Pretreatment equipment for water quality monitoring

Abstract

The invention relates to the technical field of water quality monitoring, and discloses pretreatment equipment for water quality monitoring, which comprises a buoy, a filter screen and a water quality sensor, the filter screen and the water quality sensor are respectively provided with a storage position stored above the water surface in the buoy and a detection position extending into water, the filter screen and the water quality sensor are driven to reciprocate between a storage position and a detection position; according to the invention, stretching-in and stretching-out of the filter screen and the water quality sensor are controlled, that is, reciprocating motion of the filter screen and the water quality sensor between the storage position and the detection position can prevent the filter screen and the water quality sensor from being soaked in water for a long time, so that breeding of organisms, bacteria and aquatic plants on the filter screen and the water quality sensor is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water quality monitoring, in particular to a pretreatment device for water quality monitoring. Background Art

[0002] In recent years, with the enhancement of national environmental awareness, water quality testing has become increasingly important. In order to understand the water quality of rivers in real time, my country has successively established water quality testing stations in various key rivers and lakes. The water stations detect the quality of the water environment and its pollution changes, providing important information for the protection, management and prevention of water pollution. However, the distance between large fixed water stations is far, which leads to a large distance between the separation points for collecting samples. Therefore, many monitoring devices installed on buoys are born, also known as floating water quality monitoring stations. Due to the high flow speed in river basins, the water flow will drive the sludge, aquatic plants and even domestic garbage in the rivers. Therefore, some pretreatment is required before sampling the water source. The pretreatment method of existing floating water quality monitoring stations generally installs a filter outside the sensor to reduce the impurities and garbage in the water body entering the filter by filtering.

[0003] For example, a patent with announcement number CN117092311B and announcement date January 26, 2024 discloses a water quality monitoring pretreatment device, which relates to the field of water quality monitoring technology, including a floating water quality monitoring station, a water quality monitoring sensor, a filter net, and a connecting frame, wherein the connecting frame is arranged on the floating water quality monitoring station, and the water quality monitoring sensor is connected to the floating water quality monitoring station by means of the connecting frame; a nozzle, wherein the nozzle is arranged in the filter net, and a design in which multiple spray holes are evenly and equidistantly opened on both sides of the nozzle is adopted; a pumping assembly, wherein the pumping assembly is arranged in the floating water quality monitoring station and is connected to the nozzle; a filtering assembly, wherein the filtering assembly is arranged in the floating water quality monitoring station and is connected to the pumping assembly, and the pumping assembly is used to pump water. The component extracts and filters water from the river through the filtering component, and uses a nozzle to spray water to flush the filter and the water quality monitoring sensor; the filtering component includes a filtering tank arranged in a floating water quality monitoring station, wherein a plurality of filter plates are arranged in the filtering tank, and the plurality of filter plates are designed with filter holes, and the sizes of the filter holes on the plurality of filter plates decrease successively; a water suction pipe and a water guide pipe are respectively arranged at both ends of the filtering tank, and one end of the water suction pipe passes through the floating water quality monitoring station and is located in the river water; the pumping component includes a water pump arranged on the floating water quality monitoring station, and a water inlet pipe and a water outlet pipe are arranged on the water pump, and the water outlet pipe is connected to the nozzle, and the water inlet pipe is conductively connected to the water guide pipe, and the water pump is started to filter the river water using the multi-layer filter plates.

[0004] In the prior art, the filter and the sensor are continuously immersed in water, as in the above-mentioned patent disclosure. Since a large number of microorganisms, bacteria and aquatic plants grow in the water, the fluidity of water in some outdoor waters is poor, and this situation is more common and serious. If the filter and the sensor are immersed in the water for a long time, the filter and the sensor themselves will become the growth carriers of microorganisms, bacteria and aquatic plants. In other words, the microorganisms, bacteria and aquatic plants will attach to the filter and the sensor. The long-term attachment will not only affect the monitoring of water quality, but also affect the service life of the filter and the sensor. Summary of the invention

[0005] The purpose of the present invention is to provide a pretreatment device for water quality monitoring to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pretreatment device for water quality monitoring, including a float, a filter and a water quality sensor, the filter and the water quality sensor both have a storage position above the water surface in the float and a detection position extending into the water, the filter and the water quality sensor are driven to move back and forth between the storage position and the detection position.

[0007] Preferably, the interior of the float is hollow and has a first chamber and a second chamber, and the filter screen and the water quality sensor are installed in the first chamber.

[0008] Preferably, a driving mechanism is installed in the first chamber, and the driving mechanism is used to drive the filter screen and the water quality sensor to rise and fall in the first chamber.

[0009] Preferably, a sleeve is installed at the bottom of the float, a water inlet is provided on the side of the sleeve, the filter screen and the water quality sensor are driven to descend into the sleeve, a water changing mechanism is installed in the sleeve, and the water changing mechanism is used to replace the water in the sleeve each time the filter screen and the water quality sensor descend.

[0010] Preferably, the water changing mechanism comprises a piston plate, which is fixedly connected to the bottom of the filter screen, and a hole is provided at the center of the piston plate, in which a one-way valve is installed.

[0011] Preferably, the piston plate has a first position and a second position. When the filter screen and the water quality sensor are both located inside the first chamber, the piston plate is in the first position. When the filter screen and the water quality sensor are completely lowered into the sleeve, the piston plate is in the second position and the piston plate is located at the bottom of the sleeve.

[0012] Preferably, a cleaning mechanism is also installed in the sleeve, and the cleaning mechanism is used to clean the filter surface of the filter screen when the filter screen rises.

[0013] Preferably, the cleaning mechanism includes a mounting ring and a brush, the mounting ring is mounted on the inner wall of the sleeve and is located above the water inlet, and the brush is fixedly mounted on the inner wall of the mounting ring.

[0014] Preferably, the filter holes on the filter net have two states. When the filter net is lowered, the filter holes are in an open state, and when the filter net is raised, the filter holes are in a closed state.

[0015] Preferably, the filter screen includes a first filter hole plate and a second filter hole plate, the first filter hole plate is sleeved on the inner wall of the second filter hole plate, the upper end of the first filter hole plate is fixedly connected to the driving mechanism, and the lower end is slidably connected to the second filter hole plate, and the lower end of the second filter hole plate is fixedly connected to the piston plate.

[0016] The beneficial effect of the present invention is that in the above technical scheme, the present invention can avoid the filter net and the water quality sensor from being immersed in water for a long time by controlling the extension and extension of the filter net and the water quality sensor, that is, the reciprocating movement of the filter net and the water quality sensor between the storage position and the detection position, thereby reducing the growth of organisms, bacteria and aquatic plants on the filter net and the water quality sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention;

[0019] Figure 2 An internal cross-sectional view provided for an embodiment of the present invention;

[0020] Figure 3 The embodiment of the present invention provides Figure 2 A in the enlarged view;

[0021] Figure 4 A cross-sectional view of a filter provided by an embodiment of the present invention;

[0022] Figure 5 The embodiment of the present invention provides Figure 4 Enlarged view of point B in .

[0023] Description of reference numerals:

[0024] 1. Float; 11. First chamber; 12. Second chamber; 2. Filter screen; 21. First filter hole plate; 22. Second filter hole plate; 23. Slider; 24. Slide; 3. Water quality sensor; 4. Driving mechanism; 5. Sleeve; 51. Water inlet; 52. Inner chamber; 53. Outer chamber; 6. Water changing mechanism; 61. Piston plate; 62. One-way valve; 7. Cleaning mechanism; 71. Mounting ring; 72. Brush. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-5 As shown, an embodiment of the present invention provides a pretreatment device for water quality monitoring, including a float 1, a filter 2 and a water quality sensor 3. The filter 2 and the water quality sensor 3 both have a storage position above the water surface in the float and a detection position extending into the water. The filter 2 and the water quality sensor 3 are driven to move back and forth between the storage position and the detection position.

[0028] Specifically, the interior of the float 1 is hollow and has a first chamber 11 and a second chamber 12. The filter screen 2 and the water quality sensor 3 are installed in the first chamber 11. The storage position is the position where the filter screen 2 and the water quality sensor 3 are located in the first chamber 11. The detection position is the position where the filter screen 2 and the water quality sensor 3 are driven to extend from the first chamber 11 and descend into the water. The water quality sensor 3 is a prior art and will not be described in detail. In the present embodiment, the filter screen 2 has a cylindrical hollow structure, and the water quality sensor 3 is covered inside the filter screen 2. The first chamber 11 has a cylindrical structure and is located at the center of the float 1. An opening is provided at the bottom of the first chamber 11 to enable the filter screen 2 and the water quality sensor 3 to extend and extend into the first chamber 11. The second chamber 12 is located on the periphery of the first chamber 11. It can be understood that the first chamber 11 is wrapped in the center of the second chamber 12. The first chamber 11 and the second chamber 12 are separated from each other. The second chamber 12 is a sealed chamber. The second chamber 12 is used to provide sufficient buoyancy for the float 1 and to arrange other components of the pretreatment equipment for water quality monitoring, such as the power supply part, the control part, etc. The second chamber 12 provides buoyancy so that the float 1 can float on the water surface. In other embodiments, a plurality of floats can be arranged on the side of the float 1, and the floats can be used to further improve the stability of the float 1 on the water surface. In actual use, the water quality sensor 3 and the filter 2 are initially located inside the first chamber 11, that is, the water quality sensor 3 and the filter 2 are initially The filter 2 is initially located above the water surface. When water quality detection is required, the filter 2 and the water quality sensor 3 are driven to descend in the first chamber 11 and extend into the water. Since the water quality sensor 3 is installed inside the filter 2, the filter 2 will filter out the water entering its interior as soon as it enters the water, and the water entering the filter 2 is the water to be detected. The water to be detected is pre-filtered by the setting of the filter 2 to prevent impurities and garbage in the water from affecting the detection of the water by the water quality sensor 3. The water monitoring of the water area can be achieved by detecting the water sample of the water area multiple times and with different water samples. The detected data can be transmitted to an external receiving station through a built-in wireless transmission unit. The wireless transmission unit is a prior art and will not be described in detail. After the water quality sensor 3 performs water body detection, the filter screen 2 and the water quality sensor 3 are driven to reset and rise into the first chamber 11, that is, the filter screen 2 and the water quality sensor 3 extend out of the water. By controlling the extension and extension of the filter screen 2 and the water quality sensor 3, that is, the reciprocating movement of the filter screen 2 and the water quality sensor 3 between the storage position and the detection position, the two can be prevented from being immersed in water for a long time, thereby avoiding the growth of organisms, bacteria and aquatic plants on the filter screen 2 and the water quality sensor 3. In other embodiments, a sterilization device such as an ultraviolet lamp can also be arranged in the first chamber 11 to disinfect the microorganisms and bacteria attached to the filter screen 2 and the water quality sensor 3 when the filter screen 2 and the water quality sensor 3 are retracted into the first chamber 11, thereby avoiding the growth of microorganisms and bacteria in the first chamber 11.

[0029] In an optional embodiment, further, a driving mechanism 4 is installed in the first chamber 11 , and the driving mechanism 4 is used to drive the filter screen 2 and the water quality sensor 3 to rise and fall in the first chamber 11 .

[0030] Specifically, the driving mechanism 4 is a linear driving mechanism 4 such as a cylinder or an electric push rod. In the present embodiment, the driving mechanism 4 is an electric push rod, which is vertically arranged in the first chamber 11. The fixed end of the electric push rod is fixed to the inner wall of the float 1, and the telescopic shaft at the output end is fixedly connected to the filter 2. A bracket is provided between the filter 2 and the electric push rod. The telescopic shaft at the output end of the electric push rod is fixedly connected to the filter 2 through the bracket, and the water quality sensor 3 is also fixedly connected to the bracket, so the water quality sensor 3 and the filter 2 can be raised and lowered synchronously, and the lifting and lowering control of the filter 2 and the water quality sensor 3 is realized by stretching and contracting the telescopic shaft at the output end of the electric push rod.

[0031] In the above embodiment, the water quality sensor 3 is driven to descend into the water by the driving mechanism 4 to detect the water body in the water area. That is to say, the water body contacted by the water quality sensor 3 is replaced by the free flow of the water body in the water area. When in some water areas with poor fluidity, the water quality sensor 3 will detect the same water body after multiple descents, that is, the detected water body is not replaced in time, thereby affecting the monitoring result of the water area. Therefore, in another embodiment of the present invention, further, a sleeve 5 is installed at the bottom of the buoy 1, and a water inlet 51 is provided on the side of the sleeve 5. The filter screen 2 and the water quality sensor 3 are driven to descend into the sleeve 5, and a water changing mechanism 6 is installed in the sleeve 5. The water changing mechanism 6 is used to replace the water body in the sleeve 5 each time the filter screen 2 and the water quality sensor 3 descend.

[0032] Specifically, the sleeve 5 is arranged vertically, and the central axis of the sleeve 5 is colinear with the central axis of the first chamber 11 and the central axis of the filter screen 2. The bottom of the sleeve 5 is open, the diameter of the filter screen 2 is smaller than the internal aperture of the sleeve 5, and the interior of the sleeve 5 is interconnected with the first chamber 11. In actual use, the water changing mechanism 6 discharges the water in the sleeve 5 from the bottom while the filter screen 2 descends, and the water in the water area is pumped into the sleeve 5. After the filter screen 2 descends into the sleeve 5, the filter screen 2 filters the new water in the sleeve 5 again, and the water filtered into the filter screen 2 contacts the descending water quality sensor 3. By replacing the water in the sleeve 5, the problem of the water quality sensor 3 detecting the same water multiple times is avoided.

[0033] In another embodiment of the present invention, further, the water changing mechanism 6 includes a piston plate 61, the piston plate 61 is fixedly connected to the bottom of the filter screen 2, a hole is opened at the center of the piston plate 61, and a one-way valve 62 is installed in the hole.

[0034] Specifically, the piston plate 61 is horizontally arranged in the sleeve 5, and is preferably dynamically sealed and connected to the inner wall of the sleeve 5. The central axis of the piston plate 61 is colinear with the central axis of the sleeve 5. In this embodiment, the filter screen 2 is a mesh filter screen, which can be understood as a cylindrical plate structure with filter holes, so the filter screen 2 does not bend during the process of driving the piston plate 61 to rise and fall. The piston plate 61 has a first position and a second position. When the filter screen 2 and the water quality sensor 3 are both located inside the first chamber 11, the piston plate 61 is in the first position. Position, the first position is the position where the piston plate 61 is flush with the water inlet 51 on the sleeve 5, when the filter screen 2 and the water quality sensor 3 are completely lowered into the sleeve 5, the piston plate 61 is in the second position, the piston plate 61 is located at the bottom of the sleeve 5, and a one-way valve 62 is installed at the center of the piston plate 61. The one-way valve 62 only allows the water above the piston plate 61 to flow below it, and prohibits the water below the piston plate 61 from flowing above it, that is, the one-way valve 62 is in an open state during the rising process of the piston plate 61, and is in a closed state when it is descending;

[0035] During actual use, the driving mechanism 4 drives the filter screen 2 and the water quality sensor 3 to descend from the first chamber 11 into the sleeve 5, and the piston plate 61 is initially in the first position. The descent of the filter screen 2 drives the piston plate 61 to descend synchronously. When the piston plate 61 descends, the one-way valve 62 is in a closed state. Therefore, the descent of the piston plate 61 will squeeze the water below it, that is, the water in the sleeve 5 is discharged from its bottom. At the same time, the descent of the piston plate 61 causes new water to be passively drawn in from the water inlet 51. The new water is located above the piston plate 61, that is, it contacts the filter screen 2. The water is filtered by the filter screen 2 and enters the inside of the filter screen 2. When the filter screen 2 and the water quality sensor 3 are completely descended into the sleeve 5, the piston plate 61 is in the second position, and the water quality sensor 3 contacts the water in the filter screen 2 to realize the detection of different water bodies in the water area.

[0036] After the detection, the driving mechanism 4 drives the filter screen 2 and the water quality sensor 3 to reset and rise, and drives the piston plate 61 to rise synchronously. The one-way valve 62 is in an open state at this time, and the water inlet 51 also drains water synchronously at this time. Because the piston plate 61 rises relatively slowly, the rise of the piston plate 61 will not drive the water above it to rise. That is to say, during the rising process of the piston plate 61, the water body in the sleeve 5 remains unchanged until the piston resets and rises to the first position and stops. The filter screen 2 and the water quality sensor 3 extend out of the water and reset and retract into the first chamber 11. At this time, the piston plate 61 acts as a closing plate to close the lower opening of the first chamber 11.

[0037] In another embodiment of the present invention, further, a cleaning mechanism 7 is installed in the sleeve 5, and the cleaning mechanism 7 is used to clean the filter surface of the filter screen 2 when the filter screen 2 rises.

[0038] Specifically, the filtering surface of the filter 2 is the outer surface of the filter 2. The cleaning mechanism 7 includes a mounting ring 71 and a brush 72. The mounting ring 71 is mounted on the inner wall of the sleeve 5 and is located above the water inlet 51. The brush 72 is fixedly mounted on the inner wall of the mounting ring 71. The central axis of the mounting ring 71 is colinear with the central axis of the sleeve 5. When the driving mechanism 4 drives the filter 2 to reset and rise, the outer surface of the filter 2, that is, the filtering surface, will contact the brush 72. The relative movement between the filter 2 and the brush 72 is used to clean the filtering surface of the filter 2, thereby preventing some impurities and garbage from adhering to the surface of the filter 2. It should be supplemented that In the present embodiment, the mounting ring 71 is fixedly mounted on the inner wall of the sleeve 5. In other embodiments, a driving member may be provided to drive the mounting ring 71 to rotate, that is, the mounting ring 71 rotates on its own. The rotation of the mounting ring 71 drives the brush 72 to rotate, and the rotation of the brush 72 improves the cleaning effect of the filtering surface of the filter screen 2. The self-rotation of the mounting ring 71 driven by the driving member is a prior art and will not be described in detail. In addition, the first position of the piston plate 61 is located below the mounting ring 71. When the piston plate 61 is in the first position, the piston plate 61 is attached to the lower surface of the mounting ring 71, so the setting of the mounting ring 71 does not affect the rise of the piston plate 61.

[0039] In another embodiment of the present invention, further, the filter holes on the filter screen 2 have two states. When the filter screen 2 descends, the filter holes are in an open state, and when the filter screen 2 ascends, the filter holes are in a closed state.

[0040] Specifically, when the filter screen 2 is located inside the sleeve 5, the filter screen 2 divides the interior of the sleeve 5 into an inner chamber 52 and an outer chamber 53, the inner chamber 52 is located inside the filter screen 2, the outer chamber 53 is located between the outer wall of the filter screen 2 and the inner wall of the sleeve 5, the cleaning mechanism 7 is located in the outer chamber 53 and is immersed in water, the descending stroke of the filter screen 2 is recorded as the first stroke, and the ascending stroke of the filter screen 2 is recorded as the second stroke;

[0041] In the first stroke, the piston plate 61 is initially located at the first position, and the descending of the filter screen 2 squeezes and drives the piston plate 61 to descend in the sleeve 5. At this time, the filter holes on the filter screen 2 are in an open state, and the piston plate 61 descends to suck the external water into the sleeve 5. At this time, the outer chamber 53 is connected to the inner chamber 52 through the filter holes, and the filter screen 2 can play a normal filtering role, that is, the water entering the inner chamber 52 from the outer chamber 53 can be smoothly filtered, until the filter screen 2 and the water quality sensor 3 completely enter the sleeve 5, the piston plate 61 descends to the second position, and the first stroke ends. The complete entry here only means that most of the filter screen 2 enters the water, but the upper end of the filter screen 2 is still above the water.

[0042] In the second stroke, when the driving mechanism 4 drives the filter screen 2 to reset and rise, the piston plate 61 of the rising belt of the filter screen 2 rises synchronously. At this time, the filter holes on the filter screen 2 are in a closed state, that is, the inner chamber 52 and the outer chamber 53 are separated by the filter screen 2. When the filter screen 2 rises and is cleaned by the brush 72 in the outer chamber 53, the sewage generated by the cleaning will not flow into the inner chamber 52. In other words, the fine impurities in the sewage will not enter the inner chamber 52 and adhere to the inner wall of the filter screen 2, thereby avoiding the problem that the inner wall of the filter screen 2 is difficult to clean.

[0043] And the sewage generated by cleaning will be directly sent out from the water inlet 51 as the piston plate 61 rises. Although the one-way valve 62 is in an open state during this stroke, the one-way valve 62 is located in the inner cavity and will not affect the spatial compression of the outer chamber 53 by the piston plate 61. It can be understood that the plate body of the piston plate 61 blocks the bottom opening of the outer chamber 53, and as the piston plate 61 rises, it pushes the water in the outer chamber 53 to move from bottom to top, and can also squeeze the sewage generated by cleaning the filter screen 2 in the outer chamber 53 from the water inlet 51, and realize the continuous replacement of the water body near the brush 72, so that the brush 72 is immersed in water and the filter screen 2 is cleaned in a manner similar to flushing, thereby avoiding the sewage generated by cleaning the filter screen 2 always being near the brush 72, resulting in incomplete cleaning.

[0044] Furthermore, the filter screen 2 includes a first filter hole plate 21 and a second filter hole plate 22, the first filter hole plate 21 is sleeved on the inner wall of the second filter hole plate 22, the upper end of the first filter hole plate 21 is fixedly connected to the driving mechanism 4, and the lower end is slidably connected to the second filter hole plate 22, and the lower end of the second filter hole plate 22 is fixedly connected to the piston plate 61.

[0045] Specifically, the upper end of the first filter hole plate 21 is fixedly connected to the telescopic shaft at the output end of the electric push rod through a bracket. The first filter hole plate 21 and the second filter hole plate 22 are both cylindrical structures, and the meshes on the two correspond to each other. The meshes are the filter holes in the above embodiment. The inner wall of the first filter hole plate 21 is provided with a slider 23, and the outer wall of the second filter hole plate 22 is provided with a slide groove 24. The slider 23 is located in the slide groove 24 and forms a sliding guide with the slide groove 24. The groove direction of the slide groove 24 is consistent with the axial direction of the sleeve 5.

[0046] In the first stroke, initially, the piston plate 61 is in the first position, the slider 23 is located at the lower end of the slide groove 24, and the driving mechanism 4 drives the first filter hole plate 21 to descend. At this time, the slider 23 is resisted by the lower end of the slide groove 24, and the second filter hole plate 22 follows the first filter hole plate 21 to descend synchronously, and the piston plate 61 also follows the synchronous decline. At this time, the mesh holes of the first filter hole plate 21 and the mesh holes of the second filter hole plate 22 are interconnected, that is, the inner chamber 52 and the outer chamber 53 are interconnected through the mesh holes, until the piston plate 61 descends to the bottom of the sleeve 5, that is, the second position, and the first filter hole plate 21, the second filter hole plate 22 and the water quality sensor 3 are completely inside the sleeve 5, and the first stroke ends;

[0047] In the second stroke, the driving mechanism 4 drives the first filter hole plate 21 to rise. Because the piston plate 61 and the inner wall of the sleeve 5 have a certain friction force and the action of gravity, the first filter hole plate 21 will be driven to rise first in the initial stage of the stroke, and the second filter hole plate 22 remains stationary under the restriction of the piston plate 61. At this time, the slider 23 on the inner wall of the first filter hole plate 21 slides in the slide groove 24 on the outer wall of the second filter hole plate 22, and slides from the lower end of the slide groove 24 to the upper end. At the same time, the first filter hole plate 21 and the second filter hole plate 22 move relative to each other, and the first filter hole plate 21 and the second filter hole plate 22 are staggered with each other. After the movement, the mesh holes on the first filter hole plate 21 are no longer connected to the mesh holes on the second filter hole plate 22. One end opening of the mesh holes on the first filter hole plate 21 is blocked by the plate body of the second filter screen 2, so when the piston plate 6 1, the switch control of the mesh is also realized. At this time, the outer chamber 53 is isolated from the inner chamber 52. After the slider 23 moves to the upper end of the slide groove 24, the slider 23 cannot continue to move. Therefore, when the first filter hole plate 21 continues to rise, it will pull the second filter hole plate 22 and the piston plate 61 to rise synchronously through the slider 23. Because the outer chamber 53 is isolated from the inner chamber 52, the sewage generated by the brush 72 cleaning the surface of the first filter hole plate 21 when it rises cannot enter the inner chamber 52, and the impurities in the sewage cannot adhere to the inner wall of the second filter hole plate 22. In addition, as the piston plate 61 rises, the water in the outer chamber 53 is driven from bottom to top, and the water near the brush 72 is replaced. The sewage can be directly discharged from the water inlet 51, thereby improving the cleaning effect of the first filter hole plate 21.

[0048] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pretreatment device for water quality monitoring, comprising a float (1), a filter (2) and a water quality sensor (3), characterized in that: The filter net (2) and the water quality sensor (3) both have a storage position stored in the buoy above the water surface and a detection position extending into the water. The filter net (2) and the water quality sensor (3) are driven to move back and forth between the storage position and the detection position.

2. A water quality monitoring pretreatment device according to claim 1, characterized in that: The interior of the float (1) is hollow and is provided with a first chamber (11) and a second chamber (12); the filter screen (2) and the water quality sensor (3) are installed in the first chamber (11).

3. A water quality monitoring pretreatment device according to claim 2, characterized in that: A driving mechanism (4) is installed in the first chamber (11), and the driving mechanism (4) is used to drive the filter screen (2) and the water quality sensor (3) to rise and fall in the first chamber (11).

4. A water quality monitoring pretreatment device according to claim 3, characterized in that: A sleeve (5) is installed at the bottom of the buoy (1), a water inlet (51) is provided on the side of the sleeve (5), the filter screen (2) and the water quality sensor (3) are driven to descend into the sleeve (5), a water changing mechanism (6) is installed in the sleeve (5), and the water changing mechanism (6) is used to replace the water in the sleeve (5) each time the filter screen (2) and the water quality sensor (3) descend.

5. A water quality monitoring pretreatment device according to claim 4, characterized in that: The water exchange mechanism (6) comprises a piston plate (61), the piston plate (61) is fixedly connected to the bottom of the filter screen (2), a hole is provided at the center of the piston plate (61), and a one-way valve (62) is installed in the hole.

6. A water quality monitoring pretreatment device according to claim 5, characterized in that: The piston plate (61) has a first position and a second position. When the filter screen (2) and the water quality sensor (3) are both located inside the first chamber (11), the piston plate (61) is in the first position. When the filter screen (2) and the water quality sensor (3) are completely lowered into the sleeve (5), the piston plate (61) is in the second position, and the piston plate (61) is located at the bottom of the sleeve (5).

7. A water quality monitoring pretreatment device according to claim 1, characterized in that: A cleaning mechanism (7) is also installed in the sleeve (5), and the cleaning mechanism (7) is used to clean the filtering surface of the filter screen (2) when the filter screen (2) rises.

8. A water quality monitoring pretreatment device according to claim 7, characterized in that: The cleaning mechanism (7) comprises a mounting ring (71) and a brush (72); the mounting ring (71) is mounted on the inner wall of the sleeve (5) and is located above the water inlet (51); and the brush (72) is fixedly mounted on the inner wall of the mounting ring (71).

9. A water quality monitoring pretreatment device according to claim 5, characterized in that: The filter holes on the filter net (2) have two states: when the filter net (2) descends, the filter holes are in an open state; and when the filter net (2) ascends, the filter holes are in a closed state.

10. A pretreatment device for water quality monitoring according to claim 9, characterized in that: The filter screen (2) comprises a first filter hole plate (21) and a second filter hole plate (22); the first filter hole plate (21) is sleeved on the inner wall of the second filter hole plate (22); the upper end of the first filter hole plate (21) is fixedly connected to the driving mechanism (4); the lower end of the first filter hole plate (21) is slidably connected to the second filter hole plate (22); the lower end of the second filter hole plate (22) is fixedly connected to the piston plate (61).

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