CN201417118Y

CN201417118Y - Vernier pitch caliper

Info

Publication number: CN201417118Y
Application number: CN200920079113XU
Authority: CN
Inventors: 戴斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-19
Filing date: 2009-02-19
Publication date: 2010-03-03
Anticipated expiration: 2019-02-19

Abstract

The utility model relates to the technical field of a measure, in particular to a vernier pitch caliper adapted to measure the centre distance of pipes between equal-diameter parallel pipes. The utility model provides the vernier pitch caliper comprising a main scale, a vernier scale, according to the disadvantages of inconvenient usage, low work efficiency, low precision, disability to read directly,and restrained operative space in the existing operation. The vernier scale can slide, while the claw feet of the two scales are provided with indentations, and can be located automatically. The vernier pitch caliper has the advantages of convenient use, speediness, high precision and intuitive reading, is particularly suitable for large-scaled industrial production testing, and satisfies thedemands of batch measurement and detection in production well.

Description

Vernier pitch chi

Affiliated technical field

The utility model relates to the measurer technical field, is specially adapted to measure the vernier pitch chi of centre distance between the isometrical parallel pipe.

Background technology

In the commercial production, often run into the problem (distance between pipe and the pipe center line is commonly called as the pipe pitch) that needs to measure centre distance between one group of isometrical parallel pipe.As the station boiler industry, in the fin panel casing manufacture process, pitch between the membrane wall pipe is measured, because that pipe range leaves the surplus pipe end is uneven, can't use vernier caliper to measure at pipe end, measures difficulty thereby increase.Existing way is: use a length to be placed on the two tubes greater than the steel disc of pipe pitch, move along the tube axis direction, firmly respectively scrape one the straight line (see figure 4) on the two tubes surface, and then the use straight steel ruler is measured the distance between the twice straight line, thereby estimate the pitch of two tubes, because the line thickness inequality that scrapes, use that the straight steel ruler measuring error is big, inefficiency, precision is low, intuitively but the reading operating space is restricted, can not satisfy in the production demand measure batch, detection.

The utility model content

But the purpose of this utility model provides the vernier pitch chi that a kind of precision height, reading operating space directly perceived is not restricted.

The technical scheme that its technical matters that solves the utility model adopts is: this vernier pitch chi comprises main scale, vernier scale.Vernier scale can slide along main scale, a size, the identical breach of shape are arranged respectively on the pawl pin of main scale and vernier scale, on the two pawl pin contact point of breach and measured pipe 4 point-blank, the distance between the two breach centers is the metering reading of this vernier pitch chi.Because 4 points (seeing A among Fig. 1, B, C, D 4 points) that breach contacts with measured isometrical parallel pipe surface on this vernier pitch chi two pawl pin point-blank, line segment AB equals line segment CD, because the pipe xsect is a circle, characteristic according to circle: when line segment AB equals line segment CD, and 4 of A, B, C, D are point-blank the time, so the mid point of mid point by AB and CD do the vertical line of ABCD straight line respectively must be by the centers of circle of two circles, the distance between the mid point of the mid point of AB and CD equals the distance between the two round hearts like this.The breach that draws two pawl pin thus has the function that isometrical parallel pipe center line is found in automatic location, thereby measures isometrical parallel pipe centre distance (being pitch) conveniently, accurately.Be equipped with scale on main scale and the vernier scale, when main scale and vernier scale two pawl pin close up (see figure 5), to aim at the shown numerical value of scale mark on the main scale be distance (being the distance between the central point of central point and CD of AB) between the two pawl pin breach central points to zero line on the vernier scale, so the numerical value of directly reading that need not convert when measurement pipe pitch is exactly two centre distances (pitch) between the pipe.

The beneficial effects of the utility model are: vernier pitch chi is convenient and practical, reading is simple and clear, measuring accuracy is high, not limited by site environment, there is not specific (special) requirements during measurement, can measure at any place of isometrical parallel pipe, need not measure at pipe end, not need to seek reference point, the location is directly measured at tube surface and is got final product automatically, measuring accuracy and efficiency of measurement improve greatly, satisfy the demand to measuring, checking in producing.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model vernier pitch chi front view, vertical view, M-M cut-open view.

Fig. 2 is that the utility model vernier pitch chi is implemented illustration.

Fig. 3 is the vertical view of Fig. 2.

Fig. 4 is current measuring methods figure.

Fig. 5 is the views of vernier pitch chi two pawl pin when closing up.

1. main scales among the figure, 2. vernier scale, 3. pipe, 4. band steel, 5. weld seam, 6. steel disc,

A, B, 4 of C, D are the contact point of main scale (1) and vernier scale (2) pawl pin breach and measured pipe.

Embodiment

In Fig. 1, this vernier pitch chi divides the two large divisions: main scale (1), vernier scale (2).On the pawl pin of main scale (1) and vernier scale (2), leave a size, the identical breach of shape respectively, be illustrated as semicircle.4 A, the B that main scale (1) and vernier scale (2) pawl pin breach contact with measured pipe, C, D are point-blank, along with vernier scale (2) is parallel with glide direction all the time along main scale (1) this 4 straight lines that are linked to be that slide, the distance on two breach between the center of 2 of the center of 2 of A, B and C, D is the reading on the vernier pitch chi.Two pawl pin notch geometries can be V-type, fan type or semicircle etc., preferably adopt semicircle, and semicircle manufacturing is easy to process.

In embodiment illustrated in fig. 2, vernier pitch chi is placed on the two tubes surface, make two pawl pin of main scale (1) and vernier scale (2) contact pipe (3) fully, utilize the automatic positioning function of breach, accurately measure two centre distances (being pitch) between the pipe at circular surface.

(Fig. 3 is the vertical view of Fig. 2) in the embodiment shown in fig. 3, visible one group of isometrical parallel pipe pipe end is uneven, and vernier pitch chi can be measured at any place of isometrical parallel pipe.

Figure 4 shows that current measuring methods: use a length to be placed on the two tubes greater than the steel disc (6) of pipe pitch, move along pipe (3) axis direction, firmly respectively scrape straight line one on the two tubes surface, and then use straight steel ruler to measure distance between the twice straight line, be used for estimating the distance between the two tubes center.

When Figure 5 shows that vernier pitch chi main scale (1) and vernier scale (2) two pawl pin close up, vernier scale (2) is gone up zero line, and to aim at numerical value that the scale mark on the main scale (1) shows be distance (being the distance between the central point of the central point of AB and CD) between two pawl pin breach and the measured pipe contact point center, so when measuring the pipe pitch, the numerical value of directly reading is exactly two centre distances (being pitch) between the pipe.

Claims

1. vernier pitch chi of measuring pipe centre distance between the isometrical parallel pipe, comprise that main scale (1), vernier scale (2) is characterized in that vernier scale (2) can slide along main scale (1), a size, the identical breach of shape are arranged respectively on the pawl pin of main scale (1) and vernier scale (2), on the two pawl pin contact point of breach and measured pipe 4 point-blank, the distance between the two breach centers is the metering reading of this vernier pitch chi.