CN211556796U - Bolt-free wedge-shaped strain clamp - Google Patents
Bolt-free wedge-shaped strain clamp Download PDFInfo
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- CN211556796U CN211556796U CN202020285369.2U CN202020285369U CN211556796U CN 211556796 U CN211556796 U CN 211556796U CN 202020285369 U CN202020285369 U CN 202020285369U CN 211556796 U CN211556796 U CN 211556796U
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Abstract
A boltless wedge type strain clamp comprising: the cable clamp comprises a cable clamp body, a wedge block, a dustproof cover and a fixing structure; the wire clamp main body consists of a hollow wire pipe with openings at two ends and a sealing sliding block; the line pipe is of a cone structure; the upper side of the wire pipe is provided with a wire releasing notch, the inner side of the wire pipe is provided with three wedge grooves, and two convex ends are fixedly arranged on two outer sides of the wire pipe respectively; the upper part of the sealing slide block is embedded with the paying-off notch, and two sides of the lower part of the sealing slide block extend outwards respectively; the bottom of the sealing sliding block is provided with a wedge groove; the wedge block is arranged in the wedge grooves on the inner sides of the wire pipe and the sealing slide block; the dustproof cover is of a round hollow structure and is divided into an upper part and a lower part; the fixing structure comprises a connecting rod and cylindrical stop blocks arranged at two end parts of the connecting rod; the connecting rod is composed of two parallel and symmetrical rod pieces and a symmetrical middle connecting piece. The utility model discloses thereby can improve because voussoir and wire surface stress are too concentrated and damage insulated wire insulating layer, cause the problem that insulated wire slided.
Description
Technical Field
The utility model belongs to the technical field of the electric power fitting, in particular to no bolt wedge type strain clamp.
Background
The strain clamp in the electric power fitting is one of fittings which have extremely deep influence on the safe operation of an electric power line, is widely applied and relates to various voltage grades. According to the wire fixing mode, the strain clamp is mainly divided into three types: one is compression type strain clamp, and the other two are wedge type strain clamp and bolt type strain clamp. The compression type strain clamp enables the lead and the steel anchor to be in compression joint, can bear larger lead tension and is suitable for high-voltage or ultrahigh-voltage lines; the bolt type strain clamp has moderate holding power performance and is suitable for medium and low voltage lines; the wedge-shaped strain clamp is simple to install, but has the worst grip performance, and is suitable for low-voltage lines of a power distribution network.
Along with the large-area application of the insulated conductor in the urban distribution network, in order to avoid damaging the insulated conductor insulating layer, the bolt type strain clamp needs to strip the conductor during installation, and the installation is inconvenient. Although the wedge-shaped strain clamp does not need to strip the conductor when being installed, the structural design of the existing wedge-shaped strain clamp is not perfect, the stress on the inner side of a wedge block and the surface of the conductor is too concentrated, the insulating layer is deformed, and the conductor slides. Meanwhile, the existing wedge-shaped strain clamp is limited by the quality of installation personnel due to the fact that a bolt fixing structure is adopted, the installation of the bolt cannot ensure that two ends are symmetrical, and the problems that one side of a connecting rod is deformed and a surface coating is damaged occur in the service process of the wedge-shaped strain clamp are solved.
Disclosure of Invention
Based on the not enough of above-mentioned prior art, the utility model provides a no bolt wedge type strain clamp for thereby improve because voussoir and wire surface stress are too concentrated and damage the insulated wire insulating layer, cause the problem that insulated wire slided, solve simultaneously that wedge type strain clamp bolt installation is asymmetric, the not hard up problem of bolt.
The utility model discloses a realize through following technical scheme.
A boltless wedge type strain clamp comprising:
the wire clamp comprises a wire clamp body, a wire clamp body and a sealing sliding block, wherein the wire clamp body is hollow and consists of a wire pipe with two open ends and the sealing sliding block; the line pipe is of a cone structure, one end of the line pipe is of a large caliber, and the other end of the line pipe is of a small caliber; the upper side of the wire pipe is provided with a wire releasing notch, the inner side of the wire pipe is provided with three wedge grooves, two outer sides of the wire pipe are respectively fixedly provided with a protruding end, and the protruding ends are respectively provided with a hole; the upper part of the sealing sliding block is embedded with the pay-off notch, and two sides of the lower part of the sealing sliding block respectively extend outwards to form two sliding chutes capable of sliding on the bobbin; the bottom of the sealing sliding block is provided with a wedge groove; particularly, the wedge grooves in the wire clamp main body of the utility model are arranged in four directions, namely, up, down, left and right directions, at the inner side of the wire clamp main body; the small-caliber side of a wire pipe in the wire clamp main body faces to the tension direction of a wire, and the side of a wire releasing notch faces upwards. The sealing sliding block is fixed by upward stress given by the wedge block and reverse stress given by the wire pipe.
The four wedge blocks are completely consistent in length, wedge angle and the like and are respectively arranged in wedge grooves on the inner sides of the wire pipes and the inner sides of the sealing sliding blocks; the wedge block placing direction is consistent with the angle inclination direction of the line pipe; the inner side (arc groove side) of the wedge block faces inwards along the radial direction of the wire pipe and is contacted with the wire. The utility model discloses a be circular well siphunculus after strain clamp installation is accomplished.
The dustproof cover is of a circular hollow structure and is divided into an upper part and a lower part, and the upper part and the lower part are arranged at one end of the wire pipe; the dustproof cover is vertical to the wire pipe and is arranged on the large-caliber side from bottom to top; after the wire clamp is installed, the wire clamp is placed at the large-caliber end of the wire pipe, so that impurities such as dust and the like are prevented from falling into the wire clamp to a certain extent;
the fixing structure comprises a connecting rod and cylindrical stop blocks arranged at two end parts of the connecting rod; the connecting rod is composed of two parallel and symmetrical rod pieces and a symmetrical middle connecting piece; the cylindrical stop block is perpendicular to the hole on the convex end outside the wire tube and is hung at the insulator end of the tower.
Preferably, two limiting bulges are arranged on the small-caliber side inside the wire pipe and close to the pay-off notch, so as to limit the displacement of the sealing sliding block; the inside heavy-calibre side of spool is provided with three spacing recess.
Preferably, the dustproof cover is a round hollow thin plate with a notch, and three buckles are vertically arranged on one surface of the dustproof cover; the radian of the notch of the dustproof cover is the same as that of the bottom of the sealing sliding block; the dust cap material is the same as the wedge material.
Preferably, three buckles on the dust cover can correspond the lock with the three spacing recess that the spool was inside to be set up.
Preferably, the holes on the protruding end are vertically formed, and semicircular grooves are formed in two sides of the hole on the rear side (i.e. one side in the pulling direction of the lead) of the protruding end, and the semicircular grooves can be embedded with the cylindrical stop block.
Preferably, the two protruding ends are provided with holes: one hole is of a fully closed structure, and the other hole is of a semi-closed structure with an opening at the lower section.
Preferably, the three buckles are arranged on the dust cover at equal intervals; the three limiting grooves are arranged in the wire tube at equal intervals.
Preferably, the joint of the upper part and the lower part of the dust cover is arranged to be in oblique angle connection.
Preferably, the wedge groove has a length less than a length of the clip body.
Preferably, the strain clamp does not have a bolt fixing structure in all structures.
Has the advantages that:
1) the utility model adopts the wire clamp main body which is different from the traditional semi-closed structure, and through the combination of the wire tube, the sealing slide block and the four wedge blocks, the stress concentration phenomenon (under the same wire tension condition, the more concentrated the stress line, the more concentrated the stress in the area) formed by the main body, the wedge blocks and the surface of the insulated wire in the service process of the original wedge-shaped tension-resistant wire clamp is improved, and the occurrence of the phenomena of damage and wire sliding of the insulated wire insulating layer is avoided; according to the finite element simulation result, the method comprises the following steps: when the original wedge-shaped tension-resistant wire clamp is used for fixing a lead, stress is gathered at the front end of the inner side of the wedge block, and the grip of the lead is basically zero at the rear end, namely, friction force is provided only by one part of the grip surface of the lead by the wedge block, so that the grip performance of the wedge-shaped tension-resistant wire clamp is restricted; after the structural design of the utility model is adopted, the simulation result shows that the stress distribution on the surfaces of the wedge block and the wire is uniform, and under the same grip performance, the maximum pressure value on the surface of the insulated wire is obviously reduced, and the damage degree of the insulating layer of the wire is obviously reduced; meanwhile, the aging speed of the wedge block with improved stress is correspondingly reduced, and the service life of the wedge-shaped strain clamp is prolonged to a certain extent;
2) the utility model has no fixing structure such as bolt, and achieves good fixing effect only depending on the interaction force among the parts, the lead and the fixed end of the pole tower, the installation is simple, and the utility model is not limited by the quality of the installation personnel basically; the design of the cylindrical stop block at the end part of the connecting rod can ensure that the connecting rod and the wire clamp main body have angle difference, thereby meeting the requirements of different conductor sag;
3) the utility model discloses in be provided with the shield, slow down to a certain extent and receive filthy process in the wedge type strain clamp main part, delay the voussoir speed of ageing.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is an exploded view of the present invention;
FIG. 3 is an enlarged view of the inside of the cleat body (spool);
FIG. 4 is a schematic view of the overall structure of the dust cap;
FIG. 5 is a schematic view of the overall structure of the closure slider;
FIG. 6 is a schematic view of a wire clamp body;
fig. 7 is a schematic view of an original wedge-shaped strain clamp.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and all the materials, instruments or equipment are conventional products which can be obtained by purchasing.
Referring to fig. 1-6, the present invention provides a bolt-free wedge-shaped strain clamp, which includes: fastener main part 1, voussoir 2, shield 3 and fixed knot construct 4, wherein:
the wire clamp main body 1 consists of a hollow wire pipe 11 with two open ends and a sealing slide block 12; the line pipe 11 is of a cone structure, one end of the line pipe is of a large caliber, and the other end of the line pipe is of a small caliber; the upper side of the line pipe 11 is provided with a line releasing gap 19, the inner side of the line pipe 11 is provided with three wedge grooves 13, and two convex ends 14 are respectively fixedly arranged at two outer sides; the protruding ends 14 are all provided with a hole 17; the upper part of the sealing slide block 12 is embedded with the paying-off notch 19, and two sides of the lower part of the sealing slide block respectively extend outwards to form two sliding chutes capable of sliding on the wire tube; the bottom of the sealing slide block 12 is provided with a wedge groove 13; the wedge groove sets up four directions about fastener main part inboard, enables the grip that the wire receives like this and evenly unanimous on same length, utilizes circular major structure to improve original wedge type fastener stress too concentrated's problem simultaneously, and the wedge groove makes the voussoir can not squint or reverse movement at installation and labour in-process.
The closing slider 12 is fixed by the upward stress given by the wedge and the reverse stress given by the spool. When the sealing device is installed, the sealing sliding block is contacted with the limiting bulge on the inner side of the line pipe; after the installation, there is not great gap between the slider and the spool. By adopting the technology, the sealing sliding block is not required to be fixed by structures such as bolts or hinges, and the wire clamp main body can be stably in a round favorable structure only by utilizing the interaction force of other parts and the limiting bulges.
The four wedge blocks 2 are respectively arranged in wedge grooves 13 on the inner sides of the line pipe 11 and the sealing slide block 12; the dustproof cover 3 is of a circular hollow structure and is divided into an upper part and a lower part which are arranged at one end of the line pipe 11, and the joint of the upper part and the lower part of the dustproof cover 3 is arranged to be in oblique angle connection; a buckle is arranged right below the inner side of the lower semicircular dustproof cover, and two symmetrical buckles are arranged on the inner side of the upper semicircular dustproof cover; the fixed structure 4 comprises a connecting rod 41 and cylindrical stoppers 42 arranged at two ends of the connecting rod 41; the connecting rod 41 is formed by two parallel and symmetrical rod pieces plus a symmetrical middle connecting piece.
Furthermore, two limiting protrusions 15 are arranged on the small-caliber side inside the line pipe 11 and close to the line releasing notch 19 to limit the displacement of the sealing slide block 12; three limiting grooves 16 are arranged on the large-caliber side in the conduit 11.
Furthermore, the dust cover 3 is a round hollow thin plate with a notch, and three buckles 31 are vertically arranged on one surface of the dust cover; the radian of the gap 32 of the dustproof cover 3 is the same as that of the bottom of the sealing slide block 12; the dust cap material is the same as the wedge material.
Specifically, three buckles 31 on the dust cover 3 can be correspondingly buckled with three limiting grooves 16 arranged inside the line pipe 11; more specifically, the three catches 31 are arranged on the dust cover 3 at equal intervals; the three limiting grooves 16 are arranged in the conduit 11 at equal intervals.
Furthermore, the holes 17 on the protruding end 14 are vertically formed, and semicircular grooves 18 are formed on both sides of the hole 17 on the rear side of the protruding end 14, i.e. on one side in the pulling direction of the lead, and the semicircular grooves 18 can be embedded with the cylindrical stopper 42. Specifically, two protruding ends 14 are provided with holes 17: one hole is of a fully closed structure, and the other hole is of a semi-closed structure with an opening at the lower section.
Further, the length of the wedge groove 13 is smaller than that of the clip body 1.
Further, the utility model discloses a strain clamp does not all contain bolt fastening structure in all structures. The fixing between the connecting rod and the wire clamp main body does not need bolts and other structures which are possibly loosened along with the increase of service time. Meanwhile, there is a margin of change in the angle of inclination of the connecting rod in the direction perpendicular to the wires.
The installation process of the present invention will be further explained below.
1) Before the wire clamp main body is installed, the appearance and the shape of a wire pipe and a sealing slide block are firstly checked, whether the surface is smooth or not is checked, whether defects such as potholes, indentations or bulges exist or not is checked, then the wedge block is checked, whether problems such as different sizes among wedge blocks and cracks on the surface of the wedge block exist or not are checked, if quality problems exist, the installation must be stopped, qualified parts are replaced, and after the parts are checked to be correct, the subsequent installation is carried out;
2) the paying-off notch of the line pipe in the line clamp main body is placed upwards in the positive direction, then three wedge blocks are placed in three wedge grooves on the inner side of the line pipe, and the circular grooves of the wedge blocks face inwards, so that the wedge blocks are uniformly contacted with the insulated conducting wires; placing the insulated wire into the wire tube from the wire tube paying-off notch, placing the fourth wedge block on the wire, and enabling the circular groove of the wedge block to face the insulated wire during placement;
3) sliding the sealing sliding block into a pay-off notch from the large-diameter position of the spool along the tension direction of the guide wire, and naturally embedding the fourth wedge block into a wedge groove of the sealing sliding block; continuously sliding the sealing sliding block into the paying-off notch until the sealing sliding block is tightly contacted with the limiting bulge on the inner side of the spool;
4) the four wedge blocks and the sealing slide block are tightly knocked, whether the installation of the wire clamp main body is firm or not is checked, and if the installation is still loose, the four wedge blocks and the sealing slide block are continuously knocked until parts of the wire clamp main body cannot shake;
5) erecting a cylindrical stop block at one end part of the fixed structure, and enabling the cylindrical stop block to pass through a protruding end provided with a fully-closed hole; rotating the fixing structure to enable the cylindrical stop block at the other end part of the fixing structure to enter the protruding end provided with the semi-closed hole; then the fixed structure is pulled to the opposite direction of the pulling force of the lead until the cylindrical stop block is embedded into the semicircular grooves arranged on the two sides of the hole, and at the moment, the angle of the fixed structure can be adjusted according to the lead sag;
6) installing the semicircular dustproof cover on the lower side on the large-caliber side of the line pipe, and then installing the semicircular dustproof cover on the upper side, wherein during installation, a buckle on the dustproof cover needs to be ensured to enter a limiting groove on the inner side of the line pipe;
7) and finally, checking whether the installation is qualified, such as whether the lead is clamped by the wedge block, whether the end of the connecting rod cylinder is embedded into the groove, whether the dust cover is well fixed and the like.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a no bolt wedge type strain clamp which characterized in that, the fastener includes:
the wire clamp comprises a wire clamp body (1), wherein the wire clamp body (1) consists of a hollow wire pipe (11) with two open ends and a sealing sliding block (12); the line pipe (11) is of a cone structure, one end of the line pipe is of a large caliber, and the other end of the line pipe is of a small caliber; a pay-off notch (19) is formed in the upper side of the spool (11), three wedge grooves (13) are formed in the inner side of the spool (11), and a protruding end (14) is fixedly arranged on each of the two outer sides of the spool; the protruding ends (14) are provided with a hole (17); the upper part of the sealing sliding block (12) is embedded with the paying-off notch (19), and two sides of the lower part of the sealing sliding block extend outwards respectively; the bottom of the sealing sliding block (12) is provided with a wedge groove (13);
the four wedge blocks (2) are respectively arranged in wedge grooves (13) on the inner sides of the line pipe (11) and the sealing sliding block (12);
the dustproof cover (3) is of a circular hollow structure and is divided into an upper part and a lower part, and the upper part and the lower part are arranged at one end of the line pipe (11);
the fixing structure (4) comprises a connecting rod (41) and cylindrical stop blocks (42) arranged at two end parts of the connecting rod (41); the connecting rod (41) is composed of two parallel and symmetrical rod pieces and a symmetrical middle connecting piece.
2. The boltless wedge type strain clamp of claim 1, wherein: two limiting bulges (15) are arranged on the small-caliber side in the line pipe (11) and close to the line releasing notch (19); three limiting grooves (16) are arranged on the large-caliber side in the line pipe (11).
3. The boltless wedge type strain clamp of claim 2, wherein: the dustproof cover (3) is a round hollow thin plate with a notch, and three buckles (31) are vertically arranged on one surface of the dustproof cover; the radian of the gap (32) of the dust cover (3) is the same as that of the bottom of the sealing slide block (12).
4. The boltless wedge type strain clamp of claim 3, wherein: three buckles (31) on the dust cover (3) can be correspondingly buckled with three limiting grooves (16) arranged inside the line pipe (11).
5. The boltless wedge type strain clamp of claim 1, wherein: the hole (17) on the protruding end (14) is vertically arranged, semicircular grooves (18) are arranged on two sides of the hole (17) on the rear side of the protruding end (14), and the semicircular grooves (18) can be embedded with the cylindrical stop block (42).
6. The boltless wedge type strain clamp of claim 1 or 5, wherein: in the holes (17) opened on the two protruding ends (14): one hole is of a fully closed structure, and the other hole is of a semi-closed structure with an opening at the lower section.
7. The boltless wedge type strain clamp of claim 4, wherein: the three buckles (31) are arranged on the dust cover (3) at equal intervals; the three limiting grooves (16) are arranged inside the line pipe (11) at equal intervals.
8. The boltless wedge type strain clamp of claim 1, wherein: the joint of the upper part and the lower part of the dust cover (3) is arranged to be connected by an oblique angle.
9. The boltless wedge type strain clamp of claim 1, wherein: the length of the wedge groove (13) is less than that of the wire clamp body (1).
10. The boltless wedge type strain clamp of claim 1, wherein: the strain clamp does not contain a bolt fixing structure in all structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020285369.2U CN211556796U (en) | 2020-03-10 | 2020-03-10 | Bolt-free wedge-shaped strain clamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020285369.2U CN211556796U (en) | 2020-03-10 | 2020-03-10 | Bolt-free wedge-shaped strain clamp |
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| CN211556796U true CN211556796U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020285369.2U Active CN211556796U (en) | 2020-03-10 | 2020-03-10 | Bolt-free wedge-shaped strain clamp |
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| CN (1) | CN211556796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181109A (en) * | 2020-03-10 | 2020-05-19 | 云南电网有限责任公司 | Bolt-free wedge-shaped strain clamp |
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2020
- 2020-03-10 CN CN202020285369.2U patent/CN211556796U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181109A (en) * | 2020-03-10 | 2020-05-19 | 云南电网有限责任公司 | Bolt-free wedge-shaped strain clamp |
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Effective date of registration: 20210106 Address after: No.73 Tuodong Road, Guandu District, Kunming, Yunnan 650000 Patentee after: YUNNAN POWER GRID Co.,Ltd. Address before: 650011 Tuo Dong Road, Kunming, Kunming, Yunnan Patentee before: YUNNAN POWER GRID Co.,Ltd. Patentee before: China Energy Construction Group Yunnan Electric Power Design Institute Co.,Ltd. |