CN216348947U

CN216348947U - Flexible liquid level sensor

Info

Publication number: CN216348947U
Application number: CN202122803686.6U
Authority: CN
Inventors: 宁润苏; 邹江波; 闫进峰
Original assignee: Jiangsu Dingli Huaye Measurement And Control Technology Co ltd
Current assignee: Jiangsu Dingli Huaye Measurement And Control Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-04-19
Anticipated expiration: 2031-11-16

Abstract

The utility model relates to a flexible liquid level sensor, which comprises a pipe body and a circuit board, wherein the pipe body is provided with a plurality of through holes; the pipe body is made of a non-magnetic material, the pipe body is vertically arranged, and the top end of the pipe body is provided with a plug used for sealing the top end of the pipe body; the circuit board is strip-shaped and is vertically arranged in the tube body; the circuit board is provided with a plurality of magnetic switches which are vertically arranged on the circuit board at intervals; the output end of the circuit board is electrically connected with a first lead, and the first lead penetrates out of the tube body through the opening at the bottom end of the tube body and is electrically connected with a control terminal; any one of the magnetic switches is conducted under the action of the magnetic force of an external magnetic force piece so as to connect the circuit board into the circuit, and the control terminal receives the electric signal of the circuit board and converts the electric signal into a digital signal. The utility model has the advantages of no magnetism, high precision, low cost, convenient transportation and installation and the like, and can be well suitable for the liquid level signal measurement and remote transmission of the industrial field liquid level meter.

Description

Flexible liquid level sensor

Technical Field

The utility model relates to the field of instruments and meters, in particular to a flexible liquid level sensor.

Background

At present, the on-site liquid level display device in the industrial field is usually realized by a magnetic turning plate liquid level meter. The container to be measured is connected with the bypass pipe through the flange, the liquid level in the bypass pipe is consistent with the liquid level in the container to be measured in height, the magnetic floater floats on the liquid level, when the liquid level in the container to be measured rises and falls, the floater in the pipe also rises and falls along with the liquid level, and the permanent magnet in the floater drives the red and white turnover column in the magnetic turnover plate to turn over through magnetic coupling, so that on-site liquid level display is realized. If the magnetic turning plate liquid level meter needs to realize the transmission and the transmission of liquid level signals, the dry reed type liquid level transmitter needs to be utilized to realize the electric signal conversion of liquid level information. The reed switch sensor is fixed on the outer side of the bypass pipe, and when the magnetic floater outside the pipe changes up and down along with the liquid level, the corresponding reed switch (or the magnetic COMS switch) is attracted, so that the output resistance value of the sensor changes, and the sensor is converted into 4-20mA or 485 mode for output through electric signal processing.

The existing reed pipe liquid level sensor has the following defects: the whole sensor is rigid, so that great inconvenience is brought to production, transportation and installation, the sensor is easy to deform and damage, and particularly, when the height of a liquid level to be measured is high and the size of the sensor is long; in the production and processing process of the stainless steel pipe, the stainless steel pipe is easy to have magnetism due to processes such as deformation, annealing and the like, so that the measurement result of the liquid level meter is inaccurate, and even no reading can be measured; high quality stainless steel tubes are costly.

Disclosure of Invention

In summary, in order to overcome the defects of the prior art, the utility model provides a flexible liquid level sensor.

The technical scheme for solving the technical problems is as follows: a flexible liquid level sensor comprises a pipe body and a circuit board; the pipe body is made of a non-magnetic material, the pipe body is vertically arranged, and the top end of the pipe body is provided with a plug used for sealing the top end of the pipe body; the circuit board is strip-shaped and is vertically arranged in the tube body; the circuit board is provided with a plurality of magnetic switches which are vertically arranged on the circuit board at intervals; the output end of the circuit board is electrically connected with a first lead, and the first lead penetrates out of the tube body through the opening at the bottom end of the tube body and is electrically connected with a control terminal; any one of the magnetic switches is conducted under the action of the magnetic force of an external magnetic force piece so as to connect the circuit board into the circuit, and the control terminal receives the electric signal of the circuit board and converts the electric signal into a digital signal.

On the basis of the technical scheme, the utility model can be further improved as follows.

Further, an explosion-proof junction box is fixedly mounted at the bottom end of the tube body, the first lead is electrically connected with the input end of the explosion-proof junction box, and the output end of the explosion-proof junction box is electrically connected with the input end of the control terminal.

The anti-explosion wiring box has the advantages that the anti-explosion wiring box can take anti-explosion measures through the anti-explosion wiring box, and the safety of the device during working is guaranteed.

Furthermore, the bottom end of the tube body is connected and communicated with the explosion-proof junction box through a conversion head, and the first wire penetrates into the explosion-proof junction box through the conversion head and is electrically connected with the input end of the explosion-proof junction box.

The beneficial effect who adopts above-mentioned further scheme is that, through the setting of conversion head, can turn to the installation according to actual conditions, improve the flexibility of its practicality and installation.

Furthermore, a wire outlet hole is formed in the bottom end of the explosion-proof junction box, a sealing ring is embedded in the wire outlet hole and fixedly installed in the wire outlet hole through a packing screw, a second wire is electrically connected to the output end of the explosion-proof junction box, penetrates out of the explosion-proof junction box through the wire outlet hole, the sealing ring and the inner hole of the packing screw and is detachably and electrically connected with the input end of the control terminal through a navigation plug connector.

Adopt above-mentioned further scheme's beneficial effect be used for the sealed of explosion-proof terminal box through sealing washer and compel tight screw.

Further, the pipe body is made of ethylene propylene diene monomer rubber materials.

The beneficial effect who adopts above-mentioned further scheme is that, the body adopts the EPT rubber material to make, has advantages such as resistant high low temperature, corrosion-resistant, ageing resistance, can provide the guarantee in outdoor work for a long time, has the characteristics that the pliability is good, high tensile strength, low permanent deformation simultaneously, fine protection inside circuit system when guaranteeing good flexibility.

Further, the circuit board is a flexible circuit board.

The further scheme has the beneficial effects that compared with a rigid circuit board, the flexible printed circuit board has the advantages of good flexibility, bending, long maximum length, long service life and the like.

The utility model has the beneficial effects that: the liquid level gauge has the advantages of no magnetism, high precision, low cost, convenience in transportation and installation and the like, and can be well suitable for liquid level signal measurement and remote transmission of industrial field liquid level gauges.

Drawings

Fig. 1 is an overall structural view of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a pipe body; 2. a plug; 3. a circuit board; 4. an explosion-proof junction box; 5. a conversion head; 6. a seal ring; 7. tightly pressing the screw; 8. an aviation plug connector; 9. a bypass pipe; 10. a magnetic float.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, the present embodiment provides a flexible liquid level sensor, which includes a pipe body 1 and a circuit board 3; the pipe body 1 is made of a non-magnetic material, the pipe body 1 is vertically arranged, and the top end of the pipe body 1 is provided with a plug 2 for sealing the top end of the pipe body 1; the circuit board 3 is strip-shaped and is vertically arranged in the tube body 1; the circuit board 3 is provided with a plurality of magnetic switches which are vertically arranged on the circuit board 3 at intervals; the output end of the circuit board 3 is electrically connected with a first lead, and the first lead penetrates out of the tube body 1 through the bottom opening of the tube body 1 and is electrically connected with a control terminal; any one of the magnetic switches is conducted under the action of the magnetic force of the external magnetic force piece so as to connect the circuit board 3 into the circuit, and the control terminal receives the electric signal of the circuit board 3 and converts the electric signal into a digital signal.

The control terminal can be an SMT32 series single-chip microcomputer with a digital display function.

Preferably, in this embodiment, an explosion-proof junction box 4 (for the prior art, not described herein) is fixedly mounted at the bottom end of the tube body 1, the first wire is electrically connected to an input end of the explosion-proof junction box 4, and an output end of the explosion-proof junction box 4 is electrically connected to an input end of the control terminal. Through the setting of explosion-proof terminal box 4, can play explosion-proof measure, guarantee the security of the device during operation.

Further, the bottom end of the tube body 1 is connected and communicated with the explosion-proof junction box 4 through the conversion head 5, and the first wire penetrates into the explosion-proof junction box 4 through the conversion head 5 and is electrically connected with the input end of the explosion-proof junction box 4. By arranging the conversion head 5, the steering installation can be performed according to actual conditions, and the practicability and the installation flexibility are improved.

Furthermore, a wire outlet hole is formed in the bottom end of the explosion-proof junction box 4, a sealing ring 6 is embedded in the wire outlet hole, the sealing ring 6 is fixedly installed in the wire outlet hole through a tightening screw 7, the output end of the explosion-proof junction box 4 is electrically connected with a second wire, and the second wire penetrates out of the explosion-proof junction box 4 through the wire outlet hole, the sealing ring 6 and the inner hole of the tightening screw 7 and is detachably and electrically connected with the input end of the control terminal through a navigation plug connector 8. The sealing ring 6 and the tightening screw 7 are used for sealing the explosion-proof junction box 4.

Further, the pipe body 1 is made of an ethylene propylene diene monomer material. The flexible cable has the advantages of high and low temperature resistance, corrosion resistance, ageing resistance and the like, can provide guarantee for long-term outdoor work, has the characteristics of good flexibility, high tensile strength and low permanent deformation, and well protects an internal circuit system while ensuring good flexibility

Further, the wiring board 3 is a flexible wiring board. Has the advantages of good flexibility, bending, long maximum length, long service life and the like.

The working process is explained fully below:

installing the circuit board 3 in the pipe body 1, sealing the top of the pipe body 1 through the plug 2, completing the electric connection of the circuit board 3 and a control terminal through a first lead, finally vertically installing the pipe body 1 outside the by-pass pipe 9, enabling the pipe body 1 to be parallel to the by-pass pipe 9, arranging a magnetic floater 10 in the by-pass pipe 9, and the magnetic floater 10 floats on the liquid level of the bypass pipe 9, and moves up and down along with the rise and fall of the liquid level, the magnetic floater 10 can make the magnetic switch near the magnetic floater 10 in the tube body 1 conduct under the magnetic force of the magnetic floater 10, so that the circuit board 3 is connected into the circuit, therefore, the control terminal receives the electric signals of the circuit board 3 and converts the electric signals into digital signals (namely, each magnetic switch corresponds to one liquid level depth value, and the corresponding magnetic switch is conducted, at the moment, the control terminal can directly display the corresponding liquid level value), so that people can read out the value change.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A flexible liquid level sensor is characterized by comprising a pipe body (1) and a circuit board (3);

the pipe body (1) is made of a non-magnetic material, the pipe body (1) is vertically arranged, and the top end of the pipe body (1) is provided with a plug (2) used for sealing the top end of the pipe body (1);

the circuit board (3) is strip-shaped and is vertically arranged in the pipe body (1); the circuit board (3) is provided with a plurality of magnetic switches which are vertically arranged on the circuit board (3) at intervals; the output end of the circuit board (3) is electrically connected with a first lead, and the first lead penetrates out of the tube body (1) through the bottom opening of the tube body (1) and is electrically connected with a control terminal;

any one of the magnetic switches is conducted under the action of the magnetic force of an external magnetic force piece so as to connect the circuit board (3) into the circuit, and the control terminal receives the electric signal of the circuit board (3) and converts the electric signal into a digital signal.

2. The flexible liquid level sensor according to claim 1, wherein an explosion-proof junction box (4) is fixedly mounted at the bottom end of the pipe body (1), the first lead is electrically connected with an input end of the explosion-proof junction box (4), and an output end of the explosion-proof junction box (4) is electrically connected with an input end of the control terminal.

3. The flexible liquid level sensor according to claim 2, wherein the bottom end of the pipe body (1) is connected and communicated with the explosion-proof junction box (4) through a conversion head (5), and the first lead penetrates into the explosion-proof junction box (4) through the conversion head (5) and is electrically connected with the input end of the explosion-proof junction box (4).

4. The flexible liquid level sensor according to claim 3, wherein a wire outlet hole is formed at the bottom end of the explosion-proof junction box (4), a sealing ring (6) is embedded in the wire outlet hole, the sealing ring (6) is fixedly mounted in the wire outlet hole through a fastening screw (7), the output end of the explosion-proof junction box (4) is electrically connected with a second wire, and the second wire penetrates out of the explosion-proof junction box (4) through the wire outlet hole, the inner holes of the sealing ring (6) and the fastening screw (7) and is detachably and electrically connected with the input end of the control terminal through a navigation plug connector (8).

5. A flexible level sensor according to claim 4, characterized in that the tube body (1) is made of ethylene propylene diene monomer material.

6. A flexible level sensor according to any one of claims 1-5, characterized in that the circuit board (3) is a flexible circuit board.