CN206673450U - The general service kit in extra-high voltage strain insulator wire side end - Google Patents

Abstract

The utility model provides a general overhaul tool for the side ends of UHV strain insulator wires, which comprises an insulator closed clamp, a clamp rod and an extension rod; The two ends of the lower card are connected so that the clamping rod, the insulator closed lower card and the extension rod form a door shape; the other end of the clamping rod and the other end of the extension rod are equipped with a hydraulic screw tensioner for connection The through hole; the clamping rod includes two upper and lower clamping sub-rods for clamping the end hanging wire connecting plate, and an elastic adjustment mechanism is arranged between the two clamping sub-rods. The utility model can be applied to all hanging wire connecting plates at the ends, realizes the general purpose and saves cost at the same time.

Description

General inspection tool for UHV tension insulator conductor side end

technical field

The utility model belongs to the field of overhauling of extra-high voltage transmission lines, in particular to a universal overhauling tool for the side ends of conductors of extra-high voltage strain insulators.

Background technique

The 1000kV AC UHV test demonstration transmission line Nanjing Line I has been in operation for more than 8 years, and a number of maintenance work has been carried out during the operation and maintenance work. Compared with the 500kV transmission line, the design and structure of the UHV line have changed significantly, the components have increased significantly, and the tonnage of the load-bearing tools is large. It is necessary to re-develop some maintenance processes and tools with new ideas to ensure safety. , Complete maintenance work efficiently.

For example, there are mature hydraulic screw rods + titanium alloy closed clamps that can be used for the single-piece replacement of the horizontal insulator string of the strain tower, but there is no general-purpose end tool for replacing the end insulators on the wire side. Chinese patent CN102545102A discloses a 1000kV tension-resistant horizontal insulator live replacement device. The front end card provided uses titanium alloy upper and lower plates. Bolt connection fastened combination. However, because there are many kinds of the end hanging wire connecting plate in one line, the size and position of the reserved holes on it are all different, and different front end cards need to be made in cooperation, which cannot realize the general purpose.

Utility model content

The technical problem to be solved by the utility model is: to provide a general inspection tool for the side ends of UHV strain insulator wires, which can be applied to all end hanging wire connecting plates, so as to realize the general purpose and save costs at the same time.

The technical scheme adopted by the utility model to solve the above technical problems is: a universal overhaul tool for UHV strain insulators, characterized in that it includes an insulator closed clamping card, a clamping rod and an extension rod; the clamping rod One end and one end of the extension rod are respectively connected with the two ends of the insulator closed card lower card, so that the clamping rod, the insulator closed card lower card and the extension rod form a door shape; the other end of the clamping rod and the other end of the extension rod are both There is a through hole for connecting with the hydraulic screw tensioner;

The clamping rod includes two upper and lower clamping sub-rods for clamping the end hanging wire connecting plate, and a tightness adjustment mechanism is arranged between the two clamping sub-rods.

According to the above scheme, the inner side of the lower card of the insulator closed type card is provided with a positioning groove for snapping into the two connecting plates connected with the end hanging wire connecting plate; the inner side of the lower card of the insulator closed type card is located at the same side.

According to the above solution, the tightness adjusting mechanism is an adjusting nut.

According to the above scheme, the lengths of the clamping rod and the extension rod are equal.

The operation method of the universal overhaul tool for UHV tension insulators is characterized in that it includes the following steps:

S1. Preparation: Clean up the connecting plate and the second connecting plate at the end; lift the general maintenance tool for the UHV tension insulator to a suitable position;

S2. Installation: use two clamping sub-rods to clamp the end hanging wire connecting plate, and the insulator closed card lower card is against the second connecting plate, and clamped by the elastic adjustment mechanism to make the clamping rod and the end hanging wire The connecting plate is relatively fixed; the other end of the clamping rod and the other end of the extension rod are respectively connected with a hydraulic screw tensioner.

According to the above operation method, in the above S1, if there is a pressure equalizing ring installation rod on the second connecting plate, remove the pressure equalization ring installation rod.

According to the above operation method, the inner side of the lower card of the insulator closed card is provided with a positioning groove for snapping in the two connecting plates connected with the end hanging line connecting plates;

In the above S2, the two-piece board is snapped into the positioning groove.

The beneficial effects of the utility model are:

1. By adopting the same structure as the lower card of the existing insulator closed card as the end card, and clamping and fixing the end hanging wire connecting plate by the clamping rod, because all the end hanging wire connecting plates have the same shape Therefore, the device of the utility model can be applied to all end-hanging connecting plates to achieve a general purpose; compared with the existing connection method, its force-bearing section is increased, which improves the force-bearing effect; at the same time It only needs to configure another set of clamping rods and extension rods, which reduces the types and quantities of tools for the maintenance team, and the insulator closed clamp itself can be used as an ordinary insulator closed clamp, realizing a The purpose of dual-use, saving costs.

2. By setting up a positioning groove on the inner side of the lower card of the insulator closed card, it can be more firmly matched with the double plate and play an anti-skid role.

Description of drawings

Fig. 1 is a schematic view of the structure of an embodiment of the utility model in use.

Fig. 2 is a view along the direction A of Fig. 1 .

Fig. 3 is a view taken along direction B of Fig. 1 .

Fig. 4 is a view from the direction C of Fig. 1 .

Fig. 5 is a schematic diagram of installation of an embodiment of the utility model.

In the figure: 1-Insulator closed card lower card, 1-1-Positioning slot, 2-Clamping rod, 2-1-Through hole, 2-2-Clamping sub-rod, 3-Extension rod, 3-1-Through Hole, 4-end hanging wire connecting plate, 5-two connecting plate, 6-insulator, 7-lead wire, 8-elasticity adjustment mechanism, 9-hydraulic screw rod tensioner, 10-insulator closed clamping card.

detailed description

Below in conjunction with specific example and accompanying drawing, the utility model is further described.

As shown in Figures 1 to 5, on the UHV tension tower, the horizontal insulator string of the tension tower composed of insulators 6 is connected to the wire 7 through the end hanging wire connecting plate 4 and the double connecting plate 5, and each insulator 6 All need to withstand a certain force, and if you want to replace a certain insulator 6, you must replace the insulator to be replaced with other parts to bear a certain force. The utility model provides a general overhaul tool for UHV strain insulators, which includes an insulator closed clamping card 1, a clamping rod 2 and an extension rod 3; one end of the clamping rod 2 and one end of the extension rod 3 are respectively closed with the insulator. The two ends of the card lower card 1 are connected so that the clamping rod 2, the insulator closed card lower card 1 and the extension rod 3 form a door shape; the other end of the clamping rod 2 and the other end of the extension rod 3 are provided with The through holes 2-1 and 3-1 connected by the hydraulic screw tensioner 9; the clamping rod 2 includes two upper and lower clamping sub-rods 2-2 for clamping the end hanging wire connecting plate 4, two A tightness adjustment mechanism 8 is arranged between the sheet clamping sub-rods 2-2.

Preferably, the inner side of the insulator closed card lower card 1 is provided with a positioning groove 1-1 for snapping into the two connecting plates 5 connected to the end hanging line connecting plate 4; the inner side of the insulator closed card lower card 1 and the extension rod 3 and clamping rod 2 are located on the same side.

Further preferably, the tightness adjusting mechanism 8 is an adjusting nut.

In this embodiment, the lengths of the clamping rod 2 and the extension rod 3 are equal.

The operation method of the general overhaul tool for UHV tensile insulators includes the following steps:

S1. Preparation: Clean up the connecting plate 4 and the second connecting plate 5 at the end; lift the general maintenance tool for UHV tension insulators to a suitable position; Remove the pressure equalizing ring mounting rod.

S2. Installation: Use two clamping sub-rods 2-2 to clamp the end hanging line connecting plate 4, and the insulator closed card lower card 1 and the second connecting plate 5 are against each other, and the elastic adjustment mechanism 8 is clamped to make the clamping The holding rod 2 is relatively fixed with the end hanging wire connecting plate 4; the other end of the clamping rod 2 and the other end of the extension rod 3 are respectively connected with a hydraulic screw thread tensioner 9.

The inner side of the insulator closed card lower card 1 is provided with a positioning groove 1-1 for snapping in the two-joint plate 5 connected to the end hanging line joint plate 4; In the positioning groove 1-1, since the two-joint plate 5 and the lower card 1 of the closed insulator are perpendicular to each other, adding the positioning groove 1-1 can play an anti-slip effect.

The insulator replacement method implemented by using the UHV tensile insulator universal maintenance tool includes the following steps:

S1. Preparation: Clean up the end-hanging connecting plate 4 and the second connecting plate 5; lift the above-mentioned UHV tension insulator universal maintenance tool, hydraulic screw tensioner and the upper clamp of the insulator closed clamp to a suitable position; If there is a pressure equalizing ring installation rod on the second connecting plate 5, then the pressure equalization ring installation rod is dismantled.

S2, installation: as shown in Figure 5,

Conductor side: Use two clamping sub-rods 2-2 to clamp the end hanging wire connecting plate 4, and the closed clamping card 1 of the insulator is against the second connecting plate 5, and is clamped by the elastic adjustment mechanism 8 so that the clamping The rod 2 is relatively fixed to the end hooking plate 4; the other end of the clamping rod 2 and the other end of the extension rod 3 are respectively connected to the hydraulic screw tensioner 9;

On the insulator side: clamp the insulator closed card upper card 10 to the insulator adjacent to the wire side of the insulator to be replaced, and connect the two ends of the insulator closed card upper card 10 to the hydraulic screw tensioner 9 respectively;

The inner side of the insulator closed card lower card 1 is provided with a positioning groove 1-1 for snapping in the two-joint plate 5 connected to the end hanging line joint plate 4; In the positioning slot 1-1.

S3. Replacement of insulators: the insulator closed clamping card 10, the hydraulic screw tensioner 9 and the UHV tension insulator general maintenance tool form a frame shape, and the hydraulic screw tensioner 9 can be tightened, and the replacement can be shared The force of the insulator, until the insulator to be replaced is loose and can be removed, stop tightening the wire, remove the insulator to be replaced, and replace it with a new insulator;

S4. Disassembly: Loosen the hydraulic screw tensioner 9, restore the normal force on the wire, remove the hydraulic screw tensioner 9, the insulator closed card upper card 10 and the general maintenance tool for UHV tension insulators and drop them to the ground .

Taking Nanjing Line I of the 1000kV AC UHV test demonstration transmission line as an example, the stress structure of horizontal double-string insulators is adopted, and the trapezoidal end hanging connection plate is used on the conductor side to connect 4 triangles with 2 conductors each, forming 8 Tension wire for splitting conductors. The side of the tower is connected with insulator strings by U-shaped bolts + adjustment plate + adjustment plate + traction plate. The AC UHV transmission line of Nanjing Line I uses 8x500 split conductor structure, and the tension of the tension tower hanging wire is 22T when corresponding to the average operating stress. Considering a certain margin coefficient, it is reasonable to carry out reduction and related mechanical calculations based on 24 tons Yes, acceptable. The average stress of two strings of tension insulators is considered to be 12T to make corresponding load-bearing transfer tools, and the utility model is fully applicable.

The horizontal series insulators of the strain tower are 55T glass insulators, the model is U550B/240T, the diameter of the shed is 375mm, and the distance between the two series of insulators is 600mm, so the space between the two series is 225mm, which can be used to install the hydraulic screw tensioner. Using the insulator closed card lower card 1 as the end card, so that under the premise that the strength can be guaranteed, the end card can be used as an ordinary insulator closed card lower card 1 at the same time, realizing the purpose of one thing with two purposes, reducing Kind of tool. Simply put, it is to open a positioning anti-skid groove at the corresponding position on the top surface of the lower card 1 of the insulator closed card, and use it as an end card. According to the calculation of mechanical mechanics, because the slotting position is not symmetrical, and the strength of the end card is reduced after slotting, it must be strengthened accordingly. The method is to increase the cross-section of the positioning groove 1-1 under the premise that the structural height of the lower card 1 of the insulator closed card remains unchanged, and improve its bending strength. In addition, the clamping rod 2 adopts the method of clamping the two connecting plates 5 with double sides, which can ensure that the lower card 1 of the insulator closed card and the upper card 10 of the insulator closed card are stressed on the same plane.

It can be seen from the above description that the end card borrows the basic structure of the ordinary insulator closed card lower card, and is fixed on the two two-piece boards on which the wires are hooked. Through the extension rod 3 and the hydraulic screw tensioner 9 And insulator closed card upper card 10 connection supporting use, carry out end insulator replacement, maintenance. Compared with the ordinary insulator closed clamping clamp, its force cross section has been enlarged. When arranging the end cards, any one of the inner and outer strings, the joint structure of the wire side is mirror-symmetrical, so when using it on the other side, it is only necessary to horizontally rotate the end cards by 180 degrees to arrange them. Obviously, because of the fixed position of this type of end clamp, it is universal in the whole line of the line, and because it is based on the structure of the common insulator closed clamp, it can also be used as a common insulator closed clamp, reducing the The types and quantities of tools configured by the maintenance team realize the purpose of one thing with two uses.

The above embodiments are only used to illustrate the design concept and characteristics of the present utility model, and its purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. The protection scope of the present utility model is not limited to the above-mentioned embodiments. Therefore, all equivalent changes or modifications based on the principles and design ideas disclosed in the present utility model are within the protection scope of the present utility model.

Claims (4)

1. A general overhaul tool for the side ends of UHV strain insulator wires, characterized in that: it includes an insulator closed clamping card, a clamping rod and an extension rod; one end of the clamping rod and one end of the extension rod are respectively connected to the insulator The two ends of the closed card lower card are connected so that the clamping rod, the insulator closed card lower card and the extension rod form a door shape; The through hole for the device connection; The clamping rod includes two upper and lower clamping sub-rods for clamping the end hanging wire connecting plate, and a tightness adjustment mechanism is arranged between the two clamping sub-rods. 2. The universal overhaul tool for the side ends of UHV strain insulator wires according to claim 1, characterized in that: the inner side of the lower card of the insulator closed type card is provided with a two-piece for clamping and connecting with the end hanging wire connecting plate. Positioning slot for the board; the inner side of the lower card of the insulator closed card is on the same side as the extension bar and the clamping bar. 3. The universal overhaul tool for the wire side ends of UHV tension insulators according to claim 1, characterized in that: said tightness adjusting mechanism is an adjusting nut. 4. The universal overhaul tool for the wire side ends of UHV tension insulators according to claim 1, characterized in that the lengths of the clamping rod and the extension rod are equal.