KR20070063755A - An anti-slip device for connecting steel core of steel cored aluminium strand for overhead electric power distribution - Google Patents

Abstract

An apparatus for preventing sliding of a steel core in connection of a steel cored aluminum strand for an overhead power distribution is provided to prevent the wire from being slid from the steel cored aluminum strand and to improve a construction by removing a noise. An apparatus for preventing sliding of a steel core in connection of a steel cored aluminum strand for an overhead power distribution includes a connector body(1), an aluminum jacket(2), a pipe fitting(3), a steel jacket(4), a fixed body, and a steel core(6). The pipe fitting(3) and the steel jacket(4) are connected through a circular cone. The steel jacket(4) is fixed on the steel core(6). The steel jacket(4) fixes the steel core(6) with the pipe fitting(3) by the fixed body. The ear-attached steel jacket(4) fixes the steel core(6) with the fixed body. A window(8) is installed to disassemble and install on the connector body(1). The steel jacket(4) having two plates is installed on a big groove of a stepped unit of the aluminum jacket(2) through a pin.

Description

An anti-slip device for connecting steel core of steel cored aluminum strand for overhead electric power distribution}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the application of the present invention to a connection of a large diameter steel cored aluminum strand.

FIG. 2 is a cross-sectional view taken along the line A-A of FIG.

3 is a schematic view of a low carbon steel pipe fitting modified clamping steel core.

4 is a cross-sectional view taken along line B-B in FIG.

5 is a clamping structure diagram in which a steel jacket is installed in a large end groove of an aluminum jacket.

6 is a cross-sectional view taken along line C-C in FIG.

7 is a diagram in which two wires are applied to an overlapping connection according to the present invention.

8 is a schematic diagram of a pipe fitting steel core wedge iron clamping structure.

9 is a sectional view taken along the line D-D in FIG.

10 is a structural diagram in which a steel jacket with an ear clamps steel cores through bolts.

FIG. 11 is a sectional view taken along the line E-E of FIG.

Fig. 12 is a schematic diagram of a pipe fitting steel core core expander clamping structure used for a small diameter conductor (pipe reduction main body).

Fig. 13 is a schematic diagram of a pipe fitting steel core clamping structure used for a small diameter conductor (pipe reducing body).

Figure 14 is an application diagram in the tension clamp in the present invention.

15 is a view of a conventional conical tube wedge shaped clamping connector.

Explanation of symbols for the main parts of the drawings

1: body 2: aluminum jacket

3: pipe fitting 4: steel jacket

6: steel core 8: window

The present invention relates to a device for preventing slippage of steel cores in the connection of steel core-type aluminum strands for processing power distribution, and is applied to a conductor connector and a tension clamp.

Currently, there are three basic structures and clamping methods for steel cored aluminum strand connectors for overhead distribution. One of them is elliptic tube connection, that is, two strands of soft line ends are connected in parallel to cover an elliptical aluminum tube and clamped using explosion pressure method. The second is connected to each other using elliptical aluminum tube conductors, that is, the two ends of the conductors are connected to each other to fit in an oval aluminum tube, and the steel core slides to remove the aluminum wire at the end of the conductor. To prevent this, fitting a low-carbon steel tube with a relatively small diameter is used, and the clamping is maintained by using the hydraulic method and the explosion pressure method. The third method uses steel cored aluminum strands with diameters smaller than Φ23 mm for tension clamps to maintain clamping using generally U-shaped bolts, while relatively large diameter conductors are still clamped using explosion pressure or hydraulic methods. Keep it. Each method described above has the following disadvantages. Explosion pressure methods present safety concerns for placing or using explosives. The noise of the explosive is loud and easily damages the wire. The hydraulic method requires a hydraulic press, which is relatively heavy in its own weight and needs to be carried, and also has high labor intensity and low efficiency when operated. Bolt clip fastening still suffers from high labor intensity and low efficiency. In addition, it is not easy to maintain clamping when the steel cored aluminum strand lead diameter exceeds Φ23 mm.

Recently, a kind of conical tube wedge self clamping connector has emerged, the structure of which is referred to in FIG. The structure consists of a socket, case, aluminum jacket, deflection cap, spring and intermediate shaft. The principle of operation is as follows. The conductor is inserted through the socket into the deflection cap and then continuously pushed out of the aluminum jacket to retract, and the conductor is opened to insert the aluminum jacket. Under the spring action of the aluminum jacket, its inner saw blade is pressed against the outer surface of the conductor. When pulling the lead, the saw blade of the aluminum jacket is clamped on the lead. The lead causes a grip against the steel core, and the grip increases as the tension increases. This connects the conductors and fulfills the purpose of electrical conduction. Although these connectors are convenient to operate, efficient, stable in electrical conduction and advantageous for mass production, practical evidence shows that the grip force produced by the aluminum jacket when the connector maintains clamping of large diameter conductors It is difficult to overcome the sliding movement, as a result of which the conductor is already cut. In addition, when the diameter of the wire is relatively large, it is difficult to compress a large diameter conical tube.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned drawbacks and to provide a device for preventing slippage of steel cores in the connection of steel core aluminum strands for processing distribution, including connector bodies, aluminum jackets, pipe fittings, steel jackets and fixtures. There is. That is, the problem is to solve the problem of steel core slipping during steel core aluminum strand connection.

In the context of the present invention, steel cored aluminum strand connected steel core anti-slip devices for processing distribution include pipe fittings, steel cores, fixtures and core expanders. Pipe fittings and steel jackets are joined by conical surfaces, and steel jackets are tightly fixed to steel cores. Alternatively, secure the steel core through the fixture with a pipe fitting. Alternatively, the steel jacket firmly holds the steel core through the fixture. On the main body, there is a window for installation disassembly.

Steel core aluminum strand connection for processing power distribution Steel core The pipe fittings of the device to prevent slipping have conical grooves, the outer cone of the steel jacket and the conical groove of the pipe fittings fit together, and the steel jacket has two conical plate structures. Was done. On the inner surface of the steel jacket there is a saw blade that increases the tightening force and is fitted over the steel core. Two-plate steel jackets can also be mounted through the pins into the large end groove of the aluminum jacket. Pipe fittings with inner cones can also be mounted on steel cores, and wedge core expanders are installed inside steel cores. There is a wedge iron groove above the pipe fitting with the saw blade of the inner groove, and the wedge iron with the saw blade is installed between the steel core and the pipe fitting. Plastically deformed low carbon steel pipe fittings may be crimped by fitting a steel jacket with two plate saw blades onto a steel core. A steel jacket with ears is mounted on the steel core, and the clamping bolts can be installed in a bolt groove above the ears of the steel jacket.

Advantages of the present invention are as follows. When installing, first remove the aluminum wire at the end of the steel core aluminum strand (lead wire) to expose the steel core and install it on the steel core. After laying the conductor, the tension of the conductor causes the steel core to be tensioned, and the steel core and the pipe fitting are firmly fitted to form one. At the same time, the pipe fitting of the pipe fitting steel core mechanism pushes out the aluminum jacket, which moves the axial position in the body to clamp the conductor. The steel core does not slip between the aluminum wire and the wire, and the aluminum wire is pulled out and broken, and safety distribution is ensured. The installation of the present invention is also convenient, low labor intensity and no noise.

The present invention relates to an apparatus for preventing slippage of a steel core in connecting a steel cored aluminum strand for processing power distribution, wherein the connector body 1 and an aluminum jacket 2 having a saw blade portion are provided. ), A pipe fitting (3), a steel jacket (4) with saw blades, a fixture (9, 12, 13, 14) and a steel core (6), the pipe fitting ( 3) and the steel jacket 4 are joined by a conical surface, the steel jacket 4 is firmly fixed to the steel core 6, or the steel jacket 4 is fixed together with a pipe fitting 3 (9, 12, 14)), or firmly fix the steel core (6) together with the fixing body 13 with a steel jacket (4) with ears, and the body ( 1) Steel core eggs for distribution of overhead power, on which windows 8 for such dismantling are installed. In minyum to connect the strands to an apparatus for preventing the sliding of the steel core.

Herein, a conical groove is provided in the pipe fitting 3, the outer cone of the steel jacket 4 and the conical groove of the pipe fitting 3 are combined with each other, and the steel jacket 4 has two conical plates. It is preferable that a saw blade is provided on the inner surface of the steel jacket 4 to increase the tightening force and is fitted on the steel core 4, and that the steel jacket 4 composed of two plates is connected to the pin 9 It is preferable to be able to install in a large groove of the end of the aluminum jacket (2) through.

The following is an embodiment of the present invention conforming to the accompanying drawings.

Embodiment 1 refers to FIGS. 1 and 2. The aluminum jacket 2 with two saw blades is provided in the outer surface of the conducting wire 7, and the main body 1 is provided in the outer surface of the aluminum jacket 2. As shown in FIG. The two are in conical surface contact, the body is a tin-aluminum part, and a window 8 is installed to insert a pipe fitting 3 and a steel jacket 4. On the outside of the steel core 6, a steel jacket 4 with two saw blades is installed, and on the outside of the steel jacket, a pipe fitting 3 is installed. Between these two is conical contact.

The connection process and principle are as follows. First remove the aluminum wire at the end of the steel cored aluminum strand, and secure the steel core 6 with a glass fiber tape (5), and the aluminum jacket from the body middle window (8) position Put it in. The conductor is inserted into the groove. Subsequently, the pipe fitting 3 is put in. A steel jacket 4 is inserted between the pipe fitting 3 and the steel core 6. Tap the steel jacket in place to clamp the steel core. At this point, the pipe fitting and the steel jacket are practically one. Move the pipe fittings again to attach the inner end firmly to the large end of the aluminum jacket, and pull the lead pipe fitting to push the aluminum jacket to work in the opposite direction. The inner diameter of the aluminum jacket gradually reduces the clamping of the conductors. Likewise, as the tension increases, this clamping force also increases. Aluminum jackets have saw blades, so aluminum jackets and conductors cannot slide. Even when the tension is very high, the steel core is clamped by the steel jacket, so there is no sliding movement on its own, but the pipe fittings will also force the aluminum jacket to move and clamp the conductor continuously. The present invention clearly has the advantage of conical tube clamping and solves the core-pulling problem of steel cores. At the same time, it overcomes the difficult problem of shrinking the size of the pipe.

Embodiment 2 refers to FIGS. 3 and 4. The difference from Example 1 is that the pipe fitting and the steel jacket are not conical joints. This must be clamped first, and the steel jacket (4) is two quenched parts with teeth, and the installation order is to first insert the conductor into the body groove to fit the pipe fitting (3) and then the steel jacket (4) again. do. This pipe fitting is a low carbon steel material. A hammer is used to aim the longitudinal plane P of the steel jacket and tap until it reaches a fixed size in the vertical direction. At this time, the saw blade of the steel jacket tightens the steel core. Pull the lead aluminum jacket to move in the opposite direction and clamp the lead.

Embodiment 3 refers to FIGS. 5 and 6. Two steel jackets 4 with quenched saw blades are fixed on the aluminum jackets via pins 9. The working principle of this embodiment is as follows. Lead wires and steel cores are inserted into the grooves of the aluminum jacket and the steel jacket respectively, and when the lead wires are pulled, the saw blades of the two jackets (aluminum jacket and steel jacket) tighten the diameter of their respective wires. At the same time, the greater the tension the conductor receives, the greater the clamping force.

Example 4 refers to FIG. Its structure consisted of two aluminum liners 10 of the body 1, wedge iron 11, pipe fittings 3 and a steel jacket 4. The pipe fitting and the pipe jacket are fixed on the steel core of the two ends of the conductor, one pipe fitting end is attached on the main body end, and the other pipe fitting end is attached on the wedge iron 11. After the conductor is forced, one end of the pipe fitting moves the wedge iron to clamp the lead, and the other end of the pipe fitting is blocked by the body, and the higher the tension, the greater the clamping force. When connecting the conductors, two aluminum liners are installed between the two stranded conductors to prevent damage to the conductors during movement between them. This structure can not only clamp the conductors but also obtain a good electric conduction effect.

Embodiment 5 refers to Figs. 8 and 9. Part 3 is a pipe fitting with a saw blade, and part 12 is a wedge iron with a saw blade. Inserting the lead steel core and tightening the wedge iron 12 allows the steel core to be tightened. The main body is a tin-aluminum part, and the window of the mounting disassembly part was installed in the middle.

Embodiment 6 refers to FIGS. 10 and 11. Bolted ears are installed on both sides of the steel jacket, and the two steel jackets are clamped on the steel core through the bolts 13. The main body is an aluminum casting with a window.

Embodiment 7 refers to FIG. Its clamping principle installs a pipe fitting with one inner cone on the steel core 6. Its structure first inserts a core expander 14 into the steel core and connects the steel core and the pipe fitting into one. The main body is an aluminum casting with a window.

Embodiment 8 refers to FIG. In order to prevent the sliding movement of the steel core to increase the single clamping structure again to fit the steel core, the pipe fittings are secured onto the aluminum jacket via bolts. The main body is a compressed conical tube and is used for connecting conductors of relatively small diameter size.

Example 9 refers to FIG. The present invention is applied on a tension clamp. The pipe fitting 3 and the steel jacket 4 are mounted on the steel core of the conductor and also clamped using this conical surface. The big end of the pipe fitting is in contact with the big end of the aluminum jacket.

In conclusion, the common features of each of the above-described embodiments are low labor intensity and high work efficiency. In addition, securing the safety of overhead distribution lines is of great importance in increasing economic effectiveness and social benefits.

While exemplary embodiments of the invention have been described with reference to the accompanying drawings, the invention is not limited to these exact embodiments, but various modifications and changes are intended to be within the spirit and scope of the invention as set forth in the following appended claims. It is apparent to those skilled in the art.

The present invention solves the problem that the steel core is not slipped between the aluminum wire and the wire, and the aluminum wire is pulled and broken, thereby ensuring safety distribution. In addition, the installation of the present invention is convenient, low labor intensity, no noise, improved construction. It also has the effect of improving production efficiency.

Claims (3)

In the apparatus for preventing the slip of the steel core in connecting a steel cored aluminum strand for processing power distribution, Connector body 1, aluminum jacket 2 with saw blades, pipe fittings 3, steel jacket 4 with saw blades, fixtures 9, 12, 13, 14 And steel core 6, The pipe fitting 3 and the steel jacket 4 are joined in a conical plane, The steel jacket 4 is firmly fixed to the steel core 6, The steel jacket 4 securely holds the steel core 6 by means of the fixtures 9, 12, 14 together with the pipe fitting 3, or The steel core 6 with ears is firmly fixed together with the fixing body 13, On the main body 1, a window 8 for such installation disassembly is provided. A device for preventing slippage of steel cores in connecting steel core-type aluminum strands for processing power distribution. The method of claim 1, Conical groove is installed in the pipe fitting (3), The outer cone of the steel jacket 4 and the conical groove of the pipe fitting 3 are combined with each other, The steel jacket 4 is composed of two conical plate structure, Saw blades are provided on the inner surface of the steel jacket (4) to increase the tightening force and is fitted on the steel core (4) A device for preventing slippage of steel cores in connecting steel core-type aluminum strands for processing power distribution. The method of claim 1, The steel jacket 4 consisting of two plates can be installed in a large groove at the end of the aluminum jacket 2 via a pin 9, A device for preventing slippage of steel cores in connecting steel core-type aluminum strands for processing power distribution.

Images