Transformer magnetic shield mounting tool

Abstract

The utility model provides a kind of transformer magnetic shielding installation tool, for assisting with magnetic shielding plate and apron fastening on fixed stud, this transformer magnetic shielding installation tool includes: main part, the main part is flat plate, with the first surface and the second surface opposite to each other;A pair of bolt, on the first surface about the center of symmetry of main part is arranged, and vertically from the first surface outwardly convex;And drive joint, in the center of main part on the second surface is provided, and including in the center of main part vertically to the second surface extension drive hole.Especially, it also includes at least a pair of limit protrusion, at least a pair of limit protrusion about the center of symmetry of main part and protrude beyond the first surface.According to the transformer magnetic shielding installation tool of the present disclosure, by providing the bolt matched with the jack of apron and the limit protrusion adjoining with the outer circumferential surface of apron, effectively reduce the skidding phenomenon in installation process, improve installation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of transformers and relates to a magnetic shielding installation fixture for transformers. Background Technology

[0002] When a transformer is in operation, leakage magnetic field generated by the core and windings may penetrate the casing, causing surrounding metal components to overheat, interfering with nearby electronic equipment, and even endangering personnel safety. Therefore, especially in large power transformers, magnetic shielding devices are usually installed, which use highly permeable materials (such as silicon steel sheets, permalloy, etc.) to guide or absorb leakage magnetic field and reduce the intensity of the external magnetic field.

[0003] Common magnetic shielding devices consist of magnetic shielding plates (silicon steel sheet stacks) fixed to the inner wall of the tank or around the windings. The magnetic shielding plates can be fixed between the transformer core and the windings, for example, by insulating studs or non-magnetic clamps. For large transformers, the magnetic shielding plates can also be installed between the windings and the tank to avoid the formation of short-circuit loops.

[0004] To ensure the effectiveness of the magnetic shielding plate, it is necessary to ensure high installation quality and firmness. If the magnetic shielding plate is not installed properly or is not firmly fixed, it may shift, deform or even fall off during operation, which will lead to magnetic leakage. This may result in a series of consequences such as increased eddy current losses, increased temperature and reduced transformer efficiency in the transformer casing or other components. The risk of the magnetic shielding plate falling off may also pose a safety hazard to the equipment or operators.

[0005] To facilitate installation and maintenance, magnetic shielding panels sometimes employ a segmented structure. For example, the magnetic shielding panel may be divided into several pieces. During installation, each piece of the magnetic shielding panel is first fixed to its corresponding position on the iron core or oil tank, and then they are connected to form a complete shield.

[0006] One existing installation method involves first hanging the magnetic shielding plate onto the studs on the tank wall, then screwing a locking cover plate onto the studs and tightening it. The cover plate typically has standard dimensions and structure. For example, a common cover plate is disc-shaped with a central mounting hole. To facilitate tightening, the cover plate has two holes symmetrically arranged relative to the center. When installing the cover plate, a round, pointed tool can be inserted into the holes, and then the tool can be used to rotate the cover plate to tighten it onto the studs.

[0007] However, the existing tightening method has the following drawbacks: the two tips of the tool are prone to slipping out of the hole during use, which often causes slippage during operation. In addition, the tool is manually operated, which is not only time-consuming and laborious, but also makes it impossible to accurately control the tightening torque.

[0008] The applicant recognized that there was room for improvement in the installation difficulty, efficiency, and final effect of existing magnetic shielding devices.

[0009] Therefore, it is necessary to provide an installation tool that makes the installation process more coherent and efficient, and improves installation quality and operational safety, in order to solve the above-mentioned problems in the prior art. Utility Model Content

[0010] This disclosure is intended to provide a magnetically shielded mounting fixture that at least partially eliminates the deficiencies of the prior art.

[0011] One objective of this disclosure is to provide a magnetic shielding installation fixture that can reduce slippage during installation and improve efficiency.

[0012] Another objective of this disclosure is to provide a magnetically shielded installation fixture that can improve installation quality and operational safety.

[0013] To achieve at least one of the above objectives, according to one aspect of this disclosure, a transformer magnetic shielding mounting fixture is provided for assisting in fastening a magnetic shielding plate and a cover plate to a fixing stud. The transformer magnetic shielding mounting fixture includes: a main body portion, which is flat and has a first surface and a second surface facing away from each other; a pair of pins, which are symmetrically arranged about the center of the main body portion on the first surface and protrude perpendicularly outward from the first surface; and a drive connector, which is disposed on the second surface at the center of the main body portion and includes a drive hole extending perpendicularly to the second surface from the center of the main body portion; specifically, it further includes at least a pair of limiting protrusions, which are symmetrically arranged about the center of the main body portion and protrude beyond the first surface.

[0014] Specifically, at least one pair of limiting protrusions are arranged to be adjacent to the outer peripheral surface of the cover plate during use.

[0015] Specifically, the shape and spacing of a pair of pins are configured to be inserted into a pair of sockets that fit into the cover plate.

[0016] According to the embodiments of the present disclosure, the transformer magnetic shielding installation fixture provides a pin that mates with the insertion hole of the cover plate and a limiting protrusion that is adjacent to the outer peripheral surface of the cover plate. This ensures that the transformer magnetic shielding installation fixture and the cover plate remain firmly engaged during operation without slippage or detachment. As a result, the tightening operation is stable and continuous, saving manpower and improving installation efficiency.

[0017] Furthermore, the shape of the drive hole is configured to engage with the drive head of the torque wrench.

[0018] According to the embodiments of this disclosure, the transformer magnetic shielding installation fixture can precisely control the tightening torque with the help of a torque wrench, reducing the installation from being too tight or too loose due to uneven force during manual tightening, as well as the deformation, loosening or falling off of the magnetic shielding plate or cover plate due to uneven force, thus ensuring installation quality and operational safety.

[0019] Preferably, the wrench is an automatic torque wrench. When used in conjunction with an automatic torque wrench, the transformer magnetic shielding installation fixture according to embodiments of this disclosure further reduces manual operation, making it simple and labor-saving.

[0020] Optionally, at least one pair of limiting protrusions are arranged symmetrically about the center line of the first surface on opposite sides of the main body.

[0021] Optionally, the main body is disc-shaped, and at least one pair of limiting protrusions are two or more pairs of limiting protrusions arranged at equal intervals in the circumferential direction around the center of the main body.

[0022] Optionally, at least one pair of limiting protrusions extends from the first surface.

[0023] Optionally, at least one pair of limiting protrusions extend beyond the first surface from the edge of the body portion.

[0024] Preferably, at least one pair of limiting protrusions includes an anti-slip surface for direct contact with the outer peripheral surface of the cover plate.

[0025] The transformer magnetic shielding installation fixture according to the embodiments of this disclosure effectively solves the problem of tool slippage or detachment in the prior art, making the tightening operation stable and continuous, saving manpower and improving installation efficiency. Furthermore, the transformer magnetic shielding installation fixture according to the embodiments of this disclosure can be used in conjunction with a torque wrench to achieve precise torque control during tightening, improving installation quality and operational safety. Attached Figure Description

[0026] The features and advantages of one or more embodiments of the present invention will become more readily apparent from the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components. In the drawings:

[0027] Figure 1 An exploded view schematically illustrating the usage state of the transformer magnetic shielding mounting fixture according to the first embodiment of this disclosure;

[0028] Figure 2 A perspective view of a transformer magnetic shielding mounting fixture according to a first embodiment of the present disclosure is schematically shown;

[0029] Figure 3 A perspective view of the transformer magnetic shielding mounting fixture according to the first embodiment of this disclosure is shown schematically from another angle.

[0030] Figure 4 A schematic diagram of a transformer magnetic shielding mounting fixture according to a second embodiment of the present disclosure is shown;

[0031] Figure 5 A schematic diagram of a transformer magnetic shielding mounting fixture according to a third embodiment of the present disclosure is shown.

[0032] Explanation of icon numbers:

[0033] 10. Wall 12. Fixing studs

[0034] 20. Magnetic shielding plate; 22. Mounting holes

[0035] 30. Cover plate; 32. Insertion hole; 34. Threaded hole

[0036] 40. Transformer magnetic shielding installation fixture S1, first surface S2, second surface

[0037] 42. Main body; 44. Pin; 46. Limiting protrusion

[0038] 48. Drive connector H, drive hole

[0039] 50. Transformer magnetic shielding installation fixture; 52. Main body; 56. Limiting protrusion.

[0040] 60. Transformer magnetic shielding installation fixture; 62. Main body; 66. Limiting protrusion. Detailed Implementation

[0041] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise.

[0043] Figure 1 An exploded view schematically illustrating the usage state of the transformer magnetic shielding mounting fixture according to an embodiment of the present disclosure.

[0044] Reference Figure 1 When installing and fixing the magnetic shielding plate 20, firstly, the magnetic shielding plate 20 is hung on the fixing stud 12 through the mounting hole 22 and pressed against the wall surface 10. Then, the threaded hole 34 of the cover plate 30 is fitted onto the fixing stud 12. In the prior art, a tool with two pointed tips is usually used to tighten the cover plate 30. During tightening, the two pointed tips of the tool need to be inserted into a pair of insertion holes 32 of the cover plate 30, and then the tool is manually operated to rotate the cover plate 30, thereby tightening the cover plate 30 onto the fixing stud 12. The existing tightening method has the following drawbacks: the two pointed tips of the tool are prone to slipping out of the holes during use, causing the operation to be frequently interrupted due to slippage, affecting efficiency. Furthermore, this operation is all carried out manually by workers, which is not only time-consuming and labor-intensive, but also makes it impossible to accurately control the tightening torque.

[0045] As an improvement on the prior art, this disclosure provides a transformer magnetic shielding installation fixture 40 for assisting in fastening the magnetic shielding plate 20 and the cover plate 30 to the fixing studs 12 on the wall surface 10 of the transformer.

[0046] See Figure 2 and Figure 3 The transformer magnetic shielding mounting fixture 40 includes: a main body 42, which is flat and has a first surface S1 and a second surface S2 facing away from each other, wherein the first surface S1 faces the cover plate 30 in use; a pair of pins 44, which are symmetrically arranged on the first surface S1 about the center of the main body 42 and protrude vertically outward from the first surface S1; and a drive connector 48, which is disposed on the second surface S2 at the center of the main body 42 and includes a drive hole H extending perpendicularly to the second surface S2 at the center of the main body 42. In particular, the transformer magnetic shielding mounting fixture 40 also includes at least a pair of limiting protrusions 46, which are symmetrically arranged about the center of the main body 42 and protrude beyond the first surface S1.

[0047] like Figure 2 As shown, as an exemplary embodiment, the transformer magnetic shielding mounting fixture 40 includes only a pair of limiting protrusions 46.

[0048] In use, the pair of limiting protrusions 46 are adjacent to the outer peripheral surface of the cover plate 30, and the shape and spacing of the pair of pins 44 are configured to be inserted into a pair of holes 32 of the cover plate 30.

[0049] In this way, during the process of tightening the cover plate 30 onto the fixing stud 12, the engagement of the pin 44 with the insertion hole 32 of the cover plate 30 and the proximity of the limiting protrusion 46 to the outer peripheral surface of the cover plate 30 can ensure a stable connection between the transformer magnetic shielding installation fixture 40 and the cover plate 30 during operation, thereby ensuring that the two will not slip or separate due to relative movement.

[0050] Therefore, the transformer magnetic shielding installation fixture according to the embodiments of this disclosure effectively solves the problem of tool slippage or detachment in the prior art, making the tightening operation stable and continuous, saving manpower and improving installation efficiency.

[0051] Furthermore, the shape of the drive hole H is designed to engage with the drive head of a standard torque wrench, so that the transformer magnetic shielding mounting fixture 40 can be rotated by operating the wrench, thereby causing the cover plate 30 to be rotated and tightened on the fixing stud 12. In this way, the tightening torque can be precisely controlled with the help of a torque wrench, reducing the risk of over-tightening or over-loosening of the installation due to uneven force during manual tightening, as well as deformation, loosening or detachment of the magnetic shielding plate or cover plate due to uneven force, thus ensuring installation quality and operational safety.

[0052] The torque wrench can be a manual mechanical torque wrench. However, more preferably, it is an automatic torque wrench. The automatic rotation of the automatic torque wrench further saves manpower, making the installation of the magnetic shielding plate simpler and easier.

[0053] The above is merely a specific example of the transformer magnetic shielding installation fixture described in this disclosure. However, it should be understood that this disclosure is not limited to the form of the above example. For example, the main body of the transformer magnetic shielding installation fixture can have different shapes, such as square, circular, drum-shaped, elliptical, etc., and can include two or more pairs of limiting protrusions, and the layout and shape of the limiting protrusions can also adopt various different schemes.

[0054] For example, Figure 4 A transformer magnetic shielding mounting fixture 50 according to another exemplary embodiment of the present disclosure is shown. As shown, it includes two pairs of limiting protrusions 56 symmetrically arranged on opposite sides of the main body 52.

[0055] Figure 5 A transformer magnetic shielding mounting fixture 60 according to yet another exemplary embodiment of the present disclosure is shown. As shown, the main body 62 is disc-shaped and includes three pairs of limiting protrusions 66 arranged at equal intervals in the circumferential direction around the center of the main body 62.

[0056] In addition, such as Figure 5As shown, the three pairs of limiting protrusions 66 no longer extend from the first surface, but extend beyond the first surface in a claw shape from the edge of the main body 62 to abut against the outer peripheral surface of the cover plate 30.

[0057] Furthermore, the limiting protrusion may also include an anti-slip surface for direct contact with the outer peripheral surface of the cover plate 30. This anti-slip surface is provided, for example, by a structure such as a rubber pad or an elastic material coating (e.g., a rubber coating). By providing this elastic anti-slip surface, the friction and gripping force between the limiting protrusion and the outer peripheral surface of the cover plate can be further improved, thereby more effectively preventing slippage or detachment of the transformer magnetic shielding installation fixture during use, and also improving the wear resistance and cushioning performance of the transformer magnetic shielding installation fixture.

[0058] Based on the above description of specific embodiments of the transformer magnetic shielding installation fixture according to this disclosure, it can be seen that the transformer magnetic shielding installation fixture of this disclosure mainly includes: a flat body; a pair of pins disposed on a first surface of the body for insertion into the insertion holes of the magnetic shielding cover plate; a drive connector disposed on a second surface of the body for engaging with the square hole of a standard torque wrench; and at least a pair of limiting protrusions for engaging (grabbing) the outer peripheral wall of the cover plate.

[0059] The transformer magnetic shielding installation fixture according to embodiments of this disclosure effectively solves the problem of tool slippage or detachment in the prior art, making the tightening operation stable and continuous, saving manpower and improving installation efficiency. Furthermore, the transformer magnetic shielding installation fixture according to embodiments of this disclosure can be used in conjunction with a torque wrench to achieve precise torque control during tightening, improving installation quality and operational safety. Testing has shown that using the magnetic shielding installation fixture according to this disclosure improves the installation efficiency of magnetic shielding, reduces working hours by more than 80%, and reduces the risks associated with installation quality by more than 80%.

[0060] The main improvements and effects are as follows:

[0061] ①The transformer magnetic shielding installation fixture has at least one pair of limiting protrusions, which are used to abut against the outer peripheral surface of the cover plate during use. This ensures that the transformer magnetic shielding installation fixture maintains a high degree of centering and fit relative to the cover plate when tightening the cover plate, preventing slippage or detachment.

[0062] ②The drive connector of the transformer magnetic shielding installation fixture is designed to cooperate with the drive head of the torque wrench, thereby achieving the function of precise torque control.

[0063] ③ At least one pair of limiting protrusions includes an anti-slip surface for direct contact with the outer peripheral surface of the cover plate, further improving the friction and gripping force between the limiting protrusions and the outer peripheral surface of the cover plate.

[0064] The various embodiments and variations of this utility model have been described in detail above. However, those skilled in the art should understand that this utility model is not limited to the specific embodiments and variations described above, but may include various other possible combinations and arrangements. Other variations and modifications can be implemented by those skilled in the art without departing from the spirit and scope of this utility model. All these variations and modifications fall within the scope of this utility model. Moreover, all components described herein can be replaced by other technically equivalent components.

Claims

1. A transformer magnetic shielding installation fixture, used to assist in fastening a magnetic shielding plate (20) and a cover plate (30) to a fixing stud (12), the transformer magnetic shielding installation fixture comprising: Main body (42; 52; 62), the main body (42; 52) ； 62) It is flat and has a first surface (S1) and a second surface (S2) that are opposite to each other; A pair of pins (44) are arranged symmetrically about the center of the main body (42; 52; 62) on the first surface (S1) and protrude perpendicularly outward from the first surface (S1), wherein the shape and spacing of the pair of pins (44) are configured to be inserted into a pair of holes (32) of the cover plate (30); and A drive connector (48) is disposed on the second surface (S2) at the center of the main body (42; 52; 62) and includes a drive hole (H) extending perpendicularly to the second surface (S2) at the center of the main body (42; 52; 62); Its features are, It also includes at least one pair of limiting protrusions (46; 56; 66), which are arranged symmetrically about the center of the main body (42; 52; 62) and configured to protrude beyond the first surface (S1) to abut against the outer peripheral surface of the cover plate (30) in use.

2. The transformer magnetic shielding installation fixture according to claim 1, characterized in that, The drive hole (H) is shaped to engage with the drive head of a torque wrench.

3. The transformer magnetic shielding installation fixture according to claim 2, characterized in that, The torque wrench is an automatic torque wrench.

4. The transformer magnetic shielding installation fixture according to claim 1, characterized in that, The at least one pair of limiting protrusions are arranged symmetrically about the center line of the first surface on opposite sides of the main body.

5. The transformer magnetic shielding installation fixture according to claim 1, characterized in that, The main body is disc-shaped, and the at least one pair of limiting protrusions are two or more pairs of limiting protrusions arranged at equal intervals in the circumferential direction around the center of the main body.

6. The transformer magnetic shielding installation fixture according to any one of claims 1 to 5, characterized in that, The at least one pair of limiting protrusions extend from the first surface (S1).

7. The transformer magnetic shielding installation fixture according to any one of claims 1 to 5, characterized in that, The at least one pair of limiting protrusions extend from the edge of the main body beyond the first surface (S1).

8. The transformer magnetic shielding installation fixture according to any one of claims 1 to 5, characterized in that, The at least one pair of limiting protrusions (46; 56; 66) includes an anti-slip surface for direct contact with the outer peripheral surface of the cover plate (30).

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