CN112863767B

CN112863767B - Cable insulation forces frock that contracts that moves back

Info

Publication number: CN112863767B
Application number: CN202110070496.XA
Authority: CN
Inventors: 张宝磊; 梁栋; 万畅; 孔灿; 赵艺璇; 白晓烨
Original assignee: Jiangsu Zhongtian Technology Cable Accessories Co ltd
Current assignee: Jiangsu Zhongtian Technology Cable Accessories Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2022-11-08
Anticipated expiration: 2041-01-19
Also published as: CN112863767A

Abstract

The invention provides a cable insulation layer forced retraction tool, which belongs to the technical field of cable accessories and comprises: the fixing assembly is provided with a fixing body, one end of which is suitable for being fixedly connected with the conductor of the cable; the rotating piece is movably sleeved on the outer surface of the fixed body; the rotating piece is provided with an abutting end which is suitable for abutting against an insulating layer of the cable; the cable insulation layer forced retraction tooling can accurately control the insulation retraction distance, does not damage the cable insulation in the using process, and has the advantages of simple and convenient operation, low requirement on operators and strong applicability.

Description

Cable insulation forces frock that contracts that moves back

Technical Field

The invention relates to the technical field of cable accessories, in particular to a cable insulation layer forced retraction tool.

Background

The crosslinked polyethylene insulated cable has excellent electrical and mechanical properties and a large transmission capacity, and is widely used at home and abroad.

The crosslinked polyethylene cable comprises: a conductor and an insulating layer; the insulating layer can generate internal stress in the production process of the three-layer extrusion working procedure, so that the insulating layer is inevitably shrunk; however, in the running process of a cable line, if the insulating layer of the cable shrinks, the installation size of the matched cable accessory is influenced, particularly the middle joint is greatly influenced, and the cable or the cable accessory breaks down when the influence is serious, so that a tripping power failure accident is caused; therefore, it is desirable to eliminate the problem of shrinkage of the insulation layer of the cable to the greatest possible extent before the cable accessory is installed.

In the prior art, before a cable line runs, after an insulating layer of the cable is heated for a period of time, a wood block is padded on the insulating layer, and then a hammer is used for knocking, so that the insulating layer of the cable is contracted, and the contraction of the cable line in the running process is reduced; however, in this way, the insulation layer of the cable is easily damaged, which affects the service life of the cable.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the insulating layer of the cable is shrunk by using a hammer to knock, the insulating layer of the cable is easily damaged, and the service life of the cable is influenced in the prior art, so that the cable insulation forced retraction tool is provided.

In order to solve the technical problem, the invention provides a cable insulation layer forced retraction tool, which comprises:

the fixing assembly is provided with a fixing body, one end of which is suitable for being fixedly connected with the conductor of the cable;

the rotating piece is movably sleeved on the outer surface of the fixed body; the rotating member has an abutment end adapted to abut an insulating layer of the cable.

Preferably, the method further comprises the following steps:

the pushing block is annular and is suitable for being sleeved on the conductor of the cable; one end of the pushing block is suitable for being abutted to the insulating layer of the cable, and the other end of the pushing block is abutted to the abutting end of the rotating piece.

Preferably, the outer diameter of the abutting block is larger than the insulating layer of the cable.

Preferably, one end of the pushing and abutting block, which is close to the rotating piece, is provided with an annular flange; the abutting end of the rotating piece abuts against the annular flange.

Preferably, the fixed body is provided with a fixed end for fixing the conductor and a connecting end for connecting with the rotating piece;

the outer surface of the connecting end of the fixed body is provided with an external thread, and the inner surface of the rotating piece is provided with an internal thread matched with the external thread of the fixed body.

As preferred scheme, the link of fixed body is the dislocation with the stiff end and connects, forms and stops the step.

Preferably, the fixing assembly further comprises:

a pressing sheet having an arc-shaped surface for abutting against a conductor of the cable; the fixing body is fixedly connected with a conductor of the cable through a bolt and the pressing sheet.

Preferably, the pressing sheet is provided with at least two pieces, and the pressing sheet is symmetrically attached to the outer surface of the conductor of the cable.

Preferably, the method further comprises the following steps:

and the handle is arranged on the outer surface of the rotating piece.

The technical scheme of the invention has the following advantages:

1. the invention provides a cable insulation layer forced retraction tooling, which comprises: a fixed component and a rotating component; through the relative movement of the rotating part and the fixing component, the abutting end of the rotating part jacks up the insulating layer of the cable, and the insulating layer is forcibly contracted along the axial direction of the cable; the tool can accurately control the insulation retraction distance, the cable insulation cannot be damaged in the using process, the operation is simple and convenient, the requirement on the operating personnel is low, and the applicability is high.

2. The invention provides a cable insulation layer forced retraction tool, which further comprises: a pushing block; the outer diameter of the pushing block is larger than the insulating layer of the cable; the auxiliary rotating piece can better push the insulating layer to be forcibly contracted; the push area is increased.

3. According to the cable insulation layer forced retraction tool, the annular flange and the blocking step are arranged, so that the position of the rotating part can be better limited.

4. According to the cable insulation layer forced retraction tooling, the rotating part is in threaded connection with the fixed body, and the cable insulation retraction distance can be accurately and uniformly controlled.

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 embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic cross-sectional structural view of a cable insulation layer forcible retraction tool of the present invention.

Description of reference numerals:

1. an insulating layer; 2. a rotating member; 3. a fixed end; 4. a connecting end; 5. a pushing block; 6. tabletting; 7. a handle; 8. a bolt; 9. a conductor.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The utility model provides a cable insulation forces frock of shrinking back which this embodiment provides includes: the fixing component and the rotating component 2 enable the butt joint end of the rotating component 2 to jack up the insulating layer 1 of the cable through the relative movement of the rotating component 2 and the fixing component, and the insulating layer 1 is forced to contract along the axial direction of the cable; the tool can accurately control the insulation retraction distance, the cable insulation cannot be damaged in the using process, the operation is simple and convenient, the requirement on operators is low, and the applicability is strong.

As shown in fig. 1, the fixing body has a fixing end 3 and a connecting end 4; the fixed body is internally provided with a cavity which is sleeved on a conductor 9 of the cable; have the screw hole on fixed end 3 of fixed body, bolt 8 passes the screw hole, and the tip and the 6 butt of preforming of bolt 8, preforming 6 laminating realize fixed body and cable conductor 9's fixed connection on the surface of conductor 9.

Specifically, the pressing sheet 6 is provided with two pieces which are symmetrically attached to the surface of the conductor 9, the pressing sheet 6 is arc-shaped, the inner diameter of the pressing sheet 6 is 1-5mm larger than the outer diameter of the conductor 9, and the outer diameter of the pressing sheet 6 is smaller than the inner diameter of the cavity of the fixed body; at least two bolts 8 are correspondingly arranged on each pressing sheet 6, so that the fixing body and the conductor 9 are fixed more tightly. The arrangement of the pressing sheet 6 increases the contact area of the bolt 8 and the conductor 9, and increases the fixing strength.

The fixed end 3 and the connecting end 4 of the fixed body are arranged in a staggered manner to form a blocking step; the external surface of link 4 has the external screw thread, and link 4 threaded connection has and rotates piece 2. The rotating part 2 is cylindrical and is sleeved on the outer surface of the connecting end 4; meanwhile, the inner surface of the rotating part 2 is provided with an internal thread matched with the external thread of the connecting end 4, so that the threaded connection between the rotating part 2 and the fixed body is realized, and the moving forming of the rotating part 2 and the fixed body needs to be more than 20mm; in the initial state, the lower end of the rotating piece 2 is abutted against the blocking step; the outer surface mounting who rotates piece 2 has handle 7, conveniently rotates piece 2.

The upper end of the rotating piece 2 is abutted against the pushing block 5; the push block 5 is annular, the inner diameter of the push block is larger than the conductor 9 of the cable, and the outer diameter of the push block is larger than the diameter of the insulating layer 1 of the cable; the pushing block 5 is sleeved on the conductor 9 of the cable when being installed. The upper end of the pushing and abutting block 5 abuts against the insulating layer 1 of the cable, and the outer diameter of the pushing and abutting block 5 is larger than the diameter of the insulating layer 1, so that the insulating layer 1 can be pushed completely.

The lower end of the pushing block 5 is provided with an annular flange extending downwards, and the annular flange is arranged along the inner diameter of the pushing block 5; when the fixing device is installed, the upper end of the fixing body is abutted against the lower end of the annular flange; the upper end of the rotating piece 2 abuts against the lower end of the abutting block 5 and the outer wall of the annular flange, so that the position of the rotating piece 2 is limited, and meanwhile, the outer wall of the annular flange plays a role in guiding the movement of the rotating piece 2.

Method of use and principles

Firstly, sleeving a pushing block 5 on a conductor 9 of a cable;

the rotating piece 2 is rotated outside the fixed body through threads;

sleeving the rotating piece 2 and the fixed body on a conductor 9 of the cable, and tightly pushing the pushing block 5;

sleeving the pressing sheet 6 on a conductor 9 of the cable, abutting the end part of the bolt 8 with the pressing sheet 6, and screwing the bolt 8 to enable the pressing sheet 6 to be attached to the conductor 9;

heating an insulator of the cable at 75-85 ℃ for not less than 4h;

after the insulating layer 1 of the cable is heated, the rotating piece 2 is rotated through the handle 7, the rotating piece 2 can push against the pushing piece, and the fixing body is fixed with the conductor 9 through the bolt 8 and the pressing piece 6, so that the insulating layer 1 of the cable is forcibly contracted to a specified distance along the axial direction of the conductor 9 of the cable;

after the insulating layer 1 of the cable shrinks to a fixed distance and one end of the insulating layer is kept for a while, the pushing block 5, the rotating part 2, the fixing body, the bolt 8 and the pressing sheet 6 are removed, and the tool can be mounted on other cables for use and is suitable for cables with different diameters.

Meanwhile, the tool can accurately and uniformly control the insulation retraction distance of the cable; the cable insulation and the conductor 9 are not damaged in the using process; the operation is simple and convenient, and the requirement on operators is low; can be repeatedly used.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a frock that contracts is forced to cable insulation, its characterized in that includes:

a fixing assembly having a fixing body with one end adapted to be fixedly connected with a conductor (9) of a cable;

the rotating piece (2) is movably sleeved on the outer surface of the fixed body; the rotating piece (2) is provided with an abutting end which is suitable for abutting against an insulating layer (1) of the cable;

the fixed body is provided with a fixed end (3) for fixing the conductor (9) and a connecting end (4) for connecting with the rotating piece (2);

the outer surface of the connecting end (4) of the fixed body is provided with an external thread, and the inner surface of the rotating piece (2) is provided with an internal thread matched with the external thread of the fixed body;

the connecting end (4) and the fixed end (3) of the fixed body are connected in a staggered manner to form a blocking step;

the fixing assembly further comprises:

a pressing piece (6) having an arc-shaped surface for abutting against a conductor (9) of a cable; the fixing body is fixedly connected with a conductor (9) of the cable through a bolt (8) and the pressing sheet (6).

2. The cable insulation layer forcible retraction tooling as set forth in claim 1, further comprising:

the pushing block (5) is annular and is suitable for being sleeved on the conductor (9) of the cable; one end of the pushing and abutting block (5) is suitable for abutting against the insulating layer (1) of the cable, and the other end of the pushing and abutting block abuts against the abutting end of the rotating piece (2).

3. The cable insulation layer forcible retraction tooling as claimed in claim 2, wherein the outer diameter of the pushing block (5) is larger than the insulation layer (1) of the cable.

4. The cable insulation layer forced retraction tooling as claimed in claim 2, wherein one end of the pushing and abutting block (5) close to the rotating member (2) is provided with an annular flange; the abutting end of the rotating piece (2) abuts against the annular flange.

5. The fixture for forcibly retracting an insulating layer of a cable according to claim 1, wherein the pressing sheet (6) is provided with at least two pieces, and the pressing sheet is symmetrically attached to the outer surface of a conductor (9) of the cable.

6. The cable insulation layer forcible retraction tooling as set forth in claim 1, further comprising:

and a handle (7) disposed on an outer surface of the rotor (2).