A clamping device for welding a rocket tank cylinder segment and a stringer

Abstract

The application discloses a clamping device for welding a rocket storage tank cylinder section and a stringer, which comprises a first connecting rod, a second connecting rod, a third connecting rod and a pressing mechanism, wherein the first connecting rod is arranged on one side of the second connecting rod and parallel to the second connecting rod. The third connecting rod is arranged 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 respectively. The top end of the first connecting rod is provided with the pressing mechanism, the top end of the second connecting rod is provided with a back plate, the pressing mechanism is arranged correspondingly with the back plate, and the pressing mechanism is used for pressing the stringer at the ring joint of the cylinder section. The application can avoid the radial inward shrinkage of the ring joint of the cylinder section during the welding process, ensure the smooth welding of the rocket storage tank and the stringer, avoid the use of spot welding equipment, and improve the overall production efficiency of the rocket storage tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rocket tank, in particular to a clamping device for welding a rocket tank cylinder segment and a stringer. BACKGROUND

[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 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 cylinder segment, for example, to weld stringers on the inner wall and outer wall of the rocket tank along the axial direction to improve the overall structural strength of the rocket tank. However, when laser welding is used to weld stringers on the rocket tank with thin wall thickness, the cylinder segment is stacked by several cylinder segments welded by girth seams, so that the girth seam of the cylinder segment will be radially contracted due to the heat effect of laser welding, which will cause the girth seam of the cylinder segment to be not tightly fitted with the stringer, and thus the stringer cannot be welded with the rocket tank.

[0004] The traditional method to solve the problem of not tight fitting between the girth seam of the cylinder segment and the stringer is to place the girth seam of the cylinder segment and the stringer between the two electrodes of the spot welding equipment by means of the spot welding equipment, and to clamp the two electrodes by external clamping force, so as to make the stringer tightly fitted with the girth seam of the cylinder segment. However, since this method uses the spot welding equipment, it increases the flow process of the spot welding equipment in the whole production process of the rocket tank, thereby reducing the overall production efficiency of the rocket tank.

[0005] Therefore, how to make the girth seam of the cylinder segment tightly fitted with the stringer to ensure the smooth welding of the rocket tank and the stringer, and at the same time improve the overall production efficiency of the rocket tank, has become a problem to be solved. SUMMARY

[0006] The purpose of the present application is to provide a clamping device for welding a rocket tank cylinder segment and a stringer to solve the problems existing in the prior art.

[0007] To achieve the above purpose, the present application provides the following solutions:

[0008] The present application provides a clamping device for welding a rocket tank cylinder segment and a stringer, comprising a first connecting rod, a second connecting rod, a third connecting rod and a pressing mechanism, wherein:

[0009] The first connecting rod is located on one side of the second connecting rod and is arranged in parallel with the second connecting rod;

[0010] 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 with the bottom end of the first connecting rod and the bottom end of the second connecting rod, respectively.

[0011] A pressing mechanism is mounted at the top end of the first connecting rod, a back plate is mounted at the top end of the second connecting rod, the pressing mechanism is correspondingly arranged with the back plate, the pressing mechanism is used for pressing the web of the girt at the ring joint of the cylinder segment, and the back plate is used for pressing the end side wall of the cylinder segment away from the girt.

[0012] According to an embodiment of the present application, the pressing mechanism comprises a pressing rod slidingly mounted at the top end of the first connecting rod, a pressing block is mounted at one end of the pressing rod close to the back plate, the pressing block is correspondingly arranged with the back plate, and the pressing block is used for pressing the web of the girt at the ring joint of the cylinder segment.

[0013] A lead screw is threadedly connected at the top end of the first connecting rod, the lead screw is located at one side of the pressing rod and is arranged in parallel with the pressing rod, a rotating block is mounted at one end of the lead screw 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 pressing rod away from the first connecting rod.

[0014] According to an embodiment of the present application, one end of the pressing rod away from the first connecting rod is provided with a connecting block, 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.

[0015] According to an embodiment of the present application, the lead screw penetrates through the connecting block and is slidingly matched with the connecting block.

[0016] According to an embodiment of the present application, an auxiliary pressing member is mounted on the pressing block, the auxiliary pressing member is arranged at two ends of the pressing block and is arranged along the length direction of the girt, and the auxiliary pressing member is used for pressing the flange plate of the girt at the ring joint of the cylinder segment.

[0017] According to an embodiment of the present application, the auxiliary pressing member comprises a plurality of pressing bolts arranged in sequence along the length direction of the girt, the pressing bolts are threadedly connected with the pressing block, and the pressing bolts are used for pressing the flange plate of the girt at the ring joint of the cylinder segment.

[0018] According to an embodiment of the present application, the third connecting rod is in a U-shaped structure, and two ends of the opening of the third connecting rod are connected with the bottom end of the first connecting rod and the bottom end of the second connecting rod, respectively.

[0019] According to one embodiment of the present application, a connecting flange is arranged 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 third connecting rod are detachably connected with the bottom end of the first connecting rod and the bottom end of the second connecting rod through the connecting flanges.

[0020] According to one embodiment of the present application, a limiting nut is threadedly mounted on the lead screw and located between the first connecting rod and the connecting block; during the process of the pressing mechanism pressing the stringer at the ring joint of the cylinder segment, the limiting nut does not contact the first connecting rod.

[0021] According to one embodiment of the present application, a rotating handle is mounted on the rotating block.

[0022] The present application has at least the following technical effects:

[0023] The present application provides a clamping device for welding a rocket storage tank cylinder segment and a stringer. The clamping device can clamp the stringer and the cylinder segment at the ring joint and make the stringer and the cylinder segment at the ring joint closely fit, thereby avoiding the radial inward shrinkage of the ring joint of the cylinder segment during the welding process and ensuring the smooth progress of the welding work of the rocket storage tank and the stringer.

[0024] The clamping device can clamp the stringer and the cylinder segment at the ring joint, thereby avoiding the use of spot welding equipment and not increasing the flow process of the spot welding equipment in the whole production process of the rocket storage tank, and improving the overall production efficiency of the rocket storage tank. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0027] Figure 2 It is Figure 1 It is a schematic diagram of the overall structure from another angle;

[0028] Figure 3 It is Figure 1 It is a partial enlarged view of position A in FIG. 6;

[0029] Figure 4 It is Figure 2 It is a partial enlarged view of position B in FIG. 6;

[0030] Figure 5 The overall structure schematic diagram of the pressing mechanism in the application;

[0031] Figure 6 The overall structure schematic diagram of the pressing mechanism in the application; Figure 5 The overall structure schematic diagram of the pressing mechanism in the application;

[0032] Figure 7 The overall structure schematic diagram of the pressing mechanism in the application;

[0033] Figure 8 The overall structure schematic diagram of the pressing mechanism in the application; Figure 7 The overall structure schematic diagram of the pressing mechanism in the application;

[0034] Figure 9 The overall structure schematic diagram of the pressing mechanism in the application;

[0035] Figure 10 The overall structure schematic diagram of the pressing mechanism in the application; Figure 9 The overall structure schematic diagram of the pressing mechanism in the application;

[0036] Figure 11 The overall structure schematic diagram of the pressing mechanism in the application;

[0037] Figure 12 The overall structure schematic diagram of the pressing mechanism in the application; Figure 11 The overall structure schematic diagram of the pressing mechanism in the application;

[0038] Figure 13 The overall structure schematic diagram of the pressing mechanism in the application;

[0039] Figure 14 The overall structure schematic diagram of the pressing mechanism in the application; Figure 13 The overall structure schematic diagram of the pressing mechanism in the application;

[0040] Figure 15 The overall structure schematic diagram of the pressing mechanism in the application; Figure 13 The overall structure schematic diagram of the pressing mechanism in the application;

[0041] Wherein, 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 rod; 8, the connecting block; 9, the pressing rod; 10, the pressing block; 11, the pressing bolt; 12, the limiting nut; 13, the back plate; 14, the cylinder segment; 15, the stringer; 16, the rotating block. DETAILED DESCRIPTION

[0042] The features and exemplary embodiments of the various aspects of the present application will be described below in detail, in order to make the purposes, technical solutions and advantages of the present application more clear. The following, in combination with the accompanying drawings and specific embodiments, will further describe the present application in detail. It should be understood that the specific embodiments described herein are configured only to explain the present application, for exemplary illustration of the principles of the present application, and are not configured to limit the present application. In addition, the components in the drawings are not necessarily drawn to scale. For example, the size of some components or regions in the drawings can be enlarged for other components or regions to help understand the embodiments of the present application.

[0043] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the embodiments of the present application. In the description of the present application, it should be noted that, unless otherwise specified, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In addition, the terms "including", "containing", "having" or any other variants thereof are intended to cover non-exclusive inclusion, so that the inclusion of a series of element structures or components not only includes those elements, but also includes other elements not explicitly listed or inherent in the structure, component. Without more limitation, the elements defined by the statement "including" do not exclude the presence of other identical elements in the article or device including the elements.

[0045] Spatial relationship terms such as "below", "under", "lower", "above", "upper", "on", "higher", etc. are used for convenience of description to explain the position of one element relative to the second element, and these terms are intended to cover different orientations of the device, except for the orientations different from those shown in the drawings. In addition, for example, "one element is on / under 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 are not intended to specifically refer to order or sequence, and should not be regarded as limiting. Similar terms represent similar elements throughout the description.

[0046] In the following description of the present invention, the terms "rocket," "launch vehicle," "spacecraft," "space launch vehicle," or "missile" may be used in certain scenarios for ease of description only, and their connotations are not limited to the specific terms used. Generally, the launch vehicle of the present invention includes space launch vehicles and rockets used to launch satellites, spacecraft, or other probes, as well as weapons such as missiles and rockets, and similar products capable of delivering payloads into the air. Those skilled in the art, when interpreting the above specific terms, should not limit the launch vehicle to only one of space launch vehicles, rockets, or missiles based on the specific terms used in the description, thereby narrowing the scope of protection of the present invention.

[0047] It will be apparent to those skilled in the art that the present invention can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0048] Example 1

[0049] This invention provides a clamping device for welding rocket propellant tank sections to stringers, as shown in the reference. Figure 1 and Figure 2 It includes a first connecting rod 1, a second connecting rod 2, a third connecting rod 3, and a clamping mechanism, wherein:

[0050] 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.

[0051] 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 cuboid structure.

[0052] 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., in...). Figure 1 The third connecting rod 3 is located below the first connecting rod 1 and the second connecting rod 2, and both ends of the third connecting rod 3 are respectively connected to the bottom end of the first connecting rod 1 (i.e., at...). Figure 1 The bottom end of the first connecting rod 1) and the bottom end of the second connecting rod 2 (i.e., at the bottom end of the first connecting rod 1) Figure 1 The bottom end of the second connecting rod 2 is detachably connected to connect the first connecting rod 1 and the second connecting rod 2.

[0053] In this embodiment, refer to Figure 1 and Figure 2 The third connecting rod 3 can preferably be a U-shaped structure, and the cross-section of the third connecting rod 3 can preferably be a rectangular structure.

[0054] In the present embodiment, with reference to Figure 1 and Figure 2 , the two ends of the opening of the third connecting rod 3 are connected with the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2 respectively. Preferably, the top ends of the two ends of the opening of the third connecting rod 3 (i.e. the opening of the U-shaped structure) are connected with the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2 respectively. 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 as to better connect with the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2.

[0055] According to an embodiment of the present application, with reference to Figure 1 and Figure 2 , the third connecting rod 3 is provided with a connecting flange 4 between the first connecting rod 1 and the second connecting rod 2, and the two ends of the opening of the third connecting rod 3 are detachably connected with the bottom end of the first connecting rod 1 and the bottom end of the second connecting rod 2 through the connecting flange 4.

[0056] In the present embodiment, with reference to Figure 1 and Figure 2 , the connecting flange 4 can be a flat cuboid structure, and the number of connecting flanges 4 can be preferably four. Among them, any two connecting flanges 4 are attached to the two side walls opposite the connecting position of the opening of the third connecting rod 3 and the bottom end of the first connecting rod 1, and the other two connecting flanges 4 are attached to the two side walls opposite the connecting position of the opening of the third connecting rod 3 and the bottom end of the second connecting rod 2. A plurality of bolts (known in the art) are installed on the connecting flange 4, and the connecting flange 4 can be detachably connected with the first connecting rod 1 and the second connecting rod 2 through the plurality of bolts respectively.

[0057] Preferably, in order to improve the connection fastening 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 shown in Figure 1 and Figure 2 , the number of bolts installed on each connecting flange 4 can be preferably eight, and can be evenly arranged at both ends of the connecting flange 4 along the length direction of the connecting flange 4.

[0058] According to an embodiment of the present application, with reference 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 provided with a pressing 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 provided with a back plate 13 (with reference to Figure 9 and Figure 10). The pressing mechanism is arranged corresponding to the back plate 13, and the pressing mechanism can be used to press the stringer 15 at the girth joint of the cylinder segment 14, and the back plate 13 can be used to press the end side wall of the cylinder segment 14 away from the stringer 15, so that the back plate 13 and the pressing mechanism can respectively exert pressing force on both ends of the cylinder segment 14 to clamp the stringer 15 and the cylinder segment 14 (for reference Figure 13 and Figure 15 ).

[0059] For reference Figures 13-15 When it is necessary to weld the stringer 15 at the girth joint of the cylinder segment 14 of the rocket tank, the pressing mechanism can be pressed on the stringer 15 at the girth joint of the cylinder segment 14, and the back plate 13 can be pressed on the back of the cylinder segment 14 corresponding to the stringer 15 at the girth joint of the cylinder segment 14, so as to clamp the girth joint of the cylinder segment 14 and the stringer 15, thereby ensuring that the girth joint of the cylinder segment 14 and the stringer 15 can be tightly fitted. When the stringer 15 is subsequently welded on the cylinder segment 14, the clamping force of the pressing mechanism and the back plate 13 on the girth joint of the cylinder segment 14 and the stringer 15 can avoid the girth joint of the cylinder segment 14 from being radially retracted, so that the girth joint of the cylinder segment 14 and the stringer 15 can be in a tightly fitted state during welding, and the welding work of the rocket tank and the stringer can be smoothly carried out.

[0060] In the embodiment, any device suitable for welding the cylinder segment 14 and the stringer 15 without increasing the flow process of the entire rocket tank production process can be used in addition to the spot welding device, for example, a laser welding device known in the art can be used, which is not particularly limited here.

[0061] Since the pressing mechanism and the back plate 13 can clamp the girth joint of the cylinder segment 14 and the stringer 15, the girth joint of the cylinder segment 14 and the stringer 15 can be in a tightly fitted state during welding, thereby avoiding the use of the spot welding device, and further avoiding increasing the flow process of the spot welding device in the entire rocket tank production process, and improving the overall production efficiency of the rocket tank.

[0062] According to an embodiment of the present application, for reference Figure 1 and Figure 2 , the pressing mechanism comprises a pressing rod 9 slidingly installed at the top end of the first connecting rod 1. For reference Figure 3 and Figure 4 , the pressing rod 9 is installed with a pressing block 10 at the end close to the back plate 13, and the pressing block 10 is arranged corresponding to the back plate 13, and the pressing block 10 is used to press the web plate of the stringer 15 at the girth joint of the cylinder segment 14.

[0063] In the embodiment, for reference Figure 5 and Figure 6 , Figure 5 and Figure 6All are schematic diagrams of the overall structure of the pressing mechanism in the present application. Among them, the pressing rod 9 can be preferably cylindrical structure, the pressing block 10 far away from the end of the pressing rod 9 (i.e. Figure 5 The left side of the middle pressing block 10) can be provided with a clamping groove along the length direction of the stringer 15, and the clamping groove is matched with the web shape of the stringer 15.

[0064] When the pressing block 10 is pressed on the web of the stringer 15, the clamping groove can limit the connection between the pressing block 10 and the stringer 15, and make the connection more firm, thereby avoiding the relative sliding between the pressing block 10 and the stringer 15, and further ensuring the stability when the pressing block 10 presses the stringer 15.

[0065] In the embodiment, referring to Figure 1 and Figure 2 , the pressing rod 9 can be connected to the top end of the first connecting rod 1 in a sliding manner.

[0066] In the embodiment, referring to Figure 4 and Figure 6 , the pressing rod 9 is installed at the center position of the pressing block 10, and the two can be detachably connected by bolts.

[0067] Through the setting of the bolt, when the stringer 15 with different widths (i.e. different web heights) needs to be pressed, the bolt connecting the pressing rod 9 and the pressing block 10 can be disassembled, and the matched pressing block 10 can be installed on the pressing rod 9 through the bolt, so as to realize the quick disassembly and replacement of the pressing block 10.

[0068] According to an embodiment of the present application, 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, and the lead screw 7 is located on one side of the pressing rod 9 and is arranged in parallel with the pressing rod 9.

[0069] In the embodiment, referring to Figure 1 and Figure 2 , the lead screw 7 can be located directly below the pressing rod 9.

[0070] According to an embodiment of the present application, referring to Figure 1 , Figure 2 , Figure 5 and Figure 6 , the end of the lead screw 7 away from the first connecting rod 1 is provided with a rotating block 16, and the end of the rotating block 16 close to the first connecting rod 1 is in contact with the end of the pressing rod 9 away from the first connecting rod 1.

[0071] In the embodiment, referring toFigure 1 、 Figure 2 、 Figure 5 and Figure 6 The rotating block 16 can preferably be a cylindrical structure, and it can be coaxially arranged with the lead screw 7 (i.e., the central axis of the cylindrical rotating block 16 is arranged in line with the central axis of the lead screw 7).

[0072] Since the rotating block 16 is in contact with the end of the pressing rod 9 away from the first connecting rod 1, when the rotating block 16 is rotated to drive the lead screw 7 to rotate, the lead screw 7 will gradually screw into the first connecting rod 1, at which time the rotating block 16 will press against the pressing rod 9 and move the pressing rod 9 toward the direction close to the stringer 15, thereby pressing the pressing block 10 against the web of the stringer 15 to achieve clamping of the stringer 15 by the back plate 13 and the pressing block 10.

[0073] According to one embodiment of the present application, referring to Figure 1 and Figure 2 The end of the pressing rod 9 away from the first connecting rod 1 is fixedly mounted with a connecting block 8 (referring to Figure 11 and Figure 12 The end of the rotating block 16 close to the first connecting rod 1 is in contact with the end of the connecting block 8 away from the first connecting rod 1.

[0074] In this embodiment, the connection between the pressing rod 9 and the connecting block 8 is not particularly limited, and can be connected by welding known in the art to fixedly connect the pressing rod 9 and the connecting block 8. At this time, the rotating block 16 is no longer in contact with the end of the pressing rod 9 away from the first connecting rod 1, but is in contact with the end of the connecting block 8 away from the first connecting rod 1. When the lead screw 7 gradually screws into the first connecting rod 1, the rotating block 16 will press against the connecting block 8 and drive the connecting block 8 to move, and because the connecting block 8 is fixedly connected with the pressing rod 9, the movement of the connecting block 8 will drive the pressing rod 9 to move toward the direction close to the stringer 15, thereby pressing the pressing block 10 against the web of the stringer 15 to achieve clamping of the stringer 15 by the back plate 13 and the pressing block 10.

[0075] According to one embodiment of the present application, the lead screw 7 penetrates through the connecting block 8 and is in sliding contact with the connecting block 8.

[0076] In this embodiment, referring to Figure 11 and Figure 12 Two through holes are formed in the connecting block 8 in the vertical direction, the upper through hole is used for fixedly connecting with the pressing rod 9, and the lower through hole is used for slidingly connecting with the lead screw 7.

[0077] ​​In one embodiment of the present application, the further limiting effect on the lead screw 7 can be achieved by penetrating the lead screw 7 through the connecting block 8 and slidingly fitting the lead screw 7 with the connecting block 8, so that the lead screw 7 can be more stable during rotation. At the same time, since the lead screw 7 and the pressing rod 9 are both penetrated through the connecting block 8 at this time, the above-mentioned arrangement can also avoid the rotation of the connecting block 8, thereby avoiding the rotation of the pressing rod 9 during the movement of the pressing rod 9 close to the stringer 15, and ensuring the smooth progress of the pressing work.

[0078] According to one embodiment of the present application, referring to Figure 5 and Figure 6 , the pressing block 10 is provided with two groups of auxiliary pressing members, which are arranged at both ends of the pressing block 10 and along the length direction of the stringer 15, and the auxiliary pressing members are used to press the flange plates of the stringer 15 at the girth seam of the cylinder segment 14. Preferably, referring to Figure 5 and Figure 6 , each group of auxiliary pressing members includes a plurality of pressing bolts 11 arranged along the length direction of the stringer 15, and the pressing bolts 11 are threadedly connected with the pressing block 10, and the pressing bolts 11 are used to press the flange plates of the stringer 15 at the girth seam of the cylinder segment 14.

[0079] In the present embodiment, referring to Figure 13 and Figure 14 , the number of each group of pressing bolts 11 can be four, i.e. the number of the pressing bolts 11 mounted on the pressing block 10 can be eight, and the four pressing bolts 11 of each group are arranged along the length direction of the stringer 15 in sequence and uniformly.

[0080] Since the stringer 15 has a web plate and flange plates on both sides (known in the art), the pressing block 10 is pressed on the web plate of the stringer 15, rather than the flange plates of the stringer 15. The end of the pressing bolt 11 close to the cylinder segment 14 can be pressed on the flange plate of the stringer 15, so that the pressing effect of the stringer 15 and the cylinder segment 14 is better.

[0081] In addition, since the pressing bolt 11 is threadedly fitted with the pressing block 10, when pressing the stringer 15 with different widths (i.e. different web plate heights), the pressing bolt 11 can be rotated in the pressing block 10, so that the height of the threaded part of the pressing bolt 11 protruding from the pressing block 10 can be adjusted, thereby adapting to stringers 15 with different thicknesses, improving the adaptability and the pressing efficiency.

[0082] According to one embodiment of the present application, referring to Figure 5 and Figure 6The limiting nut 12 is threadedly mounted on the screw rod 7 and is located between the first connecting rod 1 and the connecting block 8. During the process of pressing the stringer 15 at the ring joint of the cylinder segment 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 does not contact the sidewall of the first connecting rod 1, thereby not blocking the process of screwing the screw rod 7 into the first connecting rod 1, and ensuring the smooth progress of the pressing work.

[0083] When the screw rod 7 has not been screwed into the first connecting rod 1, the limiting nut 12 can prevent the screw rod 7 from falling off the connecting block 8, thereby ensuring the smooth progress of the pressing work.

[0084] When the cylinder segment 14 and the stringer 15 are welded, the pressing block 10 and the pressing bolt 11 need to be removed from the stringer 15, the rotating block 16 is pulled outward (i.e., to the right in Figure 5 ), at this time, the limiting nut 12 abuts against the connecting block 8, and the connecting block 8 and the pressing rod 9 can be moved outward simultaneously under the abutment of the limiting nut 12, so that the pressing block 10 and the pressing bolt 11 can be conveniently removed from the stringer 15, without the need to hold the connecting block 8 again to remove the pressing block 10 and the pressing bolt 11 from the stringer 15, thereby improving the work efficiency.

[0085] According to one embodiment of the present application, referring to Figure 5 and Figure 6 , the rotating block 16 is provided with a rotating handle 6.

[0086] In the present embodiment, referring to Figure 5 and Figure 6 , the rotating handle 6 can be penetrated through the rotating block 16, and the rotating handle 6 can be detachably connected with the rotating block 16 through a bolt. Preferably, the rotating handle 6 is arranged in a perpendicular direction with the rotating block 16.

[0087] The rotating handle 6 can increase the torque of the rotating block 16 by using the wheel shaft (lever) principle, thereby improving the pressing force of the pressing block 10 on the stringer 15, and further ensuring the close fit of the cylinder segment 14 and the stringer 15 at the ring joint.

[0088] According to one embodiment of the present application, referring to Figure 1 and Figure 2 , the first connecting rod 1 is detachably provided with a handle 5 through a bolt.

[0089] In the present embodiment, referring to Figure 1 and Figure 2 , the handle 5 can be preferably C-shaped. Through the arrangement of the handle 5, the clamping device of the present application can be more conveniently held.

[0090] Embodiment 2

[0091] In this embodiment, reference is made to Figures 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 application can be applied to the clamping work of the shorter length of the cylinder segment 14.

[0092] 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 detachably connected through the connecting flange 4, when the length of the cylinder segment 14 between the first connecting rod 1 and the second connecting rod 2 is longer, the third connecting rod 3 can be detached, and the first connecting rod 1 and the second connecting rod 2 are respectively installed on the external support frame (known in the art), and then the clamping device of the present application can be used to clamp the longer length of the cylinder segment 14 at the farther distance of the stringer 15. Wherein, the first connecting rod 1 and the second connecting rod 2 can also be connected with the external support frame through the connecting flange 4 in the present application.

[0093] The above embodiments of the present application can be combined with each other, and have corresponding technical effects.

[0094] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A clamping device for welding rocket propellant tank sections to stringers, characterized in that, It includes a first connecting rod (1), a second connecting rod (2), a third connecting rod (3), and a clamping 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 the 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 of the first connecting rod (1), and a back plate (13) is installed at the top of the second connecting rod (2). The clamping mechanism is correspondingly arranged with the back plate (13). The clamping mechanism is used to clamp the stringer (15) at the circumferential joint of the cylindrical section (14), and the back plate (13) is used to clamp the side wall of the cylindrical section (14) away from the stringer (15). The clamping mechanism includes a clamping rod (9) slidably mounted on the top of the first connecting rod (1). A clamping block (10) is installed on one end of the clamping rod (9) near the back plate (13). The clamping block (10) is correspondingly arranged with the back plate (13). The clamping block (10) is used to clamp the web of the stringer (15) at the circumferential joint of the cylindrical section (14). An auxiliary clamping component is installed on the clamping block (10). The auxiliary clamping component is located at both ends of the clamping block (10) and is arranged along the length direction of the stringer (15). The auxiliary clamping component is used to clamp the flange plate of the stringer (15) at the circumferential joint of the cylinder section (14).

2. The clamping device for welding rocket propellant tank sections and stringers according to claim 1, characterized in that, The top end of the first connecting rod (1) is also threaded with a lead screw (7), which is located on one side of the clamping rod (9) and is parallel to the clamping rod (9); a rotating block (16) is installed at the end of the lead screw (7) away from the first connecting rod (1), and 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).

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

4. The clamping device for welding rocket propellant tank sections and stringers according to claim 3, characterized in that, The lead screw (7) passes through the connecting block (8) and slides with the connecting block (8).

5. The clamping device for welding rocket propellant tank sections and stringers according to claim 1, characterized in that, The auxiliary clamping component includes a number of clamping bolts (11) arranged sequentially along the length direction of the stringer (15). The clamping bolts (11) are threadedly connected to the clamping block (10). The clamping bolts (11) are used to clamp the flange of the stringer (15) at the circumferential joint of the cylindrical section (14).

6. The clamping device for welding rocket propellant tank sections and stringers according to claim 1, characterized in that, The third connecting rod (3) has 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).

7. The clamping device for welding rocket propellant tank sections and stringers according to claim 6, 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).

8. The clamping device for welding rocket propellant tank sections and stringers according to claim 4, characterized in that, A limiting nut (12) is threaded onto the lead screw (7). The limiting nut (12) is located between the first connecting rod (1) and the connecting block (8). During the process of the clamping mechanism pressing the stringer (15) at the circumferential seam of the cylinder section (14), the limiting nut (12) does not contact the first connecting rod (1).

9. The clamping device for welding rocket propellant tank 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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