CN220224986U - Steel strand replacement continuous tensioning device suitable for compact operation space - Google Patents
Steel strand replacement continuous tensioning device suitable for compact operation space Download PDFInfo
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- CN220224986U CN220224986U CN202321517494.1U CN202321517494U CN220224986U CN 220224986 U CN220224986 U CN 220224986U CN 202321517494 U CN202321517494 U CN 202321517494U CN 220224986 U CN220224986 U CN 220224986U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 238000004873 anchoring Methods 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 26
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to a steel strand replacement continuous tensioning device suitable for a compact working space, and belongs to the technical field of bridge engineering. The device comprises a first adjusting screw rod group and a second adjusting screw rod group, wherein the first adjusting screw rod group and the second adjusting screw rod group penetrate through a supporting plate, the first adjusting screw rod group corresponds to a first jacking jack group, the second adjusting screw rod group corresponds to a second jacking jack group, the first jacking jack group is arranged between the first adjusting screw rod group and an anchoring block, and the second jacking jack group is arranged between the second adjusting screw rod group and the anchoring block; the support plate is provided with a threading hole, the steel strand penetrates through the threading hole, the steel strand is provided with a single-hole clamping piece anchor, and the single-hole clamping piece anchor abuts against the end face of the support plate. The replacement of the steel strand wires is put and stretch-draw and need not to adopt the through jack, has practiced thrift operating space by a wide margin, satisfies the compact demand of engineering structure, has adapted to the development of engineering construction technique.
Description
Technical Field
The utility model relates to a steel strand replacement continuous tensioning device suitable for a compact working space, and belongs to the technical field of bridge engineering.
Background
The inhaul cable manufactured by adopting the materials such as the prestressed steel strand, the clamping piece type anchorage device and the like is widely applied to bridge and building structural engineering. In the construction and installation process, the conventional method for stretching the steel strand adopts a penetrating jack for stretching, and a steel strand inhaul cable needs to be reserved with a longer stretching working length. During tensioning, a tensioning support is firstly installed, and then a steel strand with a working length section penetrates into a jack center hole to be tensioned, and the jack is installed back and forth during operation, so that a long longitudinal operation space is required; when the steel strand inhaul cable reaches the replacement limit, the steel strand needs to be discharged by adopting a jack, and the old steel strand is possibly connected and lengthened during the tension releasing construction, the jack stroke is limited, and the temporary conversion anchoring support is also required to be arranged, so that a longer longitudinal operation space is required.
Because of the limitation of the prior construction technology, the tensioning and replacement of the steel strand inhaul cable require larger operation space, the design of compact space structures of bridge and building structure designers is limited, particularly the reinforcing design of some old bridges is limited to the congenital condition, and the design of the anchoring structure of the steel strand inhaul cable is difficult; in the replacement construction of the steel strand inhaul cable of the old bridge, occasion working conditions with narrow working space exist, so that the replacement, tensioning and other operation operations of the steel strand inhaul cable are very difficult.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the steel strand replacement continuous tensioning device suitable for the compact working space, the device is suitable for construction operation of the compact working space, continuous tensioning operation can be realized, and the working efficiency is improved.
The utility model solves the problems by adopting the following technical scheme: the steel strand replacement continuous tensioning device suitable for the compact working space comprises a first adjusting screw rod group and a second adjusting screw rod group, wherein a supporting plate is arranged in the first adjusting screw rod group and the second adjusting screw rod group in a penetrating mode, the first adjusting screw rod group corresponds to a first jacking jack group, the second adjusting screw rod group corresponds to a second jacking jack group, the first jacking jack group is arranged between the first adjusting screw rod group and an anchoring block, and the second jacking jack group is arranged between the second adjusting screw rod group and the anchoring block; the support plate is provided with a threading hole, the steel strand penetrates through the threading hole, the steel strand is provided with a single-hole clamping piece anchor, and the single-hole clamping piece anchor abuts against the end face of the support plate.
The support plate is provided with N threaded holes which are uniformly distributed in the circumferential direction, the threaded holes correspond to the first adjusting screw rod group and the second adjusting screw rod group, and the first adjusting screw rod group and the second adjusting screw rod group are respectively in threaded connection with the support plate.
And N is any integer between 4 and 10.
The first adjusting screw group comprises a plurality of first adjusting screws, the second adjusting screw group comprises a plurality of second adjusting screws, and the first adjusting screws and the second adjusting screws are staggered.
The bottom of one of the first adjusting screw rods in the first adjusting screw rod group, the bottom of one of the second adjusting screw rods in the second adjusting screw rod group and the bottom of the single-hole clamping piece anchor are respectively provided with a pressure sensor.
The first lifting jack group comprises a plurality of first lifting jacks, the second lifting jack group comprises a plurality of second lifting jacks, the first lifting jacks are respectively communicated with the first total oil pipe through first oil distribution pipes, and the second lifting jacks are respectively communicated with the second total oil pipe through second oil distribution pipes; the first total oil pipe and the second total oil pipe are respectively connected to the pump station control system.
The first total oil pipe is provided with a first distribution valve, and the second total oil pipe is provided with a second distribution valve.
The anchor plate outside sets up the bed plate, set up the location connecting hole on the bed plate respectively, first jack and second jack locate the location connecting hole respectively in.
Compared with the prior art, the utility model has the advantages that: a steel strand replacement continuous tensioning device suitable for compact working space,
1. the replacement, the stretching and the tensioning of the steel stranded wires do not need to adopt a penetrating jack, so that the operation space is greatly saved;
2. the requirement of compact space design of the engineering structure can be met, and the development of engineering construction technology is adapted;
3. the continuous tensioning function can be realized through the grouping control of the jack, the tensioning control with the sensing function is further implemented, and the workload of manual operation is reduced.
Drawings
FIG. 1 is a schematic diagram of a steel strand replacement continuous tensioning device adapted to a compact working space according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of A-A of FIG. 1;
FIG. 3 is a cross-sectional view of B-B in FIG. 2;
FIG. 4 is a jack travel conversion schematic;
FIG. 5 is a schematic diagram of a jack and pump station control system connection;
FIG. 6 is a schematic diagram of a stretch control with sensing function;
FIG. 7 is a schematic diagram of a strand replacement continuous tensioning apparatus with a base plate adapted for compact working space;
in the figure, a single-hole clamping piece anchor, a 2 supporting plates, a 3 first adjusting screw, a 4 first jacking jack, a 5 second adjusting screw, a 6 second jacking jack, a 7 pressure sensor, 8 steel strands, a 9 working clamping piece, a 10 anchor plate, an 11 anchoring block, a 12 base plate, a 21 first oil distributing pipe, a 22 first distributing valve, a 23 first total oil pipe, a 31 second oil distributing pipe, a 32 second distributing valve, a 33 second total oil pipe and a 40 pump station control system are arranged.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, 2 and 3, a steel strand replacement continuous tensioning device adapting to a compact working space in this embodiment includes a first adjusting screw group and a second adjusting screw group, the first adjusting screw group and the second adjusting screw group penetrate through a supporting plate 2, the first adjusting screw group and the second adjusting screw group are in threaded connection with the supporting plate 2, and the first adjusting screw group and the second adjusting screw group are rotated, so that the first adjusting screw group and the second adjusting screw group move. The periphery of the anchor plate 10 is provided with a first jacking jack group and a second jacking jack group, the first adjusting screw group corresponds to the first jacking jack group, the second adjusting screw group corresponds to the second jacking jack group, and the first jacking jack group and the second jacking jack group are arranged on the side face of the anchoring block 11. The supporting plate 2 is provided with a threading hole, the steel strand 8 is threaded through the threading hole, the steel strand 8 is provided with a single-hole clamping piece anchor 1, and the single-hole clamping piece anchor 1 abuts against the end face of the supporting plate 2.
The support plate 2 is provided with 6 screw holes uniformly distributed in the circumferential direction, the first adjusting screw group comprises 3 first adjusting screws 3, the second adjusting screw group comprises 3 second adjusting screws 5, the first adjusting screws 3 and the second adjusting screws 5 are staggered, and the screw holes correspond to the first adjusting screws 3 and the second adjusting screws 5.
As shown in fig. 4 and 5, the first jack-up jack group includes 3 first jack-up jacks 4, the second jack-up jack group includes 3 second jack-up jacks 6, the first jack-up jacks 4 correspond to the first adjusting screw 3, and the second jack-up jacks 6 correspond to the second adjusting screw 5. The first jack 4 is respectively communicated with the first total oil pipe 23 through the first oil distribution pipe 21, the second jack 6 is respectively communicated with the second total oil pipe 33 through the second oil distribution pipe 31, the first total oil pipe 23 is provided with a first distribution valve 22, and the second total oil pipe 33 is provided with a second distribution valve 32. The first main oil pipe 23 and the second main oil pipe 33 are respectively connected to a pump station control system 40, and the pump station control system 40 has the functions of controlling the components of each lifting jack and controlling the linkage of all lifting jacks.
As shown in fig. 6, pressure sensors are respectively arranged at the bottom of one of the first adjusting screws, the bottom of one of the second adjusting screws and the bottom of the single-hole clamping piece anchor, and the data lines of the pressure sensors are connected into the pump station control system, so that automatic tensioning control with a sensing function is realized, and the workload of manual operation is reduced.
As shown in fig. 7, in order to facilitate the installation and positioning of the 6 jack-up jacks, a base plate 12 is further provided, and the base plate 12 is installed outside the anchor plate 10. The base plate 12 is provided with 6 positioning connection holes, and the first lifting jack 4 and the second lifting jack 6 are respectively arranged in the positioning connection holes.
An implementation method of a steel strand replacement continuous tensioning device suitable for a compact working space comprises the following steps:
step one: assembling a tensioning device;
a. mounting a supporting plate, enabling the steel strand to be replaced to pass through the supporting plate, mounting a single-hole clamping piece anchor, enabling the end face of the single-hole clamping piece anchor to be abutted against the end face of the supporting plate, and tightly fastening the single-hole clamping piece anchor;
b. the first adjusting screw rod and the second adjusting screw rod are respectively penetrated through threaded holes, so that the first adjusting screw rod and the second adjusting screw rod are in threaded connection with the supporting plate;
c. the first jack and the second jack are distributed at intervals and are arranged on the outer side of the anchor plate, and the positions of the jack are adjusted, so that the first jack and the first adjusting screw are in one-to-one correspondence and are located on the same axis, and the second jack and the second adjusting screw are in one-to-one correspondence and are located on the same axis.
Step two: the hydraulic oil way is connected;
the first jacking jack group is connected with the first total oil pipe through each first oil distribution pipe, the second jacking jack group is connected with the second total oil pipe through each second oil distribution pipe, and the second jacking jack group is connected with the pump station control system after converging.
Step three: tensioning device adjustment preparation
a. Starting a pump station control system, and extending out the pistons of the first jack-up group and the second jack-up group by a stroke L1;
b. rotating the first adjusting screw rod group to enable the end face of each first adjusting screw rod to be abutted against the piston of each first jack;
c. and rotating the second adjusting screw rod groups to enable the distance between the end face of each second adjusting screw rod and the piston of each second jack group to be L2, wherein L2 is smaller than L1.
Step four: steel strand replacement operation
a. Starting transfer control of a pump station control system, enabling the piston of each first lifting jack to be continuously driven out, pushing the supporting plate, driving the single-hole clamping piece anchor to clamp the steel stranded wire to be stretched outwards by the supporting plate until the working clamping piece in the anchor plate is pulled out, and taking out the working clamping piece;
b. and starting transfer control of a pump station control system to enable each first lifting jack to drain oil slowly, enabling the supporting plate to approach the first lifting jack, and gradually reducing the distance L2 between the second adjusting screw group and the piston of the second lifting jack group until the end part of the second adjusting screw is contacted with the end surface of the piston of the second lifting jack. When the pressure value of the pressure sensor arranged in the first adjusting screw rod is 0, the tension of the steel stranded wire is converted and loaded on the second jacking jack group through the single-hole clamping piece anchor and the supporting plate.
c. When the pressure value of a pressure sensor arranged in the first adjusting screw is 0, the first adjusting screw group is rotated to enable the first adjusting screw to be far away from the first lifting jack, meanwhile, the transfer control of the pump station control system is started, the piston of the first lifting jack is driven out by a stroke L1 again, the distance between the end face of the first adjusting screw and the piston of the first lifting jack is L2, and L2 is smaller than L1;
d. and starting transfer control of a pump station control system to enable the second jacking jack group to drain oil slowly, enabling the supporting plate to approach the second jacking jack, and gradually reducing the distance L2 between the first adjusting screw and the first jack piston until the end part of the first adjusting screw contacts with the end surface of the first jacking jack piston. When the pressure value of the pressure sensor arranged in the first adjusting screw rod is 0, the tension of the steel stranded wire is converted and loaded on the first jack group through the single-hole clamping piece anchor and the supporting plate.
e. Repeating the operations b, c and d in the fourth step until the tension of the steel strand is completely released;
f. so far, the tension of one steel strand of the steel strand inhaul cable is completed, and then a new steel strand is replaced according to a conventional construction method;
g. the tensioning operation of the new steel strand can be completed according to the reverse process of the operation.
The replacement of the steel strand wires is put and stretch-draw and need not to adopt the punching jack, has practiced thrift operating space by a wide margin, satisfies the compact demand of engineering structure, has adapted to the development of engineering construction technique. The continuous tensioning function can be realized through the group control of the first jacking jack group and the second jacking jack group; the working efficiency is improved.
In addition to the above embodiments, the present utility model also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present utility model.
Claims (8)
1. A steel strand replacement continuous tensioning device suitable for a compact working space is characterized in that: the device comprises a first adjusting screw rod group and a second adjusting screw rod group, wherein the first adjusting screw rod group and the second adjusting screw rod group penetrate through a supporting plate, the first adjusting screw rod group corresponds to a first jacking jack group, the second adjusting screw rod group corresponds to a second jacking jack group, the first jacking jack group is arranged between the first adjusting screw rod group and an anchoring block, and the second jacking jack group is arranged between the second adjusting screw rod group and the anchoring block; the support plate is provided with a threading hole, the steel strand penetrates through the threading hole, the steel strand is provided with a single-hole clamping piece anchor, and the single-hole clamping piece anchor abuts against the end face of the support plate.
2. The continuous strand replacement tensioning device adapted to a compact working space of claim 1, wherein: the support plate is provided with N threaded holes which are uniformly distributed in the circumferential direction, the threaded holes correspond to the first adjusting screw rod group and the second adjusting screw rod group, and the first adjusting screw rod group and the second adjusting screw rod group are respectively in threaded connection with the support plate.
3. The continuous strand replacement tensioning device adapted to a compact working space of claim 2, wherein: and N is any integer between 4 and 10.
4. The continuous strand replacement tensioning device adapted to a compact working space of claim 2, wherein: the first adjusting screw group comprises a plurality of first adjusting screws, the second adjusting screw group comprises a plurality of second adjusting screws, and the first adjusting screws and the second adjusting screws are staggered.
5. The continuous strand replacement tensioning apparatus for accommodating a compact working space of claim 4, wherein: the bottom of one of the first adjusting screw rods in the first adjusting screw rod group, the bottom of one of the second adjusting screw rods in the second adjusting screw rod group and the bottom of the single-hole clamping piece anchor are respectively provided with a pressure sensor.
6. The continuous strand replacement tensioning device adapted to a compact working space of claim 1, wherein: the first lifting jack group comprises a plurality of first lifting jacks, the second lifting jack group comprises a plurality of second lifting jacks, the first lifting jacks are respectively communicated with the first total oil pipe through first oil distribution pipes, and the second lifting jacks are respectively communicated with the second total oil pipe through second oil distribution pipes; the first total oil pipe and the second total oil pipe are respectively connected to the pump station control system.
7. The continuous strand replacement tensioning device adapted to a compact working space of claim 5, wherein: the first total oil pipe is provided with a first distribution valve, and the second total oil pipe is provided with a second distribution valve.
8. The continuous strand replacement tensioning device adapted to a compact working space of claim 1, wherein: the anchor plate is characterized by further comprising a base plate, wherein the base plate is arranged on the outer side of the anchor plate, positioning connecting holes are respectively formed in the base plate, and the first lifting jack and the second lifting jack are respectively arranged in the positioning connecting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321517494.1U CN220224986U (en) | 2023-06-14 | 2023-06-14 | Steel strand replacement continuous tensioning device suitable for compact operation space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321517494.1U CN220224986U (en) | 2023-06-14 | 2023-06-14 | Steel strand replacement continuous tensioning device suitable for compact operation space |
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| Publication Number | Publication Date |
|---|---|
| CN220224986U true CN220224986U (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321517494.1U Active CN220224986U (en) | 2023-06-14 | 2023-06-14 | Steel strand replacement continuous tensioning device suitable for compact operation space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220224986U (en) |
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2023
- 2023-06-14 CN CN202321517494.1U patent/CN220224986U/en active Active
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