Cross-linking intermediate joint

Abstract

The utility model discloses a cross-linked intermediate joint, which relates to the technical field of cable accessories and comprises a connecting pipe body and an inner shielding pipe, the connecting pipe body is used for connecting cables at two ends, the inner shielding pipe is wrapped on the connecting pipe body, and an outer shielding pipe is wrapped on the inner shielding pipe. The two sides in the outer shielding pipe are each provided with a stress cone, the device further comprises an abutting mechanism, the abutting mechanism comprises an annular abutting support, the inner walls of the two ends of the outer shielding pipe are each provided with a positioning circular ring, each positioning circular ring is evenly provided with a plurality of threaded rods in the circumferential direction of the positioning circular ring, and the threaded rods are connected with the annular abutting support. All the threaded rods are in threaded connection to the positioning circular ring, the ends of all the threaded rods are jointly connected with a pushing circular ring in a rotating fit mode, and the end of the pushing circular ring is connected with an annular abutting support; the cables at the two ends are connected through the connecting pipe body, the pushing circular ring and the annular abutting support are pushed through the adjusting threaded rod to provide bearing force for the stress cone, and displacement of the stress cone is prevented.

Description

Technical Field

[0001] This utility model relates to the field of cable accessories technology, specifically a cross-linking intermediate joint. Background Technology

[0002] As is generally known, a cable joint is an accessory installed between cables to connect two or more cable conductors, providing a certain level of insulation and sealing. The main function of a cable joint is to lock and secure the incoming and outgoing cables, ensuring the continuity and stability of the line. It also serves to waterproof, dustproof, and shockproof, protecting the cable from damage caused by the external environment. As an indispensable component of cable lines, cable joints come in various types and have different functions to meet the needs of different scenarios. Correct selection and installation of cable joints are crucial to ensuring the reliable operation of cable lines.

[0003] For example, patent CN209981488U, published on January 21, 2020, entitled "A Crosslinking Intermediate Joint," discloses a crosslinking intermediate joint. The joint sleeve body has an expansion liner inserted into its inner wall, and a movable tube is inserted into the inner wall of the expansion liner. The expansion liner has spirally distributed reinforcing lines embedded within it, and a spirally extending tear line is provided on the side wall of the expansion liner near the reinforcing lines. A rectangular hole is provided at one end of the side wall of the movable tube, and a tear strip is provided on the inner wall of the expansion liner near the tear line, passing through the rectangular hole. A pull rope is provided at one end of the side wall of the tear strip, and one end of the pull rope extends from one end of the movable tube. This patent can support the expansion liner, preventing deformation of the expansion liner during transportation or use, increasing the strength of the terminal joint, preventing damage during transportation, facilitating the tearing and removal of the expansion liner, and allowing for better control of the tearing angle of the tear strip, reducing the possibility of breakage during tearing.

[0004] The shortcoming of the existing technology is that when the connecting tube, inner shielding tube and outer shielding tube are connected to the two ends of the cable, the stress cone has no point of force at the end, causing the stress cone to shift towards the two ends of the connecting tube during use. This leads to instability in the connection between the intermediate joint and the cable, affecting the use of the cable connection part. Utility Model Content

[0005] The purpose of this invention is to provide a crosslinking intermediate joint to solve the above-mentioned problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cross-linking intermediate joint, comprising a connecting tube for connecting two cables and an inner shielding tube, wherein the connecting tube is wrapped with the inner shielding tube, and the inner shielding tube is wrapped with an outer shielding tube, and a stress cone is installed on each side inside the outer shielding tube, and further comprising an abutment mechanism, wherein the abutment mechanism comprises an annular abutment support, wherein a positioning ring is installed on the inner wall of each end of the outer shielding tube, wherein a plurality of threaded rods are evenly arranged on the positioning ring along its circumferential direction, wherein each threaded rod is threadedly connected to the positioning ring, and the ends of each threaded rod are connected to a push ring by a rotatable engagement, wherein the end of the push ring is connected to an annular abutment support.

[0007] As mentioned above, a sealing ring is installed at each end of the inner shielding tube.

[0008] As mentioned above, two water-swellable rubber parts are symmetrically installed on the inner wall of the inner shielding tube between the two sealing rings.

[0009] As mentioned above, both ends of the outer wall of the outer shielding tube are wrapped with PVC waterproof tape.

[0010] As mentioned above, a joint insulation layer is uniformly provided between the outer shielding tube and the inner shielding tube.

[0011] As mentioned above, the outer wall of the outer shielding tube is wrapped with insulating self-adhesive tape.

[0012] As mentioned above, the outer wall of the insulating self-adhesive tape is wrapped with lead tape.

[0013] The lead strip described above is wrapped with a copper mesh strip on its outer wall.

[0014] As mentioned above, the outer wall of the copper mesh belt is wrapped with heat shrink tubing.

[0015] As mentioned above, a protective mechanism is provided on the outer wall of the heat shrink tubing, which is used to protect the heat shrink tubing.

[0016] The beneficial effects of this utility model are as follows: By connecting the cables at both ends through the connecting pipe body, inner shielding pipe, and outer shielding pipe, the stress generated by the cable is dispersed to the surrounding environment through the stress cone, reducing the concentration of stress on the cable and avoiding damage caused by excessive stress. The operator adjusts the position of the threaded rod on the positioning ring to push the advancing ring to move. The advancing ring pushes the annular clamping support to move, so that the annular clamping support is pressed against the end of the stress cone. This provides clamping force to the end of the stress cone, preventing the stress cone from shifting to both ends of the connecting pipe body, improving the stability of the intermediate joint for cable connection, and enabling the cable connection part to be used normally. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a partial cross-sectional structural diagram of the present invention;

[0019] Figure 2 This utility model Figure 1 A magnified cross-sectional view of point M;

[0020] Figure 3 This utility model Figure 1 A magnified cross-sectional diagram of point N.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Connecting pipe body; 2. Inner shielding pipe; 3. Outer shielding pipe; 4. Stress cone; 5. Annular clamping support; 6. Positioning ring; 7. Threaded rod; 8. Propulsion ring; 9. Cable copper wire; 10. Cable insulation layer; 11. Joint insulation layer; 12. PVC waterproof tape; 13. Insulating self-adhesive tape; 14. Lead tape; 15. Copper mesh tape; 16. Heat shrink tubing; 17. Sealing ring; 18. Water-swellable rubber parts; 19. Annular baffle; 20. Copper protective shell; 21. Annular slot; 22. Annular insert rod; 23. Concave hole; 24. Slide groove; 25. Straight rod; 26. Elastic element. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 3 As shown, an embodiment of this utility model provides a cross-linking intermediate joint, including a connecting tube 1 for connecting two cables and an inner shielding tube 2. The connecting tube 1 is wrapped with the inner shielding tube 2, and the inner shielding tube 2 is wrapped with an outer shielding tube 3. A stress cone 4 is installed on each side inside the outer shielding tube 3. It also includes an abutment mechanism, which includes an annular clamping support 5. A positioning ring 6 is installed on the inner wall of each end of the outer shielding tube 3. A plurality of threaded rods 7 are evenly arranged on the positioning ring 6 along its circumferential direction. Each threaded rod 7 is threadedly connected to the positioning ring 6. The ends of each threaded rod 7 are connected to a push ring 8 by rotational engagement. The end of the push ring 8 is connected to an annular clamping support 5.

[0025] Specifically, the cross-linking intermediate joint is a cable accessory that connects cables at both ends. The connecting tube 1 is a tubular structure that connects the copper wires 9 of the cable. The outer portions of the copper wires 9 at both ends of the connecting tube 1 have a cable insulation layer 10. The inner shielding tube 2 is wrapped around the outer wall of the connecting tube 1, and the outer shielding tube 3 is wrapped around the inner shielding tube 2. A joint insulation layer 11 is evenly distributed between the outer shielding tube 3 and the inner shielding tube 2. The joint insulation layer 11 insulates the inner shielding tube 2 and the connecting tube 1. The outer walls of both ends of the outer shielding tube 3 are wrapped with PVC waterproof tape 12, which provides waterproof sealing to both ends of the outer shielding tube 3. The outer wall of the outer shielding tube 3 is wrapped with insulating self-adhesive tape 13, which provides comprehensive insulation to the outer shielding tube 3. The insulating self-adhesive tape 13 has at least 8 layers. The outer wall of the insulating self-adhesive tape 13 is wrapped with lead tape 14. The outer wall of the lead tape 14 is wrapped with copper mesh tape 15. The outer wall of the copper mesh tape 15 is wrapped with heat shrink tubing 16, which allows the lead tape 14, copper mesh tape 15, and heat shrink tubing 16 to stably wrap the outer shielding tube 3, preventing the outer shielding tube 3, inner shielding tube 2, and connecting tube 1 from detaching. This improves the stability of the connection between the outer shielding tube 3, inner shielding tube 2, and connecting tube 1 and the cables at both ends. A stress cone 4 is installed on each side inside the outer shielding tube 3. The stress cone 4 disperses the stress generated by the cable to the surrounding environment, reducing the concentration of stress on the cable and preventing excessive stress from damaging the cable. The operator adjusts the position of the threaded rod 7 on the positioning ring 6 to push the advancing ring 8. The advancing ring 8 pushes the annular clamping support 5 to move, so that the annular clamping support 5 is pressed against the end of the stress cone 4. This provides a clamping force to the end of the stress cone 4, preventing the stress cone 4 from shifting to both ends of the connecting tube 1, improving the stability of the intermediate joint for the cable connection, and ensuring the normal use of the cable connection.

[0026] The shortcoming of the existing technology is that when the connecting tube 1, inner shielding tube 2 and outer shielding tube 3 are connected to the two ends of the cable, the stress cone 4 has no force point at the end, causing the stress cone 4 to shift to both ends of the connecting tube 1 during use, which leads to the instability of the intermediate joint to the cable connection and affects the use of the cable connection part.

[0027] The beneficial effects of this embodiment are as follows: the cables at both ends are connected by connecting tube 1, inner shielding tube 2 and outer shielding tube 3. The stress cone 4 disperses the stress generated by the cable to the surrounding environment, reducing the concentration of stress on the cable and avoiding damage to the cable due to excessive stress. The operator adjusts the position of the threaded rod 7 on the positioning ring 6 to push the advancing ring 8 to move. The advancing ring 8 pushes the annular clamping support 5 to move, so that the annular clamping support 5 is pressed against the end of the stress cone 4. The annular clamping support 5 provides clamping force to the end of the stress cone 4, preventing the stress cone 4 from displacing to both ends of the connecting tube 1, improving the stability of the intermediate joint for cable connection, and enabling the cable connection part to be used normally.

[0028] In another embodiment of this utility model, a sealing ring 17 is installed at each end of the inner shielding tube 2; two water-swellable rubber parts 18 are symmetrically installed on the inner wall of the inner shielding tube 2 between the two sealing rings 17.

[0029] Specifically, the sealing ring 17 and the water-swellable rubber component 18 provide a comprehensive seal between the two ends of the inner shielding tube 2 and the cable insulation layer 10. Even if moisture enters the inner side of the cable insulation layer 10 through the sealing ring 17, the water-swellable rubber component 18 provides a secondary seal between the inner shielding tube 2 and the cable insulation layer 10. The water-swellable rubber component 18 expands upon contact with moisture, ensuring a complete seal between the inner shielding tube 2 and the cable insulation layer 10. Furthermore, the water-swellable rubber component 18 is equipped with an alarm device. When the water-swellable rubber component 18 expands, the alarm device emits an alarm signal and transmits the expansion signal wirelessly to a signal collection center, allowing staff to be promptly notified of moisture ingress between the inner shielding tube 2 and the cable insulation layer 10, facilitating protective measures.

[0030] In another embodiment of this utility model, an annular baffle 19 is provided on the inner wall of the outer shielding tube 3 between the two stress cones 4. The distance between the two annular baffles 19 and the connecting tube 1 is greater than 75mm. Specifically, the two annular baffles 19 block the stress cones 4 to prevent them from sliding too much toward one end of the connecting tube 1 under the pushing action of the threaded rod 7, the pushing ring 8, and the annular clamping support 5. This would result in the distance between the stress cones 4 and the connecting tube 1 being too small. When the distance between the stress cones 4 and the connecting tube 1 is less than 75mm, a breakdown is likely to occur. In this embodiment, by providing annular baffles 19 on the inner wall of the outer shielding tube 3 to block the stress cones 4 from sliding toward one end of the connecting tube 1, the risk of breakdown inside the connecting tube 1 can be greatly reduced, thus providing stability for the cable connection of the connecting tube 1.

[0031] In another embodiment of this utility model, a protective mechanism is provided on the outer wall of the heat shrink tubing 16. The protective mechanism is used to protect the heat shrink tubing 16. The protective mechanism includes a copper protective shell 20, which is divided into two sections. A docking mechanism is provided at the connecting end of the copper protective shell 20. The docking mechanism includes a plug rod. One end of the copper protective shell 20 is provided with an annular slot 21, and the other end of the copper protective shell 20 is provided with an annular plug rod 22. A plurality of recessed holes 23 are evenly provided on the annular plug rod 22 along its circumferential direction. A plurality of sliding grooves 24 are evenly provided on the inner wall of the annular slot 21 along its circumferential direction. A straight rod 25 is slidably and sealed in each of the sliding grooves 24. Each straight rod 25 and the inner wall of the sliding groove 24 are connected by two symmetrically arranged elastic elements 26. The bottom end of each straight rod 25 and the end of the annular plug rod 22 are wedge-shaped and engaged with each straight rod 25 and its corresponding recessed hole 23.

[0032] Specifically, when the two copper protective shells 20 are used to protect the exterior of the heat shrink tubing 16, the workers connect the two copper protective shells 20 together, so that the annular insert 22 at the end of the other copper protective shell 20 is inserted into the annular slot 21 at the end of the first copper protective shell 20. During the process of inserting the annular insert 22 into the annular slot 21: when the annular insert 22 and the straight rod 25 abut against each other, due to the wedge-shaped fit between the bottom end of the straight rod 25 and the end of the annular insert 22, the straight rod 25 is positioned within the annular insert 22. Under the pushing action of the end, the straight rod 25 slides towards the outer end of the copper protective shell 20 within the groove 24, causing the straight rod 25 to press against the elastic element 26 (the elastic element 26 is a component capable of extension and retraction, preferably a spring) until the straight rod 25 moves to the position of the recess 23. Under the rebound action of the elastic element 26, the straight rod 25 slides towards the inner end of the recess 23, causing the straight rod 25 to be inserted into the recess 23. Through the mutual insertion and cooperation of the annular insert 22, the annular slot 21, the straight rod 25, and the recess 23, it can... The existing technology requires applying silicone to the sealing ring of the interface of the copper protective shell 20 and assembling the two sections of the copper protective shell 20 with screws. In this embodiment, it is not necessary to tighten multiple screws at the connection position of the copper protective shell 20. The two sections of the copper protective shell 20 can be positioned by simply using the interlocking of the annular insert 22, the annular slot 21, the straight rod 25 and the concave hole 23. This improves the convenience of the connection and positioning of the copper protective shell 20. After the annular insert 22 and the annular slot 21 are interlocked and positioned, the workers use tools to weld the two sections of the copper protective shell 20. Then, epoxy putty is evenly applied to the connection position of the copper protective shell 20 to completely cover the metal conductive layer. Waterproof tape is then wrapped around the epoxy putty area. The heat shrink tubing body is then inserted into the epoxy putty area and tightened. A fiberglass protective shell is provided on the outer wall of the copper protective shell 20. The fiberglass protective shell protects the copper protective shell 20 and further improves the stability of the heat shrink tubing 16 and the internal structure connection.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, 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 cross-linked intermediate joint, comprising a connecting tube for connecting two cables and an inner shielding tube, wherein the connecting tube is wrapped with the inner shielding tube, the inner shielding tube is wrapped with an outer shielding tube, and a stress cone is installed on each side inside the outer shielding tube, characterized in that, It also includes an abutting mechanism, which includes an annular abutting support. A positioning ring is installed on the inner wall of each end of the outer shielding tube. Multiple threaded rods are evenly arranged on the positioning ring along its circumferential direction. Each threaded rod is threadedly connected to the positioning ring. The ends of each threaded rod are connected to a pushing ring in a rotatable manner. The end of the pushing ring is connected to an annular abutting support.

2. A crosslinking intermediate joint according to claim 1, characterized in that, A sealing ring is installed at each end of the inner shielding tube.

3. A cross-linking intermediate joint according to claim 2, characterized in that, Two water-swellable rubber components are symmetrically installed on the inner wall of the inner shielding tube between the two sealing rings.

4. A crosslinking intermediate joint according to claim 1, characterized in that, Both ends of the outer shielding tube are wrapped with PVC waterproof tape.

5. A cross-linking intermediate joint according to claim 1, characterized in that, A joint insulation layer is uniformly provided between the outer shielding tube and the inner shielding tube.

6. A cross-linking intermediate joint according to claim 5, characterized in that, The outer wall of the outer shielding tube is wrapped with insulating self-adhesive tape.

7. A cross-linking intermediate joint according to claim 6, characterized in that, The outer wall of the insulating self-adhesive tape is wrapped with lead tape.

8. A cross-linking intermediate joint according to claim 7, characterized in that, The lead strip is wrapped with a copper mesh strip on its outer wall.

9. A cross-linking intermediate joint according to claim 8, characterized in that, The outer wall of the copper mesh belt is wrapped with heat shrink tubing.

10. A crosslinking intermediate joint according to claim 9, characterized in that, A protective mechanism is provided on the outer wall of the heat shrink tubing, which is used to protect the heat shrink tubing.

Images