An automatic sludge feeding device

Abstract

The present invention provides an automatic sludge feeding device. The box body is hollow and open at both the top and bottom. On both sides of the box body, there are respectively first cylinders for lifting movement. At the upper part of the box body, there are a first connecting rod, a second connecting rod and a second cylinder for horizontal movement. A number of mud knives are provided on the first connecting rod, and the first connecting rod is connected to the cylinder body of the second cylinder. The piston rod of the first cylinder is connected to the first connecting rod to drive the mud knives on the first connecting rod and the cylinder body of the second cylinder to move vertically up and down. At least one rake is provided on the second connecting rod. The piston rod of the second cylinder is connected to the second connecting rod to drive the rake on the second connecting rod to move horizontally. A molding machine is provided below the box body. The present invention further provides a treatment method for sludge feeding. The automatic sludge feeding device provided by the present invention can break sludge and solve the problem of sludge bridging, and at the same time can make the sludge evenly distributed.

Description

Technical Field

[0001] The present invention belongs to the field of environmental protection technology, and relates to an automatic sludge feeding device, specifically an automatic sludge feeding device for sludge drying equipment. Background Art

[0002] The sludge forming machine in the sludge drying equipment is an important treatment device for sludge drying. Usually, above the sludge forming machine is a pressing plate bridge breaker. When the water content of the sludge is between 70% and 80%, the sludge can smoothly enter the sludge forming machine and be extruded into noodle-shaped sludge and enter the sludge drying mesh belt below the forming machine. However, when the water content of the sludge is between 60% and 70%, the pressing plate bridge breaker cannot smoothly press all the sludge into the sludge forming machine. Due to the low water content of the sludge, the sludge is easily air-dried into small hard lumps. The small hard lumps roll above the forming machine and become mud eggs. The mud eggs do not enter the forming machine and block the subsequent sludge from entering the forming machine, resulting in uneven distribution of sludge on the mesh belt below the forming machine and a significant reduction in the sludge drying efficiency. Therefore, it is necessary to improve the feeding device between the pressing plate bridge breaker and the sludge forming machine. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide an automatic sludge feeding device, which can break the sludge and solve the problem of sludge bridging, and at the same time ensure that the sludge distribution is always uniform during the sludge feeding process.

[0004] To achieve the above object and other related objects, the first aspect of the present invention provides an automatic sludge feeding device, including a box body. The box body is hollow and has upper and lower openings. On both sides of the box body, there are respectively first cylinders for lifting movement. At the upper part of the box body, there are a first connecting rod, a second connecting rod and a second cylinder for horizontal movement. A plurality of mud knives are provided on the first connecting rod, and the first connecting rod is connected to the cylinder body of the second cylinder. The piston rod of the first cylinder is connected to the first connecting rod to drive the mud knives on the first connecting rod and the cylinder body of the second cylinder to move vertically up and down. At least one rake is provided on the second connecting rod. The piston rod of the second cylinder is connected to the second connecting rod to drive the rake on the second connecting rod to move horizontally. A forming machine is provided below the box body.

[0005] Preferably, a base is provided at the bottom of the box body and the first cylinder.

[0006] Preferably, the first cylinder is externally connected with a first solenoid valve for starting or closing the first cylinder by the first solenoid valve.

[0007] Preferably, at least a horizontal movement area for the rake is reserved above at least part of the mud knives.

[0008] Preferably, the thickness of the mud knife gradually increases from top to bottom.

[0009] Preferably, the number of the putty knives is 2 - 4.

[0010] More preferably, the several putty knives are arranged in parallel, and the top of the middle putty knife is lower than the bottom of the rake to form a horizontal movement area for the rake.

[0011] Preferably, a mesh belt is provided below the forming machine.

[0012] Preferably, the first connecting rod includes a first main rod, several first connecting rods and several support rods. The two ends of the first main rod are respectively connected to the piston rods of the first cylinders located on both sides of the box body. The support rods are connected to the first main rod and include multiple branches perpendicular to the first main rod. The lower ends of all or part of the branches are connected to the putty knives; one end of the first connecting rod is connected to the first main rod, and the other end of the first connecting rod is connected to the cylinder body of the second cylinder.

[0013] More preferably, the branches of the same support rod are connected by one or more transverse support rods.

[0014] Preferably, a plurality of fixed tracks are provided on the outer side wall of the box body. A moving shaft is slidably sleeved up and down in the fixed track, and the moving shaft is connected to the cylinder body of the second cylinder to limit the up and down movement track of the cylinder body of the second cylinder.

[0015] Preferably, the second connecting rod includes a second main rod and at least one second connecting rod. The two ends of the second main rod are respectively connected to the piston rods of the second cylinders, one end of the second connecting rod is connected to the second main rod, and the other end of the second connecting rod is connected to the rake.

[0016] Preferably, the rake includes a rake rod and a plurality of rake teeth. The top of the rake rod is connected to the second connecting rod, the bottom of the rake rod is connected to one end of the rake teeth, and a distance is maintained between adjacent rake teeth.

[0017] Preferably, the second cylinder is externally connected with a second solenoid valve for starting or closing the second cylinder by the second solenoid valve.

[0018] In the second aspect of the present invention, a sludge feeding treatment method is provided. Using the above automatic sludge feeding device, it includes the following steps:

[0019] 1) In the sludge container, use the putty knife to reciprocate up and down to break the sludge and prevent the sludge from bridging;

[0020] 2) At the same time, make the rake reciprocate horizontally while reciprocating up and down to make the sludge evenly distributed;

[0021] 3) The treated sludge falls into the forming machine to form sludge noodles.

[0022] Preferably, in step 1), the sludge is input into the box body, and the first cylinder is started to perform a lifting motion, thereby driving the mud knife on the first connecting rod to reciprocate up and down.

[0023] More preferably, the first cylinder is started to supply air by the first solenoid valve to perform a lifting motion.

[0024] Preferably, in step 1), a plurality of mud knives arranged in parallel reciprocate up and down.

[0025] Preferably, in step 2), the second cylinder is started to perform a horizontal motion at the same time, thereby driving the harrow on the second connecting rod to perform a horizontal reciprocating motion while reciprocating up and down.

[0026] More preferably, the second cylinder is started to supply air by the second solenoid valve to perform a horizontal motion.

[0027] Preferably, in step 2), the harrow performs a horizontal reciprocating motion above some of the mud knives.

[0028] As described above, an automatic sludge feeding device provided by the present invention has the following beneficial effects:

[0029] (1) An automatic sludge feeding device provided by the present invention can break the sludge and solve the problem of sludge bridging through the up and down movement of the mud knife.

[0030] (2) An automatic sludge feeding device provided by the present invention can make the sludge distribution uniform through the horizontal movement of the harrow.

[0031] (3) An automatic sludge feeding device provided by the present invention is ingeniously designed, has a simple structure, is convenient to use, has a low cost, and is very worthy of popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It shows a schematic diagram of the internal structure of an automatic sludge feeding device in the present invention.

[0033] Figure 2 It shows a schematic diagram of the structures of the first cylinder and the second cylinder in an automatic sludge feeding device in the present invention.

[0034] Figure 3 It shows a schematic diagram of the internal three-dimensional structure of an automatic sludge feeding device in the present invention.

[0035] Figure 4 It shows a schematic diagram of the main structure of an automatic sludge feeding device in the present invention.

[0036] Figure 5 It shows a schematic diagram of the external three-dimensional view of an automatic sludge feeding device in the present invention.

[0037] Reference Numerals

[0038] 1 Box Body

[0039] 2 First Cylinder

[0040] 3 Second Cylinder

[0041] 4 First Connecting Rod

[0042] 41 First Main Rod

[0043] 42 Support Rod

[0044] 43 Branch

[0045] 44 Transverse Support Rod

[0046] 45 First Connecting Bar

[0047] 5 Second Connecting Rod

[0048] 51 Second Main Rod

[0049] 52 Second Connecting Bar

[0050] 6 Trowel

[0051] 7 Rake

[0052] 71 Rake Rod

[0053] 72 Rake Teeth

[0054] 8 Molding Machine

[0055] 9 Base

[0056] 10 Fixed Track

[0057] 11 Moving Shaft

[0058] 12 Mesh Belt Detailed Implementation Manner

[0059] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0060] Please refer to Figures 1 to 5It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0061] The first aspect of the present invention provides an automatic sludge feeding device, as Figures 1 - 5 shown, which includes a box body 1. The box body 1 is hollow and open at both the top and bottom. On both sides of the box body 1, there are respectively first cylinders 2 for lifting movement. At the upper part of the box body 1, there are a first connecting rod 4, a second connecting rod 5 and a second cylinder 3 for horizontal movement. A number of mud knives 6 are provided on the first connecting rod 4, and the first connecting rod 4 is connected to the cylinder body of the second cylinder 3. The piston rod of the first cylinder 2 is connected to the first connecting rod 4 to drive the mud knives 6 on the first connecting rod 4 and the cylinder body of the second cylinder 3 to move vertically up and down. At least one rake 7 is provided on the second connecting rod 5. The piston rod of the second cylinder 3 is connected to the second connecting rod 5 to drive the rake 7 on the second connecting rod 5 to move horizontally. A molding machine 8 is provided below the box body 1.

[0062] In the automatic sludge feeding device provided by the present invention, as Figures 4 - 5 shown, a base 9 is provided at the bottom of the box body 1 and the first cylinder 2. The base 9 can connect and effectively and stably place the box body 1 and the first cylinder 2.

[0063] In the automatic sludge feeding device provided by the present invention, the first cylinder 2 is a piston-type cylinder commonly used.

[0064] In a specific embodiment, the first cylinder 2 is externally connected with a first solenoid valve for starting or closing the first cylinder 2 by the first solenoid valve. The first solenoid valve is a solenoid valve commonly used.

[0065] In the automatic sludge feeding device provided by the present invention, as Figure 1 、 3 shown, at least part of the mud knives 6 has a horizontal movement area for the rake reserved above.

[0066] In the automatic sludge feeding device provided by the present invention, as Figure 1As shown, the thickness of the putty knife 6 gradually increases from top to bottom. The knife head of the putty knife 6 is close to the forming machine 8 below the box body 1.

[0067] In the automatic sludge feeding device provided by the present invention, the putty knife 6 is made of stainless steel.

[0068] In the automatic sludge feeding device provided by the present invention, the number of the putty knives 6 is 2 - 4. In a preferred embodiment, the number of the putty knives 6 is 3.

[0069] In a preferred embodiment, as Figure 1 、 3 shown, the several putty knives 6 are arranged in parallel, and the top of the middle putty knife 6 is lower than the bottom of the rake 7 to form a horizontal movement area of the rake.

[0070] The putty knives 6 located on both sides inside the box body 1 can prevent sludge bridging. The putty knives 6 located in the middle of the box body 1 precisely cut and press the sludge up and down against the central layer of the forming machine 8, and can cut and press the small hard sludge lumps rolling above the forming machine 8 into the forming machine 8. The above-mentioned sludge bridging means that the sludge has high viscosity and often adheres to the box body 1, causing sludge bridging, and the bridged sludge does not enter the forming machine 8.

[0071] In the automatic sludge feeding device provided by the present invention, the forming machine 8 is a commonly used sludge forming machine and can be obtained by purchasing from the market. The working mechanism of the forming machine 8 is similar to that of a noodle making machine and can form sludge noodles.

[0072] In a specific embodiment, as Figure 1 shown, a mesh belt 12 is provided below the forming machine 8. The mesh belt 12 can ensure the uniform distribution of the sludge noodles. The mesh belt 12 is square. The size of the mesh belt 12 is 7 - 9m * 7 - 9m, preferably 8m * 8m. The mesh belt 12 is made of nylon.

[0073] In the automatic sludge feeding device provided by the present invention, as Figure 1 、 3 shown, the first connecting rod 4 includes a first main rod 41, several first connecting rods 45 and several support rods 42. Both ends of the first main rod 41 are respectively connected to the piston rods of the first cylinders 2 located on both sides of the box body 1. The support rods 42 are connected to the first main rod 41 and include multiple branches 43 perpendicular to the first main rod 41. The lower ends of all or part of the branches 43 are connected to the putty knife 6; one end of the first connecting rod 45 is connected to the first main rod 41, and the other end of the first connecting rod 45 is connected to the cylinder body of the second cylinder 3. It effectively realizes the up and down movement of the first connecting rod 4 to drive the putty knife 6 and the second cylinder 3.

[0074] In a preferred embodiment, as Figure 3 shown, the branches 43 of the same support rod 42 are connected by one or more transverse support rods 44, effectively fixing the trowel 6.

[0075] In the automatic sludge feeding device provided by the present invention, as Figure 4 , 5 shown, a plurality of fixed rails 10 are provided on the outer side wall of the box body 1, a moving shaft 11 is slidably sleeved up and down in the fixed rail 10, and the moving shaft 11 is connected to the cylinder body of the second cylinder 3 to limit the up and down movement trajectory of the cylinder body of the second cylinder 3.

[0076] In a preferred embodiment, as Figure 5 shown, the fixed rail 10 is a hollow cylinder.

[0077] In a preferred embodiment, as Figure 4 , 5 shown, the number of the fixed rails 10 is two.

[0078] Since the piston rod of the second cylinder 3 rotates and swings 360 degrees, the movement freedom degree of the second cylinder 3 is large, and it cannot be guaranteed that the up and down movement can be realized for sure. Therefore, the structure of the fixed rail 10 and the moving shaft 11 limits the movement freedom degree of the second cylinder 3, making it only able to move up and down and unable to move forward, backward, left or right.

[0079] In the automatic sludge feeding device provided by the present invention, as Figure 1 shown, the second connecting rod 5 includes a second main rod 51 and at least one second connecting rod 52. The two ends of the second main rod 51 are respectively connected to the piston rod of the second cylinder 3. One end of the second connecting rod 52 is connected to the second main rod 51, and the other end of the second connecting rod 52 is connected to the rake 7. The second connecting rod 5 effectively drives the rake 7 to move horizontally.

[0080] In the automatic sludge feeding device provided by the present invention, as Figure 1 shown, the rake 7 includes a rake rod 71 and a plurality of rake teeth 72. The top of the rake rod 71 is connected to the second connecting rod 52, the bottom of the rake rod 71 is connected to one end of the rake teeth 72, and a gap is maintained between adjacent rake teeth 72.

[0081] The left and right horizontal movement of the rake 7 can ensure that the sludge is always evenly distributed during the sludge feeding process.

[0082] In the automatic sludge feeding device provided by the present invention, the second cylinder 3 is a piston type cylinder commonly used.

[0083] In a specific embodiment, a second solenoid valve is externally connected to the second cylinder 3 for starting or closing the second cylinder 3. The second solenoid valve is a solenoid valve commonly used.

[0084] The second aspect of the present invention provides a method for treating sludge feed. Using the above automatic sludge feeding device, it includes the following steps:

[0085] 1) In the sludge container, use a mud knife to reciprocate up and down to break the sludge and prevent the sludge from bridging;

[0086] 2) At the same time, make the rake reciprocate horizontally while reciprocating up and down to make the sludge distribution uniform;

[0087] 3) The treated sludge falls into the forming machine to form sludge noodles.

[0088] In a preferred embodiment, in step 1), the sludge is input into the box body, and the first cylinder is started to perform a lifting motion, thereby driving the mud knife on the first connecting rod to reciprocate up and down.

[0089] Specifically, the first cylinder is started to supply air by the first solenoid valve to perform a lifting motion.

[0090] In a preferred embodiment, in step 1), a plurality of mud knives arranged in parallel reciprocate up and down.

[0091] In a preferred embodiment, in step 2), the second cylinder is started to perform a horizontal motion at the same time, thereby driving the rake on the second connecting rod to reciprocate horizontally while reciprocating up and down.

[0092] Specifically, the second cylinder is started to supply air by the second solenoid valve to perform a horizontal motion.

[0093] In a preferred embodiment, in step 2), the rake reciprocates horizontally above some of the mud knives.

[0094] Embodiment 1

[0095] As shown in the present invention Figures 1 - 5 shown, an automatic sludge feeding device is provided. The sludge is input into the box body, and the first cylinder is started by the first solenoid valve to perform a lifting motion, thereby driving the 3 mud knives on the first connecting rod to move up and down. Among them, the 2 mud knives located on both sides can prevent the sludge from bridging, and the 1 mud knife located in the middle can cut and press the small hard mud lumps rolling into the forming machine.

[0096] Meanwhile, the second cylinder is activated by the second solenoid valve to perform horizontal movement, thereby driving the rake on the second connecting rod to move horizontally, ensuring that the sludge distribution remains uniform throughout the sludge feeding process. When the second cylinder performs horizontal movement, it performs lifting movement within the fixed track through the up-and-down sliding of the moving shaft connected to it under the drive of the first connecting rod connected to it.

[0097] The sludge after the above treatment falls into the forming machine below the box to manufacture sludge noodles, and the sludge noodles are evenly distributed on the mesh belt below the forming machine.

[0098] Comparative Example 1

[0099] The automatic sludge feeding device used in Example 1 is applied to an existing sludge drying equipment, and a comparison is made with the situation where the automatic sludge feeding device in Example 1 is not adopted. It can be found that the sludge drying equipment without the automatic sludge feeding device in Example 1 processes 600 kg of sludge per shift, while the sludge drying equipment with the automatic sludge feeding device in Example 1 can process up to 1000 kg of sludge per shift, and the processing efficiency is increased by 40%.

[0100] Meanwhile, the number of bridging occurrences of the sludge drying equipment without the automatic sludge feeding device in Example 1 is 10 times per shift, while the number of bridging occurrences of the sludge drying equipment with the automatic sludge feeding device in Example 1 is 0 times per shift. The number of bridging occurrences is greatly reduced, and the efficiency of avoiding bridging is increased by 100%.

[0101] In addition, the uniform distribution rate of sludge of the sludge drying equipment without the automatic sludge feeding device in Example 1 is 50% per shift, while the uniform distribution rate of sludge of the sludge drying equipment with the automatic sludge feeding device in Example 1 is 100% per shift, and the sludge distribution is more uniform.

[0102] In summary, an automatic sludge feeding device provided by the present invention can break sludge and solve the problem of sludge bridging, and at the same time can make the sludge distribution uniform. Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0103] The above embodiments are only illustrative of the principles and effects of the present invention and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A method for processing sludge feed, using an automatic sludge feeding device, comprising the following steps: 1) In the sludge container, use a trowel to move up and down to break up the sludge and prevent it from bridging; 2) At the same time, the spike rake makes horizontal reciprocating motion while moving up and down to evenly distribute the sludge; 3) The treated sludge falls into the forming machine to form sludge noodles; Also includes the following features: a) In step 1), sludge is fed into the box, and the first cylinder is activated to perform lifting motion, thereby driving the sludge cutter on the first connecting rod to reciprocate up and down; b) In step 1), a plurality of parallel trowels are used to reciprocate up and down; c) In step 2), the second cylinder is simultaneously activated to perform horizontal motion, thereby driving the rake on the second connecting rod to perform horizontal reciprocating motion while performing vertical reciprocating motion; d) in step 2), the spike rake performs horizontal reciprocating motion on a portion of the trowel; The automatic sludge feeding device comprises a box body (1), the box body (1) is hollow and has upper and lower openings, and first cylinders (2) for performing lifting movements are respectively provided on both sides of the box body (1), and a first connecting rod (4), a second connecting rod (5) and a second cylinder (3) for performing horizontal movements are provided on the upper part of the box body (1); a plurality of mud knives (6) are provided on the first connecting rod (4), and the first connecting rod (4) is connected to the cylinder body of the second cylinder (3); the piston rod of the first cylinder (2) is connected to the first connecting rod (4) to drive the mud knives (6) on the first connecting rod (4) and the cylinder body of the second cylinder (3) to move vertically up and down; at least one nail rake (7) is provided on the second connecting rod (5), and the piston rod of the second cylinder (3) is connected to the second connecting rod (5) to drive the nail rake (7) on the second connecting rod (5) to move horizontally; a forming machine (8) is provided below the box body (1); The first connecting rod (4) includes a first main rod (41), a plurality of first connecting rods (45) and a plurality of supporting rods (42), the two ends of the first main rod (41) are respectively connected to the piston rods of the first cylinder (2) located on both sides of the box (1), the supporting rod (42) is connected to the first main rod (41) and includes a plurality of branches (43) perpendicular to the first main rod (41), and the lower ends of all or part of the branches (43) are connected to the trowel (6); one end of the first connecting rod (45) is connected to the first main rod (41), and the other end of the first connecting rod (45) is connected to the cylinder body of the second cylinder (3); The second connecting rod (5) includes a second main rod (51) and at least one second connecting rod (52), the two ends of the second main rod (51) are respectively connected to the piston rod of the second cylinder (3), one end of the second connecting rod (52) is connected to the second main rod (51), and the other end of the second connecting rod (52) is connected to the spike rake (7); The nail rake (7) includes a rake rod (71) and a plurality of rake teeth (72), the top of the rake rod (71) is connected to the second connecting rod (52), the bottom of the rake rod (71) is connected to one end of the rake teeth (72), and adjacent rake teeth (72) are spaced apart. A rake horizontal movement area is reserved above at least some of the trowels (6); the trowels (6) are arranged in parallel, and the top of the middle trowel (6) is lower than the bottom of the rake (7) to form a rake horizontal movement area.

2. An automatic sludge feeding device, characterized in that: The invention comprises a box body (1), wherein the box body (1) is hollow and has upper and lower openings, and a first cylinder (2) for performing lifting movement is respectively provided on both sides of the box body (1), and a first connecting rod (4), a second connecting rod (5) and a second cylinder (3) for performing horizontal movement are provided on the upper part of the box body (1); a plurality of mud knives (6) are provided on the first connecting rod (4), and the first connecting rod (4) is connected to the cylinder body of the second cylinder (3); the piston rod of the first cylinder (2) is connected to the first connecting rod (4) to drive the mud knives (6) on the first connecting rod (4) and the cylinder body of the second cylinder (3) to move vertically up and down; at least one nail rake (7) is provided on the second connecting rod (5), and the piston rod of the second cylinder (3) is connected to the second connecting rod (5) to drive the nail rake (7) on the second connecting rod (5) to move horizontally; a forming machine (8) is provided below the box body (1); The first connecting rod (4) includes a first main rod (41), a plurality of first connecting rods (45) and a plurality of supporting rods (42), the two ends of the first main rod (41) are respectively connected to the piston rods of the first cylinder (2) located on both sides of the box (1), the supporting rod (42) is connected to the first main rod (41) and includes a plurality of branches (43) perpendicular to the first main rod (41), and the lower ends of all or part of the branches (43) are connected to the trowel (6); one end of the first connecting rod (45) is connected to the first main rod (41), and the other end of the first connecting rod (45) is connected to the cylinder body of the second cylinder (3); The second connecting rod (5) includes a second main rod (51) and at least one second connecting rod (52), the two ends of the second main rod (51) are respectively connected to the piston rod of the second cylinder (3), one end of the second connecting rod (52) is connected to the second main rod (51), and the other end of the second connecting rod (52) is connected to the spike rake (7); The nail rake (7) includes a rake rod (71) and a plurality of rake teeth (72), the top of the rake rod (71) is connected to the second connecting rod (52), the bottom of the rake rod (71) is connected to one end of the rake teeth (72), and adjacent rake teeth (72) are spaced apart. A rake horizontal movement area is reserved above at least some of the trowels (6); the trowels (6) are arranged in parallel, and the top of the middle trowel (6) is lower than the bottom of the rake (7) to form a rake horizontal movement area.

3. The automatic sludge feeding device according to claim 2, characterized in that: Also includes one or more of the following characteristics: A) A base (9) is provided at the bottom of the box (1) and the first cylinder (2); B) the thickness of the trowel (6) gradually increases from top to bottom; C) A mesh belt (12) is provided below the forming machine (8).

4. The automatic sludge feeding device according to claim 2, characterized in that: The branches (43) of the same support rod (42) are connected via one or more transverse support rods (44).

5. The automatic sludge feeding device according to claim 2, characterized in that: A plurality of fixed rails (10) are provided on the outer wall of the box body (1), and a movable shaft (11) is slidably sleeved up and down in the fixed rails (10). The movable shaft (11) is connected to the cylinder body of the second cylinder (3) to limit the upward and downward movement trajectory of the cylinder body of the second cylinder (3).

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