A detection jig for a core of a saturable reactor

Abstract

The utility model belongs to electrical equipment detection technical field discloses a detection clamp for the iron core of saturable reactor, including limit axle, limit axle passes through first baffle and is fixed in the bottom plate one end, and is connected with first baffle rotation, the other end of bottom plate sets up worm and worm gear motor, and the push -pull link of worm and worm gear motor is fixedly connected with second baffle in the end close to first baffle, and the power input end of worm and worm gear motor is connected to power supply through two -way switch, and the bottom plate between first baffle and second baffle is provided with two coils that are adapted to the iron core to be measured;When working, rotate and open first baffle, and drive second baffle away from first baffle through two -way switch control motor, then put in the iron core to be measured, then reset first baffle and second baffle clamp and detect the iron core;The utility model clamps fast and reliably, and the force is consistent, and is applicable to batch detection saturable reactor iron core.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment testing technology, specifically relating to a testing fixture for the iron core of a saturated reactor. Background Technology

[0002] A saturated reactor is an important power electronic device, mainly composed of an iron core, coil windings, and insulating materials. Its iron core is usually made of laminated silicon steel sheets with high magnetic permeability and designed with a C-shaped structure that is separated into two halves to reduce eddy current losses and facilitate installation with the coil.

[0003] During the manufacturing and quality inspection of reactors, it is necessary to accurately measure their core losses. During measurement, the mating surfaces of the two C-shaped core halves must be tightly and firmly bonded together to form a complete closed magnetic circuit. If the core is not clamped securely, gaps exist, or there is slight vibration, it will cause an increase in the magnetic reluctance of the magnetic circuit, resulting in a significant deviation in the measured loss value, which will fail to reflect the true performance of the core.

[0004] Currently, most common clamping methods involve manual operation, such as using a screw and steel strip to tighten the iron core. This method has the following disadvantages: Low efficiency: Each loading and unloading requires manually tightening screws, which is cumbersome and time-consuming, and cannot meet the needs of rapid batch testing on the production line.

[0005] Inconsistent clamping force: Different operators apply different torques, resulting in differences in clamping conditions for each test, affecting the consistency and comparability of test results. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a testing fixture for the iron core of saturated reactors. The fixture uses a first baffle that can be rotated and switched in position and a second baffle driven by a worm gear motor to cooperate with each other to quickly put and take the iron core to be tested. The iron core to be tested is quickly positioned by a positioning block. The clamping is fast, reliable and consistent, and it is suitable for batch testing of iron cores for saturated reactors.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A testing fixture for the core of a saturated reactor includes a base plate 9 and a limiting shaft 1. A first baffle 11 is disposed at one end of the base plate 9. The limiting shaft 1 passes through a pre-reserved through hole on the first baffle 11 and is fixed to one end side wall of the base plate 9. The limiting shaft 1 is rotatably connected to the first baffle 11. A worm gear motor 5 is installed at the other end of the base plate 9. The push-pull rod 8 of the worm gear motor 5 is perpendicular to the first baffle 11 and a second baffle 4 is fixedly connected to the end near the first baffle 11. The power input terminal of the worm gear motor 5 is connected to the power supply through a two-way switch 12. The two-way switch 12 is used to change the current direction to realize the forward and reverse rotation of the worm gear motor 5, thereby driving the push-pull rod 8 to move in the horizontal direction. Two coil supports 10 adapted to the iron core of the saturated reactor to be tested are provided on the base plate 9 between the first baffle 11 and the second baffle 4. A first strip hole 15 is provided on the base plate 9 outside the coil support 10 along the edge where the coil support 10 and the base plate 9 meet. The coil 3 passes through the first strip hole 15 and is wound on the coil support 10.

[0008] The first baffle 11 has a protrusion 13 on the same side of the bottom as the limiting shaft 1, and the bottom plate 9 at the corresponding position of the protrusion 13 has a limiting hole 14 that matches the protrusion 13.

[0009] The power source is a battery 7 fixed on the base plate 9.

[0010] On the base plate 9 along the outer edge of the iron core of the saturated reactor to be tested, a plurality of limiting blocks 2 are provided, and at least one limiting block 2 is provided on each side of the iron core of the saturated reactor to be tested.

[0011] The limiting block 2 has two second strip holes 201, and is fastened to the base plate 9 by bolts passing through the second strip holes 201.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. High efficiency and batch applicability: Driven by a worm gear motor 5, clamping or loosening can be completed with one-button operation via a two-way switch 12. The clamping force is uniform, and the whole process takes only a few seconds, making it very suitable for rapid batch testing on the production line.

[0013] 2. Reliable and consistent clamping position: The mechanical limiting structure composed of the first baffle 11, the second baffle 4 and the limiting block 2 ensures that the final clamping position remains unchanged each time, thus improving stability.

[0014] 3. Compact structure and easy installation: The integrated design of the clamp allows for easy start-up by simply placing the iron core into the corresponding position of the coil bracket 10. It is easy to install and use.

[0015] 4. The limiting block 2 has a second strip hole 201, and is fastened to the base plate 9 by bolts passing through the second strip hole 201. The position of the limiting block 2 can be adjusted according to different types of iron cores, which improves its versatility.

[0016] In summary, this utility model offers high efficiency and stability in batch testing of iron cores, is simple to operate, has good universality, and is easy to produce and install. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a top view of the present invention.

[0019] Figure 3 This is a front view of the present invention.

[0020] Figure 4 This is the bottom view of the present invention.

[0021] Figure 5 This is a structural diagram of the limiting block 2 of this utility model.

[0022] In the diagram, 1 represents the limiting shaft; 2 represents the limiting block; 201 represents the second strip hole; 3 represents the coil; 4 represents the second baffle; 5 represents the worm gear motor; 6 represents the motor base; 7 represents the battery; 8 represents the push-pull rod; 9 represents the base plate; 10 represents the coil bracket; 11 represents the first baffle; 12 represents the two-way switch; 13 represents the protrusion; 14 represents the limiting hole; and 15 represents the first strip hole. Detailed Implementation

[0023] The structural and working principles of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] like Figures 1-4 As shown, a testing fixture for the core of a saturated reactor includes a mounting base plate 9 and a limiting shaft 1, which serve as the entire fixture. The limiting shaft 1 has a threaded front section and a smooth rod rear section. A first baffle 11 is disposed at one end of the base plate 9. The limiting shaft 1 passes through a pre-drilled smooth through hole in the first baffle 11 and is fixed to one side wall of the base plate 9. The limiting shaft 1 is rotatably connected to the first baffle 11, allowing the first baffle 11 to rotate around the smooth rod as its axis. The first baffle 11 and... A protrusion 13 is provided on the bottom side of the limiting shaft 1. A limiting hole 14 adapted to the protrusion 13 is provided on the bottom plate 9 at the corresponding position. When the first baffle 11 is rotated to the working position, the protrusion 13 can be inserted into the limiting hole 14 on the bottom plate 9, thereby realizing the precise positioning and clamping of the first baffle 11 in the horizontal direction. This design allows the first baffle 11 to quickly switch between the two states of "fixed positioning" and "rotation opening", which greatly facilitates the picking and putting in of the half-width iron core.

[0025] At the other end of the base plate 9, a worm gear motor 5 is fixed via a motor base 6. The push-pull rod 8 of the worm gear motor 5 is perpendicular to the first baffle 11, and a second baffle 4 is fixedly connected to the end near the first baffle 11 by bolts. The power input terminal of the worm gear motor 5 is connected to a rechargeable lithium battery 7 fixed on the base plate 9 via a two-way switch 12. The two-way switch 12 is used to change the current direction, realizing the forward and reverse transmission of the worm gear motor 5, thereby driving the push-pull rod 8 to move in the horizontal direction, thereby driving the second baffle 4 to perform clamping and releasing actions. The operation is simple and easy to learn. The rechargeable lithium battery 7 has a long battery life, is environmentally friendly, and is safe to charge.

[0026] Two coil supports 10 adapted to the iron core of the saturated reactor to be tested are provided on the base plate 9 between the first baffle 11 and the second baffle 4. On the base plate 9 outside the coil support 10, a first strip hole 15 is provided along the edge where the coil support 10 and the base plate 9 meet. The coil 3 passes through the first strip hole 15 and is wound on the coil support 10. The coil 3 serves as an excitation coil or a measuring coil. Its position and number of turns are set during production. During testing, there is no need to wind the coil on site. It is only necessary to connect its terminals to the testing instrument.

[0027] Four limiting blocks 2 are provided on the base plate 9 along the outer edge of the iron core of the saturated reactor to be tested. The four limiting blocks 2 are respectively provided on both sides of the iron core of the saturated reactor to be tested. Each limiting block 2 has two second strip-shaped holes 201 (see Figure 5 The fixture is secured to the base plate 9 by bolts passing through the second slot 201. By loosening the bolts, the position of the limiting block 2 can be finely adjusted along the second slot 201 to accommodate iron cores of different sizes. After adjustment, the bolts are tightened. This fine-tuning function significantly improves the versatility of the fixture.

[0028] The working principle of this utility model is as follows: 1. Place the iron core: Lift the first baffle 11 upwards by hand so that its protrusion 13 is disengaged from the limiting hole 14 on the bottom plate 9, and then rotate it around the limiting shaft 1 to open it. Loosen the bolts that fasten the limiting block 2, first place half of the iron core against the inside of the first baffle 11, and then place the other half of the iron core in the corresponding position.

[0029] 2. Closure positioning: Rotate the first baffle 11 back to the working position to ensure that its protrusion 13 is engaged in the limiting hole 14 on 9, adjust the position of the limiting block 2, and tighten the bolts to complete the initial positioning.

[0030] 3. Automatic clamping: Pressing the two-way switch 12 controls the worm gear motor 5 to push the second baffle 4 towards the first baffle 11 through the push-pull rod 8, so that the two halves of the iron core are tightly pressed between the two baffles.

[0031] 4. Perform the test: Connect the terminals of the pre-integrated coil 3 to the test instrument and start the test.

[0032] 5. Automatic release and removal: After the test is completed, press the two-way switch 12 to control the worm gear motor 5 to pull the second baffle 4 away from the first baffle 11 via the push-pull rod 8 to release the iron core. Then, the first baffle 11 can be rotated open to easily remove the tested iron core.

Claims

1. A testing fixture for the core of a saturated reactor, comprising a base plate (9) and a limiting shaft (1), characterized in that, One end of the base plate (9) is provided with a first baffle (11). The limiting shaft (1) passes through the reserved through hole on the first baffle (11) and is fixed to one end of the side wall of the base plate (9). The limiting shaft (1) is rotatably connected to the first baffle (11). A worm gear motor (5) is installed at the other end of the base plate (9). The push-pull rod (8) of the worm gear motor (5) is perpendicular to the first baffle (11) and a second baffle (4) is fixedly connected at the end near the first baffle (11). The power input end of the worm gear motor (5) is connected to the power supply through a two-way switch (12). The two-way switch (12) is used to change the current direction to realize the forward and reverse rotation of the worm gear motor (5), thereby driving the push-pull rod (8) to move in the horizontal direction. Two coil supports (10) adapted to the iron core of the saturated reactor to be tested are provided on the base plate (9) between the first baffle (11) and the second baffle (4). On the base plate (9) outside the coil support (10), a first strip hole (15) is provided along the edge where the coil support (10) and the base plate (9) meet. The coil (3) passes through the first strip hole (15) and is wound on the coil support (10).

2. The detection fixture according to claim 1, characterized in that, The first baffle (11) has a protrusion (13) on the same side of the bottom of the limiting shaft (1), and a limiting hole (14) adapted to the protrusion (13) is opened on the bottom plate (9) at the corresponding position of the protrusion (13).

3. The detection fixture according to claim 1, characterized in that, The power source is a battery (7) fixed on the base plate (9).

4. The detection fixture according to claim 1, characterized in that, Multiple limiting blocks (2) are provided on the base plate (9) along the outer edge of the iron core of the saturated reactor to be tested. At least one limiting block (2) is provided on each side of the iron core of the saturated reactor to be tested.

5. The detection fixture according to claim 4, characterized in that, The limiting block (2) has two second strip holes (201) and is fastened to the base plate (9) by bolts passing through the second strip holes (201).

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