Welding equipment for collecting short straight pipes of heat exchanger collecting pipe

Abstract

The utility model discloses a heat exchanger gathering pipe converging short straight pipe welding device which comprises a limiting mechanism and a welding mechanism, and the limiting mechanism is connected with the welding mechanism. A through hole is formed in the welding mechanism, a connecting port is further formed in the welding mechanism, and the connecting port is communicated with the through hole, so that a pipe fitting to be welded enters the welding mechanism through the connecting port and is located at the through hole; the limiting mechanism comprises an opening and closing clamp switch and an opening and closing clamp, the opening and closing clamp switch is connected with the opening and closing clamp, so that the opening and closing clamp switch controls opening and closing of the opening and closing clamp, and the opening and closing clamp covers the connecting port and the through hole when closed. The welding device has the effect that targeted welding is conducted according to the welding requirements that the pipe diameter of the converging straight pipe of the heat exchanger converging pipe is small, the converging straight pipe is short, and the space is extremely narrow.

Description

Technical Field

[0001] This application relates to the field of automatic welding equipment technology, and particularly to a welding equipment for the confluence short straight pipes of a heat exchanger manifold. Background Art

[0002] Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. In the prior art, it is very difficult to weld the confluence short straight pipes of a heat exchanger manifold. Basically, manual argon arc welding, manual brazing welding, or making the confluence straight pipes of the heat exchanger manifold very long. Due to the particularity of the confluence straight pipes of the heat exchanger manifold, the welding space is very limited, extremely narrow, and the pipe diameters are generally very small, usually between 12.7 mm and 15.88 mm in diameter, resulting in a multiple increase in the welding difficulty. Utility Model Content

[0003] In view of this, this application provides a welding equipment for the confluence short straight pipes of a heat exchanger manifold, which can meet the welding requirements of the confluence straight pipes of a heat exchanger manifold with small pipe diameters, short confluence straight pipe lengths, and extremely narrow spaces, and thus perform targeted welding.

[0004] The welding equipment for the confluence short straight pipes of a heat exchanger manifold provided by this application adopts the following technical solutions:

[0005] A welding equipment for the confluence short straight pipes of a heat exchanger manifold includes a limiting mechanism and a welding mechanism, and the limiting mechanism is connected to the welding mechanism; a through hole is provided on the welding mechanism, and a connection port is also provided on the welding mechanism, and the connection port is communicated with the through hole, so that the pipe fittings to be welded enter the welding mechanism through the connection port and are located at the through hole; the limiting mechanism includes an opening and closing jig switch and an opening and closing jig, and the opening and closing jig switch is connected to the opening and closing jig, so that the opening and closing jig switch controls the opening and closing of the opening and closing jig, and when the opening and closing jig is closed, it covers the connection port and the through hole.

[0006] By adopting the above technical solutions, the user opens the opening and closing jig through the opening and closing jig switch, so that the pipe fittings to be welded can be installed at the through hole through the connection port, and then can be directly welded through the welding mechanism. In this way, the user only needs to clamp the welding equipment for the confluence short straight pipes of a heat exchanger manifold on the pipe fittings to be welded, and the welding work can be conveniently completed without other adjustment work. Therefore, for the welding pipe fittings with small pipe diameters, short confluence straight pipe lengths, and extremely narrow spaces, it reduces the inconvenient operation of the user and is beneficial to improving the welding speed of the confluence short straight pipes of a heat exchanger manifold.

[0007] Preferably, the shape of the welding equipment for the confluence short straight pipes of a heat exchanger manifold is flat.

[0008] By adopting the above technical solutions, it is convenient to match the welding equipment for the confluence short straight pipes of the heat exchanger manifold with welding pipe fittings having a relatively small pipe diameter, a short length of the confluence straight pipe, and an extremely narrow space, thereby making the connection more convenient, and improving the welding speed of the confluence short straight pipes of the heat exchanger manifold.

[0009] Preferably, the welding mechanism includes a control switch, a protective cavity type, a rotatable large torch gear ring, a tungsten electrode, and an electrode. An inert gas pipeline is connected to the protective cavity type. The large torch gear ring is located inside the protective cavity type. The tungsten electrode is connected to the large torch gear ring. The electrode is arranged near the tungsten electrode and the pipe to be welded, so that an electric arc can be generated between the tungsten electrode and the pipe to be welded. The control switch is connected to the large torch gear ring; and through holes and connection ports are provided on both the protective cavity type and the large torch gear ring.

[0010] By adopting the above technical solutions, after the user installs the pipe fitting to be welded on the welding mechanism, the control switch is turned on. The protective cavity type is continuously filled with inert gas. The tungsten electrode on the large torch gear ring forms an electric arc with the pipe to be welded through the electrode, and then the pipe fitting to be welded at the position pointed by the tungsten electrode is welded. Since the large torch gear ring can rotate, the tungsten electrode can perform circumferential welding around the pipe fitting to be welded, thereby realizing the welding process of the pipe fitting to be welded.

[0011] Preferably, the electrode includes a positive electrode and a negative electrode. The positive electrode is arranged near the pipe fitting to be welded. The negative electrode is connected with a negative electrode water-cooled connecting plate. The negative electrode water-cooled connecting plate is installed near the welding position. Water circulation holes are provided on the negative electrode water-cooled connecting plate. The negative electrode water-cooled connecting plate is connected with a cooling water pipe through the water circulation holes.

[0012] By adopting the above technical solutions, the cooling water pipe cools the negative electrode water-cooled connecting plate through the water circulation holes, and then cools the temperature of the welding position.

[0013] Preferably, the opening and closing fixture includes a first fixture and a second fixture. Both the first fixture and the second fixture are connected to the welding mechanism, so that the first fixture and the second fixture can rotate. A tension spring is connected between the first fixture and the second fixture. The tension spring makes the first fixture and the second fixture approach each other, and the first fixture and the second fixture are relatively hermetically fitted near the through holes and the connection ports.

[0014] By adopting the above technical solutions, when the first fixture and the second fixture are closed, they are relatively sealed at the through holes and the connection openings, which is convenient for the welding work inside the welding mechanism, is conducive to filling the inert gas inside the welding mechanism, and prevents the influence of the arc light during the welding process on the surroundings.

[0015] Preferably, the opening and closing fixture switch includes a wrench and a moving member. The wrench is connected to the welding mechanism. One end of the wrench is connected to the moving member, so that the rotation of the wrench drives the movement of the moving member. Both sides of the moving member are respectively connected to the first fixture and the second fixture, so that the movement of the moving member drives the first fixture and the second fixture to rotate relatively or away from each other.

[0016] By adopting the above technical solution, the rotation of the wrench drives the movement of the moving member. Both sides of the moving member are respectively connected to the first fixture and the second fixture, so that the movement of the moving member drives the first fixture and the second fixture to rotate relatively or away from each other.

[0017] Preferably, the first fixture includes a first side plate, a second side plate and a first connecting plate. The first side plate is parallel to the second side plate. One end of the first connecting plate is connected to the first side plate, and the other end is connected to the second side plate. The first side plate and the second side plate are respectively connected to both sides of the welding mechanism. The second fixture includes a third side plate, a fourth side plate and a second connecting plate. The third side plate is parallel to the fourth side plate. One end of the second connecting plate is connected to the third side plate, and the other end is connected to the fourth side plate. The third side plate and the fourth side plate are respectively connected to both sides of the welding mechanism. The first connecting plate and the second connecting plate can cover the connection port. The first side plate, the second side plate, the third side plate and the fourth side plate near the through hole can cooperate with the pipe fittings to be welded.

[0018] By adopting the above technical solution, the first fixture and the second fixture are sleeved on the welding mechanism. Through the rotation of the first fixture and the second fixture on the welding mechanism, the sealing or unsealing of the through hole and the connection port by the first fixture and the second fixture is realized.

[0019] Preferably, flexible clips are provided near the through hole of the first fixture and the second fixture; flexible clips are also provided near the through hole of the welding mechanism; the flexible clips at the first fixture, the second fixture and the welding mechanism can be combined into a flexible fixture, and the flexible fixture cooperates with the pipe fittings to be welded.

[0020] By adopting the above technical solution, the first fixture and the second fixture clamp the pipe fittings to be welded through the flexible clips, and the flexible clips on the first fixture, the second fixture and the welding mechanism jointly form a flexible fixture surrounding the pipe fittings to be welded. On the one hand, the flexible fixture ensures that the pipe fittings to be welded will not be damaged by clamping during the welding process. On the other hand, it also relatively seals the gap between the welding mechanism and the limiting mechanism.

[0021] Preferably, transparent plates are provided near the connection port of the first connecting plate, the first fixture and the second fixture.

[0022] By adopting the above technical solution, it is convenient to observe the condition of the welding seam.

[0023] Preferably, the welding mechanism further includes a welding angle counter.

[0024] By adopting the above technical solution, it is used to detect the welding stroke.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The user opens the opening and closing fixture by operating the fixture switch, so that the pipe fittings to be welded can be installed at the through hole through the connection port, and then can be directly welded by the welding mechanism. In this way, the user only needs to clamp the heat exchanger manifold confluence short straight pipe welding equipment on the pipe fittings to be welded, and the welding work can be conveniently completed without other adjustment work. Therefore, for the welded pipe fittings with a small pipe diameter, a short confluence straight pipe length and a very narrow space, it reduces the inconvenient operation of the user and is beneficial to improving the welding speed of the heat exchanger manifold confluence short straight pipe welding.

[0027] 2. The shape of the heat exchanger manifold confluence short straight pipe welding equipment is flat, which is convenient to cooperate with the welded pipe fittings with a small pipe diameter, a short confluence straight pipe length and a very narrow space. Furthermore, the connection is more convenient, thereby improving the welding speed of the heat exchanger manifold confluence short straight pipe welding.

[0028] 3. The first fixture and the second fixture clamp the pipe fittings to be welded through the flexible clips, and the flexible clips on the first fixture, the second fixture and the welding mechanism jointly form a flexible fixture surrounding the pipe fittings to be welded. On the one hand, the flexible fixture prevents the pipe fittings to be welded from being damaged during the welding process, and on the other hand, it relatively seals the gap between the welding mechanism and the limiting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the heat exchanger manifold confluence short straight pipe welding equipment in this embodiment;

[0030] Figure 2 is a cross-sectional view of the heat exchanger manifold confluence short straight pipe welding equipment in this embodiment;

[0031] Figure 3 is a partial schematic structural diagram of the heat exchanger manifold confluence short straight pipe welding equipment in this embodiment;

[0032] Figure 4 is a partial schematic structural diagram of the heat exchanger manifold confluence short straight pipe welding equipment in this embodiment;

[0033] Figure 5 is a partial schematic structural diagram of the heat exchanger manifold confluence short straight pipe welding equipment in this embodiment;

[0034] Figure 6 It is a partial structural schematic diagram of the protection cavity type in this embodiment;

[0035] Figure 7 It is a partial structural schematic diagram of the protection cavity type in this embodiment.

[0036] Reference numerals: 1, limiting mechanism; 2, welding mechanism; 3, through hole; 4, connection port; 5, opening and closing jig switch; 6, opening and closing jig; 7, control switch; 8, protection cavity type; 9, large gear ring of welding torch; 10, tungsten electrode; 11, inert gas pipeline; 12, negative water-cooled connecting plate; 13, cooling water pipe; 14, first jig; 15, second jig; 16, tension spring; 17, wrench; 18, moving part; 19, flexible clip; 20, flexible jig; 21, transparent plate; 22, welding angle counter; 23, housing; 24, rear housing; 25, front housing; 26, positive conductive connection block; 27, drive shaft of transmission gear; 28, gear transmission assembly; 29, motor. Detailed implementation manners

[0037] The following further describes the present application in detail Figures 1-7 with reference to the attached drawings.

[0038] The embodiment of the present application discloses a welding device for a short straight pipe of a heat exchanger manifold.

[0039] Referring to Figure 1 and Figure 2 , it includes a housing 23, a limiting mechanism 1 and a welding mechanism 2. The limiting mechanism 1 and the welding mechanism 2 are at least partially located inside the housing 23, and the limiting mechanism 1 is connected to the welding mechanism, which is beneficial to further reducing the overall volume of the welding device. The components of the limiting mechanism 1 and the welding mechanism 2 are linearly arranged, making the overall shape of the welding device for the short straight pipe of the heat exchanger manifold flat, facilitating the welding device to weld the short straight pipes of the heat exchanger manifold with very limited welding space, extremely narrow, and generally small pipe diameters, generally with diameters ranging from 12.7 mm to 15.88 mm.

[0040] Refer to Figure 1 , Figure 2 and Figure 3, the welding mechanism 2 includes a motor 29, a welding torch large gear ring 9 and a protective cavity type 8. Both the welding torch large gear ring 9 and the protective cavity type 8 are flat sheets. The housing 23 includes a rear housing 24 and a front housing 25. One end of the rear housing 24 away from the front housing 25 is provided with a bellows. The motor 29 is arranged inside the rear housing 24. A control switch 7 is screwed on the surface of the rear housing 24. The control switch 7 is electrically connected to the motor 29. One end of the rear housing 24 near the front housing 25 is screwed with a positive conductive connection block 26. A cooling water pipe 13 is connected through the positive conductive connection block 26. An inert gas pipeline 11 is also connected through the positive conductive connection block. The protective cavity includes a first cavity and a second cavity. The first cavity and the second cavity are respectively screwed on both sides of one end of the positive conductive connection block 26 away from the rear housing 24. The front housing 25 is screwed on both sides of the first cavity and the second cavity. The inert gas pipeline 11 is communicated with the inside of the protective cavity.

[0041] Reference Figure 4 , one end of the motor 29 passes through the positive conductive connection block 26 and is screwed with a transmission gear drive shaft 27. The motor 29 is provided with a positive pole at the transmission gear drive shaft 27. One end of the transmission gear drive shaft 27 away from the electrode is connected with a gear transmission assembly 28. One end of the gear transmission assembly 28 away from the transmission gear drive shaft 27 is connected with the welding torch large gear ring 9. When the motor 29 rotates, it drives the transmission gear drive shaft 27, and then drives the gear transmission assembly 28, thereby realizing the rotation of the welding torch large gear ring 9. A through hole 3 is opened on the welding torch large gear ring 9. A connection port 4 is opened on the side wall of the through hole 3 of the welding torch large gear ring 9. Radial air holes are also opened on the welding torch large gear ring 9, so that the inert gas in the protective cavity can flow through the air holes of the welding torch large gear ring 9. A tungsten electrode 10 is connected to the welding torch large gear ring 9.

[0042] After the user inserts the pipe to be welded through the connection port 4 and installs it at the through hole 3 of the welding mechanism 2, the control switch 7 is turned on. The protective cavity type 8 is continuously filled with inert gas. An electric arc is formed between the tungsten electrode 10 on the welding torch large gear ring 9 and the pipe to be welded through the electrode, and then the pipe to be welded at the position pointed by the tungsten electrode 10 is welded. The welding torch large gear ring 9 rotates under the action of the motor 29, so that the tungsten electrode 10 can perform circumferential welding around the pipe to be welded. The cooling water pipe 13 cools the negative water-cooled connection plate 12 through the water circulation hole, and then cools the temperature of the welding position. In this way, the welding process of the pipe to be welded is realized.

[0043] Reference Figure 2 and Figure 3The limiting mechanism 1 includes an opening and closing clamp switch 5 and an opening and closing clamp 6. The opening and closing clamp 6 includes a first clamp 14 and a second clamp 15. The first clamp 14 and the second clamp 15 are in a "U" shape, so that the two ends of the first clamp 14 are rotatably connected to the two ends of the protective cavity respectively, so that the first clamp 14 is sleeved and rotated on the protective cavity, and the second clamp 15 is similar. The first clamp 14 and the second clamp 15 can at least cover the general through holes 3 and the connecting ports 4, so that the opening and closing clamp 6 can cover all the through holes 3 and the connecting ports 4. A tension spring 16 is screwed between the first clamp 14 and the second clamp 15. The opening and closing clamp switch 5 includes a wrench 17 and a moving part 18. The lower part of the wrench 17 is located between the protective cavity and the front shell 25, and the upper part of the wrench 17 is located outside the shell 23. The wrench 17 is shaped like a mirror image of the word "factory". The lower part is rotatably connected to the protective cavity, so that when the user pulls the wrench 17, the wrench 17 rotates around the protective cavity, and one end of the wrench 17 located in the shell 23 is connected to a moving part 18, and the moving part 18 is located between the rotation points of the first clamp 14 and the second clamp 15, and the moving part 18 cooperates with the rotation points of the first clamp 14 and the second clamp 15, so that when the moving part 18 moves, it drives the first clamp 14 and the second clamp 15 away from each other. When the user releases the wrench 17, the first clamp 14 and the second clamp 15 return to their original state under the action of the tension spring 16, and when the first clamp 14 and the second clamp 15 are closed, the through hole 3 and the connecting port 4 are relatively sealed, thereby facilitating the welding work in the welding mechanism 2, and is conducive to the inert gas in the welding mechanism 2 filling the welding mechanism 2, and preventing the arc light of the welding process from affecting the surroundings.

[0044] Furthermore, in this embodiment, a welding angle counter 22 is provided on the motor 29 for detecting the welding stroke.

[0045] Furthermore, in the present embodiment, the first clamp 14 and the second clamp 15 are screwed with a flexible clip 19 near the through hole 3, and the protective cavity is also screwed with a flexible clip 19, and the first clamp 14, the second clamp 15 and the flexible clip 19 on the protective cavity can form a flexible clamp 20 in the shape of a circular ring. The first clamp 14 and the second clamp 15 clamp the pipe to be welded through the flexible clip 19, and the first clamp 14, the second clamp 15 and the flexible clip 19 on the welding mechanism 2 together form a flexible clamp 20 surrounding the pipe to be welded. On the one hand, the flexible clamp 20 prevents the pipe to be welded from being clamped and damaged during the welding process, and on the other hand, it relatively seals the gap between the welding mechanism 2 and the limiting mechanism 1.

[0046] Further, in this embodiment, the first fixture 14 includes a first side plate, a second side plate and a first connecting plate. The first side plate is parallel to the second side plate. One end of the first connecting plate is connected to the first side plate, and the other end is connected to the second side plate. The first side plate and the second side plate are respectively hinged to both sides of the protection cavity; the second fixture 15 includes a third side plate, a fourth side plate and a second connecting plate. The third side plate is parallel to the fourth side plate. One end of the second connecting plate is connected to the third side plate, and the other end is connected to the fourth side plate. The third side plate and the fourth side plate are respectively hinged to both sides of the protection cavity; the first connecting plate and the second connecting plate can cover the connection port 4, and the first side plate, the second side plate, the third side plate and the fourth side plate near the through hole 3 can cooperate with the pipe fittings to be welded.

[0047] Further, in this embodiment, a transparent plate 21 is provided near the connection port 4 of the first fixture 14 and the second fixture 15, so that the user can observe the welding seam condition through the transparent plate 21.

[0048] Further, in this embodiment, refer to Figure 5 , the cooling water pipe 13 is connected with a negative water-cooled connecting plate 12. The negative water-cooled connecting plate 12 is provided with a water circulation hole communicated with the cooling water pipe 13. A through hole 3 is opened in the center of the negative water-cooled connecting plate 12. A connection port 4 is opened on the side wall of the through hole 3 of the negative water-cooled connecting plate 12, so that the negative water-cooled connecting plate 12 is generally in the shape of a six-sevenths ring. The negative water-cooled connecting plate 12 is arranged near the welding torch large gear ring 9, and the negative water-cooled connecting plate 12 is connected with the tungsten electrode 10.

[0049] Further, in this embodiment, refer to Figure 6 and Figure 7 , the first cavity and the second cavity are generally the same. Through holes 3 are opened on both the first cavity and the second cavity. Connection ports 4 are opened on the side walls of the through holes 3 of the first cavity and the second cavity. A groove for facilitating the cooperation with the inert gas pipe 11, the transmission gear drive shaft 27, the gear transmission assembly 28 and the welding torch large gear ring 9 is opened on the first cavity. A groove for facilitating the cooperation with the cooling water pipe 13, the transmission gear drive shaft 27 and the negative water-cooled connecting plate 12 is opened on the second cavity.

[0050] Further, in this embodiment, refer to Figure 4 , the end tooth shape of the transmission gear drive shaft 27 is a bevel tooth shape. The gear transmission assembly includes a large gear and four small gears. One side of the large gear is connected to the transmission gear drive shaft 27, so that the rotation of the transmission gear drive shaft 27 along the end plane direction of the motor 29 is converted into a rotation in the vertical direction. The large gear rotates with two small gears respectively, and the two small gears are respectively connected with small gears through gears. The connected small gears are all connected with the welding torch large gear ring 9 through gears.

[0051] Further, in this embodiment, the motor 29 can be either a unidirectional rotation motor 29 or a bidirectional rotation motor 29.

[0052] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A heat exchanger manifold short straight pipe welding device, characterized in that: It comprises a limiting mechanism (1) and a welding mechanism (2), wherein the limiting mechanism (1) is connected to the welding mechanism (2); The welding mechanism (2) is provided with a through hole (3), and the welding mechanism (2) is also provided with a connecting port (4), the connecting port (4) being in communication with the through hole (3), so that the pipe to be welded enters the welding mechanism (2) through the connecting port (4) and is located at the through hole (3); The limiting mechanism (1) comprises an opening and closing clamp switch (5) and an opening and closing clamp (6), wherein the opening and closing clamp switch (5) is connected to the opening and closing clamp (6) so that the opening and closing clamp switch (5) controls the opening and closing of the opening and closing clamp (6), and the opening and closing clamp (6) covers the connection port (4) and the through hole (3) when closed.

2. The heat exchanger manifold short straight pipe welding equipment according to claim 1 is characterized in that: The heat exchanger converging pipe converging short straight pipe welding device is flat in shape.

3. The heat exchanger manifold short straight pipe welding equipment according to claim 1, characterized in that: The welding mechanism (2) comprises a control switch (7), a protective chamber (8), a rotatable welding torch gear ring (9), a tungsten pole (10) and an electrode. The protective chamber (8) is connected to an inert gas pipeline (11). The welding torch gear ring (9) is located in the protective chamber (8). The tungsten pole (10) is connected to the welding torch gear ring (9). The electrode is arranged near the tungsten pole (10) and the pipe to be welded so that an arc can be generated between the tungsten pole (10) and the pipe to be welded. The control switch (7) is connected to the welding torch gear ring (9). The protective chamber (8) and the welding torch gear ring (9) are both provided with through holes (3) and connection ports (4).

4. The heat exchanger manifold converging short straight pipe welding equipment according to claim 3 is characterized in that: The electrode comprises a positive electrode and a negative electrode, the positive electrode is arranged near the pipe to be welded, the negative electrode is connected to a negative electrode water-cooling connecting plate (12), the negative electrode water-cooling connecting plate (12) is installed near the welding position, a water circulation hole is opened on the negative electrode water-cooling connecting plate (12), and the negative electrode water-cooling connecting plate (12) is connected to a cooling water pipe (13) through the water circulation hole.

5. The heat exchanger manifold short straight pipe welding equipment according to claim 1, characterized in that: The opening and closing clamp (6) comprises a first clamp (14) and a second clamp (15), and the first clamp (14) and the second clamp (15) are both connected to the welding mechanism (2) so that the first clamp (14) and the second clamp (15) are rotatable, and a tension spring (16) is connected between the first clamp (14) and the second clamp (15), and the tension spring (16) makes the first clamp (14) and the second clamp (15) close to each other, and the first clamp (14) and the second clamp (15) are relatively sealed near the through hole (3) and the connecting port (4).

6. The heat exchanger manifold converging short straight pipe welding equipment according to claim 5, characterized in that: The clamp opening and closing switch (5) comprises a wrench (17) and a moving part (18), wherein the wrench (17) is connected to the welding mechanism (2), and one end of the wrench (17) is connected to the moving part (18), so that the wrench (17) rotates to drive the moving part (18) to move, and the two sides of the moving part (18) are respectively connected to the first clamp (14) and the second clamp (15), so that the moving part (18) moves to drive the first clamp (14) and the second clamp (15) to rotate relative to or opposite to each other.

7. The heat exchanger manifold short straight pipe welding equipment according to claim 5, characterized in that: The first clamp (14) includes a first side plate, a second side plate and a first connecting plate, the first side plate is parallel to the second side plate, one end of the first connecting plate is connected to the first side plate, and the other end is connected to the second side plate, the first side plate and the second side plate are respectively connected to the two sides of the welding mechanism (2); the second clamp (15) includes a third side plate, a fourth side plate and a second connecting plate, the third side plate is parallel to the fourth side plate, one end of the second connecting plate is connected to the third side plate, and the other end is connected to the fourth side plate, the third side plate and the fourth side plate are respectively connected to the two sides of the welding mechanism (2); the first connecting plate and the second connecting plate can cover the connecting port (4), and the first side plate, the second side plate, the third side plate and the fourth side plate can cooperate with the pipe to be welded near the through hole (3).

8. The heat exchanger manifold short straight pipe welding equipment according to claim 5, characterized in that: The first clamp (14) and the second clamp (15) are provided with flexible clips (19) near the through hole (3); the welding mechanism (2) is also provided with a flexible clip (19) near the through hole (3); the first clamp (14), the second clamp (15) and the flexible clip (19) at the welding mechanism (2) can be combined into a flexible clamp (20), and the flexible clamp (20) cooperates with the pipe to be welded.

9. The heat exchanger manifold short straight pipe welding equipment according to claim 5, characterized in that: The first clamp (14) and the second clamp (15) are provided with a transparent plate (21) near the connection port (4).

10. The heat exchanger manifold short straight pipe welding equipment according to claim 1, characterized in that: The welding mechanism (2) also includes a welding angle counter (22).

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