Liquid level monitoring device of immersed subrack and immersed subrack

Abstract

The utility model provides a liquid level monitoring device of an immersed plug-in box and the immersed plug-in box, which belong to the field of energy storage plug-in boxes, and comprise a capacitor assembly vertically arranged on the inner side wall of the immersed plug-in box; the detection assembly is electrically connected with the capacitor assembly; the bottom end of the capacitor assembly abuts against the bottom face of the immersed plug-in box, liquid in the immersed plug-in box enters the capacitor assembly from an opening in the bottom of the capacitor assembly, and the liquid level in the capacitor assembly is consistent with the liquid level in the immersed plug-in box. The detection assembly detects the capacitance of the capacitor assembly; and the liquid level change of the liquid in the capacitor assembly is obtained through conversion of the capacitance change of the capacitor assembly. The capacitive sensor is formed by the inner electrode and the outer electrode, and the change condition of the liquid level in the capacitor can be accurately obtained by detecting the change condition of the capacitor, so that the change condition of the liquid level in the unpacking box can be obtained, and the detection process is not influenced by the internal pressure and the liquid flow rate of the plug-in box.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage plug -in box technical field especially relates to a liquid level monitoring device and immersion plug -in box of immersion plug -in box. BACKGROUND

[0002] For immersion plug -in box, the inside of plug -in box is full of an oily substance (hydrocarbon), in the process of filling in the plug -in box and filling in this oil, we need to know the filling liquid level, without monitoring means, we cannot directly observe the liquid level height. At present, there are several schemes: the first is to directly observe the liquid level through the addition of a window, the second is to indirectly observe the liquid level through various liquid level sensors (float ball switch, capacitive, pressure type, ultrasonic type, radar type, etc.), for example, the battery pack with liquid storage, liquid discharge and liquid level monitoring function disclosed in Chinese patent CN112140910A, which uses a liquid level sensor to monitor the liquid level in the battery pack in real time.

[0003] Based on the structure and characteristics of the existing immersion plug -in box, the liquid level is directly observed through the addition of a window, and due to the window position and size, the observation of the liquid level has certain limitations, and the liquid level is indirectly observed through various liquid level sensors. Due to the installation position, installation environment and use requirements of the existing liquid level sensor, it cannot meet the monitoring requirements of the liquid level in the plug -in box. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a liquid level monitoring device and immersion plug -in box of immersion plug -in box.

[0005] The technical scheme of the utility model is as follows: the utility model provides a liquid level monitoring device and immersion plug -in box of immersion plug -in box, which comprises a capacitive component vertically arranged on the inner side wall of the immersion plug -in box, a detection component arranged in the immersion plug -in box and electrically connected with the capacitive component, wherein the bottom end of the capacitive component is close to the bottom surface of the immersion plug -in box, the bottom of the capacitive component is open, and the liquid in the immersion plug -in box enters the capacitive component from the bottom opening of the capacitive component, the liquid level in the capacitive component is consistent with the liquid level in the immersion plug -in box, the detection component detects the capacitance of the capacitive component, and the liquid level change in the capacitive component is obtained by converting the capacitance change of the capacitive component.

[0006] On the basis of the above technical scheme, preferably, the capacitive component comprises an outer sleeve vertically arranged on the inner side wall of the immersion plug -in box, a first electrode vertically sleeved in the outer sleeve, a second electrode vertically sleeved in the outer sleeve and spaced apart from the first electrode, and an end cover covering the top end of the outer sleeve, wherein the top and bottom ends of the outer sleeve are through, the liquid in the immersion plug -in box enters the outer sleeve from the bottom end of the outer sleeve, and the top end of the first electrode and the second electrode is connected with the end cover.

[0007] Further preferably, the end cover is provided with an exhaust hole.

[0008] Further preferably, the first electrode is a vertical cylinder, and the first electrode is tightly sleeved in the outer sleeve; the second electrode is a vertical column, and the second electrode is arranged in the first electrode and spaced from the first electrode.

[0009] Further preferably, the radial section of the outer sleeve, the first electrode and the second electrode are circular.

[0010] Further preferably, a calculation formula of the capacitance of the capacitor assembly is C = 2πεh / √(R / r), wherein ε represents a dielectric constant of a liquid in the immersed plug-in box, h represents a liquid level height in the capacitor assembly, R represents an inner diameter of the first electrode, and r represents an outer diameter of the second electrode.

[0011] Further preferably, the first electrode and the second electrode are made of metal material, and the outer sleeve is made of insulating material.

[0012] On the basis of the above technical scheme, preferably, the detection assembly comprises a detector main body electrically connected with the capacitor assembly and detecting a capacitance change of the capacitor assembly, and a fixing member for mounting and fixing the detector main body at a middle portion of the capacitor assembly.

[0013] Further preferably, half holes are symmetrically formed on the detector main body and the fixing member, the capacitor assembly is sleeved in a hole formed by the two half holes, and the detector main body and the fixing member clamp the capacitor assembly.

[0014] On the other hand, the utility model also provides a kind of immersed plug-in box, and the liquid level monitoring device of the immersed plug-in box is detected in the immersed plug-in box using above-mentioned.

[0015] The liquid level monitoring device of the immersed plug-in box and the immersed plug-in box of the utility model have the following beneficial effects relative to prior art:

[0016] (1) the utility model forms capacitor sensor by inner and outer electrodes, and can accurately obtain the liquid level change in the capacitor by detecting the change of its capacitance, so as to obtain the liquid level change in the plug-in box, and the detection process is not affected by the pressure and liquid flow rate in the plug-in box.

[0017] (2) the utility model realizes the fixation of detection assembly by fixing member and detector main body clamping outer sleeve, avoids the problem of designing special position and support for fixing detection assembly in plug-in box, and improves the applicability and universality of the device. BRIEF DESCRIPTION OF DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the immersion-type insertion box of this utility model;

[0020] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a perspective view of the liquid level monitoring device of this utility model;

[0022] Figure 4 This is a three-dimensional exploded view of the liquid level monitoring device of this utility model;

[0023] Figure 5 This is a perspective view and a radial cross-sectional view of the capacitor assembly of this utility model;

[0024] Figure 6 This is a perspective view of the detection component of this utility model;

[0025] Figure 7 This is a schematic diagram illustrating the detection principle of the liquid level monitoring device of this utility model.

[0026] In the figure: 1. Capacitor assembly; 11. Outer casing; 12. First electrode; 13. Second electrode; 14. End cap; 2. Detection assembly; 21. Detector body; 22. Fixing component; 201. Half hole. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0028] like Figure 2 As shown, combined with Figure 3 and Figure 4 The present invention relates to a liquid level monitoring device for an immersion tank, comprising a capacitor assembly 1 and a detection assembly 2.

[0029] The capacitor assembly 1 is vertically mounted on the inner wall of the immersion tank. The bottom of the capacitor assembly 1 is open, allowing liquid from the immersion tank to enter through this opening. The liquid level inside the capacitor assembly 1 matches the liquid level inside the immersion tank. The capacitor assembly 1 is essentially a capacitive sensor. As the immersion liquid enters the capacitor assembly 1, its capacitance changes with the rise or fall of the liquid level. Since the capacitance of the capacitor assembly 1 is directly proportional to the liquid level, the liquid level can be calculated from the capacitance of the capacitor assembly 1. To ensure the liquid level of the capacitor assembly 1 is as close as possible to the liquid level inside the tank, the bottom of the capacitor assembly 1 needs to be close to the bottom surface of the immersion tank, thus ensuring the liquid level inside the capacitor assembly 1 matches the liquid level inside the tank.

[0030] The detection component 2 is housed within an immersion-type enclosure and electrically connected to the capacitor assembly 1. The detection component 2 detects the capacitance of the capacitor assembly 1 and calculates the change in liquid level within the capacitor assembly 1 based on the change in capacitance. The detection component 2 contains a waterproof, sealed space housing a miniature PCB board for receiving capacitance information from the capacitor assembly 1. This PCB board is connected to the capacitor assembly 1 via wires to transmit capacitance information. The detection component 2 also has a waterproof plug-in interface on its side, which connects to the energy storage system management system. The miniature PCB board transmits the capacitance information to the energy storage system management system, which processes the information to directly output the liquid level information.

[0031] exist Figure 3 In a preferred embodiment shown, the capacitor assembly 1 includes an outer casing 11, a first electrode 12, a second electrode 13, and an end cap 14.

[0032] The outer casing 11 is vertically mounted on the inner wall of the immersion chamber. The top and bottom ends of the outer casing 11 are open, allowing liquid from the immersion chamber to enter the outer casing 11 from its bottom end. The function of the outer casing 11 is to isolate the two electrodes located inside it from the internal environment of the chamber.

[0033] The first electrode 12 is vertically sleeved inside the outer casing 11.

[0034] The second electrode 13 is vertically sleeved inside the outer casing 11 and spaced apart from the first electrode 12.

[0035] End cap 14 is placed on the top of outer protective tube 11. End cap 14 can be fixed and secured to outer protective tube 11 by a snap-fit ​​structure. End cap 14 is electrically connected to detection component 2. The lower surface of end cap 14 protrudes into outer protective tube 11, so that end cap 14 is connected to the top of first electrode 12 and second electrode 13.

[0036] exist Figure 4In a preferred embodiment shown, the end cover 14 is provided with an exhaust hole, so that the internal pressure of the capacitor assembly 1 will not change due to the change of the liquid level, thereby avoiding the adverse effect of the change of the internal pressure of the capacitor assembly 1 on the liquid level detection.

[0037] In Figure 5 In a preferred embodiment shown, the first electrode 12 is a vertical cylinder, and the first electrode 12 is tightly sleeved in the outer sleeve 11; the second electrode 13 is a vertical column, and the second electrode 13 is arranged in the first electrode 12 and spaced from the first electrode 12. Since the working principle of the capacitive sensor is generally divided into three types of variable distance, variable area and variable medium, in the embodiment, the distance between the first electrode 12 and the second electrode 13 is constant, and the medium type of the immersed liquid is also fixed, so when the liquid level in the capacitor assembly 1 changes, the contact area of the immersed liquid with the electrode changes in essence, and thus the change of the capacitance of the capacitor assembly 1 indirectly reflects the change of the liquid level height.

[0038] In Figure 5 In a preferred embodiment shown, the radial sections of the outer sleeve 11, the first electrode 12 and the second electrode 13 are circular, which is convenient for calculating the capacitance change.

[0039] In Figure 7 In a preferred embodiment shown, the calculation formula of the capacitance of the capacitor assembly 1 is C=2πεh / √(R / r), wherein ε represents the dielectric constant of the liquid in the immersed plug-in box, h represents the liquid level height in the capacitor assembly 1, 2πh represents the contact area of the immersed liquid with the two electrodes, R represents the inner diameter of the first electrode 12, r represents the outer diameter of the second electrode 13, and √(R / r) represents the distance between the first electrode 12 and the second electrode 13. The real-time capacitance of the capacitor assembly 1 is detected by the detection assembly 2, and in the case that the parameters ε and √(R / r) are fixed, the value of the liquid level height h in the capacitor assembly 1 can be obtained by conversion.

[0040] In Figure 3 In a preferred embodiment shown, the first electrode 12 and the second electrode 13 are made of metal materials, specifically copper or tin, and the outer sleeve 11 is made of insulating materials, specifically rubber tube or plastic tube.

[0041] In Figure 6 In a preferred embodiment shown, the detection assembly 2 includes a detector main body 21 and a fixing member 22.

[0042] The detector main body 21 is electrically connected with the capacitor assembly 1 and detects the capacitance change of the capacitor assembly 1. The detector main body 21 comprises a waterproof closed shell, a PCB arranged in the shell, a conductive wire connecting the capacitor assembly 1 and the PCB, and a waterproof interface arranged on the side of the shell.

[0043] The fixing member 22 is used for mounting and fixing the detector main body 21 at the middle part of the capacitor assembly 1. The fixing member 22 is connected with the detector main body 21 through fastening bolts.

[0044] In Figure 6 In a preferred embodiment shown in the drawings, half holes 201 are symmetrically arranged on the detector main body 21 and the fixing member 22. The capacitor assembly 1 is sleeved in a hole formed by the two half holes 201, and the detector main body 21 and the fixing member 22 clamp the capacitor assembly 1.

[0045] As Figure 1 shown, in combination Figure 2 with the above-mentioned liquid level monitoring device of the immersed patch panel, the liquid level in the immersed patch panel is detected.

[0046] The above-mentioned is only a preferred embodiment of the utility model, and does not limit the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A liquid level monitoring device for an immersed patch panel, characterized by, include: The capacitor assembly (1) is vertically mounted on the inner wall of the immersion box; The detection component (2) is disposed in the immersion box and electrically connected to the capacitor assembly (1); Wherein, the bottom end of the capacitor assembly (1) is close to the bottom surface of the immersion box, the bottom of the capacitor assembly (1) is open and the liquid in the immersion box enters the capacitor assembly (1) from the bottom opening of the capacitor assembly (1), and the liquid level in the capacitor assembly (1) is the same as the liquid level in the immersion box. The detection component (2) detects the capacitance of the capacitor component (1); The change in liquid level inside the capacitor assembly (1) can be obtained by calculating the change in capacitance of the capacitor assembly (1).

2. The liquid level monitoring device of the submersible plug-in box according to claim 1, characterized in that: The capacitor assembly (1) includes, The outer protective sleeve (11) is vertically installed on the inner side wall of the submersible insertion box; The first electrode (12) is vertically sleeved inside the outer protective sleeve (11); The second electrode (13) is vertically sleeved inside the outer protective sleeve (11) and spaced apart from the first electrode (12); End cap (14) is placed on the top of the outer casing (11); The outer casing (11) is open at both the top and bottom, and the liquid in the immersion box enters the outer casing (11) from the bottom end; The end cap (14) is connected to the top of the first electrode (12) and the second electrode (13).

3. The liquid level monitoring device of the submersible plug-in box according to claim 2, characterized in that: The end cap (14) is provided with an exhaust hole.

4. The liquid level monitoring device of the submersible plug-in box according to claim 2, characterized in that: The first electrode (12) is a vertical cylindrical shape and is tightly fitted inside the outer protective sleeve (11); the second electrode (13) is a vertical column shape and is inserted inside the first electrode (12) with a gap between it and the first electrode (12).

5. The liquid level monitoring device of the submersible plug-in box according to claim 4, characterized in that: The radial cross-sections of the outer casing (11), the first electrode (12), and the second electrode (13) are all circular.

6. The liquid level monitoring device of the submersible plug-in box according to claim 5, characterized in that: The formula for calculating the capacitance of the capacitor assembly (1) is as follows: C = 2πεh / log(R / r), Wherein, ε represents the dielectric constant of the liquid in the immersion box, h represents the liquid level in the capacitor assembly (1), R represents the inner diameter of the first electrode (12), and r represents the outer diameter of the second electrode (13).

7. The liquid level monitoring device of the submersible plug-in box according to claim 2, characterized in that: The first electrode (12) and the second electrode (13) are made of metal materials, and the outer protective sleeve (11) is made of insulating material.

8. The liquid level monitoring device of the submersible plug-in box according to claim 1, characterized in that: The detection component (2) includes, The detector body (21) is electrically connected to the capacitor assembly (1) and detects the capacitance change of the capacitor assembly (1); A fastener (22) is used to mount and fix the detector body (21) to the middle of the capacitor assembly (1).

9. The liquid level monitoring device of the submersible plug-in box according to claim 8, characterized in that: The detector body (21) and the fixing member (22) are symmetrically provided with half holes (201), and the capacitor assembly (1) is sleeved in the hole formed by the two half holes (201). The detector body (21) and the fixing member (22) clamp the capacitor assembly (1).

10. An immersion patch panel, characterized by: The liquid level monitoring device for an immersion tank as described in any one of claims 1 to 9 is used to detect the liquid level inside the immersion tank.

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