CN112927851A

CN112927851A - Copper-clad aluminum conductor crosslinked polyethylene insulated power cable

Info

Publication number: CN112927851A
Application number: CN202110095898.5A
Authority: CN
Inventors: 郭智昊
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-06-08
Anticipated expiration: 2041-01-25
Also published as: CN112927851B

Abstract

The invention relates to the technical field of cables, and discloses a copper-clad aluminum conductor crosslinked polyethylene insulated power cable which comprises a cable body, the cable joints are arranged at the two ends of the cable body and comprise an inner shell and an outer shell, the inner shell is arranged in the outer shell, a space is arranged between the inner shell and the outer shell to form a drying chamber, the drying chamber is filled with drying particles, two opposite side surfaces of the outer shell are provided with first connecting ports, two opposite side surfaces of the inner shell are respectively provided with a second connecting port, the first connecting port and the second connecting port are corresponding in position, the connecting sleeve is arranged between the first connecting port and the second connecting port, and the connecting sleeve is connected with the through hole communicated with the drying chamber.

Description

Copper-clad aluminum conductor crosslinked polyethylene insulated power cable

Technical Field

The invention relates to the technical field of cables, in particular to a copper-clad aluminum conductor crosslinked polyethylene insulated power cable.

Background

Cables are generally rope-like cables made by stranding several or groups of conductors (at least two in each group), each group being insulated from each other and often twisted around a center, the entire outer surface being coated with a highly insulating coating. The cable has the characteristics of internal electrification and external insulation. The cable includes power cable, control cable, compensation cable, shielding cable, high-temperature cable, computer cable, signal cable, coaxial cable, fire-resistant cable, marine cable, mining cable, aluminum alloy cable and the like. They are composed of single or multi-strand wires and insulating layers, and are used for connecting circuits, electric appliances and the like.

At present, a flame-retardant layer is generally arranged on a sheath of a cable of the flame-retardant cable, the flame-retardant layer is generally arranged into filled flame-retardant particles, inorganic flame-retardant particles have the characteristics of no halogen and high-grade flame retardance, but the inorganic flame-retardant particles have stronger water absorption performance, particularly at the end part of the cable, the moisture absorption effect is more obvious, the normal use of the cable is greatly influenced after the flame-retardant layer absorbs water, and safety accidents are seriously caused.

Disclosure of Invention

Therefore, the copper clad aluminum conductor crosslinked polyethylene insulated power cable needs to be provided, and the problem that the existing cable is easy to absorb moisture at a cable joint is solved.

In order to achieve the purpose, the invention provides a copper-clad aluminum conductor crosslinked polyethylene insulated power cable which comprises a cable body, wherein cable joints are arranged at two ends of the cable body;

the cable body comprises a cable core and an outer protective sleeve, the outer protective sleeve is provided with a first insulating layer, a metal armor layer, a second insulating layer, a flame-retardant layer, a third insulating layer, a buffer layer and an outer protective layer from inside to outside, the first insulating layer, the second insulating layer and the third insulating layer are all made of cross-linked polyethylene materials, flame-retardant particles are filled in the flame-retardant layer, and the cable core comprises a copper-clad aluminum conductor and an inner insulating layer extruded on the outer side surface of the copper-clad aluminum conductor;

the cable joint includes interior casing and shell body, interior casing sets up in the shell body, the space has between interior casing and the shell body, forms dry cavity, dry cavity intussuseption is filled with dry granule, the relative both sides face of shell body all is equipped with first connector, the relative both sides face of interior casing all is equipped with the second connector, first connector and second connector position are corresponding, the adapter sleeve has between first connector and the second connector, be connected with the through-hole of the dry cavity of intercommunication on the adapter sleeve.

Furthermore, the opening area of the second connector is smaller than that of the first connector, the first connector accommodates the cable body to pass through, the second connector accommodates the cable core to pass through, and the outer protective sleeve is connected with the periphery of the second connector in a blocking manner.

Further, the filling rate of the dry particles in the drying chamber is 50% -85%, an inflation inlet is formed in the outer shell, an air bag is arranged in the drying chamber, and the air bag is communicated with the inflation inlet. The air bag is arranged so that the inner shell and the outer shell have a certain buffer space.

Further, the connecting sleeve is made of a flexible sleeve. When the cable body inserts cable joint, the gasbag is flushed gas, and the gasbag can sticis the surface of outer protective layer with dry granule, avoids inside outside moisture enters into cable joint to can play the effect of fixed cable body.

Furthermore, the lateral surface circumference of adapter sleeve is equipped with a plurality of elastic ribs, the both ends of elastic rib are connected with interior casing and shell body respectively. The elastic ribs enable the connecting sleeve to be restored to the state of extruding the cable body when the air bag is not inflated, and the cable body is convenient to disassemble.

Further, be equipped with the division board in the drying chamber, the medial surface of shell body and the lateral surface of interior casing are connected to the division board, the division board falls into a plurality of subchambers with the drying chamber, the quantity of gasbag is a plurality of, gasbag and subchamber one-to-one. The partition plate is used for separating the drying chamber, so that the drying particles are prevented from being excessively concentrated in a local area due to the squeezing action of the air bag.

Further, the quantity of division board is four, and four division boards encircle interior casing circumference and set up.

Further, the inside connecting channel that is of interior casing, be equipped with the linkage unit in the connecting channel, the linkage unit includes two elasticity preforming and conducting strip, and two elasticity preforming set up relatively, and two elasticity preforming are corresponding with two second connector positions on the interior casing respectively, two elasticity preforming of conducting strip electric connection, the one end and the connecting channel fixed connection of elasticity preforming, the other end of elasticity preforming are the free end, are equipped with the bellied arc wall that makes progress on the elasticity preforming, the arc wall is used for pressing the copper clad aluminum conductor of cable body. The mutual connection of the cable bodies is facilitated.

Further, the dry particles are silica gel particles. The silica gel particles can be recycled.

Further, the first interface department of shell body still is provided with the damping unit, the damping unit includes damping inner tube and damping urceolus, damping urceolus and shell body fixed connection, the damping inner tube sets up in the damping urceolus, have the space between damping inner tube and the damping urceolus, form the damping chamber, be equipped with damping spring in the damping chamber, damping spring connects damping inner tube and damping urceolus.

The damping unit can play the damping effect to the cable body effectively, prevents that the cable body vibrations and the electric connection of cable body in cable joint department.

Furthermore, an expansion joint is formed in the side wall of the vibration damping inner cylinder, one end, far away from the connecting port, of the expansion joint extends along the axis of the vibration damping inner cylinder, and an interval is formed between the expansion joint and one end, close to the outer shell, of the vibration damping inner cylinder.

The technical scheme has the following beneficial effects:

1. according to the invention, the flame-retardant particles in the flame-retardant layer have a good flame-retardant effect, and general flame-retardant particles have a certain moisture absorption characteristic, especially the end part of the cable body.

2. According to the cable, the buffer layer of the cable body is beneficial to improving the anti-vibration effect of the cable, the cable core of the cable body enters the inner shell through the second connector to be electrically connected, when the cable body is vibrated due to certain impact, the outer protective sleeve of the cable body is vibrated, the buffer layer weakens the vibration of the cable core, and the outer protective sleeve layer is not directly connected with the inner shell, so that when the outer protective sleeve layer vibrates, the inner shell is not influenced, and the connection of the cable core to the inner shell is prevented from being influenced.

Drawings

Fig. 1 is a cross-sectional view of a cable body according to an embodiment.

Fig. 2 is a cross-sectional view of a cable connector according to an embodiment.

Fig. 3 is a partial sectional view taken along line a-a of fig. 2.

Fig. 4 is a structural view of a vibration damping inner cylinder according to an embodiment.

Description of reference numerals:

1. a cable core; 11. copper clad aluminum conductors; 12. an inner insulating layer;

2. an outer protective sheath; 21. a first insulating layer; 22. a metal armor layer; 23. a second insulating layer; 24. a flame retardant layer; 25. a third insulating layer; 26. a buffer layer; 27. an outer protective layer;

3. a cable joint; 31. an outer housing; 311. a first connection port; 32. an inner housing; 321. a second connection port; 33. drying the granules; 34. an air bag; 35. an inflation inlet; 36. connecting sleeves; 37. an elastic rib; 38. a partition plate;

4. a connection unit; 41. elastic tabletting; 42. a conductive sheet;

5. a vibration reduction unit; 51. a vibration reduction outer cylinder; 52. a vibration reduction inner cylinder; 521. expanding the seam; 53. a damping spring.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1-4, the present embodiment provides a copper clad aluminum conductor crosslinked polyethylene insulated power cable, which includes a cable body, wherein two ends of the cable body are provided with cable connectors 3;

the cable body comprises a cable core 1 and an outer protective sleeve 2, the outer protective sleeve 2 is provided with a first insulating layer 21, a metal armor layer 22, a second insulating layer 23, a flame retardant layer 24, a third insulating layer 25, a buffer layer 26 and an outer protective layer 27 from inside to outside, the first insulating layer 21, the second insulating layer 23 and the third insulating layer 25 are all made of cross-linked polyethylene materials, the flame retardant layer 24 is filled with flame retardant particles, and the cable core 1 comprises a copper-clad aluminum conductor 11 and an inner insulating layer 12 extruded on the outer side surface of the copper-clad aluminum conductor 11;

cable joint 3 includes interior casing 32 and shell body 31, interior casing 32 sets up in shell body 31, interior casing 32 and shell body 31 between have the space, form dry chamber, dry chamber intussuseption is filled with dry granule 33, the relative both sides face of shell body 31 all is equipped with first connector 311, the relative both sides face of interior casing 32 all is equipped with second connector 321, first connector 311 and second connector 321 position are corresponding, adapter sleeve 36 has between first connector 311 and the second connector 321, be connected with the through-hole of the dry chamber of intercommunication on the adapter sleeve 36.

In this embodiment, the flame retardant particles are inorganic metal oxides such as aluminum hydroxide and magnesium hydroxide, and the buffer layer 26 is an elastic material such as a damping buffer material, for example, sponge and rubber.

The opening area of the second connector 321 is smaller than that of the first connector 311, the first connector 311 receives the cable body to pass through, the second connector 321 receives the cable core 1 to pass through, and the outer protective sleeve 2 is connected with the periphery of the second connector 321 in a blocking manner.

The filling rate of the dry particles 33 in the drying chamber is 50% -85%, the outer shell 31 is provided with an inflation inlet 35, an air bag 34 is arranged in the drying chamber, and the air bag 34 is communicated with the inflation inlet 35. The air bag 34 is provided so that the inner case 32 and the outer case 31 have a certain buffer space.

In this embodiment, the dry particles 33 are silica gel particles. The silica gel particles can be recycled.

To facilitate the mounting of the various components, both the inner housing 32 and the outer housing 31 may be designed as two parts that are detachably connected.

In this embodiment, be equipped with four division boards 38 in the drying chamber, four division boards 38 encircle interior casing 32 circumference and set up, the medial surface of shell body 31 and the lateral surface of interior casing 32 are connected to division board 38, division board 38 falls into a plurality of subchambers with the drying chamber, the quantity of gasbag 34 is four, gasbag 34 and subchamber one-to-one. The partition 38 serves to partition the drying chamber and avoid over-concentration of the dried pellets 33 in localized areas due to the squeezing action of the bladder 34.

The connecting sleeve 36 is made of a flexible sleeve, and a plurality of elastic ribs 37 are arranged on the outer side surface of the connecting sleeve 36 in the circumferential direction. When the cable body is connected into the cable connector 3, the air bag 34 is flushed with air, the air bag 34 can press the dry particles 33 against the outer surface of the outer protection layer 27, external moisture is prevented from entering the cable connector 3, and the cable body can be fixed. The two ends of the elastic ribs 37 are connected to the inner shell 32 and the outer shell 31, respectively. The elastic ribs 37 enable the connecting sleeve 36 to be restored to the state of extruding the cable body when the air bag 34 is not inflated, thereby facilitating the disassembly of the cable body.

The inside connecting channel that is of interior casing 32, in this embodiment, the connecting channel is the square, be equipped with linkage unit 4 in the connecting channel, linkage unit 4 includes two elasticity preforming 41 and conducting strip 42, and two elasticity preforming 41 set up relatively, and two elasticity preforming 41 are corresponding with two second connector 321 positions on the interior casing 32 respectively, two elasticity preforming 41 of conducting strip 42 electric connection, the one end and the connecting channel fixed connection of elasticity preforming 41, the other end of elasticity preforming 41 are the free end, are equipped with the bellied arc wall that makes progress on the elasticity preforming 41, the arc wall is used for pressing the copper clad aluminum conductor 11 of cable body. The mutual connection of the cable bodies is facilitated.

The first interface 311 department of shell body 31 still is provided with damping unit 5, damping unit includes damping inner tube 52 and damping urceolus 51, damping urceolus 51 and shell body 31 fixed connection, damping inner tube 52 sets up in damping urceolus 51, have the space between damping inner tube 52 and the damping urceolus 51, form the damping chamber, be equipped with damping spring 53 in the damping chamber, damping inner tube 52 and damping urceolus 51 are connected to damping spring 53. The damping unit 5 can effectively damp the cable body, and prevent the cable body from vibrating and the cable body from being electrically connected at the cable joint 3.

An expansion gap 521 is formed in the side wall of the vibration damping inner cylinder 52, one end, far away from the connecting port, of the expansion gap 521 extends along the axis of the vibration damping inner cylinder 52, and a distance is formed between the expansion gap 521 and one end, close to the outer shell 31, of the vibration damping inner cylinder 52.

When the invention is used:

the flame-retardant particles in the flame-retardant layer 24 have a good flame-retardant effect, and the buffer layer 26 can reduce the influence of external impact on the cable core 1.

When the cable bodies are electrically connected through the cable joint 3, the cable bodies pass through the vibration reduction unit 5 and enter the connecting sleeve 36, the cable core 1 is provided with a connecting end protruding out of the outer protective sleeve 2, the connecting end extends into the inner shell 32 and jacks up the arc-shaped groove of the elastic pressing sheet 41, at the moment, the elastic pressing sheet 41 presses the cable core 1 tightly, the cable properties of the two cable bodies are electrically connected through the conducting sheet 42 between the elastic pressing sheets 41, then the air bag 34 is inflated through the inflation inlet 35, so that the connecting sleeve 36 is pressed downwards by the dry particles 33, the connecting sleeve 36 presses the outer protective layer 27 of the cable body tightly, when moisture outside the environment enters the cable joint, the connecting sleeve 36 is encountered and can be absorbed by the dry particles 33 on the connecting sleeve 36, the end part of the cable body is placed to absorb or the moisture enters the inner shell 32, and the electrical connection of the cable, causing a safety accident.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.

Although the embodiments have been described, once the basic inventive concept is obtained, other variations and modifications of these embodiments can be made by those skilled in the art, so that the above embodiments are only examples of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes using the contents of the present specification and drawings, or any other related technical fields, which are directly or indirectly applied thereto, are included in the scope of the present invention.

Claims

1. A copper-clad aluminum conductor crosslinked polyethylene insulated power cable is characterized by comprising a cable body, wherein cable joints are arranged at two ends of the cable body;

2. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 1, wherein the opening area of the second connector is smaller than the opening area of the first connector, the first connector accommodates the cable body to pass through, the second connector accommodates the cable core to pass through, and the outer protective sleeve is abutted with the periphery of the second connector.

3. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 1, wherein the filling rate of the dry particles in the drying chamber is 50-85%, the outer shell is provided with an inflation inlet, the drying chamber is internally provided with an air bag, and the air bag is communicated with the inflation inlet.

4. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 3, characterized in that the material of the connecting sleeve is a flexible sleeve.

5. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 4, wherein a plurality of elastic ribs are circumferentially arranged on the outer side surface of the connecting sleeve, and two ends of the elastic ribs are respectively connected with the inner shell and the outer shell.

6. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 5, wherein a partition plate is arranged in the drying chamber, the partition plate is connected with the inner side surface of the outer shell and the outer side surface of the inner shell, the partition plate divides the drying chamber into a plurality of sub-chambers, the number of the air bags is multiple, and the air bags correspond to the sub-chambers one by one.

7. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 6, wherein the number of the partition plates is four, and four partition plates are circumferentially arranged around the inner housing.

8. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 1, wherein the inner housing is internally provided with a connecting channel, the connecting channel is internally provided with a connecting unit, the connecting unit comprises two elastic pressing pieces and two conducting strips, the two elastic pressing pieces are oppositely arranged and respectively correspond to two second connecting ports on the inner housing, the conducting strips are electrically connected with the two elastic pressing pieces, one end of each elastic pressing piece is fixedly connected with the connecting channel, the other end of each elastic pressing piece is a free end, an arc-shaped groove protruding upwards is arranged on each elastic pressing piece, and the arc-shaped groove is used for pressing the copper-clad aluminum conductor of the cable body.

9. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to claim 1, wherein the dry particles are silica gel particles.

10. The copper-clad aluminum conductor crosslinked polyethylene insulated power cable according to any one of claims 1 to 9, wherein a damping unit is further disposed at the first connection port of the outer housing, the damping unit comprises a damping inner cylinder and a damping outer cylinder, the damping outer cylinder is fixedly connected with the outer housing, the damping inner cylinder is disposed in the damping outer cylinder, a space is provided between the damping inner cylinder and the damping outer cylinder to form a damping cavity, a damping spring is disposed in the damping cavity, and the damping spring connects the damping inner cylinder and the damping outer cylinder.