CN204161347U - A kind of intelligent Air Cut Valve - Google Patents

Abstract

The utility model discloses a kind of intelligent Air Cut Valve, it is arranged with priority valve and main valve dying in valve body, guide piston is provided with in priority valve, guide piston is connected with push rod, main valve seat, main valve plug, exhausr port and exhaust plug is provided with in main valve, main valve plug is connected with push rod, be in transmission connection by the lever transmission mechanism be connected between push rod and push rod between priority valve and main valve, exhaust plug is connected by adapter sleeve and main valve plug are concentric, in Air Cut Valve, be also provided with pressure sensor, this pressure sensor is connected with low-pressure alarming device.Intelligent Air Cut Valve structure of the present utility model is simple, easy to use, it can when car brakeing air pressure be lower than 0.55Mpa, rapid connection low pressure alarm is that chaufeur is reported to the police, and coordinate with other control for brake valve module the energy stroage spring discharged in brake cylinder simultaneously, energy stroage spring is utilized to compensate indicating brake action, ensure the driving safety performance of vehicle, avoid occurring the major traffic accidents such as personal casualty.

Description

A kind of intelligent Air Cut Valve

Technical field

The utility model relates to a kind of brake control valve of Pneumatic braking system, says accurately and relates to a kind of intelligent Air Cut Valve.

Background technology

The safety of running car and the reliability of brake system 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 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.During service brake, chaufeur controls two-chamber main brake valve by stretcher, high pressure gas in gascollecting cap cylinder are sent in each brake cylinder of the forward and backward bridge of vehicle through two-chamber main brake valve respectively, 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.During parking, close park brake 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 air, and energy stroage spring is released through push rod and drives brake wheel to realize braking during standstill.When removing parking, open park brake switch, the high pressure gas of gascollecting cap cylinder are entered in back axle brake cylinder by park brake switch, the pressure compressed energy-storage spring utilizing high pressure gas to produce, drive in pusher retracted brake cylinder, the braking effect of back axle brake cylinder is removed.In a particular application, for preventing because of the excessive damage drg of braking force and linkage part in vehicle travel process, the spring energy-storage braking in holding brake device and the main compression air brake in service braking device are forbidden overlapping and are used.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 freeze blocking, system element ponding of cryogenic system pipeline ponding unavoidably to freeze the fault such as hair fastener, the gas leakage of high/low temperature system failure, car brakeing air pressure is easily caused to reduce, when braking pressure is lower than 0.55Mpa, car brakeing can be caused malfunctioning, thus cause major motor vehicle safety misadventure, therefore there is larger potential safety hazard in existing Pneumatic braking system.

Utility model content

The purpose of this utility model is: provide a kind of intelligent Air Cut Valve, this intelligent Air Cut Valve coordinate with other brake assemblies can when 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.

The technical solution of the utility model is: a kind of intelligent Air Cut Valve, comprise valve body of dying, be arranged with priority valve and main valve dying in valve body, be in transmission connection by lever transmission mechanism between this priority valve and main valve, described priority valve comprises the guide's valve pocket be located in valve body, the arrival end of this guide's valve pocket communicates with the admission port that valve body is arranged, the exit end of this guide's valve pocket is communicated with the arrival end of main valve by the free air diffuser in valve body, vertically seal slidable fit on the top of this guide's valve pocket and have guide piston, the bottom surface of this guide piston is the load bearing face connecting admission port and free air diffuser, push rod is fixed with in the upper end of this guide piston, the input end of upper surface and described lever transmission mechanism that the end of push rod passes valve body of dying is in transmission connection, main valve comprises the main valve chamber be located in valve body, be located at the main valve seat between main valve chamber and free air diffuser and be located at the main valve plug be sealed and matched by top pressure spring and described main valve seat in main valve chamber, the arrival end of this main valve chamber is communicated with described free air diffuser by main valve seat, the exit end of this main valve chamber is communicated with the air extractor duct that valve body is arranged by outlet passageway, the push rod upwards extended is fixed with on the top of described main valve plug, the slide mouth of the upper surface and described lever transmission mechanism that pass valve body of dying of this push rod seal is in transmission connection, also exhausr port is provided with in the bottom of described main valve chamber, to be connected with when opening or close main valve close synchronously in the bottom of described main valve plug with one heart by adapter sleeve or to open the exhaust plug of this exhausr port, pressure sensor is connected with in the side of main valve chamber, this pressure sensor is connected with low-pressure alarming device.

Described leverage comprises active laver assembly and the passive lever assembly of transmission cooperation, described active laver assembly comprises the lever support be located in push rod end and the active laver being arranged in lever support, described passive lever assembly comprises spring and sticks up seat and be located at spring and stick up passive lever on seat, spacing cooperation is pressed by the top permanent seat top with valve body of dying is arranged in one end of described active laver, the input end top that its other end and described spring stick up seat presses transmission to coordinate, described passive lever is fixedly mounted on spring and sticks up on the mouth of seat, spacing cooperation is pressed by top and described permanent seat top in its one end, its other end and described push rod top are pressed and are in transmission connection.

Described spring sticks up seat primarily of cylindrical spring and the power input spring perch and the Power output spring perch composition that are separately fixed at cylindrical spring two ends, described power input spring perch is connected with active laver, described Power output spring perch rotates and is assemblied on permanent seat, and described passive lever and this spring stick up between seat and be obliquely installed.

Also comprise main air pressure adjusting mechanism and assist gas pressure adjusting mechanism, described main air pressure adjusting mechanism comprises the adjusting pole be installed on described permanent seat, the adjustment screw of spinning on adjusting pole and top are contained in the pressure spring between adjustment screw and lever support, described assist gas pressure adjusting mechanism comprises sealing and is slidably mounted on the adjustment piston of dying in valve body, this adjustment piston is positioned at below described guide piston, the upper end of this adjustment piston contacts with the bottom of guide piston and coordinates, valve body of dying below adjustment piston is provided with auxiliary adjusting seat, auxiliary adjusting seat is installed with auxiliary adjustment screw, auxiliary adjustment spring is top-loaded with between auxiliary adjustment screw and adjustment piston.

Described exhaust plug sealing is slidably mounted in adapter sleeve, and the bottom of this exhaust plug coordinates with adapter sleeve end opening limit block, in adapter sleeve, be top-loaded with spring bottom main valve plug and between exhaust plug top.

Intelligent Air Cut Valve of the present utility model is when car brakeing air pressure is normal, open main valve by guide piston gas and leverage and make normal open between the admission port of intelligent Air Cut Valve and air extractor duct, guarantee that the Pneumatic braking system of vehicle normally works, when occurring in driving process that cryogenic system pipeline ponding freezes blocking, system element ponding freezes hair fastener, faults such as high/low temperature system failure gas leakage and when causing brake system air pressure lower than 0.55Mpa, it is that chaufeur is reported to the police that this intelligent Air Cut Valve can connect rapidly low pressure alarm by pressure sensor, close main valve rapidly simultaneously, thus control relay valve with main brake valve and anti-malfunctioning three and coordinate the high pressure gas being used for removing parking in brake cylinder bleeder brake air chamber are discharged into the atmosphere, the energy stroage spring in brake cylinder is made to participate in service brake, actv. compensates indicating brake action, ensure the driving safety performance of vehicle, avoid occurring the major traffic accidents such as personal casualty, intelligent Air Cut Valve of the present utility model is simple to operate, easy to use, safe and reliable, solve existing vehicle in infrabar or the problem that there will be braking failure without air pressure, there is good Social benefit and economic benefit, be suitable at various lorry, passenger vehicle is installed and used.

Accompanying drawing explanation

Fig. 1 is the structural representation of the anti-malfunctioning vehicle air brake system that the utility model adopts;

Fig. 2 is the structural representation of anti-failure brake master valve in Fig. 1;

Fig. 3 is the structural representation of anti-malfunctioning three control relay valves in Fig. 1;

Fig. 4 is the structural representation of the utility model intelligence Air Cut Valve.

Detailed description of the invention

As shown in Figure 1, it forms primarily of air compressor 1, air filter 2, four-loop protection valve 3, high-pressure gas cylinder 4, brake pedal 5, anti-failure brake master 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, anti-malfunctioning three control relay valves 15 and low pressure alarm 16 and air-pressure gauge 17 specific embodiment of anti-malfunctioning vehicle air brake system of the present utility model.

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

Anti-malfunctioning three control relay valves as shown in Figure 3, it comprises relay valve body 60, the upper relay piston 61 of upper and lower and lower relay piston 65 is slidably mounted on every being provided with upper chamber by sealing respectively in relay valve body 60, valve pocket and lower chamber, offer at the top of relay valve body 60 be communicated with upper chamber first control admission port 63, double-way check valve is provided with in the bottom of relay valve body 60, two imports of this double-way check valve are respectively the second control admission port 68 and the 3rd be arranged on relative body wall and control admission port 69, the outlet of this double-way check valve is communicated with lower chamber, be slidably fitted with in double-way check valve and control admission port 68 or the 3rd and control for controlling its outlet and second sliding valve core 70 that admission port 69 is communicated with.Vertically on the middle part sidewall of relay valve body 60 be interval with air extractor duct 77 and lower admission port 78 and the exhausr port (depending on not going out in figure) being connected air, 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 chamber wall in the middle part of valve pocket, 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, spring is top-loaded with respectively at valve sleeve 74 and between upper servo spool 75 and lower servo spool 80.Upper servo spool 75, lower servo spool 80 coordinates the air chamber of the giving vent to anger cavity between upper servo valve seat 72 and lower servo valve seat 73 being divided into successively top with valve sleeve 74, the exhaust air chamber at middle part and the air inlet air chamber of bottom, wherein, air chamber of giving vent to anger is connected by the interface channel 80 be located in relay valve body with air inlet air chamber, simultaneously, the upper exhaust bore 76 of servo valve seat 72 and exhaust air chamber in connection is vertically offered in upper servo spool 75, the lower exhaust hole 81 of servo valve seat 73 and exhaust air chamber under connection is vertically offered in lower servo spool 80, the exhaust passage 79 being communicated with exhaust air chamber and exhausr port is also provided with in valve sleeve 74 with relay valve body 60.The bottom surface of upper relay piston 61 be convexly equipped with down through on servo valve seat 72 convex platform 64 be sealed and matched with upper servo spool 75 end face, the external diameter of this convex platform 64 is less than servo valve seat 72 internal diameter and is greater than the internal diameter of upper exhaust hole 76 in servo spool 75, be convexly equipped with through lower servo valve seat 73 at the end face of lower relay piston 65 and the lower bulge 66 coordinated with lower servo spool 80 sealing bottom surface, 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 descending exhaust hole 81 in lower servo spool 80.

As shown in Figure 4, it comprises 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 valve body 83 of dying.Wherein, priority valve comprises the guide's valve pocket be located at and died in valve body 83, the arrival end of this guide's valve pocket communicates with the admission port 84 that valve body 83 of dying is arranged, 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 seal slidable fit on the top of this guide's valve pocket and have guide piston 86, the bottom surface of this guide piston 86 is the load bearing face connecting admission port 84 and free air diffuser 99, push rod 87 is fixed with one heart in the upper end of this guide piston 86, 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 the main valve chamber be located at and died in valve body 83, be located at the main valve seat between main valve chamber with free air diffuser 99 and be located in main valve chamber by the corresponding main valve plug 101 be sealed and matched 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 the air extractor duct that valve body is arranged (depending on not going out in figure) by outlet passageway 102, the push rod 100 be 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.The exhausr port 105 connecting air is also provided with in the bottom of main valve chamber, noise elimination sieve 106 is provided with outside exhausr port 105, adapter sleeve 103 is fixed with one heart in the bottom of main valve plug 101, be slidably fitted with in adapter sleeve 103 and the exhaust plug 104 for opening and closing exhausr port 105, this exhaust plug 104 coordinates with limit block bottom adapter sleeve 103, between main valve plug 101 and exhaust plug 104, spring is top-loaded with in adapter sleeve 103, it is when main valve plug 101 is opened or closed main valve, and exhaust plug 104 can close synchronously or unlatching exhausr port 105.Leverage comprises active laver assembly and the passive lever assembly of transmission cooperation, wherein, active laver assembly comprises the lever support 88 be located in push rod 87 end and the active laver 89 be arranged in lever support 88, relatively in lever support 88 be convexly equipped with the fin being clamped in active laver about 89 both sides for a pair, this fin forms the fulcrum of active laver 89.Passive lever assembly comprises spring and sticks up seat and be located at spring and stick up passive lever 96 on seat, spring stick up seat primarily of cylindrical spring 93 and be separately fixed at cylindrical spring 93 two ends power input spring perch 94 and Power output spring perch 95 form, Power output spring perch 95 rotates and is assemblied on permanent seat 90 that relay valve body 83 top sets firmly, what passive lever 96 tilted is fixedly mounted on Power output spring perch 95, one end of active laver 89 by top with permanent seat 90 spacing top force fit, the other end of active laver 89 inputs spring perch 94 by the top power stuck up in seat with spring and pushes up and press transmission to coordinate, spacing cooperation is pressed by top to push up with permanent seat 90 in one end of passive lever, the other end of passive lever 96 and push rod 100 push up pressure and are in transmission connection, permanent seat 90 is positioned at above passive lever 96 and is also fixed with locating dowel pin 97.When guide piston 86 is up by gas pressure, push rod 87 drives active laver 89 upwards to swing by lever support 88, active laver 89 drives power to input spring perch 94 and is upturned, under cylindrical spring 93 acts on, spring sticks up seat and swings, Power output spring perch 95 rotates thus makes passive lever 96 swing by push rod 100 downwards and makes main valve plug 101 descending, opens main valve.Intelligent Air Cut Valve is also provided with main air pressure adjusting mechanism and assist gas pressure adjusting mechanism, wherein, main air pressure adjusting mechanism comprises adjustment screw 91 on adjusting pole of the adjusting pole be installed on permanent seat 90, spinning and top and is contained in pressure spring 92 between adjustment screw 91 and lever support 88.Assist gas pressure adjusting mechanism comprises sealing and 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 with the bottom of guide piston 86 and coordinates, valve body 83 of dying below adjustment piston 109 is provided with auxiliary adjusting seat, auxiliary adjusting seat is installed with auxiliary adjustment screw 108, auxiliary adjustment spring 110 is top-loaded with between auxiliary adjustment screw 108 and adjustment piston 109, in addition, valve body 83 is 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 bottom of dying, also be provided with communication seals cover 98 dying in valve body 83, the air pressure balance duct 107 of auxiliary adjusting seat and exhausr port.Be connected with pressure sensor 111 in the side of main valve chamber, this pressure sensor 111 is connected with low pressure alarm 16.

Air compressor 1 in anti-malfunctioning vehicle air brake system of the present utility model, 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 etc. is prior art, wherein, at manual parking valve 8, propons single control relay valve 9, back axle single control relay valve 12 is equipped with the exhausr port connecting air, inflation compressed air brake cylinder is equipped with in propons brake cylinder 10 and back axle brake cylinder 13, bleeder brake air chamber (energy stroage spring air chamber) is also provided with in back axle brake cylinder 13.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 in anti-failure brake master valve 6 and back axle admission port 42, the admission port 84 of intelligence Air Cut Valve 7, lower admission port 78 and the propons single control relay valve 9 of anti-malfunctioning three control relay valves 15 are connected with high-pressure gas cylinder 4 respectively by pipeline with the admission port of back axle single control relay valve 12, the propons air extractor duct 43 of anti-failure brake master valve 6 is connected respectively by pipeline is corresponding with the control gas port on propons single control relay valve 9 and back axle single control relay valve 12 with back axle air extractor duct 28, 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 the 3rd of relay valve 15 by pipeline branch road and anti-malfunctioning three and is controlled admission port 69 and be connected, the anti-malfunctioning control admission port 52 of anti-failure brake master valve 6 is connected by pipeline with the air extractor duct of intelligent Air Cut Valve 7, anti-malfunctioning control air extractor duct 47 in anti-failure brake master valve 6 is controlled first on relay valve 15 by pipeline and anti-malfunctioning three and is controlled admission port 63 and be connected, the air extractor duct of manual parking valve 8 by pipeline with prevent that malfunctioning three control second of relay valve 15 and control admission port 68 and be connected, the upper air extractor duct 77 of anti-malfunctioning three control relay valves 15 is connected with the bleeder brake air chamber of back axle brake cylinder 13 by pipeline.

When the system pressure in vehicle air brake 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, promoted by leverage that main valve plug 101 is descending opens air extractor duct and close exhausr port 105, make this intelligent Air Cut Valve 7 be in normally open, high pressure gas are sent in the anti-malfunctioning control admission port 52 of anti-failure brake master valve 6 through intelligent Air Cut Valve 7, the back axle that another road air pressure enters anti-failure brake master valve 6 controls admission port 27 and passes into lower valve chamber respectively through the passage 56 be located in its valve body, anti-malfunctioning control air extractor duct 47 is with in anti-malfunctioning balance air chamber, make lower piston overlap 51 under lower balance spring 55 acts on move and withstand on lower valve base 45 bottom surface, middle piston 48 moves down, reduce the gap between bottom spool 46 and lower valve base 45, lower piston 50 moves down the distance between increase and drive link 36, simultaneously, by pipeline, high pressure gas being sent into first of 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.When removing parking, manual parking valve 8 is pulled to traveling position, high pressure gas enter second of anti-malfunctioning three control relay valves 15 through manual parking valve 8 and control admission ports 68 and enter in lower chamber that to promote lower relay piston 65 up, promote sliding valve core 70 to move to right, closedown the 3rd control admission port 69 is communicated with lower chamber simultaneously.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, make high pressure gas from lower admission port 78 and enter in the bleeder brake air chamber of back axle brake cylinder 13 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.When braking in normal driving process, step on brake pedal 5, the tip-lever support 24 that brake pedal 5 promotes anti-failure brake master 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 by the upper valve core of bottom drive boss 22 drive drive link 36 and upper valve core 30 descending, make back axle control admission port 27 to be communicated with back axle control air extractor duct 28, 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 through back axle single control relay valve 12 and to promote pipe link drives rear axle brake vi 14 to realize back axle braking.Upper valve core contacts with drive link 36 end sealing after driving boss 22 descending, closes upper valve body exhaust passage.In driving boss 37 to promote by middle spool while drive link 36 is descending, spool 40 is descending, make propons control admission port 42 control air extractor duct 43 with propons to be communicated with, open propons single control relay valve 9, high pressure gas enter in the inflation compressed air brake cylinder of propons brake cylinder 10 through propons single control relay valve 9 and drive propons drg 11 to realize propons braking by pipe link.The vent closure that middle spool driving boss 37 and middle spool 40 will its sidewall start while sealing and contacting.When service brake occurs that system gas forces down in 0.55Mpa, intelligence Air Cut Valve 7 is closed, simultaneously, pressure sensor 111 connects low pressure alarm 16 for chaufeur warning, anti-malfunctioning control admission port 52 in anti-failure brake master valve 6 is died, lower piston 50 is up under lower piston support spring 54 acts on to be contacted with drive link 36 bottom surface, brake pedal 5 is floored by chaufeur, drive link 36 promotes lower piston 50 and drives lower piston to overlap 51 by lower spring cover for seat 53, middle piston 48 is descending, bottom spool 46 is descending closedown lower valve base 45 under the action of the spring, first control admission port 63 of anti-malfunctioning control air extractor duct 47 and anti-malfunctioning three control relay valves 15 is 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 anti-malfunctioning three control relay valves 15 closes closes relay valve seat 72, simultaneously, the upper hole 76 of pressure gas in back axle brake cylinder 13 in upper air extractor duct 77 and upper servo spool 75 and exhaust passage 79 enter air from exhausr port, energy stroage spring release in back axle brake cylinder 13, back axle indicating brake action is compensated, improve back axle deceleration and stopping performance.

Claims (5)

1. an intelligent Air Cut Valve, it is characterized in that, comprise valve body of dying, be arranged with priority valve and main valve dying in valve body, be in transmission connection by lever transmission mechanism between this priority valve and main valve, described priority valve comprises the guide's valve pocket be located in valve body, the arrival end of this guide's valve pocket communicates with the admission port that valve body is arranged, the exit end of this guide's valve pocket is communicated with the arrival end of main valve by the free air diffuser in valve body, vertically seal slidable fit on the top of this guide's valve pocket and have guide piston, the bottom surface of this guide piston is the load bearing face connecting admission port and free air diffuser, push rod is fixed with in the upper end of this guide piston, the input end of upper surface and described lever transmission mechanism that the end of push rod passes valve body of dying is in transmission connection, main valve comprises the main valve chamber be located in valve body, be located at the main valve seat between main valve chamber and free air diffuser and be located at the main valve plug be sealed and matched by top pressure spring and described main valve seat in main valve chamber, the arrival end of this main valve chamber is communicated with described free air diffuser by main valve seat, the exit end of this main valve chamber is communicated with the air extractor duct that valve body is arranged by outlet passageway, the push rod upwards extended is fixed with on the top of described main valve plug, the slide mouth of the upper surface and described lever transmission mechanism that pass valve body of dying of this push rod seal is in transmission connection, also exhausr port is provided with in the bottom of described main valve chamber, to be connected with when opening or close main valve close synchronously in the bottom of described main valve plug with one heart by adapter sleeve or to open the exhaust plug of this exhausr port, pressure sensor is connected with in the side of main valve chamber, this pressure sensor is connected with low-pressure alarming device.

2. intelligent Air Cut Valve according to claim 1, it is characterized in that, described leverage comprises active laver assembly and the passive lever assembly of transmission cooperation, described active laver assembly comprises the lever support be located in push rod end and the active laver being arranged in lever support, described passive lever assembly comprises spring and sticks up seat and be located at spring and stick up passive lever on seat, spacing cooperation is pressed by the top permanent seat top with valve body of dying is arranged in one end of described active laver, the input end top that its other end and described spring stick up seat presses transmission to coordinate, described passive lever is fixedly mounted on spring and sticks up on the mouth of seat, spacing cooperation is pressed by top and described permanent seat top in its one end, its other end and described push rod top are pressed and are in transmission connection.

3. intelligent Air Cut Valve according to claim 2, it is characterized in that, described spring sticks up seat primarily of cylindrical spring and the power input spring perch and the Power output spring perch composition that are separately fixed at cylindrical spring two ends, described power input spring perch is connected with active laver, described Power output spring perch rotates and is assemblied on permanent seat, and described passive lever and this spring stick up between seat and be obliquely installed.

4. intelligent Air Cut Valve according to claim 1, it is characterized in that, also comprise main air pressure adjusting mechanism and assist gas pressure adjusting mechanism, described main air pressure adjusting mechanism comprises the adjusting pole be installed on described permanent seat, the adjustment screw of spinning on adjusting pole and top are contained in the pressure spring between adjustment screw and lever support, described assist gas pressure adjusting mechanism comprises sealing and is slidably mounted on the adjustment piston of dying in valve body, this adjustment piston is positioned at below described guide piston, the upper end of this adjustment piston contacts with the bottom of guide piston and coordinates, valve body of dying below adjustment piston is provided with auxiliary adjusting seat, auxiliary adjusting seat is installed with auxiliary adjustment screw, auxiliary adjustment spring is top-loaded with between auxiliary adjustment screw and adjustment piston.

5. intelligent Air Cut Valve according to claim 1, it is characterized in that, described exhaust plug sealing is slidably mounted in adapter sleeve, and the bottom of this exhaust plug coordinates with adapter sleeve end opening limit block, in adapter sleeve, be top-loaded with spring bottom main valve plug and between exhaust plug top.