CN205259620U - Measurement device for be used for automatic push -pull system prestressing tendons elongation of opening of indisputable road bridge roof beam prestressing force - Google Patents
Measurement device for be used for automatic push -pull system prestressing tendons elongation of opening of indisputable road bridge roof beam prestressing force Download PDFInfo
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- CN205259620U CN205259620U CN201521097878.8U CN201521097878U CN205259620U CN 205259620 U CN205259620 U CN 205259620U CN 201521097878 U CN201521097878 U CN 201521097878U CN 205259620 U CN205259620 U CN 205259620U
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- displacement transducer
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- jack
- prestressing force
- inner sleeve
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Abstract
The utility model belongs to measuring device especially indicates a measurement device for be used for automatic push -pull system prestressing tendons elongation of opening of indisputable road bridge roof beam prestressing force. Including the jack, with the displacement sensor of jack piston linkage, displacement sensor passes through link plate elasticity roof pressure in jack piston surface with the jack piston with axial setting and its stiff end and jack external fixation, displacement sensor's work end. It has solved the measurement accuracy subalternation problem that exists among the prior art. Have advantages such as measurement accuracy height, application scope is wide, measurement mode is simple.
Description
Technical field
The utility model belongs to measurement mechanism, refers to especially a kind of for railroad bridge prestressing force automatic TensioningThe measurement mechanism of system presstressed reinforcing steel elongation.
Background technology
Tension of prestressed tendon is the critical process of prestressed reinforced concrete construction, and construction quality is related to bridgeLife-span and personal safety. When pre-stress construction, control with tension stress, with the elongation of presstressed reinforcing steelAmount is checked, and is commonly called as " dual control ". And the control of elongation plays an important role to prestressed applying,The prerequisite that elongation measures, also directly has influence on the stress performance of prestress application and structure. Steel strand wires are realThe measuring method of border elongation has varied, and what automatic Tensioning equipment use was at present more is direct measurementThe method of stretching end jack piston overhang, majority is to open an annular circle at jack piston external part placeGroove, is stuck in cannelure with a clamp, and clamp and displacement transducer link together, and piston stretches out driveClamp stretches out, and piston retraction drives clamp retraction to realize the measurement of displacement. Above-mentioned measuring method is owing to being subject toThe impact in clamp and cannelure gap, produces considerable influence to the accuracy of measuring. When piston stretches out, cardThe rear end face of plate and the laminating of cannelure pit position, could realize measurement; When piston retraction, the front end of clampFace and the laminating of piston nose face, the pull bar of displacement transducer and clamp combination bounce back with piston. At every turnWhen piston stretches out, only overcome the rear end face gap of clamp rear end face and cannelure, just can carry out substanceMeasurement. Displacement measurement trueness error is difficult to guarantee, and along with the prolongation of time, cannelure is interior owing to gatheringPart greasy filth, or groove filled out lid by greasy filth, the accuracy of measurement will be more inaccurate.
Utility model object
The utility model provides in advance should for railroad bridge that a kind of certainty of measurement is high, metering system is simpleThe measurement mechanism of power automatic Tensioning system presstressed reinforcing steel elongation.
Overall structure of the present utility model is:
For the measurement mechanism of railroad bridge prestressing force automatic Tensioning system presstressed reinforcing steel elongation, comprise thousandJin top, with the displacement transducer of jack piston interlock; Displacement transducer and jack piston are coaxial to be establishedPut and its stiff end and jack external stability, press by link plate elastic top the working end of displacement transducerIn jack piston outer surface.
Can it is evident that, the various structures such as displacement transducer can selection of casing formula, stay-supportedExisting displacement transducer is realized, and reading of displacement data is after displacement transducer output, to pass through analog-to-digital conversionThe existing mode such as unit exports on Displaying Meter, and because it belongs to prior art, applicant ties it at thisStructure and working method repeat no more.
Concrete structure of the present utility model is:
For realizing the axial location of displacement transducer, thus ensure to jack piston displacement measurement accurately,Preferred embodiment, described displacement transducer is by supporting member axial location, and supporting member comprisesOvercoat 4, spacer sleeve dress is matched with the inner sleeve in overcoat; Overcoat two ends are plugged in and are fixed on outside jack respectivelyIn the front holder and rear holder on surface, on the working end of displacement transducer and inner sleeve rear end cap, fixDisplacement transducer holder connects.
The stiff end of displacement transducer can adopt multiple existing fixed form with being connected of working end, itsIn comparatively common and preferred embodiment, the stiff end of described displacement transducer by nut with afterHolder connects, and the working end of displacement transducer is connected with sensor holder by screw.
For realizing the axial support to inner sleeve, and reduce the sliding friction between inner sleeve and front holder, excellentThe embodiment of choosing is to be provided with guide plate between described lining the outer surface of and front holder outer surface.
For the working end of effectively realizing displacement transducer is pressed on jack piston appearance by link plate elastic topFace, guarantees the synchronization action of displacement transducer and jack piston, and preferred technical implementation way is, positionBetween front holder outside displacement transducer and rear holder, be connected with extension spring, inner sleeve rear end arrangesRear shelves adopt seam location with the seam that overcoat front end is offered, between the rear shelves and the seam of overcoat of inner sleeveBe provided with stage clip.
The installation of extension spring and stage clip can adopt multiple existing techniques in realizing, its function should with meet link plate withThe elastic top on jack piston surface is pressed and the Self-resetting of displacement transducer working end is as the criterion. Wherein comparativelyPreferably technical implementation way is, described extension spring one end is connected with rear holder by the first spring base,The extension spring other end connects as one by the second spring base and link plate and inner sleeve rear end cap.
For realizing the stress equalization in above-mentioned course of action, guarantee the realization of action, preferred technology realizesMode is that described extension spring and stage clip are symmetrical arranged and displacement transducer 6 both sides.
The utility model is work like this:
In jack when work,, piston stretches out that (link plate is lived with jack under the effect of extension spring always to the rightThe state that keeps in touch of plug), drive link plate to move to the right, link plate drive displacement transducer holder, inMove together to the right cover and displacement transducer working end, and now extension spring is stretched, and stage clip is compressed. ThousandWhen jin top oil return, the External Force Acting of stage clip and extension spring is cancelled, and stage clip and extension spring are by elastic force separately freelyUphold and retraction, drive link plate and displacement transducer to bounce back together, complete a measuring process.
The obtained technological progress of the utility model is:
The utility model has overcome prior art while carrying out displacement measurement, the connecing of clamp and jack cannelureDiffer and the measure error that produces in contact, (being applicable to existing centre-hole jack) applied widely livesPlug does not need to process specially cannelure, and certainty of measurement is high, and measuring method is simple.
Brief description of the drawings
Accompanying drawing of the present utility model has:
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Reference numeral in accompanying drawing is as follows:
1, nut; 2, the first spring base; 3, extension spring; 4, overcoat; 5, stage clip; 6, displacement sensingDevice; 7, inner sleeve; 8, guide plate; 9, front holder; 10, the second spring base; 11, displacement transducerHolder; 12, jack; 13, screw; 14, rear holder; 15, link plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further, but not as to this practicalityNovel restriction, the content that protection domain of the present utility model is recorded with claim is as the criterion, any foundationThe equivalence techniques means that description has been done are replaced, and all do not depart from protection domain of the present utility model.
The overall technology of the present embodiment is constructed as shown, comprising jack 12, joins with jack pistonMoving displacement transducer 6; Displacement transducer 6 and the coaxial setting of jack piston and its stiff end and thousandJin top 12 external stabilities, the working end of displacement transducer 6 is pressed on jack by link plate 15 elastic top and livesSurface beyond the Great Wall.
Described displacement transducer 6 is by supporting member axial location, and supporting member comprises overcoat 4, spacer sleeveDress is matched with the inner sleeve 7 in overcoat 4; Overcoat 4 two ends be plugged in be respectively fixed on jack outer surface beforeIn holder 9 and rear holder 14, on the working end of displacement transducer 6 and inner sleeve 7 rear end caps, fixDisplacement transducer holder 11 connects.
The stiff end of described displacement transducer 6 is connected with rear holder 14 by nut 1, displacement sensingThe working end of device 6 is connected with sensor holder 11 by screw.
Between described inner sleeve 7 outer surfaces and front holder 9 outer surfaces, be provided with guide plate 8.
Between the front holder 9 in displacement transducer 6 outsides and rear holder 14, be connected with extension spring 3,The rear shelves that inner sleeve 7 rear ends arrange adopt seam to locate with the seam that overcoat 4 front ends are offered, in inner sleeve 7Between rear shelves and the seam of overcoat 4, be provided with stage clip 5.
Described extension spring 3 one end are connected with rear holder 14 by the first spring base 2, extension spring 3 other endsConnect as one by the second spring base 10 and link plate 15 and inner sleeve 7 rear end caps.
Described extension spring 3 and stage clip 5 are symmetrical arranged and displacement transducer 6 both sides.
Claims (7)
1. for the measurement mechanism of railroad bridge prestressing force automatic Tensioning system presstressed reinforcing steel elongation, compriseJack (12), with the displacement transducer (6) of jack piston interlock; It is characterized in that displacement transducer(6) with the coaxial setting of jack piston and its stiff end and jack (12) external stability, displacementThe working end of sensor (6) is pressed on jack piston outer surface by link plate (15) elastic top.
2. according to claim 1ly stretch for railroad bridge prestressing force automatic Tensioning system presstressed reinforcing steelThe measurement mechanism of long amount, is characterized in that described displacement transducer (6) is by supporting member axial location,Supporting member comprises overcoat (4), and spacer sleeve dress is matched with the inner sleeve (7) in overcoat (4); Overcoat (4)Two ends are plugged in respectively in the front holder (9) and rear holder (14) that is fixed on jack outer surface,Fixing displacement transducer holder (11) on the working end of displacement transducer (6) and inner sleeve (7) rear end capConnect.
3. according to claim 2ly stretch for railroad bridge prestressing force automatic Tensioning system presstressed reinforcing steelThe measurement mechanism of long amount, is characterized in that the stiff end of described displacement transducer (6) is by nut (1)Be connected with rear holder (14), the working end of displacement transducer (6) is by screw and sensor holder(11) connect.
4. according to claim 2ly stretch for railroad bridge prestressing force automatic Tensioning system presstressed reinforcing steelThe measurement mechanism of long amount, is characterized in that described inner sleeve (7) outer surface and front holder (9) appearanceBetween face, be provided with guide plate (8).
According to described in any one in claim 2-4 for railroad bridge prestressing force automatic Tensioning systemThe measurement mechanism of presstressed reinforcing steel elongation, is characterized in that being positioned at the front fixing of displacement transducer (6) outsideBetween seat (9) and rear holder (14), be connected with extension spring (3), the rear shelves that inner sleeve (7) rear end arrangesThe seam of offering with overcoat (4) front end adopts seam location, at rear shelves and the overcoat (4) of inner sleeve (7)Seam between be provided with stage clip (5).
6. according to claim 5ly stretch for railroad bridge prestressing force automatic Tensioning system presstressed reinforcing steelThe measurement mechanism of long amount, it is characterized in that described extension spring (3) one end by the first spring base (2) withRear holder (14) connects, and extension spring (3) other end is by the second spring base (10) and link plate (15)And inner sleeve (7) rear end cap connects as one.
7. according to claim 5ly stretch for railroad bridge prestressing force automatic Tensioning system presstressed reinforcing steelThe measurement mechanism of long amount, is characterized in that described extension spring (3) and stage clip (5) are symmetrical arranged and displacementSensor (6) both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521097878.8U CN205259620U (en) | 2015-12-24 | 2015-12-24 | Measurement device for be used for automatic push -pull system prestressing tendons elongation of opening of indisputable road bridge roof beam prestressing force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521097878.8U CN205259620U (en) | 2015-12-24 | 2015-12-24 | Measurement device for be used for automatic push -pull system prestressing tendons elongation of opening of indisputable road bridge roof beam prestressing force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205259620U true CN205259620U (en) | 2016-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521097878.8U Active CN205259620U (en) | 2015-12-24 | 2015-12-24 | Measurement device for be used for automatic push -pull system prestressing tendons elongation of opening of indisputable road bridge roof beam prestressing force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205259620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106044609A (en) * | 2016-06-08 | 2016-10-26 | 铁道第三勘察设计院集团有限公司 | Device for measuring retraction value of clamping piece and intelligent jack with same |
| CN108955971A (en) * | 2018-08-24 | 2018-12-07 | 云南航天工程物探检测股份有限公司 | Bridge effective prestress detector auxiliary device |
-
2015
- 2015-12-24 CN CN201521097878.8U patent/CN205259620U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106044609A (en) * | 2016-06-08 | 2016-10-26 | 铁道第三勘察设计院集团有限公司 | Device for measuring retraction value of clamping piece and intelligent jack with same |
| CN106044609B (en) * | 2016-06-08 | 2018-03-16 | 中国铁路设计集团有限公司 | Survey intermediate plate retraction value device and the intelligent jack with the device |
| CN108955971A (en) * | 2018-08-24 | 2018-12-07 | 云南航天工程物探检测股份有限公司 | Bridge effective prestress detector auxiliary device |
| CN108955971B (en) * | 2018-08-24 | 2024-02-20 | 云南航天工程物探检测股份有限公司 | Auxiliary device of bridge effective prestress detector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |