Standardized complete device for mechanical connection of reinforcing bars

Abstract

This invention discloses a standardized complete set of mechanical connection devices for reinforcing bars, including a first reinforcing bar 1, a convex sleeve 2 for connecting the first reinforcing bar 1, a second reinforcing bar 5, an inner lining component 3 fitted onto the threaded end of the second reinforcing bar 5, and an outer sleeve 4 for connecting the convex sleeve 2 and the inner lining component 3. The inner lining component 3 comprises a first component 301, a second component 302, and a third component 303 cut according to a predetermined cutting method. The first component 301, the second component 302, and the third component 303 are assembled and fitted onto the threaded end of the second reinforcing bar 5 in a predetermined order. In practical applications, this device, relying on mechanical connection, can reliably connect the reinforcing bars in reinforcing cages and formed reinforcing bar skeletons, thus enabling more flexible adaptation to various on-site construction situations, and offering low cost, good results, and simple operation.

Description

Technical Field

[0001] This invention belongs to the field of rebar sleeve technology, specifically relating to a standardized complete set of devices for mechanical connection of rebars. Background Technology

[0002] Mechanical splicing of reinforcing bars is a connection method in which one reinforcing bar is connected to another reinforcing bar into a whole through mechanical interlocking of connectors or other auxiliary devices, and force (mainly tensile force) is transmitted through connectors or other auxiliary devices.

[0003] During construction, when the reinforcing bars at both ends are fixed and cannot rotate, the relative axial position of the two reinforcing bars cannot be adjusted or is difficult to adjust, or the space where the reinforcing bar joint is located is narrow and welding is basically not possible or the amount of welding work is large, cold extrusion of sleeves or mechanical connection with extended threads and sleeves is usually used on site. When connecting reinforcing bars with sleeves, it is difficult to keep the upper and lower reinforcing bars in a uniform shape, which can easily lead to the tensile strength of the reinforcing bar joint after cold extrusion of sleeves being much lower than the tensile strength of the main reinforcing bar, and the joint performance is unstable. In addition, cold extrusion of sleeves also has disadvantages such as heavy extrusion tools and slow extrusion speed. When mechanically connecting reinforcing bars with sleeves and extended threads, the sleeve is first screwed onto one end of the extended thread of the reinforcing bar, with the end of the sleeve flush with the end of the thread. When connecting the butt reinforcing bars, the sleeve is screwed onto the thread of the other end of the reinforcing bar. However, after the sleeve connection, there are many exposed threads on the extended thread, and the diameter of the reinforcing bar at the exposed thread part of the extended thread is smaller than the diameter of the original reinforcing bar, which will result in the tensile strength of the exposed reinforcing bar being much lower than the tensile strength of the original reinforcing bar. This phenomenon has become a problem that urgently needs to be solved by people in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a standardized complete set of equipment for mechanical connection of reinforcing bars, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a standardized complete set of equipment for mechanical connection of reinforcing bars, comprising a first reinforcing bar, a convex sleeve for connecting the first reinforcing bar, a second reinforcing bar, an inner lining assembly fitted onto the threaded end of the second reinforcing bar, and an outer sleeve for connecting the convex sleeve and the inner lining assembly. The inner lining assembly comprises a first component, a second component, and a third component cut according to a predetermined cutting method. The first component, the second component, and the third component are assembled and fitted onto the threaded end of the second reinforcing bar in a predetermined order. The convex sleeve is composed of a standard section, a transition section, and a protruding section. The inner side of the standard section, the outer side of the protruding section, the inner and outer sides of the inner lining assembly, and the inner side of the outer sleeve are respectively provided with a first internal thread, a first external thread, a second internal thread, a second external thread, and a third internal thread.

[0006] The present invention further explains that the standard section is connected to the end of the first reinforcing bar, the inner thread diameter of the standard section is the same as the end thread diameter of the first reinforcing bar, the thread length of the standard section should be slightly less than the end thread length of the first reinforcing bar, and should not exceed two thread lengths.

[0007] The present invention further explains that the length of the protruding section should ensure a reliable connection between the first and second reinforcing bars, and the diameter of the protruding section should be the sum of the thread diameter of the second reinforcing bar connection section and twice the wall thickness of the inner lining component, and the same as the outer diameter of the inner lining component.

[0008] The present invention further explains that the first internal thread is configured to match the thread of the connecting end of the first reinforcing bar, the direction of the first external thread should be the same as the direction of the thread of the first reinforcing bar, and the second external thread should be the same and connected in sequence.

[0009] The present invention further illustrates that the inner diameter of the lining component is the same as the end thread diameter of the second reinforcing bar, the outer diameter of the lining component is the same as the outer diameter of the protruding section, and the second internal thread and the second external thread are matched with the end thread and the first external thread of the second reinforcing bar.

[0010] The present invention further illustrates that the first component, the second component, and the third component are equally cut into three parts along the center direction of the inner lining assembly, forming a 120-degree arc component. The first component, the second component, and the third component are installed in a predetermined order onto the thread of the end of the second reinforcing bar. The second internal thread and the second external thread are sequentially connected to the first external thread of the end of the second reinforcing bar.

[0011] The present invention further explains that the length of the inner lining component should be slightly greater than the end thread length of the second reinforcing bar, and ensure that the number of exposed threads at the end of the second reinforcing bar after installation is not greater than two threads. The length of the outer sleeve is equal to the sum of the length of the inner lining component and the length of the protruding section. The outer diameter of the outer sleeve should be the same as the outer diameter of the standard section, and the inner diameter of the outer sleeve should be the same as the outer diameter of the inner lining component.

[0012] The present invention further illustrates that the threads of the first reinforcing bar, the first internal thread, the first external thread, the second internal thread, the second external thread, the third internal thread, and the thread of the second reinforcing bar are all threads with the same rotation direction.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention,

[0014] The connection is achieved by engaging the rotating convex sleeve with the threaded part of the first rebar, ensuring the connection is completed without the rebar being movable or rotatable. Then, the inner lining component, which is attached to the second rebar, is engaged with the threaded part of the protruding section of the convex sleeve using an outer sleeve. This ensures a reliable connection even when the second rebar is movable but not rotatable, while also guaranteeing that the number of exposed threads on the second rebar does not exceed two. This ensures that the tensile strength of the rebar connector meets the requirements, significantly increasing the reliability of the connection and guaranteeing structural safety. In practical applications, this device, relying on mechanical connection, can reliably connect the rebars in rebar cages and pre-formed rebar skeletons, thus providing greater flexibility to adapt to various on-site construction situations. It is also cost-effective, efficient, and easy to operate. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is an exploded structural diagram of the convex sleeve, inner liner assembly, and outer sleeve of the present invention;

[0018] Figure 3 This is a cross-sectional schematic diagram of the convex sleeve of the present invention.

[0019] Figure 4 This is a plan view of the liner assembly of the present invention;

[0020] Figure 5 This is a schematic diagram of a planar cut embodiment of the inner lining component of the present invention;

[0021] Figure 6 This is a cross-sectional schematic diagram of the liner assembly of the present invention;

[0022] Figure 7 This is a schematic diagram of the outer sleeve of the present invention.

[0023] In the diagram: 1. First reinforcing bar; 2. Convex sleeve; 3. Inner lining assembly; 4. Outer sleeve; 5. Second reinforcing bar; 201. Standard section; 202. Transition section; 203. Protruding section; 204. First internal thread; 205. First external thread; 301. First component; 302. Second component; 303. Third component; 304. Second internal thread; 305. Second external thread; 401. Third internal thread. Detailed Implementation

[0024] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-7 This invention provides a technical solution: a standardized complete set of mechanical connection devices for reinforcing bars, including a first reinforcing bar 1, a convex sleeve 2 for connecting the first reinforcing bar 1, a second reinforcing bar 5, an inner liner assembly 3 fitted onto the threaded end of the second reinforcing bar 5, and an outer sleeve 4 for connecting the convex sleeve 2 and the inner liner assembly 3. The inner liner assembly 3 includes a first component 301, a second component 302, and a third component 303 cut according to a predetermined cutting method. The first component 301, the second component 302, and the third component 303 are assembled and fitted onto the end of the second reinforcing bar 5 in a predetermined order. On the thread, the convex sleeve 2 is composed of a standard section 201, a transition section 202 and a protruding section 203. The inner side of the standard section 201, the outer side of the protruding section 203, the inner and outer sides of the inner lining assembly 3 and the inner side of the outer sleeve 4 are respectively provided with a first internal thread 204, a first external thread 205, a second internal thread 304, a second external thread 305 and a third internal thread 401, so as to achieve the purpose of connecting the steel bars and transmitting force. By rotating the convex sleeve 2, the end thread of the first steel bar 1 is screwed into the standard section 201, thereby achieving the purpose of connecting the first steel bar 1 and the convex sleeve 2.

[0026] Specifically, the inner lining component 3 includes a first component 301, a second component 302, and a third component 303, which are cut into three equal parts according to a predetermined cutting method. Each component has a second internal thread 304 and a second external thread 305 that are connected to each other. The second steel bar 5 is connected to the protruding section 203. After the connection is completed, the first component 301, the second component 302, and the third component 303 are arranged in the order before cutting and attached to the thread on the end of the second steel bar 5, so as to achieve a smooth fit between the protruding section 203 and the inner lining component 3 and the end of the second steel bar 5, and the second external thread 305 can be connected to the first external thread 205.

[0027] Specifically, the outer sleeve 4 is inserted into the second steel bar 5 before the inner liner assembly 3 is installed. After the inner liner assembly 3 is connected to the convex sleeve 2, the outer sleeve 4 is rotated from the connection end of the second steel bar 5 to the protruding section 205 in the direction of the third internal thread 401. The outer sleeve 4 and the convex sleeve 2 are connected by thread engagement to achieve the purpose of connecting the first steel bar 1 and the second steel bar 5.

[0028] In practice, the components of the convex sleeve 2, outer sleeve 4, and inner lining assembly 3 are pre-fabricated in the factory, while finished parts are used on-site. The ends of the first rebar 1 and the second rebar 5 are threaded. During rebar connection, the first step is to screw the convex sleeve 2, connecting it to the end thread of the first rebar 1 via the first internal thread 204 through thread engagement. The second step is to fit the outer sleeve 4 onto the upper end of the second rebar 5, ensuring that the outer sleeve 4 does not interfere with the thread position of the second rebar 5. The third step is to attach the first component 301, second component 302, and third component 303 of the inner lining assembly 3 to the end of the second rebar 5, ensuring that the second internal thread 304 can engage with the thread of the second rebar 5. The fourth step is to screw the outer sleeve 4 to connect the inner lining assembly 3. The protruding section 203 of component 3 and convex sleeve 2 is fitted into outer sleeve 4. The first reinforcing bar 1 and the second reinforcing bar 5 are fully connected by the thread engagement of the third internal thread, the second external thread 305 and the first external thread 205. Through the above example, it can be clearly seen that compared with the existing technology of cold extrusion of sleeve or mechanical connection of extended thread and sleeve, the present invention can better ensure the reliability of reinforcing bars, reinforcing cages and other reinforcing bar connectors. Moreover, the connection method is simple, the effect is good, the tensile strength can be reliably guaranteed, and it can overcome various reinforcing bar installation errors and other defects. Therefore, it can more flexibly adapt to various on-site construction conditions, and it is low in cost, effective and easy to operate.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention 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 of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of using a standardized set of mechanical connection equipment for reinforcing bars, the standardized set of mechanical connection equipment for reinforcing bars comprising a first reinforcing bar (1), a convex sleeve (2) for connecting the first reinforcing bar (1), a second reinforcing bar (5), an inner lining assembly (3) fitted onto the threaded end of the second reinforcing bar (5), and an outer sleeve (4) for connecting the convex sleeve (2) and the inner lining assembly (3), characterized in that: The inner lining assembly (3) includes a first component (301), a second component (302), and a third component (303) cut according to a predetermined cutting method. The first component (301), the second component (302), and the third component (303) are assembled and attached to the end thread of the second steel bar (5) in a predetermined order. The convex sleeve (2) is composed of a standard section (201), a transition section (202), and a protruding section (203). The inner side of the standard section (201), the outer side of the protruding section (203), the inner and outer sides of the inner lining assembly (3), and the inner side of the outer sleeve (4) are respectively provided with a first internal thread (204), a first external thread (205), a second internal thread (304), a second external thread (305), and a third internal thread (401). Instructions for using standardized complete sets of mechanical rebar connection equipment Includes the following steps: The first step is to screw on the convex sleeve, which connects to the end thread of the first rebar through the first internal thread and the thread engagement. The second step is to slip the outer sleeve onto the upper part of the end of the second rebar, ensuring that the outer sleeve does not conflict with the threaded position of the end of the second rebar. The third step is to connect the second steel bar to the end of the protruding section, and to attach the first, second and third parts of the inner lining assembly to the end of the second steel bar, and to ensure that the second internal thread can be fitted into the thread of the end of the second steel bar to ensure that the threads mesh with each other. The fourth step is to screw the outer sleeve and insert the inner lining assembly and the protruding section of the convex sleeve into the outer sleeve. The first and second reinforcing bars are fully connected by the thread engagement of the third internal thread, the second external thread and the first external thread.

2. The method of using the standardized complete set of mechanical connection equipment for reinforcing bars according to claim 1, characterized in that: The standard section (201) is connected to the end of the first reinforcing bar (1), and the inner thread diameter of the standard section (201) is the same as the end thread diameter of the first reinforcing bar (1).

3. The method of using a standardized complete set of mechanical connection equipment for reinforcing bars according to claim 2, characterized in that: The length of the protruding section (203) should ensure a reliable connection between the first reinforcing bar (1) and the second reinforcing bar (5). The diameter of the protruding section (203) should be the sum of the thread diameter of the connecting section of the second reinforcing bar (5) and twice the wall thickness of the inner lining component (3), and should be the same as the outer diameter of the inner lining component (3).

4. The method of using a standardized complete set of mechanical connection equipment for reinforcing bars according to claim 2, characterized in that: The first internal thread (204) is configured to match the connecting end thread of the first reinforcing bar (1), and the direction of the first external thread (205) should be the same as the thread direction of the first reinforcing bar (1), and the same as and connected to the second external thread (305).

5. The method of using a standardized complete set of mechanical connection equipment for reinforcing bars according to claim 1, characterized in that: The inner diameter of the lining component (3) is the same as the end thread diameter of the second reinforcing bar (5), the outer diameter of the lining component (3) is the same as the outer diameter of the protruding section (203), and the second inner thread (304) and the second outer thread (305) are matched with the end thread of the second reinforcing bar (5) and the thread of the first outer thread (205).

6. The method of using a standardized complete set of mechanical connection equipment for reinforcing bars according to claim 5, characterized in that: The first component (301), the second component (302) and the third component (303) are equally cut into three parts along the center direction of the inner lining assembly (3) and form a 120-degree arc component. The first component (301), the second component (302) and the third component (303) are attached to the thread on the end of the second reinforcing bar (5) in a predetermined installation order. The second internal thread (304) and the second external thread (305) are sequentially connected to the first external thread (205) on the end of the second reinforcing bar (5).

7. The method of using a standardized complete set of mechanical connection equipment for reinforcing bars according to claim 3, characterized in that: The length of the inner lining component (3) should be slightly greater than the end thread length of the second reinforcing bar (5), and ensure that the number of exposed threads at the end of the second reinforcing bar (5) after installation is not greater than two threads. The length of the outer sleeve (4) is equal to the sum of the length of the inner lining component (3) and the length of the protruding section (203). The outer diameter of the outer sleeve (4) should be the same as the outer diameter of the standard section (201). The inner diameter of the outer sleeve (4) should be the same as the outer diameter of the inner lining component (3).

8. The method of using a standardized complete set of mechanical connection equipment for reinforcing bars according to claim 1, characterized in that: The threads of the first reinforcing bar (1), the first internal thread (204), the first external thread (205), the second internal thread (304), the second external thread (305), and the third internal thread (401), as well as the threads of the second reinforcing bar (5), are all threads with the same rotation direction.

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