Bolt-type elastic wire clamp

Abstract

The present invention discloses a bolt-type elastic wire clamp, which relates to the technical field of parallel groove clamps. At present, when different personnel install wire clamps, the pressure applied to the wire is different, which affects the service life and stability of the wire. The present invention includes a wire clamp seat and a wire clamping unit. The wire clamping unit includes an upper clamping piece and a lower clamping piece that are detachably fixed on both sides of the wire clamp seat. In the installation of this technical solution, the fastening pressure on the same wire clamp is ensured to be consistent by adjusting the bolts, and it can adapt to wires of different diameters. Without replacing the wire clamp, the fixing requirements of wires of different specifications can be met. Through the elastic seat, the stress relaxation problem caused by wire creep is effectively reduced, ensuring the continuous gripping force of the wire clamp on the wire and the stability of the connection. When the wire undergoes creep, continuous pressure compensation can be provided to ensure the close fit between the wire and the wire clamp, and avoid the occurrence of poor contact and increased resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of parallel groove clamps, and particularly to bolt-type elastic wire clamps. Background Art

[0002] Parallel groove clamps are used for the connection of medium and small cross-section aluminum stranded wires or aluminum conductor steel-reinforced stranded wires and steel stranded wires of overhead lightning conductors at positions not under tension, and are also used for the jumper connection of non-straight towers;

[0003] In the actual application of bolt-type parallel groove clamps, the installation effect highly depends on the tightening degree of the bolts. However, this degree is often affected by human factors. If a measuring instrument is not used to accurately check the torque, there may be differences in the tightening pressure between the bolts on the same wire clamp or the pressure exerted on the wire when different personnel install the wire clamp. Excessive pressure will accelerate the creep of the wire and reduce its service life; while too little pressure may prevent the wire clamp and the wire from forming sufficient pressure and gripping force in the initial stage, thus affecting the stability of the connection. Especially under the stressed state, the wire is prone to creep, especially inside the parallel groove clamp where the local pressure is relatively large, and the creep phenomenon is particularly significant. Creep will cause the wire to gradually become thinner and its diameter to decrease. Without a corresponding compensation mechanism, the gripping force of the parallel groove clamp on the wire will weaken accordingly, leading to stress relaxation problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a bolt-type elastic wire clamp to solve the problems mentioned in the above background art, namely, there are differences in the pressure exerted on the wire when different personnel install the wire clamp. Excessive pressure will accelerate the creep of the wire and reduce its service life, while too little pressure may prevent the wire clamp and the wire from forming sufficient pressure and gripping force in the initial stage, thus affecting the stability of the connection.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A bolt-type elastic wire clamp, including a wire clamp seat and a wire clamping unit. The wire clamping unit includes an upper clip and a lower clip detachably fixed on both sides of the wire clamp seat;

[0006] A wire supporting seat is slidably installed in each of the two lower clips through a guiding chute, and the wire supporting seat can drive the wire to move between the upper clip and the lower clip along the guiding chute;

[0007] The wire is fixed between the upper clip and the lower clip through an elastic seat slidably installed in the groove of the wire supporting seat, realizing the close fit between the wire and the upper clip and the lower clip, and providing pressure compensation when the wire creeps;

[0008] It further includes an adjustment unit assembled on the wire clamp seat. The adjustment unit includes an adjustment bolt rotatably connected to the wire clamp seat. An expansion rod is threadedly connected to the adjustment bolt, and one end of the wire supporting seat is inserted into one end of the expansion rod.

[0009] Through the linkage design of the adjusting bolt and the telescopic rod, the two side wire supporting seats are forced to move synchronously along the guiding chute, ensuring that the clamping forces of the two side elastic seats on the wire are symmetrically distributed. This structure avoids the artificial force application deviation caused by tightening bolts one by one in traditional wire clamps, and ensures pressure consistency from the mechanical transmission level. The sliding installation design of the elastic seat in the groove of the wire supporting seat, combined with its own elastic characteristics, can maintain the contact pressure through elastic rebound when the wire undergoes radial creep (diameter reduction); at the same time, the sliding freedom of the wire supporting seat along the guiding chute allows for a small displacement during the axial creep of the wire, and the dual mechanisms cooperate to inhibit stress relaxation. The threaded fit between the adjusting bolt and the telescopic rod forms a linear displacement amplification mechanism. By rotating the adjusting bolt, the initial position of the wire supporting seat can be accurately controlled, thereby setting the pre-tightening force of the elastic seat on the wire, and avoiding pressure overload or insufficiency caused by relying on empirical operation in traditional bolt tightening. The detachable design of the upper clip and the lower clip enables key components such as the elastic seat and the wire supporting seat to be replaced separately. When the elastic seat undergoes plastic deformation due to long-term compression, there is no need to replace the wire clamp as a whole, reducing the maintenance cost. The thread pair of the adjusting bolt and the telescopic rod has a self-locking function, which can prevent the clamping force from attenuating due to thread loosening in a long-term vibrating environment, ensuring connection stability. The sliding trajectory constraint of the guiding chute on the wire supporting seat makes the force direction during wire clamping consistent with the axis of the chute, avoiding local stress concentration caused by angle deviation in traditional rigid clamping and delaying wire surface damage.

[0010] Through core designs such as synchronous drive pressure control, elastic-sliding dual compensation, modular maintenance, and self-locking anti-loosening, this technical solution systematically solves the connection reliability problems in the background technology caused by uncontrollable human operation, lack of creep compensation, high maintenance cost, vibration loosening, and stress concentration, upgrading the passive fixation of traditional wire clamps to an active pressure regulation system.

[0011] Preferably, the lower surface of the upper clip is not parallel to the upper surface of the lower clip, so that a gradually changing channel is formed between the upper clip and the lower clip, and the gradually changing channel can adapt to wires of different diameters.

[0012] Preferably, an arc-shaped chute is provided at the groove of the wire supporting seat, and the elastic seat is slidably installed in the arc-shaped chute through a slider.

[0013] Preferably, a spring is fixed on one side wall of the arc-shaped chute, and one end of the spring is connected to the slider, enabling the elastic seat to perform pressure compensation on the wire.

[0014] Preferably, the adjustment unit further includes a cover detachably fixed to the bottom of the wire clamp seat to protect the telescopic rod, and the adjusting bolt passes through one end of the telescopic rod and is rotatably installed on the inner bottom wall of the cover.

[0015] Preferably, the telescopic rod comprises a main rod threadedly sleeved on the adjusting bolt, a plurality of telescopic joints are inserted into the main rod, and one end of the wire supporting seat is inserted into one of the telescopic joints.

[0016] Preferably, a positioning bolt is threadedly connected to the front surface of the wire clamp seat, and one end of the positioning bolt passing through the wire clamp seat abuts against the adjusting bolt to limit the rotation of the adjusting bolt.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In the installation of this technical solution, the adjusting bolt is used to ensure that the fastening pressure on the same wire clamp remains consistent and can adapt to wires of different diameters. Without replacing the wire clamp, the fixing requirements for different specifications of wires can be met. The elastic seat effectively reduces the stress relaxation problem caused by wire creep, ensures the continuous holding force of the wire clamp on the wire and the stability of the connection. When the wire creeps, continuous pressure compensation can be provided to ensure the close fit between the wire and the wire clamp, and avoid the occurrence of poor contact and increased resistance.

[0019] 2. Further, through the arranged clamping piece, elastic seat and adjusting bolt, it is realized that during installation, the adjusting bolt can drive the wire on the elastic seat to slide upward in the gradually changing channel together, ensuring that the fastening pressure on the same wire clamp remains consistent. And through the design of the gradually changing channel, it can adapt to wires of different diameters, and without replacing the wire clamp, the fixing requirements for different specifications of wires can be met.

[0020] 3. Further, the cooperation between the elastic seat and the spring can effectively reduce the stress relaxation problem caused by wire creep, ensure the continuous holding force of the wire clamp on the wire and the stability of the connection. When the wire creeps, continuous pressure compensation can be provided to ensure the close fit between the wire and the wire clamp, and avoid the occurrence of poor contact and increased resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of the present invention.

[0022] Figure 2 is the structural plan schematic diagram of the present invention.

[0023] Figure 3 is the Figure 2 enlarged view of part A in the present invention.

[0024] Figure 4 is the structural schematic diagram of the lower clamping piece of the present invention.

[0025] Figure 5 is the structural disassembled schematic diagram of the present invention.

[0026] Figure 6The present invention is a schematic diagram of the internal structure of the telescopic rod after being cut open.

[0027] Figure 7 It is a structural schematic diagram of the wire clamping unit of the present invention in use state.

[0028] Figure 8 The present invention Figure 6 Enlarged view of point B in the middle.

[0029] Description of reference numerals:

[0030] 10. Wire clamp seat;

[0031] 20. Wire clamping unit; 21. Upper clamping piece; 22. Lower clamping piece; 23. Gradual channel; 24. Guide slide; 25. Wire support seat; 26. Elastic seat; 27. Arc slide; 28. Spring;

[0032] 30. Adjustment unit; 31. Adjustment bolt; 32. Telescopic rod; 321. Main rod; 322. Telescopic joint; 33. Cover body; 34. Positioning bolt. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 8 , the present invention provides a technical solution:

[0035] A bolt-type elastic wire clamp includes a bolt-type elastic wire clamp, including a wire clamp seat 10 and a wire clamping unit 20. The wire clamping unit 20 includes an upper clamping piece 21 and a lower clamping piece 22 which are detachably fixed on both sides of the wire clamp seat 10. The lower surface of the upper clamping piece 21 is not parallel to the upper surface of the lower clamping piece 22, so that a gradual channel 23 is formed between the upper clamping piece 21 and the lower clamping piece 22. The gradual channel 23 can adapt to wires of different diameters.

[0036] A wire support seat 25 is slidably installed in each of the two lower clamps 22 through a guide groove 24. The wire support seat 25 can carry the wire and move along the guide groove 24 between the upper clamp 21 and the lower clamp 22. The wire is fixed between the upper clamp 21 and the lower clamp 22 through an elastic seat 26 slidably installed in the groove of the wire support seat 25, thereby achieving a close fit between the wire and the upper clamp 21 and the lower clamp 22, and providing pressure compensation when the wire creeps.

[0037] It further includes an adjustment unit 30 assembled on the wire clamp seat 10. The adjustment unit 30 includes an adjustment bolt 31 rotatably connected to the wire clamp seat 10. A telescopic rod 32 is threadedly connected to the adjustment bolt 31. One end of the wire support seat 25 is inserted into one end of the telescopic rod 32.

[0038] More specifically, the wire support seat 25 can slide in the guide chute 24 through the guide sliders provided on both sides thereof, and will not fall off from the guide chute 24 during the sliding process. At the same time, it is inserted into the end of the telescopic rod 32 and can be telescoped within the telescopic rod 32. For its connection state with the telescopic rod 32 and the specific structure of the telescopic rod 32, see Figure 6 .

[0039] Specifically, when the wire is placed on the surface of the elastic seat 26, at this time, rotate the adjustment bolt 31, and the telescopic rod 32 moves upward. During the movement, it drives the wire support seat 25 to move upward along the guide chute 24. During the process, the elastic seat 26 and the wire thereon move obliquely upward together. During this process, the wire support seat 25 and the telescopic rod 32 gradually contract. When the elastic seat 26 moves obliquely upward, the wire on its surface gradually abuts and fixes against the bottom of the upper clip 21 due to the decrease in the inner diameter of the tapered channel 23. At the same time, since the inner diameter of the tapered channel 23 gradually decreases, by driving the wire support seat 25 to move to different heights, wires of different sizes can be fixed. At the same time, during the movement, the two wire support seats 25 move synchronously, so that the same pressure can be applied to the two wires.

[0040] Such as Figure 3 , Figure 4 and Figure 6 , an arc-shaped chute 27 is provided at the groove of the wire support seat 25. The elastic seat 26 is slidably mounted in the arc-shaped chute 27 through a slider. A spring 28 is fixed on one side wall of the arc-shaped chute 27. One end of the spring 28 is connected to the slider, so that the elastic seat 26 can perform pressure compensation on the wire;

[0041] More specifically, the elastic seat 26 slides in the arc-shaped chute 27 and is elastically abutted in the arc-shaped chute 27 through the spring 28, so that when cooperating with the tapered channel 23 to abut and fix the wire, pressure compensation can be performed.

[0042] Specifically, when the pressure is too high, the elastic seat 26 is abutted by the spring 28 and moves outward to reduce the pressure, avoiding excessive creep of the wire and ensuring the service life of the wire. When the pressure is too low, the spring 28 drives the elastic seat 26 to move inward to ensure sufficient pressure and grip force on the wire at the initial stage of operation, ensuring the reliability of the connection. At the same time, when the wire creeps, it provides the due pressure compensation, playing the role of providing a constant pressure.

[0043] Moreover, in cooperation with the gradient channel 23, it can ensure that the wire is in close contact with the bottom of the upper clip 21 and the surface of the elastic seat 26, avoiding the situation of poor contact that leads to an increase in contact resistance, thereby avoiding the generation of extra heat, and further avoiding the occurrence of local overheating that causes the wire to melt or the wire clamp to burn, thus ensuring the stability and reliability of the electrical connection.

[0044] Such as Figure 1 、 Figure 2 、 Figure 5 and Figure 6 In addition, the adjustment unit 30 further includes a cover body 33 detachably fixed to the bottom of the wire clamp seat 10, so that the telescopic rod 32 can be protected. One end of the adjusting bolt 31 passes through the telescopic rod 32 and is rotatably installed on the inner bottom wall of the cover body 33. A positioning bolt 34 is threadedly connected to the front surface of the wire clamp seat 10. One end of the positioning bolt 34 that penetrates into the wire clamp seat 10 abuts against the adjusting bolt 31, restricting the rotation of the adjusting bolt 31 after it rotates.

[0045] The telescopic rod 32 includes a main rod 321 threadedly sleeved on the adjusting bolt 31. A plurality of telescopic joints 322 are inserted into the main rod 321. One end of the wire supporting seat 25 is inserted into one of the telescopic joints 322.

[0046] Furthermore, in detail, during the telescopic process of the telescopic rod 32 and when the wire supporting seat 25 telescopes within the telescopic joint 322, it can only telescope within a certain range. Therefore, the telescopic joint 322 and the wire supporting seat 25 will not become detached.

[0047] Specifically, by controlling the forward and reverse rotation of the adjusting bolt 31, the main rod 321 can be driven to move up and down on the surface of the adjusting bolt 31. Then, through the telescopic joint 322, the wire supporting seat 25 is driven to move along the guiding chute 24. After the wire is moved to a position suitable for its size, in order to ensure that the adjusting bolt 31 is not affected by external forces, by tightening the positioning bolt 34, its end abuts against the adjusting bolt 31, further fixing the position of the adjusting bolt 31 so that it will not rotate due to external forces, and thus ensuring that the position of the wire will not change, guaranteeing its stability.

[0048] Working process:

[0049] 1. Preparation stage: Place the wire on the surface of the elastic seat 26 to ensure that the wire is located within the gradient channel 23;

[0050] 2. Preliminary adjustment: Rotate the adjusting bolt 31, and drive the telescopic rod 32 to move upward through threaded connection. During the movement of the telescopic rod 32, the wire supporting seat 25 is driven to move upward along the guiding chute 24;

[0051] 3. Wire fixation: When the wire support seat 25 moves, the elastic seat 26 and the wire thereon move obliquely upward. Since the inner diameter of the tapered channel 23 gradually decreases, the wire is gradually pushed against and fixed to the bottom of the upper clamping piece 21. By adjusting the height to which the wire support seat 25 moves, wires of different sizes can be fixed;

[0052] 4. Pressure compensation: The elastic seat 26 slides in the arc-shaped chute 27 and is elastically pressed by the spring 28. When the pressure is too high, the spring 28 presses the elastic seat 26 to move outward to reduce the pressure. When the pressure is too low, the spring 28 drives the elastic seat 26 to move inward to increase the pressure;

[0053] 5. Locking position: After the wire is fixed to a position suitable for its size, tighten the positioning bolt 34 so that its end abuts against the adjusting bolt 31 to lock the position of the adjusting bolt 31 and prevent the position of the wire from changing;

[0054] 6. Inspection and confirmation: Finally, check the fitting condition between the wire and the wire clamp to ensure there is no gap and it is tight, and check whether the adjustment unit 30 is firmly locked.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Bolt-type elastic wire clamp, comprising a wire clamp seat (10) and a wire clamping unit (20), characterized in that: The wire clamping unit (20) includes an upper clamping piece (21) and a lower clamping piece (22) detachably fixed to both sides of the wire clamp seat (10); A wire supporting seat (25) is slidably installed in each of the two lower clamping pieces (22) through a guiding chute (24), and the wire supporting seat (25) can move the wire along the guiding chute (24) between the upper clamping piece (21) and the lower clamping piece (22); The wire is fixed between the upper clamping piece (21) and the lower clamping piece (22) through an elastic seat (26) slidably installed in a groove of the wire supporting seat (25), so as to realize the close fit between the wire and the upper clamping piece (21) and the lower clamping piece (22), and provide pressure compensation when the wire creeps; It further includes an adjusting unit (30) assembled on the wire clamp seat (10). The adjusting unit (30) includes an adjusting bolt (31) rotatably connected to the wire clamp seat (10), a telescopic rod (32) is threadedly connected to the adjusting bolt (31), and one end of the wire supporting seat (25) is inserted into one end of the telescopic rod (32); An arc-shaped chute (27) is formed at the groove of the wire supporting seat (25), and the elastic seat (26) is slidably installed in the arc-shaped chute (27) through a slider; A spring (28) is fixed to one side wall of the arc-shaped chute (27), and one end of the spring (28) is connected to the slider, so that the elastic seat (26) can compensate the pressure on the wire.

2. The bolt-type elastic wire clamp according to claim 1, characterized in that: The lower surface of the upper clamping piece (21) is not parallel to the upper surface of the lower clamping piece (22), so that a gradually changing channel (23) is formed between the upper clamping piece (21) and the lower clamping piece (22), and the gradually changing channel (23) can adapt to wires with different diameters.

3. The bolt-type elastic wire clamp according to claim 1, characterized in that: The adjusting unit (30) further includes a cover body (33) detachably fixed to the bottom of the wire clamp seat (10) to protect the telescopic rod (32), and one end of the adjusting bolt (31) passes through the telescopic rod (32) and is rotatably installed on the inner bottom wall of the cover body (33).

4. The bolt-type elastic wire clamp according to claim 3, wherein: The telescopic rod (32) includes a main rod (321) threadedly sleeved on the adjusting bolt (31), and a plurality of telescopic joints (322) are inserted into the main rod (321), and one end of the wire supporting seat (25) is inserted into one of the telescopic joints (322).

5. The bolt-type elastic wire clamp according to claim 4, characterized in that: A positioning bolt (34) is threadedly connected to the front surface of the wire clamp seat (10), and one end of the positioning bolt (34) penetrating into the wire clamp seat (10) abuts against the adjusting bolt (31) to limit the rotation of the adjusting bolt (31).

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