CN213204999U - Anchor withdrawing structure of prestressed tool anchor - Google Patents
Anchor withdrawing structure of prestressed tool anchor Download PDFInfo
- Publication number
- CN213204999U CN213204999U CN202021130152.0U CN202021130152U CN213204999U CN 213204999 U CN213204999 U CN 213204999U CN 202021130152 U CN202021130152 U CN 202021130152U CN 213204999 U CN213204999 U CN 213204999U
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- anchor
- tool
- jack
- backing ring
- bolt
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Abstract
The utility model discloses an anchor withdrawing structure of a prestressed tool anchor, which is connected on a jack for prestressed tensioning and comprises a tool anchor, a tool clamping piece, a backing ring and a bolt; the backing ring is fixedly connected to a piston of the jack, a bulge used for forming a circular groove outside the backing ring extends from the backing ring, and the circular groove is used for accommodating the tool anchor; the bulge is provided with at least one connecting hole; the bolt is connected to the connecting hole and is provided with at least one corresponding to the connecting hole; the tool anchor is provided with an inwards concave clamping groove; the plug pins penetrate through the corresponding connecting holes and can be inserted into the clamping grooves. The utility model discloses a bolt carries on spacingly to the instrument anchor, make the piston of jack retract in-process instrument anchor with the visual structure as an organic whole of jack makes the instrument clamping piece drop from the instrument anchor at the in-process that retracts from this, takes off the instrument anchor from the steel strand wires again, accomplishes and moves back the anchor.
Description
Technical Field
The utility model belongs to the technical field of the construction, concretely relates to anchor structure moves back of prestressing force instrument anchor.
Background
At present, in the prestress construction, the method adopted for withdrawing the tool anchor is to coat lubricating grease on the surface of an anchor hole, wrap a plastic film or lubricating grease on the surface of a clamping piece, and withdraw the anchor by adopting methods of hammering the tool anchor, shaking a steel strand and the like by a constructor after a jack is withdrawn, but the methods still have the condition that the anchor can not be withdrawn at a high probability; after the situation that the anchor can not be withdrawn occurs, the anchor withdrawing of each bundle of steel strands needs more than five minutes if the anchor withdrawing is matched with the front clamping type jack, and because each steel strand is already applied with 170kN prestress, the anchor withdrawing has great safety risk, and the steel strands are easily injured and even seriously threaten life.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a move back anchor structure of prestressing force instrument anchor to overcome above-mentioned technical problem.
The above technical purpose of the present invention can be achieved by the following technical solutions:
an anchor withdrawing structure of a prestressed tool anchor is connected to a jack for prestress tensioning and comprises the tool anchor and a tool clamping piece;
the backing ring is fixedly connected to the piston of the jack, a bulge used for forming a circular groove outside the backing ring is extended outwards in the direction opposite to the direction of the jack, and the circular groove is used for accommodating the tool anchor;
the bulge is provided with at least one connecting hole;
the bolt is connected to the connecting hole and is provided with at least one corresponding to the connecting hole;
a circle of concave clamping grooves is formed in the tool anchor in the circumferential direction of the tool anchor;
the plug pins penetrate through the corresponding connecting holes and can be inserted into the clamping grooves.
Furthermore, a threaded hole is processed in the backing ring, and the backing ring is connected with the piston of the jack through a bolt.
Further, the projection extends a length less than a thickness of the tool anchor.
Has the advantages that:
the utility model discloses a bolt carries on spacingly to the instrument anchor, make the piston of jack retract in-process instrument anchor with the visual structure as an organic whole of jack makes instrument anchor and instrument clamping piece form relative movement retracting the in-process from this, and then the instrument clamping piece drops from the instrument anchor, takes off the instrument anchor from the steel strand wires again, accomplishes and moves back the anchor.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1. a tool anchor; 2. a tool clamping piece; 3. a backing ring; 4. a protrusion; 5. a bolt; 6. a card slot; 7. and (4) bolts.
Detailed Description
In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships only for the purpose of describing the present invention and simplifying the description, but do not indicate or imply that the device or structure referred to must have a particular orientation and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in figure 1, the utility model discloses a prestressing force tool anchor move back anchor structure for connect on the jack that prestressing force tensioning used, including tool anchor and instrument clamping piece, backing ring, bolt and bolt.
The utility model discloses realize its purpose in the market and lie in the improvement and the use of bolt to backing ring and instrument anchor to combined the jack stretch-draw back produced back power that contracts of back piston.
Firstly, a threaded hole is processed on the backing ring, and the backing ring is connected to a piston of the jack through a bolt; secondly, a protrusion which is used for forming a circular groove outside the backing ring and is used for accommodating the tool anchor extends outwards on the backing ring in the opposite direction of the jack, wherein the extending length of the protrusion is preferably smaller than the thickness of the tool anchor; and at least one connecting hole is arranged on the extending protrusion, and the arranged connecting holes are distributed around the circumference of the circular groove.
Then, the bolts are connected to the connecting holes, and the number of the bolts corresponds to the number of the connecting holes; meanwhile, the tool anchor is improved, and an inwards concave clamping groove is formed in the tool anchor around the circumference of the tool anchor; when the bolt is connected to the connecting hole, the bolt can pass through the corresponding connecting hole and can be inserted into the clamping groove.
Because the piston can rotate in the tensioning process of the jack, in order to prevent the tool anchor from being driven by the piston and the backing ring to synchronously rotate at the moment, the clamping groove of the utility model can adopt two modes;
firstly, the clamping groove is a circle of inwards concave circular grooves formed around the circumferential direction of the tool anchor, the bolt is inserted into the circular grooves at the moment, and a certain gap exists between the top end of the bolt and the bottom surfaces of the circular grooves, so that the bolt can move circumferentially along the circular grooves when the piston drives the backing ring to rotate;
secondly, the clamping grooves are circular clamping grooves which are correspondingly arranged with the bolts and distributed on the tool anchor in the circumferential direction of the tool anchor, when the tool anchor is tensioned, the bolts are not inserted into the circular clamping grooves of the tool anchor, and when the tool anchor needs to be withdrawn after tensioning is finished, the bolts are inserted into the circular clamping grooves;
the first mode is preferred in the utility model, and the step of aligning the bolt and the circular clamping groove is needed in the reducible second mode.
When the piston retracts, the backing ring is communicated with the bolt to drive the tool anchor to retract synchronously with the piston, at the moment, tool clamping pieces (three pieces) clamped on a taper hole of the tool anchor move relative to the tool anchor, so that the tool clamping pieces fall off from the taper hole, and finally, after the bolt is taken down from the connecting hole, the tool anchor can be withdrawn from the steel strand, so that the anchor withdrawing process is realized.
Tensioning and anchor withdrawing processes:
firstly, the bolt is not installed, the backing ring is connected to the jack, the tool anchor is connected to the steel strand and moves into the circular groove, the tool clamping piece is installed, tensioning can be started, and the installation time of the bolt is selected according to the type of the clamping groove.
After tensioning is finished, the piston of the jack retracts, the tool anchor, the backing ring and the piston retract synchronously and oppositely under the action of the bolt, the tool clamping piece on the steel strand (fixed with the tool anchor at the moment) moves relative to the tool anchor, so that the tool clamping piece can fall off from the tool anchor and directly fall off, and at the moment, the bolt is disassembled, so that the tool anchor can be taken down from the steel strand, and anchor withdrawal is finished.
In order to make the purpose, technical solution and advantages of the present invention more concise and clear, the present invention is described with the above embodiments, which are only used for describing the present invention, and can not be understood as a limitation to the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (3)
1. An anchor withdrawing structure of a prestressed tool anchor is connected on a jack for prestress tensioning, comprises a tool anchor (1) and a tool clamping piece (2) and is characterized by also comprising,
the backing ring (3) is fixedly connected to the piston of the jack, a protrusion (4) used for forming a circular groove outside the backing ring is extended outwards on the backing ring in the direction opposite to the direction of the jack, and the circular groove is used for accommodating the tool anchor;
the bulge is provided with at least one connecting hole;
the bolt (5) is connected to the connecting hole and is provided with at least one corresponding to the connecting hole;
an inwards concave clamping groove (6) is formed in the tool anchor in the circumferential direction of the tool anchor;
the plug pins penetrate through the corresponding connecting holes and can be inserted into the clamping grooves.
2. The anchor withdrawing structure of the prestressed tool anchor as claimed in claim 1, wherein said backing ring is formed with a threaded hole, and said backing ring is connected with a piston of said jack by means of a bolt (7).
3. The structure of claim 1, wherein the protrusion extends for a length less than a thickness of the tool anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021130152.0U CN213204999U (en) | 2020-06-17 | 2020-06-17 | Anchor withdrawing structure of prestressed tool anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021130152.0U CN213204999U (en) | 2020-06-17 | 2020-06-17 | Anchor withdrawing structure of prestressed tool anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213204999U true CN213204999U (en) | 2021-05-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021130152.0U Active CN213204999U (en) | 2020-06-17 | 2020-06-17 | Anchor withdrawing structure of prestressed tool anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213204999U (en) |
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2020
- 2020-06-17 CN CN202021130152.0U patent/CN213204999U/en active Active
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