CN202110993U

CN202110993U - Special grounding knife device

Info

Publication number: CN202110993U
Application number: CN2011201734926U
Authority: CN
Inventors: 李林友; 冯海涛; 李上保; 林秀; 陈声富
Original assignee: Zhanjiang High Voltage Appliance Co ltd
Current assignee: Zhanjiang High Voltage Appliance Co ltd
Priority date: 2011-05-27
Filing date: 2011-05-27
Publication date: 2012-01-11
Anticipated expiration: 2021-05-27

Abstract

The utility model provides a special grounding knife device comprising a grounding knife component, a support plate and two guide rods sheathed with a pressure spring, wherein the grounding knife component comprises a main shaft, a ground row arranged on the main shaft, three sets of movable knifes, a driving crank arm arranged at the front end of the main shaft and two pressure spring crank arms arranged at shaft shoulders at two ends of the main shaft; a front groove plate and a back groove plate are arranged at two sides of the support plate, main shaft holes are respectively arranged at the upper ends of the front groove plate and the back groove plate, and the lower parts of the front groove plate and the back groove plate are outwards extended to be provided with a support lug with a pin hole; the main shaft is arranged by the main shaft holes in the front groove plate and the back groove plate; and the upper ends of the two guide rods are respectively in pin joint with one of the pressure spring crank arm, and the lower ends of the two guide rods are respectively and movably connected with the pin holes of the front groove plate and the back groove plate by a round pin column. The special grounding knife device is compact in structure, light in weight, flexible and reliable in operation, good in dynamo-thermal stability, high in closing capacity, convenient to assemble and combine with various cabinets, suitable for matching with various high-voltage switch cabinets in an indoor 12KV three-phase current 50Hz electrical power system, and further capable of being used for protecting the grounding when high-voltage electrical equipment is overhauled.

Description

A kind of special-purpose ground connection knife system

Technical field

The utility model belongs to the earthed switch equipment technical field; It specifically is a kind of special-purpose ground connection knife system that is used for earthed switch equipment; Be applicable to the interior and supporting use of each model high-tension switch cabinet of electric power system of indoor 12KV three-phase alternating current 50Hz, earthy when also can be used as the high-voltage electrical equipment maintenance.

Background technology

The ground connection cutter is one of main auxiliary equipment of high-tension switch cabinet, also usually need use the ground connection cutter to come interior other electric part of protection equipment not to be damaged during the high-voltage electrical equipment maintenance.Firm sum velocity when traditional ground connection cutter closes a floodgate is slow, and adjustment three-phase synchronism is not good enough, if close when closing the above short circuit current of 50kA, owing to there is voltage and current to cause the fixed contact prebreakdown on ground connection cutter and the cabinet busbar easily, burns out ground connection cutter and fixed contact.

Summary of the invention

For overcoming the problem of traditional ground connection knife system existence of adopting in the electric power system; The utility model is provided for a kind of special-purpose ground connection knife system of earthed switch equipment; With in the electric power system of satisfying indoor 12KV three-phase alternating current 50Hz with the supporting needs of each model high-tension switch cabinet, it is earthy also to can be used as high-voltage electrical equipment when maintenance.

The special-purpose ground connection knife system of the utility model mainly comprises:

One ground connection knife assembly, it comprises main shaft, is fixed on the ground row on the main shaft, three groups of moving knife arranging, two stage clip connecting levers that are fixed on the driving connecting lever of front-end of spindle and are installed on the main shaft two ends shaft shoulder with being installed in; One supporting bracket, frid and drop end before supporting bracket both sides symmetry is installed, preceding frid and drop end upper end are equipped with spindle hole, and preceding frid, drop end bottom all extend outward the support ear that has pin-and-hole; Said main shaft is installed through the spindle hole on preceding frid and the drop end; And two guide posts; There is long guiding hole this guide post lower end; Suit stage clip and stage clip lid on each guide post; The upper end of each guide post connects through round pin is movable with one of said stage clip connecting lever respectively, and the long guiding hole of a guide post lower end connects through a round pin post is movable with the pin-and-hole of the support ear of preceding frid, and the long guiding hole of another guide post lower end connects through another round pin post is movable with the pin-and-hole of the support ear of drop end.

Wherein, only there is left side wall said preceding frid upper end, has spindle hole on this left side wall, and preceding frid bottom two walls extend outward the support ear that has pin-and-hole.

Said drop end and the design of preceding frid left-right symmetric, only there is right side wall the drop end upper end, has spindle hole on this right side wall, and drop end bottom two walls extend outward the support ear that has pin-and-hole.

There is pin-and-hole said guide post upper end, and closely this pin-and-hole place establishes baffle ring, and said stage clip and stage clip lid are sleeved on the guide post part below the baffle ring.

This special-purpose ground connection knife system compact conformation; Safe and reliable, in light weight, flexible operation, easy for installation, dynamic and thermal stability good, making capability is strong; Convenient and all types of 12KV cabinets are assembled, and are applicable to the interior and supporting use of each model high-tension switch cabinet of electric power system of indoor 12KV three-phase alternating current 50Hz.

Its making capability is strong, can not be damaged by interior other electric equipment of protection switch equipment, and ground protection is used when can be used as the high-voltage electrical equipment maintenance.

This special-purpose ground connection knife system is supporting to be assemblied in the XGN-12 environment-friendly type ring main unit, the comprehensive assessment experiment authentication through national High-Voltage Electrical Appliances quality supervision and test center, and its performance meets the requirement of BG1985 " ac high-voltage isolating switch and earthed switch " and IEC60129.

Description of drawings

Fig. 1 is the front view of this special-purpose ground connection knife system one embodiment;

Fig. 2, the 3rd, the left view of Fig. 1 embodiment, right view;

Fig. 4 is the left view that Fig. 1 embodiment rotates 90 degree "on" positions;

Fig. 5 is a ground connection knife assembly part schematic perspective view among Fig. 1 embodiment;

Fig. 6-the 8th, the front view of its preceding frid, left view and vertical view;

Fig. 9, the 10th, front view and left view after its guide post, stage clip and the assembling of stage clip lid;

To be Fig. 4 "on" position moving knife contact sketch map with fixed contact on the cabinet busbar to Figure 11;

Figure 12 is that the A of Figure 11 is to view.

Major part is in the accompanying drawing: ground connection knife assembly 1, and ground row 1a, moving knife 1b, main shaft 1c drives connecting lever 1d, supporting bracket 2, preceding frid 3, stage clip connecting lever 4, round pin 5, guide post 6, stage clip 7, stage clip lid 8, round pin 9, drop end 10.

Embodiment

Further specify below in conjunction with the embodiment accompanying drawing.

With reference to Fig. 1-10, the special-purpose ground connection knife system of present embodiment mainly comprises: ground connection knife assembly 1, and the supporting bracket 2 of frid 3 and drop end 10 before being equipped with, and two guide posts 6 with stage clip, the cutter shaft assembly passes through its main shaft 1c by preceding frid 3 and drop end 10 supportings.

Ground connection knife assembly 1 comprises: main shaft 1c, be fixed on ground row 1a on the main shaft 1c, arrange three groups of moving knife 1b on the 1a, two stage clip connecting levers 4 that are fixed on the driving connecting lever 1d of main shaft 1c front end and are installed on the main shaft 1c two ends shaft shoulder with being installed in.

Supporting bracket 2 is a rectangle supporting bracket, frid 3 and drop end 10 before supporting bracket 2 both sides symmetries is installed, and preceding frid 3 and drop end 10 upper ends are equipped with spindle hole n, and preceding frid 3, drop end 10 bottoms all extend outward the support ear that has pin-and-hole m; Main shaft 1c installs through the spindle hole n on preceding frid 3 and the drop end, and two stage clip connecting levers 4 lay respectively at outside the spindle hole n of preceding frid 3, drop end 10.

Like Fig. 9,10, there is pin-and-hole guide post 6 upper ends, and closely this pin-and-hole place establishes baffle ring, and there is long guiding hole guide post 6 lower ends, and stage clip 7 is sleeved on following guide post 6 parts of this baffle ring with stage clip lid 8, and round pin post 9 passes the long guiding hole of guide post 6 lower ends.

Above-mentioned two guide post 6 mounting meanss are identical; Suit stage clip 7 and stage clip lid 8 on each guide post 6; The upper end of the guide post 6 at preceding frid 3 places connects through round pin 5 activities with one of said stage clip connecting lever 4, and the lower end long guiding hole of this guide post 6 connects through a round pin post 9 activities with the pin-and-hole m of the support ear of preceding frid 3; The upper end of the guide post 6 at drop end 10 places connects through another round pin 5 activities with said another stage clip connecting lever 4, and the lower end long guiding hole of this guide post 6 connects through another round pin post 9 activities with the pin-and-hole m of the support ear of drop end 10.

Fig. 6-the 8th, the front view of its preceding frid 3, left view and vertical view.Only there is left side wall preceding frid 3 upper ends, have spindle hole n on this left side wall, and preceding frid 3 bottoms two walls extend outward and support ear, and there is pin-and-hole m the outer end of this support ear.

Drop end 10 and preceding frid 3 left-right symmetric design, only there is right side wall drop end 10 upper ends, have spindle hole n on this right side wall, and drop end 10 bottoms two walls extend outward and support ear, and there is pin-and-hole m the outer end of this support ear.

Below in conjunction with Fig. 1-4, Figure 11 and Figure 12 its operation principle is described.When high-tension switch cabinet send the normal operation of electricity, be E in the separating brake position like Fig. 1-3 ground connection knife assembly 1.When high-tension switch cabinet has a power failure inspection, need the existing operating mechanism of operation that earthed switch is closed a floodgate at Fig. 4, closing position F shown in Figure 11.In order to accomplish this operating process; Make driving connecting lever 1d make main shaft 1c overcome the moment of resistance as moment; The stage clip connecting lever 4 that drives ground connection knife assembly 1 and be fixed on the main shaft 1c rotates along the combined floodgate direction; And make the guide post 6 that connects on the stage clip connecting lever 4 handle spring 7 compressions, through the stage clip dead point, stage clip releases energy when main shaft 1c rotates 45 degree scopes; Make the earthed switch closing position that closes a floodgate fast, three groups of moving knife 1b on the ground connection knife assembly 1 through its disk spring 1b2 be contained in cabinet busbar 20 on solid and reliable contact of flange part of fixed contact 201.

Shown in Fig. 1, Figure 11-12; The structure of every group of moving knife 1b adopts traditional design; It comprises at interval two blade 1b1 on the row 1a with being installed in, at the epimere of two blade 1b1 joint pin 1b3 is set, and is positioned at outside two blade 1b1, on joint pin 1b3, wears a disk spring 1b2 respectively.Because of disk spring 1b2 is the both sides that are contained at two cutter 1b1, moving knife 1b two cutter 1b1 spacings when not closing a floodgate are h, and the flange part design size h1 of the fixed contact 201 on the cabinet busbar 20 is greater than h, like 0.5mm etc."on" position; The flange part size h1 of the fixed contact 201 on the cabinet busbar 20 is greater than spacing h=0.5mm of two cutter 1b1; So disk spring 1b2 is compressed when closing a floodgate, because the active force of two disk springs makes moving knife and solid and reliable contact of these fixed contact 201 flange parts.

During sub-switching operation; Opplied moment makes main shaft 1c overcome main force's square and three groups of moving knife 1b pass through disk spring power; Driving stage clip connecting lever 4 rotates along the separating brake direction; And make the guide post 6 on the stage clip connecting lever 4 handle length of spring compressed, finish the stage clip earthed switch separating brake that releases energy through the stage clip dead point when rotating 45 degree scopes, in order to closing a floodgate next time.And the closing speed of earthed switch and people's service speed is irrelevant.

Be suitable for to need, operate clockwise closing position in the F position or counterclockwise operation close a floodgate in the E position all can, according to voltage and cabinet difference can be provided with flexibly at a distance of and fixed installation.

This special-purpose ground connection knife system advanced design, technical performance is reliable; Simple in structure, Installation and Debugging are convenient; Quick deciliter, has the short circuit making capability; Aesthetic in appearance, manufacture craft is superior.

Claims

1. special-purpose ground connection knife system is characterized in that comprising:

One ground connection knife assembly, it comprises main shaft, is fixed on the ground row on the main shaft, three groups of moving knife arranging, two stage clip connecting levers that are fixed on the driving connecting lever of front-end of spindle and are installed on the main shaft two ends shaft shoulder with being installed in;

One supporting bracket, frid and drop end before supporting bracket both sides symmetry is installed, preceding frid and drop end upper end are equipped with spindle hole, and preceding frid, drop end bottom all extend outward the support ear that has pin-and-hole; Said main shaft is installed through the spindle hole on preceding frid and the drop end; And

Two guide posts; There is long guiding hole this guide post lower end; Suit stage clip and stage clip lid on each guide post; The upper end of each guide post connects through round pin is movable with one of said stage clip connecting lever respectively, and the long guiding hole of a guide post lower end connects through a round pin post is movable with the pin-and-hole of the support ear of preceding frid, and the long guiding hole of another guide post lower end connects through another round pin post is movable with the pin-and-hole of the support ear of drop end.

2. special-purpose ground connection knife system according to claim 1 is characterized in that comprising: only there is left side wall the frid upper end before said, has spindle hole on this left side wall, and preceding frid bottom two walls extend outward the support ear that has pin-and-hole.

3. special-purpose ground connection knife system according to claim 1 and 2 is characterized in that comprising: only there is right side wall said drop end upper end, has spindle hole on this right side wall, and drop end bottom two walls extend outward the support ear that has pin-and-hole.

4. special-purpose ground connection knife system according to claim 1 is characterized in that: there is pin-and-hole said guide post upper end, and closely this pin-and-hole place establishes baffle ring, and said stage clip and stage clip lid are sleeved on the guide post part below the baffle ring.