CN2089616U

CN2089616U - Multifunctional levelling instrument

Info

Publication number: CN2089616U
Application number: CN 90220115
Authority: CN
Inventors: 薄建民
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-09-05
Filing date: 1990-09-05
Publication date: 1991-11-27

Abstract

The utility model relates to a multi-function level meter composed of a semi-circle angle measuring ruler, a heavy bob line, a small shaft, a horizontal base and a precision dial. The goal of inspecting the level degree the verticality, the slope angle and the deviation angle is achieved by adopting the variation of the included angle between the heavy bob line of the semi-circle angle measuring ruler and the zero degree line of the perpendicular line in precision dial of the horizontal base. The multi-function level meter can be widely used for the machine erection, the tensile test on the skeleton structures of the house and the bridge beam, and the test on the slope angle and the corner deviation angle of the highway and the railways; the multi-function level meter has the uniqueness.

Description

Multifunctional levelling instrument

The utility model belongs to a kind of detecting instrument.

The instrument of detection level degree commonly used and verticality mainly contains two kinds of forms in the prior art.A kind of is horizontal (surveyor's staff); A kind of is frame-type.(frame-type surveyor's staff) all adopts the position of bubble in glass tube to judge its levelness or verticality.The level meter of these two kinds of forms all can't record large-scale deviation and deviation angle.

The precision of bevel protractor commonly used generally at 1/30 degree, is applicable to the angle that detects small workpiece in the prior art, can not detect the angle of some planes and ground surface level.

The purpose of this utility model is the accuracy of detection and the scope of instrument of improving the standard.Change the measuring method of traditional bubble type, and adopt the angle that hangs down between the zero degree line in semicircle bevel protractor weight line and the horizontal base precision dish to judge levelness, verticality, and angle.And above two kinds of prior aries are combined, realized one-machine-multi-function, convenient being suitable for.

The utility model is by the semicircle bevel protractor, the weight line, and little axle, horizontal base and precision dish are formed.The center of semicircle bevel protractor (centre point) is fixed on the horizontal base upper end that the precision dish is housed by little axle, and can freely rotate around about axle.

This multifunctional level-meter not only has a name function of modern surveyor's staff (detection level, vertical), can detect the angle of various inclined-planes and ground surface level again.Can be widely used in machine the test of house bridge skeleton structure angle of pull is installed.Test to road surface deviation angle inside and outside the test of highway, the railway angle of gradient and the turning more has one's own knack.As long as the sine trigonometric function table of subsidiary a 0～90 degree just can calculate gradient height.

That is: h=L * Sin α

Fig. 1 is front elevation of the present utility model, side view and partial enlarged drawing.

(1) semicircle bevel protractor among the figure, (2) weight line, (3) little axle, (4) horizontal base, (5) precision dish.

Accompanying drawing 2 is to detect vertically, and accompanying drawing 3 is to detect the angle of gradient, and accompanying drawing 4 is technological demonstrations

Implement to illustrate detection method of the present utility model below by the best.

1, detection level: whether the zero degree line that hangs down in seeing semicircle bevel protractor (1) weight line (2) and horizontal base (4) precision dish (5) being gone up overlaps point-blank, it point-blank is level, otherwise be out-of-level, shown in angle be deviation angle, can calculate the deviation height.See Fig. 1.

2, detect vertically: level meter is affixed on the tested surface, sees that whether the zero degree line that hangs down in the precision dish (5) spends line point-blank with semicircle bevel protractor (1) 90, is vertically, otherwise can checks the size of deviation angle point-blank.(see figure 2)

3, detect the angle of gradient and deviation angle: get a straight flitch, place domatic or two rails on, watching on semicircle bevel protractor (1) weight line (2) and precision dish (5) center row's numeral is angle between zero scale mark, as right be not the integer number of degrees, its " branch " number pronunciation: " see when the semicircle bevel protractor turns right in the face of semicircle bevel protractor (1) and to face left its precision to arrange digital every lattice on the lines aimed at the lines of semicircle bevel protractor (1) in side 0～60 separated time lines that the row of going up digital (every lattice are 2 minutes) (2) sees when the semicircle bevel protractor turns left in its precision dish right side 0～60 separated time with semicircle bevel protractor (1) is aimed at down be 2 minutes.(number of degrees shown in Figure 3 are 9 degree 50 minutes) precision dish (5) is the usage of row's 0～60 mark down:

This number is used for wide-angle when test, as 89 degree 40 minutes, turns left when the semicircle angle, see precision dish right side mark do not have lattice can to the time, can see that the left side lines mark of aiming at will read precision and face left and arrange number under the side.Can see also when turning right that row is digital under precision dish (5) right side.(also being suitable for during low-angle) sees Fig. 3.

The semicircle bevel protractor is turned left to hang down in the precision dish and is surpassed 9 degree less thaies, 10 degree shown in the zero degree line and must see that precision dish mark should see the right side, and 50 separated times are relative, and reading is 9 degree 50 minutes.

As see when precision is faced left the side fraction line, should see down same 50 minutes of number of row relatively.

The technological demonstration (see figure 4):

Known AC ⊥ A ' B ' (AC is a pedestal precision dish center zero degree line for the level meter perpendicular bisector, and A ' B ' is tested inclined-plane)

AB ⊥ A ' C ' (AB be level meter semicircle bevel protractor weight line perpendicular to the ground surface level, AC be ground surface level.Take up an official post on tested inclined-plane and to get vertical line B ' C ' that 1 this point of B ' mistake is done the ground surface level)

∵AB⊥A′C′，B′C′⊥A′C′

∴ AB ∥ B ' C ', ∴ ∠ β=∠ β ' (alternate interior angle)

In right angle △ ABC and right angle △ A ' B ' C '

∵ ∠ β=∠ β ' ∴ ∠ α=∠ α ' (the similar corresponding angles of triangle equate)

Vertical zero degree line and semicircle bevel protractor weight wire clamp angle are exactly the angle on tested inclined-plane in the ∴ pedestal precision dish.

Claims

1, a kind of multifunctional level-meter that is used for detection level degree, verticality, the angle of gradient and deviation angle is made up of semicircle bevel protractor (1), weight line (2), little axle (3), horizontal base (4) and precision dish (5).It is characterized in that adopting on semicircle bevel protractor (1) weight line (2) and horizontal base (4) the precision dish (5), in the free variable angle of hanging down between the zero degree line reach testing goal.

2, multifunctional level-meter as claimed in claim 1, with semicircle bevel protractor (1), weight line (2), with horizontal base (4) and precision dish (5) on, in to hang down that the zero degree line overlaps be the detection level foundation.

3, as claim 1, described multifunctional level-meter, on horizontal base (4) precision dish (5), in hang down the zero degree line whether with semicircle bevel protractor (1) on, 90 degree lines overlap, for detecting vertical foundation.

4, multifunctional level-meter as claimed in claim 1, with on semicircle bevel protractor (1) weight line (2) and horizontal base (4) the precision dish (5), row's numeral is that the variable angle between zero scale mark is the detection angle of gradient and deviation angle foundation the center on.