CN101814708B

CN101814708B - Method for pre-expanding cold-shrinking cable accessory

Info

Publication number: CN101814708B
Application number: CN200910111093A
Authority: CN
Inventors: 贾冬霞; 刘建灿
Original assignee: QUANZHOU SEVENSTARS ELECTRIC CO Ltd
Current assignee: Sevenstars Electric Co ltd
Priority date: 2009-02-19
Filing date: 2009-02-19
Publication date: 2012-08-29
Anticipated expiration: 2029-02-19
Also published as: CN101814708A

Abstract

The invention aims to provide a method for pre-expanding a cold-shrinking cable accessory, which comprises the following steps: expanding the cold-shrinking cable accessory by using a steel wire tensioned between two corresponding expansion discs; sleeving a support tube on an expansion bar of which one end is provided with an expansion cone head, and sleeving an end cap at the other end of the expansion bar; pushing the end cap through a cylinder piston so as to forward push the expansion bar and the support tube together along the axial direction of the cable accessory till the expansion cone head of the expansion bar is fully pushed out of the other end of the cable accessory; and finally, removing the end cap, the expansion bar and the steel wire in turn, and shrinking and clasping the cable accessory outside the support tube so as to finish pre-expanding. The cable accessory is expanded by adopting the steel wire, the steel wire material is easily obtained and does not need to be polished, the steel wire is cheaper than a steel bar, and the steel wire for expanding the cable accessory can be pulled out by using mechanical operation, so the labor intensity of operators is lightened, the expanding speed is high and the work efficiency is improved; and the surface of the steel wire has good degree of finish, so the steel wire has little damage to the inner wall of the cold-shrinking cable accessory, ensures the safety of the cable accessory and improves the quality of a product.

Description

A kind of method for pre-expanding of cold-shrinking cable accessory

Technical field

The invention belongs to power equipment attachment technique field, specifically is a kind of method for pre-expanding of cold-shrinking cable accessory.

Background technology

Cold-shrinking cable accessory is a kind of electric power annex of using always; Pre existing expansion cold-shrinking cable accessory mainly is to adopt the steel bar predilation; The shortcoming of steel bar predilation is that the strip material quality requirement is high and also want necessary through strict heat treatment, requires to have higher hardness and definite shape; The surface smoothness to steel bar of most critical requires than higher; If surface smoothness is not carried out the inner surface that just scratches cold-shrinking cable accessory easily, predilation speed also can scratch a product inner surface too soon, causes serious quality problems; And steel bar is not easy to pull out, and labor intensity of operating personnel is bigger, pull out operation at steel bar and the time cause the steel bar fracture again easily, the cost of steel bar than higher, the process-cycle is long, cost is high, directly influences working (machining) efficiency, improves the predilation processing cost.

Summary of the invention

What the present invention will solve is to have now to utilize the existing technical problem of steel bar predilation cold-shrinking cable accessory, and a kind of method for pre-expanding of cold-shrinking cable accessory is provided.

The method for pre-expanding of cold-shrinking cable accessory provided by the invention, it comprises following operating procedure:

A) some steel wires are passed cold-shrinking cable accessory to be expanded, utilize the two ends of the expansion dish difference clamped wire of corresponding intrument on first, second station of workbench in advance;

B) enlarge the Pan Kou and the taut wire of two expansion dishes synchronously, utilize steel wire expansion cold-shrinking cable accessory, the cold-shrinking cable accessory enlarged-diameter to scheduled volume, and is kept the support state of steel wire;

C) have the dilator bar of expanding conehead based on cold-shrinking cable accessory size Selection one end; The stay pipe activity is nested with on the dilator bar of spreader cone back of head; And with the expansion conehead relative sheathed end cap of the dilator bar other end, with the stay pipe pressure holding between expansion conehead and end cap;

The spreader cone head end that d) will be arranged with the dilator bar of stay pipe, end cap inserts in the corresponding port of the cold-shrinking cable accessory that is supported on the steel wire after passing an expansion center hole, and keeps dilator bar and cold-shrinking cable accessory coaxial line layout;

E) start the cylinder of arranging with the cold-shrinking cable accessory coaxial line that is supported on the steel wire on the device busy platform in advance; Promote end cap through overhanging cylinder piston dilator bar and stay pipe are axially pushed forward along cold-shrinking cable accessory in the lump, release the other end of cold-shrinking cable accessory until the spreader cone epicranium of dilator bar fully;

F) end cap on the dilator bar is removed, and pulled out dilator bar through the expansion conehead;

G) lay down steel wire on the expansion dish, extract steel wire, cold-shrinking cable accessory bounces back obvolvent automatically outside stay pipe, and so far predilation finishes.

Above-mentioned method for pre-expanding adopts steel wire to support cold-shrinking cable accessory, and wire material obtains easily, need not polish, and price is more cheap than steel bar; Mechanical work capable of using is pulled out the steel wire that supports cold-shrinking cable accessory; Alleviate labor intensity of operating personnel, expansion rate is fast, improves operating efficiency; And the surface smoothness of steel wire is good, and is little to the damage of cold-shrinking cable accessory inwall, guarantees the safety of cold-shrinking cable accessory, improves the quality of products.

Description of drawings

Below in conjunction with accompanying drawing the utility model is done further explain.

Fig. 1 is the sketch map of method for pre-expanding steel wire expansion cold-shrinking cable accessory of the present invention.

Fig. 2 is method for pre-expanding cylinder of the present invention pushes stay pipe through dilator bar a sketch map.

Fig. 3 is the sketch map of cold-shrinking cable accessory obvolvent stay pipe after method for pre-expanding predilation of the present invention is accomplished.

Embodiment

Referring to figs. 1 through Fig. 3.The method for pre-expanding of cold-shrinking cable accessory provided by the invention, it comprises following operating procedure:

A) some steel wires 1 are passed cold-shrinking cable accessory to be expanded 2, utilize

expansion dish

31,32 two ends of clamped wire 1 respectively on first, second station of device busy platform in advance;

B) enlarge the Pan Kou of

expansion dish

31,32 and strain all steel wires 1 synchronously, utilize steel wire 1 expansion cold-shrinking cable accessory 2 (referring to Fig. 1);

C) have the dilator bar 4 of expanding conehead 41 based on cold-shrinking cable accessory 2 size Selection one end; Stay pipe 5 activities are nested with on the dilator bar at expansion conehead 41 rear portions; And with the relative sheathed end cap 6 of dilator bar 4 other ends of expansion conehead 41, with stay pipe 5 pressure holdings between expansion conehead 41 and end cap 6 (referring to Fig. 2);

Expansion conehead 41 ends that d) will be arranged with the dilator bar of stay pipe 5, end cap 6 pass expansion and coil to insert behind 31 centre bores and be supported in the cold-shrinking cable accessory 2 corresponding ports on the steel wire 1, and keep dilator bar 4 and cold-shrinking cable accessory 2 coaxial lines to arrange (referring to Fig. 2);

E) start the cylinder of arranging with cold-shrinking cable accessory 2 coaxial lines that are supported on the steel wire 1 on the device busy platform in advance 7; Promote end cap 6 through overhanging cylinder piston 71 dilator bar 4 and stay pipe 5 are axially pushed forward along cold-shrinking cable accessory 2 in the lump, released expansion fully until the conehead 41 of dilator bar and coil outside 32 centre bores;

F) end cap on the dilator bar 46 is removed, and pulled out dilator bar 4 through expansion conehead 41;

G) lay down all steel wires 1 on the

expansion dish

31,32; And all steel wires 1 are extracted; Cold-shrinking cable accessory 2 bounces back obvolvent automatically outside stay pipe 5; So far predilation finishes, and just obtains the cold-shrinking cable accessory 2 of obvolvent outside stay pipe 5 behind the predilation shown in Fig. 3, and stay pipe 5 works the effect of supporting makes cold-shrinking cable accessory 2 keep expansion states.

Above-mentioned end cap also can be employed in an affixed diameter on the cylinder piston termination and replace greater than the platen of stay pipe, utilizes end cap, platen can realize equally the stay pipe that activity is nested with on dilator bar is pushed in the cold-shrinking cable accessory of expansion state.

The above is merely preferred embodiment of the present invention, so can not limit the scope that the present invention implements with this, the equivalence of promptly doing according to claim of the present invention and description changes and modifies, and all should still belong in the scope that patent of the present invention contains.

Claims

1. the method for pre-expanding of a cold-shrinking cable accessory, it comprises following operating procedure:

A) some steel wires are passed cold-shrinking cable accessory to be expanded, utilize the corresponding in advance two ends that are installed in the expansion dish difference clamped wire on first, second station of workbench;

B) enlarge the Pan Kou and the taut wire of two expansion dishes synchronously, utilize steel wire to support cold-shrinking cable accessory;

E) start the cylinder that is installed on the workbench in advance and is supported in the cold-shrinking cable accessory coaxial line layout on the steel wire; Through overhanging cylinder piston promote end cap with dilator bar and stay pipe in the lump along axially propelling movement forward of cold-shrinking cable accessory, release the other end of cold-shrinking cable accessory fully until the spreader cone epicranium of dilator bar at least;

G) lay down steel wire on the expansion dish, extract steel wire, the obvolvent of cold-shrinking cable accessory retraction is outside stay pipe, and so far predilation finishes.

2. method for pre-expanding according to claim 1 is characterized in that: among the said step e, the spreader cone epicranium of dilator bar is released outside another expansion center hole fully.