Reinforcing steel bar connecting device for building and prefabricated fast-assembly connecting module of reinforcing steel bar connecting device

Abstract

The utility model discloses a steel bar connecting device for building and a prefabricated fast-assembly connecting module thereof, which comprises a shell, two openings are arranged along the axial direction of the shell, a wedge-shaped sliding block mechanism is fixedly arranged on the inner wall of the shell close to at least one opening, and the wedge-shaped sliding block mechanism is used for clamping a steel bar to be connected; a first limiting device and a second limiting device are sequentially arranged on the rear portion of the wedge-shaped sliding block mechanism, the first limiting device and the second limiting device are both fixed to the inner wall of the shell, and the first limiting device is used for limiting movement of the wedge-shaped sliding block mechanism; a spring is arranged between the first limiting device and the second limiting device and can provide elastic force in the axial direction of the shell, and the two ends of the spring are fixed to the first limiting device and the second limiting device respectively.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a steel bar connection device for building and its prefabricated quick-installation connection module. Background Technology

[0002] In building construction, to address the issue of poor tensile strength in concrete, the primary method is to incorporate interconnected steel bars into the concrete to improve its overall tensile strength. Concrete requires a large amount of steel reinforcement to strengthen building components. In current construction practices, the steel bars are connected at joints before concrete pouring.

[0003] Current methods of connecting steel bars (such as lap splicing, welding, and mechanical connection) require a large number of on-site procedures and are cumbersome to construct. They require fixing and connecting several steel bars before pouring concrete to form columns or concrete beams.

[0004] CN111119160A discloses a one-way self-locking quick rebar connector, including a force transmission box, threaded clamps, elastic elements, buffer rings, and a connecting cylinder. It achieves quick connection of rebars through self-locking. During the construction of the rebar cage, the connector can be screwed into the rebar at the same cross-section position first, and then the rebar cage can be spliced ​​with another rebar cage under mechanical action.

[0005] CN213654001U discloses a rebar joint connection device for civil engineering construction, including a first rebar, a second rebar fixedly disposed at the right end of the first rebar, and the outer walls of the adjacent ends of the first and second rebars being fixedly threaded. A first fixing ring is threadedly connected to the outer wall of the first rebar, a first sleeve is threadedly connected to the right end of the first fixing ring at the outer wall end of the first rebar, a second fixing ring is threadedly connected to the outer wall of the second rebar, and a second sleeve is threadedly connected to the left end of the second fixing ring at the outer wall of the second rebar. By using the first rebar, second rebar, first fixing ring, second fixing ring, first sleeve, second sleeve, and connecting sleeve in coordination, this device solves the problem that most existing rebar joint connection devices for civil engineering construction use a bidirectional connecting sleeve threaded connection to connect the rebar joints at both ends, requiring the rebar to be rotated to complete the connection and installation during the sleeve process. This wastes a lot of manpower and time, has a significant impact on the project progress and schedule, and results in high labor and material costs. Summary of the Invention

[0006] The purpose of this utility model is to provide a steel bar connection device for construction and its prefabricated quick-installation connection module. The connection device does not require pre-processing threads on the ends of the steel bars, which would otherwise make connecting the two steel bars difficult. It also avoids the situation where the two threaded steel bars loosen or deform due to external forces during later use. Moreover, it can achieve rapid mechanical installation of two steel bars in the case of precast concrete.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A steel bar connection device for construction includes a housing with two openings along the axial direction of the housing. A wedge-shaped slider mechanism is fixedly disposed on the inner wall of the housing near at least one of the openings. The wedge-shaped slider mechanism is used to clamp the steel bars to be connected. A first limiting device and a second limiting device are sequentially disposed at the rear of the wedge-shaped slider mechanism. Both the first limiting device and the second limiting device are fixed to the inner wall of the housing, and the first limiting device is used to limit the movement of the wedge-shaped slider mechanism. A spring is disposed between the first limiting device and the second limiting device. The spring is capable of providing elastic force along the axial direction of the housing. The spring is used to provide an initial preload, and both ends of the spring are respectively fixed to the first limiting device and the second limiting device.

[0009] Furthermore, the connection method between the wedge-shaped slider mechanism and the inner wall of the housing is selected from the following: threaded connection, welding, and snap-fit.

[0010] In one specific embodiment, the wedge slider mechanism includes an annular wedge and a slip ring, and the slip ring can be a complete annular ring, or two opposing wedge sliders, or a semi-enclosed groove structure.

[0011] In one specific embodiment, to enhance self-locking performance, the inclined plane of the wedge-shaped slider mechanism has an inclination angle of 14 degrees.

[0012] In one specific embodiment, the shell sequentially includes an integrally formed first cylindrical tube, a frustum-shaped tube, and a second cylindrical tube; the diameter of the first cylindrical tube is larger than the diameter of the second cylindrical tube, and the frustum-shaped tube is tapered toward the second cylindrical tube; the opening in the first cylindrical tube is the large end of the shell, and the opening in the second cylindrical tube is the small end of the shell; the large end is used for clamping and inserting a reinforcing bar, and the small end is used for inserting and connecting another reinforcing bar;

[0013] Furthermore, the second cylindrical tube is used to fix and connect the reinforcing bar inserted from the smaller end; the frustum tube is a cavity, serving as a buffer area to prevent the two reinforcing bars from colliding due to violent impact from external forces during actual use; and the diameter of the frustum tube formed on the inner wall of the frustum tube is slightly smaller than the diameter of the reinforcing bar.

[0014] Preferably, the ratio of the axial length of the elastic zone to the truncated cone that acts as a buffer is 3:1.

[0015] Optionally, the inner wall of the second cylindrical tube is threaded for threaded connection with a reinforcing bar inserted from the smaller end, and the reinforcing bar is inserted into the second cylindrical tube by 25-30mm.

[0016] In one specific embodiment, the housing is cylindrical, and a baffle is fixedly arranged in the axial center of the housing. The size of the baffle is adapted to the size of the inner wall of the third cylindrical tube to be fixed on the inner wall of the third cylindrical tube. A spring, a first limiting ring and a wedge-shaped slider mechanism are symmetrically arranged from both ends of the baffle towards their respective opening directions. The two ends of the spring are fixedly arranged on the baffle and the first limiting ring, and the first limiting ring restricts the movement of the slip ring of the wedge-shaped slider mechanism.

[0017] A prefabricated quick-installation connection module includes a building steel bar connection device and steel bars, wherein the building steel bar connection device and the steel bars are fixedly connected, and concrete fills the outer surface of the building steel bar connection device and the steel bars to form a rectangular structure; the quick-installation connection module has an access end and an extension end arranged opposite to each other; the access end is used to connect the steel bars of the extension end of another quick-installation connection module; the access end of the quick-installation connection module is flush with one end of the building steel bar connection device; and the extension end protrudes 25-30mm from the steel bars;

[0018] Furthermore, at least one end of the building steel bar connection device is provided with a wedge-shaped slider mechanism for clamping the steel bars to be connected.

[0019] The two quick-connect modules are connected as follows: the reinforcing bar at the protruding end of one quick-connect module is wedge-connected to the inlet end of the other quick-connect module, that is, the wedge-shaped slider mechanism is used to generate pressure to clamp the reinforcing bar.

[0020] Compared with the prior art, the beneficial effects of the technical solution of this utility model are:

[0021] The connecting device described in this utility model changes the existing rotary installation method by adopting a wedge connection method. The axial thrust generated when the reinforcing bar enters the connecting device applies radial pressure to the outer surface of the entering reinforcing bar, thereby clamping the reinforcing bar into the connecting device. Furthermore, the quick-installation connecting module of the connecting device is a prefabricated module, allowing for rapid mechanical installation of two reinforcing bars with simple insertion. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the steel bar connection device for construction described in Embodiment 1 of this utility model;

[0023] Figure 2This is a schematic diagram of the quick-assembly connection module splicing structure including the steel bar connection device described in Embodiment 1;

[0024] Figure 3 This is a structural schematic diagram of the steel bar connection device for construction described in Example 2;

[0025] Figure 4 This is a schematic diagram of the quick-connect module structure including the steel bar connection device described in Embodiment 2.

[0026] in,

[0027] 101: First cylindrical tube; 102: Frustum-shaped tube; 103: Second cylindrical tube; 104: Quick-connect module;

[0028] 1: Quick-assembly zone; 2: Flexible zone; 3: Reinforcing steel; 5: Shell;

[0029] 6: Wedge; 7: Slip ring; 8: First limiting ring; 9: Second limiting ring; 10: Spring;

[0030] 11: Baffle; 105: Reinforcing bar connection device; 106: Third cylindrical tube; 107: Concrete Detailed Implementation

[0031] To make the objectives, technical solutions, beneficial effects, and significant advancements of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, all the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] Example 1

[0033] like Figure 1 As shown, a steel bar connection device for construction includes a tapered housing 5. From left to right (from the larger end to the smaller end), the housing comprises an integrally formed first cylindrical tube 101, a frustum-shaped tube 102, and a second cylindrical tube 103. The diameter of the first cylindrical tube 101 is larger than the diameter of the second cylindrical tube 103, and the frustum-shaped tube 102 tapers towards the second cylindrical tube 103. The opening in the first cylindrical tube 101 is the larger end of the housing 5, and the opening in the second cylindrical tube 103 is the smaller end of the housing 5. The larger end is used for clamping and inserting a steel bar 3, and the smaller end is used for fixing another steel bar 3.

[0034] The cavity inside the first cylindrical tube 101 is divided into a quick-release zone 1 and an elastic zone 2. The quick-release zone 1 is used to accommodate and axially clamp the reinforcing bar 3 inserted axially from the large end. A wedge-shaped slider mechanism is provided inside the quick-release zone 1, and at least part of the inner wall of the shell 5 is threaded. The wedge-shaped slider mechanism includes an annular wedge 6 and a slip ring 7. Both the wedge 6 and the slip ring 7 are annular structures, and the outer wall of the wedge 6 has threads that are adapted to the inner wall of the quick-release zone 1 for threaded connection with the inner wall of the shell 5. The wall opposite to the outer wall of the wedge 6 is an inclined surface that gradually widens towards the large end; the outer wall of the slip ring 7 is an inclined wall that is adapted to the inclined surface of the wedge 6, so that the slip ring 7 can slide axially along the inner wall of the wedge 6 and along the inner wall of the shell 5; the inner wall of the slip ring 7 is adapted to the diameter of the reinforcing bar to be inserted, so that the inner wall of the slip ring 7 can contact the reinforcing bar, and as the reinforcing bar 3 is inserted into the quick-release zone 1 along the shell, the slip ring 7 slides along the inclined surface. The reinforcing bar passes sequentially through the wedge 6 and the slip ring 7, and is fitted onto the inner wall of the slip ring 7. The reinforcing bar also serves as a guide. By inserting the reinforcing bar, the outer wall of the slip ring 7 is pressed against the inclined surface of the inner wall of the wedge 6, which in turn pushes the slip ring to slide the reinforcing bar inward and clamp it. To enhance self-locking performance, the inclined surface of the wedge-shaped slider mechanism has an inclination angle of 14 degrees.

[0035] Depending on actual needs, the wedge 6 can be connected by other methods, such as snap-fit, as long as the outer wall of the wedge 6 can be fixedly connected to the inner wall of the first cylindrical tube 101.

[0036] Depending on the actual needs, the slip ring 7 does not have to be a complete ring; it can be three oppositely arranged wedge-shaped sliders or a semi-enclosed groove structure.

[0037] A first limiting ring 8 and a second limiting ring 9 are provided on the inner wall of the housing 5 at both ends of the elastic zone 2. The ring width of the first limiting ring 8 and the second limiting ring 9 is 28-30mm. The first limiting ring 8 is located at one end near the quick-release zone 1, and the upper surface of the first limiting ring 8 is used to limit the axial movement of the slip ring 7; the lower surface of the first limiting ring 8 is used to fix one end of the spring 10; the second limiting ring 9 is located at the other end of the elastic zone 2, and the upper surface of the second limiting ring 9 is used to fix the other end of the spring 10. The spring 10 can move axially along the inner wall of the housing within the elastic zone 2 under the action of the slip ring 7. When the reinforcing bar 3 enters the housing and is inserted into the spring 10, the spring is compressed. Since the other end of the spring is fixed on the second limiting ring 9, it provides a reverse elastic force to the slip ring 7.

[0038] The interior of the frustum-shaped cylinder 102 is a frustum-shaped cavity, which serves as a buffer area to prevent the two opposing surfaces of the reinforcing bars 3 from colliding due to violent impacts from external forces during actual use. Moreover, the larger diameter of the frustum formed on the inner wall of the frustum-shaped cylinder 102 is the same as the diameter formed on the inner wall of the first cylindrical cylinder 101, while the smaller diameter of the frustum formed on the inner wall of the frustum-shaped cylinder 102 is slightly smaller than the diameter of the reinforcing bar.

[0039] Furthermore, the axial length ratio of the elastic zone 2 to the frustum cylinder 102 that plays a buffering role is 3:1.

[0040] The second cylindrical tube 103 is used to fix one end of another reinforcing bar 3, and the inner diameter of the second cylindrical tube 103 is adapted to the outer diameter of the reinforcing bar 3. Depending on actual needs, a 35mm thread can be pre-machined on one end of the reinforcing bar, and a matching thread can be pre-made on the inner wall of a portion of the second cylindrical tube 103, thereby threading one end of the reinforcing bar 3 to the inner wall of the second cylindrical tube 103. It must be ensured that the reinforcing bar 3 is inserted into the second cylindrical tube 25-30mm, and that the inserted end is 5-10mm away from the second limiting ring.

[0041] like Figure 2 As shown, a prefabricated quick-assembly connection module 104 includes the aforementioned steel reinforcement connection device 105, steel bars 3, and concrete 107. The quick-assembly connection module has a cuboid structure, with interconnected steel reinforcement connection devices and steel bars 3 arranged horizontally inside. Its two ends along the longitudinal direction are an access end and a protruding end, respectively. Furthermore, the access end of the quick-assembly connection module is flush with the large end of the steel reinforcement connection device, and the protruding end exposes 25-30mm of the steel bar. The preparation method of the quick-assembly connection module 104 is as follows:

[0042] One end of the reinforcing bar 4 is axially inserted into the second cylindrical tube 103 from the small end of the building reinforcing bar connection device to a depth of 25-30mm, and the end of the reinforcing bar is welded to the inner wall of the second cylindrical tube 103 to make them a whole;

[0043] Then, concrete is poured onto the connected building steel bar connector and the outer surface of the steel bar, and a mold is used to form a rectangular concrete module with equal length and width. Moreover, the end of the steel bar that does not extend into the building steel bar connector protrudes 25-30mm from the quick-installation connector module, and the large end of the building steel bar connector is flush with one end of the quick-installation connector module, thereby forming a prefabricated quick-installation connector module.

[0044] When using Figure 2As shown, two prefabricated quick-connect modules 104 are placed horizontally on the ground. The protruding steel bar head of one of the quick-connect modules 104 is inserted into the access end of the other quick-connect module 104. When inserted, the outer wall of the steel bar cooperates with the surface of the wedge-shaped slider mechanism. The steel bar drives the outer wall of the slip ring 7 to press against the inner wall of the wedge 6, reducing the inner diameter of the first cylindrical tube 101, thereby clamping the steel bar 3 until it reaches the first limiting ring 8.

[0045] Example 2

[0046] A steel bar connection device for construction is similar to that in Embodiment 1; the differences are described below.

[0047] like Figure 3 As shown, the outer shell of the connecting device is a cylindrical third cylindrical tube 106, with an opening at each end for inserting reinforcing bars. The internal structure of the third cylindrical tube 106 is symmetrically arranged, and a baffle 11 is fixedly installed at the axial center of the third cylindrical tube 106. The size of the baffle is adapted to the inner wall size of the third cylindrical tube 106 for fixation. The thickness of the baffle 11 is 1-2 mm. A spring 10, a first limiting ring 8, and a wedge-shaped slider mechanism are symmetrically arranged from both ends of the baffle 11 towards their respective openings.

[0048] The two ends of the spring 10 are fixedly mounted on the baffle 11 and the first limiting ring 8, and the first limiting ring 8 restricts the movement of the slip ring 7 of the wedge-shaped slider mechanism. The outer wall of the wedge 6 is threaded for threaded connection with a portion of the inner wall of the third cylindrical tube 106.

[0049] like Figure 4 As shown, a prefabricated quick-installation connection module 104 includes the aforementioned steel bar connection device 105, steel bars 3, and concrete 107. The quick-installation connection module has a cuboid structure, with the steel bar connection device 105 and steel bars 3 interconnected along the horizontal direction inside. The two ends along the longitudinal direction are an access end and a protruding end, respectively. The access end of the quick-installation connection module is flush with the large end of the steel bar connection device, and the protruding end exposes the steel bar by 25-30mm. Since the two ends of the steel bar connection device 105 have identical structures, the two steel bars 3 are inserted into the two ends of the steel bar connection device 105 respectively, and their connection method is the same: axial insertion while simultaneously reducing the inner diameter of the steel bar connection device 105 to clamp the steel bars, thus achieving the connection between the two.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. Non-essential improvements, adjustments or substitutions made by those skilled in the art based on the content of this specification are all within the scope of protection claimed by this utility model.

Claims

1. A reinforcing bar coupling device for use in construction, characterised in that, The shell (5) has two openings in the axial direction, a wedge-shaped sliding block mechanism is fixedly arranged on the inner wall of the shell (5) near at least one of the openings, the wedge-shaped sliding block mechanism is used for clamping the steel bar (3) to be connected, the rear part of the wedge-shaped sliding block mechanism is sequentially provided with a first limiting device (8) and a second limiting device (9, 11), the first limiting device (8) and the second limiting device (9, 11) are fixed on the inner wall of the shell, and the first limiting device (8) is used for limiting the movement of the wedge-shaped sliding block mechanism, a spring (10) is arranged between the first limiting device (8) and the second limiting device (9, 11), the spring (10) can provide elastic force in the axial direction of the shell (5), and the both ends of the spring are fixed on the first limiting device (8) and the second limiting device (9, 11) respectively.

2. The building rebar connecting device according to claim 1, characterized in that, The connection mode of the wedge-shaped sliding block mechanism and the inner wall of the shell is selected from one of the following: threaded connection, welding and clamping.

3. The building rebar connecting device according to claim 1, characterized in that, The wedge-shaped sliding block mechanism includes an annular wedge body (6) and a sliding ring (7), and the structure of the sliding ring (7) is selected from one of the following: annular, two oppositely arranged wedge-shaped sliding blocks, and a half-enclosed groove structure.

4. The building rebar coupling device of claim 3, wherein, The inclination angle of the inclined surface of the wedge-shaped sliding block mechanism is 14 degrees.

5. The building rebar connecting device according to claim 1, wherein, The shell (5) sequentially includes an integrally formed first cylindrical barrel (101), a circular truncated cone barrel (102) and a second cylindrical barrel (103); the diameter of the first cylindrical barrel (101) is greater than the diameter of the second cylindrical barrel (103), and the circular truncated cone barrel (102) is in a tapered form towards the second cylindrical barrel (103), the opening located at the first cylindrical barrel (101) is the large end of the shell (5), and the opening located at the second cylindrical barrel (103) is the small end of the shell (5), the large end is used for clamping insertion of a steel bar (3), and the small end is used for insertion of connection of another steel bar (3); And the second cylindrical barrel (103) is used for fixed connection of the steel bar (3) inserted from the small end; the circular truncated cone barrel (102) is a hollow cavity, which is used as a buffer area, and the small-diameter circular truncated cone formed on the inner wall of the circular truncated cone barrel (102) has a diameter smaller than that of the steel bar.

6. The building rebar coupling device of claim 5, wherein, The cavity inside the first cylindrical barrel (101) is divided into a quick-mounting area (1) and an elastic area (2); the axial length ratio of the elastic area (2) to the circular truncated cone barrel (102) is 3:

1.

7. The building rebar connecting device according to claim 5, wherein, The inner wall of the second cylindrical barrel (103) is processed with threads, which is used for threaded connection with the steel bar (3) inserted from the small end, and the steel bar is inserted into the second cylindrical barrel (103) by 25-30 mm.

8. The building rebar connecting device of claim 1, wherein, The shell (5) is a third cylindrical cylinder (106), a second limiting device (9, 11) is fixedly arranged at the axial middle part inside the shell, the size of the second limiting device (9, 11) is matched with the size of the inner wall of the third cylindrical cylinder (106) to be fixed on the inner wall of the third cylindrical cylinder (106); a spring (10), a first limiting device (8) and a wedge-shaped slider mechanism are symmetrically arranged from the two ends of the second limiting device (9, 11) to the opposite opening directions, respectively; the two ends of the spring (10) are fixedly arranged on the second limiting device (9, 11) and the first limiting device (8), and the first limiting device (8) limits the movement of the sliding ring (7) of the wedge-shaped slider mechanism.

9. A prefabricated quick-fit connection module (104), characterized in that The building steel connecting device (105) and the steel bar (3) are fixedly connected, the outer surfaces of the building steel connecting device (105) and the steel bar (3) are filled with concrete, and a rectangular structure is formed; the fast-assembly connecting module (104) has an access end and an extension end arranged oppositely; the access end is used for connecting the steel bar of the extension end of another fast-assembly connecting module (104); the access end of the fast-assembly connecting module (104) is flush with one end of the building steel connecting device (105); and the extension end is exposed by 25-30 mm from the steel bar; Moreover, the building steel connecting device (105) is provided with a wedge-shaped slider mechanism at at least one end for clamping the steel bar to be connected; The connection mode of two fast-assembly connecting modules (104) is that the steel bar of the extension end of one fast-assembly connecting module (104) is wedge-connected with the access end of another fast-assembly connecting module (104), that is, the wedge-shaped slider mechanism is used to generate pressure to clamp the steel bar (3).

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