Windproof device for distribution network overhead line equipment wire clamp

Abstract

The invention relates to the technical field of overhead line equipment wire clamp protection devices, in particular to a distribution network overhead line equipment wire clamp windproof device which comprises an elastic tail sleeve, a tightening sleeve, a clamping sleeve, a stabilizing lug and a stabilizing arm. And the clamping sleeve sleeves the outer side of the small-opening end of the elastic tail sleeve and clamps the elastic tail sleeve and the tightening sleeve. The wire clamp is reasonable and compact in structure and convenient to use, the elastic tail sleeve, the tightening sleeve, the clamping sleeve and the wire clamp are fixed through the stabilizing lugs, shaking caused by relative displacement is avoided, the stabilizing arms and the wire clamp are fixed, the stabilizing lugs and the stabilizing arms fix the wire clamp in three positions, the three positions form a triangular structure, the fixing strength of the wire clamp is improved, and the service life of the wire clamp is prolonged. The elastic tail sleeve can convert vibration energy into elastic potential energy and friction heat energy when the lead swings, the vibration amplitude and energy are reduced, and the risk that the lead and the wire clamp are loosened and broken is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of overhead line equipment wire clamp protection devices, in particular to a windproof device for a distribution network overhead line equipment wire clamp. Background Art

[0002] Existing, mature field-proven equipment cable clamps are mostly constructed from sheet metal aluminum, with ductile iron bolts and a press-fit plate at the rear end connecting the conductor to the equipment. These traditional cable clamps function well in areas with limited wind and no vibration, but their performance and reliability are affected in areas with strong winds and high-frequency vibration. For example, in 2023, Urumqi experienced nearly 1,000 faults across all calibers, with over 60 cases of broken leads accounting for nearly 6.5%. Urumqi County and Dabancheng Districts experienced a particularly high annual share of nearly 13%. In 2024, despite a significant decrease in high winds, Urumqi still experienced nearly 1,200 faults, with over 70 cases of broken leads and equipment cable clamps accounting for nearly 5.8%. Urumqi County and Dabancheng Districts experienced a similar annual share of nearly 8.8%. Since trolleys were unavailable in most areas, power outages were necessary for repairs. This not only significantly impacted the quality of power supply and the safe and stable operation of the power grid, but also significantly increased the workload and costs of operations and maintenance personnel. In windy and vibrating environments, the wire clamp has the following problems: 1. The vibration of the guide wire body caused by environmental factors such as wind will penetrate the entire connection structure, which can easily cause the vibration and loosening of the bolts and nuts fixing the pressure plate, and then cause the guide wire head to slip from under the fixed pressure plate, and the bolt connection structure fixing the equipment wire clamp to the equipment to loosen, etc.; 2. The vibration swing amplitude of the guide wire body swings arbitrarily with factors such as external strong winds and vibrations transmitted by other line main equipment, which can easily cause the exposed root of the guide wire and the middle section of the equipment wire clamp to be subjected to excessive reciprocating stress due to multiple-frequency swings, resulting in mechanical fatigue damage and even fracture.

[0003] The invention patent with publication number CN111509480B discloses an anti-breaking device for an equipment wire clamp, comprising: an equipment wire clamp including an outlet terminal, a clamping piece connected to the outlet terminal, and a bolt, wherein the bolt fastens the clamping piece to the outlet terminal; an anti-breaking unit including a box body sleeved on the equipment wire clamp, a first spring and a second spring connected to the bolt, a spring seat provided between the first spring and the second spring, the spring seat being located in the box body, the first spring and the second spring having opposite winding directions and the same number of turns; a cable including an insulating layer and a wire core, wherein the first spring and the second spring are both sleeved outside the insulating layer. Compared with the existing mature equipment wire clamp, the additional anti-breaking design of the wire clamp suppresses the vibration and swing of the guide wire end to a certain extent. The additional device of the wire clamp is not applicable to guide wires of different wire diameters, and its structure is complex and delicate, with many parts, making it difficult to manufacture, process and install, and its overall strength is insufficient. This significantly weakens the crimping strength of the guide wire ends in the equipment clamp, significantly increasing the force transmitted directly from wire vibration to the clamp bolt, making it easier to loosen. The negative effect of the wire swing force being directly transmitted to the middle section of the equipment clamp (between the wire clamp securing the wire and the clamp securing the device), and the addition of perforations to this middle section actually reduces the strength of the clamp, resulting in insufficient reliability. Summary of the Invention

[0004] The present invention provides a windproof device for wire clamps of distribution network overhead line equipment, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that existing leads and wire clamps are easily loosened and broken in strong winds and high-frequency vibration environments.

[0005] The technical solution of the present invention is achieved through the following measures: a windproof device for a wire clamp of a distribution network overhead line equipment, comprising an elastic tail sleeve, a tightening sleeve, a clamping sleeve, a stabilizing ear, and a stabilizing arm. The elastic tail sleeve can be elastically deformed, the elastic tail sleeve is trumpet-shaped, the small end of the elastic tail sleeve is sleeved on the outside of the tightening sleeve, the clamping sleeve is sleeved on the outside of the small end of the elastic tail sleeve and clamps the elastic tail sleeve and the tightening sleeve, two stabilizing ears are symmetrically installed on the outside of the clamping sleeve, the stabilizing ears are provided with mounting holes, a wire clamp is installed between the two stabilizing ears, a stabilizing arm is installed on the upper side of the clamping sleeve, and the other end of the stabilizing arm can be fixedly connected to the wire clamp.

[0006] The following are further optimizations and / or improvements to the above technical solutions: Preferably, the elastic tail sleeve is composed of three stainless steel arc-shaped pieces, and the adjacent parts of the stainless steel arc-shaped pieces near the large end are provided with grooves, and the stainless steel arc-shaped pieces are of a special-shaped spring structure.

[0007] Preferably, a cutting groove is provided on one side of the large end of the stainless steel arc-shaped sheet.

[0008] Preferably, it also includes an open annular stainless steel limit spring, and a first flange is provided on the outer side of the middle part of the three-petal stainless steel arc piece. The open annular stainless steel limit spring is mounted on the outer side of the three-petal stainless steel arc piece, and the open annular stainless steel limit spring is located on the side of the first flange close to the large mouth end.

[0009] Preferably, the stabilizing arm includes an end stabilizing arm, a middle stabilizing arm and a front end stabilizing arm, a protrusion is provided on the upper side of the clamping sleeve, the end stabilizing arm is fixed to the protrusion by a bolt, a first long slot is provided at the front end of the end stabilizing arm, a plurality of fixing holes are provided on the middle stabilizing arm, the middle stabilizing arm is fixed to the first long slot position of the end stabilizing arm, the other end of the middle stabilizing arm is fixed to the front end stabilizing arm, the front end stabilizing arm is Z-shaped, a second long slot is provided at the rear end of the front end stabilizing arm, a connecting hole is provided at the front of the front end stabilizing arm, and the front end stabilizing arm is installed to the front of the wire clamp through the connecting hole.

[0010] Preferably, an outer ring platform is provided on the outside of the middle part of the tightening sleeve, and a second flange with a concave inner side and a convex outer side is provided near the small opening of the elastic tail sleeve. The inner side of the second flange matches the outer ring platform, and the outer side of the second flange matches the inner side of the clamping sleeve.

[0011] Preferably, the clamping sleeve includes an upper clamping sleeve and a lower clamping sleeve that are installed together by buckling, and one end of the stabilizing ear is fixed to the upper clamping sleeve and the lower clamping sleeve by bolts. The inner sides of the two stabilizing ears protrude inward, and the protruding parts of the inner sides of the two stabilizing ears can center the wire clamp. The stabilizing ear is a stainless steel sheet-shaped special-shaped spring structure; or / and, spring washers and anti-loosening nuts are provided at the bolt fixing locations.

[0012] The present invention has a reasonable and compact structure and is easy to use. It fixes the elastic tail sleeve, tightening sleeve, clamping sleeve and wire clamp through the stabilizing ear, thereby avoiding shaking caused by relative displacement. The stabilizing arm is fixed to the wire clamp, and the stabilizing ear and the stabilizing arm form three positions for fixing the wire clamp. The three positions form a triangular structure, which improves the fixing strength of the wire clamp. The elastic tail sleeve can convert vibration energy into elastic potential energy and frictional heat energy when the lead swings, reduce the vibration amplitude and energy, and effectively reduce the risk of the lead and wire clamp loosening and breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0014] Attachment Figure 2 This is a schematic diagram of the three-dimensional structure after the wire clamp is installed in the present invention.

[0015] Attachment Figure 3 For attachment Figure 2 Exploded diagram.

[0016] The codes in the accompanying drawings are: 1 is an elastic tail sleeve, 2 is a tightening sleeve, 3 is a stabilizing ear, 4 is a cut groove, 5 is a cut groove, 6 is an open ring stainless steel limit spring, 7 is an end stabilizing arm, 8 is a middle stabilizing arm, 9 is a front end stabilizing arm, 10 is a bump, 11 is a first long groove, 12 is a fixing hole, 13 is a second long groove, 14 is a connecting hole, 15 is an outer ring platform, 16 is a first flange, 17 is a second flange, 18 is an upper clamping sleeve, 19 is a lower clamping sleeve, 20 is a spring washer, 21 is a lock nut, and 22 is a wire clamp. DETAILED DESCRIPTION

[0017] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0018] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 For example, the positional relationships of front, back, up, down, left, and right are determined according to the layout directions of the drawings in the specification.

[0019] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: Example 1: As shown in the attached Figure 1-3 As shown, the wire clamp windproof device for distribution network overhead line equipment includes an elastic tail sleeve 1, a tightening sleeve 2, a clamping sleeve, a stabilizing ear 3, and a stabilizing arm. The elastic tail sleeve 1 can be elastically deformed, and the elastic tail sleeve 1 is trumpet-shaped. The small end of the elastic tail sleeve 1 is sleeved on the outside of the tightening sleeve 2, and the clamping sleeve is sleeved on the outside of the small end of the elastic tail sleeve 1 and clamps the elastic tail sleeve 1 and the tightening sleeve 2. Two stabilizing ears 3 are symmetrically installed on the outside of the clamping sleeve, and mounting holes are provided on the stabilizing ears 3. A wire clamp 22 is installed between the two stabilizing ears 3, and a stabilizing arm is installed on the upper side of the clamping sleeve. The other end of the stabilizing arm can be fixedly connected to the wire clamp 22.

[0020] According to requirements, the main components such as the elastic tail sleeve 1, stabilizing ears 3 and stabilizing arms are made of stainless steel. Stainless steel has excellent anti-oxidation properties and can effectively resist the erosion of oxygen, moisture and other corrosive substances in the air, thereby extending the service life of the device.

[0021] When in use, place the wire clamp 22 between the two stabilizing ears 3, pass the lead through the elastic tail sleeve 1 and put it into the wire clamping groove of the wire clamp 22. After the upper and lower pressure plates of the wire clamp 22 press the lead, align the mounting holes on the stabilizing ears 3 with the mounting holes on the pressure plates, and fix them with bolts, spring washers 20 and anti-loosening nuts 21. The front end of the wire clamp 22 and the stabilizing arm are fixed with bolts, spring washers 20 and anti-loosening nuts 21, forming three positions for fixing the wire clamp 22. The three positions form a triangular stable structure, which limits the swing of the wire clamp 22, reduces the vibration and tension on the bolts, reduces the risk of bolt loosening, and improves the fixing strength of the equipment wire clamp 22. The elastic tail sleeve 1 limits the swing of the lead wire near the lead head. The trumpet-shaped structure of the elastic tail sleeve 1 effectively limits the swing range of the lead wire, avoids collision and friction between the lead wire and other components, and prevents stress concentration due to excessive swing amplitude. When the lead wire vibrates and swings, the elastic tail sleeve 1 can produce elastic deformation, converting the vibration energy into elastic potential energy and molecular friction heat energy, thereby reducing the amplitude and frequency of the vibration, thereby effectively reducing the risk of the lead wire and the wire clamp 22 loosening and breaking.

[0022] The above-mentioned wire clamp windproof device for overhead line equipment can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached Figure 1-3 As shown, the elastic tail sleeve 1 is constructed from three curved stainless steel pieces. Each piece has a slot 4 formed near the wide end of each piece. The curved stainless steel piece has a special-shaped spring structure. This special-shaped spring structure not only limits the guide wire's swing position near the lead head, preventing stress concentration damage, but also acts as an elastic energy absorber. Through its own elastic deformation, it converts vibration energy into elastic potential energy and intermolecular frictional heat energy, thereby reducing the impact of vibration on the guide wire and the device clamp 22 and lowering the swing frequency.

[0023] Example 3: As shown in the attached Figure 1-3 As shown, one side of the large end of the stainless steel arc-shaped sheet is provided with a cutting groove 5. By arranging the cutting groove 5, elasticity is increased, so that it has greater deformation capacity and can better play the elastic energy absorption role.

[0024] Example 4: As shown in the attached Figure 1-3 As shown, the spring also includes an open annular stainless steel limit spring 6. Each of the three-lobed stainless steel curved pieces is provided with a first flange 16 on the outside of the middle portion. The open annular stainless steel limit spring 6 is mounted on the outside of the three-lobed stainless steel curved piece, and is located on the side of the first flange 16 near the wide end. This limits the swing of the elastic tail sleeve 1, preventing damage to the three-lobed stainless steel curved piece from excessive swinging, and also provides a certain elastic energy absorption function.

[0025] Example 5: As shown in the attached Figure 1-3As shown, the stabilizing arm includes an end stabilizing arm 7, a middle stabilizing arm 8 and a front end stabilizing arm 9. A protrusion 10 is provided on the upper side of the clamping sleeve. The end stabilizing arm 7 is fixedly installed with the protrusion 10 by bolts. A first long groove 11 is provided at the front end of the end stabilizing arm 7. A plurality of fixing holes 12 are provided on the middle stabilizing arm 8. The middle stabilizing arm 8 is fixedly installed with the first long groove 11 of the end stabilizing arm 7. The other end of the middle stabilizing arm 8 is fixedly installed with the front end stabilizing arm 9. The front end stabilizing arm 9 is Z-shaped. A second long groove 13 is provided at the rear end of the front end stabilizing arm 9. A connecting hole 14 is provided at the front of the front end stabilizing arm 9. The front end stabilizing arm 9 is installed with the front of the wire clamp 22 through the connecting hole 14.

[0026] The end stabilizing arm 7, the middle stabilizing arm 8, and the front stabilizing arm 9 are all shot-peened, resulting in a uniform friction structure, a high friction coefficient, and high fatigue and corrosion resistance. The distance between the end stabilizing arm 7 and the front stabilizing arm 9 is adjusted by the first and second long slots 11 and 13, enabling application to wire clamps 22 with different mounting hole spacings. By providing a middle stabilizing arm 8 with a plurality of fixing holes 12 to connect the end stabilizing arm 7 and the front stabilizing arm 9, the end stabilizing arm 7 and the front stabilizing arm 9 can be rotated relative to each other. This allows application in situations where the two ends of the wire clamp 22 (the axis of the wire clamping groove and the axis of the front mounting hole) are not aligned and are angled in the XY direction. For some wire clamps 22 with angles in the XZ direction, the middle stabilizing arm 8 can be configured as a V-shaped structure in the XZ direction, thereby securing the front stabilizing arm 9 to the front mounting hole of the wire clamp 22. Therefore, the three-section stabilizing arm configuration offers greater flexibility and is applicable to different wire clamps 22. There is a type of wire clamp 22 that can hold leads within a certain diameter range. By wrapping the lead insulation with insulating tape, it is stably contacted with the inner side of the tightening sleeve 2, reducing the shaking of this part relative to the wire clamp 2, and can adapt to the clamping of leads with different outer diameters.

[0027] Example 6: As shown in the attached Figure 1-3 As shown, an outer ring 15 is provided on the outside of the center of the tightening sleeve 2, and a second flange 17 with a concave interior and a convex exterior is provided near the opening of the elastic tail sleeve 1. The inner side of the second flange 17 mates with the outer ring 15, and the outer side of the second flange 17 mates with the inner side of the clamping sleeve. The outer ring 15 and second flange 17 secure the elastic tail sleeve 1 to the tightening sleeve 2 and the clamping sleeve, preventing them from moving or disengaging, and providing better stability.

[0028] Example 7: As shown in the attached Figure 1-3As shown, the clamping sleeve includes an upper clamping sleeve 18 and a lower clamping sleeve 19 that are mounted together in a buckled manner. One end of the stabilizing ear 3 is fixed to the upper clamping sleeve 18 and the lower clamping sleeve 19 by bolts. The inner sides of the two stabilizing ears 3 protrude inward, and the protruding portions of the inner sides of the two stabilizing ears 3 can center the wire clamp 22. The stabilizing ears 3 are stainless steel leaf-shaped special-shaped spring structures; or / and, spring washers 20 and locknuts 21 are provided at the bolt fixing points. The inner sides of the two stabilizing ears 3 protrude inward to fit over the two sides of the wire clamp 22, centering the wire clamp 22 and keeping the lead axis aligned with the axis of the lead head within the wire clamp 22, preventing the lead and lead head from bending and causing stress. The double anti-loosening structure of spring washers 20 and locknuts 21 is used to prevent vibration and loosening.

[0029] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A windproof device for overhead line equipment of distribution network, characterized in that It includes an elastic tail sleeve, a tightening sleeve, a clamping sleeve, a stabilizing ear, and a stabilizing arm. The elastic tail sleeve can be elastically deformed and is trumpet-shaped. The small end of the elastic tail sleeve is sleeved on the outside of the tightening sleeve. The clamping sleeve is sleeved on the outside of the small end of the elastic tail sleeve and clamps the elastic tail sleeve and the tightening sleeve. Two stabilizing ears are symmetrically installed on the outside of the clamping sleeve, and mounting holes are provided on the stabilizing ears. A wire clamp is installed between the two stabilizing ears. A stabilizing arm is installed on the upper side of the clamping sleeve, and the other end of the stabilizing arm can be fixedly connected to the wire clamp.

2. The wire clamp windproof device for overhead line equipment of distribution network according to claim 1, characterized in that The elastic tail sleeve is composed of three stainless steel arc-shaped pieces. The adjacent parts of the stainless steel arc-shaped pieces are provided with grooves near the large-mouth end. The stainless steel arc-shaped pieces are of a special-shaped spring structure.

3. The wire clamp windproof device for overhead line equipment of distribution network according to claim 2, characterized in that One side of the large mouth end of the stainless steel arc-shaped piece is provided with a cutting groove.

4. The wire clamp windproof device for overhead line equipment of distribution network according to claim 2 or 3, characterized in that It also includes an open ring stainless steel limit spring. A first flange is provided on the outer side of the middle part of the three-petal stainless steel arc piece. The open ring stainless steel limit spring is mounted on the outer side of the three-petal stainless steel arc piece. The open ring stainless steel limit spring is located on the side of the first flange close to the large mouth end.

5. The wire clamp windproof device for overhead line equipment of distribution network according to claim 1, 2 or 3, characterized in that The stabilizing arm includes an end stabilizing arm, a middle stabilizing arm and a front end stabilizing arm. A protrusion is provided on the upper side of the clamping sleeve. The end stabilizing arm is fixed to the protrusion by a bolt. A first long slot is provided at the front end of the end stabilizing arm. A plurality of fixing holes are provided on the middle stabilizing arm. The middle stabilizing arm is fixed to the first long slot position of the end stabilizing arm. The other end of the middle stabilizing arm is fixed to the front end stabilizing arm. The front end stabilizing arm is Z-shaped. A second long slot is provided at the rear end of the front end stabilizing arm. A connecting hole is provided at the front of the front end stabilizing arm. The front end stabilizing arm is installed to the front of the wire clamp through the connecting hole.

6. The wire clamp windproof device for overhead line equipment of distribution network according to claim 4, characterized in that The stabilizing arm includes an end stabilizing arm, a middle stabilizing arm and a front end stabilizing arm. A protrusion is provided on the upper side of the clamping sleeve. The end stabilizing arm is fixed to the protrusion by a bolt. A first long slot is provided at the front end of the end stabilizing arm. A plurality of fixing holes are provided on the middle stabilizing arm. The middle stabilizing arm is fixed to the first long slot position of the end stabilizing arm. The other end of the middle stabilizing arm is fixed to the front end stabilizing arm. The front end stabilizing arm is Z-shaped. A second long slot is provided at the rear end of the front end stabilizing arm. A connecting hole is provided at the front of the front end stabilizing arm. The front end stabilizing arm is installed to the front of the wire clamp through the connecting hole.

7. The wire clamp windproof device for overhead line equipment of distribution network according to claim 1, 2, 3 or 6, characterized in that An outer ring platform is provided on the outside of the middle part of the tightening sleeve, and a second flange with a concave inner side and a convex outer side is provided near the small opening of the elastic tail sleeve. The inner side of the second flange matches the outer ring platform, and the outer side of the second flange matches the inner side of the clamping sleeve.

8. The wire clamp windproof device for overhead line equipment of distribution network according to claim 4, characterized in that An outer ring platform is provided on the outside of the middle part of the tightening sleeve, and a second flange with a concave inner side and a convex outer side is provided near the small opening of the elastic tail sleeve. The inner side of the second flange matches the outer ring platform, and the outer side of the second flange matches the inner side of the clamping sleeve.

9. The wire clamp windproof device for overhead line equipment of distribution network according to claim 5, characterized in that An outer ring platform is provided on the outside of the middle part of the tightening sleeve, and a second flange with a concave inner side and a convex outer side is provided near the small opening of the elastic tail sleeve. The inner side of the second flange matches the outer ring platform, and the outer side of the second flange matches the inner side of the clamping sleeve.

10. The wire clamp windproof device for overhead line equipment of a distribution network according to claim 1, 2, 3, 6, 8 or 9, characterized in that The clamping sleeve includes an upper clamping sleeve and a lower clamping sleeve that are installed together with a buckle. One end of the stabilizing ear is fixed to the upper clamping sleeve and the lower clamping sleeve by bolts. The inner sides of the two stabilizing ears protrude inward. The protruding parts of the inner sides of the two stabilizing ears can center the wire clamp. The stabilizing ear is a stainless steel sheet-shaped special-shaped spring structure; or / and, spring washers and anti-loosening nuts are provided at the bolt fixing locations.

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