Sludge drying pretreatment tank

Abstract

The utility model discloses a sludge drying pretreatment tank which comprises a treatment tank, a discharge device is mounted on one side of the treatment tank, an on-off device is mounted on one side of the treatment tank, and the on-off device comprises a fixed pipe, a rotary sleeve, a fixed rod, a linkage spring, a linkage frame, an inner threaded sleeve, an outer threaded sleeve, a connecting rod, an input pipe, a connecting frame, an end block and a sealing plate. The multiple fixing rods are installed in the fixing pipe, the end blocks are connected with the fixing rods through the connecting rods, the linkage springs are connected with the sealing plate and the linkage frame, the inner threaded sleeve is arranged on the inner side of the rotating sleeve, the outer threaded sleeve is fixedly installed on the linkage frame, the sealing plate is movably arranged on one side of the connecting frame, and the locking mechanism is arranged on the outer side of the input pipe. The locking mechanism comprises a clamping sleeve, a clamping block, a clamping spring, a movable hole, a movable groove, a movable plate, a pushing plate, a pushing rod and a positioning block, the clamping spring is connected with the clamping block, the movable hole is formed in one end of the movable groove, layered discharge is achieved, switching of the on-off state of a pipeline is achieved, and structural stability is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of sludge drying pretreatment technology, and more specifically, it relates to a sludge drying pretreatment tank. Background Technology

[0002] In the current field of sludge treatment technology, sludge sedimentation tank drainage systems have many technical defects and application limitations. Traditional single-pipe drainage designs face serious technical bottlenecks: when using a single inlet pipe at a fixed height for sewage pumping, engineers often find themselves in a dilemma. If the inlet is placed at a high position, a large amount of sewage at the bottom of the tank cannot be effectively discharged, resulting in water waste and increased burden on subsequent treatment. If the inlet is placed at a low position, the settled sludge particles are very likely to clog the pipe, which not only hinders the normal drainage function but also causes a chain reaction of problems such as pump damage and increased energy consumption, greatly reducing the system's operating efficiency and economy in actual industrial applications.

[0003] To address the aforementioned issues, some manufacturers in the industry have attempted to improve the situation by implementing a multi-pipe drainage system with a highly gradient distribution. However, this design still suffers from serious flaws: its structure is overly simplistic, lacks a sophisticated control mechanism, and cannot flexibly adjust the working status of each pipe according to the actual sedimentation conditions. The system neither supports independent operation of a single pipe nor can it achieve collaborative operation of multiple pipes, resulting in a rigid drainage method with poor adaptability. More seriously, if the lower-positioned inlet pipe is not individually controlled for on / off switching, it is highly prone to blockage. Once a blockage occurs, a significant amount of manpower and resources are required for unblocking and maintenance, greatly increasing the maintenance costs and operational risks of the equipment.

[0004] More advanced technical solutions attempt to equip each pipe with a controllable one-way sealing device to selectively open or close pipes at different heights. However, such improved designs still have the fatal flaw of insufficient structural stability: in actual industrial environments, sewage treatment systems are usually operating under high load and high flow rate conditions, with frequent turbulent impact forces and equipment vibrations within the pipes. These mechanical factors are transmitted to the on / off device through the pipe wall material, causing the adjusted structure to gradually loosen, shift, or even fail. Once the sealing device malfunctions, it will not only cause sludge to be mistakenly sucked into the upper pipes, polluting the quality of the clean water effluent, but may also trigger a chain of failures such as pump system overload and motor damage. Ultimately, this leads to unstable equipment operation, shortened maintenance cycles, and increased operating costs, severely restricting the industrial application and promotion of sludge treatment equipment. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a sludge drying pretreatment tank to solve the technical problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a sludge drying pretreatment tank, comprising a treatment tank, a discharge device installed on one side of the treatment tank, and a switching device installed on the other side of the treatment tank. The switching device includes a fixed pipe, a rotating sleeve, a fixed rod, a linkage spring, a linkage frame, an inner threaded sleeve, an outer threaded sleeve, a connecting rod, an input pipe, a connecting frame, an end block, and a sealing plate. The fixed pipe is fixedly connected to the input end of the connecting chamber. The two ends of the rotating sleeve are rotatably connected to the input pipe and the fixed pipe, respectively. Multiple fixed rods are fixedly installed inside the fixed pipe. The end block is connected to the fixed rod via the connecting rod. The two ends of the linkage spring are connected to the sealing plate and the linkage frame, respectively. The inner threaded sleeve is fixedly disposed inside the rotating sleeve, and the outer threaded sleeve is fixedly installed on the linkage frame. The inner wall is movably connected to the outer wall of the outer threaded sleeve via threads. The connecting frame is fixedly installed inside the input pipe. The sealing plate is movably installed on one side of the connecting frame. A locking mechanism is provided on the outside of the input pipe. The locking mechanism includes a clamping sleeve, a clamping block, a clamping spring, a movable hole, a movable groove, a movable plate, a push plate, a push rod, and a positioning block. The clamping sleeve is slidably sleeved on the outside of the input pipe. The clamping block is movably installed on one side of the rotating sleeve. The two ends of the clamping spring are respectively connected to two adjacent clamping blocks. The movable hole is opened at one end of the movable groove. The movable groove is opened on the movable plate. The movable plate is rotatably installed on the outside of the input pipe. Two push plates are fixedly installed on the push rod. The push rod is fixedly connected to one side of the clamping sleeve. Multiple positioning blocks are fixedly installed on the outside of the input pipe.

[0009] The present invention is further configured such that the discharge device includes a connecting chamber and a connecting pipe, the input pipe is fixedly connected to one side of the connecting chamber, multiple input pipes are arranged on one side of the connecting chamber, and the other end of the input pipe extends into the treatment tank. Through the integrated design of multiple input pipes and the connecting chamber, selective discharge of sludge layers at different depths is achieved. The optimal suction position can be automatically matched according to the sedimentation height to ensure efficient separation of the upper clear liquid, while avoiding disturbance to the bottom sludge layer.

[0010] The present invention is further configured such that the multiple input pipes have different lengths. This arrangement of input pipes with varying lengths allows the equipment to adapt to the needs of different sedimentation conditions. By selecting suction points at different depths, the mixed suction problem caused by traditional single suction pipes is effectively solved, and the sludge stratification treatment effect is significantly improved.

[0011] The present invention is further configured such that a push spring is sleeved on the outer side of the push rod, the push spring is connected to one side of the clamping sleeve, and the other end of the push spring is in contact with the movable plate. The elastic reset design of the push spring not only ensures the reliable locking of the clamping sleeve, but also realizes the automatic reset function after operation, simplifying the manual operation steps.

[0012] The present invention is further configured such that a clamping rail is fixedly provided on one side of the rotating sleeve, and a clamping groove is provided on one side of the clamping block. The clamping groove is adapted to the clamping rail. The precise fit structure between the clamping rail and the clamping groove ensures the motion stability during the rotation adjustment process and prevents the clamping block from shifting.

[0013] The present invention is further configured such that a clamping wheel is rotatably provided on one side of the clamping block, and the clamping wheel is engaged between the two positioning blocks. The rolling contact design of the clamping wheel greatly reduces the frictional resistance, allowing it to smoothly engage and disengage between the positioning blocks, which not only ensures positioning accuracy but also improves the convenience of operation.

[0014] The present invention is further configured such that multiple slide rails are fixedly provided on the inner wall of the input pipe, and slide grooves are provided on the outer side of the sealing plate and the linkage frame. The slide grooves are adapted to the slide rails, and the guide cooperation between the slide rails and the slide grooves makes the movement of the sealing mechanism more stable and precise, effectively preventing the sealing element from deflecting during the operation and ensuring the complete fit of the sealing surface.

[0015] The present invention is further configured such that a sealing groove is provided on one side of the connecting frame, and a sealing strip is fixedly provided on one side of the sealing plate. The sealing strip is inserted into the sealing groove. The embedded cooperation structure between the sealing strip and the sealing groove forms multiple sealing defenses, which can ensure complete sealing and eliminate the possibility of media leakage.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a sludge drying pretreatment tank, which has the following beneficial effects:

[0018] 1. The discharge device achieves stratified discharge of the settled sludge layer through a combination design of a connecting chamber and multiple input pipes of different lengths. The connecting chamber, as the core component of negative pressure suction, ensures uniform distribution of suction force through its internal cavity structure. The multiple input pipes of varying lengths can flexibly select the working pipeline according to the sludge settling height. The negative pressure generated by the water pump causes the input pipe in the pass state to automatically open the sealing structure, accurately extracting the upper clear liquid. This selective discharge mechanism effectively avoids the problem of secondary sludge agitation caused by traditional single-pipe discharge, ensuring that the settled sludge layer remains stable. The sliding rail guide system inside the input pipe makes the movement of the sealing plate more stable. With the precise cooperation of the sealing strip and sealing groove, it can automatically restore the sealing state after the pumping is completed, ensuring both discharge efficiency and preventing pipeline leakage.

[0019] 2. The on / off device adopts a threaded linkage mechanism of rotating sleeve and inner and outer threaded sleeves to realize the switching of pipeline on / off states. The fixed pipe serves as the main support, and a stable guide frame is formed by the fixed rod and connecting rod. When the rotating sleeve drives the inner threaded sleeve to rotate, the outer threaded sleeve generates axial displacement under the constraint of the slide rail. This spiral propulsion structure has self-locking characteristics and can accurately control the movement stroke of the linkage frame. The sealing plate and the linkage frame are elastically connected by the linkage spring, and can automatically reset when switching the passage state to ensure complete fit between the sealing strip and the sealing groove. The device can realize the opening and closing of the sealing structure through mechanical transmission only. Its dual-seal design (mechanical seal + elastic seal) significantly improves the sealing reliability and eliminates sewage leakage.

[0020] 3. The locking mechanism, through an innovative clamping wheel positioning system, provides dual protection for rotational adjustment. The sliding assembly consisting of the clamping sleeve and the push rod, combined with the special slot structure of the movable plate, forms a mechanical interlocking device. The T-shaped fit design of the clamping rail and the clamping groove constrains the clamping block both radially and axially. The V-shaped interlocking structure of the clamping wheel and the positioning block forms a stable locking position under the preload of the clamping spring. After angle adjustment, this mechanism can automatically reset the locking sleeve through the push spring, so that the clamping wheel is firmly locked between the positioning blocks. Compared with the traditional method, this mechanism achieves stable locking, eliminates displacement deviation caused by equipment vibration, and its self-locking structure ensures that there will be no accidental loosening due to external force after switching between on and off states, greatly improving the stability and safety of equipment operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a sludge drying pretreatment tank according to the present invention.

[0022] Figure 2 This is a schematic diagram of the overall structure from a second perspective in this utility model;

[0023] Figure 3This is a schematic diagram of the on / off device and locking mechanism in this utility model;

[0024] Figure 4 This is a cross-sectional structural diagram of the switching device and locking mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram showing the distributed cross-sectional structure of the switching device and locking mechanism in this utility model.

[0026] In the diagram: 1. Treatment tank; 2. Fixed pipe; 3. Rotating sleeve; 4. Fixed rod; 5. Linkage spring; 6. Linkage frame; 7. Inner threaded sleeve; 8. Outer threaded sleeve; 9. Connecting rod; 10. Input pipe; 11. Connecting frame; 12. End block; 13. Sealing plate; 14. Clamping sleeve; 15. Clamping block; 16. Clamping spring; 17. Movable hole; 18. Movable groove; 19. Movable plate; 20. Push plate; 21. Push rod; 22. Positioning block; 23. Connecting compartment; 24. Connecting pipe; 25. Push spring; 26. Clamping rail; 27. Clamping groove; 28. Clamping wheel; 29. ​​Slide rail; 30. Slide groove; 31. Sealing groove; 32. Sealing strip. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5A sludge drying pretreatment tank includes a treatment tank 1. A discharge device is installed on one side of the treatment tank 1, and a switching device is installed on the other side of the treatment tank 1. The switching device includes a fixed pipe 2, a rotating sleeve 3, a fixed rod 4, a linkage spring 5, a linkage frame 6, an inner threaded sleeve 7, an outer threaded sleeve 8, a connecting rod 9, an input pipe 10, a connecting frame 11, an end block 12, and a sealing plate 13. The fixed pipe 2 is fixedly connected to the input end of the connecting chamber 23. The two ends of the rotating sleeve 3 are rotatably connected to the input pipe 10 and the fixed pipe 2, respectively. Multiple fixed rods 4 are fixedly installed inside the fixed pipe 2. The end block 12 is connected to the fixed rods 4 through the connecting rod 9. The two ends of the linkage spring 5 are connected to the sealing plate 13 and the linkage frame 6, respectively. The inner threaded sleeve 7 is fixedly disposed inside the rotating sleeve 3, and the outer threaded sleeve 8 is fixedly installed on the linkage frame 6. The inner wall of the inner threaded sleeve 7 is movably connected to the outer wall of the outer threaded sleeve 8 through threads. The connecting frame 11 is fixedly installed inside the input pipe 10. The sealing plate 13 is movably installed on one side of the connecting frame 11. A locking mechanism is provided on the outside of the input pipe 10. The locking mechanism includes a clamping sleeve 14, a clamping block 15, a clamping spring 16, a movable hole 17, a movable groove 18, a movable plate 19, a push plate 20, a push rod 21, and a positioning block 22. The clamping sleeve 14 is slidably sleeved on the outside of the input pipe 10. The clamping block 15 is movably installed on one side of the rotating sleeve 3. The two ends of the clamping spring 16 are respectively connected to two adjacent clamping blocks 15. The movable hole 17 is opened at one end of the movable groove 18. The movable groove 18 is opened on the movable plate 19. The movable plate 19 is rotatably installed on the outside of the input pipe 10. Two push plates 20 are fixedly installed on the push rod 21. The push rod 21 is fixedly connected to one side of the clamping sleeve 14. Multiple positioning blocks 22 are fixedly installed on the outside of the input pipe 10.

[0031] The discharge device includes a connecting chamber 23 and a connecting pipe 24. An input pipe 10 is fixedly connected to one side of the connecting chamber 23. Multiple input pipes 10 are arranged on one side of the connecting chamber 23, and the other end of the input pipe 10 extends into the treatment pool 1.

[0032] The multiple input tubes 10 have different lengths.

[0033] In this embodiment, wastewater containing sludge is first discharged into treatment tank 1 for static sedimentation. After static sedimentation, the sludge settles at the bottom of treatment tank 1, while the wastewater floats above the sludge, resulting in stratification. Then, based on the highest height of the sludge, the input pipe 10, whose inlet is lower than the sludge layer, is switched to an open circuit state. The water pump connected to the connecting pipe 24 is then turned on, and water is pumped out. The water pump creates a negative pressure state in the connecting chamber 23. The sealing plate 13 installed in the input pipe 10, which is in the open circuit state, slides to one side, causing the sealing plate 13 to pull the sealing strip 32 installed on one side out of the sealing groove 31 opened on one side of the connecting frame 11. Then, the sealing plate 13 will slide along the slide rail 29 and the slide groove 30, and cooperate with the linkage frame 6 to squeeze the linkage spring 5. Then, the sealing plate 13 will move to the outside of the connecting rod 9, so that the sealing plate 13, the end block 12 and the connecting frame 11 no longer cooperate to form a seal. Then, the sewage is sucked in through the inlet pipe 10 in the passage state, and then enters the connecting chamber 23. It is transported to the next process through the connecting pipe 24. Finally, the external water pump is turned off, the air pressure returns to normal, and then the linkage spring 5 pushes the sealing plate 13 to slide and reset along the slide rail 29 and the slide groove 30. Then, the sealing plate 13 drives the sealing strip 32 set on one side to re-clamp into the sealing groove 31, and re-form the sealing relationship.

[0034] Please see Figures 3-5 As a further implementation of the overall equipment: a push spring 25 is sleeved on the outside of the push rod 21, the push spring 25 is connected to one side of the clamping sleeve 14, and the other end of the push spring 25 is in contact with the movable plate 19.

[0035] A clamping rail 26 is fixedly provided on one side of the rotating sleeve 3, and a clamping groove 27 is provided on one side of the clamping block 15. The clamping groove 27 is adapted to the clamping rail 26.

[0036] A clamping wheel 28 is provided on one side of the clamping block 15, which is rotated and engages between the two positioning blocks 22.

[0037] Multiple slide rails 29 are fixedly provided on the inner wall of the input pipe 10, and a slide groove 30 is provided on the outer side of the sealing plate 13 and the linkage frame 6. The slide groove 30 is adapted to the slide rail 29.

[0038] A sealing groove 31 is provided on one side of the connecting frame 11, and a sealing strip 32 is fixedly provided on one side of the sealing plate 13. The sealing strip 32 is inserted into the sealing groove 31.

[0039] More specifically, when it is necessary to change the on / off state of the corresponding input pipe 10, firstly, rotate the movable plate 19 clockwise, causing the movable plate 19 to drive the movable hole 17 and the movable groove 18 to rotate clockwise. When the movable hole 17 rotates to a position concentric with the push plate 20 and the push rod 21, it pushes the locking sleeve 14, causing the locking sleeve 14 to drive the push rod 21 and the two push plates 20 to gradually slide through the movable hole 17. The locking sleeve 14 will cooperate with the movable plate 19 to compress the movable spring. When the movable spring is compressed to its limit, the push plate 20 near the locking sleeve 14 just passes through the movable hole 17 and moves to the other side of the movable plate 19. Then, rotate the sealing plate 13 counterclockwise, causing the sealing plate 13 to drive the movable hole 17 and the movable groove 18 to rotate counterclockwise, causing the push rod 21 and the two push plates 20 to gradually slide through the movable hole 17. The locking sleeve 14 will cooperate with the movable plate 19 to compress the movable spring. When the movable spring is compressed to its limit, the push plate 20 near the locking sleeve 14 will just pass through the movable hole 17 and move to the other side of the movable plate 19. Then, rotate the sealing plate 13 counterclockwise, causing the sealing plate 13 to drive the movable hole 17 and the movable groove 18 to rotate counterclockwise, causing the push rod 21 and the two push plates 20 to gradually slide through the movable hole 17. The locking sleeve 14 will cooperate with the movable plate 19 to compress the movable spring. Rod 21 enters the movable groove 18, and then the push rod 21, in conjunction with a push plate 20 near the clamping sleeve 14, limits the clamping sleeve 14 to one side of the movable plate 19. Then the clamping sleeve 14 no longer limits the outer side of the clamping wheel 28, and then the rotating sleeve 3 rotates forward. The rotating sleeve 3 will drive multiple clamping rails 26 on one side to rotate forward. Then the clamping rails 26 will drive the clamping block 15 to rotate through the clamping groove 27. Then the clamping block 15 will drive the clamping wheel 28 to roll out between the two positioning blocks 22. Then the clamping wheel 28 will drive the clamping block 15 to slide outward along the clamping rails 26 and the clamping groove 27, so that the clamping block 15 drives the clamping spring 16 to stretch. At the same time, the rotating sleeve 3 will drive the inner threaded sleeve 7 on the inner side to rotate forward. The inner wall of the 7th threaded sleeve and the outer wall of the outer threaded sleeve 8 are connected by threads. The slide rail 29 and the slide groove 30 cooperate to limit the movement of the outer threaded sleeve 8. Then the outer threaded sleeve 8 will slide along the slide rail 29 and the slide groove 30, causing the outer threaded sleeve 8 to drive the linkage frame 6 at one end to slide along the connecting rod 9. Then the distance between the linkage frame 6 and the sealing plate 13 will decrease, causing the linkage frame 6 and the sealing plate 13 to gradually compress the linkage spring 5 until the linkage spring 5 is completely compressed. At this time, the sealing plate 13 cannot move, making the input pipe 10 in an open state. When it is necessary to switch the corresponding input end to the open state, simply rotate the rotating sleeve 3 in the opposite direction. Then stop rotating the rotating sleeve 3. At this time, the clamping rail 26 and the clamping groove 27 cooperate to drive the clamping block 15 to the corresponding two fixed positions. Between the positioning blocks 22, the clamping spring 16 resets and pulls the clamping block 15 to slide inward along the clamping rail 26 and clamping groove 27, and the clamping block 15 will drive the clamping wheel 28 on one side to engage between the corresponding two positioning blocks 22. Then, the movable plate 19 is rotated forward again, so that the movable plate 19 drives the movable hole 17 and movable groove 18 to rotate forward again. When the movable plate 19 rotates to the position concentric with the push plate 20 and the push rod 21, the push spring 25 pushes the clamping sleeve 14 to slide and reset, so that the clamping sleeve 14 drives the two push plates 20 to slide and reset through the push rod 21. When the push spring 25 is fully reset, the push plate 20 set at the top of the push rod 21 moves to the original side of the movable plate 19, and then the movable plate 19 is rotated again.This causes the movable plate 19 to rotate and reset the movable hole 17 and movable groove 18 to a position that does not correspond to the push rod 21 and push plate 20. Then, the push rod 21, in conjunction with the top push plate 20, is secured to one side of the movable plate 19 by the clamping sleeve 14. The inner wall of the clamping sleeve 14 then limits the outer side of the clamping wheel 28, preventing the clamping wheel 28 and clamping block 15 from moving outwards. This achieves rotational limitation of the rotating sleeve 3, ensuring the stability of the equipment and preventing structural loosening or displacement.

[0040] In summary, during the use or operation of the overall equipment: First, wastewater containing sludge is discharged into treatment tank 1 for static sedimentation. After static sedimentation, the sludge settles at the bottom of treatment tank 1, while the wastewater floats above the sludge, resulting in stratification. Then, based on the highest sludge level, the inlet pipe 10, which is lower than the sludge layer, is switched to an open circuit state. Next, the external water pump connected to the connecting pipe 24 is turned on, and water is pumped out. The water pump creates a negative pressure in the connecting chamber 23. The sealing plate 13 installed inside the open inlet pipe 10 then slides to one side, causing the sealing plate 13 to pull the sealing strip 32 on one side through the sealing groove 3 on one side of the connecting frame 11. The sealing plate 13 is pulled out from the slide rail 29 and the slide groove 30, and cooperates with the linkage frame 6 to squeeze the linkage spring 5. Then the sealing plate 13 moves to the outside of the connecting rod 9, so that the sealing plate 13, the end block 12 and the connecting frame 11 no longer cooperate to form a seal. Then the sewage is sucked in through the inlet pipe 10 in the passage state and enters the connecting chamber 23. It is then transported to the next process through the connecting pipe 24. Finally, the external water pump is turned off, the air pressure returns to normal, and then the linkage spring 5 pushes the sealing plate 13 to slide and reset along the slide rail 29 and the slide groove 30. Then the sealing plate 13 drives the sealing strip 32 set on one side to re-clamp into the sealing groove 31, and re-form the sealing relationship.

[0041] When it is necessary to change the on / off state of the corresponding input pipe 10, first rotate the movable plate 19 clockwise, causing the movable plate 19 to drive the movable hole 17 and the movable groove 18 to rotate clockwise. When the movable hole 17 rotates to a position concentric with the push plate 20 and the push rod 21, it pushes the locking sleeve 14, causing the locking sleeve 14 to drive the push rod 21 and the two push plates 20 to gradually slide through the movable hole 17. The locking sleeve 14 will cooperate with the movable plate 19 to compress the movable spring. When the movable spring is compressed to its limit, the push plate 20 near the locking sleeve 14 just passes through the movable hole 17 and moves to the other side of the movable plate 19. Then, rotate the sealing plate 13 counterclockwise, causing the sealing plate 13 to drive the movable hole 17 and the movable groove 18 to rotate counterclockwise, causing the push rod 21 to enter... The sleeve 14 is inserted into the movable groove 18. Then, the push rod 21, in conjunction with the push plate 20 near the clamping sleeve 14, limits the clamping sleeve 14 to one side of the movable plate 19. Then, the clamping sleeve 14 no longer limits the outer side of the clamping wheel 28. Then, the rotating sleeve 3 rotates forward. The rotating sleeve 3 will drive the multiple clamping rails 26 on one side to rotate forward. Then, the clamping rails 26 will drive the clamping block 15 to rotate through the clamping groove 27. Then, the clamping block 15 will drive the clamping wheel 28 to roll out between the two positioning blocks 22. Then, the clamping wheel 28 will drive the clamping block 15 to slide outward along the clamping rails 26 and the clamping groove 27, so that the clamping block 15 drives the clamping spring 16 to stretch. At the same time, the rotating sleeve 3 will drive the inner threaded sleeve 7 on the inner side to rotate forward. Due to the inner wall of the inner threaded sleeve 7... The outer threaded sleeve 8 is connected to the outer wall of the external threaded sleeve 8 by threads, and the slide rail 29 and slide groove 30 cooperate to limit the movement of the external threaded sleeve 8. Then the external threaded sleeve 8 will slide along the slide rail 29 and slide groove 30, causing the external threaded sleeve 8 to drive the linkage frame 6 at one end to slide along the connecting rod 9. Then the distance between the linkage frame 6 and the sealing plate 13 will decrease, so that the linkage frame 6 and the sealing plate 13 will gradually compress the linkage spring 5 until the linkage spring 5 is completely compressed. At this time, the sealing plate 13 cannot move, so the input pipe 10 is in a broken state. When it is necessary to switch the corresponding input end to the open state, simply rotate the rotating sleeve 3 in the opposite direction, and then stop rotating the rotating sleeve 3. At this time, the clamping rail 26 and clamping groove 27 cooperate to drive the clamping block 15 to the corresponding two positioning blocks. Between 22, the clamping spring 16 resets and pulls the clamping block 15 to slide inward along the clamping rail 26 and clamping groove 27, and the clamping block 15 will drive the clamping wheel 28 on one side to engage between the corresponding two positioning blocks 22. Then, the movable plate 19 is rotated forward again, so that the movable plate 19 drives the movable hole 17 and movable groove 18 to rotate forward again. When the movable plate 19 rotates to the position concentric with the push plate 20 and push rod 21, the push spring 25 pushes the clamping sleeve 14 to slide and reset, so that the clamping sleeve 14 drives the two push plates 20 to slide and reset through the push rod 21. When the push spring 25 is fully reset, the push plate 20 set at the top of the push rod 21 moves to the original side of the movable plate 19, and then the movable plate 19 is rotated again.This causes the movable plate 19 to rotate and reset the movable hole 17 and movable groove 18 to a position that does not correspond to the push rod 21 and push plate 20. Then, the push rod 21, in conjunction with the top push plate 20, is secured to one side of the movable plate 19 by the clamping sleeve 14. The inner wall of the clamping sleeve 14 then limits the outer side of the clamping wheel 28, preventing the clamping wheel 28 and clamping block 15 from moving outwards. This achieves rotational limitation of the rotating sleeve 3, ensuring the stability of the equipment and preventing structural loosening or displacement.

[0042] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sludge drying pretreatment tank, comprising a treatment tank (1), characterized in that: A discharge device is installed on one side of the treatment tank (1), and a switching device is installed on the other side of the treatment tank (1). The switching device includes a fixed pipe (2), a rotating sleeve (3), a fixed rod (4), a linkage spring (5), a linkage frame (6), an inner threaded sleeve (7), an outer threaded sleeve (8), a connecting rod (9), an input pipe (10), a connecting frame (11), an end block (12), and a sealing plate (13). Multiple fixed rods (4) are installed inside the fixed pipe (2). The end block (12) is connected to the fixed rod (4) through the connecting rod (9). The linkage spring (5) is connected to the sealing plate (13) and the linkage frame (6). The inner threaded sleeve (7) is located inside the rotating sleeve (3). The outer threaded sleeve (8) is fixedly installed on the linkage frame (6). The sealing plate (13) is located inside the rotating sleeve (3). The movable part is set on one side of the connecting frame (11), and a locking mechanism is set on the outside of the input pipe (10). The locking mechanism includes a clamping sleeve (14), a clamping block (15), a clamping spring (16), a movable hole (17), a movable groove (18), a movable plate (19), a push plate (20), a push rod (21), and a positioning block (22). The clamping spring (16) is connected to two adjacent clamping blocks (15). The movable hole (17) is opened at one end of the movable groove (18). The movable groove (18) is opened on the movable plate (19). Two push plates (20) are set on the push rod (21). The push rod (21) is connected to one side of the clamping sleeve (14). Multiple positioning blocks (22) are set on the outside of the input pipe (10).

2. The sludge drying pretreatment tank according to claim 1, characterized in that: The discharge device includes a connecting chamber (23) and a connecting pipe (24). The input pipe (10) is fixedly connected to one side of the connecting chamber (23). Multiple input pipes (10) are arranged on one side of the connecting chamber (23), and the other end of the input pipe (10) extends into the treatment pool (1).

3. The sludge drying pretreatment tank according to claim 2, characterized in that: The lengths of the multiple input tubes (10) are all different.

4. A sludge drying pretreatment tank according to any one of claims 1-3, characterized in that: The push rod (21) is fitted with a push spring (25) on the outside. The push spring (25) is connected to one side of the clamping sleeve (14). The other end of the push spring (25) is in contact with the movable plate (19).

5. A sludge drying pretreatment tank according to claim 4, characterized in that: The rotating sleeve (3) is fixedly provided with a clamping rail (26) on one side, and the clamping block (15) is provided with a clamping groove (27) on one side, and the clamping groove (27) is adapted to the clamping rail (26).

6. The sludge drying pretreatment tank according to claim 5, characterized in that: The clamping block (15) has a clamping wheel (28) on one side that rotates, and the clamping wheel (28) is engaged between the two positioning blocks (22).

7. A sludge drying pretreatment tank according to claim 1, characterized in that: The inner wall of the input pipe (10) is fixed with multiple slide rails (29), and the outer side of the sealing plate (13) and the linkage frame (6) is provided with a slide groove (30), which is adapted to the slide rail (29).

8. A sludge drying pretreatment tank according to claim 7, characterized in that: A sealing groove (31) is provided on one side of the connecting frame (11), and a sealing strip (32) is fixedly provided on one side of the sealing plate (13), and the sealing strip (32) is inserted into the sealing groove (31).

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