Auxiliary replacement device and method for suspension double insulator strings

Abstract

The invention relates to the technical field of auxiliary replacement of double suspension insulator strings, and provides an auxiliary replacement device and method for double suspension insulator strings, which simplify the auxiliary replacement process of the double suspension insulator strings. According to the device, the horizontal state of the two connecting plates can be kept during replacement operation, and stable supporting of the two connecting plates is achieved through the structural design that a bearing plate and a positioning pin are introduced into the device; pulling force is applied through the hoist, and the pulling force borne by the two insulators is transferred to the hoist; and the hoist is positioned on the central line, so that the problem of non-uniform stress caused by a load-carrying phenomenon is avoided, and the situation that a cross arm hanging point bolt with an unfastened end cannot be smoothly disassembled due to the fact that the two connecting plates tilt up, so that an insulator chain with an unfastened end is unbalanced in stress and an insulator chain on the other side inclines downwards due to the influence of gravity is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of auxiliary replacement of a suspended double insulator string, and in particular to an auxiliary replacement device and method for a suspended double insulator string. Background Art

[0002] During the maintenance and inspection of power transmission lines, especially for transmission lines with voltage levels of 35kV and above, in order to avoid the risk of leakage, short circuit or arc discharge due to insulation degradation or physical damage of insulator strings, and then electrical accidents, it is necessary to regularly replace damaged insulator strings to reduce safety hazards. Suspension insulator strings usually adopt a single-hung double-joint structure, which is widely used in key crossing sections, such as across highways, railways and navigable rivers.

[0003] In the prior art, the replacement method of the suspended double insulator string has several technical difficulties and safety hazards, especially in high voltage levels and complex environments. These problems are mainly manifested in the following aspects:

[0004] Unbalanced load: During the replacement process, when the connection point of the insulator string on one side is untied, the "lifting load" phenomenon often occurs, causing the second connecting plate to tilt due to uneven force. The "lifting load" phenomenon causes the untied end of the insulator string to be unbalanced, and the insulator string on the other side tilts downward due to the influence of gravity, making it impossible to smoothly remove the crossarm hanging point bolts at the untied end, seriously affecting construction efficiency and safety.

[0005] Low operating efficiency: Due to unbalanced loads, operators have to use additional supporting equipment to stabilize the second slab, which not only increases the complexity of the operation but also increases the construction time. In addition, the physical exertion of operators increases, and long-term and high-intensity operations are prone to fatigue and accidents.

[0006] Current auxiliary tools generally lack an effective force balance design when replacing a suspension double insulator string, and are unable to cope with construction difficulties caused by imbalance during the replacement of a suspension insulator string.

[0007] Based on this, the present invention proposes an auxiliary replacement device and method for a suspended double insulator string, so as to effectively balance the load, reduce the difficulty of operation and improve safety when replacing the suspended double insulator string. Summary of the invention

[0008] The purpose of the present invention is to solve the deficiencies of the prior art and to provide an auxiliary replacement device and method for a suspended double insulator string, so as to effectively balance the load, reduce the difficulty of operation and improve safety when replacing the suspended double insulator string.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An auxiliary replacement device for a suspended double insulator string comprises: a load-bearing plate detachably connected to the bottom center position of a second connecting plate, and a hoist detachably connected to the load-bearing plate; a fixing hook is provided on the outer shell of the hoist, the fixing hook is detachably connected to the load-bearing plate, and the lifting hook of the hoist is detachably connected to the fixed wire at the end of the insulator.

[0011] Preferably, the load-bearing plate is a rectangular block, and is provided with a U-shaped groove, the width of which is slightly greater than the thickness of the second connecting plate; a plurality of positioning holes symmetrically arranged along the center of the load-bearing plate are provided on the outer wall corresponding to the U-shaped groove of the load-bearing plate, and the spacing between the positioning holes is the same as the spacing between the construction holes of the second connecting plate;

[0012] A connecting column is provided at the bottom of the load-bearing plate, and a lifting ring is sleeved on the connecting column. The lifting ring is detachably connected to the fixing hook.

[0013] Preferably, a positioning pin is sleeved in the positioning hole of the load-bearing plate.

[0014] Preferably, one end of the positioning pin is designed in a circular pancake shape; the other end of the positioning pin is rotatably connected to a movable clamping strip, a connecting hole is opened at the center of the movable clamping strip, the connecting hole is sleeved with a connecting shaft, and the connecting shaft is fixedly connected to the positioning pin.

[0015] Preferably, a receiving groove is provided at one end of the positioning pin away from the circle, a positioning pin is fixedly connected in the receiving groove, the positioning pin is rotatably connected to the movable clamping bar, and the weight difference between the two ends of the movable clamping bar is at least twice.

[0016] Preferably, a centering device is provided between the hoisting hook of the hoist and the fixed conductor at the end of the insulator.

[0017] Preferably, the centering device comprises: a connecting seat, a lifting lug fixedly connected to the top of the connecting seat, a walking pulley rotatably connected to the connecting seat, a positioning pulley coaxially fixedly connected to the walking pulley, a driven pulley arranged below the same plane as the positioning pulley, and a measuring tape with a ruler body placed between the positioning pulley and the driven pulley;

[0018] A bending portion is provided at the bottom of the connecting seat, and the bending portion is detachably connected to the conducting wire; the bottom of the connecting seat is a U-shaped structure, the walking pulley is rotatably connected in the U-shaped structure, the positioning pulley is provided on one side of the connecting seat, and the bending portion is provided on the other side of the connecting seat, and the circumference of the walking pulley is twice that of the positioning pulley; the lifting ear is detachably connected to the lifting hook of the hoist; the tape measure tooth hook is aligned with the left side of the connecting seat.

[0019] Preferably, a clamping seat is provided on the outside of the connecting seat, and the clamping seat is detachably connected to the tape measure. The clamping seat includes a support plate and a clamping plate. The support plate is fixedly connected to the connecting seat, and the clamping plate is slidably connected to the support plate. A screw rod is provided between the clamping plate and the connecting seat, and a handle is provided at the end of the screw rod.

[0020] Another object of the present invention is to provide a method for auxiliary replacement of a suspension double insulator string using the above-mentioned auxiliary replacement device for a suspension double insulator string, comprising the following steps:

[0021] S1. Install the load-bearing plate. Align the U-shaped groove of the load-bearing plate with the second connecting plate, and gently insert the second connecting plate so that the positioning hole is coaxial with the construction hole. Insert the positioning pins into the positioning holes at both ends of the load-bearing plate, adjust the movable card strip to a vertical state, and lock the positioning pins to fix the load-bearing plate;

[0022] S2. Connect the lifting device, connect the lifting ring with the hoisting hook, connect the hoisting hook with the fixed wire at the end of the insulator, and fix the hoisting hook in the middle of the two insulators;

[0023] S3, apply tension, apply tension through the hoist, and transfer the tension borne by the two insulators to the hoist;

[0024] S4. Replace the suspended double insulator string and untie the hanging point of the target insulator string. At this time, the second connecting plate remains horizontal and will not tilt, which is convenient for operators to safely disassemble and replace the insulator string;

[0025] S5. Remove the load-bearing plate and connect the lifting equipment.

[0026] Another object of the present invention is to provide a method for auxiliary replacement of a suspension double insulator string using the above-mentioned auxiliary replacement device for a suspension double insulator string, comprising the following steps:

[0027] S1. Install the load-bearing plate. Align the U-shaped groove of the load-bearing plate with the second connecting plate, and gently insert the second connecting plate so that the positioning hole is coaxial with the construction hole. Insert the positioning pins into the positioning holes at both ends of the load-bearing plate, adjust the movable card strip to a vertical state, and lock the positioning pins to fix the load-bearing plate;

[0028] S2. Connect the lifting device and perform centering. Connect the lifting ring to the fixed hook of the hoisting hoist, and connect the lifting hook of the hoisting hoist to the lifting lug of the centering device.

[0029] Place the connection seat close to the right side of the connection point between the left insulator and the conductor, and ensure that the tape measure hook is aligned with the left side of the connection seat. At this time, control the positioning pulley to engage with the conductor. After the positioning pulley engages with the conductor, press down the connection seat and move the connection seat along the conductor until the connection seat is close to the left side of the connection point between the right insulator and the conductor.

[0030] At this time, place the bent part under the conductor, and use the position of the tape measure hook as a reference, that is, move the connection seat so that the tape measure hook is close to the right side of the connection point between the left insulator and the conductor, and clamp the bent part with the conductor;

[0031] S3, apply tension, apply tension through the hoist, and transfer the tension borne by the two insulators to the hoist;

[0032] S4. Replace the suspended double insulator string and untie the hanging point of the target insulator string. At this time, the second connecting plate remains horizontal and will not tilt, which is convenient for operators to safely disassemble and replace the insulator string;

[0033] S5. Remove the load-bearing plate, connecting slings and centering device.

[0034] The present invention discloses a device and method for auxiliary replacement of a suspended double insulator string, which have the following beneficial effects.

[0035] The present invention simplifies the auxiliary replacement process of the suspended double insulator string, and effectively simplifies the replacement process of the suspended double insulator string through the cooperation of the load-bearing plate and the hoist. During the replacement, the operator can operate more easily and safely, and the work efficiency is improved. The operator can complete the replacement of the insulator string more quickly, shorten the downtime, and reduce the maintenance cost.

[0036] The safety of operation is improved. The present invention can keep the second connecting plate in a horizontal state during the replacement operation, and realizes stable support for the second connecting plate by introducing the structural design of the load-bearing plate and the positioning pin in the device; the pulling force is applied by the hoist to transfer the pulling force of the two insulators to the hoist; and the hoist is located on the center line to avoid the uneven force problem caused by the "carrying the load" phenomenon, and avoid the unbalanced force on the insulator string at the untied end due to the tilting of the second connecting plate, and the insulator string on the other side tilts downward due to the influence of gravity, resulting in the inability to smoothly remove the cross arm hanging point bolts at the untied end; the present invention is easy to carry and install, reduces the physical demand and the risk of high-altitude operation during operation, thereby improving the safety of construction and the convenience of operation.

[0037] Accurate positioning and force application: through the design of the centering device, the force point of the hoist hook can be quickly positioned in the middle of the fixed wires at the ends of the two insulators, so that the applied pulling force is more uniform and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic structural diagram of the auxiliary replacement device for a suspended double insulator string of the present invention.

[0039] Figure 2 It is a partial structural schematic diagram of the present invention.

[0040] Figure 3 It is a partial structural schematic diagram of the present invention.

[0041] Figure 4 It is a partial structural schematic diagram of the present invention.

[0042] Figure 5 It is another structural schematic diagram of the auxiliary replacement device for a suspended double insulator string of the present invention.

[0043] Figure 6 It is a partial structural schematic diagram of the present invention.

[0044] Figure 7 It is a partial structural schematic diagram of the present invention.

[0045] Figure 8 for Figure 5 A local enlarged schematic diagram of point A in the middle.

[0046] Fig. 9 for Figure 8 Another state diagram.

[0047] Fig.10 for Figure 8 Another status diagram.

[0048] Fig.11 for Figure 8 Another status diagram.

[0049] In the attached drawings: 1-locating pin; 2-load-bearing plate; 3-lifting ring; 4-movable clamping strip; 5-connecting shaft; 6-connecting column; 7-centering device; 71-connecting seat; 72-lifting ear; 73-travel pulley; 74-positioning pulley; 75-driven pulley; 76-clamping seat; 761-support plate; 762-clamping plate; 763-screw rod; 764-handle; 77-bending part; 8-tape measure; 81-tooth hook; 82-brake block; 9-second connecting plate; 10-insulator string; 11-hoisting hoist; 111-fixed hook; 112-lifting chain; 113-lifting hook; 12-conductor wire. DETAILED DESCRIPTION

[0050] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0051] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0052] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0053] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0054] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0055] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] Example 1

[0057] Please refer to Figures 1 to 4 , an auxiliary replacement device for a suspended double insulator string, comprising: a load-bearing plate 2 detachably connected to the bottom center of a second connecting plate 9, and a hoist 11 detachably connected to the load-bearing plate 2; a fixing hook 111 is provided on the outer shell of the hoist 11, the fixing hook 111 is detachably connected to the load-bearing plate 2, and a lifting hook 113 of the hoist 11 is detachably connected to a fixed conductor 12 at the end of the insulator. The combined design of the load-bearing plate 2 and the hoist 11 is adopted, and the fixing hook 111 and the lifting ring 3 are detachably connected to ensure that the insulator and other components can be safely and firmly suspended during the replacement process, thereby reducing the safety hazards of the operator during the replacement process. The lifting hook 113 is fixedly connected to the lifting chain 112.

[0058] The pulling force is applied by the hoist 11 to transfer the pulling force borne by the two insulators to the hoist 11; the hoist 11 is located on the center line, avoiding the uneven force problem caused by the "carrying the load" phenomenon, and avoiding the unbalanced force on the insulator string 10 at the untied end due to the tilting of the second connecting plate 9, and the insulator string 10 on the other side tilting downward due to the influence of gravity, resulting in the inability to smoothly remove the cross arm hanging point bolts at the untied end; the present invention is easy to carry and install, reduces the physical strength requirements and the risk of high-altitude operation during operation, thereby improving the safety of construction and the convenience of operation.

[0059] The load-bearing plate 2 is a rectangular block, and is provided with a U-shaped groove, the width of which is slightly larger than the thickness of the second connecting plate 9; the outer wall corresponding to the U-shaped groove of the load-bearing plate 2 is provided with a plurality of positioning holes symmetrically arranged along the center of the load-bearing plate 2, and the spacing between the positioning holes is the same as the spacing between the construction holes of the second connecting plate 9; the bottom of the load-bearing plate 2 is provided with a connecting column 6, and the connecting column 6 is provided with a lifting ring 3, and the lifting ring 3 is detachably connected to the fixing hook 111. The U-shaped groove and the positioning hole design provided on the load-bearing plate 2 enable the load-bearing plate 2 to provide better fit and stability when connected with the second connecting plate 9.

[0060] A positioning pin 1 is sleeved in the positioning hole of the load-bearing plate 2 .

[0061] One end of the positioning pin 1 is designed in a round pancake shape; one end of the positioning pin 1 is designed in a round pancake shape, which is convenient for operation and gripping; the other end of the positioning pin 1 is rotatably connected with an active clamping strip 4, and a connecting hole is opened at the center of the active clamping strip 4, and the connecting hole is sleeved with a connecting shaft 5, and the connecting shaft 5 is fixedly connected to the positioning pin 1. The active clamping strip 4 provides a flexible locking and unlocking function. The active clamping strip 4 can be adjusted by 90 degrees and has two states: the design of setting the positioning pin 1 and the active clamping strip 4 allows the operator to quickly and conveniently complete the loading and unloading of the load-bearing plate 2.

[0062] Locked state: when the movable clamping strip 4 is in a vertical state relative to the positioning pin 1, the positioning pin 1 is locked in the hole on the load-bearing plate 2, ensuring the stability of the entire device during use.

[0063] Unlocked state: When the movable card strip 4 is in a horizontal state relative to the positioning pin 1, the positioning pin 1 is in an open state, which is convenient for operators to quickly load and unload the load-bearing plate 2 onto the second connecting plate 9, simplifying the operation steps. The 90-degree adjustment design of the movable card strip 4 provides the flexibility of locking and unlocking, allowing operators to quickly switch the operating state according to actual needs, effectively improving work efficiency.

[0064] A receiving groove is provided at the end of the locating pin 1 away from the circle, and the locating pin 1 is fixedly connected in the receiving groove. The locating pin 1 is rotatably connected to the movable clip 4. The weight difference between the two ends of the movable clip 4 is at least twice. The weight difference between the two ends of the movable clip 4 is at least twice, which can ensure that the movable clip 4 is always in a locked state when there is no human interference.

[0065] Example 2

[0066] Please refer to Figures 5 to 11 Based on Example 1, in this embodiment, a centering device 7 is provided between the lifting hook 113 of the hoist 11 and the fixed conductor 12 at the end of the insulator.

[0067] The centering device 7 includes: a connecting seat 71, a lifting ear 72 fixedly connected to the top of the connecting seat 71, a walking pulley 73 rotatably connected to the connecting seat 71, a positioning pulley 74 coaxially fixedly connected to the walking pulley 73, a driven pulley 75 arranged below the same plane as the positioning pulley 74, and a measuring tape 8 with a ruler body placed between the positioning pulley 74 and the driven pulley 75; the fixing of the measuring tape 8 can be controlled by its own brake block 82, which is easy to use.

[0068] The bottom of the connection seat 71 is provided with a bending portion 77, and the bending portion 77 is detachably connected to the conductor 12; the bottom of the connection seat 71 is a U-shaped structure, the walking pulley 73 is rotatably connected in the U-shaped structure, the positioning pulley 74 is arranged on one side of the connection seat 71, and the bending portion 77 is arranged on the other side of the connection seat 71, and the circumference of the walking pulley 73 is twice that of the positioning pulley 74. It should be understood that the circumference of the walking pulley 73 is twice that of the positioning pulley 74, which means that the circumference of the contact position between the walking pulley 73 and the conductor 12 is twice that of the positioning pulley 74; the lifting lug 72 is detachably connected to the lifting hook 113 of the hoisting hoist 11; the tooth hook 81 of the measuring tape 8 is aligned with the left side of the connection seat 71. Using the measuring tape 8 as an indicating device, it is only necessary to roll the walking pulley 73 from beginning to end along the fixed conductors 12 at the ends of the two insulators, and the extended length of the measuring tape 8 is half of the fixed conductors 12 at the ends of the two insulators. Then, based on this, the midpoint of the fixed conductors 12 at the ends of the two insulators can be quickly found.

[0069] The centering device 7 enables accurate positioning between the lifting hook 113 of the hoisting hoist 11 and the fixed wires 12 at the ends of the insulators. Specifically, the force point of the lifting hook 113 of the hoisting hoist 11 is quickly positioned between the fixed wires 12 at the ends of the two insulators.

[0070] A clamping seat 76 is provided on the outside of the connecting seat 71, and the clamping seat 76 is detachably connected to the measuring tape 8. The clamping seat 76 includes a supporting plate 761 and a clamping plate 762. The supporting plate 761 is fixedly connected to the connecting seat 71, and the clamping plate 762 is slidably connected to the supporting plate 761. A screw rod 763 is provided between the clamping plate 762 and the connecting seat 71, and a handle 764 is provided at the end of the screw rod 763.

[0071] Example 3

[0072] Please refer to Figures 1 to 4 Based on Example 1, in this embodiment, a method for auxiliary replacement of a suspension double insulator string is provided, comprising the following steps:

[0073] S1. Install the load-bearing plate 2. Align the U-shaped groove of the load-bearing plate 2 with the second connecting plate 9, and gently insert the second connecting plate 9 so that the positioning hole is coaxial with the construction hole. Insert the positioning pin 1 into the positioning holes at both ends of the load-bearing plate 2, adjust the movable card strip 4 to a vertical state, and lock the positioning pin 1 to fix the load-bearing plate 2;

[0074] S2, connect the lifting device, connect the lifting ring 3 with the fixed hook 111 of the hoisting hoist 11, connect the lifting hook 113 of the hoisting hoist 11 with the fixed wire 12 at the end of the insulator, and fix the lifting hook 113 of the hoisting hoist 11 in the middle of the two insulators;

[0075] S3, applying tension, applying tension through the hoist 11, transferring the tension borne by the two insulators to the hoist 11;

[0076] S4, replace the suspended double insulator string 10, untie the hanging point of the target insulator string 10, at this time the second connecting plate 9 remains horizontal and will not tilt, which is convenient for operators to safely disassemble and replace the insulator string 10;

[0077] S5. Remove the load-bearing plate 2 and connect the lifting device.

[0078] The U-shaped groove design of the load-bearing plate 2 and the use of the positioning pin 1 ensure the stability of the load-bearing plate 2 when connected to the second connecting plate 9. It can effectively prevent the safety hazards caused by tilting during the replacement process; through the step of applying tension, the hoist 11 transfers the load-bearing tension of the insulator to the hoist 11, reducing the risk of operators when disassembling the insulator string 10; the replacement method provided in this embodiment can achieve efficient replacement: when untying the hanging point of the target insulator string 10, the second connecting plate 9 is kept in a horizontal state, so that the operator can more safely and conveniently disassemble and replace the insulator string 10, significantly improving the efficiency and safety of replacement.

[0079] Reducing labor costs: In the method, the pulling force is applied by the hoist 11, which reduces the labor intensity of the operators and improves the accuracy of replacement.

[0080] Strong applicability: This method is applicable to the replacement of various types of suspended double insulator strings 10, has good versatility, and can meet the maintenance requirements of different power facilities.

[0081] Example 4

[0082] Please refer to Figures 5 to 11 Based on Example 2, in this embodiment, a method for auxiliary replacement of a suspended double insulator string is provided, comprising the following steps:

[0083] S1. Install the load-bearing plate 2. Align the U-shaped groove of the load-bearing plate 2 with the second connecting plate 9, and gently insert the second connecting plate 9 so that the positioning hole is coaxial with the construction hole. Insert the positioning pin 1 into the positioning holes at both ends of the load-bearing plate 2, adjust the movable card strip 4 to a vertical state, and lock the positioning pin 1 to fix the load-bearing plate 2;

[0084] S2, connect the lifting device and find the center, connect the lifting ring 3 with the fixed hook 111 of the hoisting hoist 11, and connect the lifting hook 113 of the hoisting hoist 11 with the lifting ear 72 of the centering device 7, as shown in FIG. Fig. 9 As shown, place the connection seat 71 close to the right side of the connection point between the left insulator and the conductor 12, and ensure that the tooth hook 81 of the tape measure 8 is aligned with the left side of the connection seat 71;

[0085] like Fig.10 As shown, at this time, the positioning pulley 74 is controlled to engage with the conductor 12, and after the positioning pulley 74 engages with the conductor 12, the connection seat 71 is pressed down, and the connection seat 71 is moved along the conductor 12 until the connection seat 71 is close to the left side of the connection point between the right insulator and the conductor 12;

[0086] like Fig.11 As shown, at this time, the bent portion 77 is placed under the conductor 12, and the position of the tooth hook 81 of the tape measure 8 is used as a reference, that is, the connecting seat 71 is moved so that the tooth hook 81 of the tape measure 8 is close to the right side of the connection point between the left insulator and the conductor 12, and the bent portion 77 is clamped with the conductor 12;

[0087] S3, applying tension, applying tension through the hoist 11, transferring the tension borne by the two insulators to the hoist 11;

[0088] S4, replace the suspended double insulator string 10, untie the hanging point of the target insulator string 10, at this time the second connecting plate 9 remains horizontal and will not tilt, which is convenient for operators to safely disassemble and replace the insulator string 10;

[0089] S5, dismantle the load-bearing plate 2, connect the lifting device and the centering device 7.

[0090] Enhanced positioning accuracy: By introducing the centering device 7, the present embodiment improves the positioning accuracy, and quickly locates the force point of the hoist hook 113 of the hoisting hoist 11 to the middle of the fixed wires 12 at the ends of the two insulators; the hoisting hoist 11 applies a tensile force to transfer the tensile force of the two insulators to the hoisting hoist 11; and the hoisting hoist 11 is located on the center line, avoiding the problem of uneven force caused by the "carrying load" phenomenon, and avoiding the unbalanced force of the insulator string 10 at the untied end due to the tilting of the second connecting plate 9, and the insulator string 10 on the other side tilts downward due to the influence of gravity, resulting in the inability to smoothly remove the cross arm hanging point bolts at the untied end;

[0091] Reduce safety risks: In the step of applying the pulling force, the load-bearing pulling force of the insulator is effectively transferred through the hoist 11, reducing the risk of the operator directly contacting the heavy object. At the same time, keeping the second connecting plate 9 in a horizontal state effectively prevents the safety hazard caused by tilting during the replacement process.

[0092] Strengthening structural stability: The U-shaped groove and the locking design of the positioning pin 1 ensure the stability of the load-bearing plate 2, avoiding looseness or tilting during the replacement process, thereby ensuring the safety and smooth progress of the entire replacement operation.

[0093] Enhanced equipment applicability: The method design of this embodiment is suitable for the maintenance needs of various power facility equipment, and has strong versatility and adaptability, making it suitable for use in different environments and conditions.

[0094] Reducing manpower input: Through the use of mechanized tension application and centering device 7, the dependence on manpower is reduced, the labor intensity of operators is reduced, and the safety and efficiency of operations are improved.

[0095] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be a substitution of a part of the structure, device, method step, or a complete technical solution. The equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A suspension double insulator string auxiliary replacement device, characterized in that: include: A load-bearing plate detachably connected to the center position of the bottom of the second connecting plate, and a hoist detachably connected to the load-bearing plate; a fixing hook is provided on the outer shell of the hoist, the fixing hook is detachably connected to the load-bearing plate, and the lifting hook of the hoist is detachably connected to the fixed wire at the end of the insulator.

2. The auxiliary replacement device for a suspension double insulator string according to claim 1, characterized in that: The load-bearing plate is a rectangular block, and is provided with a U-shaped groove, the width of which is slightly larger than the thickness of the second connecting plate; a plurality of positioning holes symmetrically arranged along the center of the load-bearing plate are provided on the outer wall corresponding to the U-shaped groove of the load-bearing plate, and the spacing between the positioning holes is the same as the spacing between the construction holes of the second connecting plate; a connecting column is provided at the bottom of the load-bearing plate, and a lifting ring is provided on the connecting column, and the lifting ring is detachably connected to the fixing hook.

3. The auxiliary replacement device for a suspension double insulator string according to claim 2, characterized in that: A positioning pin is sleeved in the positioning hole of the load-bearing plate.

4. The auxiliary replacement device for a suspension double insulator string according to claim 3, characterized in that: One end of the positioning pin is designed in a circular pancake shape; the other end of the positioning pin is rotatably connected to a movable clamping strip, a connecting hole is opened at the center of the movable clamping strip, the connecting hole is sleeved with a connecting shaft, and the connecting shaft is fixedly connected to the positioning pin.

5. The auxiliary replacement device for a suspension double insulator string according to claim 4, characterized in that: The locating pin is provided with a receiving groove at one end away from the circle, the locating pin is fixedly connected in the receiving groove, the locating pin is rotatably connected to the movable clamping bar, and the weight difference between the two ends of the movable clamping bar is at least twice.

6. The auxiliary replacement device for a suspension double insulator string according to claim 1, characterized in that: A centering device is provided between the hoisting hook of the hoisting hoist and the fixed conductor at the end of the insulator.

7. The auxiliary replacement device for a suspension double insulator string according to claim 6, characterized in that: The centering device comprises: a connecting seat, a lifting lug fixedly connected to the top of the connecting seat, a walking pulley rotatably connected to the connecting seat, a positioning pulley coaxially fixedly connected to the walking pulley, a driven pulley arranged below the same plane as the positioning pulley, and a measuring tape with a ruler body placed between the positioning pulley and the driven pulley; a bending portion is provided at the bottom of the connecting seat, and the bending portion is detachably connected to the conducting wire; the bottom of the connecting seat is a U-shaped structure, and the walking pulley is rotatably connected to the U-shaped structure. The positioning pulley is arranged on one side of the connecting seat, and the bending portion is arranged on the other side of the connecting seat, and the circumference of the walking pulley is twice that of the positioning pulley; the lifting lug is detachably connected to the lifting hook of the hoist; and the tooth hook of the measuring tape is aligned with the left side of the connecting seat.

8. The auxiliary replacement device for a suspension double insulator string according to claim 7, characterized in that: A clamping seat is provided on the outside of the connecting seat, and the clamping seat is detachably connected to the measuring tape. The clamping seat includes a supporting plate and a clamping plate. The supporting plate is fixedly connected to the connecting seat, and the clamping plate is slidably connected to the supporting plate. A screw rod is provided between the clamping plate and the connecting seat, and a handle is provided at the end of the screw rod.

9. A method for auxiliary replacement of a suspension double insulator string, using the auxiliary replacement device for a suspension double insulator string according to any one of claims 1 to 5, characterized in that: The steps include: S1. Install the load-bearing plate. Align the U-shaped groove of the load-bearing plate with the second connecting plate, and gently insert the second connecting plate so that the positioning hole is coaxial with the construction hole. Insert the positioning pins into the positioning holes at both ends of the load-bearing plate, adjust the movable card strip to a vertical state, and lock the positioning pins to fix the load-bearing plate; S2. Connect the lifting device, connect the lifting ring with the hoisting hook, connect the hoisting hook with the fixed wire at the end of the insulator, and fix the hoisting hook in the middle of the two insulators; S3, apply tension, apply tension through the hoist, and transfer the tension borne by the two insulators to the hoist; S4. Replace the suspended double insulator string and untie the hanging point of the target insulator string. At this time, the second connecting plate remains horizontal and will not tilt, which is convenient for operators to safely disassemble and replace the insulator string; S5. Remove the load-bearing plate and connect the lifting equipment.

10. A method for auxiliary replacement of a suspension double insulator string, using the auxiliary replacement device for a suspension double insulator string according to any one of claims 1 to 8, characterized in that: The steps include: S1. Install the load-bearing plate. Align the U-shaped groove of the load-bearing plate with the second connecting plate, and gently insert the second connecting plate so that the positioning hole is coaxial with the construction hole. Insert the positioning pins into the positioning holes at both ends of the load-bearing plate, adjust the movable card strip to a vertical state, and lock the positioning pins to fix the load-bearing plate; S2. Connect the lifting device and perform centering. Connect the lifting ring to the fixed hook of the hoisting hoist, connect the lifting hook of the hoisting hoist to the lifting ear of the centering device, and place the connecting seat close to the right side of the connection point between the left insulator and the conductor to ensure that the tooth hook of the tape measure is aligned with the left side of the connecting seat. At this time, control the positioning pulley to engage with the conductor. After the positioning pulley is engaged with the conductor, press down the connecting seat and move the connecting seat along the conductor until the connecting seat is close to the left side of the connection point between the right insulator and the conductor; at this time, place the bent portion under the conductor, and use the position of the tooth hook of the tape measure as a reference, that is, move the connecting seat so that the tooth hook of the tape measure is close to the right side of the connection point between the left insulator and the conductor, and engage the bent portion with the conductor; S3, apply tension, apply tension through the hoist, and transfer the tension borne by the two insulators to the hoist; S4. Replace the suspended double insulator string and untie the hanging point of the target insulator string. At this time, the second connecting plate remains horizontal and will not tilt, which is convenient for operators to safely disassemble and replace the insulator string; S5. Remove the load-bearing plate, connecting slings and centering device.

Images