CN211114877U - Low-retraction intelligent tensioning limiting plate - Google Patents
Low-retraction intelligent tensioning limiting plate Download PDFInfo
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- CN211114877U CN211114877U CN201822126656.4U CN201822126656U CN211114877U CN 211114877 U CN211114877 U CN 211114877U CN 201822126656 U CN201822126656 U CN 201822126656U CN 211114877 U CN211114877 U CN 211114877U
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Abstract
A low-retraction intelligent tensioning limit plate is characterized in that the middle of a limit oil cylinder is of a through hole structure, and the limit oil cylinder 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 extending position under the state of pressure oil input; the elastic force of the elastic pushing mechanism pushes the limiting piston to a retracted position; the limiting piston is provided with a displacement sensor for detecting the moving position 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; the working state of the limiting piston is controlled by the jacking force of the limiting oil cylinder and the data measured by the displacement sensor.
Description
Technical Field
The utility model relates to a prestressing force stretch-draw technical field, in particular to low intelligent stretch-draw limiting plate that contracts.
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 steel strand is tensioned to the designed tonnage, the steel strand can be held and wrapped by retracting a certain length along with the working clamping piece before the working clamping piece wedges the steel strand, and the loss of tensioning prestress can be caused by the retracting length; and the moving position of the piston can not be determined, and the working state of the limit piston can only be controlled according to the pushing force of the piston.
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 rotation of the limiting piston in tensioning construction, and the low-retraction intelligent tensioning limiting plate of the working state of the limiting piston is controlled by the jacking force of the limiting oil cylinder and the data measured by the displacement sensor together through detecting the relevant data of the displacement sensor.
The utility model discloses a solution is such:
a low-retraction intelligent tensioning limit plate comprises an oil pipe assembly and a limit oil cylinder, wherein the left end surface of the limit oil cylinder is a left working surface connected with a jack, the right end surface of the limit oil cylinder is a right working surface connected with a working anchor plate, the middle part of the limit oil cylinder is of a through hole structure, and a limit piston 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; and the limiting piston is provided with a displacement sensor for detecting the moving position of the limiting piston.
The utility model has the advantages that exert pressure to the work clamping piece before the work clamping piece wedges the work anchor plate, reduce the exposure volume of work clamping piece as far as possible, through the withdrawal value that reduces the work clamping piece when prestressing force tensioning construction, reduce the prestressing force loss of tension steel strand wires, and simultaneously, the feather key can effectively prevent the rotation of spacing piston in tensioning construction, use P L C control center or other control system to detect displacement sensor's relevant data, make the operating condition of the data common control spacing piston that the jacking force of spacing hydro-cylinder and displacement sensor surveyed.
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, a displacement sensor 9, an automatic tool anchor 10 and a jack 11.
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 11, 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; the limiting piston 6 is provided with a displacement sensor 9 for detecting the moving position of the limiting piston 6; spacing piston 6 open and to have a plurality of steel hinge line perforation, respectively place a guide key 3 in every steel hinge line perforation, the length of guide key 3 is greater than the length between the left and right-hand member working face of spacing hydro-cylinder 8, the length that the guide key 3 left side was stretched out can pass automatic tool anchor 10 and press from both sides tight length and stretch out from the left end of automatic tool anchor 10 when needing to reach the use, the length that the guide key 3 right side was stretched out can pass the length of work anchor slab 4 and stretch out from the right-hand member of work anchor slab 4 when needing to reach the use, in this embodiment, the left side of guide key 3 stretches out from the left end of automatic tool anchor 10, guide key 3 has the right side to stretch out from the right of work anchor slab 4.
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.
Under the state shown in figure 3, the tensioning is carried out to the designed tonnage, before the tensioning jack 11 is ready to return, 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 tensioning steel strand 3 is effectively reduced.
After the jack returns, the oil filling assembly 1 releases pressure, the limiting piston 6 returns to the original position under the action of the return spring 7, and the limiting device keeps the normal limiting size.
Claims (1)
1. A low-retraction intelligent tensioning limiting plate 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 (11), 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 retracting position, which is characterized in that: and the limiting piston (6) is provided with a displacement sensor (9) for detecting the moving position of the limiting piston (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126656.4U CN211114877U (en) | 2020-05-27 | 2020-05-27 | Low-retraction intelligent tensioning limiting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126656.4U CN211114877U (en) | 2020-05-27 | 2020-05-27 | Low-retraction intelligent tensioning limiting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211114877U true CN211114877U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822126656.4U Active CN211114877U (en) | 2020-05-27 | 2020-05-27 | Low-retraction intelligent tensioning limiting plate |
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| CN (1) | CN211114877U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319880A (en) * | 2022-03-07 | 2022-04-12 | 四川交达预应力工程检测科技有限公司 | Method and system for determining limiting space of prestress tension limiting device |
-
2020
- 2020-05-27 CN CN201822126656.4U patent/CN211114877U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319880A (en) * | 2022-03-07 | 2022-04-12 | 四川交达预应力工程检测科技有限公司 | Method and system for determining limiting space of prestress tension limiting device |
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