Gas pipeline under-pressure drainage device

Abstract

The utility model discloses an under-pressure drainage device for a gas pipeline. The under-pressure drainage device aims to solve the problems that an existing drainage device for the gas pipeline is troublesome in operation and limited in application. The drainage device is installed on a blow-off valve above a valve to be drained, accumulated water in the valve can be drained, the drainage device comprises a blow-off valve connecting base, a drainage ball valve and a drainage hose which are sequentially connected, a water pumping pipe is arranged in a channel in the blow-off valve connecting base, and the lower portion of the water pumping pipe is inserted into the blow-off valve and stretches into the accumulated water position at the bottom of the valve to be drained; the device is easy to operate, convenient to disassemble and carry and wide in application, accumulated water in the pipeline is discharged through the gas pressure and atmospheric pressure difference in the gas pipeline, fire operation is avoided, and safety is high.

Description

Technical Field

[0001] The present application relates to the technical field of gas equipment, and in particular to a pressure drainage device for a gas pipeline. Background Art

[0002] In the process of urban gas transmission and distribution, although the gas has been filtered and dried before leaving the station, there is still a certain amount of water accumulated in the gas valve. Currently, there is no device for draining the gas pipeline through the gas valve.

[0003] Chinese patent document CN212156239U discloses a medium-pressure gas pipeline drainage device, which includes a flange connection part and a drainage pipe part. The flange connection part is connected to the inlet flange of the pressure regulating box. The drainage pipe part can be connected to a hose according to actual conditions and probed down to the water accumulation in the pipeline. Two ball valves are installed on the drainage outlet pipe to drain the water from the pipeline by utilizing the pressure difference between the medium-pressure gas pipeline and the atmospheric pressure. In this patent, the medium-pressure gas pipeline drainage device utilizes the pipeline pressure to drain water and is connected to the inlet of the pressure regulating box by means of a flange. However, this method is cumbersome to operate and needs to be operated at the pressure regulating box, which has the problems of limited application and inconvenient operation. Utility Model Content

[0004] To this end, the present application provides a gas pipeline pressure drainage device to solve the problems of the existing gas pipeline drainage devices having trouble in operation and limited application.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A gas pipeline pressure drainage device, the drainage device is installed on a relief valve above a valve to be drained, and the relief valve and the valve to be drained are connected through a relief pipe;

[0007] The drainage device includes a relief valve connection seat, a discharge ball valve and a drainage hose which are connected in sequence. The relief valve connection seat is installed on the relief valve, and a channel connected to the discharge ball valve is provided inside the relief valve connection seat. A pumping pipe is provided in the channel. The upper part of the pumping pipe is located in the channel, and the lower part of the pumping pipe is inserted into the relief pipe in sequence and extends into the accumulated water at the bottom of the valve to be drained.

[0008] Optionally, the water pumping pipe and the inner wall of the relief valve connection seat are sealed by an O-ring.

[0009] Optionally, the water pumping pipe comprises a plurality of pipe sections connected in sequence, and the plurality of pipe sections are connected by threads.

[0010] Optionally, a filter screen is installed inside the lower end of the water suction pipe.

[0011] Optionally, the lower end of the relief valve connecting seat is connected to the relief valve port of the relief valve by threading.

[0012] Optionally, the relief valve connecting seat includes a lower fixed seat and a movable upper seat, the lower part of the lower fixed seat is connected to the relief valve port of the relief valve, and the lower fixed seat and the movable upper seat are connected by two symmetrically arranged fixed pull rods, the upper part of the movable upper seat is connected to the discharge ball valve, and a pressure relief valve is installed on the side of the lower fixed seat.

[0013] Optionally, the relief valve connection seat also includes a pressure gauge, and the pressure gauge is installed on the side of the lower fixed seat.

[0014] Optionally, a through hole is provided on the fixed pull rod along the length direction;

[0015] The relief valve connection seat also includes four locking nuts, wherein: two locking nuts are connected to the movable upper seat after passing through two fixed pull rods respectively, and the other two locking nuts are connected to the lower fixed seat after passing through the through holes.

[0016] Optionally, the drain hose is connected to the discharge ball valve via a quick-connect connector.

[0017] Compared with the prior art, this application has at least the following beneficial effects:

[0018] 1. Based on further analysis and research on the existing technical problems, this application provides a gas pipeline pressure drainage device, which is directly connected to the relief valve above the valve to be drained, and can discharge the accumulated water in the valve; the application is simple in operation, easy to disassemble and carry, and has a wide range of applications. At the same time, the pressure difference between the gas pressure in the gas pipeline and the atmospheric pressure is used to discharge the accumulated water in the pipeline, avoiding hot work and having high safety;

[0019] 2. The pumping pipe of the present application is sealed with an O-ring between the inner wall of the connection seat of the relief valve to prevent gas from overflowing; the pumping pipe is composed of multiple pipe sections, and the multiple pipe sections are connected by threads. In actual application, the pumping pipe can be assembled according to the height of the relief pipe, and the installation is fast and convenient;

[0020] 3. A filter is also installed inside the lower end of the water pumping pipe of the present application, which can effectively prevent impurities from clogging the water pumping pipe, is conducive to drainage, and plays a protective role for the equipment;

[0021] 4. The relief valve connection seat of the present application includes components such as a lower fixed seat, a movable upper seat, a fixed pull rod, a pressure relief valve and a pressure gauge. The fixed pull rod serves as a locking device, which can prevent the pressure in the pipeline from popping out the movable upper seat. The pressure gauge can display the gas pressure in the valve to be drained, monitor the pressure changes in the pipeline at any time, and timely understand the operating status of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0023] Figure 1 A schematic diagram of a structure in which a gas pipeline pressure drainage device provided in one embodiment of the present application is installed on a valve to be drained;

[0024] Figure 2 for Figure 1 Structural diagram of the pressure drainage device for gas pipeline;

[0025] Figure 3 for Figure 1 Schematic diagram of the structure located at the pressure drainage device of the gas pipeline Figure 1 ;

[0026] Figure 4 for Figure 1 Schematic diagram of the structure located at the pressure drainage device of the gas pipeline Figure 2 ;

[0027] Figure 5 for Figure 2 Structural schematic diagram of the middle relief valve connection seat;

[0028] Figure 6 for Figure 1 A cross-sectional view of a gas pipeline at a pressure drainage device;

[0029] Figure 7 for Figure 2 Schematic diagram of the structure of the water pump.

[0030] Description of reference numerals:

[0031] 1. Valve to be drained; 2. Drainage device; 21. Drain valve connection seat; 211. Lower fixed seat; 212. Movable upper seat; 213. Pressure relief valve; 214. Locking nut; 215. Fixed pull rod; 216. Pressure gauge; 22. Discharge ball valve; 23. Drain hose; 24. Suction pipe; 25. Quick connector; 26. Sealing ring; 27. Channel; 3. Drain pipe; 4. Drain valve. DETAILED DESCRIPTION

[0032] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0033] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0034] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0035] In one embodiment of the present application, a gas pipeline pressure drainage device is provided, such as Figure 1-Figure 7 As shown, the drainage device is installed on a relief valve 4 above a valve 1 to be drained, and the relief valve 4 is connected to the valve 1 to be drained via a relief pipe 3;

[0036] The drainage device 2 includes a relief valve connection seat 21, a discharge ball valve 22 and a drainage hose 23 connected in sequence. The relief valve connection seat 21 is installed on the relief valve 4, and the relief valve connection seat 21 is provided with a channel 27 connected to the discharge ball valve 22. A pumping pipe 24 is provided in the channel 27. The upper part of the pumping pipe 24 is located in the channel 27, and the lower part of the pumping pipe 24 is inserted into the relief pipe 3 in sequence and extends into the water accumulation at the bottom of the valve 1 to be drained.

[0037] Preferably, if Figure 6 As shown, the water extraction pipe 24 and the inner wall of the relief valve connection seat 21 are sealed by an O-ring 26, and the sealing ring 26 is provided to prevent the gas from overflowing.

[0038] Further preferably, the water pumping pipe 24 includes a plurality of pipe sections connected in sequence, and the plurality of pipe sections are connected by threads; in actual application, the water pumping pipe 24 can be assembled according to the height of the discharge pipe 3 .

[0039] Still more preferably, a filter is installed inside the lower end of the suction pipe 24 (i.e., the bottom inserted into the valve 1 to be drained); the setting of the filter can effectively prevent impurities from clogging the suction pipe 24, which is beneficial to drainage and protects the equipment.

[0040] Preferably, the lower end of the relief valve connection seat 21 is connected to the relief valve port (a threaded port) of the relief valve 4 by threading.

[0041] Preferably, if Figure 2-Figure 6As shown, the relief valve connecting seat 21 includes a lower fixed seat 211 and a movable upper seat 212. The lower part of the lower fixed seat 211 is connected to the relief valve 4 port of the relief valve 4 by threaded connection, and the lower fixed seat 211 and the movable upper seat 212 are connected by two symmetrically arranged fixed pull rods 215. The upper part of the movable upper seat 212 is connected to the discharge ball valve 22. A pressure relief valve 213 is installed on the side of the lower fixed seat 211; the fixed pull rod 215 serves as a locking device to prevent the pressure in the pipeline from popping out the movable upper seat 212. The pressure relief valve 213 is used to relieve the residual pressure between the relief valve 4 and the lower fixed seat 211 after the operation is completed.

[0042] Further preferably, the relief valve connection seat 21 also includes a pressure gauge 216, which can display the gas pressure in the valve 1 to be drained; the pressure gauge 216 is installed on the side of the lower fixed seat 211 and can be set on the side opposite to the pressure relief valve 213.

[0043] Still further preferably, a through hole is provided on the fixed pull rod 215 along the length direction;

[0044] The relief valve connection seat 21 also includes four locking nuts 214 , wherein two locking nuts 214 are connected to the movable upper seat 212 after passing through two fixed pull rods 215 respectively, and the other two locking nuts 214 are connected to the lower fixed seat 211 after passing through the through holes.

[0045] Preferably, the drain hose 23 is connected to the drain ball valve 22 via a quick-connect connector 25 .

[0046] The method of using the above embodiment is as follows:

[0047] The present application uses the vent pipe 3 connected to the valve 1 to be drained as the vent outlet, which is also the only channel connecting the valve 1 to be drained with the outside world. The vent valve 4 at the upper end of the vent pipe 3 is used as the outlet for drainage and connected to the drainage device 2. The vent valve connection seat 21 is tightly connected to the threaded port of the vent valve 4. The vent valve connection seat 21 and the water pumping pipe 24 are assembled together according to the depth of the valve 1 to be drained, and the vent valve connection seat 21 and the vent valve 4 are firmly connected and sealed reliably, so that the water pumping pipe 24 is lowered to the bottom of the valve 1 to be drained; then the discharge ball valve 22 is connected to the vent valve connection seat 21, and the drainage hose 23 is connected to the discharge ball valve 22 through the quick-insert connector 25; when in use, the vent valve 4 is opened when the water pumping pipe 24 is inserted, and after all the above components are assembled, the discharge ball valve 22 is opened to drain the accumulated water in the valve 1 to be drained, and the discharge ball valve 22 is closed when the accumulated water is drained;

[0048] The specific connection method between the relief valve connection seat 21 and the relief valve 4 is as follows:

[0049] First, connect the lower fixed seat 211 with the threaded port of the relief valve 4, then determine the length of the suction pipe 24 according to the depth of the valve 1 to be drained and the height of the relief pipe 3, and install the suction pipe 24 in the channel of the movable upper seat 212, open the relief valve 4 to allow the suction pipe 24 to be lowered to the bottom of the valve 1 to be drained (i.e., the water accumulation place), and when the suction pipe 24 is lowered into place, connect the movable upper seat 212 with the movable upper seat 212 through the fixed pull rod 215, and lock it with the locking nut 214, and the gas pressure in the valve 1 to be drained can be displayed by the pressure gauge 216 on the lower fixed seat 211; then connect the discharge ball valve 22 with the movable upper seat 212, and one end of the drainage hose 23 is connected to the discharge ball valve 22 through the quick-plug connector 25.

[0050] In summary, this application has at least the following advantages:

[0051] 1. Aiming at the problem of water accumulation in gas valves, this gas pipeline pressure drainage device was developed. By directly connecting the drainage device to the relief valve above the valve to be drained, the water accumulated in the valve can be discharged. The device is easy to use, simple to disassemble, easy to carry, and widely used. The pressure difference between the gas pressure in the gas pipeline and the atmospheric pressure is used to discharge the water in the pipeline, avoiding hot work and high safety.

[0052] 2. The inner wall of the pumping pipe and the relief valve connection seat is sealed by an O-ring to prevent gas from overflowing; the pumping pipe is composed of multiple pipe sections, and the multiple pipe sections are connected by threads. In actual application, the pumping pipe can be assembled according to the height of the relief pipe, and the installation is fast and convenient;

[0053] 3. A filter is installed at the lower end of the suction pipe, which can effectively prevent impurities from clogging the suction pipe, facilitate drainage, and protect the equipment.

[0054] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A gas pipeline pressure drainage device, characterized in that: The drainage device is installed on the relief valve above the valve to be drained, and the relief valve is connected to the valve to be drained via a relief pipe; The drainage device includes a relief valve connection seat, a discharge ball valve and a drainage hose which are connected in sequence. The relief valve connection seat is installed on the relief valve, and a channel connected to the discharge ball valve is provided inside the relief valve connection seat. A pumping pipe is provided in the channel. The upper part of the pumping pipe is located in the channel, and the lower part of the pumping pipe is inserted into the relief pipe in sequence and extends into the accumulated water at the bottom of the valve to be drained.

2. The gas pipeline pressure drainage device according to claim 1, characterized in that: The water pumping pipe and the inner wall of the relief valve connection seat are sealed by an O-ring.

3. The gas pipeline pressure drainage device according to claim 2 is characterized in that: The water pumping pipe comprises a plurality of pipe sections connected in sequence, and the plurality of pipe sections are connected by threads.

4. The gas pipeline pressure drainage device according to claim 3 is characterized in that: A filter screen is installed inside the lower end of the water pumping pipe.

5. The gas pipeline pressure drainage device according to claim 1, characterized in that: The lower end of the relief valve connecting seat is connected to the relief valve port of the relief valve by threading.

6. The gas pipeline pressure drainage device according to claim 5, characterized in that: The relief valve connecting seat includes a lower fixed seat and a movable upper seat, the lower part of the lower fixed seat is connected to the relief valve port of the relief valve, and the lower fixed seat and the movable upper seat are connected by two symmetrically arranged fixed pull rods, the upper part of the movable upper seat is connected to the discharge ball valve, and a pressure relief valve is installed on the side of the lower fixed seat.

7. The gas pipeline pressure drainage device according to claim 6, characterized in that: The relief valve connection seat also includes a pressure gauge, and the pressure gauge is installed on the side of the lower fixing seat.

8. The gas pipeline pressure drainage device according to claim 6 or 7, characterized in that: The fixed pull rod is provided with a through hole along the length direction; The relief valve connection seat also includes four locking nuts, wherein: two locking nuts are connected to the movable upper seat after passing through two fixed pull rods respectively, and the other two locking nuts are connected to the lower fixed seat after passing through the through holes.

9. The gas pipeline pressure drainage device according to claim 1, characterized in that: The drainage hose is connected to the discharge ball valve via a quick-connect connector.

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