CN217082204U

CN217082204U - Underground gas pressure regulating box

Info

Publication number: CN217082204U
Application number: CN202123277448.2U
Authority: CN
Inventors: 王翔宇; 耿旭强
Original assignee: Tianjin Chris Gas Equipment Co ltd
Current assignee: Tianjin Chris Gas Equipment Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-07-29
Anticipated expiration: 2031-12-23

Abstract

The application relates to a gas pressure regulating box is used in underground, including main pressure regulating device, vice pressure regulating device, connecting portion, apron, import header, export header, inlet valve, outlet valve and chassis, main pressure regulating device and vice pressure regulating device all install the lower extreme at connecting portion, apron and connecting portion swing joint. The inlet valve and the outlet valve are respectively communicated with the main pressure regulating device and the auxiliary pressure regulating device, the inlet manifold is communicated with the inlet valve, the outlet manifold is communicated with the outlet valve, and the underframe is arranged at the lower ends of the auxiliary pressure regulating device and the main pressure regulating device. Through be provided with main pressure regulating device and vice pressure regulating device of the same structure on connecting portion, the main pressure regulating device and the vice pressure regulating device integration of using gas pressure regulating box in the underground of this public application embodiment form double-circuit structure in connecting portion. Thereby compare in the tradition and weld two single pass underground gas pressure regulating box and realize the mode of double-circuit and compare, alleviateed the construction degree of difficulty and the construction volume on-the-spot greatly.

Description

Underground gas pressure regulating box

Technical Field

The utility model relates to a gas equipment field especially relates to a gas pressure regulating box is used to underground.

Background

Most of the traditional gas pressure regulating boxes are arranged on the ground at present, but the gas pressure regulating boxes on the ground constructed according to the standard requirements often occupy larger land area and have the defect of land resource waste, and meanwhile, the gas pressure regulating boxes on the ground are mostly arranged beside roads to shield the sight, are easy to open by people and have the risk of illegally modifying parameters and cutting off gas. So when gas pressure regulating box convert from the above-ground formula scheme to underground formula scheme gradually, the underground gas pressure regulating box that uses is mostly to carrying out simple processing to gas pressure regulating box on the ground, mostly is single structure unchangeable, only reduces the space, compact size, and whole installation buries underground in the container again. Such underground gas pressure regulating box is inconvenient to maintain, and can only weld two devices on site when an one-open one-standby double-circuit structure commonly adopted in the field is realized, so that the difficulty of site construction is high.

Disclosure of Invention

In view of this, the application provides an underground gas pressure regulating device, has the double-circuit structure, effectively reduces the construction degree of difficulty and construction volume, and carries out integrated form design to the structure, is convenient for daily maintenance to be changed.

According to one aspect of the application, a gas pressure regulating device for underground use is provided, which comprises a main pressure regulating device, an auxiliary pressure regulating device, a connecting part, a cover plate, an inlet manifold, an outlet manifold, an inlet valve, an outlet valve and a bottom frame;

the connecting part is of a shell structure, and the main pressure regulating device and the auxiliary pressure regulating device are both arranged at the lower end of the connecting part; the cover plate is matched with the connecting part, and the cover plate is arranged at the upper end of the connecting part and is movably connected with the connecting part;

one end of each of the 2 inlet valves is respectively communicated with the main pressure regulating device and the auxiliary pressure regulating device, and the other end of each inlet valve is fixedly connected inside the connecting part; one end of each of the 2 outlet valves is respectively connected with the main pressure regulating device and the auxiliary pressure regulating device, and the other end of each outlet valve is fixedly connected inside the connecting part;

2 pipelines of the inlet manifold are respectively communicated with 2 inlet valves, and the inlet manifold is suitable for inputting fuel gas of an external pipe network into the main pressure regulating device and the auxiliary pressure regulating device; 2 pipelines of the outlet header are respectively communicated with 2 outlet valves, and the outlet header is suitable for outputting the gas after pressure regulation to a low-pressure pipe network;

the chassis is installed main pressure regulating device with vice pressure regulating device's lower extreme is connected main pressure regulating device and vice pressure regulating device, the chassis is applicable to and connects the ground.

In a possible implementation manner, the underground gas pressure regulating tank is characterized in that the main pressure regulating device comprises a pressure regulating device shell and a pressure regulating core; the upper end of the pressure regulating device shell is fixedly connected with the connecting part, and the underframe is arranged at the lower end of the pressure regulating device shell; the pressure regulating core is inserted in the pressure regulating device shell;

the pressure regulating core comprises a monitoring pressure regulating director, a working pressure regulating director, a cutting driver, a cutting valve seat, a cutting spring, a guide seat, a pressure regulating core upper shell, a pressure regulating core lower shell, a working pressure regulator, a monitoring pressure regulator and a filter element;

the pressure regulating core upper shell is fixedly connected with the pressure regulating core lower shell to form a sealed cavity; a channel is arranged at the middle position of the upper shell of the pressure regulating core and the middle position of the lower shell of the pressure regulating core, and the channel of the upper shell of the pressure regulating core is communicated with the channel of the lower shell of the pressure regulating core;

the monitoring voltage regulator and the working voltage regulator are sequentially arranged in the pressure regulating core shell from top to bottom; the cutting-off driver is installed at the upper end of the upper shell of the pressure regulating core, the lower end of the cutting-off driver is provided with a valve rod, and the valve rod penetrates through a channel of the upper shell of the pressure regulating core and a channel of the lower shell of the pressure regulating core and is connected with the cutting-off valve seat; the guide seat is arranged at the lower end of the pressure regulating core shell and is connected with the cutting valve seat; the cutting spring is arranged between the cutting valve seat and the guide seat and is in contact with the cutting valve seat and the guide seat;

the working pressure regulating commander is connected with the working pressure regulator, and the monitoring pressure regulator is connected with the monitoring pressure regulating commander;

the filter element is arranged at the lower end of the lower shell of the pressure regulating core;

the main pressure regulating device and the auxiliary pressure regulating device have the same structure.

In one possible implementation mode, the working voltage regulator is installed on a channel of the lower shell of the voltage regulating core and comprises an upper squirrel cage, a lower squirrel cage, a leather sleeve and a working voltage regulator shell; the upper squirrel cage, the working pressure regulator shell and the lower squirrel cage are sequentially connected from top to bottom on the periphery of the channel of the pressure regulating core lower shell, one end of the leather sleeve is connected with the working pressure regulator, and the other end of the leather sleeve is attached to the outer wall of the channel of the pressure regulating core lower shell;

the work pressure regulating commander is provided with a first pressure pipe, the first pressure pipe of pressing is connected the import pipe of work pressure regulator.

In one possible implementation, the monitoring pressure regulator comprises a main leather diaphragm, an upper clamping disc, a lower clamping disc, a sleeve, a return spring and a valve core partition plate; the valve core separation plate is fixedly connected to the upper end of the pressure regulating core lower shell, the sleeve is inserted into a channel of the pressure regulating core lower shell, the lower clamping disc and the upper clamping disc are sequentially sleeved with the sleeve, and the upper clamping disc is attached to the lower clamping disc; the main leather membrane is arranged between the upper clamping disc and the lower clamping disc; the reset spring is arranged in the sleeve, is attached to the upper end of the upper shell of the pressure regulating core, and surrounds the valve rod of the cut-off driver;

the monitoring pressure regulating commander is provided with a second pressure tapping pipe, and the second pressure tapping pipe is connected with the inlet end of the monitoring pressure regulator.

In one possible implementation, the device further comprises a bleeding device, wherein the bleeding device comprises a bleeding valve and a bleeding pipe; the bleeding valve is arranged at the upper end of the pressure regulating core upper shell and communicated with the low-pressure end of the main pressure regulating device; the diffusion pipe is arranged outside the pressure regulating device shell, and the diffusion valve is communicated with the diffusion pipe.

In a possible implementation mode, the device further comprises an emptying device, the emptying device comprises an emptying joint and an emptying pipe, the emptying joint is arranged inside the pressure regulating device shell, the emptying pipe is arranged outside the pressure regulating device shell, and the emptying pipe is communicated with the emptying joint.

In a possible implementation mode, the device further comprises a valve handle and a pressure regulating core handle, wherein 2 valve handles are positioned above the pressure regulating core and are respectively connected with the inlet valve and the outlet valve; 2 the pressure regulating core handles are arranged on the pressure regulating core upper shell.

In a possible implementation manner, a drain valve and a detection hole are further arranged on the pressure regulating device shell, the drain valve and the detection hole are both arranged at the bottom end of the pressure regulating device shell, and the detection hole is located above the drain valve.

In a possible implementation manner, an inlet pressure gauge, an outlet pressure gauge, a differential pressure gauge and a pressure obtaining device are further arranged in the pressure regulating device shell.

In a possible implementation manner, a gas spring is installed between the cover plate and the connecting part; the cover plate is provided with a cover lock; a window is arranged at the upper end of the connecting part, and is matched with the connecting part and fixedly connected with the connecting part;

and the emptying pipe is also provided with an instrument box and a photovoltaic power supply device.

Through being provided with the main pressure regulating device and the vice pressure regulating device of looks isostructure on connecting portion, 2 pipelines of import collection pipe communicate main pressure regulating device and vice pressure regulating device, and 2 pipelines of export collection pipe communicate main pressure regulating device and vice pressure regulating device, and the main pressure regulating device and the vice pressure regulating device integration of the underground gas pressure regulating box of this application embodiment of disclosing form the double-circuit structure in connecting portion. One path of the main pressure regulating device is set as a working path, and one path of the auxiliary pressure regulating device is set as a standby path. Thereby compare in the tradition and weld two single pass underground gas pressure regulating box and realize the mode of double-circuit and compare, alleviateed the construction degree of difficulty and the construction volume on-the-spot greatly. And the pressure regulating core integrates the filter element of the pressure regulating device, the cut-off driver, the working pressure regulator, the monitoring pressure regulator and other devices, the whole volume of the device is reduced, the weight of air leakage points and the device is reduced, the cost is reduced, and the integrated pressure regulating core is inserted in the shell of the pressure regulating device, can be integrally provided when a fault occurs, and is more convenient to maintain and replace compared with the pressure regulating device with the traditional structure.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

FIG. 1 illustrates a front view of an underground gas surge tank of an embodiment of the present application;

FIG. 2 shows a left side view of an underground gas surge tank of an embodiment of the present application;

FIG. 3 illustrates a top view of an underground gas surge tank of an embodiment of the present application;

FIG. 4 shows a blow-down tube schematic of an embodiment of the present application;

fig. 5 shows a schematic view of a cover plate of an embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.

Fig. 1-5 show a front view of an underground gas surge tank, a left side view of the underground gas surge tank, a top view of the underground gas surge tank, a vent 36, a vent 35, and a cover 4, according to an embodiment of the present application. As shown in fig. 1 to 5, the underground gas pressure-regulating tank includes:

the device comprises a main pressure regulating device 1, an auxiliary pressure regulating device 2, a connecting part 3, a cover plate 4, an inlet header 5, an outlet header 6, an inlet valve 7, an outlet valve 8 and an underframe 9.

Wherein, connecting portion 3 is shell structure, and main pressure regulating device 1 and vice pressure regulating device 2 are all installed at the lower extreme of connecting portion 3, and apron 4 and connecting portion 3 phase-match, apron 4 are installed in the upper end of connecting portion 3, with connecting portion 3 swing joint. Specifically, apron 4 passes through hinge connection with connecting portion 3, and apron 4 can be through the hinge and do rotation motion about connecting portion 3's upper end, and apron 4 can tightly cover connecting portion 3 when laminating with connecting portion 3 for connecting portion 3 and apron 4 form airtight space, and in actual production, still be provided with the sealing strip between apron 4 and connecting portion 3, in order to reach better sealed effect. The four side walls of the connecting part 3 and the bottom plate of the connecting part 3 adopt a sealing and waterproof mode of glue sealing.

One end of each inlet valve 7 is communicated with the main pressure regulating device 1 and the auxiliary pressure regulating device 2 respectively, the other end of each inlet valve 7 is fixedly connected inside the connecting portion 3, specifically, each inlet valve 7 is connected through a flange and installed on the main pressure regulating device 1 and the auxiliary pressure regulating device 2 respectively, the upper end of each inlet valve 7 penetrates through the bottom end of the connecting portion 3, and the bottom end of the connecting portion 3 is sleeved with the upper end of each inlet valve 7. One end of each of the 2 outlet valves 8 is connected with the main pressure regulating device 1 and the auxiliary pressure regulating device 2, and the other end is fixedly connected inside the connecting part 3. Specifically, 2 outlet valves 8 are respectively installed on the main pressure regulating device 1 and the auxiliary pressure regulating device 2 through flange connection, and the upper ends of the outlet valves 8 penetrate through the bottom ends of the connecting parts 3 and are sleeved at the bottom ends of the connecting parts 3. I.e. opening and closing of the outlet valve 8 and the inlet valve 7 can be performed in the connection portion 3.

2 pipelines of the inlet manifold 5 are respectively communicated with 2 inlet valves 7, and the inlet manifold 5 is suitable for inputting the fuel gas of an external pipe network into the main pressure regulating device 1 and the auxiliary pressure regulating device 2. Specifically, the connected mode adopts flange joint, simple structure, and the realization of being convenient for, 2 pipelines of export manifold 6 communicate 2 outlet valve 8 respectively, and export manifold 6 is applicable to and exports the gas after the pressure regulating to the low pressure pipe network, and its connected mode also can adopt flange joint.

The chassis 9 is of a plate-shaped structure, and the chassis 9 is arranged on the main pressure regulating device 1 and the auxiliary pressure regulating device 2 and is connected with the main pressure regulating device 1 and the auxiliary pressure regulating device 2. Specifically, the connection mode can be welding or threaded connection, and the specific connection mode is not limited here, and only needs to be designed reasonably. The base frame 9 is adapted to be connected to a foundation so that the underground gas pressure regulating tank is installed in the foundation in the field construction.

Further, main regulator 1 includes regulator casing 10 and pressure regulating core 23, and wherein, the upper end and the 3 fixed connection of connecting portion of regulator casing 10, it is concrete, the connected mode adopts threaded connection or bolted connection, does not prescribe a limit herein, and during actual production, the hookup location department of regulator casing 10 and connecting portion 3 still is provided with the strengthening rib version to reach the intensity and the rigidity of reinforcing junction. The chassis 9 is installed at the lower extreme of regulator casing 10, and the inside at regulator casing 10 is inserted to pressure regulating core 23, and is specific, be rotatory open connection between pressure regulating core 23 and the regulator casing 10 to the maintenance of pressure regulating core 23 is changed.

The pressure regulating core 23 comprises a monitoring pressure regulating director 11, a working pressure regulating director 12, a cutting driver 13, a cutting valve seat 15, a cutting spring 16, a guide seat 17, a pressure regulating core upper shell 18, a pressure regulating core lower shell 19, a working pressure regulator 20, a monitoring pressure regulator 21 and a filter element 22.

Wherein, casing 18 and the lower casing 19 fixed connection of pressure regulating core on the pressure regulating core, the connected mode can adopt bolted connection, through bolted connection, and casing 18 and the lower casing 19 of pressure regulating core enclose to establish and form sealed cavity on the pressure regulating core. The middle position of the pressure regulating core upper shell 18 and the middle position of the pressure regulating core lower shell 19 are both provided with channels, and the channels of the pressure regulating core upper shell 18 are communicated with the channels of the pressure regulating core lower shell 19.

The monitoring pressure regulator 21 and the working pressure regulator 20 are sequentially installed inside a cavity formed by an upper shell and a lower shell of the pressure regulating core from top to bottom, specifically, the installation position of the cut-off driver 13 is located at the upper end of the upper shell 18 of the pressure regulating core, the lower end of the cut-off driver 13 is provided with a valve rod, the valve rod penetrates through a channel of the upper shell 18 of the pressure regulating core and a channel of the lower shell 19 of the pressure regulating core and is connected with the cut-off valve seat 15, the guide seat 17 is arranged at the lower end of the lower shell 19 of the pressure regulating core, the connection cut-off valve seat 15 is connected, and the cut-off spring 16 is arranged between the cut-off valve seat 15 and the guide seat 17 and is contacted with the cut-off valve seat 15 and the guide seat 17.

The working pressure regulating director 12 is connected with the working pressure regulator 20, and the monitoring pressure regulator 21 is connected with the monitoring pressure regulating director 11.

The lower extreme at casing 19 is installed under the pressure regulating core to filter core 22, and is concrete, and the connected mode can be for joint or splice, only need reasonable in design can, does not restrict here. The main pressure regulating device 1 and the auxiliary pressure regulating device 2 have the same structure and are arranged in parallel in the connecting part 3.

From this, the underground gas pressure regulating box of this embodiment of the disclosure, through being provided with main pressure regulating device 1 and vice pressure regulating device 2 of the same structure on connecting portion 3, 2 pipelines of import header 5 communicate main pressure regulating device 1 and vice

pressure regulating device

2, 2 pipelines of export header 6 communicate main pressure regulating device 1 and vice pressure regulating device 2 to directly integrate main pressure regulating device 1 and vice pressure regulating device 2 in connecting portion 3, form the double-circuit structure, wherein, set up main pressure regulating device 1 all the way as the working road, set up vice pressure regulating device 2 all the way as the reserve road. Thereby compare in the tradition and weld two single pass underground gas pressure regulating box and realize the mode of double-circuit and compare, alleviateed the construction degree of difficulty and the construction volume on-the-spot greatly. And the pressure regulating core 23 integrates the filter element 22 of the pressure regulating device, the cut-off driver 13, the working pressure regulator 20, the monitoring pressure regulator 21 and other devices, so that the overall size of the device is reduced, the weight of air leakage points and the device is reduced, the cost is reduced, and the integrated pressure regulating core 23 is inserted into the shell 10 of the pressure regulating device, can be integrally provided when a fault occurs, and is more convenient to maintain and replace compared with the pressure regulating device with the traditional structure.

In one possible implementation, the working voltage regulator 20 is mounted on the passage of the lower shell 19 of the regulating core, and comprises an upper squirrel cage 24, a lower squirrel cage 25, a leather sheath 26 and a working voltage regulator shell 27. Go up squirrel cage 24, work voltage regulator casing 27 and squirrel cage 25 and connect gradually from last to down in the passageway periphery of casing 19 under the pressure regulating core, and be linked together with the passageway of casing 19 under the pressure regulating core, work voltage regulator casing 27 is connected to the one end of leather sheath 26, and the other end is laminated mutually with the outer wall of the passageway of casing 19 under the pressure regulating core. Work pressure regulating commander 12 is provided with the first pipe of pressing, and the first import pipe of pressing the pipe connection work pressure regulator 20 of pressing, and is concrete, and the first pipe of pressing links to each other with the import high-pressure end of work pressure regulator 20, provides control pressure for the work commander, and the drive pressure of work commander links to each other with the control room of work pressure regulator 20 through the control tube, plays the effect of control work pressure regulator 20 export pressure.

In one possible implementation, the monitor pressure regulator 21 includes a main diaphragm 28, an upper clamp disk 29, a lower clamp disk 30, a sleeve 31, a return spring 32, and a spool divider plate 33. The valve core separation plate 33 is fixedly connected to the upper end of the pressure regulating core lower shell 19, the sleeve 31 is inserted into a channel of the pressure regulating core lower shell 19, the lower clamping disc 30 and the upper clamping disc 29 are sequentially sleeved with the sleeve 31, and the upper clamping disc 29 is attached to the lower clamping disc 30. A main skin 28 is arranged between an upper clamping disk 29 and a lower clamping disk 30; the return spring 32 is installed inside the sleeve 31, attached to the upper end of the pressure regulating core upper case 18, and surrounds the sleeve of the cut-off actuator 13. The voltage regulator with such a structure is of a fail-close type, and the principle thereof is common knowledge in the field, and is not described herein again.

The monitoring pressure regulating commander 11 is provided with a second pressure tapping pipe which is connected with the inlet end of the monitoring pressure regulator 21. The second pressure pipe of getting links to each other with the high-pressure side of the import of control voltage regulator 21, provides control pressure for control voltage regulation commander 11, and control voltage commander 11's driving pressure links to each other with the control room of control voltage regulator 21 through the control pressure pipe, plays the effect of control voltage regulator 21 export pressure.

In a possible implementation, a bleeding device is further included, and the bleeding device includes a bleeding valve 34 and a bleeding pipe 35. Wherein, diffuse valve 34 sets up the upper end at pressure regulating core upper shell 18, and the low pressure end of main pressure regulating device 1 of intercommunication diffuses the outside that pipe 35 set up at pressure regulating device casing 10, diffuses valve 34 and passes through metal collapsible tube and diffuse pipe 35 intercommunication, and when diffusing, gaseous diffuses to the outside through diffusing valve 34 and guarantees the safety of underground gas pressure regulating box.

In a possible implementation mode, still include venting device, venting device includes that venting connects and blow-down pipe 36, venting connects the inside of setting at pressure regulating device casing 10, venting pipe 36 sets up the outside at pressure regulating device casing 10, venting pipe 36 connects through metal collapsible tube intercommunication venting, can keep pressure regulating device casing 10 and external atmosphere to communicate with each other, when the device takes place to leak, can lead to the gas of leaking to the atmospheric venting in the outside, safety has been guaranteed, and is concrete, in actual course of working, the upper end of blow-down pipe still only has rain-proof cap 38.

In a possible implementation manner, the pressure regulating valve further comprises a valve handle 37 and a pressure regulating core handle 49, wherein 2 valve handles 37 are located above the pressure regulating core 23 and are respectively connected with the inlet valve 7 and the outlet valve 8, specifically, the valve handle 37 is connected with the inlet valve 7 and the outlet valve 8 through valve rods, and the opening and closing of the inlet valve 7 and the outlet valve 8 are facilitated by arranging the valve handle 37. In actual operation, if the pressure regulating core 23 needs to be taken out, the inlet valve 7 and the outlet valve 8 need to be closed through the valve handle 37, and then the next step of disassembly can be performed, so that the function of preventing misoperation is achieved. 2 pressure regulating core handles 49 are installed on pressure regulating core upper shell 18, and through setting up pressure regulating core handles 49, can take out pressure regulating core 23 more conveniently, simple structure is convenient for realize.

In a possible implementation manner, the pressure regulating device housing 10 is further provided with a blowdown valve 39 and a detection hole 40, the blowdown valve 39 and the detection hole 40 are both arranged at the bottom end of the pressure regulating device housing 10, and the detection hole 40 is positioned above the blowdown valve 39. The blowdown valve 39 is arranged, so that accumulated dirt after gas filtration can be discharged more conveniently, and the filtered gas can be detected conveniently before leaving a factory by arranging the detection hole 40.

In a possible implementation, an inlet pressure gauge 41, an outlet pressure gauge 42, a differential pressure gauge 43 and a pressure-measuring device 44 are also arranged in the pressure-regulating device housing 10. The inlet pressure gauge 41 is connected with the high-pressure end of the inlet of the pressure regulating device shell 10 through a pipeline to display inlet pressure, one end of the differential pressure gauge 43 is connected with the inlet pressure gauge 41 to obtain unfiltered high-pressure gas, and the other end of the differential pressure gauge is connected with the filtered high-pressure end to obtain filtered high-pressure gas, so that the cleanness degree of the filter element 22 can be measured. The pressure pick-up 44 picks up the regulator outlet pressure by connecting to the low pressure end of the regulator housing 10.

In a possible implementation mode, a gas spring 45 is installed between the cover plate 4 and the connecting portion 3, and the cover plate 4 is convenient to lift by arranging the gas spring 45, so that the cover plate 4 can be prevented from falling back when equipment is maintained, and the safety of maintenance personnel is ensured. The cover plate 4 is provided with the cover lock 14, and the user connecting part 3 of the cover plate 4 can be locked by the cover lock 14, so that malicious opening is prevented. The upper end of the connecting part 3 is provided with a window 46, and the window 46 is made of high-strength transparent material. The window 46 is matched with the connecting portion 3 and fixedly connected with the connecting portion 3, specifically, the connecting manner may be a bolt connection. Through setting up window 46, can be convenient for observe the instrument in the regulator casing 10, and play sealed dustproof waterproof effect of keeping apart.

An instrument box 47 and a photovoltaic power supply device 48 are further mounted on the emptying pipe 36, and an integrated electronic instrument is arranged in the instrument box 47. The electronic instrument is in signal connection with the signal unit inside the underground gas pressure regulating tank, and the specific connection mode can be the existing connection mode, which is common knowledge in the field and is not described herein again. Further, the meter box 47 is provided with a meter box door and a fingerprint lock, so that safety management is facilitated. The instrument box 47 may be mounted to the vent tube 36 or may be separately mounted to a separate stand. The instrument box 47 has the following features: 1. the internal integrated electronic instrument is integrated, can be connected with multiple signals, such as signals of temperature, pressure, flow, leakage alarm, cut-off state, diffusion state and the like, and can be displayed on the liquid crystal screen in real time; 2. the recording frequency can be set, the recorded parameters can be stored, the operation records can be stored, the related authority can be set for reading and deleting the stored parameters and the operation records, and the data can be conveniently checked and ensured to be real; 3. the USB interface is arranged and can be connected with the mobile storage equipment and the computer, so that data can be conveniently exported and system parameters can be conveniently modified; 4. the external signal wire can also be remotely transmitted to the monitoring room computer in a wireless mode through external equipment, and when the running condition of the equipment is abnormal and relevant parameters (such as temperature, pressure, internal storage capacity and the like) reach set values, sound and light alarm can be realized on the integrated instrument and the monitoring room computer; 5. Each integrated meter has a unique hardware digital signature that ensures that the modified parameters can only be manipulated by a designated professional on the integrated meter or connected computer. 6. The integrated electronic instrument installed on site is an explosion-proof product. The photovoltaic power supply device 48 is electrically connected with the instrument box 47, and can supply power to the instrument box 47.

The working principle and the working process of the underground gas pressure regulating box of the embodiment of the disclosure are as follows: when the outlet load changes, the underground gas pressure regulating tank can automatically regulate the opening degree of the working pressure regulator 20 to ensure that the outlet pressure is stabilized within a set pressure value range. The gas regulated by the working pressure regulator 20 is used as a feedback signal and is led to the working pressure regulation commander 12 through a pressure taking line, any deviation of the outlet pressure and a set value changes the control pressure of the working pressure regulation commander 12, the control pressure acts on the main skin 28 of the working pressure regulator 20 through the control pressure line (when the outlet pressure is reduced, the control pressure is increased, the opening degree of the valve port of the working pressure regulator 20 is increased, the outlet pressure of the working pressure regulator 20 is increased, the flow is increased, when the outlet pressure is increased, the control pressure is reduced, the opening degree of the valve port of the working pressure regulator 20 is reduced, the outlet pressure of the working pressure regulator 20 is reduced, the flow is reduced), meanwhile, the outlet pressure of the working pressure regulator 20 acts on the other side of the main skin 28 of the working pressure regulator 20 through the pressure taking line (when the outlet pressure is reduced, the opening degree of the working pressure regulator 20 is increased, when the outlet pressure is increased, the pressure acting on the main leather film 28 is increased, so that the opening degree of a valve port of the working pressure regulator 20 is reduced, and the control pressure has a synergistic effect on the working pressure regulator 20, so that the pressure regulator reacts more quickly and sensitively), and the outlet pressure of the working pressure regulator 20 is stabilized in a set pressure range.

When the downstream load is increased, the outlet pressure of the underground gas pressure regulating tank is reduced, the reduced outlet pressure enters the work pressure regulating commander 12 through the pressure taking pipe of the work pressure regulating commander 12, the control pressure is increased after automatic regulation, the increased control pressure enters the control chamber of the work pressure regulator 20 through the control pipe and acts on one side of the main diaphragm 28 to increase the opening degree of the valve port of the work pressure regulator 20, meanwhile, the reduced outlet pressure enters the work pressure regulator 20 through the pressure taking pipe and acts on the other side (the side opposite to the control pressure) of the main diaphragm 28 to enable the main diaphragm 28 to drive the valve port to move in the direction away from the valve seat, so that the opening degree of the valve port of the work pressure regulator 20 is increased, and the outlet pressure of the work pressure regulator 20 is increased to a set value.

When the downstream load is reduced, the outlet pressure of the underground gas pressure regulating tank is increased, the increased outlet pressure enters the work pressure regulating commander 12 through the pressure taking pipe of the work pressure regulating commander 12, the control pressure is reduced after automatic regulation, the reduced control pressure enters the control chamber of the work pressure regulator 20 through the control pipe and acts on one side of the main diaphragm 28 to reduce the opening degree of the valve port of the work pressure regulator 20, meanwhile, the increased outlet pressure enters the work pressure regulator 20 through the pressure taking pipe and acts on the other side (the side opposite to the control pressure) of the main diaphragm 28 to enable the main diaphragm 28 to drive the valve port to move towards the valve seat direction, so that the opening degree of the valve port of the work pressure regulator 20 is reduced, and the outlet pressure of the work pressure regulator 20 is reduced to a set value.

When the outlet load is zero and the user is no longer using gas, the outlet pressure increases to a level where the force of the pilot control pressure on the diaphragm is less than the sum of the outlet pressure and the force of return spring 32, and the valve port of pressure regulator 20 is fully closed.

When the set value of the monitoring pressure regulating commander 11 is higher than the set value of the working pressure regulating commander 12, the pressure signal after pressure regulation by the working pressure regulator 20 is fed back to the monitoring pressure regulating commander 11, the control pressure after automatic regulation is raised to the degree of completely opening the valve port of the monitoring pressure regulator 21, the monitoring pressure regulator 21 is in a fully opened monitoring state, when the working pressure regulator 20 breaks down, the valve port is fully opened, and when the pressure is raised to the set value of the monitoring pressure regulating commander 11, the monitoring pressure regulator 21 starts to replace the working pressure regulator 20 to enter the working state, so as to control the outlet pressure of the underground gas pressure regulating tank, and at the moment, the outlet pressure is slightly raised (depending on the setting of the monitoring pressure regulator 21).

When the outlet pressure of the underground gas pressure regulating tank fluctuates or the outlet pressure rises to exceed the set value of the bleeding valve 34 due to the fault of the pressure regulator, the valve port of the bleeding valve 34 is opened, and the gas enters the bleeding pipe 35 through the bleeding valve 34 and is diffused into the atmosphere; when the outlet pressure of the gas pressure regulating device falls back to be slightly lower than the set value of the bleeding valve 34, the bleeding valve 34 is automatically closed.

It should be noted that, although the underground gas pressure regulating tank is described above by taking fig. 1 to 5 as an example, those skilled in the art will understand that the present application should not be limited thereto. In fact, the user can flexibly set the structure according to personal preference and/or actual application scene, and only needs to meet the requirement.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A gas pressure regulating box for underground use is characterized by comprising a main pressure regulating device, an auxiliary pressure regulating device, a connecting part, a cover plate, an inlet manifold, an outlet manifold, an inlet valve, an outlet valve and a bottom frame;

2. The underground gas pressure regulating tank of claim 1, wherein the main pressure regulating device comprises a pressure regulating device housing and a pressure regulating core; the upper end of the pressure regulating device shell is fixedly connected with the connecting part, and the underframe is arranged at the lower end of the pressure regulating device shell; the pressure regulating core is inserted in the pressure regulating device shell;

the pressure regulating core comprises a monitoring pressure regulating director, a working pressure regulating director, a cutting driver, a cutting valve seat, a cutting spring, a guide seat, an upper pressure regulating core shell, a lower pressure regulating core shell, a working pressure regulator, a monitoring pressure regulator and a filter element;

3. The underground gas pressure regulating tank as claimed in claim 2, wherein the working pressure regulator is mounted on the passage of the lower shell of the pressure regulating core and comprises an upper squirrel cage, a lower squirrel cage, a leather sleeve and a working pressure regulator shell; the upper squirrel cage, the working pressure regulator shell and the lower squirrel cage are sequentially connected from top to bottom on the periphery of the channel of the pressure regulating core lower shell, one end of the leather sleeve is connected with the working pressure regulator, and the other end of the leather sleeve is attached to the outer wall of the channel of the pressure regulating core lower shell;

4. The underground gas pressure regulating tank as claimed in claim 2, wherein the monitoring pressure regulator comprises a main diaphragm, an upper clamping disk, a lower clamping disk, a sleeve, a return spring and a valve core partition plate; the valve core separation plate is fixedly connected to the upper end of the pressure regulating core lower shell, the sleeve is inserted into a channel of the pressure regulating core lower shell, the lower clamping disc and the upper clamping disc are sequentially sleeved with the sleeve, and the upper clamping disc is attached to the lower clamping disc; the main leather membrane is arranged between the upper clamping disc and the lower clamping disc; the reset spring is arranged in the sleeve, is attached to the upper end of the upper shell of the pressure regulating core, and surrounds the valve rod of the cut-off driver;

5. The underground gas pressure regulating tank as claimed in claim 2, further comprising a bleeding device, the bleeding device comprising a bleeding valve and a bleeding pipe; the bleeding valve is arranged at the upper end of the pressure regulating core upper shell and communicated with the low-pressure end of the main pressure regulating device; the diffusion pipe is arranged outside the pressure regulating device shell, and the diffusion valve is communicated with the diffusion pipe.

6. The underground gas pressure regulating tank as claimed in any one of claims 2 to 5, further comprising an emptying device, wherein the emptying device comprises an emptying joint and an emptying pipe, the emptying joint is arranged inside the pressure regulating device shell, the emptying pipe is arranged outside the pressure regulating device shell, and the emptying pipe is communicated with the emptying joint.

7. The underground gas pressure regulating tank as claimed in claim 6, further comprising valve handles and pressure regulating core handles, wherein 2 of the valve handles are located above the pressure regulating core and are respectively connected with the inlet valve and the outlet valve; 2 the pressure regulating core handles are arranged on the pressure regulating core upper shell.

8. The underground gas pressure regulating box according to claim 6, wherein a drain valve and a detection hole are further arranged on the pressure regulating device shell, the drain valve and the detection hole are both arranged at the bottom end of the pressure regulating device shell, and the detection hole is positioned above the drain valve.

9. The underground gas pressure regulating tank as claimed in claim 6, wherein an inlet pressure gauge, an outlet pressure gauge, a differential pressure gauge and a pressure sampling device are further arranged in the pressure regulating device housing.

10. The underground gas pressure regulating tank as claimed in claim 6, wherein a gas spring is installed between the cover plate and the connecting part; the cover plate is provided with a cover lock; a window is arranged at the upper end of the connecting part, and is matched with the connecting part and fixedly connected with the connecting part;