Screw anchor galloping suppression system for emergency rescue of power transmission line in plain area and construction method

Abstract

The invention discloses a spiral anchor galloping suppression system for emergency rescue of a power transmission line in a plain area and a construction method. The spiral anchor galloping suppression system comprises a lower spiral anchor foundation, an upper steel pipe stand column, an insulating stay wire, an insulator string, a wire clamp, a damper, a fitting string and other components, wherein the insulator string, the wire clamp, the damper and the fitting string are connected between the steel pipe stand column and the insulating stay wire in series; the spiral anchor foundation comprises an anchor rod, an anchor disc and a top seat, is connected with the steel pipe stand column into a whole through a groove-shaped hoop and is used for fixing an insulating stay wire. The device has the following beneficial effects that the spiral anchor is adopted as a foundation, the foundation and the upper steel pipe stand column are connected into a whole through the specially-made groove-shaped hoop, the insulating stay wire is fixed through the multiple layers of wire hanging plates on the steel pipe stand column, and the insulator string, the wire clamp, the damper, the hardware string and other components are connected between the insulating stay wire and the steel pipe stand column in series; the whole system can be quickly constructed and assembled on an emergency rescue site, can be completely recycled after emergency rescue is completed, and has high practical value.

Description

Technical Field

[0001] This invention belongs to the field of power transmission engineering technology, specifically relating to a spiral anchor suppression system for emergency repair of power transmission lines in plain areas. Background Technology

[0002] When encountering rain or snow, ice can form on the surface of transmission line conductors. If the wind direction is at a large angle to the line's alignment, this can cause conductor galloping. Galloping causes repeated, large-amplitude oscillations, leading to power outages. Prolonged, continuous galloping can also cause tower bolts to come loose or break. In severe cases, it can break conductors, snap crossarms, or even cause widespread tower collapses. To reduce power grid safety risks, transmission lines prone to galloping undergo a series of improvements and enhancements to improve their resistance to galloping. However, because the mechanism of conductor galloping is not yet fully understood, the problem still occurs frequently, seriously threatening the safe operation of my country's power grid.

[0003] Based on emergency response experience, the most direct and effective way to suppress power line galloping is to use temporary guy wires to hold the conductor in place, preventing it from galloping. However, because the force of galloping conductors is enormous, a relatively stable foundation is necessary to withstand the tension transmitted by the guy wires. Furthermore, since the location of galloping is unpredictable, foundations cannot be pre-installed; construction must only begin after galloping is detected. For plains or beaches with shallow groundwater levels, even using precast foundations requires dewatering before excavation, and dewatering takes too long, making it impossible to meet the time requirements for emergency response. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to meet the requirements of emergency repair, achieve rapid assembly, have a relatively stable foundation, and suppress the line galloping effect. Therefore, a spiral anchor anti-galloping system for emergency repair of transmission lines in plain areas is provided.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: A spiral anchor suppression system for emergency repair of power transmission lines in plain areas includes a spiral anchor foundation and a steel pipe column, which are connected as one unit by a channel-shaped clamp; multiple layers of hanging plate assemblies are installed on the steel pipe column, and the hanging plate assemblies are connected to the conductors by insulated pull wires.

[0006] The spiral anchor foundation includes an anchor rod with at least two anchor discs. The top of the anchor rod is connected to the spiral anchor top seat by a first bolt. The spiral anchor top seat includes a top seat plate and a sleeve is provided below the top seat plate. The anchor rod is inserted into the sleeve, and the first bolt fastens the sleeve and the anchor rod together.

[0007] At least four first stiffening plates are provided between the sleeve and the top plate; the top plate, sleeve and first stiffening plates are all welded together.

[0008] The steel pipe column includes a base plate, on which a steel pipe is installed. At least two layers of hanging plate groups are arranged axially on the steel pipe. Each hanging plate group includes at least two hanging plates. The hanging plates are distributed circumferentially along the steel pipe. The upper and lower ends of the hanging plates are welded to adjacent circumferential stiffening ribs, and the inner side is welded to the steel pipe.

[0009] A second stiffening plate is installed between the base plate and the steel pipe.

[0010] The grooved clamp consists of two semi-circular clamping rings, the two ends of which are connected together by a second bolt.

[0011] The clamping ring includes a semi-circular arc plate, with a semi-circular plate on each of the upper and lower sides of the arc plate, and a third stiffening plate at the connection between the two ends of the arc plate; the two semi-circular arc plates are arranged opposite each other to form a ring; the second bolt passes through the bolt holes at the connection between the two ends of the arc plate, and a gap is reserved between the connection between the two arc plates. By applying a tightening torque to the second bolt, the clamping ring tightly hugs the base plate and the top plate; the second bolt of the grooved clamp is arranged horizontally.

[0012] The hanging plate assembly on the steel pipe column is connected to the damper through the first hardware string. The other end of the damper is connected to the insulator string through the second hardware string. The other end of the insulator string is connected to the UT-type clamp through the third hardware string. The other end of the UT-type clamp is connected to the insulated guy wire. After the insulated guy wire passes around the conductor, both ends are fixed by the UT-type clamp.

[0013] A construction method for a spiral anchor suppression system for emergency repair of power transmission lines in plain areas includes the following steps: Step 1: Determine the location of the lowest point of the sag of the galloping conductor on site, and measure the distance from the lowest point to the ground; Step 2: Select two suitable locations for the spiral anchor foundation on site, calculate the tension of the insulated guy wire, and determine the specifications of the insulated guy wire, insulator string, hardware string and damper; Step 3: Select a spiral anchor and matching top seat, groove clamp, and steel pipe column that can provide sufficient anchoring force based on the tension of the guy wire and geological data; Step 4: Transport the equipment to the site and use the spiral anchor drilling rig to carry out the anchoring construction; Step 5: After screwing the auger to the predetermined depth, install the auger top seat; Step 6: Place steel pipe columns at the two spiral anchor foundation locations, install channel clamps, and pre-tighten the second bolts of the channel clamps; Step 7: Adjust the direction of the two steel pipe columns respectively so that each hanging plate is aligned with the direction of the lowest point of the conductor sag, and then tighten the second bolt of the groove clamp. Step 8: Use a catapult to launch the insulated guy wire; Step 9: Connect the insulator string, hardware string, and damper to complete the installation.

[0014] Compared with the prior art, the present invention has the following advantages: it uses a spiral anchor as the foundation, and connects the foundation and the upper steel pipe column into one unit through a specially made grooved clamp. The insulating guy wire is fixed by the multi-layer hanging plate on the steel pipe column. Insulator strings, wire clamps, dampers, hardware strings and other components are connected in series between the insulating guy wire and the steel pipe column. The entire system can be quickly assembled at the disaster relief site and can be completely recycled and reused after the disaster relief is completed, which has strong practical value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall system of the present invention; Figure 2 This is a schematic diagram of the anchor bolt and anchor plate of the spiral anchor foundation of the present invention; Figure 3 This is a schematic diagram of the helical anchor top seat of the helical anchor foundation of the present invention; Figure 4 This is a schematic diagram of the steel pipe column of the present invention; Figure 5 This is a schematic diagram of the connection between the spiral anchor foundation and the steel pipe column in this invention; Figure 6 This is a top view of the groove-shaped clamp of the present invention; Figure 7 This is a cross-sectional view (AA) of the steel pipe column of the present invention; Figure 8 This is a BB cross-sectional view of the steel pipe column of the present invention; Figure 9 This is a CC cross-sectional view of the connection between the spiral anchor foundation and the steel pipe column in this invention; Figure 10 This is a DD cross-sectional view of the connection between the spiral anchor foundation and the steel pipe column in this invention; Figure 11 This is a schematic diagram of the EE surface of the groove-shaped clamp of the present invention; Figure 12 This is a schematic diagram of the FF surface of the groove-shaped clamp of the present invention; Figure 13 This is a cross-sectional view of the grooved clamp of the present invention. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] like Figure 1 As shown, a spiral anchor damping system for emergency repair of transmission lines in plain areas includes a spiral anchor foundation, a steel pipe column, an insulated guy wire 2, an insulator string 5, a damper 6, a hardware string, and a UT-type clamp 3. The spiral anchor foundation and the steel pipe column are connected as one unit by a grooved clamp.

[0019] like Figure 2 As shown, the spiral anchor foundation includes an anchor rod 18, on which at least two anchor discs 19 are provided. The anchor rod 18 and the anchor discs 19 are connected together by welding. The top of the anchor rod 18 is connected to the spiral anchor top seat by a first bolt 20.

[0020] like Figure 3 As shown, the spiral anchor top seat includes a top seat plate 15, a sleeve 16 is provided below the top seat plate 15, an anchor rod 18 is inserted into the sleeve 16, and a first bolt 20 fastens the sleeve 16 and the anchor rod 18 together.

[0021] Better still, at least four first stiffening plates 17 are provided between the sleeve 16 and the top plate 15. In addition, the top plate 15, the sleeve 16 and the first stiffening plates 17 are all welded together.

[0022] like Figure 4 , Figure 7 , Figure 8 As shown, the steel pipe column includes a base plate 8, on which a steel pipe 7 is installed. At least two layers of hanging plate assemblies 11 are axially arranged on the steel pipe 7; each hanging plate assembly 11 includes at least two hanging plates 23, which are distributed circumferentially along the steel pipe 7. Figure 7 In this embodiment, in the hanging plate group 11 at the same height, four hanging plates 23 are provided on the steel pipe 7. The upper and lower ends of the hanging plates 23 are welded to the adjacent circumferential stiffening ribs 10, and the inner side is welded to the steel pipe 7.

[0023] Even better, a second stiffening plate 9 is provided between the base plate 8 and the steel pipe 7.

[0024] In this invention, the spiral anchor foundation and the steel pipe column are connected as a whole by a grooved clamp; for example... Figure 5 As shown, the grooved clamp fixes the spiral anchor foundation and the steel pipe column together by clamping the base plate 8 of the steel pipe column and the top seat plate 15 of the spiral anchor foundation.

[0025] like Figure 5 , Figure 6 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, the grooved clamp includes two semi-circular clamping rings 12, and the two ends of the two clamping rings 12 are connected together by a second bolt 14. It should be noted that the height of the clamping rings 12 is greater than the sum of the heights of the base plate 8 and the top plate 15.

[0026] Better, such as Figure 6 , Figure 9 , Figure 10 , Figure 12 As shown, the retaining ring 12 includes a semi-circular arc-shaped plate 121, with a semi-circular plate 122 on each of the upper and lower sides of the arc-shaped plate 121, and a third stiffening plate 13 at the connection between the two ends of the arc-shaped plate 121. In practice, the retaining ring 12 and the third stiffening plate 13 are welded together. During assembly, the two semi-circular arc-shaped plates 121 are arranged opposite each other, forming a ring; the second bolt 14 passes through the bolt holes at the connection between the two ends of the arc-shaped plate 121, and a gap 123 is reserved between the connection between the two arc-shaped plates 121. By applying a large tightening torque to the second bolt 14, the retaining ring 12 can tightly hold the base plate 8 and the top plate 15.

[0027] The second bolt 14 of the grooved clamp is arranged horizontally, so it will not bear the conductor galloping force transmitted by the insulated pull wire 2, thus avoiding loosening and wear of the second bolt 14 under repeated tension, and improving the safety and stability of the entire system.

[0028] The hanging plate assembly 11 on the steel pipe column is connected to the damper 6 via the first hardware string 22. The other end of the damper 6 is connected to the insulator string 5 via the second hardware string 21. The other end of the insulator string 5 is connected to the UT-type clamp 3 via the third hardware string 4. The other end of the UT-type clamp 3 is connected to the insulated guy wire 2. After the insulated guy wire 2 passes around the conductor 1, both ends are fixed by the UT-type clamp 3. The insulated guy wire 2 passes over the conductor 1, and its pulling position should preferably be the lowest point of the sag of the conductor 1. Both ends of the insulated guy wire 2 are connected to a steel pipe column via the insulator string 5, that is, the present invention sets up two steel pipe columns.

[0029] The steel pipe column is provided with a multi-layer hanging plate group 11 along the axial direction. By connecting the hanging plate group 11 at different heights, the tightness of the insulated pull wire 2 can be adjusted within a large range.

[0030] In addition, the tightness of the insulated pull wire 2 can be adjusted within a small range by adjusting the UT-type clamp 3.

[0031] The damper 6 is connected in series between the insulated guy wire 2 and the hanging plate group 11 of the steel pipe column, and plays a role in buffering and absorbing energy.

[0032] The steel pipe column is connected to the spiral anchor foundation through a grooved clamp. Before the second bolt 14 is tightened, the steel pipe column can be adjusted and rotated around its axis at will, so as to avoid the problem of rapid wear of the hanging plate 23 and the first hardware string 22 fixed on it under the repeated action of the kinetic force because the hanging plate 23 is not in the same plane as the insulated pull wire 2.

[0033] A construction method for a spiral anchor suppression system for emergency repair of power transmission lines in plain areas includes the following steps: Step 1: Determine the location of the lowest point of the sag of the galloping conductor on site, and measure the distance from the lowest point to the ground; Step 2: On both sides of the lowest point of the conductor sag, select a relatively open location for the spiral anchor foundation that is easy to access for work. Based on the upward force F that may be generated when the conductor gallops, use the mechanical equilibrium equation F=Tcosα+Tcosβ to determine the tension T of the insulated guy wire 2, which is used to determine the specifications of the insulated guy wire, insulator string, hardware string and damper. Step 3: Select a spiral anchor and matching components such as a top seat, groove clamp, and steel pipe column that can provide sufficient anchoring force based on the tension T of the guy wire and geological data; Step 4: Transport the equipment to the site and use the spiral anchor drilling rig to carry out the anchoring construction; Step 5: After screwing the auger to the predetermined depth, install the auger top seat; Step 6: Place the steel pipe column on the top seat of the spiral anchor foundation, install the channel clamp, and pre-tighten the second bolt of the channel clamp; Step 7: Adjust the direction of the steel pipe column so that the hanging plate is aligned with the lowest point of the conductor sag, and then tighten the second bolt of the groove clamp. Step 8: Use a catapult to launch insulated guy wire 2; Step 9: Connect the insulator strings, hardware strings, dampers, and other components to complete the installation.

[0034] A spiral anchor system for emergency repairs of power transmission lines in plain areas is disclosed. It employs a spiral anchor as its structural foundation, connecting the foundation to an upper steel pipe column via a specially designed grooved clamp. Insulated guy wires, designed to suppress conductor galloping, are fixed to the steel pipe column using hanging plates. Insulator strings, clamps, dampers, and hardware strings are connected in series between the guy wires and the steel pipe column for insulation, energy absorption, and connection. This proposed system provides sufficiently stable anchoring force to suppress conductor galloping. Furthermore, the entire system can be quickly assembled at the emergency site and can be fully recovered and reused after the emergency repairs are completed, demonstrating significant practical value.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A spiral anchor suppression system for emergency repair of power transmission lines in plain areas, characterized in that: It includes a spiral anchor foundation and a steel pipe column, which are connected as one unit by a grooved clamp; a multi-layer hanging plate group (11) is set on the steel pipe column, and the hanging plate group (11) is connected to the conductor (1) by an insulated pull wire (2).

2. The spiral anchor anti-galling system for emergency repair of power transmission lines in plain areas according to claim 1, characterized in that: The spiral anchor foundation includes an anchor rod (18), on which at least two anchor discs (19) are provided. The top of the anchor rod (18) is connected to the spiral anchor top seat by a first bolt (20). The spiral anchor top seat includes a top seat plate (15), and a sleeve (16) is provided below the top seat plate (15). The anchor rod (18) is inserted into the sleeve (16), and the first bolt (20) fastens the sleeve (16) and the anchor rod (18) together.

3. A spiral anchor suppression system for emergency repair of power transmission lines in plain areas according to claim 2, characterized in that: At least four first stiffening plates (17) are provided between the sleeve (16) and the top plate (15); the top plate (15), the sleeve (16) and the first stiffening plates (17) are all welded together.

4. A spiral anchor suppression system for emergency repair of power transmission lines in plain areas according to claim 1, characterized in that: The steel pipe column includes a base plate (8), on which a steel pipe (7) is installed. At least two hanging plate groups (11) are arranged along the axial direction on the steel pipe (7). Each hanging plate group (11) includes at least two hanging single plates (23). The hanging single plates (23) are distributed along the circumference of the steel pipe (7). The upper and lower ends of the hanging single plates (23) are welded to adjacent circumferential stiffening ribs (10), and the inner side is welded to the steel pipe (7).

5. A spiral anchor suppression system for emergency repair of power transmission lines in plain areas according to claim 4, characterized in that: A second stiffening plate (9) is provided between the base plate (8) and the steel pipe (7).

6. A spiral anchor anti-galling system for emergency repair of power transmission lines in plain areas according to claim 1, characterized in that: The grooved clamp includes two semi-circular clamps (12), and the two ends of the two clamps (12) are connected together by a second bolt (14).

7. A spiral anchor suppression system for emergency repair of power transmission lines in plain areas according to claim 6, characterized in that: The clamping ring (12) includes a semi-circular arc plate (121), with a semi-circular plate (122) on each of the upper and lower sides of the arc plate (121), and a third stiffening plate (13) at the connection of the two ends of the arc plate (121); the two semi-circular arc plates (121) are arranged opposite each other to form a ring; the second bolt (14) passes through the bolt hole at the connection of the two ends of the arc plate (121), and a gap (123) is reserved between the connection of the two arc plates (121). By applying a tightening torque to the second bolt (14), the clamping ring (12) tightly hugs the base plate (8) and the top plate (15); the second bolt (14) of the groove clamp is arranged horizontally.

8. A spiral anchor suppression system for emergency repair of power transmission lines in plain areas according to claim 1, characterized in that: The hanging plate group (11) on the steel pipe column is connected to the damper (6) through the first hardware string (22). The other end of the damper (6) is connected to the insulator string (5) through the second hardware string (21). The other end of the insulator string (5) is connected to the UT type clamp (3) through the third hardware string (4). The other end of the UT type clamp (3) is connected to the insulating pull wire (2). After the insulating pull wire (2) passes around the conductor (1), both ends are fixed by the UT type clamp (3).

9. A construction method for a spiral anchor suppression system for emergency repair of power transmission lines in plain areas, comprising the following steps: Step 1: Determine the location of the lowest point of the sag of the galloping conductor on site, and measure the distance from the lowest point to the ground; Step 2: Select two suitable locations for the spiral anchor foundation on site, calculate the tension of the insulated guy wire (2), and determine the specifications of the insulated guy wire, insulator string, hardware string and damper; Step 3: Select a spiral anchor and matching top seat, groove clamp, and steel pipe column that can provide sufficient anchoring force based on the tension of the guy wire and geological data; Step 4: Transport the equipment to the site and use the spiral anchor drilling rig to carry out the anchoring construction; Step 5: After screwing the auger to the predetermined depth, install the auger top seat; Step 6: Place steel pipe columns at the two spiral anchor foundation locations, install channel clamps, and pre-tighten the second bolts of the channel clamps; Step 7: Adjust the direction of the two steel pipe columns respectively so that each hanging plate is aligned with the direction of the lowest point of the conductor sag, and then tighten the second bolt of the groove clamp. Step 8: Use a catapult to launch the insulated guy wire (2); Step 9: Connect the insulator string, hardware string, and damper to complete the installation.

Images