CN203269457U - Steel strand pre-tightening device - Google Patents
Steel strand pre-tightening device Download PDFInfo
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- CN203269457U CN203269457U CN 201320102166 CN201320102166U CN203269457U CN 203269457 U CN203269457 U CN 203269457U CN 201320102166 CN201320102166 CN 201320102166 CN 201320102166 U CN201320102166 U CN 201320102166U CN 203269457 U CN203269457 U CN 203269457U
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- steel strand
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- tightening
- claw
- deck
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Abstract
The utility model provides a steel strand pre-tightening device, belongs to the technical field of hoisting machinery installing, and is particularly applied to installing and constructing of steel strand type hydraulic lifting equipment. The device is of a symmetric structure, and comprises a support block, a compression mechanism and a strand tightening mechanism, and the compression mechanism and the strand tightening mechanism are respectively connected with the support block. The steel strand pre-tightening device is installed on the upper part of the steel strand type hydraulic lifting equipment, so that the uniform pre-tightening force on all steel strands on the same hydraulic lifting equipment can be ensured; when multiple pieces of hydraulic lifting equipment simultaneously adopt the steel strand pre-tightening devices for pre-tightening, the load balance of a stressed system can be ensured. The flexible function of the hydraulic lifting equipment jack is utilized, manual pre-tightening is not needed, steel strands on the single jack are pre-tightened for one time, and meanwhile, the device can be used to carry out cluster pre-tightening, the pre-tightening efficiency is improved, the labor strength is lowered, and the pre-tightening quality is ensured.
Description
Technical field
The utility model belongs to the elevator machinery technical field, is specifically related to a kind of steel strand pre-tightening apparatus for steel strand formula hydraulic lifting device.
Background technology
Cable hydraulic lifting device is the Novel hoisting apparatus that a kind of volume is little, load-carrying ability is large.Hydraulic lifting apparatus adopts prestress wire as bearing medium, alternately tightens steel strand by upper and lower clamping body, coordinates the flexible of hydraulic pressure jack piston, realizes lifting, the construction in place of steel strand lower ends firm demand.According to the difference of hydraulic lifting apparatus load-carrying capacity, the required steel strand radical of hydraulic jack does not wait from one to tens of, and needs several or tens of hydraulic jacks to carry out cluster work.
Because hydraulic lifting apparatus separate unit hydraulic jack needs many steel strand, if the tensile force of every steel strand is inconsistent, may cause indivedual cable wires due to stressed excessive and disrumpent feelings, even produce chain reaction and cause whole bundle steel strand fracture; Due to the work of many hydraulic jack clusters of hydraulic lifting apparatus, if between every hydraulic jack, the tensile force of cable wire bundle is inconsistent, may cause promoting the system unbalance stress, even equipment or suspended object structure are damaged.According to above-mentioned two situations, steel strand pretension and the initial predetermincd tension that guarantees all steel strand are unanimously become one of important safety safeguard that hydraulic lifting apparatus uses.
Pre-tension method of the prior art is for by to the steel strand mode of pretension one by one, and must manually adjust one by one steel stranded wire clamper.Traditional firmly beforehand means utilizes chain block to coordinate draw-bar donamometer to carry out the pretension of single steel strand for by stringing handle and steel stranded wire clamper clamping steel strand.Application number is that 200410002193.0 utility model patent discloses a kind of pre-tension method to the lifting steel strand in the continuance lifting jack, unclamps pressing plate on the front end jack in the continuance lifting jack and the intermediate plate on anchor slab after completing prior step; Be contained in each root steel strand on the continuance lifting jack with a sub-folder sheet, implement pretension one by one, the pressing plate that will unclamp again at last and the intermediate plate on anchor slab put in back in anchor slab on front end jack in the continuance lifting jack each root steel strand anchoring are completed.Development due to hydraulic lifting apparatus, the required steel strand quantity of separate unit hydraulic jack, the required jack quantity of cluster work all constantly increase, in the single construction, nearly hundred to hundreds of of the quantity of required pretension steel strand do not wait, carry out one by one that the operating process of steel strand pretension is loaded down with trivial details, efficient is low, labour intensity is large.The mode of pretension also may be owing to making the subtle change of suspended object hanging structure angle after part steel strand pretension one by one, and causing, the pretension effect of pretension steel strand reduces.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of steel strand pre-tightening apparatus, need not manually to adjust fixture, the disposable pretension of separate unit hydraulic jack steel strand, use simultaneously this device can carry out the cluster pretension, improve pretension efficient, reduced labour intensity, guaranteed the pretension quality.
To achieve these goals, the utility model is taked following scheme:
A kind of steel strand pre-tightening apparatus is provided, and described steel strand are prestress wire; Described device is symmetrical structure, comprises tray, compressing mechanism and thread tensioning mechanism; Described compressing mechanism is connected with thread tensioning mechanism with described tray and is connected.
Described tray is stepped appearance, comprises tray body and the tray base that is positioned at described tray body bottom.
Described compressing mechanism comprises top board, Compress Spring and guide pillar, and described guide pillar passes described tray base, Compress Spring and top board from bottom to top successively, and its top is connected with described top board by bolt.
Described guide pillar is positioned at the cross-sectional area of tray base bottom part greater than the cross-sectional area that is positioned at tray base top.
Described thread tensioning mechanism comprises extension spring, claw pressing plate, claw, deck pressing plate, deck and stringing spring; Described extension spring one end is connected with the claw pressing plate, and its other end is connected with the tray base, and claw is pressed into deck; Described steel strand pass top board, claw pressing plate, claw, deck pressing plate, deck, stringing spring and tray body from top to bottom successively.
Described stringing spring and deck are arranged in the circular hole that the tray body is provided with.
Described deck pressing plate is connected with described deck by bolt.
Described claw and deck are wedge structure, make the relative claw perpendicular movement of described steel strand.
Described Compress Spring and stringing spring are cylindrical spring; Described extension spring is the extension spring of side hook, long hook extension spring, English hook extension spring, the extension spring of moral formula hook, the extension spring of semicircle hook or the extension spring of duckbilled hook.
The quantity of described steel strand all equates with the quantity of described stringing spring and claw.
Compared with prior art, the beneficial effects of the utility model are:
1. take the steel strand firmly beforehand means of all steel strand while pretensions on same hydraulic lifting device to carry out the steel strand pretension, both guaranteed pretension efficient, alleviated again labour intensity;
2. the utility model utilizes the Telescopic of hydraulic lifting device jack, need not manually to adjust steel stranded wire clamper, and is simple in structure, and operation is convenient, has simplified the pretension step;
3. the predetermincd tension difference that can avoid pretension one by one to bring has improved the pretension quality;
4. can by changing different preloading springs, conveniently satisfy the requirement of different predetermincd tensions.
Description of drawings
Fig. 1 is steel strand pre-tightening apparatus structural representation in the utility model embodiment;
Fig. 2 is the local enlarged diagram of steel strand pre-tightening apparatus structural representation I in the utility model embodiment;
Fig. 3 is steel strand pre-tightening apparatus scheme of installation in the utility model embodiment;
Fig. 4 is that the master cylinder of hydraulic lifting device in the utility model embodiment stretches out and holds the tray schematic diagram;
Fig. 5 is that the master cylinder of hydraulic lifting device in the utility model embodiment stretches out and makes tray upward movement schematic diagram;
Fig. 6 is that the master cylinder retraction tray of hydraulic lifting device in the utility model embodiment moves downward schematic diagram;
Fig. 7 is that the master cylinder of hydraulic lifting device in the utility model embodiment stretches out and makes tray upward movement schematic diagram;
Fig. 8 is that the master cylinder retraction of hydraulic lifting device in the utility model embodiment is completed steel strand pretension schematic diagram;
Wherein, 1-steel strand pre-tightening apparatus, 2-hydraulic lifting device, 3-bearing beam, 4-steel strand, 5-weight, the 6-anchor head, 7-top board, 8-Compress Spring, 9-extension spring, 10-tray, 11-guide pillar, the 12-bolt, 13-claw pressing plate, 14-claw, 15-deck pressing plate, 16-deck, 17-stringing spring.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Fig. 1, a kind of steel strand pre-tightening apparatus is provided, described steel strand 4 are prestress wire; Described device is symmetrical structure, comprises tray 10, compressing mechanism and thread tensioning mechanism; Described compressing mechanism is connected with thread tensioning mechanism with described tray 10 and is connected.
Described tray 10 is stepped appearance, comprises tray body and the tray base that is positioned at described tray body bottom.
Described compressing mechanism comprises top board 7, Compress Spring 8 and guide pillar 11, and described guide pillar 11 passes described tray base, Compress Spring 8 and top board 7 from bottom to top successively, and its top is connected with described top board 7 by bolt 12.
Described guide pillar 11 is positioned at the cross-sectional area of tray base bottom part greater than the cross-sectional area that is positioned at tray base top.
As Fig. 2, described thread tensioning mechanism comprises extension spring 9, claw pressing plate 13, claw 14, deck pressing plate 15, deck 16 and stringing spring 17; Described extension spring 9 one ends are connected with claw pressing plate 13, and its other end is connected with the tray base, and claw 14 is pressed into deck 16; Described steel strand 4 pass top board 7, claw pressing plate 13, claw 14, deck pressing plate 15, deck 16, stringing spring 17 and tray body from top to bottom successively.
Described stringing spring 17 and deck 16 are arranged in the circular hole that the tray body is provided with.
Described deck pressing plate 15 is connected with described deck 16 by bolt.
Described claw 14 and deck 16 are wedge structure, make the relative claw 14 of described steel strand 4 upward movement in vertical direction.When the relative claw 14 of steel strand 4 moved downward, steel strand 4, claw 14 and deck 16 were self-locking in together.
Described Compress Spring 8 and stringing spring 17 are cylindrical spring; Described extension spring 9 is the extension spring of side hook, long hook extension spring, English hook extension spring, the extension spring of moral formula hook, the extension spring of semicircle hook or the extension spring of duckbilled hook.
The quantity of described steel strand 4 all equates with the quantity of described stringing spring 17 and claw 14.
As Fig. 3, steel strand pre-tightening apparatus 1 is installed on hydraulic lifting device 2 tops, and hydraulic lifting device 2 is installed on bearing beam 3 tops.Anchor head 6 is installed on the bottom of weight 5.During installation, steel strand 4 are generally passed anchor head 6, weight 5, bearing beam 3, hydraulic lifting device 2, steel strand pre-tightening apparatus 1 from bottom to top successively.Steel strand 4 are locked by claw 14 with anchor head 6.Steel strand 4 quantity on hydraulic lifting device 2 are generally one to tens of and do not wait.The quantity of claw 14 grades on pre-tightening apparatus 1 is identical with steel strand 4 quantity.After installation, steel strand 4 degrees of tightness differ.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment, the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (7)
1. steel strand pre-tightening apparatus, it is characterized in that: described device comprises tray, compressing mechanism and thread tensioning mechanism; Described compressing mechanism is connected with thread tensioning mechanism with described tray and is connected;
Described tray is stepped appearance, comprises tray body and the tray base that is positioned at described tray body bottom;
Described compressing mechanism comprises top board, Compress Spring and guide pillar, and described guide pillar passes described tray base, Compress Spring and top board from bottom to top successively, and its top is connected with described top board by bolt;
Described thread tensioning mechanism comprises extension spring, claw pressing plate, claw, deck pressing plate, deck and stringing spring; Described extension spring one end is connected with the claw pressing plate, and its other end is connected with the tray base, and claw is pressed into deck; Described steel strand pass top board, claw pressing plate, claw, deck pressing plate, deck, stringing spring and tray body from top to bottom successively.
2. steel strand pre-tightening apparatus according to claim 1 is characterized in that: described guide pillar is positioned at the cross-sectional area of tray base bottom part greater than the cross-sectional area that is positioned at tray base top.
3. steel strand pre-tightening apparatus according to claim 1 is characterized in that: described stringing spring and deck are arranged in the circular hole that the tray body is provided with.
4. steel strand pre-tightening apparatus according to claim 1, it is characterized in that: described deck pressing plate is connected with described deck by bolt.
5. steel strand pre-tightening apparatus according to claim 1, it is characterized in that: described claw and deck are wedge structure, make the relative claw perpendicular movement of described steel strand.
6. steel strand pre-tightening apparatus according to claim 1, it is characterized in that: described Compress Spring and stringing spring are cylindrical spring; Described extension spring is the extension spring of side hook, long hook extension spring, English hook extension spring, the extension spring of moral formula hook, the extension spring of semicircle hook or the extension spring of duckbilled hook.
7. steel strand pre-tightening apparatus according to claim 1, it is characterized in that: the quantity of described steel strand all equates with the quantity of described stringing spring and claw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320102166 CN203269457U (en) | 2013-03-06 | 2013-03-06 | Steel strand pre-tightening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320102166 CN203269457U (en) | 2013-03-06 | 2013-03-06 | Steel strand pre-tightening device |
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| Publication Number | Publication Date |
|---|---|
| CN203269457U true CN203269457U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320102166 Expired - Lifetime CN203269457U (en) | 2013-03-06 | 2013-03-06 | Steel strand pre-tightening device |
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| CN (1) | CN203269457U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332637A (en) * | 2013-03-06 | 2013-10-02 | 中国电力科学研究院 | Steel strand pretightening device |
| CN104085832A (en) * | 2014-07-17 | 2014-10-08 | 北京市建筑工程研究院有限责任公司 | Flexible component lifting device and lifting method thereof |
| CN107894443A (en) * | 2017-09-29 | 2018-04-10 | 长安大学 | It is a kind of to be used to monitor anchoring elastic piezoelectric ceramics system and monitoring method |
-
2013
- 2013-03-06 CN CN 201320102166 patent/CN203269457U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332637A (en) * | 2013-03-06 | 2013-10-02 | 中国电力科学研究院 | Steel strand pretightening device |
| CN103332637B (en) * | 2013-03-06 | 2015-07-08 | 中国电力科学研究院 | Steel strand pretightening device |
| CN104085832A (en) * | 2014-07-17 | 2014-10-08 | 北京市建筑工程研究院有限责任公司 | Flexible component lifting device and lifting method thereof |
| CN104085832B (en) * | 2014-07-17 | 2016-09-07 | 北京市建筑工程研究院有限责任公司 | A kind of method for improving of flexible member lifting device |
| CN107894443A (en) * | 2017-09-29 | 2018-04-10 | 长安大学 | It is a kind of to be used to monitor anchoring elastic piezoelectric ceramics system and monitoring method |
| CN107894443B (en) * | 2017-09-29 | 2024-04-12 | 长安大学 | Piezoelectric ceramic system for monitoring anchoring tightness and monitoring method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
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| CX01 | Expiry of patent term |