CN117923771A

CN117923771A - Quartz tube welding device and welding method

Info

Publication number: CN117923771A
Application number: CN202311727633.8A
Authority: CN
Inventors: 林风杰; 叶瑞龙; 姚锋
Original assignee: Shenzhen Yuanshuo Automation Technology Co ltd
Current assignee: Shenzhen Yuanshuo Automation Technology Co ltd
Priority date: 2023-12-14
Filing date: 2023-12-14
Publication date: 2024-04-26

Abstract

The quartz tube welding device comprises an external heating device and an internal heating welding device, wherein the external heating device is arranged on the outer side of a quartz tube and is used for heating the outer wall of the quartz tube; the internal heating welding equipment comprises a first moving mechanism, a clamping mechanism and a first heating mechanism, wherein 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 for enabling the first heating mechanism and the clamping mechanism to extend into the quartz tube from one axial end of the quartz tube, the clamping mechanism is used for clamping a weldment to be welded, and the first heating mechanism is used for simultaneously heating the inner wall of the quartz tube and the weldment so as to enable the inner wall of the quartz tube and the weldment to be welded in a melting mode.

Description

Quartz tube welding device and welding method

Technical Field

The invention relates to the field of automatic equipment, in particular to a quartz tube welding device and a welding method.

Background

The quartz tube has a series of excellent physical and chemical properties, such as high temperature resistance, corrosion resistance, good light transmission performance and electrical insulation, and is a preferred tube in the quartz material deep processing industry. The size of the existing large-caliber photovoltaic quartz tube can be more than 2m, and the large-caliber photovoltaic quartz tube can be widely applied to the fields of photovoltaic power generation, solar water heaters, semiconductors, electromagnetism and the like. The inner wall of the quartz tube is usually welded with a plurality of components, such as quartz pieces, to meet different application requirements. When such a large-sized quartz tube is welded, there are the following problems: 1. the large-size quartz tube is difficult to position and cannot be clamped by a conventional clamp; 2. the quartz big tube is easy to burst due to unbalanced internal and external heating, and the yield is low; 3. the station of a quartz blank pipe welding weldment needs 5-6 advanced welding workers to weld simultaneously, the requirements on the welding technology of the welding workers and the coordination degree of welding engineers are extremely high in multi-position welding, the whole welding process takes 2-3 hours, and the productivity and the welding quality of the welding weldment are far from the development of the current hot photovoltaic and semiconductor industry.

Disclosure of Invention

The invention aims to provide a quartz tube welding device and a quartz tube welding method, which are used for improving the problems or at least solving the technical problems to a certain extent.

In order to solve the technical problems, in one aspect, the invention provides a quartz tube welding device, which comprises an external heating device and an internal heating welding device, wherein the external heating device is arranged on the outer side of a quartz tube and is used for heating the outer wall of the quartz tube; the internal heating welding equipment comprises a first moving mechanism, a clamping mechanism and a first heating mechanism, wherein 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 for enabling the first heating mechanism and the clamping mechanism to extend into the quartz tube from one axial end of the quartz tube, the clamping mechanism is used for clamping a weldment to be welded, and the first heating mechanism is used for heating the inner wall of the quartz tube and the weldment to enable the inner wall of the quartz tube and the weldment to be welded in a melting mode.

In some embodiments, the internal heat welding apparatus is located at an axial end of the quartz tube.

In some embodiments, the clamping mechanism comprises a sliding table cylinder, a fixed clamping block and a movable clamping block which are respectively connected with the sliding table cylinder, the welding piece is clamped between the movable clamping block and the fixed clamping block, wherein the sliding table cylinder is also connected with an upper water cooling plate and a lower water cooling plate, and a flame baffle is arranged at the bottom end of the lower water cooling plate.

In some embodiments, the first moving mechanism comprises 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 mechanical arm arranged on the second moving component, wherein the first moving component is used for moving the mechanical arm in a first direction, the second moving component is used for moving the mechanical arm in a second direction, and the third moving component is used for moving the mechanical arm in a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

In some embodiments, the internal heat welding apparatus further includes a moving fine adjustment mechanism including a first motor, a sliding connection plate, and a first guide rail, the first guide rail is fixed on the first moving mechanism, the first guide rail extends along the second direction, the first motor is connected with the sliding connection plate, the sliding connection plate is connected with the first guide rail in a sliding manner, the sliding connection plate is further connected with the clamping mechanism, and the sliding connection plate is driven by the first motor to move on the first guide rail to adjust a distance between the weldment and an inner wall of the quartz tube in the second direction.

In some embodiments, the second moving assembly includes a second guide rail, a lifter, a second motor, and a moving plate, where the second guide rail and the lifter are disposed on the first moving assembly, the second guide rail extends along a second direction, the moving plate is slidably disposed on the second guide rail and is slidable along the second guide rail, and the moving plate is connected to the mechanical arm, and the lifter is driven by the second motor to drive the moving plate to move along the second direction.

In some embodiments, the third moving assembly includes a third guide rail, a support end bearing seat, a fixed end bearing seat, a screw rod and a hand wheel, wherein the third guide rail and the fixed end bearing seat are arranged on the moving plate, the third guide rail extends along the third direction, the mechanical arm is slidably arranged on the third guide rail, the bottom end of the mechanical arm is provided with the support end bearing seat, the support end bearing seat is connected with the fixed end bearing seat through the screw rod, the end part of the screw rod is provided with the hand wheel, and the relative distance between the support end bearing seat and the mechanical arm on the support end bearing seat and the fixed end bearing seat is adjustable through rotating the hand wheel so as to drive the mechanical arm to move in the third direction.

In some embodiments, the external heating device comprises a pipe rotating mechanism, a second moving mechanism and a second heating mechanism, wherein the pipe rotating mechanism is used for enabling the quartz pipe to rotate around the central shaft, the second heating mechanism is arranged on the second moving mechanism, and the second moving mechanism can drive the second heating mechanism to move along the axial direction of the quartz pipe.

In some embodiments, the pipe rotating mechanism comprises a plurality of transmission shafts extending along the axial direction, each transmission shaft is fixedly provided with a plurality of rollers in a penetrating mode, the rollers are abutted to the bottom end of the outer wall of the quartz pipe, and the quartz pipe is enabled to rotate around the central shaft through rotating the transmission shafts.

Another aspect of the present invention provides a method for welding a quartz tube, comprising the steps of: moving the weldment to a welding position of the inner wall of the quartz tube to be welded; and heating the heating part of the outer wall of the quartz tube, and simultaneously heating the welding part and the weldment to enable the welding part and the weldment to be fused and welded, wherein the welding part corresponds to the heating part with respect to the inside and the outside of the quartz tube wall.

The quartz tube welding device provided by the embodiment of the invention adopts the synergistic effect of the internal heating welding equipment and the external heating equipment, wherein the internal heating welding equipment stretches a weldment from one axial end of the quartz tube into a part to be welded in the quartz tube. The internal heating welding equipment and the external heating equipment heat the inner wall and the outer wall of the quartz tube simultaneously, and respectively and accurately control the heating position and the moving track of the flame gun, so that the heating temperature and the heating time of welding are effectively controlled. The welding precision and the yield can be better improved, the welding process device which meets the production energy requirement of a high-speed modern production line is adapted, and meanwhile, the manpower welding cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a quartz tube welding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of the external heating apparatus of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2 at A;

FIG. 4 is a schematic diagram of the second heating mechanism of FIG. 2;

FIG. 5 is a schematic view of the internal heat welding apparatus of FIG. 1;

FIG. 6 is a schematic view of a portion of the first moving mechanism of FIG. 5;

FIG. 7 is a schematic view of a portion of the first moving mechanism of FIG. 5;

FIG. 8 is a schematic diagram of the clamping mechanism, the first heating mechanism and the movable fine adjustment mechanism of FIG. 5;

FIG. 9 is a schematic view of the clamping mechanism of FIG. 5;

FIG. 10 is a schematic view of the first heating mechanism of FIG. 5;

Fig. 11 is a schematic structural view of the movable fine adjustment mechanism of fig. 5.

100. A quartz tube welding device; 10. an external heating device; 11. a first frame; 111. a first layer; 112. a second layer; 12. a pipe rotation mechanism; 121. a third motor; 122. a sprocket; 123. a transmission shaft; 124. a roller; 125. a first bearing seat; 13. a second moving mechanism; 131. a fourth motor; 132. a coupling; 133. a driving synchronizing wheel; 134. a passive synchronizing wheel; 135; a first belt; 136. a second bearing seat; 137. a fourth guide rail; 14. a second heating mechanism; 141. a sliding support; 142. a seventh guide rail; 142. a connecting rod; 20. an internal heating welding device; 21. a first moving mechanism; 211. a second frame; 212. a first moving assembly; 2121. a fifth guide rail; 2122. a sixth motor; 2123. a driving wheel; 2124. driven wheel; 2125. a second belt; 2126. a third bearing seat; 2127. a movable seat; 213. a second moving assembly; 2131. a second guide rail; 2132. a hoist; 2133. a second motor; 2134. a moving plate; 214. a third moving assembly; 2141. a third guide rail; 2142. a bearing seat at the supporting end; 2143. a fixed end bearing seat; 2144. a screw rod; 2145. a hand wheel; 215. a mechanical arm; 22. a clamping mechanism; 221. a slipway cylinder; 222. a sliding plate; 223. fixing the clamping blocks; 224. a movable clamping block; 225. a flame baffle; 226. a water cooling plate is arranged; 227. a lower water cooling plate; 23. a first heating mechanism; 231. a seventh motor; 232. a cam; 233. a clamping member; 234. a connecting rod; 235. a sixth guide rail; 24. a movable fine adjustment mechanism; 241. a first motor; 242. a connecting plate; 243 a first rail; 244. and (5) sliding the connecting plate.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

It should be noted that, in this embodiment, terms of upper, lower, inner, outer, etc. are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.

The present invention adopts the following technical scheme, namely a quartz tube welding device 100. As shown in fig. 1, the welding apparatus 100 includes an external heating device 10 and an internal heating welding device 20. The external heating device 10 is used for heating the heating place of the outer wall of the quartz tube. The internal heating welding apparatus 20 is used to heat the welding part and the welding part of the inner wall of the quartz tube to weld the welding part to the inner wall of the quartz tube. Wherein the welding part corresponds to the heating part with respect to the inner side and the outer side 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 wall and the outer wall of the quartz tube are heated uniformly, and the breakage or deformation of the pipeline caused by uneven heating inside and outside the quartz tube is avoided. Typically, the weldment is a quartz member or other high temperature meltable device.

Specifically, as shown in fig. 2, the external heating apparatus 10 includes a first housing 11, and a pipe rotation mechanism 12, a second movement mechanism 13, and a second heating mechanism 14 provided to the first housing 11. Wherein the pipe rotating mechanism 12 is used for supporting and rotating the quartz pipe. The second heating mechanism 14 is used for heating the outer wall of the quartz tube. The second moving mechanism 13 is connected with the second heating mechanism 14 for moving 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. Wherein, the axial direction and the radial direction are the axial direction and the radial direction of the quartz tube.

The first frame 11 is elongated and is divided into a first layer 111 and a second layer 112. The first layer 111 is provided with a pipe turning mechanism 12. The quartz tube is located on the pipe rotating mechanism 12, and the extending direction of the quartz tube is the same as that of the first frame 11. The pipe rotating mechanism 12 includes a third motor 121, a sprocket 122, a drive shaft 123, rollers 124, and a first bearing housing 125. The drive shaft 123 extends in the axial direction and is at least two. At least two drive shafts 123 are fixed to the first frame 11 in parallel (in the front-rear direction in the drawing) through first bearing blocks 125. Each transmission shaft 123 is provided with a plurality of rollers 124 in a penetrating way, and the rollers 124 are abutted with the outer wall of the quartz tube, so that the quartz tube is carried. The third motor 121 is connected to a drive shaft 123 via a sprocket 122. When the third motor 121 is started, the driving sprocket 122 drives the transmission shaft 123 and the rollers 124 on the transmission shaft to rotate in the same direction, so that the rollers 124 drive the quartz tube to rotate by friction force. Preferably, the plurality of driving shafts 123 are symmetrically disposed about the central axis of the quartz tube such that the quartz tube rotates about the central axis thereof. The rollers 124 on each drive shaft 123 are uniformly distributed in the axial direction. Preferably, sprocket 122 is a double row sprocket. The third motor 121 and the speed reducer drive the rollers 124 arranged on both sides of the bottom of the quartz tube to rotate simultaneously through two groups of chains, so as to ensure that the quartz tube can rotate around the central shaft smoothly. The third motor 121 of this embodiment is of the type Racing 110HS12Z. Optionally, the first motor is also connected with a speed reducer, and the model of the speed reducer is LRF120-L1-19-55.5-125.87-M8.

Referring to fig. 2 and 3 again, the second moving mechanism 13 is disposed on the second layer 112 of the first frame 11. The second moving mechanism 13 is a belt translation mechanism, and includes a fourth motor 131, a coupling 132, an active synchronizing wheel 133, a passive synchronizing wheel (not shown), a second bearing housing 134, a first belt 135, and a fourth guide rail 136. The fourth rail 136 extends in the axial direction. Preferably, the fourth guide rails 136 are two parallel, and the first belt 135 is located between the two fourth guide rails 136. The first belt 135 also extends along the axial direction, two axial ends of the first belt are respectively connected with an active synchronizing wheel 133 and a passive synchronizing wheel in a rotating way, and the active synchronizing wheel 133 and the passive synchronizing wheel are respectively fixed on the first frame 11 through a second bearing seat 134. The fourth motor 131 is connected to the driving synchronizing wheel 133 via a coupling 132. Under the action of the fourth motor 131, the driving synchronizing wheel 133 rotates and pulls the first belt 135 and the driven synchronizing wheel to rotate. Preferably, the fourth motor 131 is a servo motor, model MS1H4-75B30CB-T331R. Optionally, the fourth motor 131 may also be connected to a speed reducer, model LRF80-10-L2-70-90-M6.

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. As the first belt 135 moves, the second heating mechanism 14 may move axially along the fourth guide rail 176. Preferably, the second heating mechanism 14 is a crank and rocker translation mechanism, including a sliding bracket 141, a fifth motor (not shown), a seventh rail 142, and a connecting rod 143. The sliding bracket 141 is slidably disposed on the fourth rail 136 and connected to the first belt 135. The seventh rail 142 is fixedly disposed on the sliding bracket 141, and the seventh rail 142 extends along the X-axis direction. The link 143 is disposed on the seventh rail 142 and is movable along the seventh rail 142 to reciprocally heat the heating portion. As shown in fig. 4, a flame gun is connected to the link 143. The transmission shaft 123 of the first frame 11 is hollowed out, the nozzle of the flame gun faces upwards, and the flame can penetrate 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 reciprocate, so that different heating positions on the outer side of the quartz tube are heated. In this embodiment, the second heating mechanism 14 is located at the bottom end of the quartz tube, so that it heats the bottom end of the outer wall of the quartz tube. It will be appreciated that when the quartz tube is placed on the first frame and the heating point is not located at the bottom of the quartz tube, the heating point of the quartz tube may be rotated downward by the tube rotation mechanism 12 and then heated. In other embodiments, the second moving mechanism 13 and the second heating mechanism 14 may be disposed above or on the front and rear sides of the quartz tube, so that other portions of the outer wall of the quartz tube may be heated, as long as the heated portions are kept corresponding to the inside and outside of the wall of the quartz tube.

Referring to fig. 1 and 5, the internal heat welding apparatus 20 is disposed opposite to the external heating apparatus 10 (left-right direction in the drawing). The internal heat welding apparatus 20 includes a first moving mechanism 21, a clamping mechanism 22 provided on the first moving mechanism 21, and a first heating mechanism 23. The clamping mechanism 22 is used for clamping weldments 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. Referring to fig. 5 and 6 in combination, the clamping mechanism 22 and the first heating mechanism 23 are both disposed on the first moving mechanism 21. The first moving mechanism 21 is used for moving 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 welding position of the weldment and the inner wall of the quartz tube at the same time until the weldment and the inner wall of the quartz tube are melted, so that the welding of the weldment and the inner wall of the quartz tube can be realized.

The first moving mechanism 21 includes a second frame 211, a first moving assembly 212 disposed on the second frame 211, a second moving assembly 213 disposed on the first moving assembly 212, a third moving assembly 214 disposed on the second moving assembly 213, and a mechanical arm 215 disposed on the second moving assembly 213. The first moving assembly 212 is used to move the robot 215 in a first direction, and the second moving assembly 213 is used to move the robot 215 in a second direction. The third movement assembly 214 is used to move the robotic arm 215 in a third direction. Wherein 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 an X-axis direction, a Z-axis direction, and a Y-axis direction, respectively. Wherein the X-axis direction is also the axial direction. The first heating mechanism 23 and the clamping mechanism 22 are disposed on the mechanical arm 215. The mechanical arm 215 can move the first heating mechanism 23 and the clamping mechanism 22 into the quartz tube from one axial end of the quartz tube, and adjust the positions of the first heating mechanism 23 and the clamping mechanism 22 in the quartz tube, so that the weldment moves to the welding position.

Preferably, the length of the robot arm 215 and the second frame 211 corresponds to the axial length of the quartz tube. That is, the first moving mechanism 21 may move the robot arm 215 from one axial end of the quartz tube to the other axial end of the quartz tube. So that it is ensured that the welded area covers the entire inner wall of the quartz tube.

Specifically, the first moving assembly 212 is a timing belt translation assembly for adjusting the X-direction movement of the weldment within the quartz tube. As shown in fig. 6, the timing belt translation assembly includes a fifth guide 2121, a sixth motor 2122, a driving pulley 2123, a driven pulley 2124, a second belt 2125, a third bearing block 2126, and a traveling block 2127. The fifth rail 2121 is disposed on the second frame 211 and extends along an axial direction with the second frame 211. Third bearing seats 2126 are fixedly provided at both axial ends of the fifth rail 2121. The driving wheel 2123 and the driven wheel 2124 are respectively rotatably disposed on the third bearing 2126, and are rotatably connected via a second belt 2125. The movable seat 2127 is slidably coupled to the fifth rail 2121. The movable seat 2127 is fixedly coupled to the second belt 2125. The sixth motor 2122 is connected to the driving wheel 2123, and the sixth motor 2122 is started to drive the driving wheel 133 to rotate, so that the second belt 2125 pulls the driven wheel 2124 to rotate, and the movable seat 2127 is enabled to perform translational motion along the X-axis direction. Preferably, the second belt 2125 is supported by two sets of belt supporting wheels 2128, preventing sagging of the second belt 2125.

As shown in fig. 7, the moving seat 2127 has a cubic shape including 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, respectively. The second motion assembly 213 is disposed within a motion seat 2127. The second moving assembly 213 includes a second guide rail 2131, a hoist 2132, a second motor 2133, and a moving plate 2134. The second guide rail 2131 is provided on the bracket c and extends along the Z axis. Preferably, the second guide rail 2131 is fixed to two opposing brackets c. The moving plate 2134 is slidably disposed on the second guide rail 2131 and is slidable along the second guide rail 2131. The moving plate 2134 is connected to the robot arm 215. The hoist 2132 is fixed to the bracket a and is connected to the robot arm 215 via a second motor 2133. The second motor 2133 rotates to drive the screw of the elevator 2132 to rotate, thereby driving the moving plate 2134 to move in the Z-axis direction (up and down in the drawing). Preferably, the robot arms 215 are connected to the moving plates 2134 at both axial ends thereof, respectively, to enhance the stability of the robot arms 215.

The moving plate 2134 further includes 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 block 2142, a fixed end bearing block 2143, a screw rod 2144, and a hand wheel 2145. The third guide 2141 extends along the Y-axis and is provided at an axial end of the moving plate 2134. Preferably, the third guide 2141 is fixed to both axial ends of the moving plate 2134. The robot 215 is slidably disposed on the third rail 2141. The bottom end of the mechanical arm 215 is provided with a supporting end bearing seat 2142 for bearing the mechanical arm 215. The moving plate 2134 is further provided with a fixed end bearing block 2143, and the supporting end bearing block 2142 is connected to the fixed end bearing block 2143 through a screw rod 2144. A hand wheel 2145 is provided at the end of the screw 2144. By rotating the handwheel 2145, the relative distance between the support end bearing mount 2142 and the fixed end bearing mount 2143 may be adjusted, i.e., movement of the robotic arm 215 in the Y-axis direction (front-to-back direction in the drawing) may be achieved.

The first moving mechanism 21 operates as follows: adjusting the first moving assembly 212 to move the moving seat 2127 along the fifth guide 2121 and move the robot arm 215 to the axial end (right end in the present embodiment) of the quartz tube; adjusting the second moving assembly 213 and the third moving assembly 214 to align the clamping mechanism 22 and the first heating mechanism 23 with the pipe orifice of the quartz pipe, and adjusting the weldment to a position substantially horizontal to the welding place (the connecting line of the weldment and the welding place is substantially positioned on the horizontal plane, so that the weldment can be moved to the welding place only by moving the weldment in the X direction); continuing to adjust the first moving assembly 212 to enable the mechanical arm 215 to enter the quartz tube until the weldment moves to a welding position; the first heating mechanism 23 heats the weld and the weld at the same time to melt-weld the two.

Since the distance between the weldment and the inner wall of the quartz tube in the Z-axis is too close, the movement of the weldment and the clamping mechanism 22 and the first heating mechanism 23 into the inner wall of the quartz tube may be affected when 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 mouth of the quartz tube and the weldment is adjusted approximately to a position horizontal to the welding place" is performed. Preferably, as shown in fig. 11, the internal heat welding apparatus 20 of the present embodiment may further include a moving fine adjustment mechanism 24 for adjusting a gap between the weldment and the inner wall of the quartz tube in the Z-axis direction. The working steps of the first moving mechanism 21 can be adjusted as follows: adjusting the first moving assembly 212 to move the moving seat 2127 along the fifth guide 2121 and move the robot arm 215 to the axial end (right end in the present embodiment) of the quartz tube; adjusting the second and third moving assemblies 213 and 214 so that the clamping mechanism 22 and the first heating mechanism 23 are aligned with the nozzle of the quartz tube; continuing to adjust the first moving assembly 212 to enable the mechanical arm 215 to enter the quartz tube, and adjusting the moving fine adjustment mechanism 24 until the weldment moves to a welding position; the first heating mechanism 23 heats the weld and the weld at the same time to melt-weld the two. I.e. only the clamping mechanism 22 and the first heating mechanism 23 need be adjusted to align the mouth of the quartz tube, and the weldment need not be adjusted to a position where the line connecting the weldment is parallel to the X-axis.

Specifically, the movement fine adjustment mechanism 24 includes a first motor 241, a connection plate 242, a first guide rail 243, and a slide connection plate 244. The first motor 241 is a screw motor or a screw motor. The first motor 241 and the first guide rail 244 are disposed on the robot arm 215. The first rail 244 extends in the Z-axis direction. The first motor rotates to pull the sliding connection plate 245 through the connection plate 242 to perform up-and-down translational movement on the first guide rail 244. Wherein the clamping mechanism 22 is connected to the sliding connection plate 244. As the sliding connection plate 244 moves up and down, the clamping mechanism 22 thereon, along with the weldment, also moves up and down, thereby adjusting the Z-gap between the weldment and the inner wall of the quartz tube.

As shown in fig. 9, the clamping mechanism 22 in the present embodiment is a cylinder clamping mechanism, which is disposed on the mechanical arm 215. The cylinder clamping mechanism comprises a sliding table cylinder 221, a sliding plate 222, a fixed clamping block 223 and a movable clamping block 224. The slide cylinder 221 is divided into a fixed portion and a sliding portion connected to each other. The fixing clip 223 is located at one axial end of the fixing portion. The sliding part of the slide table cylinder 221 is sequentially connected with a sliding plate 222 and a movable clamp block 224. Wherein, the fixed clamping block 223 is spaced from and opposite to the movable clamping block 224, and the weldment is clamped between the two. When the sliding table cylinder 221 works, the sliding part drives the movable clamping block 224 to approach to the fixed clamping block 223 so as to clamp the weldment. When the welding work is completed, the sliding portion drives the movable clamp block 224 away from the fixed clamp block 223, thereby releasing the weldment. In addition, a lower water cooling plate 227 is provided at the bottom end of the fixed portion of the slide table cylinder 221, and an upper water cooling plate 226 is provided at the upper end of the sliding portion of the slide table cylinder 221. The lower water cooling plate 227 is also provided at its bottom end with a flame baffle 225. The temperature of the sliding table cylinder 221 can be effectively reduced by cooling the sliding table cylinder 221 through the upper water cooling plate and the lower water cooling plate and isolating flame from the sliding table cylinder 221 through the flame baffle 225, so that the influence of high temperature on the sliding table cylinder 221 is reduced. Wherein, when the weldment is clamped, the lower end of the weldment is exposed from between the movable clamping block 224 and the fixed clamping block 223. Preferably, the movable clamping block 224 and the fixed clamping block 223 have a certain length in the radial direction, so that a row of weldments can be clamped between the movable clamping block and the fixed clamping block, and one row of weldments can be multiple, namely, a plurality of weldments can be welded at a time. In an alternative embodiment, multiple rows of weldments may be further fixed on the mechanical arm 215 along the Y-axis direction, so that after a row of weldments is welded, the clamping mechanism 22 may be moved to a new weldment by moving the fine adjustment mechanism 24, and the new weldment is clamped for further welding, without removing the mechanical arm 213 from the quartz tube to replace the new weldment, thereby further improving the working efficiency.

As shown in fig. 8 and 10, the first heating mechanism 23 is provided on the robot arm 215, which is aligned along the X-axis with the clamping mechanism 22. The first heating mechanism 23 is a crank and rocker reciprocating translation mechanism, which includes a seventh motor 231, a cam 232, a clamp 233, a connecting rod 234, and a sixth rail 235. The seventh motor 231 and the sixth rail 235 are fixedly disposed on the robot arm 215. The seventh motor 231 is connected to the connecting rod 234 through a cam 232. The connecting rod 234 is connected to the holding member 233. The holding member 233 is movably disposed on the sixth guide rail 235, and the connecting rod 234 is connected with a flame gun, so that the flame gun is aligned with the lower end of the weldment exposed from the inner holding mechanism 22. The seventh motor 231 rotates to drive the cam 232 and the connecting rod 234 to move, and pulls the clamping piece 233 and the connecting rod 234 to do reciprocating translational motion along the sixth guide rail 235, so that the heating of the welding piece is realized. Because 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 disposed obliquely downward to better align the weld of the weldment and the inner wall of the quartz tube. The number of the welding members of the clamping mechanism 22 corresponds to the number of the welding members, and the plurality of the connecting rods 234 in the present embodiment are plural, and the plurality of connecting rods 234 are arranged in the Y-axis direction to correspond to the plurality of welding members, respectively. In addition, the connecting rod 234 of the present 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 fine adjustment mechanism 24 is adjusted to move the weldment in the Z-axis direction, the connecting rod 234 and the flame gun can also move in the Z-axis direction, so that the nozzle of the flame gun corresponds to the weldment. It will be appreciated that the clamping mechanism 22 and the first heating mechanism 23 thereon are not interfered by the inner wall of the quartz tube and the welded weldment on the inner wall as the robotic arm 215 moves within the quartz tube.

It should be noted that, the welding apparatus 100 of the present embodiment is further provided with a control main board (not shown), which is electrically connected to the external heating device and the internal heating welding device, respectively, so as to control the first moving mechanism, the pipe rotating mechanism and the second moving mechanism through a program, respectively, thereby effectively controlling 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 a program, so that controllable welding is realized.

The quartz tube welding method of the embodiment comprises the following steps: moving the weldment into a welding position of the inner wall of the quartz tube to be welded; moving external heating equipment to a heating position of the outer wall of the quartz tube, wherein the welding position corresponds to the heating position; and the welding part of the heating welding piece and the inner wall of the quartz tube is used for melting and welding the heating welding piece and the inner wall of the quartz tube, and simultaneously heating the outer wall of the quartz tube. Moving the weldment to a welding position of the inner wall of the quartz tube to be welded;

The quartz tube welding device can weld a plurality of quartz pieces at different positions of the inner wall of the large-caliber quartz tube, and enhance the photovoltaic effect, so that the quartz tube welding device can be better applied to the fields of photovoltaic power generation, solar water heaters, semiconductors, electromagnetism and the like. Compared with the same quartz tube and weldment welded in the prior art, the welding device and method provided by the invention can finish welding in about 40 minutes by only one person operating equipment, and can greatly improve the welding productivity and welding quality of the quartz tube.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The quartz tube welding device is characterized by comprising external heating equipment and internal heating welding equipment, wherein the external heating equipment is arranged on the outer side of a quartz tube and is used for heating the outer wall of the quartz tube;

The internal heating welding equipment comprises a first moving mechanism, a clamping mechanism and a first heating mechanism, wherein 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 for enabling the first heating mechanism and the clamping mechanism to extend into the quartz tube from one axial end of the quartz tube, the clamping mechanism is used for clamping a weldment to be welded, and the first heating mechanism is used for heating the inner wall of the quartz tube and the weldment to enable the inner wall of the quartz tube and the weldment to be welded in a melting mode.

2. The quartz tube welding apparatus of claim 1, wherein the internal heat welding device is located at one axial end of the quartz tube.

3. The quartz tube welding device of claim 1, wherein the clamping mechanism comprises a slipway cylinder, a fixed clamping block and a movable clamping block which are respectively connected with the slipway cylinder, the weldment is clamped between the movable clamping block and the fixed clamping block, wherein the slipway cylinder is also connected with an upper water cooling plate and a lower water cooling plate, and a flame baffle is arranged at the bottom end of the lower water cooling plate.

4. The quartz tube welding apparatus of claim 1, wherein the first movement mechanism comprises a first movement assembly, a second movement assembly disposed on the first movement assembly, a third movement assembly disposed on the second movement assembly, and a robotic arm disposed on the second movement assembly, the first movement assembly configured to move the robotic arm in a first direction, the second movement assembly configured to move the robotic arm in a second direction, and the third movement assembly configured 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 apparatus of claim 1, wherein the internal heating welding apparatus further comprises a movable fine adjustment mechanism comprising a first motor, a sliding connection plate, and a first guide rail, wherein the first guide rail is fixed to the first movement mechanism, the first guide rail extends in the second direction, the first motor is connected to the sliding connection plate, the sliding connection plate is slidably connected to the first guide rail, the sliding connection plate is further connected to the clamping mechanism, and the distance between the weldment and the inner wall of the quartz tube in the second direction can be adjusted by driving the sliding connection plate to move on the first guide rail through the first motor.

6. The quartz tube welding apparatus of claim 4, wherein the second moving assembly comprises a second rail, a hoist, a second motor, and a moving plate, the second rail and the hoist are disposed on the first moving assembly, the second rail extends along a second direction, the moving plate is slidably disposed on the second rail and is slidably disposed along the second rail, the moving plate is connected to the mechanical arm, and the hoist is driven by the second motor to move the moving plate along the second direction.

7. The quartz tube welding device of claim 6, wherein the third moving assembly comprises a third guide rail, a support end bearing seat, a fixed end bearing seat, a screw rod and a hand wheel, wherein the third guide rail and the fixed end bearing seat are arranged on the moving plate, the third guide rail extends along the third direction, the mechanical arm is slidably arranged on the third guide rail, the support end bearing seat is arranged at the bottom end of the mechanical arm, the support end bearing seat is connected with the fixed end bearing seat through the screw rod, the hand wheel is arranged at the end part of the screw rod, and the relative distance between the support end bearing seat and the mechanical arm thereon and the fixed end bearing seat can be adjusted by rotating the hand wheel so as to drive the mechanical arm to move in the third direction.

8. The quartz tube welding apparatus of claim 1, wherein the external heating device comprises a tube rotation mechanism for rotating the quartz tube about a central axis, a second movement mechanism disposed on the second movement mechanism, and a second heating mechanism operable to move the second heating mechanism in an axial direction of the quartz tube.

9. The quartz tube welding apparatus of claim 7, wherein the tube rotation mechanism comprises a plurality of axially extending drive shafts, each drive shaft having a plurality of rollers fixedly disposed thereon, the rollers being in abutment with the bottom end of the outer wall of the quartz tube, the quartz tube being rotated about the central axis by rotation of the drive shaft.

10. The welding method of the quartz tube is characterized by comprising the following steps of:

Moving the weldment to a welding position of the inner wall of the quartz tube to be welded;

And heating the heating part of the outer wall of the quartz tube, and simultaneously heating the welding part and the weldment to enable the welding part and the weldment to be fused and welded, wherein the welding part corresponds to the heating part with respect to the inside and the outside of the quartz tube wall.