Bolt type elastic wire clamp

Abstract

The invention discloses a bolt type elastic wire clamp, and relates to the technical field of parallel groove clamps. At present, when different persons install wire clamps, pressure applied to wires is different, and the service life and stability of the wires are affected. The wire clamp comprises a wire clamp seat and a wire clamping unit. The wire clamping unit comprises an upper clamping piece and a lower clamping piece which are detachably fixed to the two sides of the wire clamp seat. According to the technical scheme, during installation, the fastening pressure on the same wire clamp is kept consistent through the adjusting bolt, the wire clamp adapts to wires with different diameters, the fixing requirements of the wires with different specifications can be met without replacing the wire clamp, the problem of stress relaxation caused by wire creep deformation is effectively reduced through the elastic seat, and the service life of the wire clamp is prolonged. The continuous gripping force of the wire clamp on the wire and the connection stability are ensured, so that when the wire creeps, continuous pressure compensation can be provided, the tight attachment between the wire and the wire clamp is ensured, and the conditions of poor contact and resistance increase are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of parallel groove wire clamps, in particular to a bolt-type elastic wire clamp. Background Art

[0002] The parallel groove clamp is used for connecting aluminum stranded wire or steel core aluminum stranded wire with small and medium cross-section and steel stranded wire of overhead lightning arrester at the position where it does not bear tension. It is also used for jumper connection of non-linear pole tower. In the actual application of bolt-type parallel groove wire clamps, the installation effect is highly dependent on the tightening degree of the bolts, which is often affected by human factors. If the torque is not accurately verified by measuring instruments, it may lead to the tightening pressure between the bolts on the same wire clamp, or different personnel may apply different pressures to the wires when installing the wire clamps. Excessive pressure will accelerate the creep of the wires and shorten their service life; while too little pressure may make it impossible for the wire clamp and the wire to form sufficient pressure and grip in the early stage, thereby affecting the stability of the connection. In particular, the wire is prone to creep under stress, especially inside the parallel groove wire clamp where the local pressure is large. The creep phenomenon is particularly significant. Creep will cause the wire to gradually become thinner and the diameter to decrease. If there is no corresponding compensation mechanism, the grip of the parallel groove wire clamp on the wire will be weakened, causing stress relaxation problems. Summary of the invention

[0003] The purpose of the present invention is to provide a bolt-type elastic wire clamp to solve the problem mentioned in the above background technology that different people apply different pressures to the wire when installing the wire clamp. Excessive pressure will accelerate the creep of the wire and shorten its service life, while too little pressure may make it impossible for the wire clamp and the wire to form sufficient pressure and gripping force in the early stage, thereby affecting the stability of the connection.

[0004] To achieve the above object, the present invention provides the following technical solution: a bolt-type elastic wire clamp, comprising a wire clamp seat and a wire clamping unit, wherein the wire clamping unit comprises an upper clamping piece and a lower clamping piece detachably fixed to two sides of the wire clamp seat; A wire support seat is slidably installed in each of the two lower clamping pieces through a guide slide groove, and the wire support seat can move along the guide slide groove with the wire between the upper clamping piece and the lower clamping piece; The conductor is fixed between the upper clamp and the lower clamp through an elastic seat slidably installed in the groove of the wire support seat, so that the conductor is closely fitted with the upper clamp and the lower clamp, and pressure compensation is provided when the conductor creeps; It also includes an adjustment unit assembled on the wire clamp seat, the adjustment unit includes an adjustment bolt rotatably connected to the wire clamp seat, a telescopic rod is threadedly connected to the adjustment bolt, and one end of the wire support seat is plugged into one end of the telescopic rod.

[0005] Through the linkage design of the adjustment bolt and the telescopic rod, the two sides of the wire support seats are forced to move synchronously along the guide slot to ensure that the clamping force of the elastic seats on the two sides on the wire is symmetrically distributed. This structure avoids the artificial force deviation caused by the need to tighten the bolts one by one in the traditional wire clamp, and ensures the consistency of pressure from the mechanical transmission level. The sliding installation design of the elastic seat in the groove of the wire support 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 support seat along the guide slot allows a slight displacement of the wire during axial creep, and the dual mechanism synergistically suppresses stress relaxation. The thread of the adjustment bolt and the telescopic rod cooperate to form a linear displacement amplification mechanism. The initial position of the wire support seat can be accurately controlled by rotating the adjustment bolt, so as to set the pre-tightening force of the elastic seat on the wire, avoiding the pressure overload or insufficient caused by the traditional bolt tightening operation relying on experience. The detachable design of the upper and lower clamps enables key components such as the elastic seat and the wire support 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 maintenance costs. 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 vibration environment, ensuring the stability of the connection. The guide slot constrains the sliding track of the wire support seat, so that the force direction during the wire clamping process is consistent with the axis of the slot, avoiding local stress concentration caused by angle deviation in traditional rigid clamping and delaying wire surface damage.

[0006] This technical solution systematically solves the connection reliability problems caused by uncontrollable human operation, lack of creep compensation, high maintenance cost, vibration loosening and stress concentration in the background technology through core designs such as synchronous transmission pressure control, elastic-sliding dual compensation, modular maintenance, and self-locking and anti-loosening. It upgrades the passive fixation of traditional wire clamps to an active pressure control system.

[0007] Preferably, the lower surface of the upper clamping piece is not parallel to the upper surface of the lower clamping piece, so that a gradual channel is formed between the upper clamping piece and the lower clamping piece, and the gradual channel can adapt to wires of different diameters.

[0008] Preferably, an arc-shaped slide groove is provided at the groove of the wire support seat, and the elastic seat is slidably installed in the arc-shaped slide groove through a sliding block.

[0009] Preferably, a spring is fixed on one side wall of the arc-shaped slide groove, and one end of the spring is connected to the slider, so that the elastic seat can perform pressure compensation on the wire.

[0010] Preferably, the adjustment unit further comprises a cover body detachably fixed to the bottom of the wire clamp seat, so that the telescopic rod can be protected, and the adjustment bolt passes through one end of the telescopic rod and is rotatably mounted on the inner bottom wall of the cover body.

[0011] Preferably, the telescopic rod comprises a main rod threadedly sleeved on an adjusting bolt, a plurality of telescopic joints are inserted into the main rod, and one end of the wire support seat is inserted into one of the telescopic joints.

[0012] Preferably, a positioning bolt is threadedly connected to the front surface of the wire clamp seat, and one end of the positioning bolt that penetrates into the wire clamp seat abuts against the adjusting bolt, so that the rotation of the adjusting bolt is restricted.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. During installation, this technical solution ensures that the tightening pressure on the same wire clamp remains consistent by adjusting the bolts, and adapts to wires of different diameters. The fixing requirements of wires of different specifications can be met without replacing the wire clamp. The elastic seat effectively reduces the stress relaxation problem caused by wire creep, ensures the continuous grip of the wire clamp on the wire and the stability of the connection, so that when the wire creeps, it can provide continuous pressure compensation, ensure the close fit between the wire and the wire clamp, and avoid poor contact and increased resistance.

[0014] 2. Furthermore, by providing the clip, elastic seat and adjusting bolt, it is achieved that during installation, the adjusting bolt can drive the wire on the elastic seat to slide upward in the gradient channel, ensuring that the tightening pressure on the same wire clamp remains consistent. The gradient channel design can adapt to wires of different diameters, and the fixing requirements of wires of different specifications can be met without replacing the wire clamp.

[0015] 3. Furthermore, the cooperation between the elastic seat and the spring can effectively reduce the stress relaxation problem caused by the creep of the wire, ensure the continuous grip of the wire clamp on the wire and the stability of the connection, so that when the wire creeps, it can provide continuous pressure compensation, ensure the close fit between the wire and the wire clamp, and avoid poor contact and increased resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic structural plane diagram of the present invention.

[0018] Figure 3 The present invention Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 It is a structural schematic diagram of the lower clamping piece of the present invention.

[0020] Figure 5 It is a schematic diagram of the structural decomposition of the present invention.

[0021] Figure 6The present invention is a schematic diagram of the internal structure of the telescopic rod after being cut open.

[0022] Figure 7 It is a structural schematic diagram of the wire clamping unit of the present invention in use state.

[0023] Figure 8 The present invention Figure 6 Enlarged view of point B in the middle.

[0024] Description of reference numerals: 10. Wire clamp seat; 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; 30. Adjustment unit; 31. Adjustment bolt; 32. Telescopic rod; 321. Main rod; 322. Telescopic joint; 33. Cover body; 34. Positioning bolt. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figures 1 to 8 , the present invention provides a technical solution: 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.

[0027] 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.

[0028] It also includes an adjustment unit 30 assembled on the wire clamp seat 10, and 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, and one end of the wire support seat 25 is inserted into one end of the telescopic rod 32.

[0029] In further detail, the wire support seat 25 can slide in the guide slot 24 through the guide sliders arranged on both sides thereof, and will not fall off from the guide slot 24 during the sliding process. At the same time, it is plugged into the end of the telescopic rod 32 and can be telescoped in the telescopic rod 32. The connection state between it and the telescopic rod 32 and the specific structure of the telescopic rod 32 are shown in FIG. Figure 6 .

[0030] Specifically, after the wire is placed on the surface of the elastic seat 26, the adjusting bolt 31 is rotated, and the telescopic rod 32 moves upward. During the movement, the wire support seat 25 moves upward along the guide slot 24. During the movement, the elastic seat 26 and the wire thereon move upward together. During the process, the wire support seat 25 and the telescopic rod 32 gradually shrink. When the elastic seat 26 moves upward, the wire on its surface gradually abuts against the bottom of the upper clamp 21 due to the reduction in the inner diameter of the gradual channel 23. At the same time, due to the gradual reduction in the inner diameter of the gradual channel 23, the wires of different sizes can be fixed by driving the wire support seat 25 to move to different heights. At the same time, during the movement, the wire support seats 25 on both sides move synchronously, so that the same pressure can be applied to the two wires.

[0031] like Figure 3 , Figure 4 and Figure 6 An arc-shaped slide groove 27 is provided at the groove of the support seat 25, and the elastic seat 26 is slidably installed in the arc-shaped slide groove 27 through a slider. A spring 28 is fixed on one side wall of the arc-shaped slide groove 27, and one end of the spring 28 is connected to the slider, so that the elastic seat 26 can compensate the pressure of the wire; In further detail, the elastic seat 26 slides in the arc-shaped slide groove 27 and is elastically pressed against the arc-shaped slide groove 27 by the spring 28, so that pressure compensation can be performed when the wire is pressed against and fixed in cooperation with the gradual channel 23.

[0032] Specifically, when the pressure is too great, the spring 28 pushes the elastic seat 26 to move outward to reduce the pressure, avoid excessive creep of the wire, and ensure the service life of the wire. When the pressure is too small, the spring 28 drives the elastic seat 26 to move inward to ensure that sufficient pressure and grip are provided to the wire in the initial operation to ensure the reliability of the connection. At the same time, when the wire creeps, proper pressure compensation is provided to provide a constant pressure.

[0033] In addition, the gradual channel 23 can ensure that the wire fits tightly with the bottom of the upper clamp 21 and the surface of the elastic seat 26, avoiding poor contact and increased contact resistance, thereby avoiding the generation of additional heat, and avoiding local overheating that causes the wire to melt or the wire clamp to burn, thereby ensuring the stability and reliability of the electrical connection.

[0034] like Figure 1 , Figure 2 , Figure 5 and Figure 6 The adjustment unit 30 also 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. The adjusting bolt 31 passes through one end of the telescopic rod 32 and is rotatably installed on the inner bottom wall of the cover body 33. The front surface of the wire clamp seat 10 is threadedly connected with a positioning bolt 34. One end of the positioning bolt 34 penetrates into the wire clamp seat 10 and abuts against the adjusting bolt 31, so that the adjusting bolt 31 is restricted after rotation.

[0035] 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 , and one end of the wire support seat 25 is inserted into one of the telescopic joints 322 .

[0036] In more detail, during the extension and retraction process of the telescopic rod 32 and the extension and retraction of the wire support seat 25 in the telescopic joint 322 , the telescopic rod 32 can only be extended and retracted within a certain range, so that the telescopic joint 322 and the wire support seat 25 will not be separated.

[0037] 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, and then the wire support seat 25 is driven to move along the guide groove 24 through the telescopic joint 322. When 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, the positioning bolt 34 is tightened so that its end is against the adjusting bolt 31, thereby fixing the position of the adjusting bolt 31 and preventing it from rotating due to external forces, thereby ensuring that the position of the wire does not change and its stability is guaranteed.

[0038] Working process: 1. Preparation stage: Place the wire on the surface of the elastic seat 26 to ensure that the wire is located in the gradient channel 23; 2. Preliminary adjustment: Rotate the adjusting bolt 31 to drive the telescopic rod 32 to move upward through the threaded connection. During the movement of the telescopic rod 32, the wire support seat 25 is driven to move upward along the guide slot 24; 3. Wire fixing: When the wire support seat 25 moves, the elastic seat 26 and the wire thereon move upward together. As the inner diameter of the gradual channel 23 gradually decreases, the wire is gradually pressed against and fixed at the bottom of the upper clamping piece 21. By adjusting the wire support seat 25 to move to different heights, wires of different sizes can be fixed; 4. Pressure compensation: The elastic seat 26 slides in the arc-shaped slide groove 27 and is elastically pressed against by the spring 28. When the pressure is too high, the spring 28 presses against 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. 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, locking the position of the adjusting bolt 31 to prevent the wire position from changing; 6. Check and confirm: Finally, check the fit between the wire and the clamp to ensure that there is no gap and that the adjustment unit 30 is firmly locked.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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. A 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) comprises an upper clamping piece (21) and a lower clamping piece (22) which are detachably fixed to two sides of the wire clamping seat (10); A wire support seat (25) is slidably mounted in each of the two lower clamping pieces (22) via a guide slot (24), and the wire support seat (25) can carry the wire and move along the guide slot (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 mounted in the groove of the wire support seat (25), so that the wire is closely fitted with the upper clamping piece (21) and the lower clamping piece (22), and pressure compensation is provided when creep occurs on the wire; It also includes an adjustment unit (30) mounted on the wire clamp seat (10), the adjustment unit (30) including an adjustment bolt (31) rotatably connected to the wire clamp seat (10), a telescopic rod (32) being threadedly connected to the adjustment bolt (31), and one end of the wire support seat (25) being plugged into one end of the telescopic rod (32).

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 gradual channel (23) is formed between the upper clamping piece (21) and the lower clamping piece (22), and the gradual channel (23) can adapt to wires of different diameters.

3. The bolt-type elastic wire clamp according to claim 1, characterized in that: An arc-shaped slide groove (27) is provided at the groove of the wire support seat (25), and the elastic seat (26) is slidably installed in the arc-shaped slide groove (27) via a slider.

4. The bolt-type elastic wire clamp according to claim 3, characterized in that: A spring (28) is fixed on one side wall of the arc-shaped slide groove (27), and one end of the spring (28) is connected to the slide block, so that the elastic seat (26) can perform pressure compensation on the wire.

5. The bolt-type elastic wire clamp according to claim 1, characterized in that: The adjustment unit (30) further comprises a cover body (33) detachably fixed to the bottom of the wire clamp seat (10) so that the telescopic rod (32) can be protected, and one end of the adjustment bolt (31) passes through the telescopic rod (32) and is rotatably mounted on the inner bottom wall of the cover body (33).

6. The bolt-type elastic wire clamp according to claim 5, characterized in that: The telescopic rod (32) comprises a main rod (321) threadedly sleeved on an adjusting bolt (31), a plurality of telescopic joints (322) being inserted into the main rod (321), and one end of the wire support seat (25) being inserted into one of the telescopic joints (322).

7. The bolt-type elastic wire clamp according to claim 6, characterized in that: 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), so that the rotation of the adjusting bolt (31) is restricted.

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