Quartz tube welding device and welding method

Abstract

A quartz tube welding device and method, comprising an external heating device and an internal heating welding device, wherein the external heating device is arranged on the outside of the quartz tube and is used to heat the outer wall of the quartz tube; the internal heating welding device comprises a first moving mechanism, a clamping mechanism and a first heating mechanism, wherein the first moving mechanism is arranged on the outside of the quartz tube, the first heating mechanism and the clamping mechanism are respectively arranged on the first moving mechanism, the first moving mechanism is used to extend the first heating mechanism and the clamping mechanism from one axial end of the quartz tube into the quartz tube, the clamping mechanism is used to clamp the weldment to be welded, and the first heating mechanism is used to heat the inner wall of the quartz tube and the weldment at the same time so that the two are melted and welded.

Description

Technical Field

[0001] The invention relates to the field of automation equipment, in particular to a quartz tube welding device and a welding method. Background Art

[0002] Quartz tubes have a series of excellent physical and chemical properties, such as high temperature resistance, corrosion resistance, good light transmittance and electrical insulation. They are the preferred tubes in the deep processing industry of quartz materials. The existing large-diameter photovoltaic quartz tubes can be more than 2m in size and are widely used in photovoltaic power generation, solar water heaters, semiconductors, electromagnetism and other fields. The inner wall of the quartz tube usually needs to be welded with multiple components, such as quartz parts, to meet its different application requirements. When welding such large-sized quartz tubes, there are the following problems: 1. Large-sized quartz tubes are difficult to position and cannot be clamped with conventional fixtures; 2. The welding of large quartz tubes is prone to bursting due to uneven heating inside and outside, and the yield is low; 3. A quartz empty tube welding weldment requires 5 to 6 senior welders to weld at the same time. Multi-position welding requires extremely high welding skills of welders and cooperation of welding engineers, and the entire welding process takes 2 to 3 hours. Its production capacity and welding quality are far behind the development of the current hot photovoltaic and semiconductor industries. Summary of the invention

[0003] The object of the present invention is to provide a quartz tube welding device and method to improve the above-mentioned problems or at least solve the above-mentioned technical problems to a certain extent.

[0004] In order to solve the above technical problems, the present invention provides a quartz tube welding device, including an external heating device and an internal heating welding device, wherein the external heating device is arranged on the outside of the quartz tube and is used to heat the outer wall of the quartz tube; the internal heating welding device includes a first moving mechanism, a clamping mechanism and a first heating mechanism, wherein the first moving mechanism is arranged on the outside of the quartz tube, the first heating mechanism and the clamping mechanism are respectively arranged on the first moving mechanism, the first moving mechanism is used to extend the first heating mechanism and the clamping mechanism from one axial end of the quartz tube into the quartz tube, the clamping mechanism is used to clamp the weldment to be welded, and the first heating mechanism is used to heat the inner wall of the quartz tube and the weldment so that the two are melted and welded.

[0005] In some embodiments, the internal heating welding device is located at one axial end of the quartz tube.

[0006] In some embodiments, the clamping mechanism includes a sliding cylinder and a fixed clamp block and a movable clamp block respectively connected to the sliding cylinder, and the weldment is clamped between the movable clamp block and the fixed clamp block, wherein the sliding cylinder is also connected to an upper water cooling plate and a lower water cooling plate, and a flame baffle is provided at the bottom end of the lower water cooling plate.

[0007] In some embodiments, the first moving mechanism includes a first moving component, a second moving component disposed on the first moving component, a third moving component disposed on the second moving component, and a robotic arm disposed on the second moving component, the first moving component is used to move the robotic arm in a first direction, the second moving component is used to move the robotic arm in a second direction, and the third moving component is used to move the robotic arm in a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0008] In some embodiments, the internal heating welding equipment also includes a movable fine-adjustment mechanism, which includes a first motor, a sliding connecting plate and a first guide rail. The first guide rail is fixed on the first movable mechanism, and the first guide rail extends along the second direction. The first motor is connected to the sliding connecting plate, and the sliding connecting plate is slidably connected to the first guide rail. The sliding connecting plate is also connected to the clamping mechanism. The first motor drives the sliding connecting plate to move on the first guide rail to adjust the distance between the weldment and the inner wall of the quartz tube in the second direction.

[0009] In some embodiments, the second moving component includes a second guide rail, a lift, a second motor and a moving plate. The second guide rail and the lift are arranged on the first moving component. The second guide rail extends along a second direction. The moving plate is slidably arranged on the second guide rail and can slide along the second guide rail. The moving plate is connected to the robotic arm. The lift is driven by the second motor to drive the moving plate to move along the second direction.

[0010] In some embodiments, the third moving component includes a third guide rail, a support end bearing seat, a fixed end bearing seat, a screw rod and a handwheel. The third guide rail and the fixed end bearing seat are arranged on the moving plate, and the third guide rail extends along the third direction. The robotic arm is slidably arranged on the third guide rail. The bottom end of the robotic arm is provided with the support end bearing seat. The support end bearing seat and the fixed end bearing seat are connected with the fixed end bearing seat through the screw rod. The end of the screw rod is provided with a handwheel. By rotating the handwheel, the relative distance between the support end bearing seat together with the robotic arm thereon and the fixed end bearing seat can be adjusted to drive the robotic arm to move in the third direction.

[0011] In some embodiments, the external heating device includes a pipe rotation mechanism, a second moving mechanism and a second heating mechanism. The pipe rotation mechanism is used to rotate the quartz tube around the central axis. The second heating mechanism is arranged on the second moving mechanism. The second moving mechanism can drive the second heating mechanism to move along the axial direction of the quartz tube.

[0012] In some embodiments, the pipe rotation mechanism includes multiple transmission shafts extending axially, each transmission shaft is fixed with multiple rollers, the rollers abut against the bottom end of the outer wall of the quartz tube, and the quartz tube is rotated around the central axis by rotating the transmission shaft.

[0013] Another aspect of the present invention provides a quartz tube welding method, comprising the following steps: moving a weldment to a welding position of the inner wall of the quartz tube to be welded; heating a heating position on the outer wall of the quartz tube, and simultaneously heating the welding position and the weldment, so that the welding position and the weldment are melted and welded, wherein the welding position and the heating position correspond to each other with respect to the inside and outside of the quartz tube wall.

[0014] The quartz tube welding device of the embodiment of the present invention adopts the synergistic effect of internal heating welding equipment and external heating equipment, wherein the internal heating welding device extends the weldment from one end of the quartz tube axis into the part to be welded inside the quartz tube. The internal heating welding device and the external heating device heat the inner and outer walls of the quartz tube at the same time, and accurately control the heating position and movement trajectory of the flame gun respectively, and effectively control the heating temperature and heating time of the welding. This enables a welding process device that can better improve welding accuracy and yield, adapt to the production capacity requirements of high-speed modern production lines, and reduce the labor welding cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a quartz tube welding device according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the external heating device structure;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A;

[0018] Figure 4 for Figure 2 A schematic diagram of a second heating mechanism;

[0019] Figure 5 for Figure 1 Schematic diagram of the internal heating welding equipment structure;

[0020] Figure 6 for Figure 5 A partial structural schematic diagram of a first moving mechanism;

[0021] Figure 7 for Figure 5 A partial structural schematic diagram of a first moving mechanism;

[0022] Figure 8 for Figure 5 A schematic structural diagram of a clamping mechanism, a first heating mechanism and a movable fine-tuning mechanism;

[0023] Fig. 9 for Figure 5 Schematic diagram of the clamping mechanism structure;

[0024] Fig.10 for Figure 5 A schematic structural diagram of a first heating mechanism;

[0025] Fig.11 for Figure 5 Schematic diagram of the mobile fine-tuning mechanism structure.

[0026] 100, quartz tube welding device; 10, external heating equipment; 11, first frame; 111, first layer; 112, second layer; 12, pipeline rotating mechanism; 121, third motor; 122, sprocket; 123, transmission shaft; 124, roller; 125, first bearing seat; 13, second moving mechanism; 131, fourth motor; 132, coupling; 133, driving synchronous wheel; 135; first belt; 134, second bearing seat; 136, fourth guide rail; 14, second heating mechanism; 141, sliding bracket; 142, seventh guide rail; 143, connecting rod; 20, internal heating welding equipment; 21, first moving mechanism; 211, second frame; 212, first moving assembly; 2121, fifth guide rail; 2122, sixth motor; 2123, driving wheel; 2124, driven wheel; 2125, second belt; 2126, third axis Support seat; 2127, moving seat; 213, second moving assembly; 2131, second guide rail; 2132, lifting machine; 2133, second motor; 2134, moving plate; 214, third moving assembly; 2141, third guide rail; 2142, support end bearing seat; 2143, fixed end bearing seat; 2144, screw rod; 2145, hand wheel; 215, mechanical arm; 22, clamping mechanism; 221, slide cylinder; 2 22. Sliding plate; 223. Fixed clamping block; 224. Movable clamping block; 225. Flame baffle; 226. Upper water-cooling plate; 227. Lower water-cooling plate; 23. First heating mechanism; 231. Seventh motor; 232. Cam; 233. Clamping member; 234. Connecting rod; 235. Sixth guide rail; 24. Mobile fine-tuning mechanism; 241. First motor; 242. Connecting plate; 243 First guide rail; 244. Sliding connecting plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only 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 this application.

[0028] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] It should also be noted that the directional terms such as upper, lower, inner, and outer in this embodiment are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0031] The technical solution adopted by the present invention is as follows: a quartz tube welding device 100. Figure 1 As shown, the welding device 100 includes an external heating device 10 and an internal heating welding device 20. The external heating device 10 is used to heat the heating point of the outer wall of the quartz tube. The internal heating welding device 20 is used to heat the welding point of the weldment and the inner wall of the quartz tube to weld the weldment to the inner wall of the quartz tube. Among them, the welding point and the heating point correspond to the inside and outside of the tube wall of the quartz tube. The outer wall of the quartz tube is heated by the external heating device 10 and the internal heating welding device 20 at the same time, so that the inner and outer walls of the quartz tube are heated evenly, avoiding the pipe from being broken or deformed due to uneven heating inside and outside the quartz tube. Usually, the weldment is a quartz part or other device that can be melted at high temperature.

[0032] Specifically, Figure 2 As shown, the external heating device 10 includes a first frame 11 and a pipe rotating mechanism 12, a second moving mechanism 13 and a second heating mechanism 14 arranged on the first frame 11. The pipe rotating mechanism 12 is used to support and rotate the quartz tube. The second heating mechanism 14 is used to heat the outer wall of the quartz tube. The second moving mechanism 13 is connected to the second heating mechanism 14, and is used to move the second heating mechanism 14 along the axial direction of the quartz tube, so that different places of the outer wall of the quartz tube can be heated. The axial and radial directions in this article are both the axial and radial directions of the quartz tube.

[0033] The first frame 11 is longitudinally shaped, and is divided into two layers, a first layer 111 and a second layer 112. A pipe rotating mechanism 12 is arranged on the first layer 111. The quartz tube is located on the pipe rotating mechanism 12, and the extension direction of the quartz tube is the same as the extension direction of the first frame 11. The pipe rotating mechanism 12 includes a third motor 121, a sprocket 122, a transmission shaft 123, a roller 124 and a first bearing seat 125. The transmission shaft 123 extends axially, and there are at least two of them. At least two transmission shafts 123 are fixed to the first frame 11 in parallel (in the front and rear directions in the figure) through the first bearing seat 125. A plurality of rollers 124 are provided on each transmission shaft 123, and the rollers 124 abut against the outer wall of the quartz tube, thereby carrying the quartz tube. The third motor 121 is connected to the transmission shaft 123 through the sprocket 122. When the third motor 121 is started, the driving sprocket 122 drives the transmission shaft 123 and the roller 124 thereon to rotate in the same direction, so that the roller 124 drives the quartz tube to rotate by friction. Preferably, multiple transmission shafts 123 are symmetrically arranged about the central axis of the quartz tube so that the quartz tube rotates around its central axis. The rollers 124 on each transmission shaft 123 are evenly distributed along the axial direction. Preferably, the sprocket 122 is a double-row sprocket. The third motor 121 and the reducer advance together through two sets of chains, driving the rollers 124 set on both sides of the bottom of the quartz tube to rotate simultaneously to ensure that the quartz tube can rotate smoothly around the central axis. The model of the third motor 121 in this embodiment is Leisai 110HS12Z. Optionally, the first motor is also connected to a reducer, and the reducer model is LRF120-L1-19-55.5-125.87-M8.

[0034] Please refer to Figure 2 and Figure 3 , the second moving mechanism 13 is arranged on the second layer 112 of the first frame 11. The second moving mechanism 13 is a belt translation mechanism, including a fourth motor 131, a coupling 132, an active synchronous wheel 133, a passive synchronous wheel (not shown), a second bearing seat 134, a first belt 135 and a fourth guide rail 136. The fourth guide rail 136 extends axially. Preferably, the fourth guide rail 136 is two parallelly arranged, and the first belt 135 is located between the two fourth guide rails 136. The first belt 135 also extends axially, and the active synchronous wheel 133 and the passive synchronous wheel are respectively rotatably connected at both ends of the axial direction, and the active synchronous wheel 133 and the passive synchronous wheel are respectively fixed to the first frame 11 through the second bearing seat 134. The fourth motor 131 is connected to the active synchronous wheel 133 through the coupling 132. Under the action of the fourth motor 131, the active synchronous wheel 133 rotates and pulls the first belt 135 and the passive synchronous wheel to rotate. Preferably, the fourth motor 131 is a servo motor, model number is MS1H4-75B30CB-T331R. Optionally, the fourth motor 131 can also be connected to a reducer, model number is LRF80-10-L2-70-90-M6.

[0035] The second heating mechanism 14 is slidably disposed on the fourth guide rail 136, and the second heating mechanism 14 is connected to the first belt 135 of the second moving mechanism 13. When the first belt 135 moves, the second heating mechanism 14 can move axially along the fourth guide rail 176. Preferably, the second heating mechanism 14 is a crank rocker translation mechanism, including a sliding bracket 141, a fifth motor (not shown), a seventh guide rail 142 and a connecting rod 143. The sliding bracket 141 is slidably disposed on the fourth guide rail 136 and is connected to the first belt 135. The seventh guide rail 142 is fixedly disposed on the sliding bracket 141, and the seventh guide rail 142 extends along the X-axis direction. The connecting rod 143 is disposed on the seventh guide rail 142 and can move along the seventh guide rail 142 to achieve reciprocating heating of the heating area. As shown in FIG. Figure 4 As shown, the connecting rod 143 is connected to a flame gun. The transmission shaft 123 of the first frame 11 is hollowed out, and the nozzle of the flame gun faces upward, and the flame can pass through the hollowed out part to heat the bottom end of the outer wall of the quartz tube. The second moving mechanism 13 drives the second heating mechanism 14 to move back and forth, thereby heating different heating locations on the outside of the quartz tube. In this embodiment, the second heating mechanism 14 is located at the bottom end of the quartz tube, so it heats the bottom end of the outer wall of the quartz tube. It can be understood that when the quartz tube is placed on the first frame and the heating location is not located at the bottom of the quartz tube, the heating location of the quartz tube can be rotated downward by the pipeline rotating mechanism 12, and then heated. In other embodiments, the second moving mechanism 13 and the second heating mechanism 14 can also be arranged above or on the front and rear sides of the quartz tube, so that other places on the outer wall of the quartz tube can be heated, as long as the heating location and the welding location are kept equivalent to the inside and outside of the quartz tube wall.

[0036] Please refer to Figure 1 and Figure 5 The internal heating welding device 20 is arranged opposite to the external heating device 10 (in the left and right directions in the figure). The internal heating welding device 20 includes a first moving mechanism 21 and a clamping mechanism 22 and a first heating mechanism 23 arranged on the first moving mechanism 21. The clamping mechanism 22 is used to clamp the weldment to be welded. The first heating mechanism 23 is used to heat the inner wall of the quartz tube and the weldment at the same time. Please refer to Figure 5 and Figure 6 The clamping mechanism 22 and the first heating mechanism 23 are both arranged on the first moving mechanism 21. The first moving mechanism 21 is used to move the clamping mechanism 22 and the first heating mechanism 23, and can extend the clamping mechanism 22 and the first heating mechanism 23 from one axial end of the quartz tube into the inner wall of the quartz tube. When the weldment moves to the welding position, the first heating mechanism 23 heats the weldment and the welding position of the inner wall of the quartz tube at the same time until both are melted, thereby realizing the welding of the weldment and the inner wall of the quartz tube.

[0037] The first moving mechanism 21 includes a second frame 211, a first moving assembly 212 arranged on the second frame 211, a second moving assembly 213 arranged on the first moving assembly 212, a third moving assembly 214 arranged on the second moving assembly 213, and a mechanical arm 215 arranged on the second moving assembly 213. The first moving assembly 212 is used to move the mechanical arm 215 in a first direction, and the second moving assembly 213 is used to move the mechanical arm 215 in a second direction. The third moving assembly 214 is used to move the mechanical arm 215 in a third direction. The first direction, the second direction and the third direction are perpendicular to each other. In this embodiment, the first direction, the second direction and the third direction are respectively the X-axis direction, the Z-axis direction and the Y-axis direction. The X-axis direction is also the axial direction. The first heating mechanism 23 and the clamping mechanism 22 are arranged on the mechanical arm 215. The robot arm 215 can move the first heating mechanism 23 and the clamping mechanism 22 from one axial end of the quartz tube into the quartz tube, and adjust the positions of the first heating mechanism 23 and the clamping mechanism 22 in the quartz tube, so as to move the weldment to the welding position.

[0038] Preferably, the length of the mechanical arm 215 and the second frame 211 corresponds to the axial length of the quartz tube. That is, the first moving mechanism 21 can move the mechanical arm 215 from one axial end of the quartz tube to the other axial end of the quartz tube, thereby ensuring that the welding area covers the entire inner wall of the quartz tube.

[0039] Specifically, the first moving assembly 212 is a synchronous belt translation assembly, which is used to adjust the movement of the weldment in the X direction in the quartz tube. Figure 6 As shown, the synchronous belt translation assembly includes a fifth guide rail 2121, a sixth motor 2122, a driving wheel 2123, a driven wheel 2124, a second belt 2125, a third bearing seat 2126 and a moving seat 2127. The fifth guide rail 2121 is arranged on the second frame 211, and it and the second frame 211 both extend axially. The third bearing seat 2126 is fixedly arranged at both axial ends of the fifth guide rail 2121. The driving wheel 2123 and the driven wheel 2124 are rotatably arranged on the third bearing seat 2126, and the two are rotatably connected by the second belt 2125. The moving seat 2127 is slidably connected to the fifth guide rail 2121. The moving seat 2127 is fixedly connected to the second belt 2125. The sixth motor 2122 is connected to the driving wheel 2123. The sixth motor 2122 is started to drive the driving wheel 2123 to rotate, and then the second belt 2125 pulls the driven wheel 2124 to rotate, so that the moving seat 2127 can move in translation along the X-axis direction. Preferably, the second belt 2125 is supported by two sets of belt support wheels 2128 to prevent the second belt 2125 from sagging.

[0040] like Figure 7As shown, the moving seat 2127 is in a cubic shape and includes a bracket a extending along the X axis, a bracket b extending along the Y axis, and a bracket c extending along the Z axis. The second moving assembly 213 is arranged in the moving seat 2127. The second moving assembly 213 includes a second guide rail 2131, a lift 2132, a second motor 2133 and a moving plate 2134. The second guide rail 2131 is arranged on the bracket c and extends along the Z axis. Preferably, the second guide rail 2131 is fixed on two opposite brackets c. The moving plate 2134 is slidably arranged on the second guide rail 2131 and can slide along the second guide rail 2131. The moving plate 2134 is connected to the robot arm 215. The lift 2132 is fixed on the bracket a and is connected to the robot arm 215 through the second motor 2133. The second motor 2133 rotates to drive the screw of the lift 2132 to rotate, thereby driving the moving plate 2134 to move in the Z axis direction (up and down direction in the figure). Preferably, the robotic arm 215 is connected to two axial ends of the moving plate 2134 respectively to enhance the stability of the robotic arm 215 .

[0041] The mobile plate 2134 is also provided with a third moving assembly 214 for moving the robot 215 in the Y-axis direction. The third moving assembly 214 includes a third guide rail 2141, a support end bearing seat 2142, a fixed end bearing seat 2143, a screw rod 2144 and a hand wheel 2145. The third guide rail 2141 extends along the Y-axis and is provided at the axial end of the mobile plate 2134. Preferably, the third guide rail 2141 is fixed at both axial ends of the mobile plate 2134. The robot 215 is slidably provided on the third guide rail 2141. A support end bearing seat 2142 is provided at the bottom end of the robot 215 for carrying the robot 215. The mobile plate 2134 is also provided with a fixed end bearing seat 2143, and the support end bearing seat 2142 is connected to the fixed end bearing seat 2143 through a screw rod 2144. A hand wheel 2145 is provided at the end of the screw rod 2144. By rotating the hand wheel 2145, the relative distance between the support end bearing seat 2142 and the fixed end bearing seat 2143 can be adjusted, that is, the movement of the robot arm 215 in the Y-axis direction (front and back direction in the figure) can be realized.

[0042] The working steps of the first moving mechanism 21 are as follows: adjust the first moving component 212 to move the moving seat 2127 along the fifth guide rail 2121, and move the mechanical arm 215 to the axial end of the quartz tube (the right end in this embodiment); adjust the second moving component 213 and the third moving component 214 to align the clamping mechanism 22 and the first heating mechanism 23 with the tube mouth of the quartz tube, and adjust the weldment to a position roughly horizontal with the welding point (the line connecting the weldment and the welding point is roughly in the horizontal plane, so that the weldment can be moved to the welding point only by moving the weldment in the X direction); continue to adjust the first moving component 212 to make the mechanical arm 215 enter the quartz tube until the weldment moves to the welding point; the first heating mechanism 23 heats the weldment and the welding point at the same time to melt and weld them.

[0043] Since the distance between the weldment and the inner wall of the quartz tube in the Z axis is too close when performing the step of "adjusting the second moving assembly 213 and the third moving assembly 214 so that the clamping mechanism 22 and the first heating mechanism 23 are aligned with the tube mouth of the quartz tube, and the weldment is roughly adjusted to a position horizontal to the welding position", the movement of the weldment and the clamping mechanism 22 and the first heating mechanism 23 when entering the inner wall of the quartz tube may be affected. Preferably, as Fig.11 As shown, the internal heating welding device 20 of this embodiment may also include a moving fine-adjusting mechanism 24 for adjusting the gap between the weldment and the inner wall of the quartz tube in the Z-axis direction. Therefore, the working steps of the first moving mechanism 21 can be adjusted as follows: adjusting the first moving component 212 to move the moving seat 2127 along the fifth guide rail 2121, and moving the mechanical arm 215 to the axial end of the quartz tube (the right end in this embodiment); adjusting the second moving component 213 and the third moving component 214 so that the clamping mechanism 22 and the first heating mechanism 23 are aligned with the tube mouth of the quartz tube; continuing to adjust the first moving component 212 to allow the mechanical arm 215 to enter the quartz tube, and adjusting the moving fine-adjusting mechanism 24 until the weldment moves to the welding position; the first heating mechanism 23 heats the weldment and the welding position at the same time to melt and weld the two. That is, it is only necessary to adjust the clamping mechanism 22 and the first heating mechanism 23 to align with the tube mouth of the quartz tube, and it is not necessary to adjust the weldment to a position where the line connecting the weldment and the welding position is parallel to the X-axis.

[0044] Specifically, the mobile fine-tuning mechanism 24 includes a first motor 241, a connecting plate 242, a first guide rail 243 and a sliding connecting plate 244. The first motor 241 is a lead screw motor or a screw motor. The first motor 241 and the first guide rail 243 are arranged on the mechanical arm 215. The first guide rail 243 extends along the Z-axis direction. The first motor rotates through the connecting plate 242 to pull the sliding connecting plate 244 to perform up and down translational movement on the first guide rail 243. Among them, the clamping mechanism 22 is connected to the sliding connecting plate 244. When the sliding connecting plate 244 moves up and down, the clamping mechanism 22 thereon and the weldment also move up and down, so that the Z-direction gap between the weldment and the inner wall of the quartz tube can be adjusted.

[0045] like Fig. 9As shown, the clamping mechanism 22 of this embodiment is a cylinder clamping mechanism, which is arranged on the robot arm 215. The cylinder clamping mechanism includes a slide cylinder 221, a sliding plate 222, a fixed clamp block 223 and a movable clamp block 224. The slide cylinder 221 is divided into a fixed part and a sliding part that are connected to each other. The fixed clamp block 223 is located at one axial end of the fixed part. The sliding part of the slide cylinder 221 is connected to the sliding plate 222 and the movable clamp block 224 in sequence. Among them, the fixed clamp block 223 and the movable clamp block 224 are spaced and opposite to each other, and the weldment is clamped between the two. When the slide cylinder 221 is working, its sliding part drives the movable clamp block 224 to move closer to the fixed clamp block 223 to clamp the weldment. When the welding work is completed, the sliding part drives the movable clamp block 224 to move away from the fixed clamp block 223, thereby loosening the weldment. In addition, a lower water cooling plate 227 is provided at the bottom end of the fixed part of the slide cylinder 221, and an upper water cooling plate 226 is provided at the upper end of the sliding part of the slide cylinder 221. A flame baffle 225 is also provided at the bottom end of the lower water cooling plate 227. The slide cylinder 221 is cooled by the upper and lower water cooling plates, and the flame is isolated from the slide cylinder 221 by the flame baffle 225, which can effectively reduce the temperature of the slide cylinder 221 and reduce the impact of high temperature on it. Among them, when the weldment is clamped, the lower end of the weldment is exposed from between the movable clamp block 224 and the fixed clamp block 223. Preferably, the movable clamp block 224 and the fixed clamp block 223 have a certain length in the radial direction, so that a row of weldments can be clamped between the two, and there can be multiple weldments in a row, that is, multiple weldments can be welded at one time. In an optional embodiment, multiple rows of weldments can be fixed on the robot arm 215 along the Y-axis direction, so that when a row of weldments is welded, the clamping mechanism 22 can be moved to a new weldment by moving the fine-tuning mechanism 24, and the new weldment can be clamped to continue welding, without moving the robot arm 215 out of the quartz tube to replace the new weldment, thereby further improving work efficiency.

[0046] like Figure 8 and Fig.10As shown, the first heating mechanism 23 is arranged on the robot arm 215, and it is arranged along the X-axis with the clamping mechanism 22. The first heating mechanism 23 is a crank rocker reciprocating translation mechanism, which includes a seventh motor 231, a cam 232, a clamping member 233, a connecting rod 234 and a sixth guide rail 235. The seventh motor 231 and the sixth guide rail 235 are fixedly arranged on the robot arm 215. The seventh motor 231 is connected to the connecting rod 234 through the cam 232. The connecting rod 234 is connected to the clamping member 233. The clamping member 233 is movably arranged on the sixth guide rail 235, and the connecting rod 234 is connected to a flame gun, so that the flame gun is aimed at the lower end of the weldment exposed from the internal clamping mechanism 22. The seventh motor 231 rotates to drive the cam 232 and the connecting rod 234 to move, and pulls the clamping member 233 and the connecting rod 234 to perform reciprocating translation along the sixth guide rail 235, thereby achieving heating of the weldment. Since the weldment of this embodiment is located above the inner wall of the quartz tube when it enters the quartz tube, preferably, the nozzle of the flame gun can be set obliquely downward to better align the weld between the weldment and the inner wall of the quartz tube. Corresponding to the number of weldments of the clamping mechanism 22, there are multiple connecting rods 234 in this embodiment, and the multiple connecting rods 234 are arranged in the Y-axis direction, corresponding to multiple weldments respectively. In addition, the connecting rod 234 of this embodiment is movably connected to the clamping member 233, and the connecting rod 234 can also move in the Z-axis direction relative to the clamping member 233, so that when the movable fine-tuning mechanism 24 is adjusted to move the weldment in the Z-axis direction, the connecting rod 234 together with the flame gun can also move in the Z-axis direction, so that the nozzle of the flame gun keeps corresponding to the weldment. It can be understood that when the mechanical arm 215 moves in the quartz tube, the clamping mechanism 22 and the first heating mechanism 23 thereon will not be interfered by the inner wall of the quartz tube and the welded weldment on the inner wall.

[0047] It should be noted that the welding device 100 of this embodiment is also provided with a control main board (not shown), which is electrically connected to the external heating device and the internal heating welding device, respectively. On the one hand, the first moving mechanism, the pipeline rotation mechanism and the second moving mechanism are respectively controlled by the program, so as to effectively control the heating position of the flame gun; on the other hand, the heating / welding time and temperature of the external heating device and the internal heating welding device are respectively controlled by the program, so as to realize controllable welding.

[0048] The quartz tube welding method of this embodiment includes the following steps: moving the weldment into the welding position of the inner wall of the quartz tube to be welded; moving the external heating device to the heating position of the outer wall of the quartz tube, wherein the welding position corresponds to the heating position; heating the welding position of the weldment and the inner wall of the quartz tube to melt and weld them, and heating the outer wall of the quartz tube at the same time. Move the weldment to the welding position of the inner wall of the quartz tube to be welded;

[0049] The quartz tube welding device of this embodiment can weld multiple quartz parts at different parts of the inner wall of a large-diameter quartz tube, enhance the photovoltaic effect, and be better applied to photovoltaic power generation, solar water heaters, semiconductors, electromagnetism and other fields. Compared with the prior art welding of the same quartz tube and weldment, the welding device and method of the present invention only requires one person to operate the equipment, and the welding can be completed in about 40 minutes, which can greatly improve the welding capacity and welding quality of the quartz tube.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A quartz tube welding device, characterized in that: It includes an external heating device and an internal heating welding device, wherein the external heating device is arranged outside the quartz tube and is used to heat the outer wall of the quartz tube; The internal heating welding device comprises a first moving mechanism, a clamping mechanism and a first heating mechanism arranged with the clamping mechanism in a first direction, the first moving mechanism is arranged on the outer side of the quartz tube, the first heating mechanism and the clamping mechanism are respectively arranged on the first moving mechanism, the first moving mechanism is used to extend the first heating mechanism and the clamping mechanism from one axial end of the quartz tube into the quartz tube, the clamping mechanism is used to clamp the weldment to be welded, the first heating mechanism is a crank rocker reciprocating translation mechanism, comprising a seventh motor, a cam, a clamping member, a connecting rod and a sixth guide rail, the connecting rod is connected with a flame gun, so that the flame gun is aimed at the lower end of the weldment exposed from the internal clamping mechanism; The cam and the connecting rod are driven to move by the rotation of the seventh motor, and the clamping member and the connecting rod are pulled to move back and forth along the sixth guide rail, so as to evenly heat the inner wall of the quartz tube and the weldment to melt and weld them; The internal heating welding equipment also includes a movable fine-adjustment mechanism, which includes a first motor, a sliding connecting plate and a first guide rail, wherein the first guide rail extends along the second direction, and the sliding connecting plate is connected to the clamping mechanism. The sliding connecting plate is driven by the first motor to move on the first guide rail to adjust the distance between the weldment and the inner wall of the quartz tube in the second direction; the connecting rod is movably connected to the clamping member, and the connecting rod can move in the second direction relative to the clamping member. When the movable fine-adjustment mechanism is adjusted to move the weldment in the second direction, the connecting rod together with the flame gun can also move in the second direction so that the nozzle of the flame gun remains corresponding to the weldment.

2. The quartz tube welding device according to claim 1, characterized in that: The internal heating welding device is located at one axial end of the quartz tube.

3. The quartz tube welding device according to claim 1, characterized in that: The clamping mechanism includes a slide cylinder and a fixed clamp block and a movable clamp block respectively connected to the slide cylinder, and the weldment is clamped between the movable clamp block and the fixed clamp block, wherein the slide cylinder is also connected to an upper water cooling plate and a lower water cooling plate, and a flame baffle is provided at the bottom end of the lower water cooling plate.

4. The quartz tube welding device according to claim 1, characterized in that: The first moving mechanism includes a first moving component, a second moving component arranged on the first moving component, a third moving component arranged on the second moving component, and a robotic arm arranged on the second moving component, the first moving component is used to move the robotic arm in a first direction, the second moving component is used to move the robotic arm in a second direction, and the third moving component is used to move the robotic arm in a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

5. The quartz tube welding device according to claim 1, characterized in that: The first guide rail is fixed on the first moving mechanism, the first motor is connected to the sliding connection plate, and the sliding connection plate is slidably connected to the first guide rail.

6. The quartz tube welding device according to claim 4, characterized in that: The second moving component includes a second guide rail, a lift, a second motor and a moving plate. The second guide rail and the lift are arranged on the first moving component. The second guide rail extends along a second direction. The moving plate is slidably arranged on the second guide rail and can slide along the second guide rail. The moving plate is connected to the robotic arm. The lift is driven by the second motor to drive the moving plate to move along the second direction.

7. The quartz tube welding device according to claim 6, characterized in that: The third moving assembly includes a third guide rail, a supporting end bearing seat, a fixed end bearing seat, a screw rod and a handwheel. The third guide rail and the fixed end bearing seat are arranged on the moving plate, and the third guide rail extends along the third direction. The robotic arm is slidably arranged on the third guide rail. The supporting end bearing seat is provided at the bottom end of the robotic arm. The supporting end bearing seat and the fixed end bearing seat are connected with the screw rod. A handwheel is provided at the end of the screw rod. By rotating the handwheel, the relative distance between the supporting end bearing seat together with the robotic arm thereon and the fixed end bearing seat can be adjusted to drive the robotic arm to move in the third direction.

8. The quartz tube welding device according to claim 1, characterized in that: The external heating device includes a pipe rotating mechanism, a second moving mechanism and a second heating mechanism. The pipe rotating mechanism is used to rotate the quartz tube around the central axis. The second heating mechanism is arranged on the second moving mechanism. The second moving mechanism can drive the second heating mechanism to move along the axial direction of the quartz tube.

9. The quartz tube welding device according to claim 8, characterized in that: The pipeline rotating mechanism includes a plurality of transmission shafts extending in the axial direction, and a plurality of rollers are fixedly provided on each transmission shaft. The rollers abut against the bottom end of the outer wall of the quartz tube, and the quartz tube is rotated around the central axis by rotating the transmission shaft.

10. A quartz tube welding method, using the quartz tube welding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Move the weldment to the welding position of the inner wall of the quartz tube to be welded; The heating position of the outer wall of the quartz tube is heated, and the welding position and the welding piece are heated at the same time, so that the welding position and the welding piece are melted and welded, wherein the welding position and the heating position correspond to the inside and outside of the quartz tube wall.

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