Regenerative device and flame type automatic welding machine

Abstract

The utility model provides a heat regeneration device and a flame type automatic welding machine, and belongs to the technical field of flame welding, the heat regeneration device comprises a cover body, the cover body is arranged above a welding fire row in a liftable manner, the bottom of the cover body is provided with a welding channel, the top of the welding channel is provided with a heat regeneration surface, and the heat regeneration surface protrudes towards the upper part of the welding fire row. According to the heat regeneration device, heat dissipation in the welding process can be effectively reduced, the repeated utilization rate of heat energy is increased, and energy consumption in the welding process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flame welding, in particular to a heat recovery device and a flame type automatic welding machine. Background Art

[0002] Flame automatic welding machines are widely used in the brazing process of air-conditioning tubular heat exchangers. The welding principle is to use the heat convection of the combustion flame reaction to perform temperature brazing on the heat exchanger products. The welding fire bar of the existing automatic flame welding machine usually adopts the main movement mode parallel to the main coordinate axis. The nozzles of the welding fire bar adopt a double-row arrangement structure, and each welding fire nozzle is provided with a transverse flame nozzle at its lower end to achieve the purpose of horizontal clamping welding on both sides of each welding point. However, during the combustion output of the existing welding fire bar, due to the inherent characteristics of the combustion flame reaction, more than 80% of the flame passes through the welding fire bar and dissipates upward, resulting in most of the heat energy being wasted, making the flame welding machine thermal efficiency low.

[0003] The industry has also made corresponding improvements to address the problem of low thermal efficiency of flame welding machines, such as increasing the preheating of the fire grate, adding fire-blocking devices to the fire grate, and redesigning the burner, but these improvements have failed to effectively improve the heat transfer efficiency during flame welding.

[0004] Therefore, it is necessary to improve the existing flame automatic welding machine to overcome the defects of the prior art. Utility Model Content

[0005] In order to overcome the problems existing in the related technology, one of the purposes of the utility model is to provide a heat recovery device, which is used in a flame automatic welding machine, can effectively reduce heat dissipation during welding, improve the reuse rate of thermal energy, and reduce energy consumption during welding.

[0006] A heat recovery device, comprising:

[0007] The cover body is liftable and arranged above the welding fire bar, a welding channel is arranged at the bottom of the cover body, a heat recovery surface is arranged at the top of the welding channel, and the heat recovery surface protrudes above the welding fire bar.

[0008] The heat recovery device can be installed in a flame automatic welding machine. The setting of the heat recovery surface allows the hot air flow in the welding process to flow to the heat recovery surface and surround the heat recovery surface, and then flow down and back to the welding fire bar, so that the hot air flow can reheat the production area of ​​the welding area to realize the waste heat utilization. Therefore, the heat recovery device can effectively reduce the heat dissipation in the welding process, improve the reuse rate of heat energy, and reduce the energy consumption in the welding process.

[0009] The device can also adjust the distance between the hood and the welding fire bar to meet the welding requirements of different workpieces.

[0010] In a preferred technical solution of the utility model, along the length direction of the welding channel, the cross-section of the heat recovery surface is an arc, a cone or a curved surface formed by multiple line segments.

[0011] The shape of the heat recovery surface of this embodiment can be set in various ways, as long as it is ensured that the heat recovery surface can reduce the dissipation of heat.

[0012] In a preferred technical solution of the utility model, along the length direction of the welding channel, the cross section of the heat recovery surface is a straight line, and the edge of the heat recovery surface is provided with a circular arc;

[0013] The width of the welding channel is D, and the radius of the arc of the edge of the heat recovery surface is R, wherein R<1 / 4D.

[0014] The arc-shaped heat recovery surface can reduce the resistance to the hot air flow, thereby improving the heat flow recovery effect, that is, improving the utilization rate of energy.

[0015] In a preferred technical solution of the utility model, a plurality of smoke exhaust holes are provided on both sides of the welding channel, the smoke exhaust holes penetrate the side walls of the welding channel, and the smoke exhaust holes are communicated with the welding channel;

[0016] The smoke exhaust holes are arranged on the cover body in an array of M rows and N columns, wherein M is a natural number greater than 2, and N is a natural number greater than 4.

[0017] In a preferred technical solution of the utility model, the diameter of the smoke exhaust holes is 4mm-6mm; in the array-arranged smoke exhaust holes, the center distance between two adjacent columns of the smoke exhaust holes is 50mm-70mm, and the center distance between two adjacent rows of the smoke exhaust holes is 10mm-20mm.

[0018] The smoke exhaust holes will cause the overflow of hot air to a certain extent, but they can release excess smoke in the early stage of ignition of flame welding, avoid violent combustion and explosion shocks, and ensure the stability of the welding process.

[0019] In a preferred technical solution of the utility model, a fireproof and heat-resistant coating is sprayed on the surface of the cover body.

[0020] The fireproof and heat-resistant coating can improve the stability and reliability of the cover under long-term high-temperature operation, making the cover anti-vibration and preventing it from failing due to ignition or explosion.

[0021] In a preferred technical solution of the utility model, mounting plates are respectively provided on both sides of the cover body along the length direction of the welding channel, and the bottom of the mounting plates is fixedly connected to the cover body;

[0022] The mounting plate is provided with a plurality of mounting holes, and the plurality of mounting holes are arranged along the height direction of the mounting plate. The mounting position of the mounting plate is adjusted through the mounting holes, thereby adjusting the distance between the cover body and the welding fire bar.

[0023] In a preferred technical solution of the utility model, a material inlet is provided on one side of the welding channel, and rounded corners are provided on the edges of both sides of the material inlet.

[0024] The material inlet is arranged in a form that is compatible with the workpiece to be welded, and the rounded corners can reduce the mutual collision between the workpiece and the material inlet, thereby improving the structural stability of the material inlet.

[0025] The second purpose of the utility model is to provide a flame type automatic welding machine, which comprises a welding fire bar, wherein the welding fire bar comprises two rows of flame nozzles arranged opposite to each other, and the heat recovery device as described above is arranged above the welding fire bar.

[0026] In a preferred technical solution of the utility model, it also includes a mounting bracket, the welding fire bar is arranged below the mounting bracket, and the heat recovery device can be lifted and lowered on the mounting bracket;

[0027] A conveying device for conveying workpieces is provided below the welding fire bar, and a workpiece clamp is provided on the conveying device.

[0028] The conveying device is used to convey the workpiece to be welded to the welding channel for welding, and the heat recovery device can reduce heat dissipation through the heat recovery device during the welding process, improve energy utilization, and thus reduce the welding cost of the welding machine.

[0029] The beneficial effects of the utility model are:

[0030] The utility model provides a heat recovery device, which includes a cover body, which can be lifted and arranged above the welding fire bar, a welding channel is arranged at the bottom of the cover body, and a heat recovery surface is arranged on the top of the welding channel, and the heat recovery surface protrudes above the welding fire bar. The heat recovery device can be installed in a flame automatic welding machine. The setting of the heat recovery surface allows the hot air flow in the welding process to flow to the heat recovery surface and surround the heat recovery surface, and then flow down and back to the welding fire bar, so that the hot air flow performs secondary heating on the production area of ​​the welding area to realize the utilization of waste heat. Therefore, the heat recovery device can effectively reduce the heat dissipation during the welding process, improve the reuse rate of thermal energy, and reduce the energy consumption during the welding process. In addition, the heat recovery device can be lifted and arranged above the welding fire bar, so that the position of the heat recovery device can be adjusted up and down during use to meet the welding requirements of different workpieces, ensure the consistency between the workpiece and the welding channel, make full use of the heat of flame welding, and improve the utilization rate of energy.

[0031] The present application also provides a flame automatic welding machine including the above-mentioned heat recovery device. During the welding process, the flame automatic welding machine reduces heat dissipation through the heat recovery device, improves energy utilization, and thus can reduce welding costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a three-dimensional diagram of a heat recovery device provided in an embodiment of the present application;

[0033] Figure 2 is a side view of a heat recovery device provided in an embodiment of the present application;

[0034] Figure 3 is a side view of a heat recovery device provided in an embodiment of the present application, wherein the cross section of the heat recovery surface is arc-shaped;

[0035] Figure 4 is a side view of a heat recovery device provided in an embodiment of the present application, wherein the cross section of the heat recovery surface is conical;

[0036] Figure 5 is a side view of a heat recovery device provided in an embodiment of the present application, wherein the cross section of the heat recovery surface is a curved surface formed by connecting a plurality of line segments;

[0037] Figure 6 is a front view of a heat recovery device provided in an embodiment of the present application arranged on a mounting bracket;

[0038] Figure 7 It is a side view of a heat recovery device provided in an embodiment of the present application arranged on a mounting bracket.

[0039] Reference numerals:

[0040] 1. Cover body; 11. Welding channel; 111. Material inlet; 112. Heat recovery surface; 12. Smoke exhaust hole; 2. Mounting plate; 21. Mounting hole; 3. Mounting bracket; 4. Welding fire bar; 5. Workpiece. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0042] Flame automatic welding machines are widely used in the brazing process of air-conditioning tubular heat exchangers. The welding principle is to use the heat convection of the combustion flame reaction to perform temperature brazing on the heat exchanger products. The welding fire bar of the existing automatic flame welding machine usually adopts the main movement mode parallel to the main coordinate axis. The nozzles of the welding fire bar adopt a double-row arrangement structure, and each welding fire nozzle is provided with a transverse flame nozzle at its lower end to achieve the purpose of horizontal clamping welding on both sides of each welding point. However, during the combustion output of the existing welding fire bar, due to the inherent characteristics of the combustion flame reaction, more than 80% of the flame passes through the welding fire bar and dissipates upward, resulting in most of the heat energy being wasted, making the flame welding machine thermal efficiency low.

[0043] The industry has also made corresponding improvements to address the problem of low thermal efficiency of flame welding machines, such as increasing the preheating of the fire bar, adding a fire-blocking device to the fire bar, and redesigning the burner, but these improvements have not been able to effectively improve the heat transfer efficiency during flame welding. Based on this, the present application provides a heat recovery device.

[0044] Example 1

[0045] like Figure 1-Figure 5 As shown, this embodiment provides a heat recovery device, which includes a cover body 1, which can be raised and lowered above the welding fire bar 4, a welding channel 11 is arranged at the bottom of the cover body 1, and a heat recovery surface 112 is arranged at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0046] It should be noted that the heat recovery surface 112 of the present application can be the reflux formed by the top structure of the welding channel 11 for the hot air flow. In a better solution, a reflective material can also be coated on the top of the welding channel 11 to allow the hot air flow to reflux better from the top of the welding channel 11.

[0047] During use, the heat recovery device can be installed in a flame automatic welding machine. The setting of the heat recovery surface 112 allows the hot air flow in the welding process to flow to the heat recovery surface 112 and surround the heat recovery surface 112, and then flow down and back to the welding fire bar 4, so that the hot air flow reheats the production area of ​​the welding area to realize the utilization of waste heat. Therefore, the heat recovery device can effectively reduce the heat dissipation during the welding process, improve the reuse rate of thermal energy, and reduce the energy consumption during the welding process. In addition, the heat recovery device can be raised and lowered above the welding fire bar 4, so that the position of the heat recovery device can be adjusted up and down during use to meet the welding requirements of different workpieces 5, ensure the consistency of the workpiece 5 and the welding channel 11, so as to make full use of the heat of flame welding and improve the utilization rate of energy.

[0048] In addition, the heat recovery device can also adjust the distance between the cover body 1 and the welding fire bar 4 to meet the welding requirements of different workpieces 5. It should be noted that the cover body 1 needs to cover the entire welding operation space.

[0049] More specifically, the structure of the cover body 1 of the present application can be set in various ways, for example, the cross section of the cover body 1 can be rectangular or other polygonal. The cover body 1 can be made of heat-resistant steel or stainless steel. The cover body 1 can be lifted and arranged above the welding fire bar 4. In this embodiment, the cover body 1 can be installed using a guide rail, so that the cover body 1 can move up and down above the welding fire bar 4 to change the distance between the cover body 1 and the welding fire bar 4.

[0050] The shape of the welding channel 11 should be compatible with the shape of the workpiece 5 to be welded to reduce the gap between the side wall of the welding channel 11 and the workpiece 5, thereby minimizing the heat spillover. When the heat recovery device is adjusted to the position above the welding fire bar 4, the welding operation begins. When the welding torch nozzle of the welding fire bar 4 is in a burning state, the flame is in a horizontal jet shape. Affected by the air density, the hot air flow escapes upward as 75% of gaseous molecules and plasma, and escapes below as less than 5% of thermal radiation. Most of the heat that escapes upward is blocked by the heat recovery surface 112 of the cover body 1, and a stable reflow temperature field is formed in the entire space of the workpiece 5 welding, ensuring the reuse of heat energy, directly reducing energy consumption by more than 50%, and simultaneously achieving the purpose of carbon reduction in the process.

[0051] Example 2

[0052] like Figure 1-Figure 5 As shown, this embodiment includes the above-mentioned heat recovery device, which includes a cover body 1, which can be raised and lowered above the welding fire bar 4, a welding channel 11 is arranged at the bottom of the cover body 1, and a heat recovery surface 112 is arranged at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0053] In this embodiment, along the length direction of the welding channel 11 , the cross section of the heat recovery surface 112 is an arc, a cone, or a curved surface formed by a plurality of line segments.

[0054] The shape of the heat recovery surface 112 of this embodiment can be set in various ways, as long as the heat recovery surface 112 can reduce the dissipation of heat.

[0055] In practical applications, the heat recovery surface 112 with an arc cross section can be a circular arc or an elliptical arc. The conical heat recovery surface 112 is in an inverted V shape to facilitate the collection and reflection of heat. The curved surface formed by multiple line segments can be in an inverted U shape. The setting of the heat recovery surface 112 needs to ensure that as much hot air flow as possible can be refluxed to the welding area of ​​the workpiece 5 to improve the utilization rate of thermal energy.

[0056] Example 3

[0057] like Figure 1-Figure 5As shown, this embodiment includes the above-mentioned heat recovery device, which includes a cover body 1, which can be raised and lowered above the welding fire bar 4, a welding channel 11 is arranged at the bottom of the cover body 1, and a heat recovery surface 112 is arranged at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0058] In this embodiment, along the length direction of the welding channel 11, the cross section of the heat recovery surface 112 is a straight line, and the edge of the heat recovery surface 112 is provided with an arc;

[0059] The width of the welding channel 11 is D, and the radius of the arc of the edge of the heat recovery surface 112 is R, wherein R<1 / 4D.

[0060] The heat recovery surface 112 of this size can prevent heat from accumulating on the heat recovery surface 112 when the airflow returns.

[0061] The arc-shaped heat recovery surface 112 can reduce the resistance to the hot air flow, thereby improving the heat flow recovery effect, that is, improving the utilization rate of energy.

[0062] Example 4

[0063] like Figure 1-Figure 5 As shown, this embodiment includes the above-mentioned heat recovery device, which includes a cover body 1, which can be raised and lowered above the welding fire bar 4, a welding channel 11 is arranged at the bottom of the cover body 1, and a heat recovery surface 112 is arranged at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0064] Along the length direction of the welding channel 11, the cross section of the heat recovery surface 112 is a straight line, and the edge of the heat recovery surface 112 is provided with an arc;

[0065] The width of the welding channel 11 is D, and the radius of the arc of the edge of the heat recovery surface 112 is R, wherein R<1 / 4D.

[0066] In this embodiment, a plurality of smoke exhaust holes 12 are provided on both sides of the welding channel 11, and the smoke exhaust holes 12 penetrate the side wall of the welding channel 11 and communicate with the welding channel 11;

[0067] The smoke exhaust holes 12 are arranged on the cover body 1 in an array of M rows and N columns, wherein M is a natural number greater than 2, and N is a natural number greater than 4.

[0068] During welding, a lot of smoke will be released at the initial stage of ignition. If the smoke is not discharged in time, violent combustion and explosion shocks may occur at the welding channel 11. Therefore, the present application releases excess smoke by setting up smoke exhaust holes 12 to avoid violent combustion and explosion shocks. In addition, the design of the array-type smoke exhaust holes 12 facilitates the exhaust of excess smoke from different directions of the cover body 1, thereby achieving efficient exhaust of smoke.

[0069] Example 5

[0070] like Figure 1-Figure 5 As shown, this embodiment includes the above-mentioned heat recovery device, which includes a cover body 1, which can be raised and lowered above the welding fire bar 4, a welding channel 11 is arranged at the bottom of the cover body 1, and a heat recovery surface 112 is arranged at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0071] Along the length direction of the welding channel 11, the cross section of the heat recovery surface 112 is a straight line, and the edge of the heat recovery surface 112 is provided with an arc;

[0072] The width of the welding channel 11 is D, and the radius of the arc of the edge of the heat recovery surface 112 is R, wherein R<1 / 4D.

[0073] In this embodiment, a plurality of smoke exhaust holes 12 are provided on both sides of the welding channel 11, and the smoke exhaust holes 12 penetrate the side wall of the welding channel 11 and communicate with the welding channel 11;

[0074] The smoke exhaust holes 12 are arranged on the cover body 1 in an array of M rows and N columns, wherein M is a natural number greater than 2, and N is a natural number greater than 4.

[0075] In this embodiment, the diameter of the smoke exhaust holes 12 is 4 mm-6 mm. In the array-arranged smoke exhaust holes 12, the center distance between two adjacent columns of the smoke exhaust holes 12 is 50 mm-70 mm, and the center distance between two adjacent rows of the smoke exhaust holes 12 is 10 mm-20 mm.

[0076] The smoke exhaust hole 12 designed in this size can release excess smoke to avoid violent combustion and explosion shocks while reducing the overflow of hot air as much as possible.

[0077] The present application also provides an implementation of the specific size of the cover body 1, which is as follows:

[0078] The bottom of the cover 1 is a rectangle with a length of 416 mm and a width of 236 mm, and the height of the cover 1 is 103 mm. The diameter of the smoke exhaust hole 12 is 5 mm, and the smoke exhaust holes 12 on both sides of the welding channel 11 are distributed in a rectangular shape (5 rows * 7 columns), with a center distance of 60 mm between columns and a center distance of 15 mm between rows. The width of the welding channel 11 is 76 mm and the height is 30 mm. The two sides of the inlet of the welding channel 11 adopt rounded transition.

[0079] Example 6

[0080] like Figure 1-Figure 5 As shown, this embodiment includes the above-mentioned heat recovery device, which includes a cover body 1, which can be raised and lowered above the welding fire bar 4, a welding channel 11 is arranged at the bottom of the cover body 1, and a heat recovery surface 112 is arranged at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0081] Specifically, along the length direction of the welding channel 11, the cross section of the heat recovery surface 112 is a straight line, and the edge of the heat recovery surface 112 is provided with a circular arc;

[0082] The width of the welding channel 11 is D, and the radius of the arc of the edge of the heat recovery surface 112 is R, wherein R<1 / 4D.

[0083] A plurality of smoke exhaust holes 12 are provided on both sides of the welding channel 11, the smoke exhaust holes 12 penetrate the side wall of the welding channel 11, and the smoke exhaust holes 12 are communicated with the welding channel 11;

[0084] The smoke exhaust holes 12 are arranged on the cover body 1 in an array of M rows and N columns, wherein M is a natural number greater than 2, and N is a natural number greater than 4.

[0085] The diameter of the smoke exhaust holes 12 is 4 mm-6 mm. In the array-arranged smoke exhaust holes 12, the distance between the centers of two adjacent columns of the smoke exhaust holes 12 is 50 mm-70 mm, and the distance between the centers of two adjacent rows of the smoke exhaust holes 12 is 10 mm-20 mm.

[0086] In this embodiment, the surface of the cover body 1 is sprayed with a fireproof and heat-resistant coating.

[0087] The fireproof and heat-resistant coating can improve the stability and reliability of the cover body 1 under long-term high-temperature operation, so that the cover body 1 has shock-resistant properties and will not fail due to ignition or explosion.

[0088] The fireproof and heat-resistant coating can be made of any one of steel structure fireproof coating, cable fireproof coating and tunnel fireproof coating.

[0089] Thick steel structure fire retardant coating can be used. The fireproof and heat-insulating principle of this fire retardant coating is that the coating basically does not change in volume when exposed to fire, but the thermal conductivity of the coating is very low, which delays the speed of heat transfer to the protected substrate. The fire retardant coating itself is non-combustible, which acts as a barrier and prevents heat radiation for steel components, avoiding direct attack of flames and high temperatures on steel components.

[0090] Example 7

[0091] like Figure 1-Figure 5 As shown, this embodiment includes the above-mentioned heat recovery device, which includes a cover body 1, which can be raised and lowered above the welding fire bar 4, a welding channel 11 is arranged at the bottom of the cover body 1, and a heat recovery surface 112 is arranged at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0092] More specifically, along the length direction of the welding channel 11, the cross section of the heat recovery surface 112 is a straight line, and the edge of the heat recovery surface 112 is provided with a circular arc;

[0093] The width of the welding channel 11 is D, and the radius of the arc of the edge of the heat recovery surface 112 is R, wherein R<1 / 4D.

[0094] A plurality of smoke exhaust holes 12 are provided on both sides of the welding channel 11, and the smoke exhaust holes 12 penetrate the side wall of the welding channel 11 and communicate with the welding channel 11;

[0095] The smoke exhaust holes 12 are arranged on the cover body 1 in an array of M rows and N columns, wherein M is a natural number greater than 2, and N is a natural number greater than 4.

[0096] The diameter of the smoke exhaust holes 12 is 4 mm-6 mm. In the array-arranged smoke exhaust holes 12, the distance between the centers of two adjacent columns of the smoke exhaust holes 12 is 50 mm-70 mm, and the distance between the centers of two adjacent rows of the smoke exhaust holes 12 is 10 mm-20 mm.

[0097] The surface of the cover body 1 is sprayed with a fireproof and heat-resistant coating.

[0098] In this embodiment, mounting plates 2 are respectively provided on both sides of the cover body 1 along the length direction of the welding channel 11, and the bottom of the mounting plates 2 is fixedly connected to the cover body 1;

[0099] The mounting plate 2 is provided with a plurality of mounting holes 21, and the plurality of mounting holes 21 are arranged along the height direction of the mounting plate 2. The mounting position of the mounting plate 2 is adjusted through the mounting holes 21, thereby adjusting the distance between the cover body 1 and the welding fire bar 4.

[0100] In actual applications, the mounting holes 21 are used to realize the mutual connection and fixation between the mounting plate 2 and the main body of the flame automatic welding machine. The mounting holes 21 can be arranged in two columns on the mounting plate 2, and the mounting holes 21 can be arranged in multiple rows along the height direction of the mounting plate 2 to facilitate installation and adjustment. Specifically, the distance between the centers of the mounting holes 21 in two columns of the mounting holes 21 can be 50 mm, and the distance between the centers of the mounting holes 21 in two adjacent rows along the height direction of the mounting plate 2 is 30 mm.

[0101] Furthermore, a material inlet 111 is provided on one side of the welding channel 11 , and rounded corners are provided on both side edges of the material inlet 111 .

[0102] The material inlet 111 is configured to be compatible with the workpiece 5 to be welded, and the rounded corners can reduce the mutual collision between the workpiece 5 and the material inlet 111 , thereby improving the structural stability of the material inlet 111 .

[0103] In addition, the rounded corners can also improve the efficiency of hot air flow backflow.

[0104] Example 8

[0105] like Figure 6-Figure 7 As shown, this embodiment provides a flame type automatic welding machine, which includes a welding fire bar 4, wherein the welding fire bar 4 includes two rows of flame nozzles arranged opposite to each other, and the heat recovery device as described above is arranged above the welding fire bar 4.

[0106] More specifically, the flame automatic welding machine further comprises a mounting bracket 3, the welding fire bar 4 is arranged below the mounting bracket 3, and the heat recovery device can be raised and lowered on the mounting bracket 3;

[0107] A conveying device for conveying the workpiece 5 is provided below the welding fire bar 4, and a workpiece clamp is provided on the conveying device. The conveying device and the workpiece clamp are not shown in the present application.

[0108] The workpiece clamp is used to clamp the workpiece 5 to be welded, and the conveying device conveys the workpiece 5 to the welding fire bar 4 for welding processing.

[0109] In this embodiment, the heat recovery device includes: the heat recovery device includes a cover body 1, the cover body 1 can be raised and lowered above the welding fire bar 4, a welding channel 11 is provided at the bottom of the cover body 1, and a heat recovery surface 112 is provided at the top of the welding channel 11, and the heat recovery surface 112 protrudes above the welding fire bar 4.

[0110] Along the length direction of the welding channel 11, the cross section of the heat recovery surface 112 is a straight line, and the edge of the heat recovery surface 112 is provided with an arc;

[0111] The width of the welding channel 11 is D, and the radius of the arc of the edge of the heat recovery surface 112 is R, wherein R<1 / 4D.

[0112] A plurality of smoke exhaust holes 12 are provided on both sides of the welding channel 11, and the smoke exhaust holes 12 penetrate the side wall of the welding channel 11 and communicate with the welding channel 11;

[0113] The smoke exhaust holes 12 are arranged on the cover body 1 in an array of M rows and N columns, wherein M is a natural number greater than 2, and N is a natural number greater than 4.

[0114] The diameter of the smoke exhaust holes 12 is 4 mm-6 mm. In the array-arranged smoke exhaust holes 12, the distance between the centers of two adjacent columns of the smoke exhaust holes 12 is 50 mm-70 mm, and the distance between the centers of two adjacent rows of the smoke exhaust holes 12 is 10 mm-20 mm.

[0115] The surface of the cover body 1 is sprayed with a fireproof and heat-resistant coating.

[0116] Along the length direction of the welding channel 11, mounting plates 2 are respectively provided on both sides of the cover body 1, and the bottom of the mounting plates 2 is fixedly connected to the cover body 1;

[0117] The mounting plate 2 is provided with a plurality of mounting holes 21, and the plurality of mounting holes 21 are arranged along the height direction of the mounting plate 2. The mounting position of the mounting plate 2 is adjusted through the mounting holes 21, thereby adjusting the distance between the cover body 1 and the welding fire bar 4.

[0118] The conveying device is used to convey the workpiece 5 to be welded to the welding channel 11 for welding, and the heat recovery device can reduce heat dissipation during the welding process through the heat recovery device, improve energy utilization, and thus reduce the welding cost of the welding machine.

[0119] In a more specific embodiment, the flame automatic welding machine of the present application mainly includes three parts: a mechanical system, an automatic control system and a welding system.

[0120] Mechanical system: The mechanical system mainly includes an automatic loading and unloading mechanism for the workpiece 5, an automatic station conversion mechanism for the workpiece 5, an automatic clamping mechanism for the workpiece 5, etc. In addition, the automatic flame welding machine also includes a frame, a conveying device arranged in the frame, a workpiece fixture arranged in the conveying device, a three-degree-of-freedom displacement mechanism arranged on the frame, and a welding fire bar 4 arranged on the three-degree-of-freedom displacement mechanism, wherein the welding fire bar 4 is located above the workpiece fixture and includes a plurality of vertically arranged welding nozzles, each of which is provided with a horizontal flame spraying port at its lower end.

[0121] Automatic control system: The automatic control system is mainly responsible for the automatic operation of the entire equipment, including the assembly and loading of the workpiece 5, the pre-setting of brazing material and brazing flux, the control of the heating method, and the control of the cooling and unloading of the brazed parts. The flame automatic welding machine of the present application is also equipped with sensors and electronic detection circuits, which can automatically guide and track the weld trajectory and implement closed-loop feedback control of the main welding parameters.

[0122] Welding system: This part is mainly responsible for the actual welding work, including preheating, conveying brazing material and brazing flux, cooling and other processes. The welding fire bar 4 of the new automatic flame welding machine adopts the main movement mode parallel to the main coordinate axis. The welding nozzle adopts a double-row arrangement structure, and each welding nozzle is provided with a horizontal flame nozzle at its lower end to achieve the purpose of horizontal clamp welding on both sides of each welding point. The welding system of the present application also includes the above-mentioned heat recovery device, which is arranged above the welding fire bar 4.

[0123] Through the coordinated work of the mechanical system, automatic control system and welding system of the flame automatic welding machine of the present application, the flame automatic welding machine can achieve efficient and high-quality welding work, and the flame automatic welding machine also has a high energy utilization rate and a low welding cost.

[0124] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0125] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0126] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0127] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0128] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heat recovery device, characterized in that: include: A cover body (1) is arranged to be raised and lowered above a welding fire bar (4); a welding channel (11) is arranged at the bottom of the cover body (1); a heat recovery surface (112) is arranged at the top of the welding channel (11); and the heat recovery surface (112) protrudes above the welding fire bar (4).

2. The heat recovery device according to claim 1, characterized in that: Along the length direction of the welding channel (11), the cross section of the heat recovery surface (112) is an arc, a cone, or a curved surface formed by connecting a plurality of line segments.

3. The heat recovery device according to claim 2, characterized in that: Along the length direction of the welding channel (11), the cross section of the heat recovery surface (112) is a straight line, and the edge of the heat recovery surface (112) is provided with a circular arc; The width of the welding channel (11) is D, and the radius of the arc of the edge of the heat recovery surface (112) is R, wherein R is less than 1 / 4D.

4. The heat recovery device according to claim 1, characterized in that: A plurality of smoke exhaust holes (12) are arranged on both sides of the welding channel (11), the smoke exhaust holes (12) penetrate the side walls of the welding channel (11), and the smoke exhaust holes (12) are in communication with the welding channel (11); The smoke exhaust holes (12) are arranged on the cover body (1) in an array of M rows and N columns, wherein M is a natural number greater than 2, and N is a natural number greater than 4.

5. The heat recovery device according to claim 4, characterized in that: The diameter of the smoke exhaust holes (12) is 4 mm to 6 mm. Among the smoke exhaust holes (12) arranged in an array, the distance between the centers of two adjacent columns of the smoke exhaust holes (12) is 50 mm to 70 mm, and the distance between the centers of two adjacent rows of the smoke exhaust holes (12) is 10 mm to 20 mm.

6. The heat recovery device according to any one of claims 1 to 5, characterized in that: The surface of the cover body (1) is sprayed with a fireproof and heat-resistant coating.

7. The heat recovery device according to any one of claims 1 to 5, characterized in that: Along the length direction of the welding channel (11), mounting plates (2) are respectively provided on both sides of the cover body (1), and the bottom of the mounting plates (2) is fixedly connected to the cover body (1); A plurality of mounting holes (21) are provided on the mounting plate (2), and the plurality of mounting holes (21) are arranged along the height direction of the mounting plate (2).

8. The heat recovery device according to any one of claims 1 to 5, characterized in that: A material inlet (111) is provided on one side of the welding channel (11), and rounded corners are provided on both side edges of the material inlet (111).

9. A flame type automatic welding machine, comprising a welding fire bar (4), wherein the welding fire bar (4) comprises two rows of flame nozzles arranged opposite to each other, characterized in that: A heat recovery device as described in any one of claims 1 to 8 is arranged above the welding fire bar (4).

10. The flame type automatic welding machine according to claim 9, characterized in that: It also comprises a mounting bracket (3), the welding fire bar (4) is arranged below the mounting bracket (3), and the heat recovery device can be raised and lowered on the mounting bracket (3); A conveying device for conveying workpieces is provided below the welding fire bar (4), and a workpiece clamp is provided on the conveying device.

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