Steel bar clamping device for connection of lightweight concrete wallboards

Abstract

The invention relates to the technical field of earth wood pile foundation steel bar connection, and particularly discloses a steel bar clamping device for lightweight concrete wallboard connection, which comprises an outer pipe, an inner pipe, a fixing device, a driving device and an inserting rod mechanism, the outer pipe is connected with an upper section of steel bar, the inner pipe is connected with a lower section of steel bar, and the inner pipe can slide in the outer pipe; when upper and lower wallboard embedded steel bars generate relative displacement, an insertion rod in an outer pipe is inserted into a sawtooth linkage block on a fixed rod and drives the sawtooth linkage block to slide, a first top plate, a second top plate and a fixed plate are sequentially pushed to move inwards, radial clamping of the wallboard embedded steel bars is achieved, a wavy force transmission interface is arranged between the fixed structures, the force transmission efficiency is improved, and the clamping effect is good. The device is provided with an elastic metal sheet buffering structure, has the functions of automatic clamping, buffering force limiting, self-resetting and the like, is compact in structure and stable in clamping, and is suitable for fabricated building scenes such as steel bar butt joint connection between lightweight concrete wallboards.

Description

Technical Field

[0001] The present invention relates to the technical field of lightweight building component connection, and particularly relates to a steel bar clamping device for the connection part of lightweight concrete wall panels. Background Art

[0002] Currently, during the construction process of prefabricated buildings, lightweight components such as autoclaved aerated concrete slabs (ALC), foam concrete slabs, and composite thermal insulation wall panels are widely used. Such walls are usually prefabricated in factories and assembled on-site to form an integral wall structure. To ensure the integrity and bearing capacity of the assembled walls, the components are often connected by inserting steel bars and supplemented by grouting reinforcement. However, traditional steel bar connection methods, such as straight thread steel bar sleeves or grouting anchoring, not only have complex installation and low construction efficiency, but also are prone to insecure connections or rework due to steel bar position deviations. In addition, the characteristics of lightweight wall panels are their low density and small self-weight, and their overall stiffness is not as good as that of traditional cast-in-place structures, which puts higher requirements on the stability of connection nodes. Especially at the joints of wall panels, if the steel bar connections are not secure, structural displacement, wall cracking, and even bearing failure are likely to occur. There is currently a lack of an automatic responsive steel bar clamping device specifically suitable for lightweight concrete wall panels that can directly drive the clamping structure through the relative displacement between components without relying on the tightening of sleeve threads or waiting for grouting to achieve rapid and stable connection. Summary of the Invention

[0003] The purpose of the present invention is to provide a steel bar clamping device for the connection of lightweight concrete wall panels to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A steel bar clamping device for the connection of lightweight concrete wall panels, comprising:

[0006] An outer tube 11, with variable diameter structures provided at both ends of the outer tube 11;

[0007] An inner tube 21, slidably disposed in the inner cavity of the outer tube 11;

[0008] A driving device 4, disposed between the outer tube 11 and the inner tube 21, for converting the axial relative displacement between the outer tube 11 and the inner tube 21 into a radial clamping action;

[0009] A plurality of placement grooves 22, opened on the outer wall of the inner tube 21 in a circular array and penetrating the inner wall of the inner tube 21 in the radial direction;

[0010] The fixing device 3 is installed in the placement groove 22 and includes a fixing plate 31 and a pushable member. The pushable member moves radially to push the fixing plate 31 inward to clamp the steel bar in the inner tube 21.

[0011] The driving device 4 includes:

[0012] A plurality of fixed rods 41 are distributed along the axial direction of the inner tube 21 and installed on its outer wall;

[0013] A plurality of serrated linkage blocks 42 are slidably arranged on the fixed rods 41 and are respectively connected to the pushable member. The serrated linkage block 42 has a serrated groove structure 43 for insertion;

[0014] A plurality of moving rods 44 are installed on the inner wall of the outer tube 11 in an annular array and are arranged staggered with the fixed rods 41;

[0015] The insertion rod 45 is rotatably connected to the moving rod 44 and is inserted into the tooth groove structure of the serrated linkage block 42 during the relative sliding of the outer tube 11 and the inner tube 21 to achieve action driving.

[0016] Preferably, the pushable member includes a first top plate 32 and a second top plate 33, which are stacked in sequence radially. The contact surfaces between the fixing plate 31 and the first top plate 32 are all wavy structures, and the contact surfaces between the first top plate 32 and the second top plate 33 are all wavy structures.

[0017] Preferably, the lengths of the first top plate 32 and the second top plate 33 are less than the length of the placement groove 22.

[0018] Preferably, before the device is driven, the fixing plate 31 and the first top plate 32, and the first top plate 32 and the second top plate 33 are closely attached through the wavy contact surfaces, and the wave crests of each correspond to the wave troughs of the adjacent components and are nested.

[0019] Preferably, the two serrated linkage blocks 42 on each fixed rod 41 are mirror-symmetrically distributed, and the two serrated linkage blocks 42 located on the same fixed rod 41 can only move away from each other.

[0020] Preferably, the free ends of the two groups of insertion rods 45 on the same side wall of the moving rod 44 extend towards the meshing side wall directions of the adjacent serrated linkage blocks 42 respectively.

[0021] Preferably, the meshing surface of the serrated groove structure 43 matches the rotation direction of the insertion rod 45.

[0022] Preferably, a non-rigid connection is adopted between the first top plate 32 and the second top plate 33 and the corresponding serrated linkage blocks 42.

[0023] Preferably, a slideway 5 is arranged on the outer wall of the inner tube 21 corresponding to the position of the moving rod 44.

[0024] Preferably, an elastic metal sheet is arranged on the side wall of the fixing plate 31 pointing to the inside of the inner tube 21.

[0025] A steel bar clamping device for connecting lightweight concrete wall panels proposed by the present invention has the beneficial effects that: the steel bar clamping device for connecting lightweight concrete wall panels provided by the present invention can automatically trigger the clamping action when the upper and lower steel bars have relative displacement, and utilizes the moving rod to drive the meshing cooperation of the insertion rod and the serrated linkage block to realize that the multi-stage top plate presses the fixing plate layer by layer along the radial direction, thereby significantly enhancing the clamping force of the steel bar connection part; through a variety of cooperative designs such as the wavy contact surface, elastic metal sheet, self-resetting hinged insertion rod, and slideway guiding structure in the device structure, it ensures stable connection action, efficient force transmission, and accurate positioning, and has the advantages of reliable clamping, sensitive response, and strong adaptability, and is suitable for the butt joint connection of steel bars in lightweight wall panel structures and the enhancement of structural seismic performance. Description of the Drawings

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

[0027] Figure 2 is a schematic structural diagram of the outer tube and the inner tube of the present invention;

[0028] Figure 3 is a first partial schematic diagram of the driving device of the present invention;

[0029] Figure 4 is a second partial schematic diagram of the driving device of the present invention;

[0030] Figure 5 is a schematic diagram of the fixing device of the present invention;

[0031] Figure 6 is a schematic diagram of the serrated linkage block of the present invention.

[0032] In the figure: 11, outer tube; 12, small-diameter section; 21, inner tube; 22, placement groove; 3, fixing device; 31, fixing plate; 32, first top plate; 33, second top plate; 4, driving device; 41, fixed rod; 42, serrated linkage block; 43, serrated groove structure; 44, moving rod; 45, insertion rod; 5, slideway. Detailed Embodiments

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 - 6 , the present invention provides a technical solution for a steel bar clamping device for connecting lightweight concrete wall panels. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and the specific work is as follows:

[0035] A steel bar clamping device for connecting lightweight concrete wall panels, comprising: an outer tube 11, an inner tube 21, a plurality of placement grooves 22, and a fixing device 3.

[0036] Both ends of the outer tube 11 have a stepped diameter structure. The inner diameter of the inner cavity of the outer tube 11 is larger than the outer diameter of the inner tube 21, and an annular cavity is formed therebetween to accommodate the components of the driving device 4 and ensure its normal operation. Both ends of the outer tube 11 are provided with a stepped diameter structure. One end is a three-stage stepped diameter structure, which successively includes: a large diameter section, a stepped diameter section, and a small diameter section 12. The inner diameter of the small diameter section 12 matches the outer diameter of the embedded steel bars in the wall panel, and is used to fit and connect with the outer wall of the steel bars to realize the structural connection between the device and the embedded steel bars in the upper wall panel. The other end is a two-stage stepped diameter structure, which successively includes: a large diameter section and a stepped diameter section. The inner diameter of its end is slightly larger than the outer diameter of the inner tube 21, and it is only used to guide and limit the axial sliding of the inner tube and does not fit and connect with the embedded steel bars in the wall panel. One end of the outer tube 11 is used to connect the embedded steel bars in the upper wall panel. The small diameter section 12 at this end matches the outer diameter of the embedded steel bars in the upper wall panel, so as to be firmly connected to the upper steel bars by tight fitting or welding, realizing the reliable butt joint connection of the embedded steel bars in the wall panel, and improving the anti-pulling force and anti-sliding ability of the connection part of the pile foundation steel bars. The inner tube 21 is slidably arranged in the inner cavity of the outer tube 11, and its outer diameter is smaller than the inner diameter of the outer tube 11, so as to form an annular cavity for the arrangement of the driving device 4 and the sliding of the components therebetween. One end of the inner tube 21 is used to connect the embedded steel bars in the lower wall panel, and can be connected by welding, thread fitting or plugging mechanism, so that the device can realize the high-strength butt joint with the embedded steel bars in the upper and lower wall panels during the hoisting or construction of the lightweight wall panel or precast wall, ensuring the continuity of force. A number of placement grooves 22 are evenly opened on the annular outer wall of the inner tube 21 in an annular array. The placement grooves 22 are through structures, extending from the outer wall of the inner tube 21 to the inner wall and completely penetrating along the radial direction of the inner tube 21, so that the placement grooves 22 can directly contact the steel bars in the tube to form a clamping channel. The placement grooves 22 are used to accommodate multi-stage fixing components to realize radial clamping or limiting of the embedded steel bars in the wall panel. The fixing device 3 is installed in the placement grooves 22 and is used to effectively restrain and clamp the steel bars in multiple circumferential directions. The fixing device 3 can move along the radial direction of the inner tube 21 when receiving an external drive through a stepped pressing structure, so as to generate a gradually increasing radial clamping force on the embedded steel bars in the wall panel, and improve the anti-pulling force and anti-sliding ability of the connection part of the pile foundation steel bars.

[0037] The fixing device 3 includes: a fixing plate 31 slidably arranged in the placement groove 22, and its side facing the center of the inner tube 21 is a working surface, which contacts the outer wall of the embedded steel bars of the wall panel under a force state to play a clamping and fixing role; a propulsible component arranged on the outside of the fixing plate 31, which is used to transmit the clamping force to the fixing plate under a driven state. The pushable component includes a first top plate 32 and a second top plate 33, which are radially stacked in sequence: the fixed plate 31 is slidably arranged in the mounting groove 22, and is arranged as a slidable structure along the radial direction of the inner tube 21, and its contact surface facing the center side of the inner tube 21 is in contact with the outer wall of the pre-embedded steel bars of the wall panel. Under stress, the fixed plate 31 can move toward the direction of the pre-embedded steel bars of the wall panel under the push of the first top plate 32 or the second top plate 33 to achieve primary clamping. The fixed plate 31 maintains the overall structural stability during the clamping process, and its sliding path is limited by the groove wall of the mounting groove 22 to prevent excessive advancement or disengagement. The first top plate 32 is movably installed on the side wall of the fixed plate 31 facing the outer side of the inner tube 21, and it can slide relative to the fixed plate 31, and the contact interface between it and the fixed plate 31 It is set to a wavy structure, which is a non-planar contact surface with multiple crests and troughs. When the first top plate 32 or the second top plate 33 is pushed radially, the fixed plate 31 can be pushed radially inward through the crest-trough misalignment engagement, thereby playing a role in flexible force transmission. The second top plate 33 is movably installed on the side wall of the first top plate 32 facing the outside of the inner tube 21, and a wavy contact interface is also set between the second top plate 33 and the first top plate 32, so that it can independently generate a radial force on the first top plate 32 when driven externally, forming a step-by-step force transmission structure. During the operation of the fixing device 3, the first top plate 32 and the second top plate 33 are alternately driven, and form a structural closed loop with the fixed plate 31 respectively, to ensure that the fixed plate 31 can achieve the clamping effect on the steel bars under any unilateral drive.

[0038] The driving device 4 includes: a plurality of fixed rods 41 , a sawtooth linkage block 42 , a plurality of movable rods 44 and a plurality of insertion rods 45 .

[0039] A number of fixed rods 41 are evenly installed on the outer wall of the inner tube 21 in an annular array. The fixed rods 41 are distributed circumferentially and extend axially. The fixed rods 41 are straight guiding members, and their two ends are fixedly connected to the outer wall of the inner tube 21. During use, they are used to guide the serrated linkage block 42 in a sliding manner, ensuring that the linkage block can only slide in the axial direction and avoiding structural offset or failure. The serrated linkage block 42 is arranged to slide unidirectionally on the fixed rod 41 and is used to generate axial slippage in response to the meshing action of the insertion rod 45, and further push the connected first top plate 32 and second top plate 33, thereby realizing the radial clamping by pushing the fixed plate 31. Two serrated linkage blocks 42 are provided on each fixed rod 41, located at the upper and lower parts of the fixed rod 41 respectively, and are axially symmetrically arranged. In terms of structural features, they are mirror-designed, that is, the tooth grooves face each other and the inclination directions are opposite, and they can be meshed with the insertion rods from above or below respectively. On both sides of each serrated linkage block 42, there are serrated tooth grooves that cooperate with the insertion rod 45. The rotation direction of the insertion rod 45 is matched with the opening inclination direction of the tooth groove, so that the insertion rod 45 can be inserted along the guiding inclined plane of the tooth groove during rotation, realizing the direction selectivity and meshing stability of the insertion action. Among them, the two serrated linkage blocks 42 on the same fixed rod 41 are respectively connected to the first top plate 32 and the second top plate 33, and are independent of each other in structure and their actions do not interfere with each other. When the upper serrated linkage block 42 is driven to slide under the meshing of the insertion rod 45, only the connected first top plate 32 generates a radial displacement, while the second top plate 33 and the fixed plate 31 remain stationary. The first top plate 32 uses the force transmission principle of the wave crest pushing the wave trough through the wave structure arranged between it and the fixed plate 31 to make the fixed plate 31 generate displacement and complete the clamping action. On the contrary, when the lower serrated linkage block 42 is driven to slide, the second top plate 33 acts, and the first top plate 32 and the fixed plate 31 are stationary. The clamping force is generated through the wave structure between the second top plate 33 and the fixed plate 31, realizing the same clamping effect. Thus, without the need to drive both ends simultaneously, the stability and reliability of the clamping action are always ensured. The moving rods 44 are arranged on the inner wall of the outer tube 11, and the number is staggered and arranged at intervals with the fixed rods 41. A number of moving rods 44 are installed in an annular array, and their axial directions are the same as those of the inner tube 21. The moving rods 44 have a certain length in structure. When the inner tube 21 and the outer tube 11 have relative axial slippage, they move together with the outer tube 11. On the outer wall of each moving rod 44, there are a plurality of mounting hinge seats for the insertion rod 45 to realize the movable connection of the insertion rod 45. The hinge structure has a resilient characteristic, enabling the insertion rod 45 to swing around the hinge point at a controllable angle while axially slipping. This structure cooperates with the relative displacement behavior of the outer tube 11 and the inner tube 21 to trigger the meshing action of the insertion rod 45 during the sliding process. The insertion rod 45 is the key linkage component for realizing the meshing with the serrated linkage block 42 and is used to control the action trigger of the serrated linkage block 42 during the slippage of the outer tube 11. The insertion rods 45 are divided into four groups, and the four groups of insertion rods 45 are evenly installed on the outer walls of the respective moving rods 44 in a symmetrical structure.The free end of the insertion rod 45 extends towards the meshing area between the fixed rods 41. During the sliding process, the insertion rod 45 can actively enter the sawtooth grooves on both sides of the sawtooth linkage block 42 to achieve insertion, and only form a meshing action when the structural directions match. The four groups of insertion rods 45 are arranged centrosymmetrically with respect to the axis of the moving rod 44. When the inner and outer tubes 11 move relative to each other, the insertion rod 45 at the front end of the sliding direction will automatically insert into the meshing tooth groove of the corresponding sawtooth linkage block 42, while the insertion rod 45 at the rear end of the sliding direction will disengage from the sawteeth due to the mismatch of the structural directions, realizing the dynamic linkage behavior of one end inserting and the other end releasing, thereby achieving unidirectional transmission. Each insertion rod 45 realizes the self-resetting function through an elastic recovery mechanism or a torsion spring hinge. When the external force is removed or the sliding stops, it can automatically rebound to the original position to prepare the structural starting state for the next action, ensuring that the plugging and unplugging cycle is controllable and reusable.

[0040] The lengths of the first top plate 32 and the second top plate 33 are both smaller than the length of the corresponding placement groove 22, so that the top plate has sufficient moving stroke during the driven sliding process, avoiding movement blockage or insufficient clamping stroke caused by being limited by the length of the placement groove 22. At the same time, a certain buffer interval is reserved in the non-operating state to improve the installation alignment accuracy of the top plate and the fitting effect of the wave structure.

[0041] The contact surface between the fixed plate 31 and the first top plate 32 is a wave-like structure, and the contact surface between the first top plate 32 and the second top plate 33 is also a wave-like structure. Each group of wave-like structures includes a plurality of wave peaks and wave valleys distributed axially. Adjacent components are in fitting contact in the way of wave peak to wave valley and wave valley to wave peak. During the force application process, the axial thrust can be gradually converted into radial clamping force through the contact displacement, improving the force conduction efficiency and enhancing the overall clamping stability of the device.

[0042] In the state where the device is not driven, the wave-like contact surfaces between the fixed plate 31 and the first top plate 32, and between the first top plate 32 and the second top plate 33 are in a tightly fitting state. Their respective wave peaks are correspondingly fitted into the wave valleys of adjacent components, forming an initially stable interlocking structure. This fitting relationship can effectively prevent the components from loosening or misaligning during transportation or hoisting, and at the same time provide a stable starting position for the subsequent clamping action.

[0043] The two sawtooth linkage blocks 42 provided on each fixed rod 41 are mirror-symmetrically distributed in the axial direction and are respectively located on the vertical bisector of the fixed rod 41. The two sawtooth linkage blocks 42 can only slide in the opposite direction, and their structures do not interfere with each other and their functions are independent. They respectively drive the first top plate 32 or the second top plate 33 to move, forming a double-channel clamping mechanism that can be independently controlled.

[0044] The free ends of two groups of insertion rods 45 located on the same side wall of the same moving rod 44 extend respectively towards the meshing side walls of two adjacent sawtooth linkage blocks 42. The insertion rods 45 are matched with the tooth groove angles of the sawtooth linkage blocks 42 in terms of structural direction, and the insertion direction has directional control to ensure that during the sliding process of the outer tube 11, the insertion rods 45 can only complete the insertion action in the set direction, preventing reverse misinsertion or interference jamming.

[0045] The rotation direction of each insertion rod 45 is consistent with the meshing direction of the sawtooth structure on the side wall of its corresponding sawtooth linkage block 42, that is, the sawtooth inclined surface coincides with the rotation path direction of the insertion rod 45. Thus, during the insertion process, the insertion rod 45 can smoothly slide into the tooth groove to form an engagement, and automatically disengage due to angle mismatch during reverse sliding, realizing the direction selectivity of the insertion and extraction actions.

[0046] The first top plate 32 and the second top plate 33 are respectively connected to the corresponding sawtooth linkage blocks 42 by a non-rigid connection method. The non-rigid connection method is a chute guiding connection, an elastic bayonet connection or an inclined plane pin structure, which is used to adapt to the direction inconsistency between the axial sliding of the sawtooth linkage block 42 and the radial movement of the top plate, ensure controllable thrust conversion and stable structural buffering, and at the same time avoid structural damage or jamming. The non-rigid connection between the first top plate 32 or the second top plate 33 and the corresponding sawtooth linkage block 42 is realized through a support column insertion guiding structure. A support column extending in the radial direction is arranged on the sawtooth linkage block 42, and the outer diameter of the support column is D; a round hole is opened at the corresponding position on the inner side of the first top plate 32 or the second top plate 33, and the hole diameter is slightly larger than D, forming an insertion relationship with clearance fit. When driving the sawtooth linkage block 42 to slide axially, the support column can generate a small slip in the hole and drive the top plate to displace. This insertion structure retains an appropriate degree of freedom while transmitting the driving force.

[0047] On the outer wall of the inner tube 21, at the position corresponding to each moving rod 44, a slideway 5 is provided. The slideway 5 is a U-shaped or groove structure extending along the axial direction of the inner tube 21, and cooperates with the slide rail structure provided at the bottom of the moving rod 44 to form a sliding guiding mechanism, which is used to limit the offset angle and swing trajectory of the moving rod 44 during the sliding process, improve the alignment accuracy and structural response speed of the insertion action between the insertion rod 45 and the sawtooth linkage block 42. An elastic metal sheet is provided on the surface of the fixing plate 31 pointing to the inner side of the inner tube 21. The metal sheet can generate an auxiliary pressing force or a buffering force during the movement of the fixing plate 31, which is used to provide an additional pressing extension amount at the end of the clamping action, compensate for the contact instability caused by insufficient top plate stroke, meshing error of the insertion rod 45 or steel bar position deviation, enhance the overall clamping performance and adaptive ability, and at the same time is used to generate flexible deformation during the gradual increase of the clamping force, absorb the impact load during the transmission process and release the reaction energy, avoiding component deformation, steel bar damage or structural failure of the connection mechanism caused by rigid pressing.

[0048] Working principle:

[0049] A steel bar clamping device for connecting lightweight concrete wall panels provided by the present invention mainly consists of an outer tube 11, an inner tube 21, a fixing device 3 (including a fixing plate 31, a first top plate 32, and a second top plate 33), and a driving device 4 (a fixed rod 41, a serrated linkage block 42, a moving rod 44, and a plug rod 45). The device is connected to the embedded steel bars of the upper wall panel and the lower wall panel respectively through the coaxial sliding connection mode of the outer tube 11 and the inner tube 21 to form an integral structure. The transmission and clamping system arranged inside it automatically responds and gradually increases the clamping force when the upper and lower steel bars have relative displacement, so as to realize the stable connection between the steel bars and the improvement of the structural uplift resistance. During the use process, if axial displacement occurs between the embedded steel bars of the upper and lower wall panels due to reasons such as concrete pouring, construction settlement, and structural load transfer, the outer tube 11 and the inner tube 21 will immediately have relative sliding. During the sliding process of the outer tube 11, it drives the moving rods 44 arranged at equal intervals on its inner wall to move axially. Four groups of plug rods 45 are arranged on the outer wall of the moving rod 44 in a centrosymmetric manner. The plug rods 45 are connected to the moving rod 44 through a self-resetting hinge structure. When the sliding direction is consistent with the swinging direction of the plug rod 45, the free end of the plug rod 45 rotates inward and inserts into the serrated groove of the serrated linkage block 42 on the fixed rod 41 to form a structural engagement. The engagement direction of the plug rod 45 matches the serration inclination direction one by one, ensuring that the plug rod 45 can only complete the insertion when the sliding direction is correct, which has a one-way selective control effect. Two serrated linkage blocks 42 are arranged on each fixed rod 41 and are mirror-symmetrically distributed, connecting the first top plate 32 and the second top plate 33 respectively. When the plug rod 45 inserts into the upper serrated linkage block 42 and drives it to slide axially, only the first top plate 32 connected to this serrated linkage block 42 is driven to advance radially, and the second top plate 33 and the fixing plate 31 remain stationary. The wavy contact surface between this top plate and the fixing plate 31 realizes force conduction by the wave crest pushing the wave trough, thereby pushing the fixing plate 31 towards the surface of the steel bar to generate a clamping force. When sliding in the reverse direction, the other plug rod 45 inserts into the lower serrated linkage block 42 to drive the second top plate 33 to act, and also pushes the fixing plate 31 to clamp the embedded steel bar of the wall panel through the wave structure between it and the fixing plate 31. This double-top plate - fixing plate 31 structure can be alternately driven to continuously enhance the clamping strength during multiple responses, forming a linkage structure of "staggered propulsion and layer-by-layer clamping". During the sliding process of the fixing plate 31, the end surface facing the inner cavity of the inner tube 21 contacts the surface of the embedded steel bar of the wall panel and gradually compresses to realize the radial limit fixation of the steel bar. In order to prevent damage caused by rigid compression, an elastic metal sheet structure is arranged between the inner side of the fixing plate 31 and the steel bar, which can deform and absorb energy at the end stage of clamping to provide a buffering effect. This metal sheet can not only improve the clamping fit degree but also prevent the steel bar from deforming or the clamping structure from being fatigued. A slideway 5 structure is arranged on the outer wall of the inner tube 21 corresponding to the arrangement position of the moving rod 44 and is used in cooperation with the bottom slider of the moving rod 44 to ensure that the running track of the 44 during axial sliding is controlled and the plug rod 45 is accurately inserted, avoiding action failure or meshing error caused by deviation. After each sliding response of the device,The insertion rod 45 disengages from the sawtooth linkage block 42 by relying on the self - reset function at the hinge and returns to the initial position, completing a clamping cycle. This device can be automatically triggered by multiple minor relative slips between the embedded steel bars of the upper and lower wall panels, continuously generating clamping force, and has good self - adaptability and repeated response ability. The whole device has a compact structure, accurate action, and reliable clamping, and has the characteristics of passive response, no external energy source, anti - eccentricity, and anti - fatigue, and is suitable for connection scenarios of precast components such as prefabricated lightweight concrete wall panels and composite partition wall panels.,

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel bar clamping device for connecting lightweight concrete wall panels, characterized in that, Comprising: An outer tube (11), with diameter-changing structures provided at both ends of the outer tube (11); An inner tube (21), slidably disposed in the inner cavity of the outer tube (11); A driving device (4), disposed between the outer tube (11) and the inner tube (21), for converting the axial relative displacement between the outer tube (11) and the inner tube (21) into a radial clamping action; A plurality of placement grooves (22), formed on the outer wall of the inner tube (21) in an annular array and penetrating the inner wall of the inner tube (21) radially; A fixing device (3), installed in the placement groove (22), including a fixing plate (31) and a pushable member, the pushable member moving radially to push the fixing plate (31) to clamp the steel bar in the inner tube (21) inward; The driving device (4) includes: A plurality of fixed rods (41), distributed along the axial direction of the inner tube (21) and installed on its outer wall; A plurality of serrated linkage blocks (42), slidably disposed on the fixed rods (41) and respectively connected to the pushable member, the serrated linkage blocks (42) having a serrated groove structure (43) for insertion; A plurality of moving rods (44), installed on the inner wall of the outer tube (11) in an annular array and arranged staggeredly with the fixed rods (41); An insertion rod (45), rotatably connected to the moving rod (44), and inserted into the tooth groove structure of the serrated linkage block (42) during the sliding of the outer tube (11) relative to the inner tube (21) to achieve action driving.

2. The steel bar clamping device for connecting lightweight concrete wall panels according to claim 1, characterized in that, The pushable member includes a first top plate (32) and a second top plate (33), which are stacked layer by layer radially in sequence, the contact surfaces between the fixing plate (31) and the first top plate (32) are all wavy structures, and the contact surfaces between the first top plate (32) and the second top plate (33) are all wavy structures.

3. The steel bar clamping device for connecting lightweight concrete wall panels according to claim 2, characterized in that: The lengths of the first top plate (32) and the second top plate (33) are less than the length of the placement groove (22).

4. A steel bar clamping device for connecting lightweight concrete wall panels according to claim 3, characterized in that: Before the device is driven, the fixing plate (31) is in close contact with the first top plate (32), and the first top plate (32) is in close contact with the second top plate (33) through the wavy contact surfaces, and the wave peaks of each are nested corresponding to the wave valleys of the adjacent members.

5. The steel bar clamping device for connecting lightweight concrete wall panels according to claim 1, characterized in that: The two serrated linkage blocks (42) on each fixed rod (41) are mirror-image distributed, and the two serrated linkage blocks (42) located on the same fixed rod (41) can only move away from each other.

6. The steel bar clamping device for connecting lightweight concrete wall panels according to claim 1, characterized in that: The free ends of the two groups of insertion rods (45) on the same side wall of the moving rod (44) extend respectively towards the meshing side wall directions of the adjacent serrated linkage blocks (42).

7. A steel bar clamping device for connecting lightweight concrete wall panels according to claim 1, characterized in that: The meshing surface of the serrated groove structure (43) matches the rotation direction of the insertion rod (45).

8. The steel bar clamping device for connecting lightweight concrete wall panels according to claim 2, wherein: The first top plate (32) and the second top plate (33) are non-rigidly connected to the corresponding serrated linkage blocks (42).

9. A steel bar clamping device for connecting lightweight concrete wall panels according to claim 1, characterized in that: A slideway (5) is provided at the position of the outer wall of the inner tube (21) corresponding to the moving rod (44).

10. A steel bar clamping device for connecting lightweight concrete wall panels according to claim 1, characterized in that: An elastic metal sheet is provided on the side wall of the fixing plate (31) pointing to the inside of the inner tube (21).

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