阅读说明：本技术 一种检测小径管弯头椭圆度的检验尺 (Inspection ruler for detecting ovality of small-diameter pipe elbow ) 是由 张广兴 高昕 王灿文 宋旭东 张圣喜 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种检测小径管弯头椭圆度的检验尺,包括主尺,所述主尺上设有测量爪一、测量爪二,所述测量爪一、测量爪二位于所述主尺的同一侧,所述测量爪一、测量爪二均与所述主尺滑动连接,所述测量爪一平行于所述测量爪二,所述测量爪一与数显游标连接,所述测量爪一上设有紧固螺丝一,所述测量爪二上设有紧固螺丝二。本发明的检测小径管弯头椭圆度的检验尺通过设置可沿主尺滑动的测量爪一和测量抓二,在测量爪一上设置数显游标,从而使得在测量椭圆度时,不需要找最大直径和最小直径,直接测量差值,减少了计算过程,进而达到降低测量误差、提高检测效率的目的。(The invention discloses a detection ruler for detecting ovality of a small-diameter pipe elbow, which comprises a main ruler, wherein a first measurement claw and a second measurement claw are arranged on the main ruler, the first measurement claw and the second measurement claw are positioned on the same side of the main ruler, the first measurement claw and the second measurement claw are both in sliding connection with the main ruler, the first measurement claw is parallel to the second measurement claw, the first measurement claw is connected with a digital display vernier, a first fastening screw is arranged on the first measurement claw, and a second fastening screw is arranged on the second measurement claw. According to the inspection ruler for detecting the ovality of the small-diameter pipe elbow, the first measuring claw and the second measuring claw which can slide along the main ruler are arranged, and the digital display vernier is arranged on the first measuring claw, so that the difference value is directly measured without finding the maximum diameter and the minimum diameter when the ovality is measured, the calculation process is reduced, and the purposes of reducing the measurement error and improving the detection efficiency are achieved.)

1. The utility model provides a detect inspection chi of path pipe elbow ovality, its characterized in that, includes main scale (1), be equipped with on main scale (1) and measure claw (2), measure claw two (3), measure claw (2), measure claw two (3) and be located same one side of main scale (1), measure claw (2), measure claw two (3) all with main scale (1) sliding connection, measure claw (2) be on a parallel with measure claw two (3), measure claw (2) and be connected with digital display vernier (4), be equipped with fastening screw one (5) on the measuring claw (2), be equipped with fastening screw two (6) on the measuring claw two (3).

2. The inspection ruler for detecting ovality of a small-diameter pipe elbow according to claim 1, characterized in that the first measuring claw (2) is perpendicular to the main ruler (1).

3. The inspection ruler for detecting ovality of a small-diameter pipe elbow according to claim 1, characterized in that the second measuring claw (3) is perpendicular to the main ruler (1).

4. The ruler of claim 1, wherein the first measuring jaw (2) and the second measuring jaw (3) are equal in length.

5. The ruler of claim 1, wherein the cross section of the first measuring jaw (2) and the cross section of the second measuring jaw (3) are both rectangular.

6. The inspection ruler for detecting ovality of a small-diameter pipe elbow according to claim 1, characterized in that a scale is provided on one side of the main ruler (1).

7. The inspection ruler for detecting ovality of a small-diameter pipe elbow according to claim 1, characterized in that the cross section of the main ruler (1) is rectangular.

8. The inspection ruler for detecting the ovality of the small-diameter pipe elbow according to claim 1, wherein a digital display component is arranged on the digital display vernier (4).

9. The ruler of claim 8, wherein the digital display module comprises a digital display screen.

10. The ruler of claim 9, wherein a zeroing button is disposed under the digital display screen.

Technical Field

The invention relates to the technical field of ovality measurement, in particular to a detection ruler for detecting ovality of a small-diameter pipe elbow.

Background

The small diameter tubes of the boiler, except for the water wall tubes used as furnace walls, the straight tubes for suspension and the superheater tubes covered with walls, are mostly in the form of tube banks consisting of a plurality of tubes, and most of the tubes have elbows, which are 90-degree and 180-degree elbows.

If the ovality of the small-diameter pipe elbow is too large, the ball passing test cannot be passed during installation, and the resistance is also increased during medium circulation, so that the standard has a requirement on the ovality of the small-diameter pipe.

The formula for ovality is: the maximum and minimum diameter difference of the elbow cross section is divided by the nominal diameter of the straight pipe. The nominal diameter of the straight pipe is known, so that the maximum diameter and the minimum diameter of the elbow are measured during detection, and the ovality of the elbow can be obtained.

For manufacturing reasons, the maximum and minimum diameters of the cross-section are not necessarily perpendicular to each other, and it is important to obtain the maximum and minimum diameters at the time of measurement. The existing device for detecting the ovality has the problems of low detection efficiency and poor accuracy.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a detection ruler for detecting the ovality of a small-diameter pipe elbow, which can overcome the defects in the prior art.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:

the utility model provides a detect inspection chi of path pipe elbow ovality, includes the main scale, be equipped with on the main scale and measure claw one, measure claw two, measure claw one, measure claw two and be located the same one side of main scale, measure claw one, measure claw two all with main scale sliding connection, measure claw one be parallel to measure claw two, measure claw one and digital display vernier connection, be equipped with fastening screw one on measuring claw one, be equipped with fastening screw two on measuring claw two.

Further, the first measuring claw is perpendicular to the main scale.

Further, the second measuring claw is perpendicular to the main scale.

Further, the length of the first measuring claw is equal to that of the second measuring claw.

Furthermore, the cross section of the first measuring claw and the cross section of the second measuring claw are both rectangular.

Furthermore, one side of the main scale is provided with scales.

Further, the cross section of the main ruler is rectangular.

Furthermore, a digital display component is arranged on the digital display vernier.

Further, the digital display component comprises a digital display screen.

Furthermore, a zeroing key is arranged below the digital display screen.

The invention has the beneficial effects that: according to the inspection ruler for detecting the ovality of the small-diameter pipe elbow, the first measuring claw and the second measuring claw which can slide along the main ruler are arranged, and the digital display vernier is arranged on the first measuring claw, so that the difference value is directly measured without finding the maximum diameter and the minimum diameter when the ovality is measured, the calculation process is reduced, and the purposes of reducing the measurement error and improving the detection efficiency are achieved; the inspection ruler for detecting the ovality of the small-diameter pipe elbow can ensure that the measurement is carried out on the same section, and has the advantages of simple structure, low manufacturing cost and simple operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of a ruler for detecting ovality of a small-diameter pipe elbow according to an embodiment of the present invention;

in the figure: 1. the device comprises a main ruler 2, a first measuring claw 3, a second measuring claw 4, a digital display vernier 5, a first fastening screw 6 and a second fastening screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

As shown in fig. 1, the inspection ruler for detecting ovality of a small-diameter pipe elbow according to the embodiment of the present invention is similar in shape to п, and includes a main ruler 1, the main ruler 1 is provided with a first measuring jaw 2 and a second measuring jaw 3, the first measuring jaw 2 and the second measuring jaw 3 are located on the same side of the main ruler 1, the first measuring jaw 2 and the second measuring jaw 3 are both connected with the main ruler 1 in a sliding manner, the first measuring jaw 2 is parallel to the second measuring jaw 3, the first measuring jaw 2 is connected with a digital display vernier 4, the first measuring jaw 2 is provided with a first fastening screw 5, the second measuring jaw 3 is provided with a second fastening screw 6, the first measuring jaw 2 and the second measuring jaw 3 are both perpendicular to the main ruler 1, the first measuring jaw 2 and the second measuring jaw 3 are equal in length, the cross section of the first measuring jaw 2 and the cross section of the second measuring jaw 3 are both rectangular, one side of the main ruler 1 is provided with scales, the cross section of the main ruler 1 is provided with a digital display module, the digital display module 4 includes a digital display screen, and the digital display screen is disposed below the digital display screen.

The main ruler 1, the first measuring claw 2, the second measuring claw 3, the first fastening screw 5 and the second fastening screw 6 are all made of materials which are high in rigidity and hardness and not prone to deformation, the first fastening screw 5 is used for fixing the first measuring claw 2, the second fastening screw 6 is used for fixing the second measuring claw 3, and the first measuring claw 2 and the second measuring claw 3 are perpendicular to the main ruler 1 so as to guarantee measuring accuracy.

In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.

When the inspection ruler is used specifically, the first fastening screw is screwed down, the first measuring claw is fixed, and the first measuring claw slides towards one side of the main ruler, so that the first measuring claw and the second measuring claw of the inspection ruler clamp the relatively short direction of the section of the elbow; the first measuring claw keeps contact with the elbow, then the testing ruler is slowly rotated, the testing ruler is enabled to rotate 180 degrees around the tested elbow, when the diameter of the section is increased, the second measuring claw continues to slide towards the far end, when the diameter of the section is decreased, the two positions of the second measuring claw are not moved until the maximum diameter is obtained, and the second fastening screw is tightened; and loosening the first fastening screw, clamping the two measuring claws (the first measuring claw and the second measuring claw) by two fingers, slowly rotating the inspection ruler for 180 degrees, keeping the first measuring claw and the second measuring claw in contact with the elbow, and observing the reading of the digital display vernier in the rotating process, wherein the maximum value is the difference between the maximum diameter and the minimum diameter of the cross section. The inspection ruler belongs to an accurate measuring tool and should be properly stored after being used.

According to the calculation formula of the ovality of the small-diameter pipe elbow, the ovality of the elbow can be obtained through calculation by obtaining the difference between the maximum diameter and the minimum diameter of the cross section, and compared with the maximum diameter and the minimum diameter of the traditional measurement elbow, the detection ruler for detecting the ovality of the small-diameter pipe elbow can directly obtain the difference between the maximum diameter and the minimum diameter through measurement.

In summary, according to the above technical solution of the present invention, by arranging the first measuring claw and the second measuring claw which can slide along the main scale, and arranging the digital display vernier on the first measuring claw, when measuring the ovality, the difference is directly measured without finding the maximum diameter and the minimum diameter, thereby reducing the calculation process, and further achieving the purposes of reducing the measurement error and improving the detection efficiency; the inspection ruler for detecting the ovality of the small-diameter pipe elbow can ensure that the measurement is carried out on the same section, and has the advantages of simple structure, low manufacturing cost and simple operation.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.