Flow regulating valve and control method thereof

Abstract

The invention discloses a flow regulating valve and a control method thereof, and relates to the technical field of flow regulating valves, the flow regulating valve comprises a valve body and a controller, pressure relief assemblies are arranged at the water inlet end of the valve body, a filtering assembly is installed between the pressure relief assemblies, a driving assembly is installed above the valve body, and a valve element is installed at the bottom of the driving assembly; the pressure relief assembly is installed in the valve body, the valve element is installed in the valve body, the pressure relief assembly can relieve redundant pressure, the filtering assembly can filter particles in water, when the device is used, after water attack passes through the pressure relief assembly, the pressure relief assembly can reduce the force of the water attack, and therefore the impact force borne by the valve body and a pipeline is reduced, and the service life of the device is prolonged. When the filtering assembly is used, part of particles in water can be collected, particles passing through the valve element when the valve is closed are reduced, and particles are prevented from remaining between the valve element and the inner wall of the valve body after the valve element is completely closed.

Description

Technical Field

[0001] The invention relates to the technical field of flow control valves, in particular to a flow control valve and a control method thereof. Background Art

[0002] As the most commonly used control valve in the ship's seawater system, the flow control valve is mainly used to adjust the flow parameters of the seawater system. When the flow control valve is working, there are complex flow phenomena such as turbulence, separation, cavitation, etc. in the flow channel, which leads to strong pipeline vibration and vortex noise. At the same time, whether it is a flow control valve or a regional valve, when the valve is blocked, the water flow rate will suddenly change, causing water hammer. When the impact is large, it will cause the pipeline connected to the valve body to be impacted, and even worse, it will cause the pipeline to rupture, which will affect the use of the valve. Summary of the invention

[0003] The object of the present invention is to provide a flow control valve and a control method thereof to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flow regulating valve, comprising a valve body and a controller, a pressure relief assembly is provided at the water inlet end of the valve body, a filter assembly is installed between the pressure relief assemblies, a drive assembly is installed above the valve body, a valve core is installed at the bottom of the drive assembly, the valve core is installed inside the valve body, the pressure relief assembly can relieve excess pressure, and the filter assembly can filter particles in the water.

[0005] Furthermore, a valve cover is installed above the valve body, the valve core is located between the valve body and the valve cover, the drive assembly includes a cylinder, a valve stem is installed at the output end of the cylinder, the other end of the valve stem is connected to the valve core, and a sealing gasket is arranged between the valve body and the valve cover.

[0006] Furthermore, the pressure relief assembly includes multiple groups of support plates, and the multiple groups of support plates are equidistantly installed inside the water inlet end of the valve body, and pressure relief pipes are installed between the multiple groups of support plates. An annular airbag and an extrusion rod are installed inside the pressure relief pipe. An extrusion sleeve is installed at one end of the pressure relief pipe close to the water inlet, an extrusion rod is installed inside the extrusion sleeve, and a movable cylinder is installed outside the extrusion sleeve. The movable cylinder can move back and forth on the extrusion sleeve, and a blocking plate is installed at the other end of the movable cylinder. The side of the blocking plate that is subjected to impact force is arc-shaped, and multiple groups of holes are provided on the side of the annular airbag away from the extrusion rod.

[0007] Furthermore, a pressure relief arc plate is installed at the other end of the pressure relief pipe, and a plurality of groups of air relief holes are arranged on the pressure relief arc plate. A limiting column is installed at the other end of the pressure relief arc plate, and a limiting sleeve is sleeved on the limiting column. A force unloading arc plate is installed at the other end of the limiting sleeve, and a plurality of groups of air relief holes are also arranged on the force unloading arc plate. The diameter of the air relief holes on the force unloading arc plate is larger than that of the air relief holes on the pressure relief arc plate.

[0008] Furthermore, when the valve is closed: the water hammer generated by the fluid will impact the unloading arc plate, enter the annular air bag through the air holes on the unloading arc plate and the pressure relief arc plate, and the excess force will flow back to act on the unloading arc plate; When the valve is opened: the impact force of the water flow can push the blocking plate, the blocking plate pushes the squeezing rod, the squeezing rod pushes the annular airbag, squeezing the air and liquid in the annular airbag.

[0009] Furthermore, the filter assembly includes a limit rod, which is installed between two groups of support plates parallel to each other. A filter ring is installed on the limit rod, and the filter ring is installed on the limit rod through a bearing. Multiple groups of filter frames are installed on the filter ring, and the multiple groups of filter frames are equidistantly installed on the filter ring. Filter membranes are installed between the filter frames.

[0010] Furthermore, an exhaust pipe is installed above the water inlet end of the valve body, and the air at the water inlet end of the valve body can enter the exhaust pipe. A rubber block is installed inside the exhaust pipe, and a water stop hole is opened in the middle of the rubber block. The diameter of the water stop hole close to one end of the valve is larger than the diameter of the other end, and the diameter of the water stop hole close to one end of the valve gradually decreases to the other end.

[0011] Furthermore, the controller is installed on the side of the valve body, and a control panel is provided on the controller, and the control panel is connected to the controller.

[0012] A control method for a flow control valve, S1, assembling a valve body; S2. Start or stop the drive component through the controller.

[0013] Further, the S2 includes S21, the driving component drives the valve core to open the valve, the water flows into the valve body from the water inlet end of the valve body, passes through the pressure relief component and the filter component, and then is discharged from the water outlet end of the valve body; S22. When the valve core closes the valve body, the generated water hammer passes through the pressure relief component, which can unload the force of the water hammer and reduce the impact on the pipeline.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When the device is in use, after the water hammer passes through the pressure relief component, the pressure relief component can reduce the force of the water hammer, thereby reducing the impact force on the valve body and the pipeline. When the filter component is in use, it can collect part of the particles in the water, reduce the particles passing through the valve core when the valve is closed, and prevent particles from remaining between the valve core and the inner wall of the valve body after the valve core is completely closed; 2. When the pressure relief assembly is used, water hammer will first impact the valve core, and then impact the unloading arc plate. The unloading arc plate will weaken the force of the water hammer to a certain extent, reducing the liquid entering the pressure relief pipe. Then a small amount of gas and liquid will enter the pressure relief pipe to inflate the annular airbag. After the inflation is completed, the annular airbag will expand and push open the extrusion rod and the blocking plate. When a gap is formed between the blocking plate and the pressure relief pipe, the subsequent liquid flow rate will be reduced, so that the subsequent reciprocating water hammer will also be alleviated. When the valve continues to be opened, the subsequent incoming water flow will continue to impact the blocking plate. At this time, the blocking plate will squeeze the extrusion rod and then squeeze the annular airbag, so that the liquid and gas in the annular airbag are discharged; 3. When in use, the filter component of the device can collect part of the particles in the water, reduce the particles passing through the valve core when the valve is closed, and prevent particles from remaining between the valve core and the inner wall of the valve body after the valve core is completely closed. When in use, the water flow impacts the filter frame on the filter component, and because filter films are arranged between the filter frames, the impact force of the water flow can also drive multiple groups of filter frames to rotate. When the filter component is rotating, the particles in the water can be filtered more deeply. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the axonometric structure of the present invention as a whole; Figure 2 It is a schematic diagram of the structure of the present invention in cross section; Figure 3 It is a schematic diagram of the local structure of the input end of the valve body of the present invention; Figure 4 This is a structural schematic diagram of the water inlet direction of the valve body of the present invention; Figure 5 It is a structural schematic diagram of the pressure relief assembly of the present invention; Figure 6 For the present invention Figure 3 An enlarged schematic diagram of the area "A" in the figure; Figure 7 For the present invention Figure 5 Enlarged schematic diagram of point "B" in the figure.

[0016] In the figure: 1. valve body; 11. valve core; 12. valve cover; 2. pressure relief assembly; 21. support plate; 22. pressure relief pipe; 23. annular airbag; 24. extrusion rod; 25. blocking plate; 26. pressure relief arc plate; 27. unloading arc plate; 3. filter assembly; 31. limit rod; 32. filter ring; 33. filter frame; 4. drive assembly; 41. cylinder; 42. valve stem; 5. exhaust pipe; 51. rubber block; 6. controller. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0018] Example: Figure 1-Figure 7 As shown, the present invention provides a flow control valve and a control method thereof, comprising a valve body 1 and a controller 6, wherein a pressure relief component 2 is provided at the water inlet end of the valve body 1, a filter component 3 is installed between the pressure relief components 2, a drive component 4 is installed above the valve body 1, a valve core 11 is installed at the bottom of the drive component 4, and the valve core 11 is installed inside the valve body 1, the pressure relief component 2 can remove excess pressure, and the filter component 3 can filter particles in the water; When the device is in use, it is first necessary to connect the input end and the output end of the valve body 1. In subsequent use, the staff can only operate the driving component 4 through the controller 6 to control the opening and closing of the valve body 1. When the valve body 1 is in an open state, water flows from the input end into the valve body 1. During this period, the water flows through the pressure relief component 2 and the filter component 3. Because the pressure relief component 2 is located at the input end of the valve body 1 and is provided with an arc-shaped blocking plate 25, the flow rate of the water will not be greatly affected when the water flows through the pressure relief component 2. However, when the water flows through the filter component 3, the filter component 3 can collect part of the particles in the water, reduce the particles passing through the valve core 11 when the valve is closed, and prevent particles from remaining between the valve core 11 and the inner wall of the valve body 1 after the valve core 11 is completely closed. When the valve body 1 is closed, because the water The flow rate suddenly changes, thereby causing water hammer. After the water hammer passes through the pressure relief component 2, the pressure relief component 2 can reduce the force of the water hammer, thereby reducing the impact force on the valve body 1 and the pipeline. When the pressure relief component 2 is used, the water hammer will first impact the valve core 11, and the water hammer rebounds back through the unloading arc plate 27, and then passes through the pressure relief arc plate 26 to allow the annular air bag 23 inside the pressure relief pipe 22 to collect excess gas and liquid, and at the same time, the extrusion rod 24 and the blocking plate 25 will be pushed open. When a gap is generated between the blocking plate 25 and the pressure relief pipe 22, the subsequent liquid flow rate will be reduced, thereby the subsequent reciprocating water hammer will also be alleviated, and the remaining air in the pipeline will be discharged along the exhaust pipe 5. Therefore, when the device is in use, it can effectively alleviate the impact force of the water hammer, thereby increasing the service life of the valve body 1 to a certain extent.

[0019] like Figure 1-Figure 2 As shown, in this embodiment, specifically, a valve cover 12 is installed above the valve body 1, the valve core 11 is located between the valve body 1 and the valve cover 12, the driving assembly 4 includes a cylinder 41, a valve stem 42 is installed at the output end of the cylinder 41, the other end of the valve stem 42 is connected to the valve core 11, and a sealing gasket is provided between the valve body 1 and the valve cover 12; Therefore, when the valve body 1 is in use, it can be driven by the driving assembly 4. During specific use, the controller 6 can control the opening and closing of the cylinder 41. After the cylinder 41 is started, it can drive the valve stem 42, so that the valve stem 42 drives the valve core 11 to move upward or downward, thereby realizing the opening or closing of the regulating valve.

[0020] like Figure 2-Figure 5As shown, in this embodiment, specifically, the pressure relief assembly 2 includes a plurality of groups of support plates 21, and the plurality of groups of support plates 21 are equidistantly installed inside the water inlet end of the valve body 1, and a pressure relief pipe 22 is installed between the plurality of groups of support plates 21, and an annular air bag 23 and an extrusion rod 24 are installed inside the pressure relief pipe 22, and an extrusion sleeve is installed at one end of the pressure relief pipe 22 close to the water inlet, and an extrusion rod 24 is installed inside the extrusion sleeve, and a movable cylinder is installed outside the extrusion sleeve, and the movable cylinder can reciprocate on the extrusion sleeve, and a blocking plate 25 is installed at the other end of the movable cylinder, and the side of the blocking plate 25 subjected to impact force is arc-shaped, and the side of the annular air bag 23 away from the extrusion rod 24 is provided with a plurality of groups of holes; Because the pressure relief component 2 is provided with an arc-shaped blocking plate 25 at the input end of the valve body 1, the flow rate of the water flow will not be greatly affected when the water flows through the pressure relief component 2. After the water hammer passes through the pressure relief component 2, the force of the water hammer can be reduced by the pressure relief component 2, thereby reducing the impact force on the valve body 1 and the pipeline. When the pressure relief component 2 is used, the water hammer will first impact the valve core 11, and the water hammer will rebound and pass through the unloading arc plate 27, and then pass through the pressure relief arc plate 26 to make the annular air bag 23 inside the pressure relief pipe 22 collect excess gas and liquid, and at the same time, the extrusion rod 24 and the blocking plate 25 will be pushed open. When a gap is generated between the blocking plate 25 and the pressure relief pipe 22, the flow rate of the subsequent liquid entering will be reduced, thereby the subsequent reciprocating water hammer will also be alleviated. When the valve is continued to be opened, the subsequent water flow will continue to impact the blocking plate 25. At this time, the blocking plate 25 will squeeze the extrusion rod 24 and then squeeze the annular air bag 23, so that the liquid and gas in the annular air bag 23 are discharged.

[0021] like Figure 3-Figure 5 As shown, in this embodiment, specifically, a pressure relief arc plate 26 is installed at the other end of the pressure relief pipe 22, and a plurality of groups of air leakage holes are arranged on the pressure relief arc plate 26. A limiting column is installed at the other end of the pressure relief arc plate 26, and a limiting sleeve is sleeved on the limiting column. A force relief arc plate 27 is installed at the other end of the limiting sleeve, and a plurality of groups of air leakage holes are also arranged on the force relief arc plate 27. The diameter of the air leakage holes on the force relief arc plate 27 is larger than that on the pressure relief arc plate 26. The other end of the pressure relief pipe 22 of the device plays the main role in pressure relief. When in use, the water hammer will first impact the unloading arc plate 27, and the unloading arc plate 27 will weaken the force of the water hammer to a certain extent. Moreover, because the diameter of the air leakage hole on the unloading arc plate 27 is larger than the diameter of the air leakage hole on the pressure relief arc plate 26, the gas and liquid remaining in the water hammer will pass through the air leakage hole to reduce the liquid, thereby reducing the liquid entering the pressure relief pipe 22. After that, a small amount of gas and liquid will enter the pressure relief pipe 22, thereby inflating the annular airbag 23. After the inflation is completed, the annular airbag 23 will expand, and then extend the extrusion rod 24 and the blocking plate 25. When a gap is generated between the blocking plate 25 and the pressure relief pipe 22, the flow rate of the subsequent liquid entering will be reduced, thereby the subsequent reciprocating water hammer will also be alleviated.

[0022] like Figure 3-Figure 5 As shown, in this embodiment, specifically, when the valve is closed: the water hammer generated by the fluid will impact the unloading arc plate 27, enter the annular airbag 23 through the air leakage holes on the unloading arc plate 27 and the pressure relief arc plate 26, and the excess force will flow back to act on the unloading arc plate 27; When the valve is opened: the impact force of the water flow can push the blocking plate 25, the blocking plate 25 pushes the squeezing rod 24, the squeezing rod 24 pushes the annular airbag 23, squeezing the air and liquid in the annular airbag 23; Therefore, when the annular airbag 23 of the device is in use, when water hammer impacts the pressure relief component 2, the annular airbag 23 will absorb part of the force of the water hammer, thereby reducing the impact of the water hammer on the valve body 1 and the pipeline. When the valve continues to be opened, the subsequent incoming water flow will continue to impact the blocking plate 25. At this time, the blocking plate 25 will squeeze the squeezing rod 24 and then squeeze the annular airbag 23, so that the liquid and gas in the annular airbag 23 are discharged.

[0023] like Figure 4-Figure 5 and Figure 7 As shown, in this embodiment, specifically, the filter assembly 3 includes a limit rod 31, the limit rod 31 is installed between two groups of support plates 21 parallel to each other, a filter ring 32 is installed on the limit rod 31, the filter ring 32 is installed on the limit rod 31 through a bearing, a plurality of filter frames 33 are installed on the filter ring 32, and the plurality of filter frames 33 are equidistantly installed on the filter ring 32, and filter films are installed between the filter frames 33; When in use, the filter component 3 of the device can collect some of the particles in the water, reduce the particles passing through the valve core 11 when the valve is closed, and prevent particles from remaining between the valve core 11 and the inner wall of the valve body 1 after the valve core 11 is completely closed. When in use, the water flow impacts the filter frame 33 on the filter component 3, and because filter films are provided between the filter frames 33, the impact force of the water flow can also drive the multiple groups of filter frames 33 to rotate. When the filter component 3 is rotating, the particles in the water can be filtered more deeply.

[0024] like Figure 6 As shown, in this embodiment, specifically, an exhaust pipe 5 is installed above the water inlet end of the valve body 1, and the air at the water inlet end of the valve body 1 can enter the exhaust pipe 5. A rubber block 51 is installed inside the exhaust pipe 5, and a water stop hole is opened in the middle of the rubber block 51. The diameter of the water stop hole near one end of the valve is larger than the diameter of the other end, and the diameter of the water stop hole near one end of the valve gradually decreases to the other end; When the valve body 1 is in use, the remaining air in the pipeline will be discharged along the exhaust pipe 5. When the exhaust pipe 5 is in actual use, the excess air in the valve body 1 will enter the exhaust pipe 5 along the holes. Since the rubber block 51 is provided inside the exhaust pipe 5, a certain amount of liquid can be blocked, so that the gas can be discharged along the water stop hole. Since the diameter of the water stop hole gradually decreases, the liquid can be blocked more effectively.

[0025] like Figure 1 As shown, in this embodiment, specifically, the controller 6 is installed on the side of the valve body 1, and a control panel is provided on the controller 6, and the control panel is connected to the controller 6; When in use, the staff can remotely control the valve body 1 through the controller 6, and can also control the valve body 1 at close range through the control panel.

[0026] like Figure 1-Figure 7 As shown, in this embodiment, specifically, S1, assembling the valve body; S2. Start or stop the drive component through the controller.

[0027] like Figure 1-Figure 7 As shown, in this embodiment, specifically, S2 includes S21, the driving component drives the valve core to open the valve, and the water flows into the valve body from the water inlet end of the valve body, passes through the pressure relief component and the filter component, and then is discharged from the water outlet end of the valve body; S22. When the valve core closes the valve body, the generated water hammer passes through the pressure relief component, which can unload the force of the water hammer and reduce the impact on the pipeline.

[0028] Working principle: When the device is in use, it is first necessary to connect the input end and the output end of the valve body 1. In subsequent use, the staff can only control the driving component 4 through the controller 6 to control the opening and closing of the valve body 1. When the valve body 1 is in an open state, water flows from the input end into the valve body 1. During this period, the water flows through the pressure relief component 2 and the filter component 3. Because the pressure relief component 2 is located at the input end of the valve body 1 and is provided with an arc-shaped blocking plate 25, the flow rate of the water will not be greatly affected when the water flows through the pressure relief component 2. However, when the water flows through the filter component 3, the filter component 3 can collect part of the particles in the water, reduce the particles passing through the valve core 11 when the valve is closed, and prevent the valve core 11 from being completely closed. After the valve body 1 is closed, there are particles remaining between the valve core 11 and the inner wall of the valve body 1. When the valve body 1 is closed, Because the flow rate of water changes suddenly, water hammer is caused. After the water hammer passes through the pressure relief component 2, the pressure relief component 2 can reduce the force of the water hammer, thereby reducing the impact force on the valve body 1 and the pipeline. When the pressure relief component 2 is used, the water hammer will first impact the valve core 11, and the water hammer rebounds back through the unloading arc plate 27, and then passes through the pressure relief arc plate 26 to allow the annular air bag 23 inside the pressure relief pipe 22 to collect excess gas and liquid, and at the same time, the extrusion rod 24 and the blocking plate 25 are pushed open. When a gap is generated between the blocking plate 25 and the pressure relief pipe 22, the subsequent liquid flow rate will be reduced, so that the subsequent reciprocating water hammer will also be alleviated, and the remaining air in the pipeline will be discharged along the exhaust pipe 5. Therefore, when the device is in use, it can effectively alleviate the impact force of the water hammer, thereby increasing the service life of the valve body 1 to a certain extent.

[0029] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A flow control valve, comprising a valve body (1) and a controller (6), characterized in that: The water inlet end of the valve body (1) is provided with a pressure relief component (2), a filter component (3) is installed between the pressure relief components (2), a drive component (4) is installed above the valve body (1), a valve core (11) is installed at the bottom of the drive component (4), and the valve core (11) is installed inside the valve body (1), the pressure relief component (2) can relieve excess pressure, and the filter component (3) can filter particles in the water; The pressure relief assembly (2) comprises a plurality of groups of support plates (21), the plurality of groups of support plates (21) being equidistantly installed inside the water inlet end of the valve body (1), a pressure relief pipe (22) being installed between the plurality of groups of support plates (21), an annular air bag (23) and an extrusion rod (24) being installed inside the pressure relief pipe (22), an extrusion sleeve being installed at one end of the pressure relief pipe (22) close to the water inlet, an extrusion rod (24) being installed inside the extrusion sleeve, a movable cylinder being installed outside the extrusion sleeve, the movable cylinder being able to reciprocate on the extrusion sleeve, a blocking plate (25) being installed at the other end of the movable cylinder, the side of the blocking plate (25) receiving impact force being arc-shaped, and a side of the annular air bag (23) away from the extrusion rod (24) being provided with a plurality of groups of holes; A pressure relief arc plate (26) is installed at the other end of the pressure relief pipe (22), and a plurality of groups of air leakage holes are arranged on the pressure relief arc plate (26). A limiting column is installed at the other end of the pressure relief arc plate (26), and a limiting sleeve is sleeved on the limiting column. A force unloading arc plate (27) is installed at the other end of the limiting sleeve, and a plurality of groups of air leakage holes are also arranged on the force unloading arc plate (27). The diameter of the air leakage holes on the force unloading arc plate (27) is larger than that on the pressure relief arc plate (26).

2. A flow control valve according to claim 1, characterized in that: A valve cover (12) is installed above the valve body (1), the valve core (11) is located between the valve body (1) and the valve cover (12), the drive assembly (4) comprises a cylinder (41), a valve stem (42) is installed at the output end of the cylinder (41), the other end of the valve stem (42) is connected to the valve core (11), and a sealing gasket is provided between the valve body (1) and the valve cover (12).

3. A flow control valve according to claim 2, characterized in that: When the valve is closed, the water hammer generated by the fluid will impact the unloading arc plate (27), and enter the annular air bag (23) through the air holes on the unloading arc plate (27) and the pressure relief arc plate (26). The excess force will flow back and act on the unloading arc plate (27). When the valve is opened, the impact force of the water flow can push the blocking plate (25), the blocking plate (25) pushes the squeezing rod (24), the squeezing rod (24) pushes the annular airbag (23), and squeezes the air and liquid in the annular airbag (23).

4. A flow control valve according to claim 3, characterized in that: The filter assembly (3) comprises a limit rod (31), the limit rod (31) being mounted between two groups of mutually parallel support plates (21), a filter ring (32) being mounted on the limit rod (31), the filter ring (32) being mounted on the limit rod (31) via a bearing, a plurality of groups of filter frames (33) being mounted on the filter ring (32), the plurality of groups of filter frames (33) being equidistantly mounted on the filter ring (32), and filter films being mounted between the filter frames (33).

5. A flow control valve according to claim 4, characterized in that: An exhaust pipe (5) is installed above the water inlet end of the valve body (1), and air at the water inlet end of the valve body (1) can enter the exhaust pipe (5). A rubber block (51) is installed inside the exhaust pipe (5), and a water stop hole is opened in the middle of the rubber block (51). The diameter of the water stop hole near one end of the valve is larger than the diameter of the other end, and the diameter of the water stop hole near one end of the valve gradually decreases to the other end.

6. A flow control valve according to claim 5, characterized in that: The controller (6) is installed on the side of the valve body (1), and a control panel is provided on the controller (6), and the control panel is connected to the controller (6).

7. A method for controlling a flow control valve according to claim 6, characterized in that: S1. Assemble the valve body; S2. Start or stop the drive component through the controller.

8. A control method for a flow control valve according to claim 7, characterized in that: The S2 includes S21, a driving component drives the valve core to open the valve, and water flows into the valve body from the water inlet end of the valve body, passes through the pressure relief component and the filter component, and then is discharged from the water outlet end of the valve body; S22. When the valve core closes the valve body, the generated water hammer passes through the pressure relief component, which can unload the force of the water hammer and reduce the impact on the pipeline.

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