Water conservancy project detection sampling device

Abstract

The invention provides a hydraulic engineering detection sampling device, and relates to the technical field of sampling devices. The device comprises a floating assembly, a main sampling assembly, an extraction assembly, a shifting assembly, a crushing assembly and an auxiliary sampling assembly, wherein the floating assembly is used for measuring the sampling depth by floating on the water surface; the main sampling assembly is arranged under the floating assembly and is used for sampling water; the main sampling assembly comprises a main shell, a fixed seat is fixedly connected to the center of the upper part of the main shell, a guide cylinder is fixedly connected to the center of the interior of the main shell, a circular electromagnet is fixedly mounted on the top wall of the guide cylinder, an extraction spring is fixedly connected to the interior of the guide cylinder, and a sampling cylinder is arranged in the main shell; and the upper part of the sampling barrel is fixedly connected with a sampling head. By arranging the main sampling assembly, the main sampling assembly is provided with a plurality of sampling barrels, a plurality of samples can be taken at a time, and the sampling efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, and particularly to a sampling device for water conservancy project detection. Background Art

[0002] There are various organic and inorganic substances in natural water bodies, which have important impacts on the quality and function of water bodies. Sampling and analyzing water bodies is the basis and key of environmental monitoring, and they directly affect the authenticity and accuracy of monitoring data. Therefore, in water conservancy project detection, it is necessary to sample water bodies and use sampling devices.

[0003] In related technologies, such as a sampling device for water quality detection with the publication number: CN118243889B, which includes a sampler body, a plug body and a float assembly. A cavity for accommodating water bodies is formed in the sampler body, and a water inlet is opened at the bottom of the sampler body. This sampling device can avoid impurities such as floating objects or oil films floating on the water surface from being collected into the sampler body, and can improve the detection efficiency and accuracy of water bodies.

[0004] Another example is a water quality detection sampling device with the publication number: CN119269178B, which includes a housing, a filter rack, a sampling assembly, and a floating body. The housing is in a cylindrical hollow structure, and the floating body is installed in the middle of the outer side of the housing. The floating body is used to drive the housing to float on the water surface; this sampling device can perform stratified sampling of water quality at different heights.

[0005] When sampling water quality, for surface water, it is usually sampled at a depth of 0.3 - 0.5 meters below the water surface to avoid collecting the foam or oil film generated due to the aging and death of algae on the surface. For data verification, at least two samples need to be collected for each batch. However, the existing sampling devices can only take one sample at a time and need to be collected multiple times, resulting in low collection efficiency. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a sampling device for water conservancy project detection, which solves the problem that the existing sampling devices can only take one sample at a time and have low collection efficiency.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A sampling device for water conservancy project detection, comprising: A floating assembly, which is used to float on the water surface to measure the sampling depth; A main sampling assembly, which is arranged directly below the floating assembly and is used to sample water quality; The main sampling assembly includes a main housing, a fixing seat fixedly connected at the center of the upper portion of the main housing, a guide cylinder fixedly connected at the center of the interior of the main housing, a circular electromagnet fixedly mounted on the top wall of the guide cylinder, an extraction spring fixedly connected inside the guide cylinder, a sampling cylinder provided inside the main housing, a sampling head fixedly connected to the upper portion of the sampling cylinder, the sampling head passing through the upper side wall of the main housing, a filter provided on the top of the main housing, and a microcontroller, a relay, a rechargeable battery, and a wireless module provided inside the main housing; an extraction assembly, the extraction assembly being disposed at the lower portion of the main housing and being used to generate an extraction force; The extraction assembly includes an operating frame, a piston is fixedly provided on the upper portion of the operating frame, an intermediate column is fixedly connected to the center of the operating frame, a permanent magnet is provided on the upper portion of the intermediate column, and the magnetic properties of the permanent magnet and the circular electromagnet are opposite; A weeding assembly is provided on the outside of the operating frame and is used for weeding and cutting; A crushing assembly, which is arranged at the bottom of the support frame and is used to crush weeds; The secondary sampling assembly, located between the paddle and the main housing, is used to sample weeds. The floating assembly, combined with the primary sampling assembly, measures the depth of the sampling location to ensure accurate sampling. The primary sampling assembly has multiple sampling tubes, allowing for simultaneous sampling of multiple samples, resulting in higher sampling efficiency.

[0008] Preferably, the floating assembly includes a floating box, the upper part of the floating box is detachably connected to an upper cover, the upper cover is fixedly connected to a handle, the outer side of the floating box is fixedly connected to a floating ring, an ultrasonic sensor, a single-chip microcomputer, and a BLE ultrasonic module are provided in the floating box, a support tube is fixedly connected at the lower center of the floating box, a sampling rope is passed through the floating box, and the lower end of the sampling rope is fixedly connected to a fixing seat.

[0009] Preferably, a counterweight plate for supporting the sampling tube is provided inside the main shell, and the filter element includes a protective plate fixedly mounted on the top of the main shell, a blocking ring is fixedly connected to the protective plate, a filter hole is provided on the inner side of the blocking ring, and an elastic ring is provided at the edge of the protective plate.

[0010] Preferably, the piston member includes a piston rod fixedly mounted on the upper part of the operating frame, the piston rod is inserted into the sampling cylinder and the upper end is fixedly connected to a piston head, the upper part of the piston head is fixedly connected to a sealing block, the sealing block is fixedly connected to a blocking needle, and the blocking needle can pass through the filter hole.

[0011] Preferably, the crushing assembly includes a fixing ring fixedly mounted on the bottom of the support frame, the lower portion of the fixing ring is threadedly connected to a crushing head, an operating notch is provided on the crushing head, and a crushing blade is provided on the outer surface of the crushing head.

[0012] Preferably, the shifting assembly includes a support frame fixedly mounted on the bottom of the main shell, the lower part of the support frame is rotatably connected to a shift claw, the upper part of the shift claw is fixedly connected to an elastic band, the inner end of the elastic band is fixedly connected to the top of the main shell, the upper part of the shift claw is provided with an arc-shaped portion, the outer side surface of the arc-shaped portion is fixedly connected to a cutting portion, a lifting frame is provided on the inner side of the support frame, the lifting frame is fixedly connected to the operating frame, the lifting frame is rotatably connected to a lifting wheel at one end close to the shift claw, and the lifting wheel is in rolling contact with the shift claw.

[0013] Preferably, the auxiliary sampling assembly includes a sampling bag, both sides of the sampling bag are fixedly connected with connecting ropes, and the upper opening of the sampling bag is provided with an arc-shaped edge.

[0014] Preferably, the sampling bag is evenly provided with hole structures for water to flow through.

[0015] The present invention provides a water conservancy project detection sampling device, which has the following beneficial effects: The present invention provides a floating component and a main sampling component. The floating component can measure the depth of the sampling position to ensure the accuracy of the sampling depth. The main sampling component has multiple sampling cylinders and can take multiple samples at one time, which has higher sampling efficiency.

[0016] The present invention provides an extraction component, which can accelerate the flow of water into the sampling tube, shorten the sampling time, and improve the sampling efficiency.

[0017] The present invention provides a separating component and a crushing component. By utilizing the separating component and the crushing component, the aquatic plant impurities floating on the water surface can be separated and cut, thereby preventing the aquatic plant impurities from affecting the sampling process and ensuring smooth sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall three-dimensional diagram of the present invention; Figure 2 It is an overall three-dimensional diagram from the bottom perspective of the present invention; Figure 3 It is an overall exploded perspective view of the present invention; Figure 4 is an exploded perspective view of the floating assembly of the present invention; Figure 5 is an exploded perspective view of the secondary sampling assembly of the present invention; Figure 6 A perspective view of the shifting assembly of the present invention; Figure 7 is a cutaway perspective view of the main sampling assembly of the present invention; Figure 8 A perspective view of an extraction assembly of the present invention; Figure 9 A perspective view of a crushing assembly according to the present invention; Figure 10 is a control logic diagram of the extraction program of the present invention; Figure 11 This is a control logic diagram of the ranging program of the present invention.

[0019] Among them, 1. Floating component; 2. Secondary sampling component; 3. Dividing component; 4. Main sampling component; 5. Extraction component; 6. Crushing component; 101. Upper cover; 102. Handle; 103. Floating ring; 104. Floating box; 105. Ultrasonic sensor; 106. Support tube; 107. Sampling rope; 201. Sampling bag; 202. Connecting rope; 203. Arc edge; 301. Digging claw; 302. Elastic band; 303. Arc part; 304. Cutting part; 305. Support frame; 306. Lifting frame; 307. Lifting wheel ;401, main shell; 402, sampling cylinder; 4021, sampling head; 403, protective plate; 4031, elastic ring; 404, blocking ring; 405, filter hole; 406, fixing seat; 407, circular electromagnet; 408, extraction spring; 409, guide cylinder; 410, counterweight plate; 501, operating frame; 502, piston rod; 503, piston head; 504, sealing block; 505, blocking needle; 506, intermediate column; 507, permanent magnet; 601, fixing ring; 602, crushing head; 603, operating notch. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1-11 As shown, an embodiment of the present invention provides a water conservancy project detection sampling device, comprising: The floating component 1 is used to measure and sample the depth while floating on the water surface. The floating component 1 includes a floating box 104. The upper part of the floating box 104 is detachably connected with an upper cover 101. A handle 102 is fixedly connected to the upper cover 101. A floating ring 103 is fixedly connected to the outer side surface of the floating box 104. An ultrasonic sensor 105, a single-chip microcomputer, and a BLE ultrasonic module are arranged inside the floating box 104. A support cylinder 106 is fixedly connected to the center of the lower part of the floating box 104. A sampling rope 107 passes through the floating box 104. The lower end of the sampling rope 107 is fixedly connected with a fixed seat 406. Reference Figure 4 , Figure 1 , When floating, the floating ring 103 and the floating box 104 provide the buoyancy required for floating, ensuring the stability of the overall floating of the floating box 104. When measuring the sampling position, the ultrasonic sensor 105 transmits the position signal of the main sampling component 4 to the single-chip microcomputer. After calculation by the single-chip microcomputer, the position of the main sampling component 4 is obtained, and then it is transmitted to the mobile phone APP through the BLE ultrasonic module, realizing the function of remotely displaying the measured distance value and ensuring the accuracy of the sampling depth. For example, when sampling surface water, the measured distance value is 0.3 - 0.5 meters. The support cylinder 106 is used to cooperate with the position of the fixed seat 406, ensuring that the main sampling component 4 driven by the sampling rope 107 can drive the entire floating component 1 to move synchronously, realizing the sampling function.

[0022] The main sampling component 4 is arranged directly below the floating component 1 and is used for sampling water quality. The main sampling component 4 includes a main housing 401. A fixed seat 406 is fixedly connected to the center of the upper part of the main housing 401. A guiding cylinder 409 is fixedly connected to the center inside the main housing 401. A circular electromagnet 407 is fixedly installed on the top wall of the guiding cylinder 409. A drawing spring 408 is fixedly connected inside the guiding cylinder 409. A sampling cylinder 402 is arranged inside the main housing 401. A sampling head 4021 is fixedly connected to the upper part of the sampling cylinder 402. The sampling head 4021 penetrates the upper side wall of the main housing 401. A filter element is arranged on the top of the main housing 401. A microcontroller, a relay, a rechargeable battery, and a wireless module are arranged inside the main housing 401. Reference Figure 7 , When sampling, the entire main housing 401 will sink into the water under the action of its own gravity, providing space and position for water intake. The circular electromagnet 407 can generate magnetic force when energized, providing a limiting force to keep the drawing spring 408 in a compressed state. When the extraction function is required, the mobile phone APP sends a trigger signal to the microcontroller through the wireless module. The microcontroller controls the circular electromagnet 407 through the relay, making the energized circular electromagnet 407 de-energized, so that the magnetic force of the circular electromagnet 407 disappears. The compressed drawing spring 408 lacks restraint, thus providing the required force for extraction and realizing the function of remotely controlling the extraction of water samples.

[0023] A counterweight plate 410 is provided inside the main housing 401 for supporting the sampling tube 402. The filter element includes a protective plate 403 fixedly mounted on the top of the main housing 401. A blocking ring 404 is fixedly connected to the protective plate 403. The inner side of the blocking ring 404 is provided with a filter hole 405. An elastic ring 4031 is provided at the edge of the protective plate 403. refer to Figure 7 The counterweight plate 410 can increase the overall weight of the main shell 401, making it easier to sink into the water; the elastic ring 4031 of the protective plate 403 can provide a buffer for the reset of the toggle claw 301, preventing the toggle claw 301 from being deformed due to impact, and ensuring that the toggle claw 301 has a reusable function; the filter hole 405 is used for drawing in and out water samples, which is convenient for sampling and discharging water samples.

[0024] Extraction assembly 5, which is provided at the lower portion of the main housing 401 and is used to generate extraction force; The extraction assembly 5 includes an operating frame 501, a piston member is fixedly provided on the upper portion of the operating frame 501, an intermediate column 506 is fixedly connected to the center of the operating frame 501, and a permanent magnet 507 is provided on the upper portion of the intermediate column 506. The permanent magnet 507 and the circular electromagnet 407 have opposite magnetic properties. refer to Figure 8 The middle column 506 is used to pass through the counterweight plate 410, so that the permanent magnet 507 can be adsorbed and fixed to the circular electromagnet 407 in the energized state. Under the action of external force, the middle column 506 will compress the extraction spring 408, and the extraction spring 408 is in a compressed state.

[0025] The piston member includes a piston rod 502 fixedly mounted on the upper portion of the operating frame 501. The piston rod 502 is inserted into the sampling cylinder 402 and the upper end of the piston rod 502 is fixedly connected to a piston head 503. The upper portion of the piston head 503 is fixedly connected to a sealing block 504. The sealing block 504 is fixedly connected to a blocking needle 505. The blocking needle 505 can pass through the filter hole 405. refer to Figure 8 During the extraction operation, the permanent magnet 507 is powered off to release the extraction spring 408. The elastic force of the extraction spring 408 returning to its original state drives the middle column 506, the operating frame 501, and the piston rod 502 to move, thereby driving the piston head 503 to move. The piston head 503 draws the external water flow from the filter hole 405 into the sampling cylinder 402 to complete the sampling operation of the water body; when the piston head 503 is in the discharge state, the sealing block 504 blocks the inner cavity of the sampling head 4021, and the blocking needle 505 can block the filter hole 405 to ensure that water at a non-sampling depth does not enter the sampling cylinder 402; the number of blocking needles 505 is the same as the number of filter holes 405, the number can be more or less, and the aperture can also be selected by yourself.

[0026] The shifting assembly 3 is arranged on the outside of the operating frame 501 and is used for shifting and cutting weeds; the shifting assembly 3 includes a support frame 305 fixedly mounted on the bottom of the main housing 401, the lower part of the support frame 305 is rotatably connected to the shifting claw 301, the upper part of the shifting claw 301 is fixedly connected to the elastic band 302, the inner end of the elastic band 302 is fixedly connected to the top of the main housing 401, the upper part of the shifting claw 301 is provided with an arc-shaped portion 303, the outer side surface of the arc-shaped portion 303 is fixedly connected to the cutting portion 304, the inner side of the support frame 305 is provided with a lifting frame 306, the lifting frame 306 is fixedly connected to the operating frame 501, and the end of the lifting frame 306 close to the shifting claw 301 is rotatably connected to the lifting wheel 307, and the lifting wheel 307 is in rolling contact with the shifting claw 301; refer to Figure 6 、 Figure 3 As the extraction action proceeds, the operating frame 501 will drive the lifting frame 306 and the lifting wheel 307 to move downward, and the lifting wheel 307 will push the toggle claw 301 to open outward, and the toggle claw 301 will drive the elastic band 302 to move synchronously. The elastic band 302 is stretched. In the process of opening the toggle claw 301, the waterweed impurities can be pushed from the middle to the outside, and the cutting part 304 will come into contact with the long waterweed to cut off the long waterweed, and at the same time drive the sampling bag 201 to move synchronously. Since the sampling bag 201 is meshed, It has the function of fishing weeds and impurities from the center to the surrounding areas, thereby preventing weeds and impurities from approaching the filter hole 405, preventing aquatic plants from blocking the water from entering the sampling tube 402, and ensuring the stability of the sampled water quality; in addition, the extent to which the claw 301 is opened outward can reflect whether the piston head 503 has fully moved down to extract, so that it can be judged whether the sampling tube 402 is full of samples. When sampling surface water, it can be clearly observed, thereby avoiding moving the sampling tube 402 before the sampling is completed, thereby improving the accuracy of sampling.

[0027] The crushing assembly 6 is provided at the bottom of the support frame 305 and is used to crush weeds. The crushing assembly 6 includes a fixing ring 601 fixedly mounted on the bottom of the support frame 305. The lower portion of the fixing ring 601 is threadedly connected to a crushing head 602. The crushing head 602 is provided with an operating notch 603. The outer surface of the crushing head 602 is provided with a crushing blade. refer to Figure 9 The crushing head 602 is conical in shape, which can provide the weight of sinking for the whole body, and can also prevent aquatic plants from entering the inner side of the fixing ring 601. The crushing head 602 can be driven to rotate by operating the notch 603, so as to facilitate the installation or removal of the crushing head 602, and the operation is simple; the crushing blade on the outer surface of the crushing head 602 can be a single straight blade, a double straight blade or a spiral blade, which can be selected according to needs.

[0028] The auxiliary sampling assembly 2 is disposed between the paw 301 and the main housing 401 and is used for sampling weeds. The auxiliary sampling assembly 2 includes a sampling bag 201, with connecting ropes 202 fixedly connected to both sides of the sampling bag 201. The upper opening of the sampling bag 201 is provided with an arcuate edge 203. The sampling bag 201 is evenly provided with a hole structure for water flow, such as a sack or mesh bag. refer to Figure 1 、 Figure 5 As the toggle claw 301 opens, the opening of the closed sampling bag 201 will be opened, and the sampling bag 201 will salvage the aquatic plants in the water body. For example, the aquatic plants cut by the cutting part 304 will be salvaged, so that the relevant aquatic plants can be sampled, which is convenient for detecting aquatic plant impurities, increases the samples for water sample detection, and ensures the accuracy of detection; the arcuate edge 203 has a curvature. In the retracted state, the arcuate edge 203 is located above the blocking ring 404, which increases the area for pushing aquatic plant impurities, and can guide the water flow in the sampling bag 201 to be discharged, preventing aquatic plants from entering the upper sampling space.

[0029] Working principle: When using, choose whether to install the crushing component 6 and the auxiliary sampling component 2 according to the water environment of the sampling. In the water environment with more aquatic plants, you can choose to install the crushing component 6 and the auxiliary sampling component 2; Applying upward pressure to the operating frame 501 causes the permanent magnet 507 to contact the circular electromagnet 407 , and the sealing block 504 blocks the inner cavity of the sampling head 4021 . The blocking needle 505 blocks the filter hole 405 , ensuring that water outside the sampling depth does not enter the sampling cylinder 402 . Place the floating component 1 and the main sampling component 4 into the water body to be sampled, and release the sampling rope 107. As the sampling rope 107 is released, the ultrasonic sensor 105 transmits the position signal of the main sampling component 4 to the single-chip microcomputer. The single-chip microcomputer calculates the position of the main sampling component 4 and then transmits it to the mobile phone app through the BLE ultrasonic module to realize remote display of the measured distance value. For example, if it is necessary to sample the surface water, the sampling rope 107 can be stopped when the displayed value is 0.3-0.5 meters. The mobile phone APP sends a trigger signal to the microcontroller through the wireless module. The microcontroller controls the circular electromagnet 407 through the relay, de-energizing the circular electromagnet 407, thereby eliminating the magnetic force of the circular electromagnet 407. The extraction spring 408 in the compressed state is no longer restricted, driving the intermediate column 506, the operating frame 501, and the piston rod 502 to move downward, thereby driving the piston head 503 to move. The piston head 503 draws the external water flow through the filter hole 405 into the sampling tube 402, completing the water sampling operation. As the extraction action proceeds, the operating frame 501 drives the lifting frame 306 and the lifting wheel 307 to move downward, and the lifting wheel 307 pushes the toggle claw 301 to open outward. The toggle claw 301 drives the elastic band 302 to move synchronously, and the elastic band 302 is stretched. During the opening process of the toggle claw 301, the waterweed impurities can be pushed from the middle to the outside, and the cutting portion 304 will come into contact with the long waterweed to cut off the long waterweed, thereby preventing the waterweed from obstructing the water from entering the sampling tube 402. Then, the sampling of the water body can be completed by retracting the sampling rope 107.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A water conservancy project inspection sampling device, characterized in that, include: A floating component (1), the floating component (1) is used to float on the water surface to measure the sampling depth; A main sampling component (4), the main sampling component (4) is arranged directly below the floating component (1) and is used to sample water quality; The main sampling assembly (4) includes a main housing (401), a fixing seat (406) is fixedly connected at the center of the upper portion of the main housing (401), a guide cylinder (409) is fixedly connected at the center of the interior of the main housing (401), a circular electromagnet (407) is fixedly installed on the top wall of the guide cylinder (409), an extraction spring (408) is fixedly connected inside the guide cylinder (409), a sampling cylinder (402) is provided inside the main housing (401), a sampling head (4021) is fixedly connected to the upper portion of the sampling cylinder (402), the sampling head (4021) passes through the upper side wall of the main housing (401), a filter is provided on the top of the main housing (401), and a microcontroller, a relay, a rechargeable battery, and a wireless module are provided inside the main housing (401); An extraction component (5), the extraction component (5) being arranged at the lower portion of the main housing (401) and being used to generate an extraction force; The extraction assembly (5) includes an operating frame (501), a piston member is fixedly provided on the upper portion of the operating frame (501), an intermediate column (506) is fixedly connected to the center of the operating frame (501), a permanent magnet (507) is provided on the upper portion of the intermediate column (506), and the magnetic properties of the permanent magnet (507) and the circular electromagnet (407) are opposite; A weeding assembly (3), the weeding assembly (3) being arranged on the outside of the operating frame (501) and used for weeding and cutting; A crushing assembly (6), the crushing assembly (6) being arranged at the bottom of the support frame (305) and being used for crushing weeds; A secondary sampling component (2) is provided between the driving claw (301) and the main housing (401) and is used for sampling weeds.

2. The water conservancy project detection sampling device according to claim 1, characterized in that: The floating assembly (1) comprises a floating box (104), the upper portion of the floating box (104) is detachably connected to an upper cover (101), the upper cover (101) is fixedly connected to a handle (102), the outer side of the floating box (104) is fixedly connected to a floating ring (103), an ultrasonic sensor (105), a single-chip microcomputer, and a BLE ultrasonic module are provided in the floating box (104), a support tube (106) is fixedly connected at the center of the lower portion of the floating box (104), a sampling rope (107) is passed through the floating box (104), and the lower end of the sampling rope (107) is fixedly connected to a fixing seat (406).

3. The water conservancy project detection sampling device according to claim 1, wherein: A counterweight plate (410) for supporting the sampling tube (402) is provided inside the main housing (401), and the filter element includes a protective plate (403) fixedly mounted on the top of the main housing (401), a blocking ring (404) is fixedly connected to the protective plate (403), a filtering hole (405) is provided on the inner side of the blocking ring (404), and an elastic ring (4031) is provided at the edge of the protective plate (403).

4. The water conservancy project detection sampling device according to claim 3, characterized in that: The piston member comprises a piston rod (502) fixedly mounted on the upper portion of the operating frame (501); the piston rod (502) is inserted into the sampling cylinder (402) and the upper end of the piston rod (502) is fixedly connected to a piston head (503); the upper portion of the piston head (503) is fixedly connected to a sealing block (504); the sealing block (504) is fixedly connected to a blocking needle (505); and the blocking needle (505) can pass through the filter hole (405).

5. A water conservancy project inspection sampling device according to claim 1, characterized in that: The crushing assembly (6) comprises a fixing ring (601) fixedly mounted on the bottom of the support frame (305); a crushing head (602) is threadedly connected to the lower portion of the fixing ring (601); an operating notch (603) is provided on the crushing head (602); and a crushing blade is provided on the outer surface of the crushing head (602).

6. The water conservancy project detection sampling device according to claim 1, characterized in that: The shifting assembly (3) comprises a support frame (305) fixedly mounted on the bottom of the main housing (401); the lower portion of the support frame (305) is rotatably connected to a shifting claw (301); the upper portion of the shifting claw (301) is fixedly connected to an elastic band (302); the inner end of the elastic band (302) is fixedly connected to the top of the main housing (401); the upper portion of the shifting claw (301) is provided with an arcuate portion (303); the outer side surface of the arcuate portion (303) is fixedly connected to a cutting portion (304); a lifting frame (306) is provided on the inner side of the support frame (305); the lifting frame (306) is fixedly connected to the operating frame (501); the lifting frame (306) is rotatably connected to an elevating wheel (307) at one end of the lifting frame (306) close to the shifting claw (301); the elevating wheel (307) is in rolling contact with the shifting claw (301).

7. The water conservancy project detection sampling device according to claim 1, characterized in that: The auxiliary sampling assembly (2) comprises a sampling bag (201), two sides of the sampling bag (201) are fixedly connected with connecting ropes (202), and an arc-shaped edge (203) is provided at the upper opening of the sampling bag (201).

8. The water conservancy project detection sampling device according to claim 7, characterized in that: The sampling bag (201) is evenly provided with hole structures for water to flow through.

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