CN208615935U - It extenuates and guarantees valve and Pneumatic braking system - Google Patents
It extenuates and guarantees valve and Pneumatic braking system Download PDFInfo
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- CN208615935U CN208615935U CN201821018101.1U CN201821018101U CN208615935U CN 208615935 U CN208615935 U CN 208615935U CN 201821018101 U CN201821018101 U CN 201821018101U CN 208615935 U CN208615935 U CN 208615935U
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Abstract
Provided by the utility model extenuate guarantees valve and Pneumatic braking system, is related to air-pressure brake technical field.This, which is extenuated, guarantees 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 is communicated with the atmosphere, and the 4th cavity is connected to checking cylinder；And the 4th cavity is selectively communicated with the 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, and the movement of the second spool is so that the gas in the 4th cavity can selectively be communicated with the atmosphere.This, which is extenuated, guarantees 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, improves the safety and stability of Pneumatic braking system.
Description
Technical field
The utility model relates to air-pressure brake technical fields, extenuate in particular to one kind and guarantee valve and air-pressure brake
System.
Background technique
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 not
It can be communicated with atmosphere, 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, extenuates guarantee valve, it can be ensured that the pressure of checking cylinder is delayed
Subtract, avoid vehicle internal contracting brake, is to be badly in need of the technical issues of improving in current air-pressure brake technical field.
Utility model content
The purpose of this utility model includes providing one kind to extenuate guarantee valve, including the first control valve and the second control valve.When
After control bound breaks down, it can ensure that the pressure in checking cylinder is extenuated, it is ensured that vehicle operates normally, and improves entire braking
The safety and stability of system.
The purpose of this utility model further includes providing a kind of Pneumatic braking system, including control bound and above-mentioned extenuates guarantor
Valve is demonstrate,proved, after control bound breaks down, which can be such that checking cylinder smoothly extenuates after braking, prevent vehicle
Band-type brake, it is ensured that the normal operation of entire braking system, highly-safe, stability is good.
It is that it is realized by adopting the following technical scheme that the utility model, which improves its technical problem,.
One kind provided by the utility model extenuates guarantee valve, including the first control valve and the second control valve, first control
Valve processed includes the first cavity, the second cavity and is set to intracorporal first spool of second chamber, and second control valve includes the
Three cavitys, the 4th cavity and be set to intracorporal second spool of the 4th chamber.
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 is communicated with the atmosphere, and the 4th cavity is connected to checking cylinder；And the 4th cavity selectively connects with atmosphere
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 is communicated with the 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, which are extenuated, is equipped with second one-way valve and the second throttling between cylinder
Mouthful, the second one-way valve makes the acceleration extenuate the gas in cylinder and enters second cavity；The second one-way 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 greater 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 mobile 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 mobile to the third cavity,
4th cavity is communicated with the atmosphere；Meanwhile second cavity is connected to the 4th cavity, and pressure reduces, and described first
Spool is mobile 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 utility model, including control bound and it is above-mentioned extenuate guarantee valve, it is described
It extenuates and guarantees that valve is connected to the control bound；It is described to extenuate that guarantee that valve make described after the control bound breaks down
Checking cylinder is communicated with the atmosphere, and realizes decompression.
It is provided by the utility model extenuate guarantee valve and Pneumatic braking system have the following aspects the utility model has the advantages that
It is provided by the utility model to extenuate guarantee valve, including the first control valve and the second control valve, the first control valve difference
It is connected with train pipe, accelerates to alleviate cylinder and auxiliary reservoir, the second control valve is connected separately with checking cylinder and atmosphere, and the first control
Valve processed and the connection of the second control valve.If control bound breaks down, so that the pressure in checking cylinder cannot extenuate, delay at this time
Solution guarantees that disposition movement can occur for valve, and the portion of air in auxiliary reservoir is discharged, the pressure in auxiliary reservoir is reduced, to make train
Pipe is increased with auxiliary reservoir pressure difference, is alleviated checking cylinder by establishing enough pressure differences, is avoided vehicle internal contracting brake, improve the safety of vehicle
Property and stability.
Pneumatic braking system provided by the utility model, including control bound and above-mentioned release insuring valve, when control is led
After valve breaks down, which can be such that checking cylinder smoothly extenuates after braking, prevent vehicle internal contracting brake, it is ensured that entire
The normal operation of braking system, highly-safe, stability is good.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is a kind of application scenarios structural schematic diagram for extenuating guarantee valve that the utility model specific embodiment provides；
Fig. 2 is the application scenarios structural schematic diagram of control bound；
Fig. 3 is the structural schematic diagram for the original state for extenuating guarantee valve that the utility model specific embodiment provides；
Fig. 4 is the structural schematic diagram for the first service state for extenuating guarantee valve that the utility model specific embodiment provides；
Fig. 5 is the structural schematic diagram for the braking latter stage state for extenuating guarantee valve that the utility model specific embodiment provides；
Fig. 6 is the structural schematic diagram for the first relieved state for extenuating guarantee valve that the utility model specific embodiment provides；
Fig. 7 is the structural schematic diagram for the alleviation latter stage state for extenuating guarantee valve that the utility model specific embodiment provides；
Fig. 8 extenuates guarantee valve under control bound abnormal conditions for what the utility model specific embodiment provided, just alleviates
The structural schematic diagram of state；
Fig. 9 extenuates guarantee valve under control bound abnormal conditions for what the utility model specific embodiment provided, in alleviation
The structural schematic diagram of phase state.
Icon: the first control valve of 110-；The first cavity of 111-；The second cavity of 113-；The first spool of 115-；The first film of 117-
Plate；The first spring of 119-；The second control valve of 130-；131- third cavity；The 4th cavity of 133-；The second spool of 135-；137-
Two diaphragm plates；139- second spring；150- train pipe；151- first segment head piece；The first check valve of 153-；155- delay cylinder；
Cylinder is extenuated in 160- acceleration；161- second one-way valve；The second restriction of 163-；170- auxiliary reservoir；The 4th restriction of 171-；180-
Checking cylinder；181- third check valve；183- third restriction；101- control bound.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
In the description of the present invention, it should be understood that the orientation or positional relationship of the instructions such as term " on ", "lower"
For be based on the orientation or positional relationship shown in the drawings or the utility model product using when the orientation or position usually put
The orientation or positional relationship that relationship or those skilled in the art usually understand is merely for convenience of description the utility model
It is described with simplifying, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with specific orientation structure
It makes and operates, therefore should not be understood as limiting the present invention.
" first " of the utility model, " second " etc., are only used to distinguish between description, and contain not special
Justice.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " 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；It can
It, can also be indirectly connected through an intermediary to be to be connected directly.It for the ordinary skill in the art, can be specific
Situation understands 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 utility model specific embodiment provides, and is asked
Referring 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 is communicated with the atmosphere, and the 4th cavity 133 is connected to checking cylinder 180.And the 4th cavity 133 is selectively
It is communicated with the atmosphere.
Second cavity 113 is connect with the 4th cavity 133, and the first spool 115 is mobile so that the gas in auxiliary reservoir 170 can select
It reaches to selecting property in the second cavity 113, the second spool 135 is mobile so that gas in the 4th cavity 133 can selectively and greatly
Gas connection.
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 first spool 115 is mobile to drive the first diaphragm plate 117 mobile, stretches 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 the second diaphragm plates 137 of mobile drive are mobile, 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 being delayed in 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 greater 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 flows in delay cylinder 155 from first segment head piece 151.
Second cavity 113 and acceleration extenuate and are equipped with second one-way valve 161 and the second restriction 163 between cylinder 160, and second
Check valve 161 makes the gas for accelerating to extenuate in cylinder 160 enter the second cavity 113；Second one-way valve 161 and the second restriction
163 are arranged in parallel.
Gas when the pressure in the second cavity 113, which is greater than, to be accelerated to extenuate the pressure in cylinder 160, 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 flow in the second cavity 113 from second one-way 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 greater 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 in the 4th cavity 133 by third restriction 183.
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 is communicated with the atmosphere after the first control valve 110, the second control valve 130.Only when the first control valve 110 and
After two control valves 130 are opened, the gas in auxiliary reservoir 170 could be discharged.
Fig. 2 is the application scenarios structural schematic diagram of control bound 101, referring to figure 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 is depressurized, and 170 pressure of auxiliary reservoir is greater 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 greater than
170 pressure of auxiliary reservoir, actuation gear are placed in alleviating position, and checking cylinder 180 is communicated with atmosphere, and checking cylinder 180 is alleviated.
When alleviation, if control bound 101 breaks down, train pipe 150 and 170 pressure difference of auxiliary reservoir is caused to be insufficient to allow work
It is placed in alleviating position with mechanism, then checking cylinder 180 cannot be communicated with atmosphere, and checking cylinder 180 is not alleviated, and will cause vehicle internal contracting brake.?
Under this operating condition, release insuring valve is acted disposition occurs, and exhausts the air in a part of auxiliary reservoir 170, reduces auxiliary reservoir 170
Pressure increases train pipe 150 and 170 pressure difference of auxiliary reservoir, establishes enough pressure differences and guarantees that the actuation gear of control bound 101 sets
Alleviating position, so that checking cylinder 180 be made to alleviate.
Specifically, the first control valve 110 according to the on-position of vehicle on-off:
When the pressure for accelerating the pressure for extenuating cylinder 160 to be greater than train pipe 150, and accelerate to extenuate cylinder 160 and train pipe
When 150 pressure difference reaches the first preset value, the movement of the first control valve 110.First spool 115 is mobile 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 movement of the first control valve 110.
Second control valve 130 on-off according to the pressure of checking cylinder 180:
When 180 pressure of checking cylinder is greater than the second preset value, the movement of the second control valve 130.Second spool 135 is to third cavity
131 is mobile, 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 mobile 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 movement of the second control valve 130.
It is provided by the utility model to extenuate guarantee valve, alleviate process and working 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 cylinder 160 is extenuated in the pressure in train pipe 150 and 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 alleviates cylinder pressure and remains fixed by the first decline rapidly of check valve 153, the pressure of the second cavity 113 and acceleration
Pressure, the pressure of the second cavity 113 are greater 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 movement 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 movement, 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 by first segment head piece 151 to the first cavity 111 of the first control valve 110, 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, which 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 second one-way 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, the pressure of first cavity 111 is with train pipe in the first control valve 110
150 pressure rises, when the pressure of train pipe 150, which rises to, is less than acceleration alleviation 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 be so that the first control valve 110 is just opened after certain time-delay,
It may insure that the second control valve 130 is turned off when alleviating 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 the actual situation.If delay time is inadequate, the second control valve 130 also in
Open position, the first control valve 110 have been opened, and will lead to the pressure air misprinted 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
The pressure of body 111 is because throttle effect slowly rises, and the pressure in the second cavity 113 maintains level pressure, and the first spool 115 moves 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 lower than level pressure 15kPa, i.e., in train pipe 150
Pressure is moved down lower 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
Valve 110 processed and the second control valve 130 are 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,
The pressure difference of control bound 101 and auxiliary reservoir 170 increases, and establishes alleviate pressure difference quickly, actuation gear is made to be moved to alleviating position, brakes
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.Exhaust channel for the exhaust air rate for limiting auxiliary reservoir 170, 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
Guarantee that valve is connected to control bound 101.After control bound 101 breaks down, extenuates and guarantee that valve can make checking cylinder 180 and atmosphere
Decompression is realized in connection.
In conclusion provided by the utility model extenuate guarantees that valve and Pneumatic braking system have having for the following aspects
Beneficial effect:
Provided by the utility model extenuate guarantees valve and Pneumatic braking system, as the failure of control bound 101, Bu Nengji
When actuation gear being made to be 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
Power quickly establishes the pressure difference of train pipe 150 Yu auxiliary reservoir 170, so that alleviating position is set by the actuation gear of control bound 101, makes to make
Dynamic cylinder 180 is alleviated, and vehicle internal contracting brake is prevented.This, which is extenuated, guarantees that valve arrangement is reliable, highly-safe, is conducive to improve Pneumatic braking system
Safety and stability.The Pneumatic braking system can be not only used for vehicle, can be also used for steamer, aircraft, plate armour etc. its
His pneumatic control field, it is applied widely.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, the utility model can have various changes, combination and variation.It is all the utility model spirit and
Within principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this utility model.
Claims (10)
1. one kind extenuates 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 it is set to intracorporal first spool of second chamber, second control valve includes third cavity, the
Four cavitys and be set to intracorporal second spool of the 4th chamber；
First cavity is connected to train pipe, and second cavity is connected with acceleration and extenuates cylinder and auxiliary reservoir；The third
Cavity is communicated with the atmosphere, and the 4th cavity is connected to checking cylinder；And the 4th cavity is selectively communicated with the 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 makes the gas in the delay cylinder 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 cylinder is extenuated in second cavity and the acceleration
Between be equipped with second one-way valve and the second restriction, the second one-way valve makes described the gas extenuated in cylinder to be accelerated to enter institute
State the second cavity；The second one-way 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 makes the gas in the 4th cavity 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 greater 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 mobile 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 mobile to the third cavity, and the 4th cavity is communicated with the atmosphere；Meanwhile second cavity with it is described
The connection of 4th cavity, pressure reduce, and first spool is mobile 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 delaying described in control bound and any one of claims 1 to 9
Subtract guarantee valve, described extenuate guarantees that valve is connected to the control bound；It is described to extenuate guarantor after the control bound breaks down
Card valve can be such that the checking cylinder is communicated with the atmosphere, and realize decompression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018101.1U CN208615935U (en) | 2018-06-28 | 2018-06-28 | It extenuates and guarantees valve and Pneumatic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018101.1U CN208615935U (en) | 2018-06-28 | 2018-06-28 | It extenuates and guarantees valve and Pneumatic braking system |
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| CN208615935U true CN208615935U (en) | 2019-03-19 |
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| CN201821018101.1U Active CN208615935U (en) | 2018-06-28 | 2018-06-28 | It extenuates and guarantees valve and Pneumatic braking system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108622061A (en) * | 2018-06-28 | 2018-10-09 | 眉山中车制动科技股份有限公司 | It extenuates and ensures valve and Pneumatic braking system |
| CN114834420A (en) * | 2022-05-13 | 2022-08-02 | 中车齐齐哈尔车辆有限公司 | Accelerated brake valve and air control valve with same |
-
2018
- 2018-06-28 CN CN201821018101.1U patent/CN208615935U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108622061A (en) * | 2018-06-28 | 2018-10-09 | 眉山中车制动科技股份有限公司 | It extenuates and ensures valve and Pneumatic braking system |
| CN114834420A (en) * | 2022-05-13 | 2022-08-02 | 中车齐齐哈尔车辆有限公司 | Accelerated brake valve and air control valve with same |
| CN114834420B (en) * | 2022-05-13 | 2023-04-25 | 中车齐齐哈尔车辆有限公司 | Accelerating brake valve and air control valve with same |
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