Punching equipment for handle lug butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to handle lug butterfly valve punching equipment, which not only facilitates the disassembly and assembly of a butterfly valve, but also facilitates the opening of the butterfly valve, simplifies the operation process of the butterfly valve, and improves the working efficiency of the butterfly valve. Comprising a base, four supporting legs, a rotating device, a clamping mechanism, a clamping mechanism and a drilling device, mounting grooves are formed in the left front portion, the left rear portion, the right front portion and the right rear portion of the inner side of the bottom end of the base, the four supporting legs are rotatably mounted on the four mounting grooves, the rotating device is mounted at the top end of the base, and the clamping mechanism is mounted on the rotating device; the clamping mechanism is installed on the clamping mechanism, and the drilling device is installed at the left end of the base.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a handle lug butterfly valve punching device. Background Art

[0002] The handle lug butterfly valve is small in size and light in weight. It can be used as a device to cut off and regulate flow in various media pipelines. By selecting valve plates and sealing seats of different materials, and connecting the plates and shafts without pins, it can be used in more severe working conditions, such as desulfurization, vacuum, and seawater desalination systems. The lug wafer butterfly valve can realize online repair of the downstream pipelines and equipment of the valve, and the valve can realize online repair of the downstream pipelines and equipment of the valve, and the valve can be installed at the pipe end as an exhaust valve. It is suitable for use in pipelines of petroleum, chemical, food, medicine, papermaking, hydropower, ships, water supply and drainage, smelting, energy and other system pipelines, and can be used as a regulating and intercepting device on a variety of corrosive and non-corrosive gas, liquid, semi-fluid and solid powder pipes and containers.

[0003] The handle lug butterfly valve needs to be punched during processing. The existing method for punching the butterfly valve is that the staff uses a drilling machine to punch the butterfly valve, but it is inconvenient to disassemble and assemble the butterfly valve on the drilling machine, and the operation process is relatively cumbersome. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a handle lug butterfly valve punching device which is not only convenient for disassembly and assembly of the butterfly valve, but also convenient for opening the butterfly valve, thereby simplifying its operating procedures and improving its working efficiency.

[0005] The utility model discloses a handle lug butterfly valve punching device, comprising a base, four groups of supporting legs, a rotating device, a clamping mechanism, a card mounting mechanism and a drilling device, wherein the left front part, the left rear part, the right front part and the right rear part of the inner side of the bottom end of the base are all provided with mounting grooves, the four groups of supporting legs are rotatably mounted on the four groups of mounting grooves, the rotating device is mounted on the top end of the base, the clamping mechanism is mounted on the rotating device, the card mounting mechanism is mounted on the clamping mechanism, and the drilling device is mounted on the left end of the base.

[0006] The utility model discloses a handle lug butterfly valve punching device, a rotating device comprises a hand wheel, a threaded ring, a rotating shaft, a first bevel gear, a second bevel gear and a rotating disk, the left end of the rotating shaft is rotatably mounted on the upper left side of the base, the upper right end of the base is connected with a through hole, the right end of the rotating shaft passes through the through hole of the base and extends to the right side of the base, the hand wheel is mounted on the right end of the rotating shaft, a thread is arranged on the right side of the rotating shaft, the threaded ring is threadedly connected with the rotating shaft, the first bevel gear is mounted on the rotating shaft, the first bevel gear is meshed with the second bevel gear, the bottom end of the second bevel gear is rotatably mounted on the inner side of the base, the top end of the second bevel gear is mounted on the bottom end of the rotating disk, the bottom end of the rotating disk is rotatably connected with the top end of the base, and the clamping mechanism is mounted on the rotating disk.

[0007] The utility model discloses a handle lug butterfly valve punching device, a clamping mechanism comprises a rubber ring, a placement plate, a fixing block, a first spring and a fixing rod, the placement plate is mounted on the top of the turntable, the rubber ring is mounted on the top of the placement plate, the fixing rod is mounted on the middle of the top of the placement plate, a telescopic groove is arranged at the bottom of the fixing block, the top of the fixing rod is slidably connected with the telescopic groove of the fixing block, the first spring is sleeved on the outside of the fixing rod, the top of the first spring is connected with the bottom of the fixing block, the bottom of the first spring is connected with the top of the placement plate, and the clamping mechanism is mounted on the top of the fixing block.

[0008] The utility model provides a handle lug butterfly valve punching device, and the clamping mechanism includes a pull rod, a connecting frame, a clamping block, a second spring, two groups of fixed seats and two groups of clamping plates. The clamping block is installed at the lower part of the pull rod, and a sliding groove is provided in the middle part of the top end of the fixed block. The pull rod slides in the sliding groove of the fixed block, and the clamping block is clamped in cooperation with the sliding groove of the fixed block. The second spring is sleeved on the lower side of the pull rod, the top end of the second spring is connected to the bottom end of the clamping block, and the bottom end of the second spring is connected to the sliding groove of the fixed block. The connecting frame is installed on the upper side of the pull rod, and the two groups of fixed seats are respectively installed on the left and right sides of the top end of the fixed block. The two groups of clamping plates are respectively rotatably installed on the two groups of fixed seats, and the two groups of clamping plates are respectively rotatably connected to the left and right ends of the connecting frame.

[0009] The utility model discloses a handle lug butterfly valve drilling device, a drilling device comprises a moving column, a mounting frame, an electric push rod, a limit rod, two groups of limit blocks, a moving frame, a first bolt, a top plate, two groups of connecting rods, two groups of slide blocks and two groups of second bolts. The mounting frame is mounted on the lower side of the left end of the moving column, the electric push rod is mounted on the mounting frame, the output end of the electric push rod is connected to the moving frame, a slide groove is arranged at the left end of the base, the moving frame is slidably connected to the slide groove of the base, a long hole is arranged at the front end of the slide groove of the base, the first bolt passes through the long hole of the base and is threadedly connected to the moving frame, and the two The two limit blocks are respectively installed on the lower side of the right end of the moving column and the upper side of the right end of the moving frame, the limit rod is installed on the upper limit block, the limit rod is slidably connected to the lower limit block, the two groups of connecting rods are respectively rotatably installed on the front and rear sides of the bottom end of the top plate, the bottom ends of the two groups of connecting rods are respectively rotatably connected to the top ends of the two groups of sliders, the upper sides of the front and rear ends of the moving column are provided with sliding grooves, the two groups of sliders slide in the two groups of sliding grooves, the bottom ends of the two groups of sliders are provided with threaded holes, the two groups of second bolts are respectively threadedly connected to the threaded holes of the two groups of sliders, and the two groups of second bolts are tightened against the moving column.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the four groups of legs are rotated to expand outward, the four groups of legs support the base, the butterfly valve is placed on the clamping mechanism, and then the clamping mechanism drives the clamping mechanism to move upward, the clamping mechanism fixes the butterfly valve, and then the bench drill is fixed through the drilling device, and then the bench drill and the drilling device are opened, the drilling device drives the bench drill to drill the butterfly valve, and then the bench drill drives the butterfly valve to rotate to a certain angle through the rotating device, and then the bench drill drills the butterfly valve, and the above operations are repeated to enable the bench drill to continuously drill holes in the butterfly valve. By setting this equipment, it is not only convenient to disassemble and assemble the butterfly valve, but also convenient to open the butterfly valve, which simplifies its operating procedures and improves its work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 yes Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0013] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of B;

[0014] Markings in the attached figure: 1. base; 2. mounting groove; 3. support foot; 4. hand wheel; 5. threaded ring; 6. rotating shaft; 7. first bevel gear; 8. second bevel gear; 9. turntable; 10. rubber ring; 11. placement plate; 12. fixing block; 13. first spring; 14. fixing rod; 15. pull rod; 16. connecting frame; 17. block; 18. second spring; 19. fixing seat; 20. splint; 21. moving column; 22. mounting frame; 23. electric push rod; 24. limit rod; 25. limit block; 26. moving frame; 27. first bolt; 28. top plate; 29. ​​connecting rod; 30. slider; 31. slide groove; 32. second bolt. DETAILED DESCRIPTION

[0015] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0016] like Figures 1 to 3 As shown, the handle lug butterfly valve punching device of the utility model comprises a base 1, four groups of legs 3, a rotating device, a clamping mechanism, a clamping mechanism and a drilling device, the left front part, the left rear part, the right front part and the right rear part of the inner side of the bottom end of the base 1 are all provided with mounting grooves 2, the four groups of legs 3 are rotatably mounted on the four groups of mounting grooves 2, the rotating device is mounted on the top of the base 1, the clamping mechanism is mounted on the rotating device, the clamping mechanism is mounted on the clamping mechanism, and the drilling device is mounted on the left end of the base 1;

[0017] The four groups of legs 3 are rotated to expand outward, and the four groups of legs 3 support the base 1, and the butterfly valve is placed on the clamping mechanism, and then the clamping mechanism drives the clamping mechanism to move upward, and the clamping mechanism fixes the butterfly valve. Then, the bench drill is fixed through the drilling device, and then the bench drill and the drilling device are opened, and the drilling device drives the bench drill to drill the butterfly valve. After that, the bench drill drives the butterfly valve to rotate to a certain angle through the rotating device, and then the bench drill drills the butterfly valve. Repeat the above operation to make the bench drill continuously drill holes in the butterfly valve. By setting this equipment, it is not only convenient to disassemble and assemble the butterfly valve, but also convenient to open the butterfly valve, which simplifies its operating procedures and improves its work efficiency.

[0018] The utility model provides a handle lug butterfly valve punching device, a rotating device including a hand wheel 4, a threaded ring 5, a rotating shaft 6, a first bevel gear 7, a second bevel gear 8 and a turntable 9, the left end of the rotating shaft 6 is rotatably mounted on the upper left side of the base 1, the upper right end of the base 1 is connected with a through hole, the right end of the rotating shaft 6 passes through the through hole of the base 1 and extends to the right side of the base 1, the hand wheel 4 is mounted on the right end of the rotating shaft 6, a thread is arranged on the right side of the rotating shaft 6, the threaded ring 5 is threadedly connected with the rotating shaft 6, the first bevel gear 7 is mounted on the rotating shaft 6, the first bevel gear 7 is meshed with the second bevel gear 8, the bottom end of the second bevel gear 8 is rotatably mounted on the inner side of the base 1, the top end of the second bevel gear 8 is mounted on the bottom end of the turntable 9, the bottom end of the turntable 9 is rotatably connected with the top end of the base 1, and the clamping mechanism is mounted on the turntable 9;

[0019] By setting a hand wheel 4, a threaded ring 5, a rotating shaft 6, a first bevel gear 7, a second bevel gear 8 and a turntable 9, the hand wheel 4 is rotated, the hand wheel 4 drives the rotating shaft 6 to rotate, the first bevel gear 7 on the rotating shaft 6 is meshed with the second bevel gear 8, the second bevel gear 8 drives the turntable 9 to rotate, the turntable 9 drives the butterfly valve to rotate to a specified angle through a clamping mechanism and a clamping mechanism, and then the threaded ring 5 is rotated, the threaded ring 5 is threadedly connected to the rotating shaft 6, and when the left end of the threaded ring 5 contacts the right end of the base 1, the rotating shaft 6 is locked, which drives the butterfly valve to rotate and change the opening position.

[0020] The utility model provides a handle lug butterfly valve punching device, a clamping mechanism includes a rubber ring 10, a placement plate 11, a fixing block 12, a first spring 13 and a fixing rod 14, the placement plate 11 is mounted on the top of the turntable 9, the rubber ring 10 is mounted on the top of the placement plate 11, the fixing rod 14 is mounted on the middle of the top of the placement plate 11, a telescopic groove is provided at the bottom of the fixing block 12, the top of the fixing rod 14 is slidably connected with the telescopic groove of the fixing block 12, the first spring 13 is sleeved on the outside of the fixing rod 14, the top of the first spring 13 is connected with the bottom of the fixing block 12, the bottom of the first spring 13 is connected with the top of the placement plate 11, and the clamping mechanism is mounted on the top of the fixing block 12;

[0021] By arranging the rubber ring 10, the placement plate 11, the fixing block 12, the first spring 13 and the fixing rod 14, the butterfly valve is passed through the fixing rod 14 and placed on the top of the placement plate 11, and then the fixing block 12 is driven to move upward by the clamping mechanism, the fixing rod 14 slides in the fixing block 12, and the first spring 13 is elastically deformed. When the clamping mechanism is located outside the butterfly valve, the clamping mechanism cooperates with the fixing block 12 and the first spring 13 to fix the butterfly valve, thereby clamping the butterfly valve.

[0022] The handle lug butterfly valve punching device of the utility model comprises a clamping mechanism including a pull rod 15, a connecting frame 16, a clamping block 17, a second spring 18, two groups of fixed seats 19 and two groups of clamping plates 20, the clamping block 17 is installed at the lower part of the pull rod 15, a slide groove is arranged at the middle part of the top end of the fixed block 12, the pull rod 15 slides in the slide groove of the fixed block 12, the clamping block 17 is clamped in cooperation with the slide groove of the fixed block 12, the second spring 18 is sleeved on the lower side of the pull rod 15, the top end of the second spring 18 is connected to the bottom end of the clamping block 17, the bottom end of the second spring 18 is connected to the slide groove of the fixed block 12, the connecting frame 16 is installed on the upper side of the pull rod 15, the two groups of fixed seats 19 are respectively installed on the left and right sides of the top end of the fixed block 12, the two groups of clamping plates 20 are respectively rotatably installed on the two groups of fixed seats 19, and the two groups of clamping plates 20 are respectively rotatably connected to the left and right ends of the connecting frame 16;

[0023] By setting the pull rod 15, the connecting frame 16, the clamping block 17, the second spring 18, the fixing seat 19 and the clamping plate 20, by pulling the pull rod 15, the pull rod 15 drives the clamping block 17 to disengage from the sliding groove of the fixing block 12, and then rotates, the pull rod 15, the pull rod 15 drives the two groups of clamping plates 20 to unfold through the connecting frame 16, and at the same time, the pull rod 15 drives the fixing block 12 to slide upward on the fixing rod 14, and the first spring 13 is elastically deformed. When the two groups of clamping plates 20 are located outside the butterfly valve, the two groups of clamping plates 20 cooperate with the first spring 13 to clamp the butterfly valve, so as to clamp and fix the butterfly valve.

[0024] The utility model provides a handle lug butterfly valve drilling device, the drilling device comprises a moving column 21, a mounting frame 22, an electric push rod 23, a limit rod 24, two groups of limit blocks 25, a moving frame 26, a first bolt 27, a top plate 28, two groups of connecting rods 29, two groups of sliders 30 and two groups of second bolts 32, the mounting frame 22 is mounted on the lower left end of the moving column 21, the electric push rod 23 is mounted on the mounting frame 22, the output end of the electric push rod 23 is connected to the moving frame 26, a slide groove is provided at the left end of the base 1, the moving frame 26 is slidably connected to the slide groove of the base 1, the front end of the slide groove of the base 1 is connected to a long hole, the first bolt 27 passes through the long hole of the base 1 and is threadedly connected to the moving frame 26 , two groups of limit blocks 25 are respectively installed on the lower side of the right end of the moving column 21 and the upper side of the right end of the moving frame 26, the limit rod 24 is installed on the upper limit block 25, the limit rod 24 is slidably connected with the lower limit block 25, two groups of connecting rods 29 are respectively rotatably installed on the front and rear sides of the bottom end of the top plate 28, the bottom ends of the two groups of connecting rods 29 are respectively rotatably connected with the top ends of the two groups of sliders 30, the upper sides of the front and rear ends of the moving column 21 are both provided with slide grooves 31, the two groups of sliders 30 slide in the two groups of slide grooves 31, the bottom ends of the two groups of sliders 30 are both provided with threaded holes, the two groups of second bolts 32 are respectively threadedly connected with the threaded holes of the two groups of sliders 30, and the two groups of second bolts 32 are tightened against the moving column 21;

[0025] By setting the moving column 21, the mounting frame 22, the electric push rod 23, the limit rod 24, the limit block 25, the moving frame 26, the first bolt 27, the top plate 28, the connecting rod 29, the slider 30, the slide groove 31 and the second bolt 32, the overall position of the moving frame 26 is adjusted according to the punching requirements of the butterfly valve, and the moving frame 26 is slid in the slide groove of the base 1 by loosening the first bolt 27. After the moving frame 26 slides to the specified position, the first bolt 27 is rotated, and the first bolt 27 is threadedly connected with the moving frame 26 for fixing, and then the top plate 28 is pulled upward by loosening the two sets of second bolts 32, and the bench drill is placed on the top of the moving column 21 and The two sets of sliders 30 are then made to slide downward on the two sets of slide grooves 31, and the two sets of second bolts 32 are rotated. The two sets of second bolts 32 are threadedly connected with the two sets of sliders 30, and the top ends of the two sets of second bolts 32 are in contact with the moving columns 21. The two sets of second bolts 32 drive the two sets of sliders 30 to move downward, so that the top plate 28 and the moving columns 21 cooperate to clamp and fix the bench drill. After that, the electric push rod 23 is opened, and the electric push rod 23 drives the moving column 21 to move as a whole, and the limit rod 24 slides on the lower limit block 25, and the bench drill drills a hole for the butterfly valve, which plays a role in installing the bench drill and playing a role in drilling a hole for the butterfly valve.

[0026] The handle lug butterfly valve punching device of the utility model, when working, first rotates the four groups of legs 3 to make the four groups of legs 3 spread outward, the four groups of legs 3 support the base 1, the butterfly valve is placed on the top of the placement plate 11 through the fixed rod 14, and then the pull rod 15 is pulled, the pull rod 15 drives the card block 17 to break away from the sliding groove of the fixed block 12, and then rotates, the pull rod 15, the pull rod 15 drives the two groups of clamping plates 20 to spread out through the connecting frame 16, and at the same time the pull rod 15 drives the fixed block 12 to slide upward on the fixed rod 14, and the first spring 1 3, elastic deformation occurs. When the two groups of clamping plates 20 are located outside the butterfly valve, the two groups of clamping plates 20 cooperate with the first spring 13 to clamp the butterfly valve. Then, the overall position of the movable frame 26 is adjusted according to the drilling requirements of the butterfly valve. By loosening the first bolt 27, the movable frame 26 slides in the slide groove of the base 1. After the movable frame 26 slides to the specified position, the first bolt 27 is rotated, and the first bolt 27 is threadedly connected with the movable frame 26 for fixing. Then, by loosening the two groups of second bolts 32, the top plate 28 is pulled upward to put the bench drill in place. The two sets of sliders 30 are placed between the top of the moving column 21 and the top plate 28, and then the two sets of sliders 30 are slid downward on the two sets of slide grooves 31, and the two sets of second bolts 32 are rotated. The two sets of second bolts 32 are threadedly connected with the two sets of sliders 30, and the tops of the two sets of second bolts 32 are in contact with the moving column 21. The two sets of second bolts 32 drive the two sets of sliders 30 to move downward, so that the top plate 28 and the moving column 21 cooperate to clamp and fix the bench drill, and then the electric push rod 23 is turned on, and the electric push rod 23 drives the moving column 21 to move as a whole, and the limit rod 24 is in The lower limit block 25 slides on the bench drill to drill a hole in the butterfly valve, and then the hand wheel 4 is turned, the hand wheel 4 drives the rotating shaft 6 to rotate, the first bevel gear 7 on the rotating shaft 6 is meshed with the second bevel gear 8, the second bevel gear 8 drives the turntable 9 to rotate, and the turntable 9 drives the butterfly valve to rotate to a certain angle, and then the threaded ring 5 is turned, and the threaded ring 5 is threadedly connected with the rotating shaft 6. When the left end of the threaded ring 5 contacts the right end of the base 1, the rotating shaft 6 is locked, and then the bench drill drills a hole in the butterfly valve. Repeat the above operation to make the bench drill continuously drill holes in the butterfly valve.

[0027] The installation method, connection method or setting method of the handle lug butterfly valve punching device of the utility model are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the electric push rod 23 of the handle lug butterfly valve punching device of the utility model is purchased on the market, and technicians in this industry only need to install and operate it according to the accompanying instruction manual.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. Handle lug butterfly valve punching equipment, characterized in that: The utility model comprises a base (1), four groups of supporting legs (3), a rotating device, a clamping mechanism, a clamping mechanism and a drilling device. The left front part, the left rear part, the right front part and the right rear part of the inner side of the bottom end of the base (1) are all provided with mounting grooves (2). The four groups of supporting legs (3) are rotatably mounted on the four groups of mounting grooves (2). The rotating device is mounted on the top of the base (1). The clamping mechanism is mounted on the rotating device. The clamping mechanism is mounted on the clamping mechanism. The drilling device is mounted on the left end of the base (1).

2. The handle lug butterfly valve punching device according to claim 1, characterized in that: The rotating device comprises a hand wheel (4), a threaded ring (5), a rotating shaft (6), a first bevel gear (7), a second bevel gear (8) and a rotating disk (9); the left end of the rotating shaft (6) is rotatably mounted on the upper left side of the base (1); the upper right end of the base (1) is connected to a through hole; the right end of the rotating shaft (6) passes through the through hole of the base (1) and extends to the right side of the base (1); the hand wheel (4) is mounted on the right end of the rotating shaft (6); the right side of the rotating shaft (6) is provided with a thread; the threaded ring (5) is threadedly connected with the rotating shaft (6); the first bevel gear (7) is mounted on the rotating shaft (6); the first bevel gear (7) is meshed with the second bevel gear (8); the bottom end of the second bevel gear (8) is rotatably mounted on the inner side of the base (1); the top end of the second bevel gear (8) is mounted on the bottom end of the rotating disk (9); the bottom end of the rotating disk (9) is rotatably connected with the top end of the base (1); and the clamping mechanism is mounted on the rotating disk (9).

3. The handle lug butterfly valve punching device according to claim 2, characterized in that: The clamping mechanism comprises a rubber ring (10), a placement plate (11), a fixing block (12), a first spring (13) and a fixing rod (14); the placement plate (11) is mounted on the top of the rotating disk (9); the rubber ring (10) is mounted on the top of the placement plate (11); the fixing rod (14) is mounted at the middle of the top of the placement plate (11); a telescopic groove is arranged at the bottom of the fixing block (12); the top of the fixing rod (14) is slidably connected to the telescopic groove of the fixing block (12); the first spring (13) is sleeved on the outside of the fixing rod (14); the top of the first spring (13) is connected to the bottom of the fixing block (12); the bottom of the first spring (13) is connected to the top of the placement plate (11); and the clamping mechanism is mounted on the top of the fixing block (12).

4. The handle lug butterfly valve punching device according to claim 3, characterized in that: The clamping mechanism comprises a pull rod (15), a connecting frame (16), a clamping block (17), a second spring (18), two sets of fixing seats (19) and two sets of clamping plates (20). The clamping block (17) is installed at the lower part of the pull rod (15). A sliding groove is arranged at the middle part of the top of the fixing block (12). The pull rod (15) slides in the sliding groove of the fixing block (12). The clamping block (17) is clamped with the sliding groove of the fixing block (12). The second spring (18) is sleeved on the pull rod (15). On the lower side, the top end of the second spring (18) is connected to the bottom end of the clamping block (17), the bottom end of the second spring (18) is connected to the sliding groove of the fixed block (12), the connecting frame (16) is installed on the upper side of the pull rod (15), the two groups of fixed seats (19) are respectively installed on the left and right sides of the top end of the fixed block (12), the two groups of clamping plates (20) are respectively rotatably installed on the two groups of fixed seats (19), and the two groups of clamping plates (20) are respectively rotatably connected to the left and right ends of the connecting frame (16).

5. The handle lug butterfly valve punching device according to claim 4, characterized in that: The drilling device comprises a moving column (21), a mounting frame (22), an electric push rod (23), a limiting rod (24), two groups of limiting blocks (25), a moving frame (26), a first bolt (27), a top plate (28), two groups of connecting rods (29), two groups of slide blocks (30) and two groups of second bolts (32). The mounting frame (22) is mounted on the lower left end of the moving column (21), the electric push rod (23) is mounted on the mounting frame (22), the output end of the electric push rod (23) is connected to the moving frame (26), a slide groove is arranged at the left end of the base (1), the moving frame (26) is slidably connected to the slide groove of the base (1), a long hole is arranged at the front end of the slide groove of the base (1), the first bolt (27) passes through the long hole of the base (1) and is threadedly connected to the moving frame (26), the two groups of limiting blocks are connected to the moving frame (26), and the first bolt (27) passes through the long hole of the base (1) and is threadedly connected to the moving frame (26). The blocks (25) are respectively mounted on the lower side of the right end of the moving column (21) and the upper side of the right end of the moving frame (26); the limiting rod (24) is mounted on the upper limiting block (25); the limiting rod (24) is slidably connected to the lower limiting block (25); two groups of connecting rods (29) are rotatably mounted on the front side and the rear side of the bottom end of the top plate (28); the bottom ends of the two groups of connecting rods (29) are rotatably connected to the top ends of the two groups of sliding blocks (30); the upper sides of the front end and the rear end of the moving column (21) are both provided with sliding grooves (31); the two groups of sliding blocks (30) slide in the two groups of sliding grooves (31); the bottom ends of the two groups of sliding blocks (30) are both provided with threaded holes; the two groups of second bolts (32) are respectively threadedly connected to the threaded holes of the two groups of sliding blocks (30); the two groups of second bolts (32) are tightened against the moving column (21).

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