A dovetail type modular steel structure house

Abstract

The application relates to the technical field of steel structure assembly type buildings, and discloses a dovetail type modular steel structure house, which comprises a modular house, side plates A and B, positioning plates A and B, dovetail joints and a sealing plate; the side plates A and B are respectively welded on two adjacent modular houses; the positioning plates A and B are located in a cavity surrounded by the modular house and two side plates A and two side plates B; the positioning plate A is provided with a dovetail joint hole A, and the positioning plate B is provided with a dovetail joint hole B; the dovetail joint is inserted into a positioning opening formed by the dovetail joint hole A and the dovetail joint hole B; the dovetail joint is buckled on the positioning plate B through a pre-locking buckle; and the sealing plate is screwed and connected at the front and back ends of the positioning plates A and B and is used for sealing the positioning plates A, the positioning plates B and the dovetail joint. Based on the traditional mortise and tenon structure, the dovetail joint and the corresponding dovetail joint hole are precisely designed, so that the modular houses are quickly and accurately connected.

Description

Technical Field

[0001] This invention belongs to the field of steel structure prefabricated building technology, specifically relating to a dovetail tenon modular steel structure house. Background Technology

[0002] Modular architecture refers to low-rise or multi-story buildings constructed by assembling and connecting one or more prefabricated steel structural modules, either manufactured in a factory or assembled on-site. Each prefabricated module can be a fully furnished room unit complete with all necessary plumbing and finishing, including decoration, heating, plumbing, and lighting. Modular units can be used to form complete rooms, as part of larger rooms, or to create specialized service units.

[0003] Modular steel structure methods are widely used in single- and multi-story smart houses, cultural tourism cabins, and other buildings. As is characteristic of modular buildings, each module unit is a complete structural system composed of top beams, bottom beams, and columns. Adjacent modules transfer loads and coordinate deformations through corresponding connection nodes, allowing multiple units to form an integrated structure of a certain scale.

[0004] After the above installations form individual cabins, they often need to be assembled into multi-cabin structures according to actual requirements for use and other needs, in order to adapt to different scenarios. Existing bolted connection methods have drawbacks such as long construction cycles, complex processes, and susceptibility to damage to the cabins. Traditional bolted connections require on-site drilling and bolt tightening, which are time-consuming, especially in large modular building projects, significantly extending the construction period. Bolted connections require precise measurements and drilling, demanding high skill levels from construction personnel, and are prone to weak connections due to construction errors. Bolted connections may leave holes in the cabin, which may affect the cabin's waterproofing and insulation performance, and may lead to structural fatigue over long-term use. The disassembly and assembly process of bolted connections is relatively cumbersome, requiring the individual loosening and tightening of bolts, which increases maintenance costs and time for modular houses that require frequent disassembly and assembly.

[0005] In view of this, we propose a dovetail tenon modular steel structure house to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the technical problems of modular houses connected by bolts in the prior art, which have long construction cycles, complex processes, and are prone to damage to the cabin.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A dovetail-joint modular steel structure house includes a modular house, side panels A and B, positioning plates A and B, dovetail joints, and end plates;

[0009] Side panel A and side panel B are welded to the joints at both ends of two adjacent modular houses on the left and right or on the top and bottom, respectively.

[0010] After positioning plate A and positioning plate B are joined together, they are located in the cavity enclosed by two adjacent modular houses and two side plates A and two side plates B; several dovetail mortises A are arranged at equal intervals on positioning plate A, and dovetail mortises B that are joined with dovetail mortises A are arranged at equal intervals on positioning plate B.

[0011] The dovetail tenon is inserted into the positioning opening formed by the dovetail mortise A and dovetail mortise B; the two ends of the channel inside the dovetail tenon are provided with pre-locking buckles, which fasten the dovetail tenon to the positioning plate B.

[0012] The sealing plate thread is connected to the front and rear ends of positioning plate A and positioning plate B and is used to seal positioning plate A, positioning plate B and dovetail tenon.

[0013] This dovetail-joint modular steel structure house is primarily based on traditional mortise and tenon joints. Through precisely designed dovetail tenons and corresponding mortise holes, it achieves rapid and precise connections between modular units. The modular house consists of multiple prefabricated modular units, each with a complete structural system, including top beams, bottom beams, and columns. Side panels A and B are welded to the joints of adjacent modular units, forming the foundation for the connection. Positioning plates A and B, after being joined, are located within the cavity formed by the adjacent modular unit and side panels A and B. Positioning plate A has a dovetail tenon A, and positioning plate B has a corresponding dovetail tenon B. The dovetail tenon is inserted into the positioning opening formed by these two mortise holes, achieving precise alignment and connection. Pre-locking buckles are located at both ends of the channel inside the dovetail tenon. These buckles can be mechanically locked onto positioning plate B after the dovetail tenon is inserted, ensuring the stability of the connection. Sealing plates are threaded to the front and rear ends of positioning plates A and B, sealing the positioning plates and dovetail tenons, completing the final fixation and sealing.

[0014] Preferably, positioning plates A and B have longitudinally arranged side limiting grooves at their center positions on the left and right ends, respectively. The protrusions A on the two side plates A and B on the two side plates B engage with these side limiting grooves. This prevents positional misalignment during installation and improves assembly accuracy.

[0015] Preferably, side plate A has bolt holes A, and side plate B has bolt holes B. Positioning plates A and B have threaded holes A on their left and right sides, symmetrically arranged with bolt holes A and B, respectively. Side plate A is fixed to positioning plates A and B with bolts passing through bolt holes A and threaded holes A, and side plate B is fixed to positioning plates A and B with bolts passing through bolt holes B and threaded holes A. The design of bolt holes A, bolt holes B, and threaded holes A ensures a stable connection between side plates A and B and positioning plates A and B.

[0016] Preferably, positioning plates A and B each have threaded holes B on their front and rear sides. The sealing plate has bolt holes C symmetrically arranged with the threaded holes B. The sealing plate is fixed to positioning plates A and B by bolts threaded through bolt holes C and connected to threaded holes B. The fixing of the sealing plate to the bolts in threaded holes C and B effectively seals the gap between positioning plates A and B, improving overall sealing and contributing to waterproofing and insulation. The fixed sealing plate increases the strength of the entire structure, preventing structural problems caused by loose connections.

[0017] Preferably, positioning plate A has a positioning groove at its bottom left end; positioning plate B has a positioning protrusion at its top left end that inserts into the positioning groove. The design of the positioning groove and the positioning protrusion ensures accurate alignment between positioning plate A and positioning plate B, avoiding misalignment problems during installation.

[0018] Preferably, the bottom of the dovetail mortise B of the positioning plate B is provided with a limiting groove; the bottom of the dovetail tenon is provided with a limiting block that inserts into the limiting groove. The combined use of the limiting groove and the limiting block can ensure that the dovetail tenon can be accurately aligned when inserted into the dovetail mortise B, avoiding installation problems caused by inaccurate alignment.

[0019] Preferably, the two ends of the dovetail tenon have different cross-sectional sizes, which correspond to the opening sizes of the dovetail mortise A and dovetail mortise B.

[0020] Preferably, the pre-locking buckle includes an inverted U-shaped support plate fixed within the channel and having inverted U-shaped limiting sliding grooves on both sides; two sets of symmetrically arranged springs located below the inverted U-shaped support plate; a pre-locking block fixedly connected to the inverted U-shaped support plate and locking with the positioning plate B; an inverted L-shaped lever fixed to the top of the pre-locking block and extending through the inverted U-shaped support plate; a moving block fixed to the inverted L-shaped lever at the end away from the pre-locking block; and a cover plate located above the moving block. The pre-locking buckle allows for quick pre-fixation during installation, ensuring initial stability. Its structural design allows installers to easily lock and unlock the dovetail tenon, facilitating installation and disassembly.

[0021] Preferably, the pre-locking block is provided with a guide block that slides and guides in conjunction with the inverted U-shaped limiting sliding groove. This provides sliding guidance for the pre-locking block.

[0022] Preferably, the dovetail tenon has cover plates at both ends of the channel, with windows on the cover plates for the insertion of a moving block. A cover plate with a hole is located inside the cover plate and blocks the windows. The cover plates and cover plate with a hole protect the pre-locking mechanism inside the dovetail tenon, preventing dust and other debris from entering and extending the component's lifespan.

[0023] Compared with the prior art, the technical effects and advantages of the present invention are:

[0024] This dovetail-joint modular steel structure house has side panels A and B welded to the modular house. Side panels A and B have protrusions, while positioning plates A and B have grooves. Positioning plates A and B are fixed to the top / bottom or left / right surfaces of the modular house via insertion, ensuring accurate positioning with the side panels. Pre-drilled holes in side panels A and B, as well as positioning plates A and B, are secured with rivets after alignment. Positioning plates A and B have positioning openings; after positioning and fixing, dovetail tenons are inserted. The dovetail tenons have different cross-sectional sizes at both ends, corresponding to the opening sizes on positioning plates A and B. They are inserted intermittently from both sides of positioning plates A and B. Limiting blocks in the dovetail tenons ensure accurate positioning with positioning plates A and B. A pre-locking mechanism at the tenon of the dovetail tenon provides initial fixation after insertion, ensuring structural installation safety. Side panels A and B have the same side length as the modular house building. The lengths of positioning plates A and B and dovetail tenons are slightly smaller than those of side panels A and B. After the positioning plates A and B and dovetail tenons are installed, the sealing plate is installed to fix the positioning plates A and B and dovetail tenons.

[0025] The dovetail joint and positioning plate design allows for rapid installation and disassembly, while the pre-locking mechanism provides initial fixation, significantly reducing installation time and improving construction efficiency. This design also ensures the modular building can be freely combined vertically and horizontally, increasing architectural flexibility. The variable cross-section design of the dovetail joint and mortise makes integrated building decoration and seamless installation possible.

[0026] When modular house assembly is not required, the upper left and right side panels can serve as enclosure panels, forming a ventilated roof that helps reduce solar radiation heat and improve indoor comfort. The lower left and right side panels can be used as column bases, effectively insulating ground moisture and protecting the building structure. The central enclosure panel can be combined with LED light strips and photovoltaic panels, which are not only aesthetically pleasing but also provide lighting and power generation, achieving energy conservation and environmental protection.

[0027] Precise positioning and a fixed design ensure the stability of the overall structure. The installation process does not affect the original structure, waterproofing, or insulation of the modular house, maintaining its original performance. The pre-locking system and the stability of the mortise and tenon joints enhance construction safety. In conclusion, the dovetail joint modular steel structure housing technology provides an efficient, stable, and versatile solution for the modular building field. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the mounting structure of the sealing plate of the present invention;

[0029] Figure 2 This is a schematic diagram of the modular house structure of the present invention, showing the upper and lower parts combined.

[0030] Figure 3 This is a schematic diagram of the modular house structure of the present invention, showing its vertical and horizontal assembly.

[0031] Figure 4 This is a schematic diagram of the installation structure of side plate A and side plate B of the present invention;

[0032] Figure 5 This is a structural schematic diagram of the positioning plate A, positioning plate B, dovetail tenon, sealing plate, side plate A, and side plate B of the present invention;

[0033] Figure 6 This is a structural diagram of positioning plate A and positioning plate B of the present invention;

[0034] Figure 7 This is a schematic diagram of the dovetail tenon structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure after the dovetail tenon cover plate of the present invention has been removed;

[0036] Figure 9 This is a schematic diagram of the inverted U-shaped support plate and pre-locking block of the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of side plate A of the present invention;

[0038] Figure 11 This is a schematic diagram of the structure of side plate B of the present invention;

[0039] Figure 12 This is a schematic diagram of the sealing plate of the present invention.

[0040] In the picture:

[0041] 100. Modular house; 1. Positioning plate A; 2. Positioning plate B; 3. Dovetail tenon; 4. Sealing plate; 5. Side plate A; 6. Side plate B;

[0042] 1.1 Side limiting groove; 1.2 Positioning groove; 1.3 Dovetail tenon A; 1.4 Connecting threaded hole B;

[0043] 2.1 Positioning protrusion; 2.2 Connecting threaded hole A; 2.3 Dovetail mortise B; 2.4 Limiting groove;

[0044] 3.1 Inverted U-shaped limiting sliding groove; 3.2 Inverted U-shaped support plate; 3.3 Spring; 3.4 Pre-locking block; 3.5 Inverted L-shaped lever; 3.6 Actuating block; 3.7 Cover plate; 3.8 Cover plate; 3.9 Window; 3.10 Channel; 3.11 Limiting block; 3.12 Guide block;

[0045] 4.1 Bolt hole C;

[0046] 5.1 Protrusion A; 5.2 Bolt hole A;

[0047] 6.1 Bolt hole B; 6.2 Protrusion B. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0050] This application discloses a dovetail-joint modular steel structure house, including a modular house 100;

[0051] At the joint of two adjacent modular houses 100, side plates A5 and B6 are welded to both ends of the modular house 100. The cavity formed by the two adjacent modular houses 100 and the two side plates A5 and B6 is provided with a docking positioning plate A1 and a positioning plate B2. Several dovetail tenons A1.3 are arranged at equal intervals on the positioning plate A1. Dovetail tenons B2.3 are arranged at equal intervals on the positioning plate B2 to dock with the dovetail tenons A1.3. Dovetail tenons 3 are inserted into the positioning opening formed by the docking of dovetail tenons A1.3 and dovetail tenons B2. The front and rear ends of the positioning plate A1 and the positioning plate B2 are threaded together with sealing plates 4 for sealing the positioning plate A1, the positioning plate B2 and the dovetail tenons 3.

[0052] The positioning plates A1 and B2 have longitudinally arranged side limiting grooves at their center positions on both the left and right ends. Protrusions A5.1 on the two side plates A5 and B6.2 on the two side plates B6 engage with these side limiting grooves. This engagement design ensures precise alignment between the side plates A5 and B6 and the positioning plates A1 and B2, preventing positional misalignment during installation and improving assembly accuracy. The engagement of the side limiting grooves and protrusions enhances the connection stability between the side plates and the positioning plates, reducing shaking and displacement at the connection point, thereby improving the overall structural stability. This design simplifies the installation process, making assembly more intuitive and convenient.

[0053] The side plate A5 has bolt holes A5.2 and the side plate B6 has bolt holes B6.1. The left and right sides of the positioning plates A1 and B2 are respectively provided with connecting threaded holes A2.2 symmetrically arranged with bolt holes A5.2 and B6.1. The side plate A5 is fixed to the positioning plates A1 and B2 by bolts passing through bolt holes A5.2 and connecting threaded holes A2.2. The side plate B6 is fixed to the positioning plates A1 and B2 by bolts passing through bolt holes B6.1 and connecting threaded holes A2.2.

[0054] The front and rear sides of positioning plate A1 and positioning plate B2 are respectively provided with connecting threaded holes B1.4. The sealing plate 4 is provided with bolt holes C4.1 symmetrically arranged with the connecting threaded holes B1.4. The sealing plate 4 is fixed to the positioning plate A1 and positioning plate B2 by bolts that thread through the bolt holes C4.1 and the connecting threaded holes B1.4.

[0055] The design of bolt holes A5.2, B6.1, and threaded connection hole A2.2 ensures a secure connection between side plates A5 and B6 and positioning plates A1 and B2. The tightening of the bolts provides additional connection strength, ensuring structural safety. Bolted connections are more reliable than other connection methods (such as welding), easier to inspect and maintain, and reduce potential building hazards caused by connection problems. The sealing plate 4, fixed to the bolts in threaded hole C and threaded connection hole B1.4, effectively seals the gap between positioning plates A1 and B2, improving overall sealing and contributing to waterproofing and insulation. The fixing of sealing plate 4 increases the overall structural strength, preventing structural problems caused by loose connections. The design of sealing plate 4 also enhances the overall appearance of the building, making the connection points neater and more aesthetically pleasing.

[0056] The positioning plate A1 has a positioning groove 1.1 and a side limiting groove 1.2 at its bottom left end; the positioning plate B2 has a positioning protrusion 2.1 at its top left end that inserts into the positioning groove 1.2. The design of the positioning groove 1.2 and the positioning protrusion 2.1 ensures accurate alignment between the positioning plate A1 and the positioning plate B2, avoiding misalignment during installation. This design makes the installation process simpler and faster, reducing the measurement and adjustment work required during installation. The insertion of the positioning protrusion 2.1 increases the stability of the connection, further ensuring the safety and durability of the structure.

[0057] The bottom of the dovetail mortise B2.3 of the positioning plate B2 is provided with a limiting groove 2.4; the bottom of the dovetail tenon 3 is provided with a limiting block 3.11 that inserts into the limiting groove 2.4. The cooperation of the limiting groove 2.4 and the limiting block 3.11 ensures that the dovetail tenon 3 is accurately aligned when inserted into the dovetail mortise B2.3, avoiding installation problems caused by inaccurate alignment. The insertion of the limiting block 3.11 into the limiting groove 2.4 prevents excessive movement of the dovetail tenon 3 after installation, enhancing the stability of the structure. By limiting the range of movement of the dovetail tenon 3, potential safety risks caused by loose parts can be reduced.

[0058] The dovetail tenon 3 has two ends with different cross-sectional sizes, corresponding to the opening sizes of dovetail mortises A1.3 and B2.3. This dovetail tenon 3 design, with its corresponding opening sizes, increases the strength of the joint, making the structure more robust. Because of the dimensional matching between the dovetail tenon 3 and the dovetail mortises, alignment is easier during installation, reducing installation difficulty and time.

[0059] The dovetail tenon 3 has pre-locking buckles at both ends of the channel 3.10 inside the channel 3. The pre-locking buckles fasten the dovetail tenon 3 onto the positioning plate B2. The pre-locking buckles include an inverted U-shaped support plate 3.2 fixed inside the channel 3.10 and having inverted U-shaped limiting sliding grooves 3.1 on both sides; a pre-locking block 3.4 located below the inverted U-shaped support plate 3.2 and fixedly connected to the inverted U-shaped support plate 3.2 by two sets of symmetrically arranged springs 3.3 and locked in conjunction with the positioning plate B2; an inverted L-shaped lever 3.5 fixed to the top of the pre-locking block 3.4 and passing through the inverted U-shaped support plate 3.2; a lever 3.6 fixed on the inverted L-shaped lever 3.5 away from the end of the pre-locking block 3.4; and a cover plate 3.7 located above the lever 3.6. The pre-locking block 3.4 has a guide block 3.12 that slides and guides in conjunction with the inverted U-shaped limiting sliding grooves 3.1. The dovetail tenon 3 has cover plates 3.8 at both ends of the channel 3.10. The cover plates 3.8 have windows 3.9 for the insertion of the actuating block 3.6. The cover plate 3.7 is located inside the cover plate 3.8 and blocks the window 3.9.

[0060] When the pre-locking buckle engages the dovetail tenon 3 on the positioning plate B2, the pre-locking block 3.4 engages with the positioning plate B2. When the lock is released, the toggle block 3.6 is pushed upwards, the pre-locking block 3.4 is lifted, the spring 3.3 is compressed, and the pre-locking block 3.4 contacts and locks with the positioning plate B2.

[0061] The pre-locking mechanism allows for quick pre-fixation during installation, ensuring initial stability. The pre-locking design includes components such as an inverted U-shaped support plate 3.2, a spring 3.3, and a pre-locking block 3.4, which provide installation guidance, making the installation process more intuitive. The pre-locking structure allows installers to easily lock and unlock the dovetail tenon 3, facilitating installation and disassembly. The pre-locking block 3.4 and the inverted L-shaped lever 3.5 increase the safety of the connection, preventing accidental detachment during installation. The guide block 3.12, in conjunction with the inverted U-shaped limiting sliding groove 3.1, provides sliding guidance for the pre-locking block 3.4, ensuring smooth and accurate sliding into place. The cover plate 3.8 and the cover hole plate 3.7 protect the pre-locking mechanism and other structures inside the dovetail tenon 3, preventing dust and other debris from entering and extending the component's lifespan. The window 3.9 on the cover plate 3.8 allows the lever 3.6 to be easily inserted, facilitating installation. The cover plate 3.7 seals the window 3.9, improves the sealing of the dovetail joint 3, and helps to prevent water and dust.

[0062] This modular steel structure smart house with dovetail tenons is primarily based on traditional mortise and tenon joints. Through precisely designed dovetail tenons 3 and corresponding mortises, it achieves rapid and accurate connections between modular houses 100. Each modular house 100 consists of multiple prefabricated modular units, each with a complete structural system including top beams, bottom beams, and columns. Side panels A5 and B6 are welded to the joints of adjacent modular houses 100, forming the foundation for the connection. Positioning plates A1 and B2, after being joined, are located within the cavity formed by the adjacent modular houses 100 and side panels A5 and B6. Positioning plate A1 has a dovetail tenon A1.3, and positioning plate B2 has a corresponding dovetail tenon B2.3. The dovetail tenon 3 is inserted into the positioning opening formed by these two mortises, achieving precise alignment and connection. The channels 3.10 inside the dovetail tenon 3 have pre-locking buckles at both ends. These pre-locking buckles can be mechanically locked onto the positioning plate B2 after the dovetail tenon 3 is inserted, ensuring the stability of the connection. The sealing plate 4 is threaded to the front and rear ends of the positioning plates A1 and B, sealing the positioning plates and dovetail tenons 3, thus completing the final fixation and sealing.

[0063] The dovetail joint 3 and mortise mechanism make the installation of the modular house 100 quick and simple, and the pre-locking mechanism can quickly achieve initial fixation. The precise design of the dovetail joint 3 and mortise mechanism ensures high-precision alignment of the modular house 100, improving the overall quality and performance of the building. Through pre-locking and the fixing of the sealing plate 4, the connection has high stability and can withstand certain external forces and environmental pressures. The dovetail joint 3 connection structure is easy to disassemble and reinstall, facilitating future maintenance and upgrades. This connection method is suitable for various modular steel structure buildings and can be flexibly applied to different building scenarios and needs. The sealing and clean appearance of the dovetail joint 3 connection structure provide a good visual effect for the building.

[0064] Compared to traditional installation methods, which suffer from drawbacks such as high processing precision, high installation difficulty, numerous components, and low efficiency, the mortise and tenon joint design facilitates easy installation and dismantling, allows for pre-fixation, significantly reduces the installation cycle, and enables free vertical and horizontal combination of modular buildings without affecting the original structure, waterproofing, or insulation of the modular house. The dovetail tenon features a variable cross-section design at both ends and the mortise, with the two sides sequentially driven into the mortise for secure fixing, eliminating the need for pre-reserved installation work surfaces and achieving integrated building decoration and seamless installation. When modular house assembly is not required, the upper left and right side panels can be enclosed to form a ventilated roof, reducing solar radiation heat; the lower left and right side panels can be used as column bases to insulate against ground moisture; and the central sealing panel can be combined with LED light strips and photovoltaic panels.

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dovetail modular steel structure house, characterized in that, The utility model relates to a modular house positioning system, comprising: Side plate A (5) and side plate B (6), side plate A (5) and side plate B (6) are welded in the butt joint at the two ends of two modular houses (100) adjacent left and right or adjacent up and down respectively; Positioning plate A (1) and positioning plate B (2), positioning plate A (1) and positioning plate B (2) are located in the cavity surrounded by two side plate A (5) and two side plate B (6) after butt joint;Positioning plate A (1) is provided with a plurality of dovetail mortises A (1.3) arranged at equal distances, and positioning plate B (2) is provided with dovetail mortises B (2.3) arranged at equal distances and butt jointed with the dovetail mortises A (1.3); Dovetail (3), the dovetail (3) is inserted into the positioning opening formed by the butt joint of the dovetail mortises A (1.3) and the dovetail mortises B (2.3);The channel (3.10) on the inner side of the dovetail (3) is provided with a pre-locking buckle at both ends, and the dovetail (3) is buckled on the positioning plate B (2) through the pre-locking buckle; Cover plate (4), the cover plate (4) is threadedly butt jointed at the front and rear ends of the positioning plate A (1) and the positioning plate B (2) and is used for plugging the positioning plate A (1), the positioning plate B (2) and the dovetail (3); The center positions of the left and right ends of the positioning plate A (1) and the positioning plate B (2) are respectively provided with a longitudinally arranged side limiting groove (1.1), the protrusions A (5.1) on the two side plate A (5) and the protrusions B (6.2) on the two side plate B (6) are inserted into the side limiting groove (1.1) in cooperation; The side plate A (5) is provided with a bolt hole A (5.2), the side plate B (6) is provided with a bolt hole B (6.1), the left and right sides of the positioning plate A (1) and the positioning plate B (2) are respectively provided with a connecting thread hole A (2.2) symmetrically arranged with the bolt hole A (5.2) and the bolt hole B (6.1), the side plate A (5) is fixed on the positioning plate A (1) and the positioning plate B (2) through the bolt penetrating the bolt hole A (5.2) and the connecting thread hole A (2.2), and the side plate B (6) is fixed on the positioning plate A (1) and the positioning plate B (2) through the bolt penetrating the bolt hole B (6.1) and the connecting thread hole A (2.2); The front and rear sides of the positioning plate A (1) and the positioning plate B (2) are respectively provided with a connecting thread hole B (1.4), the cover plate (4) is provided with a bolt hole C (4.1) symmetrically arranged with the connecting thread hole B (1.4), and the cover plate (4) is fixed on the positioning plate A (1) and the positioning plate B (2) through the bolt penetrating the bolt hole C (4.1) and the bolt of the connecting thread hole B (1.4). The pre-locking buckle comprises an inverted U-shaped supporting plate (3.2) fixed in the channel (3.10) and provided with inverted U-shaped limiting sliding grooves (3.1) on both sides, a pre-locking block (3.4) located below the inverted U-shaped supporting plate (3.2) and connected with the inverted U-shaped supporting plate (3.2) through two groups of symmetrically arranged springs (3.3), a pre-locking block (3.4) connected with the inverted U-shaped supporting plate (3.2) and matched with the positioning plate B (2) for locking, an inverted L-shaped pulling rod (3.5) fixed on the top of the pre-locking block (3.4) and penetrating through the inverted U-shaped supporting plate (3.2), a pulling block (3.6) fixed on the end of the inverted L-shaped pulling rod (3.5) away from the pre-locking block (3.4), and a cover hole plate (3.7) located above the pulling block (3.6). The both ends of the channel (3.10) on the dovetail (3) are covered with cover plates (3.8), the cover plates (3.8) are provided with windows (3.9) matched with the pulling block (3.6) penetrating through, and the cover hole plate (3.7) is located on the inner side of the cover plate (3.8) and blocks the window (3.9).

2. A dovetail modular steel building structure according to claim 1, characterized in that: The left end of the positioning plate A (1) is provided with a positioning groove (1.2) in the bottom, and the left end of the positioning plate B (2) is provided with a positioning protrusion (2.1) inserted into the positioning groove (1.2) in the top.

3. A dovetail modular steel structure house according to claim 1, characterized in that: The bottom of the dovetail eye B (2.3) of the positioning plate B (2) is provided with a limiting groove (2.4), and the bottom of the dovetail (3) is provided with a limiting block (3.11) inserted into the limiting groove (2.4).

4. A dovetail modular steel structure house according to claim 1, characterized in that: The cross sections of the both ends of the dovetail (3) correspond to the opening sizes of the dovetail eye A (1.3) and the dovetail eye B (2.3).

5. A dovetail modular steel structure house according to claim 1, characterized in that: The pre-locking block (3.4) is provided with a guide block (3.12) matched with the inverted U-shaped limiting sliding groove (3.1) for sliding and guiding.

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