Pile wedge type hydraulic dehydrator for cultivation sludge

Abstract

The invention provides a pile wedge type culture sludge hydraulic dehydrator which comprises a feeding system, a hydraulic dehydrator and a hydraulic dehydrator, wherein the feeding system is a feeding box provided with a feeding hole; the thrust system comprises a thrust cavity provided with a thrust column and is used for pushing the breeding sludge to move, and a negative pressure valve is arranged at the end of the thrust column; the draining system comprises a draining chamber, a plurality of draining holes are formed in the draining chamber, and a draining net is arranged in the draining chamber and used for dewatering the breeding sludge; the discharging system comprises a discharging valve seat and is used for discharging the dehydrated breeding sludge through opening and closing of the discharging valve seat. Breeding sludge is put into the feeding box, the thrust column pushes the breeding sludge into the draining cavity through movement to be dehydrated, under the action of the negative pressure valve, negative pressure is formed in the draining cavity, the draining net moves towards the breeding sludge under the action of the negative pressure, the draining function is promoted, the draining net can be prevented from being blocked under the action of the negative pressure, and therefore the draining effect is improved. According to the device, the efficient breeding sludge dewatering effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge dewatering, and in particular relates to a pile-wedge type aquaculture sludge hydraulic dewatering machine. Background Art

[0002] With the popularization of livestock and poultry farming, more and more sludge is generated by livestock and poultry farming, and it is necessary to treat the sludge generated by livestock and poultry farming. The way to treat the sludge is to first dehydrate the sludge to obtain sewage and mud cake, and then treat the dewatering and mud cake separately.

[0003] At present, in the prior art, when enterprises dehydrate aquaculture sludge with different water contents, they generally adjust the water content of the exported sludge by adjusting the combination of multiple dehydration devices and dehydration processes, so as to obtain sludge with appropriate water content. However, in the prior art sludge dehydration and filtration treatment process, when the sludge and impurities therein are operated through the drain net, the sludge and impurities are easily blocked by the drain net during the dehydration process under the influence of gravity, and the drain net needs to be cleaned many times, so the process is complicated, the efficiency is low, the water content is high, and the production cost is increased. Summary of the invention

[0004] The present invention provides a pile-wedge type aquaculture sludge hydraulic dewatering machine, which solves the above problems.

[0005] The technical solution of the present invention is achieved as follows: a pile-wedge type aquaculture sludge hydraulic dewatering machine, comprising:

[0006] A feeding system, comprising a feeding box, wherein the feeding box is provided with a feeding port for feeding aquaculture sludge;

[0007] A thrust system, comprising a thrust chamber, wherein a thrust column is arranged in the thrust chamber for pushing the aquaculture sludge to move, and a negative pressure valve is arranged at the end of the thrust column;

[0008] A drainage system, comprising a drainage chamber, wherein the drainage chamber is provided with a plurality of drainage holes, and a drainage net is provided in the drainage chamber for dehydrating the aquaculture sludge;

[0009] The discharge system comprises a discharge valve seat, and is used to discharge the dehydrated aquaculture sludge through the opening and closing of the discharge valve seat.

[0010] The present invention puts the aquaculture sludge into the feed box through the feed port, and sinks it into the thrust chamber. The thrust column moves to push the aquaculture sludge into the drainage chamber for dehydration. Under the action of the negative pressure valve, the drainage chamber is under negative pressure. Under the action of the negative pressure, the drainage net moves toward the aquaculture sludge to promote the drainage function. The drainage net can also be prevented from being blocked under the action of the negative pressure. The drained aquaculture sludge is taken out through the discharging system, thereby realizing efficient aquaculture sludge dehydration.

[0011] As a preferred embodiment, a return pipe is connected to the top of the feed box, a material guide box is connected to the bottom of the feed box, and the cross-sectional area of ​​the top end of the material guide box is larger than the cross-sectional area of ​​the bottom end of the material guide box.

[0012] The present invention has the aquaculture sludge entering from the feed port pushed by the thrust column, while the aquaculture sludge continuously poured in is accumulated in the feed box, and the excess aquaculture sludge is discharged through the reflux pipe. After the thrust column returns to its position, the fallen aquaculture sludge continues to be pushed into the drainage system for drainage.

[0013] As a preferred embodiment, the pushing chamber comprises:

[0014] A first thrust cavity is provided with a piston rod, a piston is provided at the rear end of the piston rod, and a first sealing ring is provided at the head end of the piston rod;

[0015] The second thrust cavity is provided with a squeezing rod, the tail end of the squeezing rod is connected to the piston rod through a squeezing nut, the head end of the squeezing rod is provided with a negative pressure valve, and the second thrust cavity is provided with an oblique pressure relief hole;

[0016] A third thrust cavity is connected to the bottom of the feed box;

[0017] The fourth thrust cavity has a longitudinal cross-sectional area that gradually increases from an end close to the third thrust cavity to an end far away from the third thrust cavity;

[0018] The first thrust chamber, the second thrust chamber, the third thrust chamber and the fourth thrust chamber are connected in sequence by bolts.

[0019] The present invention firstly ensures the sealing of the thrust chamber by means of a sealing ring, and further realizes the effect of a negative pressure state in the drain chamber. The present invention pushes out and returns the pressing rod by means of a piston rod. During the thrust process, the negative pressure valve is in a closed state, and the drain chamber is in a negative pressure state. During the return process, the negative pressure valve is in an open state, and the air pressure returns to a normal state under the action of the pressure relief hole.

[0020] As a preferred embodiment, the drainage chamber includes a first filter cartridge connecting part and a second filter cartridge connecting part that are integrally connected, the longitudinal cross-sectional area of ​​the second filter cartridge connecting part close to one end of the first filter cartridge connecting part is larger than the longitudinal cross-sectional area of ​​the end away from the first filter cartridge connecting part, the drainage net is arranged on the inner side of the first filter cartridge connecting part, and a plurality of reinforcing ribs are arranged on the outside of the first filter cartridge connecting part, and the plurality of reinforcing ribs are connected by longitudinal ribs.

[0021] As a preferred embodiment, a water receiving rack is provided below the first filter cartridge connection portion, the water receiving rack is arranged in an arc shape, the water receiving rack and the reinforcing ribs are fixedly connected, a drain outlet is provided at the bottom end of the water receiving rack, and a water collecting tank is provided below the drain outlet.

[0022] The water drained through the drain hole of the present invention is led out through the water receiving frame, and the led out water enters the water collecting box through the drain port. After the water in the water collecting box is collected to a certain extent, it is discharged through the pipeline.

[0023] As a preferred embodiment, a cleaning shaft is arranged in the drain chamber, and a cleaning body is arranged in a spiral shape along the axial direction on the outer side of the cleaning shaft, and the cleaning body includes a first cleaning part and a second cleaning part.

[0024] The present invention can promote the movement of aquaculture sludge in the drainage chamber to prevent accumulation through the rotation of the cleaning part, and can also clean the drainage net to prevent impurities from clogging the mesh holes of the drainage net.

[0025] As a preferred embodiment, one end of the fourth thrust cavity and the first filter cartridge connecting part are connected by a hinge, and the other end is connected by a connecting part, the connecting part includes a first connecting member, the first connecting member is arranged on the outside of the first filter cartridge connecting part, the second connecting member is rotatably arranged on the first connecting member, a slot is arranged on the outside of the fourth thrust cavity, the second connecting member is inserted into the slot by rotation, and is fixed by a nut.

[0026] The present invention can replace the drain net by opening or closing the connection part. After removing the nut and rotating the second connection part, the first filter cartridge connection part can be opened through the hinge part to replace the drain net therein. After the replacement is completed, the second filter cartridge connection part is closed, the second connection part is rotated to insert the notch, and the nut is screwed in to fix it.

[0027] As a preferred embodiment, the discharge valve seat includes a first seat body and a second seat body, a discharge valve plate is arranged inside the first seat body, after the cleaning shaft passes through the discharge valve plate, it is fixedly connected between the bearing seat and the second seat body, a discharge top plate is arranged outside the second seat body, the discharge valve plate and the discharge top plate are connected by a discharge top rod, a discharge baffle is arranged outside the discharge top plate, the discharge baffle and the second seat body are fixedly connected by a discharge gear rod, and a discharge valve spring is arranged outside the discharge gear rod.

[0028] The present invention discharges the dehydrated aquaculture sludge through the discharge valve seat. After the aquaculture sludge accumulates, the discharge valve plate is pushed out under the action of pressure. Under the action of the discharge push rod, the discharge valve plate and the discharge top plate move at the same time, and the dehydrated aquaculture sludge is discharged from the outlet. At this time, the discharge valve spring is in a compressed state. When the accumulation degree of the aquaculture sludge is not sufficient to push the discharge valve plate to move, the discharge valve plate returns to its initial position under the elastic force of the discharge valve spring, and the outlet of the drainage chamber is in a closed state.

[0029] As a preferred embodiment, the negative pressure valve includes a negative pressure core shaft, a negative pressure valve seat is arranged between the negative pressure core shaft and the second thrust cavity, a negative pressure baffle is arranged at the tail end of the negative pressure core shaft, and a negative pressure spring is arranged on the outside of the negative pressure core shaft.

[0030] As a preferred embodiment, the negative pressure core shaft includes a first core shaft connecting portion, the first core shaft connecting portion passes through the negative pressure valve seat, the negative pressure baffle is arranged at the tail end of the first core shaft connecting portion, the negative pressure spring is arranged between the negative pressure baffle and the negative pressure valve seat, a second core shaft connecting portion is arranged at the head end of the first core shaft connecting portion, and a second sealing ring is arranged between the second core shaft connecting portion and the negative pressure valve seat.

[0031] The present invention adjusts the pressure through a negative pressure valve. When the thrust column pushes the aquaculture sludge to move, the negative pressure valve is in a closed state. At this time, the second core shaft connecting part and the negative pressure valve seat are in contact with each other, and a sealing effect is achieved through the second sealing ring. At this time, the negative pressure spring is in a compressed state. When the thrust column returns to its initial position, the negative pressure valve is in an open state. At this time, the second core shaft connecting part returns to its initial position under the elastic force of the negative pressure spring, and the second core shaft connecting part is away from the negative pressure valve seat. Under the action of the pressure relief hole, the pressure is balanced.

[0032] After adopting the above technical solution, the beneficial effects of the present invention are:

[0033] 1. The present invention puts the aquaculture sludge into the feed box through the feed port, and enters the thrust chamber through the guide box. The thrust column moves to push the aquaculture sludge into the drainage chamber for dehydration. Under the action of the negative pressure valve, the drainage chamber is under negative pressure. Under the action of the negative pressure, the drainage net moves toward the aquaculture sludge to promote the drainage function. The drainage net can also be prevented from being blocked under the action of the negative pressure. The aquaculture sludge after drainage is taken out through the discharging system, thereby realizing high-efficiency and continuous aquaculture sludge dehydration.

[0034] 2. The present invention adjusts the pressure through a negative pressure valve. When the thrust column pushes the aquaculture sludge to move, the negative pressure valve is in a closed state. At this time, the second core shaft connection part and the negative pressure valve seat are in contact with each other, and a sealing effect is achieved through the second sealing ring. At this time, the negative pressure spring is in a compressed state. When the thrust column returns to its initial position, the negative pressure valve is in an open state. When returning to the initial position, the second core shaft connection part returns to the initial position under the elastic force of the negative pressure spring. The second core shaft connection part is away from the negative pressure valve seat, and the pressure is balanced under the action of the pressure relief hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a structural schematic diagram of the present invention;

[0037] Figure 2 Another structural schematic diagram of the present invention;

[0038] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0039] Figure 4 It is a structural schematic diagram of the water receiving rack;

[0040] Figure 5 It is a structural schematic diagram of the discharge valve seat;

[0041] Figure 6 It is a schematic diagram of the structure of the cleaning body;

[0042] Figure 7 It is a structural schematic diagram of a negative pressure valve;

[0043] Figure 8 It is another structural schematic diagram of the negative pressure valve.

[0044] In the figure, 1-feeding system; 2-thrust system; 3-drainage system; 4-discharging system; 5-connecting part; 6-hinge part; 10-feeding box; 11-return pipe; 12-material guide box; 13-feeding port; 20-first thrust cavity; 21-second thrust cavity; 22-third thrust cavity; 23-fourth thrust cavity; 24-thrust column; 26-negative pressure valve; 240-piston rod; 241-piston; 243-pressing rod; 244-pressing mother; 260-first mandrel connecting part; 261-second mandrel connecting part; 262-negative pressure valve seat; 263-negative pressure baffle; 264- The second sealing ring; 30-drain chamber; 31-drain hole; 32-reinforcement rib; 33-longitudinal rib; 34-water receiving rack; 35-drain outlet; 36-water collecting box; 37-cleaning shaft; 38-cleaning body; 300-first filter cartridge connecting part; 301-second filter cartridge connecting part; 380-first cleaning part; 381-second cleaning part; 40-first seat body; 41-second seat body; 43-discharge valve plate; 44-discharge top plate; 45-discharge top rod; 46-discharge baffle; 47-discharge stop rod; 48-discharge valve spring; 40-first connecting part; 41-second connecting part; 42-slot. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1

[0047] according to Figures 1 to 8 As shown, a pile-wedge type aquaculture sludge hydraulic dewatering machine includes a feeding system 1, and the feeding system 1 includes a feeding box 10. The feeding box 10 is provided with a feeding port 13 for inputting aquaculture sludge. The top of the feeding box 10 is connected with a return pipe 11, and the bottom of the feeding box 10 is connected with a material guide box 12. The cross-sectional area of ​​the top end of the material guide box 12 is larger than the cross-sectional area of ​​the bottom end of the material guide box 12.

[0048] The present invention pushes the aquaculture sludge entering from the feed port 13 to drain water, while the aquaculture sludge continuously poured in is pushed and accumulated in the feed box 10, and the excess aquaculture sludge is discharged through the reflux pipe 11. After the thrust column returns to its position, the falling aquaculture sludge continues to be pushed and drained. Therefore, the present invention can automatically realize the continuous input and dehydration of aquaculture sludge.

[0049] The present invention also includes a thrust system 2, wherein the thrust chamber includes a first thrust chamber, a second thrust chamber, a third thrust chamber and a fourth thrust chamber which are sequentially connected by bolts. A piston rod 240 is provided in the first thrust chamber 20, a piston is provided at the tail end of the piston rod 240, and a first sealing ring is provided at the head end of the piston rod 240.

[0050] The second thrust cavity 21 is provided with a pressing rod 243, the tail end of the pressing rod 243 is connected to the piston rod 240 through a pressing nut 244, a negative pressure valve is provided at the head end of the pressing rod 243, and an oblique pressure relief hole is provided in the second thrust cavity 21. The negative pressure valve includes a negative pressure core shaft, a negative pressure valve seat 262 is provided between the negative pressure core shaft and the second thrust cavity 21, a negative pressure baffle 263 is provided at the tail end of the negative pressure core shaft, and a negative pressure spring is provided on the outside of the negative pressure core shaft.

[0051] The negative pressure core shaft includes a first core shaft connection part 260, which passes through the negative pressure valve seat 262, the negative pressure baffle 263 is arranged at the tail end of the first core shaft connection part 260, the negative pressure spring is arranged between the negative pressure baffle 263 and the negative pressure valve seat 262, and the head end of the first core shaft connection part 260 is provided with a second core shaft connection part 261, and a second sealing ring is arranged between the second core shaft connection part 261 and the negative pressure valve seat 262. The present invention adjusts the pressure through a negative pressure valve. When the thrust column pushes the aquaculture sludge to move, the negative pressure valve is in a closed state. At this time, the second core shaft connection part 261 and the negative pressure valve seat 262 are in contact with each other, and a sealing effect is achieved through the second sealing ring. At this time, the negative pressure spring is in a compressed state. When the pressing rod 243 returns to its initial position, the negative pressure valve is in an open state. At this time, the second core shaft connection part 261 returns to its initial position under the elastic force of the negative pressure spring, and the second core shaft connection part 261 is away from the negative pressure valve seat 262. Under the action of the pressure relief hole, the pressure is balanced.

[0052] The third thrust cavity 22 is connected to the bottom of the feed box 10. After the aquaculture sludge falls from the guide box 12 and enters the third thrust cavity 22, it is pushed into the drainage cavity by the pressing rod 243. The longitudinal cross-sectional area of ​​the fourth thrust cavity 23 gradually increases from one end close to the third thrust cavity to the end far away from the third thrust cavity.

[0053] The present invention also includes a drainage system 3, which includes a drainage chamber 30. The drainage chamber 30 includes a first filter cartridge connection part 300 and a second filter cartridge connection part 301 which are integrally connected. The longitudinal cross-sectional area of ​​the second filter cartridge connection part 301 near the first filter cartridge connection part 300 is larger than the longitudinal cross-sectional area of ​​the end away from the first filter cartridge connection part 300. The drainage net is arranged on the inner side of the first filter cartridge connection part 300. The outer side of the first filter cartridge connection part 300 is provided with a plurality of reinforcing ribs 32, and the plurality of reinforcing ribs 32 are connected by longitudinal ribs 33. Under the action of the negative pressure valve, the drainage chamber 30 is negatively pressurized. Under the action of the negative pressure, the drainage net moves toward the aquaculture sludge to promote the drainage function, and can also prevent the drainage net from being blocked under the action of the negative pressure.

[0054] The present invention also includes a discharging system 4, which includes a discharging valve seat. The discharging valve seat includes a first seat body 40 and a second seat body 41. A discharging valve plate 43 is arranged on the inner side of the first seat body 40. After the cleaning shaft 37 passes through the discharging valve plate 43, it is fixedly connected with the second seat body 41 through a bearing seat. A discharging top plate 44 is arranged on the outer side of the second seat body 41. The discharging valve plate 43 and the discharging top plate 44 are connected by a discharging top rod 45. A discharging baffle 46 is arranged on the outer side of the discharging top plate 44. The discharging baffle 46 is fixedly connected with the second seat body 41 by a discharging stop rod 47. A discharging valve spring 48 is arranged on the outer side of the discharging stop rod 47.

[0055] The present invention discharges the dehydrated aquaculture sludge through the discharge valve seat. After the aquaculture sludge accumulates, the discharge valve plate 43 is pushed out under the action of pressure. Under the action of the discharge push rod 45, the discharge valve plate 43 and the discharge top plate 44 move at the same time, and the dehydrated aquaculture sludge is discharged from the outlet. At this time, the discharge valve spring 48 is in a compressed state. When the accumulation degree of the aquaculture sludge is not enough to push the discharge valve plate 43 to move, under the elastic force of the discharge valve spring 48, the discharge valve plate 43 returns to the initial position, and the outlet of the drainage chamber 30 is closed.

[0056] Example 2

[0057] according to Figure 4 As shown, a water receiving frame 34 is provided below the first filter cartridge connection portion 300 of the present invention. The water receiving frame 34 is provided in an arc shape. The water receiving frame 34 and the reinforcing rib 32 are fixedly connected. A drain port 35 is provided at the bottom of the water receiving frame 34. A water collecting box 36 is provided below the drain port 35. The water drained through the drain hole 31 of the present invention is discharged through the water receiving frame 34. The discharged water enters the water collecting box 36 through the drain port 35. After the water in the water collecting box 36 is collected to a certain extent, it is discharged through a pipe.

[0058] The fourth thrust cavity 23 of the present invention is connected to the first filter cartridge connection part 300 at one end by a hinge 6, and the other end is connected by a connection part, the connection part includes a first connection member, the first connection member is arranged on the outside of the first filter cartridge connection part 300, the second connection member is rotatably arranged on the first connection member, a notch is arranged on the outside of the fourth thrust cavity 23, the second connection member is inserted into the notch by rotation, and is fixed by a nut. The present invention can replace the drain net by opening or closing the connection part. After removing the nut and rotating the second connection member, the first filter cartridge connection part 300 can be opened by the hinge 6, and the drain net inside it can be replaced. After the replacement is completed, the second filter cartridge connection part 301 is closed, the second connection member is rotated to insert into the notch, and the nut is screwed in to fix it.

[0059] Example 3

[0060] according to Figure 6 As shown, a cleaning shaft 37 is provided in the drainage chamber 30 of the present invention, and a cleaning body 38 is provided in a spiral shape along the axial direction on the outer side of the cleaning shaft 37, and the cleaning body 38 includes a first cleaning part 380 and a second cleaning part 381. The present invention can promote the movement of the aquaculture sludge in the drainage chamber 30 to prevent accumulation, and can clean the drainage net to prevent impurities from clogging the mesh of the drainage net through the rotation of the cleaning part.

[0061] The present invention puts the aquaculture sludge into the feed box through the feed port, and enters the thrust chamber through the guide box. The thrust column moves to push the aquaculture sludge into the drainage chamber for dehydration. Under the action of the negative pressure valve, the drainage chamber is under negative pressure. The drainage net moves toward the aquaculture sludge under the action of the negative pressure to promote the drainage function. The drainage net can also be prevented from being blocked under the action of the negative pressure. The aquaculture sludge after drainage is taken out through the discharge system, thereby realizing high-efficiency and continuous aquaculture sludge dehydration. If the drainage rate, that is, the moisture content of the discharge material, needs to be adjusted, it can be achieved by adjusting the extension and contraction of the spring.

[0062] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pile-wedge type aquaculture sludge hydraulic dewatering machine, characterized in that: include: A feeding system, comprising a feeding box, wherein the feeding box is provided with a feeding port for feeding aquaculture sludge; A thrust system, comprising a thrust chamber, wherein a thrust column is arranged in the thrust chamber for pushing the aquaculture sludge to move, and a negative pressure valve is arranged at the end of the thrust column; A drainage system, comprising a drainage chamber, wherein the drainage chamber is provided with a plurality of drainage holes, and a drainage net is provided in the drainage chamber for dehydrating the aquaculture sludge; The discharge system comprises a discharge valve seat, and is used to discharge the dehydrated aquaculture sludge through the opening and closing of the discharge valve seat.

2. A pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 1, characterized in that: The top of the feed box is connected with a return pipe, and the bottom of the feed box is connected with a material guide box, and the cross-sectional area of ​​the top end of the material guide box is larger than the cross-sectional area of ​​the bottom end of the material guide box.

3. A pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 1, characterized in that: The push chamber comprises: A first thrust cavity is provided with a piston rod, a piston is provided at the rear end of the piston rod, and a first sealing ring is provided at the head end of the piston rod; The second thrust cavity is provided with a squeezing rod, the tail end of the squeezing rod is connected to the piston rod through a squeezing nut, the head end of the squeezing rod is provided with a negative pressure valve, and the second thrust cavity is provided with an oblique pressure relief hole; A third thrust cavity is connected to the bottom of the feed box; The fourth thrust cavity has a longitudinal cross-sectional area that gradually increases from an end close to the third thrust cavity to an end far away from the third thrust cavity; The first thrust chamber, the second thrust chamber, the third thrust chamber and the fourth thrust chamber are connected in sequence by bolts.

4. A pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 3, characterized in that: The drainage chamber includes a first filter cartridge connecting part and a second filter cartridge connecting part that are integrally connected, the longitudinal cross-sectional area of ​​the second filter cartridge connecting part close to one end of the first filter cartridge connecting part is larger than the longitudinal cross-sectional area of ​​the end away from the first filter cartridge connecting part, the drainage net is arranged on the inner side of the first filter cartridge connecting part, and a plurality of reinforcing ribs are arranged on the outside of the first filter cartridge connecting part, and the plurality of reinforcing ribs are connected by longitudinal ribs.

5. A pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 4, characterized in that: A water receiving frame is arranged below the first filter cartridge connection portion, the water receiving frame is arranged in an arc shape, the water receiving frame and the reinforcing ribs are fixedly connected, a drain outlet is arranged at the bottom end of the water receiving frame, and a water collecting tank is arranged below the drain outlet.

6. A pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 4, characterized in that: The drainage chamber is provided with a cleaning shaft, and the outer side of the cleaning shaft is provided with a cleaning body which is spirally arranged along the axial direction, and the cleaning body includes a first cleaning part and a second cleaning part.

7. The pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 4, characterized in that: The fourth thrust cavity and the first filter cartridge connecting part are connected by a hinge at one end and connected by a connecting part at the other end. The connecting part includes a first connecting member, which is arranged on the outer side of the first filter cartridge connecting part. A second connecting member is rotatably arranged on the first connecting member. A notch is arranged on the outer side of the fourth thrust cavity. The second connecting member is inserted into the notch by rotation and is fixed by a nut.

8. The pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 6, characterized in that: The discharge valve seat includes a first seat body and a second seat body, a discharge valve plate is arranged inside the first seat body, after the cleaning shaft passes through the discharge valve plate, it is fixedly connected between the bearing seat and the second seat body, a discharge top plate is arranged outside the second seat body, the discharge valve plate and the discharge top plate are connected by a discharge top rod, a discharge baffle is arranged outside the discharge top plate, the discharge baffle and the second seat body are fixedly connected by a discharge gear rod, a discharge valve spring is arranged outside the discharge gear rod, and the extensibility of the discharge valve spring can be adjusted to control the squeezing pressure of the drainage chamber to obtain different discharge moisture contents.

9. The pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 3, characterized in that: The negative pressure valve comprises a negative pressure core shaft, a negative pressure valve seat is arranged between the negative pressure core shaft and the second thrust cavity, a negative pressure baffle is arranged at the tail end of the negative pressure core shaft, and a negative pressure spring is arranged on the outside of the negative pressure core shaft.

10. A pile-wedge type aquaculture sludge hydraulic dewatering machine according to claim 9, characterized in that: The negative pressure core shaft includes a first core shaft connecting portion, which passes through the negative pressure valve seat, the negative pressure baffle is arranged at the tail end of the first core shaft connecting portion, the negative pressure spring is arranged between the negative pressure baffle and the negative pressure valve seat, a second core shaft connecting portion is arranged at the head end of the first core shaft connecting portion, and a second sealing ring is arranged between the second core shaft connecting portion and the negative pressure valve seat.

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