Water quality sampling and monitoring device for environment detection and operation method of water quality sampling and monitoring device

Abstract

The invention discloses a water quality sampling and monitoring device for environment detection and an operation method thereof, relates to the technical field of water quality monitoring, and solves the problems that when water quality sampling equipment is used, the water quality monitoring result is inaccurate due to single sampling position, the sampling position is difficult to maintain at the same water depth position, and the water quality monitoring result is not accurate. And in the sampling process, fishes, shrimps and other organisms are easily sampled at the same time, so that the detected water quality result is inaccurate. Comprising a protection mechanism, six pushing mechanisms are arranged on the outer surface of the protection mechanism, a plurality of sampling mechanisms are arranged at the bottom ends of the pushing mechanisms, and connecting mechanisms are connected to the surfaces of the sampling mechanisms. The sampling ball is pushed out of the storage barrel through the electric telescopic cylinder, so that the sampling ball is pushed out to the position farther from the hexagonal rod, multi-point sampling at the same water depth position is achieved, and the situation that the detection result of single sampling is inaccurate is avoided.

Description

Technical Field

[0001] The invention relates to the field of water quality monitoring, and in particular to a water quality sampling monitoring device for environmental testing and an operating method thereof. Background Art

[0002] Environmental monitoring refers to the activities of environmental monitoring agencies to monitor and measure the environmental quality. Environmental monitoring is to determine the environmental pollution status and the level of environmental quality by monitoring and measuring indicators that reflect environmental quality. The content of environmental monitoring mainly includes the monitoring of physical indicators, chemical indicators and ecosystems. Water quality monitoring is required during environmental monitoring. 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 water quality. The monitoring scope is very wide, including unpolluted and polluted natural water and various industrial drainage, etc. Water sampling refers to the collection of water samples from polluted water bodies and the analysis and determination to obtain basic data on water pollution. Water samples for analysis should be representative and reflect the chemical composition and characteristics of the water body. The sampling method, location, time, and frequency are all determined based on the characteristics of the water body and the purpose of the analysis.

[0003] When using existing water quality sampling equipment, the water quality monitoring results are often inaccurate due to the single sampling location. The sampling location is difficult to maintain at the same water depth, and fish and shrimp and other organisms are easily sampled at the same time during the sampling process, resulting in inaccurate water quality results. Therefore, it does not meet the existing needs. In this regard, we propose a water quality sampling monitoring device for environmental testing and its operation method. Summary of the invention

[0004] The object of the present invention is to provide a water quality sampling monitoring device for environmental testing and an operating method thereof, so as to solve the problems raised in the above-mentioned background technology that when the quality sampling equipment is used, the water quality monitoring results are often inaccurate due to the single sampling position, and the sampling position is difficult to maintain at the same water depth position, and fish and shrimp and other organisms are easily sampled at the same time during the sampling process, resulting in inaccurate water quality results.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a water quality sampling and monitoring device for environmental testing, comprising a protection mechanism, six pushing mechanisms are arranged on the outer surface of the protection mechanism, a plurality of sampling mechanisms are arranged at the bottom end of the pushing mechanism, and the surfaces of the sampling mechanisms are all connected with connecting mechanisms; The sampling mechanism includes a sampling ball, a sealing plate, a sampling cavity and an electric push rod. The sampling balls are movably installed below the pushing mechanism. A water inlet is provided on one side surface of the sampling ball. A sealing plate is movably installed inside the water inlet. A sampling cavity is provided inside the sampling ball. An electric push rod is fixedly installed inside the sampling cavity. The output end of the electric push rod is fixedly connected to the surface of the sealing plate.

[0006] Preferably, the sampling mechanism also includes an annular baffle, the outer surface of the sampling ball is provided with two positioning grooves, the outer surface of the sampling ball is provided with two hemispherical clamping grooves, the axes of the two positioning grooves, the two hemispherical clamping grooves and the sealing plate are perpendicular to each other, the two positioning grooves are symmetrically distributed, the two hemispherical clamping grooves are symmetrically distributed, the outer surface of the sampling ball near the hemispherical clamping grooves are provided with clamping grooves, and the inner wall of the electric push rod near the water inlet is fixedly installed with an annular baffle.

[0007] Preferably, the protective mechanism includes a fixing frame, a lifting ring, a hexagonal rod, a connecting column and a protective net, the top end of the fixing frame is fixedly installed with a lifting ring, the bottom end of the fixing frame is fixedly installed with a hexagonal rod, the bottom end of the hexagonal rod is fixedly installed with a connecting column, and the bottom end of the connecting column is fixedly connected to the protective net.

[0008] Preferably, the pushing mechanism includes a waterproof box, an electric telescopic cylinder, a connecting block, a storage cylinder and a positioning rod, the six waterproof boxes are respectively fixedly mounted on the six outer surfaces of the hexagonal rod, the electric telescopic cylinders are fixedly mounted inside the waterproof boxes, the output ends of the electric telescopic cylinders are fixedly connected to the connecting blocks, the bottom ends of the connecting blocks are provided with connecting bottom grooves, storage cylinders are provided below the waterproof boxes, the storage cylinders are fixedly connected to the six outer surfaces of the hexagonal rods, positioning rods are fixedly mounted on both sides of the storage cylinders, the bottom ends of the positioning rods penetrate the bottom ends of the storage cylinders and extend in a circular arc shape to the lower position of the storage cylinders, the outer surfaces of the connecting blocks are provided with two connecting side grooves, and the positioning rods are movably inserted into the insides of the connecting side grooves.

[0009] Preferably, the connecting mechanism includes a limit plug plate, a connecting ball, a connecting rod and a clamping ring, the surface of the sampling ball is movably mounted with a limit plug plate corresponding to the position of the hemispherical slot, the surface of the limit plug plate is fixedly mounted with a clamping ring, the inner side of the limit plug plate is movably mounted with a connecting ball, the outer surface of the limit plug plate and the outer surface of the connecting ball are fitted together, and a connecting rod is fixedly connected between two adjacent connecting balls.

[0010] Preferably, the connecting mechanism also includes a movable latch, a compression spring and a limit plate. A movable latch is movably installed on the outer surface of the sampling ball near the hemispherical slot, and a spring groove is provided inside the sampling ball near the movable latch. A limit plate is fixedly installed on the outer surface of the movable latch, and the limit plate is movably inserted into the inside of the spring groove. A compression spring is movably installed between the limit plate and the inside of the spring groove, and a limit groove is provided on the surface of the clamping ring, and one end of the inner side of the movable latch is movably inserted into the inside of the limit groove.

[0011] Preferably, the bottom end of the connecting block is movably inserted into the top end of the storage tube, the six connecting balls at the top are movably inserted into the inside of the connecting bottom groove, the positioning rods are movably inserted into the inside of the positioning groove, and the sampling balls are movably inserted into the inside of the storage tube.

[0012] Preferably, the snap rings are movably snapped into the interior of the snap grooves, and the connecting balls are movably snapped into the interior of the hemispherical snap grooves.

[0013] Preferably, a water depth sensor is provided on one surface of the hexagonal rod near the bottom.

[0014] An operating method of a water quality sampling and monitoring device for environmental testing, the operating method comprising the following steps: Step A: First, select different numbers of sampling balls according to the water depth to be detected, and install the sampling balls into the storage tube along the positioning rod, so that multiple sampling balls are connected to each other through the limit plug plate and the connecting ball, and then connect the sampling ball closest to the connecting block to the connecting block through the connecting ball to complete the installation of the device; Step B: Use the lifting equipment to hang the lifting ring and put the device into the water. When the device sinks to the specified sampling depth, start the electric telescopic cylinder to push the connecting block down, so that the connecting block pushes the sampling ball to move along the direction of the storage tube and the positioning rod. At this time, the sampling ball will be pushed out of the storage tube and pushed to a position close to the end of the positioning rod, thereby realizing multi-point sampling; Step C: After the device is placed in water, the current water depth position is detected by the water depth sensor. When the personnel observe that it has reached the specified water depth position, the electric push rod is started to drive the output end to push out, so that the sealing plate is pushed out from the water inlet on the surface of the sampling ball, so that the sealing plate no longer seals the water inlet. At this time, water will enter the interior of the sampling cavity through the gap between the water inlet and the sealing plate, thereby completing the water sampling work. Then, the electric push rod is retracted to the output end, so that the sealing plate touches the annular baffle, thereby sealing the water inlet again to prevent the sampled water from leaking out. Then, the device is taken out of the water by the hoisting equipment, and the sampled water is taken out of the sampling ball, and the water quality sampling operation can be completed; Step D: When the device enters the water, the protective net can be used to protect the device to prevent the bottom of the device from being hit and causing the sampling ball to fall off, thereby affecting the sampling of water by the sampling ball. By setting up the protective net, when the device is placed in the water, the protective net will push the nearby water flow after entering the water, thereby scaring nearby fish and shrimps away from the detection site, preventing them from entering the interior of the sampling ball and affecting the detection results of the sampled water quality.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the positioning rod and the sampling ball so that when the device is in use, the electric telescopic cylinder can drive the connecting block to move downward, so that the connecting block pushes the sampling ball to move downward, and then the connecting ball pushes each sampling ball to move simultaneously, thereby pushing the sampling ball out of the storage tube, thereby pushing the sampling ball to a position farther away from the hexagonal rod, thereby realizing multi-point sampling at the same water depth position, avoiding the situation where the detection result of a single sampling is inaccurate.

[0016] 2. The present invention cooperates with the sampling mechanism and the connecting mechanism so that when the device is in use, the sampling mechanism can be connected through the connecting mechanism, so that the device can be installed with different numbers of sampling mechanisms for sampling according to the detection requirements, thereby improving the accuracy of water quality detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the sampling mechanism of the present invention; Figure 3 A cross-sectional front view of the present invention as a whole; Figure 4 A cross-sectional top view of the present invention as a whole; Figure 5 For the present invention Figure 3 Schematic diagram of the local structure of part A; Figure 6 For the present invention Figure 4 Schematic diagram of the local structure of part B; Figure 7 For the present invention Figure 5 Schematic diagram of the local structure of part C; Figure 8 For the present invention Figure 1 Schematic diagram of the local structure of part D.

[0018] In the figure: 1. Protective mechanism; 101. Fixing frame; 102. Lifting ring; 103. Hexagonal rod; 104. Connecting column; 105. Protective net; 2. Pushing mechanism; 201. Waterproof box; 202. Electric telescopic cylinder; 203. Connecting block; 204. Storage cylinder; 205. Positioning rod; 206. Connecting bottom groove; 207. Connecting side groove; 3. Sampling mechanism; 301. Sampling ball; 302. Positioning groove; 303, sealing plate; 304, sampling chamber; 305, electric push rod; 306, annular baffle; 307, hemispherical slot; 308, snap-in slot; 4, connecting mechanism; 401, limit plate; 402, connecting ball; 403, connecting rod; 404, movable latch; 405, snap-in ring; 406, spring groove; 407, compression spring; 408, limit plate; 409, limit groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 7 , an embodiment of the present invention provides: a water quality sampling and monitoring device for environmental testing, comprising a protection mechanism 1, six pushing mechanisms 2 are arranged on the outer surface of the protection mechanism 1, a plurality of sampling mechanisms 3 are arranged at the bottom end of the pushing mechanism 2, and the surfaces of the sampling mechanisms 3 are all connected with connecting mechanisms 4; The sampling mechanism 3 includes a sampling ball 301, a sealing plate 303, a sampling cavity 304 and an electric push rod 305. The sampling balls 301 are movably installed under the pushing mechanism 2. A water inlet is provided on one side surface of the sampling ball 301. The sealing plate 303 is movably installed inside the water inlet. The sampling ball 301 is provided with a sampling cavity 304. The sampling cavity 304 is fixedly installed with an electric push rod 305. The output end of the electric push rod 305 is fixedly connected to the surface of the sealing plate 303.

[0021] The sampling mechanism 3 also includes an annular baffle 306. The outer surface of the sampling ball 301 is provided with two positioning grooves 302. The outer surface of the sampling ball 301 is provided with two hemispherical clamping grooves 307. The axes of the two positioning grooves 302, the two hemispherical clamping grooves 307 and the sealing plate 303 are perpendicular to each other. The two positioning grooves 302 are symmetrically distributed with each other. The two hemispherical clamping grooves 307 are symmetrically distributed with each other. The outer surface of the sampling ball 301 near the hemispherical clamping grooves 307 is provided with a clamping groove 308. The inner wall of the electric push rod 305 near the water inlet is fixedly installed with an annular baffle 306.

[0022] The protection mechanism 1 includes a fixing frame 101, a lifting ring 102, a hexagonal rod 103, a connecting column 104 and a protection net 105. The lifting ring 102 is fixedly installed on the top of the fixing frame 101, the hexagonal rod 103 is fixedly installed on the bottom end of the fixing frame 101, the connecting column 104 is fixedly installed on the bottom end of the hexagonal rod 103, and the bottom end of the connecting column 104 is fixedly connected to the protection net 105, wherein a water depth sensor is provided on one surface of the hexagonal rod 103 near the bottom.

[0023] The pushing mechanism 2 includes a waterproof box 201, an electric telescopic cylinder 202, a connecting block 203, a storage cylinder 204 and a positioning rod 205. The six waterproof boxes 201 are respectively fixedly installed on the six outer surfaces of the hexagonal rod 103. The electric telescopic cylinder 202 is fixedly installed inside the waterproof box 201. The output end of the electric telescopic cylinder 202 is fixedly connected to the connecting block 203. The bottom end of the connecting block 203 is provided with a connecting bottom groove 206. The bottom of the waterproof box 201 is provided with a storage cylinder 204. The storage cylinder 204 is fixedly connected to the six outer surfaces of the hexagonal rod 103. Positioning rods 205 are fixedly installed on both sides of the storage cylinder 204. The bottom end of the positioning rod 205 passes through the bottom end of the storage cylinder 204 and extends to the lower position of the storage cylinder 204 in an arc shape. The outer surface of the connecting block 203 is provided with two connecting side grooves 207, and the positioning rods 205 are movably inserted into the inside of the connecting side grooves 207.

[0024] The connecting mechanism 4 includes a limit plate 401, a connecting ball 402, a connecting rod 403 and a clamping ring 405. The surface of the sampling ball 301 is movably installed with a limit plate 401 corresponding to the position of the hemispherical slot 307, and the surface of the limit plate 401 is fixedly installed with a clamping ring 405. The inner side of the limit plate 401 is movably installed with a connecting ball 402. The outer surface of the limit plate 401 and the outer surface of the connecting ball 402 are in contact with each other, and a connecting rod 403 is fixedly connected between two adjacent connecting balls 402.

[0025] The connecting mechanism 4 also includes a movable latch 404, a compression spring 407 and a limit plate 408. The outer surface of the sampling ball 301 is movably installed with a movable latch 404 near the hemispherical slot 307. The inside of the sampling ball 301 is provided with a spring groove 406 near the movable latch 404. The outer surface of the movable latch 404 is fixedly installed with a limit plate 408. The limit plate 408 is movably inserted into the inside of the spring groove 406. A compression spring 407 is movably installed between the limit plate 408 and the inside of the spring groove 406. The surface of the clamping ring 405 is provided with a limit groove 409. One end of the inner side of the movable latch 404 is movably inserted into the inside of the limit groove 409. The clamping ring 405 is movably inserted into the inside of the clamping groove 308. The connecting ball 402 is movably inserted into the inside of the hemispherical slot 307.

[0026] Through the cooperation of the sampling mechanism 3 and the connecting mechanism 4, when the device is in use, different numbers of sampling balls 301 can be selected according to the water depth to be detected. When connecting two or more sampling balls 301, the limiting plug plate 401 and the connecting ball 402 can be first moved close to the inside of the hemispherical slot 307 at one end of one of the sampling balls 301. At this time, the two movable latches 404 close to the position of the limiting plug plate 401 are pulled outward, and then the limiting plug plate 401 and the connecting ball 402 are inserted into the inside of the hemispherical slot 307, and the clamping ring 405 is inserted into the inside of the clamping slot 308, and the movable latch 404 is released. At this time, the movable latch 404 will be ejected by the elastic potential energy of the compression spring 407 and clamped into the inside of the limiting slot 409, thereby limiting the limiting plug plate 401 and the connecting ball 402. The connecting ball 402 connected by the connecting rod 403 and the limiting plug plate 401 are inserted into the inside of the hemispherical slot 307 on the surface of another sampling ball 301 in the same way, so that two or more sampling balls 301 are connected to each other through the limiting plug plate 401 and the connecting ball 402, and then the positioning slot 302 on the surface of the sampling ball 301 is aligned with the positioning rod 205, so that the positioning rod 205 is inserted into the inside of the positioning slot 302, so that the sampling ball 301 is installed into the inside of the storage tube 204 along the positioning rod 205, and then the sampling ball 301 closest to the connecting block 203 is connected to the connecting block 203 through the connecting ball 402, and the installation of the device is completed, so that the device can be installed with different numbers of sampling mechanisms 3 for sampling, thereby improving the accuracy of water quality detection.

[0027] The bottom end of the connecting block 203 is movably inserted into the top end of the storage tube 204 , the six connecting balls 402 at the top are all movably inserted into the inside of the connecting bottom groove 206 , the positioning rods 205 are all movably inserted into the inside of the positioning groove 302 , and the sampling balls 301 are all movably inserted into the inside of the storage tube 204 .

[0028] Through the cooperation of the positioning rod 205 and the sampling ball 301, when the device is in use, the electric telescopic cylinder 202 can drive the connecting block 203 to move downward, so that the connecting block 203 pushes the sampling ball 301 to move downward, and then the connecting ball 402 pushes each sampling ball 301 to move simultaneously, thereby pushing the sampling ball 301 out of the storage tube 204, and pushing the sampling ball 301 to a position farther away from the hexagonal rod 103, thereby realizing multi-point sampling at the same water depth position, avoiding the situation where the detection result of a single sampling is inaccurate.

[0029] An operating method of a water quality sampling monitoring device for environmental testing, the operating method comprising the following steps: Step A: First, select different numbers of sampling balls 301 according to the water depth to be detected. When connecting two or more sampling balls 301, first move the limiting plug plate 401 and the connecting ball 402 close to the inside of the hemispherical slot 307 at one end of one of the sampling balls 301. At this time, pull out the two movable latches 404 close to the position of the limiting plug plate 401, then insert the limiting plug plate 401 and the connecting ball 402 into the hemispherical slot 307, insert the clamping ring 405 into the clamping slot 308, and release the movable latch 404. At this time, the movable latch 404 will be ejected by the elastic potential energy of the compression spring 407 and clamped into the inside of the limiting slot 409, thereby fixing the limiting plug plate 401 and the connecting ball 40 2, and insert the connecting ball 402 connected by the connecting rod 403 and the limiting plug plate 401 into the hemispherical card slot 307 on the surface of another sampling ball 301 in the same way, so that two or more sampling balls 301 are connected to each other through the limiting plug plate 401 and the connecting ball 402, and then align the positioning groove 302 on the surface of the sampling ball 301 with the positioning rod 205, so that the positioning rod 205 is inserted into the positioning groove 302, so that the sampling ball 301 is installed in the storage tube 204 along the positioning rod 205, and then the sampling ball 301 closest to the connecting block 203 is connected to the connecting block 203 through the connecting ball 402, and the installation of the device is completed; Step B: The lifting ring 102 is hoisted by a lifting device to put the device into the water. When the device sinks to the specified sampling depth, the electric telescopic cylinder 202 is started to push the connecting block 203 downward, so that the connecting block 203 pushes the sampling ball 301 to move along the direction of the storage tube 204 and the positioning rod 205. At this time, the sampling ball 301 is pushed out of the storage tube 204 and pushed to a position close to the end of the positioning rod 205, thereby realizing multi-point sampling; Step C: After the device is put into water, the current water depth position is detected by the water depth sensor. When the personnel observe that it has reached the specified water depth position, the electric push rod 305 is started to drive the output end to push out, so that the sealing plate 303 is pushed out from the water inlet on the surface of the sampling ball 301, so that the sealing plate 303 no longer seals the water inlet. At this time, water will enter the interior of the sampling cavity 304 through the gap between the water inlet and the sealing plate 303, thereby completing the water sampling work, and then the electric push rod 305 is retracted to the output end, so that the sealing plate 303 touches the annular baffle 306, thereby sealing the water inlet again to prevent the sampled water from leaking out, and then the device is taken out of the water by the hoisting equipment, and the sampled water is taken out of the sampling ball 301, and the water quality sampling operation can be completed; Step D: When the device enters the water, the protective net 105 can be used to protect the device to prevent the bottom of the device from being hit and causing the sampling ball 301 to fall off, thereby affecting the sampling of water by the sampling ball 301. By setting the protective net 105, when the device is placed in the water, the protective net 105 will push the nearby water flow after entering the water, thereby scaring nearby fish and shrimps away from the detection location, preventing them from entering the interior of the sampling ball 301 and affecting the detection results of the sampled water quality.

[0030] When the water quality sampling monitoring device is used, different numbers of sampling balls 301 can be selected according to the water depth to be detected, and the sampling balls 301 can be installed inside the storage tube 204 along the positioning rod 205, so that the multiple sampling balls 301 are connected to each other through the limiting plug plate 401 and the connecting ball 402, and then the sampling ball 301 closest to the connecting block 203 is connected to the connecting block 203 through the connecting ball 402 to complete the installation of the device; Then, the lifting ring 102 is hoisted by the lifting equipment to put the device into the water. When the device sinks to the specified sampling depth, the electric telescopic cylinder 202 is started to push the connecting block 203 downward, so that the connecting block 203 pushes the sampling ball 301 to move along the direction of the storage tube 204 and the positioning rod 205. At this time, the sampling ball 301 is pushed out of the storage tube 204 and pushed to a position close to the end of the positioning rod 205, thereby realizing multi-point sampling; After the device is put into water, the current water depth position is detected by the water depth sensor. When the personnel observe that it has reached the specified water depth position, the electric push rod 305 is started to drive the output end to push out, so that the sealing plate 303 is pushed out from the water inlet on the surface of the sampling ball 301, so that the sealing plate 303 no longer seals the water inlet. At this time, water will enter the interior of the sampling cavity 304 through the gap between the water inlet and the sealing plate 303, thereby completing the water sampling work, and then the electric push rod 305 is retracted to the output end, so that the sealing plate 303 touches the annular baffle 306, thereby sealing the water inlet again to prevent the sampled water from leaking out, and then the device is taken out of the water by the hoisting equipment, and the sampled water is taken out of the sampling ball 301, and the water quality sampling operation can be completed; When the device enters the water, the protective net 105 can be used to protect the equipment to prevent the bottom of the device from being hit and causing the sampling ball 301 to fall off, thereby affecting the sampling of water by the sampling ball 301. Through the setting of the protective net 105, when the device is placed in the water, the protective net 105 will push the nearby water flow after entering the water, thereby scaring nearby fish and shrimps away from the detection location, preventing them from entering the interior of the sampling ball 301 and affecting the detection results of the sampled water quality.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A water quality sampling and monitoring device for environmental testing, comprising a protection mechanism (1), characterized in that: Six pushing mechanisms (2) are provided on the outer surface of the protection mechanism (1); a plurality of sampling mechanisms (3) are provided at the bottom end of the pushing mechanism (2); and surfaces of the sampling mechanisms (3) are all connected to connecting mechanisms (4); The sampling mechanism (3) comprises a sampling ball (301), a sealing plate (303), a sampling cavity (304) and an electric push rod (305); the sampling ball (301) is movably mounted below the pushing mechanism (2); a water inlet is provided on one side surface of the sampling ball (301); a sealing plate (303) is movably mounted inside the water inlet; a sampling cavity (304) is provided inside the sampling ball (301); an electric push rod (305) is fixedly mounted inside the sampling cavity (304); and an output end of the electric push rod (305) is fixedly connected to the surface of the sealing plate (303).

2. The water quality sampling and monitoring device for environmental testing according to claim 1 is characterized in that: The sampling mechanism (3) further comprises an annular baffle (306); the outer surface of the sampling ball (301) is provided with two positioning grooves (302); the outer surface of the sampling ball (301) is provided with two hemispherical clamping grooves (307); the axes of the two positioning grooves (302), the two hemispherical clamping grooves (307) and the sealing plate (303) are perpendicular to each other; the two positioning grooves (302) are symmetrically distributed; the two hemispherical clamping grooves (307) are symmetrically distributed; the outer surface of the sampling ball (301) is provided with a clamping groove (308) at a position close to the hemispherical clamping groove (307); and the inner wall of the electric push rod (305) is fixedly mounted with an annular baffle (306) at a position close to the water inlet.

3. The water quality sampling and monitoring device for environmental testing according to claim 2 is characterized in that: The protection mechanism (1) comprises a fixing frame (101), a lifting ring (102), a hexagonal rod (103), a connecting column (104) and a protection net (105); the lifting ring (102) is fixedly mounted on the top end of the fixing frame (101); the hexagonal rod (103) is fixedly mounted on the bottom end of the fixing frame (101); the connecting column (104) is fixedly mounted on the bottom end of the hexagonal rod (103); and the bottom end of the connecting column (104) is fixedly connected to the protection net (105).

4. The water quality sampling and monitoring device for environmental testing according to claim 3 is characterized in that: The pushing mechanism (2) comprises a waterproof box (201), an electric telescopic cylinder (202), a connecting block (203), a storage tube (204) and a positioning rod (205); six of the waterproof boxes (201) are respectively fixedly mounted on six outer surfaces of the hexagonal rod (103); the interior of each of the waterproof boxes (201) is fixedly mounted with an electric telescopic cylinder (202); the output end of each of the electric telescopic cylinders (202) is fixedly connected to a connecting block (203); the bottom end of each of the connecting blocks (203) is provided with a connecting bottom groove (206); and the waterproof box (201) is fixedly mounted on the outer surfaces of the six sides of the hexagonal rod (103). A storage cylinder (204) is provided below each of the connection blocks (201), and the storage cylinders (204) are fixedly connected to the six outer surfaces of the hexagonal rod (103). Positioning rods (205) are fixedly installed on both sides of the storage cylinder (204), and the bottom ends of the positioning rods (205) pass through the bottom ends of the storage cylinders (204) and extend in an arc shape to the bottom of the storage cylinder (204). The outer surfaces of the connection blocks (203) are provided with two connecting side grooves (207), and the positioning rods (205) are movably inserted into the inside of the connecting side grooves (207).

5. The water quality sampling and monitoring device for environmental testing according to claim 4 is characterized in that: The connection mechanism (4) comprises a limit plate (401), a connection ball (402), a connection rod (403) and a clamping ring (405); a limit plate (401) corresponding to the position of the hemispherical clamping groove (307) is movably mounted on the surface of the sampling ball (301); a clamping ring (405) is fixedly mounted on the surface of the limit plate (401); a connection ball (402) is movably mounted on the inner side of the limit plate (401); the outer surface of the limit plate (401) and the outer surface of the connection ball (402) are mutually fitted; and a connection rod (403) is fixedly connected between two adjacent connection balls (402).

6. The water quality sampling and monitoring device for environmental testing according to claim 5 is characterized in that: The connecting mechanism (4) further comprises a movable latch (404), a compression spring (407) and a limit plate (408); a movable latch (404) is movably mounted at a position on the outer surface of the sampling ball (301) close to the hemispherical slot (307); a spring groove (406) is provided inside the sampling ball (301) close to the movable latch (404); a limit plate (408) is fixedly mounted on the outer surface of the movable latch (404); the limit plate (408) is movably snapped into the inside of the spring groove (406); a compression spring (407) is movably mounted between the limit plate (408) and the inside of the spring groove (406); a limit groove (409) is provided on the surface of the clamping ring (405); and one end of the inner side of the movable latch (404) is movably snapped into the inside of the limit groove (409).

7. The water quality sampling and monitoring device for environmental testing according to claim 6 is characterized in that: The bottom end of the connecting block (203) is movably inserted into the top end of the storage tube (204), the six connecting balls (402) at the top are all movably snapped into the inside of the connecting bottom groove (206), the positioning rods (205) are all movably snapped into the inside of the positioning groove (302), and the sampling balls (301) are all movably snapped into the inside of the storage tube (204).

8. The water quality sampling and monitoring device for environmental testing according to claim 7 is characterized in that: The snap rings (405) are all movably snapped into the interior of the snap grooves (308), and the connecting balls (402) are all movably snapped into the interior of the hemispherical snap grooves (307).

9. The water quality sampling and monitoring device for environmental testing according to claim 8, characterized in that: A water depth sensor is provided on one surface of the hexagonal rod (103) at a position close to the bottom.

10. An operating method of the water quality sampling and monitoring device for environmental testing according to any one of claims 1 to 9, characterized in that: The operation method comprises the following steps: Step A: first, different numbers of sampling balls (301) are selected according to the water depth to be detected, and the sampling balls (301) are installed inside the storage tube (204) along the positioning rod (205), so that the plurality of sampling balls (301) are connected to each other through the limiting plug plate (401) and the connecting ball (402), and then the sampling ball (301) closest to the connecting block (203) is connected to the connecting block (203) through the connecting ball (402), thereby completing the installation of the device; Step B: The device is placed in water by hoisting the hoisting ring (102) with a hoisting device. When the device sinks to a specified sampling depth, the electric telescopic cylinder (202) is started to push the connecting block (203) downward, thereby causing the connecting block (203) to push the sampling ball (301) to move along the direction of the storage tube (204) and the positioning rod (205). At this time, the sampling ball (301) is pushed out of the storage tube (204) and pushed to a position close to the end of the positioning rod (205), thereby achieving multi-point sampling; Step C: After the device is placed in water, the current water depth position is detected by a water depth sensor. When the personnel observe that the device has reached the specified water depth position, the electric push rod (305) is started to drive the output end to be pushed out, so that the sealing plate (303) is pushed out from the water inlet on the surface of the sampling ball (301), so that the sealing plate (303) no longer seals the water inlet. At this time, water will enter the interior of the sampling cavity (304) through the gap between the water inlet and the sealing plate (303), thereby completing the water sampling work. Then, the electric push rod (305) is retracted to the output end, so that the sealing plate (303) touches the annular baffle (306), thereby sealing the water inlet again to prevent the sampled water from leaking out. Then, the device is taken out of the water by a hoisting device, and the sampled water is taken out of the sampling ball (301), and the water quality sampling operation is completed; Step D: When the device enters the water, the protective net (105) can be used to protect the device to prevent the bottom of the device from being hit and causing the sampling ball (301) to fall off, thereby affecting the sampling of water by the sampling ball (301). By setting the protective net (105), when the device is placed in the water, the protective net (105) will push the nearby water flow after entering the water, thereby scaring nearby fish and shrimps away from the detection location, thereby preventing them from entering the interior of the sampling ball (301) and affecting the detection result of the sampled water quality.

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