A buried gas underground pressure regulating station

Abstract

The present invention relates to a buried gas underground pressure regulating station, wherein the inlet module comprises an inlet buried valve, and the outlet module comprises an outlet buried valve; the filter module comprises a buried filter with a separate cylinder, a filter module box is arranged on the top of the buried filter, the sewage outlet of the buried filter extends upward into the filter module box through a pipeline, and a sewage valve is arranged on the top of the pipeline; the sewage valve and the differential pressure gauge and pressure gauge of the buried filter are arranged in the filter module box; the cut-off module comprises a buried cut-off valve, and the upper part of the cut-off valve is arranged in the cut-off module box; the pressure regulating module comprises a pressure regulator, and the pressure regulator and the pressure gauge are arranged in the pressure regulating module box; the filter module box, the cut-off module box, and the pressure regulating module box are partially exposed to the ground, and a detachable sealing upper cover is arranged on the top. The present invention realizes the direct underground use of the gas pressure regulating station, reduces the noise of equipment operation and the difficulty of layout, and facilitates maintenance and replacement of components.

Description

Technical Field

[0001] The invention relates to an underground gas pressure regulating station, belonging to the technical field of underground pressure regulating stations. Background Art

[0002] With the continuous development of urban construction, the density of buildings and population continues to increase, and the contradiction between urban planning and gas pressure regulating facilities becomes increasingly prominent. The emergence of underground gas pressure regulating stations solves the problems of land occupation and noise of gas pressure regulating facilities, and becomes an innovative layout method of gas pressure regulating facilities.

[0003] The Chinese patent documents with publication date of January 22, 2019 and publication number CN109253395A, and publication date of July 6, 2018 and publication number CN108253293A, both place the shut-off valve and the filter in the same cylinder, and the gas is first filtered through the filter and then flows through the shut-off valve, and then reaches the low-pressure cylinder for pressure reduction.

[0004] Although this design can reduce the volume of the equipment, it does not consider the problem of sewage discharge from the filter cartridge. In addition, the filter is an object that needs to be replaced. Each time the filter is replaced, the shut-off valve above the filter cartridge must be removed, which is cumbersome to operate and difficult to inspect. In addition, CN108253293A and CN110260158A also use a lower box to wrap the valve body, which avoids corrosion of the valve body but increases the cost of product investment. Summary of the invention

[0005] The purpose of the present invention is to provide an underground gas pressure regulating station. On the premise of meeting the requirements of waterproofing and anti-corrosion, the pressure regulating valve and the filter are designed to be directly buried, so as to reduce the cost of the pressure regulating station and avoid the possibility of explosion of the bottom box; the filter module box, the cut-off module box, the pressure regulating module box, the station instruments, the valve operation and maintenance, and the filter element replacement are designed to be more convenient, and the cost of the pressure regulating station is also reduced; in addition, the sewage pipe is introduced from the bottom of the buried filter upward into the filter module box, and the sewage is directly discharged by air pressure, which greatly improves the convenience of sewage discharge.

[0006] The present invention adopts the following technical solutions:

[0007] A buried gas underground pressure regulating station, comprising an inlet module, a filter module, a cut-off module, a pressure regulating module, an outlet module, and a venting module connected in sequence; the first five modules are connected by welding; the inlet module comprises an inlet buried valve 1, and the outlet module comprises an outlet buried valve 10; the filter module comprises an underground filter 2 with a separate cylinder, a filter module box 12 is arranged on the top of the buried filter 2, and a sewage outlet of the buried filter 2 extends upward to the filter module box 12 through a pipeline, and a sewage valve 3 is arranged on the top of the pipeline; the differential pressure of the sewage valve 3 and the buried filter 2 The gauge 5 and the pressure gauge 4 are both arranged in the filter module case 12; the cut-off module includes an underground cut-off valve 6, and the upper part of the cut-off valve 6 is arranged in the cut-off module case 13; the pressure regulating module includes a pressure regulator 7, and the pressure regulator 7 and the pressure gauge 8 are arranged in the pressure regulating module case 14; the vent module includes a vent valve 9 and a vent pipe 11, and the vent valve 9 is arranged in the pressure regulating module case 14, and the vent pipe 11 extends upward from the ground; the filter module case 12, the cut-off module case 13, and the pressure regulating module case 14 are partially exposed to the ground, and a detachable sealing upper cover 17 is provided on the top.

[0008] Preferably, the exteriors of the buried filter 2, the filter module housing 12, the cut-off module housing 13, and the voltage regulating module housing 14 are entirely coated with a waterproof and anti-corrosion coating.

[0009] Preferably, the cut-off module adopts a cut-off valve 6 with a separate valve body, the head of the cut-off valve 6 is placed in the cut-off module box 13, and there is also a pressure-leading pipe in the cut-off module box 13; the valve body part of the cut-off valve 6 is made of pipe fittings of the same material as the pipeline, and is coated with the same waterproof and anti-corrosion coating as the pipeline.

[0010] Preferably, the pressure regulating module has a top-entry pressure regulator 7 with a separate valve body, and the head of the pressure regulator 7 is in the pressure regulating module box 14; the pressure regulating module box 14 also has a pressure lead pipe, a pressure gauge 8, a threaded ball valve and a relief valve 9.

[0011] Preferably, a rainproof cap is provided on the top of the emission pipe 11 of the emission module, and the emission pipe 11 is located on the ground and vertically upward.

[0012] The beneficial effects of the present invention are:

[0013] 1) The purpose of directly burying the gas pressure regulating station is achieved, the noise of equipment operation and the difficulty of layout are reduced, the floor space is saved, and the impact on the surrounding environment is greatly reduced.

[0014] 2) Adopt modular design, select top-entry components, protect the filter head, cut-off valve head, and regulator head with three waterproof anti-corrosion boxes, and arrange all operating valves and instruments in the corresponding waterproof anti-corrosion boxes to form three independent modules. Each module can be read and operated separately, which is convenient for maintenance and replacement of components. The entire station can also be taken out as a whole to realize the overall overhaul and maintenance function.

[0015] 3) Personnel do not need to enter the enclosed space underground. They can maintain the buried equipment on the ground, which reduces the safety risk of suffocation caused by gas leakage in the enclosed area, maximizes the requirements for safe gas operation for personnel, and ensures inherent safety while achieving the purpose of burying the equipment.

[0016] 4) Due to the direct burial method, there is no need to bury the box, thus avoiding the possibility of explosion of the bottom box.

[0017] 5) By designing the filter module box, cut-off module box, and pressure regulating module box with the upper end exposed above the ground, the operation and maintenance of the instruments and valves in the station and the replacement of the filter element are more convenient, and the cost of the pressure regulating station is also reduced;

[0018] 6) The sewage pipe is introduced from the bottom of the buried filter upward into the filter module box, and the sewage is directly discharged using air pressure, which greatly improves the convenience of sewage discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a system structure diagram of the buried gas underground pressure regulating station of the present invention.

[0020] In the figure, 1-inlet buried valve; 2-buried filter; 3-drain valve; 4-pressure gauge; 5-differential pressure gauge; 6-cut-off valve; 7-pressure regulator; 8-pressure gauge; 9-relief valve; 10-outlet buried valve; 11-relief pipe; 12-filter module housing; 13-cut-off module housing; 14-pressure regulating module housing; 15-inlet pipe; 16-outlet pipe; 17-sealed upper cover. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] See also Figure 1A buried gas underground pressure regulating station, comprising an inlet module, a filter module, a cut-off module, a pressure regulating module, an outlet module, and a venting module connected in sequence; the first five modules are connected by welding; the inlet module comprises an inlet buried valve 1, and the outlet module comprises an outlet buried valve 10; the filter module comprises an underground filter 2 with a separate cylinder, a filter module box 12 is arranged on the top of the buried filter 2, and a sewage outlet of the buried filter 2 extends upward to the filter module box 12 through a pipeline, and a sewage valve 3 is arranged on the top of the pipeline; the difference between the sewage valve 3 and the buried filter 2 The pressure gauge 5 and the pressure gauge 4 are both arranged in the filter module box 12; the cut-off module includes an underground cut-off valve 6, and the upper part of the cut-off valve 6 is arranged in the cut-off module box 13; the pressure regulating module includes a pressure regulator 7, and the pressure regulator 7 and the pressure gauge 8 are arranged in the pressure regulating module box 14; the relief module includes a relief valve 9 and a relief pipe 11, and the relief valve 9 is arranged in the pressure regulating module box 14, and the relief pipe 11 extends upward from the ground; the filter module box 12, the cut-off module box 13, and the pressure regulating module box 14 are partially exposed to the ground, and a detachable sealing upper cover 17 is provided on the top.

[0023] In this embodiment, the exteriors of the buried filter 2, the filter module housing 12, the cut-off module housing 13, and the voltage regulating module housing 14 are coated with a waterproof and anti-corrosion coating.

[0024] In this embodiment, the cut-off module uses a cut-off valve 6 with a separate valve body, the head of the cut-off valve 6 is placed in the cut-off module box 13, and there is also a pressure-leading pipe in the cut-off module box 13; the valve body of the cut-off valve 6 is made of pipe fittings of the same material as the pipeline, and is coated with the same waterproof and anti-corrosion coating as the pipeline.

[0025] In this embodiment, the pressure regulating module has a top-entry type pressure regulator 7 with a separate valve body, and the head of the pressure regulator 7 is in the pressure regulating module box 14; the pressure regulating module box 14 also has a pressure lead pipe, a pressure gauge 8, a threaded ball valve and a relief valve 9.

[0026] In this embodiment, a rainproof cap is provided on the top of the emission pipe 11 of the emission module, and the emission pipe 11 is located on the ground and vertically upward.

[0027] When in use, the gas enters the pressure regulating station from the inlet pipe, and flows out from the outlet pipe after the pressure regulation is completed. The pipelines of the pressure regulating station and each operation box are coated with waterproof and anti-corrosion materials to ensure the overall waterproof and anti-corrosion performance of the pressure regulating station.

[0028] It should be noted that if Figure 1As shown, the bottom of the buried filter 2 extends upward through a pipe and is provided with a drain valve 3. Although the pipe is from bottom to top, the gas pressure is sufficient to blow out impurities in the solid-liquid mixture such as condensed water and iron oxide particles upward, which can be operated by opening and closing the drain valve 3. In extreme cases, when the sewage pipe is blocked, the sealed upper cover 17 can be opened and a spiral unblocking device can be used to perform the unblocking operation.

[0029] The specific description of the structure is as follows:

[0030] The filter module box 12 is located on the upper part of the buried filter 2, which improves the waterproof and anti-corrosion performance of the upper part of the filter (especially the operation area and the blind plate part). A sealed upper cover 17 is installed on the top of the filter module box 12, and the upper cover and the box body jointly achieve the function of sealing, waterproofing and anti-corrosion. In addition, the filter module box 12 also includes a drain valve 3; a pressure gauge 4; and a differential pressure gauge 5. The drain valve 3 is used when the buried filter is drained, and the pressure gauge 4 is used to measure the pressure entering the pressure regulating station. The differential pressure gauge 5 is used to read the pressure difference at both ends of the filter. If the pressure difference is too large, it means that the filter element needs to be replaced. In this embodiment, the drain valve 3; the pressure gauge 4; the differential pressure gauge 5 are arranged on the upper part of the filter module 12 box, and all the instrument panels are installed upward, so that the operator can directly observe the instrument degree by opening the sealed upper cover 17; at the same time, the operating components are arranged on the upper part of the box, so that the operator can directly operate by opening the 17-sealed upper cover when the operation is required.

[0031] The cut-off module box 13 is located on the top of the cut-off valve 6 to improve the waterproof and anti-corrosion performance of the top of the cut-off valve. A sealing upper cover 17 is installed on the top of the cut-off module box 13, and the upper cover and the box together achieve the function of sealing, waterproofing and anti-corrosion.

[0032] The pressure regulating module box 14 is located on the upper part of the pressure regulator 7 to improve the waterproof and anti-corrosion performance of the upper part of the cut-off valve. A sealed upper cover 17 is installed on the top of the pressure regulating module box 14, and the upper cover and the box body together achieve the function of sealing, waterproofing and anti-corrosion. In addition, the pressure regulating module box 14 also includes a pressure gauge 8 and a relief valve 9. The function of the pressure gauge 8 is to read the outlet pressure of the pressure regulator, and the function of the relief valve 9 is to prevent the cut-off valve 6 from being accidentally cut off due to normal pressure fluctuations. The outlet end of the relief valve is connected to the relief pipe 11 through a pipeline.

[0033] The working process of this embodiment is as follows: the gas from the medium-pressure pipe network enters the underground pressure regulating station from the inlet pipe, passes through the inlet buried valve, and then enters the buried filter 2. After the filtration is completed, it flows through the cut-off valve 6 to the pressure regulator 7, and after the pressure regulation is completed by the pressure regulator 7, it enters the low-pressure pipe network. When the outlet pressure exceeds the set pressure of the relief valve 9, the relief valve automatically releases, and the gas enters the relief pipe through the pipeline and escapes into the atmosphere. When the outlet pressure of the pressure regulator 7 exceeds the set pressure of the cut-off valve 6, the cut-off valve is closed, closing the pressure regulator passage.

[0034] This buried gas underground pressure regulating station can have various specifications and models. In actual use, multiple units can be combined in parallel to achieve large flow and common functions of pressure regulating stations. It is very flexible and convenient. When a single unit fails and needs maintenance, it is only necessary to close the inlet and outlet buried valves of this unit without affecting the overall ventilation.

[0035] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A buried gas underground pressure regulating station, characterized in that: It includes an inlet module, a filter module, a cut-off module, a pressure regulating module, an outlet module, and a venting module which are connected in sequence; the first five modules are connected by welding; The inlet module comprises an inlet buried valve (1), and the outlet module comprises an outlet buried valve (10); The filter module comprises an underground filter (2) having a separate cylinder, a filter module box (12) being arranged on the top of the underground filter (2), a sewage outlet of the underground filter (2) extending upwards into the filter module box (12) through a pipeline, a sewage outlet (3) being arranged on the top of the pipeline; the sewage outlet (3) and a differential pressure gauge (5) and a pressure gauge (4) of the underground filter (2) are all arranged in the filter module box (12); The cut-off module comprises a buried cut-off valve (6), the upper portion of the cut-off valve (6) being arranged in a cut-off module casing (13); The pressure regulating module comprises a pressure regulator (7), wherein the pressure regulator (7) and another pressure gauge (8) are arranged in a pressure regulating module box (14); The relief module comprises a relief valve (9) and a relief pipe (11), wherein the relief valve (9) is arranged in the pressure regulating module housing (14), an outlet end of the relief valve is connected to the relief pipe (11) through a pipeline, and the relief pipe (11) extends upwards to the ground; The filter module housing (12), the cut-off module housing (13), and the pressure regulating module housing (14) are partially exposed above the ground, and are all provided with a detachable sealing upper cover (17) at the top; The exteriors of the buried filter (2), the filter module housing (12), the cut-off module housing (13), and the voltage regulating module housing (14) are all coated with a waterproof and anti-corrosion coating; The cut-off module uses a cut-off valve (6) with a separate valve body. The head of the cut-off valve (6) is placed in a cut-off module housing (13). A pressure-conducting pipe is also provided in the cut-off module housing (13). The valve body of the cut-off valve (6) is made of a pipe fitting made of the same material as the pipeline and is coated with a waterproof and anti-corrosion coating as the pipeline.

2. The buried gas underground pressure regulating station according to claim 1, characterized in that: The pressure regulating module comprises a pressure regulator (7) with a separate valve body of top entry type, the head of the pressure regulator (7) being inside a pressure regulating module housing (14); the pressure regulating module housing (14) also comprises a pressure lead pipe, another pressure gauge (8), a threaded ball valve and a relief valve (9).

3. The buried gas underground pressure regulating station according to claim 1, characterized in that: A rainproof cap is provided on the top of the discharge pipe (11) of the discharge module, and the discharge pipe (11) is located on the ground and is vertically upward.

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