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 utility model relates to the technical field of mutual inductor, in particular to a voltage transformer structure. BACKGROUND

[0002] The existing mutual inductor with fuse is usually hoisted by soft connection or embedded part during production and manufacturing, and the iron core and coil need to be hoisted respectively or assembled by supporting cylinder, then pouring, and then loading fuse, shielding net and spring and other accessories, so that the production process is complicated and inefficient, and the electrical performance of the mutual inductor is affected by soft hoisting and supporting cylinder. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a voltage transformer structure, which has the advantages of reducing assembly action, improving production efficiency and ensuring electrical performance.

[0004] In order to achieve the above purpose, the utility model provides a solution as follows:

[0005] A voltage transformer structure comprises a pouring body, an iron core, a coil, a wiring board, a guide rod, a fuse and a rear seat sleeve arranged in the pouring body.

[0006] The coil is sleeved on the iron core, the wiring board is connected and fixed on the coil, one end of the guide rod is connected and fixed on the wiring board, and the other end is connected and fixed on the rear seat sleeve, and the rear seat sleeve, the guide rod and the wiring board form a mechanism for hoisting the coil.

[0007] The rear end of the rear seat sleeve has an opening communicating with the inner cavity, the pouring body forms an insulating cylinder communicating with the inner cavity of the rear seat sleeve, the fuse is installed in the insulating cylinder, and the fuse is connected to the rear seat sleeve and electrically connected through the guide rod, the wiring board and the coil.

[0008] Further, a spring is installed between the fuse and the rear seat sleeve, and a shielding net is arranged on the outer periphery of the connecting end of the fuse and the rear seat sleeve.

[0009] Further, one end of the shielding net is threadedly connected to the opening of the inner cavity of the rear seat sleeve and integrally poured and formed in the pouring body with the rear seat sleeve.

[0010] Further, the fuse has a striker, the front end face of the rear seat sleeve has a striker hole communicating with the inner cavity, the striker hole is located at the position of the striker of the fuse, and the pouring body has a striker channel communicating with the striker hole and the outside.

[0011] Further, the inner cavity of the rear seat sleeve is recessed with a spring connecting groove, and the front end of the spring is clamped and crimped and fixed in the spring connecting groove.

[0012] Further, the rear seat sleeve comprises a circular cylinder and an arch-shaped connecting part arranged below the circular cylinder; the inner cavity is formed in the circular cylinder; the arch-shaped connecting part arches downward from the bottom of the circular cylinder, and the bottom of the arch-shaped connecting part is concavely provided with a connecting groove; the guide rod has a connecting section mounted in the connecting groove, and the connecting section is welded and fixed with the connecting groove, and the connecting section is welded and fixed to be smoothly connected with the rear seat sleeve without a sharp end.

[0013] Further, the connecting groove is a circular groove, and two groove edges of the circular groove are circularly transitioned.

[0014] Further, the terminal block is attached and bound on the coil and electrically connected with the coil; the guide rod is welded and fixed on the terminal block.

[0015] Further, the guide rod is a hard metal conductive guide rod.

[0016] Further, the pouring body has two annular cores arranged at intervals, and each annular core is respectively sleeved with a group of coils; each group of coils is divided into a front half and a rear half; the rear seat sleeve is arranged in three left and right parallel arrangements, and two cores and corresponding coils are respectively arranged below two rear seat sleeves; the guide rod comprises a middle guide rod and two side guide rods, one terminal block is arranged on the front half and the rear half of each group of coils, respectively, and the terminal blocks on the two front halves are connected with the middle rear seat sleeve through the same middle guide rod, and the terminal blocks on the two rear halves are respectively connected with the two side rear seat sleeves through one side guide rod; the insulating cylinder and the fuse are three corresponding to the number of rear seat sleeves.

[0017] After the above technical scheme is adopted, the hard connection of the rear seat sleeve, the guide rod and the terminal block with the coil can realize the hoisting of the coil, without using other hoisting mechanisms, and can also avoid the influence of other hoisting mechanisms on the electrical performance.

[0018] Specifically, in the industrial production process, the coil is first wound on the core, and then the terminal block, the guide rod and the rear seat sleeve are fixed on the coil, and the hoisting connection of the coil is also completed at the same time, that is, before pouring, the inner core is inserted into the inner cavity through the opening of the rear seat sleeve, and the hoisting and positioning of the coil can be realized by using the rear seat sleeve, the action of hoisting the coil by using other hoisting mechanisms is saved, and the assembly action is reduced; then the core is independently hoisted, and then sent into the mold for pouring, and the pouring body can be completely and quickly poured, and the core, the coil, the terminal block, the guide rod and the rear seat sleeve are all covered in the pouring body, and the inner core can facilitate the pouring and forming of the insulating cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of an embodiment of the utility model;

[0020] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0021] Figure 3 This is a partial exploded view of an embodiment of the present utility model;

[0022] Figure 4 This is a partial structural schematic diagram of an embodiment of the present utility model.

[0023] Labeling descriptions: Cast-in-place body 1, Insulating cylinder 11, Strike pin 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, Strike pin hole 74, Spring connecting groove 75, Circular cylinder seat 76, Arched connecting part 77, Connecting groove 771, Spring 8, Shielding mesh 9, External thread 91. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] like Figures 1 to 4 As shown, a voltage transformer structure in this embodiment includes a casting 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 sleeve 7 disposed within the casting body 1.

[0026] The coil 3 is sleeved on the iron core 2, the terminal block 4 is connected and fixed to 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 sleeve 7. The rear seat sleeve 7, the guide rod 5 and the terminal block 4 constitute a mechanism for hoisting the coil 3.

[0027] The rear end of the rear seat cover 7 has an opening 71 that connects to the inner cavity 72. The casting body 1 forms an insulating cylinder 11 that connects to the inner cavity 72 of the rear seat cover 7. The fuse 6 is installed inside the insulating cylinder 11 and is also connected to the rear seat cover 7. It is electrically connected through the guide rod 5, the terminal block 4 and the coil 3.

[0028] Therefore, in this embodiment, by using the rear seat cover 7, guide rod 5 and terminal block 4 to rigidly connect with the coil 3, the coil 3 can be hoisted without the need for other hoisting mechanisms, and the impact of other hoisting mechanisms on electrical performance can also be avoided.

[0029] Specifically, in the industrial batch production process, the coil 3 is wound on the iron core 2, and then the terminal plate 4, the guide rod 5 and the rear seat sleeve 7 are fixed on the coil 3, at the same time, the hoisting connection of the coil 3 is also completed, that is, before pouring, the inner core (not shown in the figure) is inserted into the inner cavity 72 through the opening 71 of the rear seat sleeve 7, at this time, the rear seat sleeve 7 can be used to realize the hoisting positioning of the coil 3, and the action of hoisting the coil 3 by using other hoisting mechanisms is saved, and the assembly action is reduced; then the iron core 2 is hoisted independently, and then sent into the mold (not shown in the figure) for pouring, and the pouring body 1 can be completely and quickly poured out, and the pouring body 1 covers the iron core 2, the coil 3, the terminal plate 4, the guide rod 5 and the rear seat sleeve 7, and the inner core can facilitate the pouring and forming of the insulating cylinder 11.

[0030] As Figure 2 and Figure 3 In the embodiment, the spring 8 is installed between the fuse 6 and the rear seat sleeve 7, and the connection end of the fuse 6 and the rear seat sleeve 7 is provided with a shielding net 9, and the shielding net 9 is provided to realize the function of shielding the electric field. Of course, the shielding net 9 can also be replaced by a voltage grading shell or other electric field shielding member.

[0031] 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 sleeve 7, and is integrally poured into the pouring body 1 with the rear seat sleeve 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 sleeve 7, so that the shielding net 9 can be installed in advance by the front mounting method, and then poured, and the assembly is more convenient.

[0032] In the embodiment, the spring 8 can be pre-installed in the inner cavity 72 of the rear seat sleeve 7 before pouring, and then poured, and then the fuse 6 can be installed from the insulating cylinder 11, so that the fuse 6 can be installed conveniently and quickly, and the product assembly efficiency can be improved.

[0033] In the embodiment, the fuse 6 has a striker (the fuse 6 is a prior art and uses a schematic drawing, and the internal structure and the striker are not shown); the front end face of the rear seat sleeve 7 has a striker hole 74 communicating with the inner cavity 72, and the striker hole 74 is located at the position of the striker of the fuse 6; the pouring body 1 has a striker channel 12 communicating with the striker hole 74 and the outside. Thus, the striker ejection alarm function of the fuse 6 can be easily realized, and the product working state can be quickly and conveniently checked when the product fails.

[0034] Referring to Figure 4 In the embodiment, the front wall of the inner cavity 72 of the rear seat sleeve 7 can be concavely provided with a spring connecting groove 75, and the front end of the spring 8 can be clamped and crimped and fixed in the spring connecting groove 75. Specifically, the front end of the spring 8 can be riveted to the rear seat sleeve 7 through the striker hole 74 by using a rivet (not shown in the figure), and of course other crimping methods can also be used.

[0035] As Figure 4 In this embodiment, the rear seat sleeve 7 includes a circular seat 76 and an arch-shaped connecting portion 77 arranged below the circular seat 76; specifically, the rear seat sleeve 7 can be in the shape of a water droplet.

[0036] The inner cavity 72 is formed in the circular seat 76; the arch-shaped connecting portion 77 arches downward from the bottom of the circular seat 76, and the bottom of the arch-shaped connecting portion 77 is concavely provided with a connecting groove 771; the guide rod 5 has a connecting segment 51 mounted in the connecting groove 771, and the connecting segment 51 is welded and fixed with the connecting groove 771, and the connecting segment 51 remains smooth transition with the rear seat sleeve 7 without sharp ends after welding.

[0037] By arranging the arch-shaped connecting portion 77, the wall thickness of the rear seat sleeve 7 can be prevented from being too small to be welded, and at the same time, by arranging the connecting groove 771 on the arch-shaped connecting portion 77, the welding and fixing effect can be improved, and the electrical performance can be improved; specifically, the connecting groove 771 can accommodate part of the connecting segment 51, and the guide rod 5 connecting segment 51 and the rear seat sleeve 7 are balancedly connected, which can avoid excessive exposure of local sharp ends, avoid excessive concentration of electric field in one or several local parts, affect the partial discharge performance of the product, avoid excessive partial discharge in the internal part of the product, ensure the balance of electric field distribution, and improve the service life of the product.

[0038] In this embodiment, the connecting groove 771 is a circular groove, and the two groove edges of the circular groove are circularly transitioned. Similarly, the local sharp ends can be avoided, the balance of electric field distribution can be ensured, and the electrical performance can be ensured.

[0039] As Figure 3 shown, the terminal board 4 can be attached and bound to the coil 3 and electrically connected with the coil 3, and specifically, the insulation tape (not shown in the figure) can be used for binding; and the guide rod 5 is welded and fixed on the terminal board 4. The guide rod 5 is a hard metal conductive guide rod 5, such as a copper rod.

[0040] In this embodiment, the pouring body 1 has two annular cores 2 arranged at intervals, and 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 sleeve 7 is arranged in parallel left and right, and two cores 2 and corresponding coils 3 are respectively arranged below two rear seat sleeves 7; the guide rod 5 can include a middle guide rod 52 and two side guide rods 53, and each group of coils 3 is respectively provided with a terminal board 4 on the front half 31 and the rear half 32, and the terminal boards 4 on the two front halves 31 are connected with the middle rear seat sleeve 7 through the middle guide rod 52, and the terminal boards 4 on the two rear halves 32 are respectively connected with the two side rear seat sleeves 7 through one side guide rod 53; the insulation cylinder 11 and the fuse 6 are three corresponding to the number of rear seat sleeves 7.

[0041] In summary, the embodiment has the following advantages:

[0042] 1. The coil 3 can be hoisted and positioned.

[0043] 2. It can be adapted to the needs of the built-in fuse, while meeting the striker alarm function.

[0044] 3. Its independent spring setting can avoid subsequent assembly actions.

[0045] 4. With internal thread function, support installation of shielding net, voltage grading shield and other electric field shielding parts.

[0046] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical solution under the idea of the present application belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, equivalent changes and modifications without departing from the principles of the present application, all should still belong to the protection scope of the present application.

[0047] 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 drawings, or the orientation or position relationship commonly used when the product of the application is placed, or the orientation or position relationship commonly understood by those skilled in the art, only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

Claims

1. A voltage transformer structure, characterized in that: a pouring body and a core, a coil, a terminal board, a guide rod, a fuse and a rear seat sleeve arranged in the pouring body; the coil is sleeved on the core, the terminal board is fixedly connected to the coil, one end of the guide rod is fixedly connected to the terminal board, and the other end is fixedly connected to the rear seat sleeve, and the rear seat sleeve, the guide rod and the terminal board form a mechanism for hoisting the coil; the rear end of the rear seat sleeve has an opening communicating with the inner cavity, the pouring body forms an insulating barrel communicating with the inner cavity of the rear seat sleeve, the fuse is installed in the insulating barrel, and the fuse is connected to the rear seat sleeve at the same time and is conductively connected through the guide rod, the terminal board and the coil.

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

3. A voltage transformer structure according to claim 2, characterised in that: One end of the shielding net is threadedly connected to the opening of the inner cavity of the rear seat sleeve and is integrally poured and formed in the pouring body with the rear seat sleeve.

4. A voltage transformer structure according to claim 2, characterised in that: The fuse has a striker, the front end face of the rear seat sleeve has a striker hole communicating with the inner cavity, the striker hole is located at the position of the striker of the fuse, and the pouring body has a striker channel communicating with the striker hole and the outside.

5. A voltage transformer structure according to claim 2, characterised in that: The front end of the spring is clamped and crimped and fixed in the spring connecting groove.

6. A voltage transformer structure according to claim 1, characterized in that: The rear seat sleeve comprises a circular barrel and an arc-shaped connecting portion arranged below the circular barrel; the inner cavity is formed in the circular barrel; the arc-shaped connecting portion arches downward from the bottom of the circular barrel, and the bottom of the arc-shaped connecting portion is recessed to form a connecting groove; the guide rod has a connecting segment installed in the connecting groove, and the connecting segment is welded and fixed with the connecting groove, and the connecting segment is welded to keep smooth transition with the rear seat sleeve without sharp end.

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

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

9. A voltage transformer structure according to claim 1, 6, 7 or 8, characterised 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 pouring body has two spaced annular cores, and each annular core has a set of coils sleeved thereon; each set of coils is divided into a front half and a rear half; the rear seat sleeve is arranged in parallel on the left and right sides, and two cores and corresponding coils are arranged below two rear seat sleeves; the guide rod comprises a middle guide rod and two side guide rods, one terminal board is arranged on each of the front half and the rear half of each set of coils, the terminal boards on the two front halves are connected to the middle rear seat sleeve through the same middle guide rod, and the terminal boards on the two rear halves are connected to the two side rear seat sleeves through one side guide rod respectively; the insulating barrel and the fuse are three corresponding to the number of rear seat sleeves.

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