Photoelectric liquid level sensor for line protection

Abstract

The invention relates to the field of photoelectric liquid level sensors, and particularly discloses a line protection photoelectric liquid level sensor which comprises a sensor body, a display screen is arranged on the front face of the sensor body, the lower end of the sensor body is fixedly connected with a sensor wire, and the other end of the sensor wire is fixedly connected with a sensor plug. The upper end of the sensor plug and the lower end of the sensor body are fixedly connected with installation assemblies. By the adoption of the structure, the rotating handle is screwed to drive the adjusting screw rod to rotate, the adjusting screw rod rotates to push the first protection sleeve under the action of the adjusting screw hole in the surface of the adjusting disc, the first protection sleeve and the second protection sleeve are fixedly connected, and therefore the protection length can be increased when the first protection sleeve and the second protection sleeve are pushed; therefore, the protection length can be conveniently and flexibly adjusted, the practicability of the protection assembly is improved, and the use requirements of sensor wires with different lengths are met.

Description

Technical Field

[0001] The invention relates to the field of photoelectric liquid level sensors, in particular to a photoelectric liquid level sensor for line protection. Background Art

[0002] With the development of science and technology, various products have appeared in people's lives, such as electronic products, children's toys, daily necessities, lighting equipment, sensors, etc. These products solve various problems encountered in people's lives. Sensors are a product with a wide range of industrial applications and are very popular with users. However, the existing photoelectric liquid level sensors on the market need to detect the height of the liquid level through the refraction and reflection of the prism, and wire protection devices are required when using the sensors.

[0003] According to the Chinese patent with the announcement number "CN212968919U", a sensor wire protection component is disclosed, which particularly relates to the field of sensor wire protection technology, including a lower clamp frame and an upper clamp frame, both of which are U-shaped structures, and the upper clamp frame is symmetrically clamped on the upper end of the lower clamp frame, and the front and rear sides of the left and right ends of the lower clamp frame are fixedly connected with lower lock seats. By clamping the sensor wire with the lower clamp frame and the upper clamp frame, and then inserting the plug plate into the slot of the card strip, and then passing the screws through the first lock hole, the second lock hole and the third lock hole, it is convenient to install the lower clamp frame and the upper clamp frame to clamp the sensor wire. Conversely, when disassembling, you only need to remove the screws and then pull out the plug plate, so that it is convenient to remove the lower clamp frame and the upper clamp frame from the sensor wire, solving the technical problems existing in the prior art that it is too inconvenient to install on the sensor wire or disassemble from the sensor wire and it is inconvenient to adjust the clamping point on the sensor wire;

[0004] It can be known from the above structure that the above sensor wire protection component is to clamp the sensor wire with the lower clamp frame and the upper clamp frame, insert the plug plate into the slot of the card strip, and then use screws to pass through the first lock hole, the second lock hole and the third lock hole, so as to facilitate the installation of the lower clamp frame and the upper clamp frame to clamp the sensor wire. However, the sensor wires in the prior art are of different lengths, and the above device cannot be flexibly adjusted according to the length of the wire when in use, thereby reducing the practicality of the device. At the same time, it is inconvenient to install the protective device and the sensor wire, and it is impossible to install it quickly. Summary of the invention

[0005] The object of the present invention is to provide a photoelectric liquid level sensor for line protection, so as to solve the problem in the above-mentioned background technology that the wire protection length cannot be adjusted.

[0006] To achieve the above-mentioned purpose, the present invention provides a line protection photoelectric liquid level sensor, comprising a sensor body, a display screen is arranged on the front side of the sensor body, a sensor wire is fixedly connected to the lower end of the sensor body, a sensor plug is fixedly connected to the other end of the sensor wire, an installation assembly is fixedly connected to the upper end of the sensor plug and the lower end of the sensor body, a first protective sleeve and a second protective sleeve are fixedly connected to the inner side of the installation assembly, an adjustment assembly is fixedly connected to the outer side of the first protective sleeve, the adjustment assembly comprises a fixed disk arranged on one side of the outer surface of the first protective sleeve, an adjustment disk is fixedly connected to the other side of the outer surface of the first protective sleeve, an adjustment screw hole is opened on the outer surface of the adjustment disk, an adjustment screw is connected to the inner thread of the adjustment screw hole, the other end of the adjustment screw is rotatably connected to the fixed disk, and the other end of the adjustment screw passes through the fixed disk and is fixedly connected to a rotating handle.

[0007] In a further embodiment, the mounting assembly includes a plug-in frame arranged at the lower end of the sensor body and the upper end of the sensor plug, and both ends of the first protective sleeve and the second protective sleeve are fixedly connected with plug-in blocks, and the plug-in blocks and the plug-in frame are plugged into each other.

[0008] In a further embodiment, a circular groove is provided on the outer side of the plug-in block, a clamping spring is fixedly connected to the inside of the circular groove, a clamping joint is fixedly connected to the other end of the clamping spring, clamping holes are provided on both sides of the plug-in frame, and the clamping joint and the clamping hole are clamped to each other.

[0009] In a further embodiment, fixing grooves are provided at the outer corners of the plug-in frame, fixing screws are inserted into the fixing grooves, and the fixing screws penetrate the fixing grooves and are threadedly connected to the lower end of the sensor body and the upper end of the sensor plug.

[0010] In a further embodiment, mounting grooves are provided on both sides of the plug-in blocks at both ends of the first protective cover, mounting screws are inserted into the inside of the mounting grooves, and mounting screw holes are provided on both sides of the plug-in blocks at both ends of the second protective cover, and the mounting screws pass through the mounting grooves and are threadedly connected to the mounting screw holes.

[0011] In a further embodiment, the outer side of the plug-in frame is fixedly connected to release springs on both sides of the card-connecting hole, the other end of the release spring is fixedly connected to a pressing plate, the inner side of the pressing plate is fixedly connected to a release block, the release block and the card-connecting hole are plugged into each other, and the release block and the card joint are movably connected to each other.

[0012] In a further embodiment, the first protective cover and the second protective cover both include a fixed protective cover arranged on the inner side of the plug-in block, a telescopic slot is provided at the other end of the fixed protective cover, a sliding protective cover is inserted into the interior of the telescopic slot, and the fixed protective cover is slidably inserted on the outer surface of the sliding protective cover through the telescopic slot.

[0013] In a further embodiment, connecting plates are fixedly connected on both sides of the first protective cover and the second protective cover, connecting grooves are provided on the surfaces of the connecting plates on both sides of the first protective cover, connecting screws are inserted into the interior of the connecting grooves, and clamping grooves are provided on the surfaces of the connecting plates on both sides of the second protective cover, connecting nuts are inserted into the interior of the clamping grooves, and the connecting screws pass through the connecting grooves and are threadedly connected to the connecting plates and the connecting nuts.

[0014] In a further embodiment, the other end of the adjusting screw is threadedly connected to a limiting disk, the inner side of the limiting disk is fixedly connected to the limiting screw, the other end of the adjusting screw is provided with a limiting screw hole, and the limiting screw hole and the limiting screw are threadedly connected to each other.

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

[0016] Firstly, the present invention provides an adjustment component, a first protective sleeve and a second protective sleeve. When in use, the first protective sleeve and the second protective sleeve are installed with the sensor wire. After the installation is completed, the sensor wire can be protected by the fixed protective sleeve and the sliding protective sleeve. At the same time, when the distance between the sensor wires of the sensor body is long or short, the adjusting screw is driven to rotate by twisting the rotating handle. The rotation of the adjusting screw can push the first protective sleeve under the action of the adjusting screw hole on the surface of the adjusting disk. The first protective sleeve and the second protective sleeve are fixedly connected, so that the protection length can be increased when the first protective sleeve and the second protective sleeve are pushed, so that the protection length can be flexibly adjusted, thereby increasing the practicality of the protective component to meet the use of sensor wires of different lengths.

[0017] Secondly, according to the installation assembly provided in the present invention, after the installation and adjustment of the first protective cover and the second protective cover are completed, when the protective structure is fixed to the sensor body, the plug-in block is plugged into the interior of the plug-in frame. During the plug-in, the snap-in connector is squeezed into the interior of the circular groove. Then, after the plug-in block is completely inserted into the interior of the plug-in frame, the position of the snap-in hole is consistent with the position of the circular groove. At this time, the snap-in connector will pop out of the circular groove under the action of the snap-in spring, so that the snap-in connector and the snap-in hole are snap-fitted to achieve a snap-fitting effect, thereby enabling the first protective cover and the second protective cover to be installed, thereby increasing the installation efficiency of the first protective cover and the second protective cover during use, and at the same time, installation by snap-fitting makes disassembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a side view structural schematic diagram of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the regulating component in the present invention;

[0021] Figure 4 It is a schematic structural diagram of the second protective cover in the present invention;

[0022] Figure 5 It is a structural schematic diagram of the installation components in the present invention;

[0023] Figure 6 For the present invention Figure 2 A schematic diagram of the enlarged structure of part B;

[0024] Figure 7 For the present invention Figure 3 Schematic diagram of the enlarged structure of part C;

[0025] Figure 8 For the present invention Figure 1 Schematic diagram of the enlarged structure of part A.

[0026] In the figure: 1. sensor body; 111. display screen; 2. sensor wire; 3. sensor plug; 4. installation assembly; 41. plug-in block; 42. round groove; 43. snap-on spring; 44. snap-on joint; 45. plug-in frame; 46. snap-on hole; 5. first protective cover; 6. second protective cover; 61. fixed protective cover; 62. telescopic slot; 63. sliding protective cover; 7. adjustment assembly; 71. fixed plate; 72. adjustment plate; 73. adjustment screw hole; 74. adjustment screw; 75. turning handle; 8. installation slot; 9. installation screw; 10. installation screw hole; 11. connecting plate; 12. connecting slot; 13. connecting screw; 14. snap-on slot; 15. connecting nut; 16. fixing slot; 17. fixing screw; 18. release spring; 19. pressing plate; 20. release block; 21. limit screw hole; 22. limit plate; 23. limit screw. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 8In an embodiment of the present invention, a photoelectric liquid level sensor for line protection includes a sensor body 1, a display screen 111 is provided on the front of the sensor body 1, a sensor wire 2 is fixedly connected to the lower end of the sensor body 1, a sensor plug 3 is fixedly connected to the other end of the sensor wire 2, a mounting assembly 4 is fixedly connected to the upper end of the sensor plug 3 and the lower end of the sensor body 1, a first protective sleeve 5 and a second protective sleeve 6 are fixedly connected to the inner side of the mounting assembly 4, an adjustment assembly 7 is fixedly connected to the outer side of the first protective sleeve 5, the adjustment assembly 7 includes a fixing plate 71 provided on one side of the outer surface of the first protective sleeve 5, an adjustment plate 72 is fixedly connected to the other side of the outer surface of the first protective sleeve 5, an adjustment screw hole 73 is opened on the outer surface of the adjustment plate 72, an adjustment screw 74 is threadedly connected to the inner side of the adjustment screw hole 73, the other end of the adjustment screw 74 is rotatably connected to the fixing plate 71, and the other end of the adjustment screw 74 passes through the fixing plate 71 and is fixedly connected to a rotating handle 75.

[0029] See also Figure 3-Figure 6 The mounting assembly 4 includes a plug-in frame 45 arranged at the lower end of the sensor body 1 and the upper end of the sensor plug 3. Both ends of the first protective sleeve 5 and the second protective sleeve 6 are fixedly connected with a plug-in block 41. The plug-in block 41 and the plug-in frame 45 are plugged into each other. A circular groove 42 is provided on the outer side of the plug-in block 41. A clamping spring 43 is fixedly connected inside the circular groove 42. The other end of the clamping spring 43 is fixedly connected with a clamping joint 44. Both sides of the plug-in frame 45 are provided with clamping holes 46. The clamping joint 44 and the clamping holes 46 are clamped into each other. By plugging the plug-in block 41 into the plug-in frame 45, the snap-in connector 44 is squeezed into the circular groove 42 during plugging. After the plug-in block 41 is completely inserted into the plug-in frame 45, the position of the snap-in hole 46 is consistent with the position of the circular groove 42. At this time, the snap-in connector 44 pops out of the circular groove 42 under the action of the snap-in spring 43, so that the snap-in connector 44 and the snap-in hole 46 are snap-fitted, thereby achieving a snap-fitting effect, thereby enabling the first protective cover 5 and the second protective cover 6 to be installed.

[0030] See also Figure 5 A fixing groove 16 is provided at the outer corner of the plug-in frame 45, and a fixing screw 17 is inserted into the fixing groove 16. The fixing screw 17 passes through the fixing groove 16 and is threadedly connected to the lower end of the sensor body 1 and the upper end of the sensor plug 3; by passing the fixing screw 17 through the fixing groove 16 on the outer side of the plug-in frame 45 and threadingly connecting the sensor plug 3 and the sensor body 1, the plug-in frame 45 can be easily installed, and the threaded connection makes it more convenient to disassemble the plug-in frame 45.

[0031] See also Figure 3 and Figure 4, mounting grooves 8 are provided on both sides of the plug-in blocks 41 at both ends of the first protective sleeve 5, mounting screws 9 are inserted inside the mounting grooves 8, mounting screw holes 10 are provided on both sides of the plug-in blocks 41 at both ends of the second protective sleeve 6, and the mounting screws 9 pass through the mounting grooves 8 and are threadedly connected with the mounting screw holes 10; by passing the mounting screws 9 through the mounting grooves 8 and threadedly connecting the mounting screw holes 10 on the surface of the plug-in blocks 41 at both ends of the second protective sleeve 6, the plug-in blocks 41 can be assembled, and the sensor wires 2 can also be clamped and wrapped, so that the plug-in blocks 41 are fixed together to increase the stability of the plug-in blocks 41.

[0032] See also Figure 5 The outer side of the plug-in frame 45 is located on both sides of the clamping hole 46 and is fixedly connected with a release spring 18, the other end of the release spring 18 is fixedly connected with a pressing plate 19, and the inner side of the pressing plate 19 is fixedly connected with a release block 20, the release block 20 and the clamping hole 46 are plugged into each other, and the release block 20 and the clamping joint 44 are movably connected to each other; when disassembling the first protective cover 5 and the second protective cover 6, the pressing plate 19 is pressed downward so that the release block 20 on the inner side of the pressing plate 19 enters the inside of the clamping hole 46, and after the release block 20 enters the inside of the clamping hole 46, the clamping joint 44 can be pushed out of the clamping hole 46, so that after the clamping hole 46 and the clamping joint 44 are released from the clamping, the first protective cover 5 and the second protective cover 6 can be easily disassembled.

[0033] See also Figure 1-Figure 4 The first protective sleeve 5 and the second protective sleeve 6 both include a fixed protective sleeve 61 arranged on the inner side of the plug-in block 41, and a telescopic slot 62 is provided at the other end of the fixed protective sleeve 61, and a sliding protective sleeve 63 is inserted into the interior of the telescopic slot 62, and the fixed protective sleeve 61 is slidably inserted on the outer surface of the sliding protective sleeve 63 through the telescopic slot 62; the first protective sleeve 5 and the second protective sleeve 6 are provided so that the sensor wire 2 can be protected, and the slidable sliding protective sleeve 63 inserted into the interior of the first fixed protective sleeve 61 can indirectly adjust the fixed protective sleeves 61 on both sides, so that the use of sensor wires 2 of different lengths can be satisfied, thereby increasing the practicality of the first protective sleeve 5 and the second protective sleeve 6 and achieving a better protective effect.

[0034] See also Figure 3 and Figure 4, both sides of the first protective sleeve 5 and the second protective sleeve 6 are fixedly connected with connecting plates 11, and the surfaces of the connecting plates 11 on both sides of the first protective sleeve 5 are provided with connecting grooves 12, and connecting screws 13 are inserted inside the connecting grooves 12, and the surfaces of the connecting plates 11 on both sides of the second protective sleeve 6 are provided with clamping grooves 14, and connecting nuts 15 are inserted inside the clamping grooves 14. The connecting screws 13 pass through the connecting grooves 12 and are threadedly connected to the connecting plates 11 and the connecting nuts 15; when the first protective sleeve 5 and the second protective sleeve 6 are fixed, the connecting screws 13 are inserted into the connecting grooves 12, and the connecting screws 13 pass through the connecting grooves 12 and are threadedly connected to the connecting plates 11 and the connecting nuts 15, so that the first protective sleeve 5 and the second protective sleeve 6 can be fixed, and then the sensor wire 2 is wrapped under the action of the first protective sleeve 5 and the second protective sleeve 6, so as to achieve an effective protection effect.

[0035] See also Figure 7 and Figure 8 The other end of the adjusting screw 74 is threadedly connected to the limiting disk 22, and the inner side of the limiting disk 22 is fixedly connected to the limiting screw 23. The other end of the adjusting screw 74 is provided with a limiting screw hole 21, and the limiting screw hole 21 and the limiting screw 23 are threadedly connected to each other; the setting of the limiting disk 22 makes it possible to limit the adjusting screw 74 during use, thereby avoiding the situation where the limiting screw 23 is twisted too much and causes the adjusting screw 74 to disengage from the adjusting screw hole 73, and the installation through the limiting screw 23 and the limiting screw hole 21 makes it more convenient to disassemble the limiting disk 22.

[0036] The working principle of the present invention is: first, by inserting the connecting screw 13 into the inside of the connecting groove 12, the connecting screw 13 passes through the connecting groove 12 and is threadedly connected with the connecting plate 11 and the connecting nut 15, so that the first protective sleeve 5 and the second protective sleeve 6 can be fixed, and then the sensor wire 2 is wrapped under the action of the first protective sleeve 5 and the second protective sleeve 6, so that an effective protective effect can be achieved, and then the mounting screw 9 passes through the mounting groove 8 and the mounting screw hole 10 on the surface of the plug-in block 41 at both ends of the second protective sleeve 6 is threadedly connected, so that the plug-in block 41 can be assembled, and at the same time, the sensor wire 2 can be clamped and wrapped, so that the plug-in block 41 is fixed together to increase the plug-in block 4. 1, and then the fixing screw 17 is passed through the fixing groove 16 on the outside of the plug-in frame 45 to be threadedly connected with the sensor plug 3 and the sensor body 1, so that the plug-in frame 45 can be easily installed, and then the plug-in block 41 is plugged into the inside of the plug-in frame 45. During the plug-in, the card connector 44 is squeezed into the inside of the circular groove 42, and then after the plug-in block 41 is completely inserted into the inside of the plug-in frame 45, the position of the card hole 46 is consistent with the position of the circular groove 42. At this time, the card connector 44 will pop out of the circular groove 42 under the action of the card spring 43, so that the card connector 44 and the card hole 46 are carded, so that the card effect can be achieved, and then the first protective cover 5 and the second protective cover 6 can be installed, so that After the installation is completed, the protection effect can be achieved. The first protective sleeve 5 and the second protective sleeve 6 are provided so that the sensor wire 2 can be protected. At the same time, the slidable sliding protective sleeve 63 inserted in the first fixed protective sleeve 61 can indirectly adjust the fixed protective sleeves 61 on both sides, so that the use of sensor wires 2 of different lengths can be satisfied, thereby increasing the practicality of the first protective sleeve 5 and the second protective sleeve 6 and the protection effect is better. When facing the sensor body 1 with different sensor wires 2, the adjusting screw 74 is driven to rotate by twisting the rotating handle 75. The rotation of the adjusting screw 74 can push the first protective sleeve 5 under the action of the adjusting screw hole 73 on the surface of the adjusting disk 72, and the first protective sleeve 5 and the second protective sleeve are connected. The sleeve 6 is fixedly connected, so that the protection length can be increased when the first protective sleeve 5 and the second protective sleeve 6 are pushed, so that the protection length can be flexibly adjusted, thereby increasing the practicality of the protection component to meet the use of sensor wires 2 of different lengths, and the setting of the limit plate 22 allows the first adjusting screw 74 to have a limiting effect when in use, avoiding the situation where the limiting screw 23 is twisted too much and the adjusting screw 74 is disengaged from the adjusting screw hole 73, and the installation through the limiting screw 23 and the limiting screw hole 21 makes it more convenient to disassemble the limiting plate 22, and when the first protective sleeve 5 and the second protective sleeve 6 need to be disassembled, the pressing plate 19 is pressed downward so that the release block 20 on the inner side of the pressing plate 19 enters the inside of the clamping hole 46,After the release block 20 enters the interior of the clamping hole 46, the clamping joint 44 can be pushed out of the clamping hole 46, so that the first protective cover 5 and the second protective cover 6 can be easily disassembled after the clamping hole 46 and the clamping joint 44 are released from the clamping hole 46.

Claims

1. A photoelectric liquid level sensor for line protection, characterized in that: The invention comprises a sensor body, a display screen is arranged on the front side of the sensor body, a sensor wire is fixedly connected to the lower end of the sensor body, a sensor plug is fixedly connected to the other end of the sensor wire, a mounting assembly is fixedly connected to the upper end of the sensor plug and the lower end of the sensor body, a first protective sleeve and a second protective sleeve are fixedly connected to the inner side of the mounting assembly, an adjusting assembly is fixedly connected to the outer side of the first protective sleeve, the adjusting assembly comprises a fixing plate arranged on one side of the outer surface of the first protective sleeve, an adjusting plate is fixedly connected to the other side of the outer surface of the first protective sleeve, an adjusting screw hole is opened on the outer surface of the adjusting plate, an adjusting screw is connected to the inner thread of the adjusting screw hole, the other end of the adjusting screw is rotatably connected to the fixing plate, and the other end of the adjusting screw passes through the fixing plate and is fixedly connected to a rotating handle.

2. The photoelectric liquid level sensor for line protection according to claim 1, characterized in that: The mounting assembly comprises a plug-in frame arranged at the lower end of the sensor body and the upper end of the sensor plug, and both ends of the first protective sleeve and the second protective sleeve are fixedly connected with plug-in blocks, and the plug-in blocks and the plug-in frame are plugged into each other.

3. The photoelectric liquid level sensor for line protection according to claim 2, characterized in that: A circular groove is provided on the outer side of the plug-in block, a clamping spring is fixedly connected to the inside of the circular groove, a clamping joint is fixedly connected to the other end of the clamping spring, clamping holes are provided on both sides of the plug-in frame, and the clamping joint and the clamping holes are clamped to each other.

4. The photoelectric liquid level sensor for line protection according to claim 3, characterized in that: The outer corners of the plug-in frame are all provided with fixing grooves, and fixing screws are inserted into the fixing grooves. The fixing screws penetrate the fixing grooves and are threadedly connected with the lower end of the sensor body and the upper end of the sensor plug.

5. The photoelectric liquid level sensor for line protection according to claim 4, characterized in that: The plug-in blocks at both ends of the first protective cover are provided with installation grooves on both sides of the surface, and installation screws are inserted into the interior of the installation grooves. The plug-in blocks at both ends of the second protective cover are provided with installation screw holes on both sides, and the installation screws pass through the installation grooves and are threadedly connected with the installation screw holes.

6. The photoelectric liquid level sensor for line protection according to claim 5, characterized in that: The outer side of the plug-in frame is fixedly connected with release springs on both sides of the card hole, the other end of the release spring is fixedly connected with a pressing plate, the inner side of the pressing plate is fixedly connected with a release block, the release block and the card hole are plugged into each other, and the release block and the card joint are movably connected to each other.

7. The photoelectric liquid level sensor for line protection according to claim 1, characterized in that: The first protective sleeve and the second protective sleeve both include a fixed protective sleeve arranged on the inner side of the plug-in block, and a telescopic slot is opened at the other end of the fixed protective sleeve, and a sliding protective sleeve is inserted into the inside of the telescopic slot. The fixed protective sleeve is slidably inserted on the outer surface of the sliding protective sleeve through the telescopic slot.

8. The photoelectric liquid level sensor for line protection according to claim 7, characterized in that: Both sides of the first protective cover are fixedly connected with connecting plates, the surfaces of the connecting plates on both sides of the first protective cover are provided with connecting grooves, and connecting screws are inserted into the interior of the connecting grooves, and the surfaces of the connecting plates on both sides of the second protective cover are provided with clamping grooves, and connecting nuts are inserted into the interior of the clamping grooves, and the connecting screws pass through the connecting grooves and are threadedly connected to the connecting plates and the connecting nuts.

9. The photoelectric liquid level sensor for line protection according to claim 1, characterized in that: The other end of the adjusting screw is threadedly connected to the limiting disk, the inner side of the limiting disk is fixedly connected to the limiting screw, the other end of the adjusting screw is provided with a limiting screw hole, and the limiting screw hole and the limiting screw are threadedly connected to each other.

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