CN117284917A - Casing pipe dismounting tool, dismounting method and mounting method - Google Patents

Casing pipe dismounting tool, dismounting method and mounting method Download PDF

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Publication number
CN117284917A
CN117284917A CN202311394781.2A CN202311394781A CN117284917A CN 117284917 A CN117284917 A CN 117284917A CN 202311394781 A CN202311394781 A CN 202311394781A CN 117284917 A CN117284917 A CN 117284917A
Authority
CN
China
Prior art keywords
rope
sleeve
lead
hook
lifting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311394781.2A
Other languages
Chinese (zh)
Inventor
陈冲
张庆源
潘政
李建刚
吴劲波
李金�
朱牟
蔡荣清
尹廷凇
余钦
李文彩
陈宏明
钟庆华
姚呈册
和斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaneng Lancang River Hydropower Co Ltd
Original Assignee
Huaneng Lancang River Hydropower Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huaneng Lancang River Hydropower Co Ltd filed Critical Huaneng Lancang River Hydropower Co Ltd
Priority to CN202311394781.2A priority Critical patent/CN117284917A/en
Publication of CN117284917A publication Critical patent/CN117284917A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

The invention belongs to the technical field of power equipment maintenance and discloses a sleeve dismounting tool, a dismounting method and an installation method, wherein the sleeve dismounting tool comprises a lifting hook, a first rope, a fixed pulley and a second rope, the lifting hook is suitable for being connected with a lifting device, the first end of the first rope is connected with the lifting hook, the second end of the first rope is suitable for being connected with a sleeve, the first ropes are distributed at intervals along the circumferential direction of the sleeve, the fixed pulley is connected with the lifting hook, a part of the second rope is wound on the fixed pulley, the first end of the second rope is suitable for being connected with a lead wire, the second end of the second rope is suitable for being connected with a winch, and/or the second end of the second rope is suitable for being pulled by manpower. According to the invention, the sleeve is pulled by the lifting hook and the first rope, and the lead is pulled by the fixed pulley and the second rope penetrating through the fixed pulley, so that the lead can be conveniently pulled and controlled by a worker when the sleeve is disassembled and assembled, and accidents such as friction between the lead and the inner wall of the sleeve and falling of the lead are greatly reduced.

Description

Casing pipe dismounting tool, dismounting method and mounting method
Technical Field
The invention belongs to the technical field of maintenance of power equipment, and particularly relates to a sleeve dismounting tool, a sleeve dismounting method and a sleeve mounting method.
Background
In electric power transmission equipment, high-voltage bushings are the most commonly used electrical components, and are equipment components which bear current carrying and insulating effects when high-voltage lines pass through walls, equipment shells and equipment are connected or grounded, and the application of the high-voltage bushings is quite wide. The cable-penetrating high-voltage sleeve is quite simple in structure, namely, the center of the sleeve is a cavity channel for guiding an inner lead of the electrical equipment to the outside of the equipment. In some special cases, the high-voltage cable bushing needs to be removed and installed in the processes of equipment reconstruction, defect treatment, overhaul and the like.
In the related art, when dismantling and installing the high-voltage cable bushing, because the high-voltage bushing with the voltage level of 500kV and above is longer (more than eight nine meters), when the bushing is disassembled and assembled by a worker, the lead is difficult to control, the friction between the lead and the inner wall of the bushing is easy to cause to damage the lead and the bushing, and even the lead falls off to damage electrical equipment.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a dismounting tool for a high-voltage sleeve, which is convenient for a worker to pull a lead when dismounting the sleeve, and greatly reduces the accidents of friction between the lead and the inner wall of the sleeve, falling of the lead and the like.
The embodiment of the second aspect of the invention also provides a dismantling method for the high-voltage bushing.
An embodiment of the third aspect of the present invention also provides an installation method for a high-voltage bushing.
The sleeve disassembling tool comprises a lifting hook, a first rope, a fixed pulley and a second rope, wherein the lifting hook is suitable for being connected to a lifting device, a first end of the first rope is connected to the lifting hook, a second end of the first rope is suitable for being connected to a sleeve, a plurality of first ropes are distributed at intervals along the circumferential direction of the sleeve, the fixed pulley is connected to the lifting hook, a part of the second rope is wound on the fixed pulley, a first end of the second rope is suitable for being connected to a lead wire, a second end of the second rope is suitable for being connected to a winch, and/or a second end of the second rope is suitable for being pulled by manpower.
According to the sleeve dismounting tool disclosed by the embodiment of the invention, the sleeve is towed through the lifting hook and the first rope, and the fixed pulley connected to the lifting hook and the second rope penetrating through the fixed pulley are used for towing the lead, so that a worker can conveniently control the towing of the lead when dismounting the sleeve, accidents such as friction between the lead and the inner wall of the sleeve and falling of the lead are greatly reduced, and the dismounting efficiency is improved.
In some embodiments, the sleeve removing tool of the present embodiment further comprises a bearing member adapted to be detachably connected to and positioned over the lead wire, and the first end of the second rope is connected to the bearing member such that the second rope is connected to the lead wire through the bearing member.
In some embodiments, the lengths of a plurality of the first cords are the same.
In some embodiments, the first rope is at least one of a nylon sling, a nylon rope, a polyester glass sling, and a polyester glass rope, and/or the second rope is at least one of a nylon sling, a nylon rope, a polyester glass sling, and a polyester glass rope.
The sleeve dismantling method of the embodiment of the second aspect of the invention comprises the following steps:
providing a sleeve disassembling tool, wherein the sleeve disassembling tool is the sleeve disassembling tool in any embodiment, and the lifting hook and the fixed pulley are driven to move to the position right above the sleeve by using the lifting device;
connecting a first end of the second rope to the lead wire and passing the second rope through the fixed pulley, a second end of the second rope being pulled by the hoist and/or a second end of the second rope being pulled by human power;
connecting a first end of a plurality of said first cords to said sleeve and a second end of a plurality of said first cords to said hook;
driving the lifting hook to move upwards by using the lifting device until a plurality of first ropes are tightened, and pulling the second end of the second rope until the second rope is tightened;
removing bolts on the sleeve and the electrical equipment connecting flange to separate the sleeve from the electrical equipment;
and driving the lifting hook to move upwards by using the lifting device so as to drive the sleeve to move upwards, and simultaneously releasing the second rope to move the lead downwards relative to the sleeve until the lead is completely moved out of the sleeve.
According to the sleeve disassembling method provided by the embodiment of the invention, the sleeve is disassembled by adopting the sleeve disassembling tool, when the lifting hook drives the sleeve to move upwards, a worker pulls the lead by using the second rope and the fixed pulley, so that the lead is always kept in a vertical state, and accidents such as friction between the lead and the sleeve, falling of the lead and the like are greatly reduced.
In some embodiments, before the first end of the second rope is connected to the lead, an annular lifting lug is connected to a lead post of the lead, and the first end of the second rope is connected to the annular lifting lug so that the second rope is connected to the lead through the annular lifting lug.
In some embodiments, in the step of driving the hook to move upward using the lifting device to drive the sleeve to move upward while releasing the second rope to move the lead downward relative to the sleeve, the second rope is always in tension and the speed of releasing the second rope is equal to the speed of moving the hook upward.
The sleeve mounting method according to the embodiment of the third aspect of the invention comprises the following steps:
providing a sleeve removing tool, wherein the sleeve removing tool is any one of the sleeve removing tools described in the above embodiments, and the first ends of the plurality of first ropes are connected to the sleeve, and the second ends of the plurality of first ropes are connected to the hooks;
driving the lifting hook to drive the sleeve to move to the position right above the lead by using the lifting device;
passing the second rope through a fixed sheave with a first end of the second rope entering the sleeve from an upper end of the sleeve and exiting the sleeve from a lower end of the sleeve, connecting the first end of the second rope to the lead, and pulling a second end of the second rope by the hoist, and/or pulling a second end of the second rope by human force;
driving the lifting hook to drive the sleeve to move downwards by using the lifting device, and simultaneously pulling the second rope to move the lead upwards relative to the sleeve until the sleeve is in contact with electrical equipment;
and installing bolts on the sleeve and the electric equipment connecting flange so as to connect the sleeve and the electric equipment into a whole.
According to the sleeve mounting method, the sleeve is mounted by adopting the sleeve mounting and dismounting tool, when the lifting hook drives the sleeve to move downwards, a worker pulls the lead by using the second rope and the fixed pulley, so that the lead is always kept in a vertical state, and accidents such as friction between the lead and the sleeve and falling of the lead are greatly reduced.
In some embodiments, a loop-shaped shackle is attached to the post of the lead prior to pulling the second rope to move the lead upward relative to the sleeve, and the first end of the second rope is attached to the loop-shaped shackle to allow the second rope to be attached to the lead through the loop-shaped shackle.
In some embodiments, in the process that the lifting device is used for driving the lifting hook to drive the sleeve to move downwards, and the second rope is pulled at the same time so that the lead wire moves upwards relative to the sleeve, the second rope is always in a tensioning state, and the speed of pulling the second rope is equal to the speed of the lifting hook to move downwards.
Drawings
FIG. 1 is a schematic view of a casing removal tool according to an embodiment of the present invention.
Fig. 2 is a schematic illustration of a sleeve removal method according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a sleeve installation method according to an embodiment of the present invention.
Reference numerals:
a sleeve 100;
a lead 200;
a lifting hook 1; a first rope 2; a fixed pulley 3; a second rope 4; and a load bearing member 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A casing removing tool according to an embodiment of the first aspect of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, the grommet attaching and detaching tool of the embodiment of the first aspect of the present invention includes a hook 1, a first rope 2, a fixed sheave 3, and a second rope 4.
The lifting hook 1 is suitable for being connected with a lifting device, the lifting device selects a proper lifting device according to the position and the height of a sleeve to be disassembled and assembled, a mobile crane is generally selected outdoors, and a proper lifting appliance can be selected indoors according to the actual situation of the site; the first end (the upper end as shown in fig. 1) of the first rope 2 is connected to the lifting hook 1, the second end (the lower end as shown in fig. 1) of the first rope 2 is suitable for being connected to the sleeve, the first rope 2 can be connected to the flange plate of the sleeve, and can also be connected to other structures of the sleeve, which can be used for fixing the first rope 2, the first ropes 2 are multiple, the first ropes 2 are distributed at intervals along the circumference of the sleeve, the stability of the sleeve in the dismounting process is ensured by the first ropes 2, and the risk of collision and friction with a lead due to shaking of the sleeve is reduced.
The fixed pulley 3 is connected with the lifting hook 1, and the fixed pulley 3 is arranged below the lifting hook 1, so that the fixed pulley 3 is convenient to disassemble and assemble and a worker can conveniently control the fixed pulley 3; a part of the second rope 4 is wound around the fixed pulley 3, a first end (an end positioned in the sleeve as shown in fig. 1) of the second rope 4 is suitable for being connected to the lead wire, a second end (an end positioned outside the sleeve as shown in fig. 1) of the second rope 4 is suitable for being connected to a winch, a worker controls the speed of winding/unwinding the second rope 4 by controlling the rotating speed of the winch, the second end of the second rope 4 is also suitable for being pulled by manpower, the worker controls the winding/unwinding speed of the second rope 4 so as to keep the lead wire vertically pulled up and avoid the lead wire from being broken or damaged by electrical equipment due to the fact that the lead wire is excessively pulled, the second end of the second rope 4 is also suitable for being pulled together by the winch and the manpower, the worker controls the winding/unwinding speed of the second rope 4 and pulls the second rope 4 through the aid of the winch, the labor intensity of the worker is reduced, and the accident that the second rope 4 slides down due to improper operation of the worker is reduced.
Before the sleeve is disassembled, a proper lifting device is selected according to the position and the height of the sleeve to be disassembled, the lifting hook 1 is connected to the lifting device, and then the fixed pulley 3 is connected to the lifting hook 1.
When the sleeve is disassembled, the lifting hook 1 and the fixed pulley 3 are moved to the upper part of the sleeve to be disassembled by using the lifting device, two ends of the first rope 2 are respectively connected to the sleeve and the lifting hook 1, meanwhile, the second rope 4 passes through the fixed pulley 3, the first end of the second rope 4 is connected to the upper part of the lead, the second end of the second rope 4 is pulled, the lifting hook 1 is vertically lifted by using the lifting device to stop the tensioning of the first rope 2, the second rope 4 is pulled to tighten the second rope 4, after the sleeve is disassembled from the electrical equipment, the lifting hook 1 is vertically lifted by using the lifting device, the second rope 4 is slowly loosened, the lead is always kept in a vertical state under the action of the second rope 4, the lifting hook 1 is continuously lifted to enable the lead to be completely removed from the sleeve, and the sleeve is disassembled.
When the sleeve is installed, the sleeve is fixed on the lifting hook 1 through the first rope 2, the lifting device is used for moving the lifting hook 1 and the fixed pulley 3 to the position above an installation opening of an electrical device to be installed with the sleeve, the first end of the second rope 4 is connected to a lead wire, the second rope 4 passes through the sleeve and the fixed pulley 3 from the lower side of the sleeve, the second end of the second rope 4 is pulled to keep the lead wire in a vertical state, the lifting device is used for slowly moving the lifting hook 1 and the fixed pulley 3 downwards, meanwhile, the second rope 4 is pulled to tighten the second rope 4 so as to enable the sleeve to move downwards relative to the lead wire until the lower end of the sleeve contacts the electrical device, and then the sleeve is connected to the electrical device, so that the sleeve installation is completed.
According to the sleeve dismounting tool disclosed by the embodiment of the invention, the sleeve is towed through the lifting hook 1 and the first rope 2, and the lead is towed through the fixed pulley 3 connected to the lifting hook 1 and the second rope 4 penetrating through the fixed pulley 3, so that a worker can conveniently carry out traction control on the lead when dismounting the sleeve, accidents such as friction between the lead and the inner wall of the sleeve and falling of the lead are greatly reduced, and the dismounting efficiency is improved.
As shown in fig. 1, in some embodiments, the sleeve removing tool of the present invention further includes a bearing member 5, wherein the bearing member 5 is adapted to be detachably connected to and located above the lead wire, and the first end of the second rope 4 is connected to the bearing member 5 such that the second rope 4 is connected to the lead wire through the bearing member 5.
Optionally, the load bearing member 5 is an annular lifting lug, which is screwed onto the lead wire and located above the lead wire, and the first end of the second rope 4 is connected with a hook (not shown), so that the first end of the second rope 4 is connected with the annular lifting lug through the hook.
It will be appreciated that after the load bearing member 5 is attached to the lead, it is convenient to attach to the second rope 4 on the one hand and to carry the upward tension of the second rope 4 on the other hand, reducing damage to the lead when it is lifted.
In some embodiments, the lengths of the plurality of first ropes 2 are the same.
It will be appreciated that since the lengths of the plurality of first ropes 2 are the same, the lengths of the plurality of first ropes 2 between the hook 1 and the socket are the same after the plurality of first ropes 2 are connected to the hook 1 and the socket, and the socket is prevented from being inclined due to uneven tension of the first ropes 2 to the socket caused by unequal lengths, thereby reducing accidents such as collision with a wire, friction, etc. caused by inclination of the socket.
In some embodiments, the first rope 2 is at least one of a nylon sling, a nylon rope, a polyester glass sling, and a polyester glass rope, and/or the second rope 4 is at least one of a nylon sling, a nylon rope, a polyester glass sling, and a polyester glass rope.
It should be noted that:
the first rope 2 can be one of a nylon sling, a nylon rope, a polyester glass sling and a polyester glass rope, can also be a plurality of one of a nylon sling, a nylon rope, a polyester glass sling and a polyester glass rope, and can also be a plurality of one of a nylon sling, a nylon rope, a polyester glass sling and a polyester glass rope, for example, the first rope 2 is formed by combining one nylon sling and one polyester glass sling, after the first rope 2 is connected to the lifting hook 1 and the sleeve, the one nylon sling and the one polyester glass sling are stressed, when one of the one nylon sling and the one polyester glass sling is broken, the other one pulls the sleeve, so that accidents such as sleeve collision and friction with a lead caused by the breakage of the first rope 2 are reduced, and the reliability of the first rope 2 is improved.
The second rope 4 can be one of a nylon sling, a nylon rope, a polyester glass sling and a polyester glass rope, can also be a plurality of one of a nylon sling, a nylon rope, a polyester glass sling and a polyester glass rope, and can also be a plurality of one of a nylon sling, a nylon rope, a polyester glass sling and a polyester glass rope, for example, the second rope 4 is formed by combining two nylon ropes, and after the second rope 4 is connected to a lead wire, the two nylon ropes are stressed, when one of the nylon ropes is broken, the other nylon rope pulls the lead wire, so that the accident that the lead wire and electrical equipment are damaged due to the falling of the lead wire caused by the breakage of the second rope 4 is reduced.
The method of casing removal according to the embodiment of the second aspect of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the sleeve removing method according to the second aspect of the present invention includes:
s1, providing a sleeve disassembling tool, wherein the sleeve disassembling tool is the sleeve disassembling tool in any embodiment, and the lifting device is used for driving the lifting hook 1 and the fixed pulley 3 to move to the position right above the sleeve.
It should be noted that, after a proper lifting device is selected according to the position (for example, indoor or outdoor) and length of the sleeve to be detached, the lifting hook 1 is connected to the lifting device, and the fixed pulley 3 is connected to the lifting hook 1, the lifting hook 1 is moved to a position right above the sleeve to be detached by using the lifting device.
S2, connecting a first end (an end located inside the sleeve as shown in fig. 1) of the second rope 4 to the lead wire, and passing the second rope 4 through the fixed pulley 3, wherein a second end (an end located outside the sleeve as shown in fig. 1) of the second rope 4 is pulled by the winch, and/or a second end of the second rope 4 is pulled by human power.
In a specific embodiment, the first end of the second rope 4 is adapted to be connected to a lead wire, the second end of the second rope 4 is adapted to be connected to a hoist, and a worker controls the speed of winding/unwinding the second rope 4 by controlling the rotational speed of the hoist, thereby reducing the labor intensity of the worker.
In another specific embodiment, the second end of the second rope 4 is suitable for being pulled by manpower, and a worker controls the retraction/release speed of the second rope 4 according to the moving speed of the lifting hook 1, so that the lead is kept vertically pulled up, and meanwhile, the lead is prevented from being pulled off or damaged by electrical equipment due to excessive pulling force, and the safety when the sleeve is removed is improved.
In yet another specific embodiment, the second end of the second rope 4 is also adapted to be pulled together by a winch and a man power, and the worker controls the take-up/pay-off speed of the second rope 4 while pulling the second rope 4 with the aid of the winch, thereby reducing the labor intensity of the worker and reducing the accident of the second rope 4 slipping due to the improper operation of the worker.
S3, a first end (lower end as shown in fig. 1) of the plurality of first ropes 2 is connected to the sleeve, and a second end (upper end as shown in fig. 1) of the plurality of first ropes 2 is connected to the hook 1.
When the lengths of the plurality of first ropes 2 are the same, the lower ends of the plurality of first ropes 2 are respectively connected to the flange plate of the sleeve, and then the second ends of the plurality of first ropes 2 are connected to the lifting hook 1, so that the connection of the first ropes 2 is completed; when the lengths of the plurality of first ropes 2 are inconsistent, the lower ends of the plurality of first ropes 2 are connected to the flange plate of the sleeve, then the second ropes 4 are tensioned and close to the lifting hook 1, the position, closest to the lifting hook 1, of the second ropes 4 is connected to the lifting hook 1, and the plurality of second ropes 4 are connected to the lifting hook 1 in a tensioned state, so that the lengths of the plurality of first ropes 2 connected between the lifting hook 1 and the sleeve are equal.
S4, using the lifting device to drive the lifting hook 1 to move upwards until the plurality of first ropes 2 are tightened, and pulling the second end of the second rope 4 until the second rope 4 is tightened.
It will be appreciated that tightening the first and second cords 2, 4 avoids the sleeve and lead suddenly falling down to injure personnel and electrical equipment after removal.
S5, removing bolts on the connecting flange of the sleeve and the electrical equipment so as to separate the sleeve and the electrical equipment.
S6, using the lifting device to drive the lifting hook 1 to move upwards so as to drive the sleeve to move upwards, and simultaneously releasing the second rope 4 so as to enable the lead to move downwards relative to the sleeve until the lead is completely moved out of the sleeve.
Further, the speed of releasing the second rope 4 should be consistent with the speed of upward movement of the hook 1.
It should be noted that, since the fixed pulley 3 is connected to the hook 1 and the second rope 4 passes through the fixed pulley 3, when the hook 1 moves upward, the hook 1 drives the fixed pulley 3 to move upward together with the second rope 4, so that when the second rope 4 is not released, the wire moves upward in synchronization with the hook 1, and when the hook 1 remains stationary relative to the electrical device, the second rope 4 is released to increase the length of the second rope 4 between the fixed pulley 3 and the wire, so that the second rope 4 between the fixed pulley 3 and the wire is loosened, and the wire moves downward under the action of its own weight until the second rope 4 between the fixed pulley 3 and the wire is pulled again. When the speed of releasing the second rope 4 is greater than the upward moving speed of the lifting hook 1, the lead moves downwards relative to the electrical equipment so that the lead collides and rubs with the electrical equipment; when the speed of releasing the second rope 4 is less than the upward movement speed of the hook 1, the wire moves upward with respect to the electrical device, causing the wire or the connection portion of the wire with the electrical device to be broken.
According to the sleeve disassembling method provided by the embodiment of the invention, the sleeve is disassembled by adopting the sleeve disassembling tool, when the lifting hook 1 drives the sleeve to move upwards, a worker pulls the lead by using the second rope 4 and the fixed pulley 3, so that the lead is always kept in a vertical state, and accidents such as friction between the lead and the sleeve, falling of the lead and the like are greatly reduced.
In some embodiments, the first end of the second rope 4 is connected to the loop-shaped shackle before the first end of the second rope 4 is connected to the lead, and a loop-shaped shackle is screwed onto the lead post of the lead, and the first end of the second rope 4 is connected to the loop-shaped shackle such that the second rope 4 is connected to the lead through the loop-shaped shackle.
It will be appreciated that after the annular lifting lug is connected to the lead, the annular lifting lug is convenient to connect with the second rope 4 on one hand, and on the other hand, the annular lifting lug bears the upward tension of the second rope 4, so that the damage to the lead when the lead is lifted is reduced.
In some embodiments, in the step of using the lifting device to drive the lifting hook 1 to move upwards to drive the sleeve to move upwards, and simultaneously releasing the second rope 4 to move the lead downwards relative to the sleeve, the second rope 4 is always in tension, and the speed of releasing the second rope 4 is equal to the speed of moving the lifting hook 1 upwards.
The second rope 4 is always in a tensioned state, the speed of releasing the second rope 4 is equal to the upward moving speed of the lifting hook 1, the lead is always pulled by the second rope 4, the collision and friction between the lead and the sleeve caused by the inclination of the lead are reduced, the collision and friction between the lead and the electrical equipment caused by the downward movement of the lead relative to the electrical equipment are also reduced, and the lead or the connecting part between the lead and the electrical equipment caused by the upward movement of the lead relative to the electrical equipment is broken.
A sleeve mounting method according to an embodiment of the third aspect of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1 and 3, a sleeve mounting method according to a third aspect of the present invention includes:
s1, providing a sleeve removing tool, which is the sleeve removing tool according to any one of the above embodiments, wherein first ends (lower ends as shown in fig. 1) of the plurality of first ropes 2 are connected to the sleeve, and second ends (upper ends as shown in fig. 1) of the plurality of first ropes 2 are connected to the hook 1.
It should be noted that, after selecting a proper lifting device according to the position (for example, indoor or outdoor) and length of the required installation sleeve, connecting the lifting hook 1 to the lifting device and connecting the fixed pulley 3 to the lifting hook 1, using the lifting device to move the lifting hook 1 to the position right above the sleeve to be installed, when the lengths of the plurality of first ropes 2 are the same, respectively connecting the lower ends of the plurality of first ropes 2 to the flange plate of the sleeve, and then connecting the second ends of the plurality of first ropes 2 to the lifting hook 1 to complete the connection of the first ropes 2; when the lengths of the plurality of first ropes 2 are inconsistent, the lower ends of the plurality of first ropes 2 are connected to the flange plate of the sleeve, then the second ropes 4 are tensioned and close to the lifting hook 1, the position, closest to the lifting hook 1, of the second ropes 4 is connected to the lifting hook 1, and the plurality of second ropes 4 are connected to the lifting hook 1 in a tensioned state, so that the lengths of the plurality of first ropes 2 connected between the lifting hook 1 and the sleeve are equal.
S2, using the lifting device to drive the lifting hook 1 to drive the sleeve to move to the position right above the lead, and completing the preparation work of installing the sleeve.
S3, the second rope 4 is passed through the fixed pulley 3, the first end of the second rope 4 enters the sleeve from the upper end of the sleeve and leaves the sleeve from the lower end of the sleeve, the first end of the second rope 4 (the end positioned in the sleeve as shown in fig. 1) is connected to the lead wire, the second end of the second rope 4 (the end positioned outside the sleeve as shown in fig. 1) is pulled by the winch, and/or the second end of the second rope 4 is pulled by the human power.
In a specific embodiment, the first end of the second rope 4 is adapted to be connected to a lead wire, the second end of the second rope 4 is adapted to be connected to a hoist, and a worker controls the speed of winding/unwinding the second rope 4 by controlling the rotational speed of the hoist, thereby reducing the labor intensity of the worker.
In another specific embodiment, the second end of the second rope 4 is suitable for being pulled by manpower, and a worker controls the retraction/release speed of the second rope 4 according to the moving speed of the lifting hook 1, so that the lead is kept vertically pulled up, and meanwhile, the lead is prevented from being pulled off or damaged by electrical equipment due to excessive pulling force, and the safety when the sleeve is removed is improved.
In yet another specific embodiment, the second end of the second rope 4 is also adapted to be pulled together by a winch and a man power, and the worker controls the take-up/pay-off speed of the second rope 4 while pulling the second rope 4 with the aid of the winch, thereby reducing the labor intensity of the worker and reducing the accident of the second rope 4 slipping due to the improper operation of the worker.
S4, using the lifting device to drive the lifting hook 1 to drive the sleeve to move downwards, and simultaneously pulling the second rope 4 to enable the lead wire to move upwards relative to the sleeve until the sleeve is in contact with the electrical equipment.
Further, the speed at which the second end of the second rope 4 is pulled should be consistent with the speed at which the hook 1 moves downward.
It should be noted that, because the fixed pulley 3 is connected to the hook 1, and the second rope 4 passes through the fixed pulley 3, when the hook 1 moves downward, the hook 1 drives the fixed pulley 3 to move downward together with the second rope 4, so that when the second rope 4 is not pulled, the lead wire moves downward synchronously with the hook 1; pulling on the second rope 4 while the hook 1 remains stationary relative to the electrical device causes the length of the second rope 4 between the fixed sheave 3 and the lead to decrease, so that the second rope 4 between the fixed sheave 3 and the lead is further tensioned, thereby increasing the tension of the second rope 4 on the lead. When the second rope 4 is pulled at a speed greater than the downward movement speed of the hook 1, the lead moves upward with respect to the electrical device to cause the lead or the connection portion of the lead with the electrical device to be broken; when the second rope 4 is pulled at a speed lower than the downward moving speed of the lifting hook 1, the lead moves downward relative to the electrical equipment, so that the lead collides and rubs with the electrical equipment.
S5, installing bolts on the sleeve and the electric equipment connecting flange so that the sleeve and the electric equipment are connected into a whole, and installing the sleeve is completed.
According to the sleeve mounting method, the sleeve is mounted by adopting the sleeve mounting and dismounting tool, when the lifting hook 1 drives the sleeve to move downwards, a worker pulls the lead by using the second rope 4 and the fixed pulley 3, so that the lead is always kept in a vertical state, and accidents such as friction between the lead and the sleeve and falling of the lead are greatly reduced.
In some embodiments, before pulling the second rope 4 to move the lead upward relative to the sleeve, an annular shackle is attached to the lead post of the lead, and the first end of the second rope 4 is attached to the annular shackle to allow the second rope 4 to be attached to the lead through the annular shackle.
It will be appreciated that after the annular lifting lug is connected to the lead, the annular lifting lug is convenient to connect with the second rope 4 on one hand, and on the other hand, the annular lifting lug bears the upward tension of the second rope 4, so that the damage to the lead when the lead is lifted is reduced.
In some embodiments, in the process of using the lifting device to drive the lifting hook 1 to drive the sleeve to move downwards and simultaneously pulling the second rope 4 to enable the lead wire to move upwards relative to the sleeve, the second rope 4 is always in a tensioning state, and the speed of pulling the second rope 4 is equal to the speed of downwards moving the lifting hook 1.
The second rope 4 is always in a tensioned state, the speed of pulling the second rope 4 is equal to the speed of downward movement of the lifting hook 1, the lead is always pulled by the second rope 4, collision and friction between the lead and the sleeve caused by inclination of the lead are reduced, collision and friction between the lead and the electrical equipment caused by downward movement of the lead relative to the electrical equipment are also reduced, and the lead or the connection part between the lead and the electrical equipment caused by upward movement of the lead relative to the electrical equipment is broken.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (10)

1. A casing removal tool, comprising:
a hook adapted to be connected to a lifting device;
a first rope, a first end of the first rope being connected to the hook, a second end of the first rope being adapted to be connected to a sleeve, the first rope being a plurality of the first ropes, the plurality of the first ropes being spaced apart along a circumference of the sleeve;
the fixed pulley is connected with the lifting hook;
a second rope, a portion of which is wound around the fixed sheave, a first end of which is adapted to be connected to a lead wire, a second end of which is adapted to be connected to a hoisting machine, and/or a second end of which is adapted to be pulled by man power.
2. The casing removal tool of claim 1, further comprising a load bearing member adapted to be removably connected to and over the lead, the first end of the second cord being connected to the load bearing member such that the second cord is connected to the lead through the load bearing member.
3. The casing removal tool of claim 1, wherein a plurality of said first cords are of the same length.
4. The cannula removal tool of claim 1, wherein the first cord is at least one of a nylon sling, a nylon cord, a polyester glass sling, and a polyester glass cord, and/or the second cord is at least one of a nylon sling, a nylon cord, a polyester glass sling, and a polyester glass cord.
5. A method of casing removal comprising:
providing a sleeve disassembling tool, wherein the sleeve disassembling tool is as claimed in any one of claims 1-4, and the lifting hook and the fixed pulley are driven to move to the position right above the sleeve by using the lifting device;
connecting a first end of the second rope to the lead wire and passing the second rope through the fixed pulley, a second end of the second rope being pulled by the hoist and/or a second end of the second rope being pulled by human power;
connecting a first end of a plurality of said first cords to said sleeve and a second end of a plurality of said first cords to said hook;
driving the lifting hook to move upwards by using the lifting device until a plurality of first ropes are tightened, and pulling the second end of the second rope until the second rope is tightened;
removing bolts on the sleeve and the electrical equipment connecting flange to separate the sleeve from the electrical equipment;
and driving the lifting hook to move upwards by using the lifting device so as to drive the sleeve to move upwards, and simultaneously releasing the second rope to move the lead downwards relative to the sleeve until the lead is completely moved out of the sleeve.
6. The method of claim 5, wherein prior to attaching the first end of the second cord to the lead, attaching an annular shackle to a post of the lead, and attaching the first end of the second cord to the annular shackle such that the second cord is attached to the lead via the annular shackle.
7. The method of claim 5, wherein in the step of driving the hook upward using the lifting means to move the sleeve upward while releasing the second rope to move the wire downward with respect to the sleeve, the second rope is always in tension and the speed of releasing the second rope is equal to the speed of upward movement of the hook.
8. A method of installing a sleeve, comprising:
providing a sleeve removing tool, wherein the sleeve removing tool is as defined in any one of claims 1-4, and a plurality of first ends of the first ropes are connected to the sleeve, and a plurality of second ends of the first ropes are connected to the lifting hooks;
driving the lifting hook to drive the sleeve to move to the position right above the lead by using the lifting device;
passing the second rope through a fixed sheave with a first end of the second rope entering the sleeve from an upper end of the sleeve and exiting the sleeve from a lower end of the sleeve, connecting the first end of the second rope to the lead, and pulling a second end of the second rope by the hoist, and/or pulling a second end of the second rope by human force;
driving the lifting hook to drive the sleeve to move downwards by using the lifting device, and simultaneously pulling the second rope to move the lead upwards relative to the sleeve until the sleeve is in contact with electrical equipment;
and installing bolts on the sleeve and the electric equipment connecting flange so as to connect the sleeve and the electric equipment into a whole.
9. The bushing assembly method of claim 8 wherein an annular shackle is attached to a post of the lead wire before pulling the second rope to move the lead wire upward relative to the bushing, the first end of the second rope being attached to the annular shackle to allow the second rope to be attached to the lead wire through the annular shackle.
10. The method of installing a sleeve according to claim 8, wherein the second rope is always in tension and pulled at the same time as the hook moves downward during the upward movement of the lead wire relative to the sleeve by driving the hook downward using the lifting device.
CN202311394781.2A 2023-10-25 2023-10-25 Casing pipe dismounting tool, dismounting method and mounting method Pending CN117284917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311394781.2A CN117284917A (en) 2023-10-25 2023-10-25 Casing pipe dismounting tool, dismounting method and mounting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311394781.2A CN117284917A (en) 2023-10-25 2023-10-25 Casing pipe dismounting tool, dismounting method and mounting method

Publications (1)

Publication Number Publication Date
CN117284917A true CN117284917A (en) 2023-12-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311394781.2A Pending CN117284917A (en) 2023-10-25 2023-10-25 Casing pipe dismounting tool, dismounting method and mounting method

Country Status (1)

Country Link
CN (1) CN117284917A (en)

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