Optical water quality sensor

Abstract

The utility model relates to an optical water quality sensor which comprises a main body, a detection mechanism and a cleaning mechanism, the main body is provided with a detection groove, a first side wall of the detection groove is provided with a plurality of first windows, a second side wall of the detection groove is provided with a plurality of second windows, first lenses are embedded in the first windows, and second lenses are embedded in the second windows. The detection mechanism is arranged in the main body, the detection mechanism comprises a plurality of laser emitters and a plurality of laser detectors, and light emitted by the emitting ends of the laser emitters sequentially passes through the first lens, the detection groove and the second lens and then is received by the receiving ends of the laser detectors. The cleaning mechanism comprises a cleaning part and a driving part, the cleaning part is movably arranged in the detection groove, a first cleaning part of the cleaning part faces the first side wall, a second cleaning part faces the second side wall, the driving part is arranged in the main body, and the driving part drives the cleaning part to move and enables the first cleaning part to wipe the surfaces of the multiple first lenses; the second cleaning part wipes the surfaces of the plurality of second lenses.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to an optical water quality sensor. Background Art

[0002] Online water quality monitoring is a crucial tool for comprehensively understanding water resource quality and building systems for water resource protection and water environment management. Reagent-free optical water quality sensors are a crucial component of online water quality monitoring technology. They utilize diverse optical principles to accurately measure multiple parameters in water. These sensors offer immersive measurement, high sensitivity, rapid response, and long-term stability, making them widely used in environmental monitoring, industrial control, agricultural irrigation, drinking water safety, and scientific research.

[0003] Conventional reagent-free optical water quality sensors include a main body, a laser emitter, a laser detector, and a cleaning mechanism. The laser emitter and laser detector are both located within the main body, and the two form a detection light path through an optical window provided on the main body. The cleaning mechanism is used to clean pollutants and plankton attached to the optical window, ensuring the cleanliness of the optical window to maintain the optimal detection performance of the sensor. However, existing reagent-free optical water quality sensors are usually equipped with only one set of laser emitters and laser detectors. Accordingly, a set of optical windows corresponding to this set of laser emitters and laser detectors is provided on the main body. The detection data is derived only from this single detection light path. When the pollutants on this set of optical windows cannot be completely cleaned by the cleaning mechanism, the detection light path cannot be correctly transmitted and cannot accurately reflect the water quality conditions, resulting in a significant decrease in the accuracy and reliability of the detection. Utility Model Content

[0004] The purpose of the utility model is to provide an optical water quality sensor to solve the problem that conventional sensors are only equipped with a set of laser emitters and laser detectors, and the corresponding optical windows are contaminated, resulting in reduced detection accuracy.

[0005] In order to solve the above technical problems, the present utility model adopts the following technical solutions.

[0006] The utility model provides an optical water quality sensor, which includes: a main body, which is provided with a detection groove, and opposite side walls of the detection groove are respectively a first side wall and a second side wall, a plurality of first windows are provided on the first side wall, and a plurality of second windows are provided on the second side wall, a first lens is embedded in the first window, and a second lens is embedded in the second window; a detection mechanism is arranged in the main body, the detection mechanism includes a plurality of laser emitters and a plurality of laser detectors, and the light emitted by the emitting end of the laser emitter passes through the first lens, the detection groove and the second lens in sequence and is received by the receiving end of the laser detector; a cleaning mechanism includes a cleaning member and a driving member, the cleaning member is movably arranged in the detection groove, the cleaning member is provided with a first cleaning part and a second cleaning part, the first cleaning part faces the first side wall, and the second cleaning part faces the second side wall, the driving member is arranged in the main body, and the driving member drives the cleaning member to move and causes the first cleaning part to wipe the surfaces of the plurality of first lenses, and the second cleaning part to wipe the surfaces of the plurality of second lenses.

[0007] In some embodiments of the present application, the cleaning member is rotatably disposed in the detection slot; and the driving member is used to drive the cleaning member to rotate.

[0008] In some embodiments of the present application, the cleaning mechanism further includes a bracket and a transmission member; the bracket is provided with a connecting hole; the transmission member is connected to the rotating shaft of the driving member and locked in the connecting hole; the cleaning member is provided on the bracket.

[0009] In some embodiments of the present application, a first positioning hole is provided on the first side wall; a second positioning hole is provided on the second side wall; the transmission member passes through the first positioning hole, the connecting hole and the second positioning hole in sequence, and the transmission member is rotatably provided in the first positioning hole and the second positioning hole.

[0010] In some embodiments of the present application, the optical water quality sensor also includes a sealing mechanism, and the sealing structure is arranged in the main body; the sealing mechanism includes a first sealing ring, a first pressure ring, a second pressure ring and a second sealing ring, which are sequentially sleeved on the transmission member; the main body is provided with a first limiting portion and a second limiting portion; the first sealing ring is clamped between the first limiting portion and the first pressure ring, and the first sealing ring is fitted between the inner wall of the main body and the outer wall of the transmission member; the second sealing ring is clamped between the second limiting portion and the second pressure ring, and the second sealing ring is fitted between the inner wall of the main body and the outer wall of the transmission member; the first pressure ring and the second pressure ring enclose a sealed oil chamber, and the sealed oil chamber is filled with grease.

[0011] In some embodiments of the present application, the cleaning mechanism also includes a bracket; the bracket includes a first part, a second part and a third part connecting the first part and the second part; the cleaning member is clamped between the first part and the second part, and the first cleaning part and the second cleaning part both protrude outside the first part and the second part.

[0012] In some embodiments of the present application, the first part is provided with a first fixing hole; the second part is provided with a second fixing hole; the cleaning member is provided with a through hole; the cleaning mechanism further includes a fastener; and the fastener is locked in the fixing hole and the through hole.

[0013] In some embodiments of the present application, the main body includes a first cylinder, a second cylinder and a connecting seat connecting the first cylinder and the second cylinder; a first accommodating chamber is provided in the first cylinder, and one end of the first accommodating chamber has a first opening; a second accommodating chamber is provided in the second cylinder, and one end of the second accommodating chamber has a second opening; the laser emitter is provided in the first accommodating chamber, and the laser detector is provided in the second accommodating chamber; the connecting seat includes a first end cover, a second end cover and a pillar connecting the first end cover and the second end cover; the first end cover closes the first opening, and the second end cover closes the second opening; the detection slot is formed between the first end cover and the second end cover, and is provided on one side of the pillar.

[0014] In some embodiments of the present application, the cleaning member is made of silicone.

[0015] In some embodiments of the present application, the surfaces of the first cleaning portion and the surfaces of the second cleaning portion are both provided with drag reducing grooves; the extension direction of the drag reducing grooves and the wiping direction of the cleaning member are perpendicular to each other.

[0016] It can be seen from the above technical solutions that the embodiments of the present utility model have at least the following advantages and positive effects:

[0017] In the optical water quality sensor of the embodiment of the present utility model, when performing water quality detection, the laser emitter is started to emit a laser beam toward the first window. The laser beam passes through the first lens in the first window and enters the detection tank. The laser beam passes through the water body in the detection tank and interacts with the particles, dissolved substances, etc. in the water, causing changes in its optical properties. The laser beam passes through the second lens in the second window and is received by the receiving end of the laser detector. The water quality can be detected and analyzed based on the signal received by the laser detector.

[0018] During cleaning, since a plurality of first viewing windows are provided on the first side wall, first lenses are embedded in the first viewing windows, and a plurality of second viewing windows are provided on the second side wall, second lenses are embedded in the second viewing windows, the first cleaning portion of the cleaning member faces the first side wall, and the second cleaning portion faces the second side wall. When the driving member drives the cleaning member to move in the detection groove, the first cleaning portion can clean the attachments on the surfaces of the plurality of first lenses, and the second cleaning portion can clean the attachments on the surfaces of the plurality of second lenses, thereby reducing the detection error caused by the contamination of the lens surface by attachments.

[0019] Since there are multiple laser emitters, first windows, first lenses, second windows, second lenses and laser receivers respectively, multiple detection light paths can be formed. By fusing data from multiple detection light paths, more accurate water quality detection results can be obtained. Furthermore, even if the attachments on the lenses of one of the detection light paths cannot be completely cleaned by the cleaning component, the other detection light paths can still provide relatively accurate detection information. Compared with the case of only a single detection light path, the detection error can be reduced, and the detection accuracy and reliability can be improved.

[0020] On the other hand, since the cleaning part is arranged in the detection tank and the driving part is arranged in the main body, the overall built-in design of the cleaning mechanism can effectively reduce the size of the optical water quality sensor, making the overall structure of the optical water quality sensor more compact, able to be used in a narrow space, and have stronger adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The various objects, features, and advantages of the present invention will become more apparent upon consideration of the following detailed description of preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, like reference numerals denote identical or similar components.

[0022] Figure 1 FIG. 1 is a schematic structural diagram of an optical water quality sensor according to an exemplary embodiment.

[0023] Figure 2 yes Figure 1 sectional view of .

[0024] Figure 3 yes Figure 1 A cross-sectional view from another perspective.

[0025] Figure 4 yes Figure 2 A magnified schematic diagram of area A in the middle.

[0026] Figure 5 yes Figure 2 Schematic diagram of the cleaning mechanism in FIG.

[0027] Figure 6 yes Figure 4 Schematic diagram of the decomposition structure.

[0028] Figure 7 yes Figure 5 Schematic diagram of the structure of the cleaning part.

[0029] Figure 8 yes Figure 5 Schematic diagram of the structure of the middle bracket.

[0030] Figure 9 yes Figure 1 Schematic diagram of the decomposition structure of the subject in .

[0031] Figure 10 yes Figure 1 Schematic diagram of the decomposition structure of the subject from another perspective.

[0032] The accompanying drawings are described as follows: 1. Main body; 11. First cylinder; 111. First limiting portion; 112. Second limiting portion; 12. Second cylinder; 13. Connecting seat; 131. First end cover; 132. Second end cover; 133. Pillar; 14. Detection slot; 141. First side wall; 1411. First window; 1412. First positioning hole; 142. First lens; 143. Second side wall; 1431. Second window; 1432. Second positioning hole; 144. Second lens; 2. Detection mechanism; 21. Laser emitter; 22. Laser detector; 3. Clear Cleaning mechanism; 31. Cleaning member; 311. First cleaning part; 312. Second cleaning part; 313. Perforation; 314. Drag reduction groove; 32. Driving member; 33. Bracket; 331. First part; 3311. First fixing hole; 332. Second part; 3321. Second fixing hole; 333. Third part; 3331. Connecting hole; 3332. Locking hole; 34. Transmission member; 35. Fastener; 36. Locking member; 4. Sealing mechanism; 41. First sealing ring; 42. First pressure ring; 43. Second pressure ring; 44. Second sealing ring; 45. Sealing oil chamber. DETAILED DESCRIPTION

[0033] Although the present invention can be easily embodied as embodiments of different forms, only some of the specific embodiments are shown in the drawings and will be described in detail in this specification. It should be understood that this description should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to that described herein.

[0034] Thus, a feature indicated in this specification is intended to illustrate one of the features of one embodiment of the present invention, rather than implying that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other, not explicitly described, combinations. Thus, unless otherwise noted, the described combinations are not intended to be limiting.

[0035] In the embodiments shown in the accompanying drawings, directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of various components of the present invention are not absolute but relative. These descriptions are applicable when these components are in the positions shown in the accompanying drawings. If the descriptions of the positions of these components are changed, these directional indications will also change accordingly.

[0036] See also Figures 1 to 10 The optical water quality sensor provided by one embodiment of the present invention primarily comprises a main body 1, a detection mechanism 2, and a cleaning mechanism 3. The main body 1 defines a detection slot 14 having two opposing walls, a first sidewall 141 and a second sidewall 143. The first sidewall 141 defines a plurality of first viewing windows 1411, and the second sidewall 143 defines a plurality of second viewing windows 1431. The first windows 1411 are embedded with first lenses 142, and the second windows 1431 are embedded with second lenses 144. The detection mechanism 2 is disposed within the main body 1 and includes a plurality of laser emitters 21 and a plurality of laser detectors 22. Light emitted from the transmitting end of the laser emitters 21 sequentially passes through the first lens 142, the detection slot 14, and the second lens 144 before being received by the receiving end of the laser detectors. The cleaning mechanism 3 includes a cleaning member 31 and a driving member 32. The cleaning member 31 is movably arranged in the detection slot 14. The cleaning member 31 is provided with a first cleaning portion 311 and a second cleaning portion 312. The first cleaning portion 311 faces the first side wall 141, and the second cleaning portion 312 faces the second side wall 143. The driving member 32 is arranged in the main body 1. The driving member 32 drives the cleaning member 31 to move and causes the first cleaning portion 311 to wipe the surface of multiple first lenses 142, and the second cleaning portion 312 to wipe the surface of multiple second lenses 144.

[0037] It can be seen from the above technical solutions that the embodiments of the present utility model have at least the following advantages and positive effects:

[0038] In the optical water quality sensor of the embodiment of the present utility model, when performing water quality detection, the laser emitter 21 is started to emit a laser beam toward the first window 1411. The laser beam passes through the first lens 142 in the first window 1411 and enters the detection tank 14. The laser beam passes through the water body in the detection tank 14 and interacts with the particles, dissolved substances, etc. in the water, causing its optical properties to change. The laser beam passes through the second lens 144 in the second window 1431 and is received by the receiving end of the laser detector. The water quality can be detected and analyzed based on the signal received by the laser detector.

[0039] During cleaning, since a plurality of first windows 1411 are provided on the first side wall 141, the first windows 1411 are embedded with the first lenses 142, and a plurality of second windows 1431 are provided on the second side wall 143, the second windows 1431 are embedded with the second lenses 144, the first cleaning portion 311 of the cleaning member 31 faces the first side wall 141, and the second cleaning portion 312 faces the second side wall 143. When the driving member 32 drives the cleaning member 31 to move in the detection groove 14, the first cleaning portion 311 can clean the attachments on the surfaces of the plurality of first lenses 142, and the second cleaning portion 312 can clean the attachments on the surfaces of the plurality of second lenses 144, thereby reducing the detection error caused by the contamination of the lens surface by attachments.

[0040] Since the laser emitter 21, the first window 1411, the first lens 142, the second window 1431, the second lens 144 and the laser receiver are correspondingly provided in plurality, a plurality of detection light paths can be formed. By fusion of data from the plurality of detection light paths, a more accurate water quality detection result can be obtained. Furthermore, even if the attachments on the lens of one of the detection light paths cannot be completely cleaned by the cleaning member 31, the other detection light paths can still provide relatively accurate detection information. Compared with the case where there is only a single detection light path, the detection error can be reduced, and the accuracy and reliability of the detection can be improved.

[0041] On the other hand, since the cleaning member 31 is arranged in the detection groove 14 and the driving member 32 is arranged in the main body 1, the overall built-in design of the cleaning mechanism 3 can effectively reduce the size of the optical water quality sensor, making the overall structure of the optical water quality sensor more compact, able to be used in a narrow space, and have stronger adaptability.

[0042] The cleaning member 31 is rotatably disposed within the detection slot 14. The driving member 32 is used to drive the cleaning member 31 in rotation. The cleaning member 31 can rotate about the rotation axis of the driving member 32. As the cleaning member 31 rotates, it covers and cleans the lens. This is relatively easy to implement, and the driving member 32 can be stably retained within the main body 1. No redundant space is required within the main body 1 to accommodate the movement of the driving member 32, thereby further effectively reducing the size of the optical water quality sensor.

[0043] See also Figures 2 to 8 The cleaning mechanism 3 further includes a bracket 33 and a transmission member 34. The bracket 33 is provided with a connection hole 3331. The transmission member 34 is connected to the rotating shaft of the driving member 32 and locked in the connection hole 3331. The cleaning member 31 is mounted on the bracket 33. The bracket 33 provides support for the cleaning member 31, and the transmission member 34 ensures power transmission between the cleaning member 31 and the driving member 32. The coordinated operation of the bracket 33 and the transmission member 34 makes the rotation of the cleaning member 31 more stable and precise.

[0044] In this embodiment, the bracket 33 is also provided with a locking hole 3332, and the cleaning mechanism 3 also includes a locking member 36. The locking member 36 is in the locking hole 3332, and one end of the locking member 36 abuts against the transmission member 34. The cooperation between the locking member 36 and the locking hole 3332 enables the transmission member 34 to be stably locked in the connecting hole 3331.

[0045] See also Figure 2 、 Figure 9 and Figure 10 A first positioning hole 1412 is defined in the first side wall 141. A second positioning hole 1432 is defined in the second side wall 143. The transmission member 34 passes through the first positioning hole 1412, the connecting hole 3331, and the second positioning hole 1432 in sequence, and is rotatably disposed within the first positioning hole 1412 and the second positioning hole 1432. The design of the first positioning hole 1412 and the second positioning hole 1432 ensures that the transmission member 34 can accurately and stably drive the cleaning member 31 to rotate, thereby improving cleaning efficiency.

[0046] See also Figure 4 The optical water quality sensor also includes a sealing mechanism 4, and the sealing structure is arranged in the main body 1. The sealing mechanism 4 includes a first sealing ring 41, a first pressure ring 42, a second pressure ring 43 and a second sealing ring 44, which are sequentially sleeved on the transmission member 34. The main body 1 is provided with a first limiting portion 111 and a second limiting portion 112. The first sealing ring 41 is clamped between the first limiting portion 111 and the first pressure ring 42, and the first sealing ring 41 is attached between the inner wall of the main body 1 and the outer wall of the transmission member 34. The second sealing ring 44 is clamped between the second limiting portion 112 and the second pressure ring 43, and the second sealing ring 44 is attached between the inner wall of the main body 1 and the outer wall of the transmission member 34. The first pressure ring 42 and the second pressure ring 43 enclose a sealed oil chamber 45, and the sealed oil chamber 45 is filled with grease.

[0047] The first sealing ring 41 is deformed under the extrusion of the first limiting portion 111 and the first pressure ring 42 and fits tightly against the inner wall of the outer wall main body 1 of the transmission member 34. The second sealing ring 44 is deformed under the extrusion of the second limiting portion 112 and the second pressure ring 43 and fits tightly against the inner wall of the outer wall main body 1 of the transmission member 34, thereby improving the sealing performance. The first pressure ring 42 and the second pressure ring 43 enclose a sealing oil chamber 45, which is filled with grease to provide additional sealing. The design of the sealing mechanism 4 effectively prevents moisture and impurities from entering the interior of the main body 1, protects the components inside the main body 1, and improves the durability and stability of the optical water quality sensor. At the same time, the grease in the sealing oil chamber 45 can reduce the friction of the transmission member 34 and extend the service life of the cleaning mechanism 3.

[0048] See also Figures 5 to 8 The cleaning mechanism 3 also includes a bracket 33. The bracket 33 includes a first portion 331, a second portion 332, and a third portion 333 connecting the first portion 331 and the second portion 332. The cleaning member 31 is clamped between the first portion 331 and the second portion 332, and the first cleaning portion 311 and the second cleaning portion 312 both protrude outside the first portion 331 and the second portion 332. The first portion 331 and the second portion 332 ensure that the cleaning member 31 can be stably clamped and move synchronously under the drive of the bracket 33. Both the first cleaning surface and the cleaning surface can effectively contact and clean the lens, ensuring cleaning efficiency. In this embodiment, the driving member 32 drives the third portion 333 to move, and the connecting hole 3331 and the locking hole 3332 are both provided in the third portion 333.

[0049] The first portion 331 defines a first fixing hole 3311. The second portion 332 defines a second fixing hole 3321. The cleaning member 31 defines a through-hole 313. The cleaning mechanism 3 further includes a fastener 35. The fastener 35 locks within the fixing hole and through-hole 313. The coordination of the first fixing hole 3311, the second fixing hole 3321, the through-hole 313, and the fastener 35 improves the reliability of the connection between the cleaning member 31 and the bracket 33, preventing loosening or falling off during the cleaning process, thereby ensuring stability and continuity of the cleaning process.

[0050] See also Figure 9 and Figure 10The main body 1 includes a first cylinder 11, a second cylinder 12 and a connecting seat 13 connecting the first cylinder 11 and the second cylinder 12. A first accommodating chamber is provided in the first cylinder 11, and one end of the first accommodating chamber has a first opening. A second accommodating chamber is provided in the second cylinder 12, and one end of the second accommodating chamber has a second opening. The laser emitter 21 is provided in the first accommodating chamber, and the laser detector 22 is provided in the second accommodating chamber. The connecting seat 13 includes a first end cover 131, a second end cover 132 and a pillar 133 connecting the first end cover 131 and the second end cover 132. The first end cover 131 closes the first opening, and the second end cover 132 closes the second opening. The detection slot 14 is formed between the first end cover 131 and the second end cover 132, and is provided on one side of the pillar 133. The cooperation between the first cylinder 11, the second cylinder 12 and the connecting seat 13 ensures the stability and feasibility of the optical water quality sensor in the overall structure. In this embodiment, the first side wall 141 is disposed on the first end cover 131 , and the second side wall 143 is disposed on the second end cover 132 .

[0051] In the above embodiment, the surfaces of the first cleaning portion 311 and the second cleaning portion 312 are both provided with drag-reducing grooves 314. The drag-reducing grooves 314 extend perpendicularly to the wiping direction of the cleaning element 31. The provision of the drag-reducing grooves 314 helps capture and guide contaminants during the cleaning process, thereby improving the cleaning effect. Furthermore, the provision of the drag-reducing grooves 314 can reduce the friction experienced by the cleaning element 31 during movement, facilitating the selection of a smaller drive motor to drive the cleaning element 31, thereby saving costs and effectively reducing the size of the optical water quality sensor.

[0052] In the above embodiment, the cleaning member 31 is made of silicone. Silicone has good elasticity and wear resistance. The silicone cleaning member 31 can provide sufficient pressure during the cleaning process to ensure the cleaning effect while not easily damaging the lens surface.

[0053] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. An optical water quality sensor, characterized in that: include: The main body is provided with a detection slot, wherein opposite side walls of the detection slot are respectively a first side wall and a second side wall, the first side wall is provided with a plurality of first viewing windows, the second side wall is provided with a plurality of second viewing windows, the first windows are embedded with first lenses, and the second windows are embedded with second lenses; a detection mechanism disposed in the main body, the detection mechanism comprising a plurality of laser emitters and a plurality of laser detectors, wherein light emitted from the transmitting end of the laser emitter sequentially passes through the first lens, the detection slot, and the second lens and is received by the receiving end of the laser detector; The cleaning mechanism includes a cleaning member and a driving member. The cleaning member is movably arranged in the detection slot. The cleaning member is provided with a first cleaning portion and a second cleaning portion. The first cleaning portion faces the first side wall, and the second cleaning portion faces the second side wall. The driving member is arranged in the main body. The driving member drives the cleaning member to move and causes the first cleaning portion to wipe the surface of the plurality of first lenses, and the second cleaning portion to wipe the surface of the plurality of second lenses.

2. The optical water quality sensor according to claim 1, characterized in that The cleaning member is rotatably disposed in the detection tank; The driving member is used to drive the cleaning member to rotate.

3. The optical water quality sensor according to claim 2, characterized in that The cleaning mechanism also includes a bracket and a transmission member; The bracket is provided with a connecting hole; The transmission member is connected to the rotating shaft of the driving member and is locked in the connecting hole; The cleaning element is arranged on the bracket.

4. The optical water quality sensor according to claim 3, characterized in that A first positioning hole is formed on the first side wall; A second positioning hole is formed on the second side wall; The transmission member passes through the first positioning hole, the connecting hole and the second positioning hole in sequence, and the transmission member is rotatably arranged in the first positioning hole and the second positioning hole.

5. The optical water quality sensor according to claim 3, characterized in that: Also included is a sealing mechanism, wherein the sealing structure is disposed within the main body; The sealing mechanism comprises a first sealing ring, a first pressure ring, a second pressure ring and a second sealing ring which are sequentially sleeved on the transmission member; The main body is provided with a first limiting portion and a second limiting portion; The first sealing ring is sandwiched between the first limiting portion and the first pressure ring, and the first sealing ring is attached between the inner wall of the main body and the outer wall of the transmission member; The second sealing ring is sandwiched between the second limiting portion and the second pressure ring, and the second sealing ring is attached between the inner wall of the main body and the outer wall of the transmission member; The first pressure ring and the second pressure ring enclose a sealed oil cavity, and the sealed oil cavity is filled with grease.

6. The optical water quality sensor according to claim 1, characterized in that The cleaning mechanism further includes a bracket; The bracket includes a first portion, a second portion, and a third portion connecting the first portion and the second portion; The cleaning member is sandwiched between the first portion and the second portion, and the first cleaning portion and the second cleaning portion both protrude outside the first portion and the second portion.

7. The optical water quality sensor according to claim 6, characterized in that: The first portion is provided with a first fixing hole; The second portion is provided with a second fixing hole; The cleaning piece is provided with a perforation; The cleaning mechanism further includes a fastener; The fastener is locked in the fixing hole and the through hole.

8. The optical water quality sensor according to claim 1, characterized in that The main body includes a first cylinder, a second cylinder and a connecting seat connecting the first cylinder and the second cylinder; A first accommodating cavity is provided in the first cylinder, and one end of the first accommodating cavity has a first opening; A second accommodating cavity is provided in the second cylinder, and one end of the second accommodating cavity has a second opening; The laser emitter is disposed in the first accommodating cavity, and the laser detector is disposed in the second accommodating cavity; The connecting base includes a first end cover, a second end cover, and a support connecting the first end cover and the second end cover; The first end cap closes the first opening, and the second end cap closes the second opening; The detection slot is formed between the first end cover and the second end cover and is provided on one side of the pillar.

9. The optical water quality sensor according to claim 1, characterized in that: The cleaning piece is made of silica gel.

10. The optical water quality sensor according to claim 1, characterized in that The surfaces of the first cleaning portion and the second cleaning portion are both provided with drag reducing grooves; The extending direction of the drag reducing groove and the wiping direction of the cleaning member are perpendicular to each other.

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