Prefabricated steel structure parts and production method

Abstract

The present invention provides an assembled steel structure prefabricated part and a production method, which belongs to the technical field of parking lot steel structure installation. The prefabricated parts include: inter-column support prefabricated parts, horizontal support prefabricated parts, and transition support prefabricated parts. Among them, there are several inter-column support prefabricated parts, and a single inter-column support prefabricated part is provided with a curved section and a straight section assembled end to end; the horizontal support prefabricated part is mounted on the inter-column support prefabricated part, and a single horizontal support prefabricated part is composed of several curved prefabricated monomers assembled end to end, and several curved prefabricated monomers form an arc surface; the transition support prefabricated part is arranged between the inter-column support prefabricated part and the horizontal support prefabricated part. The production method includes: pretreatment of steel, bending treatment, heating and stamping treatment, cutting treatment, punching, degreasing and rust removal treatment, and rust prevention treatment. Through the present invention, there is no need to perform overall welding on the steel structure prefabricated parts with curvature, which effectively avoids technical defects caused by welding.

Description

Technical Field

[0001] The present invention belongs to the technical field of parking lot steel structure installation, and more specifically, relates to an assembled steel structure prefabricated component. The present invention also relates to a production method of the prefabricated component. Background Art

[0002] The field of parking lot steel structure installation technology aims to use high-strength steel to build stable and durable parking facilities. This technology covers multiple links such as foundation construction, steel frame construction, covering material installation and reinforcement structure, ensuring that the parking shed or multi-story parking lot can withstand external wind and vehicle weight, while having good weather resistance and corrosion resistance. Through sophisticated construction standards and scientific installation methods, parking lot steel structure installation technology provides an efficient and economical solution to modern urban parking problems. Among them, parking sheds are mainly used in the construction of small and medium-sized outdoor parking lots.

[0003] In the construction of small and medium-sized outdoor parking lots, the parking shed mainly uses curved steel structure prefabricated parts as the supporting body and keel, and uses expansion screws to directly fix the curved steel structure prefabricated parts on the cement ground, and then fixes and installs plates such as sun panels, sunshades, endurance panels, polycarbonate panels, color steel panels, etc. on the top of the curved steel structure prefabricated parts to form the main structure of the parking shed. However, the curved steel structure prefabricated parts used for the supporting body of the parking shed in the existing structure adopt an integral welding process, that is, multiple steel structures are integrally welded in the processing plant, and finally formed into a steel structure prefabricated part with a curved structure. Because it has a certain curvature and a relatively large volume, it causes certain difficulties in the transportation process and requires large vehicles for loading. In addition, because the steel structure has a certain curvature, a hoisting mechanism is required for coordinated installation during the installation process. During the installation process, due to the existence of the curvature, the center of gravity of the prefabricated parts is not in the vertical direction. Therefore, during the installation process, the prefabricated parts are easily offset, resulting in bending and deformation of the fixing parts used to fix the bottom of the prefabricated parts, thereby reducing the reliability and stability of the fixed installation.

[0004] In addition, during the welding of steel structure prefabricated parts with a certain curvature, due to improper selection of welding parameters or incorrect operation methods, grooves or depressions are generated in the parent material along the weld toe. This defect will weaken the strength of the weld joint and may cause stress concentration. At the same time, during the welding process, the molten metal easily flows to the unmelted parent material outside the weld to form a metal nodule (weld nodule). Weld nodule not only affects the appearance of the weld, but may also affect the dimensional accuracy and assembly performance of the structure. Summary of the invention

[0005] The main purpose of the present application is to provide an assembled steel structure prefabricated part, which can be assembled in sections for the curved steel structure prefabricated parts in the parking lot. On the one hand, it can reduce the difficulty of transportation, and on the other hand, it can quickly install the steel structure prefabricated parts, effectively avoiding the displacement of the steel structure prefabricated parts or the deformation of the fixing parts during the installation process.

[0006] Another object of the present application is to provide a method for producing the above-mentioned prefabricated steel structure parts, which does not require integral welding of the curved steel structure prefabricated parts, thereby effectively avoiding technical defects caused by welding.

[0007] In order to achieve the above-mentioned purpose, the present application proposes an assembled steel structure prefabricated component, comprising:

[0008] The inter-column support prefabricated parts have several gaps arranged on the ground, and a single inter-column support prefabricated part is provided with a curved section and a straight section, the curved section and the straight section are assembled and spliced ​​end to end, and the end of the straight section is fixed to the ground;

[0009] A horizontal support prefabricated member is mounted on the inter-column support prefabricated member and corresponds to the inter-column support prefabricated member. A single horizontal support prefabricated member is formed by a plurality of curved prefabricated monomers assembled end to end. The plurality of curved prefabricated monomers form an arc surface. The position of the arc surface away from one end of the straight segment is higher than the height close to one end of the straight segment.

[0010] The transition support prefabricated component is arranged between the inter-column support prefabricated component and the horizontal support prefabricated component, and is fixedly connected to the inter-column support prefabricated component and the horizontal support prefabricated component respectively.

[0011] Furthermore, the curved section, straight section, and curved prefabricated unit all include: a plurality of hollow support members, each of which is provided with a connecting member, any one of which is inserted into the cavity of another support member and fixedly connected to each other, and the support members and the connecting members are spliced ​​end to end in sequence to form an assembled connection structure.

[0012] In this solution, the hollow support not only reduces the overall weight of the prefabricated parts, reduces the burden of transportation and installation, but also ensures sufficient structural strength and rigidity through reasonable structural design, meeting the load-bearing requirements of steel structure prefabricated parts in places such as parking lots. At the same time, this connection method is tight and stable, effectively preventing loosening and dislocation between prefabricated parts, and ensuring the stability and safety of the overall structure.

[0013] Furthermore, a plurality of convex ribs arranged at intervals are provided on the inner wall of the support member along the direction in which the connecting member extends, and a groove is provided on one end of the connecting member facing the convex rib. The groove is placed on the convex rib and corresponds one to one. The groove can slide relative to the convex rib. A locking position is provided on the support member. When the connecting member reaches the locking position, the support member and the connecting member are fixed to each other.

[0014] In this solution, the convex rib serves as a guide structure to guide the connector to be smoothly inserted into the cavity of the support member, and plays a positioning role during the installation process to ensure that the connector can be accurately aligned and inserted. This not only simplifies the installation steps, but also improves the installation accuracy and reduces the problems caused by misaligned installation. In addition, the close combination of the convex rib and the groove increases the contact area between the prefabricated parts and improves the rigidity and toughness of the connection part. The locking position set on the support member allows the connector to be locked when it reaches the predetermined position, ensuring a stable connection between the connector and the support member.

[0015] Furthermore, it also includes a locking assembly, which includes a locking piece and a fastening bolt. The connecting piece is provided with a first mounting hole, and the supporting piece is provided with a second mounting hole. When the connecting piece is inserted into the supporting piece, the first mounting hole and the second mounting hole reach a locking position when their positions correspond. The locking piece is inserted into the first mounting hole and the second mounting hole, and they are fastened by the fastening bolt.

[0016] In this solution, the introduction of the locking assembly makes the connection between the connector and the support more secure and reliable, effectively preventing safety accidents caused by loose or falling connections. Especially in places such as parking sheds that need to bear vehicle loads, this design can significantly improve the safety of the structure and protect the safety of personnel and vehicles. The installation process of the locking assembly requires that the first mounting hole and the second mounting hole must be precisely aligned in order to successfully insert the locking assembly.

[0017] Further, one end of the connecting member adjacent to the groove is recessed inward to form an accommodating cavity, an elastic member is fixedly installed in the accommodating cavity, an end of the elastic member facing away from the accommodating cavity is fixedly connected to a mounting seat, a slide rail is provided on the inner wall of the accommodating cavity, and the mounting seat is placed on the slide rail and can slide relatively;

[0018] The mounting seat is provided with an opening on one side facing the inner wall of the support member, a rolling body is clamped at the opening, and the rolling body and the opening can rotate relative to each other;

[0019] The support member is provided with a through groove. When the connecting member reaches the locking position, the rolling body is placed in the through groove and can be ejected to the outside of the support member.

[0020] In this solution, another locking method is provided, that is, when the locking end of the connecting member is placed in the inner cavity of the supporting member, the rolling body is compressed and rolled along the inner wall of the supporting member; when the rolling body falls into the through groove, the mounting seat slides along the direction of the slide rail under the action of the elastic member, and finally the rolling body is ejected to the outside of the supporting member, and the rolling body is limited by the through groove.

[0021] Furthermore, an annular groove is provided on one side of the rolling body close to the support member. When the connecting member reaches the locking position, the annular groove is ejected to the outside of the support member. At this time, a retaining ring is inserted into the annular groove, and the area of ​​the retaining ring is larger than the area of ​​the through groove.

[0022] In this solution, when the connector reaches the locking position and the annular groove is ejected to the outside of the support, the retaining spring is inserted into the annular groove. Since the area of ​​the retaining spring is larger than the area of ​​the through groove, this design effectively prevents the rolling element from accidentally retreating or loosening when subjected to external force. The presence of the retaining spring forms an additional locking mechanism, which significantly enhances the stability and safety of the connection.

[0023] Furthermore, the transition support prefabricated component comprises: a prefabricated plate with threaded holes, a side of the prefabricated plate connected to the horizontal support prefabricated component is provided with a flexible contact surface, the horizontal support prefabricated component is provided with a locking nut assembly, and the prefabricated plate and the locking nut assembly are fixed to each other by bolts.

[0024] In this solution, the threaded holes on the prefabricated plate are combined with the anti-loosening nut assembly on the horizontal support prefabricated part to ensure the tightness and stability of the connection. The anti-loosening nut assembly effectively prevents the bolts from loosening due to vibration and improves the reliability of the overall structure.

[0025] Furthermore, a DC motor is mounted on the prefabricated board, the output shaft of the DC motor is fixedly connected to the bolt, one end of the DC motor is connected to the normally closed contact of the relay, the other end of the DC motor is connected to an external power supply, and a switch is connected in series between the coil circuit of the relay and the power supply, the positive pole of the switch is fixed to the end of the prefabricated board facing the bolt, and the negative pole of the switch is fixed to the end of the bolt facing the prefabricated board;

[0026] When the bolts loosen and separate from the prefabricated board, the switch is disconnected, the relay coil is not energized, and the normally closed contacts of the relay remain closed. Then the motor forms a complete circuit loop, and the DC motor starts working, driving the bolts to rotate closer to the prefabricated board;

[0027] When the bolt approaches the prefabricated plate until the switch is closed, the relay coil is energized, the normally closed contact of the relay is disconnected, the circuit loop of the DC motor is cut off, the DC motor stops working, and the bolt is tightened.

[0028] In this solution, a complete automatic bolt tightening and anti-loosening function is formed by using a DC motor, relay, switch, power supply and other circuit systems. When the bolt loosens due to vibration or other reasons, the switch automatically disconnects, triggering the DC motor to drive the bolt to rotate and re-close to the prefabricated board. This process does not require manual intervention, improves the timeliness and efficiency of maintenance, and reduces safety hazards caused by loose bolts.

[0029] Furthermore, it also includes: a hollow three-way prefabricated component, which is plug-in fixedly connected to the straight section of the inter-column support prefabricated component, and the three-way prefabricated component extends to the tail of the curved prefabricated unit arranged opposite to the straight section, and the three-way prefabricated component is provided with a bell mouth at one end facing the tail, and rainwater collecting gutters are overlapped between adjacent bell mouths, so that rainwater can smoothly enter the bell mouth along the rainwater collecting gutters until it reaches the cavity of the inter-column support prefabricated component.

[0030] In this scheme, the design of the three-way prefabricated component not only achieves a stable structural connection, but also cleverly integrates the drainage function. By setting a bell mouth at one end and overlapping the rainwater collection trough between the adjacent bell mouths, an efficient rainwater collection and discharge system is formed. Rainwater can flow smoothly along the rainwater collection trough into the bell mouth and then into the cavity of the inter-column support prefabricated component. This rainwater can be used for irrigation, flushing toilets and other purposes in subsequent treatment, realizing the rational use of rainwater resources, conforming to the concept of green building and sustainable development, and promoting the use of rainwater resources.

[0031] The present application further proposes a method for producing an assembled steel structure prefabricated part, comprising the following steps:

[0032] Steel pretreatment:

[0033] Select at least two sizes of steel as raw materials for the supporting members and connectors of the inter-column supporting prefabricated members and the horizontal supporting prefabricated members. The two sizes of steel are hollow steels, one large and one small. The small-sized steel can be inserted into the large-sized steel to obtain spare materials.

[0034] Bending Process:

[0035] Use a bending machine to bend no more than 1 / 3 of the spare material to form a bent arc piece;

[0036] Heating and stamping treatment:

[0037] After heating the remaining spare materials and the curved parts, a punching machine is used to punch and form a number of convex ribs or grooves along the length direction;

[0038] Cutting process:

[0039] The stamped profiles are cut by a cutting machine, and the cut surfaces are grinded by a grinder after cutting to remove burrs and obtain cut parts;

[0040] Punching, degreasing and rust removal:

[0041] Punch holes on the cut parts separately to facilitate the subsequent installation of bolts and locking accessories;

[0042] Use a high-pressure water gun to rinse the cut parts after punching, and use an alkaline cleaning agent to remove oil and rust to obtain a clean prefabricated part;

[0043] Anti-rust treatment:

[0044] The inner cavity and outer surface of the clean prefabricated part are sprayed with anti-rust coating by using plasma spraying equipment to form an anti-rust layer on the inner cavity and outer surface of the prefabricated part.

[0045] The present application also proposes a production method for the above-mentioned prefabricated steel structure, comprising:

[0046] The prefabricated steel structure provided by the present invention has the following beneficial effects:

[0047] Through the present invention, the steel structure prefabricated parts are designed as assembled modules, especially the curved sections and straight sections of the inter-column support prefabricated parts are flexibly combined to form a complete supporting edge with an arc. When it needs to be transported, it can be disassembled into various modules; when it needs to be installed, it can be effectively combined. The horizontal support prefabricated parts are arc-shaped surfaces spliced ​​by multiple curved prefabricated monomers. This modular design greatly reduces the difficulty of transportation. Each prefabricated part is of moderate size, which is convenient for loading and unloading of transport vehicles, effectively saving logistics costs and time. In addition, the assembled structure allows the prefabricated parts to be quickly assembled on site without the need for complex on-site processing, greatly shortening the construction period. The assembled connection method between the inter-column support prefabricated parts and the ground, the horizontal support prefabricated parts and the transition support prefabricated parts makes the installation process simpler and faster, and improves construction efficiency. Through precise prefabrication and assembly, the present invention avoids the dimensional deviation that may be caused by on-site production of traditional steel structures and ensures precision control during the installation process. In particular, the curved surface design of the horizontal support prefabricated parts, with its height difference setting, helps to better adapt to complex terrain such as parking lots, and enhances the stability of the overall structure. The height difference also provides a slope on which solar panels, sunshades and other panels are fixedly installed, and also provides the necessary channels for rainwater to fall smoothly along the slope during the rainy season. At the same time, this segmented splicing installation method, after the prefabricated parts on the ground are fixed and installed stably, the remaining prefabricated parts are spliced ​​and assembled in sequence, reducing the risk of displacement of steel structure prefabricated parts or deformation of fixed parts during installation, and improving the quality of the project.

[0048] The prefabricated steel structure provided by the present invention has the following beneficial effects:

[0049] Through refined steel processing (steel pretreatment - bending - heating and stamping - cutting - punching, degreasing and rust removal - rust prevention), material waste is reduced and subsequent processing procedures are simplified; overall welding is avoided, welding technology defects are effectively prevented, and the overall quality and stability of prefabricated parts are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the overall effect of the assembled steel structure prefabricated parts and the sunshade of the present invention;

[0051] Figure 2 It is a position relationship diagram of the inter-column support prefabricated parts and the horizontal support prefabricated parts of the present invention;

[0052] Figure 3 It is a schematic diagram of the structure of the support member of the present invention;

[0053] Figure 4 It is a schematic cross-sectional structure diagram of an embodiment of a connecting piece of the present invention;

[0054] Figure 5 It is a schematic cross-sectional structure diagram of another embodiment of a connecting piece of the present invention;

[0055] Figure 6 is a schematic cross-sectional structure diagram of another embodiment of a rolling element of the present invention;

[0056] Figure 7 It is a schematic diagram of the connection relationship between the transition support prefabricated member of the present invention and the inter-column support prefabricated member and the horizontal support prefabricated member;

[0057] Figure 8 It is a structural schematic diagram of the three-way prefabricated component of the present invention;

[0058] Fig. 9 The present invention is a flow chart of the method for producing prefabricated steel structure parts.

[0059] In the figure, 1. inter-column support prefabricated part, 11. curved section, 12. straight section, 2. horizontal support prefabricated part, 21. curved prefabricated unit, 3. transition support prefabricated part, 31. prefabricated plate, 32. anti-loosening nut assembly, 321. fixing frame, 322. anti-loosening nut, 4. support member, 41. convex rib, 42. locking position, 5. connecting member, 51. accommodating cavity, 52. elastic member, 53. mounting seat, 54. rolling body, 541. annular groove, 55. groove, 56. first mounting hole, 6. tee prefabricated part, 62. trumpet mouth, 7. sun visor. DETAILED DESCRIPTION

[0060] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0061] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0062] Example

[0063] The parking shed is mainly composed of an arc-shaped longitudinal support fixed to the ground, a transverse support installed on the arc-shaped longitudinal support, and a sunshade laid on the transverse support. The existing structure of the arc-shaped longitudinal support steel structure prefabricated parts and the transverse support steel structure frame prefabricated parts used for the parking shed support body adopt an integral welding process, that is, multiple steel structures are integrally welded in the processing plant, and finally formed into a steel structure prefabricated part with a curved structure. Because it has a certain curvature and a relatively large volume, it causes certain difficulties during transportation and requires large vehicles for loading. In addition, because the steel structure has a certain curvature, a hoisting mechanism is required for coordinated installation during the installation process. During the installation process, due to the existence of the curvature, the center of gravity of the prefabricated part is not in the vertical direction. Therefore, during the installation process, the prefabricated part is easily offset, causing the fixing part used to fix the bottom of the prefabricated part to bend and deform, thereby reducing the reliability and stability of the fixed installation.

[0064] Based on this, in order to solve the technical problems of inconvenient transportation of the steel structure prefabricated parts for the parking shed and easy bending and deformation in the fixing parts, this embodiment provides an assembled steel structure prefabricated part (suitable for the parking shed), referring to Figure 1-8 , including: inter-column support prefabricated parts 1, horizontal support prefabricated parts 2 and transition support prefabricated parts 3. Figure 1 As shown, several inter-column support prefabricated members 1 are arranged at intervals on the ground to carry and distribute other components located on top of the inter-column support prefabricated members 1. Figure 2As shown, a single inter-column support prefabricated member 1 is provided with a curved section 11 and a straight section 12, and the curved section 11 and the straight section 12 are assembled and spliced ​​end to end, and the end of the straight section 12 is inserted into the ground and fixed to the ground by bolts or pins. The horizontal support prefabricated member 2 is mounted on the inter-column support prefabricated member 1, corresponding to the inter-column support prefabricated member 1, and two adjacent horizontal support prefabricated members 2 form a horizontal support platform, which spans across two adjacent inter-column support prefabricated members 1. Among them, the single horizontal support prefabricated member 2 is composed of a plurality of curved prefabricated monomers 21 assembled and spliced ​​end to end, and the plurality of curved prefabricated monomers 21 form an arc surface, and the position of the arc surface away from one end of the straight section 12 is higher than the height close to one end of the straight section 12, forming a slope with an arc, which is used to support the laying of the sunshade 7, so that the sunshade 7 is high at one end and low at the other end, so that rainwater can directly fall to the ground along the slope, avoiding rainwater accumulation on the sunshade 7. The transition support prefabricated member 3 is disposed between the inter-column support prefabricated member 1 and the horizontal support prefabricated member 2, and is fixedly connected to the inter-column support prefabricated member 1 and the horizontal support prefabricated member 2 respectively, and is used to fix the inter-column support prefabricated member 1 and the horizontal support prefabricated member 2.

[0065] This innovative solution transforms the steel structure prefabricated components used in the carport into modular units that are easy to assemble, with a particular focus on the inter-column support prefabricated component 1, which cleverly and flexibly assembles the curved section 11 and the straight section 12 to form a complete support member with a natural curvature. These modules can be easily disassembled into independent units for transportation needs; conversely, they can be quickly and effectively combined into one at the installation site. In addition, the horizontal support prefabricated component 2 is seamlessly spliced ​​through multiple prefabricated curved prefabricated monomers 21 to form a smooth arc-shaped structure. This modular concept significantly reduces the transportation burden. At the same time, this segmented splicing installation method, after the prefabricated components on the ground are fixed and installed stably, the remaining prefabricated components are spliced ​​and assembled in sequence, reducing the risk of displacement of steel structure prefabricated components or deformation of fixed components during installation, thereby improving the quality of the project.

[0066] It should be noted that, in this embodiment, the curved segment 11, the straight segment 12, and the curved prefabricated unit 21 all include: a plurality of hollow support members 4 (refer to Figure 3As shown in the figure, only the structural schematic diagram of the curved section 11 is shown, and the features of the straight section 12 or the vertical steel structure component that is the same as the straight section 12 are the same as the curved section 11 except that it does not have a curvature). A connector 5 is provided in the support member 4, and any connector 5 is inserted into the cavity of another support member 4 and fixedly connected to each other. The support member 4 and the connector 5 are spliced ​​end to end to form an assembled connection structure. In this scheme, the hollow-designed support member 4 not only reduces the overall weight of the prefabricated parts and reduces the burden of transportation and installation, but also ensures sufficient structural strength and rigidity through reasonable structural design, meeting the bearing requirements of steel structure prefabricated parts in places such as parking sheds. The connector 5 provided in the support member 4 is inserted into the cavity of the adjacent support member 4 and fixedly connected. This assembled structure spliced ​​end to end greatly simplifies the installation process and improves construction efficiency. At the same time, this connection method is tight and stable, effectively preventing loosening and dislocation between prefabricated parts, and ensuring the stability and safety of the overall structure.

[0067] Based on the above embodiments, in some embodiments, reference Figure 3 The inner wall of the support member 4 is provided with a plurality of convex ribs 41 arranged at intervals along the direction in which the connecting member 5 extends, and one end of the connecting member 5 facing the convex rib 41 is provided with a Figure 4The groove 55 shown is placed on the rib 41 and corresponds to each other. The groove 55 can slide relative to the rib 41. The sliding in this embodiment is damped sliding, that is, the groove 55 and the rib 41 are closely matched with each other. They can slide relative to each other only when an external force is applied. The damped sliding usually occurs after the static friction force is overcome, that is, the required external force is at least equal to the static friction force. The static friction force Fs can be calculated by the following formula: Fs=μ×Fn; where Fn is the positive pressure, that is, the vertical force between the contact surface of the rib 41 and the groove 55, and μ represents the friction coefficient. In practical applications, this force may be generated by the deadweight, preload or other external loads of the connector 5. For most metal-to-metal contacts (such as steel and steel), the static friction coefficient μ is usually between 0.1 and 0.3, but the specific value depends on factors such as surface conditions, lubrication conditions and temperature. Assuming that the positive pressure Fn between the rib 41 and the groove 55 is mainly generated by the deadweight or preload of the connector 5, the magnitude of this force will vary according to the specific design. For simplicity, we can assume that Fn is a medium-sized force, such as a few hundred to a few thousand Newtons (this depends entirely on the size and weight of the connector 5). Apply the formula for static friction Fs = μ × Fn, and take an intermediate value of μ (such as 0.2) for estimation. If Fn is 1000 Newtons, then the static friction Fs is about 200 Newtons. However, damping sliding usually requires a force greater than static friction, because in addition to overcoming static friction, it is also necessary to overcome small elastic deformations and possible local yielding between materials. In order to give a rough range, it is assumed that the external force required for damping sliding is 1.5 to 3 times the static friction (this range is very rough and depends on many factors). Therefore, based on the above assumptions and estimates, the external force required for damping sliding may be roughly in the range of 300 to 600 Newtons (if Fn is 1000 Newtons). However, it should be noted that this is only a very rough estimate and may vary greatly in actual applications. The support member 4 is provided with a locking position 42, and when the connector 5 reaches the locking position 42, the support member 4 and the connector 5 are fixed to each other. In this solution, the rib 41 serves as a guide structure to guide the connector 5 to be smoothly inserted into the cavity of the support member 4, and plays a positioning role during the installation process to ensure that the connector 5 can be accurately aligned and inserted. This not only simplifies the installation steps, but also improves the installation accuracy and reduces the problems caused by misaligned installation. In addition, the close combination of the rib 41 and the groove 55 increases the contact area between the prefabricated parts and improves the rigidity and toughness of the connection parts. Under the action of external forces such as earthquakes, this design can more effectively disperse and absorb impact forces and improve the seismic resistance and safety of the overall structure. The locking position 42 set on the support member 4 allows the connector 5 to be locked when it reaches the predetermined position, ensuring a stable connection between the connector 5 and the support member 4.This design allows the prefabricated parts to be flexibly adjusted as needed during the installation process and to be firmly locked in the final position, ensuring the stability and safety of the overall structure.

[0068] In some embodiments, the present invention further comprises a locking assembly, the locking assembly comprising a locking member and a fastening bolt, and the connecting member 5 is provided with a Figure 4 The first mounting hole 56 shown in the figure, the support member 4 is provided with a second mounting hole. When the connector 5 is inserted into the support member 4, the first mounting hole 56 and the second mounting hole are in position corresponding to each other and reach the locking position 42. The locking member is inserted into the first mounting hole 56 and the second mounting hole and is fastened by the fastening bolt. In order to effectively avoid the technical problem that the locking member is corroded in the first mounting hole 56 and the second mounting hole due to rainwater erosion, resulting in the inability to disassemble, the present solution can fix a rubber sealing ring at the threaded hole of the first mounting hole 56 and the second mounting hole. The inner surface of the rubber sealing ring is provided with a thread with the same number of turns as the first mounting hole 56 and the second mounting hole. When locking is required, the locking member (equivalent to a bolt) is screwed into the thread of the rubber sealing ring and extends out of the first mounting hole 56 and the second mounting hole to be fastened with the fastening bolt. In the present solution, the introduction of the locking assembly makes the connection between the connector 5 and the support member 4 more firm and reliable, and effectively prevents safety accidents caused by loose connection or falling off. Especially in places such as parking lots that need to bear vehicle loads, this design can significantly improve the safety of the structure and protect the safety of people and vehicles. The installation process of the locking assembly requires that the first mounting hole 56 and the second mounting hole must be accurately aligned to successfully insert the locking piece. This process prompts the installer to be more careful and precise during installation, thereby improving the installation accuracy of the overall structure. At the same time, the coordinated use of the locking piece and the fastening bolt also ensures the stability of the connecting piece 5 in the locking position 42, avoiding structural problems caused by installation errors.

[0069] In order to further improve the overall installation convenience of the steel structure, in some other embodiments, reference Figure 5The end of the connecting member 5 adjacent to the groove 55 is recessed inward to form an accommodating chamber 51. An elastic member 52 is fixedly installed in the accommodating chamber 51. The elastic member 52 can be a compression spring. A mounting seat 53 is fixedly connected to the end of the elastic member 52 away from the accommodating chamber 51. A slide rail is fixedly installed on the inner wall of the accommodating chamber 51. The mounting seat 53 is placed on the slide rail and can slide relatively. The mounting seat 53 is provided with an opening on the side facing the inner wall of the support member 4. A rolling body 54 is clamped at the opening. The rolling body 54 and the opening can rotate relatively. A through groove is provided on the support member 4. When the connecting member 5 reaches the locking position 42, the rolling body 54 is placed in the through groove and can be ejected to the outside of the support member 4. In this solution, another locking method is provided, that is, when the locking end of the connector 5 is placed in the inner cavity of the support 4, the rolling body 54 is compressed and rolled along the inner wall of the support 4; when the rolling body 54 falls into the through groove, the elastic member 52 allows the mounting seat 53 to slide along the direction of the slide rail, and finally the rolling body 54 is ejected to the outside of the support 4, and the rolling body 54 is limited by the through groove. Among them, the rolling body 54 is designed to be ejected to the outside of the support 4, and this feature makes the unlocking or disassembly process simple and quick. The user does not need to use complicated tools or perform cumbersome operations, and can release the connector 5 through simple operations, which greatly improves the convenience of use.

[0070] Based on the above embodiments, reference Figure 6 , an annular groove 541 is provided on the side of the rolling body 54 close to the support member 4. When the connecting member 5 reaches the locking position 42, the annular groove 541 is ejected to the outside of the support member 4. At this time, a retaining spring is inserted into the annular groove 541, and the area of ​​the retaining spring is larger than the area of ​​the through groove. In this scheme, when the connecting member 5 reaches the locking position 42 and the annular groove 541 is ejected to the outside of the support member 4, the retaining spring is inserted into the annular groove 541. Since the area of ​​the retaining spring is larger than the area of ​​the through groove, this design effectively prevents the rolling body 54 from accidentally returning or loosening when subjected to external force. The presence of the retaining spring forms an additional locking mechanism, which significantly enhances the stability and safety of the connection. At the same time, due to the obvious visual identification of the retaining spring, the operator can intuitively confirm whether the connecting member 5 has reached the locking position 42 and is correctly locked. At the same time, when unlocking, the retaining spring also needs to be removed from the annular groove 541 first. This step increases the clarity of the operation and avoids connection failure caused by misoperation.

[0071] Among them, reference Figure 7The transition support prefabricated part 3 includes: a prefabricated plate 31 with threaded holes, and a flexible contact surface is provided on the side where the prefabricated plate 31 is connected to the horizontal support prefabricated part 2. In a very embodiment, the flexible contact surface can be an elastic pad made of rubber material, which is directly adhered to the prefabricated plate 31. A locking nut assembly 32 is provided on the reinforcing rib plate of the horizontal support prefabricated part 2, and the prefabricated plate 31 and the locking nut assembly 32 are fixed to each other by bolts. In this scheme, the threaded holes provided on the prefabricated plate 31 are combined with the locking nut assembly 32 of the horizontal support prefabricated part 2 to ensure the tightness and stability of the connection. The locking nut assembly 32 effectively prevents the bolts from loosening due to vibration, thereby improving the reliability of the overall structure. In addition, the design of the flexible contact surface forms a smoother transition between the prefabricated plate 31 and the horizontal support prefabricated part 2, which is conducive to dispersing stress and enhancing the bearing capacity of the connection. This design can better resist the effects of external forces and loads, thereby improving the stability and safety of the overall structure. Among them, the anti-loosening nut assembly 32 mainly includes a fixing frame 321 of a reinforcing rib plate fixedly installed on the bent prefabricated unit 21, and a anti-loosening nut 322 is fixed on the fixing frame 321. A locking washer (for example, a serrated washer or a corrugated washer) is fixedly installed on the threaded inner ring of the anti-loosening nut 322, and a matching bolt can be screwed into the anti-loosening nut 322 to prevent the bolt from loosening.

[0072] In order to further prevent the above-mentioned bolts from loosening or allow the bolts to be automatically tightened after loosening, in some embodiments, a DC motor is fixedly mounted on the prefabricated plate 31, the output shaft of the DC motor is fixedly connected to the bolt, one end of the DC motor is connected to the normally closed contact of the relay, the other end of the DC motor is connected to the external power supply, and a switch is connected in series between the coil circuit of the relay and the power supply, the positive pole of the switch is fixed to the end of the prefabricated plate 31 facing the bolt, and the negative pole of the switch is fixed to the end of the bolt facing the prefabricated plate 31. When the bolt is loose and separated from the prefabricated plate 31, the switch is disconnected, the relay coil is not energized, and the normally closed contact of the relay remains in a closed state, and then the motor forms a complete circuit loop, the DC motor starts to work, and drives the bolt to rotate close to the prefabricated plate 31. When the bolt approaches the prefabricated plate 31, until the switch is closed, the relay coil is energized, the normally closed contact of the relay is disconnected, the circuit loop of the DC motor is cut off, the DC motor stops working, and the bolt is tightened. In this scheme, a complete bolt automatic tightening and anti-loosening function is formed by using a circuit system such as a DC motor, a relay, a switch, and a power supply. When the bolts loosen due to vibration or other reasons, the switch automatically disconnects, triggering the DC motor to work, driving the bolts to rotate and re-close to the precast plate 31. This process does not require manual intervention, improves the timeliness and efficiency of maintenance, and reduces safety hazards caused by loose bolts.

[0073] In order to further improve the practical performance of the parking shed, the straight section 12 of the column support prefabricated member 1 is plug-connected and fixedly connected with a Figure 8 The three-way prefabricated component 6 shown in the figure extends to the tail of the curved prefabricated monomer 21 arranged opposite to the straight section 12, and a bell mouth 62 is provided at one end of the three-way prefabricated component 6 facing the tail, and a rain collecting trough is overlapped between the adjacent bell mouths 62, and rainwater can smoothly enter the bell mouth 62 along the rain collecting trough until it reaches the cavity of the inter-column support prefabricated component 1. In this scheme, the design of the three-way prefabricated component 6 not only realizes a stable structural connection, but also cleverly integrates the drainage function. By setting a bell mouth 62 at one end thereof and overlapping the rain collecting trough with the adjacent bell mouths 62, an efficient rainwater collection and discharge system is formed. Rainwater can smoothly flow into the bell mouth 62 along the rain collecting trough, and then enter the cavity of the inter-column support prefabricated component 1. The rainwater can be used for irrigation, flushing toilets and other purposes in subsequent treatment, realizing the rational use of rainwater resources, conforming to the concept of green building and sustainable development, and promoting the use of rainwater resources. In this solution, the internal structure of the three-way prefabricated component 6 is also provided with corresponding supporting components 4 and connecting components 5. This structure is the same as the curved section 11, the straight section 12, and the curved prefabricated unit 21, and can be effectively connected by plugging and fixing the connecting component 5 with the adjacent supporting components 4.

[0074] In order to further illustrate the production and processing method of the curved segment 11, the straight segment 12, and the curved prefabricated monomer 21 in the present invention, a production method of an assembled steel structure prefabricated part is proposed. Fig. 9 , including the following steps:

[0075] Step 1: Pretreatment of steel:

[0076] Step 1.1: Select at least two sizes of steel as the raw materials for the support members 4 and connectors 5 of the inter-column support prefabricated members 1 and the horizontal support prefabricated members 2. The two sizes of steel are hollow steels, one large and one small. The small-sized steel can be inserted into the large-sized steel. Both types of steel meet the Q345B structural steel standard and have good mechanical properties and weldability.

[0077] Step 1.2: Confirm that there are no defects such as cracks, rust, slag inclusions, etc. on the steel surface to ensure the quality of raw materials.

[0078] Step 1.3: Cutting and classification: According to the requirements of the design drawings, the two specifications of steel are accurately cut, and the raw materials of the support parts 4 and connecting parts 5 used for the inter-column support prefabricated parts 1 and the horizontal support prefabricated parts 2 are distinguished and marked to ensure that the materials are used correctly in the subsequent processing and that spare materials have been obtained.

[0079] Step 2: Bending process:

[0080] Use a bending machine to bend no more than 1 / 3 of the spare materials to form bent arc parts. Among them, a fully automatic CNC bending machine with a maximum bending length of 3000mm is selected, which can accurately control the bending angle and arc. The fully automatic CNC bending machine is usually 3+1 axis (Y1, Y2, X, V), in which the Y1 and Y2 axes control the synchronous movement and positioning of the two ends of the slider, the X axis controls the overall forward and backward movement and positioning of the rear stopper, and the V axis is used for workbench disturbance compensation. The curvature of the bend needs to be bent according to the curvature of the actual inter-column support prefabricated part 1 and the horizontal support prefabricated part 2 of the parking shed, while the steel of the straight section 12 does not need to be bent.

[0081] Step 3: Heating and stamping process:

[0082] After heating the remaining spare materials and the bending arc parts, a stamping machine is used to stamp out several ribs 41 or grooves 55 along the length direction. Among them, the heating temperature is usually 800-900°C. After stamping, the stamped parts need to be cooled, and the cooling method generally adopts natural cooling or air cooling. It should be noted that the cooling method in this process is not easy to adopt the water quenching method, because water quenching may cause greater thermal stress inside the steel, thereby increasing the risk of cracking, so the cooling speed and temperature need to be carefully controlled during use.

[0083] Step 4: Cutting Process:

[0084] Use a cutting machine to cut the stamped profiles separately. After cutting and forming, use a grinder to grind the cut surface to remove burrs and obtain the cut parts. Before cutting, the steel needs to be fully inspected to ensure that there are no defects such as cracks, wrinkles, deformation, etc. on the surface to ensure the quality of cutting. During the grinding process, first use a coarse-grained grinding wheel to remove burrs and obvious unevenness, and then gradually transition to a fine-grained grinding wheel until the cut surface is smooth, without scratches and burrs. During the grinding process, it is necessary to control the force and angle to avoid excessive grinding resulting in insufficient material thickness or shape changes.

[0085] Step 5: Punching, degreasing and rust removal:

[0086] Step 5.1: Use a laser punching machine to punch holes in the cut parts for subsequent installation of bolts and locking accessories;

[0087] Step 5.2: Use a high-pressure water gun (pressure ≥ 20MPa) to rinse the cut parts after drilling;

[0088] Step 5.3: Immerse the cut parts in an alkaline cleaning agent (such as NaOH solution) to remove oil and rust. The immersion time is generally 10 to 15 minutes. After cleaning, rinse with clean water and dry thoroughly with drying equipment to obtain a clean prefabricated part.

[0089] Step 6: Anti-rust treatment:

[0090] Environmentally friendly zinc-aluminum alloy anti-rust paint is selected, and plasma spraying equipment is used to evenly spray the inner cavity and outer surface of the clean prefabricated parts to form a certain thickness of anti-rust layer (usually the coating thickness is between 0.2-0.5mm). During the spraying process, the spraying speed and the distance of the spray gun need to be controlled to ensure that the coating is uniform and dense, thereby improving the anti-rust effect.

[0091] In this method, step 1, step 2, step 3, step 4, step 5, and step 6 correspond to Fig. 9 S1, S2, S3, S4, S5, S6 in it.

[0092] In the description of the present invention, it is necessary to understand that the terms "middle", "length", "up", "down", "front", "back", "vertical", "horizontal", "inside", "outside", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0093] In the present invention, unless otherwise clearly specified and limited, the first feature "on" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. "Multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0094] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] The above is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention without creative work should be included in the protection scope of the present invention.

Claims

1. Prefabricated steel structure, characterized in that: include: The inter-column support prefabricated parts have several gaps arranged on the ground, and a single inter-column support prefabricated part is provided with a curved section and a straight section, the curved section and the straight section are assembled and spliced ​​end to end, and the end of the straight section is fixed to the ground; A horizontal support prefabricated member is mounted on the inter-column support prefabricated member and corresponds to the inter-column support prefabricated member. A single horizontal support prefabricated member is formed by a plurality of curved prefabricated monomers assembled end to end. The plurality of curved prefabricated monomers form an arc surface. The position of the arc surface away from one end of the straight segment is higher than the height close to one end of the straight segment. The transition support prefabricated member is arranged between the inter-column support prefabricated member and the horizontal support prefabricated member, and is fixedly connected to the inter-column support prefabricated member and the horizontal support prefabricated member respectively; The curved section, straight section and curved prefabricated monomer all include: a plurality of hollow support members, each of which is provided with a connecting member, any one of which is inserted into the cavity of another support member and fixedly connected to each other, and the support members and the connecting members are successively spliced ​​end to end to form an assembled connection structure; The inner wall of the support member is provided with a plurality of convex ribs arranged at intervals along the direction in which the connecting member extends. The connecting member is provided with a groove at one end facing the convex rib. The groove is placed on the convex rib and corresponds to the convex rib one by one. The groove can slide relative to the convex rib. The support member is provided with a locking position. When the connecting member reaches the locking position, the support member and the connecting member are fixed to each other.

2. The prefabricated steel structure according to claim 1, characterized in that: It also includes a locking assembly, which includes a locking piece and a fastening bolt. The connecting piece is provided with a first mounting hole, and the supporting piece is provided with a second mounting hole. When the connecting piece is inserted into the supporting piece, the first mounting hole and the second mounting hole reach a locking position when their positions correspond. The locking piece is inserted into the first mounting hole and the second mounting hole, and they are fastened by the fastening bolt.

3. The prefabricated steel structure according to claim 1, characterized in that: One end of the connecting member adjacent to the groove is inwardly recessed to form an accommodating cavity, an elastic member is fixedly installed in the accommodating cavity, an end of the elastic member facing away from the accommodating cavity is fixedly connected to a mounting seat, a slide rail is provided on the inner wall of the accommodating cavity, and the mounting seat is placed on the slide rail and can slide relatively; The mounting seat is provided with an opening on one side facing the inner wall of the support member, a rolling body is clamped at the opening, and the rolling body and the opening can rotate relative to each other; The support member is provided with a through groove. When the connecting member reaches the locking position, the rolling body is placed in the through groove and can be ejected to the outside of the support member.

4. The prefabricated steel structure according to claim 3, characterized in that: An annular groove is provided on one side of the rolling body close to the support member. When the connecting member reaches the locking position, the annular groove is ejected to the outside of the support member. At this time, a retaining ring is clamped in the annular groove, and the area of ​​the retaining ring is larger than the area of ​​the through groove.

5. The prefabricated steel structure according to claim 1, characterized in that: The transition support prefabricated component includes: a prefabricated plate with threaded holes, a side of the prefabricated plate connected to the horizontal support prefabricated component is provided with a flexible contact surface, the horizontal support prefabricated component is provided with a locking nut assembly, and the prefabricated plate and the locking nut assembly are fixed to each other by bolts.

6. The prefabricated steel structure according to claim 5, characterized in that: A DC motor is mounted on the prefabricated plate, the output shaft of the DC motor is fixedly connected to the bolt, one end of the DC motor is connected to the normally closed contact of the relay, the other end of the DC motor is connected to an external power supply, and a switch is connected in series between the coil circuit of the relay and the power supply, the positive pole of the switch is fixed to the end of the prefabricated plate facing the bolt, and the negative pole of the switch is fixed to the end of the bolt facing the prefabricated plate; When the bolts loosen and separate from the prefabricated board, the switch is disconnected, the relay coil is not energized, and the normally closed contacts of the relay remain closed. Then the motor forms a complete circuit loop, and the DC motor starts working, driving the bolts to rotate closer to the prefabricated board; When the bolt approaches the prefabricated plate until the switch is closed, the relay coil is energized, the normally closed contact of the relay is disconnected, the circuit loop of the DC motor is cut off, the DC motor stops working, and the bolt is tightened.

7. The prefabricated steel structure according to claim 1, characterized in that: Also includes: A hollow three-way prefabricated component is plug-in fixedly connected to the straight section of the inter-column support prefabricated component. The three-way prefabricated component extends to the tail of the curved prefabricated unit arranged opposite to the straight section, and the three-way prefabricated component is provided with a bell mouth at one end facing the tail, and rainwater collecting gutters are overlapped between adjacent bell mouths, so that rainwater can smoothly enter the bell mouths along the rainwater collecting gutters until it reaches the cavity of the inter-column support prefabricated component.

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