CN216802190U

CN216802190U - Pipe fitting welding set that can lock automatically

Info

Publication number: CN216802190U
Application number: CN202122473441.1U
Authority: CN
Inventors: 徐常在; 徐景泰; 李爱梅
Original assignee: Changzhou Haibao Welding & Cutting Co ltd
Current assignee: Changzhou Haibao Welding & Cutting Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-06-24
Anticipated expiration: 2031-10-14

Abstract

The utility model discloses a pipe fitting welding device capable of being automatically locked, which comprises a bottom frame, supports, a base, a locking mechanism, a turnover mechanism, a displacement mechanism and a supporting mechanism, wherein the bottom frame is arranged on a working plane in the horizontal direction, the supports are arranged at the bottom end of the bottom frame and are arranged at intervals, the base is vertically and fixedly arranged on the top surface of the bottom frame, the locking mechanism is fixedly arranged at the top end of the base, the turnover mechanism is arranged at one end, away from the bottom frame, of the base, the displacement mechanism is arranged on the top surface of the bottom frame and is fixed at one end, away from the base, of the bottom frame, the supporting mechanism is vertically arranged above the bottom frame, and the supporting mechanism is connected with the displacement mechanism in a sliding manner. Because the cross section of the pipe fitting is special in shape, a common welding device does not have a corresponding locking function, and the utility model is used for realizing the continuous welding of the wall surface of the pipe fitting, improving the production efficiency of welding and simultaneously ensuring the batch quality of a welding part.

Description

Pipe fitting welding set that can lock automatically

Technical Field

The utility model relates to the technical field of pipe welding related equipment, in particular to a pipe welding device capable of automatically locking.

Background

Welding, also known as fusion, welding, refers to a manufacturing process in which two or more metals or other thermoplastic materials are joined to one another by application of heat, elevated temperature, pressure, or other means. The energy source for welding is widely varied and includes gas flame, electric arc, laser, electron beam, friction, ultrasonic, and the like. The utility model relates to the welding of pipe fittings, wherein, because the cross section of the pipe fittings is special in shape, a common welding device has no corresponding locking function, and the utility model is produced in order to realize the continuous welding of the wall surface of the pipe fittings, improve the production efficiency of the welding and ensure the batch quality of the welding parts.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pipe welding device capable of automatically locking, so as to solve the problems in the background technology.

In order to solve the technical problems, the utility model provides the following technical scheme: pipe fitting welding set that can lock automatically, including chassis, support, base, locking mechanism, tilting mechanism, displacement mechanism and supporting mechanism, the chassis is arranged work plane in with the horizontal direction on, the bottom of chassis is located to the support and is the interval and arranges, the top surface of chassis is located to the base is perpendicular and fixed, the fixed top of locating the base of locking mechanism, tilting mechanism locates the one end that the chassis was kept away from to the base, displacement mechanism locates the top surface of chassis and is fixed in the one end that the base was kept away from to the chassis, the top of chassis is located perpendicularly to supporting mechanism, and it links to each other to slide between supporting mechanism and the displacement mechanism.

Further, displacement mechanism includes guide rail and mount, the mount sets up along the horizontal direction and with the axis symmetry of chassis, and the mount is the style of calligraphy of falling L, and the one end of mount and the lateral wall laminating of chassis are fixed to be set up, and the other end of mount passes through the mounting and links to each other with the chassis, the guide rail is located the mount inside and is connected with the last fixed surface of chassis.

Furthermore, the turnover mechanism comprises a turnover motor, a transmission gear set and a chuck, the turnover motor is arranged in the base, the turnover motor is fixedly connected with the inner side wall of the base through a motor base, the transmission gear set is arranged on one side, close to the displacement mechanism, of the base, the transmission gear set is connected with the outer side wall of the base through a fixing shell, the action end of the turnover motor penetrates through the side wall of the base and is in transmission connection with the transmission gear set, the chuck is connected to one side, away from the base, of the transmission gear set in a switching mode, and the chuck is in transmission connection with one end, away from the turnover motor, of the transmission gear set; the outer edge side wall of the chuck is provided with a square hole, and the chuck is provided with a limiting claw in an inserted manner from the square hole.

Further, locking mechanism includes linear electric motor, motor support, backup pad, reduction gear, rotating electrical machines and locking claw, linear electric motor locates the top of base, and linear electric motor passes through the top surface lateral wall fixed connection of motor support and base, the backup pad is the T style of calligraphy, and the vertical end of backup pad slides with the motor support and links to each other, and the horizontal one end of backup pad links to each other with linear electric motor's effect end, the top of backup pad is located to the reduction gear, and the reduction gear is fixed in the backup pad and keeps away from linear electric motor's one end, one side of reduction gear and link to each other with the reduction gear through the shaft coupling are located to the rotating electrical machines, the effect end of reduction gear passes the lateral wall of backup pad and fixes and be equipped with the locking claw, the locking claw all corresponds the setting with spacing claw's structure, position.

Furthermore, the action end of the linear motor is provided with a coaxial screw rod, the screw rod penetrates through the side wall of the support plate and extends upwards, and the screw rod is connected with the support plate in a threaded manner.

Furthermore, the supporting mechanism comprises a supporting seat, a jacking assembly, a rotating supporting assembly, a vertical rod and a clamping assembly, the supporting seat is arranged in the vertical direction, the lower end of the supporting seat is connected with the guide rail in a sliding manner, the jacking assembly is fixedly arranged at the top end of the supporting seat, the rotating supporting assembly is arranged above the jacking assembly and is connected with the acting end of the rotating supporting assembly, the vertical rod is symmetrically arranged at two sides of the jacking assembly along the vertical direction and along the axis, one end of the vertical rod penetrates through the supporting seat to be connected with the rotating supporting assembly, the other end of the vertical rod is connected with the supporting seat in an inserted manner, and the clamping assembly is symmetrically arranged at the upper end of the rotating supporting assembly along the axis.

Furthermore, the upright rod is connected with the supporting seat through a damping lantern ring, and the damping lantern ring is inserted into the top end of the supporting seat. The purpose of setting is in order to provide certain resistance for the motion of pole setting, guarantee the operation stationarity.

Furthermore, the bottom plate of the supporting seat extends to the inside of the fixing frame towards two sides and is provided with a sliding block, and the sliding block is connected with the guide rail in a sliding mode.

Furthermore, the rotary supporting assembly comprises a supporting frame, a rotary shaft and a friction wheel, the supporting frame is arranged in parallel and right above the supporting seat, the upper edge side wall of the supporting frame is concave and is provided with a plurality of grooves at intervals, two ends of the rotary shaft are rotatably connected with the supporting frame through the grooves, and the friction wheel is sleeved on the rotary shaft and is positioned in the supporting frame.

Further, the clamping component comprises a guide plate, a moving frame, a clamping plate, a fixed rod, a guide ring, a screw rod and a nut, wherein the guide plate is arranged along the horizontal direction and in an axial symmetry manner, the guide plate is vertically fixed on the side wall of the support frame, the bottom end of the moving frame is connected with the guide plate in a sliding manner, the clamping plate is symmetrically arranged on two sides of the support frame in the vertical direction, the clamping plate is positioned at one end, away from the moving frame, of the guide plate, the fixed rod is arranged in an inverted triangle manner along the horizontal direction, one end of the fixed rod is connected with the clamping plate, the other end of the fixed rod is connected with the movable plate through the guide ring, the screw rod penetrates through the side wall of the movable plate and is fixedly connected with the clamping plate, and the nut is sleeved at one end, away from the clamping plate, of the screw rod.

Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses a pipe fitting welding device capable of automatically locking

1. The device comprises a displacement mechanism which is arranged for changing the relative position of a supporting mechanism and a turnover mechanism so as to adapt to tubular welding pieces with different sizes and lengths.

2. The automatic welding device comprises a turnover mechanism, wherein the turnover mechanism is arranged to drive a tubular welding part to turn over so as to obtain an ideal machining position and welding speed, so that the full automation of welding is realized, and the welding production efficiency is improved.

3. Including locking mechanism, the aim at that sets up plays the locking effect to the assembly of tubulose welding spare, the supplementary upset work of accomplishing to make things convenient for the arm to drive the welding head and weld the work piece.

4. The device comprises a supporting mechanism, and aims to provide support for a tubular welding part and ensure the smooth operation of a welding process; secondly, play limiting displacement to tubular welding spare, the arm of being convenient for drives the welding head and carries out continuous welding to the work piece to this welding production efficiency that improves.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a three-dimensional schematic view of the overall structure of the auto-lockable pipe welding apparatus of the present invention;

FIG. 2 is a side view of the overall structure of the auto-lockable pipe welding apparatus of the present invention;

FIG. 3 is a schematic structural diagram of a locking mechanism of the automatic locking pipe welding device of the present invention;

FIG. 4 is a schematic structural diagram of a supporting mechanism of the automatic locking pipe welding device of the present invention;

in the figure: 1. a chassis; 2. a support; 3. a base; 4. the locking mechanism 41, the linear motor 42, the motor bracket 43, the support plate 44, the reducer 45, the rotating motor 46 and the locking claw; 5. the device comprises a turnover mechanism 51, a turnover motor 52, a transmission gear set 53, a chuck 54 and a limiting claw; 6. a displacement mechanism 61, a guide rail 62 and a fixed frame; 7. the device comprises a supporting mechanism 71, a supporting seat 72, a jacking component 73, a rotating supporting component 731, a supporting frame 732, a rotating shaft 733, a friction wheel 74, a vertical rod 75, a clamping component 751, a guide plate 752, a moving frame 753, a clamping plate 754, a fixing rod 755, a guide ring 756, a screw rod 757 and a nut; 8. a slide block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: pipe fitting welding set that can lock automatically, including chassis 1, support 2, base 3, locking mechanism 4, tilting mechanism 5, displacement mechanism 6 and supporting mechanism 7, work plane is arranged in with the horizontal direction to chassis 1, support 2 locates the bottom of chassis 1 and is the interval and arranges, the top surface of chassis 1 is located perpendicularly and fixedly to base 3, the fixed top of locating base 3 of locking mechanism 4, tilting mechanism 5 locates the one end that base 3 kept away from chassis 1, displacement mechanism 6 locates the top surface of chassis 1 and is fixed in chassis 1 and keeps away from the one end of base 3, the top of chassis 1 is located perpendicularly to supporting mechanism 7, and it links to each other to slide between supporting mechanism 7 and the displacement mechanism 6.

The displacement mechanism 6 comprises a guide rail 61 and a fixing frame 62, the fixing frame 62 is symmetrically arranged along the horizontal direction and by the central axis of the bottom frame 1, the fixing frame 62 is inverted L-shaped, one end of the fixing frame 62 is attached to and fixedly arranged on the side wall of the bottom frame 1, the other end of the fixing frame 62 is connected with the bottom frame 1 through a fixing piece, and the guide rail 61 is arranged inside the fixing frame 62 and fixedly connected with the upper surface of the bottom frame 1.

The turnover mechanism 5 comprises a turnover motor 51, a transmission gear set 52, a chuck 53 and a limiting claw 54, wherein the turnover motor 51 is arranged inside the base 3, the turnover motor 51 is fixedly connected with the inner side wall of the base 3 through a motor base, the transmission gear set 52 is arranged on one side of the base 3 close to the displacement mechanism 6, the transmission gear set 52 is connected with the outer side wall of the base 3 through a fixing shell, the action end of the turnover motor 51 penetrates through the side wall of the base 3 to be in transmission connection with the transmission gear set 52, the chuck 53 is in transmission connection with one side of the transmission gear set 52 departing from the base 3, and the chuck 53 is in transmission connection with one end of the transmission gear set 52 departing from the turnover motor 51; the outer edge side wall of the chuck 53 is provided with a square hole, and the chuck 53 is provided with a limit claw 54 through the square hole in an inserted manner.

The locking mechanism 4 comprises a linear motor 41, a motor bracket 42, a supporting plate 43, a speed reducer 44, a rotating motor 45 and a locking claw 46, the linear motor 41 is arranged above the base 3, the linear motor 41 is fixedly connected with the side wall of the top surface of the base 3 through a motor bracket 42, the supporting plate 43 is T-shaped, the longitudinal end of the supporting plate 43 is connected with the motor bracket 42 in a sliding way, the transverse end of the supporting plate 43 is connected with the action end of the linear motor 41, the speed reducer 44 is arranged at the top end of the supporting plate 43, the speed reducer 44 is fixed at one end of the supporting plate 43 far away from the linear motor 41, the rotating motor 45 is provided at one side of the speed reducer 44 and connected to the speed reducer 44 through a coupling, the action end of the speed reducer 44 penetrates through the side wall of the supporting plate 43 and is fixedly provided with a locking claw 46, and the locking claw 46 and the limiting claw 54 are correspondingly arranged in structure and position.

The action end of the linear motor 41 is provided with a coaxial threaded rod, the threaded rod penetrates through the side wall of the supporting plate 43 and extends upwards, and the threaded rod is connected with the supporting plate 43 in a threaded mode.

The supporting mechanism 7 comprises a supporting seat 71, a jacking assembly 72, a rotating supporting assembly 73, an upright rod 74 and a clamping assembly 75, the supporting seat 71 is arranged in the vertical direction, the lower end of the supporting seat 71 is connected with the guide rail 61 in a sliding manner, the jacking assembly 72 is fixedly arranged at the top end of the supporting seat 71, the rotating supporting assembly 73 is arranged above the jacking assembly 72 and connected with the acting end of the jacking assembly, the upright rods 74 are symmetrically arranged at two sides of the jacking assembly 72 along the vertical direction and with an axis, one end of each upright rod 74 penetrates through the supporting seat 71 to be connected with the rotating supporting assembly 73, the other end of each upright rod 74 is inserted into the supporting seat 71, and the clamping assembly 75 is symmetrically arranged at the upper end of the rotating supporting assembly 73 with the axis.

The upright rod 74 is connected with the supporting seat 71 through a damping lantern ring, and the damping lantern ring is inserted at the top end of the supporting seat 71.

The bottom plate of the supporting seat 71 extends to the inside of the fixed frame 62 towards two sides and is provided with a sliding block 8, and the sliding block 8 is connected with the guide rail 61 in a sliding manner.

The rotating support component 73 includes a support frame 731, a rotating shaft 732 and a friction wheel 733, the support frame 731 is parallel and disposed right above the supporting seat 71, the upper edge of the support frame 731 is concave and is provided with a plurality of grooves at intervals, two ends of the rotating shaft 732 are rotatably connected with the support frame 731 through the grooves, and the friction wheel 733 is sleeved on the rotating shaft 732 and is located inside the support frame 731.

The clamping assembly 75 comprises a guide plate 751, a moving frame 752, a clamping plate 753, fixing rods 754, a guide ring 755, screws 756 and nuts 757, wherein the guide plate 751 is arranged in a horizontal direction and in axial symmetry, the guide plate 751 is vertically fixed on the side wall of the supporting frame 731, the bottom end of the moving frame 752 is in sliding connection with the guide plate 751, the clamping plate 753 is symmetrically arranged on two sides of the supporting frame 731 in a vertical direction, the clamping plate 753 is located at one end, away from the moving frame 752, of the guide plate 751, the fixing rods 754 are arranged in an inverted triangular shape in the horizontal direction, one end of the fixing rods 754 is connected with the clamping plate 753, the other end of the fixing rods 754 is connected with the moving plate through the guide ring 755, the screws 756 penetrate through the side wall of the moving plate and are fixedly connected with the clamping plate 753, and the nuts 757 are sleeved at one end, away from the clamping plate 753, of the screws 756.

The working principle of the utility model is as follows: 1. connecting a power supply, inserting one end of the tubular welding part into the chuck 53, pushing the supporting seat 71 towards the other end of the welding part according to the size of the tubular welding part, namely changing the relative position of the sliding block 8 and the guide rail 61, enabling the other end of the welding part to reach the upper part of the rotating support component 73, starting the jacking component 72, driving the rotating support component 73 and the supporting seat 71 to generate relative displacement, and enabling the welding part to form surface contact with the friction wheel 733 so as to play a supporting role;

2. starting the linear motor 41, driving the threaded rod to move by the action end of the linear motor 41, generating relative displacement by the supporting plate 43, driving the rotating motor 45 and the speed reducer 44 to move downwards by the supporting plate 43, starting the rotating motor 45, driving the speed reducer 44 through the coupler, and driving the locking claw 46 to rotate by the speed reducer 44;

3. the locking claw 46 is clamped with the limiting claw 54 and acts on the chuck 53, so that a locking effect is achieved on a welding part, the linear motor 41 is controlled to rotate reversely, the locking claw 46 is driven to move upwards through the supporting plate 43, and the blockage caused by the turnover of the welding part is avoided;

3. the nut 757 is rotated, the nut 757 and the screw 756 move relatively, so that the movable frame 752 and the guide plate 751 generate relative displacement, the fixed rod 754 and the guide ring 755 generate relative displacement, the fixed rod 754 drives the clamping plates 753 to move oppositely until the clamping plates 753 at two sides and the welding part form surface contact, and therefore the limiting effect is achieved on the welding part;

4. the turning motor 51 is started, the chuck 53 is driven to move through the transmission gear set 52, so that a welding part is driven to turn over, and the mechanical arm is convenient to drive the welding head to weld the welding part.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Pipe fitting welding set that can lock automatically, its characterized in that: the pipe welding device comprises an underframe (1), a support (2), a base (3), a locking mechanism (4), a turnover mechanism (5), a displacement mechanism (6) and a supporting mechanism (7), the bottom frame (1) is arranged on a working plane in the horizontal direction, the supports (2) are arranged at the bottom end of the bottom frame (1) at intervals, the base (3) is vertically and fixedly arranged on the top surface of the underframe (1), the locking mechanism (4) is fixedly arranged at the top end of the base (3), the turnover mechanism (5) is arranged at one end of the base (3) far away from the bottom frame (1), the displacement mechanism (6) is arranged on the top surface of the bottom frame (1) and fixed at one end of the bottom frame (1) far away from the base (3), the supporting mechanism (7) is vertically arranged above the bottom frame (1), and the supporting mechanism (7) is connected with the displacement mechanism (6) in a sliding manner.

2. The automatically lockable pipe welding apparatus according to claim 1, wherein: displacement mechanism (6) are including guide rail (61) and mount (62), mount (62) are along the horizontal direction and set up with the axis symmetry of chassis (1), and mount (62) are the style of calligraphy of falling L, and the one end of mount (62) is laminated with the lateral wall of chassis (1) and is fixed the setting, and the other end of mount (62) passes through the mounting and links to each other with chassis (1), inside and the last fixed surface who is connected with chassis (1) of mount (62) is located in guide rail (61).

3. The automatically lockable pipe welding apparatus according to claim 1, wherein: the turnover mechanism (5) comprises a turnover motor (51), a transmission gear set (52), a chuck (53) and a limiting claw (54), wherein the turnover motor (51) is arranged inside the base (3), the turnover motor (51) is fixedly connected with the inner side wall of the base (3) through a motor base, the transmission gear set (52) is arranged on one side, close to the displacement mechanism (6), of the base (3), the transmission gear set (52) is connected with the outer side wall of the base (3) through a fixing shell, the action end of the turnover motor (51) penetrates through the side wall of the base (3) to be in transmission connection with the transmission gear set (52), the chuck (53) is in transmission connection with one side, deviating from the base (3), of the transmission gear set (52), and the chuck (53) is in transmission connection with one end, deviating from the turnover motor (51), of the transmission gear set (52); the outer edge side wall of the chuck (53) is provided with a square hole, and the chuck (53) is inserted with a limit claw (54) from the square hole.

4. The automatically lockable pipe welding apparatus according to claim 3, wherein: the locking mechanism (4) comprises a linear motor (41), a motor support (42), a support plate (43), a speed reducer (44), a rotating motor (45) and locking claws (46), the linear motor (41) is arranged above the base (3), the linear motor (41) is fixedly connected with the side wall of the top surface of the base (3) through the motor support (42), the support plate (43) is T-shaped, the longitudinal end of the support plate (43) is connected with the motor support (42) in a sliding manner, the transverse end of the support plate (43) is connected with the action end of the linear motor (41), the speed reducer (44) is arranged at the top end of the support plate (43), the speed reducer (44) is fixed at one end, far away from the linear motor (41), of the supporting plate (43), the rotating motor (45) is arranged at one side of the speed reducer (44) and is connected with the speed reducer (44) through a coupler, the action end of the speed reducer (44) penetrates through the side wall of the support plate (43) and is fixedly provided with the locking claws (46), the locking claw (46) and the limiting claw (54) are correspondingly arranged in structure and position.

5. The auto-lockable pipe welding device according to claim 4, characterized in that: the action end of the linear motor (41) is provided with a coaxial threaded rod, the threaded rod penetrates through the side wall of the support plate (43) and extends upwards, and the threaded rod is connected with the support plate (43) in a threaded mode.

6. The automatically lockable pipe welding apparatus according to claim 2, wherein: the supporting mechanism (7) comprises a supporting seat (71), a jacking assembly (72), a rotating supporting assembly (73), a vertical rod (74) and a clamping assembly (75), the supporting seat (71) is arranged in the vertical direction, the lower end of the supporting seat (71) is in sliding connection with the guide rail (61), the jacking assembly (72) is fixedly arranged at the top end of the supporting seat (71), the rotating supporting assembly (73) is arranged above the jacking assembly (72) and connected with the acting end of the rotating supporting assembly, the vertical rod (74) is symmetrically arranged on two sides of the jacking assembly (72) along the vertical direction and with an axis, one end of the vertical rod (74) penetrates through the supporting seat (71) to be connected with the rotating supporting assembly (73), the other end of the vertical rod (74) is inserted into the supporting seat (71), and the clamping assembly (75) is symmetrically arranged at the upper end of the rotating supporting assembly (73) with the axis.

7. The auto-lockable pipe welding device according to claim 6, characterized in that: the upright rod (74) is connected with the supporting seat (71) through a damping lantern ring, and the damping lantern ring is inserted at the top end of the supporting seat (71).

8. The automatically lockable pipe welding apparatus according to claim 6, wherein: the bottom plate of the supporting seat (71) extends to the inside of the fixed frame (62) towards two sides and is provided with a sliding block (8), and the sliding block (8) is connected with the guide rail (61) in a sliding mode.

9. The automatically lockable pipe welding apparatus according to claim 6, wherein: the rotary supporting component (73) comprises a supporting frame (731), a rotating shaft (732) and a friction wheel (733), the supporting frame (731) is parallel to and arranged right above the supporting seat (71), the upper edge of the supporting frame (731) is concave and provided with a plurality of grooves at intervals, two ends of the rotating shaft (732) are rotatably connected with the supporting frame (731) through the grooves, and the friction wheel (733) is sleeved on the rotating shaft (732) and located inside the supporting frame (731).

10. The auto-lockable pipe welding apparatus of claim 9, wherein: the clamping assembly (75) comprises a guide plate (751), a moving frame (752), a clamping plate (753), a fixing rod (754), a guide ring (755), a screw rod (756) and a nut (757), wherein the guide plate (751) is arranged in the horizontal direction and in axial symmetry, the guide plate (751) is vertically fixed on the side wall of the support frame (731), the bottom end of the moving frame (752) is in sliding connection with the guide plate (751), the clamping plate (753) is symmetrically arranged on two sides of the support frame (731) in the vertical direction, the clamping plate (753) is located at one end, far away from the moving frame (752), of the guide plate (751), the fixing rod (754) is arranged in an inverted triangle shape in the horizontal direction, one end of the fixing rod (754) is connected with the clamping plate (753), the other end of the fixing rod (754) is connected with the moving plate through the guide ring (755), and the screw rod (756) penetrates through the side wall of the moving plate and is fixedly connected with the clamping plate (753), the nut (757) is sleeved at one end, far away from the clamping plate (753), of the screw rod (756).