Transformer iron core clamping plate structure, fixing device and placing system of transformer iron core clamping plate structure

Abstract

The utility model relates to the technical field of transformers, in particular to a transformer iron core clamping plate structure, a fixing device and a placing system of the transformer iron core clamping plate structure, and the transformer iron core clamping plate structure comprises a first clamping piece and a second clamping piece, the outer surface of at least one side of the second section and the outer surface of at least one side of the first section are located on different planes. A containing space capable of containing a cable is formed at the joint of the second section and the first section, the strength of the first clamping piece is enhanced by arranging the reinforcing ribs, the strength of the second clamping piece is enhanced by arranging the reinforcing ribs, and welding deformation can be reduced through the overall design, so that clamping of an iron core sheet is achieved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer core clamping plate structure, fixing device and its installation system. Background Technology

[0002] Transformers are the main equipment in power transmission and transformation equipment. The iron core in the transformer forms a closed magnetic circuit and is also the skeleton for installing the windings. It is an extremely important component for the electromagnetic performance and mechanical strength of the transformer. The iron core of a dry-type transformer accounts for about 60% of the total weight of the transformer. The clamps must not only bear the weight of the transformer body and safely lift the body or iron core, but also ensure the overall assembly of the transformer, the safe distance between high and low voltage leads, and withstand the vibration and impact of electric forces during operation and short circuits without displacement or deformation. Therefore, the manufacturing of the clamps and their structural components and the assembly of the iron core have a significant impact on the overall quality of the transformer.

[0003] Traditional clamping components typically employ square steel tube structures or web structures welded from steel plates. Square steel tube structures are limited by the available profiles and cannot meet the clamping force requirements of large-capacity transformers. Web structures, in order to enhance the strength of the clamping components and accommodate the installation of accessories on the transformer body (such as lead wire brackets, tap changer brackets, etc.), require reinforcing plates or limb plates of different shapes and sizes in addition to the web that forms the basic cross-section. Such web structure components are more prone to welding deformation, reducing assembly quality and increasing the manufacturing cost of the transformer.

[0004] Based on the aforementioned technical issues, we propose a transformer core clamping plate structure, fixing device, and placement system to achieve uniform force distribution, high mechanical strength, simple manufacturing, cost savings, improved bending resistance of the core clamp, and increased applications of the core clamp. Utility Model Content

[0005] Given that the existing core clamps cannot provide sufficient bending resistance and clamping force, and additional accessories are required for installation, which can easily lead to welding deformation, a transformer core clamp structure is proposed.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a transformer core clamping plate structure, comprising a first clamping member, the first clamping member comprising a first section and a second section connected to each other in its width direction, the outer surface of the second section and at least one side of the first section being located on different planes; the connection between the second section and the first section forms a receiving space capable of accommodating cables.

[0007] As a preferred embodiment of the transformer core clamping plate structure of this utility model, a reinforcing rib is provided in the accommodating space, one side of the reinforcing rib is connected to the first section, and the other side of the reinforcing rib is connected to the second section.

[0008] As a preferred embodiment of the transformer core clamping plate structure of this utility model, the reinforcing rib is provided with a notch.

[0009] As a preferred embodiment of the transformer core clamping plate structure of this utility model, the first clamping member is provided with two lifting holes and two positioning holes in its length direction.

[0010] The beneficial effects of the transformer core clamping plate structure of this utility model are as follows: by bending the first clamping member to divide it into a first section and a second section, the bending resistance of the first clamping member is increased, and reinforcing ribs are set in the accommodating space to reduce welding deformation, enhance strength, and at the same time, realize cable storage.

[0011] In view of the above-mentioned problems in core clamping and assembly, a transformer core fixing device is proposed.

[0012] To solve the above-mentioned technical problems, this utility model also provides the following technical solution: a transformer core fixing device, comprising a transformer core clamping plate structure, and further comprising a second clamping member, the second clamping member comprising a third section and a fourth section that are connected to each other in the width direction, wherein the outer surface of at least one side of the third section and the fourth section is located on different planes; a pull plate, one end of the pull plate being fixedly connected to the second clamping member, and the other end of the pull plate being provided with a positioning post that cooperates with a positioning hole.

[0013] As a preferred embodiment of the transformer core assembly device of this utility model, the outer surface of the third section is provided with reinforcing ribs, and the ends of the reinforcing ribs are connected to the fourth section.

[0014] As a preferred embodiment of the transformer core assembly device of this utility model, the reinforcing rib is provided with an extension plate along the direction away from the third section, and the extension plate is provided with mounting holes.

[0015] As a preferred embodiment of the transformer core assembly device of this utility model, the pull plate is provided with a through hole, and the pull plate is bound with a binding strap on the outside.

[0016] In a preferred embodiment of the transformer core assembly device of this utility model, the first clamp and the second clamp are symmetrically arranged on both sides of the core, and a connecting plate is provided between the first clamp on both sides and the second clamp on both sides.

[0017] The two upper clamps and two lower clamps are connected together by side beams. The strength of the upper and lower clamps is enhanced by the first and second reinforcing members, respectively. This reduces welding deformation during the manufacturing of the upper and lower clamps, ensures the clamping force and mechanical strength of the upper and lower yokes of the transformer, and also ensures the lifting of the transformer body and the axial force of the coils. This reduces the no-load loss of the transformer, ensures the safe and reliable operation of the transformer, and saves manufacturing costs.

[0018] The beneficial effects of the transformer core fixing device of this utility model are as follows: the first clamp and the second clamp are positioned and installed by the pull plate, and then tied tightly by the binding strap. The first clamp and the second clamp on both sides are further welded and fixed by the connecting plate. With the setting of reinforcing ribs and reinforcing bars, the strength of the first clamp and the second clamp is increased, the welding deformation during the manufacturing of the clamp is reduced, the clamping force and mechanical strength of the upper and lower yokes of the transformer are guaranteed, the lifting of the transformer body and the axial force of the coil are guaranteed, the no-load loss of the transformer is reduced, the safe and reliable operation of the transformer is guaranteed, and the manufacturing cost is saved.

[0019] In view of the above-mentioned problems in the installation and placement of the transformer core, a transformer core placement system is proposed.

[0020] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a transformer core placement system, which includes a transformer core clamping plate structure, and further includes a base provided below the second clamping member, and an insulating layer provided above the base, on the inner side of the first clamping member and on the inner side of the second clamping member.

[0021] The beneficial effects of the transformer core placement system of this utility model are: a base is set below the core for support, and the installation of an insulation layer ensures the safe operation and long-term reliability of the transformer. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first side view of the first clamping connection structure in this utility model.

[0024] Figure 2 This is a second side view of the first clamping connection structure in this utility model.

[0025] Figure 3This is a third side view of the first clamp connection structure in this utility model.

[0026] Figure 4 This is a fourth side view of the first clamping connection structure in this utility model.

[0027] Figure 5 This is a schematic diagram of the reinforcing rib connection structure in this utility model.

[0028] Figure 6 This is a schematic diagram of the first segment connection structure in this utility model.

[0029] Figure 7 This is a schematic diagram of the second clamp connection structure in this utility model.

[0030] Figure 8 This is a schematic diagram of the pull plate connection structure in this utility model.

[0031] Figure 9 This is a schematic diagram of the overall assembly structure of the transformer in this utility model.

[0032] Figure 10 This is a front view schematic diagram of the transformer core assembly and connection structure in this utility model.

[0033] Figure 11 This is a top view of the transformer core assembly and connection structure in this utility model. Detailed Implementation

[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0037] Example 1

[0038] Reference Figures 1-4This is the first embodiment of the present invention. This embodiment provides a transformer core clamping plate structure, which includes a first clamping member 100. The first clamping member 100 includes a first section 101 and a second section 102 that are connected to each other in the width direction. The outer surface of the second section 102 and at least one side of the first section 101 are located on different planes. The connection between the second section 102 and the first section 101 forms a receiving space K that can accommodate cables.

[0039] The first clamp 100 is made of high-quality steel plate. By directly drilling threaded holes on it and adding a sufficient number and strength of counter-pressure nails, the transformer body assembly and coil clamping are ensured to withstand sufficient pressure.

[0040] The first clamp 100 includes length, width and thickness directions, and in its width direction, that is, in its narrowness direction, it is divided into a first segment 101 and a second segment 102.

[0041] like Figures 1-4 As shown, by bending, the first clamp 100 is divided into a first section 101 and a second section 102 to increase its bending resistance. It is necessary to ensure that at least one side of the outer wall of the first section 101 and the second section 102 is on a different plane, that is, the first section 101 and the second section 102 do not completely overlap, and a receiving space K is formed between the first section 101 and the second section 102.

[0042] The inclusion space K facilitates wiring and cable management for staff. In detail, the transformer uses a temperature control tube installed at a certain position in the low-voltage coil, and then a PT00 temperature control probe is inserted. After the transformer is powered on, the temperature controller can display the temperature of the three-phase windings in a cycle and perform over-temperature alarm and over-temperature trip. The PT00 wiring of these three phases needs to be fixed in a cable tray, and then the control cables can be laid through the inclusion space K.

[0043] In summary, by setting the first clamp 100 symmetrically located on both sides of the iron core slightly above it, the iron core is further clamped from both sides. By bending the first clamp 100 into the first section 101 and the second section 102, the bending resistance of the first clamp 100 is increased to a certain extent, and the function of cable management is provided.

[0044] Example 2

[0045] Reference Figures 1-6 , Figure 9 and Figure 10 This is the second embodiment of the present utility model. This embodiment is based on the previous embodiment, but the difference is that a reinforcing rib 103 is provided in the accommodating space K. One side of the reinforcing rib 103 is connected to the first section 101, and the other side of the reinforcing rib 103 is connected to the second section 102.

[0046] Preferably, the reinforcing rib 103 is provided with a notch 103a.

[0047] Preferably, the first clamp 100 is provided with two lifting holes 104 and two positioning holes 105 in its length direction.

[0048] like Figure 9 and Figure 10 As shown, Q is the iron core, and Q-1 is the iron core air passage. The main stage of the large-capacity iron core has an air passage of a certain thickness (such as a 20*20 aluminum alloy tube or epoxy board, which is beneficial to the heat dissipation of the iron core temperature).

[0049] In the first section 101, a notch 101a may be provided along its length to facilitate the flow of air and heat.

[0050] It should be further noted that this embodiment preferably uses Figure 5 The design preferably includes six reinforcing ribs 103 within the accommodating space K, such as... Figure 9 As shown at the top, the first section 101 and the second section 102 are connected by the reinforcing rib 103, which further enhances the rigidity of the first clamp 100, saves manufacturing costs, and strengthens the support of the first section 101, thereby improving the deformation of the weld to a certain extent.

[0051] The notch 103a is set as follows Figure 5 As shown, the opening is preferably facing upwards. Based on the accommodating space K, the notch 103a can be set to facilitate the cable management work of the staff. When wiring, the cable can be inserted into the notch 103a, so that the overall connection is clearer and less messy, which is convenient for subsequent maintenance.

[0052] Preferably, the notch 103a facilitates the arrangement and fixing of the temperature control sensor wire and the wire groove.

[0053] The main functions of the temperature controller are to set the fan start, over-temperature alarm, over-temperature trip, fault alarm, etc.

[0054] The lifting hole 104 facilitates the overall lifting of the transformer and the lifting of the transformer body after the coils are assembled.

[0055] In summary, by setting reinforcing ribs 103 in the accommodating space K, the rigidity of the first clamp 100 is increased, which can resist pressure and prevent deformation to a certain extent. In addition, the notch 103a is set to further facilitate the cable handling work of the staff, and the lifting hole 104 is set to facilitate the subsequent lifting and transportation of the transformer.

[0056] Example 3

[0057] Reference Figures 1-10This is the third embodiment of the present invention. This embodiment proposes a transformer core fixing device, a second clamp 200, which includes a third section 201 and a fourth section 202 connected to each other in its width direction. The outer surfaces of at least one side of the third section 201 and the fourth section 202 are located on different planes; a pull plate 300, one end of which is fixedly connected to the second clamp 200, and the other end of the pull plate 300 is provided with a positioning post 301 that cooperates with the positioning hole 105.

[0058] The second clamp 200 adopts a double-bending structure design and is made of high-quality steel plate to form an I-beam shape.

[0059] It should be further explained that by directly drilling threaded holes on the first clamping member 100, such as... Figure 11 As shown, the arrangement of threaded holes can be seen from the top view of the first clamp 100, which allows for the direct installation of pressure bolts, thereby ensuring the tightness of the entire assembly and the quality of the transformer assembly.

[0060] The detachable assembly of the positioning hole 105 and positioning post 301 on the pull plate 300 improves the coil assembly margin and ensures assembly quality. The second clamp 200 is welded and fixed to the pull plate 300, while the positioning post 301 is set on the first clamp 100 and movably engages with the positioning hole 105, thereby assembling them to form a new assembly method. This increases the assembly margin of the low-voltage coil and the iron core and saves product costs.

[0061] Preferably, the fourth section 202 is symmetrically arranged on the upper and lower sides of the third section 201, and a plurality of slots 202a are arrayed on the upper side of the fourth section 202.

[0062] like Figure 10 As shown, three grooves 202a are preferably provided and are arranged between two adjacent reinforcing ribs 203. When welding the reinforcing ribs 203, the design of the grooves 202a facilitates the dissipation of heat during welding and provides space for the welding material to flow and fill. It can also adapt to thermal expansion to a certain extent.

[0063] Preferably, a reinforcing rib 203 is provided on the outer surface of the third section 201, and the end of the reinforcing rib 203 is connected to the fourth section 202.

[0064] Six reinforcing ribs 203 are preferably welded together, serving as supports and reinforcing ribs for the second clamp 200.

[0065] Preferably, the reinforcing rib 203 is provided with an extension plate 203a along the direction away from the third section 201, and the extension plate 203a is provided with a mounting hole 203a-1.

[0066] Preferably, the length of the extension plate 203a is greater than the length of the fourth section 202, and it can be used as a support plate for mounting the fan P, such as... Figure 9 As shown, P is the fan, which can be assembled and connected through mounting hole 203a-1.

[0067] Preferably, the pull plate 300 is provided with a through hole 302, and the pull plate 300 is bound with a binding strap 303.

[0068] like Figure 8 As shown, the pull plate 300 is made of low magnetic steel plate and plays the role of tightening the high and low pressure upper and lower clamps. The pull plate 300 has a through hole 302 in the center, which can reduce eddy current loss when the iron core is energized.

[0069] The entire iron core column can be secured using cable ties 303.

[0070] Preferably, the first clamp 100 and the second clamp 200 are symmetrically arranged on both sides of the iron core, and a connecting plate 400 is provided between the first clamp 100 on both sides and the second clamp 200 on both sides.

[0071] The connecting plate 400 connects the high and low voltage upper and lower clamps together, and tightens the clamps on both sides along the outside of the yoke, ensuring the verticality of the core and enabling the winding to receive reliable support evenly. In other words, the connecting plate 400 is connected to the first clamp 100 and the second clamp 200 respectively by screws, which reduces welding deformation during the overall clamp manufacturing process, ensures the clamping force and mechanical strength of the upper and lower yokes of the transformer, reduces the no-load loss of the transformer, and also ensures the lifting of the transformer body and the axial force of the coil.

[0072] Additionally, four threaded holes can be arranged on the connecting plate 400, which can also be used to install and fix the transformer nameplate.

[0073] In summary, by setting the first section 101 and the second section 102, and welding reinforcing ribs 103 therein, the bending design reduces welding deformation, increases strength, and facilitates wiring. Furthermore, the second clamp 200 is reinforced with reinforcing ribs 203 and extension plates 203a.

[0074] Example 4

[0075] Reference Figures 1 to 11 This is the fourth embodiment of the present utility model. This embodiment provides a transformer core placement system, which includes a base 500 provided below the second clamp 200, and an insulating layer 600 provided above the base 500, on the inner side of the first clamp 100, and on the inner side of the second clamp 200.

[0076] Before assembling the transformer, the high and low voltage upper clamps must be removed, then the high and low voltage coils must be installed, the upper iron yoke silicon steel sheets must be inserted, and the high and low voltage upper clamps must be reassembled.

[0077] The insulation layer 600 is set as follows Figure 9 and Figure 11 As shown, this is to ensure the safe and reliable operation of the transformer.

[0078] In summary, by setting up the pull plate 300, which is installed and matched with the first clamp 100 and the second clamp 200 respectively, and then fixed by the binding strap 303, the assembly of the iron core is completed.

[0079] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0080] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0081] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0082] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A transformer core clamping plate structure, characterized in that: include, A first clamp (100) includes a first section (101) and a second section (102) connected to each other in its width direction. The outer surface of the second section (102) and at least one side of the first section (101) are located on different planes. The connection between the second section (102) and the first section (101) forms a receiving space (K) that can accommodate a cable.

2. The transformer core clamping plate structure as described in claim 1, characterized in that: A reinforcing rib (103) is provided in the accommodating space (K), one side of the reinforcing rib (103) is connected to the first section (101), and the other side of the reinforcing rib (103) is connected to the second section (102).

3. The transformer core clamping plate structure as described in claim 2, characterized in that: The reinforcing rib (103) has a notch (103a).

4. The transformer core clamping plate structure as described in any one of claims 1 to 3, characterized in that: The first clamp (100) is provided with two lifting holes (104) and two positioning holes (105) in its length direction.

5. A transformer core fixing device, characterized in that: Including the transformer core clamping structure as described in any one of claims 1 to 4, further comprising: The second clamp (200) includes a third section (201) and a fourth section (202) that are connected to each other in the width direction, wherein the outer surfaces of at least one side of the third section (201) and the fourth section (202) are located in different planes; A pull plate (300) is provided at one end, which is fixedly connected to the second clamp (200), and the other end of the pull plate (300) is provided with a positioning post (301) that cooperates with the positioning hole (105).

6. The transformer core fixing device as described in claim 5, characterized in that: The outer surface of the third section (201) is provided with a reinforcing rib (203), and the end of the reinforcing rib (203) is connected to the fourth section (202).

7. The transformer core fixing device as described in claim 6, characterized in that: The reinforcing rib (203) has an extension plate (203a) along the direction away from the third section (201), and the extension plate (203a) has a mounting hole (203a-1).

8. The transformer core fixing device as described in claim 7, characterized in that: The pull plate (300) is provided with a through hole (302), and the pull plate (300) is bound with a binding strap (303) on the outside.

9. The transformer core fixing device as described in any one of claims 5 to 8, characterized in that: The first clamp (100) and the second clamp (200) are symmetrically arranged on both sides of the iron core, and a connecting plate (400) is provided between the first clamp (100) on both sides and the second clamp (200) on both sides.

10. A transformer core mounting system, characterized in that: Including the transformer core fixing device as described in any one of claims 5 to 9, further comprising: The second clamp (200) is provided with a base (500) below it, and an insulating layer (600) is provided on the top of the base (500), the inner side of the first clamp (100) and the inner side of the second clamp (200).

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