Anti-deformation device for molded case potting mutual inductor

Abstract

The utility model discloses an anti-deformation device used for a plastic casing potting mutual inductor, which comprises a base and cross-shaped telescopic rods arranged around the base, the four telescopic rods are of the same structure, each telescopic rod comprises an outer rod and an inner rod, one end of each outer rod is connected onto the base, the other end of each outer rod is inserted into the corresponding inner rod, and the outer rod is connected onto the base. The diameter of the outer rod is larger than that of the inner rod and smaller than two times that of the inner rod, a fixing inserting hole is formed in the side face of the end, away from the base, of the outer rod, a jackscrew is inserted into the fixing inserting hole, and a baffle is welded to the other end of the inner rod. The anti-deformation device is easy to manufacture, low in cost and convenient to operate, and can effectively fix the four side faces of the molded case potting mutual inductor, so that when polyurethane resin releases heat in the reaction process, the shell cannot bulge or cannot be cracked from a bonding seam in a supporting mode; meanwhile, in the process of bonding the shell, the shell can be supported from the inside, and the phenomenon that the shell is concave inwards due to the fact that the shell is too thin or too large in size, and the bonding efficiency is affected is avoided.

Description

Technical Field

[0001] The utility model relates to a deformation prevention device, in particular to a deformation prevention device for a plastic shell potted transformer, which can achieve the purpose of multiple uses of a tooling. Background Art

[0002] The gas-insulated switchgear was first developed and researched by Japan in the 1970s and 1980s. Subsequently, corresponding products were announced successively in various countries around the world. The main voltage levels are 7.2 - 126 kV. At first, all busbars, components, transformers, etc. were installed in a sealed box. In the 1990s, the 24 - 36 kV gas-insulated switchgear had a rapid development. Transformers and the like have been placed outside the gas box, and the solid interface insulation technology has been applied to the plugging of high-voltage components. The plastic shell potted transformer is a kind of product in the gas-insulated switchgear. Since the plastic shell potted transformer product has an adhesive shell structure, some technical problems will be encountered in the manufacturing process, such as the shell being deformed and cracked by heat, affecting the product qualification rate. During the bonding process, it is necessary to manually fix the shell with hands and then release it to perform the next operation after the two-layer shell is firmly bonded, which is both time-consuming and labor-consuming. The traditional tooling can only fix the four outer surfaces of the shell, and each tooling corresponds to a single product model size, with poor flexibility. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defect that each tooling corresponds to a single product model size and has poor flexibility in the above-mentioned existing technology, and provide a deformation prevention device for a plastic shell potted transformer, so as to effectively fix the four sides of the plastic shell potted transformer, with low cost and convenient operation.

[0004] To achieve the above purpose, the present invention adopts the following technical scheme: A deformation prevention device for a plastic shell potted transformer, including a square base, and cross-shaped telescopic rods are made around the base. The four telescopic rods have the same structure. The telescopic rod includes an outer rod and an inner rod. One end of the outer rod is connected to the base, and the other end of the outer rod is inserted into the inner rod. The diameter of the outer rod is greater than the diameter of the inner rod and less than twice the diameter of the inner rod. A fixing jack is provided on the side of the outer rod far from the base. A set screw is inserted into the fixing jack, and a baffle is welded to the other end of the inner rod.

[0005] Preferably, one end of the outer rod is welded to the base horizontally.

[0006] Preferably, the baffle is rectangular.

[0007] An application of a deformation prevention device for a plastic shell potted transformer in bonding the shell or potting the product.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: The present utility model provides a deformation prevention device for a plastic shell potted transformer. By setting a cross-shaped telescopic rod, the deformation prevention device can be applied to shells of various sizes; by setting fixed jacks, the deformation prevention device can stably maintain the required length after being adjusted to the required length; by setting baffles, the contact area with the shell can be effectively increased to prevent the shell from bulging and cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 FIG. is a three-dimensional structural schematic diagram of a deformation prevention device for a plastic shell potted transformer according to the present utility model.

[0010] Figure 2 FIG. is a schematic plan view of the base of a deformation prevention device for a plastic shell potted transformer according to the present utility model.

[0011] Figure 3 FIG. is a schematic plan view of a deformation prevention device for a plastic shell potted transformer according to the present utility model.

[0012] Figure 4 FIG. is a top view of a deformation prevention device for a plastic shell potted transformer according to the present utility model.

[0013] Figure 5 FIG. is a schematic structural diagram of the telescopic rod in a contracted state according to the present utility model.

[0014] Figure 6 FIG. is a schematic structural diagram of the telescopic rod in a stretched state according to the present utility model.

[0015] Figure 7 FIG. is a three-dimensional view of a deformation prevention device for a plastic shell potted transformer according to the present utility model when bonding the shell.

[0016] Figure 8 FIG. is a three-dimensional view of a deformation prevention device for a plastic shell potted transformer according to the present utility model after product potting.

[0017] Reference numerals in the figures: 1, base; 2, outer rod; 3, inner rod; 4, fixed jack; 5, setscrew; 6, baffle; 7, plastic shell; 8, product. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0019] To solve a series of problems such as the singularity in the use of tooling in the prior art, thermal deformation and cracking of the housing, and the need for manual fixing of the housing during the bonding process, the present utility model provides a deformation prevention device for use in a plastic shell potted transformer. The specific structure is shown in Figures 1 to 8 As shown, it includes a square base 1, and cross-shaped telescopic rods are made around the base 1. The structures and working principles of the four telescopic rods are the same. Taking the telescopic rod in one direction as an example for description, one end of the outer rod 2 of the telescopic rod is welded to the base 1 horizontally. The other end of the outer rod 2 is used to insert the inner rod 3. The diameter of the outer rod 2 is larger than that of the inner rod 3 and less than twice the diameter of the inner rod 3, so that the inner rod 3 can be freely pulled in and out of the outer rod 2 with a small gap. A fixed jack 4 is provided on the side of the outer rod 2 away from the base. After the distance of the telescopic rod is adjusted to the required length, the set screw 5 is inserted into the fixed jack 4 and tightened until it is fastened, so that the inner rod 3 cannot be freely pulled, to fix the inner rod 3. The other end of the inner rod 3 is welded with a rectangular baffle, which is used to fix the inner and outer surfaces of the housing to prevent the housing from deforming.

[0020] During the actual use of this device:

[0021] 1) When used for bonding the housing:

[0022] When the housing is large in size or thin, the four surfaces of the housing are concave. When bonding the housing, insert the inner rod 3 into the outer rod 2 to make the device in the minimum size state. Put a layer of plastic shell over the 4 baffles, pull out the four inner rods 3, and adjust the pulled-out distance of the inner rods 3 according to the housing size. When the four baffles 6 are sufficient to support the concave housing surface, insert the set screw 5 into the fixed jack 4 and tighten it to make the telescopic rod stably maintain the required length. Drop glue at the housing joint, pick up the second layer of the housing and directly put it over the baffle 6 to bond with the first layer of the housing, and so on, achieving the purpose of saving time and effort in the process of bonding the housing.

[0023] 2) When used for potting the product:

[0024] Place the deformation prevention device on a horizontal operating table, pull out the four telescopic rods, put the housing to be potted into the device, slowly push the inner rod 3 into the outer rod 2, adjust the distance of the telescopic rod. When the four baffles 6 are closely attached to the outer surface of the housing, insert the set screw 5 into the fixed jack 4 and tighten it to make the telescopic rod stably maintain the required length. Install a coil in the housing and use polyurethane resin for potting; if the housing is relatively high and the height of the baffle is not enough to cover the easily deformed area, another set of the same tooling can be taken and used upside down.

[0025] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An anti-deformation device for a molded case potted mutual inductor, characterized in that: The invention comprises a square base (1), and cross-shaped telescopic rods are arranged around the base (1) with the base (1) as the center. The four telescopic rods have the same structure. The telescopic rods comprise an outer rod (2) and an inner rod (3). One end of the outer rod (2) is connected to the base (1), and the other end of the outer rod (2) is inserted into the inner rod (3). The diameter of the outer rod (2) is larger than the diameter of the inner rod (3) and smaller than 2 times the diameter of the inner rod (3). A fixing hole (4) is provided on the side of one end of the outer rod (2) away from the base (1), and a top screw (5) is inserted into the fixing hole (4). A baffle (6) is welded to the other end of the inner rod (3).

2. The anti-deformation device for a molded case potted mutual inductor according to claim 1, characterized in that: One end of the outer rod (2) is horizontally welded to the base (1).

3. The anti-deformation device for a molded case potted mutual inductor according to claim 1, characterized in that: The baffle (6) is rectangular.

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