A DC cable for rail transit

Abstract

The present invention discloses a rail transit DC cable, including a base plate, a plurality of mounting blocks are fixedly connected to the lower end surface of the base plate, a warning mechanism is arranged in each of the mounting blocks, a mounting groove is opened in the lower end surface of each of the mounting blocks, a fixing mechanism is arranged in each of the mounting grooves, and a plurality of the fixing mechanisms are fixedly connected to a cable body. The present invention can remotely detect the stability of the fixing mechanisms at various locations on the cable body in real time without the need for manual scheduled inspections, has high safety, can buffer the pressure on the cable body, and can immediately drive away the damage to the cable body by insects or rodents, thereby protecting the cable body, and can monitor the outer protective mechanism of the cable body in real time without the need for manual inspections, and can quickly locate when the outer protective mechanism of the cable body is damaged, has strong pertinence, and has good use effect.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a rail transit DC cable. Background Art

[0002] Cables occupy an important position in the current information data transmission, and the structure of cables is generally simple, mainly composed of multiple layers of protective layers and cable cores. The protective layers are mostly made of rubber materials, so they are not only prone to wear, but also prone to deformation and damage when subjected to pressure and impact, and have a short service life. In addition, the protective layers of existing DC cables will be bitten by insects and mice when in use, resulting in an increased probability of cable leakage, posing a major safety hazard. At the same time, when cables are transmitted over long distances, they are generally limited by multiple fixing mechanisms, which are generally bolts and nuts. After long-term use, the bolts and nuts are easy to loosen and fall off, and the cable fixing effect is poor. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art that the traditional cables have poor buffering performance and pose potential safety hazards after being bitten by rats and insects, and to propose a rail transit DC cable.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A rail transit DC cable comprises a substrate, wherein a plurality of mounting blocks are fixedly connected to the lower end surface of the substrate, a warning mechanism is provided in each of the mounting blocks, a mounting groove is provided in the lower end surface of each of the mounting blocks, a fixing mechanism is provided in each of the mounting grooves, a cable body is fixedly connected to the plurality of fixing mechanisms, a plurality of buffers are evenly arranged in the cable body, a plurality of placement grooves and insulation grooves are provided in each of the buffers, a connecting groove is horizontally provided between the placement grooves and insulation grooves at corresponding positions, an elastic airbag is provided in each of the placement grooves, a slider is horizontally slidably connected in each of the insulation grooves, a piston rod is slidably connected in each of the connecting grooves, a connecting rod is horizontally fixedly connected between each of the piston rods and the corresponding sliders, a reset spring is provided between the side of each slider away from the corresponding connecting rod and the wall of the insulation groove, and a detection mechanism is provided between each slider and the bottom wall of the corresponding insulation groove.

[0006] Furthermore, the cable body includes multiple cable cores, each of which is fixedly provided with an insulating layer, and multiple insulating layers are commonly fixedly provided with an armor layer, the armor layer is fixedly provided with a filling layer outside the armor layer, and multiple buffer members are fixedly inserted in the filling layer, the filling layer is fixedly provided with a water-blocking layer outside the filling layer, the water-blocking layer is fixedly provided with a protective layer outside the water-blocking layer, and the protective layer is fixedly provided with a wear-resistant layer outside the protective layer.

[0007] Furthermore, the fixing mechanism includes a fixing ring fixedly sleeved outside the cable body, through holes are opened between the installation groove wall and the side wall of the installation block and on the fixing ring, threaded rods are inserted into multiple through holes, and threaded rings are threadedly sleeved on the threaded rods.

[0008] Furthermore, each of the detection mechanisms includes a resistor plate fixedly connected to the bottom wall of the insulating groove, a vertical groove is vertically opened on the lower end surface of each slider, a conductive block is vertically slidably connected in each vertical groove, a limit spring is provided between the upper end surface of each conductive block and the bottom wall of the corresponding vertical groove, and an ammeter is fixedly installed on each slider.

[0009] Furthermore, a single-chip microcomputer and a pulse power supply are fixedly provided on the substrate respectively; each of the ammeters and one end of each of the resistor plates are electrically connected to the output end of the pulse power supply through a wire; both ends of each of the ammeters are electrically connected to the corresponding conductive block and the input end of the pulse power supply through a wire; and the output end of each of the ammeters is electrically connected to the input end of the single-chip microcomputer through a wire.

[0010] Furthermore, each warning mechanism includes an equipment slot opened in the mounting block, and each equipment slot is located directly above the corresponding mounting slot, each equipment slot is vertically slidably connected with a movable block, and each movable block is vertically fixedly connected with a top rod at the lower end, and a channel that cooperates with the top rod is vertically opened between the bottom wall of each equipment slot and the top wall of the mounting slot, and each top rod is slidably connected to the corresponding channel, a moving contact is fixedly provided on the side wall of each movable block, and a static contact that cooperates with the moving contact is fixedly provided on the wall of each equipment slot.

[0011] Furthermore, an alarm is fixedly provided on each of the movable blocks, each of the static contacts is electrically connected to the output end of the pulse power supply through a wire, both ends of each of the alarms are electrically connected to the moving contact and the output end of the pulse power supply through a wire, and the output end of each of the alarms is electrically connected to the single-chip computer through a wire.

[0012] The advantages of the present invention are:

[0013] 1: By setting up the warning mechanism, the stability of the fixing mechanisms at various locations on the cable body can be detected remotely and in real time. When the corresponding threaded rod and threaded ring become loose or fall off, the alarm at the corresponding position automatically sends a warning signal to the microcontroller. There is no need for manual regular inspections, and the use effect is good and the safety is high.

[0014] 2: By setting up a buffer, using the elastic airbag and the return spring inside the buffer, the pressure on the cable body can be buffered. When the cable body is bitten by insects or rodents, it can also automatically release insect repellent gas or liquid to drive away the insects or rodents in the first time, thereby protecting the cable body.

[0015] 3: By setting up a detection mechanism, the outer protection mechanism of the cable body can be monitored in real time. When the outer protection mechanism of the cable body is damaged, the detection mechanism at the corresponding position automatically transmits a signal to the single-chip microcomputer and issues a warning. No manual inspection is required, and when the outer protection mechanism of the cable body is damaged, it can be quickly located, with strong pertinence and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a rail transit DC cable proposed by the present invention;

[0017] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic diagram of the internal structure of a cable body in a rail transit DC cable proposed by the present invention;

[0019] Figure 4 This is a schematic structural diagram of a buffer component in a rail transit DC cable proposed by the present invention;

[0020] Figure 5 The present invention is a schematic structural diagram of a detection mechanism in a rail transit DC cable.

[0021] In the figure: 1 substrate, 2 mounting block, 3 mounting slot, 4 equipment slot, 5 movable block, 6 moving contact, 7 static contact, 8 push rod, 9 fixing ring, 10 through hole, 11 threaded rod, 12 threaded ring, 13 cable body, 1301 wear-resistant layer, 1302 protective layer, 1303 water-blocking layer, 1304 filling layer, 1305 buffer, 1306 armor layer, 1307 cable core, 1308 insulating layer, 14 placement slot, 15 elastic airbag, 16 insulating slot, 17 connecting slot, 18 piston rod, 19 slider, 20 connecting rod, 21 reset spring, 22 vertical slot, 23 conductive block, 24 limit spring, 25 resistor plate, 26 single-chip microcomputer, 27 pulse power supply, 28 alarm, 29 ammeter. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0023] Reference Figure 1-5 A rail transit DC cable comprises a substrate 1, a plurality of mounting blocks 2 are fixedly connected to the lower end surface of the substrate 1, each mounting block 2 is provided with a warning mechanism, a mounting groove 3 is provided on the lower end surface of each mounting block 2, a fixing mechanism is provided in each mounting groove 3, a cable body 13 is fixedly connected to the plurality of fixing mechanisms, a plurality of buffers 1305 are uniformly provided in the cable body 13, a plurality of placement grooves 14 and insulation grooves 16 are provided in each buffer 1305, a connecting groove 17 is horizontally provided between the placement grooves 14 and the insulation grooves 16 at corresponding positions, an elastic airbag 15 is provided in each placement groove 14, and each elastic airbag 1 5 are filled with high-pressure insect repellent gas or insect repellent liquid, so that when the elastic airbag 15 is bitten by insects or rodents, the insect repellent gas or insect repellent liquid in the elastic airbag 15 can be quickly sprayed out to drive away the insects or rodents, each insulating groove 16 is horizontally slidably connected with a slider 19, each connecting groove 17 is slidably connected with a piston rod 18, each piston rod 18 is horizontally fixedly connected with a connecting rod 20 between the corresponding sliders 19, a return spring 21 is provided between the side of each slider 19 away from the corresponding connecting rod 20 and the groove wall of the insulating groove 16, and a detection mechanism is provided between each slider 19 and the inner bottom wall of the corresponding insulating groove 16.

[0024] The cable body 13 includes multiple cable cores 1307, each cable core 1307 is fixedly provided with an insulating layer 1308, multiple insulating layers 1308 are commonly fixedly provided with an armor layer 1306, the armor layer 1306 is fixedly provided with a filling layer 1304 on the outside, and multiple buffer members 1305 are fixedly inserted in the filling layer 1304, the filling layer 1304 is fixedly provided with a water-blocking layer 1303 on the outside, the water-blocking layer 1303 is fixedly provided with a protective layer 1302 on the outside, and the protective layer 1302 is fixedly provided with a wear-resistant layer 1301 on the outside.

[0025] The fixing mechanism includes a fixing ring 9 fixedly sleeved outside the cable body 13, through holes 10 are opened between the groove wall of the installation groove 3 and the side wall of the installation block 2 and on the fixing ring 9, and threaded rods 11 are inserted into the multiple through holes 10, and threaded rings 12 are threadedly sleeved on the threaded rods 11.

[0026] Each detection mechanism includes a resistor plate 25 fixedly connected to the inner bottom wall of the insulating groove 16, a vertical groove 22 is vertically opened on the lower end surface of each slider 19, and a conductive block 23 is vertically slidably connected in each vertical groove 22. A limit spring 24 is provided between the upper end surface of each conductive block 23 and the inner bottom wall of the corresponding vertical groove 22. Through the elastic force of the limit spring 24, the lower end of each conductive block 23 is always against the upper end surface of the corresponding resistor plate 25, thereby ensuring the stability of the conductivity between the conductive block 23 and the resistor plate 25. The conductive block 23 and the resistor plate 25 together form a sliding resistor, and an ammeter 29 is fixedly installed on each slider 19.

[0027] A single-chip microcomputer 26 and a pulse power supply 27 are fixedly provided on the substrate 1, and each ammeter 29 and one end of each resistor plate 25 are electrically connected to the output end of the pulse power supply 27 through a wire, and both ends of each ammeter 29 are electrically connected to the corresponding conductive block 23 and the input end of the pulse power supply 27 through a wire, and the output end of each ammeter 29 is electrically connected to the input end of the single-chip microcomputer 26 through a wire. The ammeter 29 detects the current size in the corresponding circuit and feeds back the detection result to the single-chip microcomputer 26.

[0028] Each warning mechanism includes an equipment slot 4 opened in the mounting block 2, and each equipment slot 4 is located directly above the corresponding mounting slot 3, each equipment slot 4 is vertically slidably connected with a movable block 5, and each movable block 5 is vertically fixedly connected with a push rod 8 at the lower end, and a channel that cooperates with the push rod 8 is vertically opened between the bottom wall of each equipment slot 4 and the top wall of the mounting slot 3, and each push rod 8 is slidably connected to the corresponding channel, a moving contact 6 is fixedly provided on the side wall of each movable block 5, and a static contact 7 that cooperates with the moving contact 6 is fixedly provided on the slot wall of each equipment slot 4.

[0029] An alarm device 28 is fixedly provided on each movable block 5, each static contact 7 is electrically connected to the output end of the pulse power supply 27 through a wire, both ends of each alarm device 28 are electrically connected to the moving contact 6 and the output end of the pulse power supply 27 through a wire, and the output end of each alarm device 28 is electrically connected to the single-chip computer 26 through a wire. The wires in this device can be placed on the inner side of the armor layer 1306 or a groove can be opened on the outer side of the armor layer 1306 to avoid damage to the wires when the buffer 1305 is damaged.

[0030] When in use, firstly, the cable body 13 is fixedly connected to the plurality of mounting blocks 2 through the threaded rod 11, the threaded ring 12 and the fixing ring 9. At this time, the upper end of the fixing ring 9 abuts against the lower end of the push rod 8, and the push rod 8 drives the movable block 5 to move upward, and the moving contact 6 on the movable block 5 is separated from the static contact 7 on the wall of the equipment slot 4. The circuit where the alarm 28 is located is in an open circuit state, and the pulse power supply 27 is periodically turned on. When the pulse power supply 27 is turned on, the threaded rod 11 in the fixing mechanism corresponding to the alarm 28 sending out the alarm signal is loosened, and the staff can detect the fixing condition of the cable body 13 in real time, and timely detect and maintain the fixing mechanism at the corresponding position, without the need for manual regular inspection, and the use effect is good;

[0031] When the cable body 13 is folded or pressed during use or transportation, the filling layer 1304 squeezes the buffer 1305, and the elastic airbag 15 in the buffer 1305 is deformed by pressure to press the piston rod 18. The piston rod 18 drives the slider 19 to slide in the insulating groove 16 through the connecting rod 20 and compresses the corresponding return spring 21, so that the pressure of the cable body 13 can be buffered to prevent the cable core 1307 inside the cable body 13 from being damaged;

[0032] When the cable body 13 is bitten by insects and rodents, since the buffer 1305 is located outside the cable core 1307, the buffer 1305 will be damaged first, and the elastic airbag 15 in the buffer 1305 will be damaged, and the insect repellent gas or insect repellent liquid in the elastic airbag 15 will be sprayed to the outside, so that the insects and rodents can be driven away first to prevent the cable body 13 from being further damaged. At the same time, when the elastic airbag 15 at the corresponding position is damaged, the elastic airbag 15 is damaged and shrinks, then under the elastic force of the reset spring 21, the corresponding slider 19, the connecting rod 20 and the piston rod 18 move toward the placement groove 14, and At the same time, the slider 19 drives the conductive block 23 to move on the corresponding resistor plate 25, and the resistance value in the corresponding circuit changes greatly. When the pulse power supply 27 is turned on, the corresponding ammeter 29 detects that the current value in the corresponding circuit changes greatly. The ammeter 29 sends the detected current value to the single-chip computer 26. The single-chip computer 26 compares this value with its preset threshold value, so that it can quickly determine where the buffer 1305 on the cable body 13 is damaged, so as to timely maintain and repair the corresponding damaged part on the cable body 13. It can be detected online without manual inspection, and the positioning is accurate, targeted, and the use effect is good.

[0033] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rail transit DC cable, comprising a substrate (1), characterized in that: A plurality of mounting blocks (2) are fixedly connected to the lower end surface of the substrate (1), each of the mounting blocks (2) is provided with a warning mechanism, a mounting groove (3) is provided on the lower end surface of each of the mounting blocks (2), each of the mounting grooves (3) is provided with a fixing mechanism, a plurality of the fixing mechanisms are fixedly connected to a cable body (13), a plurality of buffer members (1305) are evenly provided in the cable body (13), and each of the buffer members (1305) is provided with a plurality of placement grooves (14) and insulation grooves (16), the positions of which correspond to each other. A connecting groove (17) is horizontally provided between the placement groove (14) and the insulating groove (16); an elastic airbag (15) is provided in each placement groove (14); a slider (19) is horizontally slidably connected in each insulating groove (16); a piston rod (18) is slidably connected in each connecting groove (17); a connecting rod (20) is horizontally fixedly connected between each piston rod (18) and the corresponding slider (19); and a connecting rod (20) is provided between the side of each slider (19) away from the corresponding connecting rod (20) and the groove wall of the insulating groove (16). A reset spring (21) is provided, and a detection mechanism is provided between each slider (19) and the inner bottom wall of the corresponding insulating groove (16); each detection mechanism comprises a resistor plate (25) fixedly connected to the inner bottom wall of the insulating groove (16); a vertical groove (22) is vertically opened on the lower end surface of each slider (19), and a conductive block (23) is vertically slidably connected in each vertical groove (22); a limit spring (24) is provided between the upper end surface of each conductive block (23) and the inner bottom wall of the corresponding vertical groove (22); each slider (19 ) are fixedly mounted with an ammeter (29); a single-chip computer (26) and a pulse power supply (27) are fixedly mounted on the substrate (1), each of the ammeters (29) and each of the resistor plates (25) are electrically connected to the output end of the pulse power supply (27) through a wire, and both ends of each of the ammeters (29) are electrically connected to the corresponding conductive block (23) and the input end of the pulse power supply (27) through a wire, and the output end of each of the ammeters (29) is electrically connected to the input end of the single-chip computer (26) through a wire.

2. A rail transit DC cable according to claim 1, characterized in that: The cable body (13) comprises a plurality of cable cores (1307), each of which is fixedly provided with an insulating layer (1308) on the outside, a plurality of insulating layers (1308) are commonly fixedly provided with an armor layer (1306) on the outside, a filling layer (1304) is fixedly provided on the outside of the armor layer (1306), and a plurality of buffer members (1305) are fixedly inserted in the filling layer (1304), a water-blocking layer (1303) is fixedly provided on the outside of the filling layer (1304), a protective layer (1302) is fixedly provided on the outside of the water-blocking layer (1303), and a wear-resistant layer (1301) is fixedly provided on the outside of the protective layer (1302).

3. A rail transit DC cable according to claim 1, characterized in that: The fixing mechanism comprises a fixing ring (9) fixedly sleeved outside the cable body (13), through holes (10) are provided between the groove wall of the mounting groove (3) and the side wall of the mounting block (2) and on the fixing ring (9), a plurality of the through holes (10) are commonly inserted with threaded rods (11), and a threaded ring (12) is threadedly sleeved on the threaded rod (11).

4. A rail transit DC cable according to claim 1, characterized in that: Each warning mechanism comprises an equipment slot (4) provided in the mounting block (2), and each equipment slot (4) is located directly above the corresponding mounting slot (3), each equipment slot (4) is vertically slidably connected with a movable block (5), the lower end of each movable block (5) is vertically fixedly connected with a push rod (8), a channel cooperating with the push rod (8) is vertically provided between the bottom wall of each equipment slot (4) and the top wall of the mounting slot (3), and each push rod (8) is slidably connected with the corresponding channel, a moving contact (6) is fixedly provided on the side wall of each movable block (5), and a stationary contact (7) cooperating with the moving contact (6) is fixedly provided on the slot wall of each equipment slot (4).

5. A rail transit DC cable according to claim 4, characterized in that: A warning device (28) is fixedly provided on each movable block (5), each static contact (7) is electrically connected to the output end of the pulse power supply (27) via a wire, both ends of each warning device (28) are electrically connected to the movable contact (6) and the output end of the pulse power supply (27) via a wire, and the output end of each warning device (28) is electrically connected to the single-chip computer (26) via a wire.

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