Voltage transformer structure

Abstract

The voltage transformer structure comprises a pouring body, and an iron core, a coil, a wiring board, a guide rod, a fuse and a rear seat sleeve which are arranged in the pouring body, the coil is sleeved on the iron core, the wiring board is fixedly connected to the coil, one end of the guide rod is fixedly connected to the wiring board, the other end of the guide rod is fixedly connected to the rear seat sleeve, and the rear seat sleeve, the guide rod and the wiring board form a mechanism for hoisting the coil; the rear end of the rear seat sleeve is provided with an opening communicated with the inner cavity, the pouring body forms an insulating cylinder communicated with the inner cavity of the rear seat sleeve, the insulating cylinder is provided with a fuse, and the fuse is simultaneously connected to the rear seat sleeve and is conductively connected with the coil through a guide rod and a wiring board. The rear seat sleeve, the guide rod and the wiring board are in hard connection with the coil, so that the coil can be hoisted, other hoisting mechanisms are not needed, the influence of other hoisting mechanisms on the electrical performance can be avoided, the assembly action is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mutual inductors, in particular to a voltage mutual inductor structure. Background Art

[0002] During the manufacturing of existing transformers with fuses, soft connection lifting is usually adopted, or the iron core and coil need to be lifted separately through inserts, or the coil and iron core are assembled through a support tube, and then cast, and then fuses, shielding nets, springs and other accessories are installed. The production process has many and complicated assembly parts, which is not conducive to production organization and has low efficiency. In addition, soft lifting and the setting of support tubes will affect the electrical performance of the transformer. Summary of the invention

[0003] The object of the present invention is to provide a voltage transformer structure, which has the advantages of reducing assembly actions, improving production efficiency and ensuring electrical performance.

[0004] In order to achieve the above object, the solution of the present invention is: A voltage transformer structure comprises a cast body and an iron core, a coil, a terminal block, a guide rod, a fuse and a rear seat cover arranged in the cast body; The coil is sleeved on the iron core, the terminal block is connected and fixed to the coil, one end of the guide rod is connected and fixed to the terminal block, and the other end is connected and fixed to the rear seat cover, and the rear seat cover, the guide rod and the terminal block constitute a mechanism for hoisting the coil; The rear end of the rear seat cover has an open connected inner cavity, the cast body is formed with an insulating cylinder connected to the inner cavity of the rear seat cover, the fuse is installed in the insulating cylinder, and the fuse is simultaneously connected to the rear seat cover and is conductively connected through a guide rod, a terminal block and a coil.

[0005] Furthermore, a spring is installed between the fuse and the rear seat cover, and a shielding net is provided on the periphery of the connecting end between the fuse and the rear seat cover.

[0006] Furthermore, one end of the shielding net is threadedly connected to the opening of the inner cavity of the rear seat cover, and is integrally cast and formed in the casting body along with the rear seat cover.

[0007] Furthermore, the fuse has a striker inside; the front end surface of the rear seat cover has a striker hole connected to the inner cavity, and the striker hole is located at the striker position of the fuse; the cast body has a striker channel connecting the striker hole and the outside.

[0008] Furthermore, a spring connecting groove is recessed on the front wall of the inner cavity of the rear seat cover, and the front end of the spring is clamped and crimped and fixed in the spring connecting groove.

[0009] Furthermore, the rear seat cover includes a circular cylinder seat and an arched connecting portion arranged below the circular cylinder seat; the inner cavity is formed in the circular cylinder seat; the arched connecting portion arches downward from the bottom of the circular cylinder seat, and a connecting groove is recessed at the bottom of the arched connecting portion; the guide rod has a connecting section installed in the connecting groove, the connecting section is welded and fixed to the connecting groove, and after welding, the connecting section maintains a smooth transition and non-pointed connection with the rear seat cover.

[0010] Furthermore, the connecting groove is a circular groove, and two groove edges of the circular groove are arc transitions.

[0011] Furthermore, the wiring board is attached and tied to the coil and is electrically connected to the coil; the guide rod is welded and fixed to the wiring board.

[0012] Furthermore, the guide rod is a hard metal conductive guide rod.

[0013] Furthermore, the cast body is provided with two annular iron cores arranged at intervals, and a group of coils is respectively sleeved on the upper part of each annular iron core; each group of coils is divided into a front half and a rear half; the rear seat covers are three arranged side by side on the left and right, and the two iron cores and the corresponding coils are respectively located below between the two rear seat covers; the guide rods include a middle guide rod and two side guide rods, and a terminal block is respectively provided on the front half and the rear half of each group of coils, and the terminal blocks on the two front halves are connected to the middle rear seat cover through the same middle guide rod, and the terminal blocks on the two rear halves are respectively connected to the rear seat covers on both sides through a side guide rod; the insulating tubes and fuses are three corresponding to the number of rear seat covers.

[0014] After adopting the above technical solution, the coil can be hoisted by using the rear seat cover, guide rod and terminal block to hard connect with the coil, without the need to use other hoisting mechanisms, and the influence of other hoisting mechanisms on electrical performance can also be avoided.

[0015] Specifically, in the industrial production process, the coil is first wound on the iron core, and then the terminal block, guide rod and rear seat cover are fixed on the coil, and the hoisting connection of the coil is also completed. That is, before casting, an inner core extending into the inner cavity can be inserted into the opening of the rear seat cover. At this time, the rear seat cover can be used to realize the hoisting and positioning of the coil, eliminating the need to use other hoisting mechanisms to hoist the coil, thereby reducing the assembly action; then the iron core is independently hoisted and then sent into the mold for casting, so that the casting body can be completely and quickly cast, and the casting body covers the iron core, coil, terminal block, guide rod and rear seat cover, and the provision of the inner core can facilitate the casting and molding of the insulating cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of an embodiment of the present invention; Figure 2is a cross-sectional view of an embodiment of the present invention; Figure 3 It is a partial structural exploded view of an embodiment of the present invention; Figure 4 It is a schematic diagram of the local structure of an embodiment of the present invention.

[0017] Explanation of reference numerals: cast body 1, insulating cylinder 11, striker channel 12, iron core 2, coil 3, front half 31, rear half 32, terminal block 4, guide rod 5, connecting section 51, middle guide rod 52, side guide rod 53, fuse 6, rear seat sleeve 7, opening 71, inner cavity 72, internal thread 73, striker hole 74, spring connecting groove 75, circular cylinder seat 76, arched connecting part 77, connecting groove 771, spring 8, shielding net 9, external thread 91. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] like Figures 1 to 4 As shown, a voltage transformer structure of this embodiment includes a cast body 1 and an iron core 2, a coil 3, a terminal block 4, a guide rod 5, a fuse 6 and a rear seat cover 7 arranged in the cast body 1; The coil 3 is sleeved on the iron core 2, the terminal block 4 is connected and fixed on the coil 3, one end of the guide rod 5 is connected and fixed to the terminal block 4, and the other end is connected and fixed to the rear seat cover 7, and the rear seat cover 7, the guide rod 5 and the terminal block 4 constitute a mechanism for hanging the coil 3; The rear end of the rear seat cover 7 has an opening 71 connected to the inner cavity 72, and the cast body 1 is formed with an insulating tube 11 connected to the inner cavity 72 of the rear seat cover 7. The fuse 6 is installed in the insulating tube 11, and the fuse 6 is simultaneously connected to the rear seat cover 7 and is conductively connected through the guide rod 5, the terminal block 4 and the coil 3.

[0020] Thus, in this embodiment, by using the rear seat cover 7, the guide rod 5 and the terminal block 4 to be hard-connected with the coil 3, the coil 3 can be hoisted without using other hoisting mechanisms, and the influence of other hoisting mechanisms on electrical performance can also be avoided.

[0021] Specifically, in the industrial batch production process, the coil 3 is wound on the iron core 2, and then the terminal block 4, the guide rod 5 and the rear seat cover 7 are fixed on the coil 3, and the hoisting connection of the coil 3 is also completed. That is, before casting, an inner core (not shown) extending into the inner cavity 72 can be inserted into the opening 71 of the rear seat cover 7. At this time, the rear seat cover 7 can be used to realize the hoisting positioning of the coil 3, eliminating the need to use other hoisting mechanisms to hoist the coil 3, thereby reducing the assembly action; and then the iron core 2 is independently hoisted and then sent into a mold (not shown) for casting, so that the casting body 1 can be completely and quickly cast, and the casting body 1 covers the iron core 2, the coil 3, the terminal block 4, the guide rod 5 and the rear seat cover 7, and the provision of the inner core can facilitate the casting and molding of the insulating tube 11.

[0022] like Figure 2 and Figure 3 In this embodiment, a spring 8 is installed between the fuse 6 and the rear seat cover 7, and a shielding net 9 is provided at the periphery of the connecting end of the fuse 6 and the rear seat cover 7, and the shielding net 9 is provided to achieve the function of shielding the electric field. Of course, the shielding net 9 can also be replaced by an electric field shielding member such as a voltage grading cover.

[0023] At the same time, one end of the shielding net 9 can be threadedly connected to the opening 71 of the inner cavity 72 of the rear seat cover 7, and can be integrally cast in the casting body 1 with the rear seat cover 7. Specifically, an external thread 91 can be provided at one end of the shielding net 9, and an internal thread 73 can be provided at the opening 71 of the rear seat cover 7, thereby, the shielding net 9 can be installed in advance in a front-loading manner, and then cast, and the assembly is more convenient.

[0024] In this embodiment, the spring 8 can be pre-installed in the inner cavity 72 of the rear seat cover 7 before pouring, and then pouring is performed. Then the fuse 6 can be installed from the insulating tube 11. The fuse 6 is easy and quick to install, which can improve product assembly efficiency.

[0025] In this embodiment, the fuse 6 has a striker (the fuse 6 is a prior art and is schematically drawn, and the internal structure and striker are not shown); the front end surface of the rear seat cover 7 has a striker hole 74 connected to the inner cavity 72, and the striker hole 74 is located at the striker position of the fuse 6; the cast body 1 has a striker channel 12 connecting the striker hole 74 and the outside. Therefore, it is convenient to realize the pop-up alarm function of the striker of the fuse 6, and it is convenient to quickly check the working status of the product when a product failure occurs.

[0026] See also Figure 4 In this embodiment, the front wall of the inner cavity 72 of the rear seat cover 7 may be concavely provided with a spring connection groove 75, and the front end of the spring 8 may be clamped and crimped and fixed in the spring connection groove 75. Specifically, the front end of the spring 8 may be riveted to the rear seat cover 7 through the striker hole 74 using a rivet (not shown), and of course other crimping methods may also be used.

[0027] like Figure 4 In this embodiment, the rear seat cover 7 includes a circular cylinder seat 76 and an arched connecting portion 77 arranged below the circular cylinder seat 76; specifically, the rear seat cover 7 can be in a water drop shape.

[0028] The inner cavity 72 is formed in the circular cylinder seat 76; the arched connecting portion 77 arches downward from the bottom of the circular cylinder seat 76, and a connecting groove 771 is recessed at the bottom of the arched connecting portion 77; the guide rod 5 has a connecting section 51 installed in the connecting groove 771, the connecting section 51 is welded and fixed to the connecting groove 771, and after welding, the connecting section 51 maintains a smooth transition and non-pointed connection with the rear seat cover 7.

[0029] The arched connecting portion 77 can be provided to prevent the rear seat cover 7 from being difficult to weld due to its small wall thickness. At the same time, a connecting groove 771 is provided on the arched connecting portion 77 to improve the welding fixing effect and the electrical performance. Specifically, the connecting groove 771 can accommodate part of the connecting section 51 and keep the connecting section 51 of the guide rod 5 and the rear seat cover 7 in a balanced connection, which can avoid excessive exposure of the local tip and avoid excessive concentration of the electric field distribution in one or several local areas, thereby affecting the partial discharge performance of the product, and can avoid excessive local discharge inside the product, ensure balanced electric field distribution, and improve the service life of the product.

[0030] In this embodiment, the connecting groove 771 is a circular groove, and the two groove edges of the circular groove are arc transitions, which can also avoid local tip exposure, ensure balanced electric field distribution, and ensure electrical performance.

[0031] like Figure 3 As shown, the terminal block 4 can be attached and tied to the coil 3 and electrically connected to the coil 3, and can be specifically tied with an insulating tape (not shown); and the guide rod 5 is welded and fixed to the terminal block 4. The guide rod 5 is a hard metal conductive guide rod 5, such as a copper rod.

[0032] In the present embodiment, the cast body 1 has two annular cores 2 arranged at intervals, and the upper part of each annular core 2 is respectively sleeved with a group of coils 3; each group of coils 3 is divided into a front half 31 and a rear half 32; the rear seat cover 7 is three arranged side by side, and the two cores 2 and the corresponding coils 3 are respectively located below the two rear seat covers 7; the guide rod 5 may include an intermediate guide rod 52 and two side guide rods 53, and a terminal block 4 is respectively provided on the front half 31 and the rear half 32 of each group of coils 3, and the terminal blocks 4 on the two front halves 31 are connected to the middle rear seat cover 7 through the intermediate guide rod 52, and the terminal blocks 4 on the two rear halves 32 are respectively connected to the rear seat covers 7 on both sides through a side guide rod 53; the insulating cylinder 11 and the fuse 6 are three corresponding to the number of rear seat covers 7.

[0033] In summary, this embodiment has the following advantages: 1. The coil 3 can be hoisted and positioned.

[0034] 2. It can adapt to the needs of built-in fuses and meet the striker alarm function.

[0035] 3. Its independent spring setting can avoid subsequent assembly actions.

[0036] 4. With internal thread function, it supports the installation of electric field shielding parts such as shielding nets and voltage equalizing covers.

[0037] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the present invention should still belong to the protection scope of the present invention.

[0038] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

Claims

1. A voltage transformer structure, characterized in that: It includes a casting body and an iron core, a coil, a terminal block, a guide rod, a fuse and a rear seat cover arranged in the casting body; The coil is sleeved on the iron core, the terminal block is connected and fixed to the coil, one end of the guide rod is connected and fixed to the terminal block, and the other end is connected and fixed to the rear seat cover, and the rear seat cover, the guide rod and the terminal block constitute a mechanism for hoisting the coil; The rear end of the rear seat cover has an open connected inner cavity, the cast body is formed with an insulating cylinder connected to the inner cavity of the rear seat cover, the fuse is installed in the insulating cylinder, and the fuse is simultaneously connected to the rear seat cover and is conductively connected through a guide rod, a terminal block and a coil.

2. A voltage transformer structure according to claim 1, characterized in that: A spring is installed between the fuse and the rear seat cover, and a shielding net is arranged on the periphery of the connecting end of the fuse and the rear seat cover.

3. A voltage transformer structure according to claim 2, characterized in that: One end of the shielding net is threadedly connected to the opening of the inner cavity of the rear seat cover, and is integrally cast and formed in the casting body along with the rear seat cover.

4. A voltage transformer structure according to claim 2, characterized in that: The fuse has a striker in it; the front end surface of the rear seat cover has a striker hole connected to the inner cavity, and the striker hole is located at the striker position of the fuse; the cast body has a striker channel connected to the striker hole and the outside.

5. A voltage transformer structure according to claim 2, characterized in that: A spring connection groove is concavely arranged on the front wall of the inner cavity of the rear seat cover, and the front end of the spring is clamped and crimped and fixed in the spring connection groove.

6. A voltage transformer structure according to claim 1, characterized in that: The rear seat cover comprises a circular cylinder seat and an arched connecting portion arranged below the circular cylinder seat; the inner cavity is formed in the circular cylinder seat; the arched connecting portion arches downward from the bottom of the circular cylinder seat, and a connecting groove is recessed at the bottom of the arched connecting portion; the guide rod has a connecting section installed in the connecting groove, the connecting section is welded and fixed to the connecting groove, and after welding, the connecting section maintains a smooth transition and non-pointed connection with the rear seat cover.

7. A voltage transformer structure according to claim 6, characterized in that: The connecting groove is a circular groove, and two groove edges of the circular groove are arc transitions.

8. A voltage transformer structure according to claim 1, characterized in that: The wiring board is attached and tied to the coil and is electrically connected to the coil; the guide rod is welded and fixed on the wiring board.

9. A voltage transformer structure according to claim 1, 6, 7 or 8, characterized in that: The guide rod is a hard metal conductive guide rod.

10. A voltage transformer structure according to claim 1, characterized in that: The cast body is provided with two annular iron cores arranged at intervals, and a group of coils is respectively sleeved on the upper part of each annular iron core; each group of coils is divided into a front half and a rear half; the rear seat covers are arranged in three pieces in parallel on the left and right, and the two iron cores and the corresponding coils are respectively located below between the two rear seat covers; the guide rods include a middle guide rod and two side guide rods, and a wiring board is respectively provided on the front half and the rear half of each group of coils, and the wiring boards on the two front halves are connected to the middle rear seat cover through the same middle guide rod, and the wiring boards on the two rear halves are respectively connected to the rear seat covers on both sides through a side guide rod; the insulating tubes and fuses are three pieces corresponding to the number of rear seat covers.

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