A test fixture for a transformer tester

Abstract

The utility model relates to a test fixture for mutual inductor tester, including operation frame, clamping piece, conveying mechanism, the operation frame is equipped with the clamping frame, places mutual inductor tester on the conveyer belt on the top of frame body, cylinder contracts contact plate to descend at this moment, does not support the frame body, under the gravity pressure of mutual inductor tester, frame body descends, drives both sides transmission rod to swing, two mobile racks are close to each other, two clamps mutual inductor tester two -way clamping, facilitate subsequent test operation, and can hold different size mutual inductor tester, after detection is completed, start cylinder contact plate and ascend, frame body ascends, pushes out mutual inductor tester, two clamps are far from each other, start drive and drive rotating rod rotation, realize conveyer belt rotation, push mutual inductor tester to the roll body on the top of transfer plate, owing to the inclination of transfer plate and set up, realize mutual inductor tester blanking.

Description

Technical Field

[0001] This utility model relates to the technical field of current transformer testers, specifically a test fixture for current transformer testers. Background Technology

[0002] As a key device for calibrating the accuracy of current transformers in power systems, current transformer testers must undergo rigorous batch testing before leaving the factory to ensure measurement accuracy. Most test fixtures only have the function of fixing the current transformer tester. After the test is completed, the instrument must be manually removed from the fixture and moved to the next work station.

[0003] For example, the authorized patent document with application number CN202221832971.9 discloses an impedance tester for transformer production testing with clamping function, including a housing and a protective device. The upper end of the housing has a vertically downward first chamber with an inner groove on its inner wall. The upper end of the housing has a vertically downward second chamber. The protective device is movably connected inside the first chamber. The inner wall of the second chamber has a vertically downward through groove. A telescopic motor is installed at the bottom of the second chamber. A connecting rod that cooperates with the protective device is provided inside the through groove. The impedance tester body is housed inside the first chamber, preventing the impedance tester body from being exposed during the testing process. The impedance tester body is limited and fixed inside the first chamber by a fixed flexible plate, increasing the protection performance of the impedance tester body inside the first chamber. The impedance tester body also has a clamping function.

[0004] The aforementioned patents require manual unloading of the instrument after testing, making automated unloading impossible. Therefore, we need to provide a test fixture for current transformer testers. Utility Model Content

[0005] The purpose of this utility model is to provide a test fixture for a current transformer tester. The fixture is equipped with a conveying mechanism that enables automated unloading of the current transformer tester. The conveying mechanism can be seamlessly connected with the testing process. The unloading action is started immediately after the test is completed, which greatly shortens the product turnaround time. It is especially suitable for batch testing scenarios, and can continuously and efficiently process workpieces, improve overall production capacity, and solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a test fixture for a current transformer tester, comprising:

[0007] The instrument includes an operating frame, a clamping component, and a conveying mechanism. The operating frame is equipped with a clamping frame for bidirectional clamping and fixing of the instrument transformer tester to be tested. The operating frame is also equipped with a conveying mechanism for unloading the instrument transformer tester.

[0008] The conveying mechanism includes a conveyor, a transfer plate, and rollers. The conveyor is located in the groove inside the operating frame to enable the placement and movement of the current transformer tester. Multiple rollers are rotatably mounted on the transfer plate, which is rotatably mounted inside the operating frame. The end of the transfer plate is close to the conveyor for guiding and conveying the current transformer tester.

[0009] Preferably, the conveyor includes a frame, rotating rods, a conveyor belt, and a driver. The frame is located in the groove inside the operating frame. Three rotating rods are rotatably mounted inside the frame. The conveyor belt is connected to the surface of the three rotating rods. A driver for rotating the rotating rods is provided on one side of the frame. The output shaft of the driver is fixedly connected to the end of any rotating rod.

[0010] Preferably, the three rotating rods are arranged in a triangular shape within the frame, with two rotating rods located at the top and horizontally distributed, so that the top of the conveyor belt forms a horizontal conveying plane.

[0011] Preferably, it also includes a brush component for cleaning the outer surface of the conveyor belt. The brush component includes a spring, a plate and a brush part. The plate is slidably installed in the frame, and two springs are provided between the plate and the inner wall of the frame. The brush part that fits against the bottom of the conveyor belt is installed on the top of the plate.

[0012] Preferably, the brush part is a soft brush, and the top of the brush part is set as an inclined surface that fits against the bottom of the conveyor belt. A guide rod is movably sleeved inside the spring. The surface of the guide rod is slidably installed inside the frame, and the upper end of the guide rod is fixed to the bottom of the plate.

[0013] Preferably, the clamping component includes a guide groove, a movable frame, a clamping plate, and a transmission rod. The transmission rods are hinged to both sides of the frame, and the movable frames are hinged to the top of the two transmission rods. A clamping plate is provided on the adjacent side of the two movable frames, and the clamping plate is fixed to the top of the movable frame. A guide groove for guiding the sliding of the movable frame is provided in the operating frame.

[0014] Preferably, the operating frame is provided with a driving component for lifting the frame. The driving component includes a cylinder and a contact plate. The cylinder is embedded in the operating frame, and the contact plate is fixedly installed on the top of the cylinder. When the piston rod of the cylinder rises, it pushes the frame to move upward, thereby triggering the release action of the clamping component.

[0015] Preferably, two diagonal braces are fixedly installed between the bottom of the transfer plate and the operating frame, and the transfer plate is inclined.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model features a conveying mechanism that enables automated feeding of current transformer testers. The conveying mechanism can be seamlessly integrated with the testing process, and the feeding action can be started immediately after the test is completed, which greatly shortens the product turnaround time. It is especially suitable for batch testing scenarios, and can continuously and efficiently process workpieces, thereby improving overall production capacity. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a three-dimensional bottom view of the structure of this utility model;

[0020] Figure 3 This is a cross-sectional view of the clamping component of this utility model;

[0021] Figure 4 This is a three-dimensional view of the brush component of this utility model.

[0022] In the diagram: 1. Operating frame; 2. Clamping component; 21. Guide groove; 22. Moving frame; 23. Clamping plate; 24. Transmission rod; 3. Conveying mechanism; 31. Conveyor; 311. Frame; 312. Rotating rod; 313. Conveyor belt; 314. Driver; 32. Transfer plate; 33. Roller; 4. Brush component; 41. Spring; 42. Plate; 43. Brush part; 5. Guide rod; 6. Driving component; 61. Cylinder; 62. Contact plate; 7. Diagonal brace. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a test fixture for a current transformer tester, comprising:

[0025] The operating frame 1, clamping component 2, and conveying mechanism 3 are provided. The operating frame 1 is equipped with a clamping component for bidirectional clamping and fixing of the current transformer tester to be tested. The operating frame 1 is equipped with a conveying mechanism 3 for unloading the current transformer tester.

[0026] The conveying mechanism 3 includes a conveyor 31, a transfer plate 32, and rollers 33. The conveyor 31 is located in the groove of the operating frame 1 to realize the placement and movement of the current transformer tester. Multiple rollers 33 can be rotatably mounted on the transfer plate 32, and the transfer plate 32 is rotatably mounted in the operating frame 1. The end of the transfer plate 32 is close to the conveyor 31 for guiding and conveying the current transformer tester.

[0027] Specifically, the clamping component 2 is installed inside the operating frame 1 to clamp and fix the current transformer tester in both directions, adapting to current transformer testers of different sizes. The conveying mechanism 3 is set to automatically unload the current transformer tester. The conveyor 31 is installed in the groove inside the operating frame 1, and a transfer plate 32 with multiple rollers 33 is set in the discharge direction of the conveyor 31 to assist in guiding the movement of the current transformer tester.

[0028] The conveyor mechanism 3 enables automated feeding of the current transformer tester. The conveyor mechanism 3 can be seamlessly connected with the testing process. The feeding action is started immediately after the test is completed, which greatly shortens the product turnaround time. It is especially suitable for batch testing scenarios, and can continuously and efficiently process workpieces, thereby improving the overall production capacity.

[0029] The conveyor 31 includes a frame 311, rotating rods 312, a conveyor belt 313, and a driver 314. The frame 311 is located in the groove of the operating frame 1. Three rotating rods 312 are rotatably installed inside the frame 311. The conveyor belt 313 is connected to the surface of the three rotating rods 312. A driver 314 for rotating the rotating rods 312 is provided on one side of the frame 311. The output shaft of the driver 314 is fixedly connected to the end of any rotating rod 312.

[0030] Furthermore, all three rotating rods 312 are rotatably mounted inside the frame 311, and the conveyor belt 313 is mounted on the surface of the three rotating rods 312. The frame 311 has a driver 314 on one side to rotate the rotating rods 312. The output shaft of the driver 314 is fixedly connected to the end of any rotating rod 312. The surfaces of the three rotating rods 312 are covered with a rubber layer to increase friction. The conveyor belt 313 is a rubber layer belt with high friction between them. The rotation of the rotating rods 312 can realize the rotation of the conveyor belt 313. The driver 314 is a 750W AC servo motor, which is directly connected to the active rotating rod 312 through a flexible coupling. The conveyor belt 313 runs at a slow speed to ensure the smooth movement of the current transformer tester.

[0031] Three rotating rods 312 are arranged in a triangular shape inside the frame 311, with two of the rotating rods 312 located at the top and horizontally distributed, so that the top of the conveyor belt 313 forms a horizontal conveying plane;

[0032] It is worth noting that two rotating rods 312 are located at the top and are horizontally distributed to support the placement of the current transformer tester. Two auxiliary rods are provided inside the frame 311 to provide auxiliary support for the current transformer tester. The surfaces of the two auxiliary rods are in contact with the inner wall of the conveyor belt 313. The horizontal distribution of the two upper rotating rods 312 forms a stable support plane, ensuring that the center of gravity of the instrument is always within the support area. The auxiliary rods are in contact with the inner wall of the conveyor belt 313 to provide auxiliary support.

[0033] It also includes a brush 4 for cleaning the outer surface of the conveyor belt 313. The brush 4 includes a spring 41, a plate 42 and a brush part 43. The plate 42 is slidably installed inside the frame 311, and two springs 41 are provided between the plate 42 and the inner wall of the frame 311. The brush part 43 that fits against the bottom of the conveyor belt 313 is installed on the top of the plate 42.

[0034] It should be noted that as the conveyor belt 313 rotates continuously, the brush part 43 comes into contact with the outer surface of the conveyor belt 313 to clean the surface debris and prevent debris from adhering to the conveyor belt 313.

[0035] The brush part 43 is a soft brush, and the top of the brush part 43 is set as an inclined surface that fits against the bottom of the conveyor belt 313. A guide rod 5 is movably sleeved inside the spring 41. The surface of the guide rod 5 is slidably installed inside the frame 311, and the upper end of the guide rod 5 is fixed to the bottom of the plate 42.

[0036] The spring 41 provides constant pressure, which enables the brush part 43 to effectively remove debris while avoiding scratching the surface. The stroke of the spring 41 can automatically compensate for brush wear.

[0037] The clamping component 2 includes a guide groove 21, a movable frame 22, a clamping plate 23, and a transmission rod 24. The frame 311 is hinged to both sides of the transmission rod 24, and the top of the two transmission rods 24 is hinged to the movable frame 22. The two movable frames 22 are provided with clamping plates 23 on adjacent sides. The clamping plates 23 are fixed to the top of the movable frame 22. The operating frame 1 is provided with a guide groove 21 for guiding the sliding of the movable frame 22.

[0038] Specifically, when the frame 311 is subjected to the gravity of the current transformer tester, the frame 311 moves downward (at this time, the top contact plate 62 of the cylinder 61 does not contact the bottom of the frame 311), causing the transmission rods 24 on both sides to swing, bringing the two moving frames 22 closer to each other, and the two clamping plates 23 clamp the current transformer tester in both directions, which facilitates subsequent testing operations and can clamp current transformer testers of different sizes. After the test is completed, the cylinder 61 is activated to move the contact plate 62 upward, the frame 311 moves upward, pushes out the current transformer tester, and the two clamping plates 23 move away from each other.

[0039] The operating frame 1 is equipped with a driving component 6 for lifting the frame 311. The driving component 6 includes a cylinder 61 and a contact plate 62. The cylinder 61 is embedded in the operating frame 1, and the contact plate 62 is fixedly installed on the top of the cylinder 61. When the piston rod of the cylinder 61 rises, it pushes the frame 311 to move upward, thereby triggering the release action of the clamping component 2.

[0040] It is worth noting that when the cylinder 61 drives the contact plate 62 to a high point, it can lift the frame 311 out, which is convenient for placing the current transformer tester. When the contact plate 62 is at a low point, it does not contact the frame 311, and the current transformer tester can be fixed and clamped by its own weight.

[0041] To provide auxiliary support for the transfer plate 32, the lower ends of the two diagonal braces 7 are on the operating frame 1, and the upper ends are located at the bottom of the transfer plate 32, supporting the transfer plate 32. The transfer plate 32 is slightly tilted so that the current transformer tester can slide down smoothly without excessive downward impact. A buffer plate is provided at the discharge port of the transfer plate 32 to receive the current transformer tester and provide buffer protection. Two diagonal braces 7 are fixedly installed between the bottom of the transfer plate 32 and the operating frame 1, and the transfer plate 32 is tilted.

[0042] The driver 314 (model 42HS hybrid stepper motor) and cylinder 61 (model TKCSDL-4032A thin cylinder 61) involved in this application are both implemented using existing mature technologies and connected to an external controller and power supply. This is a conventional technical means in the field, so their specific circuit connections, control logic and working process will not be described in detail.

[0043] This device places the current transformer tester on the conveyor belt 313 at the top of the frame 311. At this time, the cylinder 61 retracts and the contact plate 62 moves downward without supporting the frame 311. Under the pressure of the gravity of the current transformer tester, the frame 311 moves downward, causing the transmission rods 24 on both sides to swing, bringing the two moving frames 22 closer together. The two clamping plates 23 clamp the current transformer tester in both directions, which facilitates subsequent testing operations and can clamp current transformer testers of different sizes. After the test is completed, the cylinder 61 is activated to move the contact plate 62 upward, the frame 311 moves upward, and pushes out the current transformer tester. The two clamping plates 23 move away from each other, and the driver 314 is activated to drive the rotating rod 312 to rotate, realizing the rotation of the conveyor belt 313, pushing the current transformer tester onto the roller 33 at the top of the transfer plate 32. Due to the inclined setting of the transfer plate 32, the current transformer tester is unloaded.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test fixture for a current transformer tester, characterized in that, include: The operating frame (1), clamping component (2), and conveying mechanism (3) are provided. The operating frame (1) is equipped with a clamping component for bidirectional clamping and fixing of the current transformer tester to be tested. The operating frame (1) is equipped with a conveying mechanism (3) for unloading the current transformer tester. The conveying mechanism (3) includes a conveyor (31), a transfer plate (32) and rollers (33). The conveyor (31) is located in the groove of the operating frame (1) to realize the placement and movement of the current transformer tester. Multiple rollers (33) can be rotatably installed on the transfer plate (32), and the transfer plate (32) is rotatably installed in the operating frame (1). The end of the transfer plate (32) is close to the conveyor (31) for guiding and conveying the current transformer tester.

2. The test fixture for a current transformer tester according to claim 1, characterized in that: The conveyor (31) includes a frame (311), rotating rods (312), a conveyor belt (313), and a driver (314). The frame (311) is located in the groove of the operating frame (1). Three rotating rods (312) are rotatably installed inside the frame (311). The surface of the three rotating rods (312) is connected to the conveyor belt (313). A driver (314) for rotating the rotating rods (312) is provided on one side of the frame (311). The output shaft of the driver (314) is fixedly connected to the end of any rotating rod (312).

3. A test fixture for a current transformer tester according to claim 2, characterized in that: The three rotating rods (312) are arranged in a triangular shape inside the frame (311), with two of the rotating rods (312) located at the top and horizontally distributed, so that the top of the conveyor belt (313) forms a horizontal conveying plane.

4. A test fixture for a current transformer tester according to claim 3, characterized in that: It also includes a brush (4) for cleaning the outer surface of the conveyor belt (313), the brush (4) including a spring (41), a plate (42) and a brush part (43), the plate (42) is slidably installed inside the frame (311), and two springs (41) are provided between the plate (42) and the inner wall of the frame (311), and the brush part (43) that fits against the bottom of the conveyor belt (313) is installed on the top of the plate (42).

5. A test fixture for a current transformer tester according to claim 4, characterized in that: The brush part (43) is a soft brush, and the top of the brush part (43) is set as an inclined surface that fits against the bottom of the conveyor belt (313). A guide rod (5) is movably sleeved inside the spring (41). The surface of the guide rod (5) is slidably installed inside the frame (311), and the upper end of the guide rod (5) is fixed to the bottom of the plate (42).

6. A test fixture for a current transformer tester according to claim 2, characterized in that: The clamping component (2) includes a guide groove (21), a movable frame (22), a clamping plate (23), and a transmission rod (24). The frame (311) is hinged to both sides of the transmission rod (24), and the top of the two transmission rods (24) is hinged to the movable frame (22). The two movable frames (22) are provided with clamping plates (23) on adjacent sides. The clamping plates (23) are fixed to the top of the movable frame (22). The operating frame (1) is provided with a guide groove (21) for guiding the sliding of the movable frame (22).

7. A test fixture for a current transformer tester according to claim 6, characterized in that: The operating frame (1) is provided with a drive component (6) for lifting the frame (311). The drive component (6) includes a cylinder (61) and a contact plate (62). The cylinder (61) is embedded in the operating frame (1). The contact plate (62) is fixedly installed on the top of the cylinder (61). When the piston rod of the cylinder (61) rises, it pushes the frame (311) to move upward, thereby triggering the release action of the clamping component (2).

8. A test fixture for a current transformer tester according to claim 1, characterized in that: Two diagonal braces (7) are fixedly installed between the bottom of the transfer plate (32) and the operating frame (1), and the transfer plate (32) is set at an angle.

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