CN104149813B - A kind of rail vehicle and alleviation parking brake system thereof - Google Patents

A kind of rail vehicle and alleviation parking brake system thereof Download PDF

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Publication number
CN104149813B
CN104149813B CN201410421276.7A CN201410421276A CN104149813B CN 104149813 B CN104149813 B CN 104149813B CN 201410421276 A CN201410421276 A CN 201410421276A CN 104149813 B CN104149813 B CN 104149813B
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Prior art keywords
parking brake
air
cutout cock
reservoir
vehicle
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CN104149813A (en
Inventor
马喜成
汪波
毛如香
张彦华
刘亚宁
王鑫
孙瑶
齐晓明
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CRRC Zhuzhou Locomotive Co Ltd
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CSR Zhuzhou Electric Locomotive Co Ltd
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Abstract

The invention discloses a kind of rail vehicle and alleviate parking brake system, control to arrange parking brake check valve between pulse valve at braking reservoir and parking brake;The first normally opened cutout cock is set in the middle of the gas circuit that air suspension reservoir leads to altitude valve and air spring, and between air suspension reservoir and the first cutout cock, draws a pipeline and be connected between parking brake check valve and parking brake control pulse valve by the second normally closed cutout cock;After vehicle air pressure drops to certain numerical value and automatically applies parking brake, staff is operated by the position that turns on and off of cutout cock and can be incorporated in brake by the compression air in air suspension reservoir, thus alleviating the parking brake of brake;When vehicle is without electricity, the pressure air stored in air suspension reservoir on vehicle can be utilized to alleviate the parking brake of vehicle, alleviates intensity of workers by this system;It is easy to car operation and maintenance.

Description

A kind of rail vehicle and alleviation parking brake system thereof
Technical field
The present invention relates to rail vehicle technical field, particularly to a kind of rail vehicle and alleviation parking brake system thereof.
Background technology
Current domestic rail traffic vehicles major part all adopts Pneumatic brake systems, for security consideration, all has parking brake function.Being typically on each axle and install a brake with parking brake function, the brake with parking brake function on two axles of same bogie is arranged diagonal, and the alleviation mode of parking brake is as follows:
1., when rail traffic vehicles has electricity, can pass through to press parking brake in drivers' cab and alleviate button to the parking brake pulse valve B19 transmission alleviation instruction signal of telecommunication of each car thus alleviating all parking brakes of permutation car.
2. when rail vehicle is without when electric, air compressor quits work, and vehicle air pipeline is revealed due to air and caused that air pressure constantly declines, and when the Parking Brake Cylinders pressure of brake C3 drops to a certain degree, parking brake applies automatically.Owing to Parking Brake Cylinders is connected with the air reservoir A1 and braking reservoir B3 of this car, therefore when in vehicle is without electricity situation, parking brake applies automatically time, may determine that the air pressure of vehicle air reservoir A1 and the braking reservoir B3 numerical value already below regulation, now only by operation setting alleviation draw ring on brake C3 one by one mechanically outside bogie, alleviate the parking brake on brake C3.
The gas circuit principle of existing structure is referred to shown in Fig. 1, in one train, the air main of each vehicle is connected with the air main of Adjacent vehicles in this train by car end flexible pipe, the air reservoir A1 of each car is connected with air main, being connected by brake check valve B2 between air reservoir A1 with braking reservoir B3, air reservoir A1 is connected by air suspension check valve B1 with air suspension reservoir L1.Therefore, compression air can only be unidirectional from air reservoir A1 be passed to braking reservoir B3 and air suspension reservoir L1, this guarantees just in case when air pressure lower than braking reservoir B3 and air suspension reservoir L1 of air main and air reservoir A1 air pressure, compression air will not be passed to air main and air reservoir A1 from braking reservoir B3 and air suspension reservoir L1, still there is certain stopping power, ensured the safety of train to a certain extent.
The compression air a-road-through of braking reservoir B3 is its air feed to braking distributing valve B5, and braking distributing valve B5 provides the pressure air of certain numerical value to make it to produce air damping by being connected flexible pipe B10 between bogie cutout cock B9 and bogie with car body to brake C1 and C3 according to train braking instruction.Another road of compression air of braking reservoir B3 is led to parking brake and is controlled pulse valve B19, and parking brake controls the pulse valve B19 electric impulse signal sent according to train or manually operates the button on this valve and make brake C3 apply or alleviate parking brake.The effect of two-way valve B20 is to prevent air damping and parking brake superposition, to avoid skidding or flat sliding when brake force is excessive to be caused braking.The air of air suspension reservoir L1 leads to altitude valve and air spring, for supplying to air spring.
At vehicle without in electricity situation, air compressor quits work, and vehicle air pipeline is revealed due to air and caused that air pressure constantly declines, and when the Parking Brake Cylinders pressure of brake C3 drops to a certain degree, parking brake applies automatically.Owing to Parking Brake Cylinders is connected with the air reservoir A1 and braking reservoir B3 of this car, therefore when in vehicle is without electricity situation, parking brake applies automatically time, may determine that the air pressure of vehicle air reservoir A1 and the braking reservoir B3 numerical value already below regulation, now only by operation setting alleviation draw ring on brake C3 one by one mechanically outside bogie, alleviate the parking brake on brake C3.
Therefore, when vehicle is without when electric, parking brake can only be alleviated in outside vehicle manual operation mechanically, intensity of workers is big, simultaneously it is possible that alleviate, due to what the problems such as storing cycle regional space is narrow and small caused, the problem that parking brake is difficult to even cannot operate outside car.
Summary of the invention
In view of this, the invention provides a kind of rail vehicle and alleviate parking brake system, by the transformation controlling gas circuit, it is possible to when vehicle is without electricity, utilize the pressure air stored in air suspension reservoir on vehicle to alleviate the parking brake of vehicle, it is simple to car operation and maintenance.
Present invention also offers a kind of rail vehicle applying above-mentioned alleviation parking brake system.
For achieving the above object, the present invention provides following technical scheme:
A kind of rail vehicle alleviates parking brake system, including main air pipeline, air suspension pipeline and brake piping, described main air pipeline includes air main and air reservoir, described air suspension pipeline and described brake piping are parallel to the outlet air end of described air reservoir, and the outlet air end of the checking cylinder in described brake piping is parallel with pneumatic brake pipe and parking brake pipeline;
Air suspension reservoir in described air suspension pipeline leads in the gas circuit of altitude valve and air spring and is provided with the first normally opened cutout cock;
Parking brake in the outlet air end of the described checking cylinder in described brake piping and described pneumatic brake pipe controls to be provided with between pulse valve parking brake check valve, and described parking brake check valve is control pulse valve one-way conduction towards described parking brake;
Described rail vehicle is alleviated parking brake system and is also included the second normally closed cutout cock, and one end of described second cutout cock is communicated in the gas circuit between described air suspension reservoir and described first cutout cock, the other end is communicated in described parking brake check valve and described parking brake controls the gas circuit between pulse valve.
Preferably, described first cutout cock and described second cutout cock are installed in guest room.
Preferably, described first cutout cock and described second cutout cock are installed under same guest room seat and arrange lead sealing.
Preferably, being arranged under same guest room seat and be respectively provided with lead sealing of described first cutout cock and described second cutout cock and the bogie cutout cock in described pneumatic brake pipe.
A kind of rail vehicle, including alleviating parking brake system, the rail vehicle that described alleviation parking brake system is above-mentioned alleviates parking brake system
From above-mentioned technical scheme it can be seen that rail vehicle provided by the invention alleviates parking brake system, control to arrange a parking brake check valve between pulse valve at braking reservoir and parking brake;First cutout cock is set in the middle of the gas circuit that air suspension reservoir leads to altitude valve and air spring, and between air suspension reservoir and the first cutout cock, draws a pipeline and be connected between parking brake check valve and parking brake control pulse valve by the second cutout cock;By cutout cock turn on and off position can keep air suspension reservoir compressed air after vehicle is without electricity long-time in No leakage substantially;
After vehicle air pressure drops to certain numerical value and automatically applies parking brake, if desired for alleviating parking brake, staff is operated by the position that turns on and off of cutout cock and can be incorporated in brake by the compression air in air suspension reservoir, thus alleviating the parking brake of brake;
When vehicle recovers after normally from without electricity situation, cutout cock should being placed in appropriate state, vehicle returns to function under normal circumstances.
When vehicle is without electricity, the pressure air stored in air suspension reservoir on vehicle can be utilized to alleviate the parking brake of vehicle by this system;When vehicle is without electricity, staff can outside car hand relieving parking brake mechanically, alleviate intensity of workers;Can solve outside car, to alleviate, due to what the problems such as storing cycle regional space is narrow and small caused, the problem that parking brake is difficult to even cannot operate;Changing little to existing vehicle gas circuit structure, the part dimension of increase is less, it is easy to find installing space, it is easy to repair and maintenance.
Present invention also offers a kind of rail vehicle applying above-mentioned alleviation parking brake system.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of gas circuit of prior art middle orbit vehicle and parking brake relevant portion;
Fig. 2 alleviates the schematic diagram of gas circuit of parking brake system for the rail vehicle that the embodiment of the present invention provides.
Wherein, A1 is air reservoir, and B1 is air suspension check valve, L1 is air suspension reservoir, and L2 is the first cutout cock, and L3 is the second cutout cock, B2 is brake check valve, and B3 is checking cylinder, and B4 is parking brake check valve, B5 is braking distributing valve, and B9 is bogie cutout cock, and B10 is for connecting flexible pipe, C1 and C3 is brake, B19 is that parking brake controls pulse valve, and B20 is two-way valve, and B23 is parking brake flexible pipe.
Detailed description of the invention
The invention discloses a kind of rail vehicle and alleviate parking brake system, by to the transformation controlling gas circuit, when vehicle is without electricity, the pressure air stored in air suspension reservoir on vehicle can be utilized to alleviate the parking brake of vehicle, it is simple to car operation and maintenance.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Refer to Fig. 2, Fig. 2 and alleviate the schematic diagram of gas circuit of parking brake system for the rail vehicle that the embodiment of the present invention provides.
The rail vehicle that the embodiment of the present invention provides alleviates parking brake system, including main air pipeline, air suspension pipeline and brake piping, wherein main air pipeline includes air main and air reservoir A1, air suspension pipeline and brake piping are parallel to the outlet air end of air reservoir, and the outlet air end of the checking cylinder B3 in brake piping is parallel with pneumatic brake pipe and parking brake pipeline;Air suspension pipeline can be identical compared with technology with structure with the principle of brake piping, does not repeat them here;
Its core improvement is in that, shown in the broken box in Fig. 2, the air suspension reservoir L1 in air suspension pipeline leads in the gas circuit of altitude valve and air spring and is provided with the first normally opened cutout cock L2;
Parking brake in the outlet air end of the checking cylinder B3 in brake piping and pneumatic brake pipe controls to be provided with between pulse valve B19 parking brake check valve B4, and parking brake check valve B4 controls pulse valve B19 one-way conduction towards parking brake;
Rail vehicle is alleviated parking brake system and is also included the second normally closed cutout cock L3, and second one end of cutout cock L3 be communicated in the gas circuit between air suspension reservoir L1 and the first cutout cock L2, the other end is communicated in parking brake check valve B4 and parking brake controls the gas circuit between pulse valve B19.
From above-mentioned technical scheme it can be seen that the rail vehicle that the embodiment of the present invention provides alleviates parking brake system, control to arrange parking brake check valve B4 between pulse valve B19 at braking reservoir B3 and parking brake;Lead at air suspension reservoir L1 and the first cutout cock L2 is set in the middle of the gas circuit of altitude valve and air spring, and between air suspension reservoir L1 and the first cutout cock L2, draw a pipeline and be connected between parking brake check valve B4 and parking brake control pulse valve B19 by the second cutout cock L3;First cutout cock L2 is in opening state time flat;Second cutout cock L3 is closed time flat.Therefore the attainable function of the gas circuit principle of this programme is identical with the function achieved by the gas circuit principle of existing vehicle under normal circumstances.
When vehicle is without in electricity situation, the design principle according to fault-safety principle, vehicle will apply the emergency brake automatically, and now, vehicle remains stationary state.Now the first cutout cock L2 should be placed in off by staff, and by air suspension reservoir L1 with altitude valve and air spring isolation, now air suspension reservoir L1 is substantially without leak point, can keep the inconspicuous change of air pressure for a long time.
After vehicle air pressure drops to certain numerical value and automatically applies parking brake, if desired for alleviating parking brake, second cutout cock L3 should be placed in opening state by staff, effect due to parking brake check valve B4, braking reservoir B3 can not be entered from the pressure air in air suspension reservoir L1, now the pressure air in air suspension reservoir L1 will enter into brake C3 by parts such as parking brake control pulse valve B19, thus alleviating the parking brake of brake C3.
When vehicle recovers after normally from without electricity situation, cutout cock should being placed in appropriate state, namely cutout cock L2 is placed in opening state, and cutout cock L3 is placed in off, and vehicle returns to function under normal circumstances.
When vehicle is without electricity, the pressure air stored in air suspension reservoir on vehicle can be utilized to alleviate the parking brake of vehicle by this system;When vehicle is without electricity, staff can outside car hand relieving parking brake mechanically, alleviate intensity of workers;Can solve outside car, to alleviate, due to what the problems such as storing cycle regional space is narrow and small caused, the problem that parking brake is difficult to even cannot operate;Changing little to existing vehicle gas circuit structure, the part dimension of increase is less, it is easy to find installing space, it is easy to repair and maintenance.
In order to optimize above-mentioned technical scheme further, the first cutout cock L2 and the second cutout cock L3 is installed in guest room, in order to staff's operation in car body guest room.Parking brake check valve B4 can conveniently be arranged on optional position according to stringing.
As preferably, the first cutout cock L2 and the second cutout cock L3 is installed under same guest room seat, is not take up additional space, and arranges lead sealing, to prevent from being misused.
In the specific embodiment that this programme provides, the first cutout cock L2 and the second cutout cock L3 is arranged under same guest room seat with the bogie cutout cock B9's in pneumatic brake pipe and is respectively provided with lead sealing, in order to unified installation, operation and management.
Certainly, the first cutout cock L2 and the second cutout cock L3 according to car body practical structures, can also be arranged in guest room other suitable places by those skilled in the art, does not repeat them here.
The embodiment of the present invention additionally provides a kind of rail vehicle applying above-mentioned alleviation parking brake system.
In this specification, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.

Claims (5)

1. a rail vehicle alleviates parking brake system, including main air pipeline, air suspension pipeline and brake piping, described main air pipeline includes air main and air reservoir (A1), described air suspension pipeline and described brake piping are parallel to the outlet air end of described air reservoir, and the outlet air end of the checking cylinder (B3) in described brake piping is parallel with pneumatic brake pipe and parking brake pipeline;
It is characterized in that, the air suspension reservoir (L1) in described air suspension pipeline leads in the gas circuit of altitude valve and air spring and is provided with normally opened the first cutout cock (L2);
Parking brake in the outlet air end of the described checking cylinder (B3) in described brake piping and described pneumatic brake pipe controls to be provided with between pulse valve (B19) parking brake check valve (B4), and described parking brake check valve (B4) is control pulse valve (B19) one-way conduction towards described parking brake;
Described rail vehicle is alleviated parking brake system and is also included normally closed the second cutout cock (L3), and one end of described second cutout cock (L3) is communicated in the gas circuit between described air suspension reservoir (L1) and described first cutout cock (L2), the other end is communicated in described parking brake check valve (B4) and described parking brake controls the gas circuit between pulse valve (B19).
2. rail vehicle according to claim 1 alleviates parking brake system, it is characterised in that described first cutout cock (L2) and described second cutout cock (L3) are installed in guest room.
3. rail vehicle according to claim 2 alleviates parking brake system, it is characterised in that described first cutout cock (L2) and described second cutout cock (L3) are installed under same guest room seat and arrange lead sealing.
4. rail vehicle according to claim 3 alleviates parking brake system, it is characterized in that, described first cutout cock (L2) and described second cutout cock (L3) are arranged under same guest room seat with the bogie cutout cock (B9) in described pneumatic brake pipe and are respectively provided with lead sealing.
5. a rail vehicle, including alleviating parking brake system, it is characterised in that described alleviation parking brake system is that the rail vehicle described in claim 1-4 any one alleviates parking brake system.
CN201410421276.7A 2014-08-25 2014-08-25 A kind of rail vehicle and alleviation parking brake system thereof Active CN104149813B (en)

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CN201410421276.7A CN104149813B (en) 2014-08-25 2014-08-25 A kind of rail vehicle and alleviation parking brake system thereof

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Application Number Priority Date Filing Date Title
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CN104149813B true CN104149813B (en) 2016-07-06

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Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104742890B (en) * 2015-04-10 2017-10-31 中铁四局集团有限公司 The double gas circuit brake systems of battery truck
CN105711578B (en) * 2016-03-31 2018-06-01 克诺尔车辆设备(苏州)有限公司 It is a kind of that there is the remotely parking brake control unit of alleviation and condition monitoring
CN106043262B (en) * 2016-06-12 2018-11-27 中车青岛四方机车车辆股份有限公司 Cut off the methods, devices and systems of bogie braking
CN106428097A (en) * 2016-11-01 2017-02-22 中车株洲电力机车有限公司 Locomotive and parking brake machine release system thereof
CN106476775B (en) * 2016-11-16 2023-03-21 中车兰州机车有限公司 Locomotive air brake system and locomotive
CN106428070A (en) * 2016-11-25 2017-02-22 中车长春轨道客车股份有限公司 Compressed air control and distribution module for railway vehicle
CN107284468A (en) * 2017-06-29 2017-10-24 湘电重型装备有限公司 A kind of unmanned engine brakes
CN108116436A (en) * 2017-11-16 2018-06-05 中车四方车辆有限公司 A kind of passenger train air feed system
CN109318928B (en) * 2017-12-20 2020-01-10 中车长春轨道客车股份有限公司 Train brake cylinder pressure control system and rail train
CN108454649B (en) * 2018-04-04 2023-08-15 湖南高速铁路职业技术学院 Remote relieving system for parking brake of locomotive and motor train unit
CN109080611A (en) * 2018-07-10 2018-12-25 克诺尔车辆设备(苏州)有限公司 It is a kind of to be realized the parking brake control device remotely alleviated under rescue mode
CN109080659B (en) * 2018-09-12 2023-08-18 宝鸡中车时代工程机械有限公司 Parking brake control device for railway vehicle
CN109435927B (en) * 2018-09-30 2024-03-15 中铁武汉勘察设计院有限公司 Rail power flat car and braking system and braking control method thereof
JP7308047B2 (en) * 2019-02-12 2023-07-13 ナブテスコ株式会社 Brake equipment for railway vehicles
CN110304100B (en) * 2019-07-05 2020-07-24 中车青岛四方车辆研究所有限公司 Parking brake control module and rail vehicle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100732566B1 (en) * 2005-10-31 2007-06-27 (주)아한피앤이 A train brake system
CN201334003Y (en) * 2008-11-29 2009-10-28 兰州金牛轨道交通装备有限责任公司 Electric-locomotive air brake equipment
KR101130616B1 (en) * 2010-07-12 2012-04-02 현대로템 주식회사 Brake system integrated module for railway vehicle
CN102152800B (en) * 2011-03-02 2013-06-05 中国铁道科学研究院机车车辆研究所 Wagon brake system
CN102963390B (en) * 2012-05-31 2015-03-04 南京浦镇海泰制动设备有限公司 Brake control device for railway carriages
CN102963347B (en) * 2012-11-15 2014-08-27 南车株洲电力机车有限公司 Air brake system for automatic program management (APM) vehicle
CN102963344B (en) * 2012-12-04 2015-07-29 北京二七轨道交通装备有限责任公司 Guideway vehicle Pneumatic brake systems control setup

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