Rat biting prevention cloth electric wire for outdoor and pipe gallery
By designing the outer sheath of a spiral dense spiral structure and a metal armor layer with a longitudinal wrap of galvanized steel belt on the cable, combined with the glass fiber reinforced crosslinked polyvinyl chloride material, the problem of damage to the cable when nibbling is solved, achieving efficient rat-proof and good bending performance.
Patent Information
- Application Number
- CN202421780563.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-25
AI Technical Summary
Existing cables are easily damaged when chewed by rats, and existing rat-proof technology has problems such as environmental pollution, high cost, and poor bending performance.
A rat-proof cloth wire for outdoor and pipe corridors is designed, using a spiral dense spiral structure with an outer sheath and a metal armor layer with a longitudinal wrap of galvanized steel belt. Combined with glass fiber reinforced crosslinked polyvinyl chloride material, it enhances the rat-proof and bending performance of the cable.
It effectively avoids cable damage caused by rat bites, saves materials and costs, improves the bending performance and stability of the cable, and facilitates the layout of the cable.
Smart Images
Figure CN222980184U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of transmission cables, and in particular relates to a rat-proof cloth electric wire for outdoor use and a pipe gallery. Background Art
[0002] A more prominent problem is that cables are damaged or even completely destroyed by the gnawing of rodents. In areas with well-developed vegetation and good natural conditions, there are often a large number of rodents breeding and surviving. As a rodent with strong vitality, rodents usually have the habit of gnawing objects to keep their teeth sharp and of appropriate length because their incisors are very developed and continue to grow. When cables laid outdoors or in building corridors become the target of rodents, the protective layer and even the cable core of the cable are easily damaged, resulting in line interruption, which has a serious impact on the stable operation of the feeder service and network maintenance.
[0003] The existing anti-rat bite technology used in cables is generally divided into the following two types:
[0004] One is the chemical method: using rodenticides, olfactory repellents and taste repellents, such as capsaicin, on the cable sheath or around the laying. This method mostly uses toxic and harmful substances, which can easily cause environmental pollution. At the same time, the cable is in the natural environment for a long time, affected by factors such as light, heat, chemical erosion and oxidation effects. The chemical reagents in the sheath and the surrounding area may gradually disappear, making it difficult for the cable to maintain long-term rodent-proof performance.
[0005] The other is the physical way:
[0006] (1) Increase the outer diameter of the cable or increase the outer diameter of the cable in disguise by using a pipe gallery, so that the outer diameter of the cable is larger than the opening height of the rodents, so that they give up biting. However, this method is not only easy to increase costs and is not conducive to popularization, but also leads to increased cable weight or laying difficulty, which is not conducive to cable bending and other problems; secondly, the internal space of some pipe galleries is large, and it is still easy for small rodents to enter, causing damage to the cable;
[0007] (2) Wrap glass fiber non-woven fabric around the outside of the cable core, and use the sharp spikes of the glass fiber to prevent rodents from gnawing. However, in an environment where rodents are gnawing for a long time, the non-metallic glass fiber non-woven fabric layer will be gradually and completely destroyed, thereby losing its protective effect on the cable.
[0008] (3) A metal armor layer is adopted on the outer side of the cable core, that is, a single-layer or multi-layer metal armor protection layer is used, such as galvanized steel strip, copper strip, stainless steel pipe, etc., to protect the internal structure of the cable. Since the armor layer has a high hardness and it is difficult for rodents to bite through, it can achieve the effect of preventing rats while improving the mechanical and physical properties of the cable. This method is currently widely used, but there are problems such as increasing the weight and cost of the cable and reducing the bending performance of the cable, which is not conducive to construction and laying. Secondly, the traditional metal armor layer adopts a longitudinal wrapping and overlapping method, and the overlapping part of the armor layer is still easily bitten by rats and finally damages the cable core. Summary of the Utility Model
[0009] In view of this, in order to solve the problems existing in the prior art, the purpose of the present utility model is to provide a rat-proof cloth wire for outdoor and pipe gallery use, which has good bending performance, is convenient for cable laying, and can effectively prevent damage to the cable by rodents such as rats.
[0010] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:
[0011] A rat-proof cloth wire for outdoor and pipe gallery use, which includes: a plurality of power lines, an inner lining layer, a metal armor layer, and an outer sheath. A plurality of the power lines are all arranged in the inner lining layer, and the inner lining layer, the metal armor layer, and the outer sheath are sleeved in sequence from inside to outside;
[0012] The metal armor layer includes a spiral corrugated structure, and the outer sheath includes a spiral dense spiral pattern structure, and the thread rotation direction of the corrugated structure is the same as the thread rotation direction of the dense spiral pattern structure.
[0013] The specific technical effect is that the power lines, the inner lining layer, the metal armor layer, and the outer sheath are sleeved in sequence from inside to outside, with good bending performance and good overall stability of the cable. By designing the outer sheath as a spiral dense spiral pattern structure, it not only increases the outer diameter of the cable but also minimizes the weight of the cable as much as possible. When the outer diameter size of the cable is larger than the maximum opening width of rats, it can effectively avoid being bitten by rats, save materials, reduce costs, improve the bending performance of the cable, and facilitate the laying of the cable.
[0014] Furthermore, the outer sheath further includes an inner ring structure, the inner ring structure is sleeved outside the corrugated structure, and the dense spiral pattern structure is sleeved outside the inner ring structure.
[0015] The specific technical effect is that by the inner ring structure and the dense spiral pattern structure, the outer diameter of the cable is increased, so that the outer diameter of the cable is larger than the opening height of rodents, causing them to give up biting.
[0016] Furthermore, the thread width L1 of the dense spiral thread structure is 2 mm to 3 mm, the thread depth H1 of the dense spiral thread structure is H1 > 10 mm, and the thickness H2 of the inner ring structure is 1.8 mm to 2 mm.
[0017] The specific technical effect is as follows: The purpose of adopting such a size design is to reduce the force-bearing surface and force-bearing angle during rodent gnawing. Research shows that when rodents gnaw hard objects, a single gnawing action by the rodents is not sufficient to separate the object, and it is necessary to repeat the action multiple times with the upper and lower incisors not closed. Looking from the side, the lower incisors seem to "cut" the object towards the direction of the upper incisors. Exactly speaking, the actual action of the lower incisors is to repeatedly "chisel" the object. The "chiseling" of the incisors is changed from the basic gnawing action. First, the mandible moves downward, and then drives the lower incisors forward and upward so that the edge of the incisors acts on the object, and this action will be repeated until the object is broken and separated. The front paws and the upper incisors play the role of "clamping" - tightly grasping the object to counteract the "chiseling" of the lower incisors. And the width of the front teeth of common rodents is 1 mm to 2 mm, the normal length of the front teeth is 4 mm below the gum, and the lower front teeth are 7 mm. Therefore, when setting the thread width, considering the width of the front teeth of common rodents in the laying environment, taking a value less than the width of its two front teeth, and the thread depth is greater than the length of its front teeth, this can minimize the force-bearing surface during rodent gnawing and is not conducive to fixing the position of the lower incisors and the front paws.
[0018] Furthermore, the outer sheath is made of cross-linked polyvinyl chloride containing glass fiber, wherein the mass ratio of the glass fiber is 25% to 40%, and the Vickers hardness of the outer sheath is greater than 90 HV.
[0019] The specific technical effect is as follows: Using cross-linked polyvinyl chloride reinforced with glass fiber, its material hardness is similar to that of nylon, which can effectively reduce the gnawing of rodents. Compared with the commonly used anti-rat nylon sheath, the material cost of the present utility model is lower, which is conducive to the popularization and application of the product; at the same time, due to the presence of glass fiber in the polyvinyl chloride material, when the outer sheath is gnawed by rats, the mixed glass fiber in the middle will be exposed. Since the glass fiber is extremely sharp, during the process of rodent gnawing, the glass fiber will stab its mouth, making the rodents have a sense of fear of the cable, and using the physical stinging sensation to achieve the effect of preventing rat bites; compared with wrapping glass fiber non-woven fabric around the cable core, the present utility model can greatly extend its effect of preventing rodent gnawing.
[0020] Furthermore, the metal armor layer further includes a galvanized steel strip. The galvanized steel strip forms a tubular structure along the circumferential direction and is sleeved outside the inner liner layer. The two edges of the galvanized steel strip are connected by welding, and the corrugated structure is sleeved outside the galvanized steel strip.
[0021] The specific technical effects are as follows: By longitudinally wrapping and welding galvanized steel strips, which is different from the traditional longitudinal lap joint method, it is beneficial to improve the protection tightness of the metal armor layer. After welding, the corrugated structure is rolled, which can improve the stability of the overall product structure.
[0022] Furthermore, the thickness H3 of the tubular structure is 0.15 mm to 0.2 mm, and the thread width L2 of the corrugated structure is 1 mm to 2 mm.
[0023] The specific technical effects are as follows: The purpose of designing the corrugated structure with such dimensions is to be consistent with the thread direction of the dense spiral thread structure and have a similar structure, which can provide a more solid internal support structure for the outer sheath and improve the anti-rat performance of the overall cable.
[0024] Furthermore, the inner liner layer is made of flame-retardant plastic tape and mica tape and is wrapped around the outside of several of the power lines.
[0025] The specific technical effects are as follows: The flame-retardant plastic tape is used to fix multiple power lines to ensure the stability of the product structure. The mica tape is used to improve the flame-retardant and fire-resistant capabilities of the cable.
[0026] Furthermore, each power line includes a conductor layer and an insulating layer, and the insulating layer is sleeved outside the conductor layer.
[0027] The specific technical effects are as follows: It is used to improve the high-temperature resistance characteristics of the power line.
[0028] Furthermore, the conductor layer is made of stranded multi-core soft copper wires, the insulating layer is made of cross-linked polyethylene material, and the cross-sectional area of the conductor layer is 0.5 mm 2 ~400 mm 2 。
[0029] The specific technical effects are as follows: The insulating layer is made of cross-linked polyethylene material. On the one hand, it is used to improve the high-temperature resistance ability of the cable. On the other hand, through research, the main characteristics of rodents are that each of the upper and lower jaws has a pair of chisel-shaped incisors without tooth roots and only covered with enamel on the labial surface, and they will continue to grow throughout their lives. Therefore, rodents need to constantly gnaw on hard objects to grind them short. The enamel hardness of rodents is about 400 HV to 350 HV, which is greater than the hardness of the stainless steel or aluminum materials of the conventional cable metal armor. The dentin hardness is 50 HV to 100 HV. The Vickers hardness of the cross-linked polyethylene used in the present invention is 90 HV to 120 HV. Although it is less than the enamel hardness, it is greater than the dentin hardness, which can, to a certain extent, reduce the gnawing of rodents. Generally speaking, it has stronger protection ability; the cross-sectional area of the conductor layer is 0.5 mm 2 ~400 mm 2 is used to improve the bending performance of the cable.
[0030] Further, a plurality of the power lines are arranged in parallel or stranded within the inner liner layer.
[0031] The beneficial effects of the present utility model are as follows:
[0032] The power line, the inner liner layer, the metal armor layer and the outer sheath are sleeved in sequence from inside to outside, with good bending performance and good overall stability of the cable. By designing the outer sheath as a spiral-shaped dense spiral pattern structure, both the outer diameter of the cable is increased and the weight of the cable is reduced as much as possible. When the outer diameter size of the cable is larger than the maximum opening width of rodents, it can effectively avoid being bitten by small rodents with great destructiveness, save materials, reduce costs, improve the bending performance of the cable, and facilitate the laying of the cable.
[0033] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings
[0034] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0035] Figure 1 It is a schematic axial cross-sectional structure diagram of the present utility model;
[0036] Figure 2 It is a schematic radial cross-sectional structure diagram of the present utility model.
[0037] In the figure:
[0038] 1. Power line; 10. Insulation layer; 11. Conductor layer;
[0039] 2. Inner liner layer;
[0040] 3. Metal armor layer; 31. Corrugated structure; 32. Galvanized steel strip;
[0041] 4. Outer sheath; 41. Dense spiral pattern structure; 42. Inner ring structure. Specific Embodiments
[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.
[0043] Embodiment:
[0044] As Figures 1 to 2 shown, there are several power cables 1, an inner lining layer 2, a metal armor layer 3, and an outer sheath 4. The several power cables 1 are all arranged inside the inner lining layer 2, and the inner lining layer 2, the metal armor layer 3, and the outer sheath 4 are sleeved in sequence from inside to outside;
[0045] The metal armor layer 3 includes a helical corrugated structure 31, and the outer sheath 4 includes a helical dense spiral thread structure 41. The thread helix direction of the corrugated structure 31 is the same as that of the dense spiral thread structure 41.
[0046] It should be noted here that: the power cables 1, the inner lining layer 2, the metal armor layer 3, and the outer sheath 4 are sleeved in sequence from inside to outside, with good bending performance and good overall stability of the cable. By designing the outer sheath 4 as a helical dense spiral thread structure 41, both the outer diameter of the cable is increased and the weight of the cable is reduced as much as possible. When the outer diameter size of the cable is larger than the maximum opening width of rodents, it can effectively avoid being bitten by rodents, save materials, reduce costs, improve the bending performance of the cable, and facilitate the laying of the cable.
[0047] The outer sheath 4 further includes an inner ring structure 42. The inner ring structure 42 is sleeved outside the corrugated structure 31, and the dense spiral thread structure 41 is sleeved outside the inner ring structure 42.
[0048] It should be noted here that: by the inner ring structure 42 and the dense spiral thread structure 41, the outer diameter of the cable is increased, so that the outer diameter of the cable is larger than the opening height of rodents, making them give up biting.
[0049] The thread width L1 of the dense spiral thread structure 41 is 2 mm to 3 mm, the thread depth H1 of the dense spiral thread structure 41 > 10 mm, and the thickness H2 of the inner ring structure 42 is 1.8 mm to 2 mm.
[0050] It should be noted here that the purpose of adopting such a size design is to reduce the stress surface and stress angle during rodent gnawing. Research shows that when rodents gnaw on hard objects, a single gnawing action by the rodents is not sufficient to separate the object, and it is necessary to repeat the action multiple times with the upper and lower incisors not closed. Looking from the side, the lower incisors seem to "cut" the object in the direction of the upper incisors. Exactly speaking, the actual action of the lower incisors is to repeatedly "chisel" the object. The "chiseling" of the incisors is changed from the basic gnawing action. First, the mandible moves downward, and then drives the lower incisors forward and upward so that the edge of the incisors acts on the object. This action will be repeated until the object is broken and separated. The front paws and the upper incisors play the role of "clamping" - tightly grasping the object to counteract the "chiseling" of the lower incisors. And the width of the front teeth of common rodents is 1mm - 2mm, the normal length of the front teeth is 4mm below the gum, and the lower front teeth are 7mm. Therefore, when setting the thread width, consider the width of the front teeth of common rodents in the laying environment, take a value less than the width of its two front teeth, and the thread depth is greater than the length of its front teeth. In this way, the stress surface during rodent gnawing can be minimized to the greatest extent, and it is not conducive to fixing the position of the lower incisors and the front paws.
[0051] The outer sheath 4 is made of cross-linked polyvinyl chloride containing glass fiber, where the mass ratio of glass fiber is 25% - 40%, and the Vickers hardness of the outer sheath 4 is greater than 90HV.
[0052] It should be noted here that the outer sheath 4 is made of cross-linked polyvinyl chloride material to improve the high-temperature resistance characteristics of the cable. The cross-linked polyvinyl chloride reinforced with glass fiber has a material hardness similar to that of nylon, which can effectively reduce the gnawing of rodents. Compared with the commonly used anti-rat nylon sheath, the material used in the present utility model has a lower cost, which is conducive to the popularization and application of the product; at the same time, due to the presence of glass fiber in the polyvinyl chloride material, when the outer sheath 4 is gnawed by a mouse, the mixed glass fiber in the middle will be exposed. Since the glass fiber is extremely sharp, during the gnawing process of the rodents, the glass fiber will stab its mouth, making the rodents have a sense of fear of the cable, and using the physical stinging sensation to achieve the effect of preventing rat bites; compared with wrapping glass fiber non-woven fabric around the cable core, the present utility model can greatly extend its effect of preventing rodent gnawing.
[0053] Compared with the traditional annular pattern structure, the dense spiral pattern structure 41 is to ensure the continuity of the protruding sheath. In this way, as long as the rodents gnaw and damage the outer surface of the outer sheath 4, there will always be glass fiber in the outer sheath 4 remaining in a protruding state, interfering with the subsequent gnawing actions of the rodents, thereby effectively protecting the cable.
[0054] The metal armor layer 3 further includes a galvanized steel strip 32. The galvanized steel strip 32 forms a tubular structure along the circumference and is sleeved outside the inner liner 2. The two edges of the galvanized steel strip 32 are connected by welding, and the corrugated structure 31 is sleeved outside the galvanized steel strip 32.
[0055] It should be noted here that: The galvanized steel strip is longitudinally wrapped and welded, which is different from the traditional longitudinal lap joint method, and is beneficial to improving the protection tightness of the metal armor layer 3. After welding, the corrugated structure 31 is rolled, which can improve the stability of the overall product structure.
[0056] The thickness H3 of the tubular structure is 0.15 mm to 0.2 mm, and the thread width L2 of the corrugated structure 31 is 1 mm to 2 mm.
[0057] It should be noted here that: The purpose of the corrugated structure 31 adopting this size design is to be consistent with the thread direction of the dense spiral thread structure 41 and have a similar structure, which can provide a more solid internal support structure for the outer sheath 4 and improve the anti-rat performance of the overall cable.
[0058] The inner liner layer 2 is made of a flame-retardant plastic tape and mica tape and is wrapped around the outside of a number of power lines 1.
[0059] It should be noted here that: The flame-retardant plastic tape is used to fix multiple power lines 1 to ensure the stability of the product structure. The mica tape is used to improve the flame-retardant and fire-resistant ability of the cable.
[0060] Each power line 1 includes a conductor layer 11 and an insulating layer 10, and the insulating layer 10 is sleeved outside the conductor layer 11.
[0061] It should be noted here that: It is used to improve the high-temperature resistance characteristics of the power line 1.
[0062] The conductor layer 11 is made of stranded multi-core soft copper wires, the insulating layer 10 is made of cross-linked polyvinyl chloride material, and the cross-sectional area of the conductor layer 11 is 0.5 mm 2 ~400 mm 2 .
[0063] It should be noted here that: The insulating layer 10 is made of cross-linked polyvinyl chloride material. On the one hand, it is used to improve the high-temperature resistance ability of the cable. On the other hand, through research, the main characteristics of rodents are that each of the upper and lower jaws has a pair of chisel-shaped incisors without tooth roots and only enamel-coated on the labial surface, and will continue to grow throughout life. Therefore, rodents need to continuously gnaw on hard objects to grind them short. The enamel hardness of rodents is about 400 HV to 350 HV, which is greater than the hardness of stainless steel or aluminum used in conventional cable metal armor. The dentin hardness is 50 HV to 100 HV. The Vickers hardness of the cross-linked polyvinyl chloride used in the present invention is 90 HV to 120 HV. Although it is less than the enamel hardness, it is greater than the dentin hardness, which can, to a certain extent, reduce the gnawing of rodents. Generally speaking, it has stronger protection ability; the conductor layer 11 is made of stranded multi-core soft copper wires and is used to improve the bending performance of the cable.
[0064] A plurality of power lines 1 are arranged in parallel or stranded within the inner liner 2.
[0065] In summary, the beneficial effects of the present utility model are as follows:
[0066] The power line 1, the inner liner 2, the metal armor layer 3, and the outer sheath 4 are sleeved in sequence from the inside out. It has good bending performance and good overall stability of the cable. By designing the outer sheath 4 as a spiral-shaped dense spiral pattern structure 41, it not only increases the outer diameter of the cable but also minimizes the cable weight as much as possible. When the outer diameter size of the cable is larger than the maximum opening width of rodents, it can effectively prevent being bitten by small rodents with great destructiveness, save materials, reduce costs, improve the bending performance of the cable, and facilitate the laying of the cable.
[0067] Each device selected in this application is a general standard part or a component known to those skilled in the art. Its structure and principle can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.
[0068] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0069] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0070] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A rodent-proof wire for outdoor and pipe gallery use, characterized in that: include: A plurality of power lines (1), an inner lining layer (2), a metal armor layer (3) and an outer sheath (4), wherein the plurality of power lines (1) are arranged in the inner lining layer (2), and the inner lining layer (2), the metal armor layer (3) and the outer sheath (4) are sequentially sheathed from the inside to the outside; The metal armor layer (3) comprises a spiral corrugated structure (31), and the outer sheath (4) comprises a spiral dense spiral corrugated structure (41), wherein the thread direction of the corrugated structure (31) is consistent with the thread direction of the dense spiral corrugated structure (41).
2. The rodent-proof wire for outdoor use and pipe gallery as claimed in claim 1, characterized in that: The outer sheath (4) further comprises an inner ring structure (42), wherein the inner ring structure (42) is sleeved on the outside of the ribbed structure (31), and the dense spiral pattern structure (41) is sleeved on the outside of the inner ring structure (42).
3. The rodent-proof wire for outdoor use and pipe gallery as claimed in claim 2, characterized in that: The thread width L1 of the dense spiral structure (41) is 2 mm to 3 mm, the thread depth H1 of the dense spiral structure (41) is greater than 10 mm, and the thickness H2 of the inner ring structure (42) is 1.8 mm to 2 mm.
4. The rodent-proof wire for outdoor and pipe gallery use as claimed in claim 1, characterized in that: The Vickers hardness of the outer sheath (4) is greater than 90 HV.
5. The rodent-proof wire for outdoor use and pipe gallery as claimed in claim 1, characterized in that: The metal armor layer (3) also includes a galvanized steel strip (32), which forms a tubular structure along the circumferential direction and is sleeved on the outside of the inner lining layer (2), the two edges of the galvanized steel strip (32) are connected by welding, and the ribbed structure (31) is sleeved on the outside of the galvanized steel strip (32).
6. The rodent-proof wire for outdoor use and pipe gallery as claimed in claim 5, characterized in that: The thickness H3 of the tubular structure is 0.15 mm to 0.2 mm, and the thread width L2 of the corrugated structure (31) is 1 mm to 2 mm.
7. The rodent-proof wire for outdoor use and pipe gallery as claimed in claim 1, characterized in that: The inner lining layer (2) is made of flame-retardant plastic tape and mica tape and is wrapped around the outside of the plurality of power cords (1).
8. The rodent-proof wire for outdoor use and pipe gallery as claimed in claim 1, characterized in that: Each of the power lines (1) comprises a conductor layer (11) and an insulating layer (10), wherein the insulating layer (10) is sleeved on the outside of the conductor layer (11).
9. The rodent-proof wire for outdoor use and pipe gallery use as claimed in claim 8, characterized in that: The conductor layer (11) is made of twisted multi-core soft copper wires, the insulating layer (10) is made of cross-linked polyvinyl chloride material, and the cross-sectional area of the conductor layer (11) is 0.5 mm 2 ~400mm 2 .
10. The rodent-proof wire for outdoor use and pipe gallery as claimed in claim 1, characterized in that: A plurality of power lines (1) are arranged in parallel or twisted in the inner lining layer (2).