CN216815301U

CN216815301U - Sphere roundness detection device

Info

Publication number: CN216815301U
Application number: CN202123397604.9U
Authority: CN
Inventors: 林衍飞; 白荣洋; 徐步都; 祝晓宇; 蔡君国
Original assignee: Zhejiang Ruili Air Compressor Equipment Co ltd
Current assignee: Zhejiang Ruili Air Compressor Equipment Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-24
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a sphere roundness detection device, which comprises a measurement device, a measured sphere, a fastening screw, a reference cylinder and a base, wherein the measurement device is used for measuring the roundness of the measured sphere; the measuring device is a dial indicator workbench or a dial indicator workbench. The reference cylinder is placed on the base and fixed through a fastening screw to form a whole and placed on the measuring workbench; the upper end of the reference cylinder is a concave surface, and the diameter of the reference cylinder is the same as that of the measured sphere. The measured sphere is placed on the reference cylinder to rotate freely, and a measuring head of the measuring device is attached to the surface of the measured sphere. The device meets the requirements of the sizes of various spheres, realizes the full coverage of the variety, is convenient to operate, simplifies the roundness test process, greatly shortens the test time, and can quickly measure the actual roundness value of the sphere; the roundness of the ball can be tested by 360 degrees, the detection result is accurate, and the detection reliability is improved to a great extent.

Description

Sphere roundness detection device

Technical Field

The utility model belongs to the field of roundness detection, and particularly relates to a sphere roundness detection device.

Background

Ball valves come out in the 50 th of the 20 th century, and with the rapid development of science and technology and the continuous improvement of production processes and product structures, the ball valves have rapidly developed into a main valve class in as short as 40 years. In countries with developed western industries, the use of ball valves is increasing year by year, and in China, ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemical industry, paper making, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and play a significant role in national economy.

The ball valve is various in types, including a pneumatic ball valve, a manual ball valve, an electric ball valve, an elastic ball valve, a low-temperature ball valve, a high-temperature ball valve and the like, and the main function is to control the connection and the disconnection of a pipeline. However, leakage often occurs during use. The leakage may be caused by various reasons, such as the damaged sealing surface, the rough contact surface between the valve seat and the ball, abrasion, and the damaged O-ring. But in the process of analyzing the failure part, the roundness of the ball body is found to be unqualified and accounts for most of the failure part, and when the roundness of the ball body is unqualified, abnormal extrusion can be caused to a sealing surface in the rotating process, so that the abrasion of the sealing surface is aggravated, and the product leakage is caused.

At present, various roundness detection modes such as a roundness meter and a three-coordinate device are adopted, but the devices are expensive, complicated to test and incapable of being popularized in batches, and the roundness of a ball cannot be detected in batches on the basis of the above defects, so that the reliability of the ball valve is restricted.

Therefore, how to simplify the roundness detection method is called as a technical problem which needs to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sphere roundness detection device aiming at the defects of the prior art.

The purpose of the utility model is realized by the following technical scheme: a sphere roundness detection device comprises a measuring device, a measured sphere, a fastening screw, a reference cylinder and a base;

the reference cylinder is placed on the base and fixed through a fastening screw to form a whole and placed on the measuring workbench; the measured sphere is placed on the reference cylinder to rotate freely, and a measuring head of the measuring device is attached to the surface of the measured sphere.

Further, the measuring device is a dial indicator workbench or a dial indicator workbench.

Furthermore, the upper end of the reference cylinder is a concave surface, and the diameter of the reference cylinder is the same as that of the measured sphere.

The utility model has the beneficial effects that:

1. the device is convenient to operate, the roundness testing process is simplified, the testing time is greatly shortened, and the actual roundness value of the sphere can be quickly measured;

2. the device has low price, can be popularized and reduces the economic cost of manufacturers;

3. compared with a roundness meter or three-coordinate high-end equipment and the like, the roundness of the sphere can be tested at 360 degrees, the detection result is accurate, the detection reliability is improved to the greatest extent, and the roundness meter or three-coordinate equipment can only measure a local position;

4. in order to meet the size of various spheres, the standard cylinders with different specifications are replaced, so that the full coverage of the spheres is realized; 5. the device has simple structure, and is convenient for the maintenance and overhaul of customers

Drawings

FIG. 1 is a schematic view of the structure of the apparatus of the present invention.

FIG. 2 is a perspective view of the device of the present invention

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, which can be derived by a person skilled in the art from a single embodiment of the utility model without inventive step, are within the scope of the utility model.

As shown in fig. 1 and fig. 2, the sphere roundness detection device provided by the present invention comprises a measuring device 1, a measured sphere 2, a fastening screw 3, a reference cylinder 4 and a base 5;

the measuring device 1 is a dial indicator workbench or a dial indicator workbench. The reference cylinder 4 is placed on the base 5 and fixed through the fastening screw 3 to be integrally placed on the measuring workbench 1; the upper end of the reference cylinder 4 is a concave surface, and the diameter of the reference cylinder is the same as that of the measured sphere 2. The measured sphere 2 is placed on the reference cylinder 4 to rotate freely, and the measuring head of the measuring device 1 is attached to the surface of the measured sphere 2.

The working principle of the utility model is as follows:

checking a reference cylinder: as can be seen from fig. 1, the sphere 2 to be measured is placed on the reference cylinder 4, so that the concave surface of the reference cylinder 4 is directly connected with the sphere 2 to be measured, and the concave surface of the reference cylinder 4 needs to be made to have the same diameter as the sphere 2 to be measured, and the roundness value of the concave surface directly affects the measurement result. Therefore, the concave roundness value of the reference cylinder 4 needs to be accurately measured during acceptance check, so that the concave roundness value meets the use requirement, and the measurement error of the measured ball 2 is avoided;

and (3) roundness testing: placing the measured ball 2 on the reference cylinder 4, attaching the measuring head of the dial indicator to the surface of the measured ball 2, and rotating the measured ball arbitrarily to measure the roundness of the product through the dial indicator;

variety full coverage: as can be seen from fig. 1, the reference cylinder 4 is fastened by the fastening screw 3, when balls with different specifications need to be tested, only the fastening screw 3 needs to be unscrewed, the corresponding reference cylinder 4 is replaced, and finally the fastening screw 3 is fastened;

the precision requirement is as follows: because different spheres have different requirements on roundness, when the accuracy of the dial indicator cannot meet the testing requirements, the dial indicator with higher accuracy can be replaced, and the dial indicator and other testing methods can still refer to the content;

the above-described embodiments are intended to illustrate rather than to limit the utility model, and any modifications and variations of the present invention are within the spirit of the utility model and the scope of the appended claims.

Claims

1. The sphere roundness detection device is characterized by comprising a measuring device (1), a measured sphere (2), a fastening screw (3), a reference cylinder (4) and a base (5);

the reference cylinder (4) is placed on the base (5) and fixed through the fastening screw (3) to be integrally placed on the measuring workbench; the measured sphere (2) is placed on the reference cylinder (4) to rotate freely, and a measuring head of the measuring device (1) is attached to the surface of the measured sphere (2).

2. The sphere roundness detecting apparatus according to claim 1, wherein the measuring apparatus (1) is a dial gauge table or a dial gauge table.

3. The sphere roundness detection apparatus according to claim 1, wherein the reference cylinder (4) has a concave upper end and a diameter the same as that of the sphere (2) to be detected.