Grouting-free self-rotating type reinforcing steel bar sleeve connecting device for vertical prefabricated part

Abstract

The invention discloses a grouting-free self-rotating type reinforcing steel bar sleeve connecting device for vertical prefabricated parts, and relates to the technical field of reinforcing steel bar connection in building structures. The upper sleeve and the lower sleeve are embedded in an upper prefabricated part and a lower prefabricated part and connected with longitudinal main ribs of the upper prefabricated part and the lower prefabricated part, the quick connecting mechanism automatically rotates under pressure and can connect the upper sleeve and the lower sleeve at the same time, and the upper sleeve comprises an upper threaded sleeve and an inner threaded sleeve. The lower sleeve comprises a lower inner thread sleeve and an outer thread sleeve, and the quick connecting mechanism comprises an inner thread sleeve, an outer thread sleeve and an inner guide pipe from outside to inside. Compared with an existing grouting sleeve, the connecting device is completely made of steel and belongs to mechanical connection, the sleeve is short and is not affected by other factors such as the environment, the failure possibility is avoided, and special equipment is not needed during site construction on a construction site.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel bar connection in building structure, and particularly relates to a self-spinning steel bar sleeve connection device for vertical prefabricated component without grouting. BACKGROUND

[0002] Fabricated building is a low-carbon, environment-friendly and energy-saving building which is vigorously promoted at present, and the steel bar connection technology in the vertical prefabricated component (such as frame column and shear wall) of the fabricated building is a key technology for determining the safety and reliability of the structure. The steel bar sleeve grouting connection technology is used in most of the country, that is, a ribbed steel bar is inserted into a metal sleeve and grouting material is injected into the sleeve, and the steel bar butt joint connection is formed by the hardening of the grouting material.

[0003] The steel bar sleeve grouting connection technology has the following shortcomings: A. The steel bar sleeve grouting connection technology is composed of three materials, namely sleeve, grouting material and steel bar, and does not belong to mechanical connection. Compared with mechanical connection, the sleeve is relatively long.

[0004] B. In the technology, the force transmission relies on the adhesion and friction between the grouting material and the sleeve (steel bar), and there is a possibility of connection failure if the grouting material is not full or the quality of the grouting material is poor.

[0005] C. In the technology, special pressure grouting equipment is needed to grout the grouting material into the sleeve, and without the special equipment, the construction cannot be carried out.

[0006] D. In the technology, after the grouting is completed, the strength of the test piece under the same conditions needs to reach 35MPa (generally 24 hours) before the next process construction can be carried out, and the construction cannot be continued if the hardening strength of the grouting material does not reach.

[0007] E. In the technology, the reliability of the connection is greatly affected by the construction operation level and temperature and humidity, and the construction quality detection requirement is high.

[0008] F. In the implementation of the technology, wet operation construction such as site mixing, grouting and bottom sealing of the grouting material is needed, and the environmental friendliness is not high.

[0009] In view of the problems of the prior art, a "one-click" type steel bar connection technology which is fast, efficient, green, safe, reliable and convenient to construct is sought. SUMMARY

[0010] The technical scheme of the present application provides a solution significantly different from the prior art, and provides a self-spinning steel bar sleeve connection device for vertical prefabricated component without grouting, so as to solve the technical problem that the connection is complex due to the lack of a suitable connection method in the existing steel bar connection.

[0011] A vertical prefabricated component non-grouting self-rotation steel sleeve connecting device, comprising an upper sleeve (with internal threads at both upper and lower ends) embedded in an upper prefabricated component and connected with longitudinal main reinforcement thereof, a lower sleeve (steel connecting piece, with internal threads at lower end and external threads at upper end) embedded in a lower prefabricated component and connected with longitudinal main reinforcement thereof, and a quick connecting mechanism (steel casting, with internal and external threads) for automatic rotation under pressure to simultaneously connect the upper and lower sleeves.

[0012] During construction, first, the upper and lower sleeves are screwed on the longitudinal main reinforcement threads of the upper and lower prefabricated components by using a manual wrench and other small tools in the factory, and the position of the reinforcement is fixed after pouring concrete, and after curing, the prefabricated components are transported to the construction site. After the lower prefabricated component is hoisted and positioned, the quick connecting mechanism is placed on the upper end of the lower sleeve, then the upper prefabricated component is hoisted and positioned, and the upper and lower sleeves are aligned, the clamping grooves correspond, and the structure component is slowly pressed by its own gravity, at this time the quick connecting mechanism automatically rotates, the internal threads of the quick connecting mechanism engage with the external threads of the upper end of the lower sleeve, and the external threads of the quick connecting mechanism engage with the internal threads of the upper sleeve, and the upper sleeve, the lower sleeve and the quick connecting mechanism are automatically screwed.

[0013] The entire construction process, from a distance, is to hoist the prefabricated component, then align and position it, and then slowly lower it to the bottom, and the automatic connection of the prefabricated component reinforcement is completed.

[0014] Specifically, the upper sleeve of the device comprises an upper threaded sleeve and an internal threaded sleeve pipe, and the reinforcement is screwed between the threaded structure at the end thereof and the upper threaded sleeve. The lower sleeve 3 comprises a lower internal threaded sleeve 32 and an external threaded sleeve pipe 31, and is screwed with the threaded structure at the end of the reinforcement embedded in the lower prefabricated component.

[0015] At this time, the diameters of the upper sleeve and the lower sleeve are not limited, and in use, the size of the upper sleeve and the lower sleeve is adjusted adaptively according to the size of the threads of the reinforcement to be connected.

[0016] Further, the quick connecting mechanism comprises an internal and external threaded sleeve and an internal guide pipe from outside to inside, the internal and external threaded sleeve is provided with threaded structures on the outer surface and the inner surface respectively, which cooperate with the internal threaded sleeve pipe and the external threaded sleeve pipe, and the internal and external threaded sleeve is provided with an elastic block at the bottom. The pitch of the threaded structure is not particularly limited, and in use, at this time, in order to ensure the smoothness of the screw, the pitch and the inclined angle of the thread can be appropriately increased to ensure effective connection between the threads.

[0017] Further, the inner adjusting assembly comprises an inner guide pipe, the inner guide pipe is sequentially provided with an upper sleeve block, a first cavity and a second cavity from top to bottom, the first cavity and the second cavity are distinguished by a transverse partition plate, the upper sleeve block is hollow, a hydraulic bag is arranged in the first cavity, and a flow-through gap is arranged in the hydraulic bag, the upper sleeve block and the hydraulic bag are connected through a connecting pipe, an annular groove is arranged on the upper sleeve block, a guide pipe is arranged in the second cavity, the guide pipe is connected with the flow-through gap, and the second cavity is filled with a water-swelling material.

[0018] Further, a plurality of permeation holes are arranged on the guide pipe for liquid outflow, and a gap is arranged between the bottom of the guide pipe and the bottom of the inner guide pipe.

[0019] Further, the diameter of the connecting pipe is much smaller than the diameter of the hydraulic bag, and the hydraulic bag is made of an extruded deformable material.

[0020] Further, the inner and outer threaded sleeves are connected with the upper sleeve block through an annular connecting block, a rotating ring is arranged on the annular connecting ring, the rotating ring is arranged at the gap between the upper sleeve blocks, the rotating ring is rotationally connected with the upper sleeve blocks, and a plurality of turbine blades are arranged on the rotating ring.

[0021] Compared with the prior art, the beneficial effects of the present application are as follows: 1. The connecting device of the present application is entirely made of steel materials and is connected through threads, which belongs to mechanical connection, and the sleeve is relatively short.

[0022] 2. The force transmission in the connecting device of the present application relies on the biting action between the connecting parts or the threads and the pressure bearing action of the steel end face, and is not affected by other factors, and there is no possibility of failure.

[0023] 3. In the present application, the steel bar connection only needs the small tools commonly used by steel workers in the factory, and can be installed by hand at the construction site without the need for special equipment, which is more convenient.

[0024] 4. In the present application, the steel bar connection construction can immediately proceed to the next process construction without waiting.

[0025] 5. In the present application, the connection is reliable, and can be observed by the naked eye as long as it is rotated in place, and subsequent quality detection is not needed.

[0026] 6. In the present application, there is no wet operation construction, the assembly efficiency is high, and the construction is green and environmentally friendly. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the specific embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0028] Figure 1 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 2 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 3 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 4 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 5 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 6 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 7 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 6 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 8 The schematic diagram of the complete set of devices and prefabricated components of the present application; Figure 9 The schematic diagram of the complete set of devices and prefabricated components of the present application; The schematic diagram of the complete set of devices and prefabricated components of the present application; The schematic diagram of the complete set of devices and prefabricated components of the present application; Specific embodiments

[0029] The technical solutions of the present application will be described in detail below with reference to the drawings, obviously, the described embodiments are some of the embodiments of the present application, and not all the embodiments.

[0030] The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0031] All other embodiments obtained by those of ordinary skill in the art without creative work based on the embodiments of the present application fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] The embodiments of the present application provide a vertical prefabricated component non-grouting self-spinning steel sleeve connecting device, which is shown in the drawings. Figures 1 to 9 The embodiments of the present application provide a vertical prefabricated component non-grouting self-spinning steel sleeve connecting device, which is shown in the drawings. The upper sleeve 1 includes an upper threaded sleeve 11, an inner threaded sleeve 12, and a plug rod 13 arranged in the inner threaded sleeve 12. The steel bar is threadedly locked between the upper threaded sleeve 11 and the threaded structure at the end thereof by turning threads on the end thereof.

[0035] Specifically, the quick connecting mechanism 2 includes an inner and outer threaded sleeve 22 and an inner guide pipe 211 from the outside to the inside. The outer surface and the inner surface of the inner and outer threaded sleeve 22 are respectively provided with threaded structures matched with the inner threaded sleeve 12 and the outer threaded sleeve 31. The bottom of the inner and outer threaded sleeve 22 is provided with an elastic block 221, which can play a role of buffering and circumferential positioning. When working, there is a gap between the inner and outer threaded sleeve 22 and the inner guide pipe 211, and the lower sleeve 3 is located in the gap between the inner and outer threaded sleeve 22 and the guide pipe, and the upper sleeve 1 is engaged with the outer thread of the inner and outer threaded sleeve 22.

[0036] Specifically, the inner adjusting assembly 21 comprises an inner guide pipe 211, and the inner guide pipe 211 is sequentially provided with an upper sleeve block 216, a first cavity and a second cavity 214 from top to bottom, the first cavity and the second cavity 214 are distinguished by a transverse partition plate, the upper sleeve block 216 is hollow, a hydraulic bag 212 is arranged in the first cavity, and a flow-through gap 2121 is arranged in the hydraulic bag 212, the upper sleeve block 216 and the hydraulic bag 212 are connected through a connecting pipe 215, an annular groove 2161 is arranged on the upper sleeve block 216, a guide pipe 213 is arranged in the second cavity 214, the guide pipe 213 is connected with the flow-through gap 2121, and the second cavity 214 is filled with a water-swelling material, a through hole is arranged at the bottom of the upper sleeve block 216 for draining liquid, at this time, the water-swelling material is preferably a material that can provide a large thrust after swelling, such as superabsorbent resin, so that the water-swelling material can also be extruded during the process of extruding the hydraulic bag 212 by the insertion rod 13, and the liquid in the hydraulic bag 212 can be extruded into the upper sleeve block 216 to make the turbine blade 223 inside rotate, and at the same time, in order to ensure rotation, the connecting pipe 215 and the upper sleeve block 216 are inclinedly connected to improve the lateral impact force.

[0037] When working, by arranging the inner adjusting assembly 21, the upper precast component is slowly lowered after being lifted, and the upper sleeve 1 is pressed downward under the action of gravity, so that the quick connecting mechanism 2 can rotate, and the upper sleeve 1 and the lower sleeve 3 are connected through the rotation, at this time, it needs to be explained that during the operation, the rotation direction of the inner and outer threaded sleeve 22 is in one direction, and the inner and outer threaded sleeve 22 needs to be respectively engaged with the upper sleeve 1 and the lower sleeve 3, therefore, during the design of the upper sleeve 1 and the lower sleeve 3, the direction of the thread needs to be considered, so that the upper sleeve 1 and the lower sleeve 3 can be connected with the inner and outer threaded sleeve 22, the thread pitch and the thread inclination angle need to be considered to determine the size of the downward pressure caused by the self-weight of the component, and the selection of the internal thread needs to ensure that it can rotate under the action of the downward pressure instead of being stuck.

[0038] Specifically, a plurality of permeation holes for liquid outflow are arranged on the guide pipe 213, and a gap is formed between the bottom of the guide pipe 213 and the bottom of the inner guide pipe 211.

[0039] In use, the water extruded can be delivered into the second cavity 214 by the guide pipe 213, and since the guide pipe 213 is provided with water seepage holes throughout, the uniformity of water seepage is improved, and the expansion material has better expansion effect. Meanwhile, the expanded material can seal the residual space of the inner guide pipe 211, and with time increasing, the material will become hard, avoiding the inner guide pipe 211 having through holes and reducing the strength. The length of the inner guide pipe 211 is greater than the length of the insertion rod 13.

[0040] Specifically, the diameter of the connecting pipe 215 is much smaller than the diameter of the hydraulic bag 212, and the hydraulic bag 212 is made of extruded deformable material.

[0041] Through the change of the diameter difference, when the water is discharged into the upper sleeve block 216 through the connecting pipe 215 and acts on the turbine blade 223, a greater impact force can be provided, so that the turbine blade 223 rotates.

[0042] Specifically, the inner and outer threaded sleeve 22 and the upper sleeve block 216 are connected through the annular connecting block 224, the annular connecting block 224 is provided with a rotating ring 222, the rotating ring 222 is located at the gap between the upper sleeve block 216, and the rotating ring 222 and the upper sleeve block 216 are rotatably connected, and the rotating ring 222 is provided with a plurality of turbine blades 223.

[0043] The rotating ring 222 can connect a plurality of turbine blades 223, so that one turbine blade 223 rotates and the others also rotate, and the central connecting rod is cancelled, and the annular connecting block 224 is provided with a central hole for the insertion rod 13 to enter and abut against the hydraulic bag 212.

[0044] Construction sequence: during construction, first, the upper threaded sleeve 11 of the upper sleeve 1 and the lower inner threaded sleeve 32 of the lower sleeve 3 are respectively sleeved on the upper and lower longitudinal main reinforcement threads of the prefabricated member and are tightened, and the steel bar position is fixed after pouring concrete, and the prefabricated member is transported to the construction site after curing. In the construction site, the lower prefabricated member is hoisted and positioned in alignment; Then, the inner and outer threaded sleeve 22 and the inner guide pipe 211 are placed on the outer threaded sleeve pipe 31 and are preliminarily tightened; Subsequently, the upper layer prefabricated component with the upper sleeve 1 is moved to the lower layer prefabricated component, the upper sleeve 1 and the lower sleeve 3 in the upper layer prefabricated component and the lower layer prefabricated component are positionally corresponding, then the hoisting rope of the upper layer prefabricated component is slowly released step by step, at this time, the inner guide pipe 211 is pressed under the action of the self weight of the upper layer prefabricated component, at this time, the plug rod 13 will abut against the hydraulic bag 212, the hydraulic bag 212 is continuously extruded, the liquid in the hydraulic bag 212 will enter the upper sleeve block 216 through the connecting pipe 215, at this time, the liquid will impact the turbine blade 223 (since the diameter of the hydraulic bag 212 is much larger than the connecting pipe 215, for this, when the hydraulic bag 212 extrudes a certain amount of liquid to enter the upper sleeve block 216 through the connecting pipe 215, at this time, the liquid is accelerated after passing through the connecting pipe 215, so that the impact force is improved), when the liquid impacts the turbine blade 223, the turbine blade 223 is rotated, the turbine blade 223 rotates through the annular connecting block 224 to drive the inner and outer threaded sleeve 22 to rotate, when the inner and outer threaded sleeve 22 rotates, the outer threaded sleeve 31 in the lower sleeve 3 and the lower inner threaded sleeve 32 in the upper sleeve 1 are respectively screwed, so as to play a self-locking role. The liquid extruded into the upper sleeve block 216 will enter the second cavity 214 through the through hole flow gap 2121 guide pipe 213 in sequence, react with the expansion medium in the second cavity 214, so as to push the hydraulic bag 212 in the reverse direction to extrude the liquid inside, through the forward plug rod 13 extrusion and the reverse expansion material extrusion, it is guaranteed that the liquid in the inner hydraulic bag 212 can be discharged, so that the inner and outer threaded sleeve 22 is rotated, the connection and locking of the upper sleeve 1 and the lower sleeve 3 are completed.

[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A grout-free, self-rotating steel sleeve connection device for vertical prefabricated components, characterized by: The invention comprises an upper sleeve (1) and a lower sleeve (3) respectively connected to the steel bars in the upper and lower vertical prefabricated components, and a quick connection mechanism (2) for connecting the upper sleeve (1) and the lower sleeve (3) and rotating them under pressure, wherein the upper sleeve (1) comprises an upper threaded sleeve (11), an internal threaded sleeve (12) and an insertion rod (13) arranged in the internal threaded sleeve (12), and the steel bars in the upper prefabricated component are rotated and locked between the upper threaded sleeve (11) by turning a threaded structure at the end thereof.

2. The grout-free, self-rotating steel sleeve connection device for vertical prefabricated components according to claim 1, characterized in that: The lower sleeve (3) comprises a lower internally threaded sleeve (32) and a lower externally threaded sleeve (31); the lower internally threaded sleeve (32) is rotationally locked with the threads of the end of the steel bars in the lower prefabricated component; and the lower externally threaded sleeve (31) has a hollow structure.

3. The grout-free, self-rotating steel sleeve connection device for vertical prefabricated components according to claim 1, characterized in that: The quick connection mechanism (2) comprises, from the outside to the inside, an internal and external threaded sleeve (22) and an internal adjustment component (21); the external and internal threaded sleeves (22) are provided with threaded structures respectively on their outer and inner surfaces for cooperating with the internal threaded sleeve (12) and the external threaded sleeve (31); and an elastic block (221) is provided at the bottom of the internal and external threaded sleeves (22).

4. The grout-free, self-rotating steel sleeve connection device for vertical prefabricated components according to claim 3, characterized in that: The inner adjustment component (21) comprises an inner guide tube (211), wherein the inner guide tube (211) comprises an upper block (216), a first cavity, and a second cavity (214) from top to bottom. The first cavity and the second cavity (214) are separated by a transverse partition. The upper block (216) is hollow. A hydraulic bladder (212) is provided in the first cavity, and a flow gap (2121) is provided in the hydraulic bladder (212). The upper block (216) and the hydraulic bladder (212) are connected by a connecting tube (215). An annular groove (2161) is provided on the upper block (216). A guide tube (213) is provided in the second cavity (214), and the guide tube (213) is connected to the flow gap (2121). The second cavity (214) is filled with a water-swelling material. A through hole is provided at the bottom of the upper block (216) for drainage.

5. The grout-free, self-rotating steel sleeve connection device for vertical prefabricated components according to claim 4, characterized in that: The guide tube (213) is provided with a plurality of permeation holes for liquid outflow, and a gap exists between the bottom of the guide tube (213) and the bottom of the inner guide tube (211).

6. A grout-free, self-rotating steel sleeve connection device for vertical prefabricated components according to claim 4, characterized in that: The diameter of the connecting pipe (215) is much smaller than the diameter of the hydraulic bladder (212), and the hydraulic bladder (212) is made of an extruded deformable material.

7. The grout-free, self-rotating steel sleeve connection device for vertical prefabricated components according to claim 4, characterized in that: The internal and external threaded sleeves (22) are connected to the upper sleeve block (216) via an annular connecting block (224); a rotating ring (222) is provided on the annular connecting ring; the rotating ring (222) is located in the gap between the upper sleeve blocks (216); the rotating ring (222) is rotatably connected to the upper sleeve block (216); and a plurality of turbine blades (223) are provided on the rotating ring (222).

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