CN1024214C - Sealed air valve - Google Patents

Abstract

The present invention relates to a sealed valve, particularly to a valve for inflating a bicycle. In order that the valve of a bicycle can be high sealed and does not lead for a long term, the present invention adopts liquid sealing cushion material of adhesive substances capable of being used repeatedly, for example, non-drying sealing glue, semi-drying sealing glue or pressure sensitive glue (self-adhesive glue), etc., to be coated on the surfaces of cushions ir elastic cushions arranged in the positions of a valve piston, an air cap, a cushion of a metal pressure type, etc., the adhesiveness of the adhesive substances is not dry for a long term, the liquid sealing cushion material can fill rugged parts and gaps of the contact surface of each connecting part of the valve, and thereby, the valve can be high sealed for a long term.

Description

Sealed air valve

The present invention relates to a kind of valve of inflating usefulness, particularly the valve of bicycle tyre inflation usefulness.This kind valve comprises the valve barrel, has the valve piston of soft rubber valve inside, covers the gas cap of piston gas port and compresses the metal pressure pad of the inner tube of a tyre.

Bicycle tyre is because exist the valve blow-by problem, so a short period (about general fortnight) just needs regularly to fill once gas to tire at interval, if winter, so because the influence of low temperature can make the elasticity of soft rubber valve inside reduce, will shorten the blanking time of inflation, just need fill once gas in several days.People fail to find more satisfactory method to solve the gas leakage and the antifreeze problem of valve always and have invention to propose two kinds of methods in the hope of addressing this problem for a long time, a kind of solution of inventing proposition is that a kind of micro pump is contained on the valve of wheel, utilize the rotating band of a wheel piston of taking offence to inflate to valve or utilize the size variation of the formed centrifugal force of different rotating speeds of wheel, making the pneumatic hammer with certain mass drive the inflator reciprocating motion of the pistons to inflate to valve, so just need not inflate to valve separately, but this method is because need install micro pump on wheel, so the cost raising is more.And inflator is easy to damage after falling down, and vehicle is being ridden relatively harder.For this reason, another invention proposes a kind of improvement valve and solves tire gas leakage problem.Chinese patent 86203113 proposes a kind of valve that does not have the rubber valve core, and this valve is blocked the piston gas port with a rubber cylinder, replaces the sealing of soft rubber valve inside, and Chinese patent 86204226 proposes a kind of leakproof valve with twice air-lock.This kind valve is except with the sealing of soft rubber valve inside, also adds a rubber cylinder that has a miniature pore in the valve the inside, and its miniature pore can utilize elasticity to tighten, and with it valve is carried out double seal.Chinese patent 86205221 proposes a kind ofly to add the valve of a thick rubber seal at valve piston root, is easy to damaged and rotten and gas leakage that cause in order to prevent the soft rubber valve inside as sealing gasket.This valve proposes to add at piston gas port place a gas cap that has an elastic insert simultaneously, increase the sealability of valve, more than several inventions all use the solid bedding and padding that valve is sealed, thereby it is higher to the requirement on machining accuracy of valve mechanical part contact surface, and, the solid pad can not fill up rough and uneven in surface on the junction plane fully because compressing in any case yet, on the interface, always there is the gap, accounts for 80 to 90 percent the contact interface that causes leakaging cause and leak so can not overcome.(see " liquid polymers sealing material " Chemical Industry Press 1980 version 149 pages 150 pages) is so sealing effect is still undesirable, more than several with the bright constraint of all not breaking away from the conventional art thought of solid bedding and padding sealed air valve, this is because it is believed that valve is the parts that need often dismounting to inflate, and can not use adhesive sealing.If inflation once or dismantle valve and just smear also unusual trouble of glue, and this trouble is far more than and need often inflates the trouble that is produced.

The objective of the invention is to avoid above-mentioned the deficiencies in the prior art part and provide a kind of can long term seal and do not leak, its sealability is not subjected to the influence of cold climate in winter and makes simple.Sealed air valve easy to use.

This kind sealed air valve is that usefulness can reusable material for liquid seal packing sealed connection part.Coating on the connected element of valve can reusable non-drying sealant, semi-drying sealer or pressure sensitive adhesive (adhesive sticker).Like this when valve sealing connects, this material for liquid seal packing just can firmly cling and interconnect parts and can fill up rough and uneven in surface part on each junction plane, thereby makes valve realize high-seal.Because can not doing for a long time, this sealing bedding and padding do not keep viscosity again, so can dismantle use repeatedly.

Contact position such as the piston of this valve and valve barrel, gas cap and valve piston, valve pressure pad and tire all fill up liner (comprising elastic insert) and coat non-drying sealant on liners, and semi-drying sealer or pressure sensitive adhesive etc. can reusable liquid packings.After liner compressed, each of valve connects the slit just can all realize high-seal like this.

The present invention because adopt the phase of can spending do not do and also keep viscosity can reusable material for liquid seal packing to valve sealing, do not leak so can make the long-term high-seal of valve, reduce the trouble of often inflation and the electricity consumption of saving electric aeration device, this kind sealed air valve is compared with the existing valve of solid bedding and padding that uses, do not have compression fatigue and elastic failure, stress relaxation etc. to cause the phenomenon of leakage, thereby seal very reliable.Because the employed liquid seal material of this kind valve is not done for a long time and is kept viscosity, so inflate and dismantle also very easy, also need not again when connecting once more gluing directly sealing get final product.The present invention because propose to use for a long time valve parts of not doing, can reusable material for liquid seal packing be tightly connected particularly, need often inflate the contradiction of dismounting and gluing liquid seal so solved valve effectively, realize a kind ofly can carrying out industrial production by factory and earlier material for liquid seal packing being coated on the solid liner face of (comprising elastic insert), the user only need change the valve of the high-seal that the liner of valve promptly can be made into." gluing " valve is become a reality, overcome technical prejudice, satisfied the demand that people wish to solve valve blow-by for a long time, the material for liquid seal packing that promptly uses because of this valve can stand subzero tens low temperature of spending and invariance again, so even this kind valve also can keep high-seal in winter in the severe cold low temperature, therefore, this valve also is a kind of antifreezing valve, can solve the winter protection problem of cold area bicycle effectively.

Fig. 1 in the accompanying drawing is the schematic representation of the sealed air valve of proposition according to the present invention.

Describe the details of the concrete sealed air valve that proposes according to the present invention in detail below in conjunction with accompanying drawing.

Solid and reliable and make simply for the sealing that makes valve, the end face of the valve barrel 1 that has screw thread is directly made sealing plane, be used to support being equipped with the two-sided valve piston 3 that scribbles the liner 2 of material for liquid seal packing.After retaining ring 4 that piston is had a screw thread entangles and tightens with the valve barrel, just can realize the sealing of piston and barrel usefulness material for liquid seal packing like this.

Piston gas port position has screw thread, cover the piston gas port with the two-sided liner 5 that scribbles liquid packing, on liner 5, be stained with a lining lid 6 made from metal or plastics, with the integral pressure that keeps 7 pairs of liners of gas cap and when using thin liner, also be unlikely to damage liner because of the twisting when tightening gas cap, after the gas cap that has screw thread is put and tightens, just can realize like this with the sealing of material for liquid seal packing to the piston gas port.

Compress the inner tube of a tyre 8 metal pressure pad 9 above be equipped with the two-sided liner 10 that scribbles material for liquid seal packing, after tightening pressure pad screw 11, then valve just tightly sticks together with the inner tube of a tyre.So just can realize the sealing of the inner tube of a tyre and valve with material for liquid seal packing.

Valve inside 12 is enclosed within on the stem stem 13 of valve piston, in order to be easy to install the liner that scribbles the liquid seal pad, improve the valve sealing performance, so no longer utilize the soft rubber valve inside as liner, its main effect be when preventing to inflate gas to external leakage, but because piston has no longer compressed valve inside, so in order to reach the length that length that above-mentioned requirements must make valve inside is equal to or less than the stem stem of valve piston, to prevent because the internal diameter that valve inside is not enclosed within the part on the piston stem stem less than the internal diameter that is enclosed within the part on the stem stem in the valve inflation because the reaction force that gas produces glides valve inside and is blown off.

Through above sealing step, just can realize the high-seal of each connection part of valve with material for liquid seal packing.

Claims (8)

1, sealed air valve comprises the valve barrel, has the valve piston of soft rubber valve inside, covers the gas cap of piston gas port and compresses the metal pressure pad of the inner tube of a tyre, it is characterized by valve the parts that are tightly connected above scribble can reusable liquid packing.

2, valve according to claim 1, it is characterized by the valve sealing liner above scribble can reusable liquid packing.

3, valve according to claim 1 and 2, it is characterized by liquid packing is the semi-drying sealer.

4, valve according to claim 1 and 2, it is characterized by liquid packing is pressure sensitive adhesive.

5, valve according to claim 1, the end face that it is characterized by the valve barrel are sealing planes.

6, valve according to claim 1, the length that it is characterized by the soft rubber valve inside is equal to or less than the length of valve piston stem stem.

7, valve according to claim 2, it is characterized by liner is elastic insert.

8, valve according to claim 1 and 2, it is characterized by liquid packing is non-drying sealant.