Green manufacturing method for high-efficiency long heat pipe with ultra-large flow rate and high-efficiency long heat pipe

Abstract

The present invention discloses a green manufacturing method for a high-efficiency long heat pipe with ultra-large flow rate and a high-efficiency long heat pipe, and the manufacturing method includes pretreatment, strengthening treatment, assembly, chemical treatment, filling of working medium and vacuum creation. The assembly is to sleeve the outer tube outside the inner tube, set a sleeve flexible leg between the inner tube and the outer tube, and set an auxiliary tube at the two ends of the outer tube. The auxiliary tube is connected to the heat exchange cavity between the outer wall of the inner tube and the inner wall of the outer tube. The chemical treatment is to connect multiple heat pipe bodies in sequence through auxiliary tubes, and use the auxiliary tubes to pass chemical agents into the heat exchange cavity of the first heat pipe body, and the chemical agents can be circulated in the heat exchange cavity of the connected multiple heat pipe bodies. Finally, the working medium is filled into the heat exchange cavity or vacuum is drawn through two auxiliary tubes. The manufacturing method can improve the manufacturing efficiency of the heat pipe, and the manufacturing process is green and environmentally friendly, and can realize the manufacturing of high-efficiency long heat pipes, meet the structural strength requirements and the heat exchange requirements of fluids with ultra-large flow rates.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pipes, and in particular to a green manufacturing method for a high-efficiency long heat pipe with ultra-large flow rate and a high-efficiency long heat pipe. Background Art

[0002] In order to reduce the exhaust temperature, reduce exhaust losses, improve the thermal efficiency of the device, and ensure the safe and stable operation of the heat exchange device, the radial heat pipes of the heat pipe low-temperature economizer currently used can only be 3m to 5m long due to structural constraints and other reasons, which cannot meet the needs of large-scale and large-flow equipment. In addition, the manufacturing process also has various problems such as high energy consumption and sewage discharge, making it difficult to meet the increasingly stringent energy-saving and emission reduction indicators. In addition, although the expansion problem of super-long heat pipes can be solved by setting expansion joints and other structures, it will make the heat pipe structure complicated and difficult to use for a long time.

[0003] Therefore, there is an urgent need for a green manufacturing method for a high-efficiency long heat pipe with ultra-large flow and a high-efficiency long heat pipe to solve the above problems. Summary of the invention

[0004] One object of the present invention is to provide a green manufacturing method for a high-efficiency long heat pipe with ultra-large flow rate, which can not only meet the structural strength requirements of the high-efficiency long heat pipe and the high-efficiency heat exchange requirements of the fluid with ultra-large flow rate, but also the manufacturing process is green and environmentally friendly.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] Provided is a green manufacturing method for a high-efficiency long heat pipe with ultra-large flow, comprising the following steps:

[0007] Pretreatment: manufacturing the inner tube and the outer tube according to their design dimensions, and performing decontamination and rust removal treatment on the surfaces of the inner tube and the outer tube;

[0008] Strengthening treatment: a heat transfer structure is arranged on the inner wall and / or outer wall of the inner tube, and the inner tube is annealed; a fin structure is arranged on the outer wall of the outer tube;

[0009] Assembly: The outer tube is sleeved outside the inner tube, and a sleeve flexible leg is arranged between the inner tube and the outer tube, the sleeve portion of the sleeve flexible leg is interference fit with the outer wall of the inner tube, and the leg portion of the sleeve flexible leg abuts against the inner wall of the outer tube; a seal is welded at both ends of the outer tube, and both ends of the inner tube pass through the seal and extend out of the outer tube to form a heat pipe body, and a heat exchange cavity is formed between the outer wall of the inner tube and the inner wall of the outer tube; auxiliary tubes are arranged on the two seals, and the auxiliary tubes are connected with the heat exchange cavity;

[0010] Chemical treatment: multiple heat pipe bodies are connected in sequence through the auxiliary pipe, and the chemical agent is introduced into the heat exchange cavity of the first heat pipe body by using the auxiliary pipe, and the chemical agent is used to circulate in the heat exchange cavity of multiple heat pipe bodies;

[0011] Filling the working fluid and creating a vacuum: evacuating the heat exchange cavity through the two auxiliary tubes, and after reaching a predetermined vacuum degree in the heat exchange cavity, filling the heat exchange cavity with working fluid through the two auxiliary tubes, and after the predetermined amount of working fluid is filled in the heat exchange cavity, plugging the two auxiliary tubes to seal the heat exchange cavity to form a high-efficiency long heat pipe; or,

[0012] The working medium is filled into the heat exchange cavity through the two auxiliary tubes. After a predetermined amount of working medium is filled into the heat exchange cavity, one of the auxiliary tubes is blocked, and exhaust is performed through the other auxiliary tube to make the heat exchange cavity reach a predetermined vacuum degree, and then the other auxiliary tube is blocked to seal the heat exchange cavity to form a high-efficiency long heat pipe.

[0013] Optionally, in the chemical treatment step, the heat pipe body is rotated to allow chemicals to flow through various locations on the inner wall of the heat exchange cavity.

[0014] Optionally, in the chemical treatment step, the number of cycles of the chemical treatment is 1 to 5 times, the total treatment time is 5 min to 30 min, and the heat exchange chamber is flushed with clean water after the chemical treatment step.

[0015] Optionally, in the chemical treatment step, one of the two auxiliary pipes is a liquid inlet pipe and the other is a liquid discharge pipe, a plurality of the heat pipe bodies are connected in sequence, and the liquid discharge pipe of the previous heat pipe body is connected to the liquid inlet pipe of the next heat pipe body through a first hose, and the liquid discharge pipe of the last heat pipe body is connected to the liquid inlet pipe of the first heat pipe body through a second hose, and a chemical pump is arranged on the second hose.

[0016] Optionally, a medicine storage tank is also provided on the second hose, and the medicine storage tank is used to store chemical agents.

[0017] Optionally, in the assembling step, the sleeve flexible legs are provided with one or more;

[0018] When a plurality of the sleeve flexible legs are provided, the plurality of the sleeve flexible legs are sleeved on the inner tube at intervals along the axial direction of the inner tube, and the interval distance between two adjacent sleeve flexible legs is L1, 1.5m≤L1≤2.5m.

[0019] Optionally, in the assembly step, the sleeve flexible leg includes a sleeve portion and a leg portion, the leg portion includes a plurality of flexible legs, the plurality of flexible legs are arranged on the sleeve portion at intervals along the circumference of the sleeve portion, and the length of the sleeve portion along the axial direction of the inner tube is L2, 15mm≤L2≤30mm.

[0020] Optionally, the flexible legs are straight legs and / or corrugated legs.

[0021] Optionally, in the assembling step, at least one of the heads is a curved head.

[0022] Another object of the present invention is to provide a high-efficiency long heat pipe that can meet the structural strength requirements of the high-efficiency long heat pipe and the high-efficiency heat exchange requirements of a fluid with an ultra-large flow rate and has a simple structure.

[0023] Provided is a high-efficiency long heat pipe, comprising an inner pipe, an outer pipe, a sleeve flexible leg and a sealing head arranged at both ends of the outer pipe;

[0024] The outer tube is sleeved on the outside of the inner tube, the flexible legs of the sleeve are arranged between the inner tube and the outer tube, the end cap is sealed at both ends of the outer tube, at least one of the end caps is a curved end cap, and the two ends of the inner tube pass through the end cap and extend out of the outer tube.

[0025] The beneficial effects of the present invention are:

[0026] The green manufacturing method for high-efficiency long heat pipes with ultra-large flow proposed by the present invention includes the following steps: pretreatment, i.e. manufacturing the inner tube and the outer tube according to the design dimensions of the inner tube and the outer tube, and performing a decontamination and rust removal treatment on the surfaces of the inner tube and the outer tube. Strengthening treatment, i.e. arranging a heat transfer structure on the inner wall and / or the outer wall of the inner tube, and performing an annealing treatment on the inner tube; arranging a fin structure on the outer wall of the outer tube. Assembly, i.e. sleeve flexible legs are sleeved on the inner tube, the sleeve flexible legs are interference fit with the outer wall of the inner tube, and the outer tube is sleeved on the inner tube so that the legs of the sleeve flexible legs abut against the inner wall of the outer tube; welding heads at both ends of the outer tube, and the two ends of the inner tube pass through the heads and extend out of the outer tube to form a heat pipe body, and a heat exchange cavity is formed between the outer wall of the inner tube and the inner wall of the outer tube; auxiliary tubes are arranged on both heads, and the auxiliary tubes are connected to the heat exchange cavity. Chemical treatment, that is, multiple heat pipe bodies are connected in sequence through auxiliary tubes, and the chemical agent is passed into the heat exchange cavity of the first heat pipe body through the auxiliary tube, and the chemical agent can circulate in the heat exchange cavity of the connected multiple heat pipe bodies. Filling the working fluid and creating a vacuum, that is, after completing the chemical treatment, the heat exchange cavity can be evacuated through two auxiliary tubes, and after the heat exchange cavity reaches a predetermined vacuum degree, the working fluid is filled into the heat exchange cavity through the two auxiliary tubes, and after the heat exchange cavity is filled with a predetermined amount of working fluid, the two auxiliary tubes are blocked to seal the heat exchange cavity to form a high-efficiency long heat pipe. Alternatively, the working fluid is filled into the heat exchange cavity through two auxiliary tubes, and after the heat exchange cavity is filled with a predetermined amount of working fluid, one auxiliary tube is blocked, and the air is exhausted through the other auxiliary tube to make the heat exchange cavity reach a predetermined vacuum degree, and then the other auxiliary tube is blocked to seal the heat exchange cavity to form a high-efficiency long heat pipe.

[0027] The green manufacturing method for high-efficiency long heat pipes with ultra-large flow rates can realize the manufacturing of high-efficiency long heat pipes with a length of up to 15m, which can be applied to environments with ultra-large flue gas flow rates (flue gas flow rates of up to 1000000Nm 3 / h~3000000Nm 3 / h and above), the heat transfer structure arranged on the inner tube and the fin structure on the outer tube can ensure the heat exchange efficiency of the high-efficiency long heat pipe. By setting the sleeve flexible support leg to absorb the expansion of the inner tube, the vibration and other problems of the high-efficiency long heat pipe can be alleviated, and the stress caused by the ordinary welded support leg cannot be released, which leads to the risk of cracking and failure of the high-efficiency long heat pipe. At the same time, it can also provide mechanical support to ensure the structural strength requirements of the high-efficiency long heat pipe. In addition, the closed and cyclic chemical treatment in the manufacturing process of the high-efficiency long heat pipe can achieve environmental protection and energy saving in the manufacturing process. Compared with the traditional method of placing the heat pipe body in a chemical agent tank for chemical treatment, the cyclic chemical treatment method of the present invention can also save the requirements for the specifications of the chemical agent tank when the length of the heat pipe body is long, thereby reducing costs. In addition, in the steps of filling the working fluid and creating a vacuum, the two auxiliary tubes arranged on the heads at both ends can improve the efficiency of filling the working fluid and creating a vacuum, thereby further improving production efficiency.

[0028] The high-efficiency long heat pipe proposed in the present invention is manufactured by applying the above-mentioned green manufacturing method for high-efficiency long heat pipes with ultra-large flow. The high-efficiency long heat pipe includes an inner tube, an outer tube, a sleeve flexible leg and a head. The outer tube is sleeved on the outside of the inner tube, and the sleeve flexible leg is interference-sleeved on the inner tube and clamped between the outer wall of the inner tube and the inner wall of the outer tube. The head is sealed at both ends of the outer tube, and the two ends of the inner tube pass through the head and extend out of the outer tube. The length of the high-efficiency long heat pipe manufactured by the green manufacturing method for high-efficiency long heat pipes with ultra-large flow can reach 15m. The expansion problem of the ultra-long heat pipe can be solved by setting the sleeve flexible leg, and the structural strength requirements of the high-efficiency long heat pipe are guaranteed, and the structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flow chart of a green manufacturing method for a high-efficiency long heat pipe with ultra-large flow provided by an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of chemical treatment of a heat pipe body provided by an embodiment of the present invention;

[0031] Figure 3 is a partial cross-sectional view of a high-efficiency long heat pipe provided by an embodiment of the present invention from a first viewing angle;

[0032] Figure 4 is a partial cross-sectional view of a high-efficiency long heat pipe provided by an embodiment of the present invention from a second viewing angle (without the sleeve flexible legs);

[0033] Figure 5 is a partial cross-sectional view of a high-efficiency long heat pipe provided by an embodiment of the present invention from a second viewing angle (including straight legs);

[0034] Figure 6 is a partial cross-sectional view of a high-efficiency long heat pipe provided by an embodiment of the present invention from a second viewing angle (including corrugated legs);

[0035] Figure 7 It is a partial cross-sectional view of an inner tube provided by an embodiment of the present invention.

[0036] In the figure:

[0037] 10. High-efficiency long heat pipe; 20. Heat exchange chamber;

[0038] 1. Inner tube; 2. Outer tube; 3. End cap; 4. Sleeve flexible leg; 41. Sleeve part; 42. Leg part; 421. Straight leg; 422. Corrugated leg;

[0039] 101. internal heat transfer structure; 102. external heat transfer structure; 103. fin structure;

[0040] 201, auxiliary pipe; 202, first hose; 203, second hose; 204, medicine pump; 205, medicine storage tank. DETAILED DESCRIPTION

[0041] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0046] like Figures 1 to 7As shown, this embodiment provides a green manufacturing method for a high-efficiency long heat pipe with ultra-large flow, including pretreatment, strengthening treatment, assembly, chemical treatment, filling of working fluid and vacuum creation. Pretreatment, i.e. manufacturing the inner tube 1 and the outer tube 2 according to the design dimensions of the inner tube 1 and the outer tube 2, and performing a decontamination and rust removal treatment on the surfaces of the inner tube 1 and the outer tube 2. Strengthening treatment, i.e. setting a heat transfer structure on the inner wall and / or outer wall of the inner tube 1 to strengthen the heat transfer effect of the inner tube 1, and performing an annealing treatment on the inner tube 1 to eliminate the residual stress of the inner tube 1 and improve the mechanical properties of the inner tube 1. A fin structure 103 is provided on the outer wall of the outer tube 2 to strengthen the heat transfer effect of the outer tube 2.

[0047] Assembly, that is, sleeve flexible legs 4 are sleeved on the inner tube 1, sleeve flexible legs 4 are interference fit with the outer wall of the inner tube 1, and the outer tube 2 is sleeved on the inner tube 1 so that the leg portion 42 of the sleeve flexible legs 4 abuts against the inner wall of the outer tube 2, and the sleeve flexible legs 4 are sandwiched between the outer wall of the inner tube 1 and the inner wall of the outer tube 2, which can not only fix the relative position of the inner tube 1 and the outer tube 2, but also absorb the expansion of the inner tube 1, and ensure the performance of the high-efficiency long heat pipe 10. The sleeve flexible legs 4 and the inner tube 1 are fixed by interference fit instead of welding, which not only simplifies the assembly process of the sleeve flexible legs 4 and the inner tube 1, but also does not hinder the setting of the outer heat transfer structure 102 on the outer wall of the inner tube 1. Even if the sleeve flexible legs 4 are fixed at the outer heat transfer structure 102, it will not affect the connection stability between the sleeve flexible legs 4 and the inner tube 1. In addition, the assembly step also includes welding the end caps 3 at both ends of the outer tube 2, and the two ends of the inner tube 1 pass through the end caps 3 and extend out of the outer tube 2 to form a heat pipe body, and a heat exchange cavity 20 is formed between the outer wall of the inner tube 1 and the inner wall of the outer tube 2. The assembly step also includes arranging auxiliary tubes 201 on both end caps 3, and the auxiliary tubes 201 are connected to the heat exchange cavity 20. An auxiliary hole is reserved on the end cap 3, and the auxiliary tube 201 is inserted into the auxiliary hole and welded to the end cap 3. The material of the auxiliary tube 201 can be 304 stainless steel.

[0048] Chemical treatment, that is, multiple heat pipe bodies are connected in sequence through auxiliary pipes 201, and the auxiliary pipes 201 are used to pass the chemical agent into the heat exchange cavity 20 of the first heat pipe body. When the heat exchange cavities 20 of multiple heat pipe bodies are connected through the auxiliary pipes 201, the chemical agent can circulate in the heat exchange cavities 20 of the connected multiple heat pipe bodies. Compared with the prior art, in which the heat pipe body is placed in a chemical agent tank in an open environment for chemical treatment, this solution connects the heat pipe body end to end, and passes the chemical agent into the heat exchange cavity 20 of the heat pipe body, which can not only avoid the pollution of the environment and damage to the human body by the chemical agent in the open environment, but also the recycling of the chemical agent can reduce the amount of the chemical agent, so as to achieve energy saving and environmental protection in the chemical treatment process. In this embodiment, the chemical agent used in the chemical treatment step can be the chemical agent used in traditional chemical treatment. The chemical agents of this embodiment include acidic agents, alkaline agents and highly oxidizing agents. When performing chemical treatment, the acidic agents, alkaline agents and highly oxidizing agents need to be introduced into the heat exchange chamber 20 separately, and a water flushing step is added in the middle of each link to prevent different types of chemical agents from mixing in the heat exchange chamber 20.

[0049] Filling the working medium and creating a vacuum, that is, after the chemical treatment is completed, the heat exchange chamber 20 can be evacuated through the two auxiliary tubes 201, and after the heat exchange chamber 20 reaches a predetermined vacuum degree, the working medium is filled into the heat exchange chamber 20 through the two auxiliary tubes 201, and after the predetermined amount of working medium is filled into the heat exchange chamber 20, the two auxiliary tubes 201 are blocked to seal the heat exchange chamber 20 to form a high-efficiency long heat pipe 10; or, the working medium is filled into the heat exchange chamber 20 through the two auxiliary tubes 201, and after the predetermined amount of working medium is filled into the heat exchange chamber 20, one auxiliary tube 201 is blocked, and the heat exchange chamber 20 is exhausted through the other auxiliary tube 201 to reach a predetermined vacuum degree, and then the other auxiliary tube 201 is blocked to seal the heat exchange chamber 20 to form a high-efficiency long heat pipe 10. In specific implementation, the heat exchange chamber 20 can be heated so that the gas in the heat exchange chamber 20 is discharged through the other auxiliary tube 201, so that the heat exchange chamber 20 reaches a predetermined vacuum degree.

[0050] In specific implementation, the high-efficiency long heat pipe 10 needs to undergo a water bath performance test before leaving the factory to detect whether the high-efficiency long heat pipe 10 meets the manufacturing standard requirements. The high-efficiency long heat pipe 10 that passes the test can be packaged using a frame, etc., and the fin structure 103 can be calibrated.

[0051] The green manufacturing method for a high-efficiency long heat pipe with a large flow rate provided in this embodiment can realize the manufacturing of a high-efficiency long heat pipe 10. The length of the high-efficiency long heat pipe 10 can reach 15m, which is suitable for environments with a large flue gas flow rate (the flue gas flow rate can reach 1000000Nm 3 / h~3000000Nm 3 / h and above), the heat transfer structure arranged on the inner tube 1 and the fin structure 103 on the outer tube 2 can ensure the heat exchange efficiency of the high-efficiency long heat pipe 10. By setting the sleeve flexible leg 4 to absorb the expansion of the inner tube 1, the vibration and other problems of the high-efficiency long heat pipe 10 can be alleviated, and the stress caused by the ordinary welded legs cannot be released, which leads to the risk of cracking and failure of the high-efficiency long heat pipe 10. At the same time, it can also provide mechanical support to ensure the structural strength requirements of the high-efficiency long heat pipe 10. In addition, the closed and cyclic chemical treatment during the manufacturing process can achieve environmental protection and energy saving in the manufacturing process. Compared with the traditional method of placing the heat pipe body in a chemical agent tank for chemical treatment, the cyclic chemical treatment method used in this embodiment can also save the requirements for the specifications of the chemical agent tank when the length of the heat pipe body is long, thereby reducing costs. In addition, in the steps of filling the working fluid and creating a vacuum, the two auxiliary pipes 201 arranged on the heads 3 at both ends can improve the efficiency of filling the working fluid and creating a vacuum, and further improve production efficiency.

[0052] During specific implementation, in the pretreatment step, steel pipes can be used to manufacture the inner pipe 1 and the outer pipe 2, that is, the steel pipes are cut and blanked according to the design dimensions of the inner pipe 1 and the outer pipe 2, and the steel pipes need to be straightened before blanking, and the straightness tolerance needs to be less than 1mm / m. The two ends of the cut steel pipe need to be polished with grooves so that the end faces of the inner pipe 1 and the outer pipe 2 are perpendicular to their own axes and the deviation is within the range of ±0.5mm. In addition, existing mechanical and chemical methods are used to remove rust, scale and oil stains on the surface of the inner pipe 1 and the outer pipe 2, and the dust and gas generated by the treatment workshop are directly introduced into the exhaust gas treatment device and discharged after meeting the standards. In the chemical treatment step, the chemical agents also need to be post-treated after multiple cycles so that they can meet the emission requirements before being discharged.

[0053] In the specific implementation, in the strengthening treatment step, the heat transfer structure includes an inner heat transfer structure 101 and an outer heat transfer structure 102, wherein the inner heat transfer structure 101 is arranged on the inner wall of the inner tube 1, and the outer heat transfer structure 102 is arranged on the outer wall of the inner tube 1. The inner heat transfer structure 101 and the outer heat transfer structure 102 can be an inner wave outer thread structure, that is, a corrugation is arranged on the inner wall of the inner tube 1 so that the inner wall of the inner tube 1 has an inner groove, and a thread is arranged on the outer wall of the inner tube 1 so that the outer wall of the inner tube 1 has an outer groove. In addition, the fin structure 103 can be an H-shaped, nail head, blooming or other structure. The fin structure 103 can increase the heat dissipation area of ​​the outer tube 2 to enhance the heat transfer effect of the outer tube 2. The fusion degree of the fin structure 103 and the outer tube 2 is ≥98%, and the pull-off strength is ≥196Mpa to ensure the connection stability between the fin structure 103 and the outer tube 2.

[0054] Furthermore, in the chemical treatment step, the heat pipe body can be rotated so that the chemical agent can flow through the inner wall of the heat exchange chamber 20, so that the chemical agent can fully act in the heat exchange chamber 20 and ensure the effect of the chemical treatment of the inner wall of the heat exchange chamber 20.

[0055] Optionally, in the chemical treatment step, the number of chemical treatment cycles is 3 to 5 times, and the total treatment time is 5 to 30 minutes. After the chemical treatment step, the heat exchange chamber 20 needs to be flushed with clean water, that is, clean water is introduced into the heat exchange chamber 20 using the auxiliary pipe 201. The flow paths of clean water and chemical agents in the heat exchange chamber 20 of each heat pipe body are consistent.

[0056] like Figure 2 As shown, in the chemical treatment step, one of the two auxiliary tubes 201 on each heat pipe body is used for liquid inlet as a liquid inlet tube, and the other is used for liquid discharge as a liquid discharge tube. Multiple heat pipe bodies are connected in sequence, and the liquid discharge tube of the previous heat pipe body is connected to the liquid inlet tube of the next heat pipe body through the first hose 202, and the liquid discharge tube of the last heat pipe body is connected to the liquid inlet tube of the first heat pipe body through the second hose 203. In specific implementation, the fluid can enter the heat exchange cavity 20 of the first heat pipe body through the liquid inlet tube on the first heat pipe body, and then enter the heat exchange cavity 20 of the second heat pipe body through the liquid discharge tube on the first heat pipe body, the first hose 202 and the liquid inlet tube on the second heat pipe body, and so on, until it is discharged through the liquid discharge tube on the last heat pipe body, and re-enters the heat exchange cavity 20 of the first heat pipe body through the second hose 203 and the liquid inlet tube on the first heat pipe body for recycling. A medicine pump 204 is disposed on the second hose 203 , and the medicine pump 204 is used to provide power to the fluid flowing through the second hose 203 , so that the fluid can circulate in the above-mentioned circuit at a predetermined flow rate.

[0057] like Figure 2 As shown, a medicine storage tank 205 is also provided on the second hose 203. That is, after the chemical treatment step is completed, or after one cycle of chemical treatment, the chemical agent can be temporarily stored in the medicine storage tank 205, and then the agent pump 204 is turned on again as needed or after a preset interval, so that the chemical agent re-enters the heat exchange chamber 20 for circulation.

[0058] Furthermore, in the assembly step, the sleeve flexible legs 4 have one or more, and when there are multiple sleeve flexible legs 4, multiple sleeve flexible legs 4 are sleeved on the inner tube 1 along the axial direction of the inner tube 1, and the spacing distance between two adjacent sleeve flexible legs 4 is L1, 1.5m≤L1≤2.5m. The traditional rigid legs are made of carbon steel or stainless steel. In order to achieve the fixation of the rigid legs and the inner tube 1 and the outer tube 2, welding is required. The rigid legs that cannot be welded are also in rigid contact with the inner wall of the outer tube 2. In the operation of the high-efficiency long heat pipe 10, the inner wall of the outer tube 2 is very easy to be damaged, affecting the performance of the high-efficiency long heat pipe 10. The sleeve flexible legs 4 used in this embodiment can not only meet the expansion needs of the inner tube 1, but also absorb the displacement and force applied to the legs during the vibration of the high-efficiency long heat pipe 10, which can avoid damage to the outer wall of the inner tube 1 and the inner wall of the outer tube 2, and eliminate the risk of cracking and failure of the high-efficiency long heat pipe 10.

[0059] Optionally, in the assembly step, the sleeve flexible leg 4 includes a sleeve portion 41 and a leg portion 42, the leg portion 42 includes a plurality of flexible legs, and the plurality of flexible legs are arranged on the sleeve portion 41 at intervals along the circumference of the sleeve portion 41, and the length of the sleeve portion 41 in the axial direction of the inner tube 1 is L2, 15mm≤L2≤30mm. In specific implementation, the flexible legs are arranged along the annular direction (or circumferential direction) of the sleeve portion 41, and one or more may be arranged, and may be evenly distributed in the circumferential direction of the inner tube 1. The sleeve flexible leg 4 and the inner tube 1 are interference fit instead of welding, and the relative position of the inner tube 1 and the outer tube 2 can be positioned and the expansion of the inner tube 1 can be absorbed, thereby ensuring the performance of the high-efficiency long heat pipe 10. The length of the sleeve portion 41 is 15 mm to 30 mm. When the sleeve portion 41 and the inner tube 1 are interference fit, the friction between the two can be increased to prevent the sleeve portion 41 from moving in the working state. The length of the sleeve portion 41 is generally greater than the width of the outer groove of the outer heat transfer structure 102, which can effectively prevent the sleeve portion 41 from falling into the outer groove, thereby ensuring the stability of the installation of the sleeve flexible leg 4. In this embodiment, the leg portion 42 includes three flexible legs, which are evenly spaced, and the angle between two adjacent flexible legs in the circumferential direction of the inner tube 1 is 120°. Preferably, the sleeve flexible leg 4 can be made of materials such as ceramics, fluoroplastics or rubber, and different materials can be used according to the use temperature of the high-efficiency long heat pipe 10.

[0060] Alternatively, if Figure 5 and Figure 6 As shown, the flexible leg can be a straight leg 421. Further, the flexible leg can also be a corrugated leg 422. Both structures of the flexible legs can realize the positioning of the relative positions of the inner tube 1 and the outer tube 2. Further, the corrugated leg 422 can better absorb the force applied to the leg portion 42 by the inner tube 1 and the outer tube 2.

[0061] Optionally, in the assembly step, at least one of the end caps 3 is a curved end cap, which can also improve the effect of absorbing the thermal stress caused by the temperature difference of the high-efficiency long heat pipe 10 compared with the flat end cap. The curved end cap can be a bowl-shaped end cap, a cap-shaped end cap, or an elliptical end cap. The end caps 3 at both ends of the high-efficiency long heat pipe 10 can be curved end caps, or one flat end cap and one curved end cap. In specific implementation, the end cap 3 is welded and fixed to the outer tube 2, and the welding can be argon arc welding.

[0062] This embodiment also provides a high-efficiency long heat pipe 10, which is manufactured by applying the above-mentioned green manufacturing method for high-efficiency long heat pipes with ultra-large flow rates. The high-efficiency long heat pipe 10 includes an inner tube 1, an outer tube 2, a sleeve flexible leg 4 and a head 3. The outer tube 2 is sleeved on the outer side of the inner tube 1, and the sleeve flexible leg 4 is interference sleeved on the inner tube 1 and clamped between the outer wall of the inner tube 1 and the inner wall of the outer tube 2. The head 3 is sealed at both ends of the outer tube 2, and both ends of the inner tube 1 pass through the head 3 and extend out of the outer tube 2. The length of the high-efficiency long heat pipe 10 manufactured by applying the above-mentioned green manufacturing method for high-efficiency long heat pipes with ultra-large flow rates can reach 15m, and the structural strength requirements of the high-efficiency long heat pipe 10 can be guaranteed by setting the sleeve flexible leg 4.

[0063] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A green manufacturing method for high-efficiency long heat pipes with ultra-large flow rates, characterized in that: The steps include: Pretreatment: manufacturing the inner tube (1) and the outer tube (2) according to the design dimensions of the inner tube (1) and the outer tube (2), and performing a decontamination and rust removal treatment on the surfaces of the inner tube (1) and the outer tube (2); Strengthening treatment: arranging a heat transfer structure on the inner wall and / or outer wall of the inner tube (1), and performing an annealing treatment on the inner tube (1); arranging a fin structure (103) on the outer wall of the outer tube (2); Assembly: the outer tube (2) is sleeved outside the inner tube (1), a sleeve flexible leg (4) is provided between the inner tube (1) and the outer tube (2), the sleeve portion (41) of the sleeve flexible leg (4) is interference fit with the outer wall of the inner tube (1), and the leg portion (42) of the sleeve flexible leg (4) abuts against the inner wall of the outer tube (2); a seal (3) is welded at both ends of the outer tube (2), both ends of the inner tube (1) pass through the seal (3) and extend out of the outer tube (2) to form a heat pipe body, and a heat exchange cavity (20) is formed between the outer wall of the inner tube (1) and the inner wall of the outer tube (2); an auxiliary tube (201) is provided on both of the seals (3), and the auxiliary tube (201) is communicated with the heat exchange cavity (20); Chemical treatment: a plurality of the heat pipe bodies are connected in sequence via the auxiliary pipe (201), and a chemical agent is introduced into the heat exchange cavity (20) of the first heat pipe body by using the auxiliary pipe (201), and the chemical agent is used to circulate in the heat exchange cavity (20) of the plurality of heat pipe bodies; Filling the working medium and creating a vacuum: evacuating the heat exchange chamber (20) through the two auxiliary tubes (201); after a predetermined vacuum degree is reached in the heat exchange chamber (20), filling the heat exchange chamber (20) with working medium through the two auxiliary tubes (201); and after a predetermined amount of working medium is filled in the heat exchange chamber (20), the two auxiliary tubes (201) are sealed to seal the heat exchange chamber (20) to form a high-efficiency long heat pipe (10); or, The heat exchange chamber (20) is filled with working fluid through the two auxiliary tubes (201); after a predetermined amount of working fluid is filled in the heat exchange chamber (20), one of the auxiliary tubes (201) is blocked, and exhaust is conducted through the other auxiliary tube (201) to achieve a predetermined vacuum degree in the heat exchange chamber (20); and then the other auxiliary tube (201) is blocked to seal the heat exchange chamber (20) to form a high-efficiency long heat pipe (10).

2. The green manufacturing method according to claim 1, characterized in that: In the chemical treatment step, the heat pipe body is rotated to allow the chemical agent to flow through various locations on the inner wall of the heat exchange cavity (20).

3. The green manufacturing method according to claim 1, characterized in that: In the chemical treatment step, the number of cycles of the chemical treatment is 1 to 5 times, the total treatment time is 5 to 30 minutes, and after the chemical treatment step, the heat exchange chamber (20) is flushed with clean water.

4. The green manufacturing method according to claim 1, characterized in that: In the chemical treatment step, one of the two auxiliary pipes (201) is a liquid inlet pipe and the other is a liquid discharge pipe, and the plurality of heat pipe bodies are connected in sequence, and the liquid discharge pipe of the previous heat pipe body is connected to the liquid inlet pipe of the next heat pipe body via a first hose (202), and the liquid discharge pipe of the last heat pipe body is connected to the liquid inlet pipe of the first heat pipe body via a second hose (203), and a chemical pump (204) is provided on the second hose (203).

5. The green manufacturing method according to claim 4, characterized in that: A medicine storage tank (205) is also provided on the second hose (203), and the medicine storage tank (205) is used to store chemical agents.

6. The green manufacturing method according to claim 1, characterized in that: In the assembling step, one or more flexible legs (4) of the sleeve are provided; When a plurality of the sleeve flexible legs (4) are provided, the plurality of sleeve flexible legs (4) are sleeved on the inner tube (1) at intervals along the axial direction of the inner tube (1), and the interval between two adjacent sleeve flexible legs (4) is L1, 1.5m≤L1≤2.5m.

7. The green manufacturing method according to claim 1, characterized in that: In the assembling step, the sleeve flexible leg (4) comprises a sleeve portion (41) and a leg portion (42), the leg portion (42) comprises a plurality of flexible legs, the plurality of flexible legs are arranged on the sleeve portion (41) at intervals along the circumference of the sleeve portion (41), and the length of the sleeve portion (41) in the axial direction of the inner tube (1) is L2, 15 mm ≤ L2 ≤ 30 mm.

8. The green manufacturing method according to claim 7, characterized in that: The flexible legs are straight legs (421) and / or corrugated legs (422).

9. The green manufacturing method according to any one of claims 1 to 8, characterized in that: In the assembling step, at least one of the sealing heads (3) is a curved sealing head.

10. High-efficiency long heat pipe, characterized in that: It comprises an inner tube (1), an outer tube (2), a sleeve flexible leg (4), and a sealing head (3) arranged at both ends of the outer tube (2); The outer tube (2) is sleeved on the outer side of the inner tube (1), the sleeve flexible legs (4) are arranged between the inner tube (1) and the outer tube (2), the sealing head (3) is sealed at both ends of the outer tube (2), at least one of the sealing heads (3) is a curved surface sealing head, and both ends of the inner tube (1) pass through the sealing head (3) and extend out of the outer tube (2).

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