Workpiece cleaning and degreasing integrated device with transverse and longitudinal spiral assistance

Abstract

The application discloses a workpiece oil removal and cleaning integrated equipment with transverse and longitudinal spiral assistance, which comprises a decontamination mechanism, the decontamination mechanism comprises a cleaning unit, an alkali degreasing tank and an electrolytic polishing tank, supports are arranged on the two sides of the decontamination mechanism, a top support is arranged at the top of the supports, a moving plate is slidably arranged in the inside of the top support, a driving motor is arranged at the top of the moving plate, a gear is connected to the output end of the driving motor through a shaft coupling, a toothed rail is arranged at the top of the top support, the gear is meshed with the toothed rail on one side, a winding roller is rotatably arranged at the top of the moving plate, a servo motor is arranged at one end of the winding roller, a fixed guide rail is arranged at the bottom of the moving plate, a lifting appliance mechanism is slidably arranged on one side of the fixed guide rail, and a lifting cable is wound on the surface of the servo motor. The application effectively reduces the processing procedure of the workpiece, reduces the labor consumption, improves the work efficiency, and guarantees the cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of workpiece cleaning technology, specifically to an integrated device for workpiece degreasing and cleaning with transverse and longitudinal spiral assistance. Background Technology

[0002] During metal workpiece machining, auxiliary materials such as cutting fluids, coolants, or lubricating oils are commonly used. These materials may adhere to the surface of the metal workpiece, forming oil stains. During coating, these stains can hinder the adhesion between the paint and the metal surface, leading to coating peeling or poor adhesion. Cleaning can remove surface oil stains, ensuring that the paint adheres firmly to the metal, improving coating adhesion and durability. It can also remove surface impurities and contaminants, ensuring the metal surface meets required purity standards. This is especially important in industrial fields with very high surface finish requirements. Furthermore, it can reduce the risk of corrosion and oxidation, extending the service life of the metal workpiece.

[0003] Current metal workpiece surface cleaning methods involve multiple steps, such as initial cleaning with an aqueous solution followed by further chemical cleaning or mechanical cleaning. This requires workers to transfer the workpiece between two or more cleaning steps, increasing labor costs and reducing cleaning efficiency. Furthermore, the transfer process may cause secondary contamination of the workpiece, and the cleaning solution on the workpiece surface may drip and pollute the working environment, further reducing the cleaning effect. Therefore, a new integrated workpiece degreasing and cleaning device with transverse and longitudinal spiral assistance is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated oil removal and cleaning device for workpieces with transverse and longitudinal spiral assistance, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a decontamination mechanism comprising a cleaning unit, an alkaline degreasing tank, and an electrolytic polishing tank. Supports are connected to both sides of the decontamination mechanism, and a top frame is connected to the top of each support. A movable plate is slidably mounted on the inner side of the top frame. A drive motor is connected to the top of the movable plate, and a gear is connected to the output end of the drive motor via a coupling. A geared track is connected to the top of the top frame, and one side of the gear meshes with the geared track. A take-up roller is rotatably mounted on the top of the movable plate, and one end of the take-up roller is connected to... The servo motor has a fixed guide rail connected to the bottom of the moving plate. A lifting mechanism is slidably mounted on one side of the fixed guide rail. A lifting cable is wound around the surface of the servo motor. Workpiece lifting devices are connected to both sides of the lifting mechanism. Limit seats are connected to the top of the cleaning unit, the alkaline degreasing tank, and the electrolytic polishing tank. A sludge storage box is connected to one side of the cleaning unit and the alkaline degreasing tank. An ultrasonic generator is connected to the bottom of the inner wall of the cleaning unit and the alkaline degreasing tank. Electric heating devices are connected to both sides of the inner wall of the alkaline degreasing tank. A reinforcing frame is connected between the supports.

[0006] The cleaning unit includes a clean water tank, a circulating water pump connected to one side of the clean water tank, a T-pipe connected to the outlet of the circulating water pump, pipe supports connected to both ends of the T-pipe, one end of the pipe supports fixedly installed on both sides of the top of the clean water tank, close to each other with nozzles connected to one side, and an inlet pipe connected to the inlet of the circulating water pump, one end of the inlet pipe extending through into the clean water tank.

[0007] The electrolytic polishing tank includes an insulating tank body. Insulating ceramic frames are connected to both sides of the top of the insulating tank body. Electrode frames are connected to the sides of the insulating ceramic frames that are close to each other. Multiple sets of negative conductors are connected to the middle of the electrode frames. A terminal block is connected to the top of the insulating tank body. A negative conductor is connected to one end of the electrode frames. A positive conductor is connected to one side of the terminal block. The positive and negative conductors are connected to the same power supply device at one end.

[0008] Preferably, protective covers are connected to the top of both the power supply device and the top of the insulating pool.

[0009] Preferably, a reinforcing rib is provided between the top of the fixed guide rail and the moving plate, and a connecting frame is provided on one side. The side of the fixed guide rail away from the connecting frame is slidably connected to the lifting mechanism.

[0010] Preferably, the lifting mechanism includes a hollow steel frame, with triangular brackets connected to both ends of the hollow steel frame, a traction wheel rotatably mounted on the top of the hollow steel frame, and a connecting slide rail connected to one side of the hollow steel frame.

[0011] Preferably, a support frame is connected to the top of the hollow steel frame, the traction wheel is rotatably mounted on one side of the support frame, one end of the sling passes through the moving plate, passes around the traction wheel, and is fixedly mounted at the bottom of the moving plate, and the two sides of the triangular bracket are fitted with the workpiece lifting device.

[0012] Preferably, the workpiece lifting device includes a crossbeam, with hangers connected to both sides of the crossbeam, and a fixed seat connected to the top of each hanger. A bracket is connected to one side of each fixed seat that is close to the other. Multiple sets of U-shaped steel frames are connected to both sides of the crossbeam. A hanging plate is connected to one side of each U-shaped steel frame, and a suspension screw is connected to one side of each hanging plate. A limit threaded cylinder is connected to one end of each suspension screw, and a slot is provided at the bottom of the bracket corresponding to the triangular bracket.

[0013] Preferably, multiple positioning frames are connected to one side of the crossbeam, and a connecting rod is connected to one side of the positioning frame, with one end of the connecting rod connected to a corresponding hanging plate. Positioning clips are connected to both ends of the crossbeam.

[0014] Preferably, the sludge storage box has a sludge inlet on one side, and a baffle is connected to the sludge inlet on the other side.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention uses a drive motor to drive a gear, which in turn moves a moving plate through meshing with a gear rail. This positions the workpiece hoist directly above the cleaning unit. The workpiece is then hung on one end of a suspension screw, and a limiting screw cylinder is rotated for positioning and fixation. A servo motor starts, driving a take-up roller to release the hoisting cable. As the cable is released, the hoisting mechanism is lowered along a fixed guide rail via a traction wheel, immersing the workpiece in a clean water tank for cleaning. Simultaneously, an ultrasonic generator is activated to generate ultrasonic waves for further cleaning. The workpiece is then lifted by the hoist and moved above an alkaline degreasing tank. The hoist is then lowered, immersing the workpiece in an alkaline solution to remove oil and stains. An electric heating device provides heat to ensure effective treatment. Finally, the workpiece is lifted and moved above an electrolytic polishing tank and lowered, immersing it in the electrolyte within an insulating tank. Electrolytic polishing polishes the workpiece surface, effectively reducing processing steps, minimizing labor costs, improving work efficiency, and ensuring cleaning results.

[0017] 2. This invention also drives a gear through a drive motor, which meshes with the gear rail to move the moving plate laterally. A servo motor drives the take-up roller to rotate, controlling the raising and lowering of the sling, thereby controlling the up and down movement of the lifting mechanism. This completes the lifting and lowering of the workpiece, facilitating workpiece operation, meeting usage requirements, and providing simple, convenient, and stable operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the integrated oil removal and cleaning device for workpieces with transverse and longitudinal spiral assistance according to the present invention;

[0019] Figure 2 This is a front view structural diagram of the integrated workpiece degreasing and cleaning device with transverse and longitudinal spiral assistance according to the present invention;

[0020] Figure 3 for Figure 1 Enlarged structural diagram of section A;

[0021] Figure 4 This is a schematic diagram of the overall structure of the decontamination mechanism in the integrated workpiece degreasing and cleaning device with transverse and longitudinal spiral assistance of the present invention.

[0022] Figure 5 This is a side sectional view of the decontamination mechanism in the integrated oil removal and cleaning device with transverse and longitudinal spiral assistance of the present invention.

[0023] Figure 6 This is a schematic diagram of the workpiece lifting device in the integrated workpiece degreasing and cleaning equipment with transverse and longitudinal spiral assistance of the present invention;

[0024] Figure 7 This is a schematic diagram of the connection structure of the fixed guide rail and the lifting mechanism in the integrated workpiece degreasing and cleaning equipment with transverse and longitudinal spiral assistance of the present invention.

[0025] In the diagram: 111. Decontamination mechanism; 1. Cleaning unit; 101. Clean water tank; 102. Circulating water pump; 103. T-pipe; 104. Pipe rack; 105. Nozzle; 106. Inlet pipe; 2. Alkali degreasing tank; 21. Electric heating device; 3. Electrolytic polishing tank; 301. Insulating tank body; 302. Insulating ceramic frame; 303. Electrode frame; 304. Negative conductor; 305. Terminal block; 306. Negative wire; 307. Positive wire; 308. Power supply device; 4. Support frame; 5. Top frame; 6. Moving plate; 7. Drive motor; 8. Gear; 9. Gear rail; 10. Take-up roller; 11. Servo motor; 12. Fixed guide rail; 13. Lifting mechanism; 131. Hollow steel frame; 132. Triangular bracket; 133. Traction wheel; 134. Connecting slide rail; 14. Lifting sling; 15. Workpiece lifting device; 151. Crossbeam; 152. Hanger; 153. Fixed seat; 154. Bracket; 155. U-shaped steel frame; 156. Hanging plate; 157. Suspension screw; 158. Limiting threaded cylinder; 159. Positioning frame; 150. Positioning chuck; 16. Limiting seat; 18. Sewage storage box; 19. Ultrasonic generator; 20. Baffle; 22. Reinforcing frame; 24. Reinforcing rib. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-7 This invention provides a technical solution comprising a decontamination mechanism 111, which includes a cleaning unit 1, an alkaline degreasing tank 2, and an electrolytic polishing tank 3. Supports 4 are connected to both sides of the decontamination mechanism 111, and a top frame 5 is connected to the top of the support 4. A movable plate 6 is slidably mounted inside the top frame 5. A drive motor 7 is connected to the top of the movable plate 6, and a gear 8 is connected to the output end of the drive motor 7 via a coupling. A gear rail 9 is connected to the top of the top frame 5, and one side of the gear 8 meshes with the gear rail 9. A take-up roller 10 is rotatably mounted on the top of the movable plate 6, and a servo motor 11 is connected to one end of the take-up roller 10. A fixed guide rail 12 is connected to the bottom of the movable plate 6. A lifting mechanism 13 is slidably installed on one side of the fixed guide rail 12. A sling 14 is wound around the surface of the servo motor 11. Workpiece lifting devices 15 are connected to both sides of the lifting mechanism 13. Limit seats 16 are connected to the top of the cleaning unit 1, the alkaline degreasing tank 2, and the electrolytic polishing tank 3. A sludge storage box 18 is connected to one side of the cleaning unit 1 and the alkaline degreasing tank 2. An ultrasonic generator 19 is connected to the bottom of the inner wall of the cleaning unit 1 and the alkaline degreasing tank 2. An electric heating device 21 is connected to both sides of the inner wall of the alkaline degreasing tank 2. A reinforcing frame 22 is connected between the supports 4 to ensure the support effect of the moving plate 6 at the top, thereby ensuring the safety of the equipment at the top of the moving plate 6.

[0028] The cleaning unit 1 includes a clean water tank 101. A circulating water pump 102 is connected to one side of the clean water tank 101. A three-way pipe 103 is connected to the outlet end of the circulating water pump 102. Pipe supports 104 are connected to both ends of the three-way pipe 103. One end of the pipe supports 104 is fixedly installed on both sides of the top of the clean water tank 101, and nozzles 105 are connected to each other on one side. An inlet pipe 106 is connected to the inlet end of the circulating water pump 102. One end of the inlet pipe 106 extends into the clean water tank 101, which can effectively enhance the flushing effect.

[0029] The electrolytic polishing tank 3 includes an insulating tank body 301. Insulating ceramic frames 302 are connected to both sides of the top of the insulating tank body 301. Electrode frames 303 are connected to the side of the insulating ceramic frames 302 that are close to each other. Multiple sets of negative conductors 304 are connected to the middle of the electrode frames 303. A terminal block 305 is connected to the top of the insulating tank body 301. A negative conductor 306 is connected to one end of the electrode frames 303. A positive conductor 307 is connected to one side of the terminal block 305. The positive conductor 307 and the negative conductor 306 are connected to the same power supply device 308. When the positioning chuck 150 contacts the limiting seat 16 located at the top of the insulating tank body 301, it also contacts the terminal block 305. Since the workpiece hanger 15 is made entirely of metal, it effectively conducts electricity to the workpiece. Combined with the electrolyte in the insulating tank body 301, electrolysis can effectively remove dirt and polish the surface of the workpiece.

[0030] Protective covers are installed at the top of the power supply device 308 and the top of the insulating pool 301 to effectively avoid accidental safety hazards and ensure electrical safety.

[0031] A reinforcing rib 24 is provided between the top of the fixed guide rail 12 and the movable plate 6, and a connecting frame is provided on one side to ensure the connection effect between the fixed guide rail 12 and the movable plate 6, while ensuring the support and driving effect on the lifting mechanism 13. The side of the fixed guide rail 12 away from the connecting frame is slidably connected to the lifting mechanism 13.

[0032] The lifting mechanism 13 includes a hollow steel frame 131. Triangular brackets 132 are connected to both ends of the hollow steel frame 131. A traction wheel 133 is rotatably installed at the top of the hollow steel frame 131. A connecting slide rail 134 is connected to one side of the hollow steel frame 131. Through the sliding connection between the connecting slide rail 134 and the fixed guide rail 12, it can be ensured that the lifting mechanism 13 can be driven to move laterally while the moving plate 6 moves laterally, thereby performing the workpiece conversion and cleaning process.

[0033] A support frame is connected to the top of the hollow steel frame 131. A traction wheel 133 is rotatably mounted on one side of the support frame. One end of the sling 14 passes through the moving plate 6, passes around the traction wheel 133, and is fixedly mounted at the bottom of the moving plate 6. The triangular bracket 132 is fitted with the workpiece lifting device 15 on both sides. While the winding roller 10 rotates to wind up the sling 14, the rotating traction wheel 133 can drive the hollow steel frame 131 to move upward, thereby adjusting its vertical position. At the same time, the triangular bracket 132 pulls the workpiece lifting device 15 from the bottom upward to ensure connection stability.

[0034] The workpiece lifting device 15 includes a crossbeam 151, with hangers 152 connected to both sides of the crossbeam 151. A fixed seat 153 is connected to the top of each hanger 152. A bracket 154 is connected to the side of each fixed seat 153 that is close to the other. Multiple sets of U-shaped steel frames 155 are connected to both sides of the crossbeam 151. A hanging plate 156 is connected to one side of each U-shaped steel frame 155. A suspension screw 157 is connected to one side of each hanging plate 156. A limiting threaded cylinder 158 is connected to one end of each suspension screw 157 to facilitate the simultaneous processing of multiple workpieces, thus ensuring the effectiveness of the workpiece. A slot is provided at the bottom of the bracket 154 corresponding to the triangular clamp 132. When lifting is required, the bracket 132 is moved to directly below the bracket 154 and then lifted, so that the bracket 132 is locked into the slot at the bottom of the bracket 154, ensuring the stability of the lifting movement.

[0035] Multiple positioning frames 159 are connected to one side of the crossbeam 151. A connecting rod is connected to one side of the positioning frame 159, and one end of the connecting rod is connected to the corresponding hanging plate 156. This can effectively ensure the stability of the position of 156, thereby improving the traction effect on the workpiece. Positioning clips 150 are connected to both ends of the crossbeam 151. The bottom end of the positioning clip 150 is fitted into the groove at the top of the limiting seat 16, which can effectively play the role of clamping and limiting, thereby ensuring the lifting effect of the workpiece.

[0036] The sludge storage box 18 has a sludge inlet on one side, and a baffle 20 is connected to the sludge inlet on the other side.

[0037] Working principle: In use, the invention drives the gear 8 via the drive motor 7, which in turn moves the moving plate 6 through meshing with the gear rail 9, positioning the workpiece hanger 15 directly above the cleaning unit 1. The workpiece is then hung on one end of the suspension screw 157, and the limiting threaded cylinder 158 is rotated for positioning and fixation. The servo motor 11 starts, driving the take-up roller 10 to rotate and release the sling 14. As the sling 14 is released, the entire hanger mechanism 13 is lowered along the fixed guide rail 12 via the traction wheel 133, immersing the workpiece in the clean water tank 101. Simultaneously, the ultrasonic generator 19 and the circulating water pump 102 are activated, drawing water from the clean water tank 101 through the inlet pipe 106, draining it through the three-way pipe 103 to the pipe rack 104, and spraying it out from the nozzle 105 to thoroughly rinse the workpiece. Meanwhile, the ultrasonic generator 19... 9. The ultrasonic workpiece is further cleaned. After cleaning by the cleaning unit 1, the workpiece is lifted by the workpiece hoist 15 and moved above the alkaline degreasing tank 2. Then, the workpiece hoist 15 is lowered and the workpiece is immersed in the alkaline solution in the alkaline degreasing tank 2 to remove oil and stains. The electric heating device 21 generates heat to ensure the treatment effect. Finally, the workpiece can be lifted and moved above the electrolytic polishing tank 3 and lowered so that the workpiece is immersed in the electrolyte in the insulating tank body 301. When the positioning clamp 150 is clamped to the limit seat 16 at the top of the electrolytic polishing tank 3, one side contacts the terminal block 305. The power supply device 308 supplies power to the electrode frame 303 and the terminal block 305 through the negative wire 306 and the positive wire 307. At this time, the negative conductor 304 carries the negative pole and the workpiece carries the positive pole. Through the principle of electrolytic polishing, the surface of the workpiece is polished.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated oil removal and cleaning device for workpieces with transverse and longitudinal spiral assistance, including a decontamination mechanism (111), characterized in that: The cleaning mechanism (111) includes a cleaning unit (1), an alkaline degreasing tank (2), and an electrolytic polishing tank (3). Supports (4) are connected to both sides of the cleaning mechanism (111). A top frame (5) is connected to the top of the support (4). A movable plate (6) is slidably arranged inside the top frame (5). A drive motor (7) is connected to the top of the movable plate (6). A gear (8) is connected to the output end of the drive motor (7) via a coupling. A gear rail (9) is connected to the top of the top frame (5). One side of the gear (8) meshes with the gear rail (9). A take-up roller (10) is rotatably arranged at the top of the movable plate (6). A servo motor (11) is connected to one end of the take-up roller (10). The bottom end of the movable plate (6) is connected to... A fixed guide rail (12) is provided, and a lifting mechanism (13) is slidably provided on one side of the fixed guide rail (12). A sling (14) is wound around the surface of the servo motor (11). Workpiece lifting tools (15) are connected to both sides of the lifting mechanism (13). Limit seats (16) are connected to the top of the cleaning unit (1), the alkaline degreasing tank (2), and the electrolytic polishing tank (3). A sludge storage box (18) is connected to one side of the cleaning unit (1) and the alkaline degreasing tank (2). An ultrasonic generator (19) is connected to the bottom of the inner wall of the cleaning unit (1) and the alkaline degreasing tank (2). An electric heating device (21) is connected to both sides of the inner wall of the alkaline degreasing tank (2). A reinforcing frame (22) is connected between the supports (4). The cleaning unit (1) includes a clear water tank (101), a circulating water pump (102) is connected to one side of the clear water tank (101), a three-way pipe (103) is connected to the outlet end of the circulating water pump (102), pipe supports (104) are connected to both ends of the three-way pipe (103), one end of the pipe supports (104) is fixedly installed on both sides of the top of the clear water tank (101), and nozzles (105) are connected to each other on one side. An inlet pipe (106) is connected to the inlet end of the circulating water pump (102), and one end of the inlet pipe (106) extends through into the clear water tank (101). The electrolytic polishing tank (3) includes an insulating tank body (301). Insulating ceramic frames (302) are connected to both sides of the top of the insulating tank body (301). Electrode frames (303) are connected to the side of the insulating ceramic frames (302) that are close to each other. Multiple sets of negative conductors (304) are connected to the middle of the electrode frames (303). A terminal block (305) is connected to the top of the insulating tank body (301). A negative conductor (306) is connected to one end of the electrode frame (303). A positive conductor (307) is connected to one side of the terminal block (305). The same power supply device (308) is connected to one end of the positive conductor (307) and the negative conductor (306). The lifting mechanism (13) includes a hollow steel frame (131), and triangular brackets (132) are connected to both ends of the hollow steel frame (131); The workpiece lifting device (15) includes a crossbeam (151), with hangers (152) connected to both sides of the crossbeam (151), and a fixed seat (153) connected to the top of each hanger (152). A bracket (154) is connected to the side of each fixed seat (153) that is close to each other. Multiple sets of U-shaped steel frames (155) are connected to both sides of the crossbeam (151). A hanging plate (156) is connected to one side of each U-shaped steel frame (155), and a hanging screw (157) is connected to one side of each hanging plate (156). A limit screw (158) is connected to one end of each hanging screw (157). A slot is opened at the bottom of the bracket (154) corresponding to the triangular bracket (132). Multiple positioning frames (159) are connected to one side of the crossbeam (151), and a connecting rod is connected to one side of the positioning frame (159), with one end of the connecting rod connected to the corresponding hanging plate (156). Positioning clips (150) are connected to both ends of the crossbeam (151).

2. The integrated oil removal and cleaning equipment for workpieces with transverse and longitudinal spiral assistance as described in claim 1, characterized in that: Protective covers are connected to the top of the power supply device (308) and the top of the insulating pool (301).

3. The integrated oil removal and cleaning equipment for workpieces with transverse and longitudinal spiral assistance as described in claim 1, characterized in that: A reinforcing rib (24) is provided between the top of the fixed guide rail (12) and the moving plate (6), and a connecting frame is provided on one side. The side of the fixed guide rail (12) away from the connecting frame is slidably connected to the lifting mechanism (13).

4. The integrated degreasing and cleaning equipment for workpieces with transverse and longitudinal spiral assistance as described in claim 1, characterized in that: The hollow steel frame (131) is rotatably equipped with a traction wheel (133) at its top end, and a connecting slide rail (134) is connected to one side of the hollow steel frame (131).

5. The integrated degreasing and cleaning equipment for workpieces with transverse and longitudinal spiral assistance as described in claim 4, characterized in that: The hollow steel frame (131) is connected to a support frame at the top. The traction wheel (133) is rotatably mounted on one side of the support frame. One end of the sling (14) passes through the moving plate (6), passes around the traction wheel (133), and is fixedly mounted at the bottom of the moving plate (6). The triangular bracket (132) is fitted with the workpiece lifting device (15) on both sides.

6. The integrated degreasing and cleaning equipment for workpieces with transverse and longitudinal spiral assistance as described in claim 1, characterized in that: The sludge storage box (18) has a sludge inlet on one side, and a baffle (20) is connected to the sludge inlet on the other side.

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