Adjustable sleeve capable of quickly connecting and centering reinforcing steel bars

Abstract

The utility model provides an adjustable sleeve capable of quickly connecting reinforcing steel bars and centering. The adjustable sleeve comprises a first sleeve body, a male head double nipple, a female head double nipple, a second sleeve body, a split sleeve body, two lock nuts and two taper sleeves. One end of the first sleeve and one end of the second sleeve are provided with straight holes used for being connected with reinforcing steel bars in an extruding mode, and the other end of the first sleeve and the other end of the second sleeve are provided with internal threaded holes used for being connected with one end of the male head double nipple and one end of the female head double nipple respectively. A conical centering raised head and a circular-truncated-cone-shaped centering groove are formed in the center of the side face of the other end of the male head double nipple and the center of the side face of the other end of the female head double nipple, and when two steel bars are connected, the centering raised head is inserted into the centering groove; the two ends of the outer portion of the split sleeve are provided with self-locking outer conical surfaces respectively, and the two taper sleeves are provided with self-locking inner conical surfaces matched with the two self-locking outer conical surfaces respectively and used for extruding and locking the two ends of the split sleeve. The device can be used for the working condition that a certain adjustable range exists in the axial direction when two steel bars are connected, and can also be used for modularized connection of the steel bars.

Description

Technical Field

[0001] The utility model relates to the technical field of building steel bar connection, in particular to an adjustable sleeve capable of quickly connecting steel bars and centering them. Background Art

[0002] At present, in the production fields such as building and nuclear power engineering, the main solutions for adjustable mechanical connection sleeves of steel bars include taper sleeve locking, grouting sleeve, cold extrusion sleeve and straight thread combined adjustable sleeve. However, these sleeves have disadvantages such as low installation efficiency or inability to center during installation. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an adjustable sleeve capable of quickly connecting steel bars and centering them in view of the deficiencies of the prior art.

[0004] To solve the above technical problem, the content of the utility model includes:

[0005] An adjustable sleeve capable of quickly connecting steel bars and centering them, comprising a first sleeve, a male head screw, a female head screw, a second sleeve, a split sleeve, two lock nuts and two taper sleeves; one end of the first sleeve has a straight hole for extrusion connection with a steel bar, and the other end of the first sleeve has an internal thread hole for connection with one end of the male head screw; one end of the second sleeve has a straight hole for extrusion connection with another steel bar, and the other end of the second sleeve has an internal thread hole for connection with one end of the female head screw; a conical centering projection is fixedly arranged at the center of the side of the other end of the male head screw, and a frustum-shaped centering groove is formed at the center of the side of the other end of the female head screw. When connecting two steel bars, the centering projection of the male head screw is inserted into the centering groove of the female head screw; the two lock nuts are respectively used to lock the connections of the male head screw and the female head screw with the first sleeve and the second sleeve; the split sleeve has internal threads, and the two outer ends of the split sleeve respectively have self-locking outer conical surfaces, and the two taper sleeves respectively have self-locking inner conical surfaces adapted to the two self-locking outer conical surfaces; the split sleeve is used to buckle to the joint of the male head screw and the female head screw after centering, and the two taper sleeves are respectively used to squeeze and lock the two ends of the split sleeve.

[0006] Further, the first sleeve is a standard sleeve, and the second sleeve is an extended sleeve with an extended internal thread.

[0007] Further, the diameter of the male head screw is equal to the diameter of the female head screw.

[0008] Further, the bottom diameter of the centering projection is smaller than the diameter of the male head screw; the bottom diameter of the centering groove is smaller than the diameter of the female head screw.

[0009] Furthermore, the bottom diameter of the centering projection is equal to the lower bottom diameter of the centering groove, and the height of the centering projection is less than or equal to the depth of the centering groove.

[0010] Furthermore, the split sleeve is of a two-piece structure.

[0011] Furthermore, the centering projection and the male threaded coupling are of an integral structure.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The adjustable sleeve provided by the present utility model, which can be quickly connected and can adjust the center of the steel bars, can be used in working conditions where there is a certain adjustable range in the axial direction of two steel bars during steel bar connection, and can also be used for modular connection of steel bars. The adjustable sleeve includes a first sleeve, a male threaded coupling, a female threaded coupling, a second sleeve, a split sleeve, two lock nuts and two tapered sleeves; one ends of the first sleeve and the second sleeve both have straight holes for respectively extruding and connecting with two steel bars, and the other ends of them both have internal threaded holes for respectively screwing into one ends of the male threaded coupling and the female threaded coupling, and the length of the internal threaded end of the second sleeve is greater than that of the internal threaded end of the first sleeve; at the centers of the side surfaces of the other ends of the male threaded coupling and the female threaded coupling, there are respectively provided a conical centering projection and a frustum-shaped centering groove which are adapted to each other. When connecting the two steel bars, the female threaded coupling is screwed out from the second sleeve towards the male threaded coupling, so that the centering projection is inserted into the centering groove; the split sleeve is used for buckling to the joint of the centered male threaded coupling and female threaded coupling, and the two tapered sleeves are respectively used for squeezing and locking the two ends of the split sleeve. Description of the Drawings

[0014] Figure 1 is the assembled structural schematic diagram of the present utility model;

[0015] Figure 2 is the structural schematic diagram of the first sleeve;

[0016] Figure 3 is the structural schematic diagram of the second sleeve;

[0017] Figure 4 is the structural schematic diagram of the male threaded coupling;

[0018] Figure 5 is the structural schematic diagram of the female threaded coupling;

[0019] Figure 6 is the structural schematic diagram of the lock nut;

[0020] Figure 7 is the structural schematic diagram of the tapered sleeve;

[0021] Figure 8 is the structural schematic diagram of the split sleeve;

[0022] Figure 9 It is a schematic diagram of the installation process of the present utility model;

[0023] In the figure: 1. The first sleeve, 2. The male threaded coupling, 3. The female threaded coupling, 4. The second sleeve, 5. The lock nut, 6. The tapered sleeve, 7. The split sleeve, 8. The centering projection, 9. The centering groove. Specific embodiments

[0024] To facilitate the understanding of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art should understand that the described embodiments are only for helping to understand the present utility model and should not be regarded as specific limitations on the present utility model.

[0025] As Figures 1-8 shown, the present utility model provides an adjustable sleeve that can be quickly connected and can adjust the center of the steel bar, including a first sleeve 1, a male threaded coupling 2, a female threaded coupling 3, a second sleeve 4, a split sleeve 7, two lock nuts 5 and two tapered sleeves 6; one end of the first sleeve 1 has a straight hole for extrusion connection with a steel bar, and the other end of the first sleeve 1 has an internal threaded hole for connection with one end of the male threaded coupling 2; one end of the second sleeve 4 has a straight hole for extrusion connection with another steel bar, and the other end of the second sleeve 4 has an internal threaded hole for connection with one end of the female threaded coupling 3; a conical centering projection 8 is fixedly arranged at the center of the side of the other end of the male threaded coupling 2, and the centering projection 8 and the male threaded coupling 2 are of an integral structure. A frustum-shaped centering groove 9 is formed at the center of the side of the other end of the female threaded coupling 3, and the centering groove 9 is larger on the outside and smaller on the inside. When connecting two steel bars, the centering projection 8 of the male threaded coupling 2 is inserted into the centering groove 9 of the female threaded coupling 3; the two lock nuts 5 are respectively used to lock the connections of the male threaded coupling 2 and the female threaded coupling 3 with the first sleeve 1 and the second sleeve 4; the split sleeve 7 has internal threads, and the two ends of the outside of the split sleeve 7 respectively have self-locking outer conical surfaces, and the two tapered sleeves 6 respectively have self-locking inner conical surfaces adapted to these two self-locking outer conical surfaces; the split sleeve 7 is used to buckle to the joint of the male threaded coupling 2 and the female threaded coupling 3 after centering, and the two tapered sleeves 6 are respectively used to squeeze and lock the two ends of the split sleeve 7.

[0026] The outer shapes of the first sleeve 1 and the second sleeve 4 are both stepped cylindrical. The outer shape of the lock nut 5 is a regular polygon, which is used to eliminate the thread clearance between the sleeve and the threaded coupling; the outer shape of the tapered sleeve 6 is cylindrical, and the lock nut 5 can pass through the tapered sleeve 6.

[0027] The first sleeve 1 is a standard sleeve, and the second sleeve 4 is an extended sleeve with an extended internal thread relative to the standard sleeve. During installation, one end of the male threaded coupling 2 is screwed into the internal threaded hole of the first sleeve 1 and locked with a lock nut 5. At the same time, one end of the female threaded coupling 3 is screwed into the internal threaded hole of the second sleeve 4, and another lock nut 5 is not used for locking first. Next, the female threaded coupling 3 needs to be screwed out in the direction of the male threaded coupling 2 so that the centering convex head 8 is inserted into the centering groove 9. After the male threaded coupling 2 and the female threaded coupling 3 are centered, another lock nut 5 is used to lock the female threaded coupling 3.

[0028] The diameter of the male threaded coupling 2 is equal to the diameter of the female threaded coupling 3. The bottom diameter of the centering convex head 8 is smaller than the diameter of the male threaded coupling 2; the bottom diameter of the centering groove 9 is smaller than the diameter of the female threaded coupling 3. The bottom diameter of the centering convex head 8 is equal to the bottom diameter of the centering groove 9, and the height of the centering convex head 8 is less than or equal to the depth of the centering groove 9. The split sleeve 7 is of a two-piece structure. After the male threaded coupling 2 and the female threaded coupling 3 are centered and locked, the split sleeve 7 is centered and buckled onto the joint of the centered male threaded coupling 2 and female threaded coupling 3.

[0029] As Figure 9 shown, the installation steps of the present utility model are as follows:

[0030] (a) First, insert two steel bars into the straight hole ends of the first sleeve 1 and the first sleeve 4 respectively, and perform extrusion installation through a swaging machine. Then, screw the male threaded coupling 2 and the female threaded coupling 3 into the internal threaded hole ends of the first sleeve 1 and the second sleeve 4 respectively. Next, screw two lock nuts 5 onto the male threaded coupling 2 and the female threaded coupling 3 respectively, and put two tapered sleeves 6 onto the first sleeve 1 and the second sleeve 4 respectively. Finally, position the above-installed steel bars, and the axial distance between the end faces of the male threaded coupling 2 and the female threaded coupling 3 ≤ adjustable range d;

[0031] (b) Screw the female threaded coupling 3 out of the second sleeve 4 in the direction of the male threaded coupling 2 until the centering convex head 8 is inserted into the centering groove 9, and the end faces of the male threaded coupling 2 and the female threaded coupling 3 are in contact to center them;

[0032] (c) Center and buckle the split sleeve 7 onto the joint of the male threaded coupling 2 and the female threaded coupling 3;

[0033] (d) Put two tapered sleeves 6 onto both ends of the split sleeve 7 respectively, and perform axial extrusion using a portable swaging pliers.

[0034] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable sleeve for quick connection and centering of steel bars, characterized in that: The invention comprises a first sleeve (1), a male thread (2), a female thread (3), a second sleeve (4), a split sleeve (7), two lock nuts (5) and two tapered sleeves (6); one end of the first sleeve (1) has a straight hole for being extruded and connected to a steel bar, and the other end of the first sleeve (1) has an internal threaded hole for being connected to one end of the male thread (2); one end of the second sleeve (4) has a straight hole for being extruded and connected to another steel bar, and the other end of the second sleeve (4) has an internal threaded hole for being connected to one end of the female thread (3); a conical centering protrusion (8) is fixedly provided at the center of the side surface of the other end of the male thread (2), and a conical centering protrusion (8) is fixedly provided at the center of the side surface of the other end of the female thread (3). A truncated cone-shaped centering groove (9) is provided. When two steel bars are connected, the centering protrusion (8) of the male thread (2) is inserted into the centering groove (9) of the female thread (3); two lock nuts (5) are respectively used to lock the connection between the male thread (2) and the female thread (3) and the first sleeve (1) and the second sleeve (4) respectively; the split sleeve (7) has an internal thread, and the two ends of the outer side of the split sleeve (7) respectively have self-locking outer conical surfaces, and the two conical sleeves (6) respectively have self-locking inner conical surfaces matched with the two self-locking outer conical surfaces; the split sleeve (7) is used to buckle into the joint of the male thread (2) and the female thread (3) after centering, and the two conical sleeves (6) are respectively used to squeeze and lock the two ends of the split sleeve (7).

2. The adjustable sleeve for quick connection and centering of steel bars according to claim 1, characterized in that: The first sleeve (1) is a standard sleeve, and the second sleeve (4) is an extended sleeve with an extended internal thread.

3. The adjustable sleeve for quick connection and centering of steel bars according to claim 1, characterized in that: The diameter of the male end thread (2) is equal to the diameter of the female end thread (3).

4. The adjustable sleeve for quick connection and centering of steel bars according to claim 3, characterized in that: The bottom surface diameter of the centering protrusion (8) is smaller than the diameter of the male thread (2); and the bottom surface diameter of the centering groove (9) is smaller than the diameter of the female thread (3).

5. The adjustable sleeve for quick connection and centering of steel bars according to claim 4, characterized in that: The bottom diameter of the centering protrusion (8) is equal to the bottom diameter of the centering groove (9), and the height of the centering protrusion (8) is less than or equal to the depth of the centering groove (9).

6. The adjustable sleeve for quick connection and centering of steel bars according to claim 1, characterized in that: The split sleeve (7) is a two-petal structure.

7. The adjustable sleeve for quick connection and centering of steel bars according to claim 1, characterized in that: The centering protrusion (8) and the male thread (2) are an integral structure.

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