Adjustable coil pouring mold and transformer pouring method

Abstract

The invention provides an adjustable coil pouring mold and a transformer pouring method.The adjustable coil pouring mold comprises a base plate, an end cover, an inner mold, an outer mold and a wiring panel, the base plate is connected with one end of the inner mold and one end of the outer mold, the other end of the inner mold and the other end of the outer mold are connected with the end cover, and the inner mold is sleeved with the outer mold; the coil forming die further comprises adjustable inserting plate structures, the symmetrical adjustable inserting plate structures are arranged on the two sides of the outer die, each adjustable inserting plate structure comprises an inserting plate, a clamping plate, a spring mechanism, a positioning bolt and a positioning nut, the inserting plates are installed between the base plate and the end cover, the inserting plates can slide along the base plate and the end cover, and the inserting plates slide to different positions according to the sizes of different coils. The inserting plate abuts against the outer surface of the outer mold, the spring mechanism limits the inserting plate to only slide outwards in the direction away from the outer mold, and the positioning bolt and the positioning nut position the inserting plate. The outer mold is supported by arranging the inserting plate, the coil is prevented from having a big belly in the pouring process, the position of the inserting plate is adjustable, the mold is suitable for pouring coils of different sizes, and universality is enhanced.

Description

Technical Field

[0001] The present application relates to the field of transformer molds, and in particular to an adjustable coil casting mold and a transformer casting method. Background Art

[0002] Transformers are the main power distribution equipment in the power system. The high and low voltage coils of 35KV box-type transformers are cast with insulating resin. In production, after the coil wire is wound, it needs to be put into the mold for resin pouring and filling. After cooling and shaping and demolding, the finished coil is obtained.

[0003] At present, conventional coil molds are mainly divided into the following five parts: chassis, end cover, inner mold, outer mold, and wiring panel. In actual production, the outer mold is a soft mold made of 1.5mm steel. During the pouring process, the high-temperature insulating resin mixture is pressurized and filled into the gap in the coil mold from the feed port in liquid form. Due to the effects of gravity and pressure, the liquid resin will generate expansion force to the surrounding outer mold. Since the upper and lower ends of the outer mold are fixed and the abdomen is not supported, it is easy to cause the coil to have a "big belly", which greatly affects the appearance. This is a "common problem" of all dry casting coils.

[0004] At present, some molds that prevent deformation of the outer mold and the inner mold require clamping plates to be set on the outer mold and the inner mold body. The outer mold and the inner mold for coils of different sizes need to be provided with clamping plates on different outer molds and inner molds. However, the outer mold and the inner mold themselves are relatively soft, making it difficult to set the clamping plates on the mold body itself. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide an adjustable coil casting mold, the mold has a plug plate to support the outer mold during the casting process, and the position of the plug plate can be adjusted to cast coils of different sizes, thereby enhancing the versatility of the mold.

[0006] In the first aspect, an embodiment of the present application provides an adjustable coil casting mold, including: a chassis, an end cover, an inner mold, an outer mold and a wiring panel, the chassis is connected to one end of the inner mold and the outer mold, the other end of the inner mold and the outer mold is connected to the end cover, the inner mold and the outer mold are coaxially arranged, and the outer mold is sleeved outside the inner mold; it also includes an adjustable plug plate structure, and symmetrical adjustable plug plate structures are arranged on both sides of the outer mold. The adjustable plug plate structure includes a plug plate, a clamping plate, a spring mechanism, a positioning bolt and a positioning nut. The plug plate is installed between the chassis and the end cover, and the plug plate can slide along the chassis and the end cover. The spring mechanism limits the plug plate to slide only in a direction outward away from the outer mold. The plug plate slides to different target positions according to the size of the coil. After the plug plate slides to the target position, the spring mechanism, the positioning bolt and the positioning nut position the plug plate, and the plug plate supports the outer mold.

[0007] The spring mechanism comprises a fixing plate and a plurality of spring triggers, wherein the plurality of spring triggers are fixed on the fixing plate in parallel in a direction away from the outer mold, and the fixing plate is fixed on the upper surface of the chassis and the upper surface of the end cover.

[0008] The spring trigger includes a trigger, a compression spring and a round nail. The trigger is hinged to a fixed plate through the round nail. The trigger includes a limiting part, a connecting part and a rotating part. The limiting part extends and protrudes from the fixed plate. The connecting part is fixedly connected to one end of the compression spring. A round nail hole is provided at the connection between the rotating part and the connecting part. A hole is provided on the fixed plate. The round nail is inserted into the round nail hole and the hole. The other end of the compression spring is fixed on the fixed plate.

[0009] A plurality of spring triggers are fixed on both sides of the plug plate, and the two sides of the plug plate are respectively inserted between two adjacent limiting parts.

[0010] The inserting plate comprises a flat plate and reinforcing ribs, wherein the reinforcing ribs are arranged on a side of the flat plate away from the outer mold, and the lower end of the reinforcing ribs is provided with a protruding portion protruding from the flat plate.

[0011] A chassis groove is provided on the chassis, and the protruding portion of the reinforcing rib is inserted into the chassis groove.

[0012] An end cover groove is provided on the end cover, and the plug plate is inserted in the end cover groove.

[0013] A clamping plate is arranged between the chassis and the end cover, and the clamping plate is arranged at the outermost sides of the chassis and the end cover. Bolt holes are opened on the clamping plate, and positioning bolts pass through the bolt holes.

[0014] The positioning nut is fixed on the side of the clamping plate away from the inserting plate, and the positioning bolt passes through the positioning nut.

[0015] On the other hand, the present application relates to a transformer casting method, which uses the aforementioned adjustable coil casting mold, installs an inner mold and an outer mold on a chassis, installs an end cover at the other end of the inner mold and the outer mold, and inserts a plug plate between the chassis and the end cover according to the position of the outer mold shown, screws in the positioning bolts, and the heads of the positioning bolts are tightly pressed against the plug plate, and the plug plate is fixed together with a spring mechanism so that the plug plate supports the outer mold, and the casting is completed. After cooling, the mold is removed; when casting a larger coil, the plug plate inserted between the spring mechanisms is pulled in a direction outward away from the outer mold, and the plug plate is translated to the target position. After replacing a larger outer mold, the positioning bolts are screwed in, and the heads of the positioning bolts are tightly pressed against the plug plate to position the plug plate, support the outer mold, and cast again.

[0016] The present application arranges a plug plate, a clamp plate, a spring mechanism, a positioning bolt and a positioning nut on the outside of the outer mold. The spring mechanism includes a plurality of spring triggers. The plug plate is positioned between two adjacent spring triggers, and the positioning bolt is screwed in to tighten the plug plate, so that the force on the plug plate is balanced and the plug plate can be firmly positioned. During pouring, the plug plate supports the belly of the outer mold, so that the expansion force of the outer mold is limited during the pouring process, preventing the coil from deforming and producing a "big belly", so that the coil size is standard.

[0017] Furthermore, since an adjustable plug plate structure is provided, the position of the plug plate can be adjusted by a spring structure, so that it can be suitable for outer molds of different sizes for coils of different sizes. A set of chassis, end covers and plug plates can be used for coils of different sizes. The pouring sequence can be reasonably set, and there is no need to pull out and insert the plug plate every time the mold is demolded and poured, which enhances the versatility of the mold and makes the operation easier.

[0018] Furthermore, the spring mechanism is symmetrically arranged on both sides of the outer mold, and multiple spring triggers are arranged through the spring mechanism. The plug plate is inserted between the limiting parts of adjacent spring triggers to ensure that the supporting force on both sides of the outer mold is uniform, so that the coil formed by casting is more standard and beautiful.

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A front view of the adjustable coil casting mold of the present application is shown;

[0022] Figure 2 The structural diagram of the adjustable plug plate of the chassis of the adjustable coil casting mold of the present application is shown;

[0023] Figure 3 A partial view of an adjustable insert plate of the chassis of the adjustable coil casting mold of the present application is shown;

[0024] Figure 4 The structural diagram of the adjustable plug plate of the end cover of the adjustable coil casting mold of the present application is shown;

[0025] Figure 5 A partial view of the adjustable plug plate of the end cover of the adjustable coil casting mold of the present application is shown;

[0026] Figure 6 The structural diagram of the chassis of the adjustable coil casting mold of the present application is shown;

[0027] Figure 7 The structural diagram of the end cover of the adjustable coil casting mold of the present application is shown;

[0028] Figure 8 The spring trigger structure diagram of the present application is shown;

[0029] Fig. 9 It shows the structure diagram of the spring trigger of the present application in another direction;

[0030] Fig.10 The structure diagram of the plugboard of the present application is shown;

[0031] Fig.11 A top view of the plugboard of the present application is shown.

[0032] Explanation of the main component symbols: 10-chassis; 20-end cover; 30-inner mold; 40-outer mold; 50-wiring panel; 60-adjustable plug-in plate structure; 61-plug-in plate; 62-clamping plate; 63-spring mechanism; 64-locating bolt; 65-locating nut; 11-chassis slot; 21-end cover slot; 611-flat plate; 612-reinforcement rib; 634-fixing plate; 631-trigger; 632-compression spring; 633-round nail; 6311-limiting part; 6312-connecting part; 6313-rotating part. DETAILED DESCRIPTION

[0033] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0034] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0035] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0036] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0037] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0038] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0039] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0040] The present application provides an adjustable coil casting mold, such as Figure 1-5 As shown, it includes a chassis 10, an end cover 20, an inner mold 30, an outer mold 40, a wiring panel 50 and an adjustable plug-in plate structure 60. The adjustable plug-in plate structure 60 includes a plug-in plate 61, a clamping plate 62, a spring mechanism 63, a positioning bolt 64 and a positioning nut 65.

[0041] like Figure 6 As shown, an inner mold 30 is installed at the center of the chassis 10, and an outer mold 40 is arranged outside the inner mold 30. The outer mold 40 is sleeved outside the inner mold 30. The size of the coil is different, and the size of the outer mold 40 is also different. A chassis groove 11 is opened on the outer side of the outer mold 40 on the chassis. Two parallel chassis grooves 11 are opened on the left and right sides of the chassis, and the chassis grooves 11 extend in an outward direction. The insert plate 61 of the adjustable insert plate structure 60 can be inserted into the chassis groove 11 and slide from the inside to the outside along the chassis groove 11.

[0042] like Figure 7 As shown, the other ends of the inner mold 30 and the outer mold 40 are connected to the end cover 20, and an end cover groove 21 is opened on the end cover 20. The plug plate 61 can be inserted into the end cover groove 21. By inserting the two ends of the end cover groove 21 into the chassis groove 11 and the end cover groove 21 respectively, the plug plate 61 of the adjustable plug plate structure 60 can slide on the chassis 10 and the end cover 20 along the chassis groove 11 and the end cover groove 21, so that the plug plate 61 of the adjustable plug plate structure 60 supports the outer mold 40.

[0043] A clamping plate 62 is provided between the chassis 10 and the end cover 20. The clamping plate 62 is provided at the outermost sides of the chassis 10 and the end cover 20. One end of the clamping plate 62 is welded to the chassis 10, and the other end is connected to the end cover 20 via a fastener. The clamping plate 62 is provided with a bolt hole, through which a positioning bolt 64 passes. A positioning nut 65 is fixed to the side of the clamping plate 62 away from the plug plate 61, through which the positioning bolt 64 passes.

[0044] like Figure 2-5As shown, the adjustable plug plate structure 60 can be adjusted according to the size of the outer mold 40. The plug plate 61 of the adjustable plug plate structure 60 can slide in the direction away from the outer mold 40 under the restriction of the spring mechanism 63, so as to adapt to the outer molds 40 of different sizes. After the plug plate 61 slides to the target position, the positioning bolt 64 is screwed in, and the head of the positioning bolt 64 is tightly pressed against the plug plate 61. The plug plate 61 is subjected to a force from the outside to the inside, which is balanced with the supporting force of the spring mechanism 63, and the plug plate 61 is positioned. Then, during casting, the plug plate 61 can limit the outward deformation of the outer mold 40, which can improve the "big belly" phenomenon that occurs during casting, and obtain a coil with standard size and beautiful appearance.

[0045] like Figure 10-11 As shown, the plug plate 61 includes a flat plate 611 and a reinforcing rib 612. The reinforcing rib 612 is arranged on the flat plate 611. When the plug plate 61 is inserted into the chassis groove 11 and the end cover groove 21, the reinforcing rib 612 is located on the side of the plug plate 61 away from the outer mold. The lower end of the reinforcing rib 612 has a protrusion protruding from the flat plate 611. The protrusion is inserted into the chassis groove 11 to realize the plug plate 61 being inserted into the chassis groove 11, thereby limiting the plug plate.

[0046] like Figure 8-9 As shown, the spring mechanism 63 includes a fixed plate 634 and a plurality of spring triggers. The plurality of spring triggers are fixed on the fixed plate 634 in parallel in a direction outward away from the outer mold 40. The fixed plate 634 is fixed to the upper surface of the chassis 10 and the upper surface of the end cover 20. The number and spacing of the spring triggers can be set according to the size of the coil, the chassis 10, the end cover 20, and the size of the plug plate 61.

[0047] The spring trigger includes a trigger 631, a compression spring 632 and a round nail 633. The trigger 631 is hinged to the fixed plate 634 through the round nail 633. The trigger 631 includes a limiting portion 6311, a connecting portion 6312 and a rotating portion 6313. The limiting portion 6311 extends out of the fixed plate 634. The connecting portion 6312 is fixedly connected to one end of the compression spring 632. The rotating portion 6313 and the connecting portion 6312 are connected to form a round nail hole. A hole is formed on the fixed plate 634. The round nail 633 is inserted into the round nail hole and the hole on the fixed plate 634. The other end of the compression spring 632 is fixed to the fixed plate 634. Multiple spring triggers are fixed on both sides of the plug plate 61. The two sides of the plug plate 61 are respectively inserted between two adjacent limiting portions 6311.

[0048] Due to the arrangement of the compression spring 632, the trigger 631 and the round nail 633, when the plug plate 61 is pulled outward, the trigger 631 rotates, so that the trigger 631 can move from the inside to the outside. When the plug plate 61 is pulled inward, the limiting portion 6311 of the trigger 631 limits the plug plate 61, and the plug plate 61 cannot move from the outside to the inside.

[0049] To further describe the pouring process using the adjustable coil pouring mold, the inner mold 30 and the outer mold 40 are mounted on the chassis 10, the end cover 20 is installed at the other end of the inner mold 30 and the outer mold 40, and the clamping plate 62 is fastened to the end cover 20 by fasteners. Insert the plug plate 61 from top to bottom into the end cover slot 21 of the end cover 20 and the chassis slot 11 of the chassis 10, and after the plug plate 61 is inserted, it is arranged between the limiting parts 6311 of two adjacent triggers 631 close to the outer mold 40. After the plug plate 61 is inserted, screw in the positioning bolt 64 so that the head of the positioning bolt 64 is tightly pressed against the flat plate 611 of the plug plate 61. At this time, the plug plate 61 is subjected to the force from the outside to the inside by the positioning bolt 64, which is balanced with the supporting force of the spring mechanism 63, and the plug plate 61 is firmly positioned so that the plug plate 61 supports the outer mold 40, and then pouring is carried out. During the pouring process, the plug plate 61 supports the outer mold 40, and the expansion force during pouring cannot cause the outer mold 40 to deform, thereby preventing the coil from having a "big belly" phenomenon during the pouring process.

[0050] After the pouring is completed, the coil is cooled and shaped. After the coil is completely cooled and shaped, the positioning bolts 64 on both sides are loosened, the outer mold 40 is demoulded, and the end cover 20 is removed to take out the coil. When the size of the coil to be poured next time is the same as the size of the coil poured last time, there is no need to move the plug plate 61. The outer mold 40 and the end cover 20 are reinstalled, and the positioning bolts 64 are screwed in for pouring. When the coil to be poured next time becomes larger, according to the size of the new coil, the plug plate 61 is moved from the inside to the outside in a direction away from the center, so that the plug plate 61 moves to the target position, the outer mold 40 and the end cover 20 are installed, and pouring is carried out. In the actual pouring process, the pouring process can be reasonably arranged according to the size of each batch of coils. By reasonably arranging the pouring sequence and moving the plug plate 61, the pouring of coils of different sizes can be achieved. During the demolding and pouring process, when the pouring coils are of different sizes, there is no need to pull out and insert the plug plate 61 every time. While solving the "big belly" of the coil, a set of molds has universality and can be used to pour coils of different sizes, and the operation process is relatively simple.

[0051] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An adjustable coil casting mold, characterized in that: include: A chassis, an end cover, an inner mold, an outer mold and a wiring panel, wherein the chassis is connected to one end of the inner mold and the outer mold, the other ends of the inner mold and the outer mold are connected to the end cover, the inner mold is coaxially arranged with the outer mold, and the outer mold is sleeved outside the inner mold; it also includes an adjustable plug plate structure, symmetrical adjustable plug plate structures are arranged on both sides of the outer mold, the adjustable plug plate structure includes a plug plate, a clamping plate, a spring mechanism, a positioning bolt and a positioning nut, the plug plate is installed between the chassis and the end cover, the plug plate can slide along the chassis and the end cover, the spring mechanism limits the plug plate to slide only in the direction away from the outer mold, the plug plate slides to different target positions according to the size of the coil, after the plug plate slides to the target position, the spring mechanism, the positioning bolt and the positioning nut position the plug plate, and the plug plate supports the outer mold.

2. The adjustable coil casting mold according to claim 1, characterized in that: The spring mechanism includes a fixing plate and a plurality of spring triggers, wherein the plurality of spring triggers are fixed on the fixing plate in parallel in a direction outwardly away from the outer mold, and the fixing plate is fixed on the upper surface of the chassis and the upper surface of the end cover.

3. The adjustable coil casting mold according to claim 2, characterized in that: The spring trigger includes a trigger, a compression spring and a round nail. The trigger is hinged to the fixed plate through the round nail. The trigger includes a limiting portion, a connecting portion and a rotating portion. The limiting portion extends and protrudes from the fixed plate. The connecting portion is fixedly connected to one end of the compression spring. A round nail hole is provided in the connection between the rotating portion and the connecting portion. A hole is provided on the fixed plate. The round nail is inserted into the round nail hole and the hole. The other end of the compression spring is fixed to the fixed plate.

4. The adjustable coil casting mold according to claim 3, characterized in that: The multiple spring triggers are fixed on both sides of the plug board, and the two sides of the plug board are respectively inserted between two adjacent limiting parts.

5. The adjustable coil casting mold according to claim 1, characterized in that: The insert plate comprises a flat plate and a reinforcing rib, wherein the reinforcing rib is arranged on a side of the flat plate away from the outer mold, and a lower end of the reinforcing rib has a protruding portion protruding from the flat plate.

6. The adjustable coil casting mold according to claim 5, characterized in that: A chassis groove is provided on the chassis, and the protruding portion of the reinforcing rib is inserted into the chassis groove.

7. The adjustable coil casting mold according to claim 5, characterized in that: The end cover is provided with an end cover groove, and the plug plate is inserted in the end cover groove.

8. The adjustable coil casting mold according to claim 1, characterized in that: A clamping plate is arranged between the chassis and the end cover, and the clamping plate is arranged at the outermost sides of the chassis and the end cover. Bolt holes are opened on the clamping plate, and the positioning bolts pass through the bolt holes.

9. The adjustable coil casting mold according to claim 8, characterized in that: The positioning nut is fixed on a side of the clamping plate away from the inserting plate, and the positioning bolt passes through the positioning nut.

10. A transformer casting method, using the adjustable coil casting mold according to any one of claims 1 to 9, characterized in that: The inner mold and the outer mold are installed on the chassis, and the end cover is installed at the other end of the inner mold and the outer mold. According to the position of the outer mold shown, the plug plate is inserted between the chassis and the end cover, and the positioning bolt is screwed in. The head of the positioning bolt is tightly pressed against the plug plate, and the plug plate is fixed together with the spring mechanism so that the plug plate supports the outer mold. After the pouring is completed and cooled, the mold is removed. When pouring a larger coil, the plug plate inserted between the spring mechanism is pulled in a direction away from the outer mold, and the plug plate is translated to the target position. After replacing a larger outer mold, the positioning bolt is screwed in, and the head of the positioning bolt is tightly pressed against the plug plate to position the plug plate, support the outer mold, and perform pouring again.

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