CN114033103B - Construction process of prestressed steel concrete cast-in-place beam - Google Patents
Construction process of prestressed steel concrete cast-in-place beam Download PDFInfo
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- CN114033103B CN114033103B CN202111578451.XA CN202111578451A CN114033103B CN 114033103 B CN114033103 B CN 114033103B CN 202111578451 A CN202111578451 A CN 202111578451A CN 114033103 B CN114033103 B CN 114033103B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
- E04G21/123—Wire twisting tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
Abstract
The invention relates to the field of beam construction, and discloses a construction process of a prestressed steel reinforced concrete cast-in-place beam, which comprises the following steps: s1, communicating and designing TEKLA modeling to determine the opening position of the web plate and ensure that the post-tensioned corrugated pipe and the steel strand reasonably penetrate through the web plate; s2, performing reinforcement treatment on longitudinal stress steel bars at the bottom of the beam and steel bars at corners through reinforcement arrangement optimization; s3, optimizing the arrangement of prestressed steel strands and the design of a corrugated pipe, lifting the lowest point of the center of the corrugated pipe, ensuring the effective space between the corrugated pipe and a reinforcing steel bar, and pouring self-compacting concrete; according to the invention, through the matching among the rotating assembly, the air outlet assembly, the transmission assembly, the driving assembly and the like, the welding mechanism can be driven to stably move along the round mouth to finish annular welding, so that the interference with wing plates or other construction structures can be effectively avoided, and meanwhile, the welding quality can be effectively ensured; the air faucet can be continuously blown and can move synchronously along with the welding mechanism, so that the welding seam forming can be accelerated, the smoke generated by welding can be blown away, and the welding quality can be conveniently observed by workers.
Description
Technical Field
The invention relates to the technical field of beam construction, in particular to a construction process of a prestressed steel concrete cast-in-place beam.
Background
The beams are divided into three types: cast-in-place, prefabricated and assembled integrally; the cast-in-place is a beam formed by binding beam ribs, supporting a template and then pouring concrete.
Chinese patent publication No. CN208473116U discloses a partially prefabricated assembly type steel concrete web open-hole beam, which comprises a prefabricated U-shaped high-strength concrete groove; the web plate opening section steel is arranged in the prefabricated U-shaped high-strength concrete groove, and the length direction of the web plate opening section steel is parallel to the length direction of the groove; the steel sleeve is arranged at the web plate opening part of the web plate opening steel and is vertical to the groove length direction; has the advantages of convenient laying, low cost, etc.
The device is opened a hole and is welded the steel casing pipe at the web, because the position of opening a hole is indefinite, can have the condition of taking place to interfere with the upper and lower two parts of shaped steel when welding the steel casing, can't guarantee the holistic welding quality of annular again after the forced welding, has certain use limitation.
Therefore, it is necessary to provide a construction process for a prestressed steel reinforced concrete cast-in-place beam to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a construction process of a prestressed steel reinforced concrete cast-in-place beam, which aims to solve the problems that in the background art, due to the fact that the position of a hole is not fixed, the situation that the steel sleeve is interfered with the upper part and the lower part of the section steel when being welded exists, the welding quality cannot be guaranteed after forced welding, and the like.
In order to achieve the purpose, the annular automatic moving welding device is designed, so that interference is reduced, and the welding quality is guaranteed.
Based on the above thought, the invention provides the following technical scheme: the construction process of the prestressed steel reinforced concrete cast-in-place beam comprises the following steps:
s1, communicating and designing TEKLA modeling to determine the opening position of the web plate and ensure that the post-tensioned corrugated pipe and the steel strand reasonably penetrate through the web plate;
s2, reinforcing steel bars are longitudinally stressed at the bottom of the beam through reinforcing steel bar arrangement optimization, and reinforcing steel bars at corners are subjected to reinforcing steel bar combination treatment;
s3, optimizing the arrangement of prestressed steel strands and the design of a corrugated pipe, lifting the lowest point of the center of the corrugated pipe, ensuring the effective space between the corrugated pipe and a reinforcing steel bar, and pouring self-compacting concrete;
s4, optimizing the nodes of the steel prestressed beam and the steel column, increasing the horizontal haunching of the beam end, and gradually bending the two ends of the steel strand according to the ratio of 1:6 to realize prestressed tension;
wherein the corrugated pipe is perforated through the web in step S1, and the reinforced steel pipe is welded by the welding unit.
As a further scheme of the invention: the welding unit includes the mount pad, the constant head tank has been seted up on the surface of mount pad, the fixed surface of mount pad installs electric putter and air outlet assembly, electric putter's expansion end fixed mounting has the casing of being connected with air outlet assembly can be dismantled, the surface of casing runs through and has seted up the round mouth, the surface of casing runs through and slidable mounting has the runner assembly who corresponds with the round mouth, the runner assembly includes welding mechanism and air cock, the transmission assembly who is connected with the runner assembly transmission is installed in the inside rotation of casing, the transmission assembly includes quarter butt and the outside flabellum of fixed mounting at the quarter butt, the outside cover of flabellum is equipped with the drive assembly who all switches on with casing fixed connection and air cock and air outlet assembly.
As a further scheme of the invention: the subassembly of giving vent to anger includes with mount pad fixed connection and with the sleeve of drive assembly switch-on, the sleeve surface runs through and slidable mounting has the stock, the one end fixed mounting of stock can follow the gliding piston piece of sleeve, the surface of stock just is located telescopic inside cover and is equipped with the spring, the other end fixed mounting of stock can dismantle the square of being connected with the casing.
As a further scheme of the invention: the surface of the square block is provided with a clamping groove, and the surface of the shell is penetrated and movably provided with a bolt matched with the clamping groove in size.
As a further scheme of the invention: the driving assembly comprises a housing which is sleeved outside the fan blade and fixedly connected with the housing, and a hose communicated with the air tap and an air pipe communicated with the air outlet assembly are communicated with the surface of the housing.
As a further scheme of the invention: the short rod is rotatably connected with the inner wall of the shell, and a gear in transmission connection with the rotating assembly is fixedly mounted on the outer surface of the short rod.
As a further scheme of the invention: and a ferrule is fixedly arranged on the outer surface of the short rod and between the gear and the driving component.
As a further scheme of the invention: the rotating assembly comprises a circular ring in sliding fit with the shell, the welding mechanism and the air faucet are fixedly connected with the circular ring, and a toothed ring in transmission connection with the transmission assembly is fixedly mounted on the outer wall of the circular ring.
As a further scheme of the invention: the outer fixed surface of casing installs one-way admission valve, fixed mounting has one-way air outlet valve on the trachea, the surface cover of quarter butt is equipped with the coil spring.
Compared with the prior art, the invention has the beneficial effects that: through the matching among the rotating assembly, the air outlet assembly, the transmission assembly, the driving assembly and the like, the welding mechanism can be driven to stably move along the round mouth to finish annular welding, so that the interference with wing plates or other construction structures can be effectively avoided, and meanwhile, the welding quality can be effectively ensured; the air faucet can be continuously blown and can move synchronously along with the welding mechanism, so that the welding seam forming and the smoke generated by welding can be accelerated, the welding quality can be conveniently observed by workers, and the whole practicability is higher.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a front perspective view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of the mounting base structure of the present invention;
FIG. 4 is a perspective view of the internal structure of the housing of the present invention;
FIG. 5 is an enlarged view of the structure at B in FIG. 4;
FIG. 6 is a right side view of the internal structure of the housing of the present invention;
FIG. 7 is an enlarged view of the structure at C in FIG. 6;
FIG. 8 is a schematic structural diagram of a gas outlet device according to the present invention;
FIG. 9 is a schematic view of the driving assembly of the present invention;
fig. 10 is a rear perspective view of the overall structure of the present invention.
In the figure: 1. a mounting seat; 2. an electric push rod; 3. a housing; 4. a rotating assembly; 5. an air outlet assembly; 6. a transmission assembly; 7. a drive assembly; 8. positioning a groove; 9. a bolt; 10. a round mouth; 401. a circular ring; 402. a welding mechanism; 403. an air tap; 404. a toothed ring; 501. a sleeve; 502. a long rod; 503. a piston block; 504. a spring; 505. a square block; 601. a short bar; 602. a gear; 603. a coil spring; 604. a fan blade; 605. a ferrule; 701. a housing; 702. a hose; 703. the trachea.
Detailed Description
The first embodiment is as follows:
referring to fig. 1 to 4, the present embodiment provides a construction process of a prestressed steel reinforced concrete cast-in-place beam, which is mainly applied to the construction of a Y-direction prestressed beam with 1-16 and 1-17 axes of six layers of high-rise commercial skirt houses, and includes the following steps,
optimization of prestressed steel concrete beam design
Modeling and drawing a steel structure through TEKLA software in advance, determining the positions of steel strands and grouting corrugated pipes according to the linear arrangement of prestressed steel wires of a structural beam and the position relation of structural steel bars, finding an unreasonable place, communicating with the design in time, re-optimizing, finally determining the specific opening position of a section steel member, and reinforcing the reserved opening of a section steel web plate in a steel structure workshop; particularly, the corrugated pipe penetrates through a hole of a web plate of the steel beam vertical to the prestressed tendon, a reinforced steel pipe needs to be welded, and the corrugated pipe is positioned inside the reinforced steel pipe; when the unbonded prestressed tendon penetrates through the web plate of the steel beam, the reinforcing steel plates are additionally welded on the two sides of the web plate.
The sum is as follows: and the TEKLA modeling is adopted to determine the opening position of the web plate through communication design, so that the post-tensioned corrugated pipe and the steel strand can be ensured to reasonably penetrate through the web plate.
Second, the design optimization of the prestressed steel concrete beam
The dense reinforcing steel bars easily cause the difficulty of reinforcing steel bar binding, and the difficulty of concrete pouring is particularly increased; by optimally designing the reinforcing bars, the number of 34 phi h25 steel bars is reduced to 25 phi h25, two rows of reinforcing bars are reduced, and meanwhile, a reinforcing bar combining method is adopted to ensure the space for the downward flow of concrete.
The sum is as follows: through the optimization of the reinforcing bars, the longitudinal stress reinforcing bars at the beam bottom and the reinforcement combination treatment of the reinforcing bars at the corners are realized.
And thirdly, during construction of the beam rib, a plurality of construction parties roughly calculate the position of the prestressed reinforcement according to a plurality of positioning numbers given by design, and the prestressed steel strand is fixed according to two or three meters and one positioning point during construction. In the embodiment, each prestressed steel strand is deeply designed according to a positioning point of 1 meter strictly, and the height of the prestressed steel strand from the top of the beam is calculated every 1 meter, so that accurate positioning is realized; and calculating the shape of the prestressed steel stranded wire, and upwardly offsetting the lowest point of the center of the corrugated pipe to a certain distance from the steel bar so as to ensure concrete pouring.
Meanwhile, the conventional concrete pouring method is broken through in the embodiment, the beam is dense in reinforcing steel bars, the beam is provided with the steel reinforced beam and the corrugated pipe, the concrete pouring is very difficult, and in order to ensure that the concrete pouring is compact, the self-compacting concrete is adopted on site. Pouring concrete starts from one side of the steel rib, and a person specially assigned to the other side of the steel rib uses a flashlight to check whether the concrete flows from the bottom of the steel beam or not until the concrete at the bottom of the steel beam is completely poured and compacted, and then pouring the concrete from one end of the beam to the other end of the beam according to a conventional method.
The sum is as follows: the prestressed steel strand arrangement and the corrugated pipe design are optimized, the lowest point of the center of the corrugated pipe is raised, the effective space of the corrugated pipe and a reinforcing steel bar is guaranteed, and self-compacting concrete pouring is applied.
Horizontal haunch at stretching end of prestressed steel concrete beam
Y that is located high-rise commercial skirt house six layers 1-16, 1-17 axle is to prestressed beam length nearly 45m, and this roof beam compares in traditional concrete beam, and its beam muscle is extremely its intensive and arrange complicacy, has contained shaped steel bone, prestressing tendons and ordinary reinforcing bar, and the end design of straining leads to unable realization stretch-draw at roof beam, post end. Therefore, the design is definitely optimized to be horizontal haunches, namely the beam end is changed into the horizontal haunches, and the two ends of the steel strand are gradually bent according to the ratio of 1:6, so that the tensioning of the prestressed tendons is ensured.
The sum is as follows: optimizing the joints of the profile steel prestressed beams and the steel columns, increasing the horizontal haunch of the beam ends, and gradually bending the two ends of the steel stranded wires according to the ratio of 1:6 to realize prestressed tension.
In the first step of welding the reinforced steel pipe, because the steel beam is mostly I-shaped steel, the upper horizontal part and the lower horizontal part of the steel beam are wing plates, and the middle vertical part of the steel beam is a web plate, when the steel pipe is welded in a web plate hole, because the position of the hole is not fixed, when the distance between the hole and the wing plate is small, the welding not only can seriously interfere with the wing plate, but also can interfere with other construction structures, so that the welding is difficult, the reinforced steel pipe cannot be annularly and effectively welded, and the welding quality cannot be ensured after forced welding; in the embodiment, the welding unit is used for completing the welding of the reinforced steel pipe, so that the interference between the welded steel pipe and wing plates and other construction structures can be well avoided, the welding can be smoothly completed, and the welding quality can be ensured.
The welding unit comprises a mounting seat 1, a positioning groove 8 matched with the wing plate in size is formed in the surface of the mounting seat 1, and when the welding unit is used, the mounting seat 1 is inserted into the wing plate through the positioning groove 8, so that the mounting seat 1 is positioned; an electric push rod 2 and an air outlet assembly 5 are fixedly arranged on the surface of the mounting seat 1, a shell 3 is fixedly arranged at the movable end of the electric push rod 2, the shell 3 is fixed with the air outlet assembly 5 through a bolt 9, the shell 3 and the air outlet assembly 5 can be separated after the bolt 9 is taken down, the bolt 9 is not taken down in an initial state, and the shell 3 and the air outlet assembly 5 are relatively fixed; the surface of the shell 3 is provided with a round opening 10 in a penetrating way, and the round opening 10 corresponds to the reinforced steel pipe and then the mounting seat 1 is fixed when in use.
The shell 3 is designed in a U shape, the surface of the shell 3 is provided with a circular hole communicated with the round opening 10 in a penetrating manner, the rotating assembly 4 is arranged in the circular hole in a sliding manner, the rotating assembly 4 comprises a welding mechanism 402 and an air nozzle 403, the welding mechanism 402 can realize welding between a reinforced steel pipe and a web plate, the air nozzle 403 can blow air to a welding area, welding seam forming is accelerated, smoke generated by welding is blown away, welding quality is guaranteed, workers can observe a welding seam quickly and clearly, the welding mechanism 402 and the air nozzle 403 are both the existing mature technologies, and detailed description is omitted; the transmission assembly 6 in transmission connection with the rotating assembly 4 is installed in the shell 3 in a rotating mode, the transmission assembly 6 comprises a short rod 601 and fan blades 604 fixedly installed on the outer portion of the short rod 601, a driving assembly 7 fixedly connected with the inner wall of the shell 3 is sleeved on the outer portion of the fan blades 604, and the driving assembly 7 is communicated with the air nozzle 403 and the air outlet assembly 5 respectively and used for achieving stable air supply of the air nozzle 403.
In the present embodiment, it is preferable that: when the fixing device is used, the center of the round opening 10 is aligned to the reinforcing steel pipe, and then the mounting base 1 is moved towards the web plate, so that the positioning groove 8 is inserted into the wing plate to effectively fix the mounting base 1 and the shell 3; then starting the electric push rod 2 to drive the shell 3 to move towards the web, driving the air outlet assembly 5 to synchronously move by the shell 3, finishing air suction by the air nozzle 403 and the driving assembly 7 by the air outlet assembly 5, driving the transmission assembly 6 to rotate when the air passes through the driving assembly 7, driving the rotating assembly 4 to rotate by the transmission assembly 6, and having no influence on the rotation of the rotating assembly 4 because the rotating assembly does not correspond to the to-be-welded part of the reinforced steel pipe and the web at the moment and the welding mechanism 402 is not started; close electric putter 2 after casing 3 offsets with the web, casing 3 and the subassembly 5 of giving vent to anger no longer remove this moment, welding mechanism 402 and gas nozzle 403 also with wait to weld the department and correspond, then start welding mechanism 402 and pull out bolt 9 and make the subassembly 5 of giving vent to anger automatic exhaust, gas is discharged from gas nozzle 403 through drive assembly 7, gas drives drive assembly 6 and rotating assembly 4 antiport when driving assembly 7, welding mechanism 402 removes automatic completion welding along round mouth 10 this moment, and gas nozzle 403 follows welding mechanism 402 after, continue to jet-blast the region after the welding.
Through the matching of the structures such as the air outlet assembly 5, the rotating assembly 4, the transmission assembly 6 and the driving assembly 7, the welding mechanism 402 can be driven to move along the round opening 10 to complete annular welding, so that the rapid welding between the reinforced steel pipe and the web plate can be realized, and through the arrangement of the shell 3 and the round opening 10, the interference with a wing plate or other construction structures can be effectively avoided, and the welding device can be well applied even if the distance between the opening of the web plate and the wing plate is small; meanwhile, because the welding is automatically carried out along the circular ring of the round opening 10, the problem of pause or manipulation in manual welding does not exist in the middle, and the welding quality can be effectively ensured; through the cooperation of drive assembly 7, subassembly 5 and air cock 403 isotructure of giving vent to anger, when welding mechanism 402 welds, can be so that air cock 403 follows welding mechanism 402 synchronous motion along round mouth 10, continuously blows to the region after the welding, and then can accelerate the welding seam shaping and blow away the flue gas that the welding produced for the observation welding seam that the staff can be clear fast, holistic practicality is higher.
The second embodiment:
referring to fig. 1 to 10, in the first embodiment, the air outlet assembly 5 includes a sleeve 501 fixedly connected to the mounting base 1 and communicated with the driving assembly 7, a long rod 502 is slidably mounted on the surface of the sleeve 501 close to the housing 3, a piston block 503 capable of sliding along the inner wall of the sleeve 501 is fixedly mounted at one end of the long rod 502, and the sleeve 501, the long rod 502 and the piston block 503 are combined to form a closed piston structure; a spring 504 is sleeved on the outer surface of the long rod 502 and inside the sleeve 501 and used for resetting the long rod 502 and the piston block 503 after moving; the other end of the long rod 502 is fixedly provided with a block 505 embedded in the housing 3, the surface of the block 505 is provided with a clamping groove matched with the size of the bolt 9, after the block 505 is embedded in the housing 3, the bolt 9 is inserted to realize the positioning of the block 505 (the housing 3 is provided with a through hole for the bolt 9 to pass through), and the long rod 502 and the piston block 503 are also positioned.
The driving component 7 comprises a housing 701 which is sleeved outside the fan blades 604 and fixedly connected with the inner wall of the shell 3, and a circular cavity for accommodating the fan blades 604 is formed inside the housing 701; an air pipe 703 and a hose 702 which are symmetrically arranged by taking the short rod 601 as a symmetry axis are communicated with the surface of the housing 701, the air pipe 703 extends to the outside of the shell 3 and is fixedly connected with the sleeve 501, the hose 702 is long and is communicated with the air nozzle 403, and then the air nozzle 403, the hose 702, the circular cavity for accommodating the fan blades 604, the air pipe 703 and the sleeve 501 are communicated; the air pipe 703 is arranged at a position of the housing 701 close to the right side wall, and the hose 702 is arranged at a position of the housing 701 close to the bottom (fig. 9), so that the air can drive the inner fan blades 604 to rotate when passing through the circular cavity; when the air nozzle 403 rotates along the circular opening 10, the hose 702 is driven to rotate one turn in the housing 3.
The short rod 601 is rotatably connected with the inner wall of the shell 3, the gear 602 in transmission connection with the rotating assembly 4 is fixedly mounted on the outer surface of the short rod 601, and the ferrule 605 is also fixedly mounted on the outer surface of the short rod 601, in this embodiment, the ferrule 605 is disposed between the gear 602 and the housing 701 and is used for increasing the outer diameter of the short rod 601 so as to allow the long hose 702 to be completely wound, because the diameter of the reinforced steel pipe in construction is limited, the size of the shell 3 is also limited, and the diameter of the short rod 601 is smaller, so it is necessary to increase the outer diameter by setting the ferrule 605 to ensure that the hose 702 is completely wound; in the initial state, the hose 702 is scattered in the housing 3, and the hose 702 is completely wound when the ferrule 605 rotates one turn with the short rod 601.
The rotating assembly 4 comprises a circular ring 401 in sliding fit with the annular hole, the welding mechanism 402 is fixedly mounted on the inner wall of the circular ring 401, the air nozzle 403 penetrates through the circular ring 401 and is fixedly connected with the circular ring 401, a gear ring 404 in transmission connection with the gear 602 is fixedly mounted on the outer wall of the circular ring 401 (namely, the inner part of the shell 3), and when the gear ring 404 drives the circular ring 401 to rotate for one circle, the welding mechanism 402 and the air nozzle 403 can be driven to synchronously move for one circle.
In the present embodiment, it is preferable that: when in use, the mounting seat 1 and the shell 3 are effectively fixed by the matching of structures such as the round opening 10, the positioning groove 8 and the like; then starting the electric push rod 2 to drive the shell 3 to move towards the web, driving the square 505 to synchronously move by the matching of the bolt 9 and the clamping groove of the shell 3, driving the piston block 503 to move along the sleeve 501 and extruding the spring 504 by the square 505 through the long rod 502, so that the sleeve 501 completes air suction sequentially through the air nozzle 403, the hose 702, the circular cavity and the air pipe 703, the air can drive the internal fan blades 604 to rotate when passing through the circular cavity, the fan blades 604 drive the short rod 601 to rotate, and the short rod 601 drives the gear 602 and the ferrule 605 to rotate; the loose hose 702 is rolled up by the ferrule 605 when rotating, the gear ring 404 drives the gear ring 404 to rotate when rotating, the gear 602 drives the welding mechanism 402 and the air nozzle 403 to rotate one circle along the round opening 10 through the ring 401, and because the welding mechanism 402 is not started and does not correspond to the to-be-welded part of the reinforced steel pipe and the web at the moment, the hose 702 is only rolled up by one circle at the moment without other influences.
When the shell 3 abuts against the web, the electric push rod 2 is closed, at this time, the shell 3, the block 505, the rod 502 and the piston block 503 do not move any more, the welding mechanism 402 and the air nozzle 403 also correspond to the position to be welded, then the welding mechanism 402 is started and the bolt 9 is pulled out, the bolt 9 releases the limit of the clamping groove of the block 505, under the action of the spring 504, the block 505, the rod 502 and the piston block 503 automatically reset, the gas in the sleeve 501 passes through the air pipe 703, the circular cavity, the hose 702 and the air nozzle 403 in sequence to complete automatic exhaust, the gas drives the inner fan blades 604 to rotate reversely when passing through the circular cavity, the fan blades 604 drive the gear 602 and the ferrule 605 to rotate reversely through the short rod 601, the ferrule 605 gradually releases the coiled hose 702 when rotating reversely, the gear 602 drives the welding mechanism 402 and the air nozzle 403 to rotate reversely for one circle along the circular opening 10 through the toothed ring 404, the welding mechanism 402 automatically completes the welding of the joint of the reinforced steel pipe and the web when rotating for one circle, and the air nozzle 403 moves synchronously with and ejects air after the welding mechanism 402.
Through the matching of the structures such as the gear 602, the toothed ring 404, the fan blades 604 and the piston block 503, the welding mechanism 402 can be driven to move along the round opening 10 to complete annular welding, and further, the rapid welding between the reinforced steel pipe and the web plate can be realized; through the arrangement of the toothed ring 404, the round mouth 10 and the toothed ring 404, the welding mechanism 402 is driven to complete annular movement, so that the interference between the welding mechanism 402 and a wing plate or other construction structures can be effectively avoided, the welding mechanism is well applicable even if the distance between the open hole of the web plate and the wing plate is small, a plurality of base plates (not shown in the figure) are inserted into the positioning groove 8, the initial heights of the shell 3 and the round mouth 10 can be further changed, the welding mechanism is applicable to more open hole positions, and the overall applicability is stronger; meanwhile, the welding mechanism 402 moves continuously along the round opening 10 for one circle, so that the problem of pause or manipulation in manual welding does not exist in the middle, the welding quality can be effectively ensured, and the labor burden of workers is reduced; through the matching of the structures such as the short rod 601, the fan blade 604, the circular cavity, the ferrule 605 and the like, the hose 702 can be prepared and rolled before the welding mechanism 402 performs welding, so that the hose 702 is gradually released during welding, the hose 702 is prevented from being continuously scattered as before welding during welding, the normal operation of the internal structure of the shell 3 is influenced, meanwhile, if the hose 702 is continuously scattered and does not pass through rolling, the hose 702 is likely to be bent at a certain position when the hose 702 returns along with the rotation of the air nozzle 403, the gas circulation is influenced, certain use limitation exists, and the problem can be solved by the preparation and rolling of the hose 702; through the cooperation of ring gear 404, hose 702, gear 602 and round mouth 10 isotructure, can be so that air cock 403 follows welding mechanism 402 synchronous motion along round mouth 10, continuously blows to the region after the welding, and then can accelerate the welding seam shaping and blow away the flue gas that the welding produced for the observation welding seam that the staff can be clear fast, further guarantee welding quality, satisfied more demands in the in-service use.
Example three:
referring to fig. 1 to 10, on the basis of the second embodiment, a one-way air inlet valve (fig. 8) is fixedly installed on one side of the outer surface of the housing 3 close to the air pipe 703, a one-way air outlet valve is fixedly installed on the air pipe 703, and by arranging the one-way air inlet valve, the piston block 503 can be pumped from the outside when being away from the sleeve 501 along with the long rod 502 instead of being pumped from the air pipe 703, and the one-way air inlet valve and the one-way air outlet valve are the existing mature technologies and will not be described in detail herein; a coil spring 603 is sleeved on the outer surface of the short rod 601, and by arranging the coil spring 603, when the short rod 601 rotates, the coil spring 603 is driven to be stressed, so that the short rod 601 tends to rotate reversely; in this embodiment, the hose 702 is already completely wound outside the ferrule 605 in the initial state.
In the present embodiment, it is preferable that: when the electric push rod 2 is started to drive the shell 3, the block 505 and the piston to move along the sleeve 501 and press the spring 504, air is sucked from the outside through the one-way air inlet valve, and at the moment, the fan blades 604, the short rod 601, the ferrule 605, the gear 602 and the toothed ring 404 do not rotate, so that the hose 702 keeps a rolling state and the welding mechanism 402 and the air nozzle 403 do not move; when the shell 3 abuts against the web plate, the electric push rod 2 is closed, then the welding mechanism 402 is started and the bolt 9 is pulled out, under the action of the spring 504, the square 505, the long rod 502 and the piston block 503 are automatically reset, the gas in the sleeve 501 sequentially passes through the air pipe 703, the circular cavity, the hose 702 and the air nozzle 403 to complete automatic exhaust, the gas drives the internal fan blades 604 to reversely rotate when passing through the circular cavity, the fan blades 604 drive the gear 602, the ferrule 605 and the coil spring 603 to reversely rotate through the short rod 601, the ferrule 605 gradually releases the hose 702 in a rolling state when reversely rotating, the gear 602 drives the welding mechanism 402 and the air nozzle 403 to reversely rotate for one circle along the circular opening 10 through the gear ring 404 to complete welding, and the air nozzle 403 synchronously moves and injects air after following the welding mechanism 402; when the piston block 503 is not fed after being reset in the sleeve 501, at this time, under the action of the coil spring 603, the short rod 601, the gear 602 and the ferrule 605 rotate, the sleeve 501 winds the hose 702 which is gradually discharged again when rotating, the gear 602 drives the welding mechanism 402 to rotate for one turn through the gear ring 404 and the circular ring 401, at this time, the opening and closing of the welding mechanism 402 are determined by observing a welding area by a worker, if the welding area of one turn of reverse rotation is to be thickened, or when a part of segments need to be subjected to repair welding, the opening state of the welding mechanism 402 can be continuously maintained, the repair welding is completed by one turn of the welding mechanism 402, if the welding quality of one turn of reverse rotation reaches the standard, the welding mechanism 402 can be closed, and at this time, the welding mechanism 402 does not have any influence when rotating for one turn.
In the second embodiment, the hose 702 is always in a scattered state in the initial state, and is wrapped around the side of the housing 3 away from the round opening 10 for a long time, so that the hose 702 may have a deep crease, and the later gas conduction and the overall service life are affected; meanwhile, the hose 702 is coiled and scattered, when the hose moves along with the shell 3 and the mounting seat 1, the hose can interfere with the gear 602 and the gear 602, so that the internal structure is blocked to influence the whole operation, a large-area partition plate needs to be arranged if the hose does not need to be blocked, the shell 3 is divided forwards and backwards through the partition plate, the hose 702 is separated from the gear 602 and the gear ring 404, the large-area partition plate needs to increase the working cost again, the hose is complex to install and has certain use limitation. Compared with the second embodiment, through the matching of the short rod 601, the coil spring 603, the one-way air inlet valve, the one-way air outlet valve and other structures, the hose 702 can be adjusted to be in an overall rolling state in the initial state, so that the problems of gas conduction and service life caused by the crease lines and blocking of internal structures are well avoided, the rotation of the short rod 601 is multifunctional, and the functionality of the short rod 601 is improved; the gradual release of the hose 702 can also be realized when welding is performed, so that the continuous air injection of the air nozzle 403 can be realized to ensure the stable air exhaust of a welding area; after welding, the hose can be automatically rolled, long-term scattering and coil nesting of the hose 702 are avoided, gas conduction, longer service life and normal operation of the whole structure of the hose 702 are guaranteed, and the practicability is higher.
The working principle of the invention is as follows: when in use, the center of the round opening 10 is aligned to the reinforced steel pipe, and the mounting seat 1 and the shell 3 are effectively fixed through the matching of the round opening 10 and the positioning groove 8; then the electric push rod 2 is started to drive the shell 3 to move towards the web, the shell 3 drives the square block 505 to synchronously move through the matching of the bolt 9 and the clamping groove, the square block 505 drives the piston block 503 to move along the sleeve 501 through the long rod 502 and extrude the spring 504, the sleeve 501 sucks air from the outside through the one-way air inlet valve, and at the moment, the fan blades 604, the short rod 601, the ferrule 605, the gear 602, the toothed ring 404, the welding mechanism 402 and the air nozzle 403 are not moved; when the shell 3 abuts against the web plate, the electric push rod 2 is closed, then the welding mechanism 402 is started and the bolt 9 is pulled out, under the action of the spring 504, the square 505, the long rod 502 and the piston block 503 are automatically reset, gas in the sleeve 501 sequentially passes through the air pipe 703, the one-way gas outlet valve, the circular cavity, the hose 702 and the gas nozzle 403 to complete automatic exhaust, the gas passes through the circular cavity and is matched with the structures such as the fan blades 604, the short rod 601, the gear 602, the ferrule 605 and the like, the welding mechanism 402 and the gas nozzle 403 are driven to rotate reversely for one circle along the circular opening 10, the welding mechanism 402 completes welding after moving for one circle, the ferrule 605 keeps gas injection along with the gradual release of the hose 702 and synchronously moves along with the welding mechanism 402;
when the piston block 503 is not supplying air any more after being reset in the sleeve 501, at this time, under the action of the coil spring 603, the short rod 601, the gear 602 and the ferrule 605 rotate, the sleeve 501 winds up the gradually-released hose 702 again when rotating, and the gear 602 drives the welding mechanism 402 to rotate one more circle along the round opening 10 through the matching of the structures such as the toothed ring 404 and the round ring 401; at this time, the operator can determine the on/off of the welding mechanism 402 according to the quality of the welding area, if the welding quality needs to be enhanced, the opening state of the welding mechanism 402 can be kept, the welding mechanism 402 rotates one turn to complete repair welding, and if the welding quality reaches the standard, the welding mechanism 402 can be closed.
Claims (5)
1. The construction process of the prestressed steel reinforced concrete cast-in-place beam is characterized by comprising the following steps of:
s1, communicating and designing TEKLA modeling to determine the opening position of the web plate and ensure that the post-tensioned corrugated pipe and the steel strand reasonably penetrate through the web plate;
s2, reinforcing steel bars are longitudinally stressed at the bottom of the beam through reinforcing steel bar arrangement optimization, and reinforcing steel bars at corners are subjected to reinforcing steel bar combination treatment;
s3, optimizing the arrangement of prestressed steel strands and the design of a corrugated pipe, lifting the lowest point of the center of the corrugated pipe, ensuring the effective space between the corrugated pipe and a reinforcing steel bar, and pouring self-compacting concrete;
s4, optimizing the nodes of the steel prestressed beam and the steel column, increasing the horizontal haunching of the beam end, and gradually bending the two ends of the steel strand according to the ratio of 1:6 to realize prestressed tension;
wherein the corrugated pipe passes through the web opening hole in step S1, and the reinforced steel pipe is welded by the welding unit;
the welding unit comprises a mounting seat, a positioning groove is formed in the surface of the mounting seat, an electric push rod and an air outlet assembly are fixedly mounted on the surface of the mounting seat, a shell detachably connected with the air outlet assembly is fixedly mounted at the movable end of the electric push rod, a round opening is formed in the surface of the shell in a penetrating mode, a rotating assembly corresponding to the round opening is mounted on the surface of the shell in a penetrating and sliding mode, the rotating assembly comprises a welding mechanism and an air faucet, a transmission assembly in transmission connection with the rotating assembly is rotatably mounted inside the shell, the transmission assembly comprises a short rod and a fan blade fixedly mounted outside the short rod, and a driving assembly fixedly connected with the shell and communicated with the air faucet and the air outlet assembly is sleeved outside the fan blade;
the air outlet assembly comprises a sleeve fixedly connected with the mounting seat and communicated with the driving assembly, a long rod penetrates through the surface of the sleeve and is slidably mounted on the surface of the sleeve, a piston block capable of sliding along the sleeve is fixedly mounted at one end of the long rod, a spring is sleeved on the outer surface of the long rod and positioned inside the sleeve, and a square block detachably connected with the shell is fixedly mounted at the other end of the long rod;
the driving assembly comprises a housing which is sleeved outside the fan blade and fixedly connected with the housing, and a hose communicated with the air tap and an air pipe communicated with the air outlet assembly are communicated with the surface of the housing.
2. The construction process of the prestressed steel reinforced concrete cast-in-place beam according to claim 1, wherein a clamping groove is formed in the surface of the square block, and a bolt matched with the clamping groove in size penetrates through and is movably arranged on the surface of the shell.
3. The construction process of the prestressed steel reinforced concrete cast-in-place beam according to claim 1, wherein the short rod is rotatably connected with the inner wall of the housing, and a gear in transmission connection with the rotating assembly is fixedly installed on the outer surface of the short rod.
4. The construction process of the prestressed steel reinforced concrete cast-in-place beam according to claim 3, wherein a ferrule is fixedly installed on the outer surface of the short rod and between the gear and the driving assembly.
5. The construction process of the prestressed steel reinforced concrete cast-in-place beam according to claim 1, wherein the rotating assembly comprises a circular ring in sliding fit with the shell, the welding mechanism and the air nozzle are fixedly connected with the circular ring, and a toothed ring in transmission connection with the transmission assembly is fixedly installed on the outer wall of the circular ring.
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| JPH0810943A (en) * | 1994-06-30 | 1996-01-16 | Nkk Corp | Manufacture of steel tube column for filling concrete |
| CN107838596A (en) * | 2017-10-27 | 2018-03-27 | 孙洪军 | A kind of intelligent automatic welding device applied widely based on Internet of Things |
| CN208473116U (en) * | 2018-07-02 | 2019-02-05 | 西安建筑科技大学 | A kind of partial precast assembly steel reinforced concrete holes in soffit beam |
| CN113172368A (en) * | 2021-05-18 | 2021-07-27 | 温刚滔 | Fabricated steel structure embedded base manufacturing and welding processing system |
| CN214721827U (en) * | 2021-02-24 | 2021-11-16 | 中国水利水电第六工程局有限公司 | Pressure steel pipe tile and stiffening ring group are to construction system |
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2021
- 2021-12-22 CN CN202111578451.XA patent/CN114033103B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0810943A (en) * | 1994-06-30 | 1996-01-16 | Nkk Corp | Manufacture of steel tube column for filling concrete |
| CN107838596A (en) * | 2017-10-27 | 2018-03-27 | 孙洪军 | A kind of intelligent automatic welding device applied widely based on Internet of Things |
| CN208473116U (en) * | 2018-07-02 | 2019-02-05 | 西安建筑科技大学 | A kind of partial precast assembly steel reinforced concrete holes in soffit beam |
| CN214721827U (en) * | 2021-02-24 | 2021-11-16 | 中国水利水电第六工程局有限公司 | Pressure steel pipe tile and stiffening ring group are to construction system |
| CN113172368A (en) * | 2021-05-18 | 2021-07-27 | 温刚滔 | Fabricated steel structure embedded base manufacturing and welding processing system |
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