CN114312719B - System and method for detecting parking brake state of locomotive - Google Patents
System and method for detecting parking brake state of locomotive Download PDFInfo
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- CN114312719B CN114312719B CN202111440564.3A CN202111440564A CN114312719B CN 114312719 B CN114312719 B CN 114312719B CN 202111440564 A CN202111440564 A CN 202111440564A CN 114312719 B CN114312719 B CN 114312719B
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Abstract
The invention discloses a locomotive parking brake state detection system, which comprises a system main air path, a brake cylinder air path, a parking control air path, a two-way valve, a switching valve, a double-linkage plug valve, a first pressure switch and a second pressure switch, wherein the switching valve is arranged on the main air path, a control port of the switching valve is connected with the two-way valve, an inlet of the switching valve is connected with a main air pipe, an exhaust port of the switching valve is communicated with the atmosphere, a first air inlet of the double-linkage plug valve is communicated with the two-way valve, a first air outlet of the double-linkage plug valve is communicated with a brake pipeline of a parking cylinder pipe, the first pressure switch is arranged on the parking cylinder pipe and the brake pipeline of the first air outlet of the double-linkage plug valve, a second air inlet of the double-linkage plug valve is communicated with the main air pipe through the switching valve, and a second air outlet of the double-linkage plug valve is communicated with the second pressure switch.
Description
Technical Field
The invention relates to the technical field of locomotive braking, in particular to a locomotive parking braking state detection system and a method thereof.
Background
Locomotive parking brake condition detection is an important component of locomotive parking braking because parking brake condition detection is related to the safety, reliability and stability of the locomotive.
At present, when a locomotive is parked and braked at home and abroad, in order to prevent the parking brake pressure from being superposed with the brake cylinder pressure, a two-way valve is mostly adopted to compare the brake cylinder pressure with the parking control pipe pressure, the larger value of the two pressures is compared to be used as output, the pressure output provides power for a parking cylinder, and the state feedback of the locomotive parking brake is realized through a pressure switch arranged on a parking brake pipeline.
Therefore, accurate differentiation of parking cylinder pressure from brake cylinder pressure or parking control tube is necessary to detect the true state of parking brake.
Disclosure of Invention
The invention aims to provide a locomotive parking brake state detection system and a method thereof, which are used for accurately distinguishing parking cylinder pressure from brake cylinder pressure or a parking control pipe and detecting the real state of parking brake.
In order to achieve the purpose, the invention adopts the following technical scheme:
a locomotive parking brake state detection system comprises a main air path for connecting a main air pipe, a brake cylinder air path for connecting a brake cylinder, a parking control air path for connecting a parking brake pipe, and a two-way valve, wherein two inlets of the two-way valve are respectively communicated with the brake cylinder air path and the parking control air path, an outlet of the two-way valve is communicated with the main air path, the locomotive parking brake state detection system is characterized by further comprising a switching valve, a double-linkage plug valve, a first pressure switch and a second pressure switch,
the switching valve is arranged on the main air path, a control port of the switching valve is connected with the two-way valve, an inlet of the switching valve is connected with the main air pipe, and an exhaust port of the switching valve is communicated with the atmosphere;
the first air inlet of the double-linkage cock is communicated with the two-way valve, the first air outlet of the double-linkage cock is communicated with the brake pipeline of the parking cylinder pipe, the first pressure switch is arranged on the brake pipeline of the parking cylinder pipe and the first air outlet of the double-linkage cock, the second air inlet of the double-linkage cock is communicated with the main air pipe through the switching valve, and the second air outlet of the double-linkage cock is communicated with the second pressure switch.
Through setting up first pressure switch and second pressure switch to according to the state of first pressure switch and the state of second pressure switch carry out the combination judgement, obtain the pressure source in the jar of parking: when the first pressure switch is closed and the second pressure switch is closed, the pressure in the parking cylinder is derived from the parking brake pipe pressure, and the parking state of the locomotive is parking brake release; when the state of the first pressure switch is closed and the state of the second pressure switch is open, the pressure in the parking cylinder is derived from the brake cylinder pressure, and the parking state of the locomotive is that the parking cylinder has pressure; when the first pressure switch is in an off state and the second pressure switch is in an off state, the parking cylinder is free of pressure, and the parking state of the locomotive is parking brake application.
As a further scheme, the system further comprises a switch display device, the switch display device is communicated with the second pressure switch, and the switch display device prompts the second pressure switch to be switched on or switched off by changing the display state of the switch display device.
As a further scheme, the switch display device is a pneumatic pressure display device, the pneumatic pressure display device comprises a piston and a spring connected with the piston, a display color plate is arranged at the upper end of the piston, the display color plate is provided with a first area and a second area, the first area of the display color plate displays a first color, and the second area displays a second color.
As a further scheme, the display color of the first area of the display color plate is red, and the display color of the second area of the display color plate is green.
As a further aspect, the two-way valve includes a first port in communication with the main air hose through the switching valve, a second port in communication with the brake cylinder, and a third port in communication with the parking brake pipe,
when the pressure of the second port is less than or equal to the pressure of a third port, the third port is communicated with the first port;
when the pressure of the second port is larger than that of the third port, the second port is communicated with the first port.
Corresponding to the locomotive parking brake state detection system, the locomotive parking brake state detection method comprises the following steps:
acquiring the pressure of the parking brake pipe and the pressure of the brake cylinder;
the two-way valve compares the magnitudes of the parking brake pipe pressure and the brake cylinder pressure and outputs the greater to the parking cylinder pipe; the bi-directional valve outputs the parking brake pipe pressure when the parking brake pipe pressure is greater than or equal to the brake cylinder pressure, and outputs the brake cylinder pressure when the parking brake pipe pressure is less than the brake cylinder pressure;
when the delivery pressure of the two-way valve is larger than the switching value of the switching valve, the two-way valve is communicated with the second air inlet of the double-linkage plug valve, and the switching value of the switching valve is larger than the maximum pressure of the brake cylinder and smaller than the pressure of the parking brake pipe when the parking brake is released;
and performing combined judgment according to the state of the first pressure switch and the state of the second pressure switch to obtain a pressure source in the parking cylinder, wherein the method comprises the following specific steps of:
when the state of the first pressure switch is closed and the state of the second pressure switch is closed, the pressure in the parking cylinder is derived from the parking brake pipe pressure, and the parking state of the locomotive is parking brake release;
when the state of the first pressure switch is closed and the state of the second pressure switch is open, the pressure in the parking cylinder is from the brake cylinder pressure, and the parking state of the locomotive is that the parking cylinder has pressure;
when the state of the first pressure switch is off and the state of the second pressure switch is off, the parking cylinder is free of pressure, and the parking state of the locomotive is parking brake application.
As a further aspect, the method is applied to a locomotive parking brake status detection system, the detection system further comprising a switch display device in communication with the second pressure switch, the switch display device having a first color status and a second color status different from the first color status, the method further comprising the steps of:
when the second pressure switch is in an off state, generating and executing a first control instruction to enable the switch display device to be in a first color state;
and when the second pressure switch is in a closed state, generating and executing a second control instruction to enable the second pressure switch to control the switch display device to be in a second color state.
As an alternative, the first color state of the switch display device is red, and the second color state of the switch display device is green.
The invention has the following beneficial effects:
the invention can intuitively detect the real state of the parking brake through the feedback signals of the first pressure switch, the second pressure switch and the switch display device, distinguish that the pressure of the parking cylinder is from a brake cylinder or a parking control pipe, use the total wind pressure as the action source of the second pressure switch, and the pipeline only has two states of pressure and no pressure, and the second pressure switch quickly and accurately reflects the state of the pipeline, thereby avoiding the non-action or false action of the second pressure switch caused by overlarge drift of the set value.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of a parking brake status detection system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a parking brake state detection system with a switch display device according to an embodiment of the present invention;
FIG. 3 is a further schematic diagram of a parking brake status detection system in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a switch display device according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view BB of FIG. 4 illustrating the absence of pressure at the input port of the switch display device according to the embodiment of the present invention;
FIG. 6 is a cross-sectional view of BB of FIG. 4 when pressure is applied to the input port of the switch display device according to the embodiment of the present invention.
Wherein: 1. the brake system comprises a main air pipe, 2, a brake cylinder, 3, a parking brake pipe, 4, a parking cylinder pipe, 10, a two-way valve, 11, a first port of the two-way valve, 12, a second port of the two-way valve, 13, a third port of the two-way valve, 20, a double-linkage plug door, 21, a first air inlet of the double-linkage plug door, 22, a first air outlet of the double-linkage plug door, 23, a second air inlet of the double-linkage plug door, 24, a second air outlet of the double-linkage plug door, 30, a switching valve, 40, a first pressure switch, 50, a second pressure switch, 60, a switch display device, 61, an air inlet of the switch display device, 62, a first area, 63, a second area, 64, a piston, 65 and a spring.
Detailed Description
As shown in fig. 1 to 3, a locomotive parking brake state detection system includes a main air path for connecting a main air pipe 1, a brake cylinder air path for connecting a brake cylinder 2, and a parking control air path for connecting a parking brake pipe 3, and a two-way valve 10, where the two-way valve 10 includes a first port 11, a second port 12, and a third port 13, the first port 11 of the two-way valve 10 is communicated with the main air pipe 1 through a switching valve 30, the second port 12 of the two-way valve 10 is communicated with the brake cylinder 2, the third port 13 of the two-way valve 10 is communicated with the parking brake pipe 3, a control port of the switching valve 30 is connected with the two-way valve 10, an inlet of the switching valve 30 is connected with the main air pipe 1, and an exhaust port of the switching valve 30 is communicated with the atmosphere;
as shown in fig. 3, the dual-linkage plug door 20 includes a first air inlet 21, a first air outlet 22, a second air inlet 23 and a second air outlet 24, the first air inlet 21 of the dual-linkage plug door 20 is communicated with the two-way valve 10, the first air outlet 22 of the dual-linkage plug door 20 is communicated with the brake pipeline of the parking cylinder pipe 4, the first pressure switch 40 is disposed on the brake pipelines of the parking cylinder pipe 4 and the first air outlet 22 of the dual-linkage plug door 20, the second air inlet 23 of the dual-linkage plug door 20 is communicated with the main air pipe 1 through the switching valve 30, and the second air outlet 24 of the dual-linkage plug door 20 is communicated with the second pressure switch 50.
As shown in fig. 2 and 3, the system further includes a switch display device 60, the switch display device 60 is connected to the second pressure switch 50, and the switch display device 60 prompts the closed or open state of the second pressure switch 50 by changing its display state.
As a specific example, as shown in fig. 4, the switch display device 60 is a pneumatic pressure display device. The pneumatic pressure display device comprises a piston 64 and a spring 65 connected with the piston 64, a display color plate is arranged at the upper end of the piston, the display color plate is provided with a first area 62 and a second area 63, the first area of the display color plate displays a first color, the first color can be set to be red, the second area 63 displays a second color, and the first color can be set to be green.
Operation of the switch display device 60:
as shown in fig. 5, when the air inlet 61 has no pressure or sufficient pressure to push the spring 65, the first area 62 of the display panel appears and the display panel shows red;
when the air inlet 61 has sufficient pressure to push the spring 65, the second area 63 of the display panel appears and the display panel appears green, as shown in fig. 6.
The specific implementation mode is as follows:
1) When the parking is relieved, the parking control pipe has pressure, because the pressure of the parking control pipe is greater than the maximum pressure of the brake cylinder, the two-way valve always outputs the pressure of the parking control pipe, one path of the pressure is communicated with the parking cylinder through the double-linkage plug door, the first pressure switch is closed, and high level is output; one way of the control circuit enables the switching valve to act, the total wind flows to the switch display device through the switching valve and the double linkage plug valve, the switch display device displays green, the second pressure switch is closed, and high level is output.
2) When the parking brake is applied, the parking control pipe pressure is 0, which can be divided into 2 cases:
a. the brake cylinder has pressure, the two-way valve outputs the pressure of the brake cylinder, one path of the pressure is communicated with the parking cylinder through the double-linkage plug valve, the first pressure switch 40 is closed, and high level is output; the other path reaches the control port of the switching valve, and since the maximum pressure of the brake cylinder is smaller than the operating value of the switching valve, the switching valve is not operated, the input port of the switch display device has no pressure and is displayed in red, and the second pressure switch 50 is turned off to output a low level.
b. The brake cylinder is not pressurized, the cylinder is not pressurized when being parked, the first pressure switch 40 is turned off to output a low level, the second pressure switch 50 is turned off to output a low level, and the switch display device is red.
Parking brake state
| Parking state | First pressure switch | Second pressure switch | Switch display device |
| Parking brake mitigation | 1 | 1 | Green |
| Parking brake application | 0 | 0 | Red (Red) |
| Pressure in brake cylinder | 1 | 0 | Red (Red) |
Note: "1" represents a high level and "0" represents a low level.
Specifically, the case where the first pressure switch 40 outputs a low level and the second pressure switch 50 outputs a high level does not occur, for example: for example, the operating pressure of the second pressure switch 50 is approximately 480kPa, the operating pressure of the first pressure switch 40 is approximately 120kPa, the operating pressure of the switching valve is approximately 450kPa, and when the output of the first pressure switch 40 is low, the switching valve cannot be opened, and the total duct pressure cannot reach the second pressure switch 50, so that the second pressure switch 50 can only output a low level.
Finally, it should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that those skilled in the art will be able to modify the invention in its various equivalent forms without departing from the scope of the invention as defined in the appended claims.
Claims (7)
1. A locomotive parking brake state detection system comprises a main air path for connecting a main air pipe, a brake cylinder air path for connecting a brake cylinder, a parking control air path for connecting a parking brake pipe, and a two-way valve, wherein two inlets of the two-way valve are respectively communicated with the brake cylinder air path and the parking control air path, and an outlet of the two-way valve is communicated with the main air path;
the first air inlet of the double-linkage cock is communicated with the two-way valve, the first air outlet of the double-linkage cock is communicated with the brake pipeline of the parking cylinder pipe, the first pressure switch is arranged on the brake pipeline of the parking cylinder pipe and the first air outlet of the double-linkage cock, the second air inlet of the double-linkage cock is communicated with the main air pipe through the switching valve, and the second air outlet of the double-linkage cock is communicated with the second pressure switch;
the two-way valve includes a first port in communication with the main air pipe through the switching valve, a second port in communication with the brake cylinder, and a third port in communication with the parking brake pipe, the third port communicating with the first port when a pressure of the second port is less than or equal to a pressure of the third port;
when the pressure of the second port is larger than that of the third port, the second port is communicated with the first port.
2. The locomotive parking brake state detection system of claim 1, further comprising a switch display device, wherein the switch display device is in communication with the second pressure switch, and the switch display device prompts the second pressure switch to be turned on or off by changing its display state.
3. The locomotive parking brake status detection system of claim 2, wherein the switch display device is a pneumatic pressure display device, the pneumatic pressure display device comprises a piston and a spring connected to the piston, the piston is provided with a display panel at an upper end thereof, the display panel has a first area and a second area, the first area of the display panel displays a first color, and the second area displays a second color.
4. The locomotive parking brake status detection system of claim 3, wherein the first region of the display color panel is displayed in a red color and the second region of the display color panel is displayed in a green color.
5. A parking brake state detection method for a locomotive, applied to the parking brake state detection system for a locomotive according to any one of claims 1 to 4, the method comprising the steps of: acquiring the parking brake pipe pressure and the brake cylinder pressure;
comparing the pressure magnitudes of the parking brake pipe pressure and the brake cylinder pressure, the bi-directional valve outputting the parking brake pipe pressure when the parking brake pipe pressure is greater than or equal to the brake cylinder pressure, the bi-directional valve outputting the brake cylinder pressure when the parking brake pipe pressure is less than the brake cylinder pressure;
when the delivery pressure of the two-way valve is greater than the switching value of the switching valve, the two-way valve is communicated with the second air inlet of the double-linkage plug valve, and the switching value of the switching valve is greater than the maximum brake cylinder pressure and less than the parking brake pipe pressure when parking brake release occurs;
and performing combined judgment according to the state of the first pressure switch and the state of the second pressure switch to obtain a pressure source in the parking cylinder, wherein the method comprises the following specific steps of: when the state of the first pressure switch is closed and the state of the second pressure switch is closed, the pressure in the parking cylinder is derived from the parking brake pipe pressure, and the parking state of the locomotive is parking brake release;
when the state of the first pressure switch is closed and the state of the second pressure switch is open, the pressure in the parking cylinder is from the brake cylinder pressure, and the parking state of the locomotive is that the parking cylinder has pressure;
when the state of the first pressure switch is off and the state of the second pressure switch is off, no pressure is applied to the parking cylinder, and the parking state of the locomotive is parking brake application.
6. A method of detecting a parking brake status of a locomotive according to claim 5, wherein said method is applied to a parking brake status detection system of a locomotive, said system further comprising a switch display device in communication with said second pressure switch, said switch display device having a first color status and a second color status different from said first color status, said method further comprising the steps of: when the second pressure switch is in an off state, generating and executing a first control instruction to enable the switch display device to be in a first color state;
and when the second pressure switch is in a closed state, generating and executing a second control instruction to enable the second pressure switch to control the switch display device to be in a second color state.
7. A method for detecting a parking brake status of a locomotive according to claim 6, wherein said first color status of said switch display device is red and said second color status of said switch display device is green.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111440564.3A CN114312719B (en) | 2021-11-30 | 2021-11-30 | System and method for detecting parking brake state of locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111440564.3A CN114312719B (en) | 2021-11-30 | 2021-11-30 | System and method for detecting parking brake state of locomotive |
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| Publication Number | Publication Date |
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| CN114312719A CN114312719A (en) | 2022-04-12 |
| CN114312719B true CN114312719B (en) | 2023-01-20 |
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| CN202111440564.3A Active CN114312719B (en) | 2021-11-30 | 2021-11-30 | System and method for detecting parking brake state of locomotive |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB117647A (en) * | 1917-06-23 | 1918-07-23 | British Thomson Houston Co Ltd | Improvements in and relating to Braking Systems for Electrically Driven Vehicles. |
| CN102963347B (en) * | 2012-11-15 | 2014-08-27 | 南车株洲电力机车有限公司 | Air brake system for automatic program management (APM) vehicle |
| US20140138068A1 (en) * | 2012-11-19 | 2014-05-22 | Solidstate Controls, Llc | Cooling System |
| CN203228772U (en) * | 2013-05-20 | 2013-10-09 | 南车株洲电力机车有限公司 | Display device for brake state of locomotive |
| CN104228804B (en) * | 2014-10-21 | 2016-11-30 | 南车株洲电力机车有限公司 | A kind of Pneumatic brake systems and control method thereof |
| CN104442900A (en) * | 2014-11-20 | 2015-03-25 | 南车资阳机车有限公司 | Integrated multifunctional parking braking system and control method thereof |
| CN106428098B (en) * | 2016-11-18 | 2019-01-25 | 中车长春轨道客车股份有限公司 | A kind of Multifunctional brake alleviates indicator and its control system |
| CN107264500B (en) * | 2017-06-13 | 2019-07-09 | 中车株洲电力机车有限公司 | A kind of locomotive and its double mode braking control system |
| CN111706496B (en) * | 2020-06-18 | 2021-10-26 | 中车株洲电力机车有限公司 | Rail vehicle air source system control device and method |
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