CN2776778Y - Stepless automatic pressure regulating device for brake cylinder of empty and heavy railway vehicle - Google Patents
Stepless automatic pressure regulating device for brake cylinder of empty and heavy railway vehicle Download PDFInfo
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- CN2776778Y CN2776778Y CN 200420060116 CN200420060116U CN2776778Y CN 2776778 Y CN2776778 Y CN 2776778Y CN 200420060116 CN200420060116 CN 200420060116 CN 200420060116 U CN200420060116 U CN 200420060116U CN 2776778 Y CN2776778 Y CN 2776778Y
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 238000005096 rolling process Methods 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 abstract description 9
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000009941 weaving Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 230000009466 transformation Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The utility model discloses a stepless automatic regulating apparatus of railway vehicle empty, heavy duty brake jar pressure, its adjusting valve still links to each other with stepless sensing valve (F) air input pipeline simultaneously to the output pipeline of checking jar (E) output brake pressure air, and the step-down air reposition of redundant personnel branch road of this stepless sensing valve (F) then links to each other with step-down air chamber (C). The adjusting device can automatically and steplessly adjust the pressure of the brake cylinder according to the load condition of the vehicle, so that the brake pressure obtained by the high friction composite brake shoe is always in the optimum state, the brake rates of the vehicle in different load ranges tend to be consistent, the brake requirement can be effectively met, the brake shoe loss can be reduced, and the service lives of the brake shoe and the whole brake system are prolonged; meanwhile, the longitudinal impulse of the train during the mixed weaving of empty and heavy trains is effectively reduced. And the device is convenient to modify and low in cost.
Description
Affiliated technical field
The utility model relates to rolling stock control of braking technical field.
Background technology
Rolling stock is lorry especially, and its load carrying ability alters a great deal, and the brake-pressure that empty wagons glancing impact brake shoe requires is little, otherwise big to the brake shoe damage; And the brake-pressure that requires at loaded vehicle glancing impact brake shoe is big, can effectively brake.The brake system of existing rolling stock can only adopt manually, have grade mode to carry out conversion empty, loaded vehicle, can't realize the automatic stepless conversion of brake-cylinder pressure.Make brake-pressure or excessive easy damage that brake shoe bears or the too small requirement that can not satisfy effective braking; And make have leisure, the longitudinal impulse of train is big during the loaded vehicle shuffling.
Summary of the invention
Purpose of the present invention just provides a kind of rolling stock sky, the stepless automatic regulating apparatus of load brake cylinder pressure, this kind setting device can be according to the load-carrying situation of vehicle, automatic stepless is adjusted the pressure of brake cylinder, the brake-cylinder pressure that makes high friction composite brake shoe obtain is in the suitableeest state all the time, the braking ratio of vehicle in different load-carrying scopes reached unanimity, can effectively satisfy brake request, can reduce the loss of brake shoe again, improve the service life of brake shoe and whole brake system; The longitudinal impulse of train when effectively reducing sky, loaded vehicle shuffling simultaneously.And its repacking is convenient, cost is low.
The present invention solves its technical matters, the technical scheme that is adopted is: a kind of rolling stock sky, the stepless automatic regulating apparatus of load brake cylinder pressure, contain the control cock, auxiliary reservoir, pressure reducing reservoir, adjustment valve, the brake cylinder that link to each other by pipeline in the motor vehicle braking system, its constructional feature is: adjust valve and also link to each other with stepless transducer valve air chargine line simultaneously to the delivery conduit of brake cylinder output brake-pressure air, and the step-down air diverter branch of stepless transducer valve then links to each other with pressure reducing reservoir.
Compared with prior art, the invention has the beneficial effects as follows: stepless transducer valve can induce the different load-carrying situations of train automatically, when load carrying ability is in when fully loaded or heavier, stepless transducer valve be SELF CL brake-cylinder pressure air to the pressure reducing reservoir diverter branch close or the amount of opening very little, the pressure air of brake cylinder output can not or less being diverted in the pressure reducing reservoir, the brake-pressure that high friction composite brake shoe obtains is big, and energy is reliable, actv. is braked loaded vehicle; On the contrary when being in empty wagons or load carrying ability gently the time, stepless transducer valve is promptly logical or the amount of opening is bigger to pressure reducing reservoir pressure air diverter branch standard-sized sheet with the brake-cylinder pressure air automatically, the brake-pressure air of brake cylinder output is diverted in the pressure reducing reservoir maximum or morely, the brake-pressure that high friction composite brake shoe obtains is little, under the situation of guaranteeing effectively braking, reduced the loss of brake shoe, and the takeoff output of integral stop system, the service life of brake shoe and whole brake system prolonged; And to the transformation of the whole brake system of original used car before raising speed, only need set up lower-cost stepless transducer valve and related accessory and get final product, it is transformed conveniently, cost is low.
Above-mentioned stepless transducer valve is fixed on by its installation component on the bolster of bogie of car central authorities or near the car body the bogie truck central authorities, keeps at a certain distance away under the sensor contact of stepless transducer valve buting iron is set, and this buting iron is fixed on the bogie side frame of bogie truck.
Above-mentioned stepless transducer valve can adopt two when installing on vehicle, stepless transducer valve is placed respectively on the bolster or car body of bogie of car both sides, then the step-down fractional flow that the stepless transducer valve of the less side of load-carrying is opened during vehicle unbalance-loading is bigger, its final brake cylinder delivery pressure will be adjusted by the operating mode of the less end of load-carrying, reduce the possibility of a less end wheel flat.
The installation connection mode of two stepless transducer valves of above-mentioned employing can also be: also connect average valve and pressure air chargine line on the pressure air delivery conduit of two stepless transducer valves, after the pressure reducing reservoir air diverter branch of two stepless transducer valves was connected to average valve, the pressure air delivery conduit by average valve linked to each other with pressure reducing reservoir again.Adopt the average valve of existing mature technology can carry out automatic average to the delivery pressure of two stepless transducer valves and handle, brake-cylinder pressure will adjusting by the operating mode of the average load-carrying of two bogie side frames of vehicle.Can eliminate longitudinal direction of car and horizontal unbalance loading and the dynamic unbalance loading when bend moves automatically to the influence of weighing and sensing, prevent mistuning.
Specifically consisting of of above-mentioned stepless transducer valve:
A, valve body, the loam cake of valve body, the piston of the inner chamber of valve body has the sandwich valve in this piston, and there is elongated slot in the bottom bar portion of this piston, and push rod embeds piston bottom connection chamber by resilient pin and links to each other with piston, and the termination that resilient pin exposes then is embedded in the elongated slot of piston; Be provided with push rod spring between piston lower end and the push rod step surface;
B, sensor contact are threadedly connected in the thread cavity of push rod, and push rod lower end outside face cooperates with the body cavity lower seal;
C, body cavity top are provided with upper pressure air input hole and link to each other with the pressure air chargine line of stepless transducer valve, then be provided with pressure reducing reservoir pressure air tap hole and link to each other with the pressure reducing reservoir pressure air branch road of stepless transducer valve below upper pressure air input hole.
The concrete working process of this stepless transducer valve with principle is: because push rod embeds piston bottom connection chamber by resilient pin and links to each other with piston, the termination that resilient pin exposes then is embedded in the elongated slot of piston, therefore piston can be done relative motion along elongated slot and push rod, piston need compress push rod spring when moving downward, under the effect of push rod spring, the piston upward movement resets during release of brake.When vehicle is fully loaded or load-carrying when heavier, pillow spring pressurized is big, amount of deflection is big, and the car body of pillow spring top and the bolster of bogie truck are downwards near bogie truck, and the push rod that also is whole stepless transducer valve and its underpart makes the stroke of piston up-down reduce near buting iron.When the auxiliary reservoir pressure air that the glancing impact control cock is sent here enters brake cylinder through adjusting valve, also move downward through the pressure air chargine line of stepless transducer valve, the body cavity compression piston that upper pressure air input hole enters piston top; But because the stroke limiting of piston, piston can't move to pressure reducing reservoir pressure air tap hole position downwards, or only can move to the position of exposing small part pressure air tap hole.Thereby the pressure reducing reservoir diverter branch can't be opened or the amount of opening is very little, the auxiliary reservoir pressure air of sending here from control cock all enters brake cylinder or only has than small part and branches to pressure reducing reservoir, the air pressure of brake cylinder is maximum or bigger, and high friction composite brake shoe obtains maximum or bigger brake-pressure.
On the contrary, when being in empty wagons or load carrying ability when light, pillow spring amount of deflection is little, and the push rod of stepless transducer valve and its underpart and the distance of buting iron are bigger, the stroke increase of piston up-down.Glancing impact, the pressure air of brake cylinder enters the body cavity on piston top, and compression piston moves downward, because the stroke of piston is not limited or limited little, piston will move to pressure reducing reservoir pressure air tap hole downwards with upper/lower positions, or only cover the position of small part pressure air tap hole.Thereby the pressure reducing reservoir diverter branch is opened fully or the amount of opening is very big, the auxiliary reservoir pressure air of sending here from control cock branches to pressure reducing reservoir maximum or morely, the air pressure of brake cylinder is minimum or less, and high friction composite brake shoe obtains minimum or less brake-pressure.
During release of brake, the sandwich valve that is located in the transducer valve piston makes most of pressure reducing reservoir pressure air discharge from the control cock exhausr port through the brake cylinder path.
So, then realized brake-cylinder pressure by the in proportion automatic stepless adjustment of full weight position to full room, the brake-pressure that makes high friction composite brake shoe obtain is in the suitableeest state all the time.And because sensor contact and buting iron adopt the way of contact seldom, the long service life of sensor contact and buting iron; Also make the utility model to match, make applicability of the present utility model wide with the brake of two pressure direct acting types, indirect acting type and three pressure action types.
Above-mentioned outer ring, piston top is with y-type seal ring, also is with y-type seal ring on the outer ring, bottom of push rod, and piston lower end and body cavity bottom are provided with retracing spring, and envelope has self-locking ring between push rod bottom and sensor contact.Make that like this sealing state at sealing position of the stepless transducer valve of the utility model is good, stable and reliable for performance; Under the effect of retracing spring, piston and push rod in time upwards reset automatically during release of brake, reduce friction, the wearing and tearing of push rod, and are convenient to next glancing impact action; And the relative position of sensor contact and push rod bottom is adjustable and locking, the self-locking of energy.
Above-mentioned sensor contact bottom embedding is pressed with anti-wear gasket.The friction force of sensor contact and buting iron can be reduced the service life of improving the two like this.
Offer plunger shaft in the middle of the loam cake of above-mentioned adjustment valve, show that piston places plunger shaft, the below that shows piston is provided with the back-up ring of captiveing joint with loam cake, shows outside the piston bottom bar portion to be with piston spring, and the lengthwise position of this piston spring is between back-up ring and loam cake inwall top.
Adjust valve and the pressure adjustment of the pressure air of control cock output can be reduced to required pressure, required the brake-cylinder pressure that obtains with the composite brake shoe of adaptive great friction coefficient.The adjustment valve of this kind structure makes the pressure air that comes from pressure reducing reservoir act on the below that shows piston, and air pressure shows the length difference that piston stretches out loam cake not simultaneously, can roughly demonstrate full sky, the full weight of vehicle in view of the above and heavily wait situation in midair.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 1 is the whole gas circuit annexation scheme drawing of the utility model embodiment one.
Fig. 2 is the whole gas circuit principle scheme drawing of the utility model embodiment one.
Fig. 3 is the valve body part sectional structure scheme drawing that stepless transducer valve of the present utility model removes installation component.
Fig. 4 is the semi-sictional view structural representation of adjustment valve of the present utility model.
Fig. 5 is the whole gas circuit annexation scheme drawing of the utility model embodiment two.
Fig. 6 is the whole gas circuit annexation scheme drawing of embodiment three of the present utility model.
The specific embodiment
Embodiment one
Fig. 1-4 illustrates, a kind of specific embodiment of the present invention is: a kind of rolling stock sky, the stepless automatic regulating apparatus of load brake cylinder pressure, contain control cock A, the auxiliary reservoir B, pressure reducing reservoir C, adjustment valve D, the brake cylinder E that link to each other by pipeline in the motor vehicle braking system.Adjust valve D and also link to each other with stepless transducer valve F air chargine line simultaneously to the delivery conduit of brake cylinder E output brake-pressure air, the pressure reducing reservoir pressure air diverter branch of this stepless transducer valve F then links to each other with pressure reducing reservoir C.Stepless transducer valve F is fixed on the bolster of bogie truck of vehicle by its installation component or near the car body the bogie truck, installation component is a prior art, mainly is made of hanger, bolt.Keep at a certain distance away under the sensor contact 13 of stepless transducer valve F buting iron 17 is set, this buting iron 17 is fixed on the bogie side frame of bogie truck.Because the stepless transducer valve F of this example is one, its installation site can be on the bolster of bogie truck of vehicle or the middle part near the car body the bogie truck, thereby in fact buting iron 17 can be a crossbeam or the transverse slat that is fixedly connected on the side frames of bogie truck.
Stepless transducer valve F consists of: a, valve body 9, the loam cake 1 of valve body 9, the piston 2 of valve body 9 inner chambers, in this piston 2 sandwich valve 3 is arranged, there is elongated slot 18 in the bottom bar portion of piston 2, push rod 7 embeds the connection chamber of piston 2 bottoms by resilient pin 6 and links to each other with piston 2, and the termination that resilient pin 6 exposes then is embedded in the elongated slot 18 of piston 2; Be provided with push rod spring 8 between piston 2 lower ends and push rod 7 step surfaces; B, sensor contact 13 are threadedly connected in the thread cavity of push rod 7 bottoms, and push rod 7 lower end outside faces cooperate with valve body 9 inner chamber lower seal; C, valve body 9 inner chamber tops are provided with upper pressure air input hole 19 and link to each other with the pressure air chargine line of stepless transducer valve F, then are provided with the pressure reducing reservoir tap hole 20 that links to each other with stepless transducer valve F pressure reducing reservoir pressure air branch road below upper pressure air input hole 19.
Brake-cylinder pressure when the parameter adjustment of using different elastomeric push rod spring 8 instead and cooperate adjusting valve D can change sky, loaded position at an easy rate to adapt to the needs of all kinds of lorries and bogie truck, makes that this usefulness is novel to have well a comformability widely.
Outer ring, piston 2 top is with y-type seal ring 4, also is with y-type seal ring 10 on the outer ring, bottom of push rod 7, and piston 2 lower ends and valve body 9 inner chamber bottoms are provided with retracing spring 5, in push rod 7 bottoms and 11 envelopes of sensor contact self-locking ring 12 is arranged.Sensor contact 11 bottom embeddings are pressed with anti-wear gasket 13.
The basic structure of adjustment valve D of the present utility model, principle of work and identical with adjustment valve (setting device) with the gas circuit annexation of other parts and applicant's No. 0222785.1 patent in the brake system.In No. 0222785.1 patent, clearly demonstrate: adopt to adjust valve and the air pressure adjustment of control cock output can be reduced to the force value that needs, required the brake-pressure that obtains with the composite brake shoe of adaptive great friction coefficient.
The adjustment valve that the utility model adopts also can be adjusted in No. 0222785.1 patent on the basis of valve and do following improvement: the centre of adjusting the loam cake 31 of valve D offers plunger shaft 36, show that piston 32 places plunger shaft 36, the below that shows piston 32 is provided with the back-up ring 35 of captiveing joint with loam cake 31, show outside the piston 32 bottom bar portions to be with piston spring 34, the lengthwise position of this piston spring 34 is between back-up ring 35 and loam cake 31 inwall tops.Make that like this pressure air that comes from pressure reducing reservoir acts on the below that shows piston, air pressure shows the length difference that piston stretches out loam cake not simultaneously, can roughly demonstrate full sky, the full weight of vehicle in view of the above and heavily wait situation in midair.
Embodiment two
Structure that this is routine and composition and example one are basic identical, uniquely different are: stepless transducer valve F is two, and two stepless transducer valve F place respectively on the bolster or car body of bogie of car both sides.17 of buting iron directly are fixed on respectively on the side frames of bogie truck.
Embodiment three
This example is on the basis of embodiment two, the pressure air chargine line that on the pressure air delivery conduit of two stepless transducer valve F, also connects average valve G, after the pressure reducing reservoir pressure air diverter branch of stepless transducer valve F then was connected to average valve G, the pressure air delivery conduit by average valve G linked to each other with the pressure air of pressure reducing reservoir C again.This average valve G can adopt in the prior art can average processing with the pressure of two input airs, and the various average valve of output average pressuure air.
Control cock A of the present utility model can also be that the utility model can match with lorry principal mode brakes such as 120 types and GK types for 120 valves that generally use on the existing railway truck or GK valve etc.
Claims (8)
1, a kind of rolling stock sky, the stepless automatic regulating apparatus of load brake cylinder pressure, contain the control cock (A), auxiliary reservoir (B), pressure reducing reservoir (C), adjustment valve (D), the brake cylinder (E) that link to each other by pipeline in the motor vehicle braking system, it is characterized in that: adjust valve (D) and also link to each other with stepless transducer valve (F) air chargine line simultaneously, and the step-down air diverter branch of stepless transducer valve (F) then links to each other with pressure reducing reservoir (C) to the delivery conduit of brake cylinder (E) output brake-pressure air.
2, a kind of rolling stock sky according to claim 1, the stepless automatic regulating apparatus of load brake cylinder pressure, it is characterized in that: described stepless transducer valve (F) is fixed on by its installation component on the bolster of bogie truck of vehicle or near the car body the bogie truck, keep at a certain distance away under the sensor contact (13) of stepless transducer valve (F) buting iron (17) is set, this buting iron (17) is fixed on the bogie side frame of bogie truck.
3, the stepless automatic regulating apparatus of a kind of rolling stock empty and load brake-cylinder pressure according to claim 1, it is characterized in that: described stepless transducer valve (F) is two.
4, a kind of rolling stock sky according to claim 3, the stepless automatic regulating apparatus of load brake cylinder pressure, it is characterized in that: the pressure air chargine line that also connects average valve (G) on the air chargine line of described two stepless transducer valves (F), after the pressure reducing reservoir air diverter branch of stepless transducer valve (F) then was connected to average valve (G), the pressure air delivery conduit by average valve (G) linked to each other with pressure reducing reservoir (C) again.
5, a kind of rolling stock sky according to claim 2, the stepless automatic regulating apparatus of load brake cylinder pressure, it is characterized in that: described stepless transducer valve (F) specifically consists of:
A, valve body (9), the loam cake (1) of valve body (9), the piston (2) of valve body (9) inner chamber, sandwich valve (3) is arranged in this piston (2), there is elongated slot (18) in the bottom bar portion of piston (2), push rod (7) embeds the connection chamber of piston (2) bottom by resilient pin (6) and links to each other with piston (2), and the termination that resilient pin (6) exposes then is embedded in the elongated slot (18) of piston (2); Be provided with push rod spring (8) between piston (2) lower end and push rod (7) step surface;
B, sensor contact (13) are threadedly connected in the thread cavity of push rod (7) bottom, and push rod (7) lower end outside face cooperates with valve body (9) inner chamber lower seal;
C, valve body (9) inner chamber top are provided with upper pressure air input hole (19) and link to each other with the pressure air chargine line of stepless transducer valve (F), then are provided with the pressure reducing reservoir pressure air tap hole (20) that links to each other with stepless transducer valve (F) pressure reducing reservoir pressure air branch road in the below of upper pressure air input hole (19).
6, a kind of rolling stock sky according to claim 5, the stepless automatic regulating apparatus of load brake cylinder pressure, it is characterized in that: described piston (2) outer ring, top is with y-type seal ring (4), also be with y-type seal ring (10) on the outer ring, bottom of push rod (7), piston (2) lower end and valve body (9) inner chamber bottom are provided with retracing spring (5), and envelope has self-locking ring (12) between push rod (7) bottom and sensor contact (11).
7, a kind of rolling stock sky according to claim 5, the stepless automatic regulating apparatus of load brake cylinder pressure is characterized in that: described sensor contact (11) bottom embedding is pressed with anti-wear gasket (13).
8, a kind of rolling stock sky according to claim 1, the stepless automatic regulating apparatus of load brake cylinder pressure, it is characterized in that: offer plunger shaft (36) in the middle of the loam cake (31) of described adjustment valve (D), show that piston (32) places plunger shaft (36), the below that shows piston (32) is provided with the back-up ring (35) of captiveing joint with loam cake (31), show outside piston (32) the bottom bar portion to be with piston spring (34), the lengthwise position of this piston spring (34) is positioned between back-up ring (35) and loam cake (31) the inwall top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060116 CN2776778Y (en) | 2004-07-06 | 2004-07-06 | Stepless automatic pressure regulating device for brake cylinder of empty and heavy railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060116 CN2776778Y (en) | 2004-07-06 | 2004-07-06 | Stepless automatic pressure regulating device for brake cylinder of empty and heavy railway vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN2776778Y true CN2776778Y (en) | 2006-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420060116 Expired - Fee Related CN2776778Y (en) | 2004-07-06 | 2004-07-06 | Stepless automatic pressure regulating device for brake cylinder of empty and heavy railway vehicle |
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| CN (1) | CN2776778Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI393647B (en) * | 2006-07-14 | 2013-04-21 | Wabtec Holding Corp | High flow calibration test point |
| CN108482416A (en) * | 2018-06-20 | 2018-09-04 | 南京舜美科技有限公司 | JZ-7 type air damper electronically controlled proportional valve closed loop stepless brake devices |
| CN110422156A (en) * | 2019-08-27 | 2019-11-08 | 天津铁路信号有限责任公司 | Multistage manometer regulator and its application |
| CN113335244A (en) * | 2021-07-01 | 2021-09-03 | 青岛思锐科技有限公司 | Device and method for adjusting empty and heavy vehicle valves of railway vehicle and brake control device |
| CN115179914A (en) * | 2022-07-15 | 2022-10-14 | 眉山中车制动科技股份有限公司 | Two-stage adjusting device and adjusting method for braking empty and heavy railway vehicles |
| CN115214579A (en) * | 2022-07-15 | 2022-10-21 | 眉山中车制动科技股份有限公司 | Railway vehicle braking pressure limiting valve |
| WO2023093685A1 (en) * | 2021-11-29 | 2023-06-01 | 中车山东机车车辆有限公司 | Braking system of rail vehicle with single-axle bogie, vehicle, and method |
-
2004
- 2004-07-06 CN CN 200420060116 patent/CN2776778Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI393647B (en) * | 2006-07-14 | 2013-04-21 | Wabtec Holding Corp | High flow calibration test point |
| CN108482416A (en) * | 2018-06-20 | 2018-09-04 | 南京舜美科技有限公司 | JZ-7 type air damper electronically controlled proportional valve closed loop stepless brake devices |
| CN108482416B (en) * | 2018-06-20 | 2024-04-16 | 南京舜美科技有限公司 | JZ-7 type air brake electric control proportional valve closed loop stepless braking device |
| CN110422156A (en) * | 2019-08-27 | 2019-11-08 | 天津铁路信号有限责任公司 | Multistage manometer regulator and its application |
| CN113335244A (en) * | 2021-07-01 | 2021-09-03 | 青岛思锐科技有限公司 | Device and method for adjusting empty and heavy vehicle valves of railway vehicle and brake control device |
| CN113335244B (en) * | 2021-07-01 | 2022-05-03 | 中车制动***有限公司 | Device and method for adjusting empty and heavy vehicle valves of railway vehicle and brake control device |
| WO2023093685A1 (en) * | 2021-11-29 | 2023-06-01 | 中车山东机车车辆有限公司 | Braking system of rail vehicle with single-axle bogie, vehicle, and method |
| CN115179914A (en) * | 2022-07-15 | 2022-10-14 | 眉山中车制动科技股份有限公司 | Two-stage adjusting device and adjusting method for braking empty and heavy railway vehicles |
| CN115214579A (en) * | 2022-07-15 | 2022-10-21 | 眉山中车制动科技股份有限公司 | Railway vehicle braking pressure limiting valve |
| CN115214579B (en) * | 2022-07-15 | 2023-10-13 | 眉山中车制动科技股份有限公司 | Brake pressure limiting valve for railway vehicle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |