CN203642759U - Combined outer structure heat pipe used for vertical heat pipe condenser - Google Patents

Combined outer structure heat pipe used for vertical heat pipe condenser Download PDF

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Publication number
CN203642759U
CN203642759U CN201320825298.0U CN201320825298U CN203642759U CN 203642759 U CN203642759 U CN 203642759U CN 201320825298 U CN201320825298 U CN 201320825298U CN 203642759 U CN203642759 U CN 203642759U
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China
Prior art keywords
heat pipe
end cover
condenser
external structure
compound external
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Expired - Fee Related
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CN201320825298.0U
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Chinese (zh)
Inventor
李斌
汤勇
张仕伟
韩晓东
陆龙生
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South China University of Technology SCUT
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South China University of Technology SCUT
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Abstract

The utility model relates to a combined outer structure heat pipe used for a vertical heat pipe condenser. The heat pipe comprises a pipe body, wherein one segment of the pipe body is a condensation segment, and the other segment of the pipe body is an evaporation segment; an outer fin structure is arranged on the portion, corresponding to the condensation segment, outside the pipe body, and an outer groove structure is arranged on the portion, corresponding to the evaporation segment, outside the pipe body. The combined outer structure heat pipe has the advantages of being simple and reliable in machining technology, good in condensation effect when applied to the vertical heat pipe condenser and easy to maintain and belongs to the technical field of parts of condensers.

Description

A kind of compound external structure heat pipe for vertical heat pipe condenser
Technical field
The utility model relates to the parts of condenser, particularly relates to a kind of compound external structure heat pipe for vertical heat pipe condenser.
Background technology
The equipment of realizing heat transmission between two kinds of materials in industrial production is referred to as condenser, and condenser is a kind of common processing equipment of generally applying in industries such as petrochemical industry, metallurgy, electric power, light industry, food.In oil refining, chemical plant installations, condenser accounts for 40% left and right of total number of devices.In recent years, along with the development of power-saving technology, application constantly expands, and utilizes condenser to carry out high temperature and low temperature heat energy and reclaims and brought significant economic benefit.Condenser is typical process equipment, applies very generally, and almost any Chemical Manufacture technique all be unable to do without it.
Heat tube type cold condenser is also the one in condenser, and heat pipe is a kind of heat transfer element with high thermal conductivity, and it carrys out transferring heat by the evaporation and condensation of liquid working substance in Totally enclosed vacuum body, has high thermal conductivity.The application of heat pipe in condenser can have that heat transfer efficiency is high, compact conformation, fluid resistance damage little, be conducive to control the advantages such as dew point corrosion.Can be applied in the industries such as metallurgy, chemical industry, oil refining, boiler, pottery, traffic, light textile, machinery.
And the main heat transfer element that heat tube type cold condenser uses is at present gravity assisted heat pipe, but this heat pipe does not have good invigoration effect for evaporation, condensation and the backflow of liquid working substance in body, is unfavorable for increasing the heat exchange property of heat pipe and the overall performance of condenser.And to be much applied in heat pipe in condenser be all that body does not have the light pipe of external structure or is only processed with the single structure heat pipe of fin at the condensation segment of body, and there is no work strengthening structure at the evaporator section of heat pipe, be unfavorable in condenser that steam is at the condensing heat-exchange on the evaporator section surface of body, on body, the liquid of condenser easily forms thicker liquid film layer, condensation number is larger, liquid film layer is thicker, this has lowered the coefficient of heat transfer of steam in condenser greatly, is unfavorable for the overall performance of condenser.
Utility model content
For the technical problem existing in prior art, the purpose of this utility model is: a kind of compound external structure heat pipe for vertical heat pipe condenser with better condensation effect is provided.
In order to achieve the above object, the utility model adopts following technical scheme:
For a compound external structure heat pipe for vertical heat pipe condenser, comprise body, one section of body is condensation segment, another section is evaporator section; The outer corresponding condensation segment of body is outer fin structure, and corresponding evaporator section is outer channel structure.Adopt after this structure, body is compounded with outer fin structure and outer channel structure outward, and on the one hand, outer fin structure has the effect that increases area of dissipation, enhance heat efficiency; On the other hand, outer channel structure has strengthening steam-condensation heat transfer effect; Generally speaking, composite construction effectively improves condensation effect.
For a compound external structure heat pipe for vertical heat pipe condenser, also comprise upper end cover, bottom end cover and liquid-sucking core; Upper end cover is installed on body one end near condensation segment, and bottom end cover is installed on body one end near evaporator section, and liquid-sucking core is close to the inwall of body; Bottom end cover is conical.Adopt after this structure, in the time that compound external structure heat pipe is vertically placed, conical bottom end cover is beneficial to gathering and falling of condensate liquid in condenser.
For a compound external structure heat pipe for vertical heat pipe condenser, also comprise a vacuum tube, one end of vacuum tube and the outside of upper end cover join, other end sealing; Vacuum tube, body, upper end cover and bottom end cover form the confined space of a receiving fluids working medium.Adopt after this structure, vacuum tube can be filled with liquid working substance and vacuumize body inside, simple in structure, easy to operate.
Outer fin structure comprises along body and is axially nested in successively the multiple outer fin unit outside body; Outer channel structure comprises many outer channel that are evenly distributed on tube wall, and the length direction of outer channel is consistent with the length direction of body.Adopt after this structure, compound external structure heat pipe structure is simple, easy to make; The shape of cross section of outer channel can be triangle, waveform, U-shaped or rectangle etc.The centre of outer fin unit is the annulus partial sheet of socket body, and annulus part periphery is the outer fin thin slice of arranging along even circumferential.
Condensation segment accounts for 2/5 to 3/5 of body total length.Adopt after this structure, corresponding 3/5 to 2/5 of the body total length that accounts for of evaporator section, can obtain good condensation effect.
For a compound external structure heat pipe for vertical heat pipe condenser, in vertical heat pipe condenser, along vertical direction setting, upward, evaporator section down for condensation segment.Adopt after this structure, be beneficial to gathering and falling of condensate liquid in condenser.
For a manufacture method for the compound external structure heat pipe of vertical heat pipe condenser, comprise the steps: the processing of a. body: make body; Make drawing mould according to the parameter of outer channel, utilize drawing equipment to process outer channel structure at the corresponding evaporating section of tube wall; B. the processing of outer fin unit, upper end cover and bottom end cover: outer fin unit, upper end cover and bottom end cover are made in punching press; The outside welding vacuum tube of upper end cover; C. the processing of outer fin structure: corresponding condensation segment, is nested in outer fin unit outside body successively; Body is carried out to expand tube, make outer fin unit and body interference close contact; By integral to body and outer fin unit heat preservation sintering; D. the processing of liquid-sucking core: by bottom end cover and body sealing; One plug inserts and is positioned at the center of body from body upper end, fill the material of making liquid-sucking core between plug and the inwall of body, and with together sintering processes of body, liquid-sucking core fits tightly at inboard wall of tube body; E. encapsulation: take out plug; The sealing of upper end cover and body, injects liquid working substance in body by vacuum tube, by vacuum tube to vacuumizing in body, sealed vacuum pipe.After adopting in this way, processing technology is simple and reliable.
The body of compound external structure heat pipe, outer fin unit, upper end cover, bottom end cover and vacuum tube are being processed combination and sealing in conjunction with the front cleaning step that all passes through; Cleaning step is that dilute acid soln that parts are put into volumetric concentration 5%~10% washes away residual chip after surface and oil contaminant and processing, then puts it into Ultrasonic Cleaning in ethanolic solution, finally washes away remained on surface solution with clear water; Sintering process, sintering temperature is material melting point 0.7 to 0.8 times, sintering time is 30min to 120min, sintering process adopts temperature-gradient method; Sintering furnace is hydrogen, nitrogen or oxygen protective atmosphere sintering furnace, or is vacuum sintering furnace.After adopting in this way, adopt cleaning step and select suitable sintering parameter, can ensure that process reliably carries out.
Outer fin unit is identical with the material of liquid-sucking core, only uses one sintering circuit.After adopting in this way, adopt same material can omit operation, simplify step, save time.
In step a, the material of body is copper, aluminium or steel; In steps d, one or both in material selection metal dust and the metallic fiber of liquid-sucking core, the porosity of liquid-sucking core is 50%-90%; In step e, liquid working substance is pure water, acetone, methyl alcohol or ethanol.After adopting in this way, the porosity of the liquid-sucking core of body inside is high, has thermal contact resistance little, the feature that heat-transfer rate is fast and capillary force is strong.
Generally speaking, the utlity model has following advantage: processing technology is simple and reliable, during for vertical heat pipe condenser, condensation effect is good, safeguards simple.
1. the compound external structure heat pipe for vertical heat pipe condenser of the present utility model, its body is outward the composite construction that outer fin structure and outer channel structure combine, and the condensation segment of body is outer fin structure, and fin is sinter molding, make fin and body be sintered to one, do not have thermal contact resistance; Outer fin structure can effectively increase area of dissipation, enhance heat efficiency.
2. the evaporator section of body is outer channel structure, for vertical heat pipe condenser, steam is in the surface condensation of outer channel, condensate liquid is diffusion rapidly under the capillary force effect of outer channel, flow to rapidly trough valley by groove peak, the condensate liquid rete at groove peak is become as thin as a wafer, and the average condensation coefficient that the method for this condensate liquid non-uniform Distribution that makes condensing heat-exchange surface obtains is more much higher than the heat transfer coefficient of the uniform thickness liquid film on light pipe, can efficient hardening condensing heat-exchange.
3. compound external structure heat pipe is vertically to place in condenser, and the direction that makes outer channel is along the outer surface of body straight down, and condensate liquid is drained downwards in time under the capillary force of conduit and the effect of gravity; Bottom end cover is conical, is beneficial to gathering and falling of condensate liquid in condenser.
4. the porosity of the liquid-sucking core of body inside is high, specific area is large, heat transfer area is large, effectively improve capillary force, reduce liquid backflow resistance, be with three-dimensional capillary force reinforced structure can increase when steam inside is propagated simultaneously and stream effect, improve the heat-transfer effect of steam at internal face, reduced internal face thermal resistance; And sintered type liquid sucting core structure is stable, difficult drop-off, serviceability is reliable.
Brief description of the drawings
Fig. 1 is a kind of front view of the compound external structure heat pipe for vertical heat pipe condenser.
Fig. 2 is the cutaway view of Fig. 1.
Fig. 3 is a kind of stereogram of the compound external structure heat pipe for vertical heat pipe condenser.
Fig. 4 is the schematic diagram that compound external structure heat pipe is installed on vertical heat pipe condenser.
The shape of cross section schematic diagram that Fig. 5 a, 5b, 5c, 5d are outer channel.
Wherein, 1 is vacuum tube, and 2 is that upper end cover, 3 is that outer fin unit, 4 is body, and 5 is outer channel, and 6 is bottom end cover, and 7 is liquid-sucking core, and 8 is steam.
Detailed description of the invention
Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail, but embodiment of the present utility model is not limited to this.
In the present embodiment, the shape of cross section of outer channel is rectangle; Liquid-sucking core is copper powder sintering core, and particle diameter is about 200 order branch shape copper powders; The size of compound external structure heat pipe each several part can be determined as the case may be voluntarily.
For a compound external structure heat pipe for vertical heat pipe condenser, comprising: upper end cover, body, bottom end cover, outer fin unit, liquid-sucking core, vacuum tube and liquid working substance.Upper end cover is inserted in the outer ladder mouth at body top, is sealed and matched with tube wall.The inwall of liquid-sucking core and body fits tightly.Body inside is filled with liquid working substance, and liquid working substance can be any one in pure water, third intoxicated, methyl alcohol and ethanol.Body is inner is vacuum seal.
The middle part in the outside of upper end cover is provided with the vacuum tube communicating with body inside, the outermost end sealing of vacuum tube.
Bottom end cover is conical, is beneficial to gathering and falling of condensate liquid in condenser.
Body is cylindrical shape, and outer wall is compound external structure, and the outer corresponding condensation segment of body is outer fin structure, and the outer corresponding evaporator section of body is outer channel structure, and evaporator section accounts for 2/5 to 3/5 of body total length.
Fig. 4 has enumerated wherein a kind of application (application is not limited to diagramatic way) of compound external structure heat pipe, and left arrow represents that low-temperature receiver enters, and right arrow represents that low-temperature receiver goes out.The low-temperature receiver of condensation segment can be air-cooled or water-cooled; Compound external structure heat pipe is vertically to place in condenser.
As shown in Fig. 5 a, 5b, 5c, 5d, the cross section of outer channel can be triangle, waveform, U-shaped or rectangle etc.
The material of liquid-sucking core is one or both mixing in metal dust and metallic fiber, and liquid-sucking core porosity is 50%-90%.
Liquid working substance is any one in pure water, acetone, methyl alcohol and ethanol.
The material of body is copper, aluminium or steel.
The manufacture method of the above-mentioned compound external structure heat pipe for vertical heat pipe condenser, can realize as follows:
A. the processing of body:
(1) manufacture columnar body by rolling, hot extrusion, cold extrusion or other pressure casting methods;
(2) process ladder mouth at the outer wall of the upper end of body;
(3) produce drawing mould according to the configuration design parameter of outer channel, utilize drawing equipment the outer surface of body process respective shapes along circumferential even, compact arranged vertical outer channel, many outer channel forms outer channel structure, is distributed in evaporator section; Outer channel structure accounts for 2/5 to 3/5 of body total length;
B. the processing of outer fin unit, upper end cover and bottom end cover:
(1) produce corresponding diel according to the design parameter of outer fin unit, upper end cover and bottom end cover, utilize pressing equipment to produce corresponding parts;
(2) wherein the middle part of upper end cover is welded with vacuum tube;
C. the processing of outer fin structure:
(1) the outer fin unit preparing is successively layered in outside body in the ratio of shared body length;
(2) the heat pipe body assembling is adopted the modes such as mechanical expanding, hydraulic expanding tube carry out expand tube, make outer fin unit and body interference close contact;
(3) body expand tube being completed is put into vacuum sintering furnace or atmosphere protection stove, carries out heat preservation sintering;
D. the processing of liquid-sucking core:
By bottom end cover and pipe welding good seal, insert corresponding plug by the upper end of body, plug is positioned at the center of body, in the space forming at the inwall of plug and body, insert metal dust or metallic fiber, then put into sintering furnace together with body and carry out sintering, after sintering, to be cooled to room temperature taking-up plug;
E. encapsulation:
Take out after plug, upper end cover is placed in to welded seal in body ladder mouth, then liquid working substance is joined in body by vacuum tube, then by vacuum tube, body is vacuumized, finally sealed vacuum tube.
The parts of all compound external structure heat pipes had cleaning step before processing combination or sealing combination, specifically, first the dilute acid soln of parts being put into volumetric concentration 5%~10% washes away surface and oil contaminant and the rear residual chip of processing, then put it into Ultrasonic Cleaning in ethanolic solution, finally wash away remained on surface solution with clear water.
Outer fin unit is identical with the material of liquid-sucking core, only uses one sintering circuit.Sintering temperature is 0.7 to 0.8 times of fusing point, and sintering time is 30min to 120min, and sintering process adopts temperature-gradient method; Sintering furnace is hydrogen, nitrogen or oxygen protective atmosphere sintering furnace, or is vacuum sintering furnace.
Above-described embodiment is preferably embodiment of the utility model; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.

Claims (6)

1. for a compound external structure heat pipe for vertical heat pipe condenser, comprise body, one section of body is condensation segment, and another section is evaporator section, it is characterized in that: the outer corresponding condensation segment of described body is outer fin structure, and corresponding evaporator section is outer channel structure.
2. according to a kind of compound external structure heat pipe for vertical heat pipe condenser claimed in claim 1, it is characterized in that: it also comprises upper end cover, bottom end cover and liquid-sucking core; Upper end cover is installed on body one end near condensation segment, and bottom end cover is installed on body one end near evaporator section, and liquid-sucking core is close to the inwall of body; Bottom end cover is conical.
3. according to a kind of compound external structure heat pipe for vertical heat pipe condenser claimed in claim 2, it is characterized in that: it also comprises a vacuum tube, one end of vacuum tube and the outside of upper end cover join, other end sealing; Vacuum tube, body, upper end cover and bottom end cover form the confined space of a receiving fluids working medium.
4. according to a kind of compound external structure heat pipe for vertical heat pipe condenser claimed in claim 1, it is characterized in that: described outer fin structure comprises along body and is axially nested in successively the multiple outer fin unit outside body; Outer channel structure comprises many outer channel that are evenly distributed on tube wall, and the length direction of outer channel is consistent with the length direction of body.
5. according to a kind of compound external structure heat pipe for vertical heat pipe condenser claimed in claim 1, it is characterized in that: described condensation segment accounts for 2/5 to 3/5 of body total length.
6. according to a kind of compound external structure heat pipe for vertical heat pipe condenser claimed in claim 1, it is characterized in that: it is along vertical direction setting in vertical heat pipe condenser, and upward, evaporator section down for condensation segment.
CN201320825298.0U 2013-12-12 2013-12-12 Combined outer structure heat pipe used for vertical heat pipe condenser Expired - Fee Related CN203642759U (en)

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Application Number Priority Date Filing Date Title
CN201320825298.0U CN203642759U (en) 2013-12-12 2013-12-12 Combined outer structure heat pipe used for vertical heat pipe condenser

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103727823A (en) * 2013-12-12 2014-04-16 华南理工大学 Combined exterior structural heat pipe for vertical heat-pipe condensers and manufacturing method thereof
CN104390296A (en) * 2014-11-06 2015-03-04 吴速 Ground temperature heat pipe air regulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103727823A (en) * 2013-12-12 2014-04-16 华南理工大学 Combined exterior structural heat pipe for vertical heat-pipe condensers and manufacturing method thereof
CN104390296A (en) * 2014-11-06 2015-03-04 吴速 Ground temperature heat pipe air regulator
CN104390296B (en) * 2014-11-06 2017-02-01 吴速 Ground temperature heat pipe air regulator

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140611

Termination date: 20161212

CF01 Termination of patent right due to non-payment of annual fee