CN201215878Y - Traction head for electric cable - Google Patents
Traction head for electric cable Download PDFInfo
- Publication number
- CN201215878Y CN201215878Y CNU2008200383988U CN200820038398U CN201215878Y CN 201215878 Y CN201215878 Y CN 201215878Y CN U2008200383988 U CNU2008200383988 U CN U2008200383988U CN 200820038398 U CN200820038398 U CN 200820038398U CN 201215878 Y CN201215878 Y CN 201215878Y
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- cavity
- drawing head
- cable
- cable drawing
- holding
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Abstract
The utility model relates to an improvement of a cable drawing head, which is characterized in that a plunger hole is arranged on the front end of a cavity of a hollow drawing head, a screw bolt pushing piston is arranged in the plunger hole, the cavity and the plunger hole are filled with and closed with hydraulic pressure medium, which enables a cable conductor grasping metallic press-connect-tube to be in a hydraulic cavity, the cavity is changed through screwing and pushing into the piston, enables the hydraulic medium to pressurize the section of the metallic press-connect-tube, which is inserted into the cable conductor, thereby generating the rigid deformation to grasp the cable conductor, the structural cable drawing head can be installed and used on sites without any hydraulic pressure devices, the installation and the use are convenient, and the laying of cables is very convenient, and the metallic press-connect-tube is a pressed by a non-plastic deforming force, when the drawing is finished, the recovering the disappearing of the cavity hydraulic pressure, the rigid deformation can be recovered, thereby the cable drawing head can be repeatedly used for multiple times, and the cable drawing heads are greatly saved.
Description
Technical field
Utility model is about the improvement to cable drawing head, relates in particular to a kind of auxiliary equipment that need not and on-the-spot just can assemble laying, and can reusable cable drawing head.
Background technology
Installation is dragged and is established for example trench laying of cable, and mode is to install drawing head additional at cable socket usually, by tractive drawing head tractive cable.The prior art cable drawing head, for example Chinese patent CN2606976, CN2606977, the described cable drawing head of CN200962506, its basic structure is: be bolted with to hold in the hollow traction cap and connect cable metal aluminium hydraulic pressed connecting pipe (also claiming the metal adapter sleeve), be that the traction cap openend has internal thread, hold and meet cable metal Guan Yiduan external screw thread is arranged, pressurizing and deformation is held with a firm grip behind the cable, by screw thread and traction cap combination.Cable install additional drawing head be in factory by for example hydraulic test of holding with a firm grip, the metal crimp of inserting behind the cable conductor is taken over the extrusion plastic deformation, card is pressed the clamping cables conductor core wire, is threadedly connected in the hollow traction cap again.The main deficiency of this kind cable drawing head is that cable installs drawing head additional and needs to finish in factory, if cable is in case to the field requirement segmentation, again it is just cumbersome to install drawing head additional, need to be equipped with for example hydraulic test of heavy grip clamping clip, make troubles, lack flexibility to construction; Secondly the metal crimp of stube cable is taken over, be by hydraulic tongs metal connecting tube to be flattened to reach with conductor to hold with a firm grip, aluminium hydraulic pressed connecting pipe can not be reused because of not recovering original shape like this, so in case finish cable pulling one time, drawing head is promptly ineffective, can only scrap, cause bigger waste.
The utility model purpose
The utility model purpose is to overcome the deficiency of above-mentioned prior art, provides a kind of not only site installation convenient, need not any hydraulic test, and can reusable cable drawing head.
The utility model purpose realizes, the main improvement is to process a plunger cavity at former hollow traction cap cavity front end, be combined with the bolt propelling piston in this plunger cavity, the assembling metal crimp is taken over to be full of in the cavity of back and is closed with for example hydraulic oil of hydraulic medium, by spiral jacking piston, plunger cavity volume (comprising hydraulic cavities) is diminished, hydraulic medium is taken over pressurization to metal crimp, make it produce rigid deformation and cause, under the self-locking of piston jacking bolt, keep this hydraulic coupling the holding with a firm grip of cable conductor; Traction is finished using and is unclamped piston, and the plunger cavity volume increases, and the hydraulic medium pine is pressed, and the pressurized rigid deformation is recovered, and can reuse thereby make metal crimp take over, and realizes the utility model purpose.Specifically, the utility model cable drawing head comprises the hollow traction cap and is threadedly connected to the interior metal crimp of cavity and takes over, and it is characterized in that hollow traction cap cavity front end has plunger cavity, the bolt propelling piston is arranged in the plunger cavity, be full of in cavity and the plunger cavity and be closed with hydraulic medium.
The said traction cap internal cavity of utility model front end plunger cavity moves transfiguration by piston, reaches there not being the pressurization of compression hydraulic medium, produces distortion thereby metal crimp is taken over, and causes holding with a firm grip to cable conductor.Plunger cavity better adopts use always cylindrical, promptly helps piston seal, also convenient processing.
The bolt propelling piston, it mainly acts on is that piston advances past bolt precession jacking, can make and keep pressurized state automatically locking (not changing cavity volume) after the hydraulic medium pressurization, thereby being guaranteed, metal crimp holds holding with a firm grip to cable conductor, establish the plunger lock device in addition thereby can omit, simplified the drawing head structure; This external spiral jacking piston pressurization, laborsaving, simple to operate.
Said metal crimp is taken over, and its effect is same as the prior art, is used to the cable of holding with a firm grip, and is connected with traction cap.A kind of be preferably to make screw in the cable conductor section of holding with a firm grip in the hollow traction cap and be slim-lined construction, even all lateral areas greatly greater than cross-sectional area, the aluminium hydraulic pressed connecting pipe stress deformation is mainly the ring side face like this, and is not only big to the conductor grip force, and easily recovers rigid deformation; Its cross section better is round hollow cylindrical.In addition,, can also be processed with some alternate annular grooves, can increase the frictional force of conductor and metal crimp adapter, connect withdrawal resistance thereby increase by outside hydraulic pressure at the aluminium hydraulic pressed connecting pipe inner chamber for increasing grip force to conductor.Reuse number of times for improving, a kind of being preferably makes the aluminium hydraulic pressed connecting pipe end surface thickness big, and all lateral thickness are thin, thereby make the aluminium hydraulic pressed connecting pipe compressive deformation be mainly the ring side face, and also helps the rigid deformation recovery.
The utility model cable drawing head, owing in the hollow traction cap, set up plunger cavity and spiral jacking piston, and in metal crimp adapter and traction cap cavity, be full of hydraulic medium, thereby the metal crimp that makes the cable conductor of holding with a firm grip is taken over and is in the hydraulic cavities of servicing fluids piezodielectric, change cavity volume by spiral jacking piston, hydraulic medium is taken over metal crimp inserted the pressurization of cable conductor section, the generation rigid deformation causes holds with a firm grip to cable conductor.This structural cable drawing head, not only can install and use at the scene, need not any hydraulic test, easy to install, greatly facilitate cable laying, and owing to the metal crimp adapter compresses for nonplastic distortion is stressed, traction is finished using, and recovers cavity volume hydraulic pressure and disappears, and rigid deformation can be recovered, thereby can be repeatedly used, saved cable drawing head greatly.
Below in conjunction with a specific embodiment, utility model is further understood in exemplary illustration and help, but the embodiment detail only is for utility model is described, do not represent utility model design whole technical schemes down, therefore should not be construed as the technical scheme qualification total to utility model, some do not depart from the unsubstantiality of utility model design and change In the view of the technical staff, for example simple change of technical characterictic or replacement to have same or similar technique effect, the novel scope of protecting of all true usefulness.
Description of drawings
Accompanying drawing is that utility model is implemented structural representation.
Embodiment
Embodiment: referring to accompanying drawing, the utility model cable drawing head comprises cap shape hollow traction body 8, openend has internal thread, and there is the band internal thread through hole on the top, is connected with traction suspension ring 1 and pressurization bolt 2 inwards from outward, there is cylinder cylinder sleeve chamber 5.1 the through hole inboard, piston 4 and sealing ring 3 in the cylinder sleeve chamber.Hollow T type metal crimp takes over 14, big end has external screw thread and traction body internal thread to be spirally connected, and there is sealing ring 7 to seal, elongate hollow handle (the cable conductor section of holding with a firm grip) endoporus and cable conductor external diameter are roughly approaching, cable conductor 10 inserts in it, the cable conductor section of holding with a firm grip inner peripheral surface has the alternate groove 6 in some roads, and its peripheral wall surfaces thickness is less than top end face thickness.Cap shape hollow traction body 8 is taken over 14 spaces 5 with metal crimp and is constituted hydraulic cavities, is full of and is closed with hydraulic oil.
Inverted top hat shape hollow traction body 8 fills hydraulic oil in cavity, place sealing 7 at the step that is spirally connected, and it is standby that hollow T type metal crimp adapter 14 is bolted in traction body.The assembling drawing head is peelled off cable socket insulation 11 and sheath 12, exposes conductor 10, and cable cover(ing) puts waterproof grommet 9 outward, and cable is inserted traction body, makes conductor insert T type metal crimp and takes over 14 hollow handles.Screw off traction suspension ring 1, precession pressurization bolt 2, propelling piston moves down the plunger cavity volume is diminished, hydraulic oil is taken over pressurization to metal crimp makes it produce rigid deformation, cause the holding with a firm grip of conductor 10, pressurization is finished and is screwed on traction suspension ring 1, with thermal shrinkable sleeve 13 traction seal bodies and cable water-impervious.
Traction is finished using, and screws off traction suspension ring 1, unclamps pressurization bolt 2, and the hydraulic pressure cavity volume recovers original volume, the hydraulic oil release, and metal crimp is taken over because of decompression and is recovered rigid deformation, recovers life size.
To those skilled in the art; under utility model design enlightenment; some distortion that can directly derive or associate from this patent disclosure; or use substituting of known technology in the prior art always, for example hollow traction body alteration of form omits metal crimp and takes over groove; change plunger cavity and metal crimp and take over insertion cable conductor section cross sectional shape or the like; can both realize and basic identical function of the foregoing description and effect, no longer describe in detail for example one by one, all belong to this patent protection range.
Claims (7)
1, cable drawing head comprises the hollow traction cap and the metal crimp that is threadedly connected in the cavity is taken over, and it is characterized in that hollow traction cap cavity front end has plunger cavity, and the bolt propelling piston is arranged in the plunger cavity, is full of in cavity and the plunger cavity and is closed with hydraulic medium.
2,, it is characterized in that traction cap inner plunger chamber is cylindrical according to the described cable drawing head of claim 1.
3,, it is characterized in that the metal crimp adapter screws in the cable conductor section of holding with a firm grip in the hollow traction cap and is slim-lined construction according to the described cable drawing head of claim 1.
4, according to the described cable drawing head of claim 3, the cable conductor section that it is characterized in that holding with a firm grip is hollow cylindrical.
5,, it is characterized in that the same hole of piston jacking bolt and suspension hook according to the described cable drawing head of claim 1.
6,, it is characterized in that the aluminium hydraulic pressed connecting pipe section of holding with a firm grip inner chamber has some alternate annular grooves according to claim 1,2,3,4 or 5 described cable drawing heads.
7, according to the described cable drawing head of claim 6, it is characterized in that the aluminium hydraulic pressed connecting pipe section of holding with a firm grip end surface thickness is big, all lateral thickness are thin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200383988U CN201215878Y (en) | 2008-06-19 | 2008-06-19 | Traction head for electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200383988U CN201215878Y (en) | 2008-06-19 | 2008-06-19 | Traction head for electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201215878Y true CN201215878Y (en) | 2009-04-01 |
Family
ID=40521084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200383988U Expired - Fee Related CN201215878Y (en) | 2008-06-19 | 2008-06-19 | Traction head for electric cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201215878Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908741A (en) * | 2010-07-26 | 2010-12-08 | 杭州电缆有限公司 | Inflatable seal cable laying drawing head made of aluminum alloy |
| CN104300479B (en) * | 2014-09-15 | 2018-08-31 | 中天科技海缆有限公司 | A kind of mounting process of power cable aluminium alloy waterproof drawing head |
| CN110994505A (en) * | 2019-11-29 | 2020-04-10 | 北京中科中电电力工程管理有限公司 | Cable wall-penetrating sheath |
-
2008
- 2008-06-19 CN CNU2008200383988U patent/CN201215878Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908741A (en) * | 2010-07-26 | 2010-12-08 | 杭州电缆有限公司 | Inflatable seal cable laying drawing head made of aluminum alloy |
| CN104300479B (en) * | 2014-09-15 | 2018-08-31 | 中天科技海缆有限公司 | A kind of mounting process of power cable aluminium alloy waterproof drawing head |
| CN110994505A (en) * | 2019-11-29 | 2020-04-10 | 北京中科中电电力工程管理有限公司 | Cable wall-penetrating sheath |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090401 Termination date: 20170619 |