A semi-precast T-shaped topology flanged PEC secondary beam and its welding positioning device

Abstract

The present invention discloses a semi-precast T-shaped top-rolled PEC secondary beam and its welding positioning device, including a PEC beam body. A plurality of bolt holes are provided on the PEC beam body. Steel reinforcement cages are provided on both the front and rear sides of the PEC beam body. The steel reinforcement cages include a plurality of rectangular steel bars. A plurality of transverse tie bars are welded together among the plurality of rectangular steel bars. The lower ends of the plurality of rectangular steel bars are welded to the PEC beam body. The steel reinforcement cages are provided with through-hole tie bars. By opening the upper flange, the present invention can improve the combined action of the beam and the floor slab by means of lapping with the floor slab or casting in situ with the floor slab, improve the bearing capacity and stiffness of the beam, make full use of the components, have less steel consumption and are more economical. And through the setting of the positioning device, it can ensure that a plurality of rectangular steel bars are accurately positioned at the positions where welding is required, thereby improving the installation efficiency of the steel reinforcement cages on the PEC secondary beam.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a semi-precast T-shaped top-hat PEC secondary beam and its welding positioning device. Background Art

[0002] The secondary beam is located above the primary beam and mainly functions to transfer loads; at the intersection of the primary beam and the secondary beam, the primary beam can be regarded as the support of the secondary beam; the length of the secondary beam entering the primary beam only needs to meet the requirement of the anchorage length; the partially encased steel-concrete composite structure is a new type of steel-concrete composite structure formed by welding steel bars or studs in the H-shaped steel cavity and pouring concrete.

[0003] However, when the existing top-hat PEC beam is used as a secondary beam, the contribution of the upper flange to the bearing capacity is small, resulting in low overall bearing capacity and stiffness of the beam. At the same time, the components cannot be fully utilized, resulting in a large amount of steel used in the production of the secondary beam, greatly reducing the economy.

[0004] At the same time, when the existing PEC secondary beam is under construction, a steel reinforcement cage needs to be welded on it. Since the steel reinforcement cage contains rectangular steel bars and the rectangular steel bars need to be set vertically, currently it is generally manually welded. However, manual welding has certain requirements for the technical level of workers, and there may be problems in the welding process that do not meet the requirements, such as uneven weld height, different widths, inaccurate welding positions, etc., thus unable to ensure the quality of the subsequent welded steel reinforcement cage.

[0005] Therefore, it is necessary to design a semi-precast T-shaped top-hat PEC secondary beam and its welding positioning device to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies in the prior art, and a semi-precast T-shaped top-hat PEC secondary beam and its welding positioning device are proposed. By opening the upper flange, the combined action of the beam and the floor slab can be enhanced by means of overlapping with the floor slab or casting in situ with the floor slab, improving the bearing capacity and stiffness of the beam, making the components fully utilized, consuming less steel and being more economical. And through the setting of the positioning device, multiple rectangular steel bars can be accurately positioned at the positions where welding is required, thereby improving the installation efficiency of the steel reinforcement cage on the PEC secondary beam.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A semi-prefabricated T-shaped topological curled PEC secondary beam comprises a PEC beam body, the PEC beam body is provided with a plurality of bolt holes, a steel cage is provided on both the front and rear sides of the PEC beam body, the steel cage comprises a plurality of rectangular steel bars, a plurality of transverse tie bars are welded between the plurality of rectangular steel bars, the lower ends of the plurality of rectangular steel bars are welded to the PEC beam body, and the steel cage is provided with through-hole tie bars.

[0009] A semi-prefabricated T-shaped topology curling PEC secondary beam welding positioning device, comprising a base plate, the upper end of the base plate is fixedly connected to two vertical plates, a driving motor is installed on the left side of the vertical plate located on the left side, the output shaft end of the driving motor passes through the vertical plate and is fixedly connected to a threaded rod, a rectangular block is threadedly connected to the threaded rod, the upper end of the rectangular block is fixedly connected to two telescopic rods, the telescopic ends of the two telescopic rods are commonly fixedly connected to an arc block, the upper end of the arc block is provided with a plurality of placement grooves, the rectangular block is elastically connected to the adjacent surface of the arc block by a first spring, the upper end of the rectangular block is provided with a first electromagnet, and the upper end of the base plate is fixedly connected to two positioning blocks.

[0010] Preferably, a through opening is provided in the rectangular block, and a guide rod is fixedly connected to the right side of the vertical plate located on the left side, the guide rod passes through the through opening, and the guide rod is slidably connected to the inner wall of the through opening.

[0011] Preferably, the right side of the vertical plate located on the left side is rotatably connected to two rotating rods, and a rotating plate is fixedly connected to the two rotating rods. The upper ends of the two rotating plates are provided with vertical grooves, and adjustment plates are slidably connected in the two vertical grooves. The two adjustment plates are elastically connected to the inner bottom of the vertical grooves through a third spring, and the inner bottom of the two vertical grooves are installed with a third electromagnet.

[0012] Preferably, a mounting block is fixedly connected to the right side of the vertical plate located on the left side, a pneumatic rod is fixedly connected to the upper end of the mounting block, a moving block is fixedly connected to the telescopic end of the pneumatic rod, a rack is fixedly connected to the upper end of the moving block, a first gear is provided on each of the two rotating rods, and the first gear located on the front side is meshed with the rack.

[0013] Preferably, the right side of the vertical plate on the left side is rotatably connected with a short rod, the short rod is provided with a second gear, the second gear is meshed with the first gear on the rear side, and the short rod is transmission-connected to the rotating rod on the front side through a transmission assembly.

[0014] Preferably, a first pressure sensor is installed on the left side of the vertical plate located on the right side, second pressure sensors are provided at the inner bottoms of the plurality of placement grooves, the moving block is conductive, two contact pieces are provided on the vertical plate located on the left side, and pressing components are provided in the plurality of placement grooves. The pressing component includes moving grooves provided on the left and right sides of the placement groove, second electromagnets are provided on the opposite inner walls of the two moving grooves, clamping blocks are slidably connected in the two moving grooves, and the clamping blocks are elastically connected to the corresponding second electromagnets through second springs.

[0015] The present invention has the following beneficial effects:

[0016] 1. Compared with the prior art, by opening the upper flange, the combined action of the beam and the floor slab can be improved by means of overlapping with the floor slab or casting in situ with the floor slab. The lengths of the steel cages on both sides are increased and extended into the interior of the floor slab, improving the bearing capacity and stiffness of the beam, making full use of the components, and having less steel consumption and greater economy;

[0017] 2. Compared with the prior art, after placing rectangular steel bars in the plurality of placement grooves on the arc-shaped block, the operation of the driving motor can make the rectangular block move to the right, thereby moving the rectangular steel bars to the upper end of the PEC beam body, facilitating the staff to weld the rectangular steel bars equidistantly above the PEC beam body and improving the welding efficiency of the steel cage above the PEC beam body;

[0018] 3. Compared with the prior art, through the settings of the rotating plate and the adjusting plate, when the rectangular steel bars are inclined and hung on the arc-shaped block, by controlling the contraction of the pneumatic rod and driving the two rotating rods to rotate by means of the transmission component, the first gear and the second gear, the rectangular steel bars can be adjusted to be straight. At the same time, by energizing the third electromagnet to make the two adjusting plates move relatively, the position of the rectangular steel bars can be adjusted to avoid the situation where the positions corresponding to the steel bars are inaccurate during welding;

[0019] 4. Compared with the prior art, through the settings of the second electromagnet and the clamping blocks, after the position of the rectangular steel bars is adjusted, the two corresponding clamping blocks move relatively, which can limit the rectangular steel bars and avoid the situation where the rectangular steel bars are offset again during the movement.

[0020] In summary, the PEC secondary beam of the present invention is integrally cast with the floor slab, which can improve the bearing capacity and stiffness of the beam, reduce the steel consumption, improve the economy, and at the same time, through the settings of the adjusting plate and the rotating plate, the position of the rectangular steel bars can be adjusted so that the rectangular steel bars can be accurately welded at the predetermined position subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a semi-precast T-shaped topology crimped PEC secondary beam proposed by the present invention;

[0022] Figure 2 is a schematic structural diagram of the steel reinforcement cage;

[0023] Figure 3 is a schematic structural diagram after the steel reinforcement cage and the PEC secondary beam are installed;

[0024] Figure 4 is Figure 3 a schematic structural diagram of the installation of the through-hole tie bars in

[0025] Figure 5 a schematic structural diagram after the floor slab is poured;

[0026] Figure 6 is a three-dimensional schematic diagram of the PEC secondary beam welding positioning device;

[0027] Figure 7 is a rear three-dimensional structural schematic diagram of the PEC secondary beam welding positioning device;

[0028] Figure 8 is a plane cross-sectional view of the PEC secondary beam welding positioning device;

[0029] Figure 9 is Figure 8 an enlarged structural schematic diagram at position A in

[0030] Figure 10 is Figure 8 an enlarged structural schematic diagram at position B in

[0031] Figure 11 is Figure 8 a sectional view taken along the C-C direction in

[0032] Figure 12 is Figure 11 an enlarged structural schematic diagram at position D in

[0033] In the figure: 1 PEC beam body, 2 bolt holes, 3 transverse tie bars, 4 rectangular steel bars, 5 through-hole tie bars, 6 bottom plate, 7 vertical plate, 8 positioning block, 9 first pressure sensor, 10 mounting block, 11 pneumatic rod, 12 contact piece, 13 moving block, 14 rotating rod, 15 rotating plate, 16 adjusting plate, 17 threaded rod, 18 rectangular block, 19 first electromagnet, 20 arc-shaped block, 21 first spring, 22 telescopic rod, 23 driving motor, 24 guide rod, 25 placement groove, 26 second pressure sensor, 27 moving groove, 28 second electromagnet, 29 second spring, 30 third electromagnet, 31 rack, 32 first gear, 33 transmission component, 34 third spring, 35 vertical groove, 36 second gear, 37 short rod. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] Referring to Figures 1-12 , a semi-precast T-shaped topology crimped PEC secondary beam includes a PEC beam body 1. The upper flange of the PEC beam body 1 is replaced with an inverted T-shaped cross-section formed by a web and a lower flange. A plurality of bolt holes 2 are provided on the PEC beam body 1. Steel bar cages are provided on both the front and rear sides of the PEC beam body 1. The steel bar cages include a plurality of rectangular steel bars 4. A plurality of transverse tie bars 3 are welded together between the plurality of rectangular steel bars 4. The lower ends of the plurality of rectangular steel bars 4 are welded to the PEC beam body 1. The steel bar cage is provided with through-hole tie bars 5.

[0036] The present invention also proposes a welding positioning device for a semi-precast T-shaped topology crimped PEC secondary beam, which includes a bottom plate 6. Two vertical plates 7 are fixedly connected to the upper end of the bottom plate 6. A driving motor 23 is installed on the left side of the vertical plate 7 on the left side. The driving motor 23 is a servo motor and can drive the threaded rod 17 to rotate clockwise or counterclockwise. The end of the output shaft of the driving motor 23 penetrates through the vertical plate 7 and is fixedly connected to the threaded rod 17. A rectangular block 18 is threadedly connected to the threaded rod 17. Two telescopic rods 22 are fixedly connected to the upper end of the rectangular block 18. The telescopic ends of the two telescopic rods 22 are fixedly connected to an arc-shaped block 20. A plurality of placement grooves 25 are provided on the upper end of the arc-shaped block 20. The adjacent surfaces of the rectangular block 18 and the arc-shaped block 20 are elastically connected by a first spring 21. A first electromagnet 19 is provided on the upper end of the rectangular block 18. The arc-shaped block 20 is made of iron material. After the first electromagnet 19 is energized, it generates an attractive force on the arc-shaped block 20. A control switch is provided. The control switch can control the first electromagnet 19 to be energized for a period of time. During this time, the arc-shaped block 20 moves downward, so that the plurality of rectangular steel bars 4 are separated from the placement grooves 25, so that the rectangular block 18 can drive the arc-shaped block 20 to move back, facilitating the placement of the next rectangular steel bar 4. Two positioning blocks 8 are fixedly connected to the upper end of the bottom plate 6. Both of the two positioning blocks 8 are U-shaped and contact the left and right sides of the PEC beam body 1. And the width of the two positioning blocks 8 is twice the width of the PEC beam body 1. When welding, first make the rear side of the PEC beam body 1 contact the inner wall of the rear side of the positioning block 8, and weld a plurality of rectangular steel bars 4 on the front side of the PEC beam body 1. When it is necessary to weld rectangular steel bars to the rear side of the rectangular steel bars 4, only need to push the PEC beam body 1 forward so that the front side of the PEC beam body 1 contacts the inner walls of the front sides of the two positioning blocks 8. A through-port is provided in the rectangular block 18. A guide rod 24 is fixedly connected to the right side of the vertical plate 7 on the left side. The guide rod 24 penetrates through the through-port, and the guide rod 24 is slidably connected to the inner wall of the through-port.

[0037] Among them, the right side of the vertical plate 7 located on the left side is rotatably connected to two rotating rods 14, and the two rotating rods 14 are fixedly connected to rotating plates 15. The upper ends of the two rotating plates 15 are provided with vertical slots 35, and the two vertical slots 35 are slidably connected with adjustment plates 16. The two adjustment plates 16 are elastically connected to the inner bottom of the vertical slots 35 through third springs 34. The inner bottoms of the two vertical slots 35 are installed with third electromagnets 30. The two adjustment plates 16 are made of magnetic materials. When the third electromagnet 30 is energized, a repulsive force is generated on the two adjustment plates 16. An external power supply is provided. The external power supply, two contact pieces 12, a moving block 13 and the two third electromagnets 30 form a loop through wires. Copper wires are provided in the two adjustment plates 16. Conductive sheets are provided on the inner walls of the left and right sides of the two vertical slots 35. The external power supply, multiple conductive sheets, copper wires and multiple second electromagnets 28 form a loop through wires.

[0038] Among them, the right side of the vertical plate 7 on the left is fixedly connected with a mounting block 10, the upper end of the mounting block 10 is fixedly connected with a pneumatic rod 11, the telescopic end of the pneumatic rod 11 is fixedly connected with a moving block 13, the upper end of the moving block 13 is fixedly connected with a rack 31, and the two rotating rods 14 are each provided with a first gear 32, the first gear 32 located on the front side is meshed with the rack 31, and the right side of the vertical plate 7 on the left is rotatably connected with a short rod 37, the short rod 37 is provided with a second gear 36, the second gear 36 is meshed with the first gear 32 located on the rear side, the short rod 37 is connected to the rotating rod 14 on the front side through a transmission assembly 33, the transmission assembly 33 includes sprockets arranged on the front rotating rod 14 and the short rod 37, and the two sprockets are connected through chain transmission.

[0039] Among them, a first pressure sensor 9 is installed on the left side of the vertical plate 7 located on the right side, and a controller is provided. When multiple first pressure sensors 9 generate electrical signals, they will be transmitted to the controller. The controller controls the pneumatic rod 11 to contract. Second pressure sensors 26 are provided on the inner bottoms of multiple placement grooves 25. The second pressure sensors 26 generate electrical signals and transmit them to the controller. The controller controls the first pneumatic rod 11 to contract. At the same time, the controller controls multiple second electromagnets 28 to cut off power. The controller is connected in series in the circuit of the second electromagnet 28. The moving block 13 is conductive. Two contact pieces 12 are provided on the vertical plate 7 located on the left side. A clamping assembly is provided in each of the placement grooves 25. The clamping assembly includes a moving groove 27 arranged on the left and right sides of the placement groove 25. The inner walls of the two moving grooves 27 on the opposite sides are provided with a second electromagnet 28. The two moving grooves 27 are slidably connected with a clamping block, and the clamping block is elastically connected to the corresponding second electromagnet 28 through a second spring 29.

[0040] The functional principle of the present invention can be described through the following operation method: First, place the PEC beam body 1 between two positioning blocks 8 on the bottom plate 6, and then position multiple rectangular steel bars 4 at the upper end of the PEC beam body 1 through the welding positioning device. At this time, the staff can weld the PEC beam body 1 and the multiple rectangular steel bars 4, then adjust the position of the PEC beam body 1, and then weld multiple rectangular steel bars 4 on the rear side of the PEC beam body 1;

[0041] After the rectangular steel bars 4 are welded, multiple horizontal tie bars 3 can be fixed to the rectangular steel bars 4 at this time, and then multiple perforated tie bars 5 are installed. After the installation is completed, the PEC beam body 1 can be fixed to the columns on both sides through bolts, and then the PEC beam and the floor slab can be poured and formed together;

[0042] When the welding positioning device is used, first place multiple rectangular steel bars 4 into multiple placement grooves 25 in sequence. After multiple rectangular steel bars 4 are placed, at this time, multiple second pressure sensors 26 all generate electrical signals. These electrical signals are transmitted to the controller, and the controller controls the pneumatic rod 11 to contract, so that the moving block 13 drives the rack 31 to move downward, so that the rack 31 drives the front first gear 32 to rotate, so that the front rotating rod 14 rotates. At this time, the transmission component 33 drives the short rod 37 to rotate, so that the second gear 36 drives the rear first gear 32 and the rotating rod 14 to rotate, so that the two rotating plates 15 drive the corresponding adjusting plates 16 to rotate relatively;

[0043] During the placement process of the rectangular steel bar 4, due to the center reason, the upper left corner or upper right corner of the rectangular steel bar 4 may hang on the placement groove 25, so that the rectangular steel bar 4 tilts forward or backward. At this time, the two adjusting plates 16 rotate towards the middle to rotate the rectangular steel bar 4 to a vertical state;

[0044] When the two adjusting plates 16 both rotate to the horizontal state, at this time, the moving block 13 contacts the two contact pieces 12, so that the third electromagnet 30 is energized. After the third electromagnet 30 is energized, the third electromagnet 30 will generate a repulsive force on the corresponding adjusting plate 16, so that the two adjusting plates 16 move relatively, and then the rectangular steel bar 4 can be pushed, so as to ensure that the central axis of the rectangular steel bar 4 is aligned with the central axis of the placement groove 25;

[0045] When the two adjusting plates 16 move to the limit position, at this time, the position of the return-shaped steel has been adjusted. The copper wire will contact the two conductive sheets, so that multiple second electromagnets 28 are energized. After multiple second electromagnets 28 are energized, they will generate a repulsive force on the corresponding clamping blocks, so that the corresponding two clamping blocks move relatively, and then clamp the rectangular steel bar 4;

[0046] At this time, the drive motor 23 can be started to make the threaded rod 17 rotate clockwise, so that the rectangular block 18 drives the rectangular steel bar 4 to move to the right. When the rectangular block 18 contacts the first pressure sensor 9, a signal will be generated and transmitted to the controller at this time. The controller controls the power-off of multiple second electromagnets 28. Under the elastic action of the second spring 29, the multiple clamping blocks move back. At the same time, it controls the stretching of multiple pneumatic rods 11, so that the rotating plate 15 resets. During the reset process of the rotating plate 15, the moving block 13 separates from the two contact pieces 12, so that the adjusting plate 16 resets;

[0047] It is worth mentioning that since the clamping blocks are made of magnetic materials, there is a certain attraction to the rectangular steel bar 4. However, since the distances between the two clamping blocks and the rectangular steel bar 4 are the same, the attraction to the rectangular steel bar 4 is the same, so that the attractions of the two clamping blocks to the rectangular steel bar 4 cancel each other out, so that the rectangular steel bar 4 will not move when the clamping blocks move back;

[0048] At this time, the staff can weld multiple rectangular steel bars 4 on the PEC beam body 1. After the welding is completed, the first electromagnet 19 can be controlled to be energized for a period of time to make the first electromagnet 19 attract the arc-shaped block 20 to move downward, so that the rectangular steel bar 4 is separated from the placement groove 25. Then, the drive motor 23 is controlled to drive the threaded rod 17 to rotate counterclockwise to make the rectangular block 18 reset. After a period of time, the first electromagnet 19 is powered off, so that the arc-shaped block 20 resets;

[0049] Then, a new rectangular steel bar 4 is placed in the placement groove 25, and the PEC beam body 1 is moved, and then multiple rectangular steel bars 4 can be welded on the rear side of the PEC beam body 1 according to the above placement.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A welding positioning device for a semi - prefabricated T - shaped topology flanged PEC secondary beam, characterized in that, The secondary beam comprises a PEC beam body, the PEC beam body is provided with a plurality of bolt holes, a steel cage is provided on both the front and rear sides of the PEC beam body, the steel cage comprises a plurality of rectangular steel bars, a plurality of transverse tie bars are welded between the plurality of rectangular steel bars, the lower ends of the plurality of rectangular steel bars are welded to the PEC beam body, and the steel cage is provided with through-hole tie bars; The positioning device comprises a bottom plate, the upper end of which is fixedly connected to two vertical plates, a driving motor is installed on the left side of the vertical plate located on the left side, the output shaft end of the driving motor passes through the vertical plate and is fixedly connected to a threaded rod, a rectangular block is threadedly connected to the threaded rod, the upper end of the rectangular block is fixedly connected to two telescopic rods, the telescopic ends of the two telescopic rods are commonly fixedly connected to an arc block, the upper end of the arc block is provided with a plurality of placement grooves, the rectangular block is elastically connected to the adjacent surface of the arc block by a first spring, the upper end of the rectangular block is provided with a first electromagnet, and the upper end of the bottom plate is fixedly connected to two positioning blocks; A through opening is provided in the rectangular block, and a guide rod is fixedly connected to the right side of the vertical plate located on the left side, the guide rod passes through the through opening, and the guide rod is slidably connected to the inner wall of the through opening; The right side of the vertical plate on the left side is rotatably connected to two rotating rods, and the two rotating rods are fixedly connected to rotating plates, and the upper ends of the two rotating plates are provided with vertical slots, and the two vertical slots are slidably connected with adjustment plates, and the two adjustment plates are elastically connected to the inner bottom of the vertical slots through a third spring, and the inner bottoms of the two vertical slots are installed with third electromagnets; A mounting block is fixedly connected to the right side of the vertical plate on the left side, a pneumatic rod is fixedly connected to the upper end of the mounting block, a moving block is fixedly connected to the telescopic end of the pneumatic rod, a rack is fixedly connected to the upper end of the moving block, a first gear is provided on both of the two rotating rods, and the first gear located on the front side is meshed with the rack.

2. The welding positioning device for a semi - prefabricated T - shaped topology flanged PEC secondary beam according to claim 1, characterized in that: The right side of the vertical plate on the left side is rotatably connected with a short rod, on which a second gear is arranged, which is meshed with the first gear on the rear side, and the short rod is transmission-connected with the rotating rod on the front side through a transmission assembly.

3. The welding positioning device for a semi - prefabricated T - shaped topology flanged PEC secondary beam according to claim 2, characterized in that: A first pressure sensor is installed on the left side of the vertical plate on the right side, and a second pressure sensor is provided on the inner bottom of each of the plurality of placement grooves. The movable block is conductive, and two contact pieces are provided on the vertical plate on the left side. Each of the plurality of placement grooves is provided with a clamping assembly, and the clamping assembly includes movable grooves arranged on the left and right sides of the placement groove, and second electromagnets are provided on the inner walls on opposite sides of the two movable grooves, and clamping blocks are slidably connected in each of the two movable grooves, and the clamping blocks are elastically connected to the corresponding second electromagnets through a second spring.

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