Photoelectric liquid level sensor for line protection

Abstract

The invention relates to the technical field of photoelectric liquid level sensors, and particularly discloses a line-protected photoelectric liquid level sensor which comprises a photoelectric liquid level sensor body, one side of the photoelectric liquid level sensor body is fixedly connected with a lens, and the other side of the photoelectric liquid level sensor body is fixedly connected with a line box. When the photoelectric liquid level sensor monitors that liquid is abnormal, the motor is used for driving the transmission rod to rotate, the transmission rod drives the two worms to rotate, the worms drive the worm wheels to rotate, the worm wheels drive the lead screws to rotate on the mounting frame, the transmission block moves under the action of the lead screws, and the liquid is conveyed to the liquid level sensor. The transmission block drives the first connecting rod to move, so that the first connecting rod drives the butt joint female plug to leave the butt joint male plug to complete line disconnection work, at the moment, the photoelectric liquid level sensor stops working, the line safety is effectively protected, further potential safety hazards caused by continuous working of the sensor are prevented, and accident expansion is prevented. And the safety of personnel and equipment is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of optoelectronic liquid level sensors, and in particular to an optoelectronic liquid level sensor with circuit protection. Background Art

[0002] An optoelectronic liquid level sensor is a new type of contact point liquid level measurement and control device that utilizes the principle of reflection and refraction of light at the interface of two different media. Specifically, it includes a light emitting tube, a light receiving tube, a lens, and a signal processing circuit. The light emitting tube emits light, which is focused by the lens and then irradiates the liquid surface to be measured. The light receiving tube receives the light reflected from the liquid surface and converts it into an electrical signal. The signal processing circuit processes the received electrical signal to obtain the liquid level information.

[0003] For example, the Chinese patent with the publication number CN213021828U discloses an optoelectronic liquid level sensor, which includes a water tank and a new type of optoelectronic liquid level sensor installed at the bottom of the water tank. A conical lens is fixedly installed inside the housing. A fastening bolt fixes a wire inside the housing. A waterproof film is arranged outside the conical lens. An infrared light emitting diode and a photosensitive receiver are fixedly arranged inside the housing. The infrared light emitting diode and the photosensitive receiver are electrically connected to the wire respectively. The water tank is provided with a conical sealing groove at the position where it abuts against the housing. The housing is fixedly provided with a rubber sealing ring at the position corresponding to the conical sealing groove. A buffer pad is fixedly arranged at the bottom of the conical sealing groove.

[0004] Although the above-mentioned disclosed patent solves the problem that when the existing optoelectronic liquid level sensor is used for a long time, when the liquid to be detected is water and the water level is lower than the critical liquid level, water droplets will accumulate on the surface of the conical lens, thus affecting the accuracy of signal reception, there are still some defects that need to be improved. At present, it has become normal to monitor the liquid level through an optoelectronic liquid level sensor. Once the liquid level is abnormal, the system will quickly transmit an alarm signal to make a response. However, the problem is that when there are multiple alarm signals in the system at the same time, these signals may be ignored due to mutual interference, reducing the accuracy of the alarm system. In addition, when the liquid level is abnormal, the optoelectronic liquid level sensor continues to work without power-off, bringing many potential safety hazards. For example, when the liquid level in the storage tank is too high and the liquid overflows, it may cause dangerous situations such as fire and explosion, which is not conducive to the safety protection and long-term stable operation of the circuit. Summary of the Invention

[0005] The purpose of the present invention is to provide an optoelectronic liquid level sensor with circuit protection to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides an optoelectronic liquid level sensor for line protection, comprising an optoelectronic liquid level sensor body. A lens is fixedly connected to one side of the optoelectronic liquid level sensor body, and a line box is fixedly connected to the other side of the optoelectronic liquid level sensor body. A first wire is fixedly connected to the side of the line box away from the optoelectronic liquid level sensor body. A docking female plug is fixedly connected to one side of the first wire. A docking male plug is inserted into one side of the docking female plug. A second wire is fixedly connected to one side of the docking male plug. Mounting frames are fixedly connected to both sides of the docking male plug. A disconnection mechanism is provided on one side of the mounting frame. Moving blocks are slidably connected to both sides of the mounting frame through the disconnection mechanism. A first connecting rod is fixedly connected to one side of the moving block. A connection mechanism is provided between the first connecting rod and the docking female plug. A second connecting rod is fixedly connected to the other side of the moving block. An alarm mechanism is provided between the second connecting rod and the docking male plug;

[0007] The disconnection mechanism includes a motor. The motor is fixedly connected to one side of the mounting frame. The output end of the motor is fixedly connected to a transmission rod. The transmission rod is rotatably connected to the mounting frame. Worms are fixedly connected to both sides of the transmission rod. A worm gear is meshed and connected to one side of the worm. A lead screw is fixedly connected to one side of the worm gear. The lead screw is rotatably connected to the side of the mounting frame away from the transmission rod. The moving block is threadedly connected to the lead screw.

[0008] Furthermore, the connection mechanism includes a connection seat. The connection seat is fixedly connected to both sides of the docking female plug. A connection groove is formed inside the connection seat. A connection block is inserted into the connection groove. One side of the connection block is fixedly connected to one side of the first connecting rod. A positioning component is provided on one side of the connection seat. The connection block and the connection groove are fixedly connected through the positioning component. The positioning component includes a positioning groove. The positioning groove is formed inside the connection block. A positioning rod is inserted into the positioning groove. The positioning rod is slidably connected inside the connection seat. A screw rod is rotatably connected to one side of the connection seat. A slider is threadedly connected to the outer surface of the screw rod. The slider is slidably connected inside the connection seat. One side of the slider is fixedly connected to one side of the positioning rod. A torsion wheel is fixedly connected to the top end of the screw rod.

[0009] Furthermore, the alarm mechanism includes a mounting block. The mounting block is fixedly connected to the top end of the docking male plug. An alarm lamp is fixedly connected to one side of the mounting block. A touch switch is installed on the other side of the mounting block. A touch rod is in movable contact with one side of the touch switch. A transmission block is fixedly connected to one side of the touch rod. A spring is fixedly connected between the transmission block and the mounting block, and the spring is sleeved on the outside of the touch rod. A pushing component is provided on one side of the transmission block.

[0010] Further, the pushing component includes a concave frame fixedly connected to the second connecting rod. One side of the concave frame is fixedly connected with a transmission column, and one side of the transmission column is in movable contact with one side of the transmission block. A square groove is formed inside the transmission block, and a square block is inserted into the square groove. One side of the square block is fixedly connected with one side of the transmission column. Guide blocks are fixedly connected to both sides of the transmission block, and a limiting rod is fixedly connected to one side of the mounting block close to the guide block. The guide block is slidably connected to the limiting rod.

[0011] Further, both sides of the mounting frame are fixedly connected with sliding rods, and two sliding rods are symmetrically arranged with respect to the lead screw. One side of the moving block is slidably connected to the sliding rod.

[0012] Further, a docking groove is formed on one side of the docking female plug, and a docking block is inserted into the docking groove. One side of the docking block is fixedly connected with one side of the docking male plug.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] First, in the present invention, by installing a docking female plug on the first wire of the optoelectronic liquid level sensor, the docking female plug is connected to the docking male plug, and the docking male plug is connected to the power supply through the second wire. When the optoelectronic liquid level sensor detects abnormal liquid, the motor drives the transmission rod to rotate, the transmission rod drives two worm gears to rotate, the worm gears drive the worm wheels to rotate, and the worm wheels drive the lead screw to rotate on the mounting frame, so that the transmission block moves under the action of the lead screw. The transmission block drives the first connecting rod to move, and the first connecting rod drives the docking female plug to leave the docking male plug to complete the line disconnection work. At this time, the optoelectronic liquid level sensor stops working, effectively protecting the safety of the line, preventing further safety hazards caused by the continuous operation of the sensor, preventing the expansion of accidents, and protecting the safety of personnel and equipment.

[0015] Second, in the present invention, when the docking male plug and the docking female plug are separated by the disconnection mechanism, the transmission block drives the second connecting rod to move, and the second connecting rod drives the pushing component to work. The pushing component contacts the transmission block, and the transmission block deforms through the spring on the mounting block, so that the transmission block drives the touch rod to move. The touch rod contacts the touch switch on the mounting block, and the alarm lamp on the mounting block here alarms to prompt the staff. By adopting a mechanical disconnection method, even if there are multiple alarm signals in the system at the same time, the mutual interference between signals can be effectively avoided, thereby improving the accuracy and timeliness of the alarm system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic connection structure diagram of the connecting side of the docking male plug and the docking female plug in the present invention;

[0018] Figure 3 Schematic diagram of the structure on the other side of the docking male plug and the docking female plug in the present invention;

[0019] Figure 4 Schematic diagram of the partial structure of the alarm mechanism in the present invention;

[0020] Figure 5 Schematic diagram of the sectional structure of the mounting block in the present invention;

[0021] Figure 6 In the present invention Figure 1 Schematic diagram of the enlarged structure at position A;

[0022] Figure 7 In the present invention Figure 1 Schematic diagram of the enlarged structure at position B;

[0023] Figure 8 In the present invention Figure 1 Schematic diagram of the enlarged structure at position C.

[0024] In the figure: 1. Photoelectric liquid level sensor body; 2. Lens; 3. Line box; 4. First wire; 5. Docking female plug; 6. Docking male plug; 7. Second wire; 8. Moving block; 9. First connecting rod; 10. Connecting mechanism; 101. Connecting seat; 102. Connecting groove; 103. Connecting block; 104. Positioning component; 1041. Positioning groove; 1042. Positioning rod; 1043. Slide block; 1044. Screw rod; 1045. Torsion wheel; 11. Second connecting rod; 12. Alarm mechanism; 121. Alarm lamp; 122. Mounting block; 123. Touch switch; 124. Touch rod; 125. Spring; 126. Transmission block; 1261. Square groove; 127. Pushing component; 1271. Concave frame; 1272. Transmission column; 1273. Square block; 13. Mounting frame; 14. Disconnecting mechanism; 141. Motor; 142. Transmission rod; 143. Worm; 144. Worm gear; 145. Lead screw; 146. Slide bar; 15. Docking groove; 16. Docking block; 17. Guide block; 18. Limiting rod. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-8, in the embodiments of the present invention, an optoelectronic liquid level sensor for line protection includes an optoelectronic liquid level sensor body 1. A lens 2 is fixedly connected to one side of the optoelectronic liquid level sensor body 1, and a line box 3 is fixedly connected to the other side of the optoelectronic liquid level sensor body 1. Inside the line box 3, there are a light emitting tube, a light receiving tube, an intelligent judgment module, etc. The intelligent judgment module includes a microprocessor, a memory, an input / output interface, etc. The microprocessor makes an intelligent judgment based on a preset liquid level threshold and the actually detected liquid level value, and when the liquid level is abnormal, it sends a control signal to the total control system through the input / output interface to make the disconnection mechanism 14 work. A first wire 4 is fixedly connected to the side of the line box 3 away from the optoelectronic liquid level sensor body 1. A docking female plug 5 is fixedly connected to one side of the first wire 4. A docking male plug 6 is inserted into one side of the docking female plug 5. A second wire 7 is fixedly connected to one side of the docking male plug 6. Mounting brackets 13 are fixedly connected to both sides of the docking male plug 6. A disconnection mechanism 14 is provided on one side of the mounting bracket 13. Moving blocks 8 are slidably connected to both sides of the mounting bracket 13 through the disconnection mechanism 14. A first connecting rod 9 is fixedly connected to one side of the moving block 8. A connection mechanism 10 is provided between the first connecting rod 9 and the docking female plug 5. A second connecting rod 11 is fixedly connected to the other side of the moving block 8. An alarm mechanism 12 is provided between the second connecting rod 11 and the docking male plug 6. The disconnection mechanism 14 includes a motor 141. The motor 141 is fixedly connected to one side of the mounting bracket 13. The output end of the motor 141 is fixedly connected to a transmission rod 142. The transmission rod 142 is rotatably connected to the mounting bracket 13. Worms 143 are fixedly connected to both sides of the transmission rod 142. A worm gear 144 is meshed and connected to one side of the worm 143. A lead screw 145 is fixedly connected to one side of the worm gear 144. The lead screw 145 is rotatably connected to the side of the mounting bracket 13 away from the transmission rod 142. The moving block 8 is threadedly connected to the lead screw 145.

[0027] Please refer to Figure 7, the connecting mechanism 10 includes a connecting seat 101. The connecting seat 101 is fixedly connected to both sides of the docking female plug 5. A connecting groove 102 is formed inside the connecting seat 101. A connecting block 103 is inserted into the connecting groove 102. One side of the connecting block 103 is fixedly connected to one side of the first connecting rod 9. A positioning component 104 is provided on one side of the connecting seat 101. The connecting block 103 and the connecting groove 102 are fixedly connected by the positioning component 104. The positioning component 104 includes a positioning groove 1041 formed inside the connecting block 103. A positioning rod 1042 is inserted into the positioning groove 1041. The positioning rod 1042 is slidably connected inside the connecting seat 101. A screw rod 1044 is rotatably connected to one side of the connecting seat 101. A slider 1043 is threadedly connected to the outer surface of the screw rod 1044. The slider 1043 is slidably connected inside the connecting seat 101. One side of the slider 1043 is fixedly connected to one side of the positioning rod 1042. The top of the screw rod 1044 is fixedly connected to a torsion wheel 1045; by providing the connecting mechanism 10, when it is necessary to completely separate the docking male plug 6 and the docking female plug 5, rotate the torsion wheel 1045 to drive the screw rod 1044 to rotate, so that the screw rod 1044 drives the slider 1043 to move, and the slider 1043 drives the positioning rod 1042 to move, so that the positioning rod 1042 leaves the positioning groove 1041 of the connecting block 103. At this time, the connecting block 103 and the connecting groove 102 are no longer fixed. At this time, the first connecting rod 9 can be separated from the connecting seat 101, so as to separate the docking male plug 6 and the docking female plug 5. When it is necessary to connect the docking male plug 6 and the docking female plug 5, the connecting block 103 enters the connecting groove 102 of the connecting seat 101. Rotate the torsion wheel 1045 to drive the screw rod 1044 to rotate, so that the slider 1043 drives the positioning rod 1042 to move, and the positioning rod 1042 is inserted into the positioning groove 1041 to complete the fixation of the first connecting rod 9 and the connecting seat 101, and then the disconnecting mechanism 14 can drive the docking female plug 5 to move.

[0028] Please refer to Figure 4 , Figure 5 , Figure 8The alarm mechanism 12 includes a mounting block 122, the mounting block 122 is fixedly connected to the top of the docking male plug 6, one side of the mounting block 122 is fixedly connected to an alarm light 121, and the other side of the mounting block 122 is installed with a touch switch 123, one side of the touch switch 123 is movably in contact with a touch rod 124, one side of the touch rod 124 is fixedly connected to a transmission block 126, a spring 125 is fixedly connected between the transmission block 126 and the mounting block 122, and the spring 125 is sleeved on the outside of the touch rod 124, and one side of the transmission block 126 is provided with a pushing component 127; by setting the alarm mechanism 12, the male plug 6 and the female plug 5 are docked during the process , the disconnecting mechanism 14 drives the transmission block 126 to move, and at the same time, the transmission block 126 drives the second connecting rod 11 to move, so that the pushing assembly 127 drives the transmission block 126 to move, and the transmission block 126 pushes the spring 125 to deform, so that the transmission block 126 drives the touch rod 124 to move and contact with the touch switch 123 on the mounting block 122, and the touch switch 123 makes the alarm light 121 flash, which can notify the staff in time and help the staff find the photoelectric liquid level sensor here. When the docking male plug 6 and the docking female plug 5 are docked, the transmission block 126 is reset under the action of the spring 125, so that the transmission block 126 drives the positioning rod 1042 to leave the touch switch 123, and the alarm is released.

[0029] See also Figure 8 The pushing assembly 127 includes a recessed frame 1271, which is fixedly connected to the second connecting rod 11, a transmission column 1272 is fixedly connected to one side of the recessed frame 1271, and one side of the transmission column 1272 is in active contact with one side of the transmission block 126. A square groove 1261 is provided inside the transmission block 126, and a square block 1273 is inserted inside the square groove 1261. One side of the square block 1273 is fixedly connected to one side of the transmission column 1272. Both sides of the transmission block 126 are fixedly connected to guide blocks 17, and the mounting block 122 is close to the guide block 17. A limit rod 18 is fixedly connected to one side, and the guide block 17 is slidably connected to the limit rod 18; by setting the pushing assembly 127, the second connecting rod 11 drives the recessed frame 1271 to move, and the recessed frame 1271 drives the transmission column 1272 to move, and the square block 1273 on the transmission column 1272 contacts the square groove 1261 of the transmission block 126, which helps the transmission column 1272 to push the transmission block 126 to move, thereby facilitating the touch rod 124 to contact the touch switch 123. The guide block 17 and the limit rod 18 are set, so that the touch rod 124 can stably contact the touch switch 123, which is conducive to triggering the alarm.

[0030] See also Figure 6, both sides of the mounting bracket 13 are fixedly connected with sliding rods 146, and two sliding rods 146 are symmetrically arranged with respect to the lead screw 145. One side of the moving block 8 is slidably connected to the sliding rod 146; by providing the sliding rod 146, the transmission block 126 can move horizontally on the mounting bracket 13, preventing the transmission block 126 from rotating with the rotation of the lead screw 145.

[0031] Please refer to Figures 2-3 , a docking groove 15 is formed on one side of the docking female plug 5, a docking block 16 is inserted into the interior of the docking groove 15, and one side of the docking block 16 is fixedly connected to one side of the docking male plug 6; by providing the docking groove 15 and the docking block 16, a rubber pad is fixed in the docking groove 15. After the docking block 16 is connected to the docking groove 15, the docking male plug 6 and the docking female plug 5 are connected more tightly.

[0032] The working principle of the present invention is as follows: The optoelectronic liquid level sensor body 1 emits and receives optical signals through the lens 2. The intelligent judgment module analyzes the liquid level data in real time. When the liquid level exceeds the preset threshold, the microprocessor sends a control signal to the total control system to activate the disconnection mechanism 14. After receiving the signal, the motor 141 of the disconnection mechanism 14 starts and drives the transmission rod 142 to rotate. The transmission rod 142 drives the two-sided worm 143 to rotate. The worm 143 meshes with the worm wheel 144 to drive the worm wheel 144 to rotate. The worm wheel 144 drives the lead screw 145 to rotate on the mounting bracket 13. When the transmission block 126 moves horizontally through the slide bar 146, the docking female plug 5 is pulled by the first connecting rod 9, causing it to separate from the docking male plug 6 and cutting off the circuit. When the transmission block 126 moves, the concave frame 1271 is driven to move synchronously through the second connecting rod 11. The transmission column 1272 on the concave frame 1271 contacts the square groove 1261 of the transmission block 126 through the square block 1273, pushing the transmission block 126 to move towards the mounting block 122. The transmission block 126 compresses the spring 125, driving the touch rod 124 to contact the touch switch 123 on the mounting block 122. The touch switch 123 triggers the alarm lamp 121 to flash, prompting the staff of the abnormality. The guide block 17 cooperates with the limit rod 18 to ensure the stable movement direction of the transmission block 126 and ensure the reliable contact between the touch rod 124 and the touch switch 123. When the abnormality is eliminated or the maintenance is completed, the disconnection mechanism 14 pushes the docking female plug 5 closer to the docking male plug 6. After the docking block 16 is inserted into the docking groove 15 and the male and female docking plugs 5 are docked, the transmission block 126 resets under the action of the spring 125, the touch rod 124 disengages from the touch switch 123, and the alarm lamp 121 stops flashing. By mechanically disconnecting the circuit, it is possible to prevent potential safety hazards caused by the continuous operation of the sensor and avoid the expansion of accidents. By adopting a mechanical triggering method, it is possible to avoid the mutual interference of multiple alarm signals and ensure accurate and timely alarming. When it is necessary to completely separate the docking male plug 6 and the docking female plug 5, the torsion wheel 1045 is rotated to drive the screw 1044 to rotate, causing the screw 1044 to drive the slider 1043 to move. The slider 1043 drives the positioning rod 1042 to move, causing the positioning rod 1042 to leave the positioning groove 1041 of the connecting block 103. At this time, the connecting block 103 and the connecting groove 102 are no longer fixed. At this time, the first connecting rod 9 can be separated from the connecting seat 101, so that the docking male plug 6 and the docking female plug 5 are separated, and the first wire 4 and the second wire 7 are separated, facilitating the subsequent maintenance of the optoelectronic liquid level sensor body 1.

Claims

1. A photoelectric liquid level sensor for line protection, characterized in that: The invention comprises a photoelectric liquid level sensor body, a lens is fixedly connected to one side of the photoelectric liquid level sensor body, a circuit box is fixedly connected to the other side of the photoelectric liquid level sensor body, a first wire is fixedly connected to the side of the circuit box away from the photoelectric liquid level sensor body, a docking female plug is fixedly connected to one side of the first wire, a docking male plug is plugged into one side of the docking female plug, a second wire is fixedly connected to one side of the docking male plug, a mounting frame is fixedly connected to both sides of the docking male plug, a disconnection mechanism is provided on one side of the mounting frame, a moving block is slidably connected to both sides of the mounting frame through the disconnection mechanism, a first connecting rod is fixedly connected to one side of the moving block, a connecting mechanism is provided between the first connecting rod and the docking female plug, a second connecting rod is fixedly connected to the other side of the moving block, and an alarm mechanism is provided between the second connecting rod and the docking male plug; The disconnect mechanism includes a motor, which is fixedly connected to one side of the mounting frame, and the output end of the motor is fixedly connected to a transmission rod, and the transmission rod is rotatably connected to the mounting frame, and worms are fixedly connected to both sides of the transmission rod, and one side of the worm is meshingly connected to a worm wheel, and one side of the worm wheel is fixedly connected to a lead screw, and the lead screw is rotatably connected to a side of the mounting frame away from the transmission rod, and the moving block is threadedly connected to the lead screw.

2. The photoelectric liquid level sensor for line protection according to claim 1, characterized in that: The connecting mechanism includes a connecting seat, which is fixedly connected to both sides of the docking female plug. A connecting groove is opened inside the connecting seat, and a connecting block is inserted into the connecting groove. One side of the connecting block is fixedly connected to one side of the first connecting rod. A positioning assembly is provided on one side of the connecting seat, and the connecting block and the connecting groove are fixedly connected through the positioning assembly.

3. The photoelectric liquid level sensor for line protection according to claim 2, characterized in that: The positioning assembly includes a positioning groove, which is opened inside the connecting block, a positioning rod is inserted into the positioning groove, the positioning rod is slidably connected to the inside of the connecting seat, one side of the connecting seat is rotatably connected to a screw rod, the outer surface of the screw rod is threadedly connected to a slider, the slider is slidably connected to the inside of the connecting seat, one side of the slider is fixedly connected to one side of the positioning rod, and the top end of the screw rod is fixedly connected to a torsion wheel.

4. The photoelectric liquid level sensor for line protection according to claim 1, characterized in that: The alarm mechanism comprises a mounting block, which is fixedly connected to the top of the docking male plug, a warning light is fixedly connected to one side of the mounting block, a touch switch is installed on the other side of the mounting block, and a touch rod is movably contacted on one side of the touch switch.

5. The photoelectric liquid level sensor for line protection according to claim 4, characterized in that: A transmission block is fixedly connected to one side of the touch rod, a spring is fixedly connected between the transmission block and the mounting block, and the spring is sleeved on the outside of the touch rod, and a pushing component is provided on one side of the transmission block.

6. The photoelectric liquid level sensor for line protection according to claim 5, characterized in that: The pushing assembly comprises a recessed frame, the recessed frame is fixedly connected to the second connecting rod, one side of the recessed frame is fixedly connected to a transmission column, and one side of the transmission column is in active contact with one side of the transmission block.

7. The photoelectric liquid level sensor for line protection according to claim 6, characterized in that: A square groove is provided inside the transmission block, a square block is inserted inside the square groove, and one side of the square block is fixedly connected to one side of the transmission column.

8. The photoelectric liquid level sensor for line protection according to claim 5, characterized in that: Both sides of the transmission block are fixedly connected with guide blocks, a side of the mounting block close to the guide block is fixedly connected with a limit rod, and the guide block is slidably connected to the limit rod.

9. The photoelectric liquid level sensor for line protection according to claim 1, characterized in that: Both sides of the mounting frame are fixedly connected with sliding rods, and two sliding rods are symmetrically provided with screw rods, and one side of the moving block is slidably connected with the sliding rods.

10. The photoelectric liquid level sensor for line protection according to claim 1, characterized in that: A docking groove is provided on one side of the docking female plug, a docking block is inserted into the docking groove, and one side of the docking block is fixedly connected to one side of the docking male plug.

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