CN201449281U

CN201449281U - Water level sensor

Info

Publication number: CN201449281U
Application number: CN2009200468590U
Authority: CN
Inventors: 戚元平
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-29
Filing date: 2009-06-29
Publication date: 2010-05-05
Anticipated expiration: 2019-06-29

Abstract

The utility model discloses a sensor, in particular to a water level sensor, which comprises a sensing head and a plug-in connector, wherein the sensing head is connected with the plug-in connector by a lead wire, the sensing head comprises an internal work part and a magnetism-resistant cover packed at the outer part of a work part, an upper silicon rubber case and a lower upper silicon rubber case are arranged between the magnetism-resistant cover and the work part, the upper silicon rubber case and the lower silicon rubber case are respectively sleeved at the upper part and the lower part of the work part, an external seal part connected with the upper silicon rubber case is arranged above the upper silicon rubber case, and the end part of the magnetism-resistant cover is inserted into the inner part of the external seal part. The sensor prevents from high-temperature damage, and is convenient in managing output signals.

Description

Level sensor

Technical field

The utility model relates to a kind of pick-up unit, is specifically related to a kind of level sensor.

Background technology

In the prior art, for solving the problem of measuring water level in the water, most of producers adopt the electrode point type, but level electrode, the sealing problem of signal wire is perplexing numerous sensor researchers always, again because the breathing capillarity of signal wire, make signal wire by vapour corrosion, resistance increases even corrosion break signal line, directly cause control assembly malfunctioning, China's water quality differs in addition, and the quality problem in a lot of areas is very serious, and incrustation scale brings a lot of troubles to sensor, incrustation scale is attached on the electrode, cause the sensor senses water level inaccurate, thus the waterproof antiscale measure of level electrode just should note emphatically, as the level sensor that contacts with water, general disposal route is to overlap live electrode with silicone tube, fluid sealant such as filling silica gel prevents that into water corrodes again, prevents incrustation scale by silica gel sensor or processing of circuit, but because the problem of aging of silicone tube and filling gel, therefore the validity problem of circuit can not solve the waterproof antiscale problem of level sensor at all.

Summary of the invention

The purpose of this utility model is to overcome the defective that above-mentioned prior art exists, and the level sensor that a kind of water proofing property is good, simple in structure, production cost is low, safety coefficient is high is provided.

The technical scheme that realizes the utility model purpose is as follows:

Level sensor, comprise sensing head and plug assembly, sensing head is connected with plug assembly by lead, sensing head comprises inner service part, and be wrapped in the magnetism shielding hood of service part outside, and being provided with silica gel sheath and silica gel sheath down between described magnetism shielding hood and the service part, last silica gel sheath and time silica gel sheath are enclosed within the upper and lower of service part respectively, last silica gel sheath top is provided with connected external seal parts, and the inside of external seal parts is inserted in the end of magnetism shielding hood.

The beneficial effects of the utility model are, compare with prior art, and level sensor of the present utility model has excellent waterproofness, shock resistance, thereby have avoided because working sensor is malfunctioning.In addition, the utility model is reasonable in design, and is simple in structure, is easy to processing, characteristics such as volume is little, error is little, coefficient height easy to use, safe, thoroughly avoided bringing level sensor water inlet and incrustation scale to adhere to, thereby caused testing the true problem of being not difficult because of the erosion of surrounding medium.Therefore, have good value for applications.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

In the accompanying drawing, 1 is plug assembly, and 2 is lead, and 3 is magnetism shielding hood, and 4 is skeleton, and 5 is magnet steel, and 6 is iron core, and 7 is enameled wire, and 8 is lug plate, and 9 is last silica gel sheath, and 10 are following silica gel sheath, and 11 is the external seal parts.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

With reference to Fig. 1, level sensor of the present utility model, comprise sensing head and plug assembly 1, sensing head is connected with plug assembly 1 by lead 2. and sensing head comprises inner service part, and the magnetism shielding hood 3. that is wrapped in the service part outside wherein, service part comprises the skeleton 4 of being located at magnetism shielding hood 3 inside center places, be vertical at the magnet steel 5 and the iron core 6 of skeleton inside, be located at the enameled wire 7 of skeleton 4 outside belows, and be located between lug plate 8. magnetism shielding hoods 3 at skeleton middle part and the service part and be provided with silica gel sheath 9 and time silica gel sheath 10, last silica gel sheath 9 and following silica gel sheath 10 are enclosed within the upper and lower of service part respectively, last silica gel sheath 9 tops are provided with connected external seal parts 11, these external seal parts adopt silica gel to make, and the inside of external seal parts is inserted in the end of magnetism shielding hood 3.

Claims

1. level sensor, comprise sensing head and plug assembly, sensing head is connected with plug assembly by lead, sensing head comprises inner service part, and be wrapped in the magnetism shielding hood of service part outside, it is characterized in that: be provided with silica gel sheath and following silica gel sheath between described magnetism shielding hood and the service part, last silica gel sheath and following silica gel sheath are enclosed within the upper and lower of service part respectively, last silica gel sheath top is provided with connected external seal parts, and the inside of external seal parts is inserted in the end of magnetism shielding hood.

2. level sensor according to claim 1, it is characterized in that: described service part comprises the skeleton of being located at magnetism shielding hood inside center place, be vertical at the magnet steel and the iron core of skeleton inside, be located at the enameled wire of below, skeleton outside, and be located at the lug plate at skeleton middle part.