Auxiliary opening device for monitoring pressure regulating valve

Abstract

The utility model discloses a monitoring pressure regulating valve auxiliary opening device which comprises a first air supply piece, a pressure reducing valve, a confluence piece, a pressure measuring piece, a check valve, a second air supply piece and a first connecting pipe, the confluence piece is provided with four connectors, and the four connectors are the first connector, the second connector, the third connector and the fourth connector respectively. An air outlet of the second air supply piece is communicated with the first connector through a pressure reducing valve, the pressure measuring piece is installed at the second connector, one end of the first connecting pipe is communicated with the third connector through the check valve, an air outlet of the first air supply piece is communicated with the fourth connector, and a ball valve is arranged at the communication position. The monitoring pressure regulating valve is simple in structure, the monitoring pressure regulating valve body can be assisted to be opened, and the sealing performance of the monitoring pressure regulating valve body can also be detected.

Description

Technical Field

[0001] The utility model belongs to the field of auxiliary equipment for monitoring pressure regulating valves, and in particular relates to an auxiliary opening device for monitoring pressure regulating valves. Background Art

[0002] FL series monitoring pressure regulating valves are widely used in gas transmission stations of Sichuan-East Gas Transmission. As one of the important components of the pressure regulating skid and also a key equipment, the safe operation of the monitoring pressure regulating valve is of vital importance. The FL series monitoring pressure regulating valve is usually in a closed state under the action of the spring when it is not in use and after the upstream and downstream pressures are balanced. However, during the inspection and maintenance process, the monitoring pressure regulating valve is usually required to be in a fully open state due to process requirements, such as when nitrogen replacement is carried out after the station is vented, and the downstream user pipeline needs to be purged. Before the station is vented for hot work, in order to fully open the monitoring pressure regulating valve, the pressure pipeline connected to its pilot can usually be cut off and shielded, and the pressure regulating valve is kept in a fully open state under the pressure of the pressure pipeline. However, this method is not very reliable due to the small diameter and small pipe capacity of the pressure pipeline, and the valve state is maintained by the residual pressure of the pressure pipeline alone. Especially for hot work and long nitrogen replacement operation cycles, once there is a slight leak in the sealing connection, the pressure regulating valve will be closed, affecting the progress and safety of the operation. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a monitoring pressure regulating valve auxiliary opening device which has a simple structure and multiple functions and can assist in opening the monitoring pressure regulating valve and detect the airtightness of the monitoring pressure regulating valve.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a monitoring pressure regulating valve auxiliary opening device, comprising an air supply component 1, a pressure reducing valve, a confluence component, a pressure measuring component, a check valve, an air supply component 2 and a first connecting pipe, the confluence component having four interfaces, the four interfaces being interface 1, interface 2, interface 3 and interface 4 respectively, the air outlet of the air supply component 2 being connected with the interface 1 through the pressure reducing valve, the pressure measuring component being installed at the interface 2, one end of the first connecting pipe being connected with the interface 3 through the check valve, the air outlet of the air supply component 1 being connected with the interface 4, and a ball valve being arranged at the connecting point, the other end of the first connecting pipe being connected with the load channel of the monitoring pressure regulating valve body.

[0005] The beneficial effect of the above technical solution is that: in this way, the corresponding end of the first connecting pipe can be connected and communicated with the load channel of the monitoring pressure regulating valve body, and then the ball valve and the pressure reducing valve can be closed, and then the air supply part can be used to supply air, and then the pressure reducing valve can be slowly opened to meet the pressure requirement. At this time, the air pressure supplied by the second air supply part can open the monitoring pressure regulating valve body. When testing the sealing performance of the monitoring pressure regulating valve body, the pressure reducing valve can be closed, the ball valve can be opened, and then air can be supplied through the first air supply part. The first air supply part is mainly used for short-term testing on site. If the air supply through the first air supply part can make the monitoring pressure regulating valve body open and remain in the open state for a period of time, it proves that the main diaphragm of the monitoring pressure regulating valve is well sealed. If the test pressure cannot be maintained after the air supply from the first air supply part so that the monitoring pressure regulating valve body can be opened, it means that the sealing performance of the main diaphragm of the monitoring pressure regulating valve body does not meet the requirements.

[0006] The air supply component 1 described in the above technical solution is an air pump.

[0007] The beneficial effect of the above technical solution is that the gas supply is convenient and the gas supply rate is relatively slow, which can meet the test requirements.

[0008] The pressure measuring piece described in the above technical solution is a pressure gauge.

[0009] The beneficial effect of the above technical solution is that the pressure in the return member (ie, the pressure in the first connecting pipe) can be determined by the pressure measuring member.

[0010] The second gas supply component described in the above technical solution is a gas storage cylinder.

[0011] The beneficial effects of the above technical solution are: the gas supply flow is large, and the gas supply pressure can meet the needs of opening the monitoring household pressure regulating valve body.

[0012] The manifold described in the above technical solution is a four-way manifold.

[0013] The beneficial effect of the above technical solution is that it has a simple structure.

[0014] The above technical solution also includes a second connecting pipe, and the air outlet of the second air supply component is connected to the pressure reducing valve through the second connecting pipe.

[0015] The beneficial effect of the above technical solution is that a certain distance can be maintained between the gas supply part 1 and the gas supply part 2 to facilitate the use of the monitoring pressure regulating valve auxiliary opening device.

[0016] The above technical solution also includes a third connecting pipe, and the air outlet of the air supply component 1 is connected to the ball valve through the third connecting pipe.

[0017] The beneficial effect of the above technical solution is that the distance between the air supply component 1 and the air supply component 2 can be further increased so that the auxiliary opening device for monitoring the pressure regulating valve is more flexible in use.

[0018] In the above technical solution, the first connecting pipe, the second connecting pipe and the third connecting pipe are all pressure-resistant hoses.

[0019] The beneficial effect of the above technical solution is that the entire monitoring pressure regulating valve auxiliary opening device has good durability.

[0020] In the above technical solution, the lengths of the first connecting pipe, the second connecting pipe and the third connecting pipe are all 0.2-5m.

[0021] The beneficial effects of the above technical solution are: its structure is simple and easy to store.

[0022] In the above technical solution, the ball valve is connected and communicated with the interface four, the pressure reducing valve is connected and communicated with the interface one, and the check valve is connected and communicated with the interface three.

[0023] The beneficial effect of the above technical solution is that it makes the structure of the entire monitoring pressure regulating valve auxiliary opening device more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a simplified structural diagram of the auxiliary opening device for monitoring the pressure regulating valve according to an embodiment of the utility model;

[0025] Figure 2 This is a structural schematic diagram of the connection between the monitoring pressure regulating valve auxiliary opening device and the monitoring pressure regulating valve body described in an embodiment of the utility model.

[0026] In the figure: 1. Air supply component 1; 2. Pressure reducing valve; 3. Manifold; 4. Pressure measuring component; 5. Check valve; 6. Air supply component 2; 7a. First connecting pipe; 7b. Second connecting pipe; 7c. Third connecting pipe; 8. Ball valve; 9. Monitoring pressure regulating valve body. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. According to the following description and claims, the advantages and features of the present invention will be more clearly described. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0028] like Figure 1 and Figure 2As shown, this embodiment provides a monitoring pressure regulating valve auxiliary opening device, including an air supply component 1, a pressure reducing valve 2, a confluence component 3, a pressure measuring component 4, a check valve 5, an air supply component 2 6 and a first connecting pipe 7a, the confluence component 3 has four interfaces, and the four interfaces are interface 1, interface 2, interface 3 and interface 4 respectively. The air outlet of the air supply component 2 6 is connected with the interface 1 through the pressure reducing valve 2, the pressure measuring component 4 is installed at the interface 2, one end of the first connecting pipe 7a is connected with the interface 3 through the check valve 5, the air outlet of the air supply component 1 is connected with the interface 4, and a ball valve 8 is provided at the connection point, and the other end of the first connecting pipe 7a is connected with the load channel of the monitoring pressure regulating valve body, so that the first connecting pipe can be connected first The corresponding end of the connecting pipe is connected and communicated with the load channel of the monitoring pressure regulating valve body, and then the ball valve and the pressure reducing valve are closed, and then the air supply is used to supply air, and then the pressure reducing valve is slowly opened to meet the pressure requirement. At this time, the air pressure supplied by the second air supply can open the monitoring pressure regulating valve body. When testing the sealing performance of the monitoring pressure regulating valve body, the pressure reducing valve can be closed, and the ball valve can be opened, and then air is supplied through the first air supply. The first air supply is mainly used for short-term testing on site. If the air supply through the first air supply can make the monitoring pressure regulating valve body open and remain open for a period of time, it proves that the main diaphragm of the monitoring pressure regulating valve is well sealed. If the test pressure cannot be maintained after the air supply from the first air supply so that the monitoring pressure regulating valve body can be opened, it means that the sealing performance of the main diaphragm of the monitoring pressure regulating valve body does not meet the requirements.

[0029] The air supply component described in the above technical solution is an air pump, which is convenient for air supply and has a relatively slow air supply rate, and can meet the test requirements of sealing detection.

[0030] The pressure measuring member 4 in the above technical solution is a pressure gauge, so the pressure in the reflux member (ie, the pressure in the first connecting pipe) can be determined by the pressure measuring member.

[0031] The gas supply component 2 6 described in the above technical solution is a gas storage bottle, which has a large gas supply flow rate and a gas supply pressure that can meet the needs of opening the monitoring household pressure regulating valve body.

[0032] The collector 3 in the above technical solution is a four-way collector with a simple structure.

[0033] The above technical solution also includes a second connecting pipe 7b, and the air outlet of the air supply component 2 6 is connected to the pressure reducing valve 2 through the second connecting pipe 7b, so that a certain distance can be maintained between the air supply component 1 and the air supply component 2 to facilitate the use of the monitoring pressure regulating valve auxiliary opening device.

[0034] The above technical solution also includes a third connecting pipe 7c, and the air outlet of the air supply component 1 is connected to the ball valve 8 through the third connecting pipe 7c, so that the distance between the air supply component 1 and the air supply component 2 can be further increased to make the monitoring pressure regulating valve auxiliary opening device more flexible when used.

[0035] In the above technical solution, the first connecting pipe 7a, the second connecting pipe 7b and the third connecting pipe 7c are all pressure-resistant hoses, so that the entire monitoring pressure regulating valve auxiliary opening device has good durability.

[0036] In the above technical solution, the lengths of the first connecting tube 7a, the second connecting tube 7b and the third connecting tube 7c are all 0.2-5m, and the structure is simple and the storage is convenient.

[0037] In the above technical solution, the ball valve 8 is connected and communicated with the interface four, the pressure reducing valve 2 is connected and communicated with the interface one, and the check valve 5 is connected and communicated with the interface three, so that the structure of the entire monitoring pressure regulating valve auxiliary opening device is more compact.

[0038] Since the air supply rate of the air supply component 1 is relatively slow, when the sealing of the monitoring pressure regulating valve body is tested, if there is a leak in the monitoring pressure regulating valve body, it is difficult to open the monitoring pressure regulating valve body even if the air supply of the air supply component 1 continues. Even after it is opened, when the air supply of the first air supply component is stopped, the monitoring pressure regulating valve body will eventually close by itself after a period of time due to leakage and pressure drop.

[0039] The various components of the monitoring pressure regulating valve auxiliary opening device described in this embodiment must ensure good sealing performance during assembly to avoid air leakage. It mainly has two functions: one is to assist in opening the monitoring pressure regulating valve body, and the other is to detect the sealing performance of the valve core membrane of the monitoring pressure regulating valve body.

[0040] When assisting in opening the monitoring pressure regulating valve body, the air supply component 2 is in operation, the pressure reducing valve is opened, the ball valve is closed, and the air supply component 1 stops operating; when performing a sealing test on the monitoring pressure regulating valve body, the air supply component 2 stops operating, the pressure reducing valve is closed, the ball valve is opened, and the air supply component 1 is in operation.

[0041] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A monitoring pressure regulating valve auxiliary opening device, characterized in that: The invention comprises an air supply component 1 (1), a pressure reducing valve (2), a flow confluence component (3), a pressure measuring component (4), a check valve (5), an air supply component 2 (6) and a first connecting pipe (7a), wherein the flow confluence component (3) has four interfaces, which are interface 1, interface 2, interface 3 and interface 4 respectively; the air outlet of the air supply component 2 (6) is connected to the interface 1 through the pressure reducing valve (2); the pressure measuring component (4) is installed at the interface 2; one end of the first connecting pipe (7a) is connected to the interface 3 through the check valve (5); the air outlet of the air supply component 1 (1) is connected to the interface 4, and a ball valve (8) is provided at the connection point; the other end of the first connecting pipe (7a) is connected to the load channel of the monitoring pressure regulating valve body.

2. The monitoring pressure regulating valve auxiliary opening device according to claim 1, characterized in that: The air supply component 1 (1) is an air pump.

3. The monitoring pressure regulating valve auxiliary opening device according to claim 1, characterized in that: The pressure measuring piece (4) is a pressure gauge.

4. The monitoring pressure regulating valve auxiliary opening device according to claim 1, characterized in that: The second gas supply component (6) is a gas storage bottle.

5. The monitoring pressure regulating valve auxiliary opening device according to claim 1, characterized in that: The current collector (3) is a four-way connector.

6. The monitoring pressure regulating valve auxiliary opening device according to claim 1, characterized in that: It also comprises a second connecting pipe (7b), and the gas outlet of the second gas supply component (6) is connected to the pressure reducing valve (2) through the second connecting pipe (7b).

7. The monitoring pressure regulating valve auxiliary opening device according to claim 6, characterized in that: It also comprises a third connecting pipe (7c), and the gas outlet of the gas supply part 1 (1) is connected to the ball valve (8) through the third connecting pipe (7c).

8. The monitoring pressure regulating valve auxiliary opening device according to claim 7, characterized in that: The first connecting pipe (7a), the second connecting pipe (7b) and the third connecting pipe (7c) are all pressure-resistant hoses.

9. The monitoring pressure regulating valve auxiliary opening device according to claim 8, characterized in that: The lengths of the first connecting pipe (7a), the second connecting pipe (7b) and the third connecting pipe (7c) are all 0.2-5 m.

10. The monitoring pressure regulating valve auxiliary opening device according to claim 7, characterized in that: The ball valve (8) is connected to and communicated with the interface four, the pressure reducing valve (2) is connected to and communicated with the interface one, and the check valve (5) is connected to and communicated with the interface three.

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