CN114060726B

CN114060726B - Gas pressure regulating system

Info

Publication number: CN114060726B
Application number: CN202111354270.9A
Authority: CN
Inventors: 林天齐; 高晨思聪; 林元文; 王丁涛; 肖云选; 洪成; 蒋谢斌; 陈道锭
Original assignee: Zhejiang Cangnan Instrument Group Dongxing Energy Technology Co ltd
Current assignee: Zhejiang Cangnan Instrument Group Dongxing Energy Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-08-23
Anticipated expiration: 2041-11-16
Also published as: CN114060726A

Abstract

The invention relates to a gas pressure regulating system, which comprises a pressure regulating box, a bleeding tower and a protective box, wherein the inner cavity of the pressure regulating box is divided into an air inlet chamber and a pressure regulating chamber by a first partition plate, the pressure regulating chamber is divided into a primary pressure chamber and a secondary pressure chamber by a second partition plate and a third partition plate, the third partition plate is provided with a pressure regulating valve port, the secondary pressure chamber is connected with an air storage tank and a bleeding valve, a communicating pipe is fixed in the air inlet chamber, the upper end of the communicating pipe is provided with a cutting valve port, the lower end of the communicating pipe is communicated with the primary pressure chamber, the pressure regulating box is fixedly provided with a pressure regulator and a cutting valve in a sealing way, the pressure regulator is used for controlling the size of the pressure regulating valve port, the cutting valve is used for closing the cutting valve port when the air pressure in the secondary pressure chamber is increased to a preset pressure value, the bleeding tower is provided with a bleeding pipe, the air inlet pipe and the air outlet pipe are communicated with the inner cavity of the protective box. The device has the advantages of simple structure, convenience in maintenance, good safety, high reliability and strong adaptability.

Description

Gas pressure regulating system

Technical Field

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

Background

Along with the development of science and technology and society, the gas pipe network adopts the arrangement mode of burying pressure regulating box in the underground (buried pressure regulating box for short) more and more to save ground space, improve the security, and set up the protective housing on pressure regulating box, so that protect various equipment on the pressure regulating box. However, the existing buried pressure regulating box 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, fuel gas is easy to accumulate due to leakage, on one hand, the accident risk is increased, and on the other hand, the damage to maintenance personnel can be caused; 2. the arrangement of the diffusing pipe is not standard, and the diffusing effect is influenced.

Disclosure of Invention

The invention aims to provide a gas pressure regulating system which has the advantages of simple structure, convenience in maintenance, good safety, high reliability and strong adaptability.

In order to solve the problems in the prior art, the invention provides a fuel gas pressure regulating system, which comprises a pressure regulating box buried underground and a bleeding tower fixed on the ground, wherein the pressure regulating box is fixedly sealed with a protective box exposed out of the ground, the protective box comprises a bottom shell and a box cover hinged on the bottom shell, the inner cavity of the pressure regulating box is divided into an air inlet chamber and a pressure regulating chamber by a first partition plate, the pressure regulating chamber is divided into a first-stage pressure chamber and a second-stage pressure chamber by a second partition plate and a third partition plate, the third partition plate is provided with a pressure regulating valve port, the second-stage pressure chamber is sequentially connected with an air storage tank and a bleeding valve in the protective box by pipelines, the left side and the right side of the pressure regulating box are correspondingly provided with an air inlet pipe and an air outlet pipe communicated with the air inlet chamber and the second-stage pressure chamber, a communicating pipe is fixed in the air inlet chamber, the upper end of the communicating pipe is provided with a cutting-off valve port, the lower end of the communicating pipe is communicated with the first-stage pressure chamber, and the pressure regulator and a cut-off valve in the protective box are fixedly sealed on the pressure regulating box, the pressure regulator is used for controlling the size of pressure regulating valve port, and the trip valve is used for sealing when the atmospheric pressure in the secondary pressure chamber risees to predetermined pressure value and cuts off the valve port, be equipped with diffuse pipe, air-supply line and play tuber pipe on the tower of diffusing, diffuse the pipe and be connected with the diffuse valve, air-supply line and play tuber pipe communicate with the inner chamber of guard box respectively.

Further, the gas pressure regulating system is characterized in that a support plate is fixed in the gas inlet chamber, the communicating pipe penetrates through the support plate and enables the support plate and the communicating pipe to be fixedly connected in a sealing mode, the lower end of the communicating pipe is fixedly connected with the first partition plate in a sealing mode, a filter cartridge is sleeved on the periphery of the communicating pipe, and the upper end and the lower end of the filter cartridge are correspondingly pressed against the pressure regulating box and the support plate.

Further, the invention relates to a gas pressure regulating system, wherein the diffusing tower comprises a hollow tower body, a three-way joint is installed at the top of the tower body, a left port of the three-way joint is connected with a diffusing cap through a left bent pipe, a right port of the three-way joint is connected with an arc-shaped pipe through a right bent pipe, a port of the arc-shaped pipe faces downwards and is combined with the right bent pipe to form an S shape, the diffusing pipe, an air inlet pipe and an air outlet pipe extend into the tower body from an opening at the lower end, the upper end of the diffusing pipe is located in the diffusing cap, the upper end of the air inlet pipe extends out from an opening in the middle of the tower body, and the upper end of the air outlet pipe is located in the arc-shaped pipe.

Further, the invention relates to a gas pressure regulating system, wherein a fixed flange is arranged at the bottom of the tower body, an air box with one side opened is fixed in the middle of the tower body, the upper end of an air inlet pipe is positioned in the air box, the diffusing cap comprises an integrated interface pipe and a hollow mushroom head, and diffusing holes distributed at intervals are formed in the bottom wall of the mushroom head around the interface pipe.

Further, the gas pressure regulating system is characterized in that a frame with a single-side section in an L shape is fixed on the upper side of the bottom shell through screws, a transparent sealing plate is fixed in the frame through screws, a sealing ring is arranged between the frame and the bottom shell as well as between the frame and the sealing plate, a bulge is arranged at the upper end of the frame, one end of the box cover is hinged with the frame, a locking mechanism is arranged between the other end of the box cover and the frame, and a sealing strip matched with the bulge is embedded in the lower side surface of the box cover.

Further, the invention relates to a gas pressure regulating system, wherein the cut-off valve comprises a valve body, a membrane, a sliding sleeve, a guide sleeve, a first spring seat, a valve rod, a valve clack, a driving spring and a balance spring, the valve body is fixed on a pressure regulating box in a sealing way, the outer edge of the membrane is fixedly connected with the valve body in a sealing way and divides the inner cavity of the valve body into an upper cavity and a lower cavity, the upper cavity is communicated with the atmosphere, the lower cavity is communicated with an air storage tank, the sliding sleeve is fixed in the middle of the membrane in a sealing way, an inner ring groove is arranged on the inner wall of the sliding sleeve, the guide sleeve is fixed on the valve body in a sealing way, a first ring platform is arranged at the lower side of the valve body, the upper end of the guide sleeve extends into the sliding sleeve, a plurality of tapered holes are circumferentially distributed on the guide sleeve, steel balls matched with the inner ring groove are arranged in the tapered holes, the first spring seat is installed in the valve body through an adapter, the valve rod penetrates through the guide sleeve, the sliding sleeve and the first spring seat, a sealing ring is arranged between the valve rod and the sliding sleeve and the guide sleeve, the valve rod is provided with an outer ring groove matched with the steel ball, the valve clack is arranged at the lower end of the valve rod and is opposite to the cut-off valve port, the driving spring is sleeved on the guide sleeve and enables the upper end and the lower end of the driving spring to be correspondingly pressed on the first ring platform and the valve clack, and the balancing spring is sleeved on the valve rod and enables the upper end and the lower end of the balancing spring to be correspondingly pressed on the first spring seat and the sliding sleeve.

Further, the gas pressure regulating system comprises an upper valve body and a lower valve body which are fixedly connected through screws, an end cover is installed at the upper port of the upper valve body through threads, a sealing ring is arranged between the end cover and the upper valve body, a guide sleeve is installed on the lower valve body through threads, the sealing ring is arranged between a first annular table and the lower valve body, and the outer edge of the sealing ring is extruded between the upper valve body and the lower valve body.

Further, the invention relates to a gas pressure regulating system, wherein the adaptor comprises a supporting seat, a second spring seat, a supporting sleeve and a supporting spring, the supporting seat is clamped in the upper valve body, the second spring seat is installed in the upper valve body through threads, the lower end of the supporting sleeve is clamped on the supporting seat through a second annular table extending outwards, the supporting spring is sleeved on the supporting sleeve, the upper end and the lower end of the supporting spring are correspondingly pressed on the second spring seat and the second annular table, the first spring seat is installed in the supporting sleeve through threads, and the upper end of the sliding sleeve extends into the supporting seat and the supporting sleeve.

Furthermore, the invention relates to a gas pressure regulating system, wherein the valve clack comprises a connecting column, a supporting disk and a baffle ring, the upper end of the connecting column is sleeved on the valve rod through a groove arranged along the central axis and is connected with the valve rod through a pin shaft, a third annular table is arranged on the connecting column, a third spring seat is sleeved on the connecting column on the upper side of the third annular table, the lower end of a driving spring is pressed on the third spring seat, the supporting disk and the baffle ring are sleeved on the connecting column from bottom to top, the supporting disk is in a circular table shape with a large upper part and a small lower part, a first sealing gasket is clamped on the upper side surface of the supporting disk through a sealing groove, the outer diameter of the sealing groove is larger than the outer diameter of the third annular table, a second sealing gasket opposite to a cut-off valve port is embedded on the conical surface of the supporting disk, and the baffle ring is connected with the connecting column through a pin shaft.

Further, 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 in threaded fit with the sliding sleeve, and the inner edge of the leather membrane is extruded between the fourth ring platform and the pressure plate.

Compared with the prior art, the gas pressure regulating system has the following advantages: the invention is through setting up the pressure regulating box buried in the underground and fixing the diffusing tower on the ground, seal the protective box fixedly exposing the ground on the pressure regulating box, let the protective box set up the drain pan and articularly connect to the case lid on the drain pan, wherein, the cavity of the pressure regulating box is divided into air inlet chamber and pressure regulating chamber through the first baffle, the pressure regulating chamber is divided into first class pressure chamber and second class pressure chamber through the second baffle and third baffle, there are pressure regulating valve ports on the third baffle, the second class pressure chamber connects with air reservoir and diffusion valve in the protective box sequentially through the pipeline, the left and right sides of the pressure regulating box are equipped with air inlet pipe and air outlet duct communicated with air inlet chamber and second class pressure chamber correspondingly, fixed with the communicating pipe in the air inlet chamber, the upper end of the communicating pipe has cut-off valve ports, the bottom end of the communicating pipe communicates with first class pressure chamber; a pressure regulator and a stop valve which are positioned in the protective box are fixed on the pressure regulating box in a sealing way, wherein the pressure regulator is used for controlling the size of the pressure regulating valve port, and the stop valve is used for closing and cutting off the valve port when the air pressure in the secondary pressure cavity is increased to a preset pressure value; the diffusing tower is provided with a diffusing pipe, an air inlet pipe and an air outlet pipe, wherein the diffusing pipe penetrates through the side wall of the protective box and is connected with a diffusing valve, and the air inlet pipe and the air outlet pipe are respectively communicated with the inner cavity of the protective box. Therefore, the gas pressure regulating system with simple structure, convenient maintenance, good safety, high reliability and strong adaptability is formed, in practical application, the gas inlet pipe and the gas outlet pipe are correspondingly and hermetically connected with the upstream gas conveying pipe and the downstream gas conveying pipe, and the purpose of pressure regulation can be realized by controlling the size of the pressure regulating valve port through the pressure regulator in the process that gas flows through the pressure regulating box. The pressure regulating box is divided into an air inlet chamber, a primary pressure chamber and a secondary pressure chamber by the first partition plate, the second partition plate and the third partition plate, the communicating pipe is fixed in the air inlet chamber, and the pressure regulating valve port and the cut-off valve port are correspondingly arranged on the third partition plate and the communicating pipe, so that the straight-through buried pressure regulating box is formed; by arranging the air storage tank and the bleeding valve which are connected with the secondary pressure cavity, on one hand, the stability of downstream air supply is improved through the buffering and pressure stabilizing function of the air storage tank, and on the other hand, the safety is improved through the overpressure bleeding function of the bleeding valve; the pressure regulator and the cut-off valve are sealed and fixed on the pressure regulating box by adopting a modularized mounting mode, so that the convenience of disassembly, assembly and maintenance is improved, when the pressure regulator or the cut-off valve breaks down, the pressure regulator or the cut-off valve only needs to be disassembled and replaced, on one hand, the normal operation of a gas pipe network is ensured, on the other hand, the old pressure regulator or the cut-off valve can be sent to a factory for maintenance, the purposes of quick maintenance and repair are realized, when the air pressure in the secondary pressure cavity is increased to a preset pressure value due to accidents, the cut-off valve is closed to cut off a valve port, and the safety is enhanced; by arranging the protective box, on one hand, the protective box can effectively protect equipment such as the gas storage tank, the bleeding valve, the pressure regulator, the cut-off valve and the like, so that the safety and reliability of the equipment are improved, on the other hand, the equipment can be checked and maintained by opening the protective box, so that the convenience of operation is improved; through setting up the diffusing tower, improved the standardization of arranging diffusing pipe, air-supply line and play tuber pipe, can arrange the gas that the valve of diffusing discharged to aerial through setting up diffusing pipe, guaranteed the effect of diffusing, made the protective housing realize the ventilation function through setting up the air-supply line and going out the tuber pipe, can effectively avoid causing the gas to gather in the protective housing because of leaking, improved the security.

The gas pressure regulating system according to the present invention will be described in detail with reference to the embodiments shown in the drawings.

Drawings

FIG. 1 is a front view of a gas pressure regulation system of the present invention;

FIG. 2 is an isometric view of a gas pressure regulating system of the present invention;

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

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

FIG. 5 is an isometric view of a pressure regulating tank and guard box combination in a gas pressure regulating system of the present invention;

FIG. 6 is a view taken along line A-A of FIG. 4;

FIG. 7 is a front view of a pressure regulating tank in a gas pressure regulating system according to the present invention;

FIG. 8 is a top view of a pressure regulating tank in a gas pressure regulating system according to the present invention;

FIG. 9 is an isometric view of a pressure regulating tank in a gas pressure regulating system of the present invention;

FIG. 10 is a view taken along line C-C of FIG. 8;

FIG. 11 is an enlarged view of a portion of FIG. 6 at position B;

FIG. 12 is an enlarged view of a portion of FIG. 10 at position D;

FIG. 13 is a front view of a stack of a fuel gas pressure regulating system of the present invention;

FIG. 14 is a rear view of a stack of a fuel gas pressure regulating system of the present invention;

FIG. 15 is an isometric view of a stack in a gas pressure regulation system of the present invention;

FIG. 16 is a front view of a diffuser cap in a gas pressure regulating system of the present invention;

FIG. 17 is a view from E-E in FIG. 16;

FIG. 18 is a bottom view of a diffuser cap of a gas pressure regulating system of the present invention;

FIG. 19 is an isometric view of a diffuser cap in a gas pressure regulating system of the present invention.

Detailed Description

First, it should be noted that, the directional terms such as up, down, left, right, front, rear, etc. described in the present invention are only described with reference to the accompanying drawings for easy understanding, and do not limit the technical solution and the claimed scope of the present invention.

As shown in fig. 1 to 19, the embodiment of the gas pressure regulating system of the present invention comprises a pressure regulating tank 1 buried underground and a diffusion tower 2 fixed on the ground, a protective tank 3 sealed and fixed on the pressure regulating tank 1 and exposed to the ground, the protective tank 3 having a bottom shell 31 and a tank cover 32 hinged on the bottom shell 31, wherein the inner cavity of the pressure regulating tank 1 is divided into an inlet chamber 12 and a pressure regulating chamber by a first partition 11, the pressure regulating chamber is divided into a first-stage pressure chamber 15 and a second-stage pressure chamber 16 by a second partition 13 and a third partition 14, the third partition 14 has a pressure regulating valve port 141, the second-stage pressure chamber 16 is sequentially connected with an air storage tank 4 and a diffusion valve 5 in the protective tank 3 by a pipeline, the left and right sides of the pressure regulating tank 1 are correspondingly provided with an inlet chamber 17 and an outlet tube 18 communicated with the inlet chamber 12 and the second-stage pressure chamber 16, the inlet chamber 12 has a communicating tube 19 fixed therein, the upper end of the communicating tube 19 has a cut-off valve port 191, the lower end of the communication pipe 19 communicates with the primary pressure chamber 15. A pressure regulator 6 and a shut-off valve 7 are hermetically fixed in the protective box 3 on the pressure regulating box 1, wherein the pressure regulator 6 is used for controlling the size of the pressure regulating valve port 141, and the shut-off valve 7 is used for sealing the shut-off valve port 191 when the air pressure in the secondary pressure chamber 16 is increased to a preset pressure value. The diffusing tower 2 is provided with a diffusing pipe, an air inlet pipe and an air outlet pipe, wherein the diffusing pipe is connected with a diffusing valve 5, and the air inlet pipe and the air outlet pipe are respectively communicated with the inner cavity of the protective box 3.

Through the structure, the gas pressure regulating system with simple structure, convenient maintenance, good safety, high reliability and strong adaptability is formed, in practical application, the gas inlet pipe 17 and the gas outlet pipe 18 are correspondingly and hermetically connected with an upstream gas conveying pipe and a downstream gas conveying pipe, and the pressure regulating purpose can be realized by controlling the size of the pressure regulating valve port 141 through the pressure regulator 6 in the process that gas flows through the pressure regulating box 1. The invention divides the pressure regulating box 1 into an air inlet chamber 12, a primary pressure chamber 15 and a secondary pressure chamber 16 through a first clapboard 11, a second clapboard 13 and a third clapboard 14, fixes a communicating pipe 19 in the air inlet chamber 12, and correspondingly arranges a pressure regulating valve port 141 and a cutting valve port 191 on the third clapboard 14 and the communicating pipe 19 to form a straight-through type buried pressure regulating box. Through setting up gas holder 4 and the bleeder valve 5 of being connected with secondary pressure chamber 16, the stability of the low reaches air feed has been improved through the buffering steady voltage effect of gas holder 4 on the one hand, and the on the other hand has improved the security through the superpressure bleeder effect of bleeder valve 5. Through adopting on the modular mounting means is with voltage regulator 6 and the sealed fixed pressure regulating box 1 of trip valve 7, the dismouting has been improved, the convenience of maintenance, when voltage regulator 6 or trip valve 7 broke down, only need pull down it change can, the normal operating of gas pipe net has been guaranteed on the one hand, on the other hand can send old voltage regulator or trip valve to the factory maintenance, quick maintenance has been realized, the purpose of maintenance, make trip valve 7 seal when the atmospheric pressure in the second grade pressure chamber 16 rises to predetermined pressure value (safe value) because of the accident and cut off valve port 191, the security has been strengthened. Through setting up protective housing 3, can play effectual guard action to equipment such as gas holder 4, bleeding valve 5, voltage regulator 6, trip valve 7 on the one hand, improve the fail safe nature of equipment, on the other hand accessible is opened protective housing 3 and is examined, is maintained equipment, has improved the convenience of operation. Through setting up diffusing tower 2, improved the standardization of arranging diffusing pipe, air-supply line and play tuber pipe, can arrange the gas that diffuses valve 5 and let out to air through setting up diffusing pipe, guaranteed the effect of diffusing, make protective housing 3 realize the ventilation function through setting up the air-supply line and going out the tuber pipe, can effectively avoid causing the gas to gather in protective housing 3 because of leaking, improved the security. In practical applications, the present invention usually adopts a welded structure for the pressure regulating box 1 to ensure structural stability and sealing reliability.

As a specific embodiment, the present invention employs the following fixing method for the communication pipe 19: the support plate 192 is fixed to the intake chamber 12, the communicating pipe 19 is passed through the support plate 192 to be sealingly and fixedly connected to the support plate 192, and the lower end of the communicating pipe 19 is sealingly and fixedly connected to the first partition plate 11. Meanwhile, in the present embodiment, the filter cartridge 8 is sleeved on the periphery of the communication pipe 19, and the upper end and the lower end of the filter cartridge 8 are correspondingly pressed against the pressure regulating tank 1 and the supporting plate 192. This structure setting has improved the firm reliability of support through backup pad 192, can effectively filter the impurity in the gas through cartridge filter 8, has improved the gas quality after the pressure regulating and terminal customer's gas safety. In practical applications, the present invention generally employs a welding sealing fixing direction for the communication pipe 19, the support plate 192 and the first partition plate 11, and provides sealing rings at the upper and lower ends of the filter cartridge 8 to improve the sealing reliability. To ensure stability in the supported and buried condition, the present invention typically secures the surge tank 1 to the support frame 9.

As an optimized scheme, the present embodiment adopts the following structure for the diffusion tower 2: the method comprises the following steps that a hollow tower body 21 is arranged, a three-way joint 22 is installed at the top of the tower body 21, the left end opening of the three-way joint 22 is connected with a diffusing cap 24 through a left bent pipe 23, the right end opening of the three-way joint 22 is connected with an arc-shaped pipe 26 through a right bent pipe 25, and the end opening of the arc-shaped pipe 26 faces downwards and is combined with the right bent pipe 25 to form an S shape; the diffusing pipe, the air inlet 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 diffusing pipe is positioned in the diffusing cap 24, the upper end of the air inlet pipe extends out from the opening at the middle part of the tower body 21, and the upper end of the air outlet pipe is positioned in the arc-shaped pipe 26. The structure can support and fix the diffusing pipe through the bending directions of the three-way joint 22, the left bent pipe 23 and the diffusing cap 24, and the upper end of the diffusing pipe is directly inserted into the diffusing cap 24, so that the convenience of disassembling and assembling the diffusing pipe is improved, rainwater can be prevented from entering the diffusing tower, and the safety is improved; the bending trend of the three-way joint 22, the right bent pipe 25 and the arc-shaped pipe 26 can support and fix the air outlet pipe, the upper end of the air outlet pipe is directly inserted into the arc-shaped pipe 26, the convenience of air outlet pipe disassembly and assembly is improved, rainwater can be prevented from entering the diffusing tower, and the safety is improved. In practical applications, the three-way joint 22 is usually connected to the tower body 21, the left elbow 23 and the right elbow 25 through threads, and the diffusing cap 24 and the arc-shaped tube 26 are correspondingly connected to the left elbow 23 and the right elbow 25 through threads, so as to improve the convenience of assembly and disassembly, but the three-way joint 22, the left elbow 23, the diffusing cap 24, the right elbow 25 and the arc-shaped tube 26 are not limited to be connected through threads, and may also be connected through welding or other manners. As a specific embodiment, the present invention is provided with a fixed flange 27 at the bottom of the tower body 21 for mounting the tower body 21, and a wind box 28 with one side opened is fixed at the middle of the tower body 21, and the upper end of the air inlet pipe is positioned in the wind box 28, so that the wind collection is realized by the wind box 28 to improve the ventilation effect. In practice, a fan may also be provided in the air box 28 and connected to the air inlet duct for forced ventilation. As a specific embodiment, the present invention provides the diffusion cap 24 with an integral mouthpiece 241 and hollow mushroom head 242, and provides the bottom wall of the mushroom head 242 with spaced-apart diffusion holes 243 around the mouthpiece 241. The diffusing cap 24 with the structure has the characteristics of simple structure, convenient installation and good rainproof effect.

As an optimized scheme, in the present embodiment, a frame 33 with an L-shaped single-sided cross section is fixed on the upper side of bottom case 31 of protection box 3 by screws, a transparent sealing plate 34 is fixed in frame 33 by screws, a sealing ring is arranged between frame 33 and bottom case 31 and sealing plate 34, a protrusion 331 is arranged at the upper end of frame 33, wherein one end of box cover 32 is hinged to frame 33, a locking mechanism is arranged between the other end of box cover 32 and frame 33, and a sealing strip 321 matched with protrusion 331 is embedded in the lower side surface of box cover 32. This arrangement forms a double protection structure formed by the sealing plate 34 and the lid 32 at the upper end of the bottom case 31, thereby enhancing safety and reliability, and enhancing sealing and waterproof effects by providing the protrusions 331 and the sealing strips 321 which are engaged with each other. During patrol, the sealing plate 34 can observe the working states of the equipment such as the pressure regulator 6, the cut-off valve 7 and the like only by opening the box cover 32, and the sealing plate 34 still can play a reliable protection role; when a fault occurs, the sealing plate 34 is removed, and the equipment such as the pressure regulator 6, the shut-off valve 7 and the like can be inspected and maintained. In practical application, the invention further arranges through-hole sleeves 35 on the side walls of two ends of the bottom shell 31 respectively so as to facilitate the penetration of the diffusing pipe, the air inlet pipe and the air outlet pipe and realize sealing; in order to ensure ventilation effect, the air inlet pipe and the air outlet pipe are generally disposed at two ends of the bottom shell 31.

As a specific embodiment, the invention adopts the following structure arrangement for the stop valve 7: the valve comprises a valve body 71, a membrane 72, a sliding sleeve 73, a guide sleeve 74, a first spring seat 75, a valve rod 76, a valve clack 77, a driving spring 78 and a balance spring 79, wherein the valve body 71 is fixed on the pressure regulating box 1 in a sealing manner, the outer edge of the membrane 72 is fixedly connected with the valve body 71 in a sealing manner and divides the inner cavity of the valve body 71 into an upper cavity and a lower cavity, the upper cavity is communicated with the atmosphere, and the lower cavity is communicated with an air storage tank 4; the sliding sleeve 73 is fixed in the middle of the leather membrane 72 in a sealing way, and an inner annular groove is formed in the inner wall of the sliding sleeve 73; the guide sleeve 74 is fixed on the valve body 71 in a sealing manner, a first annular platform 741 is arranged at the lower side of the valve body 71 of the guide sleeve 74, the upper end of the guide sleeve 74 extends into the sliding sleeve 73, a plurality of tapered holes distributed along the circumferential direction are formed in the guide sleeve 74, and steel balls 742 matched with the inner annular groove are arranged in the tapered holes; the first spring seat 75 is installed in the valve body 71 on the upper side of the sliding sleeve 73 through an adapter; the valve rod 76 passes through the guide sleeve 74, the sliding sleeve 73 and the first spring seat 75, a sealing ring is arranged between the valve rod 76 and the sliding sleeve 73 as well as between the valve rod 76 and the guide sleeve 74, and an outer annular groove matched with the steel ball 742 is arranged on the valve rod 76; the valve flap 77 is installed at the lower end of the valve stem 76 and is disposed opposite to the shut-off valve port 191; the driving spring 78 is sleeved on the guide sleeve 74 and enables the upper end and the lower end of the driving spring to correspondingly push against the first annular table 741 and the valve clack 77; the balance spring 79 is sleeved on the valve rod 76 and enables the upper end and the lower end of the balance spring to be correspondingly pressed on the first spring seat 75 and the sliding sleeve 73. The shut-off valve 7 with the structure has the characteristics of convenient control, sensitive action, safety and reliability. Under normal working conditions, the air pressure in the secondary pressure cavity 16, the air storage tank 4 and the lower cavity and the elastic force of the balance spring 79 are in a balanced state, the membrane 72 and the sliding sleeve 73 are protected and fixed, at the moment, the inner annular groove is positioned at the lower side position of the steel ball 742, the steel ball 742 is pressed into the outer annular groove, the valve rod 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 rises, the membrane 72 and the sliding sleeve 73 move upwards, when the air pressure in the secondary pressure chamber 16, the air storage tank 4 and the lower chamber rises to a preset pressure value, the inner annular groove rises to the position same as the steel ball 742 along with the sliding sleeve 73, the steel ball 742 is extruded into the inner annular groove by the valve rod 76 under the action of the driving spring 78, the valve rod 76 is unlocked and moves downwards, the valve port 191 is closed and cut off through the valve clack 77, and therefore the safety cut-off purpose is achieved. After the air pressure is recovered to normal or the fault is eliminated, the valve rod 76 is lifted upwards to reset. The lower cavity of the cut-off valve is communicated with the gas storage tank, so that the stability and the reliability of the action are improved on the basis of realizing pressure tapping. It should be noted that the structure and operation of the voltage regulator 6 are well known to those skilled in the art, and will not be described herein.

In the present invention, the valve body 71 is designed and combined as a separate body, and specifically includes an upper valve body 711 and a lower valve body 712 fixedly connected by screws, an end cap 713 is screwed to an upper port of the upper valve body 711, and a seal ring is disposed between the end cap 713 and the upper valve body 711. The guide sleeve 74 is screwed to the lower valve body 712, a seal ring is provided between the first annular seat 741 and the lower valve body 712, and the outer edge of the coating 72 is pressed between the upper valve body 711 and the lower valve body 712. The valve body 71 has the characteristics of simple structure, easy preparation and convenient disassembly and assembly. As an optimized scheme, the present embodiment makes the adaptor adopt the following structure: the valve comprises a supporting seat 751, a second spring seat 752, a supporting sleeve 753 and a supporting spring 754, wherein the supporting seat 751 is clamped in the upper valve body 711, the second spring seat 752 is installed in the upper valve body 711 on the upper side of the supporting seat 751 through threads, the lower end of the supporting sleeve 753 is clamped on the supporting seat 751 through a second annular table extending outwards, the supporting spring 754 is sleeved on the supporting sleeve 753 and enables the upper end and the lower end of the supporting sleeve to be correspondingly pressed on the second spring seat 752 and the second annular table, the first spring seat 75 is installed in the supporting sleeve 753 through threads, and the upper end of the sliding sleeve 73 extends into the supporting seat 751 and the supporting sleeve 753. The adaptor of this setting has simple structure, easy dismounting, adjusts nimble, strong adaptability's advantage, can adjust the pretightning force of supporting spring 754 through second spring seat 752, has guaranteed the stability of structure, can adjust the pretightning force of balance spring 79 through first spring seat 75, has improved trip valve 7's adaptability, through making the upper end of sliding sleeve 73 stretch into supporting seat 751 and support set 753, has strengthened the stability of structure. In practice, the present invention will generally provide a sliding fit of sliding sleeve 73 with bearing 751 and bearing 753.

As a specific embodiment, the valve flap 77 is provided with a connecting post 771, a supporting disk 772 and a baffle ring 773, the upper end of the connecting post 771 is sleeved on the valve rod 76 through a groove arranged along the central axis and is connected with the valve rod 76 through a pin shaft, a third annular table is arranged on the connecting post 771, a third spring seat is sleeved on the connecting post 771 on the upper side of the third annular table, and the lower end of the driving spring 78 is pressed on the third spring seat; the support disc 772 and the baffle ring 773 are sleeved on the connecting column 771 from bottom to top, so that the support disc 772 is of a circular truncated cone structure with a large upper part and a small lower part, the first sealing gasket 774 is clamped on the upper side surface of the support disc 772 through a sealing groove, the outer diameter of the sealing groove is larger than that of the third circular truncated cone, the second sealing gasket 775 opposite to the cutting valve port 191 is embedded on the conical surface of the support disc 772, and the baffle ring 773 is connected with the connecting column 771 through a pin shaft. The valve clack 77 arranged in the structure has the characteristics of convenience in disassembly and assembly and strong adaptability, the first sealing gasket 774 is clamped on the upper side face of the supporting disc 772 through the sealing groove, the outer diameter of the sealing groove is larger than that of the third ring platform, the sealing reliability between the supporting disc 772 and the third ring platform is enhanced, and the sealing reliability between the supporting disc 772 and the cutting valve port 191 is enhanced by enabling the supporting disc 772 to adopt a circular platform-shaped structure and embedding the second sealing gasket 775 on the conical surface of the supporting disc 772. As a specific embodiment, the invention adopts the following sealing and fixing modes for the sliding sleeve 73: a fourth annular table 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, the compression nut 732 is in threaded fit with the sliding sleeve 73, and the inner edge of the membrane 72 is squeezed between the fourth annular table and the pressure plate 731. The device has the characteristics of simple structure, convenient disassembly and assembly and good sealing effect.

The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solutions of the present invention should fall within the scope of the invention defined by the claims without departing from the design concept of the present invention.

Claims

1. A fuel gas pressure regulating system comprises a pressure regulating box (1) buried underground and a diffusing tower (2) fixed on the ground, wherein a protective box (3) exposed out of the ground is fixed on the pressure regulating box (1) in a sealing manner, the protective box (3) comprises a bottom shell (31) and a box cover (32) hinged on the bottom shell (31), and the fuel gas pressure regulating system is characterized in that an inner cavity of the pressure regulating box (1) is divided into an air inlet chamber (12) and a pressure regulating chamber through a first partition plate (11), the pressure regulating chamber is divided into a primary pressure chamber (15) and a secondary pressure chamber (16) through a second partition plate (13) and a third partition plate (14), a valve port pressure regulating (141) is arranged on the third partition plate (14), the secondary pressure chamber (16) is sequentially connected with an air storage tank (4) and a diffusing valve (5) in the protective box (3) through pipelines, an air inlet pipe (17) and an air outlet pipe (18) communicated with the air inlet chamber (12) and the secondary pressure chamber (16) are correspondingly arranged on the left side and the right side of the pressure regulating box (1), a communicating pipe (19) is fixed in the air inlet chamber (12), a cut-off valve port (191) is arranged at the upper end of the communicating pipe (19), the lower end of the communicating pipe (19) is communicated with a primary pressure chamber (15), a pressure regulating box (1) is hermetically fixed with a pressure regulator (6) and a cut-off valve (7) which are positioned in a protective box (3), the pressure regulator (6) is used for controlling the size of a pressure regulating valve port (141), the cut-off valve (7) is used for sealing the cut-off valve port (191) when the air pressure in a secondary pressure chamber (16) is increased to a preset pressure value, a diffusing pipe, an air inlet pipe and an air outlet pipe are arranged on the diffusing tower (2), the diffusing pipe is connected with a diffusing valve (5), and the air inlet pipe and the air outlet pipe are respectively communicated with an inner cavity of the protective box (3); the upper side of drain pan (31) is fixed with frame (33) that unilateral cross-section is the L type through the screw, be fixed with transparent sealing plate (34) through the screw in frame (33), be equipped with the sealing washer between frame (33) and drain pan (31) and sealing plate (34), the upper end of frame (33) is equipped with arch (331), the one end of case lid (32) is articulated with frame (33), be equipped with locking mechanism between the other end of case lid (32) and frame (33), the downside of case lid (32) inlays and is equipped with sealing strip (321) with arch (331) complex.

2. The gas pressure regulating system according to claim 1, wherein a support plate (192) is fixed in the gas inlet chamber (12), the communicating pipe (19) penetrates through the support plate (192) and enables the support plate and the communicating pipe to be fixedly connected in a sealing mode, the lower end of the communicating pipe (19) is fixedly connected with the first partition plate (11) in a sealing mode, a filter cartridge (8) is sleeved on the periphery of the communicating pipe (19), and the upper end and the lower end of the filter cartridge (8) are correspondingly pressed against the pressure regulating box (1) and the support plate (192).

3. The gas pressure regulating system according to claim 2, wherein the diffusing tower (2) comprises a hollow tower body (21), a three-way joint (22) is installed at the top of the tower body (21), a left port of the three-way joint (22) is connected with a diffusing cap (24) through a left elbow (23), a right port of the three-way joint (22) is connected with an arc pipe (26) through a right elbow (25), a port of the arc pipe (26) faces downwards and is combined with the right elbow (25) to form an S shape, the diffusing pipe, an air inlet pipe and an air outlet pipe extend into the tower body (21) from an opening at the lower end, the upper end of the diffusing pipe is located in the diffusing cap (24), the upper end of the air inlet pipe extends out from an opening at the middle part of the tower body (21), and the upper end of the air outlet pipe is located in the arc 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), the middle of the tower body (21) is fixed with a wind box (28) with one side open, the upper end of the wind inlet pipe is arranged in the wind box (28), the diffusing cap (24) comprises an integrated interface tube (241) and a hollow mushroom head (242), and the bottom wall of the mushroom head (242) is provided with diffusing holes (243) distributed at intervals around the interface tube (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), a guide sleeve (74), a first spring seat (75), a valve rod (76), a valve clack (77), a drive spring (78) and a balance spring (79), the valve body (71) is hermetically fixed on the pressure regulating box (1), the outer edge of the membrane (72) is hermetically and fixedly connected with the valve body (71) and divides the inner cavity of the valve body (71) into an upper cavity and a lower cavity, the upper cavity is communicated with the atmosphere, the lower cavity is communicated with the gas storage tank (4), the sliding sleeve (73) is hermetically fixed in the middle of the membrane (72), an inner annular groove is formed in the inner wall of the sliding sleeve (73), the guide sleeve (74) is hermetically fixed on the valve body (71), a first annular platform (741) is arranged on the lower side of the valve body (71) of the guide sleeve (74), and 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, steel balls (742) matched with the inner annular groove are arranged in the tapered holes, the first spring seat (75) is installed in the valve body (71) through an adapter, the valve rod (76) penetrates through the guide sleeve (74), the sliding sleeve (73) and the first spring seat (75), a sealing ring is arranged between the valve rod (76) and the sliding sleeve (73) as well as between the valve rod (76) and the guide sleeve (74), the outer annular groove matched with the steel balls (742) is arranged on the valve rod (76), the valve clack (77) is installed at the lower end of the valve rod (76) and is arranged opposite to the cutting valve port (191), the driving spring (78) is sleeved on the guide sleeve (74) and enables the upper end and the lower end of the driving spring to correspondingly abut against the first annular table (741) and the valve clack (77), and the balance spring (79) is sleeved on the valve rod (76) and enables the upper end and the lower end of the driving spring seat (75) to correspondingly abut against the first spring seat (75) and the 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) which are fixedly connected through a screw, an end cover (713) is installed on an upper port of the upper valve body (711) through a thread, a sealing ring is arranged between the end cover (713) and the upper valve body (711), the guide sleeve (74) is installed on the lower valve body (712) through a thread, the sealing ring is arranged between the first annular table (741) and the lower valve body (712), and an outer edge of the coating (72) is extruded between the upper valve body (711) and the lower valve body (712).

7. The gas pressure regulating system according to claim 6, wherein the adaptor comprises a support base (751), a second spring seat (752), a support sleeve (753) and a support spring (754), the support base (751) is clamped in the upper valve body (711), the second spring seat (752) is installed in the upper valve body (711) through a screw thread, the lower end of the support sleeve (753) is clamped on the support base (751) through a second annular table extending outwards, the support spring (754) is sleeved on the support sleeve (753) and enables the upper end and the lower end of the support spring seat to be correspondingly pressed on the second spring seat (752) and the second annular table, the first spring seat (75) is installed in the support sleeve (753) through a screw thread, and the upper end of the sliding sleeve (73) extends into the support base (751) and the support sleeve (753).

8. The gas pressure regulating system according to claim 5, wherein the valve flap (77) comprises a connecting post (771), a supporting disk (772) and a baffle ring (773), the upper end of the connecting post (771) is sleeved on the valve rod (76) through a groove arranged along the central axis and is connected with the valve rod (76) through a pin shaft, a third annular table is arranged on the connecting post (771), a third spring seat is sleeved on the connecting post (771) on the upper side of the third annular table, the lower end of the driving spring (78) is pressed on the third spring seat, the supporting disk (772) and the baffle ring (773) are sleeved on the connecting post (771) from bottom to top, the supporting disk (772) is in a circular table shape with a large upper part and a small lower part, a first conical surface (774) is clamped on the upper side surface of the supporting disk (772) through a sealing groove, the outer diameter of the supporting disk is larger than that of the third annular table, a second sealing gasket (775) opposite to the cutting-off valve port of the supporting disk (772) is embedded on the supporting disk (772), the baffle ring (773) is connected with the connecting column (771) through a pin shaft.

9. A gas pressure regulating system according to claim 5, wherein the lower end of the sliding sleeve (73) is provided with a fourth annular table, the sliding sleeve (73) is sleeved with a pressure plate (731) and a compression nut (732), the compression nut (732) is in threaded fit with the sliding sleeve (73), and the inner edge of the membrane (72) is squeezed between the fourth annular table and the pressure plate (731).