River water quality detection device

Abstract

The invention discloses a riverway water quality detection device, and relates to the field of water quality detection, the riverway water quality detection device comprises a support and a base fixedly installed at the upper end of the support, the base is provided with an air pump, the air pump is communicated with a floating box through an air inlet pipe I, the floating box is installed on the support in an up-down sliding manner, and the floating box is fixedly connected with water quality detection equipment; a deflation valve is installed at the upper end of the buoyancy tank, and a first drainage valve is installed at the lower end of the buoyancy tank. The riverway water quality detection device has the beneficial effects that the water depth position of the water quality detection device is adjusted by changing the underwater buoyancy of the buoyancy box, and a conventional lifting mechanism such as a transmission belt or a screw is not adopted to adjust the height, so that the riverway water quality detection device is not influenced by an underwater complex environment, and normal underwater lifting of the riverway water quality detection device is not influenced even if garbage is wound; the reliability and the stability of the riverway water quality detection device are greatly improved, and the failure rate is low.

Description

Technical Field

[0001] The invention relates to the field of water quality detection, and in particular to a river water quality detection device. Background Art

[0002] At present, in order to detect water quality at different water depths, various lifting mechanisms are designed in the river water quality detection devices in the prior art to adjust the underwater position of the detection equipment, such as those shown in patents with publication numbers CN221424490U, CN221443738U, and CN221880981U. Although these river water quality detection devices have achieved the technical effect of detecting water quality at different water depths, they generally have the problem of insufficient reliability. After long-term use, the lifting mechanism will malfunction and fail to work. For example, the threaded rod in CN221424490U is underwater for a long time, and garbage and other debris in the river flow are easily entangled on the threaded rod. Over time, more entanglements will hinder the normal lifting of the lifting seat, causing the lifting mechanism to malfunction and fail to work; for example, the telescopic rod in CN221443738U will be stuck after being entangled by garbage, resulting in the telescopic rod not being able to extend and retract smoothly and malfunctioning; and if there are debris between the conveyor crawler and the rotating wheel in CN221880981U, the conveyor crawler and the rotating wheel will also be stuck, causing the lifting mechanism to malfunction and fail to work. Therefore, the above-mentioned lifting mechanisms generally have the problems of short underwater service life and insufficient reliability.

[0003] Although the patent with publication number CN209764848U records a technical solution of controlling the rise and fall of the probe in the water to reach a set water depth by introducing compressed gas from a gas tank into the balloon or discharging the gas in the balloon, this method is only applicable to marine environments and cannot be used in inland rivers. Because the river flow is turbulent, the probe will be washed away by the water flow and cannot stay stably in the water quality detection operation area directly below the pontoon, making it impossible to carry out water quality detection operations in the target waters. Summary of the invention

[0004] The main purpose of the present invention is to provide a river water quality detection device, aiming to solve the problem that the existing river water quality detection devices are not reliable and the underwater lifting mechanism is prone to failure.

[0005] In order to solve the above problems, the present invention proposes a river water quality detection device, including a bracket and a base fixedly installed on the upper end of the bracket, an air pump is arranged on the base, the air pump is connected to a float box through an air inlet pipe, the float box is slidably installed on the bracket up and down, the float box is fixedly connected with a water quality detection equipment, an air release valve is installed on the upper end of the float box, and a drain valve is installed on the lower end of the float box.

[0006] In one embodiment, a water depth detection device is installed on the buoyancy box.

[0007] In one embodiment, the lower end of the bracket can be plugged and fixedly connected to the riverbed, a slide is sleeved on the bracket, and the buoyancy box and the water quality detection equipment are fixedly connected to the slide.

[0008] In one embodiment, the slide is in a ring shape and is movably mounted on the bracket.

[0009] In one embodiment, a hood is detachably and sealably fixedly mounted on the base, a solar panel is disposed on the upper surface of the hood, a controller, a battery, a rotating shaft, a generator and the air pump are disposed inside the hood, one end of the rotating shaft extends out of the hood and is provided with a water wheel, the flow of river water drives the water wheel to rotate, the rotation of the water wheel drives the rotating shaft to rotate, the rotating shaft is transmission-connected to the generator, and the rotation of the rotating shaft drives the generator to generate electricity.

[0010] In one embodiment, the base is located above the water surface.

[0011] In one embodiment, a protective net frame is fixedly connected to the lower end of the base, the protective net frame is vertically arranged, the lower end of the protective net frame is sealed, the air intake pipe, the float box, and the water quality detection equipment are all located in the protective net frame and do not contact the protective net frame, and the lower end of the bracket extends out from the protective net frame.

[0012] In one embodiment, an air bag is provided on the lower surface of the base, and the air bag floats on the water surface. A base is provided on the lower surface of the air bag, and a lifting rope is suspended on the base. A plurality of threading rings are provided on the lifting rope at equal intervals. The lower end of the lifting rope is connected to a float. An air intake pipe 2 is connected to the interior of the float, and an air intake pipe 2 is connected to a control valve. The air pump and the air intake pipe 1 are both connected to the control valve. The air intake pipe 2 movably passes through the threading ring. A drain valve 2 is provided at the lower end of the float, and an attitude stabilizer is provided at the lower end of the drain valve 2.

[0013] In one embodiment, the float is hard.

[0014] Beneficial effects: The river water quality detection device of the present application adjusts the water depth position of the water quality detection equipment by changing the buoyancy of the float box underwater, and does not use conventional lifting mechanisms such as transmission belts or screws to adjust the height. Therefore, it is not affected by the complex underwater environment. Even if garbage is entangled, it will not affect its normal lifting and lowering underwater. It is very suitable for underwater use. Moreover, the presence of the bracket ensures that the float box will not be washed away by the water flow, which greatly improves the reliability and stability of the river water quality detection device and has a low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a river water quality detection device in Embodiment 1 of the present invention; Figure 2 It is a structural schematic diagram of a river water quality detection device in Embodiment 2 of the present invention; Figure 3 It is a structural schematic diagram of a river water quality detection device in Embodiment 3 of the present invention; Figure 4 It is a schematic diagram of the structure of the airbag of the present invention.

[0017] The following are the descriptions of the reference numerals: 1. Water surface; 2. Bracket; 3. Base; 4. Machine cover; 5. Solar panel; 6. Air pump; 7. Intake pipe 1; 8. Float; 9. Deflation valve; 10. Drain valve 1; 11. Water depth detection device; 12. Slide; 13. Water quality detection equipment; 14. Battery; 15. Water wheel; 16. Rotating shaft; 17. Generator; 18. Protective net frame; 19. Air bag; 20. Machine base; 21. Lifting rope; 22. Threading ring; 23. Intake pipe 2; 24. Float; 25. Drain valve 2; 26. Attitude stabilizer; 27. Control valve; 28. Controller; 29. ​​Water flow trough. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The present invention proposes a river water quality detection device, which adjusts the water depth position of the water quality detection equipment 13 by changing the buoyancy of the float box 8 underwater, and does not use conventional lifting mechanisms such as transmission belts or screws to adjust the height. Therefore, it is not affected by the complex underwater environment. Even if garbage is entangled, it will not affect its normal lifting and lowering underwater. It is very suitable for underwater use, which greatly improves the reliability and stability of the river water quality detection device and has a low failure rate. Embodiment 1:

[0023] In this embodiment, if Figure 1 As shown, the river water quality detection device includes a bracket 2 and a base 3 fixedly installed on the upper end of the bracket 2. The lower end of the bracket 2 can be plugged and fixedly connected to the riverbed, so that the river water quality detection device of this embodiment is fixed in the river to prevent it from being washed away by the water flow and leaving the target water area to affect the water quality detection. Figure 1As shown, an air pump 6 is arranged on the base 3, and the air pump 6 is connected to a buoyancy box 8 through an air inlet pipe 7. The buoyancy box 8 is hard in texture and light in weight. When the buoyancy box 8 is full of air, the buoyancy box 8 floats on the water surface 1. When water is injected into the buoyancy box 8, the buoyancy box 8 gradually sinks. Similarly, when air is injected into the buoyancy box 8 filled with water, the buoyancy box 8 gradually rises and finally floats out of the water surface 1. The buoyancy box 8 is slidably installed on the bracket 2 up and down. The buoyancy box 8 is fixedly connected to a water quality detection device 13. With this design, the buoyancy box 8 can move up and down in the water to drive the water quality detection device 13 to dive to different water depths for water quality detection.

[0024] Specifically, a slide 12 is provided on the bracket 2, and the float box 8 and the water quality detection equipment 13 are fixedly connected to the slide 12. Preferably, the slide 12 is in a circular ring shape and is looped on the bracket 2. With this design, even if garbage is entangled on the bracket 2, it will not affect the up and down movement of the slide 12. At this time, the purpose of setting the slide 12 looped on the bracket 2 is to limit the up and down movement of the slide 12, so that it can keep the vertical up and down movement as much as possible, and quickly move the water quality detection equipment 13 to the target water depth position.

[0025] In this embodiment, if Figure 1 As shown, an air release valve 9 is installed at the upper end of the buoyancy box 8, and a drainage valve 10 is installed at the lower end of the buoyancy box 8. The drainage valve 10 is opened, the air release valve 9 is closed, and then the air pump 6 is started to inject air into the buoyancy box 8 through the air inlet pipe 7. The air squeezes the water in the buoyancy box 8 out of the drainage valve 10. As the air in the buoyancy box 8 becomes more and more, and the water becomes less and less, the buoyancy box 8 gradually moves up along the bracket 2 and finally extends out of the water surface 1. Conversely, the air pump 6 is closed, the drainage valve 10 and the air release valve 9 are opened, and the gas in the buoyancy box 8 is discharged from the air release valve 9, and the external river water enters the buoyancy box 8 through the drainage valve 10. As the water in the buoyancy box 8 becomes more and more, the air becomes less and less. The less garbage there is, the buoyancy box 8 gradually sinks and finally slides to the lower end of the bracket 2. Therefore, the height of the water quality detection equipment 13 underwater can be adjusted by controlling the actions of the air pump 6, the drain valve 10 and the air release valve 9. Since the conventional lifting mechanism such as the transmission belt or the screw is not used to adjust the height, it is not affected by the complex underwater environment. Even if the garbage is entangled in the bracket 2 and the buoyancy box 8, it will not affect the normal lifting of the buoyancy box 8 underwater, which is very suitable for underwater use. In addition, the air pump 6, the drain valve 10, the air release valve 9 and the air inlet pipe 7 have stable performance, long service life and are not prone to failure. Therefore, the reliability and stability of the river water quality detection device are greatly improved, and the failure rate is low.

[0026] Further, such as Figure 1As shown, a water depth detection device 11 is installed on the pontoon 8, and the water depth detection device 11 detects the depth position of the pontoon 8 underwater, and then transmits the detection data to the controller 28, and finally the controller 28 wirelessly transmits the data information to the remote control center. Since wireless transmission of data information is common knowledge, this article will not elaborate on it.

[0027] Further, such as Figure 1 As shown, the base 3 is located above the water surface 1, and a hood 4 is detachably and sealedly fixedly installed on the base 3. A solar panel 5 is arranged on the upper surface of the hood 4, and electricity is generated by the solar panel 5 to charge the battery 14. A controller 28, a battery 14, a rotating shaft 16, a generator 17 and the air pump 6 are arranged in the hood 4. One end of the rotating shaft 16 extends out of the hood 4 and is installed with a water wheel 15. The flow of river water drives the water wheel 15 to rotate, and the rotation of the water wheel 15 drives the rotating shaft 16 to rotate. The rotating shaft 16 is transmission-connected with the generator 17, and the rotation of the rotating shaft 16 drives the generator 17 to generate electricity. The electricity generated by the generator 17 is stored in the battery 14. This design can make full use of the kinetic energy contained in the river water flow to generate electricity, make full use of solar energy to generate electricity, and supply the river water quality detection device with the generated electricity, effectively save electricity, reduce energy consumption, and comply with the green concept of sustainable development. The water wheel 15 can be made of lightweight materials, such as plastic, so that it can be more easily rotated under the impact of water flow. Embodiment 2:

[0028] This embodiment is a further improvement made on the basis of the first embodiment. In this embodiment, Figure 2 As shown, the lower end of the base 3 is fixedly connected with a protective net frame 18, the protective net frame 18 is vertically arranged, the lower end of the protective net frame 18 is sealed, the upper end of the protective net frame 18 is sealed and fixedly connected to the base 3, the air intake pipe 7, the float 8, and the water quality detection equipment 13 are all located in the protective net frame 18 and do not contact the protective net frame 18, and the lower end of the bracket 2 extends out from the protective net frame 18. With this design, the protective net frame 18 can protect the float 8 and the water quality detection equipment 13, so that they can work normally for a long time, and at the same time prevent external garbage from entangled and shielding the water quality detection equipment 13 from affecting its water quality detection operation. Embodiment three:

[0029] This embodiment is a further improvement made on the basis of the first or second embodiment. Figure 3As shown, an air bag 19 is provided on the lower surface of the base 3, and the air bag 19 floats on the water surface 1 after being inflated. The air bag 19 is flat after being inflated, and a base 20 is provided on the lower surface of the air bag 19. A suspension rope 21 is hung on the base 20, and a plurality of threading rings 22 are pasted on the suspension rope 21 at equal intervals. The threading rings 22 are used to limit the air inlet pipe 23 to prevent it from floating around and winding around the bracket 2, affecting the floating box 8 and the water quality detection equipment 13 from rising and falling along the bracket 2. The lower end of the suspension rope 21 is connected to a floating ball 24, and the floating ball 24 is hard and light. When the floating box 8 is filled with air, the floating box 8 floats on the water surface 1. When water is injected into the floating box 8, the floating box 8 gradually sinks. Similarly, when water is injected into the floating box 8, the floating box 8 gradually sinks. When air is injected into the full-water float box 8, the float box 8 gradually rises and eventually floats to the surface 1. The upper end of the float 24 is connected to the air inlet pipe 23, and the air inlet pipe 23 is connected to the control valve 27. The control valve 27 is located on the base 3. The air pump 6 and the air inlet pipe 1 7 are both connected to the control valve 27. The control valve 27 is a four-way valve. When the control valve 27 connects the air inlet pipe 23 and the air pump 6, the air pump 6 can inflate the float 24 through the air inlet pipe 23. When the control valve 27 connects the air inlet pipe 23 with the outside world, the air in the float 24 can be discharged through the control valve 27. When the control valve 27 connects the air inlet pipe 1 7 and the air pump 6, the air pump 6 can inject air into the float 8 through the air inlet pipe 1 7.

[0030] In this embodiment, the air inlet pipe 23 movably passes through the threading ring 22, and the air inlet pipe 23 is limited by multiple threading rings 22 to prevent it from floating around and winding around the bracket 2 to affect the floating box 8 and the water quality detection equipment 13 from rising and falling along the bracket 2. Figure 3 As shown, the lower end of the float 24 is provided with a drain valve 25, and the lower end of the drain valve 25 is provided with a posture stabilizer 26, which is used to keep the posture of the float 24 stable, so that the float 24 can maintain the posture when it rises and falls and moves horizontally underwater. Figure 3 The stable posture shown does not rotate, so it is easy to smoothly control the rise and fall of the float 24.

[0031] In this embodiment, when the river water quality detection device moves to a predetermined position in the river, the water quality detection operation can be carried out. At this time, if the river water flow is turbulent and the river water quality detection device cannot be stabilized in the predetermined position, the control valve 27 can be operated to connect the air inlet pipe 23 with the outside world, and the drain valve 25 can be opened at the same time. The river water enters the float 24 through the drain valve 25, and the float 24 gradually sinks and finally sinks to a relatively deep position. At this position, the float 24 can pull the machine base 20, the air bag 19, and the base 3 so that they are not carried away by the water flow, thereby stably staying in the predetermined position to carry out water quality detection operations. Of course, the float 24 can also be directly lowered to the riverbed.

[0032] In this embodiment, after the water quality detection is completed at a certain position in the river channel, when the river channel water quality detection device needs to be moved to other areas in the river channel for water quality detection, the control valve 27 is operated to control the connection between the air inlet pipe 23 and the air pump 6, and the air pump 6 inflates the float 24 through the air inlet pipe 23, and at the same time opens the drain valve 25, and the air injected into the float 24 squeezes the water in the float 24 out of the drain valve 25. As the air in the float 24 increases and the water decreases, the float 24 gradually rises and finally floats to the surface 1. Under normal circumstances, there is no need for the float 24 to float to the surface 1. When the float 24 rises underwater to a position close to the water surface 1, the river channel water quality detection device can move in the river channel with the water flow. After the river channel water quality detection device moves to the next predetermined working position, the above-mentioned operation can be repeated to stabilize the river channel water quality detection device in the river channel again, and then air is injected into the buoy 8 to adjust the underwater position of the water quality detection equipment 13 to perform water quality detection operations.

[0033] In this embodiment, the lower end of the bracket 2 is not plugged and fixedly connected to the riverbed.

[0034] Furthermore, in this embodiment, if Figure 4 The lower surface of the airbag 19 is provided with a plurality of straight-line water flow grooves 29, and the plurality of water flow grooves 29 are arranged at equal intervals, such as Figure 1 As shown, the river water flows through the airbag 19 from each water flow channel 29. With this design, the airbag 19 can be adjusted on the water surface 1 through the water flow channel 29, so that the water flow direction is tangent to the outer circumference of the water wheel 15, ensuring that the water wheel 15 can be driven to rotate and generate electricity smoothly for a long time. Specifically, Figure 1As shown, after the float 24 sinks to the bottom of the river channel, the float 24 pulls the machine base 20, the airbag 19, and the base 3 so as not to be carried away by the water flow, thereby stably staying at the predetermined position to carry out water quality detection operations. At this time, the airbag 19 floats on the water surface 1, and the water flow passes through the water flow trough 29, driving the airbag 19 floating on the water surface 1 to rotate around the vertical axis to adjust the orientation of the airbag 19 until the direction of the water flow in the water flow trough 29 is the same as the direction of the water flow in the river channel. Because when the direction of the water flow in the water flow trough 29 is different from the direction of the water flow in the river channel, the direction of the water flow in the river channel will be forced to change as soon as it enters the water flow trough 29, and the water flow impacts the trough wall of the water flow trough 29, driving the airbag 19 floating on the water surface 1 to rotate around the vertical axis to adjust the orientation of the airbag 19. The orientation of the airbag 19 is adjusted by rotating the straight axis until the direction of water flow in the water trough 29 is the same as the direction of water flow in the river channel. Then, under the joint action of the water flow and the water trough 29, the airbag 19 floating on the water surface 1 keeps the direction of water flow in the water trough 29 the same as the direction of water flow in the river channel. When the direction of water flow in the water trough 29 is the same as the direction of water flow in the river channel, the outer circumferential surface of the water wheel 15 is tangent to the direction of water flow, and the water flow can impact the water flow to the maximum extent, driving the water wheel 15 to rotate. Therefore, a plurality of straight water troughs 29 are arranged on the lower surface of the airbag 19, so that the airbag 19 floating on the water surface 1 can maintain a stable posture and orientation, so that the water flow can smoothly impact the water wheel 15 to rotate and generate electricity.

[0035] In this embodiment, the airbag 19 has a large volume and a large buoyancy. During the sinking or rising process of the float 24 and the raising and lowering process of the pontoon 8, the airbag 19 floats horizontally on the water surface 1 and will not be pulled and tilted by the float 24.

[0036] Among the river water quality detection devices of the above-mentioned three embodiments, the river water quality detection devices of embodiments one and two are suitable for being fixed in a river channel to conduct water quality detection at different water depths in a certain area, and the river water quality detection device of embodiment three is suitable for water quality detection at different water depths in multiple areas in a river channel.

[0037] In the above three embodiments of the river water quality detection device, the lower end of the bracket 2 of the river water quality detection device of the first and second embodiments is fixed on the riverbed of the river, and the generator 17 is driven to generate electricity by the impact of water flow on the water wheel 15.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A river water quality detection device, characterized in that: It includes a bracket and a base fixedly installed on the upper end of the bracket, an air pump is arranged on the base, the air pump is connected to a float box through an air inlet pipe, the float box is slidably installed on the bracket up and down, the float box is fixedly connected to a water quality detection device, an air release valve is installed on the upper end of the float box, and a drain valve is installed on the lower end of the float box.

2. A river water quality detection device as claimed in claim 1, characterized in that: A water depth detection device is installed on the buoyancy box.

3. A river water quality detection device as claimed in claim 1, characterized in that: The lower end of the bracket can be plugged and fixedly connected with the riverbed, a slide is sleeved on the bracket, and the buoyancy box and the water quality detection equipment are fixedly connected with the slide.

4. A river water quality detection device as claimed in claim 3, characterized in that: The slide is in the shape of a circular ring and is movably mounted on the bracket.

5. A river water quality detection device as claimed in claim 1, characterized in that: A hood is detachably and sealably fixedly mounted on the base, a solar panel is arranged on the upper surface of the hood, a controller, a battery, a rotating shaft, a generator and the air pump are arranged inside the hood, one end of the rotating shaft extends out of the hood and is equipped with a water wheel, the flow of river water drives the water wheel to rotate, the rotation of the water wheel drives the rotating shaft to rotate, the rotating shaft is transmission-connected to the generator, and the rotation of the rotating shaft drives the generator to generate electricity.

6. A river water quality detection device as claimed in claim 1, characterized in that: The base is located above the water surface.

7. A river water quality detection device as claimed in claim 1, characterized in that: The lower end of the base is fixedly connected to a protective net frame, the protective net frame is vertically arranged, the lower end of the protective net frame is sealed, the air intake pipe, the float box, and the water quality detection equipment are all located in the protective net frame and do not contact the protective net frame, and the lower end of the bracket extends out from the protective net frame.

8. A river water quality detection device as claimed in claim 1, characterized in that: An air bag is arranged on the lower surface of the base, and the air bag floats on the water surface. A machine base is arranged on the lower surface of the air bag, and a lifting rope is hung on the machine base. A plurality of threading rings are arranged on the lifting rope at equal intervals. The lower end of the lifting rope is connected to a float. An air intake pipe 2 is connected to the inside of the float, and an air intake pipe 2 is connected to a control valve. The air pump and the air intake pipe 1 are both connected to the control valve. The air intake pipe 2 movably passes through the threading ring. A drain valve 2 is arranged at the lower end of the float, and an attitude stabilizer is arranged at the lower end of the drain valve 2.

9. A river water quality detection device as claimed in claim 8, characterized in that: The float is hard.

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