CN204470259U - A kind of vent cabinet overhead guard - Google Patents
A kind of vent cabinet overhead guard Download PDFInfo
- Publication number
- CN204470259U CN204470259U CN201520149716.8U CN201520149716U CN204470259U CN 204470259 U CN204470259 U CN 204470259U CN 201520149716 U CN201520149716 U CN 201520149716U CN 204470259 U CN204470259 U CN 204470259U
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- China
- Prior art keywords
- top board
- operating cavity
- vent cabinet
- relief hole
- vent
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Abstract
The utility model provides a kind of vent cabinet overhead guard, belong to the technical scheme in vent cabinet field, the air vent that it comprises top board, be arranged on the side plate of the top board left and right sides, be arranged on backboard on rear side of top board, be arranged on the operation window on front side of top board and be located on top board, this top board, side plate, backboard and operation window surround an operating cavity, this air vent is connected with operating cavity, especially, described top board is also provided with the relief hole of band check function, this relief hole is connected with operating cavity; Described side plate is provided with the wind complement port of band check function, and this wind complement port is connected with operating cavity.By such scheme, by relief hole, too much gas can be discharged, and in time air be supplemented to operating cavity by wind complement port, therefore maintain the stable gas pressure in operating cavity.
Description
Technical field
The utility model relates to a kind of overhead guard, particularly a kind of vent cabinet overhead guard being applied to vent cabinet.
Background technology
Present stage, carrying out in scientific research and testing process, vent cabinet is absolutely necessary equipment.Such as, but the safety coefficient of existing vent cabinet is but not high, when right scientific research personnel tests in vent cabinet, pressure is excessively strong, and air-flow is excessive, causes air in cabinet outwards not aspirate in time, makes can not keep normal negative pressure state in cabinet.In vent cabinet, gas pressure is excessively strong, and air-flow is excessive, causes vent cabinet air-flow not discharge in time, causes the safety that can not ensure operating personnel and environment.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of vent cabinet overhead guard, to solve the not high problem of existing vent cabinet safety coefficient.
For solving the problem, the technical scheme that the utility model adopts is as follows:
A kind of vent cabinet overhead guard, the air vent comprising top board, be arranged on the side plate of the top board left and right sides, be arranged on backboard on rear side of top board, be arranged on the operation window on front side of top board and be located on top board, this top board, side plate, backboard and operation window surround an operating cavity, this air vent is connected with operating cavity, described top board is also provided with the relief hole of band check function, this relief hole is connected with operating cavity; Described side plate is provided with the wind complement port of band check function, and this wind complement port is connected with operating cavity.
Preferably, the end face of described top board has convexed to form gas skirt, and described air vent is located on gas skirt.
Preferably, described top board is also provided with explosion-proof indicating lamp.
Compared to existing technology, the beneficial effects of the utility model are:
The stable gas pressure in vent cabinet can be kept by relief hole and wind complement port; Because the utility model is applied on vent cabinet, so in use, experiment will be carried out in operating cavity, if the air pressure now in operating cavity is comparatively large, too much gas will be discharged by relief hole, when the air pressure in chamber to be operated recovers to stablize, because relief hole is with check function, therefore relief hole will be closed automatically, the gas in operating cavity will be avoided to continue to discharge, to keep the stable gas pressure in operating cavity; In like manner, when the air pressure in operating cavity is too low, wind complement port can by the replenish air in the external world in operating cavity, when air pressure in chamber to be operated recovers to stablize, because wind complement port is with check function, therefore wind complement port will be closed automatically, avoid extraneous gas to continue to enter in operating cavity, maintain the stable gas pressure in operating cavity equally.
Accompanying drawing explanation
Fig. 1 is the perspective view after the utility model is arranged on vent cabinet;
Fig. 2 is the schematic top plan view after the utility model is arranged on vent cabinet;
Fig. 3 is the side cross sectional views after the utility model is arranged on vent cabinet;
Fig. 4 is the front elevational schematic after the utility model is arranged on vent cabinet.
Reference numeral is as follows:
11, top board; 12, side plate; 13, backboard; 14, operation window; 2, gas skirt; 3, air vent; 4, explosion-proof indicating lamp; 5, relief hole; 6, wind complement port.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figures 1 to 4, the gas skirt 2 that vent cabinet overhead guard described in the utility model comprises top board 11, be arranged on the side plate 12 of top board 11 left and right sides, be arranged on backboard 13 on rear side of top board 11, be arranged on operation window 14 on front side of top board 11, convex to form from top board 11 end face, the explosion-proof indicating lamp 4 be located at the air vent 3 gas skirt 2 and be located on top board 11, this top board 11, side plate 12, backboard 13 and operation window 14 surround an operating cavity, and this air vent 3 is connected with operating cavity; Wherein, described top board 11 is also provided with the relief hole 5 of band check function, this relief hole 5 is connected with operating cavity; Described side plate 12 is provided with the wind complement port 6 of band check function, and this wind complement port 6 is connected with operating cavity.
Because the utility model is applied on vent cabinet, so in use, experiment will be carried out in operating cavity, if the air pressure now in operating cavity is comparatively large, too much gas will be discharged by relief hole 5, when the air pressure in chamber to be operated recovers to stablize, because relief hole 5 is with check function, therefore relief hole 5 will be closed automatically, the gas in operating cavity will be avoided to continue to discharge, to keep the stable gas pressure in operating cavity; In like manner, when the air pressure in operating cavity is too low, wind complement port 6 can by the replenish air in the external world in operating cavity, when air pressure in chamber to be operated recovers to stablize, because wind complement port 6 is with check function, therefore wind complement port 6 will be closed automatically, avoid extraneous gas to continue to enter in operating cavity, maintain the stable gas pressure in operating cavity equally.
Above-mentioned embodiment is only preferred embodiment of the present utility model; can not limit the scope of the utility model protection with this, change and the replacement of any unsubstantiality that those skilled in the art does on basis of the present utility model all belong to the utility model scope required for protection.
Claims (3)
1. a vent cabinet overhead guard, the air vent comprising top board, be arranged on the side plate of the top board left and right sides, be arranged on backboard on rear side of top board, be arranged on the operation window on front side of top board and be located on top board, this top board, side plate, backboard and operation window surround an operating cavity, this air vent is connected with operating cavity, it is characterized in that: the relief hole described top board being also provided with band check function, this relief hole is connected with operating cavity; Described side plate is provided with the wind complement port of band check function, and this wind complement port is connected with operating cavity.
2. vent cabinet overhead guard according to claim 1, it is characterized in that: the end face of described top board has convexed to form gas skirt, described air vent is located on gas skirt.
3. vent cabinet overhead guard according to claim 1, is characterized in that: described top board is also provided with explosion-proof indicating lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520149716.8U CN204470259U (en) | 2015-03-16 | 2015-03-16 | A kind of vent cabinet overhead guard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520149716.8U CN204470259U (en) | 2015-03-16 | 2015-03-16 | A kind of vent cabinet overhead guard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204470259U true CN204470259U (en) | 2015-07-15 |
Family
ID=53626001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520149716.8U Active CN204470259U (en) | 2015-03-16 | 2015-03-16 | A kind of vent cabinet overhead guard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204470259U (en) |
-
2015
- 2015-03-16 CN CN201520149716.8U patent/CN204470259U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |