Pipeline type photoelectric liquid level sensor

Abstract

The invention relates to the technical field of photoelectric liquid level sensors, and particularly discloses a pipeline type photoelectric liquid level sensor which comprises a shell, a PCBA board is installed at the bottom end of the inner side of the shell, a shell cover is connected to the front side of the shell in a clamped mode, a shock pad is fixedly connected to the rear side of the shell cover, and the rear side of the shock pad is attached to the front side of the PCBA board. By the adoption of the structure, when the angle of the pipeline body needs to be adjusted, a user can directly rotate the shell through the rotating shaft, the rear side of the shell can be secondarily supported and limited through the sliding grooves and the sliding blocks of the shell while the angle adjustment of the shell is not hindered, and the stability of angle adjustment of the shell can be effectively improved; after the angle of the pipeline body is adjusted, the pipeline body can be prevented from displacing through mutual attraction of the magnet and the iron ring, so that the purpose of conveniently adjusting the angle of the pipeline body can be achieved, and meanwhile, the accuracy of pipeline data needing to be detected can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of photoelectric liquid level sensors, in particular to a pipeline type photoelectric liquid level sensor. Background Art

[0002] The pipeline photoelectric liquid level sensor is a device that uses optical principles to detect liquid levels. It is mainly composed of a transmitting probe, a receiving probe and an optical system. It can monitor the liquid level changes of the fluid in the pipeline in real time. The sensor has the advantages of no mechanical movement, long life, easy installation, and low power consumption. At the same time, it solves the problems of traditional mechanical and capacitive sensors, such as low precision, stuck failure and uncontrollable failure caused by sensitivity attenuation. It is widely used in water shortage or full water detection of equipment such as sweeping robots, scrubbers, mops, water dispensers, humidifiers, etc.

[0003] A Chinese patent with announcement number "CN218035252U" discloses a pipeline photoelectric liquid level sensor, including a shell structure, a PCBA board and a pipeline structure. The shell structure is provided with an installation cavity, and a light emitter and a light receiver are provided on the bottom surface of the PCBA board, and they are arranged in the installation cavity of the shell structure. The light emitting direction of the light emitter and the light incident direction of the light receiver are both perpendicular to the inner wall corresponding to the installation cavity. The pipeline structure and the shell structure are integrally formed with a light-transmitting material, and a prism structure integrally formed therewith is provided on the inner wall of the pipeline structure.

[0004] However, this sensor still has some shortcomings. When the pipeline structure is connected to the pipeline that needs to be detected, the pipeline structure will be located on the inner side of the pipeline that needs to be detected, and there will be a small gap between the two. Because the outer shell structure does not have the function of angle adjustment, if the pipeline structure shifts its angle during detection, the angle detected by the pipeline structure will also change accordingly, thereby reducing the accuracy of the pipeline structure for the pipeline data that needs to be detected. Summary of the invention

[0005] The object of the present invention is to provide a pipeline photoelectric liquid level sensor to solve the problem in the above background technology that the shell structure is not easy to adjust the angle, thereby reducing the detection accuracy.

[0006] To achieve the above-mentioned purpose, the present invention provides a pipeline photoelectric liquid level sensor, comprising a shell, a PCBA board is installed at the inner bottom end of the shell, a shell cover is clamped on the front side of the shell, a shock-absorbing pad is fixedly connected to the rear side of the shell cover, the rear side of the shock-absorbing pad is attached to the front side of the PCBA board, an electronic wire is installed at the bottom end of the PCBA board, a controller is installed at the bottom end of the electronic wire, a connecting plate is clamped on the bottom ends of the shell and the shell cover, a limiting hole matching the electronic wire is provided at the bottom end of the connecting plate, the electronic wire is located on the inner side of the limiting hole, a rotating shaft is rotatably connected to the rear side of the shell, a circular plate is fixedly connected to the rear side of the rotating shaft, a slider is fixedly connected to the front side of the circular plate, a slide groove matching the slider is provided on the rear side of the shell, the shape of the slide groove is circular, the slider is slidably connected to the inner side of the slide groove, a magnet is fixedly connected to the rear side of the shell, an iron ring matching the magnet is fixedly connected to the front side of the circular plate, and the position of the iron ring matches the magnet. The positions are relatively symmetrical, a sleeve rod is fixedly connected to the rear side of the circular plate, a movable rod is sleeved on the inner side of the sleeve rod, a mounting plate is fixedly connected to the rear side of the movable rod, a positioning hole is opened on the rear side of the mounting plate, a circular groove is opened on the rear side of the mounting plate, a rubber pad is fixedly connected to the inner side of the circular groove, the rubber pad covers the inner side of the circular groove, a pipe body is installed on the rear side of the shell, the positioning hole is opened, so as to facilitate the fixation of the position of the mounting plate, the mounting plate can effectively support the position of the shell, the movable rod and the sleeve rod can facilitate the adjustment of the length of the shell, after the length of the shell is adjusted, the position of the pipe body can be docked, when the angle of the pipe body needs to be adjusted, the user can directly rotate the shell through the shaft, so as to facilitate the adjustment of the angle of the pipe body, when the angle of the pipe body is adjusted, the mutual adsorption of the magnet and the iron ring can avoid the displacement of the pipe body, thereby achieving the purpose of conveniently adjusting the angle of the pipe body.

[0007] Furthermore, a first card slot is provided on the front side of the shell, and a first card block matching the first card slot is fixedly connected to the rear side of the shell cover, the first card block is clamped to the inner side of the first card slot, and the shell cover is clamped to the front side of the shell through the first card slot and the first card block, and a handle is fixedly connected to the front side of the shell cover, the shape of the handle is concave, and the shape of the corners of the handle is arc-shaped, and the position of the shell cover can be effectively fixed by clamping the first card block, thereby preventing the shell cover from being displaced.

[0008] Furthermore, a first sealing ring is fixedly connected to the front side of the shell, and the first sealing ring is located close to the inner side of the first block. The front side of the first sealing ring is in contact with the rear side of the shell cover. By installing the first sealing ring, the connection point between the shell and the shell cover can be effectively sealed, thereby improving the overall sealing between the shell and the shell cover.

[0009] Furthermore, a second card slot is provided at the bottom ends of the outer shell and the shell cover, and a second card block matching the second card slot is fixedly connected to the top end of the connecting plate, and the second card block is clamped to the inner side of the second card slot. The connecting plate is clamped to the bottom ends of the outer shell and the shell cover through the second card slot and the second card block. A protrusion is fixedly connected to the bottom end of the connecting plate, and the shape of the protrusion is an inverted cone. By clamping the second card block, the position of the connecting plate can be effectively fixed. The connecting plate can perform secondary reinforcement on the connecting point between the outer shell and the shell cover, thereby secondarily improving the stability of the fixation between the outer shell and the shell cover. At the same time, the connecting plate can also improve the stability of the installation of the electronic wire position.

[0010] Furthermore, a second sealing ring is fixedly connected to the top of the connecting plate, and the second sealing ring is located on the inner side close to the second card block. The bottom ends of the outer shell and the shell cover are provided with limiting grooves matching the second sealing ring. The second sealing ring covers the inner side of the limiting groove. By installing the second sealing ring, the connection point of the connecting plate can be effectively sealed, thereby further improving the overall sealing of the outer shell.

[0011] Furthermore, a first rubber ring is fixedly connected to the inner side of the limiting hole, and the first rubber ring covers the inner side of the limiting hole. The inner side of the first rubber ring is in contact with the outer side of the electronic wire. Through the installation of the rubber pad, the rubber pad has good anti-slip ability and elasticity, thereby effectively improving the stability of the installation of the electronic limit position.

[0012] Furthermore, a rectangular opening is provided at the top of the shell cover, the rectangular opening is communicated with the inner side of the shell, a transparent glass is fixedly connected to the inner side of the rectangular opening, the transparent glass covers the inner side of the rectangular opening, and the position of the transparent glass is symmetrical to the position of the PCBA board. By opening the rectangular opening, the user can directly check the position of the PCBA board through the transparent glass, thereby effectively improving the safety protection of the PCBA board.

[0013] Furthermore, a fixing block is threadedly connected to the rear side of the shell, the pipe body is located on the inner side of the connecting block, and a second rubber ring is fixedly connected to the inner side of the connecting block. The second rubber ring covers the inner side of the connecting block, and the inner side of the second rubber ring is in contact with the outer side of the pipe body. By fixing the second rubber ring, the position of the pipe body can be reinforced for a second time, thereby effectively improving the stability of the installation position of the pipe body.

[0014] Furthermore, screw holes are provided on the rear side of the fixing block, and the screw holes penetrate the fixing block and the rear side of the outer shell. Bolts are threadedly connected to the inner sides of the screw holes, and the front sides of the bolts are threadedly connected to the interior of the outer shell through the screw holes. The fixing block is threadedly connected to the rear side of the outer shell through the screw holes and the bolts. By screwing in the bolts, the position of the fixing block can be effectively fixed, and displacement of the fixing block can be avoided. The fixing block can effectively support and reinforce the position of the pipeline body.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Firstly, in the present invention, when in use, first use the positioning holes and the matching positioning parts to fix the position of the mounting plate, the mounting plate can effectively support the position of the outer shell, and its movable rod and sleeve rod can facilitate the adjustment of the length of the outer shell. After the length of the outer shell is adjusted, the position of the pipeline body is then docked. When the angle of the pipeline body needs to be adjusted, the user can directly rotate the outer shell through the shaft. The slide groove and the slider can provide secondary support and limit the rear side of the outer shell without hindering the adjustment of the angle of the outer shell, which can effectively improve the stability of the outer shell angle adjustment. When the angle adjustment of the pipeline body is completed, the mutual adsorption of the magnet and the iron ring can avoid the displacement of the pipeline body, thereby achieving the purpose of conveniently adjusting the angle of the pipeline body, and at the same time, it can also effectively improve the accuracy of the pipeline data that needs to be detected.

[0017] Secondly, in the present invention, the position of the shell cover can be effectively limited by fixing the first clamping block, and the first sealing ring can also effectively seal the connection point between the shell and the shell cover. After the position of the shell cover is fixed, the position of the connecting plate is clamped and fixed by the second clamping block. The connecting plate can perform secondary reinforcement on the connection point between the shell and the shell cover. At the same time, the second sealing ring can also seal the connection point between the two again, thereby effectively improving the overall sealing of the shell. The handle and the protrusion can provide the user with a gripping point. Since the PCBA board is installed at the bottom end of the inner side of the shell, it is also more convenient for the user to disassemble the PCBA board for maintenance at a later time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of part A;

[0020] Figure 3 It is a schematic diagram of the circular plate structure in the present invention;

[0021] Figure 4 It is a schematic diagram of the rear structure of the housing in the present invention;

[0022] Figure 5 It is a schematic diagram of the front structure of the housing in the present invention;

[0023] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part B;

[0024] Figure 7 It is a schematic diagram of the connecting plate structure in the present invention;

[0025] Figure 8 It is a schematic diagram of the bottom structure of the shell cover in the present invention;

[0026] Fig. 9 It is a schematic diagram of the front structure of the housing of the present invention.

[0027] In the figure: 1. shell; 2. PCBA board; 3. first sealing ring; 4. first slot; 5. shell cover; 6. handle; 7. first block; 8. rectangular opening; 9. transparent glass; 10. shock-absorbing pad; 11. second slot; 12. limit slot; 13. electronic wire; 14. controller; 15. connecting plate; 16. second block; 17. bump; 18. second sealing ring; 19. limit hole; 20. first rubber ring; 21. fixing block; 22. screw hole; 23. bolt; 24. pipe body; 25. rotating shaft; 26. magnet; 27. slide groove; 28. round plate; 29. ​​slider; 30. iron ring; 31. sleeve rod; 32. movable rod; 33. mounting plate; 34. positioning hole; 35. round groove; 36. rubber pad; 37. second rubber ring. DETAILED DESCRIPTION

[0028] Example

[0029] See also Figure 1-Figure 9In an embodiment of the present invention, a pipeline photoelectric liquid level sensor includes a shell 1, a PCBA board 2 is installed at the inner bottom end of the shell 1, a shell cover 5 is clamped on the front side of the shell 1, a shock-absorbing pad 10 is fixedly connected to the rear side of the shell cover 5, the rear side of the shock-absorbing pad 10 is in contact with the front side of the PCBA board 2, an electronic wire 13 is installed at the bottom end of the PCBA board 2, a controller 14 is installed at the bottom end of the electronic wire 13, a connecting plate 15 is clamped on the bottom ends of the shell 1 and the shell cover 5, a limiting hole 19 matching the electronic wire 13 is opened at the bottom end of the connecting plate 15, and the electronic wire 13 is located on the inner side of the limiting hole 19, a rotating shaft 25 is rotatably connected to the rear side of the rotating shaft 25, a circular plate 28 is fixedly connected to the rear side of the circular plate 28, and a slider 29 is fixedly connected to the front side of the circular plate 28 A slide groove 27 matching with the slider 29 is provided on the rear side of the housing 1. The shape of the slide groove 27 is circular. The slider 29 is slidably connected to the inner side of the slide groove 27. A magnet 26 is fixedly connected to the rear side of the housing 1. An iron ring 30 matching with the magnet 26 is fixedly connected to the front side of the circular plate 28. The position of the iron ring 30 is symmetrical with the position of the magnet 26. A sleeve rod 31 is fixedly connected to the rear side of the circular plate 28. A movable rod 32 is sleeved on the inner side of the sleeve rod 31. A mounting plate 33 is fixedly connected to the rear side of the movable rod 32. A positioning hole 34 is provided on the rear side of the mounting plate 33. A circular groove 35 is provided on the rear side of the mounting plate 33. A rubber pad 36 is fixedly connected to the inner side of the circular groove 35. The rubber pad 36 covers the inner side of the circular groove 35. A pipe is installed on the rear side of the housing 1. The body 24 has a light generator and a light receiver installed on its PCBA board 2, and a first optical prism surface and a second optical prism surface installed in its pipe body 24. When in use, the position of the mounting plate 33 is first fixed using a positioning piece that matches the positioning hole 34. The shock-absorbing pad 10 has good anti-vibration buffering ability, thereby improving the stability of the fixed position of the mounting plate 33. The mounting plate 33 can effectively support the position of the housing 1. Due to the presence of the movable rod 32 and the sleeve rod 31, it is convenient to adjust the position of the pipe body 24. After the position of the pipe body 24 is adjusted, one end of the pipe body 24 is connected to the extension pipe of the equipment water tank container, and the other end is connected as needed. When the angle of the pipe body 24 needs to be adjusted, the user can directly Then, the housing 1 is rotated by the shaft, and the slide groove 27 and the slider 29 can provide secondary support and limit to the rear side of the housing 1 without hindering the adjustment of the angle of the housing 1, which can effectively improve the stability of the angle adjustment of the housing 1. When the angle adjustment of the pipe body 24 is completed, the mutual adsorption of the magnet 26 and the iron ring 30 can prevent the pipe body 24 from being displaced, thereby achieving the purpose of conveniently adjusting the angle of the pipe body 24, and at the same time, it can also effectively improve the accuracy of the pipeline data that needs to be detected. When no liquid passes through the pipe body 24, the first optical prism surface will reflect most of the light emitted by the light emitter into the light receiver, and when liquid passes through the pipe body 24, the first optical prism surface will reflect a small part of the light emitted by the light emitter into the light receiver.Then, the light receiver receives the intensity of the light emitted by the light transmitter and outputs low voltage signals and high voltage signals to determine the water state and the water-free state.

[0030] See also Figure 8 and Fig. 9 The front side of the shell 1 is provided with a first card slot 4, and the rear side of the shell cover 5 is fixedly connected with a first card block 7 matching the first card slot 4. The first card block 7 is clamped to the inner side of the first card slot 4. The shell cover 5 is clamped to the front side of the shell 1 through the first card slot 4 and the first card block 7. The front side of the shell cover 5 is fixedly connected with a handle 6. The shape of the handle 6 is concave, and the shape of the corner of the handle 6 is arc-shaped. The front side of the shell 1 is fixedly connected with a first sealing ring 3. The first sealing ring 3 is located close to the inner side of the first card block 7. The front of the first sealing ring 3 The side is in contact with the rear side of the shell cover 5. Due to the existence of the first clamping block 7, the first clamping block 7 is inserted, so that the position of the shell cover 5 can be effectively fixed, and the shell cover 5 can be prevented from displacement. When the position of the shell cover 5 is fixed, the first sealing ring 3 will also seal the connection point between the two, thereby improving the sealing of the connection point. The handle 6 can provide the user with a gripping point, which can facilitate the user to remove the shell cover 5 later, and also facilitate the maintenance of the PCBA board 2 later.

[0031] See also Figures 5 to 7 The bottom ends of the shell 1 and the shell cover 5 are both provided with a second card slot 11, and the top end of the connecting plate 15 is fixedly connected with a second card block 16 matching the second card slot 11, and the second card block 16 is clamped on the inner side of the second card slot 11. The connecting plate 15 is clamped to the bottom ends of the shell 1 and the shell cover 5 through the second card slot 11 and the second card block 16. The bottom end of the connecting plate 15 is fixedly connected with a protrusion 17, and the shape of the protrusion 17 is an inverted cone. The top end of the connecting plate 15 is fixedly connected with a second sealing ring 18, and the second sealing ring 18 is located close to the inner side of the second card block 16. The shell 1 and the shell cover 5 is provided with a limiting groove 12 matching with the second sealing ring 18, and the second sealing ring 18 covers the inner side of the limiting groove 12. Due to the existence of the second clamping block 16, the second clamping block 16 can be inserted to effectively fix the position of the connecting plate 15, which can prevent the connecting plate 15 from being displaced. At the same time, the connecting plate 15 can also perform secondary reinforcement on the connecting point between the outer shell 1 and the shell cover 5, which can effectively improve the overall fixing stability of the outer shell 1. The second sealing ring 18 can effectively seal the connecting point of the connecting plate 15, thereby effectively improving the overall sealing of the outer shell 1.

[0032] See also Figure 7A first rubber ring 20 is fixedly connected to the inner side of the limiting hole 19. The first rubber ring 20 covers the inner side of the limiting hole 19. The inner side of the first rubber ring 20 is in contact with the outer side of the electronic wire 13. Due to the opening of the limiting hole 19, the position of the electronic wire 13 can be effectively limited. The first rubber ring 20 is a rubber product with good anti-slip ability and rubber shock absorption ability. It also has a certain elasticity. The first rubber ring 20 can effectively improve the stability of the installation of the electronic wire 13.

[0033] See also Figure 5 A rectangular opening 8 is provided at the top of the shell cover 5, and the rectangular opening 8 is communicated with the inner side of the shell 1. A transparent glass 9 is fixedly connected to the inner side of the rectangular opening 8, and the transparent glass 9 covers the inner side of the rectangular opening 8. The position of the transparent glass 9 is symmetrical with the position of the PCBA board 2. Due to the opening of the rectangular opening 8, the user can directly view the inner side of the shell cover 5 through the transparent glass 9 without opening the shell cover 5, which is beneficial for the user to observe the position of the PCBA board 2 at all times, and can effectively improve the safety protection of the PCBA board 2.

[0034] See also Figures 1 to 4 The rear side of the housing 1 is threadedly connected with a fixing block 21, the pipe body 24 is located on the inner side of the connecting block, the inner side of the connecting block is fixedly connected with a second rubber ring 37, the second rubber ring 37 covers the inner side of the connecting block, the inner side of the second rubber ring 37 is in contact with the outer side of the pipe body 24, the rear side of the fixing block 21 is provided with a screw hole 22, the screw hole 22 penetrates the fixing block 21 and the rear side of the housing 1, the inner side of the screw hole 22 is threadedly connected with a bolt 23, the front side of the bolt 23 is threadedly connected to the inside of the housing 1 through the screw hole 22, and the fixing block 21 is threadedly connected to the outer side of the housing 1 through the screw hole 22 and the bolt 23. On the rear side, due to the presence of the bolt 23, the screwing of the bolt 23 can effectively fix the position of the fixing block 21, and can prevent the fixing block 21 from being displaced. The fixing block 21 can effectively support the position of the pipe body 24, and the second rubber ring 37 has good anti-slip ability and elasticity, so that the pipe body 24 and the second rubber ring 37 can always maintain a close contact state, thereby further reinforcing the position of the pipe body 24. When the fixing block 21 needs to be removed, the bolt 23 can be screwed out of the screw hole 22, which is also convenient for the user to perform maintenance on the fixing block 21 later.

[0035] The working principle of the present invention is as follows: when in use, first use a positioning piece that matches the positioning hole 34 to fix the position of the mounting plate 33, and the mounting plate 33 can effectively support the position of the shell 1. Due to the presence of the movable rod 32 and the sleeve rod 31, it is convenient to adjust the position of the pipe body 24. After the position of the pipe body 24 is adjusted, one end of the pipe body 24 is then connected to the extension pipe of the equipment water tank container, and the other end is connected as needed. When it is necessary to adjust the angle of the pipe body 24, the user can directly rotate the shell 1 through the rotating shaft. The slide groove 27 and the slider 29 can provide secondary support and limit the rear side of the shell 1 without hindering the adjustment of the angle of the shell 1, which can effectively improve the stability of the angle adjustment of the shell 1. When the angle of the pipe body 24 is adjusted, After completion, the mutual adsorption of the magnet 26 and the iron ring 30 can prevent the pipe body 24 from being displaced, thereby achieving the purpose of conveniently adjusting the angle of the pipe body 24, and at the same time, it can also effectively improve the accuracy of the pipe data that needs to be detected. When no liquid passes through the pipe body 24, the first optical prism surface will reflect most of the light emitted by the light emitter to the light receiver, and when liquid passes through the pipe body 24, the first optical prism surface will reflect a small part of the light emitted by the light emitter to the light receiver, and then the light receiver receives the intensity of the light emitted by the light emitter to output a low voltage signal and a high voltage signal, so as to determine the water state and the water-free state. Due to the existence of the first card block 7, the first card block 7 is inserted, so that the position of the shell cover 5 can be effectively fixed, which can To prevent the shell cover 5 from displacement, when the position of the shell cover 5 is fixed, its first sealing ring 3 will also seal the connection point between the two, thereby improving the sealing of the connection point docking, and its handle 6 can provide the user with a gripping point, which can facilitate the user to remove the shell cover 5 later, and also facilitate the maintenance of the PCBA board 2 later. Due to the existence of the second clamping block 16, the second clamping block 16 can be inserted to effectively fix the position of the connecting plate 15, thereby preventing the connecting plate 15 from displacement. At the same time, the connecting plate 15 can also perform secondary reinforcement on the connection point between the outer shell 1 and the shell cover 5, thereby effectively improving the overall fixation stability of the outer shell 1, and its second sealing ring 18 can effectively seal the connection point of the connecting plate 15, thereby also The sealing performance of the whole shell 1 can be effectively improved. Due to the opening of the limiting hole 19, the position of the electronic wire 13 can be effectively limited. The first rubber ring 20 is a rubber product with good anti-slip ability and rubber shock absorption ability, and also has a certain elasticity. The first rubber ring 20 can effectively improve the stability of the installation of the electronic wire 13. Due to the opening of the rectangular opening 8, the user can directly view the inner side of the shell cover 5 through the transparent glass 9 without opening the shell cover 5, which is beneficial for the user to observe the position of the PCBA board 2 at all times, and can effectively improve the safety protection of the PCBA board 2. Due to the existence of the bolt 23, the screwing of the bolt 23 can effectively fix the position of the fixing block 21, and can prevent the fixing block 21 from displacement.The fixing block 21 can effectively support the position of the pipe body 24, and the second rubber ring 37 has good anti-slip ability and elasticity, so that the pipe body 24 and the second rubber ring 37 can always keep in contact with each other, thereby further reinforcing the position of the pipe body 24.

Claims

1. A pipeline photoelectric liquid level sensor, characterized in that: The invention comprises a shell, a PCBA board is installed at the inner bottom end of the shell, a shell cover is clamped on the front side of the shell, a shock-absorbing pad is fixedly connected to the rear side of the shell cover, the rear side of the shock-absorbing pad is in contact with the front side of the PCBA board, an electronic wire is installed at the bottom end of the PCBA board, a controller is installed at the bottom end of the electronic wire, a connecting plate is clamped on the bottom ends of the shell and the shell cover, a limiting hole matching the electronic wire is opened at the bottom end of the connecting plate, the electronic wire is located on the inner side of the limiting hole, a rotating shaft is rotatably connected to the rear side of the rotating shaft, a circular plate is fixedly connected to the rear side of the rotating shaft, a slider is fixedly connected to the front side of the circular plate, and the rear side of the shell is opened. A slide groove matching the slider is provided, the shape of the slide groove is circular, the slider is slidably connected to the inner side of the slide groove, the rear side of the shell is fixedly connected with a magnet, the front side of the circular plate is fixedly connected with an iron ring matching the magnet, the position of the iron ring is symmetrical with the position of the magnet, the rear side of the circular plate is fixedly connected with a sleeve rod, the inner side of the sleeve rod is sleeved with a movable rod, the rear side of the movable rod is fixedly connected with a mounting plate, the rear side of the mounting plate is provided with a positioning hole, the rear side of the mounting plate is provided with a circular groove, the inner side of the circular groove is fixedly connected with a rubber pad, the rubber pad covers the inner side of the circular groove, and a pipe body is installed on the rear side of the shell.

2. A pipeline photoelectric liquid level sensor according to claim 1, characterized in that: A first card slot is provided on the front side of the shell, and a first card block matching the first card slot is fixedly connected to the rear side of the shell cover, the first card block is clamped to the inner side of the first card slot, and the shell cover is clamped to the front side of the shell through the first card slot and the first card block, and a handle is fixedly connected to the front side of the shell cover, the handle is concave in shape, and the shape of the handle corners is arc-shaped.

3. A pipeline photoelectric liquid level sensor according to claim 2, characterized in that: A first sealing ring is fixedly connected to the front side of the shell. The first sealing ring is located close to the inner side of the first clamping block, and the front side of the first sealing ring is in contact with the rear side of the shell cover.

4. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The bottom ends of the outer shell and the shell cover are both provided with a second card slot, the top end of the connecting plate is fixedly connected with a second card block matching the second card slot, the second card block is clamped to the inner side of the second card slot, the connecting plate is clamped to the bottom ends of the outer shell and the shell cover through the second card slot and the second card block, the bottom end of the connecting plate is fixedly connected with a protrusion, and the shape of the protrusion is an inverted cone.

5. The pipeline photoelectric liquid level sensor according to claim 4, characterized in that: A second sealing ring is fixedly connected to the top of the connecting plate, and the second sealing ring is located on the inner side close to the second clamping block. The bottom ends of the outer shell and the shell cover are both provided with a limiting groove matching the second sealing ring, and the second sealing ring covers the inner side of the limiting groove.

6. A pipeline photoelectric liquid level sensor according to claim 4, characterized in that: A first rubber ring is fixedly connected to the inner side of the limiting hole. The first rubber ring covers the inner side of the limiting hole. The inner side of the first rubber ring is in contact with the outer side of the electronic wire.

7. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: A rectangular opening is provided at the top of the shell cover, the rectangular opening is communicated with the inner side of the shell, a transparent glass is fixedly connected to the inner side of the rectangular opening, the transparent glass covers the inner side of the rectangular opening, and the position of the transparent glass is symmetrical to the position of the PCBA board.

8. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The rear side of the shell is threadedly connected with a fixing block, the pipe body is located on the inner side of the connecting block, the inner side of the connecting block is fixedly connected with a second rubber ring, the second rubber ring covers the inner side of the connecting block, and the inner side of the second rubber ring is in contact with the outer side of the pipe body.

9. The pipeline photoelectric liquid level sensor according to claim 8, characterized in that: A screw hole is provided on the rear side of the fixing block, and the screw holes penetrate the fixing block and the rear side of the shell. Bolts are threadedly connected to the inner sides of the screw holes. The front sides of the bolts are threadedly connected to the inside of the shell through the screw holes. The fixing block is threadedly connected to the rear side of the shell through the screw holes and the bolts.

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