Multi-layer water sampling and detecting equipment for detecting polluted water source

Abstract

The invention discloses a multi-layer water sampling and detecting device for detecting a polluted water source, and belongs to the technical field of water source detection, the multi-layer water sampling and detecting device comprises a stretching mechanism for stretching into water, and the stretching mechanism is provided with a shallow sampling mechanism for sampling shallow polluted water and middle polluted water and a deep sampling mechanism for sampling deep polluted water; by means of the stretching mechanism, the inner layer, the middle layer and the fixed outer pipe located on the outer layer can be put into a water source, water is taken from the shallow water source through the fixed outer pipe, the middle layer pipe descends into the middle layer water source, the inner layer pipe descends into the deep layer water source, and therefore water can be taken from all the layers of water sources conveniently, and sampling is convenient; according to the shallow taking mechanism, when the middle-layer pipe and the inner-layer pipe descend to limit positions, a middle butt joint block is in butt joint with an outer sealing piece, an inner butt joint block makes contact with a middle sealing piece, the shallow taking mechanism is automatically communicated with a middle-layer water source and a shallow-layer water source, water taking is conducted, and the automation degree is high.

Description

Technical Field

[0001] The invention relates to the technical field of water source detection, in particular to a multi-layer water sampling and detection device for detecting polluted water sources. Background Art

[0002] The inspection of polluted water sources usually requires the use of professional multi-layer water sampling and testing equipment. This equipment is mainly used to take samples from different water depths in order to understand the water quality of different water layers, especially when there are multiple pollution sources or stratified water quality in the water source. This equipment is used to take samples at different water depths so that the degree of pollution of the water body at different levels can be analyzed to help identify the distribution of pollution sources. It is widely used in the monitoring of water pollution such as lakes and rivers, especially when the water quality levels are obvious and the distribution of pollution sources is complex. The multi-layer water sampling and testing equipment for polluted water sources in the prior art is usually unable to automatically take water from multi-layer water sources and has a low degree of automation. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is as follows: a multi-layer water sampling and detection device for testing polluted water sources, comprising an insertion mechanism for inserting into water, the insertion mechanism comprising a fixed outer tube, the insertion mechanism being provided with a shallow sampling mechanism for sampling shallow polluted water and middle polluted water and a deep sampling mechanism for sampling deep polluted water, the shallow sampling mechanism comprising an outer sealing sheet slidably mounted on the fixed outer tube, and the deep sampling mechanism comprising a fixed disk; The insertion mechanism comprises a middle tube slidably mounted in a fixed outer tube, an inner tube slidably mounted in the inner tube, an inner butt plate fixedly mounted on the inner tube, and a middle butt plate fixedly mounted on the middle tube; The shallow extraction mechanism comprises a middle closing plate slidably mounted on the middle layer pipe, an inner docking block slidably mounted on the inner docking plate, and a middle docking block slidably mounted on the middle docking plate.

[0004] Furthermore, the insertion mechanism also includes a connecting pipe fixedly mounted on the fixed outer pipe, a mounting plate fixedly mounted on the connecting pipe, a water pump group and a detection box are arranged on the mounting plate, the water pump group consists of three independent water pumps, three independent detection instruments are arranged in the detection box, the water pump and the detection instrument are connected through a collecting pipe, and an inner layer pumping pipe, an outer layer pumping pipe and a middle layer pumping pipe are respectively fixedly mounted on the three water pumps, the inner layer pumping pipe is fixedly mounted on the fixed plate, the outer layer pumping pipe is fixedly mounted and connected to the inner docking plate, and the middle layer pumping pipe is fixedly mounted and connected to the middle docking plate.

[0005] Furthermore, a winding frame is fixedly installed on the mounting plate, and a middle-layer winding drum and an inner-layer winding drum are rotatably installed on the winding frame, 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, a motor gear is fixedly installed on the motor shaft of the winding motor, the motor gear is meshed with the large gear, and the motor gear is meshed 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 tube, 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 tube.

[0006] Furthermore, two guide frames are fixedly mounted on the mounting plate, two guide wheels are rotatably mounted on the guide frames, and the inner layer rope and the middle layer rope pass through between the guide wheels of the two guide frames respectively.

[0007] When in use, the mounting plate is placed on a ship or on the shore. In the initial state, the middle tube and the inner tube are in a retracted state, and the rotation of the reeling motor drives the motor gear to rotate, thereby driving the small gear and the inner reel to rotate, and at the same time driving the large gear and the middle reel to rotate, the middle reel rotates to release the middle tube through the middle rope, and the inner reel rotates to release the inner tube through the inner rope, and the middle tube and the inner tube descend under the action of gravity, and the middle tube slides downward along the fixed outer tube, and the inner tube slides downward along the middle tube. After the middle tube descends to the limit position, the inner tube continues to descend, and at this time the middle rope is continuously released, but the middle tube does not continue to descend, and when the middle tube and the inner tube are completely lowered, the middle boss contacts the outer stopper, and the inner boss contacts the middle stopper, and when the inner rope and the middle rope are released, they are guided by the guide wheel.

[0008] Furthermore, the shallow extraction mechanism also includes a middle boss arranged on the middle tube, an outer stopper is arranged in the fixed outer tube, an inner boss is arranged on the inner tube, and a middle stopper is arranged in the middle tube.

[0009] Furthermore, a middle closing spring is arranged between the middle closing piece and the middle tube, and an outer closing spring is arranged between the outer closing piece and the fixed outer tube.

[0010] Furthermore, the outer closing piece and the middle closing piece are both provided with liquid inlet grooves.

[0011] Furthermore, 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, 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 closed spring, the elastic force of the inner docking spring is greater than the elastic force of the middle closed spring, and rounded corners are provided on the middle docking block and the inner docking block.

[0012] When the middle boss contacts the outer retaining platform, the inner boss contacts the middle retaining platform. 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 outwards, 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 outwards, the middle closing spring is stretched, and the middle layer 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 water into the detection box through the outer extraction pipe and the middle extraction pipe respectively for detection.

[0013] 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 inwards 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.

[0014] 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 arranged between the pressure rod and the inner frame.

[0015] When the inner layer pipe has completely dropped, the cylinder extends, pushing the pressure rod and the inner closing piece to slide outwards, 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.

[0016] 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 convenient sampling; (2) When the middle layer pipe and the inner layer pipe 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. The shallow water extraction mechanism provided by the present invention is automatically connected to 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

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 Schematic diagram of the insertion mechanism structure of the present invention Figure 1 .

[0019] Figure 3 Schematic diagram of the insertion mechanism structure of the present invention Figure 2 .

[0020] Figure 4 Schematic diagram of the insertion mechanism structure of the present invention Figure 3 .

[0021] Figure 5 The present invention is briefly shown in the structure diagram Figure 1 .

[0022] Figure 6 The present invention is briefly shown in the structure diagram Figure 2 .

[0023] Figure 7 for Figure 6 A local enlarged schematic diagram of point A in the middle.

[0024] Figure 8 for Figure 6 A local enlarged schematic diagram of point B in the middle.

[0025] Fig. 9 It is a schematic diagram of the structure of the liquid inlet tank of the present invention.

[0026] Fig.10 The present invention is briefly shown in the structure diagram Figure 3 .

[0027] Fig.11 for Fig.10 A partial enlarged schematic diagram of point C in the middle.

[0028] Fig.12 for Fig.10 A partial enlarged schematic diagram of point D in the middle.

[0029] Fig.13 The present invention is briefly shown in the structure diagram Figure 4 .

[0030] Fig.14 It is a schematic diagram of the structure of the deep extraction mechanism of the present invention.

[0031] Figure numbers: 101-fixed outer tube; 102-middle tube; 103-inner tube; 104-connecting tube; 105-inner docking plate; 106-middle docking plate; 107-installation plate; 108-detection box; 109-collection tube; 110-water pump group; 111-winding frame; 112-guide frame; 113-winding motor; 114-motor gear; 115-middle winding drum; 116-large gear; 117-inner winding drum; 118-small gear; 119-guide wheel; 120-middle rope; 121-inner rope; 122-inner pumping tube; 123-outer pumping tube ;124-middle layer suction tube;201-outer closing piece;202-middle boss;203-outer baffle;204-outer closing spring;205-liquid inlet groove;206-inner boss;207-middle baffle;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 plate;302-sleeve;303-cylinder;304-pressure rod;305-inner closing spring;306-inner closing piece;307-inner frame. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] Example: Reference Figure 1-Figure 14 A multi-layer water sampling and detection device for testing a polluted water source, comprising an insertion mechanism for inserting into water, the insertion mechanism comprising a fixed outer tube 101, a shallow sampling mechanism for sampling shallow polluted water and middle polluted water and a deep sampling mechanism for sampling deep polluted water are arranged on the insertion mechanism, the shallow sampling mechanism comprises an outer sealing sheet 201 slidably mounted on the fixed outer tube 101, and the deep sampling mechanism comprises a fixed disk 301; The insertion mechanism includes a middle tube 102 slidably mounted in a fixed outer tube 101, an inner tube 103 slidably mounted in an inner tube 103, an inner docking plate 105 fixedly mounted on the inner tube 103, and a middle docking plate 106 fixedly mounted on the middle tube 102; The shallow extraction mechanism comprises a middle closing plate 208 slidably mounted on the middle tube 102 , an inner docking block 212 slidably mounted on the inner docking plate 105 , and a middle docking block 210 slidably mounted on the middle docking plate 106 .

[0034] like Figure 2-Figure 4As shown, the insertion mechanism also includes a connecting pipe 104 fixedly mounted on the fixed outer pipe 101, a mounting plate 107 fixedly mounted on the connecting pipe 104, a water pump group 110 and a detection box 108 are arranged on the mounting plate 107, the water pump group 110 is composed of three independent water pumps, three independent detection instruments are arranged in the detection box 108, the water pump and the detection instrument are connected through a collecting pipe 109, an inner layer pumping pipe 122, an outer layer pumping pipe 123 and a middle layer pumping pipe 124 are respectively fixedly mounted on the three water pumps, the inner layer pumping pipe 122 is fixedly mounted on the fixed plate 301, the outer layer pumping pipe 123 is fixedly mounted and connected to the inner docking plate 105, and the middle layer pumping pipe 124 is fixedly mounted and connected to the middle docking plate 106.

[0035] like Figure 2-Figure 4 As shown, a winding frame 111 is fixedly mounted on the mounting plate 107, and 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 is meshed with the large gear 116, and the motor gear 114 is meshed with the small gear 118, an inner-layer rope 121 is wound around the inner-layer winding drum 117, and the end of the inner-layer rope 121 is fixedly mounted to the inner-layer tube 103, a middle-layer rope 120 is wound around the middle-layer winding drum 115, and the end of the middle-layer rope 120 is fixedly mounted to the middle-layer tube 102.

[0036] like Figure 2-Figure 4 As shown, two guide frames 112 are fixedly mounted on the mounting plate 107 , and two guide wheels 119 are rotatably mounted on the guide frames 112 . The inner layer rope 121 and the middle layer rope 120 pass through between the guide wheels 119 of the two guide frames 112 , respectively.

[0037] When in use, the mounting plate 107 is placed on a ship or on the shore. In the initial state, the middle tube 102 and the inner tube 103 are in a retracted state, and the winding motor 113 rotates to drive the motor gear 114 to rotate, thereby driving the small gear 118 and the inner winding drum 117 to rotate, and at the same time drives the large gear 116 and the middle winding drum 115 to rotate. The speed of the inner winding drum 117 is twice the speed of the middle winding drum 115. The middle winding drum 115 rotates to release the middle tube 102 through the middle rope 120, and the inner winding drum 117 rotates to release the inner tube 103 through the inner rope 121. 102 and the inner tube 103 descend under the action of gravity, the middle tube 102 slides downward along the fixed outer tube 101, and the inner tube 103 slides downward along the middle tube 102. When the middle tube 102 descends to the limit position, the inner tube 103 continues to descend. At this time, the middle rope 120 is continuously released, but the middle tube 102 does not continue to descend. When the middle tube 102 and the inner tube 103 are completely descended, the middle boss 202 contacts the outer stop 203, and the inner boss 206 contacts the middle stop 207. When the inner rope 121 and the middle rope 120 are released, they are guided by the guide wheel 119.

[0038] like Figure 5-Figure 13 As shown, the shallow extraction mechanism also includes a middle boss 202 arranged on the middle tube 102 , an outer stop 203 is arranged in the fixed outer tube 101 , an inner boss 206 is arranged on the inner tube 103 , and a middle stop 207 is arranged in the middle tube 102 .

[0039] like Figure 5-Figure 13 As shown, a middle closing spring 209 is arranged between the middle closing piece 208 and the middle tube 102 , and an outer closing spring 204 is arranged between the outer closing piece 201 and the fixed outer tube 101 .

[0040] like Figure 5-Figure 13 As shown, both the outer closing piece 201 and the middle closing piece 208 are provided with a liquid inlet groove 205 .

[0041] like Figure 5-Figure 13 As 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, 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, the elastic force of the inner docking spring 213 is greater than the elastic force of the middle closing spring 209, and rounded corners are provided on the middle docking block 210 and the inner docking block 212.

[0042] When the middle boss 202 contacts the outer stop 203, the inner boss 206 contacts the middle stop 207. At this time, the middle docking block 210 reaches the inner side of the outer sealing piece 201, and the inner docking block 212 reaches the inner side of the middle sealing piece 208. At this time, the middle docking spring 211 and the inner docking spring 213, which were originally in a compressed state, rebound, so that the middle docking block 210 and the inner docking block 212 pop out, and the middle docking block 210 pushes the outer sealing piece 201 to slide outward, and the outer sealing spring 204 is stretched. At this time, the shallow water passes through the outer sealing piece 201. The liquid inlet groove 205 on the back enters into the middle water inlet hole 214, and finally enters into the outer layer suction tube 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 into the inner water inlet hole 215 through the liquid inlet groove 205 on the back of the middle closing piece 208, and finally enters into the middle layer suction tube 124. The water pump group 110 draws the shallow layer water and the middle layer water into the detection box 108 through the collection tube 109 through the outer layer suction tube 123 and the middle layer suction tube 124 for detection.

[0043] When the pumping is completed, the winding motor 113 drives the inner winding drum 117 and the middle winding drum 115 to rotate, and the middle rope 120 and the inner rope 121 are wound, and the middle docking block 210 and the inner docking block 212 are pushed inward by the inner walls of the fixed 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, so that the outer closing plate 201 and the middle closing plate 208 are closed again.

[0044] like Fig.14 As shown, the deep extraction mechanism includes a sleeve 302 fixedly mounted on a fixed disk 301, a cylinder 303 fixedly mounted on the sleeve 302, a pressure rod 304 slidably mounted in the sleeve 302, the pressure rod 304 is slidably mounted with the fixed disk 301, an inner frame 307 is fixedly mounted in the inner layer tube 103, an inner sealing plate 306 is slidably mounted at the bottom of the inner layer tube 103, the inner sealing plate 306 is fixedly mounted with the pressure rod 304, and an inner closing spring 305 is arranged between the pressure rod 304 and the inner frame 307.

[0045] When the inner tube 103 falls completely, the cylinder 303 extends, pushing the pressure rod 304 and the inner sealing plate 306 to slide outward, and the inner sealing spring 305 is compressed. At this time, deep water enters the inner tube 103, and the water pump group 110 draws the deep water through the collection tube 109 into the detection box 108 through the inner suction tube 122 for detection.

[0046] The working principle of the multi-layer water sampling and detection equipment for inspecting polluted water sources disclosed in the present invention is as follows: when in use, the mounting plate 107 is placed on a ship or on the shore. In the initial state, the middle-layer tube 102 and the inner-layer tube 103 are in a retracted state, and 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 speed of the inner-layer winding drum 117 is twice the speed of the middle-layer winding drum 115. The middle-layer winding drum 115 rotates to release the middle-layer tube 102 through the middle-layer rope 120, and the inner-layer winding drum 117 rotates to release the middle-layer tube 102 through the inner-layer rope 120. 121 releases the inner tube 103, and the middle tube 102 and the inner tube 103 descend under the action of gravity. The middle tube 102 slides downward along the fixed outer tube 101, and the inner tube 103 slides downward along the middle tube 102. When the middle tube 102 descends to the limit position, the inner tube 103 continues to descend. At this time, the middle rope 120 is continuously released, but the middle tube 102 does not continue to descend. When the middle tube 102 and the inner tube 103 complete their descent, the middle boss 202 contacts the outer stop 203, and the inner boss 206 contacts the middle stop 207. When the inner rope 121 and the middle rope 120 are released, they are guided by the guide wheel 119. When the middle boss 202 contacts the outer stop 203, the inner boss 206 contacts the middle stop 207. At this time, the middle docking block 210 reaches the inner side of the outer sealing piece 201, and the inner docking block 212 reaches the inner side of the middle sealing piece 208. At this time, the middle docking spring 211 and the inner docking spring 213, which were originally in a compressed state, rebound, so that the middle docking block 210 and the inner docking block 212 pop out, and the middle docking block 210 pushes the outer sealing piece 201 to slide outward, and the outer sealing spring 204 is stretched. At this time, shallow water enters the middle water inlet hole 214 through the liquid inlet groove 205 on the back of the outer sealing piece 201, and finally enters the outer layer suction tube 123. At the same time, the inner docking block 212 pushes the middle sealing piece 208 to slide outward, the middle sealing spring 209 is stretched, and the middle layer water enters the inner water inlet hole 215 through the liquid inlet groove 205 on the back of the middle sealing piece 208, and finally enters the middle layer suction tube 124. When the inner layer tube 103 falls completely, the cylinder 303 extends, pushing the pressure rod 304 and the inner sealing piece 306 to slide outward, and the inner sealing spring 305 is compressed. At this time, the deep layer water enters the inner layer tube 103, and the water pump group 110 draws the deep layer water, shallow layer water and middle layer water into the detection box 108 through the collection tube 109 through the inner layer suction tube 122, the outer layer suction tube 123 and the middle layer suction tube 124 for detection.When the pumping is completed, the winding motor 113 drives the inner winding drum 117 and the middle winding drum 115 to rotate, and the middle rope 120 and the inner rope 121 are wound. The middle docking block 210 and the inner docking block 212 are pushed inward by the inner walls of the fixed 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, so that the outer closing plate 201 and the middle closing plate 208 are closed again, the cylinder 303 is retracted, and the inner closing spring 305 rebounds, so that the inner closing plate 306 closes the bottom of the inner tube 103 again, and finally the middle tube 102 and the inner tube 103 are wound to the top.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-layer water sampling and detection device for testing polluted water sources, comprising an insertion mechanism for inserting into water, characterized in that: The insertion mechanism comprises a fixed outer tube (101), and is provided with a shallow sampling mechanism for sampling shallow polluted water and middle polluted water, and a deep sampling mechanism for sampling deep polluted water. The shallow sampling mechanism comprises an outer sealing plate (201) slidably mounted on the fixed outer tube (101), and the deep sampling mechanism comprises a fixed plate (301); The insertion mechanism comprises a middle tube (102) slidably mounted in a fixed outer tube (101), an inner tube (103) slidably mounted in the inner tube (103), an inner docking plate (105) fixedly mounted on the inner tube (103), and a middle docking plate (106) fixedly mounted on the middle tube (102); The shallow extraction mechanism comprises a middle closing plate (208) slidably mounted on the middle tube (102), an inner docking block (212) slidably mounted on the inner docking plate (105), and a middle docking block (210) slidably mounted on the middle docking plate (106).

2. The multi-layer water sampling and detection device for detecting polluted water sources according to claim 1, characterized in that: The insertion mechanism further comprises a connecting pipe (104) fixedly mounted on the fixed outer pipe (101); a mounting plate (107) is fixedly mounted on the connecting pipe (104); a water pump group (110) and a detection box (108) are arranged on the mounting plate (107); the water pump group (110) is composed 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 via a collecting pipe (109); an inner layer extraction pipe (122), an outer layer extraction pipe (123) and a middle layer extraction pipe (124) are respectively fixedly mounted on the three water pumps; the inner layer extraction pipe (122) is fixedly mounted on the fixed plate (301); the outer layer extraction pipe (123) is fixedly mounted on and communicated with the inner docking plate (105); and the middle layer extraction pipe (124) is fixedly mounted on and communicated with the middle docking plate (106).

3. The multi-layer water sampling and detection device for detecting polluted water sources according to claim 2 is characterized in that: A winding frame (111) is fixedly mounted on the mounting plate (107); a middle winding drum (115) and an inner winding drum (117) are rotatably mounted on the winding frame (111); a large gear (116) is fixedly mounted on the middle winding drum (115); a small gear (118) is fixedly mounted on the inner winding drum (117); a winding motor (113) is fixedly mounted on the mounting plate (107); and a motor shaft of the winding motor (113) is fixedly mounted on the winding motor (113). A motor gear (114) is installed, the motor gear (114) is meshed with a large gear (116), the motor gear (114) is meshed with a 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 tube (103), and a middle layer rope (120) is wound around the middle layer winding drum (115), and the end of the middle layer rope (120) is fixedly installed with the middle layer tube (102).

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

5. The multi-layer water sampling and detection device for detecting polluted water sources according to claim 1, characterized in that: The shallow extraction mechanism further comprises a middle boss (202) arranged on the middle tube (102), an outer stop (203) is arranged in the fixed outer tube (101), an inner boss (206) is arranged on the inner tube (103), and a middle stop (207) is arranged in the middle tube (102).

6. The multi-layer water sampling and detection device for detecting polluted water sources according to claim 5, characterized in that: A middle closing spring (209) is provided between the middle closing piece (208) and the middle tube (102), and an outer closing spring (204) is provided between the outer closing piece (201) and the fixed outer tube (101).

7. The multi-layer water sampling and detection device for detecting polluted water sources according to claim 6, characterized in that: The outer closing piece (201) and the middle closing piece (208) are both provided with a liquid inlet groove (205).

8. The multi-layer water sampling and detection device for detecting polluted water sources according to claim 7, characterized in that: The middle docking block (210) is provided with a middle water inlet hole (214), the inner docking block (212) is provided with an inner water inlet hole (215), a middle docking spring (211) is provided between the middle docking block (210) and the middle docking plate (106), 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), the elastic force of the inner docking spring (213) is greater than the elastic force of the middle closing spring (209), and the middle docking block (210) and the inner docking block (212) are provided with rounded corners.

9. The multi-layer water sampling and detection device for detecting polluted water sources according to claim 1, characterized in that: The deep extraction mechanism comprises a sleeve (302) fixedly mounted on a fixed disk (301), a cylinder (303) fixedly mounted on the sleeve (302), a pressure rod (304) slidably mounted in the sleeve (302), the pressure rod (304) and the fixed disk (301) being slidably mounted, an inner frame (307) fixedly mounted in the inner layer tube (103), an inner sealing plate (306) slidably mounted at the bottom of the inner layer tube (103), the inner sealing plate (306) and the pressure rod (304) being fixedly mounted, and an inner sealing spring (305) being arranged between the pressure rod (304) and the inner frame (307).

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