Buried anti-compression anti-seepage anti-dragging copper/copper sulfate reference electrode with long service life

Abstract

The invention relates to a buried anti-compression anti-seepage anti-dragging copper / copper sulfate reference electrode with long service life. The reference electrode is characterized by comprising an upper cover of a seal box, a wiring-sealing stuffing box, a wiring copper rod, an outer sheath, an inner sheath and a ceramic tank, wherein the inner sheath is located in the outer sheath and coaxially arranged with the outer sheath; one end of the inner sheath is reducing in diameter; the tank is inlaid in the periphery of a diameter-reducing part of the inner sheath; and the bottom of the ceramic tank is exposed in an outer environmental medium. The reference electrode has the advantages that 1, the compression resistance of the reference electrode can be substantially improved through designing of a composite anti-compression structure (composed of the outer sheath, the inner sheath and the ceramic tank); and 2, the long-term stability, accuracy and the like of the reference electrode are improved.

Description

technical field [0001] The invention relates to the technical field of reference electrodes, in particular to a long-life copper / copper sulfate reference electrode which is suitable for use in soil media and has the properties of pressure resistance, seepage resistance and drag resistance. Background technique [0002] Existing long-life copper / copper sulfate reference electrode technologies, such as patents "Long-life Buried Copper, Copper Sulfate Reference Electrode CN91229173", "Long-Life Copper Sulfate Reference Electrode CN 201120151510", "Copper / saturated copper sulfate gel Glue Reference Electrode CN200610068457", its product structure is mainly made of ceramic tank, spiral copper wire, copper sulfate crystal or copper sulfate gel and external filler made of ceramic semipermeable membrane material, and its structure has the following deficiencies: 1. The main pressure-bearing structure of the structure is a single ceramic tank body, which is highly brittle and bears p...

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Problems solved by technology

[0002] Existing long-life copper / copper sulfate reference electrode technologies, such as patents "Long-life Buried Copper, Copper Sulfate Reference Electrode CN91229173", "Long-Life Copper Sulfate Reference Electrode CN 201120151510", "Copper / saturated copper sulfate gel Glue Reference Electrode CN200610068457", its product structure is mainly made of ceramic tank, spiral copper wire, copper sulfate crystal or copper sulfate gel and external filler made of ceramic semipermeable membrane material, and its structure has the following deficiencies: 1. The main pressure-bearing structure of the structure is a single ceramic tank body, which is highly brittle and bears poor pressure. When used in an actual construction site, activities such as soil compaction and construction excavation during construction can easily damage the structure of the reference electrode, resulting in a The failure of the electrode will cause losses to the operation of cathodic protection projects and other projects; 2. Most of the existing reference electrodes adopt a single-cavity structure, that is, the connection joint between the test cable and the reference electrode copper wire is not isolated from the copper test body. The body is directly in contact with groundwater or moisture, and the moisture is easy to penetrate into the joint between the test cable and the copper test body along the outer wall of the copper wire, resulting in water seepage and short circuit at the joint, resulting in distortion of the reference electrode test potential; and the insulation protection of the joint is simple, and the external environment moisture is easy Penetration into the joint, resulting in corrosion or even fracture of the joint, resulting in failure of the reference electrode; 3. The connection between the test cable and the reference electrode is simple, and bolts are often used to connect the copper core of the cable to the reference electrode copper wire, and no anti-drag device is installed , the connection strength is low. When used in the actual construction site, activities such as dragging of the reference electrode cable during construction, and settlement and movement of the reference electrode body during long-term use can easily damage the reference electrode and the cable joint, resulting in failure of the reference electrode; 4 , The ceramic semipermeable membrane of the reference electrode covers most of the electrode body, and the internal copper sulfate ion permeates and loses quickly, resulting in a decrease in the life of the reference electrode

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