CN217881118U

CN217881118U - Bundling type current transformer

Info

Publication number: CN217881118U
Application number: CN202221117015.2U
Authority: CN
Inventors: 朱卫明
Original assignee: Haiyan Weijia Electric Technology Co ltd
Current assignee: Haiyan Weijia Electric Technology Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-11-22
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses a bundling type current transformer, including iron core, drain pan and cap, the iron core is rectangular frame type structure, two long limits of iron core are fixed respectively and are cup jointed two internal insulation shells, two the internal insulation shell outside twines two coils respectively, the iron core lateral wall corresponds the coil position and cup joints external insulation casing, a plurality of sponge rubber strips of the even rigid coupling of internal side wall of external insulation casing. The utility model discloses set up a plurality of sponge rubber strips outside the coil and carried out further fixed to the coil for the coil is compacter more real, and in the time of follow-up pouring epoxy between internal insulation shell and the external insulation shell, the condition of influence outward appearance in the epoxy infiltration coil can not appear, has also reduced epoxy's pouring weight simultaneously through a plurality of sponge rubber strips, has alleviateed whole weight, the utility model discloses a U type frame provides shock attenuation efficiency, can also conveniently open simultaneously, conveniently opens when satisfying the protection and maintains the iron core more.

Description

Bundling type current transformer

Technical Field

The utility model relates to a current transformer equipment technical field specifically is a tie up formula current transformer.

Background

The current transformer is one of the important parts of the gas insulated metal enclosed switchgear, and mainly consists of a closed iron core and a winding according to the transformer principle. Because the current in the lines of power generation, power transformation, power transmission, power distribution and power utilization is greatly different from several amperes to tens of thousands of amperes, the current needs to be converted into more uniform current for convenient measurement, protection and control, and in addition, the voltage on the lines is generally higher, and is very dangerous if the voltage is directly measured, so that the current transformer plays the roles of current transformation and electrical isolation at the moment. However, most current transformers are not capable of supplying current to high voltage equipment at present.

In view of the above, chinese utility model patent No. CN205376287U discloses a bundled current transformer, which includes a current transformer coil; one end of the secondary lead is connected with a copper wire in the current transformer coil; the other ends of the secondary leads are correspondingly connected with the wiring terminals one by one; wherein the outer diameter range of the current mutual inductor is 1045 mm-1050 mm; the current transformer coil includes: the iron core is of a closed annular structure; a copper wire wound around the core; the current transformer coil further includes: the inner insulation is arranged between the iron core and the copper wire; the external insulation is wound outside the copper wire; the inner insulation and the outer insulation are both made of polyester film.

This current transformer can provide the electric current for the equipment of high voltage demand, but current transformer need when using to encapsulate the improvement mechanical strength with the coil at coil department pouring epoxy, and its coil department does not have fastener, leads to epoxy to permeate in the coil gap easily, is unfavorable for the use, and this current transformer is also relatively poor to the barrier propterty of iron core in addition.

To this end we propose a bundled current transformer to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tie up formula current transformer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a bundled current transformer comprises an iron core, a bottom shell and a shell cover, wherein the iron core is of a rectangular frame structure, two long edges of the iron core are fixedly sleeved with two inner insulation shells respectively, two coils are wound on the outer sides of the two inner insulation shells respectively, the outer side wall of the iron core is sleeved with an outer insulation shell at the position corresponding to the coils, the inner side wall of the outer insulation shell is uniformly and fixedly connected with a plurality of sponge rubber strips, and the sponge rubber strips are contacted with the side walls of the coils;

the iron core comprises a bottom shell, an iron core, a bottom shell cover, a bottom cushion, two U-shaped frames and two upper cushions, wherein the bottom shell top surface corresponds to two short edge positions of the iron core and is vertically fixedly connected with the two U-shaped frames respectively, the short edge positions of the iron core are inserted into the U-shaped frames, the bottom surface of the inner side of each U-shaped frame is fixedly connected with the lower cushion, the bottom surface of the shell cover corresponds to the two upper cushions fixedly connected with the two U-shaped frames, the upper cushions are inserted into the top end of the inner portion of each U-shaped frame, the upper cushions contact the iron core top surface, and the lower cushions contact the iron core bottom surface.

Preferably, the top surface of the outer side wall of the bottom shell is fixedly connected with a frame shell, four corners of the top surface of the frame shell are respectively provided with four guide insertion holes, four corners of the bottom surface of the shell cover are respectively and fixedly connected with four guide insertion posts, and the guide insertion posts are inserted into the guide insertion holes.

Preferably, the two coils are a primary coil and a secondary coil respectively, the coils are fixedly connected with one ends of two wires, the other ends of the two wires are fixedly connected with fixing portions respectively, one end of each fixing portion far away from the corresponding wire is fixedly connected with an electric connecting terminal, and the electric connecting terminal is electrically connected with the corresponding wire.

Preferably, the top surface of the frame shell is provided with a slot opening, the fixing part is inserted at the bottom of the slot opening, the bottom surface of the edge of the shell cover corresponds to the slot opening and is fixedly connected with a butt plate, the butt plate is inserted in the slot opening, the butt plate contacts with the top surface of the fixing part, two limiting plates are fixedly connected to the outer sides of the two ends of the fixing part respectively and are in contact with the two sides of the frame shell, and the electric connection terminal is located on the outer side of the frame shell.

Preferably, the top surface of the bottom shell is fixedly connected with two cushions corresponding to the positions of the two outer insulating shells, the cushions are in contact with the bottom surface of the outer insulating shell, the shell cover is provided with two heat dissipation through holes corresponding to the positions of the two outer insulating shells, the positions of the top surface of the outer insulating shell are inserted into the inner bottoms of the heat dissipation through holes, and the two heat dissipation assemblies are fixedly sleeved in the heat dissipation through holes respectively.

Preferably, the radiating component comprises a radiating shell fixedly sleeved in the radiating through hole, a radiating channel is vertically arranged in the radiating shell, a radiating fan is fixedly connected in the radiating channel, the top surface and the bottom surface of the radiating channel are fixedly connected with two screen plates respectively, the bottom surface of the screen plate is fixedly connected with silicone grease, and the silicone grease contacts the top surface of the outer insulating shell.

Preferably, two installation parts are fixedly connected to two ends of the frame shell respectively, threaded holes are formed in the top surface of the installation parts, two ends of the shell cover are located at the same vertical positions of the two installation parts and fixedly connected with the two installation plates respectively, the two installation plates are rotatably connected with two locking bolts respectively, and the locking bolts are in threaded connection with the threaded holes.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses set up a plurality of sponge rubber strips outside the coil and carried out further fixed to the coil for the coil is compacter more real, and in the time of follow-up pouring epoxy between internal insulation shell and the external insulation shell, the condition of influence outward appearance in the epoxy infiltration coil can not appear, has also reduced epoxy's pouring weight simultaneously through a plurality of sponge rubber strips, has alleviateed whole weight, the utility model discloses a U type frame provides shock attenuation efficiency, can also conveniently open simultaneously, conveniently opens when satisfying the protection and maintains the iron core more.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged structural diagram of the explosion structure of the present invention;

FIG. 3 is an enlarged structural view of a partially cut structure of the iron core of the present invention;

fig. 4 is a schematic diagram of the structure of the middle bottom shell and the iron core of the present invention;

FIG. 5 is a schematic view of the structure of the heat dissipation assembly of the present invention;

fig. 6 is a schematic view of the bottom surface structure of the housing cover of the present invention.

In the figure: 1. an iron core; 2. a bottom case; 3. a shell cover; 4. a heat dissipating component; 11. an inner insulating case; 12. a coil; 13. an outer insulating case; 14. a sponge rubber strip; 15. a wire; 16. a fixed part; 17. an electrical connection terminal; 18. a limiting plate; 21. a frame housing; 22. a U-shaped frame; 23. a lower cushion; 24. a cushion pad; 25. a slot opening; 26. a guide jack; 27. an installation part; 28. a threaded hole; 31. a heat dissipating through hole; 32. an upper cushion; 33. a guide inserting column; 34. mounting a plate; 35. locking the bolt; 36. abutting against the plate; 41. a heat dissipation housing; 42. a heat dissipation channel; 43. a heat dissipation fan; 44. a screen plate; 45. and (3) silicone grease.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

referring to fig. 1-6, the present invention provides a technical solution: a bundling type current transformer comprises an iron core 1, a bottom shell 2 and a shell cover 3, wherein the iron core 1 is of a rectangular frame structure, two long sides of the iron core 1 are fixedly sleeved with two inner insulating shells 11 respectively, the outer sides of the two inner insulating shells 11 are wound with two coils 12 respectively, the outer side wall of the iron core 1 is sleeved with an outer insulating shell 13 corresponding to the positions of the coils 12, the inner side wall of the outer insulating shell 13 is fixedly connected with a plurality of sponge rubber strips 14 uniformly, and the sponge rubber strips 14 are in contact with the side walls of the coils 12;

two U type frame 22 of perpendicular rigid coupling respectively of 2 top surfaces of drain pan corresponding iron core 1 two minor face positions, 1 minor face department of iron core pegs graft in U type frame 22, cushion 23 under the inboard bottom surface rigid coupling of

U type frame

22, 3 bottom surfaces of cap correspond two upper cushion 32 of two U type frame 22 position rigid couplings, upper cushion 32 pegs graft on the inside top of U type frame 22, upper cushion 32 contact iron core 1 top surface, lower cushion 23 contact iron core 1 bottom surface, the utility model discloses set up a plurality of sponge rubber strips 14 outside coil 12 and carried out further fixed to the coil, make the coil compacter, follow-up when pouring epoxy between inner insulation shell 11 and outer insulation shell 13, the condition of influence outward appearance in the epoxy infiltration coil can not appear, has also reduced epoxy's pouring weight through a plurality of sponge rubber strips 14 simultaneously, has alleviateed whole weight, the utility model discloses a U type frame 22 provides shock attenuation efficiency, can also conveniently open simultaneously, satisfies the protection and maintains iron core 1 more.

Example 2:

referring to fig. 4, the top surface of the outer side wall of the bottom case 2 is fixedly connected to the frame casing 21, four corners of the top surface of the frame casing 21 are respectively provided with four guiding insertion holes 26, four corners of the bottom surface of the case cover 3 are respectively and vertically fixedly connected to four guiding insertion posts 33, and the guiding insertion posts 33 are inserted into the guiding insertion holes 26.

Referring to fig. 3-4, the two coils 12 are a primary coil and a secondary coil, respectively, the coil 12 is fixedly connected to one end of two wires 15, the other end of the two wires 15 is fixedly connected to a fixing portion 16, respectively, one end of the fixing portion 16 away from the wires 15 is fixedly connected to an electrical connection terminal 17, and the electrical connection terminal 17 is electrically connected to the wires 15.

Referring to fig. 2, the top surface of the frame casing 21 is provided with a socket 25, the fixing portion 16 is inserted into the bottom of the socket 25, the bottom surface of the edge of the casing 3 is fixedly connected to an abutting plate 36 corresponding to the socket 25, the abutting plate 36 is inserted into the socket 25, the abutting plate 36 contacts the top surface of the fixing portion 16, the outer sides of the two ends of the fixing portion 16 are fixedly connected to two limiting plates 18, the two limiting plates 18 contact the two sides of the frame casing 21, and the electrical connection terminal 17 is located on the outer side of the frame casing 21.

Referring to fig. 2 and 4, the top surface of the bottom case 2 is fixedly connected with two cushions 24 corresponding to the positions of the two outer insulation cases 13, the cushions 24 contact the bottom surface of the outer insulation cases 13, two heat dissipation through holes 31 are respectively vertically formed in the case cover 3 corresponding to the positions of the two outer insulation cases 13, the top surface of the outer insulation cases 13 is inserted into the bottom of the inner sides of the heat dissipation through holes 31, and the two heat dissipation assemblies 4 are respectively fixedly sleeved in the two heat dissipation through holes 31.

Referring to fig. 5, the heat dissipating assembly 4 includes a heat dissipating housing 41 fixedly sleeved in the heat dissipating through hole 31, a heat dissipating channel 42 is vertically formed in the heat dissipating housing 41, a heat dissipating fan 43 is fixedly connected in the heat dissipating channel 42, two screens 44 are fixedly connected to the top and bottom surfaces of the heat dissipating channel 42, a silicone grease 45 is fixedly connected to the bottom surface of the screen 44 located below, and the silicone grease 45 contacts the top surface of the outer insulating housing 13.

Referring to fig. 2, two installation departments 27 of frame casing 21 both ends difference rigid coupling, screw hole 28 is seted up to installation department 27 top surface, and 3 both ends of cap are located two same vertical position of installation department 27 two mounting panels 34 of rigid coupling respectively, rotate respectively on two mounting panels 34 and connect two locking bolt 35, and locking bolt 35 threaded connection screw hole 28, the utility model discloses when putting into operation, need fill epoxy between internal insulation shell 11 and external insulation shell 13, later install to the drain pan 2 in, can use behind the installation cap 3.

Example 3:

the utility model discloses when putting into operation, need pack epoxy between internal insulation shell 11 and external insulation shell 13, later install to drain pan 2 in, can use after the installation cap 3, the utility model discloses set up a plurality of sponge rubber strips 14 outside coil 12 and carried out further fixed to the coil for the coil is tighter and more real, and in the time of follow-up pouring epoxy between internal insulation shell 11 and external insulation shell 13, the condition of influence outward appearance in the epoxy infiltration coil can not appear, has also reduced epoxy's pouring weight through a plurality of sponge rubber strips 14 simultaneously, has alleviateed whole weight, the utility model discloses a U type frame 22 provides shock attenuation efficiency, can also conveniently open simultaneously, more conveniently opens when satisfying the protection and maintains iron core 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a banding formula current transformer, includes iron core (1), drain pan (2) and cap (3), its characterized in that:

the iron core (1) is of a rectangular frame structure, two long sides of the iron core (1) are fixedly sleeved with two inner insulating shells (11) respectively, two coils (12) are wound on the outer sides of the two inner insulating shells (11) respectively, the outer insulating shell (13) is sleeved on the outer side wall of the iron core (1) corresponding to the positions of the coils (12), a plurality of sponge rubber strips (14) are fixedly connected to the inner side wall of the outer insulating shell (13) uniformly, and the sponge rubber strips (14) contact the side walls of the coils (12);

bottom shell (2) top surface corresponds two U type frame (22) of two minor face positions of iron core (1) perpendicular rigid coupling respectively, iron core (1) minor face department is pegged graft in U type frame (22), cushion (23) under the inboard bottom surface rigid coupling of U type frame (22), cap (3) bottom surface corresponds two last cushion (32) of two U type frame (22) position rigid couplings, go up cushion (32) and peg graft on U type frame (22) inside top, go up cushion (32) contact iron core (1) top surface, cushion (23) contact iron core (1) bottom surface down.

2. The bundled current transformer as claimed in claim 1, wherein: the top surface of the outer side wall of the bottom shell (2) is fixedly connected with a frame shell (21), four guide insertion holes (26) are formed in four corners of the top surface of the frame shell (21), four guide insertion columns (33) are fixedly connected with four corners of the bottom surface of the shell cover (3) respectively, and the guide insertion columns (33) are inserted into the guide insertion holes (26) in an inserting mode.

3. The bundled current transformer as claimed in claim 2, wherein: two coil (12) are primary and secondary coil respectively, two wire (15) one end of coil (12) rigid coupling, two wire (15) other end rigid coupling fixed part (16) respectively, wire (15) one end rigid coupling electricity connecting terminal (17) are kept away from in fixed part (16), electricity connecting terminal (17) are connected with wire (15) electricity.

4. The bundled current transformer as claimed in claim 3, wherein: inserting groove openings (25) are formed in the top surface of the frame shell (21), fixing portions (16) are inserted into the bottom of the inserting groove openings (25), the bottom surface of the edge of the shell cover (3) corresponds to the inserting groove openings (25) in position and fixedly connected with abutting plates (36), the abutting plates (36) are inserted into the inserting groove openings (25), the abutting plates (36) contact the top surface of the fixing portions (16), two limiting plates (18) are fixedly connected to the outer sides of the two ends of the fixing portions (16) respectively, the two limiting plates (18) contact the two sides of the frame shell (21), and the electric connecting terminals (17) are located on the outer sides of the frame shell (21).

5. The bundled current transformer as claimed in claim 1, wherein: the bottom shell is characterized in that the top surface of the bottom shell (2) is fixedly connected with two cushion pads (24) corresponding to two outer insulation shells (13), the cushion pads (24) are in contact with the bottom surfaces of the outer insulation shells (13), two heat dissipation through holes (31) are respectively and vertically formed in the positions, corresponding to the two outer insulation shells (13), of the shell cover (3), the top surface of each outer insulation shell (13) is inserted into the inner bottom of the corresponding heat dissipation through hole (31), and the heat dissipation through holes (31) are internally and fixedly sleeved with two heat dissipation assemblies (4) respectively.

6. The bundled current transformer as claimed in claim 5, wherein: radiating component (4) are including fixed heat dissipation shell (41) of cup jointing in heat dissipation through-hole (31), set up heat dissipation channel (42) in heat dissipation shell (41) perpendicularly, rigid coupling heat dissipation fan (43) in heat dissipation channel (42), two otter boards (44) of heat dissipation channel (42) top surface and bottom surface rigid coupling respectively, be located the below otter board (44) bottom surface rigid coupling silicone grease (45), silicone grease (45) contact outer insulation shell (13) top surface.

7. The bundled current transformer as claimed in claim 2, wherein: frame casing (21) both ends rigid coupling two installation departments (27) respectively, screw hole (28) are seted up to installation department (27) top surface, cap (3) both ends are located two installation departments (27) same vertical position rigid coupling two mounting panels (34) respectively, two rotate respectively on mounting panel (34) and connect two locking bolt (35), locking bolt (35) threaded connection screw hole (28).