Automatic blowing device of air-cooled refrigeration dryer

Abstract

The utility model relates to the technical field of refrigeration dryers, and discloses an automatic blowing device of an air-cooled refrigeration dryer, which comprises a limit retaining mechanism, a mounting bracket fixedly mounted on the outer wall of the limit retaining mechanism, an air inlet pipe fixedly mounted on the back of the limit retaining mechanism, and a servo motor fixedly mounted at the upper end of the back of the limit retaining mechanism, the output end of the servo motor movably penetrates through the upper end of the front face of the limiting maintaining mechanism, an eccentric wheel is fixedly installed at the output end of the servo motor, a connecting rod is movably installed on one side of the front face of the eccentric wheel, a rotating ring assembly is movably installed at the lower end of the back face of the connecting rod, and an airflow adjusting mechanism is movably installed on the back face of the rotating ring assembly. According to the air-cooled refrigeration dryer, the airflow adjusting mechanism is arranged, the airflow adjusting mechanism can be automatically opened and closed, the airflow adjusting mechanism is accurately opened and closed through accurate control of the servo motor, it is ensured that the airflow speed reaches the required standard, the object drying effect is ensured, and the using effect of the air-cooled refrigeration dryer is improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigerated dryer technology, and in particular to an automatic purging device for an air-cooled refrigerated dryer. Background Technology

[0002] A refrigerated air dryer, short for a freeze dryer, is a new type of air source processing component in a pneumatic system. Its working principle involves heat exchange between a refrigerant and compressed air, lowering the compressed air temperature to a dew point range of 2-10°C. This heat exchange removes moisture (water vapor) from the compressed air. With the continuous development of the refrigerated air dryer industry, more and more companies are entering the air compressor industry, and more and more people are favoring refrigerated air dryers. Many companies are emerging as leaders in this field. A low-pressure dew point can be achieved when the compressed air pressure is high, the temperature is low, the ambient temperature is low, and the volume of air processed is small. Atmospheric pressure dew point can only reach -17°C.

[0003] In actual use, existing air-cooled refrigerated dryers cannot precisely control the airflow speed. If the airflow speed is too fast or too slow, the drying effect of the items will be poor, which will seriously affect the performance of the air-cooled refrigerated dryer.

[0004] Therefore, we propose an automatic purging device for air-cooled refrigerated dryers. Utility Model Content

[0005] The present invention aims to solve the technical problems existing in the prior art and provide an automatic purging device for an air-cooled refrigerated dryer.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an automatic purging device for an air-cooled refrigerated dryer, comprising a limiting and holding mechanism. A mounting bracket is fixedly installed on the outer wall of the limiting and holding mechanism. An air inlet pipe, which is cylindrical, is fixedly installed on the back of the limiting and holding mechanism. A servo motor is fixedly installed at the upper end of the back of the limiting and holding mechanism, and the output end of the servo motor movably penetrates the upper end of the front of the limiting and holding mechanism. An eccentric wheel is fixedly installed at the output end of the servo motor. A connecting rod is movably installed on one side of the front of the eccentric wheel, and a rotating ring assembly is movably installed at the lower end of the back of the connecting rod. The rotating ring assembly is circular. An airflow regulating mechanism is movably installed on the back of the rotating ring assembly, and an air outlet pipe is movably installed on the front of the rotating ring assembly. The air outlet pipe is cylindrical. The limiting and holding mechanism includes a limiting frame. A first arc-shaped groove is opened on the upper right side of the front of the limiting frame. The airflow regulating mechanism includes a first opening and closing block. A second opening and closing block is movably installed on one side of the outer wall of the first opening and closing block. The rotating ring assembly includes a rotating ring body. A first movable locking post is fixedly installed on the upper right side of the front of the rotating ring body. The outer wall of the first movable locking post movably passes through the first opening and closing movable hole and is movably connected to the first arc-shaped groove.

[0007] Preferably, the front right side of the limiting frame is provided with a second arc-shaped groove, the lower right side of the front of the limiting frame is provided with a third arc-shaped groove, the lower left side of the front of the limiting frame is provided with a fourth arc-shaped groove, the upper left side of the front of the limiting frame is provided with a fifth arc-shaped groove, and a first limiting post is fixedly installed on the front of the limiting frame between the first and second arc-shaped grooves.

[0008] Preferably, a third opening block is movably installed on the side of the outer wall of the second opening block away from the first opening block, a fourth opening block is movably installed on the side of the outer wall of the third opening block away from the second opening block, a fifth opening block is movably installed on the side of the outer wall of the fourth opening block away from the third opening block, and the side of the outer wall of the fifth opening block away from the fourth opening block is movably connected to the other side wall of the first opening block.

[0009] Preferably, a second movable locking post is fixedly installed on the right side of the front of the rotating ring body, and the outer wall of the second movable locking post movably passes through the second opening and closing movable hole and is movably connected to the second arc-shaped groove. A third movable locking post is fixedly installed at the lower end of the front of the rotating ring body, and the outer wall of the third movable locking post movably passes through the third opening and closing movable hole and is movably connected to the third arc-shaped groove.

[0010] Preferably, a second limiting post is fixedly installed on the front of the limiting frame between the second and third arc-shaped grooves, a third limiting post is fixedly installed on the front of the limiting frame between the third and fourth arc-shaped grooves, a fourth limiting post is fixedly installed on the front of the limiting frame between the fourth and fifth arc-shaped grooves, and a fifth limiting post is fixedly installed on the front of the limiting frame between the fifth arc-shaped groove and the fifth limiting post.

[0011] Preferably, a first opening and closing arc groove is provided on one side of the back of the first opening and closing block, and the first opening and closing arc groove is movably connected to the outer wall of the first limiting post, and a first opening and closing movable hole is provided on the other side of the back of the first opening and closing block.

[0012] Preferably, a second opening and closing arc groove is provided on one side of the back of the second opening and closing block, and the second opening and closing arc groove is movably connected to the outer wall of the second limiting post. A second opening and closing movable hole is provided on the other side of the back of the second opening and closing block. A third opening and closing arc groove is provided on one side of the back of the third opening and closing block, and the third opening and closing arc groove is movably connected to the outer wall of the third limiting post. A third opening and closing movable hole is provided on the other side of the back of the third opening and closing block.

[0013] Preferably, the fourth opening and closing block has a fourth opening and closing arc-shaped groove on one side of its back surface, and the fourth opening and closing arc-shaped groove is movably connected to the outer wall of the fourth limiting post. The fourth opening and closing block has a fourth opening and closing movable hole on the other side of its back surface. The fifth opening and closing block has a fifth opening and closing arc-shaped groove on one side of its back surface, and the fifth opening and closing arc-shaped groove is movably connected to the outer wall of the fifth limiting post. The fifth opening and closing block has a fifth opening and closing movable hole on the other side of its back surface.

[0014] Preferably, a fourth movable locking post is fixedly installed on the lower left side of the front of the rotating ring body, and the outer wall of the fourth movable locking post movably passes through the fourth opening and closing movable hole and is movably connected to the fourth arc-shaped groove. A fifth movable locking post is fixedly installed on the upper left side of the front of the rotating ring body, and the outer wall of the fifth movable locking post movably passes through the fifth opening and closing movable hole and is movably connected to the fifth arc-shaped groove.

[0015] Beneficial effects

[0016] This utility model provides an automatic purging device for an air-cooled refrigerated dryer. It has the following beneficial effects:

[0017] (1) The automatic blowing device for the air-cooled refrigerated dryer is equipped with an airflow adjustment mechanism that can automatically open and close. The airflow adjustment mechanism is precisely opened and closed by the precise control of the servo motor to ensure that the airflow speed reaches the required standard, thus ensuring the drying effect of the items and improving the performance of the air-cooled refrigerated dryer.

[0018] (2) The automatic purging device for air-cooled refrigerated dryer is equipped with an eccentric wheel, a connecting rod and a rotating ring assembly. The rotation of the eccentric wheel drives the rotating ring assembly to reciprocate through the connecting rod. The rotating ring assembly drives the airflow adjustment mechanism to open and close on the limit holding mechanism. The overall structure is simple and the opening and closing size of the airflow adjustment mechanism can be precisely controlled according to the rotation of the output end of the servo motor.

[0019] (3) The automatic purging device for the air-cooled refrigerated dryer is provided with a first opening and closing arc groove, a second opening and closing arc groove, a third opening and closing arc groove, a fourth opening and closing arc groove, a fifth opening and closing arc groove, and a first arc groove, a second arc groove, a third arc groove, a fourth arc groove, and a fifth arc groove. The first opening and closing arc groove, the second opening and closing arc groove, the third opening and closing arc groove, the fourth opening and closing arc groove, and the fifth opening and closing arc groove are not through the whole structure, so that the whole structure has a certain degree of sealing and ensures that no slight gas flow occurs when the airflow regulating mechanism is closed, thus ensuring the drying effect of the items. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the limiting and retaining mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the rotating ring assembly structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the airflow regulating mechanism of this utility model.

[0024] Legend: 10. Limit holding mechanism; 11. Mounting bracket; 12. Servo motor; 13. Eccentric wheel; 14. Connecting rod; 15. Airflow regulating mechanism; 16. Rotating ring assembly; 17. Air inlet pipe; 18. Air outlet pipe; 19. Limiting frame; 20. First arc-shaped groove; 21. Second arc-shaped groove; 22. Third arc-shaped groove; 23. Fourth arc-shaped groove; 24. Fifth arc-shaped groove; 25. First limiting post; 26. Second limiting post; 27. Third limiting post; 28. Fourth limiting post; 29. ​​Fifth limiting post; 30. Rotating ring body; 31. First movable locking post; 32. Second movable locking post; 33. Third movable locking post; 34. Fourth movable locking post; 35. Fifth movable locking post; 36. First opening and closing block; 37. Second opening and closing block; 38. Third opening and closing block; 39. Fourth opening and closing block; 40. Fifth opening and closing block; 41. First opening and closing arc-shaped groove; 42. First opening and closing movable hole; 43. Second opening and closing arc-shaped groove; 44. Second opening and closing movable hole; 45. Third opening and closing arc-shaped groove; 46. Third opening and closing movable hole; 47. Fourth opening and closing arc-shaped groove; 48. Fourth opening and closing movable hole; 49. Fifth opening and closing arc-shaped groove; 50. Fifth opening and closing movable hole. Detailed Implementation

[0025] Example 1: An automatic purging device for an air-cooled refrigerated dryer, such as Figure 1As shown, the device includes a limit holding mechanism 10. A mounting bracket 11 is fixedly installed on the outer wall of the limit holding mechanism 10. An air inlet pipe 17, which is cylindrical, is fixedly installed on the back of the limit holding mechanism 10. A servo motor 12 is fixedly installed at the upper end of the back of the limit holding mechanism 10. The servo motor 12 is existing technology and will not be described in detail here. The output end of the servo motor 12 movably passes through the upper end of the front of the limit holding mechanism 10. An eccentric wheel 13 is fixedly installed at the output end of the servo motor 12. A connecting rod 14 is movably installed on one side of the front of the eccentric wheel 13. A rotating ring assembly 16 is movably installed at the lower back of the 14. The rotating ring assembly 16 is circular. An airflow regulating mechanism 15 is movably installed on the back of the rotating ring assembly 16. An air outlet pipe 18 is movably installed on the front of the rotating ring assembly 16. The air outlet pipe 18 is cylindrical. By setting the airflow regulating mechanism 15, the airflow regulating mechanism 15 can be automatically opened and closed. The airflow regulating mechanism 15 is precisely opened and closed by the precise control of the servo motor 12 to ensure that the airflow speed reaches the required standard, thus ensuring the drying effect of the items and improving the performance of the air-cooled refrigerated dryer.

[0026] Example 2: Based on Example 1, as follows Figure 2 - Figure 3As shown, the limiting and retaining mechanism 10 includes a limiting frame 19. A first arc-shaped groove 20 is formed on the upper right side of the front of the limiting frame 19; a second arc-shaped groove 21 is formed on the right side of the front of the limiting frame 19; a third arc-shaped groove 22 is formed on the lower right side of the front of the limiting frame 19; a fourth arc-shaped groove 23 is formed on the lower left side of the front of the limiting frame 19; and a fifth arc-shaped groove 24 is formed on the upper left side of the front of the limiting frame 19. A first limiting post 25 is fixedly installed on the front of the limiting frame 19 between the first and second arc-shaped grooves 20 and 21; a second limiting post 26 is fixedly installed on the front of the limiting frame 19 between the second and third arc-shaped grooves 21 and 22; and a third limiting post is fixedly installed on the front of the limiting frame 19 between the third and fourth arc-shaped grooves 22 and 23. 27. A fourth limiting post 28 is fixedly installed on the front of the limiting frame 19 between the fourth arc-shaped groove 23 and the fifth arc-shaped groove 24. A fifth limiting post 29 is fixedly installed on the front of the limiting frame 19 between the fifth arc-shaped groove 24 and the fifth limiting post 29. The airflow regulating mechanism 15 includes a first opening and closing block 36. A second opening and closing block 37 is movably installed on one side of the outer wall of the first opening and closing block 36. A third opening and closing block 38 is movably installed on the outer wall of the second opening and closing block 37 away from the first opening and closing block 36. A fourth opening and closing block 39 is movably installed on the outer wall of the third opening and closing block 38 away from the second opening and closing block 37. A fifth opening and closing block 40 is movably installed on the outer wall of the fourth opening and closing block 39 away from the third opening and closing block 38, and the outer wall of the fifth opening and closing block 40 is away from the fourth opening and closing block. One side of the first opening and closing block 39 is movably connected to the other side wall of the first opening and closing block 36. A first opening and closing arc-shaped groove 41 is provided on one side of the back of the first opening and closing block 36, and the first opening and closing arc-shaped groove 41 is movably connected to the outer wall of the first limiting post 25. A first opening and closing movable hole 42 is provided on the other side of the back of the first opening and closing block 36. A second opening and closing arc-shaped groove 43 is provided on one side of the back of the second opening and closing block 37, and the second opening and closing arc-shaped groove 43 is movably connected to the outer wall of the second limiting post 26. A second opening and closing movable hole 44 is provided on the other side of the back of the second opening and closing block 37. A third opening and closing arc-shaped groove 45 is provided on one side of the back of the third opening and closing block 38, and the third opening and closing arc-shaped groove 45 is movably connected to the outer wall of the third limiting post 27. A third opening and closing movable hole 44 is provided on the other side of the back of the third opening and closing block 38. The fourth opening and closing block 39 has a moving hole 46. A fourth opening and closing arc-shaped groove 47 is provided on one side of its back surface, and this groove 47 is movably connected to the outer wall of the fourth limiting post 28. A fourth opening and closing movable hole 48 is provided on the other side of the back surface of the fourth opening and closing block 39. A fifth opening and closing arc-shaped groove 49 is provided on one side of the back surface of the fifth opening and closing block 40, and this groove 49 is movably connected to the outer wall of the fifth limiting post 29. A fifth opening and closing movable hole 50 is provided on the other side of the back surface of the fifth opening and closing block 40. By incorporating an eccentric wheel 13, a connecting rod 14, and a rotating ring assembly 16, the rotation of the eccentric wheel 13 drives the rotating ring assembly 16 to reciprocate via the connecting rod 14. The rotating ring assembly 16 then drives the airflow regulating mechanism 15 to open and close on the limiting and holding mechanism 10. The overall structure is simple.The opening and closing size of the airflow regulating mechanism 15 can be precisely controlled according to the rotation of the output end of the servo motor 12.

[0027] Example 3: Based on Examples 1 and 2, as follows Figure 4 As shown, the rotating ring assembly 16 includes a rotating ring body 30. A first movable locking post 31 is fixedly installed on the upper right side of the front of the rotating ring body 30, and the outer wall of the first movable locking post 31 movably passes through the first opening and closing movable hole 42 and is movably connected to the first arc-shaped groove 20. A second movable locking post 32 is fixedly installed on the upper right side of the front of the rotating ring body 30, and the outer wall of the second movable locking post 32 movably passes through the second opening and closing movable hole 44 and is movably connected to the second arc-shaped groove 21. A third movable locking post 33 is fixedly installed on the lower front of the rotating ring body 30, and the outer wall of the third movable locking post 33 movably passes through the third opening and closing movable hole 46 and is movably connected to the third arc-shaped groove 22. A fourth movable locking post 34 is fixedly installed on the lower left side of the front of the rotating ring body 30, and the outer wall of the fourth movable locking post 34 movably passes through the fourth opening and closing movable hole 48 and is movably connected to the fourth arc-shaped groove 23. A second movable locking post 33 is fixedly installed on the upper left side of the front of the rotating ring body 30. There is a fifth movable retaining post 35, and the outer wall of the fifth movable retaining post 35 is movable through the fifth opening and closing movable hole 50 and is movably connected to the fifth arc-shaped groove 24. By setting the first opening and closing arc-shaped groove 41, the second opening and closing arc-shaped groove 43, the third opening and closing arc-shaped groove 45, the fourth opening and closing arc-shaped groove 47, the fifth opening and closing arc-shaped groove 49, the first arc-shaped groove 20, the second arc-shaped groove 21, the third arc-shaped groove 22, the fourth arc-shaped groove 23, and the fifth arc-shaped groove 24, through the grooved method, are not completely through, so that the whole structure has a certain degree of sealing, ensuring that no slight gas flow occurs when the airflow regulating mechanism 15 is closed, thus ensuring the drying effect of the item.

[0028] The working principle of this utility model is as follows: By turning on the switch of the servo motor 12, the output end of the servo motor 12 drives the eccentric wheel 13 to start rotating. The eccentric wheel 13 drives the rotating ring assembly 16 to reciprocate through the connecting rod 14. The rotating ring assembly 16 drives the first opening and closing block 36, the second opening and closing block 37, the third opening and closing block 38, the fourth opening and closing block 39, and the fifth opening and closing block 40 to open and close on the limit holding mechanism 10 through the first movable locking pin 31, the second opening and closing block 32, the third movable locking pin 33, the fourth movable locking pin 34, and the fifth movable locking pin 35.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic purging device for an air-cooled desiccator comprising a position-limiting holding mechanism (10), characterized in that: The outer wall of the limiting retaining mechanism (10) is fixedly installed with a mounting bracket (11), the back of the limiting retaining mechanism (10) is fixedly installed with an air inlet pipe (17), the air inlet pipe (17) is in a circular tube shape, the back upper end of the limiting retaining mechanism (10) is fixedly installed with a servo motor (12), the output end of the servo motor (12) is movably penetrated through the front upper end of the limiting retaining mechanism (10), the output end of the servo motor (12) is fixedly installed with an eccentric wheel (13), the front side of the eccentric wheel (13) is movably installed with a connecting rod (14), the back lower end of the connecting rod (14) is movably installed with a rotating ring assembly (16), the rotating ring assembly (16) is in a circular ring shape, the back of the rotating ring assembly (16) is movably installed with an airflow adjusting mechanism (15), the front of the rotating ring assembly (16) is movably installed with an air outlet pipe (18), the air outlet pipe (18) is in a circular tube shape, the limiting retaining mechanism (10) comprises a limiting frame (19), the first arc-shaped groove (20) is formed in the front upper right side of the limiting frame (19), the airflow adjusting mechanism (15) comprises a first opening and closing block (36), the outer wall side of the first opening and closing block (36) is movably installed with a second opening and closing block (37), the rotating ring assembly (16) comprises a rotating ring body (30), the first movable clamping column (31) is fixedly installed on the front upper right side of the rotating ring body (30), and the outer wall of the first movable clamping column (31) is movably penetrated through the first opening and closing movable hole (42) and is movably connected with the first arc-shaped groove (20).

2. The automatic purging device of the air-cooled cold dryer according to claim 1, characterized in that: The second arc-shaped groove (21) is formed in the front right side of the limiting frame (19), the third arc-shaped groove (22) is formed in the front lower right side of the limiting frame (19), the fourth arc-shaped groove (23) is formed in the front lower left side of the limiting frame (19), the fifth arc-shaped groove (24) is formed in the front upper left side of the limiting frame (19), and the first limiting column (25) is fixedly installed between the first arc-shaped groove (20) and the second arc-shaped groove (21) on the front of the limiting frame (19).

3. The automatic purging device of the air-cooled cold dryer according to claim 1, characterized in that: The outer wall side of the second opening and closing block (37) away from the first opening and closing block (36) is movably installed with a third opening and closing block (38), the outer wall side of the third opening and closing block (38) away from the second opening and closing block (37) is movably installed with a fourth opening and closing block (39), the outer wall side of the fourth opening and closing block (39) away from the third opening and closing block (38) is movably installed with a fifth opening and closing block (40), and the outer wall side of the fifth opening and closing block (40) away from the fourth opening and closing block (39) is movably connected with the other side wall surface of the first opening and closing block (36).

4. The automatic purging device of the air-cooled cold dryer according to claim 1, characterized in that: The second movable clamping column (32) is fixedly installed on the front right side of the rotating ring body (30), the outer wall of the second movable clamping column (32) is movably penetrated through the second opening and closing movable hole (44) and is movably connected with the second arc-shaped groove (21), the third movable clamping column (33) is fixedly installed on the front lower end of the rotating ring body (30), and the outer wall of the third movable clamping column (33) is movably penetrated through the third opening and closing movable hole (46) and is movably connected with the third arc-shaped groove (22).

5. The automatic purging device of the air-cooled cold dryer according to claim 1, characterized in that: The front face of the limiting frame (19) is fixedly installed with a second limiting column (26) between the second arc-shaped groove (21) and the third arc-shaped groove (22), the front face of the limiting frame (19) is fixedly installed with a third limiting column (27) between the third arc-shaped groove (22) and the fourth arc-shaped groove (23), the front face of the limiting frame (19) is fixedly installed with a fourth limiting column (28) between the fourth arc-shaped groove (23) and the fifth arc-shaped groove (24), and the front face of the limiting frame (19) is fixedly installed with a fifth limiting column (29) between the fifth arc-shaped groove (24) and the fifth limiting column (29).

6. The automatic purging device of the air-cooled cold dryer according to claim 1, characterized in that: The back side of the first opening and closing block (36) is provided with a first opening and closing arc-shaped groove (41), and the first opening and closing arc-shaped groove (41) is movably connected with the outer wall of the first limiting column (25); the other side of the back of the first opening and closing block (36) is provided with a first opening and closing movable hole (42).

7. The automatic purging device of the air-cooled cold dryer according to claim 1, characterized in that: The back side of the second opening and closing block (37) is provided with a second opening and closing arc-shaped groove (43), and the second opening and closing arc-shaped groove (43) is movably connected with the outer wall of the second limiting column (26); the other side of the back of the second opening and closing block (37) is provided with a second opening and closing movable hole (44), the back side of the third opening and closing block (38) is provided with a third opening and closing arc-shaped groove (45), and the third opening and closing arc-shaped groove (45) is movably connected with the outer wall of the third limiting column (27); the other side of the back of the third opening and closing block (38) is provided with a third opening and closing movable hole (46).

8. The automatic purging device of the air-cooled cold dryer according to claim 3, characterized in that: The back side of the fourth opening and closing block (39) is provided with a fourth opening and closing arc-shaped groove (47), and the fourth opening and closing arc-shaped groove (47) is movably connected with the outer wall of the fourth limiting column (28); the other side of the back of the fourth opening and closing block (39) is provided with a fourth opening and closing movable hole (48), the back side of the fifth opening and closing block (40) is provided with a fifth opening and closing arc-shaped groove (49), and the fifth opening and closing arc-shaped groove (49) is movably connected with the outer wall of the fifth limiting column (29); the other side of the back of the fifth opening and closing block (40) is provided with a fifth opening and closing movable hole (50).

9. The automatic purging device of the air-cooled cold dryer according to claim 1, characterized in that: The front lower left side of the rotating ring body (30) is fixedly installed with a fourth movable clamping column (34), and the outer wall of the fourth movable clamping column (34) movably penetrates the fourth opening and closing movable hole (48) and is movably connected with the fourth arc-shaped groove (23); the front upper left side of the rotating ring body (30) is fixedly installed with a fifth movable clamping column (35), and the outer wall of the fifth movable clamping column (35) movably penetrates the fifth opening and closing movable hole (50) and is movably connected with the fifth arc-shaped groove (24).

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