CN220161496U - Heat exchanger header welding equipment - Google Patents

Abstract

The utility model provides heat exchanger header welding equipment which comprises a base, a workpiece positioning clamp, a welding heat source and a welding heat source moving mechanism, wherein the workpiece positioning clamp is arranged on the base; the workpiece positioning clamp is used for positioning a welded workpiece; the welding heat source includes: a high-frequency power supply, a heating auxiliary machine and a U-shaped sensor; the size of the opening of the U-shaped inductor is matched with the size of the welding ring; the U-shaped inductor is movably clamped on the outer side of the welding ring so as to heat the welding ring, and the welding ring is enabled to be in hot melting to weld the headers on two sides. The utility model can realize the whole row welding of the upper header of the heat exchange tube, and simultaneously can improve the welding quality and the welding efficiency of the upper header of the heat exchanger because the heat exchange tube is not influenced by smaller intervals between the headers.

Description

Heat exchanger header welding equipment

Technical Field

The utility model relates to the field of heat exchanger processing, in particular to heat exchanger header welding equipment.

Background

The fin type heat exchanger is heat exchange equipment which is most widely applied in gas and liquid heat exchangers, and in the production process of the heat exchanger, a plurality of welding links are involved, and the quality of welding directly influences the product quality of the heat exchanger; because the heat exchanger is provided with a large number of headers and the space between the headers is small, butt welding between the headers on the heat exchanger is a relatively complex and time-consuming procedure. In the prior art, butt welding between the headers generally adopts a manual welding mode, and the mode is limited by welding operation space, so that the welding quality between the headers is difficult to ensure, the welding efficiency is low, and the requirements of the actual production efficiency and the quality performance of the evaporator are difficult to meet.

Disclosure of Invention

In view of the above drawbacks of the prior art, the present utility model provides a heat exchanger header welding apparatus, so as to improve the technical problem that the welding quality and welding efficiency between headers cannot meet the requirements of heat exchanger production efficiency and product quality due to smaller intervals and more numbers between headers when the heat exchanger headers are welded.

To achieve the above and other related objects, the present utility model provides a heat exchanger header welding apparatus for use with a weld ring, comprising: a base, a workpiece positioning clamp and a welding heat source; the workpiece positioning fixture is arranged on the base and used for positioning the fin guard plate; the welding heat source includes: a high-frequency power supply, a heating auxiliary machine and a U-shaped sensor; the high-frequency power supply is electrically connected with the heating auxiliary machine; the U-shaped inductor is arranged on the heating auxiliary machine, the U-shaped opening faces the workpiece positioning clamp, and the opening size of the U-shaped inductor is matched with the size of the welding ring; the U-shaped inductor is movably clamped at the outer side of the welding ring so as to heat the welding ring, and the welding ring is used for hot melting to weld the headers at two sides.

In an example of the heat exchanger manifold welding apparatus of the present utility model, the heat exchanger manifold welding apparatus further includes a welding heat source moving mechanism, the welding heat source moving mechanism includes a first moving mechanism, the heating auxiliary machine is disposed on the first moving mechanism, and the first moving mechanism is disposed on the base and is driven by a first driving device to approach or depart from the workpiece positioning fixture along the length direction of the base.

In an example of the heat exchanger header welding apparatus of the present utility model, the welding heat source moving mechanism further includes a second moving mechanism, the heating auxiliary machine is disposed on the second moving mechanism, and the second moving mechanism is disposed on the first moving mechanism and is driven by a second driving device to slide along the width direction of the base.

In an example of the heat exchanger header welding equipment provided by the utility model, a limiting mechanism is arranged on one side, far away from the heating auxiliary machine, of the workpiece positioning clamp, the limiting mechanism is arranged on the base in a sliding manner along the width direction of the base, the limiting mechanism comprises a guide piece, a guide hole for guiding an opening of the U-shaped inductor is formed in the guide piece, and when the U-shaped inductor welds a header, two side edges of the U-shaped inductor are arranged in the guide hole in a penetrating manner.

In an example of the heat exchanger header welding device, a baffle is arranged in the guide hole, the baffle divides the guide hole into two guide cavities, the two guide cavities correspond to two side edges of the U-shaped inductor respectively, the thickness of the baffle corresponds to the opening width of the U-shaped inductor, one sides, far away from the baffle, of the two guide cavities are of inclined structures, and one end, with a larger section, of the guide cavity faces the U-shaped inductor.

In an example of the heat exchanger header welding apparatus of the present utility model, the limiting mechanism further includes a clamping assembly, where the clamping assembly is disposed on a side of the guide away from the workpiece positioning fixture and on an extension line of the opening of the U-shaped sensor, and limits lateral movement of both sides of the U-shaped sensor during welding.

In an example of the heat exchanger header welding device, the clamping assembly comprises two cylinders and two clamping blocks, the two cylinders are respectively arranged on two sides of the opening extending direction of the U-shaped sensor, the extending and retracting direction of the cylinders is perpendicular to the opening extending direction of the U-shaped sensor, the clamping blocks are connected with the piston ends of the cylinders, and the extending and retracting operation of the cylinders drives the clamping blocks to clamp or loosen two side edges of the U-shaped sensor.

In an example of the heat exchanger header welding apparatus of the present utility model, the clamping assembly further includes a positioning plate disposed between the two clamping blocks and positioned on an extension line of the opening of the U-shaped sensor, and a thickness of the positioning plate corresponds to an opening size of the U-shaped sensor.

In an example of the heat exchanger header welding apparatus of the present utility model, the locating plate and the baffle are both made of brass, and the clamping block is made of nylon.

In an example of the heat exchanger header welding apparatus of the present utility model, the limiting mechanism further includes a heat shield disposed on the base, and the separator and the positioning plate are disposed on the heat shield.

According to the heat exchanger header welding equipment, the U-shaped inductor is arranged, so that the welding rings at the butt joint positions of the whole row of headers can be subjected to high-frequency induction heating at the same time, the welding rings are melted at the butt joint positions of the headers, and the whole row of welding connection between the upper header and the lower header is realized; the welding mode is not affected by narrow intervals among the headers, so that welding quality among the headers can be guaranteed, meanwhile, because welding of the whole row of headers each time can be realized, compared with welding of a single header by traditional manual work, the welding efficiency of the headers is obviously improved, and further, the welding quality and the welding efficiency of the headers further meet the production efficiency and the product quality requirements of the heat exchanger.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of the weld locations of a heat exchanger header and weld ring of the present utility model;

FIG. 2 is a schematic view of the mounting location of the weld ring on the header at A in FIG. 1;

FIG. 3 is a schematic view of the overall structure of a heat exchanger header welding apparatus according to an embodiment of the present utility model;

fig. 4 is another view showing the overall structure of a heat exchanger header welding apparatus in accordance with an embodiment of the present utility model.

FIG. 5 is a partial structural view of a third movement mechanism and a spacing mechanism in a heat exchanger header welding apparatus in accordance with an embodiment of the present utility model;

FIG. 6 is a partial cross-sectional view of a guide member according to an embodiment of the present utility model;

FIG. 7 is a side view of the overall structure of a guide member according to an embodiment of the present utility model;

FIG. 8 is an enlarged view of area B of FIG. 4;

fig. 9 is a partial cross-sectional view taken along the direction C-C in fig. 5.

Description of element reference numerals

1. Heat exchanger header welding equipment; 11. a base; 111. a support frame; 12. a workpiece positioning fixture; 121. a clamping cavity; 13. welding a heat source; 131. a high frequency power supply; 132. heating the auxiliary machine; 133. a U-shaped inductor; 14. a welding heat source moving mechanism; 141. a first moving mechanism; 1411. a first support base; 1412. a first rail assembly; 1413. the first screw pair; 1414. a first motor; 142. a second moving mechanism; 1421. a second rail assembly; 1422. the second screw pair; 1423. a second motor; 15. a limiting mechanism; 151. a guide member; 1511. a guide hole; 1512. a partition plate; 1513. a guide chamber; 152. a clamp assembly; 1521. a cylinder; 1522. a clamping block; 1523. a positioning plate; 1524. a clamping cavity; 153. a heat insulating plate; 16. a third movement mechanism; 161. a second support base; 162. a third rail assembly; 163. the third screw pair; 164. a third motor; 2. a heat exchange tube; 21. a main pipe; 22. a main pipe header; 23. a fin guard plate; 24. a fin guard plate header; 3. and (5) welding a ring.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. 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 utility model belongs and to which this utility model belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this utility model may be used to practice the utility model.

It should be understood that the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used in this specification for descriptive purposes only and not for purposes of limitation, and that the utility model may be practiced without materially departing from the novel teachings and without departing from the scope of the utility model.

Referring to fig. 1 to 8, the present utility model provides a heat exchanger header welding apparatus 1, wherein a U-shaped inductor is provided, and a high-frequency induction heating is performed on a U-shaped inductor 133 to realize hot melting of a welding ring 3 sleeved at a butt joint position of a header, thereby realizing header welding at the butt joint position; the welding device is not affected by smaller intervals among the headers during welding, and can realize simultaneous welding of the whole row of headers at one time, so that the welding quality and the welding efficiency of the headers can be improved.

Referring to fig. 1, in the present utility model, a heat exchange tube 2 includes a main tube 21 and a fin guard plate 23, wherein a main tube header 22 is provided on the main tube 21, and a fin guard plate header 24 is provided on the fin guard plate 23, and the heat exchanger header welding apparatus 1 of the present utility model is mainly used for realizing welded connection between the main tube header 22 and the fin guard plate header 24 so as to realize header connection between the main tube 21 and the fin guard plate 23.

Referring to fig. 2 and 3, in an example of the present utility model, the heat exchanger header welding apparatus 1 is used with a weld ring 3, and includes: a base 11, a workpiece positioning fixture 12 and a welding heat source 13; the workpiece positioning clamp 12 is arranged on the base 11 and is used for positioning and clamping the fin guard plate; the workpiece positioning fixture 12 comprises a connecting seat and two side clamping plates, wherein the two side clamping plates are symmetrically arranged at two ends of the connecting seat, clamping cavities 121 which are opened along two ends of the length direction of the base 11 are formed between the two side clamping plates and the connecting seat, fin guard plates are arranged in the clamping cavities 121, and the connecting seat is arranged on the base 11. The welding heat source 13 includes: a high-frequency power source 131, a heating auxiliary machine 132, and a U-shaped inductor 133; the high-frequency power supply 131 is electrically connected with the heating auxiliary machine 132; the U-shaped sensor 133 is arranged on the heating auxiliary machine 132, the U-shaped opening faces the workpiece positioning clamp 12, and the size of the opening of the U-shaped sensor 133 is matched with the size of the welding ring 3; the high-frequency power supply 131 is arranged near the heating auxiliary machine 132, the U-shaped sensor 133 is fixed on one side wall of the heating auxiliary machine 132 near the clamping cavity 121 through bolts, and the cantilever arm of the U-shaped sensor 133 extends horizontally; the U-shaped inductor is movably clamped at the outer side of the welding ring so as to heat the welding ring, and the welding ring is used for hot melting to weld the headers at two sides.

When the heat exchanger header needs to be welded, the fin guard plate 23 is required to be placed in the workpiece positioning fixture in advance, the opening of the fin guard plate header 24 is vertically upwards, the welding ring 3 is sleeved at the opening of the fin guard plate header 24, the main pipe 21 is finally moved to be right above the fin guard plate 23, the main pipe header 22 is simultaneously inserted into the opening of the fin guard plate header 24, and the welding ring 3 is positioned at the joint of the main pipe header 22 and the fin guard plate header 24; the U-shaped inductors 133 are inserted into the whole row of headers, so that the U-shaped inductors 133 are clamped on two sides of the welding ring 3, the welding heat source 13 is operated, the U-shaped inductors 133 are heated at high frequency through the heating auxiliary machine 132, the clamped whole row of welding rings 3 are heated at high temperature after the temperature of the U-shaped inductors 133 is increased, after the welding rings 3 are hot-melted at high temperature, welding seams are formed at the butt joint positions of the headers, further butt joint welding between the whole row of fin guard plate headers 24 and the main pipe headers 22 is realized, and finally, the welding connection between the main pipe 21 and the fin guard plates 23 is completed. By arranging the U-shaped inductor 133, the welding ring 3 at the butt joint part of the whole row of the headers can be melted by performing high-frequency induction heating on the U-shaped inductor 133, so that the heat exchange tubes 2 can be positioned once to finish the welding of the whole row of the headers, and the welding efficiency of the headers can be obviously improved; meanwhile, the welding equipment is not affected by smaller intervals between the headers during welding, and therefore the welding quality of the headers can be improved.

Referring to fig. 2 and 3, in an example of the heat exchanger manifold welding apparatus 1 of the present utility model, the heat exchanger manifold welding apparatus 1 further includes a welding heat source moving mechanism 14, the welding heat source moving mechanism 14 includes a first moving mechanism 141, the heating auxiliary machine 132 is disposed on the first moving mechanism 141, and the first moving mechanism 141 is disposed on the base 11 and is driven by a first driving device to approach or separate from the workpiece positioning fixture 12 along the length direction of the base 11. The first moving mechanism 141 is slidably connected to the base 11, and the sliding connection mode may be any structure capable of realizing sliding, such as a linear sliding rail pair, a sliding chute, a sliding rod, and the like; in the present embodiment, the first moving mechanism 141 is directly slidably connected to the base 11 through a linear sliding rail pair; in other embodiments, the first moving mechanism 141 may also be indirectly slidably connected to the base 11 through other moving mechanisms; the first driving device can be any translational mechanism such as a screw nut pair, a motor, a gear rack, a motor, a cylinder and the like; in the embodiment, the first driving device adopts a structure of a screw nut pair and a motor; the first moving mechanism 141 includes a first supporting seat 1411, a first guide rail assembly 1412, a first screw pair 1413 and a first motor 1414, wherein a fixed end of the first guide rail assembly 1412 is disposed on the base 11 along a length direction, a moving end of the first guide rail assembly 1412 is connected to the first supporting seat 1411 through a bolt, two ends of a screw of the first screw pair 1413 are rotatably connected to the base 11 through a slewing bearing, the length direction is parallel to the length direction of the first guide rail assembly 1412, a nut of the first screw pair 1413 is connected to a bottom surface of the first supporting seat 1411 through a bolt, the first motor 1414 is fixed on the base 11 through a bolt, and the length directions of the screws of the first guide rail assembly 1412 and the first screw pair 1413 are both parallel to the length direction of the base 11; the heating sub-unit 132 is coupled to the upper surface of the first supporting base 1411 by, but not limited to, bolts. When the U-shaped inductor 133 is required to be inserted into the header for welding, the first motor 1414 is operated at this time, the first motor 1414 rotates to drive the screw rod to rotate, the screw nut moves, and then the heating auxiliary machine 132 is driven to move along the length direction of the base 11 under the guiding action of the first guide rail component 1412, the workpiece clamp 12 is positioned in a near way, after the U-shaped inductor 133 moves in place, the operation of the first motor 1414 is stopped, and then the heating auxiliary machine 132 stops moving along the length direction of the base 11, so that the automatic positioning of the U-shaped inductor 133 in the header is completed. The arrangement of the first moving mechanism 141 realizes the automatic positioning of the U-shaped sensor 133 in the header, improves the positioning efficiency and positioning precision of the positioning of the U-shaped sensor 133, and reduces the labor intensity of operators.

Referring to fig. 2 and 3, in an example of the heat exchanger header welding apparatus 1 of the present utility model, the welding heat source moving mechanism 14 further includes a second moving mechanism 142, the heating auxiliary unit 132 is disposed on the second moving mechanism 142, and the second moving mechanism 142 is disposed on the first moving mechanism 141 and is driven by a second driving device to slide along the width direction of the base 11. The second moving mechanism 142 is slidably connected to the first moving mechanism 141, and the sliding connection manner may be any sliding structure such as a linear sliding rail pair, a sliding chute, a sliding rod, etc.; in the present embodiment, the second moving mechanism 142 is directly slidingly connected to the first moving mechanism 141 through a linear sliding rail pair; the second driving device can be any translational mechanism such as a screw nut pair, a motor, a gear rack, a motor, a cylinder and the like; in the embodiment, the second driving device adopts a structure of a screw nut pair and a motor; the second moving mechanism 142 includes a second guide rail assembly 1421, a second screw pair 1422, and a second motor 1423, where a fixed end of the second guide rail assembly 1421 is disposed on an upper end surface of the first supporting seat 1411 along a width direction of the base 11, a moving end of the second guide rail assembly 1421 is connected to a bottom surface of the heating auxiliary machine 132 through a bolt, two ends of a screw of the second screw pair 1422 are rotatably connected to the bottom surface of the first supporting seat 1411 through a slewing bearing, and a length direction is parallel to a length direction of the second guide rail assembly 1421, a nut of the second screw pair 1422 can be directly connected to the bottom surface of the heating auxiliary machine 132 through a bolt, and also can be indirectly connected to the bottom surface of the heating auxiliary machine 132 through other connecting pieces, and the second motor 1423 is fixed to the first supporting seat 1411 through a bolt; the screw length direction of the second rail assembly 1421 and the second screw pair 1422 are parallel to the width direction of the base 11. When the U-shaped inductor 133 completes welding of the first row of headers, the second motor 1423 is operated at this time, the second motor 1423 drives the screw rod of the second screw rod pair 1422 to rotate, the screw nut moves, and then the heating auxiliary machine 132 is driven to move to the position of the second row of headers along the width direction of the base 11 under the guiding action of the second guide rail assembly 1421, and the second row of headers are welded, so that the operation is performed until the automatic welding of the multiple rows of headers on the heat exchanger is completed. By arranging the second moving mechanism 142, the U-shaped inductor 133 can automatically and transversely move among the multiple rows of headers, so that the heat exchanger can be positioned at one time, the multiple rows of headers can be automatically welded, the welding efficiency and repeated positioning accuracy of the multiple rows of headers are obviously improved, and the labor intensity of operators can be reduced.

Referring to fig. 2 to 5, in an example of the heat exchanger header welding apparatus 1 of the present utility model, a limiting mechanism 15 is disposed on a side of the workpiece positioning fixture 12 away from the heating auxiliary machine 132, the limiting mechanism 15 is slidably disposed on the base 11 along a width direction of the base 11, the limiting mechanism 15 includes a guide member 151, a guide hole 1511 for guiding an opening of the U-shaped sensor 133 is formed in the guide member 151, and when the U-shaped sensor 133 welds a header, two cantilever arms of the U-shaped sensor 133 are disposed in the guide hole 1511 in a penetrating manner. The base 11 is provided with a support 111, the stop gear 15 is arranged on the support 111 in a sliding manner through a third moving mechanism 16, the third moving mechanism 16 comprises a second support base 161, a third guide rail component 162, a third screw rod pair 163 and a third motor 164, the fixed end of the third guide rail is connected with the upper end of the support 111 through a bolt, the moving end of the third guide rail is connected with the second support base 161 through a bolt, the two ends of a screw rod of the third screw rod pair 163 are connected with the support 111 through a slewing bearing in a rotating manner, a nut of the third screw rod pair 163 is connected with the second support base 161 through a bolt, and the linear moving directions of the third guide rail component 162 and the third screw rod pair 163 are consistent with the width direction of the base 11. The guide member 151 is connected to the second support base 161 by a bolt, and the guide member 151 is located at a side close to the clamping cavity 121, and the guide hole 1511 of the guide member 151 is located on an extension line of the opening length direction of the U-shaped inductor 133. Because the U-shaped inductor 133 is easy to be heated and expanded in the heating process, the opening is enlarged, errors are generated in the heating position during header welding, the welding quality is affected, the opening errors of the end part of the U-shaped inductor 133 can be reduced by arranging the guide piece 151, and the welding quality is correspondingly improved.

Referring to fig. 5 and 6, in an example of the heat exchanger manifold welding apparatus 1 of the present utility model, a partition 1512 is disposed in the guide hole 1511, the partition 1512 divides the guide hole 1511 into two guide cavities 1513, the two guide cavities 1513 respectively correspond to two sides of the U-shaped inductor 133, the thickness of the partition 1512 corresponds to the opening width of the U-shaped inductor 133, one side of the two guide cavities 1513 away from the partition 1512 is in a slant structure, and one end of the guide cavity 1513 with a larger cross section faces the U-shaped inductor 133.. The baffle 1512 is symmetrically embedded in the middle position of the width direction of the guide hole 1511, and the length direction of the baffle 1512 is consistent with the opening length direction of the U-shaped sensor 133; the two cantilevered arms of the U-shaped inductor pass into and out of the two guide chambers 1513, respectively. Because after the U-shaped inductor 133 works for a period of time, the two overhanging arms of the U-shaped inductor 133 are easy to expand and deform outwards, and the outer side walls of the two guide cavities 1513 are set to be of an inclined surface structure, so that the two overhanging arms of the U-shaped inductor 133 after deformation smoothly enter the guide cavities 1513.

Referring to fig. 3 and 7, in an example of the heat exchanger header welding apparatus 1 of the present utility model, the limiting mechanism 15 further includes a clamping assembly 152, where the clamping assembly 152 is disposed on a side of the guide 151 away from the workpiece positioning fixture 12 and is located on an extension line of the opening length direction of the U-shaped sensor 133, so as to limit the lateral movement of the two suspension arms of the U-shaped sensor 133 during welding. The clamping components 152 are connected to the supporting frame 111 through bolts, a clamping cavity 1524 is formed between the clamping components 152, the U-shaped sensor 133 penetrates through the guide piece 151 and then stretches into the clamping cavity 1524, the width direction of the clamping cavity 1524 is matched with the width dimension of the opening of the U-shaped sensor 133, and the clamping components 152 control the opening of the two sides of the U-shaped sensor 133 in the clamping cavity 1524 by controlling the size of the clamping cavity 1524. Because the U-shaped inductor 133 produces thermal deformation in the heating process, the two sides of the U-shaped inductor 133 can produce force expanding outwards, and the clamping assembly 152 is arranged to produce a transverse clamping force on the outer sides of the two sides of the U-shaped inductor 133, so that the thermal deformation force applied to the two sides of the U-shaped inductor 133 can be balanced, and further the transverse distance deformation between the two sides of the U-shaped inductor 133 in the heating process can be reduced, the stability of the opening size of the U-shaped inductor 133 is maintained, and the stability of the heating effect of the welding ring is improved.

Referring to fig. 3 and 7, in an example of the heat exchanger manifold welding apparatus 1 of the present utility model, the clamping assembly 152 includes two cylinders 1521 and two clamping blocks 1522, the two cylinders 1521 are respectively disposed on two sides of the extending direction of the opening of the U-shaped sensor 133, the extending direction of the cylinders 1521 is perpendicular to the extending direction of the opening of the U-shaped sensor 133, the clamping blocks 1522 are connected to the piston ends of the cylinders 1521, and the extending operation of the cylinders 1521 drives the clamping blocks 1522 to clamp or unclamp the two sides of the U-shaped sensor 133. Two sets of cylinders 1521 are symmetrically arranged on two sides of the extending direction of the opening length direction of the U-shaped inductor 133 and are connected to the supporting frame 111 through bolts, one end of each clamping block 1522 is connected to the end portion of a piston rod of a cylinder 1521 on the same side through bolts, and the other end of each clamping block 1522 corresponds to the outer side face of one side of the U-shaped inductor 133. When the U-shaped sensor 133 is heated, the air cylinder 1521 drives the piston rod to extend towards the side edge of the U-shaped sensor 133, and drives the two side clamping blocks 1522 to move in opposite directions until the two side clamping blocks 1522 are pressed on the outer side surfaces of the two side edges of the U-shaped sensor 133, so that positioning and clamping of the opening width direction of the U-shaped sensor 133 are realized; when the U-shaped sensor 133 stops heating, the cylinder 1521 drives the piston rod to retract, and drives the two clamping blocks 1522 to separate from the outer sides of the two sides of the U-shaped sensor 133. The clamping block 1522 is driven by the air cylinder 1521 to clamp and position the two sides of the U-shaped inductor 133, the operation mode is simple and convenient, the control is convenient, and the adjustment of the clamping force of the two sides of the U-shaped inductor 133 is easy to realize. Referring to fig. 7, in an example of the heat exchanger header welding apparatus 1 of the present utility model, the clamping assembly 152 further includes a positioning plate 1523, the positioning plate 1523 is disposed between two clamping blocks 1522 and is located on an extension line of the opening length direction of the U-shaped sensor 133, and the thickness of the positioning plate 1523 corresponds to the opening size of the U-shaped sensor 133. The positioning plate 1523 is rectangular, the positioning plate 1523 is connected to the supporting frame 111 by bolts, and the two clamping blocks 1522 are symmetrically disposed on two sides of the positioning plate 1523 in the thickness direction. When the clamping blocks 1522 on both sides of the U-shaped sensor 133 simultaneously clamp both sides of the U-shaped sensor 133, at this time, inner walls of both sides of the U-shaped sensor 133 simultaneously abut against both side walls of the positioning plate 1523 in the thickness direction. The positioning plate 1523 is arranged, so that the clamping force of the cylinders 1521 on two sides can be controlled more easily when the U-shaped inductor 133 is clamped, and the opening size of the U-shaped inductor 133 can be clamped and positioned more accurately.

Referring to fig. 7, in an example of the heat exchanger header welding apparatus 1 of the present utility model, the positioning plate 1523 and the separator plate 1512 are both made of brass, and the clamping block 1522 is made of nylon. Because the U-shaped inductor 133 is tightly pressed against the inner side surfaces of the two sides with higher temperature and the two sides of the positioning plate 1523 in the clamping process, the heat of the U-shaped inductor 133 can be conducted to the positioning plate 1523, the positioning plate 1523 is made of brass, the heat of the two sides of the U-shaped inductor 133 can be better conducted, a good heat dissipation effect is achieved, and the thermal deformation of the two sides of the U-shaped inductor 133 in the heating process is further reduced. In the heating process of the U-shaped inductor 133, the temperature of the inner side walls of the two opposite sides is higher, the temperature of the outer side walls of the two sides is lower, the partition 1512 is abutted against the inner walls of the two sides of the U-shaped inductor 133, and the heat dissipation of the end part of the U-shaped inductor 133 can be improved by adopting brass with good heat conductivity, so that the deformation of the U-shaped inductor 133 in the heating process is reduced, and the heating effect of the U-shaped inductor 133 on a welding ring is improved. The clamping block 1522 is made of nylon, so that abrasion to two sides of the U-shaped sensor 133 can be reduced, impact force generated to two sides of the U-shaped sensor 133 in clamping moment by the air cylinder 1521 can be buffered, and damage to the two sides of the U-shaped sensor 133 in clamping process is reduced. Referring to fig. 8, the limiting mechanism 15 further includes a thermal insulation board 153, the thermal insulation board 153 is disposed on the base 11, and the separator 1512 and the positioning plate 1523 are disposed on the thermal insulation board 153. The heat insulation plate 153 is connected to the support 111 through bolts, so that the installation on the base 11 is realized; the separator 1512 and the positioning plate 1523 are connected to the heat insulation plate 153 by bolts, and the bottom surface of the separator 1512 and the bottom surface of the positioning plate 1523 are abutted against the upper end surface of the heat insulation plate 153. In the present utility model, the heat insulation plate 153 may be made of any material that can play a role in heat insulation, such as rubber material and nylon material, and in this embodiment, the heat insulation plate 153 is made of nylon material. The heat insulation plate 153 can reduce heat generated in the heating process of the U-shaped sensor 133 from being transferred to the supporting frame 111, so that damage to components such as the air cylinder 1521 on the supporting frame 111 caused by temperature rise is reduced.

According to the heat exchanger header welding equipment 1, the U-shaped inductor 133 is arranged, and the welding rings at the welding butt joint positions of the headers are heated by the U-shaped inductor 133, so that the welding rings are hot-melted at the welding butt joint positions of the headers, the whole row of welding of the upper headers of the heat exchanger is realized, and the welding efficiency of the headers is improved while the welding quality is met. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance. The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. A heat exchanger manifold welding apparatus for use with a weld ring, comprising:

a base;

the workpiece positioning clamp is arranged on the base to position and clamp the fin guard plate;

a welding heat source, comprising:

a high frequency power supply;

the heating auxiliary machine is electrically connected with the high-frequency power supply;

the U-shaped inductor is arranged on the heating auxiliary machine, a U-shaped opening faces the workpiece positioning clamp, and the opening size of the U-shaped inductor is matched with the size of the welding ring;

the U-shaped inductor is movably clamped at the outer side of the welding ring so as to heat the welding ring, and the welding ring is used for hot melting to weld the headers at two sides.

2. The heat exchanger header welding apparatus according to claim 1, further comprising a welding heat source moving mechanism including a first moving mechanism on which the heating sub-machine is provided, the first moving mechanism being provided on the base and being driven by a first driving device to approach or separate from the workpiece positioning jig in the base length direction.

3. The heat exchanger header welding apparatus according to claim 2, wherein the welding heat source moving mechanism further includes a second moving mechanism on which the heating sub-machine is provided, the second moving mechanism being provided on the first moving mechanism and being driven by a second driving device to slide in the base width direction.

4. The heat exchanger header welding apparatus according to claim 3, wherein a stopper mechanism is provided on a side of the workpiece positioning jig remote from the heating auxiliary machine, the stopper mechanism is slidably provided on the base in the base width direction, the stopper mechanism includes a guide member, a guide hole for guiding the opening of the U-shaped inductor is provided on the guide member, and both side edges of the U-shaped inductor are penetrated in the guide hole when the U-shaped inductor welds the header.

5. The heat exchanger header welding apparatus according to claim 4, wherein a partition plate is provided in the guide hole, the partition plate divides the guide hole into two guide cavities, the two guide cavities correspond to both side edges of the U-shaped inductor respectively, the thickness of the partition plate corresponds to the opening width of the U-shaped inductor, one side of the two guide cavities away from the partition plate is of an inclined surface structure, and one end of the guide cavity with a larger section faces the U-shaped inductor.

6. The heat exchanger header welding apparatus of claim 5, wherein the limiting mechanism further comprises a clamping assembly disposed on a side of the guide away from the workpiece positioning fixture and on an extension of the U-shaped sensor opening to limit lateral movement of both sides of the U-shaped sensor during welding.

7. The heat exchanger header welding apparatus according to claim 6, wherein the clamping assembly includes two cylinders and two clamping blocks, the two cylinders are respectively disposed at both sides of the opening extending direction of the U-shaped inductor, the telescopic direction of the cylinders is perpendicular to the opening extending direction of the U-shaped inductor, the clamping blocks are connected with piston ends of the cylinders, and the telescopic operation of the cylinders drives the clamping blocks to clamp or unclamp both sides of the U-shaped inductor.

8. The heat exchanger header welding apparatus of claim 7, wherein the clamping assembly further comprises a locating plate disposed intermediate the two clamping blocks and positioned on an extension of the U-shaped sensor opening, the thickness of the locating plate corresponding to the opening dimension of the U-shaped sensor.

9. The heat exchanger manifold welding apparatus as recited in claim 8 wherein said locating plate and said baffle are both brass and said clamping block is nylon.

10. The heat exchanger header welding apparatus according to any one of claims 8 to 9, wherein the stopper mechanism further comprises a heat insulating plate provided on the base, and the separator and the positioning plate are both provided on the heat insulating plate.