Locking correction dial forced seal ball valve

Abstract

The application relates to a locking correction knob forced sealing ball valve, which comprises a first valve cover 10, a driving shaft 20, a first valve flap driving part 30 and a second valve flap driving part 40, the first valve flap driving part is provided with a locking knob 50, the locking knob is provided with a locking body guide hole 51, a locking body 52 is arranged in the locking body guide hole, the locking knob is provided with a locking correction block 53, the first valve cover is provided with a locking correction groove 11, and after the first valve flap driving part rotates to a closed position, the locking correction block moves into the locking correction groove along with the first valve flap driving part. The locking correction block and the locking correction groove are matched, the valve flap driving part has good positioning and retaining effects, the valve flap is accurately pressed against the valve seat, the sealing effect is guaranteed, and the service life of the structure is prolonged. The valve flap driving part is provided with a balance correction block, the movement and positioning of the valve flap driving part are more balanced, and the use effect of the forced sealing ball valve is improved.

Description

Technical Field

[0001] This invention relates to forced sealing valves, and more particularly to a forced sealing ball valve with a locking and corrective lever. Background Technology

[0002] DBB forced-seal valves possess outstanding sealing performance, enabling online sealing detection under pressure conditions when the valve is closed, ensuring reliable valve closure. Chinese invention patent (application number 2021217521001) discloses a DBB forced-seal ball valve drive structure. In this structure, the valve ball includes a tension screw, a first valve disc drive component, a second valve disc drive component, and a valve disc. When the valve is closed, the tension screw drives the first and second valve disc drive components to separate vertically, pushing the valve disc to press against the valve seats at both ends of the valve, achieving forced sealing. Due to accumulated machining tolerances, deviations may occur in the gaps between the valve seats and the valve disc on both sides. To ensure a good seal, an appropriate radial clearance needs to be reserved between the rotating shaft holes of the first and second valve disc drive components, allowing the valve ball to offset appropriately to compensate for the deviation and achieve a reliable seal. A problem with this structure is that the valve ball is in a state of free swaying to some extent. In particular, when the valve ball is in the closed position, the position of the first valve disc drive component is maintained solely by the locking body being embedded in the locking groove. In order to ensure that the locking body can reliably be embedded in and disengaged from the locking groove, a certain gap is left between the locking groove and the locking body. This causes the valve disc to not be accurately aligned with the valve seat, resulting in poor sealing surface pressure contact and increased wear on the components.

[0003] Furthermore, in the original design, the valve ball is driven by the valve stem and locking body on one side of the first valve disc drive when rotating. This eccentric rotation of the valve ball can cause the valve disc to not accurately align with the valve seat. Moreover, in the valve open position, the first valve disc drive is only held open by a travel limit block on one side, resulting in poor stability and causing problems such as abnormal noise and increased flow resistance in actual pipeline applications. Summary of the Invention

[0004] The purpose of this invention is to provide a locking and corrective block forced sealing ball valve, which enables the forced sealing ball valve to have stable opening and closing performance.

[0005] To achieve the above objectives, the technical solution of the present invention is: a locking and correcting paddle block forced sealing ball valve, comprising a first valve cover 10, a drive shaft 20, a first valve disc drive 30, and a second valve disc drive 40. The first valve disc drive is provided with a locking paddle block 50, the locking paddle block is provided with a locking body guide hole 51, a locking body 52 is provided in the locking body guide hole, the locking paddle block is provided with a locking and correcting block 53, and the first valve cover is provided with a locking and correcting groove 11. After the first valve disc drive is rotated to the closed position, the locking and correcting block moves with the first valve disc drive and enters the locking and correcting groove.

[0006] Furthermore, in order to accurately hold the first valve disc drive 30 in the closed position, the drive shaft 20 drives the first valve disc drive 30 to rotate within the rotational stroke of the first valve disc drive 30; after the first valve disc drive 30 rotates to the closed position, the drive shaft 20 continues to rotate in the valve closing direction, driving the first valve disc drive 30 to move axially along the drive shaft, so that the locking correction block 53 moves into the locking correction groove 11; the locking correction block 53 slides into the locking correction groove 11.

[0007] Furthermore, in order to enable the first valve disc drive 30 to shift left and right along the flow channel direction and compensate for the gap deviation between the valve discs on both sides and the valve seat, the sliding mating surface of the locking correction groove 11 and the locking correction block 53 is parallel to the valve flow channel direction.

[0008] Furthermore, one possible association structure between the first valve cover and the locking lever is as follows: the first valve cover is provided with a locking lever annular groove 12, the two ends of the locking lever annular groove 12 are the opening end 12a and the closing end 12b of the locking lever annular groove, the locking correction groove 11 is provided at the closing end 12b of the locking lever annular groove, the outer wall 54 of the locking lever rotates along the locking lever annular groove 12, the inner wall 55 of the locking lever rotates along the drive shaft 20, and the locking correction block 53 protrudes from the outer wall 54 of the locking lever.

[0009] Furthermore, in order to realize the opening, closing and forced sealing of the valve, the locking block annular groove 12 is provided with a locking groove 13, and the drive shaft 20 is provided with a drive groove 21. The drive groove 21 is an arc-shaped groove corresponding to the locking body 52. ​​The locking body 52 is embedded in the drive groove 21. When the drive shaft 20 drives the first valve disc drive member to rotate to the closed position through the locking body 52 and the locking block 50, the locking block (50) rotates to the position that contacts the closed end (12b) of the block annular groove, and the locking body 52 moves to the position corresponding to the locking groove 13. When the drive shaft 20 continues to rotate in the valve closing direction, the drive shaft 20 rotates relative to the locking block 50, pushing the locking body 52 out of the drive groove 21 and embedded in the locking groove 13. When the first valve disc drive member rotates to the open position, the locking block 50 rotates to the position that contacts the open end 12a of the block annular groove.

[0010] Furthermore, in order to better ensure that the first valve disc drive 30 is accurately held in the closed position, the first valve disc drive 30 is provided with a balancing correction block 60. The balancing correction block 60 rotates with the first valve disc drive 30. The first valve cover is provided with a balancing correction block annular groove 15. The two ends of the balancing correction block annular groove 15 are respectively the opening end 15a and the closing end 15b of the balancing correction block annular groove. The balancing correction block 60 rotates within the balancing correction block annular groove 15. The closing end 15b of the balancing correction block annular groove is provided with a balancing correction groove 17. The balancing correction block 60 slides with the balancing correction groove 17. The sliding contact surface between the balancing correction groove 17 and the balancing correction block 60 is parallel to the valve flow channel direction.

[0011] Furthermore, when the first valve disc drive 30 rotates to the closed position, the balance correction block 60 rotates to a position that contacts the closed end 15b of the correction block annular groove, and the first valve disc drive 30 drives the balance correction block 60 into the balance correction groove 17 in the closed position; when the first valve disc drive rotates to the open position, the balance correction block (60) rotates to a position that contacts the open end (15a) of the correction block annular groove.

[0012] Furthermore, in one mounting structure for the valve stem and drive shaft, the valve stem 80 is disposed on one side of the first valve disc drive member 30, the valve stem 80 passes through the first valve cover 10 and connects to the drive shaft 20, the drive shaft 20 rotates synchronously with the valve stem 80, the drive shaft 20 drives the tension screw 72 to rotate synchronously, and the tension screw 72 is threadedly connected to the first valve disc drive member 30 and the second valve disc drive member 40.

[0013] Furthermore, to achieve online maintenance of the valve, another valve stem and drive shaft mounting structure is provided, in which the valve stem 80 is disposed on one side of the second valve disc drive member 40, the valve stem 80 passes through the second valve cover 1a and connects to the tension screw 72, the tension screw 72 is connected to the drive shaft 20, the valve stem 80 drives the tension screw 72 and the drive shaft 20 to rotate synchronously, and the tension screw 72 is threadedly connected to the first valve disc drive member 30 and the second valve disc drive member 40.

[0014] The beneficial effects of this invention are as follows: The use of a locking paddle with a locking correction block, which cooperates with the locking correction groove, ensures good positioning and retention of the valve disc drive component. This allows the valve disc to accurately engage with the valve seat, guaranteeing a sealing effect and improving the service life of the structure. Furthermore, the valve disc drive component is equipped with a balance correction block, making its movement and positioning more balanced and improving the performance of the forced-seal ball valve.

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the ball valve of the present invention; Figure 2 This is a structural diagram of the first valve cover, drive shaft, first valve disc drive component, second valve disc drive component, locking block, and balance correction block of the present invention. Figure 3 This is an exploded view of the structure of the first valve cover, drive shaft, locking block, and balance correction block of the valve of the present invention; Figure 4 yes Figure 3 View from direction A; Figure 5 This is an end view of the first valve cover of the present invention; Figure 6 This is a cross-sectional view of the valve body, valve seat, and valve cover of the present invention, showing the positions of the valve cover, valve seat, and flow channel; Figure 7 This is a plan view of the valve of the present invention in the open state; Figure 8 This is a planar schematic diagram of the first valve disc drive component of the present invention rotating to the closed position; Figure 9 This is a planar schematic diagram of the first valve disc drive component of the present invention continuing to rotate in the closing direction, and the locking body disengaging from the drive shaft; Figure 10 This is a planar schematic diagram of the first valve disc drive component continuing to rotate in the closing direction, the first valve disc drive component and the second valve disc drive component separating and driving the sealing valve disc. Figure 11This is a schematic diagram of the structure of the present invention, in which the locking block and the balance correction block are provided with a block through groove, allowing the valve stem to exceed the stroke by more than one revolution; Figure 12 This is a schematic diagram of the valve of the present invention in a forced sealing state; Figure 13 This is a structural diagram of the present invention, in which the valve stem is disposed on one side of the second valve disc drive member and the drive shaft is disposed on one side of the first valve disc drive member. Figure 14 yes Figure 13 Exploded view of the structure of the first valve cover, second valve cover, valve stem, drive shaft, first valve disc drive component, second valve disc drive component, locking block, and balance correction block; Figure 15 yes Figure 14 View B. Detailed Implementation

[0017] Example 1: like Figures 1 to 12 A locking and corrective lever forced sealing ball valve includes a first valve cover 10, a drive shaft 20, a first valve disc drive 30, and a second valve disc drive 40. A valve stem 80 passes through the first valve cover 10 and connects to the drive shaft 20; the drive shaft 20 rotates synchronously with the valve stem 80. In practice, the drive shaft 20 and the valve stem 80 can be made as a single component.

[0018] Along the flow path of the valve, valve seats 71 are provided at both ends of the valve body 70. The valve stem 80 and drive shaft 20 are located on one side of the first valve disc drive 30. The drive shaft 20 is connected to a tension screw 72, which rotates synchronously with the drive shaft 20 (and also with the valve stem 80). The tension screw 72 is threadedly connected to the first valve disc drive 30 and the second valve disc drive 40. The first and second valve disc drive components are connected to a sealing valve disc 73. The first and second valve disc drive components drive the sealing valve disc 73 to move via a dovetail groove structure 74. The sealing valve disc 73 presses against the valve seat 71, achieving forced sealing. The tension screw 72 has a spherical structure with a flow path 75 at its center. The first valve disc drive 30 and the second valve disc drive 40 rotate within a 90° rotational stroke between the valve's open and closed positions. Since the valve disc 73 is connected to the first valve disc drive 30 and the second valve disc drive 40 through the inclined dovetail groove structure 74, the first valve disc drive 30 and the second valve disc drive 40 will rotate synchronously.

[0019] The first valve disc drive component is equipped with a locking block 50. The lower end of the locking block 50 is provided with an arc-shaped mounting plate 56. The first valve disc drive component 30 is equipped with a locking block mounting groove 31. The arc-shaped mounting plate 56 is inserted into and fixed within the locking block mounting groove 31, so that the locking block 50 is mounted on the first valve disc drive component. Figure 3 As shown.

[0020] The locking block 50 has a locking body guide hole 51, and a locking body 52 is provided in the locking body guide hole 51. The locking body 52 is a cylinder with spherical ends. The diameter of the locking body 52 is clearance-fitted with the locking body guide hole 51, so that the locking body 52 can move in the locking body guide hole 51.

[0021] The locking lever 50 is provided with a locking correction block 53, which protrudes from the outer wall 54 of the locking lever.

[0022] The first valve disc drive component 30 is also provided with a balancing correction block 60. The lower end of the balancing correction block 60 is provided with an arc-shaped mounting plate 61. The first valve disc drive component 30 is provided with a balancing block mounting groove 32. The arc-shaped mounting plate 61 is inserted into and fixed within the balancing block mounting groove 32, so that the balancing correction block 60 is mounted on the first valve disc drive component. Figure 3 As shown.

[0023] The locking block 50 and the balancing correction block 60 rotate with the first valve disc drive 30.

[0024] The first valve cover 10 has a locking block annular groove 12. The two ends of the locking block annular groove 12 are the opening end 12a and the closing end 12b, respectively. The closing end of the locking block annular groove has a locking correction groove 11, which is a slot penetrating the outer wall of the first valve cover. The two side walls of the locking correction groove 11 are parallel to the valve flow channel direction, i.e., parallel to the center line C of the valve flow channel. Figure 6 As shown. The outer wall 54 of the locking block rotates along the locking block annular groove 12, and the inner wall 55 of the locking block rotates along the drive shaft 20.

[0025] The first valve cover also has a balancing and correcting block annular groove 15, within which the balancing and correcting block 60 rotates. The two ends of the balancing and correcting block annular groove are the opening end 15a and the closing end 15b, respectively. The closing end 15b is provided with a balancing and correcting groove 17. The two side walls of the balancing and correcting groove 17 are parallel to the valve flow direction, such as... Figure 6 As shown.

[0026] A locking groove 13 is provided within the locking block annular groove 12, and the locking groove 13 is an arc-shaped groove corresponding to the locking body 52. ​​The drive shaft 20 is provided with a drive groove 21, which is also an arc-shaped groove corresponding to the locking body 52. ​​When the first valve disc drive member 30 is in the open position (i.e., the valve is open) and during its rotation stroke, the locking body 52 is embedded in the drive groove 21 of the drive shaft, and the locking body 52 moves in contact with the locking block annular groove 12. The drive groove 21 of the drive shaft actuates the locking body 52, the locking body 52 actuates the locking block 50, and the locking block 50 drives the first valve disc drive member 30 to rotate. During the rotation stroke of the first valve disc drive member 30, the locking correction block 53 rotates along the lower edge of the first valve cover.

[0027] like Figure 9 and Figure 10 As shown, when the first valve disc drive 30 rotates to the closed position, the locking block 50 rotates to a position contacting the closed end of the locking block annular groove, and the locking block 50 corresponds to the locking correction groove 11 of the annular groove; simultaneously, the balancing correction block 60 also rotates to a position contacting the closed end 15b of the correction block annular groove. The locking block 50 and / or the balancing correction block 60 will contact the first valve cover structure, stop moving, and cause the first valve disc drive 30 to stop rotating and remain in the closed position. At this time, the locking body 52 also moves to the position corresponding to the locking groove 13.

[0028] like Figure 11 , Figure 12 As shown, when the drive shaft 20 continues to rotate in the valve closing direction, it pushes the locking body 52 out of the drive groove 21 and into the locking groove 13. Figure 13 , Figure 14 As shown, during the continuous rotation of the drive shaft 20 along the valve closing direction, the drive shaft 20 drives the tension screw 72 to drive the first valve disc drive 30 and the second valve disc drive 40 through the thread. The first and second valve disc drive components move in a direction of separation from each other, driving the sealing valve disc 73 to move towards the valve seat through the inclined dovetail groove structure 74. The first valve disc drive 30 moves towards the first valve cover 10, driving the locking correction block 53 of the locking lever into the locking correction groove 11, and driving the balance correction block 60 into the balance correction groove 17. The entrance of the locking correction groove 11 is provided with a bevel 14, which can guide the locking correction block 53 into the locking correction groove 11. The balance correction block 60 is provided with a chamfer 62, which can allow the balance correction block 60 to smoothly enter the balance correction groove 17.

[0029] The locking and correcting block 53 slides into the locking and correcting groove 11 (clearance fit), and the balancing and correcting block 60 slides into the balancing and correcting groove 17. The locking block 50 and the balancing and correcting block 60 restrict the rotation of the first valve disc drive 30 on both sides, ensuring that the first valve disc drive 30 is accurately held in the closed position. In the original technical solution, only the locking body 52 controls the first valve disc drive 30, but there is a gap between the locking body 52 and the locking groove 13, which prevents the first valve disc drive 30 from being accurately held in the closed position, affecting the accurate alignment of the sealing valve disc 73 with the valve seat 71.

[0030] As the drive shaft rotates in the closing direction, it ultimately drives the sealing valve disc 73 to press against the valve seat 71, achieving forced sealing of the valve. Figure 12 As shown.

[0031] Due to accumulated tolerances caused by factors such as processing and manufacturing, the gaps between the two sealing valve discs and the valve seats are not completely equal. After one sealing valve disc contacts the valve seat, the drive shaft continues to rotate, and the valve disc on the first contact side will push the valve ball (including the tensioning screw 72, the first valve disc drive 30, the second valve disc drive 40, and the valve disc 73) towards the other valve seat until the other valve disc contacts the valve seat. In this invention, the two side walls of the locking correction groove 11 are parallel to the valve flow direction, that is, the sliding mating surface of the locking correction groove 11 and the locking correction block 53 is parallel to the valve flow direction; and the two side walls of the balancing correction groove 17 are parallel to the valve flow direction, that is, the sliding mating surface of the balancing correction groove 17 and the balancing correction block 60 is parallel to the valve flow direction, so that the first valve disc drive 30 (including the second valve disc drive 40) can shift left and right along the flow direction to compensate for the gap deviation. At the same time, the locking correction groove 11 and the balancing correction groove 17 restrict the deflection of the valve ball in other directions, so that the valve ball maintains an accurate working position.

[0032] The drive shaft 20 is provided with an opening lever 22, the balance correction block 60 is provided with an inner surface 63, and the locking lever 50 is provided with a lever through groove 57. When the first valve disc drive member 30 rotates with the drive shaft and moves toward the first valve cover, the opening lever 22 can pass over the balance correction block 60 from the inner surface 63 and over the locking lever 50 from the lever through groove 57, which increases the closing rotation stroke of the drive shaft 20 and makes the drive shaft have sufficient rotation stroke to achieve forced sealing of the valve.

[0033] During the valve's operation from closed to open, the drive shaft 20 rotates in the opening direction. The drive shaft 20, via a thread, drives the first valve disc drive 30 and the second valve disc drive 40 to move closer to each other. The first and second valve disc drive components, through the inclined dovetail groove structure 74, cause the sealing valve disc 73 to disengage from the valve seat, releasing the valve from its forced sealing state. At this time, due to the restraining effect of the locking correction block, the balancing correction block, and / or the locking body 52 on the first valve disc drive 30, the first valve disc drive 30 will not disengage from the closed position.

[0034] When the drive shaft rotates to the point where the opening lever 22 touches the locking lever 50, the position of the drive groove 21 of the drive shaft corresponds to the locking body 52. ​​The opening lever 22 moves the locking lever 50, causing the locking lever 50 (along with the first valve disc drive member 30) to rotate in the opening direction. Under the pushing action of the locking body guide hole 51 and the locking groove 13, the locking body 52 will disengage from the locking groove 13 and embed into the drive groove 21, releasing the constraint on the first valve disc drive member 30. Subsequently, the opening lever 22 drives the first valve disc drive member 30 to rotate in the opening direction through the locking lever 50, and the second valve disc drive member 40 and the two sealing valve discs 73 also rotate synchronously.

[0035] When the first valve disc drive 30 rotates to the open position, the locking block 50 rotates to a position contacting the open end 12a of the block annular groove. Simultaneously, the balancing correction block 60 also rotates to a position contacting the open end 15b of the correction block annular groove. The locking block 50 and / or the balancing correction block 60 will contact the first valve cover structure, stopping their movement and preventing the first valve disc drive 30 from rotating further, thus stopping it in the open position. The opening block 22 of the drive shaft 20 will press against the locking block 50, and the locking block 50 and the balancing correction block 60 will lock the first valve disc drive 30 in position on both sides.

[0036] Subsequently, the valve stem 80 is fixed in position by the valve stem drive mechanism (such as a worm gear box, electric actuator, pneumatic actuator, etc., the drive mechanism has a self-locking function), and the drive shaft 20 is fixed accordingly, so that the first valve disc drive 30 and the second valve disc drive 40 are stably held in the open position, the tension screw 72 is also in the open position, and the valve flow passage 75 is opened.

[0037] This invention employs a locking paddle block and a balancing correction block, both equipped with locking and correcting blocks. The locking and correcting blocks cooperate with the locking and correcting grooves to ensure the valve disc drive component has excellent positioning and retention, allowing the valve disc to accurately engage with the valve seat. This predictable and controllable valve ball posture reduces the randomness of valve ball posture adjustment, lowers sealing difficulty, reduces sealing torque, minimizes valve seat wear caused by valve ball posture adjustment, ensures sealing performance, and extends structural lifespan. In the open position, it can restrain valve ball wobbling, reducing flow resistance, minimizing abnormal noise, and extending component lifespan.

[0038] Example 2: like Figures 13 to 15 A locking and correcting paddle forcibly sealing ball valve, this embodiment is a structural replacement of embodiment one.

[0039] In this embodiment, the valve stem 80 and the first valve disc drive 30 are respectively disposed on both sides of the valve body 70. A first valve cover 10 and a second valve cover 1a are respectively disposed on both sides of the valve body 70.

[0040] The valve stem 80 is located on one side of the second valve disc drive 40. The valve stem 80 passes through the second valve cover 1a and is connected to the tensioning screw 72. The valve stem 80 and the tensioning screw 72 are connected by four pins 81. The tensioning screw 72 is connected to the drive shaft 20 by four pins 82. The valve stem 80 drives the tensioning screw 72 and the drive shaft 20 to rotate synchronously.

[0041] The tensioning screw 72 is threadedly connected to the first valve disc drive 30 and the second valve disc drive 40. The second valve disc drive 40 is located on the second valve cover 1a (and valve stem 80).

[0042] The first valve disc drive member 30 is located on one side of the first valve cover 10 (and drive shaft 20). Similarly, the first valve disc drive member 30 is provided with a locking block 50, a locking body 52, and a balance correction block 60. The first valve cover 10 is provided with a locking correction groove 11, a locking block annular groove 12, a locking groove 13, a balance correction block annular groove 15, and a balance correction groove 17.

[0043] In the forced sealing ball valve structure of this valve, the first valve cover 10, locking block 50, locking body 52 and balance correction block 60 will wear due to mechanical movement and require maintenance.

[0044] In the first embodiment, when the valve is in the forced-seal closed state, the valve stem needs to be fixed in position by the drive mechanism. The valve stem cannot be disassembled, and therefore the first valve cover, locking block 50, locking body 52, and balancing correction block 60 cannot be disassembled. In this embodiment, the valve stem 80 and the first valve disc drive 30 are respectively located on both sides of the valve body 70. The valve stem 80 passes through the second valve cover 1a and connects to the tension screw 72. When the valve is in the forced-seal state, the first valve cover 10, drive shaft 20, locking block 50, locking body 52, and balancing correction block 60 can be disassembled without affecting the state of the valve stem, tension screw, first valve disc drive 30, second valve disc drive 40, and two sealing valve discs 73. This enables online maintenance and repair of the valve, significantly improving the practicality and reliability of the forced-seal ball valve.

Claims

1. A locking and correcting lever forced sealing ball valve, comprising a first valve cover (10), a drive shaft (20), a first valve disc drive (30), and a second valve disc drive (40), characterized in that, The first valve disc drive is provided with a locking block (50), the locking block is provided with a locking body guide hole (51), a locking body (52) is provided in the locking body guide hole, the locking block is provided with a locking correction block (53), and the first valve cover is provided with a locking correction groove (11). Within the rotational stroke of the first valve disc drive (30), the drive shaft (20) drives the first valve disc drive (30) to rotate; after the first valve disc drive rotates to the closed position, the drive shaft (20) continues to rotate in the valve closing direction, driving the first valve disc drive (30) to move along the axial direction of the drive shaft, so that the locking correction block (53) moves into the locking correction groove (11); the locking correction block (53) and the locking correction groove (11) are in sliding engagement; The sliding mating surfaces of the locking correction groove (11) and the locking correction block (53) are parallel to the valve flow channel direction.

2. The locking and correcting lever forced sealing ball valve according to claim 1, characterized in that, The first valve cover is provided with a locking block annular groove (12). The two ends of the locking block annular groove (12) are the opening end (12a) and the closing end (12b) of the locking block annular groove, respectively. The locking correction groove (11) is provided at the closing end (12b) of the locking block annular groove. The outer wall (54) of the locking block rotates along the locking block annular groove (12), and the inner wall (55) of the locking block rotates along the drive shaft (20). The locking correction block (53) protrudes from the outer wall (54) of the locking block.

3. The locking and correcting lever forced sealing ball valve according to claim 2, characterized in that, The locking block annular groove (12) is provided with a locking groove (13), and the drive shaft (20) is provided with a drive groove (21). The drive groove (21) is an arc-shaped groove corresponding to the locking body (52). The locking body (52) is embedded in the drive groove (21). When the drive shaft (20) drives the first valve disc drive member to rotate to the closed position through the locking body (52) and the locking block (50), the locking block (50) rotates to the position that contacts the closed end (12b) of the block annular groove, and the locking body (52) moves to the position corresponding to the locking groove (13). When the drive shaft (20) continues to rotate in the valve closing direction, the drive shaft (20) rotates relative to the locking block (50), pushing the locking body (52) out of the drive groove (21) and embedded in the locking groove (13). When the first valve disc drive member rotates to the open position, the locking block (50) rotates to the position that contacts the open end (12a) of the block annular groove.

4. The locking and correcting paddle forcibly sealing ball valve according to claim 1, characterized in that, The first valve disc drive (30) is provided with a balancing correction block (60), which rotates with the first valve disc drive. The first valve cover is provided with a balancing correction block annular groove (15), with the two ends of the balancing correction block annular groove (15) being the opening end (15a) and the closing end (15b) of the balancing correction block annular groove, respectively. The balancing correction block (60) rotates within the balancing correction block annular groove (15), and the closing end (15b) of the balancing correction block annular groove is provided with a balancing correction groove (17). The balancing correction block (60) and the balancing correction groove (17) are in sliding fit, and the sliding fit surface of the balancing correction groove (17) and the balancing correction block (60) is parallel to the valve flow channel direction.

5. The locking and correcting block forced sealing ball valve according to claim 4, characterized in that, When the first valve disc drive (30) rotates to the closed position, the balance correction block (60) rotates to a position that contacts the closed end (15b) of the correction block annular groove, and the first valve disc drive (30) drives the balance correction block (60) into the balance correction groove (17) in the closed position; when the first valve disc drive rotates to the open position, the balance correction block (60) rotates to a position that contacts the open end (15a) of the correction block annular groove.

6. The locking and correcting paddle forced sealing ball valve according to claim 1, characterized in that, The valve stem (80) is located on one side of the first valve disc drive (30). The valve stem (80) passes through the first valve cover (10) and is connected to the drive shaft (20). The drive shaft (20) rotates synchronously with the valve stem (80). The drive shaft (20) drives the tension screw (72) to rotate synchronously. The tension screw (72) is threadedly connected to the first valve disc drive (30) and the second valve disc drive (40).

7. The locking and correcting lever forced sealing ball valve according to claim 1, characterized in that, The valve stem (80) is located on one side of the second valve disc drive (40). The valve stem (80) passes through the second valve cover (1a) and is connected to the tension screw (72). The tension screw (72) is connected to the drive shaft (20). The valve stem (80) drives the tension screw (72) and the drive shaft (20) to rotate synchronously. The tension screw (72) is threadedly connected to the first valve disc drive (30) and the second valve disc drive (40).

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