Corrosion-resistant Hall sensor

Abstract

The invention relates to the technical field of Hall sensors, and particularly discloses a corrosion-resistant Hall sensor which comprises a fixing frame, the top end of the fixing frame is fixedly connected with a connecting column, the top end of the connecting column is in threaded connection with a threaded column, and the top end of the threaded column is provided with a liquid level sensor body. By the adoption of the structure, the connecting column and the connecting block penetrate through the container, then a user clamps the second clamping block into the circular groove through the first clamping groove, then the first clamping block is rotated through the protruding block, the second clamping block is rotated to the position which does not correspond to the second clamping groove, a second rubber pad has good elasticity, and the second clamping block is clamped into the circular groove through the second clamping block. And through downward pressing of a limiting block, the position of a connecting block can be effectively clamped, then the position fixing stability of the fixing frame can be effectively improved, and when the fixing frame needs to be detached for maintenance, a first clamping block is rotated through a protruding block, and a second clamping block is rotated to the position corresponding to a second clamping groove.

Description

Technical Field

[0001] The invention relates to the technical field of Hall sensors, in particular to a corrosion-resistant Hall sensor. Background Art

[0002] The Hall liquid level sensor is a sensor that uses the Hall effect of semiconductor materials to measure the liquid level. The photoelectric liquid level sensor has many advantages such as simple structure, high positioning accuracy, low power consumption, and small size. The sensor is independent of other characteristics of the medium including temperature, pressure, density, and electrical parameters. Therefore, the liquid level detection is accurate, the repetition accuracy is high, the response speed is fast, and the liquid level control is very precise. It includes integrated water level sensors, separate water level sensors, and multi-point water level sensors. According to the working environment requirements, the surface of the Hall sensor will be coated with an anti-corrosion coating, which can improve its own corrosion resistance, so as to increase its own service life.

[0003] A Chinese patent with announcement number "CN221006498U" discloses a corrosion-resistant Hall liquid level sensor, including a fixing frame, one side of the fixing frame is fixedly connected to a connecting column, one end of the connecting column is threadedly connected to a liquid level sensor body, the outer side of one side of the fixing frame is respectively fixedly connected to a screw, the outer wall of the screw is sleeved with a sealing ring, and the outer wall of one end of the screw is threadedly connected to a nut.

[0004] However, this sensor still has some shortcomings. When installing the fixing bracket, the user will first pass the screw and the connecting column through the container, and then fix its position with the nut. When the user needs to disassemble the fixing bracket for maintenance later, the user needs to unscrew each nut in a threaded manner. At the same time, the threaded fixation of the nut is easy to loosen, and it is also easy to cause wear to the fixing point of the container. While reducing the fixing stability of the fixing bracket point, it is not easy for the user to disassemble the fixing bracket for maintenance later. Summary of the invention

[0005] The object of the present invention is to provide a corrosion-resistant Hall sensor to solve the problem in the above background technology that the fixing frame is unstable and not suitable for later disassembly and maintenance.

[0006] To achieve the above-mentioned purpose, the present invention provides a corrosion-resistant Hall sensor, comprising a fixing frame, a connecting column fixedly connected to the top of the fixing frame, a threaded column threadedly connected to the top of the connecting column, a liquid level sensor body installed on the top of the threaded column, a connecting block fixedly connected to the top of the fixing frame, a first slot is provided on the top of the connecting block, a second slot is provided on the inner wall of the first slot, a circular groove is provided on the inner bottom end of the first slot, a retaining spring is installed on the inner bottom end of the circular groove, a first clamping block is clamped on the inner side of the first slot, a second clamping block matching the second slot is fixedly connected to the outer wall of the first clamping block, the second clamping block is clamped on the inner side of the circular groove, the bottom end of the second clamping block is clamped on the top of the retaining spring, the top of the first clamping block is fixedly connected to a limiting block, the bottom end of the limiting block is fixedly connected to a second rubber pad, the first clamping block is located on the inner side close to the second rubber pad, the top of the first clamping block is fixedly connected to a protrusion, the internal thread of the fixing frame is connected to a mounting shell, an electric push rod is installed on the inner side of the mounting shell, and one side of the electric push rod is fixedly connected to a support The bottom end of the mounting shell is threadedly connected with a connecting plate, and the bottom end of the connecting plate is slidably connected with a mounting plate, and the mounting plate is plugged into the bottom end of the supporting block. The bottom end of the mounting plate is equipped with a detection head. When installing the fixing frame, the container is first passed through the connecting column and the connecting block, and then the user inserts the second card block into the circular groove through the first card slot. Then the user rotates the first card block through the grasping point granted by the protrusion, rotates the second card block to a position that does not correspond to the second card slot, and then limits the position of the second card block through the retaining spring, thereby preventing the first card block from being ejected through the first card slot. The second rubber pad has good elasticity, and then by pressing down the limit block, the position of the connecting block can be effectively clamped, and the second rubber pad can also prevent the limit block from rubbing against the surface of the container, thereby effectively improving the stability of the fixing position of the fixing frame. When the fixing frame needs to be disassembled for maintenance, the first card block is rotated by the protrusion, and the second card block is rotated to a position corresponding to the second card slot and pulled out.

[0007] In a further embodiment, a first rubber pad matching the second rubber pad is fixedly connected to the outer wall of the connecting block, the bottom end of the first rubber pad is in contact with the top of the fixing frame, and the position of the first rubber pad is symmetrical to the position of the second rubber pad; a first sealing ring is fixedly connected to the outer wall of the connecting column, the bottom end of the first sealing ring is in contact with the top of the fixing frame, and a second sealing ring is fixedly connected to the bottom end of the liquid level sensor body, and the position of the second sealing ring is symmetrical to the position of the first sealing ring; by installing the second rubber pad, the first sealing ring and the second sealing ring, it is possible to effectively avoid collision or wear between the installation points of the connecting column and the connecting block and the inner and outer walls of the container, and at the same time, it is possible to effectively improve the sealing of the connection points.

[0008] In a further embodiment, a thread groove matching the threaded column is provided at the top of the connecting column, and the bottom end of the threaded column is threadedly connected to the inner side of the thread groove. The liquid level sensor body is threadedly connected to the top of the connecting column through the threaded column and the thread groove. By screwing the threaded column in, the position of the liquid level sensor body can be effectively fixed to prevent it from being displaced. When the liquid level sensor needs to be disassembled for maintenance at a later stage, the threaded column can be screwed out of the thread groove through the thread principle.

[0009] In a further embodiment, a first screw hole is provided on the outer wall of the fixing frame, and the first screw holes penetrate the outer sides of the fixing frame and the mounting shell. 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 interior of the mounting shell through the first screw hole. The mounting shell is threadedly connected to the interior of the fixing frame through the first screw hole and the first bolt. By screwing in the first bolt, the position of the mounting shell can be effectively fixed, and displacement of the mounting shell can be avoided. When the mounting shell needs to be removed, the first bolt can be screwed out of the first screw hole to remove the mounting shell from the interior of the fixing frame.

[0010] In a further embodiment, a first sliding groove matching the support block is opened on the inner wall of the mounting shell, and the outer side of the support block is slidably connected to the inner wall of the mounting shell through the first sliding groove. By opening the first sliding groove, the position and angle of movement of the support block can be effectively limited, thereby improving the stability of the support block position adjustment.

[0011] In a further embodiment, a telescopic rod is fixedly connected to one side of the support block, the position of the telescopic rod is symmetrical to the position of the telescopic axis of the electric push rod, and one side of the telescopic rod is fixedly connected to the inner wall of the mounting shell. Through the fixation of the telescopic rod, its extension and retraction can provide secondary limit support to one side of the support block, and at the same time can also pull the moving position of the support block, thereby further improving the stability of the support block position adjustment.

[0012] In a further embodiment, a second screw hole is opened at the bottom end of the connecting plate, and the second screw holes penetrate the bottom ends of the connecting plate and the mounting shell. The inner side of the second screw hole is threadedly connected with a second bolt, and the top end of the second bolt is threadedly connected to the interior of the mounting shell through the second screw hole. The connecting plate is threadedly connected to the bottom end of the mounting shell through the second screw hole and the second bolt. By screwing in the second bolt, the position of the connecting plate can be effectively limited and fixed, and displacement of the connecting plate can be avoided. When the connecting plate needs to be removed, the second bolt can be screwed out of the second screw hole.

[0013] In a further embodiment, a slot is provided at the bottom end of the support block, and a plug-in plate matching the slot is fixedly connected to the top end of the mounting plate. The plug-in plate is inserted into the inside of the slot, and the top end of the mounting plate is inserted into the bottom end of the support block through the slot and the plug-in plate. By inserting the plug-in plate, the mounting plate and the support block can be docked with each other. When the support block moves, its mounting plate will be pushed together, which is convenient for the user to adjust the position of the detection head.

[0014] In a further embodiment, a second slide groove matching the mounting plate is provided at the bottom end of the connecting plate, and the top end of the mounting plate is slidably connected to the bottom end of the connecting plate via the second slide groove. By opening the second slide groove, the position and angle of movement of the mounting plate can be effectively limited, thereby effectively improving the stability of the position adjustment of the mounting plate.

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

[0016] Firstly, in the present invention, when installing the fixing frame, the container is first passed through the connecting column and the connecting block, and then the user inserts the second blocking block into the circular groove through the first blocking groove, and then rotates the first blocking block through the protrusion to rotate the second blocking block to a position that does not correspond to the second blocking groove, and then limits its position through the retaining spring, thereby preventing the first blocking block from being ejected. The second rubber pad has good elasticity, and then the position of the connecting block can be effectively clamped by pressing down the limiting block. At the same time, the second rubber pad can also prevent the limiting block from rubbing against the surface of the container, thereby effectively improving the stability of the fixing frame position. When the fixing frame needs to be disassembled for maintenance, the first blocking block is rotated through the protrusion to rotate the second blocking block to a position corresponding to the second blocking groove, and then the first blocking block can be directly pulled out, thereby solving the problem of not being easy to disassemble the fixing frame for maintenance at a later time.

[0017] Secondly, in the present invention, when it is necessary to adjust the position of the detection head, the user can start the electric push rod, and the electric push rod can push the support block to move. Its first slide groove and telescopic rod can effectively limit the sliding position and angle of the support block, and can form traction on the moving position of the support block, thereby effectively improving the stability of the support block position adjustment. When the support block moves, the mounting plate plugged into the top of the support block will also move along with it. When the position of the mounting plate changes, the position of the detection head will also change accordingly. Its second slide groove can effectively limit the moving position and angle of the mounting plate, while achieving the convenience of adjusting the position of the detection head, it can also effectively improve the stability of the detection head position adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a schematic diagram of the connecting column structure in the present invention;

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0021] Figure 4 This is a schematic diagram of the structure of the first card block in the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the liquid level sensor body in the present invention;

[0023] Figure 6 It is a schematic diagram of the bottom structure in the present invention;

[0024] Figure 7 It is a schematic diagram of the connecting plate structure in the present invention;

[0025] Figure 8 It is a schematic diagram of the installation shell structure in the present invention.

[0026] In the figure: 1, fixing frame; 2, first sealing ring; 3, connecting column; 4, threaded groove; 5, liquid level sensor body; 6, threaded column; 7, second sealing ring; 8, first rubber pad; 9, connecting block; 10, first clamping groove; 11, second clamping groove; 12, circular groove; 13, retaining spring; 14, first clamping block; 15, second clamping block; 16, limiting block; 17, second rubber pad; 18, protrusion; 19, first screw hole; 20, first bolt; 21, mounting shell; 22, electric push rod; 23, first slide groove; 24, support block; 25, slot; 26, telescopic rod; 27, second screw hole; 28, connecting plate; 29, second bolt; 30, mounting plate; 31, plug plate; 32, detection head; 33, second slide groove. DETAILED DESCRIPTION

[0027] See also Figures 1 to 8In the embodiment of the present invention, a fixing frame 1 is included, the top of the fixing frame 1 is fixedly connected with a connecting column 3, the top of the connecting column 3 is threadedly connected with a threaded column 6, the top of the threaded column 6 is installed with a liquid level sensor body 5, the top of the fixing frame 1 is fixedly connected with a connecting block 9, the top of the connecting block 9 is provided with a first card slot 10, the inner wall of the first card slot 10 is provided with a second card slot 11, the inner bottom end of the first card slot 10 is provided with a circular groove 12, the inner bottom end of the circular groove 12 is installed with a retaining spring 13, the inner side of the first card slot 10 is clamped with a first card block 14, the outer wall of the first card block 14 is fixedly connected with a second card block 15 matching the second card slot 11, the second card block 15 is clamped to the inner side of the circular groove 12, and the bottom end of the second card block 15 is clamped to the retaining spring 13. 3, the top of the first card block 14 is fixedly connected to the limiting block 16, the bottom of the limiting block 16 is fixedly connected to the second rubber pad 17, the first card block 14 is located on the inner side close to the second rubber pad 17, the top of the first card block 14 is fixedly connected to the protrusion 18, the internal thread of the fixing frame 1 is connected to the mounting shell 21, the inner side of the mounting shell 21 is installed with an electric push rod 22, one side of the electric push rod 22 is fixedly connected to the support block 24, the bottom end of the mounting shell 21 is threadedly connected to the connecting plate 28, the bottom end of the connecting plate 28 is slidably connected to the mounting plate 30, the mounting plate 30 is plugged into the bottom end of the supporting block 24, and the bottom end of the mounting plate 30 is installed with a detection head 32. The Hall effect refers to the electric field generated when the electrons in the conductor are subjected to the Lorentz force in the magnetic field. Field phenomenon, specifically, when current passes through a conductor, if a magnetic field is applied in the vertical direction of the plane of the conductor, a potential difference will be generated on the upper and lower sides of the conductor. This phenomenon is called the Hall effect. In the Hall level sensor, a magnetic field source is usually included to generate a stable magnetic field inside the sensor. When current passes through the conductor in the sensor, it is usually a semiconductor material. The electrons move in a directed manner in the conductor. When the magnetic field acts on the electrons in the current, the electrons are deflected by the Lorentz force. This deflection causes the electrons to accumulate on one side of the conductor, forming a potential difference. This potential difference is the Hall voltage. The Hall sensor will output this voltage value. The magnitude of this voltage value is proportional to the magnetic field strength. Therefore, by measuring By measuring the Hall voltage, the size of the magnetic field can be calculated. In the liquid level control system, the Hall sensor is usually installed on the side wall of the container and in contact with the liquid. When the level of the liquid changes, the distance between the liquid and the Hall sensor will change, thereby changing the influence range and intensity of the magnetic field. In this way, the voltage difference generated on both sides of the Hall sensor will also change. By measuring this voltage difference, the horizontal state of the liquid, that is, the liquid level, can be accurately measured. In signal detection, the sensor circuit will receive and detect this voltage difference signal. In signal processing, the received voltage difference signal will be amplified and filtered to enhance the signal strength and remove noise interference, thereby improving the accuracy and stability of the signal. In data conversion, after processing,The circuit will convert the voltage difference signal into a digital signal for subsequent control and display. In the control feedback, the converted digital signal will be compared with the set liquid level threshold. When the liquid level exceeds or falls below the set threshold, the control system will start or stop the corresponding control device as needed to achieve liquid level regulation and control.

[0028] See also Figures 1 to 5 A first rubber pad 8 matching the second rubber pad 17 is fixedly connected to the outer wall of the connecting block 9, the bottom end of the first rubber pad 8 is in contact with the top of the fixing frame 1, and the position of the first rubber pad 8 is symmetrical to the position of the second rubber pad 17. A first sealing ring 2 is fixedly connected to the outer wall of the connecting column 3, the bottom end of the first sealing ring 2 is in contact with the top of the fixing frame 1, and a second sealing ring 7 is fixedly connected to the bottom end of the liquid level sensor body 5, and the position of the second sealing ring 7 is symmetrical to the position of the first sealing ring 2. Due to the presence of the second rubber pad 17, the first sealing ring 2 and the second sealing ring 7, the installation points of the connecting column 3 and the connecting block 9 can be effectively prevented from colliding or wearing with the inner and outer walls of the container, and the sealing of the connection points can also be effectively improved.

[0029] See also Figure 2 and Figure 5 The top of the connecting column 3 is provided with a thread groove 4 that matches the threaded column 6. The bottom end of the threaded column 6 is threadedly connected to the inner side of the thread groove 4. The liquid level sensor body 5 is threadedly connected to the top of the connecting column 3 through the threaded column 6 and the thread groove 4. Due to the existence of the threaded column 6, the screwing of the threaded column 6 can effectively limit and fix the position of the liquid level sensor body 5, thereby preventing it from being displaced. When the liquid level sensor body 5 needs to be disassembled individually, the threaded column 6 can be unscrewed through the thread principle, which is also convenient for the user to perform maintenance on the liquid level sensor body 5 later.

[0030] See also Figure 1 and Figure 6 and Figure 8 A first screw hole 19 is provided on the outer wall of the fixing frame 1, and the first screw holes 19 all penetrate the outer sides of the fixing frame 1 and the mounting shell 21. A first bolt 20 is threadedly connected to the inner side of the first screw hole 19, and one side of the first bolt 20 is threadedly connected to the inside of the mounting shell 21 through the first screw hole 19. The mounting shell 21 is threadedly connected to the inside of the fixing frame 1 through the first screw hole 19 and the first bolt 20. Due to the existence of the first bolt 20, the screwing in of the first bolt 20 can effectively limit and fix the position of the mounting shell 21, and can prevent the mounting shell 21 from being displaced. When the mounting shell 21 needs to be disassembled, the first bolt 20 can be screwed out of the first screw hole 19, which is also convenient for the user to maintain the structure inside the mounting shell 21 later.

[0031] See also Figure 8A first slide groove 23 matching the support block 24 is provided on the inner wall of the mounting shell 21, and the outer side of the support block 24 is slidably connected to the inner wall of the mounting shell 21 through the first slide groove 23. A telescopic rod 26 is fixedly connected to one side of the support block 24. The position of the telescopic rod 26 is symmetrical with the position of the telescopic axis of the electric push rod 22. One side of the telescopic rod 26 is fixedly connected to the inner wall of the mounting shell 21. The telescopic rod 26 includes a movable rod and a sleeve rod. The movable rod is sleeved on the inner side of the sleeve rod, one side of the sleeve rod is fixedly connected to the inner wall of the mounting shell 21, and the other side of the movable rod is fixedly connected to one side of the support block 24. Due to the opening of the first slide groove 23, the position and angle of movement of the support block 24 can be effectively limited, thereby improving the stability of the position adjustment of the support block 24. Due to the existence of the telescopic rod 26, its telescopic support can provide secondary limit support to one side of the support block 24, and at the same time, it can also pull the moving position of the support block 24, thereby further improving the stability of the position adjustment of the support block 24.

[0032] See also Figure 6 and Figure 7 A second screw hole 27 is provided at the bottom end of the connecting plate 28, and the second screw hole 27 penetrates the bottom end of the connecting plate 28 and the mounting shell 21. A second bolt 29 is threadedly connected to the inner side of the second screw hole 27, and the top end of the second bolt 29 is threadedly connected to the inside of the mounting shell 21 through the second screw hole 27. The connecting plate 28 is threadedly connected to the bottom end of the mounting shell 21 through the second screw hole 27 and the second bolt 29. Due to the existence of the second bolt 29, the screwing in of the second bolt 29 can effectively limit and fix the position of the connecting plate 28, and can prevent the connecting plate 28 from being displaced. When the connecting plate 28 needs to be removed, the second bolt 29 can be screwed out of the second screw hole 27, which is also convenient for the user to maintain the structure on the connecting plate 28 later.

[0033] See also Figures 6 to 8 A slot 25 is provided at the bottom end of the support block 24, and a plug-in plate 31 matching the slot 25 is fixedly connected to the top end of the mounting plate 30. The plug-in plate 31 is plugged into the inside of the slot 25, and the top end of the mounting plate 30 is plugged into the bottom end of the support block 24 through the slot 25 and the plug-in plate 31. Due to the existence of the plug-in plate 31, the insertion of the plug-in plate 31 can effectively connect the mounting plate 30 and the support block 24. When the position of the detection head 32 needs to be adjusted, the electric push rod 22 is started to push the support block 24, and the support block 24 can drive the mounting plate 30 to move, and the mounting plate 30 can drive the detection head 32 to move, thereby achieving the purpose of conveniently adjusting the position of the detection head 32.

[0034] See also Figure 6A second slide groove 33 matching the mounting plate 30 is provided at the bottom end of the connecting plate 28, and the top end of the mounting plate 30 is slidably connected to the bottom end of the connecting plate 28 through the second slide groove 33. Due to the opening of the second slide groove 33, the second slide groove 33 can effectively limit the sliding position and angle of the mounting plate 30, thereby effectively improving the stability of the position adjustment of the detection head 32.

[0035] The working principle of the present invention is as follows: when in use, the container is first passed through the connecting column 3 and the connecting block 9, and then the user inserts the second card block 15 into the circular groove 12 through the first card slot 10, and then rotates the first card block 14 through the protrusion 18 to rotate the second card block 15 to a position that does not correspond to the second card slot 11, and then limits its position through the clamping spring 13, thereby preventing the first card block 14 from being ejected. The second rubber pad 17 has good elasticity, and then through the downward pressure of the limiting block 16, the position of the connecting block 9 can be effectively clamped. At the same time, the second rubber pad 17 can also prevent the limiting block 16 from rubbing against the surface of the container, thereby effectively improving the stability of the fixed position of the fixing frame 1. When the fixing frame 1 needs to be disassembled and repaired, When performing maintenance, the first clamping block 14 is rotated through the protrusion 18, and the second clamping block 15 is rotated to the position corresponding to the second clamping groove 11, and then the first clamping block 14 can be directly pulled out, thereby solving the problem of not being easy to disassemble the fixing frame 1 for maintenance at a later time. Due to the presence of the second rubber pad 17, the first sealing ring 2 and the second sealing ring 7, it is possible to effectively avoid the installation points of the connecting column 3 and the connecting block 9 from colliding or wearing with the inner and outer walls of the container, and at the same time, it is also possible to effectively improve the sealing of the connection points. Due to the presence of the threaded column 6, the screwing in of the threaded column 6 can effectively limit and fix the position of the liquid level sensor body 5, thereby preventing it from being displaced. When the liquid level sensor body 5 needs to be disassembled individually, the threaded column 6 can be unscrewed through the thread principle. It can also be helpful for the user to perform maintenance on the liquid level sensor body 5 at a later time. The existence of the first bolt 20 can effectively limit and fix the position of the mounting shell 21 by screwing in the first bolt 20, so as to prevent the mounting shell 21 from being displaced. When the mounting shell 21 needs to be disassembled, the first bolt 20 can be screwed out of the first screw hole 19. It can also be helpful for the user to perform maintenance on the structure inside the mounting shell 21 at a later time. Due to the opening of the first slide groove 23, the position and angle of the movement of the support block 24 can be effectively limited, thereby improving the stability of the position adjustment of the support block 24. Due to the existence of the telescopic rod 26, its telescopic extension can provide secondary limit support to one side of the support block 24, and can also pull the moving position of the support block 24, thereby The stability of the position adjustment of the support block 24 can be further improved. Due to the existence of the second bolt 29, the screwing of the second bolt 29 can effectively limit and fix the position of the connecting plate 28, and can prevent the connecting plate 28 from being displaced. When the connecting plate 28 needs to be removed, the second bolt 29 can be screwed out of the second screw hole 27. At the same time, it is also convenient for the user to maintain the structure on the connecting plate 28 in the later stage. Due to the existence of the plug plate 31, the insertion of the plug plate 31 can effectively connect the mounting plate 30 and the support block 24. When the position of the detection head 32 needs to be adjusted, the electric push rod 22 is started to push the support block 24, and the support block 24 can drive the mounting plate 30 to move, and the mounting plate 30 can drive the detection head 32 to move, thereby achieving the purpose of conveniently adjusting the position of the detection head 32.

Claims

1. A corrosion-resistant Hall sensor, characterized in that: The invention comprises a fixing frame, the top of the fixing frame is fixedly connected with a connecting column, the top of the connecting column is threadedly connected with a threaded column, the top of the threaded column is installed with a liquid level sensor body, the top of the fixing frame is fixedly connected with a connecting block, the top of the connecting block is provided with a first slot, the inner wall of the first slot is provided with a second slot, the inner bottom end of the first slot is provided with a circular slot, the inner bottom end of the circular slot is provided with a retaining spring, the inner side of the first slot is clamped with a first clamping block, the outer wall of the first clamping block is fixedly connected with a second clamping block matching the second slot, the second clamping block is clamped with the inner side of the circular slot, The bottom end of the second clamping block is clamped to the top end of the clamping spring, the top end of the first clamping block is fixedly connected to the limiting block, the bottom end of the limiting block is fixedly connected to the second rubber pad, the first clamping block is located on the inner side close to the second rubber pad, the top end of the first clamping block is fixedly connected to a protrusion, the internal thread of the fixing frame is connected to a mounting shell, an electric push rod is installed on the inner side of the mounting shell, one side of the electric push rod is fixedly connected to a support block, the bottom end of the mounting shell is threadedly connected to a connecting plate, the bottom end of the connecting plate is slidably connected to a mounting plate, the mounting plate is plugged into the bottom end of the support block, and a detection head is installed at the bottom end of the mounting plate.

2. A corrosion-resistant Hall sensor according to claim 1, characterized in that: A first rubber pad matching the second rubber pad is fixedly connected to the outer wall of the connecting block, the bottom end of the first rubber pad is in contact with the top of the fixing frame, and the position of the first rubber pad is symmetrical to that of the second rubber pad; a first sealing ring is fixedly connected to the outer wall of the connecting column, the bottom end of the first sealing ring is in contact with the top of the fixing frame, and a second sealing ring is fixedly connected to the bottom end of the liquid level sensor body, and the position of the second sealing ring is symmetrical to that of the first sealing ring.

3. The corrosion-resistant Hall sensor according to claim 1, characterized in that: The top of the connecting column is provided with a thread groove matching the thread column, the bottom of the thread column is threadedly connected to the inner side of the thread groove, and the liquid level sensor body is threadedly connected to the top of the connecting column through the thread column and the thread groove.

4. The corrosion-resistant Hall sensor according to claim 1, characterized in that: A first screw hole is provided on the outer wall of the fixing frame, and the first screw holes penetrate the outer sides of the fixing frame and the mounting shell. 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 mounting shell through the first screw hole. The mounting shell is threadedly connected to the inside of the fixing frame through the first screw hole and the first bolt.

5. The corrosion-resistant Hall sensor according to claim 1, characterized in that: A first sliding groove matching the support block is provided on the inner wall of the installation shell, and the outer side of the support block is slidably connected to the inner wall of the installation shell through the first sliding groove.

6. The corrosion-resistant Hall sensor according to claim 1, characterized in that: A telescopic rod is fixedly connected to one side of the support block, the position of the telescopic rod is symmetrical to the position of the telescopic axis of the electric push rod, and one side of the telescopic rod is fixedly connected to the inner wall of the mounting shell.

7. The corrosion-resistant Hall sensor according to claim 1, characterized in that: A second screw hole is provided at the bottom end of the connecting plate, and the second screw hole passes through the bottom ends of the connecting plate and the mounting shell. A second bolt is threadedly connected to the inner side of the second screw hole, and the top end of the second bolt is threadedly connected to the inside of the mounting shell through the second screw hole. The connecting plate is threadedly connected to the bottom end of the mounting shell through the second screw hole and the second bolt.

8. The corrosion-resistant Hall sensor according to claim 1, characterized in that: A slot is provided at the bottom of the support block, a plug plate matching the slot is fixedly connected to the top of the mounting plate, the plug plate is plugged into the slot, and the top of the mounting plate is plugged into the bottom of the support block through the slot and the plug plate.

9. The corrosion-resistant Hall sensor according to claim 1, characterized in that: The bottom end of the connecting plate is provided with a second sliding groove matching the mounting plate, and the top end of the mounting plate is slidably connected to the bottom end of the connecting plate through the second sliding groove.

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