CN212934412U

CN212934412U - Capacitor core rolling rod and rolling extension rod

Info

Publication number: CN212934412U
Application number: CN202021303663.8U
Authority: CN
Inventors: 刘文斌
Original assignee: Huailai Chibo Electrical Equipment Co ltd
Current assignee: Huailai Chibo Electrical Equipment Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-04-09
Anticipated expiration: 2030-07-02

Abstract

The utility model relates to a system pole is rolled up to electric capacity core, including a system mobile jib, a system extension bar of rolling up, system mobile jib and system extension bar of rolling up are cylindrical stock, and the external diameter of rolling up the system mobile jib and rolling up the system extension bar is the same, system mobile jib one end is provided with screw or screw rod, system extension bar one end be provided with screw or screw rod matched with screw rod or screw on the system mobile jib of rolling up. The utility model discloses still relate to an electric capacity core system extension bar of rolling up, system extension bar of rolling up is cylindrical stock, and system extension bar external diameter is the same with the external diameter of cylindrical electric capacity core system mobile jib of rolling up, one end be provided with screw or screw rod matched with screw rod or screw on the system mobile jib of rolling up. The utility model discloses make the flooding epoxy process more abundant, still saved epoxy's use amount simultaneously.

Description

Capacitor core rolling rod and rolling extension rod

Technical Field

The utility model relates to an electric power tech field, specificly relate to a pole is made to electric power vary voltage capacitanc epoxy sheathed tube electric capacity core book.

Background

The existing transformer is one of the most important devices in the power system as a power device for converting, transmitting and distributing electric energy in the power system, and is of great importance to the safe operation of the power system. The transformer bushing is a main insulation device outside the transformer box, and the outgoing lines of the transformer winding must penetrate through the insulation bushing to insulate the outgoing lines and the outgoing lines from the transformer shell, and meanwhile, the transformer bushing plays a role in fixing the outgoing lines. The insulating sleeve has the forms of a pure porcelain sleeve, an oil-filled sleeve, a capacitor sleeve and the like due to different voltage grades. The pure porcelain bushing is mainly used for transformers of 10kV and below, a conductive copper rod is penetrated in the porcelain bushing, and air insulation is adopted in the porcelain bushing. The oil-filled bushing is mainly used for 35kV transformers, oil is filled in a porcelain bushing, a conductive copper rod penetrates through the porcelain bushing, and insulating paper is wrapped outside the copper rod. The condenser type bushing is composed of a main insulating capacitor core, a connecting flange, an insulating outer sleeve and the like, and is used for a high-voltage transformer with the voltage of more than 100 kV.

The capacitive transformer bushing is divided into an oil-impregnated paper bushing and an epoxy resin-impregnated paper bushing. The capacitor core of the capacitor sleeve is formed by tightly wrapping an insulating layer with a certain thickness on a capacitor core rolling rod by using electric insulating paper, wrapping a layer of aluminum foil outside the insulating layer to be used as a capacitor screen, and then continuously wrapping the insulating paper and the aluminum foil in a staggered manner until the required layer number and thickness are reached. This forms a multi-layer series capacitor circuit, the potential of the conductive tube is highest, and the aluminum foil on the outermost layer is grounded (ground screen). According to the principle of voltage division of series capacitors, the voltage to ground of the conductive tube is equal to the sum of the voltages between the capacitor screens, and the voltages between the capacitor screens are inversely proportional to the capacitance of the capacitor screens, so that all the voltages are uniformly distributed on all the insulators of the capacitor cores, and the sleeve is small in size and light in weight.

SUMMERY OF THE UTILITY MODEL

The utility model aims at in the electric capacity core manufacture process among the prior art, the space of electric capacity core and mould bottom is big, and flooding epoxy is not abundant, and the extravagant serious technical problem of epoxy provides an electric capacity core system pole of rolling up, can make flooding epoxy process more abundant, has still saved epoxy's use amount simultaneously.

In order to realize the above object, the utility model provides a pole is made to electric capacity core book, include: a system mobile jib, a system extension bar of rolling up, system mobile jib and system extension bar of rolling up are cylindrical stock, and system mobile jib is the same with the external diameter of system extension bar of rolling up, and system mobile jib one end is provided with screw or screw rod, system extension bar one end be provided with roll up system on the mobile jib screw or screw rod or screw of screw rod matched with.

Preferably, the screw hole is consistent with the screw rod in specification, and a tool withdrawal groove is formed in the screw rod.

Preferably, a wrench slot is arranged at one end of the rolled extension bar.

Preferably, the wrench slot is one or more of a milling flat position, an outer hexagonal position, outer four corners, an inner hexagonal position and inner four corners.

Preferably, a detachable hanging ring is arranged on the other side of the rolling main rod.

The utility model also provides a system extension bar is rolled up to electric capacity core, and system extension bar is cylindrical stock, and system extension bar external diameter is the same with the external diameter of cylindrical electric capacity core system mobile jib, and system extension bar one end is provided with screw or screw rod matched with screw rod or screw on the system mobile jib of rolling up.

The specification of the screw hole or the screw rod is consistent with that of the screw hole or the screw rod on the rolling main rod, and a tool withdrawal groove is formed in the screw rod.

One end of the rolled extension bar is provided with a wrench groove. The wrench slot position is one or more of a milling flat position, an outer hexagonal, outer four corners, an inner hexagonal and inner four corners.

The capacitor core rolled extension bar is made of hard metal and has a smooth outer surface.

The utility model provides a pole is made to electric capacity core book when carrying out flooding epoxy process for the space of electric capacity core and mould bottom reduces greatly, can make flooding epoxy process more abundant, still saved epoxy's use amount simultaneously.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic diagram of a prior art capacitor core construction;

FIG. 2 is a schematic view of a prior art capacitor core mold;

FIG. 3 is a cut-and-trim schematic view of a prior art capacitor core;

FIG. 4 is a schematic view of a capacitor core rolling rod according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a capacitor core according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a capacitor core after being cut according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of capacitor core molding according to an embodiment of the present invention;

fig. 8 is a schematic view of the structure of the extension rod made of three capacitor cores according to the embodiment of the present invention.

Detailed Description

As shown in fig. 1, in the prior art, a capacitor core 2 of an epoxy resin impregnated paper bushing is manufactured by winding insulating paper 22 and aluminum foil 23 on a capacitor core winding rod 1 according to a preset size and thickness, impregnating the capacitor core in vacuum by epoxy resin, and then heating and curing the capacitor core.

As shown in fig. 2, in the prior art, a wound capacitor core 2 is loaded into a mold 3 and an epoxy resin impregnation process is performed, and the mold 3 is generally composed of an outer mold 31 and a base 32.

As shown in fig. 3, in the prior art, in the capacitor core 2 of the epoxy resin impregnated paper bushing, an uneven layer with a certain thickness is formed at two ends of the capacitor core 2 during the rolling process, and a part of the insulation paper 24 layer left at two ends of the capacitor core 2 needs to be cut off by a knife, so that two ends of the remaining rolled insulation paper layer 25 are aligned.

Referring to fig. 2, when the insulation paper 24 is partially cut off, and the wound capacitor core 2 is loaded into the mold 3 to perform an epoxy resin impregnation process, a large space 4 is formed between the lower end of the capacitor core 2 and the base 32. When the epoxy resin impregnation process is performed, the space 4 needs to be completely immersed in the epoxy resin and cured together, and due to the fact that the epoxy resin has a certain viscosity, the epoxy resin impregnation is insufficient due to the large space 4, and a large amount of epoxy resin resources are wasted.

Example one

Fig. 4 is a schematic view of a capacitor core rolling rod according to an embodiment of the present invention. As shown in fig. 4, the capacitor core-rolled rod of the present embodiment comprises: one system mobile jib 11 and one system extension bar 12 of rolling up, system mobile jib 11 and system extension bar 12 of rolling up are cylindrical stock, and system mobile jib external diameter d1 is the same with system extension bar external diameter d2 of rolling up, and the one end of system mobile jib 11 of rolling up is provided with screw or screw rod 111, and the one end of system extension bar 12 is provided with and rolls up screw or screw rod 111 matched with screw or screw 121 on the system mobile jib 11.

In this embodiment, the capacitor core rolled extension bar 12 is made of hard metal and has a smooth outer surface.

It should be understood by those skilled in the art that the outer diameter d1 of the rolled main rod is the same as the outer diameter d2 of the rolled extension rod, and there will be some error in practice or some redundancy should be retained in practice.

The following two cases can be realized in this embodiment: in one case, a screw hole is arranged at one end of the rolling main rod 11, and a matched screw rod is arranged at one end of the rolling extension rod 12; in another case, a screw is provided at one end of the rolling main rod 11, and a matching screw hole is provided at one end of the rolling extension rod 12. The screw hole and the screw rod have the same thread specification, the screw hole depth L1 and the screw rod length L2 are the same, and the rolling main rod 11 and the rolling extension rod 12 can be tightly connected together through the screw hole and the screw rod.

Those skilled in the art will appreciate that the thread specifications are consistent, and the screw hole depth L11 and the screw length L51 are consistent, so that in practice, a certain error exists, or in practice, a certain redundancy needs to be maintained.

In order to facilitate tool withdrawal during machining and to enable the rolling main rod 11 and the rolling extension rod 12 to be attached more tightly during assembly, in the embodiment, a tool withdrawal groove and a chamfer angle can be further formed in the screw rod.

In this embodiment, as shown in fig. 4, the rolling main rod 11 and the rolling extension rod 12 are tightly connected together through a screw hole and a screw rod to form a capacitor core rolling rod 1, and then the insulation paper 22 and the aluminum foil 23 are wound on the capacitor core rolling rod 1 according to a preset size and thickness. In the winding process of the capacitor core 2, uneven layers with certain thickness are formed at two ends of the capacitor core 2, and a part of the insulating paper 24 layers left at two ends of the capacitor core 2 need to be cut off by a knife, so that two ends of the remaining wound insulating paper layer 25 are neat. After the cutting, as shown in fig. 5, the rolled extension bar 12 is detached from the capacitor core rolled bar 1.

Then, as shown in the left drawing of fig. 6, the wound capacitor core 2 is loaded into a mold 3, and an epoxy resin impregnation process is performed, and the mold 3 is composed of an outer mold 31 and a base 32. As can be seen from FIG. 6, in this embodiment, the space 4 formed between the lower end of the capacitor element 2 and the base 32 is greatly reduced compared with the prior art. When carrying out the epoxy resin process of flooding, need with this space 4 submergence in epoxy completely and solidify together, because epoxy has certain consistency, space 4 reduces can make epoxy resin process of flooding more abundant, has still saved epoxy's use amount simultaneously.

Example two

The embodiment provides a capacitor core rolling rod 1 which is formed by tightly connecting a rolling main rod 11 and a rolling extension rod 12 with a screw rod through a screw hole. In order to facilitate the removal of the rolled extension bar 12, in the present embodiment, as shown in fig. 8, a wrench slot 122 is disposed at one end of the rolled extension bar 12.

As shown in fig. 8, the wrench slot 122 may be one or more of a milled flat position, an outer hexagon, outer four corners, an inner hexagon, and inner four corners.

In this embodiment, in order to facilitate the hoisting, a detachable hanging ring is further arranged on the other side of the coiled main rod 11 without a screw hole or a screw rod.

EXAMPLE III

The embodiment provides a capacitor core rolled extension bar 12 which is a cylindrical extension bar made of hard metal and has a smooth outer surface; preferably, the coiled extension bar is made of carbon steel through high-temperature quenching, and further, chromium can be plated on the outer surface of the coiled extension bar.

The outer diameter d2 of the rolled extension bar is the same as the outer diameter d1 of the cylindrical capacitor core rolled main rod; one end of the rolling extension bar 12 is provided with a screw rod or a screw hole 121 matched with the screw hole or the screw rod on the rolling main rod.

The specification of the screw hole or the screw rod 121 is consistent with that of the screw hole or the screw rod 111 on the rolling main rod, and the screw rod 121 is provided with a tool withdrawal groove, so that the rolling main rod 11 and the rolling extension rod 12 can be attached more closely without gaps.

One end of the rolled extension bar 12 is provided with a wrench groove 122; the wrench slot 122 is one or more of a milling flat position, an outer hexagon, outer four corners, an inner hexagon and inner four corners; is convenient to be screwed by a spanner in actual use.

Claims

1. A capacitor core rolling rod is characterized by comprising: a system mobile jib, a system extension bar of rolling up, it is cylindrical stock to roll up system mobile jib and system extension bar of rolling up, it is the same with the external diameter of system extension bar to roll up the system mobile jib, it is provided with screw or screw rod to roll up system mobile jib one end, system extension bar one end be provided with roll up screw or screw rod matched with screw rod or screw on the system mobile jib.

2. The capacitor core rolling rod as claimed in claim 1, wherein the screw hole is formed in a same size as the screw, and the screw is provided with a relief groove.

3. The capacitor core rolled rod as claimed in claim 1, wherein a wrench slot is provided at one end of the rolled extension rod.

4. The capacitor core rolling rod according to claim 3, wherein the wrench slot is one or more of a flat milling position, an outer hexagonal shape, outer four corners, an inner hexagonal shape and inner four corners.

5. The capacitor core rolling rod as claimed in claim 1, wherein a detachable hanging ring is provided on the other side of the rolling main rod.

6. The utility model provides a system extension bar is rolled up to electric capacity core which characterized in that, it is cylindrical stock to roll up system extension bar, it is the same with the external diameter of cylindrical electric capacity core system mobile jib to roll up system extension bar external diameter, roll up system extension bar one end be provided with roll up screw or screw rod or screw that screw rod matched with on the system mobile jib.

7. The capacitor core rolled extension bar according to claim 6, wherein the screw hole or screw rod has a specification identical to that of the screw hole or screw rod on the rolled main rod, and the screw rod is provided with a tool withdrawal groove.

8. The capacitor core rolled extension bar of claim 6, wherein a wrench slot is provided at one end of the rolled extension bar.

9. The capacitor core rolled extension bar of claim 8, wherein the wrench slot is one or more of a milled flat position, an outer hexagonal shape, outer four corners, an inner hexagonal shape, and inner four corners.

10. The capacitor core-rolled extension bar according to claim 6, wherein the capacitor core-rolled extension bar is made of hard metal and has a smooth outer surface.