Production method of gas detection tube
A gas detection and production method technology, applied in the direction of chemical instruments and methods, layered products, tubular articles, etc., can solve the problems of high transportation cost, high density of stainless steel material, and many installation joints, and achieve convenient transportation, increased strength, The effect of prolonging the service life
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Embodiment 1
[0020] A production method of a gas detection tube, the gas detection tube comprises a support layer, a breathable layer and a braided layer sequentially arranged from the inside to the outside, comprising the following steps:
[0021] In step 1, the raw material of the support layer is extruded through a single-screw extruder to extrude a pipe with spiral reinforcing ribs, the inner diameter of the pipe is 12.0±0.05mm, the wall thickness is 2.0±0.05mm, and the extrusion temperature is 130°C;
[0022] Step 2: Punch a number of equally spaced through holes along the axial direction on the pipe with the reinforced structure on the punching equipment. Leaked natural gas penetrates into the support layer from the gas permeable layer;
[0023] Step 3, irradiating the above-mentioned perforated pipe through an electron accelerator or a cobalt source or an ultraviolet light source to obtain a support layer, and the irradiation dose is 10-20 Mrad;
[0024] Step 4: Coating a layer of ...
Embodiment 2
[0029] A production method of a gas detection tube, the gas detection tube comprises a support layer, a breathable layer and a braided layer sequentially arranged from the inside to the outside, comprising the following steps:
[0030] Step 1, extruding the raw material of the support layer through a single-screw extruder to a pipe with a groove structure, the inner diameter of the pipe is 12.0±0.05mm, the wall thickness is 2.0±0.05mm, and the extrusion temperature is 150°C;
[0031] Step 2: Punch a number of equally spaced through holes along the axial direction on the pipe with the reinforced structure on the punching equipment. Leaked natural gas penetrates into the support layer from the gas permeable layer;
[0032] Step 3, irradiating the above-mentioned perforated pipe through an electron accelerator or a cobalt source or an ultraviolet light source to obtain a support layer, and the irradiation dose is 10-20 Mrad;
[0033] Step 4: Coating a layer of methyl silicone oi...
Embodiment 3
[0038] The difference between this example and Example 2 is that the thickness of the breathable layer is 0.8-0.9mm, the material of the breathable layer is ethylene acetic acid with a VA content of 16wt% and a melt index of 2g / 10min (190°C, 2.16kg). Vinyl Ester (EVA).
[0039] To sum up, the production method of the gas detection tube of the present invention extrudes a support layer with a reinforced structure, which greatly increases the strength of the support layer and prolongs the service life of the gas detection tube; at the same time, it is used outside the gas permeable layer. The braided belt is woven with one layer of the braided layer, and the braided layer is used to filter large particles of impurities, protect the breathable layer and the support layer from being worn by sand and gravel during the pipeline laying process, and make transportation more convenient. .
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Abstract
Description
Claims
Application Information
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