A hydraulic grab device for areas with strong karst development

Abstract

The present invention discloses a hydraulic grab device for areas with strong karst development. The present invention relates to the field of hydraulic grabs for areas with strong karst development, comprising a first articulated block, a first grab fixedly connected to the outer surface of the first articulated block, and a second articulated block rotatably sleeved on the central axis of the first articulated block. The advantages of the present invention are that: mechanical extrusion force is not used for grabbing rock and soil, so that the rock and soil around the first and second grabs are not pressed toward the surrounding areas, so that the range affected by the grab is only within the grabbing area, reducing the impact on the areas with strong karst development and reducing the ecological damage in the areas with strong karst development. In addition, the hydraulic grab device is easy to install, so that the hydraulic grab device can be applied to a variety of external machines. Even if the terrain in the areas with strong karst development is complex, it will not affect the use of the device. At the same time, the opening and closing speed of the device can be automatically adapted to the dispersion speed of the rock and soil, so that it is not easy to cause the scraper to idle and compress the rock and soil, and is fully suitable for areas with strong karst development.

Description

Technical Field

[0001] The invention relates to the field of hydraulic grab buckets in areas with strong karst development, and in particular to a hydraulic grab bucket device in areas with strong karst development. Background Art

[0002] Areas with strong karst development refer to regions where underground karst phenomena are particularly developed. These areas usually have rich karst landforms, such as stalactites, caves, stone forests and underground rivers. The formation of karst is the result of the dissolution and precipitation, erosion and sedimentation of soluble rocks by groundwater and surface water, as well as gravity collapse, collapse and accumulation. This landform is widely distributed in the world. China's karst area is about 3.444 million square kilometers, accounting for about one-third of the country's land area. Among them, the southwestern karst mountainous area is one of the typical areas in the world with the largest karst distribution area and the most intense karst development.

[0003] Areas with strong karst development usually have the following characteristics: complex topography and landforms: due to karst action, the topography and landforms in these areas are diverse, and some places even have geological problems such as collapse, drought and waterlogging; fragile ecological environment: the ecological environment in karst areas is relatively fragile and easily affected by human activities, leading to environmental problems such as desertification; weak infrastructure: due to the complexity of the topography and ecology, the transportation and other infrastructure in these areas are relatively weak.

[0004] A search revealed that Chinese patent publication number CN103572791B discloses a grab bucket, a continuous wall hydraulic grab bucket slotting machine, and a grab bucket operation method. While the scraper can also compress the rock and soil during the grab bucket operation to squeeze out water, eliminating the need for additional tools and time to remove accumulated water within the grab bucket, further improving the grab bucket's efficiency and reducing its operating costs, it still uses mechanical extrusion to extract rock and soil. However, the ecological environment in highly karst-developed areas is relatively fragile. Mechanical extrusion can cause the rock and soil surrounding the grab bucket to press against the surrounding area, significantly increasing the scope of the grab's impact, thereby increasing the impact on highly karst-developed areas and causing more severe ecological damage to these areas. Furthermore, the installation of the grab bucket and external machinery is relatively complex. The terrain in highly karst-developed areas is complex, and external machinery adapted to the terrain must be installed with the grab bucket, resulting in operational drawbacks. Furthermore, the grab bucket cannot automatically adjust the dispersion speed of the rock and soil based on the opening and closing speed of the grab bucket, making it impossible for the two to automatically adapt to each other. This can easily lead to idling and soil compression, making it unsuitable for highly karst-developed areas. Summary of the Invention

[0005] The purpose of the present invention is to provide a hydraulic grab device for areas with strong karst development, so as to solve the problems raised in the above background technology.

[0006] The present invention provides the following technical solution: a hydraulic grab device for a karst-intensively developed area, comprising a first hinge block, wherein a first grab is fixedly connected to an outer surface of the first hinge block, and a second hinge block is rotatably sleeved on a central axis of the first hinge block, a second grab is fixedly connected to an outer surface of the second hinge block, both sides of the second grab are fixedly connected to fixed blocks on both sides of the first grab, and a connecting block is fixedly connected to the top surface of the first grab, a latch is engaged and sleeved on the side wall of the connecting block, one end of a telescopic rod is hingedly connected to the top surface of the first grab, a first piston is fixedly connected to the other end of the telescopic rod, a first sealed cylinder is slidably sleeved on the outer surface of the first piston, the top end of the first sealed cylinder is connected to a liquid pump, one end of a Y-shaped tube is fixedly connected to the output end of the liquid pump, the other two ends of the Y-shaped tube are connected to the second and third sealed cylinders, both ends of the second and third sealed cylinders are slidably sleeved with a push rod, one end of the push rod is fixedly connected to the second piston, and the other end of the push rod is hinged to the side wall of the fixed block;

[0007] A first reflux block is fixedly connected to the side wall of the first grab bucket, and a second reflux block is fixedly connected to the side wall of the second grab bucket. An inner cavity is provided in both the second reflux block and the first reflux block. A connecting pipe and a branch pipe are connected on both sides of the inner cavity. The top end of the connecting pipe is connected to the Y-shaped pipe, and the top end of the branch pipe is connected to the second sealed cylinder and the third sealed cylinder. A transmission shaft is rotatably connected between the inner cavities, and a paddle is fixed to the outer surface of the transmission shaft.

[0008] As a further solution of the present invention: the first grab bucket and the second grab bucket are symmetrically arranged, a first one-way valve is provided at the connection between the connecting pipe and the Y-shaped pipe, the second sealed cylinder and the first reflux block are connected through a branch pipe, and the third sealed cylinder and the second reflux block are connected through a branch pipe, and a second one-way valve is provided at the top of the branch pipe.

[0009] As a further solution of the present invention: the fixed block corresponds one-to-one to the push rod, the first sealed cylinder transports the liquid to the inner cavity through the liquid pump, the Y-shaped tube and the first one-way valve, and the inner cavity transports the liquid to the second sealed cylinder and the third sealed cylinder through the branch pipe and the second one-way valve.

[0010] As a further solution of the present invention: a plurality of blades are provided, and the plurality of blades are evenly distributed about the central axis of the transmission shaft, and the blades are slidably sleeved with the inner cavity.

[0011] As a further solution of the present invention: the telescopic rod is located below the connecting block, and the first closed cylinder drives the first grab bucket to rotate through the telescopic rod and the connecting block.

[0012] As a further solution of the present invention: an annular groove is opened in the side wall of the first grab bucket and the second grab bucket, a driving sprocket and a driven sprocket are rotatably connected between the side walls of the annular groove, a chain is meshed and sleeved between the driving sprocket and the driven sprocket, a scraper is fixed to the side wall of the chain, one end of the rotating shaft is fixed to the central axis of the driving sprocket, the other end of the rotating shaft is fixed to an acceleration gear, the outer surface of the acceleration gear is meshed and connected to the driving gear, and the driving gear is fixed to the transmission shaft.

[0013] As a further solution of the present invention: the transmission shaft extends into the annular groove, the driving gear and the acceleration gear are both rotatably connected to the annular groove, a plurality of scrapers are provided, and the plurality of scrapers are evenly distributed on the chain, and the scrapers are located in the first grab bucket and the second grab bucket.

[0014] As a further solution of the present invention: the scraper is slidably connected to the annular groove, and the scraper is perpendicular to the openings of the first grab bucket and the second grab bucket, and the driving gear drives the chain and the scraper to move through the acceleration gear, the rotating shaft and the driving sprocket.

[0015] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention drives the driving gear to rotate through the transmission shaft on the blade, so that the acceleration gear meshing with the driving gear rotates, and the acceleration gear drives the driving sprocket to rotate through the rotating shaft, so that the driving sprocket cooperates with the driven sprocket to drive the chain to rotate, so that the scraper on the chain moves, and then the scraper peels off the rock and soil on the ground. At this time, the restriction of the ground on the first grab bucket and the second grab bucket is greatly reduced, so that the first grab bucket and the second grab bucket can be closed to complete the grabbing of the rock and soil, so that the grabbing of the rock and soil does not use mechanical extrusion force, so that the rock and soil around the first grab bucket and the second grab bucket are not pressed toward the surrounding area, so that the range affected by the grabbing is only within the grabbing area, reducing the impact on the karst strongly developed area, and reducing the ecological damage in the karst strongly developed area.

[0017] 2. The present invention separates the latch from the connecting block, places the connection of the external machine between the connecting blocks, and resets the latch to complete the preliminary installation. Then, the top end of the first sealed cylinder is inserted into the reserved groove of the external machine, and the latch is used again for positioning to complete the installation of the hydraulic grab device. This makes the installation of the hydraulic grab device simple and convenient, so that the hydraulic grab device can be used on a variety of external machines. Even if the terrain in the karst-intensive development area is complex, it will not affect the use of the device.

[0018] 3. The present invention indirectly controls the rotation speed of the blades through a liquid pump, thereby increasing the rotation speed of the chain affected by the blades, thereby accelerating the speed of the scraper stripping the rock and soil, so that the opening and closing speed of the device can be automatically adapted to the dispersion speed of the rock and soil, thereby making it less likely for the scraper to idle and compress the rock and soil, and is fully suitable for areas with strong karst development. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a hydraulic grab bucket device for a strongly developed karst area according to the present invention;

[0020] Figure 2 Schematic diagram of the ring groove structure in an embodiment of the present invention;

[0021] Figure 3 In the embodiment of the present invention Figure 2 A magnified view of the structure of part A;

[0022] Figure 4 Schematic diagram of the scraper structure in an embodiment of the present invention;

[0023] Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure of part B;

[0024] Figure 6 In the embodiment of the present invention Figure 4 A magnified view of the structure of part C in the middle;

[0025] Figure 7 In the embodiment of the present invention Figure 4 A magnified view of the structure of part D in the middle;

[0026] Figure 8 This is a schematic diagram of the acceleration gear structure in an embodiment of the present invention;

[0027] Figure 9 Schematic diagram of the chain structure in an embodiment of the present invention.

[0028] In the figure: 1. first articulated block; 2. first grab bucket; 3. second articulated block; 4. second grab bucket; 5. fixed block; 6. connecting block; 7. latch; 8. telescopic rod; 9. first piston; 10. first sealed cylinder; 11. liquid pump; 12. Y-shaped tube; 13. second sealed cylinder; 14. third sealed cylinder; 15. second piston; 16. ejector rod; 17. first reflux block; 18. second reflux block; 19. connecting pipe; 20. branch pipe; 21. annular groove; 22. driving sprocket; 23. chain; 24. driven sprocket; 25. scraper; 26. transmission shaft; 27. paddle; 28. driving gear; 29. ​​acceleration gear; 30. rotating shaft. DETAILED DESCRIPTION

[0029] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] See also Figures 1-6 The present invention provides a technical solution: a hydraulic grab device in a karst-intensively developed area, comprising a first hinge block 1, a first grab 2 being fixedly connected to the outer surface of the first hinge block 1, and a second hinge block 3 being rotatably sleeved on the central axis of the first hinge block 1, a second grab 4 being fixedly connected to the outer surface of the second hinge block 3, both sides of the second grab 4 and both sides of the first grab 2 being fixedly connected to fixed blocks 5, and a connecting block 6 being fixedly connected to the top surface of the first grab 2, a latch 7 being engaged and sleeved on the side wall of the connecting block 6, and a telescopic rod 8 being hinged to the top surface of the first grab 2. End, the other end of the telescopic rod 8 is fixedly connected to the first piston 9, the outer surface of the first piston 9 is slidably sleeved with the first sealed cylinder 10, the top of the first sealed cylinder 10 is connected to the liquid pump 11, the output end of the liquid pump 11 is fixedly connected to one end of the Y-shaped tube 12, the other two ends of the Y-shaped tube 12 are connected to the second sealed cylinder 13 and the third sealed cylinder 14, both ends of the second sealed cylinder 13 and the third sealed cylinder 14 are slidably sleeved with a push rod 16, one end of the push rod 16 is fixedly connected to the second piston 15, and the other end of the push rod 16 is hinged to the side wall of the fixed block 5.

[0032] See also Figure 1 、 Figure 2 and Figure 7 The fixed block 5 corresponds to the push rod 16 one by one. The first sealed cylinder 10 transports the liquid to the inner cavity through the liquid pump 11, the Y-shaped tube 12 and the first one-way valve. The inner cavity transports the liquid to the second sealed cylinder 13 and the third sealed cylinder 14 through the branch pipe 20 and the second one-way valve.

[0033] See also Figure 1 The telescopic rod 8 is located below the connecting block 6, and the first closed tube 10 drives the first grab bucket 2 to rotate through the telescopic rod 8 and the connecting block 6.

[0034] Specifically, in the process of grabbing rock and soil, the liquid pump 11 is started, so that the liquid pump 11 extracts the liquid in the first sealed cylinder 10, and the liquid flows into the second sealed cylinder 13 and the third sealed cylinder 14 through the Y-shaped tube 12, so that the second piston 15 in the second sealed cylinder 13 and the third sealed cylinder 14 pushes the push rod 16 to both sides, thereby increasing the distance between the fixed blocks 5 on the push rod 16, so that the first grab 2 and the second grab 4 on the fixed block 5 have a tendency to close. At this time, the first grab 2 and the second grab 4 are in contact with the ground, so that the ground restricts the closing of the first grab 2 and the second grab 4, thereby increasing the hydraulic pressure at the first one-way valve, so that the liquid flows into the connecting pipe 19 through the first one-way valve, and is introduced into the inner cavity of the first reflux block 17 and the second reflux block 18 by the connecting pipe 19, so that the liquid drives the blade 27 to rotate, and finally the branch pipe 20 re-introduces the liquid into the second sealed cylinder 1 3 and the third closed cylinder 14, during the above process, as the paddle 27 rotates, the transmission shaft 26 on the paddle 27 drives the driving gear 28 to rotate, causing the acceleration gear 29 meshing with the driving gear 28 to rotate, so that the acceleration gear 29 drives the driving sprocket 22 to rotate through the rotating shaft 30, thereby causing the driving sprocket 22 to cooperate with the driven sprocket 24 to drive the chain 23 to rotate, so that the scraper 25 on the chain 23 moves, and then the scraper 25 peels off the rock and soil on the ground. At this time, the restriction of the ground on the first grab 2 and the second grab 4 is greatly reduced, so that the first grab 2 and the second grab 4 can be closed to complete the grabbing of the rock and soil, so that the grabbing of the rock and soil does not use mechanical extrusion force, so that the rock and soil around the first grab 2 and the second grab 4 are not pressed toward the surrounding area, so that the range affected by the grabbing is only within the grabbing area, reducing the impact on the karst strongly developed area and reducing the ecological damage in the karst strongly developed area.

[0035] Example 2

[0036] See also Figure 4 、 Figure 7 、 Figure 8 and Figure 9 The present invention provides a technical solution: a hydraulic grab device for a strongly developed karst area, wherein a first reflux block 17 is fixedly connected to the side wall of the first grab 2, and a second reflux block 18 is fixedly connected to the side wall of the second grab 4. The second reflux block 18 and the first reflux block 17 both have inner cavities, and connecting pipes 19 and branch pipes 20 are connected on both sides of the inner cavities. The top end of the connecting pipe 19 is connected to the Y-shaped pipe 12, and the top end of the branch pipe 20 is connected to the second sealed tube 13 and the third sealed tube 14. A transmission shaft 26 is rotatably connected between the inner cavities, and a paddle 27 is fixedly connected to the outer surface of the transmission shaft 26.

[0037] See also Figure 1 and Figure 4The first grab bucket 2 and the second grab bucket 4 are symmetrically arranged. A first one-way valve is provided at the connection between the connecting pipe 19 and the Y-shaped pipe 12. The second sealed cylinder 13 and the first reflux block 17 are connected through a branch pipe 20. The third sealed cylinder 14 and the second reflux block 18 are connected through a branch pipe 20. A second one-way valve is provided at the top of the branch pipe 20.

[0038] See also Figure 7 There are multiple blades 27, and the multiple blades 27 are evenly distributed about the central axis of the transmission shaft 26, and the blades 27 are slidably connected with the inner cavity.

[0039] Specifically, during the installation of the hydraulic grab device, the pin 7 is separated from the connecting block 6, and then the connection of the external machinery is placed between the connecting blocks 6, and the pin 7 is reset to complete the preliminary installation. Then, the top end of the first sealed cylinder 10 is inserted into the reserved groove of the external machinery, and the pin 7 is used again for positioning to complete the installation of the hydraulic grab device. This makes the installation of the hydraulic grab device simple and allows the hydraulic grab device to be applied to a variety of external machinery. Even if the terrain in the karst-strong development area is complex, it will not affect the use of the device.

[0040] Example 3

[0041] See also Figure 2 、 Figure 4 、 Figure 8 and Figure 9 The present invention provides a technical solution: a hydraulic grab device for a strongly developed karst area, wherein an annular groove 21 is formed in the side walls of the first grab 2 and the second grab 4, a driving sprocket 22 and a driven sprocket 24 are rotatably connected between the side walls of the annular groove 21, a chain 23 is meshed and sleeved between the driving sprocket 22 and the driven sprocket 24, a scraper 25 is fixed to the side wall of the chain 23, one end of a rotating shaft 30 is fixed to the central axis of the driving sprocket 22, the other end of the rotating shaft 30 is fixed to an acceleration gear 29, the outer surface of the acceleration gear 29 is meshed and connected to a driving gear 28, and the driving gear 28 is fixed to a transmission shaft 26.

[0042] See also Figure 2 and Figure 7 The transmission shaft 26 extends into the annular groove 21, and the driving gear 28 and the acceleration gear 29 are both rotatably connected to the annular groove 21. There are multiple scrapers 25, and the multiple scrapers 25 are evenly distributed on the chain 23, and the scrapers 25 are located in the first grab bucket 2 and the second grab bucket 4.

[0043] See also Figure 2 and Figure 8 The scraper 25 is slidably connected to the annular groove 21, and the scraper 25 is perpendicular to the openings of the first grab bucket 2 and the second grab bucket 4. The driving gear 28 drives the chain 23 and the scraper 25 to move through the acceleration gear 29, the rotating shaft 30 and the driving sprocket 22.

[0044] Specifically, during the closing process of the first grab 2 and the second grab 4, if the closing speed of the first grab 2 and the second grab 4 is accelerated, the speed of the liquid pump 11 extracting the liquid will be correspondingly accelerated, thereby indirectly accelerating the rotation speed of the blade 27, so that the rotation speed of the chain 23 affected by the blade 27 increases, and then the speed of the scraper 25 stripping the rock and soil is accelerated, so that the opening and closing speed of the device can be automatically adapted to the dispersion speed of the rock and soil, so that it is not easy for the scraper 25 to idle and compress the rock and soil, and it is fully suitable for areas with strong karst development.

[0045] The working principle and use process of the present invention are as follows: when the hydraulic grab bucket device needs to be installed, the latch 7 is separated from the connecting block 6, and then the connection part of the external machine is placed between the connecting blocks 6, and the latch 7 is reset to complete the preliminary installation. Then, the top end of the first sealed cylinder 10 is inserted into the reserved groove of the external machine, and the latch 7 is used again for positioning to complete the installation of the hydraulic grab bucket device. The installation of the hydraulic grab bucket device is simple, and the hydraulic grab bucket device can be used on a variety of external machines. Even if the terrain in the karst-intensive development area is complex, it will not affect the use of the device.

[0046] When it is necessary to grab rock and soil, the liquid pump 11 is started, so that the liquid pump 11 extracts the liquid in the first sealed cylinder 10, and the liquid flows into the second sealed cylinder 13 and the third sealed cylinder 14 through the Y-shaped tube 12, so that the second piston 15 in the second sealed cylinder 13 and the third sealed cylinder 14 pushes the push rod 16 to both sides, thereby increasing the distance between the fixed block 5 on the push rod 16, so that the first grab 2 and the second grab 4 on the fixed block 5 have a tendency to close, and at this time the first grab 2 and the second grab 4 are in contact with the ground, so that the ground restricts the closing of the first grab 2 and the second grab 4, thereby increasing the hydraulic pressure at the first one-way valve, so that the liquid flows into the connecting pipe 19 through the first one-way valve, and is introduced into the inner cavity of the first reflux block 17 and the second reflux block 18 by the connecting pipe 19, so that the liquid drives the paddle 27 to rotate, and finally the branch pipe 20 re-introduces the liquid into the second sealed cylinder 13 and the third sealed cylinder 14;

[0047] During the above process, as the blade 27 rotates, the transmission shaft 26 on the blade 27 drives the driving gear 28 to rotate, so that the acceleration gear 29 meshing with the driving gear 28 rotates, so that the acceleration gear 29 drives the driving sprocket 22 to rotate through the rotating shaft 30, so that the driving sprocket 22 cooperates with the driven sprocket 24 to drive the chain 23 to rotate, so that the scraper 25 on the chain 23 moves, and then the scraper 25 peels off the rock and soil on the ground. At this time, the restriction of the ground on the first grab 2 and the second grab 4 is greatly reduced, so that the first grab 2 and the second grab 4 can be closed to complete the grabbing of the rock and soil, so that the grabbing of the rock and soil does not use mechanical extrusion force, so that the rock and soil around the first grab 2 and the second grab 4 are not pressed toward the surrounding area, so that the range affected by the grabbing is only within the grabbing area, reducing the impact on the karst strongly developed area, and reducing the ecological damage in the karst strongly developed area;

[0048] During the above process, if the closing speed of the first grab bucket 2 and the second grab bucket 4 is accelerated, the speed of the liquid pump 11 extracting the liquid will be correspondingly accelerated, thereby indirectly accelerating the rotation speed of the blade 27, causing the rotation speed of the chain 23 affected by the blade 27 to increase, thereby accelerating the speed of the scraper 25 stripping the rock and soil, so that the opening and closing speed of the device can be automatically adapted to the dispersion speed of the rock and soil, thereby making it less likely for the scraper 25 to idle and compress the rock and soil. This is fully applicable to areas with strong karst development and completes the operation.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A hydraulic grab bucket device for areas with strong karst development, characterized in that: The invention comprises a first hinge block (1), the outer surface of the first hinge block (1) is fixedly connected to a first grab bucket (2), and a second hinge block (3) is rotatably sleeved on the central axis of the first hinge block (1), the outer surface of the second hinge block (3) is fixedly connected to a second grab bucket (4), both sides of the second grab bucket (4) and both sides of the first grab bucket (2) are fixedly connected to fixed blocks (5), and the top surface of the first grab bucket (2) is fixedly connected to a connecting block (6), the side wall of the connecting block (6) is engaged with a latch (7), the top surface of the first grab bucket (2) is hinged to one end of a telescopic rod (8), and the other end of the telescopic rod (8) is fixedly connected to a first A piston (9), wherein the outer surface of the first piston (9) is slidably sleeved with a first sealed cylinder (10), the top end of the first sealed cylinder (10) is connected to a liquid pump (11), one end of a Y-shaped tube (12) is fixedly connected to the output end of the liquid pump (11), the other two ends of the Y-shaped tube (12) are connected to a second sealed cylinder (13) and a third sealed cylinder (14), both ends of the second sealed cylinder (13) and both ends of the third sealed cylinder (14) are slidably sleeved with a push rod (16), one end of the push rod (16) is fixedly connected to the second piston (15), and the other end of the push rod (16) is hinged to the side wall of the fixed block (5); A first reflux block (17) is fixedly connected to the side wall of the first grab bucket (2), and a second reflux block (18) is fixedly connected to the side wall of the second grab bucket (4). An inner cavity is provided in both the second reflux block (18) and the first reflux block (17). A connecting pipe (19) and a branch pipe (20) are connected on both sides of the inner cavity. The top end of the connecting pipe (19) is connected to the Y-shaped pipe (12), and the top end of the branch pipe (20) is connected to the second sealed cylinder (13) and the third sealed cylinder (14). A transmission shaft (26) is rotatably connected between the inner cavities, and a paddle (27) is fixedly connected to the outer surface of the transmission shaft (26). An annular groove (21) is provided in the side walls of the first grab bucket (2) and the second grab bucket (4); a driving sprocket (22) and a driven sprocket (24) are rotatably connected between the side walls of the annular groove (21); a chain (23) is meshed and sleeved between the driving sprocket (22) and the driven sprocket (24); a scraper (25) is fixedly connected to the side wall of the chain (23); one end of a rotating shaft (30) is fixedly connected to the central axis of the driving sprocket (22); the other end of the rotating shaft (30) is fixedly connected to an acceleration gear (29); the outer surface of the acceleration gear (29) is meshed and connected to a driving gear (28); the driving gear (28) is fixedly connected to a transmission shaft (26); The transmission shaft (26) extends into the annular groove (21), the driving gear (28) and the acceleration gear (29) are both rotatably sleeved with the annular groove (21), a plurality of scrapers (25) are provided, and the plurality of scrapers (25) are evenly distributed on the chain (23), and the scrapers (25) are located in the first grab bucket (2) and the second grab bucket (4).

2. The hydraulic grab bucket device for karst-intensive areas according to claim 1, characterized in that: The first grab bucket (2) and the second grab bucket (4) are symmetrically arranged. A first one-way valve is provided at the connection between the connecting pipe (19) and the Y-shaped pipe (12). The second sealed cylinder (13) and the first reflux block (17) are connected via a branch pipe (20). The third sealed cylinder (14) and the second reflux block (18) are connected via a branch pipe (20). A second one-way valve is provided at the top end of the branch pipe (20).

3. The hydraulic grab bucket device for karst-intensive areas according to claim 1, characterized in that: The fixed block (5) corresponds to the push rod (16) one by one. The first sealed cylinder (10) transports liquid to the inner cavity through the liquid pump (11), the Y-shaped tube (12) and the first one-way valve. The inner cavity transports liquid to the second sealed cylinder (13) and the third sealed cylinder (14) through the branch pipe (20) and the second one-way valve.

4. The hydraulic grab bucket device for areas with strong karst development according to claim 1, characterized in that: A plurality of blades (27) are provided, and the plurality of blades (27) are evenly distributed about the central axis of the transmission shaft (26), and the blades (27) are slidably sleeved with the inner cavity.

5. The hydraulic grab bucket device for areas with strong karst development according to claim 1, characterized in that: The telescopic rod (8) is located below the connecting block (6), and the first sealed cylinder (10) drives the first grab bucket (2) to rotate through the telescopic rod (8) and the connecting block (6).

6. The hydraulic grab bucket device for areas with strong karst development according to claim 1, characterized in that: The scraper (25) is slidably sleeved with the annular groove (21), and the scraper (25) is perpendicular to the openings of the first grab bucket (2) and the second grab bucket (4). The driving gear (28) drives the chain (23) and the scraper (25) to move through the acceleration gear (29), the rotating shaft (30) and the driving sprocket (22).

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