Outer box structure of composite cylindrical dual-circuit underground gas pressure regulating box

Abstract

The present application relates to an outer box structure of a composite cylinder-type dual-path underground gas pressure regulating box, including: an outer shell box, a pressure regulating pipeline and a pressure-bearing connecting pipe. The pressure regulating pipeline is two arranged in parallel, including a main cylinder and an auxiliary cylinder. The upper part of the main cylinder is open, and there is a high-pressure chamber inside, which is connected to the inlet pipeline. The bottom of the main cylinder is provided with a connecting hole. The auxiliary cylinder is arranged on one side and outside the bottom of the main cylinder, and there is a low-pressure chamber inside, which is connected to the high-pressure chamber through the connecting hole. The low-pressure chamber is connected to the outlet pipeline. The outer shell box covers the two pressure regulating pipelines. There are two pressure-bearing connecting pipes. The upper end of the pressure-bearing connecting pipe is fixedly connected to the upper top plate of the outer shell box, and the lower end matches the opening of the main cylinder and is fixedly connected. The upper top plate of the outer shell box is located on the pressure-bearing connecting pipe and is suitable for installing a pressure regulating core. By using the pressure-bearing connecting pipe to bear the weight of the integrated pressure regulating core to be installed, the problem of the two main cylinders not being able to meet the welding requirements and the poor structural strength is solved.

Description

Technical Field

[0001] The present application relates to the field of gas transmission and distribution, and in particular to an outer box structure of a composite cylindrical dual-path underground gas pressure regulating box. Background Art

[0002] With the development of the economy and society, gas has become widely used, and with it, gas pressure regulating boxes, essential components of gas transmission and distribution systems. Traditional above-ground pressure regulating boxes utilize pipe flange connections, occupying significant space above ground and requiring high safety clearances. The design and site selection for these boxes must meet both safety clearance requirements and be within the building boundary. In today's urban construction landscape, where land is at a premium, areas meeting these requirements are rare, making site selection challenging. Consequently, underground gas pressure regulating boxes, which require less safety clearances, have emerged.

[0003] In the actual use of underground pressure regulating boxes, integrated gas underground pressure regulating boxes that can bear weight, are waterproof and sealed, take up little space, have an integrated design, and are easy to maintain and repair are increasingly recognized by users and relevant management units, representing the development direction of underground pressure regulating boxes.

[0004] The outer shell of the underground pressure regulating box is connected to the inlet and outlet valves, providing space for the gas flow path and the installation of the integrated pressure regulating device. It is in contact with the gas inside and the soil outside. It has the ability to withstand the gas pressure, the surrounding soil pressure and the load caused by pedestrians and vehicles stepping on and crushing the equipment. It is an important component required to ensure the safe operation of the underground pressure regulating box.

[0005] In the existing technology, the integration of underground gas pressure regulating boxes is getting higher and higher, and two pressure regulating cores with the same configuration have been adopted, which are integrated in the same outer shell, that is, a common configuration of "one open and one standby" is realized. For dual-circuit gas pressure regulating equipment with higher integration, the dual-circuit gas pressure regulating equipment needs to be equipped with two sets of pressure-bearing cylinders in a limited space. However, the highly integrated outer shell makes it impossible to weld the middle part of the two cylinders to meet the requirements. There is a lack of a dual-circuit underground pressure regulating equipment with high integration while ensuring sufficient structural strength of the whole machine. Summary of the Invention

[0006] In view of this, the present application proposes an outer box structure of a composite cylinder type dual-path underground gas pressure regulating box, comprising an outer shell and a pressure regulating pipeline; the number of the pressure regulating pipelines is two, which are arranged in parallel, and the outer shell covers the two pressure regulating pipelines; the pressure regulating pipeline comprises a main cylinder and a secondary cylinder; the upper part of the main cylinder is open, and the interior has a high-pressure chamber located at the upper part and a part of the low-pressure chamber located at the lower part; the main cylinder is connected to the inlet pipeline, and a connecting hole is provided between the high-pressure chamber and part of the low-pressure chamber; the secondary cylinder is connected to the inlet pipeline, and a connecting hole is provided between the high-pressure chamber and part of the low-pressure chamber; The cylinder is arranged on one side of the main cylinder, and the interior is the remaining part of the low-pressure chamber connected to part of the low-pressure chamber. It is connected to part of the low-pressure chamber in the main cylinder through the vent or vent groove opened on the main cylinder, and the low-pressure chamber is connected to the outlet pipeline; a pressure-bearing connecting pipe is provided above each main cylinder, the upper end of the pressure-bearing connecting pipe is sealed with the upper top plate of the outer shell box, and the lower end matches the opening of the main cylinder, and is sealed with the upper side wall of the main cylinder.

[0007] In a possible implementation, the axial height of the pressure-bearing connecting pipe is greater than the thickness of the upper top plate; and the side wall thickness of the pressure-bearing connecting pipe is greater than the side wall thickness of the main cylinder.

[0008] In a possible implementation, two pressure regulating core mounting holes are provided on the upper top plate, and the upper end of the pressure-bearing connecting pipe is welded and fixed to the corresponding pressure regulating core mounting holes on the upper top plate.

[0009] In a possible implementation, the two main cylinders are attached to each other or arranged close to each other.

[0010] In a possible implementation, a pad is further included; a plurality of fixing holes are provided around the outer side of the pressure regulating core mounting hole, and pads are added at the positions where the fixing holes are provided on the upper top plate; the same fixing holes are provided on the pads, and they do not interfere with the pressure regulating core.

[0011] In a possible implementation, the thickness of the upper top plate is between [15 mm, 25 mm]; the thickness of the side wall of the main cylinder is approximately half the thickness of the pressure-bearing connecting pipe, and the two are made of the same material.

[0012] In one possible implementation, the secondary cylinder is covered and arranged on the opposite side of the main cylinder where it is connected to the inlet pipeline, and the outlet pipeline is arranged relative to the inlet pipeline; the main cylinder includes a main cylinder side panel and a partition plate; the main cylinder side panel is a cylindrical plate with a hollow interior, and the bottom is welded and fixed to the bottom of the outer casing, and the vent hole or the vent groove is provided at the bottom of the main cylinder side panel near the side of the outlet pipeline; the partition plate is welded and fixed to the main cylinder side panel near the bottom position, and matches the position structure of the main cylinder side panel, and the connecting hole is provided at the center of the partition plate.

[0013] In a possible implementation, the side of the secondary cylinder covering the main cylinder includes a secondary cylinder sealing plate, a secondary cylinder side panel and a bottom secondary cylinder sealing plate that are sealed with the main cylinder, and the opposite side of the secondary cylinder covering the main cylinder shares a common wall with the main cylinder; wherein, one end of the secondary cylinder sealing plate matches the structure of the main cylinder side panel and is welded and fixed to the outside of the main cylinder side panel, and the other end of the secondary cylinder sealing plate is welded and fixed to the secondary cylinder side panel; the secondary cylinder side panel is an arc-shaped plate, and the radius of the secondary cylinder side panel is smaller than that of the main cylinder The radius of the main cylinder side panel, the bottom edge of the secondary cylinder side panel is a straight structure or a convex arc structure, and the lowermost end of the secondary cylinder side panel is welded to the bottom of the outer shell box; the outer edge of the bottom secondary cylinder cover plate close to the inlet pipeline side matches the bottom structure of the main cylinder side panel, and the outer edge close to the outlet pipeline side matches the bottom structure of the secondary cylinder side panel, that is, part of the bottom cylinder cover plate is welded and fixed to the main cylinder side panel near the bottom, and the rest is welded and fixed to the secondary cylinder side panel near the bottom.

[0014] In one possible implementation, the outlet pipeline is upwardly connected to a relief pipeline, a relief hole is opened on the upper top plate, two relief holes are provided, and the relief pipeline passes through the relief holes to be connected to the outside of the outer shell box; the outlet pipeline is upwardly connected to a pressure taking pipeline, a pressure taking hole is opened on the upper top plate, two pressure taking holes are provided, and the pressure taking pipeline passes through the pressure taking holes to be connected to the outside of the outer shell box.

[0015] In a possible implementation, the communicating hole extends toward the top of the main cylinder and is provided with a positioning ring.

[0016] The beneficial effects of the present application are as follows: by arranging two pressure regulating pipelines in parallel in the outer casing, and the two pressure regulating pipelines are arranged adjacent to each other, a pressure-bearing connecting pipe is installed at the open end of the main cylinder, and the pressure-bearing connecting pipe is fixedly connected to the outer casing to bear the main weight of the integrated pressure regulating core that needs to be installed, the problem that the middle part of the two main cylinders cannot meet the welding requirements and has poor structural strength can be effectively solved. Furthermore, the pressure regulating pipelines such as the main cylinder are fixed to the outer casing through a pressure-bearing connecting pipe with a matching structure. The weld between the upper top plate and the main cylinder can be only a structural weld to ensure that it can be fixedly connected without being a pressure-bearing weld. The welding requirements are low and it is easy for technical personnel in this field to operate. In addition, compared with directly welding the main cylinder to the upper top plate, the non-pressure-bearing upper top plate can reduce the overall thickness. It only needs to ensure that the cylinder wall of the connecting cylinder has sufficient thickness to ensure structural strength. The upper top plate can greatly reduce the amount of materials used and reduce costs.

[0017] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

[0019] Figure 1 A front cross-sectional view showing the outer box structure of a composite cylindrical dual-circuit underground gas pressure regulating box according to an embodiment of the present application;

[0020] Figure 2 A top view showing the outer box structure of a composite cylindrical dual-circuit underground gas pressure regulating box according to an embodiment of the present application;

[0021] Figure 3 A cross-sectional view showing the outer box structure of a composite cylindrical dual-path underground gas pressure regulating box according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0023] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0025] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0026] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0027] Figure 1 A front cross-sectional view showing the outer box structure of a composite cylindrical dual-circuit underground gas pressure regulating box according to an embodiment of the present application; Figure 2 A top view showing the outer box structure of a composite cylindrical dual-circuit underground gas pressure regulating box according to an embodiment of the present application; Figure 3 A cross-sectional view showing the outer box structure of a composite cylindrical dual-path underground gas pressure regulating box according to an embodiment of the present application.

[0028] like Figure 1-Figure 3As shown, the outer box structure of the composite cylinder type dual-path underground gas pressure regulating box includes an outer shell and a pressure regulating pipeline; the number of the pressure regulating pipelines is two, which are arranged in parallel, and the outer shell covers the two pressure regulating pipelines; the pressure regulating pipeline includes a main cylinder and a secondary cylinder; the upper part of the main cylinder is open, and the interior has a high-pressure chamber 7 located at the top and a partial low-pressure chamber 17 located at the bottom, the main cylinder is connected to the inlet pipeline 6, and a connecting hole is opened between the high-pressure chamber 7 and the partial low-pressure chamber 17; the secondary cylinder It is arranged on one side of the main cylinder, and the interior is the remaining low-pressure chamber 17 connected to the part of the low-pressure chamber 17. It is connected to the part of the low-pressure chamber 17 in the main cylinder through the vent or vent groove opened on the main cylinder, and the low-pressure chamber 17 is connected to the outlet pipeline; a pressure-bearing connecting pipe 9 is provided above each main cylinder, the upper end of the pressure-bearing connecting pipe 9 is sealed with the upper top plate 8 of the outer shell box, and the lower end matches the opening of the main cylinder, and is sealed with the upper side wall of the main cylinder.

[0029] In this embodiment, two pressure regulating pipelines are arranged in parallel in the outer casing, and the two pressure regulating pipelines are arranged adjacent to each other. A pressure-bearing connecting pipe 9 is installed at the open end of the main cylinder, and is fixedly connected to the outer casing through the pressure-bearing connecting pipe 9 to bear the main weight of the integrated pressure regulating core that needs to be installed. This can effectively solve the problem that the middle part of the two main cylinders cannot meet the welding requirements and has poor structural strength.

[0030] Furthermore, the main cylinder and other pressure-regulating pipelines are fixed to the outer casing through a pressure-bearing connecting pipe 9 with a matching structure. The weld between the top plate 8 and the connecting pipe 9 can be a structural weld only, ensuring that it can be fixedly connected without being a pressure-bearing weld. The welding requirements are low and it is easy for technicians in this field to operate. Moreover, compared with directly welding the main cylinder to the top plate 8, the non-pressure-bearing top plate 8 can reduce the overall thickness. It only needs to ensure that the wall of the connecting cylinder has sufficient thickness to ensure structural strength. The top plate 8 can significantly reduce the amount of material used and reduce costs.

[0031] It should be noted that the specific structure of the outer shell box can be a variety of structures, usually in a regular shape, and the outer shell box provided on the outer cover of the pressure regulating pipeline can effectively protect the overall structure of the pressure regulating pipeline from being corroded as little as possible by external soil, etc., reasonably extending the service life of the device itself, and also avoiding direct contact between the pressure-bearing main cylinder, auxiliary cylinder and other components and the external environment, so that the safety of the equipment is sufficiently guaranteed.

[0032] Preferably, the outer shell body is a hollow cube structure, and holes of various sizes are opened on the outer shell body for connecting various pipelines of the pressure regulating pipeline to the outside of the outer shell body.

[0033] More specifically, the vent holes or vent slots are Figure 1The lower right side of the middle main cylinder is located inside the auxiliary cylinder. That is to say, the gas enters the connecting hole through the main cylinder, enters the partial low-pressure chamber in the lower part of the main cylinder, and then passes through the vent or vent groove between the lower right side of the main cylinder and the auxiliary cylinder, enters the auxiliary cylinder vertically attached to one side of the main cylinder, and then enters the outlet pipeline.

[0034] In one embodiment, the axial height of the pressure-bearing connecting pipe 9 is greater than the thickness of the upper plate 8, and the sidewall thickness of the pressure-bearing connecting pipe 9 is greater than the sidewall thickness of the main cylinder. The entire structure is a single component, machined after welding, with high positioning accuracy, eliminating the need for welding with other components and enabling modular mass production.

[0035] In this embodiment, commonly used steel plates and steel pipes are welded together to form a single unit. This significantly reduces the number of welds and the overall welding effort compared to traditional pipe flange and fitting welding methods. The entire unit is a single welded component. Except for a few internal flanges and threaded connections to components such as the integrated pressure regulator and relief valve, all other connections are welded. This significantly reduces potential leak points compared to traditional pipe flange connections.

[0036] In one specific embodiment, two pressure regulating core mounting holes 19 are opened on the upper top plate 8 , and the upper end of the pressure-bearing connecting pipe 9 is welded and fixed to the corresponding pressure regulating core mounting holes 19 on the upper top plate 8 .

[0037] In one specific embodiment, the two main cylinders are attached to or arranged close to each other.

[0038] In this embodiment, the two pressure-regulating pipelines are arranged in parallel, and the main cylinders are attached to or close to each other, which can minimize the footprint of the entire underground gas pressure-regulating device and is also conducive to making the outer shell box smaller. While ensuring that the three-dimensional space inside the outer shell box is fully utilized, the material usage is reduced to save costs.

[0039] It should be noted that an integrated pressure-regulating core is installed in each main cylinder. Whether the two main cylinders are attached or adjacent to each other depends more on the specifications and models of the selected pressure-regulating core. Practitioners in this field can choose according to the appropriate size. It is only necessary to ensure that the two main cylinders that are attached or adjacent to each other will not interfere with each other after the integrated pressure-regulating core is inserted and installed on them, and will not be able to be installed reasonably.

[0040] In one specific embodiment, a pad 29 is further included. A plurality of fixing holes are arranged around the outer ring of the pressure regulating core mounting hole 19. Pads 29 are added at the positions where the fixing holes are opened on the upper top plate 8. The same fixing holes are opened on the pads 29 and do not interfere with the pressure regulating core.

[0041] In this embodiment, compared to other models where the main cylinder and pressure-bearing top plate are directly welded, the fixing holes for mounting the pressure-regulating core are machined into the pressure-bearing top plate, resulting in a thicker pressure-bearing top plate. Using a non-pressure-bearing top plate reduces the overall thickness, requiring only welded thickening plates at the fixing holes. This reduces material usage and therefore costs.

[0042] In one specific embodiment, the thickness of the top plate 8 is between [15 mm, 25 mm]; the thickness of the side wall of the main cylinder is about half the thickness of the pressure-bearing connecting pipe 9, and the two are made of the same material.

[0043] In this embodiment, the pressure-bearing plate is difficult to purchase, and the non-pressure-bearing plate can be made of ordinary steel plates, which are easy to purchase. Therefore, the upper top plate 8 of the outer shell box is made of non-pressure-bearing steel plates, which is also conducive to reasonably reducing the procurement cycle.

[0044] In one specific embodiment, the main cylinder is a hollow cylindrical structure, the auxiliary cylinder is arranged to cover the opposite side of the main cylinder where it is connected to the inlet pipe 6, and the outlet pipe 14 is arranged opposite to the inlet pipe 6.

[0045] like Figure 3 As shown, in one specific embodiment, the auxiliary cylinder is covered and arranged on the opposite side of the main cylinder where it is connected to the inlet pipe 6, and the positions of the outlet pipe and the inlet pipe 6 are arranged relative to each other. The main cylinder includes a main cylinder side panel 4 and a partition plate 1. The main cylinder side panel 4 is a cylindrical plate with a hollow interior, and the bottom is welded and fixed to the bottom of the outer shell box. The air vent or air groove is provided at the bottom of the main cylinder side panel 4 near the outlet pipe side. The partition plate 1 is welded and fixed to the main cylinder side panel 4 near the bottom position, and matches the structure of the main cylinder side panel 4 at this position. The connecting hole is provided at the center of the partition plate 1.

[0046] In one specific embodiment, the side of the secondary cylinder covering the main cylinder includes a secondary cylinder sealing plate 11, a secondary cylinder side panel 12 and a bottom secondary cylinder sealing plate 3 that are sealed with the main cylinder, and the opposite side of the secondary cylinder covering the main cylinder shares a common wall with the main cylinder, wherein one end of the secondary cylinder sealing plate 11 matches the structure of the main cylinder side panel 4 and is welded and fixed to the outside of the main cylinder side panel 4, and the other end of the secondary cylinder sealing plate 11 is welded and fixed to the secondary cylinder side panel 12, and the secondary cylinder side panel 12 is an arc-shaped plate, and the radius of the secondary cylinder side panel 12 is smaller than that of the main cylinder The radius of the side panel 4, the bottom edge of the secondary cylinder side panel 12 is a straight structure or a convex arc structure, and the lower end of the secondary cylinder side panel 12 is welded to the bottom of the outer shell box, the outer edge of the bottom secondary cylinder sealing plate 3 close to the inlet pipe 6 side matches the bottom structure of the main cylinder side panel 4, and the outer edge close to the outlet pipe side matches the bottom structure of the secondary cylinder side panel 12, that is, part of the bottom cylinder sealing plate is welded and fixed to the main cylinder side panel 4 near the bottom position, and the rest is welded and fixed to the secondary cylinder side panel 12 near the bottom position.

[0047] In this embodiment, the structure of the secondary cylinder side panel 12 can be a semi-cylindrical structure buckled on the outside of the main cylinder side panel 4, or it can be a hemispherical structure buckled on the main cylinder side panel 4, and the bottom edge of the secondary cylinder side panel 12 can be a straight structure, that is, the bottom secondary cylinder sealing plate 3 is a straight plate, or the bottom of the secondary cylinder side panel is a convex arc structure, and the bottom secondary cylinder sealing plate 3 is an arc plate that matches the bottom of the secondary cylinder side panel 12.

[0048] In one specific embodiment, the outlet pipe 14 is upwardly connected to a relief pipe, a relief hole is opened on the upper top plate 8, two relief holes are set, and the relief pipe is connected to the outside of the outer shell box through the relief holes. The outlet pipe 14 is upwardly connected to a pressure taking pipe, a pressure taking hole is opened on the upper top plate 8, two pressure taking holes are set, and the pressure taking pipe is connected to the outside of the outer shell box through the pressure taking holes.

[0049] The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box of the present application is welded from steel pipes and steel plates and is equipped with an inlet manifold 23, an inlet valve 22, an inlet pipeline 6, a high-pressure chamber 7, a low-pressure chamber 17, a pressure pipe 24, a bleed pipe 13, an outlet pipe 14, an outlet valve 26, and an outlet manifold 27. The inlet manifold 23 is connected to the inlet valve 22, which is connected to the inlet pipeline 6, the outlet pipeline 14 is connected to the outlet valve 26, and the outlet valve 26 is connected to the outlet manifold 27. The high-pressure chamber 7 provides space for installing the integrated pressure regulating core, and the low-pressure chamber 17 is connected to the pressure pipe and bleed pipe to provide the outlet pressure required by the integrated pressure regulating core and the bleed pipe 13.

[0050] Gas from the network flows into the inlet manifold 23, passes through the inlet valve 22 and inlet pipeline 6, enters the high-pressure chamber 7, and after being filtered and pressure-regulated by the integrated pressure-regulating element, enters the low-pressure chamber 17. It ultimately flows out of the pressure-regulating box through the outlet pipeline 14, outlet valve 26, and outlet manifold 27, with the direction of airflow indicated by the arrow in the figure. The pressure signal required for pressure regulation is provided by the pressure tapping pipe 13, which is connected to the relief valve. If the outlet pressure is too high, the relief valve releases the pressure to protect gas-consuming equipment.

[0051] In one specific embodiment, the communicating hole extends toward the top of the main cylinder and is provided with a positioning ring 2 .

[0052] In this embodiment, the two circuits consist of identical main and auxiliary cylinders, along with associated accessories, allowing for the installation of two identical integrated pressure-regulating cores, achieving a common "one in operation, one in standby" configuration within a single enclosure. A mounting platform extends upward from the connecting hole in the partition plate 1, onto which a fixed positioning ring 2 is welded. Alternatively, the positioning ring 2 can be welded directly to the corresponding position on the partition plate 1 to facilitate positioning of the integrated pressure-regulating core during installation.

[0053] In one specific embodiment, the main cylinder has a connecting pipe 9 welded to one end and a cylinder sealing plate 3 welded to the other. A partition plate 1 is welded inside, and an inlet pipe 6 is welded to the cylinder opening. The secondary cylinder is welded to the other side of the cylinder. A positioning ring 2 is welded to the partition plate 1. The secondary cylinder has a secondary cylinder sealing plate 11 welded to one side, a cylinder sealing plate 3 welded to the other side, and an outlet pipe 14 welded to the cylinder opening.

[0054] The main cylinder side panel 4 and the connecting pipe 9, the partition plate 1, the bottom auxiliary cylinder sealing plate 3, the auxiliary cylinder side panel 12, the auxiliary cylinder sealing plate 11, the inlet pipeline 6, and the outlet pipeline 14 together form a complete pressure regulating pipeline.

[0055] Two identical sets of cylinder assemblies are welded on the upper top plate 8 , two identical sets of pressure-taking outer tubes 28 and discharge tubes 13 are welded between the upper top plate 8 and the outlet pipeline 14 , and a pressure-taking inner tube 29 is welded inside the outlet pipeline 14 .

[0056] It should be pointed out here that the bottom of the main cylinder side panel 4 is welded to the bottom of the outer shell box, and its interior includes a high-pressure chamber located at the upper part and a partial low-pressure chamber located at the lower part, which are separated by a partition plate 1 arranged near the bottom of the main cylinder side panel 4, and ensure that the high-pressure chamber 7 is connected to the low-pressure chamber 17. It can also be said that in the main cylinder side panel 4: the area between the inlet pipeline 6 and the partition plate 1 is the high-pressure chamber 7, which accommodates the main part of the integrated pressure regulating core, the auxiliary cylinder side panel 12, the auxiliary cylinder sealing plate 11 and the bottom auxiliary cylinder sealing plate 3 together with the main cylinder side panel 4 common wall part constitute the low-pressure chamber 17, and the area between the partition plate 1 and the outlet pipeline 14 is the low-pressure chamber 17. It can also be said: the lower chamber of the main cylinder and all the chambers of the auxiliary cylinder together constitute the entire low-pressure chamber 17.

[0057] An instrument box mounting hole 18 is processed on the upper top plate 8 to install the instrument box, an integrated pressure regulating core mounting hole 19 is processed to install the integrated pressure regulating core, and an upper sealing surface 10 is processed to achieve sealing between the upper top plate 8 and the integrated pressure regulating core by installing a rubber sealing ring.

[0058] The lower sealing surface 20 is processed in the inner area of ​​the positioning ring 2 on the partition plate 1, and the sealing between the integrated pressure regulating core and the partition plate 1 can be achieved by installing a rubber sealing gasket.

[0059] A tool mounting hole 21 is processed on the positioning ring 2, and a pressure test tool can be installed to close the outlet hole on the partition plate 1. The corresponding pressure test tool can be installed on the integrated pressure regulating core mounting hole 19. After the inlet and outlet valves are welded to the inlet pipeline 6 and the outlet pipeline 14, the high-pressure chamber 7 and the low-pressure chamber 17 can be subjected to pressure strength tests respectively.

[0060] One end of the pressure-taking outer tube 28 is connected to the pressure-taking inner tube 29, and the other end is processed with a pressure-taking hole 29. The pressure-taking hole 29 is installed with a pressure-taking component, which can accurately transmit the steady flow pressure formed by the long straight pipe section in the outlet pipeline 14 to the integrated pressure regulating core.

[0061] One end of the relief pipe 13 is connected to the low-pressure chamber 17, and the other end is processed with a relief hole 25. When the outlet pressure of the pressure regulating device is too high, the pressure can be released through the relief pipe 13 and then through the relief valve to protect the safe operation of the equipment.

[0062] The inlet outer frame plate 5 and the outlet outer frame plate 15 are welded around the upper top plate 8, and the inlet pipeline 6 and the outlet pipeline 14 pass through them respectively. The lower bottom plate 16 is welded below the inlet outer frame plate 5 and the outlet outer frame plate 15. The two frame plates and the bottom plate enclose the pressure cylinder assembly and the pipeline. When buried, the pressure cylinder and the pipeline are not in contact with the soil, which reduces corrosion and is suitable for buried installation. The inlet outer frame plate 5 and the outlet outer frame plate 15 are both made of thick steel plates. In addition to protecting the internal pressure cylinder pipeline, they can also support the whole. They can effectively bear the compression of the surrounding soil and the load caused by the trampling of pedestrians and vehicles above. At the same time, they reduce the tension of the pipeline network's own weight on the welds between the inlet and outlet pipes and the cylinder assembly, ensuring the safe operation of the equipment.

[0063] Inlet valve 22 is welded to the outside of inlet pipe 6, which is then welded to inlet manifold 23. Outlet valve 26 is welded to the outside of outlet pipe 14, which is then welded to outlet manifold 27. Each inlet and outlet manifold 23 has a connection to the pipe network. The manifolds and valves are welded in-house, reducing on-site welding workload.

[0064] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. An outer box structure of a composite cylindrical dual-circuit underground gas pressure regulating box, characterized in that: Including outer casing and pressure regulating pipeline; There are two pressure regulating pipelines, which are arranged in parallel, and the outer casing covers the two pressure regulating pipelines; The pressure regulating pipeline includes a main cylinder and a secondary cylinder; The upper portion of the main cylinder is open, and has a high-pressure chamber located at the upper portion and a portion of a low-pressure chamber located at the lower portion. The main cylinder is connected to the inlet pipeline, and a communication hole is opened between the high-pressure chamber and a portion of the low-pressure chamber. The secondary cylinder is arranged on one side of the main cylinder, and contains the remaining portion of the low-pressure chamber that is connected to a portion of the low-pressure chamber. The secondary cylinder is connected to a portion of the low-pressure chamber in the main cylinder through a vent or vent groove provided on the main cylinder, and the low-pressure chamber is connected to an outlet pipe. A pressure-bearing connecting pipe is provided above each main cylinder, the upper end of which is sealedly connected to the upper top plate of the outer casing, and the lower end of which matches the opening of the main cylinder and is sealedly connected to the upper side wall of the main cylinder; The axial height of the pressure-bearing connecting pipe is greater than the thickness of the upper top plate; The side wall thickness of the pressure-bearing connecting pipe is greater than the side wall thickness of the main cylinder; The upper top plate is provided with two pressure regulating core mounting holes, and the upper end of the pressure-bearing connecting pipe is welded and fixed to the corresponding positions of the pressure regulating core mounting holes on the upper top plate.

2. The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box according to claim 1 is characterized in that: The two main cylinders are attached to each other or arranged close to each other.

3. The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box according to claim 1 is characterized in that: Also includes backing plates; A plurality of fixing holes are arranged around the outer side of the mounting hole of the pressure regulating core, and the pads are added at the positions where the fixing holes are opened on the top plate; The same fixing holes are provided on the backing plate and do not interfere with the voltage regulating core.

4. The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box according to claim 1 is characterized in that: The thickness of the top plate is between [15mm, 25mm]; The thickness of the side wall of the main cylinder is half of the wall thickness of the pressure-bearing connecting pipe, and the two are made of the same material.

5. The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box according to any one of claims 1 to 3, characterized in that: The auxiliary cylinder is arranged to cover the opposite side of the main cylinder where it is connected to the inlet pipeline, and the outlet pipeline is arranged opposite to the inlet pipeline; The main cylinder includes a main cylinder side panel and a partition plate; The side panel of the main cylinder is a hollow cylindrical plate, the bottom of which is welded and fixed to the bottom of the outer casing, and the vent or the vent groove is provided at the bottom of the side panel of the main cylinder near the outlet pipe. The partition plate is welded and fixed to the main cylinder side panel near the bottom position, and matches the position structure of the main cylinder side panel. The connecting hole is opened at the center of the partition plate.

6. The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box according to claim 5 is characterized in that: The side of the secondary cylinder covering the main cylinder includes a secondary cylinder sealing plate, a secondary cylinder side panel and a bottom secondary cylinder sealing plate that are sealed with the main cylinder, and the opposite side of the secondary cylinder covering the main cylinder shares a common wall with the main cylinder; Wherein, one end of the secondary cylinder cover plate matches the structure of the main cylinder side panel and is welded and fixed to the outside of the main cylinder side panel, and the other end of the secondary cylinder cover plate is welded and fixed to the secondary cylinder side panel; The secondary cylinder side panels are arc-shaped panels, the radius of which is smaller than that of the main cylinder side panels, the bottom edge of which is a straight structure or a convex arc structure, and the lowermost end of which is welded to the bottom of the outer casing; The outer edge of the bottom secondary cylinder sealing plate close to the inlet pipeline side matches the bottom structure of the main cylinder side panel, and the outer edge close to the outlet pipeline side matches the bottom structure of the secondary cylinder side panel, that is, part of the bottom secondary cylinder sealing plate is welded and fixed to the main cylinder side panel near the bottom position, and the remaining part is welded and fixed to the secondary cylinder side panel near the bottom position.

7. The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box according to any one of claims 1 to 3, characterized in that: The outlet pipe is upwardly connected to a vent pipe, and a vent hole is provided on the top plate, two vent holes are provided, and the vent pipe passes through the vent holes and is connected to the outside of the outer casing; The outlet pipeline is upwardly connected to a pressure-taking pipeline. A pressure-taking hole is provided on the upper top plate. Two pressure-taking holes are provided. The pressure-taking pipeline passes through the pressure-taking holes and is connected to the outside of the outer casing.

8. The outer box structure of the composite cylindrical dual-circuit underground gas pressure regulating box according to claim 5 is characterized in that: The communicating hole extends toward the top of the main cylinder and is provided with a positioning ring.

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