The rapid release valve of automobile brake chamber
Technical field
The invention belongs to automobile technical field, particularly a kind of rapid release valve that is used for automobile brake chamber.
Background technology
In the brake system of automobile, brake activation valve produces pressurized air at glancing impact, pressurized air enters in the threeway fitting by brake piping,, is promoted brake strap driving is braked respectively in left and right sides brake piping enters the left and right sides air chamber of vehicle bridge by the threeway fitting.When brake off, the pressurized air of left and right sides compressed air brake cylinder must be got back in the threeway fitting through left and right sides brake piping, turns back to the brake activation valve place by brake piping again and discharges.Because the air pressure and the air pressure in the brake piping of left and right sides compressed air brake cylinder can not in time be discharged, cause the time of removing whole braking approximately to need for 2 seconds.Like this, not only influence the moving velocity of automobile, but also increased oil consumption.Simultaneously, also cause hot unusual, the easy carbonization of brake strap of wearing and tearing aggravation, wheel hub of brake strap, directly influenced the service life of brake system, even can cause train operation accident.
For this reason, Chinese patent 022555102 provides a kind of " rapid release valve ", it comprises housing, valve seat and bidirectional piston, housing is threaded with valve seat, the central authorities of housing have admission port, the lower end shutoff of admission port has bidirectional piston, is pressed with valve spring between bidirectional piston and valve seat, and air extractor duct fixedly is communicated with compressed air brake cylinder.When braking was removed, the air pressure of compressed air brake cylinder was discharged from rapid release valve nearby, has shortened evacuation time.But because this rapid release valve is to rely on bidirectional piston in the form of sheets to come leak free in housing, so piston has skew slightly, will cause poorly sealed phenomenon.This has directly influenced brake system of car braking effect in use, and rapid release valve is broken down easily, and shorten its service life.
In addition, after the elastic failure of spring, can influence the normal use of rapid release valve, reliability is not high yet.Simultaneously, pressurized air is directly discharging in the deflation course, so noise is very big.
Summary of the invention
The purpose of this utility model is at the existing the problems referred to above of existing rapid release valve, and a kind of rapid release valve of structure improved automobile brake chamber is provided, and makes its not only sealing property height, safe and reliable, but also has characteristics such as simple in structure, long service life.
The purpose of this utility model can realize by following technical proposal: the rapid release valve of this automobile brake chamber comprises valve body, induction opening and air gate are arranged in valve body, be provided with valve seat in the valve body, the center of valve seat has an air bleed hole that connects valve seat, air bleed hole communicates with induction opening and air gate, it is characterized in that, be provided with a valve block between described valve body and the valve seat, valve block is between the inner orifice of the inner orifice of induction opening and air bleed hole, and valve block can be movable and when the inner orifice of inner orifice that is in induction opening or air bleed hole induction opening or air bleed hole be sealed; External diameter near valve block one end on the described valve seat is littler than valve block internal diameter, and is extended with the leg of several length unanimities of well-distributed on its side, and leg contacts with the valve body inboard.
The rapid release valve of this automobile brake chamber is to come leak free by valve block.Work as glancing impact, pressurized air enters from the induction opening of valve body, and the pressure of air is pushed valve block, and valve block is blocked up on the air bleed hole of valve seat, makes air bleed hole be in sealing state.At this moment, air gate communicates with induction opening, and pressurized air just enters in the compressed air brake cylinder through induction opening, air gate successively, produces braking.When brake off, pressurized air from compressed air brake cylinder in air gate returns valve body.In this process, pressurized air is pushed valve block, valve block break away from air bleed hole and roof pressure on the inner orifice of induction opening, make air inlet position in sealing state.By this leg, valve seat is played positioning action, valve seat can not swung in valve body, is beneficial to the sealing of valve block to air bleed hole.Simultaneously, also make to remain with the space between valve seat and the valve body inboard, that is to say by this space to make induction opening, air gate and air bleed hole communicate.Therefore, the pressurized air that enters valve body can outwards be discharged by air bleed hole.Owing to when brake off, in time promptly pressurized air is emitted, so the evacuation time during brake off has shortened greatly.On the other hand, such structure has also been reduced the manufacturing materials of valve seat, has lowered the cost of manufacture of valve seat.
In the rapid release valve of above-mentioned automobile brake chamber, it is that material is made that described valve block adopts rubber.Employing rubber is material, can make valve block have certain rigid, again excellent sealing performance can be arranged when valve block seals.
In the rapid release valve of above-mentioned automobile brake chamber, the middle part of described valve block is embedded with metal inserted piece.Rapid release valve in the course of the work, its inside has very strong air pressure, the metal inserted piece of valve block internal layer has improved the intensity of valve block, makes valve block can keep its shape can excessive deformation under strong gas pressure, and can restore rapidly.
In the rapid release valve of above-mentioned automobile brake chamber, the noise silencer that is being connected on the described valve body, noise silencer is positioned at the air bleed hole place.Pressurized air is when the air bleed hole exhaust, and noise silencer has just played the effect that reduces noise.
In the rapid release valve of above-mentioned automobile brake chamber, described noise silencer is made up of the noise cover of a coherent louver in side and the noise elimination silk that is loaded in the noise cover.By the effect that can play noise-decreasing of eliminating the noise, pressurized air discharges through air cleft more then.
In the rapid release valve of above-mentioned automobile brake chamber, the outside of the end of described noise cover has outer groove one, and noise cover is placed on the valve body, and a clip is stuck in the outer groove.Structure by such is connected in noise cover on the valve body.
In the rapid release valve of above-mentioned automobile brake chamber, described valve body inboard has inner groove one, and jump ring is embedded in the inner groove, and jump ring is pressed on the end of valve seat.By jump ring valve seat is fixed in the valve body firmly.
In the rapid release valve of above-mentioned automobile brake chamber, the nose end of giving vent to anger on the described valve body is by the coupling bar that is being threaded, and the other end of coupling bar is used for being connected with compressed air brake cylinder.Rapid release valve can be loaded in the various vehicle braked system by changing coupling bar, make rapid release valve easy to connect.
Compared with prior art, in the rapid release valve of automobile brake chamber of the present utility model, the sealing between induction opening and the air bleed hole realizes by valve block.After moving, valve block all can realize better seal to air bleed hole or induction opening, make the sealing property height of this rapid release valve, the brake system of automobile is safe and reliable, do not influence automobile driving speed, can not increase oil consumption yet, the long service life of product can be widely used in various types of brake system of car.
Simultaneously, it only is made up of valve body, coupling bar, valve seat, valve block and noise silencer, and it is simple in structure, easy to maintenance.Also rapid release valve can be loaded in the brake system of various automobiles by coupling bar, convenient and simple during installation.At the noise silencer that the aperture of air bleed hole is provided with, the noise of exitting and being produced in the time of also can reducing brake off plays certain environmental-protection function.
Description of drawings
Accompanying drawing is the structural representation of the rapid release valve of automobile brake chamber provided by the invention.
Among the figure, 1, valve body; 11, induction opening; 12, air gate; 13, inner groove; 2, valve seat; 21, air bleed hole; 22, leg; 3, valve block; 31, metal inserted piece; 4, noise silencer; 41, noise cover; 411, outer groove; 412, air cleft; 42, noise elimination silk; 5, clip; 6, jump ring; 7, coupling bar; 8, tightening seal washer.
The specific embodiment
As shown in the figure, the rapid release valve of this automobile brake chamber is loaded in the brake system of automobile, and it is made up of valve body 1, valve seat 2, valve block 3, noise silencer 4 and coupling bar 7 etc.
Valve body 1 is a tee pipe fitting, and its inside is a cavity.Wherein two mouths of pipe of valve body 1 are respectively induction opening 11 and air gate 12, and cavity is communicated with induction opening 11 with air gate 12.The end of another mouth of pipe has inner groove 13 one, and inner groove 13 is recessed in valve body 1 medial surface.Valve seat 2 is loaded in the cavity of valve body 1, and the jump ring 6 that is loaded in the inner groove 13 blocks the end of valve seat 2, and valve seat 2 is fixed in the valve body 1.In the present embodiment, between valve seat 2 and valve body 1 medial surface tightening seal washer 8 that plays sealing function is housed.
Valve seat 2 is cylindric, and the center of valve seat 2 has an air bleed hole 21, and air bleed hole 21 connects the two ends of valve seat 2.Littler than valve body 1 cavity internal diameter near valve block one end diameter on the valve seat 2, it is rectangular distribution and length unanimity that the lateral surface at this minor diameter place is extended with 22, five legs of five legs 22.Leg 22 and the interior side contacts of valve body 1 cavity make valve seat 2 can not swing in valve body 1.And valve seat 2 is formed with the space with valve body 1 cavity inboard, and the space is communicated with induction opening 11, air gate 12 and air bleed hole 21.
Be provided with a valve block 3 between valve body 1 and the valve seat 2, valve block 3 is between the inner orifice of the inner orifice of induction opening 11 and air bleed hole 21.Valve block 3 can move in valve body 1, induction opening 11 sealings can be sealed air bleed hole 21 when valve block 3 moves to air bleed hole 21 when valve block 3 moves to induction opening 11.In the present embodiment, it is that material is made that valve block 3 adopts rubber, and is embedded with metal inserted piece 31 in the middle, so not only makes valve block 3 have higher leak tightness, has also improved its intensity.
Air bleed hole 21 places of valve seat 2 noise silencer 4 that is being connected, noise silencer 4 comprise a noise cover 41 and the silk 42 of eliminating the noise, and the silk 42 of eliminating the noise is loaded in the noise cover 41, and the outside of noise cover 41 has some and connects its in-to-in air clefts 412.Noise cover 41 is placed on the valve body 1, and clip 5 is placed in noise cover 41 outsides, thereby noise cover 41 is connected on the valve body 1.In the present embodiment, have outer groove 411 one in the outside of noise cover 41, clip 5 is loaded in the outer groove 411.
At glancing impact, utilize compressed-air actuated pressure, valve block 3 to be pushed to air bleed hole 21 places, valve block 3 seals up the inner orifice of air bleed hole 21, and pressurized air enters in the compressed air brake cylinder through induction opening 11, air gate 12, and automobile is realized braking.Stop glancing impact, the pressurized air in the compressed air brake cylinder turns back in the valve body 1, and pressurized air is pushed valve block 3, makes valve block 3 break away from air bleed holes 21 and moves to the endoporus place of induction opening 11, and the inner orifice of induction opening 11 is sealed up.Like this, pressurized air is outwards discharged through air gate 12, air bleed hole 21.Because air bleed hole 21 places are connecting noise silencer 4, the silk 42 of eliminating the noise so the pressurized air of discharging from air bleed hole 21 can be flowed through, and then the air cleft 412 from noise cover 41 is discharged.Therefore, just very big noise can not occur in the exhaust process, play sound deadening.Obviously, because pressurized air is emitted rapidly when brake off, so the evacuation time during brake off is shorter.
In addition, the air gate 12 of valve body 1 is communicated with by coupling bar 7 with automobile brake chamber.That is: an end of coupling bar 7 is screwed onto air gate 12 ends of valve body 1, and the other end is connected with compressed air brake cylinder.In the present embodiment, coupling bar 7 is provided with tightening seal washer 8 with the junction of valve body 1.Obviously, just can rapid release valve be loaded in the brake system of automobile easily by coupling bar 7.