Multifunctional main transformer bushing military cap dismounting tool
Technical Field
The invention relates to the technical field of transformer disassembly, in particular to a multifunctional main transformer bushing military cap disassembling tool.
Background
The transformer bushing is an insulating part for leading high-voltage and low-voltage leads inside the transformer to the outside of an oil tank, wherein the military cap is used as an important part of the bushing, and the transformer bushing not only has the function of electrically connecting a lead cable head inside the bushing with a wiring terminal outside the bushing, but also has the function of sealing the top of the bushing; the disassembly and assembly of the sleeve and the military cap is an important work in the maintenance of the transformer, and the disassembly and assembly quality directly influences the operation safety of the sleeve. At present, the method for disassembling and assembling the military cap mainly comprises the steps of rotating the military cap by using a laryngeal forceps or a belt wrench, prying the military cap by using a wrench, a screwdriver and other tools, further disassembling the military cap, and finally fastening by using the laryngeal forceps or the belt wrench. However, the following problems exist in the assembling and disassembling process:
1. the transformer runs for a long time, the military cap, the sealing gasket and the sleeve sealing platform are firmly attached, and the damage to the military cap or the sleeve sealing platform can be caused by prying the military cap by using tools such as a screwdriver and the like;
2. the military cap is easy to slip by rotating the laryngeal forceps or the belt wrench, so that the safety is poor;
3. the military cap cannot ensure that the emergency torque meets the requirement by using a laryngeal forceps or a belt wrench for fastening, if the torque is too small, the sleeve can be leaked and overheated, and if the torque is too large, the cable head positioning pin in the sleeve can be damaged;
4. in field overhaul, due to the limitation of an aerial work platform, the high-voltage bushing is disassembled and assembled by one person, but the disassembly and the assembly of one person are difficult for the structure with a locking nut under the military cap.
Therefore, there is a need to develop a multifunctional disassembling tool for the transformer bushing and the military cap, which is suitable for different types of military cap structures and improves the disassembling reliability of the military cap.
Disclosure of Invention
The invention provides a multifunctional main transformer casing pipe military cap dismounting tool which comprises a bell-shaped cover, a top positioning assembly, a side positioning assembly and a bottom positioning assembly;
the top positioning assembly comprises a first base, a first threaded ejector rod, a first hand wheel and a first anti-skid cushion block; the first base is fixed at the center of the top of the bell-shaped cover, the first threaded ejector rod penetrates through the first base and the bell-shaped cover in a threaded manner, the first anti-skid cushion block is installed at one end, located inside the bell-shaped cover, of the first threaded ejector rod, and a first hand wheel is fixedly installed at the other end of the first threaded ejector rod;
the side positioning assembly comprises a second base, a second threaded mandril, a second hand wheel and a second anti-skid cushion block; the second base is fixed on the side wall of the bell-shaped cover, the second threaded ejector rod penetrates through the second base and the bell-shaped cover in a threaded manner, the second anti-skid cushion block is installed at one end, located inside the bell-shaped cover, of the second threaded ejector rod, and a second hand wheel is fixedly installed at the other end of the second threaded ejector rod;
the bottom positioning assembly comprises a third threaded ejector rod, a third hand wheel and a third anti-skidding cushion block, a third base is formed at the bottom of the bell-shaped cover, the third threaded ejector rod penetrates through the third base in a threaded mode, the third threaded ejector rod is located at one end below the bell-shaped cover, the third anti-skidding cushion block is installed at one end of the third threaded ejector rod, and the third hand wheel is fixedly installed at the other end of the third threaded ejector rod.
Furthermore, the first anti-skid cushion block is connected with the first threaded ejector rod through a first bearing, so that the first anti-skid cushion block and the first threaded ejector rod can rotate relatively in the radial direction.
Furthermore, a second anti-skid cushion block is connected with the second threaded ejector rod through a second bearing, so that the second anti-skid cushion block and the second threaded ejector rod can rotate relatively in the radial direction.
Furthermore, a third anti-slip cushion block is connected with the third threaded ejector rod through a third bearing, so that the third anti-slip cushion block and the third threaded ejector rod can rotate relatively in the radial direction.
Furthermore, the side positioning assemblies are at least one pair and are symmetrically distributed on the side wall of the bell jar.
Furthermore, a nut structure is formed outside the first base, and a force application point is formed by matching the torque wrench.
Furthermore, the third bases are at least one pair and are symmetrically distributed at the bottom of the bell jar.
Furthermore, a pair of operating handles is symmetrically welded in the middle of the bell-shaped cover.
The invention has the advantages and positive effects that:
the invention can disassemble and assemble various general caps and can effectively avoid the damage to the general caps and the sealing structure in the disassembling and assembling process; through the design of the first base nut structure, the mounting torque of the military cap meets the requirement, so that the problems of overheating and leakage caused by overhigh or overlow torque are avoided; the military cap can be disassembled and assembled by using the tool, so that the slipping phenomenon can be avoided, the safety is improved, the limitation of the operation space is effectively solved, and the manpower is saved.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
Fig. 1 is a schematic front view of a multifunctional main transformer bushing and military cap dismounting tool according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a multifunctional main transformer bushing and military cap dismantling tool according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a multifunctional main transformer bushing and military cap dismounting tool according to an embodiment of the present invention;
fig. 4 is a structural cross-sectional view of the multifunctional main transformer bushing and military cap dismounting tool according to the embodiment of the invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 4, the multifunctional main transformer casing pipe military cap dismounting tool comprises a bell-shaped cover 1, a top positioning assembly 2, a side positioning assembly 3 and a bottom positioning assembly 4;
the top positioning assembly comprises a first base 201, a first threaded mandril 202, a first handwheel 203 and a first anti-skid cushion block 204; the first base is fixed at the center of the top of the bell-shaped cover, the first threaded ejector rod penetrates through the first base and the bell-shaped cover in a threaded manner, the first anti-skid cushion block is installed at one end, located inside the bell-shaped cover, of the first threaded ejector rod, and a first hand wheel is fixedly installed at the other end of the first threaded ejector rod;
the side positioning component comprises a second base 301, a second threaded mandril 302, a second hand wheel 303 and a second anti-skid cushion block 304; the second base is fixed on the side wall of the bell-shaped cover, the second threaded ejector rod penetrates through the second base and the bell-shaped cover in a threaded manner, the second anti-skid cushion block is installed at one end, located inside the bell-shaped cover, of the second threaded ejector rod, and a second hand wheel is fixedly installed at the other end of the second threaded ejector rod;
the bottom positioning assembly comprises a third threaded ejector rod 401, a third hand wheel 402 and a third anti-skidding cushion block 403, a third base 404 is formed at the bottom of the bell jar, the third threaded ejector rod penetrates through the third base in a threaded manner, the third threaded ejector rod is located at one end of the lower portion of the bell jar, the third anti-skidding cushion block is installed at the other end of the third threaded ejector rod, and the third hand wheel is fixedly installed at the other end of the third threaded ejector rod.
The first anti-skid cushion block is connected with the first threaded mandril through a first bearing, so that the first anti-skid cushion block and the first threaded mandril can rotate relatively in the radial direction; the second anti-skid cushion block is connected with the second threaded mandril through a second bearing, so that the second anti-skid cushion block and the second threaded mandril can rotate relatively in the radial direction; the third anti-sliding cushion block is connected with the third threaded mandril through a third bearing, so that the third anti-sliding cushion block and the third threaded mandril can rotate relatively in the radial direction; the first anti-skid cushion block, the second anti-skid cushion block and the third anti-skid cushion block do not rotate along with the first threaded ejector rod, the second threaded ejector rod and the third threaded ejector rod when the first threaded ejector rod, the second threaded ejector rod and the third threaded ejector rod rotate.
In order to make the positioning of the armcap more stable and uniform by the side positioning assemblies, it is considered that the side positioning assemblies are at least one pair and are symmetrically distributed on the side wall of the bell housing.
In addition, the first base is externally provided with a nut structure, and a force application point is formed by matching the torque wrench.
Accordingly, the third bases are at least one pair and are symmetrically disposed on the bottom of the bell housing, and therefore, the number of bottom positioning assemblies should match the number of third bases.
And a pair of operating handles 5 are symmetrically welded in the middle of the bell-shaped cover.
It should be noted that the casing mainly divides the military cap into 3 structures: the structure of the military cap and the conducting rod is integrated (with a lock nut), the structure of the military cap and the conducting rod is integrated (without the lock nut), and the structure of the military cap and the conducting rod is separated.
By way of example, in the present embodiment, when the construction is performed using the attaching and detaching tool:
1. when the integrated (lockless nut) structure of the military cap and the conducting rod is disassembled and assembled, the bell-shaped cover and the side positioning assembly are combined, the tool and the military cap are fixed by rotating a second hand wheel in the side positioning assembly, the tool is rotated by the operating handle so as to disassemble the military cap, and when the military cap is installed, a torque wrench is used for fastening the military cap through the first base in the shape of a nut at the top of the bell-shaped cover;
2. when the structure integrating the military cap and the conducting rod (provided with the lock nut) is disassembled and assembled, the bell-shaped cover, the side positioning assembly and the bottom positioning assembly are combined, and the tool and the military cap are fixed through a second hand wheel in the side positioning assembly; secondly, rotating a third hand wheel of the bottom positioning assembly, and jacking the tool and the military cap by taking the sleeve oil conservator as a fulcrum; furthermore, the locking nut is disassembled (fastened) through the combination of the piece wrench and the tool, and finally the military cap is disassembled and assembled;
3. when the detachable military cap and the conducting rod are in a split structure, the bell-shaped cover, the side positioning assembly and the top positioning assembly are combined, the tool and the military cap are fixed through the second hand wheel of the side positioning assembly, the first hand wheel of the top positioning assembly is further rotated, the conducting rod is used as a fulcrum, the tool and the military cap are moved upwards, and the military cap is finally detached.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.