A one-letter cable clamp

Abstract

The application provides a linear cable clamp, comprising a plurality of clamps and damping assemblies; the clamps are flexibly connected by the damping assemblies respectively to form the linear cable clamp; at least one clamp is fixedly connected with a support and at least one clamp is movably connected with the support, and the damping assembly is used for absorbing impact load in the linear direction, so that the impact load after a short circuit fault of the cable is reduced, and the damage probability of the cable clamp is greatly reduced. The flexible connection is realized by the damping assembly, the violent collision or high-frequency vibration between different phase clamps is hindered, the electromagnetic vibration energy of the cable in normal operation is consumed, the impact speed is reduced, the damping effect is improved, the damage of the clamps due to the fixed connection is avoided, the service life of the cable clamp is prolonged, and the clamp is suitable for different voltage grades, cable diameters, column spacings and tunnel sections.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission networks, and in particular to a straight-line cable clamp. Background Art

[0002] With the continuous improvement of urbanization, the demand for power transmission and distribution cables in urban construction will continue to grow, and urban cable line construction and power cable line design technologies are constantly developing. High-voltage power cable lines are mainly laid in cable tunnels, conduits, and cable trenches. The fixing and support of cables and their accessories mainly rely on the installation and use of cable hardware.

[0003] Cable hardware primarily consists of clamps, brackets, and columns, which are arranged in sections at regular intervals. Cables are secured to the brackets with clamps. When a short circuit occurs in the power grid, a large short-circuit current is generated, creating a strong magnetic field that acts on the current-carrying cables, subjecting them to significant electrodynamic forces. This electrodynamic force transmits the impact load to the clamps securing the cables through contact, causing plastic deformation in the hardware, posing a safety hazard or even causing it to break and fall off, impacting the safe and stable operation of the power grid. During normal power grid operation, the three-phase alternating current flowing through the cables induces an alternating magnetic field in the surrounding space. This alternating magnetic field also generates electrodynamic forces on the current-carrying cables. While this electrodynamic force is much smaller than in a short-circuit condition, it still causes vibration in the cables and hardware, resulting in loud noise under high loads and noise pollution. Prolonged vibration of the hardware can also damage the cable insulation, loosen the angle brackets, and damage the fixing bolts and hardware. Therefore, the clamps directly impact the load-bearing technical requirements of the cable lines during both normal operation and short-circuit conditions. The straight-line cable clamps in current technology are rigidly connected. When a short circuit occurs in a rigidly connected cable, the cable is subjected to a large impact load, which makes the cable clamp easily damaged. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art that the cable clamps are easily damaged, the present invention provides a straight-line cable clamp, comprising a plurality of clamps and a damping assembly; the clamps are flexibly connected by the damping assembly to form a straight-line cable clamp; wherein, at least one clamp is used to be fixedly connected to the bracket and at least one clamp is used to be movably connected to the bracket, and the damping assembly is used to absorb impact loads along the straight-line direction, thereby reducing the impact load after a short circuit fault occurs in the cable and greatly reducing the probability of damage to the cable clamp.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] The present invention provides a straight-line cable clamp comprising a plurality of clamps and a damping assembly;

[0007] The clamps are flexibly connected via damping components to form a straight-line cable clamp;

[0008] wherein at least one wire clamp is used for fixed connection with the bracket and at least one wire clamp is used for movably connection with the bracket;

[0009] The damping assembly is used to absorb impact loads in the straight direction.

[0010] The damping assembly comprises a first connecting plate (6), a spring and a second connecting plate (7);

[0011] The first connecting plate (6) and the second connecting plate (7) are arranged in parallel in the vertical direction, and the spring is arranged in parallel between the first connecting plate (6) and the second connecting plate (7) in the horizontal direction.

[0012] The gas spring is connected to the first connecting plate (6) and the second connecting plate (7) by bolts or welding.

[0013] The spring comprises: a gas spring (1) and / or a helical compression spring (2).

[0014] When the spring is a gas spring (1), there are two gas springs (1) arranged in parallel between the first connecting plate (6) and the second connecting plate (7).

[0015] When the spring is a helical compression spring (2), there are two helical compression springs (2) which are arranged in parallel between the first connecting plate (6) and the second connecting plate (7).

[0016] When the springs are a gas spring (1) and a helical compression spring (2), the gas spring (1) and the helical compression spring (2) are arranged in parallel between the first connecting plate (6) and the second connecting plate (7).

[0017] The gas spring (1) is a free-type gas spring, a self-locking gas spring or a traction gas spring.

[0018] The helical compression spring (2) is cylindrical in shape and is made of high carbon steel or stainless steel.

[0019] Each wire clamp comprises a base (4) and a cover plate (1); the base (4) is connected to the bracket, and the cover plate (1) is fixed to the base (4) by bolts.

[0020] The cover plate (1), base (4) and bracket (5) are all made of alloy or polymer material.

[0021] The alloy is an aluminum alloy.

[0022] The polymer material is glass fiber.

[0023] There are three wire clips.

[0024] Compared with the closest existing technology, the technical solution provided by the present invention has the following beneficial effects:

[0025] The inline cable clamp provided by the present invention includes a plurality of clamps and a damping assembly; the clamps are flexibly connected to each other through the damping assembly to form the inline cable clamp, wherein at least one clamp is fixedly connected to a bracket and at least one clamp is movably connected to the bracket; the damping assembly is used to absorb impact loads along the inline direction, reducing the impact load after a short circuit fault occurs in the cable, and greatly reducing the probability of damage to the cable clamp;

[0026] The straight-line cable clamp provided by the present invention will uniformly stretch or compress the gas spring and the helical compression spring when any two of the multiple clamps are relatively displaced, thereby preventing violent relative movement between them. The flexible connection achieved by the gas spring and the helical compression spring can prevent violent collisions or high-frequency vibrations between clamps of different phases, consume electromagnetic vibration energy of the cable during normal operation, reduce impact velocity, improve vibration reduction effect, avoid damage to the clamps due to fixed connection, and extend the service life of the cable clamp.

[0027] When the straight-line cable clamp provided by the present invention is installed, multiple clamps are used in a tight fit and a loose fit to ensure smooth relative sliding.

[0028] The straight-line cable clamp provided by the present invention can be used in environments with large short-circuit currents and high electromagnetic vibration intensity. Gas springs with different working strokes and working pressures can be used. The two sides can be installed symmetrically or asymmetrically to optimize the clamp displacement and load range.

[0029] The straight-line cable clamp provided by the present invention is suitable for different voltage levels, cable diameters, column spacings and tunnel sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a three-dimensional diagram of a straight-line cable clamp according to an embodiment of the present invention;

[0031] Figure 2 This is a front view of a straight-line cable according to an embodiment of the present invention;

[0032] Figure 3 This is a side view of a straight-line cable according to an embodiment of the present invention;

[0033] Figure 4 1 is a top view of a straight-line cable according to an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of a damping assembly in an embodiment of the present invention;

[0035] Figure 6 2. It is a front view of the cover plate in an embodiment of the present invention;

[0036] Figure 7 is a side view of a cover plate in an embodiment of the present invention;

[0037] Figure 8 is a top view of the cover plate in an embodiment of the present invention;

[0038] Figure 9 is a front view of a base in an embodiment of the present invention;

[0039] Figure 10 is a side view of the base in an embodiment of the present invention;

[0040] Figure 11 is a top view of the base in an embodiment of the present invention;

[0041] In the figure, 1-gas spring, 2-helical compression spring, 3-cover plate, 4-base, 5-bracket, 6-first connecting plate, 7-second connecting plate. DETAILED DESCRIPTION

[0042] The present invention will be described in further detail below with reference to the accompanying drawings.

[0043] The embodiment of the present invention provides a straight-line cable clamp, such as Figure 1-Figure 4 As shown, it realizes the function of supporting and electrically conducting cables of various voltage levels, various spans, and various cross-sections, and withstands various static loads of the cables during installation and operation, such as construction loads and axial deformation loads. The straight-line cable clamp provided by the embodiment of the present invention includes multiple clamps and damping components. The embodiment of the present invention adopts three clamps, and the clamps are flexibly connected by damping components to form a straight-line cable clamp.

[0044] Among them, at least one wire clamp is used for fixed connection with the bracket and at least one wire clamp is used for movably connection with the bracket, and the damping component is used for absorbing impact load along a straight line direction.

[0045] like Figure 5 As shown, the damping assembly includes a first connecting plate 6, a spring and a second connecting plate 7;

[0046] The first connecting plate 6 and the second connecting plate 7 are arranged in parallel in the vertical direction, and the spring is arranged in parallel between the first connecting plate 6 and the second connecting plate 7 in the horizontal direction. Figure 2 Defines the direction for the reference.

[0047] The spring is connected to the first connecting plate 6 and the second connecting plate 7 by bolts or welding.

[0048] The spring includes: a gas spring 1 and / or a helical compression spring 2.

[0049] When the spring is a gas spring 1 , there are two gas springs 1 , which are arranged in parallel between the first connecting plate 6 and the second connecting plate 7 .

[0050] When the spring is a helical compression spring 2 , there are two helical compression springs 2 , which are arranged in parallel between the first connecting plate 6 and the second connecting plate 7 .

[0051] When the springs are a gas spring 1 and a helical compression spring 2 , the gas spring 1 and the helical compression spring 2 are arranged in parallel between the first connecting plate 6 and the second connecting plate 7 .

[0052] The gas spring 1 is a free-type gas spring, a self-locking gas spring or a traction gas spring.

[0053] The helical compression spring 2 is cylindrical in shape and is made of high carbon steel or stainless steel.

[0054] Each wire clamp includes a base 4 and a cover plate 3. The base 4 is connected to the bracket, and the cover plate 3 is fixed to the base 4 by bolts.

[0055] The specific structure of the cover is as follows Figure 6-Figure 8 As shown, the specific structure of the base is as follows Figures 9-11 As shown, the cover plate 3, the base 4 and the bracket 5 are all made of alloy or polymer materials.

[0056] The alloy is aluminum alloy and the polymer material is glass fiber.

[0057] The straight-line cable clamp provided in the embodiment of the present invention can meet the requirements for fixing and installing cables in tunnels. It can also compensate for the deformation and displacement of the clamp caused by the impact load of the cable when a short circuit occurs in the power grid, and improve the ability to protect equipment from vibration caused by alternating electromagnetic effects during normal operation of the cable.

[0058] 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. Ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention with equivalents by referring to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. A straight-line cable clamp, characterized in that: Includes multiple wire clamps and damping assemblies; The clamps are flexibly connected to each other through a damping assembly to form a straight-line cable clamp, wherein at least one clamp is fixedly connected to the bracket and at least one clamp is movably connected to the bracket; the damping assembly is used to absorb impact loads along the straight-line direction; The damping assembly comprises a first connecting plate (6), a spring, and a second connecting plate (7); The first connecting plate (6) and the second connecting plate (7) are arranged in parallel in the vertical direction, and the spring is arranged in parallel between the first connecting plate (6) and the second connecting plate (7) in the horizontal direction; When the spring is a gas spring (1) and a helical compression spring (2), the gas spring (1) and the helical compression spring (2) are arranged in parallel between the first connecting plate (6) and the second connecting plate (7); Each of the wire clamps comprises a base (4) and a cover plate (3), wherein the base (4) is connected to the bracket, and the cover plate (3) is fixed to the base (4) by bolts; The cover plate (3), base (4) and bracket (5) are all made of alloy or polymer material.

2. The straight cable clamp according to claim 1, characterized in that: The spring is connected to the first connecting plate (6) and the second connecting plate (7) by bolts or welding.

3. The straight cable clamp according to claim 1, characterized in that: The gas spring (1) is a free-type gas spring, a self-locking gas spring or a traction gas spring.

4. The straight cable clamp according to claim 1, characterized in that: The helical compression spring (2) is cylindrical in shape and is made of high carbon steel or stainless steel.

5. The straight-line cable clamp according to claim 1, characterized in that: The alloy is aluminum alloy; the polymer material is glass fiber.

6. The straight-line cable clamp according to claim 1, characterized in that: There are three wire clips.

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