CN2352967Y

CN2352967Y - Moving contact motion locus sensor

Info

Publication number: CN2352967Y
Application number: CN 98207861
Authority: CN
Inventors: 胡崇铭; 刘贵鑫
Original assignee: BEIJING SWITCH FACTORY
Current assignee: BEIJING SWITCH FACTORY
Priority date: 1998-08-20
Filing date: 1998-08-20
Publication date: 1999-12-08
Anticipated expiration: 2008-08-20

Abstract

The utility model relates to a motion track sensor for a moveable contact, which is a sensor for detecting the motion characteristics of the moveable contact, and has a sliding base body 1 and a sliding contact 4, wherein, the sliding base body 1 is formed by that a resistance body 2 is covered on the outer surface of an insulating rod 3; the sliding contact 4 can be connected with the moveable contact of high-voltage switch equipment without graphic representation for sliding on the sliding base body 1; the resistance body 2 which is covered on the outer surface of the insulating rod 3 can be formed by that a resistance wire which is made of a constantan wire is wound on the outer surface of the insulating rod 3. Compared with the present sensors, the utility model can more exactly detect the motion characteristics of the moveable contact by much higher accuracy.

Description

Moving contact movement locus sensor

The utility model belongs to moving contact to device for switching, particularly movement locus and velocity characteristic such as high-tension switch gear moving contacts such as primary cut-outs is carried out measured sensor.

As everyone knows, as connecting and the moving contact of the high-tension switch gear of disjunction high-tension circuit, its kinetic characteristic, particularly divide-shut brake speed there is the requirement of strictness.The existing moving contact movement locus sensor that the kinetic characteristic of moving contact is detected has slide block type sensor and slip formula sensor etc.

The slide block type sensor has by a plurality of conducting strips 12 and a plurality of insulating trips 11 slip matrix 10 that becomes of closed assembly alternately shown in Fig. 4 (a), and can with the moving contact of the not shown high-tension switch gear slider 13 of slip on above-mentioned slip matrix 10 linkedly.Lead A1, B1 that links to each other respectively with the conducting

strip

12,12 that is positioned at slip matrix 10 two ends and the lead C that links to each other with slider 13 receive display devices such as light recording camera not shown, that be used to show.When slider 13 slides on slip matrix 10 linkedly with moving of not shown high-tension switch gear moving contact, figure is write down and got to the change of the position of slider 13 on slip matrix 10 automatically through the light recording camera, promptly measure the stroke distances of moving contact and the relation between the run duration, by calculating, can obtain moving contact movement velocity (for example the closing of moving contact, opening velocity), can also analyze the kinetic characteristic of moving contact.

But the kinetic characteristic of the moving contact that records through the slide block type sensor shows that at recording camera the waveform of getting shown in Fig. 4 (b), is the impulse type waveform that several just differ.That is, slide on by conducting strip 12 and the insulating trip 11 slip matrix 10 that alternately closed assembly forms and on-state and off-state alternately occur,, do not reflect the moment kinetic characteristic so measured speed can only be the mean value in a certain interval with slider 13.

And existing slip formula sensor is shown in Fig. 5 (a), the slider 23 that has resistive element 20 and can on this resistive element 20, slide linkedly with the moving contact of not shown high-tension switch gear, and resistive element 20 be by stretching be fixed on the support, constituted by the resistance wire of making such as constantan wire etc.The line C2 of the ends A 2 of resistive element 20, B2 and slider 23 is tapped on the not shown display devices such as light recording camera.Its principle of work is the same with aforementioned slide block type sensor, is by slider 23 slippage and measure the kinetic characteristic of high-tension switch gear moving contact indirectly on the resistive element 20 that is made of resistance wire linkedly with the motion of high-tension switch gear moving contact.The measured moving contact H-t curve (stroke-time curve) of this sensor can demonstrate the kinetic characteristic of each moment shown in Fig. 5 (b).But, owing to the length of the resistive element 20 that is made of resistance wire can not be done very longly, so corresponding to the whole movement travel of moving contact, the amplitude of the stroke H in the H-t curve that is reflected on display devices such as light recording camera is less, so measuring accuracy is lower; And owing to be subjected to constituting the limitation of intensity of the resistance wire of resistive element 20, slider 23 is less with respect to the contact pressure of resistive element 20, so in the process that slider 23 slides on resistive element 20, irregular variation will take place in the contact resistance between the two, shown in Fig. 5 (b), and the waveform that on the H-t curve, stack is fluctuated, therefore, the accuracy that repeated measurement repeatedly can the confirmatory measurement value.

The purpose of this utility model provides a kind of can accurately the measurement such as the movement locus of the moving contact of high-tension switch gears such as primary cut-out and the sensor of velocity characteristic with higher precision.

For achieving the above object, the slider that sensor of the present utility model has the slip matrix that resistive element covered on the insulation rod outside surface and constitute and can slide on above-mentioned slip matrix linkedly with the motion of high-tension switch gear moving contact, the line that links to each other with the two ends of said resistive element can be tapped into the line that links to each other with said slider on the display device such as light recording camera.As an embodiment, the said resistive element that covers on the insulation rod outside surface is with close on insulation rod and form such as the suitable resistance wire of constantan wire constant resistance rate, but also can be with the coating of resistivity proper metal or be plated on the insulation rod and form.

Fig. 1 is the structural representation of an embodiment of the utility model sensor.

Fig. 2 is a stereographic map embodiment illustrated in fig. 1.

Fig. 3 (a) is a principle schematic embodiment illustrated in fig. 1, (b) is the shown H-t curve map of light recording camera when adopting this embodiment to test moving contact.

Fig. 4 (a) is existing slide block type principle of sensors synoptic diagram, (b) is the shown oscillogram of light recording camera when adopting this existing slide block type sensor test moving contact.

Fig. 5 (a) is existing slip formula principle of sensors synoptic diagram, (b) is the shown H-t curve map of light recording camera when adopting this existing slip formula sensor test moving contact.

Below, the utility model is described in further detail in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of an embodiment of the utility model sensor.As shown in Figure 1, the slider 4 that the utlity model has on insulation rod 3 outside surfaces the slip matrix 1 that covers resistive element 2 and constitute and can on this slip matrix 1, slide linkedly with the moving contact of not shown high-tension switch gear.In embodiment illustrated in fig. 1, the said resistive element 2 that covers on insulation rod 3 outside surfaces is to be made of the resistance wire that is wrapped on insulation rod 3 outside surfaces, in addition, also can be in the coating of the outside surface of insulation rod 3 or plate metal level and constitute with proper resistor rate.The winding of said resistive element 2 on insulation rod 3 outside surfaces preferably close around.Constitute resistive element 2, to be wrapped in resistance wire on insulation rod 3 outside surfaces can be the tinsel that constantan wire etc. has the proper resistor rate.The line A that is connected with the two ends of resistive element 2 and B and the line C that is connected with slider 4 are connected on the not shown display devices such as light recording camera.In embodiment illustrated in fig. 1, said slider 4 is the right cylinder of circular arc for front end, but also can be spheroid, the structure that can also adopt other that slider 4 is slided on slip matrix 1 in intimate contact.

Because in embodiment illustrated in fig. 1, its slip matrix 1 is resistive element 2 is wrapped on the insulation rod 3 and constitutes, so needn't resemble rigidity and the insufficient strength of worrying the resistive element 20 that constitutes by resistance wire the existing slip formula sensor, and slider 4 is slided with the tight contact resistance body 2 of enough big normal pressure, thereby can prevent the fluctuating waveform of stack shown in Fig. 5 (b) on the H-t curve effectively, improve the accuracy of test.Shown in Fig. 3 (b), when with this form of implementation test moving contact kinetic characteristic, the moving contact H-t curve that shows on the light recording camera is very level and smooth; In addition, owing to be that resistive element 2 is wrapped on the insulation rod 3, so compare with the stretching fixing resistive element of existing slip formula sensor, length is with much longer, so corresponding to the whole movement travel of moving contact, the changes in resistance amplitude is much bigger, and the amplitude of the stroke H of the contact H-t curve that is reflected on display devices such as light recording camera is much bigger, so improved measuring accuracy.Therefore, the utility model can be measured the speed of any time in the moving contact motion process accurately exactly, overcome the shortcoming that existing slide block type sensor and slip formula sensor exist, good test effect can be applied to the test of high-tension switch gear moving contact kinetic characteristics such as primary cut-out.

Claims

1. moving contact movement locus sensor, the slider 4 that has slip matrix 1 and can slide on this slides matrix 1 is characterized in that, said slip matrix 1 is a covering resistive element 2 and constituting on insulation rod 3 outside surfaces.

2. as the said moving contact movement locus of claim 1 sensor, it is characterized in that the said resistive element 2 that covers on insulation rod 3 outside surfaces is close resistance wires on insulation rod 3 outside surfaces.

3. as the said moving contact movement locus of claim 2 sensor, it is characterized in that said close resistance wire on insulation rod 3 outside surfaces is a constantan wire.