A railway weak-current cable protection structure with anti-magnetic interference

Abstract

A railway weak-current cable protection structure with anti-magnetic interference comprises a pipe, a cable trench is formed in the pipe, and a signal cable is placed in the cable trench; the pipe is arranged alternately by a first segment and a second segment and connected end to end; the first segment is a shielding pipe made of shielding material, and the second segment is an elastic pipe; the first segment comprises a pipe body, the inner wall of the pipe body is provided with a slide groove distributed along the circumference of the pipe body, and the two ends of the slide groove are respectively provided with a first limit end and a second limit end, and a sliding seat is slidably arranged in the slide groove; a support rod is rotatably mounted on the sliding seat, and the support rod and the sliding seat are driven by a traction device; when the sliding seat slides to the first limit end, the support rod flips outward, and the signal cable is supported by the support rod and located at the upper part of the cable trench; when the sliding seat slides to the lower part of the pipe, the support rod is retracted into the slide groove and the upper end is limited by the second limit end; the signal cable falls into the lower part of the cable trench. The railway weak-current cable protection structure with anti-magnetic interference provided by the present invention can improve anti-magnetic interference performance, and at the same time, it can reduce contact with underground water, thereby protecting the signal cable and slowing down aging.

Description

Technical Field

[0001] The invention relates to a cable protection structure, in particular to a railway weak-current cable protection structure that is resistant to magnetic interference. Background Art

[0002] In railway transportation, power cables and signal cables are laid parallel to each other. A large current flows through the power cables to supply non-traction loads along the line, while traction current also flows through the rails. In a few railway projects, due to route limitations, the State Grid's high-voltage power cables are also laid parallel to the rails. Parallel to the rails are signal cables for transmitting information, which means that signal cables must withstand magnetic interference caused by various currents. For example, when the power cables are short-circuited, a magnetic field is generated around them. This magnetic field will cause a large induced electromotive force in the signal cables, potentially interfering with the signal system and affecting traffic flow. Therefore, it is necessary to further improve the ability to resist magnetic interference. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a railway weak-current cable protection structure that is resistant to magnetic interference, which can improve the anti-magnetic interference performance, while also reducing contact with underground water to protect signal cables and slow down aging.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A railway weak-current cable protection structure with anti-magnetic interference, comprising a pipeline, a cable trench formed in the pipeline, and a signal cable placed in the cable trench;

[0006] The pipeline is composed of first and second segments arranged alternately and connected end to end; the first segment is a shielding tube made of shielding material, and the second segment is an elastic tube;

[0007] The first segment includes a tube body, the inner wall of which is provided with a slide groove distributed along the circumference of the tube body, and the two ends of the slide groove are respectively provided with a first limit end and a second limit end, and the sliding seat is slidably arranged in the slide groove; a support rod is rotatably mounted on the sliding seat, and the support rod and the sliding seat are driven by a traction device;

[0008] When the support rod slides to the first limit end on the sliding seat, the support rod flips outward, and the signal cable is supported by the support rod and located at the upper part of the cable trench;

[0009] When the sliding seat slides to the lower part of the pipeline, the support rod is retracted into the sliding groove and the upper end is limited by the second limiting end; the signal cable falls into the lower part of the cable trench.

[0010] The signal cable comprises a cable core and an outer sheath as the outermost layer, wherein an armor layer, an inner lining layer, an aluminum sheath, a heat insulation layer and a wrapping tape are sequentially arranged from the outer sheath to the cable core.

[0011] The first segment is made of iron, and the second segment is made of plastic.

[0012] The slide groove includes a bottom surface, a first side surface and a second side surface, and the first side surface and the second side surface are located on opposite sides of the width direction of the slide groove; one end of the first side surface away from the bottom surface extends toward the second side surface to form a first flange, and one end of the first flange away from the first side surface extends toward the bottom surface to form a second flange, and a limiting portion is formed between the first flange, the second flange and the first side surface, and the limiting portion is connected to the sliding groove portion through the connecting groove portion.

[0013] The sliding seat includes a limiting seat with a through hole. A connecting plate is fixed on the side of the limiting seat away from the first pull wire. The connecting plate is rotatably connected to a rotating shaft with a reset spring; a handle is fixed on the rotating shaft.

[0014] The traction device includes a first wire groove and a second wire groove arranged on the upper side of the tube body, the first wire groove and the second wire groove are parallel and arranged along the axis direction of the tube body, one end of the first wire groove is connected with the first limiting end through the first channel, and one end of the second wire groove is connected with the second limiting end through the second channel; the other ends of the first wire groove and the second wire groove are both connected to the outside of the tube body; a first winding wheel and a second winding wheel are correspondingly provided on the outside of the tube body, the first pull wire on the first winding wheel passes through the first wire groove and the first channel in sequence and is connected to the handle; the second pull wire on the second winding wheel passes through the second wire groove, the second channel, the slide groove in sequence and is connected to the sliding seat.

[0015] A rack is slidably provided on the connecting plate, with one end of the rack facing the bottom surface, and a gear meshing with the rack is fixed on the rotating shaft; a slot is radially opened on the bottom surface of the lower side of the tube body, and the rack is inserted into the slot when the reset spring is reset.

[0016] The present invention provides a railway weak-current cable protection structure that is resistant to magnetic interference and has the following technical effects:

[0017] 1) By properly configuring the signal cable and installing an aluminum sheath, the induced electromotive force within the cable core can be reduced, thereby protecting the signal system. The armor layer is used to increase the strength of the signal cable, the inner lining layer is used to increase the stability of the signal cable, and the thermal insulation layer is used to isolate the heat from the cable core.

[0018] 2) By dividing the pipeline into several first sections and several second sections, the first section is an iron pipe and the second section is a plastic pipe. The iron pipe forms a closed structure that can shield the magnetic field, further reducing the induced electromotive force in the signal cable; the second section has good elasticity and is easy to be bent, thereby facilitating the change of the extension direction of the pipeline.

[0019] 3) By providing a C-shaped chute within the pipe body, a sliding seat is slidably positioned within the chute. A repositionable support rod is hinged to the sliding seat, which is driven by a traction device. During normal operation, the signal cable is positioned close to the upper side of the pipe under the action of the support rod. If the second segment is damaged or leakage occurs at the connection between the plastic pipe and the pipe body, accumulated water in the pipe is unlikely to come into contact with the signal cable, effectively slowing down the aging of the signal cable. When the signal cable needs to be replaced, it can be released from the support rod and dropped to the bottom of the cable trench, where it can be pulled out and replaced promptly.

[0020] 4) By using a wire trough or channel to pull and release the two sets of cables, the support rod is pulled outward (outward refers to the side away from the chute) and rotated. Simultaneously, the first winding wheel winds the first cable and causes the sliding seat to move along the chute and toward the first limit end. The second winding wheel winds the second cable and causes the sliding seat to move along the chute and toward the second limit end.

[0021] 5) The chute is provided with a limit portion, allowing the sliding seat to slide stably within the chute without leaving the chute. At the same time, a limit portion is provided between the second flange and the first side surface. The limit portion allows the first and second cables to pass through. When the first cable moves, the second flange prevents it from leaving the limit portion, i.e., from leaving the chute and entering the cable trench. This prevents the first cable from interfering with the cable bundle. Similarly, when the second cable moves, the second cable does not leave the chute and enter the cable trench. This prevents the second cable from interfering with the cable bundle.

[0022] 6) By providing a guide groove on the connecting plate, a slot on the bottom of the slide, and a rack slidingly arranged in the guide groove, a gear meshing with the rack is installed on the rotating shaft. Utilizing the rack and gear and the torsion spring at the support rod's own rotating shaft, the support rod's rotation angle can be locked and unlocked: when the sliding seat slides on the slide groove (between the first limit end and the slot), it is limited and locked at the first limit end; it is unlocked at the slot and the support rod is retracted into the slide groove; when the sliding seat slides between the first limit end and the slot, the support rod and the sliding seat do not rotate relative to each other. This ensures relatively stable support and movement throughout the entire process. This prevents the support rod from hitting the inner wall of the tube body when the rotation angle is too large, resulting in immobility. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples:

[0024] Figure 1 Schematic diagram of the present invention.

[0025] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0026] Figure 3 It is a partial top view of the pipeline in the present invention.

[0027] Figure 4 This is a schematic diagram of the support rod located in the slide groove in the present invention.

[0028] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0029] Figure 6 for Figure 5 Partial cross-sectional view at point C in the middle.

[0030] Figure 7 Schematic diagram of the first winding wheel after rotation in the present invention.

[0031] Figure 8 This is a schematic diagram of the support rod buckled onto the signal cable in the present invention.

[0032] Figure 9 for Figure 8 A partial enlarged view of point D in the middle.

[0033] Figure 10 Schematic diagram of the chute in the present invention.

[0034] Figure 11 Schematic diagram of the sliding seat in the present invention.

[0035] Figure 12 It is a schematic diagram of the cooperation between the slide groove and the sliding seat in the present invention.

[0036] In the figure: contact wire 13, signal cable 16, pipe 17, cable core 161, sheath 162, armor layer 163, lining layer 164, aluminum sheath 165, thermal insulation layer 166, wrapping tape 167, first section 171, second section 172, maintenance port 1711, cover 1712, tube body 1713, support rod 1714, first winding wheel 1715, second winding wheel 1716, slot 1717, slide 1713a, first end 1713b, second end 1713c, sliding seat 1713d, first wire groove 1713e, second wire groove 1713f, first channel 1713g, second channel 1713h, bottom surface 1713k, first side surface 1713m, second side surface 1713n, limiting portion 1713p, sliding groove portion 1713q, connecting groove portion 1713r, first flange 1713s, second flange 1713t, limiting seat 1713u, connecting plate 1713v, rotating shaft 1713w, handle 1713x, through hole 1713y, rack 1713z, gear 1713j, limiting groove 1714a, first pull wire 1715a, second pull wire 1716a. DETAILED DESCRIPTION

[0037] like Figure 1 As shown, a railway weak-current cable protection structure with anti-magnetic interference includes a cable trench set on the ground, the extension direction of the cable trench is consistent with the extension direction of the contact line 13. A signal cable 16 is set in the cable trench.

[0038] like Figure 5 As shown, the signal cable 16 includes a cable core 161 and an outer sheath 162 wrapped around the outside of the cable core 161. From the outer sheath 162 to the cable core 161, an armor layer 163, an inner lining layer 164, an aluminum sheath 165, an insulation layer 166 and a wrapping tape 167 are sequentially arranged.

[0039] The cable trench accommodates signal cables 16, which serve the signal system and transmit operating information about locomotives and other equipment. When the contact wire 13 is operating or short-circuited, a magnetic field surrounds it. This magnetic field induces a large electromotive force in the signal cable 16, which can severely damage the signal system. Therefore, an aluminum sheath 165 is installed outside the cable core 161 to reduce the induced electromotive force within the cable core 161 and protect the signal system. The armor layer 163 increases the strength of the signal cable 16, the inner lining layer 164 enhances its stability, the thermal insulation layer 166 isolates the cable core 161 from heat, and the wrapping tape 167 wraps the cable core 161.

[0040] like Figure 1 、 Figure 3 As shown, a pavement layer is laid on the upper side of the ground. The pavement layer is paved with gravel. A pipe 17 is installed within the pavement layer, and a cable trench is formed inside the pipe 17. The pipe 17 includes a plurality of first segments 171 and a plurality of second segments 172. The first segments 171 and the second segments 172 are arranged at intervals and connected end to end. The first segments 171 are made of iron, and the second segments 172 are made of plastic.

[0041] The gravel pavement facilitates drainage and protects the roadbed. The second segment 172 is highly flexible and easily bendable, thus facilitating changes in the extension direction of the pipe 17. The first segment 171 is constructed of iron and has a circular cross-section, forming a closed structure that shields the magnetic field. The signal cable 16 passes through the closed structure, further reducing the induced electromotive force within the signal cable 16.

[0042] like Figure 3 As shown, a maintenance opening 1711 is provided on the upper side of the first segment 171, and a cover plate 1712 is provided at the maintenance opening 1711. The maintenance opening 1711 facilitates maintenance of the signal cable 16. Furthermore, when threading the signal cable 16, a person can reach into the maintenance opening 1711 and conveniently pull or push the signal cable 16 along the pipe 17.

[0043] like Figure 2-3 As shown, the first segment 171 includes a tube 1713, which is provided with a slide groove 1713a. The slide groove 1713a extends along the inner circumference of the tube 1713 and is C-shaped, opening upward. The two ends of the slide groove 1713a are respectively a first stopper end 1713b and a second stopper end 1713c. A sliding seat 1713d is slidably connected within the slide groove 1713a. In normal operation, the sliding seat 1713d is located at the first stopper end 1713b of the slide groove 1713a.

[0044] like Figure 2-3 As shown, an arc-shaped support rod 1714 is disposed within the tubular body 1713. One end of the support rod 1714 is rotatably connected to a sliding seat 1713d and can be reset by a torsion spring. When reset, the support rod 1714 is located within the sliding groove 1713a. When deployed, the support rod 1714 forms a downwardly facing arc-shaped retaining groove 1714a. The signal cable 16 is disposed on the upper side of the support rod 1714 and is supported by the retaining groove 1714a.

[0045] The support rod 1714 and the sliding seat 1713d can be driven by a traction device.

[0046] When the traction device is driven, when the support rod 1714 slides to the first limit end 1713b on the sliding seat 1713d, the support rod 1714 is turned outward, and the signal cable 16 is supported by the support rod 1714 and is located at the upper part of the cable trench. Figure 2 shown.

[0047] When the traction device is driven, the support rod 1714 is retracted into the slide groove 1713a when the sliding seat 1713d slides to the lower part of the pipe 17; the signal cable 16 falls into the lower part of the cable trench, such as Figure 2 shown.

[0048] like Figure 2 As shown, during normal operation, signal cable 16 is supported by support rods 1714 and positioned close to the upper side of pipe 17. If second segment 172 becomes damaged or leaks occur at the connection between the plastic pipe and the pipe body, accumulated water within pipe 17 is unlikely to come into contact with signal cable 16, effectively slowing down aging of signal cable 16. When signal cable 16 needs to be replaced, it can be released from support rods 1714 and dropped to the bottom of the cable trench, where it can be removed and promptly replaced.

[0049] like Figure 2-3As shown, the traction device here specifically includes a first wire groove 1713e and a second wire groove 1713f provided inside the upper side wall of the tube body 1713, and the extension directions of the first wire groove 1713e and the second wire groove 1713f are both consistent with the axial direction of the tube body 1713. The first wire groove 1713e and the second wire groove 1713f are provided between the first limiting end 1713b and the second limiting end 1713c, and the first wire groove 1713e is provided between the second wire groove 1713f and the first limiting end 1713b.

[0050] like Figure 2-3 As shown, the traction device also includes a first channel 1713g and a second channel 1713h provided on the inner wall of the tube body 1713. The first limiting end 1713b is connected to the first wire groove 1713e via the first channel 1713g, while the second limiting end 1713c is connected to the second wire groove 1713f via the second channel 1713h. The other ends of the first wire groove 1713e and the second wire groove 1713f are connected to the exterior of the tube body 1713.

[0051] like Figure 2-3 As shown, the traction device also includes a first winding wheel 1715 and a second winding wheel 1716 that are rotatably connected to the upper side of the tube body 1713. A first pull wire 1715a is wound around the first winding wheel 1715. The first pull wire 1715a passes through the first wire groove 1713e and the first channel 1713g in sequence before connecting to the support rod 1714. The specific connection point between the first pull wire 1715a and the support rod 1714 is located at one end within the chute 1713a. A second pull wire 1716a is wound around the second winding wheel 1716. The second pull wire 1716a passes through the second wire groove 1713f and the second channel 1713h in sequence before extending along the chute 1713a and connecting to the sliding seat 1713d.

[0052] In the above device, the first winding wheel 1715 is used to wind the first pull wire 1715a and, during the pulling process, pull the support rod 1714 outward (outward refers to the side away from the slide groove 1713a) to rotate. At the same time, the first winding wheel 1715 is also used to wind the first pull wire 1715a and cause the sliding seat 1713d to move along the slide groove 1713a and toward the first limit end 1713b. The second winding wheel 1716 is used to wind the second pull wire 1716a and cause the sliding seat 1713d to move along the slide groove 1713a and toward the second limit end 1713c.

[0053] like Figure 6 、 Figure 10As shown, the slide 1713a includes a bottom surface 1713k, a first side surface 1713m, and a second side surface 1713n. The first side surface 1713m and the second side surface 1713n are arranged on opposite sides of the slide 1713a in the width direction. The first side surface 1713m is arranged on a side close to the first winding wheel 1715 and the second winding wheel 1716. The slide 1713a includes a limit portion 1713p, a sliding groove portion 1713q, and a connecting groove portion 1713r. The limit portion 1713p is connected to the sliding groove portion 1713q through the connecting groove portion 1713r. The chute 1713a has a U-shaped cross-section. A first flange 1713s is fixedly connected to a second side 1713n on a first side 1713m facing away from the bottom 1713k. The first flange 1713s extends toward the bottom 1713k on a side facing away from the first side 1713m to form a second flange 1713t. A stopper 1713p is formed between the first flange 1713s, the second flange 1713t, and the first side 1713m, opening toward the bottom of the chute 1713a. A first pull cord 1715a and a second pull cord 1716a both extend along the stopper 1713p.

[0054] like Figure 5 、 Figure 11-12 As shown, the sliding seat 1713d includes a limiting seat 1713u and a connecting plate 1713v fixedly connected to the limiting seat 1713u on a side away from the first pull wire 1715a. The connecting plate 1713v is rotatably connected to a rotating shaft 1713w, and the rotating shaft 1713w is fixedly connected to a handle 1713x. The limiting seat 1713u is provided with a through hole 1713y, and the first pull wire 1715a is connected to the handle 1713x through the through hole 1713y. The support rod 1714 is fixedly connected to the rotating shaft 1713w.

[0055] See also Figure 6 In the above device, since the cross-section of the chute 1713a is U-shaped, the sliding seat 1713d can slide stably within the chute 1713a without leaving the chute 1713a. At the same time, a limiting portion 1713p is provided between the second flange 1713t and the first side surface 1713m. The limiting portion 1713p allows the first pull wire 1715a and the second pull wire 1716a to pass through. When the first pull wire 1715a moves, the first pull wire 1715a will not leave the limiting portion 1713p under the action of the second flange 1713t, that is, it will not leave the chute 1713a and enter the cable trench, thereby preventing the first pull wire 1715a from affecting the wiring of the signal cable 16. Similarly, when the second pull wire 1716a moves, the second pull wire 1716a will not leave the slide groove 1713a and enter the cable trench, so that the second pull wire 1716a will not affect the bundling of the signal cable 16.

[0056] like Figure 5 As shown, preferably, in order to lock and unlock the rotation angle of the support rod 1714. A guide groove is provided on the connecting plate 1713v, and the guide groove opens at one end toward the bottom surface 1713k. A rack 1713z is slidably provided in the guide groove, and the rack 1713z can only slide back and forth relative to the connecting plate 1713v along the length direction of the rack 1713z. Figure 2 In the state, one end of the rack 1713z abuts against the bottom surface 1713k of the slide groove 1713a, and the other end of the rack 1713z abuts against the end surface of the guide groove. The corresponding rotating shaft 1713w is fixedly connected to a gear 1713j that meshes with the rack 1713z. The lower side of the tube body 1713 is provided with a slot 1717 for cooperating with the rack 1713z, and the slot 1717 is provided on the bottom surface 1713k of the slide groove 1713a. Figure 8 In the engaged state, one end of the rack 1713z can be inserted into the slot 1717 .

[0057] Specifically, if Figure 2 As shown, when sliding seat 1713d is at first limit end 1713b, support rod 1714 extends. One end of rack 1713z now rests on bottom surface 1713k of slide slot 1713a, while the other end rests on the end surface of the guide slot. At this point, support rod 1714 cannot rotate and is locked at its first limit angular position. The torsion spring exerts torque on support rod 1714.

[0058] like Figure 8 As shown, when the second pull wire 1716a pulls the sliding seat 1713d so that the sliding seat 1713d moves to the lower left side of the tube body 1713, the rack 1713z moves to the slot 1717. Under the action of the torsion spring, the rack 1713z is inserted into the slot 1717. When the rack 1713z moves relative to the connecting plate 1713v, the gear 1713j, the rotating shaft 1713w, and the support rod 1714 are linked together, and the support rod 1714 rotates and enters the sliding groove 1713a. Figure 4 and Figure 5 , the support rod 1714 is at the second extreme angle position. At this time, the end of the handle 1713x away from the rotation shaft 1713w gradually tilts upward and tilts toward the side away from the first pull line 1715a.

[0059] Working principle and process:

[0060] 1) If Figure 2As shown, when the signal cable 16 needs to be replaced, the second reel 1716 is rotated, and the second pull wire 1716a pulls the sliding seat 1713d along the slide groove 1713a toward the second limit end 1713c. At the same time, the first pull wire 1715a is slowly released from the first reel 1715. Because the rack 1713z abuts against the bottom surface 1713k of the slide groove 1713a, the gear 1713j cannot rotate counterclockwise, and thus the support rod 1714 cannot return to the slide groove 1713a.

[0061] 2) When the sliding seat 1713d moves to the lower left side of the tube body 1713, the signal cable 16 is separated from the support rod 1714 and falls to the lower part of the cable trench under the action of gravity. Figure 8 At the same time, the rack 1713z is aligned with the slot 1717 on the bottom surface 1713k of the chute 1713a. Under the action of the torsion spring, the gear 1713j rotates counterclockwise, the rack 1713z is inserted into the slot 1717, and the support rod 1714 rotates upward, and the support rod 1714 enters the chute 1713a, thereby Figure 8 The status becomes Figure 4 At this point, the operator can pull out the signal cable 16 from the maintenance port 1711 and then thread a new signal cable 16. Since the sliding seat 1713d and the support rod 1714 are both hidden in the slide groove 1713a, the signal cable 16 is not easily blocked by the sliding seat 1713d and the support rod 1714 when threading the cable.

[0062] 3) After the signal cable 16 is replaced, the first winding wheel 1715 is rotated. When the first pull wire 1715a pulls the handle 1713x, the handle 1713x drives the support rod 1714 and the gear 1713j to rotate through the rotating shaft 1713w. The spring is twisted and deformed, and the gear 1713j drives the rack 1713z away from the slot 1717. The support rod 1714 rotates toward the signal cable 16 and buckles on the upper side of the signal cable 16. Figure 8-9 .

[0063] 4) Continue to rotate the first winding wheel 1715, and the sliding seat 1713d moves along the sliding groove 1713a toward the first limit end 1713b until the sliding seat 1713d moves to the first limit end 1713b, that is, the signal cable 16 is lifted by the support rod 1714. Figure 2 During this process, the support rod 1714 and the sliding seat 1713d do not rotate relative to each other, and the second pull line 1716a is released from the second winding wheel 1716. Figure 7 Finally, the new signal cable 16 is re-raised by the support rod 1714 .

[0064] By the above arrangement, the signal cable 16 can be raised by rotating the first winding wheel 1715, which is easy to operate. The signal cable 16 can be lowered by rotating the second winding wheel 1716 and the support rod 1714 can be hidden in the slide groove 1713a, which is convenient for replacing and bundling the signal cable 16.

Claims

1. A railway weak-current cable protection structure with anti-magnetic interference, characterized by: The invention comprises a pipe (17), a cable trench is formed in the pipe (17), and a signal cable (16) is placed in the cable trench; The pipeline (17) is composed of first segments (171) and second segments (172) arranged alternately and connected end to end; the first segment (171) is a shielding tube made of shielding material, and the second segment (172) is an elastic tube; The first segment (171) includes a tube body (1713), the inner wall of the tube body (1713) is provided with a slide groove (1713a) distributed along the circumference of the tube body (1713), the two ends of the slide groove (1713a) are respectively provided with a first limiting end (1713b) and a second limiting end (1713c), and the sliding seat (1713d) is slidably arranged in the slide groove (1713a); a support rod (1714) is rotatably mounted on the sliding seat (1713d), and the support rod (1714) and the sliding seat (1713d) are driven by a traction device; When the support rod (1714) slides to the first limit end (1713b) on the sliding seat (1713d), the support rod (1714) turns outward, and the signal cable (16) is supported by the support rod (1714) and is located at the upper part of the cable trench; When the sliding seat (1713d) slides to the lower part of the pipe (17), the support rod (1714) is retracted into the sliding groove (1713a) and the upper end is limited by the second limiting end (1713c); the signal cable (16) falls into the lower part of the cable trench.

2. The anti-magnetic interference railway weak-current cable protection structure according to claim 1, characterized in that: The signal cable (16) comprises a cable core (161) and an outermost outer sheath (162), wherein an armor layer (163), an inner lining layer (164), an aluminum sheath (165), a heat insulating layer (166) and a wrapping tape (167) are sequentially provided from the outer sheath (162) to the cable core (161).

3. The anti-magnetic interference railway weak-current cable protection structure according to claim 1, characterized in that: The first segment (171) is made of iron, and the second segment (172) is made of plastic.

4. The anti-magnetic interference railway weak-current cable protection structure according to claim 1, characterized in that: The slide groove (1713a) includes a bottom surface (1713k), a first side surface (1713m) and a second side surface (1713n), wherein the first side surface (1713m) and the second side surface (1713n) are located on opposite sides of the width direction of the slide groove (1713a); an end of the first side surface (1713m) away from the bottom surface (1713k) extends toward the second side surface (1713n) to form a first flange (1713s), and an end of the first flange (1713s) away from the first side surface (1713m) extends toward the bottom surface ( 1713k) extends to form a second flange (1713t), a limiting portion (1713p) is formed between the first flange (1713s), the second flange (1713t) and the first side surface (1713m), and the limiting portion (1713p) is connected to the sliding groove portion (1713q) through the connecting groove portion (1713r); the sliding groove (1713a) includes the limiting portion (1713p), the sliding groove portion (1713q) and the connecting groove portion (1713r); the cross section of the sliding groove (1713a) is U-shaped.

5. The anti-magnetic interference railway weak-current cable protection structure according to claim 4, characterized in that: The sliding seat (1713d) includes a limiting seat (1713u) with a through hole (1713y); a connecting plate (1713v) is fixed on the side of the limiting seat (1713u) away from the first pull wire (1715a); the connecting plate (1713v) is rotatably connected to a rotating shaft (1713w) with a reset spring; a handle (1713x) is fixed on the rotating shaft (1713w); the first pull wire (1715a) is connected to the handle (1713x) through the through hole (1713y).

6. The anti-magnetic interference railway weak-current cable protection structure according to claim 5, characterized in that: The traction device comprises a first wire groove (1713e) and a second wire groove (1713f) arranged on the upper side of the tube body (1713); the first wire groove (1713e) and the second wire groove (1713f) are parallel and arranged along the axis direction of the tube body (1713); one end of the first wire groove (1713e) is connected to the first limiting end (1713b) through the first channel (1713g); one end of the second wire groove (1713f) is connected to the second limiting end (1713c) through the second channel (1713h); the first wire groove (1713e) and the second wire groove (1713f) are connected to the second limiting end (1713c) through the second channel (1713h); The other ends are connected to the outside of the tube body (1713); a first winding wheel (1715) and a second winding wheel (1716) are correspondingly provided on the outside of the tube body (1713); the first pulling wire (1715a) on the first winding wheel (1715) passes through the first wire groove (1713e), the first channel (1713g) in sequence and is connected to the handle (1713x); the second pulling wire (1716a) on the second winding wheel (1716) passes through the second wire groove (1713f), the second channel (1713h), the slide groove (1713a) in sequence and is connected to the sliding seat (1713d).

7. The magnetic interference-resistant railway weak-current cable protection structure according to claim 6, characterized in that: A rack (1713z) is slidingly provided on the connecting plate (1713v), one end of the rack (1713z) faces the bottom surface (1713k), and a gear (1713j) meshing with the rack (1713z) is correspondingly fixed on the rotating shaft (1713w); a slot (1717) is radially opened on the bottom surface (1713k) on the lower side of the tube body (1713), and when the reset spring is reset, the rack (1713z) is inserted into the slot (1717).

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