CN87206212U

CN87206212U - Rotary indicator for testing high voltage

Info

Publication number: CN87206212U
Application number: CN 87206212
Authority: CN
Inventors: 吴识今; 杨秉章; 沈忠明; 胡见璋; 王明伟
Original assignee: GAUGE FACTORY SHANGHAI POWER SUPPLY BUREAU
Current assignee: GAUGE FACTORY SHANGHAI POWER SUPPLY BUREAU
Priority date: 1987-04-08
Filing date: 1987-04-08
Publication date: 1988-04-20

Abstract

The utility model discloses a rotary indicator for testing high voltage, comprising a contact (1), a tower shaped spring (2), a transparent engineering plastic casing (5), a shaft (8), and blades (12) with tip shaped parts which are arranged on the shaft (8). The utility model is characterized in that a total bearing (10) which is arranged on the embedded part (10) of the casing (5) is the cone shaped total bearing of an artificial jewel bearing (2) whose axial direction is adjustable; the blades are made from titanium foil, the casing is in the shape of a square whose four corners are circular-arc shaped. The casing which is provided with an insulating rod can be used as an electricity tester for high voltage alternating current, and the high voltage can be indicated by the rotation of the blades. The utility model is suitable for the alternating current high tension electricity from 6.6 kv to 500 kv.

Description

Rotary indicator for testing high voltage

The utility model relates to a kind of electroscopic device of High Level AC Voltage, relates to the rotary indicator that a kind of electroscopic device that can judge that whether High Level AC Voltage exists is used in more detail.

High voltage testing is used with the insulation rod that can freely stretch with rotary indicator is general, this rotary indicator comprises contact, turriform spring, transparent engineering plastics housing, rotating shaft, bearing assembly and can the free rotating around the shaft formations such as three lobe metal blades that have colour code.Every lobe blade all has a pointed blade-section, and its principle of work is that the principle that can produce " electric wind " when ionization takes place under near the highfield effect of the air molecule energized conductor tip is made.When its metal ball shaped contact during near high-voltage charged body, owing to exist very strong time dependent electric field around the electrified body, make metal ball shaped contact sense very high voltage, electric charge through moment gathers process, on metal blade, have a large amount of induced charges, because the tip curvature maximum of blade, so CHARGE DISTRIBUTION is the most intensive, strong especially electric field is arranged near it, when electric field intensity reaches certain value, under the effect of highfield, make the motion of residual ion generation fierceness in the air in the housing, and produce a large amount of ions with airborne molecular collision, this moment, airborne negative ions will be subjected to the repulsion and the attraction of the electric charge of electronegative and positively charged on the metal blade respectively, point discharge taking place and formed " electric wind ", light and handy metal blade is freely turned round towards certain orientation under the effect of " electric wind ", thereby can indicate the existence of high-tension electricity.No matter can both indicate power equipment that no-voltage is arranged correctly, significantly on overhead line structures or in the electric substation, it is a kind of safety appliance that is applicable to generating plant, electric substation and industrial and mining enterprises' electrical department, existing a kind of high voltage testing from Japanese import is a taper phosphor-copper rigid bearing with its bearing the rotary indicator, easily be worn, and poor seismic behavior, and its metal blade weight is light not enough, cause sensitivity not enough, and its housing is round, and on-the-spot the use accidentally is easy to when falling on the ground damage.

In order to overcome above-mentioned shortcoming, the purpose of this utility model is to use total bearing structure of the shockproof bearing of a kind of energy and wear-resisting bearing.

The purpose of this utility model also is the metal blade that uses the lighter material of a kind of usefulness to make, and detection sensitivity is improved.

The purpose of this utility model also is to provide a kind of shape of shell, unlikely damage when this indicator is fallen.

Rotary indicator provided by the utility model has adopted the bearing assembly of the axial adjustable band spring with artificial precious stone bearing.

Its metal blade of rotary indicator provided by the utility model can adopt titanium foil to make.

Rotary indicator provided by the utility model, the shape of its shell can adopt the square structure of band fillet.

The utility model has the advantages that the anti-seismic performance height of this rotary indicator, and improved sensitivity and can increase the service life good reliability.

Below in conjunction with accompanying drawing, most preferred embodiment of the present utility model is described in detail, wherein:

Fig. 1 is the schematic front view of rotary indicator of the present utility model;

Fig. 2 is the A-A cut-open view of Fig. 1;

Fig. 3 is the enlarged diagram of the bearing assembly of rotary indicator of the present utility model;

Fig. 4 is the riveting circle of fixed blade of the present utility model, the cross-sectional schematic of rivet set amplification partly.

Referring to Fig. 1, Fig. 2, wherein 5 is housing, can be made by transparent engineering plastics such as gelatin glass, can be bonded by two half blocks, its shape is square substantially, but its four angles are circular arc, after using this housing, when as using at the scene rotary indicator being fallen, on four fillets, housing is that the outside is square circular all the time in the force, and can be processed into all around and be certain taper, the inside is rounded, and shell thickens all around simultaneously, makes rotary indicator be difficult for falling broken.And along with the increase of wall thickness all around, the area of stick portion also increases thereupon, thereby sealing is improved to some extent, and makes the firm and sealing of contour structures.One end of this housing 5 links to each other with spring base 3, can bond together, be with turriform spring 2 on the top of spring base 3, the spherical contact 1 of band handle is equipped with on the top of turriform spring 2, this handle is inserted in the turriform spring 2 tightly, the other end of housing 5 is equipped with threaded attachment screw 15, the head that this attachment screw 15 is set in the shell 1 can make homalocephalus shape, coupling head 16 also is equipped with in screw 15 outsides, this screw 15 is used for being connected with testing with insulation rod, the central authorities of housing 5 are provided with two embedded parts 10 that bearing assembly 9 is installed, this embedded part links to each other with spring base 3 on electric through lead 4, blade rotor 8 rotatably is supported between the two bearings assembly 9, in this rotating shaft by riveting circle 7, rivet set 6 is equipped with blade 12, blade 12 is three integral blades that circular piece is formed haply, each circular piece all is extended with leg-of-mutton tip and keeps very little gap with the lining ring 13 that is contained in the housing, between lining ring 13 and the housing 5 electroscope capacitance sheet 14 is housed also, lining ring 13 is the insulator of annular, 14 of electroscope capacitance sheets are basically around the metal forming of lining ring aluminium foil for example, are connected on electric with the attachment screw 15 of an end of housing 5.But do not communicate with 3 of the spring bases of the other end of housing 5, leave one section breach.Colour code 11 is arranged on the blade 12, and colour code can be with red, and an annulus of its periphery is then used black.Just can find out whether rotary indicator rotates at a distance like this.This blade 12 can use the titanium foil manufacturing, and leaf quality is lighter like this, and rigidity is strong, need not electroplate, and the fusing point height has certain rigidity and electric conductivity, can not be corroded because of the point discharge of blade 12 and melt.And its shape can both keep blade 12 mechanical equilibriums in any obliquity, and when concentrating a large amount of electric charge point discharge, blade can rotate rapidly instantaneous.

Referring to Fig. 3, rotary indicator of the present utility model adopts axial adjustable conical bearing assembly 9, wherein 23 is the diminished shaft bearing, 21 is artificial precious stone bearing, be contained in the groove of bearing seat 23, pressure is with anti-chatter spring 22, and the pressure size of spring 22 can be by regulating through the set screw 24 of threaded engagement with bearing seat 23.The outer ring of bearing seat 23 can be processed with screw thread so that with the housing 5 of rotary indicator on embedded part 10 by threaded engagement, and adjust on the appropriate location by the groove on it and fix, pass through set screw 24 then and finely tune.Forming straight-tooth so that be fastened on the housing 5 by annular knurl on the outer ring of embedded part 10.This structure can antidetonation, is convenient to again install, and long service life.

Referring to Fig. 4, blade 12 is by clamping behind hollow riveting circle 7 and hollow rivet set 6 riveteds, then rotating shaft 8 being contained in the center pit of rivet set 6 by wringing fit.

In addition, to make the length L that contains the current-carrying part of contact 1 from an end of housing 5 be that 50 ± 10mm is good to the length of turriform spring 2 to be chosen to be, and can not collide with another phase line when measuring the charged situation of a certain high pressure phase line like this and cause power supply short circuit.

The high-pressure rotary electroscope that is made of the utility model can be applicable to 6.6 kilovolts to 500 kilovolts high-pressure system, does safe electrical verification.

Claims

1, a kind of high voltage testing rotary indicator, comprise contact 1, turriform spring 2, transparent engineering plastics housing 5, rotating shaft 8, be contained in the blade that has pointed blade-section 12 in the above-mentioned rotating shaft 8, the bearing assembly 10 that it is characterized in that being contained on the embedded part 10 of housing 5 is the axial adjustable conical bearing assemblies that contain artificial precious stone bearing 21.

2, rotary indicator as claimed in claim 1 is characterized in that above-mentioned adjustable bearing split bearing assembly is to regulate by being engaged on set screw 24 in the bearing seat 23 and the spring 22 that is pressed on the above-mentioned jewel bearing 21.

3, rotary indicator as claimed in claim 1 is characterized in that above-mentioned blade made by titanium foil.

4, rotary indicator as claimed in claim 1 is characterized in that the four jiaos of squares in the arc-shaped that are shaped as of above-mentioned housing 5.

5, rotary indicator as claimed in claim 1 is characterized in that the length L that above-mentioned housing 5 one ends contain the current-carrying part of above-mentioned contact 1 and turriform spring 2 is 50 ± 10mm.

6, rotary indicator as claimed in claim 1 is characterized in that being fixed in the rotating shaft 8 after above-mentioned blade 12 is by hollow riveting circle 7 and hollow rivet set 6 riveteds.