Curved surface web reinforcing type steel secondary beam for steel cord plant

Abstract

The utility model discloses a curved surface web reinforcing type steel secondary beam for a steel cord plant. The curved surface web reinforcing type steel secondary beam comprises an upper flange plate, a lower flange plate; the curved web is rolled by a numerical control plate rolling machine, the upper end and the lower end of the curved web are fixedly connected with the upper flange plate and the lower flange plate respectively, and the length of the curved web in the horizontal direction is smaller than the length of the upper flange plate and the length of the lower flange plate; the number of the reinforcing connecting plates is two, the reinforcing connecting plates are fixedly connected to the two ends of the curved-surface web respectively, the upper ends and the lower ends of the reinforcing connecting plates are fixedly connected with the upper flange plate and the lower flange plate respectively, and the ends of the two reinforcing connecting plates are flush with the two ends of the upper flange plate respectively. The curved web rolled by the numerical control plate rolling machine is low in cost, the curved web is in curve path connection with the upper flange plate and the lower flange plate, the reinforcing connecting plates are welded to the two ends of the curved web, on one hand, connection can be reinforced, on the other hand, the curved web can be used as run-on plates, automatic equipment can be utilized to the maximum extent for machining and manufacturing, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the steel structure design of a steel cord workshop, in particular to a curved web reinforced steel secondary beam for a steel cord workshop. Background Art

[0002] With the continuous improvement of people's living standards and the accelerating urban development speed, the application of steel structure buildings in the construction field is becoming more and more extensive, especially in the construction of high-rise buildings, stations, stadiums, schools and other projects.

[0003] In the daily construction process, as the main load-bearing component of a building, the selected specifications, materials and other parameters of the steel beam need to be verified for the practicality and rationality of the design through accurate calculation and analysis data. Generally speaking, there are many types of steel beam models, and the more common ones are HM and HN steel beams. HM refers to the H-shaped steel with medium flange, that is, the flange width of the H-shaped steel is slightly smaller than the web height, and the ratio of the web height to the flange width is approximately 1.33 - 1.75, which is mainly used as an equipment platform and as a frame beam in the frame structure bearing dynamic loads; HN is the H-shaped steel with narrow flange, that is, the flange width of the H-shaped steel is much smaller than the web height, and the ratio of the web height to the flange width is greater than or equal to 2, which is mainly used for main beams and secondary beams. In the construction of industrial workshops, secondary beams are generally designed to be distributed above the main beams and at the same elevation as the main beams, mainly playing the role of transferring loads. For the floor of a steel deck with dense equipment, the structural design requires a smaller spacing and a large number of secondary beams. Therefore, this utility model can save materials to a large extent and simplify the manufacturing process. By using the reinforced curved web steel beam, the compressive strength of the roof and the resistance to external influences such as wind, rain and snow can be greatly improved, so that ventilation equipment, photovoltaic power generation equipment, etc. can be installed on the factory building roof according to needs, achieving the purpose of increasing the value of the constructed building facilities.

[0004] Due to the professionalism of its production process and supply and auxiliary systems, the steel cord workshop is different from ordinary industrial workshops. The steel cord workshop has strict requirements for the workshop environment. In a space of nearly 100,000 m², it is necessary to strictly control its temperature and humidity and ensure the airtightness of the workshop interior. There are many equipment units in the production workshop, and the pipelines of water, electricity, HVAC, gas, etc. are intricate, and there are high load requirements for equipment platforms or pipe supports, which requires a large number of steel secondary beams to be installed to support the above requirements.

[0005] In the existing patent CN 211114083 U, a corrugated web H-shaped steel beam connection node structure is disclosed. Refer to Figure 1-2, in the figure: 1. Corrugated web H-shaped steel beam, 11. Upper plate, 12. Lower plate, 13. Corrugated web, 14. Reinforcing plate, 15. Wave-shaped groove, 2. Splice flange plate, 3. Right-angled triangular plate, 4. Steel plate. The corrugated web used is formed by stamping. The usage amount of the main beam is very small and it can be used as the main beam. However, when used as the secondary beam, its manufacturing cost is high. Summary of the Invention

[0006] In view of the problems existing in the prior art, the present utility model provides a curved web reinforced steel secondary beam for a steel cord workshop. The curved web is formed by a numerical control rolling machine, with low cost. Since the curved web is connected to the upper and lower flange plates by a curved path, reinforcing connection plates are welded at both ends of the curved web. On the one hand, it can strengthen the connection, and on the other hand, it is used as an arc starting plate. During welding, first spot-weld the curved web and then automatically weld. Without this reinforcing connection plate, during automated welding, the end is prone to over / stack welding or insecure welding. However, with the reinforcing connection plate used as the arc starting plate in this application, this problem does not exist, and the automated equipment can be maximally utilized for processing and manufacturing, reducing labor costs.

[0007] The technical solution adopted by the present utility model is: a curved web reinforced steel secondary beam for a steel cord workshop, comprising:

[0008] Upper flange plate;

[0009] Lower flange plate, having the same specification as the upper flange plate;

[0010] A curved web formed by a numerical control rolling machine, with the upper and lower ends of the curved web respectively fixedly connected to the upper flange plate and the lower flange plate, and the length of the curved web in the horizontal direction being less than the lengths of the upper flange plate and the lower flange plate;

[0011] Reinforcing connection plates, there are two, respectively fixedly connected to both ends of the curved web, with the upper and lower ends of the reinforcing connection plates respectively fixedly connected to the upper flange plate and the lower flange plate, and the ends of the two reinforcing connection plates being flush with the two ends of the upper flange plate respectively.

[0012] On the basis of the above solution, preferably, the fixing method between the curved web, the reinforcing connection plates, the upper flange plate, and the lower flange plate is welding fixation.

[0013] On the basis of the above solution, preferably, the bending radius R of the curved web is 1.2 - 1.5H, and the chord height is 1 / 11 - 1 / 9H, where H is the width of the upper flange plate.

[0014] On the basis of the above solution, preferably, the bending radius R of the curved web is 1.3H, and the chord height is 1 / 10H.

[0015] On the basis of the above - mentioned solution, preferably, in the width direction of the upper flange plate, the reinforcement connecting plate evenly divides the upper flange plate.

[0016] On the basis of the above - mentioned solution, preferably, the reinforcement connecting plate has mounting holes.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] First: When the area of the mezzanine in the steel cord workshop is large and there are requirements for high load - bearing and dynamic load use, a large number of curved web - reinforced secondary steel beams are selected, reducing the input of raw materials;

[0019] Second: It not only improves the compressive strength of the secondary steel beam and is more conducive to installation, but also can better improve the prominent problems in on - site assembly and improve work efficiency;

[0020] Third: The manufacturing process is simplified, and automated equipment can be used for processing and manufacturing to the greatest extent, reducing labor costs;

[0021] Fourth: The accuracy and quality of the processing process are better controlled, and the process is easy to understand, which is conducive to processing and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram in an existing patent.

[0023] Figure 2 It is a perspective view in an existing patent.

[0024] Figure 3 It is a schematic structural diagram of the upper flange plate of the utility model.

[0025] Figure 4 It is a schematic structural diagram of the curved web of the utility model.

[0026] Figure 5 It is an assembly drawing of the lower flange plate and the curved web of the utility model.

[0027] Figure 6 It is a perspective view of the utility model.

[0028] Figure 7 It is a schematic structural diagram of the reinforcement connecting plate of the utility model.

[0029] Figure 8 It is a top view of the utility model.

[0030] Figure 9 It is a perspective view of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will further illustrate the utility model through embodiments, but the scope of the utility model is not limited thereto.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] As Figure 3-9 shown, a curved web reinforced steel secondary beam for a steel cord factory building includes:

[0034] Upper flange plate;

[0035] Lower flange plate, having the same specification as the upper flange plate;

[0036] A curved web rolled by a numerical control rolling machine, the upper and lower ends of the curved web are respectively fixedly connected to the upper flange plate and the lower flange plate, and the length of the curved web in the horizontal direction is less than the lengths of the upper flange plate and the lower flange plate;

[0037] Reinforcing connecting plates, there are two, respectively fixedly connected to the two ends of the curved web, the upper and lower ends of the reinforcing connecting plates are respectively fixedly connected to the upper flange plate and the lower flange plate, and the ends of the two reinforcing connecting plates are respectively flush with the two ends of the upper flange plate.

[0038] The curved web rolled by a numerical control rolling machine has low cost. Since the curved web is connected to the upper and lower flange plates by a curved path, and the two ends of the curved web are welded with reinforcing connecting plates. On the one hand, it can strengthen the connection, and on the other hand, it can be used as an arc starting plate. During welding, first spot-weld the curved web, and then automatically weld. Without this reinforcing connecting plate, during automated welding, the end is prone to over / stack welding or insecure welding (lack of penetration). However, in this application, using the reinforcing connecting plate as the arc starting plate can solve this problem, and can make the best use of automated equipment for processing and manufacturing, reducing labor costs.

[0039] The curved surface is not convenient for connecting the secondary beam to the main beam, while the reinforcing connecting plate is convenient for connecting the secondary beam to the main beam

[0040] Among them, the fixing method between the curved web, the reinforcing connecting plate, the upper flange plate and the lower flange plate is welding fixation.

[0041] The bending radius R of the curved web is 1.2 - 1.5H, and the chord height is 1 / 11 - 1 / 9H, where H is the width of the upper flange plate.

[0042] The bending radius R of the curved web is 1.3H, and the chord height is 1 / 10H.

[0043] In the width direction of the upper flange plate, the reinforcement connecting plate evenly divides the upper flange plate.

[0044] The reinforcement connecting plate has mounting holes.

[0045] For the curved web reinforced steel secondary beam of this solution, the main processing equipment includes laser cutting machines, numerical control plate rolling machines, plasma automatic welding machines, and ultra-high pressure shot blasting machines, etc.

[0046] For the laser cutting machine, after the raw materials enter the site, by splitting the drawings, calculating the cutting dimensions, sorting and counting the data, and transmitting it to the laser cutting equipment.

[0047] For the numerical control plate rolling machine, after the cutting is completed, the steel beam web is bent according to the requirements of the drawings by using the numerical control plate rolling equipment.

[0048] For the plasma automatic welding machine, after the upper and lower flange plates of the steel beam and the curved web are assembled and erected, they are pre-fixed and formed by spot welding, and then the steel beam is placed by using special tooling fixtures, and full penetration welding is carried out by plasma automatic welding.

[0049] For the ultra-high pressure shot blasting machine, after the steel beam is welded and fabricated, the welding spatter and burrs are removed by grinding with an angle grinder, and then the steel beam is placed on the ultra-high pressure shot blasting machine track. Steel shots with a diameter of about 0.2 - 3.0 mm are shot out through multiple spray guns with a pressure of about 120 Kpa - 280 Kpa to carry out rust removal and surface roughening treatment on all angles of the steel beam for subsequent painting operations.

[0050] Specifically:

[0051] In the manufacturing preparation stage, based on the architectural structure design drawings, the component drawings are deepened, and the load parameter differences between the conventional steel beam and the curved web reinforced steel beam are calculated, so that the load of the curved web reinforced steel beam must meet the original standard or be higher than the original standard. Through the technical splitting of the deepened drawings, component processing drawings are generated, including manufacturing information such as component size specifications, materials, quantities, etc., so that the processing factory arranges the production plan based on this. The selection of raw materials refers to relevant standards such as GB / T700 - 2006 "Plain Carbon Structural Steel" and GB / T3274 - 2017 "Hot Rolled Steel Plates and Strips for Carbon Structural Steel and Low Alloy Structural Steel". The web thickness dimension is optimized among the steel beams of the same model and specification as the key point for saving materials. Through the analysis of the drawing model and statistical data processing, the material procurement plan for this batch is reported.

[0052] Enter the production stage and perform operations for each process using corresponding professional equipment. The cutting of flange plates and curved web plates is completed by a laser or flame CNC cutting machine. Specifically, input the numerical values of the components with the drawing dimensions into the equipment computer, and select the optimal nesting size for layout according to the material thickness classification and the plate width, which can not only improve the cutting efficiency but also avoid material waste to the greatest extent. After cutting, enter the assembly and welding equipment. According to the requirements of the drawings and technical specifications, ensure that the perpendicularity between the curved web plate and the flange plate is ≤0.5mm, and the evenly divided dimension of the flange width is ≤2mm. Then, use a special automatic submerged arc welding machine to program the welding path. The curved web plate is made by a CNC plate rolling machine. When programming, the radius size is selected as 1.3 times the width of the flange plate for smooth transition connection, and straight sections with a length of 150mm are left at both ends as connection plates for strengthening the curved web plate of the steel beam. During the automatic submerged arc welding process, observe the current welding situation in real time and ensure an adequate supply of welding wire to avoid the occurrence of welding defects such as porosity, slag inclusion, and cracks, as well as missed welding due to the exhaustion of the welding wire. If necessary, stop the machine for inspection and manually rectify the welding defects to meet the quality standard requirements. For parts with high requirements for steel beam welding or component welding that cannot be detected by visual inspection or measuring instruments, ultrasonic flaw detection should be arranged. In the case of a steel beam with abnormal welding, mark the abnormal problem phenomenon, position dimensions, and rectification suggestions at the location of the abnormality. If it involves key quality problems, a detailed rectification plan should be reported to the relevant process technology department for approval, and only after approval can the next process of processing and manufacturing be carried out. For the quality control of component dimensions and appearance, before the positioning welding of components on the steel beam is completed, check the position, direction, and dimensions, component specification dimensions, and associated assembly dimensions according to the drawings; the appearance should have no welding defects and no spatter or welding slag. Compared with the manufacturing of traditional steel secondary beams, this high-strength curved web plate reinforced steel secondary beam also adds reinforcement connection plates at both ends of the web plate. The thickness of the connection plate is 1.5 times the thickness of the curved web plate, which not only improves the connection strength of the steel beam but also makes it more conducive to installation, effectively improving the prominent problems in on-site assembly and enhancing work efficiency. Under the action of an ultra-high-pressure shot blasting machine, the track progression speed is set at approximately 6m / min, and steel shots with a diameter of approximately 0.2 - 3.0mm are ejected through multiple spray guns with a pressure of approximately 120Kpa - 280Kpa to blow and beat the steel beam from multiple angles and in all directions, thoroughly removing the floating rust on the surface of the steel beam and roughening the surface of the steel beam for painting operations. The painting quality of steel components determines the corrosion resistance of steel components in various environments. First, spray a qualified thickness of primer according to the technical requirements of the drawings, ensuring that the surface thickness is uniform and there is no self-leveling phenomenon. Let it stand for more than 4 hours under the condition of an ambient temperature of approximately 18℃. Then, according to the technical requirements of the drawings and the actual on-site use needs, spray 2 - 3 intermediate coats and top coats. After still standing for an appropriate time, perform pull-out and paint film thickness tests on the surface of the steel components. When all the above work is completed, the processing and manufacturing of this high-strength curved web plate reinforced steel beam are completed.

[0053] It should be noted that the above-described embodiments are only used to explain the present utility model and do not constitute any limitation to the present utility model. The present utility model has been described by referring to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words rather than limiting words. Modifications can be made to the present utility model within the scope of the claims of the present utility model as stipulated, and the present utility model can be revised without departing from the scope and spirit of the present utility model. Although the present utility model described therein relates to specific methods, materials and embodiments, it does not mean that the present utility model is limited to the specific examples disclosed therein. On the contrary, the present utility model can be extended to all other methods and applications with the same functions.

Claims

1. A curved web reinforced steel secondary beam for a steel cord plant, characterized in that: include: Upper flange plate; The lower flange plate has the same specifications as the upper flange plate; The curved web is rolled by a CNC plate rolling machine, the upper and lower ends of the curved web are respectively fixedly connected to the upper flange plate and the lower flange plate, and the horizontal length of the curved web is shorter than the length of the upper flange plate and the lower flange plate; There are two reinforcing connecting plates, which are fixedly connected to the two ends of the curved web respectively. The upper and lower ends of the reinforcing connecting plates are fixedly connected to the upper flange plate and the lower flange plate respectively. The ends of the two reinforcing connecting plates are flush with the two ends of the upper flange plate respectively.

2. The curved web reinforced steel secondary beam for a steel cord plant as claimed in claim 1, characterized in that: The curved web, the reinforcement connecting plate, the upper flange plate and the lower flange plate are fixed by welding.

3. The curved web reinforced steel secondary beam for a steel cord plant as claimed in claim 1, characterized in that: The bending radius of the curved web is R = 1.2-1.5H, the chord height = 1 / 11-1 / 9H, and H is the width of the upper flange plate.

4. The curved web reinforced steel secondary beam for a steel cord plant as claimed in claim 3, characterized in that: The bending radius of the curved web is R = 1.3H, and the chord height = 1 / 10H.

5. The curved web reinforced steel secondary beam for a steel cord plant as claimed in any one of claims 1 to 4, characterized in that: In the width direction of the upper flange plate, the reinforcement connecting plate equally divides the upper flange plate.

6. The curved web reinforced steel secondary beam for a steel cord plant as claimed in claim 5, characterized in that: The reinforcement connecting plate has a mounting hole.

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