CN220893969U - Clamping piece void volume detection device in reverse pulling method - Google Patents
Clamping piece void volume detection device in reverse pulling method Download PDFInfo
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- CN220893969U CN220893969U CN202322637537.6U CN202322637537U CN220893969U CN 220893969 U CN220893969 U CN 220893969U CN 202322637537 U CN202322637537 U CN 202322637537U CN 220893969 U CN220893969 U CN 220893969U
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- 239000011800 void material Substances 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of bridge prestress steel strand detection, and provides a clamping piece void volume detection device in a reverse pulling method, which comprises the following steps: the reverse pulling assembly comprises a reverse pulling jack and a reverse pulling working clamping piece, the reverse pulling working clamping piece is arranged in the reverse pulling jack, the reverse pulling jack is sleeved at one end with larger diameter of an anchor clamping piece to be reversely pulled, and the end face, close to one end of the anchor clamping piece, of the reverse pulling jack is contacted with an anchor; the detection assembly comprises a built-in pointer fixing part and a pointer, wherein the built-in pointer fixing part is arranged inside the counter-pulling jack, one end of the pointer is arranged on the built-in pointer fixing part, and the other end of the pointer is contacted with an end face, far away from an anchor, of the anchor clamping piece. The utility model can automatically detect and control the size of the clamping piece void volume in the reverse-pulling method detection process, thereby avoiding secondary clamping damage of the steel strand and prestress loss under the anchor caused by the change of the clamping position and improving the safety.
Description
Technical Field
The utility model relates to the technical field of bridge prestress steel strand detection, in particular to a clamping piece void volume detection device in a reverse pulling method.
Background
The reverse pulling method is a direct test method for detecting the prestress under the steel strand anchor in the construction period, and is a method for synchronously measuring the displacement of the steel strand and the prestress under the anchor by applying reverse pulling force on the working length of the exposed section of the steel strand before grouting the post-tensioned prestressed concrete beam pore canal. In the detection, if the bite of the steel strand and the clamping piece is x mm, the inclination of the anchor from outside to inside is 1:y, and if the clamping piece is separated from the steel strand, the pull-out length of the steel strand is at least x.y mm, so when the displacement of the clamping piece in the reverse pulling method exceeds x.y mm, the clamping mark positions of the clamping piece and the steel strand can be separated, further effective prestress loss under the anchor is caused, the position of the clamping piece on the steel strand is changed, the steel strand is secondarily clamped, and the safety is reduced.
Therefore, in order to solve the above problems, a clip void amount detecting device in a reverse pulling method is provided.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model develops the clamping piece void volume detection device in the reverse drawing method, and the utility model can automatically detect and control the clamping piece void volume in the detection process of the reverse drawing method, thereby avoiding secondary clamping damage of the steel strand and prestress loss under anchors caused by the change of the clamping position and improving the safety.
The utility model aims to achieve the aim, and the aim is achieved by the following technical scheme:
A clip void volume detection device in a reverse draw process, comprising:
the reverse pulling assembly comprises a reverse pulling jack and a reverse pulling working clamping piece, the reverse pulling working clamping piece is arranged in the reverse pulling jack, the reverse pulling jack is sleeved at one end with larger diameter of an anchor clamping piece to be reversely pulled, and the end face of the reverse pulling jack, which is close to one end of the anchor clamping piece, is contacted with an anchor;
The detection assembly comprises a built-in pointer fixing part and a pointer, wherein the built-in pointer fixing part is arranged inside the counter-pulling jack, one end of the pointer is arranged on the built-in pointer fixing part, and the other end of the pointer is contacted with an end face, far away from an anchor, of the anchor clamping piece.
Preferably, the counter-pulling working clamping piece and the central axis of the anchorage clamping piece are arranged in the same line, and all clamp the prestress steel strand, and the counter-pulling working clamping piece clamps the prestress steel strand and drives the prestress steel strand and the anchorage clamping piece to move in a direction away from the anchorage under the action of the counter-pulling jack, so that the aim of testing the prestress of the steel strand is fulfilled.
Preferably, the pointer is a flexible pointer which can be freely stretched, so that the void volume of the anchor clamping piece is measured, the movement of the anchor clamping piece is not influenced, and the practicability of the device is improved.
Preferably, the length direction of the pointer is parallel to the prestressed steel strands, so that the void volume of the anchor clamping piece is accurately measured, errors caused by angle reasons are avoided, and the accuracy of the device and the safety of detection are improved.
Preferably, the counter-pulling jack adopts a hydraulic circuit to realize the stretching function, the hydraulic system is easy to control, and the use safety of the device is improved.
Preferably, the detection assembly further comprises a tensioning controller, the tensioning controller is electrically connected with the pointer and an electric control valve of a hydraulic circuit of the counter-pulling jack, the pointer transmits the void volume of the anchor clamping piece to the tensioning controller for processing, the counter-pulling jack is controlled by the tensioning controller to stop tensioning when the maximum void volume of the anchor clamping piece is reached, and oil returns to enable the anchor clamping piece to recover to the original position, so that safety and control accuracy are improved.
Further preferably, the pointers are arranged in the counter-pulling jack and are positioned in the same vertical plane, and are electrically connected with the tensioning controller, so that the void volume of the anchor clamping piece can be detected simultaneously, the tensioning controller processes data, errors are reduced, and the accuracy of the device is improved.
The effects provided in the summary of the utility model are only effects of the embodiments, not all effects of the utility model, and the above technical solution has the following advantages:
1. according to the utility model, by arranging the freely telescopic pointer of the detection assembly, the real-time detection of the void volume of the anchor clamping piece in the process of testing the prestress under the steel strand by using the reverse pulling method is realized, the change of the clamping position caused by the void of the anchor clamping piece is avoided, the secondary clamping injury of the steel strand and the loss of the prestress under the anchor are further caused, and the accuracy of detecting the prestress under the steel strand by the reverse pulling method is improved;
2. According to the utility model, the tension controller of the detection assembly is arranged, and the tension controller is electrically connected with the pointer and the counter-pulling jack, so that the void volume of the anchor clamping piece is detected in real time, and the counter-pulling jack is controlled to stop counter-pulling and return oil to recover the position of the anchor clamping piece when the anchor clamping piece is completely separated from the die, thereby improving the safety of the counter-pulling method in detecting the prestress under the steel strand.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.
FIG. 1 is a schematic diagram of an overall structure applied in an embodiment of the present utility model;
FIG. 2 is a schematic cross-sectional view of an embodiment of the present utility model;
FIG. 3 is a schematic view of a partially cut-away structure used in an embodiment of the present utility model.
In the figure, 1, a counter-pulling jack; 2. a pointer fixing part is arranged in the pointer fixing part; 3. a pointer; 4. pulling the working clamping piece reversely; 5. a tensioning controller; 6. an anchor clip; 7. an anchor; 8. prestress wire.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-3, the present utility model provides a technical solution:
A clip void volume detection device in a reverse draw process, comprising:
The counter-pulling assembly comprises a counter-pulling jack 1 and a counter-pulling working clamping piece 4, the counter-pulling working clamping piece 4 is arranged in the counter-pulling jack 1, the counter-pulling jack 1 is sleeved at one end with the larger diameter of an anchor clamping piece 6 to be counter-pulled, and the end face, close to one end of the anchor clamping piece 6, of the counter-pulling jack 1 is contacted with an anchor 7;
The detection assembly comprises a built-in pointer fixing part 2 and a pointer 3, wherein the built-in pointer fixing part 2 is arranged inside the back-pulling jack 1, one end of the pointer 3 is arranged on the built-in pointer fixing part 2, and the other end of the pointer 3 is contacted with an end face, far away from an anchor 7, of the anchor clamping piece 6.
In this embodiment, the central axes of the counter-pulling working clamping piece 4 and the anchor clamping piece 6 are arranged in the same line, and both clamp the prestress wire 8, the counter-pulling working clamping piece 4 clamps the prestress wire 8, and the prestress wire 8 and the anchor clamping piece 6 are driven to move in a direction away from the anchor 7 under the action of the counter-pulling jack 1, so that the aim of testing the prestress of the steel strand is fulfilled.
In this embodiment, the pointer 3 is configured as a flexible pointer that can be freely stretched, so as to measure the void volume of the anchor clamping piece 6, and the movement of the anchor clamping piece 6 is not affected, thereby improving the practicality of the device.
In this embodiment, the length direction of the pointer 3 is parallel to the prestressed steel strand 8, so as to accurately measure the void volume of the anchor clamping piece 6, avoid errors caused by angle reasons, and improve the accuracy of the device and the safety of detection.
In this embodiment, the prestress wire 8 and the anchor clamping piece 6 move in a direction away from the anchor 7, and at the same time, the anchor clamping piece 6 compresses the pointer 3, so that the pointer 3 contracts, and the detection of the void amount of the anchor clamping piece 6 is realized, thereby improving the practicability of the device.
In the embodiment, the counter-pulling jack 1 adopts a hydraulic circuit to realize the stretching function, the hydraulic system is easy to control, and the use safety of the device is improved.
In this embodiment, the detection assembly further includes a tensioning controller 5, the tensioning controller 5 is electrically connected with the pointer 3 and the electric control valve of the hydraulic circuit of the counter-pulling jack 1, the pointer 3 transmits the void volume of the anchor clamping piece 6 to the tensioning controller 5 for processing, when the maximum void volume of the anchor clamping piece 6 is reached, the counter-pulling jack 1 is controlled by the tensioning controller 5 to stop tensioning, and oil returns to enable the anchor clamping piece 6 to recover the recovery position, so that safety and control accuracy are improved.
In another embodiment, the pointers 3 are arranged in the counter-pulling jack 1 and are located in the same vertical plane, and are electrically connected with the tensioning controller 5, so that the void amount of the anchor clamping piece 6 can be detected at the same time, the tensioning controller 5 processes data, errors are reduced, and the accuracy of the device is improved.
In another embodiment, the pointer 3 may be replaced by a spring and a displacement sensor, one end of the spring is disposed on the built-in pointer fixing member 2, the other end of the spring is disposed in contact with the anchor clamping piece 6, and the length direction of the spring is parallel to the prestressed steel strand 8, the displacement sensor is disposed on the spring and can measure the compression amount of the spring, and the displacement sensor is electrically connected with the tension controller 5 and can achieve the same effect as the pointer 3.
Working principle: firstly, arranging a counter-pulling jack 1 and a counter-pulling working clamping piece 4 of the device on a prestress steel strand 8 at one side far away from an anchorage device 7, wherein the axis of the counter-pulling working clamping piece 4 and the axis of the anchorage device clamping piece 6 are positioned in the same straight line, the counter-pulling working clamping piece 4 clamps the prestress steel strand 8, and one end surface of the counter-pulling jack 1 close to the anchorage device clamping piece 6 contacts with the anchorage device 7; then, the telescopic pointer 3 is adjusted, so that one end of the telescopic pointer 3 far away from the built-in pointer fixing piece 2 is contacted with the end face of the anchor clamping piece 6 far away from the anchor 7, and the initial value of the displacement of the pointer 3 at the moment is adjusted to be 0; then starting a counter-pulling jack 1, driving a counter-pulling working clamping piece 4 to move by the counter-pulling jack 1, driving a prestress steel strand 8 and an anchorage clamping piece 6 to move in a direction away from an anchorage 7 by the counter-pulling working clamping piece 4, separating the anchorage clamping piece 6 from the anchorage 7, simultaneously compacting a pointer 3, shrinking the pointer 3, transmitting the shrinkage to a tensioning controller 5, and automatically recording the deformation of the pointer 3 by the tensioning controller 5; when the release amount of the anchor clamping piece 6 reaches the maximum value, the tensioning controller 5 controls the counter-pulling jack 1 to stop pulling, oil returns to enable the anchor clamping piece 6 to return to the initial position, the counter-pulling jack 1 is retracted, and detection is finished.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more such feature, and in the description of the present utility model, a "plurality" means two or more, unless otherwise specifically limited.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. The utility model provides a clamping piece void volume detection device in reverse draw method which characterized in that includes:
The reverse pulling assembly comprises a reverse pulling jack (1) and a reverse pulling working clamping piece (4), the reverse pulling working clamping piece (4) is arranged in the reverse pulling jack (1), the reverse pulling jack (1) is sleeved at one end with a larger diameter of an anchor clamping piece (6) to be reversely pulled, and the end face, close to one end of the anchor clamping piece (6), of the reverse pulling jack (1) is contacted with an anchor (7);
The detection assembly comprises a built-in pointer fixing part (2) and a pointer (3), wherein the built-in pointer fixing part (2) is arranged inside the counter-pulling jack (1), one end of the pointer (3) is arranged on the built-in pointer fixing part (2), and the other end of the pointer (3) is contacted with an end face, far away from an anchor (7), of the anchor clamping piece (6).
2. The device for detecting the void content of a clip in a reverse drawing method according to claim 1, wherein: the counter-pulling working clamping piece (4) and the central axis of the anchorage clamping piece (6) are arranged in the same line, and both clamp the prestress steel strand (8).
3. The device for detecting the void content of a clip in a reverse drawing method according to claim 1, wherein: the pointer (3) is a flexible pointer which can freely stretch and retract.
4. A clip void volume detection apparatus in a reverse draw process according to claim 3, wherein: the length direction of the pointer (3) is parallel to the prestressed steel strand (8).
5. The device for detecting the void content of a clip in a reverse drawing method according to claim 4, wherein: the detection assembly further comprises a tensioning controller (5), and the tensioning controller (5) is electrically connected with the pointer (3) and the counter-pulling jack (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322637537.6U CN220893969U (en) | 2023-09-27 | 2023-09-27 | Clamping piece void volume detection device in reverse pulling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322637537.6U CN220893969U (en) | 2023-09-27 | 2023-09-27 | Clamping piece void volume detection device in reverse pulling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220893969U true CN220893969U (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322637537.6U Active CN220893969U (en) | 2023-09-27 | 2023-09-27 | Clamping piece void volume detection device in reverse pulling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220893969U (en) |
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2023
- 2023-09-27 CN CN202322637537.6U patent/CN220893969U/en active Active
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