A high sealing ball valve

Abstract

The application relates to a high-sealing ball valve, belonging to the field of ball valves, which comprises a valve body, a valve rod, a ball, a sealing mechanism, a rotating mechanism and a moving mechanism; the ball and the rotating mechanism are arranged in the valve body; the valve rod is arranged on the valve body, and the rotating mechanism is arranged on the valve rod; the valve rod drives the ball to rotate through the rotating mechanism; the sealing mechanism comprises a sealing ring, and the sealing ring abuts against the ball; the moving mechanism comprises a connecting piece, a boss and a fastening block; the boss and the fastening block are arranged on the rotating mechanism, and the connecting piece is arranged on the sealing ring; the rotating mechanism drives the boss to abut against and rotate with the connecting piece, so that the connecting piece drives the sealing ring to move; when the connecting piece abuts against the boss, the rotating mechanism drives the fastening block to rotate relative to the boss, so that the connecting piece drives the sealing ring to move towards the ball. The application has the effects of improving the sealing performance of the ball valve and prolonging the service life.

Description

Technical Field

[0001] This application relates to the field of ball valves, and more particularly to a high-sealing ball valve. Background Technology

[0002] A ball valve is a type of valve that controls the flow of fluid by rotating a ball with a through hole; a simple 90-degree rotation is sufficient to open or close it. Currently, to ensure a tight seal, the ball and the sealing element within the valve body are in close contact. However, in practice, the rotation of the ball can wear down the sealing element, thus affecting the valve's sealing performance and service life.

[0003] In related technologies, such as Chinese patent CN120608967B, a high-sealing ball valve is provided, comprising a ball, a sealing mechanism, and a fastening mechanism. The sealing mechanism includes a second spring and a sealing ring, while the fastening mechanism includes a connecting rod, a boss, and a circular plate. When the ball rotates until the connecting rod disengages from the boss, the sealing ring, driven by the second spring, abuts against the ball, at which point the sealing ring and ball form an elastic seal. When the ball rotates until the connecting rod moves to the highest point of the boss's arc surface, the sealing ring and ball achieve maximum tightness, resulting in a rigid seal. This patent reduces friction between the ball and the sealing ring during rotation by switching between elastic and rigid seals, while ensuring a tight seal during use.

[0004] However, as the usage time increases, the sealing ring will wear out. When the connecting rod abuts at the highest point of the boss's arc surface, the sealing ring moves to its maximum distance towards the ball. At this time, the wear of the sealing ring reduces the fit between the ball and the sealing ring, affecting the sealing performance of the ball valve and reducing its service life. Summary of the Invention

[0005] In order to improve the sealing performance of ball valves and extend their service life, this application provides a high-sealing ball valve.

[0006] This application provides a high-sealing ball valve, which adopts the following technical solution:

[0007] A high-sealing ball valve includes a valve body, a valve stem, a ball, a sealing mechanism, a rotating mechanism, and a moving mechanism; the ball and the rotating mechanism are both disposed within the valve body. The valve stem passes through the valve body, and the rotating mechanism is disposed on the valve stem; the valve stem drives the ball to rotate through the rotating mechanism; The sealing mechanism includes a sealing ring, which abuts against the sphere; The moving mechanism includes a connector, a boss, and a fastening block; the boss and the fastening block are both disposed on the rotating mechanism, and the connector is disposed on the sealing ring; the rotating mechanism drives the boss to abut against the connector and rotate, so that the connector drives the sealing ring to move; When the connector abuts against the boss, the rotating mechanism drives the fastening block to rotate relative to the boss, causing the connector to drive the sealing ring to move closer to the sphere.

[0008] By adopting the above technical solution, the positional changes of the boss and fastening block as the rotating mechanism rotates drive the connecting parts to produce linear displacement, thereby pushing the sealing ring to press the ball. Through the cooperative arrangement of the boss and fastening block, not only is a basic rigid sealing pressure achieved, but the fastening block also provides additional adjustment or compensation stroke. This reduces the possibility of sealing failure caused by sealing ring wear due to the inability of a single boss to compensate for it in existing technologies, thus improving the sealing performance of the ball valve and extending its service life.

[0009] Optionally, the rotating mechanism includes a connecting seat, which is rotatably connected to the valve body; the valve stem drives the ball to rotate through the connecting seat, and the boss is disposed on the connecting seat.

[0010] By adopting the above technical solution, the connecting seat ensures the stable transmission of valve stem torque to the ball and provides a stable installation reference for the boss, ensuring that the boss rotates synchronously with the ball, thereby achieving precise coordination between the sealing action and the valve opening and closing action.

[0011] Optionally, the rotating mechanism further includes a fastening rotating disk, which is rotatably connected to the valve body, and the fastening block is disposed on the fastening rotating disk; The fastening rotating disk rotates relative to the connecting seat, causing the fastening block to drive the connecting member to move.

[0012] By adopting the above technical solution, when the sealing ring wears down due to long-term use, causing the connector to be unable to fit tightly against the ball at the highest point of the boss, the fastening rotating disc is controlled to rotate relative to the connecting seat. The fastening block continues to push the connector towards the ball, effectively compensating for the wear gap of the sealing ring and improving the sealing performance of the ball valve.

[0013] Optionally, the rotating mechanism further includes a first elastic element, which is sleeved on the valve stem; a driving block is provided on the valve stem, and the driving block passes through the fastening rotating disk and is inserted into the connecting seat; After the fastening rotating disk rotates relative to the connecting seat, the first elastic element drives the driving block to press against the connecting seat.

[0014] By adopting the above technical solution, after the fastening rotating disk and the connecting seat rotate relative to each other, the elastic force of the first elastic element causes the driving block to press against the connecting seat, thereby improving the reliability of the relative fixation of the position of the fastening rotating disk and the connecting seat under the action of the friction force between the driving block and the connecting seat.

[0015] Optionally, the sealing mechanism includes a second elastic element, a mounting ring, a sealing ring, and a push rod; the connecting member is disposed on the mounting ring, and the mounting ring abuts against the sealing ring; the push rod is disposed on the mounting ring, and the second elastic element is disposed between the valve body and the push rod; When the connector disengages from the boss, the second elastic element drives the mounting ring to move, causing the sealing ring to press against the sphere.

[0016] By adopting the above technical solution, during the rotation of the ball, when the connecting piece disengages from the boss, the elastic force of the second elastic element pushes the sealing ring to abut against the ball, thereby achieving elastic sealing of the sealing ring and reducing friction and wear between the sealing ring and the ball.

[0017] Optionally, the connector includes a connecting rod and a movable block, the movable block being connected to the mounting ring via the connecting rod; the movable block abutting against the boss or the fastening block.

[0018] By adopting the above technical solution, a rigid seal between the sealing ring and the sphere can be achieved when the movable block abuts against the boss. The contact between the movable block and the fastening block allows for further movement of the sealing ring, thereby compensating for wear on the sealing ring.

[0019] Optionally, a detection element is also included, which is disposed between the connecting rod and the movable block, and is used to detect the pressure between the sealing ring and the ball.

[0020] By adopting the above technical solution, the detection component achieves intelligent monitoring of the sealing status. The detection component can provide real-time feedback on the pressure between the sealing ring and the ball; when the pressure falls below a preset value, it indicates the need for wear compensation, thus achieving preventative maintenance.

[0021] Optionally, multiple bosses are provided, and the multiple bosses are arranged symmetrically in pairs.

[0022] By adopting the above technical solution, the symmetrical arrangement of the bosses in pairs enables the switching between elastic sealing and hard sealing of the sealing ring during the opening and closing process of the ball valve.

[0023] Optionally, multiple fastening blocks are provided, and the multiple fastening blocks are arranged symmetrically in pairs. The fastening blocks and the boss are offset along the axial direction of the valve stem.

[0024] By adopting the above technical solution, the fastening block and the boss are staggered in the vertical direction, so that when the connecting seat and the fastening rotating disk rotate relative to each other, the fastening block can drive the moving block to move, realizing a smooth switch between the conventional sealing mode and the wear compensation mode.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By utilizing the positional changes of the boss and fastening block as the rotating mechanism rotates, the connecting parts are driven to produce linear displacement, thereby pushing the sealing ring to press against the ball. Through the cooperative arrangement of the boss and fastening block, not only is a basic hard sealing pressure achieved, but the fastening block can also provide additional adjustment or compensation stroke. This reduces the possibility of sealing failure caused by the wear of the sealing ring due to the single boss alone being insufficient in the existing technology, thus improving the sealing performance of the ball valve and extending its service life. 2. When the sealing ring wears down due to long-term use, causing the connector to be unable to fit tightly against the ball at the highest point of the boss, the fastening rotating disc is controlled to rotate relative to the connecting seat. The fastening block continues to push the connector closer to the ball, effectively compensating for the wear gap of the sealing ring and improving the sealing performance of the ball valve. 3. By setting up a detection element, intelligent monitoring of the sealing status is achieved. The detection element can provide real-time feedback on the pressure between the sealing ring and the ball. When the pressure is lower than the preset value, it prompts that wear compensation is needed, thus realizing preventive maintenance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a high-sealing ball valve according to an embodiment of this application;

[0028] Figure 2 This is an overall cross-sectional view of a high-sealing ball valve according to an embodiment of this application;

[0029] Figure 3 This application describes a high-sealing ball valve. Figure 2 A magnified view of a portion of point A inside;

[0030] Figure 4 This application describes a high-sealing ball valve. Figure 2 A magnified view of the inner part at point B;

[0031] Figure 5 This is a schematic diagram of the ball structure of a high-sealing ball valve according to an embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the connecting seat and limiting ring of a high-sealing ball valve according to an embodiment of this application;

[0033] Figure 7This is a cross-sectional view of the valve stem, connecting seat, and fastening rotating disc of a high-sealing ball valve according to an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of the valve stem, connecting seat, and fastening rotating disc of a high-sealing ball valve according to an embodiment of this application;

[0035] Figure 9 This is a top view of the fastening rotating disc and connecting seat of a high-sealing ball valve according to an embodiment of this application;

[0036] Figure 10 This is an installation diagram of the valve body and connecting seat of a high-sealing ball valve according to an embodiment of this application;

[0037] Figure 11 This application describes a high-sealing ball valve. Figure 10 A magnified view of the inner C section.

[0038] In the diagram: 1. Valve body; 11. Limiting ring; 2. Valve stem; 21. Drive block; 3. Ball; 31. Connecting groove; 4. Sealing mechanism; 41. Second elastic element; 42. Mounting ring; 43. Sealing ring; 44. Push rod; 5. Rotating mechanism; 51. Connecting seat; 511. Insertion groove; 512. Limiting block; 52. Fastening rotating disk; 521. Fastening groove; 53. First elastic element; 6. Moving mechanism; 61. Connecting piece; 611. Connecting rod; 612. Movable block; 62. Boss; 621. First clearance surface; 63. Fastening block; 631. Second clearance surface; 7. Detection piece; 8. Handwheel; 9. Connecting block; 10. Dial; 100. Nut. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0040] This application discloses a high-sealing ball valve, such as... Figure 1 and Figure 2 As shown, the high-sealing ball valve includes a valve body 1, a valve stem 2, a ball 3, a sealing mechanism 4, a rotating mechanism 5, a moving mechanism 6, and a detection element 7. The rotating mechanism 5 includes a connecting seat 51, a fastening rotating disc 52, and a first elastic element 53; the sealing mechanism 4 includes a second elastic element 41, a mounting ring 42, a sealing ring 43, and a push rod 44; the moving mechanism 6 includes a connecting element 61, a boss 62, and a fastening block 63.

[0041] Specifically, such as Figure 3 , Figure 4 and Figure 5As shown, the ball 3 is installed inside the valve body 1, and the connecting seat 51 is connected to the valve body 1 through a sealed bearing. The ball 3 is provided with a connecting groove 31, and a connecting block 9 is fixedly connected to the connecting seat 51. After the connecting block 9 is inserted into the connecting groove 31, the connecting seat 51 can drive the ball 3 to rotate inside the valve body 1, and the rotating disk 52 is tightly connected to the valve body 1.

[0042] like Figure 6 and Figure 7 As shown, the connecting seat 51 has an insertion slot 511, and the fastening rotating disk 52 has a fastening groove 521. A driving block 21 is fixedly connected to the valve stem 2. After the valve stem 2 drives the driving block 21 through the fastening groove 521, it inserts into the insertion slot 511, so that the valve stem 2 can drive the ball 3 to rotate through the connecting seat 51, and at the same time drive the fastening rotating disk 52 to rotate synchronously. The first elastic element 53 is sleeved on the valve stem 2 and located between the driving block 21 and the valve body 1. The first elastic element 53 is a spring. The boss 62 is fixedly connected to the connecting seat 51. In this embodiment, four bosses 62 are installed and arranged symmetrically in pairs. The boss 62 is provided with a first clearance surface 621, which is an arc surface.

[0043] like Figure 3 and Figure 8 As shown, the connector 61 includes a connecting rod 611 and a movable block 612. One end of the connecting rod 611 is fixedly connected to the mounting ring 42, and the other end is fixedly connected to the movable block 612. In this embodiment, the movable block 612 has a cylindrical structure. The second elastic element 41 is located inside the valve body 1. One end of the push rod 44 is fixedly connected to the second elastic element 41, and the other end is fixedly connected to the mounting ring 42. The push rod 44 can slide relative to the valve body 1. The mounting ring 42 is fixedly connected to the sealing ring 43, and the sealing ring 43 is located between the mounting ring 42 and the ball 3. Under the action of the elastic force of the second elastic element 41, the push rod 44 pushes the mounting ring 42, causing the sealing ring 43 to press against the ball 3. The mounting ring 42 is made of elastic material, and the second elastic element 41 is a spring. In addition, multiple push rods 44 are fixedly connected to the end face of the mounting ring 42, and each push rod 44 is connected to a second elastic element 41.

[0044] When the ball valve needs to be switched between open and closed states, during the process of controlling the rotation of the ball 3, when the movable block 612 disengages from the boss 62, the sealing ring 43 presses against the ball 3 under the action of the elastic force of the second elastic element 41. At this time, the pressure between the sealing ring 43 and the ball 3 is provided by the second elastic element 41, realizing elastic sealing, thereby reducing the friction between the ball 3 and the sealing ring 43 during the rotation, and thus reducing the wear of the sealing ring 43.

[0045] When the movable block 612 moves to abut against the boss 62 and gradually moves to the apex of the first clearance surface 621, the connecting rod 611 drives the mounting ring 42 to move closer to the ball 3, causing the sealing ring 43 to press against the ball 3. When the movable block 612 moves to abut against the highest apex of the first clearance surface 621, the tightness between the sealing ring 43 and the ball 3 is at its maximum, and the sealing state between the sealing ring 43 and the ball 3 changes from elastic sealing to hard sealing, ensuring the sealing performance of the sealing ring 43. In this embodiment, the position of the boss 62 is set so that when the ball valve is in the fully open and fully closed states, the movable block 612 is at the apex of the first clearance surface 621 of the corresponding boss 62, thereby improving the sealing performance of the ball valve in the fully open and fully closed states. This application reduces the wear of the sealing ring 43 during the state adjustment process of the ball valve by switching between hard sealing and elastic sealing, while ensuring the sealing performance of the ball valve in the open and closed states.

[0046] like Figure 8 and Figure 9 As shown, fastening blocks 63 are fixedly installed on the fastening rotating disk 52. In this embodiment, four fastening blocks 63 are installed and arranged symmetrically in pairs. At the same time, the fastening blocks 63 and the boss 62 are staggered in the vertical direction, so that when the movable block 612 abuts against the boss 62, it does not come into contact with the fastening blocks 63. The fastening block 63 is provided with a second clearance surface 631. The second clearance surface 631 is a slope. When the second clearance surface 631 contacts and moves with the movable block 612, it can drive the movable block 612 to move.

[0047] like Figure 4 and Figure 8 As shown, a detection element 7 is fixedly installed between the connecting rod 611 and the movable block 612. Preferably, the detection element 7 is a pressure sensor. When the movable block 612 is at the highest point of the first clearance surface 621 of the corresponding boss 62, the detection element 7 can detect the tension of the movable block 612 on the connecting rod 611, thereby detecting the pressure between the sealing ring 43 and the ball 3. When the detection element 7 detects that the pressure is lower than a preset value, it indicates that when the movable block 612 is at the highest point of the first clearance surface 621 of the boss 62, the wear between the sealing ring 43 and the ball 3 may affect the sealing performance of the ball valve, requiring wear compensation to achieve preventive maintenance. In addition, a display is installed on the valve body 1, and the display is electrically connected to the detection element 7. The display can show the pressure value obtained by the detection element 7 for easy observation by the operator.

[0048] It should be noted that when the detection element 7 detects a pressure value lower than the preset value, the control display will issue a warning. The operator moves the valve stem 2 away from the valve body 1, causing the drive block 21 to disengage from the insertion slot 511. At this time, the drive block 21 still passes through the fastening slot 521.

[0049] Then, the valve stem 2 is rotated, causing the fastening rotating disk 52 to rotate relative to the connecting seat 51. When the fastening rotating disk 52 and the connecting seat 51 rotate relative to each other, the second clearance surface 631 of the fastening block 63, which is close to the movable block 612, contacts the movable block 612. As the fastening rotating disk 52 continues to rotate, the second clearance surface 631 drives the movable block 612 to move closer to the ball 3. At this time, the mounting ring 42 pushes the sealing ring 43 against the ball 3. When the detection element 7 detects that the pressure between the sealing ring 43 and the ball 3 meets the sealing requirements, the valve stem 2 stops rotating. After the valve stem 2 stops rotating, the operator releases the valve stem 2. At this time, the valve stem 2 moves closer to the ball 3 under the action of the elastic force of the first elastic element 53. Since the fastening rotating disk 52 and the connecting seat 51 have rotated relative to each other, the drive block 21 cannot be inserted into the insertion slot 511. At the same time, under the action of the elastic force of the first elastic element 53, the end face of the drive block 21 abuts against the connecting seat 51, thereby reducing the possibility of relative rotation between the fastening rotating disk 52 and the connecting seat 51. Meanwhile, after the valve stem 2 has rotated, the nut 100 threaded on the valve stem 2 abuts against the valve body 1, which can restrict the movement of the valve stem 2, further reducing the possibility of the fastening rotating disk 52 moving.

[0050] In addition, such as Figure 10 and Figure 11 As shown, a limiting ring 11 is fixedly connected to the valve body 1, and a limiting block 512 is fixedly connected to the connecting seat 51. When the limiting block 512 abuts against the limiting ring 11, it can limit the rotation angle of the connecting seat 51, thereby realizing the complete opening and closing of the ball valve. In this embodiment, the limiting ring 11 restricts the ball 3 to rotate only 90 degrees.

[0051] In addition, such as Figure 7 As shown, a handwheel 8 is fixedly connected to the valve body 1. The handwheel 8 is fixedly connected to the valve stem 2. The handwheel 8 allows the operator to rotate the valve stem 2. At the same time, a scale 10 is provided on the valve body 1. The rotation angle of the handwheel 8 can be indicated by the scale 10, thereby indicating the rotation angle of the valve stem 2.

[0052] The implementation principle of a high-sealing ball valve in this application embodiment is as follows: When adjusting the working state of the ball valve, the operator inserts the drive block 21 into the insertion slot 511 and rotates the valve stem 2, causing the connecting seat 51 and the fastening rotating disk 52 to rotate simultaneously, while the ball 3 rotates.

[0053] During the rotation of the ball 3, after the movable block 612 disengages from the boss 62, the sealing ring 43 presses against the ball 3 under the action of the elastic force of the second elastic element 41, thereby achieving an elastic seal and reducing the friction and wear between the ball 3 and the sealing ring 43 during the rotation.

[0054] When the ball valve is in the fully open and fully closed state, the movable block 612 is at the apex of the first clearance surface 621, so that the mounting ring 42, under the pull of the connecting rod 611, pushes the sealing ring 43 to the ball 3, achieving a hard seal and ensuring the sealing performance of the ball valve during use.

[0055] When the pressure value between the warning sealing ring 43 and the ball 3 is lower than the preset value, the operator lifts the valve stem 2 and moves it a specified distance, causing the drive block 21 to disengage from the insertion slot 511.

[0056] After the drive block 21 disengages from the insertion slot 511, the valve stem 2 is rotated, causing the fastening rotating disk 52 to rotate relative to the connecting seat 51. The rotation of the fastening rotating disk 52 drives the fastening block 63 to rotate until it abuts against the movable block 612. As the fastening block 63 continues to rotate, the movable block 612 moves away from the sealing ring 43, thereby causing the mounting ring 42 to push the sealing ring 43 against the ball 3. During the rotation of the fastening rotating disk 52, when the detection element 7 detects that the pressure between the sealing ring 43 and the ball 3 has reached the sealing pressure value, the valve stem 2 stops rotating.

[0057] After the valve stem 2 stops rotating, the operator releases the valve stem 2, causing the drive block 21 to press against the connecting seat 51 with the elastic force of the first elastic element 53. Then, the nut 100 on the valve stem 2 is adjusted to abut against the valve body 1 to lock the position of the valve stem 2 and complete the ball valve sealing compensation work.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-sealing ball valve, characterized in that, It includes a valve body (1), a valve stem (2), a ball (3), a sealing mechanism (4), a rotating mechanism (5), and a moving mechanism (6); the ball (3) and the rotating mechanism (5) are both disposed inside the valve body (1); The valve stem (2) passes through the valve body (1), and the rotating mechanism (5) is disposed on the valve stem (2); the valve stem (2) drives the ball (3) to rotate through the rotating mechanism (5); The sealing mechanism (4) includes a sealing ring (43) that abuts against the sphere (3); The moving mechanism (6) includes a connector (61), a boss (62), and a fastening block (63); the boss (62) and the fastening block (63) are both disposed on the rotating mechanism (5), and the connector (61) is disposed on the sealing ring (43); the rotating mechanism (5) drives the boss (62) to abut against the connector (61) and rotate, so that the connector (61) drives the sealing ring (43) to move; When the connector (61) abuts against the boss (62), the rotating mechanism (5) drives the fastening block (63) to rotate relative to the boss (62), causing the connector (61) to drive the sealing ring (43) to move toward the sphere (3).

2. The high-sealing ball valve according to claim 1, characterized in that, The rotating mechanism (5) includes a connecting seat (51), which is rotatably connected to the valve body (1); the valve stem (2) drives the ball (3) to rotate through the connecting seat (51), and the boss (62) is provided on the connecting seat (51).

3. A high-sealing ball valve according to claim 2, characterized in that, The rotating mechanism (5) further includes a fastening rotating disk (52), which is rotatably connected to the valve body (1), and the fastening block (63) is disposed on the fastening rotating disk (52); The fastening rotating disk (52) rotates relative to the connecting seat (51), causing the fastening block (63) to drive the connecting piece (61) to move.

4. A high-sealing ball valve according to claim 3, characterized in that, The rotating mechanism (5) further includes a first elastic element (53), which is sleeved on the valve stem (2); a driving block (21) is provided on the valve stem (2), and the driving block (21) passes through the fastening rotating disk (52) and is inserted into the connecting seat (51); After the fastening rotating disk (52) rotates relative to the connecting seat (51), the first elastic element (53) drives the driving block (21) to press against the connecting seat (51).

5. A high-sealing ball valve according to claim 1, characterized in that, The sealing mechanism (4) includes a second elastic element (41), a mounting ring (42), a sealing ring (43), and a push rod (44); the connecting member (61) is disposed on the mounting ring (42), and the mounting ring (42) abuts against the sealing ring (43); the push rod (44) is disposed on the mounting ring (42). The second elastic element (41) is disposed between the valve body (1) and the push rod (44); When the connector (61) disengages from the boss (62), the second elastic member (41) drives the mounting ring (42) to move, causing the sealing ring (43) to press against the ball (3).

6. A high-sealing ball valve according to claim 5, characterized in that, The connector (61) includes a connecting rod (611) and a movable block (612). The movable block (612) is connected to the mounting ring (42) via the connecting rod (611). The movable block (612) abuts against the boss (62) or the fastening block (63).

7. A high-sealing ball valve according to claim 6, characterized in that, It also includes a detection element (7), which is disposed between the connecting rod (611) and the movable block (612), and the detection element (7) is used to detect the pressure between the sealing ring (43) and the ball (3).

8. A high-sealing ball valve according to claim 1, characterized in that, The boss (62) is provided in multiple ways, and the multiple bosses (62) are arranged symmetrically in pairs.

9. A high-sealing ball valve according to claim 1, characterized in that, Multiple fastening blocks (63) are provided, and the multiple fastening blocks (63) are arranged symmetrically in pairs. The fastening blocks (63) and the boss (62) are offset along the axial direction of the valve stem (2).

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