Connecting structure and building

Abstract

The utility model discloses a connecting structure and a building. The connecting structure comprises a first supporting column and a second supporting column which are in butt joint in the height direction, and an inserting assembly arranged at the butt joint position. The plug-in assembly comprises a connecting plate and a plug-in column, a plurality of fixing holes are formed in the connecting plate, and the plug-in column penetrates through the fixing holes and is fixed to the connecting plate; the upper face and the lower face of the connecting plate are connected with the first supporting column and the second supporting column respectively, the part, located on one side of the connecting plate, of the inserting column extends into the first supporting column, and the part, located on the other side of the connecting plate, of the inserting column extends into the second supporting column. According to the connecting structure, connection between the upper supporting column and the lower supporting column can be conveniently and rapidly achieved.

Description

Technical Field

[0001] The present invention relates to modular construction technology, and in particular to a connection structure and a building. Background Art

[0002] Support columns are provided at the corners of the prefabricated room modules, and when the upper and lower prefabricated room modules are connected, the support columns also need to be connected. In the prior art, the upper and lower support columns are connected by plugging, such as: in order to conveniently fix the plug-in component to the support column, the cross-section of the plug-in component is usually designed to be slightly smaller than the size of the support column to ensure that the plug-in component can be fixed to the inner wall of the support column by welding. Alternatively, the connection can be achieved by interference fit between the plug-in component and the support column. In the above connection form, since the size of the plug-in component is very close to the size of the support column, it is difficult to insert the plug-in component into the support column during the actual assembly process. Utility Model Content

[0003] In order to solve the above-mentioned problem, the purpose of the embodiments of the present application is to provide a connection structure and a building, which can conveniently and quickly realize the connection between the upper and lower support columns.

[0004] In a first aspect, an embodiment of the present application provides a connection structure, the connection structure comprising a first support column and a second support column connected in a height direction, and a plug-in assembly arranged at the connection point;

[0005] The plug-in assembly includes a connecting plate and a plug-in column, the connecting plate is provided with a plurality of fixing holes, the plug-in column passes through the fixing holes and is fixed to the connecting plate; the upper and lower surfaces of the connecting plate are respectively connected to the first support column and the second support column, the part of the plug-in column located on one side of the connecting plate extends into the first support column, and the part of the plug-in column located on the other side of the connecting plate extends into the second support column.

[0006] In an exemplary embodiment, both the first support column and the second support column are L-shaped support columns, and the connecting plate is configured as an L-shaped plate corresponding to the cross-sectional shape of the first support column and the second support column.

[0007] In an exemplary embodiment, the connecting plate comprises a connecting area, a first extending area and a second extending area, wherein the first extending area and the second extending area are respectively connected to the connecting area, so that the connecting plate is L-shaped;

[0008] The fixing hole is arranged on the first extension area, and / or the fixing hole is arranged on the second extension area, and / or the fixing hole is arranged on the connection area.

[0009] In an exemplary embodiment, the number of the plug-in posts is set to be multiple and the same as the number of the fixing holes; or, the number of the plug-in posts is set to be multiple and less than the number of the fixing holes; or, the number of the plug-in posts is set to be one.

[0010] In an exemplary embodiment, based on the fact that the number of the plug-in posts is set to be plural and less than the number of the fixing holes, a fixing hole without a plug-in post is provided between two adjacent plug-in posts.

[0011] In an exemplary embodiment, the number of fixing holes on the first extension area is two, the number of fixing holes on the second extension area is two, and the number of fixing holes on the connection area is one;

[0012] The number of the plug-in posts is three.

[0013] In an exemplary embodiment, along the length direction of the plug-in column, a plurality of connecting holes for concrete to pass through are arranged on the side wall of the plug-in column.

[0014] In an exemplary embodiment, based on the cross-section of the plug-in column being set as a rectangle:

[0015] The connecting holes are arranged on two opposite side walls of the plug-in column; or, the connecting holes are arranged on all four side walls of the plug-in column.

[0016] In an exemplary embodiment, the communicating hole is a circular hole, a waist-shaped hole, a rectangular hole or a trapezoidal hole.

[0017] In an exemplary embodiment, the fixing hole is a rectangular hole or a circular hole, and the cross section of the plug-in column is set to be a corresponding rectangle or circle.

[0018] In an exemplary embodiment, there is a clearance fit between the plug-in column and the fixing hole.

[0019] In an exemplary embodiment, the plug-in column is welded and fixed to the connecting plate; and / or a limiting portion is provided on the outer wall of the plug-in column, and when the plug-in column is fixed to the connecting plate, the limiting portion abuts against a portion of the connecting plate around the fixing hole to limit the plug-in column from falling off from the fixing hole.

[0020] In an exemplary embodiment, the upper and lower surfaces of the connecting plate are respectively welded and fixed to the first supporting column and the second supporting column.

[0021] In a second aspect, an embodiment of the present application further provides a building, comprising a plurality of prefabricated room modules connected vertically, wherein two adjacent prefabricated room modules are connected via the aforementioned connection structure.

[0022] This application has the following beneficial effects:

[0023] In the solution provided in the first aspect of the embodiment of the present application, a plug-in assembly is used at the connection between the first support column and the second support column for plug-in connection. By opening a hole (fixing hole) on the connecting plate and fixing the plug-in column, the size of the plug-in column can be appropriately reduced to avoid the situation where the plug-in column and the support column are close in size and difficult to insert, which effectively solves the problems of inconvenient installation, high manufacturing precision requirements, and high costs in the plug-in connection between the traditional plug-in components and the support column through interference fit. In addition, all of the multiple fixing holes can be used to install the plug-in column to improve the shear resistance of the connection between the first support column and the second support column, or some of the fixing holes can be left empty to allow concrete to flow from the upper support column to the lower support column, thereby improving the fluidity of the concrete at the connection and ensuring the connection strength of the first support column and the second support column.

[0024] In the solution provided in the second aspect of the embodiment of the present application, the building has the aforementioned connection structure. Adding the above-mentioned connection structure on the basis of the existing prefabricated room module connection can improve the shear resistance and connection strength of the prefabricated room modules during connection, and avoid cracks and breakages at the connection points of adjacent prefabricated room modules that affect the user's living safety and normal use; the connection between adjacent prefabricated room modules is reliable, the assembly efficiency is high, and the construction cost is low, which is conducive to the further promotion and application of buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0026] Figure 1 is a schematic diagram of a connection structure provided in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the structure of the plug-in assembly provided in the embodiment of the present application. Figure 1 ;

[0028] Figure 3 This is a schematic diagram of the structure of the plug-in assembly provided in the embodiment of the present application. Figure 2 ;

[0029] Figure 4 is a schematic diagram of the structure of the connection plate provided in an embodiment of the present application;

[0030] Figure 5 It is a schematic diagram of the structure of the plug-in column provided in the embodiment of the present application.

[0031] icon:

[0032] 1-first supporting column, 2-second supporting column, 3-plug-in assembly, 31-connecting plate, 311-first extension area, 312-second extension area, 313-connecting area, 314-fixing hole, 32-plug-in column, 321-connecting hole. DETAILED DESCRIPTION

[0033] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the description of the present application, it should be understood that the terms "vertical", "horizontal", "inside", "outside", "up", "down", "front", "back", "left", "right", "center", "longitudinal", "lateral", "length", "width", "thickness", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The present application embodiment provides a connection structure, such as Figures 1 to 5As shown, the connection structure includes a first support column 1 and a second support column 2 connected in the height direction, and a plug assembly 3 arranged at the connection; the plug assembly 3 includes a connecting plate 31 and a plug column 32, and a plurality of fixing holes 314 are opened on the connecting plate 31, and the plug column 32 passes through the fixing holes 314 and is fixed on the connecting plate 31; the upper and lower surfaces of the connecting plate 31 are respectively connected to the first support column 1 and the second support column 2, and the part of the plug column 32 located on one side of the connecting plate 31 extends into the first support column 1, and the part of the plug column 32 located on the other side of the connecting plate 31 extends into the second support column 2. The first support column 1 and the second support column 2 can both be steel columns.

[0038] Support columns are set at the corners of the prefabricated room modules. When two adjacent prefabricated room modules are assembled in the height direction, the support columns on the lower layer will be connected to the support columns on the upper layer. The following takes the first support column 1 as the upper support column and the second support column 2 as the lower support column as an example:

[0039] The first support column 1 and the second support column 2 are both hollow structures, which are convenient for pouring concrete inside.

[0040] The connecting plate 31 is provided with a plurality of fixing holes 314, and the plug-in column 32 passes through the fixing holes 314 and is fixed to the connecting plate 31. In other words, the plug-in column 32 is sleeved with the connecting plate 31 at the middle position in the length direction thereof. The part of the plug-in column 32 located above the connecting plate 31 extends upward into the bottom of the first support column 1, and the part of the plug-in column 32 located below the connecting plate 31 extends into the top of the second support column 2. The first support column 1 and the second support column 2 are not in direct contact, but are fixed through the connecting plate 31. In other words, the upper surface of the connecting plate 31 is connected and fixed to the bottom of the first support column 1, and the lower surface of the connecting plate 31 is connected and fixed to the top of the second support column 2.

[0041] The connection plate 31 is provided with holes (fixing holes 314) and the plug-in columns 32 are fixed thereon, so that the size of the plug-in columns 32 can be appropriately reduced to avoid the situation where the plug-in columns 32 and the support columns are close in size and difficult to insert, and the problems of inconvenient installation, high manufacturing precision requirements, and high costs in the traditional plug-in components plugged into the support columns through interference fit can be effectively solved. In addition, all of the multiple fixing holes 314 can be used to install the plug-in columns 32 to improve the shear resistance of the connection between the first support column 1 and the second support column 2, or some of the fixing holes 314 can be left vacant to allow concrete to flow from the upper support column to the lower support column, thereby improving the fluidity of the concrete at the connection and ensuring the connection strength of the first support column 1 and the second support column 2.

[0042] In an exemplary embodiment, if Figure 1 As shown, the first support column 1 and the second support column 2 are both L-shaped support columns, and the connecting plate 31 is configured as an L-shaped plate corresponding to the cross-sectional shapes of the first support column 1 and the second support column 2 .

[0043] The size of the L-shaped connecting plate 31 should be set to be the same as the cross-sectional size of the first support column 1 and the second support column 2 to ensure that when the connecting plate 31 is placed on the upper end of the second support column 2, the size of the connecting plate 31 will not be smaller than the inner wall size of the second support column 2 and fall into the second support column 2. At the same time, it also avoids the size of the connecting plate 31 being larger than the outer wall of the first support column 1 and the second support column 2, causing the connecting plate 31 to protrude too much.

[0044] Since the first support column 1 and the second support column 2 have a certain wall thickness (such as: 5mm), the size of the connecting plate 31 is allowed to have a certain error. In other words, in order to reduce the manufacturing accuracy requirements and costs of the connecting plate 31, the size of the connecting plate 31 can be slightly different from the cross-sectional dimensions of the first support column 1 and the second support column 2: when the size of the connecting plate 31 is slightly larger than the cross-sectional dimensions of the first support column 1 and the second support column 2, it is polished after the connection (welding) between the connecting plate 31 and the support column is completed; when the size of the connecting plate 31 is slightly smaller than the cross-sectional dimensions of the first support column 1 and the second support column 2, the missing part of the connecting plate 31 can be filled by welding when the connecting plate 31 and the support column are connected later.

[0045] In an exemplary embodiment, if Figure 4 As shown, the connecting plate 31 includes a connecting area 313, a first extension area 311 and a second extension area 312. The first extension area 311 and the second extension area 312 are respectively connected to the connecting area 313 so that the connecting plate 31 is L-shaped; a fixing hole 314 is provided on the first extension area 311, and / or a fixing hole 314 is provided on the second extension area 312, and / or a fixing hole 314 is provided on the connecting area 313.

[0046] The first extension area 311 and the second extension area 312 are respectively connected to the connection area 313, so that the connection plate 31 is L-shaped, that is, the extension direction of the first extension area 311 can be perpendicular to the extension direction of the second extension area 312. Fixing holes 314 can be provided on the connection area 313, the first extension area 311 and the second extension area 312 as needed to fix the plug-in column 32.

[0047] It should be understood that in actual operation, the connecting plate 31 can be a steel plate, that is, the connecting area 313, the first extension area 311 and the second extension area 312 are only various areas of the steel plate, such as Figure 4 As shown; alternatively, the connecting plate 31 may also be formed by splicing three separate steel plates, that is, the connecting area 313, the first extension area 311 and the second extension area 312 are independent steel plates respectively, and the three steel plates are welded to form a complete L-shaped steel plate.

[0048] In an exemplary embodiment, the number of the plug posts 32 is set to be multiple and the same as the number of the fixing holes 314; or, the number of the plug posts 32 is set to be multiple and less than the number of the fixing holes 314, such as Figure 2 and Figure 3 As shown; alternatively, the number of the plug-in posts 32 is set to one.

[0049] The number of the plug-in columns 32 can be set to be the same as the number of the fixing holes 314, that is, the plug-in columns 32 correspond to the fixing holes 314 one by one, and the plug-in columns 32 are fixed in all the fixing holes 314. At this time, since the plug-in columns 32 can be a hollow structure, concrete can still flow from the upper first support column 1 to the lower second support column 2 through the hollow plug-in columns 32.

[0050] The number of the plug-in columns 32 can be set to be multiple and less than the number of the fixing holes 314, that is, the number of the plug-in columns 32 and the fixing holes 314 is not one-to-one corresponding, and there is a situation where the plug-in columns 32 are not fixed in some of the fixing holes 314. At this time, the concrete can not only flow from the upper first support column 1 to the lower second support column 2 through the hollow plug-in columns 32, but also directly enter the lower second support column 2 through some of the fixing holes 314 on the connecting plate 31, thereby accelerating the flow rate of the concrete and ensuring that the concrete in the lower first support column 1 is poured densely.

[0051] Of course, the number of the plug-in posts 32 can also be directly set to one. When the number of the plug-in posts 32 is set to one, the plug-in posts 32 can be fixed in the fixing holes 314 of the connection area 313 .

[0052] In an exemplary embodiment, if Figure 2 As shown, based on the fact that the number of the plug-in posts 32 is set to be multiple and less than the number of the fixing holes 314 , a fixing hole 314 without a plug-in post 32 is provided between two adjacent plug-in posts 32 .

[0053] When the number of plug-in columns 32 is less than the number of fixing holes 314, that is, when some of the fixing holes 314 are not fixed with plug-in columns 32, the plug-in columns 32 can be arranged at intervals so that the remaining fixing holes 314 are also arranged at intervals, so that the concrete can flow evenly into the second support column 2 of the lower layer. At the same time, the plug-in columns 32 are distributed at intervals, which also improves the tensile and shear resistance of the connection between the first support column 1 and the second support column 2.

[0054] In a specific configuration, the number of fixing holes 314 on the first extension area 311 can be set to two, the number of fixing holes 314 on the second extension area 312 can be set to two, the number of fixing holes 314 on the connection area 313 can be set to one; the number of plug-in columns 32 is three. Of course, the number, distribution position, number of plug-in columns 32, etc. of the above-mentioned fixing holes 314 can be adjusted according to actual construction conditions and performance requirements such as strength and shear resistance, and this application does not limit this.

[0055] In an exemplary embodiment, if Figure 2 , Figure 3 and Figure 5 As shown, along the length direction of the plug-in column 32, a plurality of connecting holes 321 for concrete to pass through are arranged on the side wall of the plug-in column 32.

[0056] A connecting hole 321 is opened on the side wall of the plug-in column 32. After pouring concrete into the first support column 1 and the second support column 2, the concrete will fill the first support column 1 and the second support column 2. The concrete passing through the connecting hole 321 can improve the gripping force between the plug-in column 32 and the concrete, and increase the rigidity and strength of the first support column 1 and the second support column 2.

[0057] The specific distribution of the connecting holes 321 on the plug-in column 32 can be: when the cross section of the plug-in column 32 is set to be rectangular, the connecting holes 321 are set on the two opposite side walls of the plug-in column 32, that is, the two connecting holes 321 at the same height are set opposite to each other. Of course, the connecting holes 321 can also be set on all four side walls of the plug-in column 32, or the connecting holes 321 can be set on two adjacent side walls of the plug-in column 32.

[0058] The specific number of the communication holes 321 can be adjusted according to actual needs.

[0059] The communicating hole 321 is one or more of a circular hole, a waist-shaped hole, a rectangular hole or a trapezoidal hole.

[0060] In an exemplary embodiment, the fixing hole 314 is a rectangular hole or a circular hole, and the cross section of the plug-in column 32 is set to a corresponding rectangular or circular shape. Figures 1 to 4 The fixing hole 314 shown in FIG. 1 is a rectangular hole (square hole).

[0061] The cross-sectional shape of the plug-in post 32 corresponds to the fixing hole 314 , so that the plug-in post 32 is fixed in the fixing hole 314 .

[0062] When the fixing hole 314 is a circular hole, that is, the cross section of the plug column 32 is circular, the connecting holes 321 on the plug column 32 can be arranged in multiple rows along the circumference of the plug column 32. The same as when the cross section of the plug column 32 is rectangular, when the cross section of the plug column 32 is circular, the connecting holes 321 are arranged in multiple rows along the length direction of the plug column 32; the difference from when the cross section of the plug column 32 is rectangular is that when the cross section of the plug column 32 is rectangular, each side of the rectangle (that is, each side of the plug column 32) can be provided with the connecting holes 321, and when the cross section of the plug column 32 is circular, its side wall is a circumferential surface, and multiple rows of connecting holes 321 can be arranged along the circumferential surface.

[0063] In an exemplary embodiment, there is a clearance fit between the plug-in column 32 and the fixing hole 314 .

[0064] A clearance fit is set between the plug-in column 32 and the fixing hole 314 to facilitate the insertion of the plug-in column 32 into the fixing hole 314, and then the plug-in column 32 is pre-fixed by other means so that the position of the plug-in column 32 is fixed when concrete is poured into the first support column 1 and the second support column 2.

[0065] Of course, in some cases, a transition fit or an interference fit may be adopted between the plug-in column 32 and the fixing hole 314 , and the plug-in column 32 may be quickly inserted into the fixing hole 314 of the connecting plate 31 by knocking or the like.

[0066] In an exemplary embodiment, the plug-in column 32 is welded and fixed to the connecting plate 31; and / or, a limiting portion (not shown in the figure) is provided on the outer wall of the plug-in column 32. When the plug-in column 32 is fixed to the connecting plate 31, the limiting portion abuts against a portion of the connecting plate 31 on the periphery of the fixing hole 314 to limit the plug-in column 32 from falling off from the fixing hole 314.

[0067] After the plug-in column 32 is inserted into the fixing hole 314 of the connecting plate 31 , it can be fixed by welding.

[0068] In order to further reduce the on-site construction process, a limiting portion can be set on the outside of the plug-in column 32. When the plug-in column 32 is inserted into the fixing hole 314 of the connecting plate 31, the limiting portion presses against the connecting plate 31 to limit the plug-in column 32 from falling off from the fixing hole 314, thereby replacing the above-mentioned welding process.

[0069] Specifically, a protrusion may be formed on the outer wall surface of the plug-in column 32 or a screw may be installed to form a limiting portion, so that the plug-in column 32 is limited and fixed when it is installed in place in the fixing hole 314 .

[0070] In some cases, a steel bar can be directly fixed in the connecting hole 321 as a limiting part. The length of the steel bar is smaller than the side length (or diameter) of the first support column 1 or the second support column 2, and larger than the diameter of the fixing hole 314, so that the plug-in column 32 can be limited and fixed when it is installed in place in the fixing hole 314.

[0071] In an exemplary embodiment, the upper and lower surfaces of the connecting plate 31 are respectively welded and fixed to the first supporting column 1 and the second supporting column 2 .

[0072] After the connection plate 31 is welded to the first support column 1 and the second support column 2 respectively, not only the connection strength between the first support column 1 and the second support column 2 can be strengthened, but also the connection can be sealed to prevent concrete leakage from the connection.

[0073] In practical applications, a groove may be provided at the edge of the connecting plate 31 to facilitate welding with the first supporting column 1 and the second supporting column 2 .

[0074] The lengths a and b of the two long sides of the connecting plate 31 may be 250-350 mm, and the thickness may be 3-6 mm. The length of the plug-in column 32 may be 300-310 mm, the side length c may be 50-75 mm, and the wall thickness may be 2-4 mm.

[0075] An embodiment of the present application further provides a building, which includes a plurality of prefabricated room modules connected vertically, and two adjacent prefabricated room modules are connected via the aforementioned connection structure.

[0076] The building provided in the embodiment of the present application has the aforementioned connection structure. By adding the aforementioned connection structure on the basis of the existing prefabricated room module connection, the shear resistance and connection strength of the prefabricated room modules can be improved, and cracks and breakages can be avoided at the connection points of adjacent prefabricated room modules, which may affect the user's living safety and normal use. The connection between adjacent prefabricated room modules is reliable, the assembly efficiency is high, and the construction cost is low, which is conducive to the further promotion and application of the building.

[0077] It should be understood that the aforementioned steps are respectively descriptions of each connection position, rather than limiting the construction order. In actual applications, the concrete pouring step can be performed simultaneously at the connections of multiple adjacent prefabricated room modules to improve construction efficiency.

[0078] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0079] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A connection structure, characterized in that: It includes a first support column and a second support column connected in the height direction, and a plug-in assembly arranged at the connection point; The plug-in assembly includes a connecting plate and a plug-in column, the connecting plate is provided with a plurality of fixing holes, the plug-in column passes through the fixing holes and is fixed to the connecting plate; the upper and lower surfaces of the connecting plate are respectively connected to the first support column and the second support column, the part of the plug-in column located on one side of the connecting plate extends into the first support column, and the part of the plug-in column located on the other side of the connecting plate extends into the second support column.

2. The connection structure according to claim 1, characterized in that: The first support column and the second support column are both L-shaped support columns, and the connecting plate is configured as an L-shaped plate corresponding to the cross-sectional shape of the first support column and the second support column.

3. The connection structure according to claim 1, characterized in that: The connecting plate comprises a connecting area, a first extending area and a second extending area, wherein the first extending area and the second extending area are respectively connected to the connecting area, so that the connecting plate is L-shaped; The fixing hole is arranged on the first extension area, and / or the fixing hole is arranged on the second extension area, and / or the fixing hole is arranged on the connection area.

4. The connection structure according to claim 3, characterized in that: The number of the plug posts is set to be multiple and is the same as the number of the fixing holes; or The number of the plug posts is set to be plural and less than the number of the fixing holes; or The number of the plug-in posts is set to one.

5. The connection structure according to claim 4, characterized in that: Based on the fact that the number of the plug posts is set to be multiple and less than the number of the fixing holes, A fixing hole without a plug-in column is arranged between two adjacent plug-in columns.

6. The connection structure according to claim 5, characterized in that: The number of fixing holes on the first extension area is two, the number of fixing holes on the second extension area is two, and the number of fixing holes on the connection area is one; The number of the plug-in posts is three.

7. The connection structure according to any one of claims 1 to 6, characterized in that: Along the length direction of the plug-in column, a plurality of connecting holes for concrete to pass through are arranged on the side wall of the plug-in column.

8. The connection structure according to claim 7, characterized in that: Based on the cross-section of the plug-in column being set to a rectangle: The connecting holes are arranged on two opposite side walls of the plug-in column; or The four side walls of the plug-in column are all provided with the communicating holes.

9. The connection structure according to claim 7, characterized in that: The communicating hole is a circular hole, a waist-shaped hole, a rectangular hole or a trapezoidal hole.

10. The connection structure according to any one of claims 1 to 6, characterized in that: The fixing hole is a rectangular hole or a circular hole, and the cross section of the plug-in column is set to be a corresponding rectangle or circle.

11. The connection structure according to any one of claims 1 to 6, characterized in that: There is a clearance fit between the plug-in column and the fixing hole.

12. The connection structure according to any one of claims 1 to 6, characterized in that: The plug-in column is welded and fixed to the connecting plate; and / or A limiting portion is arranged on the outer side wall of the plug-in column. When the plug-in column is fixed to the connecting plate, the limiting portion abuts against a portion of the connecting plate at the periphery of the fixing hole to limit the plug-in column from falling off from the fixing hole.

13. The connection structure according to any one of claims 1 to 6, characterized in that: The upper and lower surfaces of the connecting plate are respectively welded and fixed to the first supporting column and the second supporting column.

14. A building, characterized in that: It comprises a plurality of prefabricated room modules connected vertically, wherein two adjacent prefabricated room modules are connected via a connecting structure as claimed in any one of claims 1 to 13.

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