Anti-interference liquid level sensor

Abstract

The utility model discloses an anti-interference liquid level sensor which comprises a liquid level sensor body, a connecting wire is arranged at the top of the liquid level sensor body, a shell is arranged on the liquid level sensor body, a buffering assembly and a balancing weight are arranged at the top and the bottom of the shell respectively, and a plurality of open holes are formed in the shell. Through cooperative use of the liquid level sensor body, the connecting wire, the shell, the balancing weight, the opening, the arc-shaped baffle, the limiting ring, the second damper and other structures, sharp objects moving along with water flow can be blocked, impact force generated after the sharp objects collide with a device is absorbed and buffered, the liquid level sensor body is prevented from being damaged due to collision, and the service life of the liquid level sensor is prolonged. And meanwhile, the connecting position of the liquid level sensor and the signal transmission connecting wire can be buffered, the situation that the connecting wire is driven by a drifting object to move, and consequently the connecting position is broken due to large pulling force is avoided, and then the safety of the device during working is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level sensors, in particular to an anti-interference liquid level sensor. Background Art

[0002] A liquid level sensor is a sensor that measures liquid level. According to different working principles, liquid level sensors can be divided into many types, such as ultrasonic level sensors, radar level sensors, and pressure level sensors. Among them, pressure level sensors are widely used in real-time measurement of liquid levels in scenarios where the height of liquid containers is uncertain.

[0003] For example, the utility model patent with application number: 202321397870.8 discloses a new type of liquid level sensor device, including a display, a cable and a pressure sensor assembly. The pressure sensor assembly is connected to the display through a cable. The pressure sensor assembly includes a shell, a liquid level sensor body and a liquid level sensor guide rod. The shell includes a central part and an outer edge part. The central part is a disc structure, and the longitudinal section of the outer edge part is a triangular structure and is arranged around the central part. The liquid level sensor body is installed in the central part and connected to the cable through the liquid level sensor guide rod. The pressure sensor assembly is placed in the liquid level flow basin to be measured. The outer edge part connected to the central part of the shell can buffer the liquid level fluctuations in all directions and protect the liquid level sensor body from damage caused by liquid level fluctuations. The external liquid buffered by the shell enters the shell through the water inlet hole, which can eliminate the influence of liquid level fluctuations to a certain extent, improve the measurement accuracy of the liquid level sensor body, and extend its service life.

[0004] The device in the above patent can buffer the external liquid by the outer shell during use, eliminate the influence of liquid level fluctuation to a certain extent, and improve the measurement accuracy of the liquid level sensor body. However, since the device is used in a river, there are sharp objects in the water that are easily moved by the water flow. When the object collides with the device, the impact force generated can easily cause damage to the liquid level sensor. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an anti-interference liquid level sensor.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an anti-interference liquid level sensor, comprising a liquid level sensor body, a connecting wire is arranged on the top of the liquid level sensor body, a shell is arranged on the liquid level sensor body, a buffer assembly and a counterweight are arranged on the top and bottom of the shell respectively, a plurality of openings are opened on the shell, a connecting assembly and four fixing plates are arranged on the shell, a plurality of dampers are fixedly connected to the side of the fixing plate away from the shell, an arc-shaped baffle is fixedly connected to the other end of the plurality of dampers, and a limit ring is detachably connected to the outer surface of the shell by a thread.

[0007] As a further description of the above technical solution:

[0008] The liquid level sensor body is located inside the shell, and the outer surfaces of the plurality of dampers 1 are sleeved with springs 1.

[0009] As a further description of the above technical solution:

[0010] The buffer assembly includes a buffer box and a push block, the buffer box is fixedly connected to the top of the shell, the push block is slidably connected to the inside of the buffer box, the push block is fixedly sleeved on the outer surface of the connecting wire, the connecting wire movably passes through the buffer box, and two dampers 2 and two springs 2 are fixedly installed on the top of the inner wall of the buffer box, and the two springs 2 are respectively sleeved on the outer surfaces of the two dampers 2.

[0011] As a further description of the above technical solution:

[0012] The connection assembly comprises four limiting grooves arranged in a circumferential array on the outer surface of the housing, the interiors of the four limiting grooves are all slidably connected with a mounting plate, and the mounting plate is provided with a connection groove.

[0013] As a further description of the above technical solution:

[0014] The fixing plate is slidably connected inside the connecting groove, and the top of the fixing plate abuts against the bottom of the limiting ring.

[0015] As a further description of the above technical solution:

[0016] Four clamping blocks are fixedly connected to the shell, and the four latches are arranged in a circular array. The four clamping blocks are all provided with latches, and the four latches respectively penetrate four mounting plates.

[0017] As a further description of the above technical solution:

[0018] The latch is square, and a rubber sleeve is provided on the outer surface of the latch.

[0019] The utility model has the following beneficial effects:

[0020] 1. Compared with the prior art, the anti-interference liquid level sensor, through the coordinated use of the liquid level sensor body, connecting wires, housing, counterweight, opening, arc baffle, limit ring and damper, can block sharp objects moving with the water flow, and absorb and buffer the impact force generated after the collision with the device, so as to avoid damage to the liquid level sensor body due to collision. At the same time, it can buffer the connection between the liquid level sensor and the transmission signal connecting wire, so as to avoid the floating object driving the connecting wire to move, causing the connection to break due to large tensile force, thereby improving the safety of the device during operation.

[0021] 2. Compared with the prior art, the anti-interference liquid level sensor can manually pull the latch to release the corresponding mounting plate, pull up the mounting plate to move it out of the limit groove, and slide the mounting plate and the fixing plate apart. After pushing the released fixing plate, it can be tilted and taken out of the limit groove, and the arc baffle can be easily replaced separately without screwing the limit ring, thereby improving the efficiency of separate replacement of the arc baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an anti-interference liquid level sensor proposed by the utility model;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of a limit groove and connecting wires of an anti-interference liquid level sensor proposed by the utility model;

[0025] Figure 4 This is a schematic diagram of the push block and spring structure of an anti-interference liquid level sensor proposed by the utility model;

[0026] Figure 5 This is a schematic structural diagram of a mounting plate and a fixing plate of an anti-interference liquid level sensor proposed by the utility model.

[0027] Legend:

[0028] 1. Liquid level sensor body; 2. Connecting wires; 3. Casing; 4. Counterweight; 5. Opening; 6. Fixing plate; 7. Damper 1; 8. Arc baffle; 9. Limiting ring; 10. Spring 1; 11. Buffer box; 12. Push block; 13. Damper 2; 14. Spring 2; 15. Limiting groove; 16. Mounting plate; 17. Connecting groove; 18. Block; 19. Latch; 20. Rubber sleeve. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Reference Figure 1-5 The utility model provides an anti-interference liquid level sensor: comprising a liquid level sensor body 1, a connecting wire 2 is arranged on the top of the liquid level sensor body 1, a shell 3 is arranged on the liquid level sensor body 1, the liquid level sensor body 1 is located inside the shell 3, a rubber buffer pad is arranged inside the shell 3 to reduce the collision inside the shell 3 of the liquid level sensor body 1, a buffer component and a counterweight 4 are arranged on the top and bottom of the shell 3 respectively, a plurality of openings 5 ​​are opened on the shell 3, a connecting component and four fixing plates 6 are arranged on the shell 3, and a plurality of damping The other ends of the plurality of dampers 7 are fixedly connected with arc-shaped baffles 8, and the plurality of arc-shaped baffles 8 form a circular ring, which can guide the objects during the process of intercepting and blocking them, so as to avoid the accumulation of the objects after being blocked. The outer surfaces of the plurality of dampers 7 are sleeved with springs 10, and the outer surface of the shell 3 is detachably connected with a limit ring 9 by threads. The limit ring 9 can be manually screwed to separate it from the shell 3, and then the fixed plate 6 can be directly slid up to drive the plurality of dampers 7, springs 10 and arc-shaped baffles 8 to move upward, and all the arc-shaped baffles 8 can be removed from the shell 3 for quick replacement.

[0031] The buffer assembly includes a buffer box 11 and a push block 12. The buffer box 11 is fixedly connected to the top of the outer shell 3. The push block 12 is slidably connected to the inside of the buffer box 11. The push block 12 is fixedly sleeved on the outer surface of the connecting wire 2. The connecting wire 2 movably passes through the buffer box 11. Two dampers 13 and two springs 14 are fixedly installed on the top of the inner wall of the buffer box 11.

[0032] The connecting component includes four limiting grooves 15 which are arranged in a circular array on the outer surface of the shell 3. The four limiting grooves 15 are slidably connected to the inside of a mounting plate 16. A connecting groove 17 is arranged on the mounting plate 16. The fixing plate 6 is slidably connected to the inside of the connecting groove 17. The top of the fixing plate 6 abuts against the bottom of the limiting ring 9. The fixing plate 6 is limited and fixed by screwing the limiting ring 9 after connection.

[0033] Four blocks 18 are fixedly connected to the housing 3, and each of the four blocks 18 is provided with a latch 19. The latch 19 is square, and a rubber sleeve 20 is provided on the outer surface of the latch 19. The four latches 19 pass through the four mounting plates 16 respectively. Through the provision of the rubber sleeve 20, the friction between the latch 19 and the mounting plate 16 and the block 18 can be increased, thereby improving the stability of the latch 19.

[0034] Working principle: When working, put the device into the water area where the liquid level is to be measured, and the counterweight block 4 on the shell 3 drives the device to sink, and a number of openings 5 ​​allow water to flow into the shell 3, so that the internal liquid level sensor body 1 can measure the liquid level, and output the measurement data through the connecting wire 2. When the device is in use, if there is a sharp object in the water area where it is located that moves with the water flow and collides with the device, the arc baffle 8 can block the colliding object, and the damper 7 absorbs the impact force generated by the collision. Thus, the liquid level sensor body 1 inside the housing 3 is protected. If an object in the water collides with the connecting wire 2 with the water flow, the connecting wire 2 is stretched under the action of the counterweight 4, and the moving connecting wire 2 first drives the push block 12 to slide upward inside the buffer box 11, and after the push block 12 abuts against the damper 2 13, the damper 2 13 buffers the driven push block 12 and the pulled connecting wire 2, thereby preventing the connection between the connecting wire 2 and the liquid level sensor body 1 from being broken due to a large tensile force.

[0035] When the device has been used for a period of time and part of its arc baffle 8 is damaged and needs to be replaced, the corresponding latch 19 is manually pulled to release the corresponding mounting plate 16, and then the mounting plate 16 is pulled up to move it out of the limiting groove 15, and at the same time, the mounting plate 16 is slid and separated from the fixing plate 6, and then the fixed plate 6 that has been released can be pushed and taken out from the limiting groove 15 at an angle, and then the arc baffle 8 on the fixing plate 6 can be replaced. When all the arc baffles 8 need to be replaced, the limiting ring 9 can be manually screwed to separate it from the outer shell 3, and then the fixing plate 6 can be directly slid up to drive several dampers 7, springs 10 and arc baffles 8 to move up, and then they can be removed from the outer shell 3 for quick replacement.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-interference liquid level sensor, comprising a liquid level sensor body (1), characterized in that: A connecting wire (2) is arranged on the top of the liquid level sensor body (1), a shell (3) is arranged on the liquid level sensor body (1), a buffer assembly and a counterweight (4) are arranged on the top and bottom of the shell (3), a plurality of openings (5) are opened on the shell (3), a connecting assembly and four fixing plates (6) are arranged on the shell (3), a plurality of dampers (7) are fixedly connected to the side of the fixing plate (6) away from the shell (3), and an arc-shaped baffle (8) is fixedly connected to the other end of the plurality of dampers (7), and a limit ring (9) is detachably connected to the outer surface of the shell (3) by thread.

2. The anti-interference liquid level sensor according to claim 1, characterized in that: The liquid level sensor body (1) is located inside the housing (3), and the outer surfaces of the plurality of dampers (7) are each sleeved with a spring (10).

3. The anti-interference liquid level sensor according to claim 1, characterized in that: The buffer assembly comprises a buffer box (11) and a push block (12); the buffer box (11) is fixedly connected to the top of the housing (3); the push block (12) is slidably connected to the inside of the buffer box (11); the push block (12) is fixedly sleeved on the outer surface of the connecting wire (2); the connecting wire (2) movably passes through the buffer box (11); and two dampers (13) and two springs (14) are fixedly installed on the top of the inner wall of the buffer box (11).

4. The anti-interference liquid level sensor according to claim 1, characterized in that: The connection assembly comprises four limiting grooves (15) arranged in a circular array on the outer surface of the housing (3); a mounting plate (16) is slidably connected inside the four limiting grooves (15); and a connection groove (17) is arranged on the mounting plate (16).

5. The anti-interference liquid level sensor according to claim 4, characterized in that: The fixing plate (6) is slidably connected inside the connecting groove (17), and the top of the fixing plate (6) abuts against the bottom of the limiting ring (9).

6. The anti-interference liquid level sensor according to claim 4, characterized in that: Four card blocks (18) are fixedly connected to the housing (3), and each of the four card blocks (18) is provided with a latch (19), and the four latch pins (19) respectively penetrate four mounting plates (16).

7. The anti-interference liquid level sensor according to claim 6, characterized in that: The latch pin (19) is square in shape, and a rubber sleeve (20) is provided on the outer surface of the latch pin (19).

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