Overspeed switch testing device

Abstract

The utility model relates to an overspeed switch testing device, and belongs to the technical field of testing equipment. According to the technical scheme, a frame (1) comprises an upper layer and a lower layer, a motor (4) is installed on the lower layer of the frame (1), a frequency converter (2) and an alarm device box (3) are installed on the upper layer of the frame (1), an overspeed switch (6) is fixedly connected with the output end of the motor (4) through a coupler (5), the input end of the motor (4) is connected with the frequency converter (2), and the overspeed switch (6) is connected with the alarm device box (3). The beneficial effects of the utility model are that the frequency converter is adjusted to control the rotating speed of the motor to reach an overspeed switch limit value so as to determine the overspeed switch performance, thereby effectively satisfying the inspection test requirements of the equipment safety protection device, providing effective technical support for equipment safety protection and equipment fault prevention, ensuring the complete protection function, and improving the reliability. Therefore, the equipment fault risk is reduced.

Description

Technical Field

[0001] This utility model relates to an overspeed switch testing device, belonging to the technical field of testing equipment. Background Technology

[0002] An overspeed switch is an important safety protection device used to detect overspeed of hoisting motors, pitching motors, and yard crane hoisting motors. The overspeed switch is connected to the motor or drum via a coupling. When the motor speed exceeds the set limit of the overspeed switch, the normally closed contact of the overspeed switch opens, triggering a motor stop interlock and simultaneously activating the motor's hardware circuit protection, de-energizing the motor and thus protecting it.

[0003] Since the hoisting motor and pitching motor are critical equipment, and the conditions for testing overspeed switches are not available, it is impossible to confirm whether the overspeed switch protection function is intact and effective during the safety device inspection and testing process, which poses a risk of equipment failure. Summary of the Invention

[0004] The purpose of this invention is to provide an overspeed switch testing device. By adjusting the frequency converter to control the motor speed to reach the overspeed switch limit value, the overspeed switch performance is determined. This effectively implements the inspection and testing requirements of equipment safety protection devices, provides effective technical support for equipment safety protection and equipment fault prevention, ensures the integrity of its protection function, thereby reducing the risk of equipment failure. The testing process is simple to operate, and the testing device is portable and stable, solving the above-mentioned problems existing in the background technology.

[0005] The technical solution of this utility model is: an overspeed switch testing device, comprising a frame, a frequency converter, an alarm device box, a motor, a coupling, and an overspeed switch. The frame comprises upper and lower layers. The motor is installed on the lower layer of the frame, and the frequency converter and the alarm device box are installed on the upper layer of the frame. The overspeed switch is connected and fixed to the output end of the motor via the coupling. The input end of the motor is connected to the frequency converter, and the overspeed switch is connected to the alarm device box.

[0006] The frame also includes a bracket, handles, a frame, and casters. The frame is located on the periphery of the frame, the bracket is fixed to the lower layer of the frame, the overspeed switch is mounted on the bracket, the handles are mounted on the top two sides of the frame, and the casters are mounted on the bottom of the frame.

[0007] There are four types of brackets, the shape and size of which match the model of the overspeed switch.

[0008] The coupling is a spring-loaded, high-torque threaded flexible coupling. There are three types of couplings available to match the model of the overspeed switch.

[0009] The alarm device box is a prefabricated box, and inside the prefabricated box are a 24V switching power supply, a 24V relay and a 24V buzzer, which are connected in sequence.

[0010] The beneficial effects of this utility model are: by adjusting the frequency converter to control the motor speed to reach the overspeed switch limit value, the performance of the overspeed switch is determined, effectively implementing the inspection and testing requirements of the equipment safety protection device, providing effective technical support for equipment safety protection and equipment fault prevention, ensuring that its protection function is intact, thereby reducing the risk of equipment failure, the testing process is simple to operate, and the testing device is portable and stable. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a structural schematic diagram of the framework of this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the bracket of this utility model. Figure 1 ;

[0014] Figure 4 This is a schematic diagram of the structure of the bracket of this utility model. Figure 2 ;

[0015] Figure 5 This is a schematic diagram of the structure of the bracket of this utility model. Figure 3 ;

[0016] Figure 6 This is a schematic diagram of the structure of the bracket of this utility model. Figure 4 ;

[0017] In the diagram: Frame 1, Inverter 2, Alarm device box 3, Motor 4, Coupling 5, Overspeed switch 6, Bracket 7, Handle 8, Frame 9, Casters 10. Detailed Implementation

[0018] To make the purpose, technical solution, and advantages of this utility model clearer, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described implementation cases are only a small part of this utility model, not all of them. All other implementation cases obtained by those skilled in the art based on the implementation cases of this utility model without creative effort are within the protection scope of this utility model.

[0019] An overspeed switch testing device includes a frame 1, a frequency converter 2, an alarm device box 3, a motor 4, a coupling 5, and an overspeed switch 6. The frame 1 has upper and lower layers. The motor 4 is installed on the lower layer of the frame 1, and the frequency converter 2 and the alarm device box 3 are installed on the upper layer of the frame 1. The overspeed switch 6 is connected and fixed to the output end of the motor 4 via the coupling 5. The input end of the motor 4 is connected to the frequency converter 2, and the overspeed switch 6 is connected to the alarm device box 3.

[0020] The frame 1 also includes a bracket 7, a handle 8, a frame 9, and casters 10. The frame 9 is located on the periphery of the frame 1, the bracket 7 is fixed to the lower layer of the frame 1, the overspeed switch 6 is installed on the bracket 7, the handle 8 is installed on the top two sides of the frame 9, and the casters 10 are installed at the bottom of the frame 9.

[0021] There are four types of brackets 7, whose shape and size match the model of the overspeed switch 6.

[0022] The coupling 5 is a spring-loaded high-torque threaded flexible coupling. There are three types of coupling 5, which are matched with the model of the overspeed switch 6.

[0023] The outer shell of the alarm device box 3 is a prefabricated box, and the interior of the prefabricated box contains a 24V switching power supply, a 24V relay and a 24V buzzer, which are connected in sequence. Example

[0024] Motor 4 is a motor with a rated power of 0.37KW and a rated speed of 2800r / min. It can simultaneously meet the overspeed switch limit setting of 1920r / min for the field bridge and 320r / min for the quay bridge, while also meeting the requirements of being lightweight and easy to carry.

[0025] Inverter 2 is a Delta V800-ST001R5G inverter with a rated power of 1.5KW, which can match the motor model. The inverter comes with a control panel, which is easy to operate and can quickly adjust the motor speed to meet the motor speed adjustment requirements of the testing device.

[0026] Frame 1 is a self-made frame made of 2cm square steel. A custom-made frame was created based on the size of the selected motor and frequency converter. The frame has a stable overall structure and includes mounting bases for the motor and frequency converter, facilitating their installation. A handle is located at the top of the frame for easy transport of the entire testing device.

[0027] Coupling 5 is a spring-loaded high-torque threaded flexible coupling with an inner diameter of 10mm-10mm. The spring-loaded high-torque threaded flexible coupling can compensate for radial, axial and angular misalignments, providing higher compatibility and stability for the installation of overspeed switches.

[0028] The alarm device box 3 uses a prefabricated outer shell, and the internal components include a Phoenix 24V switching power supply, an Omron 24V relay, and an Omron 24V buzzer. The internal structure of the device box is simple, the function is stable, and no further maintenance is required after assembly and installation.

[0029] After the utility model is transported to the site, it is placed on a flat surface and fixed. According to the overspeed switch model, a bracket 7 matching the overspeed switch is selected and fixed to the lower layer of frame 1. The overspeed switch 6 is disassembled from the site, placed on the bracket, and connected to motor 4 via coupling 5. After confirming that the overspeed switch 6 is securely fixed, the on-site maintenance power supply supplies power to the frequency converter 2, and the frequency converter 2 is started. The output frequency of the frequency converter 2 is adjusted through the control panel until the motor 4 speed reaches the set limit value of the overspeed switch 6. The overspeed switch 6 is triggered, and the alarm device box 3 alarms, proving that the overspeed switch 6 protection function has been successfully triggered. The output frequency of the frequency converter 2 is reduced, and the motor 4 speed drops below the set limit value of the overspeed switch 6. The alarm device box 3 stops alarming, proving that the overspeed switch 6 has returned to normal. This completes the protection function test of the overspeed switch 6, confirming that the overspeed switch 6 protection function is normal. The output frequency of the frequency converter 2 is set to 0, the motor 4 stops running, the frequency converter power is disconnected, the overspeed switch 6 is removed and reinstalled in its original position on site, and the overspeed switch function test is completed.

[0030] The frame 1 consists of a bracket 7, two handles 8, a frame 9, and four casters 10. The handles and casters are provided to facilitate the handling and dragging of the entire testing device.

[0031] An embodiment of this utility model is as follows:

[0032] The overall dimensions of the testing device are 520×200×390mm (length*width*height), and its weight is 10Kg.

[0033] The frame 1's side panel 9 is made of 20×20×2mm square tubing, made of Q235B material. The bracket 7 is 550×900mm in size, made of 1mm M-shaped steel plate, made of Q235B material. The handle is a rounded handle with a length of 170mm, a hole spacing of 150mm, and a width of 20mm.

[0034] The alarm device box has external dimensions of 200×200×150mm (length*width*height), a detachable top cover, and is made of Q235B steel. The alarm device box consists of an outer shell, a 24V switching power supply, a 24V relay, and a buzzer.

[0035] Depending on the model and size of the overspeed switch, four types of brackets are designed, all made of Q235B steel plate, and fixed to the lower layer of the frame with four M4 bolts.

[0036] This invention determines the performance of the overspeed switch by triggering the set limit value based on the actual rotational speed, effectively fulfilling the inspection and testing requirements of equipment safety protection devices, providing effective technical support for equipment safety protection and equipment fault prevention, and is simple to operate and portable. It can be used to test the protection function of the overspeed switch on-site, effectively solving the drawback that the overspeed switch cannot be tested during the inspection and testing of equipment safety protection devices.

Claims

1. An overspeed switch testing device, characterized in that: The device includes a frame (1), a frequency converter (2), an alarm device box (3), a motor (4), a coupling (5), and an overspeed switch (6). The frame (1) has two layers, with the motor (4) installed on the lower layer and the frequency converter (2) and alarm device box (3) installed on the upper layer. The overspeed switch (6) is connected and fixed to the output end of the motor (4) via the coupling (5). The input end of the motor (4) is connected to the frequency converter (2), and the overspeed switch (6) is connected to the alarm device box (3).

2. The overspeed switch testing device according to claim 1, characterized in that: The frame (1) also includes a bracket (7), a handle (8), a frame (9) and a caster wheel (10). The frame (9) is set on the periphery of the frame (1), the bracket (7) is fixed on the lower layer of the frame (1), the overspeed switch (6) is installed on the bracket (7), the handle (8) is installed on the top two sides of the frame (9), and the caster wheel (10) is installed on the bottom of the frame (9).

3. The overspeed switch testing device according to claim 2, characterized in that: There are four types of brackets (7), whose shape and size match the model of the overspeed switch (6).

4. The overspeed switch testing device according to claim 1, characterized in that: The coupling (5) is a spring high torque threaded flexible coupling. There are three types of couplings (5) that match the model of the overspeed switch (6).

5. The overspeed switch testing device according to claim 1, characterized in that: The outer shell of the alarm device box (3) is a prefabricated box. Inside the prefabricated box are a 24V switching power supply, a 24V relay and a 24V buzzer, which are connected in sequence.

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