Glass fiber reinforced plastic material analysis of the pneumatic valve, glass fiber reinforced plastic ball performance parameters of the pneumatic valve

for a long time, in chemical, petroleum, pharmaceutical and food industries, control, transmission medium pipeline corrosion pneumatic valve is generally adopt stainless steel, enamel, ferrosilicon, ceramics and ptfe corrosion-resistant materials, glass fiber reinforced plastic is nearly over the years has been developing rapidly a compound material. Glass fiber reinforced plastic with glass fiber reinforced material, reinforced plastic synthetic resin as the binder. With the development of China's glass fiber reinforced plastic, as reinforced material of plastic base, is made of glass fiber expanded to carbon fiber, boron fiber, aramid fiber, alumina fiber, silicon carbide fiber and so on. Due to the other glass fiber reinforced plastic material has better resistance to chemical corrosion, glass steel pipe and the pneumatic valve has been widely used. General stainless steel pneumatic valve hydrochloric acid at high temperature and alkali conditions can't be used alternately, glass fiber reinforced plastic pneumatic valve on price only about/of the same size stainless steel pneumatic valve.

analysis at present domestic matrix resin is mostly the material of glass fiber reinforced plastic ball pneumatic valve using modified phenolic resin, generally USES the short cut fiber reinforcing fiber. The glass fiber reinforced plastic ball pneumatic valve can only be used under the operation condition of the PN, greatly limits the range of application, make FRP excellent corrosion resistant performance is not done in play. In order to meet the demand of industry growing use pneumatic valve and all kinds of harsh demanding the need of using the environment, must be the existing glass fiber reinforced plastic material and production process of the pneumatic valve was improved, make it suitable for higher pressure range. Of continuous glass fiber reinforced glass reinforced plastics, this paper firstly studies the material mechanics performance, on the basis of the known FRP material performance parameters of the export of glass fiber reinforced plastic ball pneumatic valve design points.

the pneumatic ball valve selection used in the manufacture of pneumatic valve to the current domestic glass fiber reinforced plastic substrate materials mainly to two categories, epoxy resin and phenolic resin ( Including the modified varieties, such as: polyvinyl butyral modified phenolic, xylene modified phenolic resin, epoxy phenolic formaldehyde resin, etc. ) Give priority to, vinegar FRP pneumatic valve and modified gorge nan resin glass fiber reinforced plastic pneumatic valve has a small amount of production. As the reinforced material glass fiber is different form, but limited to the molding process, mainly in the form of short cut fiber reinforced. Short glass fiber reinforced composite material performance is not high, all kinds of glass fiber reinforced plastic pneumatic valve operating temperature limit is commonly ~ ℃, working pressure. ~。 MPa。 The scope of work pressure equivalent to the low pressure the pressure of work area.

material mechanics performance test. Test material
the thick plate with compound material of material which is made from continuous glass fiber reinforced vinyl resin, fiber structure and forming process and new type glass fiber reinforced plastic ball pneumatic valve production adopted by the continuous enhancement of fiber structure and molding process conditions, fiber content is the same. To facilitate the test surface ( Between the layers) Loading conditions, the performance of the composite materials, production of raw materials plate thickness for mm.
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test process according to the standard requirements of the size of the test specimen, made a group ( A) in each group The sample.
fix the specimen on the CSS electronic universal testing machine, and the load sensor, controller, power amplifier and computers connected to work together. Along the surface of inside and outside two direction, cutting root samples respectively, cutting root samples. Each group of test, test under the environment of ℃, repeat five times.
( l） Tensile test
the loading speed for mm/min, record the corresponding displacement load curve, connected sensors, in-plane tensile use YJY - at the same time B stretch meter records corresponding to the load deformation curve. By computing will record the load deformation curve is converted into the corresponding stress strain curve, get the overall composite materials tensile elastic modulus and tensile strength.
( ） For compression test
test loading speed. Mm/min, at the same time, record the corresponding displacement load curve. Compression strength test set is a mm diameter cylinder specimens at the center of the cylinder, beam through testing machine moved up and down the sample strength. Will record the load deformation of a curve is converted into a corresponding stress strain curve, get compressive elastic modulus and compression strength of the composite material.
( ） Bending test
the loading speed for mm/min, the sample as a laminated beam, transverse three point bending test, and record the corresponding center displacement load curve. By computing will record the load deformation curve is converted into the corresponding stress strain curve, get the bending elastic modulus and bending strength of the composite.
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test results from the experiments of continuous fiber reinforced composite material performance results within the surface average as you can see, using the mechanical properties of continuous fiber reinforced glass fiber reinforced plastic is the short cut fiber reinforced fiberglass has significant improvement, in-plane tensile strength compared with the short cut fiber glass reinforced plastics tensile strength, improve more than twice. This is because as a fiberglass reinforced material of fiber glass reinforced plastics is the main load bearing parts, after adopting continuous fiber reinforced, the percentage of fiber can be as high as %, and the fiber content of short cut fiber glass reinforced plastics is only about %. Of course, the mechanical properties of glass fiber reinforced plastic and other factors, such as the kinds of resin, etc.