Tight wedge self-locking type tension connection fitting

Abstract

The invention relates to the technical field of electric power fittings, and discloses a tight wedge self-locking type tension connection fitting which comprises a conical connection table and a wedge-shaped opening formed in the connection table, a wedge-shaped pin is inserted into the wedge-shaped opening, wire grooves for cables to pass through are formed in the two sides of the wedge-shaped pin, and the wedge-shaped pin is inserted into the wedge-shaped opening. The cable is led in and out around the wedge pin. According to the invention, the wedge-shaped opening is tightly matched with the wedge-shaped pin, the threaded column is rotated to push the wedge-shaped pin to go deep into the connecting table to press the self-locking structure of the cable, and the reinforcement principle of the wedge shape and the self-locking characteristic of the thread are utilized, so that strong friction force can be generated, the cable is tightly fixed, and the problems of loosening, falling off and the like of the cable in the use process are effectively prevented; and the stability and safety of power transmission are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power fittings, and particularly to a tight-wedge self-locking strain connection fitting. Background Art

[0002] In modern power systems, as an important carrier for electric energy transmission, the reliability and stability of the connection of cables are crucial for the safe operation of the entire power network. As a key component for realizing the connection and fixation of cables, the strain connection fitting undertakes the important tasks of reliably connecting the cables, bearing the cable tension, releasing torque, and adapting to various complex working conditions.

[0003] Many problems have emerged in the practical application of traditional strain connection fittings. In terms of connection stability, some connection fittings fix the cables by simple clamping or bundling methods. Over time and under the influence of external environmental factors such as temperature changes and wind forces, loosening is likely to occur, resulting in poor cable contact, increased resistance, heating, and even power outages, which greatly affect the stability and safety of power transmission.

[0004] From the perspective of torque release, when the cable generates torque due to external factors, many traditional fittings lack an effective torque release mechanism. This causes the torque to directly act on the connection between the cable and the fitting. Over time, it may damage the internal structure of the cable, reduce the service life of the cable, and increase the risk of power system failures. Moreover, once a cable fails, due to the complex installation and disassembly methods of traditional fittings, maintenance personnel need to spend a lot of time and energy for operation, seriously affecting the efficiency of power emergency repair and bringing inconvenience to users. Therefore, the present invention provides a tight-wedge self-locking strain connection fitting. Summary of the Invention

[0005] In view of the above deficiencies in the prior art, the present invention provides a tight-wedge self-locking strain connection fitting, which greatly improves the connection stability and effectively avoids cable loosening.

[0006] The present invention provides the following technical solution: A tight-wedge self-locking strain connection fitting includes a connecting platform in the shape of a cone and a wedge-shaped opening formed inside the connecting platform. A wedge-shaped pin is inserted into the wedge-shaped opening, and wire grooves for the cable to pass through are provided on both sides of the wedge-shaped pin, enabling the cable to be led in and out around the wedge-shaped pin.

[0007] A rotatable conical platform is provided on the outer shell of the connecting platform, and a connecting frame is hinged to the outer side of the conical platform, enabling the cable to release torque through the rotation of the conical platform.

[0008] A self-locking structure for pressing against and tightly inserting the wedge-shaped pin is provided at the top of the connecting platform. The self-locking structure presses against the wedge-shaped pin, inserts it into the connecting platform, and locks the wedge-shaped pin to the cable.

[0009] Preferably, the frustum includes a housing and two sets of A bearing brackets and B bearing brackets with different sizes and conical designs arranged inside the housing. The A bearing bracket and the B bearing bracket are rotatable on the inner side surface of the housing, and a plurality of rotatable rollers are provided on both the A bearing bracket and the B bearing bracket. The outer side surface of the connecting platform is in contact with the rollers on the A bearing bracket and the B bearing bracket.

[0010] Preferably, the self-locking structure includes two stacking ears installed at the top end of the connecting platform, and a detachable support block is provided on the two stacking ears. A rotatable threaded column is provided in the middle of the support block. By rotating the threaded column, the wedge pin penetrates into the connecting platform and presses the cable tightly.

[0011] Preferably, through holes are formed on the side surfaces of the two stacking ears, and the support block is inserted into the through holes of the two stacking ears.

[0012] Preferably, holes are provided at the top ends of the stacking ears, and threaded holes are provided at both ends of the support block. Threaded bolts are inserted into the stacking ears, and the threaded bolts extend through the stacking ears into the through holes and are connected to the threaded holes on the support block.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The tight fit between the wedge-shaped opening and the wedge pin, and the self-locking structure that pushes the wedge pin into the connecting platform to press the cable tightly by rotating the threaded column. Utilizing the force-increasing principle of the wedge and the self-locking characteristic of the thread, a strong frictional force can be generated to firmly fix the cable, effectively preventing problems such as loosening and falling off of the cable during use, and ensuring the stability and safety of power transmission.

[0015] (2) The frustum structure composed of the housing, the A bearing bracket and the B bearing bracket. Through the contact of a plurality of rotatable rollers with the outer side surface of the connecting platform, when the cable is subjected to torque, the frustum can rotate flexibly, timely release the torque, avoid damage to the cable and the connecting fittings caused by the torque, extend the service life of the cable and the fittings, and reduce the failure rate caused by torque problems.

[0016] (3) In the self-locking structure, the support block is detachably connected to the stacking ears through the through holes and the threaded bolts. The threaded column is rotatably installed in the middle of the support block. Whether it is to lock the cable by rotating the threaded column clockwise when installing the cable or to unlock the cable by rotating the threaded column counterclockwise when disassembling the cable, the operation is very simple, greatly improving the construction efficiency and reducing the time cost of installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention;

[0018] Figure 2Schematic diagram of the frustum structure of the present invention;

[0019] Figure 3 Schematic diagram of the self-locking structure of the present invention.

[0020] In the figure: 1, connecting platform; 2, wedge-shaped opening; 3, wedge-shaped pin; 4, frustum; 5, self-locking structure; 6, connecting frame; 41, outer shell; 42, A bearing bracket; 43, B bearing bracket; 51, stacking ear; 52, jack; 53, support block; 54, threaded post. Specific embodiments

[0021] 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 in conjunction with the drawings of the embodiments of the present disclosure. To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and known components are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0022] Please refer to Figure 1 , Figure 2 and Figure 3 , the present tension clamp with tight wedge self-locking mainly consists of a connecting platform 1, a wedge-shaped opening 2, a wedge-shaped pin 3, a frustum 4, a self-locking structure 5, and a connecting frame 6. Before installation, first ensure that the installation environment of the tension clamp is clean, dry, and free from interference by sundries. The connecting platform 1 serves as the main support structure of the entire tension clamp. Its shape is a cone and is made of high-strength and corrosion-resistant metal materials, such as high-quality aluminum alloy or special steel, to ensure long-term stable operation in various complex environments.

[0023] The wedge-shaped opening 2 is provided inside the connecting platform 1 and has a specific wedge shape, which closely cooperates with the wedge-shaped pin 3. Thread grooves are provided on both sides of the wedge-shaped pin 3. The shape and size of the thread grooves are precisely designed according to the specifications of the cable to be connected to ensure that the cable can closely fit the thread grooves. When connecting the cable, carefully guide the cable along the thread grooves on both sides of the wedge-shaped pin 3 so that the cable is arranged around the wedge-shaped pin 3, ensuring a smooth import and export path for the cable. After the cable is arranged, insert the wedge-shaped pin 3 into the wedge-shaped opening 2 to initially position the cable.

[0024] The frustum 4 is composed of a housing 41, an A bearing bracket 42 and a B bearing bracket 43. The housing 41 is made of a strong metal material, having good mechanical strength and wear resistance. The A bearing bracket 42 and the B bearing bracket 43 are arranged inside the housing 41, and both are in a frustum design with different sizes. They are installed on the inner side surface of the housing 41 through a plurality of high-precision rollers, and these rollers can rotate freely, enabling the A bearing bracket 42 and the B bearing bracket 43 to rotate flexibly inside the housing 41. The outer side surface of the connecting platform 1 is in close contact with the rollers on the A bearing bracket 42 and the B bearing bracket 43. When the cable is subjected to a torque, the frustum 4 can release the torque through its own rotation, protecting the cable and the connecting fittings from damage. When installing the frustum 4, first install the A bearing bracket 42, the B bearing bracket 43 and their rollers inside the housing 41, ensuring the fitting accuracy and rotational flexibility between the components, and then sleeved the entire frustum 4 on the outside of the connecting platform 1, making the rollers in close contact with the outer side surface of the connecting platform 1.

[0025] The self-locking structure 5 is installed at the top of the connecting platform 1, mainly including two stacking ears 51, a support block 53 and a threaded post 54. The two stacking ears 51 are fixed at the top of the connecting platform 1 by means of welding or high-strength bolts, and through holes 52 are provided on their side surfaces. The support block 53 is connected to the stacking ears 51 by inserting into the through holes 52 of the two stacking ears 51. And holes are provided at the top of the stacking ears 51, and threaded holes are provided at both ends of the support block 53. By inserting the threaded bolt 54 into the holes of the stacking ears 51 and extending it into the through holes 52 to connect with the threaded holes on the support block 53, the detachable installation of the support block 53 is realized. The threaded post 54 is rotatably installed in the middle of the support block 53. By rotating the threaded post 54, its lower end can abut against the top of the wedge pin 3. Make the threaded post 54 abut against the wedge pin 3 and slowly insert it into the wedge-shaped opening 2 of the connecting platform 1, further intensifying the locking of the cable. When the cable needs to be locked, rotate the threaded post 54 clockwise to make it gradually move downward, pushing the wedge pin 3 deeper into the connecting platform 1. The frictional force between the wedge pin 3 and the wedge-shaped opening 2 increases, thus tightly pressing the cable to achieve reliable locking of the cable. When the cable needs to be disassembled, rotate the threaded post 54 counterclockwise to make the wedge pin 3 move upward, releasing the pressing force on the cable.

[0026] The connecting frame 6 is hinged on the outside of the frustum 4, and its material matches that of other components of the connecting fittings, having good strength and toughness. The connecting frame 6 is mainly used to connect other related devices or components. In actual use, according to specific connection requirements, the corresponding devices or components are connected to the connecting frame 6, so as to realize the stable connection of the entire power system. When installing the connecting frame 6, first determine the hinge points on the outside of the frustum 4, and connect the connecting frame 6 to the frustum 4 through hinge components such as pin shafts, ensuring that the connecting frame 6 can rotate flexibly to adapt to different connection angles and working conditions.

[0027] Use and Maintenance of Metal Fittings: When using this tight-wedge self-locking strain connection fitting, operate strictly in accordance with the above installation steps to ensure the correct and firm installation of each component. Regularly inspect and maintain the metal fittings. The inspection contents include whether the connection between the cable and the wedge pin 3 is loose, whether the rotation of the tapered table 4 is flexible, whether the locking of the self-locking structure 5 is reliable, whether the connection of the connecting frame 6 is stable, etc. If any problems are found, adjust or replace the corresponding components in time to ensure the normal operation of the metal fittings and the safe operation of the power system.

[0028] Before installation, carefully check the integrity and quality of each component to ensure there are no damages or defects. At the same time, prepare the required installation tools, such as wrenches, screwdrivers, etc.

[0029] Installation Process:

[0030] Install the wedge pin and the cable: Place the cable accurately in the wire grooves on both sides of the wedge pin 3 according to the design requirements, and then slowly insert the wedge pin 3 into the wedge-shaped opening 2 of the connection platform 1 to preliminarily fix the cable.

[0031] Install the tapered table: Pre-install the A bearing bracket 42 and the B bearing bracket 43 of the tapered table 4 inside the housing 41 and ensure that the rollers can rotate freely. Then install the assembled tapered table 4 on the housing of the connection platform 1 so that the outer side of the connection platform 1 is in full contact with the rollers on the A bearing bracket 42 and the B bearing bracket 43.

[0032] Install the self-locking structure: First, insert the support block 53 into the jack 52 of the two stacking ears 51, and then tightly connect the support block 53 and the stacking ears 51 through the threaded bolt 54. Finally, install the threaded post 54 in the middle of the support block 53 and continuously rotate the threaded post 54 so that the threaded post 54 abuts against the wedge pin 3 and slowly inserts it into the wedge-shaped opening 2 of the connection platform 1.

[0033] Connect the connecting frame: Install the connecting frame 6 on the outside of the tapered table 4 by means of hinge, and adjust the angle and position of the connecting frame 6 according to the actual use scenario to ensure that it can play an effective role.

[0034] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A tight wedge self-locking tension connection fitting, characterized in that: The invention comprises a conical connection platform (1) and a wedge-shaped opening (2) provided inside the connection platform (1), a wedge-shaped pin (3) is inserted into the wedge-shaped opening (2), and both sides of the wedge-shaped pin (3) are provided with cable grooves for passing cables, so that the cables can be introduced and led out around the wedge-shaped pin (3); The outer shell of the connecting platform (1) is provided with a rotatable conical platform (4), and the outer side of the conical platform (4) is hinged with a connecting frame (6), so that the cable can be rotated through the conical platform (4) to release the torque; The top of the connection platform (1) is provided with a self-locking structure (5) for resisting and tightening the wedge pin (3); the self-locking structure (5) resists the wedge pin (3) so that it is inserted into the connection platform (1), thereby locking the wedge pin (3) to the cable.

2. A tight wedge self-locking tension connection fitting according to claim 1, characterized in that: The conical platform (4) comprises a shell (41) and two groups of A bearing frames (42) and B bearing frames (43) of different sizes and conical design arranged inside the shell (41), and the A bearing frames (42) and the B bearing frames (43) are rotatable on the inner surface of the shell (41), and the A bearing frames (42) and the B bearing frames (43) are each provided with a plurality of rotatable rollers, and the outer side surface of the connecting platform (1) contacts the rollers on the A bearing frames (42) and the B bearing frames (43).

3. The tight wedge self-locking tension connection fitting according to claim 1, characterized in that: The self-locking structure (5) comprises two ears (51) mounted on the top of the connecting platform (1), and a detachable support block (53) is provided on the two ears (51). A rotatable threaded column (54) is provided in the middle of the support block (53). By rotating the threaded column (54), the wedge pin (3) is deeply inserted into the connecting platform (1) and the cable is pressed.

4. A tight wedge self-locking tension connection fitting according to claim 3, characterized in that: The sides of the two stack ears (51) are provided with conducting plug holes (52), and support blocks (53) are inserted into the plug holes (52) of the two stack ears (51).

5. A tight wedge self-locking tension connection fitting according to claim 4, characterized in that: The top of the stacking ear (51) is provided with a hole, and both ends of the support block (53) are provided with threaded holes. A threaded bolt (54) is inserted into the stacking ear (51), and the threaded bolt (54) extends through the stacking ear (51) into the insertion hole (52) and is connected to the threaded hole on the support block (53).

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