A mobile water quality sampling instrument for water quality detection and its use method

Abstract

The present invention discloses a mobile water quality sampler for water quality detection and a method of using the same, which relates to the field of water quality sampling technology, and includes a mounting frame and a sampling bottle. The bottom end of the mounting frame is fixedly connected to a floating plate, and the outer wall of the floating plate is installed with a propeller. The mounting frame and the sampling mechanism are provided. The present invention sets a moving mechanism and a sampling mechanism. After the mounting frame is moved to a specified position, a square block moves one end of a rotating disk, and the second motor drives the square block to be inserted into a square slot; the third motor is started to drive the winding roller to rotate, and the winding roller lowers the support rope to drive the sampling bottle to move downward into the water body. When the sampling bottle moves to a certain depth, the sampling hole automatically opens for sampling operation; after the sampling is completed, after moving to the next location, the square block moves to one end of another rotating disk, and the sampling operation is performed again, which is convenient for sampling water bodies at different locations.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality sampling, in particular to a mobile water quality sampler for water quality detection and a use method thereof. Background Art

[0002] Water quality is the abbreviation of water quality, which indicates the physical, chemical and biological (bacterial, microbial, plankton) characteristics and composition of water. In order to evaluate the quality of water, a series of water quality parameters and water quality standards are stipulated, such as water quality standards for drinking water, industrial water and fishery water. Before testing the water quality, it is necessary to sample the water. After collecting the water samples from the tested water body, they are analyzed and measured to obtain basic data of the water body.

[0003] When sampling water, multiple sampling points should be taken at different locations and depths to ensure more accurate subsequent testing. However, when sampling water, manual sampling operations are required at different locations in sequence, which is complex and easily interferes with the actual stratification of the water. To facilitate sampling of water at different locations, a mobile water quality sampler for water quality testing and a method for its use are provided. Summary of the Invention

[0004] The purpose of the present invention is to provide a mobile water quality sampler for water quality testing and a method for using the same in order to facilitate sampling of water bodies at different locations.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a mobile water quality sampler for water quality testing, comprising a mounting frame and a sampling bottle, the bottom end of the mounting frame is fixedly connected to a floating plate, the outer wall of the floating plate is installed with a propeller, the sampling bottle is displaced by a moving mechanism, and the sampling bottle performs a sampling operation through the sampling mechanism; the moving mechanism includes a movable groove, the movable groove is opened at the top end of the mounting frame, the inner wall of the movable groove is slidably connected to a movable seat, one end of the mounting frame is installed with a first motor, the output end of the first motor is connected to a first threaded rod, the first threaded rod passes through the movable seat, the outer wall of the movable seat is installed with a second motor, the output end of the second motor is connected to a second threaded rod, the outer wall of the second threaded rod is slidably connected to a displacement plate, the displacement plate is slidably connected to the top end of the movable seat, the outer wall of the displacement plate is installed with a third motor, the output end of the third motor is connected to a square block, and the inner wall of the mounting frame is fixedly connected to a limited position frame.

[0006] As a further solution of the present invention, the moving mechanism also includes a mounting plate, the mounting plate being symmetrically fixedly connected to the top of the mounting frame, the outer wall of the mounting plate being rotatably connected to a connecting shaft, the outer wall of the connecting shaft being fixedly connected to a winding roller, the outer wall of the winding roller being installed with a supporting rope, the sampling bottle being located at the bottom of the support rope and located in the inner cavity of the limit frame, one end of the connecting shaft is fixedly connected to a rotating disk, the outer wall of the mounting plate is located at the outer side of the rotating disk and is fixedly connected to a gear ring, one end of the rotating disk is provided with a square groove, the interior of the rotating disk is slidably connected to a clamping block extending from the rotating disk, the clamping block is connected to the rotating disk between the first spring and the rotating disk, the interior of the rotating disk is located at the outer wall of the clamping block and is slidably connected to a spur gear

[0007] As a further solution of the present invention: the sampling mechanism includes a connecting cover, the connecting cover is threadedly connected to the top of the sampling bottle, the bottom end of the support rope is fixedly connected to the connecting cover, the bottom end of the sampling bottle is installed with a counterweight block, the top of the connecting cover is provided with a sampling hole, the top of the connecting cover is provided with a slide groove on both sides of the sampling hole, the inner wall of the slide groove is provided with a fixed groove, the inner wall of the slide groove is slidably connected with a slide rod, the top of the slide rod is fixedly connected with a baffle, the inside of the slide rod is slidably connected to a fixed block extending from the slide rod, the fixed block and the slide rod are connected between the second spring, the baffle and the slide rod are slidably connected with a displacement rack, the displacement rack passes through the fixed block, the top of the displacement rack is fixedly connected with a connecting rope, and one end of the connecting rope is fixedly connected to the top of the limit frame.

[0008] As a further solution of the present invention: the inner wall of the movable groove is in contact with the outer wall of the movable seat, the outer wall of the movable seat is provided with a first threaded hole, and the first threaded hole matches the first threaded rod.

[0009] As a further solution of the present invention: a second threaded hole is opened on the outer wall of the displacement plate, and the second threaded hole matches the second threaded rod.

[0010] As a further solution of the present invention: ratchet teeth are provided on the inner wall of the gear ring, and one end of the clamping block is engaged with the ratchet teeth.

[0011] As a further solution of the present invention: the outer wall of the square block is in contact with the inner wall of the square groove, the extrusion block is located at one end of the inner cavity of the square groove and is provided with a first inclined surface, the outer walls of the extrusion block and the clamping block are provided with tooth grooves, and the tooth grooves are engaged with the spur gears.

[0012] As a further solution of the present invention: the inner wall of the sliding groove is in contact with the outer wall of the sliding rod, and the inner wall of the fixing groove is in contact with the outer wall of one end of the fixing block.

[0013] As a further solution of the present invention: a second inclined surface is provided at the bottom of one end of the fixed block located inside the sliding rod, and a third inclined surface is provided at the bottom of one end of the fixed block extending outside the sliding rod. The lower end of the displacement frame passes through the fixed block and is connected to a cross bar, and the cross bar is in contact with the second inclined surface.

[0014] A method for using a mobile water quality sampler for water quality testing, the specific steps are as follows:

[0015] Step 1: When the mounting bracket moves to the designated position, the first motor is turned on to drive the square block to one end of a rotating disk, and then the second motor is turned on to drive the square block to be inserted into the square slot;

[0016] Step 2: Start the third motor to drive the winding roller to rotate, and the winding roller lowers the support rope to drive the sampling bottle to move downward into the water body;

[0017] Step 3: When the sampling bottle moves to a depth equal to the preset length of the connecting rope, the sampling hole automatically opens for sampling.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By setting up a moving mechanism and a sampling mechanism, after the mounting frame is moved to the specified position, the square block moves to one end of a rotating disk, and the second motor drives the square block to be inserted into the square slot; the third motor is started to drive the winding roller to rotate, and the winding roller lowers the support rope to drive the sampling bottle to move downward into the water body. When the sampling bottle moves to a certain depth, the sampling hole automatically opens for sampling operation; after the sampling is completed, after moving to the next location, the square block moves to one end of another rotating disk, and the sampling operation is performed again, which is convenient for sampling water bodies at different locations, and can realize remote control sampling operation through the controller, and can realize multi-point and multi-depth sampling without disturbing the stratification of the water body to be tested, so that the sampling results are more valuable for reference and the accuracy of the data is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the installation of the movable seat of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation of the winding roller of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the gear ring of the present invention;

[0024] Figure 5 Schematic diagram of the internal structure of the rotating disk of the present invention;

[0025] Figure 6 Schematic diagram of the internal structure of the limit frame of the present invention;

[0026] Figure 7 Schematic diagram of the internal structure of the sampling bottle of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the baffle of the present invention;

[0028] Figure 9 Schematic diagram of the internal structure of the baffle of the present invention;

[0029] Figure 10 Schematic diagram of the structure of the displacement frame of the present invention.

[0030] Figure: 1, mounting frame; 2, floating plate; 3, propeller; 4, sampling bottle; 5, moving mechanism; 501, movable slot; 502, movable seat; 503, first motor; 504, first threaded rod; 505, second motor; 506, second threaded rod; 507, displacement plate; 508, third motor; 509, square block; 510, limit frame; 511, mounting plate; 512, connecting shaft; 513, winding roller; 514, support Rope; 515, gear ring; 516, rotating disk; 517, square groove; 518, clamping block; 519, first spring; 520, spur gear; 521, extrusion block; 6, sampling mechanism; 601, connecting cover; 602, counterweight block; 603, sampling hole; 604, baffle; 605, sliding rod; 606, sliding groove; 607, fixing groove; 608, fixing block; 609, second spring; 610, displacement frame; 611, connecting rope. DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships 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 devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0033] See also Figures 1 to 10 In an embodiment of the present invention, a mobile water quality sampler for water quality testing includes a mounting frame 1 and a sampling bottle 4. The bottom end of the mounting frame 1 is fixedly connected to a floating plate 2, and a propeller 3 is installed on the outer wall of the floating plate 2. The sampling bottle 4 is displaced by a moving mechanism 5, and the sampling bottle 4 performs a sampling operation through a sampling mechanism 6.

[0034] The movable mechanism 5 includes a movable groove 501, which is opened at the top of the mounting frame 1, and the inner wall of the movable groove 501 is slidably connected to the movable seat 502. A first motor 503 is installed at one end of the mounting frame 1, and the output end of the first motor 503 is connected to the first threaded rod 504. The first threaded rod 504 runs through the movable seat 502, and a second motor 505 is installed on the outer wall of the movable seat 502. The output end of the second motor 505 is connected to the second threaded rod 506. The outer wall of the second threaded rod 506 is slidably connected to the displacement plate 507, which is slidably connected to the top of the movable seat 502. The outer wall of the displacement plate 507 is installed with a third motor 508, and the output end of the third motor 508 is connected to a square block 509. The inner wall of the mounting frame 1 is fixedly connected to the limited position frame 510. The movable mechanism 5 also includes a mounting plate 511, which is symmetrically fixedly connected to the top of the mounting frame 1. The outer wall of the plate 511 is rotatably connected to the connecting shaft 512, and the outer wall of the connecting shaft 512 is fixedly connected to the winding roller 513. The outer wall of the winding roller 513 is installed with a support rope 514. The sampling bottle 4 is located at the bottom end of the support rope 514 and in the inner cavity of the limit frame 510. One end of the connecting shaft 512 is fixedly connected to the rotating disk 516. The outer wall of the mounting plate 511 is located on the outer side of the rotating disk 516 and is fixedly connected to the gear ring 515. One end of the rotating disk 516 is provided with a square groove 517. The interior of the rotating disk 516 is slidably connected to a block 518 extending from the rotating disk 516. A first spring 519 is connected between the block 518 and the rotating disk 516. The interior of the rotating disk 516 is located at the outer wall of the block 518 and is rotatably connected to a spur gear 520. The interior of the rotating disk 516 is located at the outer wall of the spur gear 520 and is slidably connected to an extrusion block 521. One end of the extrusion block 521 extends into the inner cavity of the square groove 517.

[0035] In this embodiment: the floating plate 2 floats on the water surface, and the propeller 3 rotates to drive the mounting frame 1 to move. When the mounting frame 1 moves to the specified position, the first motor 503 is started, and the first motor 503 rotates to drive the first threaded rod 504 to rotate. The rotation of the first threaded rod 504 drives the movable seat 502 to slide in the movable groove 501. The displacement of the movable seat 502 drives the square block 509 to move to one end of the rotating disk 516. Then the second motor 505 is started, and the second motor 505 rotates to drive the second threaded rod 506 to rotate. The rotation of the second threaded rod 506 drives the displacement plate 507 to move. The displacement of the displacement plate 507 drives the square block 509 to insert into the square groove 517.

[0036] The square block 509 moves into the square groove 517 and contacts the extrusion block 521, pushing the extrusion block 521 to move. The displacement of the extrusion block 521 drives the spur gear 520 to rotate. The rotation of the spur gear 520 drives the clamping block 518 to move, squeezing the first spring 519. The clamping block 518 moves and separates from the gear ring 515, canceling the fixation of the rotating disk 516. At this time, the third motor 508 can be started. The operation of the third motor 508 drives the square block 509 to rotate. The rotation of the square block 509 drives the rotating disk 516 to rotate. The rotation of the rotating disk 516 drives the connecting shaft 512 to rotate. The rotation of the connecting shaft 512 drives the winding roller 513 to rotate. The winding roller 513 lowers the support rope 514 to drive the sampling bottle 4 to move downward and enter the water body. The sampling operation is performed through the cooperation of parts in the sampling mechanism 6.

[0037] After the sampling is completed, the third motor 508 drives the winding roller 513 to rotate in the opposite direction, and the sampling bottle 4 is pulled up into the inner cavity of the limit frame 510 through the support rope 514. Then the second motor 505 drives the square block 509 to move out of the square groove 517, and the clamping block 518 is engaged with the gear ring 515 under the elastic force of the first spring 519 to fix the rotating disk 516; when it moves to the next location, the first motor 503 drives the square block 509 to move to one end of the other rotating disk 516, and the sampling operation is performed again, which is convenient for sampling water bodies at different locations.

[0038] Please refer to Figures 6 to 10 The sampling mechanism 6 includes a connecting cover 601, which is threadedly connected to the top of the sampling bottle 4. The bottom end of the support rope 514 is fixedly connected to the connecting cover 601. A counterweight 602 is installed at the bottom end of the sampling bottle 4. A sampling hole 603 is opened at the top of the connecting cover 601. A slide groove 606 is opened on both sides of the sampling hole 603 at the top of the connecting cover 601. A fixed groove 607 is opened on the inner wall of the slide groove 606. A slide rod 605 is slidably connected to the inner wall of the slide groove 606. The top of the rod 605 is fixedly connected to the baffle 604, and the internal sliding connection of the sliding rod 605 is a fixed block 608 extending from the sliding rod 605, and a second spring 609 is connected between the fixed block 608 and the sliding rod 605. The internal sliding connection of the baffle 604 and the sliding rod 605 is a displacement frame 610, which passes through the fixed block 608, and the top of the displacement frame 610 is fixedly connected to a connecting rope 611, and one end of the connecting rope 611 is fixedly connected to the top of the limit frame 510.

[0039] In this embodiment, the connecting cover 601 is connected to the top of the sampling bottle 4 by screw threads. At this time, the fixing block 608 is engaged in the fixing groove 607 by the elastic force of the second spring 609, and the baffle 604 blocks the sampling hole 603.

[0040] When the sampling bottle 4 moves into the water body, the counterweight 602 is driven downward by gravity until the connecting rope 611 is tightened. At this time, the counterweight 602 continues to drive the sampling bottle 4 downward, causing the connecting rope 611 to drive the displacement frame 610 to move relative to the connecting cover 601. The displacement frame 610 pushes the fixed block 608 out of the fixed groove 607, canceling the fixation of the baffle 604. The displacement frame 610 then continues to move and pushes the baffle 604 and the connecting cover 601 relative to each other, causing the sampling hole 603 to open, and water enters the sampling bottle 4 through the sampling hole 603 for collection. After completion, the support rope 514 drives the sampling bottle 4 out of the water body, completing the sampling operation. This design facilitates sampling operations after the sampling bottle 4 reaches a certain depth. The sampling depth of the sampling bottle 4 can be controlled by presetting the length of the connecting rope 611.

[0041] Please refer to Figures 1 to 6 The inner wall of the movable groove 501 fits with the outer wall of the movable seat 502 . The outer wall of the movable seat 502 is provided with a first threaded hole, which matches the first threaded rod 504 .

[0042] In this embodiment: the first motor 503 is started, and the first motor 503 drives the first threaded rod 504 to rotate. The rotation of the first threaded rod 504 drives the movable seat 502 to slide in the movable groove 501. The displacement of the movable seat 502 drives the square block 509 to move to one end of the rotating disk 516.

[0043] Please refer to Figures 1 to 6 A second threaded hole is formed on the outer wall of the displacement plate 507 , and the second threaded hole matches the second threaded rod 506 .

[0044] In this embodiment, the second motor 505 is started, and the second motor 505 drives the second threaded rod 506 to rotate. The rotation of the second threaded rod 506 drives the displacement plate 507 to displace. The displacement of the displacement plate 507 drives the square block 509 to insert into the square slot 517.

[0045] Please refer to Figures 1 to 6 The inner wall of the gear ring 515 is provided with ratchet teeth, and one end of the clamping block 518 is engaged with the ratchet teeth.

[0046] In this embodiment, the square block 509 moves out of the square slot 517 , and the clamping block 518 is engaged with the gear ring 515 under the elastic force of the first spring 519 , thereby fixing the rotating disk 516 and preventing the rotating disk 516 from rotating in the reverse direction.

[0047] Please refer to Figures 1 to 6The outer wall of the square block 509 fits into the inner wall of the square groove 517 , and the extrusion block 521 is located at one end of the inner cavity of the square groove 517 and is provided with a first inclined surface. The outer walls of the extrusion block 521 and the clamping block 518 are provided with tooth grooves, which mesh with the spur gear 520 .

[0048] In this embodiment: the square block 509 moves into the square groove 517 and contacts the extrusion block 521, pushing the extrusion block 521 to move. The displacement of the extrusion block 521 drives the spur gear 520 to rotate. The rotation of the spur gear 520 drives the clamping block 518 to move, causing the first spring 519 to be squeezed. The clamping block 518 is displaced and separated from the gear ring 515, thereby canceling the fixation of the rotating disk 516.

[0049] Please refer to Figures 6 to 10 The inner wall of the sliding groove 606 fits with the outer wall of the sliding rod 605, and the inner wall of the fixing groove 607 fits with the outer wall of one end of the fixing block 608.

[0050] In this embodiment, the slide rod 605 can slide in the slide groove 606 , and the fixing block 608 is engaged into the fixing groove 607 by the elastic force of the second spring 609 to fix the baffle 604 , and the baffle 604 blocks the sampling hole 603 .

[0051] Please refer to Figures 6 to 10 A second inclined surface is provided at the bottom of one end of the fixed block 608 located inside the slide rod 605, and a third inclined surface is provided at the bottom of one end of the fixed block 608 extending outside the slide rod 605. The bottom outer wall of the displacement frame 610 contacts the second inclined surface.

[0052] In this embodiment, the connecting rope 611 drives the displacement frame 610 to move relative to the connecting cover 601 . The displacement of the displacement frame 610 pushes the fixing block 608 out of the fixing groove 607 , thereby canceling the fixation of the baffle 604 .

[0053] A method for using a mobile water quality sampler for water quality testing, the specific steps are as follows:

[0054] Step 1: After the mounting bracket 1 is moved to the designated position, the first motor 503 is driven to move the square block 509 to one end of a rotating disk 516 , and then the second motor 505 is started to drive the square block 509 to be inserted into the square slot 517 ;

[0055] Step 2: Start the third motor 508 to drive the winding roller 513 to rotate, and the winding roller 513 lowers the support rope 514 to drive the sampling bottle 4 to move downward into the water body;

[0056] Step 3: When the sampling bottle 4 moves to a depth equal to the length of the preset connecting rope 611 , the sampling hole 603 is automatically opened for sampling.

[0057] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A mobile water quality sampler for water quality testing, comprising a mounting frame (1) and a sampling bottle (4), characterized in that: The bottom end of the mounting frame (1) is fixedly connected to a floating plate (2), and a propeller (3) is installed on the outer wall of the floating plate (2). The sampling bottle (4) is displaced by a moving mechanism (5), and the sampling bottle (4) performs a sampling operation by a sampling mechanism (6). The moving mechanism (5) includes a movable groove (501), and the movable groove (501) is opened at the top of the mounting frame (1). The inner wall of the movable groove (501) is slidably connected to a movable seat (502). One end of the mounting frame (1) is installed with a first motor (503), and the output end of the first motor (503) is connected to a first threaded rod (504). The first threaded rod (504) passes through the movable seat (502), a second motor (505) is installed on the outer wall of the movable seat (502), an output end of the second motor (505) is connected to a second threaded rod (506), an outer wall of the second threaded rod (506) is slidably connected to a displacement plate (507), the displacement plate (507) is slidably connected to the top of the movable seat (502), a third motor (508) is installed on the outer wall of the displacement plate (507), an output end of the third motor (508) is connected to a square block (509), and an inner wall of the mounting frame (1) is fixedly connected to a limit frame (510); The mobile mechanism (5) further comprises a mounting plate (511), the mounting plate (511) being symmetrically fixedly connected to the top end of the mounting frame (1), the outer wall of the mounting plate (511) being rotatably connected to a connecting shaft (512), the outer wall of the connecting shaft (512) being fixedly connected to a winding roller (513), the outer wall of the winding roller (513) being installed with a supporting rope (514), the sampling bottle (4) being located at the bottom end of the supporting rope (514) and located in the inner cavity of the limiting frame (510), one end of the connecting shaft (512) being fixedly connected to a rotating disk (516), the outer wall of the mounting plate (511) being fixedly located on the outer side of the rotating disk (516). A gear ring (515) is fixedly connected, a square groove (517) is opened at one end of the rotating disk (516), a clamping block (518) extending from the rotating disk (516) is slidably connected inside the rotating disk (516), a first spring (519) is connected between the clamping block (518) and the rotating disk (516), a spur gear (520) is rotatably connected inside the rotating disk (516) and located on the outer wall of the clamping block (518), an extrusion block (521) is slidably connected inside the rotating disk (516) and located on the outer wall of the spur gear (520), and one end of the extrusion block (521) extends into the inner cavity of the square groove (517).

2. A mobile water quality sampler for water quality detection according to claim 1, characterized in that: The sampling mechanism (6) includes a connecting cover (601), the connecting cover (601) is threadedly connected to the top of the sampling bottle (4), the bottom end of the supporting rope (514) is fixedly connected to the connecting cover (601), the bottom end of the sampling bottle (4) is installed with a counterweight (602), the top of the connecting cover (601) is provided with a sampling hole (603), the top of the connecting cover (601) is provided with a slide groove (606) on both sides of the sampling hole (603), the inner wall of the slide groove (606) is provided with a fixed groove (607), the inner wall of the slide groove (606) is slidably connected to a slide rod (605), the The top of the slide rod (605) is fixedly connected to a baffle (604), the interior of the slide rod (605) is slidably connected to a fixed block (608) extending from the slide rod (605), a second spring (609) is connected between the fixed block (608) and the slide rod (605), the baffle (604) and the interior of the slide rod (605) are slidably connected to a displacement frame (610), the displacement frame (610) passes through the fixed block (608), the top of the displacement frame (610) is fixedly connected to a connecting rope (611), one end of the connecting rope (611) is fixedly connected to the top of the limit frame (510).

3. A mobile water quality sampler for water quality detection according to claim 1, characterized in that: The inner wall of the movable groove (501) fits in contact with the outer wall of the movable seat (502); the outer wall of the movable seat (502) is provided with a first threaded hole, and the first threaded hole matches the first threaded rod (504).

4. A mobile water quality sampler for water quality detection according to claim 1, characterized in that: A second threaded hole is provided on the outer wall of the displacement plate (507), and the second threaded hole matches the second threaded rod (506).

5. A mobile water quality sampler for water quality detection according to claim 1, characterized in that: The inner wall of the gear ring (515) is provided with ratchet teeth, and one end of the clamping block (518) is engaged with the ratchet teeth.

6. A mobile water quality sampler for water quality testing according to claim 2, characterized in that: The outer wall of the square block (509) is in contact with the inner wall of the square groove (517); the extrusion block (521) is provided with a first inclined surface at one end of the inner cavity of the square groove (517); the outer walls of the extrusion block (521) and the clamping block (518) are provided with tooth grooves, and the tooth grooves are engaged with the spur gear (520).

7. A mobile water quality sampler for water quality testing according to claim 2, characterized in that: The inner wall of the sliding groove (606) is in contact with the outer wall of the sliding rod (605), and the inner wall of the fixing groove (607) is in contact with the outer wall of one end of the fixing block (608).

8. A mobile water quality sampler for water quality testing according to claim 2, characterized in that: A second inclined surface is provided at the bottom of one end of the fixed block (608) located inside the slide rod (605), and a third inclined surface is provided at the bottom of one end of the fixed block (608) extending outside the slide rod (605). The lower end of the displacement frame (610) passes through the fixed block (608) and is connected to a cross bar, and the cross bar is in contact with the second inclined surface.

9. A method for using a mobile water quality sampler for water quality testing according to any one of claims 2, 6, 7 and 8, characterized in that: The specific steps are as follows: Step 1: After the mounting frame (1) is moved to the designated position, the first motor (503) is operated to drive the square block (509) to move to one end of a rotating disk (516), and then the second motor (505) is started to drive the square block (509) to be inserted into the square slot (517); Step 2: Start the third motor (508) to drive the winding roller (513) to rotate, and the winding roller (513) lowers the support rope (514) to drive the sampling bottle (4) to move downward into the water body; Step 3: When the sampling bottle (4) moves to a depth equal to the length of the preset connecting rope (611), the sampling hole (603) automatically opens to perform the sampling operation.

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