A sewage plant and pump station sewage pool dredging device and method

Abstract

The present application provides a kind of sewage plant and pump station sewage pool dredging device and dredging method, including mounting bracket, fixedly arranged base at the bottom end of mounting bracket and vertical slidingly arranged slide on mounting bracket, both ends of base are provided with connecting plate, the same end of two connecting plates is rotatably installed grab bucket, and the opposite side wall of two grab buckets is fitted when two grab buckets are engaged, the opposite end of two grab buckets is rotatably installed hinged rod, the movable end of hinged rod is rotatably connected to slide, the opposite end of two grab buckets is connected to slide by spring, and when two grab buckets are in engaged state, spring is in tension state.The present application has the effects of reducing the manufacturing cost of dredging device, prolonging the service life of dredging device and enhancing the operation stability of dredging device.

Description

Technical Field

[0001] This invention relates to the field of sewage tank dredging technology, and in particular to a sewage tank dredging device and dredging method for sewage treatment plants and pumping stations. Background Technology

[0002] Municipal sewage treatment plants and pumping stations typically have deep pools, often reaching depths of ten meters or more, and contain large amounts of toxic and harmful gases. Manual dredging of these pools is extremely labor-intensive, inefficient, and poses serious safety hazards.

[0003] Using this equipment can replace manual entry into the sewage tank for dredging operations, eliminating the need for manual entry into the tank and improving the safety of the sewage well dredging operation.

[0004] Current dredging grabs typically employ a dredging grabbing device as disclosed in Chinese Patent CN203514504U: it includes two symmetrical grabs, grab brackets, and grab bases. The grab base consists of an upper base and a middle upright forming a T-shaped structure. The upper base is connected to the lower end of a hydraulic scissor lifting arm. The grab bracket is slidably mounted on the middle upright. A hydraulic scissor telescopic arm is installed between the upper base and the grab bracket. The lower end of the middle upright is hinged to the upper part of the two symmetrical grabs respectively. Both ends of the grab bracket are hinged to the upper side of the two symmetrical grabs respectively through hinged tie rods. The grab bracket, tie rods, and two symmetrical grabs form an open-type four-bar linkage grabbing mechanism.

[0005] The opening and closing of its grab bucket is controlled by a hydraulic cylinder, and this driving method has the following drawbacks:

[0006] 1. Working inside sewage wells presents a harsh working environment and results in a short service life for hydraulic cylinders.

[0007] 2. The hydraulic oil supply pipeline required for the hydraulic cylinder drive needs to be connected to the ground. The pipeline is required to be long and has poor stability in the sewage well, which is not conducive to its use. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the present invention provides a sludge removal device and method for sewage treatment plants and pumping stations, which solves the problems of low safety and high labor intensity in sewage well sludge removal operations in the existing technology.

[0009] According to an embodiment of the present invention, a sludge removal device for sewage treatment plants and pumping stations includes a mounting frame, a base fixedly disposed at the bottom of the mounting frame, and a slide mounted vertically and slidably on the mounting frame. Both ends of the base are provided with connecting plates, and grab buckets are rotatably mounted on the same ends of the two connecting plates. When the two grab buckets are engaged, the opposite side walls of the two grab buckets are in contact. Hinges are rotatably mounted on the opposite ends of the two grab buckets. The movable end of the hinge is rotatably connected to the slide. The opposite ends of the two grab buckets are connected to the slide through springs, and the springs are in a tensioned state when the two grab buckets are engaged.

[0010] Preferably, a connecting rope is fixedly connected to the top of the base, and the two ends of the connecting rope are respectively connected to the two ends of the base. A hoisting frame is provided above the mounting frame, and a hoisting hole is provided inside the hoisting frame. A positioning hole for the connecting rope to pass through is provided on the outer ring of the hoisting frame.

[0011] Preferably, a flange plate is fixedly provided at the top of the mounting frame, the connecting rope passes through the flange hole, and when the hoisting frame is in the hoisting state, the positioning hole and the flange hole are directly opposite each other, and both ends of the connecting rope are in a vertical state.

[0012] Preferably, the slide has pairs of limiting rollers arranged on its opposite outer walls, and the connecting rope is located between the pairs of limiting rollers.

[0013] Preferably, the outer circumferential surface of the limiting roller is provided with an annular groove with an arc-shaped cross-section, and the radius of the arc is equal to the outer diameter of the connecting rope.

[0014] Preferably, the hoisting holes on the inner ring of the hoisting frame are horseshoe-shaped.

[0015] Preferably, the radial cross-section of the grab bucket has a fan-shaped structure.

[0016] Preferably, both sides of the carriage are horizontally rotatably mounted with connecting shafts, and one end of the spring is fixedly connected to the side wall of the connecting shaft.

[0017] Preferably, the base has inclined surfaces on both sides of its top, and the top of the inclined surfaces is located in the middle of the base.

[0018] Preferably, a sludge removal method for a sludge removal device for sewage treatment plants and pumping stations includes the following steps:

[0019] S1. Pass the hook of the hoisting equipment through the hoisting hole of the hoisting frame, and move the entire dredging device through the hoisting equipment. Move the hoisting equipment directly above the area to be constructed in the sewage tank, and control the dredging device to move downward. During the hoisting process, the slide slides down to the bottom of the mounting frame under the action of gravity. Under the action of the spring, the two grab buckets move towards the slide bucket, so that the openings of the two grab buckets face downward, and thus the two grab buckets are in an open state during the hoisting process.

[0020] S2. When the dredging device descends into the sewage tank, when the grab bucket comes into contact with the silt accumulated inside the sewage tank, the connecting plate connecting the base and the grab bucket will drive the grab bucket downward, allowing the silt to enter the grab bucket.

[0021] S3. After the dredging device reaches the set depth, control the hoisting equipment to lift the dredging device. As the grab bucket is pushed into the mud and sand, the mud and sand at the top creates resistance on the top surface of the grab bucket. In addition, the mounting frame lifts the hinge end of the grab bucket through the connecting plate, so that the grab bucket begins to rotate around its hinge point on the connecting plate and gradually rotates to the state where the opening faces upward.

[0022] S4. As the dredging device continues to be raised, the mud and sand above the grab bucket continuously enter the opening of the grab bucket. Through the gravity of the mud and sand and the resistance of the sewage, the grab bucket rotates to the lowest point and finally overcomes the elastic force of the spring to achieve the joining of the opposite side walls of the two grab buckets, thereby sealing the mud and sand inside the grab bucket.

[0023] S5. After hoisting the dredging device to the designated location, control the dredging device to descend so that the bottom of the grab bucket contacts the ground. Continue to control the mounting frame to move downward. During the descent of the mounting frame, the base moves downward, causing the grab bucket to rotate around the hinge point between it and the connecting plate. During the rotation, the grab bucket rotates again to the open-facing state under the action of the spring tension, and the internal mud and sand are completely poured out.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The part of the sludge removal device that enters the sewage tank is all mechanical, and this part of the mechanical structure is relatively simple. It can be fully cleaned and maintained when the sludge removal device is not in use, thus extending the service life of the sludge removal device.

[0026] 2. The dredging device has a relatively simple structure. After entering the sewage tank, it uses gravity and the elastic force of the spring to control the opening and closing of the grab bucket, without the need for external wiring control, making the dredging device easier to operate.

[0027] 3. The dredging device is hoisted by a hoisting device and the opening and closing of the grab bucket is controlled, which can adapt to heavier environments, and the manufacturing cost of the dredging device is low. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0029] Figure 2 This is a side view of an embodiment of the present invention.

[0030] Figure 3 This is a front view of an embodiment of the present invention.

[0031] Figure 4 This is a front view of another embodiment of the present invention.

[0032] In the above attached figures:

[0033] 1. Mounting bracket;

[0034] 2. Base;

[0035] 3. Carriage;

[0036] 4. Hinge rod;

[0037] 5. Connecting plate;

[0038] 6. Grab bucket;

[0039] 7. Spring;

[0040] 8. Connecting rope;

[0041] 9. Lifting frame;

[0042] 10. Limit rollers;

[0043] 11. Connecting shaft. Detailed Implementation

[0044] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] like Figure 1-3 As shown. This invention proposes a sludge removal device for sewage treatment plants and pumping stations, including a mounting frame 1, a base 2 fixedly installed at the bottom of the mounting frame 1, and a slide 3 vertically slidably installed on the mounting frame 1. Both ends of the base 2 are provided with connecting plates 5. Grab buckets 6 are rotatably installed on the same ends of the two connecting plates 5. When the two grab buckets 6 are engaged, their opposite sidewalls are in contact. Hinges 4 are rotatably installed on the opposite ends of the two grab buckets 6. The movable end of the hinge rod 4 is rotatably connected to the slide 3. The opposite ends of the two grab buckets 6 are connected to the slide 3 through springs 7. When the two grab buckets 6 are engaged, the springs 7 are in a tensioned state.

[0049] Due to the setting of spring 7, without the action of external force, the two springs 7 pull the two separate ends of the grab buckets 6 respectively, so that the two grab buckets 6 are in an open state with the opening of the grab buckets 6 facing downwards, which facilitates the grabbing of mud and sand in the sewage tank.

[0050] When the mounting frame 1 is lifted, the resistance of the sewage and the gravity of the grab bucket 6 are used to stretch the spring 7. In addition, during the stretching of the spring 7, the rise of the mounting frame 1 will drive the grab bucket 6 to rotate, thereby increasing the amount of mud and sand inside the grab bucket 6, which further facilitates the grabbing of mud and sand.

[0051] like Figure 1As shown. A connecting rope 8 is fixedly connected to the top of the base 2, and the two ends of the connecting rope 8 are respectively connected to the two ends of the base 2. A hoisting frame 9 is provided above the mounting frame 1. The hoisting frame 9 is provided with a hoisting hole inside, and a positioning hole is provided on the outer ring of the hoisting frame 9 for the connecting rope 8 to pass through.

[0052] To facilitate the hoisting of the dredging device, a hoisting frame 9 is installed above the mounting frame 1. The mounting frame 1 and the hoisting frame 9 are connected by a connecting rope 8. The middle part of the connecting rope 8 is wrapped around the outer wall of the hoisting frame 9. Positioning holes are provided on the hoisting frame 9 to improve the stability of the hoisting of the dredging device.

[0053] like Figure 1 As shown, to further improve the stability of the dredging device during hoisting, a flange plate is fixedly installed at the top of the mounting frame 1. The connecting rope 8 passes through the flange hole, and when the hoisting frame 9 is in the hoisting state, the positioning hole and the flange hole are directly opposite each other, and both ends of the connecting rope 8 are in a vertical state.

[0054] During the hoisting process, both ends of the connecting rope 8 are kept vertical. With the help of the positioning holes and flange holes, the mounting frame 1 and the hoisting frame 9 are kept on the same straight line, and both the mounting frame 1 and the hoisting frame 9 are located in the middle of the connecting rope 8.

[0055] like Figure 1 and Figure 2 As shown, during the lowering of the dredging device, to avoid interference between the connecting rope 8 and the movement of the slide 3, a pair of limiting rollers 10 are arranged on the opposite outer walls of the slide 3, and the connecting rope 8 is located between the pairs of limiting rollers 10.

[0056] Furthermore, the outer circumferential surface of the limiting roller 10 is provided with an annular groove with an arc-shaped cross-section, and the radius of the arc is equal to the outer diameter of the connecting rope 8.

[0057] like Figure 1 Hehe Figure 3 As shown, to ensure the hook is centered on the hoisting frame 9, the two sides of the hoisting frame 9 are balanced. The hoisting holes on the inner ring of the hoisting frame 9 are horseshoe-shaped.

[0058] like Figure 1 and Figure 2 As shown, to ensure the structural strength of the grab bucket 6, the radial cross-section of the grab bucket 6 is a fan-shaped structure.

[0059] In a preferred embodiment of the present invention, the relative angle between the spring 7 and the connecting shaft 11 changes when the grab bucket 6 rotates. To prevent friction between the spring 7 and the outer wall of the connecting shaft 11 caused by the change in angle, the connecting shaft 11 is horizontally rotatably mounted on both sides of the slide 3, and one end of the spring 7 is fixedly connected to the side wall of the connecting shaft 11. Rotating the connecting shaft 11 keeps the spring 7 in a straight line, thus extending the service life of the spring 7.

[0060] like Figure 1 As shown, to reduce the amount of mud and sand remaining on the base 2, inclined surfaces are provided on both sides of the top of the base 2, and the top of the inclined surfaces is located in the middle of the base 2.

[0061] A sludge removal method for a sludge removal device for sewage treatment plants and pumping stations includes the following steps:

[0062] S1. Pass the hook of the hoisting equipment through the hoisting hole of the hoisting frame 9, and move the entire dredging device through the hoisting equipment. Move the hoisting equipment directly above the sewage tank to be constructed area, and control the dredging device to move downward. During the hoisting process, the slide 3 slides down to the bottom of the mounting frame 1 under the action of gravity. Under the action of the spring 7, the disjointed ends of the two grab buckets 6 move toward the slide 3, so that the openings of the two grab buckets 6 face downward, and thus the two grab buckets 6 are in an open state during the hoisting process.

[0063] S2. When the dredging device descends in the sewage tank, when the grab bucket 6 comes into contact with the silt accumulated inside the sewage tank, the connecting plate 5 connected to the base 2 and the grab bucket 6 drives the grab bucket 6 to move downward, so that the silt enters the grab bucket 6.

[0064] S3. After the dredging device reaches the set depth, control the hoisting equipment to lift the dredging device. As the grab bucket 6 is pushed into the mud and sand, the mud and sand at the top creates resistance on the top surface of the grab bucket 6. In addition, the mounting frame 1 lifts the hinge end of the grab bucket 6 through the connecting plate 5, so that the grab bucket 6 begins to rotate around its hinge point on the connecting plate 5, and gradually rotates to the state where the opening faces upward.

[0065] S4. During the process of continuing to lift the dredging device, the mud and sand above the grab bucket 6 continuously enter the opening of the grab bucket 6. Through the gravity of the mud and sand and the resistance of the sewage, the grab bucket 6 rotates to the lowest point and finally overcomes the elastic force of the spring 7 to achieve the splicing of the opposite side walls of the two grab buckets 6, thereby sealing the mud and sand inside the grab bucket 6.

[0066] S5. After hoisting the dredging device to the designated location, control the dredging device to descend so that the bottom of the grab bucket 6 contacts the ground, and continue to control the mounting frame 1 to move downward. During the descent of the mounting frame 1, it drives the base 2 to move downward, thereby causing the grab bucket 6 to rotate around the hinge point between it and the connecting plate 5. During the rotation, under the tension of the spring 7, the grab bucket 6 rotates again to the state of opening upward, and completely dumps out the mud and sand inside.

[0067] Preferably, the bottom surface of the grab bucket 6 is provided with water-blocking ribs with a barbed cross-section, such as... Figure 2 As shown, when the lifting mounting frame 1 moves upward, the water-blocking ribs can move the grab bucket 6 in the direction pulled by the spring 7, and the elastic force of the middle part further facilitates the closing of the two grab buckets 6, thereby improving the efficiency of the two grab buckets 6 in grabbing mud and sand.

[0068] Another embodiment of the present invention,

[0069] like Figure 4 As shown. The present invention also provides another embodiment, including a mounting frame 1, a base 2 fixedly disposed at the bottom end of the mounting frame 1, and a slide 3 vertically slidably disposed on the mounting frame 1. Both ends of the base 2 are provided with connecting plates 5, and grab buckets 6 are rotatably mounted on the same ends of the two connecting plates 5. When the two grab buckets 6 are engaged, their opposite sidewalls are in contact. Hinges 4 are rotatably mounted on the opposite ends of the two grab buckets 6, and the movable end of the hinge rod 4 is rotatably connected to the slide 3. A spring 7 is disposed between the slide 3 and the base 2.

[0070] The spring 7 is placed between the slide 3 and the base 2, and the rest of the structure is the same as the structure in the above embodiment.

[0071] At this time, the spring 7 is used to pull the slide 3 to move downward. In this way, as the slide 3 moves downward, the slide 3 drives the hinge rod 4 to move downward. The hinge rod 4 presses down on the disjointed end of the grab bucket 6, causing the grab bucket 6 to close.

[0072] At this point, the specific dredging methods are as follows: S1. The dredging device with the grab bucket 6 in a closed state is hoisted to the construction area of ​​the sewage tank by passing the hook of the hoisting equipment through the hoisting hole of the hoisting frame 9. The dredging device is controlled to move downward and stops descending when the outer wall of the grab bucket 6 of the dredging device contacts the mud and sand in the sewage tank.

[0073] S2. Then control the dredging device to descend a set distance. At this time, due to the obstruction of the mud and sand on the grab bucket 6, the grab bucket 6 cannot move downward, while the mounting frame 1 continues to move vertically downward under the action of gravity. The mounting frame 1 drives the base 2 to continue to move downward. When the mounting frame 1 moves downward, since the grab bucket 6 cannot follow the movement, the slide 3 moves upward relative to the mounting frame 1, stretching the spring, and at the same time, the two grab buckets 6 open, with the openings of the two grab buckets 6 facing downward.

[0074] S3. After the dredging device descends to the set distance, control the hoisting equipment to lift the dredging device. During the lifting process, under the combined action of the spring 7 and the mounting frame 1 moving upward, the slide 3 moves downward relative to the mounting frame 1, thereby realizing the downward movement of the hinge rod 4 and pressing down the movable end of the grab bucket 6, and the two grab buckets 6 begin to rotate relative to each other.

[0075] S4. During the relative rotation of the two grab buckets 6, they grab the mud and sand. As the mounting frame 1 continues to move, under the combined action of the mud and sand and the resistance of the sewage, the slide 3 moves to the bottom of the mounting frame 1 and completes the splicing of the opposite side walls of the two grab buckets, thus realizing the grabbing of mud and sand.

[0076] S5. After the dredging device is hoisted to the sewage well, control the conveying equipment to transport the dredging device to the top of the unloading point, control the dredging device to move downward, and after the bottom surface of the grab bucket 6 contacts the ground, continue to move downward. At this time, the mounting frame 1 continues to move downward, and under the action of gravity, pushes the two grab buckets 6 to rotate to both sides to discharge the mud and sand.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A sewage plant and pumping station sewage tank dredging device, characterized in that: The utility model provides a kind of dredging device, including mounting frame (1), fixedly arranged base (2) at the bottom end of mounting frame (1) and vertically slidingly arranged slide (3) on mounting frame (1), both ends of base (2) are provided with connecting plate (5), the same end of two connecting plates (5) is rotatably installed grab bucket (6), and the opposite side wall of two grab buckets (6) is attached when two grab buckets (6) are engaged, the opposite end of two grab buckets (6) is rotatably installed articulated rod (4), the movable end of articulated rod (4) is rotatably connected to slide (3), the opposite end of two grab buckets (6) is connected to slide (3) by spring (7), and when two grab buckets (6) are in the engaged state, spring (7) is in tension state, under the action of no external force, two springs (7) respectively pull the opposite end of two grab buckets (6), so that two grab buckets (6) are in the open state.

2. The sewage plant and pump station sewage pool dredging device according to claim 1, characterized in that: The top of the base (2) is fixedly connected with a connecting rope (8), the two ends of the connecting rope (8) are respectively connected with the two ends of the base (2), the upper portion of the mounting frame (1) is provided with a hoisting frame (9), the hoisting frame (9) is provided with a hoisting hole, and the outer ring of the hoisting frame (9) is provided with a positioning hole through which the connecting rope (8) passes.

3. The device according to claim 2, characterized in that: The top end of the mounting frame (1) is fixedly provided with a flange plate, the connecting rope (8) passes through the flange hole, and when the hoisting frame (9) is in the hoisting state, the positioning hole and the flange hole are in the opposite state, and the two ends of the connecting rope (8) are in the vertical state.

4. The device according to claim 3, characterized in that: The opposite outer walls of the slide (3) are each provided with a pair of limiting rollers (10), and the connecting rope (8) is located between the pair of limiting rollers (10).

5. The device as claimed in claim 4, wherein the device is characterized in that: The outer circumferential surface of the limiting roller (10) is provided with an annular groove with an arc-shaped cross section, and the radius of the arc is equal to the outer diameter of the connecting rope (8).

6. The sewage plant and pumping station sewage pool dredging device according to claim 2, characterized in that: The hoisting hole in the inner ring of the hoisting frame (9) is in the shape of a horseshoe.

7. The sewage plant and pumping station sewage pool dredging device according to claim 1, characterized in that: The radial cross section of the grab bucket (6) is in the shape of a sector.

8. The sewage plant and pumping station sewage pool dredging device according to claim 1, characterized in that: The two sides of the slide (3) are each provided with a connecting shaft (11) rotatably installed horizontally, and one end of the spring (7) is fixedly connected to the side wall of the connecting shaft (11).

9. The sewage plant and pumping station sewage pool desilting device according to claim 1, characterized in that: The top of the base (2) is provided with an inclined surface on both sides, and the top end of the inclined surface is located in the middle of the base (2).

10. The method of dredging sewage lagoons of sewage plants and pumping stations according to claim 2, characterized in that, The method comprises the following steps: S1, pass the hook of the hoisting device through the hoisting hole of the hoisting frame (9), move the hoisting device to the top of the sewage pool to be constructed, control the dredging device to move downward, and under the action of gravity, the slide (3) slides to the bottom of the mounting frame (1), and under the action of the spring (7), the opposite end of the two grab buckets (6) moves towards the slide (3), so that the opening of the two grab buckets (6) faces downward, and the two grab buckets (6) are in the open state during hoisting; S2, when the grab bucket (6) contacts the silt accumulated in the sewage pool during the descent of the dredging device in the sewage pool, the grab bucket (6) is driven downward by the connecting plate (5) connected to the base (2), so that the silt enters the grab bucket (6). S3, after the dredging device reaches the set depth, the hoisting equipment is controlled to lift the dredging device, because the grab bucket (6) advances into the silt, the silt at the top causes resistance to the top surface of the grab bucket (6), in addition, the mounting frame (1) lifts the hinged end of the grab bucket (6) through the connecting plate (5), so that the grab bucket (6) starts to rotate around the hinge point on the connecting plate (5) and gradually rotates to the state of the opening facing upward; S4, in the process of continuing to lift the dredging device, the silt above the grab bucket (6) continuously enters the opening of the grab bucket (6), through the gravity of the silt and the resistance of the sewage, the grab bucket (6) rotates to the lowest point, and finally overcomes the elastic force of the spring (7) to realize the splicing of the two opposite side walls of the grab bucket (6), realizing the sealing of the silt in the grab bucket (6); S5, after the dredging device is hoisted to the designated location, the dredging device is controlled to descend, so that the bottom surface of the grab bucket (6) is in contact with the ground, and the mounting frame (1) is continuously controlled to move downward, the mounting frame (1) moves downward during the descending process, thereby driving the base (2) to move downward, and further making the grab bucket (6) rotate around the hinge point with the connecting plate (5), and in the rotating process, the grab bucket (6) is rotated again to the state of the opening facing upward under the action of the pulling force of the spring (7), and the internal silt is completely poured out.

Images