CN213823611U - External protection device for filter press - Google Patents

Abstract

The utility model discloses an external protector for pressure filter relates to pressure filter technical field, does not have corresponding protector for solving the pressure filter, and the water that the filter-pressing produced all is direct the drippage subaerially, and the centre is not handled, and the subaerial water machine that drips can appear splashing, and the water that produces the filter-pressing that can not be fine is collected, increases the problem of subsequent degree of difficulty. The filter press machine body frame is provided with two, all is provided with card and groove on the side end wall of two filter press machine body frames, the both sides of filter press machine body frame all are provided with the crossbeam board, one side of filter press machine body frame is provided with the inlet, the opposite side of filter press machine body frame is provided with the thrust plate, one side of thrust plate is provided with the filter frame, one side of filter frame is provided with bulldozes the board, one side that bulldozes the board is provided with the hydraulic stretching cylinder, the top of crossbeam board is provided with the controller, the below of crossbeam board is provided with the protection frame, the below of protection frame is provided with the drain pipe.

Description

External protection device for filter press

Technical Field

The utility model relates to a pressure filter technical field specifically is an external protector for pressure filter.

Background

At present, in the production process, a filter press is an important machine and has a solid-liquid separation function, and the filter press utilizes a special filter medium to apply a certain pressure to an object, so that liquid is dialyzed out. The method is applied to chemical production at the beginning of the 18 th century, and is still widely applied to the industries of chemical industry, pharmacy, metallurgy, dye, food, brewing, ceramics, environmental protection and the like until now.

The pressure filter that uses now does not have corresponding protector, and the water that the filter-pressing produced all directly drips subaerially, and the centre is not handled, drips subaerial water machine and can appear spattering, and the water that produces the filter-pressing that can not be fine is collected, increases subsequent degree of difficulty, can not satisfy the user demand. Therefore, there is a need in the market for an external guard for filter presses to solve these problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an external protector for pressure filter to propose the pressure filter and do not have corresponding protector in solving above-mentioned background art, the water that the filter-pressing produced all is that direct drippage subaerial, and the centre is not handled, and the subaerial water machine that drips can sputter appears, and the water that produces the filter-pressing that can not be fine is collected, increases the problem of subsequent degree of difficulty.

In order to achieve the above object, the utility model provides a following technical scheme: an external protection device for a filter press comprises two filter press body frames, wherein two side end walls of the two filter press body frames are provided with a clamp and a groove, two sides of each filter press body frame are provided with a cross beam plate, one end of each cross beam plate extends into the clamp and the groove, one side of each filter press body frame is provided with a liquid inlet, the liquid inlet and the filter press body frames are of an integrated structure, the other side of each filter press body frame is provided with a thrust plate, the thrust plate is connected with the filter press body frames through screws, one side of each thrust plate is provided with a filter frame, the filter frames are provided with a plurality of filter frames, one side of each filter frame is provided with a push plate, one side of each push plate is provided with a hydraulic telescopic cylinder, the hydraulic telescopic cylinders are connected with the push plates and the filter press body frames through screws, and a controller is arranged above each cross beam plate, and the controller passes through bolted connection with the crossbeam board, the below of crossbeam board is provided with the protection frame, and the protection frame is provided with two, the below of protection frame is provided with the drain pipe, and the one end of drain pipe extends to the inside of protection frame.

Preferably, one side of the crossbeam plate is provided with a connecting bolt, one end of the connecting bolt penetrates through the crossbeam plate and extends to the inside of the filter press body frame, the connecting bolt is in threaded connection with the filter press body frame, one side of the crossbeam plate is provided with an installation block, the installation block is in screwed connection with the crossbeam plate, an electric telescopic rod is arranged below the installation block, and the electric telescopic rod is in screwed connection with the protection frame and the installation block.

Preferably, a sealing gasket is arranged between the protective frame and the drain pipe, the sealing gasket is attached to the protective frame and the drain pipe, two vibrators are arranged outside the protective frame, and the vibrators are connected with the protective frame through screws.

Preferably, all be provided with first guide way on the both ends of protection frame, and first guide way and protection frame punching press integral structure, the both sides of protection frame all are provided with the guide bar, and the guide bar passes through screw connection with pressure filter organism frame, the one end of guide bar extends to the inside of first guide way, and guide bar and protection frame sliding connection, the one end of guide bar is provided with the stopper, and the stopper passes through screw connection with the guide bar.

Preferably, the lower extreme of filter frame is provided with the delivery port, and delivery port and filter frame set up structure as an organic whole, the inside of filter frame is provided with the filter plate, and the filter plate passes through the screw connection with the filter frame, the both sides of filter plate all are provided with the engaging lug, and the engaging lug passes through the screw connection with the filter frame, the engaging lug laminates with the crossbeam board, and engaging lug and crossbeam board sliding connection, the inside of engaging lug is provided with the gyro wheel, and the gyro wheel rotates with the engaging lug to be connected, the gyro wheel laminates with the crossbeam board.

Preferably, two all be provided with first spout on the inner wall of crossbeam board, and first spout and crossbeam board punching press structure as an organic whole, the both sides of filter frame all are provided with first slider, and just first slider passes through screw connection with the filter frame, the one end of first slider extends to the inside of first spout, and first slider and filter frame sliding connection.

Preferably, the both sides of hydraulic telescoping cylinder all are provided with the regulation seat, and adjust the seat and pass through the screw connection with pressure filter organism frame, one side of adjusting the seat is provided with the regulation pole, and adjusts the pole and pass through the screw connection with the bulldozing plate, the inside of adjusting the seat is provided with flexible chamber, and flexible chamber and the punching press of adjusting the seat structure as an organic whole, the one end of adjusting the pole extends to the inside in flexible chamber.

Preferably, adjust and be provided with the guide ring between pole and the regulation seat, and the guide ring setting is in the inside in flexible chamber, the guide ring passes through the screw connection with the regulation seat, the inside of guide ring is provided with the second guide way, and the second guide way is provided with threely, and three second guide way sets gradually on the guide ring, the outside of adjusting the pole is provided with the direction slide rail, and the direction slide rail is provided with threely, and the direction slide rail passes through the screw connection with the regulation pole, the one end of direction slide rail extends to the inside of second guide way, and direction slide rail and guide ring sliding connection.

Preferably, two all be provided with the second spout on the inner wall of crossbeam board, and second spout and crossbeam board punching press structure as an organic whole, the both sides that bulldoze the board all are provided with the second slider, and the second slider with bulldoze the board and pass through bolted connection, the one end of second slider extends to the inside of second spout, and second slider and crossbeam board sliding connection.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a device passes through protection frame, drain pipe, vibrator and electric telescopic handle's setting, can slide through the guide bar between protection frame and the pressure filter organism frame, can drive the protection frame and remove under electric telescopic handle's effect to realize the relation of connection between two protection frames and the drain pipe, can discharge the log raft that extrudes with the help of the drain pipe, avoid water directly to drop subaerial sputtering, the vibrator can drive the protection frame vibration, can avoid the mud sediment sheet material to remain on the protection frame. The problem of water that the filter-pressing produced directly drips to the subaerial sputtering that appears is solved.

2. The utility model discloses a device is through the setting of first slider, first spout, second spout and second slider, and first slider and first spout can play the spacing effect of direction to the filter frame that removes, and second spout and second slider can play the spacing effect of direction to the bulldozing board that removes, have ensured that the filter frame removes the in-process with the crossbeam board with bulldozing the board and be in the vertical state for extrusion to sewage is even, indirect improvement the filter-pressing effect. The problem of extrusion force unbalance among the extrusion process lead to the filter frame crooked with bulldozing the board, the filter-pressing effect is not good is solved.

3. The utility model discloses a device is through adjusting the seat, adjusting the setting of pole and guide ring, adjust the pole and can carry out corresponding slip along with the flexible and regulation seat of hydraulic telescoping cylinder, the guide ring plays the spacing effect of direction to gliding regulation pole to having improved and having adjusted the gliding stability of pole, adjust the indirect both sides to hydraulic telescoping cylinder of pole and play spacing effect, ensured that hydraulic telescoping cylinder is in straight state, avoid the uneven bending of hydraulic telescoping cylinder atress to appear blowing out, play the effect of protection to hydraulic telescoping cylinder. The problem of hydraulic telescoping cylinder not have corresponding limiting displacement in the working process, the uneven atress of hydraulic telescoping cylinder appears crooked easily, appears exploding the jar is solved.

Drawings

FIG. 1 is a front view structural diagram of the present invention;

FIG. 2 is a side view of the structure of the present invention;

FIG. 3 is a connection diagram of the protective frame and the cross beam plate of the present invention;

FIG. 4 is a connection diagram of the drain pipe and the protection frame of the present invention;

FIG. 5 is a diagram showing the connection relationship between the hydraulic telescopic cylinder and the frame and the pushing plate of the filter press;

fig. 6 is a connection relationship diagram of the guide ring, the adjusting seat and the adjusting rod of the present invention.

In the figure: 1. a filter press body frame; 2. a liquid inlet; 3. a thrust plate; 4. a filter frame; 5. connecting lugs; 6. a beam plate; 7. a protective frame; 8. a guide bar; 9. a drain pipe; 10. a vibrator; 11. mounting blocks; 12. a push plate; 13. a controller; 14. a connecting bolt; 15. a hydraulic telescopic cylinder; 16. a first guide groove; 17. an electric telescopic rod; 18. a card and a slot; 19. a limiting block; 20. a roller; 21. filtering the plate; 22. a first slider; 23. a first chute; 24. a gasket; 25. a water outlet; 26. a second chute; 27. a second slider; 28. an adjusting seat; 29. a telescoping chamber; 30. adjusting a rod; 31. a guide ring; 32. a second guide groove; 33. and a guide slide rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-6, the present invention provides an embodiment: an external protection device for a filter press comprises filter press body frames 1, the filter press body frames 1 are provided with two, the side end walls of the two filter press body frames 1 are respectively provided with a clamp and a groove 18, the clamp and the groove 18 are convenient for a cross beam plate 6 and the filter press body frames 1 to be installed and fixed, the two sides of the filter press body frames 1 are respectively provided with the cross beam plate 6, one end of the cross beam plate 6 extends into the clamp and the groove 18, one side of the filter press body frame 1 is provided with a liquid inlet 2, the liquid inlet 2 and the filter press body frame 1 are arranged into an integral structure, the other side of the filter press body frame 1 is provided with a thrust plate 3, the thrust plate 3 is connected with the filter press body frame 1 through screws, one side of the thrust plate 3 is provided with a filter frame 4, the filter frame 4 is provided with a plurality of filter frames, one side of the filter frame 4 is provided with a thrust plate 12, one side of the thrust plate 12 is provided with a hydraulic telescopic cylinder 15, and hydraulic telescoping cylinder 15 passes through the screw connection with bulldozing board 12 and pressure filter organism frame 1, hydraulic telescoping cylinder 15 drives bulldozing board 12 and promotes, extrude filter frame 4 with the help of the extrusion effort between bulldozing board 12 and thrust plate 3, thereby can extrude water, the top of crossbeam board 6 is provided with controller 13, and controller 13 passes through the screw connection with crossbeam board 6, the below of crossbeam board 6 is provided with protection frame 7, protection frame 7 is provided with two, protection frame 7 avoids extruding the discharged water sputtering, the below of protection frame 7 is provided with drain pipe 9, and the one end of drain pipe 9 extends to the inside of protection frame 7, drain pipe 9 can excrete the extruded discharged water.

Further, one side of crossbeam board 6 is provided with connecting bolt 14, and connecting bolt 14's one end runs through crossbeam board 6 and extends to the inside of pressure filter organism frame 1, connecting bolt 14 and pressure filter organism frame 1 threaded connection, one side of crossbeam board 6 is provided with installation piece 11, and installation piece 11 and crossbeam board 6 pass through the screw connection, the below of installation piece 11 is provided with electric telescopic handle 17, and electric telescopic handle 17 passes through the screw connection with protection frame 7 and installation piece 11. The cross beam plate 6 and the filter press body frame 1 can be fixedly installed through the connecting bolt 14, and the electric telescopic rod 17 drives the protection frame 7 to horizontally move, so that the protection frame 7 can be separated, and the mud dirt plate can be conveniently discharged.

Further, a sealing gasket 24 is arranged between the protective frame 7 and the drain pipe 9, the sealing gasket 24 is attached to the protective frame 7 and the drain pipe 9, the two vibrators 10 are arranged outside the protective frame 7, and the two vibrators 10 are connected with the protective frame 7 through screws. The vibrator 10 drives the protective frame 7 to vibrate, materials can be shaken during blanking, the blanking effect is improved, the sealing gasket 24 improves the sealing performance between the protective frame 7 and the drain pipe 9, and water leakage is effectively avoided.

Further, all be provided with first guide way 16 on the both ends of protection frame 7, and first guide way 16 and 7 punching press integral structure of protection frame, the both sides of protection frame 7 all are provided with guide bar 8, and guide bar 8 passes through screw connection with pressure filter organism frame 1, the one end of guide bar 8 extends to the inside of first guide way 16, and guide bar 8 and 7 sliding connection of protection frame, the one end of guide bar 8 is provided with stopper 19, and stopper 19 passes through screw connection with guide bar 8. Can lead spacing to the protection frame 7 that removes through first guide way 16 and guide bar 8 to the stability that protection frame 7 removed has been improved, and stopper 19 can avoid protection frame 7 to remove and break away from guide bar 8.

Further, the lower extreme of filter frame 4 is provided with delivery port 25, and delivery port 25 sets up structure as an organic whole with filter frame 4, the inside of filter frame 4 is provided with filter plate 21, and filter plate 21 passes through bolted connection with filter frame 4, the both sides of filter plate 21 all are provided with engaging lug 5, and engaging lug 5 passes through bolted connection with filter frame 4, engaging lug 5 laminates mutually with crossbeam board 6, and engaging lug 5 and 6 sliding connection of crossbeam board, the inside of engaging lug 5 is provided with gyro wheel 20, and gyro wheel 20 rotates with engaging lug 5 to be connected, gyro wheel 20 laminates mutually with crossbeam board 6. The filter plates 21 can be mounted on the cross beam plates 6 through the connecting lugs 5, a supporting effect is provided for the cross beam plates 6, and the rollers 20 facilitate the sliding of the filter plates 21 along the cross beam plates 6, so that the filter plates 21 can be conveniently moved, and mud and dirt plates can be removed.

Further, all be provided with first spout 23 on the inner wall of two crossbeam boards 6, and first spout 23 and crossbeam board 6 punching press structure as an organic whole, the both sides of straining frame 4 all are provided with first slider 22, and first slider 22 passes through screw connection with straining frame 4, and the one end of first slider 22 extends to the inside of first spout 23, and first slider 22 and straining frame 4 sliding connection. Can play the spacing effect of direction through first slider 22 and first spout 23 to the filter frame 4 that removes, improve the stability that filter frame 4 removed, ensure that the filter frame 4 that removes is balanced, the inside mud dirt extrusion force of filter frame 4 can not appear inhomogeneous, has improved the filter-pressing effect of filter frame 4.

Furthermore, both sides of the hydraulic telescopic cylinder 15 are provided with adjusting seats 28, the adjusting seats 28 are connected with the filter press body frame 1 through screws, one side of each adjusting seat 28 is provided with an adjusting rod 30, the adjusting rods 30 are connected with the pushing and pressing plate 12 through screws, a telescopic cavity 29 is arranged inside each adjusting seat 28, the telescopic cavity 29 and the adjusting seats 28 are punched into an integral structure, and one end of each adjusting rod 30 extends to the inside of the telescopic cavity 29. The adjusting rod 30 slides in the telescopic cavity 29 along with the extension of the hydraulic telescopic cylinder 15, so that the hydraulic telescopic cylinder 15 can be limited, the hydraulic telescopic cylinder 15 is in a straight state, the hydraulic telescopic cylinder 15 is protected indirectly, and the cylinder explosion caused by uneven stress of the hydraulic telescopic cylinder 15 is avoided.

Further, a guide ring 31 is arranged between the adjusting rod 30 and the adjusting seat 28, the guide ring 31 is arranged inside the telescopic cavity 29, the guide ring 31 is connected with the adjusting seat 28 through screws, a second guide groove 32 is arranged inside the guide ring 31, the number of the second guide grooves 32 is three, the three second guide grooves 32 are sequentially arranged on the guide ring 31, a guide slide rail 33 is arranged outside the adjusting rod 30, the number of the guide slide rails 33 is three, the guide slide rail 33 is connected with the adjusting rod 30 through screws, one end of the guide slide rail 33 extends into the second guide groove 32, and the guide slide rail 33 is slidably connected with the guide ring 31. The guide ring 31 and the guide slide rail 33 can guide and limit the sliding adjusting rod 30, and the sliding stability of the adjusting rod 30 is improved.

Further, all be provided with second spout 26 on the inner wall of two crossbeam boards 6, and second spout 26 and crossbeam board 6 punching press structure as an organic whole, the both sides that push away board 12 all are provided with second slider 27, and second slider 27 with push away board 12 and pass through bolted connection, the one end of second slider 27 extends to the inside of second spout 26, and second slider 27 and crossbeam board 6 sliding connection. The second sliding block 27 and the second sliding groove 26 can guide the movable pushing plate 12 to be limited, so that the pushing plate 12 is in a vertical state with the beam plate 6 when moving, the pushing plate 12 is uniformly stressed when contacting the filter frame 4, and the extrusion effect is improved.

The working principle is as follows: when the device is used, the electric telescopic rod 17 is driven, the protective frame 7 and the filter press body frame 1 can slide through the guide rod 8, the protective frame 7 can be driven to move under the action of the electric telescopic rod 17, the two protective frames 7 and the drain pipe 9 are spliced into an integral structure, sewage to be treated is injected into the filter frame 4 through the liquid inlet 2, the hydraulic telescopic cylinder 15 is driven, the filter frame 4 and the push plate 12 are both in sliding connection with the cross beam plate 6, the push plate 12 is driven to horizontally interact along the cross beam plate 6 under the action of the hydraulic telescopic cylinder 15, the filter frame 4 is extruded when the push plate 12 is in contact with the filter frame 4, so that water inside the filter frame 4 can be extruded, sewage can be extruded from the water outlet 25 and is discharged from the drain pipe 9 when dropping into the protective frame 7, water can not directly drop to the ground to cause sputtering, the hydraulic telescopic cylinder 15 is reversely driven to reset the push plate 12 after the water extrusion is thorough, the protection frame 7 is separated by driving the electric telescopic rod 17, the filter frame 4 is separated, the sludge plates accumulated on the filter plate 21 are removed, the vibrator 10 on the protection frame 7 is started, and the vibrator 10 drives the protection frame 7 to shake, so that the falling sludge plates are prevented from being adhered to the protection frame 7.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. The utility model provides an external protector for pressure filter, includes pressure filter organism frame (1), its characterized in that: the filter press comprises two filter press body frames (1), wherein the side end walls of the two filter press body frames (1) are respectively provided with a clamp and a groove (18), the two sides of each filter press body frame (1) are respectively provided with a cross beam plate (6), one end of each cross beam plate (6) extends into the clamp and the groove (18), one side of each filter press body frame (1) is provided with a liquid inlet (2), the liquid inlets (2) and the filter press body frames (1) are arranged into an integral structure, the other side of each filter press body frame (1) is provided with a thrust plate (3), the thrust plates (3) are connected with the filter press body frames (1) through screws, one side of each thrust plate (3) is provided with a filter frame (4), the filter frames (4) are provided with a plurality of thrust plates (12), one side of each thrust plate (12) is provided with a hydraulic telescopic cylinder (15), and the hydraulic telescopic cylinder (15) is connected with the pushing plate (12) and the filter press body frame (1) through screws, a controller (13) is arranged above the cross beam plate (6), the controller (13) is connected with the cross beam plate (6) through screws, a protective frame (7) is arranged below the cross beam plate (6), two protective frames (7) are arranged, a drain pipe (9) is arranged below the protective frame (7), and one end of the drain pipe (9) extends to the inside of the protective frame (7).

2. An external protector for a filter press according to claim 1, characterised in that: one side of the cross beam plate (6) is provided with a connecting bolt (14), one end of the connecting bolt (14) penetrates through the cross beam plate (6) and extends to the inside of the filter press body frame (1), the connecting bolt (14) is in threaded connection with the filter press body frame (1), one side of the cross beam plate (6) is provided with an installation block (11), the installation block (11) is connected with the cross beam plate (6) through screws, an electric telescopic rod (17) is arranged below the installation block (11), and the electric telescopic rod (17) is connected with the protection frame (7) and the installation block (11) through screws.

3. An external protector for a filter press according to claim 1, characterised in that: be provided with sealed pad (24) between protection frame (7) and drain pipe (9), and sealed pad (24) laminate mutually with protection frame (7) and drain pipe (9), the outside of protection frame (7) is provided with vibrator (10), and vibrator (10) are provided with two, and vibrator (10) pass through the screw connection with protection frame (7).

4. An external protector for a filter press according to claim 1, characterised in that: all be provided with first guide way (16) on the both ends of protection frame (7), and first guide way (16) and protection frame (7) punching press integral structure, the both sides of protection frame (7) all are provided with guide bar (8), and guide bar (8) pass through screw connection with pressure filter organism frame (1), the one end of guide bar (8) extends to the inside of first guide way (16), and guide bar (8) and protection frame (7) sliding connection, the one end of guide bar (8) is provided with stopper (19), and stopper (19) pass through screw connection with guide bar (8).

5. An external protector for a filter press according to claim 1, characterised in that: the lower extreme of filter frame (4) is provided with delivery port (25), and delivery port (25) and filter frame (4) set up structure as an organic whole, the inside of filter frame (4) is provided with filter plate (21), and filter plate (21) and filter frame (4) pass through screw connection, the both sides of filter plate (21) all are provided with engaging lug (5), and engaging lug (5) and filter frame (4) pass through screw connection, engaging lug (5) laminate mutually with crosspiece board (6), and engaging lug (5) and crosspiece board (6) sliding connection, the inside of engaging lug (5) is provided with gyro wheel (20), and gyro wheel (20) rotate with engaging lug (5) and be connected, gyro wheel (20) laminate mutually with crosspiece board (6).

6. An external protector for a filter press according to claim 5, wherein: two all be provided with first spout (23) on the inner wall of crossbeam board (6), and first spout (23) and crossbeam board (6) punching press structure as an organic whole, the both sides of straining frame (4) all are provided with first slider (22), and just first slider (22) pass through screw connection with straining frame (4), the one end of first slider (22) extends to the inside of first spout (23), and first slider (22) and straining frame (4) sliding connection.

7. An external protector for a filter press according to claim 1, characterised in that: the both sides of hydraulic pressure telescoping cylinder (15) all are provided with adjusts seat (28), and adjust seat (28) and filter press organism frame (1) and pass through bolted connection, the one side of adjusting seat (28) is provided with adjusts pole (30), and adjusts pole (30) and push plate (12) and pass through bolted connection, the inside of adjusting seat (28) is provided with flexible chamber (29), and flexible chamber (29) and adjust seat (28) punching press integral structure, the one end of adjusting pole (30) extends to the inside in flexible chamber (29).

8. An external protector for a filter press according to claim 7, wherein: adjust pole (30) and adjust and be provided with between seat (28) guide ring (31), and guide ring (31) set up the inside in flexible chamber (29), guide ring (31) and regulation seat (28) pass through screw connection, the inside of guide ring (31) is provided with second guide way (32), and second guide way (32) are provided with threely, and three second guide way (32) set gradually on guide ring (31), the outside of adjusting pole (30) is provided with direction slide rail (33), and direction slide rail (33) are provided with threely, and guide slide rail (33) and adjust pole (30) and pass through screw connection, the one end of direction slide rail (33) extends to the inside of second guide way (32), and direction slide rail (33) and guide ring (31) sliding connection.

9. An external protector for a filter press according to claim 1, characterised in that: two all be provided with second spout (26) on the inner wall of crossbeam board (6), and second spout (26) and crossbeam board (6) punching press structure as an organic whole, the both sides that push away board (12) all are provided with second slider (27), and second slider (27) with push away board (12) and pass through bolted connection, the one end of second slider (27) extends to the inside of second spout (26), and second slider (27) and crossbeam board (6) sliding connection.

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