Throw-in type liquid level transmitter safety isolation device

Abstract

The invention aims at the field of industrial automation instruments, and provides a throw-in type liquid level transmitter safety isolation device. The device aims at solving the problems that traditional equipment is prone to being damaged in a complex and severe environment, and the measurement accuracy is reduced. Isolation protection of detected liquid is achieved through the combined pressure liquid storage bag, the safe connection liquid level indicating pipe and the throw-in type liquid level transmitter. Wherein the pressure liquid storage bag is resistant to acid, alkali and corrosion and serves as a measurement medium; the designed length of the safety connection liquid level indicating tube exceeds the maximum depth of the measured liquid and is used for transmitting liquid level change; the throw-in type liquid level transmitter probe is arranged in the liquid storage bag, and the external liquid level is indirectly measured by measuring the pressure change of internal liquid. The device has the advantages of being accurate in measurement, stable, reliable, easy to maintain and the like, and is suitable for various complex and severe environments such as nanofiltration and reverse osmosis concentrated water tanks, sewage treatment plants, petrochemical engineering and the like. A novel liquid level measurement solution is provided for the field of industrial automation instruments, and the liquid level sensor has wide market application prospects.

Description

Technical Field

[0001] The present invention relates to the field of industrial automation instrument technology, and in particular to the design and application of a safety isolation device for a submersible liquid level transmitter. The device aims to solve the problems of high failure rate, short life, poor stability, etc. of traditional submersible liquid level transmitters due to direct contact with the measured liquid under complex and harsh working conditions, and achieves accurate and stable measurement of the liquid level through an innovative isolation design. Background Art

[0002] As a commonly used liquid level measuring instrument in the field of industrial automation, the submersible liquid level transmitter has the advantages of high measurement accuracy, easy installation, and stable signal. However, in some special environments, such as poor water quality, many impurities, high salt content, rapid scaling, and large liquid level fluctuations, traditional submersible liquid level transmitters are easily corroded, blocked, or damaged, resulting in reduced measurement accuracy and shortened service life. Therefore, the development of a submersible liquid level transmitter safety isolation device that can adapt to complex and harsh working conditions is of great significance to improving the accuracy and stability of liquid level measurement. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention proposes a safety isolation device for a submersible liquid level transmitter, which includes a pressure liquid storage bag, a safety connection liquid level indicator tube and a submersible liquid level transmitter. The pressure liquid storage bag is used to contain liquid and serve as a medium for liquid level measurement. Its material is acid-resistant, alkali-resistant and corrosion-resistant to improve the durability and measurement accuracy of the device. The safety connection liquid level indicator tube is connected to the pressure liquid storage bag to transmit liquid level change information. Its design length exceeds the maximum depth of the measured liquid to prevent the measured liquid from mixing with the liquid inside the device. The probe of the submersible liquid level transmitter is placed in the pressure liquid storage bag, and the external liquid level is indirectly measured by measuring the pressure change of the liquid in the pressure liquid storage bag.

[0004] The safety isolation device for the immersion liquid level transmitter of the present invention has the following advantages:

[0005] Isolation protection: The isolation design of the pressure reservoir and the safety connection level indicator tube effectively avoids direct contact between the measured liquid and the submersible level transmitter, thereby reducing the risk of corrosion, blockage and damage and extending the service life of the equipment.

[0006] Accurate measurement: The liquid in the pressure storage bag is affected by the external air pressure and water pressure to achieve accurate detection of the liquid level, improving the accuracy and stability of the measurement.

[0007] Widely applicable: The device is suitable for a variety of complex and harsh working conditions, such as nanofiltration and reverse osmosis concentrate tanks, backwash recovery tanks, chemical agent cylinder level indication, as well as liquid level monitoring in sewage treatment plants, petrochemical industry, water conservancy industry and food industry.

[0008] Easy to maintain: The pressure reservoir and the safety-connected liquid level indicator tube are connected by a hinged seal, which is easy to install, maintain and replace, reducing maintenance costs.

[0009] In summary, the immersion type liquid level transmitter safety isolation device of the present invention provides a new liquid level measurement solution for the field of industrial automation instruments with its high efficiency, reliability and durability, and has broad market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the safety isolation device of the immersion liquid level transmitter.

Claims

1. A safety isolation device for a submersible liquid level transmitter, characterized in that: include: A pressure reservoir, which is used to contain liquid and serve as a medium for level measurement; A liquid level indicator tube is securely connected to the pressure liquid storage bag to transmit information on liquid level changes; A submersible liquid level transmitter, whose probe is placed in the pressure storage bag, indirectly measures the external liquid level by measuring the pressure change of the liquid in the pressure storage bag; Among them, the volume of the pressure liquid storage bag is greater than or equal to the volume of the safety-connected liquid level indicator tube. The design length of the safety-connected liquid level indicator tube needs to exceed the maximum depth of the liquid to be measured to prevent the liquid to be measured from mixing with the liquid inside the device, ensuring that the liquid inside the device is isolated from the external liquid to be measured to avoid corrosion, blockage or damage caused by direct contact.

2. The safety isolation device for the submersible liquid level transmitter according to claim 1 is characterized in that: The pressure liquid storage bag is made of acid-resistant, alkali-resistant and corrosion-resistant materials, such as silicone, soft PVC or TPU, to improve the durability and measurement accuracy of the device.

3. The safety isolation device for the submersible liquid level transmitter according to claim 1 or 2, characterized in that: The safety connection liquid level indicator tube is made of UPCV material and has sufficient strength and chemical stability to adapt to different working conditions.

4. The safety isolation device for the submersible liquid level transmitter according to claim 1 is characterized in that: The pressure liquid storage bag and the safety connection liquid level indicator tube are connected in a hinged sealing manner, which is convenient for installation, maintenance and replacement.

5. The safety isolation device for the submersible liquid level transmitter according to claim 1 is characterized in that: The device has a damping effect, and reduces the influence of liquid level fluctuation on the measured value through the physical characteristics of the pressure liquid storage bag, thereby improving the measurement stability and the stability of the automatic control system.

6. The safety isolation device for the submersible liquid level transmitter according to claim 1 is characterized in that: The device is suitable for a variety of complex and harsh working environments, including but not limited to nanofiltration and reverse osmosis concentrate tanks, backwash recovery tanks, chemical agent cylinder level indication, and liquid level monitoring in sewage treatment plants, petrochemical industry, water conservancy industry and food industry.

7. A method for liquid level measurement using the immersion type liquid level transmitter safety isolation device according to any one of claims 1 to 6, characterized in that: Includes steps: 7.1 Fill the pressure reservoir with sufficient water; 7.2 Place the assembled device into the liquid to be tested; 7.3 The pressure change of the liquid in the pressure storage bag is measured by a submersible liquid level transmitter, and the liquid level of the external measured liquid is calculated based on the relationship between pressure and liquid level.

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