If the inner tube valve screw pinch, thread damage, stand under the gland nut bends or valves when the tube is not sealed, you must replace it.
Inner tube valve repair including thread, the method is as follows:
(1) check the ridge and adjacent parts of the inner tube valve with or without defects, such as technology in good condition, and the valve snaps well, valve should be checked.
(2) if the valve pipe thread damage, repair wire tapping tapping threads available.
(3) the unserviceability of the Tire Valve should be replaced.
(4) through the vents to remove valve from the inner tube, inner tube when there is no crack on the wall, you can cut open at the mouth of 7~8mm.
(5) in inner tubes, which put the new valves, to embedding flange hole, install bridge-shaped pad and tighten the valve nut spanners. Valve bridge-shaped mats should be installed, that is along the long axis of the ellipse tubes arranged in a circle, instead of the cross; and not to bend the bridge-shaped mat, his head should be 30 degrees. Bridge pads installed towards the outside, bent part of the valve should be sideways towards the inner tube tube.
(6) fill the wound.
(7) in order to remove or in-line valves and cut into the hole to supplement good.
(8) when replacing diesel light vehicles on the inner tube rubber mouth, free knife when cutting the old valve and silicon carbide grinding wheel on the inner tube valve grinding rest. Then place in the mill and the new rubber valve seat (flange) coated with glue and drying.
Get new valves stick ready to place, to make the valve holes precisely consistent with inner tubes and rubber edge you want to embed in the inner tube of the valve seat inside the cave. Roller pressure valves and special curing curing on the valve plate.
When you replace and repair valves, to check the integrity of the flange. Such as flange damage, must be replaced with new parts. Replace the flange of the steps are as follows:
(1) by filing a good waste tube cut a thin, oval, its dimensions for large inner tube 160×90 (mm) for a small tube of the 140×80 (mm), and then a long rough, and along the external edge is cut into the slope. For in-use gasoline to clean after the surface had been filed, brushing glue twice, and then be dried after each brushing.
(2) from the coated fabric layer in sample cut from two elliptic slice, its dimensions for large inner tube 140×70 (mm) and 120×50 (mm) for small tubes for 120×100 (mm) and 100×40 (mm) and then brush the glue on both sides, and drying.
(3) on the rubber sheet placed on small, then put glue layer thin slices of fabric and placing symmetrical. Shall have the same distance between the sides and edges, and roller compaction.
(4) the glue layer thin slices of fabric edge inner tube covered with glue and thin Central hollow punch punching diameter 5mm small round holes.
(5) in the inner tube towards electing a no wound on the inside of the rim, with a metal brush or silicon carbide grinding wheels sanding. Size of the grinding parts, size 5mm size flange on each side;
(6) remove the tire ash, wipe the surface of the ground with gasoline, then brush two glues, and drying after each brushing.
(7) in the tube brush on glue and dry parts, paste prepared flanges and flange hole coincides with the hole on the tube, and then compacting it with the roller tube plate curing on.
(8) after curing wall of the inner tube in a flange Centre holes with an awl, and embedding from the inner tube valve; placed on the bridge-shaped pad, tighten the nut. Bridge pads should follow the tube installed.
Repairing the old flange sections.
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Global 80% in China
According to statistics, 2010 main valve core enterprises total sales revenue reached 2.03 billion yuan, an increase of 14.5%; valve output was 1.65 billion, an increase of 16.8%; core output of 2.22 billion, an increase of 3.6%. Estimated 2010 valve cores total sales revenue reached 3.9 billion yuan in China, valve output reached 3 billion, core production reached 3.2 billion. Valve core output in China has reached 80% per cent of global production, gradual transfer to China by the valve core of the world.
Last year, the valve core enterprises machine keeps running, worker overtime production, enterprise technology and capacity expansion projects. Hangzhou million pass company new launched has a article fetal pressure monitoring system (TPMS) valve mouth line; Jiangyin Bo, company new increased has a valve core automatically Assembly equipment; Jiangyin innovation company and Shanghai insurance lung company increased technology and equipment inputs, continued expanded production scale; gongzhuling in the large company will valve core capacity improve 20% around, products still supply; gaomi with create car accessories limited take Enterprise overall relocation, more significantly expanded capacity; Shanghai insurance lung car technology company limited new Shang fine benefits line, This is my first valve core industry of lean production lines. Preliminary, and in 2010 more than industry-wide capacity 20%, larger increases.
Export promotion impact
According to statistics, 2010 main valve core enterprises export 1.0199 billion yuan, an increase of 29.6%. Plus six Hui and Hui two Taiwan-funded enterprises in Xiamen, 2010 China valve core exports more than 2.2 billion yuan. Among them, the backbone export Enterprise Pallan, innovation, Jiangyin, Hangzhou, Shanghai wantong, Jiangyin Premier autoparts, Ningbo ouyadaocheng, anchi industries and the Ningbo siming auto parts in Foshan. Hangzhou wantong enterprises export sales income of 80% above is a genuine export-oriented enterprises. Pallan, Hangzhou, Shanghai wantong achieve batch to supply world auto giants such as Ford makes it, entering the world auto parts procurement system, raise the level of valve core industry internationalization in China and formed a strong brand on a global scale.
Economic benefits after former high low
Integrated valve core business information, statistics of 2010 industry essentially flat with a year earlier. Profit in the first half, but the second half as the price of copper, rubber and other raw materials rose sharply, Enterprise benefit began falling sharply. Copper prices rose to 60,000 from 40,000 yuan per ton in early Yuan/ton, increases nearly 50%, rubber prices rise nearly 100%. Valve core businesses despite three rounds of price increases, totaled about 20%, but hardly enough to offset the effects of rising raw materials costs. Small business losses, some companies consciously reduced yields. Facing higher raw material prices, valve core enterprise through energy saving, equipment, capacity expansion measures, such as price increases digestive cost pressures, maintaining healthy and stable development of the industry. Valve cores in current demand, prices on an higher trend, 2011 valve core industry is expected to be a bumper year.
1. Tires using the principles of practice has proved that correct use of tire should be 6 points:
① correctly handling tires and strict adherence to work under pressure and load.