Detection structure of multi-polar-plate capacitive liquid level meter

Abstract

The utility model relates to the technical field of capacitive liquid level meters, and discloses a detection structure of a multi-polar-plate capacitive liquid level meter, which comprises a multi-polar-plate structure, the multi-polar-plate structure comprises an inner polar plate, a middle polar plate sleeved on the outer side of the inner polar plate and an outer polar plate sleeved on the outer side of the middle polar plate, and the top of the multi-polar-plate structure is provided with a joint structure. An insulating base plate is arranged on the outer side of the connector structure. By adopting the design that the two measuring polar plates and the two reference polar plates are uniformly distributed around the same central point, the measuring polar plates and the reference polar plates, namely multiple electrodes, have consistent space electric fields, and due to the symmetry of the electric fields, the influence of medium change on the measuring polar plates and the reference polar plates can be kept relatively consistent; the detection precision and stability can be corrected through signal amplification between every two pole plates of the inner pole plate, the middle pole plate and the outer pole plate so as to adapt to differences caused by changes of liquid media, repeated recalibration of the capacitive liquid level meter is not needed, and the use effect is extremely good.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitance type liquid level gauges, in particular to a detection structure of a multi-electrode capacitance type liquid level gauge. Background Art

[0002] Current capacitive level gauges typically utilize either unipolar or bipolar plates. The disadvantage of unipolar plates is that they require external structures such as piping as one of the plates, making them significantly susceptible to external conditions. Each change in the dielectric constant of the liquid medium requires recalibration, making the gauge incapable of adapting to the variability introduced by different liquid media. The disadvantage of bipolar plates is that they cannot guarantee high accuracy, resulting in a lack of comparison and limited precision. Utility Model Content

[0003] The purpose of the utility model is to solve the problems existing in the prior art and to propose a detection structure of a multi-electrode capacitive liquid level gauge.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A detection structure of a multi-electrode capacitive liquid level gauge includes a multi-electrode plate structure, wherein the multi-electrode plate structure includes an inner plate, a middle plate mounted on the outside of the inner plate, and an outer plate mounted on the outside of the middle plate. A joint structure is provided on the top of the multi-electrode plate structure, an insulating pad is provided on the outside of the joint structure, a fixed mounting piece is provided on the top of the insulating pad, and a signal transmission structure is installed on the top of the fixed mounting piece.

[0006] Preferably, the joint structure includes a through-plate socket installed on the top of the multi-electrode plate structure and a plate joint vertically fixed through the through-plate socket. There are three plate joints, which are respectively connected to the top of the inner plate, the middle plate and the outer plate.

[0007] Preferably, a fixing sleeve is provided at the end of the multi-electrode plate structure, a fixing pin is installed on the inner periphery of the fixing sleeve, and the inner electrode plate, the middle electrode plate and the outer electrode plate are fixed and limited by the fixing pin.

[0008] Preferably, a sealing member is provided between the insulating pad and the fixed mounting member, and the sealing member is made of rubber.

[0009] Preferably, the fixed mounting member is a flange.

[0010] Preferably, the signal transmission structure includes a flange aviation plug installed on the top of the fixed installation component and an aviation plug connector provided on one side of the flange aviation plug, and the aviation plug connector is electrically connected to the plate connector.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model adopts a design in which two measuring plates and a reference plate are evenly distributed around the same center point, thereby ensuring that the measuring plates and the reference plate, i.e., the multiple electrodes, have a consistent spatial electric field. Due to the symmetry of the electric field, the effects of medium changes on the measuring plates and the reference plates can remain relatively consistent. By amplifying the signal between every two plates of the inner, middle, and outer plates, the detection accuracy and stability can be corrected to adapt to the differences brought about by changes in the liquid medium. There is no need to repeatedly recalibrate the capacitive liquid level meter, and the use effect is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional schematic diagram of the detection structure of a multi-electrode capacitive liquid level gauge proposed by the present invention;

[0014] Figure 2 This is a bottom-up perspective diagram of a detection structure of a multi-electrode capacitive liquid level gauge proposed by the present invention;

[0015] Figure 3 This is a three-dimensional schematic diagram of the through-board socket portion of the detection structure of a multi-electrode capacitive liquid level gauge proposed in the utility model.

[0016] In the figure: 1. Inner plate; 2. Middle plate; 3. Outer plate; 4. Insulating pad; 5. Fixing parts; 6. Through-plate socket; 7. Plate connector; 8. Fixing sleeve; 9. Fixing pin; 10. Seal; 11. Flange aviation plug; 12. Aviation plug connector. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Reference Figure 1-Figure 3 A detection structure of a multi-electrode capacitive liquid level gauge includes a multi-electrode plate structure, wherein the multi-electrode plate structure includes an inner plate 1, a middle plate 2 mounted on the outside of the inner plate 1, and an outer plate 3 mounted on the outside of the middle plate 2. A joint structure is provided on the top of the multi-electrode plate structure, an insulating pad 4 is provided on the outside of the joint structure, a fixed mounting part 5 is provided on the top of the insulating pad 4, and a signal transmission structure is installed on the top of the fixed mounting part 5. The inner plate 1, the middle plate 2 and the outer plate 3 are evenly distributed around the same center point.

[0019] This detection structure adopts a design in which the inner plate 1, the middle plate 2 and the outer plate 3 (i.e., two measuring plates and a reference plate) are evenly distributed around the same center point (with the reference plate included), which can ensure that the measuring plates and the reference plates, i.e., the multiple electrodes, have a consistent spatial electric field. Due to the symmetry of the electric field, the impact of medium changes on the measuring plates and the reference plates can remain relatively consistent. By amplifying the signal between each two plates of the inner, middle and outer plates, the detection accuracy and stability can be corrected to adapt to the differences brought about by changes in the liquid medium. There is no need to repeatedly recalibrate the capacitive level meter, and the use effect is excellent.

[0020] In this embodiment, the joint structure includes a through-plate socket 6 installed on the top of the multi-electrode plate structure and a plate joint 7 vertically fixed through the through-plate socket 6. There are three plate joints 7, which are respectively connected to the top of the inner plate 1, the middle plate 2 and the outer plate 3.

[0021] In this embodiment, a fixing sleeve 8 is provided at the end of the multi-electrode plate structure, and a fixing pin 9 is installed on the inner periphery of the fixing sleeve 8. The inner plate 1, the middle plate 2 and the outer plate 3 are fixed and limited by the fixing pin 9 passing through, thereby fixing the relative positions of the three plates.

[0022] In this embodiment, a sealing member 10 is provided between the insulating pad 4 and the fixed installation member 5 , and the sealing member 10 is made of rubber, so that a seal is formed between the insulating pad 4 and the fixed installation member 5 .

[0023] In this embodiment, the fixed installation member 5 is a flange, which is used to fix the liquid level meter as a whole on related equipment.

[0024] In this embodiment, the signal transmission structure includes a flange aviation plug 11 installed on the top of the fixed mounting part 5 and an aviation plug connector 12 arranged on one side of the flange aviation plug 11. The aviation plug connector 12 is electrically connected to the plate connector 7. After the aviation plug connector 12 is connected, it can be used to input and output various signals. For example, when the height of the measured medium infiltrating the measuring electrode changes, it causes a change in capacitance, which is converted into a standard current signal output through the measurement system circuit, thereby realizing the detection of liquid level changes.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A detection structure of a multi-electrode capacitive liquid level gauge, characterized by: It includes a multi-polar plate structure, which includes an inner plate, a middle plate mounted on the outside of the inner plate, and an outer plate mounted on the outside of the middle plate. A joint structure is provided on the top of the multi-polar plate structure, an insulating pad is provided on the outside of the joint structure, a fixed mounting piece is provided on the top of the insulating pad, and a signal transmission structure is installed on the top of the fixed mounting piece.

2. The detection structure of a multi-electrode capacitive liquid level gauge according to claim 1, characterized in that: The joint structure includes a through-plate socket installed on the top of the multi-plate structure and a plate joint vertically fixed and passing through the through-plate socket. There are three plate joints, which are respectively connected to the top of the inner plate, the middle plate and the outer plate.

3. The detection structure of a multi-electrode capacitive liquid level gauge according to claim 2, characterized in that: A fixing sleeve is provided at the end of the multi-electrode plate structure, a fixing pin is installed on the inner periphery of the fixing sleeve, and the inner electrode plate, the middle electrode plate and the outer electrode plate are fixed and limited by the fixing pin.

4. The detection structure of a multi-electrode capacitive liquid level gauge according to claim 1, characterized in that: A sealing member is provided between the insulating pad and the fixing mounting member, and the sealing member is made of rubber.

5. The detection structure of a multi-electrode capacitive liquid level gauge according to claim 1, characterized in that: The fixed installation part is a flange.

6. The detection structure of a multi-electrode capacitive liquid level gauge according to claim 3, characterized in that: The signal transmission structure includes a flange aviation plug installed on the top of the fixed installation part and an aviation plug connector arranged on one side of the flange aviation plug, and the aviation plug connector is electrically connected to the plate connector.

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