An external protective device for filter press

Abstract

The invention discloses an external protective device for a filter press, and relates to the technical field of filter presses. In order to solve the problem that the filter press has no corresponding protective device, the water produced by the filter pressing directly drips onto the ground without being processed in the middle, and the water dripping onto the ground will be splashed, and the water produced by the filter pressing cannot be well collected, which increases the difficulty of subsequent operations. The filter press body frame is provided with two, and the side end walls of the two filter press body frames are provided with a card and a groove, and the two sides of the filter press body frame are provided with a cross beam plate, one side of the filter press body frame is provided with a liquid inlet, and the other side of the filter press body frame is provided with a thrust plate, one side of the thrust plate is provided with a filter frame, one side of the filter frame is provided with a push plate, and one side of the push plate is provided with a hydraulic telescopic cylinder, a controller is provided above the cross beam plate, a protective frame is provided below the cross beam plate, and a drain pipe is provided below the protective frame.

Description

Technical Field

[0001] The invention relates to the technical field of filter presses, in particular to an external protective device for a filter press. Background Art

[0002] At present, in the production process, the filter press is a very important machine with the function of solid-liquid separation. The filter press uses a special filter medium to apply a certain pressure to the object, so that the liquid can be dialyzed out. It is a commonly used solid-liquid separation equipment. It was used in chemical production in the early 18th century and is still widely used in chemical, pharmaceutical, metallurgical, dye, food, brewing, ceramics and environmental protection industries.

[0003] The existing filter presses do not have corresponding protective devices. The water produced by the filtration drips directly onto the ground without being treated in the middle. The water dripping onto the ground will splash, and the water produced by the filtration cannot be collected well, which increases the difficulty of subsequent use and cannot meet the use requirements. Therefore, the market is in urgent need of an external protective device for the filter press to solve these problems. Summary of the invention

[0004] The object of the present invention is to provide an external protective device for a filter press to solve the problem mentioned in the above background technology that the filter press has no corresponding protective device, the water produced by the filtration directly drips onto the ground without being treated in the middle, the water dripping onto the ground will splash, and the water produced by the filtration cannot be well collected, increasing the difficulty of subsequent collection.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an external protective device for a filter press, comprising a filter press body frame, two filter press body frames are provided, and the side end walls of the two filter press body frames are provided with a card and a groove, both sides of the filter press body frame are provided with a cross beam plate, and one end of the cross beam plate extends to the inside of the card and the groove, one side of the filter press body frame is provided with a liquid inlet, and the liquid inlet and the filter press body frame are provided as an integral structure, and the other side of the filter press body frame is provided with a thrust plate, and the thrust plate It is connected to the filter press body frame by screws, a filter frame is arranged on one side of the thrust plate, and several filter frames are arranged, a push plate is arranged on one side of the filter frame, a hydraulic telescopic cylinder is arranged on one side of the push plate, and the hydraulic telescopic cylinder is connected to the push plate and the filter press body frame by screws, a controller is arranged above the cross beam plate, and the controller is connected to the cross beam plate by screws, a protective frame is arranged below the cross beam plate, and two protective frames are arranged, a drain pipe is arranged below the protective frame, and one end of the drain pipe extends to the inside of the protective frame.

[0006] Preferably, a connecting bolt is provided on one side of the cross beam plate, and one end of the connecting bolt passes through the cross beam plate and extends to the interior of the filter press body frame, the connecting bolt is threadedly connected to the filter press body frame, a mounting block is provided on one side of the cross beam plate, and the mounting block is connected to the cross beam plate by screws, an electric telescopic rod is provided below the mounting block, and the electric telescopic rod is connected to the protective frame and the mounting block by screws.

[0007] Preferably, a sealing gasket is provided between the protective frame and the drain pipe, and the sealing gasket fits the protective frame and the drain pipe. A vibrator is provided outside the protective frame, two vibrators are provided, and the vibrator and the protective frame are connected by screws.

[0008] Preferably, a first guide groove is provided on both ends of the protective frame, and the first guide groove and the protective frame are stamped into an integral structure, guide rods are provided on both sides of the protective frame, and the guide rods are connected to the filter press body frame by screws, one end of the guide rod extends to the inside of the first guide groove, and the guide rod is slidably connected to the protective frame, a limit block is provided at one end of the guide rod, and the limit block is connected to the guide rod by screws.

[0009] Preferably, a water outlet is provided at the lower end of the filter frame, and the water outlet and the filter frame are arranged as an integral structure, a filter plate is provided inside the filter frame, and the filter plate and the filter frame are connected by screws, connecting ears are provided on both sides of the filter plate, and the connecting ears and the filter frame are connected by screws, the connecting ears are fitted with the cross beam plate, and the connecting ears are slidably connected to the cross beam plate, a roller is provided inside the connecting ear, and the roller is rotatably connected to the connecting ear, and the roller is fitted with the cross beam plate.

[0010] Preferably, a first slide groove is provided on the inner walls of the two cross beam plates, and the first slide groove and the cross beam plate are stamped into an integral structure, a first slider is provided on both sides of the filter frame, and the first slider is connected to the filter frame by screws, one end of the first slider extends to the interior of the first slide groove, and the first slider is slidably connected to the filter frame.

[0011] Preferably, adjustment seats are provided on both sides of the hydraulic telescopic cylinder, and the adjustment seats are connected to the filter press body frame by screws, an adjustment rod is provided on one side of the adjustment seat, and the adjustment rod is connected to the push plate by screws, a telescopic cavity is provided inside the adjustment seat, and the telescopic cavity and the adjustment seat are stamped into an integral structure, and one end of the adjustment rod extends to the inside of the telescopic cavity.

[0012] Preferably, a guide ring is provided between the adjusting rod and the adjusting seat, and the guide ring is provided inside the telescopic cavity, the guide ring is connected to the adjusting seat by screws, a second guide groove is provided inside the guide ring, three second guide grooves are provided, and the three second guide grooves are provided in sequence on the guide ring, a guide rail is provided outside the adjusting rod, three guide rails are provided, and the guide rail is connected to the adjusting rod by screws, one end of the guide rail extends to the inside of the second guide groove, and the guide rail is slidably connected to the guide ring.

[0013] Preferably, a second slide groove is provided on the inner wall of the two cross beam plates, and the second slide groove and the cross beam plate are stamped into an integral structure, a second slider is provided on both sides of the push plate, and the second slider is connected to the push plate by bolts, one end of the second slider extends to the interior of the second slide groove, and the second slider is slidably connected to the cross beam plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The device of the invention is provided with a protective frame, a drain pipe, a vibrator and an electric telescopic rod. The protective frame and the filter press body frame can slide through the guide rod. The protective frame can be driven to move under the action of the electric telescopic rod, thereby realizing the connection between the two protective frames and the drain pipe. The squeezed water can be discharged with the help of the drain pipe to prevent the water from falling directly on the ground and splashing. The vibrator can drive the protective frame to vibrate, which can prevent the mud and slag from remaining on the protective frame. The problem of splashing caused by the water produced by the filter press directly dripping on the ground is solved.

[0016] 2. The device of the invention is provided with the first slider, the first chute, the second chute and the second slider. The first slider and the first chute can guide and limit the moving filter frame, and the second chute and the second slider can guide and limit the moving push plate, ensuring that the filter frame and the push plate are in a vertical state with the crossbeam during the movement, so that the sewage is squeezed evenly, which indirectly improves the filter pressing effect. It solves the problem that the filter frame and the push plate are skewed due to the uneven squeezing force during the squeezing process, resulting in poor filter pressing effect.

[0017] 3. The inventive device is provided with an adjustment seat, an adjustment rod and a guide ring. The adjustment rod will slide with the adjustment seat accordingly as the hydraulic telescopic cylinder is extended and retracted. The guide ring guides and limits the sliding adjustment rod, thereby improving the sliding stability of the adjustment rod. The adjustment rod indirectly limits the two sides of the hydraulic telescopic cylinder, ensuring that the hydraulic telescopic cylinder is in a straight state, avoiding the hydraulic telescopic cylinder from bending due to uneven force and causing cylinder explosion, and protecting the hydraulic telescopic cylinder. The invention solves the problem that the hydraulic telescopic cylinder has no corresponding limiting effect during operation, and the hydraulic telescopic cylinder is prone to bending due to uneven force, resulting in cylinder explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a main structural diagram of the present invention;

[0019] Figure 2 It is a side structural diagram of the present invention;

[0020] Figure 3 A diagram showing the connection relationship between the protection frame and the cross beam plate of the present invention;

[0021] Figure 4 A diagram showing the connection between the drainage pipe and the protection frame of the present invention;

[0022] Figure 5 It is a connection relationship diagram of the hydraulic telescopic cylinder of the present invention, the filter press body frame and the push plate;

[0023] Figure 6 This is a diagram showing the connection relationship between the guide ring, the adjustment seat and the adjustment rod of the present invention.

[0024] In the figure: 1. filter press body frame; 2. liquid inlet; 3. thrust plate; 4. filter frame; 5. connecting ear; 6. crossbeam plate; 7. protective frame; 8. guide rod; 9. drain pipe; 10. vibrator; 11. mounting block; 12. push plate; 13. controller; 14. connecting bolt; 15. hydraulic telescopic cylinder; 16. first guide groove; 17. electric telescopic rod; 18. card and groove; 19. limit block; 20. roller; 21. filter plate; 22. first slider; 23. first slide groove; 24. sealing gasket; 25. water outlet; 26. second slide groove; 27. second slider; 28. adjustment seat; 29. ​​telescopic cavity; 30. adjustment rod; 31. guide ring; 32. second guide groove; 33. guide rail. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] See also Figure 1-6, an embodiment provided by the present invention: an external protective device for a filter press, comprising a filter press body frame 1, two filter press body frames 1 are provided, and the side end walls of the two filter press body frames 1 are provided with a card and a groove 18, the card and the groove 18 are convenient for the cross beam plate 6 to be installed and fixed with the filter press body frame 1, cross beam plates 6 are provided on both sides of the filter press body frame 1, and one end of the cross beam plate 6 extends to the inside of the card and the groove 18, a liquid inlet 2 is provided on one side of the filter press body frame 1, and the liquid inlet 2 and the filter press body frame 1 are set as an integral structure, a thrust plate 3 is provided on the other side of the filter press body frame 1, and the thrust plate 3 is connected to the filter press body frame 1 by screws, a filter frame 4 is provided on one side of the thrust plate 3, and the filter frame 4 is provided with a plurality of, A push plate 12 is provided on one side of the filter frame 4, and a hydraulic telescopic cylinder 15 is provided on one side of the push plate 12, and the hydraulic telescopic cylinder 15 is connected to the push plate 12 and the filter press body frame 1 by screws. The hydraulic telescopic cylinder 15 drives the push plate 12 to push, and the filter frame 4 is squeezed by the extrusion force between the push plate 12 and the thrust plate 3, so that the water can be squeezed out. A controller 13 is provided above the cross beam 6, and the controller 13 is connected to the cross beam 6 by screws. A protective frame 7 is provided below the cross beam 6, and two protective frames 7 are provided. The protective frames 7 prevent the squeezed water from splashing. A drain pipe 9 is provided below the protective frame 7, and one end of the drain pipe 9 extends to the inside of the protective frame 7, and the drain pipe 9 can drain the squeezed water.

[0027] Further, a connecting bolt 14 is provided on one side of the cross beam plate 6, and one end of the connecting bolt 14 passes through the cross beam plate 6 and extends to the inside of the filter press body frame 1, and the connecting bolt 14 is threadedly connected to the filter press body frame 1, and a mounting block 11 is provided on one side of the cross beam plate 6, and the mounting block 11 is connected to the cross beam plate 6 by screws, and an electric telescopic rod 17 is provided below the mounting block 11, and the electric telescopic rod 17 is connected to the protective frame 7 and the mounting block 11 by screws. The cross beam plate 6 can be fixed to the filter press body frame 1 by the connecting bolt 14, and the electric telescopic rod 17 drives the protective frame 7 to move horizontally, so that the protective frame 7 can be separated, which is convenient for unloading the dirt sheet material.

[0028] Furthermore, a sealing gasket 24 is provided between the protection frame 7 and the drain pipe 9, and the sealing gasket 24 fits the protection frame 7 and the drain pipe 9. A vibrator 10 is provided outside the protection frame 7. Two vibrators 10 are provided, and the vibrator 10 is connected to the protection frame 7 by screws. The vibrator 10 drives the protection frame 7 to vibrate, and the material can be shaken when feeding, which improves the feeding effect, and the sealing gasket 24 improves the sealing between the protection frame 7 and the drain pipe 9, effectively avoiding water leakage.

[0029] Further, first guide grooves 16 are provided on both ends of the protection frame 7, and the first guide grooves 16 and the protection frame 7 are stamped into an integral structure, guide rods 8 are provided on both sides of the protection frame 7, and the guide rods 8 are connected to the filter press body frame 1 by screws, one end of the guide rod 8 extends to the inside of the first guide groove 16, and the guide rod 8 is slidably connected to the protection frame 7, and a limit block 19 is provided at one end of the guide rod 8, and the limit block 19 is connected to the guide rod 8 by screws. The moving protection frame 7 can be guided and limited by the first guide groove 16 and the guide rod 8, thereby improving the stability of the movement of the protection frame 7, and the limit block 19 can prevent the protection frame 7 from moving away from the guide rod 8.

[0030] Further, a water outlet 25 is provided at the lower end of the filter frame 4, and the water outlet 25 and the filter frame 4 are set as an integral structure, a filter plate 21 is provided inside the filter frame 4, and the filter plate 21 is connected to the filter frame 4 by screws, connecting ears 5 are provided on both sides of the filter plate 21, and the connecting ears 5 are connected to the filter frame 4 by screws, the connecting ears 5 are fitted with the cross beam 6, and the connecting ears 5 are slidably connected to the cross beam 6, and the connecting ears 5 are provided inside the connecting ears 5, and the rollers 20 are rotatably connected to the connecting ears 5, and the rollers 20 are fitted with the cross beam 6. The filter plate 21 can be installed on the cross beam 6 through the connecting ears 5 to provide support for the cross beam 6, and the rollers 20 facilitate the sliding of the filter plate 21 along the cross beam 6, thereby conveniently moving the filter plate 21, thereby removing the dirt sheet material.

[0031] Further, the inner walls of the two cross beams 6 are both provided with first chutes 23, and the first chutes 23 and the cross beams 6 are stamped into an integral structure, and first sliders 22 are both provided on both sides of the filter frame 4, and the first sliders 22 are connected to the filter frame 4 by screws, one end of the first slider 22 extends to the inside of the first chutes 23, and the first slider 22 is slidably connected to the filter frame 4. The first slider 22 and the first chutes 23 can guide and limit the moving filter frame 4, improve the stability of the movement of the filter frame 4, ensure the balance of the moving filter frame 4, and prevent uneven squeezing force of the mud and dirt inside the filter frame 4, thereby improving the filter pressing effect of the filter frame 4.

[0032] Further, both sides of the hydraulic telescopic cylinder 15 are provided with adjustment seats 28, and the adjustment seats 28 are connected to the filter press body frame 1 by screws, one side of the adjustment seat 28 is provided with an adjustment rod 30, and the adjustment rod 30 is connected to the push plate 12 by screws, and a telescopic cavity 29 is provided inside the adjustment seat 28, and the telescopic cavity 29 and the adjustment seat 28 are stamped into an integral structure, and one end of the adjustment rod 30 extends to the inside of the telescopic cavity 29. The adjustment rod 30 slides inside the telescopic cavity 29 as the hydraulic telescopic cylinder 15 is extended and retracted, thereby limiting the working hydraulic telescopic cylinder 15, so that the hydraulic telescopic cylinder 15 is in a straight state, indirectly protecting the hydraulic telescopic cylinder 15, and preventing the hydraulic telescopic cylinder 15 from bursting due to uneven force.

[0033] Furthermore, a guide ring 31 is provided between the adjustment rod 30 and the adjustment seat 28, and the guide ring 31 is provided inside the telescopic cavity 29, the guide ring 31 is connected to the adjustment seat 28 by screws, a second guide groove 32 is provided inside the guide ring 31, three second guide grooves 32 are provided, and the three second guide grooves 32 are sequentially provided on the guide ring 31, a guide rail 33 is provided outside the adjustment rod 30, three guide rails 33 are provided, and the guide rail 33 is connected to the adjustment rod 30 by screws, one end of the guide rail 33 extends to the inside of the second guide groove 32, and the guide rail 33 is slidably connected to the guide ring 31. The guide ring 31 and the guide rail 33 can play a guiding and limiting effect on the sliding adjustment rod 30, thereby improving the sliding stability of the adjustment rod 30.

[0034] Further, the inner walls of the two cross beams 6 are both provided with second slide grooves 26, and the second slide grooves 26 and the cross beams 6 are stamped into an integral structure, and the two sides of the push plate 12 are both provided with second sliders 27, and the second sliders 27 are connected to the push plate 12 by bolts, one end of the second slider 27 extends to the inside of the second slide grooves 26, and the second slider 27 is slidably connected to the cross beam 6. The second slider 27 and the second slide groove 26 can play a guiding and limiting role for the moving push plate 12, so that the push plate 12 is in a vertical state with the cross beam 6 when moving, and the force is uniform when the push plate 12 contacts the filter frame 4, thereby improving the extrusion effect.

[0035] Working principle: When in use, the electric telescopic rod 17 is driven, and the protective frame 7 and the filter press body frame 1 can slide through the guide rod 8. Under the action of the electric telescopic rod 17, the protective frame 7 can be driven to move, and the two protective frames 7 and the drain pipe 9 are spliced ​​into an integrated structure. The sewage to be treated is injected into the filter frame 4 through the liquid inlet 2, and the hydraulic telescopic cylinder 15 is driven. The filter frame 4 and the push plate 12 are both slidably connected with the cross beam 6. Under the action of the hydraulic telescopic cylinder 15, the push plate 12 is driven to interact horizontally along the cross beam 6. When the push plate 12 contacts the filter frame 4, the filter frame 4 will be squeezed. Thereby, the water inside the filter frame 4 can be squeezed, so that the sewage can be squeezed out from the water outlet 25 and dripped into the inside of the protective frame 7 and discharged from the drain pipe 9, and no water will drip directly onto the ground to cause splashing. After the water is squeezed out completely, the hydraulic telescopic cylinder 15 is driven in reverse to reset the push plate 12, and the electric telescopic rod 17 is driven to separate the protective frame 7. When the filter frame 4 is separated, the mud and residue sheets accumulated on the filter plate 21 are removed, and the vibrator 10 on the protective frame 7 is turned on. The vibrator 10 drives the protective frame 7 to shake, thereby preventing the fallen mud and residue sheets from adhering to the protective frame 7.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An external protective device for a filter press, comprising a filter press body frame (1), characterized in that: The filter press body frame (1) is provided with two, and the side end walls of the two filter press body frames (1) are both provided with a card and a groove (18), and the two sides of the filter press body frame (1) are both provided with a cross beam plate (6), and one end of the cross beam plate (6) extends to the inside of the card and the groove (18), and the filter press body frame (1) is provided with a liquid inlet (2) on one side, and the liquid inlet (2) and the filter press body frame (1) are provided as an integral structure, and the other side of the filter press body frame (1) is provided with a thrust plate (3), and the thrust plate (3) is connected to the filter press. The body frame (1) is connected by screws, a filter frame (4) is arranged on one side of the thrust plate (3), a plurality of filter frames (4) are arranged, a push plate (12) is arranged on one side of the filter frame (4), a hydraulic telescopic cylinder (15) is arranged on one side of the push plate (12), and the hydraulic telescopic cylinder (15) is connected to the push plate (12) and the body frame (1) of the filter press by screws, a controller (13) is arranged above the cross beam (6), and the controller (13) is connected to the cross beam (6) by screws, and the cross beam (6) is arranged below A protection frame (7) is provided, and two protection frames (7) are provided. A drainage pipe (9) is provided below the protection frame (7), and one end of the drainage pipe (9) extends to the inside of the protection frame (7). A connecting bolt (14) is provided on one side of the cross beam plate (6), and one end of the connecting bolt (14) passes through the cross beam plate (6) and extends to the inside of the filter press body frame (1). The connecting bolt (14) is threadedly connected to the filter press body frame (1). A mounting block (11) is provided on one side of the cross beam plate (6), and the mounting block (11) The protective frame (7) is connected to the crossbeam plate (6) by screws. An electric telescopic rod (17) is arranged below the mounting block (11), and the electric telescopic rod (17) is connected to the protective frame (7) and the mounting block (11) by screws. A sealing gasket (24) is arranged between the protective frame (7) and the drain pipe (9), and the sealing gasket (24) fits the protective frame (7) and the drain pipe (9). A vibrator (10) is arranged outside the protective frame (7), two vibrators (10) are arranged, and the vibrator (10) is connected to the protective frame (7) by screws.

2. The external protection device for a filter press according to claim 1, characterized in that: Both ends of the protection frame (7) are provided with a first guide groove (16), and the first guide groove (16) and the protection frame (7) are stamped into an integral structure. Both sides of the protection frame (7) are provided with guide rods (8), and the guide rods (8) are connected to the filter press body frame (1) by screws. One end of the guide rod (8) extends into the interior of the first guide groove (16), and the guide rod (8) is slidably connected to the protection frame (7). One end of the guide rod (8) is provided with a limit block (19), and the limit block (19) is connected to the guide rod (8) by screws.

3. The external protection device for a filter press according to claim 1, characterized in that: The lower end of the filter frame (4) is provided with a water outlet (25), and the water outlet (25) and the filter frame (4) are provided as an integral structure. A filter plate (21) is provided inside the filter frame (4), and the filter plate (21) is connected to the filter frame (4) by screws. Connecting ears (5) are provided on both sides of the filter plate (21), and the connecting ears (5) are connected to the filter frame (4) by screws. The connecting ears (5) are fitted with a cross beam (6), and the connecting ears (5) are slidably connected to the cross beam (6). A roller (20) is provided inside the connecting ear (5), and the roller (20) is rotatably connected to the connecting ear (5), and the roller (20) is fitted with the cross beam (6).

4. The external protection device for a filter press according to claim 3, characterized in that: A first slide groove (23) is provided on the inner wall of the two cross beam plates (6), and the first slide groove (23) and the cross beam plate (6) are stamped into an integral structure. A first slider (22) is provided on both sides of the filter frame (4), and the first slider (22) is connected to the filter frame (4) by screws. One end of the first slider (22) extends to the inside of the first slide groove (23), and the first slider (22) is slidably connected to the filter frame (4).

5. The external protection device for a filter press according to claim 1, characterized in that: Adjustment seats (28) are provided on both sides of the hydraulic telescopic cylinder (15), and the adjustment seats (28) are connected to the filter press body frame (1) by screws. An adjustment rod (30) is provided on one side of the adjustment seat (28), and the adjustment rod (30) is connected to the push plate (12) by screws. A telescopic cavity (29) is provided inside the adjustment seat (28), and the telescopic cavity (29) and the adjustment seat (28) are stamped into an integrated structure, and one end of the adjustment rod (30) extends to the inside of the telescopic cavity (29).

6. The external protection device for a filter press according to claim 5, characterized in that: A guide ring (31) is provided between the adjusting rod (30) and the adjusting seat (28), and the guide ring (31) is provided inside the telescopic cavity (29). The guide ring (31) and the adjusting seat (28) are connected by screws. A second guide groove (32) is provided inside the guide ring (31). Three second guide grooves (32) are provided, and the three second guide grooves (32) are sequentially provided on the guide ring (31). A guide rail (33) is provided outside the adjusting rod (30). Three guide rails (33) are provided, and the guide rail (33) is connected to the adjusting rod (30) by screws. One end of the guide rail (33) extends to the inside of the second guide groove (32), and the guide rail (33) is slidably connected to the guide ring (31).

7. The external protection device for a filter press according to claim 1, characterized in that: A second slide groove (26) is provided on the inner wall of the two cross beam plates (6), and the second slide groove (26) and the cross beam plate (6) are stamped into an integral structure. A second slider (27) is provided on both sides of the push plate (12), and the second slider (27) is connected to the push plate (12) by bolts. One end of the second slider (27) extends to the inside of the second slide groove (26), and the second slider (27) is slidably connected to the cross beam plate (6).

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