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 mounting pipeline, a mounting seat is movably connected to the outer side of the mounting pipeline, a mounting back plate is clamped to the other side of the mounting seat, a protective shell is in threaded connection with the side, away from the mounting pipeline, of the mounting seat, and a PCB is fixedly connected to the interior of the protective shell. Electronic connecting wires are symmetrically mounted at the bottom of the PCB at equal intervals, a controller is mounted at the other end of each electronic connecting wire, arc-shaped grooves are formed in the opposite ends of the mounting base and the mounting back plate, telescopic assemblies are symmetrically mounted in the arc-shaped grooves of the mounting base, and a clamping assembly is mounted on the side, away from the mounting base, of the mounting back plate. By the adoption of the structure, the device can easily adapt to pipelines of different diameters and can be installed and used on pipeline systems of various sizes, a special installation piece does not need to be customized for each pipeline size, the purchase cost is reduced, and the installation process is simplified.

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 sensor specially designed to detect changes in the liquid level in the pipeline. The working principle of the pipeline photoelectric liquid level sensor is based on optical principles, especially the different refractive index of infrared light in different media. The sensor contains infrared optical components, which are carefully designed into a sensing circuit. When the sensor is installed in the pipeline and is in working condition, it emits infrared light. When the interface between the liquid and the air in the pipeline changes, the reflection of the infrared light will also change accordingly. By detecting the change in this reflection, the sensor can quickly and stably determine the current liquid level status.

[0003] Announcement No. "CN222279883U" A pipeline photoelectric liquid level sensor, including a mounting pipe, one side of the mounting pipe is fixedly connected to a mounting shell, one side of the interior of the mounting shell is fixedly connected to an optical board, the other side of the interior of the mounting shell is plugged with a PCB board, one end of the PCB board is fixedly connected to a light transmitter and receiver, and a mounting plate is fixedly connected to the side of the mounting shell away from the pipe. The mounting shell is fixed on the mounting pipe, and a cylinder is fixed on the mounting shell. The cylinder drives the moving plate to move, and the moving plate drives the wiping pad to move. The wiping pad moves back and forth to wipe the mirror surface of the light transmitter and the light receiver to ensure that the mirror surface is clean, avoid the accumulation of dust, water film or chemicals, and ensure the normal propagation of light, thereby improving the accuracy of liquid level measurement, helping the sensor to work stably for a long time, reducing the frequency of repair and replacement, improving work efficiency, and reducing maintenance costs.

[0004] The above-mentioned utility model can ensure the normal propagation of light, thereby improving the accuracy of liquid level measurement, helping the sensor to work stably for a long time, reducing the frequency of maintenance and replacement, improving work efficiency, and reducing maintenance costs. However, since the mounting shell and the mounting pipe are fixedly connected, the mounting shell is designed and manufactured according to the diameter of a specific mounting pipe, and therefore cannot be directly adapted to pipes of different diameters. This results in that in actual applications, when the sensor needs to be replaced or applied to pipes of different diameters, the entire mounting shell needs to be replaced, which increases cost and complexity. Moreover, due to the fixed connection between the mounting shell and the mounting pipe, the sensor cannot adjust its position according to actual needs, which limits the flexibility and adaptability of the sensor in different application scenarios. Summary of the invention

[0005] The object of the present invention is to provide a pipeline photoelectric liquid level sensor to solve the problem that the mounting shell proposed in the above background technology is designed and manufactured according to the diameter of a specific mounting pipe and therefore cannot be directly adapted to pipes of different diameters. This results in that in actual applications, when the sensor needs to be replaced or applied to pipes of different diameters, the entire mounting shell needs to be replaced, increasing costs and complexity.

[0006] To achieve the above-mentioned purpose, the present invention provides a pipeline photoelectric liquid level sensor, comprising a mounting pipeline, a mounting seat movably connected to the outside of the mounting pipeline, a mounting back plate clamped on the other side of the mounting seat, a protective shell threadedly connected to the side of the mounting seat away from the mounting pipeline, a PCB board fixedly connected inside the protective shell, electronic connection wires symmetrically installed at the bottom of the PCB board at equal distances, a controller installed at the other end of the electronic connection wire, arc grooves are opened at the opposite ends of the mounting seat and the mounting back plate, telescopic components are symmetrically installed inside the arc groove of the mounting seat, and a clamping component is installed on the side of the mounting back plate away from the mounting seat;

[0007] The clamping assembly includes a rotating column, a threaded hole, a threaded rod, a driving gear, a driven gear, a turning handle, a rotating groove and a limit block. A rotating column is symmetrically embedded and rotatably connected on one side of the mounting back plate. A threaded hole is opened at one end of the rotating column, and the threaded hole runs through the rotating column and the mounting back plate. A threaded rod is threadedly connected inside the threaded hole. One end of the threaded rod extends to the inside of the arc groove of the mounting back plate and is rotatably connected to an arc clamping seat. The other end of the threaded rod is fixedly connected to a limit block. A driven gear is provided on the outer fixed sleeve of the rotating column. A rotating groove is opened on one side of the mounting back plate. A turning handle is rotatably connected inside the rotating groove. A driving gear is provided on the fixed sleeve of the outer wall of the turning handle. The driving gear is rotatably connected to one side of the mounting back plate, and the driving gear and the driven gear are meshed with each other. The limiting assembly is symmetrically installed inside the turning handle, which can easily adapt to pipes of different diameters and can be installed and used on pipe systems of various sizes. There is no need to customize special mounting parts for each pipe size, which not only reduces procurement costs, but also simplifies the installation process and does not require complex installation tools or a lot of installation time, thereby reducing installation costs.

[0008] Furthermore, the limit assembly includes a cavity, a second return spring, a moving plate, a pressing block and a clamping block. The cavity is symmetrically opened inside the turn handle, and the second return spring is symmetrically fixedly connected to one side of the cavity at an equal distance. The other end of the second return spring is fixedly connected to the moving plate, and the moving plate is slidingly connected to the inside of the cavity. The side of the moving plate away from the second return spring is respectively fixedly connected to the pressing block and the clamping block, and the other sides of the pressing block and the clamping block extend out of the outer wall of the turn handle. The rotating groove is slidingly connected to the turn handle, and the inner wall of the rotating groove and the inner wall of the driving gear are symmetrically opened with clamping grooves, and the clamping block is clamped with the clamping groove. The side of the turn handle close to the driving gear is symmetrically fixedly connected with a limiting column, and one side of the driving gear is symmetrically opened with a limiting hole, and the limiting column and the limiting hole are plug-in. This can effectively prevent the threaded rod from loosening due to vibration or external force during long-term use, thereby ensuring the stability and reliability of the sensor, avoiding measurement errors or failures caused by loosening, and can generate a larger clamping force to ensure that the sensor can be firmly fixed on the pipeline.

[0009] Furthermore, the outer wall of the throttle is symmetrically provided with guide grooves through an annular circular array, and the inner wall of the driving gear is symmetrically fixedly connected with guide blocks through an annular circular array. The guide blocks and the guide grooves are slidably connected, and the sliding cooperation between the guide blocks and the guide grooves can ensure the stability and accuracy of the throttle during movement.

[0010] Furthermore, the telescopic component includes a mounting groove, a fixing seat, a first fixing column, a second fixing column, a built-in hole, a first return spring and a connecting column. The inner wall of the arc-shaped groove of the mounting seat is symmetrically provided with mounting grooves, and connecting columns are symmetrically provided inside the arc-shaped groove of the mounting seat. The bottom of the mounting groove and one end of the connecting column are fixedly connected to the fixing seat, one side of the fixing seat inside the mounting groove is fixedly connected to the first fixing column, the other end of the first fixing column is provided with a built-in hole, the bottom of the built-in hole is fixedly connected to the first return spring, the other end of the first return spring is fixedly connected to the second fixing column, the second fixing column is slidably connected to the inside of the built-in hole, the other end of the second fixing column is fixedly connected to the fixing seat on the connecting column, and the other end of the connecting column is fixedly connected to an arc-shaped clamping seat, which can enable the sensor to maintain a stable position and posture after installation. Even when the installation pipeline is subjected to external force or vibration, the sensor can maintain its stability through the elastic restoring force of the telescopic component, thereby ensuring the accuracy and reliability of the measurement results.

[0011] Furthermore, a non-slip pad is glued to the clamping end of the arc-shaped clamping seat, and non-slip bumps are arranged on the surface of the non-slip pad. The non-slip pad is made of soft rubber, which can significantly enhance the friction between the arc-shaped clamping seat and the installation pipe, thereby preventing the sensor from sliding or falling off on the pipe.

[0012] Furthermore, assembly blocks are symmetrically fixedly connected near the chamfers on one side of the mounting backplate, and assembly grooves are symmetrically opened near the chamfers on one side of the mounting seat. The assembly blocks and the assembly grooves are snap-connected. The snap-connection design of the assembly blocks and the assembly grooves makes the connection between the mounting backplate and the mounting seat simple and quick. The operator does not need to perform complicated bolt connections or welding operations. Only the assembly block needs to be aligned with the assembly groove and gently pushed in to achieve a firm connection between the two. This greatly simplifies the installation process and improves work efficiency.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] First, in the present invention, the protective housing together with the mounting seat is fitted with the mounting pipe, and then the mounting back plate is combined with the mounting seat, and the mounting block is clamped with the mounting groove, and then the handle is rotated to make the driving gear drive the driven gear to rotate, thereby controlling the rotation column to rotate, and the threaded hole inside the rotating column and the threaded rod are threadedly rotated, thereby controlling the arc clamping seat to move, and the arc clamping seat clamps the mounting pipe to complete the installation of the photoelectric liquid level sensor, which can easily adapt to pipes of different diameters and can be installed and used on pipe systems of various sizes without the need to customize special mounting parts for each pipe size, which not only reduces the procurement cost, but also simplifies the installation process, and does not require complex installation tools or a lot of installation time, thereby reducing the installation cost;

[0015] Secondly, in the present invention, after the arc-shaped clamping seat completes the installation of the photoelectric liquid level sensor, the button block is pressed to make the movable plate drive the card block to move, and the movable plate is pressed against the second return spring, the second return spring is compressed, and the card block is retracted into the cavity at the same time, and then the handle is pushed to make the turning handle slide inside the rotating groove, and the card block is moved to the card slot inside the rotating groove, and the button block is released, and the movable plate rebounds to drive the card block to pop out and engage with the card slot, and at the same time, the limiting column at one end of the turning handle is inserted into the limiting hole, which can effectively prevent the threaded rod from loosening due to vibration or external force during long-term use, thereby ensuring the stability and reliability of the sensor, avoiding measurement errors or failures caused by loosening, and generating a larger clamping force to ensure that the sensor can be firmly fixed on the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of another side in the present invention;

[0018] Figure 3 It is a schematic diagram of the explosion three-dimensional structure in the present invention;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting back plate in the present invention;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the turning handle in the present invention;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the driving gear in the present invention;

[0022] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the limiting component in the present invention;

[0023] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the telescopic component in the present invention.

[0024] In the figure: 1. installation pipe; 2. installation seat; 3. installation back plate; 4. arc groove; 5. protective shell; 6. PCB board; 7. electronic connection line; 8. controller; 9. assembly block; 10. assembly groove; 11. telescopic component; 111. installation groove; 112. fixing seat; 113. first fixing column; 114. second fixing column; 115. built-in hole; 116. first return spring; 117. connecting column; 12. arc clamping seat; 13 , anti-slip pad; 14, clamping assembly; 141, rotating column; 142, threaded hole; 143, threaded rod; 144, driving gear; 145, driven gear; 146, turning handle; 147, rotating groove; 15, limiting assembly; 151, cavity; 152, second return spring; 153, moving plate; 154, pressing block; 155, clamping block; 16, clamping slot; 17, limiting column; 18, limiting hole; 19, guide block; 20, guide groove. DETAILED DESCRIPTION

[0025] Example

[0026] See also Figure 1-Figure 8In an embodiment of the present invention, a pipeline photoelectric liquid level sensor includes a mounting pipeline 1, a mounting seat 2 is movably connected to the outside of the mounting pipeline 1, a mounting back plate 3 is clamped on the other side of the mounting seat 2, a protective shell 5 is threadedly connected to the side of the mounting seat 2 away from the mounting pipeline 1, a PCB board 6 is fixedly connected inside the protective shell 5, electronic connection wires 7 are symmetrically installed at the bottom of the PCB board 6 at equal distances, a controller 8 is installed at the other end of the electronic connection wire 7, arc grooves 4 are opened at the opposite ends of the mounting seat 2 and the mounting back plate 3, and telescopic components 11 are symmetrically installed inside the arc groove 4 of the mounting seat 2 A clamping assembly 14 is installed on the side of the mounting back plate 3 away from the mounting seat 2. The mounting pipe 1 is made of transparent material. A light emitter and a light receiver are installed on the PCB board 6. When no liquid passes through the mounting pipe 1, the optical prism surface will reflect most of the light emitted by the light emitter into the light receiver. When liquid passes through the mounting pipe 1, the 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 emitter to output a low voltage signal and a high voltage signal, so as to determine the water state and the water-free state.

[0027] The clamping assembly 14 includes a rotating column 141, a threaded hole 142, a threaded rod 143, a driving gear 144, a driven gear 145, a turning handle 146, a rotating groove 147 and a limit block. One side of the mounting back plate 3 is symmetrically embedded and rotatably connected with the rotating column 141. A threaded hole 142 is provided at one end of the rotating column 141. The threaded hole 142 runs through the rotating column 141 and the mounting back plate 3. The threaded rod 143 is threadedly connected inside the threaded hole 142. One end of the threaded rod 143 extends into the arc groove 4 of the mounting back plate 3 and is rotatably connected to the arc clamping seat 12. The other end of the threaded rod 143 is fixedly connected to the limit block. A driven gear 145 is fixedly sleeved on the outer side of the rotating column 141. A rotating groove 147 is provided on one side of the mounting back plate 3. The rotating groove 147 is rotatably connected with the turning handle 146. A driving gear 144 is fixedly sleeved on the outer wall of the turning handle 146, and the driving gear 144 is rotatably connected to one side of the mounting back plate 3, and the driving gear 144 and the driven gear 145 are meshed with each other. A limiting assembly 15 is symmetrically installed inside the turning handle 146, and the protective shell 5 together with the mounting seat 2 are fitted with the mounting pipe 1, and then the mounting back plate 3 and the mounting seat 2 are merged, and the assembly block 9 and the assembly groove 10 are clamped together, and then the turning handle 146 is rotated to make the driving gear 144 drive the driven gear 145 to rotate, thereby controlling the rotation column 141 to rotate, and the threaded hole 142 inside the rotating column 141 and the threaded rod 143 are threadedly rotated, thereby controlling the arc clamping seat 12 to move, and the arc clamping seat 12 clamps the mounting pipe 1 to complete the installation of the photoelectric liquid level sensor.

[0028] See also Figure 5-Figure 7The limit assembly 15 includes a cavity 151, a second return spring 152, a movable plate 153, a push block 154 and a clamping block 155. The cavity 151 is symmetrically opened inside the turning handle 146. The second return spring 152 is symmetrically fixedly connected to one side of the cavity 151 at an equal distance. The other end of the second return spring 152 is fixedly connected to the movable plate 153. The movable plate 153 is slidably connected to the inside of the cavity 151. The side of the movable plate 153 away from the second return spring 152 is respectively fixedly connected to the push block 154 and the clamping block 155. The other sides of the push block 154 and the clamping block 155 extend out of the outer wall of the turning handle 146. The rotating groove 147 is slidably connected to the turning handle 146. The inner wall of the groove 147 and the inner wall of the driving gear 144 are symmetrically provided with a card slot 16, and the card block 155 is card-connected with the card slot 16. When the arc-shaped clamping seat 12 completes the installation of the photoelectric liquid level sensor, the button 154 is pressed to make the movable plate 153 drive the card block 155 to move, and the movable plate 153 presses against the second return spring 152, and the second return spring 152 is compressed. At the same time, the card block 155 retracts into the cavity 151, and then the handle is pushed to make the turning handle 146 slide inside the rotating groove 147, and the card block 155 is moved to the card slot 16 inside the rotating groove 147, and the button 154 is released. The movable plate 153 rebounds and drives the card block 155 to pop out and card-connect with the card slot 16.

[0029] See also Figure 5-Figure 6 The outer wall of the turning handle 146 is symmetrically provided with guide grooves 20 through an annular circular array, and the inner wall of the driving gear 144 is symmetrically fixedly connected with guide blocks 19 through an annular circular array. The guide blocks 19 and the guide grooves 20 are slidably connected. When the clamping block 155 is engaged with the clamping groove 16 inside the driving gear 144, the turning handle 146 is pushed to make the guide block 19 on the inner wall of the driving gear 144 slide inside the guide groove 20 outside the turning handle 146.

[0030] See also Figure 5-Figure 6 The turning handle 146 is symmetrically fixedly connected to the limiting column 17 on one side close to the driving gear 144, and a limiting hole 18 is symmetrically opened on one side of the driving gear 144. The limiting column 17 and the limiting hole 18 are plug-in. When the clamping block 155 and the clamping groove 16 inside the driving gear 144 are completely engaged, the turning handle 146 is pushed, and the turning handle 146 drives the limiting column 17 to be inserted into the limiting hole 18.

[0031] See also Figure 8The telescopic assembly 11 includes a mounting groove 111, a fixing seat 112, a first fixing column 113, a second fixing column 114, a built-in hole 115, a first return spring 116 and a connecting column 117. The inner wall of the arc groove 4 of the mounting seat 2 is symmetrically provided with the mounting groove 111, and the arc groove 4 of the mounting seat 2 is symmetrically provided with a connecting column 117. The bottom of the mounting groove 111 and one end of the connecting column 117 are both fixedly connected to the fixing seat 112. One side of the fixing seat 112 inside the mounting groove 111 is fixedly connected to the first fixing column 113. The other end of the first fixing column 113 is provided with a built-in hole 115. The bottom of the built-in hole 115 is fixedly connected to the first return spring 116. The first The other end of the reset spring 116 is fixedly connected to the second fixing column 114, and the second fixing column 114 is slidably connected to the inside of the built-in hole 115. The other end of the second fixing column 114 is fixedly connected to the fixing seat 112 on the connecting column 117, and the other end of the connecting column 117 is fixedly connected to the arc clamping seat 12. When the threaded rod 143 drives the arc clamping seat 12 to clamp the installation pipe 1, the pipe puts pressure on the arc clamping column on the other side, so that the connecting column 117 drives the second fixing column 114 to slide in the built-in hole 115 of the first fixing column 113, and the second fixing column 114 presses against the first reset spring 116, and the first reset spring 116 is compressed.

[0032] See also Figure 3 The clamping end of the arc-shaped clamping seat 12 is glued with an anti-skid pad 13, and the surface of the anti-skid pad 13 is provided with anti-skid bumps. The anti-skid pad 13 is made of soft rubber. The anti-skid pad 13 can significantly enhance the friction between the arc-shaped clamping seat 12 and the installation pipe 1, thereby preventing the sensor from sliding or falling off on the pipe.

[0033] See also Figure 2 One side of the mounting back plate 3 is symmetrically fixedly connected with an assembly block 9 near the chamfer, and one side of the mounting seat 2 is symmetrically opened with an assembly groove 10 near the chamfer. The assembly block 9 and the assembly groove 10 are snap-fitted. The protective shell 5 together with the mounting seat 2 are fitted with the mounting pipe 1, and then the mounting back plate 3 and the mounting seat 2 are combined and snap-fitted through the assembly block 9 and the assembly groove 10.

[0034] The working principle of the present invention is: first, the protective shell 5 together with the mounting seat 2 is fitted with the mounting pipe 1, and then the mounting back plate 3 is merged with the mounting seat 2, and the mounting block 9 is clamped with the mounting groove 10, and then the turning handle 146 is rotated to make the driving gear 144 drive the driven gear 145 to rotate, thereby controlling the rotation column 141 to rotate, and the threaded hole 142 inside the rotating column 141 and the threaded rod 143 are threadedly rotated, thereby controlling the arc clamping seat 12 to move, and the arc clamping seat 12 clamps the mounting pipe 1. When the arc clamping seat 12 completes the installation of the photoelectric liquid level sensor, the button 154 is pressed to make the moving plate 153 drive the clamping block 155 to move, and the moving plate 153 presses against the second return spring 152, and the second return spring 152 is compressed, and at the same time When the card block 155 is retracted into the cavity 151, the handle is pushed to make the turning handle 146 slide inside the rotating groove 147, and the card block 155 is moved to the card slot 16 inside the rotating groove 147. The button 154 is released, and the movable plate 153 rebounds to drive the card block 155 to pop out and engage with the card slot 16. At the same time, the limiting column 17 at one end of the turning handle 146 is inserted into the limiting hole 18. When no liquid passes through the installation pipe 11, the optical prism surface will reflect most of the light emitted by the light emitter into the light receiver, and when liquid passes through the installation pipe 11, the optical prism surface will reflect a small part of the light emitted by the light emitter into the light receiver, and then the light receiver receives the light emitted by the light emitter The intensity outputs a low voltage signal and a high voltage signal, thereby determining the water state and the water-free state;

[0035] The present invention can easily adapt to pipes of different diameters and can be installed and used on pipe systems of various sizes. There is no need to customize special mounting parts for each pipe size, which not only reduces procurement costs but also simplifies the installation process and does not require complicated installation tools or a lot of installation time, thereby reducing installation costs.

Claims

1. A pipeline photoelectric liquid level sensor, characterized in that: It comprises a mounting pipe, a mounting seat is movably connected to the outside of the mounting pipe, a mounting back plate is clamped on the other side of the mounting seat, a protective shell is threadedly connected to the side of the mounting seat away from the mounting pipe, a PCB board is fixedly connected inside the protective shell, electronic connection wires are symmetrically installed at the bottom of the PCB board at equal distances, a controller is installed at the other end of the electronic connection wire, arc grooves are opened at the opposite ends of the mounting seat and the mounting back plate, telescopic components are symmetrically installed inside the arc groove of the mounting seat, and a clamping component is installed on the side of the mounting back plate away from the mounting seat; The clamping assembly includes a rotating column, a threaded hole, a threaded rod, a driving gear, a driven gear, a turning handle, a rotating groove and a limit block. The rotating column is symmetrically embedded and rotatably connected on one side of the mounting back plate. A threaded hole is provided at one end of the rotating column, and the threaded hole passes through the rotating column and the mounting back plate. A threaded rod is threadedly connected inside the threaded hole. One end of the threaded rod extends to the inside of the arc groove of the mounting back plate and is rotatably connected to an arc clamping seat. The other end of the threaded rod is fixedly connected to a limit block. A driven gear is provided on the outer side of the rotating column. A rotating groove is provided on one side of the mounting back plate. A turning handle is rotatably connected inside the rotating groove. A driving gear is provided on the outer wall of the turning handle. The driving gear is rotatably connected to one side of the mounting back plate, and the driving gear and the driven gear are meshed with each other. A limiting assembly is symmetrically installed inside the turning handle.

2. A pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The limiting assembly includes a cavity, a second return spring, a movable plate, a push block and a clamping block. The cavity is symmetrically opened inside the turning handle. The second return spring is symmetrically fixedly connected to one side of the cavity at equal distances. The other end of the second return spring is fixedly connected to the movable plate. The movable plate is slidably connected to the inside of the cavity. The side of the movable plate away from the second return spring is respectively fixedly connected to a push block and a clamping block. The other sides of the push block and the clamping block extend out of the outer wall of the turning handle.

3. A pipeline photoelectric liquid level sensor according to claim 2, characterized in that: The rotating groove is slidably connected to the turning handle, the inner wall of the rotating groove and the inner wall of the driving gear are symmetrically provided with clamping grooves, and the clamping block is clamped with the clamping grooves.

4. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The outer wall of the turning handle is symmetrically provided with guide grooves through an annular circumferential array, and the inner wall of the driving gear is symmetrically fixedly connected with guide blocks through an annular circumferential array, and the guide blocks are slidably connected to the guide grooves.

5. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The turning handle is symmetrically fixedly connected to a limiting column on one side close to the driving gear, and a limiting hole is symmetrically provided on one side of the driving gear, and the limiting column and the limiting hole are plug-connected.

6. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The telescopic assembly includes a mounting groove, a fixing seat, a first fixing column, a second fixing column, a built-in hole, a first return spring and a connecting column, the inner wall of the arc-shaped groove of the fixing seat is symmetrically provided with mounting grooves, the arc-shaped groove of the fixing seat is symmetrically provided with connecting columns, the bottom of the mounting groove and one end of the connecting column are both fixedly connected to the fixing seat, one side of the fixing seat inside the fixing groove is fixedly connected to the first fixing column, the other end of the first fixing column is provided with a built-in hole, the bottom of the built-in hole is fixedly connected to the first return spring, the other end of the first return spring is fixedly connected to the second fixing column, the second fixing column is slidably connected to the inside of the built-in hole, the other end of the second fixing column is fixedly connected to the fixing seat on the connecting column, and the other end of the connecting column is fixedly connected to the arc-shaped clamping seat.

7. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The clamping end of the arc-shaped clamping seat is glued with an anti-skid pad, the surface of the anti-skid pad is provided with anti-skid protrusions, and the material of the anti-skid pad is soft rubber.

8. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: One side of the mounting back plate is symmetrically fixedly connected with an assembly block near the chamfer, and one side of the mounting seat is symmetrically provided with an assembly groove near the chamfer, and the assembly block and the assembly groove are snap-connected.

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