Auxiliary positioning structure for installation of large-span spherical steel grid

Abstract

The present invention belongs to the technical field of auxiliary positioning structures, and specifically relates to an auxiliary positioning structure for installing a large-span spherical steel grid frame, comprising a mobile frame and a clamping and positioning mechanism, wherein a walking mechanism and a centering mechanism are provided at the bottom of the mobile frame; the centering mechanism is provided with two, and the two centering mechanisms are respectively arranged on both sides of the bottom of the mobile frame; the centering mechanism comprises a centering telescopic cylinder and a supporting fixed plate, and the two ends of the centering telescopic cylinder are respectively fixedly connected to the mobile frame and the supporting fixed plate; the clamping and positioning mechanism comprises a fixed clamping plate and two clamping arms, and a lifting telescopic cylinder is provided between the fixed clamping plate and the top of the mobile frame. The movement of the whole is achieved through the walking mechanism; the whole can be supported and positioned with the welded bottom frame through the centering mechanism, thereby ensuring the relative position between the top ball node clamped by the clamping and positioning mechanism and the crossbar and the welded bottom frame, and avoiding the influence of uneven ground.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary positioning structures, and in particular relates to an auxiliary positioning structure for installing a large-span spherical steel grid. Background Art

[0002] There are significant differences in structural form and application between welded ball grid and bolted ball grid. Bolted ball grid uses high-strength bolts to connect solid balls and rods. All parts are standardized in the factory, and on-site installation is simple and fast. It is suitable for structures that require frequent maintenance or complex shapes, but its strength and service life are not as good as welded ball grid.

[0003] The welded ball grid connects the rods and hollow balls through on-site welding. It is suitable for large-span and high-load buildings and has high stable bearing capacity and compressive resistance.

[0004] When welding a large-span welded ball grid, it is necessary to ensure that the ball nodes and rods are accurately positioned to ensure the overall quality after welding. However, the existing technology uses hangers or manual installation and positioning, and the positioning process mainly relies on visual observation, which has poor positioning accuracy and is prone to cumulative errors, especially when welding the top ball node and the diagonal rod.

[0005] The utility model patent with patent application number 202121399731.X discloses an auxiliary anti-drop mechanism for the installation of steel structure grid. The mechanism clamps and fixes the grid steel pipe to be welded by clamping the pipe segment, the outer pipe segment and the first telescopic cylinder to prevent the grid steel pipe from falling during welding. The rotating plate, the first rotating shaft and the first motor can drive the grid steel pipe to rotate and maintain it at a certain angle, which is convenient for welding.

[0006] This mechanism can only clamp the steel pipe, but cannot position the steel pipe. The positioning process still mainly relies on naked eye observation, and the positioning accuracy is poor. Summary of the invention

[0007] In view of the above technical problems, the present invention provides an auxiliary positioning structure for the installation of a large-span spherical steel grid, which can perform auxiliary positioning during the welding installation process and can effectively reduce positioning errors.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] An auxiliary positioning structure for installing a large-span spherical steel grid comprises a moving frame and a clamping positioning mechanism, wherein a walking mechanism and a centering mechanism are arranged at the bottom of the moving frame; two centering mechanisms are arranged, and the two centering mechanisms are arranged at two sides of the bottom of the moving frame respectively; the centering mechanism comprises a centering telescopic cylinder and a supporting fixed plate, and the two ends of the centering telescopic cylinder are respectively fixedly connected to the moving frame and the supporting fixed plate;

[0010] The clamping and positioning mechanism includes a fixed clamping plate and two clamping arms, a lifting and telescopic cylinder is provided between the fixed clamping plate and the top of the movable frame; the two clamping arms are arranged opposite to each other and are both slidably connected with the fixed clamping plate; each clamping arm is provided with a ball fixing ring and a rod fixing piece; a double-headed telescopic cylinder is connected between the two clamping arms, and the double-headed telescopic cylinder is composed of two telescopic cylinders arranged back to back.

[0011] A slide plate is slidably connected to the top of the moving frame, and the lifting and telescopic cylinder is fixedly connected to the slide plate.

[0012] The rod body fixing member comprises a movable frame and a clamping roller. The movable frame is slidably connected to the clamping arm, and a compression spring is arranged between the movable frame and the clamping arm. The movable frame is rotatably connected to two clamping rollers.

[0013] The fixed clamping plate is fixedly connected with a counterweight by means of bolts.

[0014] An arc portion is provided at the front end of the supporting and fixing plate, and a vertical clamping plate is provided at the middle portion of the supporting and fixing plate.

[0015] The supporting fixing plate is provided with a lateral fixing assembly.

[0016] The lateral fixing assembly comprises a moving plate and a diagonal support plate; the moving plate is slidably connected to the supporting fixed plate, and a limiting top screw is arranged on the moving plate; the diagonal support plate and the moving plate are hinged, and a fixing bolt is arranged at the hinge.

[0017] The diagonal support plate is slidably connected with a clamping plate, and a corresponding connecting shaft is arranged on the clamping plate; and a fixing spring connected with the diagonal support plate is arranged on the connecting shaft.

[0018] The two ends of the clamping plate are hinged with pressure arms.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The overall movement is achieved through the walking mechanism; the overall body and the welded base frame can be supported and positioned through the centering mechanism, thereby ensuring the relative position between the top ball node clamped by the clamping and positioning mechanism and the crossbar and the welded base frame to avoid being affected by uneven ground.

[0021] The structural setting of the clamping and positioning mechanism can adapt to the clamping and fixing of top ball nodes and cross bars of different sizes. The height of the clamped top ball nodes and cross bars can be adjusted by the lifting and telescopic cylinder to facilitate accurate welding.

[0022] Through the structural setting of the lateral fixing assembly, the diagonal rod can be positioned and clamped to ensure the accuracy of the diagonal rod welding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of one aspect of the present invention;

[0024] Figure 2 It is a front view of the present invention;

[0025] Figure 3 is a side view of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the clamping and positioning mechanism of the present invention in one direction;

[0027] Figure 5 It is a structural schematic diagram of the clamping and positioning mechanism of the present invention in another direction;

[0028] Figure 6 It is a structural schematic diagram of the centering mechanism of the present invention;

[0029] Figure 7 It is a schematic diagram of the use state of the clamping and positioning mechanism of the present invention in one direction;

[0030] Figure 8 It is a schematic diagram of the use state of the clamping and positioning mechanism of the present invention in another direction;

[0031] Fig. 9 It is a schematic diagram of the use state of the present invention;

[0032] Fig.10 yes Fig. 9 A partial enlarged view of the middle A;

[0033] Among them: 1 is a moving frame, 10 is a slide plate, 2 is a clamping and positioning mechanism, 20 is a fixed clamping plate, 21 is a clamping arm, 22 is a lifting and telescopic cylinder, 23 is a spherical fixing ring, 24 is a rod fixing part, 240 is a movable frame, 241 is a clamping roller, 242 is a compression spring, 25 is a double-headed telescopic cylinder, 26 is a counterweight, 3 is a walking mechanism, 4 is a centering mechanism, 40 is a centering telescopic cylinder, 41 is a supporting and fixing plate, 410 is an arc-shaped portion, 411 is a vertical clamping plate, 42 is a lateral fixing component, 420 is a moving plate, 421 is a diagonal support plate, 422 is a limiting top screw, 423 is a fixing bolt, 424 is a clamping plate, 425 is a fixing spring, 426 is a pressure arm, 5 is a base frame, 6 is a top ball node, 7 is a cross bar, and 8 is a diagonal bar. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] like Figure 1-10As shown, an auxiliary positioning structure for installing a large-span spherical steel grid frame includes a moving frame 1 and a clamping positioning mechanism 2. A walking mechanism 3 and a centering mechanism 4 are provided at the bottom of the moving frame 1. The overall movement can be achieved through the walking mechanism 3, and a wheeled walking mechanism is preferably used.

[0036] There are two centering mechanisms 4, which are respectively arranged at both sides of the bottom of the mobile frame 1. The centering mechanism 4 includes a centering telescopic cylinder 40 and a supporting fixed plate 41. The two ends of the centering telescopic cylinder 40 are respectively fixedly connected to the mobile frame 1 and the supporting fixed plate 41. The two centering telescopic cylinders 40 are synchronously extended to make the two supporting fixed plates 41 move relatively to clamp the welded base frame 5.

[0037] The clamping and positioning mechanism 2 includes a fixed clamping plate 20 and two clamping arms 21. A lifting and telescopic cylinder 22 is provided between the fixed clamping plate 20 and the top of the movable frame 1. The height of the fixed clamping plate 20 can be changed by extending and retracting the lifting and telescopic cylinder 22, that is, the height of the clamped top ball node 6 and the cross bar 7 can be changed.

[0038] The two clamping arms 21 are arranged opposite to each other and are both slidably connected to the fixed clamping plate 20; each clamping arm 21 is provided with a ball fixing ring 23 and a rod fixing member 24; a double-headed telescopic cylinder 25 is connected between the two clamping arms 21, and the two ball fixing rings 23 and the rod fixing member 24 can move relative to or away from each other through the telescopic movement of the double-headed telescopic cylinder 25. The double-headed telescopic cylinder 25 is specifically composed of two telescopic cylinders arranged away from each other, the cylinder bodies of the two telescopic cylinders are fixedly connected, the piston rods of the two telescopic cylinders are respectively fixedly connected to the two clamping arms 21, and the cylinder bodies of the two telescopic cylinders are fixedly connected to the fixed clamping plate 20.

[0039] The specific method of use is as follows: It should be noted that, in the initial stage, only the top ball node 6 is clamped, and the top ball node 6 is welded and fixed to the base frame 5 through the diagonal rod 8; then the remaining top ball nodes 6 and cross rods 7 (the two have been welded in advance) are welded and fixed according to the following steps.

[0040] The whole is moved to the storage point of the top ball node 6 and the cross bar 7 through the walking mechanism 3; the top ball node 6 and the cross bar 7 are located in the clamping and positioning mechanism 2 by extending the lifting and telescopic cylinder 22, and the two ball fixing rings 23 and the two rod fixing parts 24 are retracted by retracting the double-headed telescopic cylinder 25 to make relative movement between them, thereby clamping the top ball node 6 and the cross bar 7.

[0041] Then, the whole structure is moved to the position of the welded base frame 5 through the walking mechanism 3; then, the two centering telescopic cylinders 40 are synchronously extended to make the two supporting fixing plates 41 move relatively, clamp the welded base frame 5, and support the auxiliary positioning structure through the base frame 5. That is, the whole structure is supported by the base frame 5 instead of the ground, which can effectively avoid the error between the base frame 5 and the ground due to unevenness, and ensure the position between the clamped top ball node 6 and the cross bar 7 and the welded base frame 5 is accurate.

[0042] Finally, according to the installation height of the top ball node 6, the lifting and telescopic cylinder 22 is extended and retracted accordingly; finally, the top ball node 6 and the bottom frame 5 are welded and fixed through the diagonal rod 8. After welding is completed, the double-headed telescopic cylinder 25 is extended to make the two ball fixing rings 23 and the two rod fixing parts 24 move away from each other, and the top ball node 6 and the cross bar 7 are no longer clamped; the above steps can be repeated to move and weld the whole.

[0043] Furthermore, a slide plate 10 is slidably connected to the top of the movable frame 1, and a lifting and telescopic cylinder 22 is fixedly connected to the slide plate 10; the clamping and positioning mechanism 2 can be pushed to move forward and backward as needed, thereby changing the front and rear positions of the clamped top ball node 6 and the cross bar 7.

[0044] Furthermore, the rod fixing member 24 includes a movable frame 240 and a clamping roller 241. The movable frame 240 is slidably connected to the clamping arm 21. A clamping spring 242 is provided between the movable frame 240 and the clamping arm 21. The two ends of the clamping spring 242 are respectively against the movable frame 240 and the clamping arm 21. Two clamping rollers 241 are provided, and both clamping rollers 241 are rotatably connected to the movable frame 240.

[0045] By setting the clamping roller 241, cross bars 7 of different sizes can be clamped; and by the structural setting of the compression spring 242, elastic compression can be achieved to avoid unnecessary damage to the cross bar 7.

[0046] Furthermore, in order to ensure the overall balance, a counterweight 26 is fixedly connected to the fixed clamping plate 20 by bolts.

[0047] Furthermore, an arc portion 410 is provided at the front end of the support and fixing plate 41 , and a vertical clamping plate 411 is provided in the middle of the support and fixing plate 41 , and a “T” shape is formed between the vertical clamping plate 411 and the bottom of the support and fixing plate 41 .

[0048] The two centering telescopic cylinders 40 are extended synchronously to make the two supporting fixed plates 41 move relative to each other, and the arc portion 410 first contacts the base frame 5, so that the auxiliary positioning structure is gradually lifted, so that there is a gap between the walking mechanism 3 and the ground, that is, the auxiliary positioning structure is supported by the base frame 5 instead of the ground. This can avoid the deviation between the clamped top ball node 6 and the crossbar 7 and the base frame 5 due to uneven ground. The centering telescopic cylinder 40 is extended until the vertical clamping plate 411 contacts the base frame 5, that is, the base frame 5 is clamped by the two vertical clamping plates 411, which plays a role in fixing the auxiliary positioning structure to the base frame 5 and avoiding unnecessary displacement during welding.

[0049] Furthermore, each supporting fixing plate 41 is provided with a lateral fixing assembly 42 , through which the diagonal rod 8 to be welded can be positioned to ensure the accuracy of its welding position.

[0050] Furthermore, the lateral fixing assembly 42 includes a moving plate 420 and a diagonal support plate 421; the moving plate 420 is slidably connected to the supporting and fixing plate 41. Specifically, the moving plate 420 and the supporting and fixing plate 41 can be slidably connected through a dovetail groove structure. The moving plate 420 is threadedly connected to a limiting top screw 422, which can pass through the moving plate 420 and abut against the supporting and fixing plate 41, thereby limiting the movement of the moving plate 420. The diagonal support plate 421 is hinged to the moving plate 420, and a fixing bolt 423 is provided at the hinge, that is, the hinge is achieved by bolting. The inclination angle between the diagonal support plate 421 and the moving plate 420 can be fixed by tightening the fixing bolt 423.

[0051] When in use, first adjust the position of the movable plate 420 according to the welding position of the inclined rod 8 and fix it through the limiting screw 422; then adjust the inclination angle between the fixed inclined support plate 421 and the movable plate 420 according to the required inclination angle of the inclined rod 8. Afterwards, when welding, the inclined rod 8 can be positioned by fitting the fixed inclined support plate 421 to the inclined rod 8.

[0052] Furthermore, the above structure requires manual fitting of the diagonal rod 8 and the fixed diagonal support plate 421. Although positioning can be achieved, there is still a certain inconvenience during welding. Therefore, the following structure is also provided: a clamping plate 424 is slidably connected to the diagonal support plate 421, and a corresponding connecting shaft is provided on the clamping plate 424; a fixing spring 425 connected to the diagonal support plate 421 is provided on the connecting shaft, and the fixing spring 425 is sleeved outside the connecting shaft, and the two ends of the fixing spring 425 are respectively against the end of the connecting shaft and the diagonal support plate 421.

[0053] During welding, first pull the clamping plate 424 inward to increase the distance between the clamping plate 424 and the diagonal support plate 421; then place the diagonal rod 8 to be welded between the clamping plate 424 and the diagonal support plate 421, and adjust the inclination angle of the diagonal rod 8; finally, remove the external force, release the elastic potential energy through the fixing spring 425, and the clamping plate 424 presses the diagonal rod 8.

[0054] Furthermore, pressing arms 426 are hinged at both ends of the clamping plate 424; when the clamping plate 424 is too long to hold the diagonal rod 8, the pressing arms 426 are rotated and unfolded to press the diagonal rod 8. When the clamping plate 424 is long enough to hold the diagonal rod 8, the pressing arms 426 are rotated and folded.

[0055] Only the preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments.

Claims

1. An auxiliary positioning structure for installing a large-span spherical steel grid, characterized in that: The invention comprises a moving frame (1) and a clamping and positioning mechanism (2), wherein a walking mechanism (3) and a centering mechanism (4) are provided at the bottom of the moving frame (1); two centering mechanisms (4) are provided, and the two centering mechanisms (4) are respectively arranged at two sides of the bottom of the moving frame (1); the centering mechanism (4) comprises a centering telescopic cylinder (40) and a supporting fixed plate (41), and two ends of the centering telescopic cylinder (40) are respectively fixedly connected to the moving frame (1) and the supporting fixed plate (41); The clamping and positioning mechanism (2) comprises a fixed clamping plate (20) and two clamping arms (21); a lifting and telescopic cylinder (22) is provided between the fixed clamping plate (20) and the top of the movable frame (1); the two clamping arms (21) are arranged opposite to each other and are both slidably connected to the fixed clamping plate (20); each clamping arm (21) is provided with a ball fixing ring (23) and a rod fixing member (24); a double-headed telescopic cylinder (25) is connected between the two clamping arms (21), and the double-headed telescopic cylinder (25) is composed of two telescopic cylinders arranged opposite to each other; The rod body fixing member (24) comprises a movable frame (240) and a clamping roller (241); the movable frame (240) is slidably connected to the clamping arm (21); a compression spring (242) is provided between the movable frame (240) and the clamping arm (21); the movable frame (240) is rotatably connected to two clamping rollers (241); The supporting fixing plate (41) is provided with a lateral fixing assembly (42); the lateral fixing assembly (42) comprises a movable plate (420) and a diagonal support plate (421); the movable plate (420) is slidably connected to the supporting fixing plate (41), and a limiting top screw (422) is provided on the movable plate (420); the diagonal support plate (421) and the movable plate (420) are hingedly connected, and a fixing bolt (423) is provided at the hinge; a clamping plate (424) is slidably connected to the diagonal support plate (421), and a corresponding connecting shaft is provided on the clamping plate (424); a fixing spring (425) connected to the diagonal support plate (421) is provided on the connecting shaft; and pressure arms (426) are hingedly connected at both ends of the clamping plate (424).

2. The auxiliary positioning structure for installing a large-span spherical steel grid according to claim 1 is characterized in that: The top of the movable frame (1) is slidably connected to a slide plate (10), and the lifting and telescopic cylinder (22) is fixedly connected to the slide plate (10).

3. The auxiliary positioning structure for installing a large-span spherical steel grid according to claim 1 is characterized in that: A counterweight block (26) is fixedly connected to the fixed clamping plate (20) via bolts.

4. The auxiliary positioning structure for installing a large-span spherical steel grid according to claim 1 is characterized in that: The front end of the supporting and fixing plate (41) is provided with an arc-shaped portion (410), and the middle portion of the supporting and fixing plate (41) is provided with a vertical clamping plate (411).

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