Novel stop check valve with automatic adjusting function

Abstract

The utility model relates to the technical field of stop check valves, in particular to a novel stop check valve with an automatic adjusting function, which is automatically controlled, improves the reaction speed of a system and reduces the possibility of manual misoperation. Comprising a valve cover, a valve body, a first spring, a valve clack body, a valve seat, a valve rod, an adjusting assembly, a sensor and a controller, a containing space is formed in the valve body, and a liquid inlet and a liquid outlet which are communicated with each other are formed in the two opposite sides of the valve body. The first spring, the valve clack body and the valve seat are sequentially arranged in the containing space, and the two ends of the first spring are connected with the valve deck and the valve clack body respectively. The valve rod sequentially penetrates through the valve deck and the first spring and then abuts against the valve clack body. The adjusting assembly is in transmission connection with the valve rod and used for driving the valve rod to move. The sensor is installed in the valve body and used for collecting data, and the controller is used for processing the data and controlling the adjusting assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of globe check valves, in particular to a novel globe check valve with an automatic adjustment function. Background Art

[0002] The function of a globe valve is to control the flow of fluid by opening or closing the valve. When the valve is in the closed state, the flow of fluid is completely blocked, and when the valve is open, the fluid is allowed to pass through. The function of a check valve is to ensure that the fluid can only flow in one direction and automatically close when reverse pressure is detected, thereby preventing the backflow of the medium. A globe check valve is a multi-purpose valve that combines the functions of a globe valve and a check valve. It is usually designed to be used as a globe valve under normal operating conditions and switched to a reverse flow prevention mode in abnormal situations. This design simplifies the installation and maintenance of the pipeline system, reduces the number of valves required, and improves the reliability and safety of the system.

[0003] Existing valves rely on workers to manually operate and adjust according to personal experience. In large facilities or multi-pipeline systems, when faced with numerous valves that need to be adjusted, the manual adjustment method for each valve will greatly limit the response speed and flexibility of the system, making it difficult to meet the current requirements for quick response and precise control. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a novel globe check valve with an automatic adjustment function, which realizes automatic control, improves the reaction speed of the system, and reduces the possibility of human error.

[0005] The novel globe check valve with an automatic adjustment function of the utility model includes a valve cover, a valve body, a first spring, a valve flap body, a valve seat, a valve stem, an adjustment assembly, a sensor, and a controller, wherein:

[0006] The valve cover is connected to the valve body;

[0007] The valve body is internally provided with an accommodation space, and liquid inlets and outlets that communicate with each other are opened on opposite sides thereof;

[0008] The first spring, the valve flap body, and the valve seat are sequentially arranged in the accommodation space. Both ends of the first spring are respectively connected to the valve cover and the valve flap body; the valve stem sequentially passes through the valve cover and the first spring and then abuts against the valve flap body;

[0009] The adjustment assembly is in transmission connection with the valve stem and is used to drive the valve stem to move;

[0010] The sensor is installed in the valve body and is used to collect data, and the controller is used to process the data and control the adjustment assembly.

[0011] Further, an external thread is provided on the outer side of the valve stem, a screw sleeve is embedded in the valve cover, an internal thread is provided in the screw sleeve, and the internal thread meshes with the external thread.

[0012] Further, the adjusting assembly includes a driving wheel, a driven gear, a driving gear and a driving motor; the driving wheel is coaxially sleeved on the outer side of the valve stem and meshes with the valve stem, a first connecting rod slidably connected to the valve cover is arranged at the bottom end of the driving wheel, and a plurality of uniformly distributed limiting grooves are arranged on the circumferential wall of the driving wheel; the driven gear is coaxially sleeved on the outer side of the driving wheel, a second connecting rod slidably connected is arranged at the bottom end of the driven gear, and a plurality of limiting blocks abutted against the limiting grooves are arranged on the inner wall of the driven gear; the driving gear meshes with the driven gear, and the driving motor is used for driving the driving gear to rotate.

[0013] Further, a first slider is arranged at the bottom end of the first connecting rod, a first annular groove is formed in the valve cover, and the first slider slides in the first annular groove; a second slider is arranged at the bottom end of the second connecting rod, a second annular groove is formed in the valve cover, and the second slider slides in the second annular groove.

[0014] Further, an installation groove is formed in the driven gear, a plurality of electromagnets and a plurality of magnetic plates are installed in the installation groove, the electromagnets are installed on the inner wall of the installation groove far away from the driving wheel, the magnetic plates are movably installed on the inner wall of the other side of the installation groove, the limiting blocks are fixedly connected to the side walls of the magnetic plates, and openings for the limiting blocks to move are formed in the installation groove wall; the numbers of the electromagnets, the magnetic plates and the limiting blocks correspond to each other; an annular conductive sheet is installed in the second annular groove, a sliding piece abutted against the annular conductive sheet is installed at the bottom of the limiting block, the annular conductive sheet is connected to an external power supply, and the sliding piece is connected to the magnetic plate.

[0015] Further, the magnetic plate is made of soft magnetic material.

[0016] Further, the adjusting assembly further includes a manual operating mechanism, and the manual operating mechanism includes a handle, a plurality of switches and a plurality of second springs; the handle is installed at the top end of the valve stem, a plurality of holding grooves are uniformly formed on the outer circumference of the handle, the switches are installed in the holding grooves, and the second springs are installed between the magnetic plate and the installation groove; the switches are used for controlling the connection between the annular conductive sheet and the power supply.

[0017] Further, the plurality of second springs are divided into multiple groups, each group includes at least two second springs, and the two are symmetrically installed on both sides of the magnetic plate.

[0018] Further, a protective cover is arranged on the valve cover, the driving wheel, the driven gear and the driving gear are covered inside the protective cover, and a through hole for the valve stem to pass through is formed in the protective cover.

[0019] Further, a sealing gasket is installed at the bottom end of the valve flap body, and a convex portion is arranged on the valve seat.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. The state of the fluid is monitored in real time by sensors, and the data is transmitted to the controller. The controller analyzes this data according to preset conditions or algorithms and sends instructions to the adjustment component to adjust the position of the valve stem, thereby achieving the opening or closing of the valve. This method can significantly improve the reaction speed and flexibility of the system.

[0022] 2. Automated adjustment can provide more precise control than manual adjustment, ensuring that the flow of the fluid in the pipeline system meets the set requirements. This helps to optimize the performance of the entire system and protect the equipment from unnecessary damage.

[0023] 3. The use of automatic control reduces the influence of human factors and reduces operating errors caused by human negligence or lack of experience, further improving the reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present utility model will be further described below in conjunction with the drawings.

[0025] Figure 1 is a schematic structural view of the present utility model;

[0026] Figure 2 is a schematic sectional structural view of the present utility model;

[0027] Figure 3 is Figure 2 an enlarged schematic structural view of part D in

[0028] Figure 4 a schematic view of a part of the structure of the present utility model Figure 1 ;

[0029] Figure 5 a schematic view of a part of the structure of the present utility model Figure 2 ;

[0030] Figure 6 is a schematic internal structure view of the driven gear of the present utility model;

[0031] Figure 7 is Figure 6 an enlarged schematic structural view of part E in

[0032] Marks in the attached drawings: 1. Valve cover; 11. First annular groove; 12. Second annular groove; 13. Annular conductive sheet; 2. Valve body; 3. First spring; 4. Valve flap body; 5. Valve seat; 6. Valve rod; 7. Adjustment assembly; 71. Driving wheel; 711. First connecting rod; 712. Limit groove; 713. First slider; 72. Driven gear; 721. Second connecting rod; 722. Limit block; 723. Second slider; 724. Installation groove; 725. Electromagnet; 726. Magnetic plate; 73. Driving gear; 74. Driving motor; 75. Manual operation mechanism; 751. Handle; 752. Switch; 753. Second spring; 754. Holding groove; 8. Screw sleeve; 9. Protective cover; A. Liquid inlet; B. Liquid outlet; C. Accommodation space. Detailed implementation manners

[0033] The following combines the attached drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0034] As Figures 1 to 7 shown, the novel globe check valve with an automatic adjustment function of the present utility model includes a valve cover 1, a valve body 2, a first spring 3, a valve flap body 4, a valve seat 5, a valve rod 6, an adjustment assembly 7, a sensor and a controller, wherein:

[0035] The valve cover 1 is connected to the valve body 2;

[0036] An accommodation space C is provided inside the valve body 2, and liquid inlets A and liquid outlets B that communicate with each other are provided on opposite sides thereof;

[0037] The first spring 3, the valve flap body 4 and the valve seat 5 are sequentially arranged in the accommodation space C, and both ends of the first spring 3 are respectively connected to the valve cover 1 and the valve flap body 4;

[0038] The valve rod 6 passes through the valve cover 1 and the first spring 3 in sequence and then abuts against the valve flap body 4;

[0039] The adjustment assembly 7 is in transmission connection with the valve rod 6 and is used to drive the valve rod 6 to move;

[0040] The sensor is installed inside the valve body 2 and is used to collect data, and the controller is used to process the data and control the adjustment assembly 7;

[0041] The liquid inlet A and the liquid outlet B of the valve body 2 are used to connect to the pipeline system. The function of the first spring 3 is to provide a pre-tightening force to the valve flap body 4, so that the valve flap body 4 abuts against the valve seat 5 and closes the flow passage without external power. When the fluid enters through the liquid inlet A, it will exert pressure on the valve flap body 4 to overcome the resistance of the first spring 3, and the valve flap body 4 will lift from the valve seat 5, allowing the fluid to flow out through the liquid outlet B. If the fluid tries to flow in the reverse direction, that is, from the liquid outlet B to the liquid inlet A, the valve flap body 4 will be pushed back to the valve seat 5 by the first spring 3 to prevent backflow; the sensor is used to monitor parameters such as the pressure, temperature, and flow rate of the fluid and send this information to the controller; the position of the bottom end of the valve stem 6 has a direct control effect on the fluid flow rate. When the adjustment assembly 7 receives the instruction sent by the controller, it drives the valve stem 6 to move up and down a specific distance to control the height that the valve flap body 4 can lift, thereby accurately restricting the flow rate; when the valve flap body 4 is lifted to the maximum height, the opening between the valve flap body 4 and the valve seat 5 is the largest, and at this time the maximum flow rate that the fluid can pass through is also the largest; if the bottom end of the valve stem 6 only lifts the valve flap body 4 to a certain intermediate position, only part of the fluid can pass through, realizing partial restriction of the flow rate; when the bottom end of the valve stem 6 makes the valve flap body 4 fit the valve seat 5, the valve is completely closed and no fluid can pass through.

[0042] External threads are provided on the outside of the valve stem 6, and a screw sleeve 8 is embedded in the valve cover 1. Internal threads are provided in the screw sleeve 8, and the internal threads are meshed with the external threads; the threaded connection provides a stable and reliable transmission method, ensuring the straightness and stability of the valve stem 6 during the up and down movement process, and avoiding deviation or shaking; at the same time, the sealing performance between the valve cover 1 and the valve stem 6 can be improved to a certain extent through the threaded connection, and it can effectively prevent fluid leakage.

[0043] Specifically, the adjustment component 7 includes a transmission wheel 71, a driven gear 72, a driving gear 73, and a driving motor 74. The transmission wheel 71 is coaxially sleeved outside the valve stem 6 and meshes with the valve stem 6. A first connecting rod 711 that is slidably connected to the valve cover 1 is provided at the bottom end of the transmission wheel 71. A number of uniformly distributed limiting grooves 712 are provided on the peripheral wall of the transmission wheel 71. The driven gear 72 is coaxially sleeved outside the transmission wheel 71. A second connecting rod 721 that is slidably connected is provided at the bottom end of the driven gear 72. A number of limiting blocks 722 that abut against the limiting grooves 712 are provided on the inner wall of the driven gear 72. The driving gear 73 meshes with the driven gear 72, and the driving motor 74 is used to drive the driving gear 73 to rotate. When the position of the valve stem 6 needs to be adjusted, the driving motor 74 receives a signal from the controller and starts to work. The driving motor 74 drives the driving gear 73 to rotate, and at the same time, the driven gear 72 also starts to rotate through the meshing between the gear teeth. The first connecting rod 711 and the second connecting rod 721 ensure that the transmission wheel 71 and the driven gear 72 only rotate in the horizontal plane. Through the cooperation of the limiting blocks 722 and the limiting grooves 712, the rotation of the driven gear 72 is transmitted to the transmission wheel 71. Since the transmission wheel 71 can only rotate horizontally and does not move up and down, the valve stem 6 will move axially, thereby realizing the adjustment process.

[0044] Preferably, a first slider 713 is provided at the bottom end of the first connecting rod 711. A first annular groove 11 is formed on the valve cover 1, and the first slider 713 slides in the first annular groove 11. A second slider 723 is provided at the bottom end of the second connecting rod 721. A second annular groove 12 is formed on the valve cover 1, and the second slider 723 slides in the second annular groove 12. Through this design, an accurate guiding path is provided for the transmission wheel 71 and the driven gear 72, ensuring the stability of the transmission wheel 71 and the driven gear 72 during rotation, reducing unnecessary vibration or deviation, and thus improving the accuracy of the position control of the valve stem 6. By providing stable support, the smooth transmission of power from the driving motor 74 to the valve stem 6 is ensured, reducing energy loss and improving efficiency.

[0045] Preferably, an installation groove 724 is formed in the driven gear 72. A plurality of electromagnets 725 and a plurality of magnetic plates 726 are installed in the installation groove 724. The electromagnets 725 are installed on the inner wall of the installation groove 724 away from the driving wheel 71, and the magnetic plates 726 are movably installed on the inner wall of the other side of the installation groove 724. The limiting block 722 is fixedly connected to the side wall of the magnetic plate 726. An opening for the limiting block 722 to move is formed in the wall of the installation groove 724; the numbers of the electromagnets 725, the magnetic plates 726 and the limiting blocks 722 correspond to each other; an annular conductive sheet 13 is installed in the second annular groove 12. A sliding piece abutting against the annular conductive sheet 13 is installed at the bottom of the limiting block 722. The annular conductive sheet 13 is connected to an external power supply, and the sliding piece is connected to the magnetic plate 726; through the cooperation of the annular conductive sheet 13 and the sliding piece, a continuous circuit is formed. When the electromagnet 725 is powered on, a magnetic field will be generated, repelling the magnetic plate 726, thereby driving the limiting block 722 to move out of the installation groove 724 through the opening and keeping stable contact with the limiting groove 712; as the driven gear 72 rotates, the sliding piece slides on the annular conductive sheet 13, records the position information, and transmits it to the controller through the circuit, forming a closed-loop control system to ensure that the valve opening meets the expected setting.

[0046] Preferably, the magnetic plate 726 is made of soft magnetic material; through this design, the high magnetic permeability of the soft magnetic material enables the magnetic plate 726 to quickly respond to the magnetic field change generated by the electromagnet 725, which ensures the rapid response of the system; the soft magnetic material quickly demagnetizes after power-off, reducing the influence of residual magnetism on the system.

[0047] To provide a more flexible and convenient operation method, the adjusting assembly 7 further includes a manual operation mechanism 75. The manual operation mechanism 75 includes a handle 751, a plurality of switches 752 and a plurality of second springs 753; the handle 751 is installed at the top of the valve stem 6. A plurality of holding grooves 754 are evenly formed on the outer circumference of the handle 751. The switches 752 are installed in the holding grooves 754. The second springs 753 are installed between the magnetic plate 726 and the installation groove 724; the switches 752 are used to control the connection between the annular conductive sheet 13 and the power supply; through the manual operation mechanism 75, the system can be adjusted automatically or manually when there is power supply, and can also be manually operated when there is a power outage, adapting to different working requirements and environmental changes; through the holding grooves 754 on the circumference of the handle 751, a comfortable holding feeling is provided, facilitating the operator to perform manual adjustment; the switches 752 are touch-type, and a plurality of switches 752 are connected in series. When there is power supply, operating the handle 751 will naturally touch the switches 752, immediately disconnecting the connection between the annular conductive sheet 13 and the power supply, so that the electromagnet 725 is powered off. When there is a power outage, the electromagnet 725 is automatically powered off; the magnetic plate 726 quickly resets under the action of the second spring 753, and the limiting block 722 moves into the installation groove 724 and does not contact the limiting groove 712. When the handle 751 is rotated, the valve stem 6 rotates synchronously, so as to realize the control of the up and down distance of the valve stem 6.

[0048] To ensure sufficient reset force and stability of the magnetic plate 726, several second springs 753 are divided into multiple groups, with each group including at least two second springs 753. Two of them are symmetrically installed on both sides of the magnetic plate 726. By symmetrically installing the second springs 753, it ensures that the magnetic plate 726 is evenly stressed during reset, reducing the risk of deviation or jamming, thereby improving the stability and speed of reset. The multiple second springs 753 provide a redundant design. Even if one spring fails, the other springs can still provide sufficient reset force to ensure the normal operation of the system. The evenly distributed spring load reduces the wear of a single spring, extends the service life, and reduces the maintenance frequency.

[0049] To improve the safety and reliability of the adjusting component 7, a protective cover 9 is provided on the valve cover 1. The protective cover 9 covers the driving wheel 71, the driven gear 72, and the driving gear 73 inside. A through hole for the valve stem 6 to pass through is provided on the protective cover 9. By means of the protective cover 9, it prevents external objects or personnel from contacting these moving parts, reducing the risk of accidental injury. The protective cover 9 is of a detachable design, which is convenient for inspecting and maintaining the internal parts.

[0050] Preferably, a sealing gasket is installed at the bottom end of the valve flap body 4, and a convex portion is provided on the valve seat 5. The sealing gasket is made of a material with high temperature resistance, corrosion resistance, and good elasticity to ensure that it can maintain good sealing performance under various working conditions. The convex portion matches the sealing gasket on the valve flap body 4 to ensure that an effective seal can be formed when the two come into contact.

[0051] The operation process of the novel globe check valve with automatic adjustment function of the present utility model during operation is as follows:

[0052] In the initial state, the valve is closed. The bottom end of the valve stem 6 abuts against the valve flap body 4, and the valve flap body 4 is located at the lowest position. The sealing gasket is in close contact with the convex portion on the valve seat 5 to form a complete seal, preventing the fluid from passing through.

[0053] When there is power supply, it can be operated automatically or manually; the sensor monitors parameters such as the pressure, temperature, and flow rate of the fluid, and sends this information to the controller. The annular conductive sheet 13 cooperates with the wiper to form a continuous circuit, energizing the electromagnet 725. The electromagnet 725 generates a magnetic field, repelling the magnetic plate 726, overcoming the resistance of the second spring 753, causing the limit block 722 to move outward from the installation groove 724 and contact the limit groove 712. The controller issues an instruction according to the set parameters or external signals, driving the motor 74 to start, driving the driving gear 73 to rotate. Through the meshing between the gear teeth, the driven gear 72 also starts to rotate. The limit block 722 drives the transmission wheel 71 to rotate synchronously on the horizontal plane, moving the valve stem 6 up and down to adjust the position of the valve flap body 4, realizing the flow regulation process; when the operator holds the handle 751 for manual adjustment, the finger will naturally touch the touch switch 752 installed in the holding groove 754. After the switch 752 is triggered, the connection between the annular conductive sheet 13 and the power supply is immediately disconnected, causing the electromagnet 725 to lose power. The magnetic plate 726 quickly resets under the action of the second spring 753, and the limit block 722 moves inside the installation groove 724 and no longer contacts the limit groove 712. The operator can directly control the up and down movement of the valve stem 6 by rotating the handle 751, thereby adjusting the valve opening and controlling the flow rate;

[0054] When there is no power supply, only manual operation can be performed; the electromagnet 725 is automatically de-energized, the magnetic plate 726 quickly resets under the action of the second spring 753, the limit block 722 moves into the installation groove 724 and no longer contacts the limit groove 712. The operator can directly control the up and down movement of the valve stem 6 by rotating the handle 751 to manually adjust the position of the valve stem 6;

[0055] If the fluid attempts to flow reversely, that is, from the liquid outlet B to the liquid inlet A, the valve flap body 4 will be pushed back onto the valve seat 5 by the first spring 3 to prevent reverse flow.

[0056] For the novel globe check valve with automatic adjustment function of the present utility model, its installation method, connection method or setting method are all common mechanical methods, and any implementation that can achieve its beneficial effects can be carried out.

[0057] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A new type of stop check valve with an automatic adjustment function, characterized in that, It includes a valve cover (1), a valve body (2), a first spring (3), a valve flap body (4), a valve seat (5), a valve stem (6), an adjustment assembly (7), a sensor and a controller; wherein: The valve cover (1) is connected to the valve body (2); An accommodation space (C) is provided inside the valve body (2), and a liquid inlet (A) and a liquid outlet (B) which are communicated with each other are opened on two opposite sides thereof; The first spring (3), the valve flap body (4) and the valve seat (5) are sequentially arranged in the accommodation space (C), and two ends of the first spring (3) are respectively connected to the valve cover (1) and the valve flap body (4); The valve stem (6) sequentially passes through the valve cover (1) and the first spring (3) and then abuts against the valve flap body (4); The adjustment assembly (7) is in transmission connection with the valve stem (6) and is used for driving the valve stem (6) to move; The sensor is installed inside the valve body (2) for collecting data, and the controller is used for processing data and controlling the adjustment assembly (7).

2. The novel stop check valve with an automatic adjustment function according to claim 1, characterized in that, External threads are provided on the outer side of the valve stem (6), a screw sleeve (8) is embedded in the valve cover (1), internal threads are provided in the screw sleeve (8), and the internal threads are meshed with the external threads.

3. The novel stop check valve with an automatic adjustment function according to claim 1, characterized in that, The adjustment assembly (7) includes a driving wheel (71), a driven gear (72), a driving gear (73) and a driving motor (74); the driving wheel (71) is coaxially sleeved on the outer side of the valve stem (6) and is meshed with the valve stem (6), a first connecting rod (711) which is slidably connected to the valve cover (1) is arranged at the bottom end of the driving wheel (71), and a plurality of uniformly distributed limiting grooves (712) are arranged on the peripheral wall of the driving wheel (71); the driven gear (72) is coaxially sleeved on the outer side of the driving wheel (71), a second connecting rod (721) which is slidably connected thereto is arranged at the bottom end of the driven gear (72), and a plurality of limiting blocks (722) which abut against the limiting grooves (712) are arranged on the inner wall of the driven gear (72); the driving gear (73) is meshed with the driven gear (72), and the driving motor (74) is used for driving the driving gear (73) to rotate.

4. The novel stop check valve with an automatic adjustment function according to claim 3, characterized in that, A first slider (713) is arranged at the bottom end of the first connecting rod (711), a first annular groove (11) is formed in the valve cover (1), and the first slider (713) slides in the first annular groove (11); A second slider (723) is arranged at the bottom end of the second connecting rod (721), a second annular groove (12) is formed in the valve cover (1), and the second slider (723) slides in the second annular groove (12).

5. The novel stop check valve with an automatic adjustment function according to claim 4, characterized in that, An installation groove (724) is formed in the driven gear (72). A plurality of electromagnets (725) and a plurality of magnetic plates (726) are installed in the installation groove (724). The electromagnets (725) are installed on the inner wall of the installation groove (724) away from the driving wheel (71). The magnetic plates (726) are movably installed on the inner wall of the other side of the installation groove (724). The limiting block (722) is fixedly connected to the side wall of the magnetic plate (726). An opening for the limiting block (722) to move is formed in the wall of the installation groove (724). The numbers of the electromagnets (725), the magnetic plates (726) and the limiting blocks (722) correspond to each other. An annular conductive sheet (13) is installed in the second annular groove (12). A sliding piece in contact with the annular conductive sheet (13) is installed at the bottom of the limiting block (722). The annular conductive sheet (13) is connected to an external power supply. The sliding piece is connected to the magnetic plate (726).

6. The novel stop check valve with an automatic adjustment function according to claim 5, characterized in that, The magnetic plate (726) is made of soft magnetic material.

7. The novel stop check valve with an automatic adjustment function as claimed in claim 5, characterized in that, The adjusting assembly (7) further includes a manual operation mechanism (75). The manual operation mechanism (75) includes a handle (751), a plurality of switches (752) and a plurality of second springs (753). The handle (751) is installed at the top end of the valve rod (6). A plurality of holding grooves (754) are evenly formed on the circumferential outer side of the handle (751). The switches (752) are installed in the holding grooves (754). The second springs (753) are installed between the magnetic plate (726) and the installation groove (724). The switches (752) are used to control the connection between the annular conductive sheet (13) and the power supply.

8. The novel stop check valve with an automatic adjustment function according to claim 7, characterized in that, The plurality of second springs (753) are divided into multiple groups. Each group includes at least two second springs (753). The two second springs (753) are symmetrically installed on both sides of the magnetic plate (726).

9. The novel stop check valve with an automatic adjustment function according to claim 3, characterized in that, A protective cover (9) is arranged on the valve cover (1). The driving wheel (71), the driven gear (72) and the driving gear (73) are covered inside the protective cover (9). A through hole for the valve rod (6) to pass through is formed in the protective cover (9).

10. The novel stop check valve with an automatic adjustment function according to claim 1, characterized in that, A sealing gasket is installed at the bottom end of the valve flap body (4). A convex portion is arranged on the valve seat (5).

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