CN201742676U - Device for maintaining tiny change on air humidity in simply sealed cavity under atmospheric conditions - Google Patents
Device for maintaining tiny change on air humidity in simply sealed cavity under atmospheric conditions Download PDFInfo
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- CN201742676U CN201742676U CN2010202957946U CN201020295794U CN201742676U CN 201742676 U CN201742676 U CN 201742676U CN 2010202957946 U CN2010202957946 U CN 2010202957946U CN 201020295794 U CN201020295794 U CN 201020295794U CN 201742676 U CN201742676 U CN 201742676U
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- valve
- airtight cavity
- hole
- sealed cavity
- air bag
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Abstract
The utility model discloses a device for maintaining the tiny change on the air humidity in a simply sealed cavity under the atmospheric conditions, which comprises an air sac and a sealed cavity, wherein the air sac consists of an air sac bag and an air nozzle arranged on the air sac bag, wherein a hole is arranged on the sealed cavity, the air sac is positioned in the sealed cavity, a rubber sealing ring is sheathed and arranged at the bottom part of the air nozzle and is penetrated through the hole arranged on the sealed cavity, the rubber sealing ring seals the air nozzle and the sealed cavity, a flat gasket and an elastic gasket are sequentially arranged on the air nozzle extending out of the hole, and a screw nut is tightly screwed on external threads of the air nozzle, so the air nozzle and the cavity wall of the sealed cavity are tightly connected. The utility model has the advantages of compact structure, simple method, low realization cost and wide application range, and can solve the low-pressure sealing requirement under the atmospheric use conditions.
Description
Technical field
The utility model belongs to the technology that influences cavity inner circuit system operate as normal because of condensation, particularly a kind ofly keeps that gas humidity changes small device in the simple airtight cavity under the atmospheric conditions.
Background technology
Under the atmospheric environment condition, gas in the simple airtight cavity is because variation of ambient temperature, make the interior gas pressure of constant volume cavity be below or above atmospheric pressure, the cell breath of Chan Shenging therefrom, form humid air and enter in the simple airtight cavity and delay even condensation, thereby influence cavity inner circuit system operate as normal.The known gas state equation is pv=zRT, under atmospheric conditions, when simply requiring engineering design, can use The Ideal-Gas Equation pv=RT to adjust.For the gas in the airtight cavity, volume v is constant, and gas constant R is certain, and when ambient temperature changed, the pressure of cavity gas changed thereupon.For keeping pressure balance, air is from the simple airtight cavity of slit turnover, and is the same like people's breathing, usually is called as cell breath.Wet gas enters behind the cavity and can be detained, and during low temperature even condensation ponding, influences cavity inner circuit system operate as normal thus.Utilize air bag to shrink naturally and keep gas and atmosphere outside pressure balance in the cavity, make air no longer from the simple airtight cavity of slit turnover, thereby the gas humidity of keeping in the cavity has only minor variations.
Existing " Mechanical Engineering Design handbook " do not see that use air bag method solves because of the cell breath introduction under atmospheric conditions.Present stage solves simple airtight common method for example:
Method one: with 2 or 2 above main body parts, the main body parts are linked together, form simple airtight cavity, between body element, add the elastic packing material by using securing member or other method.Airtight result of use: use for a long time under the atmospheric conditions, condensation (ponding) phenomenon is arranged in the cavity;
Method two: with 2 or 2 above main body parts, the main body parts are linked together, form simply airtightly, between body element, add the permanent seal cement mass by using securing member or other method.The sealing result of use: use for a long time under the atmospheric conditions, condensation (ponding) phenomenon is arranged in the cavity, and bring part secondary mounting or dismounting difficulty, maintainability is poor.
Method three:, form airtight cavity with 2 or 2 above body element use seal weld methods.Result of use: good seal performance, but part secondary mounting or dismounting difficulty, maintainability extreme difference.
The utility model content
The purpose of this utility model is to provide a kind of and keeps under the atmospheric conditions that gas humidity changes small device in the simple airtight cavity, utilizes air bag to expand naturally and shrinks, and can realize that the interior gas humidity of airtight cavity only has small variation.
The technical scheme that realizes the utility model purpose is: a kind ofly keep under the atmospheric conditions that gas humidity changes small device in the simple airtight cavity, comprise air bag, airtight cavity, air bag is made up of gasbag and the valve that is arranged on the gasbag, a hole is set on the described airtight cavity, air bag is positioned at airtight cavity, in valve bottom suit rubber seal and pass hole on the airtight cavity, rubber seal is with valve, seal between the airtight cavity, set gradually plain washer stretching out on the valve of this hole, elastic washer, and nut is tightened on the external screw thread of valve, the chamber wall of valve and airtight cavity is tightly linked together.
A kind ofly keep that gas humidity changes small device in the simple airtight cavity under the atmospheric conditions, comprise air bag, airtight cavity, air bag is made up of gasbag and the valve that is arranged on the gasbag, a hole only is set on the described airtight cavity, it is external that air bag is positioned at closed chamber, in valve bottom suit rubber seal and pass hole on the airtight cavity, rubber seal is with valve, seal between the airtight cavity, set gradually plain washer putting on the valve of this hole, elastic washer, and nut is tightened on the external screw thread of valve, the chamber wall of valve and airtight cavity is tightly linked together.
The utility model compared with prior art, its remarkable advantage is: (1) compact conformation, method is simple; (2) realization is with low cost; (3) range of application is wider, can solve low pressure seal requirement under the atmosphere service condition.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Fig. 1 is that air bag of the present utility model constitutes schematic diagram.
Fig. 2 is that the utility model air bag is placed on the inboard connection schematic diagram of airtight cavity.
Fig. 3 is that the utility model air bag is placed on the external side connection of closed chamber schematic diagram.
Embodiment
Operation principle of the present utility model: the initial loading timing, suppose that the gaseous state parameter is in the cavity: pressure=p1, volume=v1, absolute temperature=T1, simultaneously, the cavity internal and external pressure balance is an atmospheric pressure.When changing, ambient temperature is T2, by
As can be known: because cavity volume is constant, i.e. v1=v2.Then p2 changes with T2.If T2＜T1, then p2＜p1.For keeping the cavity internal and external pressure balance, extraneous gas enters air bag by the air nozzle hole of air bag; If T2＞T1, then p2＞p1.For keeping the cavity internal and external pressure balance, the gas in the gas compression air bag in the cavity, air bag is discharged into atmosphere through valve.No matter which kind of takes place ambient temperature changes, and can accomplish the inside and outside gas pressure balancing of cavity, thereby guarantee that gas humidity does not change in the cavity.Can after carrying out connection between air bag and the seal chamber, can realize that closed chamber inside and outside gas pressure equates by method shown in the accompanying drawing 2, outside moisture just can't enter in the airtight cavity is detained even condensation.
Air bag is a core apparatus of the present utility model, as shown in Figure 1, air bag is by gasbag 1-1, valve 1-2, gasbag 1-1 requires: material is high temperature resistant, low temperature, long service life, quality softness, THICKNESS CONTROL is best in 0.05～0.1 scope, can select polytetrafluoroethylene film, latex for use as material, the gasbag volume is determined according to airtight cavity volume, the highest minimum environment for use temperature, as a volume v
1m
3Airtight cavity, environment for use maximum temperature are 50 ℃, and minimum temperature is-40 ℃, can be according to formula
Because keep p
1=P
2, v then
2=0.72v
1, v
1, v
2Volume change is about 28%, bag volume V=0.28v
1
Valve 1-2: valve uses metal material to make, and screw thread (M) is contained in the outside, is used for the later stage to be connected with airtight cavity and to prepare; Valve middle part makes a through hole, when gasbag and valve link into an integrated entity, plays the internal action of air turnover gasbag; Valve one end has a ring flange, stops valve to pass gasbag and does not come off, and play later stage air bag and airtight cavity interconnect function.Gasbag 1-1 needs the sealing of check air bag with after valve 1-2 is connected, and requires air except can be passed in and out the gasbag remainder sealing by the through hole on the valve.Just as the inner tube of a tyre of a wheel, gas can only pass in and out in the inner tube of a tyre by valve.
Claims (3)
1. one kind keeps the small device of the interior gas humidity variation of simple airtight cavity under the atmospheric conditions, it is characterized in that comprising air bag (1), airtight cavity (2), air bag (1) is made up of gasbag (1-1) and the valve (1-2) that is arranged on the gasbag (1-1), a hole is set on the described airtight cavity (2), air bag (1) is positioned at airtight cavity (2), in valve (1-2) bottom suit rubber seal (3) and pass hole on the airtight cavity (2), rubber seal (3) is with valve (1-2), sealing between the airtight cavity (2), set gradually plain washer (5) on the valve of this hole (1-2) stretching out, elastic washer (6), and nut (4) is tightened on the external screw thread of valve (1-2), the chamber wall of valve (1-2) and airtight cavity (2) is tightly linked together.
2. one kind keeps the small device of the interior gas humidity variation of simple airtight cavity under the atmospheric conditions, it is characterized in that comprising air bag (1), airtight cavity (2), air bag (1) is made up of gasbag (1-1) and the valve (1-2) that is arranged on the gasbag (1-1), a hole is set on the described airtight cavity (2), air bag (1) is positioned at outside the airtight cavity (2), in valve (1-2) bottom suit rubber seal (3) and pass hole on the airtight cavity (2), rubber seal (3) is with valve (1-2), sealing between the airtight cavity (2), set gradually plain washer (5) on the valve of this hole (1-2) putting in, elastic washer (6), and nut (4) is tightened on the external screw thread of valve (1-2), the chamber wall of valve (1-2) and airtight cavity (2) is tightly linked together.
3. the small device of gas humidity variation in the simple airtight cavity is characterized in that hole diameter and valve (1-2) external diameter equates under the maintenance atmospheric conditions according to claim 1 and 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202957946U CN201742676U (en) | 2010-08-18 | 2010-08-18 | Device for maintaining tiny change on air humidity in simply sealed cavity under atmospheric conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202957946U CN201742676U (en) | 2010-08-18 | 2010-08-18 | Device for maintaining tiny change on air humidity in simply sealed cavity under atmospheric conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201742676U true CN201742676U (en) | 2011-02-09 |
Family
ID=43557955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202957946U Expired - Lifetime CN201742676U (en) | 2010-08-18 | 2010-08-18 | Device for maintaining tiny change on air humidity in simply sealed cavity under atmospheric conditions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201742676U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866585A (en) * | 2010-04-13 | 2010-10-20 | 深圳市锐拓显示技术有限公司 | Pressure balancer for LED display screen |
| WO2017032323A1 (en) * | 2015-08-25 | 2017-03-02 | 太仓市荣驰电机有限公司 | Sealing protection system and method for sealed apparatus |
| CN106669110A (en) * | 2017-03-23 | 2017-05-17 | 江南大学 | Multifunctional breath training device |
| CN107436502A (en) * | 2017-06-12 | 2017-12-05 | 中国电子科技集团公司第五十五研究所 | A kind of method for improving LCD MODULE salt spray resistance |
| CN108684182A (en) * | 2018-08-21 | 2018-10-19 | 高学峰 | A kind of bin |
-
2010
- 2010-08-18 CN CN2010202957946U patent/CN201742676U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866585A (en) * | 2010-04-13 | 2010-10-20 | 深圳市锐拓显示技术有限公司 | Pressure balancer for LED display screen |
| CN101866585B (en) * | 2010-04-13 | 2012-06-20 | 深圳市锐拓显示技术有限公司 | Pressure balancer for LED display screen |
| WO2017032323A1 (en) * | 2015-08-25 | 2017-03-02 | 太仓市荣驰电机有限公司 | Sealing protection system and method for sealed apparatus |
| CN106669110A (en) * | 2017-03-23 | 2017-05-17 | 江南大学 | Multifunctional breath training device |
| CN107436502A (en) * | 2017-06-12 | 2017-12-05 | 中国电子科技集团公司第五十五研究所 | A kind of method for improving LCD MODULE salt spray resistance |
| CN108684182A (en) * | 2018-08-21 | 2018-10-19 | 高学峰 | A kind of bin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110209 |
|
| CX01 | Expiry of patent term |