Multi-channel water quality rapid detection device

Abstract

The invention belongs to the technical field of water quality detection, and particularly relates to a multi-channel water quality rapid detection device which comprises a base and a multi-channel transmission controller mounted on the side wall of the base, and a plurality of different water quality detection probes are arranged on the outer side of the base. The base is provided with a plurality of water quality detection probes, the multi-channel transmission controller feeds back detection signals of the water quality detection probes to the handheld terminal, the multiple detection cavities are formed in the base and are mutually staggered, and the water quality detection probes are detachably installed at the corresponding detection cavities. Multi-parameter detection of water samples at the same depth can be achieved through the array type detection probes, the accuracy and effectiveness of water quality detection results are improved, water samples at different depths can be detected, the device is suitable for various water environments, meanwhile, detection result deviation caused by residual water can be avoided as much as possible, and the water sample detection precision is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water quality detection, and in particular relates to a multi-channel water quality rapid detection device. Background Art

[0002] River and lake water quality testing is a core link in water ecological protection. Real-time understanding of water quality conditions can provide timely warnings of pollution, evaluate the effectiveness of governance, provide a basis for water resource management, ensure drinking water safety and ecological balance, and is crucial to maintaining the health of rivers and lakes and regional sustainable development.

[0003] In river and lake water quality testing scenarios, due to the unknown pollution area, traditional sampling is prone to duplicate water samples, which not only increases the testing burden but also reduces the efficiency of locating the pollution area. On-site water quality detection probes can quickly detect, significantly improve efficiency, and help locate the pollution area. Nowadays, to further improve detection efficiency, water quality testing equipment often integrates multiple detection probes to achieve multi-parameter one-time detection. For example, patent announcement number CN214585373U discloses a multi-channel water quality detection device. Although the multi-channel water quality detection device disclosed in the above patent can realize stratified detection of rivers and lakes by arranging the detection probes at different positions of the connecting parts, it still has significant limitations. First, a single detection probe only supports single parameter detection, and water bodies at different depths of rivers and lakes are affected by factors such as light, sediment, and water flow disturbance. The water quality parameters vary significantly. Single parameter detection is difficult to fully reflect the true water quality conditions at a certain depth, resulting in insufficient data representativeness; second, although the device can adjust the probe position for cyclic detection of different depths, water bodies naturally have fluidity and dynamic change characteristics. Water samples at the same depth have obvious fluctuations in composition at different time points. For example, the concentration of pollutants and dissolved oxygen content carried by the water flow will change with the water flow speed and direction. This dynamic change makes the "same depth" data obtained during the probe cyclic detection lack comparability, which ultimately causes deviations in the comprehensive water quality analysis results, and cannot accurately present the actual status of river and lake water quality, affecting the accuracy and effectiveness of water quality detection. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-channel water quality rapid detection device in response to the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: a multi-channel water quality rapid detection device, comprising a base and a multi-channel transmission controller mounted on the side wall of the base, wherein a plurality of different water quality detection probes are disposed on the outside of the base, and the multi-channel transmission controller feeds back the detection signals of each water quality detection probe to a handheld terminal, and further comprising: Multiple detection cavities are provided inside the base, and the detection cavities are staggered with each other. Each water quality detection probe can be detachably installed in the corresponding detection cavity; A water sample replacement component is arranged inside the base, and each detection cavity is connected to the water sample replacement component; A water sample supply unit is provided on one side of the base and is in communication with the corresponding detection cavity; The air drying unit is sleeved on the outer side of the base, and each detection cavity and the water sample replacement component are connected to the air drying unit.

[0006] Preferably, the water sample replacement component includes a plurality of temporary storage chambers opened inside the base, and each temporary storage chamber is arranged on one side between two adjacent detection chambers, a liquid inlet hole is opened on the upper side of the cavity wall of each detection cavity, each of the temporary storage chambers is connected to the liquid inlet hole on the same side, a liquid inlet electric-controlled valve is installed inside each liquid inlet hole, a liquid outlet hole is opened on the lower side of the cavity wall of each detection cavity, and each temporary storage chamber is connected to the liquid outlet hole on the same side, a liquid outlet electric-controlled valve is installed inside each liquid outlet hole, a liquid inlet pipe and a liquid outlet pipe are provided on one side of the base, and the liquid inlet pipe and the liquid outlet pipe are connected to the corresponding liquid inlet hole and liquid outlet hole.

[0007] Preferably, the water sample supply unit includes a mounting plate arranged on one side of the base, a water pump is fixedly installed on the end face of the mounting plate, the output end of the water pump is fixedly connected to a liquid supply hose, and the end of the liquid supply hose away from the water pump is detachably connected to the liquid inlet pipe, and a lifting mechanism is installed on the side wall of the base, and the lifting mechanism is used to adjust the depth of the mounting plate in the water body.

[0008] Preferably, the air drying unit includes a U-shaped plate fixedly mounted on the outside of the base, a U-shaped cavity is opened inside the U-shaped plate, the top of the U-shaped plate is fixedly connected to a mounting cover connected to the U-shaped cavity, and a fan is fixedly installed inside the mounting cover, a plurality of main ventilation ducts and a plurality of auxiliary ventilation ducts are fixedly plugged into the side walls of the U-shaped cavity, each of the main ventilation ducts is connected to the corresponding detection cavity, and each auxiliary ventilation duct is connected to the corresponding temporary storage cavity, an air inlet electric control valve is fixedly installed inside each of the main ventilation ducts and each auxiliary ventilation duct, an exhaust hole is opened on the cavity wall of each of the detection cavity and each temporary storage cavity, and an exhaust electric control valve is fixedly installed inside each exhaust hole.

[0009] Preferably, the lifting mechanism includes a winding box fixedly mounted on the side wall of the base, and two winding rollers are rotatably arranged inside the winding box, and both of the winding rollers are wrapped with a pull belt. Two strip holes are provided at the bottom of the winding box, and the two pull belts are fixedly connected to the mounting plate through the strip holes on the same side. The inner side wall of the winding box is rotatably connected to two mutually meshing gears, and the wheel axles of the two gears are transmission-connected to the roller axles of the winding rollers on the same side. An encoder is fixedly mounted on the inner side wall of the winding box, and the encoder converts the number of rotations of the gears on the same side into electrical signals and feeds back to the handheld terminal through a multi-channel transmission controller. A drive motor is fixedly mounted on the outer side wall of the winding box, and the drive motor drives the gears on the same side to rotate.

[0010] Preferably, the outer sleeve of the water pump is provided with a stainless steel mesh sleeve, and the stainless steel mesh sleeve is detachably connected to the mounting plate.

[0011] Preferably, two groups of heating rods are fixedly arranged inside the U-shaped cavity, and the two groups of heating rods are respectively arranged on both sides of the base and correspond to the positions of the main ventilation pipes and the auxiliary ventilation pipes.

[0012] Preferably, a U-shaped cover is fixedly mounted on the bottom of the winding box, the mounting plate is placed on the inner side of the U-shaped cover, and a detachable cover is hinged on the side wall of the U-shaped cover.

[0013] Compared with existing technologies, the advantages of a multi-channel water quality rapid detection device are: 1. Through the mutual cooperation of the provided base, multi-channel transmission controller, water quality detection probe, detection chamber, and water sample transposition component, and through multiple detection probes distributed in an array, multi-parameter detection can be performed on the same water sample at the same depth, thereby improving the accuracy and effectiveness of the water quality detection results at a certain depth of the water body.

[0014] 2. Through the set water sample supply unit, water samples can be extracted from the water body on site, and water samples of different depths can be automatically extracted. It can be applied to water environments of different depths and has good applicability.

[0015] 3. The air-drying unit can automatically dry the residual water in each detection cavity every time the water sample position is switched, avoiding the deviation of the water sample detection results caused by the residual water, and further improving the accuracy of water sample detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a multi-channel rapid water quality detection device provided by the present invention; Figure 2 This is a schematic cross-sectional view of a multi-channel rapid water quality detection device provided by the present invention; Figure 3The present invention provides a multi-channel water quality rapid detection device Figure 2 A magnified view of the structure of part A; Figure 4 This is a side view schematic diagram of the internal structure of a base of a multi-channel rapid water quality detection device provided by the present invention; Figure 5 This is a schematic diagram of the positions of the main ventilation pipe and the auxiliary ventilation pipe of a multi-channel water quality rapid detection device provided by the present invention; Figure 6 This is a schematic diagram of the internal structure of a winding box of a multi-channel water quality rapid detection device provided by the present invention; Figure 7 The diagram is a top view of the structure of a winding box of a multi-channel rapid water quality detection device provided by the present invention.

[0017] In the figure: 1 base, 2 multi-channel transmission controller, 3 water quality detection probe, 4 detection chamber, 5 water sample transposition component, 51 temporary storage chamber, 52 liquid inlet hole, 53 liquid inlet electric control valve, 54 liquid outlet hole, 55 liquid outlet electric control valve, 56 liquid inlet pipe, 57 liquid outlet pipe, 6 water sample supply unit, 61 mounting plate, 62 water pump, 63 liquid supply hose, 7 air drying unit, 71 U-shaped plate, 72 U-shaped chamber, 73 mounting cover, 74 fan, 75 main ventilation pipe, 76 auxiliary ventilation pipe, 77 air inlet electric control valve, 78 exhaust hole, 79 exhaust electric control valve, 8 lifting mechanism, 81 winding box, 82 winding roller, 83 pull belt, 84 strip hole, 85 gear, 86 encoder, 87 drive motor, 9 stainless steel mesh sleeve, 10 heating rod, 11 U-shaped cover, 12 cover plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0019] like Figure 1-Figure 7As shown, a multi-channel water quality rapid detection device includes a base 1 and a multi-channel transmission controller 2 installed on the side wall of the base 1. A plurality of different water quality detection probes 3 are arranged on the outside of the base 1, and the multi-channel transmission controller 2 feeds back the detection signals of each water quality detection probe 3 to the handheld terminal. It also includes: a plurality of detection chambers 4, the plurality of detection chambers 4 are all opened inside the base 1, and the detection chambers 4 are staggered with each other, and each water quality detection probe 3 can be detachably installed in the corresponding detection chamber 4. A water sample transposition component 5 is arranged inside the base 1, and each detection chamber 4 is connected to the water sample transposition component 5. The water sample transposition component 5 includes a plurality of temporary storage chambers 51 opened inside the base 1. , and each temporary storage chamber 51 is arranged on one side between two adjacent detection chambers 4, a liquid inlet hole 52 is opened on the upper side of the cavity wall of each detection chamber 4, each temporary storage chamber 51 is connected to the liquid inlet hole 52 on the same side, and a liquid inlet electric-controlled valve 53 is installed inside each liquid inlet hole 52, a liquid outlet hole 54 is opened on the lower side of the cavity wall of each detection chamber 4, and each temporary storage chamber 51 is connected to the liquid outlet hole 54 on the same side, and a liquid outlet electric-controlled valve 55 is installed inside each liquid outlet hole 54, and a liquid inlet pipe 56 and a liquid outlet pipe 57 are provided on one side of the base 1, and the liquid inlet pipe 56 and the liquid outlet pipe 57 are connected to the corresponding liquid inlet hole 52 and the liquid outlet hole 54, so that the same water sample can pass through each detection chamber 4 in sequence.

[0020] The water sample supply unit 6 is arranged on one side of the base 1, and the water sample supply unit 6 is connected to the corresponding detection chamber 4. The water sample supply unit 6 includes a mounting plate 61 arranged on one side of the base 1. A water pump 62 is fixedly installed on the end surface of the mounting plate 61. The output end of the water pump 62 is fixedly connected to a liquid supply hose 63. The end of the liquid supply hose 63 away from the water pump 62 is detachably connected to the liquid inlet pipe 56. A lifting mechanism 8 is installed on the side wall of the base 1, and the lifting mechanism 8 is used to adjust the depth of the mounting plate 61 in the water body. The lifting mechanism 8 includes a winding box 81 fixedly mounted on the side wall of the base 1, and the internal rotation of the winding box 81 is provided with two winding rollers 82. The two winding rollers 82 are both wrapped with a draw belt 83. The bottom of the winding box 81 has two openings. The strip hole 84 is formed, and the two pull belts 83 are fixedly connected to the mounting plate 61 through the strip hole 84 on the same side. The inner wall of the winding box 81 is rotatably connected to two mutually meshing gears 85, and the wheel axles of the two gears 85 are transmission-connected to the roller shaft of the winding roller 82 on the same side. The inner wall of the winding box 81 is fixedly installed with an encoder 86, and the encoder 86 converts the number of rotations of the gear 85 on the same side into an electrical signal and feeds it back to the handheld terminal through the multi-channel transmission controller 2. The outer wall of the winding box 81 is fixedly installed with a drive motor 87, and the drive motor 87 drives the gear 85 on the same side to rotate. The encoder 86 is based on the principle of incremental photoelectric encoding, and converts each rotation of the gear 85 into a pulse signal through the transparent and opaque grids on the code disk.

[0021] The air drying unit 7 is sleeved on the outside of the base 1, and each detection cavity 4 and the water sample transposition component 5 are connected to the air drying unit 7. The air drying unit 7 includes a U-shaped plate 71 fixedly sleeved on the outside of the base 1, a U-shaped cavity 72 is opened inside the U-shaped plate 71, a mounting cover 73 connected to the U-shaped cavity 72 is fixedly connected to the top of the U-shaped plate 71, and a fan 74 is fixedly installed inside the mounting cover 73. A plurality of main ventilation pipes 75 and a plurality of auxiliary ventilation pipes 76 are fixedly plugged into the side walls of the U-shaped cavity 72. Each main ventilation pipe 75 is connected to the corresponding detection chamber 4, and each auxiliary ventilation pipe 76 is connected to the corresponding temporary storage chamber 51. An air inlet electric control valve 77 is fixedly installed inside each main ventilation pipe 75 and each auxiliary ventilation pipe 76. An exhaust hole 78 is opened on the cavity wall of each detection chamber 4 and each temporary storage chamber 51, and an exhaust electric control valve 79 is fixedly installed inside each exhaust hole 78. By ventilating the inside of the detection chamber 4 and the temporary storage chamber 51, residual water can be assisted in removal.

[0022] The outer side of the water pump 62 is provided with a stainless steel mesh sleeve 9 , and the stainless steel mesh sleeve 9 is detachably connected to the mounting plate 61 . The stainless steel mesh sleeve 9 can prevent large particles of impurities from being sucked into the water pump 62 .

[0023] Two groups of heating rods 10 are fixedly installed inside the U-shaped cavity 72. The two groups of heating rods 10 are respectively arranged on both sides of the base 1 and correspond to the positions of each main ventilation pipe 75 and auxiliary ventilation pipe 76. The heating rods 10 can assist the fan 74 to remove residual water.

[0024] A U-shaped cover 11 is fixedly installed at the bottom of the winding box 81, and the mounting plate 61 is placed on the inner side of the U-shaped cover 11. The side wall of the U-shaped cover 11 is hinged with a detachable cover 12. The water pump 62 and the liquid supply hose 63 can be stored through the U-shaped cover 11 and the cover 12.

[0025] The operating principle of the present invention is now explained as follows: select a water quality detection area, then open the cover 12, and pull the water pump 62 out of the U-shaped cover 11, then install and connect the liquid supply hose 63 to the liquid inlet pipe 56, and then connect the power supply port (not shown in the figure) on the side wall of the base 1 to an external portable power source. Then, send an instruction to the multi-channel transmission controller 2 through the handheld terminal, and the multi-channel transmission controller 2 will immediately control the drive motor 87 to start working. At this time, the drive motor 87 will drive the two winding rollers 82 to rotate through two mutually meshing gears 85, so that the two pull belts 83 can be released. At this time, the mounting plate 61 can be placed in water. Then, the staff can send a detection instruction to the multi-channel transmission controller 2 through the handheld terminal. At this time, the multi-channel transmission controller The controller 2 will immediately control the drive motor 87 to stop working, and control the water pump 62 to start working, and control the liquid inlet electric control valve 53 in the liquid inlet hole 52 at the uppermost detection chamber 4 to be energized and opened. The water pump 62 can pump the water into the liquid inlet pipe 56 through the liquid supply hose 63, and then the water sample enters the uppermost detection chamber 4. When the liquid level detection probe in the uppermost detection chamber 4 detects that the liquid level reaches four-fifths of the detection chamber 4, the liquid level detection probe will feedback an electrical signal to the multi-channel transmission controller 2, and the multi-channel transmission controller 2 will immediately control the water pump 62 to stop working, and the water sampling of a single area is completed (the liquid level detection probe is not marked in the figure. It can detect the water level inside the detection chamber 4 in real time and feedback an electrical signal to the multi-channel transmission controller 2 after the water level reaches the set value); After the water sampling of a single area is completed, the multi-channel transmission controller 2 will control the drive motor 87 to resume work. At this time, the two pull belts 83 continue to be released, and the position of the water pump 62 continues to move downward. When the drive motor 87 drives the gear 85 to drive the winding roller 82 to rotate and release the pull belt 83, the encoder 86 will convert the number of rotations of the gear 85 into an electrical signal and feed it back to the multi-channel transmission controller 2 (the encoder 86 is based on the incremental photoelectric encoding principle, and converts each rotation of the gear 85 into a pulse signal through the transparent and opaque grids on the code disk). Therefore, the position of the water pump 62 can be calculated in real time by detecting the number of rotations of the gear 85 by the encoder 86. After the water pump 62 moves down a certain distance (the distance can be set through the handheld terminal, and the set value is sent to the multi-channel transmission controller 2, for example, every time it moves 0.5 meters), the multi-channel transmission controller 2 will control the drive motor 87 to stop working again; During the downward movement of the water pump 62, the multi-channel transmission controller 2 will control the water quality detection probe 3 to work, and the water quality detection probe 3 will detect the water quality in the detection chamber 4 with a single parameter, and feed back the detection result to the handheld terminal through the multi-channel transmission controller 2. After the detection of the water quality detection probe 3 is completed, the multi-channel transmission controller 2 will control the liquid outlet electric control valve 55 in each liquid outlet hole 54 to be energized and opened. At this time, the water in the detection chamber 4 will enter the corresponding temporary storage chamber 51 through the liquid outlet hole 54, and the water in the temporary storage chamber 51 on the lower side will be discharged through the liquid outlet hole 54 through the liquid outlet pipe 57. After that, the multi-channel transmission controller 2 starts the fan 74 and the heating rod 10, and controls the air inlet electric control valve 77 in each main ventilation pipe 75 and the exhaust electric control valve 79 connected to each detection chamber 4 to be energized and opened. The fan 74 can send air flow into the U-shaped cavity 72, and the heating rod 10 can heat the air flow (the heating temperature does not exceed 50°C. If the water quality detection probe 3 is not heat-resistant, the heating temperature of the heating rod 10 can be reduced through the handheld terminal, and the working time of the fan 74 and the heating rod 10 can be extended). The heated air flow will enter the various detection chambers 4 through the main ventilation pipe 75 and pass through The air is discharged through the exhaust hole 78, and the heated air flow can be used to remove the residual water in the detection chamber 4 to prevent the residual water from mixing with the water sample and affecting the detection accuracy. After the fan 74 has been working for 1 minute, the multi-channel transmission controller 2 controls the liquid inlet electric control valve 53 in each liquid inlet hole 52 from bottom to top to be energized and opened for 5 seconds. At this time, the water temporarily stored in the temporary storage chamber 51 will be transferred to the next detection chamber 4 in turn. For example, after the liquid inlet electric control valve 53 in the liquid inlet hole 52 at the bottom detection chamber 4 is opened, the water sample in the bottom temporary storage chamber 51 will flow into the bottom detection chamber 4, while the water sample in the top detection chamber 4 will flow into the bottom detection chamber 4. After the liquid inlet electric control valve 53 is opened and the water pump 62 is lowered into place, when the multi-channel transmission controller 2 controls the drive motor 87 to stop working again, the multi-channel transmission controller 2 will control the water pump 62 to work, and the water pump 62 will extract the water sample again and transport it to the uppermost detection chamber 4. Since the water samples extracted from the water body of a single depth will flow through each detection chamber 4 in sequence, each water quality detection probe 3 can perform multi-parameter detection on the same water sample, thereby ensuring a comprehensive analysis of the water quality of water bodies at different depths, and the extraction of water samples and water quality detection at different depths can be carried out simultaneously, so the detection efficiency can be ensured. After the water in the temporary storage chamber 51 is transferred to the detection chamber 4, the multi-channel transmission controller 2 controls the fan 74 and the heater 10 to operate again, and controls the air inlet electric control valve 77 in the auxiliary ventilation pipe 76 and the air exhaust electric control valve 79 in the exhaust hole 78 connected to the temporary storage chamber 51 to be energized and opened, thereby draining the residual water in the temporary storage chamber 51 and preventing the mixing of different water samples from affecting the detection accuracy (the fan 74 and the heater 10 operate for 1 minute). As the water pump 62 descends, after the water pump 62 moves to the bottom of the water, since the water pump 62 cannot move further downward, the driving motor 87 continues to release the pull belt 83, and the pull belt 83 will change from a tight state to a loose state. At this time, the staff can end the water quality detection of the current area and send an end instruction to the multi-channel transmission controller 2 through the handheld terminal. The multi-channel transmission controller 2 will control the driving motor 87 to reverse and recycle and reset the water pump 62 (the multi-channel transmission controller 2 controls the number of rotations of the gear 85 when the driving motor 87 reverses according to the number of electrical signals fed back by the encoder 86 when the water pump 62 is lowered, to ensure that the water pump 62 is recovered in place). Secondly, when it is detected that a certain parameter of the water sample exceeds the standard, the staff can receive the water sample from the liquid outlet pipe 57 through a storage container, thereby preserving the water sample, which is convenient for later re-inspection by precision instruments and recording the current water area position. After the completion of a single area, the multi-channel transmission controller 2 will control all the electronically controlled valves to open and completely discharge the water sample and residual water. At the same time, the water quality detection probe 3 can be selected according to actual needs.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-channel water quality rapid detection device, comprising a base (1) and a multi-channel transmission controller (2) mounted on a side wall of the base (1), wherein a plurality of different water quality detection probes (3) are arranged on the outside of the base (1), and the multi-channel transmission controller (2) feeds back the detection signals of the respective water quality detection probes (3) to a handheld terminal, characterized in that: Also includes: A plurality of detection cavities (4) are all provided inside the base (1), and the detection cavities (4) are staggered with each other, and each of the water quality detection probes (3) can be detachably installed in the corresponding detection cavity (4); A water sample transposition component (5) is arranged inside the base (1), and each detection cavity (4) is connected to the water sample transposition component (5); A water sample supply unit (6) is provided on one side of the base (1), and the water sample supply unit (6) is connected to the corresponding detection cavity (4); The air drying unit (7) is sleeved on the outside of the base (1), and each detection cavity (4) and the water sample transposition component (5) are connected to the air drying unit (7).

2. A multi-channel water quality rapid detection device according to claim 1, characterized in that: The water sample transposition component (5) comprises a plurality of temporary storage chambers (51) provided inside the base (1), and each temporary storage chamber (51) is provided on one side between two adjacent detection chambers (4); a liquid inlet hole (52) is provided on the upper side of the cavity wall of each detection chamber (4); each temporary storage chamber (51) is connected to the liquid inlet hole (52) on the same side; a liquid inlet electric control valve (53) is installed inside each liquid inlet hole (52); a liquid outlet hole (54) is provided on the lower side of the cavity wall of each detection chamber (4); each temporary storage chamber (51) is connected to the liquid outlet hole (54) on the same side; a liquid outlet electric control valve (55) is installed inside each liquid outlet hole (54); a liquid inlet pipe (56) and a liquid outlet pipe (57) are provided on one side of the base (1); the liquid inlet pipe (56) and the liquid outlet pipe (57) are both connected to the corresponding liquid inlet hole (52) and the liquid outlet hole (54).

3. A multi-channel water quality rapid detection device according to claim 2, characterized in that: The water sample supply unit (6) comprises a mounting plate (61) arranged on one side of the base (1); a water pump (62) is fixedly mounted on the end surface of the mounting plate (61); an output end of the water pump (62) is fixedly connected to a liquid supply hose (63); an end of the liquid supply hose (63) away from the water pump (62) is detachably connected to a liquid inlet pipe (56); a lifting mechanism (8) is mounted on the side wall of the base (1), and the lifting mechanism (8) is used to adjust the depth of the mounting plate (61) in the water body.

4. A multi-channel water quality rapid detection device according to claim 2, characterized in that: The air drying unit (7) comprises a U-shaped plate (71) fixedly mounted on the outside of the base (1), a U-shaped cavity (72) is provided inside the U-shaped plate (71), a mounting cover (73) in communication with the U-shaped cavity (72) is fixedly connected to the top of the U-shaped plate (71), and a fan (74) is fixedly mounted inside the mounting cover (73), and a plurality of main ventilation pipes (75) and a plurality of auxiliary ventilation pipes (76) are fixedly connected to the side walls of the U-shaped cavity (72), each of which is connected to a plurality of auxiliary ventilation pipes (76). The main ventilation pipes (75) are all connected to the corresponding detection chambers (4), and each auxiliary ventilation pipe (76) is connected to the corresponding temporary storage chamber (51). An air inlet electric control valve (77) is fixedly installed inside each main ventilation pipe (75) and each auxiliary ventilation pipe (76). An exhaust hole (78) is opened on the cavity wall of each detection chamber (4) and each temporary storage chamber (51), and an exhaust electric control valve (79) is fixedly installed inside each exhaust hole (78).

5. A multi-channel water quality rapid detection device according to claim 3, characterized in that: The lifting mechanism (8) includes a winding box (81) fixedly mounted on the side wall of the base (1), and two winding rollers (82) are rotatably provided inside the winding box (81), and the two winding rollers (82) are both wound with a drawstring (83), and the bottom of the winding box (81) is provided with two strip holes (84), and the two drawstrings (83) are both fixedly connected to the mounting plate (61) through the strip holes (84) on the same side, and the inner side wall of the winding box (81) is rotatably connected to two mutually meshing The gears (85) are connected to each other, and the axles of the two gears (85) are both connected to the roller shaft of the winding roller (82) on the same side. An encoder (86) is fixedly installed on the inner wall of the winding box (81), and the encoder (86) converts the number of rotations of the gear (85) on the same side into an electrical signal and feeds it back to the handheld terminal through the multi-channel transmission controller (2). A drive motor (87) is fixedly installed on the outer wall of the winding box (81), and the drive motor (87) drives the gear (85) on the same side to rotate.

6. A multi-channel water quality rapid detection device according to claim 3, characterized in that: The outer side of the water pump (62) is provided with a stainless steel mesh sleeve (9), and the stainless steel mesh sleeve (9) is detachably connected to the mounting plate (61).

7. A multi-channel water quality rapid detection device according to claim 4, characterized in that: Two groups of heating rods (10) are fixedly arranged inside the U-shaped cavity (72). The two groups of heating rods (10) are respectively arranged on both sides of the base (1) and correspond to the positions of the main ventilation pipes (75) and the auxiliary ventilation pipes (76).

8. A multi-channel water quality rapid detection device according to claim 5, characterized in that: A U-shaped cover (11) is fixedly mounted on the bottom of the winding box (81), the mounting plate (61) is placed on the inner side of the U-shaped cover (11), and a detachable cover plate (12) is hinged on the side wall of the U-shaped cover (11).

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