CN108489570B - Liquid filling metering device and pulse refrigeration system - Google Patents
Liquid filling metering device and pulse refrigeration system Download PDFInfo
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- CN108489570B CN108489570B CN201810105093.2A CN201810105093A CN108489570B CN 108489570 B CN108489570 B CN 108489570B CN 201810105093 A CN201810105093 A CN 201810105093A CN 108489570 B CN108489570 B CN 108489570B
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- liquid
- storage cylinder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
- F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
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- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Basic Packing Technique (AREA)
Abstract
The invention relates to liquid metering, and provides a liquid filling metering device which comprises a liquid storage cylinder and a four-way joint, wherein the four-way joint is provided with two first interfaces which can be respectively communicated with a refrigerator and a compressor, two second interfaces which are communicated with the two first interfaces, the liquid storage cylinder is communicated with one of the second interfaces, the four-way joint also comprises a liquid guide rod extending into the liquid storage cylinder and a driving assembly driving the liquid guide rod to move along the liquid storage cylinder, the diameter of the liquid guide rod is millimeter, and a liquid sealing rod extending into the four-way joint and movably sealing the liquid storage cylinder is arranged at the other second interface; also provides a pulse refrigeration system, which comprises the device. According to the invention, the diameter of the liquid guide rod is millimeter level, and when the liquid guide rod is pushed by the driving assembly to move in the millimeter level in the liquid storage cylinder, the volume of liquid discharged in the liquid storage cylinder is millilitre level, namely milligram level liquid can be filled once by the device with the structure, and the millilitre level liquid can be continuously filled for many times by the movement of the liquid guide rod, so that the liquid guide rod is accurate, reliable and convenient to operate.
Description
Technical Field
The invention relates to liquid metering, in particular to a liquid filling metering device and a pulse refrigeration system.
Background
The flowmeter plays an important role in the fields of industrial production, scientific research and the like, the flowmeters required by scientific experiments are large in quantity and complex in quantity, and a part of the flowmeters are required by scientific research. Also in milligram flow meter measurements, because the gas density is greater than the liquid, flow meters engineered to meter milligram gases are far more easily implemented than metering milligram liquids. In the requirement of a specific scientific experiment, milligram-level trace liquid is added into a high-pressure environment, so that the filling quantity of the liquid cannot be measured by using the conventional flowmeter.
Disclosure of Invention
The invention provides a liquid filling and metering device aiming at the problems and the defects, and the liquid filling and metering device can realize milligram-level liquid metering.
The invention is realized by the following steps:
the embodiment of the invention provides a liquid filling metering device which comprises a liquid storage cylinder and a four-way joint, wherein the four-way joint is provided with two first interfaces which can be respectively communicated with a refrigerator and a compressor, two second interfaces which are communicated with the two first interfaces, the liquid storage cylinder is communicated with one of the second interfaces, the four-way joint further comprises a liquid guide rod extending into the liquid storage cylinder and a driving assembly driving the liquid guide rod to move along the liquid storage cylinder, the diameter of the liquid guide rod is millimeter, and a liquid sealing rod extending into the four-way joint to movably seal the liquid storage cylinder is installed at the other second interface.
Further, the liquid outlet department of liquid storage cylinder is provided with and has the capillary from the function of proclaiming oneself and can stretch into and correspond tubule in the second interface, the tubule intercommunication liquid storage cylinder and bore are less than the liquid storage cylinder.
Further, the driving assembly comprises a piston cylinder and a piston rod extending into the piston cylinder, the piston rod is in threaded connection with the inner wall of the piston cylinder, the piston rod is fixedly connected with the liquid guide rod, and the piston rod and the liquid guide rod are located on the same straight line.
Further, the diameter of the liquid guide rod is 2mm, and the thread pitch of the piston rod is 0.635 mm.
Furthermore, one end of the liquid guide rod extends into the liquid storage cylinder, and the other end of the liquid guide rod extends into the piston cylinder and is fixedly connected with the piston rod.
Furthermore, one end of the piston rod is fixedly connected with the liquid guide rod, and the other end of the piston rod extends out of the piston cylinder and is provided with a first handle.
Further, the liquid guide rod is axially sealed with the inner wall of the liquid storage cylinder through a tetrafluoro sealing ring, and the tetrafluoro sealing ring is radially compressed through a tetrafluoro sealing gland.
Further, the at least part of liquid storage cylinder stretches into and corresponds in the second interface, just the liquid storage cylinder stretches into and corresponds the intraoral tip of second interface is provided with the tetrafluoro sealing washer, seal liquid pole stretches into tip in the four-way connection be provided with can with the sealed tetrafluoro of tetrafluoro sealing washer cooperation seal seals up liquid tetrafluoro piece.
Further, seal liquid pole with correspond threaded connection between the second interface, it has to be located to seal liquid pole the second handle in the four-way connection outside, just seal liquid pole with through the cooperation of tetrafluoro sealing washer and tetrafluoro gland between the second interface and seal.
The embodiment of the invention also provides a pulse refrigerating system which comprises a refrigerator, a compressor and the liquid filling metering device, wherein the refrigerator is communicated with one of the first interfaces through a refrigerator connecting pipe, and the compressor is communicated with the other first interface through a compressor connecting pipe.
The invention has the following beneficial effects:
in the device, before filling, the liquid storage cylinder is emptied, so that only liquid is stored in the liquid storage cylinder, and as the diameter of the liquid guide rod is millimeter, when the liquid guide rod is pushed to move along the liquid storage cylinder, and the pushing distance is millimeter, the volume of the liquid discharged from the liquid storage cylinder is millilitre, namely milligram-level liquid can be filled once by the device with the structure, and the liquid can be continuously filled for multiple times by the movement of the liquid guide rod.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a liquid filling metering device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a liquid filling and metering device, including a liquid storage barrel 1 and a four-way joint 2, where the four-way joint 2 has four interfaces, which are two first interfaces 21 and two second interfaces 22, respectively, where the two second interfaces 22 are both communicated with the two first interfaces 21, that is, the four interfaces are communicated with each other, preferably, the two first interfaces 21 are located on a same straight line, the two second interfaces 22 are located on a same straight line, and the two straight lines intersect, the two first interfaces 21 can be used to communicate with a refrigerator and a compressor, respectively, the liquid storage barrel 1 can be communicated with one of the second interfaces 22, the device further includes a liquid guiding rod 11 and a driving assembly 3, the liquid guiding rod 11 can penetrate into the liquid storage barrel 1, and the driving assembly 3 can drive the liquid guiding rod 11 to move along the liquid storage barrel 1, and further can push the liquid in the liquid storage barrel 1 to be discharged from a liquid outlet of the liquid storage barrel 1, the diameter of drain pole 11 is the millimeter level, and the diameter of drain pole 11 does not exceed 1 centimetre promptly, installs the liquid sealing rod 4 that stretches into in the four-way connection 2 in second interface 22 department, and this liquid sealing rod 4 can seal corresponding second interface 22, and can the liquid outlet of activity shutoff liquid storage cylinder 1. In the embodiment, the liquid storage cylinder 1 is filled with liquid to be filled, and redundant air is discharged through the liquid guide rod 11; the liquid storage cylinder 1 is arranged on the corresponding second interface 22 of the four-way joint 2, and the liquid outlet of the liquid storage cylinder 1 is blocked by the liquid blocking rod 4, so that the liquid in the liquid storage cylinder 1 is prevented from leaking; after the device stores liquid and is installed, the compressor and the refrigerator are respectively communicated with the two first interfaces 21, and the device is embedded into a refrigerator system; vacuumizing the whole pipeline (liquid in the liquid storage cylinder 1 cannot leak out under the action of the liquid sealing rod 4), adding helium into the system to 4MPa, and starting up the system for operation; after the temperature curve of the cold head of the refrigerator is stable, the liquid sealing rod 4 is opened, the liquid guide rod 11 can be controlled to move to one side of the liquid outlet of the liquid storage cylinder 1 through the driving assembly 3, and then the purpose of adding liquid can be achieved. In the above-mentioned process, because the diameter of drain pole 11 is the millimeter level, then when promoting drain pole 11 and remove the millimeter level, the liquid volume of discharge is milli-upgrade in the liquid storage cylinder 1, can annotate milligram level liquid once through the device of this kind of structure promptly, and can last a lot of filling through the removal of drain pole 11.
Optimize above-mentioned embodiment, the liquid outlet of liquid storage barrel 1 is provided with and has tubule 12, and this tubule 12 is as the drain pipe of liquid storage barrel 1, and liquid in the liquid storage barrel 1 is discharged by the drain pipe, and this tubule 12 can integrated into one piece with liquid storage barrel 1 certainly, and the bore of tubule 12 is less than the bore of liquid storage barrel 1 for this tubule 12 has the capillary and proclaims oneself the function, and liquid in the liquid storage barrel 1 can not automatic outflow. When the liquid sealing rod 4 seals the liquid storage cylinder 1, the liquid sealing rod 4 seals the narrow tube 12, so that the liquid in the liquid storage cylinder 1 flows to the two first connectors 21.
The embodiment of the present invention provides a driving assembly 3, where the driving assembly 3 can be applied to the above-mentioned device, specifically, the driving assembly 3 includes a piston cylinder 31 and a piston rod 32, the piston rod 32 is in threaded connection with an inner wall of the piston cylinder 31, the piston rod 32 is fixedly connected with the liquid guide rod 11, and the piston rod 32 and the liquid guide rod 11 are located on the same straight line, and both can be connected by fiber welding. In this embodiment, piston cylinder 31 and liquid storage cylinder 1 are connected fixedly, and both form a whole, rotatory piston rod 32, because piston rod 32 and piston cylinder 31 threaded connection, then piston rod 32 still is linear movement along piston cylinder 31 when rotatory, and then drives drain bar 11 synchronous motion by piston rod 32, and in this kind of structure, piston rod 32 drives drain bar 11 synchronous rotation, and both synchronous motion. The liquid guiding rod 11 and the piston rod 32 may also be in a rotational connection, and the piston rod 32 may rotate relative to the liquid guiding rod 11, that is, when the piston rod 32 rotates, the liquid guiding rod 11 does not rotate, but the piston rod 32 drives the liquid guiding rod 11 to move synchronously.
Optimize the structure of above-mentioned drive assembly 3, the one end of drain rod 11 stretches into in the liquid storage cylinder 1, and the other end stretches into in the piston cylinder 31 and is connected fixedly with piston rod 32. In the structure, one part of the liquid guide rod 11 is positioned in the liquid storage cylinder 1, the other part of the liquid guide rod 11 is positioned in the piston cylinder 31, the diameter of the liquid guide rod 11 is the same as or close to the inner diameter of the liquid storage cylinder 1, the outer surface of the liquid guide rod 11 is in contact with the inner wall of the liquid storage cylinder 1, so that the liquid guide rod 11 can push liquid with the same volume to be discharged out of the liquid storage cylinder 1 in the moving process, the diameter of the liquid guide rod 11 is smaller than the inner diameter of the piston cylinder 31, namely, a gap is formed between the liquid guide rod 11 and the piston cylinder 31, and the liquid guide rod 11 is not in threaded connection with the piston cylinder. For the piston rod 32, one end is connected and fixed with the liquid guiding rod 11, the other end extends out of the piston cylinder 31, and the first handle 33 is installed at the end part of the extending part of the piston rod 32, that is, the rotation of the piston rod 32 is controlled by rotating the first handle 33, which is convenient. Generally, a nut 34 is installed at an end of the piston cylinder 31 far from the liquid storage cylinder 1, the piston cylinder 31 is sealed by the nut 34, and the piston rod 32 is penetrated out of the nut 34. In addition, because the liquid guide rod 11 and the liquid storage barrel 1 rotate relatively and move relatively, transition fit between the liquid guide rod 11 and the inner wall of the liquid storage barrel 1 is impossible, the liquid guide rod 11 and the inner wall of the liquid storage barrel 1 are axially sealed through the tetrafluoro sealing ring 13, and the tetrafluoro sealing ring 13 is radially pressed through the tetrafluoro sealing gland 14. Thread connection between tetrafluoro gland 14 and the liquid storage barrel 1, at the in-process of screwing tetrafluoro gland 14 in the liquid storage barrel 1, tetrafluoro gland 14 compresses tightly tetrafluoro sealing washer 13 gradually, and then guarantees the sealing performance between drain bar 11 and the liquid storage barrel 1.
In the preferred embodiment, the diameter of the liquid guiding rod 11 is 2mm, and the piston rod 32 is threaded with British M4 and has a thread pitch of 0.635 mm. In this embodiment, when the piston rod 32 rotates one turn, the linear moving distance is 0.635mm, which means that the piston rod 32 rotates one turn, and the liquid guiding rod 11 pushes the liquid volume V ═ pi r in the liquid storage cylinder 12And r is d/2, it is possible to calculate that V is 2ml for one rotation of the piston rod 32 and 1ml for one half rotation of the piston rod 32, and when converting to mass, the piston rod 32 is rotated once, and 2mg of liquid can be filled in the reservoir 1 and 1mg of liquid can be filled in the half rotation. In conclusion, the liquid with the corresponding volume can be filled by rotating the first handle 33 for a plurality of times, which is very convenient and reaches milligram-level filling, and the liquid volume in the liquid storage cylinder 1 is larger than 2ml, namely the liquid can be continuously and accurately filled for a plurality of times by rotating the first handle 33.
The embodiment of the invention also provides a liquid sealing rod 4, of course, the liquid sealing rod 4 is also applied to the above-mentioned device, and can realize movable sealing of the liquid storage cylinder 1, at least part of the structure of the liquid storage cylinder 1 extends into the corresponding second interface 22, the end of the liquid storage cylinder 1 extending into the corresponding second interface 22 is provided with a tetrafluoro sealing ring 15, specifically, the thin tube 12 extends into the corresponding second interface 22, the thin tube 12 is provided with the tetrafluoro sealing ring 15, the end of the liquid sealing rod 4 extending into the four-way joint 2 is provided with a liquid sealing tetrafluoro block 41, when the liquid sealing rod 4 seals the liquid storage cylinder 1, the liquid sealing tetrafluoro block 41 is matched and sealed with the tetrafluoro sealing ring 15 on the thin tube 12, and the tetrafluoro sealing ring 15 and the thin tube 12 extend into the liquid sealing tetrafluoro block 41, so as to ensure the sealing performance of the connection between the liquid sealing rod 4 and the liquid.
Preferably, the liquid sealing rod 4 is in threaded connection with the corresponding second interface 22, the liquid sealing rod 4 is provided with a second handle 42 positioned on the outer side of the four-way joint 2, and the liquid sealing rod 4 and the second interface 22 are in fit sealing with a tetrafluoro sealing gland 44 through a tetrafluoro sealing ring 43. In this embodiment, the liquid sealing rod 4 has a similar structure to the piston rod 32, and the second handle 42 is rotated to control the liquid sealing rod 4 to move linearly along the second interface 22, so as to achieve the effect of movably sealing the liquid storage cylinder 1, and the liquid sealing rod 4 is sealed with the second interface 22.
The embodiment of the invention also provides a pulse refrigerating system which comprises a refrigerator, a compressor and the device, wherein the refrigerator is communicated with one first interface 21 through the refrigerator connecting pipe 5, and the compressor is communicated with the other first interface 21 through the compressor connecting pipe 6. When the system of the embodiment works, the liquid storage cylinder 1 is filled with liquid to be filled, and redundant air is discharged through the liquid guide rod 11; after the liquid storage part is arranged on the four-way joint 2, the second handle is rotated to tightly press and seal the liquid sealing rod 4 and the liquid storage cylinder 1, so that liquid in the liquid storage cylinder 1 is prevented from leaking; after the device stores liquid, the compressor connecting pipe 6 is connected with the outlet of the compressor, the refrigerator connecting pipe 5 is connected with the inlet of the refrigerator, and the device is embedded into the system; the whole system of the pulse tube refrigerator starts to be vacuumized (the liquid in the liquid storage cylinder 12 cannot be leaked out under the action of the liquid sealing rod 4), helium is added into the system to 4MPa, and the system is started to operate; after the temperature curve of the cold head of the refrigerator is stable, the liquid sealing rod 4 is opened, the first handle 33 is started, and the piston rod 32 and the liquid guide rod 11 are driven to start to add liquid (half circle is 1mg, and circle is 2 mg). Therefore, the system provided by the implementation can realize milligram-level liquid filling, not only has high accuracy, but also is very convenient to operate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a liquid filling metering device, includes liquid storage cylinder and four-way connection, four-way connection have can be used to communicate two first interfaces of refrigerator and compressor respectively and with two second interfaces that first interface all communicates, the liquid storage cylinder with one of them second interface intercommunication, its characterized in that: still including stretching into drain rod in the liquid storage cylinder and order about the drain rod is followed the drive assembly that the liquid storage cylinder removed, the diameter of drain rod is the millimeter level, in another one the second kneck is installed and is stretched into the shutoff of four-way connection internalization the liquid sealing rod of liquid storage cylinder.
2. A liquid filling metering device according to claim 1, characterized in that: the liquid outlet department of liquid storage cylinder is provided with and has the capillary from the function of proclaiming oneself and can stretch into and correspond tubule in the second interface, the tubule intercommunication liquid storage cylinder and bore are less than the liquid storage cylinder.
3. A liquid filling metering device according to claim 1, characterized in that: the driving assembly comprises a piston cylinder and a piston rod extending into the piston cylinder, the piston rod is in threaded connection with the inner wall of the piston cylinder, the piston rod is fixedly connected with the liquid guide rod, and the piston rod and the liquid guide rod are located on the same straight line.
4. A liquid fill metering device as set forth in claim 3 wherein: the diameter of the liquid guide rod is 2mm, and the screw pitch of the piston rod is 0.635 mm.
5. A liquid fill metering device as set forth in claim 3 wherein: one end of the liquid guide rod extends into the liquid storage cylinder, and the other end of the liquid guide rod extends into the piston cylinder and is fixedly connected with the piston rod.
6. A liquid fill metering device as set forth in claim 3 wherein: one end of the piston rod is fixedly connected with the liquid guide rod, and the other end of the piston rod extends out of the piston cylinder and is provided with a first handle.
7. A liquid filling metering device according to claim 1, characterized in that: the liquid guide rod is axially sealed with the inner wall of the liquid storage cylinder through a tetrafluoro sealing ring, and the tetrafluoro sealing ring is radially compressed through a tetrafluoro sealing gland.
8. A liquid filling metering device according to claim 1, characterized in that: at least part of the liquid storage cylinder extends into the corresponding second interface, the end part of the liquid storage cylinder in the second interface is provided with a tetrafluoro sealing ring, the liquid sealing rod extends into the end part of the four-way joint in the four-way joint is provided with a liquid sealing tetrafluoro block which can be matched and sealed with the tetrafluoro sealing ring.
9. A liquid filling metering device according to claim 1, characterized in that: the liquid sealing rod is in threaded connection with the corresponding second interface, the liquid sealing rod is provided with a second handle located on the outer side of the four-way connector, and the liquid sealing rod is in matched sealing with the tetrafluoro sealing gland through a tetrafluoro sealing ring between the second interface.
10. A pulse refrigerating system comprises a refrigerator and a compressor, and is characterized in that: the liquid-filling metering device according to any one of claims 1 to 9, wherein said refrigerator is connected to one of said first ports of the liquid-filling metering device via a refrigerator connection, and said compressor is connected to the other of said first ports via a compressor connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810105093.2A CN108489570B (en) | 2018-02-02 | 2018-02-02 | Liquid filling metering device and pulse refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810105093.2A CN108489570B (en) | 2018-02-02 | 2018-02-02 | Liquid filling metering device and pulse refrigeration system |
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| Publication Number | Publication Date |
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| CN108489570A CN108489570A (en) | 2018-09-04 |
| CN108489570B true CN108489570B (en) | 2020-02-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09324958A (en) * | 1996-04-05 | 1997-12-16 | Iwatani Internatl Corp | Cryogenic temperature refrigerating machine |
| CN201482491U (en) * | 2009-07-21 | 2010-05-26 | 李凤巧 | Continuous metering suction unit for pipette |
| CN102730613A (en) * | 2012-06-28 | 2012-10-17 | 上海裕达实业公司 | Heat pipe working medium filling bench |
| CN204677530U (en) * | 2015-05-26 | 2015-09-30 | 张晓义 | Multistage hydraulic cylinder internal series-connection formula drawbench |
| CN206628556U (en) * | 2017-02-09 | 2017-11-10 | 江苏永达电源股份有限公司 | A kind of lead accumulator for carrying filling electrolytic solution device |
-
2018
- 2018-02-02 CN CN201810105093.2A patent/CN108489570B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09324958A (en) * | 1996-04-05 | 1997-12-16 | Iwatani Internatl Corp | Cryogenic temperature refrigerating machine |
| CN201482491U (en) * | 2009-07-21 | 2010-05-26 | 李凤巧 | Continuous metering suction unit for pipette |
| CN102730613A (en) * | 2012-06-28 | 2012-10-17 | 上海裕达实业公司 | Heat pipe working medium filling bench |
| CN204677530U (en) * | 2015-05-26 | 2015-09-30 | 张晓义 | Multistage hydraulic cylinder internal series-connection formula drawbench |
| CN206628556U (en) * | 2017-02-09 | 2017-11-10 | 江苏永达电源股份有限公司 | A kind of lead accumulator for carrying filling electrolytic solution device |
Non-Patent Citations (1)
| Title |
|---|
| 《1.6kg小型同轴脉冲管制冷机实验研究》;邢恩春等;《真空与低温》;20170828;第23卷(第4期);217-221 * |
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