CN217838829U - Monitoring pressure regulating valve director filter equipment - Google Patents

Abstract

The utility model relates to a filtering device for a pilot of a monitoring pressure regulating valve. It can prevent the dust and impurities in the natural gas from entering the pilot of the monitoring pressure regulating valve and causing the pilot to malfunction. Including filter unit, process switching unit; filter unit includes shell, discharge port, circulation port, air inlet port, differential pressure port, bushing, sealing gasket, spring, filter element, air outlet port, differential pressure transmitter, five valves group; the process switching unit includes the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the pressure pipe, the first ferrule tee, the second ferrule tee, thread , Quick card set. The utility model device can effectively prevent dust and impurities in natural gas from entering the pilot of the monitoring pressure regulating valve, prevent the pilot from being blocked or the valve port pad from being damaged, and ensure the normal operation of the pilot of the monitoring pressure regulating valve. At the same time, it has a self-cleaning function, which can Remove the dust and impurities of the filter element, realize the maintenance-free filter device, and greatly reduce the risks of fire and explosion caused by frequent maintenance operations.

Description

A filter device for monitoring and regulating valve pilot

technical field

The utility model relates to the technical field of filtering devices, in particular to a filtering device for a pilot of a monitoring pressure regulating valve.

Background technique

During the long-distance transportation of natural gas, the pressure is high. When it is distributed to gas companies, factories and other users, it is necessary to use a monitoring pressure regulating valve to reduce the pressure and adjust the flow rate. The high-pressure natural gas in the natural gas pipeline is used as the power source to control and monitor the pressure regulating valve to adjust the pressure and flow of natural gas in the pipeline. During the process of natural gas transportation, the dust content in the upstream gas is relatively high, which may easily cause blockage of the pressure introduction pipe of the monitoring pressure regulating valve and damage to the valve port pad of the pilot of the monitoring pressure regulating valve, resulting in failure of the monitoring pressure regulating valve, causing overpressure or shutdown of the pipeline. Gas and other safety accidents affect normal safe production. Therefore, it is necessary to regularly disassemble, clean and maintain components such as the pressure induction pipe and the pilot of the monitoring pressure regulating valve. Since natural gas is a flammable and explosive gas, fires and explosions are prone to occur during disassembly and maintenance. The dismantling and maintenance process is complicated and risky. At the same time, the gas needs to be shut down during maintenance, which affects the normal gas consumption of residents and factories.

Utility model content

(1) Purpose of utility model

In order to solve the technical problems existing in the background technology, the utility model proposes a filter device for the pilot of the monitoring pressure regulating valve. By setting the filter unit to filter the dust and impurities in the natural gas, it prevents the dust and impurities from entering the pilot of the monitoring pressure regulating valve and prevents the pilot of the monitoring and regulating valve from Failure of the pressure valve pilot; by setting the cycle and self-cleaning process, the filter device is self-cleaning and maintenance-free, which greatly reduces the risk caused by frequent maintenance operations. Through a series of measures, this device can greatly improve the monitoring and regulating pressure. The operation stability of the valve pilot ensures the safety and stability of natural gas transmission.

(2) Technical solution

The utility model provides a filtering device for a pilot of a monitoring pressure regulating valve, which includes a filtering unit and a process switching unit; the filtering unit includes a shell, a discharge interface, a circulation interface, an air inlet interface, a differential pressure interface, a bushing, and a sealing gasket , spring, filter element, air outlet port, differential pressure transmitter, five-valve group; the process switching unit includes the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, and the pressure pipe , the first ferrule tee, the second ferrule tee, thread, quick ferrule;

The filter unit is equipped with a shell, and the shell is equipped with a discharge port, a circulation port, an air inlet port, a differential pressure port, a bushing, a sealing gasket, a spring, a filter element, and an air outlet port. The natural gas enters the monitoring pressure regulating valve through the filter unit device;

The natural gas pipeline is connected to the inlet of the first control valve through the pressure pipe, the outlet of the first control valve is connected to the inlet port of the lower part of the filter unit through the pressure pipe, and the gas outlet port of the upper part of the filter unit is connected to the inlet of the second control valve through the pressure pipe , the outlet of the second control valve is connected to the pilot of the monitoring pressure regulating valve through the pressure introduction pipe;

The circulation interface at the lower part of the filter unit is connected to the inlet of the third control valve through the pressure pipe, and the outlet of the third control valve is connected to the natural gas pipeline through the pressure pipe;

The differential pressure interface of the filter unit is connected to the five-valve group through a pressure pipe, and the differential pressure transmitter is installed on the five-valve group;

The discharge port at the lower part of the filter unit is connected to the fifth control valve through a pressure pipe;

The inlet of the fourth control valve is connected to the natural gas pipeline through the first ferrule tee on the pressure induction pipe, and the outlet of the fourth control valve is connected to the pilot of the monitoring pressure regulating valve through the second ferrule tee on the pressure induction pipe.

Preferably, the bushing of the filter unit is threadedly connected to the casing of the filter unit, and a sealing gasket is provided at the bottom of the bushing.

Preferably, the discharge port, the circulation port, the air inlet port, the differential pressure port and the air outlet port on the filter unit are connected by quick ferrules.

Preferably, the filter element is a copper powder sintered filter element, the diameter of the filter hole of the filter element is 1-5 μm, and the filter element is fixed by a spring.

Preferably, the filter unit is provided with a circulation interface, which constitutes a circulation process flow together with the pressure introduction pipe and the third control valve.

Preferably, the process switching unit is provided with a fourth control valve, which forms a bypass process flow together with the pressure introduction pipe, the first ferrule tee, and the second ferrule tee.

Preferably, the process switching unit is provided with a fifth control valve, which together with the second control valve, third control valve, fourth control valve, fifth control valve and pressure introduction pipe constitutes a self-cleaning process flow.

Preferably, the filter unit is provided with a differential pressure transmitter capable of remote transmission of analog signals.

The above-mentioned technical solution of the utility model has the following beneficial technical effects: the device can filter the dust impurities in the natural gas by setting the filter unit, effectively prevent dust impurities from entering the pilot of the monitoring pressure regulating valve, and prevent the pilot of the monitoring pressure regulating valve from being blocked or The valve port pad is damaged to ensure the normal operation of the pilot of the monitoring pressure regulating valve; since natural gas is a flammable and explosive gas, fire and explosion are prone to occur during disassembly and maintenance, and the disassembly and maintenance process is complicated and risky. The cleaning process can remove the filtered dust and impurities in time, realize the maintenance-free filter device, and greatly reduce the risks of fire, explosion and other operations caused by frequent maintenance operations.

Description of drawings

Fig. 1 is a structural schematic diagram of a pilot filtering device for a monitoring pressure regulating valve proposed by the present invention.

Fig. 2 is a structural schematic diagram of the filter unit in the filter device for the pilot of the monitoring pressure regulating valve proposed by the utility model.

Fig. 3 is an enlarged schematic diagram of the threaded connection between the bushing and the shell of the filter unit in the filter device for the pilot of the monitoring pressure regulating valve proposed by the utility model.

Fig. 4 is an enlarged structural schematic diagram of a filter element, a spring and a quick ferrule of the filter unit in the filter device for the pilot of the monitoring pressure regulating valve proposed by the utility model.

Fig. 5 is a schematic diagram of the installation structure of the differential pressure transmitter of the filter unit in the filter device of the monitoring pressure regulating valve pilot proposed by the utility model.

Reference signs: 1. filter unit; 2. process switching unit; 3. shell; 4. discharge port; 5. circulation port; 6. air intake port; 7. differential pressure port; 8. bushing; Sealing gasket; 10, spring; 11, filter element; 12, air outlet port; 13, differential pressure transmitter; 14, five-valve group; 15, first control valve; 16, second control valve; 17, third control valve ; 18. The fourth control valve; 19. The fifth control valve; 20. The pressure introduction pipe; 21. The first ferrule tee; 22. The second ferrule tee; 23. Natural gas pipeline; 24. Monitoring pressure regulating valve ; 25, the pilot of the monitoring pressure regulating valve; 26, the thread; 27, the quick ferrule.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

As shown in Figures 1-5, the utility model proposes a filter device for monitoring and regulating valve pilot, which includes a filter unit 1 and a process switching unit 2; the filter unit 1 includes a housing 3, a discharge interface 4, and a circulation interface 5 , air inlet port 6, differential pressure port 7, bushing 8, sealing gasket 9, spring 10, filter element 11, air outlet port 12, differential pressure transmitter 13, five-valve group 14; process switching unit 2 includes a first control valve 15. The second control valve 16, the third control valve 17, the fourth control valve 18, the fifth control valve 19, the pressure introduction pipe 20, the first ferrule tee 21, the second ferrule tee 22, thread 26, Fast ferrule 27;

The filter unit 1 is provided with a housing 3, and the housing 3 is provided with a discharge port 4, a circulation port 5, an air inlet port 6, a differential pressure port 7, a bushing 8, a sealing gasket 9, a spring 10, a filter element 11, and an air outlet port 12. Natural gas enters the pilot 25 of the monitoring pressure regulating valve through the filter unit 1;

The natural gas pipeline 23 is connected to the inlet of the first control valve 15 through the pressure introduction pipe 20, the outlet of the first control valve 15 is connected to the air inlet port 6 at the lower part of the filter unit 1 through the pressure introduction pipe 20, and the gas outlet port 12 at the upper part of the filter unit 1 is connected through the introduction pipe 20. The pressure pipe 20 is connected to the inlet of the second control valve 16, and the outlet of the second control valve 16 is connected to the pilot 25 of the monitoring pressure regulating valve through the pressure introduction pipe 20;

The circulation interface 5 at the lower part of the filter unit 1 is connected to the inlet of the third control valve 17 through the pressure introduction pipe 20, and the outlet of the third control valve 17 is connected to the natural gas pipeline 23 through the pressure introduction pipe 20;

The differential pressure interface 7 of the filter unit 1 is connected to the five-valve group 14 through the pressure introduction pipe 20, and the differential pressure transmitter 13 is installed on the five-valve group 14;

The discharge port 4 at the lower part of the filter unit 1 is connected to the fifth control valve 19 through the pressure introduction pipe 20;

The inlet of the fourth control valve 18 is connected to the natural gas pipeline 23 through the first ferrule tee 21 on the pressure introduction pipe 20 , and the outlet of the fourth control valve 18 is connected to the monitoring pressure regulation through the second ferrule tee 22 on the pressure introduction pipe 20 . Valve pilot 25 is connected.

In the present utility model, the natural gas in the natural gas pipeline 23 flows into the filter unit 1 from the air inlet port 6 after being controlled by the opening of the first control valve 15. Clean natural gas flows out from the gas outlet port 12, and after being controlled by the opening of the second control valve 16, it enters the pilot 25 of the monitoring pressure regulating valve to control the pressure, flow and other parameters of the monitoring pressure regulating valve 24; part of the natural gas entering the filter unit 1 is circulated The outflow from the interface 5 is controlled by the opening of the third control valve 17, and then flows back into the natural gas pipeline 23 to realize the gas circulation flow of the natural gas in the lower part of the filter unit 1, and take away part of the dust and impurities inside the filter unit 1; The filter 13 checks the differential pressure of the filter unit 1. When the differential pressure is above 100KPa, open the fourth control valve 18 and the second control valve 16, close the first control valve 15 and the third control valve 17, and slowly open the fifth control valve 19 , so that natural gas enters the filter unit 1 reversely from the gas outlet port 12, flows out of the filter unit 1 from the discharge port 4 through the opening control of the fifth control valve 19, and backwashes the filter element 11 of the filter unit 1 through the reverse flow of natural gas , remove the dust and impurities at the bottom of the filter element 11, restore the filtering function of the filter element 11, and realize the self-cleaning ability of the filter unit 1; by opening the fourth control valve 18, the natural gas can pass through the filter unit 1 and directly enter the pilot 25 of the monitoring pressure regulating valve, In the case of a failure of the filter unit 1, ensure the normal operation of the monitoring pressure regulating valve 24, realize the bypass function of the filter unit 1, and at the same time, by closing the first control valve 15, the second control valve 16, and the third control valve 17, slowly Open the fifth control valve 19 to vent the natural gas in the filter unit 1, so that the filter unit 1 can be maintained without stopping gas.

In an optional embodiment, the bushing 8 of the filter unit 1 is connected with the housing 3 of the filter unit 1 using a thread 26, and the bottom of the bush 8 is provided with a sealing gasket 9; compared with the flange connection, the connection of the thread 26 The sealing performance is better, the disassembly is more convenient, the connection is stronger, and the filter element 11 can be replaced and repaired quickly. At the same time, the bottom of the bushing 8 is equipped with a sealing gasket 9, which can achieve stronger sealing performance for high-pressure natural gas.

In an optional implementation case, the discharge port 4, the circulation port 5, the air inlet port 6, the differential pressure port 7, and the air outlet port 12 on the filter unit 1 are connected by quick ferrules 27; they are connected with flanges, welding, etc. Compared with the technology, the quick ferrule 27 can flexibly adjust the installation direction and angle of the pressure induction pipe 20, and can also quickly connect, install and disassemble the pressure induction pipe 20 and the filter unit 1, which greatly facilitates the installation and maintenance of the equipment.

In an optional embodiment, the filter element 11 is a copper powder sintered filter element, the diameter of the filter hole of the filter element 11 is 1-5 μm, and the filter element 11 is fixed by a spring 10; the copper powder sintered filter element is completely made of spherical powder through mixing-pressing-sintering- It has high porosity, uniform and smooth pore diameter, small initial resistance, stable penetration, high filtration accuracy, etc., and can better withstand the high pressure and impact of natural gas. Form a filter cake, easy to blow back and regenerate, recycle, can realize the self-cleaning function of the filter element 11, and reduce maintenance costs. Convenient. At the same time, the diameter of the filter hole of the filter element 11 is in the range of 1-5 μm, which can remove most of the dust and impurities in the natural gas, and provide clean natural gas to the pilot 25 of the monitoring pressure regulating valve. The filter unit 1 is fixed by a spring 10 in the housing 3 The filter element 11 can ensure that the filter element 11 is firmly installed, and the impact of vibration on the filter performance of the filter element 11 can be buffered.

In an optional implementation case, the filter unit 1 is provided with a circulation interface 5, which forms a circulation process together with the pressure introduction pipe 20 and the third control valve 17; by setting the circulation process, the gas in the natural gas pipeline 23 enters the filter unit 1 After that, it can return to the natural gas pipeline 23 again to form a gas flow cycle. The dust and impurities filtered by the filter unit 1 can be taken away by the circulation process to realize the automatic cleaning ability of the filter unit 1, prevent the filter element 11 from being blocked, and ensure that the filter unit 1 normal operation.

In an optional implementation case, the process switching unit 2 is provided with a fourth control valve 18, which forms a bypass process together with the pressure introduction pipe 20, the first ferrule tee 21, and the second ferrule tee 22; by setting Bypass the process flow, the gas in the natural gas pipeline 23 can directly pass through the filter unit 1 to the pilot 25 of the monitoring pressure regulating valve. When the filter unit 1 breaks down or needs maintenance, it can ensure Monitor the normal operation of the pilot 25 of the pressure regulating valve to realize the fault repair and daily maintenance of the filter unit 1 .

In an optional embodiment, the process switching unit 2 is provided with a fifth control valve 19, which forms a self-cleaning process together with the second control valve 16, the third control valve 17, the fourth control valve 18, and the pressure introduction pipe 20; When there are a lot of dust and impurities in the natural gas, and the filter element 11 in the filter unit 1 is blocked, the fourth control valve 18 and the second control valve 16 are opened, the first control valve 15 and the third control valve 17 are closed, and the fifth control valve is slowly opened. The valve 19 allows the natural gas to enter the filter unit 1 in reverse from the gas outlet port 12, and then flows out of the filter unit 1 from the discharge port 4 through the valve opening control of the fifth control valve 19, through which the natural gas flows in reverse to filter the filter element 11 of the filter unit 1 Backwashing removes dust and impurities at the bottom of the filter element 11, restores the filtering function of the filter element 11, and realizes the self-cleaning ability of the filter unit 1.

In an optional implementation case, the filter unit 1 is equipped with a differential pressure transmitter 13 with the function of remote transmission of analog signals; Differential pressure value to know the operation status of the filter unit 1 in time. When the differential pressure is above 100KPa, the filter element 11 of the filter unit 1 is backwashed and cleaned through the self-cleaning process to ensure the normal operation of the filter unit 1.

It should be understood that the above-mentioned specific embodiments of the present utility model are only used to illustrate or explain the principle of the present utility model, and do not constitute a limitation to the present utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model shall be included in the protection scope of the present utility model. Furthermore, the appended claims are intended to cover all changes and modifications that come within the scope and boundaries of the appended claims, or equivalents of such scope and boundaries.

Claims (8)

1. A pilot filter device for a monitoring pressure regulating valve, characterized in that it includes a filter unit (1), a process switching unit (2); the filter unit (1) includes a housing (3), a discharge interface (4), Circulation interface (5), air inlet interface (6), differential pressure interface (7), bushing (8), sealing washer (9), spring (10), filter element (11), air outlet interface (12), differential pressure Transmitter (13), five-valve group (14); process switching unit (2) includes first control valve (15), second control valve (16), third control valve (17), fourth control valve ( 18), fifth control valve (19), pressure induction pipe (20), first ferrule tee (21), second ferrule tee (22), thread (26), quick ferrule (27); The filter unit (1) is provided with a housing (3), and the housing (3) is provided with a discharge port (4), a circulation port (5), an air inlet port (6), a differential pressure port (7), and a bushing (8), sealing gasket (9), spring (10), filter element (11), gas outlet port (12), natural gas enters the pilot (25) of the monitoring pressure regulating valve through the filter unit (1); The natural gas pipeline (23) is connected to the inlet of the first control valve (15) through the pressure introduction pipe (20), and the outlet of the first control valve (15) is connected to the air inlet port ( 6) Connection, the air outlet port (12) on the upper part of the filter unit (1) is connected to the inlet of the second control valve (16) through the pressure introduction pipe (20), and the outlet of the second control valve (16) is connected to the inlet of the second control valve (16) through the pressure introduction pipe (20) Monitor pressure regulating valve pilot (25) connection; The circulation interface (5) at the lower part of the filter unit (1) is connected to the inlet of the third control valve (17) through the pressure introduction pipe (20), and the outlet of the third control valve (17) is connected to the natural gas pipeline (23) through the pressure introduction pipe (20) )connect; The differential pressure interface (7) of the filter unit (1) is connected to the five-valve group (14) through the pressure introduction pipe (20), and the differential pressure transmitter (13) is installed on the five-valve group (14); The discharge port (4) at the lower part of the filter unit (1) is connected to the fifth control valve (19) through the pressure introduction pipe (20); The inlet of the fourth control valve (18) is connected to the natural gas pipeline (23) through the first ferrule tee (21) on the pressure induction pipe (20), and the outlet of the fourth control valve (18) is connected through the pressure induction pipe (20). The second ferrule tee (22) is connected with the pilot (25) of the monitoring pressure regulating valve. 2. The monitoring and regulating valve pilot filter device according to claim 1, characterized in that: the bushing (8) of the filter unit (1) and the housing (3) of the filter unit (1) adopt threads (26) connection, the bottom of the bushing (8) is provided with a sealing washer (9). 3. The filter device for monitoring and regulating valve pilot according to claim 1, characterized in that: the discharge port (4), the circulation port (5), the air inlet port (6), the differential port on the filter unit (1) The pressure port (7) and the air outlet port (12) are connected by a quick ferrule (27). 4. The filter device for monitoring and regulating valve pilot according to claim 1, characterized in that: the filter element (11) adopts a copper powder sintered filter element, the filter element (11) has a filter hole diameter of 1-5 μm, and the filter element (11) adopts a spring (10) FIXED. 5. The filter device for monitoring and regulating valve pilot according to claim 1, characterized in that: the filter unit (1) is provided with a circulation interface (5), together with the pressure introduction pipe (20) and the third control valve (17) Constitute a cycle process. 6. The filter device for monitoring and regulating valve pilot according to claim 1, characterized in that: the process switching unit (2) is provided with a fourth control valve (18), which is connected with the pressure induction pipe (20), the first ferrule three Pass (21) and the second ferrule tee (22) constitute the bypass process together. 7. The filter device for monitoring and regulating valve pilot according to claim 1, characterized in that: the process switching unit (2) is provided with a fifth control valve (19), which is connected with the second control valve (16), the third control valve (17), the fourth control valve (18), and the pressure introduction pipe (20) together constitute a self-cleaning process flow. 8. The filter device for monitoring and regulating valve pilot according to claim 1, characterized in that: the filter unit (1) is equipped with a differential pressure transmitter (13) capable of remote transmission of analog signals.

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