Dry-type transformer pouring mold

Abstract

The utility model provides a kind of dry-type transformer pouring mold, comprising: interval setting outer mould and inner mould, inner mould is located the inside of outer mould, and outer mould and inner mould are enclosed to form pouring cavity, and inner mould can produce deformation;Pulling tool, pulling tool is set in the side of inner mould away from outer mould, and pulling tool includes connecting rod mechanism and multiple joint points connected with connecting rod mechanism, and multiple joint points are connected with the opposite sides of inner mould respectively, when pulling tool is pulled by external force, connecting rod mechanism drives multiple joint points to mutually draw close, so that inner mould is deformed and shrinks.The dry-type transformer pouring mold in the utility model solves the technical problem of low efficiency of inner mould demolding in related art dry-type transformer pouring mold.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer casting mold technology, specifically to a dry-type transformer casting mold. Background Technology

[0002] Dry-type transformers, due to their characteristics of being flame-retardant, safe, reliable in operation, easy to maintain, and small in size, have been widely used in high-rise buildings and power plants in cities. Generally, dry-type transformers are used after epoxy resin or other insulating materials are poured onto the wound coils to form a solid. Currently, the molds used for casting dry-type transformers consist of a base, an inner mold, an outer mold, and a cover. The cover is placed between the inner and outer molds to form a casting cavity. The wound coils are placed on the inner mold, and then the insulating material is poured into the casting cavity. After the insulating material has completely cured, the outer and inner molds need to be removed separately, and then the coil with the poured insulating material is removed, completing the process of casting the insulating material for the dry-type transformer.

[0003] In the existing technology, the outer mold is generally composed of multiple separate parts, which are fixed together by bolts. When disassembling the outer mold, it is only necessary to loosen the bolts to quickly complete the disassembly and assembly of the outer mold. However, the inner mold is located inside the mold and has a certain degree of adhesion to the insulating material during the pouring and curing process, which makes the disassembly of the inner mold more difficult.

[0004] Therefore, existing technologies need further development. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a dry-type transformer casting mold to solve the technical problem of low demolding efficiency of the inner mold in the dry-type transformer casting mold in related technologies.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: a dry-type transformer casting mold is provided, comprising: an outer mold and an inner mold spaced apart, the inner mold being located inside the outer mold, the outer mold and the inner mold forming a casting cavity, the inner mold being capable of deformation; a pulling fixture, the pulling fixture being located on the side of the inner mold away from the outer mold, the pulling fixture including a linkage mechanism and multiple joints connected to the linkage mechanism, the multiple joints being respectively connected to opposite sides of the inner mold, when the pulling fixture is pulled by an external force, the linkage mechanism drives the multiple joints to move closer to each other, causing the inner mold to deform and shrink.

[0007] Furthermore, the linkage mechanism includes: a support body and multiple connectors. The support body is movably arranged along the extension direction of the dry-type transformer casting mold. The multiple connectors are respectively arranged on opposite sides of the support body. The multiple connectors are rotatably connected to the support body. The ends of the multiple connectors away from the support body are respectively connected to corresponding joint points.

[0008] Furthermore, the support body includes: a first support rod and a second support rod arranged opposite to each other, the first support rod and the second support rod being rotatably connected to a plurality of connecting parts respectively; a third support rod, the two ends of the third support rod being connected to the first support rod and the second support rod respectively, and the third support rod extending along the extension direction of the dry-type transformer casting mold.

[0009] Furthermore, the third support rod includes two rods, which are spaced apart along the extension direction of the first or second support rod.

[0010] Furthermore, the multiple connectors include a connector group connected to the same end of the first support rod or the second support rod. The connector group includes a first connector and a second connector. Both the first connector and the second connector are rotatably arranged. The end of the first connector away from the second connector is connected to a relevant node, and the end of the second connector away from the first connector is connected to a relevant node. The end of the first connector near the second connector is provided with an assembly groove, and the end of the second connector near the first connector is provided with an abutting surface. The abutting surface and the bottom surface of the assembly groove can be abutted against each other. Furthermore, the connector assembly includes at least four connector assemblies, which are respectively disposed on opposite sides of the support body.

[0011] Furthermore, the dry-type transformer casting mold includes a fixed seat, which is installed on the side of the inner mold away from the outer mold. The fixed seat extends along the extension direction of the dry-type transformer casting mold. The fixed seat is connected to the connectors through joints. There are multiple fixed seats, and each of the multiple fixed seats is respectively set with at least four connector groups.

[0012] Furthermore, a lifting ring is provided on the first support rod for connecting to the lifting equipment.

[0013] Furthermore, the inner mold is formed by connecting the ends of the sheet metal together. A connecting plate is provided at the connection point of the ends of the sheet metal. There are two connecting plates, which are respectively connected to the two ends of the sheet metal. The two connecting plates are detachably connected.

[0014] Furthermore, the two connecting plates include a first connecting plate and a second connecting plate, wherein the first connecting plate is provided with a connecting boss, and the second connecting plate is provided with a connecting groove corresponding to the connecting boss. Beneficial effects: 1. By setting up a pulling fixture, which is located inside the mold, the pulling force of the pulling fixture is converted into the lateral displacement of the joints under the action of external force, so that multiple joints move closer to each other, thereby causing local deformation and shrinkage of the inner mold. The deformed part will also separate from the solidified insulator. As the external force continues to pull the inner mold, the separated area becomes larger and larger until the inner mold is completely separated from the solidified insulator.

[0015] 2. With the dry-type transformer casting mold of this embodiment, after the insulation material has cured, the inner mold can be quickly separated from the casting by pulling the tooling manually or with lifting equipment. This significantly improves the efficiency of inner mold disassembly and solves the technical problem of low disassembly efficiency of inner mold in related technologies. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the dry-type transformer casting mold used in this embodiment of the utility model; Figure 2 This is a schematic diagram of the internal structure of the dry-type transformer casting mold used in this embodiment of the utility model; Figure 3 This is a schematic diagram of the linkage mechanism of the dry-type transformer casting mold used in this embodiment of the utility model; Figure 4 yes Figure 3 An enlarged view of point A in the image; Figure 5 This is a schematic diagram of the dry-type transformer casting mold with the cover removed, as used in this embodiment of the utility model. Figure 6 yes Figure 5 An enlarged view of point B in the image.

[0017] The above figures include the following reference numerals: 1. Outer mold; 2. Inner mold; 3. Linkage mechanism; 31. Support body; 311. First support rod; 312. Second support rod; 313. Third support rod; 32. Connector; 321. First connector; 3211. Assembly groove; 322. Second connector; 3221. Abutment surface; 4. Joint point; 5. Lifting ring; 61. First connecting plate; 611. Connecting boss; 62. Second connecting plate; 621. Connecting groove; 7. Fixing seat. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] According to an embodiment of this utility model, a dry-type transformer casting mold is provided. Please refer to [link / reference]. Figures 1 to 6It includes: an outer mold 1 and an inner mold 2 spaced apart, the inner mold 2 being located inside the outer mold 1, the outer mold 1 and the inner mold 2 forming a casting cavity, the inner mold 2 being able to deform; a pulling fixture, the pulling fixture being located on the side of the inner mold 2 away from the outer mold 1, the pulling fixture including a linkage mechanism 3 and multiple joints 4 connected to the linkage mechanism 3, the multiple joints 4 being connected to the opposite sides of the inner mold 2 respectively, when the pulling fixture is pulled by an external force, the linkage mechanism 3 drives the multiple joints 4 to move closer to each other, causing the inner mold 2 to deform and shrink.

[0020] Preferably, the inner mold 2 is made of thin sheet metal such as iron. When not subjected to external force, the inner mold 2 maintains its original shape, ensuring that the cavity size is stable and the insulation layer thickness is uniform during the casting process. When demolding is required, the inner mold 2 is deformed and contracted by external force, thereby forming a demolding gap between the inner mold 2 and the solidified insulator. This allows the inner mold 2 to effectively support the poured insulator while also deforming under external force during demolding, making the inner mold 2 easy to demold.

[0021] By setting up a pulling fixture located inside the mold, the pulling force of the pulling fixture is converted into the lateral displacement of the joint 4 under the action of external force, so that multiple joints 4 move closer to each other, thereby causing local deformation and shrinkage of the inner mold 2. The deformed part will also separate from the solidified insulator. As the external force continues to pull the inner mold 2, the separated area becomes larger and larger until the inner mold 2 is completely separated from the solidified insulator.

[0022] The dry-type transformer casting mold of this embodiment allows the inner mold 2 to be quickly separated from the casting part by simply pulling the tooling manually or with lifting equipment after the insulation material has cured. This significantly improves the efficiency of inner mold disassembly and solves the technical problem of low disassembly efficiency of inner mold in dry-type transformer casting molds in related technologies.

[0023] In the dry-type transformer casting mold of this embodiment, see... Figure 2 The linkage mechanism 3 includes a support body 31 and multiple connecting members 32. The support body 31 is movably arranged along the extension direction of the dry-type transformer casting mold. The multiple connecting members 32 are respectively arranged on opposite sides of the support body 31 and are rotatably connected to the support body 31. The ends of the multiple connecting members 32 away from the support body 31 are respectively connected to the corresponding joint points 4. By setting the support body 31, the structural strength of the entire linkage mechanism is improved. The support body 31 is axially movable along the extension direction of the dry-type transformer casting mold, and can be directly connected to the lifting equipment. When an external force pulls the support body 31, it simultaneously drives the multiple connecting members 32 to move upward with the support body 31 and simultaneously swing relative to each other, thereby driving the multiple joint points 4 to move closer together.

[0024] In the dry-type transformer casting mold of this embodiment, see... Figure 3 The supporting body 31 includes: a first support rod 311 and a second support rod 312 arranged opposite to each other, the first support rod 311 and the second support rod 312 being rotatably connected to a plurality of connecting pieces 32; and a third support rod 313, the two ends of which are connected to the first support rod 311 and the second support rod 312 respectively, and the third support rod 313 extending along the extension direction of the dry-type transformer casting mold. By setting the first support rod 311 and the second support rod 312 arranged opposite to each other, more joints 4 can be connected to the inner mold, thereby increasing the deformation speed of the inner mold and thus improving the demolding efficiency of the inner mold. The third support rod 313 enables the first support rod 311 and the second support rod 312 to move synchronously, when the first support rod 311 is pulled, the second support rod 312 is pulled synchronously.

[0025] Understandably, multiple support rods can be set according to actual needs. For example, based on two support rods, three, four, or more support rods can be set according to the height of the inner mold 2.

[0026] In the dry-type transformer casting mold of this embodiment, see... Figure 3 The third support rod 313 comprises two rods, which are spaced apart along the extension direction of the first support rod 311 or the second support rod 312. By setting two third support rods 313, a rigid frame is formed, increasing the structural strength of the entire linkage mechanism.

[0027] In the dry-type transformer casting mold of this embodiment, see... Figure 3-4 Multiple connectors 32 include a connector group that is connected to the same end of the first support rod 311 or the second support rod 312. The connector group includes a first connector 321 and a second connector 322. Both the first connector 321 and the second connector 322 are rotatably arranged. The end of the first connector 321 away from the second connector 322 is connected to a relevant node 4. The end of the second connector 322 away from the first connector 321 is also connected to a relevant node 4. The first connector 321 is provided with an assembly groove 3211 at the end near the second connector 322. The second connector 322 is provided with an abutment surface 3221 at the end near the first connector 321. The abutment surface 3221 and the bottom surface of the assembly groove 3211 are abutted against each other.

[0028] Specifically, the shape of the abutment surface 3221 matches the bottom surface of the assembly groove 3211. For example, if the bottom surface of the assembly groove 3211 is flat, the abutment surface 3221 is also flat. When the linkage mechanism resets, when the first connecting member 321 and the second connecting member 322 rotate until the abutment surface 3221 abuts against the bottom surface of the assembly groove 3211, the first connecting member 321 and the second connecting member 322 stop rotating, thus maintaining a certain included angle between the first connecting member 321 and the second connecting member 322, which serves as a stroke limit and prevents the first connecting member 321 and the second connecting member 322 from over-rotating. Preferably, when the rotation stroke of the first connecting member 321 and the second connecting member 322 ends, both the first connecting member 321 and the second connecting member 322 are in a horizontal state. At this time, both the bottom surface of the assembly groove 3211 and the abutment surface 3221 extend along the height direction.

[0029] In the dry-type transformer casting mold of this embodiment, see... Figure 3 The connecting parts assembly includes at least four connecting parts, which are respectively arranged on opposite sides of the support body 31. By setting multiple connecting parts on both sides of the support body 31, more joint points 4 can be connected to the inner mold, enabling the inner mold 2 to be subjected to force at multiple positions simultaneously, thereby increasing the deformation speed of the inner mold and thus improving the demolding efficiency of the inner mold.

[0030] Preferably, the connecting parts assembly includes four connecting parts groups, two of which are connected to the ends of the first support rod 311 respectively, and these two connecting parts groups are located in the upper half of the inner mold 2. The other two connecting parts groups are connected to the ends of the second support rod 312 respectively, and these two connecting parts groups are located in the lower half of the inner mold 2. At the same time, the entire linkage mechanism 3 is centrally located in the inner mold 2. The first connecting plate 61 and the second connecting plate 62 are located between the two connecting parts groups. In this way, through the supporting effect of the linkage mechanism 3, the first connecting plate 61 and the second connecting plate 62 can be kept connected without the need for additional reinforcement, thereby maintaining the structural shape of the inner mold 2 and forming a cylindrical structure. After disassembly, by resetting the linkage and adjusting the connection state of the first connecting plate 61 and the second connecting plate 62, the entire inner mold 2 can be quickly restored to a cylindrical shape.

[0031] In the dry-type transformer casting mold of this embodiment, see... Figure 2 The dry-type transformer casting mold includes a fixing seat 7, which is installed on the side of the inner mold 2 away from the outer mold 1. The fixing seat 7 extends along the extension direction of the dry-type transformer casting mold. The fixing seat 7 is connected to the connector 32 through a joint 4. There are multiple fixing seats 7, and each of the multiple fixing seats 7 is respectively provided with at least four connector groups. Specifically, the fixing seat 7 provides an installation reference for the joint 4 and transmits the contraction force applied by the connector 32 to the corresponding part of the inner mold 2.

[0032] In the dry-type transformer casting mold of this embodiment, see... Figure 2 A lifting ring 5 is provided on the first support rod 311, which is used to connect with the lifting equipment. By providing the lifting ring 5, the inner mold 2 can be easily lifted by the lifting equipment. The lifting equipment is connected to the lifting ring 5 by slings or hooks and applies an upward pulling force, thereby driving the entire support body 31 to move axially.

[0033] In the dry-type transformer casting mold of this embodiment, see... Figure 5-6 The inner mold 2 is formed by connecting the two ends of a sheet of material. Two connecting plates are provided at the joint between the two ends of the sheet material, and these two connecting plates are detachably connected. By providing two connecting plates, the two ends of the sheet material can be connected end to end, thus forming the cylindrical inner mold 2.

[0034] In the dry-type transformer casting mold of this embodiment, see... Figure 5-6 The two connecting plates include a first connecting plate 61 and a second connecting plate 62. The first connecting plate 61 is provided with a connecting boss 611, and the second connecting plate 62 is provided with a connecting groove 621 corresponding to the connecting boss 611. In this way, by providing the connecting boss 611 and the connecting groove 621, when the two ends of the plates are connected end to end, the connecting boss 611 and the connecting groove 621 are used for positioning, so that the two connecting plates can be accurately and quickly connected.

[0035] In the dry-type transformer casting mold of this embodiment, the dry-type transformer casting mold also includes components such as a cover and a base. The outer mold 1 can realize quick mold assembly and disassembly. The above technical solutions are all existing technologies, so they will not be described in detail in this patent.

[0036] The working process of the dry-type transformer casting mold is as follows: First, the cover is removed, and the wound dry-type transformer coil is placed on the outside of the inner mold 2. Then, the cover is connected to the outer mold 1. Liquid insulating material is poured from the inlet on the cover into the space between the outer mold 1 and the inner mold 2 until the insulating material is full. After a period of drying and solidification, the outer mold 1 and the cover are removed. Then, the base plate is removed. The lifting ring 5 on the support body 31 is hooked by the lifting equipment, and an upward pulling force is applied to drive the linkage mechanism 3 to move. The support body 31 drives multiple connecting parts 32 to swing, and synchronously drives the corresponding joint points 4 to move closer to each other. The joint points 4 transmit the contraction force to multiple parts of the inner mold 2 through the fixed seat 7, causing the inner mold 2 to undergo radial contraction deformation. The inner mold 2 gradually separates from the solidified insulating material. The pulling force continues to be applied until the inner mold 2 is completely separated from the solidified insulating material, so that the outer side of the inner mold 2 is separated from the solidified insulating material and removed. Then, the coil with the poured insulating material is removed, completing the casting process of the dry-type transformer insulating material.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0039] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0040] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0041] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A dry-type transformer casting mold, characterized in that, include: An outer mold (1) and an inner mold (2) are spaced apart. The inner mold (2) is located inside the outer mold (1). The outer mold (1) and the inner mold (2) enclose and form a casting cavity. The inner mold (2) is capable of deformation. A pulling fixture is provided on the side of the inner mold (2) away from the outer mold (1). The pulling fixture includes a linkage mechanism (3) and multiple joints (4) connected to the linkage mechanism (3). The multiple joints (4) are respectively connected to the opposite sides of the inner mold (2). When the pulling fixture is pulled by an external force, the linkage mechanism (3) drives the multiple joints (4) to move closer to each other, causing the inner mold (2) to deform and shrink.

2. The dry-type transformer casting mold according to claim 1, characterized in that, The linkage mechanism (3) includes: The support body (31) and multiple connectors (32) are provided. The support body (31) is movably arranged along the extension direction of the dry transformer casting mold. The multiple connectors (32) are respectively arranged on opposite sides of the support body (31). The multiple connectors (32) are rotatably connected to the support body (31). The ends of the multiple connectors (32) away from the support body (31) are respectively connected to the corresponding joint points (4).

3. The dry-type transformer casting mold according to claim 2, characterized in that, The supporting body (31) includes: The first support rod (311) and the second support rod (312) are arranged opposite to each other, and the first support rod (311) and the second support rod (312) are rotatably connected to the plurality of the connecting members (32); The third support rod (313) is connected at both ends to the first support rod (311) and the second support rod (312) respectively, and the third support rod (313) extends along the extension direction of the dry transformer casting mold.

4. The dry-type transformer casting mold according to claim 3, characterized in that, The third support rod (313) includes two rods, which are spaced apart along the extension direction of the first support rod (311) or the second support rod (312).

5. The dry-type transformer casting mold according to claim 3, characterized in that, The plurality of connectors (32) include a connector group that is connected to the same end of the first support rod (311) or the second support rod (312). The connector group includes a first connector (321) and a second connector (322). The first connector (321) and the second connector (322) are rotatably disposed. The end of the first connector (321) away from the second connector (322) is connected to a relevant node (4), and the end of the second connector (322) away from the first connector (321) is connected to the relevant node (4). The first connector (321) has an assembly groove (3211) at one end near the second connector (322), and the second connector (322) has an abutment surface (3221) at one end near the first connector (321). The abutment surface (3221) and the bottom surface of the assembly groove (3211) are abutted together.

6. The dry-type transformer casting mold according to claim 5, characterized in that, The connector group includes at least four connector groups, which are respectively disposed on opposite sides of the support body (31).

7. The dry-type transformer casting mold according to claim 6, characterized in that, The dry-type transformer casting mold includes a fixed seat (7), which is installed on the side of the inner mold (2) away from the outer mold (1). The fixed seat (7) extends along the extension direction of the dry-type transformer casting mold. The fixed seat (7) is connected to the connector (32) through the joint (4). The fixed seat (7) includes multiple fixed seats, and the multiple fixed seats (7) are respectively arranged corresponding to at least four connector groups.

8. The dry-type transformer casting mold according to claim 3, characterized in that, The first support rod (311) is provided with a lifting ring (5), which is used to connect with the lifting equipment.

9. The dry-type transformer casting mold according to claim 1, characterized in that, The inner mold (2) is formed by connecting the ends of the plates together. A connecting plate is provided at the connection point of the ends of the plates. There are two connecting plates, which are respectively connected to the two ends of the plates and are detachably connected.

10. The dry-type transformer casting mold according to claim 9, characterized in that, The two connecting plates include a first connecting plate (61) and a second connecting plate (62), wherein the first connecting plate (61) is provided with a connecting boss (611) and the second connecting plate (62) is provided with a connecting groove (621) corresponding to the connecting boss (611).

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