CN116220280A - Self-locking threaded connector for deformed steel bar without longitudinal ribs - Google Patents
Self-locking threaded connector for deformed steel bar without longitudinal ribs Download PDFInfo
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- CN116220280A CN116220280A CN202310307908.6A CN202310307908A CN116220280A CN 116220280 A CN116220280 A CN 116220280A CN 202310307908 A CN202310307908 A CN 202310307908A CN 116220280 A CN116220280 A CN 116220280A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 238
- 239000010959 steel Substances 0.000 title claims abstract description 238
- 238000010079 rubber tapping Methods 0.000 claims abstract description 7
- 230000006978 adaptation Effects 0.000 claims description 12
- 238000012795 verification Methods 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 16
- 238000012958 reprocessing Methods 0.000 abstract description 9
- 230000003068 static effect Effects 0.000 abstract description 8
- 238000012805 post-processing Methods 0.000 abstract description 7
- 238000005096 rolling process Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention provides a self-locking threaded connector of a longitudinal rib-free threaded steel, which relates to the technical field of engineering construction and comprises a sleeve, wherein the sleeve is integrated or split, two ends inside the sleeve are respectively screwed into a first threaded steel and a second threaded steel, the outer sides of the first threaded steel and the second threaded steel are respectively provided with intermittent external threads, the inner surface of the sleeve is provided with a spiral trapezoidal thread, the spiral trapezoidal thread is matched with the intermittent external threads, and the spiral trapezoidal thread is a through thread for directly tapping one end surface inside the sleeve to the other end surface; the invention directly applies the intermittent external thread on the surface of the hot rolled deformed steel bar to adapt to the spiral trapezoidal thread in the sleeve to form threaded connection, realizes butt rigid static connection between the first deformed steel bar and the second deformed steel bar, avoids the procedure of carrying out thread threading reprocessing on the reinforced joint, simplifies the construction operation flow, and reduces the time cost of engineering construction and the post-processing cost of engineering parts.
Description
Technical Field
The invention relates to the technical field of engineering construction, in particular to a self-locking threaded connector of a longitudinal rib-free threaded steel.
Background
In engineering construction, for example: building construction, bridge construction, mine engineering and the like often need to use non-longitudinal rib deformed steel bars, and the suitability of the steel bar connection mode selection in the engineering is directly related to the quality of the engineering, and in the prior art, the following 4 common steel bar connection modes exist;
1. binding overlap joint
The binding and lapping of the steel bars means a connecting method that two steel bars have a certain overlapping length and are bound by binding wires. The reinforced plastic is suitable for the connection of reinforcing steel bars with smaller diameters, is generally used for reinforcing steel bar nets in concrete, and is uniformly arranged in longitude and latitude;
2. grouting connection of sleeve
The grouting connection of the steel bar sleeve is to restrict the steel bar by using a metal sleeve, sealing pieces at two ends and grouting materials, and high-strength and micro-expandable cement-based grouting materials are poured into the sleeve through a grouting opening on the sleeve, so that the stress transmission between the steel bars is realized by utilizing forward acting force generated between the surface of the steel bar and the surface of the ribbed steel bar between the surface of the steel bar and the inner side of the sleeve. The method is suitable for the connection of the vertically distributed steel bars of the shear wall, but not the connection of the mainly stressed steel bars;
3. welded connection
The welding connection of the reinforcing steel bars refers to a connection method for lengthening or cross-connecting the reinforcing steel bars along the axial direction by using electric welding equipment. The diameter of the welded steel bar is not too large, and a single-sided welding line or a double-sided welding line is adopted, and the length, the width and the height of the welding line are required;
4. re-threaded connection
The re-threaded connection of the steel bars refers to a connection method for forming threaded connection with the threaded joint of the steel bars by using a straight thread or a conical thread sleeve. The diameter of the steel bar in threaded connection is not too small, and the thread size of the sleeve and the steel bar joint has strict requirements;
however, in the above-described technique, there are the following drawbacks:
1. the defect of the binding and lapping of the steel bars is that the waste amount of the steel bars is too large, the lapped framework is easy to deform, and the bearing capacity is insufficient;
2. the defect of sleeve grouting connection is inconvenient construction, the grouting quality directly influences the strength of a connecting node, the grouting quality requirement is very high, and the sleeve grouting connection is not suitable for connection of mainly stressed steel bars;
3. the reinforcement welding connection has good bearing performance, but is very easy to be influenced by rain, snow and weather depending on the level of a welder, has strict requirements on equipment such as welding materials, power supplies and the like, and has larger damage to reinforcement and consumes energy;
4. the threaded connection is safe and reliable in connection quality, high in standard standardization degree, inconvenient to install and troublesome in process, and the process of reprocessing the threaded sleeve threads is added to the steel bar joint, so that the energy consumption is serious, the investment of related equipment is required to be increased, the engineering cost is increased, and the construction period is prolonged;
therefore, the invention provides a self-locking threaded connector of a screw steel without longitudinal ribs, which solves the problems in the prior art.
Disclosure of Invention
Aiming at the problems, the invention provides the self-locking threaded connector of the non-longitudinal-rib threaded steel, which directly applies the intermittent external threads on the surface of the hot-rolled threaded steel to adapt to the spiral trapezoidal threads in the sleeve to form threaded connection, so that the butt rigid static connection between the first threaded steel and the second threaded steel is realized, the procedure of threaded threading reprocessing of the reinforced joint is avoided, and the construction operation flow is simplified.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme: the self-locking threaded connector of the longitudinal rib-free threaded steel comprises a sleeve, wherein the sleeve is integrated or split, two ends inside the sleeve are respectively screwed into a first threaded steel and a second threaded steel, the outer sides of the first threaded steel and the second threaded steel are respectively provided with intermittent external threads, the inner surface of the sleeve is provided with spiral trapezoidal threads, the spiral trapezoidal threads are matched with the intermittent external threads, and the spiral trapezoidal threads are through threads for directly tapping one end face inside the sleeve to the other end face;
gaps are reserved between crests of intermittent external threads of the first thread steel and the second thread steel and roots of spiral trapezoidal threads of the sleeve.
The further improvement is that: the longitudinal section of the sleeve is one of a circle or a polygon.
The further improvement is that: the sleeve is integrated, the sleeve is non-positioning, and when the first screw-thread steel and the second screw-thread steel are assembled with the sleeve, the assembly verification is carried out manually, the working turns of the first screw-thread steel and the second screw-thread steel are controlled to be equivalent, and the first screw-thread steel and the second screw-thread steel are centered and pre-tightened.
The further improvement is that: the sleeve is integrated, the sleeve is positioned, a pin hole is formed in the middle position of the outer side of the sleeve, a positioning pin is inserted into the pin hole, the positioning pin extends into the sleeve, and when the first thread steel and the second thread steel are assembled with the sleeve, the positioning pin is used for axially positioning the opposite top end of the first thread steel and the opposite top end of the second thread steel.
The further improvement is that: the pin holes are provided with one or more groups in the circumferential direction, the pin holes are one of round, square and polygonal, and the positioning pins are one of cylindrical pins, conical pins, square pins and polygonal pins.
The further improvement is that: the sleeve is split type, and the sleeve is non-locating type, the sleeve includes first half sleeve and second half sleeve, first half sleeve's one end is equipped with the concatenation section, the inside one end of second half sleeve is equipped with the splice groove, concatenation section and splice groove looks adaptation, the splice section outside is equipped with the external screw thread, splice groove inboard is equipped with the internal thread with the external screw thread looks adaptation, concatenation section one end is tight with the inboard one end top of splice groove.
The further improvement is that: when the first screw-thread steel is assembled with the first half sleeve and the second screw-thread steel is assembled with the second half sleeve, the working turns of the first screw-thread steel and the second screw-thread steel are controlled to be equivalent through manual assembly verification, and the first screw-thread steel and the second screw-thread steel are centered and pre-tightened.
The further improvement is that: the sleeve is split type, and the sleeve is the locate mode, the sleeve includes first half sleeve and second half sleeve, first half sleeve's one end is equipped with the concatenation section, the inside one end of second half sleeve is equipped with the splice groove, concatenation section and splice groove looks adaptation, the splice section outside is equipped with the external screw thread, splice groove inboard is equipped with the internal thread with the external screw thread looks adaptation, leave the mounting groove between splice section one end and the inboard one end of splice groove, and the inside of mounting groove is equipped with the spacer.
The further improvement is that: when the first screw thread steel is assembled with the first half sleeve and the second screw thread steel is assembled with the second half sleeve, the locating piece is used for axially locating the butt end of the first screw thread steel and the second screw thread steel.
The beneficial effects of the invention are as follows:
1. the invention directly applies the intermittent external thread on the surface of the hot rolled deformed steel bar to adapt to the spiral trapezoidal thread in the sleeve to form threaded connection, realizes butt rigid static connection between the first deformed steel bar and the second deformed steel bar, avoids the procedure of carrying out thread threading reprocessing on the reinforced bar joint, simplifies the construction operation flow, reduces the time cost of engineering construction and the post-processing cost of engineering parts, saves the investment of related complete equipment and labor cost, has convenient and efficient connection mode and safe and reliable connection quality.
2. According to the invention, gaps are reserved between the crests of the intermittent external threads of the first deformed steel bar and the second deformed steel bar and the bottoms of the spiral trapezoidal threads of the sleeve, so that the integral consistency of the deformed steel bar in the process of connecting the head and tail ends or the middle section of the deformed steel bar with the sleeve in a threaded manner is ensured, and the influence caused by the diameter difference of the head and tail ends or the middle section of the deformed steel bar is avoided.
3. The sleeve is integrated or split, positioned or non-positioned, the first screw-thread steel and the second screw-thread steel are controlled to be connected and centered, pre-tightened and axially positioned through the positioning pin or the positioning sheet, the working turns of the first screw-thread steel and the second screw-thread steel on two sides are ensured to be identical, the connecting strength is equal, the high-strength and high-rigidity combined sleeve has good force transmission performance, is stable and reliable, is accurate in assembly and positioning, and is convenient and efficient to connect.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a third embodiment of the present invention;
FIG. 4 is a schematic diagram of an embodiment of the present invention;
FIG. 5 is a front view of the deformed steel bar of the present invention;
FIG. 6 is a side view of the deformed steel bar of the present invention;
fig. 7 is a schematic view of an interrupted male thread of the present invention.
Wherein: 1. a sleeve; 2. a first screw-thread steel; 3. a second screw-thread steel; 4. intermittent external threads; 5. spiral trapezoidal threads; 6. a pin hole; 7. a positioning pin; 8. a first half sleeve; 9. a second half sleeve; 10. splicing sections; 11. an external thread; 12. an internal thread; 13. and (5) positioning sheets.
Detailed Description
The present invention will be further described in detail with reference to the following examples, which are only for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
According to the embodiment shown in fig. 1, the self-locking threaded connector of the longitudinal rib-free threaded steel is provided, and comprises a sleeve 1, wherein the sleeve 1 is integrated or split, two ends inside the sleeve 1 are respectively screwed into a first threaded steel 2 and a second threaded steel 3, the outer sides of the first threaded steel 2 and the second threaded steel 3 are respectively provided with a discontinuous external thread 4, the inner surface of the sleeve 1 is provided with a spiral trapezoidal thread 5, the spiral trapezoidal thread 5 is matched with the discontinuous external thread 4, and the spiral trapezoidal thread 5 is a through thread for directly tapping one end face to the other end face inside the sleeve 1; when the screw thread connecting device is used, intermittent external threads 4 on the surfaces of the first screw thread steel 2 and the second screw thread steel 3 are directly applied to adapt to screw trapezoidal threads in the sleeve 1 to form screw thread connection, butt rigid static connection between the first screw thread steel 2 and the second screw thread steel 3 is realized, the procedure of screw thread threading reprocessing of a reinforced joint is avoided, the construction operation flow is simplified, the time cost of engineering construction and the post-processing cost of engineering parts are reduced, the investment of related complete equipment and labor cost is saved, the connecting mode is convenient and efficient, and the connecting quality is safe and reliable;
gaps are reserved between crests of the intermittent external threads 4 of the first thread steel 2 and the second thread steel 3 and bottoms of the spiral trapezoidal threads 5 of the sleeve 1. In the rolling process of the first deformed steel bar 2 and the second deformed steel bar 3 (hot-rolled deformed steel bars), compared with the middle section, the two ends of the deformed steel bars lack rolling tension, the temperatures of the two ends are slightly lower, the diameters of the hot-rolled deformed steel bars are not uniform as a whole, and the diameters of the front end and the rear end are slightly larger than those of the middle section, so that the machining of the spiral trapezoidal thread 5 is required to ensure that a gap is reserved between the crest of the intermittent external thread 4 and the root of the spiral trapezoidal thread 5, so that the integral consistency of threaded connection between the front end and the rear end of the deformed steel bars, the middle section and the sleeve 1 is ensured.
The longitudinal section of the sleeve 1 is circular.
The sleeve 1 is integrated, the sleeve 1 is non-positioning, when the first deformed steel bar 2 and the second deformed steel bar 3 are assembled with the sleeve 1, the assembly verification is performed manually, the working turns of the first deformed steel bar 2 and the second deformed steel bar 3 are controlled to be equivalent, and the first deformed steel bar 2 and the second deformed steel bar 3 are centered and pre-tightened. The internal surface of the sleeve 1 is provided with spiral trapezoidal threads 5 matched with the intermittent external threads 4 on the surface of the hot-rolled deformed steel bar, the first deformed steel bar 2 and the second deformed steel bar 3 are respectively screwed in from the two ends of the sleeve 1, the deformed steel bar is screwed in a opposite-to-top mode, when the deformed steel bar is assembled with the sleeve 1, assembly verification is needed manually, the working turns of threads on the two sides are guaranteed to be equivalent, and the deformed steel bars are centered and pre-tightened.
Example two
According to fig. 2, this embodiment provides a non-longitudinal rib screw thread steel self-locking threaded connector, which comprises a sleeve 1, wherein the sleeve 1 is an integral type or a split type, two ends inside the sleeve 1 are respectively screwed into a first screw thread steel 2 and a second screw thread steel 3, the outer sides of the first screw thread steel 2 and the second screw thread steel 3 are respectively provided with a discontinuous external thread 4, the inner surface of the sleeve 1 is provided with a spiral trapezoidal thread 5, the spiral trapezoidal thread 5 is matched with the discontinuous external thread 4, and the spiral trapezoidal thread 5 is a through thread for directly tapping one end surface to the other end surface inside the sleeve 1; when the screw thread connecting device is used, intermittent external threads 4 on the surfaces of the first screw thread steel 2 and the second screw thread steel 3 are directly applied to adapt to screw trapezoidal threads in the sleeve 1 to form screw thread connection, butt rigid static connection between the first screw thread steel 2 and the second screw thread steel 3 is realized, the procedure of screw thread threading reprocessing of a reinforced joint is avoided, the construction operation flow is simplified, the time cost of engineering construction and the post-processing cost of engineering parts are reduced, the investment of related complete equipment and labor cost is saved, the connecting mode is convenient and efficient, and the connecting quality is safe and reliable;
gaps are reserved between crests of the intermittent external threads 4 of the first thread steel 2 and the second thread steel 3 and bottoms of the spiral trapezoidal threads 5 of the sleeve 1. In the rolling process of the first deformed steel bar 2 and the second deformed steel bar 3 (hot-rolled deformed steel bars), compared with the middle section, the two ends of the deformed steel bars lack rolling tension, the temperatures of the two ends are slightly lower, the diameters of the hot-rolled deformed steel bars are not uniform as a whole, and the diameters of the front end and the rear end are slightly larger than those of the middle section, so that the machining of the spiral trapezoidal thread 5 is required to ensure that a gap is reserved between the crest of the intermittent external thread 4 and the root of the spiral trapezoidal thread 5, so that the integral consistency of threaded connection between the front end and the rear end of the deformed steel bars, the middle section and the sleeve 1 is ensured.
The longitudinal section of the sleeve 1 is circular.
The sleeve 1 is as an organic whole, and sleeve 1 is the locate mode, the intermediate position department in the sleeve 1 outside is equipped with pinhole 6, and the inside of pinhole 6 is inserted and is equipped with locating pin 7, locating pin 7 extends into the inside of sleeve 1, when first screw thread steel 2, second screw thread steel 3 and sleeve 1 are assembled, locating pin 7 is used for carrying out axial positioning to the butt end department of first screw thread steel 2, second screw thread steel 3. The pin holes 6 are provided with a group, the pin holes 6 are round, and the positioning pins 7 are cylindrical pins. A sleeve 1 with pin holes 6 (1 or more pin holes 6 can be uniformly distributed in the circumferential direction), wherein the inner surface of the sleeve 1 is provided with spiral trapezoidal threads 5 matched with discontinuous external threads 4 on the surface of hot-rolled deformed steel bars; the pin holes 6 are inserted with positioning pins 7 (cylindrical pins, conical pins and square pins can be used, and 1 or more positioning pins 7 can be uniformly arranged in the circumferential direction) so as to ensure the axial positioning of the two threaded steel joints in the sleeve 1; the first thread steel 2 and the second thread steel 3 are respectively screwed in from the two ends of the sleeve 1 and are screwed in opposite top.
Example III
According to the embodiment shown in fig. 3, the self-locking threaded connector of the longitudinal rib-free threaded steel is provided, and comprises a sleeve 1, wherein the sleeve 1 is integrated or split, two ends inside the sleeve 1 are respectively screwed into a first threaded steel 2 and a second threaded steel 3, the outer sides of the first threaded steel 2 and the second threaded steel 3 are respectively provided with a discontinuous external thread 4, the inner surface of the sleeve 1 is provided with a spiral trapezoidal thread 5, the spiral trapezoidal thread 5 is matched with the discontinuous external thread 4, and the spiral trapezoidal thread 5 is a through thread for directly tapping one end face to the other end face inside the sleeve 1; when the screw thread connecting device is used, intermittent external threads 4 on the surfaces of the first screw thread steel 2 and the second screw thread steel 3 are directly applied to adapt to screw trapezoidal threads in the sleeve 1 to form screw thread connection, butt rigid static connection between the first screw thread steel 2 and the second screw thread steel 3 is realized, the procedure of screw thread threading reprocessing of a reinforced joint is avoided, the construction operation flow is simplified, the time cost of engineering construction and the post-processing cost of engineering parts are reduced, the investment of related complete equipment and labor cost is saved, the connecting mode is convenient and efficient, and the connecting quality is safe and reliable;
gaps are reserved between crests of the intermittent external threads 4 of the first thread steel 2 and the second thread steel 3 and bottoms of the spiral trapezoidal threads 5 of the sleeve 1. In the rolling process of the first deformed steel bar 2 and the second deformed steel bar 3 (hot-rolled deformed steel bars), compared with the middle section, the two ends of the deformed steel bars lack rolling tension, the temperatures of the two ends are slightly lower, the diameters of the hot-rolled deformed steel bars are not uniform as a whole, and the diameters of the front end and the rear end are slightly larger than those of the middle section, so that the machining of the spiral trapezoidal thread 5 is required to ensure that a gap is reserved between the crest of the intermittent external thread 4 and the root of the spiral trapezoidal thread 5, so that the integral consistency of threaded connection between the front end and the rear end of the deformed steel bars, the middle section and the sleeve 1 is ensured.
The longitudinal section of the sleeve 1 is polygonal.
The sleeve 1 is split type, and sleeve 1 is non-location formula, sleeve 1 includes first half sleeve 8 and second half sleeve 9, the one end of first half sleeve 8 is equipped with concatenation section 10, the inside one end of second half sleeve 9 is equipped with the splice groove, concatenation section 10 and splice groove looks adaptation, the concatenation section 10 outside is equipped with external screw thread 11, the splice groove inboard is equipped with the internal thread 12 with external screw thread 11 looks adaptation, concatenation section 10 one end is tight with the inboard one end top of splice groove. When the first deformed steel bar 2 is assembled with the first half sleeve 8 and the second deformed steel bar 3 is assembled with the second half sleeve 9, the working turns of the first deformed steel bar 2 and the second deformed steel bar 3 are controlled to be equivalent through manual assembly verification, and the first deformed steel bar 2 and the second deformed steel bar 3 are centered and pre-tightened. The inner surfaces of the first half sleeve 8 and the second half sleeve 9 are respectively provided with a spiral trapezoidal thread 5 matched with the intermittent external thread 4 on the surface of the hot-rolled deformed steel bar, and one ends of the two sleeves are respectively provided with a standard connecting external thread 11 and an internal thread 12 for assembly; the first deformed steel bar 2 and the second deformed steel bar 3 are respectively screwed in from the other ends of the two sleeves, are screwed in the opposite ends, and are required to be manually assembled and checked when being assembled with the first half sleeve 8 and the second half sleeve 9, so that the working turns of the deformed steel bars on the two sides are equivalent, and the deformed steel bars are centered and pre-tightened.
Example IV
According to the illustration in fig. 4, this embodiment proposes a self-locking threaded connector of screw-thread steel without longitudinal ribs, comprising a sleeve 1, wherein the sleeve 1 is an integral body or a split body, two ends inside the sleeve 1 are respectively screwed into a first screw-thread steel 2 and a second screw-thread steel 3, the outer sides of the first screw-thread steel 2 and the second screw-thread steel 3 are respectively provided with a discontinuous external thread 4, the inner surface of the sleeve 1 is provided with a spiral trapezoidal thread 5, the spiral trapezoidal thread 5 is matched with the discontinuous external thread 4, and the spiral trapezoidal thread 5 is a through thread for directly tapping one end surface to the other end surface inside the sleeve 1; when the screw thread connecting device is used, intermittent external threads 4 on the surfaces of the first screw thread steel 2 and the second screw thread steel 3 are directly applied to adapt to screw trapezoidal threads in the sleeve 1 to form screw thread connection, butt rigid static connection between the first screw thread steel 2 and the second screw thread steel 3 is realized, the procedure of screw thread threading reprocessing of a reinforced joint is avoided, the construction operation flow is simplified, the time cost of engineering construction and the post-processing cost of engineering parts are reduced, the investment of related complete equipment and labor cost is saved, the connecting mode is convenient and efficient, and the connecting quality is safe and reliable;
gaps are reserved between crests of the intermittent external threads 4 of the first thread steel 2 and the second thread steel 3 and bottoms of the spiral trapezoidal threads 5 of the sleeve 1. In the rolling process of the first deformed steel bar 2 and the second deformed steel bar 3 (hot-rolled deformed steel bars), compared with the middle section, the two ends of the deformed steel bars lack rolling tension, the temperatures of the two ends are slightly lower, the diameters of the hot-rolled deformed steel bars are not uniform as a whole, and the diameters of the front end and the rear end are slightly larger than those of the middle section, so that the machining of the spiral trapezoidal thread 5 is required to ensure that a gap is reserved between the crest of the intermittent external thread 4 and the root of the spiral trapezoidal thread 5, so that the integral consistency of threaded connection between the front end and the rear end of the deformed steel bars, the middle section and the sleeve 1 is ensured.
The longitudinal section of the sleeve 1 is polygonal.
The sleeve is split type, and the sleeve is the locate mode, sleeve 1 includes first half sleeve 8 and second half sleeve 9, the one end of first half sleeve 8 is equipped with concatenation section 10, the inside one end of second half sleeve 9 is equipped with the splice groove, concatenation section 10 and splice groove looks adaptation, the concatenation section 10 outside is equipped with external screw thread 11, the splice groove inboard is equipped with the internal thread 12 with external screw thread 11 looks adaptation, leave the mounting groove between the inboard one end of concatenation section 10 and splice groove, and the inside of mounting groove is equipped with spacer 13. When the first thread steel 2 is assembled with the first half sleeve 8 and the second thread steel 3 is assembled with the second half sleeve 9, the locating piece 13 is used for axially locating the butt ends of the first thread steel 2 and the second thread steel 3. The inner surfaces of the first half sleeve 8 and the second half sleeve 9 are respectively provided with a spiral trapezoidal thread 5 matched with the intermittent external thread 4 on the surface of the hot-rolled deformed steel bar, and one ends of the two sleeves are respectively provided with a standard connecting external thread 11 and an internal thread 12 for assembly; the locating piece 13 is arranged in the middle to ensure the axial location of the first screw thread steel 2 and the second screw thread steel 3 in the first half sleeve 8 and the second half sleeve 9; the first thread steel 2 and the second thread steel 3 are respectively screwed in from the other ends of the two sleeves and are screwed in opposite top.
Technical parameters
Technical parameters of hot rolled deformed steel bar without longitudinal ribs are shown in fig. 5, 6 and 7:
thread rise angle γ: more than 0 DEG and less than 20 DEG;
thread tooth angle α: 60-90 ° (optimum), 30-120 ° (general);
pitch: p=0.5d1;
number of lines: n=1, single line;
the number of working turns: z=3.5 to 6;
sleeve length: l is approximately equal to 2 zP;
and (3) rotating: the left-handed and right-handed screw can be realized, and the screw direction is the same as that of the screw steel screw.
P-pitch; beta-thread lead angle; γ -thread rise angle, γ=90 ° - β; d 1-base circle diameter; h-high thread; b-thread bottom width; alpha-thread form angle; r-root arc radius of thread.
The invention directly uses the intermittent external thread 4 on the surface of the hot-rolled deformed steel bar to adapt to the spiral trapezoidal thread in the sleeve 1 to form threaded connection, realizes butt rigid static connection between the first deformed steel bar 2 and the second deformed steel bar 3, avoids the procedure of carrying out thread threading reprocessing on the reinforced bar joint, simplifies the construction operation flow, reduces the time cost of engineering construction and the post-processing cost of engineering parts, saves the investment of related complete equipment and labor cost, has convenient and efficient connection mode and safe and reliable connection quality. And gaps are reserved between the crests of the intermittent external threads 4 of the first deformed steel bar 2 and the second deformed steel bar 3 and the bottoms of the spiral trapezoidal threads 5 of the sleeve 1, so that the overall consistency of the deformed steel bars in the threaded connection of the head and tail ends or the middle section with the sleeve is ensured, and the influence caused by the diameter difference of the head and tail ends or the middle section of the deformed steel bars is avoided. Meanwhile, the sleeve 1 is integrated or split, positioned or non-positioned, the first deformed steel bar 2 and the second deformed steel bar 3 are controlled to be connected and centered, pre-tightened and axially positioned through the positioning pin 7 or the positioning sheet 13, the first deformed steel bar 2 and the second deformed steel bar 3 on two sides are ensured to have the same work circle number and equal connection strength, so that the sleeve has better force transmission performance, stable and reliable strength and rigidity, and the sleeve is accurate in assembly and positioning, and convenient and efficient in connection; if the positioning element is not added, the assembly verification is needed manually during assembly, the equal number of working turns of the screw steels at the two sides is ensured, and the centering and pre-tightening are realized.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a no longitudinal rib screw-thread steel auto-lock threaded connection ware, includes sleeve (1), its characterized in that: the sleeve (1) is integrated or split, two ends inside the sleeve (1) are respectively screwed into a first screw thread steel (2) and a second screw thread steel (3), the outer sides of the first screw thread steel (2) and the second screw thread steel (3) are respectively provided with a discontinuous external thread (4), the inner surface of the sleeve (1) is provided with a spiral trapezoidal thread (5), the spiral trapezoidal thread (5) is matched with the discontinuous external thread (4), and the spiral trapezoidal thread (5) is a through thread for directly tapping one end face inside the sleeve (1) to the other end face;
gaps are reserved between crests of intermittent external threads (4) of the first deformed steel bars (2) and the second deformed steel bars (3) and bottoms of spiral trapezoidal threads (5) of the sleeve (1).
2. The non-longitudinal rib screw-steel self-locking threaded connector according to claim 1, characterized in that: the longitudinal section of the sleeve (1) is one of a circle or a polygon.
3. The non-longitudinal rib screw-steel self-locking threaded connector according to claim 2, characterized in that: the sleeve (1) is integrated, the sleeve (1) is non-positioning, and when the first deformed steel bar (2) and the second deformed steel bar (3) are assembled with the sleeve (1), the assembly verification is performed manually, the working turns of the first deformed steel bar (2) and the second deformed steel bar (3) are controlled to be equivalent, and the first deformed steel bar (2) and the second deformed steel bar (3) are centered and preloaded.
4. The non-longitudinal rib screw-steel self-locking threaded connector according to claim 2, characterized in that: sleeve (1) is integral type, and sleeve (1) is the locate mode, intermediate position department in sleeve (1) outside is equipped with pinhole (6), and the inside of pinhole (6) is inserted and is equipped with locating pin (7), locating pin (7) extend into the inside of sleeve (1), during first screw-thread steel (2), second screw-thread steel (3) and sleeve (1) assembly, locating pin (7) are used for carrying out axial positioning to top head department of first screw-thread steel (2), second screw-thread steel (3).
5. The non-longitudinal rib steel self-locking threaded connector of claim 4, wherein: the pin holes (6) are provided with one group or a plurality of groups in the circumferential direction, the pin holes (6) are one of round, square and polygonal, and the positioning pins (7) are one of cylindrical pins, conical pins, square pins and polygonal pins.
6. The non-longitudinal rib screw-steel self-locking threaded connector according to claim 2, characterized in that: sleeve (1) is split type, and sleeve (1) is non-location formula, sleeve (1) is including first half sleeve (8) and second half sleeve (9), the one end of first half sleeve (8) is equipped with concatenation section (10), the inside one end of second half sleeve (9) is equipped with the splice groove, concatenation section (10) and splice groove looks adaptation, concatenation section (10) outside is equipped with external screw thread (11), splice groove inboard is equipped with internal thread (12) with external screw thread (11) looks adaptation, concatenation section (10) one end is tight with the inboard one end top of splice groove.
7. The non-longitudinal rib steel self-locking threaded connector of claim 6, wherein: when the first deformed steel bar (2) is assembled with the first half sleeve (8) and the second deformed steel bar (3) is assembled with the second half sleeve (9), the assembly verification is performed manually, the working turns of the first deformed steel bar (2) and the second deformed steel bar (3) are controlled to be equivalent, and the first deformed steel bar (2) and the second deformed steel bar (3) are centered and pre-tightened.
8. The non-longitudinal rib screw-steel self-locking threaded connector according to claim 2, characterized in that: the sleeve is split type, and the sleeve is the locate mode, sleeve (1) is including first half sleeve (8) and second half sleeve (9), the one end of first half sleeve (8) is equipped with concatenation section (10), the inside one end of second half sleeve (9) is equipped with the splice groove, concatenation section (10) and splice groove looks adaptation, concatenation section (10) outside is equipped with external screw thread (11), splice inslot side is equipped with internal thread (12) with external screw thread (11) looks adaptation, leave the mounting groove between the one end of concatenation section (10) and the inboard one end of splice groove, and the inside of mounting groove is equipped with spacer (13).
9. The non-longitudinal rib steel self-locking threaded connector of claim 8, wherein: when the first screw thread steel (2) is assembled with the first half sleeve (8) and the second screw thread steel (3) is assembled with the second half sleeve (9), the locating piece (13) is used for axially locating the top ends of the first screw thread steel (2) and the second screw thread steel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307908.6A CN116220280A (en) | 2023-03-27 | 2023-03-27 | Self-locking threaded connector for deformed steel bar without longitudinal ribs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307908.6A CN116220280A (en) | 2023-03-27 | 2023-03-27 | Self-locking threaded connector for deformed steel bar without longitudinal ribs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116220280A true CN116220280A (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310307908.6A Pending CN116220280A (en) | 2023-03-27 | 2023-03-27 | Self-locking threaded connector for deformed steel bar without longitudinal ribs |
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| Country | Link |
|---|---|
| CN (1) | CN116220280A (en) |
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| CN218292849U (en) * | 2022-04-27 | 2023-01-13 | 中冶建筑研究总院有限公司 | Mechanical connecting device for reinforcing steel bars |
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