CN202217994U - Flame retardant type cold shrinkable intermediate joint used in coal mine - Google Patents
Flame retardant type cold shrinkable intermediate joint used in coal mine Download PDFInfo
- Publication number
- CN202217994U CN202217994U CN2011203388241U CN201120338824U CN202217994U CN 202217994 U CN202217994 U CN 202217994U CN 2011203388241 U CN2011203388241 U CN 2011203388241U CN 201120338824 U CN201120338824 U CN 201120338824U CN 202217994 U CN202217994 U CN 202217994U
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- CN
- China
- Prior art keywords
- flame retardant
- transition joint
- retardant type
- intermediate joint
- cold shrinkable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a flame retardant type cold shrinkable intermediate joint which can be used in a coal mine. The flame retardant type cold shrinkable intermediate joint belongs to the cable wire technology field and is used to improve the reliability of the power cable connection. The technical scheme is that: the flame retardant type cold shrinkable intermediate joint includes a cold shrinkable intermediate joint body which can joint two power cables; after the improvement, the outside of the cold shrinkable intermediate joint body is coated with a PVC flame retardant belt, and the two ends of the PVC flame retardant belt overlap an outer sheath of the power cables. The outside of the flame retardant type cold shrinkable intermediate joint is provided with the PVC flame retardant belt, so the flame retardant effect is obviously improved, and the working reliability of the cold shrinkable intermediate joint is greatly improved.
Description
Technical field
The utility model relates to a kind of cable termination annex, is specially a kind of shrinkage transition joint, belongs to the cable technology field.
Background technology
Electric power transfer requires coefficient of safety than higher under the existing coal mine; When laying electrical network, need be connected with two or the butt joint of many power cables or with power consumption equipment, yet according to the characteristic of the construction of cable; Need recover each structure sheaf of cable, to guarantee the basic electric property ability of cable.In the prior art, using more is common prefabrication type, common shrinkage terminals and shrinkage transition joint.Common prefabricated terminals accessories of a product split is provided with; The annex specification is more, and each annex need be corresponding one by one with the cable socket cross section during use, and cable is crooked or move and occur easily throwing off between the cable interior layer; And material and technology all do not have fire resistance, have certain potential safety hazard.In case protection explosion accident or firing accident are easy to cause security incident under the generation coal mine.
In addition, common shrinkage transition joint is a cannula-like, and the support lead-in is inserted in sulfuration injection moulding after hole enlargement in mould; In the work progress; Consistent for the stable and mechanical strength that guarantees cable connection point two ends electric field needs accurately to locate shrinkage transition joint centre position, makes cable connection point at joint body point midway; During practical operation; Mostly the silicon rubber that uses because of transition joint is opaque shape, only can rely on estimation perhaps through the externally thick side of gage transition joint to be located, and accuracy is relatively poor.
The utility model content
The utility model be used to overcome original technology defective, provide that a kind of fire resistance is good, easy for installation, the colliery of accurate positioning is with flame retardant type shrinkage transition joint.
The alleged problem of the utility model realizes with following technical scheme:
A kind of colliery is with flame retardant type shrinkage transition joint; Comprise a shrinkage transition joint body that two power cables are docking together in the formation; The external packets of said shrinkage transition joint body is covered with the PVC inhibiting tape, and the two ends overlap joint of said PVC inhibiting tape is on the oversheath of power cable.
Above-mentioned colliery is with flame retardant type shrinkage transition joint; Said shrinkage transition joint body is provided with integrated body in constituting, and said body ecto-entad is followed successively by out semiconductor layer, main insulating layer and inner semiconductor layer, and inner semiconductor layer is inlaid in the main insulating layer centre position; Said main insulating layer two ends are provided with stress cone; Stress cone is horn-like conductive rubber spare, in the body centre position centering ring is set, and centering ring is corresponding with interior semi-conductive layer mid point.
Above-mentioned colliery is with flame retardant type shrinkage transition joint, and said body is sleeved on and supports on the bushing pipe, and said support bushing pipe overall diameter is not less than internal diameter of tube body.
Above-mentioned colliery is with flame retardant type shrinkage transition joint, and said support bushing pipe forms by supporting lead-in curl winding overlap joint, and said support lead-in is the structure that has tongue and groove.
The utlity model has following advantage:
The utility model outer setting has the PVC inhibiting tape, flame retardant effect be improved significantly, improved the reliability of shrinkage transition joint work greatly.
When the shrinkage transition joint body of the utility model is installed according to transition joint; Centralized positioning is inaccurate, causes cable joint two ends electric field branch inhomogeneous, causes the phenomenon of electric shock or insulation breakdown easily; Centering ring is set outside transition joint; Thereby the realization installation process is accurately located, and simple to operate, quick for installation, laborsaving.
The shrinkage transition joint body of the utility model adopts elasticity and insulating properties silicon rubber shrinkage preferably material, and the shrinkage transition joint becomes certain tension force to closely cooperate with cable, prevents that insulating barrier from receiving the intrusion of external force damage and moisture.
The shrinkage transition joint body of the utility model adopts integral prefabricated formula Compact Design, and transition joint main body do as one likes can be processed by good liquid silicon rubber material, in use can not form the insulation dead angle because of the bending of cable.The insulating properties of material itself, anti-electric trace property and resistance to acids and bases are good, and elasticity is better, solve the cable excessive difficult problem of expanding with heat and contract with cold, and have sizable serviceability temperature scope, and weather resisteant can be good.During the cable preliminary treatment, it is short to open the stripping distance, and the installing space size is less, quick construction, reliable.
Description of drawings
Fig. 1 is a shrinkage transition joint body scheme of installation;
Fig. 2 is the state after the installation of the utility model.
Each parts label is respectively in the accompanying drawing: 1. out semiconductor layer; 2. main insulating layer; 3. inner semiconductor layer; 4. stress cone; 5. centering ring; 6. support bushing pipe; 7. support lead-in; 8. cable; 9. joint sleeve; 10. core; 11, PVC inhibiting tape.
Embodiment
Referring to Fig. 2, shrinkage transition joint body exterior is coated with PVC inhibiting tape 11, treat the installation of shrinkage transition joint main body after, outside twine two-layer PVC inhibiting tape 11 at it, make its two ends each 100mm of spliced cables oversheath.
Referring to Fig. 1; During constituting, shrinkage transition joint body is provided with out semiconductor layer 1, main insulating layer 2 and the inner semiconductor layer 3 of integral injection molding; Said inner semiconductor layer is inlaid in the middle part of the inboard main insulating layer of body; After the cable socket core butt joint to be connected, tightened together by metal joint sleeve 9, the core joint is positioned at the joint sleeve center.Corresponding inner semiconductor layer centre position, said transition joint body outer ring is provided with centering ring 5, and centering ring is along the axially outstanding annular ring of out semiconductor layer.Be sleeved on after the body expansion with the shrinkage medial head in the production process and support on the bushing pipe 6, wherein, support the bushing pipe external diameter greater than internal diameter of tube body.
The support bushing pipe that adopts in the present embodiment is the plastic support lead-in 7 that spiral links together; Wherein, supporting lead-in is whole one, said support lead-in thick middle; Two ends are thin; Interference pressing between the adjacent spiral coil is bonded together through the laser heater heating between the superimposed featheredge, forms the helical form bushing pipe.The terminal of supporting lead-in turns back to top through supporting the bushing pipe inboard, during installation, near cable 8 terminations, datum mark is set; Transition joint is socketed in the cable core junction of handling well (datum mark is identical to distance between reference with cable connection point distance and centering ring); After the accurate positioning, affect the support lead-in that supports bushing pipe top, helix tube is promptly drawn back along the helix impression; Transition joint will rely on the elastical retraction of self, thereby closely is attached on the cable.The utility model is installed simple, need not to employ naked light or specific purpose tool, is convenient to operation.
Claims (4)
1. a colliery is with flame retardant type shrinkage transition joint; Comprise a shrinkage transition joint body that two power cables (8) are docking together in the formation; It is characterized in that; The external packets of said shrinkage transition joint body is covered with PVC inhibiting tape (11), and the two ends overlap joint of said PVC inhibiting tape (11) is on the oversheath of power cable (8).
2. colliery according to claim 1 is with flame retardant type shrinkage transition joint; It is characterized in that; Said shrinkage transition joint body is provided with integrated body in constituting, and said body ecto-entad is followed successively by out semiconductor layer (1), main insulating layer (2) and inner semiconductor layer (3), and inner semiconductor layer is inlaid in the main insulating layer centre position; Said main insulating layer two ends are provided with stress cone (4); Stress cone is horn-like conductive rubber spare, and said body centre position is provided with centering ring (5), and centering ring is corresponding with interior semi-conductive layer mid point.
3. colliery according to claim 2 is characterized in that with flame retardant type shrinkage transition joint said body is sleeved on and supports on the bushing pipe (6), and said support bushing pipe overall diameter is not less than internal diameter of tube body.
4. colliery according to claim 3 is characterized in that with flame retardant type shrinkage transition joint said support bushing pipe forms by supporting lead-in (7) curl winding overlap joint, and said support lead-in is the structure that has tongue and groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203388241U CN202217994U (en) | 2011-09-09 | 2011-09-09 | Flame retardant type cold shrinkable intermediate joint used in coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203388241U CN202217994U (en) | 2011-09-09 | 2011-09-09 | Flame retardant type cold shrinkable intermediate joint used in coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202217994U true CN202217994U (en) | 2012-05-09 |
Family
ID=46017225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203388241U Expired - Lifetime CN202217994U (en) | 2011-09-09 | 2011-09-09 | Flame retardant type cold shrinkable intermediate joint used in coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202217994U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337813A (en) * | 2013-05-30 | 2013-10-02 | 国家电网公司 | Low-voltage cable intermediate joint cold contraction technology |
| CN105977899A (en) * | 2016-05-11 | 2016-09-28 | 姜涛 | Fireproof explosion-proof device for intermediate joint of power cables |
| CN106025995A (en) * | 2016-07-25 | 2016-10-12 | 常州市拓源电缆成套有限公司 | Fireproof outdoor cable terminal for railways |
-
2011
- 2011-09-09 CN CN2011203388241U patent/CN202217994U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337813A (en) * | 2013-05-30 | 2013-10-02 | 国家电网公司 | Low-voltage cable intermediate joint cold contraction technology |
| CN103337813B (en) * | 2013-05-30 | 2016-03-30 | 国家电网公司 | Low-voltage cable intermediate joint cold contraction technology |
| CN105977899A (en) * | 2016-05-11 | 2016-09-28 | 姜涛 | Fireproof explosion-proof device for intermediate joint of power cables |
| CN105977899B (en) * | 2016-05-11 | 2018-12-28 | 姜涛 | Intermediate joint of electric cable fireproof anti-explosion device |
| CN106025995A (en) * | 2016-07-25 | 2016-10-12 | 常州市拓源电缆成套有限公司 | Fireproof outdoor cable terminal for railways |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |
|
| CX01 | Expiry of patent term |