Underwater rapid soil sampling device suitable for ecological sensitive area

Abstract

The utility model relates to the technical field of building construction, in particular to an underwater rapid soil sampling device suitable for an ecological sensitive area. Comprising an isolation cover which is a hollow cavity with an opening in the lower end; the flushing structure is arranged in the isolation hood and used for flushing and crushing the soil body in the isolation hood; the inlet end of the mud suction structure penetrates through the isolation hood and extends to the inner side of the isolation hood, and the mud suction structure is used for forming negative pressure in the isolation hood to suck the washed and crushed soil in the isolation hood. The soil sampling device is simple in structure and convenient to use, a closed soil sampling environment can be constructed underwater, any interference and pollution cannot be caused to an ecological sensitive area in the soil sampling process, and the good environmental protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an underwater rapid soil taking device suitable for ecologically sensitive areas. Background Art

[0002] With the continuous development of engineering construction, the number of deepwater environmental engineering construction projects is increasing. At present, grab buckets are mostly used for excavation in the process of foundation pit excavation under deepwater conditions. For hard soil, blasting assistance + grab bucket excavation and other methods are used. The above excavation methods fail to isolate the excavated soil or slurry from the water body, which will cause certain pollution to the surrounding waters. If blasting assistance is used for excavation, the shock wave generated by the blasting will have an adverse effect on aquatic organisms.

[0003] For example, the Chinese utility model patent with the patent number of "CN 210482341U" and the title of "A gas-water mixed jet soil breaking and mud suction device" discloses a mud suction device, which includes a first shell, a water pipe, a plurality of nozzles and a mud suction conduit. The first shell is a three-dimensional structure with a hollow interior and a closed structure. The interior of the first shell is connected to the air outlet of a first air compressor; the upper end of the water pipe is connected to the water outlet of a water pump with a water tank, and the lower end of the water pipe extends into the interior of the first shell; the plurality of nozzles are all located below the first shell, and any nozzle includes the first The inner tube body and the first outer tube body sleeved on the outside of the first inner tube body, the upper end of the first outer tube body is connected to the interior of the first shell, the upper end of the first inner tube body extends into the first shell, and the upper end of any first inner tube body is connected to the lower end of the water pipe; the upper end of the mud suction conduit is connected to the mud discharge pipe located above the first shell, and the lower end vertically penetrates the first shell and extends to the bottom of the first shell, and the lower end surface of the mud suction conduit is higher than the lower end surface of any nozzle; a plurality of air inlets are arranged on the outer wall of the mud suction conduit, and any air inlet is located inside the first shell. The mud suction device actually inputs high-pressure gas to the nozzle, the nozzle blows up the mud at the bottom, and the mud suction conduit sucks away the mud below. The mud suction device can be used in deep water to absorb mud very well, but the device also has a big problem, that is, the nozzle sprays high-pressure gas to purge the mud below, there is no shielding structure outside, the blown mud cannot be completely sucked away by the mud suction conduit, and the mud swept by the high-pressure gas is easy to spread around, further expanding the scope of pollution. At present, the awareness of environmental protection is constantly increasing during the construction process, especially in ecologically sensitive areas, which puts forward more stringent requirements for construction. The current equipment cannot carry out pollution-free soil or mud suction in ecologically sensitive areas. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the above-mentioned background technology and provide an underwater rapid soil taking device suitable for ecologically sensitive areas.

[0005] The technical solution of the utility model is: an underwater rapid soil taking device suitable for ecologically sensitive areas, comprising:

[0006] An isolation cover, wherein the isolation cover is a hollow cavity with an opening at the lower end;

[0007] A flushing structure, which is arranged in the isolation cover and is used to flush and crush the soil in the isolation cover;

[0008] The mud suction structure has an inlet end that passes through the isolation cover and extends to the inside of the isolation cover, and is used to form a negative pressure in the isolation cover to suck the washed and broken soil in the isolation cover.

[0009] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the isolation cover is a hollow cavity structure with a closed upper end and side walls and an open lower end, and a blade foot is provided at the lower end of the isolation cover.

[0010] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the flushing structure includes:

[0011] A high-pressure water pipe, which is a pipe structure that is passed through the isolation cover and is used to provide a high-pressure flushing water flow;

[0012] A plurality of high-pressure nozzles are connected to the high-pressure water pipe, the high-pressure nozzles are arranged on the inner wall of the isolation cover and are arranged downward, and the plurality of high-pressure nozzles are arranged at intervals along the circumferential direction of the lower end of the isolation cover.

[0013] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the high-pressure nozzle is located at the blade foot position of the isolation cover.

[0014] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the mud suction structure comprises:

[0015] A mud suction pipe, the lower end of which vertically penetrates the isolation cover and extends to the inner side of the isolation cover, and the upper end of which is connected to the negative pressure suction equipment.

[0016] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the mud suction pipe is located in the center of the isolation cover.

[0017] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the vertical spacing between the lower end of the mud suction pipe and the lower end of the isolation cover is within a set range.

[0018] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, an auxiliary structure for injecting high-pressure gas into the isolation cover to assist suction when the mud suction pipe is suctioning is provided in the isolation cover.

[0019] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the auxiliary structure includes:

[0020] A high-pressure air pipe, wherein the lower end of the high-pressure air pipe is vertically penetrated through the isolation cover and extends to the inner side of the isolation cover, and the upper end of the high-pressure air pipe is connected to the high-pressure air supply equipment.

[0021] According to an underwater rapid soil extraction device suitable for ecologically sensitive areas provided in the present application, the high-pressure air pipe and the mud suction pipe are arranged in parallel, and the outlet end of the high-pressure air pipe is suspended above the inlet end of the mud suction pipe.

[0022] The advantages of the present application are as follows: 1. The soil taking device of the present application is provided with an isolation cover, and the soil taking position is isolated from the external environment by using the isolation cover. The flushing structure in the isolation cover flushes and crushes the silt and soil, and the mud suction structure sucks the crushed soil out of the isolation cover. All operations are performed in the isolation cover, and no pollutants will be discharged into sensitive areas, and no pollution will be caused to ecologically sensitive areas. It has good environmental protection effects, is simple to operate, and is easy to use, and has great promotion value;

[0023] 2. The lower end of the isolation cover of the present application is provided with a blade foot, which facilitates the isolation cover to be quickly inserted into the soil after being lowered to the bottom of the water. The inside and outside of the isolation cover are isolated from each other, and the operation inside the isolation cover will not cause any pollution to the outside, which is extremely convenient to use;

[0024] 3. The flushing structure of the present application is to flush and crush the soil in the isolation cover through the combined structure of high-pressure water pipes and high-pressure nozzles. The high-pressure water pipes and high-pressure nozzles have excellent flushing and crushing effects on the soil, which facilitates the subsequent mud suction structure to suck the soil in the isolation cover, and the efficiency of soil extraction is extremely high;

[0025] 4. The high-pressure nozzle of the present application is located at the blade foot. The high-pressure nozzle sprays high-pressure water from the blade foot toward the center of the isolation cover, which can wash and crush the soil in the isolation cover to the greatest extent, and the soil extraction degree and range are higher;

[0026] 5. The mud suction structure of the present application includes a mud suction pipe, which has a simple structure. By connecting the negative pressure suction device, the mud suction pipe is extended into the isolation cover, and the broken soil in the isolation cover can be quickly sucked. The overall operation is very simple, and the efficiency of soil extraction and mud suction is extremely high;

[0027] 6. The mud suction pipe of the present application is located in the center of the isolation cover, and the high-pressure nozzle washes and crushes from the blade foot position to the center, and the crushed soil is concentrated in the center of the isolation cover. Therefore, the mud suction pipe can absorb and discharge the crushed soil to the greatest extent. The mud suction pipe structure of the present application is reasonably arranged, and the soil extraction efficiency is extremely high;

[0028] 7. The lower end of the mud suction pipe of the present application is suspended above the blade foot, just in the position where the broken mud and sand are concentrated, which is convenient for the mud suction pipe to quickly absorb the mud and discharge it, further increasing the efficiency of soil extraction of the entire device;

[0029] 8. The present application sets an auxiliary structure in the isolation cover, which can inject high-pressure gas into the isolation cover when the mud suction pipe sucks mud, to assist the mud suction pipe in taking soil, and avoid the problem of suction difficulty due to excessive negative pressure in the isolation cover. The injected high-pressure gas can also further disturb the soil, which is convenient for the mud suction pipe to suck;

[0030] 9. The auxiliary structure of the present application is extremely simple. The auxiliary operation of taking soil from the mud suction pipe can be realized by passing the high-pressure air pipe in the isolation cover. The overall layout is very simple and it is extremely convenient to use.

[0031] 10. In the present application, the high-pressure air pipe and the mud suction pipe are arranged in parallel. The outlet end of the high-pressure air pipe is suspended above the inlet end of the mud suction pipe. The high-pressure air pipe discharges high-pressure gas downward to disturb the soil below to the greatest extent. At the same time, it assists the mud suction pipe to absorb the soil more timely, further improving the efficiency of soil extraction.

[0032] The soil collecting device of the present application has a simple structure and is easy to use. It can construct a closed soil collecting environment underwater. The soil collecting process will not cause any interference or pollution to ecologically sensitive areas. It has good environmental protection effects and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 : A schematic diagram of the structure of the soil taking device of the present application;

[0034] Among them: 1—isolation cover; 2—high-pressure water pipe; 3—high-pressure nozzle; 4—mud suction pipe; 5—high-pressure air pipe. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] The present application relates to an underwater rapid soil-collecting device suitable for ecologically sensitive areas. The soil-collecting device of the present application is used for underwater soil-collecting operations in ecologically sensitive areas. The soil-collecting device of the present application first constructs a closed environment at the bottom of the water when collecting soil. The entire soil-collecting process is carried out in the closed environment. No pollutants will be discharged into the ecologically sensitive areas during the soil-collecting process. The device has a good environmental protection effect, and the entire soil-collecting operation is very simple and extremely convenient to use.

[0040] Specifically, Figure 1 As shown, the underwater rapid soil extraction device suitable for ecologically sensitive areas of the present application includes an isolation cover 1, a flushing structure and a mud suction structure. The isolation cover 1 is a hollow cavity with an opening at the lower end, and the isolation cover 1 is the main equipment for constructing a closed soil extraction environment; the flushing structure is arranged in the isolation cover 1 to flush and crush the soil in the isolation cover 1, and the flushing structure flushes and crushes the soil in the area covered by the isolation cover 1 to facilitate subsequent soil extraction and mud suction operations; the inlet end of the mud suction structure passes through the isolation cover 1 and extends to the inner side of the isolation cover 1, and is used to form a negative pressure in the isolation cover 1 to suck the flushed and crushed soil in the isolation cover 1.

[0041] The isolation cover 1 of the present application forms a closed environment at the bottom of the water. The flushing structure flushes and crushes the soil in the isolation cover 1, and the mud suction structure performs suction in the isolation cover 1, so that the crushed soil is sucked out of the isolation cover 1 to complete the soil extraction operation. The entire operation process is carried out in the isolation cover 1, and neither the crushing nor the suction will cause any impact on the ecologically sensitive environment outside the isolation cover 1.

[0042] During actual operation, the soil taking device is assembled on the water surface, and then the isolation cover 1 is lowered to the bottom of the water as a whole, so that the lower end of the isolation cover 1 is inserted into the mud at the bottom of the water. After the isolation cover 1 forms a closed environment at the bottom of the water, the mud in the isolation cover 1 is flushed through the flushing structure to break the mud in the isolation cover 1 and fill it into the isolation cover 1. Then the mud suction structure is started, and the mud suction structure generates negative pressure in the isolation cover 1 to suck the inside of the isolation cover 1, so that the broken mud in the isolation cover 1 is discharged through the mud suction structure to complete the soil taking operation.

[0043] In some embodiments of the present application, the structure of the isolation cover 1 is optimized. Figure 1 As shown, the isolation cover 1 of this embodiment is a hollow cavity structure with a closed upper end and side walls and an open lower end, and a blade foot is provided at the lower end of the isolation cover 1.

[0044] The isolation cover 1 of this embodiment can be a square component or a cylindrical component. The isolation cover 1 includes a top plate and a side plate, wherein the lower end of the side plate is provided with a blade foot. The blade foot is provided at the lower end of the isolation cover 1, and the blade foot facilitates the isolation cover 1 to be quickly inserted into the soil after being lowered to the bottom of the water. The inner and outer sides of the isolation cover 1 are isolated from each other, and the operation inside the isolation cover 1 will not cause any pollution to the outside, and it is extremely convenient to use.

[0045] In other embodiments of the present application, the present embodiment optimizes the above-mentioned flushing structure, specifically, Figure 1 As shown, the flushing structure of this embodiment includes a high-pressure water pipe 2 and a plurality of high-pressure nozzles 3. The high-pressure water pipe 2 is a pipeline structure that passes through the isolation cover 1 and is used to provide a high-pressure flushing water flow; the high-pressure nozzle 3 is connected to the high-pressure water pipe 2, and the high-pressure nozzle 3 is arranged on the inner wall of the isolation cover 1 and arranged downward, and the plurality of high-pressure nozzles 3 are arranged at intervals along the circumference of the lower end of the isolation cover 1.

[0046] The high-pressure water pipe 2 is arranged on the inner wall of the isolation cover 1, that is, the high-pressure water pipe 2 will not occupy the middle space inside the isolation cover 1, and will not affect the adsorption of mud and sand by the mud suction structure. At the same time, in order to facilitate the crushing of the soil in the isolation cover 1, the high-pressure nozzle 3 of this embodiment is at the blade foot position of the isolation cover 1. In actual use, the high-pressure nozzle 3 sprays high-pressure water flow at the blade foot position, and the high-pressure water flow crushes and washes the soil in the isolation cover 1, which can impact the soil to the center position of the isolation cover 1, forcing the crushed soil to be moved to the middle position of the isolation cover 1, so that the mud suction structure can quickly suck it out.

[0047] In a further embodiment of the present application, the above-mentioned mud suction structure is optimized. Specifically, Figure 1As shown, the mud suction structure of this embodiment includes a mud suction pipe 4, the lower end of the mud suction pipe 4 vertically penetrates the isolation cover 1 and extends to the inner side of the isolation cover 1, and the upper end of the mud suction pipe 4 is connected to the negative pressure suction equipment.

[0048] The upper end of the mud suction pipe 4 is connected to the negative pressure suction equipment. When the high-pressure nozzle 3 breaks the soil in the isolation cover 1, the broken soil will flow to the middle position of the isolation cover 1, and the negative pressure suction equipment starts to work. The lower end of the mud suction pipe 4 extends into the isolation cover 1 to draw negative pressure inside the isolation cover 1, so that the broken soil in the isolation cover 1 is sucked out of the isolation cover 1 through the mud suction pipe 4, completing the soil removal operation inside the isolation cover 1.

[0049] In order to more efficiently suck the soil in the isolation cover 1, the mud suction pipe 4 of this embodiment is located in the center of the isolation cover 1. The high-pressure nozzle 3 surrounding the blade foot of the isolation cover 1 sprays high-pressure water flow toward the center of the isolation cover 1, breaking the broken mud in the isolation cover 1 to gather at the center of the isolation cover 1. When the mud suction pipe 4 is in the middle position of the isolation cover 1, the broken mud can be sucked out most efficiently and quickly.

[0050] In addition, the vertical spacing between the lower end of the mud suction pipe 4 and the lower end of the isolation cover 1 in this embodiment is within the set range. In actual use, the set range is 1 / 4 to 1 / 3 of the height of the isolation cover 1. The purpose of this setting is to suspend the lower end of the mud suction pipe 4 above the lower end of the isolation cover 1, because the high-pressure water flow sprayed by the high-pressure nozzle 3 will cause the broken soil to be lifted up. If the lower end of the mud suction pipe 4 is too close to the lower end of the isolation cover 1, it is difficult for the mud suction pipe 4 to absorb the lifted broken soil. If the lower end of the mud suction pipe 4 is too close to the upper end of the isolation cover 1, the lower end of the mud suction pipe 4 is higher than the maximum height of the lifted soil, and the mud suction pipe 4 is also difficult to absorb the broken soil. Only when the lower end of the mud suction pipe 4 is at a suitable height position can the broken soil be absorbed to the maximum extent. The set range of this embodiment is 1 / 4 to 1 / 3 of the height of the isolation cover 1. In actual application, it is not limited to such a set range, as long as it can meet the above requirements.

[0051] In a preferred embodiment of the present application, an auxiliary structure for injecting high-pressure gas into the isolation cover 1 to assist suction when the mud suction pipe 4 is sucking is provided in the isolation cover 1. The mud suction pipe 4 allows soil to be taken in the isolation cover 1 by negative pressure suction. If the airtightness in the isolation cover 1 is good, the negative pressure in the isolation cover 1 becomes larger and larger under the continuous suction of the mud suction pipe 4, and the mud suction pipe 4 may be difficult to suck due to the crushed soil sprayed by the high-pressure nozzle 3. Therefore, the problem of difficulty in suction by the mud suction pipe 4 may occur. Therefore, the auxiliary structure is provided in the isolation cover 1 in the present embodiment, and high-pressure gas is sprayed into the isolation cover 1 to avoid the problem of difficulty in suction. At the same time, spraying high-pressure gas into the isolation cover 1 can further disturb the crushed soil, forcing the crushed soil to further disperse, and facilitating the suction of the mud suction pipe 4.

[0052] Specifically, Figure 1 As shown, the auxiliary structure of this embodiment includes a high-pressure air pipe 5, the lower end of which is vertically penetrated through the isolation cover 1 and extends to the inside of the isolation cover 1, and the upper end of the high-pressure air pipe 5 is connected to a high-pressure gas supply device. The high-pressure gas supply device provides high-pressure gas to the high-pressure air pipe 5, and the high-pressure gas is sprayed into the isolation cover 1. The auxiliary mud suction pipe 4 performs an adsorption operation on the broken mud in the isolation cover 1, and the overall adsorption and soil extraction efficiency is improved.

[0053] In addition, for the convenience of arrangement, the high-pressure air pipe 5 of this embodiment is arranged in parallel with the mud suction pipe 4, and the outlet end of the high-pressure air pipe 5 is suspended above the inlet end of the mud suction pipe 4. The high-pressure air pipe 5 and the mud suction pipe 4 are arranged in parallel to reduce the space occupied by the high-pressure air pipe 5, avoiding obstruction of the crushed soil. The lower end of the high-pressure air pipe 5 is suspended above the lower end of the mud suction pipe 4, which can ensure that the high-pressure gas ejected from the high-pressure air pipe 5 further disturbs the crushed soil and improves the adsorption efficiency of the mud suction pipe 4. If the lower end of the high-pressure air pipe 5 exceeds the lower end of the mud suction pipe 4, the high-pressure gas ejected from the high-pressure air pipe 5 may eject the crushed soil to other positions, which is not conducive to the adsorption of the mud suction pipe 4.

[0054] In actual use, the soil taking device is assembled on the water surface, and the mud suction pipe 4, the high-pressure air pipe 5, the high-pressure water pipe 2 and the high-pressure nozzle 3 are arranged in the isolation cover 1, wherein the high-pressure nozzle 3 is arranged at the blade foot position of the isolation cover 1, the high-pressure water pipe 2 is arranged on the inner wall of the isolation cover 1, the mud suction pipe 4 and the high-pressure air pipe 5 are arranged side by side in the middle of the isolation cover 1, the distance between the lower end of the mud suction pipe 4 and the lower end of the isolation cover 1 is within a set range, and the lower end of the high-pressure air pipe 5 is suspended above the lower end of the mud suction pipe 4;

[0055] The earth-taking device is slowly lowered by hoisting equipment on the water surface, and the isolation cover 1 is slowly lowered to the bottom of the water at the designated position. The blade foot is first sunk into the soil by relying on the dead weight of the isolation cover 1, and then the mud suction pipe 4 is opened to suck the inside of the isolation cover 1 to form a negative pressure in the isolation cover 1, further promoting the sinking of the blade foot. After the isolation cover 1 is completely stable on the bottom of the water, the high-pressure nozzle 3 is opened to wash and crush the soil in the isolation cover 1 to form a mud-water mixture. The mud suction pipe 4 is opened and starts to suck the crushed and raised soil in the isolation cover 1. The high-pressure air pipe 5 can also be opened for cooperation. The mud suction pipe 4 discharges the mud-water mixture to the outside of the isolation cover 1 to complete the earth-taking operation inside the isolation cover 1.

[0056] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An underwater rapid soil extraction device suitable for ecologically sensitive areas, characterized by: include, An isolation cover (1), wherein the isolation cover (1) is a hollow cavity with an opening at the lower end; A flushing structure, wherein the flushing structure is arranged in the isolation cover (1) and is used to flush and crush the soil in the isolation cover (1); A mud suction structure, wherein the inlet end of the mud suction structure passes through the isolation cover (1) and extends to the inside of the isolation cover (1), and is used to form a negative pressure in the isolation cover (1) to suck the washed and crushed soil in the isolation cover (1); The isolation cover (1) is a hollow cavity structure with a closed upper end and side walls and an open lower end, and a blade foot is provided at the lower end of the isolation cover (1).

2. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 1, characterized in that: The flushing structure comprises: A high-pressure water pipe (2), wherein the high-pressure water pipe (2) is a pipe structure that is inserted through the isolation cover (1) and is used to provide a high-pressure flushing water flow; A plurality of high-pressure nozzles (3) are connected to the high-pressure water pipe (2). The high-pressure nozzles (3) are arranged on the inner wall of the isolation cover (1) and are arranged downward. The plurality of high-pressure nozzles (3) are arranged at intervals along the circumference of the lower end of the isolation cover (1).

3. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 2, characterized in that: The high-pressure nozzle (3) is located at the blade foot position of the isolation cover (1).

4. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 1, characterized in that: The mud suction structure comprises: A mud suction pipe (4), wherein the lower end of the mud suction pipe (4) vertically penetrates the isolation cover (1) and extends to the inner side of the isolation cover (1), and the upper end of the mud suction pipe (4) is connected to a negative pressure suction device.

5. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 4, characterized in that: The mud suction pipe (4) is located at the center of the isolation cover (1).

6. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 5, characterized in that: The vertical distance between the lower end of the mud suction pipe (4) and the lower end of the isolation cover (1) is within a set range.

7. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 4, characterized in that: The isolation cover (1) is provided with an auxiliary structure for injecting high-pressure gas into the isolation cover (1) to assist suction when the mud suction pipe (4) is suctioning.

8. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 7, characterized in that: The auxiliary structure comprises: A high-pressure gas pipe (5), wherein the lower end of the high-pressure gas pipe (5) is vertically penetrated through the isolation cover (1) and extends to the inside of the isolation cover (1), and the upper end of the high-pressure gas pipe (5) is connected to a high-pressure gas supply device.

9. The underwater rapid soil extraction device suitable for ecologically sensitive areas as claimed in claim 8, characterized in that: The high-pressure air pipe (5) and the mud suction pipe (4) are arranged in parallel, and the outlet end of the high-pressure air pipe (5) is suspended above the inlet end of the mud suction pipe (4).

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