Railway digital signal cable

Abstract

The invention discloses a railway digital signal cable, and relates to the technical field of cables, the railway digital signal cable comprises a cable body, and the outer surface of the cable body is provided with a protection assembly. When the protective assembly is used, the protective assembly is dragged to a position where the protective assembly needs to be installed, and then one end of the tightening belt is lifted upwards, so that the clamping column is separated from the elastic hole. When the cable is tightened, the tightening sleeve is pinched to wrap the outer surface of the cable body, then the tightening belt is tightened in the direction of the loop side of the hook-and-loop fastener to be tightly wound on the outer surface of the tightening sleeve, and the tightening belt is pressed to enable the clamping column to penetrate through the elastic hole to fix the tightened tightening belt. When the cable body is installed, the fixing clamp is sleeved on the protective sleeve, so that the protective sleeve is not in direct contact with the cable body, the cable body is protected, the cable body is prevented from being abraded by the clamp, the service life of the cable body is prolonged, and the stability of signal transmission is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a railway digital signal cable. Background Art

[0002] Digital signal cable is a type of cable used to transmit digital signals. Digital signals are discrete signals that represent information through binary codes, such as computer network data, digital audio and video signals, etc. The main function of digital signal cables is to accurately and efficiently transmit these digital signals between different devices, reduce signal attenuation and interference, and ensure signal integrity and reliability. In railway systems, real-time data exchange is an important factor in improving operational efficiency and safety. Digital signal cables can effectively transmit high-speed digital signals, reduce interference and signal attenuation, and ensure accurate information transmission.

[0003] In the prior art, during the installation of railway digital signal cables, the signal cables need to be fixed to telephone poles or bridges by cable clamps. In order to improve the firmness of the fixation, the contact between the clamp and the cable will be relatively close. During long-term use, due to factors such as the effect of wind and vibration caused by passing trains, the cable will move relative to the clamp, causing friction, resulting in wear at the connection between the cable and the clamp, affecting the signal and reducing the stability and accuracy of digital signal transmission.

[0004] Therefore, we propose a railway digital signal cable to solve the problems raised in the above background technology. Summary of the invention

[0005] The object of the present invention is to provide a railway digital signal cable to solve the problem that during the installation of the railway digital signal cable proposed in the above background technology, the signal cable needs to be fixed to a pole or a bridge by a clamp. After long-term use, friction will be generated between the clamp and the cable, causing the cable to be worn, the signal is affected, and the stability and accuracy of digital signal transmission are reduced.

[0006] To achieve the above object, the present invention provides the following technical solution: a railway digital signal cable, comprising a cable body, a protective component is arranged on the outer surface of the cable body, and the protective component is used to protect the connection between the cable body and the fixing fixture; The protective component includes a protective sleeve, and tightening sleeves are fixedly connected to the outer surfaces of both sides of the protective sleeve, and a sponge rubber ring is fixedly connected to the inside of the protective sleeve. Pull-out holes are provided near the top of the outer surfaces of the two tightening sleeves, and tightening holes are provided inside the two tightening sleeves. Tightening belts are movably embedded in the insides of the two tightening holes.

[0007] Preferably, the outer surfaces of the two tightening belts are provided with a plurality of elastic holes, the outer surfaces of the two tightening sleeves are fixedly mounted with two connecting blocks near the pull-out holes, and the tops of the four connecting blocks are fixedly mounted with two clamping columns.

[0008] Preferably, outer surfaces of the four clamping posts are movably embedded in the four elastic holes respectively, and outer surfaces of one side of the two tightening belts are fixedly connected with two Velcro hook surfaces.

[0009] Preferably, outer surfaces of the two tightening sleeves are fixedly connected with Velcro loops near the edges, and the interiors of the two tightening sleeves are fixedly connected with shrinkage bands.

[0010] Preferably, the inner walls of the two shrink bands are fixedly connected with a plurality of rubber nails, and the inner wall of the sponge rubber ring is in contact with the outer surface of the cable body.

[0011] Preferably, the interiors of the two tightening holes are respectively connected to the interiors of the two pulling holes, and one end of the two tightening belts is respectively fixedly connected to one side of the interiors of the two tightening holes.

[0012] Preferably, the cable body comprises three pairs of wire groups, the outer surfaces of the three pairs of wire groups are all provided with first binding wire color marks, and the outer surfaces of the three pairs of wire groups are provided with a plurality of four-wire groups.

[0013] Preferably, the outer surfaces of the plurality of four-wire groups are all provided with a second binding wire color mark, and the outer surfaces of the plurality of four-wire groups are provided with a wrapping layer.

[0014] Preferably, an electromagnetic shielding layer is arranged on the outer surface of the tape layer, a heat insulation layer is arranged on the outer surface of the electromagnetic shielding layer, and an aluminum sheath is arranged on the outer surface of the heat insulation layer.

[0015] Preferably, a cold-resistant layer is arranged on the outer surface of the aluminum sheath, a water-blocking layer is arranged on the outer surface of the cold-resistant layer, a steel belt armor layer is arranged on the outer surface of the water-blocking layer, and an outer sheath is arranged on the outer surface of the steel belt armor layer.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, drag the protective component to the position where it needs to be installed, and then lift one end of the tightening band upwards so that the post is disengaged from the elastic hole. Then pinch the tightening sleeve so that it is wrapped around the outer surface of the cable body, and then tighten the tightening band in the direction of the Velcro surface so that it is tightly wrapped around the outer surface of the tightening sleeve, and press the tightening band so that the post passes through the elastic hole to fix the tightened tightening band. Repeat the above tightening operation, and tighten another tightening sleeve on the outer surface of the cable body to prevent the protective component from sliding later. When installing the cable body, put the fixing clamp on the protective sleeve so that there is no direct contact between the protective sleeve and the cable body, thereby protecting the cable body and avoiding wear of the clamp on the cable body, which is beneficial to increasing the service life of the cable body and improving the stability of signal transmission.

[0017] 2. When the present invention is used, the shrinkage band is squeezed and shrunk when the tightening sleeve is pinched, and is wrapped around the outer surface of the cable body, so that a plurality of rubber nails are in contact with the outer surface of the cable body, increasing the friction between the shrinkage band and the cable body, and improving the tightness of the connection between the tightening sleeve and the cable body. The Velcro hook surface is pasted on the Velcro fur surface to assist in fixing the tightening band, improve the tightening effect of the tightening band, and prevent the extra end of the tightening band from drooping and causing adverse effects. The sponge rubber ring serves as an elastic layer inside the protective sleeve, and can provide effective protection for signal cables of different thicknesses.

[0018] 3. When the present invention is used, the cable body includes multiple pairs of wires and four-wire groups, providing multiple signal transmission channels. The first wire color code and the second wire color code are both in different colors, which can help staff quickly identify different wire groups in the cable, and facilitate installation, maintenance and troubleshooting. The tape layer tightly fixes the pair of wires and the four-wire group together, which is conducive to keeping the internal structure of the cable neat and stable. The electromagnetic shielding layer adopts an aluminum-plastic composite tape, which can effectively shield external electromagnetic interference. The thermal insulation layer adopts aerogel felt to effectively prevent heat transfer. The aluminum sheath provides additional insulation protection. The cold-resistant layer adopts cold-resistant rubber and has excellent cold resistance. The water-blocking layer adopts a metal-plastic composite water-blocking tape to achieve water-blocking function. The steel belt armor layer enhances the cable's compression, tensile and impact resistance. As the outermost layer of the cable, the outer sheath plays a comprehensive protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front perspective view of a railway digital signal cable of the present invention; Figure 2 A test stereogram of a railway digital signal cable according to the present invention; Figure 3 It is a three-dimensional diagram of the structure of a protective component in a railway digital signal cable of the present invention; Figure 4It is a structural cross-sectional expanded stereoscopic diagram of a protective sleeve in a railway digital signal cable of the present invention; Figure 5 It is a cross-sectional and expanded stereoscopic diagram of the structure of a tightening sleeve in a railway digital signal cable of the present invention; Figure 6 It is a cross-sectional and expanded stereoscopic diagram of the structure of a tightening belt in a railway digital signal cable of the present invention; Figure 7 This is a schematic diagram of the structure of a cable body in a railway digital signal cable of the present invention; Figure 8 For the present invention Figure 7 Enlarged stereogram of point A.

[0020] In the figure: 1. Cable body; 101. Wire pair group; 102. First wire tie color code; 103. Four-wire group; 104. Second wire tie color code; 105. Tape layer; 106. Electromagnetic shielding layer; 107. Heat insulation layer; 108. Aluminum sheath; 109. Cold-resistant layer; 110. Water-blocking layer; 111. Steel belt armor layer; 112. Outer sheath; 2. Protection components; 201. Protection sleeve; 202. Tightening sleeve; 203. Pull-out hole; 204. Shrinkage belt; 205. Rubber nail; 206. Sponge rubber ring; 207. Tightening hole; 208. Tightening belt; 209. Elastic hole; 210. Connection block; 211. Clamping column; 212. Velcro hook surface; 213. Velcro fur surface. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1-Figure 8As shown, the present invention provides a technical solution: a railway digital signal cable, comprising a cable body 1, a protective component 2 is arranged on the outer surface of the cable body 1, and the protective component 2 is used to protect the connection between the cable body 1 and the fixing fixture; the protective component 2 comprises a protective sleeve 201, and tightening sleeves 202 are fixedly connected to the outer surfaces of both sides of the protective sleeve 201, and a sponge rubber ring 206 is fixedly connected to the inside of the protective sleeve 201, and the outer surfaces of the two tightening sleeves 202 are provided with pull-out holes 203 near the top, and the insides of the two tightening sleeves 202 are provided with tightening holes 207, and the insides of the two tightening holes 207 are movably embedded with tightening belts 208, The outer surfaces of the two tightening bands 208 are provided with a plurality of elastic holes 209, the outer surfaces of the two tightening sleeves 202 are fixedly installed with two connecting blocks 210 near the pulling holes 203, the tops of the four connecting blocks 210 are fixedly installed with two clamping columns 211, wherein the outer surfaces of the four clamping columns 211 are movably embedded in the four elastic holes 209 respectively, one side outer surface of the two tightening bands 208 is fixedly connected with two Velcro hook surfaces 212, the outer surfaces of the two tightening sleeves 202 are fixedly connected with Velcro fur surfaces 213 near the edges, the interiors of the two tightening sleeves 202 are fixedly connected with contraction bands 204, the inner walls of the two contraction bands 204 are fixedly connected with a plurality of rubber nails 205, the inner wall of the sponge rubber ring 206 is in contact with the outer surface of the cable body 1, the interiors of the two tightening holes 207 are respectively connected with the interiors of the two pulling holes 203, and one end of the two tightening bands 208 is respectively fixedly connected with one side of the interiors of the two tightening holes 207.

[0023] In this embodiment, when in use, the structure of the tightening sleeve 202 is as follows: Figure 1As shown, the opening is larger and the connection with the protective sleeve 201 is smaller, so it is convenient to insert the cable body 1 into the protective sleeve 201 from the larger opening of the tightening sleeve 202. After one end of the cable body 1 is inserted through the tightening sleeve 202 and the shrinking band 204, it enters the sponge rubber ring 206, and then passes through the other tightening sleeve 202 and the shrinking band 204, so that the protective component 2 is sleeved on the outer surface of the cable body 1. According to the required installation position, the protective component 2 is dragged to a suitable position, and then the end of the tightening band 208 connected to the Velcro hook surface 212 is lifted up, so that the clamping column 211 located at the rear position is separated from the corresponding elastic hole 209, and at this time, one end of the tightening band 208 loses the limit. Then, pinch the tightening sleeve 202 to wrap it around the outer surface of the cable body 1. At the same time, the shrink band 204 is squeezed and shrunk, wrapping around the outer surface of the cable body 1, so that multiple rubber nails 205 are in contact with the outer surface of the cable body 1. Under the action of the rubber nails 205, the friction between the shrink band 204 and the cable body 1 is increased, thereby improving the tightness of the connection between the tightening sleeve 202 and the cable body 1. After the tightening sleeve 202 is tightly bound to the outer surface of the cable body 1, the tightening belt 208 is pulled out of the tightening hole 207, and then the tightening belt 208 is tightened in the direction of the Velcro fur surface 213 so that it is tightly wrapped around the outer surface of the tightening sleeve 202, and the tightening belt 208 is pressed so that the clamping column 211 located in the front position passes through the elastic hole 209 at the corresponding position, thereby fixing the tightened tightening belt 208, and then the Velcro hook surface 212 is pasted on the Velcro fur surface 213 to assist in fixing the tightening belt 208, improve the tightening effect of the tightening belt 208, and prevent the extra end of the tightening belt 208 from hanging down and causing adverse effects. Repeat the above tightening operation, tighten another tightening sleeve 202 on the outer surface of the cable body 1, thereby fixing the protective component 2 at the connection between the cable body 1 and the fixing clamp, and preventing the protective component 2 from sliding later, which affects the protective effect of the connection between the cable body 1 and the clamp. When installing the cable body 1, the fixing clamp is put on the protective sleeve 201 so that there is no direct contact between the protective sleeve 201 and the cable body 1, thereby protecting the cable body 1 and preventing the clamp from causing wear to the cable body 1, which is beneficial to increasing the service life of the cable body 1 and improving the stability of signal transmission. It solves the problem that during the installation of railway digital signal cables, the signal cable needs to be fixed to a pole or a bridge by a clamp. After long-term use, friction will occur between the clamp and the cable, causing the cable to be worn, the signal is affected, and the stability and accuracy of digital signal transmission are reduced.The sponge rubber ring 206 serves as an elastic layer inside the protective sleeve 201. There are a large number of tiny pores inside the sponge rubber ring 206, which has very good elasticity and compressibility. When it is put on a thinner cable, the sponge rubber ring 206 can fit tightly to the cable surface under the action of its own elasticity; when it is put on a thicker cable, the sponge rubber ring 206 can be compressed and can also have good contact with the cable surface, thereby providing effective protection for signal cables of different thicknesses.

[0024] Embodiment 2: Figure 7-Figure 8 As shown, the cable body 1 includes three pairs of wire groups 101, and the outer surfaces of the three pairs of wire groups 101 are all provided with a first wire binding color code 102, the outer surfaces of the three pairs of wire groups 101 are provided with a plurality of four-wire groups 103, the outer surfaces of the plurality of four-wire groups 103 are all provided with a second wire binding color code 104, the outer surfaces of the plurality of four-wire groups 103 are provided with a tape layer 105, the outer surface of the tape layer 105 is provided with an electromagnetic shielding layer 106, the outer surface of the electromagnetic shielding layer 106 is provided with a heat insulation layer 107, the outer surface of the heat insulation layer 107 is provided with an aluminum sheath 108, the outer surface of the aluminum sheath 108 is provided with a cold-resistant layer 109, the outer surface of the cold-resistant layer 109 is provided with a water-blocking layer 110, the outer surface of the water-blocking layer 110 is provided with a steel belt armor layer 111, and the outer surface of the steel belt armor layer 111 is provided with an outer sheath 112.

[0025] In this embodiment, when in use, the cable body 1 contains multiple pairs of wire groups 101 and four-wire groups 103, providing multiple signal transmission channels. When one of the groups fails, the other groups may still work normally, thereby ensuring that the basic functions of the railway signal system are not affected and improving the reliability and fault tolerance of the entire system. It is also possible to transmit multiple different types of digital signals at the same time to meet the complex and diverse signal transmission requirements of the railway system. The first wire color mark 102 and the second wire color mark 104 on the outer surface of the pair of wire groups 101 and the four-wire group 103 are both in different colors, which can help staff quickly identify different wire groups in the cable, and facilitate installation, maintenance and troubleshooting. Through color coding, technicians can clearly determine the function or purpose of each group of wires, which can improve the safety and convenience of operation. The tape layer 105 tightly fixes the multiple pairs of wire groups 101 and the multiple four-wire groups 103 together to prevent them from shifting or loosening when the cable is bent, stretched or vibrated, and keep the internal structure of the cable neat and stable. The electromagnetic shielding layer 106 is made of aluminum-plastic composite tape, which can effectively shield external electromagnetic interference and prevent external electromagnetic signals from interfering with the internal signal transmission of the cable. At the same time, it can also prevent the internal signal of the cable from radiating outward, reduce electromagnetic interference to other devices, and ensure the purity and accuracy of signal transmission. The thermal insulation layer 107 is made of aerogel felt. Aerogel is a material with a nanoporous structure, which is filled with a large amount of air. The low thermal conductivity of air makes the aerogel felt have an extremely low thermal conductivity coefficient. It can effectively prevent the transfer of heat, significantly reduce the temperature inside the cable in a high temperature environment, and protect the performance of the cable. The aluminum sheath 108 provides additional insulation protection, enhances the overall insulation performance of the cable, ensures the safety of the signal transmission process, and prevents problems such as signal leakage or short circuit caused by insulation damage. The cold-resistant layer 109 is made of cold-resistant rubber, which has excellent cold-resistant performance. The silicone rubber molecular chain is relatively soft and can still maintain good flexibility in a low temperature environment. It will not become hard and brittle like ordinary rubber. It can still work normally at low temperatures, effectively protecting the internal structure of the cable from damage by low temperatures. The water-blocking layer 110 is a metal-plastic composite water-blocking tape, which uses the barrier properties of the metal foil and the flexibility of the plastic film, as well as the water-absorbing properties of the water-absorbing powder to achieve the water-blocking function. The steel belt armor layer 111 is mainly used to enhance the cable's compression, tensile and impact resistance, and prevent the cable from being damaged under external pressure, stretching and impact. The outer sheath 112, as the outermost layer of the cable, plays a comprehensive protective role. It can resist damage to the cable from ultraviolet radiation, chemical corrosion, and bad weather, and at the same time prevent the armor layer from rusting and corrosion, thereby extending the service life of the cable.

[0026] The effect and working principle of the whole mechanism are as follows: after one end of the cable body 1 is inserted through the tightening sleeve 202 and the shrinking band 204, it enters the inside of the sponge rubber ring 206, and then passes through another tightening sleeve 202 and the shrinking band 204, so that the protective component 2 is sleeved on the outer surface of the cable body 1. According to the required installation position, the protective component 2 is dragged to a suitable position, and then the end of the tightening band 208 connected to the Velcro hook surface 212 is lifted upward, so that the clamping column 211 located at the rear position is separated from the corresponding elastic hole 209. Then, the tightening sleeve 202 is pinched to wrap around the outer surface of the cable body 1, and the shrinking band 204 is squeezed and shrunk, and wrapped around the outer surface of the cable body 1, so that multiple rubber nails 205 are in contact with the outer surface of the cable body 1. Under the action of the rubber nails 205, the friction between the shrinking band 204 and the cable body 1 is increased, and the tightness of the connection between the tightening sleeve 202 and the cable body 1 is improved. After the tightening sleeve 202 is tightly bound to the outer surface of the cable body 1, the tightening belt 208 is tightened in the direction of the Velcro fur surface 213 so that it is tightly wrapped around the outer surface of the tightening sleeve 202, and the tightening belt 208 is pressed so that the clamping column 211 located in the front position passes through the elastic hole 209 at the corresponding position, thereby fixing the tightened tightening belt 208, and then the Velcro hook surface 212 is pasted on the Velcro fur surface 213 to assist in fixing the tightening belt 208, improve the tightening effect of the tightening belt 208, and prevent the extra end of the tightening belt 208 from hanging down and causing adverse effects. Repeat the above tightening operation, tighten another tightening sleeve 202 on the outer surface of the cable body 1, thereby fixing the protective component 2 at the connection between the cable body 1 and the fixing clamp, and preventing the protective component 2 from sliding later, which affects the protective effect of the connection between the cable body 1 and the clamp. When installing the cable body 1, the fixing clamp is put on the protective sleeve 201 so that there is no direct contact between the protective sleeve 201 and the cable body 1, thereby protecting the cable body 1 and preventing the clamp from causing wear on the cable body 1, which is beneficial to improving the service life of the cable body 1. The sponge rubber ring 206 is an elastic layer inside the protective sleeve 201. There are a large number of tiny pores inside the sponge rubber ring 206, which has very good elasticity and compressibility, and can provide effective protection for signal cables of different thicknesses. The cable body 1 contains multiple pairs of wire groups 101 and four-wire groups 103, providing multiple signal transmission channels, and can also transmit multiple different types of digital signals at the same time. The first wire color mark 102 and the second wire color mark 104 are both in different colors, which can help staff quickly identify different wire groups in the cable, and facilitate installation, maintenance and troubleshooting. The tape layer 105 tightly fixes the multiple pairs of wire groups 101 and the multiple four-wire groups 103 together to prevent them from shifting or loosening when the cable is bent, stretched or vibrated, and keep the internal structure of the cable neat and stable.The electromagnetic shielding layer 106 adopts an aluminum-plastic composite tape, which can effectively shield external electromagnetic interference and prevent external electromagnetic signals from interfering with the internal signal transmission of the cable. The thermal insulation layer 107 adopts aerogel felt to effectively prevent the transfer of heat and protect the performance of the cable. The aluminum sheath 108 provides additional insulation protection and enhances the overall insulation performance of the cable. The cold-resistant layer 109 adopts cold-resistant rubber, which has excellent cold-resistant performance and can still work normally at low temperatures, effectively protecting the internal structure of the cable from damage by low temperatures. The water-blocking layer 110 adopts a metal-plastic composite water-blocking tape, which utilizes the barrier properties of the metal foil and the flexibility of the plastic film, as well as the water-absorbing properties of the water-absorbing powder to achieve the water-blocking function. The steel belt armor layer 111 is mainly to enhance the cable's compression, tensile and impact resistance, and prevent the cable from being damaged under external heavy pressure, stretching and impact. The outer sheath 112, as the outermost layer of the cable, plays a comprehensive protective role.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A railway digital signal cable, comprising a cable body (1), characterized in that: A protective component (2) is provided on the outer surface of the cable body (1), and the protective component (2) is used to protect the connection between the cable body (1) and the fixing fixture; The protective assembly (2) comprises a protective sleeve (201), the outer surfaces of both sides of the protective sleeve (201) are fixedly connected to tightening sleeves (202), the interior of the protective sleeve (201) is fixedly connected to a sponge rubber ring (206), the outer surfaces of the two tightening sleeves (202) are provided with pull-out holes (203) near the top, the interiors of the two tightening sleeves (202) are provided with tightening holes (207), and the interiors of the two tightening holes (207) are movably embedded with tightening belts (208).

2. The railway digital signal cable according to claim 1, characterized in that: The outer surfaces of the two tightening belts (208) are each provided with a plurality of elastic holes (209); the outer surfaces of the two tightening sleeves (202) are each fixedly mounted with two connecting blocks (210) near the pull-out holes (203); and the tops of the four connecting blocks (210) are each fixedly mounted with two clamping columns (211).

3. The railway digital signal cable according to claim 2, characterized in that: The outer surfaces of the four clamping columns (211) are movably embedded in the four elastic holes (209) respectively, and the outer surfaces of one side of the two tightening belts (208) are fixedly connected to two Velcro hook surfaces (212).

4. The railway digital signal cable according to claim 3, characterized in that: The outer surfaces of the two tightening sleeves (202) are fixedly connected to a Velcro surface (213) near the edge, and the interiors of the two tightening sleeves (202) are fixedly connected to a contraction belt (204).

5. The railway digital signal cable according to claim 4, characterized in that: The inner walls of the two shrink bands (204) are fixedly connected with a plurality of rubber nails (205), and the inner wall of the sponge rubber ring (206) is in contact with the outer surface of the cable body (1).

6. The railway digital signal cable according to claim 5, characterized in that: The interiors of the two tightening holes (207) are respectively connected to the interiors of the two pulling holes (203), and one end of the two tightening belts (208) is respectively fixedly connected to one side of the interiors of the two tightening holes (207).

7. The railway digital signal cable according to claim 1, characterized in that: The cable body (1) comprises three wire pairs (101), the outer surfaces of the three wire pairs (101) are all provided with first wire binding color marks (102), and the outer surfaces of the three wire pairs (101) are provided with a plurality of four-wire groups (103).

8. The railway digital signal cable according to claim 7, characterized in that: The outer surfaces of the plurality of four-wire groups (103) are all provided with a second wire binding color mark (104), and the outer surfaces of the plurality of four-wire groups (103) are provided with a wrapping layer (105).

9. The railway digital signal cable according to claim 8, characterized in that: An electromagnetic shielding layer (106) is arranged on the outer surface of the tape layer (105), a heat insulation layer (107) is arranged on the outer surface of the electromagnetic shielding layer (106), and an aluminum sheath (108) is arranged on the outer surface of the heat insulation layer (107).

10. The railway digital signal cable according to claim 9, characterized in that: The outer surface of the aluminum sheath (108) is provided with a cold-resistant layer (109), the outer surface of the cold-resistant layer (109) is provided with a water-blocking layer (110), the outer surface of the water-blocking layer (110) is provided with a steel belt armor layer (111), and the outer surface of the steel belt armor layer (111) is provided with an outer sheath (112).

Images