阅读说明：本技术 一种电力电缆附件的冷缩扩张方法及装置 (Cold contraction expansion method and device for power cable accessory ) 是由 胡冉 于 2020-12-18 设计创作，主要内容包括：本发明公开了一种电力电缆附件的冷缩扩张方法,在扩张模具本体的锥形头上涂上润滑油；扩张模具本体带动锥形头移动,锥形头进入待扩张电缆附件的内部；锥形头上的润滑油对待扩张电缆附件的内部进行润滑,锥形头连同扩张模具本体将待扩张电缆附件支撑起来；锥形头连同扩张模具本体从待扩张电缆附件中抽出,完成扩张。本发明还公开了一种电力电缆附件的冷缩扩张装置。实施本发明的电力电缆附件的冷缩扩张方法及装置,有效减小电缆附件在扩张时与扩张模具之间的摩擦,保护电缆附件；结构精简,易于控制成本。(The invention discloses a cold contraction expansion method of a power cable accessory, which comprises the steps of coating lubricating oil on a conical head of an expansion die body; the expansion die body drives the conical head to move, and the conical head enters the interior of the cable accessory to be expanded; lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded, and the conical head and the expansion die body support the cable accessory to be expanded; and the conical head and the expansion die body are drawn out of the cable accessory to be expanded to complete expansion. The invention also discloses a cold-contraction expansion device of the power cable accessory. By implementing the cold-contraction expansion method and the cold-contraction expansion device for the power cable accessory, the friction between the cable accessory and the expansion mould during expansion is effectively reduced, and the cable accessory is protected; the structure is simple, and the cost is easy to control.)

1. A cold-contraction expansion method of a power cable accessory is characterized by comprising the following steps:

coating lubricating oil on the conical head of the expansion die body;

the expansion die body drives the conical head to move, and the conical head enters the interior of the cable accessory to be expanded;

lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded, and the conical head and the expansion die body support the cable accessory to be expanded;

and the conical head and the expansion die body are drawn out of the cable accessory to be expanded to complete expansion.

2. The method for cold-shrink expansion of a power cable accessory according to claim 1, wherein the step of lubricating the inside of the to-be-expanded cable accessory with the tapered head by pouring the lubricating oil into the tapered head and the step of supporting the to-be-expanded cable accessory with the expansion die body further comprises:

and a step of inserting a support PP strip into the cable accessory to be expanded.

3. A method for cold-shrink expansion of a power cable accessory as claimed in claim 1, wherein said step of expanding said die body to move said cone head into the interior of the power cable accessory to be expanded further comprises:

and filling lubricating oil into the cable accessory to be expanded.

4. A cold-shrink expansion device for a power cable accessory, comprising: the expansion die comprises an expansion die body, a top fixing plate and a bottom fixing plate, wherein the top fixing plate and the bottom fixing plate are used for fixing a cable accessory to be expanded;

the tip of expansion mould body is equipped with a conical head, scribble lubricating oil on the conical head, wherein: the expansion die body drives the conical head to move, the conical head enters the interior of the cable accessory to be expanded, and lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded.

5. A cold-shrink expansion device for power cable accessories as claimed in claim 4, wherein the inside of said cable accessory to be expanded is impregnated with lubricating oil.

6. The cold-shrink expanding apparatus for power cable accessories of claim 4, wherein the top fixing plate and the bottom fixing plate have a flat plate shape, respectively, and the fixing plates are disposed opposite to each other.

Technical Field

The invention relates to the technical field of power equipment, in particular to a cold-contraction expansion method and device for a power cable accessory.

Background

In the prior art, the cold-shrinkage type cable accessory has the characteristics of small volume, convenient operation, few product specifications and the like. Before the cable accessory is installed and used, the cold-shrinkable cable accessory is in a high-tension state, and the cable accessory is easy to be permanently deformed or elastically loosened when the cable accessory is in the high-tension state for a long time. Therefore, the on-site expansion is adopted for the cold-shrinkable cables with higher requirements of 110kV and above, and the expansion of the cold-shrinkable cable accessories with lower requirements of 35kV and below is generally finished before delivery at home and abroad.

The existing in-field expansion method for the cold-shrinkable cable accessory generally adopts a mechanical and pneumatic combined technology method. The defects existing in the mode are that: traces can be left at two ends for fixing the cable accessories, local deformation is easy to generate, on one hand, the attractiveness is influenced, and on the other hand, the product quality is also influenced; in addition, there is a safety risk caused by damage to the cold-shrinkable cable accessories during the expansion process.

Disclosure of Invention

The invention aims to solve the technical problem of providing a cold contraction expansion method and a device of a power cable accessory, which effectively reduce the friction between the cable accessory and an expansion mould during expansion and protect the cable accessory; the structure is simple, and the cost is easy to control.

In order to solve the above technical problem, an embodiment of the present invention provides a cold contraction expansion method for a power cable accessory, including the following steps: coating lubricating oil on the conical head of the expansion die body; the expansion die body drives the conical head to move, and the conical head enters the interior of the cable accessory to be expanded; lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded, and the conical head and the expansion die body support the cable accessory to be expanded; and the conical head and the expansion die body are drawn out of the cable accessory to be expanded to complete expansion.

Wherein, lubricating oil will be treated to expand cable accessories's inside pouring into lubricating oil on the conical head, and the conical head still includes after will treating the step that the expansion cable accessories was supported together with expansion mould body: and a step of inserting a support PP strip into the cable accessory to be expanded.

Wherein, the expansion mould body drives the cone head and removes, and the cone head still includes before getting into the step of treating the inside of expansion cable accessories: and pouring lubricating oil into the cable accessory to be expanded.

In order to solve the technical problem, the invention also discloses a cold-contraction expansion device of a power cable accessory, which comprises: the expansion die comprises an expansion die body, a top fixing plate and a bottom fixing plate, wherein the top fixing plate and the bottom fixing plate are used for fixing a cable accessory to be expanded; the tip of expansion mould body is equipped with a conical head, scribbles lubricating oil on the conical head, wherein: the expansion die body drives the conical head to move, the conical head enters the interior of the cable accessory to be expanded, and lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded.

Wherein, the interior of the cable accessory to be expanded is filled with lubricating oil.

Wherein, the top fixed plate and the bottom fixed plate are respectively in a flat plate shape, and the two fixed plates are arranged oppositely.

The implementation of the cold-contraction expansion method and the device of the power cable accessory has the following beneficial effects: coating lubricating oil on the conical head of the expansion die body; the expansion die body drives the conical head to move, and the conical head enters the interior of the cable accessory to be expanded; lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded, and the conical head and the expansion die body support the cable accessory to be expanded; the conical head and the expansion die body are drawn out of the cable accessory to be expanded to complete expansion, so that the friction between the cable accessory and the expansion die during expansion is effectively reduced, and the cable accessory is protected; the structure is simple, and the cost is easy to control.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a cold-shrink expanding device of a power cable accessory according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 shows a first embodiment of a cold-shrink expansion device of a power cable accessory according to the present invention.

An embodiment of the present invention provides a cold-shrink expansion device of a power cable accessory, including: the expansion die comprises an expansion die body 1, and a top fixing plate 3 and a bottom fixing plate 4 which are used for fixing a cable accessory 2 to be expanded; the tip of expansion mould body 1 is equipped with a conical head 11, scribbles lubricating oil on conical head 11, wherein: the expansion die body 1 drives the conical head 11 to move, the conical head 11 enters the interior of the cable accessory 2 to be expanded, and lubricating oil on the conical head 11 lubricates the interior of the cable accessory 2 to be expanded.

In specific implementation, the expansion die body 1 is cylindrical, and a tapered head 11 is arranged at the end part of the expansion die body. The expansion operation of the expansion die body 1 on the cable accessory 2 to be expanded can be performed in a manner of expanding with reference to the existing cold-shrinkage type cable accessory, which is the same as the prior art.

The cable accessory 2 to be expanded is arranged between the top fixing plate 3 and the bottom fixing plate 4, the two fixing plates are used for fixing the cable accessory 2 to be expanded and assisting the expansion die body 1 to perform expansion operation.

Preferably, the top fixing plate 3 and the bottom fixing plate 4 are respectively shaped like a flat plate, and the two fixing plates are disposed opposite to each other, so that the expansion operation is smoothly performed, and the stability is ensured.

Preferably, the interior of the cable accessory 2 to be expanded is impregnated with a lubricating oil.

The conical head 11 is coated with lubricating oil and the inside of the cable accessory 2 to be expanded is filled with lubricating oil, so that the functions of: the friction between the expansion die body 1 and the inner wall of the cable accessory 2 to be expanded is reduced, and the cable accessory is protected during expansion.

The embodiment of the invention also provides a cold contraction expansion method of the power cable accessory, which comprises the following steps:

s10, coating lubricating oil on the conical head of the expansion die body;

s20, the expansion die body drives the conical head to move, and the conical head enters the interior of the cable accessory to be expanded; lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded, and the conical head and the expansion die body support the cable accessory to be expanded;

and S30, drawing the conical head together with the expansion die body out of the cable accessory to be expanded to complete expansion.

Further, step S20 is followed by: and a step of inserting a support PP strip into the cable accessory to be expanded.

Further, step S20 is preceded by: and pouring lubricating oil into the cable accessory to be expanded.

In the specific implementation of the cold-shrink expansion method of the power cable accessory in the embodiment, lubricating oil is coated on the conical head of the expansion die body; the expansion die body drives the conical head to move, and the conical head enters the interior of the cable accessory to be expanded; lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded, and the conical head and the expansion die body support the cable accessory to be expanded; and the conical head and the expansion die body are drawn out of the cable accessory to be expanded to complete expansion. In the process, the conical head is coated with lubricating oil and the inside of the cable accessory to be expanded is filled with the lubricating oil, so that the functions of: the friction between the expansion die body and the inner wall of the cable accessory to be expanded is reduced, and the cable accessory is protected during expansion.

The implementation of the cold-contraction expansion method and the device of the power cable accessory has the following beneficial effects: coating lubricating oil on the conical head of the expansion die body; the expansion die body drives the conical head to move, and the conical head enters the interior of the cable accessory to be expanded; lubricating oil on the conical head lubricates the interior of the cable accessory to be expanded, and the conical head and the expansion die body support the cable accessory to be expanded; the conical head and the expansion die body are drawn out of the cable accessory to be expanded to complete expansion, so that the friction between the cable accessory and the expansion die during expansion is effectively reduced, and the cable accessory is protected; the structure is simple, and the cost is easy to control.