Sampling device for water pollution detection

Abstract

The invention provides a sampling device for water pollution detection, and belongs to the technical field of detection equipment, the sampling device comprises a sinking cylinder, a mounting cylinder, a suction pipe and a driving assembly, one end of the suction pipe is rotatably provided with a movable pipe, the movable pipe is communicated with the suction pipe, one end of the movable pipe is provided with a sampling pipe, and the driving assembly is connected with the movable pipe. A sampling barrel is detachably mounted on the mounting barrel, a plurality of sampling cavities and a transfer cavity are formed in the sampling barrel, the sampling cavities are adjacent to the transfer cavity, a through groove is formed in the transfer cavity, the transfer cavity is communicated with the liquid collecting cavity through the through groove, and a force bearing plate is arranged between the liquid collecting cavity and the sampling cavity as well as between the liquid collecting cavity and the transfer cavity; by arranging the transfer cavity, initial water is discharged to the transfer cavity, so that sampling depth data can be more accurate; the outer side of the force bearing plate is inclined towards the sinking cylinder, so that the sampling water can be prevented from being concentrated on the inner side and overflowing through the water inlet corresponding to the sealing plate.

Description

Technical Field

[0001] The invention belongs to the technical field of detection equipment, in particular to a sampling device for water pollution detection. Background Art

[0002] Water quality monitoring is the process of monitoring and measuring the types of pollutants in water bodies, the concentrations of various pollutants and their changing trends, and evaluating the water quality status. The monitoring scope is very wide, including unpolluted and polluted natural water (rivers, lakes, seas and groundwater) and various industrial drainage. The main monitoring items can be divided into two categories: one is comprehensive indicators reflecting water quality status, such as temperature, color, turbidity, pH value, conductivity, suspended solids, dissolved oxygen, chemical oxygen demand and biochemical oxygen demand, etc.; the other is some toxic substances, such as phenol, cyanide, arsenic, lead, chromium, cadmium, mercury and organic pesticides, etc., to objectively evaluate the water quality of rivers and oceans.

[0003] When sampling contaminated water sources, a sampler is needed. Since the types and concentrations of pollutants at different depths in the water source are slightly different, for the sake of detection accuracy, water sources at different depths are generally sampled. In the existing technology, the sampler is often placed completely in the water, and then suction devices set at different depths are used to achieve extraction and sampling at different depths. However, in fact, in the process of inserting the sampling device, it is easy to cause mixing of water bodies at different depths, resulting in inaccurate sampling depth. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a sampling device for water pollution detection.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a sampling device for water pollution detection, comprising a sinking tube and a mounting tube, a suction tube installed in the sinking tube, a mounting tube installed at one end of the sinking tube, a plurality of water leakage holes opened on the surface of the sinking tube, and a driving assembly, a movable tube rotatably installed at one end of the suction tube, a water pump installed on the movable tube, the movable tube being connected to the suction tube, a sampling tube installed at one end of the movable tube, the driving assembly being connected to the movable tube, and the driving assembly being used to drive the movable tube to rotate.

[0006] A sampling cylinder is detachably mounted on the mounting cylinder, and the sampling cylinder is annular as a whole, and the outer wall of the sampling cylinder is fitted with the water outlet end of the sampling tube, and a plurality of sampling chambers and a transfer chamber are arranged in the sampling cylinder, the sampling chamber is adjacent to the transfer chamber, a through groove is provided in the transfer chamber, a liquid collecting chamber is arranged below the sampling chamber and the transfer chamber, the transfer chamber and the liquid collecting chamber are connected through the through groove, a bearing plate is arranged between the liquid collecting chamber, the sampling chamber and the transfer chamber, the bearing plate separates the liquid collecting chamber from the sampling chamber, and the liquid collecting chamber from the transfer chamber, and the outer side of the bearing plate is inclined toward the sinking cylinder;

[0007] Sealing plates are slidably mounted on the inner walls of the sampling cavity and the transfer cavity.

[0008] As a further improvement: a third spring is installed between the sampling cylinder and the mounting cylinder, and a mounting cover is detachably mounted on the mounting cylinder.

[0009] As a further improvement: a first drain pipe is provided on the outer wall of the sampling cavity, a second drain pipe is provided on the outer wall of the liquid collecting cavity, and valves are provided on both the first drain pipe and the second drain pipe.

[0010] As a further improvement scheme: a sliding groove is correspondingly opened on the inner wall of the sampling tube, a sealing plate is slidably installed in the sliding groove, a fourth spring is installed between the sealing plate and the sliding groove, a trapezoidal block is fixedly installed on the sealing plate, and the sampling tube contacts the trapezoidal block during rotation.

[0011] As a further improvement scheme: a support frame is fixedly installed on the sampling tube, a power box is fixedly installed on the mounting cylinder, the power box is rotatably connected to the movable tube, the support frame is slidably installed on the power box, and a telescopic tube is fixedly installed between the sampling tube and the movable tube.

[0012] As a further improvement scheme: a rotation groove and a retreat groove are provided on the power box. When suction and sampling are performed, one end of the support frame is located in the rotation groove, and the retreat groove is L-shaped. When the sampling tube is installed or disassembled, one end of the support frame is located in the retreat groove. An arc plate is elastically installed on the power box, and the arc plate fits with the support frame under relaxed conditions.

[0013] As a further improvement scheme: a conical cover is provided at one end of the sinking cylinder, and a plurality of water leakage holes are also opened on the conical cover.

[0014] As a further improvement scheme: a plurality of segmented plates are fixedly installed on the sinking cylinder, and floating plates are movably installed on both sides of the segmented plates. When the segmented plates are in contact with the floating plates on both sides, the water pump is started.

[0015] As a further improvement scheme: a wedge-shaped column is movably installed on the water leakage hole of the sinking cylinder between the adjacent floating plates and the segmented plates, a mounting seat is fixedly installed on the sinking cylinder, and a first spring is installed between the mounting seat and the wedge-shaped column.

[0016] Compared with the prior art, the present invention has the following advantages: by providing a transfer chamber, initial water can be discharged into the transfer chamber, thus preventing dirt or residual water in the suction pipe from affecting the authenticity of the sampling data; the initial water inlet pipe can be used for flushing before sampling begins; when the next depth is reached, the water remaining in the suction pipe is actually the water sample from the previous depth; therefore, by discharging the initial water into the transfer chamber, the sampling depth data can be made more accurate;

[0017] By setting the outer side of the bearing plate to be inclined toward the sinking cylinder, the sampled water can first flow toward the outer side of the sampling cylinder, thereby preventing the sampled water from concentrating on the inner side and overflowing through the water inlet corresponding to the sealing plate.

[0018] By providing the liquid collecting chamber, the sampled water and the initial water can be completely separated in the early stage, thereby preventing the water in the transfer chamber and the sampling chamber from mixing due to external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a sampling device for water pollution detection;

[0020] Figure 2 This is a schematic diagram of the installation cover and installation cylinder structure of a sampling device for water pollution detection;

[0021] Figure 3 This is a schematic diagram of the installation cover structure of a sampling device for water pollution detection;

[0022] Figure 4 This is a schematic diagram of the installation tube structure of a sampling device for water pollution detection;

[0023] Figure 5 A schematic diagram of the cross-sectional structure of the mounting tube of a sampling device for water pollution detection Figure 1 ;

[0024] Figure 6 A schematic diagram of the cross-sectional structure of the mounting tube of a sampling device for water pollution detection Figure 2 ;

[0025] Figure 7 This is a schematic diagram of the structure of a sampling tube of a sampling device for water pollution detection;

[0026] Figure 8 This is a schematic diagram of the transverse cross-sectional structure of a sampling tube of a sampling device for water pollution detection;

[0027] Figure 9 This is a schematic diagram of the vertical cross-section structure of a sampling tube of a sampling device for water pollution detection;

[0028] Figure 10 This is a schematic diagram of the sliding slot structure of a sampling device for water pollution detection;

[0029] Figure 11 This is a schematic diagram of the power box structure of a sampling device for water pollution detection;

[0030] Figure 12 This is a schematic diagram of the support structure of a sampling device for water pollution detection;

[0031] Figure 13 This is a schematic diagram of the curved plate structure of a sampling device for water pollution detection;

[0032] Figure 14 This is a schematic diagram of the overall cross-sectional structure of a sampling device for water pollution detection;

[0033] Figure 15 This is a schematic diagram of the cross-sectional structure of the upper end of the sinking tube of a sampling device for water pollution detection;

[0034] Figure 16 This is a schematic diagram of the cross-sectional structure of the middle end of the sinking tube of a sampling device for water pollution detection; Figure 17 This is a schematic diagram of the wedge column structure of a sampling device for water pollution detection;

[0035] Figure: 1, mounting tube; 2, sinking tube; 20, segmented plate; 21, wedge-shaped column; 22, mounting seat; 23, telescopic rod; 24, first spring; 25, rotating disk; 26, knob; 3, conical cover; 4, sampling tube; 40, sliding groove; 41, first drain pipe; 42, second drain pipe; 43, sampling chamber; 44, transfer chamber; 45, first partition; 46, second partition; 460, notch; 47, through-groove; 48, liquid collecting chamber; 49, bearing plate; 5, power box; 51, rotating Groove; 52, fixed plate; 53, retreat groove; 54, second spring; 55, arc plate; 6, drive assembly; 61, driving gear; 62, motor; 63, driven gear; 7, third spring; 8, suction tube; 9, floating plate; 10, mounting cover; 101, handle; 102, internal thread; 11, retreat groove; 12, external thread; 13, movable tube; 14, telescopic tube; 15, trapezoidal block; 16, sealing plate; 17, fourth spring; 18, sampling tube; 19, support frame; 190, roller. DETAILED DESCRIPTION

[0036] The technical solution of the present application will be further described in detail below in conjunction with specific implementation methods.

[0037] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0038] See also Figures 1 to 16 In one embodiment, a sampling device for water pollution detection includes a sinking tube 2 and a mounting tube 1. A suction tube 8 is installed in the sinking tube 2. The mounting tube 1 is installed at one end of the sinking tube 2. A plurality of water leakage holes are opened on the surface of the sinking tube 2. It also includes a driving assembly 6. A movable tube 13 is rotatably installed at one end of the suction tube 8. A water pump is installed on the movable tube 13. The movable tube 13 is connected to the suction tube 8. A sampling tube 18 is installed at one end of the movable tube 13. The movable tube 13 is connected to the sampling tube 18. The driving assembly 6 is connected to the movable tube 13, and the driving assembly 6 is used to drive the movable tube 13 to rotate.

[0039] A sampling cylinder 4 is detachably mounted on the mounting cylinder 1. The sampling cylinder 4 is annular as a whole. The outer wall of the sampling cylinder 4 fits with the water outlet end of the sampling tube 18. A plurality of sampling chambers 43 and a transfer chamber 44 are provided in the sampling cylinder 4. The sampling chamber 43 is adjacent to the transfer chamber 44. A through groove 47 is provided in the transfer chamber 44. A liquid collecting chamber 48 is provided below the sampling chamber 43 and the transfer chamber 44. The transfer chamber 44 is connected to the liquid collecting chamber 48 through the through groove 47. A bearing plate 49 is provided between the liquid collecting chamber 48 and the sampling chamber 43 and the transfer chamber 44. The bearing plate 49 separates the liquid collecting chamber 48 from the sampling chamber 43 and the liquid collecting chamber 48 from the transfer chamber 44. The outer side of the bearing plate 49 is inclined toward the sinking cylinder 2.

[0040] A sealing plate 16 is slidably mounted on the inner walls of the sampling cavity 43 and the transfer cavity 44 .

[0041] In this embodiment, a first partition 45 and a second partition 46 are fixedly mounted on the load-bearing plate 49 , the plurality of sampling chambers 43 are separated by the first partition 45 , and the sampling chamber 43 and the transfer chamber 44 are separated by the second partition 46 , and a notch 460 is provided on one end of the second partition 46 close to the sampling tube 18 .

[0042] When sampling, several of the sampling chambers 43 are numbered. In the initial state, the sampling tube 18 is aligned with the transfer chamber 44, and the sealing plate 16 is opened. When the specified depth is reached, the water pump is started and water is pumped. At this time, the movable tube 13 rotates synchronously. When the movable tube 13 rotates, the sampling tube 18 rotates synchronously, so that the initial water is discharged into the transfer chamber 44, which can prevent the dirt or residual water in the suction tube 8 from affecting the authenticity of the sampling data, thereby flushing through the initial water inlet pipeline. As the rotation proceeds, the later water is discharged into the sampling chamber 43. After reaching the specified water volume, the water pump is turned off. At this time, the movable tube 13 continues to rotate until the movable tube 13 rotates to align with the next transfer chamber 44. When the next depth is reached, the water remaining in the suction tube 8 is actually the water sample of the previous depth. Therefore, by discharging the initial water to the transfer chamber 44, the sampling depth data can be made more accurate.

[0043] The water in the transfer chamber 44 enters the liquid collecting chamber 48 through the through groove 47. By setting the outer side of the bearing plate 49 to be inclined toward the sinking cylinder 2, the sampled water can first flow toward the outer side of the sampling cylinder 4, thereby avoiding the sampled water concentrating on the inside and causing overflow through the water inlet corresponding to the sealing plate 16.

[0044] Secondly, by providing the liquid collecting chamber 48 , the sampled water and the initial water can be completely separated in the early stage, thereby preventing the water in the transfer chamber 44 and the water in the sampling chamber 43 from mixing due to external force.

[0045] See also Figures 1 to 7 In one embodiment, a third spring 7 is installed between the sampling cylinder 4 and the mounting cylinder 1 , and a mounting cover 10 is detachably mounted on the mounting cylinder 1 .

[0046] In this embodiment, the detachable installation method of the mounting cover 10 and the mounting tube 1 is threaded installation. An external thread 12 is installed at one end of the mounting tube 1, and an internal thread 102 that cooperates with the external thread 12 is provided on the inner wall of the mounting cover 10. A handle 101 is fixedly installed on the mounting cover 10.

[0047] When installing the sampling cylinder 4, first push the sampling tube 18, so that the telescopic tube 14 connected to the sampling tube 18 is retracted, thereby making the roller 190 on the support frame 19 enter the retreat groove 53, and the actual moving trajectory is an L-shaped trajectory. During the movement, the arc plate 55 is always close to the support frame 19. At this time, the position of the support frame 19 and the sampling tube 18 can be fixed, so that the distance between the sampling tube 18 and the mounting tube 1 is increased, which is convenient for the installation of the sampling cylinder 4. Then align the first drain pipe 41 and the second drain pipe 42 on the sampling cylinder 4 with the retreat groove 11, and slowly lower the sampling cylinder 4. When the bottom of the sampling cylinder 4 contacts the third spring 7, the top of the sampling cylinder 4 extends out of the mounting tube 1, and then rotate the mounting cover 10. The internal thread 102 of the mounting cover 10 cooperates with the external thread 12 of the mounting tube 1 to squeeze the sampling cylinder 4 down, thereby achieving the sealing of the power box 5 and the sampling cylinder 4;

[0048] When the sampling tube 4 is disassembled, the mounting cover 10 is opened, and then the sampling tube 4 is bounced up by the third spring 7 and extends out of the mounting tube 1, so that it is easy to take out.

[0049] See also Figure 6 、 Figure 7 In one embodiment, a first drain pipe 41 is provided on the outer wall of the sampling chamber 43, and a second drain pipe 42 is provided on the outer wall of the liquid collecting chamber 48. Valves are provided on both the first drain pipe 41 and the second drain pipe 42.

[0050] In this embodiment, the installation tube 1 is provided with a clearance groove 11 corresponding to the first drainage pipe 41 and the second drainage pipe 42 .

[0051] By providing the first drain pipe 41, the second drain pipe 42 and the give way groove 11, the give way groove 11 can achieve give way and at the same time limit the positions of the first drain pipe 41 and the second drain pipe 42, so that the position of the sampling tube 4 can be fixed to prevent the sampling tube 4 from rotating or moving vertically under the action of external force.

[0052] See also Figure 8 、 Figure 9 and Figure 10 In one embodiment, a sliding groove 40 is correspondingly opened on the inner wall of the sampling tube 4, a sealing plate 16 is slidably installed in the sliding groove 40, a fourth spring 17 is installed between the sealing plate 16 and the sliding groove 40, a trapezoidal block 15 is fixedly installed on the sealing plate 16, and the sampling tube 18 contacts the trapezoidal block 15 during the rotation process.

[0053] In this embodiment, water inlets are opened on the inner and outer walls of the sampling chamber 43 and the transfer chamber 44 , and the sealing plate 16 blocks the water inlets of the sampling chamber 43 and the transfer chamber 44 .

[0054] When the sampling tube 18 rotates, the sampling tube 18 contacts the trapezoidal block 15 and first descends, then stops, and then rises. When the sampling tube 18 contacts the inclined surface on one side of the trapezoidal block 15, the sampling tube 18 squeezes the sealing plate 16 downward to open the water inlet. When the sampling tube 18 contacts the top surface of the trapezoidal block 15, the sampling tube 18 can drain water to the transfer chamber 44 and the sampling chamber 43. When the sampling tube 18 contacts the inclined surface on the other side of the trapezoidal block 15, the sealing plate 16 is closed under the action of the fourth spring 17.

[0055] See also Figure 11 、 Figure 12 and Figure 13 In one embodiment, a support frame 19 is fixedly installed on the sampling tube 18, a power box 5 is fixedly installed on the mounting tube 1, the power box 5 is rotatably connected to the movable tube 13, the support frame 19 is slidably installed on the power box 5, and a telescopic tube 14 is fixedly installed between the sampling tube 18 and the movable tube 13.

[0056] In this embodiment, the telescopic tube 14 is located on the side of the support frame 19 away from the sampling tube 18. The driving assembly 6 includes a driving gear 61, a driven gear 63, and a motor 62. The motor 62 and the water pump are located inside the power box 5. The driving gear 61 is installed at the output end of the motor 62. The driven gear 63 is fixedly installed on the movable tube 13, and the driven gear 63 is meshed with the driving gear 61.

[0057] The telescopic tube 14 allows the distance between the sampling tube 18 and the sampling cylinder 4 to be adjusted, thereby facilitating the installation of the sampling cylinder 4 .

[0058] See also Figure 11 、 Figure 12 and Figure 13 In one embodiment, a rotation groove 51 and a retreat groove 53 are provided on the power box 5. When sampling is performed, one end of the support frame 19 is located in the rotation groove 51, and the retreat groove 53 is L-shaped. When the sampling tube 4 is installed or removed, one end of the support frame 19 is located in the retreat groove 53. An arc plate 55 is elastically installed on the power box 5, and the arc plate 55 fits with the support frame 19 under a relaxed condition.

[0059] In this embodiment, the rotation groove 51 is connected to the retreat groove 53, and a fixing plate 52 is installed on the surface of the power box 5. A second spring 54 is connected between the fixing plate 52 and the arc plate 55;

[0060] A roller 190 is rotatably mounted on one end of the support frame 19 , and the roller 190 is located in the rotation groove 51 or the retreat groove 53 .

[0061] When installing the sampling tube 4, the sampling tube 18 is first pushed to shrink the telescopic tube 14 connected to the sampling tube 18, so that the roller 190 on the support frame 19 enters the retreat groove 53. The actual movement trajectory is an L-shaped trajectory. During the movement, the arc plate 55 is always close to the support frame 19. At this time, the position of the support frame 19 and the sampling tube 18 can be fixed, so that the distance between the sampling tube 18 and the installation tube 1 is increased, which facilitates the installation of the sampling tube 4.

[0062] See also Figure 1 、 Figure 14 In one embodiment, a conical cover 3 is provided at one end of the sinking cylinder 2, and a plurality of water leakage holes are also opened on the conical cover 3.

[0063] In this embodiment, the conical cover 3 is provided to expand the suction space at the bottom of the suction pipe 8 , thereby preventing weeds or algae at the bottom from clogging the suction pipe 8 or reducing the flow rate.

[0064] See also Figure 14 、 Figure 15 and Figure 16 In one embodiment, a plurality of segmented plates 20 are fixedly mounted on the sinking cylinder 2, and floating plates 9 are movably mounted on both sides of the segmented plates 20. When the segmented plates 20 are in contact with the floating plates 9 on both sides, the water pump is started.

[0065] In this embodiment, the prior art generally adopts the method of inserting the sampling device into the water body and then sampling at different depths. However, in the process of inserting the sampling device, it is easy to cause mixing of water bodies at different depths, so that the sampling depth is inaccurate. Based on this, in this embodiment, sampling is carried out while inserting. When inserted to the predetermined depth, the floating plate 9 floats up due to the buoyancy so that the floating plate 9 below fits with the segmented plate 20. Therefore, the water pump is started at this time to sample the water body at the predetermined depth. The several segmented plates 20 are set within the predetermined depth and are evenly distributed.

[0066] See also Figure 16 、 Figure 17 In one embodiment, a wedge-shaped column 21 is movably installed on the water leakage hole of the sinking cylinder 2 between the adjacent floating plate 9 and the segmented plate 20, and a mounting seat 22 is fixedly installed on the sinking cylinder 2. A first spring 24 is installed between the mounting seat 22 and the wedge-shaped column 21.

[0067] In this embodiment, a rotating disk 25 is rotatably mounted on the mounting seat 22 , a telescopic rod 23 is fixedly mounted on the rotating disk 25 , one end of the telescopic rod 23 is slidably connected to the wedge-shaped column 21 , and a knob 26 is fixedly mounted on the rotating disk 25 .

[0068] Sampling at different depths can be achieved by providing a plurality of segmented plates 20 and floating plates 9. The plurality of segmented plates 20 and floating plates 9 form a parallel circuit. Both the floating plates 9 and the segmented plates 20 are provided with conductors. When the sampling depth interval is greater than the distance between adjacent segmented plates 20, it is necessary to cancel the sampling depths of some of the segmented plates 20 and floating plates 9.

[0069] For example, the distance between the segmented plates 20 is 20 cm, and the required depth is 40 cm. At this time, the rotating disk 25 at the corresponding position is rotated by the knob 26 so that the arc surface of the wedge-shaped column 21 is aligned with the position of the floating plate 9 below. At this time, the floating plate 9 will be blocked by the arc surface of the wedge-shaped column 21 during the rising process, and thus cannot fit with the segmented plate 20 above, making it impossible to perform suction sampling at this depth.

[0070] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be embraced herein, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0071] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A sampling device for water pollution detection, comprising a sinking tube and a mounting tube, wherein a suction tube is installed in the sinking tube, a mounting tube is installed at one end of the sinking tube, and a plurality of water leakage holes are opened on the surface of the sinking tube, characterized in that: It also includes a driving assembly, a movable tube is rotatably installed at one end of the suction tube, a water pump is installed on the movable tube, the movable tube is connected to the suction tube, a sampling tube is installed at one end of the movable tube, the driving assembly is connected to the movable tube, and the driving assembly is used to drive the movable tube to rotate. A sampling cylinder is detachably mounted on the mounting cylinder, and the sampling cylinder is annular as a whole, and the outer wall of the sampling cylinder is fitted with the water outlet end of the sampling tube, and a plurality of sampling chambers and a transfer chamber are arranged in the sampling cylinder, the sampling chamber is adjacent to the transfer chamber, a through groove is provided in the transfer chamber, a liquid collecting chamber is arranged below the sampling chamber and the transfer chamber, the transfer chamber and the liquid collecting chamber are connected through the through groove, a bearing plate is arranged between the liquid collecting chamber, the sampling chamber and the transfer chamber, the bearing plate separates the liquid collecting chamber from the sampling chamber, and the liquid collecting chamber from the transfer chamber, and the outer side of the bearing plate is inclined toward the sinking cylinder; Sealing plates are slidably mounted on the inner walls of the sampling cavity and the transfer cavity.

2. A water pollution detection sampling device according to claim 1, characterized in that: A third spring is installed between the sampling cylinder and the installation cylinder, and a mounting cover is detachably mounted on the installation cylinder.

3. A water pollution detection sampling device according to claim 1, characterized in that: A first drain pipe is provided on the outer wall of the sampling cavity, and a second drain pipe is provided on the outer wall of the liquid collecting cavity. Both the first drain pipe and the second drain pipe are provided with valves.

4. A water pollution detection sampling device according to claim 1, characterized in that: A sliding groove is correspondingly opened on the inner wall of the sampling cylinder, a sealing plate is slidably installed in the sliding groove, a fourth spring is installed between the sealing plate and the sliding groove, a trapezoidal block is fixedly installed on the sealing plate, and the sampling tube contacts the trapezoidal block during rotation.

5. A water pollution detection sampling device according to claim 1 or 4, characterized in that: A support frame is fixedly installed on the sampling tube, a power box is fixedly installed on the installation cylinder, the power box is rotatably connected to the movable tube, the support frame is slidably installed on the power box, and a telescopic tube is fixedly installed between the sampling tube and the movable tube.

6. A water pollution detection sampling device according to claim 5, characterized in that: The power box is provided with a rotation groove and a retreat groove. When sampling is performed, one end of the support frame is located in the rotation groove. The retreat groove is L-shaped. When the sampling tube is installed or removed, one end of the support frame is located in the retreat groove. An arc plate is elastically installed on the power box, and the arc plate fits with the support frame under a relaxed condition.

7. A sampling device for water pollution detection according to claim 1, characterized in that: One end of the sinking cylinder is provided with a conical cover, and the conical cover is also provided with a plurality of water leakage holes.

8. A water pollution detection sampling device according to claim 1 or 7, characterized in that: A plurality of segmented plates are fixedly mounted on the sinking cylinder, and floating plates are movably mounted on both sides of the segmented plates. When the segmented plates are in contact with the floating plates on both sides, the water pump is started.

9. A sampling device for water pollution detection according to claim 8, characterized in that: The sinking cylinder is located on a water leakage hole between the adjacent floating plates and the segmented plates, and a wedge-shaped column is movably installed thereon. A mounting seat is fixedly installed on the sinking cylinder, and a first spring is installed between the mounting seat and the wedge-shaped column.

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