High-load shockproof lock bolt sleeve

Abstract

The invention relates to the technical field of steel bar connection, in particular to a high-load shockproof lock bolt sleeve. The clamping plates are evenly arranged in the circumferential direction of the reinforcing steel bars at intervals and cover the outer sides of the axial abutting positions of the reinforcing steel bars, and the clamping plates can initially position the reinforcing steel bars and prevent displacement and shaking; the sleeve sleeves the outer side of the clamping plate and is in threaded connection with the clamping plate, and the sleeve and the clamping plate are matched to form a double-layer structure to provide stable fastening force for steel bar connection so as to cope with high-load conditions; the pair of plug covers respectively sleeve the reinforcing steel bar and are in threaded connection with the reinforcing steel bar and the sleeve, so that the clamping plate can be axially locked and prevented from loosening, meanwhile, the plug covers can effectively resist loosening or displacement during complex stress, and the stability of a connecting part is greatly improved; the elastic sleeve wraps the sleeve and the outer side of the plug cover, the protection effect is achieved, and the reliability and stability of steel bar connection in the high-load and complex stress environment are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar connection, and in particular to a high-load anti-vibration and anti-loosening bolt sleeve. Background Art

[0002] In construction projects, steel bars are the key material for building the skeleton of concrete structures. The effective connection between steel bars is crucial to ensure the integrity, strength and stability of the structure. The steel bar connection sleeve connection method has many significant advantages. It is achieved by inserting two steel bars into the two ends of the sleeve, and then using mechanical methods (such as threaded connection, extrusion connection, etc.) to tightly combine the sleeve and the steel bar. Compared with the binding connection, its connection strength is greatly improved, which can meet the requirements of various complex structures and high load conditions.

[0003] However, with the development of engineering technology, traditional bolt sleeve connections face a series of severe challenges. Under high load conditions, ordinary bolt sleeve connections are difficult to maintain a stable tightening force for a long time, and are prone to connection failure. When subjected to huge tension, pressure, shear force or the combined effect of these forces, relative slippage is likely to occur between the steel bar and the sleeve. At the same time, vibrations during construction (for example: during concrete pouring) will cause the connection parts to be continuously subjected to periodic impact forces. Ordinary bolt sleeves are very likely to loosen in such an environment, resulting in connection failure. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a high-load shock-proof and anti-loosening bolt sleeve, which solves the technical problem that under high-load conditions, the bolt sleeve connection is difficult to maintain a stable tightening force for a long time, and at the same time, the vibration during construction will cause the bolt sleeve to loosen, resulting in connection failure.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: A high-load anti-vibration and anti-loosening bolt sleeve, used for connecting two axially abutted steel bars into one, comprising: A group of clamping plates, wherein the group of clamping plates is covered on the outer side of the axial abutment of a pair of steel bars, and the group of clamping plates is evenly spaced along the circumference of the steel bars; A sleeve, which is sleeved on the outside of a group of clamping plates and is threadedly connected to the clamping plates; A pair of plug covers, wherein the pair of plug covers are respectively sleeved on a pair of steel bars, the pair of plug covers are respectively threadedly connected with the pair of steel bars, and the pair of plug covers are respectively axially opposed to the clamping plate and the sleeve; An elastic sleeve is wrapped around the outer sides of the sleeve and the plug cover.

[0006] Based on the above structure, the principle of the high-load shock-proof and loose-proof bolt sleeve is as follows: first, an elastic sleeve is put on any steel bar, a pair of plug covers are respectively put on a pair of steel bars, and a sleeve is put on any steel bar. Then, the two steel bars are axially abutted, and a group of clamps are installed on the outside of the axial abutment of the pair of steel bars, and are evenly spaced along the circumference of the steel bars. Since the sleeve is threadedly connected to the clamp, the sleeve is screwed on a group of clamps. After that, since a pair of plug covers are respectively threadedly connected to a pair of steel bars, a pair of plug covers are screwed toward each other until the ends are axially abutted against the clamps and sleeves respectively, the elastic sleeve is covered on the outside of the installation sleeve and the plug cover to complete the installation; a group of clamps can provide effective clamping force to the butt joint of the two steel bars from multiple directions, so that the two steel bars can maintain good positioning in the axial and circumferential directions. The sleeve is threadedly connected to the outside of a group of clamps, which further enhances the clamping force on the steel bar connection, making the connection tighter and effectively avoiding loose connection, thereby improving the bearing capacity of the steel bar connection. A pair of plugs are respectively connected to the steel bar threads and are in close axial contact with the clamps and sleeves, so that the steel bar connection will not loosen under vibration (for example, during concrete pouring), thereby ensuring the connection quality of the steel bar connection. The elastic sleeve not only has waterproof and anti-corrosion effects as a protective sleeve, but can also effectively resist erosion and damage to the bolt sleeve under harsh environmental conditions to ensure the connection quality of the steel bar. In addition, when the steel bar connection position is subjected to external collision or friction, the elastic sleeve can play a buffering and protective role.

[0007] Furthermore, in a high-load anti-vibration and anti-loosening bolt sleeve in the present application, a pair of mutually meshing first teeth are provided at the joint between the clamp and the steel bar, and the pair of first teeth are used to prevent the steel bar from slipping axially. As a preferred embodiment of the present application, a high-load anti-vibration and anti-loosening bolt sleeve in the present application increases the friction and mechanical bite force between the clamp and the steel bar by providing mutually meshing first teeth at the joint between the clamp and the steel bar, and the pair of mutually meshing first teeth effectively prevents the steel bar from slipping in the axial direction, thereby ensuring the firmness and reliability of the connection between the two axially abutting steel bars.

[0008] Furthermore, in the present application, a high-load anti-vibration and anti-loosening bolt sleeve has an axial length greater than the axial length of the splint, an annular accommodating cavity is formed between the sleeve and the steel bar, and the plug cover is axially provided with a convex portion corresponding to the annular accommodating cavity, the annular accommodating cavity is used to accommodate the convex portion, and the convex portion axially interferes with the splint. As a preferred embodiment of the present application, a high-load anti-vibration and anti-loosening bolt sleeve of the present application forms a nested structure when the convex portion is embedded in the annular accommodating cavity formed between the sleeve and the steel bar, and the sleeve limits the plug cover in the radial direction of the steel bar, effectively preventing the plug cover from being displaced in the radial direction of the steel bar due to external force, so as to ensure the stability of the connection between a pair of plug covers; a pair of convex portions limit the splint in the axial direction of the steel bar.

[0009] Furthermore, in the high-load anti-vibration and anti-loosening bolt sleeve of the present application, the plug cover is threadedly connected to the sleeve, the outer surface of the convex portion is provided with an external thread, and the inner wall of the annular accommodating cavity is provided with an internal thread corresponding to the external thread, and when the plug cover is installed at a preset position on the steel bar, the internal and external threads are meshed. As a preferred embodiment of the present application, in the high-load anti-vibration and anti-loosening bolt sleeve of the present application, the inner and outer sides of the plug cover are threadedly connected to the steel bar and the sleeve respectively, and such a design can tightly fix the plug cover in the accommodating cavity position of the sleeve, effectively preventing the plug cover from loosening or displacement under various complex stress conditions, and further improving the stability of the connection part.

[0010] Furthermore, in a high-load anti-vibration and anti-loosening bolt sleeve in the present application, an annular elastic gasket is provided at the axial contact point between the clamp and the protrusion, the annular elastic gasket is arranged in an annular accommodating cavity, and the annular elastic gasket is sleeved and installed on the steel bar. As a preferred embodiment of the present application, in a high-load anti-vibration and anti-loosening bolt sleeve in the present application, when the protrusion and the clamp respectively contact the two end faces of the annular elastic gasket along the axial direction of the steel bar, the annular elastic gasket is compressed due to the elasticity of the annular elastic gasket, and the annular elastic gasket produces elastic deformation, which applies a continuous reverse force to the plug cover axially, effectively preventing the plug cover from loosening, and improving the reliability of the connection. When the plug cover is screwed, the annular elastic gasket can play a buffering role between the plug cover and the clamp, which can make the pressure more evenly distributed on the connection surface, avoiding damage to the end face of the clamp caused by excessive local pressure.

[0011] Furthermore, in the present application, a high-load anti-vibration and anti-loosening bolt sleeve is provided with a second tooth portion at the end surface of the sleeve and the plug cover at the axial contact point, and a pair of the second tooth portions are meshed with each other in the radial direction of the steel bar. As a preferred embodiment of the present application, in the present application, when the plug cover is screwed to a preset position, the second tooth portions at the contact point between the sleeve and the plug cover are meshed with each other to prevent the plug cover from loosening in a vibration environment (for example, during concrete pouring) and causing connection failure. Friction and bite force are generated between the meshing second tooth portions, effectively suppressing the loosening tendency caused by vibration.

[0012] Furthermore, a high-load anti-vibration and anti-loosening bolt sleeve in the present application also includes: an annular retaining ring, the annular retaining ring is sleeved and installed on the steel bar, and a group of annular receiving cavities are provided on the inner side wall of the plug cover, a group of the annular receiving cavities are arranged at intervals along the axial direction of the plug cover, and a group of the annular receiving cavities are used to accommodate the annular retaining ring. As a preferred embodiment of the present application, a high-load anti-vibration and anti-loosening bolt sleeve in the present application, when the plug cover is tightened, the annular retaining ring will be squeezed and elastically deformed, and this deformation causes friction between the annular retaining ring and the steel bar, so that the annular retaining ring applies a continuous axial force to the steel bar, and this friction and axial force can effectively prevent the plug cover from loosening. At the same time, the annular retaining ring can fill the gap between the plug cover and the steel bar to play a sealing role and prevent the entry of liquids, gases or dust and other substances.

[0013] Furthermore, in the application, a high-load anti-vibration and anti-loosening bolt sleeve is provided with limiting protrusions at both ends of the elastic sleeve, and the limiting protrusions are arranged to extend radially inward along the steel bar, and a pair of the limiting protrusions are respectively fitted with corresponding plug covers in the axial direction of the steel bar. As a preferred solution of the application, in the application, a high-load anti-vibration and anti-loosening bolt sleeve is provided, and a pair of limiting protrusions are respectively fitted with corresponding plug covers in the axial direction of the steel bar. Since the elastic sleeve is made of elastic material, when the elastic sleeve is installed, a clear axial positioning is provided for the elastic sleeve at the connection part, ensuring the accuracy of the installation position of the elastic sleeve. At the same time, the components at the connection part can be axially gripped together to enhance the integrity of the bolt sleeve.

[0014] It can be seen from the above technical solution that the present invention has the following beneficial effects: The present invention provides a high-load shock-proof and loose-proof bolt sleeve, which realizes initial positioning of a pair of steel bars through a group of clamping plates to prevent the pair of steel bars from relative displacement or shaking after connection, thereby ensuring the stability of the connection; a group of clamping plates cooperates with the sleeve to connect the pair of steel bars as a whole, and the double-layer structure ensures a stable fastening force between the pair of clamping plates to adapt to high-load environments; then a group of clamping plates are axially locked through a pair of plug covers to prevent a group of clamping plates from loosening during use; a pair of plug covers are threadedly connected to the steel bars and the sleeve respectively, thereby effectively preventing the pair of plug covers from loosening or displacement under various complex stress conditions, thereby further improving the stability of the connection parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-load anti-vibration and anti-loosening bolt sleeve in an embodiment of the present application; Figure 2 A cross-sectional view of a high-load anti-vibration and anti-loosening bolt sleeve in an embodiment of the present application; Figure 3 This is an exploded view of a high-load anti-vibration and anti-loosening bolt sleeve in an embodiment of the present application.

[0016] In the figure: 1-rebar; 2-plywood; 3-sleeve; 30-annular accommodating chamber; 4-plug cover; 40-annular receiving chamber; 41-convex portion; 5-elastic sleeve; 51-limiting convex; 6-annular elastic gasket; 7-annular retaining ring. DETAILED DESCRIPTION

[0017] like Figure 1 , 2 As shown in 3, a high-load anti-vibration and anti-loosening bolt sleeve is used to connect two axially abutted steel bars 1 into one, comprising: A group of clamping plates 2, wherein the group of clamping plates 2 is covered on the outer side of the axial abutment of a pair of steel bars 1, and the group of clamping plates 2 is evenly spaced along the circumference of the steel bars 1; A sleeve 3, wherein the sleeve 3 is sleeved on the outside of a group of clamping plates 2, and the sleeve 3 is threadedly connected to the clamping plates 2; A pair of plug covers 4, wherein the pair of plug covers 4 are respectively sleeved on a pair of steel bars 1, the pair of plug covers 4 are respectively threadedly connected with the pair of steel bars 1, and the pair of plug covers 4 are respectively in axial conflict with the clamping plate 2 and the sleeve 3; The elastic sleeve 5 is wrapped around the outer sides of the sleeve 3 and the plug cover 4.

[0018] Based on the above structure, the principle of the high-load shock-proof and loose-proof bolt sleeve is as follows: first, the elastic sleeve 5 is sleeved on any one of the steel bars 1, a pair of plug covers 4 are respectively sleeved on a pair of steel bars 1, and the sleeve 3 is sleeved on any one of the steel bars 1. Then, the two steel bars 1 are axially abutted, and a group of clamps 2 are installed on the outside of the axial abutment of the pair of steel bars 1, and are evenly spaced along the circumference of the steel bars 1. Since the sleeve 3 is threadedly connected to the clamp 2, the sleeve 3 is screwed on a group of clamps 2. Afterwards, since a pair of plug covers 4 are respectively threadedly connected to a pair of steel bars 1, a pair of plug covers 4 are screwed toward each other until the ends are axially abutted against the clamps 2 and sleeves 3 respectively, the elastic sleeve 5 is covered on the outside of the installation sleeve 3 and the plug cover 4 to complete the installation; a group of clamps 2 can provide effective clamping force to the butt joint of the two steel bars 1 from multiple directions, so that the two steel bars 1 can be secured in the axial and circumferential directions. The sleeve 3 is threadedly connected to the outside of a group of clamps 2, further enhancing the clamping force on the connection part of the steel bar 1, making the connection tighter, effectively avoiding loose connection, and improving the bearing capacity of the connection part of the steel bar 1; a pair of plugs 4 are respectively threadedly connected to the steel bar 1 and tightly axially contact the clamps 2 and sleeves 3, so that the connection part of the steel bar 1 does not loosen under a vibration environment (for example: during concrete pouring), thereby ensuring the connection quality of the connection part of the steel bar 1; the elastic sleeve 5 is not only waterproof and anti-corrosion as a protective sleeve, but also can effectively resist the erosion and damage of the bolt sleeve under harsh environmental conditions, ensuring the connection quality of the steel bar 1, and when the connection position of the steel bar 1 is subjected to external force collision or friction, the elastic sleeve 5 can play a buffering and protective role. The number of a group of clamps 2 is 2, and the elastic sleeve 5 is a chloroprene rubber sleeve.

[0019] In this embodiment, a pair of mutually meshing first teeth are provided at the joint of the clamping plate 2 and the steel bar 1, and the pair of first teeth are used to prevent the steel bar 1 from slipping axially. By providing mutually meshing first teeth at the joint of the clamping plate 2 and the steel bar 1, the friction and mechanical bite force between the clamping plate 2 and the steel bar 1 are increased, and the pair of mutually meshing first teeth effectively prevent the steel bar 1 from slipping in the axial direction, thereby ensuring the firmness and reliability of the connection of the two axially abutting steel bars 1. Corresponding threads are provided between the clamping plate 2 and the steel bar 1.

[0020] In this embodiment, the axial length of the sleeve 3 is greater than the axial length of the clamping plate 2, and an annular accommodating cavity 30 is formed between the sleeve 3 and the steel bar 1. The plug cover 4 is axially provided with a convex portion 41 corresponding to the annular accommodating cavity 30. The annular accommodating cavity 30 is used to accommodate the convex portion 41, and the convex portion 41 axially conflicts with the clamping plate 2. When the convex portion 41 is embedded in the annular accommodating cavity 30 formed between the sleeve 3 and the steel bar 1, a nested structure is formed, and the sleeve 3 limits the plug cover 4 in the radial direction of the steel bar 1, effectively preventing the plug cover 4 from being displaced in the radial direction of the steel bar 1 due to external force, so as to ensure the stability of the connection of the pair of plug covers 4; the pair of convex portions 41 limit the clamping plate 2 in the axial direction of the steel bar 1.

[0021] In this embodiment, the plug cover 4 is threadedly connected to the sleeve 3, the outer surface of the protrusion 41 is provided with an external thread, and the inner wall of the annular accommodating cavity 30 is provided with an internal thread corresponding to the external thread. When the plug cover 4 is installed at a preset position on the steel bar 1, the internal and external threads are meshed. The inner and outer sides of the plug cover 4 are threadedly connected to the steel bar 1 and the sleeve 3 respectively. Such a design can tightly fix the plug cover 4 at the position of the accommodating cavity of the sleeve, effectively preventing the plug cover 4 from loosening or displacement under various complex stress conditions, and further improving the stability of the connection part.

[0022] In this embodiment, an annular elastic gasket 6 is provided at the axial contact point between the clamping plate 2 and the protrusion 41, and the annular elastic gasket 6 is arranged in the annular accommodating cavity 30, and the annular elastic gasket 6 is sleeved and installed on the steel bar 1. When the protrusion 41 and the clamping plate 2 respectively contact the two end surfaces of the annular elastic gasket 6 along the axial direction of the steel bar 1, the annular elastic gasket 6 is compressed due to its elasticity, and the annular elastic gasket 6 produces elastic deformation, which applies a continuous reverse force to the plug cover 4 axially, effectively preventing the plug cover 4 from loosening, improving the reliability of the connection, and when the plug cover 4 is screwed, the annular elastic gasket 6 can play a buffering role between the plug cover 4 and the clamping plate 2, so that the pressure can be more evenly distributed on the connection surface, avoiding damage to the end surface of the clamping plate 2 caused by excessive local pressure. The annular elastic gasket 6 adopts a spring gasket.

[0023] In this embodiment, the end faces of the sleeve 3 and the plug cover 4 at the axial contact point are both provided with second teeth, and a pair of the second teeth mesh with each other in the radial direction of the steel bar 1. When the plug cover 4 is screwed to a preset position, the second teeth of the sleeve 3 and the plug cover 4 at the contact point mesh with each other to prevent the plug cover 4 from loosening under a vibration environment (for example, during concrete pouring) and causing connection failure. Friction and bite force are generated between the meshing second teeth, effectively suppressing the loosening trend caused by vibration. A pair of the second teeth are arranged in an array on the sleeve 3 and the plug cover 4 along the circumference of the steel bar 1.

[0024] In this embodiment, it also includes: an annular retaining ring 7, which is sleeved and installed on the steel bar 1. A group of annular receiving cavities 40 are provided on the inner side wall of the plug cover 4. A group of annular receiving cavities 40 are arranged at intervals along the axial direction of the plug cover 4, and a group of annular receiving cavities 40 are used to accommodate the annular retaining ring 7. When the plug cover 4 is tightened, the annular retaining ring 7 will be squeezed and elastically deformed. This deformation causes friction between the annular retaining ring 7 and the steel bar 1, so that the annular retaining ring 7 applies a continuous axial force to the steel bar 1. This friction and axial force can effectively prevent the plug cover 4 from loosening. At the same time, the annular retaining ring 7 can fill the gap between the plug cover 4 and the steel bar 1, play a sealing role, and prevent the entry of liquid, gas or dust and other substances. Each plug cover 4 is provided with two annular receiving cavities 40, and correspondingly, each plug cover 4 is installed with two annular retaining rings 7; the annular retaining ring 7 is a nylon annular retaining ring.

[0025] In this embodiment, the two ends of the elastic sleeve 5 are respectively provided with limiting protrusions 51, and the limiting protrusions 51 are arranged to extend radially inwardly along the steel bar 1, and a pair of the limiting protrusions 51 are respectively fitted with the corresponding plug caps 4 in the axial direction of the steel bar 1. A pair of limiting protrusions 51 are respectively fitted with the corresponding plug caps 4 in the axial direction of the steel bar 1. Since the elastic sleeve 5 is made of elastic material, when the elastic sleeve 5 is installed, a clear axial positioning is provided for the elastic sleeve 5 at the connection part, ensuring the accuracy of the installation position of the elastic sleeve 5. At the same time, the various components at the connection part can be axially gripped together to enhance the integrity of the bolt sleeve.

[0026] The technical principles of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without creative work, and these methods will fall within the scope of protection of the present invention.

Claims

1. A high-load anti-vibration and anti-loosening bolt sleeve, used to connect two axially abutting steel bars (1) into one, characterized in that: include: A group of clamping plates (2), wherein the group of clamping plates (2) is covered on the outer sides of the axial abutment points of a pair of steel bars (1), and the group of clamping plates (2) is evenly spaced along the circumference of the steel bars (1); A sleeve (3), the sleeve (3) being sleeved on the outside of a group of clamping plates (2), the sleeve (3) being threadedly connected to the clamping plates (2); A pair of plug covers (4), the pair of plug covers (4) are respectively sleeved on a pair of steel bars (1), the pair of plug covers (4) are respectively threadedly connected to the pair of steel bars (1), and the pair of plug covers (4) are respectively axially in conflict with the clamping plate (2) and the sleeve (3); An elastic sleeve (5), wherein the elastic sleeve (5) covers the outer sides of the sleeve (3) and the plug cover (4).

2. A high-load anti-vibration and anti-loosening bolt sleeve according to claim 1, characterized in that: A pair of mutually meshing first teeth are provided at the joint between the clamping plate (2) and the steel bar (1), and the pair of first teeth are used to prevent the steel bar (1) from slipping axially.

3. A high-load anti-vibration and anti-loosening bolt sleeve according to claim 1, characterized in that: The axial length of the sleeve (3) is greater than the axial length of the clamping plate (2); an annular accommodating cavity (30) is formed between the sleeve (3) and the steel bar (1); the plug cover (4) is axially provided with a convex portion (41) corresponding to the annular accommodating cavity (30); the annular accommodating cavity (30) is used to accommodate the convex portion (41); and the convex portion (41) is axially in abutment with the clamping plate (2).

4. A high-load anti-vibration and anti-loosening bolt sleeve according to claim 3, characterized in that: The plug cover (4) is threadedly connected to the sleeve (3); an outer surface of the protrusion (41) is provided with an external thread; an inner wall of the annular accommodating cavity (30) is provided with an internal thread corresponding to the external thread; when the plug cover (4) is installed at a preset position on the steel bar (1), the internal and external threads are meshed.

5. A high-load anti-vibration and anti-loosening bolt sleeve according to claim 4, characterized in that: An annular elastic gasket (6) is provided at the axial contact point between the clamping plate (2) and the convex portion (41); the annular elastic gasket (6) is arranged in the annular accommodating cavity (30); and the annular elastic gasket (6) is sleeved and installed on the steel bar (1).

6. A high-load anti-vibration and anti-loosening bolt sleeve according to claim 1, characterized in that: The end surfaces of the sleeve (3) and the plug cover (4) at the axial contact point are both provided with second tooth portions, and a pair of the second tooth portions mesh with each other in the radial direction of the steel bar (1).

7. A high-load anti-vibration and anti-loosening bolt sleeve according to claim 1, characterized in that: Also includes: An annular retaining ring (7) is sleeved and installed on the steel bar (1); a group of annular receiving cavities (40) is provided on the inner side wall of the plug cover (4); a group of the annular receiving cavities (40) is arranged at intervals along the axial direction of the plug cover (4); and a group of the annular receiving cavities (40) is used to accommodate the annular retaining ring (7).

8. The high-load anti-vibration and anti-loosening bolt sleeve according to claim 1, characterized in that: Both ends of the elastic sleeve (5) are provided with limiting protrusions (51), the limiting protrusions (51) are arranged to extend radially inwardly along the steel bar (1), and a pair of limiting protrusions (51) are respectively fitted with corresponding plug covers (4) in the axial direction of the steel bar (1).

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