CN114394072B - Brake valve relief operation device - Google Patents
Brake valve relief operation device Download PDFInfo
- Publication number
- CN114394072B CN114394072B CN202210012482.7A CN202210012482A CN114394072B CN 114394072 B CN114394072 B CN 114394072B CN 202210012482 A CN202210012482 A CN 202210012482A CN 114394072 B CN114394072 B CN 114394072B
- Authority
- CN
- China
- Prior art keywords
- valve handle
- relief valve
- relief
- valve
- handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/26—Compressed-air systems
- B60T13/40—Compressed-air systems indirect, i.e. compressed air booster units indirect systems
-
- 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
- B60T15/021—Railway control or brake valves
-
- 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
- B60T15/04—Driver's valves
- B60T15/048—Controlling pressure brakes of railway vehicles
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention relates to a brake valve relief operating device, comprising the following components: the relief valve handle is movably connected with the 120 valve through a relief valve handle seat; the two stay wires are connected with the relief valve handle at the first ends and the two handles at the second ends, and the stay wires are provided with a reset box for resetting the stay wires, and the stay wires are assembled on the chassis of the vehicle body through a hanging seat. According to the invention, the relief valve handle and the relief valve handle seat are matched through the steps and the boss, the relief valve handle seat is assembled in the 120 valve, the steps of the relief valve handle are assembled on the boss of the relief valve handle seat upwards through rotation, and the relief valve handle is stressed by the boss and positioned by the cotter pin, so that the problem that the relief valve handle falls off due to the breaking of the cotter pin is solved.
Description
Technical Field
The invention relates to a brake valve relieving operation device, and belongs to the technical field of transportation.
Background
The existing air brake device for the railway freight car is mainly provided with a 120-type air control valve (120 valve for short), after braking, the pressure air of a brake cylinder can be semi-automatically discharged by a release valve of the 120-type air control valve, or a release valve handle is pulled to release the vehicle, and the pressure air of the whole brake system (comprising the brake cylinder, an auxiliary air cylinder, an acceleration release air cylinder and a train pipe) can be discharged completely. The 120-valve relieving valve handle is broken off by using the unit feedback, and the 4 multiplied by 50 cotter pin between the 120-valve relieving valve handle and the relieving valve handle seat breaks off, so that the relieving valve handle is broken off and lost; through analysis, the cotter pin is not broken off instantaneously and falls off, and can be fast operated along with a vehicle for a long time, so that the valve pull rod is relieved from transversely shaking, the valve handle is driven to be relieved, the surface hardness of part of the cotter pin is insufficient, and the cotter pin is gradually worn until fatigue fracture occurs.
The existing general truck relief valve pull rod is made of round steel with the diameter of 10mm in a stewing mode, the relief valve pull rod is fixed on a chassis of a truck body through a hanging seat, one end of the relief valve pull rod is connected with a 120 valve relief valve handle through a cotter pin, the other end of the relief valve pull rod is made into a closed operation handle in a stewing mode, the operation handle is arranged on the hanging seat, and the 120 valve is relieved by pushing and pulling the operation handle.
Part of the weight of the existing relief valve pull rod is borne by the relief valve handle and the connected cotter pin, so that part of the cotter pin is subjected to fatigue fracture. Because the relief valve pull rod is of a rigid structure, the relief valve pull rod needs to be bent in order to avoid other parts in design, and the relief valve pull rod is easy to deform, break and other faults in the application process; in order to operate the 120 valve for relief, the angle and mounting position of the relief valve lever for bending are spatially limited and can only be arranged on the underframe of the 120 valve mounting position.
Disclosure of Invention
According to the brake valve relieving operation device, the flexible operation relieving valve handle is adopted, meanwhile, the device is fixed by adopting the bracket, so that the stress when the relieving valve handle is not operated is reduced, and the falling-off of the relieving valve handle is avoided.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a brake valve relief operating device comprising the following components:
the relief valve handle is movably connected with the 120 valve through a relief valve handle seat;
the two stay wires are connected with the relief valve handle at the first ends and the two handles at the second ends, and the stay wires are provided with a reset box for resetting the stay wires, and the stay wires are assembled on the chassis of the vehicle body through a hanging seat.
In the brake valve releasing operation device, preferably, the pull wire includes a rope and a sheath that is sleeved outside the rope.
In the brake valve relieving operation device, preferably, the sheath comprises a nylon layer, a steel wire layer and a polyurethane coating layer which are sequentially arranged from inside to outside.
The brake valve relieving operation device preferably comprises a reset box and a protection tube, wherein the reset box comprises a compression spring and a protection tube, the compression spring is sleeved on the rope, a check ring and a stator are arranged at two ends of the compression spring, and the protection tube is sleeved outside the compression spring.
In the brake valve relieving operation device, preferably, one end where the stator is located is further provided with a stator end for connecting with a vehicle underframe.
The brake valve relieving operation device preferably comprises a screw-shaped valve handle seat, and comprises a base and an extension rod arranged below the base, wherein a boss is arranged at the lower end of the extension rod.
In the brake valve releasing operation device, preferably, the releasing valve handle includes a hollow cylinder and a U-shaped plate located below the hollow cylinder, and a step is disposed in the hollow cylinder and is used for being matched with the boss.
The brake valve release operating means, preferably, the hollow cylinder and the U-shaped plate are provided with a first through hole and a second through hole respectively, a first cotter pin is accommodated in the first through hole and used for connecting the release valve handle seat with the release valve handle, a second cotter pin is accommodated in the second through hole, a joint is arranged at the first end of the pull wire, and the second cotter pin is used for connecting the pull wire with the release valve handle.
In the brake valve releasing operation device, preferably, a circular hole is formed in the joint, and the second cotter pin passes through the second through hole and the circular hole to connect the pull wire with the releasing valve handle.
In the brake valve releasing operation device, preferably, the suspension base includes an elevator and a sheath suspension base, both of which are used for fixing the pull wire to the chassis of the vehicle body.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention adopts the flexible device to operate the relief valve handle, and adopts the bracket to fix the device, so that the stress of the relief valve handle when the relief valve handle is not operated is reduced, and the relief valve handle is prevented from falling off.
2. The device can put the operating handle at any position according to the requirement to operate the relief valve so as to relieve the exhaust vehicle of the braking system, and the convenience of operating the relief valve is improved.
3. The invention adopts the flexible device, changes the force-transferring relief valve pull rod from round steel with the diameter of 10mm into a flexible steel wire rope, is not easy to break and deform, is convenient to turn, and the 120-valve relief valve pull rope can avoid parts on a truck, and can avoid collision damage when the fittings are disassembled according to the structure of the chassis of the truck body.
4. According to the invention, the relief valve handle and the relief valve handle seat are matched through the steps and the boss, the relief valve handle seat is assembled in the 120 valve, the steps of the relief valve handle are assembled on the boss of the relief valve handle seat upwards through rotation, and the relief valve handle is stressed by the boss and positioned by the cotter pin, so that the problem that the relief valve handle falls off due to the breaking of the cotter pin is solved.
Drawings
FIG. 1 is a schematic illustration of a conventional truck relief valve pull rod of the present invention;
FIG. 2 is a schematic view of a brake valve mitigating operating device according to an embodiment of the present invention;
FIG. 3 is a schematic view of a reset cartridge according to the embodiment of the present invention;
FIG. 4 is a schematic view of a relief valve handle and a relief valve handle seat provided in this embodiment of the present invention;
a in fig. 5 is a top view of the relief valve handle seat, and b is a front view of the relief valve handle seat;
a in fig. 6 is a front view of the relief valve handle, and b is a top view of the relief valve handle;
FIG. 7 is an example of an application of the brake valve relieving operating device of the present invention;
the figures are marked as follows:
1-a relief valve pull rod; 2-a safety bracket; 3-120 valves; 4-a pull rod hanging seat; 5-stay wire; 6-a relief valve handle; 7-a relief valve handle mount; 8-resetting the box; 9-hanging an elevator; 10-handle; 11-a first cotter pin; 12-linker; 13-sheath hanging seats; 14-a second cotter pin;
501-rope; 502-sheath;
601-steps;
701-boss;
801-a stator; 802-protective tube; 803-compressing the spring; 804-check ring; 805-stator ends.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," "third," "fourth," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The brake valve relieving operation device is arranged on the lower side of the underframe of the railway wagon body. The left side and the right side of the underframe are respectively provided with a set of release stay wires 5, one end of each release stay wire is connected to the release valve handle 6, the other end of each release stay wire is respectively arranged below the side beams at the two sides of the underframe through the handle 10, and when the brake system needs to manually release the 120 valve 3, the handle 10 can be operated at the two sides of the underframe to release the 120 valve 3. The length of the release stay wires 5 at the two sides of the underframe is different from the length of the wiring, namely the bending curve, and other structures are consistent. Because the brake valve release pull wire 5 is softer, the elevator 9 and the sheath hanging seat 13 are arranged at the positions with the straight line section interval larger than 500mm and the turning, and the brake valve release pull wire 5 is fixed on the underframe. When the exhaust of the 120 valve 3 is released, the handle 10 is loosened, the steel wire rope (namely the rope 501) is automatically reset under the action of the reset box 8, and the handle 10 returns to the reset position. The brake valve release operating device routes according to the position of the valve 3, the vehicle body structure and the like, routes along each beam of the chassis for aesthetic purposes, and finally places the handle 10 at a position convenient for operation and observation.
As shown in fig. 2, the brake valve releasing operation device provided by the invention comprises the following components: a relief valve handle 6, wherein the relief valve handle 6 is movably connected with the 120 valve 3 through a relief valve handle seat 7; the first ends of the two pull wires 5 are connected with the relief valve handle 6, the second ends of the two pull wires 5 are respectively connected with the two handles 10, and the pull wires 5 are provided with a reset box 8 for resetting the pull wires 5, and the pull wires 5 are assembled on the underframe of the car body through a hanging seat.
In a preferred embodiment of the invention, the pull wire 5 comprises a rope 501 and a sheath 502 which is sheathed outside the rope 501. The sheath 502 includes a nylon layer, a steel wire layer, and a polyurethane coating layer arranged in this order from the inside to the outside. The inner layer is a transparent nylon lining layer for preventing friction of the steel wire rope, the middle is a common carbon steel wire protective layer, and the outermost layer is a black cold-resistant high-temperature-resistant polyurethane coating.
In a preferred embodiment of the present invention, as shown in fig. 3, the reset box 8 includes a compression spring 803 and a protection tube 802, the compression spring 803 is sleeved on the rope 501, two ends of the compression spring 803 are provided with a retainer 804 and a stator 801, and the protection tube 802 is sleeved outside the compression spring 803.
In a preferred embodiment of the present invention, as shown in fig. 3, the end of the stator 801 is further provided with a stator end 805 for connection to the underframe of the vehicle body. The reset box 8 works as follows: the stator 801 is pressed onto a steel wire rope (the position can be placed according to the requirement), when the steel wire rope is pulled, the steel wire rope and the stator 801 are displaced together, the stator 801 compresses a compression spring 803 in a reset box 8, a retainer ring 804 and a sheath 502 are arranged on the other side of the compression spring 803, after the handle 10 is loosened, the compression spring 803 is restored, and the stator 801 returns to a restoring position under the action of the elasticity of the compression spring 803, so that the steel wire rope is reset.
In a preferred embodiment of the present invention, as shown in fig. 4 and 5, the relief valve handle seat 7 is of a screw-like structure, and includes a base and an extension rod disposed below the base, and a boss 701 is disposed at the lower end of the extension rod.
In a preferred embodiment of the present invention, as shown in fig. 4 and 6, the relief valve handle 6 comprises a hollow cylinder with a step 601 provided therein for mating with a boss 701, and a U-shaped plate located below the hollow cylinder. Two ends of a rope 501 (actually adopting a steel wire rope) are compression joints, and one end is in a circular hole structure and is connected with a relief valve handle 6 at the lower side of the 120 valve 3, and the relief valve handle is connected by adopting a cotter pin; the other end is in a threaded structure and is fixed to the handle 10 by a nut. The relief valve handle 6 and the relief valve handle seat 7 in the device are matched through the steps 601 and the bosses 701, the relief valve handle seat 7 is assembled in the 120 valve 3, the steps 601 of the relief valve handle 6 are assembled on the bosses 701 of the relief valve handle seat 7 upwards through rotation, and particularly, as shown in fig. 4, 5 and 6, the bosses 701 are stressed and the cotter pins are positioned, so that the falling-off fault of the relief valve handle 6 caused by the breaking of the cotter pins is solved.
In a preferred embodiment of the present invention, as shown in fig. 4, a first through hole and a second through hole are provided on the hollow cylinder and the U-shaped plate, respectively, the first through hole accommodates therein a first cotter pin 11 for connecting the relief valve handle seat 7 with the relief valve handle 6, the second through hole accommodates therein a second cotter pin 14, the first end of the pull wire 5 is provided with a joint 12, and the second cotter pin 14 is used for connecting the pull wire 5 with the relief valve handle 6.
In a preferred embodiment of the present invention, as shown in fig. 4, the fitting 12 is provided with a circular hole, and a second cotter pin 14 passes through the second through hole and the circular hole to connect the pull wire 5 with the relief valve handle 6.
In a preferred embodiment of the present invention, as shown in FIGS. 2 and 7, the hanger comprises an elevator 9 and a sheath hanger 13, each for securing the pull wire 12 to the vehicle body underframe.
The working process of the device is as follows: when the brake system needs to manually relieve the 120 valve 3, the handle 10 on any side is pulled outwards, the distance is more than 30mm, as shown in fig. 2, a steel wire rope fixed on the handle 10 by a threaded structure moves along with the handle 10 at the same time, a relieving valve handle 6 connected with the other end of the steel wire rope is pulled, the relieving valve handle 6 drives a relieving valve handle seat 7 to incline, and the internal structure of the 120 valve 3 is pushed to move, so that the 120 valve 3 is discharged and relieved. After the release is completed, the handle is put down, the reset box 8 returns the wire rope to the initial position, and the handle 10 is restored to the starting position.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A brake valve relief operating device characterized by comprising:
the relief valve handle (6) is movably connected with the 120 valve (3) through a relief valve handle seat (7);
the two pull wires (5), the first ends of the two pull wires (5) are connected with the relief valve handle (6), the second ends of the two pull wires are respectively connected with the two handles (10), a reset box (8) is assembled on the pull wires (5) and used for resetting the pull wires (5), and the pull wires (5) are assembled on the underframe of the vehicle body through a hanging seat;
the relief valve handle seat (7) is of a screw-shaped structure and comprises a base and an extension rod arranged below the base, and a boss (701) is arranged at the lower end of the extension rod;
the relief valve handle (6) comprises a hollow cylinder and a U-shaped plate positioned below the hollow cylinder, wherein a step (601) is arranged in the hollow cylinder and is used for being matched with the boss (701);
the hollow cylinder with be provided with first through-hole and second through-hole on the U template respectively, hold first cotter pin (11) in the first through-hole, be used for with alleviate valve handle seat (7) with alleviate valve handle (6) are connected, hold second cotter pin (14) in the second through-hole, the first end of acting as go-between (5) is provided with joint (12), second cotter pin (14) are used for with act as go-between (5) with alleviate valve handle (6) are connected.
2. The brake valve relief operating device according to claim 1, characterized in that the pull wire (5) comprises a rope (501) and a sheath (502) that is sheathed outside the rope (501).
3. The brake valve relief operating device according to claim 2, characterized in that the sheath (502) comprises a nylon layer, a steel wire layer and a polyurethane coating layer arranged in this order from the inside to the outside.
4. The brake valve relief operation device according to claim 2, characterized in that the return box (8) includes a compression spring (803) and a protection tube (802), the compression spring (803) is sleeved on the rope (501), both ends of the compression spring (803) are provided with a retainer ring (804) and a stator (801), and the protection tube (802) is sleeved outside the compression spring (803).
5. The brake valve relief operating device according to claim 4, characterized in that the end of the stator (801) is further provided with a stator end (805) for connection with a vehicle body underframe.
6. Brake valve release operating device according to claim 5, characterized in that the joint (12) is provided with a circular hole, through which the second cotter pin (14) passes, connecting the pull wire (5) with the release valve handle (6).
7. Brake valve release operating device according to claim 1, characterized in that the suspension mount comprises an elevator (9) and a sheath suspension mount (13), each for securing the pull wire (5) to the vehicle body underframe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210012482.7A CN114394072B (en) | 2022-01-06 | 2022-01-06 | Brake valve relief operation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210012482.7A CN114394072B (en) | 2022-01-06 | 2022-01-06 | Brake valve relief operation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114394072A CN114394072A (en) | 2022-04-26 |
| CN114394072B true CN114394072B (en) | 2023-08-08 |
Family
ID=81229694
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210012482.7A Active CN114394072B (en) | 2022-01-06 | 2022-01-06 | Brake valve relief operation device |
Country Status (1)
| Country | Link |
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| CN (1) | CN114394072B (en) |
Citations (11)
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|---|---|---|---|---|
| EP0152816A2 (en) * | 1984-02-23 | 1985-08-28 | Knorr-Bremse Ag | Hand brake control valve for braking systems, in particular of motor vehicles |
| US6065766A (en) * | 1998-10-15 | 2000-05-23 | Pulliam; Randall | Hitch lock mechanism |
| CN200988494Y (en) * | 2006-12-15 | 2007-12-12 | 中国南车集团武汉江岸车辆厂 | Slide groove mechanism type pull rod device on 120 brake machine relief valve of railway vehicle |
| CN200992216Y (en) * | 2006-12-21 | 2007-12-19 | 中国南车集团武汉江岸车辆厂 | Slide-groove mechanism type pull-rod device in railway train 120 braking machine release valve |
| CN103223954A (en) * | 2013-04-01 | 2013-07-31 | 南车株洲电力机车有限公司 | Foundation brake rigging of railway rolling stock and manually relieving device thereof |
| CN203623708U (en) * | 2013-11-29 | 2014-06-04 | 中国北车集团大连机车车辆有限公司 | Urban railway vehicle air brake manual relieving device |
| CN107499333A (en) * | 2017-09-04 | 2017-12-22 | 中车青岛四方车辆研究所有限公司 | Parking Brake Cylinders hand alleviates device |
| CN107600103A (en) * | 2017-09-12 | 2018-01-19 | 中车唐山机车车辆有限公司 | Air brake hand relieving device |
| CN110949443A (en) * | 2019-12-04 | 2020-04-03 | 中车株洲电力机车有限公司 | Parking brake system for railway vehicle and relieving device thereof |
| CN210793196U (en) * | 2019-10-26 | 2020-06-19 | 洛阳市黄河软轴控制器股份有限公司 | Air brake hand release operating device for railway carriage |
| CN111332329A (en) * | 2018-12-19 | 2020-06-26 | 中车唐山机车车辆有限公司 | Rail vehicle and brake relieving control device thereof |
-
2022
- 2022-01-06 CN CN202210012482.7A patent/CN114394072B/en active Active
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|---|---|---|---|---|
| EP0152816A2 (en) * | 1984-02-23 | 1985-08-28 | Knorr-Bremse Ag | Hand brake control valve for braking systems, in particular of motor vehicles |
| US6065766A (en) * | 1998-10-15 | 2000-05-23 | Pulliam; Randall | Hitch lock mechanism |
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| CN103223954A (en) * | 2013-04-01 | 2013-07-31 | 南车株洲电力机车有限公司 | Foundation brake rigging of railway rolling stock and manually relieving device thereof |
| CN203623708U (en) * | 2013-11-29 | 2014-06-04 | 中国北车集团大连机车车辆有限公司 | Urban railway vehicle air brake manual relieving device |
| CN107499333A (en) * | 2017-09-04 | 2017-12-22 | 中车青岛四方车辆研究所有限公司 | Parking Brake Cylinders hand alleviates device |
| CN107600103A (en) * | 2017-09-12 | 2018-01-19 | 中车唐山机车车辆有限公司 | Air brake hand relieving device |
| CN111332329A (en) * | 2018-12-19 | 2020-06-26 | 中车唐山机车车辆有限公司 | Rail vehicle and brake relieving control device thereof |
| CN210793196U (en) * | 2019-10-26 | 2020-06-19 | 洛阳市黄河软轴控制器股份有限公司 | Air brake hand release operating device for railway carriage |
| CN110949443A (en) * | 2019-12-04 | 2020-04-03 | 中车株洲电力机车有限公司 | Parking brake system for railway vehicle and relieving device thereof |
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| Title |
|---|
| 陈大名.车辆制动钳工 上.北京：中国铁道出版社,1996,第144-146页. * |
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| Publication number | Publication date |
|---|---|
| CN114394072A (en) | 2022-04-26 |
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