Fabricated steel structure industrial factory building structure

Abstract

The invention discloses a fabricated steel structure industrial factory building structure, and relates to the technical field of concrete structure factory buildings. The assembly type steel structure industrial factory building structure comprises a plurality of layers of horizontal steel structure frames, all the layers of horizontal steel structure frames are connected through stand columns, the horizontal steel structure frames are rectangular frames formed by perpendicularly connecting the ends of a plurality of steel main beams, and a plurality of steel secondary beams are connected to the inner sides of the rectangular frames in parallel; the butt joint device is mainly constructed by adopting a steel structure, is different from direct welding of the existing steel structure, adopts a lap joint type design, and is matched with a related positioning structure for positioning during lap joint, so that the butt joint accuracy between the steel structures is ensured, and a stable supporting and alignment mode is omitted in the lap joint mode, so that workers only need to concentrate on welding work, and the welding efficiency is improved. The work load is relieved, the positioning structure is matched with the lap joint structure to assist in achieving the effect of improving the connection strength, all the parts can be installed in a prefabricated mode firstly, and rapid building can be achieved during construction.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete structure factories, and specifically to a prefabricated steel structure industrial factory building structure. Background Art

[0002] With the rapid development of urban economy, the land resources are becoming increasingly tense, and problems such as low utilization rate of industrial land are becoming increasingly prominent. It is necessary to increase the capacity and efficiency of industrial land and promote a new type of industrial land model. At the same time, to promote the green and high-quality development of urban and rural construction, building industrialization has become the main development trend in the construction field. The prefabricated industrial factory building structure form is an important technical support for increasing the capacity and efficiency of industrial land.

[0003] Traditional concrete structure factories usually require a large amount of on-site wet operations, with stable structures, but their construction progress is slow and the quality is not easy to control, and they cannot meet the large-span requirements of some industrial factories; while steel structure factories have a fast construction progress, but face problems such as high cost and significant thermal bridge effects. Therefore, there is an urgent need for a prefabricated industrial factory building structure with economic cost, convenient construction and short cycle. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a prefabricated steel structure industrial factory building structure, which solves the problems existing in traditional concrete structure factories.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A prefabricated steel structure industrial factory building structure includes a plurality of layers of horizontal steel structure frameworks, and each layer of horizontal steel structure frameworks is connected by columns. The horizontal steel structure framework is a rectangular framework formed by perpendicular connection of the ends of a plurality of steel main beams, and a plurality of steel secondary beams are connected in parallel inside the rectangular framework. A non-reinforced composite slab is laid on the top of each layer of rectangular framework, and the column is a concrete-filled steel tube column;

[0006] Between the concrete-filled steel tube column and the end of the steel main beam, there is a main connection node. The end of the steel main beam is welded to the main connection node. Before welding, the end of the steel main beam is first lapped on the main connection node, and the main connection node is provided with a positioning structure for positioning the steel main beam to keep it aligned;

[0007] On the side of the steel main beam, a secondary connection node for connecting the steel secondary beam is welded. Before welding, the steel secondary beam is first lapped on the secondary connection node, and the secondary connection node is provided with a positioning structure for positioning the steel main beam to keep it aligned.

[0008] Preferably, the main connection node includes:

[0009] A steel sleeve, fixedly sleeved on the end of the concrete-filled steel tube column to butt the upper and lower concrete-filled steel tube columns;

[0010] The main connecting seat is installed on the side of the steel sleeve to support the steel main beam;

[0011] The main connecting seat, steel main beam and steel secondary beam are all I-beams. The lower half of the end of the main connecting seat and the upper half of the end of the steel main beam are extended so that the steel main beam is overlapped on the main connecting seat through the extended part.

[0012] Preferably, the positioning structure includes two symmetrically arranged positioning steel plates forming an X-shaped structure, and the middle parts of the two positioning steel plates are welded by square steel blocks. The overlapping surfaces of the positioning structure presenting a steel main beam and an extended part of the main connecting seat are provided with square notches corresponding to the square steel blocks, and the upper and lower horizontal plates of the steel main beam and the main connecting seat are provided with positioning through grooves that are plugged into the ends of the positioning steel plates.

[0013] Preferably, a first inverted T-shaped extension strip is provided at the lower half of the other end of the main connecting seat, and the first inverted T-shaped extension strip is inserted through the interior of the steel sleeve, and slots matching the first inverted T-shaped extension strip are provided around the steel sleeve. The first inverted T-shaped extension strip of the main connecting seat is inserted into the steel sleeve and then welded to the steel sleeve. A bayonet is provided at the top of one end of the first inverted T-shaped extension strip, and the other ends of the four groups of main connecting seats are buckled by inserting a connecting ring into the bayonet.

[0014] Preferably, the main connection node also includes a main extension seat connected to the side of the steel sleeve, the main extension seat is composed of U-shaped steel and two rows of first sliding plates symmetrically welded on the inner side thereof, and the spacing between the two rows of first sliding plates matches the thickness of the middle vertical plate of the main connection seat, the two rows of first sliding plates are locked with the middle vertical plate of the main connection seat by through bolts, and the first sliding plates are provided with long bolt grooves that allow the bolts to slide within a limited range, and the main connection node is extended by sliding between the main extension seat and the main connection seat to adapt to the installation of the steel main beam with insufficient length;

[0015] A second inverted T-shaped extension bar having the same structure and function as the first inverted T-shaped extension bar is welded to the other side of the U-shaped steel.

[0016] Preferably, both ends of the steel secondary beam are consistent with the structure of the steel main beam, and the secondary connection node includes a first connection seat whose main structure is similar to the main connection seat, one side of the first connection seat supports the steel secondary beam, and the other side of the first connection seat is inserted into the side of the steel main beam and welded to the steel main beam. The first connection seat is positioned and connected to the steel secondary beam through a positioning structure and then welded, and a first positioning groove is opened on one side of the top of the first connection seat to correspond to the middle vertical plate of the steel secondary beam.

[0017] Preferably, the secondary connection node includes a secondary connection seat having a main structure similar to that of the main connection seat, and one side of the top of the second connection seat is bent upward to support the top plate of the steel secondary beam, and a second positioning groove is provided in the middle of the bent portion of the second connection seat to correspond to the middle vertical plate of the steel secondary beam.

[0018] Preferably, the secondary connection node further includes a secondary extension seat welded inside the steel main beam. The secondary extension seat includes an L-shaped steel plate. Two rows of second sliding plates are welded side by side in the middle of the inner side of the L-shaped steel plate, and the distance between the two rows of second sliding plates matches the thickness of the middle vertical plate of the secondary connection seat. The two rows of second sliding plates and the middle vertical plate of the secondary connection seat are locked by through bolts, and long bolt slots allowing the bolts to slide within a limited range are provided on the second sliding plates. By sliding between the secondary extension seat and the secondary connection seat, the secondary connection node is extended to adapt to the installation of a steel secondary beam with insufficient length. Convex teeth are provided on the top of the second sliding plates and the bottom of one side of the secondary connection seat, and tooth grooves adapted to the convex teeth are provided on the bottom surface of the inner side of the L-shaped steel plate between the two rows of second sliding plates and on the bottom surface of the top plate of the secondary connection seat.

[0019] Preferably, the concrete-filled steel tube column is composed of a square steel tube and a concrete column poured inside, and cutting grooves are cut on the side surfaces at both ends of the concrete column. After the end of the concrete column is inserted into the steel sleeve, concrete is poured and fixed into one body.

[0020] Preferably, the non-reinforced composite slab includes a precast concrete slab laid on the top of a rectangular frame and a cast-in-place concrete pavement laid on the top of the precast concrete slab.

[0021] The present invention provides a prefabricated steel structure industrial building structure. Compared with the prior art, it has the following beneficial effects:

[0022] 1. The industrial building built by the present invention is mainly constructed with a steel structure. Different from the existing direct welding of steel structures, it adopts a lap joint design and is positioned during lap joint with relevant positioning structures, ensuring the accuracy of the butt joint between steel structures. Moreover, the lap joint method eliminates the need for support stability and alignment methods, enabling workers to focus only on welding work, reducing the work burden. The positioning structure and lap joint structure can also assist in improving the connection strength. Additionally, each part can be prefabricated and installed first, and can be quickly constructed during construction, improving the construction efficiency.

[0023] 2. The main connection node adopts a plug-in combination installation of the main connection seat and the steel sleeve, supplemented by connection ring buckling, which is preliminarily fixed before welding and can also assist in fixing after welding to improve the stress strength; the connection methods of the main connection seat and the secondary connection node with the steel main beam and the steel secondary beam are the same, enabling most of the structures to be processed in the same way, also improving the processing efficiency; among them, on the lap joint surface, a square steel block with a square notch and a positioning structure is used for axial locking, and an X-shaped structure is used for guiding, and the four ends of the X-shaped structure are used for plug-in positioning and axial limiting. Even without welding, it has a certain axial tensile strength, and the construction is simple and has high strength.

[0024] 3. In the third embodiment, the main connection node and the secondary connection node of the second embodiment are improved by adopting a telescopic structure, enabling fine adjustment of the lengths of the main connection node and the secondary connection node. When there are errors in the processing of the steel main beam and the steel secondary beam resulting in insufficient lengths, or when the spacing between the steel main beam and the concrete-filled steel tube column is slightly larger, the installation nodes can be extended to adapt to the slightly shorter steel main beam and steel secondary beam, eliminating the errors and ensuring smooth installation. Moreover, both specifications of the main connection node and the secondary connection node can be installed on the steel sleeve as needed without modifying the steel sleeve itself, making the installation more flexible and convenient.

[0025] 4. For the concrete-filled steel tube column composed of precast concrete columns and square steel tubes, the concrete columns extending from both ends can be directly inserted into the steel sleeve for assembly, with simple and rapid installation. Through the cutting grooves cut on the side, after pouring concrete into the steel sleeve, the concrete flows into the cutting grooves and solidifies, making the upper and lower parts more firmly fixed and not easily separated by vibration, and the construction is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a schematic diagram of the connection between the steel main beam and the steel secondary beam of the present invention;

[0028] Figure 3 is a schematic diagram of the connection between the main connection seat and the connection ring of the present invention;

[0029] Figure 4 is a schematic diagram of the main connection seat of the second embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of the first connection seat, the main connection seat of the steel secondary beam and the positioning structure of the present invention;

[0031] Figure 6 is a schematic diagram of the main connection node of the third embodiment of the present invention;

[0032] Figure 7 is an exploded view of the main connection node of the third embodiment of the present invention;

[0033] Figure 8 is an exploded view of the secondary connection node of the third embodiment of the present invention;

[0034] Figure 9 is a schematic diagram of the convex teeth and tooth grooves of the secondary connection node of the third embodiment of the present invention;

[0035] Figure 10 is a schematic diagram of the connection between the steel sleeve and the concrete-filled steel tube column of the present invention;

[0036] Figure 11 of the present inventionFigure 10 Partial enlarged view at location A in the figure.

[0037] In the figure: 1. Steel main girder;

[0038] 2. Steel secondary girder;

[0039] 3. Non-reinforced composite slab; 31. Prefabricated concrete slab; 32. Cast-in-place concrete pavement;

[0040] 4. Concrete-filled steel tube column; 41. Square steel tube; 42. Concrete column; 43. Cutting groove;

[0041] 5. Main connection node; 51. Steel sleeve; 52. Main connection seat; 53. Square notch; 54. Positioning through groove; 55. First inverted T-shaped extension bar; 56. Slot; 57. Bayonet; 58. Connection ring; 59. Main extension seat; 591. U-shaped steel; 592. First sliding plate; 510. Second inverted T-shaped extension bar;

[0042] 6. Positioning structure; 61. Positioning steel plate; 62. Square steel block;

[0043] 7. Secondary connection node; 71. First connection seat; 72. First positioning groove; 73. Second connection seat; 74. Second positioning groove; 75. Secondary extension seat; 751. L-shaped steel plate; 752. Second sliding plate; 753. Convex teeth; 754. Tooth groove. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] The present invention provides four technical solutions:

[0046] Figure 1 The first embodiment is shown: An assembled steel structure industrial building structure includes several layers of horizontal steel structure frames, and each layer of horizontal steel structure frames is connected by columns. The horizontal steel structure frame is a rectangular frame formed by perpendicular connection of the ends of several steel main girders 1, and several steel secondary girders 2 are connected in parallel inside the rectangular frame. A non-reinforced composite slab is laid on the top of each layer of rectangular frame. The non-reinforced composite slab 3 includes a precast concrete slab 31 laid on the top of the rectangular frame and a cast-in-place concrete pavement 32 laid on the top of the precast concrete slab 31. The column is a concrete-filled steel tube column 4;

[0047] Between the concrete-filled steel tube column 4 and the end of the steel main beam 1, there is a main connection node 5. The end of the steel main beam 1 and the main connection node 5 are welded. Before welding, the end of the steel main beam 1 is first lapped on the main connection node 5 during butt joint, and there is a positioning structure 6 on the main connection node 5 for positioning the steel main beam 1 to keep it aligned.

[0048] On the side of the steel main beam 1, there is a secondary connection node 7 for connecting the steel secondary beam 2. Before welding, the steel secondary beam 2 is first lapped on the secondary connection node 7 during butt joint, and there is a positioning structure 6 on the secondary connection node 7 for positioning the steel main beam 1 to keep it aligned.

[0049] The industrial building erected by the present invention is mainly made of steel structure. Different from the existing direct welding of steel structures, it adopts a lap joint design and is equipped with a relevant positioning structure 6 for positioning during lap joint, ensuring the accuracy of butt joint between steel structures. Moreover, the lap joint method eliminates the need for support stability and alignment methods, enabling workers to focus only on welding work, reducing the work burden. The positioning structure 6 and the lap joint structure can also assist in achieving the effect of improving the connection strength. And each part can be prefabricated and installed first, which can be quickly erected during construction, improving the construction efficiency.

[0050] Figure 2 and Figure 4 The second embodiment is shown. The main difference from the first embodiment is that the main connection node 5 includes:

[0051] A steel sleeve 51, fixedly sleeved on the end of the concrete-filled steel tube column 4 to butt joint the upper and lower concrete-filled steel tube columns 4;

[0052] A main connection seat 52, installed on the side of the steel sleeve 51 for supporting the steel main beam 1;

[0053] The main connection seat 52, the steel main beam 1 and the steel secondary beam 2 are all I-beams. The lower half of the end of the main connection seat 52 and the upper half of the end of the steel main beam 1 are extended, so that the steel main beam 1 is lapped on the main connection seat 52 through the extended part.

[0054] The positioning structure 6 includes two symmetrically arranged positioning steel plates 61 forming an X-shaped structure. Between the middles of the two positioning steel plates 61, they are welded by a square steel block 62. Square notches 53 corresponding to the square steel block 62 are opened on the lap joint surfaces of the steel main beam 1 and the extended part of the main connection seat 52. Positioning through slots 54 for inserting the ends of the positioning steel plates 61 are opened in the upper and lower horizontal plates of the steel main beam 1 and the main connection seat 52.

[0055] At the lower half of the other end of the main connection seat 52, there is a first inverted T-shaped extension bar 55. The first inverted T-shaped extension bar 55 is inserted through the inside of the steel sleeve 51. Slots 56 adapted to the first inverted T-shaped extension bar 55 are provided around the steel sleeve 51. After the first inverted T-shaped extension bar 55 of the main connection seat 52 is inserted into the steel sleeve 51, it is welded to the steel sleeve 51. A bayonet 57 is provided at the top of one end of the first inverted T-shaped extension bar 55. The other ends of the four groups of main connection seats 52 are buckled through a connection ring 58 being snapped into the bayonet 57.

[0056] The two ends of the steel secondary beam 2 have the same structure as the steel main beam 1. The secondary connection node 7 includes a first connection seat 71 whose main structure is similar to that of the main connection seat 52. One side of the first connection seat 71 supports the steel secondary beam 2, and the other side of the first connection seat 71 is inserted into the inside of the side of the steel main beam 1 and welded to the steel main beam 1. After the first connection seat 71 is positioned and docked with the steel secondary beam 2 through the positioning structure 6, it is welded. A first positioning groove 72 corresponding to the middle vertical plate of the steel secondary beam 2 is provided on one side of the top of the first connection seat 71.

[0057] The main connection node 5 is installed by inserting and combining the main connection seat 52 and the steel sleeve 51, and then supplemented by buckling with the connection ring 58, which is preliminarily fixed before welding and can also assist in fixing after welding to improve the stress intensity; the connection methods of the main connection seat 52 and the secondary connection node 7 with the steel main beam 1 and the steel secondary beam 2 are the same, so that most of the structures can be processed in the same way, which also improves the processing efficiency; among them, at the overlapping surface, a square notch 53 is provided to cooperate with the square steel block 62 of the positioning structure 6 for axial locking, and the X-shaped structure is used for guiding, and the four ends of the X-shaped structure are used for plugging positioning and axial limiting. Even without welding, it has a certain axial tensile strength, and the erection is simple and has high strength.

[0058] Figure 2 and Figures 5 - 9 The third implementation manner is shown. The main difference from the second implementation manner is that the main connection node 5 further includes a main extension seat 59 connected to the side of the steel sleeve 51. The main extension seat 59 is composed of a U-shaped steel 591 and two columns of first sliding plates 592 symmetrically welded on the inner side thereof. The distance between the two columns of first sliding plates 592 matches the thickness of the middle vertical plate of the main connection seat 52. The two columns of first sliding plates 592 and the middle vertical plate of the main connection seat 52 are locked by through bolts, and long bolt slots allowing the bolts to slide within a limited range are provided on the first sliding plates 592. By sliding between the main extension seat 59 and the main connection seat 52, the main connection node 5 is extended to adapt to the installation of the steel main beam 1 with insufficient length;

[0059] On the other side of the U-shaped steel 591, a second inverted T-shaped extension bar 510 with the same structure and function as the first inverted T-shaped extension bar 55 is welded. This design adjusts the first inverted T-shaped extension bar 55 of the main connection seat 52 in the second embodiment to the U-shaped steel 591, so that the steel sleeve 51 itself does not need to be modified.

[0060] The secondary connection node 7 includes a second connection seat 73 whose main structure is similar to that of the main connection seat 52. One side of the top of the second connection seat 73 is bent upward to support the top plate of the secondary steel beam 2, and a second positioning groove 74 corresponding to the middle vertical plate of the secondary steel beam 2 is provided in the middle of the bent part of the second connection seat 73.

[0061] The secondary connection node 7 further includes a secondary extension seat 75 welded inside the main steel beam 1. The secondary extension seat 75 includes an L-shaped steel plate 751. Two rows of second sliding plates 752 are welded side by side in the middle of the inner side of the L-shaped steel plate 751. The distance between the two rows of second sliding plates 752 matches the thickness of the middle vertical plate of the second connection seat 73. The two rows of second sliding plates 752 and the middle vertical plate of the second connection seat 73 are locked by through bolts, and long bolt slots allowing the bolts to slide within a limited range are provided on the second sliding plates 752. By sliding between the secondary extension seat 75 and the second connection seat 73, the length of the secondary connection node 7 is extended to adapt to the installation of the secondary steel beam 2 with insufficient length. Convex teeth 753 are provided on the top of the second sliding plate 752 and the bottom of one side of the second connection seat 73. Tooth grooves 754 adapted to the convex teeth 753 are provided on the bottom surface of the inner side of the L-shaped steel plate 751 between the two rows of second sliding plates 752 and on the bottom surface of the top plate of the second connection seat 73. The convex teeth and the tooth grooves 754 can adopt similar structures such as trapezoidal, triangular, wave-shaped, etc. The size of the teeth is specifically set according to requirements; the cooperation of the convex teeth and the tooth grooves 754 enables the second connection seat 73 to further strengthen the tensile strength by using the clamping force when moving horizontally and extending relative to the secondary extension seat 75. When adjusting, the second connection seat 73 needs to be lifted a little first to separate the teeth and then pulled apart. Therefore, a space for the upward movement of the second connection seat 73 is reserved between the second sliding plate 752 and the top plate of the main steel beam 1.

[0062] In this embodiment, the main connection node 5 and the secondary connection node 7 in the second embodiment are improved by adopting a telescopic structure, so that the lengths of the main connection node 5 and the secondary connection node 7 can be finely adjusted. When there are errors in the processing of the main steel beam 1 and the secondary steel beam 2 resulting in insufficient length, or when the distance between the main steel beam 1 and the concrete-filled steel tubular column 4 is slightly larger during erection, the slightly shorter main steel beam 1 and secondary steel beam 2 can be adapted by extending the installation node, eliminating the error and ensuring smooth installation. Moreover, both specifications of the main connection node 5 and the secondary connection node 7 can be installed on the steel sleeve 51 as required, and the steel sleeve 51 itself does not need to be modified. Therefore, the installation is more flexible and convenient.

[0063] Figures 10 - 11The fourth embodiment is shown. The main difference from the first embodiment is that the concrete-filled steel tube column 4 is composed of a square steel tube 41 and a concrete column 42 poured inside it. Cutting grooves 43 are cut on the sides at both ends of the concrete column 42. After the end of the concrete column 42 is inserted into the steel sleeve 51, concrete is poured to fix them into one body.

[0064] The concrete-filled steel tube column 4 formed by the precast concrete column 42 and the square steel tube 41. The concrete columns 42 protruding from both ends can be directly inserted into the steel sleeve 51 for assembly, and the installation is simple and fast. Through the cutting grooves 43 cut on the sides, after pouring concrete in the steel sleeve 51, the concrete flows into the cutting grooves 43 and solidifies, and the upper and lower parts are fixed more firmly and are not easily separated by vibration, and the construction is simple and fast.

[0065] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0066] When building the factory building, first set up the concrete-filled steel tube columns 4 on the foundation according to the drawing dimensions. Then, put the steel sleeve 51 on the top of the concrete-filled steel tube column 4. Then, insert the first inverted T-shaped extension bar 55 of the main connection seat 52 into the steel sleeve 51, and put the connection ring 58 on the bayonet 57 of the first inverted T-shaped extension bar 55 for preliminary locking. Then, insert the positioning structure 6 on the main connection seat 52, insert the bottom end of the positioning steel plate 61 into the positioning through groove 54 of the main connection seat 52, and make the square steel block 62 snap into the square notch 53. Then, place the steel main beam 1 between the main connection seats 52 on two adjacent concrete-filled steel tube columns 4. Similarly, make the positioning through groove 54 and the square notch 53 of the steel main beam 1 cover the upper half of the positioning structure 6;

[0067] If the length of the steel main beam 1 is insufficient, the original main connection seat 52 can be removed and replaced with a main connection seat 52 without the first inverted T-shaped extension bar 55. First, operate in the same way and insert and install the main extension seat 59. Then, insert the main connection seat 52 into the main extension seat 59, insert the bolt, and then install the positioning structure 6 and the steel main beam 1 on the main connection seat 52 in sequence, and then lock the nut of the bolt. Finally, weld the concrete-filled steel tube column 4, the main connection node 5, and the steel main beam 1 well;

[0068] After the steel main beam 1 is built, build the steel secondary beam 2. First, insert the first connection seat 71 into the side of the steel main beam 1, install the steel secondary beam 2 in the same way as the steel main beam 1 for lapping, and finally weld the steel main beam 1, the first connection seat 71, and the steel secondary beam 2 all together;

[0069] If the length of the secondary steel beam 2 is insufficient, replace the first connecting seat 71 with the secondary extension seat 75 and insert it into the side of the primary steel beam 1. Then insert the second connecting seat 73 into the secondary extension seat 75, penetrate it with bolts, install the positioning structure 6, place the secondary steel beam 2 on it, adjust the lengths of the secondary extension seat 75 and the second connecting seat 73, and then lock the nuts and weld all of them to complete the construction of the steel structure framework for one floor.

[0070] When constructing the second floor, inject ordinary concrete into the steel sleeve 51, then insert the second concrete-filled steel tube column 4, and repeat the previous steps after waiting for it to solidify to complete the construction of the steel structure framework.

[0071] Finally, lay precast concrete slabs 31 on the steel structure framework, then spread cast-in-place concrete pavement 32 on it, and after solidification, the construction of the factory building is completed.

[0072] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0073] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled steel structure industrial building structure, comprising a plurality of layers of horizontal steel structure frameworks, and the horizontal steel structure frameworks of each layer are connected by columns, characterized in that: The horizontal steel structure frame is a rectangular frame formed by perpendicular connection of the ends of several steel main beams, and several steel secondary beams are connected in parallel on the inner side of the rectangular frame. A non-reinforced composite slab is laid on the top of each layer of the rectangular frame, and the columns are concrete-filled steel tubes; Between the concrete-filled steel tube column and the end of the steel main beam, there is a main connection node. The end of the steel main beam is welded to the main connection node. Before welding, the end of the steel main beam is first lapped on the main connection node, and a positioning structure for positioning the steel main beam to maintain alignment is provided on the main connection node; On the side of the steel main beam, a secondary connection node for connecting the steel secondary beam is welded. Before welding, the steel secondary beam is first lapped on the secondary connection node, and a positioning structure for positioning the steel main beam to maintain alignment is provided on the secondary connection node.

2. The prefabricated steel structure industrial factory building structure according to claim 1, characterized in that: The main connection node includes: A steel sleeve, fixedly sleeved on the end of the concrete-filled steel tube column to butt the upper and lower concrete-filled steel tube columns; A main connection seat, installed on the side of the steel sleeve for supporting the steel main beam; The main connection seat, the steel main beam and the steel secondary beam are all I-beams. The lower half of the end of the main connection seat and the upper half of the end of the steel main beam are extended, so that the steel main beam is lapped on the main connection seat through the extended part.

3. The prefabricated steel structure industrial building structure according to claim 1, characterized in that: The positioning structure consists of two symmetrically arranged positioning steel plates to form an X-shaped structure. Between the middles of the two positioning steel plates, they are welded by a square steel block. Square notches corresponding to the square steel block are opened on the lapping surfaces of the steel main beam and the extended part of the main connection seat. Positioning through slots for inserting the ends of the positioning steel plates are opened in the upper and lower horizontal plates of the steel main beam and the main connection seat.

4. The prefabricated steel structure industrial building structure according to claim 2, wherein: On the lower half of the other end of the main connection seat, a first inverted T-shaped extension bar is provided. The first inverted T-shaped extension bar penetrates and inserts into the interior of the steel sleeve, and slots adapted to the first inverted T-shaped extension bar are opened around the steel sleeve. After the first inverted T-shaped extension bar of the main connection seat is inserted into the steel sleeve, it is welded to the steel sleeve. A bayonet is opened at the top of one end of the first inverted T-shaped extension bar. The other ends of the four groups of main connection seats are buckled by a connection ring clamped in the bayonet.

5. The prefabricated steel structure industrial building structure according to claim 2, wherein: The main connection node further includes a main extension seat connected to the side of the steel sleeve. The main extension seat is composed of a U-shaped steel and two columns of first sliding plates symmetrically welded on the inner side thereof. The distance between the two columns of first sliding plates matches the thickness of the middle vertical plate of the main connection seat. The two columns of first sliding plates and the middle vertical plate of the main connection seat are locked by through bolts, and long bolt slots allowing the bolts to slide within a limited range are opened on the first sliding plates. By sliding between the main extension seat and the main connection seat, the main connection node is extended to adapt to the installation of a steel main beam with insufficient length; On the other side of the U-shaped steel, a second inverted T-shaped extension bar with the same structure and function as the first inverted T-shaped extension bar is welded.

6. The prefabricated steel structure industrial plant structure according to claim 2, characterized in that: Both ends of the steel secondary beam have the same structure as the steel main beam. The secondary connection node includes a first connection seat whose main structure is similar to that of the main connection seat. One side of the first connection seat supports the steel secondary beam, and the other side of the first connection seat is inserted into the inside of the side of the steel main beam and welded to the steel main beam. The first connection seat is welded after being positioned and butted with the steel secondary beam through a positioning structure. A first positioning groove corresponding to the vertical middle plate of the steel secondary beam is provided on one side of the top of the first connection seat.

7. The prefabricated steel structure industrial plant structure according to claim 2, characterized in that: The secondary connection node includes a second connection seat whose main structure is similar to that of the main connection seat. One side of the top of the second connection seat is bent upward to support the top plate of the steel secondary beam, and a second positioning groove corresponding to the vertical middle plate of the steel secondary beam is provided in the middle of the bent part of the second connection seat.

8. The prefabricated steel structure industrial building structure according to claim 7, characterized in that: The secondary connection node further includes a secondary extension seat welded inside the steel main beam. The secondary extension seat includes an L-shaped steel plate. Two rows of second sliding plates are welded side by side in the middle of the inner side of the L-shaped steel plate, and the distance between the two rows of second sliding plates matches the thickness of the vertical middle plate of the second connection seat. The two rows of second sliding plates and the vertical middle plate of the second connection seat are locked by through bolts, and long bolt grooves allowing the bolts to slide within a limited range are provided on the second sliding plates. The sliding between the secondary extension seat and the second connection seat is used to extend the secondary connection node so as to adapt to the installation of a steel secondary beam with insufficient length. Convex teeth are provided on the top of the second sliding plate and the bottom of one side of the second connection seat, and tooth grooves adapted to the convex teeth are provided on the bottom surface of the inner side of the L-shaped steel plate between the two rows of second sliding plates and the bottom surface of the top plate of the second connection seat.

9. The prefabricated steel structure industrial building structure according to claim 1, characterized in that: The concrete-filled steel tube column is composed of a square steel tube and a concrete column poured inside it, and cutting grooves are cut on the side surfaces at both ends of the concrete column. After the end of the concrete column is inserted into the steel sleeve, concrete is poured to fix them into one body.

10. The prefabricated steel structure industrial plant structure according to claim 1, characterized in that: The non-reinforced composite slab includes a precast concrete slab laid on the top of a rectangular frame and a cast-in-place concrete pavement laid on the top of the precast concrete slab.

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