Adjustable photoelectric liquid level sensor

Abstract

The utility model discloses an adjustable photoelectric liquid level sensor, which relates to the technical field of sensors and comprises a sensor body, a glass crystal head is mounted at the bottom end of the sensor body, and a first mounting block is in threaded connection with the top end of the sensor body. By adopting the structure, when the detection height of the sensor body needs to be adjusted, a user can screw the second bolt, the rotating shaft can enable the bottom end of the second bolt to rotate in situ, the first mounting block can be stretched or contracted accordingly, and the telescopic rod can effectively reinforce the connection point of the first mounting block and the second mounting block, so that the detection height of the sensor body can be adjusted. The height of the sensor body can be conveniently adjusted, when the glass crystal head is clamped on the inner side of the limiting hole, the rubber pad can prevent the glass crystal head from being collided, the limiting hole and the telescopic plate can effectively limit and reinforce the detection angle of the glass crystal head, and therefore the accuracy of data detection of the sensor body can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and particularly relates to an adjustable photoelectric liquid level sensor. Background Art

[0002] The photoelectric liquid level sensor is a sensor that uses optical principles to measure the height of liquid. It is usually composed of a transmitter and a receiver. Its working principle is based on the principle of reflection and refraction of light at the interface of two different media. When the transmitter emits a beam of light to the liquid surface, the light will be reflected back at the liquid surface, and the receiver will receive the reflected light. By detecting the reflection time of the light or the intensity of the reflected light, the photoelectric liquid level sensor can determine the height of the liquid level.

[0003] A Chinese patent with announcement number "CN212871391U" discloses a photoelectric liquid level sensor, including a sensor housing, the sensor housing is inserted into the interior of a mounting wall, and one end of the sensor housing is located on the inner side of the mounting wall and is connected to an end ring, one end of the end ring is connected to a lens, a near-infrared light-emitting diode is installed on the inner side of the sensor housing close to the lens, and a photosensitive receiver is installed on the inner side of the sensor housing close to the near-infrared light-emitting diode.

[0004] However, this sensor still has some shortcomings. When using the sensor, the user will place the sensor at the specific position that needs to be detected, and then detect the distance through the sensor. Because the detection height needs to be adjusted when using the sensor for detection, and the sensor itself cannot adjust the height, the user needs to remove the sensor and install it a second time with a limit position. This is very inconvenient. While adjusting the height back and forth, it will also affect the accuracy of the sensor detection. If the angle deviates, the detected data will also change. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide an adjustable photoelectric liquid level sensor to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] An adjustable photoelectric liquid level sensor comprises a sensor body, a glass crystal head is installed at the bottom end of the sensor body, a first mounting block is threadedly connected to the top end of the sensor body, a telescopic plate is threadedly connected to the bottom end of the first mounting block, a limiting hole matching the crystal glass head is provided at the bottom end of the telescopic plate, a rubber pad is fixedly connected to the inner wall of the limiting hole, the position of the rubber pad is symmetrical with the position of the crystal glass head, a telescopic rod is fixedly connected to the top end of the first mounting block, a second mounting block is fixedly connected to the top end of the telescopic rod, a rear shell is installed at the top end of the second mounting block, a shell cover is threadedly connected to the top end of the rear shell, a power supply module is installed at the bottom end of the shell cover, the power supply module is located on the inner side of the rear shell, a power-on wire is installed at the top end of the shell cover, the limiting plates are threadedly connected to the outer walls of the first mounting block and the second mounting block, a second screw hole is provided at the top end of the limiting plate on the outer wall of the second mounting block, and the The top of the upper limit plate on the outer wall of a mounting block is rotatably connected to a rotating shaft, and the top of the rotating shaft is fixedly connected to a second bolt, and the second bolt is threadedly connected to the inner side of the second screw hole. The sensor body is placed at a specific position that needs to be detected, and the detection light of the sensor body can be emitted through the glass crystal head. When the detection height of the sensor body needs to be adjusted, the user can turn the second bolt. When the second bolt rotates, its rotating shaft can make the bottom end of the second bolt rotate in situ, and the first mounting block will be stretched or contracted accordingly, thereby achieving the purpose of facilitating the adjustment of the detection height of the sensor body. Due to the existence of the telescopic plate, the glass crystal head is stuck on the inner side of the limiting hole, and its rubber pad can prevent the glass crystal head from being bumped, and the limiting hole and the telescopic plate can effectively limit and reinforce the angle detected by the glass crystal head, thereby preventing the glass crystal head from angular deviation.

[0008] As a preferred technical solution, an iron ring is fixedly connected to the bottom end of the sensor body, and a magnet matching the iron ring is fixedly connected to the top end of the telescopic plate. The position of the iron ring is symmetrical to that of the magnet. The crystal glass head is located on the inner side of the iron ring. The iron ring can be adsorbed by the magnet, thereby effectively limiting the position of the telescopic plate, thereby avoiding displacement of the glass crystal head when the limiting plate limits the position.

[0009] As a preferred technical solution, a first thread groove is provided at the bottom end of the first mounting block, and a first external thread matching the first thread groove is provided on the outer wall of the sensor body. The sensor body is threadably connected to the bottom end of the first mounting block via the first external thread and the first thread groove. The sensor body is screwed into the first thread groove via the first external thread, thereby effectively thread-fixing the position of the sensor body. While improving the position stability of the sensor body, it is also more conducive to the later disassembly of the sensor body, and it is also convenient for the later maintenance of the sensor body.

[0010] As a preferred technical solution, a first screw hole is provided on the outer side of the first mounting block, and the first screw holes penetrate the outer walls of the first mounting block and the telescopic plate. The inner sides of the first screw holes are threadedly connected with a first bolt, and one side of the first bolt is threadedly connected to the inside of the telescopic plate through the first screw hole, and the telescopic plate is threadedly connected to the bottom end of the first mounting block through the first bolt and the first screw hole, and the position of the telescopic plate can be effectively limited by screwing the first bolt into the first screw hole, thereby preventing the limiting plate from falling off, and when disassembling the limiting plate, the first bolt can be screwed out of the first screw hole, thereby also achieving the purpose of facilitating the disassembly of the telescopic plate.

[0011] As an optimal technical solution, a third screw hole is provided on the outer wall of the limit plate, and the third screw hole passes through the outer walls of the limit plate and the first mounting block and the second mounting block, and the inner side of the third screw hole is threadedly connected with a third bolt, and one side of the third bolt is threadedly connected to the inside of the first mounting block and the second mounting block through the third screw hole, and the limit plate is threadedly connected to the outer walls of the first mounting block and the second mounting block through the third screw hole and the third bolt, and the position of the limit plate can be effectively limited and fixed by screwing the third bolt into the third screw hole, so as to prevent the limit plate from falling off. When the limit plate needs to be removed, the user can screw the third bolt out of the third screw hole. After the limit plate is removed, the first mounting block and the second mounting block will also be separated, which is also convenient for the user to maintain the two.

[0012] As a preferred technical solution, the bottom end of the shell cover is fixedly connected to a connecting frame, the outer wall of the connecting frame is provided with a second external thread, the top of the rear shell is provided with a second thread groove matching the second external thread, the shell cover is threadedly connected to the top of the rear shell through the connecting frame and the second thread groove, the bottom end of the shell cover is fixedly connected to a sealing ring, the connecting frame is located on the inner side of the sealing ring, the top of the rear shell is provided with a circular groove matching the sealing ring, the sealing ring covers the inner side of the circular groove, and the position of the shell cover can be effectively fixed by screwing the connecting frame into the second thread groove, and the sealing ring can seal the connection point between the shell cover and the rear shell, thereby effectively improving the sealing of the rear shell itself and preventing water from flowing into its interior through the connection point between the two. When removing the shell cover, just screw the connecting frame out of the second thread groove.

[0013] As a preferred technical solution, a protrusion is fixedly connected to the top of the shell cover, and the protrusion is fixedly connected to the left and right corners of the top of the shell cover. The shape of the protrusion is concave, and the shape of the corner of the protrusion is arc-shaped. The protrusion can provide the user with a gripping point. When removing the shell cover, the user can twist the shell cover through the gripping point provided by the protrusion.

[0014] As a preferred technical solution, the power-on wire is connected to the power supply module circuit, the power supply module is connected to the sensor body circuit, the sensor body detection head is located on the inner side of the glass crystal head, the power supply module can be energized through the power-on wire, and the power supply module can transmit electricity to the sensor body and the electrical equipment inside the sensor body, thereby enabling the sensor body to operate normally.

[0015] In summary, the utility model mainly has the following beneficial effects:

[0016] First, adjust the position of the sensor body so that the detection light of the sensor body can be emitted through the glass crystal head. When the detection height of the sensor body needs to be adjusted, the user can screw the second bolt, and the shaft can rotate the bottom end of the second bolt in place, and the first mounting block will be stretched or contracted accordingly. The telescopic rod can effectively reinforce the connection point between the first mounting block and the second mounting block, thereby achieving the purpose of conveniently adjusting the detection height of the sensor body. When the glass crystal head is stuck on the inner side of the limiting hole, the rubber pad can prevent the glass crystal head from being bumped, and the limiting hole and the telescopic plate can effectively limit and reinforce the angle of the glass crystal head detection, thereby effectively improving the accuracy of the data detection of the sensor body;

[0017] Second, because the shell cover is threadedly fixed to the top of the back shell, when the shell cover needs to be removed, the user twists the shell cover through the gripping point provided by the protrusion, and removes the shell cover by unscrewing the connecting frame out of the second external thread. The shell cover can bring out the power supply module together, thereby achieving the purpose of convenient disassembly and assembly of the shell cover, and also facilitating the later user to perform maintenance on the inside of the back shell. When the shell cover is tightened, its sealing ring will also be tightly fixed on the inside of the circular groove. The sealing ring can effectively seal the connection point between the shell cover and the back shell, thereby preventing water from flowing into the interior of the back shell through the connection point between the two. While improving the overall sealing of the back shell, it also effectively improves the overall protection of the back shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0020] Figure 3 This is a schematic diagram of the first mounting block structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the telescopic plate structure of the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 6 This is a schematic diagram of the shell cover structure of the utility model;

[0024] Figure 7 This is a schematic diagram of the top structure of the rear shell of the utility model;

[0025] Figure 8 It is a side structural schematic diagram of the utility model.

[0026] Figure numerals: 1, sensor body, 2, glass crystal head, 3, first external thread, 4, first mounting block, 5, first thread groove, 6, iron ring, 7, telescopic plate, 8, limiting hole, 9, rubber pad, 10, magnet, 11, first screw hole, 12, first bolt, 13, telescopic rod, 14, second mounting block, 15, back shell, 16, limiting plate, 17, second screw hole, 18, rotating shaft, 19, second bolt, 20, third screw hole, 21, third bolt, 22, shell cover, 23, power supply module, 24, power-on wire, 25, bump, 26, sealing ring, 27, connecting frame, 28, second external thread, 29, circular groove, 30, second thread groove. DETAILED DESCRIPTION

[0027] refer to Figures 1 to 8The adjustable photoelectric liquid level sensor described in this embodiment includes a sensor body 1, a glass crystal head 2 is installed at the bottom end of the sensor body 1, a first mounting block 4 is threadedly connected to the top of the sensor body 1, a telescopic plate 7 is threadedly connected to the bottom end of the first mounting block 4, a limiting hole 8 matching the crystal glass head is opened at the bottom end of the telescopic plate 7, a rubber pad 9 is fixedly connected to the inner wall of the limiting hole 8, and the position of the rubber pad 9 is symmetrical to the position of the crystal glass head, a telescopic rod 13 is fixedly connected to the top of the first mounting block 4, a second mounting block 14 is fixedly connected to the top of the telescopic rod 13, a rear shell 15 is installed at the top of the second mounting block 14, a shell cover 22 is threadedly connected to the top of the rear shell 15, a power supply module 23 is installed at the bottom end of the shell cover 22, and the power supply module The block 23 is located on the inner side of the rear shell 15, and a conducting wire 24 is installed on the top of the shell cover 22. The outer walls of the first mounting block 4 and the second mounting block 14 are both threadedly connected with a limiting plate 16. The top of the limiting plate 16 on the outer wall of the second mounting block 14 is provided with a second screw hole 17. The top of the limiting plate 16 on the outer wall of the first mounting block 4 is rotatably connected with a rotating shaft 18, and the top of the rotating shaft 18 is fixedly connected with a second bolt 19, and the second bolt 19 is threadedly connected to the inner side of the second screw hole 17. The sensor body 1 is mainly composed of a pair of transmitting and receiving tubes, a light-transmitting cone, and wires. Among them, the transmitting tube emits light, and the receiver receives light. The light states received by the receiver in the water state and the water-free state are different. The sensor body 1 outputs different electric Flat signal, since the output of the sensor body 1 is only related to whether the photoelectric probe is in contact with the liquid surface, and has nothing to do with other characteristics of the medium, such as temperature, pressure, density, electricity and other parameters, its detection is accurate, the repetition accuracy is high, the response speed is fast, and the liquid level control is very precise. At the same time, the probe volume of the sensor body 1 is relatively small and can be installed separately in a small space, which is suitable for use in special tanks or containers. In addition, by installing multiple photoelectric probes on a measuring body, a multi-point liquid level sensor and a variable controller can also be made. When in use, the position of the sensor body 1 is adjusted, and the detection light of the sensor body 1 can be emitted through the glass crystal head 2. When the detection height of the sensor body 1 needs to be adjusted, the user can turn the second bolt 19, the shaft 18 can make the bottom end of the second bolt 19 rotate in place, and the first mounting block 4 will be stretched or contracted accordingly. The telescopic rod 13 includes a movable rod and a sleeve rod. The movable rod is sleeved on the inner side of the sleeve rod. The bottom end of the sleeve rod is fixedly connected to the top of the first connecting block, and the top of the movable rod is fixedly connected to the bottom end of the second mounting block 14. The telescopic rod 13 can effectively reinforce the connection point between the first mounting block 4 and the second mounting block 14 without hindering the adjustment of the detection height of the sensor body 1, thereby achieving the purpose of facilitating the adjustment of the detection height of the sensor body 1. When the glass crystal head 2 is stuck on the inner side of the limiting hole 8, the rubber pad 9 can prevent the glass crystal head 2 from being bumped, and the limiting hole 8 and the telescopic plate 7 can effectively limit and reinforce the angle detected by the glass crystal head 2.Therefore, the accuracy of data detection of the sensor body 1 can be effectively improved.

[0028] refer to Figure 1 and Figure 4 The bottom end of the sensor body 1 is fixedly connected with an iron ring 6, and the top of the telescopic plate 7 is fixedly connected with a magnet 10 matching the iron ring 6. The position of the iron ring 6 is symmetrical with the position of the magnet 10. The crystal glass head is located on the inner side of the iron ring 6, and the telescopic plate 7 includes a movable plate and a sleeve plate. The movable plate is sleeved on the inner side of the sleeve plate, and the top of the sleeve plate is fixedly connected to the bottom end of the first connecting block. The telescopic plate 7 has the function of conveniently adjusting its own length, so it is convenient to adjust the glass crystal head 2 to the inner side of the limiting hole 8. Due to the presence of the magnet 10 and the iron ring 6, the magnet 10 can adsorb the iron ring 6, so that the position of the telescopic plate 7 can be effectively limited and fixed, thereby avoiding the displacement of the limiting plate 16, and at the same time effectively improving the stability of the position of the limiting plate 16 and the glass crystal head 2.

[0029] refer to Figure 1 and Figure 3 A first thread groove 5 is provided at the bottom end of the first mounting block 4, and a first external thread 3 matching the first thread groove 5 is provided on the outer wall of the sensor body 1. The sensor body 1 is threadedly connected to the bottom end of the first mounting block 4 through the first external thread 3 and the first thread groove 5. Because the sensor body 1 is threadedly fixed to the bottom end of the first mounting block 4, when the sensor body 1 needs to be removed, the sensor body 1 is twisted and the first external thread 3 is screwed out of the first thread groove 5 to remove the sensor body 1. Therefore, the purpose of facilitating the disassembly and assembly of the sensor body 1 can be achieved, and it is also convenient for the user to perform maintenance on the sensor body 1 later.

[0030] refer to Figure 1 and Figure 2 A first screw hole 11 is provided on the outer side of the first mounting block 4, and the first screw holes 11 all penetrate the outer walls of the first mounting block 4 and the telescopic plate 7. A first bolt 12 is threadedly connected to the inner side of the first screw hole 11. One side of the first bolt 12 is threadedly connected to the inside of the telescopic plate 7 through the first screw hole 11. The telescopic plate 7 is threadedly connected to the bottom end of the first mounting block 4 through the first bolt 12 and the first screw hole 11. Because the telescopic plate 7 is also threadedly fixed to the bottom end of the first mounting block 4, when the telescopic plate 7 needs to be removed, the user can screw the first bolt 12 out of the first screw hole 11, thereby achieving the purpose of convenient disassembly and assembly of the telescopic plate 7. Disassembling the telescopic plate 7 individually is also convenient for the user to maintain the telescopic plate 7 later, and it is also convenient for the user to check the outside of the sensor body 1.

[0031] refer to Figure 1 and Figure 2A third screw hole 20 is provided on the outer wall of the limiting plate 16, and the third screw hole 20 penetrates the outer walls of the limiting plate 16 and the first mounting block 4 and the second mounting block 14. The inner side of the third screw hole 20 is threadedly connected with a third bolt 21, and one side of the third bolt 21 is threadedly connected to the inside of the first mounting block 4 and the second mounting block 14 through the third screw hole 20. The limiting plate 16 is threadedly connected to the outer walls of the first mounting block 4 and the second mounting block 14 through the third screw hole 20 and the third bolt 21. Because the limiting plate 16 is fixed to the first mounting block 4 and the second mounting block 14 through the thread principle, when the limiting plate 16 needs to be removed, the user can screw the third bolt 21 out of the third screw hole 20. When the limiting plate 16 is removed, the first mounting block 4 and the second mounting block 14 will be separated, which is also convenient for the user to inspect and maintain the inner side of the sensor body 1 and the rear shell 15.

[0032] refer to Figures 5 to 8 The bottom end of the shell cover 22 is fixedly connected with a connecting frame 27, and a second external thread 28 is provided on the outer wall of the connecting frame 27. A second thread groove 30 matching the second external thread 28 is provided at the top of the rear shell 15. The shell cover 22 is threadedly connected to the top of the rear shell 15 through the connecting frame 27 and the second thread groove 30. The bottom end of the shell cover 22 is fixedly connected with a sealing ring 26, and the connecting frame 27 is located on the inner side of the sealing ring 26. A circular groove 29 matching the sealing ring 26 is provided at the top of the rear shell 15, and the sealing ring 26 covers the inner side of the circular groove 29. The top end of the shell cover 22 is fixedly connected with a protrusion 25, and the protrusion 25 is fixedly connected to the left and right corners of the top end of the shell cover 22. The shape of the protrusion 25 is concave, and the shape of the corner of the protrusion 25 is arc-shaped. Because the shell cover 22 is threadedly fixed to the top of the rear shell 15, when the shell cover 2 needs to be removed, When removing the cover 22, the user twists the cover 22 through the gripping point provided by the protrusion 25. The corner of the protrusion 25 is in an arc shape, which can prevent the corner of the protrusion 25 from hitting the user's palm. The cover 22 can be removed by twisting the connection frame 27 out of the second external thread 28. The cover 22 can take out the power supply module 23 together, so that the purpose of facilitating the disassembly and assembly of the cover 22 can be achieved, and it is also convenient for the user to perform maintenance on the inner side of the rear shell 15 in the later stage. When the cover 22 is tightened, the sealing ring 26 will also be tightly fixed on the inner side of the circular groove 29. The sealing ring 26 can effectively seal the connection point between the cover 22 and the rear shell 15, so as to prevent water from flowing into the interior of the rear shell 15 through the connection point between the two. While improving the overall sealing of the rear shell 15, the overall protection of the rear shell 15 is also effectively improved.

[0033] refer to Figures 1 to 6The power-on wire 24 is connected to the power supply module 23 circuit, the power supply module 23 is connected to the sensor body 1 circuit, the detection head of the sensor body 1 is located on the inner side of the glass crystal head 2, the power-on wire 24 can energize the power supply module 23, and the power supply module 23 can transmit electricity to the sensor body 1 and the electrical equipment inside the sensor body 1, so that the sensor body 1 can operate normally.

[0034] Principle and advantages of use: When in use, adjust the position of the sensor body 1, and the detection light of the sensor body 1 can be emitted through the glass crystal head 2. When the detection height of the sensor body 1 needs to be adjusted, the user can screw the second bolt 19, and the shaft 18 can make the bottom end of the second bolt 19 rotate in place, and the first mounting block 4 will be stretched or contracted accordingly. The telescopic rod 13 can effectively reinforce the connection point between the first mounting block 4 and the second mounting block 14 without hindering the adjustment of the detection height of the sensor body 1, thereby achieving the purpose of facilitating the adjustment of the detection height of the sensor body 1. When the glass crystal head 2 is stuck on the inner side of the limiting hole 8, the rubber pad 9 can prevent the glass crystal head 2 from being bumped, and the limiting hole 8 and the telescopic plate 7 can The angle detected by the crystal head 2 is effectively limited and reinforced, thereby effectively improving the accuracy of data detection of the sensor body 1. Due to the presence of the magnet 10 and the iron ring 6, the magnet 10 can adsorb the iron ring 6, so that the position of the telescopic plate 7 can be effectively limited and fixed, thereby avoiding the displacement of the limit plate 16, and at the same time effectively improving the stability of the position of the limit plate 16 and the glass crystal head 2. Because the sensor body 1 is threadedly fixed to the bottom end of the first mounting block 4, when the sensor body 1 needs to be removed, the sensor body 1 is twisted and the first external thread 3 is screwed out of the first thread groove 5 to remove the sensor body 1. Therefore, the purpose of convenient disassembly and assembly of the sensor body 1 can be achieved, and it is also convenient for users to maintain the sensor body 1 later. The telescopic plate 7 is also threadedly fixed to the bottom end of the first mounting block 4. When the telescopic plate 7 needs to be removed, the user can screw the first bolt 12 out of the first screw hole 11, thereby achieving the purpose of convenient disassembly and assembly of the telescopic plate 7. Removing the telescopic plate 7 individually is also convenient for the user to maintain the telescopic plate 7 later, and it is also convenient for the user to check the outside of the sensor body 1. Because the limiting plate 16 is fixed to the first mounting block 4 and the second mounting block 14 by the principle of threads, when the limiting plate 16 needs to be removed, the user can screw the third bolt 21 out of the third screw hole 20. When the limiting plate 16 is removed, the first mounting block 4 and the second mounting block 14 will be separated therefrom, thereby also facilitating the user to check the sensor body 1 and The inner side of the rear shell 15 can be inspected and maintained. Since the shell cover 22 is threadedly fixed to the top of the rear shell 15, when the shell cover 22 needs to be removed, the user twists the shell cover 22 through the gripping point provided by the protrusion 25. The shape of the corner of the protrusion 25 is arc-shaped, which can prevent the corner of the protrusion 25 from hurting the user's palm. The shell cover 22 can be removed by screwing out the second external thread 28 of the connecting frame 27. The shell cover 22 can bring out the power supply module 23 together, thereby achieving the purpose of facilitating the disassembly and assembly of the shell cover 22, and also facilitating the later user to perform maintenance on the inner side of the rear shell 15. When the shell cover 22 is tightened, the sealing ring 26 will also be tightly fixed on the inner side of the circular groove 29. The sealing ring 26 can effectively seal the connection point between the shell cover 22 and the rear shell 15.Therefore, water can be prevented from flowing into the rear shell 15 through the connection point between the two, and the overall sealing of the rear shell 15 is improved while the overall protection of the rear shell 15 is effectively improved.

Claims

1. An adjustable photoelectric liquid level sensor, comprising a sensor body, characterized in that: A glass crystal head is installed at the bottom end of the sensor body, and a first mounting block is threadedly connected to the top of the sensor body, and a telescopic plate is threadedly connected to the bottom end of the first mounting block, and a limiting hole matching the crystal glass head is opened at the bottom end of the telescopic plate, and a rubber pad is fixedly connected to the inner wall of the limiting hole, and the position of the rubber pad is symmetrical with the position of the crystal glass head, a telescopic rod is fixedly connected to the top end of the first mounting block, and a second mounting block is fixedly connected to the top end of the telescopic rod, and a rear shell is installed at the top end of the second mounting block, and a shell cover is threadedly connected to the top end of the rear shell, and a power supply module is installed at the bottom end of the shell cover, and the power supply module is located on the inner side of the rear shell, and a power supply line is installed at the top end of the shell cover, and the outer walls of the first mounting block and the second mounting block are both threadedly connected to the limiting plate, and the top end of the upper limit plate on the outer wall of the second mounting block is opened with a second screw hole, and the top end of the upper limit plate on the outer wall of the first mounting block is rotatably connected with a rotating shaft, and the top end of the rotating shaft is fixedly connected with a second bolt, and the second bolt is threadedly connected to the inner side of the second screw hole.

2. The adjustable photoelectric liquid level sensor according to claim 1, characterized in that: The bottom end of the sensor body is fixedly connected with an iron ring, the top end of the telescopic plate is fixedly connected with a magnet matching the iron ring, the position of the iron ring is symmetrical to that of the magnet, and the crystal glass head is located on the inner side of the iron ring.

3. The adjustable photoelectric liquid level sensor according to claim 1, characterized in that: The bottom end of the first mounting block is provided with a first thread groove, the outer wall of the sensor body is provided with a first external thread matching the first thread groove, and the sensor body is threadedly connected to the bottom end of the first mounting block through the first external thread and the first thread groove.

4. The adjustable photoelectric liquid level sensor according to claim 1, characterized in that: A first screw hole is provided on the outer side of the first mounting block, and the first screw holes penetrate the outer wall of the first mounting block and the telescopic plate. A first bolt is threadedly connected to the inner side of the first screw hole, and one side of the first bolt is threadedly connected to the inside of the telescopic plate through the first screw hole. The telescopic plate is threadedly connected to the bottom end of the first mounting block through the first bolt and the first screw hole.

5. The adjustable photoelectric liquid level sensor according to claim 1, characterized in that: A third screw hole is provided on the outer wall of the limiting plate, and the third screw holes penetrate the outer walls of the limiting plate and the first mounting block and the second mounting block. A third bolt is threadedly connected to the inner side of the third screw hole, and one side of the third bolt is threadedly connected to the inside of the first mounting block and the second mounting block through the third screw hole. The limiting plate is threadedly connected to the outer walls of the first mounting block and the second mounting block through the third screw hole and the third bolt.

6. The adjustable photoelectric liquid level sensor according to claim 1, characterized in that: The bottom end of the shell cover is fixedly connected to a connecting frame, an outer wall of the connecting frame is provided with a second external thread, the top end of the rear shell is provided with a second thread groove matching the second external thread, and the shell cover is threadedly connected to the top end of the rear shell through the connecting frame and the second thread groove.

7. The adjustable photoelectric liquid level sensor according to claim 6, characterized in that: A sealing ring is fixedly connected to the bottom end of the shell cover, the connecting frame is located on the inner side of the sealing ring, a circular groove matching the sealing ring is opened on the top end of the rear shell, and the sealing ring covers the inner side of the circular groove.

8. The adjustable photoelectric liquid level sensor according to claim 1, characterized in that: The top of the shell cover is fixedly connected with a convex block, and the convex block is fixedly connected to the left and right corners of the top of the shell cover near the corners. The shape of the convex block is concave, and the shape of the corner of the convex block is arc-shaped.

9. The adjustable photoelectric liquid level sensor according to claim 1, characterized in that: The power supply line is connected to the power supply module circuit, the power supply module is connected to the sensor body circuit, and the position of the sensor body detection head is located inside the glass crystal head.

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