CN218523419U - Straight-through buried voltage regulating device - Google Patents

Abstract

The utility model relates to a through type buries ground regulator, including pressure regulating box and the sealed protective housing of fixing on pressure regulating box, pressure regulating box's inner chamber is separated for inlet chamber and surge-chamber through first baffle, the surge-chamber passes through second baffle and third baffle and separates for one-level pressure chamber and second grade pressure chamber, be equipped with the pressure regulating valve port on the third baffle, the side correspondence of controlling of pressure regulating box is equipped with intake pipe and the outlet duct that communicates with inlet chamber and second grade pressure chamber, be fixed with communicating pipe in the inlet chamber, the upper end of communicating pipe is equipped with cuts off the valve port, the lower extreme and the one-level pressure chamber intercommunication of communicating pipe, pressure regulating box is last sealed to be fixed with voltage regulator and trip valve, the voltage regulator is used for controlling the size of pressure regulating valve port, the trip valve port is cut off in sealing when atmospheric pressure in the second grade pressure chamber rises to predetermined pressure value, the protective housing includes the drain pan and articulates the case lid in the drain pan, be equipped with seal structure between drain pan and the case lid. The device has the advantages of simple structure, convenience in maintenance, good safety, high reliability and strong adaptability.

Description

Straight-through buried voltage regulating device

Technical Field

The utility model relates to a regulator, concretely relates to through's buried gas pressure regulating device.

Background

With the development of science and technology and society, gas pipe networks increasingly adopt the mode of setting pressure regulating box underground (buried pressure regulating box for short) to save ground space, improve the security. However, the existing buried pressure regulating box has the problems of complex structure, poor safety and inconvenient installation and maintenance in practical application and needs to be improved or perfected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a through buries ground pressure regulating device, it has simple structure, maintains the convenience, the security is good, the reliability is high, strong adaptability's advantage.

In order to solve the problems in the prior art, the utility model provides a through type buried pressure regulating device, including pressure regulating box and the protective box of sealed fixing on pressure regulating box, the inner chamber of pressure regulating box is separated into air inlet chamber and pressure regulating chamber through first baffle, pressure regulating chamber is separated into one-level pressure chamber and second grade pressure chamber through second baffle and third baffle, be equipped with the pressure regulating valve port on the third baffle, the left and right sides of pressure regulating box correspond and are equipped with intake pipe and outlet duct with air inlet chamber and second grade pressure chamber intercommunication, be fixed with communicating pipe in the air inlet chamber, the upper end of communicating pipe is equipped with cuts off the valve port, the lower extreme and the one-level pressure chamber intercommunication of communicating pipe, sealed fixing has voltage regulator and the trip valve in protective box on the pressure regulating box, the voltage regulator is used for controlling the size of pressure regulating valve port, the trip valve is used for sealing the valve port and cutting off when the atmospheric pressure in the second grade pressure chamber rises to the predetermined pressure value; the protective box comprises a bottom shell and a box cover hinged to the bottom shell, and a sealing structure is arranged between the bottom shell and the box cover.

Further, the utility model relates to a through buries ground regulator, wherein, be fixed with the backup pad in the air inlet chamber, communicating pipe passes the backup pad and makes both sealed fixed connection, the lower extreme and the sealed fixed connection of first baffle of communicating pipe, and the peripheral cover of communicating pipe is equipped with the cartridge filter, and the last lower extreme of cartridge filter corresponds the top and presses in pressure regulating box and backup pad.

Further, the utility model relates to a through buries ground pressure regulating device, wherein, the trip valve includes the valve body, the involucra, the sliding sleeve, the uide bushing, first spring seat, the valve rod, the valve clack, drive spring and balance spring, the valve body is sealed to be fixed on the pressure regulating case, the outer fringe and the sealed fixed connection of valve body of involucra separate the inner chamber of valve body for epicoele and lower chamber, epicoele and atmosphere intercommunication, lower chamber and second grade pressure chamber intercommunication, the sliding sleeve is sealed to be fixed at the middle part of involucra, be equipped with inner ring groove on the inner wall of sliding sleeve, the uide bushing is sealed to be fixed on the valve body, the uide bushing is equipped with first ring platform in the downside position of valve body, the upper end of uide bushing stretches into the sliding sleeve, the uide bushing is equipped with a plurality of taper holes along circumference distribution, be equipped with inner ring groove complex steel ball in the taper hole, first spring seat passes the uide bushing, sliding sleeve and first spring seat are equipped with the sealing washer between valve rod and sliding sleeve, be equipped with the outer ring groove of steel ball complex at the lower extreme of valve rod and with the relative setting with cutting off the valve clack, drive spring cover on the uide bushing and make it correspond top spring seat to push up the valve rod and make the top spring seat.

Further, the utility model relates to a through buries ground pressure regulating device, wherein, the valve body includes last valve body and lower valve body through a plurality of screw fixed connection, and the end cover is installed through the screw thread to the last port of going up the valve body, is equipped with the sealing washer between end cover and the last valve body, the uide bushing passes through the screw thread and installs under on the valve body, is equipped with the sealing washer between first ring platform and the lower valve body, the outer fringe extrusion of involucra is between last valve body and lower valve body.

Further, the utility model relates to a through buries ground pressure regulating device, wherein, the adaptor includes supporting seat, second spring seat, supports cover and supporting spring, and the supporting seat clamps in last valve body, and the second spring seat passes through the screw thread to be installed in last valve body, and the lower extreme that supports the cover clamps on the supporting seat through second ring platform, and the supporting spring cover is sheathe in and makes its upper and lower extreme correspond the top and press on second spring seat and second ring platform at the supporting seat, first spring seat passes through the screw thread to be installed in supporting the cover, the upper end of sliding sleeve stretches into the supporting seat and supports in the cover.

Further, the utility model relates to a through buries ground pressure regulating device, wherein, the lower extreme of sliding sleeve is equipped with third ring platform, and the cover is equipped with pressure disk and nut on the sliding sleeve of third ring platform upside, nut and sliding sleeve screw-thread fit, the inner edge extrusion of involucra is between third ring platform and pressure disk.

Further, the utility model relates to a through buries ground pressure regulating device, wherein, the valve clack includes spliced pole, supporting disk and fender ring, the recess cover that the upper end of spliced pole set up through along the axis makes both through the round pin hub connection on the valve rod, be equipped with fourth ring platform on the spliced pole, the cover is equipped with the third spring seat on the spliced pole of fourth ring platform upside, driving spring's lower extreme roof pressure is on the third spring seat, the supporting disk with keep off the ring by lower supreme cover on the spliced pole, be equipped with first sealed pad between supporting disk and the fourth ring platform, it seals up with the sealed pad of the second that cuts off the valve port phase to inlay on the supporting disk, it is connected with the spliced pole through the round pin axle to keep off the ring.

Further, the utility model relates to a through buries ground pressure regulating device, wherein, the supporting disk is big-end-up's round platform shape, and the last side of supporting disk is equipped with the seal groove that holds first sealed pad, and the diameter of seal groove is greater than the diameter of fourth ring platform, the sealed pad of second inlays to be established on the conical surface of supporting disk.

Further, the utility model relates to a through buries ground regulator, wherein, the upper end of drain pan has the frame that unilateral cross-section is the L type through the fix with screw, has the transparent board of sealing through the fix with screw in the frame, and frame and drain pan and sealing are equipped with the sealing washer between the board, and the upper end of frame is equipped with the arch, and the one end and the frame of case lid are articulated, are equipped with locking mechanism between the other end of case lid and the frame, and the downside of case lid inlays and is equipped with the sealing strip that corresponds with the arch.

Further, the utility model relates to a through buries ground regulator, wherein, the pressure regulating box is fixed with braced frame, the both ends of protective housing are equipped with the through-hole sleeve pipe respectively.

The utility model relates to a through buries ground pressure regulating device compares with prior art, has following advantage: the utility model discloses a set up pressure regulating box and sealed guard box fixed on pressure regulating box, make the inner chamber of pressure regulating box separate for air inlet chamber and surge-chamber through first baffle, make the surge-chamber separate for one-level pressure chamber and second grade pressure chamber through second baffle and third baffle, set up the pressure regulating valve port on the third baffle, correspond to set up intake pipe and outlet duct that communicate with air inlet chamber and second grade pressure chamber in the left and right sides of pressure regulating box, fix communicating pipe in the air inlet chamber, set up the cut-off valve port in the upper end of communicating pipe, and make the lower extreme and the one-level pressure chamber of communicating pipe communicate; 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 protective box is provided with a bottom shell and a box cover hinged on the bottom shell, and a sealing structure is arranged between the bottom shell and the box cover. Therefore, the through type buried voltage regulating device is simple in structure, convenient to maintain, good in safety, high in reliability and strong in adaptability. In practical application, bury the pressure regulating box in the underground and make the protective housing expose ground, let intake pipe and outlet duct correspond with upper reaches gas conveyer pipe and low reaches gas conveyer union coupling, the size of the in-process through the pressure regulator control pressure regulating valve port of gas flow through the pressure regulating box can realize the pressure regulating, seals through the trip valve and cuts off the valve port when atmospheric pressure in the second grade pressure chamber risees to predetermined pressure value and has guaranteed the security. The utility model discloses make pressure regulating box divide into air inlet chamber, primary pressure chamber and second grade pressure chamber through first baffle, second baffle and third baffle, and correspond on third baffle and communicating pipe and set up the pressure regulating valve port and cut off the valve port, formed straight-through pressure regulating box, compare with axial-flow type pressure regulating box, simplified the structure on the one hand, reduced the technology degree of difficulty, on the other hand improved suitability and pressure regulating range; by arranging the cut-off valve, when the air pressure in the secondary pressure cavity is increased to a preset pressure value, the cut-off valve seals and cuts off the valve port, so that the safety is improved; through setting up the protective housing to set up voltage regulator and trip valve in the protective housing, can play effectual guard action to equipment such as voltage regulator, trip valve on the one hand, improved the fail safe nature of equipment, on the other hand accessible is opened the protective housing and is examined, is maintained equipment such as voltage regulator, trip valve, has improved the convenience of operation.

The through type buried voltage regulating device of 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 through buried pressure regulating device of the present invention;

fig. 2 is a top view of the through buried voltage regulating device of the present invention;

fig. 3 is an axonometric view of a through type buried voltage regulator of the utility model;

FIG. 4 isbase:Sub>A view taken along line A-A of FIG. 2;

fig. 5 is a front view of a pressure regulating box in the straight-through buried pressure regulating device of the present invention;

fig. 6 is a top view of a pressure regulating box in the straight-through buried pressure regulating device of the present invention;

FIG. 7 is an axonometric view of a pressure regulating box in the straight-through buried pressure regulating device of the present invention;

FIG. 8 is a view taken along line C-C of FIG. 6;

FIG. 9 is a partial enlarged view of the position B in FIG. 4;

fig. 10 is a partial enlarged view of a portion at a position D in fig. 8.

Detailed Description

It should be noted that the above, lower, left, right, front, back, etc. directional terms in the present invention are only described according to the accompanying drawings for easy understanding, and are not intended to limit the technical solution and the scope of the present invention.

As shown in fig. 1 to fig. 10, the present invention relates to a through type buried voltage regulator, which comprises a voltage regulating box 1 and a protection box 2 hermetically fixed on the voltage regulating box 1. The inner cavity of the pressure regulating box 1 is divided into an air inlet chamber 12 and a pressure regulating chamber by a first partition plate 11, the pressure regulating chamber is divided into a primary pressure chamber 15 and a secondary pressure chamber 16 by a second partition plate 13 and a third partition plate 14, a pressure regulating valve port 141 is arranged on the third partition plate 14, and an air inlet pipe 17 and an air outlet pipe 18 which are 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 communication pipe 19 is fixed to the intake chamber 12, a shut-off valve port 191 is provided at the upper end of the communication pipe 19, and the lower end of the communication pipe 19 communicates with the primary pressure chamber 15. A pressure regulator 3 and a shut-off valve 4 are hermetically fixed in the protective box 2 on the pressure regulating box 1, wherein the pressure regulator 3 is used for controlling the size of the pressure regulating valve port 141, and the shut-off valve 4 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 protection box 2 is provided with a bottom case 21 and a cover 22 hinged to the bottom case 21, and a seal structure is provided between the bottom case 21 and the cover 22.

Through the structure arrangement, the through type buried voltage regulating device with simple structure, convenient maintenance, good safety, high reliability and strong adaptability is formed. In practical application, bury pressure regulating box 1 in the underground and make protective housing 2 expose on ground, let intake pipe 17 and outlet duct 18 correspond with upper reaches gas conveyer pipe and low reaches gas conveyer pipe connection, can realize the pressure regulating through the size of pressure regulator 3 control pressure regulating valve port 141 at the in-process that the gas flows through pressure regulating box 1, when atmospheric pressure in the second grade pressure chamber 16 risees to predetermined pressure value (safe value), seal through trip valve 4 and cut off valve port 191 and guaranteed the security. The utility model discloses make pressure regulating box 1 divide into air inlet chamber 12, primary pressure chamber 15 and second grade pressure chamber 16 through first baffle 11, second baffle 13 and third baffle 14, and correspond on third baffle 14 and communicating pipe 19 and set up pressure regulating valve port 141 and cut off valve port 191, formed the straight-through pressure regulating box, compare with axial-flow type pressure regulating box, simplified the structure on the one hand, reduced the technology degree of difficulty, on the other hand improved the suitability and the pressure regulating scope of pressure regulating box; by arranging the cut-off valve 4 and enabling the cut-off valve 4 to seal the cut-off valve port 191 when the air pressure in the secondary pressure cavity 16 is increased to a preset pressure value, the safety is improved; through setting up protective housing 2 to set up pressure regulator 3 and trip valve 4 in protective housing 2, can play effectual guard action to equipment such as regulator 3, trip valve 4 on the one hand, improved the fail safe nature of equipment, on the other hand accessible is opened protective housing 2 and is examined, is maintained to equipment such as regulator 3, trip valve 4, has improved the convenience of operation. In practical application, the utility model discloses make pressure regulating box 1 adopt welded structure usually to guarantee the steadiness and the sealed reliability of structure.

As a specific embodiment, the present invention makes the communicating pipe 19 adopt the following fixing method: 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 5 is sleeved on the periphery of the communication pipe 19, and the upper end and the lower end of the filter cartridge 5 are correspondingly pressed against the pressure regulating tank 1 and the supporting plate 192. Through setting up impurity in the cartridge filter 5 effective filtering gas, guaranteed the gas quality after the pressure regulating and terminal customer's gas safety. In practical application, the utility model discloses make communicating pipe 19 and backup pad 192 and first baffle 11 adopt the sealed fixed mode of welded usually to set up the sealing washer in the upper and lower end of cartridge filter 5, with the stability and the sealed reliability that improve the structure. However, it should be noted that the communication pipe 19 is not limited to the welding and sealing manner, and other sealing and fixing manners may be adopted.

As a specific implementation mode, the utility model discloses make trip valve 4 adopted following structure: the valve comprises a valve body 41, a membrane 42, a sliding sleeve 43, a guide sleeve 44, a first spring seat 45, a valve rod 46, a valve clack 47, a driving spring 48 and a balance spring 49, wherein the valve body 41 is fixed on the pressure regulating box 1 in a sealing way, the outer edge of the membrane 42 is fixedly connected with the valve body 41 in a sealing way and divides the inner cavity of the valve body 41 into an upper cavity and a lower cavity, the upper cavity is communicated with the atmosphere, and the lower cavity is communicated with a secondary pressure cavity 16; the sliding sleeve 43 is fixed in the middle of the involucra 42 in a sealing way, and an inner annular groove is arranged on the inner wall of the sliding sleeve 43; the guide sleeve 44 is fixed on the valve body 41 in a sealing manner, a first annular platform 441 is arranged at the lower side of the valve body 41 of the guide sleeve 44, the upper end of the guide sleeve 44 extends into the sliding sleeve 43, the guide sleeve 44 is provided with a plurality of tapered holes distributed along the circumferential direction, and steel balls 442 matched with the inner annular groove are arranged in the tapered holes; the first spring seat 45 is installed in the valve body 41 on the upper side of the sliding sleeve 43 through an adapter; the valve rod 46 penetrates through the guide sleeve 44, the sliding sleeve 43 and the first spring seat 45, sealing rings are respectively arranged between the valve rod 46 and the sliding sleeve 43 as well as between the valve rod 46 and the guide sleeve 44, and an outer annular groove matched with the steel ball 442 is formed in the valve rod 46; the valve clack 47 is arranged at the lower end of the valve rod 46 and is opposite to the cut-off valve port 191; the driving spring 48 is sleeved on the guide sleeve 44 and enables the upper end and the lower end of the driving spring to be correspondingly pressed on the first annular platform 441 and the valve clack 47; the balance spring 49 is sleeved on the valve rod 46 and enables the upper end and the lower end of the balance spring to be correspondingly pressed on the first spring seat 45 and the sliding sleeve 43. The shut-off valve 4 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 and the lower cavity and the elastic force of the balance spring 49 are in a balanced state, the membrane 42 and the sliding sleeve 43 are protected and are not moved, at the moment, the inner annular groove is positioned at the lower side position of the steel ball 442, the steel ball 442 is pressed into the outer annular groove, the valve rod 46 is locked, and the driving spring 48 is in an energy storage state; when the air pressure in the secondary pressure chamber 16 and the lower chamber rises, the membrane 42 and the sliding sleeve 43 move upwards, when the air pressure in the secondary pressure chamber 16 and the lower chamber rises to a preset pressure value, the inner annular groove rises to the same height position as the steel ball 442 along with the sliding sleeve 43, the steel ball 442 is extruded by the valve rod 46 to enter the inner annular groove under the action of the driving spring 48, the valve rod 46 is unlocked and moves downwards, and the valve port 191 is closed and cut off through the valve clack 47, so that the purpose of safe cut-off is achieved. After the air pressure is recovered to normal or the failure is eliminated, the valve rod 46 is lifted upwards to reset. It should be noted that the structure and operation of the voltage regulator 3 are well known to those skilled in the art, and will not be described herein.

As an optimized scheme, the valve body 41 of the present embodiment adopts a structure of split design and combined use, and specifically includes an upper valve body 411 and a lower valve body 412 fixedly connected by a plurality of screws, an end cover 413 is installed at an upper port of the upper valve body 411 by a screw thread, and a seal ring is arranged between the end cover 413 and the upper valve body 411. The guide sleeve 44 is mounted on the lower valve body 412 through threads, a seal ring is arranged between the first annular platform 441 and the lower valve body 412, and the outer edge of the coating 42 is extruded between the upper valve body 411 and the lower valve body 412. The valve body 41 with the arrangement has the characteristics of simple structure, easiness in preparation and convenience in disassembly and assembly. As an optimized scheme, the adapter piece adopts the following structure in the specific embodiment: the valve comprises a supporting seat 451, a second spring seat 452, a supporting sleeve 453 and a supporting spring 454, wherein the supporting seat 451 is clamped in the upper valve body 411, the second spring seat 452 is arranged in the upper valve body 411 at the upper side of the supporting seat 451 through threads, the lower end of the supporting sleeve 453 is clamped on the supporting seat 451 through a second annular table, the supporting spring 454 is sleeved on the supporting sleeve 453, the upper end and the lower end of the supporting spring are correspondingly pressed on the second spring seat 452 and the second annular table, the first spring seat 45 is arranged in the supporting sleeve 453 through threads, and the upper end of the sliding sleeve 43 extends into the supporting seat 451 and the supporting sleeve 453. The adaptor that this set up has simple structure, easy dismounting, adjusts nimble, strong adaptability's advantage, can adjust supporting spring 454's pretightning force through second spring seat 452, has guaranteed the stability of structure, can adjust balancing spring 49's pretightning force through first spring seat 45, has improved trip valve 4's adaptability, and the upper end through making sliding sleeve 43 stretches into supporting seat 451 and support cover 453 in, has strengthened the stability of structure. In practice, the present invention generally provides a sliding fit of the sliding sleeve 43 with the support base 451 and the support sleeve 453.

As a specific implementation mode, the utility model discloses make sliding sleeve 43 adopt following sealed fixed mode: a third ring platform is provided at the lower end of the sliding sleeve 43, a pressure plate 431 and a nut 432 are sleeved on the sliding sleeve 43 on the upper side of the third ring platform, and the nut 432 is in threaded fit with the sliding sleeve 43, wherein the inner edge of the coating 42 is squeezed between the third ring platform and the pressure plate 431. The device has the characteristics of simple structure, convenient assembly and disassembly and reliable sealing. As a specific embodiment, the present invention provides the valve flap 47 with a connecting post 471, a supporting plate 472 and a retaining ring 473, wherein the upper end of the connecting post 471 is sleeved on the valve rod 46 through a groove arranged along the central axis and is connected to the valve rod 46 through a pin, a fourth ring platform is arranged on the connecting post 471, a third spring seat is sleeved on the connecting post 471 at the upper side of the fourth ring platform, and the lower end of the driving spring 48 is pressed against the third spring seat; the support plate 472 and the retaining ring 473 are sleeved on the connecting column 471 from bottom to top, the first sealing gasket 474 is arranged between the support plate 472 and the fourth ring platform, the second sealing gasket 475 opposite to the cut-off valve port 191 is embedded on the support plate 472, and the retaining ring 473 is connected with the connecting column 471 through the pin shaft. The valve clack 47 arranged in the way has the characteristics of convenience in disassembly and assembly, strong adaptability and reliable sealing. Meanwhile, in the present embodiment, the supporting plate 472 has a truncated cone-shaped structure with a large top and a small bottom, a sealing groove for accommodating the first sealing gasket 474 is disposed on the upper side surface of the supporting plate 472, the diameter of the sealing groove is larger than that of the fourth annular table, and the second sealing gasket 475 is fitted on the tapered surface of the supporting plate 472. This arrangement effectively enhances the sealing reliability of the first seal gasket 474 and the second seal gasket 475.

As a specific implementation manner, the utility model discloses fixed the frame 23 that unilateral cross-section is the L type through the screw in the upper end of drain pan 21, through the fix with screw transparent sealing plate 24 in frame 23 to set up the sealing washer between frame 23 and drain pan 21 and sealing plate 24, set up arch 231 in the upper end of frame 23, wherein, the one end of case lid 22 is articulated with frame 23, is equipped with locking mechanism between the other end of case lid 22 and frame 23, and case lid 22 downside inlays and is equipped with the sealing strip 221 that corresponds with arch 231. This arrangement forms a double protection structure formed by the sealing plate 24 and the cover 22 at the upper end of the bottom case 21, thereby enhancing safety and reliability, and enhancing sealing and waterproof effects by providing the protrusion 231 and the sealing strip 221. During patrol, the working states of the pressure regulator 3, the cut-off valve 4 and other equipment can be observed through the sealing plate 24 only by opening the box cover 22, and the sealing plate 24 still can play an effective protection role at the moment; when a fault occurs, the sealing plate 24 can be removed to inspect and maintain the pressure regulator 3 and the cut-off valve 4. In practical application, the utility model is also provided with through hole sleeves 25 at two ends of the protective box 2 respectively, so as to lead the diffusing pipe and the ventilation pipe out of the protective box and realize sealing; for the stability of reinforcing support and burying the ground state, the utility model discloses generally fix the pressure regulating box on braced frame 6 and bury in the underground together.

The above embodiments are only descriptions of the preferred embodiments of the present invention, and are not intended to 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 present invention as defined by the claims.

Claims (10)

1. A straight-through buried pressure regulating device comprises a pressure regulating box (1) and a protective box (2) which is hermetically fixed on the pressure regulating box (1), and 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 pressure regulating valve port (141) is arranged on the third partition plate (14), an air inlet pipe (17) and an air outlet pipe (18) which are 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 cutting-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 the primary pressure chamber (15), a pressure regulator (3) and a cutting-off valve (4) which are hermetically fixed in the protective box (2) are arranged on the pressure regulating box (1), the pressure regulator (3) is used for controlling a large pressure regulating valve port (141), the cutting-off valve port (4), the small pressure valve port (21) is used for controlling the pressure of the pressure regulating valve port (21) and hinged on the protective box, and the protective box (21) when the protective box (21) are closed, a sealing structure is arranged between the bottom shell (21) and the box cover (22).

2. A through buried pressure regulating device according to claim 1, characterized in that a support plate (192) is fixed in the air inlet chamber (12), the communicating pipe (19) passes through the support plate (192) and enables the support plate and the communicating pipe to be fixedly connected in a sealing manner, the lower end of the communicating pipe (19) is fixedly connected with the first partition plate (11) in a sealing manner, a filter cartridge (5) is sleeved on the periphery of the communicating pipe (19), and the upper end and the lower end of the filter cartridge (5) are correspondingly pressed against the pressure regulating box (1) and the support plate (192).

3. A straight-through buried pressure regulating device according to claim 2, characterized in that the cut-off valve (4) comprises a valve body (41), a membrane (42), a sliding sleeve (43), a guide sleeve (44), a first spring seat (45), a valve rod (46), a valve flap (47), a drive spring (48) and a balance spring (49), the valve body (41) is hermetically fixed on the pressure regulating box (1), the outer edge of the membrane (42) is hermetically and fixedly connected with the valve body (41) and divides the inner cavity of the valve body (41) into an upper cavity and a lower cavity, the upper cavity is communicated with the atmosphere, the lower cavity is communicated with the secondary pressure cavity (16), the sliding sleeve (43) is hermetically fixed in the middle of the membrane (42), an inner ring groove is arranged on the inner wall of the sliding sleeve (43), the guide sleeve (44) is hermetically fixed on the valve body (41), a first ring platform (441) is arranged at the lower side of the valve body (41) of the guide sleeve (44), the upper end of the guide sleeve (44) extends into the sliding sleeve (43), a plurality of taper holes distributed along the circumference are arranged in the guide sleeve, a first ring groove (442) is arranged in the valve body (44), the guide sleeve (442), the valve rod (43) and a first spring seat (45) and a first spring seat (46) and a balance spring seat (46) are arranged between the valve rod (43), an outer ring groove matched with the steel ball (442) is arranged on the valve rod (46), the valve clack (47) is installed at the lower end of the valve rod (46) and is arranged opposite to the cut-off valve port (191), the driving spring (48) is sleeved on the guide sleeve (44) and enables the upper end and the lower end of the driving spring to be correspondingly pressed on the first annular table (441) and the valve clack (47), and the balance spring (49) is sleeved on the valve rod (46) and enables the upper end and the lower end of the balance spring to be correspondingly pressed on the first spring seat (45) and the sliding sleeve (43).

4. A through buried pressure regulating device according to claim 3, wherein the valve body (41) comprises an upper valve body (411) and a lower valve body (412) which are fixedly connected through a plurality of screws, an end cover (413) is installed at the upper port of the upper valve body (411) through threads, a sealing ring is arranged between the end cover (413) and the upper valve body (411), the guide sleeve (44) is installed on the lower valve body (412) through threads, the sealing ring is arranged between the first annular platform (441) and the lower valve body (412), and the outer edge of the coating (42) is extruded between the upper valve body (411) and the lower valve body (412).

5. A straight-through buried pressure regulating device according to claim 4, characterized in that the adaptor comprises a supporting seat (451), a second spring seat (452), a supporting sleeve (453) and a supporting spring (454), the supporting seat (451) is clamped in the upper valve body (411), the second spring seat (452) is installed in the upper valve body (411) through threads, the lower end of the supporting sleeve (453) is clamped in the supporting seat (451) through a second annular table, the supporting spring (454) is sleeved on the supporting sleeve (453) and enables the upper end and the lower end of the supporting spring seat to be correspondingly pressed on the second spring seat (452) and the second annular table, the first spring seat (45) is installed in the supporting sleeve (453) through threads, and the upper end of the sliding sleeve (43) extends into the supporting seat (451) and the supporting sleeve (453).

6. A through buried pressure regulating device according to claim 5, characterized in that the lower end of the sliding sleeve (43) is provided with a third ring platform, the sliding sleeve (43) on the upper side of the third ring platform is sleeved with a pressure plate (431) and a nut (432), the nut (432) is in threaded fit with the sliding sleeve (43), and the inner edge of the membrane (42) is squeezed between the third ring platform and the pressure plate (431).

7. A through buried pressure regulating device according to claim 5, wherein the valve flap (47) comprises a connecting column (471), a supporting disk (472) and a baffle ring (473), the upper end of the connecting column (471) is sleeved on the valve rod (46) through a groove arranged along the central axis and is connected with the valve rod (46) through a pin shaft, a fourth ring platform is arranged on the connecting column (471), a third spring seat is sleeved on the connecting column (471) on the upper side of the fourth ring platform, the lower end of the driving spring (48) is abutted against the third spring seat, the supporting disk (472) and the baffle ring (473) are sleeved on the connecting column (471) from bottom to top, a first sealing gasket (474) is arranged between the supporting disk (472) and the fourth ring platform, a second sealing gasket (475) opposite to the cut-off valve port (191) is embedded on the supporting disk (472), and the baffle ring (473) is connected with the connecting column (471) through a pin shaft.

8. A buried voltage regulator according to claim 7, characterized in that the said support plate (472) is in the shape of a truncated cone with a big top and a small bottom, the top side of the support plate (472) is provided with a sealing groove for accommodating the first sealing gasket (474), the diameter of the sealing groove is larger than that of the fourth abutment, the said second sealing gasket (475) is embedded on the conical surface of the support plate (472).

9. A through buried pressure regulating device according to claim 5, characterized in that the upper end of the bottom shell (21) is fixed with a frame (23) with an L-shaped unilateral section through screws, a transparent sealing plate (24) is fixed in the frame (23) through screws, a sealing ring is arranged between the frame (23) and the bottom shell (21) and between the frame (23) and the sealing plate (24), a protrusion (231) is arranged at the upper end of the frame (23), one end of the box cover (22) is hinged with the frame (23), a locking mechanism is arranged between the other end of the box cover (22) and the frame (23), and a sealing strip (221) corresponding to the protrusion (231) is embedded in the lower side surface of the box cover (22).

10. A through buried voltage regulating device according to claim 5, characterized in that a supporting frame (6) is fixed to the voltage regulating box (1), and both ends of the protective box (2) are respectively provided with a through hole sleeve (25).

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