Automatic cooling liquid limiting and spill-proof device of physical adsorption instrument
By designing automatic limiting and overflow prevention devices in the physical adsorption instrument, the limit funnel and closed-cell foamed floating plate are used to achieve automatic limiting of the coolant liquid level, and the sliding rod is used to prevent overflow from being removed from the Dewar bottle, which solves the problem of inconsistent coolant liquid level affecting the stability of experimental data, and achieves simple operation and good effect coolant management.
Patent Information
- Application Number
- CN202420915439.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-29
AI Technical Summary
In physical adsorbents, inconsistent liquid level position of the coolant will affect the stability of the experimental data. The existing visual measurement and ruler measurement methods are cumbersome and have poor accuracy, which can easily lead to coolant spillage.
An automatic limiting and anti-spill device for cooling liquid in the physical adsorbent is designed, including a cannula, a limiting funnel, a slide rod and a closed-cell foam floating plate. The coolant is slowly poured into the limit funnel, and the closed-cell foamed floating plate seals the bottom end of the cannula when the liquid level rises, achieving automatic limit of the liquid level, and detaching the dewar bottle through the lifting slide rod to prevent the coolant from overflowing.
It realizes automatic limiting of the liquid level position in the Dewar bottle, avoids coolant overflow, is simple and convenient to operate, and has good use effect.
Smart Images
Figure CN222671648U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of physical adsorption instruments, in particular to an automatic position limiting and overflow prevention device for cooling liquid of a physical adsorption instrument. Background Art
[0002] When using a physical adsorption instrument to test a sample, a Dewar flask filled with coolant (usually liquid nitrogen) is usually used to cool the sample tube. Therefore, the Dewar flask needs to be filled with coolant before testing. Inconsistent coolant filling level will affect the experimental data, especially the stability of the data.
[0003] In order to minimize the impact of inconsistent coolant level position on data stability in each test, the current method of pouring and visually inspecting the liquid level or using a ruler to measure the liquid level is often used. However, the visual inspection and ruler methods are not only cumbersome, but also have poor accuracy. It is easy to exceed the required liquid level and even cause coolant overflow, posing a risk of coolant contact. For this reason, we propose a coolant automatic limit and overflow prevention device. Utility Model Content
[0004] The purpose of the utility model is to provide a physical adsorption instrument cooling liquid automatic limit and overflow prevention device to solve the problems raised in the above background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] The invention discloses an automatic limit and overflow prevention device for cooling liquid of a physical adsorption instrument, comprising a cannula inserted into the opening of a Dewar flask, the top of the cannula is fixedly connected to a limit funnel, the bottom of the limit funnel is a plane, and the bottom of the limit funnel fits the open end of the cannula, a sliding rod is passed through the inner side of the cannula, and the bottom end of the sliding rod is fixedly connected to a closed-cell foaming floating plate.
[0007] As a further solution of the utility model: the inner wall of the insertion tube is fixedly connected to a guide sleeve via at least one connecting strip, and the sliding rod passes through the guide sleeve.
[0008] As a further solution of the utility model: a sealing pad is fixedly connected to the top surface of the closed-cell foam floating plate, the bottom end of the insert is configured to be constricted, and a groove matching the bottom end of the insert is provided on the top of the sealing pad.
[0009] As a further solution of the utility model: a sealing ring is embedded in the outer wall of the insert tube, and the outer wall of the sealing ring is in contact with the inner wall of the opening of the Dewar flask.
[0010] As a further solution of the utility model: a handle is fixedly connected to the top end of the sliding rod.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] When the utility model is in use, cooling liquid is slowly poured into the Dewar flask through the limiting funnel, and the closed-cell foaming float plate will slowly move upwards with the liquid level until the closed-cell foaming float plate blocks the bottom end of the insert tube under the action of buoyancy. At this time, the cooling liquid poured into the limiting funnel will be accumulated in the insert tube and cannot be discharged. It only needs to lift the sliding rod to drive the insert tube to leave the Dewar flask through the closed-cell foaming float plate, thereby realizing automatic limiting of the liquid level position in the Dewar flask and preventing the cooling liquid from overflowing. The operation is simple and convenient, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the automatic limit and overflow prevention device for the cooling liquid of the physical adsorption instrument.
[0014] Figure 2 This is a schematic diagram of the structure of the connecting strip in the automatic limit and overflow prevention device for the cooling liquid of the physical adsorption instrument.
[0015] Figure 3 for Figure 1 Enlarged view of point A in the middle.
[0016] Among them, there are a cannula 1, a sealing ring 2, a limiting funnel 3, a guide sleeve 4, a connecting strip 5, a sliding rod 6, a closed-cell foaming floating plate 7, a sealing gasket 8, a groove 9, a handle 10, and a Dewar flask 11. DETAILED DESCRIPTION
[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0019] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation in the specification, and therefore cannot be understood as a limitation on the present invention.
[0020] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.
[0021] See also Figures 1 to 3 In the embodiment of the utility model, the automatic limit and overflow prevention device of the coolant of the physical adsorption instrument includes a cannula 1 inserted into the opening of the Dewar flask 11, the top of the cannula 1 is fixedly connected to the limit funnel 3, the bottom of the limit funnel 3 is a plane, and the bottom of the limit funnel 3 is in contact with the open end of the cannula 1, a sliding rod 6 is passed through the inner side of the cannula 1, and the bottom end of the sliding rod 6 is fixedly connected to a closed-cell foaming floating plate 7.
[0022] The utility model adopts the above scheme. When in use, the cannula 1 is inserted into the bottle mouth of the Dewar flask 11, and the bottom of the limiting funnel 3 is fitted with the bottle mouth end of the Dewar flask 11, and the coolant is slowly poured into the Dewar flask 11 through the limiting funnel 3. At this time, the liquid level in the Dewar flask 11 slowly rises, and pushes the closed-cell foaming float 7 to slowly move upward until the closed-cell foaming float 7 is against the bottom end of the cannula 1, and the bottom end of the cannula 1 is blocked under the action of buoyancy. At this time, the coolant poured into the limiting funnel 3 will be accumulated in the cannula 1 and cannot be discharged. It only needs to lift the sliding rod 6 to drive the cannula 1 to leave the Dewar flask 11 through the closed-cell foaming float 7, thereby realizing the automatic limiting of the liquid level position in the Dewar flask 11 and preventing the coolant from overflowing. The operation is simple and convenient, and the use effect is good.
[0023] Specific combination Figure 1 and Figure 2 In one embodiment of the utility model, the inner wall of the cannula 1 is fixedly connected to the guide sleeve 4 via at least one connecting strip 5 , and the slide rod 6 passes through the guide sleeve 4 .
[0024] The guide sleeve 4 can guide the slide bar 6 and the closed-cell foaming float 7 , so that the closed-cell foaming float 7 can be accurately aligned with the bottom end of the cannula 1 when it rises.
[0025] Specific combination Figure 1 and Figure 3 In one embodiment of the utility model, a sealing pad 8 is fixedly connected to the top surface of the closed-cell foaming floating plate 7, the bottom end of the insert tube 1 is configured with a constricted opening, and a groove 9 adapted to the bottom end of the insert tube 1 is provided on the top of the sealing pad 8.
[0026] By setting the sealing gasket 8, when the closed-cell foaming float 7 rises to a certain height along with the liquid level, the bottom end of the insert tube 1 will be inserted into the groove 9 on the sealing gasket 8, thereby ensuring the sealing effect between the insert tube 1 and the closed-cell foaming float 7.
[0027] Specific combination Figure 1 In one embodiment of the utility model, a sealing ring 2 is embedded in the outer wall of the cannula 1 , and the outer wall of the sealing ring 2 is in contact with the inner wall of the opening of the Dewar flask 11 .
[0028] By setting the sealing ring 2, the sealing between the cannula 1 and the bottle mouth of the Dewar flask 11 can be achieved. Since the coolant used in the physical adsorption instrument is usually liquid nitrogen, and the liquid nitrogen has strong volatility, when the liquid nitrogen is poured into the Dewar flask 11, and the closed-cell foaming float plate 7 rises with the liquid level of the liquid nitrogen to the bottom end of the cannula 1 and is inserted into the groove 9 on the sealing gasket 8, a sealed space is formed inside the Dewar flask 11, and the volatilized liquid nitrogen cannot be discharged, which will increase the pressure in the Dewar flask 11, so that the bottom end of the cannula 1 is more closely attached to the inner wall of the groove 9, so as to further prevent the liquid nitrogen from seeping out from the bottom end of the cannula 1, and the use effect is good.
[0029] Specific combination Figure 1 In one embodiment of the present invention, a handle 10 is fixedly connected to the top of the slide bar 6 , so that the slide bar 6 can be easily lifted by the handle 10 .
[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. Automatic limit and overflow prevention device for cooling liquid of physical adsorption instrument, characterized by: The invention comprises a cannula (1) which is inserted into the opening of a Dewar flask (11); the top of the cannula (1) is fixedly connected to a limiting funnel (3); the bottom of the limiting funnel (3) is a plane, and the bottom of the limiting funnel (3) is in contact with the opening end of the cannula (1); a sliding rod (6) is passed through the inner side of the cannula (1); the bottom end of the sliding rod (6) is fixedly connected to a closed-cell foaming floating plate (7).
2. The automatic limit and overflow prevention device for cooling liquid of a physical adsorption instrument according to claim 1 is characterized in that: The inner wall of the insertion tube (1) is fixedly connected to a guide sleeve (4) via at least one connecting strip (5), and the sliding rod (6) passes through the guide sleeve (4).
3. The automatic limit and overflow prevention device for cooling liquid of a physical adsorption instrument according to claim 1 is characterized in that: A sealing pad (8) is fixedly connected to the top surface of the closed-cell foaming floating plate (7), the bottom end of the insert tube (1) is configured to be constricted, and a groove (9) adapted to the bottom end of the insert tube (1) is provided on the top of the sealing pad (8).
4. The automatic limit and overflow prevention device for cooling liquid of a physical adsorption instrument according to claim 1 is characterized in that: A sealing ring (2) is embedded in the outer wall of the cannula (1), and the outer wall of the sealing ring (2) is in contact with the inner wall of the opening of the Dewar flask (11).
5. The automatic limit and overflow prevention device for cooling liquid of a physical adsorption instrument according to claim 1 is characterized in that: The top end of the sliding rod (6) is fixedly connected with a handle (10).