A corrugated anti-loosening crimp-type tension clamp and anti-loosening method

Abstract

A corrugated, anti-loosening crimp-type tension clamp and its anti-loosening method are disclosed, comprising a drain plate, a jumper rod, a first nut, and a first bolt. The drain plate has a concave structure with concave corrugations on its inner wall; the upper and lower surfaces of the jumper rod's end are convex corrugated. After the jumper rod is inserted into the drain plate, the concave and convex corrugations interlock, and the jumper rod and drain plate are locked together by the first nut and the first bolt. This invention provides an anti-loosening crimp-type tension clamp with a corrugated structure, which can prevent the drain clamp from loosening.

Description

Technical Field

[0001] This invention relates to tension clamps, and in particular to a corrugated anti-loosening crimp-type tension clamp and anti-loosening method, which is applicable to anti-loosening connection hardware for dynamic capacity expansion of overhead transmission lines. Background Technology

[0002] Crimped tension clamps are widely used power fittings in overhead transmission lines. They are used to fix conductors and bear their tension, suspending the conductors to the tension string assemblies of tension towers to ensure the safe and stable operation of the line. However, in actual operation, overhead transmission lines often experience conductor galloping and insulator string misalignment, which can cause the current-carrying plates of the crimped tension clamps to loosen. When the line is dynamically increased in capacity or the current carried is large, this loosening is prone to overheating and other problems due to high contact resistance, which in turn poses a serious threat to the safe and stable operation of the line.

[0003] Current research on anti-loosening tension clamps for overhead transmission lines includes:

[0004] (1) Invention Patent "Anti-loosening Tension Clamp" (Application No.: 201910843700.X): This patent includes a clamp body, a draining fluid, and an anti-loosening tightening device. The draining fluid includes a fixed draining rod, a jumper draining rod, and a connecting nut on the jumper draining rod. The lower end face of the fixed draining rod is provided with a tapered insertion hole. The jumper draining rod includes a tapered insertion rod inserted into the tapered insertion hole. The anti-loosening tightening device includes a radial through hole on the fixed draining rod, an annular groove on the outer side of the tapered insertion rod, a sliding main rod slidably disposed in the radial through hole, a guide hole on the inner end face of the sliding main rod, a sliding top rod slidably disposed in the guide hole, and a pressing mechanism. Obviously, the structure of this anti-loosening tension clamp is relatively complex and is not suitable for power maintenance personnel to perform high-altitude installation work on the line site.

[0005] (2) Invention Patent "An Anti-Loosening Tension Clamp" (Application No.: 202311010629.X): This patent consists of a dual locking and anti-loosening mechanism composed of a bidirectional control adjustment locking anti-loosening component and a reverse clamping flexible buffer component. Through the synergy between the two, the locking and anti-loosening effect of the conductor is effectively achieved. However, this patent is aimed at bolt-type tension clamps, not crimp-type tension clamps, and the structure of its bidirectional operation adjustment control mechanism, linkage offset reverse clamping mechanism and rotation mechanism is relatively complex, and the processing difficulty is also relatively high.

[0006] (3) Invention Patent "An Anti-loosening Tension Clamp" (Application No.: 202410755447.3): This patent includes a clamp shell, on which are provided concave U-shaped clamps and convex U-shaped clamps. Multiple bottom holes for clamping plates are provided at the bottom of the clamp shell. Both the convex and concave U-shaped clamps consist of U-bolts, pressure blocks, and pads. The pad rests on the bottom of the clamping plates. The U-bolts and pads are connected by nuts. The upper and lower ends of the pressure blocks rest on the U-bolts and the wire, respectively. Vertical holes are provided on the pads at positions corresponding to the bottom holes of the clamping plates. A clamping element is provided inside the vertical holes. A cap is provided at the top of the clamping element to lift the wire upwards. The clamping element includes a bolt shell, inside which is an inner column that slides vertically. The top of the inner column is connected to the cap, and a self-locking structure is provided on the side of the inner column. The self-locking structure of this patent is difficult to manufacture and is hard to apply in practice. Summary of the Invention

[0007] The technical problem to be solved by this invention is to provide a corrugated anti-loosening crimp-type tension clamp and an anti-loosening method. The drain plate is designed with a concave structure, and both inner walls of the double plates have concave corrugations. The surface of the jumper drain rod is designed with convex corrugations. After the drain rod is inserted into the drain plate, the concave and convex corrugations interlock to achieve the dual purpose of increasing the contact area between the drain plate and the drain rod and preventing the drain clamp from loosening. Furthermore, the connecting nut between the drain plate and the drain rod is a double-nut type, achieving a second layer of anti-loosening effect.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0009] A corrugated anti-loosening crimp-type tension clamp includes a drain plate, a jumper drain rod, a first nut, and a first bolt. The drain plate has a concave structure and its inner wall has concave corrugations. The upper and lower surfaces of the jumper drain rod end are convex corrugations. After the jumper drain rod is inserted into the drain plate, the concave and convex corrugations interlock, and the jumper drain rod and drain plate are locked together by the first nut and the first bolt.

[0010] The first nut is a double nut.

[0011] The ends of the jumper wire drain rod and the drain plate are both plate-shaped, and the concave and convex corrugations are both wavy.

[0012] The drainage plate has a double-plate structure.

[0013] The first bolt has a sleeve fixed to its end. The sleeve has through holes on the left and right sides of its inner sidewall. The screw passes through the through holes and is threaded to the second nut. The other end of the screw is fixed to the connecting plate, which is mounted on the jumper drain rod.

[0014] The connecting plate is L-shaped, with one side of the connecting plate abutting against the end of the drainage plate.

[0015] A limiting sleeve is fixed at the through hole on one side, and a spring is fixed at the through hole on the other side. The spring is connected to the frustum. The screw passes through the limiting sleeve, the frustum, and the spring. The frustum is pressed against the limiting sleeve by the spring and holds the screw tightly.

[0016] The truncated cone is a rubber block, and the side wall of the rubber block has a slit.

[0017] The limiting sleeve has an insertion hole with a small diameter at one end and a large diameter at the other end.

[0018] A method for preventing loosening of a corrugated, anti-loosening crimp-type tension clamp includes the following steps:

[0019] Step 1: During installation, insert the jumper drain rod into the drain plate until the convex corrugations of the jumper drain rod and the concave corrugations of the drain plate are interlocked.

[0020] Step 2: Insert the first bolt into the two sets of bolt holes on the same side, with one set of the first bolts facing upwards and the other facing downwards; since the sleeve size is smaller than the diameter of the first bolt, the first nut can be screwed in for initial tightening;

[0021] Step 3: Unscrew the cap, press the truncated cone to the right and compress the spring; then insert the screw horizontally into the sleeve through the through hole on the left, the screw passes through the truncated cone and the spring and extends out of the through hole on the right and is threaded into the second nut;

[0022] Step 4: Release the truncated cone. Under the action of the spring, the truncated cone is pushed into the limiting sleeve and locked. At the same time, the truncated cone also holds the screw, restricting the screw from moving to the left.

[0023] This invention provides a corrugated anti-loosening crimp-type tension clamp and an anti-loosening method, which has the following technical effects:

[0024] 1) The double-board-single-board structure can shunt current and reduce resistance and heat generation; the double-board has concave corrugations and the single-board has convex corrugations. The corrugations work together to achieve the first layer of anti-loosening effect for the current-draining plate and jumper rod; the use of double nuts for fixing achieves the second layer of anti-loosening effect.

[0025] 2) By arranging a secondary locking and anti-loosening mechanism such as a sleeve and screw on the screw rod, this secondary locking and anti-loosening mechanism can first restrict the rotation and vertical movement of the first bolt, preventing the first bolt from loosening or falling out; secondly, after the two first nuts rotate, the screw rod acts as an upper and lower limit, preventing the first nut from unscrewing the first bolt; thirdly, when the jumper cable drain rod is pulled outward relative to the drain plate, the connecting plate on the jumper cable drain rod is connected to the first bolt through the secondary locking and anti-loosening mechanism, which can further play an anti-loosening role, preventing the jumper cable drain rod from separating from the drain plate. That is, the secondary locking and anti-loosening mechanism can not only lock and limit the first bolt and the first nut; at the same time, through the connecting action of the connecting plate, the jumper cable drain rod, the connecting plate and the first bolt form a whole, so that even if the first nut is loose, it can still achieve limiting and locking. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Figure 1 This is a schematic diagram of the structure of the present invention (first type).

[0028] Figure 2 This is a cross-sectional view of the present invention (second type).

[0029] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0030] Figure 4 This is a schematic diagram of the structure of the frustum of the present invention.

[0031] In the figure: 1. Drainage plate, 1.1. Concave corrugation, 2. Jumper drain rod, 2.1. Convex corrugation, 3. First nut, 4. First bolt, 5. Sleeve, 6. Cap, 7. Through hole, 8. Limiting sleeve, 9. Spring, 10. Screw, 11. Second nut, 12. Frustum, 13. Connecting plate. Detailed Implementation

[0032] Example 1

[0033] like Figure 1 As shown, a corrugated anti-loosening crimp-type tension clamp includes a drain plate 1, a jumper drain rod 2, a first nut 3, and a first bolt 4. The drain plate 1 has a concave structure and the inner wall has concave corrugations 1.1. The upper and lower surfaces of the jumper drain rod 2 are convex corrugations 2.1. After the jumper drain rod 2 is inserted into the drain plate 1, the concave corrugations 1.1 and the convex corrugations 2.1 are interlocked.

[0034] The first nut 3 uses a double nut.

[0035] Before installation, four bolt holes should be pre-drilled on the diversion plate 1 and the jumper rod 2. After the two are assembled, the bolt holes will be aligned so that the bolts can pass through the bolt holes and be locked by the first nut 3.

[0036] During installation, insert the jumper drain rod 2 into the drain plate 1 until the convex corrugations 2.1 of the jumper drain rod 2 and the concave corrugations 1.1 of the drain plate 1 are interlocked. Then, insert the first bolt 4 into the four bolt holes and fix it with double nuts to achieve a double anti-loosening effect.

[0037] Example 2

[0038] like Figure 2-4 As shown, unlike Embodiment 1 above, a large-diameter first bolt 4 is used. A sleeve 5 is welded to the end of the first bolt 4 (located on one side of the first nut 3). The upper end of the sleeve 5 is open and threaded with a cap 6. Through holes 7 are opened on the left and right sides of the sleeve 5, and a limiting sleeve 8 is fixed on the left side of the inner wall of the through hole 7. The limiting sleeve 8 has an insertion hole with a smaller diameter at one end and a larger diameter at the other end. A spring 9 is fixed to the other end of the sleeve 5, which is directly opposite the limiting sleeve 8. A frustum 12 is fixed to the end of the spring 9. The screw 10 passes through the through hole 7 on the left side, the limiting sleeve 8, the frustum 12, the spring 9, and the through hole 7 on one side of the spring 9, and is threaded to the second nut 11. The frustum 12 is locked in place by the spring 9 in the insertion hole of the limiting sleeve 8. The other end of the screw 10 is fixedly connected to the connecting plate 13, which is detachably mounted on the jumper drain rod 2 by the second bolt.

[0039] Preferably, there are four sets of first bolts 4. The ends of the two sets of first bolts 4 on the same side (located on the side of the first nut 3) are staggered vertically, which facilitates installation. The corresponding two sets of connecting plates 13 are fixed with the same set of second bolts, which simplifies the installation.

[0040] Preferably, the connecting plate 13 is L-shaped, with one side of the connecting plate 13 abutting against the end of the diversion plate 1. This allows for the positioning of the connecting plate 13.

[0041] Preferably, the frustum 12 is a rubber block with slits on its sidewalls. It can grip the screw 10 while being pushed into the limiting sleeve 8. Since the limiting sleeve 8 restricts the frustum 12 from moving to the left, and the frustum 12 grips the screw 10, the frustum 12 further restricts the screw 10 from moving to the left. This prevents the screw 10 from moving out of the sleeve 5 even if the bolts at the connecting plate 13 or the second nut 11 become loose.

[0042] During installation, insert the jumper drain rod 2 into the drain plate 1 until the convex corrugations 2.1 of the jumper drain rod 2 and the concave corrugations 1.1 of the drain plate 1 are interlocked.

[0043] Insert the first bolt 4 into the two sets of bolt holes on the same side, with one set of the first bolt 4 facing upwards and the other downwards. Since the sleeve 5 is smaller than the diameter of the first bolt 4, it can be initially tightened after screwing in the first nut 3.

[0044] Unscrew cap 6, press frustum 12 to the right and compress spring 9; then insert screw 10 horizontally into sleeve 5 through through hole 7 on the left, screw 10 passes through frustum 12 and spring 9 and extends out through through hole 7 on the right before being threaded into second nut 11. Release frustum 12, and under the action of spring 9 (appropriate spring 9 needs to be selected so that the spring force of spring 9 meets the requirements), frustum 12 is pushed into limit sleeve 8 and locked. At the same time, frustum 12 also holds screw 10 tightly, restricting screw 10 from moving to the left.

Claims

1. A corrugated, anti-loosening crimp-type tension clamp, characterized in that: Includes a drainage plate (1), a jumper drain rod (2), a first nut (3), and a first bolt (4). The drainage plate (1) has a concave structure and the inner wall has concave corrugations (1.1). The upper and lower surfaces of the jumper drain rod (2) end are convex corrugations (2.1). After the jumper drain rod (2) is inserted into the drainage plate (1), the concave corrugations (1.1) and the convex corrugations (2.1) fit together. The jumper drain rod (2) and the drainage plate (1) are locked together by the first nut (3) and the first bolt (4). The first nut (3) is a double nut; The ends of the jumper drain rod (2) and the drain plate (1) are both plate-shaped, and the concave corrugations (1.1) and convex corrugations (2.1) are both wave-shaped; The drainage plate (1) has a double-plate structure; The first bolt (4) has a sleeve (5) fixed at its end. The inner side wall of the sleeve (5) has through holes (7) facing each other on the left and right. The screw (10) passes through the through holes (7) on the left and right and is threaded to the second nut (11). The other end of the screw (10) is fixed on the connecting plate (13). The connecting plate (13) is installed on the jumper drain rod (2). A limiting sleeve (8) is fixed at the through hole (7) on one side, and a spring (9) is fixed at the through hole (7) on the other side. The spring (9) is connected to the frustum (12). The screw (10) passes through the limiting sleeve (8), the frustum (12), and the spring (9). The frustum (12) is pressed against the limiting sleeve (8) by the spring (9) and holds the screw (10).

2. The anti-loosening crimp-type tension clamp with corrugated structure according to claim 1, characterized in that: The connecting plate (13) is L-shaped, and one side of the connecting plate (13) abuts against the end of the diversion plate (1).

3. The anti-loosening crimp-type tension clamp with corrugated structure according to claim 1, characterized in that: The truncated cone (12) is a rubber block, and the side wall of the rubber block has a slit.

4. The anti-loosening crimp-type tension clamp with corrugated structure according to claim 1, characterized in that: The limiting sleeve (8) has an insertion hole with a small diameter at one end and a large diameter at the other end.

5. The method for preventing loosening of a corrugated anti-loosening crimp-type tension clamp according to claim 4, characterized in that: Includes the following steps: Step 1: During installation, insert the jumper drain rod (2) into the drain plate (1) until the convex corrugations (2.1) of the jumper drain rod (2) and the concave corrugations (1.1) of the drain plate (1) are interlocked in place; Step 2: Insert the first bolt (4) into the two sets of bolt holes on the same side, with one set of the first bolts (4) facing upwards and the other set facing downwards; since the sleeve (5) is smaller than the diameter of the first bolt (4), the first nut (3) can be screwed in for initial tightening; Step 3: Unscrew the cap (6), press the truncated cone (12) to the right and compress the spring (9); then insert the screw (10) horizontally into the sleeve (5) through the through hole (7) on the left side. The screw (10) passes through the truncated cone (12), the spring (9) and extends out of the through hole (7) on the right side and is threaded into the second nut (11). Step 4: Release the frustum (12). Under the action of the spring (9), the frustum (12) is pushed into the limiting sleeve (8) and locked. At the same time, the frustum (12) also hugs the screw (10) to restrict the screw (10) from moving to the left.

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