CN105337137B - Expansion tool and the method for connecting the first and second cables - Google Patents

Abstract

The invention discloses an expansion tool for an intermediate insulating joint, which comprises two sets of expansion components and two sets of tensioning mechanisms. Two sets of expansion assemblies are respectively arranged at both ends of the intermediate insulating joint, and each set of expansion assemblies includes: an expansion piece, a clamping piece and a guide piece. Two sets of tensioning mechanisms are arranged on both sides of the two sets of expansion assemblies respectively, and each set of tensioning mechanisms is connected to the clamping parts of the two sets of expansion assemblies. The cylindrical protrusion of the guide is inserted into the cylindrical protrusion of the dilator, and the tapered head of the cylindrical protrusion protrudes from the cylindrical protrusion. After the tapered head of the guide is inserted into the inner hole of the intermediate insulating joint, when the two sets of tensioning mechanisms pull the two sets of expansion assemblies toward each other, the cylindrical protrusion of the expansion is on the guide. Guided by the tapered head, it is inserted into the inner hole of the intermediate insulating joint, thereby enlarging the inner hole of the intermediate insulating joint. Therefore, the expansion tool of the present invention is simple in structure, light in weight, easy to carry, and can be installed very conveniently.

Description

Expansion tool and method of connecting first and second cables

technical field

The invention relates to an expanding tool for expanding the bore of an intermediate insulating joint, and a method for electrically connecting a first cable and a second cable.

Background technique

When terminating the first high-voltage cable and the second high-voltage cable, the conductor core of the first high-voltage cable and the conductor core of the second high-voltage cable are generally crimped together with a metal crimping tube, and then an intermediate insulating joint is set on the At the termination of the first high-voltage cable and the second high-voltage cable, the intermediate insulating joint is shrunk on the metal crimping tube and a part of the insulation layer of the first and second high-voltage cables, thereby realizing the connection between the first high-voltage cable and the second high-voltage cable The insulation recovery at the termination improves the electrical safety at the termination.

In order to tightly fit the intermediate insulating joint on the first high-voltage cable and the second high-voltage cable, the inner hole of the intermediate insulating joint must be smaller than the diameter of the metal crimping tube or the first high-voltage cable and the second high-voltage cable are coated on the conductor core The diameter of the insulating layer. Therefore, the inner hole of the intermediate insulating joint must be expanded before the intermediate insulating joint can be sleeved on the first high-voltage cable and the second high-voltage cable.

In the prior art, a hydraulic expansion mechanism is generally used to expand the inner hole of the intermediate insulating joint. However, the hydraulic expansion mechanism has technical problems such as heavy weight, difficult installation, high price, easy oil leakage and inconvenient maintenance.

Contents of the invention

The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and deficiencies in the prior art.

An object of the present invention is to provide an expanding tool for expanding the inner hole of an intermediate insulating joint, which is light in weight and easy to carry.

Another object of the present invention is to provide an expansion tool for expanding the inner hole of an intermediate insulating joint, which is easy to install and does not require other auxiliary mechanical devices.

Another object of the present invention is to provide an expansion tool for expanding the inner hole of an intermediate insulating joint, which has a simple structure and is inexpensive.

Another object of the present invention is to provide an expansion tool for expanding the inner hole of an intermediate insulating joint, which does not require the use of hydraulic oil, so there is no problem of oil leakage.

Another object of the present invention is to provide an expanding tool for expanding the inner hole of an intermediate insulating joint, which has fewer parts and is easy to maintain.

According to one aspect of the present invention, an expansion tool for an intermediate insulating joint is provided, including two sets of expansion assemblies and two sets of tensioning mechanisms. Two sets of expansion assemblies are respectively arranged at both ends of the intermediate insulating joint, and each set of expansion assembly includes: an expansion piece with a cylindrical protrusion for expanding the inner hole of the intermediate insulation joint; a clamping piece for clamping an expander; and a guide mounted to the expander having a cylindrical protrusion with a tapered head. Two sets of tensioning mechanisms are respectively arranged on both sides of the two sets of expansion assemblies, and each set of tensioning mechanisms is connected to the clamping parts of the two sets of expansion assemblies. The cylindrical protrusion of the guide is inserted into the cylindrical protrusion of the dilator, and the tapered head of the cylindrical protrusion protrudes from the cylindrical protrusion. After the tapered heads of the guides of the two sets of expansion assemblies are respectively inserted into the inner holes of the intermediate insulating joints from both ends, when the two sets of tensioning mechanisms pull the two sets of expansion assemblies toward the direction of mutual approach, the two sets of expansion assemblies The cylindrical protrusion of the expansion part is inserted into the inner hole of the intermediate insulating joint under the guidance of the tapered head of the guide, thereby enlarging the inner hole of the intermediate insulating joint.

According to an exemplary embodiment of the present invention, each tensioning mechanism includes: a tensioning belt connected to the clamping parts of the two expansion assemblies; and a tensioner installed on the tensioning belt, Used to tighten or loosen the tensioning strap.

According to another exemplary embodiment of the present invention, the expander includes a disc-shaped base that is approximately perpendicular to the cylindrical protrusion and is connected to each other; the guide includes a disc-shaped base that is approximately perpendicular to the cylindrical protrusion and is connected to each other ; and the disc-shaped base of the guide is connected to the disc-shaped base of the expansion member by a threaded connection.

According to another exemplary embodiment of the present invention, a tapered guide edge is formed on the end of the cylindrical protrusion of the expansion member for guiding the cylindrical protrusion of the expansion member into the intermediate insulating joint. in the inner hole.

According to another exemplary embodiment of the present invention, each expansion member is composed of a first expansion half body and a second expansion half body; and the first expansion half body and the second expansion half body are clamped The fasteners are clamped together to form a complete expansion.

According to another exemplary embodiment of the present invention, each of the clamping members includes: a first annular half body; and a second annular half body, the first annular half body and the second annular half body mutually Assembled together and clamped on the outer circumference of the disc-shaped base of the expander.

According to another exemplary embodiment of the present invention, first connecting protrusions are respectively formed on both sides of the first annular half body; second connecting protrusions are respectively formed on both sides of the second annular half body; And the first connecting protrusion and the second connecting protrusion are connected to each other through bolts and nuts.

According to another exemplary embodiment of the present invention, after the first annular half body and the second annular half body are assembled together, the bolts located on the first connecting protrusion and the second connecting protrusion A portion between them is exposed; each tension band is wrapped around the exposed portion of the corresponding two bolts.

According to another exemplary embodiment of the present invention, after the expansion tool is installed on the intermediate insulating joint and the inner hole of the intermediate insulating joint is expanded, the guide is removed from the expansion piece, so that the expansion tool and The intermediate insulating joint is sleeved on one end of the first cable, so that one end of the first cable passes through the cylindrical protrusion of the expansion tool and the inner hole of the intermediate insulating joint.

According to another exemplary embodiment of the present invention, after the expansion tool and the intermediate insulating joint are set on one end of the first cable, the conductor core on one end of the first cable and the conductor core on one end of the second cable They are electrically connected to each other through electrical connectors.

According to another exemplary embodiment of the present invention, the electrical connector is a metal crimping tube, and the metal crimping tube is crimped on the conductor core on one end of the first cable and the conductor core on one end of the second cable .

According to another exemplary embodiment of the present invention, after the conductor cores of the first cable and the conductor cores of the second cable are electrically connected together, the intermediate insulating joint and the expansion tool installed thereon are moved until the The electrical connector is fully received into the inner bore of the intermediate insulating joint.

According to another exemplary embodiment of the present invention, after the electrical connector is completely accommodated in the inner hole of the intermediate insulating joint, the expansion tool is removed from the intermediate insulating joint, so that the intermediate insulating joint shrinks The electrical connector and a portion of the insulating layer of the first and second cables on both sides of the electrical connector.

According to another exemplary embodiment of the present invention, the outer diameter of the cylindrical protrusion of the guide member is approximately equal to the inner diameter of the cylindrical protrusion of the expansion member.

According to another exemplary embodiment of the present invention, the first expansion half body of the expansion member is integrated with the first annular half body of the clamping member; and the second expansion half body of the expansion member is integrated with the first ring half body of the clamping member. The second annular half of the clamping member is formed in one piece.

According to another aspect of the present invention, there is provided a method for connecting a first cable and a second cable, comprising the steps of:

Provide an intermediate insulating joint;

providing a dilation tool according to any one of the preceding embodiments;

Installing the expansion tool on the intermediate insulating joint, and using the expansion tool to expand the inner hole of the intermediate insulating joint;

removing the guide from the expander;

Set the expansion tool and the intermediate insulating joint (40) on one end of the first cable (10), so that one end of the first cable passes through the cylindrical protrusion of the expansion tool and the inner hole of the intermediate insulating joint;

electrically connecting the conductor cores on one end of the first cable to the conductor cores on one end of the second cable with an electrical connector;

moving the intermediate insulating joint and the expansion tool mounted thereon until the electrical connector is fully received within the inner bore of the intermediate insulating joint; and

The expansion tool is removed from the intermediate insulating joint such that the intermediate insulating joint shrinks over the electrical connector and a portion of the insulation of the first and second cables on either side of the electrical connector.

In the expansion tool according to various embodiments of the present invention, the expansion tool includes two sets of expansion components and two sets of tensioning mechanisms, and each set of expansion components includes an expansion part, a clamping part and a guiding part. Therefore, its structure is simple, light in weight, and easy to carry. In addition, the entire expansion tool can be assembled together conveniently by hand without using other auxiliary mechanical devices, so the installation is very convenient.

Other objects and advantages of the present invention will be apparent from the following description of the present invention with reference to the accompanying drawings, and may help to provide a comprehensive understanding of the present invention.

Description of drawings

Figure 1 shows a schematic diagram of an expansion tool installed on an intermediate insulating joint according to an exemplary embodiment of the present invention, wherein the tension band of the expansion tool has not been fully tensioned, and the cylindrical protrusion of the expansion part of the expansion tool It has not been inserted into the inner hole of the intermediate insulating joint;

Fig. 2 shows a schematic perspective view of the expansion part and the clamping part of the expansion tool shown in Fig. 1, wherein the clamping part is clamped on the expansion part;

Figure 3 shows a schematic perspective view of the expansion part of the expansion tool shown in Figure 1;

Figure 4 shows a schematic perspective view of a guide of the expansion tool shown in Figure 1;

5 shows a schematic diagram of the expansion tool after the tension band of the expansion tool has been fully tensioned and the cylindrical protrusion of the expansion part of the expansion tool has been inserted into the inner hole of the intermediate insulating joint, wherein the guide part of the expansion tool has been removed;

Figure 6 shows a plan view of the expansion tool shown in Figure 5 together with an intermediate insulating joint;

Figure 7 shows a schematic diagram of putting the expansion tool and the intermediate insulating joint on one end of the first cable, so that one end of the first cable passes through the cylindrical protrusion of the expansion tool and the inner hole of the intermediate insulating joint;

8 shows a schematic diagram of electrically connecting the conductor core of one end of the first cable having passed through the expansion tool and the intermediate insulating joint with the conductor core of the second cable;

Figure 9 shows a schematic diagram of moving the expansion tool and the intermediate insulating joint to the electrical connector after the conductor core at one end of the first cable is electrically connected to the conductor core of the second cable; and

Figure 10 shows a schematic view of the interconnected first and second electrical cables after moving the expansion tool and the intermediate insulating joint to the electrical connection and removing the expansion tool from the intermediate insulating joint.

detailed description

The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals designate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, but should not be construed as a limitation of the present invention.

In addition, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a comprehensive understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagrammatic form to simplify the drawings.

According to a general concept of the present invention, an expansion tool for an intermediate insulating joint is provided, which includes two sets of expansion assemblies and two sets of tensioning mechanisms. Two sets of expansion assemblies are respectively arranged at both ends of the intermediate insulating joint, and each set of expansion assembly includes: an expansion piece with a cylindrical protrusion for expanding the inner hole of the intermediate insulation joint; a clamping piece for clamping an expander; and a guide mounted to the expander having a cylindrical protrusion with a tapered head. Two sets of tensioning mechanisms are respectively arranged on both sides of the two sets of expansion assemblies, and each set of tensioning mechanisms is connected to the clamping parts of the two sets of expansion assemblies. The cylindrical protrusion of the guide is inserted into the cylindrical protrusion of the dilator, and the tapered head of the cylindrical protrusion protrudes from the cylindrical protrusion. After the tapered heads of the guides of the two sets of expansion assemblies are respectively inserted into the inner holes of the intermediate insulating joints from both ends, when the two sets of tensioning mechanisms pull the two sets of expansion assemblies toward the direction of mutual approach, the two sets of expansion assemblies The cylindrical protrusion of the expansion part is inserted into the inner hole of the intermediate insulating joint under the guidance of the tapered head of the guide, thereby enlarging the inner hole of the intermediate insulating joint.

1 shows a schematic diagram of an expansion tool installed on an intermediate insulating joint 40 according to an exemplary embodiment of the present invention, wherein the tension band 400 of the expansion tool has not been fully tensioned, and the barrel of the expansion part 100 of the expansion tool The shape protrusion 110 has not been inserted into the inner hole of the intermediate insulating joint 40 yet.

As shown in FIG. 1 , in an exemplary embodiment of the present invention, the expansion tool used to expand the inner hole (not shown) of the intermediate insulating joint 40 mainly includes two sets of expansion components and two sets of tensioning mechanisms.

As shown in FIG. 1 , in the illustrated embodiment, each expansion assembly includes an expansion piece 100 , a clamping piece 200 and a guide piece 300 assembled together. Two sets of expansion assemblies are respectively arranged at both ends of the intermediate insulating joint 40 .

As shown in FIG. 1 , in the illustrated embodiment, each tensioning mechanism includes a tensioning belt 400 and a tensioner 500 . Two sets of tensioning mechanisms are arranged on both sides of the two sets of expansion components (or both sides of the intermediate insulating joint 40), and each set of tensioning mechanisms is connected to the clamping parts of the two sets of expansion components for tensioning the two sets of expansion components. components.

Fig. 2 shows the three-dimensional schematic view of the expansion part 100 and the clamping part 200 of the expansion tool shown in Fig. 1, wherein, the clamping part 200 is clamped on the expansion part 100; Fig. 3 shows the expansion part 100 shown in Fig. 1 A three-dimensional schematic view of the dilation member 100 ; FIG. 4 shows a three-dimensional schematic view of the guide member 300 of the dilation tool shown in FIG. 1 .

As shown in FIGS. 1 to 4 , in an exemplary embodiment of the present invention, the expansion member 100 has a cylindrical protrusion 110 for expanding the inner hole of the intermediate insulating joint 40 . The clamping member 200 is ring-shaped for clamping on the disc-shaped base of the expansion member 100 . The guide 300 is mounted to the dilator 100 and has a cylindrical protrusion 310 with a tapered head 311 .

As clearly shown in FIG. 1 , each tensioning band 400 is connected to the clamping members 200 of two expansion assemblies. The tensioner 500 is installed on the tension belt 400 for tightening or loosening the tension belt 400 . In the present invention, the tensioner 500 can be any belt tensioner in the prior art.

1 to 4, in the illustrated embodiment, the cylindrical protrusion 310 of the guide 300 is inserted into the cylindrical protrusion 110 of the dilator 100, and the tapered head 311 of the cylindrical protrusion 310 emerges from the cylindrical Protrusions 110 protrude. In this way, after the expansion tool is installed on the intermediate insulating joint 40 , the tapered heads 311 of the guides 300 of the two expansion assemblies are respectively inserted into the inner holes of the intermediate insulating joint 40 from both ends. At this time, when the two sets of tensioning mechanisms tighten the two sets of expansion assemblies towards each other, the cylindrical protrusion 110 of the expansion piece 100 will be smoothly inserted into the intermediate insulation under the guidance of the tapered head 311 of the guide piece 300. In the inner hole of the joint 40, thereby expanding the inner hole of the intermediate insulating joint 40.

Please continue to refer to FIGS. 1 to 4 , in the illustrated embodiment, the expansion member 100 includes a disc-shaped base that is substantially perpendicular to the cylindrical protrusion 110 and connected to each other. The guide 300 includes a disk-shaped base substantially perpendicular to the columnar protrusion 310 and connected to each other. The disc-shaped base of the guide 300 is connected to the disc-shaped base of the dilator 100 by a threaded connection 301 .

As clearly shown in FIG. 3 , in an exemplary embodiment of the present invention, a tapered guide edge 111 is formed on the end of the cylindrical protrusion 110 of the dilator 100 for guiding the cylindrical protrusion 110 of the dilator 100 . The riser 110 enters the inner hole of the intermediate insulating joint 40.

As shown in FIGS. 2 and 3 , in the illustrated embodiment, each expansion member 100 is composed of a first expansion half body 100 a and a second expansion half body 100 b; and the first expansion half body 100 a and the second expansion half body The body 100b is clamped together by the clamping member 200 to form a complete expansion member 100 .

As shown in Fig. 2 and Fig. 3, in an exemplary embodiment of the present invention, each clamping member 200 includes: a first annular half body 200a and a second annular half body 200b. The first annular half body 200 a and the second annular half body 200 b are assembled with each other and clamped on the outer circumference of the disc-shaped base of the dilator 100 .

As shown in Figure 2 and Figure 3, in an exemplary embodiment of the present invention, first connecting protrusions 210a are respectively formed on both sides of the first annular half body 200a; A second connection protrusion 210b is formed; and the first connection protrusion 210a and the second connection protrusion 210b are connected to each other by a bolt 220 and a nut 230 .

As shown in Fig. 1, Fig. 2 and Fig. 3, in an exemplary embodiment of the present invention, after the first annular half body 200a and the second annular half body 200b are assembled together, the bolt 220 is located at the first A portion between the connection protrusion 210a and the second connection protrusion 210b is exposed. Each tension band 400 is wound on the exposed portions of the corresponding two bolts 220 .

5 shows a schematic diagram of the expansion tool after the tensioning band 400 of the expansion tool has been fully tensioned and the cylindrical protrusion 110 of the expansion part 100 of the expansion tool has been inserted into the inner hole of the intermediate insulating joint 40, wherein the guide of the expansion tool Piece 300 has been removed. FIG. 6 shows a plan view of the expansion tool shown in FIG. 5 together with the intermediate insulating joint 40 .

As shown in Figures 5 and 6, in an exemplary embodiment of the present invention, after the expansion tool is installed on the intermediate insulating joint 40 and expands the inner hole of the intermediate insulating joint 40, it is removed from the expansion member 100 The guide 300 is used to insert one end of the first cable 10 into the cylindrical protrusion 110 and pass through the inner hole of the intermediate insulating joint 40 (see FIG. 7 ).

Figure 7 shows that the expansion tool and the intermediate insulating joint 40 are sleeved on one end of the first cable 10, so that one end of the first cable 10 (has been stripped and cut, exposing a section of conductor core 12 and exposing a section for coating A schematic diagram of the insulating layer 11) on the conductor core 12 passing through the cylindrical protrusion 110 of the expansion tool and the inner hole of the intermediate insulating joint 40 shown in FIG. 6 .

As shown in FIG. 7, in one embodiment of the present invention, after the intermediate insulating joint 40 is expanded by the expansion tool, and after the guide 300 is removed from the expansion tool, the expansion tool and the intermediate insulating joint 40 are set on the first cable. 10, so that one end of the first cable 10 passes through the expansion tool and the intermediate insulating joint 40 shown in FIG. 6 .

FIG. 8 shows a schematic diagram of electrically connecting the conductor core 12 at one end of the first cable 10 and the conductor core 22 at one end of the second cable 20 that have passed through the expansion tool and the intermediate insulating joint 40 .

As shown in FIG. 8, in one embodiment of the present invention, after one end of the first cable 10 has passed through the expansion tool shown in FIG. The stripping and cutting process exposes a section of conductor core 22 and exposes a section of conductor core 22 for covering an insulating layer 21) on the conductor core 22 and the conductor core 12 of one end of the first cable 10 through an electrical connector 30. are electrically connected together, so as to realize the electrical connection between the first cable 10 and the second cable 20 .

In an exemplary embodiment of the present invention, the electrical connector 30 can be a metal crimping tube, and the metal crimping tube is crimped on the conductor core 12 on one end of the first cable 10 and the conductor on one end of the second cable 20 Core 22 on.

9 shows a schematic diagram of moving the expansion tool and the intermediate insulating joint 40 to the electrical connector 30 after the conductor core 12 at one end of the first cable 10 is electrically connected to the conductor core 22 of the second cable 20 .

As shown in FIG. 9, in one embodiment of the present invention, after the conductor core 12 at one end of the first cable 10 is electrically connected to the conductor core 22 at one end of the second cable 20, along the arrow in FIG. Move the expansion tool and the intermediate insulating joint 40 to the electrical connector 30 in the direction shown until the electrical connector 30 is completely accommodated in the inner hole of the intermediate insulating joint 40 .

FIG. 10 shows a schematic view of the interconnected first and second electrical cables 10 , 20 after moving the expansion tool and the intermediate insulating joint 40 to the electrical connection 30 and removing the expansion tool from the intermediate insulating joint 40 .

As shown in FIG. 10 , in one embodiment of the present invention, after the expansion tool and the intermediate insulating joint 40 are moved to the electrical connector 30, the expansion tool is removed from the intermediate insulating joint 40, so that the intermediate insulating joint 40 elastically recovers. And tightly shrunk on the electrical connector 30 and a part of the insulation layer 11, 21 of the first and second cables 10, 20 on both sides of the electrical connector 30, thereby realizing the realization of the first cable 10 and the second cable 20 Insulation recovery at the terminal connection improves the electrical safety at the terminal connection.

In an exemplary embodiment of the present invention, the outer diameter of the cylindrical protrusion 310 of the guide member 300 is equal to, slightly larger than, or slightly smaller than the inner diameter of the cylindrical protrusion 110 of the expansion member 100 . In this way, after the expansion piece 100 is clamped by the clamping piece 200, the outer surface of the cylindrical protrusion 310 of the guide 300 inserted into the cylindrical protrusion 110 of the expansion piece 100 can be made to be in contact with the cylindrical protrusion 110 of the expansion piece 100. close contact with the inner surface.

In the embodiment shown in FIGS. 1 to 10 , both the expansion piece 100 and the clamping piece 200 are assembled from two halves, and the two halves 100a, 100b of the expansion piece 100 are combined with the two halves of the clamping piece 200 The two halves 200a, 200b are separated from each other. However, the present invention is not limited to the illustrated embodiment. For example, in another exemplary embodiment of the present invention, the first expansion half body 100a of the expansion member 100 and the first annular half body 200a of the clamping member 200 It can be formed as one body; and the second expansion half body 100b of the expansion member 100 and the second annular half body 200b of the clamping member 200 can also be formed as one body. Next, with reference to FIGS. 1 to 10 , the method for electrically connecting the first cable 10 and the second cable 20 will be described in detail. The method mainly includes the following steps:

S101: As shown in FIG. 1 , provide an intermediate insulating joint 40;

S102: As shown in FIG. 1 , provide the expansion tool as mentioned above;

S103: As shown in Figure 1, Figure 5 and Figure 6, install the expansion tool on the intermediate insulating joint 40, and use the expansion tool to expand the inner hole of the intermediate insulating joint 40;

S104: As shown in Fig. 5 and Fig. 6, remove the guide part 300 from the expansion part 100;

S105: As shown in FIG. 7, put the expansion tool and the intermediate insulating joint 40 on one end of the first cable 10, so that one end of the first cable 10 passes through the cylindrical protrusion 110 of the expansion tool and the middle insulating joint 40. Bore;

S106: As shown in FIG. 8 , electrically connect the conductor core 12 on one end of the first cable 10 and the conductor core 22 on one end of the second cable 20 with an electrical connector 30;

S107: As shown in FIG. 9 , move the intermediate insulating joint 40 and the expansion tool installed thereon until the electrical connector 30 is completely accommodated in the inner hole of the intermediate insulating joint 40 ; and

S108: As shown in FIG. 10 , remove the expansion tool from the intermediate insulating joint 40, so that the intermediate insulating joint 40 shrinks a part of the insulating layer of the first and second cables 10, 20 on both sides of the electrical connector 30 and the electrical connector 30 11, 21.

Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can improve them, and the structures described in various embodiments do not conflict with each other in terms of structure or principle Can be combined freely.

Although the present invention has been described with reference to the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation of the present invention.

While certain embodiments of the present general inventive concept have been shown and described, it will be understood by those of ordinary skill in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept. The scope is defined by the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Furthermore, any element references in the claims should not be construed as limiting the scope of the invention.

Claims (14)

1. A kind of 1. expansion tool of intermediate insulation joint, it is characterised in that including：

   Two sets of Stent assemblies (100,200,300), are separately positioned on the both ends of intermediate insulation joint (40), often cover Stent assembly (100,200,300) include：

   One expansion part (100), have the tubular for the endoporus for being used to expand intermediate insulation joint (40) raised (110)；

   One clamping element (200), for clamping expansion part (100)；With

   One guiding piece (300), is installed on expansion part (100), has columnar projections (310), and the columnar projections (310) With conical nose (311), and

   Two sets of strainers (400,500), the both sides of two sets of Stent assemblies (100,200,300) are separately positioned on, often set tensioning Mechanism (400,500) is connected on the clamping element (200) of two sets of Stent assemblies (100,200,300), wherein,

   The columnar projections (310) of the guiding piece (300) are inserted in the tubular raised (110) of the expansion part (100), and post The conical nose (311) of shape projection (310) is prominent from tubular raised (110),

   Inserted respectively from both ends in the conical nose (311) of the guiding piece (300) of two sets of Stent assemblies (100,200,300) Between insulating joint (40) endoporus in after, expand when two sets of strainers (400,500) tense two sets towards direction close to each other During component (100,200,300), the conical nose of the tubular raised (110) of the expansion part (100) in guiding piece (300) (311) in the endoporus of the lower insertion intermediate insulation joint (40) of guiding, so as to expand the endoporus of intermediate insulation joint (40).
2. 2. expansion tool according to claim 1, it is characterised in that often covering strainer (400,500) includes：

   One tension band (400), it is connected on the clamping element (200) of two sets of Stent assemblies (100,200,300)；With

   One stretcher (500), on the tension band (400), for tightening up or loosening the tension band (400).
3. 3. expansion tool according to claim 2, it is characterised in that

   The expansion part (100) includes disc shaped base that is substantially vertical with tubular raised (110) and being connected with each other；

   The guiding piece (300) includes disc shaped base that is substantially vertical with columnar projections (310) and being connected with each other；

   The disc shaped base of the guiding piece (300) is connected through a screw thread the plate-like that part (301) is connected to the expansion part (100) On base portion.
4. 4. expansion tool according to claim 3, it is characterised in that

   Formed with tapered leading edge (111) on the end of the tubular of the expansion part (100) raised (110), for guiding The tubular raised (110) for stating expansion part (100) enters in the endoporus of the intermediate insulation joint (40).
5. 5. expansion tool according to claim 4, it is characterised in that

   Each expansion part (100) is made up of the first expansion halfbody (100a) and the second expansion halfbody (100b)；And

   The first expansion halfbody (100a) and the second expansion halfbody (100b) are clamped in one by the clamping element (200) Rise, to form a complete expansion part (100).
6. 6. expansion tool according to claim 5, it is characterised in that

   Each clamping element (200) includes：

   First annular halfbody (200a)；With

   Second annular halfbody (200b),

   The first annular halfbody (200a) and the second annular halfbody (200b) are assembled to each other, and are clamped in expansion On the excircle of the disc shaped base of part (100).
7. 7. expansion tool according to claim 6, it is characterised in that

   The both sides of the first annular halfbody (200a) are respectively formed with the first connection bump (210a)；

   The both sides of the second annular halfbody (200b) are respectively formed with the second connection bump (210b)；And

   First connection bump (210a) and the second connection bump (210b) are interconnected on by bolt (220) and nut (230) Together.
8. 8. expansion tool according to claim 7, it is characterised in that

   After the first annular halfbody (200a) and the second annular halfbody (200b) are assembled to each other, the spiral shell The part between the first connection bump (210a) and the second connection bump (210b) of bolt (220) is exposed；

   Each tension band (400) is wrapped in the part exposed of corresponding two bolts (220).
9. 9. expansion tool according to claim 8, it is characterised in that

   After the expansion tool and intermediate insulation joint (40) set are attached on one end of the first cable (10), the first cable (10) conductor cores (12) on one end pass through electrical connector (30) phase with the conductor cores (22) on one end of the second cable (20) Mutually it is electrically connected.
10. 10. expansion tool according to claim 9, it is characterised in that

    The electrical connector (30) is metal crimp pipe, and the metal crimp pipe is crimped on leading on one end of the first cable (10) In conductor cores (22) on one end of body core (12) and the second cable (20).
11. 11. expansion tool according to claim 1, it is characterised in that

    The tubular that the external diameter of the columnar projections (310) of the guiding piece (300) is substantially equal to the expansion part (100) is raised (110) internal diameter.
12. 12. expansion tool according to claim 6, it is characterised in that

    The first annular halfbody (200a) of the first expansion halfbody (100a) and the clamping element (200) of the expansion part (100) Formation is integrated；And

    Second annular halfbody (200b) of the second expansion halfbody (100b) and the clamping element (200) of the expansion part (100) Formation is integrated.
13. 13. one kind is used for the method for connecting the first cable (10) and the second cable (20), comprise the following steps：

    One intermediate insulation joint (40) is provided；

    Expansion tool as any one of claim 1-12 is provided；

    The expansion tool is installed on intermediate insulation joint (40), and uses expansion tool by intermediate insulation joint (40) Endoporus expands；

    The guiding piece (300) is removed from the expansion part (100)；

    Expansion tool and intermediate insulation joint (40) set are attached on one end of the first cable (10) so that the first cable (10) One end passes through the tubular raised (110) of expansion tool and the endoporus of intermediate insulation joint (40)；

    With electrical connector (30) by one end of the conductor cores (12) on one end of the first cable (10) and the second cable (20) Conductor cores (22) are electrically connected；

    The mobile intermediate insulation joint (40) and expansion tool mounted thereto, until the electrical connector (30) is complete It is received into entirely in the endoporus of intermediate insulation joint (40)；With

    The expansion tool is removed from the intermediate insulation joint (40) so that intermediate insulation joint (40) is contracted in electrical connection On a part of insulating barrier (11,21) of part (30) and first and second cables (10,20) of electrical connector (30) both sides.
14. 14. according to the method for claim 13, it is characterised in that：

    The electrical connector (30) is metal crimp pipe, and the metal crimp pipe is crimped on leading on one end of the first cable (10) In conductor cores (22) on one end of body core (12) and the second cable (20).