An aerial power transmission line jumper splice tube

Abstract

The utility model relates to jumper connection pipe technical field, concretely is an overhead power transmission line jumper connection pipe, including connecting mechanism and setting pre -tightening mechanism at connecting mechanism both ends, the connecting mechanism includes the connecting pipe, the connecting pipe is fixed with the connecting block in, the conducting block is installed in the connecting block, pre -tightening part that is circumferentially distributed is set up to the pre -tightening of wire, when the wire is inserted from both ends connection pipe, the limit roller compresses first spring rod, makes pre -tightening part radial expansion, the wire is convenient to enter, when the wire external force is taken out, the wire has the tendency of falling off from connection pipe because of gravity influence, at this moment, the limit roller is under the oppression of first spring rod, radial contraction, the limit roller will extrude support block under the extrusion of wire, and the support block is pasted with friction plate, thereby limit the limit roller continues radial contraction, and react to the wire, realize the extrusion fixed of wire.

Description

Technical Field

[0001] This utility model relates to the field of jumper connection technology, specifically a jumper connection for overhead power transmission lines. Background Technology

[0002] In overhead power transmission lines, jumper splice pipes are key components connecting conductors and jumpers, and their performance directly affects the stability and safety of power grid operation. Traditional splicing methods have significant drawbacks: bolted and grooved clamps are prone to increased contact resistance due to their small contact area, which can lead to localized heating or even the risk of wire breakage; although hydraulic splice pipes provide reliable connections, they require heavy hydraulic equipment, resulting in low efficiency in high-altitude operations and difficulty in adapting to the flexible adjustment needs of the power grid.

[0003] To address the issues of increased contact resistance due to the small contact area of ​​bolted and grooved clamps and the difficulty in adapting hydraulic splicing pipes to the flexible adjustment requirements of power grids, Chinese Patent Publication No. CN219498922U discloses a jumper splicing pipe for overhead power transmission lines, comprising a threaded sleeve, a protective shell, and a wiring device. The threaded sleeve is connected to the protective shell via a threaded connection, and the wiring device forms a snap-fit ​​connection with the protective shell. In this overhead power transmission line jumper splicing pipe, the wire is first passed through a first through-hole into the threaded sleeve, then through a contraction tube and a second through-hole into the wiring device. A first sealing sleeve and a second sealing sleeve seal the device. The wire pushes the pressure plate upwards, and the pressure plate clamps the wire under spring force. A copper block transmits the current in the wire to the other side. The protective shell is then placed on the wiring device, and a fixing post secures the wiring device. Rotating the threaded sleeve locks the protective shell in place. The threaded sleeve, along with the clamping sleeve, moves to apply pressure to the contraction tube, locking the wire in place, thus completing the installation.

[0004] In the above scheme, the cable itself is locked by squeezing the shrink tube with a clamping sleeve, and the cable joint is pressed with a spring to increase the contact area with the copper block, thereby improving the conductivity efficiency. However, in the above scheme, the locking of the cable and the locking of the joint need to be done in steps, and there is no pre-tightening of the cable, which can easily increase the difficulty of high-altitude operation and is not conducive to the rapid and stable connection of the jumper. Therefore, we propose a jumper connection tube for overhead power transmission lines. Utility Model Content

[0005] To solve the above-mentioned technical problems, this application provides an overhead power transmission line jumper splice pipe, including a connecting mechanism and pre-tightening mechanisms disposed at both ends of the connecting mechanism. The connecting mechanism includes a connecting pipe, a connecting block is fixed inside the connecting pipe, and a conductive block is installed inside the connecting block.

[0006] In some embodiments, the pre-tightening mechanism includes a pre-tightening block, a guide tube is fixed to one side of the pre-tightening block, an adjusting ring is installed on the outside of the guide tube, and a pre-tightening component is installed on the inner wall of the pre-tightening block at the position corresponding to the guide tube.

[0007] In some embodiments, the other end of the preload block is threaded to the connecting pipe, the preload block is provided with a groove, and the connecting pipe is fixed with an annular slider at the position corresponding to the groove of the preload block. The preload block and the connecting pipe slide together through the groove and the annular slider.

[0008] In some embodiments, a pre-tightening groove is provided on the side of the pre-tightening block, and a plurality of pre-tightening components are provided. The plurality of pre-tightening components are distributed circumferentially at equal intervals on the inner wall of the side of the pre-tightening block. Each pre-tightening component includes a slide rod. A plurality of pre-tightening grooves are provided, and the plurality of slide rods correspond one-to-one with the plurality of pre-tightening grooves. The slide rods are slidably connected to the pre-tightening grooves. The adjusting ring is provided with a plurality of adjusting slide rails, and the plurality of adjusting slide rails correspond one-to-one with the plurality of slide rods. The adjusting slide rails and the slide rods are nested and slidably connected.

[0009] In some embodiments, the pre-tightening component further includes an adjusting slider, the slide rod is fixed on the adjusting slider, and a pre-tightening mounting block is also fixed on the adjusting slider. The pre-tightening mounting block has symmetrically opened sliding grooves, and a limiting roller is provided on the pre-tightening mounting block. The limiting roller is slidably connected to the pre-tightening mounting block through the sliding groove.

[0010] In some embodiments, limit blocks are symmetrically arranged between the limiting roller and the pre-tightening mounting block, with the two limit blocks located at both ends of the limiting roller. A first spring rod is provided between each of the two limit blocks and the pre-tightening mounting block. A support block is provided on each of the two limit blocks, and the support block is slidably connected to the limit block. A second spring rod is provided between the support block and the limit block. A friction plate is provided between each of the two limit blocks and the pre-tightening mounting block, and the friction plate is fixed on the pre-tightening mounting block.

[0011] In some embodiments, a blocking ring is provided on the conduit, and the adjusting ring is rotatably connected to the conduit through the limiting of the blocking ring. A plurality of through holes are provided at corresponding positions on the adjusting ring and the conduit, and the plurality of through holes are distributed circumferentially at equal intervals on the adjusting ring and the conduit. A locking pin is provided between the adjusting ring and the conduit.

[0012] In some embodiments, spring mounting seats are symmetrically arranged on the connecting block, a clamping plate is arranged below the spring mounting seats, and a spring is arranged between the clamping plate and the spring mounting seats.

[0013] This utility model has at least the following beneficial effects:

[0014] 1. This utility model uses a pre-tightening component arranged in a circular pattern to pre-tighten the wire. When the wire is inserted into the splice tube from both ends, the limiting roller compresses the first spring rod, causing the pre-tightening component to expand radially, facilitating the entry of the wire. When the external force on the wire is removed, the wire tends to fall off the splice tube due to gravity. At this time, the limiting roller contracts radially under the pressure of the first spring rod. Under the pressure of the wire, the limiting roller will squeeze the support block. The support block and the friction plate are in contact, thereby limiting the limiting roller to continue to contract radially, which in turn acts on the wire to achieve compression and fixation of the wire.

[0015] 2. This utility model sets up a support block and a limiting block that are slidably connected. A second spring rod is set between the support block and the limiting block. When the wire enters the connecting tube, the support block will retract along the limiting block under the action of the second spring rod, so that the limiting block moves away from the friction plate, thereby realizing the locking and unlocking of the device and the zeroing of the system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall half-section structure of this utility model;

[0018] Figure 3 This is an exploded view of the pre-tightening mechanism of this utility model;

[0019] Figure 4 This is a partial cross-sectional view of the pre-tightening mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the pre-tightening component structure of this utility model;

[0021] Figure 6 This is a partial exploded cross-sectional view of the pre-tightening component of this utility model;

[0022] Figure 7 This utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0023] In the diagram: 1-Connecting mechanism; 11-Connecting pipe; 12-Connecting block; 13-Conductive block; 14-Spring mounting seat; 15-Pressure plate; 2-Pre-tightening mechanism; 21-Pre-tightening block; 211-Pre-tightening groove; 22-Wire conduit; 221-Blocking ring; 23-Adjusting ring; 231-Adjusting slide rail; 24-Pre-tightening component; 241-Slide rod; 242-Adjusting slider; 243-Pre-tightening mounting block; 244-Friction pad; 245-Support block; 246-Limiting block; 247-First spring rod; 248-Limiting roller; 249-Second spring rod; 25-Locking pin. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Please see Figure 1-6 This utility model provides a technical solution: an overhead power transmission line jumper splice pipe, including a connecting mechanism 1 and a pre-tightening mechanism 2 disposed at both ends of the connecting mechanism 1. The connecting mechanism 1 includes a connecting pipe 11, a connecting block 12 fixed inside the connecting pipe 11, and a conductive block 13 installed inside the connecting block 12.

[0027] The connecting mechanism 1 is used to connect the two ends of the wires and also provides an installation and support platform for the pre-tightening mechanism 2;

[0028] The pre-tightening mechanism 2 includes a pre-tightening block 21, a wire tube 22 is fixed on one side of the pre-tightening block 21, an adjusting ring 23 is installed on the outside of the wire tube 22, and a pre-tightening component 24 is installed on the inner wall of the pre-tightening block 21 at the position corresponding to the wire tube 22.

[0029] The adjusting ring 23 can be rotated to adjust the radial distance of the pre-tightening component 24 to meet the splicing requirements of different types of wires;

[0030] The other end of the pre-tightening block 21 is threaded to the connecting pipe 11. A sliding groove is provided on the pre-tightening block 21. An annular slider is fixed on the connecting pipe 11 at the position corresponding to the sliding groove of the pre-tightening block 21. The pre-tightening block 21 and the connecting pipe 11 slide through the sliding groove and the annular slider.

[0031] The pre-tightening block 21 and the connecting pipe 11 slide through a groove and an annular slider, which ensures that while the pre-tightening block 21 and the connecting pipe 11 rotate in a threaded connection, the pre-tightening block 21 is limited to prevent it from falling off.

[0032] The pre-tightening block 21 has a pre-tightening groove 211 on its side. The number of pre-tightening components 24 is arranged in a circle with equal spacing on the inner wall of the side of the pre-tightening block 21. Each pre-tightening component 24 includes a slide rod 241. The number of pre-tightening grooves 211 is arranged in a circle. The slide rods 241 correspond one-to-one with the pre-tightening grooves 211. The slide rods 241 are slidably connected to the pre-tightening grooves 211. The adjusting ring 23 is provided with a number of adjusting slide rails 231. The adjusting slide rails 231 correspond one-to-one with the slide rods 241. The adjusting slide rails 231 and the slide rods 241 are nested and slide together.

[0033] Locking pin 25 locks the adjusting ring 23 and the wire tube 22 to rotate relative to each other through the through hole;

[0034] One end of the pre-tightening block 21 is threaded to the connecting pipe 11, and the other end is provided with a sliding groove to cooperate with the annular slider. The side has a pre-tightening groove 211 to support the pre-tightening component 24. Axial positioning is achieved through the sliding groove. The pre-tightening groove 211 accommodates the slide rod 241. The inner wall of the wire tube 22 has a spiral groove, and the outer blocking ring 221 serves as a wire insertion channel. The spiral groove increases the contact area, and the blocking ring 221 restricts the axial movement of the adjusting ring 23. The inner wall of the adjusting ring 23 has an Archimedean spiral-shaped adjusting slide rail 231 with anti-slip texture on the outer surface. Rotation drives the pre-tightening component 24, and angle locking is achieved through a locking pin. The adjusting slide rail 231 and the slide rod 241 are nested together.

[0035] The pre-tightening component 24 also includes an adjusting slider 242, a slider 241 fixed on the adjusting slider 242, a pre-tightening mounting block 243 fixed on the adjusting slider 242, a sliding groove symmetrically opened on the pre-tightening mounting block 243, and a limiting roller 248 provided on the pre-tightening mounting block 243, the limiting roller 248 being slidably connected to the pre-tightening mounting block 243 through the sliding groove;

[0036] Limiting blocks 246 are symmetrically arranged between the limiting roller 248 and the pre-tightening mounting block 243. The two limiting blocks 246 are located at both ends of the limiting roller 248. A first spring rod 247 is arranged between each of the two limiting blocks 246 and the pre-tightening mounting block 243. A support block 245 is arranged on each of the two limiting blocks 246. The support block 245 is slidably connected to the limiting block 246. A second spring rod 249 is arranged between the support block 245 and the limiting block 246. A friction plate 244 is arranged between each of the two limiting blocks 246 and the pre-tightening mounting block 243. The friction plate 244 is fixed on the pre-tightening mounting block 243.

[0037] A blocking ring 221 is provided on the conduit 22. The adjusting ring 23 is rotatably connected to the conduit 22 through the limiting of the blocking ring 221. Several through holes are opened at corresponding positions on the adjusting ring 23 and the conduit 22. The several through holes are distributed in a circumferentially spaced manner on the adjusting ring 23 and the conduit 22. A locking pin 25 is provided between the adjusting ring 23 and the conduit 22.

[0038] When the wire is inserted into the splice tube from both ends, the limiting roller 28 compresses the first spring rod 247, causing the pre-tightening component 24 to expand radially, facilitating the entry of the wire. When the external force on the wire is removed, the wire tends to fall off the splice tube due to gravity. At this time, the limiting roller 248 contracts radially under the pressure of the first spring rod 247. Under the pressure of the wire, the limiting roller 248 will squeeze the support block 245. The support block 245 is in contact with the friction plate 244, thereby limiting the limiting roller 248 to continue to contract radially, which in turn acts on the wire to achieve compression and fixation of the wire.

[0039] The cylindrical slide bar 241 converts rotational motion into linear motion and moves radially along the preload groove 211. The adjusting slider 242 connects the slide bar 241 and the preload mounting block 243, transmitting the driving force of the adjusting ring 23. The preload mounting block 243 has symmetrical sliding grooves that fix the friction plate 244 and support the limiting roller 248. The radial floating of the limiting roller 248 is achieved through the sliding grooves. The friction plate 244 and the limiting block 246 cooperate to generate friction. The wedge-shaped support block 245 supports the second spring rod 249, enabling the limiting block 246 to tilt. The limiting block 246 is designed with two symmetrical blocks to restrict the axial movement of the limiting roller 248. Radial floating is achieved through the first spring rod 247, which provides the initial preload. The limiting roller 248 is a double-row tapered roller bearing that directly contacts the wire. The bearing structure reduces frictional resistance. The second spring rod 249 compensates for the tilt of the limiting block 246 through the support block 245, ensuring uniform contact between the friction plate 244 and the wire tube 22. The locking pin fixes the adjusting ring 23 and the wire tube 22, and the pin hole spacing corresponds to the standard preload setting.

[0040] Example 2:

[0041] Please see Figure 1-7 This utility model provides a technical solution: an overhead power transmission line jumper connector, including a spring mounting seat 14 symmetrically arranged on a connecting block 12, a pressing plate 15 arranged below the spring mounting seat 14, and a spring arranged between the pressing plate 15 and the spring mounting seat 14.

[0042] The connecting tube 11 is a hollow cylinder with an annular slider on its outer wall to support the connecting block 12 and the conductive block 13. It is connected to the pre-tightening block 21 by threads. The annular slider and the pre-tightening block 21 are fitted with a groove to achieve axial positioning. The connecting block 12 is a bimetallic composite block that fixes the conductive block 13. A spring mounting seat 14 is provided on the top. A constant pressure is applied to the conductive block 13 by the pressure plate 15. The conductive block 13 forms multi-point contact with the wire. The wedge design compensates for the contact area of ​​the wire. The spring mounting seat 14 presses the wire down to make close contact with the conductive block 13. The pressure plate 15 evenly transmits the spring pressure to the conductive block 13.

[0043] The support block 245 is slidably connected to the limiting block 246. A second spring rod 249 is provided between the support block 245 and the limiting block 246. When the wire enters the connecting tube, the support block 245 will retract along the limiting block 246 under the action of the second spring rod 249, so that the limiting block 246 moves away from the friction plate 244, thereby realizing the locking and unlocking of the device and the zeroing of the system.

[0044] When the wire is inserted into the splice tube, the limiting roller 248 contracts radially under the pressure of the wire, and at the same time compresses the first spring rod 247. After the wire enters, the first spring rod 247 pushes the limiting roller 248 to contract radially, squeezing the wire and achieving initial fixation. The rotating adjusting ring 23 drives the slide rod 241 to move radially along the pre-tightening groove 211 via the spiral slide rail on its inner wall, which in turn drives the limiting roller 248 on the pre-tightening mounting block 243 to further squeeze the wire. The pre-tightening force is maintained by the friction self-locking between the friction plate 244 and the limiting block 246. At the same time, the spring in the connecting block 12 applies constant pressure to the conductive block 13 through the pressing plate 15 to ensure that the conductive block 13 is in continuous contact with the wire. The support block 245 and the second spring rod 249 realize the tilt compensation of the limiting block 246, ensuring uniform contact between the friction plate 244 and the wire tube 22. The locking pin fixes the adjusting ring 23 and the wire tube 22 to achieve angle locking and complete the splicing of the wire.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aerial power transmission line jumper splice tube characterized by: It includes a connecting mechanism (1) and a pre-tightening mechanism (2) disposed at both ends of the connecting mechanism (1). The connecting mechanism (1) includes a connecting pipe (11), a connecting block (12) is fixed inside the connecting pipe (11), and a conductive block (13) is installed inside the connecting block (12). The pre-tightening mechanism (2) includes a pre-tightening block (21), a wire tube (22) is fixed on one side of the pre-tightening block (21), an adjusting ring (23) is installed on the outside of the wire tube (22), and a pre-tightening component (24) is installed on the inner wall of the pre-tightening block (21) at the position corresponding to the wire tube (22). The other end of the pre-tightening block (21) is threadedly connected to the connecting pipe (11). The pre-tightening block (21) has a sliding groove. The connecting pipe (11) has an annular slider fixed at the position corresponding to the sliding groove of the pre-tightening block (21). The pre-tightening block (21) and the connecting pipe (11) slide together through the sliding groove and the annular slider.

2. The jumper splice tube for overhead power transmission lines according to claim 1, characterized in that: The pre-tightening block (21) has a pre-tightening groove (211) on its side. The number of pre-tightening components (24) is set to a certain extent. The pre-tightening components (24) are distributed in a circumferentially spaced manner on the inner wall of the side of the pre-tightening block (21). The pre-tightening component (24) includes a slide rod (241). The number of pre-tightening grooves (211) is set to a certain extent. The slide rods (241) correspond one-to-one with the pre-tightening grooves (211). The slide rods (241) are slidably connected to the pre-tightening grooves (211). The adjusting ring (23) is provided with a certain number of adjusting slide rails (231). The adjusting slide rails (231) correspond one-to-one with the slide rods (241). The adjusting slide rails (231) and the slide rods (241) are nested and slide together.

3. The jumper splice tube for overhead power transmission lines according to claim 2, characterized in that: The pre-tightening component (24) also includes an adjusting slider (242), the sliding rod (241) is fixed on the adjusting slider (242), and a pre-tightening mounting block (243) is also fixed on the adjusting slider (242). The pre-tightening mounting block (243) has symmetrically opened sliding grooves, and a limiting roller (248) is provided on the pre-tightening mounting block (243). The limiting roller (248) is slidably connected to the pre-tightening mounting block (243) through the sliding groove.

4. The jumper splice tube for overhead power transmission lines according to claim 3, characterized in that: Limiting blocks (246) are symmetrically arranged between the limiting roller (248) and the pre-tightening mounting block (243). The two limiting blocks (246) are located at both ends of the limiting roller (248). A first spring rod (247) is provided between the two limiting blocks (246) and the pre-tightening mounting block (243). A support block (245) is provided on each of the two limiting blocks (246). The support block (245) is slidably connected to the limiting block (246). A second spring rod (249) is provided between the support block (245) and the limiting block (246). A friction plate (244) is provided between the two limiting blocks (246) and the pre-tightening mounting block (243). The friction plate (244) is fixed on the pre-tightening mounting block (243).

5. The jumper splice tube for overhead power transmission lines according to claim 1, wherein: A blocking ring (221) is provided on the conduit (22). The adjusting ring (23) is rotatably connected to the conduit (22) through the limiting of the blocking ring (221). A plurality of through holes are provided at corresponding positions on the adjusting ring (23) and the conduit (22). The plurality of through holes are distributed in a circumferentially spaced manner on the adjusting ring (23) and the conduit (22). A locking pin (25) is provided between the adjusting ring (23) and the conduit (22).

6. The jumper splice tube for overhead power transmission lines according to claim 1, wherein: A spring mounting seat (14) is symmetrically arranged on the connecting block (12), and a pressure plate (15) is arranged below the spring mounting seat (14). A spring is arranged between the pressure plate (15) and the spring mounting seat (14).

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