CN2072222U

CN2072222U - Contact pressure measurer

Info

Publication number: CN2072222U
Application number: CN 90213647
Authority: CN
Inventors: 沈红强
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-01
Filing date: 1990-08-01
Publication date: 1991-02-27

Abstract

The utility model relates to a contact pressure measurer which measures the contact pressure of a high-voltage switch. The utility model is suitable for a manufacture department and an operation department for the high-voltage switch, and can conveniently and exactly measure the contact pressure value of a contact. The utility model comprises two parts, namely, a mechanical part and an electrical connection head for a display box and a micro switch, wherein, the mechanical part adopts a balance principle in fact and has a spring instead of a weight at one end. As the pressure can be measured only when the opening size of the contact is 's', the micro switch and the display box are arranged to display the varying state of 's'.

Description

Contact pressure measurer

The utility model relates to a kind of instrument that measures the high-voltage switch gear contact pressure, and it is applicable to the manufacturing and the operation department of high-voltage switch gear.Can make things convenient for the correct contact pressure value that determines contact with it.

The contact pressure of contact is that high-voltage switch gear is an important parameter of guaranteeing that through-flow performance is required.But press high-voltage switch gear manufacturing and operation department,, still adopt common spring balance to measure so far for the measurement of switch contact pressure.Its method: a kind of is directly to draw back contact with spring balance, read force value.Another kind is the method that measures indirectly, promptly records the friction force that contacts between the dynamic/static contact with spring balance, estimates the suffered vertical compression power of contact then.These methods not only measure inconvenience but also error is bigger.

The purpose of this utility model be manage measurement for high-voltage switch contact pressure provide a kind of can be applicable to different contacts and be convenient to measure the measuring instrument that precision is high again.

The purpose of this utility model can realize by following scheme:

Design a kind of can directly read correct pressure value and simple in structure, portably use easily the electromechanical components principle and be a balance but an end adopts balancing spring 6 to scale core is opposite side, with detecting head master scale core is a side, both sides such as arm of force length are first-class, both sides are in equilibrium state, and this moment, balancing spring just can reflect by the pressure measurement increasing little.

(embodiment) describes its architectural feature in detail below in conjunction with accompanying drawing:

This measuring instrument comprises balance arm 1, base plate 2, detecting head 3, scale core 4, screw rod 5, balancing spring 6, swivel nut 7, pointer 8, scaleplate 9, handle 11, microswitch 14, display box 15,

light emitting diode

16,17, switch 18, dry cell 19.

Its one-piece construction is seen Fig. 1.

The electrical wiring of microswitch and display box is seen Fig. 2.

Principle of work of the present utility model is as follows:

Its mechanical part essence is one " balance ", but the one end is to adopt spring rather than common counterweight.With detecting head master scale core is a side, is opposite side with balancing spring 6 to scale core.Both sides such as arm of force equal in length, then when balancing spring power equaled by dynamometry, both sides were in equilibrium state, just this moment, balancing spring can reflect the size of tested contact pressure.

Because the pressure of the contact of surveying must be contact at the pressure that opens when being of a size of " S ", so a microswitch is set and display box correctly shows the variable condition of " S ".

Its measurement step is as follows:

1, loads onto pressure-measuring head (various tested switch contacts have special-purpose pressure-measuring head according to its structure difference).

2, spring is placed (compression) approach to desire near the measuring pressure value.

3, adjust size S: set screw (12) correctly reaches size S.

4, set screw (13) makes green light luminous, withdraws from the just bright degree of some red lights slightly but be transferred to, and adjusts this moment to finish.

5, pressure-measuring head is inserted in the tested contact, as the still bright then further compression spring (6) of green light this moment, just bright until red light, the reading of pointer this moment (8) is institute's measuring pressure value.Luminous as red light, then should alleviate spring force (being the counter-rotation crank), luminous until green light, and then compression spring, so as to read the firm reading of pointer (8) when bright of red light.

Below explanation simultaneously, microswitch and display box can play two effects: the one, the equilibrium state of reflection balance, the 2nd, the gyratory directions of prompting crank:

When switchblade greater than by dynamometry the time, red light is bright, the prompting crank should reverse, and alleviates spring force (minimizing decrement).

When switchblade less than by dynamometry the time, green light is bright, the prompting crank should just change, and increases spring force (increase decrement).

Firm when bright at red light or green light, all reflect tested force value.But, can be defined as the firm reading when bright of red light be as the criterion (during more accurate measuring cell with red light just bright being as the criterion) for improving precision.

Basic characteristics of the present invention:

1, changed the original method of in the past measuring contact pressure, make measurement very easy, and the contact that makes some can't directly measure pressure in the past has been achieved direct measurement with spring balance.

2, the degree of accuracy that records force value is higher than the result with spring balance.

3, simple in structure gently little.

4, range ability is big.

5, add annex at the detecting head place, the function of the scale that can serve many purposes is not made for the usefulness that measures the high-voltage switch contact contact pressure and be not only limited to.

Claims

1, a kind of contact measuring instrument, comprise a kind of can directly read the electromechanical components of correct pressure value, it is characterized in that with detecting head 3 main scale cores be that a lateral balance spring 6 to scale core is an opposite side, spring places near desiring the measuring pressure value more nearby, measuring head inserts by in the gauge head, and set screw reaches size S.

2, according to the described contact measuring instrument of claim 1, it is characterized in that when spring force red light less than the time brightly by dynamometry, prompting handle 11 should reverse bright when spring force green light less than by dynamometry the time, and the prompting handle just changes.