Connecting structure and modular building connecting joint

Abstract

The utility model provides a connecting structure and a modular building connecting node, and the connecting structure comprises a connecting piece which comprises a connecting plate and plugs symmetrically fixed on the upper surface and the lower surface of the connecting plate; the sleeve sleeves the peripheral side of the plug; the self-locking head comprises a plurality of fasteners movably arranged between the sleeve and the plug, the plurality of fasteners enclose to form an insertion cavity for the plug to be inserted, and the elastic piece is arranged between the inner side wall of the sleeve and the fasteners; first meshing structures matched with each other are arranged between the fastener and the inner side wall of the sleeve, and second meshing structures matched with each other are arranged between the fastener and the plug. According to the connecting structure, self-locking type connection can be achieved through the gravity of the components, the site construction difficulty is greatly reduced, and the whole site construction process is dry type operation; meanwhile, due to the arrangement of the elastic pieces, the upper module and the lower module can move in a staggered mode under the acting force in the horizontal direction, and flexible connection between the modules is formed.

Description

Technical Field

[0001] The present application belongs to the field of construction engineering technology, and more specifically, relates to a connection structure and a modular building connection node. Background Art

[0002] Modular concrete structure is the latest research achievement in the field of prefabricated concrete structure. However, the existing connection method is difficult to meet the design requirements of traditional strong nodes and weak components, or it is impossible to completely avoid wet operations on site, which fully reflects the superiority of modular buildings. The existing connection methods are basically all for modular steel structure buildings, which are difficult to apply to prefabricated concrete structures. At present, the connection nodes between columns in precast concrete frames mainly adopt end plate bolt connection, steel connection sleeve grouting connection and on-site post-casting. Connection methods such as steel connection sleeve grouting connection and on-site post-casting are mostly wet connections, that is, the longitudinal reinforcement of each component of the beam and column is first connected by slurry anchor or mechanical connection in the node area, and then the concrete is cast in place. The operation is cumbersome, the construction is difficult, and the cost is high. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a connection structure and a modular building connection node that can avoid on-site wet operations and have convenient construction and low cost.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a connection structure, including:

[0005] A connector, comprising a connecting plate and plugs symmetrically fixed on the upper and lower surfaces of the connecting plate;

[0006] A sleeve, which is sleeved on the outer side of the plug, wherein the two axial ends of the sleeve are a closed end and an open end respectively, and the open end of the sleeve abuts against the connecting plate;

[0007] A self-locking head and an elastic member, wherein the self-locking head comprises four fasteners movably arranged between the sleeve and the plug, the four fasteners enclose a plug-in cavity for inserting the plug, and the elastic member is arranged between the inner side wall of the sleeve and the fasteners;

[0008] Among them, a first bite structure that cooperates with each other is provided between the fastener and the inner side wall of the sleeve, and a second bite structure that cooperates with each other is provided between the fastener and the plug. When the plug is inserted into the plug-in cavity, the elastic member is in a compressed state, and the elastic force provided by the elastic member enables the plug to be bite-locked with each of the fasteners through the second bite structure, and enables the fastener to be bite-locked with the sleeve through the first bite structure; the first bite structure limits the movement of the fastener in the sleeve in the horizontal direction.

[0009] In one embodiment, a plurality of first grooves are laterally opened on the side wall of the fastener facing away from the plug, and the plurality of first grooves are vertically spaced apart. A protrusion adapted to the first groove is provided at a position of the sleeve corresponding to the first groove. The first groove and the protrusion form the first engaging structure, and when the plug is inserted into the plug-in cavity, the protrusion at least partially extends into the first groove.

[0010] In one embodiment, a plurality of second grooves are provided on the side wall of the fastener facing the plug, and the plurality of second grooves are vertically spaced apart. A convex plate adapted to the second grooves is provided on the circumferential side of the plug, and the convex plate and the second grooves form the second engaging structure. When the plug is inserted into the plug-in cavity, the convex plate at least partially extends into the second groove.

[0011] In one embodiment, the longitudinal section of the protruding plate is a right triangle, the longer right-angled side of the protruding plate is connected to the plug, and the width of the longitudinal section of the protruding plate gradually decreases from close to the connecting plate to away from the connecting plate.

[0012] In one embodiment, the width of the protruding plate is equal to the width of the corresponding side of the plug.

[0013] In one embodiment, the cross-section of the fastener at a position where the second groove is not provided is an isosceles trapezoid, the side of the fastener with a smaller width is arranged facing the plug, and the angle between the bottom edge and the hypotenuse of the fastener is set to 45 degrees.

[0014] In one embodiment, the elastic member includes a plurality of springs arranged between each of the fasteners and the sleeve, and the fasteners and / or the sleeve are provided with connecting ears for the springs to be sleeved and fixed.

[0015] A modular building connection node comprises a plurality of module columns, a plurality of module beams and the above connection structure, wherein the sleeve is anchored to the module column, or is anchored to the inside of the module column and the module beam at the same time.

[0016] In one embodiment, the module columns and the module beams are both made of steel, or the module columns and the module beams are both made of concrete.

[0017] The beneficial effect of the connection structure provided by the present application is that: compared with the prior art, the connection structure of the present application, by arranging a self-locking head and an elastic part in the sleeve, and a first bite structure is provided between the fastener of the self-locking head and the sleeve, and a second bite structure is provided between the fastener and the plug. When the plug is inserted into the plug-in cavity surrounded by multiple fasteners, the elastic force of the elastic part causes the plug and the fastener, and the fastener and the sleeve to bite and lock, and the self-locking connection can be achieved by the self-gravity of the components. The installation operation is simple, which greatly reduces the difficulty of on-site construction. The entire on-site construction process is dry operation, saving material and time costs. At the same time, the setting of the elastic part allows the upper and lower modules to be displaced under the action of horizontal forces, and forms a flexible connection between the modules, which can achieve a certain degree of energy consumption and shock absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A three-dimensional diagram of a connection structure provided in one embodiment of the present application;

[0020] Figure 2 for Figure 1 An exploded view of the connection structure shown;

[0021] Figure 3 for Figure 1 A longitudinal sectional view of the connection structure shown;

[0022] Figure 4 for Figure 2 A three-dimensional view of the self-locking head in the connection structure shown;

[0023] Figure 5 for Figure 4 A three-dimensional view of the fastener in the self-locking head shown;

[0024] Figure 6 for Figure 5 A three-dimensional view of the fastener from another angle;

[0025] Figure 7 for Figure 6 a side view of the fastener shown;

[0026] Figure 8 for Figure 2 A three-dimensional view of a connecting member in the connecting structure shown;

[0027] Fig. 9 for Figure 8a side view of the illustrated connector;

[0028] Fig.10 for Figure 8 A longitudinal sectional view of the connecting member shown;

[0029] Fig.11 for Figure 1 Installation diagram of the connection structure shown Figure 1 ;

[0030] Fig.12 for Figure 1 Installation diagram of the connection structure shown Figure 2 ;

[0031] Fig.13 for Figure 1 Installation diagram of the connection structure shown Figure 3 ;

[0032] Fig.14 for Figure 1 Installation diagram of the connection structure shown Figure 4 ;

[0033] Fig.15 A three-dimensional diagram of a modular building connection node provided in one embodiment of the present application;

[0034] Fig.16 for Fig.15 An exploded schematic diagram of the modular building connection nodes shown;

[0035] Fig.17 for Fig.15 A longitudinal section view of a modular building connection node is shown.

[0036] Among them, the reference numerals in the figure are:

[0037] 100-connecting piece; 110-connecting plate; 120-plug; 121-convex plate; 200-sleeve; 210-bump; 220-connecting ear; 300-self-locking head; 310-fastener; 311-first groove; 312-second groove; 313-plug-in cavity; 400-elastic piece; 410-spring; 50-upper module; 51-upper module column; 52-upper module beam; 53-anchoring steel; 60-lower module; 61-lower module column; 62-lower module beam. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", 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.

[0041] 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.

[0042] Please also read Figures 1 to 3 , the connection structure provided by the embodiment of the present application is now described. The connection structure is applied to the modular building connection node, and the connection structure includes a connector 100, a sleeve 200, a self-locking head 300 and an elastic member 400. The connector 100, the sleeve 200 and the self-locking head 300 can all be made of steel. The size of the cross section of the sleeve 200 is equal to the size of the cross section of the module column. The connector 100 includes a connecting plate 110 and a plug 120 arranged on the upper and lower surfaces of the connecting plate 110, and the plugs 120 on the upper and lower sides of the connecting plate 110 are symmetrically arranged. The two axial ends of the sleeve 200 are a closed end and an open end, respectively, and the sleeve 200 is sleeved on the outer side of the plug 120, that is, there is a sleeve 200 on the upper and lower sides of the connecting plate 110. The closed end of the sleeve 200 can be used to fix with the module column, and the open end of the sleeve 200 is against the horizontal end surface of the corresponding side of the connecting plate 110.

[0043] The self-locking head 300 includes a plurality of fasteners 310 movably arranged between the sleeve 200 and the plug 120. The plurality of fasteners 310 surround an insertion cavity 313 for the plug 120 to be inserted into, and the elastic member 400 is sandwiched between the inner wall of the sleeve 200 and the fasteners 310. A first bite structure for use in conjunction with the fastener 310 and the inner wall of the sleeve 200 is provided, and a second bite structure for use in conjunction with the fastener 310 and the plug 120 is provided. The second bite structure enables the plug 120 to bite with the fastener 310 after being inserted into the insertion cavity 313, that is, to achieve locking and fixing between the plug 120 and the self-locking head 300. When the plug 120 is inserted into the plug cavity 313, the elastic member 400 is in a compressed state, and the elastic force of the elastic member 400 causes the plug 120 to engage with and lock the fasteners 310, and the first engaging structure causes the fasteners 310 to engage with and lock the sleeve 200, thereby achieving relative fixation between the plug 120 and the sleeve 200. In other words, the arrangement of the elastic member 400 and the engaging structures enables the connection between the components to form a self-locking connection, which will not loosen or fall off after self-locking, and can be connected by the weight of the components themselves. The installation operation is simple, and the self-locking connection greatly reduces the difficulty of on-site construction. The entire on-site construction process is dry operation, saving material and time costs. Since an elastic member 400 is provided between the fastener 310 and the sleeve 200, the upper and lower modules 60 can have a certain degree of displacement under the action of horizontal force, thus forming a flexible connection between the modules, which can achieve a certain degree of energy dissipation and shock absorption. The connection structure can be applied to prefabricated concrete column connections, steel structure column connections, and modular steel structure connections, and has good versatility and wide applicability.

[0044] Specifically, Figure 2 , Figure 3 As shown, four fasteners 310 are arranged in a sleeve 200, and each fastener 310 has the same size. The middle of the four fasteners 310 forms a plug-in cavity 313 for the plug 120 to be plugged in. During installation, the plug 120 on one side of the connector 100 is aligned with the plug-in cavity 313 formed by the fasteners 310 in the sleeve 200 on the lower module column 61, and the plug 120 is inserted into the plug-in cavity 313 until it abuts against the inner bottom wall of the sleeve 200. The fasteners 310 spread out in all directions in the sleeve 200, and the elastic member 400 is squeezed between the fastener 310 and the sleeve 200. In this way, through the elastic force of the elastic member 400, the plug 120 is engaged and locked with each fastener 310, and each fastener 310 is locked with the sleeve 200, so as to achieve a self-locking connection. The elastic force provided by the first bite structure, the second bite structure and the elastic member 400 prevents the plug 120 and the self-locking head 300, as well as the self-locking head 300 and the sleeve 200 from loosening or falling off, thereby achieving a flexible connection, i.e., a self-locking flexible connection. The on-site construction process is dry operation, which reduces labor, material and time costs.

[0045] Compared with the prior art, the connection structure provided by the present application is different from that of the prior art in that a self-locking head 300 and an elastic member 400 are arranged in the sleeve 200, and a first bite structure is arranged between the fastener 310 of the self-locking head 300 and the sleeve 200, and a second bite structure is arranged between the fastener 310 and the plug 120. When the plug 120 is inserted into the plug-in cavity 313 surrounded by a plurality of fasteners 310, the elastic force of the elastic member 400 causes the plug 120 and the fastener 310, as well as the fastener 310 and the sleeve 200 to bite and lock, thereby making the fastener 310 and the sleeve 200 relatively fixed. The self-locking connection can be achieved by the self-weight of the components, and the installation operation is simple, which greatly reduces the difficulty of on-site construction. The entire on-site construction process is dry operation, saving material and time costs. At the same time, the setting of the elastic member 400 allows the upper and lower modules 60 to shift under the action of horizontal forces, and form a flexible connection between the modules, which can achieve a certain degree of energy consumption and shock absorption.

[0046] Preferably, the first bite structure can limit the movement of the fastener 310 in the sleeve 200 in the horizontal direction, that is, the fastener 310 can only move in the horizontal direction and cannot move in the longitudinal direction, so that after the plug 120 is inserted into the plug cavity 313, the fasteners 310 around the plug 120 move outward in the horizontal direction. When the plug 120 is inserted into the plug cavity 313 surrounded by multiple fasteners 310, the plug 120 is engaged with the fasteners 310 in the sleeve 200 through the second bite structure, and the fastener 310 and the sleeve 200 cannot move in the longitudinal direction through the first bite structure, thereby achieving locking and fixing between the fastener 310 and the sleeve 200. The upper and lower modules 60 can have a certain degree of displacement under the action of the horizontal force, which not only forms a flexible connection between the modules, but also reduces the installation accuracy requirements.

[0047] See also Figures 5 to 7 The side wall of the fastener 310 facing away from the plug 120 is laterally provided with a first groove 311, and the position of the sleeve 200 corresponding to the first groove 311 is provided with a protrusion 210 adapted to the first groove 311. The first groove 311 and the protrusion 210 form a first bite structure. Preferably, the fastener 310 is provided with a plurality of first grooves 311, and the plurality of first grooves 311 are arranged vertically at intervals. It can be understood that other concave-convex structures for use in conjunction can also be provided between the fastener 310 and the sleeve 200, and these concave-convex structures form the first bite structure. During installation, the fastener 310 is placed in the sleeve 200, with the side having the first groove 311 facing the inner wall of the sleeve 200 on the corresponding side. When the plug 120 is not inserted into the plug-in cavity 313, the first groove 311 of the fastener 310 corresponds to the position of the protrusion 210 on the inner wall on the corresponding side of the sleeve 200. When the plug 120 is inserted into the plug-in cavity 313, at least a portion of the protrusion 210 extends into the first groove 311.

[0048] See also Figure 7 , Figures 8 to 10 , a second groove 312 is provided on the side wall of the fastener 310 facing the plug 120, and a convex plate 121 adapted to the second groove 312 is provided on the circumferential side of the plug 120. Preferably, the fastener is provided with a plurality of second grooves 312, and a plurality of first grooves 312 are arranged vertically at intervals. The convex plate 121 and the second groove 312 form a second bite structure. Since the first groove 311 is arranged horizontally, the protrusion 210 can limit the movement path of the fastener 310, that is, it can only move in the horizontal direction. Under the action of vertical tension, the protrusion 210, the fastener 310 and the convex plate 121 jointly bear the shear force, and the plug 120 plays a positioning role in the module installation process, as well as a horizontal shear resistance between the modules 60 under large displacement conditions. The width of the convex plate 121 can be set to be equal to the width of the plug 120, so that the bite between the plug 120 and the self-locking head 300 is more stable. As Figure 7 , Fig.10 As shown, each side surface of the plug 120 is provided with three convex plates 121 engaging with the fastener 310 at intervals in the longitudinal direction, and the fastener 310 is correspondingly provided with three matching second grooves 312 .

[0049] When the plug 120 is inserted into the insertion cavity 313, the fasteners 310 in the sleeve 200 are held by the plug 120 and spread out to the surroundings, and at least a portion of the convex plate 121 of the plug 120 extends into the second groove 312. In this way, under the elastic force of the elastic member 400, the plug 120 is engaged and locked with the circumferential fasteners 310, and each fastener 310 is engaged and locked with the convex block 210 on the inner wall of the sleeve 200, thereby making the plug 120 and the sleeve 200 relatively fixed.

[0050] See also Figure 3 , Fig.11 Preferably, the elastic member 400 is a plurality of springs 410 disposed between the fastener 310 and the sleeve 200, and the fastener 310 and / or the sleeve 200 are provided with connecting ears 220 for the springs 410 to be sleeved and fixed. In one embodiment, the inner wall of the sleeve 200 and the fastener 310 are both provided with connecting ears 220 adapted to the springs 410, and the two ends of the spring 410 are respectively sleeved and fixed on the connecting ears 220 on the corresponding sides. It can be understood that the elastic member 400 can also be other elastic components. Figure 3 , Fig.10 As shown, two second grooves 312 are formed on the side wall of the fastener 310 , and three springs 410 are arranged between the single fastener 310 and the sleeve 200 in the longitudinal direction. The three springs 410 are arranged in a straight line.

[0051] In this embodiment, the inner wall of the sleeve 200 and the fastener 310 are both provided with a connecting ear 220 adapted to the spring 410. Figure 12 to Figure 14During the specific installation, one end of each spring 410 is sleeved and fixed on the connecting ear 220 of the inner wall of the sleeve 200, and the four fasteners 310 are placed in the sleeve 200, and the connecting ear 220 of the fastener 310 is aligned with the other end of the spring 410. In this way, the four fasteners 310 are sleeved and fixed together. After the four fasteners 310 are placed, the four fasteners 310 form a plug-in cavity 313 for the plug 120 to be inserted. Then, the plug 120 under the connector 100 is aligned with the plug-in cavity 313, and the plug 120 is inserted. When the plug 120 is inserted, the plug 120 pushes against the fasteners 310 on all sides, and the fasteners 310 move outward at the same time. At this time, the spring 410 is in a compressed state, so that the elastic force of the spring 410 makes the fasteners 310 and the plug 120, the fasteners 310 and the protrusion 210 of the sleeve 200 press against each other, and makes the plug 120 and the self-locking head 300 bite and lock, and the fasteners 310 and the sleeve 200 bite and lock, so that the self-locking flexible connection of the components is realized, and the operation is convenient.

[0052] Preferably, see Figure 7 , Fig. 9 , Fig.10 , the longitudinal section of the convex plate 121 on the plug 120 is a right triangle. The right-angled side of the convex plate 121 is connected to the plug 120, and preferably, the longer right-angled side of the convex plate 121 is connected to the plug 120. The width of the longitudinal section of the convex plate 121 gradually decreases from the direction close to the connecting plate 110 to the direction away from the connecting plate 110. The size and shape of the second groove 312 on the fastener 310 are adapted to the size and shape of the convex plate 121, so that the inclined surface of the convex plate 121 can be used as a guide surface, on the one hand, it makes it easier to insert the plug 120 into the plug cavity 313, and on the other hand, the plug 120 and the fastener 310 can be locked together more stably, that is, the convex plate 121 on the plug 120 forms a barb-like structure to fasten the fastener 310, so that the plug 120 will not fall out of the plug cavity 313 after the fastener 310 is engaged. Preferably, the width of the protruding plate 121 is set to be equal to the width of the corresponding side of the plug 120 . When the cross section of the plug 120 is a square, the width of the protruding plate 121 is equal to the width of the plug 120 .

[0053] Specifically, the plug 120 and the convex plate 121 are integrally formed, that is, the plug 120 and the convex plate 121 can be made by casting. It can be understood that the convex plate 121 can also be fixed to the plug 120 by welding.

[0054] See also Figure 6 , Fig.11 and Fig.14The cross section of the fastener 310 at the position where the second groove 312 is not provided is an isosceles trapezoid, the side of the fastener 310 with a smaller width faces the plug 120, and the side of the fastener 310 with a larger width faces the inner wall of the corresponding side of the sleeve 200. With this isosceles trapezoidal fastener 310, after placing four fasteners 310 in the sleeve 200, the hypotenuses between two adjacent fasteners 310 abut against each other, so that a rectangular plug-in cavity 313 is formed in the middle of the four fasteners 310, and each fastener 310 can be formed into a cavity for plugging in the adapter plug 120 without adjusting the position of the fastener 310, which can further save time and cost and reduce the difficulty of installation. Preferably, in the isosceles trapezoidal fastener 310, the angle between the hypotenuse and the bottom edge is set to 45 degrees, so that adjacent fasteners 310 will not interfere with each other when moving horizontally in the sleeve 200.

[0055] See also Figure 8 , Fig.17 Preferably, the size of the cross section of the connecting plate 110 is equal to the size of the cross section of the sleeve 200, and the size of the cross section of the sleeve 200 is less than or equal to the size of the cross section of the module column. When the size of the cross section of the sleeve 200 is equal to the size of the cross section of the module column, the connecting plate 110 and the module column form a structure with consistent outer dimensions, and the connecting plate 110 does not protrude beyond the module column, which not only has a stable structure but also has an overall beautiful appearance.

[0056] See also Fig.15 , Fig.16 The modular building connection node provided in the embodiment of the present application includes multiple module columns, multiple module beams and the connection structure recorded in the above embodiment, and the sleeve 200 is anchored to the module column, or is anchored inside the module column and the module beam at the same time.

[0057] The modular columns and modular beams can both be made of steel, or both the modular columns and modular beams can be made of concrete structural members. In other words, the connection structure provided in the embodiment of the present application is applicable to assembled concrete column connection, steel structure column connection, and modular steel structure connection, and has wide applicability.

[0058] Combined with reference Figures 15 to 17 , the module column and the module beam are both concrete structural members, the upper module column 51 and the upper module beam 52 are connected at a right angle, the upper module column 51 and the upper module beam 52 form an upper module 50, the lower module column 61 and the lower module beam 62 are connected at a right angle, the lower module column 61 and the lower module beam 62 form a lower module 60. The following describes the installation method of the concrete module building connection node:

[0059] 1. In the prefabrication stage of the factory, the anchor steel 53 is first welded to the sleeve 200, and then the anchor steel 53 is cast in the module column. When the cross-sectional size of the sleeve 200 is smaller than the cross-sectional size of the module column, the sleeve 200 and the anchor steel 53 need to be completely embedded in the module column and cast. In order to enhance the anchoring strength, studs can be welded on the anchor steel 53. When the cross-sectional size of the sleeve 200 is equal to the cross-sectional size of the module column, the anchor steel 53 is also welded on the side wall of one side of the sleeve 200, and the anchor steel 53 on this side is cast in the module beam, so as to form a plurality of separate modules, that is, a plurality of upper modules 50 and lower modules 60 in an L-shaped structure.

[0060] 2. The self-locking head 300 and the spring 410 are placed in each sleeve 200, and both ends of the spring 410 are respectively fixed on the connecting ears.

[0061] 3. Place the lower module column 61 vertically, and then align the plug 120 below the connector 100 with the plug-in cavity 313 in the upper sleeve 200 of the lower module 60, and insert the plug 120 below to complete the self-locking.

[0062] 4. Sleeve the sleeve 200 at the bottom of the upper module 50 onto the plug 120 above the connector 100 to complete the self-locking of the upper plug 120, thus completing the fixed connection between the upper module 50 and the lower module 60. The connection and fixation of the concrete module nodes are self-locking flexible connections, and all are dry operations. After each node is completed, a modular structural system of the concrete structure can be formed.

[0063] It can be understood that in the connector 100, the number of plugs 120 on the upper and lower surfaces of the connecting plate 110 can be increased according to actual application requirements, such as two plugs 120 are respectively provided on the upper and lower surfaces of the connecting plate 110, or four plugs 120 are respectively provided on the upper and lower surfaces of the connecting plate 110. Correspondingly, the sleeve 200, the self-locking head 300 and the spring 410 are also increased accordingly, which can be applicable to the corresponding modular system.

[0064] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A connection structure, characterized in that: include: A connector, comprising a connecting plate and plugs symmetrically fixed on the upper and lower surfaces of the connecting plate; A sleeve, which is sleeved on the outer side of the plug, wherein the two axial ends of the sleeve are a closed end and an open end respectively, and the open end of the sleeve abuts against the connecting plate; A self-locking head and an elastic member, wherein the self-locking head comprises four fasteners movably arranged between the sleeve and the plug, the four fasteners enclose a plug-in cavity for inserting the plug, and the elastic member is arranged between the inner side wall of the sleeve and the fasteners; Among them, a first bite structure that cooperates with each other is provided between the fastener and the inner side wall of the sleeve, and a second bite structure that cooperates with each other is provided between the fastener and the plug. When the plug is inserted into the plug-in cavity, the elastic member is in a compressed state, and the elastic force provided by the elastic member enables the plug to be bite-locked with each of the fasteners through the second bite structure, and enables the fastener to be bite-locked with the sleeve through the first bite structure; the first bite structure limits the movement of the fastener in the sleeve in the horizontal direction.

2. The connection structure according to claim 1, characterized in that: A plurality of first grooves are laterally formed on the side wall of the fastener facing away from the plug, and the plurality of first grooves are vertically spaced apart. A protrusion adapted to the first groove is provided at a position of the sleeve corresponding to the first groove. The first groove and the protrusion form the first engaging structure. When the plug is inserted into the plug-in cavity, the protrusion at least partially extends into the first groove.

3. The connection structure according to claim 1, characterized in that: The side wall of the fastener facing the plug is provided with a plurality of second grooves, and the plurality of second grooves are vertically spaced apart. A convex plate adapted to the second grooves is provided on the circumferential side of the plug. The convex plate and the second grooves form the second engaging structure. When the plug is inserted into the plug-in cavity, the convex plate at least partially extends into the second groove.

4. The connection structure according to claim 3, characterized in that: The longitudinal section of the protruding plate is a right triangle, the longer right-angled side of the protruding plate is connected to the plug, and the width of the longitudinal section of the protruding plate gradually decreases from close to the connecting plate to away from the connecting plate.

5. The connection structure according to claim 3, characterized in that: The width of the protruding plate is equal to the width of the corresponding side of the plug.

6. The connection structure according to claim 3, characterized in that: The cross section of the fastener at the position where the second groove is not set is an isosceles trapezoid, the side of the fastener with a smaller width is arranged facing the plug, and the angle between the bottom edge and the hypotenuse of the fastener is set to 45 degrees.

7. The connection structure according to claim 1, characterized in that: The elastic member comprises a plurality of springs arranged between each of the fasteners and the sleeve, and the fasteners and / or the sleeve are provided with connecting ears for the springs to be sleeved and fixed.

8. A modular building connection node, characterized in that: It comprises a plurality of module columns, a plurality of module beams and the connection structure according to any one of claims 1 to 7, wherein the sleeve is anchored to the module column, or is anchored to the inside of the module column and the module beam at the same time.

9. The modular building connection node according to claim 8, characterized in that: The module columns and the module beams are both made of steel, or the module columns and the module beams are both concrete structural members.

Images