CN86209683U - Prestressed stretching device suitable for box steel beam - Google Patents
Prestressed stretching device suitable for box steel beam Download PDFInfo
- Publication number
- CN86209683U CN86209683U CN 86209683 CN86209683U CN86209683U CN 86209683 U CN86209683 U CN 86209683U CN 86209683 CN86209683 CN 86209683 CN 86209683 U CN86209683 U CN 86209683U CN 86209683 U CN86209683 U CN 86209683U
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- CN
- China
- Prior art keywords
- hinge
- connecting hinge
- prestressed
- bearing
- main beam
- 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.)
- Withdrawn
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Abstract
The utility model relates to prestressed stretching device which is suitable to be used for repairing the down-warping of box-shaped steel beam, in particular the main beam of a gantry crane, comprising a connecting hinge (5) which can slide on a supporting seat (14) of the connecting hinge. One end of the connecting hinge is connected with a screw draw rod (6), and the other end of the connecting hinge is connected with a steel cable; the steel cable bypasses a fixed assembly pulley (16). When a nut (12) is turned, the screw draw rod and the connecting hinge move together to make the steel cable stretch, so the main beam of a crane is forced to rise, and the purpose of repairing the down-warping of the main beam of the crane is achieved.
Description
The utility model is a kind of box steel beam that is applicable to, particularly the prestressing apparatus of bridging crane main beam lower flexure strain reparation.
In prior art, repair the bridging crane main beam downwarp, general two ends at the crane girder lower cover are welded two supporting bases and are put on many lacing wires, and the nut in the rotation lacing wire makes the lacing wire tension and makes girder arch (referring to " the bridge-type universal crane uses and keeps in repair " of Heilungkiang science and technology publishing house publication in October nineteen eighty-three---Zhu Shiyi volume).This method adopts single executing to draw, and the lacing wire that has post tensioning is to the compressive strain that beam produces, and the reinforcement stress of stretch-draw is lax before causing, causes the stress of every lacing wire not wait, defectives such as the easy fracture of posttension lacing wire.
The purpose of this utility model is to overcome above-mentioned shortcoming, provides a kind of simple in structure, the uniform prestressed tensioner of tension stress.
Design of the present utility model is: the connection hinged-support of forming with section bar or weldment is fixed on an end of bridging crane main beam, and connecting hinge can slide in this bearing.Connect hinge one end and be connected with thread, the other end is connected with many wire rope.Also be provided with a bearing near connecting hinged-support.Thread passes the sleeve of this bearing, and sleeve is affixed with time wall of gusset and bearing.The other end of crane girder is provided with the fixed block group.Wire rope is walked around pulley, and its two ends are fixed on and connect on the hinge, perhaps is separately fixed to connect on hinge and the fixing hinge.When rotation during with nut that thread matches, can only slide and can not rotate owing to connect hinge, make thread and is connected hinge, thereby make wire rope stretch-draw together axially to mobile, force crane girder to arch up, reach the purpose of reparation girder bending-down.Connect on the hinge because an end of the utility model wire rope or two ends are fixed on, when the connection hinge was mobile backward, the amount of tension of every wire rope equated, thereby the tensile stress of being born is also equal substantially.
The utility model also can be used for the reparation of bridging crane main beam side sway.
The utility model has not only solved the problem that reinforcement stress does not wait, and simple in structure, good manufacturability, and in light weight, volume is little, and low cost of manufacture is easy for installation.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is the B-B sectional drawing of Fig. 1;
Fig. 4, Fig. 5 are respectively scheme of installations of the present utility model.
Embodiment of the present utility model: it is affixed with wire rope with pressing plate (3) and double-screw bolt (2) to connect hinge (5) one ends.During the dress wire rope, 3 strands or multistrand rope alignment, firm and penetrate in the pouring basin of rope end (1) with the thin wire colligation near the fag end place, then fag end is broken curve 90 hook-shaped, solid dead with the babbit casting, again casting gate (1) is embedded in the wedge-shaped slot that connects on the hinge, screw bolt (2) after covering with pressing plate (3).One end of thread is hinged with being connected with bearing pin (4), and the other end passes the sleeve (15) of bearing (8).For reducing the suffered torque of thread and the frictional resistance of bearing (8) end face, be provided with bearing keeper (9) and single thrust bearing (10).Swivel nut (12), by pad (11), bearing (10) and bearing fixing part (9) make the thread displacement, thus stretching wire rope (18) makes the girder arch of bridge crane.Connecting hinge (5) can slide in the groove of the connection hinged-support of being made up of two weldments (14).Connect the end that hinged-support (14) and bearing (8) are welded on the crane girder lower cover.The other end of girder lower cover is provided with fixed block group (16).When nut (7), (13) can guarantee bridge crane work, nut (12) can not get loose.The screw thread of thread is trapezoidal, preferably guarantees its self-locking performance when being provided with.
Fig. 4 is the installment state of required working pulling force less than the tensioning equipment ultimate tension.The two ends of every wire rope are fixed on and connect on the hinge.Fig. 5 be required working pulling force greater than the tensioning equipment ultimate tension installment state less than 2 times of tensioning equipment ultimate tensions.At this moment, an end of wire rope is fixed on and connects on the hinge, and the other end is fixed on the fixing hinge (19).Fixedly hinge is welded on the place near tensioner.Support (17) and be used for preventing the wire rope shake.
Claims (4)
1, a kind of box steel beam that is used for, the prestressed tensioner repaired of bridging crane main beam downwarp particularly, bearing (8) and the nut (12) affixed by thread (6) and crane girder constitute, it is characterized in that connecting hinge (5) one ends is connected with wire rope with double-screw bolt (2) with pressing plate (3), the other end is connected with thread (6) with bearing pin (4), and connecting hinge can move in connecting hinged-support (14).
2, prestressed tensioner according to claim 1 is characterized in that connecting hinged-support (14) and is made up of two section bars that are separated or weldment, and one end and bridging crane main beam are affixed.
3,, it is characterized in that wire rope (18) is fixed in the wedge-shaped slot that connects hinge (5) according to claim 1,2 described prestressed tensioners.
4, prestressed tensioner according to claim 1 is characterized in that bearing (8) is provided with gusset and the affixed sleeve (15) of this seating wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86209683 CN86209683U (en) | 1986-11-29 | 1986-11-29 | Prestressed stretching device suitable for box steel beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86209683 CN86209683U (en) | 1986-11-29 | 1986-11-29 | Prestressed stretching device suitable for box steel beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86209683U true CN86209683U (en) | 1987-11-11 |
Family
ID=4811526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86209683 Withdrawn CN86209683U (en) | 1986-11-29 | 1986-11-29 | Prestressed stretching device suitable for box steel beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86209683U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730553A (en) * | 2011-04-12 | 2012-10-17 | 卢金长 | Bridge crane additionally provided with prestressed reinforcement |
| CN103949501A (en) * | 2014-04-29 | 2014-07-30 | 福建省环境工程有限公司 | Device for repairing down warping of main beam of bridge crane |
| CN106149575A (en) * | 2016-08-22 | 2016-11-23 | 东南大学 | Prestress rope tensioning system and method |
-
1986
- 1986-11-29 CN CN 86209683 patent/CN86209683U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730553A (en) * | 2011-04-12 | 2012-10-17 | 卢金长 | Bridge crane additionally provided with prestressed reinforcement |
| CN103949501A (en) * | 2014-04-29 | 2014-07-30 | 福建省环境工程有限公司 | Device for repairing down warping of main beam of bridge crane |
| CN106149575A (en) * | 2016-08-22 | 2016-11-23 | 东南大学 | Prestress rope tensioning system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Co-applicant after: Fu Guohua Co-applicant after: Fu Ping Co-applicant after: Fu Guoying Co-applicant after: Huang Shuixiang Co-applicant before: Fu Ping |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-APPLICANT; FROM: FU PING TO: FU GUOHUA; FU PING; FU GUOYING; HUANG SHUIXIANG; CO-APPLICANT; FROM: FU PING TO: FU GUOHUA; FU PING; FU GUOYING; HUANG SHUIXIANG |
|
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |