Through-wall type current transformer mold

Abstract

The utility model relates to a through-wall type current transformer mould which comprises an upper mould, a middle mould and a lower mould, the lower surface of the upper mould is concaved inwards to form a first cavity, the upper surface of the lower mould is concaved inwards to form a second cavity, and copper bar clamping plates are fixed in the first cavity and the second cavity. The shape of the first cavity and the shape of the second cavity are the same as the shape of the copper bar clamping plate, the copper bar clamping plate comprises a first clamping plate and a second clamping plate, and a cavity formed by splicing the first clamping plate and the second clamping plate is matched with the shape of a primary copper bar of the through-wall current transformer. By utilizing the through-wall current transformer mold designed by the utility model, the problems that in the prior art, for mold forming of a through-wall current transformer, manual mold sealing and pouring are generally adopted after a primary copper bar is exposed and fixed, and the position of the primary copper bar is controlled depending on manual experience during manual mold sealing and pouring, so that the mold sealing and pouring efficiency is high, and the production cost is low can be solved. The problems of low mold sealing and pouring efficiency, mold leakage, difficulty in demolding and serious damage to the primary copper bar exist in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a through-the-wall current transformer mould. Background Art

[0002] In the prior art, for the mold forming of the through-the-wall current transformer, the primary copper busbar is usually exposed and fixed, and then the mold is sealed and poured manually. The manual mold sealing and pouring relies on manual experience to control the position of the primary copper busbar. Not only is there a problem of low mold sealing and pouring efficiency, but there are also problems such as mold leakage and difficulty in demolding, which can seriously damage the primary copper busbar.

[0003] Therefore, the prior art has defects and needs to be improved and developed. Summary of the invention

[0004] The embodiment of the utility model provides a through-the-wall current transformer mold, which is used to solve the problem in the prior art that, for the mold forming of the through-the-wall current transformer, a primary copper busbar is usually exposed and fixed, and then the mold is sealed and poured manually. The manual mold sealing and pouring relies on manual experience to control the position of the primary copper busbar, which not only has the problem of low mold sealing and pouring efficiency, but also has the problem of mold leakage, difficulty in demoulding, and thus serious damage to the primary copper busbar.

[0005] An embodiment of the utility model provides a through-wall current transformer mold, a through-wall current transformer mold, which is used for casting and molding of the through-wall current transformer, and includes an upper mold, a middle mold and a lower mold. The cavity formed by the assembly of the upper mold, the middle mold and the lower mold is adapted to the shape of the through-wall current transformer. The lower surface of the upper mold is recessed inwardly with a first cavity, and the upper surface of the lower mold is recessed inwardly with a second cavity. Copper busbar clamps are fixed in the first cavity and the second cavity. The shapes of the first cavity and the second cavity are the same as those of the copper busbar clamps. The copper busbar clamps include a first clamp and a second clamp that are assembled together. The cavity formed by the assembly of the first clamp and the second clamp is adapted to the shape of the primary copper busbar of the through-wall current transformer.

[0006] Furthermore, the first clamping plate includes a mounting portion and a splicing portion perpendicular to each other, and corresponding positioning holes are provided between the top of the mounting portion and the first cavity, and when the copper bar clamping plate is fixed in the first cavity, a positioning pin is inserted in the positioning hole; corresponding positioning holes are also provided between the top of the mounting portion and the second cavity, and when the copper bar clamping plate is fixed in the second cavity, the positioning pin is also inserted in the positioning hole; the splicing portion is recessed inwardly with a third cavity, and the concave surface of the third cavity protrudes outwardly with a first boss; the splicing portion is provided with a third positioning hole on the surface for contacting the second clamping plate; the splicing portion is used to contact the edge of the second clamping plate A demoulding groove is provided on the edge, and when the first clamping plate and the second clamping plate are spliced ​​together, the demoulding groove is pried to separate the first clamping plate and the second clamping plate; the second clamping plate is recessed with a fourth cavity inwardly, and the concave surface of the fourth cavity protrudes outwardly with a second boss corresponding to the position of the first boss, the axis of the first boss, the axis of the second boss and the axis of the mounting hole of the primary copper busbar are colinear, and the outer peripheral contour of the first boss and the second boss is adapted to the inner contour of the mounting hole; the second clamping plate is used to contact the splicing part, and a third boss corresponding to the position of the third positioning hole is protruded outwardly on the surface, and the shape of the third boss is adapted to the shape of the third positioning hole.

[0007] Furthermore, the upper mold is provided with at least one pouring hole, and the pouring hole passes through the upper and lower surfaces of the upper mold.

[0008] Furthermore, the intermediate mold includes a first mold, a second mold and a third mold. When the first mold, the second mold and the third mold are assembled, the first mold and the second mold are symmetrical on the left and right, and the shape after the first mold and the second mold are assembled is symmetrical on the top and bottom of the third mold; the edge of the second mold for contacting the first mold is also provided with the demolding groove, and when the first mold and the second mold are assembled, the demolding groove is pried to separate the first mold and the second mold.

[0009] Furthermore, a support rod is fixed on the lower surface of the lower mold, and the support rod is used to place the through-the-wall current transformer mold on the ground.

[0010] Furthermore, the edge of the upper mold for contacting the middle mold is also provided with the demoulding groove, and when the upper mold and the middle mold are assembled, the demoulding groove is pried to separate the upper mold from the middle mold.

[0011] Furthermore, the edge of the lower mold for contacting the middle mold is also provided with the demoulding groove, and when the lower mold and the middle mold are assembled, the demoulding groove is pried to separate the lower mold from the middle mold.

[0012] Furthermore, the positioning holes are provided at the joints between the upper mold and the first mold, the joints between the upper mold and the second mold, the joints between the first mold and the second mold, the joints between the first mold and the third mold, the joints between the second mold and the third mold, and the joints between the third mold and the lower mold. When the upper mold, the first mold, the second mold, the third mold and the lower mold are assembled, the positioning pins are provided in the positioning holes.

[0013] Beneficial effects:

[0014] It can be seen from the above technical solutions that the utility model provides a through-the-wall current transformer mold. The primary copper busbar of the through-the-wall current transformer is fixed by designing a copper busbar clamp. When the through-the-wall current transformer is molded, the position of the primary copper busbar does not shift, and direct and rapid casting is performed without relying on manual experience, thereby improving the molding efficiency of the through-the-wall current transformer mold. When the through-the-wall current transformer is demolded, because the copper busbar clamp is separately designed to fix the primary copper busbar, the casting material will not enter the copper busbar, and demolding is convenient. The through-the-wall current transformer mold provided by the utility model can save mold installation, casting, and demolding time.

[0015] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered to be part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0016] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are not drawn to scale according to actual reference objects. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the present invention will be described by way of example and with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a disassembled diagram of a through-the-wall current transformer mold in an embodiment of the present application.

[0019] Figure 2 This is a structural diagram of a through-the-wall current transformer mold after splicing in an embodiment of the present application.

[0020] Figure 3This is a top view of an upper mold of a through-the-wall current transformer mold in an embodiment of the present application.

[0021] Figure 4 This is a bottom view of an upper mold of a through-the-wall current transformer mold in an embodiment of the present application.

[0022] Figure 5 This is a structural diagram of a copper bar clamp of a through-the-wall current transformer mold in an embodiment of the present application.

[0023] Figure 6 This is a structural diagram of a first clamping plate of a through-the-wall current transformer mold in an embodiment of the present application.

[0024] Figure 7 This is a structural diagram of a second clamping plate of a through-the-wall current transformer mold in an embodiment of the present application.

[0025] Description of Figure Numbers:

[0026] Upper mold 1; pouring hole 101; first cavity 102; first mold 2; second mold 3; third mold 4; lower mold 5; support rod 6; copper bar clamping plate 7; installation part 701; splicing part 702; second clamping plate 703. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meaning understood by people with general skills in the field to which the present invention belongs.

[0028] The words "first", "second" and similar terms used in the patent specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form "a" or "an" shall not be construed as "a" or "an";

[0029] Words such as "one" or "the" and the like do not indicate a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before "include" or "comprise" include the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] In the prior art, due to the mold forming of the through-the-wall current transformer, the primary copper busbar is usually exposed and fixed, and then the mold is sealed and poured manually. The manual mold sealing and pouring relies on manual experience to control the position of the primary copper busbar. Not only is there a problem of low mold sealing and pouring efficiency, but there are also problems such as mold leakage and difficulty in demolding, which can seriously damage the primary copper busbar.

[0031] In view of this, the embodiment of the utility model provides a through-the-wall current transformer mold for casting and molding the through-the-wall current transformer, referring to Figure 1-2 , including an upper mold 1, a middle mold and a lower mold 5. The cavity after the upper mold 1, the middle mold and the lower mold 5 are assembled is adapted to the shape of the through-the-wall current transformer. Figure 4 The lower surface of the upper mold 1 is recessed with a first cavity 102, and the upper surface of the lower mold 5 is recessed with a second cavity. Copper bar clamps 7 are fixed in the first cavity 102 and the second cavity. The shapes of the first cavity 102 and the second cavity are the same as the shape of the copper bar clamp 7. The copper bar clamp 7 includes a first clamp and a second clamp 703 that are spliced ​​together. The cavity after the first clamp and the second clamp 703 are spliced ​​together is adapted to the shape of the primary copper bar of the through-the-wall current transformer.

[0032] In certain embodiments, reference Figure 5 to Figure 7The first clamping plate includes a mounting portion 701 and a splicing portion 702 which are perpendicular to each other. A corresponding positioning hole is provided between the top of the mounting portion 701 and the first cavity 102. When the copper bar clamping plate 7 is fixed in the first cavity 102, a positioning pin is inserted into the positioning hole; a corresponding positioning hole is also provided between the top of the mounting portion 701 and the second cavity. When the copper bar clamping plate 7 is fixed in the second cavity, a positioning pin is also inserted into the positioning hole; the splicing portion 702 is recessed inwardly to form a third cavity, and a first boss protrudes outwardly from the concave surface of the third cavity; a third positioning hole is provided on the surface of the splicing portion 702 for contacting the second clamping plate 703; the splicing portion 702 is used to contact A demoulding groove is provided on the edge of the second clamping plate 703. When the first clamping plate and the second clamping plate 703 are spliced ​​together, the demoulding groove is pried to separate the first clamping plate and the second clamping plate 703; the second clamping plate 703 is recessed inwardly with a fourth cavity, and the concave surface of the fourth cavity protrudes outwardly with a second boss corresponding to the position of the first boss, the axis of the first boss, the axis of the second boss and the axis of the mounting hole of the primary copper busbar are colinear, and the outer peripheral contour of the first boss and the second boss adapts to the inner contour of the mounting hole; the second clamping plate 703 is used to contact the splicing part 702, and a third boss corresponding to the position of the third positioning hole protrudes outward, and the shape of the third boss adapts to the shape of the third positioning hole.

[0033] The copper bar clamping plate 7 can be designed into different sizes according to the actual through-the-wall current transformers produced, and copper bar clamping plates 7 of different sizes can be clamped firmly after the first clamping plate and the second clamping plate 703 are spliced, so as to carry out subsequent molding and other processes. A through-the-wall current transformer mold is suitable for primary copper bars of different sizes, realizing one mold for multiple uses.

[0034] The mounting portion 701 and the splicing portion 702 are L-shaped, and the mounting portion 701 and the splicing portion 702 are integrally formed. When the first splint and the second splint 703 are spliced, the gap between the first splint and the second splint 703 adapts to the shape of the primary copper busbar. When the primary copper busbar is located in the gap between the first splint and the second splint 703, the casting material during pouring will not enter the gap, so it will not affect the subsequent demolding.

[0035] In certain embodiments, reference Figure 3-4 At least one pouring hole 101 is provided on the upper mold 1 , and the pouring hole 101 passes through the upper and lower surfaces of the upper mold 1 .

[0036] In some embodiments, the intermediate mold includes a first mold 2, a second mold 3 and a third mold 4. When the first mold 2, the second mold 3 and the third mold 4 are assembled, the first mold 2 and the second mold 3 are symmetrical on the left and right, and the shape after the first mold 2 and the second mold 3 are assembled is symmetrical on the top and bottom of the third mold 4; the second mold 3 is used to contact the edge of the first mold 2 and is also provided with a demolding groove. When the first mold 2 and the second mold 3 are assembled, the demolding groove is pried to separate the first mold 2 and the second mold 3.

[0037] In some embodiments, a support rod 6 is fixed on the lower surface of the lower mold 5, and the support rod 6 is used to place the through-the-wall current transformer mold on the ground.

[0038] The through-the-wall current transformer mold is supported by the support rod 6, and the casting material will not flow freely inside the mold, thereby finally achieving the purpose of convenient casting and good appearance of the product after demoulding.

[0039] In some embodiments, a demolding groove is also provided on the edge of the upper mold 1 for contacting the middle mold. When the upper mold 1 and the middle mold are assembled, the demolding groove is pried to separate the upper mold 1 from the middle mold.

[0040] In some embodiments, a demolding groove is also provided on the edge of the lower mold 5 for contacting the middle mold. When the lower mold 5 and the middle mold are assembled, the demolding groove is pried to separate the lower mold 5 from the middle mold.

[0041] In some embodiments, positioning holes are provided at the joints between the upper mold 1 and the first mold 2, the joints between the upper mold 1 and the second mold 3, the joints between the first mold 2 and the second mold 3, the joints between the first mold 2 and the third mold 4, the joints between the second mold 3 and the third mold 4, and the joints between the third mold 4 and the lower mold 5. When the upper mold 1, the first mold 2, the second mold 3, the third mold 4 and the lower mold 5 are assembled, positioning pins are provided in the positioning holes.

[0042] The positioning holes are set according to the conventional mold design. The positioning holes are also called installation holes. The purpose is to ensure the stable loading of the mold after the positioning pins are inserted.

[0043] Reference Figure 1-2 The joints between the upper mold 1 and the first mold 2, the joints between the upper mold 1 and the second mold 3, the joints between the first mold 2 and the second mold 3, the joints between the first mold 2 and the third mold 4, the joints between the second mold 3 and the third mold 4, and the joints between the third mold 4 and the lower mold 5 are all designed with outer edges extending outward to provide space for opening positioning holes, thereby realizing the splicing of the molds.

[0044] A through-the-wall current transformer mold designed by the utility model was used to conduct a comparative experiment with a manually cast mold. The maximum time for manual casting from mold loading, pouring to demolding is 65 minutes in total, while the maximum time for using a through-the-wall current transformer mold from mold loading, pouring to demolding is no more than 20 minutes, thereby achieving improved work efficiency, and is not dependent on manual experience, with a better degree of standardization. The obtained through-the-wall current transformer has high consistency, reduces product delivery time, has good product appearance and performance, and improves market competitiveness.

[0045] In summary, the utility model provides a through-the-wall current transformer mold, which fixes the primary copper bar of the through-the-wall current transformer by designing the copper bar clamping plate 7. When the through-the-wall current transformer is molded, the position of the primary copper bar does not shift, and it is directly and quickly cast without relying on manual experience, thereby improving the molding efficiency of the through-the-wall current transformer mold. When the through-the-wall current transformer is demoulded, because the copper bar clamping plate 7 is designed separately for the primary copper bar to fix it, the casting material will not enter the copper bar, and demoulding is convenient. Moreover, demoulding grooves are also designed between different molds, and the demoulding grooves are directly pried, so that demoulding is more convenient and fast, and demoulding is faster. In addition, according to the primary copper bars of different sizes, the first boss and the second boss at different positions can be designed. As long as the axis of the first boss and the second boss and the hole of the primary copper bar are ensured to be collinear, different copper bars can be adapted, and one mold can be used for multiple purposes. Therefore, by using the through-the-wall current transformer mold provided by the utility model, it is possible to save mold installation, casting, and demoulding time.

[0046] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A through-the-wall current transformer mold, used for casting and molding of the through-the-wall current transformer, comprising an upper mold, a middle mold and a lower mold, wherein the cavity after the upper mold, the middle mold and the lower mold are assembled is adapted to the shape of the through-the-wall current transformer, characterized in that: The lower surface of the upper mold is recessed with a first cavity, and the upper surface of the lower mold is recessed with a second cavity. Copper busbar clamps are fixed in the first cavity and the second cavity. The shapes of the first cavity and the second cavity are the same as the shape of the copper busbar clamp. The copper busbar clamp includes a first clamp and a second clamp that are spliced ​​together. The cavity formed by splicing the first clamp and the second clamp is adapted to the shape of the primary copper busbar of the through-the-wall current transformer.

2. A through-the-wall current transformer mold according to claim 1, characterized in that: The first clamping plate comprises a mounting portion and a splicing portion perpendicular to each other, and corresponding positioning holes are arranged between the top of the mounting portion and the first cavity, and a positioning pin is inserted into the positioning hole when the copper bar clamping plate is fixed in the first cavity; corresponding positioning holes are also arranged between the top of the mounting portion and the second cavity, and the positioning pin is also inserted into the positioning hole when the copper bar clamping plate is fixed in the second cavity; a third cavity is recessed inwardly in the splicing portion, and a first boss protrudes outwardly from the concave surface of the third cavity; a third positioning hole is opened on the surface of the splicing portion for contacting the second clamping plate; a splicing portion for contacting the edge of the second clamping plate is opened There is a demoulding groove, when the first clamping plate and the second clamping plate are spliced ​​together, the demoulding groove is pried to separate the first clamping plate and the second clamping plate; the second clamping plate is recessed inwardly with a fourth cavity, and the concave surface of the fourth cavity protrudes outwardly with a second boss corresponding to the position of the first boss, the axis of the first boss, the axis of the second boss and the axis of the mounting hole of the primary copper busbar are colinear, and the outer peripheral contour of the first boss and the second boss is adapted to the inner contour of the mounting hole; the second clamping plate is used to contact the splicing part, and a third boss corresponding to the position of the third positioning hole is protruded outwardly on the surface, and the shape of the third boss is adapted to the shape of the third positioning hole.

3. A through-the-wall current transformer mold according to claim 2, characterized in that: The upper mold is provided with at least one pouring hole, and the pouring hole passes through the upper and lower surfaces of the upper mold.

4. A through-the-wall current transformer mold according to claim 3, characterized in that: The intermediate mold includes a first mold, a second mold and a third mold. When the first mold, the second mold and the third mold are assembled, the first mold and the second mold are symmetrical on the left and right, and the shape after the first mold and the second mold are assembled is symmetrical on the top and bottom of the third mold; the edge of the second mold for contacting the first mold is also provided with the demolding groove, and when the first mold and the second mold are assembled, the demolding groove is pried to separate the first mold and the second mold.

5. A through-the-wall current transformer mold according to claim 4, characterized in that: A support rod is fixed on the lower surface of the lower mold, and the support rod is used to place the through-the-wall current transformer mold on the ground.

6. A through-the-wall current transformer mold according to claim 5, characterized in that: The edge of the upper mold for contacting the middle mold is also provided with the demoulding groove. When the upper mold and the middle mold are assembled, the demoulding groove is pried to separate the upper mold from the middle mold.

7. A through-the-wall current transformer mold according to claim 6, characterized in that: The edge of the lower mold for contacting the middle mold is also provided with the demoulding groove. When the lower mold and the middle mold are assembled, the demoulding groove is pried to separate the lower mold from the middle mold.

8. A through-the-wall current transformer mold according to claim 7, characterized in that: The positioning holes are provided at the joints between the upper mold and the first mold, the joints between the upper mold and the second mold, the joints between the first mold and the second mold, the joints between the first mold and the third mold, the joints between the second mold and the third mold, and the joints between the third mold and the lower mold. When the upper mold, the first mold, the second mold, the third mold and the lower mold are assembled, the positioning pins are provided in the positioning holes.

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