Spiral squeezing dehydrator

Abstract

The invention relates to the technical field of material dehydration, and discloses a spiral squeezing dehydrator which comprises a bottom plate, a protective shell, a driving motor, a filter cartridge and a sliding rod. In the spiral squeezing dehydrator, the filter cartridge is pressed along a mounting groove, a clamping block in a sleeve and a second table body are automatically released from a clamping state, and the filter cartridge is popped out along the mounting groove under the pushing of a pressure spring; a threaded rod rotates to push a brush ring to reciprocate along the outer wall of the filter cylinder, drainage holes formed in the filter cylinder and an extrusion cylinder are automatically cleaned, a second spiral blade rotates to automatically feed materials in a discharging hopper into a vertical cylinder, and a first spiral blade rotates to automatically input the materials into the extrusion cylinder; the distance between the extrusion blades and the extrusion barrel is adjusted through the electric push rod, the hydraulic cylinder is matched to control the distance between the blocking block and the slag discharging ring, the material extrusion force is jointly adjusted, the situation that the device is damaged due to too large extrusion force or materials are not extruded thoroughly due to too small extrusion force is avoided, and the material dehydration effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material dewatering, in particular to a spiral press dewatering machine. BACKGROUND

[0002] In today's industrial production field, especially in the sewage treatment, papermaking, food processing and other industries, the spiral press dewatering machine plays an indispensable role as a key equipment to realize solid-liquid separation and reduce the moisture content of the material. However, the existing traditional spiral press dewatering machine has exposed many problems to be solved in the actual operation process, which seriously restricts the improvement of production efficiency, increases the operating cost, and even causes potential threat to the environment.

[0003] The filter cartridge of the traditional spiral press dewatering machine usually adopts bolt fastening or welding connection. In actual production, the filter cartridge is easily worn and corroded due to long-term contact with materials and liquids, and needs to be cleaned, maintained and replaced regularly. Since the bolt or welding method is used, the disassembly process is complicated when replacing the filter cartridge, which will cause a lot of time waste and affect the working efficiency of the device; at the same time, the drainage hole of the filter cartridge is easy to be blocked during the dewatering process, which causes the device to be unable to dewater normally. In addition, the extrusion blades of the traditional spiral press dewatering machine are mostly fixedly installed, and different materials have different physical properties (such as moisture content, viscosity, particle size, etc.), and the requirements for dewatering pressure are also different: when processing materials with high moisture content, if the extrusion pressure is insufficient, the water cannot be removed sufficiently, which will cause the material after dewatering to not reach the expected dryness. In addition, the existing spiral press dewatering machine mostly relies on manual feeding, which not only has high labor intensity, but also has low efficiency, and is difficult to meet the needs of large-scale and continuous production. SUMMARY

[0004] (I) Technical problems solved In view of the shortcomings of the prior art, the present application provides a spiral press dewatering machine, which solves the problems of complicated disassembly of the filter cartridge, easy blocking of the drainage hole of the filter cartridge, inability to adjust the extrusion pressure according to the material and low efficiency of conveying the material.

[0005] (II) Technical scheme In order to achieve the above object, the present application is implemented by the following technical scheme: a spiral press dewatering machine, comprising a bottom plate, a protective shell, a driving motor, a filter cartridge and a sliding rod, the protective shell is provided with a quick release assembly for conveniently disassembling the filter cartridge, and the upper surface of the bottom plate is provided with an auxiliary assembly: The quick disassembly assembly comprises a mounting groove formed in a protective shell, a fixed plate fixedly connected in the mounting groove, a sleeve fixedly connected to one end of the filter cartridge close to the fixed plate, two expansion grooves symmetrically formed in the sleeve, an expansion rod slidingly connected in the expansion grooves, a second table body and a top column mounted at two ends of the expansion rod, the top column being fixedly connected with the fixed plate, a first table body slidingly connected with the outer wall of the expansion rod, a clamping block fixedly connected to one end of the expansion rod close to the second table body, and the clamping block being matched with the second table body. The auxiliary assembly comprises a feeding hopper and a vertical cylinder fixedly connected to the upper surface of the bottom plate, a feeding groove is formed in the feeding hopper, a second spiral blade is rotatably connected in the feeding groove, a first spiral blade is rotatably connected in the vertical cylinder, and the feeding groove is communicated with the vertical cylinder.

[0006] Preferably, an extrusion cylinder is fixedly connected in the protective shell, a spline rod is rotatably connected in the extrusion cylinder, an extrusion blade is slidingly connected with the outer wall of the spline rod, and the spline rod is fixedly connected with the output end of the driving motor.

[0007] Preferably, an adjusting groove is formed in the spline rod, an electric push rod is fixedly connected in the adjusting groove, a connecting plate is fixedly connected to the output end of the electric push rod, and the connecting plate is fixedly connected with the extrusion blade.

[0008] Preferably, an installation hole is formed in the filter cartridge, a threaded rod is rotatably connected in the installation hole, a brush ring is sleeved on the outer wall of the filter cartridge, a threaded seat is fixedly connected to the inner ring wall of the brush ring, and the threaded rod is threadedly connected with the threaded seat.

[0009] Preferably, a mounting bracket is fixedly connected to the end of the protective shell away from the driving motor, and a hydraulic cylinder is fixedly connected to the mounting bracket.

[0010] Preferably, a deslagging ring is fixedly connected to one end of the extrusion cylinder close to the mounting bracket, a plug is fixedly connected to the output end of the hydraulic cylinder, and the plug is matched with the deslagging ring.

[0011] Preferably, a deslagging pipe is fixedly connected in the vertical cylinder, feeding holes are formed in the protective shell and the extrusion cylinder, the deslagging pipe is fixedly connected with the feeding holes, and the deslagging pipe is communicated with the extrusion cylinder.

[0012] Preferably, a compression spring is sleeved on the outer wall of the top column, and the compression spring is located between the sleeve and the fixed plate.

[0013] Preferably, a liquid collecting box is fixedly connected to the arc-shaped end of the protective shell.

[0014] Preferably, a sliding groove is formed in the extrusion blade, and the sliding groove is matched with the spline rod.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1、the present application, by setting the quick release assembly solves the existing device filter cartridge disassembly cumbersome and filter cartridge drain hole easy to block the problem, along the installation groove press filter cartridge, sleeve inside the block and the second body automatically release the state of clamping, and under the push of the compression spring along the installation groove filter cartridge is ejected, realize the quick disassembly of filter cartridge, improve the filter cartridge replacement efficiency. Threaded rod rotation push brush ring along the outer wall of the filter cylinder reciprocating movement, automatically clean the filter cartridge and extrusion cylinder drain hole, avoid the drain hole blockage, improve the working efficiency of the device; 2、the present application, by setting the auxiliary assembly solves the existing device cannot adjust the extrusion force according to the material and the problem of low conveying material efficiency, the second spiral blade rotation will put the material in the hopper into the vertical cylinder, the first spiral blade rotation will automatically input material into the extrusion cylinder, and automatically scatter the material during conveying, avoid the blockage of conveying pipe, effectively improve the efficiency of the device conveying material. Adjust the distance between the extrusion blade and the extrusion cylinder through the electric push rod, cooperate with the hydraulic cylinder to control the distance between the block and the deslagging ring, adjust the material extrusion force together, avoid the damage of the device caused by too large extrusion force, or the incomplete extrusion of material caused by too small extrusion force, realize the adjustment of the material extrusion force, improve the material dehydration effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the spiral press dewatering machine of the present application; Figure 2 It is the sectional view structure diagram of the material hopper of the spiral press dewatering machine of the present application; Figure 3 It is the sectional view structure diagram of the protective shell of the spiral press dewatering machine of the present application; Figure 4 It is the sectional view structure diagram of the filter cartridge of the spiral press dewatering machine of the present application; Figure 5 It is the sectional view structure diagram of the extrusion cylinder of the spiral press dewatering machine of the present application; Figure 6 It is the sectional view structure diagram of the sleeve of the spiral press dewatering machine of the present application; Figure 7 It is the sectional view structure diagram of the spline rod of the spiral press dewatering machine of the present application.

[0017] In the figure: 1, bottom plate; 2, protective shell; 3, mounting frame; 4, hydraulic cylinder; 5, liquid collecting box; 6, discharge hopper; 7, vertical cylinder; 8, discharge pipe; 9, driving motor; 10, first spiral blade; 11, feed slot; 12, second spiral blade; 13, block; 14, brush ring; 15, filter cylinder; 16, mounting groove; 17, mounting hole; 18, compression spring; 19, feed hole; 20, spline rod; 21, threaded seat; 22, threaded rod; 23, extrusion cylinder; 24, extrusion blade; 25, slag discharge ring; 26, sleeve; 27, fixed plate; 28, top column; 29, sliding rod; 30, first body; 31, expansion groove; 32, expansion rod; 33, clamping block; 34, second body; 35, adjusting groove; 36, electric push rod; 37, connecting plate; 38, sliding groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0019] Reference Figures 1-7 The spiral press dewatering machine shown in the figure comprises a bottom plate 1, a protective shell 2, a driving motor 9, a filter cylinder 15 and a sliding rod 29, the protective shell 2 is internally provided with a quick-release assembly facilitating the dismounting of the filter cylinder 15, the upper surface of the bottom plate 1 is provided with an auxiliary assembly, the quick-release assembly comprises a mounting groove 16 opened in the protective shell 2, the mounting groove 16 is fixedly connected with a fixed plate 27, one end of the filter cylinder 15 close to the fixed plate 27 is fixedly connected with a sleeve 26, two expansion grooves 31 are symmetrically opened in the sleeve 26, an expansion rod 32 is slidably connected in the expansion groove 31, the sliding rod 29 is provided at both ends with a second body 34 and a top column 28, the top column 28 is fixedly connected with the fixed plate 27, the outer wall of the sliding rod 29 is slidably connected with a first body 30, one end of the expansion rod 32 close to the second body 34 is fixedly connected with a clamping block 33, and the clamping block 33 is adapted to the second body 34; the filter cylinder 15 is provided with a mounting hole 17, the mounting hole 17 is rotatably connected with a threaded rod 22, the outer wall of the filter cylinder 15 is sleeved with a brush ring 14, the inner ring wall of the brush ring 14 is fixedly connected with a threaded seat 21, and the threaded rod 22 is threadedly connected with the threaded seat 21, the outer wall of the top column 28 is sleeved with a compression spring 18, and the compression spring 18 is located between the sleeve 26 and the fixed plate 27.

[0020] In order to improve the convenience of disassembling the device filter cartridge 15 and avoid the filter cartridge 15 drain hole blockage, the application sets a quick release assembly, by pressing the filter cartridge 15 along the installation groove 16, the clamping block 33 in the sleeve 26 and the second base 34 are automatically released from the clamping state, and the filter cartridge 15 is pushed out along the installation groove 16 under the push of the compression spring 18, realizing the quick disassembly of the filter cartridge 15 and improving the filter cartridge 15 replacement efficiency. The threaded rod 22 rotates to push the brush ring 14 to reciprocate along the outer wall of the filter cartridge 15, automatically cleaning the drain holes opened on the filter cartridge 15 and the extrusion cylinder 23, avoiding the drain hole blockage and improving the working efficiency of the device.

[0021] Specifically, first, press the filter cartridge 15 along the installation groove 16 to the direction of the driving motor 9, the filter cartridge 15 is attached to the inner wall of the installation groove 16, and the contact end of the filter cartridge 15 and the installation groove 16 is provided with a sealing strip, the sleeve 26 extrudes the compression spring 18 to make the clamping block 33 push the first base 30 to move along the slide rod 29, when the first base 30 is attached to the top column 28, the clamping block 33 is extruded by the first base 30 to shrink along the telescopic groove 31, when the clamping block 33 passes the first base 30 away from the end of the top column 28, the clamping block 33 extends along the tapered end of the first base 30 under the spring rebound force of the spring sleeved thereon, reversely pulls the filter cartridge 15 to make the clamping block 33 clamp the first base 30 to move along the slide rod 29, so that the first base 30 is attached to the second base 34, and the clamping block 33 is retracted along the tapered end of the first base 30 by reverse pulling, when the clamping block 33 passes the attached end of the first base 30 and the second base 34, the clamping block 33 extends along the tapered end of the second base 34, at this time, the clamping block 33 and the second base 34 are released from the clamping, and the filter cartridge 15 is automatically pushed out along the installation groove 16 under the push of the compression spring 18, it is worth noting that the diameter of the compression spring 18 is greater than the diameter of the top column 28, the first base 30 and the second base 34, and the first base 30 and the second base 34 are both circular truncated cone shape, and have the same size and are oppositely arranged.

[0022] Secondly, the driving device matched with the threaded rod 22 drives the threaded rod 22 to rotate, the driving device is fixedly connected with the filter cartridge 15, and the non-threaded segment of the threaded rod 22 is located at the installation hole 17, so that the threaded rod 22 does not drive the filter cartridge 15 to rotate, since the inner ring wall of the brush ring 14 is provided with the threaded seat 21, and the outer ring wall of the brush ring 14 is fixedly connected with the sliding block, and the sliding block is matched with the sliding groove opened on the protective shell 2, the sliding groove is not specifically shown in the figure, the threaded rod 22 drives the brush ring 14 to slide along the sliding groove opened on the protective shell 2 by rotating, and the brush on the brush ring 14 automatically cleans the drain holes opened on the filter cartridge 15 and the extrusion cylinder 23, so as to keep the drain holes unobstructed and avoid the blockage affecting the dehydration efficiency of the device.

[0023] Reference Figures 1-7The auxiliary assembly comprises a feeding hopper 6 fixedly connected to the upper surface of the bottom plate 1, and a vertical cylinder 7, the feeding hopper 6 is provided with a feeding groove 11, the feeding groove 11 is rotatably connected with a second spiral blade 12, the vertical cylinder 7 is rotatably connected with a first spiral blade 10, and the feeding groove 11 is communicated with the vertical cylinder 7, the protective shell 2 is fixedly connected with an extrusion cylinder 23, the extrusion cylinder 23 is rotatably connected with a spline shaft 20, the outer wall of the spline shaft 20 is slidably connected with an extrusion blade 24, and the spline shaft 20 is fixedly connected with the output end of the driving motor 9, the spline shaft 20 is provided with an adjusting groove 35, the adjusting groove 35 is fixedly connected with an electric push rod 36, the output end of the electric push rod 36 is fixedly connected with a connecting plate 37, and the connecting plate 37 is fixedly connected with the extrusion blade 24, one end of the protective shell 2 away from the driving motor 9 is fixedly connected with a mounting frame 3, the mounting frame 3 is fixedly connected with a hydraulic cylinder 4, one end of the extrusion cylinder 23 close to the mounting frame 3 is fixedly connected with a slag discharge ring 25, the output end of the hydraulic cylinder 4 is fixedly connected with a block 13, and the block 13 is matched with the slag discharge ring 25, the vertical cylinder 7 is fixedly connected with a discharge pipe 8, the protective shell 2 and the extrusion cylinder 23 are both provided with a feeding hole 19, the discharge pipe 8 is fixedly connected with the feeding hole 19, and the discharge pipe 8 is communicated with the extrusion cylinder 23, the arc-shaped end of the protective shell 2 is fixedly connected with a liquid collecting box 5, the extrusion blade 24 is provided with a sliding groove 38, and the sliding groove 38 is matched with the spline shaft 20.

[0024] In order to improve the feeding efficiency of the device and improve the material dehydration effect, the auxiliary assembly is arranged, the material in the feeding hopper 6 is automatically sent into the vertical cylinder 7 through the rotation of the second spiral blade 12, the material is automatically input into the extrusion cylinder 23 through the rotation of the first spiral blade 10, and the material is automatically dispersed during conveying, so as to avoid the blockage of the conveying pipe and effectively improve the conveying efficiency of the device.

[0025] Specifically, first, the power system matched with the second spiral blade 12 drives the second spiral blade 12 to rotate, the material in the feeding hopper 6 is input into the vertical cylinder 7 through the feeding groove 11, the power system matched with the first spiral blade 10 drives the first spiral blade 10 to rotate, and the material is conveyed into the discharge pipe 8, and the first spiral blade 10 is attached to the inner wall of the vertical cylinder 7, and the second spiral blade 12 is attached to the inner wall of the feeding groove 11, so as to improve the transportation efficiency of the material, and the material is dispersed during transportation to avoid the blockage of the transportation pipeline, the discharge pipe 8 is provided with a humidity sensor, the water content of the material is automatically detected, and the detection result is transmitted to the processor of the device, and the above-mentioned humidity sensor and processor are all existing components, which will not be described here.

[0026] Secondly, the controller of the device controls the electric push rod 36 to adjust the distance between the extrusion blade 24 and the extrusion cylinder 23, the driving motor 9 drives the spline rod 20 to rotate, gradually transmits the material in the input extrusion cylinder 23 to the slag ring 25, and the pressure sensor installed on the inner wall of the extrusion cylinder 23 and the humidity sensor installed at the slag ring 25 monitor the extrusion pressure and water content of the material. When it is monitored that the extrusion pressure of the material is too large, the electric push rod 36 is controlled to retract, the distance between the extrusion blade 24 and the extrusion cylinder 23 is increased, at the same time, the hydraulic cylinder 4 is controlled to retract, the distance between the blocking block 13 and the slag ring 25 is increased, the extrusion pressure of the material is controlled by the common adjustment of the electric push rod 36 and the hydraulic cylinder 4, and the device is prevented from being damaged due to the too large extrusion pressure. When it is detected that the extrusion pressure of the material is too small, the hydraulic cylinder 4 is controlled to extend to reduce the distance between the blocking block 13 and the slag ring 25 or the electric push rod 36 is controlled to extend to reduce the distance between the extrusion blade 24 and the extrusion cylinder 23, the extrusion pressure of the material is increased, and the humidity of the material is detected by the humidity sensor. When it is detected that the humidity of the material is abnormal, the hydraulic cylinder 4 and the electric push rod 36 are adjusted according to the above method to adjust the humidity of the material, and the liquid squeezed out by the device flows into the liquid collecting box 5 for collection.

[0027] The working principle of the present application is as follows: the second spiral blade 12 rotates to automatically feed the material in the feeding hopper 6 into the vertical cylinder 7, the first spiral blade 10 rotates to automatically feed the material into the extrusion cylinder 23, and automatically disperses the material during conveying to avoid blockage of the conveying pipe. A humidity sensor is arranged in the discharge pipe 8 to automatically detect the water content of the material and transmit the detection result to the processor of the device. The controller of the device controls the electric push rod 36 to adjust the distance between the extrusion blade 24 and the extrusion cylinder 23, and the drive motor 9 drives the spline rod 20 to rotate, gradually transmitting the material in the extrusion cylinder 23 to the discharge ring 25. The distance between the extrusion blade 24 and the extrusion cylinder 23 is adjusted by the electric push rod 36, and the distance between the block 13 and the discharge ring 25 is controlled by the hydraulic cylinder 4, so as to control the extrusion pressure of the material and avoid damage to the device caused by excessive extrusion pressure. When the material extrusion pressure is detected to be too small, the hydraulic cylinder 4 is controlled to elongate to reduce the distance between the block 13 and the discharge ring 25, or the electric push rod 36 is controlled to elongate to reduce the distance between the extrusion blade 24 and the extrusion cylinder 23, so as to increase the material extrusion pressure. When the material humidity is detected to be abnormal, the hydraulic cylinder 4 and the electric push rod 36 are adjusted according to the above method to adjust the humidity of the material. The drive device matched with the threaded rod 22 drives the threaded rod 22 to rotate, the brush ring 14 slides along the sliding groove opened on the protective shell 2 by the rotation of the threaded rod 22, and the brush on the brush ring 14 automatically cleans the drain hole opened on the filter cylinder 15 and the extrusion cylinder 23, so as to keep the drain hole unobstructed. The liquid squeezed out by the device flows into the liquid collecting box 5 for collection. When it is necessary to disassemble the filter cylinder 15, the filter cylinder 15 is pressed in the direction of the drive motor 9 along the mounting groove 16, the sleeve 26 extrudes the compression spring 18 to make the clamping block 33 push the first body 30 to move along the sliding rod 29. When the first body 30 is attached to the top column 28, the clamping block 33 is extruded along the first body 30 to shrink. When the clamping block 33 is away from the end of the top column 28, the clamping block 33 is extruded along the tapered end of the first body 30 under the spring rebound force, reversely pulling the filter cylinder 15 to make the clamping block 33 clamp the first body 30 to move along the sliding rod 29, so that the first body 30 is attached to the second body 34. The clamping block 33 is again extruded along the tapered end of the first body 30 by reverse pulling. When the clamping block 33 is away from the attached end of the first body 30 and the second body 34, the clamping block 33 is extruded along the tapered end of the second body 34. At this time, the clamping block 33 is disengaged from the second body 34, and the filter cylinder 15 is automatically ejected along the mounting groove 16 under the pushing of the compression spring 18.

[0028] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A screw press dewaterer comprising a base plate (1), a protective shell (2), a drive motor (9), a filter cartridge (15) and a slide bar (29), characterized in that, The quick release assembly is installed in the protective shell (2) and facilitates the dismounting of the filter cartridge (15), and the upper surface of the bottom plate (1) is provided with an auxiliary assembly: The quick release assembly comprises a mounting groove (16) formed in the protective shell (2), a fixed plate (27) fixedly connected in the mounting groove (16), a sleeve (26) fixedly connected to one end of the filter cartridge (15) close to the fixed plate (27), two symmetrical expansion grooves (31) formed in the sleeve (26), an expansion rod (32) slidably connected in the expansion groove (31), a second table body (34) and a top column (28) mounted at the two ends of the expansion rod (32), the top column (28) being fixedly connected with the fixed plate (27), a first table body (30) slidably connected with the outer wall of the expansion rod (29), a clamping block (33) fixedly connected to one end of the expansion rod (32) close to the second table body (34), and the clamping block (33) being matched with the second table body (34). The auxiliary assembly comprises a discharging hopper (6) and a vertical cylinder (7) fixedly connected to the upper surface of the bottom plate (1), the discharging hopper (6) is provided with an inlet groove (11), the inlet groove (11) is rotatably connected with a second spiral blade (12), and the vertical cylinder (7) is rotatably connected with a first spiral blade (10).

2. A screw press dewaterer according to claim 1, characterised in that: The protective shell (2) is fixedly connected with an extrusion cylinder (23), the extrusion cylinder (23) is rotatably connected with a spline rod (20), and the outer wall of the spline rod (20) is slidably connected with an extrusion blade (24), and the spline rod (20) is fixedly connected with the output end of the driving motor (9).

3. A screw press dewaterer according to claim 2, characterised in that: The spline rod (20) is provided with an adjusting groove (35), the adjusting groove (35) is fixedly connected with an electric push rod (36), the output end of the electric push rod (36) is fixedly connected with a connecting plate (37), and the connecting plate (37) is fixedly connected with the extrusion blade (24).

4. A screw press dewaterer according to claim 1, characterised in that: The filter cartridge (15) is provided with a mounting hole (17), the mounting hole (17) is rotatably connected with a threaded rod (22), the outer wall of the filter cartridge (15) is sleeved with a brush ring (14), the inner ring wall of the brush ring (14) is fixedly connected with a threaded seat (21), and the threaded rod (22) is threadedly connected with the threaded seat (21).

5. A screw press dewaterer according to claim 2, characterised in that: The end of the protective shell (2) away from the driving motor (9) is fixedly connected with a mounting frame (3), and the mounting frame (3) is fixedly connected with a hydraulic cylinder (4).

6. A screw press dewaterer according to claim 5, characterised in that: The end of the extrusion cylinder (23) close to the mounting frame (3) is fixedly connected with a deslagging ring (25), the output end of the hydraulic cylinder (4) is fixedly connected with a blocking block (13), and the blocking block (13) is matched with the deslagging ring (25).

7. A screw press dewaterer according to claim 2, characterised in that: The vertical cylinder (7) is fixedly connected with a discharging pipe (8), the protective shell (2) and the extrusion cylinder (23) are both provided with an inlet hole (19), the discharging pipe (8) is fixedly connected with the inlet hole (19), and the discharging pipe (8) is communicated with the extrusion cylinder (23).

8. A screw press dewaterer according to claim 1, characterised in that: The outer wall of the top column (28) is sleeved with a compression spring (18), and the compression spring (18) is located between the sleeve (26) and the fixed plate (27).

9. A screw press dewaterer according to claim 1, characterised in that: The arc-shaped end of the protective shell (2) is fixedly connected with a liquid collecting box (5).

10. A screw press dewaterer according to claim 2, characterised in that: The extrusion blade (24) is provided with a sliding groove (38), and the sliding groove (38) is matched with the spline shaft (20).

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