一种测量钟罩内外径尺寸装置
By combining five positioning blocks and a positioning steel ruler, and using magnetic blocks for adsorption and bubble level calibration, the problem of the ruler not being able to maintain the same cross-section in the measurement of bell jar diameter is solved, improving the accuracy and reliability of the measurement. It is suitable for various bell jar materials and wall thicknesses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO INST OF METROLOGY & MEASUREMENT NINGBO WEIGHING APP ADMINISTATION OFFICE
- Filing Date
- 2025-10-14
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, it is difficult to ensure that the precision measuring scale is always at the same cross-section when measuring the diameter of the bell jar, which leads to measurement errors and affects the accuracy of volume calculation.
A combination of five positioning blocks and a positioning steel ruler is used. The blocks are magnetically attached to the surface of the bell jar and the level of the positioning blocks is calibrated by a bubble level. Combined with the design of the positioning steel ruler, it ensures that the precision ruler always measures on the same cross-section during measurement.
It significantly improves the accuracy and reliability of measurement data, has a simple structure, low cost and easy operation, and is suitable for bell jars of different materials and wall thicknesses.
Smart Images
Figure CN224517627U_ABST
Abstract
Claims
1. A device for measuring the internal and external diameter of a bell jar, characterized in that, The device includes five positioning blocks (1), one side of which is provided with a guide groove (2) and two sets of magnet blocks (3). The guide groove (2) is located between the two sets of magnet blocks (3). A bubble level (4) is fixedly installed on the positioning block (1). The device also includes a set of positioning steel rulers (5). A square hole (6) is opened on the positioning block (1) that runs through the front and back. The positioning steel ruler (5) can pass through the square hole (6) and pass through the interior of the positioning block (1).
2. The apparatus of claim 1, wherein, The cross-sectional dimensions of the positioning steel ruler (5) are 1mm×15mm, and the dimensions of the square hole (6) are 2mm×15mm.
3. The apparatus of claim 2, wherein, The positioning steel ruler (5) is made of spring steel strip, which allows it to remain partially straight when passing through the square hole (6) and conform to the cylindrical curved surface of the bell cover.
4. The apparatus of claim 1, wherein, An adjustable handle (7) is fixedly connected to the positioning block (1).
5. The apparatus of claim 1, wherein, The magnet block (3) is made of stainless steel and is embedded in the groove (8) on one side of the positioning block (1).
6. The apparatus of claim 5, wherein, The magnet block (3) is slidably embedded inside the groove (8). A threaded sleeve (9) is provided on one side of the positioning block (1). An adjusting screw (10) is connected to the internal thread of the threaded sleeve (9). One end of the adjusting screw (10) extends out of the outside of the positioning block (1), and the other end of the adjusting screw (10) extends inward into the groove (8) and is rotatably connected to the magnet block (3).