Cable wiring mechanism of tunnel power system

Abstract

The invention discloses a cable wiring mechanism for a tunnel electric power system, and the mechanism comprises a binding post which is provided with a wiring female head; an inner ring sleeve is arranged in the male head shell; the movable ring sleeve is axially arranged on the outer side of the male head shell in a sliding and sleeving mode, and the threaded driving rod is rotationally arranged on the male head shell and is in threaded fit with the movable ring sleeve. According to the cable wiring mechanism of the tunnel power system, the movable ring sleeve is coaxially fixed to the wiring female head in advance, the threaded driving rod is rotated to enable the male head shell to slide relative to the wiring female head to axially approach, and then the contact head axially moves to approach and is inserted and matched in the contact groove to complete electrical connection; therefore, the problem that pits are generated due to radial impact between the contact head and the contact groove in the manual butt joint process is solved, and the problems that contact resistance is increased and heat is increased due to the fact that the pits are generated between the contact head and the contact groove are solved.

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: The terminal post is provided with a female terminal head, and the female terminal head is provided with a contact slot; 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; A movable ring sleeve and a threaded drive rod, wherein the movable ring sleeve is axially slidably sleeved on the outer side of the male head shell, and the threaded drive rod is rotatably arranged on the male head shell and is matched with the thread of the movable ring sleeve; Among them, after the movable ring sleeve is coaxially fixed with the female terminal in advance, the threaded drive rod is driven to rotate so that the contact head of the male terminal housing slides axially relative to the contact groove and approaches.

[0007] Preferably, a mask film for covering the contact head is disposed at the first end of the movable ring sleeve, and an movable inner cavity and an injection port connected to the movable inner cavity are opened on the movable ring sleeve, and the movable inner cavity is provided with: A winding wheel, which is rotatably arranged and fixedly connected to one end of the mask film; A movable ring plate moves synchronously with the threaded drive rod to slide the piston in the movable inner cavity, and a connecting hole connected to the inner side of the first end of the movable ring sleeve is opened at the first end of the movable inner cavity; The movable ring plate is driven by the piston to slide so that the reel rotates to reel in the mask film, and negative pressure is generated in the communicating hole.

[0008] Preferably, the inner ring sleeve is threadedly connected to the male shell, the overlapping position of the threads of the inner ring sleeve and the male shell is the threaded connection, and a circular array of glue holes connected to the threaded connection is provided on the male shell, and an annular groove is provided on the movable ring sleeve. In the default state, the movable ring sleeve exposes the glue filling holes through the annular groove, and the male shell is driven to slide so that the movable ring sleeve covers the glue filling holes.

[0009] Preferably, a flip plate is rotatably arranged in the glue filling hole, and a limiting groove is provided on the inner ring sleeve. In a default state, the first end of the flip plate abuts against the end of the limiting groove to increase the gap at the threaded connection, and the male head shell is driven to slide so that the first end of the flip plate rotates away from the end of the limiting groove, and the first end of the flip plate squeezes the solid colloid in the glue filling hole to deform toward one side of the threaded connection.

[0010] Preferably, it also includes a flexible buffer arranged on the inner surface of the movable ring sleeve, and a flexible contact strip is arranged on the flip plate. The male head shell is driven to slide so that the flexible buffer moves to contact the surface of the male head shell, and when the contact head is plugged into the contact slot, the flexible contact strip of the flip plate flips to a position abutting the flexible buffer.

[0011] Preferably, the flexible buffer is provided with a secondary connecting channel for connecting the connecting holes to each other, and the first end of the flexible buffer extends into the movable inner cavity. When the male head shell is driven to slide so that the contact head is plugged into the contact groove, the movable ring plate moves to align with the flexible buffer, the glue filling hole and the flexible contact strip to clamp and block the secondary connecting channel.

[0012] Preferably, a linear array of protrusions is provided on the first end of the flexible buffer, and a plurality of contact grooves are opened on the movable ring plate. The movable ring plate is driven by the piston to slide so that the contact grooves successively pass over the protrusions to intermittently connect the secondary connecting channels and then seal them, and the flexible buffer is driven by pressure to cause the flip plate located in the glue filling hole away from the threaded connection to flip and shake.

[0013] Preferably, the injection port is aligned with the flexible buffer, and the movable ring plate, the flexible buffer and the flexible contact strip are all made of transparent material.

[0014] Preferably, the female terminal is provided with a plurality of threaded holes aligned axially with the threaded drive rod, and the male terminal housing is driven to slide so that the threaded drive rod moves close to the threaded hole and is threadedly installed in the threaded hole.

[0015] Preferably, the movable ring plate is provided with a rack portion coupled to the winding wheel, 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 are moved and engaged in the engagement groove opened in the female terminal.

[0016] In the above technical scheme, the cable connection mechanism of a tunnel power system provided by the present invention has the following beneficial effects: the movable ring sleeve is pre-coaxially fixed with the female terminal, and the threaded drive rod is rotated to make the male head shell slide axially close relative to the female terminal, so that the contact head moves axially close and plugs into the contact groove to complete the electrical connection, thereby avoiding the problem of radial impact between the contact head and the contact groove during manual docking to cause pits, and avoiding the problem of contact resistance increasing and heat generation increasing due to pits between the contact head and the contact groove. Secondly, since the movable ring sleeve cover is arranged on the outside of the connection between the female terminal and the male head shell, it can avoid the problem of large particles of dust from the outside floating into the contact groove during docking, which causes the contact resistance to increase. And the threaded drive rod can apply 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 shell and reducing the heat generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 A schematic cross-sectional view of the overall horizontal structure provided by an embodiment of the present invention; Figure 3 A schematic cross-sectional view of the overall horizontal and vertical structure provided by an embodiment of the present invention; Figure 4 A schematic cross-sectional view of the structure of a male housing, an inner ring sleeve, a threaded drive rod and a cable provided in an embodiment of the present invention; Figure 5 A schematic diagram of the structure when the male housing and the terminal post provided in the embodiment of the present invention are connected; Figure 6 The embodiment of the present invention provides Figure 2 A local enlarged schematic diagram of the middle A; Figure 7 The embodiment of the present invention provides Figure 2 A partial enlarged schematic diagram of point B in the middle; Figure 8 The embodiment of the present invention provides Figure 3 A partial enlarged schematic diagram of point C in the middle; Fig. 9 The embodiment of the present invention provides Figure 3 A partial enlarged schematic diagram of point D in the middle; Fig.10 The embodiment of the present invention provides Figure 4 A partial enlarged schematic diagram of point E in the middle; Fig.11 The embodiment of the present invention provides Figure 5 A partial enlarged schematic diagram of point F in the middle.

[0019] Description of reference numerals: 1. Terminal post; 11. Female terminal; 111. Contact slot; 112. Threaded hole; 113. Fitting slot; 2. Cable; 21. Copper core; 31. Male terminal housing; 311. Contact head; 312. Mounting part; 313. Glue filling hole; 32. Inner ring sleeve; 321. Limiting slot; 41. Active ring sleeve; 411. Active inner cavity; 412. Connecting hole; 413. Concave arc slot; 414. Injection port; 415. Extension hole; 41 6. Annular groove; 417. Winding groove; 418. Fixed groove; 42. Threaded drive rod; 421. Limiting portion; 43. Movable ring plate; 431. Rack portion; 432. Contact groove; 433. Flexible end; 5. Flip plate; 51. Flexible contact strip; 6. Flexible buffer; 61. Secondary connecting channel; 62. Raised portion; 7. Winding wheel; 8. Threaded connection; 91. Mask member; 92. Mask film; 93. Through hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0021] like Figure 1-11 As shown, a cable connection mechanism for a tunnel power system includes a cable 2, the end of which has a protruding copper core 21, and also includes: A terminal post 1 is provided with a female terminal head 11, and a contact slot 111 is provided on the female terminal head 11; A male connector housing 31 is provided with an inner ring sleeve 32 therein, and 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 housing 31; A movable ring sleeve 41 and a threaded driving rod 42, wherein the movable ring sleeve 41 is axially slidably sleeved on the outer side of the male housing 31, and the threaded driving rod 42 is rotatably disposed on the male housing 31 and threadably matched with the movable ring sleeve 41; After the movable ring sleeve 41 is coaxially fixed with the female terminal 11 in advance, the threaded driving 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.

[0022] Specifically, Figure 2 As shown, the female terminal 11 is provided with a contact slot 111, and the male terminal housing 31 is provided with a contact head 311. When the contact head 311 is plugged into the contact slot 111, the male terminal housing 31 and the terminal post 1 are electrically connected, and the threaded drive rod 42 is rotatably provided on the mounting portion 312 of the male terminal housing 31. Figure 1 The movable ring sleeve 41 is provided with a plurality of through holes 93. The movable ring sleeve 41 is in a default state. Figure 4 As shown, the movable ring sleeve 41 is located at the end of the sliding stroke facing away from the male connector housing 31 in the default state. First, the inner ring sleeve 32 is set around the end of the cable 2, and then the inner ring sleeve 32 is coaxially connected to the male connector housing 31. At this time, the copper core 21 of the cable 2 is against the inner side of the male connector 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 of the male connector housing 31, the inner ring sleeve 32 and the cable 2 is completed.

[0023] When the cable 2 needs to be connected to the terminal 1, firstly, the movable ring sleeve 41 is bolted and coaxially aligned with the female terminal 11 through the through hole 93, and the contact head 311 is also coaxially aligned with the contact slot 111, and then the threaded drive rod 42 is rotated to make the male head shell 31 slide closer to the movable ring sleeve 41, and the male head shell 31 also slides axially closer to the female terminal 11, so that the contact head 311 moves axially closer and plugs into the contact slot 111 to complete the electrical connection, thereby avoiding the problem of radial collision between the contact head 311 and the contact slot 111 during manual docking, resulting in pits, and avoiding the problem of increased contact resistance and increased heat generation due to pits between the contact head 311 and the contact slot 111. Secondly, because the movable ring sleeve 41 is covered on the outside of the connection between the female terminal 11 and the male head shell 31, it can avoid the problem of large particles of dust from the outside floating into the contact slot 111 during docking, resulting in increased contact resistance. Furthermore, since a threaded drive rod 42 is used to move the contact head 311 axially toward and abut against the contact groove 111, the threaded drive rod 42 can apply a positive pressure relative to the contact groove 111 to the contact head 311, thereby further reducing the contact resistance between the contact groove 111 and the male head housing 31 and reducing heat generation.

[0024] Further, such as Figure 5 As shown, sealing rings are provided at both ends of the movable ring sleeve 41. When the contact head 311 abuts against the contact groove 111 to complete the electrical connection between the female terminal 11 and the male terminal shell 31, the sealing rings are respectively embedded in the female terminal 11 and the male terminal shell 31 to seal and prevent moisture or dust from invading the connection.

[0025] Furthermore, the female terminal 11 is provided with a plurality of threaded holes 112 axially aligned with the threaded drive rod 42, and the male 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. That is, the female terminal 11 is provided with a plurality of threaded holes 112, and when the threaded drive rod 42 is driven to rotate so as to drive the male housing 31 to slide close relative to the female terminal 11, the threaded drive rod 42 and the male housing 31 move synchronously close to the female terminal 11, and as the male housing 31 gradually moves close to the female terminal 11, the end of the threaded drive rod 42 extends out of the outside of the movable ring sleeve 41 through the extension hole 415, so that the end of the threaded drive rod 42 is threadedly installed into the threaded hole 112 to improve the installation stability between the male housing 31 and the female terminal 11. The threaded hole 112 of the female terminal 11 may be provided with internal rubber and a threaded groove to achieve installation cooperation between the threaded hole 112 and the threaded driving rod 42 , so as to solve the problem that the threaded driving rod 42 and the threaded hole 112 are difficult to assemble.

[0026] In the above technical solution, the movable ring sleeve 41 is pre-fixed coaxially with the female terminal 11, and the threaded drive rod 42 is rotated to make the male head housing 31 slide axially closer relative to the female terminal 11, so that the contact head 311 moves axially closer and plugs into the contact groove 111 to complete the electrical connection, thereby avoiding the problem of radial impact between the contact head 311 and the contact groove 111 during manual docking to cause pits, and avoiding the problem of increased contact resistance and increased heat generation due to the pits between the contact head 311 and the contact groove 111.

[0027] Secondly, since the movable ring sleeve 41 is arranged outside the connection between the female terminal 11 and the male terminal shell 31, it can prevent large dust particles from floating into the contact groove 111 during the docking process, thereby increasing the contact resistance. In addition, the threaded drive rod 42 can apply a positive pressure relative to the contact groove 111 to the contact head 311, thereby further reducing the contact resistance between the contact groove 111 and the male terminal shell 31 and reducing the heat generation.

[0028] 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 ring sleeve 41, and an movable inner cavity 411 and an injection port 414 connected to the movable inner cavity 411 are provided on the movable ring sleeve 41, 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; The movable ring plate 43 moves synchronously with the threaded driving rod 42 to slide the piston in the movable inner cavity 411, and the first end of the movable inner cavity 411 is provided with a connecting hole 412 connected to the inner side of the first end of the movable ring sleeve 41; 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 communicating hole 412 .

[0029] Specifically, Figure 4 As shown, the end of the movable ring sleeve 41 facing away from the male shell 31 is the first end, and the mask film 92 is arranged at the first end of the movable ring sleeve 41 to mask the contact head 311 of the male shell 31 for protection. The mask film 92 is used to avoid dust accumulation or water vapor erosion on the contact head 311 due to improper storage or operation before the male shell 31 is assembled, and the winding wheel 7 is rotatably arranged in the movable inner cavity 411, and one end of the mask film 92 is fixedly connected to the winding wheel 7 through the winding groove 417 opened on the movable ring sleeve 41, and the other end of the mask film 92 is fixedly connected to the fixing groove 418 opened on the first end of the movable ring sleeve 41.

[0030] like Figure 7As shown, the movable ring plate 43 is piston-slidably disposed in the movable inner cavity 411, and the movable ring plate 43 maintains synchronous axial movement with the threaded drive rod 42 through the limiting portion 421 disposed 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.

[0031] When the male shell 31 is connected to the female terminal 11, the dust adhering to the mask film 92 should be cleaned first, and then the movable ring sleeve 41 and the female terminal 11 are coaxially fixed, and then the threaded drive rod 42 is rotated to move the male shell 31 closer to the female terminal 11. At this time, the movable ring plate 43 is driven by the piston in the movable inner cavity 411 to slide, and the movable ring plate 43 slides to drive the winding wheel 7 to rotate to break the mask film 92 close to the fixed groove 418, and the winding wheel 7 continues to rotate following the sliding of the movable ring plate 43 to pull the mask film 92 and wind it on the winding wheel 7, and the movable ring plate 43 slides to generate negative pressure suction in the connecting hole 412. As a result, before the male connector shell 31 is installed, the contact head 311 is always shielded by the masking film 92. Only when the movable ring sleeve 41 covers the outside of the female connector 11 and the male connector shell, the masking film 92 is torn off and rolled up, further avoiding the problem of increased contact resistance caused by external dust falling between the contact head 311 and the contact slot 111.

[0032] Secondly, by utilizing the suction force generated on the connecting hole 412, when the contact head 311 and the contact slot 111 move closer, the connecting hole 412 further sucks out the dust floating between the contact head 311 and the contact slot 111, and can also suck out the dust rolled up during the breakage and winding of the mask film 92, thereby further avoiding the problem of increased contact resistance between the contact head 311 and the contact slot 111 due to dust.

[0033] Furthermore, a concave arc groove 413 is provided on the inner side of the first end of the movable ring sleeve 41. When the male connector housing 31 and the female connector 11 are connected, the concave arc groove 413 is located at the joint between the male connector housing 31 and the female connector 11. Figure 6 As shown, the injection port 414 can be used to inject sealant into the active inner cavity 411 , so that the sealant flows into the concave arc groove 413 along the connecting hole 412 to further seal and reinforce the joint between the head shell 31 and the female terminal 11 .

[0034] Furthermore, a rack portion 431 coupled to the winding wheel 7 is provided on the movable ring plate 43, and 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 slide to drive the winding wheel 7 to rotate through the rack portion 431, and the rack portion 431 and the flexible end 433 are moved and engaged in the engagement groove 113 opened in the female terminal 11.

[0035] 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. When the male head shell 31 and the female terminal 11 are close to complete the connection, the rack portion 431 and the flexible end 433 move and embed into the fitting groove 113 opened in the female terminal 11, thereby further improving the radial stability of the connection between the male head shell 31 and the female terminal 11.

[0036] Furthermore, a mask member 91 for slidably blocking the injection port 414 is disposed on the movable ring sleeve 41 .

[0037] As another embodiment provided by the present invention, the inner ring sleeve 32 is threadedly connected to the male shell 31, and the threaded overlapping position of the inner ring sleeve 32 and the male shell 31 is the threaded connection 8, and a circular array of glue holes 313 connected to the threaded connection 8 are opened on the male shell 31, and an annular groove 416 is opened on the movable ring sleeve 41. In the default state, the movable ring sleeve 41 exposes the glue filling 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 filling holes 313.

[0038] Specifically, Figure 4 As shown, the threaded joint 8 is formed at the position where the inner ring sleeve 32 and the male housing 31 overlap with each other. Fig.10 As shown, a plurality of glue injection holes 313 are provided on the inner ring sleeve 32, and the glue injection holes 313 are connected to 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 shell 31, the sealant is first injected into the glue injection hole 313 through the annular groove 416 to complete the sealing reinforcement of the threaded connection 8, and then the copper core 21 is welded to the male head shell 31. When the male head shell 31 slides to be electrically connected to the female terminal 11, the movable ring sleeve 41 has slid relative to the male head shell 31 to cover the glue injection hole 313, thereby avoiding the problem of the sealant in the glue injection hole 313 being exposed and aging quickly, thereby improving the sealing stability of the threaded connection 8.

[0039] As another embodiment provided by the present invention, 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 the default state, the first end of the flip plate 5 abuts against the end of the limiting groove 321 to increase the gap at the threaded connection 8, 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 the side of the threaded connection 8.

[0040] Specifically, Fig.10As shown, the flip plate 5 is perpendicular to the axial direction of the male shell 31 in the default state, and the end of the flip plate 5 close to the axis of the male shell 31 is the first end. The limit 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, and the flip plate 5 is arranged in the glue injection hole 313, and the glue injection hole 313 is provided with an elastic member for driving the flip plate 5 to reset to the default state. When the movable ring sleeve 41 is in the default state and the inner ring sleeve 32 is threadedly connected to the male shell 31, the flip plate 5 is driven to flip and is in the default state so that the lower end of the flip plate 5 pushes the limit groove 321. At this time, the inner ring sleeve 32 is pushed by the flip plate 5 and moves away from the end of the cable 2 to increase the gap between the threaded connections 8, thereby facilitating the flow of sealant into the threaded connections 8 and improving the sealing of the sealant to the threaded connections 8.

[0041] Then, the copper core 21 is welded to the male shell 31, and when the male shell 31 slides to be electrically connected to the female terminal 11, the upper end of the flip plate 5 extends out of the outer side of the male shell 31, and the movable ring sleeve 41 slides relative to the male shell 31 to cover the glue injection hole 313, and the movable ring sleeve 41 pushes against the upper end of the flip plate 5 to drive the flip plate 5 to flip, and at this time, the lower end of the flip plate 5 flips toward the threaded connection 8, so that the first end of the flip plate 5 squeezes the solid colloid in the glue injection hole 313 to deform toward the threaded connection 8, that is, the lower end of the flip plate 5 is inward. The annular sleeve 32 applies axial pressure to one side of the end of the cable 2, thereby tightening the threaded connection 8 to improve the sealing performance, and the flip plate 5 applies positive pressure to the inner annular sleeve 32 axially close to the male shell 31, thereby reducing the contact resistance between the copper core 21 and the male shell 31. The lower end of the flip plate 5 can also extrude and deform the solidified sealant in the glue injection hole 313 to extend it to the outside of the glue injection hole 313, so that the male shell 31 is expanded and tightened in the movable annular sleeve 41 through the sealant in the glue injection hole 313 after installation, further improving the installation stability.

[0042] The elastic member that drives the flip plate 5 to return to the default state can be replaced by a spring, a spiral spring or other elastic objects known to those skilled in the art.

[0043] As another embodiment provided by the present invention, it also includes a flexible buffer 6 arranged on the inner ring surface of the movable ring sleeve 41, and 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 the flexible buffer 6.

[0044] Specifically, Figure 6As shown, the flexible buffer 6 is arranged on the inner ring surface of the movable ring sleeve 41. When the threaded drive rod 42 rotates to drive the male shell 31 to slide axially relative to the movable ring sleeve 41, the flexible buffer 6 moves to contact the surface of the male shell 31, so as to utilize the contact between the flexible buffer 6 and the male shell 31 to achieve the deceleration of the relative axial movement between the movable ring sleeve 41 and the male shell 31 and radial buffering of the male shell 31, thereby further avoiding the problem of the contact head 311 of the male shell 31 being deformed by shaking and impact.

[0045] A flexible contact strip 51 is provided on the flip plate 5. In the default state, the flexible contact strip 51 is located inside the glue filling hole 313 and extends out of the outside of the male shell 31. When the male shell 31 slides axially relative to the movable ring sleeve 41, the flip plate 5 flips over so that the flexible contact strip 51 extends into the outside of the glue filling hole 313 to further slow down the sliding of the male shell 31. When the male shell 31 completes the connection and installation with the female terminal 11, the flexible contact strip 51 abuts against the flexible buffer 6 so that the flexible contact strip 51 and the flexible buffer 6 abut against each other to form an axial buffer for the male shell 31, thereby reducing the vibration damage to the male shell 31 caused by the subsequent movement of the cable 2.

[0046] As another embodiment provided by the present invention, a secondary connecting channel 61 for connecting the connecting holes 412 to each other is provided on the flexible buffer 6, 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 connecting channel 61.

[0047] Specifically, Fig.11As shown, the secondary connecting channel 61 of the flexible buffer 6 is connected and located in the middle of the connecting hole 412, so that the connecting hole 412 is blocked when the secondary connecting channel 61 is blocked, and the connecting hole 412 is connected when the secondary connecting channel 61 is connected. The end of the flexible buffer 6 facing away from the male head shell 31 is the first end, and the upper end of the flexible buffer 6 extends into the active inner cavity 411. When the male head shell 31 moves to contact with the female terminal 11 to complete the electrical connection, the sealant is injected into the male head shell 31 through the injection port 414 and the connecting hole 412 until it moves to the female terminal 11, and then the threaded drive rod 42 is continuously rotated to make the male head shell 31 move toward the female terminal 11 and close to it with axial fitting pressure. , the movable ring plate 43 and the male head shell 31 move to the movable ring plate 43, the flexible buffer 6, the glue injection hole 313 and the flexible contact strip 51 are aligned. At this time, the sealant in the glue injection hole 313 that is squeezed and deformed and bulged and contacts the lower end of the flexible buffer 6 with the flexible contact strip 51, and the movable ring plate 43 contacts the upper end of the flexible buffer 6, and then clamps the flexible buffer 6 to seal the secondary connection channel 61. At this time, the fluid sealant in the connecting hole 412 close to the concave arc groove 413 is blocked, and when the sealant solidifies and expands, it is easy to expand toward the side of the connection between the male head shell 31 and the female terminal 11, thereby further improving the distribution uniformity and sealing of the sealant in the concave arc groove 413.

[0048] As another embodiment provided by the present invention, 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 successively pass over the protrusions 62 to intermittently connect the secondary connecting channel 61 and then seal it, 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.

[0049] Specifically, Figure 6 and Figure 7As shown, the raised portion 62 of the flexible buffer 6 is located in the movable inner cavity 411, and the contact groove 432 of the movable ring plate 43 is toward the side of the raised portion 62. When the male shell 31 is driven to slide closer to the female terminal 11, the movable ring plate 43 moves synchronously with the male shell 31 to slide in the movable inner cavity 411. At this time, the contact groove 432 sequentially passes over the raised portion 62 through the movable ring plate 43 to intermittently squeeze the flexible buffer 6, so that the secondary connecting channel 61 is intermittently connected with the connecting hole 412, that is, the flexible buffer 6 is repeatedly clamped to make the pressure in the connecting hole 412 change intermittently, thereby facilitating the discharge of bubbles in the liquid sealant in the connecting hole 412, further improving the distribution uniformity of the sealant. When the male shell 31 and the female terminal 11 are electrically connected and installed, part of the protrusion 62 abuts against the contact groove 432 to allow the movable ring plate 43 to fit with the flexible buffer 6, thereby providing axial buffering between the movable ring sleeve 41 and the male shell 31, thereby improving the service life of the connection between the male shell 31 and the female terminal 11.

[0050] The flexible buffer 6 is intermittently squeezed by the movable ring plate 43 to drive the flip plate 5 to flip and shake on the side of the glue injection hole 313 away from the threaded connection 8, so that the lower end of the flip plate 5 swings, that is, the lower end of the flip plate 5 repeatedly compresses the sealant in the glue injection hole 313 to improve the sealing of the threaded connection 8; and the lower end of the flip plate 5 loosens the solidified sealant on the side of the limiting groove 321 away from the threaded connection 8, thereby loosening the sealant at the far end of the threaded connection 8 of the inner ring sleeve 32 to produce a heat dissipation channel, thereby avoiding the problem of a shorter service life caused by the hardening of the sealant due to the high temperature of the cable 2.

[0051] As 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 material.

[0052] Specifically, Fig.11As shown, the injection port 414 and the flexible buffer 6, when the male shell 31 moves to contact the female terminal 11 to complete the electrical connection, the sealant is injected into the male shell 31 through the injection port 414 and the connecting hole 412 until it moves to the female terminal 11, and then the threaded driving rod 42 is continuously rotated to make the male shell 31 move toward the female terminal 11 and close to it with axial fitting pressure, the contact groove 432 sequentially passes over the protrusion 62 through the movable ring plate 43 to intermittently squeeze the flexible buffer 6, and the injection port 414, the movable ring plate 43, and the flexible buffer Part 6 and flexible contact strip 51 are both transparent materials, and the degree of bubble discharge of liquid sealant in connecting hole 412 and secondary connecting channel 61 can be observed through injection port 414, movable ring plate 43 and flexible buffer part 6; and when the male shell 31 and the female terminal 11 are electrically connected and installed, since the injection hole 313 is blocked by the movable ring sleeve 41, the hardening condition of the sealant in the injection hole 313 can still be observed through the injection port 414, movable ring plate 43, flexible buffer part 6 and flexible contact strip 51, which is convenient for maintenance and installation and repair. Secondly, the flexible buffer part 6 and the flexible contact strip 51 and the sealant in the injection hole 313 are in contact with each other to form an axial buffer layer as a whole, thereby axially buffering the male shell 31 after the connection is completed, and improving the service life of the connection between the male shell 31 and the female terminal 11.

[0053] Working principle: first, the inner ring sleeve 32 is arranged on the peripheral side of the end of the cable 2, and the movable ring sleeve 41 is in the default state. When the inner ring sleeve 32 is threadedly connected to the male head shell 31, the flip plate 5 is driven to flip and is in the default state so that the lower end of the flip plate 5 pushes against the limit groove 321. At this time, the inner ring sleeve 32 is pushed by the flip plate 5 and moves away from the end of the cable 2 to increase the gap between the threaded connection 8, so as to facilitate the flow of the sealant into the threaded connection 8. The copper core 21 is welded to the male shell 31, and the dust adhered to the mask film 92 is cleaned; then, the movable ring sleeve 41 is bolted and coaxially aligned with the female terminal 11 through the through hole 93, and the threaded driving rod 42 is rotated to make the male terminal shell 31 slide closer to the movable ring sleeve 41, and at this time, the male terminal shell 31 also slides axially closer to the female terminal 11; the movable ring sleeve 41 slides relative to the male shell 31 to cover the glue injection hole 313, and the movable ring sleeve 41 pushes against the upper end of the overturning plate 5 to drive the flip plate 5 to flip, and at this time, the lower end of the flip plate 5 flips toward the side of the threaded connection 8 to press the threaded connection 8, and the solidified sealant in the glue injection hole 313 is squeezed and deformed to extend to the outside of the glue injection hole 313; At this time, the movable ring plate 43 is driven to slide by the piston in the movable inner cavity 411, and the movable ring plate 43 slides to drive the reel 7 to rotate to break the mask film 92 near the fixed groove 418, and the reel 7 continues to rotate following the sliding of the movable ring plate 43 to pull the mask film 92 and reel it on the reel 7, and the movable ring plate 43 slides to generate negative pressure suction in the connecting hole 412. The flexible buffer 6 contacts the male shell 31 to achieve the deceleration of the relative axial movement between the movable ring sleeve 41 and the male shell 31 and radial buffering of the male shell 31; When the male shell 31 moves to contact with the female terminal 11 to complete the electrical connection, the sealant is injected into the male shell 31 through the injection port 414 and the connecting hole 412 to move to the female terminal 11, and then the threaded driving rod 42 is continuously rotated to make the male shell 31 move toward the female terminal 11 and close to it with axial fitting pressure. The movable ring plate 43 moves synchronously with the male shell 31 to slide in the movable inner cavity 411, and the contact groove 432 sequentially passes over the protrusion 62 through the movable ring plate 43 to intermittently squeeze the flexible buffer The flexible buffer member 6 is intermittently connected to the connecting hole 412 by the secondary connecting channel 61, that is, the flexible buffer member 6 is repeatedly clamped to make the pressure in the connecting hole 412 change intermittently, so as to facilitate the discharge of bubbles in the liquid sealant in the connecting hole 412; and the flexible buffer member 6 is intermittently squeezed by the movable ring plate 43 to drive the flip plate 5 located in the glue injection hole 313 away from the threaded connection 8 to flip and shake, so as to repeatedly compress the sealant in the glue injection hole 313, and the sealant at the far end of the threaded connection 8 of the inner ring sleeve 32 is loosened to generate a heat dissipation channel; When the male housing 31 and the female terminal 11 are connected with each other by 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.

[0054] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions 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 housing (31), and the threaded drive rod (42) is rotatably disposed on the male housing (31) and is 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.

2. A cable connection mechanism for a tunnel power system according to claim 1, characterized in that: 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). 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 formed 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).

3. The cable connection mechanism of a tunnel power system according to claim 2, characterized in that: 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).

4. A cable connection mechanism for a tunnel power system according to claim 3, characterized in that: 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) to increase the gap at the threaded connection (8), and the male housing (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).

5. The cable connection mechanism of a tunnel power system according to claim 4, characterized in that: It also includes a flexible buffer (6) arranged on the inner ring surface of the movable ring sleeve (41), and 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).

6. A cable connection mechanism for a tunnel power system according to claim 5, 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).

7. A cable connection mechanism for a tunnel power system according to claim 6, 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) away from the threaded connection (8) to flip and shake.

8. The cable connection mechanism of a tunnel power system according to claim 7, characterized in that: 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 material.

9. 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).

10. The cable connection mechanism of a tunnel power system according to claim 2, 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).

Images