CN106437037A - Extruding grouting sleeve used for connection of steel bar and extruding manufacturing method thereof - Google Patents
Extruding grouting sleeve used for connection of steel bar and extruding manufacturing method thereof Download PDFInfo
- Publication number
- CN106437037A CN106437037A CN201610879803.8A CN201610879803A CN106437037A CN 106437037 A CN106437037 A CN 106437037A CN 201610879803 A CN201610879803 A CN 201610879803A CN 106437037 A CN106437037 A CN 106437037A
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- steel pipe
- port
- extruding
- grout sleeve
- grout
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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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses an extruding grouting sleeve used for connection of steel bar and an extruding manufacturing method thereof, and belongs to the field of constructional engineering. The extruding grouting sleeve comprises a cylinder body steel tube and two ports which are subjected to extruded forming and are arranged on two ends of the cylinder body steel tube, wherein a thick liquid inlet and a thick liquid outlet are arranged on the side wall of the cylinder body steel tube, the thick liquid inlet and the thick liquid outlet are arranged on the two ends of the cylinder body steel tube respectively, the inner sides of the thick liquid inlet and the thick liquid outlet are connected to a thick liquid inlet guiding tube and a thick liquid outlet guiding tube respectively through internal threads; the extruding manufacturing method comprises the steps of tube choosing, extruding, drilling, tapping and the like. According to the extruding manufacturing method, cold extruding is only needed to be conducted on the two sides of the steel tube, and there is no need to conduct cutting and processing on the inner wall of the steel tube. The extruding grouting sleeve used for connection of steel bar and the extruding manufacturing method thereof has the advantages of being easy in material obtaining, simple in manufacturing and processing, high in production efficiency and low in cost.
Description
Technical field
The present invention relates to construction engineering technical field, specifically, is to be related to a kind of bar connecting extruding grout sleeve
And its extruding method for making.
Background technology
Due to prefabricated concrete structure building, in city residential construction, construction environmental protection, low energy consumption, construction period are short
Feature and advantage, state lives the portion of building and has put into effect a series of corresponding technical specifications and product standard.With Related product country
Industry standard is issued and implemented successively, and corresponding design, construction reference have actively been put into effect in some places, adds the policy of government aspect
Factor, China's prefabricated concrete structure application comes into the high speed development stage.
Prefabricated concrete structure is built during design and construction, and the bar connecting of precast concrete is used
Grout sleeve and high strength cement base grouting material are carried out.Cast form is adopted the grout sleeve that prior art is used more, used
The inwall of grout sleeve form the inner-cavity structure of correlation and determine tension and resistance to compression, the shear resistance of sleeve, barrel bore is tied
Structure is had a significant impact to the confinement mechanism of sleeve and stress distribution, and sleeve stress distribution is corresponding with inner-cavity structure, in smooth section and
Deformation section shows different rules；Sleeve to the constraint of grouting material essentially from inwall convex hole rib mutual extruding force perpendicular
To component, smooth section cleaves the size of deformation to the constraint of grouting material depending on grouting material.Therefore, need in Design and Machining
Sleeve lining processes the fin of multiple tracks, must also process an excessive silk of connection for sleeve and overlap during the processing of half grout sleeve
Head, produces molding using ductile cast iron material, as the material of spheroidal graphite cast-iron needs to carry out formula, unstable in material quality
When, needing to adjust the mechanical property requirements that formula meets product, the formula adjustment process before production is longer, and production technology is more multiple
Miscellaneous, and ductile cast iron material is expensive, product with material more when, the cost performance of product is relatively low.
Disadvantages described above, is worth improving.
Content of the invention
In order to overcome the shortcomings of existing technology, the present invention provides a kind of bar connecting extruding grout sleeve and its extruding
Manufacture method.
Technical solution of the present invention is as described below：
A kind of bar connecting extruding grout sleeve, it is characterised in that including cylinder steel pipe, the two ends of the cylinder steel pipe are respectively
The port being extruded together is provided with, at least the internal diameter of a port is more than the diameter of connection reinforcing bar, two ports
Between length no less than connection 5 times of bar diameter.
The side wall of the steel pipe cylinder is provided with stock inlet and grout outlet, and the stock inlet and the grout outlet are respectively arranged on
The cylinder steel pipe is provided with the interior spiral shell of A/C near the position at two ends, the inner side of the stock inlet and the grout outlet
Stricture of vagina, the stock inlet and the grout outlet connect respectively into slurry guiding tube and pulp guiding tube.
The present invention according to said structure, it is characterised in that the port is provided with plug, forms full grout sleeve, and
Length between two ports is no less than 10 times of connection bar diameter.
The present invention according to said structure, it is characterised in that in two ports, the inner side of one of them be provided with
The screw thread silk head of the steel bar head coupling of connection reinforcing bar, the length for being formed between half grout sleeve, and two ports is many
5 times in connection bar diameter.
The present invention according to said structure, it is characterised in that the stock inlet and the grout outlet are located at homonymy or offside.
The present invention according to said structure, it is characterised in that the port and the cylinder steel pipe are integrally formed, the end
The outer wall dimension of mouth is less than the outer wall dimension of the cylinder steel pipe, and its outer wall shape parallel is in the outer wall shape of the cylinder steel pipe
Shape.
The present invention according to said structure, it is characterised in that the port and the cylinder steel pipe are integrally formed, the end
The outer wall dimension of mouth is less than the outer wall dimension of the cylinder steel pipe, and its outer wall shape is not parallel to the outer wall of the cylinder steel pipe
Shape so that the grout sleeve of molding is in the little fusiformis structure broad in the middle in two.
A kind of bar connecting extruding method for making of extruding grout sleeve, it is characterised in that comprise the following steps：
S1：Required according to product design, choose the steel pipe of fixed diameter and wall thickness；
S2：The two ends of the steel pipe are respectively put in extrusion equipment carries out cold extrusion so that the two ends of the steel pipe produce change
Shape and be contracted to required diameter formed port；
S3：Drilled in the position near the steel pipe two ends respectively, a wherein stomidium is the stock inlet for pouring into mortar, the other end
Hole becomes bar connecting grout sleeve as grout outlet or air vent.
The internal diameter of the present invention according to such scheme, it is characterised in that in step S2, at least a port
Diameter than connecting reinforcing bar is big so that leave gap between the two, to form grouting cavity.
The present invention according to such scheme, it is characterised in that also include step S4：Two ends in the steel pipe for processing
Plug being mixed, and slurry guiding tube and pulp guiding tube is installed at the stock inlet and the grout outlet, forms full grouting set
Cylinder.
The present invention according to such scheme, it is characterised in that also include step S4：By in the port of wherein one end
The screw thread silk head with the steel bar head coupling for being connected reinforcing bar is processed in side, and pacifies at the stock inlet and the grout outlet respectively
Slurry guiding tube and pulp guiding tube is put into, forms half grout sleeve.
According to the present invention of such scheme, its advantage is, the present invention only need to carry out cold extrusion to the two ends of steel pipe,
The machining of complexity need not be carried out to the inwall of steel pipe, easily obtained with material, fabrication and processing is simple, production efficiency
High, lower-cost feature.Further, various alloy pipes, highstrenghtpiston's steel pipe can also be adopted, and extrusion process is permissible
Be cold working, or hot-working adopted to extruded segment, draw materials conveniently, processing simple, with processing charges are cheap, processing efficiency
High feature.
Description of the drawings
Fig. 1 is the structural representation that in the embodiment of the present invention one, stock inlet and grout outlet are located at the same side.
Fig. 2 is the structural representation that in the embodiment of the present invention one, stock inlet and grout outlet are located at not homonymy.
Fig. 3 is the structural representation that in the embodiment of the present invention two, stock inlet and grout outlet are located at the same side.
Fig. 4 is the structural representation that in the embodiment of the present invention two, stock inlet and grout outlet are located at not homonymy.
In in figure, 1, cylinder steel pipe；2nd, port；3rd, port；4th, silk thread mouth；5th, stock inlet；6th, grout outlet；7th, interior spiral shell
Stricture of vagina；8th, female thread.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is conducted further description to the present invention：
Embodiment one
As shown in figure 1, a kind of bar connecting squash type grout sleeve, including the cylinder steel pipe 1 with stretching resistance, cylinder steel pipe
1 port 2,3 for being respectively arranged at two ends with the certain length for reducing, it is preferred that port 2,3 and cylinder steel pipe 1 are integrally formed, and
Port 2,3 is formed by extruding.
2 inner side of port is provided with the screw thread silk 4 with the steel bar head coupling for being connected reinforcing bar, and the length of screw thread silk 4 is for even
1-2 times of bar diameter is connect, is connected with steel bar head, its design strength, reach the requirement of JGJ107 one-level joint.
The internal diameter of port 3 is more than connection reinforcing bar（In figure is not shown, similarly hereinafter）Diameter so that port 3 be connected reinforcing bar it
Between leave gap, be provided with plug at port 3（In figure is not shown, similarly hereinafter）, it is that reinforcing bar anchors into end, 2 diameter of port is less than connection steel
The diameter of muscle, port 2 forms screw thread silk 4 after carrying out mechanical tapping processing, is the mechanical connection end of sleeve.
The length sum of two ports 2,3 is less than the length of cylinder steel pipe 1, and the length between port 2 and port 3 is for being connected
More than 5 times of bar diameter.
The side wall of steel pipe cylinder 1 is provided with stock inlet 5 and grout outlet 6, and stock inlet 5 and grout outlet 6 are respectively arranged on cylinder steel
Pipe 1 is near the position at two ends, and the inner side of stock inlet 5 and grout outlet 6 is provided with the female thread 7,8 of A/C, stock inlet 5 and goes out
Slurry mouth 6 connects respectively into slurry guiding tube and pulp guiding tube, forms half grout sleeve.
Generally, in the present embodiment, stock inlet 5 and grout outlet 6 are located at homonymy.When adopting in prefabricated components
During multiple sleeves, the high strength grout injection of grout sleeve, reduces the length of grout hole and slurry outlet for convenience, convenient filling
Slurry operation construction, stock inlet 5 and grout outlet 6 can not be located at homonymy.
In the present embodiment, the port and the cylinder steel pipe are integrally formed, and the outer wall dimension of the port is less than institute
The outer wall dimension of cylinder steel pipe is stated, and its outer wall shape parallel is in the outer wall shape of the cylinder steel pipe.In different production requirements
Under, the shape of the port can also be：The outer wall dimension of the port is less than the outer wall dimension of the cylinder steel pipe, and outside which
Wall shape is not parallel to the outer wall shape of the cylinder steel pipe so that the grout sleeve of molding little fusiformis knot broad in the middle in two
Structure.
The extruding method for making of the extruding grout sleeve, comprises the following steps：
S1：Choose the steel pipe of fixed diameter and wall thickness；
S2：The two ends of steel pipe are respectively put in extrusion equipment carries out cold extrusion so that the two ends of steel pipe are deformed and reduce
Port 2,3 is formed to required diameter, the internal diameter after port of steel pipe 3 reduces is bigger than the diameter of reinforcing bar so that between leaving between the two
Gap, to form grouting cavity, eventually becomes bar connecting grout sleeve；
S3：Drilled in the position at the two ends near steel pipe respectively, a wherein stomidium is the stock inlet 5 for pouring into mortar, the other end
Hole is used as grout outlet 6 or air vent；
S4：Steel bar head 4 is processed in the port 2 for being formed；
S5：Plug being mixed in the port 3 of the steel pipe for processing, and slurry guiding tube is installed at stock inlet 5 and grout outlet 6 and is gone out
Slurry guiding tube, forms half grout sleeve.
As shown in Fig. 2 from unlike half grout sleeve shown in Fig. 1, in fig. 2,5 He of stock inlet of half grout sleeve
Grout outlet 6 is located at opposed both sides.
Embodiment two
As shown in figure 3, a kind of bar connecting extruding grout sleeve, including the cylinder steel pipe 1 with stretching resistance, cylinder steel pipe 1
Be respectively arranged at two ends with the port 2,3 for reducing, it is preferred that port 2,3 and cylinder steel pipe 1 are integrally formed, and port 2,3 passes through
Extruding is formed.
Port 2,3 is with shearing resistance and compressive resistance, and the internal diameter of port 2,3 is more than connection reinforcing bar（In figure is not shown, similarly hereinafter）'s
Diameter so that gap is left with being connected between reinforcing bar in port 2,3, the length of two ports 2,3 and the length less than cylinder steel pipe 1
Degree.
The side wall of steel pipe cylinder 1 is provided with stock inlet 5 and grout outlet 6, and stock inlet 5 and grout outlet 6 are respectively arranged on cylinder steel
Pipe 1 is near the position at two ends, and the inner side of stock inlet 5 and grout outlet 6 is provided with the female thread 7,8 of A/C, stock inlet 5 and goes out
Slurry mouth 6 connects respectively into slurry guiding tube and pulp guiding tube, forms full grout sleeve.
Preferably, in the present embodiment, stock inlet 5 and grout outlet 6 are located at homonymy.
The extruding method for making of the extruding grout sleeve, comprises the following steps：
S1：Choose the steel pipe of fixed diameter and wall thickness；
S2：Drilled in the position at the two ends near steel pipe respectively, a wherein stomidium is the stock inlet 5 for pouring into mortar, the other end
Hole is used as grout outlet 6 or air vent；
S3：The two ends of steel pipe are respectively put in extrusion equipment carries out cold extrusion so that the two ends of steel pipe are deformed and reduce
Port 2,3 is formed to required diameter, the internal diameter after steel pipe two ends reduce is bigger than the diameter of reinforcing bar so that between leaving between the two
Gap, to form grouting cavity, eventually becomes bar connecting grout sleeve.
S4：Plug is mixed in the port 2,3 of the steel pipe for processing, and connect into slurry respectively at stock inlet 5 and grout outlet 6
Guiding tube and pulp guiding tube, form full grout sleeve.
As shown in figure 4, from unlike the full grout sleeve shown in Fig. 3, in the diagram, 5 He of stock inlet of full grout sleeve
Grout outlet 6 is located at opposed both sides.
In the present embodiment, the port and the cylinder steel pipe are integrally formed, and the outer wall dimension of the port is less than institute
The outer wall dimension of cylinder steel pipe is stated, and its outer wall shape parallel is in the outer wall shape of the cylinder steel pipe.In different production requirements
Under, the shape of the port can also be：The outer wall dimension of the port is less than the outer wall dimension of the cylinder steel pipe, and outside which
Wall shape is not parallel to the outer wall shape of the cylinder steel pipe so that the grout sleeve of molding little fusiformis knot broad in the middle in two
Structure.
The grout sleeve of the present embodiment, during connection GB HRB500 type diameter 14MM reinforcing bar, stretching resistance is more than 111.5KN, connects
Head failure mode is the reinforcing bar that breaks, and reaches the requirement of I level joint.
The present invention is reduced two ends by fashion of extrusion to form extruding grout sleeve using fished pipe, small-bore contracting
Reinforcing bar is inserted in steel tube extrusion sleeve, the space injection high strength grout in reinforcing bar and steel tube extrusion sleeve tube wall so that
Reinforcing bar is bonded by high strength grout, and high strength grout is extruded grout sleeve constraint, allows the reinforcing bar at two ends transmit drawing
Compressive stress, forms the reliably longitudinally connected force transferring structure of reinforcing bar.
In product design, by choosing steel pipe or the High strength plastic pipe of different materials intensity and wall thickness, through processing
Extruding grout sleeve cross section resistance to tension after molding is more than the resistance to tension of insertion reinforcing bar, therefore in the longitudinally connected filling of reinforcing bar
When slurry muff joint is destroyed, breakdown point is located at parent material of reinforcement rebar, or destroys when joint, and intensity is higher than the tensile strength of reinforcing bar,
By taking the bar connecting grout sleeve of tensile yield strength 500MPa as an example, the joint tension of the longitudinally connected pipe grout sleeve of reinforcing bar is strong
Spend more than Steel Bar Tensile Strength standard value 630MPa, as a example by the bar connecting grout sleeve of tensile yield strength 400MPa,
The joint tensile strength of the longitudinally connected pipe grout sleeve of reinforcing bar is more than Steel Bar Tensile Strength standard value 540MPa.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations should all belong to the protection domain of claims of the present invention.
Above in conjunction with accompanying drawing, exemplary description is carried out to patent of the present invention, it is clear that the realization of patent of the present invention is not received
The restriction of aforesaid way, if the various improvement that the method design of patent of the present invention and technical scheme are carried out are employed, or without
Improve and the design of patent of the present invention and technical scheme are directly applied to other occasions, all within the scope of the present invention.
Claims (10)
1. a kind of bar connecting is used and extrudes grout sleeve, it is characterised in that including cylinder steel pipe, the two ends of the cylinder steel pipe are divided
The port that be extruded together is not provided with, and wherein, the internal diameter of an at least port is more than the diameter for connecting reinforcing bar, two institutes
State 5 times of the length between port no less than connection bar diameter；
The side wall of the steel pipe cylinder is provided with stock inlet and grout outlet, and the stock inlet and the grout outlet are respectively arranged on described
Cylinder steel pipe is provided with the female thread of A/C near the position at two ends, the inner side of the stock inlet and the grout outlet, institute
State stock inlet and the grout outlet connects respectively into slurry guiding tube and pulp guiding tube.
2. bar connecting according to claim 1 is used and extrudes grout sleeve, it is characterised in that the port is provided with glue
Plug, forms full grout sleeve, and the length between two ports is no less than 10 times of connection bar diameter.
3. bar connecting according to claim 1 is used and extrudes grout sleeve, it is characterised in that in two ports,
The inner side of one of them port is provided with the screw thread silk head with the steel bar head coupling for being connected reinforcing bar, forms half grout sleeve,
And the length between two ports is no less than 5 times of connection bar diameter.
4. bar connecting according to claim 1 extruding grout sleeve, it is characterised in that the stock inlet and described go out
Slurry mouth is located at homonymy or offside.
5. bar connecting according to claim 1 is used and extrudes grout sleeve, it is characterised in that the port and the cylinder
Steel pipe is integrally formed, the outer wall dimension of the port less than the outer wall dimension of the cylinder steel pipe, and its outer wall shape parallel in
The outer wall shape of the cylinder steel pipe.
6. bar connecting according to claim 1 is used and extrudes grout sleeve, it is characterised in that the port and the cylinder
Steel pipe is integrally formed, and the outer wall dimension of the port is less than the outer wall dimension of the cylinder steel pipe, and its outer wall shape is not parallel
Outer wall shape in the cylinder steel pipe so that the grout sleeve of molding is in the little fusiformis structure broad in the middle in two.
7. a kind of bar connecting use extrudes the extruding method for making of grout sleeve, it is characterised in that comprise the following steps：
S1：Required according to product design, choose the steel pipe of fixed diameter and wall thickness；
S2：The two ends of the steel pipe are respectively put in extrusion equipment carries out cold extrusion so that the two ends of the steel pipe produce change
Shape and be contracted to required diameter formed port；
S3：Drilled in the position near the steel pipe two ends respectively, a wherein stomidium is the stock inlet for pouring into mortar, the other end
Hole becomes bar connecting grout sleeve as grout outlet or air vent.
8. bar connecting use according to claim 7 extrudes the extruding method for making of grout sleeve, it is characterised in that described
In step S2, the internal diameter of an at least port is bigger than the diameter for connecting reinforcing bar so that leave gap between the two, with shape
Become the cavity that is in the milk.
9. bar connecting use according to claim 7 extrudes the extruding method for making of grout sleeve, it is characterised in that also wrap
Include step S4：Plug is mixed at the two ends of the steel pipe for processing, and be installed at the stock inlet and the grout outlet
Slurry guiding tube and pulp guiding tube, form full grout sleeve.
10. bar connecting use according to claim 7 extrudes the extruding method for making of grout sleeve, it is characterised in that also
Including step S4：The screw thread silk with the steel bar head coupling for being connected reinforcing bar is processed in the inner side of the port of wherein one end
Head, and it is installed into slurry guiding tube and pulp guiding tube at the stock inlet and the grout outlet respectively, form half grout sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610879803.8A CN106437037A (en) | 2016-10-09 | 2016-10-09 | Extruding grouting sleeve used for connection of steel bar and extruding manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610879803.8A CN106437037A (en) | 2016-10-09 | 2016-10-09 | Extruding grouting sleeve used for connection of steel bar and extruding manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106437037A true CN106437037A (en) | 2017-02-22 |
Family
ID=58172493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610879803.8A Withdrawn CN106437037A (en) | 2016-10-09 | 2016-10-09 | Extruding grouting sleeve used for connection of steel bar and extruding manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106437037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138277A (en) * | 2018-08-14 | 2019-01-04 | 建科机械（天津）股份有限公司 | Grout sleeve and sleeve concrete-bar component including the grout sleeve |
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|---|---|---|---|---|
| CN202850360U (en) * | 2012-10-22 | 2013-04-03 | 沈阳建筑大学 | Grouting and anchoring type steel bar connection sleeve and manufacturing mould thereof |
| CN103758292A (en) * | 2014-01-24 | 2014-04-30 | 东南大学 | Shearing reinforcing type full-grouting sleeve |
| CN104453244A (en) * | 2014-12-12 | 2015-03-25 | 广西科技大学 | Reinforcement sleeve extruding connection structure |
| CN204826426U (en) * | 2015-08-02 | 2015-12-02 | 长安大学 | Grout sleeve for steel bar connection |
| CN105133795A (en) * | 2015-05-28 | 2015-12-09 | 山东万斯达建筑科技股份有限公司 | Variable-diameter half grouting sleeve and construction method thereof |
| WO2016148373A1 (en) * | 2015-03-18 | 2016-09-22 | 이용욱 | Reinforcing bar coupler |
| CN205617661U (en) * | 2015-12-31 | 2016-10-05 | 中冶建筑研究总院有限公司 | Short sleeve grout steel bar connection connects and connecting sleeve and pressure -bearing ring that have thereof |
| CN206091081U (en) * | 2016-10-09 | 2017-04-12 | 深圳市现代营造科技有限公司 | Steel bar connection is with extrusion grout sleeve |
-
2016
- 2016-10-09 CN CN201610879803.8A patent/CN106437037A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202850360U (en) * | 2012-10-22 | 2013-04-03 | 沈阳建筑大学 | Grouting and anchoring type steel bar connection sleeve and manufacturing mould thereof |
| CN103758292A (en) * | 2014-01-24 | 2014-04-30 | 东南大学 | Shearing reinforcing type full-grouting sleeve |
| CN104453244A (en) * | 2014-12-12 | 2015-03-25 | 广西科技大学 | Reinforcement sleeve extruding connection structure |
| WO2016148373A1 (en) * | 2015-03-18 | 2016-09-22 | 이용욱 | Reinforcing bar coupler |
| CN105133795A (en) * | 2015-05-28 | 2015-12-09 | 山东万斯达建筑科技股份有限公司 | Variable-diameter half grouting sleeve and construction method thereof |
| CN204826426U (en) * | 2015-08-02 | 2015-12-02 | 长安大学 | Grout sleeve for steel bar connection |
| CN205617661U (en) * | 2015-12-31 | 2016-10-05 | 中冶建筑研究总院有限公司 | Short sleeve grout steel bar connection connects and connecting sleeve and pressure -bearing ring that have thereof |
| CN206091081U (en) * | 2016-10-09 | 2017-04-12 | 深圳市现代营造科技有限公司 | Steel bar connection is with extrusion grout sleeve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138277A (en) * | 2018-08-14 | 2019-01-04 | 建科机械（天津）股份有限公司 | Grout sleeve and sleeve concrete-bar component including the grout sleeve |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170222 |
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| WW01 | Invention patent application withdrawn after publication |