CN112378283B - Cylindrical high-temperature quartz heat pipe wire mesh capillary core fixing device and method - Google Patents
Cylindrical high-temperature quartz heat pipe wire mesh capillary core fixing device and method Download PDFInfo
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- CN112378283B CN112378283B CN202011109680.2A CN202011109680A CN112378283B CN 112378283 B CN112378283 B CN 112378283B CN 202011109680 A CN202011109680 A CN 202011109680A CN 112378283 B CN112378283 B CN 112378283B
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- 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
- F28D15/04—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 with tubes having a capillary structure
- F28D15/046—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 with tubes having a capillary structure characterised by the material or the construction of the capillary structure
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Abstract
The invention discloses a cylindrical high-temperature quartz heat pipe wire mesh capillary core fixing device and a method, the device comprises a quartz heat pipe, a wire mesh capillary core, graphite balls, rolling shafts, a rotary sealing element and an inert gas pipeline, wherein the wire mesh capillary core is arranged in the quartz heat pipe, the graphite balls are placed in the quartz heat pipe, at least three rolling shafts for providing rotary power and supporting action for the quartz heat pipe are arranged on the outer wall side of the quartz heat pipe, the first end of the rotary sealing element is connected with the quartz heat pipe, and the second end of the rotary sealing element is connected with the inert gas pipeline. The invention utilizes the centrifugal force of the rotation of the quartz heat pipe and the rolling action of the graphite balls to inlay the silk screen capillary core and the inner wall of the quartz heat pipe together at high temperature, when the heat pipe runs at high temperature, the silk screen capillary core cannot fall off, no gap can be formed between the capillary core and the inner wall of the quartz heat pipe, meanwhile, the roller can prevent the quartz heat pipe from softening and expanding outwards under the condition of inert gas with certain internal pressure at high temperature, and the outer diameter of the quartz heat pipe can be kept unchanged well.
Description
Technical Field
The invention belongs to the technical field of heat pipes, and particularly relates to a device and a method for fixing a wire mesh capillary core of a cylindrical high-temperature quartz heat pipe.
Background
The high-temperature heat pipe is one kind of heat pipe, and has the advantages of high working temperature, strong heat transfer capacity, low cost, long transmission distance and the like. The high-temperature heat pipe generally takes alkali metals such as potassium, sodium and lithium as working media, the operating temperature is over 500 ℃, and the operating temperature of the ultra-high temperature heat pipe is more than 1500 ℃, so that the shell of the high-temperature heat pipe is generally made of high-temperature resistant metal materials such as stainless steel, high-temperature alloy, molybdenum and the like, and the materials have sufficient temperature resistance and mechanical properties. However, these materials are not transparent materials, and cannot be used for studying related properties by a visualization method like a normal temperature heat pipe, for example, the inside of a high temperature heat pipe is solid-gas-liquid three-phase flow, which is more complex than the gas-liquid two-phase flow of a normal temperature heat pipe, and the current research on related theories is very little. Therefore, the visual research of the high-temperature heat pipe plays an important role in the development of the high-temperature heat pipe theory, the transparent material is very little at high temperature, the material with better known performance is high-purity quartz glass at present, the high-purity quartz glass is silicon dioxide with the purity of more than 99.99 percent, the structure is very stable, the softening temperature is 1730 ℃, the specific melting point is absent, and the hot-working performance is excellent, so that the visual material is very suitable for being used as the visual material of the high-temperature heat pipe.
However, the disclosed quartz heat pipe is very limited, and the temperature equalization gravity assisted heat pipe disclosed in the presently disclosed quartz heat pipe, such as the adaptive visualization heat pipe disclosed in CN105698410A, realizes visualization, but cannot be directly coupled with a capillary wick of a metal material because the quartz glass is a non-metal material. The common high-temperature heat pipe capillary comprises a channel, a silk screen and sintered powder, wherein the channel structure can be directly prepared on a heat pipe shell, the sintered powder capillary can be sintered to have the same size with the inner diameter of the heat pipe according to the shape of the heat pipe, only the silk screen capillary is formed by overlapping multiple layers of silk screens due to the soft structure of the silk screen capillary, the silk screens and the inner wall of the heat pipe cannot be really attached tightly, once gaps exist, the performance of the heat pipe can be influenced, and therefore, the silk screen capillary core cannot be fixed with a quartz glass pipe shell, and the research difficulty of the cored quartz heat pipe is one of the difficulties.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a device and a method for fixing a capillary wick of a silk screen of a cylindrical high temperature quartz heat pipe, which can effectively solve the problem that the silk screen cannot be attached to a quartz glass shell.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a cylindrical high temperature quartz heat pipe silk screen wick fixing device, includes quartz heat pipe, silk screen wick, graphite nodule, roller bearing, rotary seal and inert gas pipeline, and the silk screen wick is inside quartz heat pipe, and the graphite nodule is placed in quartz heat pipe, sets up at least three roller bearings that are used for providing rotary power and supporting role for quartz heat pipe in the outer wall side of quartz heat pipe, and the quartz heat pipe is connected to rotary seal's first end, and the inert gas pipeline is connected to the second end.
Preferably, a heat source, such as a torch, is disposed below the quartz heat pipe.
Preferably, the two adjacent rollers and the central axis of the quartz heat pipe form an included angle of 60-120 degrees.
Specifically, the roller is made of high-temperature resistant material, such as graphite.
Preferably, the roller is of spherical or cylindrical configuration.
Preferably, the inert gas pipeline comprises an oxygen device and an inert gas device, and the oxygen tank device and the inert gas device are connected through a three-way pipeline and are respectively controlled by a valve.
Specifically, the gas in the inert gas device may be argon, helium, or the like.
Preferably, the first end of the rotary sealing member is connected with a filling port of the quartz heat pipe, and the diameter of the graphite ball is 1/10-2/3 times of the inner diameter of the filling port.
Preferably, the quartz heat pipe is made of high-purity transparent quartz glass.
A method for fixing a wire mesh capillary core of a cylindrical high-temperature quartz heat pipe comprises the following steps:
step (1), starting a roller to rotate, wherein the roller drives a quartz heat pipe to rotate together because the roller is contacted with the outer wall of the quartz heat pipe, and the rotating speed of the quartz heat pipe is controlled to be 10-1000 rpm;
opening a valve of an inert gas device, introducing excessive inert gas into the quartz heat pipe, and keeping the internal pressure of the quartz heat pipe to be higher than the external atmospheric pressure;
step (3), opening a heat source, heating the quartz heat pipe, and controlling the heating temperature within +/-20% of the softening point of quartz glass of the quartz heat pipe and the melting point of the silk screen capillary core material;
step (4), simultaneously moving the heat source and the roller along the axial direction of the quartz heat pipe, wherein the moving speed is 5-1000mm/min, the moving range is consistent with the axial length of the wire mesh capillary core, and the heat source and the roller move back and forth along the axial direction of the quartz heat pipe more than or equal to 1 time;
step (5), closing the heat source, closing the roller, closing a valve of the inert gas device, and taking out graphite nodules in the quartz heat pipe after the quartz heat pipe is cooled;
step (6), turning on the heat source again, controlling the temperature below 1050 ℃, simultaneously turning on the rolling shaft, driving the quartz heat pipe to rotate, and controlling the rotating speed the same as that in the step (1);
step (7), opening a valve of an oxygen device, and introducing a small amount of oxygen into the quartz heat pipe, wherein at the moment, the graphite remaining on the wire mesh capillary core reacts with the oxygen and is discharged after being converted into a dioxide gas, so that impurities such as graphite are prevented from remaining in the quartz heat pipe;
and (8) closing all the devices, taking out the quartz heat pipe, putting the quartz heat pipe into hydrofluoric acid with the concentration of 5% -10% for cleaning, and removing the oxide layers on the inner wall of the quartz heat pipe and the surface of the wire mesh capillary core.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) according to the fixing device and method for the silk screen capillary core of the cylindrical high-temperature quartz heat pipe, the centrifugal force of the rotation of the quartz heat pipe and the rolling action of the graphite balls are utilized, the silk screen capillary core and the inner wall of the quartz heat pipe are embedded together at high temperature, and the silk screen capillary core cannot fall off when the heat pipe runs at high temperature.
(2) The device and the method for fixing the capillary core of the silk screen of the cylindrical high-temperature quartz heat pipe can ensure that no gap exists between the capillary core and the inner wall of the quartz heat pipe.
(3) According to the device and the method for fixing the wire mesh capillary core of the cylindrical high-temperature quartz heat pipe, the graphite roller can prevent the quartz heat pipe from softening and expanding outwards under the condition of inert gas with certain internal pressure at high temperature, and the outer diameter of the quartz heat pipe can be well kept unchanged.
(4) The device and the method for fixing the wire mesh capillary core of the cylindrical high-temperature quartz heat pipe have the advantages of simple structure and convenience in operation, so that the device and the method have wider applicability.
Drawings
Fig. 1 is a schematic diagram of a fixing device and method for a wire mesh wick of a cylindrical high-temperature quartz heat pipe according to the present invention.
Fig. 2 is a cross-sectional view of a cylindrical high-temperature quartz heat pipe wire mesh wick fixing device and method of the present invention.
Wherein the reference numerals explain: the device comprises a quartz heat pipe 1, a wire mesh capillary wick 2, graphite balls 3, a graphite roller 4, a blast burner 5, a rotary sealing element 6, a first valve 7, a second valve 8, an oxygen tank 9, an inert gas tank 10, a filling opening 11 and an inert gas pipeline 12.
Detailed Description
In order to clearly understand the technical spirit and the advantages of the present invention, the applicant makes the following detailed description by way of examples, but the description of the examples is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.
Referring to fig. 1 and 2, a cylindrical high-temperature quartz heat pipe wire mesh wick fixing device includes a quartz heat pipe 1, a wire mesh wick 2, graphite balls 3, three graphite rollers 4, a burner 5, a rotary sealing member 6, and an inert gas pipeline 12, wherein the wire mesh wick 2 is attached to an inner wall of the quartz heat pipe 1, the graphite balls 3 are disposed on the wire mesh wick 2, the graphite rollers 4 are attached to an outer wall of the cylindrical quartz heat pipe 1, the number of the graphite rollers 4 is three, the graphite rollers 4 are cylindrical or spherical, the graphite rollers 4 can move and rotate along the outer wall of the quartz heat pipe 1, and are used for providing rotary power and supporting the quartz heat pipe 1, when the cylindrical quartz heat pipe 1 is disposed, an included angle of 60-120 degrees is formed between each two adjacent graphite rollers and a central axis of the quartz heat pipe 1, and the included angle can ensure that the graphite rollers 4 can support the quartz heat pipe 1, if the included angle is too large, the quartz heat pipe 1 may fall off during rotation; the blowtorch 5 is arranged below the quartz heat pipe 1; the first end of the rotary sealing member 6 is connected with a filling port 11 of the quartz heat pipe 1, and the second end is connected with an inert gas pipeline 12.
In a preferred embodiment of the present invention, the inert gas line 12 comprises an oxygen tank 9 and an inert gas tank 10, the oxygen tank 9 and the inert gas tank 10 are connected by a three-way line, the oxygen tank 9 is controlled by the second valve 8, and the inert gas tank 10 is controlled by the first valve 7.
In a more preferred embodiment of the present invention, the gas in the inert gas tank 10 may be argon, helium, or the like.
In a preferred embodiment of the present invention, the torch 5 may be heated by oxyhydrogen flame, or by combustion of acetylene and oxygen, or by plasma beam, laser, electromagnetic induction, or resistance wire.
In a preferred embodiment of the present invention, the diameter of the graphite nodules 3 is between 1/10 and 2/3 times the inner diameter of the filling opening 11 of the quartz heat pipe 1.
In a preferred embodiment of the present invention, the quartz heat pipe 1 is made of a transparent quartz glass material with high purity.
In a preferred embodiment of the present invention, the number of graphite nodules is not particularly limited, and may be several, ten or several tens.
The method for fixing the wire mesh capillary core of the cylindrical high-temperature quartz heat pipe based on the device comprises the following steps:
step (1), starting a graphite roller 4 to rotate under the action of a motor, wherein the graphite roller 4 is in contact with the outer wall of a quartz heat pipe 1, so that the graphite roller 4 can drive the quartz heat pipe 1 to rotate together, and the rotating speed of the quartz heat pipe 1 is controlled to be 10-1000 rpm;
step (2), opening a first valve 7, introducing excessive inert gas into the quartz heat pipe 1 through an inert gas tank 10, and keeping the internal pressure of the quartz heat pipe 1 to be higher than the external atmospheric pressure;
step (3), turning on a blast burner 5, and heating the quartz heat pipe 1, wherein the heating temperature is controlled within +/-20% of the softening point of quartz glass and the melting point of the material of the wire mesh capillary core 2;
step (4), simultaneously moving the blowtorch 5 and the graphite roller 4 along the axial direction of the quartz heat pipe 1, wherein the moving speed is 5-1000mm/min, the moving range is consistent with the axial length of the silk screen capillary wick 2, the blowtorch 5 and the graphite roller 4 move back and forth along the axial direction of the quartz heat pipe 1 for more than or equal to 1 time, and the graphite roller 4 can move manually or can move under the control of a lead screw;
step (5), turning off the blowtorch 5, turning off the graphite roller 4, turning off the first valve 7, and taking out the graphite nodules 3 in the quartz heat pipe 1 after the quartz heat pipe 1 is cooled;
step (6), turning on the blowtorch 5 again, controlling the temperature below 1050 ℃, simultaneously turning on the graphite roller 4, driving the quartz heat pipe 1 to rotate, and controlling the rotating speed to be the same as that in the step (1);
step (7), opening a second valve 8, introducing a small amount of oxygen into the quartz heat pipe 1 through an oxygen tank 9, reacting the graphite remained on the wire mesh capillary core 2 with the oxygen at a certain temperature, converting the graphite into carbon dioxide gas, and discharging the carbon dioxide gas, so that impurities such as graphite can be removed and remained in the quartz heat pipe 1;
and (8) closing all the devices, taking out the quartz heat pipe 1, putting the quartz heat pipe 1 into hydrofluoric acid with the concentration of 5% -10% for cleaning, and removing oxide layers on the inner wall of the quartz heat pipe 1 and the surface of the wire mesh capillary wick 2.
Claims (10)
1. The device is characterized by comprising a quartz heat pipe, a wire mesh capillary core, a graphite ball, rollers, a rotary sealing element and an inert gas pipeline, wherein the wire mesh capillary core is arranged inside the quartz heat pipe and tightly attached to the inner wall of the quartz heat pipe, the graphite ball is placed on the wire mesh capillary core, at least three rollers for providing rotary power and supporting action for the quartz heat pipe are arranged on the outer wall side of the quartz heat pipe, the first end of the rotary sealing element is connected with the quartz heat pipe, the second end of the rotary sealing element is connected with the inert gas pipeline, and a heat source is arranged below the quartz heat pipe.
2. The fixture of claim 1, wherein the heat source is a torch.
3. The fixture of claim 1, wherein two adjacent rollers are disposed at an angle of 60-120 ° to a central axis of the quartz heat pipe.
4. The fixture of claim 1, wherein the roller is spherical or cylindrical in configuration.
5. A mounting apparatus in accordance with claim 1 or 4, wherein the roller is made of a refractory material.
6. The fixture of claim 5, wherein the roller is graphite.
7. The fixture apparatus of claim 1, wherein the inert gas line comprises an oxygen device and an inert gas device, and the oxygen tank device and the inert gas device are connected by a three-way line and are controlled by valves, respectively.
8. The fixture of claim 1, wherein the first end of the rotary seal is connected to a fill port of the quartz heat pipe, and the graphite nodules have a diameter between 1/10 and 2/3 times an inner diameter of the fill port.
9. The fixture of claim 1, wherein the quartz heat pipe is made of a high-purity transparent quartz glass material.
10. A method for fixing a capillary wick of a screen of a cylindrical high-temperature quartz heat pipe based on the fixing device as claimed in any one of claims 1 to 9, comprising the steps of:
step (1), starting a roller to rotate, and controlling the rotating speed of a quartz heat pipe to be 10-1000 revolutions per minute;
opening a valve of an inert gas device, introducing excessive inert gas into the quartz heat pipe, and keeping the internal pressure of the quartz heat pipe to be higher than the external atmospheric pressure;
step (3), opening a heat source, heating the quartz heat pipe, and controlling the heating temperature within +/-20% of the softening point of quartz glass of the quartz heat pipe and the melting point of the silk screen capillary core material;
step (4), simultaneously moving the heat source and the roller along the axial direction of the quartz heat pipe, wherein the moving speed is 5-1000mm/min, the moving range is consistent with the axial length of the wire mesh capillary core, and the heat source and the roller move back and forth along the axial direction of the quartz heat pipe more than or equal to 1 time;
step (5), closing the heat source, closing the roller, closing a valve of the inert gas device, and taking out graphite nodules in the quartz heat pipe after the quartz heat pipe is cooled;
step (6), turning on the heat source again, controlling the temperature below 1050 ℃, simultaneously turning on the rolling shaft, driving the quartz heat pipe to rotate, and controlling the rotating speed the same as that in the step (1);
opening a valve of an oxygen device, introducing a small amount of oxygen into the quartz heat pipe, and discharging after the graphite remaining on the wire mesh capillary core reacts with the oxygen and is converted into a dioxide gas;
and (8) closing the device, taking out the quartz heat pipe, putting the quartz heat pipe into hydrofluoric acid with the concentration of 5% -10% for cleaning, and removing the oxide layer on the inner wall of the quartz heat pipe and the surface of the wire mesh capillary core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011109680.2A CN112378283B (en) | 2020-10-16 | 2020-10-16 | Cylindrical high-temperature quartz heat pipe wire mesh capillary core fixing device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011109680.2A CN112378283B (en) | 2020-10-16 | 2020-10-16 | Cylindrical high-temperature quartz heat pipe wire mesh capillary core fixing device and method |
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| CN112378283A CN112378283A (en) | 2021-02-19 |
| CN112378283B true CN112378283B (en) | 2022-02-11 |
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| TW200721881A (en) * | 2005-11-29 | 2007-06-01 | Vertex Prec Electronics Inc | Novel structure of quartz heat pipe |
| CN201203284Y (en) * | 2008-03-28 | 2009-03-04 | 湖北华扬太阳能有限公司 | Hot pipe type solar full glass vacuum thermal-collecting tube built-in with wire net structure |
| CN105258543A (en) * | 2014-06-06 | 2016-01-20 | 奇鋐科技股份有限公司 | Crosswise-woven capillary structure and heat pipe structure with same |
| TW201638547A (en) * | 2015-04-16 | 2016-11-01 | 索士亞科技股份有限公司 | Phase change type heat sink and manufacturing method thereof |
| CN205897915U (en) * | 2016-07-18 | 2017-01-18 | 华南理工大学 | Ultra -thin heat pipe is used in cell -phone heat dissipation |
| CN210165802U (en) * | 2019-02-22 | 2020-03-20 | 天津农学院 | Visual gravity assisted heat pipe experimental research device with evaporation section provided with built-in pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7168480B2 (en) * | 2004-04-29 | 2007-01-30 | Los Alamos National Security, Llc | Off-axis cooling of rotating devices using a crank-shaped heat pipe |
-
2020
- 2020-10-16 CN CN202011109680.2A patent/CN112378283B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08166012A (en) * | 1994-12-14 | 1996-06-25 | Fujikura Ltd | Heat pipe type heating roller |
| TW200636202A (en) * | 2005-04-15 | 2006-10-16 | Hon Hai Prec Ind Co Ltd | Heat pipe and methode of making the same |
| TW200721881A (en) * | 2005-11-29 | 2007-06-01 | Vertex Prec Electronics Inc | Novel structure of quartz heat pipe |
| CN201203284Y (en) * | 2008-03-28 | 2009-03-04 | 湖北华扬太阳能有限公司 | Hot pipe type solar full glass vacuum thermal-collecting tube built-in with wire net structure |
| CN105258543A (en) * | 2014-06-06 | 2016-01-20 | 奇鋐科技股份有限公司 | Crosswise-woven capillary structure and heat pipe structure with same |
| TW201638547A (en) * | 2015-04-16 | 2016-11-01 | 索士亞科技股份有限公司 | Phase change type heat sink and manufacturing method thereof |
| CN205897915U (en) * | 2016-07-18 | 2017-01-18 | 华南理工大学 | Ultra -thin heat pipe is used in cell -phone heat dissipation |
| CN210165802U (en) * | 2019-02-22 | 2020-03-20 | 天津农学院 | Visual gravity assisted heat pipe experimental research device with evaporation section provided with built-in pipe |
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| CN112378283A (en) | 2021-02-19 |
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