Fixing structure for magnetic shielding device of transformer oil tank

Abstract

The utility model discloses a fixing structure for a magnetic shielding device of a transformer oil tank, which comprises a fastening plate, a clamping mechanism is clamped on the fastening plate, the clamping mechanism comprises a support plate, clamping plates are symmetrically arranged on two sides of the bottom of the support plate, clamping pieces are arranged on the clamping plates, and the clamping pieces are connected with the fastening plate. Clamping bolts are connected to the two sides of the top of the support plate in a threaded mode, a clamping plate is arranged on the clamping bolts in a penetrating mode, a clamping interval is formed between the clamping plate and the support plate, and the upper portion of the fastening plate is clamped in the clamping interval. According to the scheme, the magnetic shielding device in the magnetic shielding device can be quickly fixed, shaking is prevented, and the magnetic shielding effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic shielding technology, specifically relating to a fixed structure for a magnetic shielding device for a transformer tank. Background Technology

[0002] As a large power installation, especially for oil-immersed power transformers, when the distance between the coil and the tank wall of an oil-immersed power transformer is small, it is necessary to install oil tank magnetic shielding to reduce the heat generated by the tank wall and ensure the safe operation of the transformer. Therefore, the oil tank magnetic shielding device used for transformers is an important transformer component. In the existing oil tank magnetic shielding devices used for transformers, four layers of insulating materials are generally used, with two layers on the front and two layers on the back, wrapped with silicon steel sheets.

[0003] Traditional magnetic shielding structures often consist of several large steel plates mounted on the walls of a enclosure. When these large steel plates are stacked, their large surface area easily leads to stress concentration at the stacking points, resulting in structural instability, wobbling, and compromised magnetic shielding effectiveness. Therefore, as... Figure 5 As shown, the applicant's previous patent application designed a new solution using a magnetic shield 18 made of vertically stacked small-area steel plates. This allows for a tighter contact, resulting in better vertical stability and reduced wobbling, thus ensuring effective magnetic shielding. Simultaneously, a square fixing plate 19 is used to fix the shield to the periphery of the stacked steel plates, preventing vibration and further enhancing stability. However, because the stacked steel plates vary in type and specification, the width of the resulting magnetic shield also differs. Therefore, the fixing plate 19 alone cannot flexibly fix the magnetic shield 18 formed by steel plates of different specifications. Utility Model Content

[0004] To solve the above problems, this utility model provides a fixing structure for a transformer tank magnetic shielding device, including a fastening plate. A clamping mechanism is snapped onto the fastening plate. The clamping mechanism includes a support plate. Clamping plates are symmetrically arranged on both sides of the bottom of the support plate. Clamping elements are provided on the clamping plates. Clamping bolts are threaded to both sides of the top of the support plate. Clamping plates are inserted through the clamping bolts. A clamping gap is formed between the clamping plates and the support plate. The upper part of the fastening plate is snapped into the clamping gap.

[0005] Preferably, a guide rod is connected to the clamping plate, the guide rod passes through the bracket plate, and the guide rod is slidably connected to the bracket plate.

[0006] Preferably, the clamping member includes a threaded rod, one end of which is connected to a toggle block, and the other end of which passes through a clamping plate and is connected to a clamping block.

[0007] Preferably, the clamping piece comprises an outer shell fixed inside the clamping plate, an inner cavity is arranged in the outer shell, a clamping rod is slidably arranged on the inner cavity, a suction cup is connected to the front end of the clamping rod, a spring and a push-pull rod are connected to the rear end of the clamping rod, the spring is connected to the side wall of the inner cavity, and the push-pull rod passes through the outer shell.

[0008] Preferably, the two sides of the fastening plate are provided with locking bolts.

[0009] The utility model discloses the advantages are:

[0010] 1. The utility model discloses the design of clamping mechanism can flexibly adapt to different width and size's magnetic shield. Because the clamping piece on the clamping plate can adjust position, therefore can closely fix various size's magnetic shield, improved the versatility and practicality of device.

[0011] 2. The utility model discloses the double fixing of fastening plate and clamping mechanism, ensures the stability of magnetic shield in transformer oil tank. The fastening plate carries out the front -back fixed to magnetic shield, prevents its from falling off from the slot. And clamping mechanism then carries out the left -right fixed to magnetic shield, prevents it from shaking, thereby guaranteeing the stability and reliability of magnetic shield effect.

[0012] 3. The utility model discloses still through adopting the clamping rod and spring design in the outer shell interior, make clamping mechanism can more flexibly adapt to different width and thickness's magnetic shield. The spring force can be automatically regulated according to the size of magnetic shield, ensures that clamps closely and stably. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure diagram of the utility model installation on the fastening plate.

[0014] Figure 2 It is the back structure diagram of the utility model.

[0015] Figure 3 It is the front structure diagram of the utility model.

[0016] Figure 4 It is another clamping piece structure diagram of the utility model.

[0017] Figure 5 It is the magnetic shield device structure diagram of the utility model.

[0018] In the drawing: 1 fastening plate, 2 support plate, 3 clamping plate, 4 clamping bolt, 5 clamping plate, 6 clamping interval, 7 guide rod, 8 threaded rod, 9 shift block, 10 clamping block, 11 outer shell, 12 inner cavity, 13 clamping rod, 14 suction cup, 15 spring, 16 push-pull rod, 17 locking bolt, 18 magnetic shield, 19 fixed plate. DETAILED DESCRIPTION

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Simultaneously, when an component is referred to as "fixed to" or "equipped on" another component, it can be directly on the other component or may have an intervening component present. When an component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present. When an component is referred to as "fixedly connected to" another component, it can be a common fixed connection method such as welding, bolting, or gluing. In short, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1, as Figures 1-3 As shown, a fixing structure for a transformer tank magnetic shielding device includes a fastening plate 1. A clamping mechanism is snapped onto the fastening plate 1, and locking bolts 17 are provided on both sides of the fastening plate, which are then fixed to the corresponding mounting plate. The fastening plate 1 is used to fix the magnetic shielding device 18 formed of steel plate from front to back, preventing the magnetic shielding device 18 from falling out of the groove. The clamping mechanism on the fastening plate 1 is used to fix the magnetic shielding device 18 in the groove from side to side, preventing it from shaking and affecting its magnetic shielding effect.

[0023] The clamping mechanism includes a support plate 2, with clamping plates 3 symmetrically arranged on both sides of the bottom of the support plate 2. Clamping components are mounted on the clamping plates 3. Clamping bolts 4 are threaded onto both sides of the top of the support plate 2, and clamping plates 5 pass through the clamping bolts 4, forming a clamping gap 6 between the clamping plates 5 and the support plate 2. A fastening plate 1 is positioned above and within this gap. The clamping mechanism is initially connected to the fastening plate 1. By rotating the clamping bolts, the clamping plates gradually approach the support plate 2, reducing the gap and allowing the support plate 2 to engage with it. Simultaneously, the support plate 2 can be adjusted in position on the mounting plate to correspond to the location of the magnetic shield 18, improving installation accuracy and convenience. A guide rod 7 is connected to the clamping plate 5, passing through the support plate 2 and slidably connected to it.

[0024] After the clamping mechanism is fixed to the fastening plate 1, the clamping plates 3 on both sides of the bottom of the support plate 2 are positioned on both sides of the magnetic shield 18. The clamping components include a threaded rod 8, one end of which is connected to a toggle block 9, and the other end of which passes through the clamping plate 3 and is connected to a clamping block 10. By rotating the toggle block, the clamping blocks 10 on both sides gradually approach the magnetic shield 18, thus fixing the magnetic shield 18 in place. Rotating the clamping bolt 4 and the toggle block 9 allows for easy adjustment of the position and tightness of the clamping mechanism and the fastening plate 1, making installation and disassembly simple and quick. The clamping mechanism is designed to flexibly adapt to magnetic shields 18 of different widths and specifications. Because the clamping components on the clamping plate 3 can be adjusted, magnetic shields 18 of various sizes can be tightly fixed, improving the versatility and practicality of the device. The double fixing by the fastening plate 1 and the clamping mechanism ensures the stability of the magnetic shield 18 in the transformer tank. The fastening plate 1 fixes the magnetic shield 18 at the front and back to prevent it from falling out of the groove; while the clamping mechanism fixes the magnetic shield 18 from the left and right to prevent it from shaking, thereby ensuring the stability and reliability of the magnetic shielding effect.

[0025] Example 2, combined with Figure 4 This embodiment has the same parts as in embodiment 1. The difference in this embodiment is that the clamping member in this embodiment includes an outer shell 11, which is fixed inside the clamping plate 3. The outer shell 11 has an inner cavity 12 inside, and a clamping rod 13 is slidably arranged on the inner cavity 12. The front end of the clamping rod 13 is connected to a suction cup 14, and the rear end of the clamping rod 13 is connected to a spring 15 and a push-pull rod 16. The spring 15 is connected to the side wall of the inner cavity 12, and the push-pull rod 16 is set through the outer shell 11.

[0026] When the clamping mechanism is fixed on the fastening plate 1, the clamping plates 3 on both sides of the bottom of the support plate 2 are located on both sides of the magnetic shield 18, by pulling the push-pull rod 16, the spring 15 is retracted, then the clamping plates 3 on both sides are moved to both sides of the magnetic shield 18, the push-pull rod 16 is released, and the magnetic shield is fixed left and right by the elastic force of the spring 15. By adopting the clamping rod 13 and spring 15 design inside the shell 11, the clamping mechanism can be more flexible to adapt to magnetic shields 18 of different widths and thicknesses. The elastic force of the spring 15 can be automatically adjusted according to the size of the magnetic shield 18, ensuring that the clamping is tight and stable. Compared with the traditional threaded rod 8 and the push block 9, the design of using the push-pull rod 16 and the spring 15 greatly simplifies the operation process. The user only needs to pull the push-pull rod 16, and the position of the clamping rod 13 can be easily adjusted, and after releasing, the spring 15 will automatically push the clamping rod 13 to the fixed position, without the cumbersome rotation and adjustment. The design of the suction cup 14 at the front end of the clamping rod 13 can be more effectively adsorbed on the surface of the magnetic shield 18, even in the condition of vibration or impact, it can maintain stable clamping force, so as to ensure the safety of the transformer operation.

[0027] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fixing structure for a magnetic shield device for a transformer oil tank, characterized by: The utility model provides a fastening plate (1), the fastening plate (1) is clamped with the clamping mechanism, the clamping mechanism includes the support plate (2), the bottom both sides of support plate (2) are equipped with the clamping plate (3) symmetry, be equipped with the clamping piece on the clamping plate (3), the top both sides of support plate (2) are threadedly connected with the clamping bolt (4), the clamping bolt (4) is equipped with the clamping plate (5) and is passed, the clamping plate (5) and support plate (2) form the clamping interval (6) between, the fastening plate (1) is clamped in the clamping interval in the top.

2. The fixing structure for a magnetic shield of a transformer oil tank according to claim 1, characterized in that: The clamping plate (5) is connected with the guide rod (7), the guide rod (7) passes through the support plate (2) and is arranged, and the guide rod (7) and the support plate (2) are slidably connected.

3. The fixing structure for a magnetic shield of a transformer oil tank according to claim 2, characterized in that: The clamping piece includes the threaded rod (8), one end of the threaded rod (8) is connected with the knob (9), the other end of the threaded rod (8) passes through the clamping plate (3) and is connected with the clamping block (10).

4. The fixing structure for a magnetic shield of a transformer oil tank according to claim 2, characterized in that: The clamping piece includes the outer shell (11), the outer shell (11) is fixed in the clamping plate (3), the inside of outer shell (11) is equipped with the inner chamber (12), the inner chamber (12) is equipped with the clamping rod (13) and slides, the front end of clamping rod (13) is connected with the sucking disc (14), the rear end of clamping rod (13) is connected with spring (15) and push-pull rod (16), the spring (15) is connected with the lateral wall of inner chamber (12), and the push-pull rod (16) passes through the outer shell (11) and is arranged.

5. The fixing structure for a magnetic shield of a transformer oil tank according to claim 3, characterized in that: The both sides of fastening plate (1) are equipped with locking bolt (17).

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