Device and method for measuring stroke of air brake basic transmission brake cylinder

Abstract

The invention relates to an air brake foundation transmission brake cylinder stroke measuring device and a measuring method, the air brake foundation transmission brake cylinder stroke measuring device comprises an optical distance measuring sensor, a fixed tube seat and a connecting tee joint, and two ends of the fixed tube seat are respectively in threaded connection with the optical distance measuring sensor and the connecting tee joint. A transmission cable is arranged at one end, far away from the fixed tube seat, of the optical distance measuring sensor, one end, far away from the fixed tube seat, of the connecting tee joint is in threaded connection with a test interface at the rear part of the brake cylinder, and a plug on the test interface can be mounted on another port of the connecting tee joint and seals the port. The plug unscrewed from the test interface can be screwed into the port of the connecting tee joint, so that the plug is prevented from being lost, and the connecting tee joint is sealed by using the plug. The optical distance measuring sensor can monitor the position of the piston in the brake cylinder in real time by sending and receiving optical signals, and stroke data of the brake cylinder can be accurately obtained. Due to the fact that no movable structure exists, the device has the advantages of being high in reliability and stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of railway transportation, in particular to an air brake foundation transmission brake cylinder stroke measuring device and method. BACKGROUND

[0002] In the field of railway freight transportation, the brake cylinder, as an execution component of the air pressure of the brake device into the brake transmission pressure, its running state has a great influence on the safety of the vehicle. The brake cylinder stroke (i.e. the stroke of the piston in the brake cylinder) is a key parameter of the brake device, which is generally set in a relatively narrow stroke range. The air brake valve, the brake shoe gap adjustment device, and the foundation brake device mechanism all have a great influence on the brake cylinder stroke. Monitoring and measuring the brake cylinder stroke can reflect whether the brake device is normal and can also assist in judging the fault of the brake device.

[0003] Generally, when the vehicle is in a static state, the brake cylinder stroke can be measured by a ruler. When the vehicle is running on the line, measuring the brake stroke becomes complex because the vibration and impact of the vehicle running are large. The commonly used pull wire type brake cylinder stroke measuring method is used to measure the brake cylinder stroke. The pull wire type brake cylinder stroke measuring device will be affected by vibration, impact, and dirt pollution of the pull wire after a period of use, and the mechanical movement mechanism casting will be worn out, resulting in unstable measurement accuracy. SUMMARY

[0004] The present application provides an air brake foundation transmission brake cylinder stroke measuring device and method, which uses an optical distance measuring sensor to monitor the brake cylinder stroke. The air brake foundation transmission brake cylinder stroke measuring device is simple in structure and easy to install, and has high reliability and stability.

[0005] In one aspect, the present application provides an air brake foundation transmission brake cylinder stroke measuring device, comprising an optical distance measuring sensor, a fixed pipe seat, and a connecting tee. The two ends of the fixed pipe seat are respectively threadedly connected with the optical distance measuring sensor and the connecting tee. The end of the optical distance measuring sensor away from the fixed pipe seat is provided with a transmission cable. The end of the connecting tee away from the fixed pipe seat is threadedly connected with a test interface at the rear of the brake cylinder. A screw plug on the test interface can be installed on the other port of the connecting tee and seal it.

[0006] In one embodiment, the inside of the fixed pipe seat is further provided with a protection assembly, which comprises a gasket, a glass sheet, and a sealing ring. The two sides of the gasket are respectively connected with the optical distance measuring sensor and the glass sheet. The glass sheet is pressed against the surface of the gasket by the sealing ring.

[0007] In one embodiment, the outer diameter of the glass piece is larger than the inner diameter of the gasket, a first stepped hole is provided in the sealing ring, the glass piece is arranged inside the first stepped hole, and the end face of the sealing ring is connected to the edge of the gasket.

[0008] In one embodiment, a second stepped hole is provided inside the fixed pipe seat, and the sealing ring is disposed in the second stepped hole.

[0009] In one embodiment, a fastening nut is further sleeved on the surface of the optical ranging sensor, and one side of the fastening nut abuts against the end surface of the fixed tube seat.

[0010] In one embodiment, the threads of each port of the connecting tee are tapered pipe threads.

[0011] In one embodiment, the thread of the port where the connecting tee is connected to the test interface is an external thread, and the thread of the port where the connecting tee is connected to the fixed pipe seat and the screw plug is an internal thread.

[0012] In one embodiment, the axis of the optical distance measuring sensor and the moving direction of the piston in the brake cylinder are perpendicular to each other.

[0013] In one embodiment, the optical ranging sensor is connected to a signal receiving device via the transmission cable.

[0014] On the other hand, the present invention also provides a method for measuring the stroke of a basic transmission brake cylinder of an air brake, comprising the following steps: S1. Remove the screw plug from the test port at the rear of the brake cylinder and screw it into one of the ports of the tee. S2. Screw the other end of the connecting tee into the test interface to fix the brake cylinder stroke measuring device to the rear of the brake cylinder; S3, causing the optical ranging sensor to emit a light signal, which is reflected by the piston in the brake cylinder back to the optical ranging sensor, and the optical ranging sensor transmits the information to the signal receiving device via a transmission cable; S4. The signal receiving device determines the piston position by the return time of the light signal, thereby obtaining the stroke data of the brake cylinder. Compared with the prior art, the air brake basic transmission brake cylinder stroke measuring device is installed on the test interface at the rear of the brake cylinder in a threaded connection mode, the installation method is simple, the screw plug screwed off from the test interface can be screwed into the port of the connecting tee, not only avoiding the loss of the screw plug, but also sealing the connecting tee by the screw plug to avoid the impurities from the outside into the connecting tee to adversely affect the light path transmission. After the air brake basic transmission brake cylinder stroke measuring device is removed, the screw plug can be screwed back to the test interface, without affecting the use of the test interface of the brake cylinder. The optical distance measuring sensor can monitor the position of the piston in the brake cylinder in real time by emitting and receiving light signals, so as to accurately obtain the stroke data of the brake cylinder. Since the device has few components and no movable structure, no wear is caused, and the device has the advantages of high reliability and stability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Hereinafter, the present application will be described in more detail based on the embodiments and with reference to the accompanying drawings.

[0016] Figure 1 is a perspective view of a brake cylinder in the embodiment of the present application; Figure 2 is an internal structure diagram of an air brake basic transmission brake cylinder stroke measuring device in the embodiment of the present application; Figure 3 is an exploded view of an air brake basic transmission brake cylinder stroke measuring device in the embodiment of the present application; Figure 4 is a structure diagram of a protection assembly in the embodiment of the present application; Figure 5 is a structure diagram of an air brake basic transmission brake cylinder stroke measuring device and a brake cylinder after connection in the embodiment of the present application; Figure 6 is a structure diagram of an air brake basic transmission brake cylinder stroke measuring device and a brake cylinder after connection in the embodiment of the present application; Figure 7 is a flowchart of an air brake basic transmission brake cylinder stroke measuring method in the embodiment of the present application.

[0017] Reference Signs: 1, optical distance measuring sensor; 2, fixed tube seat; 3, connecting tee; 4, protection assembly; 41, gasket; 42, glass sheet; 43, sealing ring; 5, fastening nut; 100, brake cylinder; 1001, test interface; 1002, screw plug; 1003, piston. DETAILED DESCRIPTION

[0018] The present application will be further described below with reference to the accompanying drawings.

[0019] Example One As Figure 1 shown, the rear of the brake cylinder 100 is provided with a test interface 1001, and the test interface 1001 is provided with a screw plug 1002 for plugging it.

[0020] As Figure 2 shown, the air brake basic transmission brake cylinder stroke measuring device of an embodiment of the application comprises an optical distance measuring sensor 1, a fixed pipe base 2, and a connecting tee 3, both ends of the fixed pipe base 2 are respectively threadedly connected with the optical distance measuring sensor 1 and the connecting tee 3, one end of the optical distance measuring sensor 1 away from the fixed pipe base 2 is provided with a transmission cable, and one end of the connecting tee 3 away from the fixed pipe base 2 is threadedly connected with the test interface 1001 at the rear of the brake cylinder 100, and the screw plug 1002 on the test interface 1001 can be installed on the other port of the connecting tee 3 and seal it.

[0021] The air brake basic transmission brake cylinder stroke measuring device is installed on the test interface 1001 at the rear of the brake cylinder 100 by thread connection, the installation method is simple and convenient for disassembly. The screw plug 1002 screwed off from the test interface 1001 can be screwed into the port of the connecting tee 3, which not only avoids the loss of the screw plug 1002, but also seals the connecting tee 3 by using the screw plug 1002, avoiding the entry of impurities from the outside into the connecting tee 3 to adversely affect the light transmission. After the air brake basic transmission brake cylinder stroke measuring device is disassembled, the screw plug 1002 can be screwed back to the test interface 1001, without affecting the use of the brake cylinder test interface 1001. The optical distance measuring sensor 1 can monitor the position of the piston 1003 in the brake cylinder 100 in real time by emitting and receiving light signals, so as to accurately obtain the stroke data of the brake cylinder 100. Since the device has few components and no movable structure, it will not wear and has the advantages of high reliability and stability.

[0022] In other embodiments, the fixed pipe base 2 and the connecting tee 3 are integrated, thereby omitting the step of connecting the fixed pipe base 2 and the connecting tee 3 together.

[0023] As Figures 2 to 4 shown, the inside of the fixed pipe base 2 is also provided with a protection assembly 4, the protection assembly 4 comprises a gasket 41, a glass sheet 42, and a sealing ring 43, both sides of the gasket 41 are respectively connected with the optical distance measuring sensor 1 and the glass sheet 42, and the glass sheet 42 is tightly pressed on the surface of the gasket 41 by the sealing ring 43. As Figure 5 and Figure 6As shown, when the brake cylinder 100 is filled with air for vehicle braking operation, the pressure air of the brake cylinder 100 will push the piston 1003 of the brake cylinder 100 to move forward for a distance. At the same time, the pressure air flows to the inner hole cavity of the connecting tee 3 and the fixed pipe base 2 through the test interface 1001 of the brake cylinder 100. Through the sealing effect of the protection assembly 4, the pressure air will not affect the optical distance measuring sensor 1, and the optical distance measuring sensor 1 can work stably. In addition, the good sealing can also avoid the leakage of the pressure air, and ensure that the locomotive can obtain effective braking.

[0024] Further, the outer diameter of the glass sheet 42 is greater than the inner diameter of the gasket 41, the sealing ring 43 is provided with a first stepped hole, the glass sheet 42 is arranged in the inside of the first stepped hole, and the end face of the sealing ring 43 is connected with the edge of the gasket 41. The outer diameter of the glass sheet 42 is greater than the inner diameter of the gasket 41, so that the gasket 41 can limit the glass sheet 42. When the optical distance measuring sensor 1 is connected with the fixed pipe base 2, one end of the optical distance measuring sensor 1 will press the gasket 41, so as to press the gasket 41 tightly on the glass sheet 42.

[0025] The gasket 41 and the sealing ring 43 are made of a material with a certain elasticity, and the sealing ring 43 is provided with the first stepped hole, so that the glass sheet 42 can be wrapped in the inside of the sealing ring 43, so that the gasket 41 and the sealing ring 43 can clamp the glass sheet 42 stably, and effectively avoid displacement of the glass sheet 42. At the same time, due to the material of the glass sheet 42, the glass sheet 42 is easy to be damaged, and the wrapping structure provided in the embodiment can provide sufficient buffer, so as to ensure that the glass sheet 42 is not easy to be damaged even in a vibrating environment.

[0026] As shown in Figure 2 and Figure 4 , the inside of the fixed pipe base 2 is provided with a second stepped hole, and the sealing ring 43 is arranged in the second stepped hole. By opening the second stepped hole, the sealing ring 43 can be stably fixed in the inside of the fixed pipe base 2, and the sealing ring 43 is not easy to shake.

[0027] In the embodiment, gaps are arranged between the side wall of the sealing ring 43 and the side wall of the gasket 41 and the inner wall of the fixed pipe base 2, that is, the outer diameter of the sealing ring 43 and the outer diameter of the gasket 41 are both smaller than the inner diameter of the fixed pipe base 2. On the one hand, it is convenient for the installation of the gasket 41 and the sealing ring 43, and on the other hand, it reserves a certain space for the gasket 41 and the sealing ring 43 to be extruded and deformed, so as to avoid that the glass sheet 42 is extruded too much.

[0028] As shown in Figure 2 and Figure 3As shown, the optical ranging sensor 1 is also sleeved with a fastening nut 5, one side of which abuts the end face of the fixed tube base 2. The optical ranging sensor 1 is connected to the fixed tube base 2 via threads, but this detachable connection is not very stable and is prone to loosening, especially in a vibrating environment. Therefore, the threads on the surface of the optical ranging sensor 1 in this embodiment are longer. The excess threads are used to install the fastening nut 5, preventing loosening and improving the reliability of the device.

[0029] The optical distance sensor 1 is provided with an external thread, and the fixed tube base 2 is provided with an internal thread, so that the fixed tube base 2 can wrap the end of the optical distance sensor 1 inside to prevent the optical distance sensor 1 from being affected by dust or other pollutants.

[0030] In this embodiment, the threads of the various ports connecting the tee 3 are all tapered pipe threads, thereby achieving a better sealing effect and avoiding gas leakage.

[0031] Specifically, the threaded portion connecting the connecting tee 3 to the test interface 1001 is external, while the threaded portions connecting the connecting tee 3 to the fixed tube base 2 and the screw plug 1002 are both internal. The screw plug 1002 is provided on the test interface 1001, and the threaded portion at the test interface 1001 is internal, resulting in the threaded portion connecting the connecting tee 3 to the test interface 1001 being external. The internal threaded portion connecting the connecting tee 3 to the fixed tube base 2 ensures that the connecting tee 3 does not encroach on the internal space of the fixed tube base 2, thereby preventing the optical path from being narrowed at the connection.

[0032] like Figure 5 and Figure 6 As shown, the axis of the optical ranging sensor 1 is perpendicular to the moving direction of the piston 1003 in the brake cylinder 100, so that the distance change measured by the optical ranging sensor 1 directly reflects the stroke size of the piston 1003, and the light emitted by the optical ranging sensor 1 can always be received by the optical ranging sensor 1 after being reflected by the piston 1003.

[0033] In this embodiment, the optical ranging sensor 1 is connected to a signal receiving device via a transmission cable. The optical ranging sensor 1 performs only ranging, while the signal receiving device processes and analyzes the relevant data. The monitoring results are displayed for staff to review, allowing them to access the results remotely, greatly improving detection efficiency.

[0034] Example 2 like Figure 7 As shown, an embodiment of the present invention further provides a method for measuring the stroke of a basic transmission brake cylinder of an air brake, comprising the following steps: S1, unscrew the nut 1002 on the rear test interface 1001 of the brake cylinder 100 and screw it into one port of the connecting tee 3; S2, screw the other port of the connecting tee 3 into the test interface 1001 to fix the brake cylinder stroke measuring device at the rear of the brake cylinder 100; S3, make the optical distance measuring sensor 1 emit light signals, the light signals are reflected back to the optical distance measuring sensor 1 by the piston 1003 in the brake cylinder 100, and the optical distance measuring sensor 1 transmits information to the signal receiving device through the transmission cable; S4, the signal receiving device determines the position of the piston 1003 through the return time of the light signals, thereby obtaining the stroke data of the brake cylinder 100.

[0035] The above brake cylinder stroke measuring method uses a small number of components to measure the stroke of the brake cylinder 100, has no movable mechanical structure, has high reliability, can very simply obtain real-time position information of the piston 1003 in the brake cylinder 100, and accurately reflects whether the brake device is normal or not, thereby providing a guarantee for driving safety.

[0036] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An air brake basic transmission brake cylinder stroke measuring device, characterized in that: It includes an optical ranging sensor, a fixed pipe seat and a connecting tee. The two ends of the fixed pipe seat are respectively threadedly connected to the optical ranging sensor and the connecting tee. The end of the optical ranging sensor away from the fixed pipe seat is provided with a transmission cable. The end of the connecting tee away from the fixed pipe seat is threadedly connected to the test interface at the rear of the brake cylinder. The screw plug on the test interface can be installed on the other port of the connecting tee and seal it.

2. The air brake basic transmission brake cylinder stroke measuring device according to claim 1, characterized in that: A protective component is also provided inside the fixed tube seat, and the protective component includes a gasket, a glass sheet and a sealing ring. The two sides of the gasket are respectively connected to the optical ranging sensor and the glass sheet, and the glass sheet is pressed against the surface of the gasket by the sealing ring.

3. The air brake basic transmission brake cylinder stroke measuring device according to claim 2, characterized in that: The outer diameter of the glass piece is larger than the inner diameter of the gasket. A first stepped hole is provided in the sealing ring. The glass piece is arranged inside the first stepped hole. The end face of the sealing ring is connected to the edge of the gasket.

4. The air brake basic transmission brake cylinder stroke measuring device according to claim 3, characterized in that: A second stepped hole is provided inside the fixed pipe seat, and the sealing ring is arranged in the second stepped hole.

5. The air brake basic transmission brake cylinder stroke measuring device according to claim 1, characterized in that: A fastening nut is also sleeved on the surface of the optical distance measuring sensor, and one side of the fastening nut abuts against the end surface of the fixed tube seat.

6. The air brake basic transmission brake cylinder stroke measuring device according to claim 1, characterized in that: The threads of each port of the connecting tee are all tapered pipe threads.

7. The air brake basic transmission brake cylinder stroke measuring device according to claim 6, characterized in that: The thread of the port where the connecting tee is connected to the test interface is an external thread, and the thread of the port where the connecting tee is connected to the fixed pipe seat and the screw plug is an internal thread.

8. The air brake basic transmission brake cylinder stroke measuring device according to claim 1, characterized in that: The axis of the optical distance measuring sensor is perpendicular to the moving direction of the piston in the brake cylinder.

9. The air brake basic transmission brake cylinder stroke measuring device according to claim 1, characterized in that: The optical distance measuring sensor is connected to the signal receiving device through the transmission cable.

10. A method for measuring the stroke of a basic transmission brake cylinder of an air brake, characterized in that: The steps include: S1. Remove the screw plug from the test port at the rear of the brake cylinder and screw it into one of the ports of the tee. S2. Screw the other end of the connecting tee into the test interface to fix the brake cylinder stroke measuring device to the rear of the brake cylinder; S3, causing the optical ranging sensor to emit a light signal, which is reflected by the piston in the brake cylinder back to the optical ranging sensor, and the optical ranging sensor transmits the information to the signal receiving device via a transmission cable; S4. The signal receiving device determines the piston position by the return time of the light signal, thereby obtaining the stroke data of the brake cylinder.

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