A kind of input water level detector

Abstract

The utility model relates to the field of water level detector, and disclose a kind of investment formula water level detector, including gas cable, the gas cable is used to electric connection probe main part, and through compression joint connection probe main body, the side of probe main body is provided with sealing washer, its inside is equipped with stainless steel cylinder core, the most top of probe main body is equipped with 4~20mA standard signal output terminal, and the inside upper end position of this probe main body is provided with mounting bracket, and the inner wall upper end of this probe main body is equipped with shock-absorbing buffer layer.The utility model investment formula water level detector, by setting multilayer diaphragm and shock-absorbing buffer layer, realize super deep liquid level and long-term stable work under strong corrosion environment;Probe internal integration temperature compensation and signal calibration module, overcome the technical prejudice that traditional device causes temperature fluctuation to lead to the decline of measurement accuracy;Support split type and integrated mounting mode on structure, facilitate flexible application under complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of water level detectors, specifically an immersion-type water level detector. Background Technology

[0002] Existing submersible water level detectors primarily detect liquid static pressure using pressure sensors and convert it into liquid level height. However, traditional devices have shortcomings in the following aspects: severe electromagnetic interference, especially in the power and metallurgical industries, where signal drift affects accuracy; diaphragms are easily damaged, making it difficult to operate for extended periods in highly corrosive or high-pressure environments; temperature compensation is inadequate, leading to significant susceptibility of measurement results to temperature fluctuations; and the lack of flexible installation options (split / integrated) makes them unsuitable for adapting to different working conditions. Therefore, there is an urgent need to propose a novel submersible water level detector with significant improvements. Utility Model Content

[0003] The purpose of this invention is to provide an immersion-type water level detector to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An immersion-type water level detector includes an air-conducting cable for electrically connecting to a probe body and a pressure-resistant connector. A sealing gasket is provided on one side of the probe body, which contains a stainless steel core. A 4-20mA standard signal output terminal is installed at the top of the probe body, and a mounting bracket is provided at the upper internal position of the probe body. A shock-absorbing buffer layer is provided on the upper inner wall of the probe body, and an inner magnetic shielding layer is provided on the lower inner wall of the probe body. An outer sheath is fitted around the lower periphery of the probe body. A composite diaphragm structure consisting of a first diaphragm and a second diaphragm is provided at the lower end of the stainless steel core. This composite diaphragm structure is positioned opposite a ceramic sensor and is used to convert liquid static pressure into an electrical signal. The ceramic sensor is electrically connected to a signal conversion circuit board, which is sequentially connected to a temperature compensation unit and a signal calibration module, ultimately outputting a 4-20mA standard signal to the 4-20mA standard signal output terminal.

[0005] Preferably, the inner magnetic shielding layer is a multi-layer woven copper mesh structure, which can effectively reduce industrial electromagnetic interference.

[0006] Preferably, the stainless steel core is fixed to the first diaphragm and the second diaphragm by an annular support ring to achieve double-layer protection.

[0007] Preferably, the ceramic sensor is connected to the signal conversion circuit board via a flexible wire and fixed with shock-absorbing adhesive.

[0008] Preferably, the signal calibration module includes a microprocessor and a storage unit for online calibration of the ceramic sensor output.

[0009] Preferably, the shock-absorbing buffer layer is made of oil-resistant rubber and silicone composite and surrounds the outside of the water level detector.

[0010] Compared with existing technologies, this invention has the following beneficial effects: It possesses outstanding substantive features and significant advancements in the following aspects: First, by setting up multi-layered diaphragms and shock-absorbing buffer layers, it achieves long-term stable operation in ultra-deep liquid levels and highly corrosive environments; second, the introduction of an electromagnetic shielding layer inside the gas-conducting cable significantly improves its anti-interference capability and reliability in environments with strong interference, such as those in the power and petrochemical industries; third, the probe integrates temperature compensation and signal calibration modules, overcoming the technical bias of traditional devices where temperature fluctuations lead to decreased measurement accuracy; fourth, its structure supports both split-type and integrated installation modes, facilitating flexible application under complex working conditions. This invention is widely applicable to liquid level measurement and process monitoring in industries such as petrochemicals, metallurgy, power, and water treatment. Attached Figure Description

[0011] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural diagram of the submersible water level detector of this utility model; Figure 2 This is a cross-sectional view of the main body of the probe of this utility model; Figure 3 This is a partial structural diagram of the probe body of this utility model; In the diagram: 1. Air-conducting cable; 2. Outer sheath layer; 3. Pressure-resistant connector; 4. Probe body; 5. Sealing gasket; 6. Stainless steel core; 7. First diaphragm; 8. Second diaphragm; 9. Ceramic sensor; 10. Signal conversion circuit board; 11. Temperature compensation unit; 12. Signal calibration module; 13. Inner magnetic shielding layer; 14. Shock-absorbing buffer layer; 15. 4~20mA standard signal output terminal; 16. Mounting bracket. Detailed Implementation

[0012] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. In the embodiments of the present utility model, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components in the drawings.

[0013] Please see Figure 1-3An immersion-type water level detector includes an air-conducting cable 1, which is used to electrically connect to a probe body 4 and is connected to the probe body 4 via a pressure-resistant connector 3. A sealing gasket 5 is provided on one side of the probe body 4, and a stainless steel core 6 is provided inside. A 4~20mA standard signal output terminal 15 is installed at the top of the probe body 4, and a mounting bracket 16 is provided at the upper internal position of the probe body 4. A shock-absorbing buffer layer 14 is provided on the upper inner wall of the probe body 4, and an internal magnetic shield is provided on the lower inner wall of the probe body 4. Layer 13, the lower part of the probe body 4 is covered with an outer sheath layer 2, the lower end of the stainless steel core 6 is provided with a composite diaphragm structure composed of a first diaphragm 7 and a second diaphragm 8, the composite diaphragm structure is arranged opposite to the ceramic sensor 9, and is used to convert liquid static pressure into an electrical signal, the ceramic sensor 9 is electrically connected to the signal conversion circuit board 10, the signal conversion circuit board 10 is connected in sequence to the temperature compensation unit 11 and the signal calibration module 12, and finally outputs a 4~20mA standard signal to the 4~20mA standard signal output terminal 15.

[0014] Among them, the inner magnetic shielding layer 13 is a multi-layer woven copper mesh structure, which can effectively reduce industrial electromagnetic interference.

[0015] The stainless steel core 6 is fixed to the first diaphragm 7 and the second diaphragm 8 by an annular support ring, achieving double-layer protection.

[0016] The ceramic sensor 9 is connected to the signal conversion circuit board 10 by a flexible wire and fixed with shock-absorbing adhesive.

[0017] The signal calibration module 12 includes a microprocessor and a storage unit, which is used to calibrate the output of the ceramic sensor 9 online.

[0018] The shock-absorbing buffer layer 14 is made of oil-resistant rubber and silicone composite and surrounds the outside of the water level detector.

[0019] It should be noted that this submersible water level detector measures liquid level based on the principle of hydrostatic pressure, and its core working process is as follows: When the probe is immersed in the liquid, the liquid column generates hydrostatic pressure on the diaphragm. The first diaphragm 7 and the second diaphragm 10, as a composite structure, respectively withstand the direct pressure of the liquid and the buffered, balanced pressure, thus achieving double-layer protection. The hydrostatic pressure increases with liquid depth, causing the composite diaphragm to undergo slight deformation, transmitting the pressure to the ceramic sensor 9 inside the stainless steel core 6. The ceramic sensor 9 utilizes the piezoresistive effect to convert the pressure change into an electrical signal, which is then transmitted to the signal conversion circuit board 10 via a flexible wire.

[0020] The signal conversion circuit board 10 amplifies and linearizes the weak electrical signal before transmitting it to the temperature compensation unit 11. The temperature compensation unit 11 monitors the liquid temperature in real time and automatically corrects the zero-point drift of the ceramic sensor 9, ensuring accuracy under high and low temperature environments. The corrected signal further enters the signal calibration module 12, which includes a microprocessor and storage unit. This module can perform nonlinear correction according to a preset curve and supports automatic drift compensation during long-term operation. Finally, the calibrated signal is output through the 4-20mA standard output terminal 15, achieving seamless connection with the industrial control system.

[0021] In terms of structural protection, the electromagnetic shielding layer inside the air-conducting cable 1 effectively weakens external electromagnetic interference. The probe shell is made of stainless steel and has a shock-absorbing buffer layer 14, which can absorb liquid impact and mechanical vibration, thereby extending the sensor life.

[0022] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0023] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A submersible water level detector, comprising an air-conducting cable (1), characterized in that: The gas-conducting cable (1) is used to electrically connect the probe body (4) and is connected to the probe body (4) through a pressure-resistant connector (3). A sealing gasket (5) is provided on one side of the probe body (4), and a stainless steel core (6) is provided inside. A 4~20mA standard signal output terminal (15) is installed at the top of the probe body (4), and a mounting bracket (16) is provided at the upper internal position of the probe body (4). A shock-absorbing buffer layer (14) is provided at the upper inner wall of the probe body (4), and an inner magnetic shielding layer (13) is provided at the lower inner wall of the probe body (4). The lower part of the outer periphery of the head body (4) is covered with an outer sheath layer (2). The lower end of the stainless steel cylinder core (6) is provided with a composite diaphragm structure composed of a first diaphragm (7) and a second diaphragm (8). The composite diaphragm structure is arranged opposite to the ceramic sensor (9) and is used to convert liquid static pressure into an electrical signal. The ceramic sensor (9) is electrically connected to the signal conversion circuit board (10). The signal conversion circuit board (10) is connected in sequence to the temperature compensation unit (11) and the signal calibration module (12), and finally outputs a 4~20mA standard signal to the 4~20mA standard signal output terminal (15).

2. The submersible water level detector according to claim 1, characterized in that: The inner magnetic shielding layer (13) is a multi-layer woven copper mesh structure, which can effectively reduce industrial electromagnetic interference.

3. The submersible water level detector according to claim 1, characterized in that: The stainless steel core (6) is fixed to the first diaphragm (7) and the second diaphragm (8) by an annular support ring to achieve double-layer protection.

4. The submersible water level detector according to claim 1, characterized in that: The ceramic sensor (9) is connected to the signal conversion circuit board (10) by a flexible wire and fixed with shock-absorbing adhesive.

5. The submersible water level detector according to claim 1, characterized in that: The signal calibration module (12) includes a microprocessor and a storage unit for online calibration of the output of the ceramic sensor (9).

6. The submersible water level detector according to claim 1, characterized in that: The shock-absorbing buffer layer (14) is made of oil-resistant rubber and silicone composite and surrounds the outside of the water level detector.

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