Packaging conduction structure of capacitive liquid level sensor

Abstract

The utility model relates to the technical field of capacitive liquid level sensors, and discloses a packaging conduction structure of a capacitive liquid level sensor, which comprises an outer shell, an upper half shell and a lower half shell, connecting cylinders are inserted into the tops of the positive connecting plates, and threaded ring blocks are in threaded connection with the upper portions of the surfaces of the connecting cylinders; a side abutting rod is additionally arranged in an inner cavity of the side square hole, a guide rod is inserted into the top of the connecting cylinder, the lower portions of the two sides of the guide rod are hinged to the side abutting rod, and the center of the bottom of the guide rod is designed to be in a convex shape and sleeved with a reset spring. According to the packaging conduction structure of the capacitive liquid level sensor, an upper half shell is connected with a lower half shell, a threaded ring block is rotated to descend and is attached to the top of a positive connecting plate, a side abutting rod extends out of a side square hole and is attached to the bottom of the positive connecting plate, and during separation, a guide rod can be pressed downwards, so that the side abutting rod retracts inwards and is separated from the bottom of the positive connecting plate. By adopting the mode, the disassembly operation can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitive liquid level sensors, in particular to a packaging conduction structure of a capacitive liquid level sensor. Background Art

[0002] The capacitive liquid level sensor is a device that detects the liquid level based on the principle of capacitance change. The capacitance can be changed by sensing the change of the measured medium surface. It uses two inner and outer tubes as the plates of the capacitor, and a certain gap needs to be maintained. When the position of the fuel liquid level changes, the gap will also change, thereby changing the capacitance value of the capacitor. By measuring the change of this capacitance value, the height of the liquid level can be accurately determined. The capacitive liquid level sensor is a liquid level detector with high precision, high stability and long service life. The capacitive liquid level sensor itself contains a packaged conductive structure.

[0003] The package conduction structure of common capacitive liquid level sensors is usually composed of electrodes, insulating media, lead wires and shells. Among them: the electrodes are used to detect liquid level changes; the insulating media is used to isolate the electrodes and liquids to prevent the electrodes from directly contacting the liquids and causing short circuits; the lead wires are used to connect the electrodes and the measuring circuits to transmit signals; the shell is used to protect the internal components to prevent liquid leakage and interference from the external environment.

[0004] The packaged conductive structure of the traditional capacitive liquid level sensor is usually welded, and after long-term use, the metal parts such as electrodes and lead wires will age due to long-term use, resulting in performance degradation or failure, and the welded shell is not convenient to open and replace the internal metal parts. The packaged conductive structure of some capacitive liquid level sensors connects the shell with bolts, which makes it easy to disassemble and repair the internal metal parts. However, since capacitive liquid level sensors are often used in liquid containers, they are limited by the size of the container or the opening size. It is very inconvenient to use tools to disassemble and repair the metal parts inside the packaged conductive structure. In addition, since the capacitive liquid level sensor has high requirements for detection sensitivity, it has higher requirements for the connection stability of the packaged conductive structure. Therefore, a packaged conductive structure of a capacitive liquid level sensor is proposed. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a packaging conductive structure of a capacitive liquid level sensor to solve the above-mentioned inconvenience when using tools to disassemble and repair metal parts inside the packaging conductive structure. In addition, since the capacitive liquid level sensor has high requirements on detection sensitivity, the connection stability of the packaging conductive structure is required to be even higher. Therefore, a technical problem of a packaging conductive structure of a capacitive liquid level sensor is proposed.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a packaging conduction structure of a capacitive liquid level sensor, comprising:

[0009] An outer shell, and a lead wire arranged at the center of one side of the outer shell, wherein the outer shell as a whole is composed of an upper half shell and a lower half shell;

[0010] The positive connecting plate is arranged at the corresponding positions of the front and back surfaces of the upper half shell and the lower half shell, and a connecting tube is inserted at the top of each positive connecting plate, and a threaded ring block is threadedly connected to the upper surface of the connecting tube;

[0011] The side holes are arranged at the lower center parts of both sides of the connecting tube, and the inner cavity of the side holes is provided with side push rods, the top of the connecting tube is inserted with guide rods, and the guide rods are hinged between the lower parts of both sides and the side push rods, the bottom center of the guide rods is convex in design, and is sleeved with a reset spring, and the bottom of the inner cavity of the connecting tube is concave in design, and corresponds to the bottom of the guide rods. By connecting the upper half shell with the lower half shell, the corresponding positive connecting plates are fitted, and the connecting tube is inserted, the rotatable threaded ring block descends along the surface of the connecting tube, and fits tightly with the top of the positive connecting plate, and the guide rod, under the action of the reset spring, makes the side push rod extend outward from the side hole, and fits tightly with the bottom of the positive connecting plate, when the positive connecting plate is separated from the connecting tube, the guide rod is pressed down, and fits with the bottom of the inner cavity of the connecting tube, so that the side push rod retracts inward from the side hole. On the one hand, it facilitates the disassembly operation between the connecting plate and the connecting tube, reducing the time for maintenance and replacement of parts; on the other hand, the stability of the connection between the upper shell and the lower shell is ensured by the threaded ring block and the side support rod.

[0012] Preferably, an insulating inner shell is installed transversely at the center of the inner cavity of the outer shell, and an electrode is transversely provided at the center of the inner cavity of the insulating inner shell and connected to the lead wire. The insulating inner shell can provide protection for the electrode, and the electrode can be used to detect liquid level changes and is used in conjunction with the lead wire.

[0013] Preferably, the front and rear ends of both sides of the upper and lower shells are equipped with side connecting plates, and the top centers of the side connecting plates are provided with positioning circular holes, and the inner walls of the positioning circular holes are provided with side grooves. The upper and lower shells can be connected to corresponding structures through the corresponding side connecting plates, positioning circular holes and side grooves.

[0014] Preferably, fixed top plates are installed at the corresponding positions of the front and rear ends of both sides of the upper and lower shells, and the fixed top plates correspond to the side connecting plates. Sealing convex plates are installed around the bottom of the upper shell, and sealing grooves are opened around the top of the lower shell and correspond to the sealing convex plates. When the upper and lower shells are fitted and connected, the sealing convex plates of the upper shell are inserted into the sealing grooves of the lower shell, thereby ensuring the sealing of the connection between the upper and lower shells.

[0015] Preferably, a guide column is fixedly installed at the top center of the fixed top plate, and an extrusion spring is sleeved on the outer surface of the guide column and fits tightly with the corresponding part of the bottom of the fixed top plate. The extrusion spring can drive the corresponding structure on the outer surface of the guide column to move.

[0016] Preferably, the lower part of the outer surface of the guide column is sleeved with a bottom connecting plate, which is tightly fitted with the corresponding part of the extrusion spring, and the outer side of the bottom of the bottom connecting plate is evenly installed with side convex plates, which correspond to the side grooves. The extrusion spring drives the bottom connecting plate to descend on the outer surface of the guide column, and the side convex plates are inserted into the corresponding side grooves for connection. On the one hand, the two sides of the upper half shell and the lower half shell are connected to ensure the stability of the connection between the upper half shell and the lower half shell; on the other hand, it not only plays a positioning role to avoid the phenomenon of dislocation of the connection between the upper half shell and the lower half shell, but also facilitates the disassembly and assembly operations.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a packaging conduction structure of a capacitive liquid level sensor, which has the following beneficial effects:

[0019] The packaged conductive structure of the capacitive liquid level sensor is formed by connecting the upper half shell with the lower half shell, fitting the corresponding positive connecting plates, inserting a connecting tube, and rotating the threaded ring block to descend along the surface of the connecting tube and fit tightly with the top of the positive connecting plate. Under the action of the reset spring, the guide rod makes the side support rod extend outward from the side hole and fit tightly with the bottom of the positive connecting plate. When the positive connecting plate is separated from the connecting tube, the guide rod is pressed down and fits with the bottom of the inner cavity of the connecting tube, so that the side support rod retracts inward from the side hole. In this way, on the one hand, the positive connecting plate and the connecting tube can be disassembled and assembled without the use of tools, which reduces the maintenance difficulty of the packaged conductive structure of the capacitive liquid level sensor in a small space, and the disassembly and maintenance are more convenient; on the other hand, the threaded ring block and the side support rod ensure the stability of the connection between the upper half shell and the lower half shell, and improve the detection sensitivity of the capacitive liquid level sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the separation structure of the upper half shell and the lower half shell of the utility model;

[0022] Figure 3 This is a schematic diagram of the separation structure of the side connecting plate and the side convex plate of the utility model;

[0023] Figure 4 It is a partial cross-sectional structural schematic diagram of the positive connecting plate and the connecting tube of the utility model.

[0024] In the figure: 1. outer shell; 2. upper half shell; 3. lower half shell; 4. lead wire; 5. insulating inner shell; 6. electrode; 7. positive connecting plate; 8. connecting tube; 9. threaded ring block; 10. side hole; 11. side support rod; 12. guide rod; 13. reset spring; 14. side connecting plate; 15. positioning circular hole; 16. side groove; 17. fixed top plate; 18. guide column; 19. extrusion spring; 20. bottom connecting plate; 21. side convex plate; 22. sealing convex plate; 23. sealing groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a technical solution, a packaging conduction structure of a capacitive liquid level sensor, including: Figure 1 , Figure 2 , an outer shell 1, and a lead wire 4 arranged at the center of one side of the outer shell 1, and the outer shell 1 as a whole is composed of an upper half shell 2 and a lower half shell 3;

[0027] See also Figure 4 The positive connecting plate 7 is arranged at the corresponding positions of the front and back surfaces of the upper half shell 2 and the lower half shell 3, and a connecting tube 8 is inserted at the top of the positive connecting plate 7, and a threaded ring block 9 is threadedly connected to the upper surface of the connecting tube 8;

[0028] The side holes 10 are arranged at the lower center parts of both sides of the connecting tube 8, and the inner cavity of the side holes 10 is provided with side support rods 11, and the top of the connecting tube 8 is inserted with a guide rod 12, and the guide rod 12 is hinged between the lower parts of both sides and the side support rods 11, the bottom center of the guide rod 12 is convex in design, and is sleeved with a reset spring 13, and the bottom of the inner cavity of the connecting tube 8 is concave in design, and corresponds to the bottom of the guide rod 12. By connecting the upper half shell 2 and the lower half shell 3, the corresponding positive connecting plates 7 are fitted together, and the connecting tube 8 is inserted, the threaded ring block 9 can be rotated to descend along the surface of the connecting tube 8 and fit tightly with the top of the positive connecting plate 7. Under the action of the return spring 13, the guide rod 12 makes the side support rod 11 extend outward from the side hole 10 and fit tightly with the bottom of the positive connecting plate 7. When the positive connecting plate 7 is separated from the connecting tube 8, the guide rod 12 is pressed down and fits with the bottom of the inner cavity of the connecting tube 8, so that the side support rod 11 retracts inward from the side hole 10. On the one hand, it makes it easy to disassemble the positive connecting plate 7 and the connecting tube 8, reducing the time for maintenance and replacement of parts; on the other hand, the threaded ring block 9 and the side support rod 11 ensure the stability of the connection between the upper half shell 2 and the lower half shell 3.

[0029] See also Figure 2 The insulating inner shell 5 is installed transversely at the center of the inner cavity of the outer shell 1, and the electrode 6 is transversely provided at the center of the inner cavity of the insulating inner shell 5 and connected to the lead wire 4. The insulating inner shell 5 can provide protection for the electrode 6, and the electrode 6 can be used to detect the change of the liquid level and is used in conjunction with the lead wire 4.

[0030] See also Figure 3, side connecting plates 14 are installed at the front and rear ends of both sides of the upper half shell 2 and the lower half shell 3, and a positioning circular hole 15 is opened at the top center of the side connecting plates 14, and a side groove 16 is opened on the inner wall of the positioning circular hole 15. The upper half shell 2 and the lower half shell 3 can be connected to the corresponding structure through the corresponding side connecting plates 14, the positioning circular hole 15 and the side groove 16. Fixed top plates 17 are installed at the corresponding positions of the front and rear ends of both sides of the upper half shell 2 and the lower half shell 3, and the fixed top plates 17 correspond to the side connecting plates 14. A sealing convex plate 22 is installed around the bottom of the upper half shell 2, and a sealing groove 23 is opened around the top of the lower half shell 3 and corresponds to the sealing convex plate 22. When the upper half shell 2 and the lower half shell 3 are fitted and connected, the sealing convex plate 22 of the upper half shell 2 is inserted into the sealing groove 23 of the lower half shell 3, thereby ensuring the sealing of the connection between the upper half shell 2 and the lower half shell 3. A guide column 18 is fixedly installed at the top center of the fixed top plate 17, and a compression spring 19 is sleeved on the outer surface of the guide column 18, and is tightly fitted with the corresponding part of the bottom of the fixed top plate 17. The compression spring 19 can drive the corresponding structure to move on the outer surface of the guide column 18. A bottom connecting plate 20 is sleeved on the lower part of the outer surface of the guide column 18, and is tightly fitted with the corresponding part of the compression spring 19, and a side convex plate 21 is evenly installed on the outer side of the bottom of the bottom connecting plate 20, and corresponds to the side groove 16. The compression spring 19 drives the bottom connecting plate 20 to descend on the outer surface of the guide column 18, and the side convex plate 21 is inserted into the inside of the corresponding side groove 16 for connection. On the one hand, the two sides of the upper half shell 2 and the lower half shell 3 are connected to ensure the stability of the connection between the upper half shell 2 and the lower half shell 3; on the other hand, it not only plays a positioning role to avoid the phenomenon of dislocation of the connection between the upper half shell 2 and the lower half shell 3, but also facilitates the disassembly and assembly operation.

[0031] This solution: by connecting the upper half shell 2 with the lower half shell 3, the corresponding positive connecting plates 7 are fitted, and the connecting tube 8 is inserted, the rotatable threaded ring block 9 descends along the surface of the connecting tube 8 and fits tightly with the top of the positive connecting plate 7, and the guide rod 12, under the action of the return spring 13, makes the side support rod 11 extend outward from the side hole 10 and fits tightly with the bottom of the positive connecting plate 7. When the positive connecting plate 7 is separated from the connecting tube 8, the guide rod 12 is pressed down and fits with the bottom of the inner cavity of the connecting tube 8, so that the side support rod 11 retracts inward from the side hole 10. When the upper half shell 2 and the lower half shell 3 are fitted and connected, the sealing convex plate 22 of the upper half shell 2 is inserted into the sealing groove 23 of the lower half shell 3, and the extrusion spring 19 drives the bottom connecting plate 20 to descend on the outer surface of the guide column 18, and makes the side convex plate 21 inserted into the corresponding side groove 16 for connection.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A packaging conductive structure of a capacitive liquid level sensor, characterized in that: include: An outer shell (1), and a lead wire (4) arranged at the center of one side of the outer shell (1), and the outer shell (1) as a whole is composed of an upper half shell (2) and a lower half shell (3); A positive connecting plate (7) is arranged at the corresponding positions of the front and back sides of the upper half shell (2) and the lower half shell (3), and a connecting tube (8) is inserted at the top of each positive connecting plate (7), and a threaded ring block (9) is threadedly connected to the upper surface of the connecting tube (8); The side holes (10) are arranged at the lower center parts of both sides of the connecting tube (8), and the inner cavity of the side holes (10) is provided with side support rods (11). A guide rod (12) is inserted at the top of the connecting tube (8), and the guide rod (12) is hinged between the lower parts of both sides and the side support rods (11). The bottom center of the guide rod (12) is convex in design and is sleeved with a return spring (13). The bottom of the inner cavity of the connecting tube (8) is concave in design and corresponds to the bottom of the guide rod (12).

2. The packaging conductive structure of a capacitive liquid level sensor according to claim 1, characterized in that: An insulating inner shell (5) is transversely mounted at the center of the inner cavity of the outer shell (1), and an electrode (6) is transversely added at the center of the inner cavity of the insulating inner shell (5) and is connected to the lead wire (4).

3. The packaging conductive structure of a capacitive liquid level sensor according to claim 1, characterized in that: Side connecting plates (14) are installed at the front and rear ends of both sides of the upper half shell (2) and the lower half shell (3), and a positioning circular hole (15) is opened at the top center of the side connecting plate (14), and a side groove (16) is opened on the inner wall of the positioning circular hole (15).

4. The packaging conductive structure of a capacitive liquid level sensor according to claim 3, characterized in that: Fixed top plates (17) are installed at the corresponding positions of the front and rear ends of both sides of the upper half shell (2) and the lower half shell (3), and the fixed top plates (17) correspond to the side connecting plates (14). A sealing convex plate (22) is installed around the bottom of the upper half shell (2), and a sealing groove (23) is opened around the top of the lower half shell (3) and corresponds to the sealing convex plate (22).

5. The packaging conductive structure of a capacitive liquid level sensor according to claim 4, characterized in that: A guide column (18) is fixedly mounted at the top center of the fixed top plate (17), and an extrusion spring (19) is sleeved on the outer surface of the guide column (18) and is tightly fitted with a corresponding portion of the bottom of the fixed top plate (17).

6. The packaging conductive structure of a capacitive liquid level sensor according to claim 5, characterized in that: The lower part of the outer surface of the guide column (18) is sleeved with a bottom connecting plate (20) and is tightly fitted with the corresponding part of the extrusion spring (19), and the outer side of the bottom of the bottom connecting plate (20) is evenly installed with side convex plates (21) corresponding to the side grooves (16).

Images