Pouring mold for integral forming of transformer

Abstract

The utility model relates to the technical field of transformer production equipment, in particular to a pouring mold for integrally forming a transformer. Comprising a winding mold, the winding mold comprises a top plate, a bottom plate, a plurality of side plates surrounding the peripheral side of the bottom plate and a mounting core column, a winding pouring cavity with an opening in the top is defined by the side plates and the bottom plate, and the top plate is arranged at a cavity opening of the winding pouring cavity; a mounting core column is mounted in the winding pouring cavity, and the mounting core column is connected to the side plate in a sealing manner so as to support a coil main body of the transformer in the pouring process and enable the coil main body to be suspended in the winding pouring cavity; the bottom plate is provided with an overflowing hole for a binding post of the output end to penetrate out. And the output terminal mold is located outside the winding pouring cavity and connected to the bottom plate in a sealed mode, a terminal pouring cavity is formed in the output terminal mold, and the terminal pouring cavity communicates with the winding pouring cavity through an overflowing hole. The casting mold can be formed by one-time integral casting, is fast and convenient, and effectively improves the casting quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer production equipment technical field, specifically is a kind of pouring mould for transformer integrated forming. BACKGROUND

[0002] Epoxy resin-poured dry-type transformer has the characteristics of good electrical performance, strong lightning-impact resistance, strong short-circuit resistance, small size and light weight, etc.; moreover, it is safe and stable in operation, pollution-free, low-noise and maintenance-free, and has been widely used in various power-using places.

[0003] When pouring epoxy resin, a mold usually needs to be made for the dry-type transformer. At present, the commonly used mold is complex in design, and usually distinguishes multiple parts such as high-voltage winding, low-voltage winding and lead terminal. A single transformer usually needs to be poured multiple times, and the next pouring needs to be performed after the poured part is solidified, which greatly affects the production efficiency. In addition, the quality and color of different pouring parts may not be consistent when poured in batches, and the processing of different pouring connection positions is complex, which is prone to fracture. Therefore, it is urgent to solve the problem. SUMMARY

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a pouring mold for transformer integrated forming. The utility model can be integrally poured at one time, which is fast and convenient, and effectively improves the pouring quality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A pouring mold for transformer integrated forming, comprising: a winding mold, the winding mold comprising a top plate, a bottom plate, a plurality of side plates enclosed around the side of the bottom plate, and a mounting core column, a winding pouring cavity with an open top is enclosed between each side plate and the bottom plate, and the top plate is arranged at the cavity opening of the winding pouring cavity; the mounting core column is installed in the winding pouring cavity, and the mounting core column is sealingly connected to the side plate to support the coil body of the transformer and suspend the coil body in the winding pouring cavity during pouring; the bottom plate is provided with a flow hole for the wiring column of the output terminal to pass through; and an output terminal mold, the output terminal mold is located outside the winding pouring cavity and is sealingly connected to the bottom plate, the output terminal mold forms a terminal pouring cavity, and the terminal pouring cavity is communicated with the winding pouring cavity through the flow hole.

[0007] According to the scheme, the winding mold and the output terminal mold are fixed as a whole, the integration of the transformer pouring process is realized, the pouring operation is facilitated, and the pouring efficiency is significantly improved. The introduction of the installation core column enables the coil body to be suspended and arranged, thereby ensuring the uniformity and quality of pouring. In addition, the design of the threading hole and the flow hole not only ensures the smooth threading of the input and output ends of the winding, but also realizes the circulation of the insulating liquid, thereby further improving the sealing performance and insulation performance of pouring. The sealed communication design of the terminal pouring cavity and the winding pouring cavity enables the entire pouring process to be completed at one time, greatly simplifies the production process, and improves the consistency of the pouring quality.

[0008] As a further scheme of the utility model: the top plate is arranged at a position away from the upper edge of the side plate by a predetermined distance, and a plurality of pouring holes for pouring the solidifiable insulating liquid are formed in the top plate.

[0009] According to the scheme, the area enclosed between the top plate and the upper edge of the side plate can accommodate the insulating liquid during the pouring process, thereby preventing the insulating liquid from overflowing. In addition, the plurality of pouring holes facilitate uniform pouring of the insulating liquid and reduce the generation of air bubbles.

[0010] As a further scheme of the utility model: the inner side plate surface of the two oppositely arranged side plates is provided with a positioning step near the upper edge, and the top plate is lapped on the two oppositely arranged positioning steps to cover the cavity opening of the winding pouring cavity.

[0011] According to the scheme, the top plate and the positioning step can serve as a limiting structure for pouring. The positioning step enables the top plate to be stably lapped on the side plate, thereby ensuring the tight closure of the cavity opening of the winding pouring cavity during the pouring process and simplifying the installation and disassembly process of the top plate.

[0012] As a further scheme of the utility model: the side plate is provided with a first lifting hole for lifting near the upper edge; and / or the center of the installation core column is provided with a second lifting hole.

[0013] According to the scheme, the design of the lifting hole provides great convenience for the carrying and installation of the mold. Through the lifting hole, the mold can be easily moved to the designated position by using lifting equipment, thereby reducing the labor intensity of manual carrying and improving the production efficiency. At the same time, the design of the lifting hole also considers the balance of the mold, thereby ensuring the safety and stability during the lifting process.

[0014] As a further scheme of the utility model: the inner side plate surface of the bottom plate towards the winding pouring cavity is further recessed with at least one annular groove coaxial with the overflow hole, the annular groove is used for pouring the insulation protrusion on the outer surface of the winding pouring body; and / or the bottom plate is connected with each other by two groups of identical sub-plates, and the overflow hole is formed by two half-circle holes.

[0015] According to the scheme, the bottom plate part of the pouring mold is designed specially, and the pouring of the insulation protrusion is realized by one-piece forming.

[0016] As a further scheme of the utility model: the transition between the inner side plate surfaces of the two adjacent side plates is a smooth transition surface.

[0017] According to the scheme, the transformer winding part obtained after the pouring forming has a smooth surface, and the workload of polishing the surface of the transformer after the pouring process is completed is reduced.

[0018] As a further scheme of the utility model: a mounting step is arranged at the inner edge of the bottom of the side plate, the shoulder of the mounting step is lapped downward on the outer edge of the bottom plate; a plurality of first connecting holes are formed through the step surface of the mounting step, a plurality of first threaded holes matched with the first connecting holes are formed on the outer side surface of the bottom plate, and a first bolt is connected with the first connecting holes and the first threaded holes through the first connecting holes, so as to fix and install the side plate on the bottom plate.

[0019] According to the scheme, the mounting step, the first connecting hole, the first threaded hole and the fastening effect of the first bolt are matched, so that the side plate and the bottom plate are firmly connected. The detachable connection mode not only facilitates the assembly and disassembly of the mold, but also ensures the accurate positioning and sealing between the parts of the mold. In addition, the design of the mounting step also enhances the overall structural strength of the mold and improves the service life.

[0020] As a further scheme of the utility model: one of the two adjacent side plates is provided with a clamping step, a second connecting hole is formed at the clamping step, the other of the two adjacent side plates is provided with a second threaded hole, and a second bolt is connected with the second connecting hole and the second threaded hole through the second connecting hole, so as to fix the adjacent side plates.

[0021] According to the scheme, the winding part of the transformer is poured into a regular cuboid, the clamping step and the threaded fastening design realize the firm connection between the adjacent side plates, and the stability and sealing of the mold during the pouring process are improved.

[0022] As a further scheme of the utility model: the side plate is also provided with a threading hole for the winding input end to pass through, the side plate at the winding input end is provided with a positioning hole, a bushing for pouring the winding input end connector is sealingly connected and installed in the positioning hole, a connector pouring cavity in the bushing and the winding pouring cavity are in communication with each other, and the threading hole is arranged on the bushing.

[0023] According to the scheme, the cooperation of the positioning hole and the bushing makes the pouring of the winding input end connector more convenient and accurate. The communication design of the connector pouring cavity in the bushing and the winding pouring cavity ensures the sufficient filling and sealing of the insulating liquid in the pouring process. Meanwhile, the threading hole is arranged on the bushing, which is convenient for the passing and connection of the winding input end. The design improves the quality and reliability of the pouring product, and is also convenient for subsequent assembly and use.

[0024] As a further scheme of the utility model: the output terminal mold comprises a connecting sleeve and a double clamp plate, the connecting sleeve is used for sleeving on the output end terminal post to pour the insulating base column; the double clamp plate is connected to one end of the axial direction of the connecting sleeve and comprises two sub-clamp plates which are closed and internally formed with disc-shaped clamp cavities, the clamp cavities and the sleeve holes of the connecting sleeve are in communication with each other to form the terminal pouring cavity, and the inner diameter of the clamp cavity is greater than the inner diameter of the sleeve hole; and / or the output terminal mold is formed by closing and splicing two groups of terminal mold shells with the same structure.

[0025] According to the scheme, an output terminal mold with simple structure and convenient production and assembly is provided. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a half-section structure schematic view of the pouring mold according to a preferred embodiment of the utility model.

[0027] Figure 2 It is a whole structure schematic view of the pouring mold according to Figure 1 .

[0028] Figure 3 It is an explosion structure schematic view of the winding mold in Figure 2 .

[0029] Figure 4 It is a structure schematic view of the output terminal mold in Figure 2 .

[0030] Figure 5 It is an explosion structure schematic view of the output terminal mold in Figure 2 .

[0031] Figure 6 It is a top view structure schematic view of the bottom plate in Figure 3 .

[0032] Figure 7 For Figure 3 Structure diagram of side plate of middle bottom plate.

[0033] Figure 8 For Figure 3 Structure diagram of side plate with second connecting hole in middle.

[0034] Figure 9 For Figure 3 Structure diagram of second threaded hole in middle.

[0035] Figure 10 For Figure 3 Structure diagram of side plate with mounting hole in middle.

[0036] Figure 11 For Figure 3 Another structure diagram of side plate in middle, wherein arc-shaped edge is shown.

[0037] Figure 12 For Figure 1 Structure diagram of bushing in middle.

[0038] In the figure: 1, winding mold; 11, bottom plate; 111, first threaded hole; 112, through-flow hole; 113, partition plate; 114, demolding hole; 115, annular groove; 12, side plate; 12a, front side plate; 12b, rear side plate; 12c, left side plate; 12d, right side plate; 121, positioning step; 122, mounting step; 123, first connecting hole; 124, second connecting hole; 125, second threaded hole; 126, first lifting hole; 127, mounting hole; 128, positioning hole; 129, arc-shaped edge; 1210, clamping step; 13, mounting core column; 131, second lifting hole; 14, bushing; 141, threading hole; 15, top plate; 151, pouring hole; 2, output terminal mold; 21, connecting sleeve; 22, double clamping plate; 221, clamping cavity; 23, connecting plate; 24, support plate. DETAILED DESCRIPTION

[0039] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other cases, some technical features known to the art are not described in order not to obscure the present application embodiments.

[0040] For a thorough understanding of the present application, reference will be made to the following detailed description, in conjunction with the accompanying drawings. It is apparent that the present application can be practiced without specific details, which are well known to those skilled in the art. The following detailed description is presented in order to provide a thorough understanding of the present application. It is not intended to limit the present application to the exact construction described herein.

[0041] It is to be understood that the terms used herein are for the purpose of describing specific embodiments and are not intended to be limiting of the present application, and that singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. When the terms "comprises" and / or "comprising" are used in this specification, they are taken to specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term "upper," "lower," "front," "rear," "left," "right," and similar terms are used for explanation only and not limiting purposes.

[0042] The ordinal numbers such as "first" and "second" used in the present application are merely identifiers, and do not have any other meaning, such as a specific order. Also, for example, the term "first member" does not by itself imply the existence of a "second member," and the term "second member" does not by itself imply the existence of a "first member."

[0043] In this document, "approximately," "about," and the like are used to describe and account for small fluctuations, such as can be expected in manufacturing or other processes, which are well within the bounds of the art.

[0044] Unless otherwise indicated, numerical ranges herein are inclusive of the recited two endpoints in their entirety.

[0045] Hereinafter, a detailed description will be given of the specific structure of the transformer integrated molding pouring mold according to the present application with reference to the accompanying drawings, which show representative embodiments of the present application, and are not intended to limit the present application.

[0046] Please refer to Figures 1-12 In the present application, a transformer integrated molding pouring mold includes a winding mold 1 and an output terminal mold 2. During assembly and pouring, the winding mold 1 is located above the output terminal mold 2. It can be understood that the above, below, top, bottom, and the like in the following description are described with reference to the placement position during pouring. The inner and outer directions in the following description are taken as the inner side facing the pouring cavity.

[0047] AsFigures 1-3 , and Figures 6-12 As shown in the drawings, in the embodiment, the winding mold 1 comprises a rectangular bottom plate, four side plates 12 surrounding the four sides of the bottom plate 11, and a top plate 15 covering the opening of the winding pouring cavity. The number of the side plates can be determined according to the shape of the transformer.

[0048] As shown in the drawings, Figure 3 , Figure 6 and Figure 7 The bottom plate 11 is formed by splicing two groups of identical sub-plates 113. The center of the spliced bottom plate 11 forms a flow-through hole 112 formed by the butt joint of two semicircular holes, which is used to connect the winding pouring cavity and the terminal pouring cavity. At least one annular groove 115 coaxial with the flow-through hole 112 is recessed on the upper surface of the bottom plate 11 (facing the winding pouring cavity), which is used to pour an insulation protrusion on the outer surface of the winding pouring body of the transformer. In the embodiment, the insulation protrusion is configured as an insulation cylinder.

[0049] In the embodiment, two annular grooves 115 are designed on the bottom plate 11 to form two insulation cylinders, thereby effectively increasing the creepage distance between the input end and the output end. A plurality of first threaded holes 111 are formed on the four outer sides of the bottom plate 11 for mounting the side plates 12. Referring to Figure 7 , the extension direction of the first threaded hole 111 is perpendicular to the thickness direction of the bottom plate 11.

[0050] In particular, referring to Figure 7 , a demolding hole 114 is provided on the side edge of the bottom plate 11 to facilitate demolding. During demolding, the demolding hole 114 can cooperate with the demolding tool to achieve rapid demolding of the bottom plate 11.

[0051] As shown in the drawings, Figure 3 , and Figures 7-12 In the embodiment, the four side plates 12 are generally rectangular in structure and comprise three types. The left side plate 12c and the right side plate 12d are identical in structure and belong to the first type. The front side plate 12a is provided with both mounting holes 127 and positioning holes 128 and belongs to the second type. The rear side plate 12b is provided with only mounting holes 127 and belongs to the third type.

[0052] Referring to Figure 3 and Figure 8 , the left side plate 12c and the right side plate 12d are designed as stepped shapes except for the top edge (upper side edge). The steps formed by the two side edges are called engagement steps 1210. During assembly of the winding mold, the engagement steps 1210 are used to engage the front side plate 12a and the rear side plate 12b. A plurality of second connecting holes 124 are formed on the stepped surface of the engagement steps 1210 (see Figure 8) for cooperation with the second threaded hole 125 (see Figure 9 ) is formed on the lower side and is used to abut the bottom plate 11. A plurality of first connecting holes 123 are formed through the step surface of the mounting step 122, and the first bolts pass through the first connecting holes 123 and are connected with the first threaded holes 111 to fix the left side plate 12c and the right side plate 12d on the bottom plate 11. The extending directions of the first connecting holes 123 and the second connecting holes 124 are both the thickness directions of the left side plate 12c (or the right side plate 12d). The extending direction of the second threaded hole 125 is perpendicular to the thickness direction of the front side plate 12a (or the rear side plate 12b).

[0053] Referring to Figure 3 , Figure 9 and Figure 10 , the upper and lower sides of the front side plate 12a are both stepped. The step formed on the upper side is called a positioning step 121 and is used to abut the top plate 15. The lower side also forms a mounting step 122 and is used to cooperate with the bottom plate 11 to fix the front side plate 12a on the bottom plate 11.

[0054] Referring to Figure 3 and Figure 9 , the upper and lower sides of the rear side plate 12b are also both stepped. The step formed on the upper side is called a positioning step 121 and is used to abut the top plate 15. The lower side also forms a mounting step 122 and is used to cooperate with the bottom plate 11 to fix the rear side plate 12b on the bottom plate 11.

[0055] Figure 3 In addition, the front side plate 12a and the rear side plate 12b are both provided with mounting holes 127, and the mounting core column 13 is coaxially arranged in the two mounting holes 127 (see Figure 1 and Figure 2 ) to support the coil body (not shown). In addition, the positioning hole 128 for mounting the bushing 14 is formed on the front side plate 12a (see Figure 10 ).

[0056] The top ends of the front side plate 12a and the rear side plate 12b are also provided with first lifting holes 126 for cooperation with the lifting equipment to facilitate lifting and moving the entire mold assembly.

[0057] Referring to Figure 11The inner side surfaces of the four side plates 12 and the bottom plate 11 are polished, and the front side plate 12a is provided with an arc-shaped edge 129 at the connection positions with the left side plate 12c and the right side plate 12d (the positions of the second threaded holes 125). Similarly, the rear side plate 12b is provided with an arc-shaped edge 129 at the connection positions with the left side plate 12c and the right side plate 12d. The inner side surface of the side plate 12 is smoothly connected, so that the surface of the cast transformer winding part is smooth, and the workload of polishing the surface of the cast transformer after casting and demolding is reduced.

[0058] As shown in Figure 12 , the bushing 14 is provided with a joint pouring cavity, which is in communication with the winding pouring cavity. The bushing 14 is provided with a positioning hole 128 which is inserted into the front side plate 12a. The bushing 14 is also provided with a threading hole 141 which can be used to lead out the terminal of the primary coil and the grounding wire.

[0059] As shown in Figures 1 to 3 , after the transformer is cast, part of the bushing 14 can form a boss which protrudes out of the outer surface of the front side plate 12a, and part of the threading hole 141 is directed in an oblique upward direction, which is convenient for the user to operate the wiring.

[0060] As shown in Figure 3 , the top plate 15 actually corresponds to the bottom of the transformer, and the top plate 15 is a leakage plate made of epoxy resin. A plurality of pouring holes 151 are uniformly distributed on the top plate 15, so that the epoxy resin can uniformly fall into the pouring cavity (the winding pouring cavity and the terminal pouring cavity) through the pouring holes 151. For example, in the embodiment, the top plate 15 is configured as a rectangular plate, and the plurality of pouring holes 151 are arranged in a rectangular array.

[0061] When the top plate 15 and the four side plates 12 are assembled to form the winding pouring cavity, the top of the front side plate 12a, the rear side plate 12b, the left side plate 12c and the right side plate 12d all protrude from the upper surface of the top plate 15 by a certain distance, which prevents the epoxy resin from flowing everywhere during pouring. Sealing washers or a layer of sealing glue are provided at the joints thereof, so as to prevent the leakage of the epoxy resin during pouring.

[0062] The winding of the transformer is wound on the framework, and the mounting core column 13 is inserted into the framework to support the framework. During the assembly of the mold, the mounting core column 13 is inserted through the front side plate 12a, the framework and then out of the rear side plate 12b, so as to keep the winding at a predetermined position in the winding pouring cavity.

[0063] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 , the output terminal mold 2 includes a connecting sleeve 21 and a double clamping plate 22. As shown in Figure 5The connecting sleeve 21 is sleeved outside the output terminal post. The two ends of the connecting sleeve 21 are configured in a stepped manner, so that the connecting sleeve 21 is formed in a cylindrical shape with a thick middle and thin ends. The stepped structure facilitates the formation of a stopper fit with the through holes formed in the connecting plate 23 and the double clamp plate 22.

[0064] The double clamp plate 22 is formed by two sub-clamp plates that are combined with each other. The surface of each sub-clamp plate is formed with a circular groove, and a through hole is formed in the bottom of the circular groove. The two sub-clamp plates are combined with each other at the four corners, and are fixed together by bolts and nuts, so as to form a complete body. The two circular grooves are combined to form a disc-shaped clamp cavity 221, and the two through holes are coaxially communicated with the clamp cavity 221. The double clamp plate 22 is connected to one end of the connecting sleeve 21 in the axial direction, and the sleeve hole of the connecting sleeve 21 connected to the clamp cavity 221 is communicated with each other, so as to form a terminal pouring cavity. The inner diameter of the clamp cavity 221 formed by the double clamp plate 22 is greater than the inner diameter of the sleeve hole of the connecting sleeve 21.

[0065] It can be understood that the connecting sleeve 21 is used to pour an insulating base post wrapped outside the output terminal post. The double clamp plate 22 is used to pour an insulating protruding disc wrapped outside the insulating base post, so as to further improve the voltage resistance performance of the transformer.

[0066] Further, the output terminal mold 2 can include a plurality of connecting sleeves 21 and a plurality of double clamp plates 22. For example, the double clamp plate 22 can be clamped between two adjacent connecting sleeves 21, and each clamp cavity 221 is communicated with the sleeve holes of the connecting sleeves 21 on both sides, so as to form a terminal pouring cavity.

[0067] In the embodiment, the connecting plate 23, the connecting sleeve 21, the double clamp plate 22 and the support plate 24 are arranged in sequence along the length direction of the output terminal post. Figure 4 and Figure 5 The support plate 24 and the connecting plate 23 are located at both ends, and a plurality of connecting sleeves 21 and a plurality of double clamp plates 22 are alternately arranged between the support plate 24 and the connecting plate 23.

[0068] The connecting plate 23 is used to connect the winding mold 1, and can be fixed to the bottom plate 11 of the winding mold 1 by a threaded fastener. The projection area of the support plate 24 in the horizontal plane is greater than the projection area of the connecting sleeve 21 or the double clamp plate 22. This is because the output terminal mold 2 is located at the bottom during pouring, and the stability of the entire mold during placement can be ensured by arranging a support plate 24 with a larger horizontal area. The support plate 24 can be directly clamped and fixed with the connecting sleeve 21, or the support plate 24 can be fixed to the connecting sleeve 21 by a connecting plate 23 and a threaded fastener.

[0069] In particular, a through hole is arranged in the middle of the support plate 24 to facilitate the extension of the output terminal post. To this end, the bottom surface of the support plate 24 (the side away from the connecting sleeve 21 and the double clamp plate 22) is also provided with a support foot to slightly raise the plate surface portion of the support plate 24, facilitating the extension of the terminal post.

[0070] After the number of the connecting sleeve 21 and the double clamp plate 22 of the output terminal mold 2 is determined, the connecting sleeve 21, the double clamp plate 22 and the connecting plate 23 are assembled and then welded to be integrated. Then, the two terminal mold shells with the same structure are obtained by symmetrical cutting, and the terminal mold 2 is obtained, which is convenient for installation and disassembly. Although there is a gap after cutting, the distance is not too large, and the sealing can be achieved by filling sealant at the joint.

[0071] When the mold is assembled, the connecting plate 23 at the top is connected with the winding mold 1 through screws or other fasteners; and the connecting plate 23 at the bottom is connected and fixed with the support plate 24 through screws or other fasteners.

[0072] The specific use process of the utility model is as follows:

[0073] 1. Assemble the output terminal mold 2:

[0074] First, place the support plate 24 on the ground, then fix and install the two sub-housing assemblies of the output terminal mold 2. And seal the joints with gaskets or sealant to prevent the epoxy resin from leaking from the joints.

[0075] 2. Assemble the winding mold 1:

[0076] First, the two split plates 113 are closed together to form a complete bottom plate 11, and the bottom plate 11 is placed on the assembly workbench.

[0077] Then, the mounting step 122 on the front side plate 12a is clamped with the edge of the bottom plate 11, and then the first bolt is used to pass through the first connecting hole 123 and is screwed with the first threaded hole 111 to fix the front side plate 12a on the bottom plate 11. Similarly, the rear side plate 12b, the left side plate 12c and the right side plate 12d are fixed and installed on the bottom plate 11 in the same way.

[0078] Then, the second bolt is used to pass through the second connecting hole 124 and is screwed with the second threaded hole 125 to connect the front side plate 12a, the rear side plate 12b, the left side plate 12c and the right side plate 12d to each other.

[0079] 3. Combine the output terminal mold 2 and the winding mold 1:

[0080] The side plates 12 and the bottom plate 11 that have been assembled together are hoisted up using the hooks to hook the first hoisting holes 126 on the front side plate 12a and the rear side plate 12b, and are moved above the output terminal mold 2. The side plates 12 and the bottom plate 11 are then slowly placed on the connecting plate 23, and the overcurrent holes 112 are coaxially butted against the through holes of the connecting plate 23. Then the bolts are screwed through the through holes provided at the four corners of the connecting plate 23 and are screwed with the threaded holes provided on the lower plate surface of the bottom plate 11, so as to fix the output terminal mold 2 and the bottom plate 11 together. At the same time, the bushings 14 are installed in the positioning holes 128.

[0081] 4. Placing the winding:

[0082] The winding is hoisted up and moved above the winding pouring cavity, and then the two terminal posts of the output end are passed through the overcurrent holes 112 and extended into the terminal pouring cavity, and then the front ends of the two terminal posts are sealingly inserted into the small holes provided at the bottom of the counterbore of the support plate 24, so that the front ends of the terminal posts are exposed at the top of the poured insulating column, facilitating the subsequent external connection of the load. At the same time, the terminal of the winding is passed through the wire hole 141 of the bushing 14, so as to be connected to the input power source in the subsequent process.

[0083] Finally, the winding is slowly lowered into the winding pouring cavity, and at the same time, the installation core column 13 is sequentially passed through the front side plate 12a, the coil and the rear side plate 12b, so that the coil is stably placed in the winding pouring cavity.

[0084] 5. Pouring epoxy resin:

[0085] The top plate 15 is covered, and then the epoxy resin is poured into the mold through the pouring hole 151, and is cooled and solidified for a period of time.

[0086] 6. Disassembling the mold:

[0087] After the cooling and solidification for the set time, the hoisting rope is passed through the second hoisting hole 131 on the installation core column 13, so as to hoist up the entire mold, and then the mold components are sequentially disassembled. Then the poured voltage is hoisted and placed on the ground, and then the installation core column 13 is disassembled. Thus, the pouring work of the transformer is completed, and the transformer can be transported to the next work area for subsequent processing.

[0088] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "if' can be construed to mean "when" or "upon" or "in response to the occurrence of" in addition to "in response to the fulfillment or lapse of" unless otherwise indicated.

[0089] While the application has been illustrated and described in typical embodiments, it is not intended to be limited to the details shown, since various modifications and substitutions can be made without departing in any way from the spirit of the present application. As various changes could be made in the above constructions, methods, compositions, and order of elements within the application, it is intended that all such changes only be within the scope of the application claimed. It will be appreciated that details are given by way of example and that variations are possible without departing from the spirit of the application which is defined by the appended claims and their equivalents.

Claims

1. A casting mold for integral molding of a transformer, characterized in that, The winding mold (1) comprises a top plate (15), a bottom plate (11), a plurality of side plates (12) surrounding the bottom plate (11), and a mounting core column (13), a winding pouring cavity with a top opening is formed between each side plate (12) and the bottom plate (11), and the top plate (15) is arranged at the cavity opening of the winding pouring cavity; the mounting core column (13) is arranged in the winding pouring cavity and is sealingly connected to the side plate (12) to support the coil body of the transformer and suspend the coil body in the winding pouring cavity during pouring; the bottom plate (11) is provided with a flow hole (112) for the output terminal stud to pass through; and an output terminal mold (2) located outside the winding pouring cavity and sealingly connected to the bottom plate (11), the output terminal mold (2) forms a terminal pouring cavity, and the terminal pouring cavity is communicated with the winding pouring cavity through the flow hole (112). The top plate (15) is arranged at a position away from the upper edge of the side plate (12) by a predetermined distance, and a plurality of pouring holes (151) for pouring a solidifiable insulating liquid are formed in the top plate (15).

2. The pouring mold for integrally molding a transformer according to claim 1, characterized by The inner side plate surface of the two oppositely arranged side plates (12) is provided with a positioning step (121) near the upper edge, and the top plate (15) overlaps the two oppositely arranged positioning steps (121) to cover the cavity opening of the winding pouring cavity.

3. The casting mold for integrally molding a transformer according to claim 2, characterized in that, The side plate (12) is provided with a first lifting hole (126) near the upper edge for lifting; and / or the center of the mounting core column (13) is provided with a second lifting hole (131).

4. The pouring mold for integrally molding a transformer according to claim 1, characterized in that, The inner side plate surface of the bottom plate (11) facing the winding pouring cavity is further provided with at least one annular groove (115) coaxial with the flow hole (112), and the annular groove (115) is used for pouring an insulating protrusion on the outer surface of the winding pouring body; and / or the bottom plate (11) is connected by two groups of structureally identical sub-plates (113), and the flow hole (112) is formed by two half-circular holes.

5. The pouring mold for integrally molding a transformer according to claim 1, characterized in that, The transition between the inner side plate surfaces of the two adjacent side plates (12) is configured as a smooth transition surface.

6. The casting mold for integrally forming a transformer according to Claim 1, wherein The bottom inner edge of the side plate (12) is provided with a mounting step (122), the shoulder of the mounting step (122) overlaps the outer edge of the bottom plate (11) downward; a plurality of first connecting holes (123) are formed in the step surface of the mounting step (122), and a plurality of first threaded holes (111) matched with the first connecting holes (123) are formed in the outer side surface of the bottom plate (11), first bolts pass through the first connecting holes (123) and are connected with the first threaded holes (111) to fixedly mount the side plate (12) on the bottom plate (11).

7. The casting mold for integrally forming a transformer according to any one of claims 1 to 6, characterized in that, ​ 8. The casting mold for integrally forming a transformer according to claim 7, characterized in that, One of the two adjacent side plates (12) is provided with a clamping step (1210) at which a second connecting hole (124) is formed, and the other of the two adjacent side plates (12) is provided with a second threaded hole (125), a second bolt passing through the second connecting hole (124) and being connected with the second threaded hole (125) to fix the adjacent side plates (12) to each other.

9. The casting mold for integrally molding a transformer according to Claim 8, wherein A threading hole (141) through which a winding input end passes is formed in the side plate (12), a positioning hole (128) is formed in the side plate (12) at the winding input end, a bushing (14) for pouring a winding input end connector is sealingly connected in the positioning hole (128), a connector pouring cavity in the bushing (14) is in communication with the winding pouring cavity, and the threading hole (141) is formed in the bushing (14).

10. The casting mold for integrally forming a transformer according to any one of claims 1 to 6, characterized by The output terminal mold (2) comprises a connecting sleeve (21) and a double clamp plate (22), the connecting sleeve (21) is used for sleeving an output terminal post to pour an insulating base post; the double clamp plate (22) is connected to an axial end of the connecting sleeve (21) and comprises two sub-clamp plates which are closed to form a disc-shaped clamping cavity (221) inside, the clamping cavity (221) and a sleeve hole of the connecting sleeve (21) are in communication to form the terminal pouring cavity, and an inner diameter of the clamping cavity (221) is greater than an inner diameter of the sleeve hole; and / or the output terminal mold (2) is formed by closing and splicing two groups of terminal mold shells with the same structure.

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