CN203259243U

CN203259243U - High-precision electronic balance pan shielding ring

Info

Publication number: CN203259243U
Application number: CN 201320216634
Authority: CN
Inventors: 陈方
Original assignee: Sartorius Scientific Instruments Beijing Co Ltd
Current assignee: Sartorius Scientific Instruments Beijing Co Ltd
Priority date: 2013-04-26
Filing date: 2013-04-26
Publication date: 2013-10-30
Anticipated expiration: 2023-04-26

Abstract

The utility model relates to a high-precision electronic balance pan shielding ring, and particularly to an electromagnetism and pollutant shielding ring. The high-precision electronic balance pan shielding ring is characterized in that the shielding ring is a single annular component and is made of conductive material. Furthermore, the height of the peripheral part of the balance pan shielding ring is 8mm. Furthermore, the shielding ring has a flat bottom and grooves in and out the bottom. Furthermore, the periphery of the inner ring is provided with a blocking wall which is higher than the groove for 3mm. Furthermore, the integral thickness of the shielding ring is 0.6-1 millimeter. The shielding ring is an annular sheet metal component which is formed through one-time punching, and is positioned and placed above a base plate of a windproof cover and below a balance pan through a central hole. The periphery of the shielding ring surrounds the circumference of the balance pan. Functions such as electromagnetic shielding and weighing sample pollution shielding are realized through a special shape. Compared with a balance on which a windproof cover is only added, the high-precision electronic balance pan shielding ring can further improve weighing precision and weighing speed.

Description

High Accuracy Electronic Balance scale pan shading ring

Technical field

The utility model relates to a kind of electronic balance scale pan shading ring.

Background technology

In high precision weighing field, flow perturbation and electromagnetic interference (EMI) have very large impact to weighing result, although hurricane globe has been avoided most of flow perturbation and a part of electromagnetic interference (EMI), when needs further improve the weighing degree of accuracy, only depend on hurricane globe to meet the demands.The high precision balance belongs to expensive instrument in addition, is maloperation but have unavoidably the people in the general weighing process, cause to be claimed liquid or dust to be retained in bad cleaning in the hurricane globe, and these powder and liquid can partly enter balance inside, and the balance performance is impacted.

The utility model content

The utility model has solved above problem, adds this shading ring between the scale pan and hurricane globe base plate, can effectively shield very micro-electromagnetic interference (EMI) and the disturbance of hurricane globe internal gas flow, guarantees weighing precision; The thing pollution that is weighed that causes for maloperation in the use procedure also has extraordinary shielding action, thereby avoids the performance of balance own to be subject to pollution damage; Because this shading ring is not to adopt screw to be fixed on the hurricane globe base plate and small volume, therefore very convenient dismounting cleaning.

The utility model function mainly is achieved through the following technical solutions:

A kind of high Accuracy Electronic Balance scale pan shading ring, especially electromagnetism and pollutant shading ring is characterized in that this shading ring is a single annular construction member, is made by conductive material.Further, the periphery of this scale pan shading ring highly is 8mm.And then this shading ring has the inside and outside groove of flat bottom and bottom.And then described inner circumference is with barricade, and barricade exceeds 3mm than groove.And then the integral thickness of this shading ring is the 0.6-1 millimeter.

The highly about 8mm in shading ring periphery, be lower than scale pan 2mm, so that this projection is peripheral the scale pan one circle is surrounded, be positioned on the hurricane globe base plate, shading ring contacts conducting with the hurricane globe base plate, therefore electromagnetic interference (EMI) can be isolated in outside the shading ring and can not affect the weighing value, and static can import the hurricane globe base plate with shading ring and leads away, has namely at utmost guaranteed effectiveness.The periphery highly only is lower than scale pan height 2mm, therefore comes from the flow perturbation conductively-closed of side direction.

Gap between shading ring projection periphery and the scale pan is about 2mm, during weighing because the unrestrained shading ring bottom that all can fall into from described gap of the sample that maloperation causes, the groove of shading ring bottom and projection can largely hinder unrestrained sample and move towards the shading ring center, even flow into shading ring than relatively large liquid, also can encircle highly for the barricade of 3mm blocks in the conductively-closed ring, can not flow into balance inside.

Projection location on the inner ring of this shading ring and the hurricane globe can easily be taken out radome and be cleaned when having sample unrestrained, very convenient.

Description of drawings:

Fig. 1 is Sai Duolisi BSA balance general assembly drawing

Fig. 2 is shading ring

Fig. 3 is the shading ring sectional view

Fig. 4 is that shading ring is followed hurricane globe and scale pan assembling section.

The part that Reference numeral represents among the figure is as follows:

1. shading ring is peripheral; 2-1. groove; The 2-2 groove; 3. bottom the shading ring; 4. barricade; 5. shading ring; 6. the scale pan; 7. hurricane globe base plate.

Embodiment:

Embodiment; Choose the thick corrosion resistant plate of 0.8mm through a punching press and the formation shading ring shown in Figure 2 of cutting edge, shading ring is put on the hurricane globe base plate, and the center pit outer wall of ring alignment hurricane globe base plate is put scale pan support again with the scale pan in the radome.

Claims

1. high Accuracy Electronic Balance scale pan shading ring, especially electromagnetism and pollutant shading ring is characterized in that this shading ring is a single annular construction member, is made by conductive material.

2. scale pan shading ring as claimed in claim 1 is characterized in that the periphery (1) of this scale pan shading ring highly is 8mm.

3. scale pan shading ring as claimed in claim 1 or 2 is characterized in that this shading ring has flat bottom (3) and bottom (3) inside and outside groove (2-1,2-2).

4. scale pan shading ring as claimed in claim 3 is characterized in that described inner circumference is with barricade (4), and barricade exceeds 3mm than groove (2-1,2-2).

5. scale pan shading ring as claimed in claim 4, the integral thickness that it is characterized in that this shading ring is the 0.6-1 millimeter.