CN108622061A - It extenuates and ensures valve and Pneumatic braking system - Google Patents
It extenuates and ensures valve and Pneumatic braking system Download PDFInfo
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- CN108622061A CN108622061A CN201810688448.5A CN201810688448A CN108622061A CN 108622061 A CN108622061 A CN 108622061A CN 201810688448 A CN201810688448 A CN 201810688448A CN 108622061 A CN108622061 A CN 108622061A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
- B60T15/184—Railway control or brake valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Safety Valves (AREA)
Abstract
Provided by the invention extenuate ensures valve and Pneumatic braking system, is related to air-pressure brake technical field.This, which is extenuated, ensures that valve includes the first control valve and the second control valve.First cavity is connected to train pipe, and the second cavity is connected with acceleration and extenuates cylinder and auxiliary reservoir.Third cavity and atmosphere, the 4th cavity are connected to checking cylinder；And the 4th cavity selectively with atmosphere.Second cavity is connect with the 4th cavity, and the first spool is mobile so that the gas in auxiliary reservoir can selectively reach in the second cavity, the second spool it is mobile so that gas in the 4th cavity can selectively with atmosphere.This, which is extenuated, ensures that valve can be when control bound breaks down, it is ensured that the pressure in checking cylinder is extenuated so that Pneumatic braking system works normally, and improves the safety and stability of Pneumatic braking system.
Description
Technical field
The present invention relates to air-pressure brake technical fields, are extenuated in particular to one kind and ensureing valve and Pneumatic braking system.
Background technology
In train Pneumatic braking system, if control bound breaks down, when checking cylinder needs to alleviate, due to control
Main valve failure causes train pipe and auxiliary reservoir pressure difference too small, is not enough to set actuation gear to alleviating position.Therefore so that checking cylinder is not
It can be communicated with air, checking cylinder is not alleviated, and vehicle internal contracting brake will be caused.
In view of this, the application, which has designed and manufactured one kind, extenuating guarantee valve, it can be ensured that the pressure of checking cylinder is delayed
Subtract, avoid vehicle internal contracting brake, is the technical issues of being badly in need of improving in current air-pressure brake technical field.
Invention content
The purpose of the present invention includes providing one kind extenuating guarantee valve, including the first control valve and the second control valve.Work as control
After main valve breaks down, it can ensure that the pressure in checking cylinder is extenuated, it is ensured that vehicle normal operation improves entire braking system
Safety and stability.
The purpose of the present invention further includes providing a kind of Pneumatic braking system, including control bound and above-mentioned extenuate guarantee
Valve, after control bound breaks down, which can be such that checking cylinder smoothly extenuates after braking, prevent vehicle from embracing
Lock, it is ensured that the normal operation of entire braking system, safe, stability is good.
The present invention improves its technical problem using technical solution below to realize.
One kind provided by the invention extenuates guarantee valve, including the first control valve and the second control valve, first control valve
Including the first cavity, the second cavity and the first spool in second cavity, second control valve includes third chamber
Body, the 4th cavity and the second spool in the 4th cavity.
First cavity is connected to train pipe, and second cavity is connected with acceleration and extenuates cylinder and auxiliary reservoir；It is described
Third cavity and atmosphere, the 4th cavity are connected to checking cylinder；And the 4th cavity selectively connects with air
It is logical.
Second cavity is connect with the 4th cavity, and first spool is mobile so that gas in the auxiliary reservoir
It can selectively reach in second cavity, second spool is mobile so that the gas in the 4th cavity can selectivity
Ground and atmosphere.
Further, delay cylinder is equipped between the train pipe and first cavity.
Further, the first check valve and first segment head piece are equipped between the delay cylinder and the train pipe, it is described
First check valve makes the gas in the delay cylinder enter the train pipe；First check valve and the first segment head piece
It is arranged in parallel.
Further, second cavity and the acceleration are equipped with the second check valve and the second throttling between extenuating cylinder
Mouthful, second check valve makes the acceleration extenuate the gas in cylinder and enters second cavity；Second check valve and
Second restriction is arranged in parallel.
Further, third check valve and third restriction are equipped between the 4th cavity and the checking cylinder, it is described
Third check valve makes the gas in the 4th cavity enter the checking cylinder；The third check valve and the third restriction
It is arranged in parallel.
Further, the pressure for accelerating the pressure for extenuating cylinder to be more than the train pipe, and wind is extenuated in the acceleration
When the pressure difference of cylinder and the train pipe reaches the first preset value, first spool is moved to first cavity, the pair
Gas in cylinder is blocked by first spool, can not reach the 4th cavity.
Further, first preset value is 10kPa to 20kPa.
Further, the brake-cylinder pressure reaches the second preset value, and second spool is moved to the third cavity,
4th cavity and atmosphere；Meanwhile second cavity is connected to the 4th cavity, and pressure reduces, and described first
Spool is moved to second cavity, and the gas in the auxiliary reservoir enters in second cavity.
Further, second preset value is 50kPa to 70kPa.
A kind of Pneumatic braking system provided by the invention, including control bound and it is above-mentioned extenuate guarantee valve, it is described to extenuate
Ensure that valve is connected to the control bound；After the control bound breaks down, described extenuate ensures that valve can make the braking
Cylinder and atmosphere realize decompression.
Provided by the invention extenuate ensures that valve and Pneumatic braking system have the following aspects
Advantageous effect：
It is provided by the invention to extenuate guarantee valve, including the first control valve and the second control valve, the first control valve be separately connected
There is train pipe, alleviation cylinder and auxiliary reservoir, the second control valve is accelerated to be connected separately with checking cylinder and air, and the first control valve
It is connected with the second control valve.If control bound breaks down so that the pressure in checking cylinder cannot extenuate, and alleviate protect at this time
Card valve can occur disposition action, be discharged auxiliary reservoir in portion of air, reduce auxiliary reservoir in pressure, to make train pipe with
Auxiliary reservoir pressure difference increase, so that checking cylinder is alleviated by the pressure difference for establishing enough, avoid vehicle internal contracting brake, improve vehicle safety and
Stability.
Pneumatic braking system provided by the invention, including control bound and above-mentioned release insuring valve, when control bound goes out
After existing failure, which can be such that checking cylinder smoothly extenuates after braking, prevent vehicle internal contracting brake, it is ensured that entire braking
The normal operation of system, safe, stability is good.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of application scenarios structural schematic diagram for extenuating guarantee valve that the specific embodiment of the invention provides；
The application scenarios structural schematic diagram of Fig. 2 main valves in order to control；
Fig. 3 is the structural schematic diagram for extenuating the original state for ensureing valve that the specific embodiment of the invention provides；
Fig. 4 is the structural schematic diagram for extenuating the first service state for ensureing valve that the specific embodiment of the invention provides；
Fig. 5 is the structural schematic diagram for extenuating the braking latter stage state for ensureing valve that the specific embodiment of the invention provides；
Fig. 6 is the structural schematic diagram for extenuating the first relieved state for ensureing valve that the specific embodiment of the invention provides；
Fig. 7 is the structural schematic diagram for extenuating the alleviation latter stage state for ensureing valve that the specific embodiment of the invention provides；
Fig. 8 extenuates guarantee valve under control bound abnormal conditions for what the specific embodiment of the invention provided, first relieved state
Structural schematic diagram；
Fig. 9 extenuates guarantee valve under control bound abnormal conditions for what the specific embodiment of the invention provided, alleviates mid-term shape
The structural schematic diagram of state.
Icon：The first control valves of 110-；The first cavitys of 111-；The second cavitys of 113-；The first spools of 115-；The first films of 117-
Plate；The first springs of 119-；The second control valves of 130-；131- third cavitys；The 4th cavitys of 133-；The second spools of 135-；137-
Two diaphragm plates；139- second springs；150- train pipes；151- first segment head pieces；The first check valves of 153-；155- delay cylinders；
Cylinder is extenuated in 160- acceleration；The second check valves of 161-；The second restrictions of 163-；170- auxiliary reservoirs；The 4th restrictions of 171-；180-
Checking cylinder；181- third check valves；183- third restrictions；101- control bounds.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it is to be understood that, the orientation or positional relationship of the instructions such as term "upper", "lower" is base
In orientation or positional relationship shown in the drawings, or product of the present invention using when the orientation or positional relationship usually put, or
Person is the orientation or positional relationship that those skilled in the art usually understand, is merely for convenience of description of the present invention and simplification of the description,
It does not indicate or imply the indicated equipment or element must have a particular orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
" first ", " second " etc. of the present invention, is only used to distinguish between description, has no special meaning.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；Can be
It is connected directly, it can also be indirectly connected through an intermediary.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
Fig. 1 is a kind of application scenarios structural schematic diagram for extenuating guarantee valve that the specific embodiment of the invention provides, and is please referred to
Fig. 1.
It is provided in this embodiment to extenuate guarantee valve, including the first control valve 110 and the second control valve 130, the first control valve
110 include the first cavity 111, the second cavity 113 and the first spool 115 in the second cavity 113, the second control valve 130
Including third cavity 131, the 4th cavity 133 and the second spool 135 in the 4th cavity 133.
First cavity 111 is connected to train pipe 150, and the second cavity 113 is connected with acceleration and extenuates cylinder 160 and auxiliary reservoir
170.Third cavity 131 and atmosphere, the 4th cavity 133 are connected to checking cylinder 180.And the 4th cavity 133 is selectively
With atmosphere.
Second cavity 113 is connect with the 4th cavity 133, and the first spool 115 moves so that the gas in auxiliary reservoir 170 can select
Reach to selecting property in the second cavity 113, the second spool 135 move so that gas in the 4th cavity 133 can selectively with greatly
Gas is connected to.
In the present embodiment, the first cavity 111 and the second cavity 113 are separated by the first diaphragm plate 117, the first cavity 111
It is inside additionally provided with the first spring 119, the first spring 119 is fixedly mounted on the first diaphragm plate 117.First diaphragm plate 117 is mounted on first
The end of spool 115, the movement of the first spool 115 drive the movement of the first diaphragm plate 117, stretch or compress the first spring 119.Similarly,
Third cavity 131 and the 4th cavity 133 are separated by the second diaphragm plate 137, and second spring 139 is additionally provided in third cavity 131, the
Two springs 139 are fixedly mounted on the second diaphragm plate 137.Second diaphragm plate 137 is mounted on the end of the second spool 135, the second spool
135 movements drive the movement of the second diaphragm plate 137, stretch or compress second spring 139.
Specifically, delay cylinder 155 is equipped between train pipe 150 and the first cavity 111.Delay cylinder 155 is for making the
One control valve, 110 delayed start-up.It is delayed between cylinder 155 and train pipe 150 and is equipped with the first check valve 153 and first segment head piece
151, the first check valve 153 makes the gas in delay cylinder 155 enter train pipe 150.First check valve 153 and first segment head piece
151 are arranged in parallel.
When the pressure being delayed in cylinder 155 is more than the pressure in train pipe 150, the gas that is delayed in cylinder 155 is from the
One check valve 153 flows in train pipe 150.When the pressure being delayed in cylinder 155 is less than the pressure in train pipe 150, train
Gas in pipe 150 is flowed to from first segment head piece 151 in delay cylinder 155.
Second cavity 113 and acceleration extenuate and are equipped with the second check valve 161 and the second restriction 163 between cylinder 160, and second
Check valve 161 makes acceleration extenuate the gas in cylinder 160 and enters the second cavity 113；Second check valve 161 and the second restriction
163 are arranged in parallel.
When the pressure in the second cavity 113, which is more than, to be accelerated to extenuate the pressure in cylinder 160, the gas in the second cavity 113
Body accelerates to extenuate in cylinder 160 from the second restriction 163 flow direction.Accelerate to extenuate cylinder when the pressure in the second cavity 113 is less than
When pressure in 160, the gas extenuated in cylinder 160 is accelerated to be flowed in the second cavity 113 from the second check valve 161.
Third check valve 181 and third restriction 183, third check valve are equipped between 4th cavity 133 and checking cylinder 180
181 make the gas in the 4th cavity 133 enter checking cylinder 180；Third check valve 181 and third restriction 183 are arranged in parallel.
When the pressure in the 4th cavity 133 is more than the pressure in checking cylinder 180, the gas in the 4th cavity 133 passes through
Third check valve 181 enters in checking cylinder 180.When the pressure in the 4th cavity 133 is less than the pressure in checking cylinder 180, system
Gas in dynamic cylinder 180 is entered by third restriction 183 in the 4th cavity 133.
The 4th restriction 171 is equipped between auxiliary reservoir 170 and the first control valve 110, the 4th restriction 171 is for limiting pair
The exhaust air rate of cylinder 170.
Second cavity 113 is connected to the 4th cavity 133, forms an exhaust channel of auxiliary reservoir 170.That is auxiliary reservoir
Gas in 170 after the first control valve 110, the second control valve 130 with atmosphere.Only when the first control valve 110 and
After two control valves 130 are opened, the gas in auxiliary reservoir 170 could be discharged.
The application scenarios structural schematic diagram of Fig. 2 main valves 101 in order to control, please refers to Fig. 2.
Actuation gear in control bound 101 acts according to train pipe 150 with 170 pressure dependence of auxiliary reservoir：
When vehicle braking, train pipe 150 depressurizes, and 170 pressure of auxiliary reservoir is more than 150 pressure of train pipe, and actuation gear is placed in
Retarder location, checking cylinder 180 fill wind, obtain brake pressure.When vehicle is alleviated, train pipe 150 boosts, and 150 pressure of train pipe is more than
170 pressure of auxiliary reservoir, actuation gear are placed in alleviating position, and checking cylinder 180 is communicated with air, and checking cylinder 180 is alleviated.
When alleviation, if control bound 101 breaks down, train pipe 150 is caused to be insufficient to allow work with 170 pressure difference of auxiliary reservoir
It is placed in alleviating position with mechanism, then checking cylinder 180 cannot be communicated with air, and checking cylinder 180 is not alleviated, and will cause vehicle internal contracting brake.
Under this operating mode, release insuring valve is acted disposition occurs, and exhausts the air in a part of auxiliary reservoir 170, reduces auxiliary reservoir 170
Pressure makes train pipe 150 be increased with 170 pressure difference of auxiliary reservoir, establishes enough pressure differences and ensures that the actuation gear of control bound 101 sets
Alleviating position, to make checking cylinder 180 alleviate.
Specifically, the first control valve 110 according to the on-position of vehicle break-make：
When the pressure for accelerating the pressure for extenuating cylinder 160 to be more than train pipe 150, and accelerate to extenuate cylinder 160 and train pipe
When 150 pressure difference reaches the first preset value, the action of the first control valve 110.First spool 115 is moved to the first cavity 111, i.e.,
First spool 115 moves up.After first spool 115 moves up, the first control valve 110 is closed.I.e. the exhaust channel of auxiliary reservoir 170 is hindered
Disconnected, the gas in auxiliary reservoir 170 can not be discharged.
Optionally, the first preset value is 10kPa to 20kPa.Preferably, in the present embodiment, when the first preset value is
When 15kPa, the action of the first control valve 110.
Second control valve 130 break-make according to the pressure of checking cylinder 180：
When 180 pressure of checking cylinder is more than the second preset value, the action of the second control valve 130.Second spool 135 is to third cavity
131 movements, i.e., the second spool 135 moves up, and the second control valve 130 is opened, and the exhaust channel of auxiliary reservoir 170 is in the second control valve
It is opened at 130.Simultaneously as the second cavity 113 is connected to the 4th cavity 133, the pressure of the second cavity 113 reduces, the first valve
Core 115 is moved to the second cavity 113, and the first spool 115 moves down, and the gas in auxiliary reservoir 170 enters in the second cavity 113, the
One control valve 110 is opened, and the exhaust channel of auxiliary reservoir 170 is opened at the first control valve 110.Gas in auxiliary reservoir 170 can
With discharge, 170 pressure of auxiliary reservoir reduces.
Optionally, the second preset value is 50kPa to 70kPa.Preferably, in the present embodiment, when the first preset value is
When 50kPa, the action of the second control valve 130.
It is provided by the invention to extenuate guarantee valve, alleviate process and operation principle is as follows：
First, under original state, as shown in figure 3,130 no pressure air of the first control valve 110 and the second control valve,
Under the effect of one spring 119, the first control valve 110 is opened.Under the effect of second spring 139, the second control valve 130 is closed.
Second, train pipe 150 is pressurized to level pressure state, and the pressure in train pipe 150 extenuates the pressure in cylinder 160 with acceleration
Power is suitable, and the first control valve 110 is opened, and the second control valve 130 is closed.
Third, first service state, as shown in figure 4, train pipe 150 depressurizes.First cavity 111 in first control valve 110
Pressure air is declined rapidly by the first check valve 153, and the pressure of the second cavity 113 and acceleration alleviate cylinder pressure and remain fixed
Pressure, the pressure of the second cavity 113 are more than the pressure of the first cavity 111, and the first spool 115 moves up, and the first control valve 110 is closed.
First service state, the pressure in checking cylinder 180 rise, and the air in checking cylinder 180 is entered by third restriction 183
4th cavity 133 of the second control valve 130, the pressure of the 4th cavity 133 slowly rise, but not up to operating pressure, the second control
Valve processed 130 is still in closing.The purpose of third restriction 183 is to control the action of the first control valve 110 and the second control valve 130
Sequentially, if first service state, the second control valve 130 rapidly open by action, the first control valve 110 is opened also in alleviating position
State, this will misprint the pressure air in auxiliary reservoir 170, brake pressure caused to lose.
4th, latter stage is braked, as shown in figure 5, the first control valve 110 is closed.The pressure of 4th cavity 133 slowly rises,
Until reaching operating pressure, the second control valve 130 is opened.
5th, first relieved state, as shown in fig. 6, train pipe 150 is inflated, 150 pressure of train pipe rises, in train pipe 150
Gas inflated to the first cavity 111 of the first control valve 110 by first segment head piece 151, the pressure of the first cavity 111 is because of section
Stream effect slowly rises.
When control bound 101 sets alleviating position, after accelerating the pressure in alleviation cylinder to drop to 150 pressure value of train pipe, again
Rise with 150 pressure of train pipe.In the process, the pressure of the second cavity 113 of the first control valve 110 passes through the second restriction
163 alleviate cylinder pressure with acceleration slowly declines, after accelerating alleviation cylinder pressure to rise to the pressure in the second cavity 113, the
The pressure of two cavitys 113 is alleviated cylinder pressure with acceleration further through the second check valve 161 and is risen, and the first cavity during this
111 pressure is consistently less than the pressure of the second cavity 113, and the first control valve 110 is closed.
In second control valve 130, the pressure in the pressure follow checking cylinder 180 of the 4th cavity 133 declines, and is down to 50kPa
Afterwards, the second control valve 130 is closed.
6th, alleviate latter stage state, as shown in fig. 7, in the first control valve 110, the pressure of the first cavity 111 is with train pipe
150 pressure rises, when the pressure of train pipe 150 rises to less than accelerating to alleviate cylinder pressure 15kPa, the first control valve
110 open.First control valve 110 open before, the pressure of checking cylinder 180 be reduced to 50kPa hereinafter, i.e. the second control valve 130
It closes, the gas in auxiliary reservoir 170 can not be discharged.
It should be noted that the effect of delay cylinder 155 is so that the first control valve 110 is just opened after certain time-delay,
The second control valve 130 is turned off when may insure to alleviate in this way.Optionally, delay time is 40 seconds to 100 seconds, certainly, not
It is only limitted to this, delay time can be adjusted flexibly according to actual conditions.If delay time is inadequate, the second control valve 130 also in
Open position, the first control valve 110 have been opened, and will cause to misprint the pressure air in auxiliary reservoir 170.
7th, first relieved state after control bound 101 breaks down, as shown in Figure 8.Train pipe 150 is inflated, train
The pressure of pipe 150 rises, and the pressure air of train pipe 150 is inflated by first segment head piece 151 to the first cavity 111, the first chamber
For the pressure of body 111 because throttle effect slowly rises, the pressure in the second cavity 113 maintains level pressure, the first spool 115 to move up, the
One control valve 110 is closed.Since control bound 101 is abnormal, actuation gear cannot be made to set alleviating position, the pressure of checking cylinder 180 is not
It can be eased, the second spool 135 moves up, and the second control valve 130 is opened.
8th, alleviation interim status after control bound 101 breaks down, as shown in Figure 9.The pressure of first cavity 111
Power is because throttle effect slowly rises, when the pressure of the first cavity 111 rises to less than level pressure 15kPa, i.e., in train pipe 150
Pressure is moved down less than the pressure 15kPa for accelerating alleviation cylinder, the first spool 115, and the first control valve 110 is opened.At this point, the first control
110 and second control valve 130 of valve processed is opened, the pressure air discharge in auxiliary reservoir 170, and the pressure in auxiliary reservoir 170 reduces.
Alleviation latter stage state after control bound 101 breaks down, after certain pressure air is discharged in auxiliary reservoir 170,
Control bound 101 and the pressure difference of auxiliary reservoir 170 increase, and establish alleviate pressure difference quickly, actuation gear is made to be moved to alleviating position, brake
Stress reduction in cylinder 180, after the pressure in checking cylinder 180 is less than 50kPa, the second control valve 130 is closed, 170 row of auxiliary reservoir
Wind terminates.To limit the exhaust air rate of auxiliary reservoir 170, the exhaust channel of auxiliary reservoir 170 is provided with the 4th restriction 171.
A kind of Pneumatic braking system provided in this embodiment, including control bound 101 and it is above-mentioned extenuate guarantee valve, extenuate
Ensure that valve is connected to control bound 101.After control bound 101 breaks down, extenuates and ensure that valve can make checking cylinder 180 and air
Decompression is realized in connection.
In conclusion provided by the invention extenuate ensures that valve and Pneumatic braking system have the beneficial effect of the following aspects
Fruit：
Provided by the invention extenuate ensures valve and Pneumatic braking system, when the failure of control bound 101, cannot make in time
When actuation gear is placed in alleviating position, the first control valve 110 and the second control valve 130 are opened, and the pressure in auxiliary reservoir 170 is reduced,
Quickly establish the pressure difference of train pipe 150 and auxiliary reservoir 170 so that alleviating position is set by the actuation gear of control bound 101, makes checking cylinder
180 alleviate, and prevent vehicle internal contracting brake.This, which is extenuated, ensures that valve arrangement is reliable, safe, is conducive to the peace for improving Pneumatic braking system
Full property and stability.The Pneumatic braking system can be not only used for vehicle, can be also used for other gas such as steamer, aircraft, plate armour
Dynamic control field, it is applied widely.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the present invention can have various changes, combination and variation.All within the spirits and principles of the present invention, made by
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (10)
1. one kind extenuating guarantee valve, which is characterized in that including the first control valve and the second control valve, first control valve includes
First cavity, the second cavity and the first spool in second cavity, second control valve include third cavity,
Four cavitys and the second spool in the 4th cavity；
First cavity is connected to train pipe, and second cavity is connected with acceleration and extenuates cylinder and auxiliary reservoir；The third
Cavity and atmosphere, the 4th cavity are connected to checking cylinder；And the 4th cavity selectively with atmosphere；
Second cavity is connect with the 4th cavity, and the first spool movement is so that the gas in the auxiliary reservoir can select
Reach to selecting property in second cavity, second spool it is mobile so that gas in the 4th cavity can selectively with
Atmosphere.
2. according to claim 1 extenuate guarantee valve, which is characterized in that set between the train pipe and first cavity
There is delay cylinder.
3. according to claim 2 extenuate guarantee valve, which is characterized in that set between the delay cylinder and the train pipe
There are the first check valve and first segment head piece, first check valve that the gas in the delay cylinder is made to enter the train pipe；
First check valve and the first segment head piece are arranged in parallel.
4. according to claim 3 extenuate guarantee valve, which is characterized in that second cavity extenuates cylinder with the acceleration
Between be equipped with the second check valve and the second restriction, second check valve makes described the gas extenuated in cylinder to be accelerated to enter institute
State the second cavity；Second check valve and second restriction are arranged in parallel.
5. according to claim 4 extenuate guarantee valve, which is characterized in that set between the 4th cavity and the checking cylinder
There are third check valve and third restriction, the third check valve that the gas in the 4th cavity is made to enter the checking cylinder；
The third check valve and the third restriction are arranged in parallel.
6. according to claim 1 extenuate guarantee valve, which is characterized in that described to accelerate to extenuate the pressure of cylinder more than described
The pressure of train pipe, and when the acceleration pressure difference of extenuating cylinder and the train pipe reaches the first preset value, described first
Spool is moved to first cavity, and the gas in the auxiliary reservoir is blocked by first spool, can not reach the described 4th
Cavity.
7. according to claim 6 extenuate guarantee valve, which is characterized in that first preset value is 10kPa to 20kPa.
8. according to claim 1 extenuate guarantee valve, which is characterized in that the brake-cylinder pressure reaches the second preset value,
Second spool is moved to the third cavity, the 4th cavity and atmosphere；Meanwhile second cavity with it is described
4th cavity is connected to, and pressure reduces, and first spool is moved to second cavity, and the gas in the auxiliary reservoir enters institute
It states in the second cavity.
9. according to claim 8 extenuate guarantee valve, which is characterized in that second preset value is 50kPa to 70kPa.
10. a kind of Pneumatic braking system, which is characterized in that including slow described in any one of control bound and claim 1 to 9
Subtract guarantee valve, described extenuate ensures that valve is connected to the control bound；It is described to extenuate guarantor after the control bound breaks down
Card valve can make the checking cylinder and atmosphere, realize decompression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688448.5A CN108622061B (en) | 2018-06-28 | 2018-06-28 | Relief assurance valve and pneumatic compression system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688448.5A CN108622061B (en) | 2018-06-28 | 2018-06-28 | Relief assurance valve and pneumatic compression system |
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| Publication Number | Publication Date |
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| CN108622061A true CN108622061A (en) | 2018-10-09 |
| CN108622061B CN108622061B (en) | 2023-07-25 |
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| CN201810688448.5A Active CN108622061B (en) | 2018-06-28 | 2018-06-28 | Relief assurance valve and pneumatic compression system |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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|---|---|
| CN108622061B (en) | 2023-07-25 |
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