Truss temporary fixing device and steel structure space pipe truss construction method

Abstract

The application relates to a truss temporary fixing device and a steel structure space pipe truss construction method, and relates to the technical field of steel structure construction. In order to solve the problem that the installation process of an I-shaped steel support is complicated, the application comprises a base, a support assembly, a fastening assembly, an extension pipe and a positioning assembly, a plurality of universal wheels for driving the base to move are installed under the base; the support assembly comprises a hydraulic cylinder arranged on the side wall of the base, and the extension end of the hydraulic cylinder faces the ground; the fastening assembly is arranged on the base and is used for fixing the base and a stand column; the extension pipe is slidably arranged on the base, and the end of the extension pipe away from the base is used for supporting an upper chord; and the positioning assembly is arranged on the base and is used for positioning the truss. The application has the effects of improving the convenience of installation of the truss fixing device and improving the construction efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of steel structure construction, in particular to a truss temporary fixing device and a steel structure space pipe truss construction method. BACKGROUND

[0002] With the vigorous development of the urbanization process in China, the development speed of the building industry in China is also continuously accelerating, and large-span steel structures are widely used in various sports venues, theaters, airports and other public buildings. Among them, building enterprises have also begun to use various advanced technologies in large-span space steel structure engineering. The use of advanced technology can greatly improve construction efficiency, which has a great promoting effect on the subsequent development of the building industry.

[0003] However, at the present stage, due to the relatively complex construction site environment of large-span space steel structure engineering, and the various forms of large-span space steel structures, some construction problems are inevitable in the actual construction process. In the construction process of the large-span steel structure space pipe truss, since the truss is a reverse triangular structure, only the lower chord member of the truss is fixed on the column support, the structural stability is poor, and temporary support needs to be provided for the truss. The current temporary support method is to set an I-beam on both sides of the support to support the two upper chord members of the reverse triangular truss. Before the I-beam is used as a support frame, the I-beam needs to be cut to the appropriate length, then hoisted to the designated area, fixed and supported on the truss. When the construction is completed, the I-beam also needs to be removed. Although the I-beam is used for support, the I-beam cannot be reused due to the length, and the I-beam needs to be processed and welded for reinforcement during the construction process, so the installation process is complicated. SUMMARY

[0004] In order to improve the convenience of the truss fixing device and improve the construction efficiency, the application provides a truss temporary fixing device and a steel structure space pipe truss construction method.

[0005] In the first aspect, the application provides a truss temporary fixing device, which adopts the following technical scheme:

[0006] A truss temporary fixing device comprises

[0007] A base is provided with a plurality of universal wheels for driving the base to move;

[0008] A support assembly comprises a hydraulic cylinder arranged on the side wall of the base, and the telescopic end of the hydraulic cylinder faces the ground;

[0009] A fastening assembly is arranged on the base, and the fastening assembly is used to fix the base to the column;

[0010] A telescopic pipe is slidingly arranged on the base, and one end of the telescopic pipe away from the base is used for supporting the upper chord;

[0011] A positioning assembly is arranged on the base for positioning the truss,

[0012] By adopting the above technical scheme, the universal wheel is arranged to facilitate the movement of the temporary fixing device, thereby reducing the time consumed for hoisting the fixing device by using other equipment, and the positioning assembly can position the truss during hoisting, so that the truss installation is more accurate. The extension of the telescopic end of the hydraulic cylinder supports the base, the fastening assembly fixes the stand and the base, reduces the deviation of the base during the supporting installation process, the telescopic pipe can be telescoped in the vertical direction, thereby facilitating the support of the truss of different heights, and the telescopic pipe can move laterally on the base, thereby facilitating the support of the telescopic pipe to the truss of different widths, and enhancing the applicability of the device. The temporary fixing device is easy to operate during installation and disassembly, and does not require other mechanical equipment to assist the supporting device, thereby being more convenient to use.

[0013] As a preferred, a through hole for accommodating the stand is arranged on the base, the fastening assembly comprises a threaded rod threadedly connected with the through hole, one end of the threaded rod penetrates the side wall of the through hole and is connected with an abutting plate, and the other end of the threaded rod penetrates the side wall of the base and is threadedly connected with a locking nut.

[0014] By adopting the above technical scheme, the threaded rod is screwed to move the abutting plate in the direction close to and away from the stand, thereby facilitating the abutting plate to fix the base and the stand.

[0015] As a preferred, one end of the telescopic pipe away from the base is connected with an inclined sliding plate, the sliding plate gradually approaches the stand along the vertical direction, and the end of the sliding plate close to the stand is provided with an arc segment.

[0016] By adopting the above technical scheme, when the upper chord slides downward on the sliding plate, the telescopic pipe is pushed to move laterally, thereby adjusting the distance between the two telescopic pipes, and the arc segment of the sliding plate is used for supporting the upper chord, and the inclined sliding plate can drive the telescopic pipe to move laterally when subjected to the vertical downward pressure.

[0017] As a preferred, a dovetail groove is arranged on the base, a dovetail block is slidingly arranged in the dovetail groove, and the dovetail block is fixedly connected with one end of the telescopic pipe away from the sliding plate.

[0018] By adopting the above technical scheme, the arrangement of the dovetail block and the dovetail groove enables the telescopic pipe to move laterally, while providing limiting action on both sides of the telescopic pipe, thereby reducing the tilting of the telescopic pipe.

[0019] The spring is fixedly connected to the side wall of the dovetail groove.

[0020] By adopting the above technical scheme, when the telescopic pipe moves in the direction of the spring, the spring generates resistance to the limiting block, so as to reduce the moving speed of the limiting block, and further slow down the lowering speed of the truss on the slide plate, thereby reducing the impact force when the truss falls into the arc segment.

[0021] Preferably, the positioning assembly comprises a hollow support rod detachably connected to the base, a telescopic rod is slidably arranged in the support rod, a telescopic spring is connected between one end of the telescopic rod and the inner bottom wall of the support rod, and a clamping ring for clamping the lower chord is detachably connected to the other end of the telescopic rod.

[0022] By adopting the above technical scheme, when the truss is lowered during hoisting, the lower chord of the truss is first placed into the clamping ring, and then the truss is only lowered vertically. The truss exerts pressure on the telescopic rod, so that the telescopic rod moves downward in the support rod, and the telescopic spring is compressed. The telescopic spring generates a reverse force on the truss to slow down the lowering speed of the truss.

[0023] Preferably, the telescopic pipe comprises a first telescopic pipe, a second telescopic pipe, a third telescopic pipe and a fourth telescopic pipe. The second telescopic pipe is slidably arranged in the first telescopic pipe. The third telescopic pipe is slidably arranged in the second telescopic pipe. The fourth telescopic pipe is slidably arranged in the third telescopic pipe. A driving assembly is arranged in the first telescopic pipe, and the driving assembly is used to simultaneously drive the second telescopic pipe, the third telescopic pipe and the fourth telescopic pipe to move vertically.

[0024] By adopting the above technical scheme, the second telescopic pipe is slidably arranged in the first telescopic pipe, the third telescopic pipe is slidably arranged in the second telescopic pipe, and the fourth telescopic pipe is slidably arranged in the third telescopic pipe. The telescopic function of the telescopic pipe enables the telescopic pipe to support trusses of different heights. The driving assembly can drive the second telescopic pipe, the third telescopic pipe and the fourth telescopic pipe to telescope.

[0025] Preferably, a first gear is fixedly connected to the inner wall of the first telescopic pipe. A third gear opposite to the first gear is fixedly connected to the outer wall of the third telescopic pipe. First perforations are formed in the two opposite side walls of the second telescopic pipe. A first gear wheel meshing with the first gear and the third gear is rotatably connected in the first perforation.

[0026] A second gear is fixedly connected to the inner wall of the second telescopic pipe. A fourth gear opposite to the second gear is fixedly connected to the outer wall of the fourth telescopic pipe. Second perforations are formed in the two opposite side walls of the third telescopic pipe. A second gear wheel meshing with the second gear and the fourth gear is rotatably connected in the second perforation.

[0027] The driving assembly is used for driving the second telescopic pipe to ascend or descend.

[0028] By adopting the technical scheme, when the driving assembly drives the second telescopic pipe to ascend, the first gear rotates and moves vertically on the first rack, and the third rack moves vertically when the first gear rotates, thereby driving the third telescopic pipe to ascend, and the second gear rotates when the third telescopic pipe ascends, thereby driving the fourth rack to ascend, so that the fourth telescopic pipe moves upward. Thus, the telescopic pipe is elongated, and when the driving assembly drives the second telescopic pipe to descend, the fourth telescopic pipe, the third telescopic pipe and the second telescopic pipe are all retracted into the first telescopic pipe, thereby realizing the shortening function of the telescopic pipe.

[0029] Preferably, the driving assembly comprises a threaded screw rod threadedly connected with the second telescopic pipe, and a driving source is arranged on the inner bottom wall of the first telescopic pipe to drive the threaded screw rod to rotate.

[0030] By adopting the technical scheme, the driving source drives the threaded screw rod to rotate, and the second telescopic pipe is not prone to rotating under the limiting action of the first telescopic pipe, so that the second telescopic pipe moves upward or downward on the threaded screw rod.

[0031] In a second aspect, the application provides a steel structure space pipe truss construction method, comprising the following steps:

[0032] S1. Truss ground assembly: setting up a temporary support on the ground, assembling the top chord and the bottom chord into an integral truss on the temporary support;

[0033] S2. Temporary support device fixing: moving the temporary support device to the column and fixing the temporary support device with the column;

[0034] S3. Hoisting the truss: hoisting the assembled truss into the clasp ring by a crane, and gradually lowering the truss until the bottom chord is fixed on the support of the column;

[0035] S4. Temporary support device dismounting.

[0036] In summary, the application has at least one of the following beneficial technical effects:

[0037] 1. The telescopic end of the hydraulic cylinder supports the base, and the fastening assembly fixes the column and the base, thereby reducing the deviation of the base in the supporting installation process. The telescopic pipe can be telescoped in the vertical direction, thereby facilitating the support of trusses of different heights. The telescopic pipe can move laterally on the base, thereby facilitating the support of trusses of different widths, and enhancing the applicability of the device. The temporary fixing device is easy to operate in the installation and dismounting process, and no other mechanical equipment is needed to assist the support device, thereby making the device more convenient to use.

[0038] 2. When the telescopic tube moves in the direction of the spring, the spring generates resistance to the limiting block, so as to reduce the moving speed of the limiting block, and further slow down the speed of the truss on the slide plate, thereby reducing the impact force when the truss falls into the arc segment. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0040] Figure 2 is a schematic diagram of the structure of the fastening assembly of the embodiment of the present application;

[0041] Figure 3 is a schematic diagram of the cross section of the telescopic tube of the embodiment of the present application;

[0042] Figure 4 is a schematic diagram of the cross section of the base of the embodiment of the present application;

[0043] Figure 5 is an exploded schematic diagram of the positioning assembly of the embodiment of the present application.

[0044] BRIEF DESCRIPTION OF DRAWINGS 1. base; 11. through hole; 12. dovetail groove; 13. dovetail block; 14. spring; 2. universal wheel; 3. support assembly; 31. fixed seat; 32. hydraulic cylinder; 33. pressing plate; 4. fastening assembly; 41. threaded rod; 42. abutting plate; 43. locking nut; 5. telescopic tube; 51. first telescopic tube; 511. first rack; 52. second telescopic tube; 521. first gear; 522. second rack; 53. third telescopic tube; 531. second gear; 532. third rack; 54. fourth telescopic tube; 541. fourth rack; 55. abutting edge; 56. driving assembly; 561. driving source; 562. threaded screw; 563. moving rod; 564. fixed block; 6. slide plate; 7. positioning assembly; 71. support rod; 72. telescopic rod; 73. telescopic spring; 74. clasp; 8. truss; 81. upper chord; 82. lower chord. DETAILED DESCRIPTION

[0045] The following will be described in detail in combination with the accompanying drawings Figures 1-5 The present application will be further described in detail.

[0046] The embodiment of the present application discloses a truss temporary fixing device. Referring to Figure 1, including a cuboid base 1, a plurality of universal wheels 2 are arranged on the bottom surface of the base 1 to facilitate the movement of the base 1, the universal wheels 2 are four and are correspondingly arranged at the four corners close to the base 1. A support assembly 3 is arranged on the base 1, the support assembly 3 includes a fixed seat 31 arranged on the opposite two side walls of the base 1, and the fixed seat 31 is fixedly connected with a hydraulic cylinder 32 on the side facing the ground, and the telescopic end of the hydraulic cylinder 32 is vertically connected with a pressing plate 33.

[0047] When the base 1 moves to the designated location, the telescopic end of the hydraulic cylinder 32 is elongated towards the ground, so that the pressing plate 33 abuts against the ground to provide support force for the base 1. When the telescopic end of the hydraulic cylinder 32 is elongated, the base 1 will move upwards, until the universal wheels 2 are separated from the ground, or the pressing plate 33 and the universal wheels 2 simultaneously provide support force for the base 1, which reduces the possibility of damage to the universal wheels 2 caused by excessive pressure on the base 1, and the pressing plate 33 can increase the contact area between the telescopic end of the hydraulic cylinder 32 and the ground, thereby dispersing the concentrated stress of the telescopic end of the hydraulic cylinder 32 and reducing the damage to the concrete ground caused by the concentrated stress.

[0048] Referring to Figure 1 and Figure 2 , a through hole 11 with a square cross section is formed in the base 1, so that the cross section of the base 1 is concave, and a fastening assembly 4 is arranged on the opposite two side walls of the through hole 11, the fastening assembly 4 includes a threaded rod 41 and a circular pie-shaped abutting plate 42, a threaded hole is formed in the opposite two side walls of the through hole 11, the threaded rod 41 is threadedly connected in the threaded hole, one end of the threaded rod 41 is fixedly connected with the center of the abutting plate 42 through the side wall of the through hole 11, and the other end of the threaded rod 41 is threadedly connected with a locking nut 43 through the side wall of the base 1.

[0049] The base 1 is moved so that the column is located in the through hole 11, the threaded rods 41 at both ends are screwed to make the abutting plate 42 close to the side wall of the column until the abutting plate 42 abuts against the column, and the locking nut 43 is screwed to make the locking nut 43 abut against the side wall of the base 1, so as to fasten the base 1 and the column, increase the stability of the base 1, and prevent the base 1 from slipping, and the abutting plate 42 makes the distance between the column and the two opposite side walls of the through hole 11 consistent or close, which can also play a positioning role in the installation of the subsequent column and truss 8.

[0050] Referring to Figure 1 and Figure 3The base 1 is provided with two telescopic pipes 5 arranged on both sides of the through hole 11, the telescopic pipe 5 comprises a first telescopic pipe 51, a second telescopic pipe 52, a third telescopic pipe 53 and a fourth telescopic pipe 54, the first telescopic pipe 51, the second telescopic pipe 52, the third telescopic pipe 53 and the fourth telescopic pipe 54 are square tubes and hollow inside, the first telescopic pipe 51 and the fourth telescopic pipe 54 are provided with openings at one end, and the second telescopic pipe 52 and the third telescopic pipe 53 are provided with through holes at both ends. The inner side walls of the first telescopic pipe 51, the second telescopic pipe 52, the third telescopic pipe 53 and the fourth telescopic pipe 54 are fixedly connected with two parallel abutting edges 55, the abutting edges 55 are arranged along the length direction of the telescopic pipe 5, the second telescopic pipe 52 is slidingly arranged between the two abutting edges 55 on the first telescopic pipe 51, the third telescopic pipe 53 is slidingly arranged between the two abutting edges 55 on the second telescopic pipe 52, and the fourth telescopic pipe 54 is slidingly arranged between the two abutting edges 55 on the third telescopic pipe 53.

[0051] Referring to Figure 3 The inner wall of the first telescopic pipe 51 is fixedly connected with a first rack 511, the outer wall of the third telescopic pipe 53 is fixedly connected with a third rack 532 opposite to the first rack 511, the first rack 511 and the third rack 532 are arranged along the length direction of the first telescopic pipe 51 and the third telescopic pipe 53 respectively, the two opposite side walls of the second telescopic pipe 52 are provided with first through holes arranged along the length direction of the second telescopic pipe 52, and the first through holes are rotationally connected with a first gear 521, and the two ends of the first gear 521 are engaged with the first rack 511 and the third rack 532 respectively.

[0052] The inner wall of the second telescopic pipe 52 is fixedly connected with a second rack 522, the outer wall of the fourth telescopic pipe 54 is fixedly connected with a fourth rack 541 arranged opposite to the second rack 522, the second rack 522 and the fourth rack 541 are arranged along the length direction of the second telescopic pipe 52 and the fourth telescopic pipe 54 respectively, the two opposite side walls of the third telescopic pipe 53 are provided with second through holes arranged along the length direction of the third telescopic pipe 53, and the second through holes are rotationally connected with a second gear 531, and the two ends of the second gear 531 are engaged with the second rack 522 and the fourth rack 541 respectively.

[0053] Referring to Figure 3The inner bottom wall of the first telescopic pipe 51 is provided with a driving assembly 56 for driving the second telescopic pipe 52, the third telescopic pipe 53 and the fourth telescopic pipe 54 to ascend and descend. The driving assembly 56 comprises a driving source 561 fixedly connected to the inner bottom wall of the first telescopic pipe 51. The driving source 561 is a servo motor. The output end of the driving source 561 is fixedly connected with a threaded screw rod 562.

[0054] When the driving source 561 is started, the threaded screw rod 562 is driven to rotate. The second telescopic pipe 52 is not easy to rotate under the limiting action of the first limiting position, so that the threaded screw rod 562 drives the fixed block 564 and the second telescopic pipe 52 to move upwards. When the second telescopic pipe 52 moves upwards, the first gear 521 rotates and moves vertically on the first rack 511. At the same time, the first gear 521 drives the third rack 532 to move vertically when it rotates, thereby driving the third telescopic pipe 53 to move upwards. When the third telescopic pipe 53 moves upwards, the second gear 531 is driven to rotate, which in turn drives the fourth rack 541 to move upwards, so that the fourth telescopic pipe 54 moves upwards. Thus, the telescopic pipe 5 is elongated. When the driving source 561 reverses rotation, the fourth telescopic pipe 54, the third telescopic pipe 53 and the second telescopic pipe 52 are all retracted into the first telescopic pipe 51, thereby realizing the shortening function of the telescopic pipe 5.

[0055] With reference to Figure 4 Two dovetail grooves 12 are arranged on the base 1 and located on the same straight line. The dovetail grooves 12 are arranged along the length direction of the base 1. The outer bottom wall of the first telescopic pipe 51 is fixedly connected with a dovetail block 13. The dovetail block 13 is clamped in the dovetail groove 12 and can slide in the dovetail groove 12. The side wall of the dovetail groove 12 close to the hydraulic cylinder 32 is fixedly connected with a spring 14. The other end of the spring 14 is fixedly connected to the dovetail block 13.

[0056] With reference to Figure 3 The top wall of each of the two fourth telescopic pipes 54 is fixedly connected with a sliding plate 6. The sliding plate 6 comprises a straight plate arranged obliquely and a curved segment integrally formed with the end of the straight plate. The curved segment is located at the bottom end of the straight plate, and the curved segment of the sliding plate 6 is close to the vertical column.

[0057] When the truss 8 is hoisted, the two upper chords 81 on the truss 8 are respectively placed on the two straight plates in the process of lowering, and the truss 8 continues to lower, the upper chords 81 slide on the inclined surface of the straight plate, thereby exerting a horizontal thrust on the straight plate, so that the two telescopic pipes 5 move away from each other until the upper chords 81 move to the curved arc segment of the slide plate 6, at this time, the lower chords 82 of the truss 8 are located on the support of the column. When the upper chords 81 slide on the inclined surface to push the dovetail block 13 to move in the dovetail groove 12, the spring 14 is compressed, and when the spring 14 is compressed, it can exert a reverse force to reduce the sliding speed of the dovetail block 13, thereby reducing the lowering speed of the upper chords 81 on the straight plate, thereby reducing the impact force when the upper chords 81 fall into the curved arc segment. And the telescopic pipe 5 can move in the length direction of the dovetail groove 12, thereby adjusting the distance between the two telescopic pipes 5, thereby improving the applicability of the device, and the two upper chords 81 with different distances can be supported.

[0058] With reference to Figure 1 and Figure 5 The base 1 is provided with a positioning assembly 7, the positioning assembly 7 comprises a support rod 71 which is detachably connected to the base 1, the support rod 71 is hollow, and a telescopic rod 72 is arranged inside the support rod 71. The end of the support rod 71 is fixedly connected with a square fixed plate, the fixed plate is located between the two dovetail grooves 12, a plurality of bolts are arranged through the fixed plate and are threadedly connected with the base 1. The inner bottom wall of the support rod 71 close to the fixed plate is connected with a telescopic spring 73, the other end of the telescopic spring 73 is fixedly connected with the telescopic rod 72, and the end of the telescopic rod 72 away from the telescopic spring 73 is detachably connected with a U-shaped clasp 74, the clasp 74 comprises a connecting rod and a U-shaped ring, the inner wall of the connecting rod is hollow, the end of the telescopic rod 72 away from the support rod 71 is inserted into the connecting rod and is threadedly connected, and the other end of the connecting rod is fixedly connected with the U-shaped ring.

[0059] When the truss 8 is lowered, the lower chord 82 is first aligned with the clasp 74, and then the truss 8 is slowly lowered, the lower chord 82 exerts a vertical downward pressure on the telescopic rod 72, so that the telescopic spring 73 is compressed, and the telescopic rod 72 is lowered in the support rod 71. The clasp 74 plays a positioning role on the lower chord 82, reduces the deviation of the truss 8 in the process of lowering, so that the lower chord can be aligned with the column, and the positioning role is realized.

[0060] The implementation principle of the truss temporary fixing device in the embodiment of the application is that the base 1 is moved through the universal wheel 2, so that the column is located in the through hole 11, the telescopic end of the hydraulic cylinder 32 is elongated towards the ground, so that the pressing plate 33 abuts against the ground, the telescopic end of the hydraulic cylinder 32 continues to be elongated, and the base 1 is lifted upwards, so that the universal wheel 2 is separated from the ground.

[0061] Screwing the threaded rod 41 at both ends makes the abutment plate 42 close to the column side wall until the abutment plate 42 is in abutment with the column, and then screwing the locking nut 43 makes the locking nut 43 in abutment with the side wall of the base 1, thereby fastening the base 1 with the column, increasing the stability of the base 1, and making the base 1 less likely to slip.

[0062] When the driving source 561 is started, the threaded screw rod 562 is rotated, so that the second telescopic pipe 52, the third telescopic pipe 53 and the fourth telescopic pipe 54 are simultaneously moved upwards until the height of the telescopic pipe 5 exceeds the sum of the height of the column and the height of the truss 8 itself. The assembled truss 8 on the bottom surface is hoisted by using a crane, the lower chord 82 of the truss 8 is first aligned with the snap ring 74 and clamped in, and then the truss 8 is vertically lowered, and the telescopic rod 72 slides in the supporting rod 71 and moves downwards. The two upper chords 81 on the truss 8 fall on the straight plates on both sides during the lowering process, and when the truss 8 continues to be lowered, the upper chords 81 slide on the inclined surfaces of the straight plates, thereby exerting a horizontal thrust on the straight plates, so that the two telescopic pipes 5 move away from each other, until the upper chords 81 move to the curved arc segment of the sliding plate 6. If the lower chord 82 does not fall on the support of the column at this time, the driving source 561 is started to shorten the telescopic pipe 5 until the lower chord 82 is located on the support of the column. When the truss 8 is assembled, the fourth telescopic pipe 54, the third telescopic pipe 53 and the second telescopic pipe 52 are all retracted into the first telescopic pipe 51, the nuts are loosened, the abutment rod is screwed to make the abutment plate 42 disengage from the column, and the positioning assembly 7 is detached from the base 1, the telescopic end of the hydraulic cylinder is shortened, the universal wheel 2 is in abutment with the ground, and then the base 1 is transferred.

[0063] The above technical scheme can more conveniently install the temporary support device, the disassembly process is simple, and the temporary support device can be repeatedly used, thereby reducing the waste of I-shaped steel and saving project cost.

[0064] The application also discloses a steel structure space pipe truss construction method, which comprises the following steps:

[0065] S1. Truss 8 assembly: according to the ground layout control line of the axis network, a temporary support is arranged, assembly is started from one side, the lower chord and the upper chord 81 of the truss 8 are placed on the support, positioning is measured, the web bars between the chord bars are gradually assembled in place and temporarily fixed. The other side truss 8 is assembled in the same way, and finally the chord bars and the web bars of the middle part of the truss 8 are assembled, the joint interfaces of the chord bars are temporarily connected and fixed by using a plate, and subsequent disassembly is facilitated.

[0066] S2. Temporary support device fixing: the base 1 is moved so that the column is located in the through hole 11, the telescopic end of the hydraulic cylinder 32 is elongated towards the ground, the pressing plate 33 is in abutment with the ground, and the abutment plate 42 is in abutment with the column.

[0067] S3. Hoisting truss 8: using a crane to hoist the assembled truss 8 on the bottom surface, first align the lower chord 82 of the truss 8 with the clamping ring 74 and clamp it in, then vertically lower the truss 8, the telescopic rod 72 slides down in the support rod 71. Two upper chords 81 on the truss 8 fall on the straight plates on both sides during the lowering process, and when the truss 8 continues to lower, the upper chords 81 slide down on the inclined surface of the straight plate, so that the two telescopic pipes 5 move towards the direction of moving away from each other, until the upper chords 81 move to the curved segment of the sliding plate 6 and the lower chord 82 falls on the support of the column.

[0068] S4. Temporary support device removal: when the truss 8 is assembled, the fourth telescopic pipe 54, the third telescopic pipe 53 and the second telescopic pipe 52 are all retracted into the first telescopic pipe 51, the nuts are loosened and the abutting rod is rotated to make the abutting plate 42 separate from the column, and the positioning assembly 7 is detached from the base 1, the telescopic end of the hydraulic cylinder is shortened, so that the universal wheel 2 abuts against the ground, and then the base 1 is transferred.

[0069] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A temporary fixing device for a truss, characterized in that, include The base (1) is equipped with several casters (2) for driving the base (1) to move, and the base (1) has through holes (11) for accommodating the column. Support assembly (3), the support assembly (3) includes a hydraulic cylinder (32) disposed on the side wall of the base (1), the telescopic end of the hydraulic cylinder (32) facing the ground; Fastening assembly (4), the fastening assembly (4) is disposed on the base (1), the fastening assembly (4) is used to fix the base (1) to the column; Telescopic tube (5), which is slidably disposed on base (1), and the end of the telescopic tube (5) away from base (1) is used to support the upper chord (81). Positioning component (7), which is disposed on base (1) for positioning truss (8); The telescopic tube (5) is connected to an inclined sliding plate (6) at the end away from the base (1). The sliding plate (6) gradually approaches the column vertically, and the end of the sliding plate (6) close to the column is provided with a curved section. The base (1) is provided with a dovetail groove (12), and a dovetail block (13) is slidably arranged in the dovetail groove (12). The dovetail block (13) is fixedly connected to the end of the telescopic tube (5) away from the slide plate (6). A spring (14) is fixedly connected to the side wall of the dovetail groove (12), and the other end of the spring (14) is fixedly connected to the dovetail block (13). The positioning component (7) includes a hollow support rod (71) detachably connected to the base (1), a telescopic rod (72) is slidably arranged inside the support rod (71), a telescopic spring (73) is connected between one end of the telescopic rod (72) and the inner bottom wall of the support rod (71), and a retaining ring (74) for engaging the lower chord rod (82) is detachably connected to the other end of the telescopic rod (72).

2. The temporary fixing device for a truss according to claim 1, characterized in that, The fastening assembly (4) includes a threaded rod (41) that is threaded to the through hole (11). One end of the threaded rod (41) passes through the side wall of the through hole (11) and is connected to an abutment plate (42). The other end of the threaded rod (41) passes through the side wall of the base (1) and is threaded to a lock nut (43).

3. A temporary truss fixing device according to claim 1, characterized in that, The telescopic tube (5) includes a first telescopic tube (51), a second telescopic tube (52), a third telescopic tube (53), and a fourth telescopic tube (54). The second telescopic tube (52) is slidably disposed inside the first telescopic tube (51), the third telescopic tube (53) is slidably disposed inside the second telescopic tube (52), and the fourth telescopic tube (54) is slidably disposed inside the third telescopic tube (53). A driving component (56) is provided inside the first telescopic tube (51). The driving component (56) is used to simultaneously drive the second telescopic tube (52), the third telescopic tube (53), and the fourth telescopic tube (54) to move vertically.

4. A temporary truss fixing device according to claim 3, characterized in that, The inner wall of the first telescopic tube (51) is fixedly connected to a first rack (511), and the outer wall of the third telescopic tube (53) is fixedly connected to a third rack (532) opposite to the first rack (511). The two opposite side walls of the second telescopic tube (52) are provided with first through holes, and the first gears (521) that mesh with the first rack (511) and the third rack (532) are rotatably connected in the first through holes. The inner wall of the second telescopic tube (52) is fixedly connected to a second rack (522), and the outer wall of the fourth telescopic tube (54) is fixedly connected to a fourth rack (541) opposite to the second rack (522). The two opposite side walls of the third telescopic tube (53) are provided with second through holes, and the second through holes are rotatably connected to second gears (531) that mesh with the second rack (522) and the fourth rack (541) respectively. The drive assembly (56) is used to drive the second telescopic tube (52) to rise and fall.

5. A temporary truss fixing device according to claim 4, characterized in that, The drive assembly (56) includes a threaded screw (562) that is threadedly connected to the second telescopic tube (52), and a drive source (561) for driving the threaded screw (562) to rotate is provided on the inner bottom wall of the first telescopic tube (51).

6. A construction method for a steel structure space truss, using the truss temporary fixing device as described in any one of claims 1-5, characterized in that: Includes the following steps: S1. Truss (8) Ground assembly: Temporary supports are set up on the ground, and the upper chord (81) and lower chord (82) are assembled into an integral truss (8) on the temporary supports. S2. Fixing the temporary support device: Move the temporary support device to the column and fix the temporary support device to the column; S3. Lifting the truss (8); The assembled truss (8) is lifted into the shackle (74) by a crane and the truss (8) is lowered gradually until the lower chord (82) is fixed on the support of the column; S4. Temporary support device removal.

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