and the valve disc (77), and the balance spring (79) is sleeved on the valve stem (76) and its upper and lower ends are pressed against the first spring seat (75) correspondingly. and sliding sleeve (73). 6 . The gas pressure regulating system according to claim 5 , wherein the valve body ( 71 ) comprises an upper valve body ( 711 ) and a lower valve body ( 712 ) fixedly connected by screws, and the upper valve body An end cover (713) is installed on the upper port of (711) through threads, a sealing ring is provided between the end cover (713) and the upper valve body (711), and the guide sleeve (74) is installed on the lower valve body (712) through threads ), a sealing ring is arranged between the first ring platform (741) and the lower valve body (712), and the outer edge of the membrane (72) is pressed against the upper valve body (711) and the lower valve body (712) between. 7. The gas pressure regulating system according to claim 6, wherein the adapter comprises a support seat (751), a second spring seat (752), a support sleeve (753) and a support spring (754) ), the support seat (751) is clamped in the upper valve body (711), the second spring seat (752) is installed in the upper valve body (711) through threads, and the lower end of the support sleeve (753) passes through the outwardly extending first spring seat (752). The second ring platform is clamped on the support seat (751), the support spring (754) is sleeved on the support sleeve (753) and its upper and lower ends are pressed against the second spring seat (752) and the second ring platform, so The first spring seat (75) is installed in the support sleeve (753) through threads, and the upper end of the sliding sleeve (73) extends into the support seat (751) and the support sleeve (753). 8 . The gas pressure regulating system according to claim 5 , wherein the valve flap ( 77 ) comprises a connecting column ( 771 ), a support plate ( 772 ) and a retaining ring ( 773 ), and the connecting column ( 771 ) The upper end of ) is sleeved on the valve stem (76) through a groove arranged along the central axis and the two are connected by a pin. The connecting column (771) is provided with a third ring platform, and the connecting column on the upper side of the third ring platform (771) is sleeved with a third spring seat, the lower end of the driving spring (78) is pressed against the third spring seat, and the support plate (772) and the retaining ring (773) are sleeved on the connecting post (771) from bottom to top , the support plate (772) is in the shape of a circular truncated cone, the upper side of the support plate (772) is clamped with a first sealing gasket (774) through a sealing groove, and the outer diameter of the sealing groove is larger than the outer diameter of the third ring platform , a second gasket (775) opposite to the shut-off valve port (191) is embedded on the conical surface of the support plate (772), and the retaining ring (773) is connected to the connecting column (771) through a pin. 9 . The gas pressure regulating system according to claim 5 , wherein a fourth ring platform is provided at the lower end of the sliding sleeve ( 73 ), and a pressure plate ( 731 ) is sleeved on the sliding sleeve ( 73 ). 10 . and a compression nut (732), the compression nut (732) is screwed with the sliding sleeve (73), and the inner edge of the membrane (72) is squeezed between the fourth ring platform and the pressure plate (731).

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