An impeller anti-corrosion treatment device for processing air cooler accessories

Abstract

The present invention discloses an impeller anti-corrosion processing device for processing cold air machine accessories, comprising: a spray chamber, a fixed cover is installed on the top of the spray chamber, a perspective mirror is installed on the fixed cover, a sealing cover, the sealing cover is rotatably arranged on the top of the fixed cover, a recovery mechanism, the recovery mechanism is arranged inside the spray chamber, the recovery mechanism is used to recover excess paint to reduce loss during use, a transmission mechanism, the transmission mechanism is arranged at the bottom of the inner wall of the spray chamber, the transmission mechanism and the recovery mechanism are concentrically arranged, and a separation mechanism, the separation mechanism is evenly arranged inside the recovery mechanism; compared with the prior art, the present invention can insert the impeller on the tapered rod when it is necessary to position the impeller, and at the same time, the limit shaft can be inserted on the top of the compression rod, and the positioning frame can be clamped inside the circular groove on the impeller, so that it can be quickly positioned, avoiding the need for adjustment of impellers of different models before processing, and improving the processing efficiency of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of processing accessories for air coolers, and in particular to an impeller anti-corrosion processing device for processing accessories for air coolers. Background Art

[0002] A fan is a mechanical device that utilizes the principle of evaporative cooling and has the dual functions of cooling and humidifying. It is commonly used in textile and knitting workshops to reduce the temperature in the workshop. Since the air is always introduced from the outside into the room, it is called a positive pressure system, so it can keep the indoor air fresh, increase the air humidity, and force the suspended particles in the air to settle, thereby purifying the air. The impeller is an important accessory in the air cooler. During the production process, its surface needs to be sprayed to prevent corrosion on the surface during subsequent use, which affects the normal operation of the equipment. However, during the coating process of the impeller, due to the different curvatures and materials of impellers of different models, omissions often occur during the spraying process, which requires operators to observe and fill in the gaps, reducing the processing efficiency of the equipment. For this reason, we propose an impeller anti-corrosion treatment device for processing air cooler accessories to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide an impeller anti-corrosion treatment device for processing air cooler accessories to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an impeller anti-corrosion treatment device for processing air cooler accessories, comprising:

[0005] A spraying room, wherein a fixed cover is installed on the top of the spraying room, and a perspective mirror is installed on the fixed cover;

[0006] A sealing cover, the sealing cover is rotatably arranged on the top of the fixed cover;

[0007] A recycling mechanism, which is arranged inside the spraying room and is used to recycle excess paint to reduce loss during use;

[0008] A transmission mechanism, the transmission mechanism is arranged at the bottom of the inner wall of the spray chamber, and the transmission mechanism and the recovery mechanism are arranged concentrically;

[0009] A separation mechanism, wherein the separation mechanism is evenly arranged inside the recovery mechanism;

[0010] The spraying mechanism is arranged at the bottom of the fixed cover, and the bottom of the fixed cover is fixedly connected with a transmission ring. The spraying mechanism is rotatably arranged at the bottom of the transmission ring. When the impeller needs to be subjected to anti-corrosion spraying treatment, it can be clamped on the transmission mechanism. Under the action of the spraying mechanism, the paint can be evenly sprayed on the impeller to avoid omissions in dead corners, and under the action of the recovery mechanism and the separation mechanism, the excess paint can be screened and recovered to avoid waste.

[0011] Preferably, the recovery mechanism comprises a collecting ring, a separating ring and a collecting box, the collecting ring is mounted on the bottom of the inner wall of the spray chamber, an annular cover is mounted on the top of the collecting ring, the separating ring is clamped inside the collecting ring, an annular sieve plate is mounted on the side wall of the separating ring, a grid ring is clamped inside the separating ring, a circular groove is formed on the grid ring, and the separating mechanism is clamped inside the circular groove;

[0012] The collecting box is installed on the inner wall of the collecting ring, and an elastic screen plate is installed on the top of the collecting box. Excess paint can be collected into the collecting box along the elastic screen plate, and the bottom of the transmission plate can rub and squeeze against the elastic screen plate, which can reduce the blockage caused by the drying of the paint.

[0013] Preferably, the transmission mechanism comprises a tapered rod, a compression ring, a transmission plate and a limit shaft, a control motor is installed at the bottom of the inner wall of the spray chamber, the bottom of the tapered rod is installed on the output end of the control motor, the compression ring is installed on the side wall of the tapered rod, the transmission plate is installed at the bottom of the compression ring, the transmission plate is against the top of the collection box, and the bottom of the transmission plate and the elastic screen plate rub against each other during the transmission process;

[0014] The top of the conical rod is fixedly connected to a compression rod, and the limiting shaft is inserted at the top of the compression rod. When the impeller needs to be positioned, the impeller can be inserted on the conical rod, and the limiting shaft can be inserted at the top of the compression rod. The positioning frame can be clamped in the circular groove on the impeller, so that it can be quickly positioned, avoiding the need to adjust impellers of different models before processing.

[0015] Preferably, a pneumatic ring is fixedly connected inside the limiting shaft, and a plurality of positioning frames are fixedly connected to the bottom of the pneumatic ring, the positioning frames are conical, and a buffer shaft is fixedly connected to the side wall of the positioning frame, and the buffer shaft is made of rubber;

[0016] A buffer plate is rotatably provided at the bottom of the sealing cover, and the bottom of the buffer plate is against the top of the limiting shaft. The compression rod can squeeze the air pressure ring against each other, so that the positioning frame can swing. During the positioning process, the buffer shaft can be against the inside of the circular groove on the impeller, which can play a buffering role.

[0017] Preferably, the separation mechanism comprises a collecting tube, a hollow tube and a movable block, the hollow tube is inserted into the circular groove and the annular array is arranged on the grid ring, the collecting tube is fixedly connected to the top of the hollow tube, and a plurality of fixing grooves are opened on the hollow tube;

[0018] The movable block is disc-shaped and is movably arranged inside a hollow tube. A plurality of adsorption sheets are fixedly connected to the hollow tube, and the adsorption sheets are located inside a fixed groove. A plurality of reset shafts are fixedly connected to the top of the movable block, and one end of the reset shaft is installed on the top of a collecting tube. The grid ring can screen the coating to remove impurities.

[0019] Preferably, a suspension block is fixedly connected to the bottom of the movable block, the suspension block is conical, and a plurality of adsorption shafts are fixedly connected to the side wall of the suspension block. The adsorption shafts are against the inner wall of the hollow tube during the transmission process, and the paint can be transmitted from the collection box to the inside of the collection ring. The suspension block can float on the surface of the paint under the action of buoyancy, and the adsorption shafts can collect and process the dried powder and debris floating on the surface of the paint.

[0020] Preferably, the spraying mechanism comprises a movable ring, a transmission plate, and a limiting frame, wherein the movable ring is rotatably arranged at the bottom of the transmission ring, a plurality of arc-shaped sheets are fixedly connected to the inner wall of the movable ring, a plurality of fixed rods are fixedly connected to the side wall of the limiting frame, and one end of the fixed rod is clamped on the inner wall of the transmission ring. When the impeller needs to be sprayed, the external device can transfer the paint to the inside of the movable ring, and the movable ring can be driven to rotate on the transmission ring under the action of the arc plate, so that the impeller surface can be evenly sprayed;

[0021] A plurality of transmission plates are fixedly connected to the side wall of the movable ring, the transmission plates are elastic, the transmission plates and the movable ring are interconnected, one end of the transmission plate is fixedly connected to an atomizing nozzle, the top of the transmission plate is fixedly connected to a straight rod, and the top end of the straight rod is fixedly connected to a limiting ring, one end of the limiting ring is movably clamped on the outer wall of the limiting frame, and the limiting ring moves on the limiting frame to drive the angle of the transmission plate to change, so that the impeller surface can be quickly sprayed from multiple angles and can adapt to impellers of different models.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. When the impeller needs to be positioned, the present invention can insert the impeller on the tapered rod, and at the same time, the limit shaft can be inserted on the top of the compression rod, and the positioning frame can be clamped inside the circular groove on the impeller, so that it can be quickly positioned, avoiding the need for adjustment of impellers of different models before processing, and improving the processing efficiency of the equipment;

[0024] 2. The present invention can squeeze the compression rod and the air pressure ring to make the positioning frame swing, and can make the buffer shaft abut against the inside of the circular groove on the impeller during the positioning process, so as to play a buffering role, avoid the occurrence of indentations during the positioning process, and reduce the occurrence of problems in the subsequent assembly process;

[0025] 3. When the impeller needs to be sprayed, the external device can transfer the paint to the inside of the movable ring, and the movable ring can be driven to rotate on the transmission ring under the action of the arc plate, so that the impeller surface can be evenly sprayed to reduce the omission of dead corners;

[0026] 4. The present invention can drive the angle of the transmission plate to change by moving the limit ring on the limit frame, can quickly spray the impeller surface from multiple angles, can adapt to impellers of different models, does not require operators to make adjustments, can save operating time, and improve spraying efficiency;

[0027] 5. The present invention can transfer the paint from the collection box to the inside of the collection ring, the suspension block can float on the surface of the paint under the action of buoyancy, the adsorption shaft can collect and process the dried powder and debris floating on the surface of the paint, and can separate the paint for subsequent collection and recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the sealing cover structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of the spray chamber of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the recovery mechanism of the present invention;

[0032] Figure 5 It is a schematic diagram of the local structure of the transmission mechanism of the present invention;

[0033] Figure 6 It is a schematic cross-sectional structural diagram of the separation mechanism of the present invention;

[0034] Figure 7 This is a schematic diagram of the bottom structure of the annular cover of the present invention;

[0035] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram in the middle;

[0036] In the figure: 1. spray chamber; 2. sealing cover; 3. recovery mechanism; 4. transmission mechanism; 5. separation mechanism; 6. spray mechanism; 11. fixed cover; 12. perspective mirror; 13. transmission ring; 21. buffer plate; 31. collection ring; 32. separation ring; 33. grid ring; 34. collection box; 41. tapered rod; 42. compression ring; 43. transmission plate; 44. limiting shaft; 45. compression rod; 46. positioning frame; 461. buffer shaft; 51. collection tube; 52. hollow tube; 53. movable block; 54. reset shaft; 55. suspension block; 551. adsorption shaft; 61. movable ring; 62. transmission plate; 63. atomizing nozzle; 64. limiting frame; 641. fixed rod; 65. limiting ring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-8 The present invention provides a technical solution: an impeller anti-corrosion treatment device for processing air cooler accessories, comprising:

[0039] A spraying room 1, a fixed cover 11 is installed on the top of the spraying room 1, and a perspective mirror 12 is installed on the fixed cover 11;

[0040] A sealing cover 2, the sealing cover 2 is rotatably arranged on the top of the fixed cover 11;

[0041] A recycling mechanism 3 is arranged inside the spraying room 1 and is used to recycle excess paint to reduce loss during use;

[0042] The transmission mechanism 4 is arranged at the bottom of the inner wall of the spray chamber 1, and the transmission mechanism 4 is arranged concentrically with the recovery mechanism 3;

[0043] The separation mechanism 5 is evenly arranged inside the recovery mechanism 3;

[0044] The spraying mechanism 6 is arranged at the bottom of the fixed cover 11, and the bottom of the fixed cover 11 is fixedly connected with a transmission ring 13. The spraying mechanism 6 is rotatably arranged at the bottom of the transmission ring 13. When the impeller needs to be treated with anti-corrosion spraying, it can be clamped on the transmission mechanism 4. Under the action of the spraying mechanism 6, the paint can be evenly sprayed on the impeller to avoid omissions in dead corners, and under the action of the recovery mechanism 3 and the separation mechanism 5, the excess paint can be screened and recovered to avoid waste.

[0045] The recovery mechanism 3 includes a collecting ring 31, a separating ring 32 and a collecting box 34. The collecting ring 31 is installed at the bottom of the inner wall of the spray chamber 1. An annular cover is installed on the top of the collecting ring 31. The separating ring 32 is clamped inside the collecting ring 31. An annular sieve plate is installed on the side wall of the separating ring 32. A grid ring 33 is clamped inside the separating ring 32. A circular groove is opened on the grid ring 33. The separating mechanism 5 is clamped inside the circular groove.

[0046] The collecting box 34 is installed on the inner wall of the collecting ring 31, and an elastic screen plate is installed on the top of the collecting box 34. The excess paint can be collected into the collecting box 34 along the elastic screen plate, and the bottom of the transmission plate 43 can rub and squeeze with the elastic screen plate, which can reduce the blockage caused by the drying of the paint.

[0047] The transmission mechanism 4 includes a tapered rod 41, a compression ring 42, a transmission plate 43 and a limit shaft 44. A control motor is installed at the bottom of the inner wall of the spray chamber 1. The bottom of the tapered rod 41 is installed on the output end of the control motor. The compression ring 42 is installed on the side wall of the tapered rod 41. The transmission plate 43 is installed at the bottom of the compression ring 42. The transmission plate 43 is against the top of the collection box 34. During the transmission process, the bottom of the transmission plate 43 rubs against the elastic screen plate.

[0048] A compression rod 45 is fixedly connected to the top of the conical rod 41, and a limiting shaft 44 is inserted at the top of the compression rod 45. When the impeller needs to be positioned, the impeller can be inserted on the conical rod 41, and the limiting shaft 44 can be inserted at the top of the compression rod 45. The positioning frame 46 can be clamped in the circular groove on the impeller, so that it can be quickly positioned, avoiding the need to adjust impellers of different models before processing, and improving the processing efficiency of the equipment.

[0049] The limiting shaft 44 is fixedly connected with a pneumatic ring inside, and a plurality of positioning frames 46 are fixedly connected to the bottom of the pneumatic ring. The positioning frames 46 are conical, and a buffer shaft 461 is fixedly connected to the side wall of the positioning frame 46. The buffer shaft 461 is made of rubber.

[0050] A buffer plate 21 is rotatably provided at the bottom of the sealing cover 2, and the bottom of the buffer plate 21 is against the top of the limiting shaft 44. The compression rod 45 can be squeezed against the air pressure ring to make the positioning frame 46 swing. During the positioning process, the buffer shaft 461 can be against the inside of the circular groove on the impeller, which can play a buffering role and avoid indentations during the positioning process.

[0051] The separation mechanism 5 includes a collecting tube 51, a hollow tube 52 and a movable block 53. The hollow tube 52 is inserted into the circular groove and the annular array is arranged on the grid ring 33. The collecting tube 51 is fixedly connected to the top of the hollow tube 52. A plurality of fixed grooves are opened on the hollow tube 52.

[0052] The movable block 53 is disc-shaped and is movably arranged inside the hollow tube 52. A plurality of adsorption sheets are fixedly connected to the hollow tube 52, and the adsorption sheets are located inside the fixed groove. A plurality of reset shafts 54 are fixedly connected to the top of the movable block 53, and one end of the reset shaft 54 ​​is installed on the top of the collecting tube 51. The grid ring 33 can screen the paint and remove impurities.

[0053] A suspension block 55 is fixedly connected to the bottom of the movable block 53. The suspension block 55 is conical, and a plurality of adsorption shafts 551 are fixedly connected to the side wall of the suspension block 55. The adsorption shafts 551 abut against the inner wall of the hollow tube 52 during the transmission process, and the paint can be transmitted from the collection box 34 to the inside of the collection ring 31. The suspension block 55 can float on the surface of the paint under the action of buoyancy, and the adsorption shafts 551 can collect and process the dried powder and debris floating on the surface of the paint, and can separate the paint for subsequent collection and recycling.

[0054] The spraying mechanism 6 includes a movable ring 61, a transmission plate 62, and a limiting frame 64. The movable ring 61 is rotatably arranged at the bottom of the transmission ring 13. A plurality of arc-shaped pieces are fixedly connected to the inner wall of the movable ring 61. A plurality of fixed rods 641 are fixedly connected to the side wall of the limiting frame 64. One end of the fixed rod 641 is clamped on the inner wall of the transmission ring 13. When the impeller needs to be sprayed, the external device can transfer the paint to the inside of the movable ring 61. Under the action of the arc plate, the movable ring 61 can be driven to rotate on the transmission ring 13, so that the impeller surface can be evenly sprayed to reduce the possibility of omissions.

[0055] A plurality of transmission plates 62 are fixedly connected to the side wall of the movable ring 61. The transmission plates 62 are elastic and interpenetrate with the movable ring 61. An atomizing nozzle 63 is fixedly connected to one end of the transmission plate 62. A straight rod is fixedly connected to the top of the transmission plate 62, and a limiting ring 65 is fixedly connected to the top of the straight rod. One end of the limiting ring 65 is movably clamped on the outer wall of the limiting frame 64. By moving the limiting ring 65 on the limiting frame 64, the angle of the transmission plate 62 can be driven to change, and the impeller surface can be quickly sprayed from multiple angles. It can adapt to impellers of different models without the need for adjustment by the operator.

[0056] Working principle: first, when the impeller needs to be subjected to anti-corrosion spraying, it can be clamped on the transmission mechanism 4, and the coating can be evenly sprayed on the impeller under the action of the spraying mechanism 6 to avoid omissions in dead corners, and under the action of the recovery mechanism 3 and the separation mechanism 5, the excess coating can be sieved and recovered to avoid waste, and when the impeller needs to be positioned, the impeller can be inserted on the tapered rod 41, and the limit shaft 44 can be inserted on the top of the compression rod 45, and the positioning frame 46 can be clamped inside the circular groove on the impeller, so that it can be quickly positioned to avoid the need for adjustment of impellers of different models before processing, and to improve the processing efficiency of the equipment, and as the compression rod 45 can be squeezed against the air pressure ring, the positioning frame 46 can swing, and the buffer shaft 461 can be pressed against the inside of the circular groove on the impeller during the positioning process, which can play a buffering role and avoid the occurrence of indentations during the positioning process;

[0057] Then, when the impeller needs to be sprayed, the external equipment can transfer the paint to the inside of the movable ring 61, and under the action of the arc plate, the movable ring 61 can be driven to rotate on the transmission ring 13, so that the impeller surface can be evenly sprayed to reduce the omission. As the limit ring 65 moves on the limit frame 64, the angle of the transmission plate 62 can be driven to change, and the impeller surface can be quickly sprayed from multiple angles. It can adapt to different types of impellers without the need for operators to make adjustments.

[0058] Finally, excess paint can be collected into the collection box 34 along the elastic screen plate, and the bottom of the transmission plate 43 can rub and squeeze against the elastic screen plate, which can reduce the blockage caused by the drying of the paint, and the paint can be transferred from the collection box 34 to the inside of the collection ring 31. The suspension block 55 can float on the surface of the paint under the action of buoyancy, and the adsorption shaft 551 can collect and process the dried powder and debris floating on the surface of the paint, and can separate the paint for subsequent collection and recycling.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impeller anti-corrosion treatment device for processing air cooler accessories, characterized in that: include, A spraying room (1), wherein a fixed cover (11) is installed on the top of the spraying room (1), and a perspective mirror (12) is installed on the fixed cover (11); A sealing cover (2), the sealing cover (2) being rotatably disposed on the top of the fixed cover (11); A recovery mechanism (3), the recovery mechanism (3) being arranged inside the spray chamber (1), the recovery mechanism (3) being used to recover excess paint to reduce loss during use; The recovery mechanism (3) comprises a collecting ring (31), a separating ring (32) and a collecting box (34); the collecting ring (31) is mounted on the bottom of the inner wall of the spray chamber (1); an annular cover is mounted on the top of the collecting ring (31); the separating ring (32) is clamped inside the collecting ring (31); an annular sieve plate is mounted on the side wall of the separating ring (32); a grid ring (33) is clamped inside the separating ring (32); a circular groove is formed on the grid ring (33); and the separating mechanism (5) is clamped inside the circular groove; The collecting box (34) is mounted on the inner wall of the collecting ring (31), and an elastic sieve plate is mounted on the top of the collecting box (34); A transmission mechanism (4), the transmission mechanism (4) being arranged at the bottom of the inner wall of the spray chamber (1), the transmission mechanism (4) being arranged concentrically with the recovery mechanism (3); The transmission mechanism (4) comprises a conical rod (41), a compression ring (42), a transmission plate (43) and a limit shaft (44); a control motor is installed at the bottom of the inner wall of the spray chamber (1); the bottom of the conical rod (41) is installed on the output end of the control motor; the compression ring (42) is installed on the side wall of the conical rod (41); the transmission plate (43) is installed at the bottom of the compression ring (42); the transmission plate (43) is against the top of the collection box (34); and during the transmission process, the bottom of the transmission plate (43) rubs against the elastic screen plate; The top of the tapered rod (41) is fixedly connected to a compression rod (45), and the limiting shaft (44) is inserted into the top of the compression rod (45); A separation mechanism (5), wherein the separation mechanism (5) is evenly arranged inside the recovery mechanism (3); The separation mechanism (5) comprises a collecting tube (51), a hollow tube (52) and a movable block (53); the hollow tube (52) is inserted into the circular groove and arranged in an annular array on the grid ring (33); the collecting tube (51) is fixedly connected to the top of the hollow tube (52); and a plurality of fixing grooves are provided on the hollow tube (52); The movable block (53) is in the shape of a disk. The movable block (53) is movably arranged inside the hollow tube (52). A plurality of adsorption sheets are fixedly connected to the hollow tube (52), and the adsorption sheets are located inside the fixed groove. A plurality of reset shafts (54) are fixedly connected to the top of the movable block (53), and one end of the reset shaft (54) is mounted on the top of the collection tube (51); A spraying mechanism (6), wherein the spraying mechanism (6) is arranged at the bottom of the fixed cover (11), a transmission ring (13) is fixedly connected to the bottom of the fixed cover (11), and the spraying mechanism (6) is rotatably arranged at the bottom of the transmission ring (13).

2. The impeller anti-corrosion treatment device for processing air cooler parts according to claim 1, characterized in that: A pneumatic ring is fixedly connected inside the limiting shaft (44), and a plurality of positioning frames (46) are fixedly connected to the bottom of the pneumatic ring. The positioning frames (46) are conical in shape, and a buffer shaft (461) is fixedly connected to the side wall of the positioning frame (46). The buffer shaft (461) is made of rubber. A buffer plate (21) is rotatably provided at the bottom of the sealing cover (2), and the bottom of the buffer plate (21) abuts against the top of the limiting shaft (44).

3. The impeller anti-corrosion treatment device for processing air cooler parts according to claim 1, characterized in that: The bottom of the movable block (53) is fixedly connected to a suspension block (55), the suspension block (55) is conical, and a plurality of adsorption shafts (551) are fixedly connected to the side wall of the suspension block (55), and the adsorption shafts (551) abut against the inner wall of the hollow tube (52) during the transmission process.

4. The impeller anti-corrosion treatment device for processing air cooler parts according to claim 1, characterized in that: The spraying mechanism (6) comprises a movable ring (61), a transmission plate (62), and a limiting frame (64); the movable ring (61) is rotatably arranged at the bottom of the transmission ring (13); a plurality of arc-shaped pieces are fixedly connected to the inner wall of the movable ring (61); a plurality of fixing rods (641) are fixedly connected to the side wall of the limiting frame (64); one end of the fixing rod (641) is clamped on the inner wall of the transmission ring (13); A plurality of transmission plates (62) are fixedly connected to the side wall of the movable ring (61); the transmission plates (62) are elastic and interpenetrate the movable ring (61); one end of the transmission plate (62) is fixedly connected to an atomizing nozzle (63); a straight rod is fixedly connected to the top of the transmission plate (62); and a limiting ring (65) is fixedly connected to the top of the straight rod; one end of the limiting ring (65) is movably clamped on the outer wall of the limiting frame (64).

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