CN218640836U - Air braking system of track operation car - Google Patents
Air braking system of track operation car Download PDFInfo
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- CN218640836U CN218640836U CN202222538789.9U CN202222538789U CN218640836U CN 218640836 U CN218640836 U CN 218640836U CN 202222538789 U CN202222538789 U CN 202222538789U CN 218640836 U CN218640836 U CN 218640836U
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Abstract
The utility model relates to an air brake system of track operation car, including air compressor, reservoir, air-vent valve, brake valve, checking cylinder and brake shoe, characterized by: the air brake system comprises an air cylinder, a brake shoe, a pressure sensor, a monitoring alarm and a pressure sensor, wherein the air cylinder is internally provided with the air pressure sensor, the front end of a push rod of a brake cylinder is coaxially fixed with a hollow sleeve, the sleeve is internally provided with the pressure sensor, the sleeve is internally movably inserted with an insertion rod, the tail end of the insertion rod is in contact with the pressure sensor, the brake shoe is fixedly connected with the front end of the insertion rod, the air brake system further comprises the monitoring alarm, and the pressure sensor and the air pressure sensor are both connected with the monitoring alarm. When a driver operates the brake valve to take a braking action, the calibrated air pressure corresponding to the brake pressure value is called according to the detected brake pressure value, and the calibrated air pressure is compared with the detected air pressure in the air cylinder, so that whether the air leakage condition of the brake pipe or the brake cylinder occurs or not can be judged, an alarm signal is sent out when the air leakage occurs, and the potential safety hazard can be eliminated as soon as possible.
Description
Technical Field
The utility model relates to a railcar braking technical field, concretely relates to air brake system of track operation car.
Background
Air braking is a common braking mode for rail vehicles such as trains and work vehicles, and an air braking system is used for braking and decelerating a running train.
Referring to fig. 1, a schematic diagram of a conventional air brake system is shown, and the air brake system includes an air compressor, an air cylinder, a pressure regulating valve, a brake cylinder, and a brake shoe. The brake shoe is arranged on the periphery of a wheel, and is used for being in contact with the wheel, a pressure relay is arranged in the air cylinder, and the pressure relay is connected into a power supply line of the air compressor.
The working principle of the air brake system is as follows: in an initial state, a valve rod of the brake valve is in a neutral position, the brake valve does not charge air or exhaust air to the brake cylinder, the air compressor is started and then delivers compressed air to the air reservoir, the air pressure in the air reservoir begins to rise, and when the air pressure in the air reservoir reaches 900Kpa, the pressure relay is switched from a conducting state to a closing state, so that the air compressor is cut off from a power supply of the air compressor, and the air compressor stops running; the air in the air cylinder is continuously discharged through the exhaust valve, so that the air pressure in the air cylinder is continuously reduced after the air compressor is stopped, and when the air pressure in the air cylinder is lower than 700Kpa, the pressure relay is switched from an off state to an on state, and the air compressor is recovered to run, so that compressed air is supplemented into the air cylinder, and the air pressure in the air cylinder is improved. Therefore, the air pressure in the air cylinder can be kept between 700 and 900Kpa, namely, the air pressure is maintained in the optimal working air pressure interval of the air brake system.
When the vehicle needs to be braked, a valve rod of a brake valve is pushed to a brake position from a neutral position, the brake valve inflates the brake cylinder, the brake valve is changed into a state of inflating the brake cylinder, compressed air flows into the brake cylinder through a brake pipe, a piston driving push rod of the brake cylinder extends outwards (a spring is compressed in the process), so that a brake shoe is in contact with the wheel, and the vehicle is braked by the friction force between the brake shoe and the wheel; when the brake is not needed to be continuously braked, a valve rod of the brake valve is pushed to a release position from a brake position, at the moment, the brake valve is changed from an inflation state to an exhaust state, namely, air in the air reservoir cannot continuously pass through the brake valve, and the spring drives the piston to return back and reset so that the air in the brake cylinder begins to be exhausted through an exhaust hole of the brake valve, and the brake shoe is separated from the wheel; when the brake cylinder is restored to the initial state, the valve rod of the brake valve is pushed back to the neutral position, and the air brake system returns to the initial state.
In fact, after the air brake system is operated for a long time, the brake pipe between the brake valve and the brake cylinder may leak due to aging and corrosion, and if a braking action is taken at this time, the air pressure for driving the piston is reduced, so that the pressure between the brake shoe and the wheel is reduced, and the braking effect of the brake shoe on the wheel is reduced. When the air leakage is small, the influence on the braking performance is small during braking, and a driver cannot sense the reduction of the braking performance from the deceleration feeling of the brake, so that the air leakage condition cannot be found in time.
If the air leakage condition can be detected when the brake pipe or the brake cylinder leaks air, the potential safety hazard can be found as soon as possible.
SUMMERY OF THE UTILITY MODEL
Based on the above, the utility model provides an air brake system of track operation car can detect the gas leakage condition when brake pipe or checking cylinder appear leaking gas.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
an air brake system of a rail working vehicle comprises an air compressor, an air cylinder, a pressure regulating valve, a brake cylinder and a brake shoe, and is characterized in that: the pneumatic brake system is characterized in that an air pressure sensor is arranged in the air cylinder, a hollow sleeve is coaxially fixed at the front end of a push rod of the brake cylinder, a pressure sensor is installed in the sleeve, an inserting rod is movably inserted in the sleeve, the tail end of the inserting rod is in contact with the pressure sensor, the brake shoe is fixedly connected with the front end of the inserting rod, a limiting mechanism used for preventing the inserting rod from being separated from the pressure sensor is further arranged between the sleeve and the inserting rod, the pneumatic brake system further comprises a monitoring alarm, and the pressure sensor and the air pressure sensor are both connected with the monitoring alarm.
As a preferable scheme: the limiting mechanism comprises a first connecting block, a second connecting block and a locking bolt, the first connecting block is fixed with the outer wall of the sleeve, the connecting block is fixedly connected with the insertion rod, the first connecting block is located behind the second connecting block, and the locking bolt penetrates through the second connecting block and is in threaded connection with the first connecting block.
As a preferable scheme: the locking bolt is sleeved with an elastic pad, and the elastic pad is located between the bolt head of the locking bolt and the second connecting block.
As a preferable scheme: the elastic pad is a rubber pad or a silica gel pad.
As a preferable scheme: the outer side of the locking bolt is further provided with a swing rod, the tail end of the swing rod is rotatably connected with the second connecting block, a positioning block is fixed on the side wall of the bolt head of the locking bolt, and a positioning groove is formed in the top of the positioning block and used for the swing rod to enter.
As a preferable scheme: and a magnet block is fixed on the oscillating bar, and the positioning block is made of a magnetic material.
As a preferable scheme: the cable-passing device is characterized in that a wire-passing hole is formed in the side wall of the sleeve, a cable of the pressure sensor penetrates out of the wire-passing hole, a sealing cover is further mounted at the wire-passing hole and covers the wire-passing hole, and the cable of the pressure sensor penetrates through the sealing cover.
As a preferable scheme: the monitoring alarm comprises a main control module, an alarm module, a communication module and a power module, wherein the alarm module, the communication module and the power module are connected with the main control module, and the air pressure sensor and the pressure sensor are connected with a sampling signal port of the main control module.
As a preferable scheme: the communication module is a 3G/4G/5G communication module or a GSM module.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
according to the system, the pressure detection mechanism is arranged between the brake cylinder and the brake shoe, the air pressure sensor is installed in the air cylinder, when a driver operates the brake valve to perform braking action, the calibrated air pressure corresponding to the brake pressure value is called according to the detected brake pressure value, the calibrated air pressure is compared with the detected air pressure in the air cylinder, and therefore whether the air leakage condition of the brake pipe or the brake cylinder occurs or not can be judged, an alarm signal is sent out when the air leakage occurs, and the potential safety hazard can be eliminated as early as possible.
Drawings
FIG. 1 is a schematic diagram of a conventional air brake system;
fig. 2 is a schematic structural view of an air brake system in the present embodiment;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is an enlarged view of portion B of FIG. 3;
FIG. 5 is a schematic structural diagram of a positioning block in the present embodiment;
fig. 6 is a schematic circuit diagram in the present embodiment.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an air compressor; 2. an air reservoir; 3. a pressure regulating valve; 4. a brake valve; 5. a brake pipe; 6. a brake cylinder; 7. a piston; 8. a push rod; 9. a spring; 10. brake shoes; 11. a wheel; 12. a pressure relay; 13. a sleeve; 14. a plug rod; 15. a pressure sensor; 16. a wire passing hole; 17. a sealing plug; 18. a cable; 19. a first connection block; 20. a second connecting block; 21. a locking bolt; 22. a swing rod; 23. a hinge; 24. a magnet block; 25. positioning a block; 26. an elastic pad; 27. positioning a groove; 28. an air pressure sensor.
Detailed Description
Referring to fig. 2, an air brake system of a railway working vehicle includes an air compressor 1, an air cylinder 2, a pressure regulating valve 3, a brake valve 4, a brake cylinder 6, and a brake shoe. An air outlet of the air compressor 1 is connected with an air inlet of an air cylinder 2 through a pipeline, an air outlet of the air cylinder 2 is connected with one end of a pressure regulating valve 3 through a pipeline, one end of the pressure regulating valve 3 is connected with one end of a brake valve 4 through a pipeline, one end of the brake valve 4 is communicated with the interior of a brake cylinder 6 through a brake pipe 5, a spring 9 for driving a piston 7 to return is arranged in the brake cylinder 6, the tail end of a push rod 8 of the brake cylinder 6 is connected with the piston 7, a brake shoe is fixed at the front end of the push rod 8, the brake cylinder 6 is arranged on the periphery of a wheel 11 and is used for being in contact with the wheel 11, and a pressure relay 12 and an air pressure sensor 28 are arranged in the air cylinder 2.
The pressure relay 12 is connected to the supply line of the air compressor 1.
Referring to fig. 3, a hollow sleeve 13 is coaxially fixed at the front end of a push rod 8 of a brake cylinder 6, a pressure sensor 15 is installed in the sleeve 13, a wire passing hole 16 is formed in the side wall of the sleeve 13, a cable 18 of the pressure sensor 15 penetrates out of the wire passing hole 16, an insertion rod 14 (i.e., the insertion rod 14 and the sleeve 13 are not connected into a whole) is movably inserted in the sleeve 13, the tail end of the insertion rod 14 is in contact with the pressure sensor 15, a brake shoe is fixedly connected with the front end of the insertion rod 14, and a limiting mechanism for preventing the insertion rod 14 and the pressure sensor 15 from being separated is further arranged between the sleeve 13 and the insertion rod 14.
In this embodiment, a sealing cover 17 is further installed at the wire through hole 16, the sealing cover 17 is fastened to the wire through hole 16, and the cable 18 of the pressure sensor 15 passes through the sealing cover 17. The sealing cover 17 can ensure the sealing performance at the wire through hole 16 and prevent water or dust from entering the sleeve 13 from the wire through hole 16.
The limiting mechanism in this embodiment includes a first connecting block 19, a second connecting block 20 and a locking bolt 21, wherein the first connecting block 19 is fixed to the outer wall of the casing 13, the second connecting block 20 is fixed to the insertion rod 14, the first connecting block 19 is located behind the second connecting block 20, a threaded hole (not shown) adapted to the locking bolt 21 is formed in the first connecting block 19, a through hole (not shown) is formed in the second connecting block 20, the through hole is coaxial with the threaded hole, and the adjusting bolt passes through the through hole and is screwed into the threaded hole. The structure can limit the insertion rod 14 and prevent the insertion rod 14 from being separated from the pressure sensor 15; and after the locking bolt 21 is unscrewed and taken off, the plugging rod 14 can be conveniently pulled out forwards, and then the pressure sensor 15 can be taken out, so that the pressure sensor 15 can be conveniently overhauled and replaced at the later stage.
Referring to fig. 4 and 5, in the present embodiment, a swing link 22 is further disposed at an outer side of the locking bolt 21, and a tail end of the swing link 22 is rotatably connected to the second connecting block 20 through a hinge 23. A positioning block 25 is fixed on the side wall of the head of the locking bolt 21, a positioning groove 27 is formed at the top of the positioning block 25, and the positioning groove 27 is used for the swing rod 22 to enter. The swing rod 22 swings upwards to the rear of the second connecting block 20, the tail end of the insertion rod 14 is inserted into the sleeve 13, the first connecting block 19 is connected with the second connecting block 20 through the locking bolt 21, the locking bolt 21 is screwed to a certain tightness (at the moment, the tail end of the insertion rod 14 is effectively contacted with the pressure sensor 15), then the locking bolt 21 is subjected to fine adjustment, the positioning block 25 rotates along with the bolt head of the locking bolt 21, and when the positioning block 25 rotates to the position right in front of the hinge 23, the positioning groove 27 is just positioned on the swing path of the swing rod 22; the rocker 22 is then pivoted forward until the rocker 22 enters the positioning slot 27. After the swing rod 22 enters the positioning groove 27, the locking bolt 21 can be locked in the rotation direction, and the locking bolt 21 is limited to rotate, so that the locking bolt 21 is prevented from being loosened due to vibration during running of the rail vehicle, and the tail end of the insertion rod 14 is ensured to be always in effective contact with the pressure sensor 15.
In this embodiment, the swing link 22 is in interference fit with the positioning slot 27, and when the swing link 22 enters the positioning slot 27, the swing link 22 is tightly squeezed with the positioning slot 27, so that the swing link 22 is stably maintained in the positioning slot 27.
On the basis, a magnet block 24 is fixed on the swing rod 22, a positioning block 25 is made of steel, and the positioning block 25 is welded and fixed on the bolt head of the locking bolt 21. Because the positioning block 25 has magnetic conductivity, after swinging into the positioning slot 27, the magnet block 24 is attracted with the positioning block 25, and the swing rod 22 can be more stably and reliably kept in the positioning slot 27 by magnetic force.
As shown in fig. 4, in this embodiment, an elastic pad 26 is further sleeved on the locking bolt 21, the elastic pad 26 is located between the head of the locking bolt 21 and the second connecting block 20, when the locking bolt 21 is screwed in place, the elastic pad 26 is extruded and deformed to generate backward elastic extrusion force on the second connecting block 20, and when the sleeve 13, the pressure sensor 15, and the plugging rod 14 are slightly deformed due to thermal expansion and cold contraction, the elastic pad 26 is deformed therewith, so as to compensate for deformation caused by thermal expansion and cold contraction, and ensure that the tail end of the plugging rod 14 is always in effective contact with the pressure sensor 15.
The elastic pad 26 in this embodiment is a rubber pad or a silicone pad.
Referring to fig. 6, the air brake system further includes a monitoring alarm, which includes a main control module, an alarm module, a communication module, and a power module.
The main control module is a singlechip module, and the alarm module is connected with the I/O end of the main control module; the communication module is connected with a communication serial port of the main control module; the pressure sensor 15 and the gas sensor are connected with the sampling signal input end of the main control module, and the power supply module is connected with the power supply interfaces of the modules and the sensors and used for supplying power.
Before the air brake system operates, the corresponding relation between the air pressure (namely the air pressure of the air cylinder 2) and the brake pressure (namely the pressure of the brake shoes on the wheels 11) needs to be tested and calibrated. For example, when the wind pressure is 700Kpa, the brake pressure is A1 Newton; when the wind pressure is 750Kpa, the calibration data of A2 Newton … … is stored in the main control module, and the air brake system can be put into operation after calibration is completed.
When the air brake system is operated, the pressure sensor 15 detects pressure in real time and outputs a pressure detection signal to the main control module, and the air pressure sensor 28 detects air pressure in the reservoir 2 in real time and outputs an air pressure detection signal to the main control module.
When a driver operates the brake valve 4 to take a braking action, the push rod 8 drives the insertion rod 14 to move forwards, the pressure sensor 15 is extruded by the push rod 8 and the insertion rod 14 when the brake shoe is in contact with the wheel 11, the pressure detection signal starts to be increased obviously at the moment, the main control module reads corresponding calibration air pressure according to the pressure signal at the moment and compares the calibration air pressure with the currently detected air pressure value of the air cylinder 2, when the current pressure is greater than the latter and the difference value between the two exceeds a preset threshold value, the brake pipe 5 or the brake cylinder 6 is considered to be leaked, and the main control module controls the alarm module to send out an alarm signal at the moment, so that the driver can find the leakage situation in time, and the potential safety hazard can be eliminated as soon as possible.
The communication module in this embodiment is a 3G/4G/5G communication module or a GSM module, and when an air leak occurs, the main control module controls the communication module to send alarm information to the background monitoring system, so that the background scheduling and operation and maintenance department can know the abnormal condition in time.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. An air brake system of a rail working vehicle comprises an air compressor, an air cylinder, a pressure regulating valve, a brake cylinder and a brake shoe, and is characterized in that: the pneumatic brake system is characterized in that an air pressure sensor is arranged in the air cylinder, a hollow sleeve is coaxially fixed at the front end of a push rod of the brake cylinder, a pressure sensor is installed in the sleeve, an inserting rod is movably inserted in the sleeve, the tail end of the inserting rod is in contact with the pressure sensor, the brake shoe is fixedly connected with the front end of the inserting rod, a limiting mechanism used for preventing the inserting rod from being separated from the pressure sensor is further arranged between the sleeve and the inserting rod, the pneumatic brake system further comprises a monitoring alarm, and the pressure sensor and the air pressure sensor are both connected with the monitoring alarm.
2. An air brake system for a rail working vehicle according to claim 1, wherein: the limiting mechanism comprises a first connecting block, a second connecting block and a locking bolt, the first connecting block is fixed with the outer wall of the sleeve, the connecting block is fixedly connected with the insertion rod, the first connecting block is located behind the second connecting block, and the locking bolt penetrates through the second connecting block and is in threaded connection with the first connecting block.
3. An air brake system for a rail working vehicle according to claim 2, wherein: the locking bolt is sleeved with an elastic pad, and the elastic pad is located between the bolt head of the locking bolt and the second connecting block.
4. An air brake system for a rail working vehicle according to claim 3, wherein: the elastic pad is a rubber pad or a silica gel pad.
5. An air brake system for a rail working vehicle according to claim 2, wherein: the outer side of the locking bolt is further provided with a swing rod, the tail end of the swing rod is rotatably connected with the second connecting block, a positioning block is fixed on the side wall of the bolt head of the locking bolt, and a positioning groove is formed in the top of the positioning block and used for the swing rod to enter.
6. An air brake system for a rail working vehicle according to claim 5, wherein: and a magnet block is fixed on the oscillating bar, and the positioning block is made of a magnetic material.
7. An air brake system for a rail working vehicle according to claim 1, wherein: the cable-passing device is characterized in that a wire-passing hole is formed in the side wall of the sleeve, a cable of the pressure sensor penetrates out of the wire-passing hole, a sealing cover is further mounted at the wire-passing hole and covers the wire-passing hole, and the cable of the pressure sensor penetrates through the sealing cover.
8. An air brake system for a rail working vehicle according to claim 1, wherein: the monitoring alarm comprises a main control module, an alarm module, a communication module and a power module, wherein the alarm module, the communication module and the power module are connected with the main control module, and the air pressure sensor and the pressure sensor are connected with a sampling signal port of the main control module.
9. An air brake system for a rail working vehicle according to claim 8, wherein: the communication module is a 3G/4G/5G communication module or a GSM module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222538789.9U CN218640836U (en) | 2022-09-21 | 2022-09-21 | Air braking system of track operation car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222538789.9U CN218640836U (en) | 2022-09-21 | 2022-09-21 | Air braking system of track operation car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218640836U true CN218640836U (en) | 2023-03-17 |
Family
ID=85493078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222538789.9U Active CN218640836U (en) | 2022-09-21 | 2022-09-21 | Air braking system of track operation car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218640836U (en) |
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2022
- 2022-09-21 CN CN202222538789.9U patent/CN218640836U/en active Active
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