Polyurea anti-corrosion and anti-explosion magnetic flux sensor and manufacturing method thereof

Abstract

The invention provides a polyurea anti-corrosion and anti-explosion magnetic flux sensor, comprising a bobbin, a coil twined at the outside of the bobbin, an outer sleeve, a data line connected to thecoil by passing through an outgoing line baffle, wherein a gap between the coil and the outer sleeve is filled with epoxy resin, a bonding layer is respectively coated on the outer surfaces of the bobbin and the outer sleeve, a polyurea layer is coated at the outside of the bonding layer, a bonding layer is also coated on the outer surface at the outlet of the data line, and a polyurea layer is coated at the outside of the bonding layer. The material constituting the polyurea layer is a polyurea material having a thickness of 500 to 2000 mu m; and the material constituting the bonding layer is an adhesive or coating having bonding power with the data line, the bobbin and the polyurea layer and having a thickness is 20 to 60 mu m. The polyurea anti-corrosion and anti-explosion magnetic flux sensor has a novel polyurea anti-corrosion system, which can greatly improve the overall anti-corrosion performance and anti-explosion performance of the magnetic flux sensor, prolong the service life thereof, and expand the application environment range of the magnetic flux sensor, and the manufacturing method of the magnetic flux sensor is simple.

Description

technical field [0001] The invention relates to a bridge cable force detection and monitoring device in the field of civil engineering monitoring, in particular to a polyurea anti-corrosion and anti-explosion magnetic flux sensor and a manufacturing method thereof. Background technique [0002] Magnetic flux sensors are widely used in the stress measurement of cables and prestressed tendons to protect the safe operation of bridges. The designed service life of cables is required to be no less than 30 years, and magnetic flux sensors are usually damaged in advance due to device corrosion. The post-operation and maintenance of the system has brought huge challenges; at present, the magnetic flux sensor is generally protected by chrome plating and epoxy glue perfusion. Due to the poor adhesion between the epoxy glue and the protective sleeve of the data line, gaps are likely to occur and cannot be used. Expected sealing effect; the sensor is working in a complex engineering env...

AI Technical Summary

Problems solved by technology

[0002] Magnetic flux sensors are widely used in the stress measurement of cables and prestressed tendons to protect the safe operation of bridges. The designed service life of cables is required to be no less than 30 years, and magnetic flux sensors are usually damaged in advance due to device corrosion. The post-operation and maintenance of the system has brought huge challenges; at present, the magnetic flux sensor is generally protected by chrome plating and epoxy glue perfusion. Due to the poor adhesion between the epoxy glue and the protective sleeve of the data line, gaps are likely to occur and cannot be used. Expected sealing effect; the sensor is working in a complex engineering environment, and these anti-corrosion materials are also prone to damp heat aging and fragmentation; in addition, the magnetic flux sensor has to go through several processes from production to installation, and the bumping of the sensor cannot be avoided. Scratching of the chrome plating layer occurs from time to time, and it is difficult to ensure the integrity of the anti-corrosion layer; once the anti-corrosion material is damaged, the anti-corrosion system will fail, and the moisture in the environment will enter the sensor, destroying the device and shortening the use of the sensor. life

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