A crosslinked polyethylene insulated power cable

Abstract

The application relates to a kind of crosslinked polyethylene insulated power cables, including multiple bundles of winding together core, the core includes wire and the insulating shield layer wrapped outside the wire, the core is provided with inner sheath, waterproof filling layer is arranged between the inner sheath and the core, the outer periphery of the inner sheath is wrapped with steel belt armoring layer, the outer periphery of the steel belt armoring layer is wrapped with outer sheath, the top of the outer sheath is provided with installation plane, the fixed keel can be detachably installed on the installation plane, the outer periphery of the outer sheath is provided with a plurality of toroidal support keels, the support keel and the fixed keel are detachably connected together.The application has the advantages of improving the stability of cable use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cable design, and particularly to a cross-linked polyethylene insulated power cable. BACKGROUND

[0002] Cross-linked polyethylene insulated power cable (XLPE Insulated Power Cable) is a kind of high-performance cable widely used in power transmission and distribution. Its insulation layer uses cross-linked polyethylene (XLPE) material, which has excellent electrical performance, heat resistance and mechanical strength, and is suitable for medium and high voltage power transmission system. At present, during the arrangement of the cross-linked polyethylene insulated power cable, when the cable is buried underground, the soil above the cable will generate downward pressure on the cable. After the cable withstands the pressure from the soil above for a long time, the top of the cable tends to flatten downward, and the sidewall of the cable will crack and deform, which affects the normal use of the cable. SUMMARY

[0003] In order to improve the problem that after the cable is buried underground, the soil above the cable will generate downward pressure on the cable. After the cable withstands the pressure from the soil above for a long time, the top of the cable tends to flatten downward, and the sidewall of the cable will crack and deform, which affects the normal use of the cable. The present application provides a cross-linked polyethylene insulated power cable, which comprises a plurality of twisted together wire cores, the wire core comprises a conductor and an insulating shielding layer wrapped around the conductor, an inner sheath is arranged outside the wire core, a waterproof filling layer is arranged between the inner sheath and the wire core, a steel tape armor layer is wrapped around the outer periphery of the inner sheath, an outer sheath is wrapped around the outer periphery of the steel tape armor layer, an installation plane is arranged at the top of the outer sheath, a fixed keel is detachably installed on the installation plane, a plurality of annular support keels are arranged outside the outer sheath, and the support keels and the fixed keel are detachably connected together.

[0004] By adopting the above scheme, under the cooperation of the fixed keel and the support keel, when the cable is placed on the ground or buried underground, the support keel can support the cable to prevent the cable from deforming under the action of its own gravity or external pressure. When facing uneven ground, the fixed keel can support the cable to avoid the situation that when the cable bottom is uneven and is directly buried without timely filling, the cable above the uneven edge position is subjected to a large longitudinal shear force and is bent and broken, which affects the normal use of the cable.

[0005] Further, the installation plane is provided with an installation slot along the cable length direction, the fixed keel comprises a support part and a connecting part which are integrally arranged in an up-down mode, the connecting part extends into the installation slot, a plurality of fixing holes are formed on the connecting part, and the plurality of fixing holes correspond to the plurality of support keels one by one.

[0006] A plurality of through holes are formed on the outer sheath, the plurality of through holes are communicated with the plurality of fixing holes one by one.

[0007] The support keel comprises two symmetrically arranged arc-shaped support parts, and the top of each support part is integrally provided with a plug-in part which is matched with the through hole and the fixing hole, and the plug-in part extends into the fixing hole through the through hole.

[0008] By using the above technical scheme, the plug-in part extends into the fixing hole through the plug-in hole, thereby realizing the detachable connection among the fixed keel, the outer sheath and the support keel, and the operation is simple and the installation is convenient.

[0009] By using the above scheme, the annular groove can limit the support keel, so that the support keel is more stable.

[0010] Further, the depth of the annular groove is less than the thickness of the support keel.

[0011] By using the above scheme, when the staff drags the cable to move, the support keel can support the cable, so as to avoid the cable from being dragged on the ground as much as possible and reduce the abrasion of the cable.

[0012] Further, the end face of the end of the plug-in part away from the support part is provided with a layout groove which extends to the upper surface of the plug-in part, a fixed column is vertically fixed in the layout groove, the cross section of the fixed column is semicircular, the plug-in parts on the two support keels are inserted into the fixing holes to form a cylindrical clamping column, and the outer periphery of the clamping column is provided with threads.

[0013] Correspondingly, a circular clamping hole is formed in the upper wall of the fixing hole, a clamping part with a circular cross section is slidably connected in the clamping hole, a screw hole matched with the clamping column is formed in the bottom end of the clamping part, and the clamping column is threadedly connected in the screw hole.

[0014] By adopting the above scheme, the connecting part of the fixed keel is installed into the mounting groove of the mounting plane, and a plurality of fixing holes on the fixed keel are aligned with the through holes in the annular grooves on the outer sheath, then a plurality of support keels are installed into the annular grooves of the outer sheath in sequence, in the process of installing the support keel, the two supporting parts of the support keel are installed into the annular grooves from the two sides of the outer sheath in a splicing manner, and the inserting parts on the supporting parts penetrate into the fixing holes through the through holes and abut against each other, then the clamping part is sleeved through the clamping hole to the clamping column, and the clamping part is screwed until the two supporting parts are fixed, so that the detachable connection among the support keel, the outer sheath and the fixed keel is realized through one clamping part, the installation is very convenient, the construction period is greatly saved, and the construction cost is saved.

[0015] Further, the support keel is provided with an arc-shaped guard plate on the periphery.

[0016] By adopting the above scheme, the guard plates on the two sides of the outer sheath can protect the cable and prevent external insects and mice from gnawing and damaging the outer sheath.

[0017] Further, the connecting groove is a groove opened along the arc of the supporting part, and the groove is opened to one end of the connecting groove away from the inserting part.

[0018] The fixed column is vertically provided with a notch, and a sliding groove is horizontally opened in the inner wall of the notch.

[0019] A communication hole is opened in the inner wall of the arrangement groove and communicates with the connecting groove.

[0020] The driving assembly comprises an adjusting part slidably connected into the notch, a sliding block is fixedly connected to the adjusting part, the sliding block is slidably connected into the sliding groove, a guide inclined surface is arranged on one side of the adjusting part, and the guide inclined surface extends out of the notch.

[0021] The driving assembly further comprises an elastic part arranged in the groove, one end of the elastic part is connected with the connecting part, the other end of the elastic part is connected with the supporting part, and the connecting part is located in the groove under the action of the elastic part.

[0022] A connecting line is arranged between the connecting part and the adjusting part, and the connecting line penetrates through the communication hole.

[0023] By adopting the above scheme, during the cable arrangement process, the connecting part of the fixed keel is installed into the installation groove of the installation plane, and the plurality of fixing holes on the fixed keel are aligned with the through holes in the annular groove on the outer sheath, then the plurality of supporting keels are installed into the annular groove of the outer sheath in sequence, during the installation of the supporting keel, the two supporting parts of the supporting keel are installed into the annular groove in a splicing manner from the two sides of the outer sheath, and the inserting parts on the supporting parts are inserted into the fixing holes through the through holes and abut against each other, then the clamping part is sleeved through the clamping hole to the clamping column and the clamping part is screwed until the two supporting parts are fixed, then the connecting protrusions of the two protective plates are installed into the connecting grooves on the two protective plates symmetrical to the left and right, then the clamping part is continuously screwed, and the clamping part drives the adjusting part to move into the notch during the downward movement, and in this process, the adjusting part drives one end of the connecting part to move into the connecting hole on the connecting protrusion through the connecting line, so that the fixing of the protective plate is realized. The operation is simple and convenient.

[0024] Further, the outer circumferential surface of the supporting part is provided with an observation window communicating with the groove, the elastic part is fixedly connected with a hook, and the groove is provided with a hanging ring.

[0025] The inner wall of the sliding groove is vertically provided with a sliding channel extending to the upper surface of the fixed column, and the outer circumferential surface of the supporting part and the upper surface of the inserting part are both provided with a through hole communicating with the communicating hole for the connecting line to pass through.

[0026] By adopting the above scheme, the part of the cable where the protective plate is not needed to be installed does not need to be installed with the adjusting part, the connecting line, the connecting part and the elastic part. The part of the cable where the protective plate is needed to be installed, the adjusting part can be slid from the top of the fixed column to the bottom of the notch, then the connecting line is passed through the through hole, and then the connecting part and the elastic part are installed into the groove, and then the hook on the elastic part is hooked into the hanging ring through the observation window.

[0027] Further, the connecting line comprises a main body part and an installation part which are integrally arranged, the main body part is connected with the connecting part, and the installation part is connected with the adjusting part. The diameter of the through hole is greater than that of the installation part and smaller than that of the main body part.

[0028] By adopting the above scheme, during the installation of the connecting mechanism, the installation part is passed through the through hole, then the connecting part is installed into the groove, and then the main body part is located below the through hole and the installation part is dislocated from the through hole. Since the diameter of the main body part is greater than that of the through hole, the connecting line can be prevented from being separated from the through hole as much as possible, and the connecting line is more stable.

[0029] In summary, the present application has at least the following beneficial effects: 1. By setting the fixed keel and the supporting keel on the cable, the fixed keel and the supporting keel cooperate, and when the cable is placed on the ground or buried underground, the supporting keel can support the cable to prevent the cable from deforming under the action of its own gravity or external pressure. When facing uneven ground, the fixed keel can support the cable to avoid the cable breaking due to the shear force at a certain position on the cable when the cable is directly buried after the uneven ground is not timely filled and treated;

[0030] 2. By setting the guard plate on the periphery of the cable, the guard plates on both sides of the cable can protect the cable from being eaten and damaged by external insects and mice;

[0031] 3. By setting the connecting mechanism between the guard plate and the supporting piece, during the arrangement of the cable, the connecting part of the fixed keel is installed into the installation groove of the installation plane, and the plurality of fixing holes on the fixed keel are aligned with the perforations in the annular groove on the outer sheath, and then the plurality of supporting keels are installed into the annular groove of the outer sheath, and during the installation of the supporting keel, the two supporting pieces of the supporting keel are installed into the annular groove from both sides of the outer sheath in a splicing manner, and the plug-in pieces on the supporting pieces pass through the perforations and extend into the fixing holes to abut together, and then the clamping piece is sleeved through the clamping hole to the clamping column and the clamping piece is screwed until the two supporting pieces are fixed, and then the connecting protrusions of the two guard plates are installed into the connecting grooves on the two guard plates symmetrically, and then the clamping piece is continued to be screwed, and the adjusting piece moves towards the gap during the downward movement of the clamping piece, and in this process, the adjusting piece moves one end of the connecting piece into the connecting hole on the connecting protrusion through the connecting line, thereby fixing the guard plate. Simple and convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic view showing the internal structure of the cable in the present embodiment;

[0033] Figure 2 is a schematic view showing the overall structure of the cable in the present embodiment;

[0034] Figure 3 is a sectional view showing the arrangement structure of the fixed keel on the outer sheath in the present embodiment;

[0035] Figure 4 is Figure 3 is a partial enlarged view of part A in the present embodiment;

[0036] Figure 5 is a schematic view showing the connecting structure of the supporting keel and the guard plate in the present embodiment;

[0037] Figure 6 is a schematic view showing the connection mechanism in the embodiment;

[0038] Figure 7 is a schematic view showing the connection mechanism in the embodiment; Figure 5 is a partial enlarged schematic view of part B in the embodiment;

[0039] Figure 8 is a schematic view showing the connection structure of the guard plate and the support in the embodiment;

[0040] Figure 9 is a schematic view showing the connection structure of the guard plate and the support in the embodiment; Figure 8 is a partial enlarged schematic view of part C in the embodiment;

[0041] Figure 10 is a schematic view showing the structure of the adjusting member in the embodiment;

[0042] Figure 11 is a schematic view showing the structure of the adjusting member in the embodiment.

[0043] Legend of reference signs:

[0044] 1, core; 11, wire; 12, insulating shielding layer; 2, inner sheath; 21, waterproof filling layer; 3, steel tape armor layer; 4, outer sheath; 41, mounting plane; 411, mounting groove; 42, annular groove; 43, through hole; 5, fixed keel; 51, support part; 52, connecting part; 521, fixing hole; 53, clamping hole; 54, clamping member; 541, screw hole; 6, support keel; 61, support member; 611, plug-in member; 6111, arrangement groove; 612, connecting groove; 613, recess; 6131, hanging ring; 614, communication hole; 615, observation window; 616, through hole; 7, clamping column; 71, fixed column; 711, notch; 7111, sliding groove; 7112, sliding channel; 8, guard plate; 9, connection mechanism; 90, connecting protrusion; 901, connecting hole; 902, opening; 91, connecting member; 92, elastic member; 921, hook; 93, adjusting member; 931, sliding block; 932, guide inclined surface; 94, connecting wire. DETAILED DESCRIPTION

[0045] The crosslinked polyethylene insulated power cable provided by the application embodiment, with reference to Figure 1 includes a plurality of cores 1 wound together, the core 1 includes a wire 11 and an insulating shielding layer 12 wrapped around the wire 11, the core 1 is sleeved with an inner sheath 2, a waterproof filling layer 21 is arranged between the inner sheath 2 and the core 1, the inner sheath 2 is wrapped with a steel tape armor layer 3, and the steel tape armor layer 3 is wrapped with an outer sheath 4.

[0046] With reference to Figure 1 and Figure 2The top of the outer sheath 4 is provided with a mounting plane 41, and the fixed keel 5 is detachably mounted on the mounting plane 41. The upper surface of the fixed keel 5 is an arc surface, and the fixed keel 5 is spliced together with the cable to form a cylindrical shape. Further, the outer periphery of the outer sheath 4 is provided with a plurality of annular support keels 6 adapted to the cable. A plurality of annular grooves 42 adapted to the support keels are formed on the outer peripheral surface of the outer sheath 4. The plurality of annular grooves 42 correspond to the plurality of support keels 6 in one-to-one correspondence. The support keels 6 are detachably connected together with the fixed keel 5.

[0047] Under the cooperation of the fixed keel 5 and the support keel 6, when the cable is placed on the ground or buried underground, the support keel 6 can support the cable to prevent the cable from deforming under the action of its own gravity or external pressure. When facing uneven ground, the fixed keel 5 can support the cable to avoid, as much as possible, the cable from being bent and broken at the edge of the pit on the ground when the cable is directly buried in the ground without filling the pit, thereby affecting the normal use of the cable.

[0048] Specifically, the mounting plane 41 is provided with a mounting groove 411 arranged along the length direction of the cable. Correspondingly, the fixed keel 5 includes a support portion 51 and a connecting portion 52 integrally arranged in an upper-lower manner. The upper surface of the support portion 51 is an arc surface. The connecting portion 52 is adapted to the mounting groove 411. The connecting portion 52 extends into the mounting groove 411, and the connecting portion 52 is in sliding connection with the cable.

[0049] Referring to Figure 3 and Figure 4 , a plurality of fixing holes 521 are uniformly formed on the connecting portion 52 along the length direction of the connecting portion 52. The plurality of fixing holes 521 are uniformly arranged along the length direction of the connecting portion 52, and correspond to the plurality of support keels 6 in one-to-one correspondence. A through hole 43 is formed between the two ends of the top of the annular groove 42. The through hole 43 is aligned and communicated with the fixing hole 521.

[0050] Referring to Figure 5 , the support keel 6 is spliced by two symmetrically arranged arc-shaped support pieces 61. The support piece 61 is integrally provided with a plug-in piece 611 adapted to the through hole 43 and the fixing hole 521 at the top. The plug-in piece 611 extends into the fixing hole 521 through the through hole 43, thereby realizing the detachable connection among the fixed keel 5, the cable and the support keel 6.

[0051] Further, the thickness of the support piece 61 is greater than the depth of the annular groove 42. After the support keel 6 is arranged on the cable, the support keel 6 extends out of the annular groove 42. When the staff drags the cable to move, the support keel 6 can effectively support the outer sheath 4 to avoid, as much as possible, the outer sheath 4 of the cable from being dragged on the ground, thereby reducing the wear of the outer sheath 4 of the cable.

[0052] Referring to Figure 6 and Figure 7 In order to make the connection between the support joist 6, the outer sheath 4 and the fixed joist 5 more stable, the end face of the insertion piece 611 away from the support piece 61 is provided with a layout groove 6111, the layout groove 6111 extends to the upper surface of the insertion piece 611, and the lower wall in the layout groove 6111 is vertically fixedly connected with a fixed column 71, the cross section of the fixed column 71 is semicircular, and the insertion pieces 611 on the two mutually symmetrical support pieces 61 abut together, at this time, the fixed columns 71 on the two support pieces 61 are spliced together to form a cylindrical clamping column 7, and the outer circumferential surface of the clamping column 7 is provided with threads.

[0053] The upper wall in the fixed hole 521 is provided with a circular clamping hole 53, and a cylindrical clamping piece 54 is slidably connected in the clamping hole 53, the bottom end of the clamping piece 54 is provided with a threaded hole 541 matched with the clamping column 7, the clamping column 7 extends into the threaded hole 541, and the clamping column 7 is threadedly connected with the clamping piece 54. In order to facilitate the screwing of the clamping column 7, a keyway is formed in the upper end face of the clamping column 7, which facilitates the screwing of the staff using tools.

[0054] The connecting portion 52 of the fixed joist 5 is installed into the installation groove 411 of the installation plane 41, and the plurality of fixed holes 521 on the fixed joist 5 are aligned with the through holes 43 in the plurality of annular grooves 42 on the outer sheath 4, and then the plurality of support joists 6 are installed into the annular grooves 42 of the outer sheath 4 in sequence. During the installation of the support joist 6, the two support pieces 61 of the support joist 6 are installed into the annular grooves 42 in a splicing manner from the two sides of the cable, and the insertion pieces 611 on the support pieces 61 extend into the fixed holes 521 through the through holes 43 and abut together, and then the clamping piece 54 is sleeved onto the clamping column 7 through the clamping hole 53, and the clamping piece 54 is screwed until the two support pieces 61 are fixed. In this way, the detachable connection between the support joist 6, the outer sheath 4 and the fixed joist 5 is realized by one clamping piece 54, which is very convenient to install, greatly saves the construction period and saves the construction cost.

[0055] Further, the periphery of the support joist 6 is provided with an arc-shaped guard plate 8, and the arc of the guard plate 8 is matched with the outer sheath 4. The guard plates 8 on the two sides of the outer sheath 4 can protect the outer sheath 4 from being gnawed and damaged by external insects and mice.

[0056] Referring to Figure 8 The guard plate 8 and the support piece 61 are provided with a connecting mechanism 9, and the guard plate 8 is detachably connected with the support piece 61 through the connecting mechanism 9. In this way, the staff can choose whether to install the guard plate 8 during the laying of the cable according to the consideration of the environment of the laying site, so as to achieve the purpose of reducing cost and increasing efficiency.

[0057] Specifically, the outer circumferential surface of the support 61 of the support keel 6 is provided with a connecting groove 612 matched with the curvature of the support 61, and a recess 613 is formed in the inner wall of the connecting groove 612.

[0058] The connecting mechanism 9 comprises a connecting protrusion 90 matched with the connecting groove 612, and the connecting protrusion 90 is inserted into the connecting groove 612.

[0059] Referring to Figure 8 and Figure 9 , a connecting hole 901 is formed in the connecting protrusion 90 and aligned with the recess 613. The connecting mechanism 9 further comprises a connecting piece 91 slidingly connected in the recess 613, and a driving assembly for driving the connecting piece 91 to reciprocate in the recess 613. After the connecting protrusion on the guard plate 8 is inserted into the connecting groove 612, the connecting piece 91 is extended into the connecting hole 901 by the driving assembly to fix the guard plate 8.

[0060] In order to make the laying of the cable more convenient, the recess 613 is formed in the end surface of the connecting groove 612 away from the plug-in piece 611, and the curvature of the recess 613 is matched with the curvature of the support 61.

[0061] Referring to Figure 7 , a notch 711 is vertically formed in the fixed column 71. A communication hole 614 is formed in the inner wall of the arrangement groove 6111 and communicates with the recess 613.

[0062] Referring to Figure 11 , the driving assembly comprises an elastic piece 92 mounted in the recess 613, one end of the elastic piece 92 is connected with the support 61, and the other end of the elastic piece 92 is connected with the connecting piece 91. Under the action of the elastic piece 92, the connecting piece 91 is located in the recess 613.

[0063] The driving assembly further comprises an adjusting piece 93 slidingly connected in the notch 711.

[0064] Referring to Figure 6 , one side of the adjusting piece 93 extends out of the notch 711, and a guide inclined surface 932 is formed on the side of the adjusting piece 93 extending out of the notch 711. A sliding groove 7111 is horizontally formed in the inner wall of the notch 711, and a sliding block 931 matched with the sliding groove 7111 is fixedly connected to the adjusting piece 93, and the sliding block 931 is slidingly connected to the sliding groove 7111.

[0065] A connecting line 94 is fixedly connected between the adjusting piece 93 and the connecting piece 91, and the connecting line 94 can be made of steel wire or other materials. The connecting line 94 passes through the communication hole 614 and the connecting groove 612. The inner circumferential surface of the corresponding connecting protrusion 90 is provided with an opening 902 for the connecting line 94 to pass through. The opening 902 communicates with the connecting hole.

[0066] In the process of cable arrangement, the connecting part 52 of the fixed keel 5 is installed into the installation groove 411 of the installation plane 41, and a plurality of fixing holes 521 on the fixed keel 5 are aligned with the through holes 43 in the annular groove 42 on the cable, then a plurality of support keels 6 are installed into the annular groove 42 of the outer sheath 4 in sequence, in the process of installing the support keel 6, two support pieces 61 of the support keel 6 are installed into the annular groove 42 from both sides of the outer sheath 4 in a splicing manner, and the plug-in pieces 611 on the support pieces 61 are inserted into the fixing holes 521 through the through holes 43 to abut together, then the clamping piece 54 is sleeved to the clamping column 7 through the clamping hole 53, and the clamping piece 54 is screwed until the two support pieces 61 are fixed, then the connecting protrusions 90 of the two guard plates 8 are installed into the connecting grooves 612 on the two guard plates 8 which are symmetrical to each other, then the clamping piece 54 is continuously screwed, and the clamping piece 54 drives the adjusting piece 93 to move into the notch 711 in the process of moving downward, in this process, the adjusting piece 93 drives one end of the connecting piece 91 to move into the connecting hole 901 on the connecting protrusion 90 through the connecting line 94, so as to realize the fixation of the guard plate 8. The operation is simple and convenient.

[0067] With reference to Figure 8 and Figure 10 , the outer peripheral surface of the support piece 61 is provided with an observation window 615 which is in communication with the groove 613, and the diameter of the observation window 615 is smaller than that of the groove 613. The groove 613 is provided with a hanging ring 6131, and correspondingly, one end of the elastic piece 92 away from the connecting piece 91 is fixedly connected with a hook 921 which is hooked into the hanging ring 6131 in the groove 613. A slide 7112 is vertically arranged on the upper wall in the sliding groove 7111 in the notch 711, and the slide 7112 extends to the upper surface of the fixed column 71.

[0068] With reference to Figure 5 , the outer peripheral surface of the support piece 61 and the upper surface of the plug-in piece 611 are both provided with a through hole 616 which is in communication with the communication hole 614. In this way, the detachable installation of the adjusting piece 93, the connecting line 94, the connecting piece 91 and the elastic piece 92 is realized. In the part of the cable where the guard plate 8 is not needed to be installed, the adjusting piece 93, the connecting line 94, the connecting piece 91 and the elastic piece 92 do not need to be installed. In the part of the cable where the guard plate 8 is needed to be installed, the worker can slide the adjusting piece 93 downward from the top of the fixed column 71 to the bottom of the notch 711, then make the connecting line 94 pass through the through hole 616, and then install the connecting piece 91 and the elastic piece 92 into the groove 613, and then hook the hook 921 on the elastic piece 92 into the hanging ring 6131 through the observation window 615.

[0069] Further, the connecting line 94 comprises a body part and a mounting part which are integrally arranged, one end of the body part is connected with the mounting part, and the other end of the body part is fixedly connected with the adjusting piece 93. One end of the mounting part is connected with the body part, and the other end of the mounting part is fixedly connected with the connecting piece 91. The diameter of the through hole 616 is larger than that of the mounting part and smaller than that of the body part. In this way, during the installation of the connecting mechanism 9, the mounting part is passed through the through hole 616, and then the connecting piece 91 is installed into the recess 613, at this time, the body part is located below the through hole 616, and the mounting part is misaligned with the through hole 616. Since the diameter of the body part is larger than that of the through hole 616, at this time, the connecting line 94 can be prevented from being separated from the through hole 43 as much as possible, so that the connecting line 94 is more stable.

[0070] The implementation principle of the present application is as follows: during the arrangement of the cable, the connecting part 52 of the fixed keel 5 is installed into the mounting groove 411 of the mounting plane 41, and the plurality of fixing holes 521 on the fixed keel 5 are aligned with the plurality of through holes 43 in the annular groove 42 on the cable, then the plurality of supporting keels 6 are installed into the annular groove 42 of the cable in sequence, during the installation of the supporting keel 6, the two supporting pieces 61 of the supporting keel 6 are installed into the annular groove 42 from both sides of the cable in a splicing manner, and the plug-in pieces 611 on the supporting pieces 61 are inserted into the fixing holes 521 through the through holes 43 and abut against each other, then the clamping piece 54 is sleeved to the clamping column 7 through the clamping hole 53, and the clamping piece 54 is screwed until the two supporting pieces 61 are fixed, then the connecting protrusions 90 of the two guard plates 8 are installed into the connecting grooves 612 on the two guard plates 8 which are symmetrical to each other, then the clamping piece 54 is continuously screwed, and the clamping piece 54 drives the adjusting piece 93 to move into the notch 711 during the downward movement, and in this process, the adjusting piece 93 drives one end of the connecting piece 91 to move into the connecting hole 901 on the connecting protrusion 90 through the connecting line 94, so as to realize the fixation of the guard plate 8. The operation is simple and convenient.

[0071] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are indicated by the same reference numerals. Therefore, any effective change made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A cross-linked polyethylene insulated power cable, comprising multiple bundles of wire cores (1) wound together, each wire core (1) comprising a conductor (11) and an insulating shielding layer (12) wrapped around the conductor (11), an inner sheath (2) surrounding the wire core (1), a waterproof filling layer (21) being provided between the inner sheath (2) and the wire core (1), a steel tape armor layer (3) surrounding the inner sheath (2), and an outer sheath (4) surrounding the steel tape armor layer (3), characterized in that: The top of the outer sheath (4) is provided with a mounting plane (41), and a mounting groove (411) is provided on the mounting plane (41). The mounting groove (411) is arranged along the length direction of the cable. A fixing keel (5) is detachably installed on the mounting plane (41). The fixing keel (5) includes a support part (51) and a connecting part (52) that are integrally arranged on the upper and lower sides. The upper surface of the support part (51) is an arc-shaped surface. The connecting part (52) is adapted to the mounting groove (411). The connecting part (52) extends into the mounting groove (411), and the connecting part (52) and the cable are slidably connected. A plurality of fixing holes (521) are evenly opened on the connecting part (52) along its own length direction. The plurality of fixing holes (521) are evenly arranged along the length direction of the connecting part (52). The plurality of fixing holes (521) correspond one-to-one with a plurality of supporting keels (6). A plurality of rings are opened on the outer circumferential surface of the outer sheath (4). A shaped groove (42) is provided, with several annular grooves (42) corresponding one-to-one with several supporting keels (6). A through hole (43) is opened between the two ends of the top of the annular groove (42), and several through holes (43) are connected one-to-one with several fixing holes (521). Several annular supporting keels (6) are sleeved around the outer sheath (4). The through hole (43) is opened to the top of the annular groove (42). The supporting keel (6) is located in the annular groove (42). The supporting keel (6) includes two symmetrically arranged arc-shaped support members (61). The top of the support member (61) is integrally provided with a plug-in member (611) adapted to the through hole (43) and the fixing hole (521). The plug-in member (611) passes through the through hole (43) and extends into the fixing hole (521). The supporting keel (6) and the fixing keel (5) are detachably connected together.

2. The cross-linked polyethylene insulated power cable according to claim 1, characterized in that, The depth of the annular groove (42) is less than the thickness of the supporting keel (6).

3. The cross-linked polyethylene insulated power cable according to claim 1, characterized in that, The end face of the connector (611) away from the support (61) is provided with a groove (6111), the groove (6111) extends to the upper surface of the connector (611), a fixing post (71) is vertically fixed in the groove (6111), the cross-section of the fixing post (71) is semi-circular, the connectors (611) on the two support keels (6) are inserted into the fixing hole (521) and spliced ​​to form a cylindrical snap-fit ​​post (7), the outer circumferential surface of the snap-fit ​​post (7) is provided with threads; A circular snap-fit ​​hole (53) is provided on the upper wall of the corresponding fixing hole (521). A snap-fit ​​member (54) with a circular cross-section is slidably connected in the snap-fit ​​hole (53). A screw hole (541) adapted to the snap-fit ​​post (7) is provided at the bottom end of the snap-fit ​​member (54). The snap-fit ​​post (7) is threaded into the screw hole (541).

4. A cross-linked polyethylene insulated power cable according to claim 3, characterized in that, An arc-shaped protective plate (8) is installed on the periphery of the supporting keel (6).

5. A cross-linked polyethylene insulated power cable according to claim 4, characterized in that: A connecting mechanism (9) is provided between the guard plate (8) and the supporting keel (6), and the guard plate (8) is detachably connected to the supporting keel (6) through the connecting mechanism (9); A connecting groove (612) is provided on the outer peripheral surface of the supporting keel (6), and a groove (613) is provided on the inner side wall of the connecting groove (612); The connecting mechanism (9) includes a connector (91) adapted to the groove (613) and a connecting protrusion (90) fixedly installed to the inner circumferential surface of the guard plate (8); The connector (91) is slidably connected to the groove (613), the connecting protrusion (90) is inserted into the connecting groove (612), and the connecting protrusion (90) is provided with a connecting hole (901) that is adapted to the connector (91); The connecting mechanism (9) further includes a driving component for driving the connector (91) to reciprocate within the groove (613). Under the action of the driving component, one end of the connector (91) extends into the connecting hole (901).

6. A cross-linked polyethylene insulated power cable according to claim 5, characterized in that, The connecting groove (612) is a groove (613) opened along the arc of the support member (61), and the groove (613) is opened to the end of the connecting groove (612) away from the plug member (611); The fixed column (71) is provided with a vertical notch (711), and the inner wall of the notch (711) is provided with a horizontal groove (7111); The inner wall of the arrangement groove (6111) is provided with a communication hole (614) that communicates with the connection groove (612); The drive assembly includes an adjusting member (93) slidably connected to the notch (711), a slider (931) fixedly connected to the adjusting member (93), the slider (931) slidably connected to the groove (7111), and a guide slope (932) provided on one side of the adjusting member (93), the guide slope (932) extending out of the notch (711); The drive assembly also includes an elastic element (92) disposed in the groove (613). One end of the elastic element (92) is connected to the connector (91), and the other end of the elastic element (92) is connected to the support (61). Under the action of the elastic element (92), the connector (91) is located in the groove (613). A connecting line (94) is provided between the connector (91) and the adjusting member (93), and the connecting line (94) passes through the connecting hole (614).

7. A cross-linked polyethylene insulated power cable according to claim 6, characterized in that, An observation window (615) communicating with a groove (613) is provided on the outer peripheral surface of the support member (61). A hook (921) is fixedly connected to the elastic member (92). A hanging ring (6131) is provided in the groove (613). The hook (921) is hooked to the hanging ring (6131). The upper wall of the groove (7111) is vertically provided with a slide (7112), which extends to the upper surface of the fixed column (71). The outer peripheral surface of the support member (61) and the upper surface of the plug member (611) are provided with through holes (616) that communicate with the connecting hole (614) for the connecting line (94) to pass through.

8. A cross-linked polyethylene insulated power cable according to claim 7, characterized in that, The connecting line (94) includes an integrally formed main body (941) and mounting part (942). The main body (941) is connected to the connector (91), and the mounting part (942) is connected to the adjusting part (93). The diameter of the through hole (616) is larger than that of the mounting part (942) and smaller than that of the main body (941).

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