Heat pipe and copper net installation method thereof

Abstract

The invention relates to a heat pipe and a copper mesh installation method thereof, which comprises the following steps: S1, cutting a copper mesh according to the size of a copper pipe to obtain a copper mesh sheet, the length of the copper mesh sheet is the same as that of the copper pipe, and the width of the copper mesh sheet is pi times of the diameter of an inner hole of the copper pipe; s2, a copper mesh sheet is curled on the core rod to form a copper mesh sleeve, the side edge of one side of the copper mesh sheet covers the edge of the other side of the copper mesh sheet, and the outer diameter of the copper mesh sleeve is smaller than the inner diameter of the copper pipe; s3, the core rod and the copper net sleeve are inserted into the copper pipe; and S4, broaching is conducted on the copper net sleeve so that the copper net sleeve can be attached to the inner wall of the copper pipe, and the core rod is pulled out. The outer diameter of the copper net sleeve obtained through curling is smaller than the inner diameter of the copper pipe, the copper net sleeve can easily and rapidly enter the copper pipe, large friction force cannot be generated between the copper net sleeve and the inner wall of the copper pipe, and the copper net sleeve can be effectively prevented from being abraded. After insertion, the copper net sleeve is reamed so that the copper net sleeve can be tightly attached to the inner wall of the copper pipe, stretching and other procedures are not needed, the copper pipe and the copper net sleeve can be prevented from deforming, and the technology is simpler.

Description

Technical Field

[0001] The invention belongs to the field of heat pipes, in particular to a heat pipe and a copper mesh installation method thereof. Background Art

[0002] Heat pipe is a kind of high-efficiency heat transfer device, which is often used for heat dissipation of electronic equipment. One end of the heat pipe is the evaporation end, and the other end is the cooling end. The inner wall of the heat pipe is provided with a capillary structure layer and a medium. When working, the medium at the evaporation end is vaporized, and then flows to the cooling end through the inner cavity of the heat pipe. It liquefies after being cooled, and returns to the evaporation end under the action of the capillary structure layer to realize the circulation of the medium. Common capillary structure layers include grooves, sintered layers, metal meshes and composite layers. Grooves are multiple groove structures arranged on the inner wall of the heat pipe, sintered layers are made of sintered metal powder, metal meshes are mesh structures, and composite layers are a combination of multiple capillary structure layers.

[0003] Among them, when the capillary structure layer adopts a metal mesh, the heat pipe is generally a copper pipe, and the metal mesh generally adopts a copper mesh. When preparing, a large-sized copper mesh is first prepared, and then the copper mesh is cut according to the inner diameter of the copper pipe so that the length of the copper mesh is adapted to the length of the copper pipe, and the width of the copper mesh is π times the inner diameter of the copper pipe, and then the copper mesh is curled and inserted into the copper pipe. When inserting the copper mesh, the copper mesh is generally set on the mandrel, and then the mandrel and the copper mesh are inserted into the copper pipe at the same time, and then the mandrel is taken out. In order to ensure the heat dissipation effect of the heat pipe, the copper mesh must be closely fitted to the inner wall of the copper pipe, resulting in friction between the copper mesh and the inner wall of the copper pipe when the copper mesh is inserted, which is difficult to insert, and the copper mesh is easily damaged, and the efficiency is low. CN01124296.5 discloses a copper mesh installation method for capillary processing in a heat pipe process, which can solve the problem of large friction between the copper mesh and the copper pipe and easy damage of the copper mesh, but it is necessary to stretch the copper pipe and the copper mesh, which increases the process of copper mesh installation and increases the production cost. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a heat pipe and a copper mesh installation method thereof, which can reduce the difficulty of copper mesh installation and prevent copper mesh wear.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a copper mesh installation method, comprising the following steps:

[0006] S1. Cut the copper mesh according to the size of the copper tube to obtain a copper mesh sheet, the length of the copper mesh sheet is the same as the length of the copper tube, and the width of the copper mesh sheet is π times the diameter of the inner hole of the copper tube;

[0007] S2, curling the copper mesh on the mandrel to form a copper mesh sleeve, with one side edge of the copper mesh covering the other side edge, so that the outer diameter of the copper mesh sleeve is smaller than the inner diameter of the copper tube;

[0008] S3, insert the mandrel together with the copper mesh sleeve into the copper tube;

[0009] S4. Expand the copper mesh sleeve so that it fits the inner wall of the copper tube, and pull out the core rod.

[0010] Further, the mandrel is a hollow rod, and a plurality of axially extending positioning grooves are arranged on the outer wall of the mandrel, and the positioning grooves are evenly distributed around the center line of the mandrel, and a hole expansion block is arranged in each positioning groove, and the hole expansion block and the positioning groove are slidably matched in the radial direction of the mandrel, and the hole expansion block is connected to a hole expansion drive assembly;

[0011] In step S2, the hole expansion block is located in the positioning groove;

[0012] In step S4, the reaming drive assembly drives each reaming block to move radially outward synchronously. After the reaming block contacts the copper mesh sleeve, it pushes the copper mesh sleeve close to the inner wall of the copper tube; then the reaming drive assembly drives each reaming block back to the positioning groove to pull out the core rod.

[0013] Furthermore, in step S2, after the copper mesh is curled on the core rod, two side edges of the copper mesh are located between two adjacent positioning grooves;

[0014] In step S4, after the reaming drive assembly drives each reaming block back into the positioning groove, the core rod rotates to a set angle so that one of the positioning grooves is aligned with the docking interfaces on both sides of the copper mesh sleeve; the reaming drive assembly is used to drive each reaming block to move radially outward synchronously again, and the reaming blocks are pressed against the copper mesh sleeve and the docking interfaces again.

[0015] Furthermore, the reaming drive assembly includes a driving rod arranged inside the core rod, the outer wall of the driving rod is provided with a plurality of first bosses and a plurality of second bosses, the inner wall of each reaming block is provided with a third boss and a fourth boss, the number of the third bosses is the same as the number of the first bosses, and the number of the fourth bosses is the same as the number of the second bosses; the first boss is provided with a first inclined surface toward the side wall of the reaming block, and the third boss is provided with a second inclined surface toward the side wall of the driving rod; the second boss and the fourth boss each include a radial section and an axial section The radial section and the axial section are distributed in an L shape, the axial section of the second boss is provided with a third inclined surface toward the side wall of the driving rod, and the axial section of the fourth boss is provided with a fourth inclined surface toward the side wall of the reaming block, the fourth inclined surface is parallel to the first inclined surface, and the third inclined surface is parallel to the second inclined surface; when the driving rod drives the first boss to move axially toward the third boss, the first inclined surface fits the second inclined surface; when the driving rod drives the second boss to move axially toward the fourth boss, the axial section of the second boss enters the inner side of the axial section of the fourth boss, and the third inclined surface fits the fourth inclined surface.

[0016] Further, the mandrel is installed on the installation machine, and a horizontal turntable is provided on the installation machine, and the turntable is connected to a first driving mechanism that drives the turntable to rotate, and a net rolling station and a copper mesh installation station are provided below the turntable, and the net rolling station and the copper mesh installation station are both provided with a mandrel, and the mandrel is vertically arranged, and the upper end of the mandrel is installed on the turntable through a bearing, and each mandrel is connected to a second driving mechanism that drives the mandrel to rotate; the net rolling station is provided with a moving frame, and the moving frame is connected with a translation driving mechanism, and a vertical curling shaft is provided on the moving frame, and both ends of the curling shaft are installed on the moving frame through bearings, and a curling gap is provided between the curling shaft and the mandrel of the net rolling station; a first lifting mechanism is provided below the copper mesh installation station, and a positioning seat is provided on the top of the first lifting mechanism, and a positioning block is provided on the positioning seat through a bracket, and a copper tube positioning mechanism is provided in the positioning block; a second lifting mechanism is provided on the positioning seat below the positioning block, and a connecting mechanism for connecting a driving rod is provided at the upper end of the second lifting mechanism;

[0017] In step S2, one side of the copper mesh is manually inserted into the curling gap, and the translation drive mechanism pushes the moving frame to move toward the mandrel, so that the curling axis presses the side of the copper mesh, and then the second drive mechanism drives the mandrel to rotate 360 ​​degrees to curl the copper mesh on the mandrel, and then the translation drive mechanism is used to push the moving frame to reset, and the uncurled part of the copper mesh is manually curled to form a copper mesh sleeve;

[0018] The first driving mechanism drives the turntable to rotate to a set angle, transports the copper mesh sleeve together with the core rod to the copper mesh installation station, and vertically fixes the copper tube to the positioning block, and then uses the first lifting mechanism to push the positioning seat and the copper tube to move upward, so that the core rod passes through the copper tube; then the connecting mechanism connects the second lifting mechanism with the driving rod, and uses the second lifting mechanism to drive the driving rod to move axially to complete the expansion of the copper mesh sleeve.

[0019] Further, the connecting mechanism comprises an upper plate and a lower plate, there is a distance between the upper plate and the lower plate, and the upper plate and the lower plate are connected as a whole through a connecting column, the lower plate is fixedly connected to the second lifting mechanism, a rectangular hole is provided on the upper plate, a rectangular connecting block is provided on the lower end of the driving rod, the length of the connecting block is less than the length of the rectangular hole, the width of the connecting block is less than the width of the rectangular hole, and the length of the connecting block is greater than the width of the rectangular hole;

[0020] When the first lifting mechanism pushes the positioning seat and the copper tube to move upward, the length direction of the connecting block is parallel to the length direction of the rectangular hole, the connecting block passes through the rectangular hole and reaches between the upper plate and the lower plate, and then the second driving mechanism is used to drive the core rod and the driving rod to rotate as a whole at a set angle, so that the length direction of the connecting block is an acute angle, a right angle or an obtuse angle with the length direction of the rectangular hole. When the second lifting mechanism is lifted or lowered, it can drive the driving rod to move axially.

[0021] Furthermore, the outer wall of the hole expansion block is an arc-shaped wall, and the diameter of the arc-shaped wall is consistent with the inner hole diameter of the copper mesh sleeve after hole expansion.

[0022] Furthermore, there are four hole expansion blocks.

[0023] The heat pipe comprises a copper pipe and a copper mesh capillary layer arranged on the inner wall of the copper pipe, wherein the copper mesh capillary layer is made by the above method.

[0024] The beneficial effects of the present invention are as follows: the outer diameter of the copper mesh sleeve obtained by curling the present invention is smaller than the inner diameter of the copper tube, and when the copper mesh sleeve is inserted, the copper mesh sleeve can easily and quickly enter the copper tube, and no large friction will be generated between the copper mesh sleeve and the inner wall of the copper tube, which can effectively prevent the copper mesh sleeve from being worn. After insertion, the copper mesh sleeve is expanded so that the copper mesh sleeve is closely attached to the inner wall of the copper tube, and no stretching process is required, which can prevent the copper tube and the copper mesh sleeve from being deformed, and the process is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the process of the present invention;

[0026] Figure 2 is a schematic diagram of a heat pipe of the present invention;

[0027] Figure 3 It is a schematic cross-sectional view of the copper mesh after it is curled on the mandrel;

[0028] Figure 4 This is a schematic diagram of the movement of the copper mesh sleeve when expanding the hole;

[0029] Figure 5 is a schematic cross-sectional view of a mandrel according to an embodiment;

[0030] Figure 6 yes Figure 5 A schematic diagram of the core rod expansion block shown when it moves outward;

[0031] Figure 7 yes Figure 5 A schematic diagram of the core rod expansion block shown when it moves inward;

[0032] Figure 8 is a schematic cross-sectional view of the installation machine;

[0033] Fig. 9 It is a schematic diagram of the curling of the copper mesh after the mandrel rotates 360°;

[0034] Fig.10 yes Figure 8 A magnified schematic diagram of part A;

[0035] Figure markings: 1—copper tube; 2—core rod; 3—copper mesh sleeve; 4—expansion block; 5—docking interface; 6—driving rod; 7—first boss; 8—second boss; 9—third boss; 10—fourth boss; 11—first inclined plane; 12—second inclined plane; 13—third inclined plane; 14—fourth inclined plane; 15—turntable; 16—first driving mechanism; 17—second driving mechanism; 18—moving frame; 19—first lifting mechanism; 20—positioning seat; 21—bracket; 22—positioning block; 23—second lifting mechanism; 24—translation driving mechanism; 25—curling shaft; 26—upper plate; 27—lower plate; 28—rectangular hole; 29—connecting block; 30—connecting column. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] The heat pipe of the present invention, Figure 2 As shown, it includes a copper tube 1 and a copper mesh capillary layer arranged on the inner wall of the copper tube 1. The copper mesh capillary layer is a copper mesh sleeve 3. After the copper mesh sleeve 3 is installed in the copper tube 1, the copper mesh capillary layer is obtained.

[0038] The installation method of copper mesh is as follows: Figure 1 As shown, the following steps are included:

[0039] S1. Cut the copper mesh according to the size of the copper tube 1 to obtain a copper mesh sheet, the length of the copper mesh sheet is the same as the length of the copper tube 1, and the width of the copper mesh sheet is π times the diameter of the inner hole of the copper tube 1. The copper mesh is prepared by the existing process and is a larger piece of copper mesh. After cutting, a copper mesh sheet with a size adapted to the copper tube 1 is obtained.

[0040] S2, curling the copper mesh on the core rod 2 to form a copper mesh sleeve 3, and the edge of one side of the copper mesh covers the edge of the other side, so that the outer diameter of the copper mesh sleeve 3 is smaller than the inner diameter of the copper tube 1, and the curled copper mesh sleeve 3 is as follows Figure 3 As shown, the two sides of the copper mesh sleeve 3 have overlapping parts. If the copper mesh is just curled into a regular cylinder and the two sides of the copper mesh are spliced, the outer diameter of the copper mesh sleeve 3 should be equal to the inner diameter of the copper tube 1, and the copper mesh sleeve 3 is not easy to insert into the copper tube 1, and it is difficult to ensure that the copper mesh sleeve 3 is close to the inner wall of the copper tube 1. Therefore, in the present invention, a core rod 2 with a smaller outer diameter than the traditional core rod is used, and the inner and outer diameters of the copper mesh sleeve 3 are appropriately reduced. When the copper mesh sleeve 3 is inserted into the copper tube 1, there is a certain gap between the copper mesh sleeve 3 and the inner wall of the copper tube 1, the insertion resistance is very small, and there is no friction, which can effectively prevent the copper mesh sleeve 3 from being worn.

[0041] S3, insert the core rod 2 together with the copper mesh sleeve 3 into the copper tube 1. The core rod 2 is preferably coaxial with the copper tube 1. After insertion, there is a gap between the copper mesh sleeve 3 and the inner wall of the copper tube 1, and the two ends of the copper mesh sleeve 3 are aligned with the two ends of the copper tube 1.

[0042] S4, expanding the copper mesh sleeve 3 so that the copper mesh sleeve 3 fits the inner wall of the copper tube 1, and pulling out the core rod 2.

[0043] Since the outer diameter of the copper mesh sleeve 3 is smaller than the inner diameter of the copper tube 1, in order to ensure that the copper mesh sleeve 3 fits the copper tube 1 and converts the copper mesh sleeve 3 into a regular cylindrical shape, the copper mesh sleeve 3 needs to be expanded. Figure 4 As shown, Figure 4 The arrows in the figure are the movement directions of the various parts of the copper mesh sleeve 3. A radial pressure is applied to the inner wall of the copper mesh sleeve 3 to push the side wall of the copper mesh sleeve 3 toward the inner wall of the copper tube 1. The inner and outer diameters of the copper mesh sleeve 3 increase, and the outer wall of the copper mesh sleeve 3 can gradually fit with the inner wall of the copper tube 1. The edge parts of the two sides of the copper mesh sleeve 3 slide relatively along the circumferential direction of the copper mesh sleeve 3, and the overlapping parts of the edges gradually decrease. When the outer diameter of the copper mesh sleeve 3 is consistent with the inner diameter of the copper tube 1, the two sides of the copper mesh sleeve 3 are butted to form a butt joint 5, that is, Figure 2 Heat pipe shown.

[0044] In the present invention, the core rod 2 can be pulled out before the hole is expanded, and then the expansion tool is used to extend into the copper mesh sleeve 3 for expansion. However, since the copper mesh sleeve 3 is curled and wrapped around the outer wall of the core rod 2, when the core rod 2 is pulled out, there is friction resistance between the copper mesh sleeve 3 and the core rod 2, which can easily cause damage to the copper mesh sleeve 3. The traditional copper mesh installation process also has the problem of difficulty in pulling out the core rod.

[0045] Therefore, the present invention transforms the mandrel 2 so that the mandrel 2 has the functions of the traditional mandrel 2 and also serves as a hole enlarging tool. The hole can be enlarged immediately after insertion, thereby improving the convenience of copper mesh installation. The mandrel 2 can be pulled out after hole enlarging, thereby solving the problem of difficulty in pulling out the mandrel 2.

[0046] Specifically, Figure 5 As shown, the core rod 2 is a hollow rod with open ends. The outer wall of the core rod 2 is provided with a plurality of axially extending positioning grooves, which are evenly distributed around the center line of the core rod 2. A hole expansion block 4 is provided in each positioning groove. The hole expansion block 4 and the positioning groove are radially slidably matched with the core rod 2. When radial pressure is applied to the hole expansion block 4, the hole expansion block 4 can move radially in the positioning groove. Figure 4 The reaming block 4 is connected to a reaming drive assembly, and the reaming drive assembly is used to drive the reaming block 4 to move radially.

[0047] In step S2, the hole expansion block 4 is located in the positioning groove and does not affect the curling of the copper mesh.

[0048] In step S4, the hole expansion drive assembly drives each hole expansion block 4 to move radially outward synchronously, and after the hole expansion block 4 contacts the copper mesh sleeve 3, the copper mesh sleeve 3 is pushed close to the inner wall of the copper tube 1 to complete the hole expansion. Then the hole expansion drive assembly drives each hole expansion block 4 back to the positioning groove to extract the core rod 2.

[0049] After the copper mesh sleeve 3 is expanded, the inner wall of the copper mesh sleeve 3 is separated from the core rod 2, and there is a gap between the core rod 2. After the expansion block 4 returns to the positioning groove, there is also a gap between the inner wall of the copper mesh sleeve 3 and the expansion block 4. Therefore, the core rod 2 can be easily and quickly pulled out. There is no contact between the core rod 2 and the copper mesh sleeve 3, and there is no friction resistance, which can effectively prevent the copper mesh sleeve 3 from being worn.

[0050] In addition, after the hole is expanded, the expansion block 4 can press the copper mesh sleeve 3 to the inner wall of the copper tube 1, ensuring that the copper mesh sleeve 3 fits tightly to the inner wall of the copper tube 1, thereby ensuring the thermal conductivity of the heat pipe.

[0051] As a preferred embodiment, in step S2, after the copper mesh is curled on the core rod 2, the two side edges of the copper mesh are located between two adjacent positioning grooves. When expanding the hole, the expansion block 4 will not contact the two side edges of the copper mesh sleeve 3, which can ensure that the two side edges of the copper mesh sleeve 3 move in the circumferential direction in the opposite direction, eliminate the overlapping parts, and make the two side edges of the copper mesh sleeve 3 butt. After docking, it is difficult for the two side edges of the copper mesh sleeve 3 to fit tightly against the inner wall of the copper tube 1. Therefore, in step S4, after the expansion drive assembly drives each expansion block 4 to expand the hole and return to the positioning groove, the core rod 2 rotates to a set angle so that one of the positioning grooves is aligned with the docking interface 5 on the two side edges of the copper mesh sleeve 3. Then, the expansion drive assembly is used to drive each expansion block 4 to move radially outward synchronously again, and the expansion block 4 presses the copper mesh sleeve 3 and the docking interface 5 again. When the hole expanding block 4 expands the hole, it contacts and presses part of the copper mesh sleeve 3. When the hole expanding block 4 presses for the second time, it contacts and presses another part of the copper mesh sleeve 3, which can ensure that the entire copper mesh sleeve 3 and the docking interface 5 better fit the inner wall of the copper tube 1.

[0052] like Figure 5 As shown, the reaming drive assembly specifically includes a driving rod 6 arranged inside the mandrel 2, and the diameter of the driving rod 6 is smaller than the inner diameter of the mandrel 2, so that there is a distance between the driving rod 6 and the mandrel 2. The outer wall of the driving rod 6 is provided with a plurality of first bosses 7 and a plurality of second bosses 8, and the inner wall of each reaming block 4 is provided with a third boss 9 and a fourth boss 10, the number of the third bosses 9 is the same as the number of the first bosses 7, and the number of the fourth bosses 10 is the same as the number of the second bosses 8. The first boss 7, the second boss 8, the third boss 9 and the fourth boss 10 can all be 2, and the first boss 7 and the second boss 8 are alternately arranged on the driving rod 6, and the third boss 9 and the fourth boss 10 are alternately arranged on the inner wall of the reaming block 4.

[0053] The first boss 7 is provided with a first inclined surface 11 on the side wall facing the expansion block 4, and the third boss 9 is provided with a second inclined surface 12 on the side wall facing the drive rod 6; the second boss 8 and the fourth boss 10 both include a radial section and an axial section, and the radial section and the axial section are distributed in an L shape, the axial section of the second boss 8 is provided with a third inclined surface 13 on the side wall facing the drive rod 6, and the axial section of the fourth boss 10 is provided with a fourth inclined surface 14 on the side wall facing the expansion block 4, the fourth inclined surface 14 is parallel to the first inclined surface 11, and the third inclined surface 13 is parallel to the second inclined surface 12. When the drive rod 6 drives the first boss 7 to move axially toward the third boss 9, the first inclined surface 11 fits the second inclined surface 12; when the drive rod 6 drives the second boss 8 to move axially toward the fourth boss 10, the axial section of the second boss 8 enters the inner side of the axial section of the fourth boss 10, and the third inclined surface 13 fits the fourth inclined surface 14.

[0054] like Figure 6 As shown, when the driving rod 6 is pushed to move axially, and the driving rod 6 drives the first boss 7 to move axially toward the third boss 9, the first bevel 11 fits the second bevel 12. When the first boss 7 continues to move, the first bevel 11 can push the third boss 9 together with the hole expansion block 4 to move radially outward for a certain distance to complete the hole expansion. After hole expansion, the driving rod 6 is pushed to move axially in the opposite direction, and the driving rod 6 drives the second boss 8 to move axially toward the fourth boss 10. The axial section of the second boss 8 enters the inner side of the axial section of the fourth boss 10, and the third bevel 13 contacts the fourth bevel 14. Figure 7 As shown, the third inclined surface 13 pushes the fourth boss 10 together with the reaming block 4 to move radially inward, so that the reaming block 4 returns to the positioning groove.

[0055] It can be seen that the movement of the reaming block 4 can be controlled by controlling the axial movement of the driving rod 6. In order to facilitate the control of the axial movement of the driving rod 6, the length of the driving rod 6 is greater than the length of the mandrel 2, so that both ends of the driving rod 6 are located outside the mandrel 2. The outer wall of the driving rod 6 can be connected to the inner wall of the mandrel 2 through a spline, and when the mandrel 2 rotates, the driving rod 6 can be driven to rotate synchronously.

[0056] The above steps can be performed manually. In order to improve production efficiency, the present invention installs the mandrel 2 on the installation machine, such as Figure 8 As shown, the installation machine is provided with a horizontal turntable 15, and the turntable 15 is connected to a first driving mechanism 16 for driving the turntable 15 to rotate, and the first driving mechanism 16 can be a servo motor. A mesh rolling station and a copper mesh installation station are provided below the turntable 15. The mesh rolling station is used to roll the copper mesh sheet on the core rod 2, that is, to perform step S2; the copper mesh installation station is used to insert the core rod 2 together with the copper mesh sleeve 3 into the copper tube 2 and expand the hole, that is, to perform steps S3 and S4.

[0057] The mesh rolling station and the copper mesh installation station are both provided with a mandrel 2, which is vertically arranged, and the upper end of the mandrel 2 is installed on the turntable 15 through a bearing, and each mandrel 2 is connected to a second driving mechanism 17 for driving the mandrel 2 to rotate, and the second driving mechanism 17 can be a servo motor. The turntable 15 drives each mandrel 2 to continuously reach the mesh rolling station and the copper mesh installation station, and the copper mesh sheet rolling and copper mesh installation can be carried out simultaneously, thereby improving efficiency.

[0058] Since the copper mesh is very thin and small in width, it is difficult for various existing automatic curling equipment to achieve rapid curling. Therefore, the present invention adopts a combination of manual and equipment methods to roll the mesh. Specifically, the mesh rolling station is provided with a movable frame 18, and the movable frame 18 is connected to a translation drive mechanism 24. A vertical curling shaft 25 is provided on the movable frame 18. Both ends of the curling shaft 25 are installed on the movable frame 18 through bearings. A curling gap is provided between the curling shaft 25 and the core rod 2 of the mesh rolling station. The translation drive mechanism 24 can be a cylinder, a linear motor or other equipment, which can push the movable frame 18 and the curling shaft 25 to move toward the core rod 2 or move away from the core rod 2, thereby adjusting the size of the curling gap. In step S2, one side of the copper mesh is manually inserted into the curling gap, and the translation drive mechanism 24 pushes the moving frame 18 to move toward the core rod 2, so that the curling shaft 25 presses the side of the copper mesh, and then the second drive mechanism 17 drives the core rod 2 to rotate 360°, and the copper mesh is curled on the core rod 2. During the curling process, the staff holds the copper mesh to ensure that the copper mesh can be stably wound around the core rod 2. After the core rod 2 rotates 360°, there is still excess part of the copper mesh that has not been curled on the core rod 2, such as Fig. 9 Then the translation drive mechanism 24 is used to push the moving frame 18 to reset, the curling shaft 25 loosens the side of the copper mesh, and the staff manually curls the uncurled part of the copper mesh on the core rod 2 to form the copper mesh sleeve 3. The copper mesh is relatively thin and has low strength, so the uncurled part can be quickly curled manually.

[0059] A first lifting mechanism 19 is provided below the copper mesh installation station, and the first lifting mechanism 19 can adopt equipment such as a hydraulic cylinder. A positioning seat 20 is provided on the top of the first lifting mechanism 19, and a positioning block 22 is provided on the positioning seat 20 through a bracket 21. A copper tube positioning mechanism is provided in the positioning block 22, and the copper tube positioning mechanism can adopt various existing columnar clamping mechanisms. A second lifting mechanism 23 is provided on the positioning seat 20 below the positioning block 22, and the second lifting mechanism 23 can adopt equipment such as a cylinder, and a connecting mechanism for connecting the driving rod 6 is provided at the upper end of the second lifting mechanism 23.

[0060] After the copper mesh sleeve 3 is formed, the first driving mechanism 16 drives the turntable 15 to rotate to a set angle, and the copper mesh sleeve 3 and the core rod 2 are transported to the copper mesh installation station, and the copper tube 1 is vertically fixed to the positioning block 22. After the copper tube 1 is fixed, it is coaxial with the core rod 2. Then the first lifting mechanism 19 is used to push the positioning seat 20 and the copper tube 1 to move upward, so that the core rod 2 passes through the copper tube 1; then the connecting mechanism connects the second lifting mechanism 23 with the driving rod 6, and the second lifting mechanism 23 is used to drive the driving rod 6 to move axially to complete the expansion of the copper mesh sleeve 3. After the expansion, the second driving mechanism 17 drives the core rod 2 to rotate to a set angle, and the second lifting mechanism 23 drives the driving rod 6 to move axially again, pressing the remaining parts of the copper mesh sleeve 3 and the docking interface 5.

[0061] After the installation is completed, the connection between the driving rod 6 and the second lifting mechanism 23 is released, and the first lifting mechanism 19 drives the positioning seat 20, the copper tube 1, etc. to move downward as a whole, so that the copper tube 1 is separated from the core rod 2, and then the copper tube 1 is removed from the positioning block 22. The core rod 2 moves to the net rolling station along with the turntable 15.

[0062] In the present invention, Fig.10 As shown, the connecting mechanism includes an upper plate 26 and a lower plate 27, and there is a spacing between the upper plate 26 and the lower plate 27. The spacing between the upper plate 26 and the lower plate 27 is slightly larger than the thickness of the connecting block 29, and the upper plate 26 and the lower plate 27 are connected as a whole through a connecting column 30, and the lower plate 27 is fixedly connected to the second lifting mechanism 23. A rectangular hole 28 is provided on the upper plate 26, and a rectangular connecting block 29 is provided at the lower end of the driving rod 6. The length of the connecting block 29 is smaller than the length of the rectangular hole 28, the width of the connecting block 29 is smaller than the width of the rectangular hole 28, the length of the connecting block 29 is larger than the width of the rectangular hole 28, and the length of the connecting block 29 is smaller than the inner diameter of the copper tube 1, so as to ensure that the connecting block 29 can pass through the copper tube 1.

[0063] When the first lifting mechanism 19 pushes the positioning seat 20 and the copper tube 1 to move upward, the length direction of the connecting block 29 is parallel to the length direction of the rectangular hole 28, and the connecting block 29 passes through the rectangular hole 28 and reaches between the upper plate 26 and the lower plate 27. Then, the second driving mechanism 17 is used to drive the core rod 2 and the driving rod 6 to rotate as a whole at a set angle, so that the length direction of the connecting block 29 forms an acute angle, a right angle or an obtuse angle with the length direction of the rectangular hole 28. At this time, the connecting block 29 cannot pass through the rectangular hole 28. When the second lifting mechanism 23 drives the upper plate 26 and the lower plate 27 to move up and down, the driving rod 6 can be driven to move axially. After the copper mesh is installed, the second driving mechanism 17 drives the core rod 2 and the driving rod 6 to rotate, so that the connecting block 29 returns to the initial angle, that is, the length direction of the connecting block 29 is parallel to the length direction of the rectangular hole 28. When the positioning seat 20 moves downward, the connecting block 29 can be separated from the rectangular hole 28 and the connection with the connecting mechanism is released.

[0064] In the present invention, in order to improve the compression effect of the copper mesh sleeve 3, the outer wall of the expansion block 4 is an arc-shaped wall, and the diameter of the arc-shaped wall is consistent with the inner hole diameter of the copper mesh sleeve 3 after expansion, which can ensure that the outer wall of the expansion block 4 is in full contact with the copper mesh sleeve 3, and the copper mesh sleeve 3 fits better with the inner wall of the copper tube 1.

[0065] The number of the hole-expanding blocks 4 may be four, or may be three, five, six, etc.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A copper mesh installation method, characterized in that: The following steps are involved: S1, cutting the copper mesh according to the size of the copper tube (1) to obtain a copper mesh sheet, wherein the length of the copper mesh sheet is the same as the length of the copper tube (1), and the width of the copper mesh sheet is π times the diameter of the inner hole of the copper tube (1); S2, curling the copper mesh onto the core rod (2) to form a copper mesh sleeve (3), with one side edge of the copper mesh covering the other side edge, so that the outer diameter of the copper mesh sleeve (3) is smaller than the inner diameter of the copper tube (1); S3, inserting the mandrel (2) together with the copper mesh sleeve (3) into the copper tube (1); S4, expanding the copper mesh sleeve (3) so that the copper mesh sleeve (3) fits the inner wall of the copper tube (1), and pulling out the core rod (2).

2. The copper mesh installation method according to claim 1, characterized in that: The mandrel (2) is a hollow rod, and the outer wall of the mandrel (2) is provided with a plurality of axially extending positioning grooves, the positioning grooves are evenly distributed around the center line of the mandrel (2), and a hole expansion block (4) is provided in each positioning groove, the hole expansion block (4) and the positioning groove are radially slidably matched with the mandrel (2), and the hole expansion block (4) is connected to a hole expansion drive assembly; In step S2, the hole expansion block (4) is located in the positioning groove; In step S4, the hole expansion drive assembly drives each hole expansion block (4) to move radially outward synchronously, and after the hole expansion block (4) contacts the copper mesh sleeve (3), it pushes the copper mesh sleeve (3) to be close to the inner wall of the copper tube (1); then the hole expansion drive assembly drives each hole expansion block (4) back to the positioning groove to pull out the core rod (2).

3. The copper mesh installation method according to claim 2, characterized in that: In step S2, after the copper mesh is curled on the core rod (2), two side edges of the copper mesh are located between two adjacent positioning grooves; In step S4, after the hole expansion drive component drives each hole expansion block (4) back into the positioning groove, the core rod (2) rotates to a set angle so that one of the positioning grooves is aligned with the docking interface (5) on both sides of the copper mesh sleeve (3); the hole expansion drive component is used to drive each hole expansion block (4) to move radially outward synchronously again, and the hole expansion block (4) is pressed against the copper mesh sleeve (3) and the docking interface (5) again.

4. The copper mesh installation method according to claim 2 or 3, characterized in that: The reaming drive assembly comprises a driving rod (6) arranged inside the core rod (2), the outer wall of the driving rod (6) is provided with a plurality of first bosses (7) and a plurality of second bosses (8), the inner wall of each reaming block (4) is provided with a third boss (9) and a fourth boss (10), the number of the third bosses (9) is the same as the number of the first bosses (7), and the number of the fourth bosses (10) is the same as the number of the second bosses (8); the first boss (7) is provided with a first inclined surface (11) on the side wall facing the reaming block (4), and the third boss (9) is provided with a second inclined surface (12) on the side wall facing the driving rod (6); the second boss (8) and the fourth boss (10) both comprise a radial section and an axial section, and the radial section and the axial section are The axial sections of the second boss (8) are distributed in an L-shape, the axial section of the second boss (8) is provided with a third inclined surface (13) toward the side wall of the driving rod (6), and the axial section of the fourth boss (10) is provided with a fourth inclined surface (14) toward the side wall of the expansion block (4), the fourth inclined surface (14) is parallel to the first inclined surface (11), and the third inclined surface (13) is parallel to the second inclined surface (12); when the driving rod (6) drives the first boss (7) to move axially toward the third boss (9), the first inclined surface (11) fits the second inclined surface (12); when the driving rod (6) drives the second boss (8) to move axially toward the fourth boss (10), the axial section of the second boss (8) enters the inner side of the axial section of the fourth boss (10), and the third inclined surface (13) fits the fourth inclined surface (14).

5. The copper mesh installation method according to claim 4, characterized in that: The mandrel (2) is installed on the installation machine, and a horizontal turntable (15) is provided on the installation machine. The turntable (15) is connected to a first driving mechanism (16) for driving the turntable (15) to rotate. A mesh rolling station and a copper mesh installation station are provided below the turntable (15). The mesh rolling station and the copper mesh installation station are both provided with a mandrel (2). The mandrel (2) is vertically arranged, and the upper end of the mandrel (2) is installed on the turntable (15) through a bearing. Each mandrel (2) is connected to a second driving mechanism (17) for driving the mandrel (2) to rotate. The mesh rolling station is provided with a movable frame (18), and the movable frame (18) is connected to a translation driving mechanism (24). A vertical movement mechanism (24) is provided on the movable frame (18). A straight curling shaft (25), both ends of which are mounted on a movable frame (18) via bearings, and a curling gap is provided between the curling shaft (25) and a core rod (2) of a mesh rolling station; a first lifting mechanism (19) is provided below the copper mesh installation station, a positioning seat (20) is provided at the top of the first lifting mechanism (19), a positioning block (22) is provided on the positioning seat (20) via a bracket (21), and a copper tube positioning mechanism is provided in the positioning block (22); a second lifting mechanism (23) is provided on the positioning seat (20) below the positioning block (22), and a connecting mechanism for connecting a driving rod (6) is provided at the upper end of the second lifting mechanism (23); In step S2, one side of the copper mesh is manually inserted into the curling gap, and the translation drive mechanism (24) pushes the movable frame (18) to move toward the core rod (2), so that the curling shaft (25) presses the side of the copper mesh, and then the second drive mechanism (17) drives the core rod (2) to rotate 360 ​​degrees, so that the copper mesh is curled on the core rod (2), and then the translation drive mechanism (24) is used to push the movable frame (18) to reset, and the uncurled part of the copper mesh is manually curled to form a copper mesh sleeve (3); The first driving mechanism (16) drives the rotating disk (15) to rotate at a set angle, transports the copper mesh sleeve (3) together with the core rod (2) to the copper mesh installation station, and vertically fixes the copper tube (1) on the positioning block (22), and then uses the first lifting mechanism (19) to push the positioning seat (20) and the copper tube (1) to move upward, so that the core rod (2) passes through the copper tube (1); then the connecting mechanism connects the second lifting mechanism (23) with the driving rod (6), and uses the second lifting mechanism (23) to drive the driving rod (6) to move axially, thereby completing the expansion of the copper mesh sleeve (3).

6. The copper mesh installation method according to claim 5, characterized in that: The connecting mechanism comprises an upper plate (26) and a lower plate (27), wherein a distance is provided between the upper plate (26) and the lower plate (27), and the upper plate (26) and the lower plate (27) are connected as a whole through a connecting column (30), wherein the lower plate (27) is fixedly connected to the second lifting mechanism (23), wherein a rectangular hole (28) is provided on the upper plate (26), and a rectangular connecting block (29) is provided at the lower end of the driving rod (6), wherein the length of the connecting block (29) is less than the length of the rectangular hole (28), the width of the connecting block (29) is less than the width of the rectangular hole (28), and the length of the connecting block (29) is greater than the width of the rectangular hole (28); When the first lifting mechanism (19) pushes the positioning seat (20) and the copper tube (1) to move upward, the length direction of the connecting block (29) is parallel to the length direction of the rectangular hole (28), and the connecting block (29) passes through the rectangular hole (28) and reaches between the upper plate (26) and the lower plate (27). Then, the second driving mechanism (17) drives the core rod (2) and the driving rod (6) to rotate as a whole at a set angle, so that the length direction of the connecting block (29) forms an acute angle, a right angle or an obtuse angle with the length direction of the rectangular hole (28). When the second lifting mechanism (23) is lifted or lowered, the driving rod (6) can be driven to move axially.

7. The copper mesh installation method according to claim 2 or 3, characterized in that: The outer wall of the hole-expanding block (4) is an arc-shaped wall, and the diameter of the arc-shaped wall is consistent with the inner hole diameter of the copper mesh sleeve (3) after hole expansion.

8. The copper mesh installation method according to claim 2 or 3, characterized in that: There are four hole expansion blocks (4).

9. A heat pipe comprising a copper tube (1) and a copper mesh capillary layer arranged on the inner wall of the copper tube (1), characterized in that: The copper mesh capillary layer is prepared by the method described in any one of claims 1 to 8.

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