CN114200095A

CN114200095A - Water quality detector

Info

Publication number: CN114200095A
Application number: CN202111320750.3A
Authority: CN
Inventors: 卢莹; 李磊
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-03-18

Abstract

The invention relates to the field of water quality detectors, in particular to a water quality detector which comprises a base and a detector body arranged above the base, wherein a loading box is arranged at the top of the base, a battery box, the detector body and a control box are arranged in the loading box, movable moving seats are arranged on two sides of the loading box, and the base and the moving seats are made of foam materials; and both sides of the bottom of the base and one end of the bottom of the movable seat are provided with a driving mechanism and a sampling mechanism. When the device is stationary for detection each time, the sampling tube below can extract a water sample at the detected position. Supply follow-up staff to detect water sample once more or keep, improve subsequent detection diversity, when water gets into the inside of sampling tube, strike the impeller, and then make water obtain the stirring, get into the inside water of sampling tube more diversified, can sample the material that contains in the aquatic on every side as far as.

Description

Water quality detector

Technical Field

The invention relates to the field of water quality detectors, in particular to a water quality detector.

Background

The water quality detector is a professional instrument for analyzing the content of water quality components, and is used for measuring the following components in water: BOD, COD, ammonia nitrogen, total phosphorus, total nitrogen, turbidity, PH, dissolved oxygen and the like. Is a main instrument for detecting the content of various substances in water at present.

The water quality testing appearance that uses commonly used mostly is placed and is used on the workstation, will wait to detect the water sample and put into water quality testing appearance and detect, at first need collect the water sample, takes the sample back to the other completion of water quality testing appearance and detects. For rivers or lakes with large water area and dispersed substance content in water, particularly in remote mountain areas, the bank of the water area is difficult to walk, the bank is difficult to move at the bank position, multiple sampling is carried out at the same position, or the position is continuously changed for multiple sampling, so that the detection speed is low. The real-time detection on the water surface to be detected cannot be carried out, so that the accuracy of the detection result is not high, and the water quality of the actual water area cannot be truly reflected.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a water quality detector.

The purpose of the invention can be realized by the following technical scheme:

a water quality detector comprises a base and a detector body arranged above the base, wherein a loading box is arranged at the top of the base, a battery box, the detector body and a control box are arranged in the loading box, movable moving seats are arranged on two sides of the loading box, and the base and the moving seats are made of foam materials; and both sides of the bottom of the base and one end of the bottom of the movable seat are provided with a driving mechanism and a sampling mechanism.

Sampling mechanism includes and detects head and sampling tube, and the bottom of base and removal seat is provided with first loading chamber with the installation department that detects the head, and the bottom of base and removal seat is provided with the second with the installation department of sampling tube and loads the chamber, detects head and detector body electric connection, and the first pivot of one end fixedly connected with of detecting the head, and first pivot rotation is installed in the inside of first loading chamber.

A second rotating shaft is rotatably arranged in the second loading cavity, a plurality of threaded cylinders are uniformly connected to the outer part of the second rotating shaft along the circumferential direction, and one end of each threaded cylinder, which is far away from the second rotating shaft, is in threaded connection with a sampling tube; the base loads the chamber with the second with the first bottom of removing the seat and is provided with the storage chamber between the chamber at first loading chamber, the apron is installed to the bottom of storing the chamber, the one end of first pivot and second pivot extends to the inside of storing the chamber, the diameter of first pivot is less than the diameter of second pivot, return spring is installed with the first interior wall connection department that loads the chamber to the one end that the second pivot was kept away from to first pivot, other end outer wall connection has one to promote the subassembly, the one end of second pivot towards first pivot all is connected with the lug in the bottom of every screw thread section of thick bamboo, it can promote the lug to promote the subassembly.

Preferably, promote the subassembly and include stable seat and push pedal, stable seat and the outer wall fixed connection of first pivot, the one end that first pivot was kept away from to stable seat is provided with the recess, inside one side fixedly connected with limiting plate of recess, and the bottom fixedly connected with dwang of push pedal, the dwang rotates and installs in the inside of recess, return spring is also installed with the junction of recess to the dwang, the upper portion both sides of push pedal all are the arc setting, and the push pedal can contact with the lug.

Preferably, the detachable sealing plate is installed in the top of loading case grafting, and the camera is installed at the top of sealing plate, and the shooting end of camera runs through the sealing plate towards the detector body.

Preferably, solar cell panel is installed at the top of base, and solar cell panel's top one end is installed the rope fastening, solar cell panel and battery box electric connection.

Preferably, the driving mechanism comprises a driving spiral wheel, the bottom of the base and the bottom of the movable seat are both provided with a circulation groove along the length direction, the driving spiral wheel is rotatably installed in the circulation groove, a driving motor for driving the spiral wheel is installed on one side of the inside of the circulation groove, and the two ends of the circulation groove are both rotatably installed with baffles.

Preferably, the magnet board is installed with the junction that removes the seat in the both sides of base, and the bottom of magnet board is provided with accomodates the chamber, and the inside rotation of accomodating the chamber installs the winding axle, and the outside winding of winding axle is connected with the stay cord, the one end of stay cord with remove seat fixed connection, and the inside of base still installs the motor that is used for driving the winding axle, remove the seat and install the iron sheet towards the one end of base.

Preferably, the one end that the threaded section of thick bamboo was kept away from to the sampling tube is installed the check valve, and the direction of intaking of check valve is towards the inside of sampling tube, and the one end side that the threaded section of thick bamboo was kept away from to the sampling tube still is connected with electric telescopic handle, and electric telescopic handle's the flexible end of keeping away from the sampling tube is connected with the horizontal pole, and electric telescopic handle's one end rotation is kept away from to the horizontal pole is installed the impeller, and the impeller is in the tip of sampling tube water inlet.

The invention has the beneficial effects that:

1. through setting up a plurality of detection heads for after a certain position detects on the surface of water, the base removes to other positions on the surface of water, and after reacing the check point, the drive helical wheel that removes the seat bottom drives and removes the seat and remove and keep away from the base on the surface of water, and the removal of removing the seat can increase the scope that detects, can carry out the multiple spot to a waters simultaneously and detect, and the efficiency that detects improves, and can promote the accuracy of testing result.

2. The installation baffle is rotated through the bottom at base and removal seat for when base and removal seat removed, the baffle can be cleared up the impurity on the surface of water, avoids the impurity to cause the damage to drive helical wheel. If meet the obstacle that is difficult to the clearance, the baffle takes place to rotate after receiving great resistance, and the obstacle enters into the base and removes a bottom, and is pressed by the baffle, and the obstacle is pressed and is entered into the aquatic and can not influence the base and remove the normal removal of seat. And when the base and the movable seat move rapidly, the baffle rotates to be in an inclined state after being subjected to the resistance of water, so that the resistance can be reduced, and the energy consumption is further reduced.

3. Can the pivoted detect the head through the setting for rivers enter into the inside back of circulation groove, strike detecting the head, detect the head and receive to strike the back and take place to rotate, accomodate the inside in first loading chamber. And the first rotating shaft can be driven to rotate when the detection head rotates, and then the second rotating shaft rotates along with the first rotating shaft, so that the external sampling tubes rotate together, the sampling tube filled with the water sample below rotates upwards, the sampling tube empty at the upper part rotates downwards, and the sampling tube external to the second rotating shaft can be used sequentially. When the device is stationary for detection each time, the sampling tube below can extract a water sample at the detected position. Supply follow-up staff to detect the water sample once more or keep, improve subsequent detection diversity. When water got into the inside of sampling tube, strikeed the impeller, and then made water obtain the stirring, got into the inside water of sampling tube more diversified, can sample the material that contains in the aquatic on every side as far as. And electric telescopic handle can drive the impeller and reciprocate, stirs the water of below for the sample is abundant even more.

4. Through setting up the magnet board for a certain waters detects the back that finishes, and the winding axle rotates and twines the stay cord and accomodate, will remove the seat and pull back to the side of base, and the tip that removes the seat passes through iron sheet and magnet board bonding fixed, makes the base when removing, removes the seat and is more stable in the side, and difficult emergence is rocked. The movable seat can be moved for multiple times in one water area for detection, the detection precision is high, the range is wide, and manual sampling is not needed. After the detection is finished, the sampling tube is taken out by the staff, and the sampling tube is reserved for manual detection again.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure provided by the present invention.

Fig. 2 is a schematic view of the internal structure of the loading box according to the present invention.

Fig. 3 is an enlarged detail view of a in fig. 2 according to the present invention.

Fig. 4 is a schematic view of a bottom structure of the base provided by the present invention.

Fig. 5 is an enlarged detail structure diagram B in fig. 4 according to the present invention.

FIG. 6 is a schematic view of a sampling tube structure according to the present invention.

Fig. 7 is a schematic view of an installation structure of the first rotating shaft and the second rotating shaft according to the present invention.

Fig. 8 is a schematic view of a mounting structure of the stabilizing base and the push plate provided by the present invention.

In the figure: 1. a base; 2. a solar panel; 3. a baffle plate; 4. a movable seat; 5. a sealing plate; 6. a camera; 7. a rope fastener; 8. a loading bin; 9. a battery box; 10. a detector body; 11. a control box; 12. a magnet plate; 13. a winding shaft; 14. a receiving cavity; 15. pulling a rope; 16. a groove; 17. driving a helical wheel; 18. a first loading chamber; 19. a detection head; 20. a circulation tank; 21. a first rotating shaft; 22. a cover plate; 23. a threaded barrel; 24. a second rotating shaft; 25. a second loading chamber; 26. a sampling tube; 27. a one-way valve; 28. an electric telescopic rod; 29. a cross bar; 30. an impeller; 31. a stabilizing base; 32. a bump; 33. a limiting plate; 34. rotating the rod; 35. a push plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a water quality detector comprises a base 1 and a detector body 10 arranged above the base 1, wherein a loading box 8 is arranged at the top of the base 1, a battery box 9, the detector body 10 and a control box 11 are arranged in the loading box 8, movable moving seats 4 are arranged on two sides of the loading box 8, and the base 1 and the moving seats 4 are made of foam materials; the driving mechanism and the sampling mechanism are arranged on both sides of the bottom of the base 1 and one end of the bottom of the movable seat 4.

Sampling mechanism includes detects head 19 and sampling tube 26, and the bottom of base 1 and removal seat 4 and the installation department that detects head 19 are provided with first loading chamber 18, and the bottom of base 1 and removal seat 4 and the installation department of sampling tube 26 are provided with second loading chamber 25, detect head 19 and detector body 10 electric connection, and detect the first pivot 21 of the one end fixedly connected with of head 19, and first pivot 21 rotates and installs the inside at first loading chamber 18.

A second rotating shaft 24 is rotatably arranged in the second loading cavity 25, a plurality of threaded cylinders 23 are uniformly connected to the outer part of the second rotating shaft 24 along the circumferential direction, and a sampling tube 26 is connected to one end of each threaded cylinder 23 far away from the second rotating shaft 24 in a threaded manner; base 1 and the bottom of removing seat 4 load at first loading chamber 18 and second and be provided with the storage chamber between the chamber 25, apron 22 is installed to the bottom of storage chamber, the one end of first pivot 21 and second pivot 24 extends to the inside of storing the chamber, the diameter of first pivot 21 is less than the diameter of second pivot 24, return spring is installed with the first interior wall connection department that loads chamber 18 to the one end that second pivot 24 was kept away from to first pivot 21, other end outer wall connection has one to promote the subassembly, second pivot 24 all is connected with lug 32 in the bottom of every screw thread section of thick bamboo 23 towards the one end of first pivot 21, it can promote lug 32 to promote the subassembly.

As a technical optimization scheme of the invention, the pushing assembly comprises a stabilizing seat 31 and a push plate 35, the stabilizing seat 31 is fixedly connected with the outer wall of the first rotating shaft 21, a groove 16 is arranged at one end of the stabilizing seat 31 far away from the first rotating shaft 21, a limiting plate 33 is fixedly connected with one side in the groove 16, a rotating rod 34 is fixedly connected with the bottom of the push plate 35, the rotating rod 34 is rotatably arranged in the groove 16, a return spring is also arranged at the joint of the rotating rod 34 and the groove 16, both sides of the upper part of the push plate 35 are arranged in an arc shape, and the push plate 35 can be contacted with the bump 32.

As a technical optimization scheme of the invention, the top of the loading box 8 is provided with the detachable sealing plate 5 in an inserted manner, the top of the sealing plate 5 is provided with the camera 6, the shooting end of the camera 6 penetrates through the sealing plate 5 and faces the detector body 10, the camera 6 can record a video of the detector body 10, the working condition can be transmitted to the receiving end of the background in real time, a worker can monitor the working state of the detector body 10 in real time, accidents of the detector body 10 in use are avoided, and the safety of the detector body 10 is ensured.

As a technical optimization scheme of the invention, the solar cell panel 2 is installed at the top of the base 1, the rope buckle 7 is installed at one end of the top of the solar cell panel 2, and the solar cell panel 2 is electrically connected with the battery box 9.

As a technical optimization scheme of the invention, the driving mechanism comprises a driving spiral wheel 17, the bottoms of the base 1 and the moving seat 4 are both provided with a circulation groove 20 along the length direction, the driving spiral wheel 17 is rotatably installed in the circulation groove 20, a driving motor for driving the spiral wheel 17 is installed on one side in the circulation groove 20, two ends of the circulation groove 20 are both rotatably installed with the baffle 3, and the driving spiral wheel 17 drives the base 1 and the moving seat 4 to move.

As a technical optimization scheme of the invention, magnet plates 12 are mounted at the joints of two sides of a base 1 and a movable seat 4, a containing cavity 14 is arranged at the bottom of each magnet plate 12, a winding shaft 13 is rotatably mounted inside the containing cavity 14, a pull rope 15 is wound and connected outside the winding shaft 13, one end of the pull rope 15 is fixedly connected with the movable seat 4, a motor for driving the winding shaft 13 is further mounted inside the base 1, an iron sheet is mounted at one end of the movable seat 4 facing the base 1, and the winding shaft 13 can wind and contain the pull rope 15 and can pull the movable seat 4 to return to the side surface of the base 1.

As a technical optimization scheme of the invention, one end of the sampling tube 26, which is far away from the threaded cylinder 23, is provided with a one-way valve 27, the water inlet direction of the one-way valve 27 faces the interior of the sampling tube 26, the side surface of one end of the sampling tube 26, which is far away from the threaded cylinder 23, is also connected with an electric telescopic rod 28, the telescopic end of the electric telescopic rod 28, which is far away from the sampling tube 26, is connected with a cross rod 29, one end of the cross rod 29, which is far away from the electric telescopic rod 28, is rotatably provided with an impeller 30, the impeller 30 is positioned at the end part of the water inlet of the sampling tube 26, and the impeller 30 can stir water, so that the sampling diversity is improved.

When the water surface detector is used, the base 1 is placed on the water surface to be detected, the sealing plate 5 is clamped at the upper part of the loading box 8 to seal the loading box 8, and the water is prevented from entering the loading box 8 to damage the detector body 10. When the base 1 is static, the detection heads 19 at the bottoms of the base 1 and the movable seat 4 can acquire data in water, detection and analysis are carried out through the detector body 10, and finally the data detected are displayed on the detector body 10. The detected data can be transmitted to the background receiving end through the signal transmitting end in the control box 11 for the use of the staff. And the camera 6 can record a video of the detector body 10, so that the condition in work can be transmitted to a receiving end of a background in real time, a worker can monitor the working state of the detector body 10 in real time, accidents caused by the use of the detector body 10 are avoided, and the safety of the detector body 10 is ensured.

After the detection of a certain position on the water surface is finished, the spiral wheel 17 is driven to drive the base 1 to move to other positions on the water surface until the next detection point is reached. After reaching the detection point, the driving spiral wheel 17 at the bottom of the movable seat 4 drives the movable seat 4 to move on the water surface and to be far away from the base 1. When the movable seat 4 moves, the pull rope 15 is pulled out, the normal movement of the movable seat 4 is not affected, the movement of the movable seat 4 can increase the detection range, meanwhile, multipoint detection can be performed on a water area, the detection efficiency is improved, and the accuracy of the detection result can be improved.

When base 1 and removal seat 4 removed, baffle 3 can be with the impurity clearance on the surface of water, avoids impurity to cause the damage to drive helical wheel 17. In the moving process, if meet the obstacle that is difficult to clear up, take place to rotate after baffle 3 receives great resistance, the obstacle enters into base 1 and removes 4 bottoms of seat, and is pressed by baffle 3, and the obstacle is pressed and is entered into the normal removal that aquatic can not influence base 1 and removal seat 4. And when base 1 and removal seat 4 remove fast, take place to rotate after the baffle 3 receives the resistance of water and be the tilt state, can reduce the resistance, and then reduce the consumption of the energy.

The water flow enters the flow groove 20, and then strikes the detection head 19, and the detection head 19 is rotated after receiving the impact and is stored in the first loading chamber 18. And the detection head 19 can drive the first rotating shaft 21 to rotate when rotating, and the first rotating shaft 21 drives the stabilizing base 31 and the push plate 35 on the upper portion of the stabilizing base to rotate together after rotating. The push plate 35 contacts the bump 32 and pushes the bump 32, and the second shaft 24 rotates together with it, so that the outer sampling tube 26 rotates together, the sampling tube 26 filled with the water sample at the lower part rotates upward, and the sampling tube 26 empty at the upper part rotates downward. The range of one rotation of the detection head 19 is limited, so that the second rotation shaft 24 can only drive one sampling tube 26 to move at a time. So that the sampling tube 26 outside the second rotary shaft 24 can be used in turn. The lower sampling tube 26 can extract the water sample at the detected position every time the detection is carried out in a static state. Supply follow-up staff to detect the water sample once more or keep, improve subsequent detection diversity. When water got into the inside of sampling tube 26, strikeed impeller 30, and then made water obtain the stirring, got into the inside water of sampling tube 26 more diversified, can be as far as with the material that contains in the aquatic on every side sample. And electric telescopic handle 28 can drive impeller 30 and reciprocate, stirs the water of below for the sample is more abundant even. After the base 1 and the movable base 4 stop moving, the return spring drives the first rotating shaft 21 to rotate, so that the detection head 19 rotates to a vertical state for normal detection. The stable seat 31 and the push plate 35 rotate together with the first rotating shaft 21, and when the push plate 35 rotates backwards, the push plate 35 rotates around the rotating rod 34, can move away from the lower part of the bump 32, is not blocked by the bump 32, and returns to the original position, and then the push plate 35 keeps a vertical state for subsequent reuse.

After a certain water area is detected, the winding shaft 13 rotates to wind and store the pull rope 15, the movable seat 4 is pulled back to the side face of the base 1, and the end part of the movable seat 4 is fixedly bonded with the magnet plate 12 through the iron sheet, so that the movable seat 4 is more stable on the side face and is not easy to shake when the base 1 moves. The base 1 can carry out a lot of removal detection in a waters, and the precision that detects is high, and the scope is extensive, need not artifical sample. After the detection is finished, the worker takes out the sampling tube 26 and can perform manual detection again after reserving the sampling tube.

Before base 1 got into the aquatic, can be tied a safety rope on knot 7 for base 1 breaks down the back and can come back through the safety rope pulling, avoids whole detection device to take place to lose. In use, the solar cell panel 2 can supplement certain electric energy for the battery box 9, so that the endurance capacity is improved, and the working time is prolonged.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A water quality detector comprises a base (1) and a detector body (10) arranged above the base, and is characterized in that a loading box (8) is arranged at the top of the base (1), a battery box (9), the detector body (10) and a control box (11) are arranged in the loading box (8), movable moving seats (4) are arranged on two sides of the loading box (8), and the base (1) and the moving seats (4) are made of foam materials; both sides of the bottom of the base (1) and one end of the bottom of the movable seat (4) are provided with a driving mechanism and a sampling mechanism;

the sampling mechanism comprises a detection head (19) and a sampling tube (26), a first loading cavity (18) is formed in the mounting positions of the bottoms of the base (1) and the movable seat (4) and the detection head (19), a second loading cavity (25) is formed in the mounting positions of the bottoms of the base (1) and the movable seat (4) and the sampling tube (26), the detection head (19) is electrically connected with the detector body (10), a first rotating shaft (21) is fixedly connected to one end of the detection head (19), and the first rotating shaft (21) is rotatably mounted in the first loading cavity (18);

a second rotating shaft (24) is rotatably arranged in the second loading cavity (25), a plurality of threaded cylinders (23) are uniformly connected to the outer part of the second rotating shaft (24) along the circumferential direction, and one end, far away from the second rotating shaft (24), of each threaded cylinder (23) is in threaded connection with a sampling tube (26); base (1) and the bottom of removing seat (4) are provided with the storage chamber between first loading chamber (18) and second loading chamber (25), apron (22) are installed to the bottom of storage chamber, the one end of first pivot (21) and second pivot (24) extends to the inside of storage chamber, the diameter of first pivot (21) is less than the diameter of second pivot (24), return spring is installed with the interior wall connection department of first loading chamber (18) to the one end of second pivot (24) is kept away from in first pivot (21), other end outer wall connection has one to promote the subassembly, second pivot (24) all are connected with lug (32) in the bottom of every screw thread section of thick bamboo (23) towards the one end of first pivot (21), it can promote lug (32) to promote the subassembly.

2. A water quality detector according to claim 1, characterized in that, the promotion subassembly includes stable seat (31) and push pedal (35), the outer wall fixed connection of stable seat (31) and first pivot (21), the one end that first pivot (21) was kept away from in stable seat (31) is provided with recess (16), inside one side fixedly connected with limiting plate (33) of recess (16), and the bottom fixedly connected with dwang (34) of push pedal (35), dwang (34) rotate the inside of installing in recess (16), return spring is also installed with the junction of recess (16) in dwang (34), the upper portion both sides of push pedal (35) all are the arc setting, and push pedal (35) can contact with lug (32).

3. A water quality detector according to claim 1, wherein the top of the loading box (8) is provided with a detachable sealing plate (5) in an inserting way, the top of the sealing plate (5) is provided with a camera (6), and the shooting end of the camera (6) penetrates through the sealing plate (5) and faces the detector body (10).

4. A water quality detector according to claim 1, characterized in that a solar cell panel (2) is mounted on the top of the base (1), a rope fastener (7) is mounted at one end of the top of the solar cell panel (2), and the solar cell panel (2) is electrically connected with a battery box (9).

5. A water quality detector according to claim 1, wherein the driving mechanism comprises a driving spiral wheel (17), the bottom of the base (1) and the bottom of the movable seat (4) are both provided with a circulation groove (20) along the length direction, the driving spiral wheel (17) is rotatably installed inside the circulation groove (20), a driving motor for driving the spiral wheel (17) is installed on one side inside the circulation groove (20), and the two ends of the circulation groove (20) are both rotatably installed with the baffle (3).

6. A water quality detector according to claim 1, characterized in that a magnet plate (12) is mounted at the connection between the two sides of the base (1) and the movable base (4), a receiving cavity (14) is arranged at the bottom of the magnet plate (12), a winding shaft (13) is rotatably mounted inside the receiving cavity (14), a pull rope (15) is wound outside the winding shaft (13), one end of the pull rope (15) is fixedly connected with the movable base (4), a motor for driving the winding shaft (13) is further mounted inside the base (1), and an iron sheet is mounted at the end of the movable base (4) facing the base (1).

7. A water quality detector according to claim 1, wherein a check valve (27) is installed at one end of the sampling tube (26) far away from the threaded cylinder (23), the water inlet direction of the check valve (27) faces towards the inside of the sampling tube (26), an electric telescopic rod (28) is further connected to the side face of one end of the sampling tube (26) far away from the threaded cylinder (23), a cross rod (29) is connected to the telescopic end of the electric telescopic rod (28) far away from the sampling tube (26), an impeller (30) is rotatably installed at one end of the cross rod (29) far away from the electric telescopic rod (28), and the impeller (30) is located at the end of the water inlet of the sampling tube (26).