CN111922506B - Thin-wall revolving body tightening device - Google Patents

Thin-wall revolving body tightening device Download PDF

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Publication number
CN111922506B
CN111922506B CN202010751672.1A CN202010751672A CN111922506B CN 111922506 B CN111922506 B CN 111922506B CN 202010751672 A CN202010751672 A CN 202010751672A CN 111922506 B CN111922506 B CN 111922506B
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section
driving device
linear driving
revolving body
thin
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CN111922506A (en
Inventor
霍晓静
胡改娟
张应宏
沈涌滨
李世鹏
蔺级申
陈博
陈家恒
关畅
侯家斌
金恩沛
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Beijing Jiutianxingge Aerospace Technology Co ltd
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Beijing Jiutianxingge Aerospace Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/1255Tools therefor, e.g. characterised by the shape of the probe
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/26Auxiliary equipment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Abstract

The invention provides a thin-wall revolving body tightening device, which comprises: centre frame and tightening mechanism. The center frame is provided with a first linear driving device. The quantity of the tightening mechanisms is multiple, and each tightening mechanism comprises a support rod, a connecting rod and a correcting block. The first section of the support rod can stretch relative to the second section of the support rod, the first section of the support rod is hinged with the center frame, one end of the connecting rod is hinged with the movable part of the first linear driving device, and the other end of the connecting rod is hinged with the first section of the support rod. The correction block is arranged at the second section of the support rod and comprises two arc-shaped blocks. The two arc blocks are respectively arranged on two sides of the support rod and are hinged with the support rod, and the device further comprises a driving mechanism for driving the arc blocks to rotate. The thin-wall revolving body tightening device can enter and exit a manhole of the rear bottom in a folded state, can be unfolded to tighten the inner wall of the rear bottom after entering the interior of the rear bottom, does not need to be detached and assembled in the whole process, can effectively save the processing time and improve the processing efficiency.

Description

Thin-wall revolving body tightening device
Technical Field
The invention relates to the technical field of large-scale thin-wall revolving body processing, in particular to a thin-wall revolving body tightening device.
Background
Most of fuel storage tanks of aerospace vehicles are large thin-wall revolved body structures, and are mainly composed of a front bottom 1, a rear bottom 3 and a plurality of cylinder sections 2, wherein the front bottom 1 and the rear bottom 3 can be spherical structures, ellipsoidal structures or conical structures, and the cylinder sections 2 are cylindrical structures, as shown in fig. 1. Two adjacent cylinder sections 2 and cylinder sections 2 are connected with the front bottom 1 or the rear bottom 3 in a welding mode, and because the thin-wall rotary body structure is large in diameter, small in wall thickness and poor in rigidity, tensioning devices are required to be arranged inside the cylinder sections and the front bottom and the rear bottom in the welding process so as to keep the roundness, the outline dimension and the like of the welding end face of each component within an allowable error range. In the prior art, a manhole (manual work generally refers to a through hole which is coaxially arranged with a revolving body and is formed in the front bottom or the rear bottom) of a thin-wall revolving body structure is arranged on the front bottom or the rear bottom of the thin-wall revolving body structure for workers to go in and out, when the front bottom or the rear bottom is welded on a barrel section, because the size of the manhole is usually much smaller than the diameter of the thin-wall revolving body structure, a tightening device cannot pass through the manhole in an assembled state, and therefore the workers are generally required to bring parts of the tightening device into the thin-wall revolving body structure from the manhole for assembly, and the assembled tightening device is used for tightening the front bottom or the rear bottom. After the front bottom or the rear bottom is welded, the stretching device is disassembled and transported out, the whole machining process is complicated, time and labor are wasted, and the machining efficiency is low. Therefore, how to solve the problem that the tightening device of the large-sized thin-walled revolving body structure in the prior art is inconvenient for entering and exiting the inside of the large-sized thin-walled revolving body structure from a manhole is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a thin-wall revolving body tightening device which can simply and conveniently support a thin-wall revolving body and can be conveniently taken out after the revolving body is welded.
In order to solve the above problems, the present invention provides a thin-wall revolving body tightening device, comprising: the center frame is provided with a first linear driving device extending along the axial direction of the center frame; a plurality of tightening mechanisms which are distributed along the circumferential direction of the center frame and each of which comprises a brace rod, a connecting rod and a correcting block, the first section of the stay bar can be extended and contracted relative to the second section of the stay bar, the first section of the stay bar is hinged with the center frame, one end of the connecting rod is hinged with the movable part of the first linear driving device, the other end of the connecting rod is hinged with the first section of the support rod, so that the first linear driving device drives the stay bar to rotate around the hinge point of the stay bar and the center frame through the connecting rod, the correcting block is arranged at one end, far away from the center frame, of the second section of the supporting rod and comprises two arc-shaped blocks used for abutting against the inner wall of the revolving body, the two arc-shaped blocks are respectively arranged on two sides of the supporting rod and hinged with the supporting rod, and the tightening mechanism further comprises a driving structure used for driving the arc-shaped blocks to rotate.
Preferably, prop tight mechanism and still include second linear drive device and sliding support, second linear drive device one end with the centre frame is articulated, the other end with sliding support is articulated, be equipped with the confession on the vaulting pole first section the gliding slide rail of sliding support, sliding support set up in slidable in the slide rail.
Preferably, the second linear driving device is an air cylinder or an electric cylinder.
Preferably, the number of the driving mechanisms is the same as that of the arc-shaped blocks, the driving mechanisms correspond to the arc-shaped blocks one by one, each driving mechanism is an air cylinder or an electric cylinder, each arc-shaped block is provided with a sliding groove, one end of each driving mechanism is hinged to the second section of the supporting rod, the other end of each driving mechanism is slidably mounted in the corresponding sliding groove of the arc-shaped block through a pin shaft, and the driving mechanism further comprises a limiting structure for limiting the opening position of the arc-shaped block.
Preferably, the lateral wall of vaulting pole is equipped with and is used for holding actuating mechanism with the holding tank of arc piece, actuating mechanism with the pin joint of vaulting pole is located in the holding tank, so that when the arc piece folds, actuating mechanism and corresponding the arc piece can get into the holding tank.
Preferably, the first section of the brace rod is in sliding fit with the second section of the brace rod, a third linear driving device is arranged on the first section of the brace rod, and the third linear driving device is in transmission connection with the second section of the brace rod to drive the second section of the brace rod to move relative to the first section of the brace rod.
Preferably, the third linear driving device is an air cylinder or an electric cylinder.
Preferably, the linear driving device further comprises a guide rail arranged on the center frame and extending along the axial direction of the center frame and a sliding block in sliding fit with the guide rail, and the movable part of the first linear driving device is connected with the sliding block.
Preferably, the first linear driving device comprises a spiral elevator and a motor in transmission connection with the spiral elevator, a casing of the spiral elevator is connected with the center frame, and a push rod of the spiral elevator forms a movable part of the first linear driving device.
Preferably, the first linear driving device is an air cylinder, a cylinder body of the air cylinder is connected with the center frame, and a piston rod of the air cylinder forms a movable part of the first linear driving device; or the first linear driving device is a push rod motor, a shell of the push rod motor is connected with the center frame, and a push rod of the push rod motor forms a movable part of the first linear driving device.
In the technical scheme provided by the invention, the thin-wall revolving body tightening device comprises: centre frame and tightening mechanism. The center frame is provided with a first linear driving device extending along the axial direction of the center frame. The quantity of the tightening mechanisms is multiple, and the tightening mechanisms are distributed along the circumferential direction of the center frame. Each tightening mechanism comprises a support rod, a connecting rod and a correcting block. The first section of the support rod can stretch out and draw back relative to the second section of the support rod, the first section of the support rod is hinged with the center frame, one end of the connecting rod is hinged with the movable part of the first linear driving device, and the other end of the connecting rod is hinged with the first section of the support rod, so that the first linear driving device drives the support rod to rotate around a hinged point of the support rod and the center frame through the connecting rod. The correcting block is arranged at one end, far away from the center frame, of the second section of the support rod and comprises two arc-shaped blocks used for abutting against the inner wall of the revolving body. The two arc blocks are respectively arranged on two sides of the support rod and are hinged with the support rod, and the tightening mechanism further comprises a driving mechanism for driving the arc blocks to rotate.
When the thin-wall revolving body tightening device is used for supporting the rear bottom of the revolving body, the first linear driving device is controlled to drive the connecting rod to drive the support rod to rotate to the vertical state, so that the radial size of the thin-wall revolving body tightening device is reduced, and the thin-wall revolving body tightening device can enter the rear bottom from a manhole. After the inner part of the rear bottom is entered, the first linear driving device is controlled to drive the connecting rod to drive the stay bar to rotate to a horizontal state, then the corresponding arc blocks are controlled to be unfolded through the driving mechanism, and finally the stay bar is controlled to extend to enable all the arc blocks to be propped against the inner wall of the rear bottom, so that the inner wall of the rear bottom is tightly propped from the inner part. After the machining is finished, the stay bar is shortened, then the driving mechanism drives the arc-shaped block to retract, finally the first linear driving device drives the connecting rod to drive the stay bar to rotate in a vertical state, and then the thin-wall revolving body supporting device is taken out from a manhole on the rear bottom.
So set up, the manhole at the bottom of thin wall solid of revolution props tight device can pass in and out the back end with the folding state, can expand again after entering into the back end inside in order to prop tight back end inner wall, and whole process need not to prop tight device with the thin wall solid of revolution and dismantle and assemble, gets to put and prop tightly and loosen all convenient and fast, can save process time effectively, improves machining efficiency.
In addition, the thin-wall revolving body tightening device in the embodiment of the invention also has the following advantages:
1. the thin-wall revolving body tightening device has the advantages that the diameter of the enveloping excircle of the tightening device after complete contraction is smaller than the diameter of the manhole on the revolving body, the diameter of the enveloping excircle of the tightening device after complete expansion is the same as the inner diameter of the revolving body, and the tightening device has a larger folding-unfolding ratio, so that the problem that the diameters of the revolving bodies needing to be tightened are large due to small hole diameters of through holes for the tightening device to enter and exit, such as a front bottom and a rear bottom, of the revolving body during the machining of an oil storage tank can be effectively solved. It should be noted that the thin-walled revolving body in the present invention is not limited to the tightening of the rear bottom, but can also be used for the tightening of the front bottom and the barrel section, and the tightening of any large-sized thin-walled revolving body.
2. When the thin-wall revolving body tightening device is used for tightening, the stay bar is firstly rotated to the horizontal direction, and then the stay bar is extended to enable the arc-shaped blocks on the stay bar to tightly abut against the inner wall of the revolving body, namely the stay bar tightly abuts against the inner wall of the revolving body along the radial direction of the revolving body, so that the inner wall of the revolving body cannot be scratched in tightening and loosening processes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art fuel storage tank;
FIG. 2 is a schematic structural diagram of a thin-walled revolving body tightening device according to an embodiment of the present invention;
FIG. 3 is a schematic view of the internal structure of the thin-walled revolving body tightening device according to the embodiment of the present invention;
FIG. 4 is a schematic structural view of a tightening mechanism according to an embodiment of the present invention;
FIG. 5 is a schematic view of the tightening mechanism of FIG. 4 at another angle;
fig. 6 is a partially enlarged view of fig. 5.
In fig. 1-6:
1. a front bottom; 2. a barrel section; 3. a rear bottom; 4. a center frame; 5. a stay bar; 6. a connecting rod; 7. an arc-shaped block; 8. a drive mechanism; 9. a second linear drive; 10. a sliding support; 11. a chute; 12. a screw elevator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the invention recited in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 2-6, the embodiment of the present invention provides a thin-wall revolving body tightening device, which includes a center frame 4 and a tightening mechanism. Wherein, the center frame 4 is provided with a first linear driving device extending along the axial direction of the center frame 4, as shown in fig. 3, when the center frame 4 is placed according to the posture shown in fig. 3, the axial direction of the center frame 4 is the vertical direction in the figure. The bottom of the center frame 4 may be fixed to a table or a turntable by bolts or the like. Referring to fig. 2, the number of the tightening mechanisms is plural, and the plural tightening mechanisms are distributed along the circumferential direction of the center frame 4. Alternatively, the number of the tightening mechanisms is 12, and the 12 tightening mechanisms are evenly distributed along the circumferential direction of the center frame 4. Each tightening mechanism comprises a support rod 5, a connecting rod 6 and a correcting block. The stay bar 5, the connecting rod 6 and the shape correcting block are the same in number and are in one-to-one correspondence. The first section of the strut 5 is telescopic relative to the second section of the strut 5 to enable the strut 5 to be lengthened or shortened. Referring to fig. 3, a first section of the stay 5 is hinged to the steady rest 4. One end of the connecting rod 6 is hinged with the first section of the support rod 5, and the other end of the connecting rod 6 is hinged with a movable part of the first linear driving device, so that the first linear driving device can drive the support rod 5 to rotate around a hinged point of the support rod 5 and the center frame 4 through the connecting rod 6 during telescopic operation. Alternatively, a joint seat is provided on the drive part of the first linear drive, to which joint seat the individual connecting rods 6 are connected. Referring to fig. 4, the shape correction block is arranged at one end of the second section of the stay bar 5 far away from the center frame 4, and the shape correction block comprises two arc blocks 7 for abutting against the inner wall of the revolving body. Preferably, the outer contour diameter of the arc blocks 7 is the same as the inner diameter of the revolving body to be braced, and the length of the arc blocks 7 can satisfy the requirement that a closed circular ring can be formed when all the arc blocks 7 are unfolded, so that the revolving body can be braced better. The tightening mechanism further comprises a driving mechanism 8 used for driving the arc-shaped block 7 to rotate, when the revolving body needs to be tightened, the driving mechanism 8 drives the arc-shaped block 7 to be opened, the outline of the arc-shaped block 7 can be abutted to the inner wall of the revolving body, and after the processing is finished, when the thin-wall revolving body tightening device needs to be folded, the driving mechanism 8 drives the arc-shaped block 7 to rotate inwards and be folded, so that the arc-shaped blocks 7 of the support rods 5 on the two adjacent support rods 5 in the folding process are prevented from interfering with each other.
When the thin-wall revolving body tightening device is used for supporting the rear bottom 3 of the revolving body, the first linear driving device is controlled to drive the connecting rod 6 to drive the stay bar 5 to rotate to the vertical state, so that the radial size of the thin-wall revolving body tightening device is reduced, and the thin-wall revolving body tightening device can enter the rear bottom 3 from a manhole. After entering into back end 3 inside, drive connecting rod 6 drive vaulting pole 5 through controlling first linear drive device earlier and rotate to the horizontality, then control corresponding arc 7 through actuating mechanism 8 and expand, thereby control vaulting pole 5 extension at last makes each arc 7 support on the inner wall of back end 3 from inside the inner wall of stretching back end 3. After the processing is finished, the stay bar 5 is shortened, then the driving mechanism 8 drives the arc-shaped block 7 to retract, finally the first linear driving device drives the connecting rod 6 to drive the stay bar 5 to rotate in a vertical state, and then the thin-wall revolving body tightening device is withdrawn from a manhole on the rear bottom 3.
So set up, the thin wall solid of revolution props tight device can be with the folding state business turn over manhole at the back end 3, can expand again after entering into 3 inside back ends in order to prop 3 inner walls at the back end tightly, and whole process need not to prop tight device with the thin wall solid of revolution and dismantle and assemble, gets to put and prop tightly and loosen all convenient and fast, can save process time effectively, improves machining efficiency.
In addition, the thin-wall revolving body tightening device in the embodiment of the invention also has the following advantages:
1. the thin-wall revolving body tightening device has the advantages that the diameter of the enveloping excircle of the tightening device after complete contraction is smaller than the diameter of the manhole on the revolving body, the diameter of the enveloping excircle of the tightening device after complete expansion is the same as the inner diameter of the revolving body, and the tightening device has a larger folding-unfolding ratio, so that the problem that the diameters of the revolving bodies needing to be tightened are large due to the small diameters of through holes for the tightening device to enter and exit, such as the front bottom 1 and the rear bottom 3, of the revolving body during the machining of the oil storage tank can be effectively solved. It should be noted that the thin-walled revolving body in the present invention is not limited to the tightening of the rear bottom 3, but may be used for tightening the front bottom 1 and the barrel section 2, and for tightening any large-sized thin-walled revolving body.
2. When the thin-wall revolving body tightening device is used for tightening, firstly, the stay bar 5 is rotated to the horizontal direction, and then the stay bar 5 is extended to enable the arc-shaped blocks 7 on the stay bar 5 to tightly abut against the inner wall of the revolving body, namely, the stay bar 5 tightly abuts against the inner wall of the revolving body along the radial direction of the revolving body, and the inner wall of the revolving body cannot be scratched in the tightening and loosening processes.
Because the cylinder section 2 and the cylinder section 2 of the revolving body, the cylinder section 2 and the rear bottom 3 and the like are welded in a friction stir welding mode, a welding stirring head can generate larger pressure on the rear bottom 3 in the welding process, and in order to enable the thin-wall revolving body tightening device to provide larger and more stable supporting force, in some embodiments, the tightening mechanism further comprises a second linear driving device 9 and a sliding support 10. One end of the second linear driving device 9 is hinged with the center frame 4, the other end of the second linear driving device is hinged with the sliding support 10, a sliding rail for the sliding support 10 to slide is arranged on the first section of the support rod 5, and the sliding support 10 is slidably arranged in the sliding rail. Alternatively, the second linear drive 9 may be a pneumatic cylinder or an electric cylinder. When the stay bar 5 rotates, the second linear driving device 9 is in a free state to extend or shorten along with the rotation of the stay bar 5, when the stay bar 5 rotates to a horizontal state, the second linear driving device 9 is locked, the second linear driving device 9 can provide supporting force for the stay bar 5, and bear the pressure brought by a welding stirring head together with the stay bar 5, the integral rigidity of the tightening mechanism is improved, and the thin-wall revolving body tightening device can keep the stability of the structure in the welding process.
Referring to fig. 2 and 4, in some embodiments, the number of the driving mechanisms 8 is the same as the number of the arc-shaped blocks 7, and corresponds to one. The drive mechanism 8 may be a pneumatic cylinder or an electric cylinder. Each arc block 7 is provided with a sliding groove 11, one end of each driving mechanism 8 is hinged on the second section of the support rod 5, and the other end of each driving mechanism is slidably arranged in the corresponding sliding groove 11 of the arc block 7 through a pin shaft. Referring to fig. 5 and 6, the device further comprises a limiting structure for limiting the opening position of the arc block 7. The limiting structure mainly comprises a side plane A on the second section of the support rod 5 and an end plane B of the arc block 7, and when the end plane B on the arc block 7 is attached to the side plane A on the support rod 5, the arc block 7 can not further rotate, so that the limiting of the arc block is completed. The unfolding process of the arc-shaped block 7 is as follows: firstly, the driving mechanism 8 extends, the pin shaft in the sliding groove 11 slides along the sliding groove 11, the pin shaft drives the arc-shaped block 7 to swing while sliding along the sliding groove 11 until the end plane B on the arc-shaped block 7 is attached to the side plane A on the support rod 5, and the arc-shaped block 7 is completely unfolded. So set up, can convenient and fast ground drive arc piece 7 expand and fold.
Referring to fig. 5, in some embodiments, the side wall of the stay bar 5 is provided with a receiving groove for receiving the driving mechanism 8 and the arc-shaped block 7. The hinge point of the driving mechanism 8 and the support rod 5 is located in the accommodating groove, so that when the arc-shaped blocks 7 are folded, the driving mechanism 8 and the corresponding arc-shaped blocks 7 can enter the accommodating groove.
In some embodiments, the first section of strut 5 is slidably engaged with the second section of strut 5, e.g., the second section of strut 5 slidably extends into the first section of strut 5. And a third linear driving device is arranged on the first section of the support rod 5 and is in transmission connection with the second section of the support rod 5 so as to drive the second section of the support rod 5 to move relative to the first section of the support rod 5. Optionally, the third linear drive is a pneumatic cylinder or an electric cylinder. Taking the cylinder as an example, the cylinder body of the cylinder is connected with the first section of the support rod 5, the piston rod of the cylinder is connected with the second section of the support rod 5, and the cylinder drives the second section of the support rod 5 to move along the first section of the support rod 5 when expanding and contracting.
In some embodiments, the first linear drive comprises a screw lift 12 and a motor drivingly connected to the screw lift 12. The housing of the screw elevator 12 is connected to the centre frame 4, and the push rods of the screw elevator 12 form the moving parts of the first linear drive, i.e. all the connecting rods 6 are hinged to the push rods of the screw elevator 12 by means of hinge mounts. Of course, the first linear driving device is not limited to the above-described structure, and for example, the first linear driving device may be an air cylinder. The cylinder body of the cylinder is connected with the centre frame 4, and the piston rod of the cylinder forms the movable part of the first linear driving device. Alternatively, the first linear driving device may be a push rod motor. The shell of the push rod motor is connected with the center frame 4, and the push rod of the push rod motor forms a movable part of the first linear driving device.
In some embodiments, the thin-walled revolving body tightening device further comprises a guide rail arranged on the center frame 4 and extending along the axial direction of the center frame 4, and a slide block in sliding fit with the guide rail. The movable part of the first linear driving device is connected with the sliding block. Referring to fig. 3, in the welding process, the force generated by the welding stirring head is transmitted to the center frame 4 along the support rod 5, the connecting rod 6 and the first linear driving device in sequence, the force easily damages the first linear driving device when passing through the first linear driving device, so that the service life of the first linear driving device is affected, and through the arrangement of the guide rail and the slide block, the force transmitted by the connecting rod 6 passes through the movable part of the first linear driving device, then acts on the guide rail through the slide block, and then acts on the center frame 4 through the guide rail. Alternatively, the first linear drive may be connected to the slide by a connection, such as a connecting plate or a connecting rod. Alternatively, the number of the guide rails is plural, and the plural guide rails are uniformly distributed along the circumferential direction of the center frame 4.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A thin-wall revolving body tightening device is characterized by comprising:
the center frame (4) is provided with a first linear driving device extending along the axial direction of the center frame;
the number of the tightening mechanisms is multiple, the tightening mechanisms are distributed along the circumferential direction of the center frame (4), each tightening mechanism comprises a stay bar (5), a connecting rod (6) and a correction block, a first section of each stay bar (5) can stretch relative to a second section of each stay bar (5), the first section of each stay bar (5) is hinged with the center frame (4), one end of each connecting rod (6) is hinged with a movable part of the first linear driving device, the other end of each connecting rod is hinged with the first section of each stay bar (5), so that the first linear driving device drives the stay bars (5) to rotate around hinged joints of the stay bars (5) and the center frame (4) through the connecting rods (6), the correction block is arranged at one end, far away from the center frame (4), of the second section of each stay bar (5), and comprises two arc-shaped blocks (7) which are used for abutting against the inner wall of the revolving body, two arc pieces (7) set up respectively in the both sides of vaulting pole (5) and all with vaulting pole (5) are articulated, prop tight mechanism still including being used for the drive arc piece (7) pivoted actuating mechanism (8), wherein, actuating mechanism's (8) quantity with the same and the one-to-one of quantity of arc piece (7), actuating mechanism (8) are cylinder or electric jar, each all be equipped with spout (11) on arc piece (7), each actuating mechanism (8) homogeneous end hinge in on vaulting pole (5) second section, the other end through round pin axle slidable install in corresponding arc piece (7) in spout (11), still including be used for right the spacing limit structure in the position that opens of arc piece (7).
2. The thin-wall revolving body tightening device according to claim 1, characterized in that the tightening mechanism further comprises a second linear driving device (9) and a sliding support (10), one end of the second linear driving device (9) is hinged to the center frame (4), the other end of the second linear driving device is hinged to the sliding support (10), a first section of the stay bar (5) is provided with a sliding rail for the sliding support (10) to slide, and the sliding support (10) is slidably disposed in the sliding rail.
3. The thin-walled revolving body tightening device according to claim 2, characterized in that the second linear driving device (9) is a cylinder or an electric cylinder.
4. The thin-wall revolving body tightening device according to claim 1, characterized in that the side wall of the stay bar (5) is provided with a receiving groove for receiving the driving mechanism (8) and the arc-shaped block (7), and the hinge point of the driving mechanism (8) and the stay bar (5) is located in the receiving groove, so that the driving mechanism (8) and the corresponding arc-shaped block (7) can enter the receiving groove when the arc-shaped block (7) is folded.
5. The thin-wall revolving body tightening device according to claim 1, characterized in that the first section of the brace rod (5) is in sliding fit with the second section of the brace rod (5), and a third linear driving device is arranged on the first section of the brace rod (5) and is in transmission connection with the second section of the brace rod (5) to drive the second section of the brace rod (5) to displace relative to the first section of the brace rod (5).
6. The thin-walled body of revolution tightening device according to claim 5, characterized in that said third linear drive means is a cylinder or an electric cylinder.
7. The thin-wall revolving body tightening device according to claim 1, further comprising a guide rail disposed on the center frame (4) and extending in the axial direction of the center frame (4), and a slider slidably engaged with the guide rail, wherein the movable member of the first linear driving device is connected to the slider.
8. The thin-wall revolving body tightening device according to claim 1, characterized in that the first linear driving device comprises a spiral elevator (12) and a motor in transmission connection with the spiral elevator (12), the casing of the spiral elevator (12) is connected with the center frame (4), and the push rod of the spiral elevator (12) constitutes the movable part of the first linear driving device.
9. The thin-wall revolving body tightening device according to claim 1, characterized in that the first linear driving device is a cylinder, the cylinder body of which is connected to the center frame (4), and the piston rod of which constitutes the movable part of the first linear driving device; or the first linear driving device is a push rod motor, a shell of the push rod motor is connected with the center frame (4), and a push rod of the push rod motor forms a movable part of the first linear driving device.
CN202010751672.1A 2020-07-30 2020-07-30 Thin-wall revolving body tightening device Active CN111922506B (en)

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