CN211703397U - Dewar bottle cap with liquid nitrogen height indicating device - Google Patents
Dewar bottle cap with liquid nitrogen height indicating device Download PDFInfo
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- CN211703397U CN211703397U CN201921987631.1U CN201921987631U CN211703397U CN 211703397 U CN211703397 U CN 211703397U CN 201921987631 U CN201921987631 U CN 201921987631U CN 211703397 U CN211703397 U CN 211703397U
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Abstract
A Dewar bottle cap with a liquid nitrogen height indicating device comprises a bottle cap, a warning indicator, a safety indicator and a floater; the bottle cap is made of heat-insulating materials, a transparent display window is arranged on the outer side of the bottle cap, and a counter bore is formed in the middle of the lower portion of the bottle cap; the warning indicator is in a red and inverted barrel shape and is fixedly arranged in a counter bore at the lower part of the bottle cap; the safety indicator is green and tubular, and the upper part of the safety indicator is movably arranged in an annular space between the warning indicator and the bottle cap; the float is fixedly arranged at the lower end part of the safety indicator; when the height of liquid nitrogen in the Dewar flask is higher, the safety indicator shields the warning indicator, and the display window displays green; when the liquid nitrogen height is reduced to a certain height, part of the warning indicator is exposed, and the display window simultaneously displays red and green colors; when the liquid nitrogen level continues to drop to the height to be supplemented, the warning indicator is completely exposed, and at the moment, the display window displays red color which indicates that the liquid nitrogen needs to be supplemented as soon as possible so as to ensure the safety of the stored stem cells.
Description
Technical Field
The utility model relates to a stem cell storage device technical field, concretely relates to take liquid nitrogen height indicating device's dewar bottle lid.
Background
The conventional cryopreservation tank for small-batch storage of stem cells generally adopts a Dewar flask, and liquid nitrogen is required to be supplemented and added at irregular time and is used for maintaining a low-temperature environment in the Dewar flask; however, the existing Dewar flask is not provided with a device for displaying the height of liquid nitrogen, so before the liquid nitrogen is supplemented, the residual amount of the liquid nitrogen in the Dewar flask needs to be checked and confirmed; however, when the liquid nitrogen height of the Dewar flask is checked, the Dewar flask is filled with white aerosol, so that the Dewar flask cannot be directly checked visually, and the liquid nitrogen height of the Dewar flask needs to be checked by other methods; the existing inspection method is as follows: an operator slowly extends into the Dewar flask by using a metal rod, when hearing the 'nourishing' sound, the length of the metal rod extending into the Dewar flask is recorded, and then the height of the residual liquid nitrogen in the Dewar flask is estimated; however, this method has three problems: firstly, the operation is complex, and the operation must be performed by personnel with abundant operation experience, otherwise, the condition of inaccurate inspection result occurs; secondly, the efficiency is low, the display instantaneity is poor, when a plurality of Dewar flasks are inspected by using the metal rod, the temperature of the metal rod is too low, the 'nourishing' generated by the contact of the metal rod and liquid nitrogen is reduced, the inspection cannot be continuously performed, a period of time is required, and the metal rod can continue to be inspected after being warmed; thirdly, the problem of missed detection exists, when the number of Dewar flasks storing the stem cells is large, the problem of missed detection exists, and the stored stem cells are invalid due to the fact that liquid nitrogen is not supplemented to the Dewar flasks which are missed to be detected in time; for the above reasons, there is a need to develop a device for visually and timely displaying the level of liquid nitrogen in a dewar so as to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the background art, the utility model discloses a Dewar bottle cap with a liquid nitrogen height indicating device, which comprises a bottle cap, a warning indicator, a safety indicator and a floater; the bottle cap is made of heat-insulating materials, a transparent display window is arranged on the outer side of the bottle cap, and a counter bore is formed in the middle of the lower portion of the bottle cap; the warning indicator is in a red and inverted barrel shape and is fixedly arranged in a counter bore at the lower part of the bottle cap; the safety indicator is green and tubular, and the upper part of the safety indicator is movably arranged in an annular space between the warning indicator and the bottle cap; the float is fixedly arranged at the lower end part of the safety indicator; when the height of liquid nitrogen in the Dewar flask is high, the safety indicator floats under the action of the floater, the warning indicator is shielded by the safety indicator, and the display window displays green to indicate that the liquid nitrogen storage is safe; when the liquid nitrogen height is reduced to a certain height, the safety indicator descends along with the liquid nitrogen, part of the warning indicator is exposed, and at the moment, the display window simultaneously displays red and green colors to indicate that the liquid nitrogen storage amount is insufficient; when the liquid nitrogen height continuously drops to the height to be supplemented, the safety indicator continuously drops along with the liquid nitrogen, the warning indicator is completely exposed, at the moment, the display window displays red, and the fact that the liquid nitrogen needs to be supplemented as soon as possible is indicated, so that the safety of the stored stem cells is guaranteed.
In order to realize the utility model aims at, the utility model adopts the following technical scheme: a Dewar bottle cap with a liquid nitrogen height indicating device comprises a bottle cap, a warning indicator, a safety indicator and a floater; the bottle cap is a bottle stopper with a flange, and a counter bore is arranged in the middle of the lower part of the bottle cap; the warning indicator is in an inverted barrel shape and is fixedly arranged in a counter bore at the lower part of the bottle cap, and an annular space is formed by the outer circular surface of the warning indicator and the circumferential surface of the counter bore at the lower part of the bottle cap; the safety indicator is in a circular tube shape, and the upper part of the safety indicator is movably arranged in an annular space between the warning indicator and the bottle cap; the float is fixedly arranged at the lower end part of the safety indicator.
Furthermore, the anti-drop rings are arranged on the excircle of the lower end of the warning indicator and the excircle of the upper end of the safety indicator, so that the safety indicator is prevented from dropping when the Dewar flask cover is taken out of the Dewar flask.
Further, the bottle cap is made of transparent materials and is used for seeing the color of the warning indicator or the safety indicator through the bottle cap so as to confirm the height of liquid nitrogen in the Dewar flask.
Furthermore, the bottle cap is made of a non-transparent heat-preservation material, so that a good heat-preservation effect is achieved, and liquid nitrogen consumption is reduced; and a transparent display window is arranged on the outer side of the bottle cap and is used for seeing the color of the warning indicator or the safety indicator through the transparent display window so as to confirm the height of the liquid nitrogen in the Dewar flask.
Furthermore, the warning indicator is red, and the red is warning color, so that the deficiency of the liquid nitrogen in the Dewar bottle can be warned, and the liquid nitrogen needs to be supplemented as soon as possible.
Furthermore, the safety indicator is green, and the green is a safety color, and is used for displaying that the liquid nitrogen in the Dewar flask is higher in height and is in a safety state.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses a Dewar bottle cap with a liquid nitrogen height indicating device, which comprises a bottle cap, a warning indicator, a safety indicator and a floater; the bottle cap is made of heat-insulating materials, a transparent display window is arranged on the outer side of the bottle cap, and a counter bore is formed in the middle of the lower portion of the bottle cap; the warning indicator is in a red and inverted barrel shape and is fixedly arranged in a counter bore at the lower part of the bottle cap; the safety indicator is green and tubular, and the upper part of the safety indicator is movably arranged in an annular space between the warning indicator and the bottle cap; the float is fixedly arranged at the lower end part of the safety indicator; when the height of liquid nitrogen in the Dewar flask is high, the safety indicator floats under the action of the floater, the warning indicator is shielded by the safety indicator, and the display window displays green to indicate that the liquid nitrogen storage is safe; when the liquid nitrogen height is reduced to a certain height, the safety indicator descends along with the liquid nitrogen, part of the warning indicator is exposed, and at the moment, the display window simultaneously displays red and green colors to indicate that the liquid nitrogen storage amount is insufficient; when the liquid nitrogen height continuously drops to the height to be supplemented, the safety indicator continuously drops along with the liquid nitrogen, the warning indicator is completely exposed, at the moment, the display window displays red, and the fact that the liquid nitrogen needs to be supplemented as soon as possible is indicated, so that the safety of the stored stem cells is guaranteed.
Drawings
FIG. 1 is a schematic view of the external appearance of a Dewar flask with a liquid nitrogen level indicating device;
FIG. 2 is a cross-sectional view of a Dewar flask with a liquid nitrogen level indicating device;
FIG. 3 is a schematic view showing the state of the bottle cap when the liquid nitrogen is high;
FIG. 4 is a schematic view showing the state of the bottle cap when the liquid nitrogen is reduced to the height required to be supplemented;
fig. 5 is an enlarged view of part a.
In the figure: 1. a bottle cap; 2. a warning indicator; 3. a safety indicator; 4. a float.
Detailed Description
The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.
A Dewar flask cap with a liquid nitrogen height indicating device comprises a flask cap 1, a warning indicator 2, a safety indicator 3 and a floater 4; the bottle cap 1 is a bottle plug with a flange, is made of heat-insulating materials, is provided with a transparent display window at the outer side and is provided with a counter bore at the lower part; the warning indicator 2 is in a red and inverted barrel shape and is fixedly arranged in a counter bore at the lower part of the bottle cap 1; the safety indicator 3 is green and tubular, and the upper part of the safety indicator is movably arranged in an annular space between the warning indicator 2 and the bottle cap 1; the float 4 is fixedly arranged at the lower end part of the safety indicator 3; the outer circle of the lower end of the warning indicator 2 and the inner circle of the upper end of the safety indicator 3 are provided with anti-drop rings.
When the Dewar flask cover with the liquid nitrogen height indicating device is used, the Dewar flask cover is directly covered at the opening of the Dewar flask, and the safety indicator 3 and the floater 4 extend into the Dewar flask; when the height of liquid nitrogen in the Dewar flask is high, the safety indicator 3 floats under the action of the floater 4, the warning indicator 2 is shielded by the safety indicator 3, and the display window displays green to indicate that the liquid nitrogen storage is safe; when the liquid nitrogen height is reduced to a certain height, the safety indicator 3 is reduced along with the liquid nitrogen, part of the warning indicator 4 is exposed, and at the moment, the display window simultaneously displays red and green colors to indicate that the liquid nitrogen storage is insufficient; when the liquid nitrogen level continues to drop to the level to be supplemented, the safety indicator 3 continues to drop along with the liquid nitrogen, the warning indicator 2 is completely exposed, at the moment, the display window displays red, which indicates that the liquid nitrogen needs to be supplemented as soon as possible, so that the safety of the stored stem cells is ensured.
The part of the utility model not detailed is prior art.
Claims (6)
1. The utility model provides a take liquid nitrogen height indicating device's dewar bottle lid which characterized by: comprises a bottle cap (1), a warning indicator (2), a safety indicator (3) and a floater (4); the bottle cap (1) is a bottle plug with a flange, and a counter bore is arranged in the middle of the lower part of the bottle cap; the warning indicator (2) is in an inverted barrel shape and is fixedly arranged in a counter bore at the lower part of the bottle cap (1), and an annular space is formed by the outer circular surface of the warning indicator (2) and the circumferential surface of the counter bore at the lower part of the bottle cap (1); the safety indicator (3) is in a circular tube shape, and the upper part of the safety indicator is movably arranged in an annular space between the warning indicator (2) and the bottle cap (1); the float (4) is fixedly arranged at the lower end part of the safety indicator (3).
2. The dewar bottle cap with liquid nitrogen level indicating device of claim 1, wherein: anti-drop rings are arranged on the excircle at the lower end of the warning indicator (2) and the excircle at the upper end of the safety indicator (3).
3. The dewar bottle cap with liquid nitrogen level indicating device of claim 1, wherein: the bottle cap (1) is made of transparent materials.
4. The dewar bottle cap with liquid nitrogen level indicating device of claim 1, wherein: the bottle cap (1) is made of a non-transparent heat-preservation material; the outer side of the bottle cap (1) is provided with a transparent display window.
5. The dewar bottle cap with liquid nitrogen level indicating device of claim 1, wherein: the warning indicator (2) is red.
6. The dewar bottle cap with liquid nitrogen level indicating device of claim 1, wherein: the safety indicator (3) is green.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921987631.1U CN211703397U (en) | 2019-11-18 | 2019-11-18 | Dewar bottle cap with liquid nitrogen height indicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921987631.1U CN211703397U (en) | 2019-11-18 | 2019-11-18 | Dewar bottle cap with liquid nitrogen height indicating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211703397U true CN211703397U (en) | 2020-10-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921987631.1U Active CN211703397U (en) | 2019-11-18 | 2019-11-18 | Dewar bottle cap with liquid nitrogen height indicating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211703397U (en) |
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2019
- 2019-11-18 CN CN201921987631.1U patent/CN211703397U/en active Active
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