CN202101839U - Testing device of air braking valve - Google Patents

Testing device of air braking valve Download PDF

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Publication number
CN202101839U
CN202101839U CN2011200221472U CN201120022147U CN202101839U CN 202101839 U CN202101839 U CN 202101839U CN 2011200221472 U CN2011200221472 U CN 2011200221472U CN 201120022147 U CN201120022147 U CN 201120022147U CN 202101839 U CN202101839 U CN 202101839U
Authority
CN
China
Prior art keywords
valve
gas circuit
gas
system valve
empty
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.)
Expired - Lifetime
Application number
CN2011200221472U
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Chinese (zh)
Inventor
刘作琪
陆啸秋
朱飞
邹辉
王杰
田爱凤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Zhongche Town Haitai Brake Equipment Co Ltd
China State Railway Group Co Ltd
Original Assignee
Transport Bureau of the Ministry of Railways
Nanjing Puzhen Haitai Brake Equipments Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Transport Bureau of the Ministry of Railways, Nanjing Puzhen Haitai Brake Equipments Co Ltd filed Critical Transport Bureau of the Ministry of Railways
Priority to CN2011200221472U priority Critical patent/CN202101839U/en
Application granted granted Critical
Publication of CN202101839U publication Critical patent/CN202101839U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a testing device of an air braking valve. The device comprises a gas supplying device, an air passage regulating device, an air passage controlling device, an air braking valve tooling and a pressure testing sensor, wherein the gas supplying device is used for providing gas; the air passage regulating device is used for regulating the pressure of the gas in an air passage, and the air passage regulating device and the gas supplying device are connected by the air passage; the air passage controlling device is used for controlling the working of the air passage regulating device, and the air passage controlling device and the air passage regulating device are connected; the air braking valve tooling is used for installing an air braking valve to be tested, and the air braking valve tooling and the air passage regulating device are connected by the air passage; and the pressure testing sensor is used for testing the pressure of an air outlet of the air braking valve to be tested, and the pressure testing sensor and the air braking valve tooling are connected. According to the testing device of the air braking valve, which is provided by the utility model, the performance of the air braking valve can be tested, so that the performance of the air braking valve installed onto a braking system can be ensured, and the inconvenience brought by replacement caused because the requirement is not met after the air braking valve is installed onto the braking system is avoided.

Description

Empty system valve test device
Technical field
The utility model relates to the valve test technology, particularly relates to a kind of empty system valve test device.
Background technology
Along with making constant progress of railway technology, the speed of motor-car operation, the security of operation and comfortableness require increasingly high, and therefore, the performance requirement of each parts is also increasingly high in the motor-car.
Brake system is the key device in the motor-car; The quality of brake system braking ability directly affects stability, security and the comfortableness of motor-car operation; And the various empty system valve in the brake system; For example slide and prevent that valve, pressure-regulating valve, electromagnetic conversion formula pressure-regulating valve, non-return valve, gas path plate from being the critical component that guarantees the brake system reliability service with non-return valve, draining valve etc., and those empty system valves are pneumatic control component, quality of those empty system valve performances; Directly affect the brake system performance, and then influence stability, security and the comfortableness of motor-car operation.And how to guarantee to be installed to the performance of the sky system valve of brake system; Lacking corresponding apparatus at present detects; After sky system valve is installed to brake system, when the performance of brake system is detected, can't meet the demands if find the performance of brake system; Then need find out the sky system valve that does not meet the demands, with its sky system that meets the demands valve of dismantling and more renewing.
To sum up, empty system valve need dismantled and change to existing empty system valve if empty system valve can't meet the demands, again after being assembled into brake system, make troubles for the Installation And Test of brake system.
The utility model content
The utility model provides a kind of empty system valve test device, can before being assembled into brake system, test sky system valve, guarantees to be assembled into the performance of the sky system valve of brake system.
The utility model provides a kind of empty system valve test device, comprising:
The gas supply device of gas is provided;
Regulate the gas circuit regulating device of gaseous tension in the gas circuit, be connected through gas circuit between said gas circuit regulating device and the said gas supply device;
Control the gas circuit control device of said gas circuit adjustment device work, said gas circuit control device is connected with said gas circuit regulating device;
The sky system valve frock of empty system valve to be measured is installed, and said empty the system between valve frock and the said gas circuit regulating device is connected through gas circuit;
Test the pressure test sensor of the gas outlet pressure of said empty system valve to be measured, said pressure test sensor is connected with said empty system valve frock.
In the above-mentioned sky system valve test device, said gas supply device comprises:
With the reservoir that extraneous source of the gas is connected, be provided with filtrator between said reservoir and the extraneous source of the gas.
In the above-mentioned sky system valve test device, said gas circuit regulating device comprises:
Regulate the proportioning valve of gas circuit pressure;
The solenoid valve of control gas path on-off, said solenoid valve are connected on the gas circuit between said proportioning valve and the said empty system valve frock.
In the above-mentioned sky system valve test device, the quantity of said proportioning valve and solenoid valve is at least two.
Above-mentioned sky system valve test device also can comprise:
Gas path plate is arranged on the gas circuit between said gas circuit regulating device and the empty system valve frock.
Above-mentioned sky system valve test device also can comprise:
Sky to be measured to being installed on the said empty system valve frock is made the sky system valve clamp device that valve clamps.
In the above-mentioned sky system valve test device, said gas circuit control device is the industrial computer with control function, perhaps is manual overvide.
The sky system valve test device that the utility model provides; Through gas circuit regulating device and the gas circuit control device that is provided with; Input air pressure in the time of can effectively simulating empty system valve real work to be measured, thereby the air pressure environment can effectively simulate empty system valve real work to be measured the time, simultaneously; Can detect the output pressure of empty system valve to be measured when simulation air pressure environment is worked down through the pressure test sensor; Thereby confirming according to testing result whether empty system valve performance to be measured meets the demands, and can before sky system valve is installed to brake system, the performance to sky system valve detect, all is that the satisfactory sky of performance is made valve with the sky system valve of guaranteeing to be installed to brake system; Avoid dismantling again because of sky system valve is undesirable and changing the inconvenience that brings, guarantee the serviceability of brake system.
Description of drawings
Fig. 1 is the structural representation of the empty system of the utility model valve test device embodiment one;
Fig. 2 is the schematic layout pattern of the empty system of the utility model valve test device embodiment two.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer; To combine the accompanying drawing among the utility model embodiment below; Technical scheme among the utility model embodiment is carried out clear, intactly description; Obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the empty system of the utility model valve test device embodiment one.As shown in Figure 1; The empty system of present embodiment valve test device comprises: gas supply device 1, gas circuit regulating device 2, gas circuit control device 3, empty system valve frock 4 and pressure test sensor 5; Wherein, gas supply device 1 is used to the gas that empty system valve test device provides test usefulness; Be connected through gas circuit between gas circuit regulating device 2 and the gas supply device 1, be used for regulating the gas circuit gaseous tension; Gas circuit control device 3 is connected with gas circuit regulating device 2, is used to control 2 work of gas circuit regulating device, so that regulate the pressure of gas circuit and the break-make of gas circuit; Empty system valve frock 4 is connected with gas circuit regulating device 2 gas circuits, is used to install empty system valve to be measured; Pressure test sensor 5 is connected with empty system valve frock 4, is used to test the gas outlet pressure of empty system valve to be measured.Gas circuit environment when the present embodiment proving installation can be simulated empty system valve real work to be measured; Make empty system valve to be measured under this environment, to work; And through the test empty gaseous tension of making the gas outlet of valve to be measured; Confirm whether empty system valve performance to be measured satisfies the real work demand, thereby can guarantee effectively that the sky system valve performance that is installed in the motor-car brake system can satisfy the braking needs, avoid because of the defective inconvenience that need carry out demolition and replacement and bring of sky system valve.
In the present embodiment, as shown in Figure 1, above-mentioned gas supply device 1 comprises: reservoir 11 and filtrator 12, and wherein, reservoir 11 is connected with extraneous source of the gas; Filtrator 12 is connected between reservoir 11 and the extraneous source of the gas, and the gas that is used for the input of source of the gas to external world filters, and with the degree of purity of the gas that guarantees to get into reservoir 11, guarantees the accuracy of empty system valve test to be measured.
In the present embodiment, as shown in Figure 1, above-mentioned gas circuit regulating device 2 comprises: proportioning valve 21 and solenoid valve 22; Wherein, be connected through gas circuit between proportioning valve 21 and the reservoir 11, be used for gas circuit is carried out stepless voltage regulation; Particularly; Can regulate suitable air pressure according to empty system valve awp environment to be measured, meet its awp environment so that get into the pressure of the air intake opening of empty system valve to be measured; Solenoid valve 22 is connected on the gas circuit between proportioning valve 21 and the empty system valve frock 4; Be used to control the break-make of gas circuit; After empty system valve to be measured is installed to sky system valve frock 4, just open when testing through these solenoid valve 22 control gas circuits, be that the empty air intake opening of making valve to be measured feeds air pressure.In the present embodiment; Can come the work of control ratio valve 21 and solenoid valve 22 through gas circuit control device 3; And gas circuit control device 3 can be a computer controlling center; Can be according to the empty demand of making valve to be measured, control ratio valve 21 makes the pressure that get into empty system valve to be measured satisfy the air pressure of test request, with the accuracy of raising test and the convenience of operation.
In the present embodiment, free system valve clamp device 6 can be set also,, guarantee empty system valve mounting stability to be measured and fastness, guarantee the accuracy of test so that the to be measured empty system valve that is installed on the empty system valve frock 4 is clamped.
It will be understood by those skilled in the art that; In the practical application, can make the air intake opening quantity of valve according to sky to be measured, and gas outlet quantity; The gas circuit of suitable quantity and the pressure test sensor of suitable quantity are set, so that the real work performance of empty system valve to be measured is tested.Wherein, The quantity of described reservoir, proportioning valve, solenoid valve also can be set, for example according to actual needs; For the sky system valve that number of different types can be provided can carry out on a proving installation; The gas circuit of suitable quantity can be set, and each gas circuit all can have independent reservoir, proportioning valve and solenoid valve etc., to guarantee the accuracy of each gas circuit air pressure; Simultaneously, empty system valve frock also can be set according to actual needs, and can connect the sky system valve frock that satisfies the requirement of different empty system valve through gas path plate.
In the present embodiment, can gas circuit regulating device 2 and empty system valve frock 4 between gas circuit be provided with gas path plate 7, like this; When having a plurality of control gas circuit, the gas circuit of suitable quantity can be set, on gas path plate 7 so that be connected with each control gas circuit; Thereby can sky system valve frock and each control gas circuit be coupled together through this gas path plate 7; Like this, making valve to different skies to be measured, the air intake opening quantity of empty system valve for example to be measured etc.; Can be connected to through the gas that this gas path plate 7 is sent reservoir here on the sky system valve frock that empty system valve to be measured is installed, so that adapt to the test of the empty system of polytype valve.
In addition, in the present embodiment, inquire about, proofread for ease of result to each empty system valve test; Also can be provided with data acquisition center, the collection of the sky system valve that can be in real time the pressure test sensor test be obtained also stores, and the test condition that can be provided with according to reality; Judge whether empty system valve performance meets the demands; Particularly, this data acquisition center can be realized by computer controlling center, when computer controlling center is controlled gas circuit; Can gather the test result of pressure test sensor in real time, and in the database of storage foundation above that.
In the present embodiment; Through gas circuit control device, gas supply device and gas circuit regulating device, can effectively simulate the air intake opening air pressure conditions of empty system valve when being installed in the motor-car brake system, and can be through the working condition of empty system valve under this condition; Particularly; Can be through the on-the-spot range estimation of staff, or judge automatically through computer controlling center, confirm the performance practical requirement whether of the sky system valve of test.
Test with the B10 pressure-regulating valve in the brake system of existing motor-car describes below.The B10 pressure-regulating valve is the sky system valve that is used for control system pressure in the brake system; Its structure mainly can comprise supply valve part, vent valve part and pressure adjustment member; When it is tested, then need control the air intake opening of the gaseous tension of the given 785kPa of gas circuit regulating device to the B10 pressure-regulating valve, treat after a period of stabilisation; The test signal of the pressure test sensor that is connected with its gas outlet through the computer controlling center collection; Obtain the pressure test result of B10 pressure-regulating valve gas outlet, this test result is stored in the database, and on display, shows; Simultaneously; This computer controlling center also can be according to the performance parameter of setting, and the gas outlet pressure performance that for example requires the B10 pressure-regulating valve is between 585kPa~495kPa, and then test result pressure is in the performance parameter scope of this setting; Just show that this B10 pressure-regulating valve performance meets the requirements; Otherwise, do not meet the demands, test again after need adjusting it.
To sum up; The empty system of the utility model embodiment valve test device through gas circuit regulating device and the gas circuit control device that is provided with, can effectively be simulated empty input air pressure when making the valve real work to be measured; Thereby the air pressure environment in the time of can effectively simulating empty system valve real work to be measured; Simultaneously, can detect empty system valve to be measured at the simulation air pressure environment output pressure during work down through the pressure test sensor, thereby confirm according to testing result whether the empty valve performance of making to be measured meets the demands; Can, sky system valve the performance to sky system valve detect before being installed to brake system; With the sky system valve of guaranteeing to be installed to brake system all are the satisfactory empty system valves of performance, avoid dismantling again because of sky system valve is undesirable and changing the inconvenience that brings, and guarantee the serviceability of brake system.
Fig. 2 is the schematic layout pattern of the empty system of the utility model valve test device embodiment two.As shown in Figure 2; The present embodiment proving installation comprises: test board 10 and control desk 20; Wherein, Test board 10 comprises gas circuit platform 101 and tooling platform 102, and gas circuit platform 101 comprises: proportioning valve 1011, solenoid valve 1012, reservoir 1013, filtrator 1014, gas path plate 1015 and pressure test sensor 1016; Tooling platform 102 comprises empty system valve frock 1021, and the frock clamp 1022 that is used with sky system valve frock 1021; Control desk 20 comprises industrial computer 201; This industrial computer 201 is connected with proportioning valve 1011, solenoid valve 1012 and pressure test sensor 1016; Being used for Comparative Examples valve 1011 controls with solenoid valve 1012; Regulate the break-make of gas circuit pressure and gas circuit, also can be used for gathering the to be measured empty output pressure of making valve that pressure test sensor 1016 is gathered in real time, judge whether empty system valve performance to be measured meets the demands.
In the present embodiment; All connect between proportioning valve 1011, solenoid valve 1012, reservoir 1013, filtrator 1014 and the gas path plate 1015 through gas circuit; Is connected through gas circuit between gas path plate 1015 and the empty system valve frock 1021, and pressure test sensor 1016 makes between the valve frock 1021 with sky and also is connected through gas circuit, wherein; Empty system valve frock 1021 is provided with and the empty interface of making the corresponding connection of air intake opening and gas outlet of valve to be measured; Therefore, pressure test sensor 1016 can be connected with the corresponding interface on the sky system valve frock 1021, to test the empty pressure of making the gas outlet of valve to be measured.
In the present embodiment, industrial computer 201 can be controlled proportioning valve on the gas circuit platform 101 1011 and magnetic valve 1012 control assemblies such as grade based on preset or manual command, and receives the pressure test result of pressure test sensor 1016; Simultaneously, industrial computer 201 also can be stored in the pressure test result who collects in the database, so that the test result of sky system valve is inquired about, checked; In addition, industrial computer 201 also can utilize the pressure test result to confirm whether the sky system valve of test meets the demands, thereby whether the sky system valve of confirming test can directly be applied in the brakes based on the decision condition that is provided with.
In this enforcement, as shown in Figure 2, also can be provided with printer 202 on the control desk 20; Like this, can utilize the test result of the sky system valve of 202 pairs of tests of printer to print, so that the staff checks, checks test data; Wherein, Test data can comprise the gaseous tension of the entering empty system valve to be measured that proportioning valve 1011 is regulated, and the output gas pressure of empty system valve to be measured, and whether the sky system valve that makes the staff can determine test according to this test data meets the requirements.In addition, also can be provided with supply unit 203 on the control desk 20, so that required power supply is provided for each parts.
In the present embodiment; As shown in Figure 2; Also can be provided with manual control detection platform 103 on the test board 10, can be provided with manual operation control panel 1031 on this manual control detection platform 103, particularly; This manual operation control panel 1031 can be touch-screen or hand push button, adjusting knob; So that the staff can on-the-spotly can control proportioning valve on the gas circuit platform 101 1011 and solenoid valve 1012,, help the staff like this and carry out the test condition setting flexibly according to the on-the-spot test situation with the pressure and the break-make of control gas circuit; Simultaneously, for ease of staff's observation test result, also can be manually on the control test board 103 tensimeter 1032 being set, so that staff's Real Time Observation test case.
In the present embodiment; The reservoir quantity that is provided with on the gas circuit platform 101 can for example can comprise the reservoir of the reservoir of the reservoir of the reservoir of 4 1L, 1 13L, 1 11L, 1 7L and the reservoir of 2 2.5L for a plurality of, and the control corresponding parts; Proportioning valve 1011 also can be arranged to a plurality of with solenoid valve 1012; 4 proportioning valves 1011 and the solenoid valve more than 4 or 4 1012 for example can be set, so that a plurality of Different control gas circuits can on gas circuit platform 101, be formed, like this; Can simulate gas circuit environment under the various environment, carry out the test of the sky system valve of number of different types; Simultaneously, the gas circuit of suitable quantity can be set on the gas path plate 1015, the system valve frock 1021 of having leisure can be communicated with corresponding gas circuit on the gas path plate; In addition, pressure test sensor 1016 be provided with quantity also can be provided with according to actual needs a plurality of so that each gas outlet of sky system valve of test is tested.
In the present embodiment; The above-mentioned a kind of layout type that is merely each parts in the empty system of the present embodiment valve test device shown in Figure 2; Concrete connected mode of each parts can be according to actual needs on it; For example the sky system valve kind of test connects into the appropriate control gas circuit, so that sky system valve is made accurately test.
In the practical application, can select suitable sky system valve frock based on sky system valve to be tested; Sky system valve frock is installed on the tooling platform, and after connecting corresponding air gas circuit, can tests sky system valve; Particularly, at first, with stable being installed on the empty system valve frock of sky system valve; Guarantee empty system valve stable installation, firm, bad phenomenon such as gas leakage can not take place; Then, the operation industrial computer, by setting air pressure conditions, control ratio valve and magnetic valve, the air pressure in the adjusting gas circuit get into the air inlet of empty system valve to setting voltage through gas path plate; After the gas circuit conducting, industrial computer can be gathered the pressure of the gas outlet of the sky system valve of testing on the pressure test sensor in real time, obtains the atmospheric pressure that of empty system valve, thereby confirms based on the pressure of this test whether the performance of empty system valve satisfies the demand.
What should explain at last is: above embodiment is only in order to the technical scheme of explanation the utility model, but not to its restriction; Although the utility model has been carried out detailed explanation with reference to previous embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of each embodiment technical scheme of essence disengaging the utility model of relevant art scheme.

Claims (7)

1. an empty system valve test device is characterized in that, comprising:
The gas supply device of gas is provided;
Regulate the gas circuit regulating device of gaseous tension in the gas circuit, be connected through gas circuit between said gas circuit regulating device and the said gas supply device;
Control the gas circuit control device of said gas circuit adjustment device work, said gas circuit control device is connected with said gas circuit regulating device;
The sky system valve frock of empty system valve to be measured is installed, and said empty the system between valve frock and the said gas circuit regulating device is connected through gas circuit;
Test the pressure test sensor of the gas outlet pressure of said empty system valve to be measured, said pressure test sensor is connected with said empty system valve frock.
2. empty system valve test device according to claim 1 is characterized in that said gas supply device comprises:
With the reservoir that extraneous source of the gas is connected, be provided with filtrator between said reservoir and the extraneous source of the gas.
3. empty system valve test device according to claim 1 and 2 is characterized in that said gas circuit regulating device comprises:
Regulate the proportioning valve of gas circuit pressure;
The solenoid valve of control gas path on-off, said solenoid valve are connected on the gas circuit between said proportioning valve and the said empty system valve frock.
4. empty system valve test device according to claim 3 is characterized in that the quantity of said proportioning valve and solenoid valve is at least two.
5. empty system valve test device according to claim 4 is characterized in that, also comprises:
Gas path plate is arranged on the gas circuit between said gas circuit regulating device and the empty system valve frock.
6. empty system valve test device according to claim 1 is characterized in that, also comprises:
Sky to be measured to being installed on the said empty system valve frock is made the sky system valve clamp device that valve clamps.
7. empty system valve test device according to claim 1 is characterized in that said gas circuit control device is the industrial computer with control function, perhaps is manual overvide.
CN2011200221472U 2011-01-24 2011-01-24 Testing device of air braking valve Expired - Lifetime CN202101839U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200221472U CN202101839U (en) 2011-01-24 2011-01-24 Testing device of air braking valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200221472U CN202101839U (en) 2011-01-24 2011-01-24 Testing device of air braking valve

Publications (1)

Publication Number Publication Date
CN202101839U true CN202101839U (en) 2012-01-04

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Application Number Title Priority Date Filing Date
CN2011200221472U Expired - Lifetime CN202101839U (en) 2011-01-24 2011-01-24 Testing device of air braking valve

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102539176A (en) * 2012-02-16 2012-07-04 永济电机天作电气有限责任公司 Single-train test platform of motor train unit
CN105628368A (en) * 2016-03-15 2016-06-01 上海交通大学 Automobile transmission solenoid valve detection device
CN110441001A (en) * 2019-05-20 2019-11-12 北京清佰华通科技有限公司 Automatic gas density test system
CN112985853B (en) * 2021-04-16 2024-05-03 中国铁道科学研究院集团有限公司 Pneumatic testing system for railway vehicle foundation brake product

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102539176A (en) * 2012-02-16 2012-07-04 永济电机天作电气有限责任公司 Single-train test platform of motor train unit
CN105628368A (en) * 2016-03-15 2016-06-01 上海交通大学 Automobile transmission solenoid valve detection device
CN110441001A (en) * 2019-05-20 2019-11-12 北京清佰华通科技有限公司 Automatic gas density test system
CN112985853B (en) * 2021-04-16 2024-05-03 中国铁道科学研究院集团有限公司 Pneumatic testing system for railway vehicle foundation brake product

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C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: CHINA RAILWAY CORPORATION

Free format text: FORMER OWNER: TRANSPORT BUREAU OF RAILWAY DEPARTMENT

Effective date: 20141010

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20141010

Address after: 100844 Fuxing Road, Beijing, Haidian District, No. 10

Patentee after: CHINA RAILWAY CORPORATION

Patentee after: Nanjing Puzhen Haitai Brake Equipment Co., Ltd.

Address before: 100844 Fuxing Road, Beijing, Haidian District, No. 10

Patentee before: Transport Bureau of Railway Department

Patentee before: Nanjing Puzhen Haitai Brake Equipment Co., Ltd.

C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: 100844 Fuxing Road, Beijing, Haidian District, No. 10

Patentee after: CHINA RAILWAY CORPORATION

Patentee after: Nanjing Zhongche town Haitai Brake Equipment Co Ltd

Address before: 100844 Fuxing Road, Beijing, Haidian District, No. 10

Patentee before: CHINA RAILWAY CORPORATION

Patentee before: Nanjing Puzhen Haitai Brake Equipment Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20120104

CX01 Expiry of patent term