Multi-phase flow pipeline pressure balance valve group

Abstract

The invention relates to the technical field of valves, in particular to a multiphase flow pipeline pressure balance valve bank which comprises a plurality of pipelines serving as fluid flowing channels and providing transmission paths for multiphase flow media. The valve body is installed between the pipelines through a connecting flange, a space for containing components such as the valve element is formed in the valve body, and fluid flowing is controlled and adjusted; the baffle is mounted in the valve body, and a filter screen is constructed on the surface of the baffle; the pressure relief assembly is installed in the valve body, can move in the vertical direction and is used for balancing the pressure of media flowing through the pipeline. By arranging the pressure relief assembly, when the pressure in a pipeline exceeds a threshold value set at the position of a second pressure sensor, the acting force of an overpressure medium exerts a thrust effect on a floating plate and resists elastic potential energy to do work, and at the moment, a valve element can open a baffle under the guiding effect of the floating plate; therefore, the medium of the overpressure part flows into the other pipeline through the filter screen, and self-adaptive pressure relief balance treatment is achieved.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, in particular to a multiphase flow pipeline pressure balancing valve group. Background Art

[0002] A balancing valve is a valve with a special function. The valve itself has no special features, but its use and location are different. In some industries, due to the large pressure difference or flow difference between the media (various flowable substances) in various parts of the pipeline or container, in order to reduce or balance the difference, a valve is installed between the corresponding pipelines or containers to adjust the relative balance of pressure on both sides, or to achieve flow balance by diversion. This valve is called a balancing valve.

[0003] To this end, a dual-pipe balancing valve (publication number CN217559112U) has been designed. It includes a first pipe and a second pipe, with a first balancing valve and a second balancing valve disposed between them. The first balancing valve includes a fixing nut, a handle, a valve seat, a connecting pipe, and a valve core. The valve seat and connecting pipe are detachably connected. The first and second pipes are connected via the connecting pipe, and the valve core is disposed inside the valve seat and in the middle of the connecting pipe. This utility model uses two sets of balancing valves to connect the two pipes, effectively increasing the liquid flow area and ensuring pressure balance between the two pipes.

[0004] However, although it can balance and adjust the pressure of the pipeline through two sets of valves, when adjusting the pressure of the multiphase flow pipeline, there are often problems such as low adjustment accuracy, slow response speed, and poor adaptability. It is difficult to adapt to the pipeline pressure and make corresponding adjustments. Therefore, the inventor designed a balancing valve that can adapt to the pressure in the pipeline and respond quickly, which is a common goal pursued by technical personnel in this field. Summary of the Invention

[0005] In response to the deficiencies of the prior art, the present invention provides a multiphase flow pipeline pressure balancing valve group, which is a balancing valve that can adaptively adjust the pressure in the pipeline and can respond quickly, solving the problem of slow response speed of pipeline pressure regulation.

[0006] In order to achieve the above-mentioned purpose of a balancing valve capable of self-adapting to the pressure in the pipeline and being able to respond quickly, the present invention provides the following technical solutions: A multiphase flow pipeline pressure balancing valve group, comprising: A plurality of pipes, serving as channels for fluid flow, provide transmission paths for multiphase flow media; The valve body is installed between the pipes through the connecting flange, and has a space inside to accommodate the valve core and other components, which is used to control and regulate the flow of fluid; a baffle, which is installed inside the valve body, and a filter is constructed on the surface of the baffle; a pressure relief assembly, which is installed inside the valve body and can move in the vertical direction, and is used to balance the pressure of the medium flowing through the pipeline; a pressure regulating assembly, which is installed inside the valve body and is used to adjust the pressure of the valve body; The surfaces of the pipes are all equipped with docking components.

[0007] Optionally, the pressure relief assembly includes a seal installed in the valve body and movably arranged in the vertical direction, an elastic member is connected between the seal and the valve core, a connecting rod that can pass through the seal to the outside of the valve body is installed on the surface of the valve core, and a handle is installed at one end of the connecting rod.

[0008] Optionally, the pressure relief assembly further includes floating plates installed on both sides of the valve core surface for guiding the movement of the valve core.

[0009] Optionally, the floating plates are all configured to be arranged in an arc shape that is inclined upward in the direction of the valve body, and the floating plates are symmetrically distributed along the longitudinal center line of the valve core.

[0010] Optionally, the valve core is located outside the baffle, and the valve core is sealed to the valve body.

[0011] Optionally, the pressure regulating assembly includes a pressure regulating part installed on the surface of the valve body and threadedly connected to the valve body, one end of the pressure regulating part is arranged in contact with the seal, and the pressure regulating part is coaxially arranged with the connecting rod and located on the outside of the connecting rod.

[0012] Optionally, a pressure sensor 1 is installed inside the pipeline, and a pressure sensor 2 is installed inside the valve body, which is located directly below the valve core and in contact with the valve core.

[0013] Optionally, the docking assembly includes a connector 1 installed on the surface of the pipe, a connector 2 is sleeved on the outside of the connector 1, an elastic member 2 is connected between the connector 1 and the connector 2, and the interiors of the connector 1 and the connector 2 are both constructed with connecting threads.

[0014] Optionally, a sealing ring is connected to the surface of the connector 1, and the connector 2 is coaxially arranged with the connector.

[0015] Optionally, the valve core is configured to be able to move in a vertical direction and unfold the filter screen when the floating plate is subjected to the force of the medium.

[0016] Compared with the prior art, the present invention provides a multiphase flow pipeline pressure balancing valve group, which has the following beneficial effects: 1. The present invention is provided with a pressure relief assembly. When a multiphase flow medium flows in a pipeline, the first pressure sensor can monitor the pressure of the medium flowing through the pipeline in real time. When the pressure in the pipeline exceeds the threshold value set at the position of the second pressure sensor, the force of the overpressure medium will exert a thrust on the floating plate and resist the elastic potential energy to do work. At this time, the valve core can open the baffle under the guidance of the floating plate, and the valve core will compress the elastic member and push up together, so that the overpressure part of the medium will flow through the filter screen into the other pipeline. When the pressure is balanced, the valve core can close automatically, thereby performing adaptive pressure relief balancing processing, which is more convenient. 2. The present invention is provided with a pressure regulating assembly. When monitoring and adjusting the pressure within the pipeline, personnel can rotate the pressure regulating part so that the pressure regulating part can push the sealing member downward or upward during the rotation process to adjust the elastic potential energy of the elastic member 1 acting on the valve core. When a smaller balance pressure is required, the pressure regulating part can be adjusted upward to reduce the elastic potential energy. When a larger balance pressure is required, the pressure regulating part can be adjusted downward to synchronize the elastic potential energy. The adjusted elastic force will be monitored by the second pressure sensor. 3. The present invention is provided with a docking assembly. When connected to a pipeline, docking can be performed through connector 1 and connector 2 of different specifications and sizes, thereby improving the flexibility and diversity of the connection. At the same time, when the connection accuracy, that is, the length, deviates and the connection position cannot be reached, connector 2 can be pulled so that connector 2 can compress elastic part 2 to extend a certain distance to connect with the docking pipeline, thereby improving the flexibility of multiphase flow pipeline connection, facilitating operation, and improving applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the pipeline of the present invention; Figure 3 It is a schematic diagram of the first front cross-sectional structure of the present invention; Figure 4 It is a second front cross-sectional structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the pressure relief assembly of the present invention; Figure 6 This is a schematic diagram of the disassembled structure of the docking assembly of the present invention; Figure 7 For the present invention Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0018] In the figure: 1. Pipe; 2. Valve body; 3. Handle; 4. Connector 1; 5. Connector 2; 6. Valve core; 7. Pressure sensor 1; 8. Baffle; 9. Filter; 10. Pressure sensor 2; 11. Float; 12. Pressure regulating part; 13. Connecting rod; 14. Seal; 15. Elastic part 1; 16. Connecting flange; 17. Seal ring; 18. Elastic part 2; 19. Connecting thread. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: See Figure 1-7 , an embodiment of the present invention provides a technical solution: a multiphase flow pipeline pressure balancing valve group, comprising: a plurality of pipelines 1, which serve as channels for fluid flow and provide a transmission path for multiphase flow media; a valve body 2, which is installed between the pipelines 1 through a connecting flange 16, and is provided with a space for accommodating components such as a valve core 6 inside, for realizing control and regulation of fluid flow, and changing the fluid flow area by moving the valve core 6 to realize control and regulation of fluid flow. When the multiphase flow medium flows in the pipeline, the valve body 2 can accurately control the flow rate of the medium according to the system pressure and flow requirements, thereby maintaining the pressure balance in the pipeline; a baffle 8, which is installed inside the valve body 2, and a filter screen 9 is constructed on the surface of the baffle 8. The baffle 8 cooperates with the valve core 6 to form a multi-layer protective barrier to reduce leakage, and when the valve core 6 is opened, the medium flowing through the baffle 8 can be purified under the action of the filter screen 9, which can filter out solid particles and impurities in the multiphase flow medium, reducing these impurities Flow in the pipeline 1 and the valve body 2; a pressure relief assembly, which is installed inside the valve body 2 and can move in the vertical direction, and is used to balance the pressure of the medium flowing through the pipeline 1. When the pressure in the pipeline exceeds the set value, the pressure relief assembly will automatically move, open the pressure relief channel, and discharge the excess medium, thereby reducing the pressure in the pipeline to prevent safety accidents caused by excessive pressure; a pressure regulating assembly, which is installed inside the valve body 2 and is used to adjust the pressure of the valve body 2. The pressure regulating assembly can accurately adjust the pressure in the valve body 2 according to the actual needs of the system to keep it within an appropriate range. Unlike the pressure relief assembly, the pressure regulating assembly pays more attention to the fine adjustment of the pressure to meet the pressure requirements under different working conditions; docking assemblies are installed on the surface of the pipeline 1, which can conveniently connect the pipeline 1 with other equipment or pipelines. The docking assembly can improve the reliability and sealing of the pipeline connection and reduce the risk of fluid leakage.

[0021] By adopting the above embodiment, when the multiphase flow medium flows in the pipeline 1, the pressure sensor 1 7 can monitor the pressure of the medium flowing through the pipeline 1 in real time, and when the pressure in the pipeline 1 exceeds the threshold value set at the position of the pressure sensor 2 10, the force of the overpressure medium will cause a thrust to the float 11 and resist the elastic potential energy to do work. At this time, the valve core 6 can open the baffle 8 under the guidance of the float 11, and the valve core 6 will compress the elastic member 15 and push it up, so that the overpressure part of the medium will flow through the filter 9 to the other pipeline. After the pressure is balanced, the valve core 6 can open the baffle 8 under the elastic potential energy. The elastic member 15 closes automatically under the action of the elastic member 15, thereby performing adaptive pressure relief balancing, which is more convenient. When monitoring and adjusting the pressure in the pipeline 1, the personnel can rotate the pressure regulating part 12 so that the pressure regulating part 12 can push the sealing member 14 downward or upward during the rotation to adjust the elastic potential energy of the elastic member 15 acting on the valve core. When a smaller balanced pressure is required, it can be adjusted upward to reduce the elastic potential energy. When a larger balanced pressure is required, it can be adjusted downward to synchronize the elastic potential energy. The adjusted elastic force will be monitored by the pressure sensor 2 10.

[0022] like Figures 3 to 5 As shown, in this embodiment, to further demonstrate the pressure relief and balancing function of the valve body 2, the pressure relief assembly includes a seal 14 mounted vertically within the valve body 2 for movement. An elastic member 15 is connected between the seal 14 and the valve core 6. A connecting rod 13 is mounted on the surface of the valve core 6, extending through the seal 14 to the exterior of the valve body 2. A handle 3 is mounted at one end of the connecting rod 13. In this embodiment, the seal 14 ensures the sealing of the valve body 2 under normal operating conditions. In a multiphase flow pipeline system, the medium may contain gas, liquid, or even solid particles. The seal 14 prevents these media from leaking from the interior of the valve body 2 to the external environment, ensuring the safe operation of the system and protecting the surrounding environment from contamination. When the pressure within the pipeline 1 exceeds the threshold monitored by the pressure sensor 7, a person can manually pull the handle 3 upward, causing the handle 3 to pull the valve core 6 via the connecting rod 13, thereby causing the valve core 6 to open the passage and compress the elastic member 15. Manual adjustment of the valve body 2 is possible, and the work done by the person overcomes the elastic potential energy of the elastic member 15.

[0023] like Figures 3 and 4As shown, in this embodiment, the pressure relief assembly further includes floating plates 11 installed on both sides of the surface of the valve core 6 for guiding the movement of the valve core 6. Through this implementation, in the multiphase flow pipeline pressure balancing valve group, the valve core 6 needs to accurately perform linear motion in the valve body 2 to change the fluid flow area and achieve pressure regulation. The floating plates 11 are installed on both sides of the surface of the valve core 6 and can provide a guiding effect for the movement of the valve core 6. The surface of the floating plates 11 is usually designed to be relatively smooth, and a certain distance is maintained between the floating plates 11 and the inner wall of the valve body 2 to provide sufficient space for movement.

[0024] like Figures 3 and 4 As shown, in this embodiment, the float plates 11 are all constructed as an arc-shaped arrangement inclined upward in the direction of the valve body 2, and the float plates 11 are symmetrically distributed along the longitudinal center line of the valve core 6. Through this design, it is possible to guide the multiphase flow medium. When the fluid flows near the valve core 6, the arc-shaped float plates 11 can change the flow direction of the fluid so that the flowing medium can fully exert force on the float plates 11, thereby better guiding the movement of the valve core 6 through the float plates 11, improving the effect, and enabling it to pass through the valve body 2 more smoothly. No matter which pipeline 1 the medium flows from, it can act on the float plates 11 on both sides of the valve core 6.

[0025] like Figures 3 and 4 As shown, in this embodiment, the valve core 6 is located outside the baffle 8, and the valve core 6 is sealed and connected to the valve body 2. Through this design, when the medium flows in the valve body 2, it can more directly contact and be controlled by the valve core 6, so that the baffle 8 and the valve core 6 can both hinder the flow of the medium to a certain extent, gradually provide a flow channel for the medium, thereby gradually adjusting and balancing the pressure, and under the sealing action, it can effectively prevent the medium from leaking from the gap between the valve core 6 and the valve body 2, ensuring the sealing performance of the valve group, and the valve core 6 can accurately control the flow area of ​​the medium in the valve body 2. When the pressure in the pipeline needs to be adjusted, the size of the gap between the valve core 6 and the valve body 2 and the baffle 8 is changed through the movement of the valve core 6, thereby adjusting the flow of the medium and achieving precise control of the pressure.

[0026] like Figures 3 to 5As shown, in this embodiment, the pressure regulating assembly includes a pressure regulating portion 12 installed on the surface of the valve body 2 and threadedly connected to the valve body 2. One end of the pressure regulating portion 12 is arranged in contact with the sealing member 14, and the pressure regulating portion 12 is coaxially arranged with the connecting rod 13 and is located on the outside of the connecting rod 13. Through this embodiment, the pressure regulating portion 12 can adjust its position on the valve body 2 by rotation. By changing the position of the pressure regulating portion 12, the sealing member 14 can be pushed downward or upward to adjust the elastic potential energy of the elastic member 15 acting on the valve core. When a smaller balance pressure is required, it can be adjusted upward to reduce the elastic potential energy. When a larger balance pressure is required, it can be adjusted downward to synchronize the elastic potential energy. The adjusted elastic force will be monitored by the pressure sensor 2 10.

[0027] like Figures 2 to 4 As shown, in this embodiment, a pressure sensor 1 7 is installed inside the pipeline 1, and a pressure sensor 2 10 is installed inside the valve body 2, which is located directly below the valve core 6 and in contact with the valve core 6. Through this design, the pressure sensor 1 7 can measure the pressure value in the pipeline in real time and accurately. In a multiphase flow pipeline system, the flow state of the medium is complex and changeable, and the pressure will fluctuate accordingly. The pressure sensor 1 7 can continuously monitor these pressure changes and transmit the data to the control system, while the pressure sensor 2 10 can accurately measure the pressure at the valve core 6. The valve core 6 is a key component for regulating pipeline pressure. The pressure change at its location directly reflects the regulating effect of the valve group and the pressure distribution in the pipeline. Real-time pressure information is obtained to help operators understand the working status of the valve group. When the pressure in the pipeline deviates from the set value, the control system can determine the direction and amplitude of the adjustment based on these data, thereby controlling the action of the pressure regulating component (such as the pressure regulating part 12, etc.) to achieve precise regulation of the pipeline pressure.

[0028] like Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, in this embodiment, the docking assembly includes a connector 1 4 installed on the surface of the pipeline 1, a connector 2 5 is sleeved on the outside of the connector 1 4, an elastic member 2 18 is connected between the connector 1 4 and the connector 2 5, and the interiors of the connector 1 4 and the connector 2 5 are both constructed with connecting threads 19. Through this implementation, they can be connected to other pipelines or equipment by means of threaded connection. At the same time, when the connection accuracy, that is, the length, deviates and the connection position cannot be reached, the connector 2 5 can be pulled so that the elastic member 2 18 can be compressed to extend a certain distance to connect to the docking pipeline, thereby improving the flexibility of the multiphase flow pipeline connection, facilitating operation, and improving applicability.

[0029] like Figures 6 and 7As shown, in this embodiment, a sealing ring 17 is connected to the surface of the connector 1 4, and the connector 2 5 is coaxially arranged with the connector 1 4. Through this design, the sealing ring 17 has good elasticity and sealing performance, and can fill the small gap between the connectors to prevent the medium (such as gas, liquid, etc.) in the pipeline from leaking from the connection. During the operation of the pipeline, it may be affected by various external forces, such as pressure fluctuations of the medium, vibrations of the equipment, etc. The coaxial arrangement can reduce the impact of these external forces on the connector, making the connection more secure and not easy to loosen.

[0030] like Figures 3 and 4 As shown, in this embodiment, the valve core 6 is configured to be able to move in the vertical direction and expand the filter screen 9 when the floating plate 11 is subjected to the force of the medium. Through this design, when the medium flows in the pipeline, the floating plate 11 will be subjected to the force of the medium. When the impurity content in the medium increases, the flow rate changes or the pressure changes, resulting in the need for filtration, the force exerted on the floating plate 11 will trigger the valve core 6 to move in the vertical direction. The movement of the valve core 6 drives the filter screen 9 to expand and start filtering the medium. Under different working conditions, the force exerted by the medium on the floating plate 11 is different. Through the linkage design of the valve core 6 and the floating plate 11, the expansion degree of the filter screen 9 can be automatically adjusted according to the actual working conditions. For example, when the medium flow rate is large and there are more impurities, the force exerted on the floating plate 11 increases, the movement amplitude of the valve core 6 increases, the filter screen 9 is more fully expanded, the filtering effect is better, and sufficient pressure relief balance is achieved.

[0031] Working principle: When the device is in use, the valve body 2 is first connected to the pipeline 1, so that when the multiphase flow medium flows in the pipeline 1, the pressure sensor 7 can monitor the pressure of the medium flowing through the pipeline 1 in real time, and when the pressure in the pipeline 1 exceeds the threshold set at the position of the pressure sensor 10, the overpressure medium will cause a thrust to the float 11 and resist the elastic potential energy to do work. At this time, the valve core 6 can open the baffle 8 under the guidance of the float 11, and the valve core 6 will compress the elastic part 15 and lift it up, so that the medium in the overpressure part will flow through the filter 9 to the other pipeline, and when the pressure is balanced, the valve core 6 can close itself under the action of the elastic part 15, thereby performing adaptive pressure relief balancing processing, which is more convenient. When monitoring and adjusting the pressure in the pipeline 1, personnel can adjust the pressure by turning the pressure regulator Part 12, so that the pressure regulating part 12 can push the sealing part 14 downward or upward during the rotation process to adjust the elastic potential energy of the elastic part 15 acting on the valve core. When it needs to withstand a smaller balanced pressure, it can be adjusted upward to reduce the elastic potential energy. When it needs to withstand a larger balanced pressure, it can be adjusted downward to synchronize the elastic potential energy. The adjusted elastic force will be monitored by the pressure sensor 2 10. At the same time, when connected to the pipeline 1, it can be docked through connector 1 4 and connector 2 5 of different specifications and sizes to improve the flexibility and diversity of the connection. At the same time, when the connection accuracy, that is, the length, deviates and cannot reach the connection position, by pulling connector 2 5, connector 2 5 can compress elastic part 2 18 to extend a certain distance to connect to the docking pipeline, thereby improving the flexibility of multiphase flow pipeline connection, facilitating operation, and improving applicability.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multiphase flow pipeline pressure balancing valve group, characterized in that: include: A plurality of pipes (1) serve as channels for fluid flow and provide a transmission path for the multiphase flow medium; A valve body (2) is installed between the pipes (1) via a connecting flange (16), and has a space inside for accommodating components such as a valve core (6) for controlling and regulating the flow of fluid; A baffle (8) is installed inside the valve body (2), and a filter (9) is constructed on the surface of the baffle (8); A pressure relief assembly, which is installed inside the valve body (2) and is movable in a vertical direction, and is used to balance the pressure of the medium flowing through the pipeline (1); A pressure regulating assembly, which is installed inside the valve body (2) and is used to adjust the pressure of the valve body (2); The surfaces of the pipes (1) are all equipped with docking components.

2. A multiphase flow pipeline pressure balancing valve group according to claim 1, characterized in that: The pressure relief assembly includes a sealing member (14) installed in the valve body (2) and movable in the vertical direction, an elastic member (15) is connected between the sealing member (14) and the valve core (6), a connecting rod (13) capable of passing through the sealing member (14) to the outside of the valve body (2) is installed on the surface of the valve core (6), and a handle (3) is installed at one end of the connecting rod (13).

3. The multiphase flow pipeline pressure balancing valve group according to claim 2, characterized in that: The pressure relief assembly further includes floating plates (11) mounted on both sides of the surface of the valve core (6) for guiding the movement of the valve core (6).

4. The multiphase flow pipeline pressure balancing valve group according to claim 3, characterized in that: The floating plates (11) are all configured to be arranged in an arc shape that is inclined upward in the direction of the valve body (2), and the floating plates (11) are symmetrically distributed along the longitudinal center line of the valve core (6).

5. The multiphase flow pipeline pressure balancing valve group according to claim 1, characterized in that: The valve core (6) is located outside the baffle (8), and the valve core (6) is sealedly connected to the valve body (2).

6. The multiphase flow pipeline pressure balancing valve group according to claim 1, characterized in that: The pressure regulating assembly includes a pressure regulating portion (12) mounted on the surface of the valve body (2) and threadedly connected to the valve body (2), one end of the pressure regulating portion (12) is arranged in contact with the sealing member (14), and the pressure regulating portion (12) is coaxially arranged with the connecting rod (13) and located outside the connecting rod (13).

7. The multiphase flow pipeline pressure balancing valve group according to claim 1, characterized in that: A pressure sensor 1 (7) is installed inside the pipeline (1), and a pressure sensor 2 (10) is installed inside the valve body (2) and is located directly below the valve core (6) and in contact with the valve core (6).

8. The multiphase flow pipeline pressure balancing valve group according to claim 1, characterized in that: The docking assembly includes a connector 1 (4) installed on the surface of the pipe (1), a connector 2 (5) is sleeved on the outside of the connector 1 (4), an elastic member 2 (18) is connected between the connector 1 (4) and the connector 2 (5), and the insides of the connector 1 (4) and the connector 2 (5) are both constructed with connecting threads (19).

9. The multiphase flow pipeline pressure balancing valve group according to claim 8, characterized in that: The surface of the connector 1 (4) is connected with a sealing ring (17), and the connector 2 (5) is coaxially arranged with the connector 1 (4).

10. The multiphase flow pipeline pressure balancing valve group according to claim 1, characterized in that: The valve core (6) is configured to be able to move in a vertical direction and unfold the filter screen (9) when the floating plate (11) is subjected to the force of the medium.

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