Insulating pad for dry-type transformer

Abstract

The utility model relates to transformer insulating pad technology field, concretely is a kind of insulating pad for dry-type transformer, including bottom plate and top plate, bottom plate and the gasket group are equipped between top plate.This utility model inserts gasket group on bottom plate by means of locating block when installing insulating pad, inserts top plate on gasket group by means of locating block, the assembly of gasket group is also relied on locating block and is realized insertion, and the insertion of locating block and locating slot is passed through in horizontal direction, limit the left and right, front and back displacement of adjacent components;Through the clamping of elastic buckle and buckle slot in vertical direction, limit the up and down separation of adjacent components, double limit ensures that pad has no relative displacement under the vibration environment of transformer operation, gasket group is composed of multiple insulating gaskets, single gasket thickness is same, and the gradient adjustment of total height can be realized by increasing or decreasing the number of insulating gaskets, satisfy different insulation distance demand, without frequently replacing new insulating pad of corresponding specification.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer insulating pads, specifically an insulating pad for dry-type transformers. Background Technology

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, a dry-type transformer is a transformer whose core and windings are not immersed in insulating oil. In the structure of a dry-type transformer, there is an insulating pad between the winding and the lower clamp. The main function of the insulating pad is to maintain a safe insulation distance between the two, realize electrical insulation between the winding and the lower clamp, and bear the weight of the winding.

[0003] When insulating pads are installed in conjunction with dry-type transformers, the height of the insulating pads may need to be changed due to transformer model changes, insulation distance adjustments, or maintenance requirements. Traditional insulating pads are mostly integral structures with fixed heights. In such cases, new insulating pads of the corresponding specifications must be replaced, requiring the stocking of pads of various heights, which increases inventory costs and management difficulty. Therefore, an insulating pad for dry-type transformers is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an insulating pad for dry-type transformers to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an insulating pad for a dry-type transformer, comprising a base plate and a top plate, with a pad assembly between the base plate and the top plate, the pad assembly comprising multiple insulating pads, two positioning blocks symmetrically fixedly connected to the lower surface of the insulating pads and the lower surface of the top plate, two positioning grooves symmetrically formed on the upper surface of the insulating pads and the upper surface of the base plate, the positioning blocks being inserted into the inner sidewalls of the positioning grooves, two elastic buckles symmetrically fixedly connected to the bottom of the outer sidewalls of the top plate and the insulating pads, and two buckle slots symmetrically fixedly connected to the top of the outer sidewalls of the base plate and the insulating pads, the elastic buckles engaging with the buckle slots.

[0006] As a further preferred embodiment of this technical solution: the base plate, the top plate, the insulating pad, and the positioning block are all made of insulating material.

[0007] As a further preferred embodiment of this technical solution, the upper surface of the top plate is provided with a winding positioning groove.

[0008] As a further preferred embodiment of this technical solution: a lower clamping member positioning boss is fixedly connected to the lower surface of the base plate, and the lower clamping member positioning boss is made of insulating material.

[0009] As a further preferred embodiment of this technical solution: the elastic buckle includes an L-shaped elastic plate and a barb, and two L-shaped elastic plates are symmetrically fixedly connected to the bottom of the outer side wall of the top plate and the insulating pad, and a barb is fixedly connected to the bottom of the inner side wall of the L-shaped elastic plate. Both the L-shaped elastic plate and the barb are made of highly elastic insulating material.

[0010] As a further preferred embodiment of this technical solution: two fixing blocks are symmetrically fixedly connected to the top of the outer side wall of the base plate and the insulating gasket. The lower surface of the fixing block is fixedly connected with a snap-fit ​​protrusion. The shape of the lower surface of the snap-fit ​​protrusion matches the shape of the inner side wall of the barb. Both the fixing block and the snap-fit ​​protrusion are made of insulating material.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, when installing insulating pads, the pad assembly is inserted into the base plate using positioning blocks, and the top plate is inserted into the pad assembly using positioning blocks. The assembly of the pad assembly also relies on the positioning blocks for insertion. In the horizontal direction, the insertion of the positioning blocks into the positioning slots restricts the lateral and longitudinal displacement of adjacent components; in the vertical direction, the engagement of the elastic buckles with the buckle slots restricts the vertical separation of adjacent components. This double limiting ensures that the pads do not have relative displacement under the vibration environment of transformer operation. The pad assembly consists of multiple insulating pads, each with the same thickness. By increasing or decreasing the number of insulating pads, the total height can be adjusted in a gradient manner to meet different insulation distance requirements. There is no need to frequently replace the corresponding specifications of new insulating pads, and there is no need to stock multiple specifications of pads, thus reducing inventory costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 This is a bottom view of the structure of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 4 In this utility model Figure 3 Enlarged view of the structure of area A;

[0017] Figure 5 This is a cross-sectional view of the insulating gasket in this utility model;

[0018] Figure 6 This is a cross-sectional view of the bottom plate of this utility model;

[0019] Figure 7 This is a cross-sectional view of the top plate in this utility model.

[0020] In the picture:

[0021] 1. Base plate; 2. Top plate; 3. Gasket assembly; 4. Positioning groove; 5. Positioning block; 6. Elastic buckle; 7. Buckle slot; 8. Winding positioning groove; 9. Lower clamp positioning boss;

[0022] 31. Insulating gaskets;

[0023] 61. L-shaped elastic plate; 62. Barb;

[0024] 71. Fixing block; 72. Snap-fit ​​protrusion. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "equipment" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Please see Figure 1-7This utility model provides a technical solution: an insulating pad for a dry-type transformer, comprising a base plate 1 and a top plate 2, with a pad assembly 3 between the base plate 1 and the top plate 2. The pad assembly 3 includes multiple insulating pads 31. Two positioning blocks 5 are symmetrically fixedly connected to the lower surface of the insulating pads 31 and the lower surface of the top plate 2. Two positioning grooves 4 are symmetrically formed on the upper surface of the insulating pads 31 and the upper surface of the base plate 1. The positioning blocks 5 are inserted into the inner sidewalls of the positioning grooves 4. Two elastic buckles 6 are symmetrically fixedly connected to the bottom of the outer sidewalls of the top plate 2 and the insulating pads 31. Two buckle slots 7 are symmetrically fixedly connected to the top of the outer sidewalls of the base plate 1 and the insulating pads 31. The elastic buckles 6 engage with the buckle slots 7. When installing the insulating pad, the pad can be adjusted using... The positioning block 5 inserts the gasket group 3 onto the base plate 1, and the positioning block 5 also inserts the top plate 2 onto the gasket group 3. The assembly of the gasket group 3 also relies on the positioning block 5 for insertion. In the horizontal direction, the insertion of the positioning block 5 into the positioning groove 4 restricts the left-right and front-back displacement of adjacent components. In the vertical direction, the engagement of the elastic buckle 6 into the buckle groove 7 restricts the vertical separation of adjacent components. The double limit ensures that the gaskets have no relative displacement under the vibration environment of transformer operation. The gasket group 3 is composed of multiple insulating gaskets 31, each with the same thickness. By increasing or decreasing the number of insulating gaskets 31, the total height can be adjusted in a gradient manner to meet different insulation distance requirements. There is no need to frequently replace the corresponding specifications of new insulating gaskets, and there is no need to stock multiple specifications of gaskets, thus reducing inventory costs.

[0028] In this embodiment, specifically: the base plate 1, top plate 2, insulating pad 31, and positioning block 5 are all made of insulating materials; the insulating material can be BMC composite material, which combines mechanical strength, insulation and heat resistance, and is easy to mold, and the cost is relatively controllable.

[0029] In this embodiment, specifically: a winding positioning groove 8 is provided on the upper surface of the top plate 2; the outline of the winding positioning groove 8 matches the bottom protrusion of the winding, which can limit the horizontal displacement of the winding.

[0030] In this embodiment, specifically: a lower clamping member positioning boss 9 is fixedly connected to the lower surface of the base plate 1, and the lower clamping member positioning boss 9 is made of insulating material; the lower clamping member positioning boss 9 is integrally formed with the base plate 1, and is also made of BMC composite material; the lower clamping member positioning boss 9 cooperates with the lower clamping member groove to achieve precise positioning of the base plate 1 and the lower clamping member.

[0031] In this embodiment, specifically: the elastic buckle 6 includes an L-shaped elastic plate 61 and a barb 62. Two L-shaped elastic plates 61 are symmetrically fixedly connected to the bottom of the outer side wall of the top plate 2 and the insulating gasket 31. A barb 62 is fixedly connected to the bottom of the inner side wall of the L-shaped elastic plate 61. Both the L-shaped elastic plate 61 and the barb 62 are made of highly elastic insulating material. The L-shaped elastic plate 61 and the barb 62 can be made of silicone rubber modified epoxy resin. This elastic insulating material has excellent elasticity and fatigue resistance, and can withstand a certain elastic deformation. During installation, the L-shaped elastic plate 61 is pried open outward to facilitate the insertion of the barb 62 into the buckle slot 7. With the barb 62 structure, a vertical locking force can be provided, and it will not loosen under long-term vibration of the dry-type transformer. The silicone rubber modified epoxy resin insulation and temperature resistance are compatible, and it will not age or become brittle in the high-temperature environment of the transformer.

[0032] In this embodiment, specifically: two fixing blocks 71 are symmetrically fixedly connected to the top of the outer side wall of the base plate 1 and the insulating pad 31. The lower surface of the fixing block 71 is fixedly connected to a snap-fit ​​protrusion 72. The shape of the lower surface of the snap-fit ​​protrusion 72 matches the shape of the inner side wall of the barb 62. Both the fixing block 71 and the snap-fit ​​protrusion 72 are made of insulating material. The fixing block 71 and the snap-fit ​​protrusion 72 can be made of epoxy glass cloth reinforced unsaturated polyester resin composite material. This material has good wear resistance, good impact resistance and stress resistance, and no electrical conductivity hazards after long-term snap-fit ​​friction. It has little wear after long-term snap-fit ​​friction and can withstand the long-term extrusion force of the elastic buckle 6 without deformation.

[0033] The working principle of this utility model is as follows: The base plate 1, top plate 2, insulating pads 31, and positioning blocks 5 are all made of BMC composite material. BMC composite material has the advantages of mechanical strength, insulation and heat resistance, and is easy to mold, with relatively controllable cost. The top plate 2 is inserted into the pad assembly 3. The assembly of the pad assembly 3 also relies on the positioning blocks 5 to achieve the insertion. In the horizontal direction, the positioning blocks 5 are inserted into the positioning grooves 4 to restrict the left and right and front and back displacement of adjacent parts. In the vertical direction, the elastic buckles 6 are engaged with the buckle grooves 7, and the barbs 62 are engaged with the engagement protrusions 72 to restrict the vertical separation of adjacent parts. The double limit ensures that the pads have no relative displacement under the vibration environment of transformer operation. The pad assembly 3 is composed of multiple insulating pads 31. The thickness of each pad is the same. By increasing or decreasing the number of insulating pads 31, the total height can be adjusted in a gradient to meet different insulation distance requirements. There is no need to frequently replace the corresponding specifications of new insulating pads, and there is no need to stock multiple specifications of pads, thus reducing inventory costs.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An insulating pad for a dry-type transformer, characterized in that: The device includes a base plate (1) and a top plate (2). A gasket group (3) is provided between the base plate (1) and the top plate (2). The gasket group (3) includes multiple insulating gaskets (31). Two positioning blocks (5) are symmetrically fixedly connected to the lower surface of the insulating gaskets (31) and the lower surface of the top plate (2). Two positioning grooves (4) are symmetrically opened on the upper surface of the insulating gaskets (31) and the upper surface of the base plate (1). The positioning blocks (5) are inserted into the inner sidewall of the positioning grooves (4). Two elastic buckles (6) are symmetrically fixedly connected to the bottom of the outer sidewall of the top plate (2) and the insulating gaskets (31). Two buckle slots (7) are symmetrically fixedly connected to the top of the outer sidewall of the base plate (1) and the insulating gaskets (31). The elastic buckles (6) engage with the buckle slots (7).

2. The insulating pad for a dry-type transformer according to claim 1, characterized in that: The bottom plate (1), the top plate (2), the insulating pad (31), and the positioning block (5) are all made of insulating materials.

3. The insulating pad for a dry-type transformer according to claim 2, characterized in that: The top plate (2) has a winding positioning groove (8) on its upper surface.

4. The insulating pad for a dry-type transformer according to claim 3, characterized in that: The lower surface of the base plate (1) is fixedly connected to a lower clamping positioning boss (9), which is made of insulating material.

5. The insulating pad for a dry-type transformer according to claim 4, characterized in that: The elastic buckle (6) includes an L-shaped elastic plate (61) and a barb (62). The bottom of the outer side wall of the top plate (2) and the insulating pad (31) are symmetrically fixed with two L-shaped elastic plates (61). The bottom of the inner side wall of the L-shaped elastic plate (61) is fixed with a barb (62). Both the L-shaped elastic plate (61) and the barb (62) are made of highly elastic insulating material.

6. The insulating pad for a dry-type transformer according to claim 5, characterized in that: The bottom plate (1) and the outer side wall of the insulating pad (31) are symmetrically fixed with two fixing blocks (71). The lower surface of the fixing block (71) is fixedly connected with a snap-fit ​​protrusion (72). The shape of the lower surface of the snap-fit ​​protrusion (72) matches the shape of the inner side wall of the barb (62). Both the fixing block (71) and the snap-fit ​​protrusion (72) are made of insulating material.

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