Centrifugal filter pressing device for construction site slurry

Abstract

The invention relates to the technical field of slurry desanding, and discloses a construction site slurry centrifugal filter pressing device which comprises a first cross beam, a second cross beam is fixed to one side of the first cross beam, a pull plate trolley body is arranged at the top of the second cross beam, and a filter plate is movably mounted on one side of the second cross beam. Supporting legs are fixed to the bottoms of the first cross beam and the second cross beam, a moving block is fixed to one side of the pulling plate trolley body, and a micro motor is movably installed at the bottom end of the moving block. A control panel is controlled to enable an air pump to control a micro air cylinder to extend and drive a rack to move downwards, the rack is meshed with a gear, then the gear is driven to rotate, a micro motor rotates, and after the micro motor rotates to be in a horizontal state, the micro motor is started to rotate to drive a first rotating shaft to start to rotate rapidly; the knocking balls touch the filter plate, so that soil adhered to the bottom of the filter plate falls off, and the effect of removing large silt adhered to the bottom of the filter plate is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mud sand removal, in particular to a construction site mud centrifugal filter press device. Background Art

[0002] Mud is a semi-colloidal suspension formed by tiny particles of clay dispersed in water and mixed with water. In colloid chemistry, solid clay is called dispersed phase or solid phase, and water is called medium or liquid phase. If the solid phase is dispersed into molecules or ions, and there is no interface between the solid phase and the liquid phase, it is called a true solution, such as a solution of salt dissolved in water. Mud is a commonly used flushing fluid for drilling into complex formations. It is widely used in the drilling industry. During the processing of mud, it is necessary to remove sand from it, so mud desanding equipment is needed.

[0003] The above-mentioned existing technical solutions have the following defects: when the existing filter press device is performing filter press, after the filter press is completed, it is necessary to use a plate pulling trolley to pull the filter plates apart one by one, so that the silt filtered between the two filter plates automatically falls off due to gravity, and then some filter plates may not squeeze out the water thoroughly enough, resulting in the silt containing some water and still sticking to the filter plates. At this time, manual cleaning is required. At the same time, although the existing mud centrifugal filter press device has the function of performing filter press after centrifugation, it uses a filter screen with a uniform mesh size for centrifugal filtration during centrifugation. The size of the silt to be filtered is different when used in different usage scenarios. If it cannot be adjusted, incomplete filtration or reduced filtration efficiency will occur. Therefore, we propose a new type of construction site mud centrifugal filter press device. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a construction site mud centrifugal filter press device, which solves the problem in the above-mentioned background technology that a large amount of mud and sand are still stuck on the surface of some filter plates and require manual auxiliary cleaning and centrifugation, and that using a filter of the same mesh size will result in incomplete filtration or reduced filtration efficiency.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a construction site mud centrifugal filter press device, comprising a first crossbeam, a second crossbeam is fixed on one side of the first crossbeam, a pull plate trolley is arranged on the top of the second crossbeam, a filter plate is movably installed on one side of the second crossbeam, supporting legs are fixed to the bottoms of the first and second crossbeams, a moving block is fixed on one side of the pull plate trolley, a micro motor is movably installed on the bottom of the moving block, a first rotating shaft is fixed to the power output end of the micro motor, a first connecting rod is movably installed on the outer wall of the first rotating shaft, a knocking ball is fixed to the bottom end of the first connecting rod, an air pump is fixed to the bottom of one side of the first crossbeam, and a first support rod is fixed to the middle of one side of the first crossbeam. A control plate is fixed to one side of the first support rod, a telescopic cylinder is fixed to the other side of the first support rod, a movable extrusion plate is fixed to the power output end of the telescopic cylinder, a second water guide pipe is fixed through the bottom of one side of the movable extrusion plate, a fixed extrusion plate is fixed to one side of one end of the second cross beam, a second support rod and a support seat are fixed to the top of one end of the second cross beam, an outer shell is fixed to the top of the support seat, a servo motor is fixed to one end of the second support rod, a second rotating shaft is fixed to the power output end of the servo motor, a second connecting rod is fixed to the bottom of the second rotating shaft, a centrifugal cylinder is fixed to the bottom of the second connecting rod, a filter cylinder is rotatably connected inside the centrifugal cylinder, and a sand guide pipe is fixed to the bottom of the support seat.

[0008] As a further improvement of the technical solution: a sliding groove is provided through one side of the second cross beam, a sliding block is fixed to the middle of one side of the moving block, and the sliding block is slidably connected to the moving block.

[0009] As a further improvement of the technical solution: a micro cylinder is fixed to the middle of one side of the moving block, and a rack is fixed to the power output end of the micro cylinder.

[0010] As a further improvement of the present technical solution: a first hinged seat is fixed at the bottom of the moving block, the top of the micro motor is rotatably connected to the bottom of the first hinged seat, a gear is fixed on one side of the connection between the micro motor and the first hinged seat, the gear and the rack are meshed with each other, and the number of teeth on the rack is equal to one quarter of the number of teeth on the gear.

[0011] As a further improvement of the present technical solution: a second articulated seat is fixed to the outer wall of the first rotating shaft, the top of the first connecting rod is rotatably connected to the second articulated seat, a plurality of second articulated seats are provided, and the plurality of second articulated seats are located on the outer wall of the first rotating shaft and are arranged equidistantly, the knocking ball is hollow, the length of the first rotating shaft is equal to the length of the first beam, and the bottom of the first articulated seat and the middle of the filter plate are located on the same horizontal plane.

[0012] As a further improvement of the technical solution: the outer walls of the centrifugal cylinder and the filter cylinder are both penetrated with filter holes, and there are multiple filter holes. The filter holes on the outer wall of the centrifugal cylinder and the filter holes on the outer wall of the filter cylinder are arranged in a one-to-one correspondence.

[0013] As a further improvement of the technical solution: a slot is provided on one side of the top of the centrifugal cylinder, and a plurality of the slots are arranged equidistantly in an arc shape, and the spacing between the two slots at the two ends is equal to the diameter of the filter mesh hole.

[0014] As a further improvement of the technical solution: a clamping block is fixed on the top of the filter cartridge, the clamping block and the clamping groove are clamped with each other, and the filter cartridge is in a hollow cylindrical shape.

[0015] As a further improvement of the present technical solution: the central axis of the centrifugal cylinder, the central axis of the filter cylinder and the central axis of the outer shell are arranged in a colinear manner, and a feed trough is opened through the middle of the bottom of the centrifugal cylinder and the outer shell, the bottom of the feed trough is sealed and connected to the top of the sand guide pipe, and the horizontal height value of the centrifugal cylinder close to the feed trough is smaller than the horizontal height value of the centrifugal cylinder away from the feed trough.

[0016] As a further improvement of the technical solution: a first water guide pipe is sealed and penetrated through one side of the outer wall of the housing, a regulating valve is provided on the outer wall of the sand guide pipe, and the other end of the sand guide pipe is through-connected with a fixed extrusion plate.

[0017] (III) Beneficial effects

[0018] The present invention provides a construction site mud centrifugal filter press device, which has the following beneficial effects:

[0019] 1. This type of construction site mud centrifugal filter press device controls the control panel to make the air pump control the micro cylinder to extend, drive the rack to move downward, the rack engages with the gear, and then drives the gear to rotate, so that the micro motor rotates. After the micro motor rotates to a horizontal state, the micro motor is started to rotate, driving the first rotating shaft to start rotating rapidly, so that the knocking ball touches the filter plate, and then the mud sticking to the bottom of the filter plate is removed, thereby achieving the effect of removing large pieces of mud and sand sticking to the bottom of the filter plate.

[0020] 2. This type of construction site mud centrifugal filter press device changes the overlapping area of ​​the filter holes between the centrifugal cylinder and the filter cylinder by rotating the filter cylinder, thereby adjusting the aperture of the filter holes for filtering sand. When the card block is placed in different card slots, the overlapping area of ​​the filter holes is also different. At the same time, through the card block and the card slot, the filter cylinder can be rotated together with the centrifugal cylinder, thereby achieving rapid adjustment of the filter mesh diameter of the centrifugal filtration and improving the centrifugal effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a side view schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the right side of the present invention;

[0024] Figure 4 This is a structural schematic diagram of the plate pulling trolley body of the present invention;

[0025] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0026] Figure 6 It is a structural schematic diagram of the centrifugal cylinder of the present invention;

[0027] Figure 7 For the present invention Figure 6 An enlarged schematic diagram of the structure of part B.

[0028] In the figure: 1, first crossbeam; 2, supporting leg; 3, second crossbeam; 4, chute; 5, first supporting rod; 6, control panel; 7, air pump; 8, telescopic cylinder; 9, movable extrusion plate; 10, filter plate; 11, fixed extrusion plate; 12, moving block; 13, pull plate trolley; 14, slider; 15, micro cylinder; 16, first articulated seat; 17, gear; 18, rack; 19, micro motor; 20, first rotating shaft; 21. Second articulated seat; 22. First connecting rod; 23. Knocking ball; 24. Second supporting rod; 25. Servo motor; 26. Second rotating shaft; 27. Second connecting rod; 28. Outer shell; 29. ​​Support seat; 30. First water pipe; 31. Sand pipe; 32. Regulating valve; 33. Second water pipe; 34. Centrifugal cylinder; 35. Filter cylinder; 36. Filter mesh hole; 37. Feed chute; 38. Block; 39. Slot. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 7The present invention provides a technical solution: a construction site mud centrifugal filter press device, comprising a first crossbeam 1, a second crossbeam 3 is fixed on one side of the first crossbeam 1, a plate pulling trolley body 13 is arranged on the top of the second crossbeam 3, a filter plate 10 is movably installed on one side of the second crossbeam 3, a support leg 2 is fixed to the bottom of the first crossbeam 1 and the second crossbeam 3, a moving block 12 is fixed on one side of the plate pulling trolley body 13, a micro motor 19 is movably installed on the bottom of the moving block 12, a first rotating shaft 20 is fixed to the power output end of the micro motor 19, a first connecting rod 22 is movably installed on the outer wall of the first rotating shaft 20, a knocking ball 23 is fixed to the bottom of the first connecting rod 22, an air pump 7 is fixed to the bottom of one side of the first crossbeam 1, a first support rod 5 is fixed to the middle part of one side of the first crossbeam 1, and the first support rod 5 is fixed to the bottom of the first crossbeam 1. A control plate 6 is fixed on the side, a telescopic cylinder 8 is fixed on the other side of the first support rod 5, a mobile extrusion plate 9 is fixed on the power output end of the telescopic cylinder 8, a second water guide pipe 33 is fixed through the bottom of one side of the mobile extrusion plate 9, a fixed extrusion plate 11 is fixed on one side of one end of the second beam 3, a second support rod 24 and a support seat 29 are fixed on the top of one end of the second beam 3, an outer shell 28 is fixed on the top of the support seat 29, a servo motor 25 is fixed on one end of the second support rod 24, a second rotating shaft 26 is fixed on the power output end of the servo motor 25, a second connecting rod 27 is fixed on the bottom of the second rotating shaft 26, a centrifugal cylinder 34 is fixed on the bottom of the second connecting rod 27, a filter cylinder 35 is rotatably connected inside the centrifugal cylinder 34, and a sand guide tube 31 is fixed to the bottom of the support seat 29.

[0031] Among them, a sliding groove 4 is opened through one side of the second beam 3, and a slider 14 is fixed in the middle of one side of the moving block 12. The slider 14 is slidably connected with the moving block 12, so that when the pulling trolley body 13 moves, it can drive the moving block 12 to slide on the side of the second beam 3, and then drive the micro motor 19 at the bottom to move.

[0032] Among them, a micro cylinder 15 is fixed in the middle of one side of the moving block 12, and a rack 18 is fixed to the power output end of the micro cylinder 15. When the pulling plate trolley 13 pulls the filter plate 10, when the mud and sand do not fall off for a long time, the air pump 7 controls the micro cylinder 15 to extend by controlling the control panel 6.

[0033] Among them, a first hinge seat 16 is fixed at the bottom of the moving block 12, and the top of the micro motor 19 is rotatably connected to the bottom of the first hinge seat 16. A gear 17 is fixed on one side of the connection between the micro motor 19 and the first hinge seat 16, and the gear 17 and the rack 18 are meshed with each other. When the micro cylinder 15 is extended, the rack 18 is driven to move downward, and the rack 18 is meshed with the gear 17, thereby driving the gear 17 to rotate, so that the micro motor 19 is rotated. The number of teeth of the rack 18 is equal to one quarter of the number of teeth of the gear 17, so that the micro motor 19 can rotate from a vertical state to a horizontal state and then stop.

[0034] Among them, a second hinge seat 21 is fixed to the outer wall of the first rotating shaft 20, and the top of the first connecting rod 22 is rotatably connected to the second hinge seat 21. A plurality of second hinge seats 21 are provided, and the plurality of second hinge seats 21 are located on the outer wall of the first rotating shaft 20 and are arranged equidistantly. The knocking ball 23 is hollow, and the length of the first rotating shaft 20 is equal to the length of the first beam 1. The bottom of the first hinge seat 16 and the middle of the filter plate 10 are located on the same horizontal plane. After the micro motor 19 rotates to a horizontal state, the micro motor 19 is started to rotate, driving the first rotating shaft 20 to start rotating rapidly. Under the influence of centrifugal force, the first connecting rod 22 moves in a direction perpendicular to the first rotating shaft 20, so that the knocking ball 23 can touch the filter plate 10, thereby removing the sticky soil at the bottom of the filter plate 10.

[0035] Among them, the outer walls of the centrifugal cylinder 34 and the filter cylinder 35 are penetrated with filter holes 36, and there are multiple filter holes 36. The filter holes 36 on the outer wall of the centrifugal cylinder 34 and the filter holes 36 on the outer wall of the filter cylinder 35 are arranged in a one-to-one correspondence. By rotating the filter cylinder 35, the overlapping area of ​​the filter holes 36 between the centrifugal cylinder 34 and the filter cylinder 35 is changed, thereby adjusting the pore size of the filter holes 36 for filtering sand.

[0036] Among them, a slot 39 is opened on one side of the top of the centrifugal barrel 34, and a plurality of slots 39 are arranged equidistantly in an arc shape. The spacing value between the two slots 39 at both ends is equal to the diameter value of the filter hole 36. A block 38 is fixed on the top of the filter barrel 35, and the block 38 and the slot 39 are engaged with each other. The filter barrel 35 is a hollow cylindrical shape, so that when the block 38 is placed in different slots 39, the overlapping area of ​​the filter hole 36 is also different. At the same time, through the engagement of the block 38 and the slot 39, the filter barrel 35 can rotate together with the centrifugal barrel 34.

[0037] Among them, the central axis of the centrifugal cylinder 34, the central axis of the filter cylinder 35 and the central axis of the outer shell 28 are arranged in a colinear manner, and a feed trough 37 is opened through the middle of the bottom of the centrifugal cylinder 34 and the outer shell 28. The bottom of the feed trough 37 is sealed and connected to the top of the sand guide tube 31, and the horizontal height value of the centrifugal cylinder 34 close to the feed trough 37 is less than the horizontal height value of the centrifugal cylinder 34 away from the feed trough 37. By starting the servo motor 25 to drive the second rotating shaft 26 to rotate, the centrifugal cylinder 34 and the filter cylinder 35 are driven to rotate together, and the moisture is discharged from the filter hole 36. The discharged water enters the interior of the outer shell 28 and flows out through the first water guide pipe 30. The soil containing moisture in the centrifugal cylinder 34 flows from the feed trough 37 into the sand guide tube 31.

[0038] Among them, a first water pipe 30 is sealed and connected through one side of the outer wall of the outer shell 28, a regulating valve 32 is provided on the outer wall of the sand guide pipe 31, and the other end of the sand guide pipe 31 is connected to the fixed extrusion plate 11. When the centrifugal cylinder 34 is centrifuged, the regulating valve 32 is closed to prevent excessive water from entering the sand guide pipe 31.

[0039] The working principle of the present invention is as follows: first, the filter cartridge 35 is rotated to change the overlapping area of ​​the filter holes 36 between the centrifugal cartridge 34 and the filter cartridge 35. When the clamping block 38 is placed in different clamping slots 39, the overlapping area of ​​the filter holes 36 is also different. At the same time, the clamping block 38 is engaged with the clamping slot 39, so that the filter cartridge 35 can rotate together with the centrifugal cartridge 34. Then, the mud to be filtered is introduced into the centrifugal cartridge 34. When the servo motor 25 is started to drive the second rotating shaft 26 to rotate, the centrifugal cartridge 34 and the filter cartridge 35 are driven to rotate together, and the water is filtered out from the filter holes 36. The discharged water enters the outer shell 28 and flows out through the first water conduit 30. The soil still containing water in the centrifugal cylinder 34 flows into the sand conduit 31 from the feed trough 37 and flows into the middle of the filter plate 10 from the sand conduit 31. After waiting for the filter plate 10 to adsorb for a period of time, the air pump 7 controls the telescopic cylinder 8 to extend by controlling the control panel 6, driving the mobile extrusion plate 9 to push and extrude the multiple filter plates 10 toward the fixed extrusion plate 11. The squeezed water flows out from the second water conduit 33. After the extrusion is completed, the telescopic cylinder 8 is controlled to shorten, and the filter plates are moved by controlling the pull plate trolley 13. 10 is pulled, and the slider 14 is slidably connected with the moving block 12, so that when the pull-plate trolley body 13 moves, it can drive the moving block 12 to slide on one side of the second cross beam 3, thereby driving the micro motor 19 at the bottom to move. When the mud and sand are slow to fall, the air pump 7 controls the micro cylinder 15 to extend by controlling the control panel 6, driving the rack 18 to move downward, the rack 18 is meshed with the gear 17, and then drives the gear 17 to rotate, so that the micro motor 19 rotates. The number of teeth of the rack 18 is equal to one-fourth of the number of teeth of the gear 17, so that the micro motor 19 It can rotate from a vertical state to a horizontal state and then stop. After the micro motor 19 rotates to a horizontal state, the micro motor 19 is started to rotate, driving the first rotating shaft 20 to start to rotate rapidly. Under the influence of centrifugal force, the first connecting rod 22 moves in a direction perpendicular to the first rotating shaft 20, so that the knocking ball 23 can touch the filter plate 10, thereby removing the mud stuck to the bottom of the filter plate 10. When the mud and sand at the bottom of the filter plate 10 falls off, the micro cylinder 15 is controlled to shorten so that the micro motor 19 and the first rotating shaft 20 are reset, and the pulling plate trolley body 13 can continue to be controlled to move.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction site mud centrifugal filter press device, comprising a first crossbeam (1), a second crossbeam (3) is fixed to one side of the first crossbeam (1), a plate pulling trolley (13) is arranged on the top of the second crossbeam (3), a filter plate (10) is movably mounted on one side of the second crossbeam (3), and support legs (2) are fixed to the bottoms of the first crossbeam (1) and the second crossbeam (3), characterized in that: A moving block (12) is fixed on one side of the pull plate trolley body (13), a micro motor (19) is movably mounted on the bottom of the moving block (12), a first rotating shaft (20) is fixed to the power output end of the micro motor (19), a first connecting rod (22) is movably mounted on the outer wall of the first rotating shaft (20), a knocking ball (23) is fixed to the bottom of the first connecting rod (22), an air pump (7) is fixed to the bottom of one side of the first cross beam (1), a first support rod (5) is fixed to the middle of one side of the first cross beam (1), a control panel (6) is fixed to one side of the first support rod (5), a telescopic cylinder (8) is fixed to the other side of the first support rod (5), a movable extrusion plate (9) is fixed to the power output end of the telescopic cylinder (8), and the movable extrusion plate (9) is fixed to the power output end of the telescopic cylinder (8). A second water guide pipe (33) is fixedly passed through the bottom of one side of the plate (9); a fixed extrusion plate (11) is fixedly disposed on one side of one end of the second cross beam (3); a second support rod (24) and a support seat (29) are fixedly disposed on the top of one end of the second cross beam (3); an outer shell (28) is fixedly disposed on the top of the support seat (29); a servo motor (25) is fixedly disposed on one end of the second support rod (24); a second rotating shaft (26) is fixedly disposed on the power output end of the servo motor (25); a second connecting rod (27) is fixedly disposed on the bottom of the second rotating shaft (26); a centrifugal cylinder (34) is fixedly disposed on the bottom of the second connecting rod (27); a filter cylinder (35) is rotatably connected to the inside of the centrifugal cylinder (34); and a sand guide pipe (31) is fixedly disposed on the bottom of the support seat (29).

2. A centrifugal filter press device for construction site mud according to claim 1, characterized in that: A sliding groove (4) is provided through one side of the second cross beam (3), a sliding block (14) is fixed in the middle of one side of the moving block (12), and the sliding block (14) is slidably connected to the moving block (12).

3. A centrifugal filter press device for construction site mud according to claim 1, characterized in that: A micro cylinder (15) is fixed in the middle of one side of the moving block (12), and a rack (18) is fixed at the power output end of the micro cylinder (15).

4. A centrifugal filter press device for construction site mud according to claim 3, characterized in that: A first hinge seat (16) is fixed at the bottom of the moving block (12); the top of the micro motor (19) is rotatably connected to the bottom of the first hinge seat (16); a gear (17) is fixed to one side of the connection between the micro motor (19) and the first hinge seat (16); the gear (17) and the rack (18) are meshed with each other; the number of teeth of the rack (18) is equal to one quarter of the number of teeth of the gear (17).

5. A centrifugal filter press device for construction site mud according to claim 4, characterized in that: A second hinge seat (21) is fixed to the outer wall of the first rotating shaft (20), the top of the first connecting rod (22) is rotatably connected to the second hinge seat (21), a plurality of second hinge seats (21) are provided, and the plurality of second hinge seats (21) are arranged equidistantly and filled on the outer wall of the first rotating shaft (20), the knocking ball (23) is hollow, the length of the first rotating shaft (20) is equal to the length of the first crossbeam (1), and the bottom of the first hinge seat (16) is located on the same horizontal plane as the middle of the filter plate (10).

6. A centrifugal filter press device for construction site mud according to claim 1, characterized in that: The outer walls of the centrifugal cylinder (34) and the filter cylinder (35) are both penetrated with filter holes (36), and a plurality of filter holes (36) are provided. The filter holes (36) on the outer wall of the centrifugal cylinder (34) and the filter holes (36) on the outer wall of the filter cylinder (35) are arranged in a one-to-one correspondence.

7. A centrifugal filter press device for construction site mud according to claim 6, characterized in that: A slot (39) is provided on one side of the top of the centrifugal cylinder (34), and a plurality of the slots (39) are provided. The plurality of slots (39) are arranged equidistantly in an arc shape, and the spacing between the two slots (39) at the two ends is equal to the diameter of the filter mesh hole (36).

8. A centrifugal filter press device for construction site mud according to claim 7, characterized in that: A clamping block (38) is fixed on the top of the filter cartridge (35), the clamping block (38) and the clamping groove (39) are mutually clamped, and the filter cartridge (35) is in the shape of a hollow cylinder.

9. The centrifugal filter press device for construction site mud according to claim 1, characterized in that: The central axis of the centrifugal cylinder (34), the central axis of the filter cylinder (35) and the central axis of the outer shell (28) are arranged in a colinear manner, and a feed trough (37) is provided through the middle of the bottom of the centrifugal cylinder (34) and the outer shell (28), the bottom of the feed trough (37) is sealedly connected to the top of the sand guide tube (31), and the horizontal height value of the centrifugal cylinder (34) close to the feed trough (37) is smaller than the horizontal height value of the centrifugal cylinder (34) away from the feed trough (37).

10. The centrifugal filter press device for construction site mud according to claim 1, characterized in that: A first water guide pipe (30) is sealed and penetrated through one side of the outer wall of the outer shell (28), a regulating valve (32) is provided on the outer wall of the sand guide pipe (31), and the other end of the sand guide pipe (31) is connected to the fixed extrusion plate (11).

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