CN212929568U - Medium-low pressure underground gas pressure regulating device - Google Patents

Medium-low pressure underground gas pressure regulating device Download PDF

Info

Publication number
CN212929568U
CN212929568U CN202021257977.9U CN202021257977U CN212929568U CN 212929568 U CN212929568 U CN 212929568U CN 202021257977 U CN202021257977 U CN 202021257977U CN 212929568 U CN212929568 U CN 212929568U
Authority
CN
China
Prior art keywords
pressure regulating
pressure
box
regulating box
underground gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021257977.9U
Other languages
Chinese (zh)
Inventor
赵树园
梁文虎
蒋东杰
吴伟功
李松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Xinfengtai Gas Equipment Co ltd
Original Assignee
BEIJING XINGUANGJIN GAS DEVICE RESEARCH INSTITUTE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BEIJING XINGUANGJIN GAS DEVICE RESEARCH INSTITUTE filed Critical BEIJING XINGUANGJIN GAS DEVICE RESEARCH INSTITUTE
Priority to CN202021257977.9U priority Critical patent/CN212929568U/en
Application granted granted Critical
Publication of CN212929568U publication Critical patent/CN212929568U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The utility model relates to a well low pressure underground gas pressure regulating device, including the protective cradle, be fixed with the pressure regulating case on the protective cradle, the inner chamber of pressure regulating case falls into left chamber and right chamber, install the pressure regulating core in the pressure regulating case, pressure regulating case left end is connected with the import pipeline with left chamber intercommunication, install the import on the import pipeline and bury the ground valve, pressure regulating case right-hand member is connected with the export pipeline with right chamber intercommunication, install the export on the export pipeline and bury the ground valve, pressure regulating case upper end is fixed with the guard box, the guard box top is equipped with sealed frame, install waterproof window in the sealed frame, sealed frame top articulates there is the protective cover. The utility model has the advantages of compact structure, small volume, low noise, good heat preservation effect, occupied area saving, no sight shielding and capability of promoting the neatness of an industrial field.

Description

Medium-low pressure underground gas pressure regulating device
Technical Field
The utility model relates to a gas pressure regulating box technical field, concretely relates to well low pressure underground gas pressure regulating device.
Background
Most of the traditional domestic gas pressure regulating devices are arranged on the ground, and the valve, the filter, the cut-off valve, the pressure regulator and other equipment are sequentially connected inside the box body through pipelines. In the urban life, people tend to a calm, safe, comfortable and beautiful modern living environment. Because the transmission and distribution demand of current gas facility, need set up gas pressure regulating device in the residential quarter. However, the gas pressure regulating device has the following defects: 1. the occupied space is large, and the maintenance is complex; 2. the noise is high; 3. most of the gas pressure regulating boxes are arranged beside a road, so that the sight is easy to be shielded, and the attractiveness is influenced; 4. the risk of gas leakage caused by artificial damage exists; 5. the tank is easily opened, with the risk of being illegally parametrized and of cutting off the gas supply.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compact structure, small, the noise is low, the heat preservation is effectual, save area, do not shelter from the sight and can promote the well low pressure underground gas pressure regulating box of industrial field's clean and tidy degree.
For solving the above-mentioned problem that exists among the prior art, the utility model provides a pair of well low pressure secret gas pressure regulating device, including the protective cradle, be fixed with the pressure regulating case on the protective cradle, the inner chamber of pressure regulating case falls into left chamber and right chamber, install the pressure regulating core in the pressure regulating case, pressure regulating case left end is connected with the inlet pipeline with left chamber intercommunication, install the import on the inlet pipeline and bury ground valve, pressure regulating case right-hand member is connected with the outlet pipe who communicates with right chamber, install the export on the outlet pipeline and bury ground valve, pressure regulating case upper end is fixed with the guard box, the guard box top is equipped with sealed frame, install waterproof window in the sealed frame, sealed frame top articulates there is the protective cover.
Further, the utility model relates to a medium and low pressure underground gas pressure regulating device, wherein,
the pressure regulating core includes director, disjunctor, filter core and axial-flow type voltage regulator, director and disjunctor are installed on the roof of pressure regulating box, and filter core and axial-flow type voltage regulator are installed at pressure regulating incasement portion, the entrance point of axial-flow type voltage regulator links to each other with the left chamber of pressure regulating box, the exit end of axial-flow type voltage regulator links to each other with the right chamber of pressure regulating box, pressure gauge, back pressure gage and differential pressure gauge are pressed before still installing on the pressure regulating incasement roof, be equipped with back pressure signal pipe on director, disjunctor and the back pressure gage respectively, back pressure signal pipe all is connected to the manifold piece, be connected with back pressure signal house steward on the manifold piece, the back pressure signal house steward other end is connected to pressure regulating box and communicates with the right chamber of pressure regulating box.
Further, the utility model relates to a well low pressure underground gas pressure regulating device, wherein, be equipped with the integrated board of disc on the roof of pressure regulating box, disjunctor, commander, preceding pressure manometer, back pressure manometer, differential pressure meter and manifold block are installed on the integrated board.
Further, the utility model relates to a well low pressure underground gas regulator, wherein, be equipped with rubber seal one between seal frame and the protective cover, be equipped with twice rubber seal between seal frame and the guard box.
Further, the utility model relates to a well low pressure underground gas regulator, wherein, be equipped with the handle on the protective cover, be equipped with the air spring between sealed frame and the protective cover, air spring one end articulates in the protective cover inside wall other end articulates in sealed frame.
Further, the utility model relates to a well low pressure underground gas regulator, wherein, be equipped with on a lateral wall of guard box and diffuse mouth and vent.
Further, the utility model relates to a well low pressure underground gas regulator, wherein, the protective cradle includes four stands, the upper end at four stands is fixed to the guard box, and the lower extreme of four stands is connected with two crossbeams, and both ends are connected with the tie-beam respectively about two crossbeams, the import pipeline is through first staple bolt and left tie-beam fixed connection, the export pipeline passes through second staple bolt and the tie-beam fixed connection on right side, the protective cradle lower extreme is equipped with a plurality of supporting legs cups.
Further, the utility model relates to a well low pressure underground gas pressure regulating device, wherein, waterproof window both sides are equipped with the folding handle of relative setting.
The utility model relates to a well low pressure underground gas pressure regulating device compares with prior art, has following advantage: when the utility model is used in practice, only the protective cover and the sealing frame are arranged on the ground, and other parts are buried underground, thereby reducing noise, enhancing heat preservation effect and reducing artificial damage; the sight line cannot be shielded, and the neatness of a production site is ensured; secondly the utility model discloses install each part on the circuit board, compact structure has reduced whole volume greatly, has saved installation space. Gather the signal pipe into a back pressure signal house steward through the manifold piece, install on the pressure regulating case through the signal house steward, do not need an solitary dismantlement signal pipe when maintaining, saved the installation and the dismantlement time of maintenance in-process greatly, simplified the maintenance step.
The middle and low pressure underground gas pressure regulating device of the present invention will be described in further detail with reference to the embodiments shown in the drawings.
Drawings
FIG. 1 is a perspective view of a medium and low pressure underground gas pressure regulating device of the present invention;
fig. 2 is a front view of the middle and low pressure underground gas pressure regulating device of the present invention with the protective cover opened;
fig. 3 is the utility model relates to a top view of well low pressure underground gas pressure regulating device under the protective cover state of opening.
Detailed Description
As shown in fig. 1, fig. 2 and combine fig. 3, the utility model relates to a specific embodiment of well low pressure underground gas pressure regulating device, including protective cradle 1, be fixed with pressure regulating box 2 on the protective cradle 1, pressure regulating box 2's inner chamber falls into left chamber 21 and right chamber 22, install the pressure regulating core among the pressure regulating box 2, pressure regulating box 2 left end is connected with the inlet pipe 3 with left chamber 21 intercommunication, install the import on the inlet pipe 3 and bury ground valve 31, pressure regulating box 2 right-hand member is connected with the export pipeline 4 with right chamber 22 intercommunication, install export on the export pipeline 4 and bury ground valve 41, pressure regulating box 2 upper end is fixed with guard box 8, guard box 8 top is equipped with seal frame 81, install waterproof window 82 in the seal frame 81, seal frame 81 top articulates there is the protective cover 83.
The utility model discloses when practical application, only protective cover 83 and sealed frame 81 expose ground, have saved area, do not shelter from the sight, are favorable to promoting the clean and tidy degree of production site, reduce artificial destruction. The protective bracket 1 plays a role in protecting the whole pressure regulating box, the protective cover 83 is made of nodular cast iron, has strong bearing capacity, resists corrosion, meets the requirement of long-term use of the protective bracket, and plays a role in protecting components in the protective box 8. The waterproof window 82 and the protective cover 83 form double protection, and the equipment operation condition can be seen only by opening the protective cover 83 through the waterproof window 82 in the inspection process. The inner chamber of pressure regulating box 2 falls into left chamber 21 and right chamber 22, and the left end of pressure regulating box 2 is connected with inlet pipe 3, installs import on the inlet pipe 3 and buries ground valve 31, and import buries ground valve 31 and is used for controlling opening and closing of inlet pipe 3, and the right-hand member of pressure regulating box 2 is connected with outlet pipe 4, installs export on the outlet pipe 4 and buries ground valve 41, and export buries ground valve 41 and is used for controlling opening and closing of outlet pipe 4.
As specific implementation mode, as shown in fig. 3, the utility model provides a pressure regulating core includes director 5, disconnector 6, filter core and axial-flow type voltage regulator 23, director 5 and disconnector 6 are installed on the roof of pressure regulating box, filter core and axial-flow type voltage regulator 23 are installed inside the pressure regulating box, the entrance point of axial-flow type voltage regulator 23 links to each other with the left chamber 21 of pressure regulating box 2, the exit end of axial-flow type voltage regulator 23 links to each other with the right chamber 22 of pressure regulating box 2, still install preceding pressure manometer 24 on the 2 roof of pressure regulating box, back pressure manometer 25 and differential pressure table 26, director 5, be equipped with the back pressure signal pipe on disconnector 6 and the back pressure manometer 25 respectively, the back pressure signal pipe all is connected to manifold block 7, be connected with back pressure signal house steward 71 on manifold block 7, the back pressure signal house steward other end is connected to the pressure regulating box and communicates with the right chamber of pressure regulating box.
Wherein, the inlet end of the axial flow type pressure regulator 23 is connected with the left cavity 21 of the pressure regulating box 2 to form a front pressure cavity (namely, the inlet end of the axial flow type pressure regulator 23, the left cavity 21 of the pressure regulating box 2 and the inlet pipeline 3 form a passage); the exit end of axial-flow type voltage regulator 23 links to each other with the right chamber 22 of pressure regulating box 2 and constitutes the back pressure chamber (the exit end of axial-flow type voltage regulator 23 promptly, the right chamber 22 of pressure regulating box 2 and outlet pipe way 4 form the route), through above setting with axial-flow type voltage regulator 23 and pressure regulating box 2 organic combination, make the indirect and inlet pipe way 3 of axial-flow type voltage regulator 23 and outlet pipe way 4 intercommunication. Inlet pipe 3 and outlet pipe 4 all communicate with pressure regulating box 2 through seal welding mode, and the leakproofness that its seal welding formed is greater than other connected modes far away, is favorable to improving operating stability. The signal tubes connected with the cutter 6, the commander 5 and the outlet pressure gauge 26 are collected into a back pressure signal header 71 through a manifold block 7. The manifold block 7 has a cavity structure, plays a role in shunting and summarizing, is communicated with a back pressure cavity through the other end of the summarized back pressure signal header pipe 71, and is connected to the pressure regulating box 2 through the back pressure signal header pipe 71 and communicated with the back pressure cavity after summarizing the signal pipes connected to the disconnector 6, the commander 5 and the outlet pressure gauge 26 through the design. The pressure regulating core is more convenient to mount and dismount through the arrangement, when the pressure regulating core is dismounted, only one end of the rear pressure signal header pipe 71 is connected with the pressure regulating box 2 to be dismounted instead of dismounting one signal pipe independently, so that the mounting and dismounting time in the maintenance process is greatly saved, and the maintenance steps are simplified.
As shown in fig. 3, on the basis of the utility model discloses an embodiment, be fixed with the integrated board 9 of disc on the 2 roofs of pressure regulating box, wherein disconnector 6, commander 5, preceding pressure manometer 24, back pressure manometer 25, differential pressure gauge 26 and manifold piece 7 are all integrated on integrated board 9 through reasonable effectual arranging, further reduce the volume through above design, when overhauing, just can tear most parts out after separating integrated board 9 and pressure regulating box 2, make things convenient for later stage maintenance and change.
As shown in fig. 2 and fig. 3, in an embodiment of the present invention, a handle 84 is disposed on the protecting cover 83, a gas spring 85 is disposed between the sealing frame 81 and the protecting cover 83, and one end of the gas spring 85 is hinged to the inner sidewall of the protecting cover 83 and the other end is hinged to the sealing frame 81. The protective cover 83 is relatively heavy in weight, and the gas spring plays a role in assisting in the opening process of the protective cover 83, so that the protective cover 83 can be conveniently opened by a maintainer in a labor-saving manner.
In order to prevent water and dust from entering the inner cavity of the protection box 8, a rubber sealing ring is arranged between the sealing frame 81 and the protection cover 83. In order to ensure the sealing property of the part below the transparent window 82 in the inner cavity of the protection box 8, two rubber sealing rings are arranged between the sealing frame 81 and the protection box 8 and are fastened by screws; a rubber seal ring is arranged between the waterproof window 82 and the seal frame 81, and is fixed by a butterfly bolt.
The two sides of the waterproof window 82 are also provided with folding handles 89 which are oppositely arranged, under normal conditions, the folding handles 19 are folded, and when the waterproof window 82 needs to be opened, the butterfly bolts are detached, and the waterproof window 82 can be taken up by pulling the folding handles 19.
As a specific embodiment, as shown in fig. 1, a side wall of the protection box 8 of the present invention is provided with a discharge port 86 and a vent 87. The diffusing port 86 and the vent 87 are used for being matched with a diffusing tower to realize automatic ventilation of the protection box 8.
As a specific embodiment, as shown in fig. 2 and fig. 3, the protection bracket 1 includes four vertical columns, the protection box 8 is fixed at the upper ends of the four vertical columns, the lower ends of the four vertical columns are connected with two cross beams, the left and right ends of the two cross beams are respectively connected with a connection beam, the inlet pipeline 3 is fixedly connected with the connection beam at the left side through a first hoop 11, the outlet pipeline 4 is fixedly connected with the connection beam at the right side through a second hoop 12, and the lower end of the protection bracket 1 is provided with a plurality of supporting foot cups 13. The protective bracket 1 can effectively protect the pressure regulating box and is convenient to carry and place.
As a specific embodiment, the pressure regulating tank 2 is mounted with a signal sensor. The collection and remote transmission of inlet pressure, outlet pressure, and temperature and humidity in the box are realized by using the combination of a signal sensor and the prior art.
In the description of the present invention, it is to be understood that the terms "left", "right", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
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 (8)

1. The utility model provides a well low pressure underground gas pressure regulating device which characterized in that: including protective bracket (1), be fixed with pressure regulating box (2) on protective bracket (1), the inner chamber of pressure regulating box (2) falls into left chamber (21) and right chamber (22), install the pressure regulating core in pressure regulating box (2), pressure regulating box (2) left end is connected with import pipeline (3) with left chamber (21) intercommunication, install import on import pipeline (3) and bury ground valve (31), pressure regulating box (2) right-hand member is connected with export pipeline (4) with right chamber (22) intercommunication, it buries ground valve (41) to install the export on export pipeline (4), pressure regulating box (2) upper end is fixed with protective box (8), protective box (8) top is equipped with sealed frame (81), install waterproof window (82) in sealed frame (81), sealed frame (81) top articulates there is protective cover (83).
2. The medium and low pressure underground gas pressure regulating device according to claim 1, wherein the pressure regulating core comprises a director (5), a cutter (6), a filter element and an axial flow type pressure regulator (23), the director (5) and the cutter (6) are installed on the top wall of the pressure regulating box, the filter element and the axial flow type pressure regulator (23) are installed inside the pressure regulating box (2), the inlet end of the axial flow type pressure regulator (23) is connected with the left cavity (21) of the pressure regulating box (2), the outlet end of the axial flow type pressure regulator (23) is connected with the right cavity (22) of the pressure regulating box (2), the top wall of the pressure regulating box (2) is further provided with a front pressure gauge (24), a rear pressure gauge (25) and a differential pressure gauge (26), the director (5), the cutter (6) and the rear pressure gauge (25) are respectively provided with a rear pressure signal pipe, and the rear pressure signal pipes are all connected to a road block (7), the manifold block (7) is connected with a rear pressure signal header pipe (71), and the other end of the rear pressure signal header pipe (71) is connected to the pressure regulating box (2) and communicated with the right cavity (22) of the pressure regulating box (2).
3. The medium and low pressure underground gas pressure regulating device according to claim 2, wherein a disc-shaped manifold plate (9) is arranged on the top wall of the pressure regulating tank (2), and the disconnector (6), the commander (5), the front pressure gauge (24), the rear pressure gauge (25), the differential pressure gauge (26) and the manifold block (7) are mounted on the manifold plate (9).
4. The medium and low pressure underground gas pressure regulating device according to claim 3, wherein a rubber sealing ring is arranged between the sealing frame (81) and the protecting cover (83), and two rubber sealing rings are arranged between the sealing frame (81) and the protecting box (8).
5. The medium and low pressure underground gas pressure regulating device according to claim 4, wherein a handle (84) is arranged on the protecting cover (83), a gas spring (85) is arranged between the sealing frame (81) and the protecting cover (83), and one end of the gas spring (85) is hinged to the inner side wall of the protecting cover (83) and the other end is hinged to the sealing frame (81).
6. The medium and low pressure underground gas pressure regulating device according to claim 1, wherein a side wall of the protection box (8) is provided with a dispersion port (86) and a vent (87).
7. The medium and low pressure underground gas pressure regulating device according to claim 1, wherein the protective bracket (1) comprises four columns, the protective box (8) is fixed at the upper ends of the four columns, the lower ends of the four columns are connected with two beams, the left and right ends of the two beams are respectively connected with a connecting beam, the inlet pipeline (3) is fixedly connected with the left connecting beam through a first hoop (11), the outlet pipeline (4) is fixedly connected with the right connecting beam through a second hoop (12), and the lower end of the protective bracket (1) is provided with a plurality of supporting foot cups (13).
8. The medium and low pressure underground gas pressure regulating device according to claim 1, wherein folding handles (89) are oppositely arranged at two sides of the waterproof window (82).
CN202021257977.9U 2020-07-01 2020-07-01 Medium-low pressure underground gas pressure regulating device Active CN212929568U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021257977.9U CN212929568U (en) 2020-07-01 2020-07-01 Medium-low pressure underground gas pressure regulating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021257977.9U CN212929568U (en) 2020-07-01 2020-07-01 Medium-low pressure underground gas pressure regulating device

Publications (1)

Publication Number Publication Date
CN212929568U true CN212929568U (en) 2021-04-09

Family

ID=75327994

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021257977.9U Active CN212929568U (en) 2020-07-01 2020-07-01 Medium-low pressure underground gas pressure regulating device

Country Status (1)

Country Link
CN (1) CN212929568U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114060726A (en) * 2021-11-16 2022-02-18 浙江苍南仪表集团东星能源科技有限公司 Gas pressure regulating system
CN114151733A (en) * 2021-11-16 2022-03-08 瑞星久宇燃气设备(成都)有限公司 Direct-buried underground pressure regulating box
CN114216060A (en) * 2021-11-16 2022-03-22 浙江苍南仪表集团东星能源科技有限公司 Square buried pressure regulating box body and preparation method
CN117704288A (en) * 2023-12-28 2024-03-15 北京鑫丰泰燃气设备有限公司 Skid-mounted underground pressure regulating system
CN117704289A (en) * 2023-12-28 2024-03-15 北京鑫丰泰燃气设备有限公司 Remote control type underground pressure regulating system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114060726A (en) * 2021-11-16 2022-02-18 浙江苍南仪表集团东星能源科技有限公司 Gas pressure regulating system
CN114151733A (en) * 2021-11-16 2022-03-08 瑞星久宇燃气设备(成都)有限公司 Direct-buried underground pressure regulating box
CN114216060A (en) * 2021-11-16 2022-03-22 浙江苍南仪表集团东星能源科技有限公司 Square buried pressure regulating box body and preparation method
CN114151733B (en) * 2021-11-16 2024-06-04 瑞星久宇燃气设备(成都)有限公司 Direct-buried underground pressure regulating box
CN117704288A (en) * 2023-12-28 2024-03-15 北京鑫丰泰燃气设备有限公司 Skid-mounted underground pressure regulating system
CN117704289A (en) * 2023-12-28 2024-03-15 北京鑫丰泰燃气设备有限公司 Remote control type underground pressure regulating system

Similar Documents

Publication Publication Date Title
CN212929568U (en) Medium-low pressure underground gas pressure regulating device
CN204647860U (en) Underground pressure-regulating box
CN210771447U (en) Underground pressure regulating device with radial flow valve core
CN211183020U (en) Novel automatically controlled cabinet of heat dissipation and ventilation
CN205806942U (en) Gas underground pressure regulator
CN113719756A (en) Direct-buried underground pressure regulating box and using method thereof
CN205806943U (en) Underground pressure regulating box
CN211203669U (en) Integrated underground pressure regulating integrated device
CN209012792U (en) A kind of compressed natural gas pressure regulating gas station
CN217815189U (en) Vacuum pressure cap mounting structure
CN217635119U (en) Double-way underground gas pressure regulating box
CN214405641U (en) Intelligent buried gas metering device
CN110260158B (en) Radial flow valve core underground pressure regulating device
CN215891996U (en) Direct-buried underground pressure regulating box
CN216591090U (en) Gas underground pressure regulating box
CN204314985U (en) IC-card underground gas batch meter
CN210372889U (en) Intelligent gas underground pressure regulating device
CN217482540U (en) Composite cylinder type single-way intelligent underground gas pressure regulating device
CN107990148B (en) Novel gas pipeline siphon drainage device and method
CN208204559U (en) A kind of superpressure wet-type relief device
CN214886244U (en) Intelligent buried pipeline power generation device
CN217482541U (en) Double-cylinder type double-path intelligent underground gas pressure regulating box
CN215764641U (en) Direct-buried underground gas pressure regulating device
CN104235616A (en) Positive-negative pressure protector
CN112361222A (en) Intelligent buried gas metering device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address

Address after: 102212 No. 1 Changcui Road, Cuicun Town, Changping District, Beijing

Patentee after: Beijing Xinfengtai Gas Equipment Co.,Ltd.

Address before: 102500 No.1 changcui Road, cuicun Town, Haidian District, Beijing

Patentee before: BEIJING XINGUANGJIN GAS DEVICE Research Institute

CP03 Change of name, title or address