CN215007738U - Complete device for replacing direct-current 550kN glass insulator clamp - Google Patents

Abstract

The utility model belongs to the technical field of the glass insulator overhauls and maintains, in particular to change direct current 550kN glass insulator fixture integrated equipment, a serial communication port, connect including last pocket card, push down the card, tighten up the lead screw and extension, go up the pocket card and press down the structure of card similar, go up the pocket card or press down including cassette, card cover, ring ear bolt and nut in the card and constitute, be equipped with the excessive fit clearance m of certain width between cassette and the card cover. The utility model has the advantages that: 1) the excessive fit clearance between the upper pocket clamp and the lower pressing clamp solves the problems of poor adaptability and potential safety hazard of the existing glass insulator clamp; 2) the single-side opening type clamping apparatus structure is adopted, so that the convenience of operation is improved, and the efficiency of replacing the insulator is improved; 3) the fitting surface intensity of fixture has been increased to the steel snap ring, and convenient the change when glass insulator specification has great change, removable snap ring has solved the problem that fixture can not the adaptation.

Description

Complete device for replacing direct-current 550kN glass insulator clamp

Technical Field

The utility model belongs to the technical field of the glass insulator overhauls and maintains, in particular to change direct current 550kN glass insulator fixture integrated equipment.

Background

In the field of power transmission, a device for supporting and insulating a wire of an overhead transmission line is called an insulator, and an insulator made of glass is a glass insulator, and is widely used in power transmission lines. The glass insulator generally comprises a glass body, wherein two ends of the glass body are respectively provided with an iron cap and a steel pin, the iron cap on one glass insulator can be fixedly connected with the steel pin on the other glass insulator, and therefore a plurality of glass insulators are sequentially connected into a string, namely an insulator string. The glass insulator may be damaged and self-exploded during use, which may seriously affect the normal operation of the power system. The damaged glass insulator must be replaced, but generally, instruments or spans are installed below the wires, so that it is difficult for an operator to detach the whole string of glass insulators and place the glass insulators on the ground for replacement.

The insulator is fixed through upper and lower fixture to current glass insulator fixture, the rethread lead screw supports, this kind of clamping structure only possesses middle lead screw single-point support, stability is relatively poor, and, because the insulator place of production model specification is different, the diameter size of steel cap is also different, iron hat boss angle size also has slight difference, consequently, lead to the suitability of fixture relatively poor, when disassembling the pulling force when too big, the iron hat probably deviates from the fixture, bring the hidden danger for high altitude construction personnel's personal safety, split type fixture makes high altitude construction inconvenient in addition, these all influence the efficiency of changing the insulator.

Disclosure of Invention

The utility model aims at providing a change direct current 550kN glass insulator fixture integrated equipment overcomes prior art's is not enough, adopts unilateral open type fixture structure, improves the convenience of operation, and an excessive fit clearance is predetermine to anchor clamps, when there is slight difference in iron hat boss angular dimension, can provide bigger centre gripping space, prevents to deviate from, solves the problem that current glass insulator fixture suitability is poor, there is the potential safety hazard, improves the efficiency of changing the insulator.

In order to achieve the above object, the utility model discloses a following technical scheme realizes:

the complete device for replacing the direct-current 550kN glass insulator clamp is characterized by comprising an upper pocket clamp, a lower pressing clamp, a tightening screw rod and an extension joint, wherein the upper pocket clamp and the lower pressing clamp are similar in structure and are respectively matched, clamped and positioned with steel caps of two glass insulators on a glass insulator string, and the upper pocket clamp and the lower pressing clamp are connected through two groups of extension joints and the tightening screw rod to form a rectangular bearing structure; the upper pocket clamp or the lower pressing clamp comprises a clamp seat, a clamp cover, a ring lug bolt and a nut, the left side and the right side of the clamp seat extend outwards to form lug plates, connecting holes for connecting an extension joint or tightening a screw rod are formed in the lug plates, the ring lug bolts are symmetrically assembled on the clamp seat from left to right, a central hole for accommodating a steel cap is formed in the middle of the clamp seat and the clamp cover after the clamp seat is combined with the clamp cover, and the inner surface of the central hole is matched with a boss matching section of the steel cap; an excessive fit clearance m with a certain width is arranged between the clamping seat and the clamping cover.

Furthermore, a steel snap ring is embedded on the matching section of the inner surface of the central hole and the boss of the steel cap.

Further, the width of the excessive fit clearance m is 2-6 mm.

Further, an offset L is arranged between the excessive fit clearance m and the center of the center hole, the offset value is 8-12mm, and the center hole corresponding to the clamping seat is an optimal arc.

Furthermore, the clamping cover is provided with mounting holes matched with the ring lug bolts, one of the mounting holes is a long round hole, and the other mounting hole is an open hole.

Further, the ratio of the length to the width of the long round hole is 1.25-2: 1.

Furthermore, the tightening screw rod is a gear labor-saving tightening screw rod or a mechanical ratchet wheel tightening screw rod.

Compared with the prior art, the beneficial effects of the utility model are that: 1) an excessive fit clearance is preset between the clamping seat and the clamping cover, so that a larger clamping space can be provided when the angle size of the boss of the iron cap has slight difference, accidental separation is prevented, and the problems of poor adaptability and potential safety hazard of the conventional glass insulator clamping apparatus are solved; 2) the clamping cover structure with the opening on one side is adopted, so that the clamping cover does not need to be completely removed during operation, the convenience of operation is improved, and the efficiency of replacing the insulator is improved; 3) the fitting surface intensity of fixture has been increased to the steel snap ring, and wear resistance is higher than the aluminum alloy material of fixture body, and convenient the change simultaneously, when glass insulator specification had great change, removable snap ring has solved at present because insulator place of production model specification is different, the problem that fixture can not the adaptation.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of an upper pocket clip structure in the embodiment of the present invention, and the structure of a lower pressing clip is similar and will not be described again;

FIG. 3 is a top view of FIG. 2;

fig. 4 is a sectional view taken along line a-a of fig. 2.

In the figure: 1-a card seat; 2-ear plate; 3-clamping the cover; 4-lug bolts; 5-a nut; 6-a snap ring; 7-a screw; 8-long round holes; 9-tightening the screw rod; 10-an extension linker; 11-a glass insulator; 12-pressing the card down; and 13, mounting a pocket card.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

See fig. 1-fig. 3, which are schematic structural views of an embodiment of the complete device for replacing a direct current 550kN glass insulator fixture of the present invention, including an upper pocket card 13, a lower pressing card 12, a tightening screw 9 and an extension joint 10, wherein the upper pocket card 13 and the lower pressing card 12 have similar structures, and are respectively matched with steel caps of two glass insulators 11 on a glass insulator string for clamping and positioning, and a rectangular bearing structure is formed by connecting two sets of extension joints 10 and tightening screws 9 between the upper pocket card 13 and the lower pressing card 12; the upper pocket clamp 13 or the lower pressing clamp 12 comprises a clamp seat 1, a clamp cover 3, a ring lug bolt 4 and a nut 5, the left side and the right side of the clamp seat 1 extend outwards to form a lug plate 2, the lug plate 2 is provided with a connecting hole for connecting an extension joint 10 or a tightening screw 9, the clamp seat 1 is symmetrically provided with the ring lug bolt 4 from left to right, after the clamp seat 1 and the clamp cover 3 are combined through the ring lug bolt 4 and the nut 5, a central hole for accommodating a steel cap is formed in the middle, and the inner surface shape of the central hole is matched with a boss matching section of the steel cap; an excessive fit clearance m with a certain width is arranged between the card holder 1 and the card cover 3. The width of the over-fitting clearance m is 4 mm. Excessive fit clearance m is provided with offset L with the centre bore center, and the offset value is 10mm, and the centre bore that corresponds cassette 1 is the major arc, improves the cooperation stability. Excessive fit clearance m makes the contact clearance of fixture and glass insulator steel cap boss littleer, and area of contact is bigger, and the pulling force of production is bigger, can effectively prevent to deviate from after the afterburning to the fail safe nature of use has been guaranteed.

In order to prolong the service life of the fixture, a steel snap ring 6 is embedded on the inner surface of the central hole and the matching section of the steel cap boss through a screw 7, the strength of the matching surface of the fixture is increased by the steel snap ring, and the wear resistance of the aluminum alloy material is higher than that of the fixture body. Because the insulator caps are different in size in each production, the snap ring 6 must be matched with the insulator caps for use.

The clamping cover 3 is provided with mounting holes matched with the ring lug bolts 4, one of the mounting holes is a long round hole 8, and the other mounting hole is an open hole. The ratio of the length to the width of the oblong hole 8 is preferably 1.25-2:1, preferably 1.8: 1. when the nut 5 is loosened, the ring bolt 4 in the long round hole 8 can be properly inclined, so that the clamping cover 3 is opened and sleeved on the steel cap of the glass insulator 11 without being completely detached.

Tighten up lead screw 9 and tighten up the lead screw for mechanical type straight line turn-buckle or mechanical type ratchet, all can realize the utility model discloses a technical purpose. The utility model discloses change direct current 550kN glass insulator fixture complete sets embodiment and allow to use load 140kN, tighten up the adjustment length of lead screw 9 and be 600mm-800mm, the biggest permission uses the insulator dish footpath to be 360 mm. The voltage class is suitable for the occasions of alternating current 500kV-1000kV and direct current +/-500 kV-1100 kV.

The utility model discloses change direct current 550kN glass insulator fixture integrated equipment's application method as follows:

1) firstly, respectively installing an upper clamp (an upper pocket clamp 13) of an insulator steel cap and a lower clamp (a lower pressing clamp 12) of the insulator steel cap on a steel cap of an insulator spacer-sheet insulator to be replaced, and installing and fastening the upper clamp and the lower clamp; then respectively connecting the extension joint 10 and the tightening screw rod 9 (in the embodiment, a gear labor-saving tightening screw rod is selected) to the upper pocket clamp 13 and the lower pressing clamp 12, and fastening the nut 5;

2) the lead screw 9 is tightened by rotating a ratchet wrench tool to bear force, the force is gradually transferred to the upper pocket clamp 13 and the lower pressing clamp 12, and the states of all parts of the clamp are observed in the operation process;

3) the tightening screw 9 is further operated to loosen the insulator to be replaced to a replaceable state. In order to ensure safety, people do not need to replace insulators urgently, the gears are shaken to tighten the lead screws in a labor-saving manner for several times, the clamps are impacted, the time is waited for 5 minutes after the clamps are seen to be free of problems, and then poor insulators are replaced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The complete device for replacing the direct-current 550kN glass insulator clamp is characterized by comprising an upper pocket clamp, a lower pressing clamp, a tightening screw rod and an extension joint, wherein the upper pocket clamp and the lower pressing clamp are similar in structure and are respectively matched, clamped and positioned with steel caps of two glass insulators on a glass insulator string, and the upper pocket clamp and the lower pressing clamp are connected through two groups of extension joints and the tightening screw rod to form a rectangular bearing structure; the upper pocket clamp or the lower pressing clamp comprises a clamp seat, a clamp cover, a ring lug bolt and a nut, the left side and the right side of the clamp seat extend outwards to form lug plates, connecting holes for connecting an extension joint or tightening a screw rod are formed in the lug plates, the ring lug bolts are symmetrically assembled on the clamp seat from left to right, a central hole for accommodating a steel cap is formed in the middle of the clamp seat and the clamp cover after the clamp seat is combined with the clamp cover, and the inner surface of the central hole is matched with a boss matching section of the steel cap; an excessive fit clearance m with a certain width is arranged between the clamping seat and the clamping cover.

2. The kit for replacing a direct current 550kN glass insulator clamp according to claim 1, wherein a steel snap ring is embedded on the matching section of the inner surface of the central hole and the boss of the steel cap.

3. The kit for replacing a dc 550kN glass insulator clip according to claim 1 or 2, wherein the width of the over-fitting clearance m is 2-6 mm.

4. The set of equipment for replacing a direct current 550kN glass insulator clamp according to claim 3, wherein an offset distance L is arranged between the excessive fit clearance m and the center of the center hole, the offset distance value is 8-12mm, and the center hole corresponding to the clamping seat is a major arc.

5. The kit for replacing a direct current 550kN glass insulator clamp according to claim 4, wherein the clamp cover is provided with mounting holes matched with the ring lug bolts, one of the mounting holes is a long round hole, and the other mounting hole is an open hole.

6. The kit for replacing a direct current 550kN glass insulator jig according to claim 5, wherein the ratio of the length to the width of the oblong hole is 1.25-2: 1.

7. The kit for replacing a direct current 550kN glass insulator clamp according to claim 1, wherein the tightening screw is a gear labor-saving tightening screw or a mechanical ratchet tightening screw.

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