Steel truss butt welding pipe fixing mechanism

Abstract

The utility model provides a steel truss butt welding pipe fixing mechanism which comprises a bottom plate, first fixing rings and a second fixing ring, the first fixing rings are correspondingly arranged at the two ends of the bottom plate, and the second fixing ring is arranged between the first fixing rings and connected with the first fixing rings through transmission rods. A plurality of first abutting pieces are distributed on the first fixing ring in the circumferential direction, and a plurality of second abutting pieces are distributed on the second fixing ring in the circumferential direction. The driver drives the transmission rod to rotate so as to drive the first abutting piece and the second abutting piece to move in the radial direction of the first fixing ring and the radial direction of the second fixing ring respectively. By means of the first fixing ring and the second fixing ring, the steel pipe is clamped and fixed in a multi-point mode, and deflection and displacement of the steel pipe are reduced; synchronous movement of the first abutting piece and the second abutting piece is achieved through all the structural components, the tedious operation of one-by-one movement of the first abutting piece and the second abutting piece is avoided, the operation process is simplified, and the abutting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a steel truss butt-welded pipe fixing mechanism. Background Art

[0002] When steel structure manufacturers process steel trusses, they need to dock and fix the steel pipes, construct the upper and lower chords of the steel trusses of specified lengths, and then arrange connecting rods between the upper and lower chords to form a steel truss. Generally, a fixing device is used to clamp and fix the steel pipe, but the traditional fixing device generally uses a single set of fixing rings, which has only one fixing point for the steel pipe, which is prone to the following problems:

[0003] (1) The steel pipe is long and heavy, and too few fixing points will cause the steel pipe to tilt easily, resulting in inaccurate docking of the two steel pipes;

[0004] (2) Generally, four or more bolts are installed on the fixing ring to adjust or fix the position of the steel pipe. Each bolt is independent of each other and needs to be rotated and adjusted one by one. Not only is the operation troublesome, but the adjustment distance of each bolt cannot be controlled, which will cause the steel pipe to tilt. The adjustment takes a very long time. Utility Model Content

[0005] The utility model aims to provide a steel truss butt-welded pipe fixing mechanism to solve the above-mentioned background problems.

[0006] The technical solution of the utility model is: a steel truss butt-welded pipe fixing mechanism, which comprises: a base plate, a first fixing ring and a second fixing ring, the first fixing ring being correspondingly arranged at both ends of the base plate, the second fixing ring being arranged between the first fixing rings and connected to the first fixing ring through a transmission rod; a plurality of first abutment members are distributed circumferentially on the first fixing ring, a plurality of second abutment members are distributed circumferentially on the second fixing ring, and a driver drives the transmission rod to rotate to drive the first abutment member and the second abutment member to move radially along the first fixing ring and the second fixing ring respectively.

[0007] Preferably, the first abutment member is slidably disposed in the inner cavity of the first fixing ring, and its outer wall is threadedly connected to the first worm gear; the second abutment member is slidably disposed in the inner cavity of the second fixing ring, and its outer wall is threadedly connected to the second worm gear; the first worm gear and the second worm gear are both engaged with the transmission rod.

[0008] Preferably, the transmission rod includes a first worm and a second worm, the first worm is rotatably arranged in the first fixing ring, the second worm is rotatably arranged in the second fixing ring, and at least one group of the first worm and the second worm corresponding to each other are connected.

[0009] Preferably, a first gear is provided at one end of the first worm, each of the first gears is meshed with a first gear ring, and the first gear ring is rotatably arranged on the first fixed ring; a second gear is provided at one end of the second worm, each of the second gears is meshed with a second gear ring, and the second gear ring is rotatably arranged on the second fixed ring; the first gear ring and / or the second gear ring are driven to rotate by the driver.

[0010] Preferably, the driver includes a first rotating handle, a driving rod and a transmission member, the transmission member is engaged with the first gear ring or the second gear ring, and the first rotating handle is fixed to one end of the driving rod to drive the driving rod and the transmission member to rotate.

[0011] Preferably, first sliding cavities are provided at both ends of the bottom plate, a first sliding block is provided in the first sliding cavity, a movable plate is provided on the top of the first sliding block, and the first fixing ring and the second fixing ring are provided on the movable plate.

[0012] Preferably, the first sliding cavity is provided with a first rotating rod, the first sliding block is threadedly sleeved on the outside of the first rotating rod, and a second rotating handle is provided at one end of the first rotating rod, and the second rotating handle is used to drive the first rotating rod to rotate.

[0013] Preferably, L-shaped limit blocks are provided on both sides of the movable plate, and the lateral ends of the L-shaped limit blocks are arranged opposite to each other and are slidably connected to the bottom plate.

[0014] Preferably, a second sliding cavity is provided on the movable plate, a second sliding block is provided in the second sliding cavity, and the second fixing ring is fixed on the top of the second sliding block.

[0015] Preferably, a second rotating rod is provided in the second sliding cavity, the second sliding block is threadedly sleeved on the outside of the second rotating rod, and a third rotating handle is provided at one end of the second rotating rod, and the third rotating handle is used to drive the second rotating rod to rotate.

[0016] The beneficial effects of the utility model are:

[0017] (1) The steel pipe is clamped and fixed at multiple points by the first fixing ring and the second fixing ring, thereby improving the stability of the steel pipe, reducing its skew displacement, and improving the docking accuracy and efficiency.

[0018] (2) The first abutment member and the second abutment member are moved synchronously by various structural components, avoiding the operation of moving them one by one to clamp or loosen the steel pipe, simplifying the operation process, reducing the complexity of the operation, and improving the docking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a usage state diagram of an embodiment of the utility model;

[0020] Figure 2 It is a partial cross-sectional view of an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the first fixing ring, the second fixing ring and the driver in the embodiment of the utility model;

[0022] Figure 4 It is a structural diagram of the first gear ring in the embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of the connection between the moving plate and the L-shaped limit block in the embodiment of the utility model;

[0024] Figure 6 It is a schematic structural diagram of the third turning handle in the embodiment of the utility model.

[0025] In the figure:

[0026] 1. Bottom plate; 1-1. First slide cavity; 1-2. Slide groove;

[0027] 2. The first fixing ring;

[0028] 3. Second fixing ring; 3-1. Annular groove;

[0029] 4. Transmission rod; 4-1. First worm gear; 4-2. Second worm gear; 4-3. Connecting rod;

[0030] 5. First abutment member; 5-1. First limit block; 5-2. First threaded rod; 5-3. First flexible pad;

[0031] 6. Second abutment member; 6-1. Second limit block; 6-2. Second threaded rod; 6-3. Second flexible pad;

[0032] 7. Driver; 7-1. First rotating handle; 7-2. Driving rod; 7-21. Third worm; 7-3. Transmission member; 7-31. Third gear; 7-32. Third worm wheel;

[0033] 8. First worm gear;

[0034] 9. Second worm gear;

[0035] 10. First gear;

[0036] 11. First gear ring;

[0037] 12. Second gear;

[0038] 13. Second gear ring;

[0039] 14. Install the block;

[0040] 15. Install the rod;

[0041] 16. Sliding rod;

[0042] 17. First slider;

[0043] 18. Moving plate; 18-1. Second sliding cavity;

[0044] 19. A first rotating rod;

[0045] 20. Second turning handle;

[0046] 21. Fourth worm gear;

[0047] 22. Fourth worm gear;

[0048] 23. L-shaped limit block;

[0049] 24. Second slider;

[0050] 25. Second rotating rod;

[0051] 26. The third turning handle; 26-1. The hexagonal connecting block; 26-11. The hexagonal groove; 26-2. The turning key. DETAILED DESCRIPTION

[0052] The technical solution of the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0053] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0054] Reference Figure 1-2The present embodiment provides a steel truss butt welded pipe fixing mechanism, which includes: a base plate 1, a first fixing ring 2, a second fixing ring 3, a transmission rod 4, a first abutment 5, a second abutment 6 and a driver 7. A first fixing ring 2 is provided on each side of the long end of the base plate 1, the positions of the two first fixing rings 2 correspond, and the axes are in the same direction as the length of the base plate 1; two second fixing rings 3 are provided between the two first fixing rings 2, the direction of the second fixing rings 3 is consistent with the direction of the first fixing rings 2, that is, the axis is in the same direction as the length of the base plate 1, and the first fixing rings 2 and the second fixing rings 3 that are close in position are connected by a transmission rod 4, and the transmission rod 4 is connected to the driver 7; there are a plurality of first abutment 5 distributed along the circumference of the first fixing ring 2, and a plurality of second abutment 6 distributed along the circumference of the second fixing ring 3, and the driver 7 drives the transmission rod 4 to rotate, so as to drive the first abutment 5 and the second abutment 6 to move along the radial direction of the first fixing ring 2 and the radial direction of the second fixing ring 3 respectively.

[0055] When the above mechanism is used to perform butt welding of steel trusses, firstly, two steel pipes are respectively inserted into the first fixing ring 2 and the second fixing ring 3 on both sides of the bottom plate 1, and the driver 7 is started to drive the transmission rod 4 to rotate, so that the first abutment 5 and the second abutment 6 are respectively close to the center of the first fixing ring 2 and the second fixing ring 3, and are pressed against the outer wall of the steel pipe to fix it. In the above process, each steel pipe is clamped and fixed by the first fixing ring 2 and the second fixing ring 3 on both sides of the bottom plate 1, and there are many fixing points, which can improve the stability and position accuracy of the clamped steel pipe; due to the setting of the transmission rod 4, the actions of the first abutment 5 and the second abutment 6 are synchronized, so that the clamping and loosening operations of the steel pipe can be completed only by operating the driver 7, reducing the labor intensity of the workers, and reducing the difficulty of adjustment when the position is fine-tuned during the butt welding of the two steel pipes; in addition, the pre-design of the size and position of the first abutment 5 and the second abutment 6 can accurately control the moving length of each first abutment 5 and the second abutment 6, accurately clamp the steel pipe, and reduce the time consumption of adjustment.

[0056] Reference Figure 3The first fixing ring 2 and the second fixing ring 3 are respectively provided with inner cavities for accommodating the first abutment member 5 and the second abutment member 6, and the inner cavities extend along the radial direction of the first fixing ring 2 or the second fixing ring 3. The first abutment member 5 is slidably arranged in the inner cavity of the first fixing ring 2, and one end thereof penetrates the side wall of the first fixing ring 2 toward the center of the first fixing ring 2, and the outer wall of the end is also connected with the first worm gear 8 by threads; the second abutment member 6 is slidably arranged in the inner cavity of the second fixing ring 3, and one end thereof penetrates the side wall of the second fixing ring 3 toward the center of the second fixing ring 3, and the outer wall of the end is also connected with the second worm gear 9 by threads; the first worm gear 8 and the second worm gear 9 are respectively rotatably arranged in the first fixing ring 2 and the second fixing ring 3, and both are engaged with the transmission rod 4. When the driver 7 drives the transmission rod 4 to rotate, the first worm gear 8 and the second worm gear 9 both rotate, so that the first abutment member 5 and the second abutment member 6 slide along the radial direction of the first fixing ring 2 and the second fixing ring 3 respectively to clamp or loosen the steel pipe. The self-locking effect between the worm wheel and the worm can effectively ensure the clamping force of the steel pipe and prevent the loosening from causing the steel pipe to skew and shift.

[0057] The first abutment member 5 comprises a first limit block 5-1, a first threaded rod 5-2 and a first flexible pad 5-3, the first limit block 5-1 and the first flexible pad 5-3 are respectively located at the two ends of the first threaded rod 5-2, wherein the first limit block 5-1 extends along the radial direction of the first threaded rod 5-2, and the side wall of the first limit block 5-1 abuts against the side wall of the inner cavity in the first fixing ring 2; the second abutment member 6 comprises a second limit block 6-1, a second threaded rod 6-2 and a second flexible pad 6-3, the second limit block 6-1 and the second flexible pad 6-3 are respectively located at the two ends of the second threaded rod 6-2, wherein the second limit block 6- 1 extends along the radial direction of the first threaded rod 5-2, and the side wall of the second limiting block 6-1 abuts against the side wall of the inner cavity in the second fixing ring 3; due to the limiting effect of the first limiting block 5-1 and the second limiting block 6-1, the first threaded rod 5-2 and the second threaded rod 6-2 can only move along their own axial direction under the driving effect of the first worm gear 8 and the second worm gear 9, but cannot rotate around their own axis, thereby achieving the clamping or loosening of the steel pipe; the first flexible pad 5-3 and the second flexible pad 6-3 directly contact the steel pipe, which can avoid the rigid materials in the first abutting member 5 and the second abutting member 6 from extruding and damaging the outer surface of the steel pipe.

[0058] In order to ensure the synchronization of the rotation of the first worm gear 8 and the second worm gear 9 and reduce the difficulty of operation, the above-mentioned transmission rod 4 is configured to include a first worm gear 4-1, a second worm gear 4-2 and a connecting rod 4-3. The first worm gear 4-1 is rotatably set in the first fixed ring 2, and the second worm gear 4-2 is rotatably set in the second fixed ring 3. Each first worm gear 4-1 is connected to each first worm gear 8, and a first gear 10 is fixedly provided at one end in the same direction of each first worm gear 4-1, and each first gear 10 is meshed with a first gear ring 11, and the first gear ring 11 is rotatably set on the first fixed ring 2; each second worm gear 4-2 is connected to each second worm gear 9, and a second gear 12 is fixedly provided at one end in the same direction of each second worm gear 4-2, and each second gear 12 is meshed with a second gear ring 13, and the second gear ring 13 is rotatably set on the second fixed ring 3; at least one group of first worm gears 4-1 and second worm gears 4-2 with corresponding positions are connected by a connecting rod 4-3, and the first gear ring 11 or the second gear ring 13 is driven to rotate by the driver 7.

[0059] Taking the connection between the first ring gear 11 and the driver 7 as an example, after the driver 7 is started, the first ring gear 11 rotates, driving the first gear 10 to rotate, causing the first worm 4-1 fixedly connected to the first gear 10 to rotate. On the one hand: it causes the first worm wheel 8 meshing with the first worm 4-1 to rotate, causing the first abutment 5 to slide radially along the first fixed ring 2. On the other hand: it causes the second worm 4-2 connected to the first worm 4-1 through the connecting rod 4-3 to rotate, thereby causing the second worm wheel 9 meshing with the second worm 4-2 to rotate, and causing the second gear 12 fixedly connected to the second worm 4-2 to rotate. The second gear 12 drives the second ring gear 13 to rotate, causing the other second gears 12, the second worm 4-2 and the second worm wheel 9 to rotate synchronously, causing the second abutment 6 to slide radially along the second fixed ring 3, thereby realizing the synchronous clamping or synchronous loosening of the steel pipe by each first abutment 5 and the second abutment 6.

[0060] The above-mentioned rotational connection method of the first gear ring 11 on the first fixed ring 2 and the rotational connection method of the second gear ring 13 on the second fixed ring 3 are both existing technologies and can be selected and configured according to actual needs. For example, an annular groove 3-1 can be opened on the side of the first fixed ring 2 and the second fixed ring 3, and a plurality of sliding rods 16 are arranged in the annular groove 3-1. One end of the sliding rod 16 can be rotatably slid in the annular groove 3-1, and the other end is fixedly connected to the plate surface of the first gear ring 11 or the second gear ring 13.

[0061] In a feasible implementation scheme, the driver 7 includes a first rotating handle 7-1, a driving rod 7-2 and a transmission member 7-3, the transmission member 7-3 is engaged with the first ring gear 11 or the second ring gear 13, and the first rotating handle 7-1 is fixed to one end of the driving rod 7-2 to drive the driving rod 7-2 and the transmission member 7-3 to rotate, thereby driving the first ring gear 11 and the second ring gear 13 to rotate.

[0062] The structure and arrangement of the driving rod 7-2 and the transmission member 7-3 can be configured according to actual use requirements. For example, the driving rod 7-2 can extend along the length direction of the base plate 1 and be rotatably set on the first fixed ring 2. The transmission member 7-3 uses a third gear 7-31 fixedly connected to the driving rod 7-2. The third gear 7-31 is meshed with the first ring gear 11. By rotating the driving rod 7-2, the third gear 7-31 is driven to rotate, and the first ring gear 11 can be driven to rotate. Of course, a fixed mounting block 14 and a mounting rod 15 can also be set on the side wall of the first fixed ring 2. The driving rod 7-2 adopts the third worm 7-21, and the transmission member 7-3 adopts the third gear 7-31 and the third worm wheel 7-32. The driving rod 7-2 vertically penetrates the mounting block 14, and the first rotating handle 7-1 is fixedly arranged at the top of the driving rod 7-2. The mounting rod 15 is located below the mounting block 14. The third gear 7-31 and the third worm wheel 7-32 are coaxially distributed and fixedly connected, and the third gear 7-31 and the third worm wheel 7-32 are both rotatably arranged on the mounting rod 15, and the third gear 7-31 is meshed with the first gear ring 11 (at this time, in order to facilitate the installation and use of the equipment, refer to the attached Figure 4 , the first gear ring 11 can be provided with teeth on both the inner and outer side walls, that is, the third gear 7-31 and the first gear 10 are respectively located on both sides of the first gear ring 11, and both are meshed with the first gear ring 11), and the third worm wheel 7-32 is meshed with the third worm 7-21. The above are only some exemplary implementation plans, and are not intended to limit the scope of protection of this application. Any selection of accessories and installation layout that meet the functions of the drive rod 7-2 and the transmission member 7-3 should be within the scope of protection of this application.

[0063] In addition to linking the adjustment of the first abutment 5 and the second abutment 6 to simplify the locking and adjustment operations and reduce construction time, a first sliding cavity 1-1 can also be set at both ends of the top surface of the base plate 1. The first sliding cavity 1-1 extends along the length direction of the base plate 1, and is provided with a first slider 17. The side wall of the first slider 17 abuts against the side wall of the first sliding cavity 1-1. A movable plate 18 is provided on the top of the first slider 17, and the first fixed ring 2 and the second fixed ring 3 are arranged on the movable plate 18. By changing the position of the movable plate 18, the steel pipes in the first fixed ring 2 and the second fixed ring 3 can be translated to realize the sliding docking of the two steel pipes. Compared with translating the steel pipes in the first fixed ring 2 and the second fixed ring 3 and then clamping and fixing them, this scheme can improve the operating convenience and docking efficiency.

[0064] In order to prevent the movable plate 18 from sliding randomly when the steel pipe is connected, a first rotating rod 19 can be arranged in the first sliding cavity 1-1. The first rotating rod 19 has the same extension direction as the first sliding cavity 1-1. The first sliding block 17 is threadedly sleeved on the outside of the first rotating rod 19. A second rotating handle 20 is arranged at one end of the first rotating rod 19. The second rotating handle 20 is used to drive the first rotating rod 19 to rotate. When the second rotating handle 20 is rotated, the first rotating rod 19 rotates. Under the restriction of the side wall of the first sliding cavity 1-1 on the first sliding block 17, the first sliding block 17 can only move along the length direction of the first rotating rod 19, but cannot rotate, so as to realize the translation of the movable plate 18. Moreover, under the restriction of the thread, if the second rotating handle 20 is not moved, the first sliding block 17 cannot move, and the position of the movable plate 18 can be kept fixed.

[0065] The first rotating rod 19 and the second rotating handle 20 mentioned above can be directly connected, or can be connected by using a fourth worm gear 21 and a fourth worm 22, wherein the fourth worm gear 21 is fixedly sleeved on the first rotating rod 19, the fourth worm 22 is meshed with the fourth worm gear 21, and one end of the fourth worm 22 extends out of the base plate 1 and is connected to the second rotating handle 20. Through the coordinated limiting effect of the thread and the teeth, the position stability of the first slider 17 and the movable plate 18 can be further improved.

[0066] Reference Figure 5 Since the size of the movable plate 18 is large, L-shaped limit blocks 23 can be set on both sides of the movable plate 18, and a slide groove 1-2 can be set on the side wall of the bottom plate 1. The extension direction of the slide groove 1-2 is the same as that of the first slide cavity 1-1. The horizontal ends of the L-shaped limit blocks 23 are relatively set and slidably set in the slide groove 1-2 on the side wall of the bottom plate 1 to improve the stability of the first slider 17 and the movable plate 18 during the movement process.

[0067] In addition to the above, a second sliding cavity 18-1 can be provided on the movable plate 18, the second sliding cavity 18-1 and the first sliding cavity 1-1 extend in the same direction, a second slider 24 is provided in the second sliding cavity 18-1, the side wall of the second slider 24 abuts against the side wall of the second sliding cavity 18-1, the second fixing ring 3 is fixedly provided on the top of the second slider 24, the first fixing ring 2 is fixedly provided on the movable plate 18, and the connecting rod 4-3 connecting the first worm 4-1 and the second worm 4-2 is adaptively configured as a telescopic rod with a locking function. By changing the position of the second slider 24 on the movable plate 18, the spacing between the first fixing ring 2 and the second fixing ring 3 can be changed to adapt to the clamping of steel pipes of different lengths.

[0068] In order to prevent the second fixed ring 3 from unplanned movement, a second rotating rod 25 can be arranged in the second sliding cavity 18-1. The second rotating rod 25 and the second sliding cavity 18-1 extend in the same direction. The second slider 24 is threadedly sleeved on the outside of the second rotating rod 25. A third rotating handle 26 is arranged at one end of the second rotating rod 25. The third rotating handle 26 is used to drive the second rotating rod 25 to rotate. When the third rotating handle 26 is rotated, the second rotating rod 25 rotates. Under the restriction of the side wall of the second sliding cavity 18-1 on the second slider 24, the second slider 24 can only move along the length direction of the second rotating rod 25, but cannot rotate, so as to realize the translation of the second fixed ring 3. Moreover, under the restriction of the thread, if the third rotating handle 26 is not moved, the second slider 24 cannot move, so that the position of the second fixed ring 3 can be kept fixed.

[0069] Since the first handle 7-1 and the second handle 20 may be frequently used when the steel truss is butt-welded, they can be set to a rod-shaped, disc-shaped structure suitable for holding, and the spacing between the first fixing ring 2 and the second fixing ring 3 is generally only adjusted once when the length of the steel pipe is determined. To prevent accidental touch, refer to the attached Figure 6 The third rotating handle 26 can be configured as an inner hexagonal connecting block 26-1 and a rotating key 26-2. The outer portion of the inner hexagonal connecting block 26-1 is cylindrical, one end of which is fixedly connected to the second rotating rod 25, and the other end is provided with a hexagonal prism groove. One end of the rotating key 26-2 is adapted to the shape of the hexagonal prism groove. When the rotating key 26-2 is installed on the inner hexagonal connecting block 26-1, the inner hexagonal connecting block 26-1 and the second rotating rod 25 can be driven to rotate synchronously. After adjusting the distance between the first fixing ring 2 and the second fixing ring 3, the rotating key 26-2 can be removed from the inner hexagonal connecting block 26-1.

[0070] The steps of using the above device to butt weld steel truss pipes include:

[0071] The third rotating handle 26 moves, driving the second rotating rod 25 to rotate, so that the second sliding block 24 moves in the second sliding cavity 18-1, and the distance between the first fixing ring 2 and the second fixing ring 3 is adjusted according to the length of the steel pipe;

[0072] The two steel pipes are respectively passed through the first fixing ring 2 and the second fixing ring 3 at both ends of the bottom plate 1, and the driver 7 is actuated to drive the first abutment member 5 and the second abutment member 6 to move synchronously toward the center of the first fixing ring 2 and the second fixing ring 3 respectively to clamp the steel pipes;

[0073] The second rotating handle 20 moves, driving the first rotating rod 19 to rotate, so that the first sliding block 17 moves in the first sliding cavity 1-1, and drives the moving plate 18 to move the two steel pipes closer to each other for docking and fixing.

[0074] Compared with the prior art, the beneficial effects of the utility model are:

[0075] (1) The first fixing ring 2 and the second fixing ring 3 are provided to clamp and fix the steel pipe at multiple points, thereby improving the stability of the steel pipe, reducing its skew displacement, and improving the docking accuracy and efficiency.

[0076] (2) The first abutment member 5 and the second abutment member 6 are moved synchronously by various structural components, avoiding the operation of moving them one by one to clamp or loosen the steel pipe, simplifying the operation process, reducing the complexity of the operation, and improving the docking efficiency.

[0077] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A steel truss butt welded pipe fixing mechanism, characterized in that: include: A base plate, a first fixing ring and a second fixing ring, wherein the first fixing ring is correspondingly arranged at both ends of the base plate, the second fixing ring is arranged between the first fixing rings and connected to the first fixing ring through a transmission rod; a plurality of first abutment members are distributed circumferentially on the first fixing ring, and a plurality of second abutment members are distributed circumferentially on the second fixing ring, and a driver drives the transmission rod to rotate to drive the first abutment member and the second abutment member to move radially along the first fixing ring and the second fixing ring respectively.

2. A steel truss butt welded pipe fixing mechanism according to claim 1, characterized in that: The first abutment member is slidably disposed in the inner cavity of the first fixing ring, and a first worm gear is threadedly connected to the outer wall of the first abutment member; the second abutment member is slidably disposed in the inner cavity of the second fixing ring, and a second worm gear is threadedly connected to the outer wall of the first abutment member; the first worm gear and the second worm gear are both engaged with the transmission rod.

3. A steel truss butt welded pipe fixing mechanism according to claim 1 or 2, characterized in that: The transmission rod includes a first worm and a second worm. The first worm is rotatably arranged in the first fixing ring, and the second worm is rotatably arranged in the second fixing ring. At least one set of the first worm and the second worm corresponding to each other are connected.

4. A steel truss butt welded pipe fixing mechanism according to claim 3, characterized in that: A first gear is provided at one end of the first worm gear, each of the first gears is meshed with a first gear ring, and the first gear ring is rotatably arranged on the first fixed ring; a second gear is provided at one end of the second worm gear, each of the second gears is meshed with a second gear ring, and the second gear ring is rotatably arranged on the second fixed ring; the first gear ring and / or the second gear ring are driven to rotate by the driver.

5. A steel truss butt welded pipe fixing mechanism according to claim 4, characterized in that: The driver includes a first rotating handle, a driving rod and a transmission member, wherein the transmission member is engaged with the first gear ring or the second gear ring, and the first rotating handle is fixed to one end of the driving rod to drive the driving rod and the transmission member to rotate.

6. A steel truss butt welded pipe fixing mechanism according to any one of claims 1-2, 4-5, characterized in that: The two ends of the bottom plate are provided with first sliding cavities, the first sliding cavity is provided with a first sliding block, the top of the first sliding block is provided with a moving plate, and the first fixing ring and the second fixing ring are provided on the moving plate.

7. A steel truss butt welded pipe fixing mechanism according to claim 6, characterized in that: The first sliding cavity is provided with a first rotating rod, the first sliding block is threadedly sleeved on the outside of the first rotating rod, and one end of the first rotating rod is provided with a second rotating handle, and the second rotating handle is used to drive the first rotating rod to rotate.

8. A steel truss butt welded pipe fixing mechanism according to claim 6, characterized in that: L-shaped limit blocks are arranged on both sides of the movable plate, and the lateral ends of the L-shaped limit blocks are arranged opposite to each other and are slidably connected to the bottom plate.

9. A steel truss butt welded pipe fixing mechanism according to claim 7 or 8, characterized in that: The movable plate is provided with a second sliding cavity, the second sliding cavity is provided with a second sliding block, and the second fixing ring is fixedly arranged on the top of the second sliding block.

10. A steel truss butt welded pipe fixing mechanism according to claim 9, characterized in that: A second rotating rod is arranged in the second sliding cavity, the second sliding block is threadedly sleeved on the outside of the second rotating rod, a third rotating handle is arranged at one end of the second rotating rod, and the third rotating handle is used for driving the second rotating rod to rotate.

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