Safety protection device of testing machine and motor train unit axle fatigue testing machine

Abstract

The utility model relates to the technical field of railway vehicle manufacturing, in particular to a safety protection device of a testing machine and a motor train unit axle fatigue testing machine. The safety protection device comprises a safety door lock, a safety door, a safety door lock misoperation alarm circuit and a safety door action circuit; the safety door lock misoperation alarm circuit comprises a contactor KM1 and a contactor KM2, a contact of the contactor KM1 is connected with the axle motor main circuit, and a contact of the contactor KM2 is connected with the safety door lock and an alarm BZ2 in series; the safety door action circuit comprises a door machine interlocking alarm mechanism, the safety door is connected with the door machine interlocking alarm mechanism, a switch of the safety door can control the on-off state of the door machine interlocking alarm mechanism, and the door machine interlocking alarm mechanism is connected with an audible and visual alarm BZ1. According to the utility model, operation errors possibly occurring in the operation process of the testing machine are fully considered, the safety performance of the testing machine is greatly improved through cooperative work of multiple systems, and the personal safety of operators is ensured.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle manufacturing technology, and in particular to a safety protection device for a testing machine and a fatigue testing machine for train wheel axles. Background Technology

[0002] The high-speed train wheel and axle fatigue testing machine, as a specialized testing device, is primarily used to test the fatigue performance of high-speed train wheel and axle. This equipment applies periodic loads to the wheel and axle, simulating the stress conditions experienced during actual operation to evaluate its fatigue strength and service life. During operation, the wheel and axle motor of the testing machine rotates at high speed, causing the wheel and axle to vibrate at high frequency. While this process effectively tests the performance of the wheel and axle, it also poses certain safety hazards, especially when testing personnel are near the testing platform, where accidents may occur. Therefore, ensuring the safety of the testing machine during operation is crucial.

[0003] Currently, wheel and axle fatigue testing machines on the market are typically equipped with basic safety protection measures, but these measures have certain limitations. They generally include a simple safety door system, consisting of a safety door, a lock, and some basic electrical components. The safety door is installed around the perimeter of the testing machine to isolate the testing area from the operators. The lock is used to secure the safety door and prevent personnel from accidentally entering the testing area during the test. However, these existing safety door systems are relatively simple in function, only able to prevent personnel from entering the testing area to a certain extent, lacking effective safety warnings and protective mechanisms.

[0004] There is a lack of tight interlock control between the opening / closing status of the safety door and the operating status of the testing machine. When the wheel axle motor is running, if the test personnel attempt to open the safety door, the system cannot issue an alarm in time or take further protective measures. In addition, existing safety door systems typically do not have a dedicated misoperation alarm device, and therefore cannot issue a warning when the test personnel accidentally operate the safety door lock. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model embodiment is to provide a safety protection device for a testing machine. A safety door operation circuit and a safety door lock misoperation alarm circuit are added to the main control circuit of the testing bench. When the wheel axle motor is running, if the user opens the door lock, alarm BZ2 will sound, preventing the user from forcibly opening the safety door while the motor is running. If the safety door is forcibly opened, the motor will stop abruptly. When the wheel axle motor is de-energized, the safety door audible and visual alarm BZ1 will sound, effectively avoiding the risk of injury to the user from the running testing bench.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A safety protection device for a testing machine includes: a safety door lock, a safety door, a safety door lock malfunction alarm circuit, and a safety door operation circuit; the safety door lock malfunction alarm circuit includes contactors KM1 and KM2, the contacts of contactor KM1 are connected to the main circuit of the wheel axle motor, and the contacts of contactor KM2 are connected in series with the safety door lock and alarm BZ2; the safety door operation circuit includes a door interlock alarm mechanism, the safety door is connected to the door interlock alarm mechanism, the opening and closing of the safety door can control the opening and closing state of the door interlock alarm mechanism, and the door interlock alarm mechanism is connected to the audible and visual alarm BZ1.

[0008] Optionally, in the safety door lock misoperation alarm circuit, the coil of contactor KM1 is connected in series with the wheel axle motor start button SB3, and the main contacts of contactor KM1 are connected in series in the main circuit of the wheel axle motor.

[0009] Optionally, in the safety door lock misoperation alarm circuit, the coil of contactor KM2 is connected in parallel with the coil of contactor KM1, the auxiliary contact of contactor KM1 is connected in parallel with the wheel axle motor start button SB3, and is connected in series with the parallel circuit of the coils of contactor KM2 and contactor KM1.

[0010] Optionally, in the safety door lock misoperation alarm circuit, the normally open contact of the contactor KM2 is connected in series with the alarm BZ2 and the safety door lock.

[0011] Optionally, the normally closed contact of the contactor KM2 is connected in parallel with the series circuit of the alarm BZ2 and the normally open contact of the contactor KM2.

[0012] Optionally, the door interlock alarm mechanism includes a relay KA1, the normally open contact of which is connected in series with the audible and visual alarm BZ1. When the safety door is opened, the relay KA1 closes and triggers the audible and visual alarm BZ1.

[0013] Optionally, the door interlock alarm mechanism includes a relay KA2, the normally closed contact of which is connected in series with the main circuit of the wheel axle motor. When the safety door is opened, the relay KA2 is disconnected to de-energize the main circuit of the wheel axle motor.

[0014] Optionally, the safety door operating circuit includes a door operator interlock reset mechanism, which includes a reset button. The reset button is used to restore power to the main circuit of the wheel axle motor after the safety door is closed.

[0015] Optionally, the alarm BZ1 and / or alarm BZ2 are audible and visual alarms.

[0016] This utility model embodiment also provides a high-speed train wheel axle fatigue testing machine, including the safety protection device of the testing machine as described above.

[0017] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0018] 1. The safety protection device of this utility model for the testing machine includes a safety door lock, a safety door, a safety door lock misoperation alarm circuit, and a safety door operation circuit. In the safety door lock misoperation alarm circuit, the contact of KM1 is connected to the main circuit of the wheel axle motor to control the motor's operation. The contact of KM2 is connected in series with the safety door lock and alarm BZ2, forming a circuit path that can promptly issue an alarm when the safety door lock is misoperated. The moment the safety door lock is opened, the BZ2 alarm is triggered, reminding the operator that they are in a dangerous situation. The door interlock alarm mechanism in the safety door operation circuit is closely connected to the safety door. The opening and closing action of the safety door directly determines the on / off state of the door interlock alarm mechanism. If the tester forcibly opens the safety door, the audible and visual alarm BZ1 is energized and activates the alarm function, providing a double safety warning for the test site, while simultaneously forcibly cutting off the main circuit of the wheel axle motor. This design fully considers the possible operational errors that may occur during the operation of the testing machine. Through the coordinated work of multiple systems, it greatly improves the safety performance of the testing machine and ensures the personal safety of the operator.

[0019] 2. The control circuit provided by this utility model has a simple structure, high reliability, and strong practicality. It can effectively achieve interlocking between the test bench and the safety door, effectively preventing the user from opening the safety door while the test bench motor is running, and effectively avoiding the risk of injury to the user from the running test bench.

[0020] Additional advantages of this invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. Furthermore, the spacing or dimensions between components are exaggerated to show their positions; the schematic diagrams are for illustrative purposes only.

[0022] Figure 1 This is the overall electrical schematic diagram provided in this embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the safety door lock misoperation alarm circuit provided in this embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the safety door operating circuit provided in an embodiment of the present invention;

[0025] Figure 4 This is the overall control logic diagram provided in this embodiment of the utility model;

[0026] In the diagram: 1. Safety door lock malfunction alarm circuit; 2. Door machine interlock reset mechanism; 3. Door machine interlock alarm mechanism; 4. Wheel axle motor; Detailed Implementation

[0027] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] like Figure 1 As shown, this embodiment proposes a safety protection device for a testing machine, including: a safety door lock, a safety door, a safety door lock malfunction alarm circuit, and a safety door operation circuit; as shown... Figure 2 As shown, the safety door lock misoperation alarm circuit includes contactors KM1 and KM2. The contacts of contactor KM1 are connected to the main circuit of the wheel axle motor, and the contacts of contactor KM2 are connected in series with the safety door lock and alarm BZ2; Figure 3 As shown, the safety door operation circuit includes a door operator interlocking alarm mechanism. The safety door is connected to the door operator interlocking alarm mechanism. The opening and closing of the safety door can control the opening and closing state of the door operator interlocking alarm mechanism. The door operator interlocking alarm mechanism is connected to the audible and visual alarm BZ1.

[0029] The safety door lock misoperation alarm circuit is controlled by contactors KM1 and KM2. The main contacts of KM1 directly control the on / off state of the wheel axle motor's main circuit, while the normally open contact of KM2 is connected in series with the safety door lock and alarm BZ2, forming a misoperation detection loop. The safety door's operation circuit is linked to the safety door via the door operator interlocking alarm mechanism. The safety door's open / closed state controls the on / off state of the door operator interlocking alarm mechanism, thereby triggering the audible and visual alarm BZ1. While the test bench motor is running, it prevents users from forcibly opening the safety door and entering the test area. When test personnel approach the test bench, the test bench motor stops running, and the alarm sounds. This control circuit has a simple structure, high reliability, and strong practicality, effectively achieving accurate opening control of the safety protection device.

[0030] In the safety door lock misoperation alarm circuit, the coil of contactor KM1 is connected in series with the wheel axle motor start button SB3, and the main contacts of contactor KM1 are connected in series with the wheel axle motor main circuit.

[0031] The coil of contactor KM1 is connected in series with the wheel axle motor start button SB3, while the main contacts of KM1 are connected in series in the main circuit of the wheel axle motor. When the operator presses the SB3 button, current flows through the KM1 coil, energizing it and closing the main contacts, thus providing power to the main circuit of the wheel axle motor and enabling the motor to start normally and enter working condition. This series connection ensures that the main circuit of the wheel axle motor can only be successfully turned on when the wheel axle motor start button SB3 is pressed and the KM1 coil is normally energized, providing a crucial circuit guarantee for the safe operation of the testing machine. Through this precise circuit design, the accidental starting of the wheel axle motor due to misoperation or other abnormal conditions can be effectively prevented, further improving the safety and reliability of the entire testing machine system.

[0032] In the safety door lock misoperation alarm circuit, the coil of contactor KM2 is connected in parallel with the coil of contactor KM1, and the auxiliary contact of contactor KM1 is connected in parallel with the wheel axle motor start button SB3. This parallel combination is then connected in series with the parallel circuit of the KM2 and KM1 coils. When the wheel axle motor start button SB3 is pressed, the KM1 coil is energized, and its auxiliary contact closes, forming a circuit path that allows the KM2 coil to be continuously energized. After the KM2 coil is energized, its contact state changes, thus providing the conditions for triggering the alarm BZ2. This ingenious circuit connection design ensures that once the safety door lock is misoperated after the wheel axle motor starts running, the alarm BZ2 can quickly sound an alarm, promptly reminding the operator that they are in a dangerous situation. By combining the parallel connection of KM1 and KM2 coils with the parallel and series connection of auxiliary contacts, a logically sound and rapidly responsive alarm triggering mechanism is constructed, which effectively improves the safety protection capability of the testing machine during operation and prevents safety accidents caused by operator error.

[0033] In the safety door lock malfunction alarm circuit, the normally open contact of contactor KM2 is connected in series with alarm BZ2 and the safety door lock. The normally closed contact of contactor KM2 is connected in parallel with the series circuit of alarm BZ2 and the normally open contact of contactor KM2.

[0034] When the wheel axle motor is operating normally and the coil of contactor KM2 is energized, the normally open contact of KM2 closes, forming a complete current loop. This allows alarm BZ2 to receive power and enter standby mode. If an operator attempts to open the safety lock with a key, this action will cause current to flow through alarm BZ2, triggering it to sound an alarm. This promptly alerts the operator that the wheel axle motor is currently running and that opening the safety lock poses a potential danger. This series connection ensures that alarm BZ2 will only sound when the safety lock is opened and the normally open contact of KM2 is closed, achieving accurate monitoring and timely warning of misoperation. This ingenious circuit design effectively prevents operators from being injured by accidentally opening the safety lock while the wheel axle motor is running, further enhancing the safety performance and reliability of the testing machine.

[0035] like Figure 3 As shown, the door interlocking alarm mechanism includes a relay KA1, and the normally open contact of the relay KA1 is connected in series with the audible and visual alarm BZ1.

[0036] When the safety door is opened, relay KA1 in the door operator's interlocking alarm mechanism closes mechanically, energizing the audible and visual alarm BZ1 and activating its alarm function. The audible and visual alarm BZ1 emits a strong audible and visual signal to alert on-site operators that the safety door is open and the testing machine is in a dangerous state. This design utilizes the normally open contact characteristic of relay KA1, ensuring that the alarm is triggered rapidly the moment the safety door is opened, promptly warning operators. Through this tight mechanical and electrical interlocking mechanism, direct linkage between the safety door status and the alarm system is achieved, providing a reliable protective barrier for the safe operation of the testing machine and effectively preventing accidents caused by operators approaching the operating testing machine with the safety door open.

[0037] The door interlock alarm mechanism includes a relay KA2, and the normally closed contact of KA2 is connected in series with the main circuit of the wheel axle motor.

[0038] When the safety door is opened, the normally closed contact of relay KA2 in the door interlock alarm mechanism opens, directly cutting off the power supply to the main circuit of the wheel axle motor, preventing the motor from starting or stopping immediately. This design cleverly utilizes the characteristics of the normally closed contact of relay KA2 to quickly cut off the motor power supply the moment the safety door is opened, fundamentally eliminating potential safety hazards to operators during machine operation. Through the coordinated operation of relays KA1 and KA2, not only can an audible and visual alarm be triggered when the safety door is opened, but the power to the main circuit of the wheel axle motor is also ensured, achieving multiple layers of safety protection. This dual-protection mechanism greatly enhances the safety performance of the testing machine, ensuring the absolute safety of operators when the safety door is open and effectively preventing serious accidents caused by misoperation or other unforeseen circumstances.

[0039] The safety door operating circuit includes a door operator interlock reset mechanism, which includes a reset button. The reset button is used to restore power to the main circuit of the wheel axle motor after the safety door is closed.

[0040] This design ensures that the wheel axle motor can only regain power and start operating after the safety door is reliably closed and the operator has actively performed a reset operation. This reset mechanism effectively prevents the wheel axle motor from accidentally starting due to the safety door not being fully closed or operator negligence, further enhancing the safety performance of the testing machine. At the same time, the reset button reminds operators that a reset operation must be performed after each operation, enhancing their safety awareness and ensuring that the safety of the testing machine is fully guaranteed throughout the entire operation process.

[0041] The alarms BZ1 and / or BZ2 are audible and visual alarms. As a common warning device, audible and visual alarms can simultaneously emit sound and light signals when an abnormal situation is detected, in order to attract the attention of operators, thus having a higher warning effect and reducing the risk of safety accidents caused by operators failing to notice the alarm in time.

[0042] Working principle:

[0043] like Figure 4As shown, when the wheel axle motor is running, opening the safety door lock with the key will trigger the safety door lock alarm BZ2, reminding the user that the motor is running and to stop opening the lock. When the wheel axle motor is stopped, opening the safety door lock with the key will not trigger the safety door lock alarm BZ2, allowing the door to be opened. After the user opens the safety door, the audible and visual alarm BZ1 will trigger, and the wheel axle motor will disconnect from the main power supply, preventing it from starting. When the user closes the safety door and locks the safety lock, the audible and visual alarm BZ1 will stop. At this point, the reset button must be pressed to restore power to the wheel axle motor's main power supply before starting the motor.

[0044] Specifically, such as Figure 2 When button SB3 is pressed, coil KM1 is energized, causing the main and auxiliary contacts of KM1 to be powered, and the wheel axle motor to run. Simultaneously, coil KM2 is energized, causing its normally open contact to close and its normally closed contact to open, thus energizing alarm BZ2. When the safety door lock (TBGW-W925T1-2PE1) is opened with a key, alarm BZ2 is triggered. When button SB2 (normally closed) is pressed, coil KM1 is de-energized, causing the main and auxiliary contacts of KM1 to de-energize, thus de-energizing the wheel axle motor. Simultaneously, coil KM2 is de-energized, causing its normally open contact to open and its normally closed contact to close, short-circuiting alarm BZ2. When the safety door lock (TBGW-W925T1-2PE1) is opened with a key, alarm BZ2 will not sound.

[0045] like Figure 3 The safety door operation circuit includes a door interlock alarm mechanism and a door interlock reset mechanism. When the safety door of the wheel axle fatigue testing bench is opened, the door interlock alarm mechanism KA1 closes, energizing the audible and visual alarm BZ1, triggering an audible and visual alarm. KA2 opens, disconnecting the main circuit CH1+ of the wheel axle motor, and the door interlock is also de-energized, preventing the wheel axle motor from starting. When the safety door of the wheel axle fatigue testing bench is closed, the door interlock alarm mechanism KA1 opens, de-energizing the audible and visual alarm BZ1, stopping the audible and visual alarm. KA2 closes. At this time, pressing the door interlock reset button energizes the main circuit CH1+ of the wheel axle motor, allowing the wheel axle motor to start.

[0046] Based on the aforementioned safety protection devices, this embodiment also provides a high-speed train wheel and axle fatigue testing machine. By installing the safety protection device of this invention, it is possible to effectively prevent operators from accidentally opening the safety door or misoperating the safety door lock and entering the danger zone while the wheel and axle motor is running. This provides a safe and reliable working environment for the operators of the high-speed train wheel and axle fatigue testing machine, effectively avoiding personnel injuries and equipment damage caused by misoperation, and ensuring the smooth progress of the test process and the accuracy of the test data.

[0047] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A safety guard for a testing machine, characterized in that, include: Safety door lock, safety door, safety door lock malfunction alarm circuit and safety door operation circuit; The safety door lock misoperation alarm circuit includes contactor KM1 and contactor KM2. The contacts of contactor KM1 are connected to the main circuit of the wheel axle motor, and the contacts of contactor KM2 are connected in series with the safety door lock and alarm BZ2. The safety door operating circuit includes a door operator interlocking alarm mechanism. The safety door is connected to the door operator interlocking alarm mechanism. The opening and closing of the safety door can control the opening and closing state of the door operator interlocking alarm mechanism. The door operator interlocking alarm mechanism is connected to the audible and visual alarm BZ1.

2. Safety guard for a testing machine according to claim 1, characterized in that In the safety door lock misoperation alarm circuit, the coil of contactor KM1 is connected in series with the wheel axle motor start button SB3, and the main contacts of contactor KM1 are connected in series with the wheel axle motor main circuit.

3. Safety guard for a testing machine according to claim 2, characterized in that In the safety door lock misoperation alarm circuit, the coil of contactor KM2 is connected in parallel with the coil of contactor KM1, the auxiliary contact of contactor KM1 is connected in parallel with the wheel axle motor start button SB3, and is connected in series with the parallel circuit of the coils of contactor KM2 and contactor KM1.

4. A safety guard for a testing machine according to claim 3, characterised in that, In the safety door lock malfunction alarm circuit, the normally open contact of the contactor KM2 is connected in series with the alarm BZ2 and the safety door lock.

5. The safety shield for a testing machine of claim 3, wherein, The normally closed contact of the contactor KM2 is connected in parallel with the series circuit of the alarm BZ2 and the normally open contact of the contactor KM2.

6. The safety shield for a testing machine of claim 1, wherein, The door interlocking alarm mechanism includes a relay KA1. The normally open contact of the relay KA1 is connected in series with the audible and visual alarm BZ1. When the safety door is opened, the relay KA1 closes and triggers the audible and visual alarm BZ1.

7. A safety guard for a testing machine according to claim 6, characterised in that, The door interlock alarm mechanism includes a relay KA2. The normally closed contact of KA2 is connected in series with the main circuit of the wheel axle motor. When the safety door is opened, the normally closed contact of the relay KA2 is opened to de-energize the main circuit of the wheel axle motor.

8. The safety shield for a testing machine of claim 1, wherein, The safety door operating circuit includes a door operator interlock reset mechanism, which includes a reset button. The reset button is used to restore power to the main circuit of the wheel axle motor after the safety door is closed.

9. The safety shield for a testing machine of claim 1, wherein, The alarm BZ1 and / or alarm BZ2 are audible and visual alarms.

10. A fatigue testing machine for a wheel axle of a train set, characterized in that, Includes the safety protection device of the testing machine as described in any one of claims 1-9.

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