A metal pipe fitting welding apparatus and method of use thereof

Abstract

The present application relates to the technical field of metal welding, comprising: a fixed base, the surface of the fixed base is provided with a fixed seat, the surface of the fixed seat is provided with a pre-limiting assembly, the surface of the fixed seat is overlapped with a metal pipe fitting, and the pre-limiting assembly limits the metal pipe fitting; the surface of the fixed base is provided with an intermediate seat, the surface of the intermediate seat is provided with a movable block, the surface of the movable block is provided with a welding head, and the surface of the movable block is provided with a fixing assembly which fixes the welding head; beneficial effects are that under the action of the top-holding plate and the limiting plate, the metal pipe fitting cannot easily displace, the metal pipe fitting is better clamped by the electromagnetic push rod, and the welding of the metal pipe fitting is more convenient; when the welding head needs to be replaced, one end of the pull rod is pulled to move the hoop plate out, the clamping plate can be separated from the surface of the fixed groove, the welding head can be removed, replacement is completed, and overall use is more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal welding, in particular to a metal pipe welding device and a using method thereof. BACKGROUND

[0002] Welding is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. When welding metal pipes, the two pipes need to be precisely butt-jointed before welding.

[0003] In the prior art, the metal pipe is placed on the welding device, and the metal pipe is clamped and fixed by using electromagnetic push rods, thereby realizing precise butt-jointing of the metal pipe. The bottom end of the electric telescopic rod is fixedly connected with a welding head, so as to realize adjustment of the welding head, thereby facilitating rapid welding of metal pipes of different sizes.

[0004] However, when multiple sets of electromagnetic push rods are used to clamp the metal pipe, it cannot be ensured that the metal pipe will not displace when being held by the electromagnetic push rods. Moreover, the welding head is fixedly connected, and when the welding head is damaged during welding, it is not easy to replace the welding head. SUMMARY

[0005] The purpose of the present application is to provide a metal pipe welding device and a using method thereof to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a fixed base, the surface of the fixed base is provided with a fixed seat, the surface of the fixed seat is provided with a pre-limiting assembly, the surface of the fixed seat is overlapped with a metal pipe, and the pre-limiting assembly limits the metal pipe; the surface of the fixed base is provided with an intermediate seat, the surface of the intermediate seat is provided with a movable block, the surface of the movable block is provided with a welding head, and the surface of the movable block is provided with a fixing assembly, and the fixing assembly fixes the welding head.

[0007] Preferably, the surface of the fixed seat is provided with an electromagnetic push rod, the electromagnetic push rod is in contact with the metal pipe, and the surface of the electromagnetic push rod in contact with the metal pipe is an arc surface, the surface of the electromagnetic push rod in contact with the metal pipe is provided with a protective pad, the electromagnetic push rod is provided with three groups, the three groups of electromagnetic push rods are distributed in a circumferential array about the center of the fixed seat, and the pre-limiting assembly includes a holding assembly and a shielding piece.

[0008] Preferably, the holding assembly includes a receiving groove, a supporting spring and a holding plate, the receiving groove is opened on the surface of the fixed seat, the receiving groove is in a square groove structure, the supporting spring is arranged on the surface of the receiving groove, the holding plate is arranged on the surface of the supporting spring, the holding plate is in a semicircular hollow structure, the holding plate is provided with three groups, the three groups of holding plates are distributed in a circumferential array about the center of the fixed seat, and the holding plate is in contact with the surface of the metal pipe.

[0009] Preferably, the shielding piece includes a movable rod, a elastic plate, a limiting plate, the surface of the fixed seat is provided with a plug-in hole, the movable rod is plug-in connected on the surface of the plug-in hole, the movable rod is in "T" shape column structure, the surface of the fixed seat is provided with a rotating groove, the surface of the rotating groove is rotatably connected with a rotating ring, the rotating ring is in "T" shape plate structure, the elastic plate is arranged on the surface of the movable rod, one end of the movable rod is fixed on the surface of the rotating ring, the limiting plate is in square plate structure, the limiting plate is arranged on the other side of the fixed seat and contacts with one end surface of the metal pipe, and the surface of the movable rod is provided with a clamping piece.

[0010] Preferably, the clamping piece includes a clamping block and a clamping groove, the clamping block is in square plate structure, the clamping block is arranged on the surface of the clamping groove, the clamping groove is arranged on the surface of the fixed seat, and the clamping groove is provided with two groups, the two groups of clamping grooves are distributed at ninety degrees about the center of the plug-in hole, and the fixed seat is provided with two groups, the two groups of fixed seats are symmetrically distributed about the center of the middle seat.

[0011] Preferably, the surface of the middle seat is provided with a movable groove, the movable groove is in annular groove structure with "T" shape cross section, the movable block is slidably connected on the surface of the movable groove, and the surface of the movable block is provided with a control panel.

[0012] Preferably, the fixed assembly includes a positioning frame, a positioning rod, an auxiliary plate and a clamping plate, the positioning frame is in "mouth" shape plate structure, the positioning rod is fixed on the surface of the positioning frame, the positioning rod is in circular column structure, the positioning rod is provided with four groups, the four groups of positioning rods are in "mouth" shape distribution, the auxiliary plate is hingedly connected on the surface of the positioning rod, the auxiliary plate is in square plate structure, the clamping plate is in square plate structure, the clamping plate is arranged on the surface of the auxiliary plate, a welding head is arranged between the four groups of clamping plates, the surface of the welding head is provided with a fixing groove, the fixing groove is in annular groove structure, one end of the clamping plate is arranged on the surface of the fixing groove, and the surface of the auxiliary plate is provided with a locking piece.

[0013] Preferably, the locking piece includes a hoop plate, a stop block and a pull rod, the hoop plate is in annular plate structure, the hoop plate is slidably connected on the surface of the four groups of auxiliary plates, the stop block is arranged on the surface of the two groups of auxiliary plates which are oppositely distributed, the stop block is in "L" shape plate structure, the pull rod is plug-in connected on the surface of the stop block, one end of the pull rod is plug-in connected in the hole on the surface of the auxiliary plate corresponding thereto, the pull rod is in "T" shape column structure, a spring is arranged between the pull rod and the stop block, the spring is sleeved on the surface of the pull rod, and the hoop plate is arranged between the surface of the stop block and the pull rod.

[0014] Preferably, the surface of the fixed base is provided with an electric box, the surface of the electric box is provided with a connecting wire, the surface of the fixed base is provided with a control panel, and the control panel is electrically connected with the electric box and the electromagnetic push rod through the wire.

[0015] A metal pipe welding equipment and a using method thereof, including the following steps:

[0016] The metal pipe fittings are placed on the surface of the fixing seat, three groups of top holding plates are in contact with the surface of the metal pipe fittings and top hold the metal pipe fittings, the limiting plate is rotated so that the clamping blocks on the surface of the limiting plate are located in the clamping grooves, and the limiting plate is in contact with one end of the metal pipe fittings, and the pre-limiting of the metal pipe fittings is completed;

[0017] At this time, three groups of electromagnetic push rods are started through the control panel to clamp and fix the metal pipe fittings, the metal pipe fittings cannot be easily displaced under the action of the top holding plates and the limiting plates, the metal pipe fittings are better clamped by the electromagnetic push rods, and the welding of the metal pipe fittings is more convenient;

[0018] When the limiting plate is rotated, the limiting plate drives the movable rod to rotate, the movable rod drives the elastic plates on the surface of the movable rod to rotate, and the movable block is rotated along the movable groove to weld the metal pipe fittings;

[0019] The clamping plate is located between the surface of the stop block and the surface of the pull rod, the clamping plate extrudes four groups of clamping plates so that one end of the clamping plates is located on the surface of the fixing groove, and the welding head can be fixed;

[0020] When the welding head needs to be replaced, one end of the pull rod is pulled to move the clamping plate out, the clamping plate can be separated from the surface of the fixing groove, the welding head can be taken down, the replacement is completed, and the overall use is more convenient.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] The metal pipe fitting welding equipment provided by the present application can prevent the metal pipe fittings from being displaced under the action of the top holding plates and the limiting plates, the metal pipe fittings are better clamped by the electromagnetic push rods, and the welding of the metal pipe fittings is more convenient; when the welding head needs to be replaced, one end of the pull rod is pulled to move the clamping plate out, the clamping plate can be separated from the surface of the fixing groove, the welding head can be taken down, the replacement is completed, and the overall use is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application is a structural schematic diagram;

[0024] Figure 2 The present application is a half-partial structural schematic diagram of the fixing seat;

[0025] Figure 3 The present application is a structural schematic diagram of the movable rod;

[0026] Figure 4 The present application is a structural schematic diagram of the fixing seat;

[0027] Figure 5 The present application is a structural schematic diagram of the fixing seat;

[0028] Figure 6 The present application is a half-partial structural schematic diagram of the intermediate seat;

[0029] Figure 7 It is the overall structure diagram of the positioning frame of the present application;

[0030] Figure 8 It is the overall structure diagram of the positioning frame of the present application;

[0031] In the figure: fixed base 1, fixed seat 2, electromagnetic push rod 3, storage groove 4, supporting spring 5, top-holding plate 6, metal pipe 7, plug-in hole 8, movable rod 9, rotating groove 10, rotating ring 11, elastic plate 12, limiting plate 13, clamping block 14, clamping groove 15, intermediate seat 16, movable groove 17, movable block 18, positioning frame 19, positioning rod 20, auxiliary plate 21, clamping plate 22, hoop plate 23, welding head 24, fixed groove 25, stop block 26, pull rod 27, control panel 28, electric box 29, connecting wire 30. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme of the present application clear, complete description, and the advantages are more clear and obvious, the following will be further described in detail with the help of the drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all the embodiments, only to explain the embodiments of the present application, and not for the purpose of limiting the embodiments of the present application, all other embodiments obtained by the ordinary skill in the art without doing creative work, belong to the scope of protection of the present application.

[0033] Embodiment one

[0034] Please refer to Figures 1-8 The present application provides a technical scheme: fixed base 1, the surface of fixed base 1 is provided with fixed seat 2, the surface of fixed seat 2 is provided with pre-limiting assembly, the surface of fixed seat 2 is overlapped with metal pipe 7, and the pre-limiting assembly limits the metal pipe 7; the surface of fixed base 1 is provided with intermediate seat 16, the surface of intermediate seat 16 is provided with movable block 18, the surface of movable block 18 is provided with welding head 24, and the surface of movable block 18 is provided with fixed assembly, which fixes the welding head 24;

[0035] Under the action of top-holding plate 6 and limiting plate 13, metal pipe 7 will not be easily displaced, so that metal pipe 7 is clamped better by electromagnetic push rod 3, which is more convenient for welding of metal pipe 7; when it is necessary to replace welding head 24, pull one end of pull rod 27 to move hoop plate 23 out, clamping plate 22 can be separated from the surface of fixed groove 25, welding head 24 can be removed, replacement is completed, and the whole use is more convenient.

[0036] Embodiment two

[0037] Refer to Figures 1 to 5On the basis of embodiment one, in order to make the metal pipe 7 not easy to appear displacement, the surface of the fixed seat 2 is provided with the electromagnetic push rod 3, the electromagnetic push rod 3 is in contact with the metal pipe 7 and the surface of the electromagnetic push rod 3 in contact with the metal pipe 7 is an arc surface, the surface of the electromagnetic push rod 3 in contact with the metal pipe 7 is provided with a protective pad, the electromagnetic push rod 3 is provided with three groups, the three groups of electromagnetic push rod 3 are distributed in a circular array about the center of the fixed seat 2, and the pre-limiting assembly includes a top-holding assembly and a shielding piece, the top-holding assembly includes a receiving groove 4, a supporting spring 5 and a top-holding plate 6, the receiving groove 4 is opened on the surface of the fixed seat 2, the receiving groove 4 is a square groove structure, the supporting spring 5 is arranged on the surface of the receiving groove 4, the top-holding plate 6 is arranged on the surface of the supporting spring 5, the top-holding plate 6 is a semicircular hollow structure, the top-holding plate 6 is provided with three groups, the three groups of top-holding plates 6 are distributed in a circular array about the center of the fixed seat 2, and the top-holding plate 6 is in contact with the surface of the metal pipe 7, the shielding piece includes a movable rod 9, a elastic plate 12 and a limiting plate 13, the surface of the fixed seat 2 is provided with a plug-in hole 8, the movable rod 9 is movably plugged into the surface of the plug-in hole 8, the movable rod 9 is a "T" shaped column structure, and the surface of the fixed seat 2 is provided with a rotating groove 10, the surface of the rotating groove 10 is rotatably connected with a rotating ring 11, the rotating ring 11 is a "T" shaped plate structure, the elastic plate 12 is arranged on the surface of the movable rod 9, and one end of the movable rod 9 is fixed to the surface of the rotating ring 11, the limiting plate 13 is a square plate structure, and the limiting plate 13 is in contact with one end surface of the metal pipe 7 on the other side of the fixed seat 2, and the surface of the movable rod 9 is provided with a clamping piece, the clamping piece includes a clamping block 14 and a clamping groove 15, the clamping block 14 is a square plate structure, the clamping block 14 is located on the surface of the clamping groove 15, the clamping groove 15 is arranged on the surface of the fixed seat 2, and the clamping groove 15 is provided with two groups, the two groups of clamping grooves 15 are distributed at ninety degrees about the center of the plug-in hole 8, and the fixed seat 2 is provided with two groups, the two groups of fixed seats 2 are symmetrically distributed about the center of the middle seat 16, the metal pipe 7 is placed on the surface of the fixed seat 2, the three groups of top-holding plates 6 are in contact with the surface of the metal pipe 7 and hold the metal pipe 7, the limiting plate 13 is rotated to make the clamping block 14 on the surface of the limiting plate 13 located in the clamping groove 15, and the limiting plate 13 is in contact with one end of the metal pipe 7, which pre-limits the metal pipe 7, at this time, the three groups of electromagnetic push rods 3 are started through the control panel 28 to clamp and fix the metal pipe 7, under the action of the top-holding plate 6 and the limiting plate 13, the metal pipe 7 will not easily displace, so that the metal pipe 7 is clamped better by the electromagnetic push rod 3, which is more convenient for welding the metal pipe 7; when the limiting plate 13 is rotated, the limiting plate 13 drives the movable rod 9 to rotate, the movable rod 9 drives the elastic plate 12 on the surface thereof to drive the rotating ring 11 to rotate; the movable block 18 is rotated along the movable groove 17 to weld the metal pipe 7.

[0038] Embodiment three

[0039] Refer to Figure 1 , Figures 6 to 8On the basis of embodiment two, in order to facilitate the replacement of the welding head 24, the surface of the intermediate seat 16 is provided with a movable groove 17, the movable groove 17 is a ring groove structure with a “T” shaped cross section, the movable block 18 is slidingly connected to the surface of the movable groove 17, and the surface of the movable block 18 is provided with a control panel 28, the fixing assembly includes a positioning frame 19, a positioning rod 20, an auxiliary plate 21, and a clamping plate 22, the positioning frame 19 is a “mouth” shaped plate structure, the positioning rod 20 is fixed to the surface of the positioning frame 19, the positioning rod 20 is a circular column structure, the positioning rod 20 is provided with four groups, the four groups of positioning rods 20 are distributed in a “mouth” shape, the auxiliary plate 21 is hinged to the surface of the positioning rod 20, the auxiliary plate 21 is a square plate structure, and the clamping plate 22 is a square plate structure, the clamping plate 22 is arranged on the surface of the auxiliary plate 21, and the welding head 24 is located between the four groups of clamping plates 22, the surface of the welding head 24 is provided with a fixing groove 25, the fixing groove 25 is a ring groove structure, and one end of the clamping plate 22 is located on the surface of the fixing groove 25, the surface of the auxiliary plate 21 is provided with a locking piece, the locking piece includes a hoop plate 23, a stop block 26, and a pull rod 27, the hoop plate 23 is an annular plate structure, the hoop plate 23 is slidingly connected to the surface of the four groups of auxiliary plates 21, the stop block 26 is arranged on the surfaces of the two groups of auxiliary plates 21 that are oppositely distributed, the stop block 26 is an “L” shaped plate structure, the pull rod 27 is inserted into the surface of the stop block 26, one end of the pull rod 27 is movably inserted into the corresponding hole in the surface of the auxiliary plate 21, the pull rod 27 is a “T” shaped column structure, a spring is arranged between the pull rod 27 and the stop block 26, the spring is sleeved on the surface of the pull rod 27, the hoop plate 23 is located between the surfaces of the stop block 26 and the pull rod 27, the surface of the fixed base 1 is provided with an electric box 29, the surface of the electric box 29 is provided with a connecting wire 30, the surface of the fixed base 1 is provided with a control panel 28, the control panel 28 is electrically connected to the electric box 29 and the electromagnetic push rod 3 through wires, the hoop plate 23 is located between the surfaces of the stop block 26 and the pull rod 27, the hoop plate 23 extrudes the four groups of clamping plates 22 so that one end of the clamping plates 22 is located on the surface of the fixing groove 25, thereby fixing the welding head 24, when it is necessary to replace the welding head 24, one end of the pull rod 27 is pulled to move the hoop plate 23 out, the clamping plate 22 can be separated from the surface of the fixing groove 25, the welding head 24 can be removed, the replacement is completed, and the overall use is more convenient.

[0040] Embodiment four

[0041] A metal pipe fitting welding device and a using method thereof, including the following steps:

[0042] The metal pipe fitting is placed on the surface of the fixed seat, the three groups of supporting plates are in contact with the surface of the metal pipe fitting and support the metal pipe fitting, the limiting plate is rotated so that the clamping block on the surface of the limiting plate is located in the clamping groove, and the limiting plate is in contact with one end of the metal pipe fitting, thereby completely limiting the metal pipe fitting;

[0043] At this time, the three sets of electromagnetic push rods are started by the control panel to clamp and fix the metal pipe, and under the action of the supporting plates and the limiting plates, the metal pipe will not be easily displaced, so that the metal pipe is clamped better by the electromagnetic push rods, and the welding of the metal pipe is more convenient.

[0044] When the limiting plate is rotated, the limiting plate drives the movable rod to rotate, the movable rod drives the elastic plates on the surface of the movable rod to drive the rotating ring to rotate, and the movable block is rotated along the movable groove to weld the metal pipe.

[0045] The clamping plate is located between the surface of the stop block and the pull rod, the clamping plate extrudes the four sets of clamping plates to make one end of the clamping plate located on the surface of the fixed groove, so that the welding head is fixed.

[0046] When the welding head needs to be replaced, the clamping plate is moved out by pulling one end of the pull rod, the clamping plate is separated from the surface of the fixed groove, the welding head is removed, and the replacement is completed.

[0047] In actual use, the metal pipe 7 is placed on the surface of the fixed seat 2, the three sets of supporting plates 6 are in contact with the surface of the metal pipe 7 and support the metal pipe 7, the limiting plate 13 is rotated to make the clamping block 14 on the surface of the limiting plate 13 located in the clamping groove 15, and the limiting plate 13 is in contact with one end of the metal pipe 7, the pre-limiting of the metal pipe 7 is completed, at this time, the three sets of electromagnetic push rods 3 are started by the control panel 28 to clamp and fix the metal pipe 7, under the action of the supporting plates 6 and the limiting plates 13, the metal pipe 7 will not be easily displaced, so that the metal pipe 7 is clamped better by the electromagnetic push rods 3, and the welding of the metal pipe 7 is more convenient; when the limiting plate 13 is rotated, the limiting plate 13 drives the movable rod 9 to rotate, the movable rod 9 drives the elastic plates 12 on the surface of the movable rod 9 to drive the rotating ring 11 to rotate, and the movable block 18 is rotated along the movable groove 17 to weld the metal pipe 7; the clamping plate 23 is located between the surface of the stop block 26 and the pull rod 27, the clamping plate 23 extrudes the four sets of clamping plates 22 to make one end of the clamping plate 23 located on the surface of the fixed groove 25, so that the welding head 24 is fixed, when the welding head 24 needs to be replaced, the clamping plate 23 is moved out by pulling one end of the pull rod 27, the clamping plate 22 is separated from the surface of the fixed groove 25, the welding head 24 is removed, and the replacement is completed, and the overall use is more convenient.

[0048] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A metal pipe fitting welding apparatus characterized by comprising: The metal pipe welding equipment comprises: The surface of the fixed base (1) is provided with a fixed seat (2), the surface of the fixed seat (2) is provided with a pre-limiting assembly, the surface of the fixed seat (2) is overlapped with a metal pipe (7), and the pre-limiting assembly limits the metal pipe (7); the surface of the fixed base (1) is provided with an intermediate seat (16), the surface of the intermediate seat (16) is provided with a movable block (18), the surface of the movable block (18) is provided with a welding head (24), and the surface of the movable block (18) is provided with a fixing assembly for fixing the welding head (24); the surface of the fixed seat (2) is provided with an electromagnetic push rod (3), the electromagnetic push rod (3) is in contact with the metal pipe (7), the surface of the electromagnetic push rod (3) in contact with the metal pipe (7) is an arc surface, the surface of the electromagnetic push rod (3) in contact with the metal pipe (7) is provided with a protective pad, the electromagnetic push rod (3) is provided with three groups, the three groups of electromagnetic push rods (3) are distributed in a circumferential array about the center of the fixed seat (2), and the pre-limiting assembly comprises a supporting assembly and a shielding piece; the shielding piece comprises a movable rod (9), a elastic plate (12) and a limiting plate (13), the surface of the fixed seat (2) is provided with a plug-in hole (8), the movable rod (9) is movably plugged into the surface of the plug-in hole (8), the movable rod (9) is in a "T" shaped column structure, the surface of the fixed seat (2) is provided with a rotating groove (10), the surface of the rotating groove (10) is rotatably connected with a rotating ring (11), the rotating ring (11) is in a "T" shaped plate structure, the elastic plate (12) is arranged on the surface of the movable rod (9), one end of the movable rod (9) is fixed to the surface of the rotating ring (11), the limiting plate (13) is in a square plate structure, the limiting plate (13) is located on the other side of the fixed seat (2) and in contact with one end surface of the metal pipe (7), and the surface of the movable rod (9) is provided with a clamping piece.

2. A metal pipe welding apparatus according to claim 1, characterized by: The supporting assembly comprises a receiving groove (4), a supporting spring (5) and a supporting plate (6), the receiving groove (4) is arranged on the surface of the fixed seat (2) and is in a square groove structure, the supporting spring (5) is arranged on the surface of the receiving groove (4), the supporting plate (6) is arranged on the surface of the supporting spring (5) and is in a semicircular hollow structure, the supporting plate (6) is provided with three groups, the three groups of supporting plates (6) are distributed in a circumferential array about the center of the fixed seat (2), and the supporting plate (6) is in contact with the surface of the metal pipe (7).

3. A metal pipe welding apparatus according to claim 2, wherein: The clamping piece comprises a clamping block (14) and a clamping groove (15), the clamping block (14) is in a square plate structure, the clamping block (14) is arranged on the surface of the clamping groove (15), the clamping groove (15) is arranged on the surface of the fixed seat (2), and the clamping groove (15) is provided with two groups, the two groups of clamping grooves (15) are distributed at an angle of 90 degrees about the center of the plug-in hole (8), and the fixed seat (2) is provided with two groups, the two groups of fixed seats (2) are symmetrically distributed about the center of the intermediate seat (16).

4. A metal pipe welding apparatus according to claim 3, wherein: The surface of the intermediate seat (16) is provided with a movable groove (17), the movable groove (17) is an annular groove body structure with a "T" shaped cross section, and the movable block (18) is slidably connected to the surface of the movable groove (17).

5. A metal pipe welding apparatus according to claim 4, wherein: The fixing assembly comprises a positioning frame (19), positioning rods (20), auxiliary plates (21), clamping plates (22), the positioning frame (19) is in the shape of a "mouth" plate structure, the positioning rods (20) are fixed on the surface of the positioning frame (19), the positioning rods (20) are in the shape of a circular column structure, four groups of the positioning rods (20) are distributed in the shape of a "mouth", the auxiliary plates (21) are hingedly connected to the surface of the positioning rods (20), the auxiliary plates (21) are in the shape of a square plate structure, the clamping plates (22) are in the shape of a square plate structure, the clamping plates (22) are arranged on the surface of the auxiliary plates (21), the welding heads (24) are arranged between the four groups of clamping plates (22), the surface of the welding head (24) is provided with a fixing groove (25), the fixing groove (25) is in the shape of an annular groove structure, one end of the clamping plate (22) is located on the surface of the fixing groove (25), and the surface of the auxiliary plate (21) is provided with a locking piece.

6. A metal pipe welding apparatus according to claim 5, wherein: The locking piece comprises a hoop plate (23), a stop block (26) and a pull rod (27), the hoop plate (23) is in the shape of an annular plate structure, the hoop plate (23) is slidingly connected to the surface of the four groups of auxiliary plates (21), the stop block (26) is arranged on the surface of the two groups of auxiliary plates (21) that are oppositely distributed, the stop block (26) is in the shape of an "L" plate structure, the pull rod (27) is inserted into the surface of the stop block (26), one end of the pull rod (27) is movably inserted into the corresponding hole in the surface of the auxiliary plate (21), the pull rod (27) is in the shape of a "T" column structure, a spring is arranged between the pull rod (27) and the stop block (26), the spring is sleeved on the surface of the pull rod (27), and the hoop plate (23) is located between the surfaces of the stop block (26) and the pull rod (27).

7. A metal pipe welding apparatus according to claim 6, wherein: The surface of the fixing base (1) is provided with an electric box (29), the surface of the electric box (29) is provided with a connecting wire (30), the surface of the fixing base (1) is provided with a control panel (28), and the control panel (28) is electrically connected with the electric box (29) and the electromagnetic push rod (3) through wires.

8. A method of using a metal pipe welding apparatus as claimed in claim 7, characterized in that: The method for using the metal pipe welding device comprises the following steps: The metal pipe is placed on the surface of the fixing base, the three groups of supporting plates are in contact with the surface of the metal pipe and support the metal pipe, the clamping block on the surface of the limiting plate is located in the clamping groove by rotating the limiting plate, and the limiting plate is in contact with one end of the metal pipe, so that the metal pipe is pre-positioned; Then, the three groups of electromagnetic push rods are started through the control panel to clamp and fix the metal pipe, the metal pipe cannot be easily displaced under the action of the supporting plates and the limiting plate, the metal pipe is better clamped by the electromagnetic push rod, and the welding of the metal pipe is more convenient; When the limiting plate is rotated, the limiting plate drives the movable rod to rotate, the movable rod drives the elastic plate on the surface of the movable rod to drive the rotating ring to rotate, and the movable block is rotated along the movable groove to weld the metal pipe; The hoop plate is located between the surfaces of the stop block and the pull rod, the hoop plate extrudes the four groups of clamping plates so that one end of the clamping plates is located on the surface of the fixing groove, and the welding head is fixed; When the welding head needs to be replaced, one end of the pull rod is pulled to move the hoop plate out, the clamping plate can be separated from the surface of the fixing groove, the welding head can be taken off, the replacement is completed, and the whole use is more convenient.

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