CN101741030A - Cable end grounding wire device - Google Patents

Abstract

A cable head grounding wire device. It relates to a safety protection device for power cable maintenance. It includes a grounding wire, a support frame, and an insulating clamping head device that is movably connected with the supporting frame; the insulating clamping head device includes an insulating rod, a clamping head, and an opening and closing mechanism; the clamping head includes a body and a clamping block, and the clamping block is arranged on the concave of the C-shaped body. In the mouth, the opening and closing mechanism includes a spring, a guide rod, a soft cable, a pull rod, and a crank mechanism; the body and the insulating rod are connected through an elbow, the guide rod is fixedly connected to the back of the clamp block, and the spring is arranged on the guide rod between the clamp block and the body ; After the guide rod extends into the elbow, it is fixedly connected with the pull rod arranged in the insulating rod through a soft cable; the crank mechanism is arranged at the lower part of the insulating rod, including a crank type wrench and a wrench bracket, and the wrench bracket is arranged outside the insulating rod, and the crank type wrench is in the middle It runs through the insulating rod and is hinged with the pull rod, the straight handle end is hinged with the wrench bracket to form a fixed fulcrum, and the grounding wire is connected to the body. The invention has exquisite conception and high reliability.

Description

A cable head grounding wire device

technical field

The invention relates to a safety protection device for power cable maintenance, in particular to a cable head grounding wire device for maintenance of user cables.

Background technique

In the normal power line and user power equipment maintenance work, it is often necessary to disassemble the connection joint between the power cable and the overhead line. At this time, safety measures should be taken on the power cable head (cable lug). The reason is that although the cable head at the disconnected user end has lost power, many users have their own generators. These disconnected cable ends will be charged, and then endanger the life safety of maintenance personnel. Because most of the power cable heads entering the user's place are arranged in a vertical direction, they cannot bear gravity, and the ground wire has a certain weight, making it difficult for the cable lug to support the weight of the ground wire. For this reason, when running into similar situations, maintenance personnel are powerless to this, mostly allow the user end cable head that disassembles to be exposed outside without adding any protective measures. At present, the ordinary grounding wire hanger has a horizontal hanging opening, which cannot adapt to such a use environment, and it is impossible to add a grounding wire to the power cable head with the wire head and the wire nose facing upward.

Contents of the invention

In view of the above problems, the present invention provides a cable head grounding wire device that can hang a grounding wire on the power cable head with the wire head and the wire nose facing upwards, thereby ensuring the safety of maintenance personnel.

The technical solution of the present invention is: comprising a grounding wire, which also includes a support frame and an insulating clamping head device movably connected with the support frame; the support frame is fixedly connected to the pole of the user's cable; the insulating clamping head device It includes a hollow insulating rod, a clamping head, and an opening and closing mechanism; the clamping head includes a body and a clamping block. The body is C-shaped and arranged in a horizontal direction. The clamping block is set in the notch of the C-shaped body and can move relative to the body; opening and closing The mechanism includes a spring, a guide rod, a soft cable, a pull rod, and a crank mechanism; the body and the insulating rod are connected by an elbow at an angle of 45 to 160°, the guide rod is fixedly connected to the back of the clamp block, and the spring is arranged between the clamp block and the body on the guide rod between them; after the guide rod extends into the elbow, it is fixedly connected with the pull rod set in the insulating rod through a soft cable; the crank mechanism is arranged at the lower part of the insulating rod, including a crank type wrench and a wrench bracket, and the wrench bracket is set on the insulating rod Externally, the middle part of the crank wrench runs through the insulating rod and is hinged with the pull rod, the straight handle end is hinged with the wrench bracket to form a fixed fulcrum, and the grounding wire is connected to the body.

The elbow is a universal elbow.

Friction surfaces are provided on the corresponding surfaces of the body and the clamping block.

Under the action of the opening and closing mechanism, the clamping head of this new type of cable head grounding wire device provided by the present invention can reliably clamp the cable head or wiring nose in the vertical direction. When operating, only need to pull the opening and closing The crank type wrench of the mechanism, through the pull rod, soft cable and guide rod, overcomes the spring and applies a pressure from the back of the clamp block to make the front of the clamp block closely fit the corresponding end surface in the body under normal conditions, so that the front of the clamp block corresponds to the body The inner end surfaces are separated, so that the cable head can be extended into the separated space; after the crank wrench is loosened, the front of the clamp block fits with the corresponding end surface in the body, thereby clamping the cable head. The ground wire is connected to the metal body to ensure a conductive connection with the user's cable head. The matching support frame that can be fixed on the utility pole is used to support the ground wire devices of each cable head in the air. The invention solves the difficult problem existing in the prior art, even if the user reverses the power transmission, the safety of maintenance personnel will not be endangered. The invention has exquisite conception and high reliability.

Description of drawings

Fig. 1 is a structural representation of the present invention

In the figure, 1 is the clamp block, 2 is the spring, 3 is the body, 4 is the guide rod, 5 is the elbow, 6 is the soft cable, 7 is the pull rod, 8 is the insulating rod, 9 is the moving fulcrum, 10 is the wrench, 11 is the Ground wire, 12 is a support, 13 is a fixed fulcrum, and 14 is a handle;

Figure 2 is the right side view of Figure 1

Figure 3 is a top view of Figure 1

Among the figure, 15 is a guiding mechanism, 16 is a friction surface, and 17 is a groove;

Fig. 4 is the use status of the present invention with reference to Fig. 1

18 among the figure is subscriber line;

Fig. 5 is the use status of the present invention with reference to Fig. 2

19 is a bracing frame among the figure, and 20 is an electric pole.

Detailed ways

As shown in Figures 1 to 3, the present invention includes a ground wire 11, which also includes a support frame 19, an insulating clamping head device that is movably connected to the support frame 19; the support frame 19 is fixedly connected to the pole 20 of the user's cable; the insulating clamp The wire head device includes a hollow insulating rod 8, a clamping head, and an opening and closing mechanism; the clamping head includes a body 3 and a clamping block 1, and the body 3 is in a C shape, arranged in a horizontal direction, and the clamping block 1 is arranged in the notch of the C-shaped body 3, and It can move relative to the main body 3; the opening and closing mechanism includes a spring 2, a guide rod 4, a soft cable 6, a pull rod 7, and a crank mechanism; the main body 3 and the insulating rod 8 are connected through an elbow 5, and the angle between them is 45-160°. The guide rod 4 is fixedly connected to the back of the clamp block 1, and the spring 2 is arranged on the guide rod 4 between the clamp block 1 and the body 3; The pull rod 7 is fixedly connected; the crank mechanism is arranged on the lower part of the insulating rod 8, including a crank wrench 10 and a wrench bracket 12. The wrench bracket 12 is arranged outside the insulating rod 8, and the middle part of the crank wrench 10 runs through the insulating rod 8 and is hinged with the pull rod 7 to form a Moving fulcrum 9, the straight handle end of crank type wrench 10 is hinged with wrench support 12 to form fixed fulcrum 13. The ground wire 11 is connected to the body 3 .

The elbow 5 can be adopted as a universal elbow. In order to meet the requirements of setting angles of different user lines 18.

A friction surface 16 is provided on the corresponding surfaces of the main body 3 and the clamping block 1 to improve the clamping effect. A groove 17 may also be provided on one or both of the corresponding surfaces, so as to adapt to the application of clamping round cables.

When the present invention is in use, as shown in Figures 4 and 5, the insulating clamp head device is opened and closed in the horizontal direction. Under normal circumstances, the body 3 and the clamp block 1 are in a closed state (the spring 2 applies a clamp block from the back of the clamp block 1) 1 The pressure that the front side and the corresponding end surface in the body 3 are in close contact under normal conditions). Using the principle of mechanics, through mechanical transmission, when the grounding wire 11 is installed, the clamp block 1 is opened by the external force exerted by the human body on the crank wrench 10, and after clamping the user line 18, the wrench 10 is sent away to restore the original state to achieve clamping. The purpose of the cable head of residential line 18.

The support frame 19 is similar to a cross-arm shape, and a fixing device is arranged on the side. Before installing the grounding wire 11, install it on the pole 18 at a distance of 0.7m from the power cable head. After the electrical inspection and grounding, insert the handle 14 at the lower end of the insulating rod 8 of the grounding wire 11 into the socket of the support frame 19, and the grounding wire 11 The weight of all acts on support frame 19 thus, makes the power cable end of subscriber line 20 not bear gravity, has guaranteed the safe distance of human body and live part simultaneously.

Claims (3)

1. a cable end grounding wire device comprises earth connection, it is characterized in that the insulation wire clamping head device that it also comprises bracing frame, flexibly connects with bracing frame; Described bracing frame is fixedly connected on the electric pole of service cable; Described insulation wire clamping head device comprises insulating bar, clamp head, the open-and-close mechanism of hollow; The clamp head comprises body, fixture block, the c-shaped shape of body, and the horizontal direction setting, fixture block is arranged in the recess of C shape body, and can move with respect to body; Open-and-close mechanism comprises spring, guide rod, soft rope, pull bar, crank mechanism; Body links to each other by elbow with insulating bar, is 45～160 ° of angles each other, and guide rod is fixedly connected on the fixture block back side, and spring is arranged on the guide rod between fixture block and the body; Guide rod is fixedly linked by soft rope and the pull bar that is arranged in the insulating bar after stretching into elbow; Crank mechanism is arranged on the insulating bar bottom, comprises crank-type spanner, spanner support, and the spanner support is arranged on the insulating bar outside, and insulating bar and hinged with pull bar is run through at crank-type spanner middle part, and fulcrum is decided in staight shank end and the hinged formation of spanner support, and earth connection connects body.

2. a kind of cable end grounding wire device according to claim 1 is characterized in that, described elbow is universal elbow.

3. a kind of cable end grounding wire device according to claim 1 is characterized in that the corresponding surface of described body, fixture block is provided with rubbing surface.

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