Before installing the vehicle reducer of the reducer, especially in the reconstruction of the existing hump, you should first contact the maintenance department. Because the automatic hump requires the use of special adjustment machines, the maintenance department should replace the adjustment machine or make partial modifications to the ordinary locomotive, so that the shunting locomotive can pass safely when the reducer is relieved. During the installation process of the reducer, the fulcrum of the brake caliper and the base should be in basic contact with the support point, and the bolts on the brake rail should be tightened to the same extent, so that the force is even. The fastening bolts are made of loose bolts and high-strength adhesive. The bolts are not loose and prevent the brake rails from breaking. The brake rails must be smooth and free from uneven deformation. When the inner and outer sides are in the braking and relieving position, the openings must meet the inner and outer sides in the braking and relieving position respectively. The top of the brake rails to the top surface of the basic rails cannot be larger than 83 mm. T JK 6s and 0. 5s. To be used, the brakes and the mitigation time must be no more than 0. 6s and 0. 5s. It is particularly emphasized that in the operation and production, the push speed should be reduced for the long hook heavy truck group, and the speed reducer should be prevented from being in the braking state for a long time under the high load state, thereby damaging the overall structure of the reducer.
2 Air compressor installation air compressor is randomly operated with the use of compressed air. Its working condition directly affects the operation of the entire speed control system. In addition to the construction of the base according to the design standards and requirements, the base must be leveled during installation to prevent the air compressor from resonating during operation and destabilizing its stability.
In particular, the signal power supply design specification requires that the power supply used by the signal equipment be safe and reliable regardless of whether the external power supply is stable, and the system power supply can automatically realize the phase failure protection of the three-phase power supply to ensure that the air compressor is automatically disconnected when the external power supply is out of phase. Stop, avoid the motor's instantaneous loss of pressure and burn out.
In the operation practice, in order to reduce the frequent start and stop of the air compressor, the frequency conversion control system can be adopted. According to the principle that the rotational speed is proportional to the pump air volume and the third speed of the rotational speed is proportional to the output power, under the premise of ensuring safe air supply, the PLC programmable controller selects the appropriate frequency conversion point and the lower frequency conversion limit, so that the air compressor starts to start. When the motor power frequency is gradually increased from 0 to 50 Hz, the signal speed of the motor to the railway is increased, and the starting current is gradually increased from 0 to 200A. There is no large current surge at the start. This not only ensures the reliable start of the air compressor, but also ensures the safe operation of the air compressor.
3 Installation of high-pressure pipelines The construction of air-pressure pipelines should meet several important conditions: 1 The seamless steel pipe must be cleaned as required before installation, and the weld bead 2 should be removed in time to ensure that the air-pressure pipeline should be in accordance with 1‰～5‰. Slope installation, at the lowest point, the installation of the drainage valve drainage 3 must be carried out before the normal use of the pressure system, the water pressure is pressurized to the rated working pressure of 1.25 times, with a 1kg wooden hoe to the pipe, especially the welded part Knocking, observing whether there is any abnormality and maintaining the water pressure for more than 15 minutes. 4 After the water pressure test is completed, the pipeline system is repeatedly blown with compressed air of the working pressure of less than 50, and the water, rust and carbon dust in the pipeline are discharged. Pipes, test with white paper at the discharge port, until there is no stain, 5 with electric idling and reducer for testing.
After the system is opened for use, the maintenance unit should always check the working status of the reducer and the air-to-air switch, including: whether the conversion time is timed out, whether the air-to-air valve is beating and humming, and the cleanliness in the air centrifuge water reservoir. In combination with the frequency of use of the equipment, the equipment supplier should cooperate with the guidance for about one month after opening, and inspect, clean, repair and repair the cylinders and air valves of the reducer and the electric air compressor. According to the maintenance situation and the state of use of the equipment, the experience of maintenance and operation is gradually accumulated, which can eliminate the safety hazards and accidents caused by the pollution of the gas path and the failure of some parts.
4 system speed control test system equipment installed in place, the important job is to carry out the test. The test conditions: First, the interlocking and control system of the indoor simulation is correct. Second, the air compressor system works normally. Third, the test of each unit circuit (electromagnetic pedal, radar speed measurement, power frequency measurement length, and brake rail operation) is normal.
1. Hump-slide car group automatically controls. The automatic control of the approach is achieved by the sneak block occupying the track section. The key to the test is the commissioning of the brake relief of the reducer. The speed control function of the reducer is to realize the speed control of the slippery vehicle group by the closed loop system composed of the radar speed measuring, the computer speed control module and the speed reducer by the attendant giving the exit speed.
2. System debugging. In order to ensure the reliable operation of the track circuit, for the new track of the new hump, the shunting plan should be prepared first, and the single-machine repeated pressure is used to sharpen the rail to ensure reliable branching of the track circuit. In order to ensure the safety of the rolling test, at the rear end of the reducer exit, the trainer gets on the vehicle and performs manual braking to prepare the iron shoe brake at the appropriate position of the marshalling line to prevent the vehicle from slipping out of the marshalling line after the speed reducer fails. Bad groupings at the end of the field. Because the brake rail is rusted and partially embossed when it is used for the first time, the slamming of the brake car will cause the line to be off the line, and the liquid will move back and forth in the tank after the tanker brakes, which will cause the reducer to duplicate. The mitigation causes the tanker to be clamped on the reducer, and the next hook may collide with it on the reducer, causing damage to the new equipment. Therefore, it is necessary to apply a little butter to the entrance of the brake rail so that the slippery vehicle can smoothly enter the brake rail.
The slippery car group should use the heavy truck group (mainly with flat-plate coal-loading vehicles), and the single-hook test should be carried out one by one for the stock road during the rolling test. The speed of the first hook through the hump should not exceed 5km / h, the exit speed of the reducer of one part should be controlled at about 10km / h, the entrance speed of the reducer of the train to the two parts should not exceed 15km / h, and then test whether the exit speed is satisfied. Given the standard. After the test was completed, a continuous slip test of the whole hump field was carried out. On the one hand, accurate test data can be obtained, on the other hand, it can be ensured. By braking the heavy truck, the wheel pair of the vehicle is equivalent to one time of uniform grinding, so that the brake rail can achieve smooth and smooth requirements at one time.
5 Conclusions Due to the change of the relay time characteristics, the setting of the time characteristic of the computer speed control module, and the change of the working state of the reducer and the electro-pneumatic switch solenoid valve, the timing of the operation of the reducer and the electro-pneumatic switch machine will be affected, resulting in a slippery car. The group slips through the wrong track, and the speed regulation accuracy of the reducer does not meet the requirements of the specified speed, so that the car group opens the sunroof, affects the ability to de-edit, or does not brake at all, so that the car group can not be safely hanged, damaged or even damaged. Sliding out of the marshalling line, causing a driving accident. The smoothness of the marshalling line and the change of the impedance of the ballast will directly affect the idle length of the marshalling line measured by the computer, reduce the efficiency of the de-coupling operation, and cause safety hazards to the slipping operation.
In view of the failures in the actual installation, commissioning and operation of the automatic hump signal system, in addition to timely handling, the daily maintenance personnel should also do the following: understand the basic principles of the system, be familiar with the interface circuit, and master the test points of each interface of the computer. Standard potential (7 ~ 8V), the standard frequency of the radar, the normal linear range of the power frequency measurement voltage, the time from the computer output command to the receipt of the execution command to cause the state change. Manual test and computer print execution method can be used to judge whether the brake plate, radar, relay, solenoid valve, channel fault, or setting data value can not reflect the actual situation on the site, so take corresponding measures to eliminate the fault and make the system normal work.
2 Air compressor installation air compressor is randomly operated with the use of compressed air. Its working condition directly affects the operation of the entire speed control system. In addition to the construction of the base according to the design standards and requirements, the base must be leveled during installation to prevent the air compressor from resonating during operation and destabilizing its stability.
In particular, the signal power supply design specification requires that the power supply used by the signal equipment be safe and reliable regardless of whether the external power supply is stable, and the system power supply can automatically realize the phase failure protection of the three-phase power supply to ensure that the air compressor is automatically disconnected when the external power supply is out of phase. Stop, avoid the motor's instantaneous loss of pressure and burn out.
In the operation practice, in order to reduce the frequent start and stop of the air compressor, the frequency conversion control system can be adopted. According to the principle that the rotational speed is proportional to the pump air volume and the third speed of the rotational speed is proportional to the output power, under the premise of ensuring safe air supply, the PLC programmable controller selects the appropriate frequency conversion point and the lower frequency conversion limit, so that the air compressor starts to start. When the motor power frequency is gradually increased from 0 to 50 Hz, the signal speed of the motor to the railway is increased, and the starting current is gradually increased from 0 to 200A. There is no large current surge at the start. This not only ensures the reliable start of the air compressor, but also ensures the safe operation of the air compressor.
3 Installation of high-pressure pipelines The construction of air-pressure pipelines should meet several important conditions: 1 The seamless steel pipe must be cleaned as required before installation, and the weld bead 2 should be removed in time to ensure that the air-pressure pipeline should be in accordance with 1‰～5‰. Slope installation, at the lowest point, the installation of the drainage valve drainage 3 must be carried out before the normal use of the pressure system, the water pressure is pressurized to the rated working pressure of 1.25 times, with a 1kg wooden hoe to the pipe, especially the welded part Knocking, observing whether there is any abnormality and maintaining the water pressure for more than 15 minutes. 4 After the water pressure test is completed, the pipeline system is repeatedly blown with compressed air of the working pressure of less than 50, and the water, rust and carbon dust in the pipeline are discharged. Pipes, test with white paper at the discharge port, until there is no stain, 5 with electric idling and reducer for testing.
After the system is opened for use, the maintenance unit should always check the working status of the reducer and the air-to-air switch, including: whether the conversion time is timed out, whether the air-to-air valve is beating and humming, and the cleanliness in the air centrifuge water reservoir. In combination with the frequency of use of the equipment, the equipment supplier should cooperate with the guidance for about one month after opening, and inspect, clean, repair and repair the cylinders and air valves of the reducer and the electric air compressor. According to the maintenance situation and the state of use of the equipment, the experience of maintenance and operation is gradually accumulated, which can eliminate the safety hazards and accidents caused by the pollution of the gas path and the failure of some parts.
4 system speed control test system equipment installed in place, the important job is to carry out the test. The test conditions: First, the interlocking and control system of the indoor simulation is correct. Second, the air compressor system works normally. Third, the test of each unit circuit (electromagnetic pedal, radar speed measurement, power frequency measurement length, and brake rail operation) is normal.
1. Hump-slide car group automatically controls. The automatic control of the approach is achieved by the sneak block occupying the track section. The key to the test is the commissioning of the brake relief of the reducer. The speed control function of the reducer is to realize the speed control of the slippery vehicle group by the closed loop system composed of the radar speed measuring, the computer speed control module and the speed reducer by the attendant giving the exit speed.
2. System debugging. In order to ensure the reliable operation of the track circuit, for the new track of the new hump, the shunting plan should be prepared first, and the single-machine repeated pressure is used to sharpen the rail to ensure reliable branching of the track circuit. In order to ensure the safety of the rolling test, at the rear end of the reducer exit, the trainer gets on the vehicle and performs manual braking to prepare the iron shoe brake at the appropriate position of the marshalling line to prevent the vehicle from slipping out of the marshalling line after the speed reducer fails. Bad groupings at the end of the field. Because the brake rail is rusted and partially embossed when it is used for the first time, the slamming of the brake car will cause the line to be off the line, and the liquid will move back and forth in the tank after the tanker brakes, which will cause the reducer to duplicate. The mitigation causes the tanker to be clamped on the reducer, and the next hook may collide with it on the reducer, causing damage to the new equipment. Therefore, it is necessary to apply a little butter to the entrance of the brake rail so that the slippery vehicle can smoothly enter the brake rail.
The slippery car group should use the heavy truck group (mainly with flat-plate coal-loading vehicles), and the single-hook test should be carried out one by one for the stock road during the rolling test. The speed of the first hook through the hump should not exceed 5km / h, the exit speed of the reducer of one part should be controlled at about 10km / h, the entrance speed of the reducer of the train to the two parts should not exceed 15km / h, and then test whether the exit speed is satisfied. Given the standard. After the test was completed, a continuous slip test of the whole hump field was carried out. On the one hand, accurate test data can be obtained, on the other hand, it can be ensured. By braking the heavy truck, the wheel pair of the vehicle is equivalent to one time of uniform grinding, so that the brake rail can achieve smooth and smooth requirements at one time.
5 Conclusions Due to the change of the relay time characteristics, the setting of the time characteristic of the computer speed control module, and the change of the working state of the reducer and the electro-pneumatic switch solenoid valve, the timing of the operation of the reducer and the electro-pneumatic switch machine will be affected, resulting in a slippery car. The group slips through the wrong track, and the speed regulation accuracy of the reducer does not meet the requirements of the specified speed, so that the car group opens the sunroof, affects the ability to de-edit, or does not brake at all, so that the car group can not be safely hanged, damaged or even damaged. Sliding out of the marshalling line, causing a driving accident. The smoothness of the marshalling line and the change of the impedance of the ballast will directly affect the idle length of the marshalling line measured by the computer, reduce the efficiency of the de-coupling operation, and cause safety hazards to the slipping operation.
In view of the failures in the actual installation, commissioning and operation of the automatic hump signal system, in addition to timely handling, the daily maintenance personnel should also do the following: understand the basic principles of the system, be familiar with the interface circuit, and master the test points of each interface of the computer. Standard potential (7 ~ 8V), the standard frequency of the radar, the normal linear range of the power frequency measurement voltage, the time from the computer output command to the receipt of the execution command to cause the state change. Manual test and computer print execution method can be used to judge whether the brake plate, radar, relay, solenoid valve, channel fault, or setting data value can not reflect the actual situation on the site, so take corresponding measures to eliminate the fault and make the system normal work.
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