CN210828364U - Intelligent tensioning automatic jacking limiting device - Google Patents
Intelligent tensioning automatic jacking limiting device Download PDFInfo
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- CN210828364U CN210828364U CN201822126665.3U CN201822126665U CN210828364U CN 210828364 U CN210828364 U CN 210828364U CN 201822126665 U CN201822126665 U CN 201822126665U CN 210828364 U CN210828364 U CN 210828364U
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- limiting
- oil cylinder
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- limiting piston
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Abstract
An intelligent tensioning automatic jacking limiting device is characterized in that the middle part of a limiting oil cylinder is of a through hole structure, and a limiting piston is sleeved at the through hole; the middle part of the limiting oil cylinder is provided with a groove, the middle part of the limiting piston is provided with a convex ring, after the limiting oil cylinder and the limiting piston are assembled and installed, the groove in the middle part of the limiting oil cylinder is connected with the convex ring of the limiting piston to form an oil cylinder, the oil cylinder is connected with an oil pipe assembly through an oil way, and the limiting piston is pushed to an extended position in a pressure oil input state; the elastic force of the elastic pushing mechanism pushes the limiting piston to a retracted position; and a guide key is arranged in each steel strand through hole of the limiting piston. The prestressed tensioning device has the advantages that pressure is applied to the working clamping piece before the working clamping piece is wedged into the working anchor plate, the exposed amount of the working clamping piece is reduced as much as possible, and the prestress loss of the tensioning steel strand is reduced by reducing the retraction value of the working clamping piece during prestressed tensioning construction; meanwhile, the guide key can effectively prevent the rotation of the limiting piston in tensioning construction.
Description
Technical Field
The utility model relates to a prestressing force stretch-draw technical field, in particular to automatic roof pressure stop device of intelligence stretch-draw.
Background
During prestress tensioning construction, a limiting device needs to be installed, a certain retreating space of the working clamping piece is ensured, and the limiting size of the common limiting device is fixed. When the tension reaches the designed tonnage, before the working clamping piece wedges the steel strand, the steel strand can be held and wrapped by retracting a certain length along with the working clamping piece, and the retracting length can cause the loss of the tension prestress.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device which applies pressure to a working clamping piece before the working clamping piece is wedged into a working anchor plate, reduces the exposure amount of the working clamping piece as much as possible, and reduces the prestress loss of a tension steel strand by reducing the retraction value of the working clamping piece during prestress tension construction; meanwhile, the guide key can effectively prevent the limit piston from rotating in tensioning construction.
The utility model discloses a solution is such:
an intelligent tensioning automatic jacking limiting device comprises an oil pipe assembly and a limiting oil cylinder, wherein the left end face of the limiting oil cylinder is a left working face connected with a jack, the right end face of the limiting oil cylinder is a right working face connected with a working anchor plate, the middle part of the limiting oil cylinder is of a through hole structure, and the limiting oil cylinder is sleeved at the through hole; the limiting oil cylinder is connected with the oil pipe assembly through an oil way, and the limiting piston is pushed to an extending position in a pressure oil input state; an elastic pushing mechanism is arranged between the limiting oil cylinder and the limiting piston, and the elastic force of the elastic pushing mechanism pushes the limiting piston to a retracting position; the limiting piston is provided with a plurality of steel strand through holes, a guide key is arranged in each steel strand through hole, and the length of each guide key is larger than the distance between the left end working face and the right end working face of the limiting oil cylinder.
The more specific technical scheme also comprises the following steps: the left side of the guide key extends to a length which can penetrate through an automatic tool anchor and be clamped when the guide key is used.
Further: the right side of the guide key extends to a length which can penetrate through the working anchor plate when in use.
Further: the middle part of the limiting oil cylinder is provided with a groove, the middle part of the limiting piston is provided with a convex ring, and after the limiting oil cylinder and the limiting piston are assembled and installed, the groove in the middle part of the limiting oil cylinder is connected with the convex ring of the limiting piston to form an oil cylinder.
The utility model has the advantages that the working clamping piece is stressed before being wedged into the working anchor plate, the exposure amount of the working clamping piece is reduced as much as possible, and the prestress loss of the tension steel strand is reduced by reducing the retraction value of the working clamping piece during prestress tension construction; meanwhile, the guide key can effectively prevent the rotation of the limiting piston in tensioning construction.
Drawings
Fig. 1 is a schematic structural view of the present invention in an installation state when used in cooperation with a jack.
Fig. 2 is a schematic structural diagram of the state of the utility model in the tensioning construction process when used with the jack.
Fig. 3 is a schematic structural view of the utility model in the state of oil-feeding pushing the working clamping piece when being used with the jack.
The parts of the drawings are detailed as follows: the oil pipe assembly comprises an oil pipe assembly 1, a guide key 2, a steel hinge line 3, a working anchor plate 4, a working clamping piece 5, a limiting piston 6, a return spring 7, a limiting oil cylinder 8, an automatic tool anchor 9 and a jack 10.
Detailed Description
As shown in fig. 1, 2 and 3, the utility model comprises an oil pipe assembly 1 and a limit oil cylinder 8, wherein the left end face of the limit oil cylinder 8 is a left working face connected with a jack 10, the right end face is a right working face connected with a working anchor plate 4, the middle part of the limit oil cylinder 8 is of a through hole structure, and a limit piston 6 is sleeved at the through hole; the middle part of the limiting oil cylinder 8 is provided with a groove, the middle part of the limiting piston 6 is provided with a convex ring, after the limiting oil cylinder 8 and the limiting piston 6 are assembled and installed, the groove in the middle part of the limiting oil cylinder 8 is connected with the convex ring of the limiting piston 6 to form an oil cylinder, the oil cylinder is connected with the oil pipe assembly 1 through an oil way, and the limiting piston 6 is pushed to an extended position under the state of pressure oil input; an elastic pushing mechanism is arranged between the limiting oil cylinder 8 and the limiting piston 6, and the elastic force of the elastic pushing mechanism pushes the limiting piston 6 to a retraction position; spacing piston 6 open and to have a plurality of steel hinge line to perforate, respectively place a guide key 2 in every steel hinge line perforation, the length of guide key 2 is greater than the distance of 8 left and right-hand members working faces of spacing hydro-cylinder, the length that the guide key 2 left side was stretched out can pass automatic tool anchor 9 and press from both sides tight length and stretch out from the left end of automatic tool anchor 9 when needing to reach the use, the length that the guide key 2 right side was stretched out can pass the length of work anchor plate 4 and stretch out from the right-hand member of work anchor plate 4 when needing to reach the use.
In the installation state shown in fig. 1, in the installation state, the oil pipe assembly 1 is not supplied with oil, the limiting piston 6 is far away from the end face of the working anchor plate 4 under the action of the return spring 7, and the limiting size keeps a normal value.
In the state shown in fig. 2, in the prestress tensioning construction process, the oil pipe assembly 1 is not supplied with oil, the limiting piston 6 is far away from the end face of the working anchor plate 4 under the action of the return spring 7, and the limiting size is kept at a normal value continuously.
In the state shown in fig. 3, the jack 10 is tensioned to the designed tonnage, the pressure maintaining is finished, the continuous pressure supplementing to the jack 10 is stopped, the oil pipe assembly 1 supplies oil and pressurizes, the limiting piston 6 supports the working clamping piece 5 to the nearest position of the working anchor plate 4 under the action of oil pressure, the retraction amount of the working clamping piece 5 is reduced as much as possible, and therefore the prestress loss of the tensioned steel strand is effectively reduced.
After the oil filling assembly 1 is decompressed, the limiting piston 6 returns to the original position under the action of the return spring 7, the limiting device keeps the normal limiting size, the tensioning jack 10 starts to decompress, and then the return stroke is carried out.
Claims (4)
1. The utility model provides an automatic roof pressure stop device of intelligence stretch-draw which characterized in that: the oil pipe assembly comprises an oil pipe assembly (1) and a limiting oil cylinder (8), wherein the left end face of the limiting oil cylinder (8) is a left working face connected with a jack (10), the right end face of the limiting oil cylinder is a right working face connected with a working anchor plate (4), the middle part of the limiting oil cylinder (8) is of a through hole structure, and a limiting piston (6) is sleeved at the through hole; the limiting oil cylinder (8) is connected with the oil pipe assembly (1) through an oil way, and the limiting piston (6) is pushed to an extending position in a pressure oil input state; an elastic pushing mechanism is arranged between the limiting oil cylinder (8) and the limiting piston (6), and the elastic force of the elastic pushing mechanism pushes the limiting piston (6) to a retracted position; the limiting piston (6) is provided with a plurality of steel strand through holes, a guide key (2) is arranged in each steel strand through hole, and the length of each guide key (2) is greater than the distance between the left end working face and the right end working face of the limiting oil cylinder (8).
2. An intelligent tensioning automatic jacking and limiting device according to claim 1, which is characterized in that: the left side of the guide key (2) extends to a length which can penetrate through the automatic tool anchor (9) and be clamped when in use.
3. An intelligent tensioning automatic jacking and limiting device according to claim 1, which is characterized in that: the right side of the guide key (2) extends to a length which can penetrate through the working anchor plate (4) when in use.
4. An intelligent tensioning automatic jacking and limiting device according to claim 1, which is characterized in that: the middle of the limiting oil cylinder (8) is provided with a groove, the middle of the limiting piston (6) is provided with a convex ring, and after the limiting oil cylinder (8) and the limiting piston (6) are assembled and installed, the groove in the middle of the limiting oil cylinder (8) is connected with the convex ring of the limiting piston (6) to form an oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126665.3U CN210828364U (en) | 2018-12-18 | 2018-12-18 | Intelligent tensioning automatic jacking limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126665.3U CN210828364U (en) | 2018-12-18 | 2018-12-18 | Intelligent tensioning automatic jacking limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210828364U true CN210828364U (en) | 2020-06-23 |
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ID=71251141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822126665.3U Active CN210828364U (en) | 2018-12-18 | 2018-12-18 | Intelligent tensioning automatic jacking limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210828364U (en) |
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2018
- 2018-12-18 CN CN201822126665.3U patent/CN210828364U/en active Active
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