CN211780189U - Liquid nitrogen filling tool for photomultiplier production - Google Patents
Liquid nitrogen filling tool for photomultiplier production Download PDFInfo
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- CN211780189U CN211780189U CN201922051898.6U CN201922051898U CN211780189U CN 211780189 U CN211780189 U CN 211780189U CN 201922051898 U CN201922051898 U CN 201922051898U CN 211780189 U CN211780189 U CN 211780189U
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- mouth container
- filling
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Abstract
The utility model discloses a liquid nitrogen filling tool for photomultiplier production, which comprises a small-mouth container filling device and a filling support; the small-mouth container injection device is funnel-shaped, and two symmetrical grooves are formed in the side wall of the lower end of the small-mouth container injection device; the filling support is in a trapezoidal hollow design, the diameter of the upper end of the filling support is slightly larger than that of the upper part of the funnel, so that the small-mouth container injection device can be inserted from the upper end of the filling support, and the diameter of the lower end of the filling support is slightly larger than that of the cold trap opening and is placed on the cold trap opening; the small-mouth container injection device and the filling support are welded into a whole; the small-mouth container injection device penetrates through the canning support and is inserted into the opening of the cold trap; the groove part of the small-mouth container injection device is inserted into the cold trap opening; when the liquid nitrogen is added, the sight line of an operator is vertical to the diameter connecting line of the circle where the groove is located, so that water vapor is discharged from two sides, and the sight line of the operator cannot be shielded. The utility model has the advantages of simple structure, easily operation, change convenience, efficiency improvement.
Description
Technical Field
The utility model relates to a photomultiplier makes the field, especially relates to a liquid nitrogen instrument of filling in coating equipment.
Background
In the manufacture of the photomultiplier, some parts need to be coated. In the field of industrial coating, vacuum evaporation coating is one of the most common methods for producing thin films. Among vacuum evaporation coating apparatuses, an oil diffusion pump is the most commonly used main apparatus for obtaining a high vacuum.
The cold trap cooled by liquid nitrogen in the diffusion pump can not only prevent the oil from flowing back, but also freeze the water vapor on the surface of the cold trap, thereby effectively removing the water vapor. When liquid nitrogen is added into the cold trap, in order to prevent the volatilization of the liquid nitrogen, the inlet of the cold trap for adding the liquid nitrogen is smaller, and the liquid nitrogen can be only slowly added. Therefore, a nitrogen filling tool is needed, which can quickly, efficiently and safely fill liquid nitrogen into the cold trap.
When the traditional liquid nitrogen is injected, the temperature of the liquid nitrogen is 196 ℃ below zero, and compared with the liquid nitrogen, the normal temperature is very high. Liquid nitrogen boils when added, and a large amount of water vapor is sprayed out, so that special attention needs to be paid to the fact that when the water vapor is sprayed out, the liquid nitrogen is difficult to add, and the liquid nitrogen is easy to splash out when the liquid nitrogen is added. If the inlet of the cold trap for adding liquid nitrogen is higher, the liquid nitrogen can not only splash onto the body of an operator, but also splash onto the face of the operator, and cause injury to the operator, as shown in figure 1. Meanwhile, when liquid nitrogen is added, the liquid nitrogen is greatly wasted when splashed out, and the time for adding the liquid nitrogen is prolonged.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the above prior art, the utility model provides a photomultiplier production is with liquid nitrogen instrument of filling, its simple structure, it is easy and simple to handle, raise the efficiency, safe and reliable.
The utility model relates to a liquid nitrogen filling tool for photomultiplier production, which comprises a small-mouth container injection device and a filling support; the small-mouth container injection device is funnel-shaped, and two symmetrical grooves are formed in the side wall of the lower end of the small-mouth container injection device; the filling support is in a trapezoidal hollow design, the diameter of the upper end of the filling support is slightly larger than that of the upper part of the funnel, so that the small-mouth container injection device can be inserted from the upper end of the filling support, and the diameter of the lower end of the filling support is slightly larger than that of the cold trap opening and is placed on the cold trap opening; the small-mouth container injection device and the filling support are welded into a whole; the small-mouth container injection device penetrates through the canning support and is inserted into the opening of the cold trap; part of the groove of the small-mouth container injection device is inserted into the cold trap port, and part of the groove is outside the cold trap port; when the liquid nitrogen is added, the sight line of an operator is vertical to the diameter connecting line of the circle where the two symmetrical grooves are located on the side wall of the lower end, so that water vapor is discharged from two sides, and the sight line of the operator cannot be shielded.
Preferably, the small-mouth container injection device and the filling support are changed in size according to different cold traps.
Preferably, the utility model discloses the device is stainless steel.
The utility model has the advantages that: simple structure, easily operation, change convenience through adopting liquid nitrogen filling instrument among this novel filming equipment, efficiency when making the liquid nitrogen fill has improved 1/3, has saved the time of liquid nitrogen filling. The tool effectively inhibits the problem that liquid nitrogen splashes out during filling, saves the liquid nitrogen and reduces the cost. Particularly for equipment with high cold traps, the device effectively protects the safety of operators and prevents liquid nitrogen from splashing onto the operators when liquid nitrogen splashes out.
Drawings
FIG. 1 is a background art diagram.
Fig. 2 is a structural diagram of the present invention.
Fig. 3 is an exploded view of the present invention.
The reference numbers: the device comprises a small-mouth container injection device 1, a filling support 2, a cold trap 3 and symmetrical grooves 4.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 2-3, a liquid nitrogen perfusion tool for photomultiplier tube production includes: a small-mouth container injection device 1 and a filling support 2. The small-mouth container injection device 1 is funnel-shaped, and two symmetrical grooves 4 are formed in the side wall of the lower end of the small-mouth container injection device; the filling support 2 is in a trapezoidal hollow design, the diameter of the upper end of the filling support is slightly larger than that of the upper part of the funnel, so that the small-mouth container injection device 1 can be inserted from the upper end of the filling support 2, and the diameter of the lower end of the filling support 2 is slightly larger than that of the mouth of the cold trap 3 and placed on the mouth of the cold trap 3; the small-mouth container injection device 2 and the filling support 3 are welded into a whole; the small-mouth container injection device 1 penetrates through the canning support 2 and is inserted into the mouth of the cold trap 3; the groove part of the small-mouth container injection device 1 is inserted into the mouth of the cold trap 3; when the liquid nitrogen is added, the sight line of an operator is vertical to the diameter connecting line of the circle where the groove is located, so that water vapor is discharged from two sides, and the sight line of the operator cannot be shielded.
It is finally noted that the embodiments disclosed are for the purpose of aiding in the further understanding of the invention, but will be understood by those skilled in the art; various substitutions and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the embodiments disclosed, and the scope of the present invention is defined by the appended claims.
Claims (3)
1. A liquid nitrogen filling tool for photomultiplier production comprises a small-mouth container injection device and a filling support; the device is characterized in that the small-mouth container injection device is funnel-shaped, and two symmetrical grooves are formed in the side wall of the lower end of the small-mouth container injection device; the filling support is in a trapezoidal hollow design, the diameter of the upper end of the filling support is slightly larger than that of the upper part of the funnel, so that the small-mouth container injection device can be inserted from the upper end of the filling support, and the diameter of the lower end of the filling support is slightly larger than that of the cold trap opening and is placed on the cold trap opening; the small-mouth container injection device and the filling support are welded into a whole; the small-mouth container injection device penetrates through the canning support and is inserted into the opening of the cold trap; part of the groove of the small-mouth container injection device is inserted into the cold trap port, and part of the groove is outside the cold trap port; when the liquid nitrogen is added, the sight line of an operator is vertical to the diameter connecting line of the circle where the two symmetrical grooves are located on the side wall of the lower end, so that water vapor is discharged from two sides, and the sight line of the operator cannot be shielded.
2. The liquid nitrogen filling tool for photomultiplier tube production according to claim 1, wherein the small-mouth container filling device and the filling holder are changed in size according to the difference of the cold traps.
3. The liquid nitrogen perfusion tool for photomultiplier tube production according to claim 1, wherein the tool is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922051898.6U CN211780189U (en) | 2019-11-25 | 2019-11-25 | Liquid nitrogen filling tool for photomultiplier production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922051898.6U CN211780189U (en) | 2019-11-25 | 2019-11-25 | Liquid nitrogen filling tool for photomultiplier production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211780189U true CN211780189U (en) | 2020-10-27 |
Family
ID=72960769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922051898.6U Active CN211780189U (en) | 2019-11-25 | 2019-11-25 | Liquid nitrogen filling tool for photomultiplier production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211780189U (en) |
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2019
- 2019-11-25 CN CN201922051898.6U patent/CN211780189U/en active Active
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