Secondary spreading trolley and multi-layer stacked solid-liquid separation system

Abstract

The invention relates to sludge drying equipment, in particular to a multi-layer stacked solid-liquid separation system and a secondary spreading trolley used in the multi-layer stacked solid-liquid separation system. The upper-layer trolley body structure of the secondary material spreading trolley is improved, the filter cloth push rod used for pushing the filter cloth is designed to be adjustable in vertical position, the distance between the upper-layer trolley body and the filter cloth below the upper-layer trolley body can be increased by lowering the position of the filter cloth push rod, parts needing to be adjusted for machine adjustment are obviously reduced, the machine adjustment difficulty is greatly reduced, and the production efficiency is improved. And the machine adjusting speed is obviously improved.

Description

Technical Field

[0001] The invention relates to a sludge drying device, in particular to a multi-layer stacked solid-liquid separation system and a secondary material spreading trolley used in the multi-layer stacked solid-liquid separation system. Background Art

[0002] Patent document CN221094005U records a high-pressure reciprocating automatic dewatering device for sludge (in patent document CN114917634A, this type of equipment is called a multi-layer stacked solid-liquid separation system, which is more appropriate, so this type of equipment is called a multi-layer stacked solid-liquid separation system in other places of this application document). See paragraph 0028 of the specification of patent document CN221094005U. Its two-level material laying trolley includes a bottom body and an upper body. When laying materials, the bottom body and the upper body move to the rear side of the high-pressure dewatering mechanism, and then the upper body moves back and forth relative to the bottom body, repeatedly entering and exiting the high-pressure dewatering mechanism to complete the laying of layers of sludge.

[0003] When the upper car body moves into the high-pressure dehydration mechanism, the front end of the upper car body pushes the filter cloth from the back to the front, so that the filter cloth forms a U-shaped wrap around the upper car body. When the upper car body moves out of the high-pressure dehydration mechanism, the sludge is spread on the filter cloth below. Different sludges are suitable for different sludges, but the sludge thickness is limited by the distance between the upper car body and the filter cloth below it. If the required sludge thickness exceeds the limit, the machine needs to be adjusted to change the distance between the upper car body and the filter cloth below it. At present, the machine needs to adjust many parts, which is time-consuming and laborious to operate. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new structure of a two-stage material spreading trolley to reduce the difficulty of machine adjustment and speed up the machine adjustment speed.

[0005] In order to solve the above technical problems, the present invention improves the upper body structure of the two-stage material laying trolley, and designs the filter cloth push rod used to push the filter cloth to be adjustable in up and down position. By lowering the position of the filter cloth push rod, the distance between the upper body and the filter cloth thereunder can be increased, the number of parts to be adjusted for machine adjustment is significantly reduced, the difficulty of machine adjustment is greatly reduced, and the speed of machine adjustment is significantly improved.

[0006] The two-level material spreading trolley provided by the present invention comprises a bottom car body and an upper car body arranged on the bottom car body, the upper car body is used for spreading the filter cloth in the process of moving forward and backward relative to the bottom car body, the front end of the upper car body is used for pushing the filter cloth, the upper car body comprises a car body main body, a filter cloth push rod and an adjusting mechanism, the filter cloth push rod is arranged on the front side of the car body main body and is used for pushing the filter cloth, the filter cloth push rod is connected to the car body main body through the adjusting mechanism, and the adjusting mechanism is used for adjusting the upper and lower positions of the filter cloth push rod relative to the car body main body, so that the height difference between the lowest point of the filter cloth push rod and the mud outlet point of the car body main body changes, so that the spacing between the upper car body and the filter cloth thereunder changes.

[0007] The filter cloth push rod can be of various structures and connected to the vehicle body through various adjustment mechanisms. For example, the filter cloth push rod is a horizontally placed hollow straight rod. The cross-section of the filter cloth push rod along the up and down directions is a triangular structure with stable structure and light weight. The filter cloth push rod comprises a rear wall, an upper wall and a lower wall. The rear wall is provided with a plurality of bayonet holes. A first clearance opening is provided on the upper wall of the filter cloth push rod corresponding to the bayonet hole, and a screw hole is provided on the front side of the vehicle body corresponding to the bayonet hole. The adjustment mechanism comprises a plurality of locking bolt assemblies. The locking bolt assembly comprises a first bolt and a first gasket. The first bolt passes through the first gasket and the bayonet hole in turn and is locked into the corresponding screw hole, so that the first gasket and the vehicle body clamp the rear wall of the filter cloth push rod, thereby fixing the filter cloth push rod relative to the vehicle body. When the first bolt passes through the bayonet hole at different positions along the up and down directions, the upper and lower positions of the filter cloth push rod relative to the vehicle body are different.

[0008] For another example, the filter cloth push rod is a "V"-shaped or "A"-shaped structure, including a rear wall and a lower wall, the front end of the lower wall is used to push the filter cloth, and a plurality of strip holes are arranged on the rear wall, and bolts pass through the strip holes to fix the filter cloth push rod to the front side of the vehicle body. For another example, the bolts pass through the rear wall of the filter cloth push rod and are locked into different positions distributed in the up-down direction on the vehicle body, so as to adjust the up-down position of the filter cloth push rod relative to the vehicle body.

[0009] When the first bolt for fixing the filter cloth push rod is directly screwed to the vehicle body, but the front side of the vehicle body is not thick enough, a convex block is provided on the front side of the vehicle body corresponding to the bayonet, and the screw hole is provided on the convex block. If the first bolt passes through the front side of the vehicle body and is connected to the nut located inside the vehicle body, it is not necessary to provide a convex block on the front side of the vehicle body.

[0010] On the basis of solving the above technical problems, the present invention also proposes to achieve the adaptation of the filter cloth push rod to filter cloths of different widths by flexibly setting widening accessories, the shape of the widening accessories matches the shape of the front end of the filter cloth push rod, and the widening accessories of corresponding sizes are selected according to the width of the filter cloth to be adapted and installed on the filter cloth push rod. For example, the connection between the upper wall and the lower wall of the filter cloth push rod is a round rod structure, and the upper body also includes at least one pair of widening accessories, the widening accessories include a hollow round rod and a fastening bolt assembly, and the fastening bolt assembly includes a second bolt and a second gasket; the second bolt passes through the second gasket and the round rod in turn, and is locked into the connection between the upper wall and the lower wall of the filter cloth push rod, so as to fix the round rod on the filter cloth push rod; the two round rods contained in the pair of widening accessories are respectively fixed at both ends of the filter cloth push rod, so that the upper body can adapt to filter cloths with wider widths.

[0011] The front end of the filter cloth push rod can be of various structures. To prevent the filter cloth push rod from scratching the filter cloth, the front end of the filter cloth push rod forms a convex curved surface for pushing the filter cloth. In the up and down direction, the lowest point of the curved surface is lower than the vehicle body.

[0012] The vehicle body is used to transport sludge, and each of its feed ends is respectively connected to each feed pipe of the multi-layered solid-liquid separation system for feeding the upper vehicle body, and each of its discharge ends discharges the sludge to the filter cloth below the upper vehicle body at the same time. The vehicle body can be of various structures, for example, the vehicle body includes a shell and a plurality of mud laying pipes arranged side by side in the shell, the filter cloth push rod is arranged at the front side of the shell, and the lower side of the front end of the shell is provided with a second clearance port corresponding to the mud laying pipe, and the mud laying pipe includes a round pipe section, a diameter-changing section and a flat pipe section arranged in sequence from back to front, the discharge end of the flat pipe section is bent downward and extends out of the shell from the second clearance port, and the feed end of the round pipe section extends out of the shell from the rear side of the shell to be connected with the feed pipe of the multi-layered solid-liquid separation system for feeding the upper vehicle body; a cleaning port is provided on the upper side of the flat pipe section, and an openable sealing cover is provided on the cleaning port cover. When the flat pipe section is blocked, the sealing cover is opened and flushed from the cleaning port with water until it is unblocked. In order to facilitate the unblocking of the flat pipe section, the area of ​​the cleaning port should not be too small.

[0013] The shell can be of various structures. For example, the shell includes a lower shell and an upper cover fixed to each other in a detachable manner. A plurality of drainage holes are provided on the lower side of the lower shell. When the flat pipe section is unblocked, the sludge flushed out is discharged from the vehicle body through the drainage holes.

[0014] The forward and backward movement of the bottom car body and the forward and backward movement of the upper car body relative to the bottom car body can be realized by various structures and mechanisms, for example, the structures and mechanisms described in patent document CN221094005U. For another example, the bottom car body is provided with a first optical axis guide rail and a first power mechanism, the power output end of the first power mechanism is connected to the upper car body to drive the upper car body to move forward and backward relative to the bottom car body, and the upper car body is provided with a first slider that cooperates with the first optical axis guide rail to achieve the guiding effect of the first optical axis guide rail on the forward and backward movement of the upper car body relative to the bottom car body; the secondary material paving trolley also includes a second optical axis guide rail and a second power mechanism, and the bottom car body is also provided with a second slider that cooperates with the second optical axis guide rail, and the power output end of the second power mechanism is connected to the bottom car body to drive the bottom car body to move forward and backward under the guidance of the second optical axis guide rail. The first power mechanism and the second power mechanism can be various power mechanisms, such as hydraulic cylinders. When laying mud, the upper vehicle body is positioned forward, and the optical axis sliding structure coordinated with the optical axis guide rail and the slider has a good adaptability to the eccentric load condition, which is beneficial to improving the smoothness of the forward and backward movement of the upper vehicle body and the bottom vehicle body.

[0015] The present invention also provides a multi-layer stacked solid-liquid separation system, including a high-pressure dehydration mechanism for dehydrating sludge, a filter cloth retracting and releasing mechanism for retracting and releasing filter cloth, a material spreading trolley for spreading mud on the filter cloth, a feeding pipe for feeding the material spreading trolley, a diverter for diverting sludge, a pump for pumping sludge in a silo into the diverter, and a silo for storing material. The material spreading trolley is a secondary material spreading trolley provided by the present invention.

[0016] The number of feed pipes corresponds to the number of feed ends of the secondary paving trolley, the number of feed ends of the diverter is one, and the number of discharge ends corresponds to the number of feed pipes. For example, the number of feed pipes is 2 n where n is a positive integer. The flow divider includes (n+1)-stage pipelines, the number of pipelines in the first stage is one, and the number of pipelines in the (n+1)th stage is two. n The number of pipelines at each level is twice that of the previous level, and the sludge in each pipeline is evenly divided into two pipelines of the next level connected to the pipeline.

[0017] The pump used to pump the sludge in the silo into the diverter can be various pumps, such as a plunger pump that can achieve precise flow control, and a screw pump described in patent document CN221094005U. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figures 1a to 1c They are three-dimensional views of the first and second level paving trolleys in three states according to the embodiment of the present invention; Figure 2 for Figure 1b A three-dimensional view of the secondary paving trolley from another perspective; Figure 3 for Figure 1a The disassembled view of the secondary paving trolley is shown; Figures 4 to 7 They are Figure 1a Disassembly diagrams of the upper car body in different disassembly states are shown; Figure 8 for Figure 7 A three-dimensional view of the mud-laying pipe after removing the sealing cover; Figures 9a to 9c The working process of the first and second level paving trolley in the embodiment of the present invention is shown; Fig.10 This is a disassembly diagram of the multi-layer stacked solid-liquid separation system of Example 2 of the present invention. DETAILED DESCRIPTION Embodiment 1

[0019] See also Figure 3 A two-stage material paving trolley includes an upper car body 1 and a bottom car body 2. A pair of first optical axis guide rails 21 and a pair of first hydraulic cylinders 22 are provided on the upper side of the bottom car body 2. The power output end 221 of the first hydraulic cylinder 22 is connected to the upper car body 1 to drive the upper car body 1 to move forward and backward relative to the bottom car body 2. The upper car body 1 is provided with a first slider 11 that cooperates with the first optical axis guide rail 21. The first slider 11 is sleeved on the first optical axis guide rail 21, so that the first optical axis guide rail 21 guides the forward and backward movement of the upper car body 1 relative to the bottom car body 2. The two-stage material paving trolley also includes a pair of second optical axis guide rails 31 and a pair of second hydraulic cylinders 32. The second optical axis guide rails 31 and the second hydraulic cylinders 32 are respectively installed on other devices of the multi-layer stacked solid-liquid separation system through brackets 311 and 321. The bottom vehicle body 2 is provided with a second slider 23 that cooperates with the second optical axis guide rail 31. Two second sliders 23 are sleeved on the second optical axis guide rail 31 to realize the second optical axis guide rail 31 to guide the bottom vehicle 2 to move forward and backward relative to the bracket 311. The power output end 321 of the second hydraulic cylinder 32 is connected to the bottom vehicle body 2 to drive the bottom vehicle body 2 to move forward and backward under the guidance of the second optical axis guide rail 31.

[0020] When laying mud, the position of the bottom body 2 is as shown in Figure 1b and 1c , remains unchanged, the upper body 1 is Figure 1b and 1c After the sludge is dried, when discharging, the positions of the upper car body 1 and the bottom car body 2 refer to Figure 1a .

[0021] See also Figure 4The upper body 1 includes a body main body and a filter cloth push rod 12, and the filter cloth push rod 12 is connected to the body main body through an adjustment mechanism. The filter cloth push rod 12 is a horizontally placed hollow straight rod, and the cross section of the filter cloth push rod 12 along the up and down direction is a triangular structure; the filter cloth push rod 12 includes a rear wall, an upper wall and a lower wall, and the rear wall is provided with a plurality of bayonet holes 121, and the upper wall of the filter cloth push rod 12 is provided with a first clearance opening (leaving an operating space for tightening the first bolt) corresponding to the bayonet hole 121, and the front side of the body main body is provided with a protrusion 13 corresponding to the bayonet hole 121, and the protrusion 13 is provided with a screw hole, and the adjustment mechanism includes a plurality of locking bolt assemblies 14, and the locking bolt assembly 14 includes a first bolt and a first gasket, and the first bolt passes through the first gasket and the bayonet hole 121 in sequence, and is locked into the corresponding screw hole, so that the first gasket and the body main body clamp the rear wall of the filter cloth push rod 12, and the filter cloth push rod 12 is fixed relative to the body main body. When the first bolt passes through different positions of the bayonet 121 in the vertical direction, the filter cloth push rod 12 is at different vertical positions relative to the vehicle body. When the thickness of the mud layer changes, just loosen the first bolt slightly, adjust the position of the filter cloth push rod 12 upward / downward, and then tighten the first bolt.

[0022] See also Figures 6 to 8 The vehicle body includes a shell and a plurality of mud-laying pipes 15 arranged side by side in the shell. The filter cloth push rod 12 is arranged at the front side of the shell, and a second clearance opening E is arranged at the lower side of the front end of the shell corresponding to the mud-laying pipe 15 (see Figure 2 ), the mud laying pipe 15 includes a round pipe section 15A, a reducing section 15B and a flat pipe section 15C arranged in sequence from back to front, the discharge end of the flat pipe section 15C is bent downward and extends out of the outer shell from the second make way port E, and the feed end of the round pipe section 15A extends out of the outer shell from the rear side of the outer shell to be connected with a feed pipe of a multi-layer stacked solid-liquid separation system for feeding materials to the upper vehicle body 1.

[0023] The flat pipe section 15C is relatively easy to be blocked. To facilitate unblocking the flat pipe section 15C, a cleaning port 151 is provided on the upper side of the flat pipe section 15C. An openable sealing cover 152 is provided on the upper cover of the cleaning port 151. The housing includes a lower shell 16 and an upper cover body fixed to each other in a detachable manner. The upper cover body includes a rear cover body 18 and a front cover body 17 corresponding to the cleaning port 151. A plurality of drainage holes 161 are provided on the lower side of the lower shell 16. When the flat pipe section 15C needs to be unblocked, the upper car body 1 and the lower car body 2 are moved to Figure 1c Position, from the front of the high-pressure dehydration mechanism of the multi-layer stacked solid-liquid separation system, facing the high-pressure dehydration mechanism, open the front cover 17 and the sealing cover 152, clean and rinse the flat pipe section 15C from the cleaning port 151, and the sludge discharged from the cleaning port 151 is discharged from the upper vehicle body 1 through the drain hole 161.

[0024] See also Figures 9a to 9c When the upper vehicle body 1 moves forward and backward to spread mud, the multi-layered solid-liquid separation system block A first presses the filter cloth ( Figure 9a), and then the upper body 1 moves forward, pushing the filter cloth forward, so that the filter cloth forms a U-shaped wrap around the upper body 1 ( Figure 9b ), and then the multi-layer stacked solid-liquid separation system block B presses the filter cloth ( Fig.9c ) (the filter cloth push rod 12 is provided with a structure for giving way to the pressure block B), the upper body 1 moves backward while spreading mud. In order to reduce the scratching of the filter cloth, the front end of the filter cloth push rod 12 forms a convex arc surface P for pushing the filter cloth. In the vertical direction, the lowest point of the arc surface P is lower than the main body of the body, so that there is enough distance between the discharge port of the mud spreading pipe 15 and the filter cloth.

[0025] See also Figure 5 The connection between the upper wall and the lower wall of the filter cloth push rod 12 is a round rod structure, and a widening accessory 122 is installed at each end to adapt to a wider filter cloth. The widening accessory 122 includes a hollow round rod 1221 and a fastening bolt assembly 1222, and the fastening bolt assembly 1222 includes a second bolt and a second gasket. The second bolt passes through the second gasket and the round rod 1221 in sequence, and is locked into the connection between the upper wall and the lower wall of the filter cloth push rod 12, so as to fix the round rod 1221 on the filter cloth push rod 12.

[0026] This embodiment solves the following technical problems: 1. The filter cloth push rod is designed to be adjustable up and down, which solves the problem of high difficulty in adjusting the machine when the mud thickness changes; 2. The problem of adapting filter cloths of different widths is solved by installing widening accessories on the upper body in a detachable manner; 3. By setting a cleaning port and an openable sealing cover on the flat pipe section of the mud paving pipe, the problem of difficulty in unclogging the flat pipe section after blockage is solved; 4. The optical axis sliding structure coordinated with the optical axis guide rail and the slider guides the forward and backward movement of the bottom car body and the forward and backward movement of the upper car body relative to the bottom car body. The optical axis sliding structure has a good adaptability to the eccentric load condition, which improves the smoothness of the forward and backward movement of the upper car body and the bottom car body. Embodiment 2

[0027] A multi-layered solid-liquid separation system includes a high-pressure dehydration mechanism for dehydrating sludge, a filter cloth retracting and releasing mechanism for retracting and releasing filter cloth, a spreading trolley for spreading mud on the filter cloth, a feeding pipe for feeding the spreading trolley, a diverter for diverting sludge, a pump for pumping sludge in a silo into the diverter, and a silo for storing material.

[0028] The differences between this multi-layer stacked solid-liquid separation system and the equipment recorded in patent document CN221094005U are as follows: the material spreading trolley is the two-stage material spreading trolley provided in Example 1 of the present invention; the pump used to pump the sludge in the silo into the diverter is a plunger pump; the diverter includes three-level pipelines, the number of pipelines in the first level is one, the number of pipelines in the second level is two, and the number of pipelines in the third level is four, and the sludge in each pipeline is evenly divided into the two pipelines connected to the next level.

[0029] See also Fig.10 The sludge in the silo 100 is pumped into the single pipeline of the first stage of the diverter 200 by the plunger pump 300. The diverter 200 divides the single sludge into four pipelines, and the four sludges enter the four mud laying pipes 15 from the four feeding pipes 400 respectively. The four feeding pipes 400 are hoses, and the feeding pipes 400 are prevented from shaking by installing tank chains. Two feeding pipes 400 are inserted in each tank chain, and the two ends of the tank chain are respectively fixed on the upper vehicle body 1 and the diverter 200.

[0030] In addition to the technical problems solved by the embodiment, this embodiment also solves the following technical problems: 5. By designing the diverter into a multi-stage (more than two stages) structure, the uniformity of sludge distribution to each mud pipe is improved; 6. By using a plunger pump to pump the sludge in the silo into the diverter, precise control of the sludge flow is achieved.

[0031] Those skilled in the art may improve the existing multi-layer stacked solid-liquid separation system as needed to solve one or more of the above-mentioned technical problems 1 to 6.

Claims

1. A two-stage material spreading trolley, used in a multi-layer stacked solid-liquid separation system, the two-stage material spreading trolley comprising a bottom car body (2) and an upper car body (1) arranged on the bottom car body, the upper car body being used to spread material on a filter cloth in the process of moving forward and backward relative to the bottom car body, and the front end of the upper car body being used to push the filter cloth, characterized in that: The upper vehicle body comprises a vehicle body main body, a filter cloth push rod (12) and an adjustment mechanism. The filter cloth push rod is arranged at the front side of the vehicle body main body and is used to push the filter cloth. The filter cloth push rod is connected to the vehicle body main body via the adjustment mechanism. The adjustment mechanism is used to adjust the upper and lower positions of the filter cloth push rod relative to the vehicle body main body.

2. The two-stage paving trolley according to claim 1, characterized in that: The filter cloth push rod is a horizontally placed hollow straight rod, and the cross section of the filter cloth push rod along the up-down direction is a triangular structure; the filter cloth push rod comprises a rear wall, an upper wall and a lower wall, the rear wall is provided with a plurality of bayonet holes (121), the upper wall of the filter cloth push rod is provided with a first clearance opening corresponding to the bayonet hole, the front side of the vehicle body is provided with a screw hole corresponding to the bayonet hole, the adjustment mechanism comprises a plurality of locking bolt assemblies (14), the locking bolt assemblies comprise a first bolt and a first gasket, the first bolt passes through the first gasket and the bayonet hole in sequence, and is locked into the corresponding screw hole, so that the first gasket and the vehicle body clamp the rear wall of the filter cloth push rod, thereby fixing the filter cloth push rod relative to the vehicle body; when the first bolt passes through different positions of the bayonet hole along the up-down direction, the up-down position of the filter cloth push rod relative to the vehicle body is different.

3. The two-stage paving trolley according to claim 2, characterized in that: A convex block (13) is provided on the front side of the vehicle body corresponding to the bayonet, and a screw hole is provided on the convex block.

4. The two-stage paving trolley according to claim 2, characterized in that: The connection between the upper wall and the lower wall of the filter cloth push rod is a round rod structure, and the upper body also includes at least one pair of widening accessories (122), the widening accessories include a hollow round rod (1221) and a fastening bolt assembly (1222), and the fastening bolt assembly includes a second bolt and a second gasket; the second bolt passes through the second gasket and the round rod in sequence, and is locked into the connection between the upper wall and the lower wall of the filter cloth push rod, so as to fix the round rod on the filter cloth push rod; the two round rods contained in the pair of widening accessories are respectively fixed at both ends of the filter cloth push rod, so that the upper body can adapt to filter cloth with a wider width.

5. The two-stage paving trolley according to claim 1, characterized in that: The front end of the filter cloth push rod forms a convex arc surface (P) for pushing the filter cloth. In the up and down direction, the lowest point of the arc surface is lower than the main body of the vehicle.

6. The two-stage paving trolley according to any one of claims 1 to 5, characterized in that: The vehicle body comprises an outer shell and a plurality of mud-laying pipes (15) arranged side by side in the outer shell, the filter cloth push rod is arranged at the front side of the outer shell, the lower side of the front end of the outer shell is provided with a second clearance opening (E) corresponding to the mud-laying pipe, the mud-laying pipe comprises a round pipe section (15A), a diameter-changing section (15B) and a flat pipe section (15C) arranged in sequence from back to front, the discharge end of the flat pipe section is bent downward and extends out of the outer shell from the second clearance opening, the feed end of the round pipe section extends out of the outer shell from the rear side to be connected with a feed pipe (400) of a multi-layer stacked solid-liquid separation system for feeding the upper vehicle body; a cleaning opening (151) is provided on the upper side of the flat pipe section, and an openable sealing cover (152) is provided on the upper cover of the cleaning opening.

7. The two-stage paving trolley according to claim 6, characterized in that: The outer shell comprises a lower shell (16) and an upper cover body which are fixed to each other in a detachable manner, and a plurality of drainage holes (161) are provided on the lower side of the lower shell.

8. The secondary paving trolley according to any one of claims 1 to 7, characterized in that: The bottom car body is provided with a first optical axis guide rail (21) and a first power mechanism (22); the power output end of the first power mechanism is connected to the upper car body to drive the upper car body to move forward and backward relative to the bottom car body; the upper car body is provided with a first sliding block (11) that cooperates with the first optical axis guide rail to achieve the guiding effect of the first optical axis guide rail on the forward and backward movement of the upper car body relative to the bottom car body; the secondary material laying trolley also includes a second optical axis guide rail (31) and a second power mechanism (32); the bottom car body is also provided with a second sliding block (23) that cooperates with the second optical axis guide rail; the power output end of the second power mechanism is connected to the bottom car body to drive the bottom car body to move forward and backward under the guidance of the second optical axis guide rail.

9. A multi-layer stacked solid-liquid separation system, comprising a high-pressure dehydration mechanism for dehydrating sludge, a filter cloth retracting and releasing mechanism for retracting and releasing filter cloth, a spreading trolley for spreading sludge on the filter cloth, a feeding pipe (400) for feeding the spreading trolley, a diverter (200) for diverting sludge, a pump (300) for pumping sludge in a silo into the diverter, and a silo (100) for storing material, characterized in that: The material paving trolley is a secondary material paving trolley as described in any one of claims 1 to 8.

10. The multi-layer stacked solid-liquid separation system according to claim 9, characterized in that: The number of feed pipes is 2 n where n is a positive integer. The flow divider includes (n+1)-stage pipelines, the number of pipelines in the first stage is one, and the number of pipelines in the (n+1)th stage is two. n The number of pipelines at each level is twice that of the previous level, and the sludge in each pipeline is evenly divided into two pipelines of the next level connected to the pipeline.

11. The multi-layer stacked solid-liquid separation system according to claim 9, characterized in that: The pump used to pump the sludge in the silo into the diverter is a plunger pump.

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