Steel bar connecting device

Abstract

The invention relates to a reinforcing steel bar connecting device, and relates to the technical field of reinforcing steel bar connecting machining. The second connecting sleeve is inserted into the steel bar end head at the other end; the outer sleeve is clamped with the second connecting sleeve, and the inner sleeve is clamped with the first connecting sleeve; when the inner sleeve is rotationally inserted into the outer sleeve, the first connecting sleeve is driven to move towards the second connecting sleeve, so that the distance between the first connecting sleeve and the second connecting sleeve is reduced, and the first connecting sleeve is matched to be inserted into the end of a reinforcing steel bar at one end; and the second connecting sleeve is connected with the steel bar end at the other end in an inserted mode, so that contact of the steel bar ends at the two ends is achieved, the requirements of the industrial standard JGJ107-2026 are met, meanwhile, the structural strength after connection is effectively improved, and the using requirements of users in different environments are met.

Description

Technical Field

[0001] This invention relates to the field of steel bar connection processing technology, and more particularly to a steel bar connection device. Background Technology

[0002] Rapid connection of reinforcing bars is a new requirement that has emerged in the construction process in recent years. Achieving rapid connection of reinforcing bars can significantly shorten the construction cycle and improve economic efficiency.

[0003] Currently, a common method for connecting reinforcing bars is the straight thread sleeve connection. The straight thread sleeve connection is a method where the reinforcing bar and the sleeve are connected by threads. Specifically, the end of the reinforcing bar is threaded to form an external thread, and the sleeve is threaded to form an internal thread. Then, the two ends of the existing straight thread sleeve are inserted into the reinforcing bar ends respectively. The threads bring the two ends of the reinforcing bar ends together, connecting them by threads. This results in a rebar with parameters that are essentially the same as a normal reinforcing bar.

[0004] In addition, industry standard JGJ107-2026 clearly stipulates that the requirements for rebar connection are that the ends of the rebars at both ends inside the sleeve are close together, and the rebars outside the sleeve on both sides must not have exposed threads.

[0005] However, with the widespread use of connecting sleeves, it has been found that existing connecting sleeves still have many defects and problems, which limit their further promotion and application: When the two ends of the straight threaded sleeve are steel bar composite structures, since the ends of the steel bars at both ends are fixed and cannot rotate, the connection process relies on the self-rotation of the straight threaded sleeve. After the straight threaded sleeve is inserted into the end of the steel bar at one end, when it is connected to the end of the steel bar at the other end in reverse, the thread of the steel bar at the initially inserted end will protrude outside the sleeve. At the same time, it is impossible to ensure that the ends of the steel bars at both ends inside the sleeve are close together, and the structural strength after connection is difficult to meet the user's requirements for use in different environments.

[0006] In conclusion, there is an urgent need for a rebar connection device to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a rebar connection device that solves the problems of existing straight thread sleeves when connecting rebar composite structures at both ends. Since the rebar ends are fixed and cannot rotate, the connection process relies on the self-rotation of the straight thread sleeve. Furthermore, when the straight thread sleeve is inserted into one rebar end and then reversed to connect to the other end, the initially inserted rebar end has exposed threads protruding outside the sleeve. Simultaneously, it cannot guarantee that the rebar ends at both ends inside the sleeve are tightly joined, resulting in a structural strength that fails to meet the user's requirements for different environments.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a rebar connection device, comprising an outer sleeve, an inner sleeve, a first connecting sleeve, and a second connecting sleeve; the first connecting sleeve is inserted into one end of a rebar; the second connecting sleeve is inserted into the other end of a rebar; the outer sleeve engages with the second connecting sleeve, and the inner sleeve engages with the first connecting sleeve; the inner sleeve is inserted into the outer sleeve to achieve the connection of the rebar ends at both ends.

[0009] The outer casing includes a first support wall, the interior of which is hollow; the first support wall has a first connecting surface and a second connecting surface at its two axial ends; the first connecting surface and the second connecting surface are annular structures; the interior of the first support wall has a first thread, a first inner wall and a second inner wall; the first thread is located at the end near the first connecting surface; the second inner wall is located at the end near the second connecting surface; the first inner wall is located between the first thread and the second inner wall; a first recess is located between the first inner wall and the second inner wall.

[0010] The first connecting sleeve is hollow inside, and has a third connecting surface and a fourth connecting surface at its two axial ends, respectively; the third connecting surface and the fourth connecting surface are annular structures, and the outer diameter of the annular structure of the third connecting surface is smaller than that of the fourth connecting surface; the first connecting sleeve has a third inner wall inside, and a second thread is provided at the end of the third inner wall near the fourth connecting surface; the first connecting sleeve has a first outer wall, a second outer wall, and a third outer wall on its outer wall; the first outer wall is located at the end near the fourth connecting surface; the third outer wall is located at the end near the third connecting surface; and the second outer wall is located between the first outer wall and the third outer wall.

[0011] The diameter of the first outer wall is larger than that of the second outer wall; the diameter of the second outer wall is larger than that of the third outer wall; a third recess is provided between the first outer wall and the second outer wall; a fourth recess is provided between the third outer wall and the second outer wall.

[0012] The second connecting sleeve is hollow inside, and a fifth connecting surface and a sixth connecting surface are respectively provided at its two ends along the axial direction; the fifth connecting surface and the sixth connecting surface are annular structures, and the outer diameter of the annular structure of the fifth connecting surface is smaller than that of the sixth connecting surface; a third thread is provided inside the second connecting sleeve; the outer wall of the second connecting sleeve is provided with a fourth outer wall, a fifth outer wall and a sixth outer wall; the fourth outer wall is provided at the end near the fifth connecting surface; the sixth outer wall is provided at the end near the sixth connecting surface; and the fifth outer wall is provided between the fourth outer wall and the sixth outer wall.

[0013] The diameter of the fourth outer wall is larger than that of the fifth outer wall; the diameter of the fifth outer wall is larger than that of the sixth outer wall; a fifth recess is provided between the fourth outer wall and the fifth outer wall; a sixth recess is provided between the sixth outer wall and the fifth outer wall.

[0014] The inner sleeve is hollow inside and has a third inner wall. A seventh connecting surface and an eighth connecting surface are respectively provided at both ends of the inner sleeve along its axial direction. The seventh and eighth connecting surfaces are annular structures. An eighth outer wall is provided on the outer side of the inner sleeve near the seventh connecting surface. A seventh outer wall is provided on the outer side of the inner sleeve near the eighth connecting surface. A fourth thread is provided on the outer wall of the seventh outer wall near the eighth outer wall. A retaining plate is provided on the outer wall of the seventh outer wall away from the eighth outer wall.

[0015] A seventh recessed platform is provided between the card platform and the seventh outer wall; an eighth recessed platform is provided between the eighth outer wall and the seventh outer wall.

[0016] In a preferred embodiment of the present invention, the inner diameter of the annular structure of the first connecting surface is larger than that of the second connecting surface.

[0017] In a preferred embodiment of the present invention, a groove is provided between the first inner wall and the first thread, and a second recess is provided between the first inner wall and the groove.

[0018] In a preferred embodiment of the present invention, the first connecting sleeve is rotatable inside the inner sleeve.

[0019] In a preferred embodiment of the present invention, the second connecting sleeve is rotatable inside the outer sleeve.

[0020] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0021] 1. The present invention discloses a rebar connection device, which comprises a first connecting sleeve for inserting into one end of a rebar; a second connecting sleeve for inserting into the other end of a rebar; an outer sleeve engaging the second connecting sleeve; and an inner sleeve engaging the first connecting sleeve. When the inner sleeve is rotated and inserted into the outer sleeve, it drives the first connecting sleeve to move toward the second connecting sleeve, thereby reducing the distance between the first and second connecting sleeves. This allows the first connecting sleeve to engage with the rebar end at one end, and the second connecting sleeve to engage with the rebar end at the other end, thus achieving contact between the rebar ends at both ends. This meets the requirements of industry standard JGJ107-2026 and effectively improves the structural strength after connection, satisfying the user's requirements in different environments.

[0022] 2. The rebar connection device disclosed in this invention features a first connecting sleeve that is rotatable inside the inner sleeve and a second connecting sleeve that is rotatable inside the outer sleeve. This allows the first and second connecting sleeves to connect to the fixed ends of the rebars, respectively. The connection of the fixed rebar ends can be achieved solely through the rotational structure within the sleeves. The device is simple in structure, low in cost, easy to assemble, and meets the requirements of mechanized large-scale factory production. It is also highly adaptable and meets the user's requirements in different environments.

[0023] 3. The rebar connection device disclosed in this invention connects the rebar ends on both sides by inserting a first connecting sleeve into one end of the rebar and a second connecting sleeve into the other end of the rebar. The connection is achieved by the contact between the first and second connecting sleeves without reversing the connection, thus avoiding exposed threads on the rebar ends protruding outside the sleeves and meeting the product qualification requirements. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a steel bar connection device according to the present invention;

[0025] Figure 2 This is a cross-sectional structural schematic diagram of the front view of a rebar connection device according to the present invention;

[0026] Figure 3 This is a three-dimensional structural diagram of the inner sleeve in a steel bar connection device according to the present invention;

[0027] Figure 4 This is a schematic diagram of the left side of the inner sleeve in a steel bar connection device according to the present invention;

[0028] Figure 5 This is a right-side structural schematic diagram of the inner sleeve in a steel bar connection device according to the present invention;

[0029] Figure 6 This is a cross-sectional structural schematic diagram of the inner sleeve in a steel bar connection device according to the present invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the second connecting sleeve in a steel bar connection device according to the present invention;

[0031] Figure 8 This is a left-side structural schematic diagram of the second connecting sleeve in a steel bar connection device according to the present invention;

[0032] Figure 9 This is a right-side structural schematic diagram of the second connecting sleeve in a steel bar connection device according to the present invention;

[0033] Figure 10 This is a cross-sectional structural schematic diagram of the front view of the second connecting sleeve in a steel bar connection device according to the present invention;

[0034] Figure 11 This is a three-dimensional structural diagram of the first connecting sleeve in a steel bar connection device of the present invention;

[0035] Figure 12 This is a left-side structural schematic diagram of the first connecting sleeve in a steel bar connection device according to the present invention;

[0036] Figure 13 This is a right-side structural schematic diagram of the first connecting sleeve in a steel bar connection device according to the present invention;

[0037] Figure 14 This is a cross-sectional structural schematic diagram of the front view of the first connecting sleeve in a steel bar connection device of the present invention;

[0038] Figure 15 This is a three-dimensional structural diagram of the outer sleeve in a steel bar connection device according to the present invention;

[0039] Figure 16 This is a schematic diagram of the left side of the outer sleeve in a steel bar connection device according to the present invention;

[0040] Figure 17 This is a right-side structural schematic diagram of the outer sleeve in a steel bar connection device according to the present invention;

[0041] Figure 18 This is a cross-sectional structural schematic diagram of the outer sleeve in a steel bar connection device according to the present invention.

[0042] In the diagram: 1. Outer sleeve; 11. First support wall; 12. First recessed platform; 13. Second recessed platform; 14. First connecting surface; 15. First inner wall; 16. First thread; 17. Second connecting surface; 18. Slot; 19. Second inner wall; 2. First connecting sleeve; 21. First outer wall; 22. Third recessed platform; 23. Second outer wall; 24. Fourth recessed platform; 25. Third outer wall; 26. Third connecting surface; 27. Second thread; 28. Third inner wall; 29. 3. Second connecting sleeve; 31. Fourth outer wall; 32. Fifth recess; 33. Fifth outer wall; 34. Sixth recess; 35. Sixth outer wall; 36. Third thread; 37. Fifth connecting surface; 38. Sixth connecting surface; 4. Inner sleeve; 41. Clamping platform; 42. Seventh outer wall; 43. Eighth outer wall; 44. Seventh recess; 45. Seventh connecting surface; 46. Fourth inner wall; 47. Fourth thread; 48. Eighth connecting surface; 49. Eighth recess. Detailed Implementation

[0043] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0044] Example 1:

[0045] A rebar connection device, please refer to Figure 1 It includes an outer sleeve 1, an inner sleeve 4, a first connecting sleeve 2, and a second connecting sleeve 3; the first connecting sleeve 2 is inserted into the end of a steel bar at one end; the second connecting sleeve 3 is inserted into the end of a steel bar at the other end; the outer sleeve 1 engages with the second connecting sleeve 3, and the first connecting sleeve 2 is rotatable inside the inner sleeve 4.

[0046] like Figure 2 As shown, the inner sleeve 4 engages with the first connecting sleeve 2, and the second connecting sleeve 3 is rotatable inside the outer sleeve 1. The inner sleeve 4 is inserted into the outer sleeve 1. When the inner sleeve 4 is rotated and inserted into the outer sleeve 1, it drives the first connecting sleeve 2 to move towards the second connecting sleeve 3, thereby reducing the distance between the first connecting sleeve 2 and the second connecting sleeve 3. This allows the first connecting sleeve 2 to insert one end of the reinforcing bar and the second connecting sleeve 3 to insert the other end of the reinforcing bar, thus achieving contact between the two ends of the reinforcing bar, meeting the requirements of industry standard JGJ107-2026. It also effectively improves the structural strength after connection, meeting the user's requirements in different environments. This application relies solely on the rotating structure inside the sleeve to connect the fixed ends of the reinforcing bar, resulting in a simple structure, low cost, and easy assembly, meeting the requirements of mechanized large-scale factory production. It also has strong adaptability, meeting the user's requirements in different environments. Furthermore, the contact between the first connecting sleeve 2 and the second connecting sleeve 3 achieves the connection of the ends of the reinforcing bars on both sides without requiring reversal, preventing exposed threads from protruding from the sleeve and meeting the product's qualification requirements.

[0047] like Figure 15-18 As shown, the main body of the outer casing 1 is a first support wall 11, and the interior of the first support wall 11 is hollow; the first support wall 11 has a first connecting surface 14 and a second connecting surface 17 respectively at its two axial ends; the first connecting surface 14 and the second connecting surface 17 are annular structures; the inner diameter of the annular structure of the first connecting surface 14 is larger than that of the second connecting surface 17.

[0048] like Figure 18As shown, the first support wall 11 is provided with a first thread 16, a first inner wall 15 and a second inner wall 19 inside; the first thread 16 is provided at one end near the first connecting surface 14; the second inner wall 19 is provided at one end near the second connecting surface 17; the first inner wall 15 is provided between the first thread 16 and the second inner wall 19; a first recess 12 is provided between the first inner wall 15 and the second inner wall 19.

[0049] like Figure 18 As shown, a groove 18 is provided between the first inner wall 15 and the first thread 16, and a second recess 13 is provided between the first inner wall 15 and the groove 18.

[0050] like Figure 11-14 As shown, the first connecting sleeve 2 is hollow inside, and a third connecting surface 26 and a fourth connecting surface 29 are respectively provided at its two axial ends; the third connecting surface 26 and the fourth connecting surface 29 are annular structures, and the outer diameter of the annular structure of the third connecting surface 26 is smaller than that of the fourth connecting surface 29; the first connecting sleeve 2 is provided with a third inner wall 28 inside, and a second thread 27 is provided at the end of the third inner wall 28 near the fourth connecting surface 29; the outer wall of the first connecting sleeve 2 is provided with a first outer wall 21, a second outer wall 23 and a third outer wall 25; the first outer wall 21 is located at the end near the fourth connecting surface 29; the third outer wall 25 is located at the end near the third connecting surface 26; and the second outer wall 23 is located between the first outer wall 21 and the third outer wall 25.

[0051] like Figure 14 As shown, the diameter of the first outer wall 21 is larger than that of the second outer wall 23; the diameter of the second outer wall 23 is larger than that of the third outer wall 25; a third recess 22 is provided between the first outer wall 21 and the second outer wall 23; and a fourth recess 24 is provided between the third outer wall 25 and the second outer wall 23.

[0052] like Figure 7-10 As shown, the second connecting sleeve 3 is hollow inside, and a fifth connecting surface 37 and a sixth connecting surface 38 are respectively provided at its two axial ends; the fifth connecting surface 37 and the sixth connecting surface 38 are annular structures, and the outer diameter of the annular structure of the fifth connecting surface 37 is smaller than that of the sixth connecting surface 38; a third thread 36 is provided inside the second connecting sleeve 3; the outer wall of the second connecting sleeve 3 is provided with a fourth outer wall 31, a fifth outer wall 33 and a sixth outer wall 35; the fourth outer wall 31 is provided at the end near the fifth connecting surface 37; the sixth outer wall 35 is provided at the end near the sixth connecting surface 38; and the fifth outer wall 33 is provided between the fourth outer wall 31 and the sixth outer wall 35.

[0053] like Figure 10 As shown, the diameter of the fourth outer wall 31 is larger than that of the fifth outer wall 33; the diameter of the fifth outer wall 33 is larger than that of the sixth outer wall 35; a fifth recess 32 is provided between the fourth outer wall 31 and the fifth outer wall 33; and a sixth recess 34 is provided between the sixth outer wall 35 and the fifth outer wall 33.

[0054] like Figure 3-6 As shown, the inner sleeve 4 is hollow inside, and has a fourth inner wall 46. The inner sleeve 4 has a seventh connecting surface 45 and an eighth connecting surface 48 at its two axial ends, respectively. The seventh connecting surface 45 and the eighth connecting surface 48 are annular structures. An eighth outer wall 43 is provided on the outer side of the inner sleeve 4 near the seventh connecting surface 45. A seventh outer wall 42 is provided on the outer side of the inner sleeve 4 near the eighth connecting surface 48. A fourth thread 47 is provided on the outer wall of the seventh outer wall 42 near the eighth outer wall 43. A retaining plate 41 is provided on the outer wall of the seventh outer wall 42 away from the eighth outer wall 43.

[0055] like Figure 6 As shown, a seventh recessed platform 44 is provided between the card platform 41 and the seventh outer wall 42; an eighth recessed platform 49 is provided between the eighth outer wall 43 and the seventh outer wall 42.

[0056] The present invention discloses a rebar connection device. It should be noted that, herein, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel bar connection device, characterized in that, It includes an outer sleeve (1), an inner sleeve (4), a first connecting sleeve (2), and a second connecting sleeve (3); the first connecting sleeve (2) is inserted into the end of the reinforcing bar at one end; the second connecting sleeve (3) is inserted into the end of the reinforcing bar at the other end; the outer sleeve (1) engages with the second connecting sleeve (3), and the inner sleeve (4) engages with the first connecting sleeve (2); the inner sleeve (4) is inserted into the outer sleeve (1) to achieve the connection of the ends of the reinforcing bars at both ends.

2. The steel bar connection device according to claim 1, characterized in that: The first connecting sleeve (2) is rotatable inside the inner sleeve (4).

3. A steel bar connection device according to claim 2, characterized in that: The second connecting sleeve (3) is rotatable inside the outer sleeve (1).

4. A steel bar connection device according to claim 3, characterized in that: The outer casing (1) includes a first support wall (11), the interior of which is hollow; a first connecting surface (14) and a second connecting surface (17) are respectively provided at both ends of the first support wall (11) in the axial direction; the first connecting surface (14) and the second connecting surface (17) are annular structures; the interior of the first support wall (11) is provided with a first thread (16), a first inner wall (15) and a second inner wall (19); the first thread (16) is provided at one end near the first connecting surface (14); the second inner wall (19) is provided at one end near the second connecting surface (17); the first inner wall (15) is provided between the first thread (16) and the second inner wall (19); a first recess (12) is provided between the first inner wall (15) and the second inner wall (19).

5. A steel bar connection device according to claim 3, characterized in that: The first connecting sleeve (2) is hollow inside, and a third connecting surface (26) and a fourth connecting surface (29) are respectively provided at both ends of the axial direction; the third connecting surface (26) and the fourth connecting surface (29) are annular structures, and the outer diameter of the annular structure of the third connecting surface (26) is smaller than that of the fourth connecting surface (29); the first connecting sleeve (2) is provided with a third inner wall (28), and a second thread (27) is provided at the end of the third inner wall (28) near the fourth connecting surface (29); the outer wall of the first connecting sleeve (2) is provided with a first outer wall (21), a second outer wall (23) and a third outer wall (25); the first outer wall (21) is provided at the end near the fourth connecting surface (29); the third outer wall (25) is provided at the end near the third connecting surface (26); the second outer wall (23) is provided between the first outer wall (21) and the third outer wall (25).

6. A steel bar connection device according to claim 5, characterized in that: The diameter of the first outer wall (21) is greater than that of the second outer wall (23); the diameter of the second outer wall (23) is greater than that of the third outer wall (25); a third recess (22) is provided between the first outer wall (21) and the second outer wall (23); a fourth recess (24) is provided between the third outer wall (25) and the second outer wall (23).

7. A steel bar connection device according to claim 3, characterized in that: The second connecting sleeve (3) is hollow inside, and a fifth connecting surface (37) and a sixth connecting surface (38) are respectively provided at both ends of the axial direction; the fifth connecting surface (37) and the sixth connecting surface (38) are annular structures, and the outer diameter of the annular structure of the fifth connecting surface (37) is smaller than that of the sixth connecting surface (38); a third thread (36) is provided inside the second connecting sleeve (3); the outer wall of the second connecting sleeve (3) is provided with a fourth outer wall (31), a fifth outer wall (33) and a sixth outer wall (35); the fourth outer wall (31) is provided at one end close to the fifth connecting surface (37); the sixth outer wall (35) is provided at one end close to the sixth connecting surface (38); the fifth outer wall (33) is provided between the fourth outer wall (31) and the sixth outer wall (35).

8. A steel bar connection device according to claim 7, characterized in that: The diameter of the fourth outer wall (31) is larger than that of the fifth outer wall (33); the diameter of the fifth outer wall (33) is larger than that of the sixth outer wall (35); a fifth recess (32) is provided between the fourth outer wall (31) and the fifth outer wall (33); a sixth recess (34) is provided between the sixth outer wall (35) and the fifth outer wall (33).

9. A steel bar connection device according to claim 3, characterized in that: The inner sleeve (4) is hollow inside and has a fourth inner wall (46) inside. The inner sleeve (4) has a seventh connecting surface (45) and an eighth connecting surface (48) at its two axial ends respectively. The seventh connecting surface (45) and the eighth connecting surface (48) are annular structures. The outer side of the inner sleeve (4) near the seventh connecting surface (45) has an eighth outer wall (43). The outer side of the inner sleeve (4) near the eighth connecting surface (48) has a seventh outer wall (42). The outer wall of the seventh outer wall (42) near the eighth outer wall (43) has a fourth thread (47). The outer wall of the seventh outer wall (42) away from the eighth outer wall (43) has a locking platform (41).

10. A steel bar connection device according to claim 1, characterized in that: The inner diameter of the annular structure of the first connecting surface (14) is larger than that of the second connecting surface (17).

Images