CN107342553B - Replacing fixture and replacing method for linear duplex V-string insulator - Google Patents
Replacing fixture and replacing method for linear duplex V-string insulator Download PDFInfo
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- CN107342553B CN107342553B CN201710244069.2A CN201710244069A CN107342553B CN 107342553 B CN107342553 B CN 107342553B CN 201710244069 A CN201710244069 A CN 201710244069A CN 107342553 B CN107342553 B CN 107342553B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention relates to the technical field of auxiliary power equipment, and provides a replacing clamp and a replacing method for a linear duplex V-string insulator. The fixture includes: the device comprises a closed clamp, two screw rods, a large knife clamp and a rotary clamp; two ends of the closed clamp are respectively connected with the same ends of the two lead screws, and the other ends of the two lead screws are respectively connected with two ends of the rotating clamp; the middle part of the bottom end of the rotary card is connected with the top end of the large knife card, and the rotary card and the large knife card can rotate relatively; the tail end of the large knife clamp is provided with a fixed hook connected with a triangular yoke plate, and a fulcrum pin hole perpendicular to the surface of the large knife clamp is arranged between the fixed hook and the connecting point of the rotary clamp and the large knife clamp on the large knife clamp. The replacing fixture and the replacing method for the linear duplex V-string insulator, provided by the invention, are simple and convenient to operate, safe and reliable, and can greatly improve the insulator replacing efficiency, reduce the labor intensity and improve the economic benefit.
Description
Technical Field
The invention relates to the technical field of auxiliary power equipment, in particular to a replacing clamp and a replacing method for a linear duplex V-string insulator.
Background
The insulator is a main component of a power transmission line and plays two basic roles in the overhead power transmission line, namely supporting a lead and preventing current from flowing back to the ground. When insulator type defects occur on the line, the insulators need to be replaced. The extra-high voltage direct current line has more mountainous areas in common approaches and larger span, and the load, the size and the weight of a pole tower insulator are greatly increased compared with those of a common line.
At present, two replacing tools for the linear duplex V-string insulator of the extra-high voltage direct current line are mainly used. The first tool is a traditional chain hoist, and the specific implementation method comprises the following steps: the insulator string is tightened through the chain hoist and the wire lifting hook, so that the load is transferred, and the insulator is replaced. And the second tool is a closed fixture, and the screw rod replaces the insulator to bear force by tightening the screw rod, and then the insulator in the middle of the insulating string is replaced.
The insulator is replaced by using the traditional chain block, the tools and appliances are heavy, the operation flow is complicated, the number of operators is large, the labor intensity is high, and the insulator is easy to damage due to inconvenient operation in the replacement process. The closed type clamp is used for replacing the insulators, the first insulators and the hardware fittings at the two ends of the insulator string cannot be replaced, and the direction of the closed type clamp cannot be freely adjusted so as to facilitate operation. In a word, the traditional insulator replacing tool has the problems of difficulty in replacement, low efficiency, high labor intensity, high operation risk and the like, and brings great inconvenience to daily defect elimination and maintenance work.
Disclosure of Invention
The invention aims to provide a replacing clamp and a replacing method for a linear duplex V-string insulator, which are used for solving the problems of difficulty in replacing, low efficiency, high labor intensity, high operation risk and the like caused by a traditional insulator replacing tool in the prior art, and thus convenience is brought to daily defect elimination and maintenance work.
In order to overcome the problems or at least partially solve the problems, the invention provides a replacing fixture and a replacing method for a linear duplex V-string insulator.
In one aspect, the present invention provides a fixture for replacing a linear duplex V-string insulator, including: the device comprises a closed clamp, two screw rods, a large knife clamp and a rotary clamp; two ends of the closed clamp are respectively connected with the same ends of the two lead screws, and the other ends of the two lead screws are respectively connected with two ends of the rotating clamp; the middle part of the bottom end of the rotary card is connected with the top end of the large knife card, and the rotary card and the large knife card can rotate relatively; the tail end of the large knife clamp is provided with a fixed hook connected with a triangular yoke plate, and a fulcrum pin hole perpendicular to the clamping surface of the large knife clamp is arranged between the fixed hook and the connecting point of the rotary clamp and the large knife clamp on the large knife clamp.
The triangular yoke plate is provided with a right-angle hanging plate, and the large knife clip is hung on the right-angle hanging plate through the fixed hook.
And a fulcrum bolt is arranged in the fulcrum pin hole, and the large cutter clamp can be clamped and clamped on the triangular connecting plate through the fulcrum bolt by utilizing the slope of the triangular connecting plate.
The fulcrum pin hole rows are arranged in parallel with the slope of the triangular connecting plate in rows.
The fulcrum pin shaft hole rows are parallel to each other to adapt to triangular connecting plates of different models.
Grooves are formed in two ends of the rotating clamp, and corresponding fixing clamping sleeves are arranged on the two screw rods, so that the two screw rods are connected with the rotating clamp by clamping the fixing clamping sleeves in the grooves; and a threaded sleeve is arranged above the fixed clamping sleeve so as to tighten the two screw rods by driving the threaded sleeve.
Wherein, two are connected respectively at the both ends of closed card the same one end of lead screw includes: and two ends of the closed clamp are respectively hinged to the same ends of the two screw rods.
Wherein, two the lead screw with the one end that closed card is connected is equipped with the adapter, the adapter is used for the extension the effective length of lead screw is in order to be applicable to the insulator chain of different length.
Wherein, the rotary card and the big knife card are connected through a rotary shaft.
On the other hand, the invention provides a method for replacing a linear duplex V-string insulator based on the fixture, which comprises the following steps: the fulcrum bolt is arranged in the fulcrum pin hole, the fixed hook is hung on the fixed fulcrum by using the fixed fulcrum on the triangular connecting plate to serve as a first stress point, the large knife clip is clamped on the slope of the triangular connecting plate through the fulcrum bolt to serve as a fulcrum, and the large knife clip achieves moment balance by using the connecting point of the large knife clip and the rotating clip as a second stress point; the two screw rods are respectively clamped in the grooves at the two ends of the rotating card through the fixed clamping sleeves; clamping the closed clamp on an insulator steel cap, and respectively connecting two ends of the closed clamp with the two lead screws; and tightening the two screw rods to transfer the load on the linear duplex V-string, and replacing the insulator in the linear duplex V-string with the transferred load.
According to the replacing fixture and the replacing method for the linear duplex V-string insulator, provided by the invention, the load on the insulator string is transferred to the reinforced lead screw by utilizing the lever balance principle, so that the replacement of the insulator is realized, the operation is flexible, simple and convenient, and the replacing fixture and the replacing method are safe and reliable, and can be used for greatly improving the replacement efficiency of the insulator, reducing the labor intensity and improving the safe production level, thereby further improving the economic benefit.
Drawings
Fig. 1 is a schematic structural view of a linear duplex V-string insulator replacement fixture according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection structure of the lead screw and the rotary card according to the embodiment of the present invention;
FIG. 3 is a schematic view of the connection structure of the broadsword card and the rotating card according to the embodiment of the present invention;
fig. 4 is a flowchart of a method for replacing a linear duplex V-string insulator according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely in the following description with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As an aspect of the embodiment of the present invention, this embodiment provides a fixture for replacing a linear duplex V-string insulator, and referring to fig. 1, a schematic structural diagram of a fixture for replacing a linear duplex V-string insulator according to an embodiment of the present invention includes: the device comprises a closed clamp 1, two screw rods 2, a large knife clamp 3 and a rotary clamp 4.
Wherein, two ends of the closed card 1 are respectively connected with the same end of the two screw rods 2, and the other ends of the two screw rods 2 are respectively connected with two ends of the rotating card 4; the middle part of the bottom end of the rotating clamp 4 is connected with the top end of the big knife clamp 3, and the rotating clamp 4 and the big knife clamp 3 can rotate relatively; the tail end of the large knife clip 3 is provided with a fixed hook 301 connected with a triangular yoke plate 5, and a fulcrum pin hole 302 vertical to the clip surface of the large knife clip 3 is arranged between the fixed hook 301 and the connection point of the rotating clip 4 and the large knife clip 3 on the large knife clip 3.
One of them embodiment, install right angle link plate 501 on the triangle yoke plate 5, big sword card 3 articulates on right angle link plate 501 through fixed couple 301. A fulcrum bolt is arranged in the fulcrum pin hole 302, and the large knife clip 3 can be clamped on the triangular yoke plate 5 through the fulcrum bolt by utilizing the slope of the triangular yoke plate 5.
Specifically, in the present embodiment, the large blade clamp 3 is made of titanium alloy, the fulcrum bolt is made of SiMn, the other fulcrum bolts are made of LC4, and the working load of the large blade clamp 3 is 7.5T. The weight is not more than 10kg. The rotary clamp 4 is made of titanium alloy and is positioned above the large knife clamp 3, and an operator can operate on a hardware fitting, so that the risk of live working can be reduced. The rotating card 4 weighs no more than 10kg. The screw rod 2 adopts two sets of reinforced screw rods, and the working load is 6T. The closed card 1 adopts titanium alloy, and the weight of the closed card does not exceed 10kg.
The large knife clip 3 is clipped on the triangular yoke plate 5, a top point yoke plate hole is selected on the triangular yoke plate 5 as a first stress point, a right-angle hanging plate 501 is installed at the first stress point, and the large knife clip 3 is hung on the right-angle hanging plate 501 through a fixed hook 301 of the large knife clip 3. A fulcrum bolt is arranged in a fulcrum pin hole 302 on the large knife clamp 3, the large knife clamp 3 is clamped and supported on the slope of the triangular connecting plate 5 through the fulcrum bolt, the acting point of the slope of the triangular connecting plate 5 and the fulcrum bolt on the large knife clamp 3 is taken as a fulcrum, and the connecting point of the large knife clamp 3 and the rotating clamp 4 is taken as a second stress point, so that the large knife clamp 3 achieves moment balance.
The both ends of rotatory card 4 are connected two lead screws 2 with one end respectively, and the other end of two lead screws 2 is connected respectively at the both ends of closed card 1, and closed card 1 clamping is on the steel cap of insulator in the straight line pair V cluster, when tightening up lead screw 2, through two lead screws 2, shifts the load on the insulator chain to rotatory card 4, again by rotatory card 4 through rotatory card 4 with big sword card 3 the junction point shift the load to big sword card 3 on the second stress point. The linear duplex V-shaped string is not under the load action any more, so that the insulators and the hardware fittings in the linear duplex V-shaped string can be conveniently replaced.
When the clamping direction of the closed type card 1 is not in the same plane with the large knife card 3, the rotating card 4 is rotated to enable the rotating card 4, the two screw rods 2 and the closed type card 1 to be in the same plane, then the two screw rods 2 are respectively connected to the two ends of the closed type card 1, the screw rods 2 are tightened, and the effect of transferring the linear duplex V-string load is achieved.
According to the replacing clamp for the linear duplex V-string insulator, provided by the embodiment of the invention, through arranging the rotating clamp 4, the stress direction of the screw rod 2 can be freely adjusted according to the clamping direction of the closed clamp 1, the load transfer can be realized without making the closed clamp 1 and the large knife clamp 3 in the same plane, and the operation difficulty is reduced. Meanwhile, due to the split structure, the detachable and assembled electric car can be detached and assembled, the carrying is convenient, the operation is simple, the safety and the reliability are realized, and the working efficiency can be greatly improved.
The fulcrum pin hole 302 is a row of fulcrum pin holes arranged in parallel with the slope of the triangular yoke plate 5.
Specifically, according to the above embodiment, the fulcrum pin holes 302 provided in the large card knife 3 are arranged in a row, forming a row of fulcrum pin holes. A plurality of fulcrum bolts correspondingly need to be installed, each fulcrum bolt is in a row and is just completely attached to the slope of the triangular connecting plate 5, and the stability of the balance structure is improved.
According to the embodiment of the invention, the rows of the fulcrum pin holes 302 are arranged on the large knife clip 3, so that the slopes of the large knife clip 3 and the triangular connecting plate 5 are better attached, the stability of a balance structure can be improved, and the safety and reliability are improved.
The fulcrum pin hole rows are parallel to each other to adapt to the triangular connecting plates 5 of different models.
Specifically, in the actual transmission lines, the types of the electric power equipment adopted by the transmission lines with different specifications are different, and the types of the triangular yoke plates 5 are different. In order to adapt to the triangular yoke plates 5 of different models, according to the above embodiment, the fulcrum pin holes 302 may be arranged in a plurality of parallel rows of fulcrum pin holes, and different rows of fulcrum pin holes may be selected for different types of the triangular yoke plates 5.
According to the embodiment of the invention, the large knife clip 3 is provided with a plurality of fulcrum pin hole rows, and different fulcrum pin hole rows can be selected according to different types of the triangular yoke plates 5, so that the universality of the insulator replacement tool is improved.
Fig. 2 is a schematic structural diagram of a connection between a screw and a rotating card according to an embodiment of the present invention. In the figure, two ends of the rotating card 4 are provided with grooves 401, corresponding to the grooves 401, the two screw rods 2 are provided with fixed cutting sleeves 201, threaded sleeves 202 are arranged above the fixed cutting sleeves 201, the fixed cutting sleeves 201 are clamped in the grooves 401 to connect the two screw rods 2 with the rotating card 4, and the two screw rods 2 can be tightened by driving the threaded sleeves 202. In one embodiment, a handle is provided on the threaded sleeve 202 for actuating the threaded sleeve 202.
Specifically, the rotary card 4 is provided with one recess 401 at each of both ends. Two lead screws 2 are respectively sleeved with a fixing clamping sleeve 201, the two lead screws 2 can freely move in the fixing clamping sleeve 201, and the fixing clamping sleeve 201 can be a smooth inner wall with the inner diameter slightly larger than the outer diameter of the two lead screws 2 or an inner thread inner wall matched with the threads of the two lead screws 2.
Meanwhile, two threaded sleeves 202 are arranged on the two screw rods 2 above the fixed clamping sleeve 201, two handles are fixedly connected with the two threaded sleeves 202 respectively, and the threaded sleeves 202 can be driven by shaking the handles.
The two screw rods 2 are respectively placed in grooves 401 at two ends of a rotating card 4, the fixing clamping sleeve 201 is clamped through the grooves 401, the two screw rods 2 are connected to two ends of the rotating card 4, and the fixing clamping sleeve 201 is fixed in the grooves 401 through safety buckles. When the handle is shaken to drive the threaded sleeve 202, the two screw rods 2 can move up and down, and when the screw rods 2 move up, the effect of tightening the screw rods 2 is achieved. So that the load on the insulator string can be transferred to replace the insulator.
In the embodiment of the invention, the grooves 401 are arranged at the two ends of the rotating card 4, and the fixed clamping sleeve 201 and the threaded sleeve 202 are correspondingly arranged on the screw rod 2, so that the screw rod 2 and the rotating card 4 are convenient to disassemble and assemble, and are convenient to carry and operate.
Wherein, two the lead screw with the one end that closed card is connected is equipped with the adapter, the adapter is used for the extension the effective length of lead screw is in order to be applicable to the insulator chain of different length.
Particularly, in practical application, because insulator chain's big or small length differs, when insulator length overlength, and the length of lead screw is limited, when unsuitable direct use, can add the adapter in the one end that two lead screws 2 are connected with closed card 1, be connected with closed card 1's both ends respectively with two top adapters that add again to increase lead screw 2's effective length, in order to be applicable to longer insulator chain.
According to the embodiment of the invention, the adapter is additionally arranged at one end of the screw rod 2, so that the effective length of the screw rod can be prolonged, and the linear duplex V-string insulator replacing clamp is suitable for eliminating and overhauling a longer insulator string.
Wherein, two are connected respectively at the both ends of closed card the same one end of lead screw includes: two ends of the closed clamp are respectively hinged to the same ends of the two screw rods.
Particularly, according to the embodiment, the two ends of the closed clamp 1 and the same ends of the two screw rods 2 are respectively provided with corresponding connecting holes, and the two ends of the closed clamp 1 are respectively hinged with the same ends of the two screw rods 2 through the hinge bolts by utilizing the connecting holes at the two ends of the closed clamp 1 and the same ends of the two screw rods 2.
According to the embodiment of the invention, the two ends of the closed clamp 1 and the same end of the two screw rods 2 are provided with the connecting holes, so that the closed clamp 1 is hinged with the two screw rods 2, the operation is simple, and the disassembly and the assembly are convenient.
Referring to fig. 3, a schematic structural diagram of the connection between the big blade card and the rotating card according to the embodiment of the present invention is shown, in which the rotating card 4 and the big blade card 3 are connected through a rotating shaft.
Specifically, according to the above embodiment, the rotating shaft is disposed at the top end of the large blade 3, the groove 402 is correspondingly disposed at the middle of the bottom end of the rotating card 4, the fixing and rotating device corresponding to the rotating shaft is disposed in the groove 402, and the rotating shaft and the fixing and rotating device in the groove 402 are installed in a matching manner, so that the rotating card 4 and the large blade 3 are connected. So that the rotating card 4 and the large knife card 3 can freely rotate.
According to the embodiment of the invention, the rotary shaft connection is arranged between the large tool apron 3 and the rotary clamp 4, so that the rotary clamp 4 and the large tool apron 3 can freely rotate, and the trouble of reworking caused by improper installation direction of the closed clamp is avoided.
As another aspect of the embodiment of the present invention, the embodiment provides a method for replacing a linear duplex V-string insulator based on the fixture, and referring to fig. 4, a flowchart of a method for replacing a linear duplex V-string insulator according to an embodiment of the present invention includes:
s1, the fulcrum bolt is installed in the fulcrum pin shaft hole, the fixed hook is hung on the fixed fulcrum by using the fixed fulcrum on the triangular connecting plate to serve as a first stress point, the large cutter clamp is clamped on a slope of the triangular connecting plate through the fulcrum bolt to serve as a fulcrum, and the large cutter clamp achieves torque balance by taking the connecting point of the large cutter clamp and the rotating clamp as a second stress point.
The step S1 specifically includes clamping the large cutter clamp 3 on a triangular connecting plate 5, selecting a connecting plate hole at the vertex on the triangular connecting plate 5 as a first stress point, installing a right-angle hanging plate 501 at the first stress point, and hanging the large cutter clamp 3 on the right-angle hanging plate 501 through a fixed hook 301 of the large cutter clamp 3. The fulcrum bolt is arranged in the fulcrum pin hole 302 on the large cutter clamp 3, the large cutter clamp 3 is clamped and arranged on the slope of the triangular connecting plate 5 through the fulcrum bolt, the acting point of the slope of the triangular connecting plate 5 and the fulcrum bolt on the large cutter clamp 3 is taken as a fulcrum, and the connecting point of the large cutter clamp 3 and the rotating clamp 4 is taken as a second stress point, so that the large cutter clamp 3 achieves moment balance.
Two lead screws 2 are connected respectively at the two ends of the rotary clamp 4, the other ends of the two lead screws 2 are hinged at the two ends of the closed clamp 1 respectively, the closed clamp 1 is clamped on a steel cap of an insulator in a linear duplex V-shaped string, when the lead screws are tightened, the load on the insulator string is transferred to the rotary clamp 4 through the two lead screws 2, and then the load is transferred to a second stress point of the large knife clamp 3 through the rotary clamp 4 and a connecting point of the large knife clamp 3. The linear duplex V-shaped string is not under the load action any more, so that the insulators and the hardware fittings in the linear duplex V-shaped string can be conveniently replaced.
When the clamping direction of the closed type card 1 and the large knife clamp 3 are not in the same plane, the rotating clamp 4 is rotated to enable the rotating clamp 4 and the closed type card 1 to be in the same plane, then the two screw rods 2 are hinged to the two ends of the closed type card 1 respectively, the screw rods 2 are tightened, and the effect of transferring the linear duplex V-string load is achieved.
And S2, clamping the two screw rods in the grooves at the two ends of the rotating card through the fixing clamping sleeve respectively.
Step S2 is specifically to respectively provide a groove 401 at both ends of the rotating card 4. Two lead screws 2 are respectively sleeved with a fixed clamping sleeve 201, and the two lead screws 2 can freely move in the fixed clamping sleeves 201. Meanwhile, two thread sleeves 202 are arranged on the two screw rods 2 above the fixed clamping sleeve 201.
The two screw rods 2 are respectively placed in grooves 401 at two ends of a rotating card 4, the fixing clamping sleeve 201 is clamped through the grooves 401, the two screw rods 2 are connected to two ends of the rotating card 4, and the fixing clamping sleeve 201 is fixed in the grooves 401 through safety buckles.
And S3, clamping the closed clamp on an insulator steel cap, and respectively connecting two ends of the closed clamp with the two screw rods.
And S3, specifically, selecting an insulator steel cap at the far end of the insulator according to the position of the insulator needing to be replaced in the linear duplex V-string, and clamping the closed clamp 1 on the insulator steel cap at the far end. The direction of the rotating card 4 is adjusted to enable the rotating card 4, the screw rod 2 and the closed card 1 to be in the same plane. Two ends of the closed clamp 1 are respectively connected to the end heads of the two screw rods 2.
And S4, tightening the two screw rods to transfer the load on the linear duplex V string, and replacing the insulators in the linear duplex V string with the transferred load.
Step S4 is specifically to check whether each connection is properly connected after the insulator replacement tool is installed, and after the connection is properly connected, the lead screw 2 is gradually tightened by driving the threaded sleeve 202 to transfer the load on the insulator string until the insulator to be replaced can be freely removed. And then replacing the insulator to be replaced.
According to the method for replacing the linear duplex V-string insulator, provided by the embodiment of the invention, the stress direction of the screw rod is freely adjusted according to the clamping direction of the closed clamp, and the load transfer can be realized without ensuring that the closed clamp and a large knife clamp are clamped in the same plane, so that the operation difficulty can be reduced, the method is safe and reliable, and the working efficiency can be greatly improved.
In summary, according to the fixture for replacing the linear duplex V-string insulator and the replacing method thereof provided by the invention, firstly, the fixture is divided into a plurality of parts, which can be freely disassembled and assembled, and is convenient to carry; and the fixture is made of titanium alloy materials, so that the fixture has the advantages of high strength, light weight, simple operation process and low safety risk in the operation process. Secondly, the fixture and the method only need 4 workers, the operation requirement is low, the workers can master the operation method quickly, the operation is simple, and the working efficiency is high. Thirdly, the fixture and the method can increase the overall economic benefit, which is mainly shown in the following steps: the end insulator and the hardware fitting can be replaced in hot-line work, so that the power failure times can be reduced, the power supply reliability can be improved, and the economic benefit can be increased; secondly, the operation is simple and convenient, the number of operating personnel is small, the working efficiency can be improved, the labor and time cost can be reduced, and the economic benefit can be increased; thirdly, the commonality is better, can reduce the deposit of other multiplexer utensil to the change work of the monolithic of different positions, type and whole cluster insulator, has practiced thrift multiplexer utensil's purchase expense.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled 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.
Claims (10)
1. The utility model provides a change fixture of straight line pair V cluster insulator which characterized in that includes: the device comprises a closed clamp, two screw rods, a large knife clamp and a rotary clamp;
two ends of the closed clamp are respectively connected with the same ends of the two lead screws, and the other ends of the two lead screws are respectively connected with two ends of the rotating clamp;
the middle part of the bottom end of the rotary card is connected with the top end of the large knife card, and the rotary card and the large knife card can rotate relatively;
the tail end of the large knife clip is provided with a fixed hook connected with a triangular yoke plate, and a fulcrum pin hole perpendicular to the surface of the large knife clip is arranged between the fixed hook and the connecting point of the rotary clip and the large knife clip on the large knife clip.
2. The clamp according to claim 1, wherein the triangular yoke plate is provided with a right-angle hanging plate, and the large knife clamp is hung on the right-angle hanging plate through the fixed hook.
3. A clamp according to claim 1, wherein a fulcrum bolt is installed in the fulcrum pin hole, and the large knife clamp can be clamped on the triangular yoke plate through the fulcrum bolt by utilizing the slope of the triangular yoke plate.
4. A clip according to claim 1 or claim 3 in which the fulcrum pin holes are rows of fulcrum pin holes arranged in parallel rows with the slope of the triangular yoke plate.
5. The clamp of claim 4, wherein the rows of fulcrum pin holes are in parallel rows to accommodate different types of triangular yoke plates.
6. A chuck according to claim 3, wherein said rotatable chuck has recesses at opposite ends thereof, and wherein said two lead screws are provided with fixing clips for connecting said two lead screws to said rotatable chuck by clipping said fixing clips in said recesses; and a threaded sleeve is arranged above the fixed clamping sleeve so as to tighten the two screw rods by driving the threaded sleeve.
7. A clamp according to claim 1, wherein the two ends of the closed clamp are respectively connected to the same end of the two lead screws, and the closed clamp comprises:
and two ends of the closed clamp are respectively hinged to the same ends of the two screw rods.
8. A chuck according to claim 1 in which two of said lead screws are provided with adapters at the end thereof for engaging said closed end, said adapters being adapted to extend the effective length of said lead screws to accommodate insulator strings of different lengths.
9. A chuck according to claim 1 in which the rotatable clamp and the large knife are connected by a rotatable shaft.
10. A method for replacing a linear duplex V-string insulator based on the fixture as claimed in claim 6, is characterized by comprising the following steps:
the fulcrum bolt is arranged in the fulcrum pin hole, the fixed hook is hung on the fixed fulcrum by utilizing the fixed fulcrum on the triangular connecting plate to be used as a first stress point, the large knife clamp is clamped on the slope of the triangular connecting plate to be used as a fulcrum through the fulcrum bolt, and the large knife clamp achieves moment balance by taking the connecting point of the large knife clamp and the rotating clamp as a second stress point;
the two screw rods are respectively clamped in the grooves at the two ends of the rotating card through the fixing clamping sleeve;
clamping the closed clamp on an insulator steel cap, and respectively connecting two ends of the closed clamp with the two lead screws;
and tightening the two screw rods to transfer the load on the linear duplex V-string, and replacing the insulator in the linear duplex V-string with the transferred load.
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| CN201710244069.2A CN107342553B (en) | 2017-04-14 | 2017-04-14 | Replacing fixture and replacing method for linear duplex V-string insulator |
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| CN201710244069.2A CN107342553B (en) | 2017-04-14 | 2017-04-14 | Replacing fixture and replacing method for linear duplex V-string insulator |
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| CN107342553A CN107342553A (en) | 2017-11-10 |
| CN107342553B true CN107342553B (en) | 2022-12-02 |
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| CN107706822A (en) * | 2017-11-15 | 2018-02-16 | 国家电网公司 | Equipotential suspension clamp changes instrument |
| CN110601074A (en) * | 2019-10-12 | 2019-12-20 | 国网新疆电力有限公司伊犁供电公司 | Portable wire lifting device |
| CN111952885A (en) * | 2020-09-22 | 2020-11-17 | 中国南方电网有限责任公司超高压输电公司百色局 | Duplex insulator string assembling and disassembling device |
| CN114221254A (en) * | 2021-11-26 | 2022-03-22 | 国家电网有限公司 | Plus or minus 800kV extra-high voltage direct current line four-way connection board card and calculation |
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| CN103227431A (en) * | 2013-03-19 | 2013-07-31 | 国家电网公司 | Method for replacing insulator chains in 220 kV long-span high tower in live working |
| CN203456796U (en) * | 2013-08-15 | 2014-02-26 | 国网浙江省电力公司杭州供电公司 | Broadsword fixture for replacing single insulator of duplex insulator string during power failure |
| CN203456797U (en) * | 2013-08-15 | 2014-02-26 | 国网浙江省电力公司杭州供电公司 | Broadsword fixture for replacing entire string of insulator of duplex insulator string during power failure |
| CN103715633A (en) * | 2014-01-20 | 2014-04-09 | 国家电网公司 | Clamping device and method for replacing single-hole connecting plate strain insulator string |
| CN203690798U (en) * | 2014-01-02 | 2014-07-02 | 国家电网公司 | Universal tool for replacing suspension angle tower insulator string |
| CN105337216A (en) * | 2015-11-26 | 2016-02-17 | 国网河南省电力公司检修公司 | Tool and method for realizing charged replacement of tension insulator of extra-high voltage earth electrode line |
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| CN206727529U (en) * | 2017-04-14 | 2017-12-08 | 国家电网公司 | A kind of replacing fixture of straight line duplex V insulator strings |
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| CN102983529A (en) * | 2012-12-20 | 2013-03-20 | 湖北省电力公司检修分公司 | Replacing tool for quadruple composite tension insulator chains of ultra-high voltage lines |
| CN103227431A (en) * | 2013-03-19 | 2013-07-31 | 国家电网公司 | Method for replacing insulator chains in 220 kV long-span high tower in live working |
| CN203456796U (en) * | 2013-08-15 | 2014-02-26 | 国网浙江省电力公司杭州供电公司 | Broadsword fixture for replacing single insulator of duplex insulator string during power failure |
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| CN203690798U (en) * | 2014-01-02 | 2014-07-02 | 国家电网公司 | Universal tool for replacing suspension angle tower insulator string |
| CN103715633A (en) * | 2014-01-20 | 2014-04-09 | 国家电网公司 | Clamping device and method for replacing single-hole connecting plate strain insulator string |
| CN105337216A (en) * | 2015-11-26 | 2016-02-17 | 国网河南省电力公司检修公司 | Tool and method for realizing charged replacement of tension insulator of extra-high voltage earth electrode line |
| CN205304090U (en) * | 2015-12-22 | 2016-06-08 | 国网福建省电力有限公司泉州供电公司 | Triangle yoke plate fixture and two cluster dead end insulator change device |
| CN206727529U (en) * | 2017-04-14 | 2017-12-08 | 国家电网公司 | A kind of replacing fixture of straight line duplex V insulator strings |
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