CN213290320U - Pneumatic sealing negative pressure glove box - Google Patents
Pneumatic sealing negative pressure glove box Download PDFInfo
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- CN213290320U CN213290320U CN202021041358.6U CN202021041358U CN213290320U CN 213290320 U CN213290320 U CN 213290320U CN 202021041358 U CN202021041358 U CN 202021041358U CN 213290320 U CN213290320 U CN 213290320U
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Abstract
The utility model discloses a pneumatic seal negative pressure glove box, the device includes: the sealed box body and the air purification system are connected with each other; the air purification system includes: an air inlet butterfly valve and an air inlet high-efficiency filter in the air inlet air path; the exhaust air path is sequentially connected with an exhaust outlet butterfly valve, an exhaust high-efficiency filter, an exhaust iodine adsorber, a vacuum generator and an exhaust pipe in series; the air inlet air path and the air exhaust air path are communicated with the sealed box body through air pipes. This novel simple structure, reasonable in design has higher security and wider environmental suitability.
Description
Technical Field
The utility model relates to a nuclear safety technical field, concretely relates to pneumatic seal negative pressure glove box.
Background
With the development of nuclear power and nuclear technology applications, nuclear reactor operations, nuclear fuel manufacturing, radiochemical operations, laboratories and other nuclear operations produce harmful radioactive particles and radioactive gases. In order to reduce the emission of the particles and radioactive gases and protect workers and the environment from harm, currently, various countries in the world use an iodine adsorber containing impregnated activated carbon to specifically adsorb the radioactive iodine in the radioactive gases, which can be absorbed and enriched by the thyroid gland of the human body, and the iodine removal efficiency of the iodine adsorber has an extremely important influence on the function of the whole nuclear air purification system.
In order to ensure the reliable operation of the iodine adsorber, the iodine removal efficiency of the iodine adsorber needs to be tested for verification during production and use. At present, the radioactive methyl iodine method which utilizes dimethyl sulfate and sodium iodide (NaI oral liquid, medical liquid I-131 radioactive source) to generate methyl iodine (CH3131I) gas through an interfacial liquid phase ion exchange reaction is mainly adopted in China to carry out an iodine removal efficiency test of an iodine absorber.
Before the efficiency test of the iodine adsorber, sodium iodide (I-131 radioactive source) with certain activity needs to be prepared according to the test requirements, and as the reagent has radioactivity, the whole preparation process needs to be operated in a sealed negative pressure glove box in order to ensure safety.
The existing sealed negative pressure glove box is manufactured into a negative pressure environment by exhausting air by an electric fan, so that a proper power supply is needed when the glove box is used, and the fan is sensitive to the ambient temperature and humidity, so that the use place of the original product is limited. Therefore, it is imperative to develop a sealed negative pressure glove box that creates a negative pressure environment by using a gas source.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defect that prior art exists, provide a pneumatic seal negative pressure glove box makes it not receive the use scene restriction.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: a pneumatic sealing negative pressure glove box comprises a sealing box body and an air purification system which are connected with each other;
the air purification system includes: an air inlet butterfly valve and an air inlet high-efficiency filter in the air inlet air path; the exhaust air path is sequentially connected with an exhaust outlet butterfly valve, an exhaust high-efficiency filter, an exhaust iodine adsorber, a vacuum generator and an exhaust pipe in series;
the air inlet air path and the air exhaust air path are communicated with the sealed box body through air pipes; the sealed box body includes: the main part case and pass through the transition cabin of sealing door with the main part case is kept apart.
Furthermore, sealing strips are installed on one side, close to the main box, of the sealing door, a handle type pressing device is installed on the other side of the sealing door, the sealing strips are pressed through rotating a handle, and therefore air tightness in the main box under the opening state of the transition cabin is guaranteed.
Further, a sealing strip is installed on the inner side of the cabin door of the transition cabin, a handle type pressing device is installed on the outer side of the cabin door, and the sealing strip is pressed through rotating the handle, so that the air tightness of the sealed cabin is guaranteed.
Further, the sealed box still includes: at least two hand holes, a glove attachment and a lead-containing glove, and a viewing window.
Furthermore, the air purification system also comprises two pressure gauges, and the pressure difference inside and outside the box body can be directly read through the reading of the pressure gauges.
Furthermore, the sealing box body is made of stainless steel plates with the thickness not less than 1mm through welding.
Further, the air purification system also comprises a pressure reducing valve, and the pressure reducing valve is arranged at the air inlet of the vacuum generator.
Compared with the prior art, the utility model discloses the beneficial technological effect who has is: simple structure, low running cost, good safety and wide environmental applicability.
Drawings
Fig. 1 is a schematic structural view of the pneumatic sealing negative pressure glove box of the present invention.
In the figure: 1-a main box body; 2-a transition cabin; 3-hand hole; 4-observation window; 5-air inlet butterfly valve; 6-air intake high efficiency filter; 7-air outlet butterfly valve; 8-an efficient exhaust filter; 9-air exhaust iodine adsorber; 10-a vacuum generator 10; 11-pressure reducing valve.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the following will combine the accompanying drawings to describe the technical solution of the embodiments of the present invention in further detail. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a pneumatic sealing negative pressure glove box of the present invention. A pneumatic sealing negative pressure glove box comprises a sealing box body and an air purification system.
Preferably, the material of the sealed box body is welded by using a stainless steel plate with the thickness of not less than 1mmThe grade of the stainless steel plate is 0Cr18Ni 9. In a specific embodiment, the geometric volume of the device is 0.38m3The weight is about 190 KG.
The sealed box body mainly comprises a main box body 1 and a transition cabin 2 isolated from the main box body through a sealing door. The main box body 1 is provided with at least two hand holes 3, glove receiving discs and gloves connected to the glove receiving discs, and the gloves are generally distributed on the front or the front and the back of the main box body 1. In addition, the front or front and back of the main box 1 may be provided with an observation window 4, so that a user can clearly observe the operation process in the box. Specifically, the gloves are lead-containing gloves, and workers can operate the radioactive workpieces and tools in the main box body 1 through the lead-containing rubber gloves, so that the sealing effect of the main box body 1 is kept, and the radioactive workpieces are prevented from being polluted outside.
The transition cabin 2 is used as a transition space between the main box body 1 and the outside of the box body and is used for transferring radioactive workpieces to be cleaned. A sealing strip is arranged on one side, close to the main box, of the sealing door, a handle type pressing device is arranged on the other side of the sealing door, the sealing strip is pressed through a rotating handle, and therefore the air tightness in the main box under the opening state of the transition cabin 2 is guaranteed. The sealing strip is also installed on the inner side of the cabin door of the transition cabin 2, the handle type pressing device is installed on the outer side of the cabin door, and the sealing strip is pressed through rotating the handle, so that the air tightness of the sealed cabin is guaranteed.
The air inlet air path and the air exhaust air path in the air purification system are communicated with the sealing box body by the air pipes. In one embodiment, the air purification system is mounted on top of the sealed box, but is not limited in other embodiments.
The air purification system includes: an air inlet butterfly valve 5 and an air inlet high-efficiency filter 6 in the air inlet air path; the air outlet butterfly valve 7, the air exhaust high-efficiency filter 8, the air exhaust iodine adsorber 9, the vacuum generator 10 and the air exhaust pipe are sequentially connected in series in the air exhaust air path, and the equipment is connected through a quick-connection flange.
When the air inlet gas circuit is used, the air inlet high-efficiency filter 6 and the air inlet butterfly valve 5 can effectively ensure that the gas entering the sealing box body does not have unacceptable particulate matters and aerosol, and meanwhile, the air input of the sealing box body can be adjusted and the negative pressure of the sealing box body can be controlled to be kept between-150 and 250 Pa; when the air inlet butterfly valve 5 is not used, the pollution in the sealed box body can be effectively controlled and cannot be leaked to the environment through the air inlet. The air exhaust gas circuit is sequentially connected with an air exhaust port butterfly valve 7, an air exhaust efficient filter 8, an air exhaust iodine adsorber 9, a vacuum generator 10 and an air exhaust pipe in series, the air exhaust volume of the box body and the negative pressure in the box body can be adjusted through the air exhaust port butterfly valve 7, the air exhaust efficient filter 8 can effectively remove aerosol and solid particles in the box body (the filtering efficiency is more than or equal to 99.99%), and the air exhaust iodine adsorber 9 can effectively remove radioactive gas in the box body (the filtering efficiency is more than or equal to 99%).
Meanwhile, the air purification system further comprises a pressure reducing valve 11, and the pressure reducing valve 11 is arranged at an air inlet of the vacuum generator 10.
Preferably, the air purification system further comprises two pressure gauges, and the pressure difference between the inside and the outside of the box body can be directly read through the reading of the pressure gauges.
Through a plurality of tests of the device, the box body is subjected to a pressure bearing test under the negative pressure of not less than-1520 Pa, the test time is not less than 5 minutes, and no crack or permanent deformation occurs. The air tightness of the box body is satisfied, when the pressure difference between the inside and the outside of the glove box reaches-1000 +/-20 Pa, the leakage amount per hour does not exceed 10 percent of the volume, namely 0.038m3/h。
Adjusting the inlet and outlet air path butterfly valve to make the sum of the pressure difference more than 800Pa, simultaneously making the negative pressure in the cabinet not less than-250 Pa, and the air exchange rate not less than 30 times/h, at this time, the air quantity of the system is more than 11.3m3/h。
The utility model discloses pneumatic seal negative pressure glove box's operation process as follows:
connecting an air source; then the negative pressure of the box body reaches about-200 Pa by adjusting a butterfly valve of an air inlet gas circuit and an air outlet gas circuit; the perfectly packaged non-sealed radioactive substances are transferred into the main body box through the transition cabin 2 for operation, the vacuum generator 10 is kept to continuously operate in the operation process, negative pressure is formed in the box body, and the radioactive substances in the box body are prevented from being discharged and overflowing without being filtered; after the operation is finished, the non-sealed radioactive substances which are finished with the operation are packed completely and then are transported out through the transition cabin 2; and finally, disconnecting the air source.
The device is characterized in that in the operation process, the negative pressure in the box body is kept between-150 Pa and 250Pa, the air exchange rate is not less than 30 times/h, the filtering efficiency of the device on radioactive gas and aerosol is not less than 99.99 percent, the structure is simple, the practical scene is not limited, and the device has higher safety and wider environment applicability.
It should be understood by those skilled in the art that the structure of the present invention is not limited to the embodiments described in the detailed description, and the above detailed description is only for the purpose of explaining the present invention and is not intended to limit the present invention. The technical solution according to the present invention is used by those skilled in the art to derive other embodiments, which also belong to the technical innovation scope of the present invention, and the protection scope of the present invention is defined by the claims and their equivalents.
Claims (7)
1. A pneumatically sealed negative pressure glove box, comprising: the sealed box body and the air purification system are connected with each other;
the air purification system includes: an air inlet butterfly valve and an air inlet high-efficiency filter in the air inlet air path; the exhaust air path is sequentially connected with an exhaust outlet butterfly valve, an exhaust high-efficiency filter, an exhaust iodine adsorber, a vacuum generator and an exhaust pipe in series;
the air inlet air path and the air exhaust air path are communicated with the sealed box body through air pipes;
the sealed box body includes: the main part case and pass through the transition cabin of sealing door with the main part case is kept apart.
2. The pneumatically sealed negative pressure glove box according to claim 1, wherein the sealing door is provided with a sealing strip at one side close to the main box and a handle type pressing device at the other side, and the sealing strip is pressed by rotating a handle to ensure the airtightness in the main box in the opening state of the transition chamber.
3. The pneumatically sealed negative pressure glove box as claimed in claim 1, wherein the door of the transition chamber is provided with a sealing strip on the inner side and a handle type pressing device on the outer side, and the sealing strip is pressed by rotating the handle to ensure the airtightness of the sealed chamber.
4. The pneumatically sealed, negative pressure glove box of claim 1, further comprising: at least two hand holes, a glove attachment and a lead-containing glove, and a viewing window.
5. The pneumatically sealed negative pressure glove box as claimed in claim 1, wherein the air purification system further comprises two pressure gauges, and the pressure difference between the inside and the outside of the box body can be directly read by the reading of the pressure gauges.
6. The pneumatically sealed negative pressure glove box as claimed in claim 1, wherein the material of the sealed box body is welded by using stainless steel plates with a thickness of not less than 1 mm.
7. The pneumatically sealed negative pressure glove box of claim 1, further comprising a pressure relief valve disposed at the vacuum generator inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021041358.6U CN213290320U (en) | 2020-06-09 | 2020-06-09 | Pneumatic sealing negative pressure glove box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021041358.6U CN213290320U (en) | 2020-06-09 | 2020-06-09 | Pneumatic sealing negative pressure glove box |
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| Publication Number | Publication Date |
|---|---|
| CN213290320U true CN213290320U (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021041358.6U Active CN213290320U (en) | 2020-06-09 | 2020-06-09 | Pneumatic sealing negative pressure glove box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113350955A (en) * | 2021-06-01 | 2021-09-07 | 昱辰实验室系统科技(苏州)有限公司 | Aerosol processor |
| CN113380435A (en) * | 2021-06-23 | 2021-09-10 | 中国核动力研究设计院 | Containing box for He-3 gas loop |
-
2020
- 2020-06-09 CN CN202021041358.6U patent/CN213290320U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113350955A (en) * | 2021-06-01 | 2021-09-07 | 昱辰实验室系统科技(苏州)有限公司 | Aerosol processor |
| CN113380435A (en) * | 2021-06-23 | 2021-09-10 | 中国核动力研究设计院 | Containing box for He-3 gas loop |
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