A device and method for live replacement of composite cross-arm support insulator

Abstract

The present invention relates to the technical field of insulators, and discloses a device and method for live replacement of composite cross-arm support insulators, including tower body fixings, screw jacks, automatic adjustment devices, high-strength insulating struts and connecting fasteners. The present invention reduces the exposure time of operators in high-voltage electric fields and reduces the risk of electric shock and arc injury through automated support and adjustment devices. The device can stably support the cross-arm without power outages, ensuring the continuity and reliability of the transmission line during the replacement of insulators. The automated support and adjustment mechanism reduces the complexity and time consumption of manual operations, and improves the efficiency of replacement operations. The modular design of the device makes each component easy to install, disassemble and maintain, and is convenient for on-site operators to quickly deploy and recover. The device design takes into account different tower body diameters and cross-arm structures, has good adaptability, and can be applied to a variety of transmission tower structures.

Description

Technical Field

[0001] The present invention relates to the technical field of insulators, and in particular to a device and method for live replacement of a composite cross-arm support insulator. Background Art

[0002] Composite materials have the advantages of light weight, high strength, corrosion resistance, good electrical insulation performance, environmental friendliness, and good designability. Composite crossarms utilize the mechanical and insulation properties of composite materials to achieve a high degree of unity between structural materials and functional materials. They have very significant advantages and are increasingly valued by the engineering community in the field of transmission towers. Composite crossarms are affected by environmental factors such as sunlight, rain, dust, and high voltage, and may experience a decrease in insulation performance and no longer meet the requirements for the use of transmission line equipment. There is a need for partial or even complete replacement, but because composite crossarms are different from conventional iron crossarm hanging insulators, previous operation and maintenance experience is not sufficient to guide the replacement of composite crossarms under power. Summary of the invention

[0003] In view of the problems existing in the above-mentioned existing devices and methods for live replacement of composite cross-arm support insulators, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide a device and method for live replacement of composite cross-arm support insulators, which aims to: provide a solution for equipment component replacement, improve the reliability of composite cross-arm equipment in the operation of transmission lines, and promote the popularization and application of composite cross-arms; at the same time, it also enriches the operation methods of live transmission operations and further improves power reliability.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A live replacement device for composite cross-arm support insulators comprises: a tower body fixing member, which is used to fix the device to the tower body of a transmission tower;

[0006] An automatic adjustment device, including a force detection sensor and a control unit, for detecting the load-bearing force on the support rod and providing visual or audible prompts;

[0007] High-strength insulating support rods automatically extend and support the connecting fittings at the ends of the crossarms to bear the lateral pressure exerted by the conductors on the crossarms;

[0008] A screw jack, connected to a high-strength insulating strut, is used to adjust the extension length of the strut;

[0009] Connecting fasteners are designed to be reliably connected to the connecting fittings of the composite crossarm;

[0010] The main body component is used to connect the tower body fixing parts.

[0011] As a preferred solution of the live replacement device for composite cross-arm support insulators of the present invention, the tower body fixing member includes a plurality of fixing structures so as to adapt to tower bodies of different diameters.

[0012] As a preferred solution of the live replacement device for composite cross-arm support insulators of the present invention, the screw jack includes a manual or electric drive mechanism for accurately controlling the extension and retraction of the high-strength insulating support rod.

[0013] As a preferred solution of the live replacement device for composite cross-arm support insulators of the present invention, the automatic adjustment device also includes a microprocessor for processing the signal of the force detection sensor and controlling the on and off of the prompt light.

[0014] As a preferred solution of the live replacement device for composite cross-arm support insulators described in the present invention, the high-strength insulating support rod is made of lightweight and high-strength material to ensure stability and durability when bearing pressure.

[0015] As a preferred solution of the live replacement device for composite cross-arm support insulators of the present invention, the connecting fastener includes a quick locking mechanism for quickly connecting and disconnecting with the connecting fittings of the composite cross-arm.

[0016] As a preferred solution of the live replacement device for the composite cross-arm support insulator of the present invention, the main body component includes a ground wire bracket, and the ground wire bracket includes a hoisting construction hole for installing a U-shaped ring, a lifting device and an insulating rope sleeve.

[0017] As a preferred solution of the live replacement device for the composite cross-arm post insulator of the present invention, the main body component also includes a control rope system, which includes a control rope for tightening the conductor and at least two lifting devices for controlling the position of the conductor when replacing the post insulator.

[0018] As a preferred solution of the live replacement device for the composite cross-arm post insulator described in the present invention, the main body component also includes a lifting system, which includes a heavy pulley, a grinding rope and a motorized winch, which are used for two-point lifting and fixing of the post insulator to be replaced and for lifting after removal.

[0019] In order to solve the above problems, the present invention also provides the following technical solutions: a method for using a composite cross-arm support insulator live replacement device, comprising the composite cross-arm support insulator live replacement device, wherein: a tower body fixing piece is used to fix the device to the tower body;

[0020] Enter the equipotential position through an insulating ladder and connect the fasteners;

[0021] Use ground wire supports and lifting devices to suspend the conductors and remove old post insulators;

[0022] Install new post insulators and reposition conductors;

[0023] The relative position of the conductor connection fittings and the crossarm end is adjusted through the control rope and lifting device to complete the replacement process.

[0024] Beneficial effects of the present invention: Through the automated support and adjustment device, the exposure time of operators in the high-voltage electric field is reduced, and the risk of electric shock and arc injury is reduced. The device can stably support the cross arm without power outage, ensuring the continuity and reliability of the transmission line during the replacement of insulators. The automated support and adjustment mechanism reduces the complexity and time consumption of manual operation and improves the efficiency of replacement operations. The modular design of the device makes it easy to install, disassemble and maintain each component, which is convenient for on-site operators to quickly deploy and recover. The device design takes into account different tower diameters and cross arm structures, has good adaptability, and can be applied to a variety of transmission tower structures. Since the replacement operation can be carried out in a live state, the power outage time of the transmission line caused by replacing insulators is significantly reduced, and the operation efficiency of the power grid is improved. The automated and mechanized operation method reduces the dependence on highly skilled operators and reduces labor costs and training costs. The device can work stably under a variety of severe weather conditions, such as rain, snow, strong winds, etc., ensuring that the maintenance of the transmission line is not restricted by the environment. Through precise force detection and automatic adjustment, the precise alignment of the crossarm and conductor is ensured during the replacement process, improving the accuracy and quality of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the planar structure of the main component of the present invention.

[0028] Figure 3 It is a partial structural diagram of the present invention. Figure 1 .

[0029] Figure 4 It is a partial structural diagram of the present invention. Figure 2 .

[0030] In the figure:

[0031] 100. Tower body fixings; 200. Screw jack; 400. High-strength insulating struts; 500. Connecting fasteners; 600. Main body components; 601. Ground wire bracket; 602. Composite cross arm; 603. Conductor. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0036] Example 1

[0037] Reference Figures 3-4 , which is the first embodiment of the present invention, provides a device and method for live replacement of a composite cross-arm support insulator, the device comprising a tower body fixing part 100, used to fix the device to the tower body of a transmission tower; an automatic adjustment device, comprising a force detection sensor and a control unit, used to detect the bearing capacity of the support rod and provide visual or auditory prompts; a high-strength insulating support rod 400, which automatically extends and supports the connecting hardware at the end of the cross-arm to bear the lateral pressure applied to the cross-arm by the conductor 603; a screw jack 200, connected to the high-strength insulating support rod 400, used to adjust the extension length of the support rod; a connecting fastener 500, designed to be reliably connected to the connecting hardware of the composite cross-arm 602; and a main body component 600, used to connect the tower body fixing part 100.

[0038] Specifically, the tower body fixing part 100 includes a plurality of fixing structures to adapt to tower bodies of different diameters. The screw jack 200 includes a manual or electric driving mechanism for accurately controlling the extension and retraction of the high-strength insulating strut 400. The automatic adjustment device also includes a microprocessor for processing the signal of the force detection sensor and controlling the on and off of the indicator light. The high-strength insulating strut 400 is made of a lightweight and high-strength material to ensure stability and durability when bearing pressure. The connecting fastener 500 includes a quick locking mechanism for quickly connecting and disconnecting with the connecting hardware of the composite crossarm 602.

[0039] The tower body fixture 100 includes a plurality of fixing structures, which are designed to adapt to tower bodies of different diameters. The advantage of this design is that it provides the versatility and adaptability of the device, so that the same set of equipment can be applied to transmission towers of different specifications, without the need to customize different fixtures for each tower body diameter, thereby reducing costs and inventory complexity.

[0040] The automatic adjustment device includes a force detection sensor and a control unit, which are used to detect the bearing force of the high-strength insulating support rod 400 and provide visual or auditory prompts. The advantage of this automatic adjustment mechanism is that it can ensure that the support rod correctly bears the lateral pressure applied to the cross arm by the wire 603, and confirm to the operator whether the support is in place through a prompt light or sound signal, thereby improving the accuracy and safety of the operation.

[0041] The high-strength insulating support rod 400 automatically extends and supports the crossarm end connection fittings to bear the lateral pressure applied to the crossarm by the conductor 603. The support rod is made of lightweight high-strength material to ensure stability and durability when bearing pressure. The benefit of this material selection is that it provides the required mechanical strength while maintaining the lightness of the assembly for easy operation and maintenance.

[0042] The screw jack 200 is connected to the high-strength insulating support rod 400 and includes a manual or electric drive mechanism for precisely controlling the extension and retraction of the support rod. The advantage of this design is that it provides precise control of the support rod position, ensuring the stability and reliability of the device, while the electric mechanism can also improve the efficiency of the operation.

[0043] The connection fastener 500 is used to reliably connect with the connection fittings of the composite cross arm 602, and includes a quick locking mechanism for quickly connecting and disconnecting with the connection fittings of the composite cross arm 602. The advantage of this quick locking mechanism is that it simplifies the operation process, reduces the operation time, and improves the operation efficiency.

[0044] When in use, the device consists of five parts: a tower body fixing 100, a screw jack 200, an automatic adjustment device, a high-strength insulating support rod 400 and a connecting fastener 500. The method of using the device is as follows: when in use, the device is installed on the tower body. After receiving the command, the internal mechanism automatically extends the support rod until it supports the cross-section end connection hardware and fully bears the lateral pressure applied to the cross arm by the wire 603. At this time, the automatic adjustment device inside the device detects that the bearing capacity is greater than the preset value, and the top prompt light is on, indicating that the support has been completed. The operator enters the equipotential position of the high-voltage end of the composite cross arm 602 by overlapping the insulating ladder, and reliably connects the connecting fastener 500 with the composite cross arm 602 connecting hardware. At this time, the force applied by the wire 603 on the support insulator is transferred to the device of the present invention. The support insulator is not subjected to the pressure of the wire 603 and is ready for replacement.

[0045] Example 2

[0046] Reference Figures 1 to 3 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the main body component 600 includes a ground wire bracket 601, and the ground wire bracket 601 includes a lifting construction hole for installing a U-shaped ring, a lifting device and an insulating rope loop.

[0047] Furthermore, the main body part 600 also includes a control rope system, which includes a control rope lifting device for tightening the conductor 603. The lifting device is not insulated and is safer than a hand winch directly contacting the conductor 603. It is used to control the position of the conductor 603 when replacing the support insulator.

[0048] Furthermore, the main body component 600 also includes a lifting system, which includes a heavy pulley, a grinding rope and a motorized capstan, and is used for two-point lifting and fixing of the post insulator that needs to be replaced, as well as lifting after removal.

[0049] In summary, by overlapping the insulating ladder, the operator enters the equipotential position of the high-voltage end of the composite crossarm 602 and arranges the various connection points for replacement. Use the ground wire bracket 601 to hang the conductor 603. The ground wire bracket 601 has a hoisting construction hole A, one in front and behind the crossarm. At the front and rear hoisting construction holes A, respectively, a U-shaped ring, a lifting device, and an insulating rope sleeve that meet the load requirements are used to connect the conductor 603 to the hardware D; a control rope is set on the tower body at the same horizontal position of the conductor 603 to tighten the conductor 603; after tightening the front and rear lifting devices at the same time, remove the connection between the conductor 603 connection hardware and the composite crossarm 602, and slowly loosen the control rope to keep the conductor 603 away from the composite crossarm 602. Select a main material node B on the ground wire bracket 601, and use the lifting device and wire rope sleeve to connect this node to the high-voltage end F of the composite crossarm 602 and tighten it to ensure that the remaining three insulators can still remain stable after removing a single pillar insulator. Find a main material node C on the side of the ground wire support 601 close to the tower body, and use it as a lifting point to hang a lifting pulley. The lifting system consists of a lifting pulley, a grinding rope, and a motorized capstan. Use a two-point lifting method to fix the post insulator that needs to be replaced at points CE and CF, tighten the lifting device, and then remove the post insulator that needs to be replaced. When removing the post insulator, pay attention to observe before it collides with the tower, use the control rope to pull it apart, and then slowly loosen the capstan, put the insulator on the ground, and move it away. The lifting process of the post insulator is the opposite of the removal process. After the replaced post insulator is installed, the wire 603 needs to be reset, and the wire 603 and the connecting hardware D need to be pulled to the end of the crossarm with the control rope 4. By fine-tuning the two lifting devices that lift the wire 603, adjust the relative position of the wire 603 connecting hardware D and the end of the crossarm, and reconnect the wire 603 connecting hardware to the composite crossarm 602.

[0050] Example 3

[0051] Reference Figures 1 to 4, which is the third embodiment of the present invention, after the composite cross arm 602 is supported by the above device, the conductor 603 is suspended by the ground wire support 601, and the ground wire support 601 is provided with a hoisting construction hole. The conductor 603 is connected to the hardware by using a U-shaped ring, a lifting device, and an insulating rope sleeve at the front and rear two hoisting construction holes; a control rope is set on the tower body at the same horizontal position of the conductor 603 to tighten the conductor 603; after tightening the front and rear two lifting devices at the same time, the connection between the conductor 603 connection hardware and the composite cross arm 602 is removed, and the control rope is slowly loosened to keep the conductor 603 away from the composite cross arm 602. After that, the connection between the device connection fastener 500 and the composite cross arm 602 connection hardware is released, and the adjustment device is retracted to retract the support rod and remove the installation. A main material node is selected on the ground wire support 601, and this node is connected and tightened with the high-voltage end of the composite cross arm 602 by using a lifting device and a wire rope sleeve to ensure that the remaining three insulators can still remain stable after the removal of a single support insulator. Find a main material node near the tower body of the ground wire support 601 and hang a lifting pulley as a lifting point. The lifting system consists of a lifting pulley, a grinding rope, and a motorized capstan. Fix the pillar insulator that needs to be replaced by a two-point lifting method, tighten the lifting device and remove the pillar insulator that needs to be replaced. When removing the pillar insulator, pay attention to observe whether it collides with the iron tower, use the control rope to pull it apart, then slowly loosen the capstan, put the insulator on the ground and move it away. The lifting process of the pillar insulator is the opposite of the removal process. After the replaced pillar insulator is installed, the wire 603 needs to be reset, and the wire 603 and the connecting hardware need to be pulled to the end of the crossarm with the control rope. By fine-tuning the two lifting devices for lifting the wire 603, adjust the relative position of the connecting hardware of the wire 603 and the end of the crossarm, and reconnect the connecting hardware of the wire 603 to the composite crossarm 602.

[0052] By utilizing the principle of charge transfer, the operator is connected to the charged object so that the charge on the surface of the charged object is transferred to the operator. Both are at the same voltage level, thus achieving equipotential operation.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A live replacement device for composite cross-arm support insulators, characterized in that: include, A tower body fixing member (100) is used to fix the device to the tower body of the transmission tower; An automatic adjustment device, including a force detection sensor and a control unit, for detecting the load-bearing force on the support rod and providing visual or audible prompts; A high-strength insulating support rod (400) automatically extends and supports the connecting fittings at the ends of the crossarms to bear the lateral pressure applied by the conductors (603) to the crossarms; A screw jack (200) is connected to the high-strength insulating support rod (400) and is used to adjust the extension length of the support rod; The connecting fastener (500) is designed to be reliably connected to the connecting fitting of the composite cross arm (602); The main body component (600) is used to connect the tower body fixing component (100).

2. The live replacement device for composite cross-arm support insulator according to claim 1 is characterized in that: The tower body fixing member (100) comprises a plurality of fixing structures so as to adapt to tower bodies with different diameters.

3. The live replacement device for composite cross-arm support insulator according to claim 2 is characterized in that: The screw jack (200) includes a manual or electric drive mechanism for precisely controlling the extension and retraction of the high-strength insulating support rod (400).

4. The live replacement device for composite cross-arm support insulator according to claim 3 is characterized in that: The automatic adjustment device also includes a microprocessor for processing the signal of the force detection sensor and controlling the on and off of the prompt light.

5. The live replacement device for composite cross-arm support insulator according to any one of claims 1 to 4, characterized in that: The high-strength insulating support rod (400) is made of a lightweight high-strength material to ensure stability and durability when bearing pressure.

6. The live replacement device for composite cross-arm support insulator according to claim 5 is characterized in that: The connecting fastener (500) includes a quick locking mechanism for quickly connecting and disconnecting with the connecting fitting of the composite crossarm (602).

7. The live replacement device for composite cross-arm support insulator according to claim 6 is characterized in that: The main body component (600) comprises a ground wire support (601), and the ground wire support (601) comprises a hoisting construction hole for installing a U-shaped ring, a lifting device and an insulating rope loop.

8. The live replacement device for composite cross-arm support insulator according to claim 7 is characterized in that: The main body part (600) also includes a control rope system, which includes a control rope for tightening the conductor (603) and at least two lifting devices for controlling the position of the conductor (603) when replacing the post insulator.

9. The live replacement device for composite cross-arm support insulator according to claim 8 is characterized in that: The main body component (600) also includes a lifting system, which includes a heavy pulley, a grinding rope and a motorized winch, and is used for two-point lifting and fixing of the post insulator that needs to be replaced, and for lifting after removal.

10. A method for using a live replacement device for a composite cross-arm support insulator, characterized in that: The live replacement device for composite cross-arm post insulator according to any one of claims 1 to 9 comprises: Fix the device to the tower body with the tower body fixing piece; Enter the equipotential position through an insulating ladder and connect the fasteners; Use ground wire supports and lifting devices to suspend the conductors and remove old post insulators; Install new post insulators and reposition conductors; The replacement process is completed by adjusting the relative position of the conductor connection fittings and the crossarm end through the control rope and lifting device.

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