A sample filtering and collecting device for water environment monitoring

Abstract

The present invention discloses a sample filtering and collecting device for water environment monitoring, which relates to the technical field of water sample collection, and comprises a cover body, a hook is fixedly installed on the top of the cover body, and a partition frame is fixedly connected to the inner wall of the cover body. The present water body collecting device is a sample filtering and collecting device for water environment monitoring. The water body collecting device accurately controls the collecting depth through the cooperation of a trigger block and a pressure plate. When the predetermined depth is reached, the trumpet-shaped split cylinder is driven by water pressure to quickly merge and lock to prevent water mixing. At the same time, its open state increases the contact area and improves the representativeness of the sample. In addition, the device can continuously collect water bodies of different depths by adjusting the position of the adjusting screw during the sinking process, thereby improving the collecting efficiency. When the split cylinders merge, the lever and the spiral groove cooperate to stir the water body and discharge metal residues and other debris, thereby avoiding merging obstruction and poor sealing, and ensuring that the collected amount meets the standard, further ensuring the collecting efficiency of the device.

Description

Technical Field

[0001] The invention relates to the technical field of water sample collection, in particular to a sample filtering and collecting device for water environment monitoring. Background Art

[0002] Water environment monitoring is to determine the water quality and its changing trend by measuring the representative indicators that may affect the water environment quality through appropriate methods. The objects of water environment monitoring can be divided into water quality monitoring of polluted water bodies and pollution source monitoring: the former includes surface water (rivers, lakes, reservoirs, seawater) and groundwater; the latter includes domestic sewage, hospital sewage and various industrial wastewaters, and sometimes also includes agricultural runoff, primary rainwater and acid mine drainage. Water environment monitoring is to monitor various harmful substances and factors that affect water bodies based on these unpolluted and polluted water bodies. For example, a large amount of wastewater will be generated during industrial production. At this time, portable samplers can be used to collect water samples of industrial wastewater and detect the content of harmful substances in them to ensure that wastewater discharge meets environmental protection standards.

[0003] Currently, when sampling, people manually put the sampler into the wastewater. After the sampling is completed, the water sample in the sampler is usually sealed by the cover being pushed closed by the water flow during the process of lifting the sampler, thereby controlling the inflow and outflow of water. Although this sampler is portable and easy to use, this closing method makes it easy for the water sample to come into contact with water bodies at different depths, resulting in inaccurate sampling results and possible mixing of samples. In addition, this sampling method can only collect water samples from one depth at a time, and multiple repeated collections are required, and the operation is relatively cumbersome. Summary of the invention

[0004] The object of the present invention is to provide a sample filtering and collecting device for water environment monitoring to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a sample filtering and collecting device for water environment monitoring, comprising a cover body, a hook is fixedly installed on the top of the cover body, and a partition frame is fixedly connected to the inner wall of the cover body;

[0006] The bottom of the cover is provided with a continuous collection mechanism at equal distances, so that during the water sample collection process, the collected water samples can be sealed and stored by water pressure, effectively preventing mixing with water at other depths during the retrieval process;

[0007] Auxiliary mechanisms are arranged at equal distances on the top of the cover body so as to stir the water in the collection space during the water sample collection process and discharge possible metal residues and other debris.

[0008] Preferably, the continuous collection mechanism includes a support block, and the top of the support block is fixedly connected to the bottom of the cover body, a separation groove is opened on one side wall of the three support blocks that are close to each other, and the inner wall of the separation groove is slidably connected to a first sliding column, the outer wall of the first sliding column is symmetrically rotationally connected to a connecting block, and the inside of the connecting block is rotatably connected to a second sliding column, the outer wall of the second sliding column is slidably fitted with the inner wall of the separation groove, the side wall of the two connecting blocks that are close to each other is slidably fitted with the outer walls of both sides of the support block, the outer walls of both ends of the first sliding column are hinged with a first connecting rod, and the other end of the first connecting rod is hinged with a split cylinder, the outer walls of both ends of the second sliding column are hinged with a second connecting rod, and the other end of the second connecting rod is hinged to the outer wall of the split cylinder.

[0009] Preferably, an inclined groove is provided on the inner wall of the separation groove corresponding to the second sliding column, a side wall of the three support blocks close to each other is fixedly connected with spring one, and the other end of spring one is fixedly connected to the outer wall of the split cylinder, the outer wall of the partition frame is equidistantly fitted and slidably connected with a pressure plate, and the inner wall of the cover body is equidistantly fixedly connected with a support shell corresponding to the pressure plate, an adjustment plate is fitted on the inner wall of the support shell, and a side wall of the adjustment plate is fixedly connected with spring two, and the other end of spring two is fixedly connected with a trigger block, and through holes are provided on the top of the cover body at equal distances corresponding to the pressure plate.

[0010] Preferably, a groove is provided at the top of the pressure plate corresponding to the support shell, and the inner wall of the groove slides in contact with the outer wall of the support shell, a side wall of the trigger block is inclined corresponding to the groove, a sliding rod is rotatably connected to the inside of the pressure plate, the bottom of the cover body is fixedly connected to a support tube at an equal distance, and the bottom of the support tube is fixedly connected to a support plate, and the outer wall of the bottom end of the sliding rod passes through the inside of the support plate and is fixedly connected to the pressure plate.

[0011] Preferably, the bottom of the support plate is provided with sliding grooves at equal distances, and the inner wall of the sliding groove is slidably connected with a top block, the bottom of the top block is fixedly connected with a connecting plate corresponding to the pressure plate, and the top of the pressure plate is truncated cone-shaped, and the end portions of the three top blocks that are far away from each other are pressed against the inner wall of the split cylinder.

[0012] Preferably, the inner wall of the slide groove is symmetrically provided with limiting grooves, the outer walls on both sides of the top block are fixedly connected to the limiting blocks corresponding to the limiting grooves, and the outer wall of the limiting block is fitted and slid with the inner wall of the limiting groove.

[0013] Preferably, an adjusting screw is equidistantly threadedly connected inside the cover body, and one end of the adjusting screw is rotatably connected to an outer wall of one side of the adjusting plate, and the other end of the adjusting screw is fixedly connected to a rotary handle.

[0014] Preferably, the auxiliary mechanism includes a mounting tube, and the bottom of the mounting tube is fixedly connected to the top of the cover body at an equal distance corresponding to the sliding rod, the top outer wall of the sliding rod passes through the interior of the cover body and is fixedly connected with a lever, the outer wall of the mounting tube is provided with a spiral groove corresponding to the lever, and the outer wall of the lever slides in contact with the inner wall of the spiral groove.

[0015] Preferably, stirring plates are fixedly connected to the bottom outer wall of the sliding rod at equal distances.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When collecting water, the device can accurately control the collection depth through the clever cooperation of the trigger block and the pressure plate. When the predetermined collection depth is reached, the water pressure at the current depth is used to drive the three originally trumpet-shaped split cylinders to quickly merge and lock, effectively preventing mixing with water at other depths during the retrieval process. In addition, during the collection process, the trumpet-shaped open state can significantly increase the contact area between the split cylinder and the surrounding water, thereby increasing the chance of collecting samples from different water areas and making the collected water samples more representative. At the same time, by pre-adjusting the positions of the three adjusting screws, the device can continuously collect water samples at different depths during the sinking process, which is beneficial to improving the collection efficiency of the device.

[0018] 2. When collecting water, the lever and the spiral groove can be used to stir the water in the collection space before the merging is completed by merging the split cylinders, so that possible metal residues and other debris can be discharged. On the one hand, the debris can be prevented from affecting the merging and making it impossible to completely seal the split cylinders. On the other hand, the debris can be prevented from occupying the collection space, resulting in the failure to meet the sample collection standards. This is beneficial to ensuring the collection efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall bottom-up structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure inside the cover body of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the first part of the continuous collection mechanism of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the second part of the continuous collection mechanism of the present invention;

[0024] Figure 6It is a structural schematic diagram of the third part of the continuous collection mechanism of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the auxiliary mechanism of the present invention;

[0026] In the figure: 1, cover; 2, hook; 3, partition frame; 6, through hole; 4, continuous collection mechanism; 401, support block; 402, separation slot; 403, first slide column; 404, second slide column; 405, connection block; 406, first connecting rod; 407, split cylinder; 408, second connecting rod; 409, inclined slot; 410, spring 1; 411, pressure plate; 412, support shell; 413, adjustment plate; 414. Spring 2; 415. Trigger block; 416. Groove; 417. Slide rod; 418. Support plate; 419. Support cylinder; 420. Slide groove; 421. Top block; 422. Connecting plate; 423. Pressure plate; 424. Limiting groove; 425. Limiting block; 426. Adjusting screw; 427. Rotary handle; 5. Auxiliary mechanism; 501. Mounting cylinder; 502. Push rod; 503. Spiral groove; 504. Agitating plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] For example, see Figure 1-7 The present invention provides a sample filtering and collecting device for water environment monitoring, comprising a cover body 1, a hook 2 is fixedly installed on the top of the cover body 1, a partition frame 3 is fixedly connected to the inner wall of the cover body 1, and a continuous collecting mechanism 4 is equidistantly arranged on the bottom of the cover body 1.

[0029] Furthermore, the continuous collection mechanism 4 includes a support block 401, and the top of the support block 401 is fixedly connected to the bottom of the cover body 1, a separation groove 402 is opened on one side wall of the three support blocks 401, and the inner wall of the separation groove 402 is slidably connected to the first sliding column 403, the outer wall of the first sliding column 403 is symmetrically rotatably connected to the connecting block 405, and the inside of the connecting block 405 is rotatably connected to the second sliding column 404, the outer wall of the second sliding column 404 is slidably fitted with the inner wall of the separation groove 402, and the side wall of the two connecting blocks 405 is slidably fitted with the outer walls of both sides of the support block 401, the outer walls of the two ends of the first sliding column 403 are hinged with a first connecting rod 406, and the other end of the first connecting rod 406 is hinged with a split cylinder 407, the outer walls of the two ends of the second sliding column 404 are hinged with a second connecting rod 408, and the other end of the second connecting rod 408 is hinged to the outer wall of the split cylinder 407;

[0030] In this embodiment, when the device is used, first, a hook 2 is fixedly installed on the top of the cover body 1, so that the pull rope can be connected to the hook 2, and then it is put into the wastewater area and the descending depth is controlled. Then, during the descending process, through holes 6 are opened at equal distances through the top of the cover body 1 corresponding to the pressure plate 411, so that during the gradual sinking process, water can flow into the cover body 1 through the through holes 6 and squeeze the pressure plate 411, and as the sinking depth changes, the squeezing force of the pressure plate 411 will change, and then an adjusting screw 426 is threadedly connected at equal distances inside the cover body 1, and one end of the adjusting screw 426 is connected to the adjusting screw 426. The outer wall of one side of the plate 413 is rotatably connected, and the other end of the adjusting screw 426 is fixedly connected to a handle 427, and at the same time, a spring 2 414 is fixedly connected to one side wall of the adjusting plate 413, and the other end of the spring 2 414 is fixedly connected to a trigger block 415, and a side wall of the trigger block 415 is inclined corresponding to the groove 416, so that in a normal state, the three pressing plates 411 are restricted from sliding by the trigger block 415 driven by the spring 2 414, and the front and rear positions of the adjusting plate 413 can be controlled by rotating the handle 427, so that the limiting force of the trigger block 415 driven by the spring 2 414 on the pressing plate 411 can be controlled;

[0031] When a required depth is reached, the squeezing force of the water pressure at this depth on the pressure plate 411 will be greater than the limiting force of the spring 2 414 on the trigger block 415, so that the pressure plate 411 will slide downward and compress the trigger block 415 into the support shell 412. At this time, the slide bar 417 is connected through the internal rotation of the pressure plate 411, and the bottom of the cover body 1 is fixedly connected with a support cylinder 419 at an equal distance, and the bottom of the support cylinder 419 is fixedly connected with a support plate 418, and at the same time, the outer wall of the bottom end of the slide bar 417 passes through the interior of the support plate 418 and is fixedly connected with a pressure plate 423, so that the slide bar 417 can slide downward through the pressure plate 411, so that the pressure plate 423 moves downward;

[0032] Then, under normal circumstances, the bottom of the support plate 418 is provided with equidistant sliding grooves 420, and the inner wall of the sliding groove 420 is fitted and slidably connected with a top block 421, and the bottom of the top block 421 is fixedly connected with a connecting plate 422 corresponding to the pressure plate 423, and the top of the pressure plate 423 is truncated, and the ends of the three top blocks 421 that are away from each other are fitted and squeezed with the inner wall of the split cylinder 407, so that the three connecting plates 422 can be squeezed and guided by the pressure plate 423, so that the three top blocks 421 are away from each other and squeeze and resist the inner walls of the three split cylinders 407;

[0033] Then, a separation groove 402 is opened on one side wall close to the three support blocks 401, and the inner wall of the separation groove 402 is slidably connected to the first sliding column 403, and the outer wall of the first sliding column 403 is symmetrically rotated and connected to the connecting block 405, and the inner part of the connecting block 405 is rotatably connected to the second sliding column 404, and the outer wall of the second sliding column 404 is slidably fitted with the inner wall of the separation groove 402, and the side wall close to the two connecting blocks 405 is slidably fitted with the outer walls of both sides of the support block 401, and the outer walls of the two ends of the first sliding column 403 are hinged with the first connecting rod 406, and the other end of the first connecting rod 406 is hinged with the split cylinder 407, and the outer walls of the two ends of the second sliding column 404 are hinged with the second connecting rod 408, and the second connecting rod The other end of 408 is hinged to the outer wall of the split cylinder 407, so that the first slide post 403 and the second slide post 404 can move synchronously under the control of the connecting block 405. When the three top blocks 421 move away from each other and squeeze and resist the inner walls of the three split cylinders 407, the three split cylinders 407 will move away from each other and drive the first slide post 403 and the second slide post 404 to move in the separation groove 402. When the separation is translated for a certain distance, an inclined groove 409 is opened on the inner wall of the separation groove 402 corresponding to the second slide post 404, so that the second slide post 404 will slide into the inclined groove 409, so that the three split cylinders 407 are tilted and opened into a trumpet shape after being translated for a certain distance. At this time, the device is in a normal state;

[0034] When the pressure plate 423 moves downward and no longer compresses and guides the three connecting plates 422, a spring 410 is fixedly connected to a side wall of the three support blocks 401, and the other end of the spring 410 is fixedly connected to the outer wall of the split cylinder 407, so that the three split cylinders 407 can be driven to approach each other and merge by the elastic force of the spring 410. At the same time, when the trumpet-shaped opening state is merged, compared with the sampling port of a conventional collector, the present device can significantly increase the contact area between the split cylinder 407 and the surrounding water body during collection, thereby increasing the chance of collecting samples from different water areas at the same depth;

[0035] Then, when the merging is completed, the retracted trigger block 415 driven by the second spring 414 returns to its original position, fixing the position of the pressing plate 411 after it is lowered, thereby completing the merging and locking, and preventing the water from mixing with other depths during the taking-out process;

[0036] As described above, when collecting water, the device can accurately control the collection depth through the clever cooperation of the trigger block 415 and the pressure plate 411. When the predetermined collection depth is reached, the water pressure at the current depth is used to drive the three originally trumpet-shaped split cylinders 407 to quickly merge and lock, effectively preventing mixing with water at other depths during the retrieval process. In addition, during the collection process, the trumpet-shaped open state can significantly increase the contact area between the split cylinder 407 and the surrounding water, thereby increasing the chance of collecting samples from different water areas and making the collected water samples more representative. At the same time, by pre-adjusting the positions of the three adjusting screws 426, the device can continuously collect water samples at different depths during the sinking process, which is beneficial to improving the collection efficiency of the device.

[0037] Embodiment 2: Based on the above embodiment, auxiliary mechanisms 5 are arranged at equal distances on the top of the cover body 1 .

[0038] Furthermore, the auxiliary mechanism 5 includes a mounting tube 501, and the bottom of the mounting tube 501 is fixedly connected to the top of the cover body 1 at an equal distance corresponding to the slide rod 417, the top outer wall of the slide rod 417 passes through the interior of the cover body 1 and is fixedly connected to a lever 502, the outer wall of the mounting tube 501 is provided with a spiral groove 503 corresponding to the lever 502, and the outer wall of the lever 502 slides in contact with the inner wall of the spiral groove 503.

[0039] In this embodiment, during the descent of the slide bar 417, a lever 502 is fixedly connected through the top outer wall of the slide bar 417 through the interior of the cover body 1, and a spiral groove 503 is provided on the outer wall of the mounting cylinder 501 corresponding to the lever 502, and the outer wall of the lever 502 slides in contact with the inner wall of the spiral groove 503, and at the same time, a stirring plate 504 is fixedly connected to the bottom outer wall of the slide bar 417 at an equal distance, so that during the descent of the slide bar 417, the slide bar 417 can rotate during the descent by utilizing the cooperation between the lever 502 and the spiral groove 503, thereby driving a plurality of stirring plates 504 to stir the water in the collection space and discharge possible metal residues and other debris, on the one hand, avoiding the debris from affecting the merging, making the split cylinder 407 unable to be completely sealed, and on the other hand, avoiding the debris from occupying the collection space, resulting in the failure to meet the sample collection quantity.

[0040] As described above, when collecting water, the lever 502 and the spiral groove 503 can be used in conjunction with each other during the process of merging the split cylinder 407, so that the water in the collection space can be stirred before the merging is completely completed, and possible metal residues and other debris can be discharged. On the one hand, this can prevent the debris from affecting the merging and making it impossible to completely seal the split cylinder 407. On the other hand, this can prevent the debris from occupying the collection space and causing the sample quantity to fail to meet the standard. This is beneficial to ensuring the collection efficiency of the device.

[0041] Working principle: firstly, the pull rope is connected with the hook 2, and then it is put into the wastewater area and the descending depth is controlled. Then, during the descending process, the three connecting plates 422 are squeezed and guided by the pressure plate 423, so that the three top blocks 421 are separated from each other and squeezed against the inner walls of the three split cylinders 407. At this time, the three split cylinders 407 will separate from each other and drive the first slide column 403 and the second slide column 404 to move in the separation groove 402. When the separation is translated for a certain distance, an inclined groove 409 is opened on the inner wall of the separation groove 402 corresponding to the second slide column 404, so that the second slide column 404 will slide into the inclined groove 409, so that the three split cylinders 407 are tilted and opened into a trumpet shape after being translated for a certain distance. At this time, the device is in a normal state;

[0042] When a required depth is reached, the squeezing force of the water pressure at this depth on the pressure plate 411 will be greater than the limiting force of the spring 2 414 on the trigger block 415, so that the pressure plate 411 will slide downward and compress the trigger block 415 into the support shell 412. At this time, the slide bar 417 is connected through the internal rotation of the pressure plate 411, and the bottom of the cover body 1 is fixedly connected with a support cylinder 419 at an equal distance, and the bottom of the support cylinder 419 is fixedly connected with a support plate 418, and at the same time, the outer wall of the bottom end of the slide bar 417 passes through the interior of the support plate 418 and is fixedly connected with a pressure plate 423, so that the slide bar 417 can slide downward through the pressure plate 411, so that the pressure plate 423 moves downward;

[0043] In a normal state, the three pressing plates 411 are restricted from sliding by the trigger block 415 driven by the second spring 414, and the front and rear positions of the adjusting plate 413 can be controlled by rotating the rotary handle 427, so that the limiting force of the trigger block 415 driven by the second spring 414 on the pressing plates 411 can be controlled, so that in the gradual sinking process, the water can flow into the cover body 1 through the through hole 6 and squeeze the pressing plates 411, and the squeezing force of the pressing plates 411 will change with the change of the sinking depth;

[0044] When the pressure plate 423 moves downward and no longer compresses and guides the three connecting plates 422, the elastic force of the spring 1 410 drives the three split cylinders 407 to approach each other and merge. At the same time, when the trumpet-shaped opening state is merged, compared with the sampling port of a conventional collector, the present device can significantly increase the contact area between the split cylinder 407 and the surrounding water during collection, thereby increasing the chance of collecting samples from different water areas at the same depth;

[0045] When the merging is completed, the retracted trigger block 415 driven by the second spring 414 returns to its original position, fixing the position of the pressing plate 411 after it is lowered, thereby completing the merging and locking, and preventing the water from mixing with other depths during the taking-out process;

[0046] During the descent of the slide bar 417, the slide bar 417 can rotate by utilizing the cooperation between the lever 502 and the spiral groove 503, thereby driving multiple stirring plates 504 to stir the water in the collection space, thereby discharging possible metal residues and other debris. On the one hand, this prevents the debris from affecting the merging, making it impossible to completely seal the split cylinder 407; on the other hand, it prevents the debris from occupying the collection space, resulting in the collection sample quantity failing to meet the standard.

[0047] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sample filtering and collecting device for water environment monitoring, comprising a cover body (1), characterized in that: The bottom of the cover (1) is provided with continuous collection mechanisms (4) at equal distances, so that during the water sample collection process, the collected water samples are sealed and stored by water pressure to prevent mixing with water at other depths during the retrieval process; Auxiliary mechanisms (5) are arranged at equal distances on the top of the cover body (1) to stir the water in the collection space and discharge the existing metal residues and debris; The continuous collection mechanism (4) comprises a support block (401), wherein the top of the support block (401) is fixedly connected to the bottom of the cover body (1), a separation groove (402) is provided on one side wall of the three support blocks (401) adjacent to each other, and a first sliding column (403) is slidably connected to the inner wall of the separation groove (402); The outer wall of the first sliding column (403) is symmetrically rotatably connected to a connecting block (405), and the interior of the connecting block (405) is rotatably connected to a second sliding column (404); The outer wall of the second sliding column (404) is fitted and slid with the inner wall of the separation groove (402); the side wall of the two connecting blocks (405) close to each other is fitted and slid with the outer walls of both sides of the support block (401); the outer walls of the two ends of the first sliding column (403) are hinged with a first connecting rod (406), and the other end of the first connecting rod (406) is hinged with a split cylinder (407); the outer walls of the two ends of the second sliding column (404) are hinged with a second connecting rod (408), and the other end of the second connecting rod (408) is hinged to the outer wall of the split cylinder (407); a hook (2) is fixedly installed on the top of the cover body (1), and a partition frame (3) is fixedly connected to the inner wall of the cover body (1); the inner wall of the separation groove (402) corresponds to the second sliding column (404); ) is provided with an inclined groove (409), a side wall of the three support blocks (401) close to each other is fixedly connected with a spring one (410), and the other end of the spring one (410) is fixedly connected to the outer wall of the split cylinder (407), the outer wall of the partition frame (3) is equidistantly fitted and slidably connected with a pressure plate (411), and the inner wall of the cover body (1) is equidistantly fixedly connected with a support shell (412) corresponding to the pressure plate (411), the inner wall of the support shell (412) is fitted with an adjustment plate (413), and a side wall of the adjustment plate (413) is fixedly connected with a spring two (414), and the other end of the spring two (414) is fixedly connected with a trigger block (415), and a through hole (6) is provided through the top of the cover body (1) at an equal distance corresponding to the pressure plate (411); The top of the pressure plate (411) is provided with a groove (416) corresponding to the support shell (412), and the inner wall of the groove (416) is fitted and slid with the outer wall of the support shell (412); a side wall of the trigger block (415) is inclined corresponding to the groove (416); a sliding rod (417) is rotatably connected to the inside of the pressure plate (411); a support tube (419) is fixedly connected to the bottom of the cover body (1) at an equal distance; a support disk (418) is fixedly connected to the bottom of the support tube (419); and a pressure disk (423) is fixedly connected to the bottom outer wall of the sliding rod (417) through the inside of the support disk (418).

2. A sample filtering and collecting device for water environment monitoring according to claim 1, characterized in that: The bottom of the support plate (418) is provided with sliding grooves (420) at equal intervals, and the inner wall of the sliding groove (420) is slidably connected to a top block (421), the bottom of the top block (421) is fixedly connected to a corresponding pressure plate (423), and the top of the pressure plate (423) is in a frustum shape, and the ends of the three top blocks (421) that are far away from each other are pressed against the inner wall of the split cylinder (407).

3. A sample filtering and collecting device for water environment monitoring according to claim 2, characterized in that: The inner wall of the slide groove (420) is symmetrically provided with limiting grooves (424), and the outer walls on both sides of the top block (421) correspond to the limiting grooves (424) and are fixedly connected to the limiting blocks (425), and the outer walls of the limiting blocks (425) slide in contact with the inner walls of the limiting grooves (424).

4. A sample filtering and collecting device for water environment monitoring according to claim 3, characterized in that: An adjusting screw (426) is equidistantly threadedly connected inside the cover body (1), one end of the adjusting screw (426) is rotatably connected to an outer wall of one side of the adjusting plate (413), and the other end of the adjusting screw (426) is fixedly connected to a rotary handle (427).

5. A sample filtering and collecting device for water environment monitoring according to claim 4, characterized in that: The auxiliary mechanism (5) comprises a mounting tube (501), and the bottom of the mounting tube (501) is fixedly connected to the top of the cover body (1) at an equal distance corresponding to the sliding rod (417), the top outer wall of the sliding rod (417) passes through the inside of the cover body (1) and is fixedly connected to a lever (502), the outer wall of the mounting tube (501) is provided with a spiral groove (503) corresponding to the lever (502), and the outer wall of the lever (502) and the inner wall of the spiral groove (503) are fitted and slidable.

6. A sample filtering and collecting device for water environment monitoring according to claim 5, characterized in that: The outer wall of the bottom of the sliding rod (417) is fixedly connected with stirring plates (504) at equal distances.

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