CN107436106B - Liquid filling device and method for liquid metal high-temperature pulsating heat pipe - Google Patents
Liquid filling device and method for liquid metal high-temperature pulsating heat pipe Download PDFInfo
- Publication number
- CN107436106B CN107436106B CN201710819443.7A CN201710819443A CN107436106B CN 107436106 B CN107436106 B CN 107436106B CN 201710819443 A CN201710819443 A CN 201710819443A CN 107436106 B CN107436106 B CN 107436106B
- Authority
- CN
- China
- Prior art keywords
- liquid
- liquid metal
- heat pipe
- pipeline
- pulsating heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0283—Means for filling or sealing heat pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a liquid filling device and a liquid filling method of a liquid metal high-temperature pulsating heat pipe, wherein the liquid filling device comprises an inert gas cylinder, a glove box, a vacuumizing system, the liquid metal high-temperature pulsating heat pipe, a pulsating heat pipe heater and a liquid filling pipe, wherein the glove box is of a sealed box structure, two glove boxes which are connected in a sealing way are arranged on a front box body of the glove box, a gas circulation system, at least one weighing device, at least one liquid metal storage device, a multichannel connecting pipe, a vacuumizing pipeline, a liquid filling pipeline, at least one liquid pipeline switch and a vacuum valve are arranged in the glove box, and a first interface and a second interface are arranged on the box body of the glove box. The invention can achieve the purposes of accurate filling of the pulsating heat pipe, high purity of the filling working medium, safe filling process, safe treatment of residual working medium after filling, excellent performance of the pulsating heat pipe and the like.
Description
Technical Field
The invention relates to the field of processing of high-temperature pulsating heat pipes, in particular to a liquid filling device and method of a liquid metal high-temperature pulsating heat pipe.
Background
Pulsating heat pipe (0 HP) is a novel, efficient heat transfer element which is proposed by Akachi in the beginning of the 90 s of the 20 th century and can be used in tiny space and under the condition of high heat flux density. The pulsating heat pipe consists of bent capillary tube, and the inside of the tube is vacuumized and filled with proper amount of working medium. When in operation, the working medium absorbs heat at the heating end, expands and boosts pressure, and flows to the low-temperature heat-release end. There, the gas column cools and contracts, and the working medium oscillates and flows between the heating end and the heat release end due to the pressure difference between the two ends and the pressure imbalance between the adjacent pipes, so that heat transfer is realized. Pulsating heat pipes that operate at temperatures in excess of 500 c are known as high temperature pulsating heat pipes. The high-temperature pulsating heat pipe adopts liquid metal as working medium, and the liquid metal has good heat conducting capacity, heat stability and lower saturated vapor pressure, and has higher vaporization latent heat at high temperature. Because the sodium-potassium alloy has the characteristic of being liquid at normal temperature, the melting process can be omitted in the heating process, so that the heat pipe is simpler to start. Therefore, the sodium-potassium alloy is one of ideal working media of the liquid metal high-temperature pulsating heat pipe.
The sodium-potassium alloy is liquid at normal temperature, and is subjected to severe reaction with acid, carbon dioxide, moisture and water to release hydrogen, so that the sodium-potassium alloy is spontaneously combusted immediately, sometimes even explodes, and is extremely easy to oxidize in a weak oxygen environment, so that the protection of inert gas in the process is extremely important. Because the inner diameter of the pulsating heat pipe is smaller, the working medium is finally scattered into liquid plugs and air plugs which are randomly distributed and arranged at intervals in the capillary tube under the influence of surface tension, so that the filled inert gas is difficult to extract, the filling difficulty is greatly increased, and the filling requirements of the sodium-potassium alloy high-temperature pulsating heat pipe cannot be met by the existing filling methods of the pulsating heat pipe and the alkali metal high-temperature heat pipe.
The filling process of the liquid metal high-temperature pulsating heat pipe should ensure that: the filled liquid metal has higher purity; the pulsating heat pipe has high vacuum degree before filling; the amount of the sodium-potassium alloy filled can be accurately controlled; ensuring that inert gas does not exist in the high-temperature pulsating heat pipe after filling is finished; since the liquid metal is extremely reactive, the safety of the filling process is also to be ensured. The filling process of the liquid metal high-temperature pulsating heat pipe is the first, but in the filling process, the filling process of the alkali metal high-temperature heat pipe and the sodium-potassium alloy heat pipe can be referred to, and the filling process capable of providing reference has four steps:
(1) The method adopts a bypass structure, inert gas is replaced in a transparent chamber, the working medium is put into an inner cylinder, a filling pipe is sealed and vacuumized, the working medium is heated to be melted into liquid, the liquid working medium enters the high-temperature heat pipe under the impact of the inert gas, and the inert gas in the pipe is pumped out after the heat pipe returns to normal temperature. The vacuum glove box adopted by the method belongs to an open type, a small amount of working medium is oxidized in the split charging process, the work piece sealing coupling process is involved in the operation process, and the sealing of a pipeline is affected by improper operation.
(2) An oxidation-free sub-packaging method of alkali metal working media and integrated equipment (Qu Wei, ai Bangcheng, jijun, xue Zhihu, application number: 201210378002.5), compared with the method described in (1), the method has the advantages that the process tank is arranged on the lower side of a glove box, and the operation process is simplified. 4 air suction and exhaust pipes are adopted in the glove box, and the air suction of each pipe is not uniform enough for the two corner areas passing through; the built-in balance occupies most of the glove box, the wall structure of the process tank is complex, and the process tank is not easy to disassemble and assemble.
(3) The solid working medium filling equipment of the double-process interface heat pipe and the filling method (Qu Wei, ai Bangcheng, jijun, xue Zhihu, application number: 201410306757.3) have the same filling principle as in (2), adopt the design of the double-process interface, the main process interface is a vacuumizing interface and an inert gas passage interface, and is a working medium filling inlet, and the auxiliary process interface is a vacuumizing interface and an inert gas passage interface, so that the exhaust channel is doubled. The method has the advantages that the device is complex, working medium residues exist on the inner wall of the process tank, and the cleaning process after filling is complex.
(4) The filling process of the sodium-potassium alloy heat pipe is, for example, in the literature Wang Wei, sodium-potassium alloy medium-temperature heat pipe experimental research [ D ]. Beijing university of industry, 2012, the sodium-potassium alloy liquid filling method is introduced, the sodium-potassium alloy is filled into an alloy cylinder after being processed, the whole system is connected, and the heat pipe is filled under inert gas pressure after being vacuumized. The method has higher requirements on the installation process of the sodium-potassium alloy cylinder. By using the method to fill the sodium-potassium alloy high-temperature pulsating heat pipe, inert gas can not be pumped out of the pulsating heat pipe after filling is completed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a liquid filling device and method for a high-temperature pulsating heat pipe of liquid metal, so that the purposes of accurate filling of the pulsating heat pipe, high purity of a filling working medium, safe filling process, safe treatment of residual working medium after filling, excellent performance of the pulsating heat pipe and the like are achieved.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the liquid filling method of the liquid metal high-temperature pulsating heat pipe is characterized by comprising the following steps of:
s1: the glove box is used for sealing the liquid metal storage device, the weighing device, the vacuumizing pipeline, the liquid filling pipeline and the liquid pipeline;
s2: closing a liquid pipeline and a vacuumizing pipeline in the glove box, and circularly removing oxygen and water from the glove box to ensure that the water and oxygen content in the glove box is less than or equal to 0.1ppm;
s3: heating the liquid metal high-temperature pulsating heat pipe to a required temperature, and baking non-condensable gas adsorbed on the surface;
s4: purifying and configuring the required liquid metal in a glove box, and placing the configured liquid metal in a liquid metal storage device;
s5: connecting a liquid pipeline with the liquid metal storage device, and extending the liquid pipeline below the liquid level of the liquid metal storage device;
s6: solidifying the liquid metal in the liquid metal storage device connected with the liquid pipeline in the step S5;
s7: vacuumizing the liquid metal high-temperature pulsating heat pipe, the liquid filling pipeline and the liquid pipeline to ensure that the vacuum degree in the high-temperature pulsating heat pipe reaches 10 -3 Pa, and continuing for two hours, and closing the vacuumizing pipeline and the liquid pipeline after completion;
s8: melting liquid metal in the liquid metal storage device, enabling a liquid pipeline to be connected with the liquid metal storage device, enabling the liquid pipeline to extend below liquid of the liquid metal storage device, placing the liquid metal storage device on the weighing device, opening the liquid pipeline, sucking the liquid metal into the liquid metal high-temperature pulsating heat pipe due to pressure difference, and closing the liquid pipeline when the weighing device displays that the required mass of the liquid metal is reached;
s9: cutting off the liquid filling pipe at the upper end of the liquid filling liquid metal high-temperature pulsation heat pipe, and sealing the heat pipe by cold welding with inert gas protection;
s10: the liquid filling device of the liquid metal high-temperature pulsating heat pipe is safely treated.
Further, the working medium in the liquid metal high-temperature pulsating heat pipe is sodium-potassium alloy, wherein the mass fraction of potassium in the sodium-potassium alloy is 46% -89%, or metal sodium, or metal potassium, or metal cesium, or metal rubidium.
Further, in step S6, when the solidification point of the liquid metal is higher than room temperature, the liquid metal is solidified using liquid nitrogen.
The liquid filling device of the liquid metal high-temperature pulsating heat pipe is characterized by comprising an inert gas cylinder, a glove box, a vacuumizing system, the liquid metal high-temperature pulsating heat pipe, a pulsating heat pipe heater and a liquid filling pipe, wherein the glove box is of a sealed box structure, two gloves which are in sealed connection are arranged on a front box body of the glove box, a gas circulation system, at least one weighing device, at least one liquid metal storage device, a multichannel connecting pipe, a vacuumizing pipeline, a liquid filling pipeline, at least one liquid pipeline switch and a vacuum valve are arranged in the glove box, and a first interface and a second interface are arranged on the box body of the glove box;
in the glove box, the vacuumizing pipeline, the liquid filling pipeline and the at least one liquid pipeline are connected together through the multi-channel connecting pipe, the vacuumizing pipeline is further connected to the first connector, the liquid filling pipeline is further connected to the second connector, each liquid pipeline is connected to each liquid metal storage device, the liquid metal storage devices are used for containing liquid metal to be filled into the liquid metal high-temperature pulsating heat pipes, the weighing devices are arranged below each liquid metal storage device and used for weighing the mass of each liquid metal filled into the liquid metal high-temperature pulsating heat pipes, the vacuum valves are mounted on the vacuumizing pipeline, and the liquid pipeline switches are mounted on each liquid pipeline;
the inert gas cylinder is connected with the glove box in a sealing way;
the glove box is hermetically connected with the vacuumizing system through the first interface;
the glove box is in sealing connection with the liquid filling pipe through the second interface;
the liquid filling pipe is connected with the liquid metal high-temperature pulsating heat pipe;
the liquid metal high-temperature pulsating heat pipe is heated by the pulsating heat pipe heater.
Further, at least one vacuumizing pipeline is arranged between the vacuumizing system and the liquid metal high-temperature pulsating heat pipe outside the glove box.
Further, the working medium filled in the liquid metal high-temperature pulsating heat pipe is sodium-potassium alloy, wherein the mass fraction of potassium in the sodium-potassium alloy is 46% -89%, or metal sodium, or metal lithium, or metal cesium, or metal rubidium.
Further, the vacuumizing system comprises a vacuum gauge, a cold trap, a molecular pump unit and a cooling water bath, wherein the vacuum gauge, the cold trap and the molecular pump unit are sequentially connected, the cooling water bath is connected to the molecular pump unit, and the vacuum gauge is connected with the first interface in a sealing manner.
Further, the vacuumizing pipeline is hermetically connected with the first interface through a vacuum flange; the vacuumizing system is hermetically connected with the first interface through a vacuum flange; the liquid filling pipeline is in sealing connection with the second interface through a vacuum flange; the liquid filling pipe is connected with the second interface in a sealing way through a vacuum flange.
Further, the pulsating heat pipe heater is a groove type heating plate or a high frequency coil.
Further, the liquid metal high-temperature pulsating heat pipe is a tubular pulsating heat pipe or a plate type pulsating heat pipe.
According to the technical scheme, the liquid metal working medium is configured under the protection of inert gas through the closed glove box, so that the liquid metal is prevented from being polluted, the inert gas environment in the glove box is ensured, the pipeline system in the glove box is not required to be frequently disassembled for repeated filling in a short time, the error of the quality of the working medium in the filling process is eliminated as much as possible through the weighing device, the whole device is easy to disassemble and good in tightness through the connection of the pipeline and the equipment by adopting the vacuum flange, the pulsating heat pipe, the liquid pipeline and the liquid filling pipeline are vacuumized before filling, no gas impurity is ensured in the pulsating heat pipe before filling and after filling, the problem that the gas in the pulsating heat pipe cannot be extracted after filling cannot be ensured in the prior art is solved, the filling process is safer, and the high-temperature pulsating heat pipe of the liquid metal has better performance. Thus, the present invention has significant features.
Drawings
FIG. 1 is a schematic diagram of a liquid charging apparatus for a liquid metal high temperature pulsating heat pipe of the present invention;
FIG. 2 is a flow chart of a method for charging liquid of a liquid metal high temperature pulsating heat pipe of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
In the following detailed description of the embodiments of the present invention, the structures of the present invention are not drawn to a general scale, and the structures in the drawings are partially enlarged, deformed, and simplified, so that the present invention should not be construed as being limited thereto.
In the following embodiments of the present invention, referring to fig. 1, fig. 1 is a schematic structural diagram of a liquid filling device of a liquid metal high temperature pulsating heat pipe according to the present invention. As shown in fig. 1, a liquid filling device of a liquid metal high-temperature pulsating heat pipe comprises an inert gas cylinder 1, a glove box 2, a vacuumizing system 4, a liquid metal high-temperature pulsating heat pipe 5, a pulsating heat pipe heater 6 and a liquid filling pipe 3, wherein the glove box 2 is of a sealed box structure, two gloves 21 which are in sealed connection are arranged on a front box body of the glove box 2, a gas circulation system, at least one weighing device, at least one liquid metal storage device, a multichannel connecting pipe, a vacuumizing pipeline, a liquid filling pipeline, at least one liquid pipeline switch and a vacuum valve are arranged in the glove box 2, and a first interface 30 and a second interface 31 are arranged on the box body of the glove box.
The working medium filled in the liquid metal high-temperature pulsating heat pipe can be sodium-potassium alloy (the mass fraction of potassium is 46% -89%), or metal sodium, or metal potassium, or metal cesium, or metal rubidium.
Taking a sodium-potassium alloy working medium as an example, the sodium-potassium alloy is in a liquid state at normal temperature, and a process of melting solids into a liquid state is not needed, so that the liquid filling process is simpler. Referring to fig. 1, the glove box is further provided with a liquid nitrogen spray gun, a precision balance 24, a sodium-potassium alloy tank 23, a tee joint 27, a liquid pipeline 26, a liquid pipeline switch 25, a vacuumizing pipeline 28, a liquid filling pipeline 22 and a vacuum valve 29, and a first connector 30 and a second connector 31 are arranged on the box body of the glove box 2; tee 27 has three ports, port one 32, port two 33 and port three 34. The sodium-potassium alloy tank 23 is filled with the prepared sodium-potassium alloy liquid, the sodium-potassium alloy liquid is placed on the precision balance 24, one end of the liquid pipeline 26 extends below the liquid level of the sodium-potassium alloy liquid in the sodium-potassium alloy tank 23, the other end of the liquid pipeline is connected with the first port 32 of the tee joint 27 through a clamping sleeve, and the liquid pipeline switch 25 is arranged on the liquid pipeline 26; one end of the vacuumizing pipeline 28 is connected with the vacuum valve 29, the vacuum valve 29 is in sealing connection with the second port 33 of the tee joint 27 through a clamping sleeve, the other end of the vacuumizing pipeline 29 is in sealing connection with the first port 30 through a vacuum flange, the third port 34 of the tee joint 27 is connected with the liquid filling pipeline 22 through a clamping sleeve, and the liquid filling pipeline 22 is in sealing connection with the second port 31 through a vacuum flange; the inert gas cylinder 1 is connected with the glove box 2 in a sealing way; the glove box 2 is hermetically connected with the vacuumizing system 4 through a first interface 30; the glove box 2 is connected with the liquid filling pipe 3 through a second interface 31; the liquid filling pipe 3 is connected with a sodium-potassium alloy high-temperature pulsating heat pipe 5; the sodium-potassium alloy high-temperature pulsating heat pipe 5 is embedded in the pulsating heat pipe heater 6.
In this embodiment, the vacuumizing system 4 includes a vacuum gauge 41, a cold trap 42, a molecular pump unit 43, and a cooling water bath 44, where the cooling water bath 44 is connected to the molecular pump unit 43 to cool the molecular pump unit, and the vacuum gauge 41, the cold trap 42, and the molecular pump unit 43 are sequentially connected, and the vacuum gauge 41 is connected to the first interface 30 through a vacuum flange. Pouring enough liquid nitrogen into the cold trap 42, opening the molecular pump unit 43, and simultaneously opening the vacuum valve 29 in the glove box, namely vacuumizing the sodium-potassium alloy high-temperature pulsating heat pipe 5 through the second connecting pipe 28, the tee joint 27, the third connecting pipe 22 and the liquid filling pipe 3, observing vacuumizing conditions through the vacuum gauge 41, and cooling the water bath 44 to provide circulating cooling for the molecular pump unit 43. Other systems with vacuum pumping functions are within the scope of the present invention.
In order to further improve the vacuum degree in the high-temperature pulsating heat pipe, at least one vacuumizing pipeline can be additionally arranged between the vacuumizing system and the liquid metal high-temperature pulsating heat pipe outside the glove box. In this embodiment, an opening is added at the lower part or the side part of the liquid metal pulsating heat pipe, so that the molecular pump unit 43 is directly connected with the opening at the lower part or the side part of the high temperature pulsating heat pipe outside the glove box through a plurality of vacuumizing pipelines respectively, and vacuumizes the high temperature pulsating heat pipe directly.
Since alkali metal is an active metal, is extremely easily oxidized in oxygen and easily reacts with water to rapidly release heat, the glove box 2 should be a sealed structure and ensure that the filling operation is performed under anaerobic and anhydrous conditions. In order to increase the sealing effect, the vacuum pumping pipeline 28 and the first interface 30, the vacuum pumping pipeline 28 and the vacuum valve 29, the vacuum valve 29 and the tee joint 27, the liquid filling pipeline 22 and the second interface 31, the liquid filling pipe 3 and the second interface 31, the liquid filling pipeline 22 and the tee joint 27, and the vacuum pumping system 3 and the first interface 30 are all in sealing connection, preferably, the vacuum flange connection is adopted to prevent external gas from entering the glove box. As long as the sealing effect can meet the requirement, other structures with sealing effect can replace the vacuum flange, and the sealing structure belongs to the protection scope of the invention. In this embodiment, the liquid line 26 may be a hose, and the liquid line switch 25 may be a pressure type hose switch, and the communication and blocking of the hose are achieved by adjusting the pressure.
Preferably, the evacuation line 28 may be a bellows.
The pulsating heat pipe heater 6 is a sodium-potassium alloy high temperature pulsating heat pipe heating, which in this embodiment may be a grooved heating plate or a high frequency coil.
Preferably, the liquid metal high temperature pulsating heat pipe may be in the form of any heat pipe known in the art, such as a tubular pulsating heat pipe or a plate pulsating heat pipe.
Since the sodium-potassium alloy high-temperature pulsating heat pipes have different sizes, the elevator 7 can be additionally arranged below the sodium-potassium alloy high-temperature pulsating heat pipes, and the height of the sodium-potassium alloy high-temperature pulsating heat pipes 5 can be adjusted.
When the alkali metal working medium to be filled is sodium metal, cesium metal or rubidium metal, they are all solid at normal temperature, and a heating device is needed to melt them into liquid state for filling.
When two different working mediums need to be filled in turn, the tee joint 27 can be changed into a four-way or other multi-channel connecting pipe, the multi-channel connecting pipe is connected with a plurality of liquid pipelines, and each liquid pipeline is provided with a liquid pipeline switch so as to control each liquid pipeline independently. In order to accurately fill each working medium, a weighing device can be arranged below each working medium.
The method for filling liquid into the liquid metal high-temperature pulsating heat pipe by using the device mainly comprises the following steps with reference to fig. 1 and 2:
s1: the glove box encloses the liquid metal storage device 23, the weighing device 24, the evacuation line 28, the charging line 22 and the liquid line 26.
S2: and the liquid pipeline 26 and the vacuumizing pipeline 28 in the glove box are closed, and the oxygen and water are circularly removed from the glove box 2, so that the water and oxygen content in the glove box 2 is less than or equal to 0.1ppm, the operation in the glove box is ensured to be an anaerobic and anhydrous operation, and the liquid metal is prevented from being oxidized.
S3: heating the liquid metal high-temperature pulsating heat pipe 5 to a required temperature, and baking the non-condensable gas adsorbed on the surface.
S4: the desired liquid metal is purified and disposed in a glove box, and the disposed liquid metal is placed in a liquid metal storage device 23.
In the process, the purification and configuration processes are carried out under the protection of a glove box, so that the introduction of impurities by contact with air is avoided. The method for preparing the high-purity liquid metal comprises the following steps: the required solid alkali metal is respectively clamped from an alkali metal working medium tank filled with the alkali metal by using tweezers, the required solid alkali metal is wiped, the surface oxide skin on the surface of the metal is cut by using a knife, the cut metal is put into a beaker, the beaker is placed on a heater, the temperature is controlled to enable the alkali metal to be molten (the alkali metal is heated according to the melting points of different working mediums), after standing, the impurity film separated out from the surface of the liquid metal is picked out by using the tweezers, the standing is repeated once, and then the impurity film separated out from the surface of the liquid metal is picked out by using the tweezers, so that the high-purity liquid metal is obtained. In the process, the liquid metal is always isolated from the outside, and impurities are separated out through two standing processes, so that the obtained liquid metal has high purity.
S5: a liquid line 26 is connected to the liquid metal storage device 23 and extends below the liquid of the liquid metal storage device 23.
S6: solidifying step S5 the liquid metal in the liquid metal storage device 23 with the liquid line 26 connected thereto.
In this step, the purified liquid metal is solidified, turning it into a solid mass, closing the end of the liquid line 26. When the working medium is sodium-potassium alloy, the sodium-potassium alloy is liquid at normal temperature, and a liquid metal liquid level needs to be sprayed by a liquid nitrogen spray gun so as to solidify the liquid metal. When the working medium is sodium metal, potassium metal or solid at normal temperature, the purified liquid metal can be solidified into a block body after being placed at normal temperature.
S7: vacuumizing the liquid metal high-temperature pulsating heat pipe 5, the liquid filling pipeline 22 and the liquid pipeline 26 to ensure that the vacuum degree in the high-temperature pulsating heat pipe 5 reaches 10 -3 Pa for two hours, and after completion, the evacuation line 28 and the liquid line 26 are closed.
In this process, the end of the liquid pipe 26 is closed by the solidified liquid metal, and at this time, the pulsating heat pipe 5, the liquid filling pipe 22, the multi-channel connecting pipes and all the liquid pipes 26 are completely vacuumized, so that impurities in the pulsating heat pipe 5 do not need to be removed after liquid filling, the liquid filling process is simplified, and the safety of the liquid filling process is also ensured. The specific method comprises the following steps: pouring enough liquid nitrogen into the cold trap 42, opening a molecular pump unit 43, opening a vacuum valve 29, closing a liquid pipeline switch, and vacuumizing the liquid metal high-temperature pulsating heat pipe 5 through a vacuumizing pipeline 28, a tee joint 27, a liquid filling pipeline 22 and a liquid filling pipe 3 by a vacuumizing system to ensure that the vacuum degree in the heat pipe reaches 10 -3 Pa for two hours, after completion the vacuum valve 29 is closed. And then heating the alkali metal by a heater to melt the alkali metal into a liquid state, wherein the liquid alkali metal is sucked into the liquid metal high-temperature pulsating heat pipe in a vacuum state under the action of pressure difference, and no impurities are ensured.
S8: the liquid metal in the liquid metal storage device is melted, the liquid metal storage device 23 is placed on the weighing device 24, the liquid pipeline 26 is opened, the liquid metal is sucked into the liquid metal high-temperature pulsating heat pipe 5 due to pressure difference, and when the weighing device displays that the required liquid metal quality is achieved, the liquid pipeline 26 is closed, so that the accuracy of the filled liquid metal is ensured.
S9: and cutting off the liquid filling pipe 3 at the upper end of the liquid metal high-temperature pulsation heat pipe 5 after filling, and sealing the heat pipe by cold welding with inert gas protection.
S10: the liquid filling device of the liquid metal high-temperature pulsating heat pipe is safely treated.
This step may include cleaning and disposal of the glove box interior, pouring the remaining liquid metal into kerosene for sealing and storage, separately disassembling the liquid line 26, the liquid line 22, the tee 27, the vacuum valve 29, the liquid line switch 25 and cleaning with kerosene, isolating the glove box interior from the exterior with blind flange, and so forth. If the test is performed again in a short time, the vacuum valve 29 may be closed with a plug without being detached. After the internal treatment, wrapping the liquid filling pipe 3 below the glove box by using heat preservation cotton, pouring liquid nitrogen, and when the pipeline temperature is between minus 30 ℃ and minus 40 ℃, completely solidifying liquid metal in the pipe, disassembling the liquid filling pipe 3 and placing the liquid filling pipe in kerosene for cleaning. If liquid metal is melted during the disassembly and assembly process, the liquid metal should flow into the tray containing a sufficient amount of expanded graphite fire extinguishing agent.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The liquid filling method of the liquid metal high-temperature pulsating heat pipe is characterized by comprising the following steps of:
s1: the glove box is used for sealing the liquid metal storage device, the weighing device, the vacuumizing pipeline, the liquid filling pipeline and the liquid pipeline;
s2: closing a liquid pipeline and a vacuumizing pipeline in the glove box, and circularly removing oxygen and water from the glove box to ensure that the water and oxygen content in the glove box is less than or equal to 0.1ppm;
s3: heating the liquid metal high-temperature pulsating heat pipe to a required temperature, and baking non-condensable gas adsorbed on the surface;
s4: purifying and configuring the required liquid metal in a glove box, and placing the configured liquid metal in a liquid metal storage device;
s5: connecting a liquid pipeline with the liquid metal storage device, and extending the liquid pipeline below the liquid level of the liquid metal storage device;
s6: solidifying the liquid metal in the liquid metal storage device connected with the liquid pipeline in the step S5;
s7: vacuumizing the liquid metal high-temperature pulsating heat pipe, the liquid filling pipeline and the liquid pipeline to ensure that the vacuum degree in the high-temperature pulsating heat pipe reaches 10 -3 Pa, and continuing for two hours, and closing the vacuumizing pipeline and the liquid pipeline after completion;
s8: melting liquid metal in the liquid metal storage device, placing the liquid metal storage device on the weighing device, opening a liquid pipeline, sucking the liquid metal into the liquid metal high-temperature pulsating heat pipe due to pressure difference, and closing the liquid pipeline when the weighing device displays that the required mass of the liquid metal is reached;
s9: cutting off the liquid filling pipe at the upper end of the liquid filling liquid metal high-temperature pulsation heat pipe, and sealing the heat pipe by cold welding with inert gas protection;
s10: the liquid filling device of the liquid metal high-temperature pulsating heat pipe is safely treated.
2. The liquid filling method of the liquid metal high-temperature pulsating heat pipe according to claim 1, wherein working medium in the liquid metal high-temperature pulsating heat pipe is sodium-potassium alloy, and the mass fraction of potassium in the sodium-potassium alloy is 46% \89%, or metal sodium, or metal potassium, or metal cesium, or metal rubidium.
3. The method for filling a high-temperature pulsating heat pipe of liquid metal according to claim 1, wherein in step S6, liquid nitrogen is used to solidify the liquid metal when the solidification point of the liquid metal is higher than room temperature.
4. The liquid filling device of the liquid metal high-temperature pulsating heat pipe is characterized by comprising an inert gas cylinder, a glove box, a vacuumizing system, the liquid metal high-temperature pulsating heat pipe, a pulsating heat pipe heater and a liquid filling pipe, wherein the glove box is of a sealed box structure, two gloves which are in sealed connection are arranged on a front box body of the glove box, a gas circulation system, at least one weighing device, at least one liquid metal storage device, a multichannel connecting pipe, a vacuumizing pipeline, a liquid filling pipeline, at least one liquid pipeline switch and a vacuum valve are arranged in the glove box, and a first interface and a second interface are arranged on the box body of the glove box;
in the glove box, the vacuumizing pipeline, the liquid filling pipeline and the at least one liquid pipeline are connected together through the multi-channel connecting pipe, the vacuumizing pipeline is further connected to the first connector, the liquid filling pipeline is further connected to the second connector, each liquid pipeline is connected to each liquid metal storage device, the liquid metal storage devices are used for containing liquid metal to be filled into the liquid metal high-temperature pulsating heat pipes, the weighing devices are arranged below each liquid metal storage device and used for weighing the mass of each liquid metal filled into the liquid metal high-temperature pulsating heat pipes, the vacuum valves are mounted on the vacuumizing pipeline, and the liquid pipeline switches are mounted on each liquid pipeline;
the inert gas cylinder is connected with the glove box in a sealing way;
the glove box is hermetically connected with the vacuumizing system through the first interface;
the glove box is in sealing connection with the liquid filling pipe through the second interface;
the liquid filling pipe is connected with the liquid metal high-temperature pulsating heat pipe;
the liquid metal high-temperature pulsating heat pipe is heated by the pulsating heat pipe heater.
5. The liquid charging device of claim 4, wherein at least one vacuumizing pipeline is arranged between the vacuumizing system and the liquid metal high-temperature pulsating heat pipe outside the glove box.
6. The liquid filling device of the liquid metal high-temperature pulsating heat pipe according to claim 4, wherein the working medium filled in the liquid metal high-temperature pulsating heat pipe is sodium-potassium alloy, and the mass fraction of potassium in the sodium-potassium alloy is 46% -89%, or metallic sodium, or metallic potassium, or metallic cesium, or metallic rubidium.
7. The liquid filling device of the liquid metal high-temperature pulsating heat pipe according to claim 4, wherein the vacuumizing system comprises a vacuum gauge, a cold trap, a molecular pump unit and a cooling water bath, the vacuum gauge, the cold trap and the molecular pump unit are sequentially connected, the cooling water bath is connected to the molecular pump unit, and the vacuum gauge is connected with the first interface in a sealing manner.
8. The liquid charging device of claim 4, wherein the vacuum pumping pipeline is in sealing connection with the first interface through a vacuum flange; the vacuumizing system is hermetically connected with the first interface through a vacuum flange; the liquid filling pipeline is in sealing connection with the second interface through a vacuum flange; the liquid filling pipe is connected with the second interface in a sealing way through a vacuum flange.
9. The liquid charging apparatus of claim 4, wherein the pulsating heat pipe heater is a grooved heating plate or a high frequency coil.
10. The liquid charging apparatus of claim 4, wherein the liquid metal high temperature pulsating heat pipe is a tubular pulsating heat pipe or a plate pulsating heat pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819443.7A CN107436106B (en) | 2017-09-12 | 2017-09-12 | Liquid filling device and method for liquid metal high-temperature pulsating heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819443.7A CN107436106B (en) | 2017-09-12 | 2017-09-12 | Liquid filling device and method for liquid metal high-temperature pulsating heat pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107436106A CN107436106A (en) | 2017-12-05 |
| CN107436106B true CN107436106B (en) | 2023-05-05 |
Family
ID=60462087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710819443.7A Active CN107436106B (en) | 2017-09-12 | 2017-09-12 | Liquid filling device and method for liquid metal high-temperature pulsating heat pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107436106B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801895B (en) * | 2018-08-02 | 2021-04-30 | 华北水利水电大学 | Liquid metal loop is glove box for corrosion experiments |
| CN109269329B (en) * | 2018-09-08 | 2020-08-11 | 吴联凯 | Inclined tube type sodium heat pipe manufacturing device and method |
| CN109237974A (en) * | 2018-09-08 | 2019-01-18 | 吴联凯 | A kind of branch pipe type sodium heat pipe producing device and production method |
| CN109269710B (en) * | 2018-10-31 | 2020-07-21 | 北京建筑大学 | Pressure monitoring system and method for pulsating heat pipe |
| CN110243212B (en) * | 2019-05-31 | 2020-05-15 | 西安交通大学 | High-temperature alkali metal heat pipe hot-state filling loop system and method |
| CN110411253B (en) * | 2019-07-11 | 2020-10-09 | 桂林电子科技大学 | High-temperature heat pipe working medium filling device and method |
| WO2021031699A1 (en) * | 2019-08-20 | 2021-02-25 | 大连海事大学 | Liquid metal high-temperature pulsating heat pipe and testing method |
| CN110470161B (en) * | 2019-08-20 | 2021-01-15 | 大连海事大学 | Liquid metal high-temperature pulsating heat pipe and test method |
| CN110949715B (en) * | 2019-12-21 | 2020-11-17 | 西安交通大学 | High-precision quantitative filling device and method for liquid sodium metal |
| CN111486729B (en) * | 2020-04-23 | 2021-04-27 | 西安交通大学 | High-temperature alkali metal heat pipe cold filling system and method |
| CN114396817B (en) * | 2022-01-07 | 2023-08-15 | 西安交通大学 | Liquid metal heat pipe packaging device and method |
| CN114354881A (en) * | 2022-01-10 | 2022-04-15 | 中国原子能科学研究院 | System and method for measuring carbon/oxygen in alkali metal and method for replacing sensor |
| CN114700355B (en) * | 2022-03-08 | 2023-02-28 | 大连海事大学 | Device and method for destroying liquid metal high-temperature pulsating heat pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203203445U (en) * | 2013-03-12 | 2013-09-18 | 北京建筑工程学院 | Three-dimensional multi-path plate type pulsating heat pipe |
| CN104075600A (en) * | 2014-06-30 | 2014-10-01 | 中国航天空气动力技术研究院 | Device and method for filling dual process interface heat pipe with solid working mediums |
| CN105115328A (en) * | 2015-08-10 | 2015-12-02 | 中国航天空气动力技术研究院 | Filling method for low-melting-point alkali metal working mediums |
| CN106767056A (en) * | 2016-11-22 | 2017-05-31 | 江苏大学 | A kind of micro heat pipe vacuum pumping and filling device and method |
| CN207335505U (en) * | 2017-09-12 | 2018-05-08 | 大连海事大学 | A kind of charging device of liquid metal high temperature pulsating heat pipe |
| CN109269329A (en) * | 2018-09-08 | 2019-01-25 | 吴联凯 | A kind of inclined tube-type sodium heat pipe producing device and production method |
-
2017
- 2017-09-12 CN CN201710819443.7A patent/CN107436106B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203203445U (en) * | 2013-03-12 | 2013-09-18 | 北京建筑工程学院 | Three-dimensional multi-path plate type pulsating heat pipe |
| CN104075600A (en) * | 2014-06-30 | 2014-10-01 | 中国航天空气动力技术研究院 | Device and method for filling dual process interface heat pipe with solid working mediums |
| CN105115328A (en) * | 2015-08-10 | 2015-12-02 | 中国航天空气动力技术研究院 | Filling method for low-melting-point alkali metal working mediums |
| CN106767056A (en) * | 2016-11-22 | 2017-05-31 | 江苏大学 | A kind of micro heat pipe vacuum pumping and filling device and method |
| CN207335505U (en) * | 2017-09-12 | 2018-05-08 | 大连海事大学 | A kind of charging device of liquid metal high temperature pulsating heat pipe |
| CN109269329A (en) * | 2018-09-08 | 2019-01-25 | 吴联凯 | A kind of inclined tube-type sodium heat pipe producing device and production method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107436106A (en) | 2017-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107436106B (en) | Liquid filling device and method for liquid metal high-temperature pulsating heat pipe | |
| CN207335505U (en) | A kind of charging device of liquid metal high temperature pulsating heat pipe | |
| CN103644450B (en) | A kind of liquid hydrogen warm area high pressure heat exchange helium storage tank | |
| CN103372559A (en) | Cleaning method for furnace tube | |
| CN105937486B (en) | Cryogenic pump system, low temperature apparatus for controlling pump and cryopump regeneration method | |
| CN111302299B (en) | Welding sealing system and welding sealing process | |
| CN110411253B (en) | High-temperature heat pipe working medium filling device and method | |
| JP4560635B2 (en) | Sericin separation and recovery equipment | |
| CN100999776A (en) | Vacuum dual-chamber high temp, quenching furnace | |
| CN104548158A (en) | High-temperature and low-temperature sterilization cabinet | |
| JP3151460B2 (en) | Gas recovery and filling equipment | |
| CN210387882U (en) | Vacuum air pumping system | |
| CN109269329B (en) | Inclined tube type sodium heat pipe manufacturing device and method | |
| US8650755B2 (en) | Method and equipment of making a length of heat conduction pipe in a vacuum environment from a semi-finished heat conduction pipe | |
| CN113061988A (en) | Silicon core preparation method and silicon core preparation equipment | |
| RU1804774C (en) | Method for sealing the dewar flask | |
| CN207095078U (en) | A kind of CO2 gas refrigerations device | |
| CN215251330U (en) | Silicon core preparation equipment | |
| CN215491015U (en) | Alloy vacuum melting experimental device | |
| CN114870419B (en) | Method for improving cleaning efficiency of phosphoric acid flash chamber | |
| CN104030289A (en) | Graphite part purifying device | |
| CN209759643U (en) | Quartz boat surface treatment furnace | |
| CN212293539U (en) | Special recovery device for umbilical cord blood hematopoietic stem cells | |
| CN106512640A (en) | Purification device | |
| CN209983410U (en) | Semen cryopreservation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |