CN114991488B - Self-prestress rod piece connector and steel bar connecting method using connector - Google Patents
Self-prestress rod piece connector and steel bar connecting method using connector Download PDFInfo
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- CN114991488B CN114991488B CN202210838196.6A CN202210838196A CN114991488B CN 114991488 B CN114991488 B CN 114991488B CN 202210838196 A CN202210838196 A CN 202210838196A CN 114991488 B CN114991488 B CN 114991488B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
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- Reinforcement Elements For Buildings (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
A self-prestress rod piece connector and a steel bar connecting method using the connector comprise an outer connecting assembly, an inner anchoring assembly, an inner connecting joint and a self-prestressing assembly, wherein the outer connecting assembly comprises an outer connecting sleeve and an outer connecting joint, the outer connecting joint is connected to the sealing end of the outer connecting sleeve, a threaded hole is formed in the top end of the outer connecting joint, a first rod piece is fastened in a threaded hole of the outer connecting joint through threads, the opening end of the outer connecting sleeve is connected with a sealing end cover through threads, the inner anchoring assembly is arranged in the outer connecting sleeve, one end of the inner connecting joint is connected with the inner anchoring assembly, the other end of the inner connecting joint is connected with a second rod piece through threads, and the self-prestressing assembly is installed between the inner anchoring assembly and the sealing end cover in the inner cavity of the outer connecting sleeve. The invention can better realize the prefabrication assembly or the modularization construction of engineering components, does not need to reserve a cast-in-place section, and really realizes the on-site rapid assembly of each prefabricated part of the structure.
Description
Technical Field
The invention relates to the technical field of connection of building reinforcing steel bars and rod pieces, in particular to a self-prestress rod piece connector and a reinforcing steel bar connection method using the connector.
Background
In the engineering production field, especially in the building engineering field, building structure's standardized design, modular production, assembly construction and intelligent application have obtained quick development, use more and more generally, and in the production construction process of prefabricated assembly formula, the ubiquitous member needs of connecting, and the most common is the connection of atress reinforcing bar.
In order to solve the connection problem of the embedded rod pieces in the prefabricated components, grouting sleeve connection and mechanical connection are commonly used in the field of constructional engineering. The connection quality of the grouting sleeve is difficult to ensure, instant connection cannot be realized, and the construction period is long; the mechanical connection mainly comprises threaded connection and welded connection, and the threaded connection and the welded connection are difficult to meet the connection of prefabricated components. Due to the influence of factors such as construction errors, the existing mechanical connection has the problems of loose connection, difficulty in directly applying to prefabricated assembled components, difficulty in applying prestress and uneven stress of connecting components at the same node.
Disclosure of Invention
The invention provides a rod piece connector which is convenient and quick in site operation, reliable in connection quality and capable of self-applying prestress to solve the problems, and provides a method for quickly and self-prestress connecting steel bars by using the connector.
The technical scheme adopted by the invention is as follows:
the utility model provides a from prestressing force member connector, including outer coupling assembling, interior anchor subassembly, interior attach fitting and from prestressing force subassembly, outer coupling assembling includes outer joint sleeve, outer joint fitting connects the seal end at outer joint sleeve, threaded hole is seted up on outer joint fitting's top, first member passes through the screw fastening in outer joint fitting's threaded hole, outer joint sleeve's open end has the closing end lid through threaded connection, interior anchor subassembly sets up in outer joint sleeve, interior attach fitting one end is connected with interior anchor subassembly, the other end and the second member threaded connection of interior attach fitting, from prestressing force subassembly installation between outer joint sleeve inner chamber's interior anchor subassembly and closing end lid.
The inner anchoring component comprises an inner connecting sleeve, an inner connecting fastener, a first inner spring and a second inner spring, the second inner spring and the first inner spring are connected to the top of an inner cavity of the outer connecting sleeve, the second inner spring is sleeved on the inner side of the first inner spring, the inner connecting sleeve is connected into the outer connecting sleeve through the first inner spring, a conical cavity is formed in the inner side of the inner connecting sleeve, and the inner connecting fastener is suspended in the conical cavity of the inner connecting sleeve through the second inner spring.
The inner connecting fastener is conical, and the gradient of the conical shape is the same as that of the inner side of the inner connecting sleeve.
One end of the inner connecting joint is petal-shaped, petal-shaped ends of the inner connecting joint are inserted into a gap between the inner connecting sleeve and the inner connecting fastener, the other end of the inner connecting joint is provided with a threaded hole, and the second rod piece is fastened in the threaded hole of the inner connecting joint through threads.
The outer side of the inner connecting joint is smooth in contact with the inner connecting sleeve, and the inner side of the inner connecting joint is in zigzag contact with the inner connecting fastener.
The self-prestressing assembly comprises a self-deformation gasket, a heating wire and a lead, the self-deformation gasket is positioned between the inner connecting sleeve and the end-sealing cover, the heating wire is wound on the outer side of the self-deformation gasket, and the heating wire is connected with an external power supply through the lead.
The outer diameter of the inner connecting sleeve is smaller than the inner diameter of the outer connecting sleeve.
The self-deformation gasket is made of shape memory alloy and is made of one-way shape memory alloy.
The one-way shape memory alloy is NiTi shape memory alloy.
The first inner spring is a spiral steel spring, and the second inner spring is a high-hardness polyurethane spring.
A method for connecting reinforcing bars using a self-prestressed bar coupler, comprising the steps of:
s1, calculating the stress-free deformation height delta of the self-deformation gasket according to the length L of the steel bar to be connected, the elastic modulus Eb of the steel bar and the target prestress sigma parameter:
Δ=(σ/Es)·H + (σ/Eb)·L + ΔS
h is the height of the self-deformation gasket which adopts shape memory alloy after the shape is recovered under the stress-free state, es is the elastic modulus of the self-deformation gasket, and Delta S is the additional deformation of the system;
s2, designing parameters of a self-deformation gasket according to the stress-free deformation height delta calculated in the step S1, and making a proper self-prestress rod piece connector;
s3, processing threads which can be matched with the inner connecting joint and the outer connecting joint at the end part of the steel bar to be connected, and enabling the steel bar to be connected with the inner connecting joint and the outer connecting joint respectively;
s4, axially aligning a first rod piece and a second rod piece, wherein the first rod piece is a first steel bar, the second rod piece is a second steel bar, the alignment error is within the allowable range of the self-prestress rod piece connector, and the internal connecting joint is inserted into the internal connecting sleeve to form butt joint so as to perform primary connection and fixation on the steel bars;
and S5, connecting a lead with a power supply, heating the electric heating wire, and changing the heated shape of the self-deformation gasket to realize self-prestress and finish the connection of the reinforcing steel bars.
The invention has the beneficial effects that: the invention can better realize the prefabrication assembly or the modularization construction of engineering components, does not need to reserve a cast-in-place section, and really realizes the on-site rapid assembly of each prefabricated part of the structure; the processing and most of the connecting procedures of the rod connecting end can be finished in a factory, so that the field workload is reduced; the site operation is simple, the requirement on construction equipment is low, the requirement on the site is low, the operation of workers is simple, and the construction speed is high; the requirement on the centering of the rod piece is low, the connecting rod piece is allowed to have a certain deviation, the installation is rapid and convenient, and the quality is reliable and measurable. The application of self-prestress can be realized, the application range is expanded, and the firmness and the reliability of connection are ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention before rod connection.
Fig. 2 is a schematic structural view of the present invention after the connection of the rods.
FIG. 3 is a schematic view of the contact relationship between the inner joint and the inner sleeve and the inner fastening member according to the present invention.
Fig. 4 is a front view of the self-deforming gasket of the present invention prior to deformation by heat.
Fig. 5 is a top view of the self-deforming gasket of the present invention prior to deformation by heat.
Fig. 6 is a front view of the self-deforming gasket after deformation by heat in accordance with the present invention.
Fig. 7 is a top view of the self-deforming gasket of the present invention after deformation by heat.
FIG. 8 is a cross-sectional view of a petal-shaped end of an internal connection joint of the present invention.
Wherein: 1-self-deforming gasket; 2-inner connecting sleeve; 3-inner connection joint; 4-a first inner spring; 5-electric heating wire; 6-a second inner spring; 7-internal connection fasteners; 8-an outer connecting sleeve; 9-external connection joint; 10-sealing the end cover; 11-a first bar; 12-a wire; 13-second bar.
Detailed Description
The utility model provides a from prestressing force member connector, including outer coupling assembling, interior anchor subassembly, interior attach fitting 3 and from prestressing force subassembly, outer coupling assembling includes outer joint sleeve 8, outer attach fitting 9 is connected at outer joint sleeve 8's seal end, threaded hole is seted up on outer attach fitting 9's top, first member 11 passes through the threaded fastening in outer attach fitting 9's threaded hole, outer joint sleeve 8's open end has end cover 10 through threaded connection, interior anchor subassembly sets up in outer joint sleeve 8, 3 one end of interior attach fitting are connected with interior anchor subassembly, the other end and the 13 threaded connection of second member of interior attach fitting 3, install between interior anchor subassembly and end cover 10 in outer joint sleeve 8 inner chamber from prestressing force subassembly.
The inner anchoring component comprises an inner connecting sleeve 2, an inner connecting fastener 7, a first inner spring 4 and a second inner spring 6, the second inner spring 6 and the first inner spring 4 are connected to the top of an inner cavity of an outer connecting sleeve 8, the second inner spring 6 is sleeved on the inner side of the first inner spring 4, the inner connecting sleeve 2 is connected into the outer connecting sleeve 8 through the first inner spring 4, the inner side of the inner connecting sleeve 2 is a conical cavity, and the inner connecting fastener 7 is suspended in the conical cavity of the inner connecting sleeve 2 through the second inner spring 6.
The inner connecting fastener 7 is conical, and the gradient of the conical shape is the same as that of the conical shape on the inner side of the inner connecting sleeve 2.
Interconnection attach fitting 3 one end be the petal form, in the space between connecting sleeve 2 and interconnection connecting fastener 7 including the grafting of interconnection attach fitting 3's petal form end, threaded hole is seted up to interconnection attach fitting 3's the other end, the threaded hole of attach fitting 3 including second member 13 passes through the screw-thread fastening, during the use, the space between interconnection connecting sleeve 2 and interconnection connecting fastener 7 can be inserted to interconnection attach fitting 3's petal form one end, insert the in-process, petal form end opens gradually, form the awl slope unanimous with interconnection connecting sleeve 2. In the process that the inner connecting joint 3 is inserted into a gap between the inner connecting sleeve 2 and the inner connecting fastener 7, the inner spring forms pushing force, and the inner connecting fastener 7 is attached to the inner connecting joint 3.
The contact surface between the outer side of the inner connecting joint 3 and the inner connecting sleeve 2 is smooth, and the inner side of the inner connecting joint 3 is in zigzag contact with the inner connecting fastener 7.
The self-prestressing assembly comprises a self-deformation gasket 1, a heating wire 5 and a lead 12, the self-deformation gasket 1 is positioned between the inner connecting sleeve 2 and the end-sealing cover 10, the heating wire 5 is wound on the outer side of the self-deformation gasket 1, and the heating wire 5 is connected with an external power supply through the lead 12. The self-deformation gasket 1 is made of shape memory alloy materials and is made of one-way shape memory alloy. The self-deformation gasket 1 is made of NiTi shape memory alloy. The self-deformation gasket 1 is made of shape memory alloy materials and can deform after being heated by the heating wire 5, so that the height of the self-deformation gasket 1 changes, the inner connecting sleeve 2 is tightly propped against the self-prestress application, and the self-prestress application is carried out after the inner connecting joint 3 is completely inserted into the inner anchoring component.
The outer diameter of the inner connecting sleeve 2 is smaller than the inner diameter of the outer connecting sleeve 8, so that the first rod piece 11 and the second rod piece 13 can be allowed to be axially misaligned, the butt joint can still be reliably realized when certain deviation exists, and the construction tolerance is improved.
First inner spring 4 choose for use the heliciform steel spring, connecting sleeve 2 and the inseparable laminating from the deformation packing ring 1 in first inner spring 4 guarantees, high rigidity polyurethane spring is chooseed for use to second inner spring 6, both can guarantee the inseparable laminating of the tight in-process of mutual top between inner joint 3 and the interior connecting fastener 7, can realize again that the reliability of guaranteeing to connect after applying elasticity after the top is tight.
A method for connecting reinforcing bars using a self-prestressed bar coupler, comprising the steps of:
s1, calculating the stress-free deformation height delta of the self-deformation gasket 1 according to the length L of the steel bar to be connected, the elastic modulus Eb of the steel bar and the target prestress sigma parameter.
Δ=(σ/Es)·H + (σ/Eb)·L + ΔS
H is the height of the self-deformation gasket 1 made of shape memory alloy after shape recovery in an unstressed state, es is the elastic modulus of the self-deformation gasket 1, and Delta S is the additional deformation of the system;
s2, according to the stress-free deformation height delta calculated in the step S1, carrying out parameter design on a self-deformation gasket 1, and making a proper self-prestress rod piece connector;
s3, processing threads which can be matched with the inner connecting joint 3 and the outer connecting joint 9 at the end part of the steel bar to be connected, and respectively connecting the steel bar to be connected with the inner connecting joint 3 and the outer connecting joint 9;
s4, axially aligning a first rod piece 11 and a second rod piece 13, wherein the first rod piece 11 is a first reinforcing steel bar, the second rod piece 13 is a second reinforcing steel bar, the alignment error is within the allowable range of the self-prestress rod piece connector, and the inner connecting joint 3 is inserted into the inner connecting sleeve 2 to form butt joint so as to perform primary connection and fixation on the reinforcing steel bars;
s5, the lead 12 is connected with a power supply to heat the electric heating wire 5, the heated shape of the self-deformation gasket 1 is changed, self-prestress is realized, and steel bar connection is completed.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (4)
1. The self-prestress rod piece connector is characterized by comprising an outer connecting assembly, an inner anchoring assembly, an inner connecting joint (3) and a self-prestress assembly, wherein the outer connecting assembly comprises an outer connecting sleeve (8) and an outer connecting joint (9), the outer connecting joint (9) is connected to the sealing end of the outer connecting sleeve (8), a threaded hole is formed in the top end of the outer connecting joint (9), a first rod piece (11) is fastened in the threaded hole of the outer connecting joint (9) through threads, the open end of the outer connecting sleeve (8) is connected with a sealing end cover (10) through threads, the inner anchoring assembly is arranged in the outer connecting sleeve (8), one end of the inner connecting joint (3) is connected with the inner anchoring assembly, the other end of the inner connecting joint (3) is connected with a second rod piece (13) through threads, and the self-prestress assembly is arranged between the inner anchoring assembly and the sealing end cover (10) in the inner cavity of the outer connecting sleeve (8);
the inner anchoring component comprises an inner connecting sleeve (2), an inner connecting fastener (7), a first inner spring (4) and a second inner spring (6), the second inner spring (6) and the first inner spring (4) are connected to the top of an inner cavity of the outer connecting sleeve (8), the second inner spring (6) is sleeved on the inner side of the first inner spring (4), the inner connecting sleeve (2) is connected into the outer connecting sleeve (8) through the first inner spring (4), the inner side of the inner connecting sleeve (2) is a conical cavity, and the inner connecting fastener (7) is suspended in the conical cavity of the inner connecting sleeve (2) through the second inner spring (6);
the inner connecting fastener (7) is conical, and the gradient of the conical shape is the same as that of the inner side of the inner connecting sleeve (2);
one end of the inner connecting joint (3) is petal-shaped, the petal-shaped end of the inner connecting joint (3) is inserted into a gap between the inner connecting sleeve (2) and the inner connecting fastener (7), the other end of the inner connecting joint (3) is provided with a threaded hole, and the second rod piece (13) is fastened in the threaded hole of the inner connecting joint (3) through threads;
the contact surface between the outer side of the inner connecting joint (3) and the inner connecting sleeve (2) is smooth, and the inner side of the inner connecting joint (3) is in zigzag contact with the inner connecting fastener (7);
the self-prestressing assembly comprises a self-deformation gasket (1), a heating wire (5) and a lead (12), the self-deformation gasket (1) is positioned between the inner connecting sleeve (2) and the end-sealing cover (10), the heating wire (5) is wound on the outer side of the self-deformation gasket (1), and the heating wire (5) is connected with an external power supply through the lead (12);
the outer diameter of the inner connecting sleeve (2) is smaller than the inner diameter of the outer connecting sleeve (8).
2. Self-prestressed rod connector according to claim 1, characterized in that said self-deforming washer (1) is made of shape memory alloy material, and is made of one-way shape memory alloy, and is made of NiTi shape memory alloy.
3. A self-prestressing connector according to claim 2, wherein the first internal spring (4) is a high-stiffness polyurethane spring and the second internal spring (6) is a helical steel spring.
4. A reinforcing bar connecting method using the self-prestressing force rod connector of claim 1, comprising the steps of:
s1, calculating the stress-free deformation height delta of the self-deformation gasket (1) according to the length L of the steel bar to be connected, the elastic modulus Eb of the steel bar and the target prestress sigma parameter:
Δ=(σ/Es)·H + (σ/Eb)·L + ΔS
h is the height of the self-deformation gasket (1) made of shape memory alloy after shape recovery in an unstressed state, es is the elastic modulus of the self-deformation gasket (1), and Delta S is the additional deformation of the system;
s2, according to the stress-free deformation height delta calculated in the step S1, carrying out parameter design on a self-deformation gasket (1) and formulating a proper self-prestress rod piece connector;
s3, processing threads which can be matched with the inner connecting joint (3) and the outer connecting joint (9) at the end part of the steel bar to be connected, and respectively connecting the steel bar to be connected with the inner connecting joint (3) and the outer connecting joint (9);
s4, axially aligning a first rod piece (11) and a second rod piece (13), namely a first steel bar and a second steel bar, inserting an internal connection joint (3) into an internal connection sleeve (2) to form butt joint when the alignment error is within the allowable range of the self-prestress rod piece connector, and performing primary connection and fixation on the steel bars;
and S5, connecting a lead (12) with a power supply, heating the electric heating wire (5), and changing the heated shape of the self-deformation gasket (1) to realize self-prestress and finish the connection of the steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838196.6A CN114991488B (en) | 2022-07-18 | 2022-07-18 | Self-prestress rod piece connector and steel bar connecting method using connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838196.6A CN114991488B (en) | 2022-07-18 | 2022-07-18 | Self-prestress rod piece connector and steel bar connecting method using connector |
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| Publication Number | Publication Date |
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| CN114991488A CN114991488A (en) | 2022-09-02 |
| CN114991488B true CN114991488B (en) | 2022-11-25 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6761002B1 (en) * | 2002-12-03 | 2004-07-13 | Felix L. Sorkin | Connector assembly for intermediate post-tension anchorage system |
| KR101456825B1 (en) * | 2014-05-21 | 2014-10-31 | 김용근 | Reinforcing bar coupler with pair of locking piece and connecting method of pre-assembled rebar cage using thereof |
| CN104033466B (en) * | 2014-05-27 | 2016-11-16 | 潍柴动力股份有限公司 | A kind of screwed assembly |
| CN205444181U (en) * | 2016-01-05 | 2016-08-10 | 袁江 | Cast member connector |
| RU165841U1 (en) * | 2016-03-29 | 2016-11-10 | Василий Сергеевич Феоктистов | DRUM-BRAKE BRAKE |
| CN109128894B (en) * | 2017-06-28 | 2024-03-19 | 杨斌堂 | Pipe clamping mechanism |
| CN108331263B (en) * | 2018-04-20 | 2019-11-12 | 上海市城市建设设计研究总院（集团）有限公司 | Self-locking mechanical connects sleeve |
| CN109853859A (en) * | 2019-01-31 | 2019-06-07 | 上海易拼利联建筑科技有限责任公司 | A kind of ring-like anchoring deviation rod piece connector of elastomeric composition |
| CN109915447A (en) * | 2019-04-13 | 2019-06-21 | 上海易拼利联建筑科技有限责任公司 | A kind of composite bushing deviation rod piece connector |
| CN110258962A (en) * | 2019-07-14 | 2019-09-20 | 上海易拼利联建筑科技有限责任公司 | A kind of cone-shaped clip gear drive deviation reinforcing bar connector |
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