Pipeline type photoelectric liquid level sensor

Abstract

The utility model relates to the technical field of photoelectric liquid level sensors, and particularly discloses a pipeline type photoelectric liquid level sensor which comprises an installation pipeline, one side of the installation pipeline is fixedly connected with an installation shell, one side of the interior of the installation shell is fixedly connected with an optical plate, and the other side of the interior of the installation shell is connected with a PCB in an inserted mode. One end of the PCB is fixedly connected with a light transmitting and receiving device, the side, away from the pipeline, of the mounting shell is fixedly connected with a mounting plate, the mounting shell is fixed to the mounting pipeline, an air cylinder is fixed to the mounting shell, the air cylinder is used for driving a moving plate to move, and the moving plate drives a wiping pad to move; the wiping pad moves back and forth to wipe the mirror surfaces of the light emitter and the light receiver, so that the mirror surfaces are clean, accumulation of dust, water films or chemical substances can be avoided, and normal propagation of light is ensured, and therefore, the accuracy of liquid level measurement is improved, long-term stable work of the sensor is facilitated, the frequency of maintenance and replacement is reduced, and the working efficiency is improved; the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model 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 used to measure the liquid level of liquid or solid materials in a pipeline or container. It is usually composed of a light emitter, a light receiver and a prism. In the pipeline photoelectric liquid level sensor, the light emitter emits light, which is reflected or refracted by the prism and received by the light receiver. Based on the light reception, the sensor can determine the height of the liquid level.

[0003] For example, a Chinese patent with publication number CN218035252U discloses a pipeline photoelectric liquid level sensor, including a shell structure, a PCBA board and a pipeline structure, wherein an installation cavity is provided in the shell structure, and a light emitter and a light receiver are provided on the bottom surface of the PCBA board, and are arranged in the installation cavity of the shell structure, and 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, a prism structure integrally formed therewith is provided on the inner wall of the pipeline structure, and a first optical prism surface and a second optical prism surface are provided on the prism structure, the first optical prism surface is used to reflect the light emitted by the light emitter to the second optical prism surface, and the second optical prism surface is used to reflect the light reflected thereon by the first optical prism surface to the light receiver.

[0004] There are some defects in the existing pipeline photoelectric liquid level sensor. When the photoelectric liquid level sensor is used in an industrial environment, even if the inner shell is well sealed, a certain degree of dust may still accumulate after long-term use, affecting the operation of the optical transmitter and the optical receiver. The moisture in the environment may cause water film to form on the surface of the optical transmitter and the optical receiver, affecting the propagation of light. In addition, the existing PCB board is plugged or welded on the installation pipe. The plug-in connection is not firm and stable enough, the signal transmission is unstable, and welding is not convenient for maintaining the PCB board and the optical transmitter and the optical receiver.

[0005] To this end, we propose a pipeline photoelectric liquid level sensor to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a pipeline photoelectric liquid level sensor to solve the problem proposed in the above background technology that when the photoelectric liquid level sensor is used in an industrial environment, even if the inner shell is well sealed, a certain degree of dust may still accumulate after long-term use, affecting the operation of the optical transmitter and the optical receiver, and the moisture in the environment may cause water film to form on the surface of the optical transmitter and the optical receiver, affecting the propagation of light. In addition, the existing PCB board is plugged or welded on the installation pipeline, the plug-in connection is not firm and stable enough, the signal transmission is unstable, and welding is not convenient for maintaining the PCB board and the optical transmitter and the optical receiver.

[0007] To achieve the above-mentioned purpose, the utility model provides a pipeline photoelectric liquid level sensor, comprising a mounting pipeline, a mounting shell is fixedly connected to one side of the mounting pipeline, an optical board is fixedly connected to one side of the mounting shell, a PCB board is plugged into the other side of the mounting shell, one end of the PCB board is fixedly connected to an optical transmitter, a mounting plate is fixedly connected to one side of the mounting shell away from the pipeline, hooks are fixedly connected to both sides of one end of the PCB board, a positioning hole is provided on one side of the hook, connecting holes are provided on both sides of one end of the mounting plate, one side of the hook is movably connected to the connecting hole, a driving component is fixedly connected to one side of the mounting plate, a positioning component is fixedly connected to the other side of the mounting plate, a wiping component is fixedly connected to one side of the mounting shell, one side of the wiping component is movably connected to one side of the optical transmitter, a collecting component is fixedly connected to one end of the PCB board away from the mounting plate, and one side of the collecting component is located at the mounting plate. Inside the shell, the lower end of the PCB board is fixedly connected with an electronic wire. By setting a wiping component, regular cleaning can reduce contamination on the surface of the optical element, maintain the cleanliness of the optical element, and help the sensor work stably for a long time. Regular cleaning can reduce the loss of optical elements, extend the service life of optical transmitters and optical receivers, and reduce the frequency of maintenance and replacement. Keeping the optical transmitter and optical receiver clean can reduce errors and failures caused by contamination, improve work efficiency, and reduce maintenance costs. By setting drive components, positioning components, hooks, connecting holes, etc., the PCB board can be quickly disassembled and assembled to quickly replace faulty boards or debug, reduce the downtime of the production line, and improve production efficiency. The PCB board can be quickly disassembled and assembled to replace boards with different functions as needed, thereby improving the flexibility and scalability of the system. The stable connection of the PCB board can reduce failures caused by connection problems, reduce maintenance costs and repair time, and improve the reliability and stability of the system.

[0008] Furthermore, the driving assembly includes a first groove, the first groove is opened on one side of the mounting plate, the interior of the first groove is rotatably connected to a rotating rod, one side of the rotating rod is fixedly connected to a first tooth cone, one side of the first tooth cone is meshingly connected to a second tooth cone, the mounting plate is fixedly connected to an end away from the mounting pipe with a side frame, one side of the side frame is rotatably connected to a rotating shaft, and the end of the rotating shaft away from the first groove is fixedly connected to a torsion wheel.

[0009] Furthermore, the positioning assembly includes a second groove, the second groove is opened on one side of the mounting plate, the inside of the second groove is rotatably connected with a first screw rod, one end of the first screw rod is fixedly connected to one end of the rotating rod, the outer surface of the first screw rod is threadedly connected with a positioning rod, one side of the positioning rod is slidably connected to the inside of the second groove, one side of the positioning rod extends into the inside of the connecting hole, and one side of the positioning rod is inserted into the inside of the positioning hole, both sides of the positioning rod are fixedly connected with limit blocks, and the limit blocks are slidably connected to the inside of the second groove.

[0010] Furthermore, guide blocks are fixedly connected to both sides of the interior of the installation shell, guide grooves are provided on both sides of the PCB board, and the guide blocks are slidably connected to the guide grooves.

[0011] Furthermore, the wiping assembly includes a fixed block, which is fixedly connected to the upper end of the mounting shell, the upper end of the fixed block is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to a movable plate, the movable plate is movably connected to the inside of the mounting shell, one end of the movable plate is fixedly connected to a wiping pad, and one side of the wiping pad is fit-connected to one side of the optical transmitter.

[0012] Furthermore, both sides of the upper end of the movable plate are fixedly connected with movable tubes, both sides of the interior of the fixed block are fixedly connected with fixed tubes, and one side of the movable tube is slidably connected with the fixed tube.

[0013] Furthermore, the collection component includes a collection box, which is fixedly connected to one side of the PCB board, slots are provided on both sides of one end of the collection box, and plug blocks are fixedly connected to both sides of one end of the PCB board, and the plug blocks are movably connected to the slots.

[0014] Furthermore, the internal thread of the slot is connected to a second screw rod, one end of the second screw rod is fixedly connected to a torsion rod, one side of the torsion rod is movably connected to one side of the collection box, one side of the insert block is provided with a screw groove, and one side of the second screw rod is threadedly connected to the screw groove.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] Firstly, in the utility model, a mounting shell is fixed on the mounting pipe, and a cylinder is fixed on the mounting shell. The cylinder is used to drive a movable plate to move, and the movable plate drives a 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, and the accumulation of dust, water film or chemical substances can be avoided to 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.

[0017] Secondly, in the utility model, a slot is provided on the PCB board, a plug-in block is inserted into the slot, the plug-in block is connected to a fixed collection box, the wiping pad shell pushes the wiped dust to the bottom of the collection box, and the collection box is used to collect the dust, so as to prevent impurities from falling into the installation shell and affecting the use of the PCB board. Since the collection box covers and blocks the lower opening of the installation shell, impurities can be prevented from entering the installation shell.

[0018] Thirdly, in the utility model, a mounting plate is fixed on the mounting shell, a connecting hole is provided on the mounting plate, a hook is fixed on the PCB board, a positioning hole is provided on the hook, after the PCB board is inserted into the mounting shell, the hook is inserted into the connecting hole, and then the driving assembly on the mounting plate is used to provide power for the two positioning assemblies, so that the positioning rod in the positioning assembly passes through the connecting hole and is inserted into the positioning hole of the hook, so that the PCB board is connected and fixed to the mounting shell. This design not only facilitates the disassembly of the PCB board, but also facilitates maintenance personnel to quickly replace or repair it, saves maintenance time, and improves maintenance efficiency, but also makes the connection of the mounting shell stable and firm. The stable connection can ensure the stability and reliability of signal transmission, and avoid signal interference or data loss caused by poor connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure inside the shell installed in the utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure between the mounting plate and the mounting shell in the utility model;

[0022] Figure 4 For the utility model Figure 3 A schematic diagram of the enlarged structure at point A;

[0023] Figure 5 This is a schematic diagram of the PCB board and the hook structure in the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the wiping component in the utility model;

[0025] Figure 7This is a schematic diagram of the connection structure of one side of the collection component and the PCB board in the utility model;

[0026] Figure 8 It is a schematic diagram of the connection structure of the other side of the collection component and the PCB board in the utility model.

[0027] In the figure: 1, installation pipe; 2, installation shell; 21, optical plate; 3, installation plate; 4, PCB board; 41, optical receiver; 5, electronic wire; 6, drive assembly; 61, first groove; 62, rotating rod; 63, first tooth cone; 64, second tooth cone; 65, side frame; 66, rotating shaft; 67, torsion wheel; 7, positioning assembly; 71, second groove; 72, first screw rod; 73, positioning rod; 74, limit block ;8. Guide block;9. Guide groove;10. Wiping assembly;101. Fixed block;102. Cylinder;103. Moving plate;104. Wiping pad;105. Fixed tube;106. Moving tube;11. Collecting assembly;111. Collecting box;112. Slot;113. Insert block;114. Second screw;115. Screw groove;116. Torsion bar;12. Hook;13. Positioning hole;14. Connecting hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-Figure 8In the embodiment of the utility model, the utility model comprises a mounting pipe 1, a mounting shell 2 is fixedly connected to one side of the mounting pipe 1, an optical plate 21 is fixedly connected to one side of the inner part of the mounting shell 2, the optical plate 21 is a prism, a PCB board 4 is plugged into the other side of the inner part of the mounting shell 2, an optical transmitter and receiver 41 is fixedly connected to one end of the PCB board 4, and the optical transmitter and receiver 41 is composed of an optical transmitter and an optical receiver, a mounting plate 3 is fixedly connected to one side of the mounting shell 2 away from the pipe, hooks 12 are fixedly connected to both sides of one end of the PCB board 4, a positioning hole 13 is provided on one side of the hook 12, connecting holes 14 are provided on both sides of one end of the mounting plate 3, one side of the hook 12 is movably connected to the connecting hole 14, a driving component 6 is fixedly connected to one side of the mounting plate 3, a positioning component 7 is fixedly connected to the other side of the mounting plate 3, a wiping component 10 is fixedly connected to one side of the mounting shell 2, one side of the wiping component 10 is movably connected to one side of the optical transmitter and receiver 41, a collecting component 11 is fixedly connected to one end of the PCB board 4 away from the mounting plate 3, and the collecting component 11 One side is located inside the mounting shell 2, and the lower end of the PCB board 4 is fixedly connected with an electronic wire 5. By setting a wiping component 10, regular cleaning can reduce the contamination of the surface of the optical element, maintain the cleanliness of the optical element, and help the sensor to work stably for a long time. Regular cleaning can reduce the loss of optical elements, extend the service life of the optical transmitter and the optical receiver, and reduce the frequency of maintenance and replacement. Keeping the optical transmitter and the optical receiver clean can reduce errors and failures caused by contamination, improve work efficiency, and reduce maintenance costs. By setting a driving component 6, a positioning component 7, a hook 12, a connecting hole 14, etc., the PCB board 4 can be quickly disassembled and assembled to quickly replace a faulty board or debug, reduce the downtime of the production line, and improve production efficiency. The PCB board 4 can be quickly disassembled and assembled to replace boards with different functions as needed, thereby improving the flexibility and scalability of the system. The stable connection of the PCB board 4 can reduce failures caused by connection problems, reduce maintenance costs and repair time, and improve the reliability and stability of the system.

[0030] See also Figure 4The driving assembly 6 includes a first groove 61, which is opened on one side of the mounting plate 3. A rotating rod 62 is rotatably connected inside the first groove 61. A first tooth cone 63 is fixedly connected to one side of the rotating rod 62. A second tooth cone 64 is meshingly connected to one side of the first tooth cone 63. A side frame 65 is fixedly connected to one end of the mounting plate 3 away from the mounting pipe 1. A rotating shaft 66 is rotatably connected to one side of the side frame 65. A torsion wheel 67 is fixedly connected to one end of the rotating shaft 66 away from the first groove 61. The positioning assembly 7 includes a second groove 71, which is opened on one side of the mounting plate 3. A first screw rod 72 is rotatably connected inside the second groove 71. One end of the first screw rod 72 is fixedly connected to one end of the rotating rod 62. A positioning rod 73 is threadedly connected to the outer surface of the first screw rod 72. One side of the positioning rod 73 is slidably connected to the inside of the second groove 71. One side of the positioning rod 73 extends into the inside of the connecting hole 14, and one side of the positioning rod 73 is inserted into the positioning hole 13. The interior of the positioning rod 73 is fixedly connected to the limiting blocks 74 on both sides, and the limiting blocks 74 are slidably connected to the interior of the second groove 71; by setting the driving component 6, a first groove 61 is provided on the mounting plate 3, and the rotating rod 62 is rotated in the first groove 61, and one side of the rotating rod 62 is fixed with the first gear cone 63, and one side of the first gear cone 63 engages with the second gear cone 64. The rotating shaft 66 connected to the second gear cone 64 rotates on the mounting plate 3 through the side frame 65, and the rotating shaft 66 is connected to the twist wheel 67. After the twist wheel 67 is rotated, the rotating shaft 66 can be rotated, so that the rotating shaft 66 drives the positioning components 7 on both sides to work. By setting the positioning component 7, the second groove 71 is provided on the mounting plate 3, and the second groove 71 rotates to the first screw rod 72, and the first screw rod 72 is fixed to the rotating rod 62. When the rotating rod 62 rotates, the first screw rod 72 rotates to move the positioning rod 73, so that the positioning rod 73 fixes or releases the fixation of the hook 12 to the hook 12, thereby achieving the purpose of disassembling and assembling the PCB board 4.

[0031] See also Figure 2 and Figure 5 Guide blocks 8 are fixedly connected to both sides of the interior of the mounting shell 2, guide grooves 9 are opened on both sides of the PCB board 4, and the guide blocks 8 are slidably connected to the guide grooves 9; by fixing the guide blocks 8 in the mounting shell 2, and opening guide grooves 9 on both sides of the PCB board 4, the guide blocks 8 slide in the guide grooves 9, which facilitates the installation of the PCB board 4 and makes the connection between the PCB board 4 and the mounting shell 2 more reliable.

[0032] See also Figure 3 and Figure 6The wiping assembly 10 includes a fixed block 101, which is fixedly connected to the upper end of the mounting shell 2, and a cylinder 102 is fixedly connected to the upper end of the fixed block 101, and a movable plate 103 is fixedly connected to the output end of the cylinder 102, and the movable plate 103 is movably connected to the inside of the mounting shell 2, and a wiping pad 104 is fixedly connected to one end of the movable plate 103, and one side of the wiping pad 104 is closely connected to one side of the optical transmitter 41; by setting the wiping assembly 10, the fixed block 101 is fixed on the mounting shell 2, and the fixed block 10 1, a cylinder 102 is installed on the housing 2, a moving plate 103 connected to the output end of the cylinder 102 is located in the mounting shell 2, and a wiping pad 104 is installed on the moving plate 103 to contact the mirror surface of the light transmitter 41, so the cylinder 102 can be used to drive the moving plate 103 to move, so that the moving plate 103 drives the wiping pad 104 to move back and forth to wipe the mirror surface of the light transmitter 41, remove stains such as dust and water film, ensure that the light transmitter 41 can receive signals normally, help the sensor to work stably for a long time, and reduce the frequency of maintenance and replacement.

[0033] See also Figure 6 , both sides of the upper end of the movable plate 103 are fixedly connected with movable tubes 106, both sides of the interior of the fixed block 101 are fixedly connected with fixed tubes 105, and one side of the movable tube 106 is slidably connected with the fixed tube 105; by installing the fixed tube 105 in the fixed block 101, the movable tube 106 installed on the movable plate 103, and the movable tube 106 sliding in the fixed tube 105, it is ensured that the movable plate 103 drives the wiping plate to move stably, avoiding deviation that affects the cleaning effect of the optical transmitter and the optical receiver.

[0034] See also Figure 7-8The collecting assembly 11 includes a collecting box 111, which is fixedly connected to one side of the PCB board 4, and slots 112 are provided on both sides of one end of the collecting box 111, and plug blocks 113 are fixedly connected to both sides of one end of the PCB board 4, and the plug blocks 113 are movably connected to the slots 112, and the internal threads of the slots 112 are connected to the second screw rod 114, and one end of the second screw rod 114 is fixedly connected to a torsion rod 116, and one side of the torsion rod 116 is movably connected to one side of the collecting box 111, and a screw groove 115 is provided on one side of the plug block 113, and one side of the second screw 114 is threadedly connected to the screw groove 115; by fixing the plug block 113 on the PCB board 4, the slots 112 are provided on the collecting box 111 , the plug block 113 is inserted into the slot 112 to connect the collection box 111 to the PCB board 4. When the PCB board 4 is inserted into the mounting shell 2, the collection box 111 blocks the opening below the mounting shell 2, so that the collection box 111 collects the fallen dust, which is convenient for maintenance and cleaning. By inserting the torsion bar 116 into the collection box 111, the second screw 114 on one side of the torsion bar 116 is extended into the slot 112, and the torsion bar 116 is rotated to rotate the second screw 114 so that the second screw 114 falls into the screw groove 115 of the plug block 113, the plug block 113 and the slot 112 can be fixed, and the collection box 111 and the PCB board 4 can be fixed. The collection box 111 can be removed from the PCB for maintenance later.

[0035] The working principle of the utility model is as follows: the PCB board 4 is inserted into the guide groove 9 of the mounting shell 2 through the guide block 8 to position the PCB board 4, the collection box 111 blocks the lower opening of the mounting shell 2, and at the same time, the hook 12 on the PCB board 4 is inserted into the connecting hole 14 of the mounting plate 3, and then the personnel rotates the twist wheel 67, the twist wheel 67 drives the rotating shaft 66 to rotate on the side frame 65, the rotating shaft 66 rotates the second gear cone 64, the second gear cone 64 rotates the first gear cone 63, the first gear cone 63 rotates the rotating shaft 66, the rotating shaft 66 drives the first screw rods 72 on both sides to rotate, so that the positioning rod 73 on the first screw rod 72 moves into the connecting hole 14, and the positioning rod 73 is inserted into the positioning hole 13 of the hook 12 for fixing, so that the PCB board 4 can be connected to the mounting shell 2. This design is not only convenient for disassembly of the PCB board 4, and convenient for maintenance personnel to quickly replace or repair it, saving maintenance time and improving maintenance efficiency, but also makes the connection of the mounting shell 2 stable and firm. The stable connection can ensure the stability and reliability of signal transmission, and avoid signal interference or data loss caused by poor connection. When the optical transmitter and the optical receiver need to be cleaned regularly, the cylinder 102 is used to drive the moving plate 103 to move, so that the moving plate 103 drives the wiping pad 104 to move, and the wiping pad 104 moves back and forth to wipe the mirror surface of the optical transmitter and the optical receiver to ensure that the mirror surface is clean, which can avoid the accumulation of dust, water film or chemicals and ensure the normal propagation of light, thereby improving the accuracy of liquid level measurement and helping the sensor to work stably for a long time.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipeline photoelectric liquid level sensor, comprising a mounting pipeline, characterized in that: A mounting shell is fixedly connected to one side of the mounting pipe, an optical board is fixedly connected to one side of the mounting shell, a PCB board is plugged into the other side of the mounting shell, one end of the PCB board is fixedly connected to an optical transmitter and receiver, a mounting plate is fixedly connected to the side of the mounting shell away from the pipe, hooks are fixedly connected to both sides of one end of the PCB board, a positioning hole is provided on one side of the hook, connecting holes are provided on both sides of one end of the mounting plate, one side of the hook is movably connected to the connecting holes, a driving assembly is fixedly connected to one side of the mounting plate, a positioning assembly is fixedly connected to the other side of the mounting plate, a wiping assembly is fixedly connected to one side of the mounting shell, one side of the wiping assembly is movably connected to one side of the optical transmitter and receiver, a collecting assembly is fixedly connected to one end of the PCB board away from the mounting plate, one side of the collecting assembly is located inside the mounting shell, and an electronic wire is fixedly connected to the lower end of the PCB board.

2. A pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The driving assembly includes a first groove, which is opened on one side of the mounting plate, a rotating rod is rotatably connected inside the first groove, a first tooth cone is fixedly connected to one side of the rotating rod, a second tooth cone is meshingly connected to one side of the first tooth cone, an end of the mounting plate away from the mounting pipe is fixedly connected to a side frame, one side of the side frame is rotatably connected to a rotating shaft, and an end of the rotating shaft away from the first groove is fixedly connected to a torsion wheel.

3. A pipeline photoelectric liquid level sensor according to claim 2, characterized in that: The positioning assembly includes a second groove, the second groove is opened on one side of the mounting plate, the inside of the second groove is rotatably connected with a first screw rod, one end of the first screw rod is fixedly connected to one end of a rotating rod, the outer surface of the first screw rod is threadedly connected with a positioning rod, one side of the positioning rod is slidably connected to the inside of the second groove, one side of the positioning rod extends into the inside of a connecting hole, and one side of the positioning rod is inserted into the inside of the positioning hole, both sides of the positioning rod are fixedly connected with a limiting block, and the limiting block is slidably connected to the inside of the second groove.

4. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: Guide blocks are fixedly connected to both sides of the interior of the installation shell, guide grooves are provided on both sides of the PCB board, 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 wiping assembly includes a fixed block, which is fixedly connected to the upper end of the mounting shell, the upper end of the fixed block is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to a movable plate, the movable plate is movably connected to the inside of the mounting shell, one end of the movable plate is fixedly connected to a wiping pad, and one side of the wiping pad is fit-connected to one side of the optical transmitter.

6. A pipeline photoelectric liquid level sensor according to claim 5, characterized in that: Both sides of the upper end of the movable plate are fixedly connected with movable tubes, both sides of the interior of the fixed block are fixedly connected with fixed tubes, and one side of the movable tube is slidably connected with the fixed tube.

7. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The collecting assembly comprises a collecting box, which is fixedly connected to one side of the PCB board. Slots are provided on both sides of one end of the collecting box. Insert blocks are fixedly connected to both sides of one end of the PCB board, and the insert blocks are movably connected to the slots.

8. The pipeline photoelectric liquid level sensor according to claim 7, characterized in that: The internal thread of the slot is connected to a second screw rod, one end of the second screw rod is fixedly connected to a torsion rod, one side of the torsion rod is movably connected to one side of the collection box, one side of the insert block is provided with a screw groove, and one side of the second screw rod is threadedly connected to the screw groove.

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