CN113357947B - Gravity type heat pipe, boiler and gravity type heat pipe manufacturing method - Google Patents
Gravity type heat pipe, boiler and gravity type heat pipe manufacturing method Download PDFInfo
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- CN113357947B CN113357947B CN202110653281.0A CN202110653281A CN113357947B CN 113357947 B CN113357947 B CN 113357947B CN 202110653281 A CN202110653281 A CN 202110653281A CN 113357947 B CN113357947 B CN 113357947B
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- material injection
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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
- F28D15/025—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 having non-capillary condensate return means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The gravity type heat pipe comprises a steel pipe, an upper blocking plate, a lower blocking plate, a medium and an air-extracting and material-injecting head, wherein the upper blocking plate and the lower blocking plate are respectively provided with vertical flanges, are respectively arranged outwards in the directions of two ends of the steel pipe and are in tight fit with the steel pipe, the air-extracting and material-injecting head is arranged in a root hole through a root hole with the vertical flanges opposite to the first vertical flanges, and the two are in tight fit with each other while the air-extracting and material-injecting head also comprises a plug, an inner tooth matched with a one-way valve and an outer tooth steel pipe matched with the inner tooth head of an air-extracting and material-injecting system, and proper medium is filled in the outer tooth steel pipe. The invention improves the quality of welding seams and the air tightness of the gravity type heat pipe through the excessively tight fit of the parts.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to a gravity type heat pipe, a boiler and a gravity type heat pipe manufacturing method.
Background
Gravity heat pipes are a type of heat exchange device. The air in the pipe is pumped out by sealing two ends of a section of steel pipe to form a vacuum pipe, a proper medium is injected into the pipe, when the lower end of the pipe is heated, the medium in the pipe is evaporated and moves upwards, the evaporated gas is liquefied when the upper end is cooled and emits heat, the liquefied liquid flows downwards under the action of self gravity, and the circulation is carried upwards continuously to carry the heat at the lower end. The heat at the lower end can be carried to the upper end only by selecting a proper medium under the condition that the temperature difference exists between the upper end and the lower end of the steel pipe.
The existing gravity type heat pipe comprises a steel pipe, blocking plates at two ends of the steel pipe, an air suction and material injection throwing head, a medium, a welding line and a plug, wherein an O-shaped sealing ring is inserted from one end of the two ends, so that the diameter of the blocking plates at the two ends is the same as that of the steel pipe, and meanwhile, the thickness of one circle of welding line is also the same, the diameter of the blocking plates can only be the diameter of the steel pipe at most, the circle degree of the welding line position of the steel pipe is insufficient, the welding line is narrow in time width, the quality of the welding line cannot be guaranteed, an air leakage phenomenon frequently occurs, the air tightness of the gravity type heat pipe cannot be guaranteed, meanwhile, the quality defect of the welding line is aggravated due to the fact that manual welding is caused, and labor cost is very high.
The gravity type heat pipe boiler is a boiler combining a gravity type heat pipe and a boiler, and the gravity type heat pipe can effectively recycle the waste heat of the flue gas, thereby achieving the purposes of saving energy and improving the heat efficiency. The exhaust gas temperature of the existing gravity type heat pipe boiler is designed above the dew point of sulfur dioxide, namely, the exhaust gas temperature is more than 160 ℃, and the requirements of environmental protection and energy conservation cannot be met. Therefore, the gravity type heat pipe can be improved to solve the environmental protection and energy problems.
Disclosure of Invention
The invention aims to provide a gravity type heat pipe, a boiler and a gravity type heat pipe manufacturing method, so as to improve the quality of the gravity type heat pipe and solve the problems of environmental protection and energy conservation.
In order to achieve the above object, the present invention provides the following solutions:
the gravity type heat pipe comprises a steel pipe, an upper blocking plate, a lower blocking plate, a medium and an air extraction and material injection throwing head;
the upper blocking plate and the lower blocking plate are respectively arranged at two ends of the steel pipe and are in tight fit with the steel pipe; the upper blocking plate and the lower blocking plate are respectively provided with a vertical flanging, and the vertical flanging of the upper blocking plate is opposite to the vertical flanging of the lower blocking plate and faces outwards;
the upper plugging plate is provided with a root base hole, the root base hole is provided with a vertical flanging, the vertical flanging of the root base hole is integrated with the upper plugging plate, and the direction of the vertical flanging of the root base hole is opposite to the direction of the vertical flanging of the upper plugging plate;
the air extraction and material injection throwing head is arranged in the root base hole and is in tight fit with the root base hole; the air extraction and material injection throwing head comprises a plug;
the medium is filled in the steel pipe, the working temperature of the medium is 70-80 ℃, the medium is gas under normal temperature, and the medium is liquid under pressure.
Optionally, the air extraction and material injection throwing head comprises: a one-way valve and an inner tooth; the check valve is provided with outer teeth and side seals, and the outer teeth of the check valve are matched with the inner teeth of the air suction and material injection swing head and the side seals in a non-air leakage mode.
Optionally, the air-extracting and material-injecting swing head further comprises: an outer tooth; the outer teeth of the air extraction and material injection throwing head are matched with the inner teeth of the air extraction and material injection system in a way that air cannot leak.
A boiler comprising a gravity fed heat pipe according to any of the preceding claims.
A method of manufacturing a gravity fed heat pipe, the method comprising:
determining the outer diameters of an upper blocking plate and a lower blocking plate according to the inner diameter of a steel pipe, and respectively punching vertical flanging of the upper blocking plate and the lower blocking plate by using a first punching die;
punching a root base hole at the central part of the upper blocking plate by using a second punching die, and enabling the root base hole to have a vertical flanging with the opposite direction to the vertical flanging of the upper blocking plate;
the one-way valve is arranged in the air extraction and material injection throwing head, and the two are connected through corresponding inner teeth and outer teeth and are sealed through the side outside;
the air-extracting and material-injecting throwing head is arranged in the root base hole, and the position on the flanging top of the root base hole is connected with the air-extracting and material-injecting throwing head in a welding mode;
the upper blocking plate and the lower blocking plate are arranged at two ends of the steel pipe, so that the vertical flanging of the upper blocking plate is opposite to the vertical flanging of the lower blocking plate and faces outwards, and the vertical flanging of the upper blocking plate and the vertical flanging of the lower blocking plate are connected with each other on top of heads at the two ends in a welding mode;
the outer teeth connected with the air extraction and material injection throwing head are connected with the inner teeth of the air extraction and material injection system to start an air extraction vacuum pump, and the inside of the steel pipe is pumped into a certain negative pressure value;
injecting a quantitative medium into the steel pipe; the working temperature of the medium is 70-80 ℃, the medium is gas in normal state, and the medium is liquid under pressure;
and inserting a plug of the air-extracting and material-injecting throwing head, and welding the plug in the air-extracting and material-injecting throwing head in a welding mode.
Optionally, the manufacturing method further includes: the check valve is arranged in the air suction and material injection throwing head, and after the check valve and the air suction and material injection throwing head are connected through corresponding inner teeth and outer teeth, the air tightness of the check valve, the corresponding inner teeth and outer teeth in the air suction and material injection throwing head and the matching of side sealing are required to be checked; if the air tightness is unqualified, the air tightness cannot be used; and if the air tightness is qualified, installing the air suction material injection throwing head in the root base hole.
Optionally, the manufacturing method further includes: the air extraction and material injection throwing head is arranged in the root base hole, the axis of the air extraction and material injection throwing head is perpendicular to the end face of the vertical flanging of the root base hole, and after the position of the flanging top of the root base hole is connected with the air extraction and material injection throwing head in a welding mode, the air tightness of the welding joint of the air extraction and material injection throwing head and the flanging of the root base hole is required to be checked; if the air tightness is unqualified, finding out leakage points on the welding line, repairing and welding the leakage points, checking whether the welding line has leakage points or not, and finally, if the air tightness without the leakage points is qualified, installing the upper blocking plate and the lower blocking plate at two ends of the steel pipe.
Optionally, the manufacturing method further includes: the upper blocking plate and the lower blocking plate are arranged at two ends of the steel pipe, the vertical flanges of the upper blocking plate are opposite to the vertical flanges of the lower blocking plate and face outwards, and after the upper blocking plate and the lower blocking plate are connected with the tops of the two ends in a welding mode, the air tightness of the welding joints of the upper blocking plate and the lower blocking plate and the steel pipe respectively needs to be checked; if the air tightness is unqualified, finding out leakage points on the welding line, repairing and welding the leakage points, and then checking whether the welding line has leakage points or not, and finally, if not, judging whether the welding line is qualified; and if the air tightness is qualified, starting a suction vacuum pump to vacuumize through the connection of the outer teeth of the suction material injection throwing head and the inner teeth of the suction material injection system.
Optionally, the manufacturing method further includes: after the quantitative medium is injected into the steel pipe, whether the valve core of the one-way valve returns accurately after the medium is injected is checked to ensure that the medium is not leaked, and if the medium is leaked, the valve core position of the one-way valve is readjusted to ensure that the medium is not leaked; if the medium does not leak, a plug for exhausting, injecting and throwing the material is inserted.
Optionally, the manufacturing method further includes: the plug inserted with the air-extracting and material-injecting head is welded to be dead in the air-extracting and material-injecting head in a welding mode, and then the welding tightness between the air-extracting and material-injecting head and the plug is required to be checked; if the air tightness is unqualified, finding out leakage points for repairing and welding so that the leakage points are no longer leaked, and re-checking whether leakage points exist or not, and finally, if the leakage points cannot exist, the leakage points are qualified; and if the air tightness is qualified, obtaining the qualified gravity type heat pipe.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the gravity type heat pipe comprises the upper blocking plate and the lower blocking plate which are provided with vertical flanging, the root base hole formed in the upper blocking plate is also provided with vertical flanging, and all the parts are in tight fit, so that the contact area between the parts is increased, and the air tightness of the gravity type heat pipe is improved; the one-way valve is arranged in the air-extracting and material-injecting swing head, so that the problem of medium air-extracting and material-injecting which is gas under a certain pressure and is liquid in a normal state is solved.
The boiler comprises the gravity type heat pipe, so that the smoke exhaust degree of the boiler is about 70 ℃, the thermal efficiency of the boiler is improved, and the emission of pollutants is reduced.
The gravity type heat pipe manufacturing method provided by the invention comprises the steps of detecting the air tightness of each part, so that the yield of the gravity type heat pipe is improved, the air tightness is gradually detected according to the working procedure, a large amount of reworking is avoided, the material consumption is reduced, and the manufacturing efficiency is improved. According to the structural characteristics of the gravity type heat pipe, the welding without welding flux is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a gravity assisted heat pipe according to the present invention;
FIG. 2 is a schematic view of an upper or lower closure plate;
FIG. 3 is a schematic view of a closure plate with a root orifice 6;
FIG. 4 is a detailed schematic diagram of the suction and injection head;
symbol description:
1-upper blocking plate, 2-lower blocking plate, 3 steel tube, 4-air extraction and material injection head, 4-1-one-way valve, 4-2-one-way valve outer teeth and air extraction and material injection head inner teeth, 4-3-air extraction and material injection head outer teeth, 4-4-plug, 5-medium and 6-base hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a gravity type heat pipe, a boiler and a gravity type heat pipe manufacturing method, so as to improve the quality of the gravity type heat pipe and solve the problems of environmental protection and energy conservation.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
A gravity type heat pipe comprises a steel pipe 3, an upper blocking plate 1, a lower blocking plate 2, a medium 5 and an air extraction and material injection throwing head 4.
The upper blocking plate 1 and the lower blocking plate 2 are respectively arranged at two ends of the steel pipe 3 and are in tight fit with the steel pipe 3; the outer diameter of the upper blocking plate 1 and the outer diameter of the lower blocking plate 2 are both 0.03-0.06 mm larger than the inner diameter of the steel pipe 3. The upper blocking plate 1 and the lower blocking plate 2 are provided with vertical flanging, and the vertical flanging of the upper blocking plate 1 is opposite to the vertical flanging of the lower blocking plate 2 and faces outwards. The end surfaces of the upper blocking plate 1 and the lower blocking plate 2 which are processed by flanging machine are respectively parallel to the end surfaces of the steel pipes 3.
The upper plugging plate 1 is provided with a root base hole 6, the root base hole 6 is provided with a vertical flanging, the vertical flanging of the root base hole 6 is integrated with the upper plugging plate 1, and the direction of the vertical flanging of the root base hole 6 is opposite to the direction of the vertical flanging of the upper plugging plate 1.
The air extraction and material injection throwing head 4 is arranged in the root base hole 6 and is in tight fit with the root base hole; the outer diameter of the air extraction and material injection throwing head 4 is 0.03-0.05 mm larger than the inner diameter of the root hole 6. The air extraction and material injection throwing head 4 comprises a plug 4-4. The air-extracting and material-injecting throwing head 4 comprises a one-way valve 4-1 and an inner tooth one-way valve 4-1 matched with the one-way valve, wherein outer teeth are arranged on the one-way valve 4-1, and air leakage cannot be matched with the inner teeth of the air-extracting and material-injecting throwing head 4 through side sealing and air leakage. The air-extracting and material-injecting throwing head 4 also comprises an outer tooth 4-3 of the outer tooth air-extracting and material-injecting throwing head 4, which is matched with an inner tooth head of the air-extracting and material-injecting system without leakage. The axis of the air extraction and material injection throwing head 4 is vertical to the end face of the vertical flanging of the root base hole 6.
The medium 5 is filled in the steel pipe 3, the working temperature of the medium 5 is 70-80 ℃, the medium is gas in a normal state, and the medium is liquid under the condition of pressure.
The gravity type heat pipe comprises the upper blocking plate 1 and the lower blocking plate 2 which are provided with vertical flanging, the root holes 6 formed in the upper blocking plate 1 are also provided with vertical flanging, and all the parts are in tight fit, so that the contact area between the parts is increased, and the air tightness of the gravity type heat pipe is improved; the one-way valve 4-1 is arranged in the air-extracting and material-injecting swing head 4, so that the problem of air-extracting and material-injecting of the medium 5 which is normally gas and liquid under certain pressure is solved.
A boiler comprises the gravity type heat pipe, the gravity type heat pipe can effectively recycle the waste heat of the flue gas, the flue gas exhaust degree of the boiler is about 70 ℃, the thermal efficiency of the boiler is improved, and the emission of pollutants is reduced.
The invention also provides a method of manufacturing a gravity fed heat pipe, the method comprising:
and determining the outer diameters of the upper blocking plate and the lower blocking plate according to the inner diameter of the steel pipe, and respectively punching vertical flanging of the upper blocking plate and the lower blocking plate by utilizing a first punching die. The outer diameter of the upper blocking plate and the outer diameter of the lower blocking plate are both 0.03-0.06 mm larger than the inner diameter of the steel pipe, namely, the tight fit between the upper blocking plate and the steel pipe and the tight fit between the lower blocking plate and the steel pipe are ensured, and the positioning function is realized.
And punching a root base hole at the central part of the upper blocking plate by using a second punching die, and enabling the root base hole to have a vertical flanging with the opposite direction to the vertical flanging of the upper blocking plate. The outer diameter of the air suction material injection throwing head is 0.03-0.05 mm larger than the inner diameter of the root hole, so that the air suction material injection throwing head and the root hole are in close fit and play a role in positioning.
The one-way valve is arranged in the air suction and material injection throwing head, and the two are connected through corresponding inner teeth and outer teeth; and checking the matched air tightness of the corresponding inner and outer teeth and the side sealing parts in the check valve and the air extraction and material injection throwing head.
The air suction and material injection throwing head is arranged in the root base hole, is positioned on the flanging top of the root base hole, is connected with the air suction and material injection throwing head in a welding mode, and is used for detecting the air tightness of a welding joint between the air suction and material injection throwing head and the root base hole. The upper blocking plate is in vertical relation with the air suction material injection throwing head, and the vertical relation is necessarily ensured during installation.
The upper blocking plate and the lower blocking plate are arranged at two ends of the steel pipe, so that the vertical flanging of the upper blocking plate is opposite to the vertical flanging of the lower blocking plate and faces outwards, and the vertical flanging of the upper blocking plate and the vertical flanging of the lower blocking plate are connected with each other in a welding mode on the top of heads at the two ends.
The medium selected by the existing gravity type heat pipe is liquid at normal temperature, the selected liquid medium is injected into the gravity type heat pipe through an air suction injection throwing head without a one-way valve, the bottom of the gravity type heat pipe is heated to enable the medium to reach a boiling state, steam is discharged through the air suction injection throwing head, the medium is kept for a certain time in the state, a prepared plug is quickly inserted into the air suction injection throwing head, the plug and the air suction injection throwing head are quickly welded together by electric welding, and the negative pressure of the gravity type heat pipe is ensured not to be damaged. The temperature of the boiler exhaust gas based on the existing gravity type heat pipe is about 160 ℃, but the current requirements are environmental protection and energy conservation, so the situation needs to reduce the smoke reduction to solve the environmental protection and energy problems.
The gravity type heat pipe is characterized in that outer teeth of an air extraction and material injection throwing head are connected with inner teeth of an air extraction and material injection system, and a vacuum pump is started to pump the inside of a steel pipe to a certain negative pressure value; then, a certain medium is injected into the steel pipe quantitatively; the working temperature of the medium is 70-80 ℃, and the medium is normally gas and liquid under pressure. The temperature of the discharged smoke of the boiler based on the gravity type heat pipe is 70-80 ℃, so that the thermal efficiency of the boiler is improved, and the emission of pollutants is reduced.
Machining two end faces of the steel pipe and the end faces of the vertical flanges of the upper blocking plate and the lower blocking plate to enable the end faces to be horizontal, no burrs are formed on the end faces, the edge ports are complete, no concave convex curled edges and the like are formed, the upper blocking plate and the lower blocking plate are arranged at two ends of the steel pipe, the vertical flanges of the upper blocking plate are opposite to the vertical flanges of the lower blocking plate, the flanging machining faces face outwards, and the machined end faces of the upper blocking plate and the lower blocking plate are flush with the machined end faces of the steel pipe and are connected in a welding mode; and (5) checking the air tightness of the welding seams of the upper blocking plate and the lower blocking plate with the steel pipe respectively.
The air-extracting and material-injecting throwing head comprises an inner tooth matched with an outer tooth containing a one-way valve, and the upper end of the outer surface of the inner tooth also contains an outer tooth and a plug. When the suction and injection material throwing head is in the open state, the air in the gravity type heat pipe is pumped out through the vacuum pump, the maximum negative pressure value is ensured, at the moment, the vacuum pump is closed to open the material throwing valve, the medium is gas under the condition of pressure and liquid under the normal state, under the action of gravity and negative pressure, the medium continuously flows into the gravity type heat pipe, when the fixed quantity is reached, the material throwing valve is closed to release the connection between the inner tooth head of the material throwing system and the outer tooth at the upper end of the outer surface of the throwing head, after that, the one-way valve is in the completely closed state, the injected medium is not leaked out, at the moment, the plug is quickly inserted into the suction and injection material throwing head, and the plug is quickly welded in the suction and injection material throwing head by electric welding, the tightness of the suction and injection material throwing head and the plug is checked, the leakage is not ensured, and the future is not leaked, and the non-solder automatic welding manufacturing method of the gravity type heat pipe of the whole boiler is completed.
The welding operation without welding flux is finished by adopting an automatic welding machine, and the welding speed, angle, current and the like are controlled, so that the working efficiency is improved, and meanwhile, the steel pipe can be made of a pipeline material with a thinner thickness. The key conditions of the blanking-free welding are as follows: 1. the dense welding seam, that is, the more dense and better the welding seam, is, whether the welding seam needs to be added or not, the larger the welding seam, the welding seam needs to be filled in advance to perform welding work, and meanwhile, the welding seam needs to be added. 2. The weld joints are regular, i.e. the levelness (i.e. straight line) or radian with the same radius is guaranteed not to be askew. 3. The length of the welding arc needs to be consistent, namely the distance between the welding needle and the welded piece needs to be ensured to be a certain distance. 4. The weldment and the weldment to be welded are reliably fixed. Therefore, the original manual welding is difficult to achieve, and the quality of the welding seam cannot be ensured.
The invention realizes non-solder welding by the following process:
(1) The upper plug and the lower plug are stamped into the vertical flanging by using a punching machine and a die, so that the edge ring opening of the vertical flanging is quite round, namely has rigidity and roundness, and the die is used for enabling the central material to flow upwards to the flanging, so that the flanging ring is thickened more severely and has rigidity. (2) Because of the thinner steel pipe, the pipe orifice is not very round, i.e. the welding pins with different radii do not overlap with the welding line when passing, it is not possible to perform automatic welding at all. The upper blocking plate and the lower blocking plate are both inserted into the steel pipe, and the roundness of the pipe orifice can be corrected by vertically flanging. And meanwhile, the two ends of the steel pipe are subjected to mechanical processing to ensure the plane perpendicularity of the steel pipe. The outer diameter of the turned edge of the upper blocking plate and the outer diameter of the turned edge of the lower blocking plate are larger than the inner diameter of the steel pipe, so that the effect of tight fit and fixation is achieved, and therefore welding seams generated by the fit between the upper blocking plate and the lower blocking plate are round and solid, no gaps are basically generated, and the upper blocking plate and the lower blocking plate are welded into a whole as long as the upper blocking plate and the lower blocking plate are burnt and melted, and therefore welding without welding flux can be achieved. (3) The material is got rid of to the material of bleeding is welded and is at the centre of last closure plate is geometric centre, namely on the centre of circle, and the centre of last end cap is the perpendicular turn-ups of reverse punching earlier, and the edge height that the rethread terminal surface machining made the turn-ups is the same and parallel and level, and the material of bleeding is got rid of the material and is put the position of welding with last closure plate central point position simultaneously and is processed through the lathe earlier, guarantees its circularity simultaneously and guarantees its too tight fit with root hole 6 again, even does not have the gap between them and circularity again unanimity simultaneously, creates the condition for solderless automatic weld like this. (4) The automatic welder adopts the machine tool and the numerical control rotary main machine, namely, the steel pipe is added on the rotary machine to rotate, and the welding needle of the welding handle is fixed in any direction and position, once the optimal welding needle distance is adjusted, the generated welding arc has consistent length, the welding needle is fixed in the direction, the current of the welder is adjusted, the rotating speed and the rotating degree are adjusted, the problem of covering the interface of the welding seam is solved, so that the quality of the welded welding seam is very high, the speed is very fast, and all contradictions of manual welding of the welder are overcome, and the efficiency is high
According to the invention, the argon arc automatic welding technology is utilized to improve welding quality, reduce labor cost, and meanwhile, corresponding inspection steps are added in the manufacturing process, so that a large amount of reworking is avoided, material consumption is reduced, and manufacturing efficiency is improved; when the end face of each component is machined, the end face is ensured to be flat, and phenomena such as burrs and the like are avoided. The arc jump phenomenon during welding is avoided; and solve and need to pour the medium liquid that is packed in order to repair the welding seam and cause the waste of the medium, especially the liquid medium of gravity type heat pipe that the waste heat utilization of the corresponding boiler needs its very high price, so need to make quality guarantee and check work in order to prevent the waste of the medium more.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (9)
1. The gravity type heat pipe is characterized by comprising a steel pipe, an upper blocking plate, a lower blocking plate, a medium and an air extraction and material injection throwing head;
the upper blocking plate and the lower blocking plate are respectively arranged at two ends of the steel pipe and are in tight fit with the steel pipe; the upper blocking plate and the lower blocking plate are respectively provided with a vertical flanging, and the vertical flanging of the upper blocking plate is opposite to the vertical flanging of the lower blocking plate and faces outwards;
the upper plugging plate is provided with a root base hole, the root base hole is provided with a vertical flanging, the vertical flanging of the root base hole and the upper plugging plate are integrated, and the direction of the vertical flanging of the root base hole is opposite to the direction of the vertical flanging of the upper plugging plate;
the air extraction and material injection throwing head is arranged in the root base hole and is in tight fit with the root base hole; the air extraction and material injection throwing head comprises a plug;
the medium is filled in the steel pipe, the working temperature of the medium is 70-80 ℃, the medium is gas under the normal temperature condition, and the medium is liquid under the pressure condition;
the manufacturing method of the gravity type heat pipe comprises the following steps:
determining the outer diameters of an upper blocking plate and a lower blocking plate according to the inner diameter of a steel pipe, and respectively punching vertical flanging of the upper blocking plate and the lower blocking plate by using a first punching die;
punching a root base hole at the central part of the upper blocking plate by using a second punching die, and enabling the root base hole to have a vertical flanging with the opposite direction to the vertical flanging of the upper blocking plate;
the one-way valve is arranged in the air suction and material injection throwing head, and the two are connected through corresponding inner teeth and outer teeth;
the air-extracting and material-injecting head is arranged in the root base hole, the position on the flanging top of the root base hole is connected with the air-extracting and material-injecting head in a welding mode, and the axis of the air-extracting and material-injecting head is vertical to the end face of the vertical flanging of the root base hole;
the upper blocking plate and the lower blocking plate are arranged at two ends of the steel pipe, so that the vertical flanging of the upper blocking plate is opposite to the vertical flanging of the lower blocking plate and faces outwards, and the vertical flanging of the upper blocking plate and the vertical flanging of the lower blocking plate are connected with each other on top of heads at the two ends in a welding mode;
the outer teeth of the air extraction and material injection throwing head are connected with the inner teeth of the air extraction and material injection system to start an air extraction vacuum pump, so that the inside of the steel pipe is pumped into a certain negative pressure value;
injecting a quantitative medium into the steel pipe; the working temperature of the medium is 70-80 ℃, the medium is gas under the condition of normal temperature, and the medium is liquid under the condition of pressure;
and inserting a plug of the air-extracting and material-injecting throwing head, and welding the plug in the air-extracting and material-injecting throwing head in a welding mode.
2. The gravity fed heat pipe of claim 1, wherein the suction and injection whip head comprises: a one-way valve and an inner tooth; the one-way valve is provided with outer teeth and side seals, and the outer teeth of the one-way valve are matched with the inner teeth of the air suction and material injection swing head and the side seals in an airtight mode.
3. The gravity fed heat pipe of claim 2 wherein the suction and injection slinger further comprises: an outer tooth; the outer teeth of the air extraction and material injection throwing head are matched with the inner teeth of the air extraction and material injection system in a way that air cannot leak.
4. The gravity assisted heat pipe of claim 1, wherein the method of manufacturing further comprises: the check valve is arranged in the air suction and material injection throwing head, and after the check valve and the air suction and material injection throwing head are connected through corresponding inner teeth and outer teeth, the air tightness of the check valve, the corresponding inner teeth and outer teeth in the air suction and material injection throwing head and the matching of side sealing are required to be checked; if the air tightness is not qualified, the product cannot be used; and if the air tightness is qualified, installing the air suction material injection throwing head in the root base hole.
5. The gravity assisted heat pipe of claim 1, wherein the method of manufacturing further comprises: the air extraction and material injection throwing head is arranged in the root base hole, and after the position of the flanging top of the root base hole is connected with the air extraction and material injection throwing head in a welding mode, the air tightness of a welding joint of the air extraction and material injection throwing head and the root base hole is required to be checked; if the weld joint is unqualified, the weld joint cannot be used, and a leakage point is found out to repair the welding leakage point again so as to prevent the leakage of the gas, and the weld joint is regarded as qualified; and if the air tightness is qualified, installing the upper blocking plate and the lower blocking plate which contain the air extraction and material injection throwing heads at two ends of the steel pipe.
6. The gravity assisted heat pipe of claim 1, wherein the method of manufacturing further comprises: the upper blocking plate and the lower blocking plate are arranged at two ends of the steel pipe, the vertical flanges of the upper blocking plate are opposite to the vertical flanges of the lower blocking plate and face outwards, and after the upper blocking plate and the lower blocking plate are connected with the tops of the two ends in a welding mode, the air tightness of the welding joints of the upper blocking plate and the lower blocking plate and the steel pipe respectively needs to be checked; if the air tightness is unqualified, finding out the leakage point, and re-testing the leakage point by repairing welding to see whether the leakage point is still leaked or not, wherein the leakage point is qualified only when the leakage point is not leaked; and if the air tightness is qualified, starting a suction vacuum pump to vacuumize through the connection of the outer teeth of the suction material injection throwing head and the inner teeth of the suction material injection system.
7. The gravity assisted heat pipe of claim 1, wherein the method of manufacturing further comprises: after the quantitative medium is injected into the steel pipe, whether the valve core of the one-way valve returns accurately after the medium is injected is checked to ensure that the medium is not leaked, and if the medium leaks, the valve core position is readjusted to ensure that the valve core returns to be airtight; if the medium does not leak, a plug for exhausting, injecting and throwing the material is inserted.
8. The gravity assisted heat pipe of claim 1, wherein the method of manufacturing further comprises: the plug inserted with the air-extracting and material-injecting head is welded to be dead in the air-extracting and material-injecting head in a welding mode, and then the welding tightness between the air-extracting and material-injecting head and the plug is required to be checked; if the air tightness is unqualified, finding out leakage points, repairing and welding again, and then performing a test to see whether leakage points exist or not, and finally, judging whether the leakage points exist or not; and if the air tightness is qualified, obtaining the qualified gravity type heat pipe.
9. A boiler comprising the gravity fed heat pipe of any of claims 1-3.
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| US6986383B2 (en) * | 2004-03-30 | 2006-01-17 | Hul-Chun Hsu | End surface structure of a heat pipe for contact with a heat source |
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| CN113357947A (en) | 2021-09-07 |
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