CN214489472U

CN214489472U - Welding device of pipe making machine

Info

Publication number: CN214489472U
Application number: CN202120688486.8U
Authority: CN
Inventors: 陈桂丰; 任雪松; 曾嘉源
Original assignee: Foshan Yiding Pipe Co ltd
Current assignee: Foshan Yiding Pipe Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-10-26
Anticipated expiration: 2031-04-02

Abstract

The utility model belongs to the technical field of the technique of tuber and specifically relates to a welding set of tuber, it includes fixing base, stay tube and welding pen, the top lateral wall of fixing base is provided with adjusts the seat, it keeps away from to adjust the seat one side of fixing base is provided with adjusts the pole, it is provided with and is used for driving to adjust the seat adjust pole removal adjustment mechanism, it is equipped with the shift ring to adjust the pole and go up the shift ring, the shift ring is fixed in through the mounting on the regulation pole, the outside of shift ring is provided with the connecting rod, the other end of connecting rod through fixed subassembly with the stay tube is connected, the welding pen set up in the one end of stay tube. This application has the effect that improves welding pen's application scope.

Description

Welding device of pipe making machine

Technical Field

The application relates to the technical field of pipe making machines, in particular to a welding device of a pipe making machine.

Background

The tube making machine is also called a tube welding machine, a tube making machine set and a tube welding machine set. The pipe making machine is mainly divided into two major categories: one of them is a common high-frequency pipe welding machine, and the other is a stainless steel pipe welding machine. The high-frequency welded pipe is mainly used for producing various iron pipes, water pipes and the like; the stainless steel pipe machine is mainly used for producing various stainless steel decorative pipes.

The existing process production flow of the pipe making machine is formed by uncoiling, forming, welding, polishing, sizing, straightening, sizing, cutting and the like in sequence, and in the welding production process, a worker generally directly fixes a welding pen on one side of a forming discharge end of the pipe making machine. When the stainless steel pipe is output from the forming discharge end of the pipe making machine, the welding pen welds the curled edges at the two sides of the stainless steel pipe, so that the outer surface of the stainless steel pipe is in a closed loop.

In view of the above-described related art, the inventors considered that since stainless steel pipes have different diameter sizes, a welding pen fixed on the side of the discharge end of the tube maker cannot be positionally adjusted according to the diameter size of the stainless steel pipe.

SUMMERY OF THE UTILITY MODEL

In order to improve the application scope of welding pen, this application provides a welding set of tuber.

The application provides a welding set of tuber, adopts following technical scheme:

the utility model provides a welding set of tuber, includes fixing base, stay tube and welding pen, the top lateral wall of fixing base is provided with adjusts the seat, it keeps away from to adjust the seat one side of fixing base is provided with adjusts the pole, it is provided with and is used for driving to adjust the seat adjust the pole and remove adjustment mechanism, it is equipped with the shift ring to remove the cover on the regulation pole, the shift ring is fixed in through the mounting on the regulation pole, the outside of shift ring is provided with the connecting rod, the other end of connecting rod through fixed subassembly with the stay tube is connected, the welding pen set up in the one end of stay tube.

Through adopting above-mentioned technical scheme, when needs weld the nonrust steel pipe of different diameters, the staff earlier through fixed subassembly with connecting rod and stay tube fixed connection, then remove the shift ring to required position along the length direction of regulating lever, be fixed in the regulation pole through the mounting with the shift ring after that, the position of regulating lever is finely tuned to last rethread adjustment mechanism, finally make the welding pen aim at the welding department of the nonrust steel pipe of different diameters, and then be favorable to improving the application scope of welding pen.

Optionally, the adjustment mechanism including slide set up in adjust the removal seat of seat one side, be used for driving remove the gliding sliding component of seat, slide set up in remove the lift seat of seat one side, be used for driving the removal subassembly that the lift seat removed and be used for driving adjust the lifting unit that the pole goes up and down.

Through adopting above-mentioned technical scheme, when the position of adjusting the pole needs to be carried out the fine setting, the staff can adjust the horizontal position of adjusting the pole through slip subassembly and removal subassembly earlier, then the rethread lifting unit adjusts the high position of adjusting the pole, adjusts welding pen at level and high position finally to the regulation pole, and then is favorable to improving welding pen's application scope.

Optionally, the sliding assembly includes slider, first lead screw and first hand wheel, adjust the seat and deviate from one side of fixing base is followed the length direction who adjusts the seat has seted up the spout, the slider slide set up in the spout, one side of slider is run through the spout and is extended to outside adjusting the seat lateral wall, one side of slider with it is connected to remove the seat, first lead screw rotate set up in the spout, first lead screw run through the slider and with slider threaded connection, the one end of first lead screw run through the spout and with first hand wheel is connected.

Through adopting above-mentioned technical scheme, when the staff rotated first finger, first finger drove first lead screw and rotates, and first lead screw drives the slider and slides along the length direction who adjusts the seat, and the slider drives and removes the seat and slide along the length direction who adjusts the seat, and then is favorable to improving the stability that the welding pen adjusted along the length direction who adjusts the seat.

Optionally, the moving assembly includes a moving block, a second lead screw and a second hand wheel, a moving groove is formed in one side of the moving seat, which is far away from the fixed seat, along the length direction of the moving seat, the moving block is slidably disposed in the moving groove, one side of the moving block penetrates through the moving groove and extends out of the side wall of the moving seat, one side of the moving block is connected with the lifting seat, the second lead screw is rotatably disposed in the moving groove, the second lead screw penetrates through the moving block and is in threaded connection with the moving block, and one end of the second lead screw penetrates through the moving groove and is connected with the second hand wheel.

Through adopting above-mentioned technical scheme, when the staff rotated the second hand wheel, the second hand wheel drove the second lead screw and rotated, and the second lead screw drives the movable block and slides along the length direction who removes the seat, and the movable block drives the lift seat and slides along the length direction who removes the seat, and then is favorable to improving the welding pen and carries out the stability adjusted along the length direction who removes the seat.

Optionally, the lifting assembly includes elevator, third lead screw and third hand wheel, the lift seat is kept away from remove one side of seat and is followed the lift groove has been seted up to the vertical direction of lift seat, the elevator slide set up in the lift inslot, one side of elevator runs through the lift groove extends to outside the lift seat lateral wall, one side of lift seat with adjust the pole and be connected, the third lead screw rotate set up in the lift inslot, the third lead screw runs through the elevator and with elevator threaded connection, the top of third lead screw runs through the lift groove and with the third hand wheel is connected.

Through adopting above-mentioned technical scheme, when the staff rotated the third hand wheel, the third hand wheel drove the third lead screw and rotated, and the third lead screw drives the elevator and goes up and down along the vertical direction of lift seat, and the elevator drives and drives the vertical direction lift of adjusting the pole along the lift seat, and then is favorable to improving the stability that the welding pen adjusted along the vertical direction of lift seat.

Optionally, the fixing member is a fixing bolt, the fixing bolt is disposed on one side of the moving ring, one end of the fixing bolt penetrates through the moving ring and extends into the moving ring, the fixing bolt is in threaded connection with the moving ring, and one end of the fixing bolt abuts against the side wall of the adjusting rod.

Through adopting above-mentioned technical scheme, when the staff screwed up fixing bolt, fixing bolt supported tightly in the lateral wall of adjusting the pole this moment, and the shift ring is fixed in on adjusting the pole, and then is favorable to improving the shift ring and slides and can fix the stability on adjusting the pole.

Optionally, the fixing assembly includes a locking ring, a locking bolt and a locking nut, one side of the locking ring is open, the supporting tube is sleeved with the locking ring, the other end of the connecting rod is connected with the outer side of the locking ring, fixing lugs are respectively arranged on two sides of the open end of the locking ring, one side of the locking bolt penetrates through the fixing lugs and extends to the outside of the side wall of the fixing lugs, and the locking nut is in threaded connection with one end of the locking bolt.

By adopting the technical scheme, when the supporting pipe needs to be fixed, a worker firstly sleeves the locking ring on the supporting pipe, then penetrates the locking bolt through the fixing lug, then screws the locking nut, and then tightly fastens the supporting pipe by the locking ring, so that the stability that the supporting pipe is connected with the connecting pipe is favorably improved.

Optionally, the connecting rod includes a first sub-hinge rod and a second sub-hinge rod, one end of the first sub-hinge rod is connected to the outer side of the moving ring, one end of the second sub-hinge rod is connected to the outer side of the locking ring, and the other end of the first sub-hinge rod is hinged to the other end of the second sub-hinge rod through a hinge bolt.

Through adopting above-mentioned technical scheme, when the welding angle of welding pen is adjusted to needs, the articulated sub-pole of staff accessible articulated bolt swing second, and the articulated sub-pole of second passes through the catch and drives the stay tube swing, and the stay tube drives the welding pen swing, and when the staff screwed up articulated bolt, the welding pen was fixed in the current position this moment, and then is favorable to further improving the application scope of welding pen.

To sum up, the application comprises the following beneficial technical effects:

when needs weld the nonrust steel pipe of different diameters, the staff earlier through fixed subassembly with connecting rod and stay tube fixed connection, then moves the shift ring to required position along the length direction of adjusting lever, is fixed in the regulation pole through the mounting with the shift ring after that on, and the rethread adjustment mechanism finely tunes the position of adjusting lever at last, finally makes the welding pen aim at the welding department of the nonrust steel pipe of different diameters, and then is favorable to improving the application scope of welding pen.

Drawings

Fig. 1 is a first overall structural schematic diagram of a welding apparatus of a pipe making machine according to the present application.

Fig. 2 is a second overall structural schematic diagram of the welding apparatus of the pipe maker of the present application.

Description of reference numerals: 1. a fixed seat; 11. supporting a tube; 12. a welding pen; 13. adjusting a rod; 2. an adjusting seat; 21. a slider; 22. a first lead screw; 23. a first hand wheel; 24. a chute; 3. a moving ring; 4. a connecting rod; 41. a first hinge sub-bar; 42. a second hinge sub-bar; 43. a hinge bolt; 5. a movable seat; 51. a moving block; 52. a second lead screw; 53. a second hand wheel; 54. a moving groove; 6. a lifting seat; 61. a lifting block; 62. a third screw rod; 63. a third hand wheel; 64. a lifting groove; 7. fixing the bolt; 8. a locking ring; 81. locking the bolt; 82. locking the nut; 83. and fixing the ears.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

Example (b):

referring to fig. 1, a welding device of a pipe making machine includes a fixed base 1, a support pipe 11 and a welding pen 12. Fixing base 1 is vertical erects subaerially, and one side at fixing base 1's top is fixed to be provided with adjusts seat 2, adjusts seat 2 and is the cuboid form, and one side that fixing base 1 was kept away from to adjust seat 2 is provided with adjusts pole 13, adjusts pole 13 and is the level setting, and adjusts seat 2 and be provided with and be used for carrying out the adjustment mechanism of fine setting to the position of adjusting pole 13. The adjusting rod 13 is movably sleeved with a moving ring 3, and the moving ring 3 is fixed on the adjusting rod 13 through a fixing piece. The outside of shift ring 3 is provided with connecting rod 4, and the one end and the shift ring 3 fixed connection of connecting rod 4, and the other end of connecting rod 4 is the free end. The supporting tube 11 is arranged on one side of the fixed seat 1, one end of the supporting tube 11 is fixedly connected with the welding pen 12, and the free end of the connecting rod 4 is detachably connected with the supporting tube 11 through a fixing component.

Specifically, referring to fig. 1 and 2, to improve the ease of fine adjustment of the position of the welding pen 12, the adjustment mechanism includes a movable base 5 and a lift base 6. Remove seat 5 and be the cuboid form, and remove seat 5 and slide and set up in the one side that adjusts seat 2 and deviate from fixing base 1, and be provided with on adjusting seat 2 and be used for driving and remove seat 5 along the gliding sliding component of the length direction of adjusting seat 2. The lifting seat 6 is cuboid, the lifting seat 6 is movably arranged on one side of the movable seat 5 far away from the adjusting seat 2, and a movable component for driving the lifting seat 6 to slide along the length direction of the movable seat 5 is arranged on the movable seat 5. The adjusting rod 13 is movably arranged on one side of the lifting seat 6 departing from the moving seat 5, and a lifting assembly used for driving the adjusting rod 13 to lift along the vertical direction of the lifting seat 6 is arranged on the lifting seat 6.

Referring to fig. 1 and 2, in order to improve the stability of the sliding of the moving seat 5 along the length direction of the adjusting seat 2, the sliding assembly includes a sliding block 21, a first lead screw 22 and a first hand wheel 23. Adjust one side that seat 2 deviates from fixing base 1 and seted up spout 24 along the length direction who adjusts seat 2, slider 21 slides and sets up in spout 24, and slider 21 runs through spout 24 and extends to outside adjusting the lateral wall of seat 2 in one side that deviates from fixing base 1, and slider 21 deviates from one side of fixing base 1 and removes 5 fixed connection of seat. The first lead screw 22 is horizontally arranged, the first lead screw 22 is rotatably arranged in the chute 24, and the first lead screw 22 penetrates through the sliding block 21 and is in threaded connection with the sliding block 21. One end of the first screw rod 22, which faces away from the adjusting rod 13, penetrates through the sliding groove 24 and extends out of the side wall of the adjusting seat 2. The first hand wheel 23 is arranged on one side of the adjusting seat 2 departing from the adjusting rod 13, and the first hand wheel 23 and one end of the first lead screw 22 departing from the adjusting rod 13 are coaxially and fixedly connected.

When the worker rotates the first hand wheel 23, the first hand wheel 23 drives the first lead screw 22 to rotate, the first lead screw 22 drives the sliding block 21 to slide along the length direction of the adjusting base 2, and the sliding block 21 drives the moving block 51 to slide along the length direction of the adjusting base 2.

Referring to fig. 1 and 2, in order to improve the stability of the lifting base 6 sliding along the length direction of the movable base 5, the movable assembly includes a movable block 51, a second lead screw 52 and a second wheel 53. A moving groove 54 is formed in one side of the moving seat 5, which is far away from the adjusting seat 2, along the length direction of the moving seat 5, and the moving block 51 is slidably arranged in the moving groove 54. One side of the moving block 51 facing the adjusting rod 13 penetrates through the moving groove 54 and extends to the outside of the side wall of the moving seat 5, and one side of the moving block 51 facing the adjusting rod 13 is fixedly connected with the lifting seat 6. The second lead screw 52 is horizontally disposed, the second lead screw 52 is rotatably disposed in the moving groove 54, and the second lead screw 52 penetrates the moving block 51 and is threadedly connected with the moving block 51. One end of the second screw 52 facing away from the adjusting base 2 penetrates the moving groove 54 and extends out of the side wall of the adjusting base 2. The second hand wheel 53 is arranged on one side of the moving seat 5 departing from the adjusting seat 2, and the second hand wheel 53 is coaxially and fixedly connected with one end of the second screw rod 52 departing from the adjusting seat 2.

When the worker rotates the second hand wheel 53, the second hand wheel 53 drives the second lead screw 52 to rotate, the second lead screw 52 drives the moving block 51 to slide in the moving groove 54 along the length direction of the moving base 5, and the moving block 51 drives the lifting base 6 to slide along the length direction of the moving base 5.

Referring to fig. 1 and 2, in order to improve the stability of the adjustment rod 13 in the vertical direction of the lifting base 6, the lifting assembly includes a lifting block 61, a third screw 62 and a third hand wheel 63. Lifting groove 64 has been seted up along lifting seat 6's vertical direction to one side that lifting seat 6 deviates from to remove seat 5, and the elevator 61 slides and sets up in lifting groove 64, and outside the one side that elevator 61 deviates from to remove seat 5 ran through lifting groove 64 and extended to lifting seat 6's lateral wall, and the one end of adjusting pole 13 deviates from one side fixed connection who removes seat 5 with elevator 61. The third screw 62 is vertically arranged, the third screw 62 is rotatably arranged in the lifting groove 64, the third screw 62 penetrates through the lifting block 61 and is in threaded connection with the lifting block 61, and the top end of the third screw 62 penetrates through the lifting groove 64 and extends out of the top of the lifting seat 6. The third hand wheel 63 is arranged on the top of the lifting seat 6, and the third hand wheel 63 is coaxially and fixedly connected with the top end of the third screw rod 62.

When the worker rotates the third hand wheel 63, the third hand wheel 63 drives the third screw rod 62 to rotate, the third screw rod 62 drives the lifting block 61 to lift in the lifting groove 64, and the lifting block 61 drives the adjusting rod 13 to lift along the vertical direction of the lifting seat 6.

Specifically, referring to fig. 1 and 2, in order to improve the stability of the moving ring 3 fixed on the adjusting rod 13, the fixing member is a fixing bolt 7. Fixing bolt 7 rotates and sets up in the top of shift ring 3, and fixing bolt 7's output runs through shift ring 3 and extends to in the shift ring 3, and fixing bolt 7 and shift ring 3 threaded connection. The output end of the fixing bolt 7 is abutted against the side wall of the adjusting rod 13. When the worker moves the moving ring 3 to a desired position, the worker first screws the fixing bolt 7, and at this time, the fixing bolt 7 abuts against the side wall of the adjusting rod 13, and the moving ring 3 is fixed at the current position.

Specifically, referring to fig. 1 and 2, in order to improve the convenience of adjusting the welding angle of the welding pen 12, the connecting rod 4 includes a first hinge sub-rod 41 and a second hinge sub-rod 42. The first hinge sub-rod 41 is disposed outside the moving ring 3, one end of the first hinge sub-rod 41 is fixedly connected to the outside of the moving ring 3, and the other end of the first hinge sub-rod 41 is a free end. The second sub-rod 42 is disposed at one side of the support tube 11, one end of the second sub-rod 42 is detachably connected to the support tube 11 through a fixing member, and the other end of the second sub-rod 42 is a free end. The free end of the first hinge sub-rod 41 and the free end of the second hinge sub-rod 42 are hinged to each other by a hinge bolt 43. When the welding angle of the welding pen 12 needs to be adjusted, the worker swings the second hinged sub-rod 42 first, the second hinged sub-rod 42 finally drives the welding pen 12 to swing through the fixing component, and when the worker tightens the hinged bolt 43, the welding pen 12 is fixed at the current position at the moment.

Specifically, referring to fig. 1 and 2, in order to improve the detachability of the second hinge sub-rod 42 from the support pipe 11, the fixing assembly includes a locking ring 8, a locking bolt 81, and a locking nut 82. The locking ring 8 is circular, one side of the locking ring 8 is open, and the supporting tube 11 is sleeved with the locking ring 8 through the open end. Fixing lugs 83 are fixedly arranged on two sides of the open end of the locking ring 8 respectively, the locking bolt 81 is arranged on the outer side of the locking ring 8, and the output end of the locking bolt 81 sequentially penetrates through the two fixing lugs 83 and extends out of the side walls of the two fixing lugs 83. The lock nut 82 is screwed to the output end of the lock bolt 81. When the worker tightens the lock bolt 81 and the lock nut 82, the lock ring 8 grips the outside of the support pipe 11 at this time.

The working principle of the welding device of the pipe making machine is as follows:

when the stainless steel pipes with different diameters need to be welded, a worker firstly moves the moving ring 3, the moving ring 3 finally drives the welding pen 12 to slide along the length direction of the adjusting rod 13 through the connecting rod 4, so that the welding pen 12 is aligned to the position, to be welded, of the stainless steel pipe, then the fixing bolt 7 is screwed, and the moving ring 3 is fixed at the current position. The worker may then swing the second sub-hinge rod 42, and the second sub-hinge rod 42 ultimately swings the welding pen 12 to adjust the welding angle of the welding pen 12. The hinge bolt 43 is then tightened again, at which point the welding pen 12 is fixed in its current position. Finally, the worker can finally fine-tune the position of the welding pen 12 through the first hand wheel 23, the second hand wheel 53 and the third hand wheel 63, and finally the welding pen 12 is moved and adjusted to a required position.

To sum up, the welding pen 12 performs position adjustment at the forming discharge end of the pipe making machine, so as to be beneficial to improving the application range of the welding pen 12.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A welding set of tuber characterized in that: including fixing base (1), stay tube (11) and welding pen (12), the top lateral wall of fixing base (1) is provided with adjusts seat (2), adjust seat (2) and keep away from one side of fixing base (1) is provided with adjusts pole (13), it is used for driving to adjust seat (2) adjust pole (13) and remove adjustment mechanism, it is equipped with shift ring (3) to adjust pole (13) to go up the shift ring cover, shift ring (3) are fixed in through the mounting adjust on pole (13), the outside of shift ring (3) is provided with connecting rod (4), the other end of connecting rod (4) through fixed subassembly with stay tube (11) are connected, welding pen (12) set up in the one end of stay tube (11).

2. The welding device for the pipe making machine according to claim 1, wherein: the adjusting mechanism comprises a moving seat (5) which is arranged on one side of the adjusting seat (2) in a sliding mode, a sliding assembly which is used for driving the moving seat (5) to slide, a lifting seat (6) which is arranged on one side of the moving seat (5) in a sliding mode, a lifting assembly which is used for driving the lifting seat (6) to move, and a lifting assembly which is used for driving the adjusting rod (13) to lift.

3. The welding device for the pipe making machine according to claim 2, wherein: the sliding assembly comprises a sliding block (21), a first screw rod (22) and a first hand wheel (23), the adjusting seat (2) deviates from one side of the fixing seat (1) is followed the length direction of the adjusting seat (2) is provided with a sliding groove (24), the sliding block (21) is arranged in the sliding groove (24) in a sliding mode, one side of the sliding block (21) is penetrated through the sliding groove (24) and extends to the outside of the side wall of the adjusting seat (2), one side of the sliding block (21) is connected with the moving seat (5), the first screw rod (22) is arranged in the sliding groove (24) in a rotating mode, the first screw rod (22) is penetrated through the sliding block (21) and is connected with the sliding block (21) in a threaded mode, one end of the first screw rod (22) is penetrated through the sliding groove (24) and is connected with the first hand wheel (23).

4. The welding device for the pipe making machine according to claim 2, wherein: the moving component comprises a moving block (51), a second lead screw (52) and a second hand wheel (53), a moving groove (54) is arranged on one side of the moving seat (5) far away from the fixed seat (1) along the length direction of the moving seat (5), the moving block (51) is arranged in the moving groove (54) in a sliding manner, one side of the moving block (51) penetrates through the moving groove (54) and extends out of the side wall of the moving seat (5), one side of the moving block (51) is connected with the lifting seat (6), the second screw rod (52) is rotationally arranged in the moving groove (54), the second screw rod (52) penetrates through the moving block (51) and is in threaded connection with the moving block (51), one end of the second screw rod (52) penetrates through the moving groove (54) and is connected with the second hand wheel (53).

5. The welding device for the pipe making machine according to claim 2, wherein: the lifting component comprises a lifting block (61), a third screw rod (62) and a third hand wheel (63), one side of the lifting seat (6) departing from the moving seat (5) is provided with a lifting groove (64) along the vertical direction of the lifting seat (6), the lifting block (61) is arranged in the lifting groove (64) in a sliding manner, one side of the lifting block (61) penetrates through the lifting groove (64) and extends out of the side wall of the lifting seat (6), one side of the lifting seat (6) is connected with the adjusting rod (13), the third screw rod (62) is rotatably arranged in the lifting groove (64), the third screw rod (62) penetrates through the lifting block (61) and is in threaded connection with the lifting block (61), the top end of the third screw rod (62) penetrates through the lifting groove (64) and is connected with the third hand wheel (63).

6. The welding device for the pipe making machine according to claim 1, wherein: the mounting is fixing bolt (7), fixing bolt (7) set up in one side of shifting ring (3), the one end of fixing bolt (7) is run through shifting ring (3) and is extended to in shifting ring (3), fixing bolt (7) with shifting ring (3) threaded connection, the one end butt of fixing bolt (7) in adjust the lateral wall of pole (13).

7. The welding device for the pipe making machine according to claim 1, wherein: the fixing assembly comprises a locking ring (8), a locking bolt (81) and a locking nut (82), one side of the locking ring (8) is arranged in an open mode, the supporting pipe (11) is sleeved with the locking ring (8), the other end of the connecting rod (4) is connected with the outer side of the locking ring (8), fixing lugs (83) are arranged on two sides of the open end of the locking ring (8) respectively, one side of the locking bolt (81) penetrates through the fixing lugs (83) and extends to the outside of the side wall of the fixing lugs (83), and the locking nut (82) is in threaded connection with one end of the locking bolt (81).

8. The welding device for the pipe making machine according to claim 7, wherein: the connecting rod (4) comprises a first hinge sub-rod (41) and a second hinge sub-rod (42), one end of the first hinge sub-rod (41) is connected with the outer side of the moving ring (3), one end of the second hinge sub-rod (42) is connected with the outer side of the locking ring (8), and the other end of the first hinge sub-rod (41) is hinged with the other end of the second hinge sub-rod (42) through a hinge bolt (43).