CN111691605A - Assembled hemisphere single hinge reinforcing bar machinery sleeve connection node - Google Patents
Assembled hemisphere single hinge reinforcing bar machinery sleeve connection node Download PDFInfo
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- CN111691605A CN111691605A CN202010650931.1A CN202010650931A CN111691605A CN 111691605 A CN111691605 A CN 111691605A CN 202010650931 A CN202010650931 A CN 202010650931A CN 111691605 A CN111691605 A CN 111691605A
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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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- 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
- E04C5/18—Spacers of metal or substantially of metal
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses an assembled hemispherical single-hinge steel bar mechanical sleeve connecting node which is used for connecting a prefabricated part and a prefabricated part steel bar in the assembled building engineering industry. The steel bar clamp comprises hemispherical end steel bars, first end threaded steel bars, an outer sleeve, an inner sleeve, a double sleeve and second end threaded steel bars; the semispherical end steel bar is inserted from the threaded end of the outer sleeve and extends out of the truncated cone-shaped cross section of the outer sleeve, the semispherical end of the semispherical end steel bar is clamped in the outer sleeve and is connected with the semispherical cross section, the semispherical end steel bar can swing within the swing angle range of the truncated cone-shaped cross section of the outer sleeve, the swing angle is the included angle theta between the truncated cone-shaped cross section of the outer sleeve and the central plane, and the value of the swing angle theta is 2-. The invention can adapt to the offset of the staggered connection of the upper end part threaded steel bar and the lower end part threaded steel bar and can realize the rapid assembly of the joint. In addition, the invention needs small construction working surface and low cost.
Description
Technical Field
The invention relates to the field of assembly type building construction, in particular to a novel assembly type hemispherical single-hinged steel bar mechanical sleeve connecting node.
Background
The requirements of technical regulations of prefabricated concrete structures are as follows: the superposed beams can be in butt joint connection, and the longitudinal steel bars at the lower parts of the beams are in mechanical connection, grouting sleeve connection and welding connection in the post-pouring section. The steel bar connection length required by mechanical connection is short, but the requirement of the mechanical connection on the manufacturing accuracy of the member is extremely high, and if deviation occurs, the later-stage deviation rectifying process is extremely complex; and by adopting welding connection, a heat affected zone is arranged near a welding seam, the material at the position becomes brittle, welding residual stress and residual strain are easy to generate, cracks are easy to expand, and the fracture is easy to break at low temperature.
Aiming at the problems, the prior art mainly adopts a grouting sleeve connection technology, the grouting sleeve connection needs to separate a grouting process of steel bar connection and concrete pouring of member connection, the construction process is extremely complicated, the precision requirement is high, the grouting sleeve is high in manufacturing cost, and the grouting sleeve is not suitable for large-area use. In the work progress, grout muffjoint appears about connecting reinforcement not on same straight line easily, great deviation appears. Meanwhile, due to construction errors, the upper cross section and the lower cross section of the joint of the components are not parallel, so that the upper connecting steel bar and the lower connecting steel bar are too long or too short.
Disclosure of Invention
Aiming at the defects of the mechanical sleeve connection mode, the invention provides the novel assembled hemispherical single-hinged steel bar mechanical sleeve connection node with low cost, which can avoid construction errors caused by the fact that the prefabricated part and the connection steel bar of the prefabricated part rib are not in the same straight line, can adapt to the offset of the staggered connection of the upper end part threaded steel bar and the lower end part threaded steel bar, and can realize the rapid assembly of the node.
In order to solve the technical problems, the invention adopts the following technical scheme:
an assembled hemispherical single-hinge steel bar mechanical sleeve connecting node comprises a hemispherical end steel bar, a first end part threaded steel bar, an outer sleeve, an inner sleeve, a double sleeve and a second end part threaded steel bar; the first end part threaded steel bar and the second end part threaded steel bar are prefabricated components of steel bars to be connected; the hemispherical end steel bar comprises a steel bar section and a hemispherical end, the diameter of the steel bar section is smaller than that of any section of the hemispherical end, and the end part of the steel bar section is provided with a hemispherical end steel bar thread; the outer sleeve is a cylinder with a through hole, and the through hole is formed by sequentially connecting a threaded end of the outer sleeve, a hemispherical section and a truncated cone-shaped section of the outer sleeve; the threaded end of the outer sleeve is internally provided with internal threads in the through hole, the diameter of the truncated cone-shaped section of the outer sleeve is gradually reduced from the outside to the inside of the through hole, the hemispherical section is connected with the end with the smallest diameter of the truncated cone-shaped section of the outer sleeve and the threaded end of the outer sleeve, and the hollow diameter of the threaded end of the outer sleeve is larger than the diameter of any section of the hemispherical section; the semispherical end steel bar is inserted from the threaded end of the outer sleeve and extends out of the truncated cone-shaped cross section of the outer sleeve, the semispherical end of the semispherical end steel bar is clamped in the outer sleeve and is connected with the semispherical cross section, the semispherical end steel bar can swing within the range of the swing angle of the truncated cone-shaped cross section of the outer sleeve, the swing angle is the included angle theta between the truncated cone-shaped cross section of the outer sleeve and a central plane, and the central plane is the horizontal plane of the intersection point of the; the connection between the hemispherical end steel bar and the outer sleeve forms a single hinge rotating in a swing angle theta; the value of the swing angle theta is 2-20 degrees; the inner side thread of the inner sleeve is in threaded connection with the first end part of the steel bar with the thread, and the outer side thread of the inner sleeve is in threaded connection with the threaded end of the outer sleeve; the thread of the hemispherical end steel bar and the thread of the second end part of the hemispherical end steel bar are respectively in threaded connection with the first double-sleeve threaded end and the second double-sleeve threaded end of the double sleeve.
In order to further achieve the purpose of the invention, preferably, the hemispherical end reinforcing steel bar thread meets the requirements of 'acceptance criteria for construction quality of concrete structure engineering'.
Preferably, the first end part threaded steel bar and the second end part threaded steel bar meet the requirements of the acceptance criteria of construction quality of concrete structure engineering; the length and the screw thread distance of the first double-sleeve threaded end and the second double-sleeve threaded end of the double sleeve meet the requirements of technical regulations on mechanical connection of steel bars. The strength of the end part threaded steel bar and the double-sleeve connection is guaranteed, force transmission between the steel bars is guaranteed due to sufficient strength, and meanwhile according to actual conditions, the length of the thread tapping section of the lower end part threaded steel bar is shortened, so that the influence of error caused by the fact that the upper part and the lower part of the connecting steel bar are too short due to construction is avoided.
Preferably, the threaded length of the first end portion of the threaded reinforcing bar is greater than the length of the first double-sleeve threaded end of the inner sleeve; the length of the thread tapping section of the second end part threaded steel bar is greater than that of the threaded end of the second double-sleeve; the strength of the connection between the end part of the steel bar with the thread and the inner sleeve is ensured, and the sufficient strength is ensured to transfer force between the steel bars.
Preferably, the maximum diameter of the hemispherical end is larger than the minimum circular section diameter of the truncated cone-shaped section of the outer sleeve and at least exceeds 6 mm; the hemispherical steel bars can be clamped on the conical inclined plane of the outer sleeve and cannot be pulled out, and the hemispherical steel bars have enough strength to ensure the force transmission of the steel bars.
Preferably, the length and the screw thread spacing of the outer side screw thread of the inner sleeve, the length and the screw thread spacing of the inner side screw thread and the screw thread end of the outer sleeve meet the requirements of technical code for mechanical connection of reinforcing steel bars.
Preferably, the outer sleeve is prepared by hot-roll forming; the outer sleeve circular truncated cone-shaped section is formed by processing a conical inclined plane through a lathe; the threaded end of the outer sleeve is usually formed by turning, milling, tapping, threading, grinding and whirlwind cutting; the hemispherical cross section is shaped by hot roll forming.
Preferably, the distance between the maximum circular section of the hemispherical end reinforcing steel bar and the inner sleeve is 2-10 mm.
Preferably, the shortest distance between the first double-sleeve threaded end and the second double-sleeve threaded end of the double-sleeve is a double-sleeve gap, and the length of the double-sleeve gap is 2-30 mm.
The semispherical end steel bar is inserted from the threaded end of the outer sleeve and extends out of the conical inclined plane end of the outer sleeve, so that the semispherical end steel bar is limited and restrained by the outer sleeve; the upper end is provided with a thread steel bar which is connected with the inner sleeve through a thread; the inner sleeve is connected with the threaded end of the outer sleeve through the outer thread to complete upper connection; the thread end part of the hemispherical end steel bar is connected with one end of the double sleeve through a thread; the lower end of the double-sleeve is provided with a threaded steel bar which is connected with the other end of the double-sleeve through threads to complete the integral connection.
Compared with the prior art, the invention has the beneficial effects that:
1. the outer sleeve provides circular truncated cone cross-section and hemisphere cross-section for hemisphere end joint bar can rotate at outer sleeve and hemisphere end joint bar contact department, has certain home range, can adapt to the dislocation connection of upper portion tip threaded reinforcement and lower part tip threaded reinforcement like this.
2. The connection between the hemispherical end steel bar and the outer sleeve in the assembled hemispherical single-hinge steel bar mechanical sleeve connection node forms a single hinge rotating within a swing angle theta; the hemispherical end steel bar can rotate in the outer sleeve, so that construction deviation is met more easily, the operation is simpler while the safe stress of the node is ensured, the swing angle theta reaches a wider range of 2-20 degrees, and the problem of connection in the deviation range of the prefabricated member steel bar outlet butt joint construction is solved.
3. According to the invention, the influence caused by overlong or overlong short upper-end threaded steel bars and lower-end threaded steel bars at the connecting part of the component due to the fact that the upper cross section and the lower cross section of the connecting part of the component are not parallel can be avoided by reserving the thread length of the lower connecting steel bars and the thread length of the double sleeves.
4. The construction cost of the invention is low for the grouting sleeve connected by the prior prefabricated part, and meanwhile, the stress of the post-pouring section mode for the steel bar lap joint is more reliable, the application range is wider, the post-pouring area is less, and the industrialization degree is higher.
5. The invention connects the hemispherical end connecting steel bar and the steel bar with the thread at the lower end part through the double sleeves, and can realize the quick assembly of the node during construction.
Drawings
Fig. 1 is a schematic structural view of an assembled hemispherical single-hinge steel bar mechanical sleeve connection node.
Fig. 2 is a top view of the hemispherical-end rebar of fig. 1.
Fig. 3 is a cross-sectional view of the center line of the hemispherical-end rebar of fig. 2.
Fig. 4 is a schematic cross-sectional view of the first end portion of the rebar of fig. 1.
Fig. 5 is a schematic cross-sectional view of the second end-threaded rebar of fig. 1.
Fig. 6 is a top view of the outer sleeve of fig. 1.
Fig. 7 is a cross-sectional view of the centerline of the outer sleeve of fig. 6.
FIG. 8 is a top view of the inner sleeve of FIG. 1
Figure 9 is a centerline cross-sectional view of the inner sleeve of figure 8.
FIG. 10 is a top view of the dual sleeve of FIG. 1.
FIG. 11 is a centerline cross-sectional view of the dual sleeve of FIG. 10.
Fig. 12 is a schematic front view showing an application example of the fabricated hemispherical single-twisted steel bar mechanical sleeve connection node according to the present invention.
Fig. 13 is a schematic top view illustrating an application example of the fabricated hemispherical single-twisted steel bar mechanical sleeve connection node according to the present invention.
The figures show that: the steel bar comprises a hemispherical end steel bar 1, a steel bar section 11, a hemispherical end 12, a hemispherical end steel bar thread 13, a first end part threaded steel bar 2, an outer sleeve 3, an outer sleeve circular truncated cone-shaped section 31, an outer sleeve threaded end 32, a hemispherical section 33, an inner sleeve 4, an outer thread 41, an inner thread 42, a double sleeve 5, a first double sleeve threaded end 51, a second double sleeve threaded end 52, a second end part threaded steel bar 6 and a precast beam 7.
Detailed Description
In order to better support the present invention, the following further describes the present invention with reference to the attached drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1, an assembled hemispherical single-hinge steel bar mechanical sleeve connection node comprises a hemispherical end steel bar 1, a first end threaded steel bar 2, an outer sleeve 3, an inner sleeve 4, a double sleeve 5 and a second end threaded steel bar 6; the first end part threaded steel bar 2 and the second end part threaded steel bar are prefabricated steel bars to be connected, each hemispherical end steel bar comprises a steel bar section 11 and a hemispherical end 12, the diameter of the section of each steel bar section 11 is smaller than that of any section of each hemispherical end 12, and the end part of each steel bar section 11 is provided with a hemispherical end steel bar thread 13; the outer sleeve 3 is a cylinder with a through hole, and the through hole is formed by sequentially connecting a threaded end 32 of the outer sleeve, a hemispherical section 33 and a truncated cone-shaped section 31 of the outer sleeve; the threaded end 32 of the outer sleeve is internally provided with internal threads in the through hole, the diameter of the section of the truncated cone-shaped cross section 31 of the outer sleeve is gradually reduced from the outside to the inside of the through hole, the hemispherical section 33 is connected with the end with the smallest diameter of the truncated cone-shaped cross section 31 of the outer sleeve and the threaded end 32 of the outer sleeve, and the hollow diameter of the threaded end 32 of the outer sleeve is larger than the diameter of any section of the hemispherical section 33; the semispherical end steel bar 1 is inserted from the threaded end 32 of the outer sleeve and extends out of the truncated cone-shaped cross section 31 of the outer sleeve, the semispherical end 12 of the semispherical end steel bar 1 is clamped in the outer sleeve 3 and is connected with the semispherical cross section 33, the semispherical end steel bar 1 can swing within the range of the swing angle of the truncated cone-shaped cross section 31 of the outer sleeve, the swing angle is the included angle theta between the truncated cone-shaped cross section 31 of the outer sleeve and a central plane, and the central plane is the horizontal plane of the intersection point of the truncated; the connection between the hemispherical end steel bar 1 and the outer sleeve 3 forms a single hinge rotating in a swing angle theta; the value of the swing angle theta is 2-20 degrees; the inner threads 42 of the inner sleeve 4 are threadedly connected with the first end threaded steel bar 2, and the outer threads 41 of the inner sleeve 4 are threadedly connected with the outer sleeve threaded end 32; the hemispherical-end reinforcing thread 13 and the second end-threaded reinforcing thread 6 of the hemispherical-end reinforcing bar 1 are threadedly connected with the first double-sleeve threaded end 51 and the second double-sleeve threaded end 52 of the double sleeve 5, respectively.
The processing of the hemispherical end reinforcing steel bar thread 13, the first end part threaded reinforcing steel bar 2 and the second end part threaded reinforcing steel bar 6 meets the requirement of 'concrete structure engineering construction quality acceptance standard'.
The first double-sleeve threaded end 51, the second double-sleeve threaded end 52, the outer-sleeve threaded end 32, the outer threads 41 and the inner threads 42 of the inner sleeve 4 of the double-sleeve 5 are also processed to meet the requirements of mechanical connection technical code of reinforcing steel bars on the length of the threads of the sleeve and the distance between the threads.
The length of the thread tapping section of the first end part of the threaded steel bar 2 is greater than that of the inner sleeve 3; the length of the threaded tapping section of the second end-section rebar 6 is greater than the length of the second double-sleeve threaded end 52.
The thread length of the first end part threaded steel bar 2 is greater than that of the first double-sleeve threaded end 51 of the inner sleeve 3; the length of the threaded tapping section of the second end-section rebar 6 is greater than the length of the second double-sleeve threaded end 52.
The maximum diameter of the hemispherical end 12 is larger than the minimum circular section diameter of the truncated cone-shaped section 31 of the outer sleeve 3 and at least exceeds 6mm, so that the hemispherical end 12 can be clamped on the conical inclined surface of the outer sleeve 3 and cannot be pulled out, and enough strength is provided for ensuring the force transmission of the steel bar.
As shown in fig. 1 and 2, the diameter of the hemispherical head 12 is larger than the opening diameter of the truncated cone-shaped section of the 31 sleeve of the outer sleeve 3 and at least exceeds 6mm, so as to ensure that the hemispherical head 12 can be clamped on the conical inclined surface of the outer sleeve 3, cannot be pulled out and has enough strength to ensure the force transmission of the steel bar.
As shown in fig. 3 and 4, the length of the tapping section of the first end portion of the steel bar 2 is greater than that of the inner sleeve 3, so as to ensure the connection strength between the steel bar 2 and the inner sleeve 3 and ensure the force transmission between the steel bars; the length of the thread tapping section of the second end part threaded steel bar 6 is greater than that of the double sleeve 5, so that the connection strength of the end part threaded steel bar 6 and the double sleeve 5 is guaranteed, and sufficient strength is provided for guaranteeing the force transmission between the steel bars.
As shown in fig. 5 and 6, the outer sleeve 3 is sized according to the diameter of the connecting bar, hot-rolled by a die to have a uniform wall thickness, and then machined with a tapered slope and a thread by a lathe. The outer sleeve 3 is prepared by hot rolling and forming; the outer sleeve circular truncated cone-shaped section 31 is formed by machining a conical inclined plane through a lathe; the outer sleeve threaded end 32 is typically formed by turning, milling, tapping, threading, grinding, lapping, and whirling; the hemispherical section 33 is shaped by hot roll forming.
As shown in fig. 7 and 8, the inner sleeve 4 is provided with connecting threads on both the outside and the inside, respectively an outside thread 41 and an inside thread 42; the external thread 41 is used for connecting the outer sleeve 3, and the internal thread 42 is used for connecting the end-part threaded steel bar 2, so that effective steel bar mechanical connection is ensured. The distance between the maximum circular section of the hemispherical end 12 of the hemispherical end steel bar and the inner sleeve is 2-10 mm.
As shown in fig. 9 and 10, the double sleeve 5 has a first double-sleeve threaded end 51 at one end for connecting the second end-threaded steel bar 6, and a second double-sleeve threaded end 52 at the other end for connecting the steel bar segment 11 of the hemispherical-end steel bar 1. The shortest distance between the first double-sleeve threaded end and the second double-sleeve threaded end of the double sleeve is called a double-sleeve gap, and the value range of the double-sleeve gap is 2-30 mm.
The outer sleeve 3 has a truncated cone-shaped cross section 31 for allowing the hemispherical end rebar to swing around the hemispherical end 12 at the truncated cone-shaped cross section 31 within a range of swing angles. Hemisphere end reinforcing bar 1 passes through the inner skleeve and is connected on same straight line with outer sleeve and first end threaded reinforcement 2, and hemisphere end reinforcing bar 1 can swing at the swing angle within range in 31 departments of round platform shape cross-section, and rotatory hemisphere end reinforcing bar 1 is connected through double sleeve and second end threaded reinforcement 6, just so realizes carrying out the dislocation connection between first end threaded reinforcement 2 and the lower second end threaded reinforcement 6, just so can reduce the requirement of construction precision.
Examples
The superposed beams can be in butt joint connection, longitudinal steel bars at the lower parts of the beams are in mechanical connection, grouting sleeve connection and welding connection in a post-pouring section, wherein the steel bar connection length required by the mechanical connection is short, but the mechanical connection has extremely high requirements on the manufacturing accuracy of components, and if deviation occurs, the later-stage deviation rectifying process is extremely complex; and by adopting welding connection, a heat affected zone is arranged near a welding seam, the material at the position becomes brittle, welding residual stress and residual strain are easy to generate, cracks are easy to expand, and the fracture is easy to break at low temperature. Aiming at the problems, the prior art mainly adopts a grouting sleeve connection technology, the grouting sleeve connection needs to separate a grouting process of steel bar connection and concrete pouring of member connection, the construction process is extremely complicated, the precision requirement is high, the grouting sleeve is high in manufacturing cost, and the grouting sleeve is not suitable for large-area use. In the work progress, grout muffjoint appears about connecting reinforcement not on same straight line easily, great deviation appears. Meanwhile, due to construction errors, the upper cross section and the lower cross section of the joint of the components are not parallel, so that the upper connecting steel bar and the lower connecting steel bar are too long or too short.
Aiming at the defects of high precision requirement and high manufacturing cost of the mechanical sleeve connection mode, the invention provides the assembled single-hinge steel bar mechanical sleeve connection node which can swing within a swing angle range, has a large swing angle, can avoid construction errors caused by different straight lines of upper and lower connection steel bars and errors caused by overlong or overlong short steel bars to be connected, and can realize quick assembly of the node by adopting double-sleeve connection.
As shown in fig. 12 and 13, the precast beam 7 has an upper longitudinal rib and a lower longitudinal rib, the two upper longitudinal ribs are through-length longitudinal ribs inserted after hoisting, the lower longitudinal rib is a to-be-connected longitudinal rib of a cast-in-place part of the precast test piece, four to-be-connected longitudinal ribs are provided in fig. 12 and 13, two connecting nodes of the present invention are required to connect the two longitudinal ribs two by two, and meanwhile, the lower to-be-connected longitudinal rib is a tensile longitudinal rib of the precast beam 7 for bearing the bending moment applied to the test piece. And respectively hoisting the two corresponding prefabricated parts of the prefabricated beam 7 to the designed designated positions on the project site, placing the longitudinal bars to be connected at the lower part on the same axis, and starting assembling the nodes after positioning and rechecking without errors. The hemispherical end rebar 1 is first inserted from the threaded end 32 of the outer sleeve, protruding from the truncated cone-shaped section 31 of the outer sleeve, so that the outer sleeve 3 restrains the hemispherical end rebar 1. The inside threads 42 of the inner sleeve 4 are tightened with the threads of the first end threaded rebar 2, and then the outside threads 41 of the inner sleeve 4 are tightened with the outer sleeve threaded end 32. And completing the upper node connection. The threads 13 and 52 of the steel bar with the thread at the second end of the steel bar 1 are respectively screwed with the first double-sleeve thread end 51 and the second double-sleeve thread end 52 of the double-sleeve 5, so that the connection of the lower node is completed, the assembly is completed, and the construction of the whole connection node is completed.
The existing technology is mainly a grouting sleeve connection technology, the grouting sleeve connection needs to separate a grouting process of steel bar connection and concrete pouring of member connection, the construction process is extremely complicated, the precision requirement is high, the grouting sleeve is high in manufacturing cost, and the grouting sleeve is not suitable for large-area use. In the work progress, grout muffjoint appears about connecting reinforcement not on same straight line easily, great deviation appears. Meanwhile, due to construction errors, the upper cross section and the lower cross section of the joint of the components are not parallel, so that the upper connecting steel bar and the lower connecting steel bar are too long or too short. In order to overcome the defects of the prior art, the node can swing within the range of the swing angle, so that the upper steel bar and the lower steel bar can be connected in a staggered mode, the construction precision reading requirement is low, the node can be popularized in a large range, and the connection is better than that of the existing grouting sleeve.
In the assembled double-hinge steel bar mechanical sleeve connecting node, the hemispherical end 12 of the hemispherical end steel bar 1 is limited and restrained in the combined sleeve composed of the outer sleeve 3 and the inner sleeve 4, and the ends of the two hemispherical end steel bars are limited and restrained in the combined sleeve composed of the outer sleeve and the inner sleeve through the combined action of the inner sleeve and the outer sleeve, so that a single hinge capable of swinging within the range of a swinging angle is formed. Through the combined action of the double sleeves, the joint can be quickly assembled during construction. The node of the invention has low cost and low requirement on construction precision.
Finally, it should be noted that: the present invention is not limited to the above embodiments, and various other equivalent modifications, substitutions and alterations can be made without departing from the basic technical concept of the invention as described above, according to the common technical knowledge and conventional means in the field.
Claims (9)
1. An assembled hemispherical single-hinged steel bar mechanical sleeve connecting node is characterized by comprising a hemispherical end steel bar, a first end part threaded steel bar, an outer sleeve, an inner sleeve, a double sleeve and a second end part threaded steel bar; the first end part threaded steel bar and the second end part threaded steel bar are prefabricated components of steel bars to be connected; the hemispherical end steel bar comprises a steel bar section and a hemispherical end, the diameter of the steel bar section is smaller than that of any section of the hemispherical end, and the end part of the steel bar section is provided with a hemispherical end steel bar thread; the outer sleeve is a cylinder with a through hole, and the through hole is formed by sequentially connecting a threaded end of the outer sleeve, a hemispherical section and a truncated cone-shaped section of the outer sleeve; the threaded end of the outer sleeve is internally provided with internal threads in the through hole, the diameter of the truncated cone-shaped section of the outer sleeve is gradually reduced from the outside to the inside of the through hole, the hemispherical section is connected with the end with the smallest diameter of the truncated cone-shaped section of the outer sleeve and the threaded end of the outer sleeve, and the hollow diameter of the threaded end of the outer sleeve is larger than the diameter of any section of the hemispherical section; the semispherical end steel bar is inserted from the threaded end of the outer sleeve and extends out of the truncated cone-shaped cross section of the outer sleeve, the semispherical end of the semispherical end steel bar is clamped in the outer sleeve and is connected with the semispherical cross section, the semispherical end steel bar can swing within the range of the swing angle of the truncated cone-shaped cross section of the outer sleeve, the swing angle is the included angle theta between the truncated cone-shaped cross section of the outer sleeve and a central plane, and the central plane is the horizontal plane of the intersection point of the; the connection between the hemispherical end steel bar and the outer sleeve forms a single hinge rotating in a swing angle theta; the value of the swing angle theta is 2-20 degrees; the inner side thread of the inner sleeve is in threaded connection with the first end part of the steel bar with the thread, and the outer side thread of the inner sleeve is in threaded connection with the threaded end of the outer sleeve; the thread of the hemispherical end steel bar and the thread of the second end part of the hemispherical end steel bar are respectively in threaded connection with the first double-sleeve threaded end and the second double-sleeve threaded end of the double sleeve.
2. The fabricated hemispherical single-hinge steel bar mechanical sleeve connecting joint as claimed in claim 1, wherein the hemispherical end steel bar thread meets the requirements of "acceptance criteria for construction quality of concrete structure engineering".
3. The fabricated hemispherical single-hinged steel bar mechanical sleeve connection node as claimed in claim 1, wherein the first end portion threaded steel bar and the second end portion threaded steel bar meet the requirements of "acceptance criteria for construction quality of concrete structure engineering"; the length and the screw thread distance of the first double-sleeve threaded end and the second double-sleeve threaded end of the double sleeve meet the requirements of technical regulations on mechanical connection of steel bars.
4. The fabricated hemispherical mechanical rebar sleeve joint of claim 1, wherein the first end threaded rebar has a threaded length greater than a first double-sleeve threaded end length of the inner sleeve; the threaded tap length of the second end section of the threaded reinforcing bar is greater than the length of the threaded end of the second double sleeve.
5. The fabricated hemispherical mechanical rebar sleeve joint of claim 1, wherein the maximum diameter of the hemispherical end is greater than the minimum circular cross-sectional diameter of the frustroconical cross-section of the outer sleeve by at least 6 mm.
6. The fabricated hemispherical single-hinge mechanical rebar sleeve connection node as claimed in claim 1, wherein the lengths and the screw thread intervals of the outer thread of the inner sleeve, the inner thread and the threaded end of the outer sleeve meet the requirements of technical Specification for mechanical rebar connection.
7. The fabricated hemispherical single-knuckle mechanical sleeve joint of claim 1, wherein said outer sleeve is formed by hot-rolling; the outer sleeve circular truncated cone-shaped section is formed by processing a conical inclined plane through a lathe; the threaded end of the outer sleeve is usually formed by turning, milling, tapping, threading, grinding and whirlwind cutting; the hemispherical cross section is shaped by hot roll forming.
8. The fabricated hemispherical single-hinge mechanical rebar sleeve connection node of claim 1, wherein the distance between the largest circular cross section of the hemispherical end rebar and the inner sleeve is 2-10 mm.
9. The fabricated hemispherical single-twisted steel mechanical sleeve joint as claimed in claim 1, wherein the shortest distance between the first double-sleeve threaded end and the second double-sleeve threaded end of the double sleeve is a double-sleeve gap, and the length of the double-sleeve gap is 2-30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010650931.1A CN111691605A (en) | 2020-07-08 | 2020-07-08 | Assembled hemisphere single hinge reinforcing bar machinery sleeve connection node |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010650931.1A CN111691605A (en) | 2020-07-08 | 2020-07-08 | Assembled hemisphere single hinge reinforcing bar machinery sleeve connection node |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343258A (en) * | 2020-11-16 | 2021-02-09 | 上海市机械施工集团有限公司 | Combined connection device |
| CN114790797A (en) * | 2022-05-27 | 2022-07-26 | 重庆天蕴通工程科技有限公司 | Steel bar self-adaptive mechanical connecting device for assembly building |
-
2020
- 2020-07-08 CN CN202010650931.1A patent/CN111691605A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343258A (en) * | 2020-11-16 | 2021-02-09 | 上海市机械施工集团有限公司 | Combined connection device |
| CN114790797A (en) * | 2022-05-27 | 2022-07-26 | 重庆天蕴通工程科技有限公司 | Steel bar self-adaptive mechanical connecting device for assembly building |
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