A kind of spacer and transformer core auxiliary pressing device
By designing an auxiliary compression device including pads and wire ropes, the problem of easy damage and curling of the transformer core during the compression process is solved, and effective protection of the core and improvement of production efficiency are achieved.
Patent Information
- Application Number
- CN202421367945.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The transformer core is prone to damage and curling during the compression process, resulting in insulation damage, increased vortex current and local overheating, and may even cause fever accidents.
An auxiliary compression device is designed, including a pad and a wire rope. The position of the rope is defined through the guide groove and step structure of the pad, the contact area between the wire rope and the iron core is increased, and the force angle is adjusted by cutting angle to protect the iron core.
It effectively avoids damage and curling of the core during tightening, improves production efficiency, and is suitable for most power transformers in the range of 27kV-750kV.
Smart Images
Figure CN222734786U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of transformer equipment, and in particular relates to an auxiliary pressing device for protecting the transformer core from damage during the production and assembly process of the transformer core. Background Art
[0002] With the deepening of smart grid construction, the demand for transformers has increased, which has prompted the transformer manufacturing industry to develop rapidly in the direction of maturity and high standardization. At present, after the transformer core sheets are stacked, they are generally compressed with steel wire ropes, but the operation is easy to cause the curling and damage of silicon steel sheets, which may cause insulation damage between silicon steel sheets, increase eddy currents and cause local overheating; in severe cases, it may cause the core to catch fire, resulting in a major accident of transformer burning. Summary of the invention
[0003] The utility model provides a cushion block and a transformer core auxiliary pressing device, which can reduce the damage and curling of the transformer core when the transformer core is tightened.
[0004] To achieve the above purpose, the utility model provides a cushion block, including a cushion block body, a guide groove is provided on one side of the cushion block body, a step surface is provided on the side of the cushion block body opposite to the guide groove, and a cut angle is provided on the side of the cushion block body provided with the guide groove.
[0005] Furthermore, the guide groove is a through guide groove.
[0006] Further, the depth of the guide groove is greater than the diameter of the rope.
[0007] Furthermore, both the step surface and the cut corner have chamfers.
[0008] Furthermore, the cushion block is made of PA66 nylon material.
[0009] Furthermore, the roughness of the pad is less than 3.2.
[0010] A transformer core auxiliary pressing device comprises a first pad, a second pad, a third pad and a rope. When the core is pressed: the step of the first pad is clamped at both ends of the largest and second-level core sheets, the step of the second pad is clamped at both ends of the X-level and X+1-level core sheets, and the step of the third pad is clamped at both ends of the Y-level and Y+1-level core sheets. The rope extends into the guide grooves of the first pad, the second pad, and the third pad, and tightens the first pad, the second pad and the third pad, X<Y; the first pad, the second pad, and the third pad are the above-mentioned pads.
[0011] Furthermore, the cutting angles of the first cushion block, the second cushion block and the third cushion block are different.
[0012] Furthermore, the step depths of the first cushion block, the second cushion block and the third cushion block are different.
[0013] Furthermore, the rope is a steel wire rope.
[0014] Compared with the prior art, the utility model has at least the following beneficial technical effects:
[0015] When the auxiliary clamping device provided by the utility model is used, the pad is placed under the rope, the position of the rope is limited by the guide groove on the pad, the contact area between the steel wire rope and the iron core is increased by the corresponding step pad and the iron core is protected. When operating, only the corresponding step pad is placed on the corresponding iron core step, and the rope is placed in the U-shaped guide groove to complete the positioning of the steel wire rope, and the iron core can be tightened. Damage such as breakage and curling of the iron core during the tightening process is avoided, and the production efficiency is improved at the same time.
[0016] Furthermore, the stress angle between the rope and the core is changed by different cutting angles of the spacer, and the contact area between the core and the wire rope is further increased.
[0017] Furthermore, the traditional electrical laminated wood pads are not hard enough and are prone to cracking, while the pads of the utility model use PA66 nylon material, which is not only strong and wear-resistant, but also has good insulation performance and can be reused repeatedly, and the cost is relatively low, and has good practical value.
[0018] The auxiliary clamping device can adapt to the core specifications of most power transformers with voltage levels of 27kV-750kV and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a core auxiliary clamping device structure;
[0020] Figure 2 Schematic diagram of the first cushion block, wherein (a) is a front view of the first cushion block, (b) is a front view of the first cushion block, and (c) is a left view of the first cushion block;
[0021] Figure 3 Schematic diagram of the second cushion block, wherein (a) is a front view of the second cushion block, (b) is a front view of the second cushion block, and (c) is a left view of the second cushion block;
[0022] Figure 4 Schematic diagram of the third cushion block, wherein (a) is a front view of the third cushion block, (b) is a front view of the third cushion block, and (c) is a left view of the third cushion block;
[0023] Figure 5 This is a schematic diagram of the structure of the core auxiliary clamping device.
[0024] In the accompanying drawings: 1. first cushion block, 2. second cushion block, 3. third cushion block, 4. rope, 1-1. first guide groove, 1-2. first step, 1-3. first cutting angle, 2-1. second guide groove, 2-2. second step, 2-3. second cutting angle, 3-1. third guide groove, 3-2. third step, 3-3. third cutting angle, 8. core column, 9. upper iron yoke, 10. lower iron yoke. DETAILED DESCRIPTION
[0025] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.
[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0027] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. used herein indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0029] In view of the possible damage and curling problems that may occur during the stacking process of the core sheets, in order to eliminate potential hidden dangers and improve the efficiency of core assembly and compaction, the utility model provides an auxiliary tooling for the transformer core in the compaction process, which has the advantages of wide application range, good wear resistance, and recyclability, and can effectively improve the production efficiency of the transformer.
[0030] Example 1
[0031] Reference Figure 2 The first cushion block 1 includes a first cushion block body, a 5mm step 1-2 is provided on the front of the first cushion block body, a U-shaped first guide groove 1-1 is provided on the back, the first guide groove 1-1 is used to fix the position of the wire rope, and a 45° first cutting angle 1-3 is provided on it to ensure the contact area between the wire rope and the cushion block.
[0032] The first cushion block 1 is made of PA66 nylon material.
[0033] The roughness of the first pad 1 is less than 3.2.
[0034] Example 2
[0035] Reference Figure 3 The second cushion block 2 includes a cushion block body, a second step 2-2 of 7.5 mm is provided on the front of the cushion block body, a second guide groove 2-1 for fixing the position of the wire rope is provided on the back of the second cushion block 2, the second guide groove 2-1 is a through U-shaped groove, a second cut angle 2-3 of 15° is provided on the back of the second cushion block 2, and the cushion block body is used to increase the contact area between the wire rope and the cushion block. The material and roughness of the second cushion block 2 are the same as those of Example 1.
[0036] Example 3
[0037] Reference Figure 4 The third cushion block 3 includes a third cushion block body, a third step 3-2 of 10 mm is provided on the front of the third cushion block body, a third guide groove 3-1 for limiting the position of the wire rope is provided on the back of the third cushion block 3, the third guide groove 3-1 is a through U-shaped groove, a third cut angle 3-3 of 30° is provided on the back of the third cushion block 3, and the cushion block body is used to increase the contact area between the wire rope and the cushion block. The material and roughness of the third cushion block 3 are the same as those of Example 1.
[0038] Example 4
[0039] like Figure 1 and Figure 5 As shown, a transformer core auxiliary pressing device comprises: a first cushion block 1, a second cushion block 2, a third cushion block 3 and a rope 4. The first cushion block 1, the second cushion block 2 and the third cushion block 3 have different sizes. The three different cushion blocks are symmetrically arranged in the radial direction of the core column and then fastened by the rope 4. The rope 4 is a steel wire rope.
[0040] Among them, the first spacer block 1 is used for the upper and lower halves of the largest level and the second level of the core and the symmetrical parts between the phases, and the first guide groove is used to fix the position of the wire rope; the second spacer block 2 is used for any of the second to sixth levels of the core and the upper and lower halves of the next level and the symmetrical parts between the phases, and the specific level can be determined according to the actual situation, and the second guide groove is used to fix the position of the wire rope; the third spacer block 3 is used for any of the eighth to eleventh levels of the core and the upper and lower halves of the next level and the symmetrical parts between the phases, and the third guide groove is used to fix the position of the wire rope;
[0041] Preferably, the first cushion block 1 , the second cushion block 2 and the third cushion block 3 are made of PA66 nylon material.
[0042] Preferably, the roughness of the first cushion block 1 , the second cushion block 2 and the third cushion block 3 is less than 3.2.
[0043] The use process of this auxiliary clamping device is as follows:
[0044] like Figure 5 As shown, firstly, according to the core diameter specifications, spacers in different step forms are selected and pre-installed on different levels of the core, and pre-tightened with wire ropes. Then, they are reasonably spaced in the axial direction according to the transformer core window height, in order to achieve a better tightening effect.
[0045] The term "consisting of..." describing a combination should include the identified elements, ingredients, components or steps and other elements, ingredients, components or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, components or steps herein also contemplates an embodiment consisting essentially of these elements, ingredients, components or steps.
[0046] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.
[0047] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of the subject matter, nor should it be considered that the applicant has not considered the subject matter as part of the disclosed utility model subject matter.
Claims
1. A cushion block, characterized in that: It comprises a cushion block body, one side of which is provided with a guide groove, the side of the cushion block body opposite to the guide groove is provided with a step surface, the side of the cushion block body provided with the guide groove is provided with a cut corner; the step surface and the cut corner are both chamfered.
2. A cushion block according to claim 1, characterized in that: The guide groove is a through guide groove.
3. A cushion block according to claim 1, characterized in that: The guide groove has a depth greater than the diameter of the rope.
4. A cushion block according to claim 1, characterized in that: The cushion block is made of PA66 nylon material.
5. A cushion block according to claim 1, characterized in that: The roughness of the pad is less than 3.
2.
6. A transformer core auxiliary pressing device, characterized in that: It comprises a first pad (1), a second pad (2), a third pad (3) and a rope (4). When the core is compressed: the step of the first pad (1) is clamped at both ends of the largest and second-level core sheets, the step of the second pad (2) is clamped at both ends of the X-level and X+1-level core sheets, and the step of the third pad (3) is clamped at both ends of the Y-level and Y+1-level core sheets. The rope (4) extends into the guide grooves of the first pad (1), the second pad (2), and the third pad (3), and tightens the first pad (1), the second pad (2), and the third pad (3), X<Y; the first pad (1), the second pad (2), and the third pad (3) are the pads described in claim 1.
7. The transformer core auxiliary pressing device according to claim 6, characterized in that: The first cushion block (1), the second cushion block (2) and the third cushion block (3) have different cutting angles.
8. The transformer core auxiliary pressing device according to claim 6, characterized in that: The step depths of the first cushion block (1), the second cushion block (2) and the third cushion block (3) are different.
9. The transformer core auxiliary pressing device according to claim 6, characterized in that: The rope (4) is a steel wire rope.