Pressure stabilizing device for upstream and downstream of natural gas PE valve

Abstract

The utility model relates to the field of pressure stabilizing devices, and discloses a pressure stabilizing device for upstream and downstream of a natural gas PE (Poly Ethylene) valve, which is arranged on the PE valve, a gas inlet pipe is arranged at the left end of the PE valve, a gas outlet pipe is arranged at the right end of the PE valve, and a plurality of groups of relief valves are arranged at the rear end of the PE valve. The other group of blow-off valves are arranged at the position, close to the right end, of the rear end of the PE valve, a pressure stabilizing assembly is arranged at the rear end of each blow-off valve, an adjusting assembly is arranged at the rear end of the other group of blow-off valves, each pressure stabilizing assembly comprises a connecting pipe, the front end of each connecting pipe is installed at the rear end of the corresponding blow-off valve, and a first three-way pipe is installed at the right end of each connecting pipe. In the utility model, the connecting pipe and the three-way pipe II are used for connecting the two groups of relief valves, then the exhaust valve is closed, the upstream and downstream air pressure of the PE valve is stable under the action of the bypass valve, and when the reading of the upper pressure gauge and the reading of the lower pressure gauge are observed to be the same, the upstream and downstream air pressure of the device is balanced.

Description

Technical Field

[0001] The utility model relates to the field of voltage stabilizing devices, in particular to a voltage stabilizing device for the upstream and downstream of a natural gas PE valve. Background Art

[0002] A PE valve is a control component in a fluid transportation system, with functions such as cut-off, regulation, diversion, prevention of backflow, voltage stabilization, flow splitting, or overflow pressure relief. This kind of valve is usually used in a gas supply system and is a plastic valve, with the main material being polyethylene.

[0003] Since after the connection or repair of the medium-pressure natural gas pipeline, there is pressure in the upstream pipeline of the PE valve, and there is no pressure in the downstream pipeline after venting, a pressure difference will be generated between the upstream and downstream, making it difficult to open the valve. Therefore, a voltage stabilizing device for the upstream and downstream of a natural gas PE valve is proposed to solve the above problems. Content of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides a voltage stabilizing device for the upstream and downstream of a natural gas PE valve, aiming to improve the problem in the prior art that "a pressure difference will be generated between the upstream and downstream after the repair of the natural gas pipeline, which will cause it difficult to open the intermediate PE valve".

[0005] To achieve the above object, the utility model adopts the following technical scheme: A voltage stabilizing device for the upstream and downstream of a natural gas PE valve is provided on the PE valve. An inlet pipe is installed at the left end of the PE valve, an outlet pipe is installed at the right end of the PE valve, a vent valve is installed at the rear end of the PE valve, multiple groups of vent valves are provided, and another group of vent valves is arranged at a position near the right end at the rear end of the PE valve. A voltage stabilizing component is arranged at the rear end of the vent valve, and an adjusting component is arranged at the rear end of the other group of vent valves.

[0006] As a further description of the above technical scheme:

[0007] The voltage stabilizing component includes a connecting pipe, the front end of the connecting pipe is installed at the rear end of the vent valve, a three-way pipe one is installed at the right end of the connecting pipe, and a bypass valve is installed at the right end of the three-way pipe one.

[0008] As a further description of the above technical scheme:

[0009] A control valve one is installed at the rear end of the three-way pipe one, and an upper pressure gauge is installed at the rear end of the control valve one.

[0010] As a further description of the above technical scheme:

[0011] The adjusting component includes a three-way pipe III, the front end of the three-way pipe III is installed at the rear end of the other group of the blow-off valves, the left end of the three-way pipe III is installed with a three-way pipe II, and the left end of the three-way pipe II is connected to the right end of the bypass valve.

[0012] As a further description of the above technical solution:

[0013] An exhaust valve is installed at the rear end of the three-way pipe II.

[0014] As a further description of the above technical solution:

[0015] A control valve II is installed at the rear end of the three-way pipe III, and a lower pressure gauge is installed at the rear end of the control valve II.

[0016] The utility model has the following beneficial effects:

[0017] 1. In the utility model, by using the connecting pipe and the three-way pipe II to connect two groups of blow-off valves, and then closing the exhaust valve, at this time, the air pressures upstream and downstream of the PE valve will be stable under the action of the bypass valve. When it is observed that the readings of the upper pressure gauge and the lower pressure gauge are the same, it means that the air pressures upstream and downstream of the device are balanced. At this time, the PE valve can be easily opened.

[0018] 2. In the utility model, by connecting the blow-off valve at the rear end of the air outlet pipe to the three-way pipe III, and then opening the exhaust valve, at this time, the redundant gas inside the device will be discharged through the exhaust valve, so that the blow-off operation of the pipeline can be realized. Description of the Drawings

[0019] Figure 1 is a three-dimensional structural schematic diagram of the overall device in the utility model;

[0020] Figure 2 is a three-dimensional structural schematic diagram of the blow-off component in the utility model;

[0021] Figure 3 is a three-dimensional structural schematic diagram of the adjusting component in the utility model.

[0022] Legend Explanation:

[0023] 1. PE valve; 2. Inlet pipe; 3. Outlet pipe; 4. Blow-off valve; 5. Voltage stabilizing component; 51. Connecting pipe; 52. Control valve I; 53. Bypass valve; 54. Upper pressure gauge; 55. Three-way pipe I; 6. Adjusting component; 61. Three-way pipe II; 62. Three-way pipe III; 63. Exhaust valve; 64. Lower pressure gauge; 65. Control valve II. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Referring to Figure 1 - Figure 3 , an embodiment provided by the present utility model: A pressure stabilizing device for the upstream and downstream of a natural gas PE valve, including a PE valve 1 for transporting gas. An intake pipe 2 for connecting to the upstream pipeline is installed at the left end of the PE valve 1, and an outlet pipe 3 for connecting to the downstream pipeline is installed at the right end of the PE valve 1. A relief valve 4 for conveniently adjusting the upstream and downstream air pressures is installed at the rear end of the PE valve 1. There are multiple groups of relief valves 4, and another group of relief valves 4 is arranged at a position near the right end of the rear end of the PE valve 1. A pressure stabilizing component 5 for conveniently balancing the upstream and downstream air pressures of the device is arranged at the rear end of the relief valve 4, and an adjusting component 6 for discharging gas from the upstream or downstream of the device is arranged at the rear end of the other group of relief valves 4.

[0026] Referring to Figure 1 - Figure 3 , the pressure stabilizing component 5 includes a connecting pipe 51 for connecting the pressure stabilizing component 5 and the relief valve 4. The connecting pipe 51 is a corrugated hose, which can be conveniently connected to pipelines at different positions. The front end of the connecting pipe 51 is installed at the rear end of the relief valve 4, and a tee pipe 55 for transmitting gas into the bypass valve 53 is installed at the right end of the connecting pipe 51. A bypass valve 53 for balancing the upstream and downstream air pressures is installed at the right end of the tee pipe 55. A control valve 52 for controlling the upper pressure gauge 54 is installed at the rear end of the tee pipe 55, and an upper pressure gauge 54 for measuring the upstream air pressure is installed at the rear end of the control valve 52.

[0027] Referring to Figure 1 - Figure 3 , the adjusting component 6 includes a tee pipe 62 for connecting the adjusting component 6 and the other group of relief valves 4. The front end of the tee pipe 62 is installed at the rear end of the other group of relief valves 4. A tee pipe 61 for connecting the bypass valve 53 and the tee pipe 62 is installed at the left end of the tee pipe 62. The left end of the tee pipe 61 is connected to the right end of the bypass valve 53. An exhaust valve 63 for discharging the excess gas inside the device pipeline is installed at the rear end of the tee pipe 61. A control valve 65 for controlling the lower pressure gauge 64 is installed at the rear end of the tee pipe 62, and a lower pressure gauge 64 for measuring the downstream air pressure is installed at the rear end of the control valve 65.

[0028] Working principle: When the PE valve 1 is difficult to open due to unequal air pressures upstream and downstream, the connecting pipe 51 can be used to connect the relief valve 4 first, and then the tee 62 can be used to connect another set of relief valves 4. Subsequently, the two sets of relief valves 4, the control valve 52, and the control valve 65 can be opened. At this time, the gas will be exchanged inside the bypass valve 53. When it is observed that the readings of the lower pressure gauge 64 and the upper pressure gauge 54 are the same, it means that the air pressures upstream and downstream are already the same. Subsequently, the two sets of relief valves 4 can be closed and the pressure stabilizing component 5 and the regulating component 6 can be removed. Then, the PE valve 1 can be opened to transport the gas.

[0029] When bleeding is required, the outlet pipe 3 and the relief valve 4 need to be connected to the tee 62. Subsequently, the PE valve 1 can be closed and the exhaust valve 63 can be opened. At this time, the excess gas inside the device will be discharged along the exhaust valve 63, and thus bleeding inside the pipeline can be achieved. After bleeding is completed, the relief valve 4 can be closed and the regulating component 6 can be removed.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pressure stabilizing device upstream and downstream of a natural gas PE valve, arranged on the PE valve (1), characterized in that: An air inlet pipe (2) is installed at the left end of the PE valve (1), an air outlet pipe (3) is installed at the right end of the PE valve (1), a relief valve (4) is installed at the rear end of the PE valve (1), and multiple groups of relief valves (4) are provided, another group of relief valves (4) is provided at the rear end of the PE valve (1) near the right end, a pressure stabilizing component (5) is provided at the rear end of the relief valve (4), and another group of relief valves (4) is provided at the rear end of the PE valve (1).

2. The pressure stabilizing device for upstream and downstream of a natural gas PE valve according to claim 1 is characterized in that: The pressure stabilizing assembly (5) comprises a connecting pipe (51), the front end of the connecting pipe (51) is mounted on the rear end of the relief valve (4), a three-way pipe (55) is mounted on the right end of the connecting pipe (51), and a bypass valve (53) is mounted on the right end of the three-way pipe (55).

3. The pressure stabilizing device for upstream and downstream of the natural gas PE valve according to claim 2 is characterized by: A control valve (52) is installed at the rear end of the three-way pipe (55), and an upper pressure gauge (54) is installed at the rear end of the control valve (52).

4. The pressure stabilizing device for upstream and downstream of a natural gas PE valve according to claim 1 is characterized in that: The regulating assembly (6) comprises a three-way pipe (62), the front end of which is mounted on the rear end of another set of relief valves (4), a two-way pipe (61) is mounted on the left end of the three-way pipe (62), and the left end of the two-way pipe (61) is connected to the right end of the bypass valve (53).

5. The pressure stabilizing device for upstream and downstream of a natural gas PE valve according to claim 4 is characterized in that: An exhaust valve (63) is installed at the rear end of the second three-way pipe (61).

6. The pressure stabilizing device for upstream and downstream of a natural gas PE valve according to claim 4 is characterized in that: A control valve 2 (65) is installed at the rear end of the three-way pipe 3 (62), and a lower pressure gauge (64) is installed at the rear end of the control valve 2 (65).

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