Double-end self-sealing ball valve with stem self-locking function and working method

Abstract

The present invention relates to a double-end self-sealing ball valve with a valve stem self-locking function and a working method applied to the field of self-sealing ball valves, comprising a valve body, a ball, a valve stem, a self-locking mechanism and a valve intelligent controller; the valve stem is divided into two sections, which are respectively a valve stem one connected to a handle and a valve stem two connected to the ball; the self-locking mechanism comprises a shell fixed to the valve body, a connecting block vertically moving in an inner cavity of the shell, a self-locking rod laterally plugged along the outer circumference of the shell, and a driving member installed on the shell; an electric control module, an electric control button, an early warning module and a reminder module are provided on the valve intelligent controller. By adopting the above structure, manual and electric control operations can be performed to improve the convenience of operation, and the self-locking function of the valve stem can be realized. Intelligent control is realized through the valve intelligent controller, and a corresponding early warning signal is sent when the valve stem is operated to remind the staff that someone is operating, thereby improving the safety of the ball valve.

Description

Technical Field

[0001] The invention relates to a ball valve, in particular to a double-end self-sealing ball valve with a valve stem self-locking function and a working method thereof, which is applied to the technical field of self-sealing ball valves. Background Art

[0002] A ball valve usually includes two valve bodies that are buckled relative to each other, a spherical valve core located in a valve cavity surrounded by the two valve bodies, and a valve stem at one end connected to the spherical valve core and the other end located outside the valve body. The spherical valve core is driven by rotating the valve stem so that the valve hole in the spherical valve core is opposite to or offset from the interfaces of the two valve bodies, thereby realizing the opening and closing of the ball valve and controlling the on and off of the pressure medium (such as hydraulic oil or high-pressure gas).

[0003] The specification of Chinese invention patent CN117588579A discloses a high-sealing ball valve, which includes a left valve body and a right valve body installed on the right side of the left valve body, one end of the right valve body is fixedly connected to a plurality of annular equidistantly distributed mounting rods, one end of the left valve body is provided with a fixing nut for fixing the mounting rod, a ball is installed at the opening of the left valve body and the right valve body, an adjusting rod is installed on the top of the ball, an adjusting dial is installed on the top of the adjusting rod, and a fixed rotation mechanism is installed inside the right valve body; a sealing mechanism is used to tightly fit the ball between the left valve body and the right valve body, and the sealing mechanism is installed on both sides of the ball; the above technical solution drives the adjusting rod and the ball to rotate by rotating the adjusting dial, and improves the fit between the opening of the left valve body and the right valve body and the ball through the tightly fitting sealing mechanism, thereby improving its sealing effect.

[0004] When the above technical method is implemented, the rotation of the ball can be directly controlled mainly by turning the adjusting dial, thereby controlling the circulation of the medium in the ball valve. However, when the medium in the ball valve has a large impact on the ball, it generates thrust on the ball, which may cause the ball to drive the valve stem and the adjusting dial or handle to rotate, resulting in the inability to accurately control the valve body. In addition, other personnel can directly turn the adjusting dial or handle to control the rotation of the ball, resulting in certain misoperations that affect the normal use of the valve body. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that when the medium in the ball valve has a large impact on the ball, a thrust is generated on the ball, which may cause the ball to drive the valve stem and the adjusting dial or handle to rotate, resulting in the inability to accurately control the valve body, and other personnel can directly turn the adjusting dial or handle to control the rotation of the ball, which may lead to certain misoperations and affect the normal use of the valve body.

[0006] In order to solve the above problems, the present invention provides a double-end self-sealing ball valve with a valve stem self-locking function, which comprises:

[0007] Valve body;

[0008] The ball is installed in the valve body, and the valve body is embedded with a self-sealing ring that matches the inlet and outlet of the ball;

[0009] A valve stem, a handle is installed on the top of the valve stem, and the valve stem is divided into two sections, namely valve stem one connected to the handle and valve stem two connected to the ball;

[0010] A self-locking mechanism is arranged at the connection between valve stem 1 and valve stem 2. The self-locking mechanism comprises a shell fixed to the valve body, a connecting block which can move vertically in the inner cavity of the shell, a plurality of self-locking rods which radially penetrate the connecting block and extend outward, and a driving member installed on the shell. The end of valve stem 2 is plugged into the bottom of the connecting block through a spline, and valve stem 1 is plugged into the top of the connecting block through a spline; a linkage assembly is arranged between valve stem 1 and the self-locking rod to control the lateral movement of the self-locking rod through the axial movement of valve stem 1; a bevel gear ring is installed on the top of the connecting block, an output end of the driving member extends into the shell and is installed with a bevel gear which can mesh with the bevel gear ring, a magnetic ring is installed on the outer ring of the connecting block, and an electromagnet located below the magnetic ring is installed in the shell; a pressure sensor is installed in the inner cavity of the connecting block and below the bottom of valve stem 1;

[0011] The valve intelligent controller is installed on the valve body, and is provided with an electronic control module, an electronic control button, an early warning module and a reminder module. The electronic control module is electrically connected to the early warning module, the electronic control button, the electromagnet and the driving component respectively, and the early warning module is electrically connected to the reminder module and the pressure sensor respectively.

[0012] In the above-mentioned double-end self-sealing ball valve with valve stem self-locking function, manual and electric control operations can be performed to improve the convenience of operation, and the self-locking function of the valve stem can be realized. Intelligent control is achieved through the valve intelligent controller, and corresponding early warning signals are sent when the valve stem is operated to remind the staff that someone is operating, thereby improving the safety of the ball valve.

[0013] As a further improvement of the present invention, the linkage assembly includes an active groove opened on the side of the lower end of the valve stem and opened at a position corresponding to the self-locking rod, an inclined groove opened obliquely on the side wall of the active groove, and a slider installed on the self-locking rod, and the slider slides along the inclined groove.

[0014] As a further improvement of the present invention, a limiting groove is provided at the front end of the self-locking rod, and a friction block is fixed at a position corresponding to the inner wall of the shell and the front end of the self-locking rod.

[0015] As a further improvement of the present invention, an elastic member is installed in the inner cavity of the connecting block, and the elastic member is located below the bottom of the valve stem 1; there are multiple electromagnets, and the multiple electromagnets are evenly distributed along the circumference of the magnetic ring.

[0016] As another improvement of the present invention, the double-end self-sealing ball valve also includes a self-sealing mechanism, which includes a guide cavity opened on the valve body and a booster tank installed on the valve body. Push rods that are laterally plugged into the guide cavity are fixed on the side of the two self-sealing rings away from the ball body. The bottom of the booster tank is connected to the guide cavity through a three-way pipe, and an electromagnetic valve is installed between the booster tank and the three-way pipe.

[0017] As another improvement supplement to the present invention, the self-sealing mechanism also includes an air pump installed on the valve body, and a three-way pipe 2 is installed at the air inlet of the air pump, one of the ports of the three-way pipe 2 is connected to the three-way pipe 1, and an electromagnetic valve 2 is installed between the two; the air outlet of the air pump is connected to the booster tank through a pipeline.

[0018] As another improved supplement of the present invention, an air pressure sensor is installed inside the booster tank, and a sealing control module is also provided on the valve intelligent controller. The sealing control module is electrically connected to the early warning module, solenoid valve 1, solenoid valve 2, air pump and air pressure sensor respectively.

[0019] As another improvement of the present invention, a plurality of push rods are evenly fixed to the outer ring of the self-sealing ring, the plurality of push rods are transversely plugged into the guide cavity, and a sealing ring is embedded in the outer ring of the push rods.

[0020] The working method of the double-end self-sealing ball valve with valve stem self-locking function is as follows:

[0021] S1. Manual control: By holding the handle to control the valve stem to press down, the self-locking rod shrinks into the connection block to release the lock of the connection block, and the ball is controlled to rotate to a specified angle by turning the handle. At this time, release the handle, the handle and the valve stem are reset, and the self-locking rod extends to lock the connection block and self-lock the valve stem;

[0022] S2. Electric control: Send the corresponding control signal to the electric control module through the electric control button. The electric control module controls the electromagnet to generate magnetism. The connection block drives the self-locking rod to move upward synchronously. During the upward movement, the self-locking rod shrinks to the inner cavity of the connection block to release the lock of the connection block. The connection block moves up to the specified position. The drive member drives the connection block to rotate synchronously. The connection block controls the valve stem 2 and the ball to rotate to the specified position. After the electric control is completed, the electric control module controls the electromagnet to stop working, the connection block and the magnetic ring are reset, and the self-locking rod extends to lock the connection block, thereby self-locking the valve stem.

[0023] S3. Operation warning: When the positions of valve stem 1 and the connecting block move relative to each other, the pressure sensor will receive the pressure signal applied by valve stem 1 and transmit the pressure signal to the warning module. The warning module will send a corresponding warning signal to the reminder module to remind the staff that someone is operating.

[0024] To sum up, the present invention can perform manual and electric control operations, improve the convenience of operation, and after the operation is completed, the self-locking rod is extended to lock the connecting block, thereby realizing the self-locking function of the valve stem and simultaneously realizing automatic early warning reminders. The valve intelligent controller simultaneously realizes electric control and automatic early warning reminders, and sends corresponding early warning signals when operating the valve stem to remind the staff that someone is operating, thereby improving the safety of the use of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the first and second embodiments of the present invention;

[0026] Figure 2 It is a schematic diagram of the valve body and the self-locking mechanism structure of the first and second embodiments of the present invention;

[0027] Figure 3 Schematic diagram of the position of the valve stem and the connecting block of the first and second embodiments of the present invention;

[0028] Figure 4 A cross-sectional view of a shell according to the first and second embodiments of the present invention;

[0029] Figure 5 The first and second embodiments of the present invention Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 It is a schematic diagram of the valve stem when it moves downward according to the first and second embodiments of the present invention;

[0031] Figure 7 It is a schematic diagram of the connection block moving upward according to the first and second embodiments of the present invention;

[0032] Figure 8 This is a control principle block diagram of a valve intelligent controller according to a first embodiment of the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the valve body and the self-sealing mechanism of the first and second embodiments of the present invention;

[0034] Fig.10 It is a schematic diagram of the structure of the self-sealing mechanism of the first and second embodiments of the present invention;

[0035] Fig.11 This is a control principle block diagram of a valve intelligent controller according to a second embodiment of the present invention.

[0036] Description of the numbers in the figure:

[0037] 1. Valve body; 2. Self-locking mechanism; 3. Valve stem 1; 4. Handle; 5. Valve intelligent controller; 6. Drive element; 7. Air pump; 8. Booster tank; 9. Ball; 10. Valve stem 2; 11. Connecting block; 12. Shell; 13. Self-locking rod; 14. Bevel gear; 15. Friction block; 16. Bevel gear ring; 17. Pressure sensor; 18. Magnetic ring; 19. Electromagnet; 20. Elastic element; 21. Movable groove; 22. Slider; 23. Inclined groove; 24. Self-sealing ring; 25. Guide cavity; 26. Push rod; 27. Air pressure sensor; 28. Three-way pipe 1; 29. ​​Solenoid valve 1; 30. Solenoid valve 2. DETAILED DESCRIPTION

[0038] Two implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0039] The first implementation method:

[0040] Figure 1-Figure 8 A double-end self-sealing ball valve with a valve stem self-locking function is shown, which includes a valve body 1, a ball 9, a valve stem, a self-locking mechanism 2 and a valve intelligent controller 5; the ball 9 is installed in the valve body 1, and the valve body 1 is embedded with a self-sealing ring 24 that matches the inlet and outlet of the ball 9; a handle 4 is installed on the top of the valve stem, and the valve stem is divided into two sections, namely a valve stem 1 3 connected to the handle 4 and a valve stem 2 10 connected to the ball 9, the valve stem is controlled to rotate by the handle 4, and the valve stem is used to drive the ball 9 to rotate, thereby controlling the flow rate and flow of the medium passing through the valve body 1.

[0041] It is worth mentioning that see Figure 2-Figure 4 , the self-locking mechanism 2 is arranged at the connection between the valve stem 13 and the valve stem 2 10, the self-locking mechanism 2 includes a shell 12 fixed to the valve body 1, a connecting block 11 that can move vertically in the inner cavity of the shell 12, a plurality of self-locking rods 13 that radially penetrate the connecting block 11 and extend outward, and a driving member 6 installed on the shell 12, the end of the valve stem 2 10 is plugged into the bottom of the connecting block 11 through a spline, the valve stem 13 is plugged into the top of the connecting block 11 through a spline, the valve stem 2 10 and the valve stem 13 are plugged in along the axial direction of the connecting block 11, and the plug-in hole on the connecting block 11 for plugging the valve stem 2 10 is not connected with the plug-in hole for plugging the valve stem 13, when the connecting block 11 rotates around its axis, the valve stem 13 and the valve stem 2 10 can be synchronously driven to rotate, because the self-locking rod 13 and the connecting block 11 are horizontally plugged, when the end of the self-locking rod 13 contacts the inner wall of the shell 12, it locks the rotation of the connecting block 11, thereby limiting the rotation of the valve stem.

[0042] A linkage assembly is provided between the valve stem 3 and the self-locking rod 13, so as to control the lateral movement of the self-locking rod 13 by the axial movement of the valve stem 3, and control the self-locking rod 13 to retract into the connecting block 11 to release the lock of the connecting block 11 by pushing the valve stem 3 to move toward the inner cavity of the connecting block 11; conversely, when the valve stem 3 moves away from the inner cavity of the connecting block 11, the self-locking rod 13 is controlled to extend and contact with the inner wall of the shell 12 to lock the connecting block 11; a bevel gear ring 16 is installed on the top of the connecting block 11, and the output end of the driving member 6 extends into the shell 12 and is installed with a bevel gear 14 that can mesh with the bevel gear ring 16. A magnetic ring 18 is installed on the outer ring of the connecting block 11, and an electromagnet 19 located below the magnetic ring 18 is installed in the shell 12; a pressure sensor 17 is installed in the inner cavity of the connecting block 11 and located below the bottom of the valve stem 3. When electric control operation is required, magnetism is generated by the electromagnet 19 and the magnetic ring 18 is pushed upward. At this time, the magnetic ring 18 drives the connecting block 11 to move upward, and the self-locking rod 13 moves upward synchronously with the connecting block 11, so that the self-locking rod 13 and the valve stem 3 are misaligned, and the self-locking rod 13 shrinks to the inner cavity of the connecting block 11 to release the lock of the connecting block 11. At this time, the top bevel gear ring 16 of the connecting block 11 is meshed with the bevel gear 14 on the driving member 6, and the driving member 6 drives the connecting block 11 to rotate forward and reverse, thereby driving the ball 9 to rotate, realizing the electric control function.

[0043] In addition, the valve intelligent controller 5 is installed on the valve body 1. The valve intelligent controller 5 is provided with an electric control module, an electric control button, an early warning module and a reminder module. The electric control module is electrically connected to the early warning module, the electric control button, the electromagnet 19 and the driving member 6 respectively. The early warning module is electrically connected to the reminder module and the pressure sensor 17 respectively. When it is necessary to control the rotation of the ball 9, when manual operation is performed, the valve stem 3 is controlled to be pressed down by holding the handle 4. At this time, the self-locking rod 13 is retracted into the connecting block 11 to release the lock of the connecting block 11. At the same time, the pressure sensor 17 receives the valve The pressure signal applied by the stem 13 is transmitted to the early warning module, and the early warning module sends a corresponding early warning signal to the reminder module to remind the staff that someone is operating and reduce the possibility of misoperation. At this time, the handle 4 is turned to drive the valve stem 13 and the connecting block 11 to rotate, and the valve stem 2 10 and the ball 9 are synchronously driven to rotate to the specified position, and then the handle 4 is released, the handle 4 and the valve stem 13 are reset, the self-locking rod 13 is extended, and the connecting block 11 is locked, so as to realize the self-locking function of the valve stem, and synchronously realize manual control and automatic early warning reminder; when electric control operation is required, the corresponding control signal is sent to the electric control module through the electric control button, and the electric control module controls the electromagnet 19 to work and generate magnetism. At this time, the magnetic ring 18 and the electromagnet 19 repel each other magnetically, and the magnetic ring 18 drives the connecting block 11 to move up synchronously. During the upward movement, the self-locking rod 13 shrinks to the inner cavity of the connecting block 11 to release the lock of the connecting block 11. At this time, the pressure sensor 17 receives the pressure signal applied by the valve stem 3 and transmits it to the early warning module. The early warning module sends a corresponding early warning signal to the reminder module to remind the staff that someone is operating. At the same time, the early warning module sends the corresponding The pressure signal is fed back to the electronic control module, and the electronic control module determines that the connecting block 11 moves up to the specified position, that is, the bevel gear ring 16 and the bevel gear 14 are meshed. At this time, the electronic control module controls the driving part 6 to drive the connecting block 11 to rotate synchronously, and the connecting block 11 controls the valve stem 10 and the ball 9 to rotate to the specified position. After the electronic control is completed, the electronic control module controls the electromagnet 19 to stop working. Due to the action of gravity, the connecting block 11 and the magnetic ring 18 are reset, and the self-locking rod 13 extends to lock the connecting block 11, thereby realizing the self-locking function of the valve stem, and synchronously realizing electronic control and automatic early warning reminders.

[0044] In this implementation, see Figure 4 and Figure 5The linkage assembly includes an active groove 21 opened on the side of the lower end of the valve stem 3 and corresponding to the self-locking rod 13, an inclined groove 23 opened obliquely on the side wall of the active groove 21, and a slider 22 installed on the self-locking rod 13. The slider 22 slides along the inclined groove 23, and the end of the self-locking rod 13 is located in the active groove 21. When the valve stem 13 and the self-locking rod 13 are misaligned, the slider 22 on the self-locking rod 13 moves along the inclined inclined groove 23, thereby controlling the self-locking rod 13 to move toward the inner cavity of the active groove 21 or away from the inner cavity of the active groove 21, thereby controlling the corresponding self-locking rod 13 to move laterally through the relative movement between the self-locking rod 13 and the valve stem 13; a limiting groove is provided at the front end of the self-locking rod 13, and a friction block 15 is fixed at the inner wall of the shell 12 and the corresponding position of the front end of the self-locking rod 13. When the self-locking rod 13 extends to self-lock the connecting block 11, the limiting groove at the front end of the self-locking rod 13 contacts the friction block 15, and the friction force between the two is large, which can provide a better locking effect.

[0045] Preferably, an elastic member 20 is installed in the inner cavity of the connecting block 11, and the elastic member 20 is located below the bottom of the valve stem 3, which can control the valve stem 3 to reset; there are multiple electromagnets 19, and the multiple electromagnets 19 are evenly distributed along the circumference of the magnetic ring 18, and the magnetic ring 18 and the connecting block 11 can be evenly controlled to move upward through the magnetism generated by the electromagnets 19, thereby improving the stability of the movement of the connecting block 11.

[0046] The second implementation method:

[0047] Figure 9-11As shown, unlike the first embodiment, the double-end self-sealing ball valve also includes a self-sealing mechanism, which includes a guide cavity 25 opened on the valve body 1 and a booster tank 8 installed on the valve body 1, and two self-sealing rings 24 are fixed with push rods 26 laterally plugged into the guide cavity 25 on the side away from the ball 9, the bottom of the booster tank 8 is connected to the guide cavity 25 through a three-way pipe 28, and a solenoid valve 29 is installed between the booster tank 8 and the three-way pipe 28. When the valve stem drives the ball 9 to rotate and close the ball valve, in order to achieve a better sealing effect, the self-sealing rings 24 on both sides of the ball 9 will fit closely with it to achieve a sealing effect. However, after long-term use, the opening edge on the ball 9 will scratch the self-sealing ring 24, causing wear on the self-sealing ring 24 and affecting the sealing of the ball valve; therefore, when it is necessary to control the rotation of the ball 9, the inner cavity of the guide cavity 25 is controlled by the three-way pipe 28 to generate negative pressure. At this time, the guide cavity 25 has an adsorption effect on the push rod 26 on the self-sealing ring 24, thereby driving the self-sealing ring 24 away from the ball 9, thereby reducing the friction between the self-sealing ring 24 and the ball 9 during the rotation process, and when the ball 9 rotates to the specified position, at this time, the high-pressure gas in the booster tank 8 is input into the inner cavity of the guide cavity 25, pushing the push rod 26 and the self-sealing ring 24 to move toward the ball 9, so that the self-sealing ring 24 is close to the ball 9 to seal it, which can reduce the wear of the self-sealing ring 24 during the use of the ball valve and increase the service life of the ball valve.

[0048] It is worth mentioning that the self-sealing mechanism also includes an air pump 7 installed on the valve body 1, and a three-way pipe 2 is installed at the air inlet of the air pump 7. One of the ports of the three-way pipe 2 is connected to the three-way pipe 1 28, and an electromagnetic valve 2 30 is installed between the two. The air outlet of the air pump 7 is connected to the boosting tank 8 through a pipeline. When the air pump 7 is working, the air outlet of the air pump 7 injects gas into the inner cavity of the boosting tank 8 through the pipeline to increase the internal pressure of the boosting tank 8, and controls whether the high-pressure gas in the boosting tank 8 enters the guide cavity 25 through the electromagnetic valve 1 29; when the electromagnetic valve 2 30 is in an open state, the three-way pipe 28 is negatively pressurized by the operation of the air pump 7, thereby reducing the inner cavity pressure of the guide cavity 25 and controlling the movement of the corresponding push rod 26 and the self-sealing ring 24.

[0049] In addition, an air pressure sensor 27 is installed inside the boost tank 8, and a sealing control module is also provided on the valve intelligent controller 5. The sealing control module is electrically connected to the early warning module, solenoid valve 1 29, solenoid valve 2 30, air pump 7 and air pressure sensor 27 respectively. When the ball valve is operating normally, the sealing control module controls the air pump 7 to work, and the air pump 7 injects air into the inner cavity of the boost tank 8. When the air pressure sensor 27 detects that the pressure in the inner cavity of the boost tank 8 reaches a preset value (the sealing control module is preset with the air pressure value of the inner cavity of the boost tank 8 in a high-pressure state), the sealing control module controls the air pump 7 to stop working; when the early warning module receives the pressure signal sent by the pressure sensor 17, the valve stem is preparing to control the rotation of the ball 9. At this time, the early warning module sends a control signal to the sealing control module, and the sealing control module controls the solenoid valve 2 30 to open and the air pump 7 to work. The operation of the air pump 7 generates a negative impact on the three-way pipe 1 28 and the inner cavity of the guide cavity 25. When the valve stem stops controlling the rotation of the ball 9, the pressure value sent by the pressure sensor 17 received by the early warning module is restored to the initial state, and the early warning module sends a control signal to the sealing control module, and the sealing control module simultaneously controls the electromagnetic valve 29 to open, the three-way pipe 28 to close, and the air pump 7 to stop working. The high-pressure gas in the booster tank 8 is output to the inner cavity of the guide cavity 25 through the three-way pipe 28, pushing the push rod 26 and the self-sealing ring 24 to move toward the ball 9, so that the self-sealing ring 24 is close to the ball 9 to seal it. Therefore, by flexibly controlling the position of the self-sealing ring 24 when the ball 9 moves and stops moving, the wear of the self-sealing ring 24 during the use of the ball valve can be reduced, and the service life of the ball valve can be increased.

[0050] Preferably, a plurality of push rods 26 are evenly fixed on the outer ring of the self-sealing ring 24, and the plurality of push rods 26 are transversely plugged into the guide cavity 25. A sealing ring is embedded in the outer ring of the push rods 26, which can control the pressure change in the guide cavity 25 and stably control the movement of the corresponding self-sealing ring 24 through the plurality of push rods 26.

[0051] The working method of the double-end self-sealing ball valve with valve stem self-locking function is as follows:

[0052] S1. Manual control: By holding the handle 4, the valve stem 3 is pressed down, and the self-locking rod 13 is retracted into the connection block 11 to release the lock of the connection block 11. By turning the handle 4, the ball 9 is controlled to rotate to a specified angle. At this time, the handle 4 is released, the handle 4 and the valve stem 3 are reset, and the self-locking rod 13 is extended to lock the connection block 11, and the valve stem is self-locked;

[0053] S2. Electric control: Send the corresponding control signal to the electric control module through the electric control button, the electric control module controls the electromagnet 19 to generate magnetism, the connection block 11 synchronously drives the self-locking rod 13 to move upward, during the upward movement, the self-locking rod 13 shrinks to the inner cavity of the connection block 11 to release the lock of the connection block 11, the connection block 11 moves up to the specified position, the driving member 6 drives the connection block 11 to rotate synchronously, the connection block 11 controls the valve stem 10 and the ball 9 to rotate to the specified position, after the electric control is completed, the electric control module controls the electromagnet 19 to stop working, the connection block 11 and the magnetic ring 18 are reset, the self-locking rod 13 extends to lock the connection block 11, and the valve stem is self-locked;

[0054] S3. Operation warning: When the positions of the valve stem 3 and the connecting block 11 move relative to each other, the pressure sensor 17 will receive the pressure signal applied by the valve stem 3 and transmit the pressure signal to the warning module. The warning module will send a corresponding warning signal to the reminder module to remind the staff that someone is operating.

[0055] In view of current practical needs, the protection scope of the above-mentioned implementation modes adopted by the present invention is not limited thereto, and various changes made within the knowledge scope of those skilled in the art without departing from the concept of the present invention still fall within the protection scope of the present invention.

Claims

1. Double-end self-sealing ball valve with valve stem self-locking function, characterized in that: It includes: Valve body (1); A ball (9) is installed in a valve body (1), wherein the valve body (1) is embedded with a self-sealing ring (24) that cooperates with an inlet of the ball (9) and an outlet of the ball (9); A valve stem, a handle (4) is mounted on the top of the valve stem, and the valve stem is divided into two sections, namely a valve stem 1 (3) connected to the handle (4) and a valve stem 2 (10) connected to the ball (9); A self-locking mechanism (2), the self-locking mechanism (2) being arranged at the connection between valve stem one (3) and valve stem two (10), the self-locking mechanism (2) comprising a shell (12) fixed to the valve body (1), a connecting block (11) vertically movable in the inner cavity of the shell (12), a plurality of self-locking rods (13) radially penetrating the connecting block (11) and extending outward, and a driving member (6) mounted on the shell (12), the end of the valve stem two (10) being plugged into the bottom of the connecting block (11) via a spline, and the valve stem one (3) being plugged into the top of the connecting block (11) via a spline; the valve stem one (3) and the self-locking mechanism (2) are connected to the valve body (1), and the self-locking mechanism (2) is ... A linkage assembly is provided between the rods (13) for controlling the lateral movement of the self-locking rod (13) by the axial movement of the valve stem (3); a bevel gear ring (16) is installed on the top of the connecting block (11); the output end of the driving member (6) extends into the housing (12) and is installed with a bevel gear (14) that can mesh with the bevel gear ring (16); a magnetic ring (18) is installed on the outer ring of the connecting block (11); an electromagnet (19) located below the magnetic ring (18) is installed in the housing (12); a pressure sensor (17) is installed in the inner cavity of the connecting block (11) and below the bottom of the valve stem (3); A valve intelligent controller (5), the valve intelligent controller (5) being mounted on the valve body (1), and being provided with an electric control module, an electric control button, an early warning module and a reminder module, the electric control module being electrically connected to the early warning module, the electric control button, the electromagnet (19) and the driving member (6), respectively, and the early warning module being electrically connected to the reminder module and the pressure sensor (17), respectively; The self-sealing mechanism comprises a guide cavity (25) provided on the valve body (1) and a booster tank (8) mounted on the valve body (1); a push rod (26) which is laterally plugged into the guide cavity (25) is fixed to the two self-sealing rings (24) on the side away from the sphere (9); the bottom of the booster tank (8) is connected to the guide cavity (25) via a three-way pipe (28); and a solenoid valve (29) is installed between the booster tank (8) and the three-way pipe (28); the self-sealing mechanism also comprises an air pump (29) mounted on the valve body (1) 7), a three-way pipe 2 is installed at the air inlet of the air pump (7), one of the ports of the three-way pipe 2 is connected to the three-way pipe 1 (28), and a solenoid valve 2 (30) is installed between the two; the air outlet of the air pump (7) is connected to the booster tank (8) through a pipeline, and an air pressure sensor (27) is installed inside the booster tank (8), and a sealing control module is also provided on the valve intelligent controller (5), and the sealing control module is electrically connected to the early warning module, the solenoid valve 1 (29), the solenoid valve 2 (30), the air pump (7) and the air pressure sensor (27) respectively; The linkage assembly comprises a movable groove (21) formed on the side surface of the lower end of the valve stem (3) and corresponding to the self-locking rod (13), an inclined groove (23) formed obliquely on the side wall of the movable groove (21), and a slider (22) mounted on the self-locking rod (13), wherein the slider (22) slides along the inclined groove (23), a limiting groove is provided at the front end of the self-locking rod (13), and a friction block (15) is fixed at a position corresponding to the inner wall of the housing (12) and the front end of the self-locking rod (13).

2. The double-end self-sealing ball valve with valve stem self-locking function according to claim 1, characterized in that: An elastic member (20) is installed in the inner cavity of the connection block (11), and the elastic member (20) is located below the bottom of the valve stem (3); there are a plurality of electromagnets (19), and the plurality of electromagnets (19) are evenly distributed along the circumference of the magnetic ring (18).

3. The double-end self-sealing ball valve with valve stem self-locking function according to claim 1, characterized in that: A plurality of push rods (26) are evenly fixed to the outer ring of the self-sealing ring (24), and the plurality of push rods (26) are all laterally plugged into the guide cavity (25); and a sealing ring is embedded in the outer ring of the push rod (26).

4. The working method of the double-end self-sealing ball valve with valve stem self-locking function according to any one of claims 1 to 3, characterized in that: The working steps are: S1. Manual control: By holding the handle (4), the valve stem (3) is pressed downward, and the self-locking rod (13) is retracted into the connecting block (11) to release the lock on the connecting block (11). By turning the handle (4), the ball (9) is controlled to rotate to a specified angle. At this time, the handle (4) is released, the handle (4) and the valve stem (3) are reset, and the self-locking rod (13) is extended to lock the connecting block (11), thereby self-locking the valve stem; S2. Electric control: a corresponding control signal is sent to the electric control module through the electric control button, the electric control module controls the electromagnet (19) to generate magnetism, the connecting block (11) synchronously drives the self-locking rod (13) to move upward, during the upward movement, the self-locking rod (13) contracts to the inner cavity of the connecting block (11) to release the lock of the connecting block (11), the connecting block (11) moves upward to a specified position, the driving member (6) drives the connecting block (11) to rotate synchronously, the connecting block (11) controls the valve stem (10) and the ball (9) to rotate to the specified position, after the electric control is completed, the electric control module controls the electromagnet (19) to stop working, the connecting block (11) and the magnetic ring (18) are reset, the self-locking rod (13) extends to lock the connecting block (11), and the valve stem is self-locked; S3. Operation warning: When the positions of the valve stem 1 (3) and the connecting block (11) move relative to each other, the pressure sensor (17) receives the pressure signal applied by the valve stem 1 (3) and transmits the pressure signal to the warning module. The warning module sends a corresponding warning signal to the reminder module to remind the staff that someone is operating.

Images