CN2234084Y - Air-flow type dush protective cover for electronic balance - Google Patents
Air-flow type dush protective cover for electronic balance Download PDFInfo
- Publication number
- CN2234084Y CN2234084Y CN 95215443 CN95215443U CN2234084Y CN 2234084 Y CN2234084 Y CN 2234084Y CN 95215443 CN95215443 CN 95215443 CN 95215443 U CN95215443 U CN 95215443U CN 2234084 Y CN2234084 Y CN 2234084Y
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- cover
- air
- electronic balance
- flow type
- protective cover
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Abstract
The utility model provides an air-flow type dust protective cover for an electronic balance. The air-flow type dust protective cover for an electronic balance is especially suitable in the interstice of the force arm rod of the electronic balance and an element box body for preventing dust from entering the box body. The air-flow type dust protective cover for an electronic balance belongs to a dust protective device. The air-flow type dust protective cover for an electronic balance is composed of an outer cover, an inner cover, an air inlet pipe, and an air pump. The inner and the outer covers are conic space with an interlayer. Airflow is surrounded in the cover. An annular vortex flow layer formed between an outlet on the upper end and the force arm rod is used as a barrier for preventing dust from entering the box.
Description
The utility model proposes a kind of air-flow dust cover, be specially adapted to the gap of the arm bar and the element casing of electronic scales, prevent that dust from entering casing, belong to a kind of dust guard.
Present electronic scales or be that the powder racking machine of weighing utensil uses in some enterprises with the electronic scales.Adopted this type of electronic scales weighing racking machine as synthetic detergent factory packing washing powder, food factory's packing milk powder etc.The basic structure of this electronic scales be by stretch out in the scale case can be up and down arm bar, arm bar one end connects weighing plate, the other end is connected pressure transducer and the electronic control board in the casing, therefore certainly exist certain clearance between arm bar and casing, be generally the 2-5 millimeter, so that make the arm bar can be up and down.The sealing ring of any lock ring cannot be installed in this gap, otherwise arm bar is fixed, and then can't carry out weighing.And this gap becomes the passage that dust enters casing.Particularly in the packing shop working environment, dust is many, and the material dust enters behind the casing from this gap and builds up gradually, causes electronic component such as sensor control panel to be corroded and damages, and influence the accuracy of weighing, and the serviceable life of reduction electronic scales.
The purpose of this utility model is at this defective that is present in electronic scales at present, invades casing in order to stop the material dust, protection electronic component and a kind of air-flow dust cover of designing guarantees that the service precision of electronic scales also prolongs its serviceable life.
Design proposal of the present utility model is: a kind of air-flow dust cover that is used for electronic scales, it is characterized in that, and form by outer cover, inner cover, draft tube and air pump.Outer cover is that a section is trapezoidal circular cone tube, inner cover is a cylindrical drum, the diameter of inner cover cylindrical drum is less than the diameter of outer cover circular cone tube, two cover feather edges are two concentric circless, making in its upper end, two jacket casings dress back has 0.3-0.8 millimeter slit between cover outer wall and outer cover inwall, is sealed by annular flat board between inside and outside two cover feather edges, forms the circular cone cover of an interlayer, in the outer cover lower end one through hole is arranged, connect a draft tube and be connected on the air delivery pump.
Effect of the present utility model: this dust cover is sleeved on the electronic scales arm bar; the bottom is connected on the casing; owing to adopt the conical seal closure of interlayer; by air pump air is sent in the cover continuously, in the dust cover air-flow in cover around, formation ring-type eddy airstream layer between outlet of dust cover upper end and arm bar; this airflow layer is a dustproof barrier; stop dust to enter casing, thereby element in the protection casing reach sealing effectiveness by the gap.(patent No.: ZL93200887.9), this air-flow dust cover device is installed, has been stopped dust and entered casing, result of use is good for the washing powder right angle four steps rotating electron weighing racking machine that uses in Beijing daily use chemicals two factories.
Below accompanying drawing is illustrated:
Fig. 1 is a kind of section of structure that is used for the air-flow dust cover of electronic scales.
Fig. 2 is a kind of structure vertical view that is used for the air-flow dust cover of electronic scales.
Fig. 3 is the electronic scales structural representation that the air-flow dust cover is housed.
Below in conjunction with accompanying drawing for an embodiment:
A kind of air-flow dust cover that is used for electronic scales is made up of outer cover (1), inner cover (2), draft tube (3) and air pump (4), as shown in Figure 1 and Figure 2.It is characterized in that: outer cover is that a section is trapezoidal circular cone column casing, and cone angle is 60 degree, and inner cover is a cylindrical tube, the inner cover diameter is less than the outer cover diameter, two cover feather edges are two concentric circless, make two enclosures dresses after, 0.5 millimeter slit is arranged between cover outer wall and outer cover inwall in its upper end.By the dull and stereotyped sealing of an annular, form the circular cone cover of an interlayer between inside and outside two cover feather edges, in the outer cover lower end one through hole is arranged, connect a draft tube and be connected on the glued membrane air pump, admission pressure is 0.002MPa.This air-flow dust cover is sleeved on the electronic scales arm bar when using as shown in Figure 3.Arm bar among the figure (5) upper end links to each other with the scale pan (6); the lower end links to each other with pressure transducer (7), between arm bar (5) and the casing (8) 2-3 millimeter gap is arranged, load onto dust cover (9) after; the ring-type eddy airstream stops dust to enter in the case through the gap, and element and circuit are avoided damaging in the guard box.The utility model except that being used for electronic scales, also can be used for having the slit can not the situation of lock ring under, prevent that dust from entering the slit.
Claims (3)
1, a kind of air-flow dust cover that is used for electronic scales, it is characterized in that, form by outer cover, inner cover, draft tube and air pump, outer cover is that a section is trapezoidal circular cone tube, inner cover is a cylindrical drum, the diameter of inner cover cylindrical drum is less than the diameter of outer cover circular cone tube, two cover feather edges are two concentric circless, make in its upper end, two jacket casings dress back and between cover outer wall and outer cover inwall 0.3-0.8 millimeter slit is arranged, seal by an annular is dull and stereotyped between inside and outside two cover feather edges, form the circular cone cover of an interlayer, one through hole is arranged, connect a draft tube to air delivery pump in the outer cover lower end.
2, a kind of air-flow dust cover that is used for electronic scales as claimed in claim 1 is characterized in that the outer cover cone angle is 60 °.
3, a kind of air-flow dust cover that is used for electronic scales as claimed in claim 1 is characterized in that air pump is the glued membrane air pump, and pressure is 0.002MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215443 CN2234084Y (en) | 1995-07-05 | 1995-07-05 | Air-flow type dush protective cover for electronic balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215443 CN2234084Y (en) | 1995-07-05 | 1995-07-05 | Air-flow type dush protective cover for electronic balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2234084Y true CN2234084Y (en) | 1996-08-28 |
Family
ID=33864800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95215443 Expired - Fee Related CN2234084Y (en) | 1995-07-05 | 1995-07-05 | Air-flow type dush protective cover for electronic balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2234084Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102165291B (en) * | 2008-11-08 | 2013-10-23 | 赛多利斯称量技术有限责任公司 | Weighing cell and method for sealing weighing cell |
| CN105652054A (en) * | 2016-02-24 | 2016-06-08 | 青岛乾程科技股份有限公司 | Intelligent ammeter with integrated structure |
-
1995
- 1995-07-05 CN CN 95215443 patent/CN2234084Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102165291B (en) * | 2008-11-08 | 2013-10-23 | 赛多利斯称量技术有限责任公司 | Weighing cell and method for sealing weighing cell |
| CN105652054A (en) * | 2016-02-24 | 2016-06-08 | 青岛乾程科技股份有限公司 | Intelligent ammeter with integrated structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |