Environment-friendly extruded insulation low-voltage power cable

Abstract

The application discloses an environment-friendly extruded insulation low-voltage power cable, and relates to the technical field of power cables, which comprises an outer rubber protection layer, the inner side of the outer rubber protection layer is sleeved with a buffer rubber sleeve, the inner side of the buffer rubber sleeve is bonded with a polyethylene plastic film, the inner side of the polyethylene plastic film is embedded with a multi-edge support ring, the inner side of the multi-edge support ring is provided with a clamping connecting groove, the inner side of the clamping connecting groove is embedded with a connecting rod, and a support cavity is formed between the connecting rod and the multi-edge support ring. The application has a scientific and reasonable structure and is safe and convenient to use. The connecting rod and the multi-edge support ring around the support cavity are moved by the clamping block, so that the pulling force can be uniformly transmitted to the whole cable, the whole cable is uniformly stressed from inside to outside, the integrity of the cable is ensured, the tensile resistance of the cable is improved, and the egg-shaped support frame is deformed on the inner side of the trapezoidal clamping groove plate, so that the external compression force is removed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power cable, in particular to an environment-friendly extruded insulation low-voltage power cable. BACKGROUND

[0002] As the core component of power transmission and distribution system, low-voltage cable is mainly applied to the scene below 1kV rated voltage, covering building power distribution, industrial equipment power supply, transportation infrastructure and new energy field. With the acceleration of urbanization and smart grid construction, low-voltage cable is facing more stringent technical challenges: it needs to maintain long-term stability in complex electromagnetic environment, high humidity or corrosive conditions, environmental regulations promote the application of halogen-free flame-retardant materials to reduce fire toxicity, the demand for flexible structure design is increasing to adapt to the dynamic wiring of automation equipment, and low-voltage cable is evolving towards high reliability, intelligent monitoring and green low-carbon to match smart city and sustainable development goals.

[0003] However, the existing low-voltage cable has weak tensile and compression resistance, which can easily be damaged by compression or tension during tension or dynamic and rapid wiring, reducing the service life of the cable and the convenience of use. In order to avoid the above technical problems, it is necessary to provide an environment-friendly extruded insulation low-voltage power cable to overcome the defects in the prior art. SUMMARY

[0004] The present application provides an environment-friendly extruded insulation low-voltage power cable, which can effectively solve the problem of weak tensile and compression resistance of the existing low-voltage cable, which can easily be damaged by compression or tension during tension or dynamic and rapid wiring, reducing the service life of the cable and the convenience of use.

[0005] To achieve the above purpose, the present application provides the following technical scheme: an environment-friendly extruded insulation low-voltage power cable, comprising an outer rubber protective layer, the inner side of the outer rubber protective layer is provided with a bending resistance assembly;

[0006] The bending resistance assembly comprises a buffer rubber sleeve;

[0007] The inner side of the outer rubber protective layer is sleeved with a buffer rubber sleeve, the inner side of the buffer rubber sleeve is bonded with a polyethylene plastic film, the inner side of the polyethylene plastic film is embedded with a multi-edge support ring, the inner side of the multi-edge support ring is provided with a clamping connection groove, the inner side of the clamping connection groove is embedded with a connecting rod, a support cavity is formed between the connecting rod and the multi-edge support ring, and the inner side of the support cavity is embedded with a clamping block;

[0008] The inner side of the multi-edge support ring is formed with a mounting groove, the inner side arc surface of the multi-edge support ring is welded with a top fixed rod, one end of the top fixed rod is welded with a fixed groove plate, the inner side of the fixed groove plate is provided with a fixed chamber, the inner side of the fixed chamber is embedded with an arc-shaped support rod, one side end surface of the fixed groove plate is welded with a bottom fixed rod, one end of the bottom fixed rod is welded with an inner insulation rubber sleeve, and the inner side of the inner insulation rubber sleeve is embedded with an electric core body.

[0009] According to the above technical scheme, the outer diameter of the buffer rubber sleeve is equal to the inner diameter of the outer rubber protection layer, and the contact surfaces of the buffer rubber sleeve and the outer rubber protection layer are rough curved surfaces.

[0010] According to the above technical scheme, the multi-edge support ring is provided with a plurality of multi-edge support rings, and the plurality of multi-edge support rings are embedded at equal intervals at the inner side position of the polyethylene plastic film.

[0011] According to the above technical scheme, the connecting rod is provided with a plurality of connecting rods, and the plurality of connecting rods are embedded at equal angles at the inner side position of the multi-edge support ring, and a plurality of support cavities are formed between the plurality of connecting rods and the plurality of multi-edge support rings.

[0012] According to the above technical scheme, the fixed groove plate is welded with a plurality of fixed groove plates, and the plurality of fixed groove plates are welded at equal angles at the inner side position of the multi-edge support ring, and the outer side arc surfaces of the arc-shaped support rods are smooth curved surfaces.

[0013] According to the above technical scheme, the outer side of the inner insulation rubber sleeve is bonded with a trapezoidal clamping groove plate, the inner side of the trapezoidal clamping groove plate is provided with an embedded groove, the outer side end surface of the trapezoidal clamping groove plate is welded with a top anti-slip plate, the outer side end surface of the trapezoidal clamping groove plate is welded with a bottom anti-slip plate, and the inner side of the embedded groove is provided with an egg-shaped support frame.

[0014] According to the above technical scheme, the top anti-slip plate is provided with two top anti-slip plates, and the two top anti-slip plates are symmetrically welded at the two side end surfaces of the trapezoidal clamping groove plate, and the egg-shaped support frame is embedded in the inner space of the two top anti-slip plates.

[0015] According to the above technical scheme, the outer side of the outer rubber protection layer is sleeved with a mounting assembly;

[0016] The mounting assembly comprises a front limiting ring;

[0017] The outer side of the outer rubber protection layer is sleeved with a front limiting ring, the outer side of the other cable is sleeved with a rear limiting ring, one end of the front limiting ring is welded with a clamping plate, the inner side of the clamping plate is threadedly connected with a clamping screw rod, the outer side of the front limiting ring is welded with a threaded groove cylinder, and the inner side of the threaded groove cylinder is slidably connected with an outward expanding rod.

[0018] The outer expansion rod is externally threadedly connected with a length nut, and the inner side of the outer expansion rod is slidably connected with an extension threaded rod, the outer side of the rear limiting ring is connected with an outer expansion fixing rod, one end of the outer expansion fixing rod is welded with a positioning threaded cylinder, and one end of the extension threaded rod is welded with a positioning ball.

[0019] According to the technical scheme, the two thread groove cylinders are symmetrically welded at the outer side end face of the front limiting ring, and the outer diameter of the outer expansion rod is equal to the inner diameter of the thread groove cylinder.

[0020] According to the technical scheme, the inner side of the outer expansion rod is provided with a movable groove at a corresponding position of the extension threaded rod, and the extension threaded rod is slidably connected with the outer expansion rod through the movable groove.

[0021] Compared with the prior art, the present application has the advantages of scientific and reasonable structure, safe and convenient use, and the like.

[0022] 1. The anti-bending assembly is provided, the connecting rods and the multi-edge support rings around the support cavity are moved by the clamping blocks, at this time, since the clamping blocks are uniformly distributed on the inner side of the outer rubber protection layer, the pulling force can be uniformly transmitted to the whole cable, so that the whole cable is uniformly stressed from the inside to the outside, the outer rubber protection layer is prevented from being broken due to local large stress of the cable, the integrity of the cable is ensured, the tensile capacity of the cable is improved, the stress range of the cable is improved during movement of the cable, and the use convenience of the cable is improved during urban construction. The egg-shaped support frame is deformed on the inner side of the trapezoidal clamping groove to release the external pressure, and the external force is uniformly distributed by the plurality of egg-shaped support frames, so that the battery core body is prevented from being damaged due to compression of a large number of cables during simultaneous deployment.

[0023] 2. The mounting assembly is provided, the cable is fixed by the front limiting ring and the rear limiting ring, so that the operator can not pull the cable and connect the cables at the same time, the two cables are kept in a relatively stable position for a long time, the operator can quickly connect the cables, the connecting part is moved outward by the two outer expansion rods, so that the operator is not blocked during connection, the convenience of operation is further improved, the stability of the cable connection part is improved by moving the front limiting ring and the rear limiting ring to the fixed position after connection, and the use stability and service life of the connected cable are further improved.

[0024] In summary, the compression resistance of the cable is further improved by the plurality of egg-shaped support frames and the two groups of arc-shaped support rods, the integrity of the cable is protected during installation of the cable, the cable is prevented from being damaged due to deformation, the installation efficiency of the cable is improved, and the service life of the cable is further prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are meant to explain the present application and are not intended to limit the application.

[0026] In the drawings:

[0027] Figure 1 is a structural schematic diagram of the present application;

[0028] Figure 2 is a structural schematic diagram of the installation of the trapezoidal clamping groove plate of the present application;

[0029] Figure 3 is a structural schematic diagram of the installation of the buffer rubber sleeve of the present application;

[0030] Figure 4 is a structural schematic diagram of the installation of the multi-edge support ring of the present application;

[0031] Figure 5 is a structural schematic diagram of the anti-bending assembly of the present application;

[0032] Figure 6 is a structural schematic diagram of the installation of the egg-shaped support frame of the present application;

[0033] Figure 7 is a structural schematic diagram of the installation of the front limiting ring of the present application;

[0034] Figure 8 is a structural schematic diagram of the installation assembly of the present application;

[0035] Figure 9 is a structural schematic diagram of the installation of the length nut of the present application;

[0036] Figure 10 is a structural schematic diagram of the installation of the outward-expanding fixed rod of the present application;

[0037] Reference numerals in the drawings: 1, outer rubber protection layer;

[0038] 2, anti-bending assembly; 201, buffer rubber sleeve; 202, polyethylene plastic film; 203, multi-edge support ring; 204, clamping connection groove; 205, connecting rod; 206, support cavity; 207, clamping block; 208, installation groove; 209, top fixed rod; 210, fixed groove plate; 211, fixed cavity; 212, arc-shaped support rod; 213, bottom fixed rod; 214, inner insulating rubber sleeve; 215, electric core body; 216, trapezoidal clamping groove plate; 217, embedded groove; 218, top anti-slip plate; 219, bottom anti-slip plate; 220, egg-shaped support frame;

[0039] 3. Installation components; 301. Front limiting ring; 302. Rear limiting ring; 303. Clamping plate; 304. Clamping screw; 305. Threaded grooved cylinder; 306. Outward expansion rod; 307. Length nut; 308. Extension threaded rod; 309. Outward expansion fixing rod; 310. Positioning threaded cylinder; 311. Positioning ball. Detailed Implementation

[0040] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0041] Example: Figures 1-10 As shown, the present invention provides a technical solution, an environmentally friendly extruded insulated low-voltage power cable, including an outer rubber protective layer 1, and an anti-bending component 2 installed on the inner side of the outer rubber protective layer 1;

[0042] The anti-bending component 2 includes a buffer rubber sleeve 201, a polyethylene plastic film 202, a polygonal support ring 203, a snap-fit ​​connection groove 204, a connecting rod 205, a support cavity 206, a snap-fit ​​block 207, a mounting groove 208, a top fixing rod 209, a fixing groove plate 210, a fixing chamber 211, an arc-shaped support rod 212, a bottom fixing rod 213, an inner insulating rubber sleeve 214, a battery cell 215, a trapezoidal snap-fit ​​groove plate 216, an embedded groove 217, a top anti-slip plate 218, a bottom anti-slip plate 219, and an egg-shaped support frame 220.

[0043] A buffer rubber sleeve 201 is fitted inside the outer rubber protective layer 1. The outer diameter of the buffer rubber sleeve 201 is equal to the inner diameter of the outer rubber protective layer 1. The contact surfaces of the buffer rubber sleeve 201 and the outer rubber protective layer 1 are both rough curved surfaces to facilitate uniform transmission of tensile force. A polyethylene plastic film 202 is bonded to the inner side of the buffer rubber sleeve 201. A plurality of polygonal support rings 203 are embedded in the inner side of the polyethylene plastic film 202. The plurality of polygonal support rings 203 are equidistantly embedded in the inner side of the polyethylene plastic film 202 to facilitate the formation of... The electromagnetic shielding mesh has a snap-fit ​​connection groove 204 on the inner side of the polygonal support ring 203. A connecting rod 205 is embedded in the inner side of the snap-fit ​​connection groove 204. A support cavity 206 is formed between the connecting rod 205 and the polygonal support ring 203. Several connecting rods 205 are provided, and several connecting rods 205 are embedded at equal angles in the inner position of the polygonal support ring 203. Several support cavities 206 are formed between several connecting rods 205 and several polygonal support rings 203, which is beneficial for supporting cables. A snap-fit ​​block 207 is embedded in the inner side of the support cavity 206.

[0044] The inner side of the multi-edge support ring 203 is formed with a mounting groove 208, and the inner side arc surface of the multi-edge support ring 203 is welded with a top fixed rod 209, one end of the top fixed rod 209 is welded with a fixed groove plate 210, and the fixed groove plate 210 is welded with a plurality of fixed groove plates 210, which are welded at equal angles at the inner side position of the multi-edge support ring 203, the outer arc surface of the arc-shaped support rod 212 is a smooth curved surface, which improves the folding resistance, the inner side of the fixed groove plate 210 is provided with a fixed cavity 211, the inner side of the fixed cavity 211 is embedded with the arc-shaped support rod 212, one side end surface of the fixed groove plate 210 is welded with a bottom fixed rod 213, one end of the bottom fixed rod 213 is welded with an inner insulation rubber sleeve 214, and the inner side of the inner insulation rubber sleeve 214 is embedded with an electric core body 215.

[0045] The outer side of the inner insulation rubber sleeve 214 is bonded with a trapezoidal clamping groove plate 216, the inner side of the trapezoidal clamping groove plate 216 is provided with an embedded groove 217, the outer side end surface of the trapezoidal clamping groove plate 216 is welded with a top anti-slip plate 218, the outer side end surface of the trapezoidal clamping groove plate 216 is welded with a bottom anti-slip plate 219, the embedded groove 217 is installed with an egg-shaped support frame 220, the top anti-slip plate 218 is provided with two, the two top anti-slip plates 218 are symmetrically welded on the two side end surfaces of the trapezoidal clamping groove plate 216, the egg-shaped support frame 220 is embedded in the inner space of the two top anti-slip plates 218, and the compression resistance of the cable is improved.

[0046] The outer side of the outer rubber protection layer 1 is sleeved with a mounting assembly 3;

[0047] The mounting assembly 3 comprises a front limiting ring 301, a rear limiting ring 302, a clamping plate 303, a clamping screw 304, a threaded groove cylinder 305, an outward expanding rod 306, a length nut 307, an extended threaded rod 308, an outward expanding fixed rod 309, a positioning threaded cylinder 310 and a positioning ball 311.

[0048] The outer side of the outer rubber protection layer 1 is sleeved with a front limiting ring 301, the outer side of another cable is sleeved with a rear limiting ring 302, one end of the front limiting ring 301 is welded with a clamping plate 303, the inner side of the clamping plate 303 is threadedly connected with a clamping screw 304, the outer side of the front limiting ring 301 is welded with a threaded groove cylinder 305, the inner side of the threaded groove cylinder 305 is slidably connected with an expanding rod 306, the threaded groove cylinder 305 is provided with two, the two threaded groove cylinders 305 are symmetrically welded on the outer side end face of the front limiting ring 301, the outer diameter of the expanding rod 306 is equal to the inner diameter of the threaded groove cylinder 305, which is beneficial to tensioning the cable, the outer side of the expanding rod 306 is threadedly connected with a length nut 307, the inner side of the expanding rod 306 is slidably connected with an extension threaded rod 308, the inner side of the expanding rod 306 is provided with a movable groove at the corresponding position of the extension threaded rod 308, the extension threaded rod 308 is slidably connected with the expanding rod 306 through the movable groove, which is beneficial to stabilizing the relative position of the cable, the outer side of the rear limiting ring 302 is connected with an expanding fixing rod 309, one end of the expanding fixing rod 309 is welded with a positioning threaded cylinder 310, one end of the extension threaded rod 308 is welded with a positioning ball 311.

[0049] The working principle and use process of the present application are as follows: first, when the operator fixes the cable, the operator needs to continuously pull the cable, the operator pulls the outer rubber protection layer 1, then moves the buffer rubber sleeve 201 through the outer rubber protection layer 1, and since the buffer rubber sleeve 201 is connected with the clamping block 207, the net tube composed of the multi-edge supporting ring 203 and the connecting rod 205 can be moved through the clamping block 207 and the supporting cavity 206, at this time, the pulling force can be uniformly transmitted through the net tube composed of the multi-edge supporting ring 203 and the connecting rod 205, and the pulling force is conducted to the whole cable, and in the process of cable extrusion forming, since the buffer rubber sleeve 201 is extruded and sleeved on the outer side of the supporting cavity 206 in a high temperature environment, when the cable is extrusion formed, part of the clamping block 207 compresses the polyethylene plastic film 202 to make the polyethylene plastic film 202 deform, the high-temperature buffer rubber sleeve 201 enters the inner side of the supporting cavity 206, and after cooling, the buffer rubber sleeve 201 in the supporting cavity 206 cools to form the clamping block 207;

[0050] Therefore, when the cable is pulled, the pulling force can be transmitted to the clamping block 207 through the outer rubber protection layer 1, and then the connecting rod 205 and the multi-edge support ring 203 around the support cavity 206 are moved by the clamping block 207. At this time, since the multiple clamping blocks 207 are uniformly distributed on the inner side of the outer rubber protection layer 1, the pulling force can be uniformly transmitted to the entire cable, so that the entire cable is uniformly stressed from the inside to the outside, preventing the outer rubber protection layer 1 from being broken due to local stress on the cable, ensuring the integrity of the cable and improving the tensile strength of the cable. The stress range of the cable is improved during the movement of the cable, and the use convenience of the cable is improved during the dynamic deployment of the cable during urban construction;

[0051] Next, when the cable needs to be bent, whether it is bent upward, downward, left or right, the inside of the multi-edge support ring 203 will appear, the layout of the two arc-shaped support rods 212 in the inner bending area and the two arc-shaped support rods 212 in the outer bending area. When bending, the two groups of arc-shaped support rods 212 can support the installation slot 208 inside, thereby preventing the cable from being bent and pressing the core body 215, and when bending, the arc-shaped support rod 212 in the outer bending area will pull the inner insulation rubber sleeve 214 and the core body 215 to the outer bending area through the top fixed rod 209, the fixed slot plate 210 and the bottom fixed rod 213, and the inner bending area will support the core body 215 outward, thereby further ensuring that the core body 215 of the cable will not be pressed and damaged, and further improving the bending resistance of the cable;

[0052] Next, when the cable is dynamically installed, a large number of cables will be installed at the same time, and the cables will press each other. At this time, the network formed by the multi-edge support ring 203 and the connecting rod 205 can provide preliminary support, and when the pressure is large, the deformed multi-edge support ring 203 will press the trapezoidal clamping slot plate 216, and then the deformed trapezoidal clamping slot plate 216 will continue to press the egg-shaped support frame 220. At this time, the egg-shaped support frame 220 will be fixed by the top anti-slip plate 218 on both sides, thereby preventing the displacement of the egg-shaped support frame 220. At this time, the egg-shaped support frame 220 will deform on the inner side of the trapezoidal clamping slot plate 216 to release the external pressure, and the multiple egg-shaped support frames 220 can uniformly distribute the external force, thereby preventing the core body 215 from being damaged when a large number of cables are deployed at the same time. The multiple egg-shaped support frames 220 and the two groups of arc-shaped support rods 212 can further improve the pressure resistance of the cable, protect the integrity of the cable during cable installation, prevent the cable from being damaged due to deformation, improve the installation efficiency of the cable, and further prolong the service life of the cable;

[0053] Finally, when connecting multiple cables, the front limiting ring 301 and the rear limiting ring 302 are respectively sleeved on the connecting end of the two cables, then the clamping screws 304 inside the multiple clamping plates 303 are respectively tightened, so as to fix the front limiting ring 301 and the rear limiting ring 302 with the two cables, then the two outer expansion rods 306 are respectively fixed on the inner side of the threaded groove cylinder 305 on both sides, then the two length nuts 307 are respectively tightened to the outer side of the two outer expansion rods 306, so as to fix the outer expansion rods 306, then the outer expansion fixing rod 309 is also fixed to the outer side of the rear limiting ring 302, then the extension threaded rod 308 is tightened to the inner side of the positioning threaded cylinder 310 through the outer expansion rod 306, and the positioning threaded cylinder 310 can be moved to the position of the front limiting ring 301 by continuously rotating the extension threaded rod 308, so that the two cables can be quickly pulled to the connection, at this time the operator can perform cable connection operation in the space of the two outer expansion rods 306;

[0054] The front limiting ring 301 and the rear limiting ring 302 are respectively fixed on the two cables, so that the operator can not pull the cable while performing the connection operation, and the two cables can be kept in a relatively stable position for a long time, so that the operator can quickly perform the cable connection, and the two outer expansion rods 306 move the connection outward, so that the operator's connection operation is not blocked, further improving the convenience of operation, and after the connection is completed, the stability of the cable connection can be improved by moving the front limiting ring 301 and the rear limiting ring 302 to the fixed position, further improving the use stability and service life of the connected cable.

[0055] Finally, it should be noted that: the above only describes the preferred examples of the present application and does not limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An environmentally friendly extruded insulated low-voltage power cable, comprising an outer rubber protective layer (1), characterized in that: An anti-bending component (2) is installed on the inner side of the outer rubber protective layer (1). The anti-bending component (2) includes a cushioning rubber sleeve (201); The outer rubber protective layer (1) is fitted with a buffer rubber sleeve (201) on its inner side. A polyethylene plastic film (202) is bonded to the inner side of the buffer rubber sleeve (201). A polygonal support ring (203) is embedded in the inner side of the polyethylene plastic film (202). A snap-fit ​​connection groove (204) is provided on the inner side of the polygonal support ring (203). A connecting rod (205) is embedded in the inner side of the snap-fit ​​connection groove (204). A support cavity (206) is formed between the connecting rod (205) and the polygonal support ring (203). A snap-fit ​​block (207) is embedded in the inner side of the support cavity (206). The inner side of the polygonal support ring (203) has an installation groove (208). A top fixing rod (209) is welded to the inner arc surface of the polygonal support ring (203). A fixing groove plate (210) is welded to one end of the top fixing rod (209). A fixing chamber (211) is opened on the inner side of the fixing groove plate (210). An arc-shaped support rod (212) is embedded in the inner side of the fixing chamber (211). A bottom fixing rod (213) is welded to one end face of the fixing groove plate (210). An inner insulating rubber sleeve (214) is welded to one end of the bottom fixing rod (213). A battery cell (215) is embedded in the inner side of the inner insulating rubber sleeve (214). An installation component (3) is sleeved on the outside of the outer rubber protective layer (1). The mounting component (3) includes a front limiting ring (301); A front limiting ring (301) is sleeved on the outer side of the outer rubber protective layer (1), and a rear limiting ring (302) is sleeved on the outer side of the other cable. A clamping plate (303) is welded to one end of the front limiting ring (301), and a clamping screw (304) is threaded to the inner side of the clamping plate (303). A threaded groove cylinder (305) is welded to the outer side of the front limiting ring (301), and an outer expansion rod (306) is slidably connected to the inner side of the threaded groove cylinder (305). The outer side of the expansion rod (306) is threaded with a length nut (307), the inner side of the expansion rod (306) is slidably connected with an extension threaded rod (308), the outer side of the rear limiting ring (302) is connected with an expansion fixing rod (309), one end of the expansion fixing rod (309) is welded with a positioning threaded cylinder (310), and one end of the extension threaded rod (308) is welded with a positioning ball (311).

2. The environmentally friendly extruded insulated low-voltage power cable according to claim 1, characterized in that: The outer diameter of the buffer rubber sleeve (201) is equal to the inner diameter of the outer rubber protective layer (1), and the contact surfaces of the buffer rubber sleeve (201) and the outer rubber protective layer (1) are both rough curved surfaces.

3. The environmentally friendly extruded insulated low-voltage power cable according to claim 1, characterized in that: The polygonal support rings (203) are provided in a plurality of positions, and the plurality of polygonal support rings (203) are equidistantly embedded in the inner side of the polyethylene plastic film (202).

4. The environmentally friendly extruded insulated low-voltage power cable according to claim 1, characterized in that: The connecting rod (205) is provided in a plurality of positions, and the plurality of connecting rods (205) are embedded at equal angles in the inner position of the polygonal support ring (203). A plurality of support cavities (206) are formed between the plurality of connecting rods (205) and the plurality of polygonal support rings (203).

5. The environmentally friendly extruded insulated low-voltage power cable according to claim 1, characterized in that: The fixed groove plate (210) is welded in several places. The fixed groove plates (210) are welded at equal angles to the inner side of the polygonal support ring (203). The outer arc surface of the arc-shaped support rod (212) is a smooth curved surface.

6. The environmentally friendly extruded insulated low-voltage power cable according to claim 1, characterized in that: The outer side of the inner insulating rubber sleeve (214) is bonded with a trapezoidal snap-fit ​​groove plate (216), the inner side of the trapezoidal snap-fit ​​groove plate (216) is provided with an embedding groove (217), the outer end face of the trapezoidal snap-fit ​​groove plate (216) is welded with a top anti-slip plate (218), the outer end face of the trapezoidal snap-fit ​​groove plate (216) is welded with a bottom anti-slip plate (219), and an egg-shaped support frame (220) is installed on the inner side of the embedding groove (217).

7. The environmentally friendly extruded insulated low-voltage power cable according to claim 6, characterized in that: Two top stop plates (218) are provided. The two top stop plates (218) are symmetrically welded to the two end faces of the trapezoidal snap-fit ​​groove plate (216). The egg-shaped support frame (220) is embedded in the internal space of the two top stop plates (218).

8. The environmentally friendly extruded insulated low-voltage power cable according to claim 1, characterized in that: Two threaded grooved cylinders (305) are provided, and the two threaded grooved cylinders (305) are symmetrically welded to the outer end face of the front limiting ring (301). The outer diameter of the outer expansion rod (306) is equal to the inner diameter of the threaded grooved cylinder (305).

9. The environmentally friendly extruded insulated low-voltage power cable according to claim 8, characterized in that: The inner side of the expansion rod (306) is provided with a movable groove at the position corresponding to the extension threaded rod (308), and the extension threaded rod (308) is slidably connected to the expansion rod (306) through the movable groove.

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