A power frequency withstand voltage test device with automatic voltage adjustment function

Abstract

This utility model provides a power frequency withstand voltage test device with automatic voltage adjustment function, relating to the field of power equipment testing technology. It includes: a base; a fixed frame fixed to the upper end of the base, a toothed plate mounted on the fixed frame, a movable frame that can move up and down mounted on the fixed frame, and a contact wheel mounted on the movable frame, the contact wheel contacting the fixed frame; in this utility model, the fixed frame and the movable frame form a transmission structure through the toothed plate, worm gear, and motor, allowing for electric adjustment of the movable frame's height, thus changing the height of the top base and test platform to accommodate objects of different heights and improve operational comfort. The test platform integrates a boost / buck button and a display screen, enabling intuitive voltage adjustment and real-time parameter display. An electric voltage regulator and a high-voltage test transformer are installed inside the test platform. The electric voltage regulator adjusts the input voltage, which is then boosted by the transformer to output a stable high-voltage test voltage, achieving automatic voltage adjustment to ensure accurate and controllable voltage, meeting the voltage parameter requirements of different tests.

Description

Technical Field

[0001] This utility model relates to the field of power equipment testing technology, and in particular to a power frequency withstand voltage test device with automatic voltage regulation function. Background Technology

[0002] Power frequency withstand voltage test is an important test item for motor (transformer) manufacturers and users to inspect the insulation performance of motor components (semi-finished products) and finished motors. The quality of this performance directly affects the reliability of the motor and personal safety. Therefore, a power frequency withstand voltage test device with automatic voltage adjustment function is designed.

[0003] Existing power frequency withstand voltage testing equipment is difficult to adapt quickly to the testing requirements of objects of different heights. When the height of the object being tested changes, the operator needs to frequently adjust the position of the equipment or add additional shims, resulting in poor operating comfort and even affecting the test accuracy due to height matching errors. Utility Model Content

[0004] This disclosure relates to a power frequency withstand voltage test device with automatic voltage adjustment function, in order to solve the technical problems mentioned in the background art.

[0005] In a first aspect, this disclosure provides a power frequency withstand voltage test device with automatic voltage adjustment function, specifically comprising: a base; a movable wheel installed at the lower end of the base, a fixed frame fixed at the upper end of the base, a toothed plate installed on the fixed frame, a movable frame that can move up and down installed on the fixed frame, a contact wheel installed on the movable frame, the contact wheel contacting the fixed frame, a transmission box installed on the movable frame, a worm gear installed inside the transmission box, a gear fixed on the rotating shaft of the worm gear, the gear meshing with the toothed plate, and a worm installed inside the transmission box, the worm meshing with the worm gear, a first motor installed on the transmission box, the output shaft of the first motor connected to the worm, and support legs installed on the movable frame, four support legs being provided, with top seats installed at the upper ends of the four support legs.

[0006] In at least some embodiments, a test stand is mounted on the top seat, the test stand is provided with buttons for increasing and decreasing voltage, and a display screen is provided on the test stand.

[0007] In at least some embodiments, a support is installed on the top seat, two rails are installed on the support, and movable seats that can move up and down are installed on the two rails.

[0008] In at least some embodiments, the movable seat is provided with a threaded hole, and a lead screw is installed on the support, the lead screw being threadedly engaged with the threaded hole on the movable seat.

[0009] In at least some embodiments, a clamping seat is installed at the upper end of the support, a locking bolt is threaded onto the clamping seat, the clamping seat is clamped onto the lead screw, a handwheel is installed at the upper end of the lead screw, and a guard plate is installed at the front end of the support.

[0010] In at least some embodiments, a first arm is mounted on the movable seat, a rotatable second arm is mounted on the first arm, and a rotatable connecting seat is mounted on the second arm.

[0011] In at least some embodiments, the connector is equipped with four connecting plates, each with a waist-shaped groove, and a data monitor is mounted on the four connecting plates.

[0012] In at least some embodiments, the test bench is equipped with an electric voltage regulator and a high-voltage test transformer. The input terminal of the electric voltage regulator is connected to a power supply, and the output terminal is connected to the primary coil of the high-voltage test transformer. The secondary coil of the high-voltage test transformer is connected to the high-voltage output terminal.

[0013] This utility model provides a power frequency withstand voltage test device with automatic voltage adjustment function, which has the following beneficial effects:

[0014] In this invention, the fixed frame and the movable frame are connected by a toothed plate, a worm gear and a motor to form a transmission structure, which enables the movable frame to be adjusted up and down, thereby driving the height of the top seat and the test platform to change, meeting the testing needs of objects of different heights and improving the comfort of operation.

[0015] Furthermore, in this invention, the test stand integrates boost / buck buttons and a display screen, supporting intuitive voltage adjustment and real-time data display. Operators can accurately control the test voltage and monitor parameters. The data monitor is installed via a rotatable support arm and connecting plate, and its position and angle can be flexibly adjusted to facilitate observation of test data from multiple angles, thereby improving the visualization of the testing process.

[0016] Furthermore, in this invention, the test bench is equipped with an electric voltage regulator and a high-voltage test transformer. The input voltage is adjusted by the electric voltage regulator, and after being stepped up by the transformer, a stable test high voltage is output, realizing the automatic voltage regulation function, ensuring the accuracy and controllability of the voltage output, and meeting the strict requirements of different tests on voltage parameters. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0019] In the attached diagram:

[0020] Figure 1 A schematic diagram of the overall structure of this application is shown.

[0021] Figure 2 A structural schematic diagram of the fixing frame portion of this application is shown.

[0022] Figure 3 This application shows Figure 2 A magnified structural diagram of part A in the middle.

[0023] Figure 4 A structural schematic diagram of the support portion of this application is shown.

[0024] Figure 5 A schematic diagram of the structure of the movable seat portion of this application is shown.

[0025] Figure 6 This application shows Figure 5 A magnified structural diagram of part B.

[0026] Figure 7 A schematic diagram of the structure of the first arm portion of this application is shown.

[0027] List of reference numerals

[0028] 1. Base; 11. Casters; 2. Fixed frame; 21. Toothed plate; 22. Movable frame; 221. Contact wheel; 222. Transmission box; 223. Motor No. 1; 23. Support leg; 3. Top seat; 31. Test bench; 311. Display screen; 312. Button; 32. Support; 321. Rail; 322. Movable seat; 323. Lead screw; 3231. Handwheel; 3232. Clamping seat; 3233. Locking bolt; 324. Guard plate; 33. First support arm; 331. Second support arm; 332. Connecting seat; 333. Connecting plate; 34. Data monitor. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] Please refer to Figures 1 to 7 Example 1:

[0031] This utility model proposes a power frequency withstand voltage test device with automatic voltage adjustment function, comprising: a base 1; a movable wheel 11 is installed at the lower end of the base 1, a fixed frame 2 is fixed at the upper end of the base 1, a toothed plate 21 is installed on the fixed frame 2, a movable frame 22 that can move up and down is installed on the fixed frame 2, a contact wheel 221 is installed on the movable frame 22, the contact wheel 221 contacts the fixed frame 2, a transmission box 222 is installed on the movable frame 22, a worm gear is installed inside the transmission box 222, a gear is fixed on the rotating shaft of the worm gear, the gear meshes with the toothed plate 21, and a worm is installed inside the transmission box 222, the worm meshes with the worm gear, a first motor 223 is installed on the transmission box 222, the output shaft of the first motor 223 is connected to the worm, and four support legs 23 are installed on the movable frame 22, with a top seat 3 installed at the upper end of the four support legs 23.

[0032] In this embodiment, a test bench 31 is installed on the top base 3. The test bench 31 is equipped with buttons 312 for increasing and decreasing voltage, and a display screen 311 is also installed on the test bench 31. Its function is as follows: when the increase button 312 is pressed, the electric voltage regulator inside the device (located inside the test bench 31) will automatically adjust the input voltage so that the output voltage of the secondary coil of the high voltage test transformer increases to the rated test value at a set rate, and the withstand voltage test is started. When the decrease button 312 is pressed, the electric voltage regulator will control the voltage to decrease to zero at the same rate to ensure safe power disconnection after the test, or the voltage can be manually adjusted as needed during the test. The display screen 311 is installed on the test bench 31 to display key test parameters in real time.

[0033] In this embodiment, a support 32 is mounted on the top seat 3, and two rails 321 are mounted on the support 32. A movable seat 322, which can move up and down, is mounted on the two rails 321. The movable seat 322 has a threaded hole, and a lead screw 323 is mounted on the support 32. The lead screw 323 is threadedly engaged with the threaded hole on the movable seat 322. A clamping seat 3232 is mounted on the upper end of the support 32, and a locking bolt 3233 is threaded onto the clamping seat 3232. The clamping seat 3232 clamps onto the lead screw 323, and a handwheel 3 is mounted on the upper end of the lead screw 323. 231. A guard plate 324 is installed at the front end of the support 32. Its function is: the operator turns the handwheel 3231 to drive the lead screw 323 to rotate, so that the movable seat 322 can be precisely raised and lowered along the rail 321 to adjust the height. After adjusting to the target position, the locking bolt 3233 on the clamping seat 3232 is tightened. The clamping seat 3232 will generate a clamping force on the lead screw 323, thereby locking the rotation state of the lead screw 323. This effectively prevents the lead screw 323 from rotating on its own due to external vibration or operational errors, and ensures that the movable seat 322 remains stable after being adjusted to the target height.

[0034] In Example 2, based on Example 1, a first support arm 33 is installed on the movable base 322, a rotatable second support arm 331 is installed on the first support arm 33, a rotatable connecting base 332 is installed on the second support arm 331, four connecting plates 333 are installed on the connecting base 332, and waist-shaped grooves are provided on the connecting plates 333. Data monitors 34 are installed on the four connecting plates 333. The function of these components is that the arrangement of the first support arm 33, the second support arm 331, and the connecting base 332 allows the data monitor 34 to flexibly adapt to the observation needs of different angles, ensuring that operators can clearly view key parameters such as voltage, current, and time from any position during the experiment, thereby improving the convenience and accuracy of data monitoring.

[0035] In Example 3, based on Examples 1 and 2, an electric voltage regulator and a high-voltage test transformer are installed inside the test bench 31. The input terminal of the electric voltage regulator is connected to the power supply, and the output terminal is connected to the primary coil of the high-voltage test transformer. The secondary coil of the high-voltage test transformer is connected to the high-voltage output terminal. Its function is as follows: the input terminal of the electric voltage regulator is connected to a 220V power supply, and the output voltage can be adjusted through an internal voltage regulation mechanism. Its output terminal is connected to the primary coil of the high-voltage test transformer. When the output voltage of the electric voltage regulator changes, the input voltage of the primary coil of the high-voltage test transformer changes accordingly. Based on the principle of electromagnetic induction, the secondary coil induces a high voltage of 0-30kV according to the transformation ratio, and connects to the motor under test through the high voltage output terminal to realize the voltage boosting process of the test voltage. At the end of the test, the electric voltage regulator reduces the voltage at a set rate, so that the secondary output voltage of the high voltage test transformer drops to zero. This system ensures that the output voltage can be accurately adjusted to the rated test value through the automatic voltage regulation of the electric voltage regulator and the voltage boosting of the transformer, meeting the strict requirements of the power frequency withstand voltage test for voltage parameters, while ensuring the stability and controllability of the voltage rise and fall process, and providing a reliable high voltage power supply for motor insulation performance testing.

[0036] The working principle of this embodiment is as follows: The movable wheel 11 at the lower end of the base 1 facilitates the movement of the device. The toothed plate 21 is installed on the fixed frame 2 at the upper end of the base 1. The movable frame 22 contacts the fixed frame 2 through the contact wheel 221. Inside the transmission box 222 on the movable frame 22, the output shaft of the first motor 223 is connected to the worm gear. The worm gear meshes with the worm wheel. The gear on the rotating shaft of the worm wheel meshes with the toothed plate 21. When the first motor 223 drives the worm gear to rotate, it drives the gear to move up and down along the toothed plate 21 through the worm wheel, thereby causing the movable frame 22 to move up and down. The four support legs 23 on the movable frame 22 support the top seat 3. The measuring rods on the top seat 3... Test bench 31 is equipped with a display screen 311 and buttons 312 for voltage increase and decrease. When the voltage increase button 312 is pressed, the electric voltage regulator inside the test bench 31 automatically adjusts the input voltage, causing the secondary coil of the high-voltage test transformer to rise to the rated test value at a set rate to start the withstand voltage test. When the voltage decrease button 312 is pressed, the electric voltage regulator controls the voltage to drop to zero at the same rate. The display screen 311 displays the key test parameters in real time. Two rail rods 321 are installed on the support 32 on the top seat 3. The movable seat 322 is installed on the rail rods 321 through a threaded hole and a lead screw 323. The operator turns the handwheel 3... 231 drives the lead screw 323 to rotate, causing the movable seat 322 to precisely rise and fall along the rail 321. After adjusting to the target position, the locking bolt 3233 on the clamping seat 3232 is tightened. The clamping seat 3232 generates a clamping force on the lead screw 323 to lock its rotation state. The guard plate 324 at the front end of the support 32 provides protection. The first support arm 33, the rotatable second arm 331, and the rotatable connecting seat 332 on the movable seat 322 allow the data monitor 34 to flexibly adapt to different angle observation needs after being installed through four connecting plates 333 with waist-shaped grooves. The electric adjustment in the test bench 31 The input terminal of the voltage regulator is connected to a 220V power supply, and the output terminal is connected to the primary coil of the high-voltage test transformer. The secondary coil of the high-voltage test transformer is connected to the high-voltage output terminal. When the electric voltage regulator adjusts the output voltage, the input voltage of the primary coil of the high-voltage test transformer changes. Based on the principle of electromagnetic induction, the secondary coil induces a high voltage of 0-30kV according to the transformation ratio and connects to the motor under test through the high-voltage output terminal to realize the voltage increase process of the test voltage. At the end of the test, the electric voltage regulator reduces the voltage at the set rate, so that the secondary output voltage of the high-voltage test transformer drops to zero, thereby meeting the voltage parameter requirements of the power frequency withstand voltage test.

[0037] The following points should be noted in this article:

[0038] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0039] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0040] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A power frequency withstand voltage test device with automatic voltage adjustment function, comprising: The base (1) is characterized in that a movable wheel (11) is installed at the lower end of the base (1), a fixed frame (2) is fixed at the upper end of the base (1), a toothed plate (21) is installed on the fixed frame (2), a movable frame (22) that can move up and down is installed on the fixed frame (2), a contact wheel (221) is installed on the movable frame (22), the contact wheel (221) contacts the fixed frame (2), a transmission box (222) is installed on the movable frame (22), a worm gear is installed inside the transmission box (222), a gear is fixed on the rotating shaft of the worm gear, the gear meshes with the toothed plate (21), and a worm is installed inside the transmission box (222), the worm meshes with the worm gear, a first motor (223) is installed on the transmission box (222), the output shaft of the first motor (223) is connected to the worm, a support leg (23) is installed on the movable frame (22), four support legs (23) are provided, and a top seat (3) is installed on the upper end of the four support legs (23).

2. The power frequency withstand voltage test device with automatic voltage adjustment function according to claim 1, characterized in that, A test stand (31) is installed on the top seat (3), and the test stand (31) is provided with buttons (312) for increasing and decreasing voltage, and a display screen (311) is provided on the test stand (31).

3. The power frequency withstand voltage test device with automatic voltage adjustment function according to claim 2, characterized in that, A support (32) is installed on the top seat (3), and two rails (321) are installed on the support (32). A movable seat (322) that can move up and down is installed on the two rails (321).

4. The power frequency withstand voltage test device with automatic voltage adjustment function according to claim 3, characterized in that, The movable seat (322) is provided with a threaded hole, and a lead screw (323) is installed on the support (32), and the lead screw (323) is threadedly engaged with the threaded hole on the movable seat (322).

5. A power frequency withstand voltage test device with automatic voltage adjustment function according to claim 4, characterized in that, The upper end of the support (32) is equipped with a clamping seat (3232), and a locking bolt (3233) is threaded onto the clamping seat (3232). The clamping seat (3232) is clamped onto the lead screw (323). A handwheel (3231) is installed on the upper end of the lead screw (323), and a guard plate (324) is installed on the front end of the support (32).

6. The power frequency withstand voltage test device with automatic voltage adjustment function according to claim 4, characterized in that, The movable seat (322) is equipped with a first arm (33), the first arm (33) is equipped with a rotatable second arm (331), and the second arm (331) is equipped with a rotatable connecting seat (332).

7. A power frequency withstand voltage test device with automatic voltage adjustment function according to claim 6, characterized in that, The connector (332) is equipped with four connecting plates (333), each with a waist-shaped groove, and a data monitor (34) is installed on the four connecting plates (333).

8. A power frequency withstand voltage test device with automatic voltage adjustment function according to claim 2, characterized in that, The test bench (31) is equipped with an electric voltage regulator and a high-voltage test transformer. The input end of the electric voltage regulator is connected to the power supply, and the output end is connected to the primary coil of the high-voltage test transformer. The secondary coil of the high-voltage test transformer is connected to the high-voltage output terminal.

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