Steel cylinder permeation welding device

Abstract

The invention provides a steel cylinder permeation welding device, and relates to the technical field of steel cylinder welding, the steel cylinder permeation welding device comprises a welding clamping piece, and the welding clamping piece is provided with two clamping sleeving pieces; the two clamping and sleeving parts are used for sleeving and clamping a steel cylinder; two welding seam limiting pieces are mounted on the welding clamping piece; the two welding seam limiting pieces are used for limiting a steel cylinder welding seam; a magnetic suction welding part is mounted on the welding clamping piece; the magnetic suction welding part is used for welding a formed steel cylinder; according to the steel cylinder welding device, the welding permeation effect can be improved through negative pressure, the welding connection strength of steel cylinder gaps is improved, meanwhile, overflowed melt can be cleaned, the forming quality can be improved, welding is more stable, and the problems that according to an existing steel cylinder welding device, the welding permeation effect cannot be conveniently improved, and gaps cannot be conveniently filled with welding melt are solved.

Description

Technical Field

[0001] The invention relates to the technical field of steel cylinder welding, in particular to a steel cylinder penetration welding device. Background Art

[0002] In the actual production and manufacturing of steel cylinders, for example, gas cylinders such as liquefied natural gas are mostly processed by welding. Because they are high-pressure containers, especially for larger steel cylinders, the welding quality directly affects the pressure resistance of the steel cylinder. A steel cylinder usually uses two bowl-shaped bottle bodies to be inserted and welded, and an inner shrinkage is set in one of the bowl-shaped bottle bodies to facilitate the socketing. At present, steel cylinders are mostly welded by automatic welding machines, which are widely used due to their high efficiency and other advantages. However, the current steel cylinder welding device is not convenient for increasing the welding penetration effect. There is a normal tolerance between the two bowl-shaped bottle bodies, and gaps are prone to exist at the socket, which is not convenient for filling with welding molten material, increasing the risk of leakage in the later stage. At the same time, it is also not convenient to clean the inside of the bottle body after welding, and it is easy to leave overflowed molten material, which is not convenient for welding positioning. It relies on pre-spot welding positioning, and the weld accuracy is poor. It is also easy to cause the two bowl-shaped bottle bodies to be eccentric. Summary of the invention

[0003] The disclosed embodiment relates to a steel cylinder penetration welding device, wherein the suction piece can utilize negative pressure to increase the welding penetration effect and increase the welding connection strength of the steel cylinder gap. Meanwhile, the overflowed molten material can be cleaned, thereby improving the molding quality and making the welding more stable. This solves the problem that the current steel cylinder welding device is not convenient for increasing the welding penetration effect and for filling the gap with the welding molten material.

[0004] In the first aspect of the present disclosure, a cylinder penetration welding device is provided, including a welding clamp, on which two clamping sleeves are installed; the two clamping sleeves are used to sleeve and clamp the cylinder; two weld limiters are installed on the welding clamp; the two weld limiters are used to limit the weld of the cylinder; a magnetic welding part is installed on the welding clamp; the magnetic welding part is used to weld and form the cylinder; an inner wall fitting is fixedly installed on the right clamping sleeve; an overflow cleaning part is installed on the inner wall fitting; the overflow cleaning part is used to frictionally clean the inner side of the cylinder; a suction part is installed on the welding clamp; the suction part is used to promote welding penetration; the welding clamp includes: a welding mounting seat, a counter screw and a driving motor, the welding mounting seat is rotatably installed with a counter screw, and reverse threads are provided on both sides of the counter screw; the driving motor is fixedly installed on the side of the welding mounting seat; the output shaft of the driving motor is fixedly installed with a counter screw.

[0005] In at least some embodiments, the magnetic welding part further includes: an electromagnet, on the output shaft of the welding hydraulic cylinder, an electromagnet is rotatably mounted via a bracket, and the electromagnet is used for rolling and fitting the cylinder.

[0006] In at least some embodiments, the magnetic welding part includes: a welding mounting arm, a welding hydraulic cylinder and a welding gun head, wherein the welding mounting arm is fixedly mounted on the side of the welding mounting seat; a welding hydraulic cylinder is fixedly mounted on the welding mounting arm; the output shaft of the welding hydraulic cylinder passes through the welding mounting arm; a welding gun head is fixedly mounted on the output shaft end of the welding hydraulic cylinder; and the welding gun head is aligned with the weld of the cylinder.

[0007] In at least some embodiments, the welding clamp further includes: a rotating mounting seat and a driving hydraulic cylinder, wherein two rotating mounting seats are fixedly mounted on the welding mounting seat by bolts; driving hydraulic cylinders are respectively fixedly mounted on the two rotating mounting seats, and the output shafts of the two driving hydraulic cylinders pass through the rotating mounting seats.

[0008] In at least some embodiments, the inner wall fitting includes: a sleeve mounting seat, a rotating mounting column, a rotating arm and a limiting ring, the sleeve mounting seat is fixedly mounted on the welding positioning frame on the right; a rotating mounting column is rotatably sleeved on the sleeve mounting seat; a rotating arm is rotatably mounted on the rotating mounting column; the limiting ring is fixedly mounted on the welding positioning frame on the right; the limiting ring is used to fit and close the valve hole of the cylinder.

[0009] In at least some embodiments, the clamping sleeve includes: a rotary motor, a welding positioning frame and positioning bolts. There are two rotary motors, and the two rotary motors are respectively fixedly mounted on the output shafts of the two driving hydraulic cylinders; welding positioning frames are fixedly mounted on the output shafts of the two rotary motors; a circle of through holes is provided on the side of the right welding positioning frame; the right welding positioning frame is used to dock with the valve hole end of the cylinder; three positioning bolts are respectively threaded on the two welding positioning frames.

[0010] In at least some embodiments, the overflow cleaning member includes: a cleaning motor and a cleaning grinding wheel, wherein the cleaning motor is fixedly mounted on a mounting arm; a cleaning grinding wheel is fixedly mounted on an output shaft of the cleaning motor; and the cleaning grinding wheel is used for frictionally cleaning the inside of the cylinder.

[0011] In at least some embodiments, the suction component includes: a suction vacuum pump and a suction auxiliary cover, the suction vacuum pump is fixedly mounted on a welding mounting base; a suction auxiliary cover is mounted on the suction vacuum pump; the suction auxiliary cover is fixedly mounted on a welding positioning frame on the right; a circle of through holes on the welding positioning frame is located on the inner side of the suction auxiliary cover; the suction vacuum pump is used to increase the welding penetration effect at the gap of the cylinder.

[0012] In at least some embodiments, the inner wall fitting also includes: a mounting arm and a magnet adsorption wheel, the mounting arm is rotatably mounted on the rotating arm; a magnet adsorption wheel is rotatably mounted on the mounting arm; the magnet adsorption wheel is used to magnetically attract the electromagnet; the magnet adsorption wheel is a magnet; the magnet adsorption wheel rolls and fits against the inner wall of the cylinder.

[0013] In at least some embodiments, the weld limiting member includes: a limiting clamping block, a retracting mounting shaft, a limiting arm and a limiting plate; the limiting clamping block is slidably mounted on the welding mounting seat, and the retracting mounting shaft is fixedly mounted on the limiting clamping block; a spring is sleeved on the retracting mounting shaft; the limiting arm is slidably mounted on the limiting clamping block; the retracting mounting shaft is inserted on the limiting arm; the limiting arm is rotatably mounted on the limiting plate; the limiting plate is used to limit the weld.

[0014] The present invention provides a steel cylinder penetration welding device, which has the following beneficial effects:

[0015] The present invention adopts a magnetic welding part to ensure the welding penetration effect, especially for steel cylinders with larger volumes. The suction force generated by negative pressure is used to compensate for the gap between the two bowl-shaped bottle bodies at the insertion position, thereby improving the welding firmness. The shrinkage processing accuracy requirements for the bowl-shaped bottle body are lower, which can reduce the hidden dangers of leakage caused by the weak gap, and is more practical.

[0016] In addition, the overflow cleaning piece is used in conjunction with the inner wall fitting piece, so that during the operation of the structure, as welding proceeds, if there is overflow when the weld is accelerated by negative pressure, the overflow impurities can be cleaned by friction, thereby improving the smoothness of the interior of the cylinder.

[0017] In addition, the use of weld limiters can facilitate workers to accurately reserve welds when welding steel cylinders, avoiding the need for traditional welding machines to clamp two bowl-shaped bottle bodies inward, which results in the steel cylinder welds being too tight, poor welding effects, and large weld protrusions after welding, thereby improving welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 A schematic diagram showing a steel cylinder after being installed on a steel cylinder penetration welding device of the present application is shown;

[0022] Figure 2 A cross-sectional view showing the internal structure of the present application;

[0023] Figure 3 A schematic diagram showing the installation position of the inner wall fitting of the present application is shown;

[0024] Figure 4 A schematic diagram showing the welding clamp structure of the present application is shown;

[0025] Figure 5 A schematic diagram showing the structure of the clamping sleeve connector of the present application is shown;

[0026] Figure 6 This application shows Figure 4 A magnified view of the structure of the middle E region;

[0027] Figure 7 A schematic diagram showing the structure of the magnetic welding part of the present application is shown;

[0028] Figure 8 A schematic diagram showing the structure of the inner wall fitting of the present application is shown;

[0029] Fig. 9 This application shows Figure 8 A magnified view of the structure of the middle F region;

[0030] Fig.10 A schematic diagram showing the structure of the suction piece of the present application is shown;

[0031] Fig.11 This application shows Figure 2 A magnified view of the structure of the middle G region;

[0032] Fig.12 A schematic diagram of the cleaning position of the overflow cleaning piece of the present application is shown.

[0033] List of reference numerals:

[0034] 1. Welding clamp; 101. Welding mounting seat; 1011. Opposite screw rod; 1012. Driving motor; 102. Rotating mounting seat; 103. Driving hydraulic cylinder; 2. Clamping sleeve; 201. Rotating motor; 202. Welding positioning frame; 203. Positioning bolt; 3. Welding seam limiter; 301. Limiting clamping block; 302. Retracting mounting shaft; 303. Limiting arm; 304. Limiting sheet; 4. Magnetic welding part; 40 1. Welding mounting arm; 402. Welding hydraulic cylinder; 403. Welding gun head; 404. Electromagnet; 5. Inner wall fitting; 501. Sleeve mounting seat; 502. Rotating mounting column; 503. Rotating arm; 504. Limiting ring; 505. Mounting arm; 506. Magnetic adsorption wheel; 6. Overflow cleaning part; 601. Cleaning motor; 602. Cleaning grinding wheel; 7. Suction part; 701. Suction vacuum pump; 702. Suction auxiliary cover. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1 to 12 :

[0037] The present invention proposes a steel cylinder penetration welding device, comprising a welding clamp 1, on which two clamping sleeves 2 are installed; the two clamping sleeves 2 are used to sleeve and clamp the steel cylinder; the welding clamp 1 is equipped with two weld stoppers 3; the two weld stoppers 3 are used to limit the weld of the steel cylinder; the welding clamp 1 is equipped with a magnetic welding part 4; the magnetic welding part 4 is used to weld and form the steel cylinder; an inner wall fitting part 5 is fixedly installed on the right clamping sleeve 2; the inner wall fitting part 5 is equipped with an overflow cleaning part 6; the overflow The cleaning member 6 is used for friction cleaning of the inner side of the cylinder; a suction member 7 is installed on the welding clamp 1; the suction member 7 is used to promote welding penetration; the welding clamp 1 comprises: a welding mounting seat 101, an opposing screw rod 1011 and a driving motor 1012, the opposing screw rod 1011 is rotatably installed on the welding mounting seat 101, and reverse threads are provided on both sides of the opposing screw rod 1011; the driving motor 1012 is fixedly installed on the side of the welding mounting seat 101; the opposing screw rod 1011 is fixedly installed on the output shaft of the driving motor 1012.

[0038] In the embodiment of the present disclosure, the welding clamp 1 also includes: a rotating mounting seat 102 and a driving hydraulic cylinder 103. Two rotating mounting seats 102 are fixedly installed on the welding mounting seat 101 by bolts; the driving hydraulic cylinders 103 are fixedly installed on the two rotating mounting seats 102, and the output shafts of the two driving hydraulic cylinders 103 pass through the rotating mounting seat 102; the clamping sleeve 2 includes: a rotary motor 201, a welding positioning frame 202 and a positioning bolt 203. There are two rotary motors 201, and the two rotary motors 201 are fixedly installed on the output shafts of the two driving hydraulic cylinders 103 respectively; the welding positioning frame 202 is fixedly installed on the output shafts of the two rotary motors 201; a circle of through holes is provided on the side of the right welding positioning frame 202; the right welding positioning frame 202 is used to dock the valve hole end of the cylinder; three positioning bolts 203 are respectively threaded on the two welding positioning frames 202; the weld limiter 3 includes: a limit clamping block 301, a retractable mounting shaft 302, a limit arm 303 The welding mounting seat 101 is provided with a limited clamping block 301 which is slidably mounted thereon, and a retracting mounting shaft 302 is fixedly mounted thereon; a spring is sleeved on the retracting mounting shaft 302; a limited arm 303 is slidably mounted thereon the limited clamping block 301; the retracting mounting shaft 302 is plugged into the limited arm 303; a limited plate 304 is rotatably mounted on the limited arm 303; the limited plate 304 is used to limit the weld, and the weld limiter 3 is used to facilitate the staff to carry out the welding. The weld seam is accurately reserved when welding the steel cylinder, so as to avoid the problem that the two bowl-shaped bottle bodies need to be clamped inwards during welding with a traditional welding machine, which causes the weld seam of the steel cylinder to be too tight and the welding effect is poor. The weld path protrusion after welding is relatively large. The method of using the limit plate 304 for weld seam adaptation can automatically adapt to ensure the welding quality, and there is no need to spot weld and position the bowl-shaped bottle body in advance, thereby ensuring the welding efficiency. The structure is simple and reasonable, and the clamping sleeve 2 can be used for clamping and positioning to ensure that the two bowl-shaped bottle bodies are stably welded.

[0039] In the embodiment of the present disclosure, the magnetic welding part 4 includes: a welding mounting arm 401, a welding hydraulic cylinder 402 and a welding gun head 403. The welding mounting arm 401 is fixedly mounted on the side of the welding mounting seat 101; the welding hydraulic cylinder 402 is fixedly mounted on the welding mounting arm 401; the output shaft of the welding hydraulic cylinder 402 passes through the welding mounting arm 401; the welding gun head 403 is fixedly mounted on the output shaft end of the welding hydraulic cylinder 402; the welding gun head 403 is aligned with the weld of the steel cylinder; the magnetic welding part 4 also includes: an electromagnet 404, and an electromagnet 404 is rotatably mounted on the output shaft of the welding hydraulic cylinder 402 through a bracket 04, and the electromagnet 404 is used for rolling and fitting the steel cylinder; the suction part 7 includes: a suction vacuum pump 701 and a suction auxiliary cover 702, the suction vacuum pump 701 is fixedly mounted on the welding mounting seat 101; the suction vacuum pump 701 is mounted with a suction auxiliary cover 702; the suction auxiliary cover 702 is fixedly mounted on the welding positioning frame 202 on the right; a circle of through holes on the welding positioning frame 202 is located on the inner side of the suction auxiliary cover 702; the suction vacuum pump 701 is used to increase the welding penetration effect at the gap of the steel cylinder, and the magnetic welding part 4 is used to ensure the welding penetration effect, especially for larger volumes. Cylinder, this structure can use the suction force generated by negative pressure to perform penetration compensation for the gap between the two bowl-shaped bottle bodies at the insertion position, thereby improving the firmness of welding, and has lower requirements for the shrinkage processing accuracy of the bowl-shaped bottle body, which can reduce the hidden dangers of leakage caused by the relatively weak gap, and is more practical. The high-temperature molten material in the welding process is used to perform penetration compensation under the action of negative pressure, and the integrity of the weld is better after cooling. The bowl-shaped bottle body with a valve hole is placed in the welding positioning frame 202 on the right, and the limiting ring 504 is sleeved and fitted for sealing, and the welding gun head 403 is driven downward by the welding hydraulic cylinder 402 , align with the weld of the steel cylinder, then start the welding gun head 403 to weld the weld, as the steel cylinder rotates, welding work can be carried out at this time, start the suction force generated by the suction vacuum pump 701, and use the suction auxiliary cover 702 to connect the steel cylinder to achieve negative pressure suction, and the gap between the mutually nested bowl-shaped bottle bodies can promote the molten material produced by penetration welding after being subjected to negative pressure, thereby increasing the integrity, and as the steel cylinder rotates, the weld path cooled after welding can squeeze the limiting plate 304, and the limiting plate 304 will be compressed to compress the spring on the retracting mounting shaft 302 to achieve outward expansion without affecting the rotation welding of the steel cylinder.

[0040] In the embodiment of the present disclosure, the inner wall fitting part 5 includes: a sleeve mounting seat 501, a rotating mounting column 502, a rotating arm 503 and a limiting ring 504. The sleeve mounting seat 501 is fixedly mounted on the welding positioning frame 202 on the right; a rotating mounting column 502 is rotatably sleeved on the sleeve mounting seat 501; a rotating arm 503 is rotatably mounted on the rotating mounting column 502; a limiting ring 504 is fixedly mounted on the welding positioning frame 202 on the right; the limiting ring 504 is used to fit the closed cylinder valve hole; the inner wall fitting part 5 also includes: a mounting arm 505 and a magnet adsorption wheel 506, the mounting arm 505 is rotatably mounted on the rotating arm 503; the mounting A magnet adsorption wheel 506 is rotatably mounted on the arm 505; the magnet adsorption wheel 506 is used to magnetically attract the electromagnet 404; the magnet adsorption wheel 506 is a magnet; the magnet adsorption wheel 506 rolls and fits against the inner wall of the cylinder; the inner wall fitting 5 can cooperate with the electromagnet 404 to perform magnetic attraction and positioning, which can improve the welding stability, and utilize the magnetic attraction force to improve the coaxial accuracy of the welding of this structure, and the structure is simpler and more reasonable. During the welding process of the welding gun head 403, the electromagnet 404 electromagnetically attracts the outside of the cylinder, and the electromagnet 404 can magnetically locate the weld to prevent the weld from deforming downward under the action of gravity, thereby playing a role of magnetic attraction support.

[0041] Embodiment 2, on the basis of embodiment 1, the overflow cleaning member 6 comprises: a cleaning motor 601 and a cleaning grinding wheel 602, the cleaning motor 601 is fixedly mounted on the mounting arm 505; a cleaning grinding wheel 602 is fixedly mounted on the output shaft of the cleaning motor 601; the cleaning grinding wheel 602 is used to frictionally clean the inside of the cylinder, and the overflow cleaning member 6 is used in conjunction with the inner wall fitting member 5, so that during the operation of the structure, as the welding proceeds, if there is overflow when the weld is accelerated by negative pressure penetration, the overflow impurities can be frictionally cleaned, so that the smooth effect of the inside of the cylinder can be improved, the structure is simple and reasonable, and the molding quality of the structure is improved, and at the same time, the structure cooperates with the magnet to absorb The support and guidance of the auxiliary wheel 506 will not cause excessive wear to the inner wall of the cylinder, and the friction cleaning accuracy is higher. When the magnet adsorption wheel 506 is magnetically attracted and guided by the electromagnet 404 and rolls around the inside of the cylinder, the cleaning grinding wheel 602 fits the inside of the bowl-shaped bottle body with the valve hole, and the side of the cleaning grinding wheel 602 is located at the end of the shrinkage of the bowl-shaped bottle body. Once the molten material overflows, the cleaning motor 601 can be used to drive the cleaning grinding wheel 602 to rotate, and the cleaning grinding wheel 602 can be used to rub the overflow. The magnet adsorption wheel 506 can roll and fit the inside of the cylinder for limiting, preventing the cleaning grinding wheel 602 from excessively squeezing and fitting the inside of the cylinder and causing excessive wear.

[0042] The working principle of this embodiment is as follows: first, place this structure on the ground, insert two bowl-shaped bottle bodies for making steel cylinders into two welding positioning frames 202 respectively, and two driving hydraulic cylinders 103 drive the two welding positioning frames 202 to move inward to control the insertion of the two bowl-shaped bottle bodies. At this time, start the driving motor 1012 to drive the opposite screw rod 1011 to rotate, and control the limiting piece 304 on the limiting clamping block 301 to fit on the side of the bowl-shaped bottle body with a shrinkage, and limit the inserted bowl-shaped bottle body at intervals to ensure that the weld meets the standard, tighten each positioning bolt 203 for positioning, and as the rotary motor 201 drives the welding positioning frame 202 to rotate, rotary welding can be carried out. When installing the bowl-shaped bottle body with a valve hole on the right welding positioning frame 202, the magnet adsorption wheel 506 magnetically attracts the electromagnet 404 for positioning, and the bowl-shaped bottle body with the valve hole is placed in the welding positioning frame 202 on the right, and the limiting ring 504 is fitted to seal, and the limiting ring 504 can be To seal, the welding gun head 403 is driven downward by the welding hydraulic cylinder 402 to align the weld seam of the steel cylinder. At this time, the welding gun head 403 is started to weld the weld seam. As the steel cylinder rotates, welding work can be carried out at this time, and the suction force generated by the suction vacuum pump 701 is started. The steel cylinder can be connected to realize negative pressure suction by using the suction auxiliary cover 702. The gap between the bowl-shaped bottles that are mutually sleeved can promote the molten material produced by penetration welding after being subjected to negative pressure; the magnet adsorption wheel 506 is magnetically pressed and pressed against the inner side of the bowl-shaped bottle body shrinkage by the electromagnet 404 to make the welding more stable. During the welding process of the welding gun head 403, the electromagnet 404 is connected to the outer side of the electromagnetic suction steel cylinder. The electromagnet 404 can magnetically position the weld seam to prevent the weld seam from deforming downward under the action of gravity, thereby playing the role of magnetic support; the cleaning grinding wheel 602 is attached to the inner side of the bowl-shaped bottle body with a valve hole, and the side of the cleaning grinding wheel 602 is located at the end of the bowl-shaped bottle body shrinkage, as shown in the attached Fig.12 As shown, once the molten material overflows, the cleaning grinding wheel 602 can be driven to rotate by the cleaning motor 601, and the cleaning grinding wheel 602 can be used to rub the overflowed material. The electromagnet 404 magnetically attracts and drives the magnet adsorption wheel 506 to move. The magnet adsorption wheel 506 can be rolled and fitted to the inside of the cylinder for limiting, so as to prevent the cleaning grinding wheel 602 from excessively squeezing and fitting the inside of the cylinder to cause excessive wear. With the completion of welding, the positioning bolt 203 is loosened under the drive of the driving hydraulic cylinder 103, and the two welding positioning frames 202 are separated. The rotating arm 503 and the overflow cleaning member 6 can be pulled out from the preset valve hole of the bowl-shaped bottle body after welding, and the valve hole of the cylinder itself is used to improve the processing effect of the inside of the bottle body.

[0043] In this article, there are a few points to note:

[0044] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0045] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0046] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A steel cylinder penetration welding device, comprising a welding clamp (1), on which two clamping sleeves (2) are mounted; characterized in that: The two clamping sleeves (2) are used to sleeve and clamp the steel cylinder; Two weld stoppers (3) are installed on the welding clamp (1); the two weld stoppers (3) are used to stop the weld of the steel cylinder; The welding clamp (1) is provided with a magnetic welding portion (4); the magnetic welding portion (4) is used for welding and forming a steel cylinder; An inner wall fitting part (5) is fixedly mounted on the clamping sleeve part (2) on the right side; an overflow cleaning part (6) is mounted on the inner wall fitting part (5); the overflow cleaning part (6) is used for frictionally cleaning the inner side of the cylinder; A suction piece (7) is installed on the welding clamp (1); the suction piece (7) is used to promote welding penetration; The welding clamp (1) comprises: a welding mounting seat (101), an opposing screw rod (1011) and a driving motor (1012); the opposing screw rod (1011) is rotatably mounted on the welding mounting seat (101), and opposite threads are provided on both sides of the opposing screw rod (1011); the driving motor (1012) is fixedly mounted on a side surface of the welding mounting seat (101); and the opposing screw rod (1011) is fixedly mounted on an output shaft of the driving motor (1012).

2. A steel cylinder penetration welding device according to claim 1, characterized in that: The welding clamp (1) further comprises: a rotating mounting seat (102) and a driving hydraulic cylinder (103); two rotating mounting seats (102) are fixedly mounted on the welding mounting seat (101) by means of bolts; the driving hydraulic cylinders (103) are respectively fixedly mounted on the two rotating mounting seats (102), and the output shafts of the two driving hydraulic cylinders (103) pass through the rotating mounting seats (102).

3. A steel cylinder penetration welding device according to claim 2, characterized in that: The clamping sleeve (2) comprises: a rotary motor (201), a welding positioning frame (202) and positioning bolts (203); two rotary motors (201) are provided, and the two rotary motors (201) are respectively fixedly mounted on the output shafts of the two driving hydraulic cylinders (103); the welding positioning frames (202) are fixedly mounted on the output shafts of the two rotary motors (201); a circle of through holes is provided on the side of the right welding positioning frame (202); the right welding positioning frame (202) is used to connect with the valve hole end of the cylinder; and three positioning bolts (203) are respectively threadedly connected to the two welding positioning frames (202).

4. A steel cylinder penetration welding device according to claim 1, characterized in that: The weld limiter (3) comprises: a limit clamping block (301), a retractable installation shaft (302), a limit arm (303) and a limit plate (304); the limit clamping block (301) is slidably installed on the welding mounting seat (101), and the retractable installation shaft (302) is fixedly installed on the limit clamping block (301); a spring is sleeved on the retractable installation shaft (302); the limit arm (303) is slidably installed on the limit clamping block (301); the retractable installation shaft (302) is plugged into the limit arm (303); the limit plate (304) is rotatably installed on the limit arm (303); the limit plate (304) is used for limiting the weld.

5. A steel cylinder penetration welding device according to claim 3, characterized in that: The magnetic welding part (4) comprises: a welding mounting arm (401), a welding hydraulic cylinder (402) and a welding gun head (403); the welding mounting arm (401) is fixedly mounted on the side of the welding mounting seat (101); the welding hydraulic cylinder (402) is fixedly mounted on the welding mounting arm (401); the output shaft of the welding hydraulic cylinder (402) passes through the welding mounting arm (401); the welding gun head (403) is fixedly mounted on the output shaft end of the welding hydraulic cylinder (402); the welding gun head (403) is aligned with the weld of the steel cylinder.

6. A steel cylinder penetration welding device according to claim 5, characterized in that: The magnetic attraction welding part (4) further comprises: an electromagnet (404), on which the output shaft of the welding hydraulic cylinder (402) is rotatably mounted via a bracket, and the electromagnet (404) is used for rolling and fitting the steel cylinder.

7. A steel cylinder penetration welding device according to claim 6, characterized in that: The inner wall fitting part (5) comprises: a sleeve mounting seat (501), a rotating mounting column (502), a rotating arm (503) and a limiting ring (504); the sleeve mounting seat (501) is fixedly mounted on the welding positioning frame (202) on the right side; the rotating mounting column (502) is rotatably sleeved on the sleeve mounting seat (501); the rotating arm (503) is rotatably mounted on the rotating mounting column (502); the limiting ring (504) is fixedly mounted on the welding positioning frame (202) on the right side; the limiting ring (504) is used for fitting and closing the valve hole of the cylinder.

8. A steel cylinder penetration welding device according to claim 7, characterized in that: The inner wall fitting member (5) further comprises: a mounting arm (505) and a magnet adsorption wheel (506); the mounting arm (505) is rotatably mounted on the rotating arm (503); a magnet adsorption wheel (506) is rotatably mounted on the mounting arm (505); the magnet adsorption wheel (506) is used for magnetically attracting the electromagnet (404); the magnet adsorption wheel (506) is a magnet; the magnet adsorption wheel (506) rolls and fits on the inner wall of the cylinder.

9. A steel cylinder penetration welding device according to claim 8, characterized in that: The overflow cleaning member (6) comprises: a cleaning motor (601) and a cleaning grinding wheel (602); the cleaning motor (601) is fixedly mounted on the mounting arm (505); the cleaning grinding wheel (602) is fixedly mounted on the output shaft of the cleaning motor (601); the cleaning grinding wheel (602) is used for frictionally cleaning the inside of the cylinder.

10. A steel cylinder penetration welding device according to claim 3, characterized in that: The suction component (7) comprises: a suction vacuum pump (701) and a suction auxiliary cover (702); the suction vacuum pump (701) is fixedly mounted on the welding mounting seat (101); the suction auxiliary cover (702) is mounted on the suction vacuum pump (701); the suction auxiliary cover (702) is fixedly mounted on the welding positioning frame (202) on the right side; a circle of through holes on the welding positioning frame (202) is located on the inner side of the suction auxiliary cover (702); the suction vacuum pump (701) is used to increase the welding penetration effect at the gap of the cylinder.

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