Special-shaped parallel groove clamp

Abstract

The utility model relates to the technical field of wire clamps, and particularly discloses a special-shaped parallel groove clamp which comprises an upper clamping plate and a lower clamping plate, the upper clamping plate is provided with two recessed upper half wire grooves, the lower clamping plate is provided with recessed lower half wire grooves in one-to-one correspondence with the upper half wire grooves, and the upper half wire grooves and the lower half wire grooves form wire grooves for clamping wires. The wire clamp further comprises at least one set of bolt and nut combination capable of enabling the clamping combination formed by the upper clamping plate and the lower clamping plate to be clamped and loosened, and further comprises a bolt positioning piece arranged at the head end of the fastening bolt, and the fastening bolt in the bolt and nut combination penetrates through the upper clamping plate and the lower clamping plate. When the wire clamp is installed, the bolt positioning piece can prevent the head of the fastening bolt from rotating, and the head of the fastening bolt is not separated from the bolt positioning piece. The bolt positioning piece can prevent the fastening bolt from rotating in the installation process of the wire clamp, the head of the fastening bolt is not separated in the installation process, and wiring installation operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of wire clamps, in particular to a special-shaped parallel groove wire clamp. Background Art

[0002] Special-shaped parallel groove wire clamps are wiring hardware in power lines, generally used for the connection and splicing of overhead wires with small and medium cross-sections. They are divided into copper special-shaped parallel groove wire clamps, aluminum special-shaped parallel groove wire clamps, and copper-aluminum special-shaped parallel groove wire clamps. They can be used for the clamping connection of wires with the same or different cross-sections. The installation position of special-shaped parallel groove wire clamps is generally set in places that do not bear force. Special-shaped parallel groove wire clamps generally include two clamping plates and at least one set of bolt and nut combinations. A positioning plate is provided at one end of the head of the fastening bolt, and the two clamping plates are clamped to clamp the wire through the bolt and nut combination. When installing special-shaped parallel groove wire clamps on overhead power lines, usually one end of the nut faces upwards and one end of the head of the fastening bolt faces downwards. The special-shaped parallel groove wire clamp is provided with a positioning plate for positioning the bolt, and the positioning plate is usually set on one side of the head of the fastening bolt. When in use, the electrician first loosens the nut to separate the two clamps by a certain distance, and then inserts the wire into the wire groove formed by the two clamps from the side, and then turns the nut to bring the two clamps closer, thereby clamping the two wires. When turning the nut to clamp the two clamps, the electrician holds the two clamps with one hand, and at the same time needs to use his fingers to support the head of the fastening bolt so that the head of the fastening bolt is located on the positioning plate, and turns the nut with the other hand. If the head of the fastening bolt is not supported by hand, when the nut is loosened, the head end of the fastening bolt will separate from the positioning plate under the action of gravity. At this time, the positioning plate loses its limiting effect on the fastening bolt, resulting in inconvenient installation operation. Utility Model Content

[0003] The utility model aims to solve the problem that the existing special-shaped parallel groove wire clamp needs to use fingers to hold the head of the fastening bolt during installation and use, which causes inconvenience in installation and use, and provides a special-shaped parallel groove wire clamp which is easy to operate during installation.

[0004] To solve the above technical problems, the utility model includes an upper clamping plate and a lower clamping plate for clamping and fixing the wires, the upper clamping plate is provided with two recessed upper half wire grooves for clamping and fixing the wires, the lower clamping plate is provided with a recessed lower half wire groove corresponding to the upper half wire grooves one by one, the upper half wire grooves and the lower half wire grooves form a wire groove for clamping the wires, the wire clamp also includes at least one set of bolt and nut combinations that can tighten and loosen the clamping combination formed by the upper clamping plate and the lower clamping plate, the fastening bolt in the bolt and nut combination passes through the upper clamping plate and the lower clamping plate, and its structural feature is: it also includes a bolt positioning piece arranged at the head end of the fastening bolt, and when the wire clamp is installed, the bolt positioning piece can prevent the head of the fastening bolt from rotating and the head of the fastening bolt does not separate from the bolt positioning piece.

[0005] After adopting the above structure, when using a special-shaped parallel groove wire clamp to connect and splice two wires, for the convenience of operation, the height of the wire clamp is equivalent to the chest height of the electrician when the special-shaped parallel groove wire clamp is installed, one end of the nut (i.e., the nut) faces upward, and the head end of the fastening bolt faces downward. After the bolt and nut combination is loosened and the wire is placed in the wire groove, use one hand (usually the left hand) to bring the upper clamping plate and the lower clamping plate close together, and make the bolt positioning piece lean against the clamping plate, use the force of the hand to make the upper clamping plate and the lower clamping plate clamp the two wires to prevent the wires from escaping from the wire groove, and then use the other hand (usually the right hand) to turn the nut to tighten the bolt and nut combination, and finally use a wrench to tighten the nut again, and use the tightening force of the bolt and nut combination to make the upper clamping plate and the lower clamping plate clamp the two wires. When tightening the special-shaped parallel groove wire clamp of the utility model, you can first lift the bolt locating piece at the head end of the fastening bolt upwards and lean it against the lower clamping plate, and use one hand (usually the left hand) to make the bolt locating piece lean against the lower clamping plate. At this time, the head of the fastening bolt and the bolt locating piece are not separated, and the bolt locating piece can prevent the fastening bolt from rotating. Use the other hand (usually the right hand) to turn the nut until it becomes difficult to turn the nut. At this time, the upper clamping plate and the lower clamping plate clamp the wire more tightly, and then use a wrench to turn the nut so that the upper clamping plate and the lower clamping plate clamp the wire. Since the bolt locating piece can prevent the head of the fastening bolt from rotating and the head of the fastening bolt cannot be separated from the bolt fastener, there is no need to use your fingers to hold the head of the fastening bolt when turning the nut for tightening, which facilitates the installation operation of the wire clamp.

[0006] The upper clamping plate is provided with upper through holes for the studs of the fastening bolts to pass through, and the lower clamping plate is provided with lower through holes corresponding to the upper through holes and for the studs of the fastening bolts to pass through.

[0007] The bolt positioning member includes a pressure plate, on which a long hole is formed for the stud of the fastening bolt to slide from the side of the pressure plate into the inside of the pressure plate, and the pressure plate is fixedly connected with a bolt limiting vertical plate which can prevent the head of the fastening bolt from rotating when the stud of the fastening bolt slides to the end of the long hole, and the bolt limiting vertical plate is fixedly connected with a bolt limiting horizontal plate which protrudes toward the head of the fastening bolt, and when the stud of the fastening bolt slides to the end of the long hole, the stud faces the upper through hole and the lower through hole.

[0008] A flat washer and a spring washer sleeved on the stud of the fastening bolt are arranged between the head of the fastening bolt and the pressing plate.

[0009] A flat washer and a spring washer which are sleeved on the stud of the fastening bolt are arranged between the nut and the clamping plate of the bolt-nut combination.

[0010] The clamping surfaces of the upper half wire trough and the lower half wire trough are provided with anti-slip textures which can increase the friction between the clamping surfaces and the wires.

[0011] The bolt and nut combination is provided with one set or two sets.

[0012] The bolt positioning piece in the special-shaped parallel groove wire clamp of the utility model can prevent the fastening bolt from rotating. During the installation process, the bolt positioning piece and the head of the fastening bolt do not separate. Therefore, when the wire clamp is installed and the nut (i.e., the nut) is twisted to clamp the wire by the upper clamping plate and the lower clamping plate, the fastening bolt cannot rotate. There is no need to support the head of the fastening bolt with hands to prevent it from rotating. Only the nut needs to be twisted, which facilitates the installation operation of the special-shaped parallel groove wire clamp. An elastic gasket is provided on the fastening bolt, which can enhance the holding force of the upper clamping plate and the lower clamping plate on the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of the wire clamp of the utility model;

[0014] Figure 2 This is a schematic diagram of the utility model after the various parts of the wire clamp are disassembled;

[0015] Figure 3 It is a side schematic diagram of the wire clamp assembly of the utility model;

[0016] Figure 4 (a) is a side view of the bolt locating part. Figure 4 (b) Figure 4 (a) A-direction view;

[0017] Figure 5 (a) Figure 4 (b) B-direction view, Figure 5 (b) Figure 4 (b) C-direction view;

[0018] Figure 6 It is a schematic diagram of the fastening bolt after sliding into the long hole of the bolt positioning member;

[0019] Figure 7 A schematic diagram of a wire clamp having a set of bolt and nut combinations;

[0020] Figure 8 (a) is a side view of a positioning plate in a prior art special-shaped parallel groove clamp. Figure 8 (b) Figure 8 (a) D-direction view;

[0021] In the figure: 1. upper clamping plate; 11. upper half wire groove; 12. upper through hole; 2. lower clamping plate; 21. lower half wire groove; 22. lower through hole; 3. bolt positioning piece; 31. pressure plate; 311. long hole; 32. bolt limiting vertical plate; 33. bolt limiting horizontal plate; 4. fastening bolt; 5. nut; 6. flat washer; 7. spring washer; 8. positioning plate; 81. side protrusion; 82. bolt hole. DETAILED DESCRIPTION

[0022] Reference Figure 1-6 A special-shaped parallel groove wire clamp includes an upper clamping plate 1 and a lower clamping plate 2 for clamping and fixing the wire. The upper clamping plate 1 and the lower clamping plate 2 form a clamping combination for the wire. The clamping combination formed by the upper clamping plate 1 and the lower clamping plate 2 is used to clamp and loosen the wire through a bolt and nut combination. The bolt and nut combination includes a fastening bolt 4 and a nut 5 (i.e., a nut) used in conjunction with the fastening bolt 4. The wire clamp also includes a bolt positioning member 3 that can prevent the fastening bolt 4 from rotating when the wire clamp is installed. Figure 2 , 3 As shown, the lower surface of the upper clamping plate 1 is provided with two upper half wire grooves 11 with recesses for clamping and fixing the wires, and the upper surface of the lower clamping plate 2 is provided with lower half wire grooves 21 with recesses corresponding to the upper half wire grooves 11. When the upper half wire grooves 11 and the lower half wire grooves 21 are close to each other, wire grooves for clamping the wires are formed. The clamping surfaces of the upper half wire grooves 11 and the lower half wire grooves 21 are provided with anti-slip textures (not shown in the figure) that can increase the friction between the clamping surfaces and the wires, so that the wire clamps clamp the wires more firmly. The anti-slip texture is a conventional setting of the clamping surface and is not described in detail here.

[0023] Reference Figure 1-6 The wire clamp includes two sets of bolt and nut combinations. An upper through hole 12 is provided on the upper clamping plate 1 for the stud of the fastening bolt 4 to pass through. A lower through hole 22 is provided on the lower clamping plate 2 for the stud of the fastening bolt 4 to pass through. The upper through hole 12 and the lower through hole 22 are arranged in a one-to-one correspondence. After the fastening bolt 4 passes through the upper through hole 12 and the lower through hole 22, it is used in conjunction with the nut 5 to control the clamping and loosening of the upper clamping plate 1 and the lower clamping plate 2. The bolt locator 3 is provided at the head end of the fastening bolt 4. Specifically, when the wire clamp is installed, the bolt locator 3 can prevent the head of the fastening bolt 4 from rotating and the head of the fastening bolt 4 does not separate from the bolt locator 3 during installation. Figure 1-6As shown, the bolt positioning member 3 includes a pressing plate 31, and a long hole 311 extending from the edge opening of the pressing plate 31 into the pressing plate 31 is respectively opened on both sides of the pressing plate 31, and the width of the long hole 311 is slightly larger than the diameter of the stud of the fastening bolt 4, and the stud of the fastening bolt 4 can slide into the long hole 311 from the side of the pressing plate 31, and the pressing plate 31 is fixedly connected with a bolt limiting vertical plate 32. When the stud of the fastening bolt 4 slides to the end of the long hole 311, the bolt limiting vertical plate 32 can prevent the head of the fastening bolt 4 from rotating. The end of the long hole 311 mentioned here refers to the closed end that prevents the stud of the fastening bolt 4 from continuing to slide, and the fastening bolt 4 It is a conventional hexagonal head bolt. When the stud of the fastening bolt 4 slides to the end of the long hole 311, one side of the hexagonal head of the fastening bolt 4 is close to the bolt limiting vertical plate 32, and the bolt limiting vertical plate 32 can prevent the head of the fastening bolt 4 from rotating; the bolt limiting vertical plate 32 is fixedly connected to a bolt limiting horizontal plate 33 protruding toward the head direction of the fastening bolt 4. When the stud of the fastening bolt 4 slides to the end of the long hole 311, the bolt limiting horizontal plate 33 can prevent the head of the fastening bolt 4 from disengaging from the bolt positioning member 3, that is, the bolt limiting horizontal plate 33 can prevent the fastening bolt 4 from sliding outward along the axial direction of the screw and disengaging from the bolt positioning member 3. Figure 1 As shown, the bolt limiting cross plate 33 can prevent the fastening bolt 4 from sliding downward. When the stud of the fastening bolt 4 slides to the end of the long hole 311, the stud faces the upper through hole 12 and the lower through hole 22, and the stud of the fastening bolt 4 can pass through the upper clamping plate 1 and the lower clamping plate 2.

[0024] Reference Figure 1-3 A flat washer 6 and a spring washer 7 are provided between the head of the fastening bolt 4 and the pressure plate 31, and a flat washer 6 and a spring washer 7 are provided between the nut 5 and the upper clamping plate 1. When the bolt and nut combination clamps the upper clamping plate 1 and the lower clamping plate 2, the spring washer 7 can increase the clamping force.

[0025] Assembly and use: When assembling the wire clamp, put a spring washer 7 and a flat washer 6 onto the stud of the fastening bolt 4, then slide the stud of the fastening bolt 4 from the open end of the long hole 311 along the long hole 311, slide the head of the fastening bolt 4, the flat washer 6, and the spring washer 7 into the space between the pressure plate 31 and the bolt limiting horizontal plate 33, and keep one side of the hexagonal head parallel to the bolt limiting vertical plate 32 when the fastening bolt 4 slides in. Install the two fastening bolts 4 onto the bolt positioning member 3 according to the above method. ; Then, the studs of the two fastening bolts 4 are passed through the lower through hole 22 and the upper through hole 12 in turn, and then a spring washer 7 and a flat washer 6 are put on the studs of the fastening bolts 4, and then the nut 5 is screwed onto the studs of the fastening bolts 4, and the nut 5 is twisted to make the upper clamp 1 and the lower clamp 2 fit together, without tightening with force, and then the special-shaped parallel groove wire clamp is placed in the insulating sleeve, and the insulating sleeve is used in conjunction with the special-shaped parallel groove wire clamp. Its structure is a prior art and does not belong to the scope of the utility model, and is not described in detail here. When the special-shaped parallel groove wire clamp of the utility model is used to connect and continue the overhead circuit, the special-shaped parallel groove wire clamp is taken out from the insulating sleeve, the nut 5 is loosened to separate the upper clamping plate 1 and the lower clamping plate 2 by a distance, one end of the nut 5 is facing upward, the head end of the fastening bolt 4 is facing downward, the height of the wire clamp is close to the chest height of the electrician, two wires are inserted into the wire groove formed by the upper half wire groove 11 and the lower half wire groove 21, and then the upper clamping plate 1 and the lower clamping plate 2 are closed by hand to pre-fix the wires to prevent the wires from falling out of the wire clamp. Out, put the bolt positioning piece 3 against the lower clamping plate 2, at this time use one hand (usually the left hand) to pre-fix the position of the upper clamping plate 1, the lower clamping plate 2, and the bolt positioning piece 3, so that the bolt positioning piece 3 does not fall, and use the other hand (usually the right hand) to twist the nut 5 until the bolt and nut combination fixes the relative position of the upper clamping plate 1, the lower clamping plate 2, and the bolt positioning piece 3, and then tighten the nut 5 with a wrench, the wire is clamped and fixed to meet the wiring requirements, and then the insulating sleeve is put on the outside of the wire clamp to complete the wiring. When using the wire clamp of the utility model for wiring, the head of the fastening bolt 4 and the bolt positioning piece 3 are movable at the same time and will not be separated, so the bolt limiting vertical plate 32 of the bolt positioning piece 3 can always prevent the fastening bolt 4 from rotating, and there is no need to use fingers to press against the head of the fastening bolt 4 when twisting the nut 5 for tightening operation, making the installation operation of the wire clamp simpler. When installing the special-shaped parallel groove wire clamp, the nut 5 end faces upward because the nut 5 needs to be tightened with a wrench at the end. If the nut 5 faces downward, it is inconvenient to tighten it with a wrench.

[0026] Figure 7 This is a schematic diagram of a special-shaped parallel groove wire clamp with only one set of bolts and nuts. Figure 1-6 Compared with the wire clamp, only one set of bolt and nut combination is provided, only one long hole 311 is provided on the pressure plate 31, only one bolt limiting vertical plate 32 and one bolt limiting horizontal plate 33 are provided, and the method of use is the same as the above-mentioned wire clamp, which will not be described in detail here.

[0027] Figure 8 It is a schematic diagram of a positioning plate 8 in a special-shaped parallel groove wire clamp in the prior art. The difference between the special-shaped parallel groove wire clamp in the prior art and the utility model is that a bolt positioning member 3 is not provided, but a positioning plate 8 is adopted. Two bolt holes 82 are provided on the positioning plate 8, and the studs of the fastening bolts 4 can pass through the bolt holes 82. Side protrusions 81 are provided on both sides of the length direction of the positioning plate 8. When the wire clamp is installed, the head of the fastening bolt 4 is located between the two side protrusions 81 to prevent the fastening bolt 4 from rotating when the nut 5 is turned. The disadvantage is that the head of the fastening bolt 4 needs to be supported by a finger, otherwise the fastening bolt 4 will fall downward under the action of gravity and separate from the positioning plate 8, and the positioning plate 8 cannot prevent the fastening bolt 4 from rotating.

[0028] The utility model prevents the fastening bolt from rotating when the special-shaped parallel groove wire clamp is installed by arranging the bolt positioning piece, and the head of the fastening bolt does not separate from the bolt positioning piece during the installation process, thereby facilitating the wiring installation operation of the wire.

Claims

1. A special-shaped parallel groove wire clamp, comprising an upper clamping plate (1) and a lower clamping plate (2) for clamping and fixing a wire, the upper clamping plate (1) being provided with two recessed upper half wire grooves (11) for clamping and fixing the wire, the lower clamping plate (2) being provided with recessed lower half wire grooves (21) corresponding one to one with the upper half wire grooves (11), the upper half wire grooves (11) and the lower half wire grooves (21) forming a wire groove for clamping the wire, the wire clamp further comprising at least one set of bolt and nut combinations capable of clamping and loosening the clamping combination formed by the upper clamping plate (1) and the lower clamping plate (2), the fastening bolts (4) in the bolt and nut combinations passing through the upper clamping plate (1) and the lower clamping plate (2), wherein: It also includes a bolt positioning piece (3) arranged at the head end of the fastening bolt (4); when the wire clamp is installed, the bolt positioning piece (3) can prevent the head of the fastening bolt (4) from rotating and the head of the fastening bolt (4) does not separate from the bolt positioning piece (3).

2. The special-shaped parallel groove clamp according to claim 1 is characterized in that: The upper clamping plate (1) is provided with an upper through hole (12) through which a stud for fastening the bolt (4) passes, and the lower clamping plate (2) is provided with a lower through hole (22) corresponding to the upper through hole (12) and through which a stud for fastening the bolt (4) passes.

3. The special-shaped parallel groove clamp according to claim 2 is characterized in that: The bolt positioning member (3) comprises a pressing plate (31), the pressing plate (31) being provided with a long hole (311) for a stud of a fastening bolt (4) to slide from a side of the pressing plate (31) into the pressing plate (31), the pressing plate (31) being fixedly connected with a bolt limiting vertical plate (32) capable of preventing the head of the fastening bolt (4) from rotating when the stud of the fastening bolt (4) slides to the end of the long hole (311), the bolt limiting vertical plate (32) being fixedly connected with a bolt limiting horizontal plate (33) protruding toward the head of the fastening bolt (4), and when the stud of the fastening bolt (4) slides to the end of the long hole (311), the stud faces the upper through hole (12) and the lower through hole (22).

4. The special-shaped parallel groove clamp according to claim 3 is characterized in that: A flat washer (6) and a spring washer (7) sleeved on the stud of the fastening bolt (4) are provided between the head of the fastening bolt (4) and the pressure plate (31).

5. The special-shaped parallel groove clamp according to claim 4 is characterized in that: A flat washer (6) and a spring washer (7) sleeved on the stud of the fastening bolt (4) are provided between the nut (5) of the bolt-nut combination and the clamping plate.

6. The special-shaped parallel groove clamp according to claim 1, characterized in that: The clamping surfaces of the upper half wire groove (11) and the lower half wire groove (21) are provided with anti-slip textures capable of increasing the friction between the clamping surfaces and the wires.

7. The special-shaped parallel groove clamp according to claim 1 is characterized in that: The bolt and nut combination is provided with one set or two sets.

Images