Rebar quick coupling sleeve and processing method thereof

Abstract

The application relates to a reinforcing steel bar quick connecting sleeve and a processing method thereof, which comprises a sleeve, a connecting screw rod and a fixing sleeve. The connecting screw rod is screw-connected in the inside of the sleeve. Two fixing sleeves are respectively arranged on the two sides of the connecting screw rod and in the inside of the sleeve. The sleeve is composed of a taper section and a horizontal section. The inside of the horizontal section is provided with internal threads. The section of the connecting screw rod is in an I-shaped structure. The outer diameter of the connecting screw rod is provided with external threads matched with the sleeve. The two ends of the connecting screw rod are provided with blind holes. A limiting platform is arranged between the blind holes. The fixing sleeve is provided with internal and external tapers, is provided with four grooves, one of which is open, and is provided with internal threads. The application has the advantages of reliable joint performance, stable quality, no influence of climate and technical level of operating personnel, fast connecting speed, safety and the like. The application can obviously reduce the operating cycle, improve the operating environment, greatly reduce the operating cost, improve the work efficiency and has no environmental pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical connection of steel bars, in particular to a steel bar quick connection sleeve and a processing method thereof. BACKGROUND

[0002] The point welding connection method used for long-term in China's building steel bars cannot be used for large-scale and large-specification steel bar connection with the vigorous development of China's infrastructure construction. In addition, welding produces harmful gases, requires welding lines, various atmospheres, and has many shortcomings and safety hazards. There are also quality problems such as virtual welding, missed welding, and welding stress. Although in recent years, through the continuous introduction of advanced mechanical connection technology from abroad, combined with the continuous efforts of relevant experts in some scientific research institutions in China, the mechanical connection technology of steel bars in China has developed rapidly. Many sleeve cold extrusion, tapered thread, upset straight thread, rolling straight thread, grouting method, and tapered pipe connection methods have emerged. The more advanced methods than welding mainly include thread connection method, extrusion connection method, grouting method, and tapered pipe quick connection method.

[0003] Compared with the traditional point welding connection, the above methods have the advantages of reliable joint performance, stable quality, no influence of welder's technical level, fast connection speed, no open flame, reliable connection of weldable and non-weldable steel bars, etc.

[0004] However, there are still the following defects: the thread connection method needs to pre-process the thread on both ends of the steel bar, and needs to be twisted for assembly during installation, which requires special thread processing equipment, gauges, and installation equipment; when the thread does not rotate in, it needs to be re-toothed, which increases the processing difficulty, reduces the production efficiency, and increases the technical requirements and assembly difficulty of personnel; the extrusion connection method needs to use extrusion equipment, the operation tool is heavy, and needs to be connected with a gas pipe, which increases the moving difficulty and is very inconvenient for higher occasions, which increases the labor intensity of workers and reduces the production efficiency; the grouting method needs to be filled with concrete into the internal space at the later stage, and after drying, the concrete generated by the inclined hole of the sleeve pipe and the edge of the steel bar achieves the purpose of limiting, but its structure is complex, the volume is too large due to the need for a large internal space for grouting, the gap caused by the shrinkage of the dried concrete is large, which causes high cost and low applicability; the tapered pipe quick connection method appeared in recent years, which is a steel bar connection sleeve with a taper, which achieves the functions of quick connection and fastening of the steel bar through the action of the three claws with the inclined tooth and the front end of the sleeve pipe, but in order to achieve the functions of quick connection and fastening, it needs to solve the problems of three claw fixing, radial adjustment, axial displacement, etc., which causes the defects of complex structure, too many parts, large volume, heavy quality, high manufacturing and transportation costs, etc.

[0005] As a capital construction country, the use of steel bar is very frequent, and the amount is huge. In recent years, with the increasing of ecological protection in China, the requirements for the manufacture and use of materials are more energy-saving and cost-reducing, and it is urgent to provide a steel bar fast connecting method with fast connection, simple operation, light quality, beautiful appearance and low price. SUMMARY

[0006] The steel bar fast connecting sleeve and the processing method thereof have the advantages of simple structure, reasonable design and convenient use.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: it comprises a sleeve, a connecting screw rod and two fixing sleeves; the connecting screw rod is threadedly connected in the inside of the sleeve; the two fixing sleeves are arranged on the two sides of the connecting screw rod and on the inside of the sleeve; the sleeve comprises a left sleeve and a right sleeve which are symmetrical to each other; the left sleeve and the right sleeve are both composed of a tapered section and a horizontal section; the diameter of the tapered section gradually increases from the starting end to the horizontal section; the inside of the horizontal section is provided with internal threads; the cross section of the connecting screw rod is in the shape of an I-beam; the outer diameter of the connecting screw rod is provided with external threads which are matched with the internal threads of the sleeve; the two ends of the connecting screw rod are both provided with blind holes; a limiting platform is arranged between the two blind holes; the fixing sleeve is provided with internal and external tapers, and four grooves are formed in the fixing sleeve, one of which is open; the inside of the fixing sleeve is provided with tooth traces;

[0008] Further, the sleeve is made of carbon steel or adjustable quality alloy steel; the taper of the tapered section of the sleeve is 6°-10°;

[0009] Further, the internal threads of the inside of the horizontal section of the sleeve and the external threads on the outer diameter of the connecting screw rod are both fine tooth traces;

[0010] Further, the depth of the blind hole on the connecting screw rod is greater than or equal to twice the pitch of the blade of the steel bar;

[0011] Further, the internal and external tapers of the fixing sleeve are not parallel, the external taper is large, and the internal taper is small; the minimum size of the opening of the four grooves is greater than the width size of the straight blade of the steel bar; the tooth trace on the inside is a bevel gear type screw trace or a ring groove straight tooth trace;

[0012] Further, the processing method of the sleeve comprises the following steps: one, blanking; two, hot extrusion forming; three, tapping; four, heat treatment;

[0013] Further, the processing method of the connecting screw rod comprises the following steps: one, cold upsetting forming; two, wire drawing forming; three, heat treatment;

[0014] Further, the processing method of the fixing sleeve comprises the following steps: one, feeding of coiled material; two, shaping; three, tooth trace pressing; four, grooving; five, blanking; six, coiling and shaping;

[0015] Further, the tensile strength of the outer sleeve and the inner and outer threads after heat treatment is higher than the tensile strength requirement of the reinforcing steel.

[0016] The quick connecting method of the application is that, in the process of aligning the reinforcing steel with the outer sleeve by artificial assistance, the reinforcing steel is slightly rotated to align with the fixed slot, and then directly inserted to complete the butt joint.

[0017] After the above scheme is adopted, the application has the following advantages:

[0018] 1. The joint has reliable performance, stable quality, is not affected by the weather and the technical level of the operator, has fast connection speed, is safe, does not need other tools and equipment, and is suitable for various occasions.

[0019] 2. The joint has simple structure, high quality and low price, and fast and reliable installation.

[0020] 3. The joint can significantly reduce the operation cycle, improve the dependence on the operation environment, greatly reduce the operation cost, improve the work efficiency, and has no environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0022] Fig. 1 is the overall schematic diagram of the application;

[0023] Fig. 2 is the structural schematic diagram of the application;

[0024] Fig. 3 is the structural schematic diagram of the connecting screw.

[0025] Explanation of reference signs:

[0026] 1. Reinforcing steel; 2. Outer sleeve; 3. Connecting screw; 4. Fixed sleeve; 3-1. Blind hole; 3-2. Outer thread; 3-3. Limiting table. DETAILED DESCRIPTION

[0027] The application will be further described below with reference to the drawings.

[0028] Reference Figs. 1-3The technical scheme adopted by the embodiment is shown as follows: it comprises a sleeve 2, a connecting screw rod 3, and a fixing sleeve 4; the connecting screw rod 3 is threadedly connected in the inside of the sleeve 2; the number of the fixing sleeves 4 is two; the two fixing sleeves 4 are respectively arranged on the two sides of the connecting screw rod 3 and on the inside of the sleeve 2; the sleeve 2 comprises a left sleeve and a right sleeve which are symmetrical to each other; the left sleeve and the right sleeve are both composed of a tapered section and a horizontal section; the diameter of the tapered section gradually increases from the starting end to the horizontal section; the inside of the horizontal section is provided with an internal thread; the cross section of the connecting screw rod 3 is in the shape of an I-beam; the outer diameter of the connecting screw rod 3 is provided with an external thread 3-2 which is matched with the internal thread of the sleeve; the two ends of the connecting screw rod 3 are both provided with blind holes 3-1; a limiting platform 3-3 is arranged between the two blind holes 3-1; the fixing sleeve 4 is provided with internal and external tapers, and four grooves are formed in the fixing sleeve 4, one of which is open; the inside of the fixing sleeve 4 is provided with a tooth trace.

[0029] The sleeve 2 is made of carbon steel or adjustable alloy steel, and the processing method comprises the following steps: one, blanking; two, hot extrusion forming; three, tapping; four, heat treatment; the sleeve 2 mainly plays a role in stabilizing the steel bar 1 to prevent shaking and limiting the fixing sleeve 4; the sleeve 2 is provided with a significant taper structure, and is threadedly connected with the connecting screw rod 3; the taper of the tapered section of the sleeve 2 is 6°-10°

[0030] The connecting screw rod 3 mainly plays a role in connecting the left sleeve and the right sleeve and limiting the fixing sleeve 4 and the steel bar 1, and the processing method comprises the following steps: one, cold heading forming; two, wire drawing forming; three, heat treatment; the connecting screw rod 3 is provided with an external thread 3-2 which is matched with the sleeve 2; the internal thread of the inside of the horizontal section of the sleeve 2 and the external thread 3-2 on the outer diameter of the connecting screw rod 3 are both in the shape of a fine tooth trace; the two ends of the connecting screw rod 3 are provided with blind holes 3-1 with a maximum outer diameter of the steel bar, and a limiting platform 3-3 is arranged between the blind holes 3-1; the depth of the blind holes 3-1 is greater than or equal to twice the pitch of the steel bar;

[0031] The fixing sleeve mainly plays a role in fixing the steel bar 1 and limiting the steel bar 1 from coming out through the cooperation with the sleeve 2, and the processing method comprises the following steps: one, feeding of coiled material; two, shaping; three, tooth trace pressing; four, groove forming; five, blanking; six, coiling; the internal and external tapers of the fixing sleeve 4 are not parallel, the external taper is large, and the internal taper is small; the minimum size of the opening of the four grooves is greater than the size of the straight blade width of the steel bar; the tooth trace on the inside of the fixing sleeve 4 is in the shape of a bevel gear trace or a ring groove straight trace.

[0032] The reinforcing steel bar fast connection sleeve of the present application is assembled as follows: when the sleeve 2 is put into the reinforcing steel bar 1, the one end of the sleeve 2 is directly aligned with the reinforcing steel bar 1 and pressed down by artificial, the fixed sleeve 4 inside the sleeve 2 is opened by the entering force of the reinforcing steel bar 1 to make the reinforcing steel bar 1 pass through, until the reinforcing steel bar 1 contacts with the limiting surface of the limiting platform 3-3 on the connecting screw 3, and the reinforcing steel bar 1 is assembled at one end; at the other end, when the reinforcing steel bar 1 is put into the sleeve 2, the one end of the reinforcing steel bar 1 is aligned with the mouth of the sleeve 2 and pressed down by the weight of the reinforcing steel bar 1 (by artificial when the reinforcing steel bar 1 is installed in parallel or in other ways), the reinforcing steel bar 1 is extruded and opened by the fixed sleeve 4 to make the reinforcing steel bar pass through, until the reinforcing steel bar 1 reaches the limiting surface of the limiting platform 3-3 on the connecting screw 3, and the reinforcing steel bar 1 is assembled.

[0033] The reinforcing steel bar fast connection sleeve of the present application is assembled as follows: when the sleeve 2 is put into the reinforcing steel bar 1, the one end of the sleeve 2 is directly aligned with the reinforcing steel bar 1 and pressed down by artificial, the fixed sleeve 4 inside the sleeve 2 is opened by the entering force of the reinforcing steel bar 1 to make the reinforcing steel bar 1 pass through, until the reinforcing steel bar 1 contacts with the limiting surface of the limiting platform 3-3 on the connecting screw 3, and the reinforcing steel bar 1 is assembled at one end; at the other end, when the reinforcing steel bar 1 is put into the sleeve 2, the one end of the reinforcing steel bar 1 is aligned with the mouth of the sleeve 2 and pressed down by the weight of the reinforcing steel bar 1 (by artificial when the reinforcing steel bar 1 is installed in parallel or in other ways), the reinforcing steel bar 1 is extruded and opened by the fixed sleeve 4 to make the reinforcing steel bar pass through, until the reinforcing steel bar 1 reaches the limiting surface of the limiting platform 3-3 on the connecting screw 3, and the reinforcing steel bar 1 is assembled.

[0034] The reinforcing steel bar fast connection sleeve of the present application is assembled as follows: when the sleeve 2 is put into the reinforcing steel bar 1, the one end of the sleeve 2 is directly aligned with the reinforcing steel bar 1 and pressed down by artificial, the fixed sleeve 4 inside the sleeve 2 is opened by the entering force of the reinforcing steel bar 1 to make the reinforcing steel bar 1 pass through, until the reinforcing steel bar 1 contacts with the limiting surface of the limiting platform 3-3 on the connecting screw 3, and the reinforcing steel bar 1 is assembled at one end; at the other end, when the reinforcing steel bar 1 is put into the sleeve 2, the one end of the reinforcing steel bar 1 is aligned with the mouth of the sleeve 2 and pressed down by the weight of the reinforcing steel bar 1 (by artificial when the reinforcing steel bar 1 is installed in parallel or in other ways), the reinforcing steel bar 1 is extruded and opened by the fixed sleeve 4 to make the reinforcing steel bar pass through, until the reinforcing steel bar 1 reaches the limiting surface of the limiting platform 3-3 on the connecting screw 3, and the reinforcing steel bar 1 is assembled.

Claims

1. A reinforcing bar quick coupling sleeve, characterized by, The utility model relates to a connecting screw rod fixing device, which comprises a sleeve, a connecting screw rod and two fixing sleeves, the connecting screw rod is threadedly connected in the sleeve, the two fixing sleeves are arranged on the two sides of the connecting screw rod and the inner side of the sleeve, the sleeve comprises a left sleeve and a right sleeve which are symmetrical to each other, the left sleeve and the right sleeve are both composed of a tapered section and a horizontal section, the diameter of the tapered section gradually increases from the starting end to the horizontal section, the inner side of the horizontal section is provided with internal threads, the cross section of the connecting screw rod is in the shape of an I-beam, external threads are arranged on the outer diameter of the connecting screw rod and matched with the internal threads of the sleeve, the two ends of the connecting screw rod are both provided with blind holes, a limiting platform is arranged between the two blind holes, the fixing sleeve is provided with internal and external tapers, four grooves are arranged on the fixing sleeve, one of the four grooves is open, the inner side of the fixing sleeve is provided with tooth traces, the internal and external tapers of the fixing sleeve are not parallel, the external taper is larger than the internal taper, the minimum size of the opening of the four grooves is larger than the width size of the straight blade of the reinforcing steel bar, the tooth traces on the inner side of the fixing sleeve are in the shape of tapered tooth traces or ring-groove straight tooth traces, and the depth of the blind hole on the connecting screw rod is greater than or equal to twice the pitch of the straight blade of the reinforcing steel bar.

2. A reinforcing bar quick coupling sleeve according to claim 1, characterised in that, The sleeve is made of carbon steel or adjustable alloy steel, and the taper of the tapered section of the sleeve is 6-10 degrees.

3. A reinforcing bar quick coupling sleeve according to claim 1, wherein The internal threads on the inner side of the horizontal section of the sleeve and the external threads on the outer diameter of the connecting screw rod are both in the shape of fine tooth traces.

4. A method of manufacturing a reinforcing bar coupling sleeve as claimed in claim 1, wherein, The processing method comprises the following steps: one, blanking; two, hot extrusion forming; three, tapping; four, heat treatment.

5. The method of claim 4, wherein, The processing method of the connecting screw rod comprises the following steps: one, cold upsetting forming; two, wire drawing forming; three, heat treatment.

6. The method of claim 4, wherein, The processing method of the fixing sleeve comprises the following steps: one, feeding of coiled material; two, shaping; three, tooth trace pressing; four, groove opening; five, blanking; six, coiling and shaping.

7. The method of claim 4, wherein After the heat treatment of the sleeve and the connecting screw rod, the tensile strength of the internal threads and the external threads is higher than the tensile strength requirement of the reinforcing steel bar.

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