A multi-layer water sampling and detection device for testing polluted water sources

Abstract

The present invention discloses a multi-layer water sampling and detection device for contaminated water source inspection, belonging to the technical field of water source detection, including an extending mechanism for extending underwater. A shallow sampling mechanism for sampling shallow contaminated water and middle-layer contaminated water and a deep sampling mechanism for sampling deep contaminated water are arranged on the extending mechanism; the extending mechanism set by the present invention can place the inner layer, the middle layer and the fixed outer tube located on the outer layer into the water source, draw water from the shallow water source through the fixed outer tube, lower the middle layer tube into the middle layer water source, and lower the inner layer tube into the deep water source, so as to facilitate water sampling from each layer of water source, and the sampling is convenient; when the middle layer tube and the inner layer tube are lowered to the limit position, the middle docking block is docked with the outer closing piece, and the inner docking block contacts the middle closing piece, and the shallow sampling mechanism set by the present invention is automatically communicated with the middle layer water source and the shallow layer water source for water sampling, and the automation degree is high.

Description

Technical Field

[0001] The present invention relates to the technical field of water source detection, and particularly relates to a multi-layer water sampling and detection device for contaminated water source inspection. Background Art

[0002] The inspection of contaminated water sources usually requires the use of professional multi-layer water sampling and detection equipment. This kind of equipment is mainly used to sample from different water depth levels in order to understand the water quality conditions of different water layers, especially when there are multiple pollution sources or stratified water quality in the water source. This kind of equipment is used to sample at different water depth levels so as to be able to analyze the pollution degree of the water body at different levels and help identify the distribution of pollution sources. It is widely used in the monitoring of water source pollution in lakes, rivers, etc., especially in the case of obvious water quality levels and complex pollution source distributions. The multi-layer water sampling and detection equipment for contaminated water sources in the prior art usually cannot automatically draw water from multi-layer water sources, and the degree of automation is low. Summary of the Invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a multi-layer water sampling and detection device for contaminated water source inspection, including an extending mechanism for extending underwater. The extending mechanism includes a fixed outer tube. A shallow sampling mechanism for sampling shallow contaminated water and middle-layer contaminated water and a deep sampling mechanism for sampling deep contaminated water are arranged on the extending mechanism. The shallow sampling mechanism includes an outer closing piece slidably installed on the fixed outer tube, and the deep sampling mechanism includes a fixed disk.

[0004] The extending mechanism includes a middle-layer tube slidably installed in the fixed outer tube. An inner layer tube is slidably installed in the middle-layer tube. An inner docking plate is fixedly installed on the inner layer tube, and a middle docking plate is fixedly installed on the middle-layer tube.

[0005] The shallow sampling mechanism includes a middle closing piece slidably installed on the middle-layer tube. An inner docking block is slidably installed on the inner docking plate, and a middle docking block is slidably installed on the middle docking plate.

[0006] Further, the extending mechanism further includes a connecting tube fixedly installed on the fixed outer tube. A mounting plate is fixedly installed on the connecting tube. A water pump group and a detection box are arranged on the mounting plate. The water pump group is composed of three independent water pumps. Three independent detection instruments are arranged in the detection box. The water pumps and the detection instruments are connected through collection tubes. Inner layer extraction tubes, outer layer extraction tubes and middle layer extraction tubes are respectively fixedly installed on the three water pumps. The inner layer extraction tube is fixedly installed with the fixed disk. The outer layer extraction tube is fixedly installed and communicated with the inner docking plate. The middle layer extraction tube is fixedly installed and communicated with the middle docking plate.

[0007] Further, a winding rack is fixedly installed on the mounting plate. A middle-layer winding drum and an inner-layer winding drum are rotatably installed on the winding rack. A large gear is fixedly installed on the middle-layer winding drum, and a small gear is fixedly installed on the inner-layer winding drum. A winding motor is fixedly installed on the mounting plate, and a motor gear is fixedly installed on the motor shaft of the winding motor. The motor gear meshes with the large gear and also meshes with the small gear. An inner-layer rope is wound around the inner-layer winding drum, and the end of the inner-layer rope is fixedly installed with the inner-layer pipe. A middle-layer rope is wound around the middle-layer winding drum, and the end of the middle-layer rope is fixedly installed with the middle-layer pipe.

[0008] Further, two guiding racks are fixedly installed on the mounting plate. Two guiding wheels are rotatably installed on the guiding racks. The inner-layer rope and the middle-layer rope respectively pass between the guiding wheels of the two guiding racks.

[0009] During use, the mounting plate is placed on the ship or the shore. In the initial state, the middle-layer pipe and the inner-layer pipe are in the retracted state. The winding motor rotates to drive the motor gear to rotate, thereby driving the small gear and the inner-layer winding drum to rotate, and at the same time driving the large gear and the middle-layer winding drum to rotate. The rotation of the middle-layer winding drum releases the middle-layer pipe through the middle-layer rope, and the rotation of the inner-layer winding drum releases the inner-layer pipe through the inner-layer rope. The middle-layer pipe and the inner-layer pipe descend under the action of gravity. The middle-layer pipe slides downward along the fixed outer pipe, and the inner-layer pipe slides downward along the middle-layer pipe. When the middle-layer pipe descends to the limit position, the inner-layer pipe continues to descend. At this time, the middle-layer rope is continuously released, but the middle-layer pipe will not continue to descend. When the middle-layer pipe and the inner-layer pipe have completed their descent, the middle convex platform contacts the outer retaining platform, and the inner convex platform contacts the middle retaining platform. When the inner-layer rope and the middle-layer rope are released, they are guided by the guiding wheels.

[0010] Further, the shallow retrieval mechanism further includes a middle convex platform provided on the middle-layer pipe, an outer retaining platform provided inside the fixed outer pipe, an inner convex platform provided on the inner-layer pipe, and a middle retaining platform provided inside the middle-layer pipe.

[0011] Further, a middle closing spring is provided between the middle closing piece and the middle-layer pipe, and an outer closing spring is provided between the outer closing piece and the fixed outer pipe.

[0012] Further, liquid inlet grooves are provided on both the outer closing piece and the middle closing piece.

[0013] Further, a middle water inlet hole is provided on the middle docking block, an inner water inlet hole is provided on the inner docking block. A middle docking spring is provided between the middle docking block and the middle docking plate, and an inner docking spring is provided between the inner docking block and the inner docking plate. The elastic force of the middle docking spring is greater than the elastic force of the outer closing spring, and the elastic force of the inner docking spring is greater than the elastic force of the middle closing spring. Rounded corners are provided on the middle docking block and the inner docking block.

[0014] When the middle boss contacts the outer retaining boss, the inner boss contacts the middle retaining boss. At this time, the middle docking block reaches the inner side of the outer closing piece, and the inner docking block reaches the inner side of the middle closing piece. At this time, the middle docking spring and the inner docking spring that were originally in a compressed state rebound, causing the middle docking block and the inner docking block to pop out. The middle docking block pushes the outer closing piece to slide outward, and the outer closing spring is stretched. At this time, the shallow water enters the middle water inlet hole through the liquid inlet groove on the back of the outer closing piece and finally enters the outer extraction pipe. At the same time, the inner docking block pushes the middle closing piece to slide outward, and the middle closing spring is stretched. The middle layer of water enters the inner water inlet hole through the liquid inlet groove on the back of the middle closing piece and finally enters the middle extraction pipe. The water pump group pumps the shallow water and the middle layer of water into the detection box through the outer extraction pipe and the middle extraction pipe respectively for detection.

[0015] After the pumping is completed, the winding motor drives the inner winding drum and the middle winding drum to rotate, winding the middle rope and the inner rope. The middle docking block and the inner docking block are pushed inward by the inner walls of the fixed outer pipe and the middle pipe through the rounded corners, causing the middle docking spring and the inner docking spring to be compressed, and the outer closing spring and the middle closing spring to rebound, causing the outer closing piece and the middle closing piece to be closed again.

[0016] Further, the deep water extraction mechanism includes a sleeve fixedly installed on the fixed disk. A cylinder is fixedly installed on the sleeve. A pressure rod is slidably installed in the sleeve. The pressure rod is slidably installed with the fixed disk. An inner frame is fixedly installed in the inner layer pipe. An inner closing piece is slidably installed at the bottom of the inner layer pipe. The inner closing piece is fixedly installed with the pressure rod. An inner closing spring is provided between the pressure rod and the inner frame.

[0017] When the inner layer pipe has completely dropped, the cylinder extends, pushing the pressure rod and the inner closing piece to slide outward, and the inner closing spring is compressed. At this time, the deep water enters the inner layer pipe, and the water pump group pumps the deep water into the detection box through the inner extraction pipe for detection.

[0018] The beneficial effects of the present invention compared with the prior art are as follows: (1) The insertion mechanism provided by the present invention can place the inner layer, the middle layer, and the fixed outer pipe located in the outer layer into the water source. The fixed outer pipe is used to draw water from the shallow water source, the middle layer pipe is lowered into the middle layer water source, and the inner layer pipe is lowered into the deep water source, so as to facilitate water extraction from each layer of water source and make sampling convenient; (2) When the middle layer pipe and the inner layer pipe are lowered to the limit position, the middle docking block docks with the outer closing piece, and the inner docking block contacts the middle closing piece. The shallow water extraction mechanism provided by the present invention automatically communicates with the middle layer water source and the shallow water source for water extraction, with high automation; (3) When the inner layer pipe is lowered to the bottommost part, the deep water extraction mechanism is activated. At this time, the water pump group simultaneously pumps out multiple layers of water for detection, with high sampling and detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 Schematic diagram of the extending mechanism of the present invention Figure 1 。

[0021] Figure 3 Schematic diagram of the extending mechanism of the present invention Figure 2 。

[0022] Figure 4 Schematic diagram of the extending mechanism of the present invention Figure 3 。

[0023] Figure 5 Schematic diagram of the shallow picking mechanism of the present invention Figure 1 。

[0024] Figure 6 Schematic diagram of the shallow picking mechanism of the present invention Figure 2 。

[0025] Figure 7 is Figure 6 Partial enlarged schematic diagram at position A in

[0026] Figure 8 is Figure 6 Partial enlarged schematic diagram at position B in

[0027] Figure 9 Schematic diagram of the liquid inlet tank of the present invention

[0028] Figure 10 Schematic diagram of the shallow picking mechanism of the present invention Figure 3 。

[0029] Figure 11 is Figure 10 Partial enlarged schematic diagram at position C in

[0030] Figure 12 is Figure 10 Partial enlarged schematic diagram at position D in

[0031] Figure 13 Schematic diagram of the shallow picking mechanism of the present invention Figure 4 。

[0032] Figure 14 Schematic diagram of the deep picking mechanism of the present invention

[0033] Attached drawing reference numerals: 101 - fixed outer tube; 102 - middle layer tube; 103 - inner layer tube; 104 - connecting tube; 105 - inner docking plate; 106 - middle docking plate; 107 - mounting plate; 108 - detection box; 109 - collecting tube; 110 - water pump group; 111 - winding frame; 112 - guiding frame; 113 - winding motor; 114 - motor gear; 115 - middle layer winding drum; 116 - large gear; 117 - inner layer winding drum; 118 - small gear; 119 - guiding wheel; 120 - middle layer rope; 121 - inner layer rope; 122 - inner layer extraction tube; 123 - outer layer extraction tube; 124 - middle layer extraction tube; 201 - outer closing piece; 202 - middle convex platform; 203 - outer retaining platform; 204 - outer closing spring; 205 - liquid inlet groove; 206 - inner convex platform; 207 - middle retaining platform; 208 - middle closing piece; 209 - middle closing spring; 210 - middle docking block; 211 - middle docking spring; 212 - inner docking block; 213 - inner docking spring; 214 - middle water inlet hole; 215 - inner water inlet hole; 301 - fixed disk; 302 - sleeve; 303 - cylinder; 304 - pressing rod; 305 - inner closing spring; 306 - inner closing piece; 307 - inner frame. Detailed implementation manners

[0034] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings.

[0035] Embodiment: Refer to Figures 1 - 14 , a multi - layer water sampling and detection device for contaminated water source inspection, including an extending mechanism for extending underwater. The extending mechanism includes a fixed outer tube 101. A shallow sampling mechanism for sampling shallow - layer contaminated water and middle - layer contaminated water and a deep sampling mechanism for sampling deep - layer contaminated water are provided on the extending mechanism. The shallow sampling mechanism includes an outer closing piece 201 slidably mounted on the fixed outer tube 101, and the deep sampling mechanism includes a fixed disk 301;

[0036] The extending mechanism includes a middle layer tube 102 slidably mounted in the fixed outer tube 101. An inner layer tube 103 is slidably mounted in the middle layer tube 102. An inner docking plate 105 is fixedly mounted on the inner layer tube 103, and a middle docking plate 106 is fixedly mounted on the middle layer tube 102;

[0037] The shallow sampling mechanism includes a middle closing piece 208 slidably mounted on the middle layer tube 102. An inner docking block 212 is slidably mounted on the inner docking plate 105, and a middle docking block 210 is slidably mounted on the middle docking plate 106.

[0038] As Figures 2 - 4As shown, the insertion mechanism further includes a connecting pipe 104 fixedly installed on the fixed outer pipe 101. An installation plate 107 is fixedly installed on the connecting pipe 104. A water pump group 110 and a detection box 108 are arranged on the installation plate 107. The water pump group 110 consists of three independent water pumps. Three independent detection instruments are arranged in the detection box 108. The water pumps and the detection instruments are connected through a collection pipe 109. Inner layer extraction pipes 122, outer layer extraction pipes 123, and middle layer extraction pipes 124 are respectively and fixedly installed on the three water pumps. The inner layer extraction pipe 122 is fixedly installed with the fixed disk 301. The outer layer extraction pipe 123 is fixedly installed and communicated with the inner docking plate 105. The middle layer extraction pipe 124 is fixedly installed and communicated with the middle docking plate 106.

[0039] As Figures 2 - 4 As shown, a winding frame 111 is fixedly installed on the installation plate 107. A middle layer winding drum 115 and an inner layer winding drum 117 are rotatably installed on the winding frame 111. A large gear 116 is fixedly installed on the middle layer winding drum 115. A small gear 118 is fixedly installed on the inner layer winding drum 117. A winding motor 113 is fixedly installed on the installation plate 107. A motor gear 114 is fixedly installed on the motor shaft of the winding motor 113. The motor gear 114 meshes with the large gear 116, and the motor gear 114 meshes with the small gear 118. An inner layer rope 121 is wound around the inner layer winding drum 117. The end of the inner layer rope 121 is fixedly installed with the inner layer pipe 103. A middle layer rope 120 is wound around the middle layer winding drum 115. The end of the middle layer rope 120 is fixedly installed with the middle layer pipe 102.

[0040] As Figures 2 - 4 As shown, two guiding frames 112 are fixedly installed on the installation plate 107. Two guiding wheels 119 are rotatably installed on the guiding frames 112. The inner layer rope 121 and the middle layer rope 120 respectively pass through between the guiding wheels 119 of the two guiding frames 112.

[0041] When in use, the mounting plate 107 is placed on the ship or the shore. In the initial state, the middle layer pipe 102 and the inner layer pipe 103 are in the retracted state. The winding motor 113 rotates to drive the motor gear 114 to rotate, thereby driving the small gear 118 and the inner layer winding drum 117 to rotate. At the same time, it drives the large gear 116 and the middle layer winding drum 115 to rotate. The rotation speed of the inner layer winding drum 117 is twice that of the middle layer winding drum 115. The rotation of the middle layer winding drum 115 releases the middle layer pipe 102 through the middle layer rope 120, and the rotation of the inner layer winding drum 117 releases the inner layer pipe 103 through the inner layer rope 121. The middle layer pipe 102 and the inner layer pipe 103 descend under the action of gravity. The middle layer pipe 102 slides down along the fixed outer pipe 101, and the inner layer pipe 103 slides down along the middle layer pipe 102. After the middle layer pipe 102 descends to the limit position, the inner layer pipe 103 continues to descend. At this time, the middle layer rope 120 is continuously released, but the middle layer pipe 102 will not continue to descend. When the middle layer pipe 102 and the inner layer pipe 103 finish descending, the middle convex platform 202 contacts the outer retaining platform 203, and the inner convex platform 206 contacts the middle retaining platform 207. When the inner layer rope 121 and the middle layer rope 120 are released, they are guided by the guide wheel 119.

[0042] As Figures 5 - 13 shown, the shallow extraction mechanism further includes a middle convex platform 202 provided on the middle layer pipe 102, an outer retaining platform 203 provided inside the fixed outer pipe 101, an inner convex platform 206 provided on the inner layer pipe 103, and a middle retaining platform 207 provided inside the middle layer pipe 102.

[0043] As Figures 5 - 13 shown, a middle closing spring 209 is provided between the middle closing piece 208 and the middle layer pipe 102, and an outer closing spring 204 is provided between the outer closing piece 201 and the fixed outer pipe 101.

[0044] As Figures 5 - 13 shown, liquid inlet grooves 205 are provided on both the outer closing piece 201 and the middle closing piece 208.

[0045] As Figures 5 - 13 shown, a middle water inlet hole 214 is provided on the middle docking block 210, an inner water inlet hole 215 is provided on the inner docking block 212. A middle docking spring 211 is provided between the middle docking block 210 and the middle docking plate 106, and an inner docking spring 213 is provided between the inner docking block 212 and the inner docking plate 105. The elastic force of the middle docking spring 211 is greater than the elastic force of the outer closing spring 204, and the elastic force of the inner docking spring 213 is greater than the elastic force of the middle closing spring 209. The middle docking block 210 and the inner docking block 212 are provided with rounded corners.

[0046] When the middle boss 202 contacts the outer retaining boss 203, the inner boss 206 contacts the middle retaining boss 207. At this time, the middle docking block 210 reaches the inside of the outer closing piece 201, and the inner docking block 212 reaches the inside of the middle closing piece 208. At this time, the middle docking spring 211 and the inner docking spring 213 that were originally in a compressed state rebound, causing the middle docking block 210 and the inner docking block 212 to pop out. The middle docking block 210 pushes the outer closing piece 201 to slide outward, and the outer closing spring 204 is stretched. At this time, the shallow water enters the middle water inlet hole 214 through the liquid inlet groove 205 on the back of the outer closing piece 201 and finally enters the outer layer pumping pipe 123. At the same time, the inner docking block 212 pushes the middle closing piece 208 to slide outward, and the middle closing spring 209 is stretched. The middle layer water enters the inner water inlet hole 215 through the liquid inlet groove 205 on the back of the middle closing piece 208 and finally enters the middle layer pumping pipe 124. The water pump group 110 pumps the shallow water and the middle layer water into the detection box 108 through the outer layer pumping pipe 123 and the middle layer pumping pipe 124 respectively through the collection pipe 109 for detection.

[0047] After the water pumping is completed, the winding motor 113 drives the inner layer winding drum 117 and the middle layer winding drum 115 to rotate, winding the middle layer rope 120 and the inner layer rope 121. The middle docking block 210 and the inner docking block 212 are pushed inward by the inner walls of the fixed outer pipe 101 and the middle layer pipe 102 through the rounded corners, causing the middle docking spring 211 and the inner docking spring 213 to be compressed, and the outer closing spring 204 and the middle closing spring 209 to rebound, causing the outer closing piece 201 and the middle closing piece 208 to be closed again.

[0048] As Figure 14 shown, the deep water extraction mechanism includes a sleeve 302 fixedly installed on the fixed disk 301. A cylinder 303 is fixedly installed on the sleeve 302. A pressure rod 304 is slidably installed in the sleeve 302. The pressure rod 304 is slidably installed with the fixed disk 301. An inner frame 307 is fixedly installed in the inner layer pipe 103. An inner closing piece 306 is slidably installed at the bottom of the inner layer pipe 103. The inner closing piece 306 is fixedly installed with the pressure rod 304. An inner closing spring 305 is arranged between the pressure rod 304 and the inner frame 307.

[0049] When the inner layer pipe 103 completely drops, the cylinder 303 extends, pushing the pressure rod 304 and the inner closing piece 306 to slide outward, and the inner closing spring 305 is compressed. At this time, the deep water enters the inner layer pipe 103, and the water pump group 110 pumps the deep water into the detection box 108 through the inner layer pumping pipe 122 through the collection pipe 109 for detection.

[0050] The working principle of a multi-layer water sampling and detection device for contaminated water source inspection disclosed by the present invention is as follows: When in use, the mounting plate 107 is placed on a ship or the shore. In the initial state, the middle layer pipe 102 and the inner layer pipe 103 are in a retracted state. The winding motor 113 rotates to drive the motor gear 114 to rotate, thereby driving the small gear 118 and the inner layer winding drum 117 to rotate, and at the same time driving the large gear 116 and the middle layer winding drum 115 to rotate. The rotation speed of the inner layer winding drum 117 is twice that of the middle layer winding drum 115. The rotation of the middle layer winding drum 115 releases the middle layer pipe 102 through the middle layer rope 120, and the rotation of the inner layer winding drum 117 releases the inner layer pipe 103 through the inner layer rope 121. The middle layer pipe 102 and the inner layer pipe 103 descend under the action of gravity. The middle layer pipe 102 slides downward along the fixed outer pipe 101, and the inner layer pipe 103 slides downward along the middle layer pipe 102. After the middle layer pipe 102 descends to the limit position, the inner layer pipe 103 continues to descend. At this time, the middle layer rope 120 is continuously released, but the middle layer pipe 102 will not continue to descend. When the middle layer pipe 102 and the inner layer pipe 103 finish descending, the middle convex platform 202 contacts the outer retaining platform 203, and the inner convex platform 206 contacts the middle retaining platform 207. When the inner layer rope 121 and the middle layer rope 120 are released, they are guided by the guide wheel 119. When the middle convex platform 202 contacts the outer retaining platform 203, the inner convex platform 206 contacts the middle retaining platform 207. At this time, the middle docking block 210 reaches the inside of the outer closing piece 201, and the inner docking block 212 reaches the inside of the middle closing piece 208. At this time, the middle docking spring 211 and the inner docking spring 213 that were originally in a compressed state rebound, causing the middle docking block 210 and the inner docking block 212 to pop out. The middle docking block 210 pushes the outer closing piece 201 to slide outward, and the outer closing spring 204 is stretched. At this time, the shallow water enters the middle water inlet hole 214 through the liquid inlet groove 205 on the back of the outer closing piece 201, and finally enters the outer layer extraction pipe 123. At the same time, the inner docking block 212 pushes the middle closing piece 208 to slide outward, and the middle closing spring 209 is stretched. The middle layer water enters the inner water inlet hole 215 through the liquid inlet groove 205 on the back of the middle closing piece 208, and finally enters the middle layer extraction pipe 124. When the inner layer pipe 103 completely drops, the air cylinder 303 extends, pushing the pressure rod 304 and the inner closing piece 306 to slide outward, and the inner closing spring 305 is compressed. At this time, the deep water enters the inner layer pipe 103. The water pump group 110 pumps the deep water, shallow water, and middle layer water into the detection box 108 through the inner layer extraction pipe 122, the outer layer extraction pipe 123, and the middle layer extraction pipe 124 respectively through the collection pipe 109 for detection.After the pumping is completed, the winding motor 113 drives the inner winding drum 117 and the middle winding drum 115 to rotate, winding the middle rope 120 and the inner rope 121. The middle docking block 210 and the inner docking block 212 are pushed inward by the inner walls of the outer tube 101 and the middle tube 102 through the rounded corners, so that the middle docking spring 211 and the inner docking spring 213 are compressed, and the outer closing spring 204 and the middle closing spring 209 rebound, causing the outer closing piece 201 and the middle closing piece 208 to close again. The cylinder 303 retracts, and the inner closing spring 305 rebounds, causing the inner closing piece 306 to close the bottom of the inner tube 103 again. Finally, the middle tube 102 and the inner tube 103 are wound to the uppermost position.

[0051] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope of the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A multi-layer water sampling and detection device for testing polluted water sources, including an extending mechanism for extending underwater, characterized in that: The extending mechanism includes a fixed outer tube (101). A shallow sampling mechanism for sampling shallow contaminated water and middle-layer contaminated water and a deep sampling mechanism for sampling deep contaminated water are provided on the extending mechanism. The shallow sampling mechanism includes an outer closing piece (201) slidably mounted on the fixed outer tube (101). The deep sampling mechanism includes a fixed disk (301). The extending mechanism includes a middle-layer tube (102) slidably mounted inside the fixed outer tube (101). An inner layer tube (103) is slidably mounted inside the middle-layer tube (102). An inner docking plate (105) is fixedly mounted on the inner layer tube (103), and a middle docking plate (106) is fixedly mounted on the middle-layer tube (102). The extending mechanism further includes a connecting tube (104) fixedly mounted on the fixed outer tube (101). A mounting plate (107) is fixedly mounted on the connecting tube (104). A winding frame (111) is fixedly mounted on the mounting plate (107). A middle-layer winding drum (115) and an inner-layer winding drum (117) are rotatably mounted on the winding frame (111). A large gear (116) is fixedly mounted on the middle-layer winding drum (115), and a small gear (118) is fixedly mounted on the inner-layer winding drum (117). A winding motor (113) is fixedly mounted on the mounting plate (107). A motor gear (114) is fixedly mounted on the motor shaft of the winding motor (113). The motor gear (114) meshes with the large gear (116), and the motor gear (114) meshes with the small gear (118). The shallow sampling mechanism includes a middle closing piece (208) slidably mounted on the middle-layer tube (102). An inner docking block (212) is slidably mounted on the inner docking plate (105), and a middle docking block (210) is slidably mounted on the middle docking plate (106). A middle closing spring (209) is provided between the middle closing piece (208) and the middle-layer tube (102), and an outer closing spring (204) is provided between the outer closing piece (201) and the fixed outer tube (101). Liquid inlet grooves (205) are provided on both the outer closing piece (201) and the middle closing piece (208). A middle water inlet hole (214) is provided on the middle docking block (210), and an inner water inlet hole (215) is provided on the inner docking block (212). A middle docking spring (211) is provided between the middle docking block (210) and the middle docking plate (106), and an inner docking spring (213) is provided between the inner docking block (212) and the inner docking plate (105). The elastic force of the middle docking spring (211) is greater than the elastic force of the outer closing spring (204), and the elastic force of the inner docking spring (213) is greater than the elastic force of the middle closing spring (209). Rounded corners are provided on the middle docking block (210) and the inner docking block (212).

2. The multi-layer water sampling and detection device for contaminated water source inspection according to claim 1, wherein: A water pump group (110) and a detection box (108) are arranged on the mounting plate (107). The water pump group (110) consists of three independent water pumps. Three independent water quality analyzers are arranged in the detection box (108). The water pumps are connected to the water quality analyzers through collection pipes (109). Inner layer extraction pipes (122), outer layer extraction pipes (123) and middle layer extraction pipes (124) are fixedly installed on the three water pumps respectively. The inner layer extraction pipe (122) is fixedly installed with the fixed disk (301). The outer layer extraction pipe (123) is fixedly installed and communicated with the inner docking plate (105). The middle layer extraction pipe (124) is fixedly installed and communicated with the middle docking plate (106).

3. The multi-layer water sampling and detection device for contaminated water source inspection according to claim 2, characterized in that: An inner layer rope (121) is wound on the inner layer winding drum (117). The end of the inner layer rope (121) is fixedly installed with the inner layer pipe (103). A middle layer rope (120) is wound on the middle layer winding drum (115). The end of the middle layer rope (120) is fixedly installed with the middle layer pipe (102).

4. The multi-layer water sampling and detection device for contaminated water source inspection according to claim 3, characterized in that: Two guide frames (112) are fixedly installed on the mounting plate (107). Two guide wheels (119) are rotatably installed on the guide frames (112). The inner layer rope (121) and the middle layer rope (120) respectively pass between the guide wheels (119) of the two guide frames (112).

5. A multi-layer water sampling and detection device for testing polluted water sources according to claim 1, characterized in that: The shallow extraction mechanism further includes a middle convex platform (202) arranged on the middle layer pipe (102). An outer retaining platform (203) is arranged in the fixed outer pipe (101). An inner convex platform (206) is arranged on the inner layer pipe (103). A middle retaining platform (207) is arranged in the middle layer pipe (102).

6. A multi-layer water sampling and detection device for contaminated water source inspection according to claim 1, characterized in that: The deep extraction mechanism includes a sleeve (302) fixedly installed on the fixed disk (301). A cylinder (303) is fixedly installed on the sleeve (302). A pressure rod (304) is slidably installed in the sleeve (302). The pressure rod (304) is slidably installed with the fixed disk (301). An inner frame (307) is fixedly installed in the inner layer pipe (103). An inner closing piece (306) is slidably installed at the bottom of the inner layer pipe (103). The inner closing piece (306) is fixedly installed with the pressure rod (304). An inner closing spring (305) is arranged between the pressure rod (304) and the inner frame (307).

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