Single-phase power cable for electrified railway and production equipment

Abstract

The utility model relates to the technical field of power cables, and discloses an electrified railway single-phase power cable, which comprises a main body mechanism, the main body mechanism comprises a single-phase power cable body, an oxygen-free copper compression conductor, a semi-conductive conductor shield and a crosslinked polyethylene insulator, and the oxygen-free copper compression conductor is fixedly arranged inside the single-phase power cable body. According to the electrified railway single-phase power cable and the production equipment, through the arrangement of installing the oxygen-free copper compression conductor, when the single-phase power cable is used, the conductor structure is wrapped with the semi-conductive water-blocking wrapping tape, so that the single-phase power cable body has relatively excellent water-blocking performance; according to the single-phase power cable, moisture permeation of the power cable in the working process of railway electrification is avoided, and the weather resistance and the structural strength of the single-phase power cable body are greatly improved in cooperation with the design of the flame-retardant wrapping tape and the aluminum wire armor, so that the structural stability of the single-phase power cable body is improved, and the service life of the single-phase power cable body is prolonged. Therefore, the service life of the single-phase power cable body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to an electrified railway single-phase power cable and production equipment. Background Art

[0002] Electrified railway cables are generally used as power supply lines between traction substations and grid-connected points or as positive feeder lines in AT power supply methods. They are important equipment for directly supplying power to the contact network.

[0003] The existing patent document with technical disclosure number CN209607502U provides a smart energy railway power cable. The metal shielding wire and the inner sheath extruded outside the utility model jointly provide protection for the monitoring unit, which not only enhances the structural strength and shielding performance of the cable, but also prevents the monitoring unit from being damaged, and better provides power, signals, and cable real-time operation information for signals, communications and other railway comprehensive power equipment along the railway. At the same time, the cable has a small outer diameter, high structural strength, is easy to lay, and has a long service life.

[0004] However, the existing railway power cables have poor water-blocking performance when in use. Most of the electrified railway cables are laid in cable trenches in substations, and most of the cables are directly buried between the field and the access points. In areas with heavy rain, the cables may be frequently immersed in water. During the long-term use of the cables, it is not easy to avoid moisture penetration, which directly affects the safety and service life of the electrified railway cables. Utility Model Content

[0005] Technical problem to be solved: The purpose of the utility model is to provide an electrified railway single-phase power cable and production equipment to solve the problem of poor water blocking performance of existing railway power cables when in use as mentioned in the above background technology.

[0006] Technical solution: To achieve the above-mentioned purpose, the utility model provides the following technical solution: an electrified railway single-phase power cable, comprising a main body, the main body comprising a single-phase power cable body, an oxygen-free copper compressed conductor, a semi-conductive conductor shield and a cross-linked polyethylene insulation, the oxygen-free copper compressed conductor is fixedly arranged inside the single-phase power cable body, the semi-conductive conductor shield is fixedly arranged outside the oxygen-free copper compressed conductor, and the cross-linked polyethylene insulation is fixedly arranged outside the semi-conductive conductor shield;

[0007] The main body structure also includes a semi-conductive insulation shield, a copper wire shield, a flame retardant tape, an isolation sleeve, an aluminum wire armor and an outer sheath. The semi-conductive insulation shield is fixedly arranged inside the single-phase power cable body, and the semi-conductive insulation shield is located on the outside of the cross-linked polyethylene insulation. The copper wire shield is fixedly arranged inside the single-phase power cable body, and the copper wire shield is located on the outside of the semi-conductive insulation shield. The flame retardant tape is fixedly arranged inside the single-phase power cable body, and is located on the outside of the copper wire shield. The isolation sleeve is fixedly arranged inside the single-phase power cable body, and the isolation sleeve is located on the outside of the flame retardant tape and the semi-conductive insulation shield. The outer sheath is fixedly arranged on the outside of the single-phase power cable body.

[0008] Preferably, the winding mechanism includes a support seat, a fixed plate, an electric motor and a screw rod, the fixed plate is fixedly mounted on the left and right ends of the upper end of the support seat, the electric motor is fixedly mounted on the right end of the inner end of the fixed plate, and the screw rod is fixedly mounted on the transmission end of the left end of the electric motor.

[0009] Preferably, the winding mechanism also includes a threaded sleeve, a limit rod and a guide sleeve, the threaded sleeve is threadedly connected to the outer end of the screw rod, the limit rod is fixedly installed at the lower end of the threaded sleeve, the limit rod is slidably connected to the support seat, and the guide sleeve is fixedly installed at the upper end of the threaded sleeve.

[0010] Preferably, the winding mechanism also includes a winding motor, a connecting disk and an elastic pull rod, the winding motor is fixedly mounted on the left end of the fixed plate, the connecting disk is fixedly mounted on the transmission end of the right end of the winding motor, the elastic pull rod is movably mounted on the upper end of the connecting disk, and the lower end of the elastic pull rod extends to the interior of the connecting disk.

[0011] Preferably, the winding mechanism further comprises a winding roller and a connecting groove, wherein the winding roller is movably mounted inside the connecting disk, and the connecting groove is fixedly arranged at the upper end of the winding roller.

[0012] Preferably, the winding mechanism further comprises an electric push rod and a pushing rod, wherein the electric push rod is fixedly mounted on the right end of the inner end of the fixed plate, and the pushing rod is fixedly mounted on the transmission end of the left end of the electric push rod.

[0013] Preferably, the winding mechanism further comprises a support disk and a rotating rod, wherein the support disk is fixedly mounted on the left end of the push rod, and the rotating rod is fixedly mounted on the right end of the connecting disk, and the right end of the rotating rod is rotatably connected to the support disk.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The single-phase power cable for electrified railways is provided with an oxygen-free copper compressed conductor, so that when the single-phase power cable is in use, the conductor structure is wrapped with a semi-conductive water-resistant tape, so that the single-phase power cable body has relatively excellent water-blocking performance, and the water penetration of the power cable during the laying operation of the electrified railway is avoided. The design of the flame-retardant tape and the aluminum wire armor greatly improves the weather resistance and structural strength of the single-phase power cable body, thereby improving the structural stability of the single-phase power cable body and extending the service life of the single-phase power cable body;

[0016] 2. The production equipment of the single-phase power cable for electrified railways is equipped with an electric motor and a guide sleeve. When the production equipment is performing the reeling operation of the power cable, the design of the guide sleeve plays a guiding effect on the cable. With the drive of the electric motor, the produced power cable can be evenly reeled, avoiding cable stacking, collapse or staggered knotting during the reeling process, thereby improving the processing quality of the power cable by the production equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the main mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the winding mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the winding roller of the utility model.

[0021] In the figure: 1. Main body; 101. Single-phase power cable body; 102. Oxygen-free copper compressed conductor; 103. Semi-conductive conductor shield; 104. Cross-linked polyethylene insulation; 105. Semi-conductive insulation shield; 106. Copper wire shield; 107. Flame-retardant tape; 108. Isolation sleeve; 109. Aluminum wire armor; 110. Outer sheath; 2. Winding mechanism; 201. Support seat; 202. Fixing plate; 203. Electric motor; 204. Screw rod; 205. Threaded sleeve; 206. Limit rod; 207. Guide sleeve; 208. Winding motor; 209. Connecting plate; 210. Elastic pull rod; 211. Winding roller; 212. Connecting groove; 213. Electric push rod; 214. Push rod; 215. Support plate; 216. Rotating rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 - Figure 4 The utility model provides a technical solution: an electrified railway single-phase power cable, comprising a main body 1, the main body 1 comprising a single-phase power cable body 101, an oxygen-free copper compressed conductor 102, a semi-conductive conductor shield 103 and a cross-linked polyethylene insulation 104, the oxygen-free copper compressed conductor 102 is fixedly arranged inside the single-phase power cable body 101, the semi-conductive conductor shield 103 is fixedly arranged outside the oxygen-free copper compressed conductor 102, and the cross-linked polyethylene insulation 104 is fixedly arranged outside the semi-conductive conductor shield 103;

[0024] The main body 1 also includes a semi-conductive insulation shield 105, a copper wire shield 106, a flame retardant tape 107, an isolation sleeve 108, an aluminum wire armor 109 and an outer sheath 110. The semi-conductive insulation shield 105 is fixedly arranged inside the single-phase power cable body 101, and the semi-conductive insulation shield 105 is located on the outside of the cross-linked polyethylene insulation 104. The copper wire shield 106 is fixedly arranged inside the single-phase power cable body 101, and the copper wire shield 106 is located on the outside of the semi-conductive insulation shield 105. The flame retardant tape 107 is fixedly arranged inside the single-phase power cable body 101 and located on the copper wire shield 106. The outer side of the single-phase power cable body 101 is fixedly provided with an isolation sleeve 108, and the isolation sleeve 108 is located on the outer side of the flame-retardant tape 107 and the semi-conductive insulation shield 105. The outer sheath 110 is fixedly provided on the outer side of the single-phase power cable body 101. In order to enhance the water-blocking performance of the single-phase power cable body 101, the oxygen-free copper compressed conductor 102 is a trapezoidal wire conductor structure. The 400mm conductor structure is composed of 53 (1+6+12+15+19) single wires spliced ​​and twisted. A layer of 0.20mm thick water-blocking tape is wrapped between each layer of conductors. The final outer diameter of the conductor is 22.0m m, the elongation at break of any single wire is not less than 25%; the water-blocking tape is a semi-conductive water-blocking tape with a thickness of 0.3mm, a width of 25mm, and a wrapping overlap rate of 15%; in order to enhance the shielding performance of the single-phase power cable body 101 and reduce the outer diameter of the single-phase power cable body 101, the semi-conductive conductor shield 103 and the semi-conductive insulation shield 105 are formed by extrusion of a semi-conductive polyolefin mixture, the average thickness of the semi-conductive conductor shield 103 is 0.8mm, the average thickness of the semi-conductive insulation shield 105 is 0.7mm, and the copper wire shield 106 uses 69 φ0.80 copper wires with a small pitch ( less than 650mm); in order to enhance the insulation performance of the single-phase power cable body 101, the cross-linked polyethylene insulation 104 is extruded by cross-linked polyethylene material, the insulation eccentricity of the insulation layer is less than 5%, the nominal thickness of the insulation layer is 11.0mm, and the thinnest point thickness is 9.9mm; in order to enhance the structural strength of the single-phase power cable body 101, the aluminum wire armor 109 is armored with 67 2.50 aluminum wires, which has mechanical properties and no hysteresis loss. The outer sheath 110 is a non-metallic sheath made of halogen-free low-smoke sheath material, with a thickness of 3.2, an outer diameter of 67mm, and a light transmittance of 86%.

[0025] The winding mechanism 2 includes a support seat 201, a fixed plate 202, an electric motor 203 and a screw rod 204. The fixed plate 202 is fixedly mounted on the left and right ends of the upper end of the support seat 201, the electric motor 203 is fixedly mounted on the right end of the inner end of the fixed plate 202, and the screw rod 204 is fixedly mounted on the transmission end of the left end of the electric motor 203. The winding mechanism 2 also includes a threaded sleeve 205, a limiting rod 206 and a guide sleeve 207. The threaded sleeve 205 is threadedly connected to the outer end of the screw rod 204, the limiting rod 206 is fixedly mounted on the lower end of the threaded sleeve 205, the limiting rod 206 is slidably connected to the support seat 201, and the guide sleeve 207 is fixedly mounted on the upper end of the threaded sleeve 205. The winding mechanism 2 also includes a winding motor 208, a connecting disk 209 and an elastic pull rod 210. The winding motor 208 is fixedly installed at the left end of the fixed plate 202, the connecting disk 209 is fixedly installed at the transmission end of the right end of the winding motor 208, the elastic pull rod 210 is movably installed at the upper end of the connecting disk 209, and the lower end of the elastic pull rod 210 extends to the inside of the connecting disk 209. The winding mechanism 2 also includes a winding roller 211 and a connecting groove 212. The winding roller 211 is movably installed inside the connecting disk 209, and the connecting groove 212 is fixedly set at the upper end of the winding roller 211. The winding mechanism 2 also includes an electric push rod 213 and a push rod 214. The electric push rod 213 is fixedly installed on the fixed plate 202. The right end of the inner end of the fixed plate 202, the push rod 214 is fixedly mounted on the transmission end of the left end of the electric push rod 213, the winding mechanism 2 also includes a support disk 215 and a rotating rod 216, the support disk 215 is fixedly mounted on the left end of the push rod 214, the rotating rod 216 is fixedly mounted on the right end of the connecting disk 209, and the right end of the rotating rod 216 is rotatably connected to the support disk 215. During the production process of the single-phase power cable body 101, the staff uses the winding structure to wind up the single-phase power cable body 101, passes one end of the single-phase power cable body 101 through the guide sleeve 207 and connects it to the winding roller 211, and the winding motor 208 drives the winding roller 211 to rotate, and the winding roller 2 11 drives the rotating rod 216 and the supporting disk 215 to rotate, and the single-phase power cable body 101 is wound. At the same time, the electric motor 203 drives the threaded sleeve 205 to move on the screw rod 204, and the threaded sleeve 205 drives the limiting rod 206 to slide left and right, thereby driving the guide sleeve 207 to move at a constant speed, so that the cable is evenly wound around the outer end of the winding roller 211. When the winding roller 211 needs to be replaced, the staff pulls the elastic pull rod 210 to separate it from the connecting groove 212, and then starts the electric push rod 213 to separate the connecting disk 209 on the right side from the winding roller 211, and the winding roller 211 that has been wound can be removed for replacement.

[0026] Working principle: In order to enhance the water-blocking performance of the single-phase power cable body 101, the oxygen-free copper compressed conductor 102 is a trapezoidal conductor structure. The 400mm conductor structure is composed of 53 (1+6+12+15+19) single wires spliced ​​and twisted. A layer of 0.20mm thick water-blocking tape is wrapped between each layer of conductor. The final outer diameter of the conductor is 22.0mm. The elongation at break of any single wire is not less than 25%; the water-blocking tape is a semi-conductive water-wrapped tape with a thickness of 0.3mm, a width of 25mm, and a wrapping coverage rate of 15%; In order to enhance the shielding performance of the single-phase power cable body 101 and reduce the single-phase power cable body 1 01 outer diameter, the semi-conductive conductor shield 103 and the semi-conductive insulation shield 105 are formed by extrusion of a semi-conductive polyolefin mixture, the average thickness of the semi-conductive conductor shield 103 is 0.8mm, the average thickness of the semi-conductive insulation shield 105 is 0.7mm, and the copper wire shield 106 uses 69 φ0.80 copper wires, which are wound with a small pitch (less than 650mm); in order to enhance the insulation performance of the single-phase power cable body 101, the cross-linked polyethylene insulation 104 is extruded by a cross-linked polyethylene material, the insulation eccentricity of the insulation layer is less than 5%, the nominal thickness of the insulation layer is 11.0mm, and the thinnest point thickness is 9.9mm; ... The structural strength of the main body 101, the aluminum wire armor 109 is armored with 67 2.50 aluminum wires, has mechanical properties and no hysteresis loss, the outer sheath 110 is a non-metallic sheath, using halogen-free low-smoke sheath material, with a thickness of 3.2, an outer diameter of 67mm, and a light transmittance of 86%; in the production process of the single-phase power cable main body 101, the staff uses the winding structure to wind the single-phase power cable main body 101, passes one end of the single-phase power cable main body 101 through the guide sleeve 207 and connects it to the winding roller 211, the winding motor 208 drives the winding roller 211 to rotate, and the winding roller 211 drives the rotating rod 216 to connect with the support The support plate 215 rotates to reel in the single-phase power cable body 101, and at the same time, the electric motor 203 drives the threaded sleeve 205 to move on the screw rod 204, and the threaded sleeve 205 drives the limit rod 206 to slide left and right, thereby driving the guide sleeve 207 to move at a constant speed, so that the cable is evenly wound around the outer end of the winding roller 211. When the winding roller 211 needs to be replaced, the staff pulls the elastic pull rod 210 to separate it from the connecting groove 212, and then starts the electric push rod 213 to separate the right side connecting plate 209 from the winding roller 211, and the winding roller 211 that has been wound can be removed for replacement.

[0027] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An electrified railway single-phase power cable, comprising a main body (1), characterized in that: The main body (1) comprises a single-phase power cable body (101), an oxygen-free copper compressed conductor (102), a semi-conductive conductor shield (103) and a cross-linked polyethylene insulation (104); the oxygen-free copper compressed conductor (102) is fixedly arranged inside the single-phase power cable body (101), the semi-conductive conductor shield (103) is fixedly arranged outside the oxygen-free copper compressed conductor (102), and the cross-linked polyethylene insulation (104) is fixedly arranged outside the semi-conductive conductor shield (103); The main body (1) further comprises a semi-conductive insulation shield (105), a copper wire shield (106), a flame retardant tape (107), an isolation sleeve (108), an aluminum wire armor (109) and an outer sheath (110); the semi-conductive insulation shield (105) is fixedly arranged inside the single-phase power cable body (101); the semi-conductive insulation shield (105) is located outside the cross-linked polyethylene insulation (104); the copper wire shield (106) is fixedly arranged inside the single-phase power cable body (101); the copper wire armor (109) is fixedly arranged inside the single-phase power cable body (101); The copper wire shield (106) is located on the outside of the semi-conductive insulating shield (105); the flame retardant tape (107) is fixedly arranged inside the single-phase power cable body (101) and is located on the outside of the copper wire shield (106); the isolation sleeve (108) is fixedly arranged inside the single-phase power cable body (101) and is located on the outside of the flame retardant tape (107) and the semi-conductive insulating shield (105); and the outer sheath (110) is fixedly arranged on the outside of the single-phase power cable body (101).

2. A production device for single-phase power cables for electrified railways, comprising a winding mechanism (2), characterized in that: The winding mechanism (2) comprises a support seat (201), a fixing plate (202), an electric motor (203) and a screw rod (204); the fixing plate (202) is fixedly mounted on the left and right ends of the upper end of the support seat (201); the electric motor (203) is fixedly mounted on the right end of the inner end of the fixing plate (202); and the screw rod (204) is fixedly mounted on the transmission end of the left end of the electric motor (203).

3. The production equipment for single-phase power cable for electrified railway according to claim 2, characterized in that: The winding mechanism (2) further comprises a threaded sleeve (205), a limiting rod (206) and a guide sleeve (207); the threaded sleeve (205) is threadedly connected to the outer end of the screw rod (204); the limiting rod (206) is fixedly mounted on the lower end of the threaded sleeve (205); the limiting rod (206) is slidably connected to the support seat (201); and the guide sleeve (207) is fixedly mounted on the upper end of the threaded sleeve (205).

4. The production equipment for single-phase power cable for electrified railway according to claim 3, characterized in that: The winding mechanism (2) further comprises a winding motor (208), a connecting disk (209) and an elastic pull rod (210); the winding motor (208) is fixedly mounted on the left end of the fixed plate (202); the connecting disk (209) is fixedly mounted on the transmission end of the right end of the winding motor (208); the elastic pull rod (210) is movably mounted on the upper end of the connecting disk (209); and the lower end of the elastic pull rod (210) extends into the interior of the connecting disk (209).

5. The production equipment for single-phase power cable for electrified railway according to claim 4, characterized in that: The winding mechanism (2) further comprises a winding roller (211) and a connecting groove (212), wherein the winding roller (211) is movably mounted inside the connecting disk (209), and the connecting groove (212) is fixedly arranged at the upper end of the winding roller (211).

6. The production equipment for single-phase power cable for electrified railway according to claim 5, characterized in that: The winding mechanism (2) further comprises an electric push rod (213) and a push rod (214), wherein the electric push rod (213) is fixedly mounted on the right end of the inner end of the fixed plate (202), and the push rod (214) is fixedly mounted on the transmission end of the left end of the electric push rod (213).

7. The production equipment for single-phase power cable for electrified railway according to claim 6, characterized in that: The winding mechanism (2) further comprises a support disk (215) and a rotating rod (216); the support disk (215) is fixedly mounted on the left end of the push rod (214); the rotating rod (216) is fixedly mounted on the right end of the connecting disk (209); and the right end of the rotating rod (216) is rotatably connected to the support disk (215).

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