CN112653070A - Waterproof drawing head of composite smooth aluminum-sheathed cable and manufacturing method thereof - Google Patents
Waterproof drawing head of composite smooth aluminum-sheathed cable and manufacturing method thereof Download PDFInfo
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- CN112653070A CN112653070A CN202011525430.7A CN202011525430A CN112653070A CN 112653070 A CN112653070 A CN 112653070A CN 202011525430 A CN202011525430 A CN 202011525430A CN 112653070 A CN112653070 A CN 112653070A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/04—Cable-end sealings
- H02G15/043—Cable-end sealings with end caps, e.g. sleeve closed at one end
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention discloses a composite smooth aluminum sleeve cable waterproof traction head and a manufacturing method thereof, wherein the waterproof traction head comprises a lining gland with a convex ring at the periphery of one side, the head end of a smooth aluminum protective sleeve is provided with an expanding part, the expanding part comprises a conical ring section and a circular ring section connected with the front end of the conical ring section, the convex ring of the lining gland is lined on the inner wall of the circular ring section and welded, the circular ring section is welded with the inner wall of the rear port of an aluminum outer protective sleeve, the rear part of a traction sleeve is in threaded connection with a nut, and a waterproof sealing ring and a flat gasket are arranged between the nut and the lining gland. The invention expands the smooth aluminum protective sleeve at the end of the cable into a horn shape, so that a certain horn-shaped gap is formed between the smooth aluminum protective sleeve and the cable insulation buffer layer, and thus when the smooth aluminum protective sleeve is welded with the aluminum outer protective sleeve, a certain gap is formed between the smooth aluminum protective sleeve and the aluminum outer protective sleeve, and welding materials can permeate, so that the welding seam is firm and reliable.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a cable traction head.
Background
In recent years, the wrinkle aluminum sleeve high-voltage cable in the operation of a power grid system generates an electric corrosion phenomenon for many times, and a cable breakdown accident can be generated in serious cases, so that serious hidden dangers are generated for the safe operation of the power grid. The applicant has developed a new type of composite smooth aluminum jacketed high voltage cable product. In the laying construction of the composite smooth aluminum sheathed cable, how to effectively prevent water from entering the direct-buried or pipe-penetrating laid cable is an important problem to be solved by cable manufacturers.
In the past, although the corrugated aluminum sleeve high-voltage cable adopts the modes of end enclosure or welding and the like, in the actual laying process, the welding seam of the cable traction head is often pulled to be broken or even the cable traction head is pulled off due to the irregular bending of a cable pipeline. When water exists in the pipeline, a large amount of water enters the cable or the conductor, so that the product quality of the cable is seriously affected, and the safety operation of the cable is seriously hidden.
The conventional waterproof traction head is specially designed for conveniently installing and laying the corrugated aluminum sleeve cable, has a simpler structure, can be mastered in the manufacturing process, and can completely meet the requirements of cable laying environments in various occasions.
The design of the waterproof drawing head of the corrugated aluminum sleeve cable mainly adopts the secondary welding seal and the expansion waterproof function of an O-shaped rubber ring, and the installation process technology of the waterproof drawing head is invented. Because the design adopts secondary welding seal, when the cable is subjected to high-strength pulling force, even if the welding seam of the aluminum outer protective pipe and the aluminum corrugated pipe is broken by pultrusion in laying construction, the possibility that water enters the cable from the aluminum corrugated pipe is sealed by a layer of welding seal in the cable. And the sealing mode of the waterproof O-shaped rubber ring is adopted at the cable core, so that even if a large amount of water exists outside the traction sleeve, the water cannot leak from the conductor core, and the waterproof effect is achieved.
However, for the high-voltage cable with the smooth aluminum sleeve structure, due to the fact that the aluminum sleeve is in close contact with the whole surface of the buffer layer of the cable insulation wire core, the phenomena of insufficient soldering, scorching and infirm soldering can occur when the cable end face drawing head is welded. If the traction head manufactured by the process is damaged easily in severe construction conditions or southern areas with high underground water level, especially when the cable penetrates through a large-length jacking pipe, the end of the cable is easy to enter water. Once the cable is flooded, it is very cumbersome to handle.
Disclosure of Invention
The invention aims to solve the technical problem of providing a composite smooth aluminum sheathed cable waterproof traction head and a manufacturing method thereof, and avoiding water from entering the cable end of the smooth aluminum sheathed cable.
In order to solve the technical problems, the invention adopts the following technical scheme: the waterproof drawing head of the composite smooth aluminum sleeve cable comprises a cable conductor core and a smooth aluminum protective sleeve coated outside the cable conductor core, wherein the waterproof drawing head comprises an aluminum drawing head body and an aluminum outer protective sleeve connected with the rear end of the aluminum drawing head body, a drawing sleeve is sleeved outside the head of the cable conductor core, the drawing sleeve extends into the aluminum outer protective sleeve and is connected with the rear end of the aluminum drawing head body, the waterproof drawing head further comprises a lining gland with a convex ring at the periphery of one side, the head end of the smooth aluminum protective sleeve is provided with a diameter expanding part, the diameter expanding part comprises a conical ring section and a circular ring section connected with the front end of the conical ring section, the convex ring of the lining gland is lined on the inner wall of the circular ring section and is welded, the circular ring is welded with the inner wall of the rear port of the aluminum outer protective sleeve, the welding seam width covers the whole circular ring section, and the rear part of the drawing sleeve is in, and a waterproof sealing ring and a flat gasket are arranged between the nut and the lining gland.
Preferably, a heat-shrinkable sleeve is arranged outside a welding point of the circular ring section and the rear port of the aluminum outer protective pipe.
Preferably, the heat-shrinkable sleeve is provided with two layers, and the second layer of heat-shrinkable sleeve is sealed outside the first layer of heat-shrinkable sleeve and is longer than the first layer of heat-shrinkable sleeve.
Preferably, the aluminum traction head body is in a circular truncated cone shape, and the second layer of heat-shrinkable tubing extends to the outer circle side of the circular truncated cone-shaped lower bottom of the aluminum traction head body.
Preferably, the outer circle of the round platform shape lower bottom of the aluminum traction head body is provided with a step part, and the head end of the aluminum outer protective pipe is sleeved on the step part and welded and fixed.
Preferably, the traction sleeve is fixed with the head of the cable conductor core in a crimping mode.
Preferably, the head end of the traction head body is connected with a lifting hook pull ring through threads.
A manufacturing method of a waterproof drawing head of a composite smooth aluminum-sheathed cable comprises the following steps:
1) heating the outer sheath outside the smooth aluminum sheath pipe at the head part of the cable to enable the hot melt adhesive on the surface of the smooth aluminum sheath pipe to be in a molten state, then stripping the outer sheath, and cleaning the hot melt adhesive outside the smooth aluminum sheath pipe;
2) stripping the smooth aluminum sheath pipe and the insulating layer inside the smooth aluminum sheath pipe, and reserving the head of a cable conductor core;
3) a smooth aluminum sleeve expanding device with the similar inner diameter is sleeved in the smooth aluminum protective sleeve, and a certain hammering force is applied inwards to slowly expand the smooth aluminum protective sleeve to form an expanding part;
4) then, sleeving the lining gland into the cable conductor core and pushing to the bottom, and lining the convex ring into the circular ring section of the smooth aluminum protective sleeve;
5) performing first welding seal, and firmly welding and sealing the lining gland and the circular ring section of the smooth aluminum protective sleeve;
6) after the first welding and sealing, waiting for 5-10 minutes for cooling;
7) installing a cable conductor core into a traction sleeve;
8) after sleeving, pressing the middle section of the traction sleeve by using hydraulic pliers;
9) after the compression joint is finished, a waterproof sealing ring and a flat gasket are sequentially arranged, and the waterproof sealing ring is tightly pressed on the lining pressure cover through the gradual screwing of the nut;
10) screwing the welded aluminum outer protective pipe and the aluminum traction head body with the traction sleeve through threads;
11) performing second welding seal to firmly weld the aluminum outer protective pipe and the smooth aluminum protective pipe;
12) after cooling for 5-10 minutes, packaging the first layer of heat-shrinkable tubing;
13) and packaging the second layer of heat-shrinkable sleeve, and screwing the lifting hook pull ring on the aluminum traction head body in the spiral direction.
According to the technical scheme, the smooth aluminum protective sleeve at the end of the cable is expanded into a horn shape through the smooth aluminum sleeve expanding device, a certain horn-shaped gap is formed between the smooth aluminum protective sleeve and the cable insulation buffer layer, so that when the smooth aluminum protective sleeve is welded with the aluminum outer protective sleeve, a certain gap is formed between the smooth aluminum protective sleeve and the aluminum outer protective sleeve, welding materials can penetrate through the gap, and meanwhile, a larger welding area is formed between the circular ring section of the smooth aluminum protective sleeve and the inner wall of the rear end opening of the aluminum outer protective sleeve, so that a firm and reliable welding seam can be guaranteed.
The lining gland is welded with the inner wall of the circular ring section of the smooth aluminum protective sleeve, so that the welded welding seam is firmer, and because the gap between the diameter-expanding part of the smooth aluminum protective sleeve and the cable buffer layer is increased, scorching and insufficient welding cannot be generated, so that the welding penetration is realized, and the welding seam is firmer.
The aluminum outer protective pipe and the smooth aluminum protective sleeve are sealed in a secondary welding mode, the width of a welding seam can cover the circular ring section of the smooth aluminum protective sleeve, meanwhile, the welding current is 10-20% higher than that of the traditional welding current, and the welding width is wider than that of the traditional welding, so that the welding seam is firmer.
By adopting the principle of expansion waterproof function of secondary welding seal and O-shaped rubber ring, after the secondary welding seal is adopted, when the cable is subjected to high-strength tension, even if the welding seam between the aluminum outer protective pipe of the traction head and the smooth aluminum protective sleeve is broken by pultrusion in laying construction, a layer of welding seal is still arranged between the convex ring of the lining gland inside and the smooth aluminum protective sleeve, so that the possibility that water enters the cable from the smooth aluminum protective sleeve is sealed. And the sealing mode of the waterproof O-shaped rubber ring is adopted at the cable core, so that even if a large amount of water exists outside the traction sleeve, the water cannot leak from the conductor core, and the waterproof effect is achieved.
The following detailed description of the present invention will be provided in conjunction with the accompanying drawings.
Drawings
The invention is further described with reference to the accompanying drawings and the detailed description below:
FIG. 1 is a schematic structural view of a waterproof drawing head of a composite smooth aluminum-sheathed cable according to the invention;
FIG. 2 is a schematic illustration of the smooth aluminum sleeve being expanded;
in the figure: 1. shielding in the cable; 2. a cable insulation layer; 3. shielding the cable; 4. smooth aluminum sheathing tubes; 5. an expanding portion; 6. secondary welding points; 7. welding and sealing points for the first time; 8. a lining gland; 9. a waterproof sealing ring; 10. a flat washer; 11. a nut; 12. pulling the casing; 13. a cable conductor core; 14. an aluminum outer protective tube; 15. a traction head welding point; 16. an aluminum tractor body; 17. a lifting hook pull ring, 100, a smooth aluminum sleeve expanding device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the features of the following examples and embodiments may be combined with each other without conflict.
In the process of researching and producing the smooth aluminum-sheathed high-voltage cable, the applicant aims to solve the problems existing in the welding of the waterproof drawing head of the smooth aluminum-sheathed high-voltage cable and find out various defects existing in the welding process, and the diameter-expanding welding process is designed to overcome the problems. In order to achieve the purpose, the technical concept of welding after expanding the diameter of the smooth aluminum sleeve is designed, the smooth aluminum sleeve is ensured to be firmly welded, and even under the worst environmental condition, the cable head of the smooth aluminum sleeve cable is ensured not to enter water after being subjected to field tension construction, so that the quality of the cable construction process is ensured, and the product quality of the cable is ensured.
Example one
As shown in fig. 1, a composite smooth aluminum sheathed cable waterproof drawing head, the cable comprises a cable conductor core 13, and a cable inner shield 1, a cable insulating layer 2, a cable outer shield 3 and a smooth aluminum sheath tube 4 which are coated outside the cable conductor core 13, and the specific structure can refer to the related patents or other prior arts which are applied by the applicant before.
The waterproof drawing head comprises an aluminum drawing head body 16 and an aluminum outer protection pipe 14 connected with the rear end of the aluminum drawing head body 16, a drawing sleeve 12 is sleeved outside the head of the cable conductor core 13, and the drawing sleeve 12 extends into the aluminum outer protection pipe 14 and is connected with the rear end of the aluminum drawing head body 16. The waterproof traction head further comprises a lining gland 8, wherein a convex ring is arranged on the periphery of one side of the lining gland 8, the head end of the smooth aluminum protective sleeve 4 is provided with an expanding portion 5, the expanding portion 5 comprises a conical ring segment and a circular ring segment connected with the front end of the conical ring segment, the convex ring lining of the lining gland 8 is welded on the inner wall of the circular ring segment and serves as a primary welding point 7, the circular ring segment is welded with the inner wall of a rear port of the aluminum outer protective sleeve 14 and serves as a secondary welding point 6, the rear portion of the traction sleeve 12 is in threaded connection with a nut 11, and a waterproof sealing ring 9 and a flat gasket 10 are arranged between the nut 11 and the lining gland 8. Wherein, the waterproof sealing ring 9 adopts an O-shaped rubber ring, and the flat gasket 10 is a conventional flat gasket.
Furthermore, a heat-shrinkable sleeve is arranged outside a welding point of the circular ring section and the rear end opening of the aluminum outer protective pipe. The heat-shrinkable sleeve can firstly realize the water resistance of the cable drawing head outside the drawing head, and can effectively prevent water from entering; and when the heat-shrinkable sleeve is used for drawing the cable through pipe and laying friction, the heat-shrinkable sleeve can also realize effective protection on welding points and has a good waterproof effect.
The aluminum traction head comprises an aluminum traction head body 16, wherein the aluminum traction head body 16 is in a circular truncated cone shape, a step portion is arranged on the outer circle of the lower bottom of the circular truncated cone shape of the aluminum traction head body 16, and the head end of an aluminum outer protecting pipe 14 is sleeved on the step portion and welded and fixed to form a traction head welding point 15. And, the heat-shrinkable bush is equipped with two-layerly, and the one end of first layer heat-shrinkable bush extends to the port outside behind the aluminium outer pillar to cover secondary welding point 6, the other end extends to the excircle of going to the lower bottom of the round platform shape of aluminium traction head body, and covers traction head welding point 15, and equal circumference is evenly sealed. The second layer of heat-shrinkable sleeve is sealed outside the first layer of heat-shrinkable sleeve and is longer than the first layer of heat-shrinkable sleeve in length, and the two ends of the second layer of heat-shrinkable sleeve are correspondingly covered on the end parts of the two ends of the first layer of heat-shrinkable sleeve, and are uniformly sealed in the circumferential direction.
In addition, the traction sleeve 12 is in threaded connection with a threaded hole at the rear end of the aluminum traction head body 16, and the traction sleeve 12 is fixedly connected with the head of the cable conductor core 13 in a compression joint mode. The head end of the traction head body 16 is connected with a lifting hook pull ring 17 through threads.
Example two
As shown in fig. 1 and 2, a method for manufacturing a waterproof drawing head of a composite smooth aluminum-sheathed cable comprises the following steps:
1) according to the sizes of the cable traction heads with different specifications, the outer sheath is heated by a blast burner firstly, so that the hot melt adhesive of the anti-corrosion layer on the surface of the smooth aluminum sheath pipe 4 is in a molten state, the outer sheath is peeled off immediately, and the hot melt adhesive anti-corrosion layer outside the smooth aluminum sheath pipe is wiped clean.
2) The smooth aluminum protective sleeve 4 and the insulating layer inside the smooth aluminum protective sleeve are stripped by tools, a proper cable core length is reserved, the notch of the smooth aluminum protective sleeve 4 is kept as flat as possible, and the saw cut of the smooth aluminum protective sleeve 4 is polished to be flat by coarse abrasive cloth without burrs.
3) The smooth aluminum sheath expanding device 100 with the similar inner diameter is sleeved, a certain hammering force is applied inwards to slowly expand the smooth aluminum sheath pipe 4, and the expanded bell mouth inner diameter is similar to the outer diameter of the aluminum lining gland 8.
4) Then the lining gland 8 is sleeved in the cable conductor core 13 and pushed to the bottom, and the convex ring is lined in the smooth aluminum sheath pipe 4.
5) And then, performing first welding seal, namely, firmly welding the lining gland 8 and the inner opening of the spread smooth aluminum protective sleeve 4, wherein the welding seal method adopts direct welding of an aluminum welding rod.
6) And after the first welding and sealing, waiting for 5-10 minutes for cooling.
7) The cable conductor core 13 is installed into the traction sleeve 12, and the core is installed to the bottom of the traction sleeve.
8) After the sleeve is sleeved, the middle section of the traction sleeve 12 is pressed and connected with two to three ways by hydraulic pliers, so that the pressing and connection are firm and reliable.
9) After the compression joint is finished, the waterproof sealing ring 9 and the flat gasket 10 are sequentially arranged, and the waterproof sealing ring 9 is tightly pressed on the inner gasket gland 8 through gradually screwing in the nut 11.
10) The welded aluminum outer jacket 14 and aluminum tractor body 16 are threaded into the traction sleeve 12 and tightened.
11) Then, the second welding is carried out, and the welding method also adopts the direct welding of an aluminum welding rod, namely the welding of the aluminum outer protective pipe 14 and the smooth aluminum protective pipe 4 is firm;
12) after cooling for 5-10 minutes, packaging a first layer of heat-shrinkable tubing, wherein the first layer of heat-shrinkable tubing is sealed on the secondary welding points, and the periphery is uniformly sealed;
13) and packaging a second layer of heat-shrinkable sleeve, wherein the second layer of heat-shrinkable sleeve is sealed outside the first layer of heat-shrinkable sleeve. At this time, the welding and sealing work of the waterproof drawing head of the smooth aluminum sheathed cable is completed, and then the lifting hook pull ring 17 is screwed up in the spiral direction.
Because the clearance is arranged between the corrugated aluminum sleeve and the cable insulation buffer layer, the aluminum sleeve can permeate when being welded with the traction head, and the firm and reliable welding seam can be ensured. But the structure between level and smooth aluminium cover and the cable insulation buffer layer is inseparable, and is basically seamless, and unable infiltration can appear rosin joint, burnt, the not firm phenomenon of welding when aluminium cover and traction head welding, and also probably scald buffer layer and insulating layer. Therefore, in this embodiment, the smooth aluminum sheath expanding device 100 shown in fig. 2 is adopted to expand the smooth aluminum sheath 4 at the end of the cable into a horn shape, so that a certain horn-shaped gap is formed between the smooth aluminum sheath and the cable insulation buffer layer, so that when the smooth aluminum sheath is welded with the aluminum outer sheath, a certain gap is formed between the smooth aluminum sheath and the aluminum outer sheath, the welding material can penetrate through the gap, and meanwhile, a larger welding area is formed between the circular ring section of the smooth aluminum sheath and the inner wall of the rear port of the aluminum outer sheath, so that the welding seam can be ensured to be firm and reliable.
The lining gland is welded with the inner wall of the circular ring section of the smooth aluminum protective sleeve, so that the welded welding seam is firmer, and because the gap between the diameter-expanding part of the smooth aluminum protective sleeve and the cable buffer layer is increased, scorching and insufficient welding cannot be generated, so that the welding penetration is realized, and the welding seam is firmer.
The aluminum outer protective pipe and the smooth aluminum protective sleeve are sealed in a welding mode, the width of a welding seam can cover the circular ring section of the smooth aluminum protective sleeve, meanwhile, the welding current is 10-20% higher than that of the traditional welding current, the welding width is wider than that of the traditional welding, and the welding seam is firmer.
By adopting the principle of expansion waterproof function of secondary welding seal and O-shaped rubber ring, after the secondary welding seal is adopted, when the cable is subjected to high-strength tension, even if the welding seam between the aluminum outer protective pipe of the traction head and the smooth aluminum protective sleeve is broken by pultrusion in laying construction, a layer of welding seal is still arranged between the convex ring of the lining gland inside and the smooth aluminum protective sleeve, so that the possibility that water enters the cable from the smooth aluminum protective sleeve is sealed. And the sealing mode of the waterproof O-shaped rubber ring is adopted at the cable core, so that even if a large amount of water exists outside the traction sleeve, the water cannot leak from the conductor core, and the waterproof effect is achieved. The labor and material resources in the aspect of after-sale service are greatly saved, the working efficiency of laying construction is improved, and the cable quality is better ensured.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (8)
1. The utility model provides a waterproof drawing head of compound level and smooth aluminium cover cable, the cable includes cable conductor sinle silk and the smooth aluminium protective sleeve of cladding outside cable conductor sinle silk, waterproof drawing head includes aluminium drawing head body, the aluminium outer pillar of being connected with aluminium drawing head body rear end, the head overcoat of cable conductor sinle silk has the traction sleeve pipe, the traction sleeve pipe stretches into in the aluminium outer pillar and is connected its characterized in that with aluminium drawing head body rear end: the waterproof traction head further comprises a lining gland, wherein a convex ring is arranged at the periphery of one side of the lining gland, the head end of the smooth aluminum protective sleeve is provided with an expanding part, the expanding part comprises a conical ring section and a circular ring section connected with the front end of the conical ring section, the convex ring lining of the lining gland is welded on the inner wall of the circular ring section, the circular ring section is welded with the inner wall of a rear port of the aluminum outer protective sleeve, the welding seam width covers the whole circular ring section, the rear part of the traction sleeve is in threaded connection with a nut, and a waterproof sealing ring and a flat gasket are arranged between the nut and the lining gland.
2. The waterproof drawing head of compound smooth aluminum sheathed cable of claim 1, characterized in that: and a heat-shrinkable sleeve is arranged outside the welding point of the circular ring section and the rear end opening of the aluminum outer protective pipe.
3. The waterproof drawing head of compound smooth aluminum sheathed cable according to claim 2, characterized in that: the heat-shrinkable sleeve is provided with two layers, and the second layer of heat-shrinkable sleeve is sealed outside the first layer of heat-shrinkable sleeve and is longer than the first layer of heat-shrinkable sleeve.
4. The waterproof drawing head of compound smooth aluminum sheathed cable according to claim 3, characterized in that: the aluminum traction head body is in a circular truncated cone shape, and the second layer of heat-shrinkable tubing extends to the outer circle side of the circular truncated cone lower bottom of the aluminum traction head body.
5. The waterproof drawing head of the composite smooth aluminum-sheathed cable according to claim 4, characterized in that: the outer circle of going to the bottom of the round platform shape of aluminium traction head body is equipped with the step portion, the head end overcoat of aluminium outer pillar is in step portion and welded fastening.
6. The waterproof drawing head of compound smooth aluminum sheathed cable of claim 1, characterized in that: and the traction sleeve is fixedly connected with the head of the cable conductor core in a compression joint manner.
7. The waterproof drawing head of compound smooth aluminum sheathed cable of claim 1, characterized in that: the head end of the traction head body is connected with a lifting hook pull ring through threads.
8. A method for manufacturing a waterproof drawing head of a composite smooth aluminum sheathed cable, which is used for manufacturing the waterproof drawing head of the composite smooth aluminum sheathed cable of any one of claims 1 to 7, and is characterized by comprising the following steps:
1) heating the outer sheath outside the smooth aluminum sheath pipe at the head part of the cable to enable the hot melt adhesive on the surface of the smooth aluminum sheath pipe to be in a molten state, then stripping the outer sheath, and cleaning the hot melt adhesive outside the smooth aluminum sheath pipe;
2) stripping the smooth aluminum sheath pipe and the insulating layer inside the smooth aluminum sheath pipe, and reserving the head of a cable conductor core;
3) a smooth aluminum sleeve expanding device with the similar inner diameter is sleeved in the smooth aluminum protective sleeve, and a certain hammering force is applied inwards to slowly expand the smooth aluminum protective sleeve to form an expanding part;
4) then, sleeving the lining gland into the cable conductor core and pushing to the bottom, and lining the convex ring into the circular ring section of the smooth aluminum protective sleeve;
5) performing first welding seal, and firmly welding and sealing the lining gland and the circular ring section of the smooth aluminum protective sleeve;
6) after the first welding and sealing, waiting for 5-10 minutes for cooling;
7) installing a cable conductor core into a traction sleeve;
8) after sleeving, pressing the middle section of the traction sleeve by using hydraulic pliers;
9) after the compression joint is finished, a waterproof sealing ring and a flat gasket are sequentially arranged, and the waterproof sealing ring is tightly pressed on the lining pressure cover through the gradual screwing of the nut;
10) screwing the welded aluminum outer protective pipe and the aluminum traction head body with the traction sleeve through threads;
11) performing second welding seal to firmly weld the aluminum outer protective pipe and the smooth aluminum protective pipe;
12) after cooling for 5-10 minutes, packaging the first layer of heat-shrinkable tubing;
13) and packaging the second layer of heat-shrinkable sleeve, and screwing the lifting hook pull ring on the aluminum traction head body in the spiral direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210091671.8A CN114825196B (en) | 2020-12-22 | 2020-12-22 | Manufacturing method of waterproof traction head of composite smooth aluminum sleeve cable |
| CN202011525430.7A CN112653070B (en) | 2020-12-22 | 2020-12-22 | Waterproof drawing head of compound level and smooth aluminium sheathing cable |
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| CN202011525430.7A CN112653070B (en) | 2020-12-22 | 2020-12-22 | Waterproof drawing head of compound level and smooth aluminium sheathing cable |
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| CN202011525430.7A Active CN112653070B (en) | 2020-12-22 | 2020-12-22 | Waterproof drawing head of compound level and smooth aluminium sheathing cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI823738B (en) * | 2022-08-30 | 2023-11-21 | 金泓植 | Wire conduit traction device |
| CN117638735A (en) * | 2024-01-22 | 2024-03-01 | 云南多宝电缆集团股份有限公司 | Power cable traction head and use method thereof |
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| CN117638735A (en) * | 2024-01-22 | 2024-03-01 | 云南多宝电缆集团股份有限公司 | Power cable traction head and use method thereof |
| CN117638735B (en) * | 2024-01-22 | 2024-04-02 | 云南多宝电缆集团股份有限公司 | Power cable traction head and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114825196B (en) | 2023-05-26 |
| CN112653070B (en) | 2022-03-15 |
| CN114825196A (en) | 2022-07-29 |
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