CN210833776U - Measuring device for marking the level of a liquid in a liquid container - Google Patents
Measuring device for marking the level of a liquid in a liquid container Download PDFInfo
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- CN210833776U CN210833776U CN201922310884.1U CN201922310884U CN210833776U CN 210833776 U CN210833776 U CN 210833776U CN 201922310884 U CN201922310884 U CN 201922310884U CN 210833776 U CN210833776 U CN 210833776U
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Abstract
The utility model discloses a measuring device for be used for sign liquid level in liquid container, include the float, help heavy piece and mark subassembly, liquid container is including holding the chamber and filling the dress mouth, measuring device stretches into and holds intracavity portion through filling the dress mouth, the one end of float with help heavy piece to be connected, the other end is connected with the mark subassembly, be equipped with on the mark subassembly corresponding to the first mark of holding intracavity first liquid level height, when liquid level in the liquid container reached first liquid level height, first mark flushed with predetermined viewing position. The liquid level measuring device can ensure accurate identification of the filling level of the refrigerant, can ensure the filling result of the liquid in various application environments, saves the filling preparation, and simultaneously reduces the safety risk caused by special types of liquid by avoiding over filling.
Description
Technical Field
The utility model belongs to the liquid level measurement field relates to a measuring device for liquid level in sign liquid container.
Background
In the prior art, a liquid level in a liquid container is generally measured using a scale, a level gauge, or the like, but when cryogenic liquid is stored in the liquid container, various problems may occur in the conventional measurement method. Take a Dry dewar (Dry Shipper) as an example, it scientifically solves the problem of the great evaporation loss of cryogenic liquid due to thermal convection, conduction and radiation when the cryogenic liquid, such as liquid nitrogen, liquid argon, liquid oxygen, etc., is stored in a container. The dry type dewar tank has excellent heat insulation performance, can minimize the natural evaporation loss of low-temperature liquid stored in the dry type dewar tank, can keep the internal temperature for a long time, and is widely applied to the fields of animal husbandry, medical treatment, scientific research, machining and the like.
In the prior art, when liquid nitrogen is flushed into a dry Dewar tank, the cold source liquid nitrogen is usually sprayed down from the upper part of the dry Dewar tank, the heat exchange of the upper half part area of the dry Dewar tank is sufficient, the lower half part is easy to form accumulation, the liquid nitrogen is easy to distribute unevenly, and insufficient freezing or excessive freezing causes blockage.
During the filling of a dry dewar, the filling of the cryogen is difficult to accurately measure and identify. If the fill level is higher than the stopper position of the dewar, excess cryogen will spill over, not only presenting a safety risk, but also tending to cause blockages at the stopper. If the fill level is too low, the desired freezing effect cannot be achieved. Adopt low temperature resistant scale to measure the degree of depth of cryogenic liquid that has filled in the dry-type dewar jar among the prior art usually, with in the scale disect insertion jar, the temperature of cryogenic liquid face is lower, can frosting on the scale and form the vestige, can judge cryogenic liquid's degree of depth according to the position of frosting after the scale takes out. However, in practical application, the outside air is dry, and the trace formed on the graduated scale by the low-temperature liquid surface is not obvious any more and is difficult to judge. Therefore, in order to ensure the filling result of the dry dewar tank to sufficiently perform the function of the dry dewar tank, an operator has to overfill the dry dewar tank, so that the low-temperature liquid is easily overflowed after filling, which not only causes waste, but also has a safety hazard.
In view of the above, the problem of measuring the liquid level in a liquid container, especially the accurate identification and control of the refrigerant filling level in a dry dewar and other containers, is very important, and those skilled in the art need to develop a liquid level measuring device, which can ensure the liquid filling result in various environments, save the filling agent, and reduce the safety risk caused by the special type of liquid by avoiding over-filling.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problem in the prior art, the utility model provides a measuring device for liquid level in the sign liquid container, especially a measuring device of sign dry-type dewar jar interior liquid level.
In order to realize the above-mentioned purpose, the utility model discloses a measuring device for marking liquid level in liquid container, include the float, help heavy piece and mark subassembly, liquid container is including holding the chamber and filling the mouth, measuring device stretches into through filling the mouth and holds intracavity portion, the one end of float with help heavy piece to be connected, the other end is connected with the mark subassembly, be equipped with on the mark subassembly corresponding to the first mark of holding intracavity first liquid level height, when liquid level in the liquid container reached first liquid level height, first mark flushed with predetermined viewing position.
Further, the liquid container is a dry dewar.
Further, the filling opening is directed vertically upwards.
Further, the observation position is at a cavity opening of the liquid container.
Further, the first liquid level height is the highest liquid level of the liquid filled in the dry Dewar tank.
Further, the marking assembly is at a first angle with respect to the float, the axis of the filling port is at a second angle with respect to the horizontal, and the first and second angles are equal.
Further, the liquid is a cryogenic liquid.
Further, the liquid is liquid nitrogen, liquid helium or liquid argon.
Further, the sinking-assisting piece is a lead weight or a plumb bob.
Furthermore, one end of the floater is connected with the sinking-assistant piece in an adhering, clamping or bolting mode.
Furthermore, the other end of the floater is connected with the marking assembly in an adhering, clamping or bolting mode.
Furthermore, the measuring device also comprises a clamping device, and the marking assembly is clamped on the inner wall of the liquid container through the clamping device.
Further, the marking assembly is a stainless steel pipe provided with scales.
Further, one or more marks are arranged between the starting mark and the first mark of the marking assembly.
Compared with the prior art, the utility model provides a technical scheme has following advantage:
the liquid level measuring device can ensure accurate identification of the filling level of the refrigerant, can ensure the filling result of the liquid in various application environments, saves the filling preparation, and simultaneously reduces the safety risk caused by special types of liquid by avoiding over filling.
Drawings
The advantages and spirit of the present invention can be further understood by the following detailed description of the invention and the accompanying drawings.
Fig. 1 is a schematic structural view of a dry dewar tank provided by the present invention;
FIG. 2 is a simple schematic view of a measuring apparatus according to the first embodiment;
FIG. 3 is a flow chart of the combination of the dry Dewar flask and the measuring device according to the first embodiment;
fig. 4 is a combination of the dry dewar and the measuring device and a measuring flow chart in the second embodiment.
Detailed Description
The following detailed description of the embodiments of the present invention refers to the accompanying drawings. However, the present invention should be understood not to be limited to such an embodiment described below, and the technical idea of the present invention may be implemented in combination with other known techniques or other techniques having the same functions as those of the known techniques.
In the following description of the embodiments, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms are used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "axial", "radial", etc. should be construed as words of convenience and should not be construed as limiting terms.
In the following description of the specific embodiments, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Unless clearly indicated to the contrary, each aspect or embodiment defined herein may be combined with any other aspect or embodiments. In particular, any feature indicated as being preferred or advantageous may be combined with any other feature indicated as being preferred or advantageous.
Description of the terms
As used herein, "Dry dewar", "Dry Shipper", "dewar" and "dewar" are intended to have the same meaning and are used interchangeably and refer to a Dry freezer or Dry shipping container containing a porous adsorbent material designed for safe transport of samples. The dry type dewar tank adopted in the embodiment of the utility model is available on the market, and as an example, the aluminum alloy biological transportation liquid nitrogen biological container and the like with models such as Hal YDS-2-30, YDH-3, YDH-6-80, YDH-8-80, YDH-10-125-F, YDH-25-216-F and the like can be selected.
As used herein, "near saturation" means that the cryogenic liquid level does not drop significantly for a short period of time or the gauge count does not change over time after the dry dewar is continuously filled with cryogenic liquid at standard atmospheric pressure, indicating that the adsorption of the porous adsorbent material has reached "near saturation". The "short time" may be set to a time equal to or longer than 5 minutes, or, a time equal to or longer than 20 minutes.
As used herein, the adsorption of cryogenic liquid by the porous adsorbent material is "saturated" in the sense that cryogenic liquid is substantially adsorbed by the porous adsorbent material. By way of example, using liquid nitrogen as the cryogenic liquid means that during the filling of the liquid nitrogen, the portion of the pore free volume within the porous adsorbent material that is not completely filled is filled with liquid nitrogen. After the vacuumizing device is started, residual air (particularly nitrogen in the air) trapped in the pores of the porous adsorption material is liquefied (the boiling point of oxygen is-183 ℃ at the standard atmospheric pressure, and the residual air is liquefied by liquid nitrogen in the filling process), so that the filling speed and the filling degree of the liquid nitrogen are increased.
As used herein, cryogenic liquids used to fill dewars include, but are not limited to, liquid nitrogen.
As used herein, "continuously or intermittently" charging the dry dewar with cryogenic liquid means that the "charging with cryogenic liquid" can be performed continuously or continuously, or alternatively, the same or different time periods can be separated during each two "charging with cryogenic liquid" operations, for example, 1 to 120 minutes, or 5 to 90 minutes, or 10 to 60 minutes.
As used herein, "float" refers to a type of floatation device that may be configured as a hollow, including a cork, a float, or any other floatation material suitable for use in a floatation device. The marker assembly may be floated above the liquid by the buoyancy of the float.
As used herein, the marker assembly and the float may be aligned or angled, which may be referred to as a "first angle", when assembled, such that the marker assembly is bent at a portion and then connected to the float, and the central longitudinal axis of the filling port is correspondingly angled with respect to the central longitudinal axis of the liquid container such that the marker assembly, after being bent, extends into the liquid container in accordance with the angle of the filling port of the liquid container. The location of the marking element extending into the filling opening can be selected as desired, for example the marking element can extend from the very middle of the filling opening or can be adjacent to the edge of the filling opening.
As used herein, a sink-assist is a weight that increases the sinking speed and anchoring ability, and by adjusting the weight of the sink-assist, it is advantageous to maintain a stable level measurement during filling.
As used herein, a first mark may be a balance line, a tick mark value on the marking assembly. The relative position of the first indicia on the marking assembly can be selected by one skilled in the art as desired to indicate different fill levels within the liquid container, for example, a liquid container filled to 30% by volume, or 50% by volume, or to a near saturated condition, or to an overfill condition. Similarly, one skilled in the art can set a plurality of marks on the marking assembly as required, wherein the first mark is only one mark, and other marks can correspondingly indicate different liquid level heights in the liquid container.
Raw materials and apparatus
The utility model discloses the model of dry-type dewar jar that uses is YDS-2-30, and the main parameter includes: liquid nitrogen capacity: 2L, caliber: 30mm, total height: 378mm, outer diameter: 224mm, empty weight: 2.9kg, full weight: 4.5kg, duration of normal operation: and 21 days.
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings 1-4.
Example 1
In the initial state, the dry Dewar flask is not filled with liquid nitrogen, and the whole measuring device is only influenced by self gravity. The float and the sinking-assisting piece are gradually immersed into the liquid nitrogen along with the filling of the liquid nitrogen, the marking assembly is driven to change along with the change of the liquid level height of the liquid nitrogen, therefore, the distance between the first mark on the marking assembly and the preset observation position also changes along with the change of the liquid level, and the measuring device can be used for determining the amount of the liquid nitrogen filled in the dry type Dewar tank because the change of the liquid level is caused by the change of the amount of the liquid nitrogen in the dry type Dewar tank.
By way of example only, for the dry dewar used in the present embodiment, the predetermined viewing position may be provided at the neck of the filling port of the dry dewar or at the receiving port of the dry dewar, and when the first mark on the marking member gradually floats to be flush with the predetermined viewing position, which represents that a filling operation is completed, the liquid level in the dry dewar reaches a desired maximum level.
When filling operation is carried out, fill the liquid nitrogen to interior filling through the filling mouth of dry-type dewar jar, the opening direction that fills the mouth can be vertical upwards, also can set up to: the axis of the filling port is at a second angle from horizontal that is comparable to the first angle formed between the marker assembly and the float, facilitating the extension of the marker assembly and float from the filling port into the interior of the dry dewar tank.
The following exemplary description describes the steps for detecting whether the dry Dewar tank is filled or not by using the measuring device provided by the present invention:
(1) firstly, providing a dry type dewar tank with a required model;
(2) calibrating the position of the first marker on the marker assembly: calculating the position of a first mark on the marking assembly according to parameters such as the type of the filled low-temperature liquid, the volume of the dry Dewar tank, the weight of the floater and the sinking-assisting piece, and the like, wherein the first mark represents that the liquid level in the dry Dewar tank reaches the highest position; alternatively, the second mark, the third mark may be determined in the same manner to represent a filling amount of 30%, a filling amount of 50%, and the like, respectively;
(3) providing a measuring device: connecting one end of a floater with a sinking-assistant piece, and connecting the other end of the floater with a marking component, and keeping the floater component and the sinking-assistant piece completely arranged in a containing cavity of a dry type dewar tank;
(4) filling: filling the dry dewar tank with a cryogenic liquid (e.g., liquid nitrogen) while maintaining the viewing position at the neck of the filling port until the first marking on the marking assembly is flush with the viewing position, and stopping filling;
(5) optionally repeating step (4) until the porous adsorbent material in the dry dewar tank is saturated with cryogenic liquid.
In this embodiment, taking the dry dewar as an example of a liquid container adsorbing liquid nitrogen, the dry dewar includes a porous adsorbing material therein, in order to make the adsorption of the porous adsorbing material reach a state close to saturation, an operation of continuously or intermittently filling liquid nitrogen for many times is usually required, and in the process of filling liquid nitrogen each time, the position of the filling liquid level in the dry dewar can be identified by using the measuring device shown in this embodiment, so that an operator can know the liquid level condition of this filling.
FIG. 1 is a schematic structural view of a dry dewar vessel; wherein, 1 is the dry-type dewar jar, 7 is the filling port of dry-type dewar jar, 8 is the appearance chamber of dry-type dewar jar, 2 is porous adsorption material, 3 is filling port neck. The porous adsorption material can adsorb liquid nitrogen added from a filling port of the dry Dewar tank.
Fig. 2 shows a simple schematic view of the measuring device of the present embodiment, which includes a float 4, a sinking aid 5 and a marking assembly 6, wherein one end of the float 4 is connected with the sinking aid 5, and the other end is connected with the marking assembly 6. The entire measuring device projects through the filling opening 7 into the interior of the chamber 8 of the dry dewar.
Fig. 3 shows an exemplary combination of a dry dewar and a measuring device and a measuring process. The preset viewing position is stabilized at the neck of the filling opening 7 of the dry dewar, i.e. at the outermost edge of the opening. When the dry dewar tank is in an empty state, as shown in fig. 3 (a), the marker assembly 6 and the float 4 are entirely sunk to the lower portion of the dry dewar tank by its own weight and the weight of the sinking aid 5. For example, on marker assembly 6, scale line C may be pre-marked as the location where the dry dewar is filled to 50%, scale line B may be pre-marked as the location where the dry dewar is filled to 100%, and scale line a may be pre-marked as the location where the dry dewar is filled to an excessive amount.
As shown in fig. 3 (B) and 3 (C), as liquid nitrogen is filled, the float 4 and the sinking-assisting piece 5 gradually immerse into the liquid nitrogen, the float starts to float upwards, and the scale mark on the marking assembly 6 gradually goes from the position C to the position B to the position a as seen from the preset observation position. The point B represents that the porous adsorbent material in the dry dewar tank is substantially saturated with the adsorbent material, indicating that the dry dewar tank is completely filled. If the filling is continued, as shown in fig. 3 (d), the point a represents the filling excess, and the amount of the liquid nitrogen filled in the dry dewar tank exceeds the adsorption capacity of the porous adsorption material in the dry dewar tank, resulting in the waste of the liquid nitrogen.
Example 2
Fig. 4 shows another exemplary combination of a dry dewar and a measuring device and a measuring process. The measuring device can be inserted into the filling opening close to the edge of the filling opening, and the person skilled in the art can fix the measuring device to the filling opening in various ways, for example by snapping, welding or bolting. Accordingly, fig. 4 (a) -4 (d) show schematic flow charts of filling liquid nitrogen in the dry dewar tank in this case. The scale A, B, C has the same meaning as in example 1.
The terms "first" and "second" as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, unless otherwise specified. Similarly, the appearances of the phrases "a" or "an" in various places herein are not necessarily all referring to the same quantity, but rather to the same quantity, and are intended to cover all technical features not previously described. Similarly, modifiers similar to "about", "approximately" or "approximately" that occur before a numerical term herein typically include the same number, and their specific meaning should be read in conjunction with the context. Similarly, unless a specific number of a claim recitation is intended to cover both the singular and the plural, and embodiments may include a single feature or a plurality of features.
The preferred embodiments of the present invention are described in the specification, and the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit the present invention. All technical solutions that can be obtained by logical analysis, reasoning or limited experiments according to the concept of the present invention by those skilled in the art are within the scope of the present invention.
Claims (10)
1. The utility model provides a measuring device for liquid level in sign liquid container, its characterized in that, includes the float, helps heavy piece and mark subassembly, liquid container is including holding the chamber and filling the dress mouth, measuring device stretches into through filling the dress mouth and holds intracavity portion, the one end of float with help heavy the piece to be connected, the other end is connected with the mark subassembly, be equipped with on the mark subassembly and correspond to the first mark of holding intracavity first liquid level height, when the liquid level in the liquid container reached first liquid level height, first mark flushed with predetermined viewing position.
2. The measurement device of claim 1, wherein the liquid container is a dry dewar.
3. A measuring device as claimed in claim 1, wherein the viewing position is at the mouth of the liquid container.
4. The measuring device of claim 1, wherein the first liquid level height is at a highest level of a dry dewar tank fill liquid.
5. The measuring device of claim 1, wherein the marker assembly is at a first angle to the float and the axis of the filling port is at a second angle to the horizontal, the first and second angles being equal.
6. The measurement site of claim 1, wherein the liquid is a cryogenic liquid.
7. A measuring device according to claim 1, wherein the deflection aid is a lead weight or a plumb bob.
8. The measuring device according to claim 1, wherein one end of the float is connected to the sinking aid by means of an adhesive, snap or bolt, and/or the other end of the float is connected to the marking assembly by means of an adhesive, snap or bolt.
9. The measuring device of claim 1, further comprising a detent means by which the marker assembly snaps onto an inner wall of the liquid container.
10. The measuring device of claim 1, wherein one or more markers are further disposed between the start marker and the first marker of the marker assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922310884.1U CN210833776U (en) | 2019-12-20 | 2019-12-20 | Measuring device for marking the level of a liquid in a liquid container |
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| CN201922310884.1U CN210833776U (en) | 2019-12-20 | 2019-12-20 | Measuring device for marking the level of a liquid in a liquid container |
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| CN210833776U true CN210833776U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112938105A (en) * | 2021-02-03 | 2021-06-11 | 广州品捷生物科技有限公司 | Automatic storage system for deep hypothermia reproductive samples |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112938105A (en) * | 2021-02-03 | 2021-06-11 | 广州品捷生物科技有限公司 | Automatic storage system for deep hypothermia reproductive samples |
| CN112938105B (en) * | 2021-02-03 | 2022-11-15 | 广州品捷生物科技有限公司 | Automatic storage system for deep hypothermia reproductive samples |
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