CN104192133A - Anti-ineffectiveness three-control relay valve for vehicle - Google Patents

Abstract

The invention discloses an anti-ineffectiveness three-control relay valve for a vehicle. An air inlet, an air outlet, an exhaust port and three control air inlets are formed in a valve body of the anti-ineffectiveness three-control relay valve. An upper relay piston, an upper relay valve seat, an upper relay valve element, a lower relay valve element, a lower relay valve seat, a lower relay piston and a double-pass one-way valve are sequentially installed in the valve body. According to the anti-ineffectiveness three-control relay valve for the vehicle, the structure is simple, installation and use are convenient, when the pressure of a braking system of the vehicle is lower than 0.55 Mpa, high-pressure gas in a brake gas chamber of a brake cylinder can be rapidly released, an energy storage spring in the brake cylinder is made to conduct emergency brake, the brake intensity of the vehicle is effectively compensated for, the driving safety of the vehicle is guaranteed, fatal traffic accidents causing casualties are avoided, the problem that brake of an existing vehicle is ineffective under the condition of low pressure or no pressure is solved, and the social benefits and the economic benefits are high. The anti-ineffectiveness three-control relay valve is suitable for various trucks and passenger cars.

Description

Automobile-used anti-malfunctioning three control relay valves

Technical field

The present invention relates to a kind of brake control valve of Pneumatic braking system, say accurately and relate to a kind of automobile-used anti-malfunctioning three control relay valves.

Background technology

The safety of running car and the reliability of brake system are closely related.And advantages such as Pneumatic braking system is high with its reliability, fast response time, low cost of manufacture, use is pollution-free and obtained being widely used on Medium or severe type goods carrying vehicle and motor omnibus.Existing Pneumatic braking system is mainly provided with two and overlaps independently brake equipment, i.e. holding brake device and service braking device.When service brake, chaufeur is by stretcher control two-chamber main brake valve, high pressure gas in gascollecting cap cylinder are sent to respectively in each brake cylinder of the forward and backward bridge of vehicle through two-chamber main brake valve, high pressure gas promote brake cylinder work, and the push rod of each brake cylinder stretches out and drives brake wheel to realize service brake.When parking, close braking during standstill switch, the gas circuit between cut off high storage tank and back axle brake cylinder, meanwhile, the high pressure gas in back axle brake cylinder enter atmosphere, and energy stroage spring discharges and drives brake wheel to realize braking during standstill by push rod.While removing parking, open braking during standstill switch, the high pressure gas of gascollecting cap cylinder enter in back axle brake cylinder by braking during standstill switch, the pressure compressed energy-storage spring that utilizes high pressure gas to produce, drive in pusher retracted brake cylinder, the braking effect of back axle brake cylinder is removed.In concrete application, for preventing in Vehicle Driving Cycle process that, because of the excessive damage drg of braking force and linkage part, the main compression air brake in spring energy-storage braking and service braking device in holding brake device is forbidden the use that overlaps.The Medium or severe type goods carrying vehicle of Pneumatic braking system and motor omnibus are installed in the process of moving because of the wearing and tearing of brake component and the impact of ambient environment, there will be unavoidably cryogenic system pipeline ponding obstruction, the system element ponding fault such as hair fastener, the gas leakage of high low temperature system failure that freezes that freezes, easily cause car brakeing air pressure to reduce, when braking pressure is during lower than 0.55Mpa, can cause car brakeing malfunctioning, thereby cause great traffic accidents, there is larger potential safety hazard in existing Pneumatic braking system therefore.

Summary of the invention

The object of the invention is: a kind of automobile-used anti-malfunctioning three control relay valves are provided, these automobile-used anti-malfunctioning three control relay valves coordinate with other brake assemblies can be in the time that braking pressure reduces effective compensation indicating brake action, improve vehicle at infrabar or without the deceleration and stopping performance under atmospheric pressure state, improve the safety factor of vehicle.

Technical scheme of the present invention is: a kind of automobile-used anti-malfunctioning three control relay valves, comprise relay valve body, in described relay valve body, the sealing at interval is slidably fitted with relay piston and lower relay piston, above upper relay piston, be provided with upper chamber, offer the first control admission port being communicated with upper chamber at the top of relay valve body, below lower relay piston, be provided with lower chamber, bottom at relay valve body is provided with double-way check valve, this double-way check valve comprises that being divided into second on body wall controls admission port, the 3rd outlet of controlling admission port and being communicated with described lower chamber, in double-way check valve, be slidably installed to be useful on and control the sliding valve core that described outlet is communicated with described the second control admission port or the 3rd control admission port, in relay valve body, between upper relay piston and lower relay piston, be provided with valve pocket, on the sidewall of the middle part of relay valve body, be respectively equipped with the upper air extractor duct communicating with valve pocket, the exhausr port of lower admission port and connection atmosphere, on in valve pocket, lower interval be provided with servo valve seat and lower servo valve seat, upper servo valve seat is connected with upper air extractor duct, lower servo valve seat is connected with lower admission port, on the chamber wall at valve pocket middle part, sealing is fixed with valve sleeve, upper at valve sleeve, lower two ends seal respectively and are slidably fitted with servo spool and lower servo spool, valve sleeve with on, between lower servo spool, be top-loaded with respectively spring, described servo upper valve core, lower servo spool coordinates upper with described valve sleeve, cavity between lower servo valve seat is divided into the air chamber of giving vent to anger successively, exhaust air chamber and air inlet air chamber, the described air chamber of giving vent to anger is connected by the air flue of being located in relay valve body with air inlet air chamber, on described, in servo spool and lower servo spool, vertically offer respectively the exhaust hole that is communicated with exhaust air chamber, in valve sleeve and relay valve body, be also provided with the exhaust passage that is communicated with exhaust air chamber and exhausr port, relay piston bottom surface convexes with the convex platform being sealed and matched through servo valve seat on described and upper servo spool end face down on described, the external diameter of this convex platform is less than servo valve seat bore and is greater than the internal diameter of exhaust hole in servo spool, convex with the lower bulge coordinating with lower servo spool sealing bottom surface through described lower servo valve seat at the end face of lower relay piston, the external diameter of this lower bulge is less than lower servo valve seat bore and is greater than the internal diameter of lower relay valve in-core exhaust hole.

Automobile-used anti-malfunctioning three control relay valves of the present invention are simple in structure, easy to install, it is at motor vehicle braking system air pressure during lower than 0.55Mpa, it coordinates the high pressure gas of brake cylinder being inflated in compressed air brake cylinder rapidly to discharge with upper servo valve seat by upper servo spool, make the energy stroage spring release in brake cylinder realize emergency brake, the indicating brake action of vehicle is carried out to effective compensation, guarantee the driving safety of vehicle, avoid occurring the major traffic accidents such as personal casualty, automobile-used anti-malfunctioning three control relay valves of the present invention have solved existing vehicle at infrabar or there will be the problem of braking failure without air pressure, there is good Social benefit and economic benefit, be suitable at various lorries, on passenger vehicle, install and use.

Brief description of the drawings

Fig. 1 is the structural representation of the anti-malfunctioning vehicle Pneumatic braking system that adopts of the present invention;

Fig. 2 is the structural representation of automobile-used anti-malfunctioning three control relay valves of the present invention;

Fig. 3 is the structural representation of anti-malfunctioning main brake valve in Fig. 1;

Fig. 4 is the structural representation of intelligent Air Cut Valve in Fig. 1.

Detailed description of the invention

As shown in Figure 1, it is mainly made up of air compressor 1, air filter 2, four-loop protection valve 3, high-pressure gas cylinder 4, brake pedal 5, anti-malfunctioning main brake valve 6, intelligent Air Cut Valve 7, manual parking valve 8, propons single control relay valve 9, propons brake cylinder 10, propons drg 11, back axle single control relay valve 12, back axle brake cylinder 13, rear axle brake vi 14, automobile-used anti-malfunctioning three control relay valves 15 and low pressure alarm 16 and air-pressure gauge 17 specific embodiment of anti-malfunctioning vehicle Pneumatic braking system of the present invention.

Wherein, anti-malfunctioning main brake valve 6 as shown in Figure 2, it comprises the upper valve body 20 being tightly connected successively, middle valve body 34 and lower valve body 44, on the sidewall of upper valve body 20, be provided with back axle control admission port 27 and back axle control air extractor duct 28, be slidably fitted with upper piston cover 21 at the top seal of upper valve body 20, the top, bottom of upper piston cover 21 is pressed and is connected with retracing spring 26, in upper piston cover 21, by rubber spring 23, the tip-lever support 24 for the brake pedal 5 that is in transmission connection is installed, in upper valve body 20 below upper piston cover 21, be provided with uuper valve chamber, in uuper valve chamber, be provided with upper valve base 29 and with the normally closed upper valve core being sealed and matched 30 in upper valve base 29 bottom surfaces, convexing with down in the bottom surface of upper piston cover 21 with the end face top of upper valve core 30 presses the upper valve that transmission coordinates to drive boss 22.Be positioned in uuper valve chamber bottom on the inwall of upper valve body 20 and be sealed and installed with upper spring cover for seat 32, the bottom outer wall of upper valve core 30 and the inner wall sealing bearing fit of this upper spring cover for seat 32 are top-loaded with upper valve core support spring 31 between upper spring cover for seat 32 and upper valve core 30.On the sidewall of middle valve body 34, be respectively arranged with propons control admission port 42 and propons control air extractor duct 43, on the inwall at middle valve body 34 tops, sealing is slidably fitted with dummy piston 36, between the upper load bearing face of dummy piston 36 and upper valve body 20, be provided with the balance air chamber communicating with back axle control air extractor duct 28, in the lower inner wall of middle valve body 34, sealing is fixed with closing plate 39, between dummy piston 36 and closing plate 39, be provided with middle valve pocket, in middle valve pocket, be provided with middle valve seat 38 and with this in the normally closed middle spool 40 being sealed and matched in valve seat 38 bottom surfaces, between closing plate 39 and middle spool 40, be top-loaded with middle spool support spring 41.At dummy piston 36 center, also one is vertically provided with drive link 36, the upper end sealing of this drive link 36 slides through upper valve core 30 and drives top, the bottom surface pressure of boss 22 to be in transmission connection with upper valve, the lower end sealing of this drive link 36 slides through the downward valve body 44 of closing plate 39 extends, on drive link 36 outside faces that are arranged in below dummy piston 36, go back radial convex be provided with for the spool driving boss 37 of the end face sealing top force fit of spool 40.On lower valve body 44, malfunctioning control admission port 52 is prevented in vertical being interval with on anti-malfunctioning control air extractor duct 47, be provided with lower valve base 45 on the top of lower valve body 44, between lower valve base 45 and closing plate 39, be provided with lower valve chamber and often open with these lower valve base 45 end faces the bottom spool 46 being sealed and matched, between closing plate 39 and bottom spool 46, be top-loaded with bottom spool support spring.In lower valve body 44, be positioned at lower valve base 45 below sealing be slidably fitted with the lower piston cover 51 that diameter is greater than lower valve base 45 internal diameters, be coated with lower piston 50 at lower piston Tao51 center, the top of lower piston 50 is stretched in lower valve chamber and the bottom face of close drive link 36 through lower valve base 45, middle part at lower piston cover 51 is provided with interior gear edge, on lower piston 50, be positioned at gear along below be provided with outer turning edge, interior gear along, outward turn edge and the inwall of lower valve body 44 between composition and prevent the air chamber that malfunctioning control admission port 52 communicates.Between the interior gear edge of lower piston cover 51 and lower valve base 45, in space, be provided with middle piston 48, in this outer wall of piston 48 and the inner wall sealing bearing fit of lower piston cover 51 and in this piston 48 to slide up and down the jump ring that stroke overlapped 51 interior gear edge and corresponding setting by lower piston spacing.In this, the top external diameter of piston 48 is less than the internal diameter of lower valve base 45, it is outer and be upward through lower valve base 45 sealing top and be pressed on the bottom surface of bottom spool 46 that in this, the top of piston 48 is set in lower piston 50, between the interior gear edge of lower piston cover 51 and middle piston 48, is top-loaded with middle piston support spring 49.Between middle piston 48 and lower valve base 45, be installed with the gas channel that connects lower valve base 45 and anti-malfunctioning control air extractor duct 47.Also seal and be provided with lower spring cover for seat 53 in the bottom of lower piston cover 51, between the bottom surface of this lower spring cover for seat 53 and lower piston cover 51, coordinate by jump ring is spacing, the bottom outer wall sealing bearing fit of the inwall of this lower spring cover for seat 53 and lower piston 50 is top-loaded with lower piston support spring 54 between lower spring cover for seat 53 and outer the turning edge of lower piston 50.Bottom at lower valve body 44 is also provided with total exhausr port, and in total exhausr port, sealing is embedded with base 57, in the lower end sealing slip inserted base 57 of lower piston 50.In lower piston 50 and drive link 36, be equipped with the hollow channel being communicated with total exhausr port, wherein, on the top of drive link 36 and the top of lower piston 50 be equipped with exhausr port, on drive link 36, be arranged in spool and drive on the sidewall below boss 37 and offer the deflation hole communicating with its central aisle.Between base 57, lower spring cover for seat 53 and lower piston cover 51, establish Packed anti-malfunctioning balance air chamber, this anti-malfunctioning balance air chamber is communicated with lower valve chamber, anti-malfunctioning air extractor duct 47 and uuper valve chamber by the passage 56 being divided in upper valve body 20, middle valve body 34 and lower valve body 44, between base 57 and lower spring cover for seat 53, be top-loaded with lower balance spring,, on the sidewall of lower piston 50, also offer connection.

Automobile-used anti-malfunctioning three control relay valves as shown in Figure 3, it comprises relay valve body 60, be slidably fitted with relay piston 61 and lower relay piston 65 in the sealing at relay valve body 60 interior intervals, in relay valve body 60, be positioned at relay piston 61 above be provided with upper chamber, offer the first control admission port 63 being communicated with upper chamber at the top of relay valve body 60, in relay valve body 60, be positioned at lower relay piston 65 below be provided with lower chamber, bottom at relay valve body 60 is provided with double-way check valve, this double-way check valve comprises that being divided into second on body wall controls admission port 68 and the 3rd outlet of controlling admission port 69 and being communicated with lower chamber, in double-way check valve, be slidably installed to be useful on and control the sliding valve core 70 that its outlet is communicated with the second control admission port 68 or the 3rd control admission port 69.In relay valve body 60, between upper relay piston 61 and lower relay piston 65, be provided with valve pocket, on the sidewall of the middle part of relay valve body 60, be respectively equipped with the upper air extractor duct 77 communicating with valve pocket, lower admission port 78 and connect the exhausr port (in figure depending on not going out) of atmosphere, on in valve pocket, lower interval be provided with servo valve seat 72 and lower servo valve seat 73, upper servo valve seat 72 is connected with upper air extractor duct 77, lower servo valve seat 73 is connected with lower admission port 78, on the chamber wall at valve pocket middle part, sealing is fixed with valve sleeve 74, upper at valve sleeve 74, lower two ends seal respectively and are slidably fitted with servo spool 75 and lower servo spool 80, between valve sleeve 74 and upper servo spool 75 and lower servo spool 80, be top-loaded with respectively spring.Upper servo spool 75, lower servo spool 80 coordinates the air chamber of giving vent to anger that the cavity between upper servo valve seat 72 and lower servo valve seat 73 is divided into successively to top with valve sleeve 74, the exhaust air chamber at middle part and the air inlet air chamber of bottom, wherein, the air chamber of giving vent to anger is connected by the interface channel 80 of being located in relay valve body with air inlet air chamber, simultaneously, in upper servo spool 75, vertically offer the upper aiutage hole 76 of servo valve seat 72 and exhaust air chamber in connection, in lower servo spool 80, vertically offer the lower exhaust hole 81 of servo valve seat under connection 73 and exhaust air chamber, in valve sleeve 74 and relay valve body 60, be also provided with the exhaust passage 79 that is communicated with exhaust air chamber and exhausr port.The bottom surface of upper relay piston 61 convex with down through on servo valve seat 72 convex platform 64 that is sealed and matched with upper servo spool 75 end faces, the external diameter of this convex platform 64 is less than servo valve seat 72 internal diameters and is greater than the internal diameter of upper exhaust hole 76 in servo spool 75, convex with the lower bulge 66 coordinating through lower servo valve seat 73 and with lower servo spool 80 sealing bottom surfaces at the end face of lower relay piston 65, the external diameter of this lower bulge 66 is less than the internal diameter of lower servo valve seat 73 and is greater than the internal diameter of lower exhaust hole 81 in lower servo spool 80.

As shown in Figure 4, it comprises the valve body 83 of dying to intelligence Air Cut Valve, is arranged with priority valve and main valve dying in valve body 83, is provided with the lever transmission mechanism of be in transmission connection priority valve and main valve at the top of the valve body 83 of dying.Wherein, priority valve comprises is located at guide's valve pocket of dying in valve body 83, the arrival end of this guide's valve pocket communicates with the admission port 84 arranging on the valve body 83 of dying, the exit end of this guide's valve pocket is communicated with the arrival end of main valve by the free air diffuser 99 in valve body, vertically sealing on the top of this guide's valve pocket slides is equipped with guide piston 86, the bottom surface of this guide piston 86 is the load bearing face that connects admission port 84 and free air diffuser 99, upper end at this guide piston 86 is fixed with push rod 87 with one heart, the end of push rod 87 upwards passes the die upper surface of valve body 83 and the input end of lever transmission mechanism and is in transmission connection.Main valve comprises is located at the main valve chamber of dying in valve body 83, be located at the main valve seat between main valve chamber and free air diffuser 99 and be located in main valve chamber by the corresponding main valve plug being sealed and matched 101 of top pressure spring and main valve seat, the arrival end of this main valve chamber is communicated with free air diffuser 99 by main valve seat, the exit end of this main valve chamber is communicated with by outlet passageway 102 and the air extractor duct arranging on valve body (in figure depending on not going out), the push rod 100 being fixed with one heart on the top of main valve plug 101, this push rod 100 upwards extends sealing the die upper surface of valve body 83 and the mouth of lever transmission mechanism of the place of wearing that slide and is in transmission connection.Also be provided with the exhausr port 105 that connects atmosphere in the bottom of main valve chamber, the outer sieve 106 of eliminating the noise that is provided with of exhausr port 105, bottom at main valve plug 101 is fixed with adapter sleeve 103 with one heart, in adapter sleeve 103, be slidably fitted with and exhaust plug 104 for opening and closing exhausr port 105, this exhaust plug 104 coordinates with adapter sleeve 103 bottom limit blocks, in adapter sleeve 103, between main valve plug 101 and exhaust plug 104, be top-loaded with spring, when it is opened or close main valve when main valve plug 101, exhaust plug 104 can close synchronously or unlatching exhausr port 105.Leverage comprises active lever assembly and the passive lever assembly that transmission coordinates, wherein, initiatively lever assembly comprises the lever support 88 of being located in push rod 87 ends and is arranged in the active lever 89 in lever support 88, relatively in lever support 88 convex with a pair of initiatively fin of lever both sides 89 Shang Xia that is clamped in, this fin forms the fulcrum of active lever 89.Passive lever assembly comprises that spring sticks up seat and is located at spring and sticks up the passive lever 96 on seat, spring sticks up seat and is mainly made up of cylindrical spring 93 and the power input spring perch 94 and the power delivery spring seat 95 that are separately fixed at cylindrical spring 93 two ends, power delivery spring seat 95 rotates and is assemblied on the permanent seat 90 that relay valve body 83 tops set firmly, what passive lever 96 tilted is fixedly mounted on power delivery spring seat 95, initiatively one end of lever 89 is by top and permanent seat 90 spacing top force fits, initiatively the other end of lever 89 presses transmission to coordinate by top power input spring perch 94 tops of sticking up in seat with spring, one end of passive lever is pressed spacing cooperation by top with permanent seat 90 tops, the other end of passive lever 96 and push rod 100 tops are pressed and are in transmission connection, be positioned at passive lever 96 on permanent seat 90 above, be also fixed with locating dowel pin 97.In the time that guide piston 86 is subject to gas pressure up, push rod 87 drives initiatively lever 89 upwards to swing by lever support 88, initiatively lever 89 drives power input spring perch 94 to be upturned, under cylindrical spring 93 effects, spring sticks up seat and swings, thereby power delivery spring seat 95 rotates and makes passive lever 96 make main valve plug 101 descending to lower swing by push rod 100, opens main valve.In intelligent Air Cut Valve, be also provided with main air pressure adjusting mechanism and assist gas pressure adjusting mechanism, wherein, main air pressure adjusting mechanism comprises that the adjusting pole, adjustment screw 91 and the top of spinning on adjusting pole that are installed on permanent seat 90 are contained in the pressure spring 92 of adjusting between screw 91 and lever support 88.Assist gas pressure adjusting mechanism comprises that sealing is slidably mounted on the adjustment piston 109 of dying in valve body 83, this adjustment piston 109 is positioned at the below of guide piston 86, the upper end of this adjustment piston 109 contacts and coordinates with the bottom of guide piston 86, on the valve body 83 of dying below adjustment piston 109, be provided with auxiliary adjusting seat, in auxiliary adjusting seat, be installed with the auxiliary screw 108 of adjusting, be top-loaded with and assist adjustment spring 110 auxiliary adjustment between screw 108 and adjustment piston 109, in addition, on valve body 83, be positioned at main air pressure adjusting mechanism and leverage is also covered with seal closure 98 outward dying, the auxiliary adjusting seat of assist gas pressure adjusting mechanism also seals and is fixed on valve body 83 bottoms of dying, in valve body 83, be also provided with communication seals cover 98 dying, the air pressure balance duct 107 of auxiliary adjusting seat and exhausr port.A side at main valve chamber is connected with pressure sensor 111, and this pressure sensor 111 is connected with low pressure alarm 16.

Air compressor 1 in anti-malfunctioning vehicle Pneumatic braking system of the present invention, air filter 2, four-loop protection valve 3, high-pressure gas cylinder 4, brake pedal 5, manual parking valve 8, propons single control relay valve 9, propons brake cylinder 10, propons drg 11, back axle single control relay valve 12, back axle brake cylinder 13, rear axle brake vi 14 grades are prior art, wherein, at manual parking valve 8, propons single control relay valve 9, on back axle single control relay valve 12, be equipped with the exhausr port that connects atmosphere, in propons brake cylinder 10 and back axle brake cylinder 13, be equipped with inflation compressed air brake cylinder, in back axle brake cylinder 13, be also provided with bleeder brake air chamber (energy stroage spring air chamber).The concrete connection of this Pneumatic braking system as shown in Figure 1, air compressor 1, air filter 2, four-loop protection valve 3 is connected by pipeline successively with high-pressure gas cylinder 4, the admission port of manual parking valve 8, propons admission port 27 and back axle admission port 42 on anti-malfunctioning main brake valve 6, the admission port 84 of intelligence Air Cut Valve 7, lower admission port 78 and the propons single control relay valve 9 of automobile-used anti-malfunctioning three control relay valves 15 are connected with high-pressure gas cylinder 4 by pipeline respectively with the admission port of back axle single control relay valve 12, the propons air extractor duct 43 of anti-malfunctioning main brake valve 6 and back axle air extractor duct 28 are respectively by pipeline and corresponding connection of control gas port on propons single control relay valve 9 and back axle single control relay valve 12, propons single control relay valve 9 is connected with the inflation compressed air brake cylinder in front brake cylinder 10 and rear brake cylinder 13 respectively with the air extractor duct of back axle single control relay valve 12, the air extractor duct of back axle single control relay valve 12 is controlled admission port 69 by pipeline branch road with the 3rd of automobile-used anti-malfunctioning three control relay valves 15 and is connected, the anti-malfunctioning control admission port 52 of anti-malfunctioning main brake valve 6 is connected by pipeline with the air extractor duct of intelligent Air Cut Valve 7, anti-malfunctioning control air extractor duct 47 on anti-malfunctioning main brake valve 6 is controlled admission port 63 by pipeline with first on automobile-used anti-malfunctioning three control relay valves 15 and is connected, the air extractor duct of manual parking valve 8 is controlled admission port 68 by pipeline with second of automobile-used anti-malfunctioning three control relay valves 15 and is connected, the upper air extractor duct 77 of automobile-used anti-malfunctioning three control relay valves 15 is connected with the bleeder brake air chamber of back axle brake cylinder 13 by pipeline.

In the time that the system pressure in vehicle Pneumatic braking system is normal, one road air pressure enters in intelligent Air Cut Valve 7, guide piston 86 effect of being stressed of intelligence Air Cut Valve 7 is up, promote by leverage that main valve plug 101 is descending to be opened air extractor duct and close exhausr port 105, make this intelligence Air Cut Valve 7 in normally open, high pressure gas are sent in the anti-malfunctioning control admission port 52 of anti-malfunctioning main brake valve 6 through intelligent Air Cut Valve 7, another road air pressure enters the back axle control admission port 27 of anti-malfunctioning main brake valve 6 and the passage 56 in being located at its valve body passes into respectively lower valve chamber, in anti-malfunctioning control air extractor duct 47 and anti-malfunctioning balance air chamber, lower piston cover 51 is moved under lower balance spring 55 effects and withstand on lower valve base 45 bottom surfaces, middle piston 48 moves down, dwindle the gap between bottom spool 46 and lower valve base 45, lower piston 50 moves down the distance increasing between drive link 36, simultaneously, by pipeline, high pressure gas being sent into first of automobile-used anti-malfunctioning three control relay valves 15 by anti-malfunctioning control air extractor duct 47 controls in admission port 63, in promotion, relay piston 61 is descending, it is descending that upper relay piston 61 promotes upper servo spool 75 by convex platform 64, open the passage of servo valve seat 72.While removing parking, manual parking valve 8 is pulled to the position of travelling, high pressure gas enter second of automobile-used anti-malfunctioning three control relay valves 15 through manual parking valve 8 and control admission ports 68 and enter that in lower chamber, to promote lower relay piston 65 up, promote sliding valve core 70 simultaneously and move to right, close the 3rd and control being communicated with of admission port 69 and lower chamber.It is up that lower relay piston 65 promotes lower servo spool 80 by lower bulge 66, open the passage of lower servo valve seat 73, high pressure gas are entered in the bleeder brake air chamber of back axle brake cylinder 13 from lower admission port 78 and through lower servo valve seat 73, interface channel 82, upper servo valve seat 72, upper air extractor duct 77, air pressure promotes the energy stroage spring compression in brake cylinder, energy stroage spring unclamps rear axle brake vi 14 by pipe link, removes parking.While braking in normal driving process, step on brake pedal 5, the tip-lever support 24 that brake pedal 5 promotes anti-malfunctioning main brake valve 6 by connecting rod is descending, tip-lever support 24 promotes upper piston by rubber spring 25 and overlaps 21 descending, upper piston cover 21 upper valve cores by bottom drive boss 22 drive drive link 36 and upper valve core 30 descending, back axle control admission port 27 and back axle control air extractor duct 28 are communicated with, open back axle single control relay valve 12, making high pressure gas enter in the inflation compressed air brake cylinder of back axle brake cylinder 13 and promote pipe link through back axle single control relay valve 12 drives rear axle brake vi 14 to realize back axle braking.Upper valve core contacts with drive link 36 end sealings after driving boss 22 descending, closes upper valve body exhaust passage.In promoting by middle spool driving boss 37 when drive link 36 is descending, spool 40 is descending, propons control admission port 42 is communicated with propons control air extractor duct 43, open propons single control relay valve 9, high pressure gas enter in the inflation compressed air brake cylinder of propons brake cylinder 10 and drive propons drg 11 to realize propons braking by pipe link through propons single control relay valve 9.Middle spool drives boss 37 and middle spool 40 to seal when contact the vent closure starting on its sidewall.In the time that service brake occurs that system gas forces down in 0.55Mpa, intelligence Air Cut Valve 7 is closed, simultaneously, pressure sensor 111 is connected low pressure alarm 16 for chaufeur warning, anti-malfunctioning control admission port 52 on anti-malfunctioning main brake valve 6 is died, lower piston 50 is up under 54 effects of lower piston support spring to be contacted with drive link 36 bottom surfaces, chaufeur is floored brake pedal 5, drive link 36 promotes lower piston 50 and drives lower piston cover 51 by lower spring cover for seat 53, middle piston 48 is descending, bottom spool 46 is the descending lower valve base 45 of closing under action of the spring, first of anti-malfunctioning control air extractor duct 47 and automobile-used anti-malfunctioning three control relay valves 15 are controlled admission port 63 and are died, up under the gas pressure of upper relay piston 61 in the bleeder brake air chamber of back axle brake cylinder 13, upper servo spool 75 in automobile-used anti-malfunctioning three control relay valves 15 closes closes relay valve seat 72, simultaneously, upper hole 76 and the exhaust passage 79 of pressure gas in back axle brake cylinder 13 in upper air extractor duct 77 and upper servo spool 75 enters atmosphere from exhausr port, energy stroage spring in back axle brake cylinder 13 discharges, back axle indicating brake action is compensated, improve back axle deceleration and stopping performance.

Claims (1)

1. automobile-used anti-malfunctioning three control relay valves, comprise relay valve body, it is characterized in that, in described relay valve body, the sealing at interval is slidably fitted with relay piston and lower relay piston, above upper relay piston, be provided with upper chamber, offer the first control admission port being communicated with upper chamber at the top of relay valve body, below lower relay piston, be provided with lower chamber, bottom at relay valve body is provided with double-way check valve, this double-way check valve comprises that being divided into second on body wall controls admission port, the 3rd outlet of controlling admission port and being communicated with described lower chamber, in double-way check valve, be slidably installed to be useful on and control the sliding valve core that described outlet is communicated with described the second control admission port or the 3rd control admission port, in relay valve body, between upper relay piston and lower relay piston, be provided with valve pocket, on the sidewall of the middle part of relay valve body, be respectively equipped with the upper air extractor duct communicating with valve pocket, the exhausr port of lower admission port and connection atmosphere, on in valve pocket, lower interval be provided with servo valve seat and lower servo valve seat, upper servo valve seat is connected with upper air extractor duct, lower servo valve seat is connected with lower admission port, on the chamber wall at valve pocket middle part, sealing is fixed with valve sleeve, upper at valve sleeve, lower two ends seal respectively and are slidably fitted with servo spool and lower servo spool, valve sleeve with on, between lower servo spool, be top-loaded with respectively spring, described servo upper valve core, lower servo spool coordinates upper with described valve sleeve, cavity between lower servo valve seat is divided into the air chamber of giving vent to anger successively, exhaust air chamber and air inlet air chamber, the described air chamber of giving vent to anger is connected by the air flue of being located in relay valve body with air inlet air chamber, on described, in servo spool and lower servo spool, vertically offer respectively the exhaust hole that is communicated with exhaust air chamber, in valve sleeve and relay valve body, be also provided with the exhaust passage that is communicated with exhaust air chamber and exhausr port, relay piston bottom surface convexes with the convex platform being sealed and matched through servo valve seat on described and upper servo spool end face down on described, the external diameter of this convex platform is less than servo valve seat bore and is greater than the internal diameter of exhaust hole in servo spool, convex with the lower bulge coordinating with lower servo spool sealing bottom surface through described lower servo valve seat at the end face of lower relay piston, the external diameter of this lower bulge is less than lower servo valve seat bore and is greater than the internal diameter of lower relay valve in-core exhaust hole.