A welding device for the butt joint of the short tube and the head of a stainless steel rocket tank

Abstract

The present invention provides a welding device for the butt joint annular seam between a short barrel and a head of a stainless steel rocket tank, comprising: a short barrel-end support base and a foldable column module, wherein the short barrel-end support base is used to support the foldable column module; the foldable column module comprises a short barrel-end support column and a short barrel-end internal support module, wherein the short barrel-end internal support module can rotate around the short barrel-end support column to make the free end of the short barrel-end internal support module approach or move away from the short barrel-end support column; the foldable column module can rotate around the circumferential direction of the short barrel-end support base to drive the short barrel-end internal support module to rotate around the circumferential direction of the short barrel-end support base to support the butt joint annular seam between the short barrel and the head. The welding device can simplify the butt joint annular seam welding process between the short barrel and the head of a stainless steel tank.

Description

Technical Field

[0001] The invention relates to the field of launch vehicles, and in particular to a welding device for the butt joint annular seam between a short cylinder and a head of a stainless steel rocket tank. Background Art

[0002] In the existing manufacturing process of large-diameter stainless steel rocket tanks, the annular seam welding between the short barrel and the head of the stainless steel tank mostly uses a full-circle inner support tool. In the manufacturing process, the full-circle inner support tool needs to be clamped once, and the welding of the entire rotating circular annular seam between the short barrels needs to be completed at one time. However, the full-circle inner support tool cannot be directly used for the annular seam welding between the head and the barrel section after clamping. The inner support tool needs to be installed inside the barrel section or the head, disassembled after welding, and then taken out from the manhole of the head. The overall process is complicated, the process control is difficult, and the weld cannot be leveled.

[0003] In order to simplify the welding process of the butt joint circumferential seam between the short tube and the head of the stainless steel tank, achieve stable and controllable welding process, and improve weld quality, it is particularly important to design a welding equipment for the butt joint circumferential seam between the short tube and the head of the stainless steel rocket tank. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a welding device for the annular seam between a short tube and a head of a stainless steel rocket tank.

[0005] The present invention provides a welding device for the annular seam between the short barrel and the end cap of a stainless steel rocket tank, comprising: a short barrel-end cap support base and a foldable column module, wherein the short barrel-end cap support base is used to support the foldable column module; the foldable column module comprises a short barrel-end cap support column and a short barrel-end cap internal support module, wherein the short barrel-end cap internal support module can rotate around the short barrel-end cap support column to make the free end of the short barrel-end cap internal support module approach or move away from the short barrel-end cap support column; the foldable column module can rotate around the circumferential direction of the short barrel-end cap support base to drive the short barrel-end cap internal support module to rotate around the circumferential direction of the short barrel-end cap support base to support the annular seam between the short barrel and the end cap; the end surface of the short barrel-end cap internal support module used to support the annular seam is a profile that matches the inner side surface of the short barrel.

[0006] According to one embodiment of the present invention, the short cylinder-head internal support module includes a connecting arm and a short cylinder-head internal support block, and the two ends of the connecting arm are respectively connected to the short cylinder-head support column and the short cylinder-head internal support block; the short cylinder-head internal support block is used to support the butt joint annular seam between the short cylinder and the head; the connecting arm can rotate around the short cylinder-head support column to drive the short cylinder-head internal support block to approach or move away from the short cylinder-head support column.

[0007] According to one embodiment of the present invention, the short cylinder-head internal support module also includes a connecting rod; the two ends of the connecting rod are respectively used to connect the free end of the connecting arm and the short cylinder-head internal support block, and the connecting rod can rotate around the connecting arm to make the short cylinder-head internal support block approach or move away from the docking annular gap between the short cylinder and the head.

[0008] According to one embodiment of the present invention, the short cylinder-head internal support module also includes a first driving connecting rod; one end of the first driving connecting rod is connected to the short cylinder-head support column through a first screw slider, and the other end of the first driving connecting rod is connected to the free end of the connecting arm; the first screw slider can slide along the axial direction of the short cylinder-head support column, and the first driving connecting rod can be retracted to drive the connecting arm to rotate.

[0009] According to one embodiment of the present invention, the short tube-head internal support module also includes a second connecting rod; one end of the second connecting rod is connected to the connecting arm through a second screw slider, and the other end of the second connecting rod is connected to the free end of the connecting rod; the second screw slider can slide along the axial direction of the connecting arm to drive the connecting rod to rotate.

[0010] According to one embodiment of the present invention, support rods are respectively arranged on both sides of the connecting rod, and the support rods are used to tighten the inner side surface of the short tube-head inner support block.

[0011] According to one embodiment of the present invention, a two-axis connecting rod is arranged at the free end of the connecting rod, and the short tube-head inner support block is arranged at the end of the two-axis connecting rod away from the connecting rod; the two-axis connecting rod can rotate relative to the connecting rod around its axial direction to drive the short tube-head inner support block to rotate.

[0012] According to one embodiment of the present invention, a rotating shaft perpendicular to the axial direction of the two-axis connecting rod is arranged at the end of the two-axis connecting rod away from the connecting rod, and the short cylinder-head inner support block is fixedly connected to the rotating shaft; the rotating shaft rotates, driving the short cylinder-head inner support block to rotate relative to the two-axis connecting rod.

[0013] According to one embodiment of the present invention, a short cylinder-head protective gas inlet is arranged on the upper end surface of the short cylinder-head inner support block, and a short cylinder-head arc-shaped gas protection groove is arranged on the contact surface between the short cylinder-head inner support block and the short cylinder along its circumferential direction, and the short cylinder-head protective gas inlet is connected with the short cylinder-head arc-shaped gas protection groove to provide protective gas to the butt annular seam between the short cylinder and the head.

[0014] According to one embodiment of the present invention, the contact surface between the short cylinder-end head inner support block and the short cylinder may be provided with an arc-shaped inner support copper steel plate to prevent splashing objects from adhering to the short cylinder-end head inner support block.

[0015] The welding equipment for the butt joint annular seam between the short tube and the head of a stainless steel rocket tank of the present invention simplifies the welding process of the butt joint annular seam between the short tube and the head of the stainless steel tank by folding and unfolding the short tube-head inner support module.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are a part of the specification of the present invention, and illustrate exemplary embodiments of the present invention. Together with the description of the specification, the accompanying drawings are used to explain the principles of the invention.

[0018] Figure 1 It is a stereoscopic diagram of a welding device for the butt joint annular seam between a short tube and a head of a stainless steel rocket tank according to an embodiment of the present invention;

[0019] Figure 2 It is an expanded view of a welding device for the butt joint annular seam between a short tube and a head of a stainless steel rocket tank according to an embodiment of the present invention;

[0020] Figure 3 It is a folded diagram of a welding device for the butt joint annular seam between a short tube and a head of a stainless steel rocket tank according to an embodiment of the present invention;

[0021] Figure 4 It is a partial stereoscopic diagram of a short tube-end support module according to an embodiment of the present invention;

[0022] Figure 5 yes Figure 4 Side view of

[0023] Figure 6 yes Figure 4 Top view;

[0024] Figure 7 yes Figure 4 Side view of

[0025] Figure 8 It is a partial stereoscopic diagram of a short tube-end support module according to an embodiment of the present invention;

[0026] Fig. 9 It is a three-dimensional diagram of a short tube-end cap inner support block according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 2-3-1 short cylinder-end support base; 2-3-2 foldable column module; 2-3-2-1 rotary gear; 2-3-2-2 driving gear mechanism; 2-3-2-3 short cylinder-end support column; 2-3-2-4 first screw slider; 2-3-2-5 first driving connecting rod; 2-3-2-6 first ejection cylinder; 2-3-2-7 connecting arm; 2-3-2-8 second screw slider; 2-3-2-9 second connecting rod; connecting rod 2-3-2 -10; 2-3-2-11 support rod; 2-3-2-12 second-axis connecting rod; 2-3-2-13 short cylinder - head inner support block; 2-3-2-14 second ejection cylinder; 2-3-2-15 retraction cylinder; 2-3-2-16 short cylinder - head support base column; 2-3-2-13-1 short cylinder - head rolling support surface; 2-3-2-13-2 short cylinder - head arc-shaped gas protection groove; 2-3-2-13-3 short cylinder - head protection gas inlet. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the sizes of some structural components or areas in the drawings may be enlarged for other structural components or areas to help understand the embodiments of the present invention.

[0030] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise specified, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] In addition, the terms "include", "comprise", "have" or any other variations thereof are intended to cover non-exclusive inclusion, so that a structure or component including a series of elements includes not only those elements, but also other mechanical elements that are not explicitly listed or inherent in the structure or component. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the article or device including the elements.

[0032] Spatially related terms such as "below", "beneath", "under", "low", "above", "on", "high", etc. are used to facilitate description to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. In addition, for example, "one element is above / below another element" can mean that the two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and do not specifically refer to the meaning of order or sequence, and should not be regarded as limiting. Similar terms are used throughout the description to represent similar elements.

[0033] In the process of describing the present invention below, in certain scene descriptions, only "rocket", "launch vehicle", "spacecraft", "space launch vehicle" or "missile" may be used. This is only for the convenience of description, and its connotation is not limited to the specific words used. Generally, the launch vehicles and rockets of the present invention include not only space vehicles used to carry satellites or spacecraft or other probes, but also various types of missiles, rockets and other weapons used to carry military payloads, as well as similar products that can send payloads into the air. When interpreting the above specific words, those skilled in the art shall not limit launch vehicles and rockets to only one of launch vehicles or missiles based on the specific words used to describe the scene, thereby narrowing the scope of protection of the present invention.

[0034] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention.

[0035] Figure 1 It is a stereoscopic diagram of a welding device for the butt joint annular seam between a short tube and a head of a stainless steel rocket tank according to an embodiment of the present invention; Figure 2 It is an expanded view of a welding device for the butt joint annular seam between a short tube and a head of a stainless steel rocket tank according to an embodiment of the present invention; Figure 3 It is a folded diagram of a welding device for the butt joint annular seam between a short tube and a head of a stainless steel rocket tank according to an embodiment of the present invention; Figure 4 It is a partial stereoscopic diagram of a short tube-end support module according to an embodiment of the present invention; Figure 5 yes Figure 4 Side view of Figure 6 yes Figure 4 Top view; Figure 7 yes Figure 4 Side view of Figure 8 It is a partial stereoscopic diagram of a short tube-end support module according to an embodiment of the present invention; Fig. 9 It is a three-dimensional diagram of a short tube-end cap inner support block according to an embodiment of the present invention.

[0036] like Figure 1-3 As shown, the present invention provides a welding device for the butt joint annular seam between the short barrel and the end cap of a stainless steel rocket tank, comprising: a short barrel-end cap support base 2-3-1 and a foldable column module 2-3-2, wherein the short barrel-end cap support base 2-3-1 is used to support the foldable column module 2-3-2. The foldable column module 2-3-2 comprises a short barrel-end cap support column 2-3-2-3 and a short barrel-end cap internal support module, wherein the short barrel-end cap internal support module can rotate around the short barrel-end cap support column 2-3-2-3 so that the free end of the short barrel-end cap internal support module approaches or moves away from the short barrel-end cap support column 2-3-2-3. The foldable column module 2-3-2 can rotate around the circumferential direction of the short barrel-end cap support base 2-3-1 to drive the short barrel-end cap internal support module to rotate around the circumferential direction of the short barrel-end cap support base 2-3-1 to support the butt joint annular seam between the short barrel and the end cap. The end surface of the short tube-head inner support module used to support the annular seam is a profile that matches the inner side surface of the short tube.

[0037] Specifically, in the existing short-tube welding of tank heads, the internal support tooling mostly adopts an integral internal support structure, which has the following characteristics: first, it is mainly used for aluminum alloy or other steel tanks with a wall thickness greater than 4 mm. The inner wall of such tanks has high rigidity and high requirements for roundness, and an integral support is required to meet production needs; second, the internal support structure of the integral support equipment is complex and difficult to manufacture. It is restricted by the interference of the circuit and gas lines of the internal support equipment, and the overall support structure is difficult to shrink, making it difficult to balance the equipment volume and rigidity. When the bottom flange of the tank bottom head is limited, the use of an integral internal support equipment will inevitably weaken the rigidity of the internal support tooling and reduce the space occupied by a single internal support; third, the existing integral internal support tooling has poor rigidity in the radial direction in the manufacture of large tanks (tanks with a diameter of more than 3.5 m), and the support arm is too long. The tooling needs to extend deeper into the tank, limiting its scope of use.

[0038] The welding equipment of this embodiment realizes the folding and unfolding of the short cylinder-end head inner support module by rotating the short cylinder-end head inner support module around the short cylinder-end head support column 2-3-2-3 in the plane where the axis of the short cylinder-end head support column 2-3-2-3 is located. When welding the butt joint annular seam between the short cylinder and the end head, it is not necessary to disassemble the welding equipment, that is, the support for the welding of the annular seam of the end head short cylinder can be realized through the manhole, which simplifies the process of welding the butt joint annular seam between the short cylinder and the end head of the stainless steel storage tank.

[0039] According to one embodiment of the present invention, a short cylinder-head support base column 2-3-2-16 is arranged at the lower end of the short cylinder-head support column 2-3-2-3, and the short cylinder-head support column 2-3-2-3 is rotatably connected to the short cylinder-head support base column 2-3-2-16.

[0040] Further, the short cylinder-end head support base column 2-3-2-16 is provided with a rotary gear 2-3-2-1 along its circumferential direction, and the short cylinder-end head support base column 2-3-2-3 is provided with a driving gear mechanism 2-3-2-2 corresponding to the rotary gear 2-3-2-1. The rotary gear 2-3-2-1 cooperates with the driving gear mechanism 2-3-2-2 to drive the short cylinder-end head support base column 2-3-2-3 to rotate relative to the short cylinder-end head support base column 2-3-2-16 or the short cylinder-end head support base 2-3-1.

[0041] In this embodiment, the rotary gear 2-3-2-1 can be arranged near the upper end of the short cylinder-head support base column 2-3-2-16, and the driving gear mechanism 2-3-2-2 is arranged near the lower end of the short cylinder-head support column 2-3-2-3.

[0042] According to one embodiment of the present invention, the short cylinder-end cap internal support module includes a connecting arm 2-3-2-7 and a short cylinder-end cap internal support block 2-3-2-13, and the two ends of the connecting arm 2-3-2-7 are respectively connected to the short cylinder-end cap support column 2-3-2-3 and the short cylinder-end cap internal support block 2-3-2-13. The short cylinder-end cap internal support block 2-3-2-13 is used to support the butt joint annular seam between the short cylinder and the end cap. The connecting arm 2-3-2-7 can rotate around the short cylinder-end cap support column 2-3-2-3 to drive the short cylinder-end cap internal support block 2-3-2-13 to move closer to or away from the short cylinder-end cap support column 2-3-2-3.

[0043] In this embodiment, one end of the connecting arm 2-3-2-7 is rotatably connected to the short cylinder-end support column 2-3-2-3. For example, the connecting arm 2-3-2-7 can be rotatably connected to the top of the short cylinder-end support column 2-3-2-3, and the folding and unfolding of the foldable column module 2-3-2 is achieved by the rotation of the connecting arm 2-3-2-7. The end face of the short cylinder-end inner support block 2-3-2-13 in contact with the short cylinder or the end can be an arcuate surface or a cylindrical surface, for example, the radius of the arcuate surface can be equal to the radius of the inner surface of the short cylinder cylinder. The short cylinder-end inner support block 2-3-2-13 can be a non-full circle, for example, the circumferential length of the short cylinder-end inner support block 2-3-2-13 can be 1 / X of the inner circumference of the short cylinder, and X can be 3~12. For example, the arc length of the arc surface of the short cylinder-end head inner support block 2-3-2-13 can be 1-3m, and the width can be 50-200mm. After the short cylinder-end head inner support module is folded and contracted, the overall volume and space occupied are about 1 / X of the space occupied by the full-circle inner support tooling, which can reduce the complexity and cost of the system.

[0044] According to one embodiment of the present invention, in addition to the connecting arm 2-3-2-7 and the short cylinder-end cap internal support block 2-3-2-13, the short cylinder-end cap internal support module also includes a connecting rod 2-3-2-10. The two ends of the connecting rod 2-3-2-10 are respectively used to connect the free end of the connecting arm 2-3-2-7 and the short cylinder-end cap internal support block 2-3-2-13. The connecting rod 2-3-2-10 can rotate around the connecting arm 2-3-2-7 (for example, it can rotate in the plane where the axis of the connecting arm 2-3-2-7 is located) to make the short cylinder-end cap internal support block 2-3-2-13 close to or away from the butt joint annular gap between the short cylinder and the end cap.

[0045] In this embodiment, one end of the connecting rod 2-3-2-10 can be connected to the free end of the connecting arm 2-3-2-7 through a pin, and the connecting rod 2-3-2-10 can rotate around the pin (i.e., perform circular motion) to achieve the opening and closing of the connecting arm 2-3-2-7 and the connecting rod 2-3-2-10. Figure 4 and 5 As shown, the connecting rod 2-3-2-10 can be L-shaped.

[0046] According to one embodiment of the present invention, in addition to the connecting arm 2-3-2-7 and the short cylinder-end cap internal support block 2-3-2-13, the short cylinder-end cap internal support module also includes a first drive link 2-3-2-5. One end of the first drive link 2-3-2-5 is connected to the short cylinder-end cap support column 2-3-2-3 through the first screw slider 2-3-2-4, and the other end of the first drive link 2-3-2-5 is connected to the free end of the connecting arm 2-3-2-7. The first screw slider 2-3-2-4 can slide along the axial direction of the short cylinder-end cap support column 2-3-2-3, and the first drive link 2-3-2-5 can be retracted to drive the connecting arm 2-3-2-7 to rotate.

[0047] In this embodiment, the short cylinder-end support column 2-3-2-3 is provided with a first screw rod along its axial direction, and the first screw rod slider 2-3-2-4 moves along the first screw rod, and cooperates with the first driving connecting rod 2-3-2-5 to push the connecting arm 2-3-2-7 to open and close the arc movement around the short cylinder-end support column 2-3-2-3. The first driving connecting rod 2-3-2-5 can be a cylinder.

[0048] According to one embodiment of the present invention, a first ejection cylinder 2-3-2-6 is disposed on the side of the short cylinder-end support column 2-3-2-3. The first ejection cylinder 2-3-2-6 ejects, cooperates with the first screw slider 2-3-2-4 and the first driving connecting rod 2-3-2-5, and pushes the connecting arm 2-3-2-7 to rotate.

[0049] In this embodiment, for example, when the connecting arm 2-3-2-7 is substantially in contact with or parallel to the short cylinder-end support column 2-3-2-3, the first ejection cylinder 2-3-2-6 is ejected, and cooperates with the first screw slider 2-3-2-4 and the first driving connecting rod 2-3-2-5 to push the connecting arm 2-3-2-7 to rotate, thereby realizing the opening of the connecting arm 2-3-2-7. The first ejection cylinder 2-3-2-6 can be an electric drive cylinder. The first ejection cylinder 2-3-2-6 can be installed on the side of the short cylinder-end support column 2-3-2-3 by screws.

[0050] According to one embodiment of the present invention, in addition to the connecting arm 2-3-2-7, the short cylinder-end cap internal support block 2-3-2-13 and the connecting rod 2-3-2-10, the short cylinder-end cap internal support module also includes a second connecting rod 2-3-2-9. One end of the second connecting rod 2-3-2-9 is connected to the connecting arm 2-3-2-7 through the second screw slider 2-3-2-8, and the other end of the second connecting rod 2-3-2-9 is connected to the free end of the connecting rod 2-3-2-10. The second screw slider 2-3-2-8 can slide along the axial direction of the connecting arm 2-3-2-7 to drive the connecting rod 2-3-2-10 to rotate.

[0051] In this embodiment, the connecting arm 2-3-2-7 is provided with a second screw rod along its axial direction, and the second screw rod slider 2-3-2-8 moves along the second screw rod, driving the second connecting rod 2-3-2-9 to push or pull the connecting rod 2-3-2-10 to rotate, so as to realize the opening and closing of the connecting arm 2-3-2-7 and the connecting rod 2-3-2-10. The two ends of the second connecting rod 2-3-2-9 can be connected to the second screw rod slider 2-3-2-8 and the connecting rod 2-3-2-10 respectively through pins. The foldable column module can drive the connecting arm 2-3-2-7 and the connecting rod 2-3-2-10 to rotate through the first driving connecting rod 2-3-2-5 and the second connecting rod 2-3-2-9, thereby realizing the folding and unfolding of the foldable column module 2-3-2.

[0052] According to one embodiment of the present invention, a second ejection cylinder 2-3-2-14 is disposed on the side of the connecting arm 2-3-2-7. The second ejection cylinder 2-3-2-14 ejects and cooperates with the second screw slider 2-3-2-8 and the second connecting rod 2-3-2-9 to push the connecting rod 2-3-2-10 to rotate.

[0053] In this embodiment, for example, when the connecting rod 2-3-2-10 is substantially in contact with or parallel to the connecting arm 2-3-2-7, the second ejection cylinder 2-3-2-14 is ejected, and cooperates with the second screw slider 2-3-2-8 and the second connecting rod 2-3-2-9 to push the connecting rod 2-3-2-10 to rotate, thereby realizing the opening of the connecting rod 2-3-2-10. The second ejection cylinder 2-3-2-14 can be an electric drive cylinder. The second ejection cylinder 2-3-2-14 can be installed on the side of the connecting arm 2-3-2-7 by screws.

[0054] like Figure 4 and 6 As shown, according to one embodiment of the present invention, support rods 2-3-2-11 are respectively arranged on both sides of the connecting rod 2-3-2-10, and the support rods 2-3-2-11 are used to tighten the inner side surface of the short tube-head inner support block 2-3-2-13.

[0055] In this embodiment, for example, when the outer side surface of the short cylinder-end cap inner support block 2-3-2-13 is pressed against the short cylinder skin, the support rod 2-3-2-11 is pressed against the inner side surface of the short cylinder-end cap inner support block 2-3-2-13, providing internal support and positioning to the short cylinder-end cap inner support block 2-3-2-13. Support rods 2-3-2-11 are respectively arranged on both sides of the connecting rod 2-3-2-10, which can provide more uniform internal support to the short cylinder-end cap inner support block 2-3-2-13, improve the rigidity of the system, and at the same time, can improve the ability of the short cylinder-end cap inner support block 2-3-2-13 to withstand radial pressure, making the support more stable. For example, the support rod 2-3-2-11 can be a cylinder support rod. One end of the support rod 2-3-2-11 is rotatably connected to the connecting rod 2-3-2-10.

[0056] like Figure 6 and 7 As shown, according to one embodiment of the present invention, the connecting rod 2-3-2-10 is provided with a retraction cylinder 2-3-2-15 connected to the support rod 2-3-2-11, and the retraction cylinder 2-3-2-15 is retracted to allow the support rod 2-3-2-11 to rotate closer to or away from the connecting rod 2-3-2-10.

[0057] In this embodiment, the retracting cylinder 2-3-2-15 telescopes and controls the support rod 2-3-2-11 to rotate close to or away from the connecting rod 2-3-2-10, so as to realize the opening and closing of the support rod 2-3-2-11. The retracting cylinder 2-3-2-15 can be a cylinder. The retracting cylinder 2-3-2-15 can be arranged in the connecting rod 2-3-2-10.

[0058] According to one embodiment of the present invention, a two-axis connecting rod 2-3-2-10 is provided at the free end of the connecting rod 2-3-2-10, and a short cylinder-end support block 2-3-2-13 is provided at the end of the two-axis connecting rod 2-3-2-10 away from the connecting rod 2-3-2-10. For example, the two-axis connecting rod 2-3-2-10 can rotate relative to the connecting rod 2-3-2-10 around its axial direction to drive the short cylinder-end support block 2-3-2-13 to rotate.

[0059] In this embodiment, a first motor 2-3-2-12-1 may be provided at the end of the connecting rod 2-3-2-10 for connecting the two-axis connecting rod 2-3-2-12. The first motor 2-3-2-12-1 is used to drive the two-axis connecting rod 2-3-2-12 and the short cylinder-head inner support block 2-3-2-13 to rotate around the axial direction of the connecting rod 2-3-2-10 to realize the folding of the short cylinder-head inner support block 2-3-2-13.

[0060] like Figure 8 As shown, according to one embodiment of the present invention, a rotating shaft 2-3-2-12-3 perpendicular to the axial direction of the two-axis connecting rod 2-3-2-10 is arranged at the end away from the connecting rod 2-3-2-10, and the short cylinder-end cap inner support block 2-3-2-13 is fixedly connected to the rotating shaft 2-3-2-12-3. The rotating shaft 2-3-2-12-3 rotates, driving the short cylinder-end cap inner support block 2-3-2-13 to rotate relative to the two-axis connecting rod 2-3-2-10.

[0061] In this embodiment, the rotating shaft 2-3-2-12-3 rotates, driving the short cylinder-end support block 2-3-2-13 to rotate around the two-axis connecting rod 2-3-2-12 in the plane where the axis of the two-axis connecting rod 2-3-2-12 is located, so that the short cylinder end support module can be further folded. The two-axis connecting rod 2-3-2-12 can be provided with a second motor 2-3-12-2 connected to the rotating shaft 2-3-2-12-3, and the second motor 2-3-12-2 is used to drive the rotating shaft 2-3-2-12-3 to rotate around its axial direction, so as to drive the short cylinder-end support block 2-3-2-13 to rotate around the two-axis connecting rod 2-3-2-12 in the plane where the axis of the two-axis connecting rod 2-3-2-12 is located. The first motor 2-3-2-12-1 and the second motor 2-3-12-2 cooperate to realize the opening and closing of the short cylinder-end inner support block 2-3-2-13 and the connecting rod 2-3-2-10. The welding equipment further reduces the occupied volume and space through multi-degree-of-freedom folding.

[0062] like Fig. 9As shown, according to one embodiment of the present invention, a short cylinder-head protective gas inlet 2-3-2-13-3 is arranged on the upper end surface of the short cylinder-head inner support block 2-3-2-13, and a short cylinder-head arcuate gas protection groove 2-3-2-13-2 is arranged on the contact surface between the short cylinder-head inner support block 2-3-2-13 and the short cylinder along its circumferential direction, and the short cylinder-head protective gas inlet 2-3-2-13-3 is connected with the short cylinder-head arcuate gas protection groove 2-3-2-13-2 to provide protective gas to the butt annular seam between the short cylinder and the head.

[0063] In this embodiment, the upper end surface of the short cylinder-end inner support block 2-3-2-13 can be provided with a plurality of short cylinder-end protective gas inlets 2-3-2-13-3 along its length direction. The groove width of the short cylinder-end arc-shaped gas protection groove 2-3-2-13-2 can be 5-20 mm, and the groove depth can be 20-50 mm. The short cylinder-end arc-shaped gas protection groove 2-3-2-13-2 can be 100 mm away from the upper end surface of the short cylinder-end inner support block 2-3-2-13.

[0064] According to one embodiment of the present invention, an arc-shaped inner support copper steel plate can be provided on the contact surface between the short cylinder-end head inner support block 2-3-2-13 and the short cylinder to prevent splashing objects from sticking to the short cylinder-end head inner support block 2-3-2-13.

[0065] In this embodiment, the arc-shaped inner supporting copper steel plate can be arranged around the short cylinder-head arc-shaped gas protection groove 2-3-2-13-2.

[0066] According to one embodiment of the present invention, the contact surface between the short cylinder-end cap inner support block 2-3-2-13 and the short cylinder is provided with a short cylinder-end cap rolling support surface 2-3-2-13-1 along its circumferential direction. When rolling the annular seam between the short cylinder and the end cap, the short cylinder-end cap rolling support surface 2-3-2-13-1 is used to support the annular seam.

[0067] In this embodiment, the short cylinder-end head rolling support surface 2-3-2-13-1 can be set 50mm below the short cylinder-end head arc-shaped gas protection groove 2-3-2-13-2, and the width of the short cylinder-end head rolling support surface 2-3-2-13-1 can be 20-60mm. The short cylinder-end head rolling support surface 2-3-2-13-1 can be embedded in the short cylinder-end head inner support block 2-3-2-13 using a steel plate or a cemented carbide as a base material.

[0068] The above-mentioned embodiments of the present invention can be combined with each other and have corresponding technical effects.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding device for the butt joint annular seam between the short tube and the head of a stainless steel rocket tank, characterized in that: include: A short cylinder-end support base and a foldable column module, wherein the short cylinder-end support base is used to support the foldable column module; The foldable column module includes a short cylinder-end cap supporting column and a short cylinder-end cap internal support module; the foldable column module can rotate around the circumferential direction of the short cylinder-end cap supporting base to drive the short cylinder-end cap internal support module to rotate around the circumferential direction of the short cylinder-end cap supporting base to support the butt joint annular seam between the short cylinder and the end cap; the end surface of the short cylinder-end cap internal support module used for supporting the annular seam is a profile that matches the inner side surface of the short cylinder; The short cylinder-end cap internal support module comprises a connecting arm and a short cylinder-end cap internal support block, the two ends of the connecting arm are respectively connected to the short cylinder-end cap support column and the short cylinder-end cap internal support block; the short cylinder-end cap internal support block is used to support the butt joint annular seam between the short cylinder and the end cap; the connecting arm can rotate around the short cylinder-end cap support column to drive the short cylinder-end cap internal support block to approach or move away from the short cylinder-end cap support column; The short cylinder-end cap internal support module also includes a connecting rod; the two ends of the connecting rod are respectively used to connect the free end of the connecting arm and the short cylinder-end cap internal support block, and the connecting rod can rotate around the connecting arm to make the short cylinder-end cap internal support block approach or move away from the butt joint annular gap between the short cylinder and the end cap; A two-axis connecting rod is arranged at the free end of the connecting rod, and the short tube-end support block is arranged at the end of the two-axis connecting rod away from the connecting rod; the two-axis connecting rod can rotate relative to the connecting rod around its axial direction to drive the short tube-end support block to rotate.

2. The welding device according to claim 1, characterized in that The short cylinder-head internal support module also includes a first driving connecting rod; one end of the first driving connecting rod is connected to the short cylinder-head support column through a first screw slider, and the other end of the first driving connecting rod is connected to the free end of the connecting arm; the first screw slider can slide along the axial direction of the short cylinder-head support column, and the first driving connecting rod can be retracted to drive the connecting arm to rotate.

3. The welding device according to claim 1, characterized in that The short tube-head internal support module also includes a second connecting rod; one end of the second connecting rod is connected to the connecting arm through a second screw slider, and the other end of the second connecting rod is connected to the free end of the connecting rod; the second screw slider can slide along the axial direction of the connecting arm to drive the connecting rod to rotate.

4. The welding device according to claim 1, characterized in that: Support rods are respectively arranged on both sides of the connecting rod, and the support rods are used to tighten the inner side surface of the short cylinder-head inner support block.

5. The welding device according to claim 1, characterized in that The end of the two-axis connecting rod away from the connecting rod is provided with a rotating shaft perpendicular to its axial direction, and the short tube-head inner support block is fixedly connected to the rotating shaft; the rotating shaft rotates, driving the short tube-head inner support block to rotate relative to the two-axis connecting rod.

6. The welding device according to claim 1, characterized in that A short cylinder-head protective gas inlet is arranged on the upper end surface of the short cylinder-head inner support block, and a short cylinder-head arc-shaped gas protection groove is arranged on the contact surface between the short cylinder-head inner support block and the short cylinder along its circumferential direction. The short cylinder-head protective gas inlet is connected with the short cylinder-head arc-shaped gas protection groove to provide protective gas to the butt annular seam between the short cylinder and the head.

7. The welding device according to claim 1, characterized in that The contact surface between the short cylinder-end head inner support block and the short cylinder can be provided with an arc-shaped inner support copper steel plate to prevent splashing objects from adhering to the short cylinder-end head inner support block.

Images