A multi-stage powder-filled heat pipe and intelligent manufacturing method and equipment thereof

Abstract

The present invention discloses a multi-section powder-filled heat pipe and its intelligent manufacturing method and equipment, wherein the method comprises: obtaining a cutting coefficient, wherein the cutting coefficient at least includes the number of first sub-tube segments and the length of each first sub-tube segment; after selecting the corresponding raw material base tube according to the type of powder required for each first sub-tube segment, according to the cutting coefficient, controlling the cutting device to cut the raw material base tube to obtain a plurality of first sub-tube segments; controlling the discharging device to sequentially splice and nest the plurality of first sub-tube segments into the first base tube to obtain a second tube segment; controlling the liquid injection head device to perform liquid injection head treatment on the second tube segment. By using the method of the present application, the heat dissipation performance of the heat pipe can be further improved, and the preparation and processing efficiency can be improved.

Description

Technical Field

[0001] The present application relates to heat pipe preparation technology, in particular to a multi-stage powder-filled heat pipe and its intelligent manufacturing method and equipment. Background Art

[0002] With the increasing development and rapid improvement of AI and cloud service technologies, higher requirements are placed on the heat dissipation capacity of servers in data centers. Because the speed of computing and processing per second is very fast, the heat generated is getting bigger and bigger, so the heat dissipation demand of high-end servers is also getting bigger and bigger, and the heat dissipation requirements are getting higher and higher, which leads to higher and higher performance requirements for heat pipes. As for the currently commonly used heat pipes, they are mainly realized by a single groove + single powder structure. Although it fully utilizes the permeability of the groove structure and the efficient thermal conductivity of the powder to achieve the effect of timely exporting the heat generated by the chip on the server by the heat pipe, however, the heat transfer performance of such heat pipes can no longer meet the high demand for heat dissipation performance of current servers. Therefore, a design method that can improve the heat transfer performance of heat pipes is one of the technical problems that need to be solved urgently. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a multi-stage powder-filled heat pipe and an intelligent manufacturing method and equipment thereof, which can make the manufactured heat pipe have higher heat transfer performance to meet the needs of high-end equipment with high heat dissipation requirements.

[0004] In a first aspect, an embodiment of the present application provides a method for intelligently manufacturing a heat pipe with multi-stage powder filling, the method comprising the following steps:

[0005] S1. Obtaining a cutting coefficient, wherein the cutting coefficient at least includes the number of first sub-segments and the length of each first sub-segment;

[0006] S2. After selecting a corresponding raw material base tube according to the type of powder required for each first sub-tube segment, controlling a cutting device to cut the raw material base tube according to the cutting coefficient to obtain a plurality of first sub-tube segments, wherein the raw material base tube is a base tube having grooves and a powder structure layer;

[0007] S3, controlling the discharging device to sequentially splice a plurality of first sub-tube segments and then embed them into the first base tube to obtain a second tube segment, wherein the raw material base tube and the first base tube are of different material types;

[0008] S4, controlling the liquid injection head sealing device to perform liquid injection head sealing processing on the second pipe section.

[0009] In one embodiment, the cutting coefficient further includes position information of the first sub-segment, and the step S2 specifically includes:

[0010] S201, determining a cutting method corresponding to two ends of the first sub-segment according to position information of the first sub-segment, wherein the cutting method is determined according to an alignment structure between two first sub-segments located at adjacent positions;

[0011] S202, according to the cutting method at both ends of the first sub-segment, the length and the number of the first sub-segments, control the cutting device to cut the raw material base pipe to obtain a plurality of first sub-segments.

[0012] In one embodiment, the alignment structure is a concave-convex alignment structure, one end of one of the two first sub-tube segments located at adjacent positions has a protrusion, and one end of the other of the two first sub-tube segments located at adjacent positions has a groove matching the protrusion;

[0013] And / or, the alignment structure is a bevel alignment structure, one end of one of the two first sub-tube segments located at adjacent positions has a first bevel, and one end of the other first sub-tube segment located at adjacent positions has a second bevel matching the first bevel.

[0014] In one embodiment, the step S3 of sequentially splicing a plurality of first sub-pipe segments specifically includes:

[0015] S301, rotating at least one of the two first sub-tube segments located at adjacent positions to align the protrusion with the groove and / or align the first inclined surface with the second inclined surface, and splicing the two first sub-tube segments located at adjacent positions.

[0016] In one embodiment, the step S301 specifically includes:

[0017] S3011, rotating at least one of two first sub-tube segments located at adjacent positions, and moving the two first sub-tube segments located at adjacent positions toward each other;

[0018] S3012, after at least one first sub-segment rotates at least one circle, determining whether there is a gap between two first sub-segments located at adjacent positions;

[0019] S3013, when it is determined that there is no gap between the two first sub-pipe segments at adjacent positions, it is determined that the two first sub-pipe segments at adjacent positions are successfully spliced;

[0020] S3014. When it is determined that there is a gap between two first sub-pipe sections at adjacent positions, it is determined that the splicing between the two first sub-pipe sections at adjacent positions has failed, and a warning message is issued.

[0021] In one embodiment, the step S301 further specifically includes:

[0022] S3015, when it is determined that there is a gap between two first sub-pipe segments at adjacent positions, determining whether a shape of the gap formed by the first inclined surface and the second inclined surface is the same as a preset shape;

[0023] S3016, when it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is the same as the preset shape, it is determined that the two first sub-pipe segments located at adjacent positions are successfully spliced;

[0024] S3017: When it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is different from the preset shape, it is determined that the splicing between the two first sub-pipe sections located at adjacent positions has failed, and a warning message is issued.

[0025] In one embodiment, step S3 further specifically includes:

[0026] S3018. When it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is the same as the preset shape, the rear first sub-tube segment of the two adjacent first sub-tube segments is pushed toward the front first sub-tube segment in the first base tube to make the first inclined surface fit with the second inclined surface, thereby achieving bending and splicing of the first base tube.

[0027] In one embodiment, the size of powder particles filled in the first sub-tube segment corresponding to the heat source concentration area among the plurality of first sub-tube segments is the largest; the alignment structures between two first sub-tube segments located at different adjacent positions are different; and the grooves provided in at least two of the plurality of first sub-tube segments are different.

[0028] In a second aspect, an embodiment of the present application provides a multi-stage powder-filled heat pipe intelligent manufacturing device, wherein the device comprises:

[0029] A cutting device, used for cutting the raw material base pipe to obtain a plurality of first sub-pipe sections;

[0030] A discharging device is used to sequentially splice a plurality of first sub-pipe sections and then nest them into the first base pipe to obtain a second pipe section;

[0031] A liquid injection head sealing device, used for performing liquid injection head sealing treatment on the second pipe section;

[0032] A control processing device, comprising at least one processor, for executing the steps of implementing the above-mentioned method for intelligent manufacturing of a heat pipe with multi-stage powder filling;

[0033] The control processing device is respectively connected to the cutting device, the discharging device and the liquid injection head device for communication.

[0034] In a third aspect, an embodiment of the present application provides a multi-section powder-filled heat pipe, which is manufactured by the steps of a multi-section powder-filled heat pipe intelligent manufacturing method provided in the first aspect above.

[0035] The present application can achieve at least one of the following technical effects: the present application selects the raw material base tube according to the type of powder required for each sub-tube segment, wherein the raw material base tube is a base tube that has been pre-filled with powder, and the powder particle sizes of different raw material base tubes are different, and then the selected raw material base tube is cut to a corresponding length according to the cutting coefficient to obtain a number of first sub-tube segments, so that the powder particle sizes of different first sub-tube segments are different, and then the several first sub-tube segments are spliced ​​and nested into the first base tube, and finally the liquid injection and head treatment are performed. It can be seen that the heat pipe prepared in this way has a multi-section powder structure with different particle sizes, which can produce more pores and enhance the heat transfer performance of the heat pipe; and, compared with each preparation process, which requires a base tube to be filled with powder one by one, the present application directly selects the base tube that has been pre-filled with powder structure to cut and use as needed, thereby realizing the preparation of a heat pipe with multi-section powder filling, which can improve the preparation efficiency and greatly save preparation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a structural schematic diagram of a multi-stage powder-filled heat pipe intelligent manufacturing device according to an embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of the steps of a method for intelligently manufacturing a heat pipe with multi-stage powder filling according to an embodiment of the present application;

[0039] Figure 3 A schematic diagram comparing different groove shapes and sizes in the embodiments of the present application;

[0040] Figure 4 A schematic diagram of an alignment structure according to an embodiment of the present application;

[0041] Figure 5 is a schematic diagram of the shape of the gap formed between the first inclined surface and the second inclined surface;

[0042] Figure 6 A schematic diagram of preparing the first substrate to achieve bending deformation;

[0043] Figure 7 Schematic diagram of the heat pipe structure prepared;

[0044] Figure 8 is a schematic cross-sectional view of the heating zone of the prepared heat pipe;

[0045] Fig. 9 This is a schematic structural diagram of an embodiment of a heat pipe before liquid injection operation;

[0046] Fig.10 is a schematic structural diagram of a first end surface of a sealing body;

[0047] Fig.11 is a schematic cross-sectional view of a first end surface of a sealing body;

[0048] Fig.12 It is a schematic diagram of the dynamic changes before and after the sealing body is punctured. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described through the implementation method with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0050] For the currently commonly used heat pipes, they are mainly implemented by a single groove + single powder structure. Although they fully utilize the permeability of the groove structure and the efficient thermal conductivity of the powder to achieve the heat dissipation of the chip / server. However, with the rapid development of technology, the computing speed of chips / servers is getting faster and faster, and the heat generated is also getting bigger and bigger. Therefore, the currently commonly used heat pipes are gradually unable to meet the high demand for heat dissipation performance of these high-end devices. For this reason, research and design are carried out to improve the heat dissipation performance of heat pipes.

[0051] During the research and design process, it was found that setting at least two sub-areas filled with powders of different particle sizes in the heating area of ​​the heat pipe can improve the porosity and conductivity of the heat pipe, thereby greatly improving the heat dissipation performance of the heat pipe. Therefore, the embodiment of the present application provides a multi-section powder-filled heat pipe and an intelligent manufacturing method and device thereof.

[0052] Reference Figure 1 A multi-stage powder-filled heat pipe intelligent manufacturing device includes a cutting device, a discharging device, a liquid injection head device and a control processing device, wherein the control processing device is respectively connected to the cutting device, the discharging device and the liquid injection head device in communication. Their specific descriptions are as follows.

[0053] The cutting device is mainly used to cut the raw material base pipe to obtain a plurality of first sub-pipe segments. Specifically, the cutting device at least includes a cutting knife, a rotating mechanism that can rotate the cutting knife, and a moving mechanism that can move the cutting knife (the movement mainly includes up, down, left, and right movement). By controlling the rotating mechanism to rotate the cutting knife at different angles, the cut pipe segment can have inclined surfaces with different slopes; and by controlling the moving trajectory of the moving mechanism, the cutting knife can be cut according to a preset knife path, so that the cut surface of the pipe segment can have different shapes, for example, the cut surface can have protrusions and / or grooves of different shapes.

[0054] The discharge device is mainly used to sequentially splice a plurality of first sub-tube segments and then insert them into the first base tube to obtain the second tube segment. Specifically, the discharge device mainly determines the splicing order of the first sub-tube segments according to the required setting position of each first sub-tube segment in the heat pipe, and then splices them in sequence and pushes them to be inserted into the first base tube, so that the heating area of ​​the heat pipe has tube segments with powders of different particle sizes.

[0055] The liquid injection sealing device is mainly used to perform liquid injection sealing on the second pipe section. Specifically, the liquid injection sealing device mainly injects the working fluid into the pipe section after the pipe section is vacuumed, and then welds the pipe section to seal the pipe, and finally prepares the required heat pipe.

[0056] The control processing device includes at least one processor for loading a program to execute the steps of a multi-stage powder-filled heat pipe intelligent manufacturing method. The specific contents of the intelligent manufacturing method steps are as follows.

[0057] Reference Figure 2 , a method for intelligent manufacturing of multi-stage powder-filled heat pipes, the specific steps of which can be shown as follows.

[0058] S0. Pretreatment step: performing a powder filling process with different powder particle sizes on different substrate tubes, thereby obtaining a plurality of raw material substrate tubes, that is, the powder particles of different raw material substrate tubes have different sizes.

[0059] S1. Obtain a cutting coefficient, wherein the cutting coefficient at least includes the number of first sub-segments and the length of each first sub-segment.

[0060] Specifically, since the present application scheme uses a raw material base tube that has been pre-filled with powder to cut to obtain different first sub-tube segments, the corresponding raw material base tube can be selected according to the type of powder particles required for the sub-tube segment, and the length of the sub-tube segment can also be determined according to the required weight of the powder particles. Among them, the difference in the size of the powder particles means that the types of powder particles are different, and the types of powder particles may include but are not limited to: metal powder, such as silver, copper, nickel and other metal powders; ceramic powder, such as aluminum oxide, silicon nitride and other ceramic powders; composite material powder, such as metal + ceramic composite material powder.

[0061] S2. After selecting a corresponding raw material base tube according to the type of powder particles required for each first sub-tube segment, the cutting device is controlled to cut the raw material base tube according to the cutting coefficient to obtain a plurality of first sub-tube segments. The raw material base tube is a base tube having grooves and a powder structure layer.

[0062] Specifically, for the heat pipe to be prepared, in addition to selecting the raw material base tube according to the powder particle size, the raw material base tube can also be selected according to the groove type required by different first sub-tube segments. Among them, the shape and / or size of the groove are different, which means that the groove type is different. Generally, the shape of the groove can be circular, rectangular, trapezoidal or other complex shapes. Figure 3 As shown, the first groove 301 shown in FIG. 3a and the second groove 302 shown in FIG. 3b are both rectangular, but the width of the first groove 301 is smaller than the width of the second groove 302, and the third groove 303 shown in FIG. 3c is in the shape of a trapezoid, wherein the narrower side is the open side. It can be seen that the shape and / or size of the groove can be selected according to actual needs. That is, in some embodiments, the grooves provided in at least two of the first sub-segments are different.

[0063] It can be seen that by cutting the base tubes of different raw materials to obtain several first sub-tube segments, different sub-areas of the heating zone can also have grooves of different structures and / or sizes, so that the grooves of different sub-areas can be selected as needed to improve the permeability of the overall groove, and the heat pipe prepared in this way has higher compatibility and adaptability.

[0064] In some embodiments, in order to ensure that the grooves in two adjacent first sub-segments are connected after splicing, this embodiment adopts an alignment structure technology to achieve. In this embodiment, the cutting coefficient also includes the position information of the first sub-segment, and the step S2 specifically includes the following steps.

[0065] S201. Determine a cutting method corresponding to two ends of the first sub-segment according to position information of the first sub-segment, wherein the cutting method is determined according to an alignment structure between two first sub-segments located at adjacent positions.

[0066] Specifically, for the first sub-tube segments with powders of different particle sizes, their positions correspond to the heat distribution emitted by the heat source. Therefore, the first sub-tube segments filled with powders of different particle sizes have corresponding positions in the heat pipe, which determines the splicing and embedding order between the first sub-tube segments. Therefore, by determining the cutting method according to the alignment structure in this step, the raw material base tube is cut, and the alignment structure between two adjacent first sub-tube segments can be set. Among them, for the cutting method, it at least includes the cutting path and / or rotation angle of the cutting knife, the rotation angle mainly determines the inclination with the cutting surface, and the cutting path mainly determines the structural shape of the cutting surface.

[0067] S202, according to the cutting method at both ends of the first sub-segment, the length and the number of the first sub-segments, control the cutting device to cut the raw material base pipe to obtain a plurality of first sub-segments.

[0068] The above steps are used to set the alignment structure, which is not only simple and convenient, but can also be achieved by adjusting and modifying the parameters of the cutting device. There is no need to purchase additional equipment or replace different types of cutting blades, thus reducing cost expenditure.

[0069] In some embodiments, the above alignment structure has the following two implementation methods.

[0070] ①. The alignment structure is a concave-convex alignment structure

[0071] Specifically, for the concave-convex alignment structure, it is mainly that one end of one of the two first sub-tube segments located at adjacent positions has a protrusion, and one end of the other first sub-tube segment located at adjacent positions has a groove matching the protrusion. For this method, it is mainly achieved by adjusting and determining the cutting path of the cutting knife.

[0072] ② The alignment structure is an inclined surface alignment structure

[0073] Specifically, for the inclined surface alignment structure, it is mainly: one end of one of the two first sub-tube segments located at adjacent positions has a first inclined surface, and one end of the other first sub-tube segment located at adjacent positions has a second inclined surface matching the first inclined surface. For this method, cutting is mainly achieved by adjusting the rotation angle of the cutting knife. It can be seen that this implementation method only needs to adjust the rotation angle for inclined cutting. Compared with the above-mentioned first method that requires cutting along the knife path, this method has higher cutting processing efficiency and higher operation convenience.

[0074] In some embodiments, the alignment structures between two first sub-tube segments at different adjacent positions are different. Specifically, the alignment structure between the two first sub-tube segments at the i-th position and the two first sub-tube segments at the i+1-th position is the first alignment structure, and the alignment structure between the two first sub-tube segments at the i-1-th position and the two first sub-tube segments at the i-th position is the second alignment structure, and the first alignment structure is different from the second alignment structure. Furthermore, the difference in alignment structure may refer to the difference in shape, size, and inclination of the inclined surface. Figure 4 As shown, the second alignment structure is a bevel alignment structure, and the first alignment structure is a concave-convex alignment structure; and the bevel 401 at one end of the first sub-tube segment located at the i-1th position and the bevel 402 at the other end of the first sub-tube segment located at the i-1th position have different inclinations, which means that the third alignment structure between the two first sub-tube segments located at the i-2th position and the i-1th position is different from the second alignment structure; similarly, the first sub-tube segment located at the i-th position has a square protrusion 403 at one end, the first sub-tube segment located at the i+1th position has a square groove 404 matching the square protrusion 403 at one end, and the first sub-tube segment located at the i+1th position has an arc protrusion 405 at the other end, which means that the first alignment structure and the fourth alignment structure between the two first sub-tube segments located at the i+1th position and the i+2th position have different concave-convex shapes. By analogy, the shape of the fourth alignment structure may also be a square, but its size is different from that of the square groove 404 and the square protrusion 403 , which also means that the two alignment structures are different.

[0075] It can be seen that by making the alignment structures different, when an error occurs in the splicing order of the first sub-tube segment, the first sub-tube segment will not be set in an incorrect position due to successful splicing (such as the fit between the protrusion and the groove or the fit between the first inclined surface and the second inclined surface). In other words, this method can avoid the situation where the first sub-tube segment is placed incorrectly due to an error in the splicing order, thereby improving the accuracy of the heat pipe preparation work.

[0076] In some embodiments, the size of the powder particles filled in the first sub-segment corresponding to the heat source concentration area among several first sub-segments is the largest, and the size of the powder particles filled in the remaining first sub-segments can be adaptively selected according to the structure, heat dissipation requirements, etc. It can be seen that the powder with large particle size can increase the porosity to improve the heat absorption effect, and the sub-segments filled with smaller powders with different particle sizes can improve the porosity while improving the conductivity, thereby greatly improving the heat dissipation performance of the heat pipe. In this embodiment, after experimental testing of this heat pipe structure, it can improve the heat dissipation of the heat pipe by more than 30%.

[0077] S3. Control the discharging device to sequentially splice and embed a plurality of first sub-tube segments into the first base tube to obtain a second tube segment, wherein the raw material base tube is made of a different material type than the first base tube.

[0078] Specifically, when a plurality of first sub-segments are placed on the splicing platform, the positions of the alignment structures between two adjacent sub-segments are basically staggered, and the pipe body is basically cylindrical, so the positions of the alignment structures between two adjacent sub-segments can be aligned by axial rotation of the first sub-segments to achieve successful splicing between the two. Therefore, the sequential splicing of the plurality of first sub-segments in step S3 specifically includes the following steps.

[0079] S301, rotating at least one of the two first sub-tube segments located at adjacent positions to align the protrusion with the groove and / or align the first inclined surface with the second inclined surface, and splicing the two first sub-tube segments located at adjacent positions.

[0080] Specifically, for splicing two adjacent first sub-segments, there are two situations: successful splicing and failed splicing. Among them, if the pipe segment formed by the two adjacent first sub-segments does not need to have a bending position, then during the splicing process, the alignment structures of the two adjacent first sub-segments can be aligned, so that the two adjacent first sub-segments are spliced ​​together, that is, there is no gap between the two adjacent first sub-segments, which indicates that the splicing is successful, otherwise, it indicates that the splicing fails. Therefore, the step S301 can specifically include the following steps.

[0081] S3011, rotate at least one of the two first sub-tube segments located at adjacent positions, and move the two first sub-tube segments located at adjacent positions toward each other, that is, the two adjacent first sub-tube segments are relatively rotated and brought closer together, so that when the positions of the alignment structures are aligned, the two can be spliced ​​together.

[0082] S3012: After at least one first sub-tube segment rotates at least one circle, determine whether there is a gap between two first sub-tube segments located at adjacent positions.

[0083] Alternatively, for S3012, it may be: when the rotation time of at least one first sub-segment reaches a preset time threshold, it is determined whether there is a gap between two first sub-segments located at adjacent positions. The time threshold is designed to allow at least one first sub-segment to rotate two or more circles, which can further ensure the accuracy of the detection of whether the splicing is successful.

[0084] S3013: When it is determined that there is no gap between the two first sub-pipe segments at adjacent positions, it is determined that the two first sub-pipe segments at adjacent positions are successfully spliced.

[0085] S3014. When it is determined that there is a gap between two first sub-pipe sections at adjacent positions, it is determined that the splicing between the two first sub-pipe sections at adjacent positions has failed, and a warning message is issued.

[0086] In some embodiments, if the tube segment formed by two adjacent first sub-segments has a bend, the alignment structure between the two adjacent sub-segments is a slope alignment structure, and the first slope at one end of a first sub-segment and the second slope at one end of another first sub-segment have different inclinations, so after cutting at different inclinations, the shape of the gap formed between the first slope and the second slope will be the same as the preset shape. Figure 5 As shown, if the first gap 501 formed between the first inclined surface and the second inclined surface is the same as the preset triangular shape, it means that the two first sub-tube segments have been aligned. Therefore, during the rotation and movement of the first sub-tube segments in this embodiment, whether the splicing is successful can be determined by whether the gap shape formed between the first inclined surface and the second inclined surface is the preset shape. That is, in this embodiment, step S301 further specifically includes the following steps.

[0087] S3015: When it is determined that there is a gap between two first sub-tube sections at adjacent positions, determine whether a shape of the gap formed by the first inclined surface and the second inclined surface is the same as a preset shape.

[0088] S3016: When it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is the same as the preset shape, it is determined that the two first sub-pipe sections located at adjacent positions are successfully spliced.

[0089] S3017: When it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is different from the preset shape, it is determined that the splicing between the two first sub-pipe sections located at adjacent positions has failed, and a warning message is issued.

[0090] It can be seen that the accuracy of heat pipe preparation can be further guaranteed by the above-mentioned gap identification and judgment method.

[0091] In addition, as to whether the above-mentioned gap exists and whether the shape of the gap is the same as the preset shape, it can be achieved by using an image capturing device to capture images of two adjacent first sub-tube segments, and then using line positioning and recognition technology in the image to determine whether there is a gap between the two adjacent first sub-tube segments and whether the shape of the existing gap is the same as the preset shape based on the slope of the recognized line and its position.

[0092] In some embodiments, when the splicing is successful, the following steps are further performed after step S3016.

[0093] S3018. When it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is the same as the preset shape, the rear first sub-tube segment of the two adjacent first sub-tube segments is pushed toward the front first sub-tube segment in the first base tube to make the first inclined surface fit with the second inclined surface, thereby achieving bending and splicing of the first base tube.

[0094] Specifically, the first sub-tube segment in front refers to the first sub-tube segment that enters the first base tube first, and similarly, the first sub-tube segment in the rear refers to the first sub-tube segment that enters the first base tube later among the two adjacent first sub-tube segments. After the two adjacent first sub-tube segments are pushed to the corresponding positions in the first base tube, the pushing is continued to make the first inclined surface fit the second inclined surface, so that the first base tube is bent, such as Figure 6 As shown. It can be seen that compared with the traditional one-piece heat pipe shell manufacturing, if the bending shape / degree of the bending position does not meet the actual situation, a complete shell needs to be remade. For this embodiment, it is only necessary to cut out the sub-tube segments that meet the slope inclination requirements from the raw material base tube according to the needs and re-splice them. It can be seen that this can flexibly and conveniently realize the bending and forming of the tube body, and the flexibility of modification and adjustment is high, and it can also save time and cost.

[0095] In some embodiments, the raw material base tube is made of metal copper, and the material of the first base tube is metal aluminum. It can be seen that the heat pipe prepared in this way has a structure of a copper tube layer on the inside and an aluminum tube layer on the outside. Compared with the copper tube layer of a traditional heat pipe, the material required for the copper tube layer of this embodiment can be reduced, thereby saving material investment costs, and the aluminum tube is softer and is easy to realize the bending of the tube body, the slot embedding and other shape formation.

[0096] In some embodiments, after the plurality of first sub-tube segments are all nested in the first base tube, the first base tube and the first sub-tube segments need to be fixed to each other. Therefore, the step S3 further includes the following steps.

[0097] S3019, fixing the first base pipe and the first sub-pipe segment.

[0098] Specifically, the first base tube and the first sub-tube segment can be fixed by an adhesive. Alternatively, in this embodiment, an annular groove is provided on the outer side of a plurality of first sub-tube segments, so step S3019 may include: rolling the second tube segment by a roller press to change the shape of the first base tube, and the shape matches the annular groove. In other words, since the hardness of copper metal is higher than that of aluminum metal, the first base tube implemented by aluminum metal is more likely to deform during rolling, and does not affect the internal copper tube segment structure. At this time, it is equivalent to deforming a convex structure protruding toward the annular groove at a position corresponding to the annular groove on the first base tube, thereby forming a clamping structure between the first base tube and the first sub-tube segment, thereby realizing mutual fixation between the first base tube and the first sub-tube segment.

[0099] Or, if Figure 7 As shown, step S3019 may also include: rolling the corresponding position on the second pipe segment by a rolling machine to form a narrow opening 701 at the corresponding position, so as to limit the plurality of first sub-pipe segments and simultaneously fix the first base pipe and the first sub-pipe segments to each other, without welding and fixing the plurality of first sub-pipe segments. This method is convenient and highly operable.

[0100] It should be noted that, for the above-mentioned annular groove and narrow opening, both can exist at the same time or one of them can exist selectively as needed.

[0101] S4, controlling the liquid injection and sealing device to perform liquid injection and sealing processes on the second pipe segment, and finally preparing the required multi-segment filled heat pipe.

[0102] Specifically, this step may include vacuuming the pipe section before liquid injection, liquid injection and head welding. The above steps are conventional steps in heat pipe manufacturing and will not be repeated here.

[0103] It can be seen that the preparation method of the embodiment of the present application has the advantages of flexibility, easy operation, cost reduction, and improved processing efficiency, and can greatly improve the heat dissipation performance of the heat pipe to meet the current increasingly high heat dissipation requirements.

[0104] Reference Figure 7-Figure 8 , a multi-section powder-filled heat pipe, which is manufactured by the steps of the above-mentioned manufacturing method. As shown in the figure, the heating zone is provided with a first sub-segment having a first powder structure layer 702, a first sub-segment having a second powder structure layer 703, a first sub-segment having a third powder structure layer 704... a first sub-segment having an nth powder structure layer 705, wherein the powder structures of the first powder structure layer 702 to the nth powder structure layer are all different, and n is the total number of sub-segments. It can be seen from the cross-sectional schematic diagram of the heat pipe heating zone that a powder structure layer 801 is provided on the inner side of the copper layer 802 having a groove, and an aluminum layer 803 is provided on the outer side.

[0105] The advantages of the heat pipe prepared as above are the same as the beneficial effects described in the above device / method embodiments, and will not be elaborated here.

[0106] Furthermore, when the ambient temperature is 0°C or below, the currently commonly used working fluid, water, will freeze, and its volume will increase after freezing, so that the product will have the risk of bulging and deformation, and the bulging will destroy the internal capillary structure to a certain extent, resulting in poor heat dissipation effect. Therefore, if water is used as the working fluid, the heat pipe cannot start working smoothly at 0°C or below. To this end, the working fluid, water, currently used in the heat pipe is replaced with a working fluid that will not freeze at 0°C or below, such as anhydrous methanol, anhydrous ethanol and other alcohol substances. However, if such a working fluid is used to prepare the heat pipe, then the vacuuming process can only be performed in an environment of -40°C or below, otherwise, its vaporization rate will be too fast, resulting in unstable internal performance. In order to solve this problem, in this embodiment, a sealed liquid injection component can be used to store the working fluid, and then the working fluid is released after the heat pipe is vacuumed and sealed. Therefore, for the above step S4, it can include the following steps.

[0107] S401, such as Fig. 9 As shown, the first preparation mechanism is controlled to set the liquid injection component 901 in the second pipe section, wherein the liquid injection component 901 includes a sealing body for storing the working fluid and a puncturing structure for puncturing the sealing body.

[0108] Specifically, the working fluid stored in the sealing body is pre-filled and stored in the sealing body. Therefore, before step S401, there is a pre-processing step S400: filling the sealing body with the working fluid.

[0109] In some embodiments, in order to ensure that the puncture structure can puncture the sealing body, the thickness of the first end face of the sealing body facing the puncture structure can be made smaller than the thickness of the other end faces of the sealing body, wherein the other end faces of the sealing body refer to the end faces of the sealing body that are not facing the puncture structure. In the implementation mode of this sealing body, the corresponding puncture method is: puncture the first end face with the puncture structure, so that the working fluid flows out of the sealing body. However, the puncture end of the puncture structure is generally a pointed end, so when it punctures the sealing body, the working fluid can only flow out from the puncture hole, which will cause the outflow speed of the working fluid to be slow, and it is difficult for the working fluid to flow out completely, which will reduce the heat dissipation performance of the heat pipe. For this reason, the puncture method of the embodiment of the present application should make the puncture opening as large as possible.

[0110] In some embodiments, the sealing body is provided with a plurality of notches on the first end face facing the puncture structure. By providing a plurality of notches on the first end face, when the puncture structure applies force to the first end face, the first end face is deformed by the force so that the notches are cracked, so as to achieve the effect of tearing the first end face apart. Compared with the above-mentioned puncture method, the puncture opening of the puncture method of this embodiment is larger, which can be more conducive to the outflow of the working fluid. It should be noted that in this puncture method, the puncture structure will not puncture the first end face. Furthermore, in this embodiment, the thickness of the first end face of the sealing body facing the puncture structure can also be less than the thickness of the other end faces of the sealing body.

[0111] In some embodiments, Fig.10 As shown, a plurality of notches 1001 are radially arranged on the first end surface to form a plurality of breakable areas on the first end surface, and the breakable areas are fan-shaped.

[0112] Specifically, in this embodiment, the shape of the first end face is circular, and a plurality of notches 1001 are extended from the center of the circle along the radius to the edge of the first end face, so that when the first end face is compressed, the notches will split along the center of the circle to obtain a plurality of fan-shaped thin slices, and in the process of the sealing body pressing against the puncture structure, the puncture structure will continue to apply force to the thin slice, causing the thin slice to bend and approach the side wall of the sealing body, thereby further increasing the puncture opening.

[0113] In some embodiments, in order to maximize the puncture opening and prevent the thin sheet from blocking the working fluid from flowing out of the sealing body, the puncture end of the puncture structure should be as close to the inner wall of the sealing body as possible, that is, the position of the puncture end of the puncture structure corresponding to the first end surface should be as close to the edge of the first end surface as possible, so that after the puncture structure continues to apply force to the thin sheet, the thin sheet can be bent and close to the side wall of the sealing body until the thin sheet fits the side wall of the sealing body. Fig.12 As shown, the force point of the first end face is close to the edge, so the pressure intensity of the first end face will decrease from the edge position to the center position. Therefore, in order to ensure that the notch can be completely cracked, the thickness of the first end face increases from the center position of the first end face (i.e., the center position) along the radial direction to the edge position of the first end face. In this way, although the pressure at the center position is relatively small, the notch corresponding to this area can be successfully cracked.

[0114] In some embodiments, Fig.11 As shown, the breakable area includes a first sub-area and a second sub-area, the first sub-area is fan-shaped, and the cross-section 1101 of the first sub-area is triangular, the second sub-area is ring-shaped, and the cross-section 1102 of the second sub-area is rectangular.

[0115] Specifically, the cross section 1101 of the first sub-region is in the shape of a right triangle, and the length of its short right-angled side is the same as the rectangular width of the cross section 1102. And at this time, if the cross section of the puncturing end of the puncturing structure is in the shape of a right triangle, then the rectangular length of the cross section 1102 can be determined according to the length of the right-angled side of the cross section of the puncturing end (this right-angled side is the right-angled side of the puncturing end close to the inner wall of the sealing body), so that when the thin sheet is attached to the inner wall of the sealing body, the puncturing end and the thin sheet are completely attached, so as to avoid the concave position formed between the puncturing end and the thin sheet, resulting in the working fluid being blocked from flowing out by the concave position. Also, if Fig.12 As shown, the oblique edge of the cross section 1101 and the oblique edge of the cross section of the puncture end can be spliced ​​into a guide surface 1201, which is conducive to guiding the working fluid to flow out quickly from the guide surface.

[0116] In some embodiments, Fig.10 As shown, each of the fragile areas is provided with at least one reinforcing rib 1002, so as to prevent the heat generated by welding from causing the working fluid to expand due to heat, thereby causing the seal to rupture. Fig.11 As shown, the shape of the cross section 1103 of the reinforcing rib can match the shape of the cross section 1101 of the first sub-region, that is, the shape of the cross section 1103 of the reinforcing rib is also a right triangle, and its hypotenuse fits with the hypotenuse of the cross section 1101.

[0117] In some embodiments, Fig.12 As shown, a plurality of protrusions 1202 are provided on the second end surface of the piercing structure facing the first end surface, the number of the protrusions 1202 is greater than or equal to the number of the breakable areas, and at least one protrusion 1202 corresponds to a breakable area.

[0118] Specifically, the protrusion 1202 is used as the piercing end of the piercing structure. Since the piercing end is arranged as close as possible to the edge of the first end face, in order to increase the force points on the edge of the first end face and thus increase the pressure strength thereof, so as to facilitate the cracking of the notch, the number of the protrusions 1202 can be at least two and arranged along the edge of the first end face; or, when the number of the protrusions 1202 is one, in order to also achieve the purpose of increasing the pressure strength on the edge of the first end face, the shape of the protrusion 1202 can be circular, and the cross-section of the protrusion 1202 can be triangular.

[0119] In some specific embodiments, in order to facilitate the fixed installation of the puncture structure, the puncture structure includes a hollow cylinder 1203, and the protrusion 1202 is arranged on the third end face of the hollow cylinder 1203 facing the first end face, and the hollow cylinder 1203 is used to fix the protrusion 1202 on the second pipe segment. In the above embodiment, it can be seen that the second pipe segment includes a copper tube layer and an aluminum tube layer, and the hollow cylinder 1203 can be arranged on the copper tube layer and / or the aluminum tube layer to fix the protrusion 1202 on the second pipe segment. Alternatively, other fixing methods can be used to fix the protrusion 1202 on the second pipe segment, which is not particularly limited here, and the required fixing design can be selected according to actual needs.

[0120] In some specific embodiments, the sealing body is provided with an injection hole, a sealing plug is provided in the injection hole, and a metal sheet for covering the injection hole is also provided on the sealing body. The sealing plug is a silicone sealing nail. Based on this structure, for the above step S400, it can be specifically as follows: in a low temperature environment, the working fluid is injected into the sealing body through the injection hole, and then the injection hole is plugged with a silicone sealing nail, and then the metal sheet is covered on the injection hole, and the metal sheet is welded to the sealing body in an inert gas environment, so as to achieve the sealing of the sealing body while preventing the alcohol working fluid from burning and exploding.

[0121] S402, controlling the second preparation mechanism to perform vacuuming and capping on the second pipe section, wherein the vacuuming operation can be performed at room temperature.

[0122] S403, controlling the third preparation mechanism to push the second pipe section, thereby driving the sealing body to press against the puncture structure, so that the puncture structure punctures the sealing body, and the working fluid flows out of the sealing body.

[0123] It can be seen that the heat pipe prepared by the above method can be started and operated smoothly at 0°C or below, and the vacuum operation in the preparation process does not need to be performed in a temperature environment below -40°C, thereby reducing the difficulty of preparing the heat pipe that can be started at low temperatures.

[0124] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A multi-stage powder-filled heat pipe intelligent manufacturing method, characterized in that: The method comprises the following steps: S1. Obtaining a cutting coefficient, wherein the cutting coefficient at least includes the number of first sub-segments and the length of each first sub-segment; S2. After selecting a corresponding raw material base tube according to the type of powder required for each first sub-tube segment, controlling a cutting device to cut the raw material base tube according to the cutting coefficient to obtain a plurality of first sub-tube segments, wherein the raw material base tube is a base tube having grooves and a powder structure layer; S3, controlling the discharging device to sequentially splice a plurality of first sub-tube segments and then embed them into the first base tube to obtain a second tube segment, wherein the raw material base tube and the first base tube are of different material types; S4, controlling the liquid injection head sealing device to perform liquid injection head sealing processing on the second pipe section; The size of the powder particles filled in the first sub-tube segment corresponding to the heat source concentration area among the plurality of first sub-tube segments is the largest; and the grooves arranged in at least two of the plurality of first sub-tube segments are different.

2. The method according to claim 1, characterized in that The cutting coefficient also includes the position information of the first sub-segment, and the step S2 specifically includes: S201, determining a cutting method corresponding to two ends of the first sub-segment according to position information of the first sub-segment, wherein the cutting method is determined according to an alignment structure between two first sub-segments located at adjacent positions; S202, according to the cutting method at both ends of the first sub-segment, the length and the number of the first sub-segments, control the cutting device to cut the raw material base pipe to obtain a plurality of first sub-segments.

3. The method according to claim 2, characterized in that The alignment structure is a concave-convex alignment structure, wherein one end of one of the two first sub-tube segments located at adjacent positions has a protrusion, and one end of the other of the two first sub-tube segments located at adjacent positions has a groove matching the protrusion; And / or, the alignment structure is a bevel alignment structure, one end of one of the two first sub-tube segments located at adjacent positions has a first bevel, and one end of the other first sub-tube segment located at adjacent positions has a second bevel matching the first bevel.

4. The method according to claim 3, characterized in that The step S3 of sequentially splicing a plurality of first sub-pipe segments specifically includes: S301, rotating at least one of the two first sub-tube segments located at adjacent positions to align the protrusion with the groove and / or align the first inclined surface with the second inclined surface, and splicing the two first sub-tube segments located at adjacent positions.

5. The method according to claim 4, characterized in that The step S301 specifically includes: S3011, rotating at least one of two first sub-tube segments located at adjacent positions, and moving the two first sub-tube segments located at adjacent positions toward each other; S3012, after at least one first sub-segment rotates at least one circle, determining whether there is a gap between two first sub-segments located at adjacent positions; S3013, when it is determined that there is no gap between the two first sub-pipe segments at adjacent positions, it is determined that the two first sub-pipe segments at adjacent positions are successfully spliced; S3014. When it is determined that there is a gap between two first sub-pipe sections at adjacent positions, it is determined that the splicing between the two first sub-pipe sections at adjacent positions has failed, and a warning message is issued.

6. The method according to claim 5, characterized in that The step S301 further specifically includes: S3015, when it is determined that there is a gap between two first sub-pipe segments at adjacent positions, determining whether a shape of the gap formed by the first inclined surface and the second inclined surface is the same as a preset shape; S3016, when it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is the same as the preset shape, it is determined that the two first sub-pipe segments located at adjacent positions are successfully spliced; S3017: When it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is different from the preset shape, it is determined that the splicing between the two first sub-pipe sections located at adjacent positions has failed, and a warning message is issued.

7. The method according to claim 6, characterized in that Step S3 also specifically includes: S3018. When it is determined that the shape of the gap formed by the first inclined surface and the second inclined surface is the same as the preset shape, the rear first sub-tube segment of the two adjacent first sub-tube segments is pushed toward the front first sub-tube segment in the first base tube to make the first inclined surface fit with the second inclined surface, thereby achieving bending and splicing of the first base tube.

8. The method according to any one of claims 2 to 7, characterized in that: The alignment structures between the two first sub-tube sections located at different adjacent positions are different.

9. A multi-stage powder-filled heat pipe intelligent manufacturing equipment, characterized in that: The equipment includes: A cutting device, used for cutting the raw material base pipe to obtain a plurality of first sub-pipe sections; A discharging device is used to sequentially splice a plurality of first sub-pipe sections and then nest them into the first base pipe to obtain a second pipe section; A liquid injection head sealing device, used for performing liquid injection head sealing treatment on the second pipe section; A control processing device, comprising at least one processor, for executing the steps of implementing the method according to any one of claims 1 to 8; The control processing device is respectively connected to the cutting device, the discharging device and the liquid injection head device for communication.

10. A multi-stage powder-filled heat pipe, characterized in that: The heat pipe is manufactured by the steps of the method according to any one of claims 1 to 8.

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