A cable wiring mechanism for a tunnel power system

Abstract

The present invention discloses a cable wiring mechanism for a tunnel power system, comprising: a wiring post, on which a wiring female head is provided; a male head housing, inside which an inner ring sleeve is provided; a movable ring sleeve and a threaded drive rod, the movable ring sleeve is axially slidably sleeved outside the male head housing, and the threaded drive rod is rotatably arranged on the male head housing and is in threaded cooperation with the movable ring sleeve. The cable wiring mechanism for the tunnel power system provided by the invention utilizes the movable ring sleeve to be coaxially fixed with the wiring female head in advance, rotates the threaded drive rod to make the male head housing slide axially close to the wiring female head, and further makes the contact head axially move close to and be inserted and matched in the contact groove to complete electrical connection, thereby avoiding the problem of radial impact between the contact head and the contact groove during the manual docking process, resulting in the generation of pits, and avoiding the problems of increased contact resistance and increased heat generation due to the generation of pits between the contact head and the contact groove.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel circuit construction, and in particular to a cable connection mechanism for a tunnel power system. Background Art

[0002] In closed spaces such as tunnels, leaky coaxial cables are often used for laying circuit systems. Leaky coaxial cables have two functions: transmission line and continuous antenna, thereby realizing wireless communication in tunnels. Cables in tunnels are often connected using cable connectors, that is, the male cable connector is plugged and fixed to the female connector on the terminal to complete the electrical connection.

[0003] According to publication number CN115864020A, publication (announcement) date: 2023.03.28, a coaxial cable joint and welding method for high-voltage transmission tunnels that are easy to internally weld and seal leakage are disclosed. The cable joint includes a first joint rear body, a second joint main body and a third joint main body; the welding method steps are: inserting the leaking coaxial cable into the cable joint; supplying power to the heating body so that the heating body completes the welding of the leaking coaxial cable and the coaxial cable joint; injecting sealing material into the cable joint through the welding processing hole; screwing the matching screw into the welding processing hole to seal the cable joint.

[0004] In the prior art including the above-mentioned patents, the cable connector at the end of the cable is used to make an electrical connection of the cable. When laying the circuit system in the tunnel, due to the thick diameter of the cable, it is often necessary to manually align the male head of the cable connector with the female head of the terminal to achieve electrical connection. However, due to the large diameter of the tunnel cable, manual handling, alignment and insertion of the cable connector can easily cause the contact points of the male and female heads to be non-axially close to each other, which can easily cause the contact points of the male and female heads to tilt and collide with each other, resulting in pit deformation and increasing the contact resistance between the cable connector and the terminal. The increase in contact resistance will inevitably lead to an increase in the heat generated by the cable connector. Summary of the invention

[0005] The object of the present invention is to provide a cable connection mechanism for a tunnel power system to solve the above-mentioned problems.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a cable connection mechanism for a tunnel power system, comprising a cable having a protruding copper core at the end thereof, and further comprising:

[0007] The terminal post is provided with a female terminal head, and the female terminal head is provided with a contact slot;

[0008] A male connector housing is provided with an inner ring sleeve therein, and the inner ring sleeve clamps the cable end so that the copper core coaxially contacts the inner side of the male connector housing;

[0009] The movable collar and the threaded drive rod, the movable collar is axially slidably sleeved outside the male head housing, and the threaded drive rod is rotatably arranged on the male head housing and is in threaded cooperation with the movable collar;

[0010] Wherein, after the movable collar is pre-fixed coaxially with the terminal block, the threaded drive rod is driven to rotate so that the contact head of the male head housing axially slides and approaches relative to the contact groove.

[0011] Preferably, a masking film for covering the contact head is provided at the first end of the movable collar, a movable inner cavity and an injection port communicating with the movable inner cavity are provided on the movable collar, and the following are provided in the movable inner cavity:

[0012] A winding wheel, which is rotatably arranged and fixedly connected to one end of the masking film;

[0013] A movable ring plate, which moves synchronously with the threaded drive rod to slide the piston in the movable inner cavity, and a communication hole communicating with the inner side of the first end of the movable collar is provided at the first end of the movable inner cavity;

[0014] Wherein, the movable ring plate is driven to slide the piston so that the winding wheel rotates to wind the masking film, and a negative pressure is generated in the communication hole.

[0015] Preferably, the inner collar is threadedly connected to the male head housing, the threaded coincidence position of the inner collar and the male head housing is the threaded connection part, and glue injection holes communicating with the threaded connection part are circumferentially arrayed on the male head housing. A ring-shaped groove is provided on the movable collar, and the glue injection holes are exposed through the ring-shaped groove in the default state of the movable collar. The male head housing is driven to slide so that the movable collar masks the glue injection holes.

[0016] Preferably, a turning plate is rotatably arranged in the glue injection hole, a limiting groove is provided on the inner collar, and the first end of the turning plate abuts against the end of the limiting groove in the default state to increase the gap at the threaded connection part. The male head housing is driven to slide so that the first end of the turning plate rotates away from the end of the limiting groove, and the first end of the turning plate squeezes the solid colloid in the glue injection hole to deform towards the threaded connection part.

[0017] Preferably, a flexible buffer is further provided on the inner ring surface of the movable collar, a flexible contact strip is provided on the turning plate, the male head housing is driven to slide so that the flexible buffer moves to contact the surface of the male head housing, and when the contact head is inserted into the contact groove, the flexible contact strip of the turning plate flips to the position where it abuts against the flexible buffer.

[0018] Preferably, a secondary communication channel for communicating the communication holes with each other is provided on the flexible buffer, and the first end of the flexible buffer extends into the movable inner cavity. When the male head housing is driven to slide so that the contact head is inserted into the contact groove, the movable ring plate moves to align with the flexible buffer, the glue injection hole and the flexible contact strip to clamp and block the secondary communication channel.

[0019] Preferably, a convex portion is linearly arrayed on the first end of the flexible buffer member, and a plurality of contact grooves are formed on the movable ring plate. The movable ring plate is driven by the piston to slide so that the contact grooves sequentially cross the convex portion to intermittently communicate and then block the secondary connecting channel, and the flexible buffer member is pressed to drive the turning plate to turn and vibrate on the side of the glue injection hole away from the threaded connection.

[0020] Preferably, the injection port is aligned with the flexible buffer member, and the movable ring plate, the flexible buffer member, and the flexible contact strip are all made of transparent materials.

[0021] Preferably, a plurality of threaded holes axially aligned with the threaded driving rod are formed in the wiring female head, and the male head housing is driven to slide so that the threaded driving rod moves close to the threaded hole and is threadedly installed in the threaded hole.

[0022] Preferably, a rack portion coupled to the winding wheel is provided on the movable ring plate, and a flexible end is provided at the end of the rack portion. The movable ring plate is driven by the piston to slide to drive the winding wheel to rotate through the rack portion, and the rack portion and the flexible end move and fit into the fitting groove formed in the wiring female head.

[0023] In the above technical solution, a cable wiring mechanism of a tunnel power system provided by the present invention has the following beneficial effects: By pre-fixing the movable ring sleeve coaxially with the wiring female head, rotating the threaded driving rod to axially move the male head housing closer to the wiring female head, and then axially moving the contact head closer to and plugging into the contact groove to complete the electrical connection, the problem of radial impact between the contact head and the contact groove during manual docking, resulting in pits, is avoided, and the problems of increased contact resistance and heat generation due to pits between the contact head and the contact groove are also avoided. Secondly, since the movable ring sleeve covers the outside of the connection between the wiring female head and the male head housing, the problem of large particle dust floating into the contact groove during docking, resulting in increased contact resistance, can be avoided. And the threaded driving rod can apply a positive pressure to the contact head relative to the contact groove, thereby further reducing the contact resistance between the contact groove and the male head housing and reducing the heat generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0026] Figure 2Schematic cross-sectional view of the overall horizontal structure provided by the embodiments of the present invention;

[0027] Figure 3 Schematic cross-sectional view of the overall vertical structure provided by the embodiments of the present invention;

[0028] Figure 4 Schematic cross-sectional view of the male housing, inner ring sleeve, threaded drive rod and cable provided by the embodiments of the present invention;

[0029] Figure 5 Schematic diagram of the structure when the male housing is connected to the terminal provided by the embodiments of the present invention;

[0030] Figure 6 Provided by the embodiments of the present invention Figure 2 Partial enlarged view at A in

[0031] Figure 7 Provided by the embodiments of the present invention Figure 2 Partial enlarged view at B in

[0032] Figure 8 Provided by the embodiments of the present invention Figure 3 Partial enlarged view at C in

[0033] Figure 9 Provided by the embodiments of the present invention Figure 3 Partial enlarged view at D in

[0034] Figure 10 Provided by the embodiments of the present invention Figure 4 Partial enlarged view at E in

[0035] Figure 11 Provided by the embodiments of the present invention Figure 5 Partial enlarged view at F in

[0036] Explanation of reference numerals:

[0037] 1. Terminal; 11. Female terminal; 111. Contact groove; 112. Threaded hole; 113. Fitting groove; 2. Cable; 21. Copper core; 31. Male housing; 311. Contact head; 312. Mounting portion; 313. Potting hole; 32. Inner ring sleeve; 321. Limit groove; 41. Movable ring sleeve; 411. Movable inner cavity; 412. Communication hole; 413. Concave arc groove; 414. Injection port; 415. Through hole; 416. Ring groove; 417. Winding groove; 418. Fixing groove; 42. Threaded drive rod; 421. Restriction portion; 43. Movable ring plate; 431. Rack portion; 432. Contact groove; 433. Flexible end; 5. Flipping plate; 51. Flexible contact strip; 6. Flexible buffer; 61. Secondary connection channel; 62. Protrusion; 7. Winding wheel; 8. Threaded connection; 91. Masking member; 92. Masking film; 93. Through hole. Detailed implementation manner

[0038] In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0039] As Figures 1 - 11 shown, a cable connection mechanism for a tunnel power system includes a cable 2 with a protruding copper core 21 at its end, and further includes:

[0040] A terminal 1, on which a female terminal 11 is provided, and a contact groove 111 is formed on the female terminal 11;

[0041] A male housing 31, inside which an inner ring sleeve 32 is provided, and the inner ring sleeve 32 clamps the end of the cable 2 so that the copper core 21 is coaxially abutted against the inner side of the male housing 31;

[0042] A movable ring sleeve 41 and a threaded drive rod 42, the movable ring sleeve 41 is axially slidably sleeved outside the male housing 31, and the threaded drive rod 42 is rotatably provided on the male housing 31 and is in threaded cooperation with the movable ring sleeve 41;

[0043] Wherein, after the movable ring sleeve 41 is pre-fixed coaxially with the female terminal 11, the threaded drive rod 42 is driven to rotate so that the contact head 311 of the male housing 31 axially slides closer relative to the contact groove 111.

[0044] Specifically, as Figure 2As shown in the figure, a contact groove 111 is formed on the female terminal head 11, and a contact head 311 is provided on the male head housing 31. When the contact head 311 is inserted and fitted into the contact groove 111, the male head housing 31 is electrically connected to the terminal post 1. The threaded drive rod 42 is rotatably arranged on the mounting portion 312 of the male head housing 31, and as Figure 1 shown, a plurality of through holes 93 are formed in the movable collar 41. In the default state of the movable collar 41, as Figure 4 shown, in the default state, the movable collar 41 is located at one end of its sliding stroke away from the male head housing 31. First, the inner collar 32 is clamped around the circumference of the end of the cable 2, and then the inner collar 32 is coaxially connected to the inside of the male head housing 31. At this time, the copper core 21 of the cable 2 abuts against the inside of the male head housing 31 and is welded and fixed, so that the copper core 21 is electrically connected to the contact head 311. At this time, the assembly operation of the male head housing 31, the inner collar 32 and the cable 2 has been completed.

[0045] When it is necessary to connect the cable 2 to the terminal post 1, first, the movable collar 41 and the female terminal head 11 are bolted and coaxially aligned through the through holes 93. At this time, the contact head 311 and the contact groove 111 are also coaxially aligned. Then, the threaded drive rod 42 is rotated so that the male head housing 31 slides closer relative to the movable collar 41. At this time, the male head housing 31 also slides axially closer relative to the female terminal head 11, so that the contact head 311 moves axially closer and is inserted and fitted into the contact groove 111 to complete the electrical connection, thus avoiding the problem of radial impact between the contact head 311 and the contact groove 111 during the manual docking process, resulting in pits, and avoiding the problems of increased contact resistance and increased heat generation due to the formation of pits between the contact head 311 and the contact groove 111. Secondly, since the movable collar 41 covers the outside of the connection between the female terminal head 11 and the male head housing 31, it can prevent large particle dust in the outside world from floating into the contact groove 111 during the docking process, resulting in an increase in contact resistance. And because the threaded drive rod 42 is used to make the contact head 311 move axially closer and abut against the contact groove 111, so that the threaded drive rod 42 can apply a positive pressure to the contact head 311 relative to the contact groove 111, thereby further reducing the contact resistance between the contact groove 111 and the male head housing 31 and reducing the heat generation.

[0046] Furthermore, as Figure 5 shown, sealing rings are provided at both ends of the movable collar 41. When the contact head 311 abuts against the contact groove 111 to complete the electrical connection between the female terminal head 11 and the male head housing 31, the sealing rings are respectively fitted into the female terminal head 11 and the male head housing 31 for sealing to prevent moisture or dust from invading the connection.

[0047] Furthermore, a plurality of threaded holes 112 axially aligned with the threaded drive rod 42 are formed in the female terminal head 11. The male head housing 31 is driven to slide so that the threaded drive rod 42 moves closer to the threaded holes 112 and is threadedly installed in the threaded holes 112. That is, a plurality of threaded holes 112 are formed in the female terminal head 11. When the threaded drive rod 42 is driven to rotate to drive the male head housing 31 to slide closer to the female terminal head 11, the threaded drive rod 42 and the male head housing 31 move closer to the female terminal head 11 synchronously. As the male head housing 31 gradually moves closer to the female terminal head 11, the end of the threaded drive rod 42 extends out of the outer side of the movable collar 41 through the through hole 415, so that the end of the threaded drive rod 42 is threadedly installed into the threaded holes 112 to improve the installation stability between the male head housing 31 and the female terminal head 11. The threaded holes 112 of the female terminal head 11 can be internally provided with rubber and threaded grooves to realize the installation cooperation between the threaded holes 112 and the threaded drive rod 42, so as to solve the problem that it is difficult to assemble between the threaded drive rod 42 and the threaded holes 112.

[0048] In the above technical solution, the movable collar 41 is pre-fixed coaxially with the female terminal head 11, and the threaded drive rod 42 is rotated to make the male head housing 31 slide axially closer to the female terminal head 11, so that the contact head 311 moves axially closer and is inserted and mated with the contact groove 111 to complete the electrical connection, thus avoiding the problem that radial impact occurs between the contact head 311 and the contact groove 111 during the manual docking process, resulting in pits, and avoiding the problems that the contact resistance becomes larger and the heat generation increases due to the generation of pits between the contact head 311 and the contact groove 111.

[0049] Secondly, since the movable collar 41 covers the outside of the connection between the female terminal head 11 and the male head housing 31, it can avoid the problem that large particle dust in the outside world drifts into the contact groove 111 during the docking process, resulting in an increase in contact resistance. And the threaded drive rod 42 can apply a positive pressure to the contact head 311 relative to the contact groove 111, thereby further reducing the contact resistance between the contact groove 111 and the male head housing 31 and reducing the heat generation.

[0050] As another embodiment provided by the present invention, a mask film 92 for covering the contact head 311 is provided at the first end of the movable collar 41. An activity inner cavity 411 and an injection port 414 communicating with the activity inner cavity 411 are formed in the movable collar 41. The following are arranged in the activity inner cavity 411:

[0051] A winding wheel 7, which is rotatably arranged and fixedly connected to one end of the mask film 92;

[0052] A movable ring plate 43, which moves synchronously with the threaded drive rod 42 and slides in the piston in the activity inner cavity 411, and a communication hole 412 communicating with the inner side of the first end of the movable collar 41 is formed at the first end of the activity inner cavity 411;

[0053] Among them, the movable ring plate 43 is driven by the piston to slide so that the winding wheel 7 rotates to wind the shielding film 92, and a negative pressure is generated in the communication hole 412.

[0054] Specifically, as Figure 4 shown, the end of the movable ring sleeve 41 facing away from the male head housing 31 is the first end, and the shielding film 92 is arranged at the first end of the movable ring sleeve 41 to shield the contact head 311 of the male head housing 31 to form a protection. The shielding film 92 is used to avoid the problems of dust accumulation or water vapor erosion on the contact head 311 due to improper storage or operation before the assembly of the male head housing 31. The winding wheel 7 is rotatably arranged in the movable inner cavity 411. One end of the shielding film 92 is fixedly connected to the winding wheel 7 through a winding groove 417 formed on the movable ring sleeve 41, and the other end of the shielding film 92 is fixedly connected to a fixing groove 418 formed on the first end of the movable ring sleeve 41.

[0055] As Figure 7 shown, the movable ring plate 43 is slidably arranged in the movable inner cavity 411. The movable ring plate 43 is kept in synchronous axial movement with the threaded drive rod 42 through a limiting portion 421 provided on the threaded drive rod 42, and the end of the movable inner cavity 411 close to the mounting portion 312 is the first end.

[0056] When connecting the male head housing 31 with the wiring female head 11, the dust adhered to the shielding film 92 should be cleaned first, and then the movable ring sleeve 41 is coaxially fixed with the wiring female head 11. Then the threaded drive rod 42 is rotated to move the male head housing 31 closer to the wiring female head 11. At this time, the movable ring plate 43 is driven to slide in the piston in the movable inner cavity 411. The movable ring plate 43 slides to drive the winding wheel 7 to rotate to break the shielding film 92 on the side close to the fixing groove 418, and the winding wheel 7 continuously rotates following the sliding of the movable ring plate 43 to pull and wind the shielding film 92 onto the winding wheel 7, and the movable ring plate 43 slides to generate a negative pressure suction force in the communication hole 412. Thus, before the installation of the male head housing 31, the contact head 311 is always shielded by the shielding film 92. Only when the movable ring sleeve 41 shields the wiring female head 11 and the male head housing, the shielding film 92 is broken and wound, further avoiding the problem that external dust falls between the contact head 311 and the contact groove 111 and causes an increase in contact resistance.

[0057] Secondly, by using the suction force generated on the communication hole 412, when the contact head 311 and the contact groove 111 move closer, the communication hole 412 further sucks out the dust scattered between the contact head 311 and the contact groove 111, and can also suck out and discharge the dust rolled up during the breaking and winding of the shielding film 92, thereby further avoiding the problem that the contact resistance between the contact head 311 and the contact groove 111 increases due to dust.

[0058] Furthermore, an arcuate recess 413 is formed on the inner side of the first end of the movable collar 41. When the male housing 31 is connected to the female terminal block 11, the arcuate recess 413 is located at the joint between the male housing 31 and the female terminal block 11. As shown in Figure 6 the figure, the injection port 414 can be used to inject sealant into the movable inner cavity 411, so that the sealant flows into the arcuate recess 413 along the communication hole 412 to further seal and reinforce the joint between the male housing 31 and the female terminal block 11.

[0059] Furthermore, a rack portion 431 coupled to the winding wheel 7 is provided on the movable ring plate 43. A flexible end 433 is provided at the end of the rack portion 431. The movable ring plate 43 is driven by the piston to drive the winding wheel 7 to rotate through the rack portion 431, and the rack portion 431 and the flexible end 433 are movably engaged in the engaging groove 113 formed in the female terminal block 11.

[0060] The rack portion 431 of the movable ring plate 43 is coupled to the winding wheel 7 so that the movable ring plate 43 can drive the winding wheel 7 to rotate during the sliding process. After the male housing 31 and the female terminal block 11 are close to complete the connection, the rack portion 431 and the flexible end 433 move and are embedded in the engaging groove 113 formed in the female terminal block 11, thereby further improving the radial stability of the connection between the male housing 31 and the female terminal block 11.

[0061] Furthermore, a masking member 91 for slidingly blocking the injection port 414 is provided on the movable collar 41.

[0062] As another embodiment provided by the present invention, the inner collar 32 is threadedly connected to the male housing 31. The threaded overlapping position of the inner collar 32 and the male housing 31 is the threaded connection portion 8. The male housing 31 is circumferentially and arrayedly provided with glue injection holes 313 communicating with the threaded connection portion 8. An annular groove 416 is formed in the movable collar 41. The glue injection holes 313 are exposed through the annular groove 416 in the default state of the movable collar 41. The male housing 31 is driven to slide so that the movable collar 41 masks the glue injection holes 313.

[0063] Specifically, as shown in Figure 4 the figure, the threaded overlapping position of the inner collar 32 and the male housing 31 is the threaded connection portion 8, and in Figure 10As shown, a number of glue injection holes 313 are formed in the inner ring sleeve 32. The glue injection holes 313 communicate with the side of the threaded connection 8 facing away from the end of the cable 2. When the movable ring sleeve 41 is in the default state and the inner ring sleeve 32 is threadedly connected to the male head housing 31, first, sealant is injected into the glue injection holes 313 through the annular groove 416, thereby completing the sealing and reinforcement of the threaded connection 8. Subsequently, the copper core 21 is welded to the male head housing 31. When the male head housing 31 slides to be electrically connected to the wiring female head 11, the movable ring sleeve 41 has slid relative to the male head housing 31 to shield the glue injection holes 313, thus avoiding the problem of the sealant in the glue injection holes 313 being exposed and quickly aging, and improving the sealing stability of the threaded connection 8.

[0064] As another embodiment provided by the present invention, a turning plate 5 is rotatably arranged in the glue injection hole 313. A limiting groove 321 is formed in the inner ring sleeve 32. In the default state, the first end of the turning plate 5 abuts against the end of the limiting groove 321 to increase the gap of the threaded connection 8. When the male head housing 31 is driven to slide, the first end of the turning plate 5 rotates away from the end of the limiting groove 321, and the first end of the turning plate 5 presses the solid colloid in the glue injection hole 313 to deform towards the side of the threaded connection 8.

[0065] Specifically, as Figure 10 shown, in the default state, the turning plate 5 is perpendicular to the axis direction of the male head housing 31. The end of the turning plate 5 close to the axis of the male head housing 31 is the first end. The limiting groove 321 of the inner ring sleeve 32 is located on the side of the threaded connection 8 facing away from the end of the cable 2. A turning plate 5 is arranged in the glue injection hole 313, and an elastic member for driving the turning plate 5 to reset to the default state is arranged in the glue injection hole 313. When the movable ring sleeve 41 is in the default state and the inner ring sleeve 32 is threadedly connected to the male head housing 31, the turning plate 5 is driven to turn to the default state so that the lower end of the turning plate 5 pushes against the limiting groove 321. At this time, the inner ring sleeve 32 is pushed by the turning plate 5 to move away from the end of the cable 2 to increase the gap between the threaded connections 8, thereby facilitating the sealant to flow into the threaded connections 8 and improving the sealing performance of the sealant for the threaded connections 8.

[0066] Subsequently, the copper core 21 is welded to the male housing 31. When the male housing 31 slides to be electrically connected to the female terminal 11, the upper end of the turning plate 5 extends out of the outside of the male housing 31. The movable ring sleeve 41 slides relative to the male housing 31 to shield the potting hole 313, and the movable ring sleeve 41 pushes against the upper end of the turning plate 5 to drive the turning plate 5 to turn. At this time, the lower end of the turning plate 5 turns and approaches the threaded connection 8, so that the first end of the turning plate 5 squeezes the solid colloid in the potting hole 313 to deform toward the threaded connection 8 side. That is, the lower end of the turning plate 5 applies an axial pressure to the inner ring sleeve 32 toward the end of the cable 2, thereby pressing the threaded connection 8 tightly to improve the sealing performance. And the turning plate 5 applies a positive pressure to the inner ring sleeve 32 to axially approach the male housing 31, thereby reducing the contact resistance between the copper core 21 and the male housing 31. The lower end of the turning plate 5 can also squeeze and deform the cured sealant in the potting hole 313 to extend to the outside of the potting hole 313, so that after installation, the male housing 31 is tightened in the movable ring sleeve 41 through the sealant in the potting hole 313, further improving the installation stability.

[0067] Among them, the elastic member that drives the turning plate 5 to reset to the default state can be replaced by a spring, a scroll spring or other elastic objects well-known to those skilled in the art such as an elastic plate.

[0068] As another embodiment provided by the present invention, it further includes a flexible buffer member 6 provided on the inner ring surface of the movable ring sleeve 41. A flexible contact strip 51 is provided on the turning plate 5. When the male housing 31 is driven to slide so that the flexible buffer member 6 moves to contact the surface of the male housing 31, and when the contact head 311 is inserted into the contact groove 111, the flexible contact strip 51 of the turning plate 5 turns to the position where it abuts against the flexible buffer member 6.

[0069] Specifically, as Figure 6 shown, the flexible buffer member 6 is provided on the inner ring surface of the movable ring sleeve 41. When the threaded drive rod 42 rotates to drive the male housing 31 to axially slide relative to the movable ring sleeve 41, the flexible buffer member 6 moves to contact the surface of the male housing 31, so as to use the contact between the flexible buffer member 6 and the male housing 31 to realize the deceleration of the relative axial movement between the movable ring sleeve 41 and the male housing 31 and the radial buffering of the male housing 31, further avoiding the problem that the contact head 311 of the male housing 31 is deformed by jitter impact.

[0070] A flexible contact strip 51 is provided on the flipping plate 5. In the default state of the flipping plate 5, the flexible contact strip 51 extends out of the outer side of the male head housing 31 inside the potting hole 313. When the male head housing 31 axially slides relative to the movable ring sleeve 41, at this time, the flipping plate 5 flips so that the flexible contact strip 51 extends into the outer side of the potting hole 313 to further decelerate the sliding of the male head housing 31. When the male head housing 31 completes the connection and installation with the female connection head 11, the flexible contact strip 51 abuts against the flexible buffer member 6 so that the flexible contact strip 51 and the flexible buffer member 6 abut against each other to jointly form an axial buffer for the male head housing 31, thereby reducing the vibration damage caused by the subsequent movement of the cable 2 to the male head housing 31.

[0071] As another embodiment provided by the present invention, a secondary connection channel 61 for communicating the communication holes 412 with each other is provided on the flexible buffer member 6, and the first end of the flexible buffer member 6 extends into the movable inner cavity 411. When the male head housing 31 is driven to slide so that the contact head 311 is inserted into the contact groove 111, the movable ring plate 43 moves to align with the flexible buffer member 6, the potting hole 313 and the flexible contact strip 51 to clamp and block the secondary connection channel 61.

[0072] Specifically, as Figure 11 shown, the secondary connection channel 61 of the flexible buffer member 6 communicates and is located in the middle of the communication hole 412, so as to realize that when the secondary connection channel 61 is blocked, the communication hole 412 is blocked, and when the secondary connection channel 61 communicates, the communication hole 412 communicates. The end of the flexible buffer member 6 facing away from the male head housing 31 is the first end, and the upper end of the flexible buffer member 6 extends into the movable inner cavity 411. When the male head housing 31 moves to contact the female connection head 11 to complete the electrical connection, sealant is injected into the male head housing 31 moving to the female connection head 11 through the injection port 414 and the communication hole 412. Then, the threaded drive rod 42 is further rotated to make the male head housing 31 move towards the female connection head 11 and press tightly with an axial fitting pressure. At this time, the movable ring plate 43 and the male head housing 31 move to align the movable ring plate 43, the flexible buffer member 6, the potting hole 313 and the flexible contact strip 51. At this time, the sealant deformed and bulged in the potting hole 313 abuts against the lower end of the flexible contact strip 51 and the flexible buffer member 6, and the movable ring plate 43 abuts against the upper end of the flexible buffer member 6, thereby clamping the flexible buffer member 6 to block the secondary connection channel 61. At this time, the sealant in a fluid state in the communication hole 412 near the concave arc groove 413 is blocked. When the sealant solidifies and expands, it is easy to expand towards the connection side of the male head housing 31 and the female connection head 11, thereby further improving the distribution uniformity and sealing performance of the sealant in the concave arc groove 413.

[0073] As yet another embodiment provided by the present invention, a convex portion 62 is linearly arrayed on the first end of the flexible buffer member 6, and a plurality of contact grooves 432 are formed on the movable ring plate 43. The movable ring plate 43 is driven by the piston to slide so that the contact grooves 432 sequentially cross over the convex portion 62 to intermittently communicate and then block the secondary connection channel 61, and the flexible buffer member 6 is pressed to drive the turning plate 5 to turn and shake on the side away from the threaded connection 8 within the glue injection hole 313.

[0074] Specifically, as Figure 6 and Figure 7 shown, the convex portion 62 of the flexible buffer member 6 is located within the movable inner cavity 411, and the contact grooves 432 of the movable ring plate 43 face the side of the convex portion 62. When the male head housing 31 is driven to slide and approach relative to the female terminal 11, the movable ring plate 43 moves synchronously with the male head housing 31 to slide within the movable inner cavity 411. At this time, the contact grooves 432 sequentially cross over the convex portion 62 to intermittently squeeze the flexible buffer member 6 through the movable ring plate 43, so that the secondary connection channel 61 is intermittently connected to the communication hole 412, that is, the flexible buffer member 6 is repeatedly clamped, causing the pressure within the communication hole 412 to change intermittently, thereby facilitating the discharge of air bubbles in the liquid sealant within the communication hole 412 and further improving the distribution uniformity of the sealant. After the male head housing 31 and the female terminal 11 are electrically connected and installed, some of the convex portions 62 abut within the contact grooves 432 to cause the movable ring plate 43 and the flexible buffer member 6 to be fitted together, thereby providing axial buffering between the movable ring sleeve 41 and the male head housing 31 and improving the connection service life of the male head housing 31 and the female terminal 11.

[0075] The flexible buffer member 6 is intermittently squeezed by the movable ring plate 43 to drive the turning plate 5 to turn and shake on the side away from the threaded connection 8 within the glue injection hole 313, so that the lower end of the turning plate 5 swings, that is, the lower end of the turning plate 5 repeatedly presses the sealant within the glue injection hole 313 to improve the sealing performance of the threaded connection 8; and the lower end of the turning plate 5 loosens the cured sealant on the side away from the threaded connection 8 within the limiting groove 321, thereby causing the sealant at the distal end of the threaded connection 8 of the inner ring sleeve 32 to loosen to generate a heat dissipation channel, avoiding the problem of low service life caused by hardening of the sealant due to the influence of the high temperature of the cable 2.

[0076] As yet another embodiment provided by the present invention, the injection port 414 is aligned with the flexible buffer member 6, and the movable ring plate 43, the flexible buffer member 6, and the flexible contact strip 51 are all made of transparent materials.

[0077] Specifically, as Figure 11As shown, when the male head housing 31 moves to contact the female terminal 11 to complete electrical connection, sealant is injected into the male head housing 31 moving to contact the female terminal 11 through the injection port 414 and the communication hole 412. Then, the threaded drive rod 42 is continuously rotated to make the male head housing 31 move towards the female terminal 11 and press closely with an axial fitting pressure. The contact groove 432 sequentially passes over the protrusion 62 and intermittently squeezes the flexible buffer 6 through the movable ring plate 43. The injection port 414, the movable ring plate 43, the flexible buffer 6, and the flexible contact strip 51 are all made of transparent materials, and the degree of air bubbles discharged from the liquid sealant in the communication hole 412 and the secondary communication channel 61 can be observed through the injection port 414, the movable ring plate 43, and the flexible buffer 6. When the electrical connection and installation of the male head housing 31 and the female terminal 11 are completed, although the potting hole 313 is blocked by the movable ring sleeve 41, the hardening condition of the sealant in the potting hole 313 can still be observed through the injection port 414, the movable ring plate 43, the flexible buffer 6, and the flexible contact strip 51, which is convenient for maintenance and installation inspection. Secondly, the flexible buffer 6, the flexible contact strip 51, and the sealant in the potting hole 313 are in contact with each other to generally form an axial buffer layer, thereby axially buffering the male head housing 31 after connection is completed and improving the connection service life of the male head housing 31 and the female terminal 11.

[0078] Working principle: First, the inner ring sleeve 32 is clamped around the circumference of the end of the cable 2. When the movable ring sleeve 41 is in the default state and the inner ring sleeve 32 is threadedly connected into the male head housing 31, the turning plate 5 is driven to turn to the default state so that the lower end of the turning plate 5 pushes against the limit groove 321. At this time, the inner ring sleeve 32 is pushed by the turning plate 5 and moves away from the end of the cable 2 to increase the gap between the threaded joints 8, so as to facilitate the sealant to flow into the gap between the threaded joints 8.

[0079] The copper core 21 is welded to the male head housing 31, and the dust adhered to the mask film 92 is cleaned. Subsequently, the movable ring sleeve 41 and the female terminal 11 are bolted and coaxially aligned through the through hole 93, and the threaded drive rod 42 is rotated to make the male head housing 31 slide and approach relative to the movable ring sleeve 41. At this time, the male head housing 31 also slides axially closer to the female terminal 11. The movable ring sleeve 41 slides relative to the male head housing 31 to shield the potting hole 313, and the movable ring sleeve 41 pushes against the upper end of the turning plate 5 to drive the turning plate 5 to turn. At this time, the lower end of the turning plate 5 turns and approaches the threaded joint 8 on one side to tightly press the threaded joint 8, and the cured sealant in the potting hole 313 is extruded and deformed to extend to the outside of the potting hole 313.

[0080] At this time, the movable ring plate 43 is driven to slide within the piston in the movable inner cavity 411. The movable ring plate 43 slides to drive the winding wheel 7 to rotate, so as to break the masking film 92 near the fixed groove 418. And the winding wheel 7 continuously rotates following the sliding of the movable ring plate 43 to pull and wind the masking film 92 onto the winding wheel 7. Moreover, the movable ring plate 43 slides to generate a negative pressure suction force in the communication hole 412. The flexible buffer 6 contacts the male head housing 31 to decelerate the relative axial movement between the movable ring sleeve 41 and the male head housing 31 and buffer the male head housing 31 radially;

[0081] When the male head housing 31 moves to contact the wiring female head 11 to complete the electrical connection, sealant is injected into the male head housing 31 moving to contact the wiring female head 11 through the injection port 414 and the communication hole 412. Then, the threaded drive rod 42 is continuously rotated to make the male head housing 31 move towards the wiring female head 11 and press closely with an axial fitting pressure. The movable ring plate 43 moves synchronously with the male head housing 31 and slides within the movable inner cavity 411. The contact groove 432 sequentially passes over the protrusion 62, and the flexible buffer 6 is intermittently squeezed by the movable ring plate 43, so that the secondary connection channel 61 is intermittently communicated with the communication hole 412, that is, the flexible buffer 6 is repeatedly clamped, causing the pressure in the communication hole 412 to change intermittently, thereby facilitating the discharge of air bubbles in the liquid sealant in the communication hole 412. And the flexible buffer 6 is intermittently squeezed by the movable ring plate 43 to drive the turning plate 5 to turn and shake on the side away from the threaded connection 8 within the glue injection hole 313, so as to repeatedly press the sealant in the glue injection hole 313, and a heat dissipation channel is generated due to the loosening of the sealant at the distal end of the threaded connection 8 of the inner ring sleeve 32;

[0082] After the male head housing 31 and the wiring female head 11 are connected with an axial fitting pressure, the injection port 414, the movable ring plate 43, the flexible buffer 6, the flexible contact strip 51 and the glue injection hole 313 are aligned.

[0083] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cable connection mechanism for a tunnel power system, comprising a cable (2) having a protruding copper core (21) at the end thereof, characterized in that: Also includes: A terminal post (1) is provided with a female terminal head (11), and a contact groove (111) is provided on the female terminal head (11); A male connector shell (31) is provided with an inner ring sleeve (32) therein, wherein the inner ring sleeve (32) clamps the end of the cable (2) so that the copper core (21) coaxially contacts the inner side of the male connector shell (31); A movable ring sleeve (41) and a threaded drive rod (42), wherein the movable ring sleeve (41) is axially slidably sleeved on the outside of the male head shell (31), and the threaded drive rod (42) is rotatably disposed on the male head shell (31) and threadably matched with the movable ring sleeve (41); Wherein, after the movable ring sleeve (41) is coaxially fixed with the female terminal (11) in advance, the threaded drive rod (42) is driven to rotate so that the contact head (311) of the male terminal housing (31) slides axially relative to the contact groove (111) and approaches; The first end of the movable ring sleeve (41) is provided with a mask film (92) for covering the contact head (311), the movable ring sleeve (41) is provided with an movable inner cavity (411) and an injection port (414) connected to the movable inner cavity (411), and the movable inner cavity (411) is provided with: A winding wheel (7) which is rotatably arranged and fixedly connected to one end of the mask film (92); A movable ring plate (43) moves synchronously with the threaded drive rod (42) to slide the piston in the movable inner cavity (411), and a connecting hole (412) connected to the inner side of the first end of the movable ring sleeve (41) is opened at the first end of the movable inner cavity (411); The movable ring plate (43) is driven by the piston to slide so that the reel (7) rotates to reel in the mask film (92), and negative pressure is generated in the communication hole (412); The inner ring sleeve (32) is threadedly connected to the male shell (31); the threaded overlap position of the inner ring sleeve (32) and the male shell (31) is a threaded connection (8); and a circumferential array of glue injection holes (313) connected to the threaded connection (8) is provided on the male shell (31); an annular groove (416) is provided on the movable ring sleeve (41); in a default state, the movable ring sleeve (41) exposes the glue injection holes (313) through the annular groove (416); and the male shell (31) is driven to slide so that the movable ring sleeve (41) covers the glue injection holes (313); A flip plate (5) is rotatably arranged in the glue injection hole (313), and a limiting groove (321) is provided on the inner ring sleeve (32). In a default state, the first end of the flip plate (5) abuts against the end of the limiting groove (321) so that the gap of the threaded connection (8) is increased, and the male head shell (31) is driven to slide so that the first end of the flip plate (5) rotates away from the end of the limiting groove (321), and the first end of the flip plate (5) squeezes the solid colloid in the glue injection hole (313) to deform toward one side of the threaded connection (8).

2. A cable connection mechanism for a tunnel power system according to claim 1, characterized in that: The invention also comprises a flexible buffer (6) arranged on the inner ring surface of the movable ring sleeve (41); a flexible contact strip (51) is arranged on the flip plate (5); the male head shell (31) is driven to slide so that the flexible buffer (6) moves to contact the surface of the male head shell (31); and when the contact head (311) is plugged into the contact groove (111), the flexible contact strip (51) of the flip plate (5) flips to a position abutting against the flexible buffer (6).

3. The cable connection mechanism of a tunnel power system according to claim 2, characterized in that: The flexible buffer (6) is provided with a secondary connection channel (61) for connecting the connecting holes (412) to each other, and the first end of the flexible buffer (6) extends into the movable inner cavity (411). When the male head shell (31) is driven to slide so that the contact head (311) is plugged into the contact groove (111), the movable ring plate (43) moves to align with the flexible buffer (6), the glue injection hole (313) and the flexible contact strip (51) to clamp and block the secondary connection channel (61).

4. A cable connection mechanism for a tunnel power system according to claim 3, characterized in that: A linear array of protrusions (62) is provided on the first end of the flexible buffer (6), and a plurality of contact grooves (432) are provided on the movable ring plate (43). The movable ring plate (43) is driven by the piston to slide so that the contact grooves (432) sequentially pass over the protrusions (62) to allow the secondary connecting channel (61) to be intermittently connected and then blocked, and the flexible buffer (6) is pressed to drive the flip plate (5) located in the glue injection hole (313) to flip and shake on the side away from the threaded connection (8).

5. The cable connection mechanism of a tunnel power system according to claim 4, characterized in that: The injection port (414) is aligned with the flexible buffer (6), and the movable ring plate (43), the flexible buffer (6) and the flexible contact strip (51) are all made of transparent material.

6. The cable connection mechanism of a tunnel power system according to claim 1, characterized in that: The female terminal (11) is provided with a plurality of threaded holes (112) axially aligned with the threaded drive rod (42), and the male terminal housing (31) is driven to slide so that the threaded drive rod (42) moves close to the threaded hole (112) and is threadedly installed in the threaded hole (112).

7. The cable connection mechanism of a tunnel power system according to claim 1, characterized in that: The movable ring plate (43) is provided with a rack portion (431) coupled to the winding wheel (7), and a flexible end head (433) is provided at the end of the rack portion (431). The movable ring plate (43) is driven by the piston to slide to drive the winding wheel (7) to rotate through the rack portion (431), and the rack portion (431) and the flexible end head (433) are movable and engaged in an engagement groove (113) provided in the female terminal (11).

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