CN215448109U

CN215448109U - Sealing device for liquid level height measuring sensor

Info

Publication number: CN215448109U
Application number: CN202121896411.5U
Authority: CN
Inventors: 王功炉
Original assignee: Individual
Current assignee: Shenzhen Yousen Information Technology Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-01-07
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a sealing device for a liquid level height measuring sensor, which belongs to the technical field of liquid level sensors and comprises a fixed cap and a single-head sealing pipe, the upper end of the single-head sealing tube is inserted in the inner cavity of the fixing cap, the lower end of the single-head sealing tube is screwed with a metal piece, a sealing gasket is arranged between the metal piece and the single-head sealing tube, the upper end of the metal piece is connected with a negative signal wire which penetrates through the single-head sealing tube, the device takes liquid at the lower end of the metal piece as the negative electrode of the capacitance acquisition closed loop, then a capacitance value is formed between the metal piece and the negative electrode of the capacitance acquisition closed loop, and then a capacitance value is generated between the metal capacitance electrode and the metal piece, so that the liquid level height is led out, because the negative pole of the closed loop is not on the sensor, the liquid to be measured can be effectively prevented from entering the inner side of the sensor along the gap between the negative pole of the closed loop and the sensor.

Description

Sealing device for liquid level height measuring sensor

Technical Field

The utility model relates to the technical field of liquid level sensors, in particular to a sealing device for a liquid level height measuring sensor.

Background

At present, when the liquid level height of conductive liquid in a non-static state such as pesticide liquid level in an unmanned aerial vehicle, water level height in a vehicle and the like is detected in real time, an immersion type capacitance type liquid level height detection sensor is generally adopted, a capacitance detection mode is adopted, capacitance is formed between a negative electrode of a closed loop and a negative electrode of the sensor through capacitance collection, serial port, voltage or current signals are output, and then the liquid level height is obtained through accurate temperature compensation and linear correction.

Can be provided with the negative pole that closed loop was gathered to electric capacity on the current immersion type capacitanc liquid level height detection sensor, and be difficult to form effective seal between the negative pole that closed loop was gathered to electric capacity and the sensor, this leads to being detected liquid and can getting into the inboard of sensor along the gap between negative pole that closed loop was gathered to electric capacity and the sensor, is detected liquid and can lead to sensor inner circuit short circuit, and then influences the normal work of sensor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sealing device for a liquid level height measuring sensor, which solves the problem of poor sealing performance of the existing immersion type capacitance liquid level height detecting sensor in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a sealing device for liquid level height measurement sensor, includes locking cap and single-end sealed tube, peg graft in the inner chamber of locking cap the upper end of single-end sealed tube, the lower extreme spiro union of single-end sealed tube has the metalwork, be provided with sealed the pad between metalwork and the single-end sealed tube, the upper end of metalwork is connected with the negative pole signal line that runs through the single-end sealed tube, be provided with metal capacitance pole in the inner chamber of single-end sealed tube.

Preferably, the single-end sealing tube is made of polytetrafluoroethylene.

Preferably, the outer side of the metal piece is connected with a plastic piece in a threaded mode, and the outer side of the plastic piece is connected with the single-end sealing pipe in a threaded mode.

Preferably, the metal capacitor pole is screwed with a plastic screw on the outer side of the upper end, the outer side of the plastic screw is screwed with the fixing cap, a sealing ring is arranged between the single-end sealing tube and the fixing cap, and the sealing ring is located on the lower side of the plastic screw.

Preferably, the fixing cap is provided in a hexagonal shape.

Compared with the prior art, the utility model has the beneficial effects that:

this device gathers closed-loop negative pole with the liquid of metalwork lower extreme as the electric capacity, then with metalwork and electric capacity formation capacitance value between gathering the closed-loop negative pole, utilize afterwards to produce electric capacity numerical value between metal capacitance utmost point and the metalwork, thereby derive the liquid level height, because the closed-loop negative pole is gathered to the electric capacity not on the sensor, can effectively avoid being surveyed the liquid along the inboard that the gap got into the sensor between electric capacity gathering closed-loop negative pole and the sensor.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic sectional structure view of the front view of the present invention.

In the figure: the device comprises a metal piece 1, a sealing gasket 2, a single-head sealing tube 3, a plastic piece 4, a metal capacitor 5, a sealing ring 6, a fixing cap 7, a plastic screw 8 and a negative signal line 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-2, the present invention provides a technical solution: a sealing device for a liquid level height measuring sensor comprises a fixing cap 7 and a single-head sealing tube 3, wherein the upper end of the single-head sealing tube 3 is inserted into an inner cavity of the fixing cap 7, the lower end of the single-head sealing tube 3 is screwed with a metal piece 1, the metal piece 1 is arranged in a T shape, the outer side of the upper end of the metal piece 1 is provided with threads, the sealing end of the single-head sealing tube 3 is provided with a threaded hole, a sealing gasket 2 is arranged between the metal piece 1 and the single-head sealing tube 3, the liquid to be measured is prevented from permeating into the inner cavity of the single-head sealing tube 3 from a gap between the metal piece 1 and the single-head sealing tube 3 through the sealing gasket 2, the upper end of the metal piece 1 is connected with a negative electrode signal line 9 penetrating through the single-head sealing tube 3, a metal capacitor electrode 5 is arranged in the inner cavity of the single-head sealing tube 3, when the device is used, the part, which is positioned below the lower end of the fixing cap 7, is soaked into the liquid to be measured, this liquid is the conducting medium, and this device is direct to measure the negative pole that measures liquid as the electric capacity collection closed loop with metalwork 1 lower extreme, and the electric capacity is gathered closed loop's negative pole and is formed the capacitance value between the metalwork 1 as the sensor negative pole, then with the metal capacitance pole 5 of single-end sealed tube 3 parcel can and metalwork 1 between produce the capacitance value change, compensate, revise the capacitance value of change, can form the height value of liquid level, then detect output signal to the height measurement of current real-time liquid level.

The single-end sealing tube 3 is made of polytetrafluoroethylene which is an artificially synthesized high polymer material, has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, and is almost insoluble in all solvents, so that the single-end sealing tube 3 made of the polytetrafluoroethylene can effectively avoid the corrosion of the tested liquid to the single-end sealing tube 3.

The outside spiro union of metalwork 1 has plastic part 4, and the inside and outside of plastic part 4 all is provided with the screw thread, and the outside and the 3 spiro unions of single-end sealed tube of plastic part 4 carry out the switching through plastic part 4, can form an effectual sealing member, and then further prevent that the gap that is surveyed liquid between through single-end sealed tube 3 and metalwork 1 from permeating inside the sensor.

The outer side spiro union of the upper end of metal capacitor utmost point 5 has plastic screw 8, and the outside and the fixed cap 7 spiro union of plastic screw 8 all are provided with the screw thread in the interior side survey of plastic screw 8, are provided with sealing washer 6 between single-end sealed tube 3 and the fixed cap 7, and sealing washer 6 is located the downside of plastic screw 8, prevents to be surveyed the liquid and permeates to fixed cap 7 from the gap between single-end sealed tube 3 and the fixed cap 7.

The fixing cap 7 is provided in a hexagonal shape so that the fixing cap 7 can be easily screwed.

The working principle is as follows: during the use, the part that is located the below of locking cap 7 of this device soaks in the volume of awaiting measuring liquid, and the volume of awaiting measuring liquid of metalwork 1 lower extreme gathers closed loop as the negative pole of electric capacity, and electric capacity gathers and forms the capacitance value between the negative pole of closed loop and metalwork 1, then metal capacitance pole 5 will produce the change of capacitance value with metalwork 1 between, and then form the height value of liquid level, then detect output signal to the height measurement of current real-time liquid level.

While there have been shown and described the fundamental principles and essential features of the utility model and advantages thereof, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A sealing device for a liquid level height measuring sensor, comprising a fixing cap (7) and a single-ended sealing tube (3), characterized in that: the upper end of the single-head sealing tube (3) is inserted into an inner cavity of the fixing cap (7), the lower end of the single-head sealing tube (3) is connected with a metal piece (1) in a threaded mode, a sealing gasket (2) is arranged between the metal piece (1) and the single-head sealing tube (3), the upper end of the metal piece (1) is connected with a negative electrode signal line (9) penetrating through the single-head sealing tube (3), and a metal capacitor electrode (5) is arranged in the inner cavity of the single-head sealing tube (3).

2. A sealing device for a liquid level height measuring sensor according to claim 1, wherein: the single-end sealing pipe (3) is made of polytetrafluoroethylene.

3. A sealing device for a liquid level height measuring sensor according to claim 1, wherein: the outer side of the metal piece (1) is connected with a plastic piece (4) in a threaded mode, and the outer side of the plastic piece (4) is connected with the single-end sealing pipe (3) in a threaded mode.

4. A sealing device for a liquid level height measuring sensor according to claim 1, wherein: the metal capacitor electrode is characterized in that a plastic screw (8) is connected to the outer side of the upper end of the metal capacitor electrode (5) in a threaded mode, the outer side of the plastic screw (8) is connected with a fixing cap (7) in a threaded mode, a sealing ring (6) is arranged between the single-end sealing tube (3) and the fixing cap (7), and the sealing ring (6) is located on the lower side of the plastic screw (8).

5. A sealing device for a liquid level height measuring sensor according to claim 1, wherein: the fixing cap (7) is arranged in a hexagonal shape.