Sludge pretreatment device for sludge discharge vehicle

Abstract

The invention discloses a sludge pretreatment device for a sludge discharge vehicle, the sludge pretreatment device comprises a sludge scraper arranged in a sedimentation tank and a cross frame arranged on the sedimentation tank, the cross frame is provided with a sliding guide rail, the sliding guide rail extends along the length direction of the sedimentation tank, and the sliding guide rail is slidably connected with a sliding seat; according to the pretreatment device, the transverse frame, the mud scraper and the swing frame are arranged, the sliding guide rail is arranged on the transverse frame, the sliding seat, the mud scraper and the swing frame are driven to move back and forth in the direction of the long side edge of the sedimentation tank, the swing frame is matched to do circular motion with the rotating shaft as the axis, and the mud scraper moves back and forth to scrape mud on the inner side wall of the sedimentation tank; the sludge scraping device is simple in structure and suitable for performing sludge scraping processing on the four inner side walls of the sedimentation tank with a rectangular structure, so that sludge on the side walls of the sedimentation tank is scraped down, the sludge is gathered at the bottom of the sedimentation tank, the sludge is conveniently sucked away in various sludge discharging modes, such as a sludge discharging vehicle, subsequently, and the sludge discharging efficiency of the sedimentation tank is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment equipment, in particular to a sludge pre-treatment device for a sludge discharge truck. Background Art

[0002] A sedimentation tank is a structure that uses sedimentation to remove suspended matter from water. It is a water purification equipment that uses the natural sedimentation or coagulation sedimentation of water to remove suspended matter from water. Sedimentation tanks are divided into horizontal sedimentation tanks and vertical sedimentation tanks according to the direction of water flow. The sedimentation effect is determined by the flow rate of water in the sedimentation tank and the residence time of water in the tank. In order to improve the sedimentation effect and reduce the land area, honeycomb inclined tube counter-flow sedimentation tanks, accelerated clarification tanks, pulse clarification tanks, etc. are often used. Sedimentation tanks are widely used in wastewater treatment.

[0003] Mud removal trucks are specialized equipment used to remove sludge from the bottom of sedimentation tanks in facilities such as sewage treatment plants and waterworks. They remove the sludge from the bottom of the tank by pumping or scraping, avoiding the inefficiency and environmental pollution caused by manual cleaning. After a sedimentation tank has been used for a period of time, sludge accumulates not only on the bottom but also on the sidewalls. The sludge on the sidewalls is more difficult to clean than the sludge at the bottom. In addition to the sedimentation tank's own sludge removal mechanism, a mud removal truck is sometimes required to remove the sludge from the bottom of the tank. Most existing sludge scraping equipment can only scrape the sidewalls of circular sedimentation tanks, and cannot scrape rectangular structures. Publication number CN116212462A relates to a sludge scraper, comprising: a sedimentation tank; a sludge scraper mechanism disposed at the bottom of the sedimentation tank; a drive assembly connected to the sludge scraper mechanism and adapted to drive the sludge scraper mechanism to rotate relative to the bottom to scrape sludge from the bottom of the sedimentation tank. The sludge scraper mechanism comprises a scraper base connected to the drive assembly, a first transmission chain disposed on the scraper base, and a plurality of scraper members spaced apart on the first transmission chain, wherein adjacent sides of the scraper members connected to the first transmission chain are in contact with the bottom of the sedimentation tank. The first transmission chain is driven by the drive assembly to rotate relative to the scraper base in a first direction, and the scraper base is driven by the drive assembly to rotate relative to the bottom in a second direction, both of which are clockwise or counterclockwise. This sludge scraper can only scrape sludge from circular sedimentation tanks, and is not practical. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a pre-treatment device which is practical, reliable and has good mud scraping effect.

[0005] To achieve the above-mentioned purpose, the present invention provides a solution as follows: a sludge pretreatment device for a sludge discharge truck, comprising a sedimentation tank, a scraper arranged in the sedimentation tank, and a cross frame arranged on the sedimentation tank, wherein the cross frame is provided with a sliding guide rail, the sliding guide rail extends along the length direction of the sedimentation tank, the sliding guide rail is slidably connected to a sliding seat, the sliding seat is rotatably connected to a rotating shaft, a swing frame is mounted on the rotating shaft, the scraper is slidably connected in the swing frame, the swing frame performs a circular motion with the rotating shaft as the axis, so that the scraper moves back and forth to scrape the side wall of the sedimentation tank.

[0006] The beneficial effects of the present invention are: automatic sludge scraping processing of the sedimentation tank is realized, the pre-treatment device is provided with a horizontal frame, a scraper, and a swing frame, and a sliding guide rail is provided on the horizontal frame to drive the sliding seat, the scraper, and the swing frame to move back and forth along the longer side of the sedimentation tank, and cooperate with the swing frame to make a circular motion with the rotating shaft as the axis center line, so that the scraper moves back and forth to scrape the sludge on the inner wall of the sedimentation tank. It can be used to scrape the four inner walls of the sedimentation tank with a rectangular structure, thereby scraping off the sludge on the side wall of the sedimentation tank and gathering the sludge at the bottom of the sedimentation tank, which is convenient for subsequent sludge discharge through various methods, such as a sludge discharge vehicle to suck away the sludge, thereby improving the sludge discharge efficiency of the sedimentation tank. The overall structure is practical and reliable, with a high degree of automation and good sludge scraping effect.

[0007] Furthermore, a first servo motor is provided on the horizontal frame, the first servo motor is connected to a first screw, and the first screw is threadedly connected to the sliding seat. After adopting the above structure, the present invention drives the sliding seat to move back and forth along the longer side of the sedimentation tank.

[0008] Furthermore, a second servo motor is provided on the sliding seat, and the second servo motor is connected to the rotating shaft. After the present invention adopts the above structure, it can drive the rotating shaft to rotate, thereby driving the swing frame to rotate.

[0009] Furthermore, a sliding groove is formed at the front end of the swing frame, and the sliding groove extends along the length direction of the swing frame, and the scraper slides in the sliding groove. After the present invention adopts the above structure, the movement of the scraper is guided.

[0010] Furthermore, the top of the scraper is formed with a propulsion groove, the left side wall of the propulsion groove is formed with a first rack portion, and the right side wall of the propulsion groove is formed with a second rack portion. The first rack portion and the second rack portion both extend along the length of the propulsion groove, and the first rack portion and the second rack portion are opposite to each other. A driven gear is rotatably connected to the swing frame, and the driven gear is coaxially connected to the driving wheel. A third rack portion is formed on the outer periphery of the driving wheel, and the third rack portion is respectively engaged with the first rack portion or the second rack portion. The driving gear is used to drive the scraper to reciprocate. After adopting the above structure, the present invention can drive the scraper to rotate while driving the scraper to move back and forth in the sliding groove, thereby extending or retracting the swing frame.

[0011] Furthermore, the third rack portion has an arc-shaped structure.

[0012] Furthermore, a driving gear is mounted on the rotating shaft, and a plurality of transmission gears are rotatably connected to the swing frame. The plurality of transmission gears are arranged in sequence along the length direction of the swing frame, and the two adjacent transmission gears are meshed in the front and rear. The transmission gear at the front end is meshed with the driven gear, and the transmission gear at the rear end is meshed with the driving gear.

[0013] Furthermore, a scraping portion is formed on the front end surface of the scraper, and the scraping portion extends along the height direction of the scraper.

[0014] Furthermore, the scraper blade is rotatably connected to first rollers on both sides, and the swing frame is provided with guide grooves on both sides, the two guide grooves are connected to the sliding grooves, and the first rollers are rotatably connected to the guide grooves on the same side. After the present invention adopts the above structure, the scraper blade is easily moved.

[0015] Furthermore, a plurality of second rollers are rotatably connected to the bottom of the scraper blade, a guide rail is provided at the bottom of the sliding groove, and the plurality of second rollers are respectively rollingly connected to the guide rail.

[0016] Furthermore, the bottom of the sedimentation tank extends downwardly from both sides to the middle, and a mud discharge port is opened at the center of the bottom of the sedimentation tank. After the present invention adopts the above structure, it is convenient to discharge the sludge after scraping.

[0017] Furthermore, the mud discharge port is connected to a mud discharge pipe, and the mud discharge pipe is connected to a mud discharge pump.

[0018] The present invention also includes a scraping method for a scraper, comprising the following steps: S1. Control the scraper blade to be parallel to the length of the sedimentation tank, with the scraper blade at 0° and perpendicular to the front inner wall of the sedimentation tank. Then start the first servo motor to drive the sliding base and scraper blade forward until the distance between the sliding base and the front inner wall of the sedimentation tank is L and the scraping portion of the scraper blade contacts the front inner wall of the sedimentation tank. Then stop the first servo motor. S2. Activate the second servo motor, driving the swing frame and scraper blade to perform clockwise circular motion about the rotating shaft. Simultaneously, the rotating shaft drives the driven gear and driving wheel via the driving gear. The third rack engages with the first rack, driving the scraper blade to slide along the length of the swing frame and extend out of the swing frame, ensuring that the scraper blade continuously contacts the front inner wall of the sedimentation tank. S3. When the scraper unit contacts the corner of the sedimentation tank, the third rack unit separates from the first rack unit and engages with the second rack unit, driving the scraper blade to gradually retract into the sliding groove, causing the scraper unit to rotate from the front inner wall of the sedimentation tank to continuously contact the right inner wall of the sedimentation tank until the scraper blade swings to 90 degrees and is perpendicular to the right inner wall of the sedimentation tank; S4. Stop the second servo motor and control the first servo motor to drive the sliding seat and the scraper to move backward close to the rear inner wall of the sedimentation tank, so that the scraper continues to scrape the mud from the right inner wall of the sedimentation tank until the distance between the sliding seat and the rear inner wall of the sedimentation tank is L, and then stop the first servo motor; S5. Control the second servo motor to drive the swing frame and the scraper to perform clockwise circular motion around the rotating shaft, rotating the swing frame from 90° to 270°. The scraper completes the scraping process on the right inner wall and the rear inner wall of the sedimentation tank. S6. Stop the second servo motor and control the first servo motor to drive the sliding seat and the scraper to move forward, so that the scraper continues to scrape the left inner wall of the sedimentation tank until the distance between the sliding seat and the rear inner wall of the sedimentation tank is L, and stop the first servo motor; S7. Control the second servo motor to drive the swing frame and the scraper to continue to make clockwise circular motion with the rotating shaft as the axis, so that the swing frame rotates from 270° to 0°, and the scraper completes the scraping process on the left inner wall and the front inner wall of the sedimentation tank, completing one cycle of the scraping process.

[0019] Furthermore, when the scraping portion approaches the corner of the sedimentation tank, the scraping blade gradually extends out of the swing frame, and when the scraping portion moves away from the corner of the sedimentation tank, the scraping blade gradually retracts into the swing frame.

[0020] Furthermore, in step S7, after the sludge scraping is completed, the sludge falls to the bottom of the sedimentation tank and moves toward the sludge discharge port, and then the sludge discharge pump is started to suck the sludge output from the sludge discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective view of the overall structure of the present application Figure 1 .

[0022] Figure 2 is a perspective view of the overall structure of the present application Figure 2 .

[0023] Figure 3 is a perspective view of the overall structure of the present application

[0024] Figure 4 is a perspective view of the overall structure of the present application Figure 1 .

[0025] Figure 5 is a perspective view of the overall structure of the present application Figure 4 is an enlarged view of A in FIG. 1.

[0026] Figure 6 is a perspective view of the overall structure of the present application Figure 2 .

[0027] Figure 7 is a perspective view of the overall structure of the present application

[0028] wherein, 1 is a sedimentation tank, 11 is a sludge discharge port, 12 is a sludge discharge pipe, 13 is a sludge discharge pump, 2 is a cross frame, 21 is a sliding guide rail, 211 is a sliding seat, 22 is a first servo motor, 221 is a first screw rod, 31 is a second servo motor, 311 is a rotating shaft, 312 is a driving gear, 32 is a swing frame, 321 is a sliding groove, 322 is a transmission gear, 323 is a driven gear, 324 is a guide groove, 325 is a guide rail, 33 is a mud scraper, 331 is a pushing groove, 3311 is a first rack part, 3312 is a second rack part, 332 is a driving wheel, 3321 is a third rack part, 333 is a mud scraping part, 334 is a first roller, 335 is a second roller. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0030] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] See attached Figure 1 To the attached Figure 7 As shown, a sludge pretreatment device for a sludge discharge truck includes a scraper 33 arranged in a sedimentation tank 1 and a cross frame 2 arranged on the sedimentation tank 1. A sliding guide rail 21 is provided on the cross frame 2. The sliding guide rail 21 extends along the length direction of the sedimentation tank 1. A sliding seat 211 is slidably connected to the sliding guide rail 21. The sliding seat 211 is rotatably connected to a rotating shaft 311. A swing frame 32 is mounted on the rotating shaft 311. The scraper 33 is slidably connected in the swing frame 32. The swing frame 32 performs circular motion with the rotating shaft 311 as the axis, so that the scraper 33 moves back and forth to scrape the side wall of the sedimentation tank 1.

[0032] In this embodiment, a first servo motor 22 is provided on the horizontal frame 2 . The first servo motor 22 is connected to a first screw rod 221 . The first screw rod 221 is threadedly connected to the sliding seat 211 .

[0033] In this embodiment, a second servo motor 31 is provided on the sliding seat 211 , and the second servo motor 31 is connected to the rotating shaft 311 ; a sliding groove 321 is opened at the front end of the swing frame 32 , and the sliding groove 321 extends along the length direction of the swing frame 32 , and the scraper 33 slides in the sliding groove 321 .

[0034] In this embodiment, a propulsion groove 331 is formed on the top of the scraper 33, a first rack portion 3311 is formed on the left side wall of the propulsion groove 331, and a second rack portion 3312 is formed on the right side wall of the propulsion groove 331. The first rack portion 3311 and the second rack portion 3312 both extend along the length direction of the propulsion groove 331, and the first rack portion 3311 and the second rack portion 3312 are opposite to each other. A driven gear 323 is rotatably connected to the swing frame 32, and the driven gear 323 is coaxially connected to the driving wheel 332. A third rack portion 3321 is formed on the outer periphery of the driving wheel 332. The third rack portion 3321 The driving gear 312 is respectively engaged with the first rack portion 3311 or the second rack portion 3312, and is used to drive the scraper 33 to reciprocate back and forth, wherein the third rack portion 3321 has an arc-shaped structure; a driving gear 312 is mounted on the rotating shaft 311, and a plurality of transmission gears 322 are rotatably connected to the swing frame 32. The plurality of transmission gears 322 are arranged in sequence along the length direction of the swing frame 32, and the two adjacent transmission gears 322 are engaged with each other, the transmission gear 322 at the front end is engaged with the driven gear 323, and the transmission gear 322 at the rear end is engaged with the driving gear 312.

[0035] In this embodiment, a scraping portion 333 is formed on the front end surface of the scraper 33 , and the scraping portion 333 extends along the height direction of the scraper 33 .

[0036] In this embodiment, the scraper 33 is rotatably connected to the left and right sides with the first roller 334, and the left and right sides of the swing frame 32 are respectively provided with a guide groove 324, the two guide grooves 324 are respectively connected to the sliding groove 321, and the first roller 334 is rollingly connected to the guide groove 324 on the same side.

[0037] In this embodiment, a plurality of second rollers 335 are rotatably connected to the bottom of the scraper 33 , a guide rail 325 is provided at the bottom of the sliding groove 321 , and the plurality of second rollers 335 are respectively rollingly connected to the guide rail 325 .

[0038] In this embodiment, the bottom of the sedimentation tank 1 extends downward from both sides to the middle, and a mud discharge port 11 is opened at the center of the bottom of the sedimentation tank 1. The mud discharge port 11 is connected to a mud discharge pipe 12, and the mud discharge pipe 12 is connected to a mud discharge pump 13.

[0039] In this embodiment, the sum of the maximum extension length of the scraper 33 and the length of the swing frame is equal to half of the shorter inner side of the sedimentation tank.

[0040] This embodiment also includes a scraping method for a scraper, comprising the following steps: S1. Control the length direction of the mud scraper 33 and the sedimentation tank 1 parallel, the mud scraper 33 is at 0°, and make the mud scraper 33 in the initial position, that is, the mud scraper 33 is wholly or partially retracted into the sliding groove 321, and the mud scraper 33 and the swing frame 32 are perpendicular to the front inner side wall of the sedimentation tank 1, then start the first servo motor 22, the first servo motor 22 drives the screw to rotate forward, to drive the sliding seat 211, the swing frame 32, the mud scraper 33 to move forward, until the distance between the sliding seat 211 and the front inner side wall of the sedimentation tank 1 is L, the mud scraping part 333 of the mud scraper 33 just contacts the front inner side wall of the sedimentation tank 1, stop the first servo motor 22.

[0041] S2. Start the second servo motor 31, drive the swing frame 32 and the mud scraper 33 to make the clockwise circular motion with the rotating shaft 311 as the axis, synchronously, the rotating shaft 311 drives the driving gear 312 to rotate, the driving gear 312 drives the plurality of transmission gears 322 to rotate in turn, so that the transmission gear 322 at the most front end drives the driven gear 323 to rotate, the driven gear 323 drives the driving wheel 332 to rotate, the third rack part 3321 first engages with the first rack part 3311, since the driving wheel 332 is coaxially connected with the driven gear 323, therefore the driving wheel 332 is stationary relative to the swing frame 32, so that the rotation of the driving wheel 332 realizes driving the mud scraper 33 to slide out of the swing frame 32 along the length direction of the swing frame 32, so that the mud scraping part 333 and part of the mud scraper 33 gradually extend out of the swing frame 32, so that when the swing frame 32 and the mud scraper 33 make the clockwise circular motion with the rotating shaft 311 as the axis, the mud scraping part 333 also gradually extends out of the swing frame 32, so that the mud scraping part 333 continuously contacts the front inner side wall of the sedimentation tank 1, but the mud scraping part 333 will not extend too much to cause the mud scraping part 333 to tightly clamp the inner side wall of the sedimentation tank 1, so that the mud scraping part 333 cannot continue to rotate, or too little.

[0042] S3. Thus, according to the above step S2, the mud is first scraped from half of the front inner wall of the sedimentation tank 1 until the mud scraping portion 333 contacts the corner between the front inner wall and the right inner wall of the sedimentation tank 1, that is, when the mud scraper 33 and the swing frame 32 swing to 45 degrees, the third rack portion 3321 rolls to the end of the first rack portion 3311, so that the driving wheel 332 continues to rotate, and the third rack portion 3321 separates from the first rack portion 3311. Then, after the driving wheel 332 continues to rotate for a certain angle, the third rack portion 3321 and the second rack portion 33 12 are engaged. Since the second rack portion 3312 is opposite to the first rack portion 3311, the rotation of the third rack portion 3321 drives the scraper 33 to gradually retreat and retract into the sliding groove 321, so that the scraper portion 333 turns from the corner between the front inner wall and the right inner wall of the sedimentation tank 1 to continuously contact the right inner wall of the sedimentation tank 1 until the scraper 33 swings to 90°, and the scraper 33 is perpendicular to the right inner wall of the sedimentation tank 1. At this time, the scraper 33 completes the scraping process of a small section of the right inner wall of the sedimentation tank 1, and the distance of this small section is L.

[0043] S4. Stop the second servo motor 31 to stop the scraper 33 and the swing frame 32 from continuing to swing, so as to keep the scraper 33 at 90 degrees, perpendicular to the right inner wall of the sedimentation tank 1, and then control the first servo motor 22 to work, drive the first screw 221 to rotate in the opposite direction, thereby driving the sliding seat 211, the scraper 33, and the swing frame 32 to move backward close to the rear inner wall of the sedimentation tank 1. Since the scraper 33 is perpendicular to the right inner wall of the sedimentation tank 1, and the scraping part 333 contacts the right inner wall of the sedimentation tank 1, the backward movement of the scraper 33 causes the scraping part 333 to continue to scrape the right inner wall of the sedimentation tank 1 until the distance between the sliding seat 211 and the rear inner wall of the sedimentation tank 1 is L, and stop the first servo motor 22 to cut off the power supply of the sliding seat 211, the scraper 33, and the swing frame 32 to continue moving, so that the stroke distance L of the unfinished scraping of the right inner wall of the sedimentation tank 1

[0044] S5. Control the second servo motor 31 to drive the rotating shaft 311 to continue to rotate, so as to drive the swing frame 32 and the scraper 33 to perform clockwise circular motion with the rotating shaft 311 as the axis, so that the swing frame 32 rotates from 90° to 270°, and the scraper 33 completes the right inner wall and the rear inner wall of the sedimentation tank 1 to scrape the mud; Specifically, during the process of the swing frame 32 and the scraper 33 rotating from 90° to 135°, the third rack portion 3321 of the driving wheel 332 separates from the second rack portion 3312 and re-engages with the first rack portion 3311. In this process, the scraper 33 gradually slides out of the swing frame 32 until the scraper 33 rotates to 135°, causing the scraper portion 333 to contact the corner between the right inner wall and the rear inner wall of the sedimentation tank 1. The third rack portion 3321 separates from the first rack portion 3311, completing the scraping process of the remaining portion of the right inner wall of the sedimentation tank 1. During the process of the swing frame 32 and the scraper 33 rotating from 135° to 180°, the third rack portion 3321 of the driving wheel 332 separates from the first rack portion 3311 and re-engages with the second rack portion 3312. In this process, the scraper 33 gradually slides and retracts into the swing frame 32 until the scraper 33 rotates to 180°, so that the scraping portion 333 is perpendicular to the rear inner wall of the sedimentation tank 1. The third rack portion 3321 separates from the first rack portion 3311, completing the scraping process of half of the rear inner wall of the sedimentation tank 1. During the process of the swing frame 32 and the scraper 33 rotating from 180° to 225°, the third rack portion 3321 of the driving wheel 332 separates from the second rack portion 3312 and re-engages with the first rack portion 3311. In this process, the scraper 33 gradually slides out of the swing frame 32 until the scraper 33 rotates to 225°, causing the scraper portion 333 to contact the corner between the rear inner wall and the left inner wall of the sedimentation tank 1. The third rack portion 3321 separates from the first rack portion 3311, completing the scraping process of the other half of the rear inner wall of the sedimentation tank 1. During the process of the swing frame 32 and the scraper 33 rotating from 225° to 270°, the third rack portion 3321 of the driving wheel 332 separates from the first rack portion 3311 and re-engages with the second rack portion 3312. In this way, the scraper 33 gradually slides back into the swing frame 32 during the process until the scraper 33 rotates to 270°, so that the scraping portion 333 is perpendicular to the right inner wall of the sedimentation tank 1, the third rack portion 3321 separates from the first rack portion 3311, and the scraper 33 completes the scraping process of a small section of the left inner wall of the sedimentation tank 1, and the distance of this small section is L.

[0045] S6. Stop the second servo motor 31 to stop the scraper 33 and the swing frame 32 from continuing to swing, so as to keep the scraper 33 at 270°, perpendicular to the right inner wall of the sedimentation tank 1, and then control the first servo motor 22 to work, drive the first screw 221 to rotate forward, thereby driving the sliding seat 211, the scraper 33, and the swing frame 32 to move forward close to the front inner wall of the sedimentation tank 1. Since the scraper 33 is perpendicular to the left inner wall of the sedimentation tank 1, and the scraping part 333 contacts the left inner wall of the sedimentation tank 1, the forward movement of the scraper 33 causes the scraping part 333 to continue to scrape the left inner wall of the sedimentation tank 1 until the distance between the sliding seat 211 and the front inner wall of the sedimentation tank 1 is L, stop the first servo motor 22, and cut off the power to the sliding seat 211, the scraper 33, and the swing frame 32 to continue moving, so that the stroke distance of the left inner wall of the sedimentation tank 1 that has not completed the scraping is L.

[0046] S7. Control the second servo motor 31 to drive the swing frame 32 and the scraper 33 to continue to make clockwise circular motion with the rotating shaft 311 as the axis, so that the swing frame 32 rotates from 270° to 0°, and the scraper 33 completes the scraping process of the left inner wall and the front inner wall of the sedimentation tank 1, completing one cycle of the scraping process; after the scraping is completed, the sludge falls to the bottom of the sedimentation tank 1 and moves to the mud discharge port 11, and then the mud discharge pump 13 is started to suck the sludge output from the mud discharge port 11.

[0047] Specifically, during the process of the swing frame 32 and the scraper 33 rotating from 270° to 315°, the third rack portion 3321 of the driving wheel 332 separates from the second rack portion 3312 and re-engages with the first rack portion 3311. In this process, the scraper 33 gradually slides out of the swing frame 32 until the scraper 33 rotates to 315°, causing the scraper portion 333 to contact the corner between the left inner wall and the front inner wall of the sedimentation tank 1. The third rack portion 3321 separates from the first rack portion 3311, completing the scraping process of the remaining portion of the left inner wall of the sedimentation tank 1. During the process of the swing frame 32 and the scraper 33 rotating from 315° to 0°, the third rack portion 3321 of the driving wheel 332 separates from the first rack portion 3311 and re-engages with the second rack portion 3312. In this way, the scraper 33 gradually slides back into the swing frame 32 during the process until the scraper 33 rotates to 0°, so that the scraping portion 333 is perpendicular to the front inner wall of the sedimentation tank 1, and the third rack portion 3321 separates from the first rack portion 3311, completing the scraping process of the remaining front inner wall of the sedimentation tank 1.

[0048] In this way, one cycle of scraping mud is completed.

[0049] Wherein, the mud scraping part 333 is close to the corner of the sedimentation tank 1, the mud scraper 33 gradually extends out of the swing frame 32, when the mud scraping part 333 is away from the corner of the sedimentation tank 1, the mud scraper 33 gradually retracts into the swing frame 32.

[0050] Wherein, the two ends of the first rack part 3311 and the two ends of the second rack part 3312 are still a certain distance away from the two ends of the advancing groove 331, so that when the third rack part 3321 is separated from the first rack part 3311 and not engaged with the second rack part 3312, or when the third rack part 3321 is separated from the second rack part 3312 and not engaged with the first rack part 3311, the mud scraping part 333 is just located at one of the four corners of the sedimentation tank 1, and the mud scraper 33 can slide slightly forward and backward at this time, so as to prevent the mud scraper 33 from moving too much, causing the mud scraping part 333 to be clamped in one of the four corners of the sedimentation tank 1 and unable to move.

[0051] The mud scraper of the embodiment is suitable for rectangular specification sedimentation tank 1, and for different length, width and height specifications of the sedimentation tank 1, the length and height of the swing frame 32 and the length and height of the mud scraper 33 can be adjusted accordingly, so that different specifications of the sedimentation tank 1 can be scraped accordingly.

[0052] At the same time, in order to adapt to the speed of the swing frame 32 and the mud scraper 33 in circular motion, the sliding speed of the mud scraper 33 sliding out and retracting into the swing frame 32 can be adjusted, so that the mud scraping part 333 of the mud scraper 33 can continuously and just contact the inner side wall of the sedimentation tank 1, but it will not appear that the mud scraping part 333 is clamped to the inner side wall of the sedimentation tank 1 due to the mud scraper 33 extending too much, causing the mud scraping to fail, and the damage of the clamping of each part, or it will not appear that the mud scraping part 333 of the mud scraper 33 cannot touch the inner side wall of the sedimentation tank 1 due to the speed of the mud scraper 33 extending cannot keep up with the speed of the mud scraper 33 rotating, causing the mud scraping to fail. Specifically, during the adjustment process, the diameter and the number of teeth of the driving gear 312, the diameter and the number of teeth of each transmission gear 322, the diameter and the number of teeth of the driven gear 323, and the diameter and the number of teeth of the driving wheel 332 can be adjusted according to the actual situation, so as to adjust the rotation speed of each driven gear 323, the rotation speed of the driven gear 323, and the rotation speed of the driving wheel 332, and adjust the length of the first rack part 3311 and the length of the second rack part 3312, so as to adjust the sliding extension speed and the sliding retraction speed of the mud scraper 33, and ensure that the mud scraping part 333 of the mud scraper 33 can continuously and just contact the inner side wall of the sedimentation tank 1.

[0053] Moreover, the scraping part 333 of the scraper 33 can be made of elastic material, so that when the scraping part 333 of the scraper 33 touches the inner side wall of the sedimentation tank 1, elastic deformation occurs, the impact force generated when the scraping part 333 touches the inner side wall of the sedimentation tank 1 is reduced, the wear of the components caused by the scraping part 333 touching the inner side wall of the sedimentation tank 1 is reduced, the overall service life is improved, and the sludge scraping quality is also improved.

[0054] After the sludge scraping is completed, the sludge is accumulated at the bottom of the sedimentation tank 1, at this time, the sludge at the bottom of the sedimentation tank 1 can also be sucked away by the sludge suction truck, so that the side wall of the sedimentation tank 1 does not need to be sucked, and the overall sludge suction efficiency of the sludge suction truck is improved.

[0055] The above-described embodiments are only the preferred embodiments of the present application, and do not limit the present application in any form. Any person skilled in the art can make more possible changes and decorations to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, by using the disclosed technical content. Therefore, any equivalent equivalent changes made in accordance with the idea of the present application, without departing from the content of the technical solutions of the present application, should be covered within the protection scope of the present application.

Claims

1. A sludge pre-treatment device for a sludge discharge truck, comprising a sedimentation tank, a sludge scraper disposed in the sedimentation tank, and a cross frame disposed on the sedimentation tank, characterized in that: A sliding guide rail is provided on the horizontal frame, and the sliding guide rail extends along the length direction of the sedimentation tank. A sliding seat is slidably connected to the sliding guide rail, and the sliding seat is rotatably connected to a rotating shaft. A swing frame is mounted on the rotating shaft, and the scraper is slidably connected inside the swing frame. The swing frame performs circular motion with the rotating shaft as the axis, so that the scraper moves back and forth to scrape the mud from the side wall of the sedimentation tank.

2. The sludge pre-treatment device for a sludge discharge truck according to claim 1, characterized in that: A first servo motor is provided on the horizontal frame, the first servo motor is connected to a first screw rod, and the first screw rod is threadedly connected to the sliding seat.

3. The sludge pre-treatment device for a sludge discharge truck according to claim 1, characterized in that: A second servo motor is provided on the sliding seat, and the second servo motor is connected to the rotating shaft.

4. The sludge pre-treatment device for a sludge discharge truck according to claim 1, characterized in that: A sliding groove is provided at the front end of the swing frame. The sliding groove extends along the length direction of the swing frame, and the scraper slides in the sliding groove.

5. The sludge pre-treatment device for a sludge discharge truck according to claim 1, characterized in that: A propulsion groove is formed on the top of the scraper, a first rack portion is formed on the left side wall of the propulsion groove, and a second rack portion is formed on the right side wall of the propulsion groove. The first rack portion and the second rack portion both extend along the length direction of the propulsion groove, and the first rack portion and the second rack portion are opposite to each other. A driven gear is rotatably connected to the swing frame, and the driven gear is coaxially connected to the driving wheel. A third rack portion is formed on the outer periphery of the driving wheel, and the third rack portion is respectively engaged with the first rack portion or the second rack portion. The driving gear is used to drive the scraper to reciprocate back and forth.

6. The sludge pre-treatment device for a sludge discharge truck according to claim 5, characterized in that: A driving gear is mounted on the rotating shaft, and a plurality of transmission gears are rotatably connected to the swing frame. The plurality of transmission gears are arranged in sequence along the length direction of the swing frame, and the front and rear adjacent transmission gears are meshed. The transmission gear at the front end is meshed with the driven gear, and the transmission gear at the rear end is meshed with the driving gear.

7. The sludge pre-treatment device for a sludge discharge truck according to claim 1, characterized in that: A scraping portion is formed on the front end surface of the scraper, and the scraping portion extends along the height direction of the scraper.

8. The sludge pre-treatment device for a sludge discharge truck according to claim 1, characterized in that: The left and right sides of the scraper are respectively rotatably connected with first rollers, the left and right sides of the swing frame are respectively provided with guide grooves, the two guide grooves are respectively connected to the sliding grooves, and the first roller is rollingly connected in the guide groove on the same side.

9. The sludge pre-treatment device for a sludge discharge truck according to claim 1, characterized in that: The bottom of the scraper is rotatably connected to a plurality of second rollers, the bottom of the sliding groove is provided with a guide rail, and the plurality of second rollers are respectively rollingly connected to the guide rail.

10. A method for scraping mud using a mud scraper according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Control the scraper blade to be parallel to the length of the sedimentation tank, with the scraper blade at 0° and perpendicular to the front inner wall of the sedimentation tank. Then start the first servo motor to drive the sliding base and scraper blade forward until the distance between the sliding base and the front inner wall of the sedimentation tank is L and the scraping portion of the scraper blade contacts the front inner wall of the sedimentation tank. Then stop the first servo motor. S2. Activate the second servo motor, driving the swing frame and scraper blade to perform clockwise circular motion about the rotating shaft. Simultaneously, the rotating shaft drives the driven gear and driving wheel via the driving gear. The third rack engages with the first rack, driving the scraper blade to slide along the length of the swing frame and extend out of the swing frame, ensuring that the scraper blade continuously contacts the front inner wall of the sedimentation tank. S3. When the scraper unit contacts the corner of the sedimentation tank, the third rack unit separates from the first rack unit and engages with the second rack unit, driving the scraper blade to gradually retract into the sliding groove, causing the scraper unit to rotate from the front inner wall of the sedimentation tank to continuously contact the right inner wall of the sedimentation tank until the scraper blade swings to 90 degrees and is perpendicular to the right inner wall of the sedimentation tank; S4. Stop the second servo motor and control the first servo motor to drive the sliding seat and the scraper to move backward close to the rear inner wall of the sedimentation tank, so that the scraper continues to scrape the mud from the right inner wall of the sedimentation tank until the distance between the sliding seat and the rear inner wall of the sedimentation tank is L, and then stop the first servo motor; S5. Control the second servo motor to drive the swing frame and the scraper to perform clockwise circular motion around the rotating shaft, rotating the swing frame from 90° to 270°. The scraper completes the scraping process on the right inner wall and the rear inner wall of the sedimentation tank. S6. Stop the second servo motor and control the first servo motor to drive the sliding seat and the scraper to move forward, so that the scraper continues to scrape the left inner wall of the sedimentation tank until the distance between the sliding seat and the rear inner wall of the sedimentation tank is L, and stop the first servo motor; S7. Control the second servo motor to drive the swing frame and the scraper to continue to make clockwise circular motion with the rotating shaft as the axis, so that the swing frame rotates from 270° to 0°, and the scraper completes the scraping process on the left inner wall and the front inner wall of the sedimentation tank, completing one cycle of the scraping process.

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