CN205070303U - 750kV circuit block of four strain insulator string tip fixture - Google Patents

Abstract

The utility model relates to the technical field of electrical equipment maintenance, in particular to a fixture at the end of a 750kV line quadruple tension insulator string. The utility model comprises a 750kV line quadruple tension end card, two contraction components respectively hinged at both ends of the 750kV line quadruple tension end card, and another 750kV line quadruple strain relief hinged at the other end of the two contraction components. end card. The fixture of the utility model has the advantages of simple structure, convenient and fast operation and high construction efficiency. No matter the replacement of the whole string of insulators or any piece of insulators, the effect of fast, convenient and high efficiency can be achieved.

Description

A 750kV Line Quadruple Tension Insulator String End Fixture

technical field

The utility model relates to the technical field of electrical equipment maintenance, in particular to a fixture at the end of a 750kV line quadruple tension insulator string.

Background technique

The jig is a special tool for replacing insulators (porcelain bottles) during power line maintenance, and the quadruple strain-resistant jig is a tool for replacing quadruple insulator strings in high-voltage transmission lines. Existing quadruple tension clamps consist of one end clamp, the other end clamp at the other end of the two contraction assemblies hinged at both ends of the end clamp, or the front clamp or rear clamp of a closed clamp. During the construction process, the end clamps of this clamp can only be fixedly installed on the right-angled hanging plate bolts of the line fitting plate at one end of the quadruple insulator string and the right-angled hanging plate of the line, or fixedly installed on the connecting plate at the other end and the bowl head hanging plate. Plate attachment screws. In the construction of replacing the quadruple insulator string of 750kV line. When the shrinkage component is tightened, the end clips are easy to be stuck against the line fittings at right angles to the hanging plate or the bowl head hanging plate. Although this defect has little effect on the replacement of the entire string of insulators, it is difficult to replace the single-piece insulators at both ends. Its disadvantages are highlighted when it is used. The right-angle hanging plate or the bowl-head hanging plate can basically not swing, and the insulator is difficult to be removed, making the replacement work particularly difficult.

In view of the current situation of live working tools for 330~500kV AC transmission lines, it is necessary to develop tools suitable for carrying out routine projects of live working on 750kV lines.

Contents of the invention

The technical problem to be solved by the utility model is aimed at the deficiencies of the existing technology. The utility model proposes a four-connection tension clamp suitable for replacing insulators in 750kV lines, whether it is for the replacement of the entire string of insulators or for any of them. The replacement of a piece of insulator can achieve fast, convenient and high-efficiency effects. The end fixture of the 750kV line quadruple tension insulator string.

The utility model is a 750kV line quadruple strain insulator string end fixture through the following technical proposals: a 750kV line quadruple tension insulator string end fixture includes a 750kV line quadruple tension insulator end clamp, The two shrink assemblies hinged at both ends of the 750kV line quadruple tension end card and another 750kV line quadruple tension end card hinged at the other end of the two shrink assemblies, the 750KV quadruple tension end The cross-arm end card and the conductor end card of the internal card have the same structural size. The 750kV line quadruple tension end card includes a hook and a pole. The upper end of the hook is vertically connected with the middle of the pole to form a "T" "" and connected by screws; the front section of the hook is a plate-shaped hook, the upper end surface of the hook is perpendicular to the connecting surface of the pole piece, and the middle of the plate-shaped hook is hollow along the layout to form a hook interval. The rear section of the hook has An inner inclined surface, the top of the hook piece has a pin hole perpendicular to the layout for locking the hook on the connecting plate fittings of the insulator string; the two ends of the pole piece each have a lead screw connection hole for connecting the contraction assembly.

Compared with the prior art, a fixture at the end of a 750kV line quadruple strain-resistant insulator string of the utility model has the following beneficial effects: the hook piece of the clamp end clamp of the utility model is directly connected to the parallel plate of the line fittings, The fitting connecting plate connected with the parallel hanging plate is just inserted into the gap of the hook. The upper inclined surface of the fitting connecting plate coincides with the inner inclined surface of the rear end of the hook and forms a conflict. Use a pin to pass through the pin hole at the top of the hook to lock the hook, and then the fixture The end clip at the other end is installed on the other end fitting of the insulator string according to the above steps, and then tighten the shrinkage components at both ends of the clip. During the tightening process, the inner inclined surface of the hook presses the upper inclined surface of the fitting connecting plate which is in conflict with it, causing the fitting connecting plate to rotate around its connecting screw, and then the insulator string is unloaded and a movable gap is generated. When the activity gap reaches the string unloading requirement, the entire string can be replaced. In the same way, if the end clamp of the utility model clamp is combined with the front clamp or the rear clamp of the existing closed clamp, the single-piece insulator at both ends of the tension insulator string can be replaced.

The fixture of the utility model has the advantages of simple structure, convenient and fast operation and high construction efficiency. No matter the replacement of the whole string of insulators or any piece of insulators, the effect of fast, convenient and high efficiency can be achieved.

Description of drawings

A 750kV line quadruple tension insulator string end clip of the utility model has the following drawings:

Fig. 1 is a schematic diagram of the front view structure of a 750kV line quadruple tension insulator string end clamp line assembly line assembly of the utility model;

Fig. 2 is a top view structural diagram of a 750kV line quadruple tension insulator string end fixture line installation of the utility model;

Fig. 3 is a schematic structural diagram of the main view of a fixture at the end of a 750kV line quadruple tension insulator string of the utility model;

Fig. 4 is a left-view structure schematic diagram of a 750kV line quadruple tension insulator string end fixture of the utility model;

Fig. 5 is a top view structural diagram of a 750kV line quadruple tension insulator string end fixture of the utility model;

Fig. 6 is a schematic diagram of the front structure of a 750kV line quadruple tension insulator string end fixture shoulder pole of the utility model;

Fig. 7 is a top view structure diagram of a 750kV line quadruple tension insulator string end fixture shoulder pole of the utility model;

Fig. 8 is a schematic structural diagram of the front view of the clamp and hook parts at the end of a 750kV line quadruple tension insulator string of the utility model;

Fig. 9 is a top view structure diagram of a 750kV line quadruple tension insulator string end fixture hook piece of the utility model;

Fig. 10 is a right-view structure diagram of a clamp and hook part at the end of a 750kV line quadruple tension insulator string of the utility model.

Among them: 1. 500kV line quadruple tension end clamp; 2. Line fitting plate; 3. Parallel hanging plate; 4. Right angle hanging plate; The first insulator at the end of the four-way tension string wire; 7. The bowl head hanging plate; 8. The screw on the bowl head hanging plate; 9. The rear card of the closed card; 10. The front card of the closed card; 11. The hydraulic screw; 12. Bolts on the right-angle hanging plate; 13. 750kV line quadruple tensile end clamp; 14. Screws; 15. Carrying pole; 16. Hook piece; Hole; 20. Connecting hole of shoulder pole; 21. Connecting hole of hook; 22. Plate hook; 23. Inner slope; 24. Interval between hooks; 25. The second insulator at the cross-arm end; ; 27, insulation rod.

detailed description

The following is a further description of the technical scheme of a 750kV line quadruple tension insulator string end card of the utility model in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1-Fig. 10, a 750kV line quadruple strain insulator string end fixture of the utility model includes 750kV line quadruple strain end clips 13, respectively hinged on the 750kV line quadruple strain end clips Two shrink assemblies at both ends of 13 and another 750kV line quadruple tension end card 13 hinged at the other end of the two shrink assemblies, the cross arm end card and wires of the 750KV quadruple tension end card 13 The structural dimensions of the end cards are the same. The 750kV line quadruple tension end card 13 includes a hook 16 and a pole 15. The upper end of the hook 16 is vertically connected with the middle of the pole 15 to form a "T" shape and passes through The screw 14 is connected as one; the front section of the hook part 16 is a plate-shaped hook 22, and its upper end surface is perpendicular to the connection surface of the shoulder-pole part 15. The middle of the plate-shaped hook 22 is hollow along the layout to form a hook interval 24, and the rear part of the hook part 16 The segment has an inner slope 23, and the top of the hook piece 16 has a pin hole 19 perpendicular to the layout for locking the hook on the connecting plate hardware of the insulator string; Leading screw connecting hole 18.

Further, when replacing the first piece of insulator 5 at the cross-arm end, the quadruple strain-resistant end clip 13 of the 750kV line is installed at the parallel hanging plate 3 at the cross-arm end and the line fitting connecting plate 2, and the hook 22 is hooked on the parallel One end of the hanging plate 3, the lead screw connecting holes 18 at both ends of the pole piece 15 of the 750kV line quadruple tension end clamp 13 are connected with the hydraulic screw 11 through bolts, and the lower end of the hydraulic screw 11 is connected with the front clamp of the closed clamp 10 two ends are connected, and the closed card front card 10 is installed on the second sheet insulator 25 at the cross-arm end.

Further, when replacing the first piece of insulator 6 at the wire end, the quadruple strain-resistant end card 13 of the 750kV line is installed at the parallel hanging plate 3 of the wire end and the connecting plate 2 of the line fittings, and the hook 22 is hooked on the parallel hanging plate 3 One end, 750kV line quadruple tension end card 13 The lead screw connection holes 18 at both ends of the 750kV line quadruple tension end clamp 15 are connected with the hydraulic screw 11 through bolts, and the lower end of the hydraulic screw 11 is connected with the closed clamp rear clamp 9 two The ends are connected, and the closed card rear card 9 is installed on the second sheet insulator 26 at the lead end.

Further, the shrinking assembly includes a hydraulic screw 11 and an insulating pull rod 27 .

Further, the material of the quadruple tension end clamp 13 of the 750kV line is titanium alloy.

Example 1.

As shown in Figure 1-Figure 10, as shown in Figure 1-Figure 10, a 750kV line quadruple strain insulator string end fixture of the utility model includes a 750kV line quadruple tension insulator string end clamp 13, respectively hinged on The two shrink assemblies at both ends of the 750kV line quadruple tension end card 13 and another 750kV line quadruple tension end card 13 hinged at the other end of the two shrink assemblies, the 750KV quadruple tension end The cross-arm end card and the wire end card of the card 13 have the same structural size. The 750kV line quadruple tension-resistant end card 13 includes a hook 16 and a pole 15. The upper end of the hook 16 is connected to the middle of the pole 15. The vertical connection forms a "T" shape, and the screw 14 passes through the hook piece connecting hole 21 on the hook piece 16 and the pole piece connecting hole 20 to connect the hook piece 16 and the pole piece 15 as a whole; as shown in Figure 3-Figure 10; The front part of the hook part 16 is a plate-like hook 22, and its upper end surface is provided with 4 hook part connecting holes 21. The upper end surface of the hook part is perpendicular to the connection surface of the pole part 15, and the middle of the plate-like hook 22 is hollow along the layout to form a hook interval 24. , the rear section of the hook piece 16 has an inner slope 23, and the top of the hook piece 16 has a pin hole 19 perpendicular to the layout for locking the hook on the connecting plate fittings of the insulator string, as shown in Figure 8-Figure 10; Both ends of the shoulder pole 15 respectively have a lead screw connection hole 18 for connecting the contraction assembly. As shown in Figure 6 and Figure 7.

Preferably, the 750kV line quadruple tension end clamp 13 is installed at the parallel hanging plate 3 at the cross arm end and the line fitting connecting plate 2 when replacing the first insulator 5 at the cross arm end, and the hook 22 is hooked on the parallel One end of the hanging plate 3, the lead screw connecting holes 18 at both ends of the shoulder pole piece 15 of the 750kV line quadruple tension end card 13 are connected with the hydraulic screw 11 through bolts, and the lower end of the hydraulic screw 11 is connected with the insulating pull rod 27. The two ends of the front card 10 of the closed card are connected, and the front card 10 of the closed card is installed on the second sheet insulator 25 at the cross-arm end. As shown in Figure 1 and Figure 2.

Preferably, when replacing the first piece of insulator 6 at the wire end, the quadruple tension end clamp 13 of the 750kV line is installed at the parallel hanging plate 3 of the wire end and the line fitting connecting plate 2, and the hook 22 is hooked on the parallel hanging plate 3 One end, 750kV line quadruple tension end card 13 The lead screw connecting holes 18 at both ends of the shoulder piece 15 are connected to the hydraulic lead screw 11 through bolts, and the lower end of the hydraulic lead screw 11 is connected with the insulating rod (6) The closed card back card 9 two ends are connected, and the closed card back card 9 is installed on the second sheet insulator 26 of the wire end. As shown in Figure 1 and Figure 2.

Preferably, the shrinking assembly includes a hydraulic screw 11 and an insulating pull rod 27 . as shown in picture 2.

Preferably, the material of the quadruple tension end clamp 13 of the 750kV line is titanium alloy.

In order to solve the problem that the original fixture is stuck against the right-angle hanging plate 4 (Z-32G) or the bowl-head hanging plate 7 (WS-3224G) during use, the right-angle hanging plate 4 (Z-32G) or the bowl-head hanging plate 7 (WS-3224G) The insulator cannot be replaced because it cannot swing freely. On the basis of summarizing the design and manufacturing technology of the existing clamps, the 750KV quadruple tension end clamps of the utility model are not compatible with the right-angle hanging plate 4 (Z-32G) or the bowl head hanging plate 7 (WS- 3224G) connection, the insulator can be easily disengaged from the line fittings to achieve the purpose of replacement.

The structural dimensions of the cross-arm end card and the wire end card of the 750KV quadruple tension end card 13 are the same. Fixtures are installed at the parallel hanging plate 3 (P-64G) and connecting plate 2 (L-6455G) at the cross-arm end and wire end, and the quadruple tensile end clamp 13 is matched with the front 10 and rear clamp 9 of the closed clamp for replacement The first insulators 5 and 6 at the cross-arm and conductor ends.

As shown in Fig. 1-Fig. 2, it is a schematic diagram of assembling the 750kV line quadruple tension end card line of the utility model. When the quadruple tension end card 13 of the 750kV line is installed at the cross arm end of the quadruple tension insulator string, cooperate with the closed card front card 10 to replace the first insulator 5 at the cross arm end of the quadruple tension string. The quadruple tensile end clamp 13 is installed on the connection plate 2 (L-6455G) and the parallel hanging plate 3 (P-64G), and is connected with the closed clamp front clamp 10 through the hydraulic screw 11 to form a load transfer system. First pre-tighten the hydraulic lead screw 11 to ensure that the fixture is installed correctly, then tighten the hydraulic lead screw 11 to transfer the load of the insulator string to the fixture and the hydraulic lead screw, thereby completing the replacement of the insulator 5 . When replacing the first piece of insulator 6 at the end of the wire with the rear clamp 9 of the closed clamp, the clamp 13 is still installed at the connecting plate 2 (L-6455G) and the parallel hanging plate 3 (P-64G). The operation method is the same as that of the cross arm end. same.

The 750kV line quadruple tension-resistant end clamp of the utility model is shown in FIG. 4 , and is mainly composed of a shoulder pole 15 and a hook 16 . During use, first the shoulder pole piece 15 and the hook piece 16 are assembled by 4 screws 14, and the hook interval 24 provided by the plate-shaped hook 22 of the hook piece 16 is stuck on both sides of the parallel connecting plate 2 of the line fittings, and its inner slope 23 is aligned with the line. A slope of the parallel connecting plate 2 of the fittings coincides; the pin 17 is not installed on the main body Ⅰ temporarily, and the clamp 13 at the end of the 750kV line quadruple tension is on the line fittings connecting plate 2 (L-6455G) and the parallel hanging plate 3 (P -64G) after the installation is completed, then the pin 17 is installed on the hook 16, and the pin 17 plays the role of protecting the 750kV line quadruple tension end clamp 13 from shaking. The fixture does not contact the line fittings connected with the insulator during use, so the insulator can be replaced conveniently and quickly.

The utility model designs that the hook piece at the end of the fixture is directly hooked on the parallel plate of the line fittings, and the fittings connecting plate connected with the parallel hanging plate is just inserted into the gap of the hook. Anastomose and form a conflict, lock the hook with a pin through the pin hole at the top of the hook, then install the end clip at the other end of the fixture on the other end of the insulator string according to the above steps, and then tighten the shrinkage components at both ends of the fixture . During the tightening process, the inner inclined surface of the hook presses the upper inclined surface of the fitting connecting plate which is in conflict with it, so that the fitting connecting plate rotates around its connecting screw rod, and then the insulator string is unloaded and a movable gap is generated. When the activity gap reaches the string unloading requirement, the entire string can be replaced. In the same way, if the end clamp of the utility model clamp is combined with the front clamp or the rear clamp of the existing closed clamp, the replacement of the single-piece insulators at both ends of the tension insulator string can be implemented.

750kV line quadruple tensile end card consists of main body II15 and main body I16. When in use, firstly assemble the main body II15 and the main body I16 through four screws 14, the pin 17 is not installed on the main body I temporarily, and the fixture is installed on the line fitting connecting plate 2 (L-6455G) and the parallel hanging plate 3 (P -64G) place, then wear the pin 17 on the main body I, and the wear pin 17 plays a protective role.

When the quadruple tension end card 13 of the 750kV line is installed at the cross arm end of the quadruple tension insulator string, cooperate with the closed card front card 10 to replace the first insulator 5 at the cross arm end of the quadruple tension string. The quadruple tensile end clamps 13 are installed on the connection plate 2 (L-6455G) and the parallel hanging plate 3 (P-64G), and are connected with the closed clamp front clamp 10 through the screw 11 to form a load transfer system. First pre-tighten the lead screw 11 to ensure that the fixture is installed correctly, then tighten the lead screw 11 to transfer the load of the insulator string to the fixture and the lead screw, thereby completing the replacement of the insulator 5 . When replacing the first piece of insulator 6 at the end of the wire with the rear clamp 9 of the closed clamp, the clamp 13 is still installed at the connecting plate 2 (L-6455G) and the parallel hanging plate 3 (P-64G). The operation method is the same as that of the cross arm end. same.

The fixture of the present invention does not contact the line fittings connected with the insulator during use, so the insulator can be replaced conveniently and quickly.

Claims (5)

1. a 750kV circuit transposing strain four insulators chain end chucking appliance, comprise 750kV circuit tetrad strain insulator end card (13), another 750kV circuit tetrad strain insulator end card (13) of two retraction assemblies being hinged on card (13) two ends, 750kV circuit tetrad strain insulator end respectively and the other end being hinged on two retraction assemblies, it is characterized in that: the cross-arm-end card of described 750KV tetrad strain insulator end card (13) is identical with the physical dimension of conductor wire end card, described 750kV circuit tetrad strain insulator end card (13) comprises hook member (16) and shoulder pole part (15), described hook member (16) upper end is vertical with shoulder pole part (15) middle part to be connected to form " T " font and to be connected as one by screw (14), the leading portion of described hook member (16) is tabular hook (22), its upper surface is vertical with the joint face of shoulder pole part (15), the centre of tabular hook (22) forms hook interval (24) along space of a whole page hollow, the back segment of hook member (16) has an interior inclined-plane (23), and the top of hook member (16) has one perpendicular to the pin-and-hole on yoke plate gold utensil hook look being fixed on insulator string (19) of the space of a whole page, respectively there is a leading screw connecting hole (18) connecting retraction assemblies at the two ends of described shoulder pole part (15).

2. 750kV circuit transposing strain four insulators chain end chucking appliance according to claim 1, it is characterized in that: when described 750kV circuit tetrad strain insulator end card (13) changes cross-arm-end first insulator (5), be arranged on the parallel link plate (3) of cross-arm-end and line hardware yoke plate (2) place, described hook (22) is hooked in parallel link plate (3) end, the leading screw connecting hole (18) at shoulder pole part (15) both ends of 750kV circuit tetrad strain insulator end card (13) is connected with hydraulic screw rod (11) by bolt, block (10) both ends before hydraulic screw rod (11) bottom and closed fixture to be connected, before closed fixture, card (10) is arranged on cross-arm-end second insulator (25).

3. 750kV circuit transposing strain four insulators chain end chucking appliance according to claim 1, it is characterized in that: time described 750kV circuit tetrad strain insulator end card (13) restringing end first insulator (6), be arranged on the parallel link plate of conductor wire end (3) and line hardware yoke plate (2) place, described hook (22) is hooked in parallel link plate (3) end, the leading screw connecting hole (18) at shoulder pole part (15) both ends of 750kV circuit tetrad strain insulator end card (13) is connected with hydraulic screw rod (11) by bolt, hydraulic screw rod (11) bottom with block (9) both ends after closed fixture and be connected, block (9) after closed fixture to be arranged on conductor wire end second insulator (26).

4. 750kV circuit transposing strain four insulators chain end chucking appliance according to claim 1, is characterized in that: described retraction assemblies comprises hydraulic screw rod (11) and insulation pull-rod (27).

5. 750kV circuit transposing strain four insulators chain end chucking appliance according to claim 1, is characterized in that: the material of described 750kV circuit tetrad strain insulator end card (13) is titanium alloy.