CN212336011U - Screw pre-tightening type fiber anchor rod connecting sleeve - Google Patents
Screw pre-tightening type fiber anchor rod connecting sleeve Download PDFInfo
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- CN212336011U CN212336011U CN202021531296.7U CN202021531296U CN212336011U CN 212336011 U CN212336011 U CN 212336011U CN 202021531296 U CN202021531296 U CN 202021531296U CN 212336011 U CN212336011 U CN 212336011U
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Abstract
A screw pre-tightening type fiber anchor rod connecting sleeve comprises a cylinder body, a screw and a sealing cover; the fiber anchor rod is characterized in that a plurality of screw holes are uniformly distributed in the axis direction on the cylinder body, an anchor rod centering support block is arranged on the inner surface of the cylinder body right opposite to the screw holes, screws are positioned in the screw holes, a gasket is arranged between the nut end of each screw and the cylinder body, and a gasket is arranged between the fiber anchor rod and the screw rod end of each screw; the sealing cover is positioned at the opening of the cylinder body and is provided with a glue solution inlet and outlet. The fiber anchor rod connecting method comprises the following steps: coaxially aligning two fiber anchor rods; brushing epoxy resin glue on the butt joint end rod body, wherein the length of the brushed glue is greater than half the length of the barrel body; brushing glue and winding three layers of fiber cloth; sleeving the barrel at the butt joint of the fiber anchor rods, and placing the gasket between the screw and the fiber anchor rods; screwing a screw, and pressing the fiber anchor rod on the anchor rod centering support block through a gasket to generate radial pressure on the fiber anchor rod; installing a sealing cover, injecting glue into the barrel through a sealing cover glue injection port until glue flows out from a glue solution overflow port, and waiting for epoxy resin glue in the barrel to be completely cured.
Description
Technical Field
The utility model belongs to the technical field of civil engineering, especially, relate to a screw pretension formula fiber anchor rod connecting sleeve.
Background
In recent years, civil engineering construction has been rapidly developed, and reinforcing techniques of reinforcing steel bar anchor rods have been widely used along with civil engineering construction. However, with the improvement of the utilization rate of the construction site and the increase of the depth of foundation engineering, the defects of large self weight, difficult transportation and installation and poor corrosion resistance of the traditional steel bar anchor rod are more and more obvious, so the application of the steel bar anchor rod is limited to a certain extent.
For this reason, fiber anchor rods are increasingly used, and compared with steel bar anchor rods, the fiber anchor rods have the advantages of light weight, convenience in transportation and installation and strong corrosion resistance. However, the application of the fiber anchor rod is still in the starting stage of engineering practice, because the fiber anchor rod is made of thermosetting materials and has poor bending capability, the fiber anchor rod cannot be made into a wire rod shape to be transported to a construction site for cutting, and the fiber anchor rod can only be prefabricated into a rod shape with a fixed length and a fixed length in a factory and then transported to the construction site, and then the fiber anchor rods with the fixed length and the fixed length are connected into a required length. However, the fiber anchor rods cannot be welded and connected like the steel bar anchor rods, and only the binding and overlapping manner or the mechanical punching manner is used for connection, so that not only is the connection efficiency of the fiber anchor rods low, but also the connected fiber anchor rods have the problems of small anchoring force (binding and overlapping manner) or stress concentration (mechanical punching manner), and further the high tensile property of the fiber anchor rods cannot be fully exerted. Therefore, it is necessary to solve the problems of the fiber anchor rod connection in order to promote the development and application of the fiber anchor rod in the civil engineering construction field.
SUMMERY OF THE UTILITY MODEL
Problem to prior art exists, the utility model provides a screw pretension formula fibre stock connecting sleeve, fibre stock can reach 90% of fibre stock ultimate strength at the tensile strength of junction, the high tensile property of full play fibre stock.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a screw pre-tightening type fiber anchor rod connecting sleeve comprises a cylinder body, a screw and a sealing cover; the barrel is of a cylindrical structure, a plurality of screw holes are formed in the barrel, and the screw holes are uniformly distributed along the axis direction of the barrel; an anchor rod centering support block is arranged on the inner surface of the barrel body right opposite to the screw hole, the anchor rod centering support block is of a long strip-shaped structure, the length direction of the anchor rod centering support block is parallel to the axis direction of the barrel body, and the surface of the anchor rod centering support block, which is in abutting contact with the fiber anchor rod, is of a concave arc surface structure; the number of the screws is equal to that of the screw holes, one screw is screwed in each screw hole, a gasket is arranged between the nut end of each screw and the barrel, and a gasket is arranged between the fiber anchor rod and the screw end of each screw; the number of the sealing covers is two, and the two sealing covers are respectively arranged at the openings of the two ends of the cylinder body; and a glue solution inlet and outlet is formed in the sealing cover.
The difference between the diameter of the inner surface of the cylinder body and the diameter of the rod body of the fiber anchor rod is at least 10 mm.
The length of the cylinder body is at least 10 times of the diameter of the fiber anchor rod body.
A fiber anchor rod connecting method adopts the screw pre-tightening type fiber anchor rod connecting sleeve and comprises the following steps:
the method comprises the following steps: placing two fiber anchor rods with fixed length and size on a workbench, coaxially aligning the two fiber anchor rods, wherein the coaxiality error is less than 1mm, and temporarily fixing the two fiber anchor rods;
step two: epoxy resin glue is brushed on the butt joint end rod body of each fiber anchor rod, and the length of the glue brushing on the rod body of each fiber anchor rod is larger than half of the length of the cylinder body;
step three: winding a first layer of fiber cloth on the two fiber anchor rod bodies brushed with the epoxy resin glue;
step four: brushing epoxy resin glue on the surface of the wound first layer of fiber cloth, and then winding a second layer of fiber cloth on the outer side of the first layer of fiber cloth brushed with the epoxy resin glue;
step five: brushing epoxy resin glue on the surface of the wound second layer of fiber cloth, and then winding a third layer of fiber cloth on the outer side of the second layer of fiber cloth brushed with the epoxy resin glue;
step six: firstly, a barrel is sleeved into a butt joint of fiber anchor rods wound with three layers of fiber cloth after passing through any one fiber anchor rod, then prepared gaskets are sent into the barrel and placed between screws and the fiber anchor rods, then all the screws on the barrel are sequentially screwed through a wrench, and the fiber anchor rods are tightly pressed on an anchor rod centering supporting block through the gaskets, so that radial pressure is generated on the fiber anchor rods;
step seven: sleeving the two sealing covers into the cylinder body through the two fiber anchor rods respectively, wherein a glue solution inlet and outlet on one sealing cover is used as a glue injection port, and a glue solution inlet and outlet on the other sealing cover is used as a glue solution overflow port;
step eight: preparing two metal hoops, and temporarily fixing the two sealing covers and the barrel body through the two metal hoops respectively;
step nine: preparing a glue injection hose, connecting the glue injection hose between a glue injection port of the sealing cover and a prepared glue injection pump in a sealing manner, starting the glue injection pump, injecting epoxy resin glue into the cylinder through the glue injection port of the sealing cover until the epoxy resin glue flows out from a glue solution overflow port of the sealing cover on the other side, and indicating that the epoxy resin glue is filled in a cavity between the cylinder and the fiber anchor rod;
step ten: and closing the glue injection pump, removing the glue injection hose, plugging the glue injection port and the glue solution overflow port until epoxy resin glue in the cavity between the cylinder and the fiber anchor rod is completely cured, and finally removing the two metal clamps for temporary fixation to finish the connection of the fiber anchor rod.
The utility model has the advantages that:
the utility model discloses a screw pretension formula fibre stock connecting sleeve, fibre stock can reach 90% of fibre stock ultimate strength at the tensile strength of junction, the high tensile property of full play fibre stock.
Drawings
Fig. 1 is a schematic structural view of a screw-pretightening fiber anchor rod connecting sleeve of the present invention;
fig. 2 is a schematic structural view of the barrel of the present invention;
in the figure, 1-cylinder, 2-screw, 3-sealing cover, 4-screw hole, 5-anchor rod centering supporting block, 6-fiber anchor rod, 7-gasket, 8-gasket, 9-glue inlet and outlet, and 10-epoxy resin glue.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, a screw pre-tightening type fiber anchor rod connecting sleeve comprises a cylinder body 1, a screw 2 and a sealing cover 3; the cylinder body 1 is of a cylindrical structure, a plurality of screw holes 4 are formed in the cylinder body 1, and the screw holes 4 are uniformly distributed along the axis direction of the cylinder body 1; an anchor rod centering support block 5 is arranged on the inner surface of the barrel body 1 opposite to the screw hole 4, the anchor rod centering support block 5 is of a long strip-shaped structure, the length direction of the anchor rod centering support block 5 is parallel to the axis direction of the barrel body 1, and the surface of the anchor rod centering support block 5, which is in abutting contact with the fiber anchor rod 6, is of a concave arc surface structure; the number of the screws 2 is equal to that of the screw holes 4, one screw 2 is screwed in each screw hole 4, a gasket 7 is arranged between the nut end of each screw 2 and the barrel 1, and a gasket 8 is arranged between the fiber anchor rod 6 and the screw end of each screw 2; the number of the sealing covers 3 is two, and the two sealing covers 3 are respectively arranged at the openings at two ends of the cylinder body 1; the sealing cover 3 is provided with a glue solution inlet and outlet 9.
The difference between the diameter of the inner surface of the cylinder body 1 and the diameter of the rod body of the fiber anchor rod 6 is at least 10 mm.
The length of the cylinder body 1 is at least 10 times of the diameter of the rod body of the fiber anchor rod 6.
A fiber anchor rod connecting method adopts the screw pre-tightening type fiber anchor rod connecting sleeve and comprises the following steps:
the method comprises the following steps: placing two fiber anchor rods 6 with fixed length and size on a workbench, coaxially aligning the two fiber anchor rods 6, wherein the coaxiality error is less than 1mm, and then temporarily fixing the two fiber anchor rods 6;
step two: epoxy resin glue is brushed on the butt joint end rod body of each fiber anchor rod 6, and the length of the glue brushing on the rod body of each fiber anchor rod 6 is more than half of the length of the cylinder body 1;
step three: winding a first layer of fiber cloth on the two fiber anchor rods 6 brushed with the epoxy resin glue;
step four: brushing epoxy resin glue on the surface of the wound first layer of fiber cloth, and then winding a second layer of fiber cloth on the outer side of the first layer of fiber cloth brushed with the epoxy resin glue;
step five: brushing epoxy resin glue on the surface of the wound second layer of fiber cloth, and then winding a third layer of fiber cloth on the outer side of the second layer of fiber cloth brushed with the epoxy resin glue;
step six: firstly, a barrel body 1 is sleeved into the butt joint of fiber anchor rods 6 wound with three layers of fiber cloth after passing through any one fiber anchor rod 6, then a prepared gasket 8 is sent into the barrel body 1 and placed between a screw 2 and the fiber anchor rod 6, then all the screws 2 on the barrel body 1 are sequentially screwed through a wrench, the fiber anchor rods 6 are tightly pressed on anchor rod centering support blocks 5 through the gaskets 8, and further radial pressure is generated on the fiber anchor rods 6;
step seven: the two sealing covers 3 are sleeved on the cylinder 1 through two fiber anchor rods 6 respectively, wherein a glue solution inlet and outlet 9 on one sealing cover 3 is used as a glue injection port, and a glue solution inlet and outlet 9 on the other sealing cover 3 is used as a glue solution overflow port;
step eight: preparing two metal hoops, and temporarily fixing the two sealing covers 3 and the barrel 1 through the two metal hoops respectively;
step nine: preparing a glue injection hose, connecting the glue injection hose between a glue injection port of the sealing cover 3 and a prepared glue injection pump in a sealing manner, starting the glue injection pump, injecting epoxy resin glue 10 into the cylinder body 1 through the glue injection port of the sealing cover 3 until the epoxy resin glue 10 flows out from a glue solution overflow port of the sealing cover 3 on the other side, and indicating that the epoxy resin glue 10 is filled in a cavity between the cylinder body 1 and the fiber anchor rod 6;
step ten: and closing the glue injection pump, removing the glue injection hose, plugging the glue injection port and the glue solution overflow port until the epoxy resin glue 10 in the cavity between the cylinder body 1 and the fiber anchor rod 6 is completely cured, and finally removing the two metal clamps for temporary fixation to finish the connection of the fiber anchor rod.
In this embodiment, the diameter of the rod body of the fiber anchor rod 6 is 30mm, the length of the rod body of a single fiber anchor rod 6 is 1m, and the fiber anchor rod 6 is made of glass fiber; the length of the cylinder body 1 is 300mm, the diameter of the inner surface of the cylinder body 1 is 40mm, the wall thickness of the cylinder body 1 is 5mm, the diameter of the outer surface of the cylinder body 1 is 50mm, and the cylinder body 1 is made of 65Mn steel; the length of the anchor rod centering support block 5 in the axis direction is 200 mm; the length of the gasket 8 in the axial direction is 296mm, and the thickness of the gasket 8 is 2 mm; the number of the screw holes 4 and the number of the screws 2 are 4, the aperture of each screw hole 4 is 20mm, and the rod diameter of each screw 2 is phi 20 mm. When the fiber anchor rods are connected, the length of glue brushing on the rod body 6 of each fiber anchor rod is 170mm, the type of epoxy resin glue brushed by the fiber anchor rods is EW25, plain glass fiber cloth is selected as the fiber cloth, the thickness of the fiber cloth is 0.025 +/-0.05 mm, the torque applied by a wrench is controlled to be 1-1.5 kNm when the screw 2 is screwed, the type of epoxy resin glue injected into the cylinder body 1 is E20-HP, the glue injection time is controlled within 10min, and the curing time of the epoxy resin glue in the cylinder body 1 is not less than 20 min.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. The utility model provides a screw pretension formula fibre stock connecting sleeve which characterized in that: comprises a cylinder body, a screw and a sealing cover; the barrel is of a cylindrical structure, a plurality of screw holes are formed in the barrel, and the screw holes are uniformly distributed along the axis direction of the barrel; an anchor rod centering support block is arranged on the inner surface of the barrel body right opposite to the screw hole, the anchor rod centering support block is of a long strip-shaped structure, the length direction of the anchor rod centering support block is parallel to the axis direction of the barrel body, and the surface of the anchor rod centering support block, which is in abutting contact with the fiber anchor rod, is of a concave arc surface structure; the number of the screws is equal to that of the screw holes, one screw is screwed in each screw hole, a gasket is arranged between the nut end of each screw and the barrel, and a gasket is arranged between the fiber anchor rod and the screw end of each screw; the number of the sealing covers is two, and the two sealing covers are respectively arranged at the openings of the two ends of the cylinder body; and a glue solution inlet and outlet is formed in the sealing cover.
2. A screw-preload type fiber anchor rod connecting sleeve according to claim 1, wherein: the difference between the diameter of the inner surface of the cylinder body and the diameter of the rod body of the fiber anchor rod is at least 10 mm.
3. A screw-preload type fiber anchor rod connecting sleeve according to claim 1, wherein: the length of the cylinder body is at least 10 times of the diameter of the fiber anchor rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021531296.7U CN212336011U (en) | 2020-07-29 | 2020-07-29 | Screw pre-tightening type fiber anchor rod connecting sleeve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021531296.7U CN212336011U (en) | 2020-07-29 | 2020-07-29 | Screw pre-tightening type fiber anchor rod connecting sleeve |
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| CN212336011U true CN212336011U (en) | 2021-01-12 |
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| CN202021531296.7U Active CN212336011U (en) | 2020-07-29 | 2020-07-29 | Screw pre-tightening type fiber anchor rod connecting sleeve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778971A (en) * | 2020-07-29 | 2020-10-16 | 中冶沈勘工程技术有限公司 | Screw pre-tightening type fiber anchor rod connecting sleeve and fiber anchor rod connecting method |
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2020
- 2020-07-29 CN CN202021531296.7U patent/CN212336011U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778971A (en) * | 2020-07-29 | 2020-10-16 | 中冶沈勘工程技术有限公司 | Screw pre-tightening type fiber anchor rod connecting sleeve and fiber anchor rod connecting method |
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