Protective device for transformer with electric connector in paint dipping process

Abstract

The utility model discloses a protective device for a transformer with an electrical connector in a paint dipping process. Comprising a protection block (1), a protection cavity (2) used for covering an electrical connector (5) on the transformer is formed in the bottom end face of the protection block (1), and the top of the protection cavity (2) is communicated with a vent hole (3) penetrating through the top end face of the protection block (1). According to the utility model, paint dipping materials can be prevented from being contacted with the electrical connector (5), and the electrical performance of the transformer is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical assembly and adjustment, and in particular relates to a protective device for the paint dipping process of a transformer with an electrical connector. Background Art

[0002] The pin-type autotransformer adopts a unique structure, which mainly optimizes the input and output of the transformer coil from the previous wire form to the pin welding to the circuit board. The specific structure is shown in the attached Figure 1 The input and output ends of the transformer coil are connected to pins, which are welded to the corresponding welding holes of the circuit board 4. Finally, the signal input and output of the transformer are realized through two electrical connectors 5 on the circuit board. This structure effectively avoids the risk of human wiring errors, wire insulation wear or wire breakage.

[0003] This type of transformer needs to be fully dipped in paint to ensure the three-proof effect. During the dipping process, the protection of the electrical connector 5 directly affects the electrical performance of the transformer. The dipping process involves a vacuum process and a pressurization process, and sealing protection is more difficult. If the method of first dipping in paint and then removing the paint with chemical reagents is adopted, it is difficult to ensure the effectiveness of the electrical connection of the connector, which affects the performance of the transformer. In the method of full sealing protection, vacuuming will cause pores in the sealant, and the paint liquid will enter the protection area during the pressurization process, and the protection effect cannot be achieved. Utility Model Content

[0004] The purpose of the utility model is to provide a protective device for the varnishing process of a transformer with an electrical connector. The utility model can prevent the varnishing material from contacting the electrical connector, thereby ensuring the electrical performance of the transformer.

[0005] The technical solution of the utility model is: a protective device for the varnish dipping process of a transformer with an electrical connector, comprising a protective block, a bottom end surface of the protective block being provided with a protective cavity for covering the electrical connector on the transformer, and a top of the protective cavity being connected to a vent hole penetrating the top end surface of the protective block.

[0006] In the aforementioned protective device for the varnish dipping process of a transformer with an electrical connector, the protective cavity covers the electrical connector, and the bottom end surface of the protective block is bonded to the circuit board of the transformer by an easily peelable adhesive.

[0007] In the aforementioned protective device for the varnish dipping process of a transformer with an electrical connector, the protective block is made of polytetrafluoroethylene.

[0008] In the aforementioned protective device for the varnish dipping process of a transformer with an electrical connector, the vent hole is in a segmented structure, and the diameter of the vent hole of a segment close to one side of the protective cavity is larger than the diameter of the vent hole of another segment away from the side of the protective cavity.

[0009] In the aforementioned protective device for the transformer with electrical connector during varnish dipping, the diameter of the vent hole in a section close to one side of the protective cavity is 4 mm; the diameter of the vent hole in another section away from the side of the protective cavity is 2 mm.

[0010] In the aforementioned protective device for the transformer with electrical connector during varnish dipping, the easily peelable adhesive brand is 2211.

[0011] In the aforementioned protective device for the transformer with electrical connector during the varnishing process, the top surface of the protective block is 3-5 cm higher than the paint surface during varnishing.

[0012] The advantages of the utility model are:

[0013] 1. The utility model surrounds the electrical connector, and before varnishing, the contact part between the protective device and the circuit board is sealed and protected by glue, so as to prevent the varnishing material from contacting the electrical connector and ensure the electrical performance of the transformer.

[0014] 2. The paint immersion protection device of the utility model covers the electrical connector before paint immersion by setting a protection chamber. At the same time, the vent hole is set to connect the inside and outside of the protection chamber, so as to prevent the paint liquid from entering the protection chamber and splashing onto the electrical connector pins due to the pressure difference between the inside and outside of the protection chamber when pressurizing and vacuuming during the paint immersion process, thus solving the technical problem that the full-sealed protection method is prone to protection failure during the vacuum process.

[0015] 3. The protective block of the utility model is made of polytetrafluoroethylene with weak adsorption force, which is easy to clean after use and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a pin-type autotransformer;

[0017] Figure 2 Schematic diagram of the protective device installed on the autotransformer;

[0018] Figure 3 Schematic diagram of the protective device.

[0019] 1-protection block, 2-protection cavity, 3-vent, 4-circuit board, 5-electrical connector. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] The features and illustrative embodiments of various aspects of the utility model will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the utility model by illustrating examples of the utility model. The utility model is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the utility model. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the utility model.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can be referenced and cited to each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Example 1. A protective device for the varnishing process of a transformer with an electrical connector, see Figure 1-3 , including a protection block 1, the bottom end surface of the protection block 1 is provided with a protection cavity 2 for covering an electrical connector 5 on the transformer, and the top of the protection cavity 2 is connected to a vent hole 3 penetrating the top end surface of the protection block 1.

[0024] After the aforementioned protection cavity 2 covers the electrical connector 5, the bottom end surface of the protection block 1 is bonded to the circuit board 4 of the transformer by an easily peelable adhesive.

[0025] The aforementioned protection block 1 is made of polytetrafluoroethylene.

[0026] The aforementioned vent hole 3 is in a segmented structure, and the diameter of the vent hole of a segment close to one side of the protection cavity 2 is larger than the diameter of the vent hole of another segment away from the side of the protection cavity 2 .

[0027] The diameter of the vent hole of a section close to the side of the protective cavity 2 is 4 mm, and the diameter of the vent hole of another section away from the side of the protective cavity 2 is 2 mm. The vent hole on the top surface is smaller, which can effectively prevent the paint liquid from splashing into the protective cavity 2.

[0028] The aforementioned easy-to-peel adhesive has a brand number of 2211.

[0029] The top surface of the aforementioned protection block 1 is 3-5 cm higher than the paint surface during varnishing. This structure can further prevent the paint liquid from splashing into the protection cavity 2.

[0030] Figure 1This is a pin-type autotransformer model that needs protection. The output end of the transformer coil is soldered to the circuit board 4 through the pin. There are two electrical connectors 5 on the circuit board 4, which need to be protected during the overall varnishing process to ensure the subsequent electrical conduction of the conductive pins of the connector.

[0031] Based on the above requirements, the size of the protective cavity 2 of the protective device is determined according to the maximum external expansion size of the two electrical connectors 5, and a vent hole 3 is provided to connect the protective cavity 2 with the outside world.

[0032] The specific structure of the protective device is shown in Figure 3 The protective device includes a protective cavity 2 set according to the external size of the connector, and a vent hole 3 that connects the protective cavity 2 with the outside.

[0033] Before varnishing, the electrical connector 5 is covered by the protective cavity 2, and the circuit board 4 and the bottom end surface of the protective block 1 are coated with easy-to-peel glue and cured for protection. Then, the transformer circuit board 4 is placed face up in the varnishing container, and the insulating resin is poured in, with the liquid level higher than the circuit board 4. The varnishing container is smoothly moved to a high-temperature vacuum box for vacuum varnishing and high-temperature varnishing. After the varnishing is completed, the protective block 1 and the easy-to-peel glue are removed, and the electrical connector 5 is repainted with a brush around it to ensure the overall three-proof effect of the transformer.

[0034] The device is made of polytetrafluoroethylene, which has poor adsorption capacity. The tooling is easy to clean after use and can be reused.

[0035] The through holes of this device have two inner diameters. The inner diameter of the through hole at the connecting cavity end is 4mm, and the inner diameter of the through hole at the other end is 2mm, which reduces the splashing paint liquid entering the through hole during the immersion process and reduces the risk of through hole clogging.

Claims

1. A protective device for the varnishing process of a transformer with an electrical connector, characterized in that: The protective block (1) comprises a protective cavity (2) for covering an electrical connector (5) on a transformer, and a top of the protective cavity (2) is connected to a vent hole (3) penetrating the top end of the protective block (1).

2. The protective device for the varnishing process of a transformer with an electrical connector according to claim 1, characterized in that: After the protective cavity (2) covers the electrical connector (5), the bottom end surface of the protective block (1) is bonded to the circuit board (4) of the transformer by means of an easily peelable adhesive.

3. The protective device for the varnishing process of a transformer with an electrical connector according to claim 1, characterized in that: The protective block (1) is made of polytetrafluoroethylene.

4. The protective device for the varnishing process of a transformer with an electrical connector according to claim 1, characterized in that: The vent hole (3) is of segmented structure, and the diameter of the vent hole of a segment close to the side of the protective cavity (2) is larger than the diameter of the vent hole of another segment away from the side of the protective cavity (2).

5. The protective device for the varnishing process of a transformer with an electrical connector according to claim 4, characterized in that: The diameter of the vent hole in a section close to one side of the protection cavity (2) is 4 mm; the diameter of the vent hole in another section away from the side of the protection cavity (2) is 2 mm.

6. The protective device for the varnishing process of a transformer with an electrical connector according to claim 2, characterized in that: The easy-to-peel adhesive brand is 2211.

7. The protective device for the varnishing process of a transformer with an electrical connector according to claim 1, characterized in that: The top surface of the protective block (1) is 3-5 cm higher than the paint surface during varnishing.

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