Sludge granulator with cutting limiting guide rail

By using a sludge granulator with a limiting guide rail for cutting, and employing a filter die head and a shearing transmission mechanism, the problems of insufficient compactness and uneven granulation of sludge particles have been solved, thereby improving the uniformity of sludge particles and the processing quality.

CN224040849UActive Publication Date: 2026-03-27ANHUI JIESI NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-20
Publication Date
2026-03-27

AI Technical Summary

Technical Problem

The extrusion structure of existing sludge granulators results in insufficient compactness of sludge particles, which are prone to adhesion during shearing, leading to poor granulation effect. Furthermore, the inconsistent speed of the porous extrusion head results in particles of varying lengths.

Method used

The sludge granulator with a limiting guide rail cutter achieves passive filtration, initial clamping, and gradual pressurization of sludge through a filter die, linear transmission structure, and shearing transmission mechanism. Combined with the automatic shearing of the limiting guide plate and the cutting blade, it ensures that the sludge granules are of uniform length.

Benefits of technology

It improves the compactness and granulation quality of sludge particles, avoids clogging problems, and enhances the uniformity and processing quality of sludge particles.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of sludge granulators, and discloses a sludge granulator with a guide rail cutting limiting function, which comprises a base, an extruder body mounted at the top of the base, a feed hopper mounted at the top of the extruder body and used for feeding, and a filter die head and an extrusion die head arranged outside an output port of the extruder body. And the filtering die head is communicated with the space of the extrusion die head and is arranged between the extrusion die head and the output port of the extruder body. The cutting device with the limiting guide rail is composed of the shearing transmission mechanism, the limiting guide plate and the cutting knife, so that sludge strips extruded by the shaping perforated plate are automatically sheared by the shearing transmission mechanism in a transmission manner; the limiting block can rotate in a reciprocating mode along an annular limiting groove in the limiting guide plate to conduct shearing through guiding of the limiting guide plate to the limiting block and movable transmission of multiple positions of the shearing transmission mechanism, enough sludge output time is reserved, and it is guaranteed that the length of the pelletized sludge is uniform.
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Description

TECHNICAL FIELD

[0001] The utility model relates to sludge granulator technical field, concretely is a kind of sludge granulator with limiting guide rail cutting. BACKGROUND

[0002] At present, for how to use the sludge of water environment treatment and the sludge of sewage treatment in farmland, forest, vegetable, fruit etc. as organic fertilizer, the applicant finds that only the obtained sludge is fully reduced, and the organic matter nitrogen, phosphorus and potassium elements are supplemented to reach the content of organic fertilizer 17-17-17, the sludge is granulated, and the dehydration reduction is carried out, so that the fertilization method is the same as chemical fertilizer, and the demand can be met.

[0003] And in further research test, for sludge granulation technology, although corresponding granulator can be directly used in the prior art, from actual operation effect, single extrusion structure leads to insufficient compactness of sludge strip, and adhesion is prone to occur in shearing process, and the granulation effect is poor, and secondly, the hole speed of extrusion head in reality is not completely consistent, and the traditional linear reciprocating type cutter lacks sufficient buffer time, and the length of the particles generated by shearing is not uniform, therefore, aiming at the problems existing in the prior art, the present application provides a sludge granulator with limiting guide rail cutting to solve the problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a sludge granulator with limiting guide rail cutting, which solves the problems in the background art.

[0005] The utility model provides the following technical scheme: a sludge granulator with limiting guide rail cutting, including base, install extruder body in the top of base, the top of extruder body is equipped with feeding hopper for feeding, the output port outside extruder body is provided with filter die head, extrusion die head, and the space of filter die head and extrusion die head is communicated and is installed between extrusion die head and the output port of extruder body.

[0006] The inside of filter die head is sleeved with linear transmission structure, and the front and rear ends of linear transmission structure output structure are both sleeved with filter template, a plurality of first filter holes are arranged in the inside of two filter templates, and two filter templates can be respectively sleeved with filter die head and form filter space in the inside of filter die head under the synchronous transmission of linear transmission structure output structure.

[0007] The extrusion die is provided with a shaping porous plate arranged in the same plane with the open end face of the extrusion die, the inside of the shaping porous plate is provided with a plurality of second filter holes, and the top and one side of the extrusion die are respectively provided with a shearing transmission mechanism and two limiting guide plates, the two limiting guide plates are respectively arranged on the side surfaces of the front and rear ends of the extrusion die, the inside of each of the two limiting guide plates is provided with an annular limiting groove, and the output structure of the shearing transmission mechanism is connected with a cutting knife, the ends of the cutting knife are sleeved with the two annular limiting grooves and can rotate and shear from the surface of the shaping porous plate to the position away from the shaping porous plate under the transmission of the output structure of the shearing transmission mechanism.

[0008] The linear transmission mechanism comprises a filling template, a support frame and a first hydraulic cylinder, the output end of the first hydraulic cylinder is in transmission connection with the front end of the filling template as the output structure of the linear transmission mechanism, the filling template can be clamped with the filter die, the inside of the filter die is sleeved with a high-temperature-resistant sealing ring capable of being connected with the surface of the filling template, the connection and sealing effect of the filling template and the filter die is improved, and the support rod is arranged between the front end surface of the support frame and the surface of the shell of the first hydraulic cylinder.

[0009] The front and rear ends of the filling template are provided with T-shaped grooves, the inner wall of the middle part of the T-shaped groove is provided with a threaded hole, the two filter templates are sleeved in the two T-shaped grooves and are detachably installed through the threaded holes in the inner walls of the T-shaped grooves, so that the two filter templates have the use condition of reciprocating replacement, and the rotation use of the two filter templates can also be replaced without stopping when one of the filter templates is blocked.

[0010] The first filter holes are composed of first straight holes and reverse tapered holes communicated with the first straight holes, so as to filter and preliminarily extrude the sludge raw material to be extruded, and the first filter holes are arranged along the circumference of the filter die.

[0011] The second filter holes are composed of second straight holes and forward tapered holes communicated with the second straight holes, so as to gradually pressurize the extruded sludge and ensure the tightness of the subsequent strips, and the second filter holes are arranged along the circumference of the shaping porous plate.

[0012] The top and bottom of the annular limiting groove in the limiting guide plate are respectively provided with arc end guide sharp corners, and the side surfaces of the two limiting guide plates are respectively fixedly connected with the side surfaces of the front and rear ends of the extrusion die.

[0013] The shearing transmission mechanism comprises an auxiliary support plate and a second hydraulic cylinder, the bottom of the auxiliary support plate is mounted on the top surface of the extrusion die head, the shell surface of the top of the second hydraulic cylinder is sleeved with a first movable sleeve plate mounted on the top surface of the auxiliary support plate through a pin shaft, so that the second hydraulic cylinder can be automatically driven and has the use effect of active accommodation, a transmission joint is drivingly connected to the output end of the second hydraulic cylinder, and one end of the transmission joint is sleeved with a transition connecting block through a pin shaft.

[0014] The shell surface of the second hydraulic cylinder is connected with a tension spring, the tension spring is inclined, one end of the tension spring away from the second hydraulic cylinder is fixedly connected to the surface of the auxiliary support plate, and the tension spring provides a reset traction for the movable second hydraulic cylinder.

[0015] The cutting knife comprises a limiting block and a cutting knife body, the top and bottom of the limiting block are R-shaped corners, one side of the top of the cutting knife body is fixedly connected with one side of the limiting block, the other side of the cutting knife body can be attached to the surface of one side of the shaped porous plate, the two ends of the limiting block are movably sleeved in the interiors of two annular limiting grooves, and the surface of the other side of the limiting block is connected with the transition connecting block, so that the stability and reliability of subsequent reciprocating rotation along the annular limiting groove are ensured.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1、The utility model discloses a filter die head, linear transmission structure and two filter die plates are set up to form a multifunctional auxiliary output die head, which can passively filter and preliminarily clamp the sludge material output by the extruder body in the subsequent combination and use process, and the two filter die plates can be automatically alternately used in the filter die head under the transmission of the linear transmission structure without stopping the extruder body, avoiding blockage.

[0018] 2、The utility model discloses an extrusion die head and a shaped porous plate are set up to form a multifunctional extrusion die head, which gradually pressurizes the sludge filtered by the filter die plate through the plurality of conical hole structures in the shaped porous plate, ensuring the tightness of the subsequent sludge strips.

[0019] 3、The utility model discloses a shearing transmission mechanism, a limiting guide plate and a cutting knife are set up to form a cutting device with a limiting guide rail, which can automatically shear the sludge strips extruded by the shaped porous plate through the cutting knife driven by the shearing transmission mechanism, and the limiting guide plate and the shearing transmission mechanism can make the limiting block reciprocatingly rotate and shear along the annular limiting groove in the limiting guide plate, leaving enough time for sludge output, ensuring the uniform length of the granulated sludge, and improving the processing quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a front view schematic diagram of the structure of the utility model;

[0021] Figure 2 is a top view schematic diagram of the structure of the utility model;

[0022] Figure 3 is a partial enlarged schematic diagram of the linear transmission structure of the structure of the utility model;

[0023] Figure 4 is a partial sectional view schematic diagram of the linear transmission structure of the structure of the utility model;

[0024] Figure 5 is a sectional view schematic diagram of the shaping porous plate of the structure of the utility model;

[0025] Figure 6 is a left view schematic diagram of the shaping porous plate of the structure of the utility model;

[0026] Figure 7 is a right view schematic diagram of the shaping porous plate of the structure of the utility model;

[0027] Figure 8 is a left view schematic diagram of the filter template of the structure of the utility model;

[0028] Figure 9 is a right view schematic diagram of the filter template of the structure of the utility model.

[0029] In the drawing: 1, base; 2, extruder body; 3, feed hopper; 4, filter die head; 5, extrusion die head; 6, linear transmission structure; 61, filling template; 62, support frame; 63, first hydraulic cylinder; 7, filter template; 8, shaping porous plate; 9, shearing transmission mechanism; 91, auxiliary support plate; 92, second hydraulic cylinder; 93, first movable sleeve plate; 94, transmission joint; 95, tension spring; 10, limiting guide plate; 11, cutting knife; 111, limiting block; 112, cutting knife body. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] Please refer to Figures 1-5 , Figures 8-9The utility model provides a sludge granulator with limiting guide rail cutting, which comprises a base 1, an extruder body 2 installed on the top of the base 1, a feeding hopper 3 for feeding installed on the top of the extruder body 2, a filter die head 4 and an extrusion die head 5 arranged outside the output port of the extruder body 2, and the filter die head 4 is in communication with the space of the extrusion die head 5 and is installed between the extrusion die head 5 and the output port of the extruder body 2;

[0032] The inside of the filter die head 4 is sleeved with a linear transmission structure 6, the front and rear ends of the output structure of the linear transmission structure 6 are each sleeved with a filter die plate 7, the inside of each filter die plate 7 is provided with a plurality of first filter holes, each of the plurality of first filter holes is composed of a first straight hole and a reverse taper hole in communication with the first straight hole, thereby filtering and preliminarily extruding the sludge raw material to be extruded, and the plurality of first filter holes are arranged along the circumferential direction of the filter die plate 7, and the two filter die plates 7 can be respectively sleeved with the filter die head 4 and form a filtering space in the inside of the filter die head 4 under the synchronous transmission of the output structure of the linear transmission structure 6.

[0033] The linear transmission structure 6 comprises a filling die plate 61, a support frame 62 and a first hydraulic cylinder 63, the output end of the first hydraulic cylinder 63 is in transmission connection with the front end of the filling die plate 61 as the output structure of the linear transmission structure 6, and the filling die plate 61 can be clamped with the filter die head 4, the inside of the filter die head 4 is sleeved with a high-temperature-resistant sealing ring capable of being connected with the surface of the filling die plate 61, thereby improving the connection and sealing effect of the filling die plate 61 and the filter die head 4, the rear end of the support frame 62 is installed on the front end surface of the filter die head 4, and a support rod is installed between the front end surface of the support frame 62 and the surface of the shell of the first hydraulic cylinder 63.

[0034] The front and rear ends of the filling die plate 61 are each provided with a T-shaped groove, a threaded hole is formed in the inner wall of the middle part of the T-shaped groove, and the two filter die plates 7 are respectively sleeved in the two T-shaped grooves and detachably installed through the threaded holes in the inner walls of the T-shaped grooves, so that the two filter die plates 7 have the use condition of reciprocating replacement, and the rotation use of the two filter die plates 7 can also realize non-stop replacement when one of the filter die plates 7 is blocked.

[0035] In the specific implementation process,

[0036] The extruder body 2 has a large screw compression ratio, the raw material is output to the inside of the extruder body 2 through the feeding hopper 3, and then the sludge enters between the filter die head 4 and the extrusion die head 5 through the filter die plate 7 in the filter die head 4 under the action of the strong extrusion force of the large screw compression ratio of the extruder body 2, and the plurality of left small and right large reverse taper holes in the filter die plate 7 passively filter the sludge when the sludge passes through the filter die plate 7, thereby avoiding large particles from entering the next extrusion operation.

[0037] When the filter die 7 inside the filter die head 4 is used for a certain period of time, the first hydraulic cylinder 63 can be started synchronously in the open state of the extruder body 2, and the output end of the first hydraulic cylinder 63 drives the filling die 61 to move automatically inside the filter die head 4 until the front end of the filling die 61 replaces the position of the used filter die 7 with another unused filter die 7, and at the same time, the used filter die 7 is moved out of the inside of the filter die head 4 with the rear end structure of the filling die 61, then the screws installed between the used filter die 7 and the filling die 61 are disassembled and new filter dies 7 are installed, and the next round of use is ready.

[0038] Please refer to Figures 1-7 The extrusion die 5 is provided with a shaping porous plate 8 arranged in the same plane as the open end face of the extrusion die 5, and the inside of the shaping porous plate 8 is provided with a plurality of second filter holes, each of which is composed of a second straight hole and a conical hole connected to the second straight hole, so that the extruded sludge can be gradually pressurized to ensure the tightness of the subsequent slurry, and the plurality of second filter holes are arranged in sequence along the circumference of the shaping porous plate 8.

[0039] The top and one side of the extrusion die 5 are respectively provided with a shearing transmission mechanism 9 and two limiting guide plates 10, and the two limiting guide plates 10 are respectively arranged on the side surfaces of the front and rear ends of the extrusion die 5, and each of the two limiting guide plates 10 is provided with an annular limiting groove in the inside, and the output structure of the shearing transmission mechanism 9 is connected with a cutting knife 11, and the two ends of the cutting knife 11 are connected with the two annular limiting grooves and can rotate and shear from the surface of the shaping porous plate 8 to the position away from the shaping porous plate 8 under the transmission of the output structure of the shearing transmission mechanism 9.

[0040] The shearing transmission mechanism 9 comprises an auxiliary support plate 91 and a second hydraulic cylinder 92, the bottom of the auxiliary support plate 91 is installed on the top surface of the extrusion die 5, and the top surface of the shell of the second hydraulic cylinder 92 is connected with a first movable sleeve plate 93 installed on the top surface of the auxiliary support plate 91 through a pin shaft, so that the second hydraulic cylinder 92 can be automatically driven and have the effect of active displacement, the output end of the second hydraulic cylinder 92 is connected with a transmission joint 94, one end of the transmission joint 94 is connected with a transition connecting block through a pin shaft, the shell surface of the second hydraulic cylinder 92 is connected with a tension spring 95, the tension spring 95 is inclined, and one end of the tension spring 95 away from the second hydraulic cylinder 92 is fixedly connected to the surface of the auxiliary support plate 91, and the tension spring 95 provides a reset traction for the second hydraulic cylinder 92 in active operation.

[0041] The top and bottom of the two limiting guide plates 10 are provided with arc end guide sharp corners, and the side surfaces of the two limiting guide plates 10 are fixedly connected with the side surfaces of the front and rear ends of the extrusion die head 5, so that the cutting knife 11 which is sleeved with the limiting guide plate 10 can be passively adjusted and moved multiple times.

[0042] The cutting knife 11 comprises a limiting block 111 and a cutting body 112. The top and bottom of the limiting block 111 are R-shaped corners. One side of the top of the cutting body 112 is fixedly connected with one side of the limiting block 111, and the other side of the cutting body 112 can be abuttingly connected with one side surface of the shaped porous plate 8. The two ends of the limiting block 111 are movably sleeved in the two annular limiting grooves, respectively. The end surface of the limiting block 111 is movably sleeved in the annular limiting groove and can be movably connected with the inner wall of the outer sleeve rail and the surface of the inner guide rail, so as to ensure the stability and reliability of the subsequent reciprocating rotation along the annular limiting groove. The other surface of the limiting block 111 is connected with the transition connecting block, so as to meet the linkage requirement.

[0043] In the specific implementation process:

[0044] For the sludge which continuously passes through the filter template 7 and enters the plurality of second filter holes in the shaped porous plate 8, the left-to-right tapered hole structure of the second filter hole can gradually extrude and compact the sludge, and then the sludge is gradually removed from the inside of the shaped porous plate 8 in a strip shape.

[0045] After the sludge is output for a certain length, the second hydraulic cylinder 92 is started, the output end of the second hydraulic cylinder 92 drives the cutting knife 11 through the transmission joint 94 and the transition connecting block, and then the cutting body 112 in the cutting knife 11 is abuttingly contacted with the top of the output end surface of the shaped porous plate 8 under the sleeving and guiding of the limiting block 111 and the limiting guide plate 10, and performs automatic shearing on the strip-shaped sludge with a specified length. During the shearing process, the cutting body 112 is abuttingly connected to the surface of the shaped porous plate 8 under the downward tension of the tension spring 95.

[0046] After the second hydraulic cylinder 92 drives the limiting block 111 to the bottom of the annular limiting groove in the limiting guide plate 10 through the transmission joint 94 and the transition connecting block, the second hydraulic cylinder 92 needs to be closed for resetting. When the second hydraulic cylinder 92 is retracted, the arc end guide sharp corners in the annular limiting groove of the limiting guide plate 10 guide the R-shaped limiting block at both ends to be guided by the arc-shaped groove at the upper end of the annular limiting groove, so that the cutting knife 11 is separated from the porous plate and is rotated back to the initial position along the annular limiting groove away from the side space of the shaped porous plate 8 under the combined resetting drive of the tension spring 95 and the second hydraulic cylinder 92.

[0047] Then, the automatic shearing is repeatedly performed according to the above steps, and the circulating rotation of the cutting knife 11 leaves sufficient time for the strip-shaped sludge output by the shaping porous plate 8, thereby ensuring the uniform length of the sludge after subsequent shearing and granulation, and ensuring the processing quality.

[0048] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations have any such actual relationship or order. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Meanwhile, in the drawings of the utility model, the filling pattern is only for distinguishing the layers, and does not make any other limitation.

[0049] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sludge granulator with a belt-limited guide rail cutting, comprising a base (1), an extruder body (2) installed on the top of the base (1), and a feeding hopper (3) for feeding material installed on the top of the extruder body (2), characterized in that: The output port of the extruder body (2) is externally provided with a filtering die head (4) and an extrusion die head (5), and the filtering die head (4) is in space communication with the extrusion die head (5) and is installed between the extrusion die head (5) and the output port of the extruder body (2); The filtering die head (4) is internally sleeved with a linear transmission structure (6), the front and rear ends of the output structure of the linear transmission structure (6) are each sleeved with a filtering die plate (7), the interiors of the two filtering die plates (7) are each provided with a plurality of first filtering holes, and the two filtering die plates (7) can be respectively sleeved with the filtering die head (4) and form a filtering space in the interior of the filtering die head (4) under the synchronous transmission of the output structure of the linear transmission structure (6). The extrusion die head (5) is internally sleeved with a shaped perforated plate (8) which is coplanarly arranged at the open port end face of the extrusion die head (5), the interior of the shaped perforated plate (8) is provided with a plurality of second filtering holes, and the top and one side of the extrusion die head (5) are respectively provided with a shearing transmission mechanism (9) and two limiting guide plates (10), the two limiting guide plates (10) are respectively located on the side surfaces of the front and rear ends of the extrusion die head (5), the interiors of the two limiting guide plates (10) are each provided with an annular limiting groove, the output structure of the shearing transmission mechanism (9) is transmissionally connected with a cutting knife (11), and the end heads of the two ends of the cutting knife (11) are sleeved with the two annular limiting grooves and can be cyclically rotated and sheared from being attached to the surface of the shaped perforated plate (8) to being away from the shaped perforated plate (8) under the transmission of the output structure of the shearing transmission mechanism (9).

2. A sludge granulator with a restricted flight cut according to claim 1, characterised in that: The linear transmission structure (6) comprises a filling die plate (61), a support frame (62) and a first hydraulic cylinder (63), the output end of the first hydraulic cylinder (63) is transmissionally connected with the front end of the filling die plate (61) which is the output structure of the linear transmission structure (6), the filling die plate (61) can be clamped with the filtering die head (4), the interior of the filtering die head (4) is sleeved with a high-temperature-resistant sealing ring which can be attached to the surface of the filling die plate (61), the rear end of the support frame (62) is installed on the front end surface of the filtering die head (4), and a support rod is installed between the front end surface of the support frame (62) and the surface of the shell of the first hydraulic cylinder (63).

3. A sludge granulator with a cut to size guide rail according to claim 2, characterised in that: The front and rear ends of the filling die plate (61) are each provided with a T-shaped groove, a threaded hole is formed in the inner wall of the middle part of the T-shaped groove, and the two filtering die plates (7) are respectively sleeved in the two T-shaped grooves and are detachably installed with the threaded holes in the inner walls of the T-shaped grooves through screws.

4. A sludge granulator with a cut of the belt limiting guide rail according to claim 1, characterized in that: Each of the plurality of first filtering holes is composed of a first straight hole and an inverse tapered hole which is in communication with the first straight hole, and the plurality of first filtering holes are sequentially arranged along the circumference of the filtering die plate (7).

5. A sludge granulator with a restricted flight cut according to claim 1, characterised in that: Each of the plurality of second filtering holes is composed of a second straight hole and a forward tapered hole which is in communication with the second straight hole, and the plurality of second filtering holes are sequentially arranged along the circumference of the shaped perforated plate (8).

6. A sludge granulator with a restricted flight cut according to claim 1, characterized in that: The top and bottom of the annular limiting groove of the two limiting guide plates (10) are provided with arc end guide sharp corners, and the side surfaces of the two limiting guide plates (10) are fixedly connected with the side surfaces of the front and rear ends of the extrusion die head (5).

7. A sludge granulator with a restricted flight cut according to claim 1, characterised in that: The shearing transmission mechanism (9) comprises an auxiliary support plate (91) and a second hydraulic cylinder (92), the bottom of the auxiliary support plate (91) is mounted on the top surface of the extrusion die head (5), the housing surface of the top of the second hydraulic cylinder (92) is sleeved with a first movable sleeve plate (93) mounted on the top surface of the auxiliary support plate (91) through a pin shaft, the output end of the second hydraulic cylinder (92) is drivingly connected with a transmission joint (94), and one end of the transmission joint (94) is sleeved with a transition connecting block through a pin shaft.

8. A sludge granulator with a cut to size guide rail according to claim 7, characterised in that: The housing surface of the second hydraulic cylinder (92) is connected with a tension spring (95), the tension spring (95) is inclined, and one end of the tension spring (95) away from the second hydraulic cylinder (92) is fixedly connected on the surface of the auxiliary support plate (91).

9. A sludge granulator with a cut to size guide rail according to claim 7, characterised in that: The cutting knife (11) comprises a limiting block (111) and a cutting knife body (112), the top and bottom of the limiting block (111) are R-shaped edges, one side of the top of the cutting knife body (112) is fixedly connected with one side of the limiting block (111), the other side of the cutting knife body (112) can be abuttingly connected with the surface of one side of the shaped porous plate (8), the two ends of the limiting block (111) are movably sleeved in the two annular limiting grooves, and the surface of the other side of the limiting block (111) is connected with the transition connecting block.