A lightweight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device

Abstract

The present invention proposes a light, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device, the reinforcement device comprises a plurality of transverse connecting rods of adjustable length, the connecting rods are used in pairs for each tower transverse diaphragm, each pair of connecting rods is supported on the side transverse diaphragm material of the tower transverse diaphragm to form a cross-shaped reinforcement structure; the connecting rod comprises a plurality of sections of sub-rods connected in sequence, and a driving mechanism for adjusting the length of the connecting rod is provided at the mutually connected parts of the sub-rods, and the driving mechanism is a manual mechanism or an electric mechanism; the present invention is a flexible, light, high-strength, portable, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device, which can be widely used for line capacity expansion and reconstruction or temporary reinforcement of old towers before typhoons land.

Description

Technical Field

[0001] The invention relates to the technical field of power grid operation and maintenance, and in particular to a light-weight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device. Background Art

[0002] Permanent reinforcement of transmission towers is usually achieved by increasing the cross-section or replacing it with high-strength steel. A rod is added to the original rod by bolting or welding to increase the effective load-bearing cross-section; or Q420 high-strength steel is used to replace the existing Q235 or Q345 steel to improve the load-bearing performance under the same cross-section. These reinforcement methods are effective, but they often require large engineering workloads and long construction periods, and they also require a lot of investment. For some transmission towers that are only overloaded under extreme weather conditions, it is obviously unreasonable to spend a lot of manpower and material resources to resist extremely low probability and predictable natural external forces.

[0003] What follows is the temporary reinforcement of transmission towers, that is, temporary reinforcement of old transmission towers that do not meet extreme meteorological conditions before the arrival of a strong typhoon. Usually, reinforcement is carried out by laying guy wires before the typhoon lands. However, it is only effective for fixed wind directions. If the wind direction changes, multiple guy wires need to be laid, which is obviously not possible. At the same time, laying guy wires also involves land occupation issues, which cannot meet the requirements for many pole positions. In addition, it is difficult to lay guy wires for transmission towers around paddy fields, ponds, and streams due to soil and terrain issues, and the guy wires cannot be laid to the center of the road on the roadside. Therefore, the usual method of laying guy wires is not applicable.

[0004] The transmission tower is a highly flexible space truss structure. Strong wind is its controlling load. In order to ensure the overall force performance of the space truss structure and distribute shear force and torque, a transverse diaphragm is generally designed at every height of the transmission tower body. However, in previous wind-induced tower collapse accidents, it was found that many transmission towers failed in the middle of the two transverse diaphragms or in the upper part of the transverse diaphragm, resulting in tower collapse accidents. From the perspective of static analysis, the design of the transverse diaphragm can meet the structural requirements. However, from the dynamic analysis, it can be found that the first few vibration modes of the transmission tower are local vibration modes occurring in the tower body in the middle of the transverse diaphragm (see Figure 1 ), under the action of pulsating loads such as wind loads, it is easy for the main material to deform too much and cause instability and damage. Therefore, the transverse partition plays a great role in the wind resistance of the transmission tower. However, in the design of old transmission towers, the transverse partitions are too few and the spacing is too large, or the transverse partition structure is unreasonable, and the transverse partition material specifications are too small, which will cause the transverse partition effect to be not obvious, resulting in a decrease in the wind resistance of the entire tower. Therefore, effectively improving the transverse partition effect is also the key to the wind resistance reinforcement of the transmission tower.

[0005] If the structure of some diaphragms is unreasonable or the specifications of the diaphragms are too small, they will be damaged by wind. Figure 2Bending in the direction indicated by the arrow will cause a large disturbance in the diaphragm, resulting in displacement of the support that limits the slenderness ratio of the main material, which cannot significantly reduce the slenderness ratio of the main material. Therefore, adding and reinforcing diaphragms and limiting the outward buckling deformation of diaphragms are the key to improving the integrity of the transmission tower's wind resistance and temporary reinforcement of the transmission tower's wind resistance. Summary of the invention

[0006] The present invention proposes a lightweight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device, which is a flexible, lightweight, high-strength, portable, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device and can be widely used for line capacity expansion and reconstruction or temporary reinforcement of old towers before typhoons land.

[0007] The present invention adopts the following technical solutions.

[0008] A light, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device, the reinforcement device comprising a plurality of transverse connecting rods of adjustable length, the connecting rods being used in pairs for each tower transverse diaphragm, each pair of connecting rods being supported on the transverse diaphragm material pieces on the side of the tower transverse diaphragm to form a cross-shaped reinforcement structure; the connecting rods comprising a plurality of sections of sub-rods connected in sequence, a driving mechanism for adjusting the length of the connecting rods being provided at the mutually connected portions of the sub-rods, the driving mechanism being a manual mechanism or an electric mechanism.

[0009] The four ends of the cross-shaped reinforcement structure are respectively connected to two pairs of cross-partition members facing each other at the cross-partition surface of the iron tower, forming a supporting structure that can prevent the cross-partition members from excessive buckling and deformation.

[0010] When the driving mechanism is an electric mechanism, the electric mechanism is an electric telescopic rod located between two sub-rods.

[0011] The reinforcement device also includes a control module and a monitoring unit; the monitoring unit is a stress sensor arranged at the bent outer edge of the node plate at the intersection of the cross-diaphragm member and the diagonal member of the tower cross-diaphragm. When the driving mechanism is an electric mechanism connected to the control module, the control module collects stress change data at the node through the stress sensor, and controls the telescopic working condition of the electric telescopic rod accordingly.

[0012] The reinforcement device also includes a photovoltaic power generation device, which provides 48V DC power to the control module and the monitoring unit.

[0013] The sub-pole is an extension pole used in power transmission projects, and the extension poles are connected by a rotary connector; the telescopic stroke of the electric telescopic pole is within 500mm.

[0014] The electric telescopic rod uses an industrial-grade DC48V electric reciprocating telescopic rod with a stroke of 500mm, and its load-related specifications are 0.3 to 1.5 tons.

[0015] When the driving mechanism is a manual mechanism, the sub-rod is a tie rod, and the manual mechanism is a turnbuckle located between the tie rod and the node plate of the tower cross diaphragm.

[0016] A method for a light, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device, using the reinforcement device described above, wherein a stress sensor uses a high-precision stress sensor, which is installed on the bent outer edge of the transverse diaphragm node plate where the transverse diaphragm member intersects with two oblique members, to monitor the stress change of the transverse diaphragm after out-of-plane buckling deformation occurs after the force is applied, and a control module receives and analyzes the monitoring data of the stress sensor, and the use method includes:

[0017] Method A: If the monitoring data of the stress sensor indicates that the stress change has a positive increase, it means that the diaphragm has an outward buckling deformation, and the control module outputs a command to the electric telescopic rod, and the effective length of the connecting rod is adjusted by shortening the electric telescopic rod, so as to correct the outward buckling deformation of the diaphragm with tension, thereby ensuring that the diaphragm does not have a large bending deformation;

[0018] Method B: If the monitoring data of the stress sensor shows that the stress change has a negative increase, it means that there is an inward buckling deformation of the cross-partition material. The control module outputs instructions to the electric telescopic rod, and adjusts the effective length of the connecting rod by extending the electric telescopic rod. The inward buckling deformation of the cross-partition material is corrected by thrust, the stress performance of the cross-partition material is adjusted, and the limiting effect of the cross-partition material in the tower on the main material is optimized, so that the overall performance of the transmission tower is not reduced.

[0019] The reinforcement device is used to adjust and limit the intersection of the cross-slope members of the tower when no transverse partition is set at the tower body, so as to reduce the out-of-plane buckling deformation of the diagonal members to improve the bearing performance;

[0020] The installation method of the reinforcement device is: selecting windless and ice-free weather for reinforcement, and the state of the tower at this time is used as the initial reference point of the strain sensor;

[0021] First, sensors, control modules and adjustable-length connecting rods for core monitoring are installed on the ground. The sub-rods in the connecting rods are extension rods used for power transmission projects. The extension rods are connected by rotating connectors. Extension rods of different specifications and numbers are selected to suit the connection sizes of each level of the tower.

[0022] Then, a strain sensor is installed on the bent outer edge of the node plate where the transverse diaphragm and the diagonal material intersect, and a hole is punched on the horizontal node plate in the middle of the transverse diaphragm. At the same time, four lifting fixed pulleys are installed on the inner side of the four intersection points of the cross diagonal materials above the transverse diaphragm of the tower body. The connected sensors, control modules and adjustable length connecting rods for core monitoring are lifted to the transverse diaphragm by the fixed pulleys and put into place. After being put into place, they are connected with the node plate.

[0023] Finally, install the solar cells of the photovoltaic power generation equipment in place, connect the power supply lines, power the control module and sensors, and finally remove the lifting pulley.

[0024] The core technology of the present invention is based on the idea of ​​reducing the deformation of the transverse partition material and strengthening the wind resistance of the transverse partition. A flexible, lightweight, high-strength, portable, detachable and automatically adjustable transmission tower transverse partition reinforcement device is designed and developed. Different from the previous time-consuming and labor-intensive transmission tower reinforcement method that can only be reinforced by increasing the cross-section, the device can be widely used for line capacity expansion and transformation or temporary reinforcement of old towers before a typhoon lands.

[0025] The advantages of the present invention are:

[0026] 1. The present invention limits the deformation of the transverse partition material, thereby maintaining good support for the main material, and can also improve the integrity of the transverse partition, thereby improving the bearing capacity of the transmission tower under wind load.

[0027] 2. The present invention can realize automatic control by monitoring the stress change of the bent outer edge of the node plate where the transverse partition and the diagonal material intersect to control the electric telescopic rod in a closed loop. The length of the device is adjusted by the extension and shortening of the motor telescopic rod to achieve the purpose of limiting the deformation of the transverse partition.

[0028] 3. The present invention can not only reinforce the existing transverse partitions, but also limit the position of the intersection of the cross-diagonal materials when the transverse partitions are not set on the tower body, so as to reduce the out-of-plane buckling deformation of the diagonal materials, improve the bearing capacity of the diagonal materials, and also play a certain reinforcement role.

[0029] 4. The device of the present invention adopts an adjustable connecting device as a flexible component to transmit force, which greatly reduces the weight compared to angle steel reinforcement. It is more convenient to carry, install and disassemble. It only needs a pulley and a brown rope for lifting. The workload of on-site installation and disassembly is small, the labor intensity is low, and quick installation and disassembly can be achieved.

[0030] 5. If it is used for temporary reinforcement in the short term, the core monitoring and control unit and the solar cell module can be omitted. It is only necessary to connect the basket screws between the tie rod and the node plate to achieve the length adjustment function, which is a faster and more efficient temporary reinforcement before a typhoon. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0032] Attached Figure 1 It is a schematic diagram of the local vibration mode of the first 6 vibration modes of the transmission tower;

[0033] Attached Figure 2 It is a schematic diagram of the transverse deformation of the transmission tower under the action of pulsating wind;

[0034] Attached Figure 3is a schematic diagram of the connecting rod of the present invention when it is contracted;

[0035] Attached Figure 4 It is a top view schematic diagram of the present invention;

[0036] Attached Figure 5 This is a schematic diagram after the connecting rod is installed;

[0037] In the figure: 1-connecting rod; 2-control module; 3-photovoltaic power generation equipment; 4-cross partition material; 5-rotating connector; 6-sub-pole; 7-electric telescopic rod. DETAILED DESCRIPTION

[0038] As shown in the figure, a light-weight, high-strength, detachable and automatically adjustable transmission tower transverse partition reinforcement device is provided, the reinforcement device comprises a plurality of transverse connecting rods 1 with adjustable lengths, the connecting rods are used in pairs for each tower transverse partition, each pair of connecting rods is supported on the side transverse partition members 4 of the tower transverse partition to form a cross-shaped reinforcement structure; the connecting rod comprises a plurality of sub-rods 6 connected in sequence, and a driving mechanism for adjusting the length of the connecting rod is provided at the mutually connected parts of the sub-rods, the driving mechanism being a manual mechanism or an electric mechanism.

[0039] The four ends of the cross-shaped reinforcement structure are respectively connected to two pairs of cross-partition members facing each other at the cross-partition surface of the iron tower, forming a supporting structure that can prevent the cross-partition members from excessive buckling and deformation.

[0040] When the driving mechanism is an electric mechanism, the electric mechanism is an electric telescopic rod 7 located between two sub-rods.

[0041] The reinforcement device also includes a control module 2 and a monitoring unit; the monitoring unit is a stress sensor arranged at the bent outer edge of the node plate at the intersection of the cross-diaphragm member and the diagonal member of the tower cross-diaphragm. When the driving mechanism is an electric mechanism connected to the control module, the control module collects stress change data at the node through the stress sensor, and controls the telescopic working condition of the electric telescopic rod accordingly.

[0042] The reinforcement device also includes a photovoltaic power generation device 3, which provides 48V DC power to the control module and the monitoring unit.

[0043] The sub-pole is an extension pole used in power transmission projects, and the extension poles are connected by a rotary connector 5; the telescopic stroke of the electric telescopic pole is within 500 mm.

[0044] In this example, the revolute connector is used to connect the gusset plate and the extension rod, and the extension rods are connected in series.

[0045] The electric telescopic rod uses an industrial-grade DC48V electric reciprocating telescopic rod with a stroke of 500mm, and its load-related specifications are 0.3 to 1.5 tons.

[0046] When the driving mechanism is a manual mechanism, the sub-rod is a tie rod, and the manual mechanism is a turnbuckle located between the tie rod and the node plate of the tower cross diaphragm.

[0047] A method for a light, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device, using the reinforcement device described above, wherein a stress sensor uses a high-precision stress sensor, which is installed on the bent outer edge of the transverse diaphragm node plate where the transverse diaphragm member intersects with two oblique members, to monitor the stress change of the transverse diaphragm after out-of-plane buckling deformation occurs after the force is applied, and a control module receives and analyzes the monitoring data of the stress sensor, and the use method includes:

[0048] Method A: If the monitoring data of the stress sensor indicates that the stress change has a positive increase, it means that the diaphragm has an outward buckling deformation, and the control module outputs a command to the electric telescopic rod, and the effective length of the connecting rod is adjusted by shortening the electric telescopic rod, so as to correct the outward buckling deformation of the diaphragm with tension, thereby ensuring that the diaphragm does not have a large bending deformation;

[0049] Method B: If the monitoring data of the stress sensor shows that the stress change has a negative increase, it means that there is an inward buckling deformation of the cross-partition material. The control module outputs instructions to the electric telescopic rod, and adjusts the effective length of the connecting rod by extending the electric telescopic rod. The inward buckling deformation of the cross-partition material is corrected by thrust, the stress performance of the cross-partition material is adjusted, and the limiting effect of the cross-partition material in the tower on the main material is optimized, so that the overall performance of the transmission tower is not reduced.

[0050] The reinforcement device is used to adjust and limit the intersection of the cross-slope members of the tower when no transverse partition is set at the tower body, so as to reduce the out-of-plane buckling deformation of the diagonal members to improve the bearing performance;

[0051] The installation method of the reinforcement device is: selecting windless and ice-free weather for reinforcement, and the state of the tower at this time is used as the initial reference point of the strain sensor;

[0052] First, sensors, control modules and adjustable-length connecting rods for core monitoring are installed on the ground. The sub-rods in the connecting rods are extension rods used for power transmission projects. The extension rods are connected by rotating connectors. Extension rods of different specifications and numbers are selected to suit the connection sizes of each level of the tower.

[0053] Then, a strain sensor is installed on the bent outer edge of the node plate where the transverse diaphragm and the diagonal material intersect, and a hole is punched on the horizontal node plate in the middle of the transverse diaphragm. At the same time, four lifting fixed pulleys are installed on the inner side of the four intersection points of the cross diagonal materials above the transverse diaphragm of the tower body. The connected sensors, control modules and adjustable length connecting rods for core monitoring are lifted to the transverse diaphragm by the fixed pulleys and put into place. After being put into place, they are connected with the node plate.

[0054] Finally, install the solar cells of the photovoltaic power generation equipment in place, connect the power supply lines, power the control module and sensors, and finally remove the lifting pulley.

[0055] In this example, for the transmission tower structure, the reinforcement device of the present invention is installed and reinforced on each transverse diaphragm, and the device size is designed according to the common tower type in the typical design of the transmission tower. Generally, the straight tower of a line comes from a tower type in the typical design, but with different call heights. The difference lies in the lower part of the tower body and the tower leg structure. Therefore, the specifications of the transverse diaphragm reinforcement device on the upper part of the tower body are consistent, and the size of the transverse diaphragm reinforcement device at the lower part of the tower body and the tower leg can be designed according to the typical tower type.

Claims

1. A lightweight, high-strength, detachable and automatically adjustable transmission tower transverse reinforcement device, characterized in that: The transmission tower transverse diaphragm reinforcement device includes a plurality of transverse connecting rods with adjustable lengths, and also includes a control module and a monitoring unit; the monitoring unit is a stress sensor arranged at the bent outer edge of the node plate at the intersection of the transverse diaphragm member and the diagonal member of the tower transverse diaphragm, and when the driving mechanism is an electric mechanism connected to the control module, the control module collects stress change data at the node through the stress sensor, and controls the telescopic working condition of the electric telescopic rod accordingly; the connecting rods are used in pairs for each tower transverse diaphragm, and each pair of connecting rods is supported at the transverse diaphragm member on the side of the tower transverse diaphragm to form a cross-shaped reinforcement structure; the connecting rod includes a plurality of sub-rods connected in sequence, and a driving mechanism for adjusting the length of the connecting rod is arranged at the mutually connected parts of the sub-rods, and the driving mechanism is an electric mechanism; The electric mechanism is an electric telescopic rod located between two sub-poles; the sub-poles are extension rods used in power transmission projects, and the extension rods are connected by a rotary connector.

2. According to claim 1, a lightweight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device is characterized by: The four ends of the cross-shaped reinforcement structure are respectively connected to two pairs of cross-partition members facing each other at the cross-partition surface of the iron tower, forming a supporting structure that can prevent the cross-partition members from excessive buckling and deformation.

3. According to claim 1, a lightweight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device is characterized by: The transmission tower transverse diaphragm reinforcement device also includes a photovoltaic power generation device, which provides 48V DC power to the control module and the monitoring unit.

4. The light-weight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device according to claim 1 is characterized in that: The telescopic stroke of the electric telescopic rod is within 500 mm.

5. A light-weight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device according to claim 4, characterized in that: The electric telescopic rod uses an industrial-grade DC48V electric reciprocating telescopic rod with a stroke of 500mm, and its load-related specifications are 0.3 to 1.5 tons.

6. A method for using a light, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device, using the transmission tower transverse diaphragm reinforcement device described in claim 1, characterized in that: In the transmission tower diaphragm reinforcement device, the stress sensor uses a high-precision stress sensor, which is installed on the bent outer edge of the diaphragm node plate where the diaphragm member intersects the two diagonal members. It is used to monitor the stress change after the diaphragm member is subjected to out-of-plane buckling deformation. The control module receives and analyzes the monitoring data of the stress sensor. The use method includes: Method A: If the monitoring data of the stress sensor indicates that the stress change has a positive increase, it means that the diaphragm has an outward buckling deformation, and the control module outputs a command to the electric telescopic rod, and the effective length of the connecting rod is adjusted by shortening the electric telescopic rod, so as to correct the outward buckling deformation of the diaphragm with tension, thereby ensuring that the diaphragm does not have a large bending deformation; Method B: If the monitoring data of the stress sensor shows that the stress change has a negative increase, it means that there is an inward buckling deformation of the cross-partition material. The control module outputs instructions to the electric telescopic rod, and adjusts the effective length of the connecting rod by extending the electric telescopic rod. The inward buckling deformation of the cross-partition material is corrected by thrust, the stress performance of the cross-partition material is adjusted, and the limiting effect of the cross-partition material in the tower on the main material is optimized, so that the overall performance of the transmission tower is not reduced.

7. The method for using the light-weight, high-strength, detachable and automatically adjustable transmission tower transverse diaphragm reinforcement device according to claim 6 is characterized in that: Transmission tower transverse diaphragm reinforcement device is used to adjust and limit the intersection of the cross diagonal members of the tower when the transverse diaphragm is not set in the tower body, so that the diagonal members can reduce the out-of-plane buckling deformation to improve the bearing performance; The installation method of the transmission tower transverse reinforcement device is as follows: select windless and ice-free weather for reinforcement, and the tower state at this time is used as the initial reference point of the strain sensor; First, sensors, control modules and adjustable-length connecting rods for core monitoring are installed on the ground. The sub-rods in the connecting rods are extension rods used for power transmission projects. The extension rods are connected by rotating connectors. Extension rods of different specifications and numbers are selected to suit the connection sizes of each level of the tower. Then, a strain sensor is installed on the bent outer edge of the node plate where the transverse diaphragm and the diagonal material intersect, and a hole is punched on the horizontal node plate in the middle of the transverse diaphragm. At the same time, four lifting fixed pulleys are installed on the inner side of the four intersection points of the cross diagonal materials above the transverse diaphragm of the tower body. The connected sensors, control modules and adjustable length connecting rods for core monitoring are lifted to the transverse diaphragm by the lifting fixed pulleys and put into place. After being put into place, they are connected with the node plate. Finally, install the solar cells of the photovoltaic power generation equipment in place, connect the power supply lines, power the control module and sensors, and finally remove the lifting pulley.

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