Clamping device for welding rocket tank cylinder section and stringer

Abstract

The invention discloses a clamping device for welding a rocket tank cylinder section and a stringer. The device comprises a first connecting rod, a second connecting rod, a third connecting rod and a pressing mechanism, wherein the first connecting rod is located on one side of the second connecting rod and is parallel to the second connecting rod. The third connecting rod is located below the first connecting rod and the second connecting rod, and the two ends of the third connecting rod are detachably connected with the bottom end of the first connecting rod and the bottom end of the second connecting rod correspondingly. A pressing mechanism is installed at the top end of the first connecting rod, a back plate is installed at the top end of the second connecting rod, the pressing mechanism corresponds to the back plate, and the pressing mechanism is used for pressing a stringer at the circular seam of the barrel section. According to the welding method, the situation that the circular seam of the cylinder section shrinks inwards in the radial direction in the welding process can be avoided, it is guaranteed that welding work of the rocket storage tank and the stringer is conducted smoothly, meanwhile, spot welding equipment is not used, and the overall production efficiency of the rocket storage tank is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rocket tanks, and in particular to a clamping device for welding rocket tank barrel sections and stringers. Background Art

[0002] The rocket tank is an essential core component of the launch vehicle, which is very critical and important to the launch vehicle. During the launch and flight of the launch vehicle, the rocket tank must be able to withstand huge loads and provide sufficient support for the launch vehicle. Therefore, it is very necessary to improve the overall structural strength of the rocket tank.

[0003] At present, the way to improve the overall structural strength of the rocket tank is to weld stringers on the rocket tank barrel section, for example, to weld stringers on the inner wall and outer wall of the rocket tank along its axial direction to improve the overall structural strength of the rocket tank. However, when laser welding stringers on a rocket tank with a thin wall thickness, since the rocket tank is formed by stacking several barrel sections through circumferential seam welding, the circumferential seams of the barrel sections will shrink radially due to the heat effect of laser welding, which will cause the circumferential seams of the barrel sections to not fit tightly with the stringers, and the stringers will be unable to be welded to the rocket tank.

[0004] The traditional method to solve the problem of loose fit between the cylinder segment annular seam and the stringer is usually to place the cylinder segment annular seam and the stringer between two electrodes of the spot welding equipment with the help of spot welding equipment, and clamp the two electrodes with external clamping force to make the stringer fit with the cylinder segment annular seam. However, since this method uses spot welding equipment, it increases the circulation process of spot welding equipment in the entire rocket tank production process, thereby reducing the overall production efficiency of the rocket tank.

[0005] Therefore, how to make the annular seam of the barrel section fit tightly with the stringers to ensure the smooth welding of the rocket tank and the stringers, while also improving the overall production efficiency of the rocket tank, has become a problem that needs to be solved urgently. Summary of the invention

[0006] The purpose of the present invention is to provide a clamping device for welding rocket tank barrel sections and stringers to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above object, the present invention provides the following solutions: The present invention provides a clamping device for welding a rocket tank barrel section and a stringer, comprising a first connecting rod, a second connecting rod, a third connecting rod and a clamping mechanism, wherein: The first connecting rod is located at one side of the second connecting rod and is arranged parallel to the second connecting rod; The third connecting rod is located below the first connecting rod and the second connecting rod, and two ends of the third connecting rod are detachably connected to the bottom end of the first connecting rod and the bottom end of the second connecting rod respectively; A clamping mechanism is installed at the top end of the first connecting rod, and a back plate is installed at the top end of the second connecting rod. The clamping mechanism and the back plate are arranged correspondingly. The clamping mechanism is used to clamp the girders at the annular seam of the barrel section, and the back plate is used to clamp the side wall of one end of the barrel section away from the girders.

[0008] According to one embodiment of the present invention, the clamping mechanism comprises a clamping rod slidably mounted on the top end of the first connecting rod, a clamping block is mounted on one end of the clamping rod close to the back plate, the clamping block is arranged corresponding to the back plate, and the clamping block is used to clamp the web of the stringer at the annular seam of the barrel section; The top end of the first connecting rod is also threadedly connected to a lead screw, which is located on one side of the clamping rod and is arranged parallel to the clamping rod; a rotating block is installed at the end of the lead screw away from the first connecting rod, and the end of the rotating block close to the first connecting rod is in contact and cooperate with the end of the clamping rod away from the first connecting rod.

[0009] According to an embodiment of the present invention, a connecting block is installed at one end of the clamping rod away from the first connecting rod, and one end of the rotating block close to the first connecting rod is in contact with one end of the connecting block away from the first connecting rod.

[0010] According to an embodiment of the present invention, the lead screw passes through the connecting block and is slidably engaged with the connecting block.

[0011] According to one embodiment of the present invention, auxiliary pressing pieces are installed on the pressing block. The auxiliary pressing pieces are arranged at both ends of the pressing block and along the length direction of the stringer. The auxiliary pressing pieces are used to press the flange plates of the stringers at the annular seams of the barrel sections.

[0012] According to one embodiment of the present invention, the auxiliary clamping member includes a plurality of clamping bolts sequentially arranged along the length direction of the stringer, the clamping bolts are threadedly connected to the clamping block, and the clamping bolts are used to clamp the flange plate of the stringer at the annular seam of the barrel section.

[0013] According to an embodiment of the present invention, the third connecting rod is a U-shaped structure, and two ends of the opening of the third connecting rod are respectively connected to the bottom end of the first connecting rod and the bottom end of the second connecting rod.

[0014] According to one embodiment of the present invention, connecting flanges are provided between the third connecting rod and the first connecting rod, and between the third connecting rod and the second connecting rod, and the two ends of the opening of the third connecting rod are detachably connected to the bottom end of the first connecting rod and the bottom end of the second connecting rod respectively through the connecting flanges.

[0015] According to one embodiment of the present invention, a limiting nut is threadedly installed on the lead screw, and the limiting nut is located between the first connecting rod and the connecting block; during the process in which the clamping mechanism clamps the stringer at the annular seam of the barrel section, the limiting nut does not contact the first connecting rod.

[0016] According to an embodiment of the present invention, a rotating handle is installed on the rotating block.

[0017] The present invention has at least the following technical effects: The present invention provides a clamping device for welding a rocket tank barrel section and a stringer. The present invention can clamp the stringer and the barrel section at the annular seam through the arrangement of a clamping mechanism and a back plate, and make the stringer and the barrel section at the annular seam fit tightly, thereby avoiding radial shrinkage at the annular seam of the barrel section during welding, thereby ensuring smooth welding of the rocket tank and the stringer.

[0018] The present invention can clamp the stringers and the tube sections at the annular seams by setting up a clamping mechanism and a back plate, thereby avoiding the use of spot welding equipment and not increasing the circulation flow of the spot welding equipment in the entire rocket tank production process, thereby improving the overall production efficiency of the rocket tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the overall structure from another angle; Figure 3 for Figure 1 A partial enlarged view of the middle A; Figure 4 for Figure 2 A partial enlarged view of point B in the middle; Figure 5 It is a schematic diagram of the overall structure of the pressing mechanism in the present invention; Figure 6 for Figure 5 Schematic diagram of the overall structure from another angle; Figure 7 It is a schematic diagram of the overall structure of the compression block in the present invention; Figure 8 for Figure 7 Schematic diagram of the overall structure from another angle; Fig. 9 It is a schematic diagram of the overall structure of the back plate in the present invention; Fig.10 for Fig. 9 Schematic diagram of the overall structure from another angle; Fig.11 It is a schematic diagram of the overall structure of the connecting block in the present invention; Fig.12 for Fig.11 Schematic diagram of the overall structure from another angle; Fig.13 It is a schematic diagram of the overall structure of the clamping mechanism in the present invention being clamped on the beam; Fig.14 for Fig.13 A partial enlarged view of point C in the middle; Fig.15 for Fig.13 Schematic diagram of the overall structure from another angle; Among them, 1. the first connecting rod; 2. the second connecting rod; 3. the third connecting rod; 4. the connecting flange; 5. the handle; 6. the rotating handle; 7. the screw; 8. the connecting block; 9. the clamping rod; 10. the clamping block; 11. the clamping bolt; 12. the limiting nut; 13. the back plate; 14. the barrel section; 15. the beam; 16. the rotating block. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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 vehicle of the present invention includes not only space launch vehicles and rockets used to carry satellites or spacecraft or other probes, but also includes weapons such as various missiles and rockets, 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 the launch vehicle to only one of the space launch vehicle, rocket or missile based on the specific words used to describe the scene, thereby narrowing the scope of protection of the present invention.

[0026] 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.

[0027] Example 1 The present invention provides a clamping device for welding rocket tank barrel sections and stringers, referring to Figure 1 and Figure 2 , comprising a first connecting rod 1, a second connecting rod 2, a third connecting rod 3 and a clamping mechanism, wherein: Reference Figure 1 and Figure 2 The first connecting rod 1 is located on one side of the second connecting rod 2 and is arranged parallel to the second connecting rod 2 .

[0028] In this embodiment, refer to Figure 1 and Figure 2 The first connecting rod 1 and the second connecting rod 2 can preferably be a rectangular parallelepiped structure.

[0029] Reference Figure 1 and Figure 2 The third connecting rod 3 is located below the first connecting rod 1 and the second connecting rod 2 (i.e. Figure 1 The third connecting rod 3 is located below the first connecting rod 1 and the second connecting rod 2, and the two ends of the third connecting rod 3 are respectively connected to the bottom end of the first connecting rod 1 (i.e., Figure 1 The bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2 (i.e. Figure 1 The bottom end of the second connecting rod 2 in the middle) is detachably connected to connect the first connecting rod 1 and the second connecting rod 2.

[0030] In this embodiment, refer to Figure 1 and Figure 2 The third connecting rod 3 may preferably be a U-shaped structure, and the cross-section of the third connecting rod 3 may preferably be a rectangular structure.

[0031] In this embodiment, refer to Figure 1 and Figure 2 , the two ends of the opening of the third connecting rod 3 are respectively connected to the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2. Preferably, the top ends of the opening of the third connecting rod 3 (i.e., the opening of the U-shaped structure) are respectively connected to the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2. More preferably, the area and shape of the top ends of the two ends of the opening of the third connecting rod 3 are exactly the same as the area and shape of the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2, so that it can be better connected to the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2.

[0032] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 A connecting flange 4 is provided between the third connecting rod 3 and the first connecting rod 1, and between the third connecting rod 3 and the second connecting rod 2. The two ends of the opening of the third connecting rod 3 are detachably connected to the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2 through the connecting flange 4.

[0033] In this embodiment, refer to Figure 1 and Figure 2 The connecting flange 4 may be a flat rectangular parallelepiped structure, and the number of the connecting flanges 4 may preferably be four. Any two connecting flanges 4 are attached to the two side walls opposite to the bottom connection of the first connecting rod 1 at the opening of the third connecting rod 3, and the other two connecting flanges 4 are attached to the two side walls opposite to the bottom connection of the second connecting rod 2 at the opening of the third connecting rod 3. A plurality of bolts (known in the art) are installed on the connecting flange 4, and the connecting flange 4 can detachably connect the third connecting rod 3 to the first connecting rod 1 and the third connecting rod 3 to the second connecting rod 2 respectively through the plurality of bolts.

[0034] Preferably, in order to improve the connection tightness between the third connecting rod 3 and the first connecting rod 1, and between the third connecting rod 3 and the second connecting rod 2, as Figure 1 and Figure 2 As shown, the number of bolts installed on each connecting flange 4 may preferably be eight, and may be evenly arranged at both ends of the connecting flange 4 along the length direction of the connecting flange 4 .

[0035] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 The top end of the first connecting rod 1 (i.e., the end of the first connecting rod 1 away from the third connecting rod 3) is installed with a clamping mechanism, and the top end of the second connecting rod 2 (i.e., the end of the second connecting rod 2 away from the third connecting rod 3) is installed with a back plate 13 (refer to Fig. 9 and Fig.10 The clamping mechanism is arranged corresponding to the back plate 13. The clamping mechanism can be used to clamp the stringers 15 at the annular seam of the barrel section 14. The back plate 13 can be used to clamp the side wall of the barrel section 14 away from the stringers 15. Therefore, the back plate 13 and the clamping mechanism can apply a clamping force at both ends of the barrel section 14 to clamp the stringers 15 and the barrel section 14 (refer to Fig.13 and Fig.15 ).

[0036] Reference Figure 13-15When it is necessary to weld the stringers 15 at the annular seam of the barrel section 14 of the rocket tank, the clamping mechanism can be pressed on the stringers 15 at the annular seam of the barrel section 14, and at the same time, the back plate 13 can be pressed on the back side of the barrel section 14 corresponding to the stringers 15 at the annular seam of the barrel section 14, so as to clamp the annular seam of the barrel section 14 and the stringers 15, thereby ensuring that the annular seam of the barrel section 14 and the stringers 15 can be tightly fitted. When the stringers 15 are subsequently welded to the barrel section 14, the clamping force of the clamping mechanism and the back plate 13 on the annular seam of the barrel section 14 and the stringers 15 can avoid radial shrinkage at the annular seam of the barrel section 14, so that the annular seam of the barrel section 14 and the stringers 15 can be kept in a tightly fitted state during the welding process, ensuring the smooth welding of the rocket tank and the stringers.

[0037] In this embodiment, any equipment other than spot welding equipment that is suitable for welding the barrel segment 14 and the stringer 15 and does not increase the flow process in the entire rocket tank production process can be used. For example, laser welding equipment known in the art can be used, and no special limitation is made here.

[0038] Since the clamping mechanism and the back plate 13 can clamp the annular seam of the barrel section 14 and the stringer 15, the annular seam of the barrel section 14 and the stringer 15 can be kept in a tightly fitted state during the welding process, thereby avoiding the use of spot welding equipment and thus not increasing the circulation flow of spot welding equipment in the entire rocket tank production process, thereby improving the overall production efficiency of the rocket tank.

[0039] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 The clamping mechanism includes a clamping rod 9 slidably mounted on the top end of the first connecting rod 1. Figure 3 and Figure 4 A clamping block 10 is installed at one end of the clamping rod 9 close to the back plate 13 . The clamping block 10 is arranged corresponding to the back plate 13 . The clamping block 10 is used to clamp the web of the beam 15 at the annular seam of the barrel section 14 .

[0040] In this embodiment, refer to Figure 5 and Figure 6 , Figure 5 and Figure 6 All of them are schematic diagrams of the overall structure of the clamping mechanism of the present invention. Among them, the clamping rod 9 can be preferably a cylindrical structure, and the clamping block 10 is away from one end of the clamping rod 9 (i.e. Figure 5 A clamping groove may be provided on the left side of the middle clamping block 10 along the length direction of the beam 15, and the clamping groove is adapted to the shape of the web of the beam 15.

[0041] When the clamping block 10 is pressed on the web of the beam 15, the clamping groove can limit the connection between the clamping block 10 and the beam 15, and make the connection between the two more tightly, thereby avoiding the relative sliding between the clamping block 10 and the beam 15, and further ensuring the stability of the clamping block 10 when clamping the beam 15.

[0042] In this embodiment, refer to Figure 1 and Figure 2 The pressing rod 9 can penetrate and be slidably connected to the top end of the first connecting rod 1, thereby achieving a sliding connection with the first connecting rod 1.

[0043] In this embodiment, refer to Figure 4 and Figure 6 The pressing rod 9 is installed at the center of the pressing block 10, and the two can be detachably connected by bolts.

[0044] Through the setting of the bolts, when it is necessary to compress the girders 15 of different widths (i.e. different web heights), the bolts connecting the clamping rod 9 and the clamping block 10 can be removed, and the adapted clamping block 10 can be installed on the clamping rod 9 by bolts to realize quick disassembly and replacement of the clamping block 10.

[0045] According to one embodiment of the present invention, referring to Figure 1 , Figure 2 , Figure 5 and Figure 6 The top end of the first connecting rod 1 is also threadedly connected with a lead screw 7, which is located on one side of the clamping rod 9 and is arranged parallel to the clamping rod 9.

[0046] In this embodiment, refer to Figure 1 and Figure 2 , the lead screw 7 can be located directly below the pressing rod 9.

[0047] According to one embodiment of the present invention, referring to Figure 1 , Figure 2 , Figure 5 and Figure 6 A rotating block 16 is installed at one end of the lead screw 7 away from the first connecting rod 1 , and one end of the rotating block 16 close to the first connecting rod 1 contacts and cooperates with one end of the clamping rod 9 away from the first connecting rod 1 .

[0048] In this embodiment, refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The rotating block 16 may preferably be a cylindrical structure, and it may be coaxially arranged with the lead screw 7 (ie, the central axis of the rotating block 16 of the cylindrical structure is arranged colinearly with the central axis of the lead screw 7).

[0049] Since the end of the rotating block 16 close to the first connecting rod 1 is in contact with the end of the clamping rod 9 away from the first connecting rod 1, when the rotating block 16 is rotated to drive the screw 7 to rotate, the screw 7 will gradually be screwed into the first connecting rod 1. At this time, the rotating block 16 will press the clamping rod 9 and move the clamping rod 9 toward the direction close to the beam 15, so that the clamping block 10 can be pressed on the web of the beam 15, thereby realizing the clamping of the beam 15 by the back plate 13 and the clamping block 10.

[0050] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 The end of the clamping rod 9 away from the first connecting rod 1 is fixedly mounted with a connecting block 8 (refer to Fig.11 and Fig.12 ), one end of the rotating block 16 close to the first connecting rod 1 is in contact and fit with one end of the connecting block 8 away from the first connecting rod 1.

[0051] In this embodiment, the connection method between the clamping rod 9 and the connecting block 8 is not particularly limited, and the clamping rod 9 and the connecting block 8 can be connected by welding as known in the art to fix the clamping rod 9 and the connecting block 8. At this time, the rotating block 16 is no longer in contact with the end of the clamping rod 9 away from the first connecting rod 1, but in contact with the end of the connecting block 8 away from the first connecting rod 1. When the lead screw 7 is gradually screwed into the first connecting rod 1, the rotating block 16 will press the connecting block 8 and drive the connecting block 8 to move. Because the connecting block 8 and the clamping rod 9 are fixedly connected, the movement of the connecting block 8 will drive the clamping rod 9 to move in the direction close to the beam 15, so that the clamping block 10 can be pressed on the web of the beam 15, so that the back plate 13 and the clamping block 10 can clamp the beam 15.

[0052] According to one embodiment of the present invention, the lead screw 7 passes through the connecting block 8 and is slidably engaged with the connecting block 8 .

[0053] In this embodiment, refer to Fig.11 and Fig.12 Two through holes are provided in the vertical direction on the connecting block 8 , the upper through hole is used for fixed connection with the clamping rod 9 , and the lower through hole is used for sliding cooperation with the lead screw 7 .

[0054] In one embodiment of the present invention, by setting the lead screw 7 to pass through the connection block 8 and to slide with the connection block 8, the lead screw 7 can be further limited, thereby making the lead screw 7 more stable during the rotation process. At the same time, since both the lead screw 7 and the clamping rod 9 pass through the connection block 8, the above setting can also prevent the connection block 8 from rotating, thereby preventing the clamping rod 9 from rotating during the process of moving close to the beam 15, thereby ensuring the smooth progress of the clamping work.

[0055] According to one embodiment of the present invention, referring to Figure 5 and Figure 6 The pressing block 10 is provided with two sets of auxiliary pressing members, which are respectively arranged at both ends of the pressing block 10 and arranged along the length direction of the stringer 15. The auxiliary pressing members are used to press the flange plate of the stringer 15 at the annular seam of the barrel section 14. Preferably, referring to Figure 5 and Figure 6 Each set of auxiliary clamping parts includes a plurality of clamping bolts 11 arranged in sequence along the length direction of the beam 15 . The clamping bolts 11 are threadedly connected to the clamping block 10 . The clamping bolts 11 are used to clamp the flange plate of the beam 15 at the annular seam of the barrel section 14 .

[0056] In this embodiment, refer to Fig.13 and Fig.14 The number of each group of clamping bolts 11 can be four, that is, the number of the clamping bolts 11 installed on the clamping block 10 can be eight, and each group of four clamping bolts 11 are evenly arranged in sequence along the length direction of the beam 15.

[0057] Since the stringer 15 has a web and flanges on both sides (known in the art), the clamping block 10 is pressed on the web of the stringer 15 instead of on the flanges of the stringer 15. The end of the clamping bolt 11 close to the barrel section 14 can be pressed on the flange of the stringer 15, thereby achieving a better clamping effect between the stringer 15 and the barrel section 14.

[0058] In addition, since the clamping bolt 11 and the clamping block 10 are threadedly matched, when the beams 15 of different widths (i.e., different web heights) are clamped, the clamping bolt 11 can be rotated on the clamping block 10, and then the height of the threaded portion of the clamping bolt 11 protruding from the clamping block 10 can be adjusted, so that the beams 15 of different thicknesses can be adapted, thereby improving adaptability and clamping efficiency.

[0059] According to one embodiment of the present invention, referring to Figure 5 and Figure 6 A limiting nut 12 is threadedly installed on the lead screw 7, and the limiting nut 12 is located between the first connecting rod 1 and the connecting block 8; in the process of the clamping mechanism clamping the beam 15 at the annular seam of the barrel section 14, the limiting nut 12 does not contact the first connecting rod 1, that is, when the rotating block 16 moves while pressing the connecting block 8, the limiting nut 12 will not contact the side wall of the first connecting rod 1, and thus will not block the process of the lead screw 7 being screwed into the first connecting rod 1, thereby ensuring the smooth progress of the clamping work.

[0060] When the lead screw 7 has not yet been screwed into the first connecting rod 1, the limiting nut 12 can prevent the lead screw 7 from falling off from the connecting block 8, thereby ensuring the smooth progress of the pressing work.

[0061] After the welding of the barrel section 14 and the beam 15 is completed, it is necessary to remove the clamping block 10 and the clamping bolt 11 from the beam 15 and push it outward (i.e. Figure 5 The right side in the figure pulls the rotating block 16, at which time the limiting nut 12 will abut against the connecting block 8, and the connecting block 8 and the clamping rod 9 can be moved outward at the same time under the abutment of the limiting nut 12, so that the clamping block 10 and the clamping bolt 11 can be easily removed from the beam 15, and there is no need to hold the connecting block 8 again to remove the clamping block 10 and the clamping bolt 11 from the beam 15, thereby improving work efficiency.

[0062] According to one embodiment of the present invention, referring to Figure 5 and Figure 6 A rotating handle 6 is installed on the rotating block 16.

[0063] In this embodiment, refer to Figure 5 and Figure 6 , a rotating handle 6 is installed to penetrate the rotating block 16, and the rotating handle 6 can be detachably connected to the rotating block 16 by bolts. Preferably, the rotating handle 6 and the rotating block 16 are arranged in a vertical direction.

[0064] Rotating the handle 6 can increase the torque on the rotating block 16 by utilizing the axle (lever) principle, thereby increasing the pressing force of the pressing block 10 on the beam 15, further ensuring the close fit between the barrel section 14 and the beam 15 at the annular seam.

[0065] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 A handle 5 is detachably mounted on the first connecting rod 1 via bolts.

[0066] In this embodiment, refer to Figure 1 and Figure 2 The handle 5 may preferably be in a C-shape. By providing the handle 5, the clamping device of the present invention can be grasped more conveniently.

[0067] Example 2 In this embodiment, refer to Figure 13-15 Since the lengths of the first connecting rod 1 and the second connecting rod 2 are limited, the clamping device of the present invention can be suitable for clamping work of a barrel section 14 with a shorter length.

[0068] Since the first connecting rod 1 and the third connecting rod 3, and the second connecting rod 2 and the third connecting rod 3 are all detachably connected via the connecting flange 4, when the length of the barrel section 14 between the first connecting rod 1 and the second connecting rod 2 is long, the third connecting rod 3 can be disassembled, and the first connecting rod 1 and the second connecting rod 2 can be respectively installed on an external support frame (known in the art), so that the clamping device of the present invention can be used to clamp the beam 15 at a farther distance of the barrel section 14 with a longer length. Among them, the first connecting rod 1 and the second connecting rod 2 can also be connected to the external support frame via the connecting flange 4 of the present invention.

[0069] The above-mentioned embodiments of the present invention can be combined with each other and have corresponding technical effects.

[0070] 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 clamping device for welding rocket tank barrel sections and stringers, characterized in that: It comprises a first connecting rod (1), a second connecting rod (2), a third connecting rod (3) and a pressing mechanism, wherein: The first connecting rod (1) is located on one side of the second connecting rod (2) and is arranged parallel to the second connecting rod (2); The third connecting rod (3) is located below the first connecting rod (1) and the second connecting rod (2), and two ends of the third connecting rod (3) are detachably connected to the bottom end of the first connecting rod (1) and the bottom end of the second connecting rod (2) respectively; A clamping mechanism is installed at the top end of the first connecting rod (1), and a back plate (13) is installed at the top end of the second connecting rod (2). The clamping mechanism and the back plate (13) are arranged correspondingly, and the clamping mechanism is used to clamp the stringers (15) at the annular seam of the barrel section (14), and the back plate (13) is used to clamp the side wall of the barrel section (14) at one end away from the stringers (15).

2. The clamping device for welding rocket tank barrel sections and stringers according to claim 1 is characterized in that: The clamping mechanism comprises a clamping rod (9) slidably mounted on the top end of the first connecting rod (1), a clamping block (10) being mounted on one end of the clamping rod (9) close to the back plate (13), the clamping block (10) being arranged corresponding to the back plate (13), and the clamping block (10) being used to clamp the web of the stringer (15) at the annular seam of the barrel section (14); A lead screw (7) is also threadedly connected to the top end of the first connecting rod (1), and the lead screw (7) is located on one side of the clamping rod (9) and is arranged parallel to the clamping rod (9); a rotating block (16) is installed at one end of the lead screw (7) away from the first connecting rod (1), and one end of the rotating block (16) close to the first connecting rod (1) is in contact with the end of the clamping rod (9) away from the first connecting rod (1).

3. The clamping device for welding rocket tank barrel sections and stringers according to claim 2 is characterized in that: A connecting block (8) is mounted on one end of the clamping rod (9) away from the first connecting rod (1), and an end of the rotating block (16) close to the first connecting rod (1) is in contact with an end of the connecting block (8) away from the first connecting rod (1).

4. The clamping device for welding rocket tank barrel sections and stringers according to claim 3 is characterized in that: The lead screw (7) passes through the connecting block (8) and is slidably engaged with the connecting block (8).

5. The clamping device for welding rocket tank barrel sections and stringers according to claim 2 is characterized in that: An auxiliary pressing piece is installed on the pressing block (10), the auxiliary pressing piece is arranged at both ends of the pressing block (10) and along the length direction of the stringer (15), and the auxiliary pressing piece is used to press the flange plate of the stringer (15) at the annular seam of the barrel section (14).

6. The clamping device for welding rocket tank barrel sections and stringers according to claim 5 is characterized in that: The auxiliary clamping member comprises a plurality of clamping bolts (11) arranged in sequence along the length direction of the stringer (15), the clamping bolts (11) being threadedly connected to the clamping block (10), and the clamping bolts (11) being used to clamp the flange plate of the stringer (15) at the annular seam of the barrel section (14).

7. The clamping device for welding rocket tank barrel sections and stringers according to claim 1 is characterized in that: The third connecting rod (3) is a U-shaped structure, and the two ends of the opening of the third connecting rod (3) are respectively connected to the bottom end of the first connecting rod (1) and the bottom end of the second connecting rod (2).

8. The clamping device for welding rocket tank barrel sections and stringers according to claim 7 is characterized in that: A connecting flange (4) is provided between the third connecting rod (3) and the first connecting rod (1), and between the third connecting rod (3) and the second connecting rod (2); the two ends of the opening of the third connecting rod (3) are detachably connected to the bottom end of the first connecting rod (1) and the bottom end of the second connecting rod (2) respectively through the connecting flange (4).

9. The clamping device for welding rocket tank barrel sections and stringers according to claim 4 is characterized in that: A limit nut (12) is threadedly mounted on the lead screw (7), and the limit nut (12) is located between the first connecting rod (1) and the connecting block (8); during the process in which the clamping mechanism clamps the stringer (15) at the annular seam of the barrel section (14), the limit nut (12) does not contact the first connecting rod (1).

10. The clamping device for welding rocket tank barrel sections and stringers according to claim 2, characterized in that: A rotating handle (6) is mounted on the rotating block (16).

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