Steel bar connecting sleeve

Abstract

The utility model provides a steel bar connecting sleeve which comprises a sleeve body, a first internal thread extending in the axial direction of the sleeve body is arranged in the sleeve body, and the two ends of the sleeve body are each provided with a section of the first internal thread so that the first internal thread can be connected with two steel bars. And the small diameter of each section of first internal thread is gradually reduced from the end part of the sleeve body to the middle part of the sleeve body to form a conical thread section. The threaded sleeve and the extrusion sleeve are integrated, the conical internal thread structure is arranged in the sleeve body, and the conical internal thread can gradually weaken the section of a reinforcing steel bar from outside to inside so as to adapt to the stress change of the reinforcing steel bar, so that the stress consistency of the reinforcing steel bar is ensured, and the connecting strength of the reinforcing steel bar is improved; therefore, the connecting structure which is high in tolerance, high in quality and low in cost and is used for reinforcing steel bar extension can be provided.

Description

Technical Field

[0001] The present application relates to the technical field of steel bar extension construction, and specifically, to a steel bar connecting sleeve. Background Art

[0002] Modular steel bar construction is becoming more and more common in the field of construction engineering. During the production of modular steel bars, deviations in steel bar cutting and positioning are inevitable, making it difficult to construct steel bar connections on site.

[0003] At present, the common steel bar connection methods are straight thread sleeve connection and extrusion sleeve connection. The straight thread sleeve connection is a connection method in which the end of the steel bar is threaded to form an external thread, and then the sleeve is threaded to form an internal thread, and then the steel bar and the sleeve are connected by thread. However, the straight thread sleeve has poor fault tolerance for steel bars, and there is a deviation in the installation position of some steel bars. Since the straight thread sleeve needs to be precisely docked, the connection of the straight thread sleeve is more difficult. The extrusion sleeve connection is to insert the steel bar into the sleeve, and then through multiple circumferential extrusions, the sleeve is partially embedded in the steel bar. The embedded part serves as a shear structure to provide the steel bar connection tension. Since the extrusion depth of each extrusion ring of the conventional extrusion sleeve is the same, the degree of weakening of the steel bar by each extrusion section is the same, and the steel bar is subjected to the greatest force at the entrance of the sleeve, while the steel bar is subjected to the least force in the middle of the sleeve. For this feature, the conventional extrusion sleeve is also weakened more at the point where the steel bar is subjected to the greatest force, while the conical internal thread extrusion sleeve is weakened less at the point where the steel bar is subjected to the greatest force, making the connection strength of the conventional extrusion sleeve not high. Utility Model Content

[0004] In view of the shortcomings of the existing methods, the present application proposes a steel bar connection sleeve to solve the technical problems of poor fault tolerance for steel bars and low connection strength existing in the related technology.

[0005] The present application provides a steel bar connecting sleeve, which includes a sleeve body, wherein the sleeve body is provided with a first internal thread extending along its axial direction, and the first internal thread is provided with a section at each end of the sleeve body for connecting two steel bars respectively, and there is a spacing between two adjacent thread teeth of each section of the first internal thread, and the minor diameter of each section of the first internal thread gradually decreases from the end of the sleeve body toward the middle of the sleeve body to form a tapered thread section.

[0006] It is further provided that: the taper range of the tapered thread segment is between 0.01-0.02.

[0007] It is further provided that: a straight thread section is provided in the middle of the sleeve body, and the minor diameters of the internal threads of the straight thread section are equal.

[0008] It is further provided that: an intermediate baffle is provided in the middle of the sleeve body, and the intermediate baffle divides the sleeve body into two connecting parts.

[0009] It is further provided that: the ends of the two connecting parts close to the middle baffle are provided with straight thread segments, and the ratio of the axial length of the straight thread segment along the sleeve body to the axial length of the tapered thread segment along the sleeve body in each connecting part is 1:3.

[0010] It is further provided that: elastic parts which can be deformed along the axial direction of the sleeve body are provided on both sides of the intermediate baffle.

[0011] It is further configured that a through hole is provided in the middle of the middle baffle.

[0012] Further configuration: the internal thread is a triangular thread.

[0013] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include:

[0014] 1. The steel bar connecting sleeve of the present application integrates a threaded sleeve and an extruded sleeve into one, and arranges a tapered internal thread structure inside the sleeve body. The tapered internal thread structure can gradually increase the weakening of the steel bar cross section from the outside to the inside to adapt to the stress changes of the steel bar, ensure the consistency of the stress on the steel bar, and improve the connection strength of the steel bar, thereby providing a high-tolerance, high-quality, and low-cost connection structure for steel bar extension.

[0015] 2. In the steel bar connection sleeve involved in the present application, by providing a straight threaded section as an adjustment section for steel bar length deviation in the middle of the sleeve body, the tolerance capacity of the steel bar connection length can be improved.

[0016] 3. In the steel bar connecting sleeve involved in the present application, by setting an intermediate stopper in the middle of the sleeve body and setting elastic parts on both sides of the intermediate stopper, it is possible to detect whether the length of the steel bar extending into the sleeve body meets the connection requirements, while ensuring the centered connection of the sleeve.

[0017] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A schematic structural diagram of a steel bar connection sleeve provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a steel bar connecting sleeve and a steel bar connected to each other provided in an embodiment of the present application.

[0021] In the figure, 1, sleeve body; 2, tapered thread section; 21, first internal thread; 3, straight thread section; 31, second internal thread; 4, middle baffle; 41, through hole; 5, elastic member; 100, steel bar. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0023] Those skilled in the art will appreciate that, unless specifically stated, the "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of the present application refers to the presence of the features, steps, elements and / or components, but does not exclude the implementation of other features, steps, elements, components and / or their combinations supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0024] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0029] In view of the poor tolerance of the current straight thread sleeve for steel bar extension and the poor connection strength of the conventional extrusion sleeve, see Figure 1 and Figure 2 The present application provides a steel bar connection sleeve, which can provide a high-tolerance, high-quality, low-cost connection structure for steel bar connection, and can meet the steel bar Class I connection standard, thereby increasing the connection length of the steel bar extension.

[0030] Specifically, the steel bar connection sleeve of the present application includes a sleeve body 1, and a first internal thread 21 extending along its circumferential direction is provided in the sleeve body 1. The first internal thread 21 is provided at each end of the sleeve body 1 for connecting two steel bars 100 respectively. The minor diameter of each section of the first internal thread 21 gradually decreases from the end of the sleeve body 1 toward the middle of the sleeve body 1 to form a tapered thread section 2. The tapered thread section 2 can form a tapered internal thread structure inside the sleeve body 1, thereby forming a sleeve structure with a large inlet and a small interior. Under the extrusion of annular external force, the internal thread of the sleeve body 1 can be pressed into the steel bar 100, so that the steel bar 100 and the sleeve can fit tightly, and the internal thread can serve as a shear-resistant member of the steel bar 100, so that the steel bar 100 can only transmit force along its axial direction.

[0031] The taper range of the tapered thread section of this embodiment is between 0.01-0.02, so when connecting the steel bar 100, the first internal thread 21 can guide the steel bar 100, improve the tolerance of the connection dislocation of the steel bar 100, and facilitate the smooth docking of the steel bar 100. At the same time, since the steel bar 100 is subjected to the greatest force at the entrance of the conventional sleeve, and the steel bar 100 is subjected to the least force at the middle of the conventional sleeve, the present application sets a tapered internal thread structure inside the sleeve body 1, so that when the sleeve body 1 is squeezed, the deeper the first internal thread 21 squeezes the steel bar 100, the greater the weakening area of ​​the steel bar 100, and vice versa, the first internal thread 21 squeezes less at the opening of the sleeve body 1, reducing the weakening area of ​​the steel bar 100, that is, the present application weakens the cross section of the extruded steel bar 100 through the tapered internal thread structure to adapt to the force change of the steel bar 100, ensures the consistency of the force of the steel bar 100, and then improves the purpose of the connection strength of the steel bar 100.

[0032] At the same time, the present application provides a straight thread section 3 in the middle of the sleeve body 1, the second internal thread 31 of the straight thread section 3 has the same minor diameter, and the first internal thread 21 of the tapered thread section 2 is connected to the second internal thread 31 of the straight thread section 3. The present application further improves the tolerance of the connection length of the steel bar 100 by providing the straight thread section 3 as an adjustment section for the length deviation of the steel bar 100.

[0033] The sleeve body 1 is also provided with an intermediate baffle 4 in the middle thereof, and the intermediate baffle 4 divides the sleeve body 1 into two connection parts, respectively corresponding to the connection of two steel bars 100, and straight thread segments 3 are provided at the ends of the two connection parts close to the intermediate baffle 4, and the ratio of the axial length of the straight thread segment 3 along the sleeve body 1 to the axial length of the tapered thread segment 2 along the sleeve body 1 in each connection part is 1:3. In a specific embodiment, the two connection parts are each provided with a 10mm straight thread segment 3, and the maximum length adjustment amount of 20mm can be achieved.

[0034] Furthermore, the sleeve body 1 is provided with elastic members 5 that deform axially along the sleeve body 1 on both sides of the middle baffle 4. The elastic member 5 can be a spring coil. The steel bar 100 is inserted into the sleeve body 1 and abuts against the spring coil. Therefore, after the steel bar 100 and the sleeve body 1 are connected, the worker can manually shake the sleeve body 1 to detect whether the insertion length of the steel bar 100 meets the requirements, so as to ensure the centered connection of the sleeve body 1.

[0035] In addition, a through hole 41 is opened in the middle of the middle baffle 4. The setting of the through hole 41 can reduce the resistance of the middle baffle 4 to the extrusion sleeve, so as to facilitate the annular extrusion of the sleeve body 1 by external force, and at the same time reduce the dead weight of the sleeve body 1 and reduce the burden on the extension of the steel bar 100.

[0036] The first internal thread 21 and the second internal thread 31 of the present application are both configured as triangular threads, the tips of which can be easily pressed into the steel bar 100 and have high durability.

[0037] In summary, the steel bar connecting sleeve of the present application integrates a threaded sleeve and an extruded sleeve into one, and by arranging a conical internal thread structure inside the sleeve body 1, the conical internal thread can achieve a gradual weakening of the cross-section of the steel bar 100 from the outside to the inside to adapt to the stress changes of the steel bar 100, ensure the consistency of the stress of the steel bar 100, and improve the connection strength of the steel bar 100, thereby providing a high-tolerance, high-quality, and low-cost connection structure for extending the steel bar 100.

[0038] In addition, the present application also relates to a steel bar connection method using the volume steel bar connection sleeve described above, which comprises the following steps:

[0039] First, insert the two steel bars to be connected into the two ends of the sleeve body 1 of the steel bar connecting sleeve respectively. The first internal thread 21 of the steel bar connecting sleeve can guide the steel bars, facilitate the smooth connection between the steel bars and the sleeve body 1, and reduce the misalignment deviation of the steel bar connection.

[0040] Secondly, the length of the steel bar extending into the steel bar connecting sleeve is adjusted respectively. When there is a length deviation of the steel bar, the length of the steel bar can be adjusted through the straight thread section 3, which is more adaptable.

[0041] Subsequently, an annular external force is applied to the steel bar connecting sleeve to squeeze it, so that the internal threads of the steel bar connecting sleeve are pressed into the steel bars inside the steel bar connecting sleeve. The tapered thread section 2 can gradually weaken the cross section of the steel bar from the outside to the inside to adapt to the changes in the force on the steel bar, ensure the consistency of the force on the steel bar, and improve the strength of the steel bar connection.

[0042] Finally, after the steel bar connecting sleeve is extruded, since an intermediate block 4 is provided in the middle of the sleeve body 1 and elastic parts 41 are provided on both sides of the intermediate block 4, the steel bar connecting sleeve can be shaken to check the extension length of the steel bar and whether the steel bar connecting sleeve is connected in the center.

[0043] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A steel bar connecting sleeve, characterized in that: It includes a sleeve body, in which a first internal thread extending along its axial direction is provided. The first internal thread is provided with a section at each end of the sleeve body for connecting two steel bars respectively. There is a spacing between two adjacent thread teeth of each section of the first internal thread, and the minor diameter of each section of the first internal thread gradually decreases from the end of the sleeve body toward the middle of the sleeve body to form a tapered thread section, and the taper range of the tapered thread section is between 0.01-0.

02.

2. The steel bar connecting sleeve according to claim 1, characterized in that: A straight thread section is provided in the middle of the sleeve body, and the minor diameters of the internal threads of the straight thread section are equal.

3. The steel bar connection sleeve according to claim 2, characterized in that: An intermediate baffle is provided in the middle of the sleeve body, and the intermediate baffle divides the sleeve body into two connecting parts.

4. The steel bar connecting sleeve according to claim 3, characterized in that: The ends of the two connecting parts close to the middle baffle are both provided with straight thread segments, and the ratio of the axial length of the straight thread segment along the sleeve body to the axial length of the tapered thread segment along the sleeve body in each connecting part is 1:

3.

5. The steel bar connecting sleeve according to claim 3, characterized in that: Both sides of the middle baffle are provided with elastic parts which can be deformed along the axial direction of the sleeve body.

6. The steel bar connecting sleeve according to claim 3, characterized in that: A through hole is arranged in the middle of the middle baffle.

7. The steel bar connecting sleeve according to claim 1, characterized in that: The internal thread is a triangular thread.

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