Connector structure for rail transit

Abstract

The invention belongs to the field of connectors, and provides a connector structure for rail transit, which comprises a socket end and a plug end, the socket end comprises an insulating shell, a first input cable, a second input cable, a first connecting mechanism, a second connecting mechanism and an intermediate conversion mechanism; the plug end comprises a first output cable, a second output cable, a fixing piece and a plug; the insulating shell comprises a first cylinder part, a middle connecting part and a second cylinder part; the middle switching mechanism is connected with the first connecting mechanism and the second connecting mechanism and is used for disconnecting one of the first connecting mechanism and the second connecting mechanism; the first input cable is communicated with the first output cable or the second input cable is communicated with the second output cable; switching of two electrical circuits formed by the connector has preposition performance, faults can be avoided to a great extent, safety and stability of the connector and the circuits of the connector are guaranteed, and related equipment for rail transit operation is safer and more reliable.

Description

Technical Field

[0001] The invention belongs to the field of connectors, and in particular relates to a connector structure used for rail transportation. Background Art

[0002] The connector is a bridge between electrical equipment, which can ensure the stable transmission of current and the accurate transmission of signals. In the rail transit system, the reliability of the connector is crucial, because any connection failure may cause the interruption of train operation or even a safety accident. And the electrical equipment in rail transit is often in a high temperature and harsh environment. Therefore, the rail transit connector needs to have high reliability and good environmental adaptability to cope with the harsh conditions such as vibration, impact, temperature change, etc. in the operation of the train. At present, in the electrical design of rail transit, a main line and a backup line are usually designed. When the main line fails, the backup line is enabled. For example, in a high temperature environment, when the main line temperature is too high and a failure occurs, it is necessary to switch to the backup line to ensure the safe and stable operation of various electrical equipment in rail transit. However, switching takes time and needs to be switched after the failure occurs, which has a certain delay defect. If it can be switched at high temperature without waiting for the failure, the equipment operation stability can be greatly improved. Based on this, the present invention designs a connector structure with pre-positioning, which can automatically switch to the backup line at high temperature, thereby avoiding the delay caused by fault switching in the traditional design. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a connector structure for rail transit to solve the problems in the prior art. The technical solution adopted by the present invention is: A connector structure for rail transit, comprising a socket end and a plug end; The socket end comprises an insulating housing, a first input cable, a second input cable, a first connecting mechanism, a second connecting mechanism and an intermediate conversion mechanism; The plug end includes a first output cable, a second output cable, a fixing member and a plug; The insulating shell comprises a first barrel portion, an intermediate connecting portion and a second barrel portion; The first connecting mechanism is arranged in the first barrel portion, the intermediate conversion mechanism is arranged in the intermediate connecting portion, and the second connecting mechanism is arranged in the second barrel portion. The rear end of the first connecting mechanism is connected to the first input cable, and the rear end of the second connecting mechanism is connected to the second input cable; the front end of the first connecting mechanism is used to connect to the first output cable, and the front end of the second connecting mechanism is used to connect to the second output cable; The intermediate conversion mechanism connects the first connection mechanism and the second connection mechanism, and is used to disconnect one of the first connection mechanism and the second connection mechanism; so that the first input cable is connected to the first output cable or the second input cable is connected to the second output cable.

[0004] Further, the first connection mechanism includes a first insulating tube, a first sliding core tube, a first rear end connecting core, a first middle insulating core, a first front end connecting core, a first opening portion, and a first slider heat conductive block; The first insulating tube is installed in the first cylindrical part, the first front end connecting iron core, the first middle insulating core and the first rear end connecting iron core are coaxial and arranged in sequence from front to back in the first insulating tube, the first middle insulating core is sleeved on the first sliding iron core tube, and the rear end of the first sliding iron core tube is sleeved on the first rear end connecting iron core; the first cylindrical part and the middle connecting part are connected through the first opening part, and the side of the first insulating tube is provided with a through hole connected to the first opening part; the first opening part can be slidably provided with the first slider heat conductive block, one end of the first slider heat conductive block is fixedly connected to the side of the first sliding iron core tube, and the other end of the first sliding iron core tube is connected to the intermediate conversion mechanism.

[0005] Furthermore, the first connection mechanism also includes a first insulating cushion layer, a first front-end crimping tube, a first rear-end crimping tube, a first heat-conducting frame and a first rear-end plate; The first front end connecting iron core is sleeved with the first front end compression tube, and the first rear end connecting iron core is sleeved with the first rear end compression tube, and the first front end compression tube and the first rear end compression tube have the same outer diameter; The first insulating cushion layer is arranged on the inner wall surface of the first insulating tube, and the first insulating cushion layer is sleeved on the first front end crimping tube and the first rear end crimping tube; The first heat-conducting frame is disposed in the first opening, the first heat-conducting frame is a rectangular hollow structure, and the first sliding block heat-conducting block is disposed in the first heat-conducting frame so as to be slidable forward and backward; The first rear end plate is installed on the rear end surface of the first insulating tube, the first rear end plate is fixedly connected to the rear end of the first rear end connecting iron core, and the first input cable is connected to the first rear end plate.

[0006] Furthermore, the second connecting mechanism has the same structure as the first connecting mechanism, and the second connecting mechanism and the first connecting mechanism are symmetrically distributed on both sides of the intermediate conversion mechanism; The second connection mechanism includes a corresponding second insulating tube, a second insulating cushion layer, a second sliding iron core tube, a second rear end connecting iron core, a second middle insulating core, a second front end connecting iron core, a second front end crimping tube, a second rear end crimping tube, a second opening, a second slider heat conductive block, a second heat conductive frame and a second rear end plate; the second input cable is connected to the second rear end plate; The intermediate conversion mechanism is used to push the first slider heat conductive block and the second slider heat conductive block to move relative to each other, so that the first sliding iron core tube and the second sliding iron core tube move relative to each other, so that one of the first sliding iron core tube and the second sliding iron core tube is connected to the corresponding front end connecting iron core.

[0007] Further, the intermediate conversion mechanism includes a rotating tube, a first arc-shaped connecting plate and a second arc-shaped connecting plate; The rotating tube is rotatably arranged in the middle connecting part, and the first arc-shaped connecting plate and the second arc-shaped connecting plate are respectively nested on the outer side of the rotating tube; the first arc-shaped connecting plate is fixedly connected to one end of the first slider heat-conducting block passing through the first opening, and the second arc-shaped connecting plate is fixedly connected to one end of the second slider heat-conducting block passing through the second opening; The rotating tube is used to push the first arc-shaped connecting plate and the second arc-shaped connecting plate to move relative to each other when rotating, and the rotating tube is connected to a driving device for driving the rotating tube to rotate.

[0008] Furthermore, a first spiral groove and a second spiral groove are provided on the outer side surface of the rotating tube, the spiral directions of the first spiral groove and the second spiral groove are opposite, the inner side surface of the first arc-shaped connecting plate is fixedly connected to the first protrusion, and the inner side surface of the second arc-shaped connecting plate is fixedly connected to the second protrusion, the first protrusion and the second protrusion are respectively clamped in the first spiral groove and the second spiral groove, and the first spiral groove and the second spiral groove are used to push the first protrusion and the second protrusion to move relative to each other during rotation, thereby making the first arc-shaped connecting plate and the second arc-shaped connecting plate move relative to each other.

[0009] Furthermore, the interior of the rotating tube is filled with an insulating heat-conducting liquid medium; the front end of the rotating tube is provided with an opening, the opening is rotatably connected to a fixed head, and the fixed head is provided with a first detection mechanism and a second detection mechanism; The first detection mechanism and the second detection mechanism are used to detect the expansion degree of the insulating heat-conducting liquid medium. When the expansion of the insulating heat-conducting liquid medium reaches a threshold value, the driving device drives the rotating tube to rotate, so that the first connecting mechanism and the second connecting mechanism switch the on-off state.

[0010] Further, the first detection mechanism includes a first fixed tube, a first displacement detection component, a first plug tube, a first piston, a first hollow tube, a first elastic tube and a first liquid medium; The first displacement detection component is fixedly connected in the first fixed tube, the first plug-in tube is sleeved on the first fixed tube, the first plug-in tube is fixedly connected and passes through the fixed head, the first plug-in tube is connected to the rotating tube, the first piston is slidably arranged in the first plug-in tube, there is a gap between the first piston and the first displacement detection component, the first hollow tube is arranged between the first piston and the first displacement detection component, the first hollow tube is fixedly connected to the outer side of the first plug-in tube, the first hollow tube is connected to the first plug-in tube, and the first elastic tube is arranged in the first plug-in tube; one end of the first elastic tube is closed and the other end is open, the open end is fixedly connected to the first hollow tube, and the closed end is located at the opening of the first hollow tube away from the first plug-in tube; A first compression chamber is formed inside the first plug-in tube, between the first piston and the first fixed tube, and the first compression chamber is connected to the first hollow tube and the first elastic tube; the first compression chamber, the first hollow tube and the first elastic tube are filled with the first liquid medium; The second detection mechanism has the same structure as the first detection mechanism and is symmetrically arranged, and the second detection mechanism includes a corresponding second fixed tube, a second displacement detection component, a second plug-in tube, a second piston, a second hollow tube, a second elastic tube and a second liquid medium; The inner side surfaces of the first arc-shaped connecting plate and the second arc-shaped connecting plate are flush with the opening of the first hollow tube and the opening of the second hollow tube respectively; When the front end of the first sliding iron core tube is sleeved on the first front end connecting iron core, the inner side surface of the first arc-shaped connecting plate covers the opening of the first hollow tube; when the insulating heat-conducting liquid medium expands to a threshold value, the second piston is displaced to the maximum, the second elastic tube is extended, and the driving device drives the rotating tube to rotate, so that the first connecting mechanism is disconnected, the second connecting mechanism is connected, the second input cable is connected with the second output cable, and the first input cable is disconnected from the first output cable; When the front end of the second sliding iron core tube is sleeved on the second front end connecting iron core, the inner side surface of the second arc-shaped connecting plate covers the opening of the second hollow tube; when the insulating heat-conducting liquid medium expands to a threshold value, the first piston is displaced to the maximum, the first elastic tube is extended, and the driving device drives the rotating tube to rotate, so that the second connecting mechanism is disconnected, the first connecting mechanism is connected, the second input cable is disconnected from the second output cable, and the first input cable is connected to the first output cable.

[0011] Furthermore, a front cover plate is installed at the front end of the middle connecting part, and the first fixing tube and the second fixing tube are fixed on the front cover plate.

[0012] Furthermore, the driving device is an electric motor.

[0013] The present invention has the following beneficial effects: when the present invention is used in practice, when the first input cable and the first output cable are heated to a threshold value after being used for a long time in a high-temperature environment, the on-off state of the first connecting mechanism and the second connecting mechanism is switched through the intermediate conversion mechanism, so that the first connecting mechanism of the main cable is disconnected and the second connecting mechanism is connected, thereby switching to the backup line of the second input cable and the second output cable, which can ensure that the connector and the line operate in a stable environment, and when the second input cable and the second output cable are hot, they can be switched back to the main line of the first input cable and the first output cable, so that timely switching can be performed before a high-temperature fault occurs. Compared with the prior art of switching after a fault occurs, the switching of the two electrical lines formed by the connector of the present invention is proactive, which can avoid the occurrence of faults to a great extent, ensure the safety and stability of the connector and its line, and make the relevant equipment for rail transit operation safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the intermediate conversion mechanism; Figure 3 yes Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 is a schematic diagram when the second elastic tube is blocked; Figure 5 It is a schematic diagram of the spiral groove; Figure 6 It is a schematic diagram of the connection relationship of the opening; Figure 7 It is a schematic diagram of the connection relationship of the electric motor; Figure 8 It is a schematic diagram of the distribution relationship of the thermal conductive sheet; Fig. 9 is a schematic diagram of an implementation method of a multi-core cable; In the figure: insulating shell 1, first input cable 2, second input cable 3, first output cable 4, second output cable 5, fixing part 6, plug 7, rotating tube 8, main shaft 9, heat conductive sheet 10, rear end sealing plug 11, synchronous wheel 12, rotating sleeve 13, connecting sleeve 14, heat dissipation fin 15, first detection mechanism 16, second detection mechanism 17, insulating heat conductive liquid medium 18, electric motor 19, front cover 20, connecting wire harness 21, plug core 22, first cylinder part 101, middle connecting part 102, second cylinder part 103, first insulating tube 201, first insulating cushion layer 202, first sliding iron core tube 203, first rear end connecting iron core 204, first middle insulating core 205, first front end connecting iron core 206, first front end crimping tube 207, first rear end crimping tube 208, first opening 209, first slider heat conductive block 210, first heat conductive frame 211, first rear end plate 212, first The second insulating tube 301, the second insulating cushion layer 302, the second sliding iron core tube 303, the second rear end connecting iron core 304, the second middle insulating core 305, the second front end connecting iron core 306, the second front end crimping tube 307, the second rear end crimping tube 308, the second opening 309, the second slider heat conductive block 310, the second heat conductive frame 311, the second rear end plate 312, the first fixed tube 161, the first displacement detection component 162, the first plug tube 163, the first piston 164, the first hollow tube 165, the first elastic tube 166, the first liquid medium 167, the second fixed tube 171, the second displacement detection component 172, the second plug tube 173, the second piston 174, the second hollow tube 175, the second elastic tube 176, the second liquid medium 177, the first arc connecting plate 801, the second arc connecting plate 802, the first spiral groove 803, the second spiral groove 804, the limit strip 805, and the fixed head 806. DETAILED DESCRIPTION

[0015] The following will be combined with the embodiments of the present invention Figure 1-Figure 9 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0016] It should be noted that in the present invention, "front end" or "front" refers to the opposite end of the socket end and the plug end. Figure 1 The right side of the socket end and the left side of the plug end; "rear end" and "rear" refer to the end opposite to the socket end and the plug end, such as Figure 1In the present invention, for the convenience of description, two components of the same structure are described in the form of "first" and "second". It can be clearly seen that the components referred to by "first" and "second" have the same structure and connection structure and are symmetrically arranged.

[0017] like Figure 1 , a connector structure for rail transit, comprising a socket end and a plug end; The socket end comprises an insulating housing 1, a first input cable 2, a second input cable 3, a first connecting mechanism, a second connecting mechanism and an intermediate conversion mechanism; The plug end includes a first output cable 4, a second output cable 5, a fixing member 6 and a plug 7; The insulating housing 1 comprises a first cylindrical portion 101, an intermediate connecting portion 102 and a second cylindrical portion 103; The first connecting mechanism is arranged in the first barrel portion 101, the intermediate conversion mechanism is arranged in the intermediate connecting portion 102, and the second connecting mechanism is arranged in the second barrel portion 103. The rear end of the first connecting mechanism is connected to the first input cable 2, and the rear end of the second connecting mechanism is connected to the second input cable 3; the front end of the first connecting mechanism is used to connect to the first output cable 4, and the front end of the second connecting mechanism is used to connect to the second output cable 5; The intermediate conversion mechanism connects the first connection mechanism and the second connection mechanism, and is used to disconnect one of the first connection mechanism and the second connection mechanism; so that the first input cable 2 is connected to the first output cable 4 or the second input cable 3 is connected to the second output cable 5.

[0018] The first barrel portion 101, the intermediate connecting portion 102, and the second barrel portion 103 are all provided with chambers to accommodate the corresponding first connecting mechanism, the second connecting mechanism, and the intermediate conversion mechanism. In the present invention, the first input cable 2 corresponds to connecting or disconnecting the first output cable 4, and the second input cable 3 corresponds to connecting or disconnecting the second output cable 5. The first input cable 2 and the second input cable 3, the first output cable 4 and the second output cable 5 are in the relationship of main cables and spare cables. The first input cable 2 and the second input cable 3 form a parallel structure connected to the corresponding input device, and the first output cable 4 and the second output cable 5 form a parallel structure connected to the corresponding output device. For the convenience of explanation, the present invention takes the first input cable 2 and the first output cable 4 as the main trunk cables, and the second input cable 3 and the second output cable 5 as spare cables as an example for explanation.

[0019] When the present invention is used in practice, when the first input cable 2 and the first output cable 4 are heated to a threshold value after being used in a high-temperature environment for a long time, the on-off state of the first connecting mechanism and the second connecting mechanism is switched through the intermediate conversion mechanism, so that the first connecting mechanism of the main cable is disconnected and the second connecting mechanism is connected, thereby switching to the backup line of the second input cable 3 and the second output cable 5, which can ensure that the connector and the line operate in a stable environment. When the second input cable 3 and the second output cable 5 are hot, they can be switched back to the main line of the first input cable 2 and the first output cable 4, so that timely switching can be performed before a high-temperature fault occurs. Compared with the prior art of switching after a fault occurs, the switching of the two electrical lines formed by the connector of the present invention is proactive, which can avoid the occurrence of faults to a great extent, ensure the safety and stability of the connector and its lines, and make the relevant equipment for rail transit operation safer and more reliable.

[0020] like Figure 1 , Figure 6 The first connecting mechanism includes a first insulating tube 201, a first sliding core tube 203, a first rear end connecting core 204, a first intermediate insulating core 205, a first front end connecting core 206, a first opening 209, and a first slider heat conducting block 210; The first insulating tube 201 is installed in the first cylindrical part 101, the first front end connecting core 206, the first middle insulating core 205 and the first rear end connecting core 204 are coaxial and arranged in sequence from front to back in the first insulating tube 201, the first middle insulating core 205 is sleeved with the first sliding core tube 203, and the rear end of the first sliding core tube 203 is sleeved on the first rear end connecting core 204; the first cylindrical part 101 and the middle connecting part 102 are connected through the first opening part 209, and the side of the first insulating tube 201 is provided with a through hole connected to the first opening part 209; the first opening part 209 is provided with the first slider heat conductive block 210 which can slide back and forth, one end of the first slider heat conductive block 210 is fixedly connected to the side of the first sliding core tube 203, and the other end of the first sliding core tube 203 is connected to the intermediate conversion mechanism.

[0021] There is a gap between the front end crimping tube and the rear end crimping tube, and the gap is the sliding space of the sliding core tube. The opening is formed by opening a connecting through hole on the insulating tube, the insulating cushion layer, and the middle connecting part. The opening is a rectangular hole structure, and the slider heat conductive block can slide inside it, and the opening constrains the rotation of the slider heat conductive block, so that it cannot rotate circumferentially in the middle connecting part. It should be noted that the rear end of the sliding core tube is always sleeved on the corresponding rear end connecting core, and when the front end of the sliding core tube is sleeved on the corresponding front end connecting core, the front end connecting core, the sliding core tube and the rear end connecting core are connected. The on-off function of the present invention is the on-off function formed by the positional relationship between the sliding core tube and the front end connecting core.

[0022] Furthermore, the first connection mechanism further includes a first insulating cushion layer 202, a first front end crimping tube 207, a first rear end crimping tube 208, a first heat conducting frame 211 and a first rear end plate 212; The first front end connecting iron core 206 is sleeved with the first front end pressing tube 207, and the first rear end connecting iron core 204 is sleeved with the first rear end pressing tube 208, and the first front end pressing tube 207 and the first rear end pressing tube 208 have the same outer diameter; The first insulating pad layer 202 is provided on the inner wall surface of the first insulating tube 201, and the first insulating pad layer 202 is sleeved on the first front end crimping tube 207 and the first rear end crimping tube 208; The first heat-conducting frame 211 is disposed in the first opening 209 . The first heat-conducting frame 211 is a rectangular hollow structure. The first sliding block heat-conducting block 210 is slidably disposed in the first heat-conducting frame 211 . The first rear end plate 212 is installed on the rear end surface of the first insulating tube 201 . The first rear end plate 212 is fixedly connected to the rear end of the first rear end connecting core 204 . The first input cable 2 is connected to the first rear end plate 212 .

[0023] Furthermore, the second connecting mechanism has the same structure as the first connecting mechanism, and the second connecting mechanism and the first connecting mechanism are symmetrically distributed on both sides of the intermediate conversion mechanism; The second connection mechanism includes a corresponding second insulating tube 301, a second insulating cushion layer 302, a second sliding core tube 303, a second rear end connecting core 304, a second middle insulating core 305, a second front end connecting core 306, a second front end crimping tube 307, a second rear end crimping tube 308, a second opening 309, a second slider heat conducting block 310, a second heat conducting frame 311 and a second rear end plate 312; the second rear end plate 312 is connected to the second input cable 3; The intermediate conversion mechanism is used to push the first slider heat conductive block 210 and the second slider heat conductive block 310 to move relative to each other, so that the first sliding iron core tube 203 and the second sliding iron core tube 303 move relative to each other, so that one of the first sliding iron core tube 203 and the second sliding iron core tube 303 is connected to the corresponding front end connecting iron core.

[0024] In the present invention, the first and second insulating tubes can be connected to the first and second cylindrical parts by means of bolts, buckles, threads, etc. The first and second intermediate insulating cores can be made of rubber, plastic, ceramic, etc. The two ends of the intermediate insulating core can be connected to the rear connecting core and the front connecting core by means of bolts, threads, buckles, etc. Arc extinguishing grids can be provided at both ends of the first intermediate insulating core 205 and the second intermediate insulating core 305 to eliminate the arc formed when the sliding core tube slides. The front end crimping tube and the rear end crimping tube are preferably made of elastic materials, such as rubber, plastic, etc., and their purpose is to tighten the rear end connecting core and the front end connecting core. The rear end connecting core is fixedly connected to the rear end plate, and the rear end plate and the cylindrical part can be connected by bolts. The heat conducting frame remains stationary and does not move with the sliding core tube.

[0025] Figure 5 A schematic diagram of the separation of the socket end and the plug end is given in FIG; the first output cable 4 and the second output cable 5 can be connected to the fixing member 6 by plugging, and two plugs 7 are arranged on the fixing member 6, and a wiring harness connecting the two plugs 7 is arranged in the fixing member 6, so that the first output cable 4 and the second output cable 5 are connected to the plugs 7 respectively. When the plug end and the socket end are matched, the two plugs 7 are plugged into the front hole core of the front connection core, thereby forming an electrical connection, and the signal or current is transmitted in sequence through the input cable, the rear connection core, the sliding core tube, the front connection core, the plug, and the output cable.

[0026] like Figure 1-Figure 3 , the intermediate conversion mechanism includes a rotating tube 8, a first arc-shaped connecting plate 801 and a second arc-shaped connecting plate 802; The rotating tube 8 is rotatably disposed in the middle connecting portion 102, and the first arc-shaped connecting plate 801 and the second arc-shaped connecting plate 802 are respectively embedded on the outer surface of the rotating tube 8; the first arc-shaped connecting plate 801 is fixedly connected to one end of the first slider heat-conducting block 210 passing through the first opening 209, and the second arc-shaped connecting plate 802 is fixedly connected to one end of the second slider heat-conducting block 310 passing through the second opening 309; The rotating tube 8 is used to push the first arc-shaped connecting plate 801 and the second arc-shaped connecting plate 802 to move relative to each other when rotating. The rotating tube 8 is connected to a driving device for driving the rotating tube 8 to rotate.

[0027] The rotating tube 8 and the driving device are used as the driving part of the present invention to make the first slider heat conducting block 210 and the second slider heat conducting block 310 move relative to each other, that is, move closer to or away from each other. Using one component to drive the movement of the two slider heat conducting blocks can reduce the complexity of the structure.

[0028] like Figure 5 A first spiral groove 803 and a second spiral groove 804 are provided on the outer side surface of the rotating tube 8, and the spiral directions of the first spiral groove 803 and the second spiral groove 804 are opposite. The inner side surface of the first arc-shaped connecting plate 801 is fixedly connected to the first protrusion, and the inner side surface of the second arc-shaped connecting plate 802 is fixedly connected to the second protrusion. The first protrusion and the second protrusion are respectively clamped in the first spiral groove 803 and the second spiral groove 804. The first spiral groove 803 and the second spiral groove 804 are used to push the first protrusion and the second protrusion to move relative to each other during rotation, so that the first arc-shaped connecting plate 801 and the second arc-shaped connecting plate 802 move relative to each other.

[0029] The first arc-shaped connecting plate 801 and the second arc-shaped connecting plate 802 are both arc-shaped structures, and are symmetrically nested on both sides of the rotating tube 8. When the rotating tube 8 rotates, the two arc-shaped connecting plates move relative to each other through the spiral groove and the cooperation between the spiral groove and the protrusion. The arc-shaped connecting plates and the corresponding slider heat-conducting blocks and the sliding iron core tube can be connected through bolts or by bonding.

[0030] like Figure 1-Figure 4 The interior of the rotating tube 8 is filled with an insulating heat-conducting liquid medium 18; the front end of the rotating tube 8 is provided with an opening, and the opening is rotatably connected to a fixed head 806, and the fixed head 806 is provided with a first detection mechanism 16 and a second detection mechanism 17; The first detection mechanism 16 and the second detection mechanism 17 are used to detect the expansion degree of the insulating heat-conducting liquid medium 18. When the expansion of the insulating heat-conducting liquid medium 18 reaches a threshold value, the driving device drives the rotating tube 8 to rotate, so that the first connecting mechanism and the second connecting mechanism switch the on-off state.

[0031] The insulating heat-conducting liquid medium 18 is a prior art, such as insulating oil, or its insulating liquid. The present invention uses the principle of liquid expansion to determine the temperature of the connector, which can more comprehensively determine the temperature of the connection, and the insulating heat-conducting liquid medium 18 can also play a role in cooling and dissipating heat. The reason why the present invention does not directly use a thermometer is that a thermometer can only measure the temperature in a certain area, while the present invention transfers heat from the cable line part to the insulating heat-conducting liquid medium 18, and identifies the temperature of the connector by determining the expansion degree of the insulating heat-conducting liquid medium 18. Compared with a single thermometer, it can more comprehensively determine the connector temperature, and can further achieve the purpose of heat dissipation and cooling.

[0032] Taking the first connecting mechanism as an example, the principle structure of the second connecting mechanism is the same, and the heat dissipation function of the insulating heat-conducting liquid medium 18 is described as follows: one end of the first heat-conducting frame 211 contacts the outer wall surface of the first sliding iron core tube 203, and the other end of the first heat-conducting frame 211 contacts the first arc-shaped connecting plate 801; the heat-conducting frame, the arc-shaped connecting plate, and the slider heat-conducting block are all made of insulating and heat-conducting materials, such as alumina, graphite, polyurethane, etc.

[0033] When the first front end connecting core 206, the first sliding core tube 203 and the first rear end connecting core 204 are connected, at the connector, the heat generated by these three components is transferred to the first heat conductive frame 211 and the first slider heat conductive block 210 through the first sliding core tube 203, and then transferred to the first arc-shaped connecting plate 801 through the first heat conductive frame 211 and the first slider heat conductive block 210. The first arc-shaped connecting plate 801 transfers the heat to the rotating tube 8, causing the insulating heat conductive liquid medium 18 to expand due to the heat.

[0034] In the present invention, the slider heat conducting block and the arc connecting plate not only play the function of driving the mechanical movement of the sliding iron core tube, but also can realize the function of transferring heat. In addition, part of the heat of the front connecting iron core, the sliding iron core tube and the rear connecting iron core is also transferred to the insulating heat conducting liquid medium 18 by means of heat radiation.

[0035] Furthermore, the first detection mechanism 16 includes a first fixed tube 161, a first displacement detection component 162, a first plug tube 163, a first piston 164, a first hollow tube 165, a first elastic tube 166 and a first liquid medium 167; The first displacement detection component 162 is fixedly connected inside the first fixed tube 161, the first plug-in tube 163 is sleeved on the first fixed tube 161, the first plug-in tube 163 is fixedly connected and passes through the fixed head 806, the first plug-in tube 163 is connected to the rotating tube 8, the first piston 164 is slidably arranged inside the first plug-in tube 163, there is a gap between the first piston 164 and the first displacement detection component 162, the first hollow tube 165 is arranged between the first piston 164 and the first displacement detection component 162, the first hollow tube 165 is fixedly connected to the outer side of the first plug-in tube 163, the first hollow tube 165 is connected to the first plug-in tube 163, and the first elastic tube 166 is arranged inside the first plug-in tube 163; one end of the first elastic tube 166 is closed and the other end is open, the open end of the first elastic tube 166 is fixedly connected to the first hollow tube 165, and the closed end of the first elastic tube 166 is located at the opening of the first hollow tube 165 away from the first plug-in tube 163; A first compression chamber is formed inside the first plug-in tube 163, between the first piston 164 and the first fixed tube 161, and the first compression chamber is connected to the first hollow tube 165 and the first elastic tube 166; the first compression chamber, the first hollow tube 165 and the first elastic tube 166 are filled with the first liquid medium 167; The second detection mechanism 17 has the same structure as the first detection mechanism 16 and is symmetrically arranged. The second detection mechanism 17 includes a corresponding second fixed tube 171, a second displacement detection component 172, a second plug tube 173, a second piston 174, a second hollow tube 175, a second elastic tube 176 and a second liquid medium 177; The inner side surfaces of the first arc-shaped connecting plate 801 and the second arc-shaped connecting plate 802 are flush with the opening of the first hollow tube 165 and the opening of the second hollow tube 175 , respectively.

[0036] Specifically, the first elastic tube 166 and the second elastic tube 176 are preferably bellows. Taking the first elastic tube 166 as an example, its open end faces the first plug-in tube 163, and its open end can be connected to the first hollow tube 165 through a bolt flange structure, and the end of the first hollow tube 165 is connected to the outer side of the first plug-in tube 163 through another bolt flange structure. The first displacement detection component 162 and the second displacement detection component 172 are both existing technologies, and can be distance sensors, photoelectric sensors, displacement sensors, proximity switches and other components, and their purpose is to monitor the displacement change of the piston in real time. The displacement change of the piston is linearly related to the expansion degree of the insulating heat-conducting liquid medium 18, and can reflect the temperature of the insulating heat-conducting liquid medium 18. The front end of the first plug-in tube 163 can be connected to the front cover plate 20 by bolts.

[0037] When the front end of the first sliding iron core tube 203 is sleeved on the first front end connecting iron core 206, the inner side surface of the first arc-shaped connecting plate 801 covers the opening of the first hollow tube 165; when the insulating heat-conducting liquid medium 18 expands to a threshold value, the second piston 174 is displaced to the maximum, the second elastic tube 176 is extended, and the driving device drives the rotating tube 8 to rotate, so that the first connecting mechanism is disconnected, the second connecting mechanism is connected, the second input cable 3 is connected with the second output cable 5, and the first input cable 2 is disconnected from the first output cable 4; When the front end of the second sliding iron core tube 303 is sleeved on the second front end connecting iron core 306, the inner side surface of the second arc-shaped connecting plate 802 covers the opening of the second hollow tube 175; when the insulating heat-conducting liquid medium 18 expands to a threshold value, the first piston 164 is displaced to the maximum, the first elastic tube 166 is extended, and the driving device drives the rotating tube 8 to rotate, so that the second connecting mechanism is disconnected, the first connecting mechanism is connected, the second input cable 3 is disconnected from the second output cable 5, and the first input cable 2 is connected to the first output cable 4.

[0038] The workflow of the present invention is as follows: like Figure 1-Figure 3 When the first connecting mechanism is connected, that is, when the main line cables of the first input cable 2 and the first output cable 4 are working, the front end of the first sliding iron core tube 203 is sleeved on the first front end connecting iron core 206, and the first sliding iron core tube 203, the first front end connecting iron core 206 and the first rear end connecting iron core 204 are in a line connection relationship. The inner side surface of the first arc-shaped connecting plate 801 covers the opening of the first hollow tube 165. When the working current of the first input cable 2 and the first output cable 4 increases, the first sliding iron core tube 203, the first front end connecting iron core 206 and the first rear end connecting iron core 204 heat up abnormally, and the heat of the first sliding iron core tube 203 is transferred to the first arc-shaped connecting plate 801 through the first heat-conducting frame 211 and the first slider heat-conducting block 210. The first arc-shaped connecting plate 801 transfers the heat to the rotating tube 8, causing the insulating heat-conducting liquid medium 18 to expand due to the heat. When the insulating heat-conducting liquid medium 18 expands to a threshold value, the second piston 174 is displaced to the maximum, and the distance between the second piston 174 and the second displacement detection component 172 is the shortest. In the process of the insulating heat-conducting liquid medium 18 pushing the second piston 174 to displace, the volume of the first plug-in tube 163 becomes smaller, and the second liquid medium 177 flows toward the second elastic tube 176, and the second elastic tube 176 is compressed and stretched. After the second displacement detection component 172 detects the displacement threshold of the second piston 174, the PLC single-chip microcomputer controls the driving device to drive the rotating tube 8 to rotate, so that the first connecting mechanism is disconnected and the second connecting mechanism is connected, the second input cable 3 is connected to the second output cable 5, and the first input cable 2 is disconnected from the first output cable 4, so as to complete the cutting of the main cable and enable the function of the backup cable. The process of switching from the backup cable to the main cable is the same and will not be repeated. Figure 4 , a state diagram showing the inner side surface of the second arc-shaped connecting plate 802 covering the opening of the second hollow tube 175 is shown.

[0039] In the present invention, the first detection mechanism 16 is used to detect the temperature state of the second connection mechanism, and the second detection mechanism 17 is used to detect the temperature state of the first connection mechanism. Taking the first connection mechanism as an example, when the first connection mechanism is connected, since the first elastic tube 166 of the first detection mechanism 16 is blocked by the first arc-shaped connection plate 801 and cannot be extended, the first piston 164 cannot move, and at this time, detection can only be performed through the second detection mechanism 17. The present invention uses two detection mechanisms to separately detect the first and second connection mechanisms, and can realize the function of separate detection after switching.

[0040] In addition, the reset function of the first elastic tube 166 and the second elastic tube 176 is described as follows: a wedge-shaped inclined surface can be set on the inner side surface of the front end of the first arc-shaped connecting plate 801 and the second arc-shaped connecting plate 802. When the elastic tube is extended, the arc-shaped connecting plate moves to the end of the elastic tube and pushes the elastic tube to retract through its wedge-shaped inclined surface. In addition, a spring (not shown in the figure) can be set inside the two elastic tubes, and the two ends of the spring are fixedly connected to the inner top of the elastic tube and the first plug-in tube, and the elastic tube is reset through the combined action of the wedge-shaped inclined surface and the spring.

[0041] Taking the first elastic tube 166 as an example, when the first elastic tube 166 is reset, Figure 3 , the second elastic tube 176 is not blocked, and the first elastic tube 166 pushes the first piston 164 to move backward to reset through the hydraulic action of the first liquid medium 167 during the reset process of the first piston 164. Under the hydraulic influence of the insulating heat-conducting liquid medium 18, the second elastic tube 176 slightly extends during the reset process of the first piston 164. Since the insulating heat-conducting liquid medium 18 is still in a high temperature state at this time, the detection value of the second displacement detection component 172 is relatively large at the beginning, and then during the operation of the connector, the insulating heat-conducting liquid medium 18 slowly cools down and restores to a normal volume. Therefore, for the second displacement detection component 172, after the second connection mechanism switches to the first connection mechanism, the detection value gradually decreases, and when the temperature of the first connection mechanism is abnormal, the second displacement detection component 172 gradually increases. This is caused by the high temperature state of the insulating heat-conducting liquid medium 18. In order to eliminate the influence on the detection, a time threshold can be set, such as 1 minute. After the first and second connection mechanisms are switched, if the detection value gradually decreases, it is a normal state, and the drive device does not work. After the switch, if the detection value remains unchanged within the time threshold, it means that the ambient temperature of the connector is too high. If after the switch, the detection value decreases first and then reaches the maximum threshold outside the time threshold, it is an abnormal temperature state and the drive device works. The increase in the detection value means that the piston moves forward and the insulating heat-conducting liquid medium 18 expands; the decrease in the detection value means that the piston moves backward and the insulating heat-conducting liquid medium 18 contracts.

[0042] It should be noted that the displacement threshold of the piston and the expansion threshold of the insulating heat-conducting liquid medium 18 are in a linear equivalent relationship. The displacement threshold of the piston can be set to the displacement amount of the piston contact displacement detection component, which is the expansion threshold of the insulating heat-conducting liquid medium 18.

[0043] The control process of the present invention is a prior art and can be realized by a PLC single chip microcomputer.

[0044] Furthermore, a front cover plate 20 is installed at the front end of the middle connecting portion 102 , and the first fixing tube 161 and the second fixing tube 171 are fixed on the front cover plate 20 .

[0045] Furthermore, the driving device is an electric motor 19 .

[0046] like Figure 2 , Figure 7 , Figure 8 The present invention also includes a main shaft 9, a heat conducting sheet 10, a rear end sealing plug 11, a synchronous wheel 12, a rotating sleeve 13, a connecting sleeve 14, and a heat dissipation fin 15; The main shaft 9 is located in the rotating tube 8, and the rotating tube 8 is coaxial with the main shaft 9. One end of the main shaft 9 passes through the rotating tube 8 and the middle connecting part 102, and the rotating sleeve 13 is sleeved on the part that passes through. The rear ends of the rotating tube 8 and the middle connecting part 102 are provided with a connecting hole for rotatingly connecting the rotating sleeve 13. The rotating sleeve 13 and the main shaft 9 are connected through splines and spline grooves. The rotating sleeve 13 is connected to the output end of the electric motor 19 through the synchronous wheel 12 and the belt, or the rotating sleeve 13 is connected to the electric motor 19 through a gear. The electric motor 19 is installed at the bottom of the middle connecting part 102. The rear end of the main shaft 9 passes through the rotating sleeve 13 and is fixedly connected to the heat dissipation fins 15. The rear end sealing plug 11 is sleeved on the main shaft 9. The rear end sealing plug 11 divides the interior of the rotating tube 8 into a front end chamber and a rear end chamber. The insulating heat-conducting liquid medium 18 is located in the front end chamber, and the rear end chamber is filled with air. The rear end chamber can be connected to the external environment through an air pipe or an air hole. A connecting sleeve 14 is sleeved on one end of the main shaft 9 that passes through the rotating sleeve 13. The connecting sleeve 14 and the main shaft 9 are threadedly connected, and the connecting sleeve 14 and the rotating sleeve 13 can be connected by bolts. A plurality of heat conducting plates 10 are arranged in the front end chamber, and the heat conducting plates 10 are fixedly connected to the main shaft 9. A limit strip 805 is fixedly connected to the inner wall surface of the rotating tube 8, and a card slot nested in the limit strip 805 is provided on the heat conducting plate 10.

[0047] The insulating heat-conducting liquid medium 18 can dissipate heat through the heat-conducting sheet 10, the main shaft 9, and the heat-dissipating fins 15, thereby reducing the connector temperature. By rotating the connecting sleeve 14, the length of the main shaft 9 inserted into the rotating tube 8 is adjusted, thereby adjusting the position of the rear end sealing plug 11 to change the size of the front end chamber and the rear end chamber, the purpose of which is to squeeze the front end chamber to eliminate bubbles when filling the insulating heat-conducting liquid medium 18.

[0048] Figure 1-Figure 8 One embodiment of the present invention is provided. In this embodiment, the first input cable 2, the second input cable 3, the first output cable 4, and the second output cable 5 are single-core cables.

[0049] Fig. 9 Another embodiment is given, in which the first input cable 2, the second input cable 3, the first output cable 4, and the second output cable 5 are multi-core cables, and multiple cores are arranged inside them, specifically: In the case of multi-core cables, the present invention further includes a connecting harness 21 and an insert 22; The rear ends of the first sliding iron core tube 203 and the second sliding iron core tube 303 are respectively connected with the connecting wire harness 21, and the rear ends of the two connecting wire harnesses 21 pass through the first rear end connecting iron core 204 and the second rear end connecting iron core 304 respectively and are connected to the first input cable 2 and the second input cable 3; the front ends of the two connecting wire harnesses 21 pass through the first middle insulating core 205 and the second middle insulating core 305 and are connected to the corresponding plug cores 22; there are multiple plug cores 22, which are connected to the multiple cores inside the first input cable 2 and the second input cable 3 in a one-to-one correspondence through the connecting wire harness 21; the rear ends of the first front end connecting iron core 206 and the second front end connecting iron core 306 are provided with core holes for plugging the plug cores 22, and the first front end connecting iron core 206 and the second front end connecting iron core 306 are provided with multiple connecting lines, and the multiple connecting lines, the multiple core holes, the multiple plug cores 22, the multiple connecting wire harnesses 21, and the multiple cores correspond to each other.

[0050] Multi-core jacks are provided at the front ends of the first front end connecting core 206 and the second front end connecting core 306 , and the multi-core jacks are used for plugging and cooperating with the plug 7 to realize multi-core transmission between the input cable and the output cable.

[0051] Taking the first input cable 2 as an example, the multiple wire cores inside the first input cable 2 pass through the first rear-end connecting iron core 204 and are connected to the multiple connecting wire harnesses 21 one by one, and the multiple connecting wire harnesses 21 can reserve elongation margins. In this embodiment, the first rear-end connecting iron core 204 is not connected to the first input cable 2 in circuit, and the first middle insulating core 205 is fixedly connected inside the first sliding iron core tube 203. The first sliding iron core tube 203 does not have a circuit connection with the first rear-end connecting iron core 204 and the first front-end connecting iron core 206, and the first middle insulating core 205 has a forward and backward movement stroke.

[0052] In this embodiment, the sliding iron core tube and the middle insulating core are slid to enable the insert core 22 to be plugged into or detached from the front end connecting iron core, thereby realizing the function of multi-line transmission through the front end connecting iron core.

[0053] The embodiments described above are only descriptions of the preferred modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A connector structure for rail transit, characterized in that: Including a socket end and a plug end; The socket end comprises an insulating housing (1), a first input cable (2), a second input cable (3), a first connecting mechanism, a second connecting mechanism and an intermediate conversion mechanism; The plug end comprises a first output cable (4), a second output cable (5), a fixing member (6) and a plug (7); The insulating housing (1) comprises a first cylindrical portion (101), an intermediate connecting portion (102) and a second cylindrical portion (103); The first connecting mechanism is arranged in the first cylindrical part (101), the intermediate conversion mechanism is arranged in the intermediate connecting part (102), and the second connecting mechanism is arranged in the second cylindrical part (103); the rear end of the first connecting mechanism is connected to the first input cable (2), and the rear end of the second connecting mechanism is connected to the second input cable (3); the front end of the first connecting mechanism is used to connect to the first output cable (4), and the front end of the second connecting mechanism is used to connect to the second output cable (5); The intermediate conversion mechanism connects the first connection mechanism and the second connection mechanism, and is used to disconnect one of the first connection mechanism and the second connection mechanism; so that the first input cable (2) is connected to the first output cable (4) or the second input cable (3) is connected to the second output cable (5).

2. A connector structure for rail transit according to claim 1, characterized in that: The first connection mechanism comprises a first insulating tube (201), a first sliding iron core tube (203), a first rear end connecting iron core (204), a first middle insulating core (205), a first front end connecting iron core (206), a first opening (209), and a first sliding block heat conducting block (210); The first insulating tube (201) is installed in the first cylindrical part (101); the first front end connecting iron core (206), the first middle insulating core (205) and the first rear end connecting iron core (204) are coaxial and arranged in sequence from front to back in the first insulating tube (201); the first sliding iron core tube (203) is sleeved on the first middle insulating core (205); the rear end of the first sliding iron core tube (203) is sleeved on the first rear end connecting iron core (204); the first cylindrical part (101) and the middle connecting part (102) are connected through the first opening part (209); the side of the first insulating tube (201) is provided with a through hole connected to the first opening part (209); the first sliding block heat conductive block (210) is slidably arranged in the first opening part (209); one end of the first sliding block heat conductive block (210) is fixedly connected to the side of the first sliding iron core tube (203), and the other end of the first sliding iron core tube (203) is connected to the intermediate conversion mechanism.

3. A connector structure for rail transit according to claim 2, characterized in that: The first connection mechanism further comprises a first insulating cushion layer (202), a first front-end crimping tube (207), a first rear-end crimping tube (208), a first heat-conducting frame (211) and a first rear-end plate (212); The first front end connecting iron core (206) is sleeved with the first front end pressing tube (207), and the first rear end connecting iron core (204) is sleeved with the first rear end pressing tube (208), and the first front end pressing tube (207) and the first rear end pressing tube (208) have the same outer diameter; The first insulating cushion layer (202) is provided on the inner wall surface of the first insulating tube (201), and the first insulating cushion layer (202) is sleeved on the first front end crimping tube (207) and the first rear end crimping tube (208); The first heat-conducting frame (211) is arranged in the first opening (209), the first heat-conducting frame (211) is a rectangular hollow structure, and the first sliding block heat-conducting block (210) is arranged in the first heat-conducting frame (211) so as to slide forward and backward; The first rear end plate (212) is mounted on the rear end surface of the first insulating tube (201), the first rear end plate (212) is fixedly connected to the rear end of the first rear end connecting iron core (204), and the first input cable (2) is connected to the first rear end plate (212).

4. A connector structure for rail transit according to claim 3, characterized in that: The second connecting mechanism has the same structure as the first connecting mechanism, and the second connecting mechanism and the first connecting mechanism are symmetrically distributed on both sides of the intermediate conversion mechanism; The second connection mechanism comprises a corresponding second insulating tube (301), a second insulating cushion layer (302), a second sliding iron core tube (303), a second rear end connecting iron core (304), a second middle insulating core (305), a second front end connecting iron core (306), a second front end crimping tube (307), a second rear end crimping tube (308), a second opening (309), a second slider heat conductive block (310), a second heat conductive frame (311) and a second rear end plate (312); the second rear end plate (312) is connected to the second input cable (3); The intermediate conversion mechanism is used to push the first slider heat conductive block (210) and the second slider heat conductive block (310) to move relative to each other, so that the first sliding iron core tube (203) and the second sliding iron core tube (303) move relative to each other, thereby connecting one of the first sliding iron core tube (203) and the second sliding iron core tube (303) to the corresponding front end connecting iron core.

5. A connector structure for rail transit according to claim 4, characterized in that: The intermediate conversion mechanism comprises a rotating tube (8), a first arc-shaped connecting plate (801) and a second arc-shaped connecting plate (802); The rotating tube (8) is rotatably arranged in the middle connecting portion (102), and the first arc-shaped connecting plate (801) and the second arc-shaped connecting plate (802) are respectively nested on the outer side of the rotating tube (8); the first arc-shaped connecting plate (801) is fixedly connected to one end of the first sliding block heat conducting block (210) passing through the first opening portion (209), and the second arc-shaped connecting plate (802) is fixedly connected to one end of the second sliding block heat conducting block (310) passing through the second opening portion (309); The rotating tube (8) is used to push the first arc-shaped connecting plate (801) and the second arc-shaped connecting plate (802) to move relative to each other when rotating, and the rotating tube (8) is connected to a driving device for driving the rotating tube (8) to rotate.

6. A connector structure for rail transit according to claim 5, characterized in that: A first spiral groove (803) and a second spiral groove (804) are provided on the outer side surface of the rotating tube (8); the spiral directions of the first spiral groove (803) and the second spiral groove (804) are opposite; the inner side surface of the first arc-shaped connecting plate (801) is fixedly connected to the first protrusion; the inner side surface of the second arc-shaped connecting plate (802) is fixedly connected to the second protrusion; the first protrusion and the second protrusion are respectively clamped in the first spiral groove (803) and the second spiral groove (804); the first spiral groove (803) and the second spiral groove (804) are used to push the first protrusion and the second protrusion to move relative to each other during rotation, thereby causing the first arc-shaped connecting plate (801) and the second arc-shaped connecting plate (802) to move relative to each other.

7. A connector structure for rail transit according to claim 5, characterized in that: The interior of the rotating tube (8) is filled with an insulating heat-conducting liquid medium (18); the front end of the rotating tube (8) is provided with an opening, the opening being rotatably connected to a fixed head (806), and the fixed head (806) is provided with a first detection mechanism (16) and a second detection mechanism (17); The first detection mechanism (16) and the second detection mechanism (17) are used to detect the expansion degree of the insulating heat-conducting liquid medium (18); when the expansion degree of the insulating heat-conducting liquid medium (18) reaches a threshold value, the driving device drives the rotating tube (8) to rotate, so that the first connecting mechanism and the second connecting mechanism switch between an on-off state.

8. A connector structure for rail transit according to claim 7, characterized in that: The first detection mechanism (16) comprises a first fixed tube (161), a first displacement detection component (162), a first plug-in tube (163), a first piston (164), a first hollow tube (165), a first elastic tube (166) and a first liquid medium (167); The first displacement detecting component (162) is fixedly connected to the first fixed tube (161), the first plug-in tube (163) is sleeved on the first fixed tube (161), the first plug-in tube (163) is fixedly connected to and passes through the fixed head (806), the first plug-in tube (163) is connected to the rotating tube (8), the first piston (164) is slidably arranged in the first plug-in tube (163), the first piston (164) is spaced from the first displacement detecting component (162), and the first piston (164) is spaced from the first displacement detecting component (162). a first hollow tube (165) is arranged between a displacement detection component (162), the first hollow tube (165) is fixedly connected to the outer side of the first plug-in tube (163), the first hollow tube (165) is in communication with the first plug-in tube (163), and the first elastic tube (166) is arranged inside the first plug-in tube (163); one end of the first elastic tube (166) is closed and the other end is open, the open end is fixedly connected to the first hollow tube (165), and the closed end is located at the opening of the first hollow tube (165) away from the first plug-in tube (163); A first compression chamber is formed inside the first plug-in tube (163), between the first piston (164) and the first fixed tube (161), and the first compression chamber is connected to the first hollow tube (165) and the first elastic tube (166); the first compression chamber, the first hollow tube (165) and the first elastic tube (166) are filled with the first liquid medium (167); The second detection mechanism (17) has the same structure as the first detection mechanism (16) and is symmetrically arranged. The second detection mechanism (17) comprises a corresponding second fixed tube (171), a second displacement detection component (172), a second plug tube (173), a second piston (174), a second hollow tube (175), a second elastic tube (176) and a second liquid medium (177); The inner side surfaces of the first arc-shaped connecting plate (801) and the second arc-shaped connecting plate (802) are respectively flush with the opening of the first hollow tube (165) and the opening of the second hollow tube (175); When the front end of the first sliding iron core tube (203) is sleeved on the first front end connecting iron core (206), the inner side surface of the first arc-shaped connecting plate (801) covers the opening of the first hollow tube (165); when the insulating heat-conducting liquid medium (18) expands to a threshold value, the second piston (174) is displaced to the maximum, the second elastic tube (176) is extended, and the driving device drives the rotating tube (8) to rotate, so that the first connecting mechanism is disconnected, the second connecting mechanism is connected, the second input cable (3) is connected with the second output cable (5), and the first input cable (2) is disconnected from the first output cable (4); When the front end of the second sliding iron core tube (303) is sleeved on the second front end connecting iron core (306), the inner side surface of the second arc-shaped connecting plate (802) covers the opening of the second hollow tube (175); when the insulating heat-conducting liquid medium (18) expands to a threshold value, the first piston (164) is displaced to the maximum, the first elastic tube (166) is extended, and the driving device drives the rotating tube (8) to rotate, so that the second connecting mechanism is disconnected and the first connecting mechanism is connected, the second input cable (3) is disconnected from the second output cable (5), and the first input cable (2) is connected to the first output cable (4).

9. A connector structure for rail transit according to claim 8, characterized in that: A front cover plate (20) is installed at the front end of the middle connecting portion (102), and the first fixing tube (161) and the second fixing tube (171) are fixed on the front cover plate (20).

10. A connector structure for rail transit according to claim 5, characterized in that: The driving device is an electric motor (19).

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