A river bottom sludge cleaning device

Abstract

The present invention discloses a river bottom silt cleaning device, which includes a hull and a suction pump. The suction pump is installed on the hull. A storage tank for storing silt is provided on the hull. A suction pipe for sucking silt and a discharge pipe for discharging the silt into the storage tank are installed on the suction pump. A filter cage is fixed to the end of the suction pipe away from the suction pump. The filter cage includes a top plate fixed to the suction pipe, an annular net fixed to the side of the top plate away from the suction pump, and a bottom plate fixed to the side of the annular net away from the top plate. The suction pipe passes through the top plate, and a scraping device for cleaning the annular net is provided on the annular net. This application has the effects of reducing the possibility of stone blockage at the suction pump inlet, improving the cleaning efficiency of river bottom silt, and reducing the possibility of suction pump damage.

Description

Technical Field

[0001] The present invention relates to the field of river dredging equipment, and in particular to a river bottom sludge cleaning equipment. Background Art

[0002] Water conservancy projects are projects built to control and allocate surface water and groundwater in nature to achieve the purpose of eliminating disasters and bringing benefits. In the construction of water conservancy projects, the cleaning of river bottom sludge is very important. If it cannot be cleaned in time, it will have a negative impact on water resources, people's living environment, regional investment environment, and development of tourism resources for a long time. When cleaning the river bottom sludge, it generally needs to be achieved through a dredging device. There are many types of dredging devices, and the most common dredging device is to sink a suction pump connected to the hull to the river bottom and suck the sludge at the river bottom onto the hull.

[0003] However, there are often large stones at the river bottom. Therefore, during the process of the suction pump sucking sludge, the stones at the river bottom often block the inlet of the suction pump, reducing the cleaning efficiency of the river bottom sludge and increasing the possibility of damage to the suction pump. Summary of the Invention

[0004] In order to reduce the possibility of stones blocking the inlet of the suction pump, improve the cleaning efficiency of the river bottom sludge, and reduce the possibility of damage to the suction pump, the present application provides a river bottom sludge cleaning equipment.

[0005] The river bottom sludge cleaning equipment provided by the present application adopts the following technical solutions:

[0006] A river bottom sludge cleaning equipment, including a hull and a suction pump. The suction pump is installed on the hull. A storage tank for storing sludge is provided on the hull. A suction pipe for sucking sludge and a discharge pipe for discharging the sludge into the storage tank are installed on the suction pump. A filter cage is fixed at the end of the suction pipe away from the suction pump. The filter cage includes a top plate fixed on the suction pipe, an annular net fixed on the side of the top plate away from the suction pump, and a bottom plate fixed on the side of the annular net away from the top plate. The suction pipe passes through the top plate, and a scraping device for cleaning the annular net is provided on the annular net.

[0007] By adopting the above technical solutions, the suction pump is installed on the hull. When cleaning the sludge at the river bottom, the end of the suction pipe together with the filter cage is inserted into the sludge, and the suction pump is started. The sludge at the river bottom can pass through the annular net and be discharged into the storage tank through the suction pump. When the mesh holes of the annular net are blocked, the scraping device can clean the annular net, thereby reducing the possibility of stones in the sludge blocking the inlet of the suction pump, improving the cleaning efficiency of the river bottom sludge, and reducing the possibility of damage to the suction pump.

[0008] Preferably, the scraping device includes a rotating ring rotatably arranged on the top plate. A vertical rod is fixed on the rotating ring, and a scraping strip for abutting against the outer peripheral surface of the annular net is installed on the vertical rod. The scraping device further includes a driving mechanism for driving the rotating ring to rotate.

[0009] By adopting the above technical solution, the vertical rod is fixed on the rotating ring, and the scraping strip is installed on the vertical rod. When the mesh holes on the annular net are blocked, the driving mechanism can drive the rotating ring to rotate, and the rotating ring can drive the scraping strip to scrape on the outer peripheral surface of the annular net, so that the scraping device can clean the mesh holes of the annular net when the mesh holes on the annular net are blocked, maintain the permeability of the annular net, enable the suction pipe to stably suck the river bottom sludge, reduce the possibility of the stones mixed in the sludge blocking the inlet of the suction pump, improve the cleaning efficiency of the river bottom sludge, and reduce the possibility of damage to the suction pump.

[0010] Preferably, an installation ring is fixed on the top plate, an annular slide rail is fixed on the installation ring, a sliding ring is fixed on the rotating ring, and the sliding ring is slidably arranged on the annular slide rail.

[0011] By adopting the above technical solution, the installation ring is fixed on the top plate, the annular slide rail is fixed on the installation ring, the sliding ring is fixed on the rotating ring, and the sliding ring is slidably arranged on the annular slide rail, so that the rotating ring can stably rotate on the top plate, and the scraping strip can scrape more stably on the outer peripheral surface of the annular net.

[0012] Preferably, the driving mechanism includes a motor fixedly connected to the top plate. A driving gear is installed on the output shaft of the motor, and an internal gear is coaxially and fixedly connected to the rotating ring. The driving gear meshes with the internal gear.

[0013] By adopting the above technical solution, the internal gear is fixed on the rotating ring, the motor is fixed on the top plate, and the driving gear fixed on the output shaft of the motor meshes with the internal gear. When the motor is started, the driving gear drives the rotating ring to rotate through the internal gear, so that the scraping strip can scrape more stably on the outer peripheral surface of the annular net, facilitating the cleaning of the annular net.

[0014] Preferably, a control mechanism is installed on the top plate, and the control mechanism includes a control tube connected to the filter cage and a control rod slidably arranged in the control tube, a fixed contact piece is embedded on the inner wall of the control tube, a moving contact piece that can be connected with the fixed contact piece is embedded on the control rod, and the moving contact piece is located above the fixed contact piece, and a thrust assembly for preventing the control rod from sliding downward is arranged in the control tube, a power supply is fixed on the top plate, the moving contact piece is electrically connected to one of the electrodes of the power supply, the other electrode of the power supply is connected to one of the terminal posts of the motor, and the other terminal of the motor is electrically connected to the fixed contact piece.

[0015] By adopting the above technical solution, the moving contact piece is electrically connected to one of the electrodes of the power supply, the other electrode of the power supply is connected to one of the terminal wires of the motor, and the other terminal of the motor is electrically connected to the fixed contact piece. When the mesh of the annular net is blocked more, as the suction pump continues to work, negative pressure will exist in the filter cage. As the negative pressure in the filter cage continues to increase, the control rod can overcome the thrust assembly and slide downward until the moving contact piece conflicts with the fixed contact piece, so that when the mesh of the annular net is blocked more, the motor can automatically start to clean the annular net.

[0016] Preferably, a control ring is fixed on the bottom surface of the inner gear, the top surface of the control tube is located below the bottom surface of the inner gear, and a notch is opened on the inner circumference of the control ring, and the notch is connected to the top and bottom surfaces of the control ring.

[0017] By adopting the above technical solution, when the negative pressure in the filter cage increases, the control rod overcomes the thrust of the thrust assembly and slides downward. When the top surface of the control rod is flush with the bottom surface of the control ring, the moving contact piece and the fixed contact piece are in conflict, and the motor starts automatically. At this time, the scraper strip scrapes on the outer peripheral surface of the annular net. As the blockages in some mesh holes on the annular net are scraped off, the pressure in the annular net gradually recovers. Under the elastic force of the second spring, the top surface of the control rod slides on the bottom surface of the control ring, so that the moving contact piece and the fixed contact piece remain in conflict. Until the control rod is aligned with the notch, the control rod is inserted into the notch under the elastic force of the second spring. At this time, the moving contact piece and the fixed contact piece are separated, so that the scraper strip automatically stops after scraping the annular net for one week, reducing the occurrence of the scraper strip stopping cleaning after only cleaning part of the annular net.

[0018] Preferably, an annular groove is provided in the control tube, and the thrust assembly includes a limiting ring fixed on the control rod and a first spring installed in the annular groove, the limiting ring is slidably arranged in the annular groove, one end of the first spring is fixed to the bottom wall of the annular groove, and the other end of the first spring is fixed to the bottom surface of the limiting ring.

[0019] By adopting the above technical solution, the limiting ring is slidably arranged in the annular groove, one end of the first spring abuts against the bottom wall of the annular groove, and the other end of the first spring abuts against the bottom surface of the limiting ring, hindering the control rod from sliding downwards.

[0020] Preferably, an installation groove is formed on the side surface of the vertical rod close to the annular net, the scraping strip is slidably arranged in the installation groove, a second spring for pressing the scraping strip tightly against the annular net is arranged in the installation groove, and the installation groove communicates with the bottom end surface of the vertical rod.

[0021] By adopting the above technical solution, under the elastic force of the second spring, the scraping strip can be tightly pressed against the outer peripheral surface of the annular net, thereby improving the cleaning efficiency of the scraping device.

[0022] Preferably, a limiting groove is formed on the side surface of the installation groove, the limiting groove communicates with the bottom end surface of the vertical rod, a limiting strip is fixed on the scraping strip, and the limiting strip is inserted into the limiting groove.

[0023] By adopting the above technical solution, the limiting strip is inserted into the limiting groove, thereby preventing the scraping strip from laterally separating from the vertical rod.

[0024] Preferably, a bolt is arranged at the bottom of the vertical rod, the bolt passes through the installation groove, the scraping strip is located above the bolt, and the bolt is threadedly connected to the vertical rod.

[0025] By adopting the above technical solution, the bolt passes through the installation groove, the scraping strip is located above the bolt, and the bolt is threadedly connected to the vertical rod, thereby preventing the scraping strip from sliding down and separating from the vertical rod.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The suction pump is installed on the hull. When cleaning the silt at the bottom of the river, the end of the suction pipe together with the filter cage is extended into the silt, and the suction pump is started. The silt at the bottom of the river can pass through the annular net and be discharged into the storage tank through the suction pump. When the mesh holes of the annular net are blocked, the scraping device can clean the annular net, thereby reducing the possibility of the stones mixed in the silt blocking the suction pump inlet, improving the cleaning efficiency of the silt at the bottom of the river, and reducing the possibility of damage to the suction pump;

[0028] 2. The moving contact piece is electrically connected to one of the electrodes of the power supply, the other electrode of the power supply is connected to one of the terminal wires of the motor, and the other terminal of the motor is electrically connected to the fixed contact piece. When the mesh of the annular net is blocked more, as the suction pump continues to work, there will be negative pressure in the filter cage. As the negative pressure in the filter cage continues to increase, the control rod can overcome the thrust assembly and slide downward until the moving contact piece conflicts with the fixed contact piece, so that when the mesh of the annular net is blocked more, the motor can automatically start to clean the annular net;

[0029] 3. When the negative pressure in the filter cage increases, the control rod overcomes the thrust of the thrust assembly and slides downward. When the top surface of the control rod is flush with the bottom surface of the control ring, the moving contact piece and the fixed contact piece are in conflict, and the motor starts automatically. At this time, the scraper strip scrapes on the outer peripheral surface of the annular net. As the blockages in some mesh holes on the annular net are scraped off, the pressure in the annular net gradually recovers. Under the elastic force of the second spring, the top surface of the control rod slides on the bottom surface of the control ring, so that the moving contact piece and the fixed contact piece keep in conflict. Until the control rod is aligned with the notch, the control rod is inserted into the notch under the elastic force of the second spring. At this time, the moving contact piece and the fixed contact piece are separated, so that the scraper strip automatically stops after scraping the annular net for one week, reducing the occurrence of the scraper strip stopping after only cleaning part of the annular net. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the sludge cleaning equipment in the embodiment of the present application.

[0031] Figure 2 It is a cross-sectional view of the filter cage and the drive mechanism in the embodiment of the present application.

[0032] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0033] Figure 4 It is a cross-sectional view of the scraper strip in the embodiment of the present application.

[0034] Figure 5 It is a cross-sectional view of the vertical rod in the embodiment of the present application.

[0035] Figure 6 yes Figure 2 A partial enlarged view of point B in the middle.

[0036] Description of reference numerals:

[0037] 1. Hull; 11. Storage tank; 2. Suction pump; 3. Suction pipe; 4. Discharge pipe; 5. Filter cage; 51. Top plate; 52. Annular net; 53. Bottom plate; 6. Scraping device; 61. Rotating ring; 62. Vertical rod; 621. Installation groove; 622. Limiting groove; 623. Second spring; 63. Scraping strip; 631. Limiting strip; 64. Installation ring; 65. Annular slide rail; 66. Sliding ring; 67. Driving mechanism; 671. Electric motor; 672. Driving gear; 673. Internal gear; 68. Control mechanism; 681. Control pipe; 6811. Annular groove; 682. Control rod; 683. Control ring; 6831. Notch; 684. Fixed contact; 685. Moving contact; 686. Power supply; 687. Thrust assembly; 6871. Limiting ring; 6872. First spring; 69. Bolt; 7. Lifting device; 71. Support rod; 72. Support platform; 73. Telescopic mechanism; 731. Hydraulic cylinder. Detailed implementation mode

[0038] The following will Figures 1-6 further elaborate on this application in detail.

[0039] The embodiment of this application discloses a river bottom sludge cleaning device. Refer to Figure 1 and Figure 2 As shown, the sludge cleaning device includes a hull 1, a suction pump 2, a suction pipe 3, a discharge pipe 4, a filter cage 5, a scraping device 6 and a lifting device 7. The suction pump 2 is fixedly installed on the top surface of the hull 1, and both the suction pipe 3 and the discharge pipe 4 are installed on the suction pump 2. A storage tank 11 is provided on the hull 1. The suction pipe 3 is extended towards the river bottom. When the suction pump 2 is started, the suction pump 2 sucks up the sludge through the suction pipe 3 and discharges it into the storage tank 11 through the discharge pipe 4.

[0040] Refer to Figure 1 and Figure 2 As shown, the filter cage 5 is arranged at the end of the suction pipe 3 far from the suction pump 2. The filter cage 5 includes a top plate 51, an annular net 52 and a bottom plate 53. Both the top plate 51 and the bottom plate 53 are circular plates. The suction pipe 3 passes through the top plate 51, and the top plate 51 is fixedly connected to the suction pipe 3. The annular net 52 is welded and fixed to the side of the top plate 51 far from the suction pump 2, and the bottom plate 53 is welded and fixed to the side of the annular net 52 far from the top plate 51.

[0041] Refer to Figure 2 and Figure 3As shown, the scraping device 6 includes a rotating ring 61, a vertical rod 62, a scraping strip 63, a mounting ring 64, an annular slide rail 65, a sliding ring 66, a driving mechanism 67 and a control mechanism 68. The mounting ring 64 is welded and fixed to the top plate 51, and the axis line of the mounting ring 64 coincides with the axis line of the top plate 51. The annular slide rail 65 is welded and fixed to the top surface of the mounting ring 64, and the sliding ring 66 is welded and fixed to the bottom surface of the rotating ring 61. The axis lines of the annular slide rail 65 and the sliding ring 66 both coincide with the axis line of the top plate 51, and the sliding ring 66 is slidably arranged on the annular slide rail 65.

[0042] Referring to Figure 2 and Figure 4 As shown, the vertical rod 62 is vertically arranged on the outer side of the annular net 52, and the top end of the vertical rod 62 is welded and fixed to the rotating ring 61. An installation groove 621 is formed on the side surface of the vertical rod 62 close to the annular net 52, and the installation groove 621 communicates with the bottom end surface of the vertical rod 62. The scraping strip 63 is slidably arranged in the installation groove 621.

[0043] Referring to Figure 2 and Figure 4 As shown, a second spring 623 for pressing the scraping strip 63 against the annular net 52 is arranged in the installation groove 621. One end of the second spring 623 abuts against the side surface of the scraping strip 63 far from the annular net 52, and the other end of the second spring 623 abuts against the inner wall of the installation groove 621 far from the annular net 52.

[0044] Referring to Figure 2 and Figure 4 As shown, limiting grooves 622 are formed on two side surfaces of the installation groove 621 far away from each other, and the limiting grooves 622 communicate with the bottom end surface of the vertical rod 62. Two limiting strips 631 are fixedly connected to the scraping strip 63, and the two limiting strips 631 are respectively located on two side surfaces of the scraping strip 63 far away from each other. The two limiting strips 631 are respectively inserted into the two limiting grooves 622, and the limiting strips 631 are slidably arranged in the limiting grooves 622. The width of the limiting groove 622 is greater than the width of the limiting strip 631. When the scraping strip 63 abuts against the outer peripheral surface of the annular net 52, the limiting strip 631 is located at the middle position of the limiting groove 622.

[0045] Referring to Figure 2 and Figure 5 As shown, a bolt 69 is arranged at the bottom of the vertical rod 62. The bolt 69 passes through the installation groove 621, the scraping strip 63 is located above the bolt 69, and the bolt 69 is threadedly connected to the vertical rod 62.

[0046] Referring to Figure 2 and Figure 3As shown, the driving mechanism 67 includes a motor 671, a driving gear 672, and an internal gear 673. The motor 671 is fixedly connected to the top surface of the top plate 51. The driving gear 672 is coaxially welded and fixed to the output shaft of the motor 671. The internal gear 673 is welded and fixed to the inner peripheral surface of the rotating ring 61. The driving gear 672 meshes with the internal gear 673. When the motor 671 starts, the driving gear 672 drives the rotating ring 61 to rotate through the internal gear 673, so that the scraping strip 63 can scrape more stably on the outer peripheral surface of the annular net 52.

[0047] Referring to Figure 2 and Figure 6 As shown, the control mechanism 68 is arranged on the top surface of the top plate 51. The control mechanism 68 includes a control pipe 681, a control rod 682, a control ring 683, a fixed contact 684, a moving contact 685, a power source 686, and a thrust assembly 687. The control pipe 681 is vertically welded and fixed to the top plate 51. The control pipe 681 communicates with the filter cage 5. The control rod 682 is vertically slidably arranged in the control pipe 681. The outer peripheral surface of the control rod 682 fits with the outer peripheral surface of the control pipe 681.

[0048] Referring to Figure 2 and Figure 6 As shown, the fixed contact 684 is embedded in the inner peripheral wall of the control pipe 681. The moving contact 685 is embedded in the control rod 682. The moving contact 685 is located above the fixed contact 684.

[0049] Referring to Figure 2 and Figure 6 As shown, an annular groove 6811 is formed in the control pipe 681. The thrust assembly 687 includes a limit ring 6871 and a first spring 6872. The limit ring 6871 is sleeved outside the control rod 682. The limit ring 6871 is welded and fixed to the bottom of the control rod 682. The limit ring 6871 is slidably arranged in the annular groove 6811. The first spring 6872 is installed in the annular groove 6811. One end of the first spring 6872 is fixed to the bottom wall of the annular groove 6811, and the other end of the first spring 6872 is fixed to the bottom surface of the limit ring 6871.

[0050] Referring to Figure 2 and Figure 6 As shown, the power source 686 is fixed to the top plate 51. The moving contact 685 is electrically connected to one of the electrodes of the power source 686. The other electrode of the power source 686 is wire-connected to one of the connection terminals of the motor 671. The other connection terminal of the motor 671 is electrically connected to the fixed contact 684. When the control rod 682 slides downward, the moving contact 685 can contact the fixed contact 684, and the motor 671 can start to clean the annular net 52 with the scraping strip 63.

[0051] Referring to Figure 2 andFigure 6 As shown, the control ring 683 is welded and fixed to the bottom surface of the internal gear 673. The axis line of the control ring 683 coincides with the axis line of the top plate 51. The top end face of the control pipe 681 is located below the bottom surface of the internal gear 673. A notch 6831 is formed on the inner circumferential surface of the control ring 683, and the notch 6831 communicates with the top surface and the bottom surface of the control ring 683.

[0052] Refer to Figure 1 and Figure 2 As shown, the lifting device 7 includes a support rod 71, a support platform 72, and a telescopic mechanism 73. The support platform 72 is horizontally arranged above the hull 1. Four support rods 71 are fixedly connected to the bottom surface of the support platform 72, and the bottom ends of the four support rods 71 are all fixed to the top surface of the hull 1.

[0053] Refer to Figure 1 and Figure 2 As shown, the telescopic mechanism 73 is a hydraulic cylinder 731. The hydraulic cylinder 731 is fixedly connected to the bottom surface of the support platform 72. The piston rod of the hydraulic cylinder 731 is vertically arranged, and the bottom end of the piston rod of the hydraulic cylinder 731 is welded and fixed to the middle of the top surface of the top plate 51. The telescopic movement of the piston rod of the hydraulic cylinder 731 can drive the end of the suction pipe 3 and the filter cage 5 to rise or fall, so as to facilitate the control of the river bottom sludge cleaning equipment.

[0054] The implementation principle of a river bottom sludge cleaning equipment in an embodiment of the present application is as follows: When a relatively large number of mesh holes of the annular net 52 are blocked, with the continuous operation of the suction pump 2, there will be negative pressure in the filter cage 5. As the negative pressure in the filter cage 5 continuously increases, the control rod 682 can overcome the elastic force of the first spring 6872 and slide downward until the moving contact piece 685 abuts against the fixed contact piece 684, so that the electric circuit of the motor 671 is automatically conducted when a relatively large number of mesh holes of the annular net 52 are blocked. When the electric circuit of the motor 671 is conducted, the driving gear 672 drives the rotating ring 61 to rotate through the internal gear 673, so that the vertical rod 62 drives the scraping strip 63 to scrape on the outer peripheral wall of the annular net 52, thereby reducing the possibility of the stones mixed in the sludge blocking the inlet of the suction pump 2, improving the cleaning efficiency of the river bottom sludge, and reducing the possibility of damage to the suction pump 2.

[0055] When the negative pressure in the filter cage 5 increases, the control rod 682 overcomes the thrust of the thrust assembly 687 and slides downward. When the top surface of the control rod 682 is flush with the bottom surface of the control ring 683, the movable contact piece 685 contacts the fixed contact piece 684, and the motor 671 starts automatically. At this time, the scraper bar 63 scrapes on the outer peripheral surface of the annular net 52. As the blockage of some mesh holes on the annular net 52 is scraped off, the pressure in the annular net 52 gradually recovers. Under the elastic force of the second spring 623, the top surface of the control rod 682 The surface slides on the bottom surface of the control ring 683, so that the movable contact piece 685 keeps in contact with the fixed contact piece 684 until the control rod 682 is aligned with the notch 6831. Under the action of the elastic force of the second spring 623, the top of the control rod 682 is inserted into the notch 6831. At this time, the movable contact piece 685 is disengaged from the fixed contact piece 684, so that the scraper 63 automatically stops after scraping the annular net 52 for one circle, thereby reducing the situation where the scraper 63 only stops cleaning after partially cleaning the annular net 52.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A river bottom sludge cleaning device, comprising a hull (1) and a suction pump (2), characterized in that: The suction pump (2) is installed on the hull (1). A storage tank (11) for storing silt is provided on the hull (1). A suction pipe (3) for sucking mud and a discharge pipe (4) for discharging the silt to the storage tank (11) are installed on the suction pump (2). A filter cage (5) is fixed to the end of the suction pipe (3) away from the suction pump (2). The filter cage (5) includes a top plate (51) fixed to the suction pipe (3), an annular net (52) fixed to the side of the top plate (51) away from the suction pump (2), and a bottom plate (53) fixed to the side of the annular net (52) away from the top plate (51). The suction pipe (3) passes through the top plate (51). A scraping device (6) for cleaning the annular net (52) is provided on the annular net (52); The scraping device (6) includes a rotating ring (61) rotatably provided on the top plate (51). A vertical rod (62) is fixed to the rotating ring (61). A scraping strip (63) for abutting against the outer peripheral surface of the annular net (52) is installed on the vertical rod (62). The scraping device (6) further includes a driving mechanism (67) for driving the rotating ring (61) to rotate; An installation ring (64) is fixed to the top plate (51). An annular slide rail (65) is fixed to the installation ring (64). A sliding ring (66) is fixed to the rotating ring (61). The sliding ring (66) is slidably provided on the annular slide rail (65); The driving mechanism (67) includes a motor (671) fixedly connected to the top plate (51). A driving gear (672) is installed on the output shaft of the motor (671). An internal gear (673) is coaxially and fixedly connected to the rotating ring (61). The driving gear (672) meshes with the internal gear (673); A control mechanism (68) is installed on the top plate (51). The control mechanism (68) includes a control pipe (681) communicating with the filter cage (5) and a control rod (682) slidably provided in the control pipe (681). A fixed contact (684) is embedded in the inner wall of the control pipe (681). A moving contact (685) that can contact the fixed contact (684) is embedded on the control rod (682). The moving contact (685) is located above the fixed contact (684). A thrust component (687) for hindering the downward sliding of the control rod (682) is provided in the control pipe (681). A power source (686) is fixed to the top plate (51). One electrode of the power source (686) is electrically connected to the moving contact (685). The other electrode of the power source (686) is wire-connected to one terminal of the motor (671). The other terminal of the motor (671) is electrically connected to the fixed contact (684); A control ring (683) is fixed to the bottom surface of the internal gear (673). The top surface of the control pipe (681) is located below the bottom surface of the internal gear (673). A notch (6831) is formed on the inner circumferential surface of the control ring (683), and the notch (6831) communicates with the top surface and the bottom surface of the control ring (683).

2. The bottom sludge cleaning device according to claim 1, characterized in that: An annular groove (6811) is formed in the control pipe (681). The thrust assembly (687) includes a limit ring (6871) fixed to the control rod (682) and a first spring (6872) installed in the annular groove (6811). The limit ring (6871) is slidably disposed in the annular groove (6811). One end of the first spring (6872) is fixed to the bottom wall of the annular groove (6811), and the other end of the first spring (6872) is fixed to the bottom surface of the limit ring (6871).

3. The bottom sludge cleaning device according to claim 1, characterized in that: An installation groove (621) is formed on the side surface of the vertical rod (62) close to the annular net (52). The scraping strip (63) is slidably disposed in the installation groove (621). A second spring (623) for pressing the scraping strip (63) against the annular net (52) is disposed in the installation groove (621), and the installation groove (621) communicates with the bottom end surface of the vertical rod (62).

4. The bottom sludge cleaning device according to claim 3, characterized in that: A limit groove (622) is formed on the side surface of the installation groove (621), and the limit groove (622) communicates with the bottom end surface of the vertical rod (62). A limit strip (631) is fixed to the scraping strip (63), and the limit strip (631) is inserted into the limit groove (622).

5. The bottom sediment cleaning device according to claim 3, characterized in that: A bolt (69) is disposed at the bottom of the vertical rod (62). The bolt (69) passes through the installation groove (621). The scraping strip (63) is located above the bolt (69), and the bolt (69) is threadedly connected to the vertical rod (62).

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