Insulation cushion block structure of dry-type transformer
By designing a dry transformer insulated pad structure with adjustable thickness and deformation space, the existing insulated pad size fixation and easy deformation are solved, and the scope of application and assembly efficiency are improved.
Patent Information
- Application Number
- CN202421652165.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The insulating pads of existing dry transformers are fixed in size, and the thickness cannot be adjusted according to actual conditions. The solid structure is prone to deformation or damage when withstanding the weight of high and low voltage windings, resulting in low assembly efficiency.
An insulating pad structure including a bottom frame, a top plate and an adjustment frame is designed. Through the sliding of the adjustment frame and the extrusion of the rubber cylinder, the thickness adjustment of the insulating pad and the increase in deformation space are achieved to avoid external deformation and damage.
It realizes flexible adjustment of the thickness of the insulating pad, adapts to the specifications of various types of dry transformer models, improves the scope of application and assembly efficiency of the insulating pad, and avoids assembly inconvenience caused by deformation or damage.
Smart Images
Figure CN223006645U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dry-type transformer manufacturing, in particular to an insulating pad structure for a dry-type transformer. Background Technique
[0002] Dry-type transformers are increasingly widely used. In actual production, due to different voltage levels of dry-type transformers, the diameters of the high- and low-voltage coils produced are different, resulting in different main channel distances between the high- and low-voltage coils, and also different thicknesses of the insulating cylinders between the high- and low-voltage coils. To ensure the insulation and safety of dry-type transformers during their cooperation with other electrical equipment, insulating pads are often used to position and fix the high- and low-voltage windings.
[0003] However, there are a large number of dry-type transformer models and specifications, and the sizes of the produced high- and low-voltage windings are different, and the shape and size of the required insulating pads are also different, which leads to a large number of special molds for manufacturing insulating pads, not only increasing the manufacturing cost but also prolonging the production cycle.
[0004] However, the size of the insulating pad of the dry-type transformer at the present stage is fixed and cannot adjust its own thickness according to the actual situation. Also, since the insulating pad of the dry-type transformer is solid, when it bears the weight of the high- and low-voltage windings, it will deform outward as a whole. If there are air bubbles inside during its manufacturing, the insulating pad will be damaged. In this way, it is necessary to disassemble and reinstall the high- and low-voltage windings just after installation, resulting in low assembly efficiency of the transformer. Therefore, an insulating pad structure for a dry-type transformer is proposed. Summary of the Utility Model
[0005] Based on this, the purpose of the present utility model is to provide an insulating pad structure for a dry-type transformer to solve the technical problems raised in the above background.
[0006] To achieve the above purpose, the present utility model provides the following technical solution: An insulating pad structure for a dry-type transformer, including a bottom frame, a top plate is provided above the bottom frame, an inner frame is fixed at the bottom end of the top plate, an adjustment frame is movably sleeved at a position near the bottom end of the outer wall of the inner frame, an outer frame extending into the top end of the bottom frame is fixed at the bottom end of the adjustment frame, a buffer cavity is formed between the outer frame and the inner frame, two groups of rubber cylinders are assembled in the buffer cavity, a multi-sided convex rubber is fixed at the top end of the adjustment frame, and the top end of the multi-sided convex rubber is in contact with the bottom end of the bottom frame;
[0007] Constraint grooves are opened at the edge positions near the front and rear surfaces of the top end of the bottom frame, stepped plates are fixed near the inner walls on both sides of the constraint grooves, and four groups of positioning plates extending into the constraint grooves are slidably arranged at the bottom end of the adjustment frame.
[0008] As a preferred technical solution of the insulating spacer structure of the dry-type transformer of the present utility model, multiple groups of elastic rubber rings are fixed in each rubber cylinder, and the elastic rubber rings are arranged in an elliptical shape.
[0009] As a preferred technical solution of the insulating spacer structure of the dry-type transformer of the present utility model, bolt holes for fixing the clamping members are opened at the top end of the top plate.
[0010] As a preferred technical solution of the insulating spacer structure of the dry-type transformer of the present utility model, the four positioning plates are divided into two groups and are respectively located in each constraint groove, and the top end of each constraint groove is slidably arranged with the bottom of the adjustment frame through a dovetail block and a dovetail groove.
[0011] As a preferred technical solution of the insulating spacer structure of the dry-type transformer of the present utility model, a second ventilation groove is transversely opened at the bottom end of the bottom frame, a first ventilation groove is longitudinally opened at the bottom end of the second ventilation groove, and the first ventilation groove and the second ventilation groove form a cross-shaped groove at the bottom of the bottom frame.
[0012] As a preferred technical solution of the insulating spacer structure of the dry-type transformer of the present utility model, a matching accommodation groove is opened at the contact position between the top of the bottom frame and the outer frame, a first constraint block extending into the accommodation groove is arranged on the left and right outer walls of the outer frame, and a first longitudinal groove for the first constraint block to slide is opened on the inner wall of the accommodation groove.
[0013] As a preferred technical solution of the insulating spacer structure of the dry-type transformer of the present utility model, the outer frame is sleeved on the outer wall of the inner frame, second constraint blocks extending into the inner wall of the outer frame are arranged on the left and right outer walls of the inner frame, and a second longitudinal groove for the second constraint block to slide is longitudinally opened on the inner wall of the outer frame.
[0014] In summary, the present utility model mainly has the following beneficial effects:
[0015] The insulating spacer of the present utility model is composed of a bottom frame, a top plate and an adjustment frame, so that when bearing the weight of the high-voltage and low-voltage windings, it can be compressed downward, enabling a certain deformation space inside, thereby preventing damage caused by external shape deformation. The adjustment frame can be adjusted upward synchronously with the top frame, thereby changing the overall thickness of the insulating spacer, so as to meet the model specifications of various types of dry-type transformers, and further improving the application range of the insulating spacer. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a three-dimensional view of the present utility model;
[0017] Figure 2 is a three-dimensional sectional view of the present utility model;
[0018] Figure 3 is a front view sectional plan view of the present utility model;
[0019] Figure 4 This is the upward view structure of the present utility model;
[0020] Figure 5 This is the sectional plan view of the bottom frame and the positioning plate of the present utility model.
[0021] In the figure: 100, bottom frame;
[0022] 110, top plate; 111, inner frame; 120, adjustment frame; 121, multi-sided convex rubber; 122, outer frame; 130, rubber cylinder; 140, first ventilation groove; 150, second ventilation groove; 160, constraint groove; 170, stepped plate; 180, positioning plate. Specific embodiments
[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.
[0024] Next, the embodiments of the present utility model will be described according to the overall structure of the present utility model.
[0025] A dry-type transformer insulating spacer structure, as Figures 1 to 5 shown, includes a bottom frame 100, a top plate 110 is provided above the bottom frame 100, an inner frame 111 is fixed to the bottom end of the top plate 110, an adjustment frame 120 is movably sleeved at a position near the bottom end of the outer wall of the inner frame 111, an outer frame 122 extending into the top end of the bottom frame 100 is fixed to the bottom end of the adjustment frame 120, a buffer cavity is formed between the outer frame 122 and the inner frame 111, two groups of rubber cylinders 130 are assembled in the buffer cavity, a multi-sided convex rubber 121 is fixed to the top end of the adjustment frame 120, and the top end of the multi-sided convex rubber 121 is in contact with the bottom end of the bottom frame 100;
[0026] Constraint grooves 160 are opened at positions near the edges of the front and rear surfaces of the top end of the bottom frame 100, stepped plates 170 are fixed to the inner walls near both sides of the constraint grooves 160, four groups of positioning plates 180 extending into the constraint grooves 160 are slidably provided at the bottom end of the adjustment frame 120, multiple elastic rubber rings are fixed in each group of rubber cylinders 130, and the elastic rubber rings are arranged in an elliptical shape;
[0027] A second ventilation groove 150 is transversely opened at the bottom end of the bottom frame 100, a first ventilation groove 140 is longitudinally opened at the bottom end of the second ventilation groove 150, and the first ventilation groove 140 and the second ventilation groove 150 form a cross-shaped groove at the bottom of the bottom frame 100.
[0028] This overall structure is injection-molded with insulating rubber material, which can prevent the flow of electricity between the high-voltage and low-voltage windings;
[0029] First, place the rubber insulating block on the insulation between the high-voltage and low-voltage windings. The first ventilation groove 140 opened at the bottom end of the bottom frame 100 is sleeved on the insulating board. Together with the second ventilation groove 150, it can ensure normal ventilation at the contact position between the insulating block and the high-voltage and low-voltage windings, and improve the heat dissipation efficiency of the high-voltage and low-voltage windings.
[0030] When it bears the weight of the high-voltage and low-voltage windings, the top plate 110 can move downward, causing the inner frame 111 to slide downward along the inner wall of the outer frame 122. The bottom end of the top plate 110 squeezes the polygonal convex rubber 121, which gradually tends to a shriveled state. At the same time, the rubber cylinder 130 between the inner frame 111 and the outer frame 122 is also squeezed. At this time, the rubber cylinder 130 and multiple groups of elastic rubber rings on the inner wall bend and deform to cope, ensuring that there is enough deformation space in the insulating block, avoiding damage caused by overall deformation or tilting of the high-voltage and low-voltage windings, and providing a better supporting effect on the high-voltage and low-voltage windings.
[0031] When the thickness of the insulating block cannot meet the requirements of the high-voltage and low-voltage windings at this time, the positioning plates 180 can be slid in two directions to make them contact the two sets of stepped plates 170 in the constraint grooves 160 respectively. Thus, the adjustment frame 120 drives the outer frame 122 and the top plate 110 to rise, changing the overall thickness of the insulating block to meet the specifications of the high and low windings. The steps of the stepped plate 170 have multiple heights, making the applicable range of the insulating block wider.
[0032] Please refer particularly to Figure 1 and Figure 2 , bolt holes for fixing the clamping parts are opened at the top end of the top plate 110.
[0033] Please refer particularly to Figure 5 , the four positioning plates 180 are divided into two groups and are respectively located in each group of constraint grooves 160. The top ends of each group of constraint grooves 160 are slidably arranged with the bottom of the adjustment frame 120 through dovetail blocks and dovetail grooves.
[0034] Using the dovetail blocks and dovetail grooves to ensure that part of the positioning plate 180 is separated from the adjustment frame 120, making the alignment and thickness adjustment convenient and efficient.
[0035] Please refer particularly to Figure 3 , a matching receiving groove is opened at the contact position between the top of the bottom frame 100 and the outer frame 122. The left and right outer walls of the outer frame 122 are provided with first constraint blocks extending into the receiving groove, and the inner wall of the receiving groove is provided with first longitudinal grooves for the first constraint blocks to slide.
[0036] The outer frame 122 is sleeved on the outer wall of the inner frame 111. The left and right outer walls of the inner frame 111 are provided with second constraint blocks extending into the inner wall of the outer frame 122, and the inner wall of the outer frame 122 is longitudinally provided with second longitudinal grooves for the second constraint blocks to slide.
[0037] The first constraint block and the first longitudinal groove cooperate with each other to ensure that the outer frame will not be separated from the bottom frame, while the second constraint block and the second longitudinal groove prevent the outer frame 122 and the inner frame 111 from separating, ensuring that the insulating block is an integral whole and will not disperse during carrying, thus improving the efficiency of assembling the dry-type transformer.
[0038] During use, first place the rubber insulating block on the insulation between the high-voltage and low-voltage windings. The first ventilation groove 140 opened at the bottom end of the bottom frame 100 is sleeved on the insulation board. Cooperating with the second ventilation groove 150 can ensure normal ventilation at the contact position between the insulating block and the high-voltage and low-voltage windings, and can improve the heat dissipation efficiency of the high-voltage and low-voltage windings.
[0039] When it bears the weight of the high-voltage and low-voltage windings, the top plate 110 can move downward to make the inner frame 111 slide downward along the inner wall of the outer frame 122. The bottom end of the top plate 110 squeezes the polygonal convex rubber 121 and gradually tends to a shriveled state. At the same time, the rubber cylinder 130 between the inner frame 111 and the outer frame 122 is also squeezed. At this time, the rubber cylinder 130 and multiple groups of elastic rubber rings on the inner wall bend and deform to cope, ensuring that there is enough deformation space in the insulating block, avoiding damage caused by overall deformation or tilting of the high-voltage and low-voltage windings, and can provide a better supporting effect on the high-voltage and low-voltage windings.
[0040] When the thickness of the insulating block cannot meet the requirements of the high-voltage and low-voltage windings at this time, the positioning plate 180 can be slid in two directions to make it contact with two sets of stepped plates 170 in the constraint groove 160 respectively, so that the adjustment frame 120 drives the outer frame 122 and the top plate 110 to rise, changing the overall thickness of the insulating block to meet the specifications of the high-voltage and low-voltage windings. The steps of the stepped plate 170 have multiple heights, so that the applicable range of the insulating block is wider. The parts not involved in this device are the same as or can be implemented by using the prior art.
[0041] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.
Claims
1. A dry-type transformer insulating spacer structure, comprising a bottom frame (100), characterized in that: A top plate (110) is provided above the bottom frame (100); an inner frame (111) is fixed to the bottom end of the top plate (110); an adjustment frame (120) is movably sleeved on the outer wall of the inner frame (111) near the bottom end; an outer frame (122) extending into the top end of the bottom frame (100) is fixed to the bottom end of the adjustment frame (120); a buffer cavity is formed between the outer frame (122) and the inner frame (111); two groups of rubber tubes (130) are installed in the buffer cavity; a multi-sided raised rubber (121) is fixed to the top end of the adjustment frame (120); and the top end of the multi-sided raised rubber (121) is in contact with the bottom end of the bottom frame (100); A restraining groove (160) is provided at the top of the bottom frame (100) near the edge of the front and rear surfaces, and a step plate (170) is fixed near the inner walls on both sides of the restraining groove (160). Four groups of positioning plates (180) extending into the restraining groove (160) are slidably provided at the bottom end of the adjustment frame (120).
2. The dry-type transformer insulating spacer structure according to claim 1, characterized in that: A plurality of groups of elastic rubber rings are fixed inside each group of the rubber tubes (130), and the elastic rubber rings are arranged in an elliptical shape.
3. The insulating spacer structure of a dry-type transformer according to claim 1, characterized in that: The top end of the top plate (110) is provided with a bolt hole for fixing the clamp.
4. The dry-type transformer insulating spacer structure according to claim 1, characterized in that: The four groups of positioning plates (180) are respectively located in each group of constraint grooves (160) in pairs, and the top of each group of constraint grooves (160) is slidably arranged with the bottom of the adjustment frame (120) through a dovetail block and a dovetail groove.
5. The insulating spacer structure of a dry-type transformer according to claim 1, characterized in that: A second ventilation slot (150) is transversely opened at the bottom end of the bottom frame (100), a first ventilation slot (140) is longitudinally opened at the bottom end of the second ventilation slot (150), and the first ventilation slot (140) and the second ventilation slot (150) form a cross-shaped slot at the bottom of the bottom frame (100).
6. The insulating spacer structure of a dry-type transformer according to claim 1, characterized in that: A matching receiving groove is provided at the contact position between the top of the bottom frame (100) and the outer frame (122); the left and right outer walls of the outer frame (122) are provided with a first restraining block extending into the receiving groove; and the inner wall of the receiving groove is provided with a first longitudinal groove for the first restraining block to slide.
7. The dry-type transformer insulating spacer structure according to claim 1, characterized in that: The outer frame (122) is sleeved on the outer wall of the inner frame (111); the left and right outer walls of the inner frame (111) are provided with second restraining blocks extending into the inner wall of the outer frame (122); and the inner wall of the outer frame (122) is longitudinally provided with a second longitudinal groove for sliding of the second restraining block.