CN204459149U - The gas-tight door gasket structure of low air pressure test chamber - Google Patents
The gas-tight door gasket structure of low air pressure test chamber Download PDFInfo
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- CN204459149U CN204459149U CN201520093299.XU CN201520093299U CN204459149U CN 204459149 U CN204459149 U CN 204459149U CN 201520093299 U CN201520093299 U CN 201520093299U CN 204459149 U CN204459149 U CN 204459149U
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Abstract
The utility model discloses a kind of gas-tight door gasket structure of low air pressure test chamber, it is characterized in that: described Stamping Steel Ribbon comprises assembly department and variant part, the cross section of described assembly department is trapezium structure, the side, cross section of described variant part is provided with the first sealed department of outward-dipping extension, opposite side is the second sealed department of arc surface, and the section width of described first sealed department reduces from bottom to up gradually.The utility model improves the sealability of Stamping Steel Ribbon by first, second sealed department, low air pressure test chamber is closed to drive gas-tight door without the need to arranging bolt or handwheel, reduce difficulty of processing, save cost, laborsaving, thus improve usability and the comfort level of low air pressure test chamber, extend the working life of Stamping Steel Ribbon.
Description
Technical field
The utility model relates to sealing configuration, is specifically related to a kind of gas-tight door gasket structure of low air pressure test chamber.
Background technique
Low air pressure test chamber is the test casing for simulated high altitude amblent air temperature or high-altitude (30000 meters) environment; This casing not only requires pressure low (minimum to 100Pa), also will meet high temperature (200 DEG C) and low temperature (-70 DEG C) requirement simultaneously.The casing of low air pressure test chamber is provided with the gas-tight door of a hinge, is provided with the Stamping Steel Ribbon for the gas-tight door sealed between casing and gas-tight door, and the sealability of Stamping Steel Ribbon not only affects the usability of casing, also affects the comfort level that casing uses.
The Stamping Steel Ribbon of current employing mainly contains two kinds of structures, and a kind of is inflatable seal bar, and namely Stamping Steel Ribbon is hollow-core construction, after gas-tight door cuts out, inflates in Stamping Steel Ribbon, makes Stamping Steel Ribbon expand and reach the object of sealing.But the dense strip of paper used for sealing of this inflating air is more responsive to temperature, the inadaptable low air pressure test chamber very large with temperature variation, this kind of structure is mainly used in the industry such as medical treatment, pharmacy.
Another kind is that the rubber of circular cross section or trapezoidal cross-section structure forms Stamping Steel Ribbon, namely when closing gas-tight door, with certain force compresses Stamping Steel Ribbon, thus reaches the object of sealing.But this structure exists following shortcoming: first, the potted line of low air pressure test chamber and gas-tight door is very long, needs very large pretightening force when closing gas-tight door, and therefore need design bolt or handwheel pressure gas-tight door, operation quite bothers; Secondly, owing to extruding too severe when rubber is pressed, be easy to aging following the string, shorten working life, the modification amount after therefore compressing generally designs within 30%, and designing requirement is high, and cost is high; Stamping Steel Ribbon is too high simultaneously easily falls partially, causes during pneumatic test and leaks gas, so the modification of Stamping Steel Ribbon is just limited, just higher to the level requirements of gas-tight door and casing two sealing surfaces, add the manufacture cost of product so greatly.
Summary of the invention
The purpose of this utility model is the step in order to overcome prior art, provides a kind of gas-tight door gasket structure of low air pressure test chamber, and structure is simple, and good seal performance, laborsaving, cost is low, long service life.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of gas-tight door gasket structure of low air pressure test chamber, it is characterized in that: described Stamping Steel Ribbon comprises assembly department and variant part, the cross section of described assembly department is trapezium structure, the side, cross section of described variant part is provided with the first sealed department of outward-dipping extension, opposite side is the second sealed department of arc surface, and the section width of described first sealed department reduces from bottom to up gradually.
The section of described first sealed department is triangular in shape
The section of described first sealed department is acute triangle.
The center line of described first sealed department and the centerlines α of variant part are 30 ~ 60 °.
The center line of described first sealed department and the centerlines α of variant part are 45 °.
The dual-side of described Stamping Steel Ribbon assembly department is hypotenuse.
Described Stamping Steel Ribbon is rubber strip.
The beneficial effects of the utility model: Stamping Steel Ribbon of the present utility model comprises assembly department and variant part, the cross section of described assembly department is trapezium structure, being convenient to Stamping Steel Ribbon is arranged in seal groove, the side, cross section of described variant part is provided with the first sealed department of outward-dipping extension, first sealed department is soft, and in humid test or when vacuumizing beginning, gas-tight door is only pressed in the first sealed department, by the first sealed department, low air pressure test chamber is sealed, and do not need too large power to drive gas-tight door to close; Opposite side is the second sealed department of arc surface, when doing low air pressure test, along with the pressure in low air pressure test chamber constantly reduces, very large power is produced by the air outside low air pressure test chamber and the pressure reduction in case, gas-tight door is squeezed on the second sealed department arc surface of Stamping Steel Ribbon, the intensity of whole arc surface is larger, this ensures that theres the hermetic seal under lowpressure state.Therefore the utility model improves the sealability of Stamping Steel Ribbon by first, second sealed department, closing low air pressure test chamber without the need to arranging bolt or handwheel to drive gas-tight door, reducing difficulty of processing, having saved cost, laborsaving, thus improve usability and the comfort level of low air pressure test chamber.And described Stamping Steel Ribbon is rubber strip, the first sealed department adopts rubber flexible material to make, and during closedown, the first sealed department softness can nature deflection, would not should be compression and aging like this, extend the working life of Stamping Steel Ribbon.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation under the utility model assembling condition.
Embodiment
Below in conjunction with accompanying drawing, this practicability is further described.
Shown in Fig. 1 and Fig. 2, a gas-tight door gasket structure for low air pressure test chamber, described Stamping Steel Ribbon comprises assembly department 1 and variant part 2, and the assembly department 1 of described Stamping Steel Ribbon and variant part 2 are for adopting the integrated rubber strip of rubber, rubber is softer, and elastic strain is large; The cross section of described assembly department 1 is trapezium structure, upper base is less than handle, the dual-side of assembly department 1 is hypotenuse, and be provided with radian between two hypotenuses and base, this radian matches with the circular arc of the concave sealing groove 3 of low air pressure test chamber, ensure that installation is not interfered, Stamping Steel Ribbon is arranged in the concave sealing groove 3 on low air pressure test chamber by assembly department 1; The side, cross section of described variant part 2 is provided with the first sealed department 2-1 of outward-dipping extension, and opposite side is the second sealed department 2-2 of arc surface, and variant part 2 is positioned at outside the concave sealing groove 3 of low air pressure test chamber.The section width of described first sealed department 2-1 reduces from bottom to up gradually, and the section of described first sealed department 2-1 is triangular in shape, forms one and flies angle, and the utility model adopts acute triangle; Because the first sealed department 2-1 is soft than being easier to distortion, therefore closing gas-tight door 4 does not just need too large pressure, and switch gate just easily, and at closing time, first sealed department 2-1 deflects automatically, reduces the extruding to the first sealed department 2-1, thus extends working life.The described center line of the first sealed department 2-1 and the centerlines α of variant part 2 are 30 ~ 60 °, the most preferred embodiment of the present embodiment is the center line of the first sealed department 2-1 and the centerlines α of variant part 2 is 45 °, this angle of cut is convenient to the first sealed department 2-1 and is out of shape, reduce firmly, to be convenient to switch gas-tight door 4.When the air pressure of low air pressure test chamber is lower, is sealed by the arc surface of the second sealed department 2-2, add contact sealing area, this ensure that in whole process of the test, the tightness of low air pressure test chamber.
Working principle of the present utility model:
When low air pressure test chamber is when doing humid test or vacuumizing beginning, the atmospheric pressure outside low air pressure test chamber drags gas-tight door 4 and is pressed on the first sealed department 2-1, the first sealed department 2-1 is out of shape, thus plays seal action to low air pressure test chamber.When low air pressure test chamber is when doing low air pressure test, along with the pressure in low air pressure test chamber constantly reduces, atmospheric pressure outside low air pressure test chamber is greater than the air pressure in low air pressure test chamber, very large power is produced by the air outside low air pressure test chamber and the pressure reduction in low air pressure test chamber, gas-tight door 4 is squeezed on the second sealed department 2-2 arc surface of Stamping Steel Ribbon, the intensity of whole arc surface is larger, this ensures that theres the hermetic seal under lowpressure state.
Claims (7)
1. the gas-tight door gasket structure of a low air pressure test chamber, it is characterized in that: described Stamping Steel Ribbon comprises assembly department (1) and variant part (2), the cross section of described assembly department (1) is trapezium structure, the side, cross section of described variant part (2) is provided with first sealed department (2-1) of outward-dipping extension, opposite side is second sealed department (2-2) of arc surface, and the section width of described first sealed department (2-1) reduces from bottom to up gradually.
2. the gas-tight door gasket structure of low air pressure test chamber according to claim 1, is characterized in that: the section of described first sealed department (2-1) is triangular in shape.
3. the gas-tight door gasket structure of low air pressure test chamber according to claim 2, is characterized in that: the section of described first sealed department (2-1) is acute triangle.
4. the gas-tight door gasket structure of low air pressure test chamber according to claim 1, is characterized in that: the center line of described first sealed department (2-1) and the centerlines α of variant part (2) are 30 ~ 60 °.
5. the gas-tight door gasket structure of low air pressure test chamber according to claim 4, is characterized in that: the center line of described first sealed department (2-1) and the centerlines α of variant part (2) are 45 °.
6. the gas-tight door gasket structure of low air pressure test chamber according to claim 1, is characterized in that: the dual-side of the assembly department (1) of described Stamping Steel Ribbon is hypotenuse.
7. the gas-tight door gasket structure of low air pressure test chamber according to claim 1, is characterized in that: described Stamping Steel Ribbon is rubber strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520093299.XU CN204459149U (en) | 2015-02-10 | 2015-02-10 | The gas-tight door gasket structure of low air pressure test chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520093299.XU CN204459149U (en) | 2015-02-10 | 2015-02-10 | The gas-tight door gasket structure of low air pressure test chamber |
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| CN204459149U true CN204459149U (en) | 2015-07-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807231A (en) * | 2017-11-21 | 2018-03-16 | 常州江鼎精密机械有限公司 | Photovoltaic working of plastics heatproof experimental rig |
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2015
- 2015-02-10 CN CN201520093299.XU patent/CN204459149U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807231A (en) * | 2017-11-21 | 2018-03-16 | 常州江鼎精密机械有限公司 | Photovoltaic working of plastics heatproof experimental rig |
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