Split type voltage transformer
By adopting a separate-packaged voltage transformer, using a combined housing and removable insulating filler, the existing voltage transformer housing has solved the problems of high processing costs and difficult maintenance, achieving more efficient assembly and lower maintenance costs.
Patent Information
- Application Number
- CN202420886545.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The shell processing costs of existing voltage transformers are high and difficult to repair in the later stage.
With a separate package design, the housing is set as a combination, including a removable base, shell cover, protective shell and umbrella skirt sheath, which can be assembled and fixed by the assembly and fixation of these components to improve assembly efficiency and reduce costs.
It improves the assembly efficiency and cost-effectiveness of voltage transformers, while reducing the difficulty of repair and convenience of later repairs.
Smart Images
Figure CN222619544U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of voltage transformers, and in particular to a sub-assembly type voltage transformer. Background Art
[0002] Voltage transformer plays an important role in the power system. It is mainly used to obtain the voltage information of the electrical primary circuit from secondary equipment such as measuring instruments and relay protection. It is a device that converts high voltage into low voltage in proportion, so that the voltage signal can be recognized and processed by measuring instruments and protection devices.
[0003] In the related art, a voltage transformer usually includes a shell and a transformer assembly located inside the shell, the transformer assembly includes an iron core, a primary coil wound on the iron core and a secondary coil wound on the iron core, and a corresponding insulating filler is also installed inside the shell, wherein the insulating filler is usually epoxy resin; during the operation of the voltage transformer, when a voltage is applied to the primary winding, the iron core generates magnetic flux, and according to the law of electromagnetic induction, a secondary voltage is generated in the secondary winding; by changing the number of turns of the primary or secondary winding, different primary voltage and secondary voltage ratios can be generated.
[0004] Since the housing of the voltage transformer and the internal insulating filler (such as epoxy resin) are processed in one piece, this process requires precise mold design and manufacturing, as well as strict control of molding parameters (such as temperature, pressure and time). This high degree of manufacturing precision undoubtedly increases the complexity and difficulty of production, which may lead to an increase in production costs. In addition, once the one-piece transformer housing is damaged or fails, due to the integrity of its structure, the work of repairing and replacing it may become relatively difficult, and there is room for improvement. Utility Model Content
[0005] The purpose of the present application is to provide a separately installed voltage transformer to solve the problem in the above-mentioned related technologies that the shell processing cost of the voltage transformer is high and the subsequent maintenance is difficult.
[0006] The present application provides a subassembly type voltage transformer adopts the following technical solution:
[0007] A separately installed voltage transformer comprises a shell, a transformer assembly in the shell, and an insulating filler covering the transformer assembly; the insulating filler comprises a main body and a protrusion arranged on the main body, and a connecting portion for connecting an external cable to the transformer assembly is arranged on the side of the main body; the shell comprises a base for the main body to be placed in, a shell cover fixed on the base, a positioning through hole for the protrusion to pass through is opened on the shell cover, an umbrella skirt sheath mounted on the outside of the protrusion is provided on the shell cover, and a protective shell mounted on the side of the base to be mounted on the outside of the connecting portion.
[0008] By adopting the above technical solution, the outer shell is arranged to be combined. When the outer shell and the insulating filler are assembled and fixed, the main body is placed in the base in advance, so that the connecting part on the main body is inserted into the interior of the protective shell, and then the shell cover is installed on the base, and at the same time, the protrusion passes through the positioning through hole and protrudes to the outside of the shell cover, and then the protective shell is installed on the outer periphery of the protrusion; compared with the background technology in which the outer shell and the insulating filler are arranged as one piece, the assembly efficiency in this application is higher and the cost is lower.
[0009] Optionally, a limiting convex ring is provided at an opening edge of the base facing the shell cover, and a limiting ring groove for inserting the limiting convex ring is opened on the base.
[0010] By adopting the above technical solution, when the base and the shell cover are assembled and fixed, due to the matching setting of the limiting protrusion and the limiting ring groove, the shell cover is pre-installed on the top of the base, and the limiting protrusion is inserted into the corresponding limiting ring groove, and finally the connection between the base and the shell cover is further fixed, thereby reducing the possibility of external dust or impurities entering the interior of the shell through the gap between the limiting protrusion and the limiting ring groove, and also improving the assembly stability of the base and the shell cover.
[0011] Optionally, the shell cover is provided with a positioning convex ring at an opening edge of the positioning through hole away from the base, and the umbrella skirt sheath is provided with a positioning ring groove for inserting the positioning convex ring.
[0012] By adopting the above technical solution, during the assembly process of the shed cover and the shell cover, due to the matching arrangement of the positioning protruding ring and the positioning ring groove, the shed cover is installed on the outer periphery of the protruding portion, and at the same time, the positioning protruding ring on the shell cover is inserted into the corresponding positioning ring groove, and then the connection between the shell cover and the shed cover is further fixed.
[0013] Optionally, the shell cover is provided with a first retaining ring on its outer circumference close to the base, and the base is provided with a second retaining ring on its outer circumference close to the shell cover.
[0014] By adopting the above technical solution, due to the coordinated arrangement of the first retaining ring and the second retaining ring, the connection between the shell cover and the base is protected, the possibility of external dust or other impurities adhering thereto is reduced, and the protection performance of the connection between the shell cover and the base is improved.
[0015] Optionally, the umbrella skirt sheath is provided with a third retaining ring on its outer circumference close to the shell cover.
[0016] By adopting the above technical solution, due to the setting of the third retaining ring, the third retaining ring is used to protect the connection between the umbrella skirt sheath and the shell cover, reducing the possibility of external dust or impurities adhering thereto, and enhancing the protection performance of the connection.
[0017] Optionally, an access cavity is provided on the connection portion, a plurality of connection sockets are provided on the inner wall of the access cavity, and a barrier sheet is provided inside the access cavity.
[0018] By adopting the above technical solution, the barrier sheet is used to protect the connection socket inside the access cavity.
[0019] Optionally, the barrier sheet is provided with a limiting through hole for the socket to be embedded.
[0020] By adopting the above technical solution, due to the opening of the limit through hole on the barrier piece, the protruding portion of the connector is embedded and fixed inside the limit through hole, thereby further improving the installation stability of the barrier piece inside the access cavity.
[0021] Optionally, the base, shell cover, protective shell and umbrella skirt sheath are all made of silicone.
[0022] By adopting the above technical solution, the silicone has excellent insulation performance, can effectively isolate the electrical parts, and improve the safety performance of the voltage transformer after the assembly is completed.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. Due to the combined setting of the shell, when the shell and the insulating filler are assembled and fixed, the main body is placed in the base in advance, the connecting part on the main body is inserted into the inside of the protective shell, and then the shell cover is installed on the base, and at the same time, the protrusion passes through the positioning through hole and protrudes outside the shell cover, and then the protective shell is installed on the outer periphery of the protrusion; the assembly efficiency of the shell and the insulating filler is improved, and the corresponding assembly cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;
[0027] Figure 2 is a schematic diagram of the explosion structure of an embodiment of the present application;
[0028] Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present application;
[0029] Figure 4 yes Figure 3 A magnified schematic diagram of part A;
[0030] Figure 5 yes Figure 3 A magnified schematic diagram of part B;
[0031] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the embodiment of the present application embodying the installation and coordination of the barrier sheet.
[0032] In the figure, 1, outer shell; 11, base; 111, protective shell; 112, limiting convex ring; 113, second retaining ring; 12, shell cover; 121, positioning through hole; 122, limiting ring groove; 123, first retaining ring; 124, positioning convex ring; 13, umbrella skirt sheath; 131, positioning ring groove; 132, third retaining ring; 14, barrier sheet; 141, limiting through hole; 2, insulating filling piece; 21, protrusion; 22, connecting part; 221, access cavity; 222, connecting socket; 23, main body. DETAILED DESCRIPTION
[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.
[0034] Example:
[0035] Reference Figure 1 and Figure 2 A subassembly type voltage transformer comprises a housing 1, a transformer assembly (not shown) in the housing 1, and an insulating filler 2 covering the transformer assembly; wherein the insulating filler 2 is made of epoxy resin, comprises a main body 23 and two protrusions 21 formed on the main body 23, and a connecting portion 22 for connecting an external cable to the transformer assembly is formed on the side of the main body 23, and the main body 23, the protrusions 21 and the connecting portion 22 are integrally injection molded;
[0036] The outer shell 1 includes a base 11 for the main body 23 to be placed, and a shell cover 12 fixedly arranged on the base 11. The shell cover 12 is provided with two positioning through holes 121 for the two protrusions 21 to pass through. The shell cover 12 is provided with an umbrella skirt sheath 13 sleeved on the outside of the protrusions 21, and a protective shell 111 sleeved on the outside of the connecting part 22 is provided on the side of the base 11.
[0037] Reference Figure 2 and Figure 3 The base 11, the shell cover 12, the protective shell 111 and the umbrella skirt sheath 13 are all made of silicone. Silicone has excellent insulation properties, can effectively isolate the electrical parts, and improve the safety of the transformer. In addition, silicone also has good chemical stability and is not easily affected by chemical substances, thereby extending the service life of the transformer.
[0038] Reference Figure 3 and Figure 4A limiting convex ring 112 is formed on the opening edge of the base 11 facing the shell cover 12, and a limiting ring groove 122 is opened on the base 11 for inserting the limiting convex ring 112; when the base 11 and the shell cover 12 are assembled and fixed, the shell cover 12 is installed above the base 11, and the limiting convex ring 112 is inserted into the corresponding limiting ring groove 122, and then silicone rubber glue is used to further fill the gap between the limiting convex ring 112 and the limiting ring groove 122, thereby realizing the assembly and fixation of the base 11 and the shell cover 12.
[0039] Reference Figure 3 and Figure 4 The shell cover 12 is formed with a first retaining ring 123 on its outer periphery close to the base 11, and the base 11 is formed with a second retaining ring 113 on its outer periphery close to the shell cover 12; the first retaining ring 123 and the shell cover 12 are integrally injection molded, and the base 11, the limiting convex ring 112 and the second retaining ring 113 are integrally injection molded; through the installation and arrangement of the first retaining ring 123 and the second retaining ring 113, the possibility of external dust adhering to the shell cover 12 and the abutting connection is reduced.
[0040] Reference Figure 3 and Figure 5 The shell cover 12 is formed with a positioning convex ring 124 at the opening edge of the positioning through hole 121 away from the base 11, and the shed sheath 13 is provided with a positioning ring groove 131 for inserting the positioning convex ring 124; the shed sheath 13 is formed with a third retaining ring 132 on its outer periphery close to the shell cover 12, wherein the positioning convex ring 124 and the third retaining ring 132 are both made of silicone, the shell cover 12 and the positioning convex ring 124 are integrally formed, and the shed sheath 13 and the third retaining ring 132 are integrally formed;
[0041] During the assembly process of the shed sheath 13 and the shell cover 12, the shed sheath 13 is installed on the outer periphery of the protrusion 21, and at the same time, the positioning protruding ring 124 on the shell cover 12 is inserted into the positioning ring groove 131 on the shed sheath 13, and silicone rubber glue is used to further fill the gap between the positioning protruding ring 124 and the positioning ring groove 131, so as to realize the assembly and fixation of the shed sheath 13 and the shell cover 12.
[0042] Reference Figure 6 The connecting portion 22 is provided with an access cavity 221, and the connecting portion 22 is provided with a plurality of sockets 222 on the inner wall of the access cavity 221. The sockets 222 are conventional small connector structures, which are connected to the internal transformer components and will not be described in detail here; the connecting portion 22 is provided with a barrier sheet 14 inside the access cavity 221, wherein the barrier sheet 14 is made of silicone material, and a limiting through hole 141 is provided on the barrier sheet 14 for the sockets 222 to be embedded, and the barrier sheet 14 is used to protect the outward side of the connecting portion 22;
[0043] During the installation of the barrier sheet 14 , silicone rubber glue is first applied to the side of the barrier sheet 14 facing the connector, and then the barrier sheet 14 is fixed to the inner wall of the access cavity 221 , while the protrusions 21 of the connector 222 are embedded in the corresponding limiting through holes 141 on the barrier sheet 14 .
[0044] The implementation principle of the embodiment of the present application is:
[0045] During the assembly process of the shell 1 and the insulating filler 2, the main body 23 is placed in the base 11 in advance, and then the shell cover 12 is installed on the base 11, and at the same time, the protrusion 21 passes through the positioning through hole 121 and protrudes from the outside of the shell cover 12, and then the umbrella skirt sheath 13 is installed on the outer periphery of the protrusion 21; then, silicone rubber glue is used to fix the connection between the base 11 and the shell cover 12, and the shell cover 12 and the umbrella skirt sheath 13; finally, the barrier sheet 14 is also fixed to the inner wall of the access cavity 221 by silicone rubber glue.
[0046] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "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.
[0047] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A subassembly type voltage transformer, characterized in that: The invention comprises a housing (1), a transformer assembly located in the housing (1), and an insulating filler (2) covering the transformer assembly; the insulating filler (2) comprises a main body (23) and a protruding portion (21) arranged on the main body (23); a connecting portion (22) for connecting an external cable to the transformer assembly is arranged on a side surface of the main body (23); The housing (1) comprises a base (11) for a main body (23) to be placed in, and a shell cover (12) fixed on the base (11); a positioning through hole (121) for the protrusion (21) to pass through is provided on the shell cover (12); an umbrella skirt sheath (13) sleeved on the outside of the protrusion (21) is provided on the shell cover (12); and a protective shell (111) sleeved on the outside of the connecting part (22) is provided on the side surface of the base (11).
2. A separately installed voltage transformer according to claim 1, characterized in that: A limiting convex ring (112) is provided at the opening edge of the base (11) facing the shell cover (12), and a limiting ring groove (122) for the limiting convex ring (112) to be inserted is provided on the base (11).
3. A separately installed voltage transformer according to claim 1, characterized in that: The shell cover (12) is provided with a positioning convex ring (124) at the opening edge of the positioning through hole (121) away from the base (11), and the shed sheath (13) is provided with a positioning ring groove (131) for the positioning convex ring (124) to be inserted.
4. A separately installed voltage transformer according to claim 1, characterized in that: The shell cover (12) is provided with a first retaining ring (123) on its outer periphery close to the base (11), and the base (11) is provided with a second retaining ring (113) on its outer periphery close to the shell cover (12).
5. A separately installed voltage transformer according to claim 1, characterized in that: The shed sheath (13) is provided with a third retaining ring (132) on its outer periphery close to the shell cover (12).
6. A separately installed voltage transformer according to claim 1, characterized in that: The connecting portion (22) is provided with an access cavity (221), the connecting portion (22) is provided with a plurality of connection sockets (222) on the inner wall of the access cavity (221), and a barrier sheet (14) is provided inside the access cavity (221).
7. A separately installed voltage transformer according to claim 6, characterized in that: The barrier sheet (14) is provided with a limiting through hole (141) for the socket (222) to be embedded.
8. A separately installed voltage transformer according to claim 1, characterized in that: The base (11), the shell cover (12), the protective shell (111) and the umbrella skirt sheath (13) are all made of silicone material.