A washing water circulation balancing device based on multi-channel valve control

Abstract

The present invention discloses a washing water circulation balancing device based on multi-channel valve control, which relates to the field of valve control technology; specifically, it includes a circulating water storage unit and multiple target water pools, the outlet of the circulating water storage unit is connected to a diverter valve group, each outlet of the diverter valve group is connected to a three-way valve, and the other two outlets of the three-way valve are respectively connected to the inlet of the target water pool and connected to the inlet of the target water pool through a venturi tube, and the diverter valve group includes an outer shell and a plurality of opening valve assemblies arranged in the outer shell. Based on the multi-channel design, the present invention optimizes the drive of the diverter valve group, utilizes the linearly moving electric turntable and the magnetic coupling characteristics of the magnetic transmission disk 1 and the magnetic transmission disk 2, so that different positions of the electric turntable can be simply used to drive the opening and closing adjustment of different opening valve assemblies, thereby reducing the number of "actuators" used, thereby achieving high integration while also reducing production and use costs.

Description

Technical Field

[0001] The present invention relates to the technical field of valve control, and in particular to a washing water circulation balancing device based on multi-channel valve control. Background Art

[0002] As a core process in industrial production, the water washing system mainly achieves material purification through the principles of hydraulic classification and medium separation. It is used in the fields of coal washing, metal ore sorting and chemical raw material processing.

[0003] Since in the washing water cycle, the circulating water supply unit is designed as one, while the target water pools are designed as multiple ones, it is necessary to introduce a multi-way control valve for control.

[0004] In the prior art, for multi-way control valves, each valve opening adjustment requires an independent actuator to control, which means that when there are more channels, more actuators are required, and the volume and cost of the entire valve are higher.

[0005] To this end, the present invention proposes a washing water circulation balancing device based on multi-channel valve control. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a washing water circulation balancing device based on multi-channel valve control.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A washing water circulation balancing device based on multi-channel valve control includes a circulating water storage unit and multiple target water pools. The outlet of the circulating water storage unit is connected to a diverter valve group. Each outlet of the diverter valve group is connected to a three-way valve. The other two outlets of the three-way valve are respectively connected to the inlet of the target water pool and connected to the inlet of the target water pool through a venturi tube. The diverter valve group includes an outer shell and multiple opening valve assemblies arranged in the outer shell. The outer wall of one side of the outer shell is provided with a comprehensive actuator for driving the multiple opening valve assemblies.

[0009] The opening valve assembly includes a valve housing and a valve core rotatably connected to the interior of the valve housing through a valve stem assembly;

[0010] The comprehensive actuator includes a plurality of coupling assemblies arranged on the outer wall of the valve housing, an electric turntable, and a magnetic transmission plate fixed to the bottom of the electric turntable. The outer side of the outer shell is driven by a linear drive assembly and is equipped with a bracket, which is fixed to the outer wall of the outer shell by bolts.

[0011] The coupling assembly includes a magnetic shielding shell fixed to the outer wall of the valve shell and a magnetic transmission disk 2 fixed to the end of the valve stem assembly and cooperating with the magnetic transmission disk 1. When the magnetic transmission disk 1 is located above the magnetic transmission disk 2, the electric turntable and the magnetic transmission disk 1 form a magnetic coupler.

[0012] Preferably, a plurality of guide plates are fixed to the inner wall of the outer shell.

[0013] Furthermore: the water inlet side of the outer shell is connected with an inlet flange, the water inlet side of the valve shell is connected to the inner cavity of the outer shell, and the water outlet side of the valve shell is fixed with a water outlet flange.

[0014] Based on the above solution: a coil is fixed on the inner wall of the magnetic shielding shell at the second position of the magnetic transmission disk, two ends of the coil are connected to a voltmeter, and the voltmeter has a built-in timing unit.

[0015] A better solution among the above solutions is that: the inner wall of the bracket located above each magnetic transmission disk 2 is fixedly embedded with a push-to-close signal switch, and the top of the electric turntable is fixed with an inclined limit block that cooperates with the push-to-close signal switch.

[0016] As a further solution of the present invention: the linear drive assembly includes a motor, a screw and a guide rod, the guide rod is fixed to the inner side of the bracket, and the electric turntable is slidingly connected to the outer wall of the guide rod, the screw is rotatably connected to the inner wall of the bracket, and the screw is connected to the inner wall of the electric turntable through a thread.

[0017] At the same time, the motor is fixed to the side wall of the bracket through bolts, and the output shaft of the motor is connected to the end of the screw rod through a coupling.

[0018] As a preferred embodiment of the present invention, the valve stem assembly consists of an outer rod and an inner rod rotatably connected to each other, the outer rod is rotatably connected to the inner wall of the valve housing and the bottom of the outer rod is fixed to the outer wall of the valve core.

[0019] At the same time, the radial inner wall of the outer rod is slidably connected with a plurality of blocks, the inner side walls of the blocks are connected to the inner wall of the outer rod through springs, and the inner wall of the circular area of ​​the valve housing located at the blocks is provided with a slot that cooperates with the blocks.

[0020] As a more preferred solution of the present invention: a connecting rope is fixed to the outer wall of the inner rod, and the other end of the connecting rope is fixedly connected to the side wall of the clamping block.

[0021] The beneficial effects of the present invention are:

[0022] 1. Based on a multi-channel design, the present invention optimizes the drive of the diverter valve group and utilizes the linearly movable electric turntable and the magnetic coupling characteristics of the magnetic transmission disk 1 and the magnetic transmission disk 2. Therefore, the opening and closing adjustment of the valve assembly with different openings can be simply driven by the different positions of the electric turntable, thereby reducing the number of "actuators" used, thereby achieving high integration and reducing production and use costs.

[0023] 2. The present invention provides guide plates and utilizes multiple guide plates to form multiple guide channels, thereby performing inclined diversion and diversion when the water flows into the inlet flange, preventing kinetic energy loss due to collision and reducing energy consumption of the entire device.

[0024] 3. The present invention, by providing a coil, a voltmeter, and a timing unit, combined with the law of electromagnetic induction, can achieve accurate sensing of the rotation angle of the magnetic transmission disk 2, thereby accurately controlling the opening position of each opening valve assembly. In addition, by providing a magnetic shielding shell, it can achieve magnetic shielding, which can prevent magnetic interference caused by the rotation of adjacent magnetic transmission disks 2, thereby increasing accuracy.

[0025] 4. The present invention provides a push-to-close signal switch and an inclined limit block. When the electric turntable moves to the magnetic coupling position between the magnetic transmission disk 1 and the card slot, the inclined limit block on the top of the electric turntable will press the push-to-close signal switch at the corresponding position. The push-to-close signal switch is closed to generate an electrical signal to determine the movement to the specified position, thereby ensuring the coupling accuracy between the magnetic transmission disk 1 and the magnetic transmission disk 2.

[0026] 5. The present invention, through targeted design of the valve stem assembly, can ensure the position locking of the valve core in the non-adjustment state, thereby ensuring the stability of the flow ratio of each branch. At the same time, the locking and unlocking of the valve core can be achieved by whether the inner rod is driven, without the need for additional drive, further increasing the integration of the entire diverter valve group. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the piping structure of a washing water circulation balancing device based on multi-channel valve control proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of a diverter valve group of a washing water circulation balancing device based on multi-channel valve control proposed by the present invention;

[0029] Figure 3 This is a structural schematic diagram of an opening valve assembly of a washing water circulation balancing device based on multi-channel valve control proposed by the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the comprehensive execution part of a washing water circulation balancing device based on multi-channel valve control proposed by the present invention;

[0031] Figure 5 This is a partial front view structural diagram of a comprehensive execution unit of a washing water circulation balancing device based on multi-channel valve control proposed by the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of a linear drive component of a washing water circulation balancing device based on multi-channel valve control proposed by the present invention;

[0033] Figure 7 This is a schematic structural diagram of a valve stem assembly of a washing water circulation balancing device based on multi-channel valve control proposed by the present invention.

[0034] In the figure: 1. Circulating water storage unit; 2. Diverter valve group; 3. Three-way valve; 4. Venturi tube; 5. Target water tank; 6. Inlet flange; 7. Outer shell; 8. Guide plate; 9. Comprehensive actuator; 10. Opening valve assembly; 11. Valve core; 12. Valve stem assembly; 13. Valve shell; 14. Outlet flange; 15. Linear drive assembly; 16. Bracket; 17. Electric turntable; 18. Magnetic transmission disk 1; 19. Coupling assembly; 20. Connecting rope; 21. Magnetic shielding shell; 22. Coil; 23. Spring; 24. Block; 25. Press-to-close signal switch; 26. Inclined limit block; 27. Magnetic transmission disk 2; 28. Slot; 29. ​​Motor; 30. Screw; 31. Guide rod; 32. Outer rod; 33. Inner rod. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] Example 1: A washing water circulation balancing device based on multi-channel valve control, such as Figure 1-Figure 7 As shown, it includes a circulating water storage unit 1 and multiple target water pools 5. The outlet of the circulating water storage unit 1 is connected to a diverter valve group 2, each outlet of the diverter valve group 2 is connected to a three-way valve 3, and the other two outlets of the three-way valve 3 are respectively connected to the inlet of the target water pool 5 and connected to the inlet of the target water pool 5 through a venturi tube 4.

[0038] The diverter valve assembly 2 includes an outer shell 7 and a plurality of opening valve assemblies 10 disposed in the outer shell 7 , and a comprehensive actuator 9 for driving the plurality of opening valve assemblies 10 is disposed on one outer wall of the outer shell 7 .

[0039] The opening valve assembly 10 includes a valve housing 13 and a valve core 11 rotatably connected to the interior of the valve housing 13 via a valve stem assembly 12 .

[0040] The comprehensive execution part 9 includes a plurality of coupling assemblies 19 arranged on the outer wall of the valve housing 13, an electric turntable 17 and a magnetic transmission disk 18 fixed to the bottom of the electric turntable 17. The outer side of the outer shell 7 is driven by a linear drive assembly 15 and is equipped with a bracket 16, and the bracket 16 is fixed to the outer wall of the outer shell 7 by bolts.

[0041] The coupling assembly 19 includes a magnetic shielding shell 21 fixed to the outer wall of the valve shell 13 and a magnetic transmission disk 2 27 fixed to the end of the valve stem assembly 12 and cooperating with the magnetic transmission disk 1 18. When the magnetic transmission disk 1 18 is located above the magnetic transmission disk 2 27, the electric turntable 17 and the magnetic transmission disk 1 18 form a magnetic coupler.

[0042] When the device is in use, the circulating water of the circulating water storage unit 1 is diverted by the diverter valve group 2 and then enters each three-way valve 3. Part of the water source entering the three-way valve 3 is directly transported to the target water pool 5, and the other part is transported to the target water pool 5 after being depressurized through the venturi tube 4. At the same time, for the opening and closing and opening control of different branches of the diverter valve group 2, the linear drive component 15 can drive the electric turntable 17 to move linearly to the top of the corresponding valve shell 13. At this time, the magnetic transmission disk 18 and the magnetic transmission disk 2 27 are coupled by magnetic force. When the electric turntable 17 drives the magnetic transmission disk 18 to rotate, it can drive the magnetic transmission disk 2 27 to rotate, so that the valve stem assembly 12 drives the valve core 11 to rotate, so that the flow channel overlap between the valve core 11 and the valve shell 13 changes, thereby changing the flow ratio of the branch.

[0043] This device, based on a multi-channel design, optimizes the drive of the diverter valve group 2 and utilizes the linearly moving electric turntable 17 and the magnetic coupling characteristics of the magnetic transmission disk 1 18 and the magnetic transmission disk 2 27. It can simply use the different positions of the electric turntable 17 to drive the opening and closing adjustment of different opening valve assemblies 10, reducing the number of "actuators" used, thereby increasing the integration level and reducing the production and use costs.

[0044] In order to solve the problem of energy waste; Figure 2 、 3 As shown, the water inlet side of the outer shell 7 is connected to the inlet flange 6, the water inlet side of the valve shell 13 is connected to the inner cavity of the outer shell 7, the water outlet side of the valve shell 13 is fixed with a water outlet flange 14, and the inner wall of the outer shell 7 is fixed with multiple guide plates 8.

[0045] Since the water inlet direction of the inlet flange 6 is along the axial direction of the inlet flange 6, when diverting, the water flow will directly impact the middle opening valve assembly 10 for reversing. In this process, a large amount of kinetic energy will be lost, thereby increasing energy consumption. Based on this, the device sets a guide plate 8 and uses multiple guide plates 8 to form multiple diversion channels, so that the water flow is diverted and diverted at an angle when entering the inlet flange 6, thereby preventing kinetic energy loss caused by collision and reducing the energy consumption of the entire device.

[0046] In order to solve the position sensing problem; such as Figure 5 As shown, a coil 22 is fixed to the inner wall of the magnetic shielding shell 21 at the second magnetic transmission disk 27 , and a voltmeter is connected to both ends of the coil 22 , and the voltmeter has a built-in timing unit.

[0047] Since the magnetic transmission disk 2 27 is magnetic, when it rotates, an induced electromotive force will be generated in the coil 22 according to electromagnetic induction, and the faster the rotation speed, the greater the electromotive force. The voltmeter can detect the magnitude of the electromotive force to determine the rotation speed of the magnetic transmission disk 2 27. The timing unit in the voltmeter can time the time when the voltage is generated, thereby determining the rotation angle of the magnetic transmission disk 2 27 based on the magnitude of the electromotive force and time.

[0048] This device, by providing a coil 22, a voltmeter and a timing unit, combined with the law of electromagnetic induction, can accurately sense the rotation angle of the magnetic transmission disk 27, thereby accurately controlling the opening position of each opening valve assembly 10. In addition, by providing a magnetic shielding shell 21, it can achieve magnetic shielding, which can prevent magnetic interference caused by the rotation of adjacent magnetic transmission disks 27, thereby increasing accuracy.

[0049] In order to solve the accuracy problem; Figure 5 、 6 As shown, the inner wall of the bracket 16 above each magnetic transmission disk 27 is fixedly embedded with a push-to-close signal switch 25, and the top of the electric turntable 17 is fixed with an inclined limit block 26 that cooperates with the push-to-close signal switch 25.

[0050] When the electric turntable 17 moves to the magnetic coupling position of the magnetic transmission disk 18 and the slot 28, the inclined limit block 26 on the top of the electric turntable 17 will press the press-close signal switch 25 at the corresponding position. The press-close signal switch 25 closes to generate an electrical signal to confirm the movement to the specified position, thereby ensuring the coupling accuracy of the magnetic transmission disk 18 and the magnetic transmission disk 2 27.

[0051] This device is provided with a press-close signal switch 25 and an inclined limit block 26. When the electric turntable 17 moves to the magnetic coupling position between the magnetic transmission disk 18 and the slot 28, the inclined limit block 26 on the top of the electric turntable 17 will press the press-close signal switch 25 at the corresponding position. The press-close signal switch 25 is closed to generate an electrical signal to determine that it has moved to the specified position, thereby ensuring the coupling accuracy between the magnetic transmission disk 18 and the magnetic transmission disk 2 27.

[0052] To solve the mobility problem; Figure 6 As shown, the linear drive assembly 15 includes a motor 29, a screw rod 30 and a guide rod 31. The guide rod 31 is fixed to the inner side of the bracket 16, and the electric turntable 17 is slidably connected to the outer wall of the guide rod 31. The screw rod 30 is rotatably connected to the inner wall of the bracket 16, and the screw rod 30 is connected to the inner wall of the electric turntable 17 through a thread. The motor 29 is fixed to the side wall of the bracket 16 by bolts, and the output shaft of the motor 29 is connected to the end of the screw rod 30 through a coupling.

[0053] When the motor 29 rotates, it can drive the screw rod 30 to rotate, thereby driving the electric turntable 17 to move along the guide rod 31 through the threaded connection.

[0054] When the present embodiment is in use, the circulating water of the circulating water storage unit 1 is diverted by the diverter valve group 2 and then enters each three-way valve 3. Part of the water source entering the three-way valve 3 is directly delivered to the target water pool 5, and the other part is delivered to the target water pool 5 after being depressurized through the venturi tube 4. At the same time, for the opening and closing and opening control of different branches of the diverter valve group 2, the linear drive component 15 can drive the electric turntable 17 to move linearly to the top of the corresponding valve housing 13. At this time, the magnetic transmission disk 18 and the magnetic transmission disk 2 27 are magnetically coupled. When the electric turntable 17 drives the magnetic transmission disk 18 to rotate, it can drive the magnetic transmission disk 2 27 to rotate, thereby causing the valve stem assembly 12 to drive the valve core 11 to rotate, so that the overlap of the flow channel between the valve core 11 and the valve housing 13 changes, thereby changing the flow ratio of the branch. In addition, since the water inlet direction of the inlet flange 6 is along the axial direction of the inlet flange 6, when diverting, the water flow will directly impact the middle opening valve assembly 10 for reversing. In this process, there will be A large amount of kinetic energy is lost, thereby increasing energy consumption. Based on this, the device sets a guide plate 8 and uses multiple guide plates 8 to form multiple diversion channels, so that the water flow is inclined to be diverted and diverted when entering the inlet flange 6. At the same time, since the magnetic transmission disk 2 27 is magnetic, when it rotates, it will generate an induced electromotive force in the coil 22 according to electromagnetic induction, and the faster the speed, the greater the electromotive force. The voltmeter can detect the size of the electromotive force to determine the speed of the magnetic transmission disk 2 27. The timing unit in the voltmeter can time the time when the voltage is generated, so as to determine the rotation angle of the magnetic transmission disk 2 27 according to the size of the electromotive force and time. When the electric turntable 17 moves to the magnetic coupling position of the magnetic transmission disk 1 18 and the card slot 28, the inclined limit block 26 on the top of the electric turntable 17 will press the press-close signal switch 25 at the corresponding position. The press-close signal switch 25 is closed to generate an electrical signal to determine the movement to the specified position, thereby ensuring the coupling accuracy of the magnetic transmission disk 1 18 and the magnetic transmission disk 2 27.

[0055] Example 2: A washing water circulation balancing device based on multi-channel valve control, such as Figure 1-Figure 7 As shown, in order to solve the stability problem; this embodiment makes the following improvements on the basis of embodiment 1: the valve stem assembly 12 consists of an outer rod 32 and an inner rod 33 that are rotatably connected to each other, the outer rod 32 is rotatably connected to the inner wall of the valve housing 13 and the bottom of the outer rod 32 is fixed to the outer wall of the valve core 11, the radial inner wall of the outer rod 32 is slidably connected with a plurality of blocks 24, the inner side wall of the block 24 is connected to the inner wall of the outer rod 32 through a spring 23, the inner wall of the circular area of ​​the valve housing 13 located at the block 24 is provided with a groove 28 that cooperates with the block 24, the outer wall of the inner rod 33 is fixed with a connecting rope 20, and the other end of the connecting rope 20 is fixedly connected to the side wall of the block 24.

[0056] When the present embodiment is in use, when the inner rod 33 is driven to rotate, the outer rod 32 cannot rotate because the block 24 is engaged with the slot 28. The inner rod 33 first rotates relative to the outer rod 32, and the block 24 is retracted into the outer rod 32 through the connecting rope 20. The block 24 is separated from the slot 28, and then the outer rod 32 and the inner rod 33 rotate synchronously. After rotating to the specified position, the rotational torque on the inner rod 33 disappears. At this time, the block 24 is moved outward by the elastic force of the spring 23 and engages with the slot 28, so that the outer rod 32 is locked.

[0057] This device, through targeted design of the valve stem assembly 12, can ensure that the position of the valve core 11 is locked in the non-adjustment state, thereby ensuring the stability of the flow ratio of each branch. At the same time, the locking and unlocking of the valve core 11 can be achieved by whether the inner rod 33 is driven, without the need for additional drive, further increasing the integration of the entire diverter valve group 2.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A washing water circulation balancing device based on multi-channel valve control, comprising a circulating water storage unit (1) and a plurality of target water pools (5), wherein the outlet of the circulating water storage unit (1) is connected to a diverter valve group (2), each outlet of the diverter valve group (2) is connected to a three-way valve (3), and the remaining two outlets of the three-way valve (3) are respectively connected to the inlet of the target water pool (5) and connected to the inlet of the target water pool (5) through a venturi tube (4), characterized in that: The diverter valve assembly (2) comprises an outer shell (7) and a plurality of opening valve assemblies (10) arranged in the outer shell (7), and a comprehensive execution unit (9) for driving the plurality of opening valve assemblies (10) is provided on an outer wall of one side of the outer shell (7); The opening valve assembly (10) comprises a valve housing (13) and a valve core (11) rotatably connected to the interior of the valve housing (13) via a valve stem assembly (12); The comprehensive actuator (9) includes a plurality of coupling assemblies (19) arranged on the outer wall of the valve housing (13), an electric turntable (17), and a magnetic transmission disc (18) fixed to the bottom of the electric turntable (17). The outer side of the outer shell (7) is driven by a linear drive assembly (15) and is equipped with a bracket (16). The bracket (16) is fixed to the outer wall of the outer shell (7) by bolts. The coupling assembly (19) includes a magnetic shielding shell (21) fixed to the outer wall of the valve shell (13) and a magnetic transmission disk (27) fixed to the end of the valve stem assembly (12) and matched with the magnetic transmission disk (18). When the magnetic transmission disk (18) is located above the magnetic transmission disk (27), the electric turntable (17) and the magnetic transmission disk (18) form a magnetic coupler. The linear drive assembly (15) includes a motor (29), a screw rod (30) and a guide rod (31), wherein the guide rod (31) is fixed to the inner side of the bracket (16), and the electric turntable (17) is slidably connected to the outer wall of the guide rod (31), the screw rod (30) is rotatably connected to the inner wall of the bracket (16), and the screw rod (30) is connected to the inner wall of the electric turntable (17) through a thread.

2. A washing water circulation balancing device based on multi-channel valve control according to claim 1, characterized in that: A plurality of guide plates (8) are fixed to the inner wall of the outer shell (7).

3. A washing water circulation balancing device based on multi-channel valve control according to claim 1, characterized in that: The water inlet side of the outer shell (7) is connected to an inlet flange (6), the water inlet side of the valve shell (13) is connected to the inner cavity of the outer shell (7), and the water outlet side of the valve shell (13) is fixed to a water outlet flange (14).

4. The washing water circulation balancing device based on multi-channel valve control according to claim 1, characterized in that: A coil (22) is fixed to the inner side wall of the magnetic shielding shell (21) at the second magnetic transmission disk (27), and a voltmeter is connected to both ends of the coil (22), and the voltmeter has a built-in timing unit.

5. The washing water circulation balancing device based on multi-channel valve control according to claim 1, characterized in that: The inner wall of the bracket (16) above each magnetic transmission disk (27) is fixedly embedded with a push-to-close signal switch (25), and the top of the electric turntable (17) is fixed with an inclined limit block (26) that cooperates with the push-to-close signal switch (25) to limit the position.

6. The washing water circulation balancing device based on multi-channel valve control according to claim 1, characterized in that: The motor (29) is fixed to the side wall of the bracket (16) by means of bolts, and the output shaft of the motor (29) is connected to the end of the screw rod (30) by means of a coupling.

7. The washing water circulation balancing device based on multi-channel valve control according to claim 1, characterized in that: The valve stem assembly (12) consists of an outer rod (32) and an inner rod (33) that are rotatably connected to each other, the outer rod (32) is rotatably connected to the inner wall of the valve housing (13), and the bottom of the outer rod (32) is fixed to the outer wall of the valve core (11).

8. The washing water circulation balancing device based on multi-channel valve control according to claim 7, characterized in that: The radial inner wall of the outer rod (32) is slidably connected to a plurality of clamping blocks (24), the inner side walls of the clamping blocks (24) are connected to the inner wall of the outer rod (32) via springs (23), and the inner wall of the circular area of ​​the valve housing (13) located at the clamping blocks (24) is provided with a clamping groove (28) that cooperates with the clamping blocks (24); A connecting rope (20) is fixed to the outer wall of the inner rod (33), and the other end of the connecting rope (20) is fixedly connected to the side wall of the clamping block (24).

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