A heat pipe production welding device

Abstract

The application discloses a heat conduction pipe production welding device and relates to the heat conduction pipe welding field.The device comprises an inner support rod, the surface of which is coated with an expansion layer, and a flow guide channel is arranged in the inner support rod; the expansion layer has a tight state and a contraction state; when in the contraction state, the expansion layer is tightly attached to the surface of the inner support rod, and the maximum diameter of the inner support rod and the expansion layer is smaller than the diameter of the heat conduction pipe and the circular pipe; the heat conduction pipe production welding device is characterized in that the inner support rod and the expansion layer arranged thereon are used, so that the inner support rod can easily enter the middle part of the heat conduction pipe and the circular pipe with a small diameter when the expansion layer is in the contraction state, and the gap caused by the fact that the diameter of the inner support rod is smaller than the diameter of the heat conduction pipe and the circular pipe can be compensated for when the expansion layer is in the tight state, the coaxiality during welding is ensured, the welding effect is improved, and meanwhile, the expansion layer is switched to the contraction state after the welding is completed, so that the gap is formed again, thereby facilitating the removal of the inner support rod from the inner wall of the heat conduction pipe and the circular pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to heat pipe welding technology, in particular to a heat pipe production welding device. BACKGROUND

[0002] The heat pipe needs to be filled with medium during production, and the heat pipe needs to be connected with a circular pipe and communicated with a medium conveying device for charging operation. The end of the circular pipe and the heat pipe is generally connected in the form of welding. In a Chinese invention patent with publication number CN114227131A, a micro heat pipe welding auxiliary device and a welding method are disclosed. The micro heat pipe and the process circular pipe are precisely welded by setting the welding auxiliary device. The device mainly sets a locking assembly, a support and guide assembly, and a perforating needle to make the heat pipe coaxial with the process circular pipe and the welding position tightly fit, thereby improving the welding precision. Although the device is used for welding the micro heat pipe, it is also suitable for welding heat pipes of conventional sizes.

[0003] However, in order to facilitate the insertion and removal of the perforating needle, the diameter of the perforating needle needs to be smaller than the inner diameter of the heat pipe and the circular pipe. This causes a certain gap between the surface of the perforating needle and the inner wall of the heat pipe and the process circular pipe. The existence of the gap may cause the heat pipe and the process circular pipe to not be in the best coaxial state when they are tightly fit. Especially when the wall thickness of the process circular pipe and the heat pipe is thin and different, the wall thickness and the coaxiality have a certain relationship (when the wall thickness of both is thick, the low coaxiality generally does not affect the connection after welding and can be ignored, when the wall thickness is thin, the lower the coaxiality, the greater the influence on the welding effect). The existence of the gap may cause the heat pipe and the process circular pipe to not be completely connected during welding, which affects the subsequent medium filling. SUMMARY

[0004] The purpose of the present application is to provide a heat pipe production welding device to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a heat pipe production welding device for coaxial welding of a heat pipe and a circular pipe, comprising:

[0006] The inner support rod is coated with an expansion layer, and a flow guide channel for inputting or outputting fluid between the expansion layer and the inner support rod is formed in the inner support rod. The expansion layer has a tight state and a contraction state. In the contraction state, the expansion layer tightly adheres to the surface of the inner support rod, and the maximum diameter of the inner support rod and the expansion layer is smaller than the diameter of the heat pipe and the circular pipe. A blocking piece is arranged at a first position and / or a second position on the axis of the inner support rod, wherein the first position and the second position are respectively located at the two end positions of the support rod. The inner support rod is inserted into the heat pipe and the circular pipe in the contraction state, then the heat pipe or the circular pipe is moved to make the heat pipe and the circular pipe tightly fit each other under the cooperation of the blocking piece, and finally the expansion layer is switched to the expansion state to fix the heat pipe and the circular pipe coaxially;

[0007] Welding mechanism for welding the abutment of heat conducting pipe and round pipe.

[0008] Further, the inner support rod is mounted on the fixed seat, and one side of the fixed seat is connected with a moving part for driving the fixed seat to move along the axis direction of the inner support rod.

[0009] Further, the moving part comprises a first track arranged on the workbench, and a first sliding block is slidably connected to the first track, wherein the first track is arranged along the axis direction of the inner support rod, the top of the first sliding block is connected with the fixed seat, and one side of the first sliding block is connected with an A driving part for driving the first sliding block to move along the first track.

[0010] Further, the blocking part is provided with two, which are respectively located in the first position and the second position, and one blocking part is arranged on one side of the fixed seat and moves with the fixed seat.

[0011] Further, a buffer mechanism is arranged between the fixed seat and the adjacent blocking part, and the buffer mechanism comprises a buffer plate, one end of the buffer plate is slidably connected with the inner wall of the fixed seat, the other end of the buffer plate is fixedly connected with the blocking part, and the end of the buffer plate close to the blocking part is provided with a first spring on one side of the fixed seat.

[0012] Further, a cylindrical movable cavity is arranged in the fixed seat, a piston plate is slidably connected in the movable cavity, one side of the piston plate is fixedly connected with one end of the buffer plate, and a first channel for connecting the movable cavity with an external air source and a second channel for connecting the movable cavity with a flow guide channel are arranged on the fixed seat.

[0013] Further, the fixed seat is mounted on the first sliding table through a rotating part, and the rotating part is used for driving the fixed seat to rotate around the central axis of the inner support rod.

[0014] Further, the blocking part is provided with one and arranged on one side of the fixed seat, the blocking part is slidably connected with the inner wall of the fixed seat, and a second spring is connected between the blocking part and the inner wall of the fixed seat.

[0015] Further, the inner support rod is composed of a first rod, a second rod and a third rod, one end of the first rod is rotatably connected with the fixed seat, the second rod penetrates through the first rod and the inner wall of the fixed seat and is movably connected with the first rod and the inner wall of the fixed seat, one end of the third rod is rotatably connected with the surface of one end of the second rod, the surfaces of the first rod and the third rod are covered with an expansion layer, the flow guide channels are arranged in the first rod and the third rod, the second rod is hollow, and the arc-shaped channel is arranged on the second rod close to the middle position of the first rod, and the annular channel is arranged on the second rod close to one end of the third rod.

[0016] Further, the blocking part is fixedly connected with a sliding nail on one side close to the first rod, the surface of the first rod is provided with an inclined groove, the sliding is slidably connected with the inclined groove, and the sliding drives the first rod to rotate when moving on the inclined groove.

[0017] Compared with the prior art, the heat pipe production welding device provided by the application has the following beneficial effects:

[0018] The heat pipe production welding device, by setting the inner support rod and the expansion layer thereon, the expansion layer is tightly expanded against the inner wall of the heat pipe and the circular pipe, so that the two are in a relatively coaxial state, and the inner support rod can easily enter the middle part of the heat pipe and the circular pipe with a smaller diameter when the expansion layer is in a contracted state, and when the expansion layer is in a tight state, the gap caused by the smaller diameter of the inner support rod than the diameter of the heat pipe and the circular pipe can be compensated, so that the inner support rod is tightly attached to the inner wall of the heat pipe and the circular pipe, the coaxiality during welding is ensured, and the welding effect is improved. At the same time, after the welding is completed, the expansion layer is switched to the contracted state, so that the gap is formed again, thereby facilitating the removal of the inner support rod from the inner wall of the heat pipe and the circular pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0020] Figure 1 The overall structure schematic diagram provided by the embodiment of the application;

[0021] Figure 2 The overall structure schematic diagram provided by the embodiment of the application; Figure 1 The enlarged view of A in the above figure;

[0022] Figure 3 The overall structure schematic diagram provided by the embodiment of the application; Figure 1 The partial longitudinal section structure schematic diagram of the above figure;

[0023] Figure 4 The overall structure schematic diagram provided by the embodiment of the application; Figure 3 The enlarged view of B in the above figure;

[0024] Figure 5 The overall structure schematic diagram provided by the embodiment of the application; Figure 3 The enlarged view of C in the above figure;

[0025] Figure 6 The cross-sectional view of the inner support rod provided by the embodiment of the application;

[0026] Figure 7 The partial cross-sectional view of the fixed seat after the installation of the buffer mechanism provided by the embodiment of the application;

[0027] Figure 8 The overall structure schematic diagram of another inner support rod provided by the embodiment of the application;

[0028] Figure 9 A structural schematic diagram of the inner support rod in a separated state is provided for an embodiment of the present application.

[0029] Figure 10 A structural schematic diagram of the inner support rod in a separated state is provided for an embodiment of the present application. Figure 9 An enlarged view of D in the middle;

[0030] Figure 11 A structural schematic diagram of the inner support rod in a separated state is provided for an embodiment of the present application. Figure 9 An enlarged view of E in the middle.

[0031] Legend of reference signs:

[0032] 1, inner support rod; 11, first rod; 12, second rod; 13, third rod; 14, arc-shaped channel; 15, annular channel; 16, inclined chute; 2, expansion layer; 3, flow guide channel; 4, blocking piece; 41, connecting plate; 42, baffle; 43, rotating column; 44, sliding nail; 5, fixed seat; 51, movable cavity; 52, piston plate; 53, first channel; 54, second channel; 6, moving piece; 61, workbench; 62, first rail; 63, first sliding block; 64, support frame; 7, buffer mechanism; 71, buffer plate; 72, first spring; 73, guide rod; 74, second spring; 8, rotating piece; 81, annular rack; 82, first gear;

[0033] 100, heat conduction pipe; 200, round pipe. DETAILED DESCRIPTION

[0034] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0035] Embodiment, please refer to Figure 1 - Figure 11 A heat conduction pipe 100 production welding device for coaxial welding of the heat conduction pipe 100 and the round pipe 200, the welding device comprising:

[0036] The inner support rod 1 is coated with an expansion layer 2 on the surface, and a flow guide channel 3 for inputting or outputting fluid between the expansion layer 2 and the inner support rod 1 is arranged inside the inner support rod 1. The expansion layer 2 has a tight state and a shrinkage state. In the shrinkage state, the expansion layer 2 is tightly attached to the surface of the inner support rod 1, and the maximum diameter of the inner support rod 1 and the expansion layer 2 is smaller than the diameter of the heat conduction pipe 100 and the round pipe 200. The blocking piece 4 is arranged at the first position and / or the second position on the axis of the inner support rod 1, wherein the first position and the second position are respectively located at the two end positions of the support rod. In the shrinkage state, the inner support rod 1 is inserted into the heat conduction pipe 100 and the round pipe 200, and then the heat conduction pipe 100 or the round pipe 200 is moved to make the heat conduction pipe 100 and the round pipe 200 tightly abut against each other under the cooperation of the blocking piece 4, and finally the expansion layer 2 is switched to the expansion state to coaxially fix the heat conduction pipe 100 and the round pipe 200.

[0037] A welding mechanism is arranged to weld the abutting position of the heat conducting pipe 100 and the circular pipe 200.

[0038] Before welding, the heat conducting pipe 100 and the circular pipe 200 are sequentially arranged on the surface of the inner supporting rod 1 by the inner supporting rod 1 arranged, and the heat conducting pipe 100 and the circular pipe 200 should be at least partially arranged on the area of the expansion layer 2, so that the heat conducting pipe 100 and the circular pipe 200 are close to each other and abut against each other, and the heat conducting pipe 100 and the circular pipe 200 can be moved in a manual manner or by a moving part 6 arranged to drive the heat conducting pipe 100 or the circular pipe 200 to move, such as a mechanical hand, and the end surfaces of the heat conducting pipe 100 and the circular pipe 200 to be welded are attached to each other after abutting against each other, but the coaxiality is poor, and the coaxiality of the heat conducting pipe 100 and the circular pipe 200 cannot be improved by only the inner supporting rod 1 arranged, and the reason has been described above and will not be described in detail here. Therefore, the fluid with a certain pressure outside is delivered to the expansion layer 2 through the flow channel 3 arranged, so that the expansion layer 2 is switched to a tight state, the inner wall of the heat conducting pipe 100 and the circular pipe 200 is abutted by the expansion layer 2 in the tight state, so that the heat conducting pipe 100 and the circular pipe 200 are in a relatively coaxial state, and then welding is performed. By this way, the inner supporting rod 1 can easily enter the middle part of the heat conducting pipe 100 and the circular pipe 200 when the expansion layer 2 is in a contraction state, and the gap between the inner supporting rod 1 and the heat conducting pipe 100 and the circular pipe 200 can be compensated when the expansion layer 2 is in a tight state, so that the inner supporting rod 1 is tightly attached to the inner wall of the heat conducting pipe 100 and the circular pipe 200, the coaxiality during welding is ensured, and the welding effect is improved. Meanwhile, after the welding is completed, the expansion layer 2 is switched to a contraction state, so that the gap is formed again, and the inner supporting rod 1 is removed from the inner wall of the heat conducting pipe 100 and the circular pipe 200;

[0039] In an embodiment of the present application, the fluid can be a gas or a liquid, and is preferably a gas, and the flow channel 3 is connected with an external gas source device.

[0040] During welding of the welding structure, the heat conducting pipe 100 and the circular pipe 200 can be welded by rotating the heat conducting pipe 100 and the circular pipe 200, or the welding mechanism can be installed on a ring track and welded by rotating around the connection position of the heat conducting pipe 100 and the circular pipe 200. Since it is a prior art, it will not be described in detail here, and it is not drawn in the figure.

[0041] In an embodiment of the present application, the inner supporting rod 1 is installed on the fixed seat 5, one side of the fixed seat 5 is connected with the moving part 6, and the moving part 6 is used to drive the fixed seat 5 to move along the axis direction of the inner supporting rod 1.

[0042] In one embodiment of the present application, the moving part 6 comprises a first track 62 arranged on the workbench 61, a first sliding block 63 is slidingly connected on the first track 62, wherein the first track 62 is arranged along the axis direction of the inner support rod 1, the top of the first sliding block 63 is connected with the fixed seat 5, and one side of the first sliding block 63 is connected with an A driving part (not shown in the figure) for driving the first sliding block 63 to move along the first track 62;

[0043] In one embodiment of the present application, the A driving part comprises a threaded rod, the surface of the threaded rod is threadedly connected with the inner wall of the first sliding block 63, and one end of the threaded rod is connected with the output end of an electric motor or a pneumatic motor or a hydraulic motor, so that the first sliding block 63 moves along the first track 62 by driving the threaded rod to rotate;

[0044] In one embodiment of the present application, the A driving part is a pneumatic cylinder or a hydraulic cylinder or an electric telescopic rod, the piston rod of the pneumatic cylinder or the hydraulic cylinder or the telescopic rod of the electric telescopic rod is connected with the first sliding block 63, and the cylinder body of the pneumatic cylinder or the hydraulic cylinder or the electric telescopic rod is arranged on the workbench 61 along the direction of the first track 62.

[0045] In one embodiment of the present application, two blocking parts 4 are arranged at the first position and the second position respectively, one of the blocking parts 4 is arranged on one side of the fixed seat 5 and moves with the fixed seat 5, and it should be understood that the blocking part 4 is relatively static with the inner support rod 1 at this time;

[0046] When the inner support rod 1 penetrates the heat conducting pipe 100 and the circular pipe 200 to be welded, the fixed seat 5 is moved by the A driving part, so that the inner support rod 1 and the heat conducting pipe 100 and the circular pipe 200 thereon are synchronously moved, in the process of moving, one side of the heat conducting pipe 100 or the circular pipe 200 will first contact one of the blocking parts 4, when the two pipe fittings (the heat conducting pipe 100 and the circular pipe 200) abut against the two blocking parts 4 respectively, the blocking part 4 on the fixed seat 5 will drive the pipe fitting abutting against it to move to the other pipe fitting, and finally abut against each other under the blocking of the two blocking parts 4, and the abutment is completed under a certain extrusion force, then the expansion layer 2 is switched to the tension state, so that the heat conducting pipe 100 and the circular pipe 200 can be moved to the relatively coaxial state, and it should be understood that the coaxial state here is not absolute, and still has a certain error, but the error has been greatly reduced compared with the prior art, and the error can be ignored in actual operation;

[0047] It should be noted that the heat pipe 100 and the circular pipe 200 do not have a sequence when penetrating the inner support rod 1, and if one of them is not in the form of a penetrable length, there can also be a sequence, which does not affect the implementation of the scheme; in addition, when the heat pipe 100 and the circular pipe 200 are penetrated, the pipe fitting (any one of the heat pipe 100 or the circular pipe 200) that is first penetrated can be moved to the abutting state with the blocking piece 4 on the fixed seat 5, which can effectively shorten the stroke required when the pipe fitting is penetrated and penetrated out before and after the fixed seat 5 is welded.

[0048] When the heat pipe 100 and the circular pipe 200 are abutted by the cooperation of the two blocking pieces 4, a certain extrusion force is required, and if the extrusion force is small, the tightness of the abutment of the two is not enough, and separation may occur when the expansion layer 2 is tightened, and once the separation gap reaches a certain degree, it will affect the welding, and if the extrusion force is large, it is easy to cause the heat pipe 100 or the circular pipe 200 to be not easy to move when the expansion layer 2 is tightened, and it is difficult to move the two to the coaxial state under the tightening state of the expansion layer 2, and if the fluid pressure is further increased, the stress on the pipe fitting is large and it is easy to be damaged. The existing mode usually sets a force sensor and a corresponding control system between the fixed seat 5 and the moving piece 6 for control, although the scheme can also be implemented in this mode, but the debugging process is more tedious and the equipment cost is also higher, therefore, an implementation mode for solving the above problems is proposed, in particular:

[0049] The buffer mechanism 7 is arranged between the fixed seat 5 and the adjacent blocking piece 4, and the buffer mechanism 7 comprises a buffer plate 71, one end of the buffer plate 71 is slidably connected with the inner wall of the fixed seat 5, the other end of the buffer plate 71 is fixedly connected with the blocking piece 4, and the end of the buffer plate 71 close to the blocking piece 4 is provided with a first spring 72 on one side of the fixed seat 5;

[0050] In an embodiment of the present application, in order to improve the stability of the buffer mechanism 7 when it acts, at least two buffer plates 71 can be arranged, which are arranged in an annular array on the circumferential side of the end of the inner support rod 1, and the blocking piece 4 is annular and is slidably arranged on the surface of the inner support rod 1, and a plurality of connecting plates 41 are connected to the circumferential side of the blocking piece 4 and are connected to one side of the buffer plate 71 one by one;

[0051] When the heat pipe 100 and the circular pipe 200 abut under the cooperation of the two blocking pieces 4, further moving the fixed seat 5 will make the two abut against each other, and at this time the first spring 72 starts to be compressed, and at this time the extrusion force of the heat pipe 100 and the circular pipe 200 when abutting will be related to the compression degree of the first spring 72, and within a suitable range of extrusion force, a suitable compression distance of the first spring 72 can be obtained;

[0052] The implementation scenario is specifically (omitting the process before the compression of the first spring 72):

[0053] The fixed seat 5 starts to move until the first spring 72 is compressed to a required compression distance range, at which the expansion layer 2 is switched to the tight state to act on the heat pipe 100 and the circular pipe 200 with a suitable tight force to make them coaxial;

[0054] It should be noted that the fixed seat 5 can continue to move to further compress the first spring 72, and since the expansion layer 2 has a certain deformation capacity, the further compression of the first spring 72 also corresponds to an increase in the extrusion force of the heat pipe 100 and the circular pipe 200 by the two blocking pieces 4, which will further precisely fit the two, avoiding a slight separation phenomenon between the two when the expansion layer 2 is tight.

[0055] The suitable compression range of the first spring 72 (hereinafter referred to as the first compression range) can be obtained by experiments, specifically by conventional means, which will not be described in detail here. After obtaining the suitable first compression range, the corresponding position can be marked, and the moving stroke of the A driving piece can be controlled or a proximity sensor can be arranged at the corresponding position to make the first spring 72 compressed to the first range before the expansion layer 2 works. In some embodiments, when the fixed seat 5 is manually moved, it can also be operated by artificial observation. The advantage of installing the first spring 72 in a visible position is that it is convenient for marking during experiments or artificial operation. Figure 2 and Figure 5 As shown in the first spring 72, a guide rod 73 can also be arranged in the middle of the first spring 72, which provides a constraint and guiding effect and also marks the compression of the first spring 72.

[0056] In an embodiment of the present application, inspired by the above-mentioned embodiments, a switching mode of the expansion layer 2 between the contraction and tight states is proposed. Specifically, a cylindrical movable cavity 51 is arranged in the fixed seat 5, and a piston plate 52 is slidably connected in the movable cavity 51. One side of the piston plate 52 is fixedly connected with one end of a buffer plate 71. A first channel 53 for the movable cavity 51 to communicate with an external air source and a second channel 54 for the movable cavity 51 to communicate with the flow guide channel 3 are arranged on the fixed seat 5.

[0057] As shown in the first spring 72, a guide rod 73 can also be arranged in the middle of the first spring 72, which provides a constraint and guiding effect and also marks the compression of the first spring 72. Figure 7 As shown in the first spring 72, a guide rod 73 can also be arranged in the middle of the first spring 72, which provides a constraint and guiding effect and also marks the compression of the first spring 72.

[0058] The inflated state of the inflation layer 2 can be achieved by an external gas source device delivering gas with a certain pressure, the external gas source device including but not limited to an air compressor with a pressure regulator, the deflated state of the inflation layer 2 can be achieved by switching the gas guide channel to be in communication with a negative pressure device, which is also a common knowledge in the prior art, and will not be described in detail here, it should be noted that the negative pressure device can also be disconnected, and the inflation layer 2 will automatically discharge a certain amount of gas to partially deflate, which can further discharge gas when the combined pipe is taken out after welding without affecting its removal, but this way will make it difficult for the inflation layer 2 to deflate completely, and the pipe will still be partially blocked. In the embodiment, the negative pressure device is preferably used to switch the inflation layer 2 to the deflated state.

[0059] In an embodiment of the present application, the fixed seat 5 is mounted on the first sliding table through a rotating piece 8, which is used to drive the fixed seat 5 to rotate around the central axis of the inner support rod 1, and the fixed seat 5 drives the inner support rod 1 and the heat conducting pipe 100 and the circular pipe 200 fixed thereon to rotate when rotating, thereby facilitating the welding of the abutting positions of the two.

[0060] In an embodiment of the present application, the rotating piece 8 includes an annular rack 81 arranged on the side of the fixed seat 5, and a first gear 82 is engaged and connected on one side of the annular rack 81, and the first gear 82 is connected with an electric motor or a pneumatic motor or a hydraulic motor for driving the rotation thereof.

[0061] In an embodiment of the present application, the blocking piece 4 away from the fixed seat 5 is fixedly installed on the workbench 61, and the blocking piece 4 includes a baffle 42, a rotating column 43 is rotatably installed on the side of the baffle 42 close to the fixed seat 5, the end of the rotating column 43 is conical, and the axis of the rotating column 43 coincides with the axis of the inner support rod 1.

[0062] In an embodiment of the present application, two support frames 64 are also installed on the workbench 61, which are respectively used to support the heat conducting pipe 100 and the circular pipe 200, and the top of the support frame 64 is V-shaped in longitudinal section, and in use, the heat conducting pipe 100 and the circular pipe 200 are placed on the two support frames 64, and the height of the support frame 64 is set so that the heat conducting pipe 100 and the circular pipe 200 are substantially on the axis of the inner support rod 1, and when the fixed seat 5 is moved, the inner support rod 1 can penetrate into the heat conducting pipe 100 and the circular pipe 200.

[0063] In an embodiment of the present application, for different heat conducting pipes 100, one end is not a straight cylinder, and some heat conducting pipes 100 have a certain degree of curvature, which makes the heat conducting pipe 100 unable to cooperate with the blocking piece 4, so the mode of setting two blocking pieces 4 cannot continue to operate the heat conducting pipe 100, and another mode is proposed, specifically, one blocking piece 4 is arranged on one side of the fixed seat 5.

[0064] The blocking piece 4 is in sliding connection with the inner wall of the fixed seat 5, and a second spring 74 is connected between the blocking piece 4 and the inner wall of the fixed seat 5;

[0065] The inner support rod 1 is composed of a first rod 11, a second rod 12 and a third rod 13. The first rod 11 is rotationally connected to the fixed seat 5 at one end. The second rod 12 penetrates through the first rod 11 and the inner wall of the fixed seat 5 and is movably connected to the first rod 11 and the inner wall of the fixed seat 5. The third rod 13 is rotationally connected to the surface of one end of the second rod 12. The surfaces of the first rod 11 and the third rod 13 are covered with an expansion layer 2. The first rod 11 and the third rod 13 are both hollow. An arc-shaped channel 14 is formed in the second rod 12 at a position close to the middle of the first rod 11. A ring-shaped channel 15 is formed in the second rod 12 at a position close to one end of the third rod 13.

[0066] As shown in Figure 8 , one end of the second rod 12 is mounted on the workbench 61 through a support. A channel is formed in the end of the second rod 12 to connect the hollow inside of the second rod 12 with the external air source.

[0067] It should be noted that the ring-shaped channel 15 is always in communication with the flow guide channel 3 at the position of the third rod 13. The arc-shaped channel 14 is in communication with the flow guide channel 3 of the first rod 11 and can be controlled by rotation. That is, after the first rod 11 is rotated by a certain angle, the arc-shaped channel 14 is in communication with the flow guide channel 3. At other angles, the arc-shaped channel 14 is located at the inner wall of the first rod 11 and abuts and closes.

[0068] The blocking piece 4 is fixedly connected to the slide pin 44 at a position close to the first rod 11. A slanted groove 16 is formed in the surface of the first rod 11. The slide pin 44 is in sliding connection with the slanted groove 16. When the slide pin 44 moves on the slanted groove 16, the first rod 11 is driven to rotate.

[0069] In use, the heat-conducting pipe 100 and the circular pipe 200 (the circular pipe 200 is first inserted into the first rod 11) to be welded are inserted into the inner support rod 1. Then, the expansion layer 2 of the third rod 13 is switched to the tight state to fix the heat-conducting pipe 100. Then, the fixed seat 5 is moved to make the blocking piece 4 push the circular pipe 200 to move. After the circular pipe 200 abuts against the heat-conducting pipe 100, the blocking piece 4 moves relative to the fixed seat 5 and compresses the second spring 74. When the blocking piece 4 moves, the first rod 11 is driven to rotate by the slide pin 44. The arc-shaped channel 14 is rotated to the flow guide channel 3 of the first rod 11, so that the expansion layer 2 on the first rod 11 is switched to the tight state. The heat-conducting pipe 100 is coaxial with the circular pipe 200. After welding, the fixed seat 5 is driven to return. The second spring 74 is decompressed and pushes the welded pipe to move. The first rod 11 is rotated to the initial position, so that the flow guide channel 3 of the first rod 11 is closed.

[0070] It should be noted that for some heavy heat pipe 100, auxiliary supporting device can be used to support it, so as to prevent the inner supporting rod 1 from being deformed when the third rod 13 fixes the heat pipe 100.

[0071] The foregoing merely illustrates some exemplary embodiments of the present application, no doubt numerous modifications can be made by those skilled in the art without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions should not be understood as limiting the scope of the present application.

Claims

1. A heat pipe production welding device for coaxially welding a heat pipe and a circular pipe, characterized by, The utility model relates to a kind of coaxial fixing device of heat pipe and round pipe, including: Inner support rod, its surface is coated with expansion layer, inner support rod inside is set with the guide channel for input or output fluid between expansion layer and inner support rod, expansion layer has tight state and shrinkage state, when shrinkage state, expansion layer is tightly attached to the surface of inner support rod, and the maximum diameter of inner support rod and expansion layer is less than the diameter of heat pipe and round pipe;The first position and the second position on the axis of inner support rod are located at the two end positions of inner support rod respectively, and the first position or the second position on the axis of inner support rod is provided with a blocking piece;In the shrinkage state, inner support rod is inserted into heat pipe and round pipe, then heat pipe or round pipe is moved to make heat pipe and round pipe abut each other under the cooperation of blocking piece, and finally expansion layer switches to expansion state to fix heat pipe and round pipe coaxially; Welding mechanism is used for welding the abutment of heat pipe and round pipe; The inner support rod is mounted on the fixed seat, one side of the fixed seat is connected with the moving part, and the moving part is used to drive the fixed seat to move along the axis direction of the inner support rod; The blocking piece is provided with one and is arranged on one side of the fixed seat, the blocking piece is slidably connected with the inner wall of the fixed seat, and a second spring is connected between the blocking piece and the inner wall of the fixed seat; The inner support rod is composed of a first rod, a second rod and a third rod, one end of the first rod is rotatably connected with the fixed seat, the second rod penetrates the first rod and the inner wall of the fixed seat and is movably connected with the first rod and the inner wall of the fixed seat, one end of the third rod is rotatably connected with the surface of one end of the second rod, the surfaces of the first rod and the third rod are coated with expansion layer, and the guide channels are arranged in the first rod and the third rod, the second rod is hollow, and the arc-shaped channel starts from the middle position close to the first rod, and the annular channel is arranged at one end close to the third rod of the second rod; The blocking piece is fixedly connected with a slide pin on one side close to the first rod, the surface of the first rod is provided with an inclined slot, the slide pin is slidably connected with the inclined slot, and the slide pin drives the first rod to rotate when moving on the inclined slot; The annular channel and the guide channel at the third rod are always in communication, the communication between the arc-shaped channel and the guide channel of the first rod can be rotationally controlled, that is, after the first rod rotates by a certain angle, the arc-shaped channel is in communication with the guide channel, and at other angles, the arc-shaped channel is abutted and closed at the inner wall of the first rod.

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