Butterfly valve for controlling pressure of vacuum reaction chamber

Abstract

The utility model discloses a butterfly valve for pressure control of a vacuum reaction chamber, which relates to the technical field of butterfly valves and comprises a valve seat and a valve body fixedly arranged at the top of the valve seat, a connecting pipe is fixedly arranged at the upper end in the valve body in a penetrating manner, and a valve plate is rotatably arranged in the connecting pipe. A first bearing seat, a second bearing seat and a third bearing seat are sequentially arranged in the valve seat from top to bottom, the third bearing seat is fixedly connected with the inner wall of the valve seat, an output shaft is rotationally arranged in the third bearing seat, the output shaft penetrates into the valve body and is fixedly arranged in the valve plate, and a motor is fixedly arranged at the bottom of the valve seat. The output end of the motor penetrates into the valve seat and is fixedly sleeved with a first synchronous wheel, a transmission shaft is rotationally arranged in the first bearing seat and the second bearing seat jointly, and the upper end and the lower end of the transmission shaft are fixedly sleeved with a second synchronous wheel and a third synchronous wheel respectively. By changing the tensioning mode of the synchronous belt, the transmission precision of the system is improved, so that the pressure control precision and stability of the butterfly valve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve used for pressure control of a vacuum reaction chamber. Background Art

[0002] The butterfly valve, also known as the butterfly valve or butterfly valve, is a lightweight, small fluid control valve. Its working principle is to control the flow of fluid by rotating the valve plate. The butterfly valve can control the gas flow entering or exhausting the vacuum reaction chamber by adjusting the opening of the valve plate, thereby achieving precise control of the pressure in the chamber.

[0003] The existing butterfly valve is a two-stage synchronous belt transmission system. The rotating shaft of the synchronous wheel relies on a copper sleeve for support and lubrication. The copper sleeve is an eccentric structure. The distance between the two rotating shafts is changed by adjusting the rotation of the eccentric copper sleeve, thereby adjusting the tightness of the belt. However, when the belt is tightened, the contact force between the rotating shaft and the copper sleeve will increase, increasing wear and reducing the overall life. In a short period of time, the butterfly valve will lose the stability of pressure control.

[0004] Therefore, we propose a butterfly valve for vacuum reaction chamber pressure control to solve the above problems. Utility Model Content

[0005] In view of the above problems existing in the existing butterfly valve for controlling the pressure of a vacuum reaction chamber, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a butterfly valve for vacuum reaction chamber pressure control, which solves the problem that when the internal belt of the butterfly valve in the prior art is tightened, the contact force between the rotating shaft and the copper sleeve will increase, increasing wear and reducing the overall life, and the butterfly valve will lose the stability of pressure control in a short period of time.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A butterfly valve for vacuum reaction chamber pressure control, comprising a valve seat and a valve body fixedly arranged on the top of the valve seat, a connecting pipe fixedly penetrated through the upper end of the inner part of the valve body, a valve plate rotatably arranged inside the connecting pipe, a first bearing seat, a second bearing seat and a third bearing seat arranged in sequence from top to bottom inside the valve seat, and the third bearing seat is fixedly connected to the inner wall of the valve seat;

[0009] An output shaft is rotatably arranged inside the third bearing seat, and the output shaft passes through the valve body and is fixed inside the valve plate;

[0010] A motor is fixedly provided at the bottom of the valve seat, and the output end of the motor passes through the valve seat and is fixedly sleeved with a first synchronous wheel. A transmission shaft is provided inside the first bearing seat and the second bearing seat for common rotation. A second synchronous wheel and a third synchronous wheel are fixedly sleeved at the upper and lower ends of the transmission shaft respectively, and a fourth synchronous wheel is fixedly sleeved at the lower end of the outer wall of the output shaft. A first synchronous belt is provided between the first synchronous wheel and the second synchronous wheel, and a second synchronous belt is provided between the third synchronous wheel and the fourth synchronous wheel.

[0011] Preferably, the first bearing seat and the second bearing seat have strip holes at their inner lower ends, the inner wall of the valve seat has a plurality of positioning holes, positioning bolts are slidably passed through the strip holes, and the threaded ends of the positioning bolts are disposed in the positioning holes.

[0012] Preferably, the third bearing seat is screwed and fixed to the inner wall of the valve seat by means of mounting bolts.

[0013] Preferably, a movable frame is provided on the outer wall of the third bearing seat, a fixing bolt is threadedly provided on the lower end of the movable frame, an adjusting wheel is provided on the outer wall rotating sleeve of the fixing bolt, and the adjusting wheel is in contact with and cooperates with the first synchronous belt.

[0014] Furthermore, an adjusting screw is threadedly penetrated through the side of the movable frame, one end of the adjusting screw is rotatably connected to the outer wall of the third bearing seat, and the other end of the adjusting screw is fixedly sleeved with a rotating block.

[0015] Preferably, a guide rod is fixedly provided on the outer wall of the third bearing seat, and the movable frame is slidably sleeved on the outer side of the guide rod.

[0016] Preferably, a limiting nut is provided on the threaded sleeve at the lower end of the fixing bolt.

[0017] Preferably, a gasket is sleeved on the upper end of the fixing bolt.

[0018] Preferably, the movable frame is arranged in an L shape.

[0019] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0020] 1. The utility model improves the transmission accuracy of the system by changing the tensioning mode of the synchronous belt through the first bearing seat, the second bearing seat, the third bearing seat, the first synchronous wheel, the second synchronous wheel, the third synchronous wheel, the fourth synchronous wheel, the strip hole, the positioning hole, the positioning bolt, the moving frame, the fixing bolt and the adjusting wheel, thereby improving the accuracy and stability of the pressure control of the butterfly valve.

[0021] 2. The utility model can finely and conveniently adjust the position of the adjusting wheel through the first synchronous belt, movable frame, third bearing seat, adjusting screw, rotating block and guide rod, and can quickly adjust and tighten the first synchronous belt after the second synchronous belt is tightened, thereby improving the convenience of using the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a side structural schematic diagram of the utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of the valve seat of the utility model;

[0026] Figure 4 For the utility model Figure 3 A magnified schematic diagram of part A.

[0027] Description of reference numerals:

[0028] 1. Valve seat; 2. Valve body; 3. Connecting pipe; 4. Valve plate; 5. First bearing seat; 6. Second bearing seat; 7. Third bearing seat; 8. Output shaft; 9. Motor; 10. First synchronous wheel; 11. Transmission shaft; 12. Second synchronous wheel; 13. Third synchronous wheel; 14. Fourth synchronous wheel; 15. First synchronous belt; 16. Second synchronous belt; 17. Positioning hole; 18. Positioning bolt; 19. Mounting bolt; 20. Moving frame; 21. Fixing bolt; 22. Adjusting wheel; 23. Adjusting screw; 24. Rotating block; 25. Guide rod; 26. Limiting nut; 27. Gasket. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The utility model embodiment discloses a butterfly valve for controlling the pressure of a vacuum reaction chamber.

[0031] Example 1

[0032] The utility model provides Figure 1-4A butterfly valve for vacuum reaction chamber pressure control shown in the figure comprises a valve seat 1 and a valve body 2 fixedly arranged on the top of the valve seat 1, a connecting pipe 3 is fixedly penetrated at the upper end of the inner part of the valve body 2, a valve plate 4 is rotatably arranged inside the connecting pipe 3, a first bearing seat 5, a second bearing seat 6 and a third bearing seat 7 are arranged in sequence inside the valve seat 1 from top to bottom, the third bearing seat 7 is fixedly connected to the inner wall of the valve seat 1, and the third bearing seat 7 is screwed and fixed to the inner wall of the valve seat 1 by means of mounting bolts 19;

[0033] An output shaft 8 is rotatably arranged inside the third bearing seat 7, and the output shaft 8 passes through the valve body 2 and is fixed inside the valve plate 4;

[0034] A motor 9 is fixedly provided at the bottom of the valve seat 1, and the output end of the motor 9 penetrates into the valve seat 1 and is fixedly sleeved with a first synchronous wheel 10, a transmission shaft 11 is provided inside the first bearing seat 5 and the second bearing seat 6 to rotate together, and a second synchronous wheel 12 and a third synchronous wheel 13 are fixedly sleeved at the upper and lower ends of the transmission shaft 11, respectively, and a fourth synchronous wheel 14 is fixedly sleeved at the lower end of the outer wall of the output shaft 8, a first synchronous belt 15 is provided between the first synchronous wheel 10 and the second synchronous wheel 12, and a second synchronous belt 16 is provided between the third synchronous wheel 13 and the fourth synchronous wheel 14;

[0035] The first bearing seat 5 and the second bearing seat 6 are both provided with strip holes at their inner lower ends. The inner wall of the valve seat 1 is provided with a plurality of positioning holes 17 . Positioning bolts 18 are slidably passed through the strip holes. The threaded ends of the positioning bolts 18 are disposed in the positioning holes 17 .

[0036] When the butterfly valve is in use, the output shaft 8 can be driven to rotate stably by the motor 9 and under the transmission of the first synchronous wheel 10, the second synchronous wheel 12, the first synchronous belt 15, the third synchronous wheel 13, the fourth synchronous wheel 14 and the second synchronous belt 16 to control the opening degree of the valve plate 4 and complete the flow control. When adjusting the internal components of the butterfly valve, the first bearing seat 5 and the second bearing seat 6 inside the valve seat 1 can be first moved laterally, and the center distance between the third synchronous wheel 13 and the fourth synchronous wheel 14 can be adjusted so that the second synchronous belt 16 can be stably tensioned. After the positions of the first bearing seat 5 and the second bearing seat 6 are determined, the positioning bolts 18 can be passed through the strip holes and connected to the positioning holes 17 at different positions on the inner wall of the valve seat 1, so as to complete the position fixing of the second synchronous wheel 12 and the third synchronous wheel 13. After the second synchronous belt 16 is tensioned, the first synchronous belt 15 is adjusted and tensioned.

[0037] Example 2

[0038] Embodiment 2 is based on Embodiment 1 to adjust the tension of the first synchronous belt 15, such as Figure 3-4As shown, the outer wall of the third bearing seat 7 is in contact with a movable frame 20, and the movable frame 20 is L-shaped. The lower end of the movable frame 20 is threaded with a fixing bolt 21, and the outer wall of the fixing bolt 21 is rotatably sleeved with an adjusting wheel 22. The upper end of the fixing bolt 21 is sleeved with a gasket 27. The adjusting wheel 22 is in contact with and cooperates with the first synchronous belt 15, and the lower end of the fixing bolt 21 is threadedly sleeved with a limiting nut 26.

[0039] After the second synchronous belt 16 is adjusted, the movable frame 20 can be moved forward and backward, so that the movable frame 20 drives the adjusting wheel 22 to move when moving along the outer wall of the third bearing seat 7, so that the adjusting wheel 22 can contact the first synchronous belt 15 and squeeze the first synchronous belt 15, so that the first synchronous belt 15 can complete the adjustment of its own tension under the setting of the first synchronous wheel 10, the second synchronous wheel 12 and the adjusting wheel 22. Since the adjusting wheel 22 is supported by the limit nut 26, it can perform stable contact transmission with the first synchronous belt 15 when driven.

[0040] Example 3

[0041] Embodiment 3 is based on Embodiment 2 in order to be able to quickly adjust the position of the adjusting wheel 22, such as Figure 4 As shown, an adjusting screw 23 is threaded through the side of the movable frame 20, one end of the adjusting screw 23 is rotatably connected to the outer wall of the third bearing seat 7, and the other end of the adjusting screw 23 is fixedly sleeved with a rotating block 24, and a guide rod 25 is fixedly provided on the outer wall of the third bearing seat 7, and the movable frame 20 is slidably sleeved on the outer side of the guide rod 25.

[0042] When the position of the adjusting wheel 22 needs to be adjusted, the rotating block 24 can be pushed so that the adjusting screw 23 can be rotated. At this time, the sliding support of the movable frame 20 on the guide rod 25 drives the adjusting wheel 22 to move horizontally, thereby completing the position determination of the adjusting wheel 22 and completing the adjustment of the tension of the first synchronous belt 15.

[0043] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A butterfly valve for controlling the pressure of a vacuum reaction chamber, comprising a valve seat (1) and a valve body (2) fixedly arranged on the top of the valve seat (1), characterized in that: A connecting pipe (3) is fixedly inserted into the upper end of the valve body (2), a valve plate (4) is rotatably arranged inside the connecting pipe (3), a first bearing seat (5), a second bearing seat (6) and a third bearing seat (7) are arranged in sequence from top to bottom inside the valve seat (1), and the third bearing seat (7) is fixedly connected to the inner wall of the valve seat (1); An output shaft (8) is rotatably arranged inside the third bearing seat (7), and the output shaft (8) passes through the valve body (2) and is fixed inside the valve plate (4); A motor (9) is fixedly provided at the bottom of the valve seat (1), the output end of the motor (9) penetrates into the valve seat (1) and is fixedly sleeved with a first synchronous wheel (10), a transmission shaft (11) is provided inside the first bearing seat (5) and the second bearing seat (6) for common rotation, a second synchronous wheel (12) and a third synchronous wheel (13) are fixedly sleeved at the upper and lower ends of the transmission shaft (11), a fourth synchronous wheel (14) is fixedly sleeved at the lower end of the outer wall of the output shaft (8), a first synchronous belt (15) is provided between the first synchronous wheel (10) and the second synchronous wheel (12), and a second synchronous belt (16) is provided between the third synchronous wheel (13) and the fourth synchronous wheel (14).

2. The butterfly valve for vacuum reaction chamber pressure control according to claim 1, characterized in that: The first bearing seat (5) and the second bearing seat (6) are each provided with a strip-shaped hole at their inner lower ends, and the inner wall of the valve seat (1) is provided with a plurality of positioning holes (17), positioning bolts (18) are slidably inserted into the strip-shaped holes, and the threaded ends of the positioning bolts (18) are arranged in the positioning holes (17).

3. The butterfly valve for vacuum reaction chamber pressure control according to claim 1, characterized in that: The third bearing seat (7) is screwed and fixed to the inner wall of the valve seat (1) by means of mounting bolts (19).

4. The butterfly valve for vacuum reaction chamber pressure control according to claim 1, characterized in that: The outer wall of the third bearing seat (7) is provided with a movable frame (20), the lower end of the movable frame (20) is threadedly provided with a fixing bolt (21), the outer wall of the fixing bolt (21) is rotatably sleeved with an adjusting wheel (22), and the adjusting wheel (22) is in contact with and cooperates with the first synchronous belt (15).

5. The butterfly valve for vacuum reaction chamber pressure control according to claim 4, characterized in that: An adjusting screw (23) is threadedly inserted into the side of the movable frame (20), one end of the adjusting screw (23) is rotatably connected to the outer wall of the third bearing seat (7), and the other end of the adjusting screw (23) is fixedly sleeved with a rotating block (24).

6. The butterfly valve for vacuum reaction chamber pressure control according to claim 4, characterized in that: A guide rod (25) is fixedly provided on the outer wall of the third bearing seat (7), and the movable frame (20) is slidably sleeved on the outer side of the guide rod (25).

7. The butterfly valve for vacuum reaction chamber pressure control according to claim 4, characterized in that: A limiting nut (26) is threadedly sleeved on the lower end of the fixing bolt (21).

8. The butterfly valve for vacuum reaction chamber pressure control according to claim 4, characterized in that: A gasket (27) is sleeved on the upper end of the fixing bolt (21).

9. The butterfly valve for vacuum reaction chamber pressure control according to claim 4, characterized in that: The movable frame (20) is arranged in an L shape.

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