CN210119268U - Liquid level sensor with high stability - Google Patents

Abstract

The utility model discloses a liquid level sensor with strong stability, which specifically relates to the technical field of sensors. A sensor circuit board is arranged inside the sensor casing, a magnetic induction element is arranged on the surface of the sensor circuit board, and a detection mechanism is arranged on one side of the sensor casing; the detection mechanism includes a shield, and a floating positioning rod is arranged inside the shield. , the outer side of the floating positioning rod is provided with an upper floating block, and the bottom of the upper floating block is provided with a lower floating block. The utility model blocks and protects the sides of the upper and lower floating blocks that move up and down through the baffle, so as to prevent the waves on the water surface from directly impacting the upper and lower floating blocks, avoid the collected liquid level data from fluctuating up and down, and improve the detection of liquid level data. Accuracy.

Description

A Stable Liquid Level Sensor

technical field

The utility model relates to the technical field of sensors, in particular to a liquid level sensor with strong stability.

Background technique

The liquid level sensor is basically used to measure the liquid level in the liquid, which meets various scientific test detection.

The utility model patent of the patent application publication number CN201120393218.X discloses a liquid level sensor, which includes a welding assembly, a float, a circuit assembly and a sealing ring. The welding assembly is a cavity with a closed lower end. The external thread connected to the outside is in the shape of a cylindrical guide rod; the circuit assembly is composed of a filling resin, a reed switch and a connecting plug, and is located in the upper cavity of the welding assembly; the magnet is located in the float and is sleeved on the lower part of the welding assembly on the cylindrical guide rod; the sealing ring is located beside the outer thread of the upper part of the welding assembly and is fixed by a nut; the circuit assembly is provided with a heat shrinkable tube; the middle and the lower part of the welding assembly are respectively strengthened and fixed by a C-shaped circlip . The utility model has the advantages of compact structure, no leakage or infiltration of external liquid, long product life and high working reliability.

However, in actual use, there are still many shortcomings. For example, the sensing floating head is easily affected by liquid surface waves, which affects the accuracy of detection data and affects the use of sensors.

Utility model content

In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a liquid level sensor with strong stability, which blocks and protects the sides of the upper and lower floating blocks that move up and down through a shield, so as to avoid the direct impact of waves on the water surface. To the upper float block and the lower float block, the upper float block and the lower float block fluctuate violently on the liquid surface, avoid the collected liquid level data from fluctuating up and down, improve the detection accuracy of the liquid level data, and solve the problems raised in the above background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: a liquid level sensor with strong stability, comprising a sensor housing, a sensor mounting plate is arranged on the rear side of the device housing, and a sensor output head is arranged on the top of the sensor housing, A sensor circuit board is arranged inside the sensor casing, a magnetic induction element is arranged on the surface of the sensor circuit board, and a detection mechanism is arranged on one side of the sensor casing;

The detection mechanism includes a baffle, a floating positioning rod is arranged inside the baffle, an upper floating block is arranged outside the floating positioning rod, a lower floating block is arranged at the bottom of the upper floating block, and a connecting sleeve is arranged on the top surface of the lower floating block A magnet ring is arranged between the upper floating block and the lower floating block.

In a preferred embodiment, the number of the magnetic induction elements is set in multiples, and the magnetic induction elements are uniformly arranged on the surface of the sensor circuit board, and the magnetic induction elements are matched with the magnet coils.

In a preferred embodiment, the shape of the shield is set as a circular arc, and installation and fixing blocks are provided on both sides of the sensor housing, and the shield and the installation and fixing blocks are fixedly connected by screws.

In a preferred embodiment, the upper floating block and the lower floating block are both made of resin plastic, and both the upper floating block and the lower floating block are movably connected with the floating positioning rod.

In a preferred embodiment, the connecting sleeve is threadedly connected to the upper floating block, the magnet ring is sleeved with the connecting sleeve, and the magnet ring is made of permanent magnets.

In a preferred embodiment, the bottom end of the floating positioning rod is provided with a fixing rod, the surface of the fixing rod is provided with a sliding buckle, a spring is set between the sliding buckle and the cover, and the bottom surface of the lower floating block is provided with a spring Has a snap slot.

In a preferred embodiment, the top end of the floating positioning rod is bent toward the blocking cover and is fixedly connected with the blocking cover, and the sensor housing and the blocking cover are both fixedly connected with the fixing rod.

In a preferred embodiment, the sliding buckle is slidably connected with the fixing rod, the spring is sleeved with the fixing rod, and the sliding buckle is buckled with a buckle groove, and the buckle groove is set in a ring shape.

Technical effects and advantages of the present utility model:

1. The utility model uses the upper float block and the lower float block to clamp the magnet coil by setting the shield, and drives the magnet coil to move up and down following the change of the liquid level, and uses the magnetic induction element on the sensor circuit board to induce the magnet coil to detect and obtain the liquid level data. , use the baffle to block and protect the sides of the upper and lower floats that move up and down, so as to prevent the waves on the water surface from directly impacting the upper and lower floats, so that the upper and lower floats move violently on the liquid surface. The liquid level data fluctuates violently, which improves the detection accuracy of liquid level data;

2. The utility model uses the upper floating block and the lower floating block to be sleeved on the floating positioning rod by setting the floating positioning rod. The floating positioning rod is vertically arranged to facilitate the up and down movement of the magnet ring. The magnet ring is clamped and installed between the upper floating block and the lower floating block, which is convenient for the installation of the sensor. The sliding buckle is fastened to the buckle groove on the lower floating block, and the upper floating block and the lower floating block are fixed to prevent the sensor from floating up before use. The block and the lower float sway on the floating positioning rod to avoid damage to the sensor and affect the use of subsequent sensors.

Description of drawings

Fig. 1 is the overall schematic diagram of the utility model.

FIG. 2 is a schematic cross-sectional top view of the shield of the present invention.

FIG. 3 is an exploded schematic diagram of the upper float block and the lower float block of the present invention.

FIG. 4 is an overall schematic diagram of the shield of the present invention.

FIG. 5 is a schematic diagram of part A of FIG. 1 of the present invention.

Reference signs are: 1 sensor housing, 2 sensor mounting plate, 3 sensor output head, 4 sensor circuit board, 5 magnetic induction element, 6 shield, 7 floating positioning rod, 8 upper floating block, 9 lower floating block, 10 connecting sleeve , 11 magnet rings, 12 mounting blocks, 13 screws, 14 fixing rods, 15 sliding buckles, 16 springs, 17 snap grooves.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The utility model provides a liquid level sensor with strong stability as shown in Figs. 1-4, comprising a sensor housing 1, a sensor mounting plate 2 is arranged on the rear side of the device housing 1, and a top of the sensor housing 1 is arranged with a sensor mounting plate 2. A sensor output head 3, a sensor circuit board 4 is provided inside the sensor housing 1, a magnetic induction element 5 is provided on the surface of the sensor circuit board 4, and a detection mechanism is provided on one side of the sensor housing 1;

The detection mechanism includes a blocking cover 6 , a floating positioning rod 7 is provided inside the blocking cover 6 , an upper floating block 8 is provided outside the floating positioning rod 7 , and a lower floating block 9 is provided at the bottom of the upper floating block 8 . The top surface of the block 9 is provided with a connecting sleeve 10 , and a magnet ring 11 is provided between the upper floating block 8 and the lower floating block 9 .

Further, the number of the magnetic induction elements 5 is set in multiples, and they are evenly arranged on the surface of the sensor circuit board 4 , and the magnetic induction elements 5 are matched with the magnet coil 11 .

Further, the shape of the shield 6 is set as a circular arc, and mounting blocks 12 are provided on both sides of the sensor housing 1 , and the shield 6 and the mounting blocks 12 are fixedly connected by screws 13 .

Further, the upper floating block 8 and the lower floating block 9 are both made of resin plastic, and both the upper floating block 8 and the lower floating block 9 are movably connected with the floating positioning rod 7 .

Further, the connecting sleeve 10 is threadedly connected with the upper floating block 8 , the magnet ring 11 is sleeved with the connecting sleeve 10 , and the magnet ring 11 is made of permanent magnets.

The specific embodiment is as follows: when the sensor is in use, the upper floating block 8 and the lower floating block 9 clamp the magnet coil 11 to drive the magnet coil 11 to move up and down following the change of the liquid level, and the magnetic induction element 5 on the sensor circuit board 4 induces the magnet coil 11. According to the position of the magnetic induction element 5 of the magnet coil 11 sensed on the sensor circuit board 4, the liquid level data is detected, and the blocking cover 6 blocks and protects the sides of the upper and lower floating blocks 8 and 9 that move up and down. 6. The bottom of the shield 6 goes to the inside of the shield 6. Using the principle of the connector, the liquid level inside the shield 6 is the same as the liquid level outside the shield 6. When the wave on the outer water surface of the shield 6 directly hits the upper float 8 and the lower float 9, it will Let the upper float 8 and the lower float 9 fluctuate violently on the liquid surface. At this time, the liquid level data obtained by induction detection fluctuates violently up and down, which is inconvenient to obtain accurate liquid level data. Use the shield 6 to block the waves to avoid the shield 6 The internal liquid level also fluctuates violently with the waves, which improves the detection accuracy of liquid level data.

As shown in Figures 1-4, a liquid level sensor with strong stability is provided. The bottom end of the floating positioning rod 7 is provided with a fixing rod 14, and the surface of the fixing rod 14 is provided with a sliding buckle 15. The sliding buckle 15 is connected with A spring 16 is arranged between the baffles 6 , and a snap groove 17 is arranged on the bottom surface of the lower floating block 9 .

Further, the top end of the floating positioning rod 7 is bent toward the blocking cover 6 and is fixedly connected with the blocking cover 6 , and both the sensor housing 1 and the blocking cover 6 are fixedly connected with the fixing rod 14 .

Further, the sliding buckle 15 is slidably connected with the fixing rod 14 , the spring 16 is sleeved with the fixing rod 14 , the sliding buckle 15 is buckled with the buckle groove 17 , and the buckle groove 17 is shaped as a ring type.

The specific embodiment is as follows: when the sensor is in use, the sensor mounting plate 2 is fixedly installed on the side of the pool, the sensor is arranged vertically, and the upper floating block 8 and the lower floating block 9 move up and down on the vertically arranged floating positioning rod 7, which is convenient for the magnet ring. 11 Up and down movement line, it is convenient for the magnetic induction element 5 to sense the magnetic force of the magnet ring 11 and obtain the liquid level data. Between the upper floating block 8 and the lower floating block 9, it is convenient to install the sensor. The magnet ring 11 is a ring type. When the upper floating block 8 and the lower floating block 9 are rotated on the floating positioning rod 7, there is a gap between the magnet ring 11 and the magnetic induction element 5. The magnetic force of the sensor does not change to avoid affecting the data detection accuracy. Before the sensor is used, the sliding buckle 15 is fastened and fixed with the buckle groove 17 on the lower floating block 9, and the upper floating block 8 and the lower floating block 9 are fixed. The lower floating block 9 is fixed on the bottom end of the floating positioning rod 7 to prevent the sensor from shaking before use, such as during transportation of the sensor. , to avoid damage to the sensor and affect the use of subsequent sensors.

The working principle of the utility model:

Referring to Figures 1-4 of the description, when the sensor is in use, the upper float 8 and the lower float 9 clamp the magnet ring 11, and drive the magnet ring 11 to move up and down following the change of the liquid level, and the magnetic induction element 5 on the sensor circuit board 4 induces the magnet Ring 11, according to the position of the magnetic induction element 5 of the magnet ring 11 sensed on the sensor circuit board 4, the liquid level data is detected and obtained. The waves directly impact the upper float block 8 and the lower float block 9, so that the upper float block 8 and the lower float block 9 fluctuate violently on the liquid surface, avoid the collected liquid level data from fluctuating violently up and down, and improve the detection accuracy of the liquid level data;

Referring to Figures 1 and 5 of the description, when the sensor is in use, the upper floating block 8 and the lower floating block 9 move up and down on the vertically arranged floating positioning rod 7 to facilitate the up and down movement of the magnet ring 11. When installing the magnet ring 11, use the connection The sleeve 10 is threadedly connected with the upper floating block 8, which is convenient for the magnet ring 11 to be clamped and installed between the upper floating block 8 and the lower floating block 9, which is convenient for the installation of the sensor. 17 Snap and fix, fix the upper float 8 and the lower float 9 to prevent the upper float 8 and the lower float 9 from shaking on the floating positioning rod 7 before the sensor is used, so as to avoid damage to the sensor and affect the use of subsequent sensors.

Finally: the above is only the preferred embodiment of the present utility model, and is not intended to limit the present utility model, all within the spirit and principle of the present utility model, any modification, equivalent replacement, improvement, etc. made, should include within the scope of protection of the present invention.

Claims (8)

1. A liquid level sensor with strong stability, comprising a sensor housing (1), characterized in that: a sensor mounting plate (2) is provided on the rear side of the sensor housing (1), and a top of the sensor housing (1) is provided with a sensor mounting plate (2). A sensor output head (3) is provided, a sensor circuit board (4) is arranged inside the sensor casing (1), a magnetic induction element (5) is arranged on the surface of the sensor circuit board (4), and the sensor casing (1) There is a detection mechanism on one side; The detection mechanism comprises a blocking cover (6), a floating positioning rod (7) is arranged inside the blocking cover (6), an upper floating block (8) is provided outside the floating positioning rod (7), and the upper floating block ( 8) A lower floating block (9) is provided at the bottom, a connecting sleeve (10) is provided on the top surface of the lower floating block (9), and a magnet ring (11) is provided between the upper floating block (8) and the lower floating block (9). ). 2 . The liquid level sensor with strong stability according to claim 1 , wherein the number of the magnetic induction elements ( 5 ) is set to be multiple, and they are evenly arranged on the surface of the sensor circuit board ( 4 ). 3 . The magnetic induction element (5) is matched with the magnet coil (11). 3. The liquid level sensor with strong stability according to claim 1, characterized in that: the shape of the shield (6) is set as a circular arc, and both sides of the sensor shell (1) are provided with installation A fixing block (12), the blocking cover (6) and the mounting fixing block (12) are fixedly connected by screws (13). 4 . The liquid level sensor with strong stability according to claim 1 , wherein the upper floating block ( 8 ) and the lower floating block ( 9 ) are both made of resin plastic, and the upper floating block ( 8 ) Both the lower floating block (9) and the floating positioning rod (7) are movably connected. 5. A highly stable liquid level sensor according to claim 1, characterized in that: the connecting sleeve (10) is threadedly connected to the upper floating block (8), and the magnet ring (11) is connected to the connecting sleeve The barrel (10) is sleeved, and the magnet ring (11) is made of permanent magnets. 6. The liquid level sensor with strong stability according to claim 1, characterized in that: the bottom end of the floating positioning rod (7) is provided with a fixed rod (14), and the surface of the fixed rod (14) is provided with There is a sliding buckle (15), a spring (16) is arranged between the sliding buckle (15) and the blocking cover (6), and a buckle groove (17) is arranged on the bottom surface of the lower floating block (9). 7 . The liquid level sensor with strong stability according to claim 6 , wherein the top end of the floating positioning rod ( 7 ) is bent toward the shield ( 6 ), and is fixedly connected with the shield ( 6 ). 8 . Both the sensor housing (1) and the shield (6) are fixedly connected with the fixing rod (14). 8 . The liquid level sensor with strong stability according to claim 6 , wherein the sliding buckle ( 15 ) is slidably connected with the fixing rod ( 14 ), and the spring ( 16 ) is connected with the fixing rod ( 14 ). 9 . ) socket connection, the sliding buckle (15) is buckled with the buckle groove (17), and the buckle groove (17) is set in the shape of a ring.

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