Electric power cross arm

Abstract

The invention discloses an electric power cross arm which is fixed to an electric pole and comprises two cross rods, a first fixing assembly, a second fixing assembly and two sets of anti-skid assemblies, and the anti-skid assemblies are arranged at the two ends of the cross rods correspondingly. The anti-skid assembly comprises a connecting plate, the two ends of the connecting plate are fixedly connected with the two transverse rods respectively, a vertical plate is fixedly connected to the middle of the bottom face of the connecting plate, a transverse plate is arranged at the bottom end of the vertical plate, and the transverse plate is slidably and rotationally connected with the vertical plate. The end, close to the electric pole, of the transverse plate is fixedly connected with a supporting rod, and the second fixing assembly is provided with a fixing base. A connecting block is fixedly connected to the bottom end of the supporting rod, and a limiting plate is fixedly connected to the side face, close to the electric pole, of the connecting block and makes contact with the outer wall of the electric pole. The connection stability between the cross arm and the electric pole can be improved, and displacement caused by looseness of the cross arm is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power cable suspension equipment, and in particular to a power crossarm. Background Art

[0002] Power crossarms are essential metal components used to support and secure key components such as conductors and insulators in power lines. They are typically installed on poles or towers, either horizontally or at a specific angle. They are secured to the poles and towers using bolts, U-shaped clamps, and other connectors, providing reliable mechanical support for the conductors and ensuring safe line spacing even in complex operating conditions such as wind deflection and icing.

[0003] Existing power crossarms are usually fixed to the top surface of the pole by clamps or bolts. The fixing method is simple, the contact between the pole and the crossarm is not tight during installation, and the bolt pre-tightening force is insufficient, which easily leads to a decrease in the friction between the crossarm and the pole. In addition, under the influence of long-term wind force and cable shaking, the connection between the power crossarm and the pole becomes loose. Once the crossarm is loose and displaced, it will destroy the safe distance between the conductor and the surrounding facilities, causing leakage, short circuit and other faults.

[0004] Therefore, it is necessary to develop a power cross arm to address the above defects. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric cross arm, which can improve the stability of the connection between the cross arm and the pole and avoid the cross arm from loosening and causing displacement.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides an electric crossarm fixed to an electric pole, characterized in that it comprises two crossbars, a first fixing assembly, a second fixing assembly, and an anti-slip assembly. The two crossbars are fixedly connected to the electric pole via the first fixing assembly, and insulating porcelain bottles are provided at both ends of the two crossbars. The second fixing assembly is disposed below the crossbars and fixedly connected to the electric pole. The anti-slip assembly is provided in two sets, one at each end of the crossbars. The anti-slip assembly comprises a connecting plate, each of which is fixedly connected to the two crossbars at both ends. A vertical plate is fixedly connected to the middle of the bottom surface of the connecting plate, and a horizontal plate is provided at the bottom end of the vertical plate, and the horizontal plate is slidably and rotatably connected to the vertical plate. The crossbar is fixedly connected to a support rod near one end of the electric pole, and a fixing seat is provided on the second fixing assembly, and the bottom end of the support rod is rotatably connected to the fixing seat. The bottom end of the support rod is fixedly connected to a connecting block, and the connecting block is fixedly connected to a limit plate near a side of the electric pole, and the limit plate is disposed in contact with the outer wall of the electric pole.

[0008] Furthermore, the first fixing assembly includes two clamping blocks and two threaded rods, the two clamping blocks are fixedly connected to the side walls facing the two cross bars, and the side walls facing the two clamping blocks are arc-shaped structures; the cross bars at both ends of the two clamping blocks are provided with mounting holes, and the two threaded rods respectively pass through the mounting holes at both ends of the two cross bars and are fixed by nuts.

[0009] Furthermore, the second fixing assembly includes two clamps, and the two clamps are fixedly connected to the pole via bolts.

[0010] Furthermore, the fixing seat includes a fixing block, which is fixedly connected to the side wall of the clamp, and a groove that passes through the clamp is opened on the top surface of the fixing block. The top surfaces of the fixing blocks located on both sides of the groove are fixedly connected to support plates, and the connecting block is rotatably connected between the two support plates.

[0011] Furthermore, a first sliding hole is opened through the top surface of the horizontal plate along its length direction, and the vertical plate is slidably connected in the first sliding hole; a second sliding hole is opened through the side wall of the horizontal plate and is connected to the first sliding hole, and sliding columns adapted to the second sliding holes are fixedly connected to the two side walls of the vertical plate, and the sliding columns are slidably connected to the second sliding holes.

[0012] Furthermore, the limiting plate includes a first limiting plate and a second limiting plate, the first limiting plate is fixedly connected to the top end of the side wall of the connecting block, and the second limiting plate is fixedly connected to the bottom end of the side wall of the connecting block.

[0013] Furthermore, the first limiting plate and the second limiting plate are arranged at an angle therebetween, and the angle between the first limiting plate and the second limiting plate is not less than 30° and not more than 150°.

[0014] Furthermore, the number of the insulating porcelain bottles is four and they are symmetrically arranged in pairs at both ends of the cross bar, and a buffer assembly is provided between the two insulating porcelain bottles located at the same end of the two cross bars and the cross bar.

[0015] Furthermore, the buffer assembly includes a fixed plate, the two ends of which are fixedly connected to the top surfaces of the two cross bars, the top surface of the fixed plate is slidably connected to a mounting plate, the two top surfaces of the mounting plate are provided with a first sliding groove, a first slider is slidably connected in the first sliding groove, the insulating porcelain bottle is fixedly connected to the first slider, the side walls at both ends of the first slider are fixedly connected to a first spring, and the first spring is fixedly connected to the inner wall of the first sliding groove at one end away from the first slider.

[0016] Furthermore, mounting blocks are fixedly connected to the top surfaces at both ends of the fixed plate, and a second sliding groove is provided on the side walls opposite to the two mounting blocks, a second slider is slidingly connected in the second sliding groove, and second springs are fixedly connected to the side walls at both ends of the second slider, and the second spring is fixedly connected to the inner wall of the second sliding groove at one end away from the second slider.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention fixes two crossbars to the electric pole through a first fixing assembly, and simultaneously connects the crossbars to the electric pole from below through a second fixing assembly. The two crossbars are connected to the second fixing assembly through an anti-slip assembly, forming a double fixation above and below, thereby enhancing the connection strength between the crossbars and the electric pole. Due to the provision of the anti-slip assembly, when the crossarm is subjected to external forces such as wind force and wire tension, and the crossarm has a slight tendency to slide, the external force is transmitted through the crossbar to the connecting plate and vertical plate of the anti-slip assembly. One end of the support rod is connected to the crossbar, and the other end is rotatably connected to the fixing seat of the second fixing assembly, forming a lever structure. When the crossarm is subjected to force, the crossbar transmits the force through the vertical plate and the crossbar to the support rod. Through the lever action, the limit plate is made to fit the surface of the electric pole. The greater the external force, the greater the thrust of the support rod on the limit plate, which increases the clamping force of the two limit plates on the electric pole and increases the friction until the friction and external force reach a new balance, thereby preventing the crossbar from sliding on the electric pole and ensuring that the crossarm is stably fixed on the electric pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the power cross arm of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the cross bar and the first fixing assembly of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the anti-slip component and the second fixing component of the present invention;

[0023] Figure 4 It is a partial structural schematic diagram of the anti-slip assembly of the present invention;

[0024] Figure 5 is a schematic diagram of the three-dimensional structure of the buffer assembly of the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the buffer assembly of the present invention when it is exploded.

[0026] Explanation of reference signs: 1, electric pole; 2, cross pole; 3, first fixing assembly; 301, clamping block; 302, threaded rod; 303, nut; 304, mounting through hole; 4, second fixing assembly; 401, hoop; 402, bolt; 5, anti-skid assembly; 501, connecting plate; 502, vertical plate; 503, horizontal plate; 504, supporting rod; 505, connecting block; 506, first sliding hole; 507, second sliding hole; 508, sliding column; 509, first limiting plate; 510, second limiting plate; 6, insulating porcelain bottle; 7, fixing seat; 701, fixing block; 702, groove; 703, supporting plate; 8, buffer assembly; 801, fixing plate; 802, mounting plate; 803, first sliding groove; 804, first sliding block; 805, first spring; 806, mounting block; 807, second sliding groove; 808, second sliding block; 809, second spring. DETAILED DESCRIPTION

[0027] The core of the present application is to provide an electric power cross arm, which can improve the stability of the connection between the cross arm and the electric pole, and avoid displacement caused by loosening of the cross arm.

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In a specific embodiment of the present application, as Figure 1 and Figure 3As shown, it is fixed to the pole 1 and includes two crossbars 2, a first fixing assembly 3, a second fixing assembly 4, and an anti-slip assembly 5. The two crossbars 2 are fixedly connected to the pole 1 via the first fixing assembly. Insulating porcelain bottles 6 are installed at both ends of the two crossbars 2 to support and secure the conductors. The second fixing assembly is arranged below the crossbars 2 and fixedly connected to the pole 1, serving to assist in securing the crossbars 2. The anti-slip assembly 5 is provided in two sets, one at each end of the crossbars 2, to prevent relative sliding between the crossbars 2 and the pole 1. The anti-slip assembly 5 includes a connecting plate 501, each of which is fixedly connected to the two crossbars 2 at its ends. A vertical plate 502 is fixedly connected to the middle of the bottom surface of the connecting plate 501. A horizontal plate 503 is provided at the bottom end of the vertical plate 502. The horizontal plate 503 and the vertical plate 502 are slidably and rotatably connected. The horizontal plate 503 is fixedly connected to the end of the horizontal plate 503 near the pole 1. A fixing seat 7 is provided on the second fixing assembly 4. The bottom of the support rod 504 is rotatably connected to the fixing seat 7. A connecting block 505 is fixedly connected to the bottom end of the support rod 504. The connecting block 505 is fixedly connected to a limit plate near a side of the pole 1. The limit plate is arranged in contact with the outer wall of the pole 1.

[0031] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the first fixing assembly 3 includes two clamping blocks 301 and two threaded rods 302. The two clamping blocks 301 are fixedly connected to the side walls of the two crossbars 2. The side walls facing the two clamping blocks 301 are curved structures, which can better fit the cylindrical surface of the pole 1. The crossbars 2 at both ends of the two clamping blocks 301 are provided with mounting holes 304. The two threaded rods 302 respectively penetrate the mounting holes 304 at both ends of the two crossbars 2 and are fixed by nuts 303, clamping the clamping blocks 301 to the pole 1, achieving preliminary fixation of the crossbar 2 to the pole 1.

[0032] In one embodiment of the present invention, Figure 1 and Figure 3 As shown, the second fixing assembly 4 includes two clamps 401, which are arranged around the pole 1 and fastened by bolts 402. The clamps 401 provide additional support and fixing points for the crossbar 2, thereby enhancing the overall stability of the power crossarm.

[0033] Specifically, the fixing base 7 includes a fixing block 701, which is fixedly connected to the side wall of the clamp 401. The fixing block 701 has a groove 702 on its top surface that penetrates the clamp 401. Support plates 703 are fixedly connected to the top surface of the fixing block 701 on both sides of the groove 702. The connecting block 505 is rotatably connected between the two support plates 703, allowing the support rod 504 and the limit plate to adapt to changes in a certain angle.

[0034] In one embodiment of the present invention, Figure 3 and Figure 4As shown, a first sliding hole 506 is formed through the top surface of the horizontal plate 503 along its length, and the vertical plate 502 is slidably connected to the first sliding hole 506. A second sliding hole 507 is formed through the side wall of the horizontal plate 503 and communicates with the first sliding hole 506. Sliding posts 508 are fixedly connected to the side walls of the vertical plate 502, and the sliding posts 508 are slidably connected to the second sliding holes 507. This achieves a sliding and rotational connection between the horizontal plate 503 and the vertical plate 502.

[0035] In one embodiment of the present invention, Figure 4 As shown, the limiting plate includes a first limiting plate 509 and a second limiting plate 510 . The first limiting plate 509 is fixedly connected to the top end of the side wall of the connecting block 505 , and the second limiting plate 510 is fixedly connected to the bottom end of the side wall of the connecting block 505 .

[0036] Specifically, the first limiting plate 509 and the second limiting plate 510 are arranged at an angle, and the angle between the first limiting plate 509 and the second limiting plate 510 is not less than 30° and not more than 150°. When the cross bar 2 moves downward, the second limiting plate 510 can clamp the pole through the support rod 504, thereby increasing the friction between the second limiting plate 510 and the surface of the pole 1. When the cross bar 2 moves upward, the first limiting plate 509 can clamp the pole through the support rod 504, thereby increasing the friction between the first limiting plate 509 and the surface of the pole 1. The first limiting plate 509 and the second limiting plate 510 can simultaneously prevent the cross bar 2 from moving upward or downward.

[0037] In one embodiment of the present invention, Figure 1 、 Figure 5 and Figure 6 As shown, there are four insulating porcelain bottles 6 and they are symmetrically arranged in pairs at both ends of the cross bar 2. A buffer assembly 8 is provided between the two insulating porcelain bottles located at the same end of the two cross bars 2 and the cross bars 2.

[0038] Specifically, the buffer assembly 8 includes a fixed plate 801, the two ends of which are fixedly connected to the top surfaces of the two cross bars 2. The top surface of the fixed plate 801 is slidably connected to a mounting plate 802. The top surface of the mounting plate 802 is provided with two first sliding grooves 803. A first slider 804 is slidably connected in the first sliding grooves 803. The insulating porcelain bottle 6 is fixedly connected to the first slider 804. The side walls of the first slider 804 are fixedly connected to first springs 805. The end of the first spring 805 away from the first slider 804 is fixedly connected to the inner wall of the first sliding groove 803. When lateral shaking occurs, the insulating porcelain bottle drives the first slider 804 to slide in the first sliding groove 803, and the first spring 805 is compressed, slowing down the speed and impact of the insulating porcelain bottle 6. When the wire returns to its position, the first spring 805 releases the stored elastic potential energy, pushing the first slider 804 to return to its original position, preventing the impact force from being directly transmitted to the cross bar 2 and reducing the risk of the cross bar 2 loosening due to vertical vibration.

[0039] Specifically, mounting blocks 806 are fixedly connected to the top surfaces of both ends of the fixing plate 801. Second sliding grooves 807 are provided on the side walls facing the two mounting blocks 806. Second sliders 808 are slidably connected within the second sliding grooves 807. Second springs 809 are fixedly connected to the side walls of both ends of the second sliders 808. The end of the second spring 809 away from the second sliders 808 is fixedly connected to the inner wall of the second sliding grooves 807. The two ends of the mounting plate 802 are respectively fixedly connected to the two second sliders 808. When the conductor is subjected to radial wind force and other effects and swings, the insulating porcelain bottle 6 drives the mounting plate 802 to move radially, causing the second sliders 808 to slide within the second sliding grooves 807. The second springs 809 are then stretched or compressed to offset the radial impact force and prevent the crossbar 2 from loosening or shifting between the pole and the crossbar 2 due to excessive radial force.

[0040] Working Principle of the Invention: The power crossarm of the present invention initially secures the crossbar 2 to the pole 1 via the clamping block 301 and threaded rod 302 of the first fixing assembly 3. The clamp 401 of the second fixing assembly 4 further secures the crossbar 2 from below, enhancing the stability of the connection between the crossbar 2 and the pole 1. When the crossbar 2 is subjected to external forces such as wind and conductor tension, and exhibits a slight tendency to slide, the external force is transmitted through the crossbar 2 to the connecting plate 501 and vertical plate 502 of the anti-slip assembly. The crossbar 2 is then connected to the crossbar 503 via a support rod 504 at one end and rotatably connected to the fixing base 7 on the clamp 401 at the other end, forming a lever structure. When the crossbar 2 tends to be displaced by external force, the vertical plate 502 drives the crossbar 503 to move through the sliding column 508, driving the support rod 504 to rotate around the fixed seat 7, so that the first limit plate 509 or the second limit plate 510 presses the surface of the pole 1. The greater the external force, the greater the thrust of the support rod 504 on the limit plate, thereby increasing the clamping force of the two limit plates on the pole 1 and increasing the friction until the friction and the external force reach a new balance, thereby preventing the crossbar 2 from sliding on the pole 1 and ensuring that the crossarm is stably fixed on the pole.

[0041] When the conductor shakes due to wind or other factors, the insulating porcelain bottle 6 drives the mounting plate 802 of the buffer assembly 8 to move, and the first spring 805 and the second spring 809 are compressed or stretched to absorb and buffer the impact force caused by the shaking of the conductor, reduce the vibration of the crossbar 2, protect the connection part of the power crossarm, and reduce the risk of loosening.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0043] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. An electric cross arm fixed on an electric pole (1), characterized in that: It comprises two cross bars (2), a first fixing assembly (3), a second fixing assembly (4) and an anti-slip assembly (5); The two cross bars (2) are fixedly connected to the electric pole (1) via the first fixing assembly, and insulating porcelain bottles (6) are provided at both ends of the two cross bars (2); The second fixing assembly is arranged below the crossbar (2) and is fixedly connected to the electric pole (1); The anti-slip components (5) are in two groups and are respectively arranged at the two ends of the cross bar (2); the anti-slip components (5) include a connecting plate (501), the two ends of the connecting plate (501) are respectively fixedly connected to the two cross bars (2), a vertical plate (502) is fixedly connected to the middle position of the bottom surface of the connecting plate (501), a horizontal plate (503) is arranged at the bottom end of the vertical plate (502), and the horizontal plate (503) is connected to the vertical plate (502) in a sliding and rotational manner. The horizontal plate (503) is fixedly connected to a support rod (504) near one end of the electric pole (1); a fixing seat (7) is provided on the second fixing assembly (4); the bottom of the support rod (504) is rotatably connected to the fixing seat (7); the bottom end of the support rod (504) is fixedly connected to a connecting block (505); the connecting block (505) is fixedly connected to a limiting plate near one side of the electric pole (1); the limiting plate is arranged in contact with the outer wall of the electric pole (1).

2. The power cross arm according to claim 1, characterized in that: The first fixing assembly (3) comprises two clamping blocks (301) and two threaded rods (302), wherein the two clamping blocks (301) are fixedly connected to the side walls facing the two cross bars (2), and the side walls facing the two clamping blocks (301) are arc-shaped structures; the cross bars (2) at both ends of the two clamping blocks (301) are provided with mounting through holes (304), and the two threaded rods (302) respectively pass through the mounting through holes (304) at both ends of the two cross bars (2) and are fixed by nuts (303).

3. The power cross arm according to claim 1, characterized in that: The second fixing assembly (4) comprises two hoops (401), and the two hoops (401) are fixedly connected to the pole (1) via bolts (402).

4. The power cross arm according to claim 3, characterized in that: The fixing seat (7) includes a fixing block (701), the fixing block (701) is fixedly connected to the side wall of the clamp (401), a groove (702) penetrating the clamp (401) is provided on the top surface of the fixing block (701), and support plates (703) are fixedly connected to the top surfaces of the fixing blocks (701) located on both sides of the groove (702), and the connecting block (505) is rotatably connected between the two support plates (703).

5. The power cross arm according to claim 1, characterized in that: The top surface of the horizontal plate (503) is provided with a first sliding hole (506) along its length direction, and the vertical plate (502) is slidably connected in the first sliding hole (506); the side wall of the horizontal plate (503) is provided with a second sliding hole (507) connected to the first sliding hole (506), and the two side walls of the vertical plate (502) are fixedly connected with sliding columns (508) adapted to the second sliding hole (507), and the sliding columns (508) are slidably connected to the second sliding hole (507).

6. The power cross arm according to claim 1, characterized in that: The limiting plate comprises a first limiting plate (509) and a second limiting plate (510), wherein the first limiting plate (509) is fixedly connected to the top end of the side wall of the connecting block (505), and the second limiting plate (510) is fixedly connected to the bottom end of the side wall of the connecting block (505).

7. The power cross arm according to claim 6, characterized in that: The first limiting plate (509) and the second limiting plate (510) are arranged at an angle, and the angle between the first limiting plate (509) and the second limiting plate (510) is not less than 30° and not more than 150°.

8. The power cross arm according to claim 1, characterized in that: The insulating porcelain bottles (6) are four in number and are symmetrically arranged in pairs at both ends of the cross bar (2). A buffer assembly (8) is provided between the two insulating porcelain bottles located at the same end of the two cross bars (2) and the cross bar (2).

9. The power cross arm according to claim 8, characterized in that: The buffer assembly (8) includes a fixed plate (801), the two ends of the fixed plate (801) are respectively fixedly connected to the top surfaces of the two cross bars (2), the top surface of the fixed plate (801) is slidably connected to a mounting plate (802), the two top surfaces of the mounting plate (802) are provided with a first slide groove (803), a first slider (804) is slidably connected in the first slide groove (803), the insulating porcelain bottle (6) is fixedly connected to the first slider (804), the side walls at both ends of the first slider (804) are fixedly connected to a first spring (805), and the end of the first spring (805) away from the first slider (804) is fixedly connected to the inner wall of the first slide groove (803).

10. The power cross arm according to claim 9, characterized in that: The top surfaces at both ends of the fixed plate (801) are fixedly connected with mounting blocks (806), and a second sliding groove (807) is provided on the side walls facing the two mounting blocks (806). A second slider (808) is slidably connected in the second sliding groove (807), and a second spring (809) is fixedly connected to the side walls at both ends of the second slider (808), and the second spring (809) is fixedly connected to the inner wall of the second sliding groove (807) at one end away from the second slider (808).

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