CN2440798Y - Front blocked jack - Google Patents
Front blocked jack Download PDFInfo
- Publication number
- CN2440798Y CN2440798Y CN 00207087 CN00207087U CN2440798Y CN 2440798 Y CN2440798 Y CN 2440798Y CN 00207087 CN00207087 CN 00207087 CN 00207087 U CN00207087 U CN 00207087U CN 2440798 Y CN2440798 Y CN 2440798Y
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- jack
- piston
- roof pressure
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a front blocked single stretching jack which comprises an oil cylinder, and a piston and a guide sleeve which are arranged in the oil cylinder, wherein the guide sleeve is in a circular tube shape, and one end is provided with an internal taper. The size of the internal taper is identical to the size of the taper of a tool clamping piece, and the direction of the internal taper is opposite to the direction of the taper of the tool clamping piece. The tool clamping piece is fastened at the taper in the guide sleeve. The big end of the tape is orderly provided with a top cylinder I, a top cylinder II and a screw nut. The screw nut is tightly connected with the bottom end of the guide sleeve in the screwed connection mode. The bottom end of the guide sleeve and the oil cylinder are provided with rotation stop grooves which are mutually matched. An anchor retrograding tube which is positioned at the top end of the guide sleeve pushes the small end of the tool clamping piece, and a front end plug seals the other end of the oil cylinder. The stress of the jack is good, the jack is safe in use, and the utility model is convenient for the tool clamping piece to maintain and replace.
Description
The utility model relates to a kind of vehicle for construction, especially for the preceding cassette single tendon stretch jack of tensioned prestressing bar.
Development along with prestressing technique, unit in charge of construction is more and more higher to the performance requriements of prestress facility each side, the fore-clamp of single tendon stretch jack is the developing direction of jack, but there is following deficiency in cassette single tendon stretch jack before existing: the access times of moveable anchor intermediate plate are indefinite factors, thereby need often change, though and the moveable anchor intermediate plate often will disassemble maintaining, and the structure (referring to Fig. 4) of cassette single tendon stretch jack before existing has determined the maintenance of its moveable anchor intermediate plate and has changed relatively difficulty; Main stressed part: anchor cup, coupling nut and punching cover are threaded, because the rotation of steel strand when tension, anchor cup, coupling nut and punching are with loosening danger, and what influence was constructed normally carries out.The preceding cassette single tendon stretch jack of existing band top pressing device will have three or four oil outlet pipes, and it is very inconvenient to work.
The purpose of this utility model be to provide a kind of maintenance of being convenient to the instrument intermediate plate and replacing, stressed good, use safer preceding cassette single tendon stretch jack.
For reaching above-mentioned purpose, terms of settlement of the present utility model is: anchor cup, coupling nut and punching cover are made of one, make a kind of later-model punching cover.Its concrete technical scheme is: this preceding cassette single tendon stretch jack, comprise oil cylinder and be assemblied in in-oil cylinder piston successively, the punching cover, described punching cover is the tubular that an end has internal taper, this internal taper is identical with instrument intermediate plate tapering size, direction is opposite, the instrument intermediate plate is stuck in band tapering place in the punching cover, its stub end is equipped with the top tube I of band top pressure spring successively, top tube II and nut, nut closely links to each other with punching cover bottom by thread connecting mode, have the spline groove of working in coordination on punching cover bottom and the oil cylinder, be positioned at the small end that anchor tube withstands the instrument intermediate plate that moves back on punching cover top, the preceding plug that is enclosed within on the piston links to each other with oil cylinder by thread connecting mode, seals the oil cylinder other end.
As another kind of version of the present utility model be: anchor tube one end that moves back of this jack also is connected with a top pressing device that is made of roof pressure oil cylinder, roof pressure piston, retracting spring, roof pressure head, the roof pressure oil cylinder of this top pressing device is enclosed within the piston of main jack, withstand and move back anchor tube and link to each other with piston by screw thread, the roof pressure head links to each other with the roof pressure oil cylinder by thread connecting mode, have elongated oil through A on the piston of main jack, one oil through C is arranged on the roof pressure oil cylinder, and oil through A communicates by inclined oil hole of air B with oil through C.
Owing to adopt said structure, the utlity model has following advantage:
1, the utility model adopts the punching nested structure form that punching cover, coupling nut and anchor cup are made of one, thereby do not exist in the original design because the loosening danger that produces of punching cover, coupling nut and anchor cup, add on punching cover and the oil cylinder and have the spline groove that cooperatively interacts, punching cover and oil cylinder can not be relatively rotated, and jack uses safer.
2, punching cover, coupling nut and anchor cup are made of one, and pull down nut, take down top tube II, top pressure spring and top tube I and just can take out the moveable anchor intermediate plate, make things convenient for the maintenance and the replacing of moveable anchor intermediate plate.
3, be drilled with an elongated oil through on the piston wall, the oil back chamber of jack is connected with the roof pressure chamber of top pressing device, reduce by an oil outlet pipe, convenient construction.
Below, the architectural feature to cassette single tendon stretch jack before the utility model is described further in conjunction with the accompanying drawings and embodiments.
Fig. 1 is a cassette single tendon stretch jack structure scheme drawing before the utility model;
Fig. 2 is embodiment two a cassette single tendon stretch jack structure scheme drawing before;
Fig. 3 is that Fig. 1 removes M behind the nut 14 to view;
Fig. 4 is existing preceding cassette single tendon stretch jack structure scheme drawing.
Among Fig. 4,21-oil cylinder, 22-piston, 23-punching cover, 24-coupling nut, 25-anchor cup, 26-top pressure spring, 27-top cover, 28-instrument intermediate plate, 29-roof pressure oil cylinder, 30-roof pressure piston, 31-move back anchor tube.
Embodiment one
Cassette single tendon stretch jack before a kind of.As shown in Figure 1, it is by oil cylinder 1 and be contained in piston 2 and punching cover 3, top pressure spring 4, top tube I 5, instrument intermediate plate 6, a preceding plug 7 in the oil cylinder 1 successively, move back anchor tube 8, top tube II 13 and nut 14 and form; Punching cover 3 is the tubular that an end has internal taper, this internal taper is identical with instrument intermediate plate tapering size, direction is opposite, instrument intermediate plate 6 is stuck in band tapering place in the punching cover 3, its stub end is equipped with the top tube I 5 of band top pressure spring 4 successively, top tube II 13 and nut 14, nut 14 overlaps 3 bottoms by thread connecting mode and punching and closely links to each other, punching is overlapped and is had the spline groove (referring to Fig. 3) of working in coordination on 3 bottoms and the oil cylinder 1, be positioned at punching and overlap the small end that anchor tube 8 withstands instrument intermediate plate 6 that moves back on 3 tops, the preceding plug 7 that is enclosed within on the piston 2 links to each other with oil cylinder 1 by thread connecting mode, seals oil cylinder 1 other end.
Embodiment two
Cassette single tendon stretch jack before the band top pressing device.As shown in Figure 2, it is made up of main jack and top pressing device two big parts, main jack is the same with the structure of the foregoing description one preceding cassette single tendon stretch jack, only anchor tube 8 one ends that move back at main jack also are connected with one by roof pressure oil cylinder 9, roof pressure plug cock 10, retracting spring 11, the top pressing device that roof pressure head 12 constitutes, the roof pressure oil cylinder 9 of this top pressing device is enclosed within the piston 2 of main jack, withstand and move back anchor tube 8 and link to each other with piston 2 by screw thread, roof pressure head 12 links to each other with roof pressure oil cylinder 9 by thread connecting mode, have elongated oil through A on the piston 2 of main jack, one oil through C is arranged on the roof pressure oil cylinder 9, and oil through A communicates by inclined oil hole of air B with oil through C.
Claims (2)
1, cassette single tendon stretch jack before a kind of, comprise oil cylinder (1) and be assemblied in the interior piston (2) of oil cylinder (1) successively, punching cover (3), it is characterized in that: described punching cover (3) is the tubular that an end has internal taper, this internal taper is identical with instrument intermediate plate tapering size, direction is opposite, instrument intermediate plate (6) is stuck in band tapering place in the punching cover (3), its stub end is equipped with the top tube I (5) of band top pressure spring (4) successively, top tube II (13), nut (14) closely links to each other with punching cover (3) bottom by thread connecting mode, have the spline groove of working in coordination on punching cover (3) and the oil cylinder (1), the anchor tube (8) that moves back that is positioned at punching cover (3) top withstands the small end of instrument intermediate plate (6), the preceding plug (7) that is enclosed within on the piston (2) links to each other with oil cylinder (1) by thread connecting mode, seals oil cylinder (1) other end.
2, cassette single tendon stretch jack before as claimed in claim 1, it is characterized in that: anchor tube (8) one ends that move back of this jack also are connected with one by roof pressure oil cylinder (9), roof pressure piston (10), retracting spring (11), the top pressing device that roof pressure head (12) constitutes, the roof pressure oil cylinder (9) of this top pressing device is enclosed within the piston (2) of main jack, withstand and move back anchor tube (8) and link to each other with piston (2) by screw thread, roof pressure head (12) links to each other with roof pressure oil cylinder (9) by thread connecting mode, have elongated oil through (A) on the piston of main jack (2), one oil through (C) is arranged on the roof pressure oil cylinder (9), and oil through (A) communicates by inclined oil hole of air (B) with oil through (C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00207087 CN2440798Y (en) | 2000-04-20 | 2000-04-20 | Front blocked jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00207087 CN2440798Y (en) | 2000-04-20 | 2000-04-20 | Front blocked jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2440798Y true CN2440798Y (en) | 2001-08-01 |
Family
ID=33574853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00207087 Expired - Fee Related CN2440798Y (en) | 2000-04-20 | 2000-04-20 | Front blocked jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2440798Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337911A (en) * | 2011-08-31 | 2012-02-01 | 泰安科大洛赛尔传感技术有限公司 | Hydraulic front-clamp type anchor cable tensioning machine tool and operating method thereof |
| CN103224204A (en) * | 2013-05-13 | 2013-07-31 | 蔡青林 | Lifting jack for tensioning equipment |
| CN104860226A (en) * | 2015-04-27 | 2015-08-26 | 同济大学 | Prestress tensioning jack equipment with adjustable limiting device |
| CN110485457A (en) * | 2019-09-06 | 2019-11-22 | 柳州欧维姆机械股份有限公司 | A kind of screw thread rod iron and presstressed reinforcing steel connector and its construction method for connection |
| CN114620636A (en) * | 2022-04-26 | 2022-06-14 | 杨军 | Tensioning jack |
-
2000
- 2000-04-20 CN CN 00207087 patent/CN2440798Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337911A (en) * | 2011-08-31 | 2012-02-01 | 泰安科大洛赛尔传感技术有限公司 | Hydraulic front-clamp type anchor cable tensioning machine tool and operating method thereof |
| CN103224204A (en) * | 2013-05-13 | 2013-07-31 | 蔡青林 | Lifting jack for tensioning equipment |
| CN104860226A (en) * | 2015-04-27 | 2015-08-26 | 同济大学 | Prestress tensioning jack equipment with adjustable limiting device |
| CN110485457A (en) * | 2019-09-06 | 2019-11-22 | 柳州欧维姆机械股份有限公司 | A kind of screw thread rod iron and presstressed reinforcing steel connector and its construction method for connection |
| CN114620636A (en) * | 2022-04-26 | 2022-06-14 | 杨军 | Tensioning jack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20010801 |