Welding head and welding device

Abstract

The utility model provides a kind of welding head and welding device, welding head includes: first spray gun head, for half ring, its inside has first air distribution passage, middle part is equipped with the first air inlet of intercommunication first air distribution passage;Second spray gun head, for half ring, its inside has second air distribution passage, middle part is equipped with the second air inlet of intercommunication second air distribution passage, second spray gun head and first spray gun head face symmetry setting, second spray gun head and first spray gun head enclose non-true circular ring, the line of first air inlet and second air inlet passes the center of ring, and the distance between first air inlet and second air inlet is greater than the length of other line segment on ring with endpoint;Nozzle, first spray gun head and second spray gun head are respectively equipped with multiple nozzles, and the injection direction of nozzle is towards the center line of ring formed by second spray gun head and first spray gun head.The welding head of the utility model improves the uniformity of circumferential temperature.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a welding head and welding device. Background Technology

[0002] In the semiconductor, photovoltaic, and optical fiber manufacturing industries, quartz tube welding is a critical process. Currently, mainstream automated welding equipment uses a circular welding ring to circumferentially heat the quartz tube. While this type of equipment is more stable than manual welding, the annular chamber effect causes uneven circumferential temperature distribution. The annular chamber effect refers to the uneven circumferential temperature caused by the pressure decay of the combustion gas along the weld ring. Therefore, the area closest to the combustion gas inlet has the highest flame temperature, while the area furthest from the inlet has the lowest temperature, creating a significant temperature gradient around the welding ring. This phenomenon directly leads to uneven heating at the weld joint, easily causing quality problems such as localized overheating, weak welds, and stress concentration. Utility Model Content

[0003] This utility model provides a welding head and welding device to at least solve some of the above-mentioned technical problems existing in the prior art.

[0004] In a first aspect, embodiments of the present invention provide a welding head, comprising: The first spray gun head is semi-circular, with a first air distribution channel inside and a first air inlet in the middle that connects to the first air distribution channel. The second spray gun head is semi-circular, with a second air distribution channel inside and a second air inlet in the middle that connects to the second air distribution channel. The second spray gun head and the first spray gun head are symmetrically arranged and form a non-circular ring. The line connecting the first air inlet and the second air inlet passes through the center of the ring, and the distance between the first air inlet and the second air inlet is greater than the length of other line segments whose endpoints are on the ring. The nozzles are provided on the first spray gun head and the second spray gun head respectively, and the spray direction of the nozzles is toward the center line of the ring formed by the second spray gun head and the first spray gun head.

[0005] In an optional embodiment, the second spray gun head and the first spray gun head are independent of each other, and the first air distribution channel and the second air distribution channel are not connected to each other.

[0006] In an optional embodiment, the welding head further includes: The welding ring support is provided on the first spray gun head and the second spray gun head respectively.

[0007] In an optional embodiment, the first spray gun head and the second spray gun head are connected by a quick-release structure to form the non-circular ring.

[0008] In an optional embodiment, the first air inlet is connected to a first air supply pipe, the second air inlet is connected to a second air supply pipe, the first air supply pipe is provided with a first regulating valve, the second air supply pipe is provided with a second regulating valve, and the first regulating valve and the second regulating valve are respectively provided with an oxygen inlet and a gas inlet.

[0009] In an optional embodiment, the first air inlet is connected to a first air inlet fixing block, the first air inlet fixing block has a first air chamber communicating with the first air inlet, and the first air supply pipe is connected to the first air inlet fixing block and communicates with the first air chamber. The second air inlet is connected to a second air inlet fixing block. The second air inlet fixing block has a second air chamber that communicates with the second air inlet. The second air supply pipe is connected to the second air inlet fixing block and communicates with the second air chamber.

[0010] In an optional embodiment, the nozzle, the first spray gun head, and the second spray gun head are located on the same plane.

[0011] In an optional embodiment, the two endpoints are on the ring, and the ratio of the maximum length to the minimum length of the line segment passing through the center of the ring is 1.1-1.3.

[0012] In an optional embodiment, the first spray gun head has a first cooling water channel inside, and the first spray gun head has a first water inlet and a first water outlet that communicate with the first cooling water channel; The second spray gun head has a second cooling water channel inside, and the second spray gun head has a second water inlet and a second water outlet that are connected to the second cooling water channel.

[0013] Secondly, this utility model provides a welding device, including the welding head described in this utility model embodiment.

[0014] The welding head of this invention is formed by a non-circular ring with a first spray gun head and a second spray gun head symmetrically arranged. The first and second gas distribution channels inside are also non-circular rings. The line connecting the first air inlet on the first spray gun head and the second air inlet on the second spray gun head passes through the center of the ring, and the distance between the first air inlet and the second air inlet is greater than the length of other line segments whose endpoints are on the ring. The combustion gas enters the first and second gas distribution channels through the first and second air inlets respectively, and is ejected from the nozzle for combustion. As the combustion gas flows a distance along the first and second spray gun heads respectively, the gas pressure decreases slightly, but the distance between the nozzle and the quartz tube wall gradually decreases, and the flame can act more concentratedly on the quartz tube, thereby compensating for the temperature drop caused by flow attenuation, making the temperature more uniform in the circumference of the quartz tube. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of the welding head embodiment 1 of this utility model is shown. Figure 1 ; Figure 2 A schematic diagram of the structure of the welding head embodiment 1 of this utility model is shown. Figure 2 ; Figure 3 A schematic diagram of the structure of the welding head embodiment 1 of this utility model is shown. Figure 3 ; Figure 4 A schematic diagram of the structure of the welding head embodiment two of this utility model is shown. Figure 1 ; Figure 5 A schematic diagram of the structure of the welding head embodiment two of this utility model is shown. Figure 2 ; Figure 6 This diagram shows a planar structure of the first spray gun head of the welding head according to an embodiment of the present invention, after being cut along the arc length and unfolded.

[0017] The reference numerals in the attached drawings are explained as follows: 1-First spray gun head, 11-First air distribution channel, 12-First cooling water channel, 2-Second spray gun head, 3-Nozzle, 4-First air inlet, 5-Second air inlet, 6-Welding ring bracket, 7-Oxygen inlet, 8-Gas inlet, 91-First regulating valve, 92-Second regulating valve, 101-First air inlet fixing block, 102-Second air inlet fixing block, 121-First air supply pipe, 122-Second air supply pipe, 131-First water inlet pipe, 132-First water outlet pipe, 141-Second water inlet pipe, 142-Second water outlet pipe, 15-Quick release structure, 151-First connecting block, 152-Second connecting block, 153-Fixing component. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] See Figures 1 to 6 This utility model provides a welding head, including a first spray gun head 1, a second spray gun head 2, and a nozzle 3. The first spray gun head 1 is semi-annular, with a first air distribution channel 11 inside and a first air inlet 4 connected to the first air distribution channel 11 in the middle. The second spray gun head 2 is semi-annular, with a second air distribution channel inside and a second air inlet 5 connected to the second air distribution channel in the middle. The second spray gun head 2 and the first spray gun head 1 are symmetrical and form a non-circular annulus. Since the first air distribution channel 11 and the second air distribution channel extend along the first spray gun head 1 and the second spray gun head 2 respectively, the first air distribution channel 11 and the second air distribution channel also form a non-circular annulus. The line connecting the first air inlet 4 and the second air inlet 5 passes through the center of the annulus, and the distance between the first air inlet 4 and the second air inlet 5 is greater than the length of other line segments whose endpoints are on the annulus.

[0022] The first spray gun head 1 and the second spray gun head 2 are respectively provided with multiple nozzles 3, and the spray direction of the nozzles 3 is towards the center line of the ring formed by the second spray gun head 2 and the first spray gun head 1.

[0023] In the welding process of this embodiment of the invention, the combustion gas enters the first gas distribution channel 11 and the second gas distribution channel through the first air inlet 4 and the second air inlet 5 respectively, and is sprayed out from the nozzle 3 for combustion. As the combustion gas flows along the first spray gun head 1 and the second spray gun head 2, the gas pressure decreases slightly due to flow attenuation. However, the distance between the nozzle 3 and the quartz tube wall gradually decreases, and the flame can act on the quartz tube more concentratedly, thereby compensating for the temperature drop caused by flow attenuation and making the temperature on the circumference of the quartz tube more uniform.

[0024] Under the same working conditions, the circumferential temperature difference of the welding head of this utility model can be controlled within ±15℃. Compared with the circumferential temperature difference of ±(40-60)℃ of the traditional circular full-ring welding ring, the temperature uniformity is improved by more than 60%, which can effectively reduce the defects of local overheating and stress concentration in quartz tube welding.

[0025] In this embodiment of the present invention, the non-circular ring formed by the first spray gun head 1 and the second spray gun head 2 can be symmetrical with respect to the first plane and the second plane respectively, the first plane and the second plane are perpendicular to each other, and the intersection line of the first plane and the second plane is collinear with the center line of the non-circular ring formed by the first spray gun head 1 and the second spray gun head 2.

[0026] The first spray nozzle 1 and the second spray nozzle 2 can be bent along conical curves. For example, the first spray nozzle 1 and the second spray nozzle 2 can be formed into semi-elliptical shapes. Alternatively, the first spray nozzle 1 and the second spray nozzle 2 can be formed into parabolic shapes.

[0027] In some embodiments, see Figures 1 to 3 The first gas distribution channel 11 and the second gas distribution channel are not interconnected. They are supplied with combustion gas independently through the first air inlet 4 and the second air inlet 5, allowing the combustion gas to flow from the middle to the distal end of each channel. The gas flow in the first and second gas distribution channels does not affect each other. During the flow, the pressure and flow rate of the gas decrease along the path due to the resistance of each pipeline, but the distance between the nozzle 3 and the surface of the quartz tube gradually decreases, compensating for the temperature drop caused by the flow attenuation. The first spray head 1 and the second spray head 2 are independent of each other. The first spray head 1 and the second spray head 2 are independent components, facilitating manufacturing.

[0028] In this embodiment of the invention, the first gas distribution channel 11 and the second gas distribution channel are not connected to each other and each has an independent air inlet. The gas flows independently in the first spray gun head 1 and the second spray gun head 2, without affecting each other.

[0029] The first spray head 1 and the second spray head 2 can be two independent components, thus ensuring that the first spray head 1 and the second spray head 2 are not connected to each other. Separating the first spray head 1 and the second spray head 2 into two independent components facilitates cleaning or replacement of the spray heads.

[0030] The first spray gun head 1 and the second spray gun head 2 can also be an integral structure, but the two are disconnected from each other by a sealing structure, so that the first spray gun head 1 and the second spray gun head 2 are not connected to each other.

[0031] In some embodiments, see Figures 1 to 3 The welding head of this utility model also includes a welding ring support 6, and the first spray gun head 1 and the second spray gun head 2 are respectively provided with welding ring supports 6. By setting the welding ring support 6, the first spray gun head 1 and the second spray gun head 2 are connected to the welding ring support 6, and the first spray gun head 1 and the second spray gun head 2 can be flexibly installed.

[0032] In some embodiments, the first spray gun head 1 and the second spray gun head 2 are connected by a quick-release structure 15. The quick-release structure 15 enables the rapid installation and removal of the first spray gun head 1 and the second spray gun head 2, facilitating assembly, maintenance, and replacement.

[0033] In the exemplary embodiment, the quick-release structure 15 includes, but is not limited to, a snap-on quick-release structure, a magnetic quick-release structure, and a bolt quick-tightening quick-release structure.

[0034] In specific implementation, see Figure 4 and Figure 5 The quick-release structure 15 includes a first connecting block 151 disposed on the first spray gun head 1, a second connecting block 152 disposed on the second spray gun head 2, and a fixing member 153. The fixing member 153 is used to fix the first connecting block 151 to the corresponding second connecting block 152. The fixing member 153 includes, but is not limited to, at least one of bolts, clamps, and magnetic components.

[0035] The first spray gun head 1 and the second spray gun head 2 are each semi-circular. The first spray gun head 1 has a first connecting block 151 at both ends, and the second spray gun head 2 has a second connecting block 152 at both ends. When the first spray gun head 1 and the second spray gun head 2 are spliced ​​into a ring, the first connecting blocks 151 at both ends of the first spray gun head 1 and the second connecting blocks 152 at both ends of the second spray gun head 2 are respectively opposite to each other. The first connecting blocks 151 and the corresponding second connecting blocks 152 are fixed by the fastener 153. The first spray gun head 1 and the second spray gun head 2 are connected into a non-circular ring.

[0036] See Figure 4 When the fastener 153 is a clamp, the clamp is sleeved on the outside of the first connecting block 151 and the second connecting block 152 that are assembled together. Tightening the clamp can fix the first connecting block 151 and the second connecting block 152.

[0037] The clamp is a split-hinged structure, encircling and fitting against the outer walls of the first connecting block 151 and the second connecting block 152. One side of the clamp is hinged by a pin, and the other side is equipped with an eccentric locking handle. After closing the two halves of the clamp, the clamp is tightened by the locking handle, pressing the mating ends of the two halves together. Coaxial positioning is achieved by the end face stops, fixing the first connecting block 151 and the second connecting block 152. Loosening the locking handle unlocks and releases the clamp for quick disassembly.

[0038] The clamp can be placed on the outside of the welding ring without interfering with the firing of the inner nozzle. It is resistant to high temperatures and can be disassembled and assembled without tools.

[0039] When the fastener 153 is a bolt, one of the first connecting block 151 and the second connecting block 152 has a through hole, and the other has a threaded hole. The bolt passes through the through hole and engages with the threaded hole to fix the first connecting block 151 and the second connecting block 152. Alternatively, the first connecting block 151 and the second connecting block 152 each have through holes. The bolt passes through the first connecting block 151 and the second connecting block 152 and engages with a nut to fix the first connecting block 151 and the second connecting block 152.

[0040] In some embodiments, see Figures 1 to 3 The first air inlet 4 is connected to the first air supply pipe 121, and the second air inlet 5 is connected to the second air supply pipe 122. The first air supply pipe 121 is equipped with a first regulating valve 91, and the second air supply pipe 122 is equipped with a second regulating valve 92. The first regulating valve 91 and the second regulating valve 92 respectively have an oxygen inlet 7 and a gas inlet 8. Oxygen and gas enter the first regulating valve 91 and the second regulating valve 92, are thoroughly mixed, and then transported by the first air supply pipe 121 and the second air supply pipe 122 to the first gas distribution channel 11 and the second gas distribution channel, respectively. The first regulating valve 91 and the second regulating valve 92 can adjust the gas pressure supplied to the first spray nozzle 1 and the second spray nozzle 2, respectively, enabling fine-tuning of the overall balance of combustion gases within the annular gas distribution channel formed by the first spray nozzle 1 and the second spray nozzle 2.

[0041] In some embodiments, a first air inlet 4 is connected to a first air inlet fixing block 101, the first air inlet fixing block 101 having a first air chamber communicating with the first air inlet 4, and a first air supply pipe 121 connected to the first air inlet fixing block 101 and communicating with the first air chamber. A second air inlet 5 is connected to a second air inlet fixing block 102, the second air inlet fixing block 102 having a second air chamber communicating with the second air inlet 5, and a second air supply pipe 122 connected to the second air inlet fixing block 102 and communicating with the second air chamber. By setting the first air inlet fixing block 101 and the second air inlet fixing block 102, it is convenient for the first spray gun head 1 and the second spray gun head 2 to be connected to the first air supply pipe 121 and the second air supply pipe 122 respectively, and the first air inlet fixing block 101 and the second air inlet fixing block 102 can be used to fix the first spray gun head 1 and the second spray gun head 2. In specific implementations, the first air inlet fixing block 101 and the second air inlet fixing block 102 may each have fixing holes, and be fixed to the welding device by screws.

[0042] In some embodiments, the nozzle 3, the first spray head 1, and the second spray head 2 are located on the same plane. The nozzle 3 may also be arranged on a conical surface. Each nozzle 3 is arranged along a generatrix of the conical surface.

[0043] In some embodiments, the two endpoints are on the ring, and the ratio of the maximum length to the minimum length of the line segment passing through the center of the ring is 1.1-1.3. For example, when the first spray gun head 1 and the second spray gun head 2 form an elliptical ring, the maximum length is the length of the major axis, the minimum length is the length of the minor axis, and the ratio of the major axis to the minor axis of the elliptical ring formed by the first spray gun head 1 and the second spray gun head 2 is 1.1-1.3.

[0044] In some embodiments, the first spray head 1 has a first cooling water channel 12 inside, and a first inlet and a first outlet communicating with the first cooling water channel 12. The second spray head 2 has a second cooling water channel inside, and a second inlet and a second outlet communicating with the second cooling water channel. The first inlet and the first outlet can be connected to a first inlet pipe 131 and a first outlet pipe 132, respectively, for cooling water circulation of the first spray head 1. The second inlet and the second outlet can be connected to a second inlet pipe 141 and a second outlet pipe 142, respectively, for cooling water circulation of the second spray head 2.

[0045] In some embodiments, see Figure 6 , Figure 6 This is a schematic diagram of the planar structure of the first spray gun head 1 after being cut along its arc length and unfolded. The internal structure of the second spray gun head 2 can be found in [reference needed]. Figure 6The cooling water channel and the air distribution channel can be formed by slotting the first spray gun head 1 and the second spray gun head 2, and then sealing the slots with a cover plate to form the first air distribution channel 11 and the first cooling water channel 12 on the first spray gun head 1, and the second air distribution channel and the second cooling water channel on the second spray gun head 2. In specific implementations, the slots can be formed on the inner or outer arc surface of the first spray gun head 1 and the second spray gun head 2, or on the fan-shaped surface of the first spray gun head 1 and the second spray gun head 2.

[0046] This utility model provides a welding device, including the welding head of this utility model embodiment.

[0047] The above description is merely an exemplary embodiment of this utility model and should not be construed as limiting the scope of this utility model. Any equivalent changes and modifications made in accordance with the teachings of this utility model shall still fall within the scope of this utility model. Other embodiments of this utility model will readily conceive of by those skilled in the art upon consideration of the specification and practice of the disclosure herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this utility model are defined by the claims.

Claims

1. A welding head, characterized in that, include: The first spray gun head is semi-circular, with a first air distribution channel inside and a first air inlet in the middle that connects to the first air distribution channel. The second spray gun head is semi-circular, with a second air distribution channel inside and a second air inlet in the middle that connects to the second air distribution channel. The second spray gun head and the first spray gun head are symmetrically arranged and form a non-circular ring. The line connecting the first air inlet and the second air inlet passes through the center of the ring, and the distance between the first air inlet and the second air inlet is greater than the length of other line segments whose endpoints are on the ring. The nozzles are provided on the first spray gun head and the second spray gun head respectively, and the spray direction of the nozzles is toward the center line of the ring formed by the second spray gun head and the first spray gun head.

2. The welding head according to claim 1, characterized in that, The second spray gun head and the first spray gun head are independent of each other, and the first air distribution channel and the second air distribution channel are not connected to each other.

3. The welding head according to claim 1, characterized in that, Also includes: The welding ring support is provided on the first spray gun head and the second spray gun head respectively.

4. The welding head according to claim 1, characterized in that, The first spray gun head and the second spray gun head are connected by a quick-release structure to form the non-circular ring.

5. The welding head according to claim 1, characterized in that, The first air inlet is connected to the first air supply pipe, and the second air inlet is connected to the second air supply pipe. The first air supply pipe is equipped with a first regulating valve, and the second air supply pipe is equipped with a second regulating valve. The first regulating valve and the second regulating valve are respectively equipped with an oxygen inlet and a gas inlet.

6. The welding joint according to claim 5, characterized in that, The first air inlet is connected to a first air inlet fixing block, the first air inlet fixing block has a first air chamber that communicates with the first air inlet, and the first air supply pipe is connected to the first air inlet fixing block and communicates with the first air chamber; The second air inlet is connected to a second air inlet fixing block. The second air inlet fixing block has a second air chamber that communicates with the second air inlet. The second air supply pipe is connected to the second air inlet fixing block and communicates with the second air chamber.

7. The welding joint according to claim 1, characterized in that, The nozzle, the first spray gun head, and the second spray gun head are located on the same plane.

8. The welding joint according to claim 1, characterized in that, Among the line segments whose two endpoints are on the ring and which pass through the center of the ring, the ratio of the maximum length to the minimum length is 1.1-1.

3.

9. The welding head according to claim 1, characterized in that, The first spray gun head has a first cooling water channel inside, and the first spray gun head has a first water inlet and a first water outlet that are connected to the first cooling water channel; The second spray gun head has a second cooling water channel inside, and the second spray gun head has a second water inlet and a second water outlet that are connected to the second cooling water channel.

10. A welding apparatus comprising the welding head as described in any one of claims 1-9.

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