CN105384103A - Displacement sensor used for tensioning jack - Google Patents
Displacement sensor used for tensioning jack Download PDFInfo
- Publication number
- CN105384103A CN105384103A CN201511002811.6A CN201511002811A CN105384103A CN 105384103 A CN105384103 A CN 105384103A CN 201511002811 A CN201511002811 A CN 201511002811A CN 105384103 A CN105384103 A CN 105384103A
- Authority
- CN
- China
- Prior art keywords
- extension spring
- supporting plate
- main body
- displacement
- stretch
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/04—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
- G01B7/042—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention provides a displacement sensor used for a tensioning jack. The displacement sensor used for the tensioning jack comprises a connecting base, a displacement sensor body, an extension spring and a supporting plate, wherein the lower end of the connecting base is fixed to a cylinder of the tensioning jack, the extension spring is in an extension state, and the lower end of the supporting plate is arranged inside a cavity composed of a ring groove plate and the end of a piston rod. The displacement sensor body is arranged inside the extension spring along the axis of the extension spring, the front end of a shell of the displacement sensor body and the front end of the extension spring are fixed to the connecting base through a first connecting part, and the tail end of a measuring rod of the displacement sensor body and the tail end of the extension spring are fixed to the upper portion of the supporting plate through a second connecting part. The displacement sensor is accurate in measurement and capable of effectively protecting the sensor body.
Description
Technical field
The present invention relates to stretch-draw jack field, be specifically related to a kind of displacement pickup for stretch-draw jack.
Background technology
Hydraulic jack, also known as oil jack, is that a kind of plunger or hydraulic actuating cylinder of adopting lifts the jack of part as rigid top, is usually divided into General hydraulic jack and dedicated hydraulic jack two class.Dedicated hydraulic jack uses special tensioner, when making prestressed concrete member, applies tension force to deformed bar.
Refer to Fig. 7, in the working process of jack, piston rod drives supporting plate therewith to move reciprocatingly, and then drives displacement pickup to move reciprocatingly, and reaches the object measuring piston rod displacement.Can rotating in a circumferential direction along cylinder body when piston rod moves, therefore supporting plate can not be fixedly connected with piston rod, the two must relative sliding.When piston rod stretches out, apply outside power to supporting plate, make it outwards move together; When piston rod returns cylinder body, annular groove plate applies the power pointing to cylinder body (direction along returning cylinder body) to supporting plate, and then drives displacement pickup to move by supporting plate.To sum up, supporting plate and piston rod need relative sliding, supporting plate and must have gap between piston rod and annular groove plate, otherwise can hinder the motion of piston rod, affect testing result.Simultaneously, because supporting plate is connected with displacement pickup, therefore namely its displacement represents the displacement of displacement pickup, if and supporting plate and leave gap between piston rod and annular groove plate, then piston rod is return in the process of cylinder body, and supporting plate and annular groove plate are close to, and are not close to piston rod, accurately can not reflect the displacement of piston rod, cause testing result inaccurate.In addition, the displacement pickup main body of traditional stretch-draw jack is all directly outside exposed, and do not have fender guard, sensor main body is easily damaged.
Therefore this area needs a kind of displacement pickup measured accurately, can protect sensor main body.
Summary of the invention
For overcoming the deficiency of displacement pickup in prior art, the invention provides the displacement pickup for stretch-draw jack a kind ofly measuring accurately, can protect sensor main body, convenient for maintaining or replacing.Concrete scheme is as follows:
For a displacement pickup for stretch-draw jack, comprise lower end and be fixed on Connection Block on the cylinder body of stretch-draw jack, displacement pickup main body, the extension spring being in extended state and lower end and be arranged on supporting plate in the cavity that is made up of annular groove plate and piston rod end;
Institute's displacement sensors main body is provided at its inner portion along the axis of described extension spring, the front end of the housing of institute's displacement sensors main body and the front end of described extension spring are fixed on described Connection Block by the first attaching parts, and the end of the measuring staff of institute's displacement sensors main body and the end of described extension spring are fixed on the top of described supporting plate by the second attaching parts.
According to a preferred embodiment of the present invention, described Connection Block is provided with and arranges and all stepped the first through hole in two ends along described extension spring axis direction; The upper end of described supporting plate is provided with the second through hole arranged along described extension spring axis direction;
Described first attaching parts comprises the first end cap matched with described first through-hole structure, and described first end covers and is provided with fixing described extension spring front end and be oppositely arranged two spring eyes;
Described second attaching parts comprises the second end cap matched with described second through-hole structure, described second end cap is provided with fixing described extension spring end and be oppositely arranged two spring eyes, and the central axis of four described spring eyes is all arranged perpendicular to described extension spring axis direction.
According to a preferred embodiment of the present invention, also comprise the fender guard for the protection of institute's displacement sensors main body, described fender guard comprises front end and is fixed on outside protective pipe on described Connection Block and its front end and is movably arranged in described outside protective pipe and end is fixed on the interior protective tube on the upper end of described second attaching parts or supporting plate, and the external diameter of described interior protective tube is identical with the internal diameter of described outside protective pipe; Institute's displacement sensors main body is arranged in the cavity of described outside protective pipe and described interior protective tube formation;
Or; described fender guard is along the telescopic protective case of described extension spring axis direction; the front end of described protective case is fixed on described Connection Block, and its end is fixed on the upper end of described second attaching parts or supporting plate, and institute's displacement sensors main body is arranged in described protective case.
According to a preferred embodiment of the present invention, described outside protective pipe, described interior protective tube and described protective case are transparent material.
According to a preferred embodiment of the present invention, the outside face of described interior protective tube and described outside protective pipe and inside face are equipped with wearing layer.
According to a preferred embodiment of the present invention, described supporting plate is rectangular plate, and its thickness along described extension spring axis direction is 3mm ~ 7mm.
Technical scheme provided by the invention has following beneficial effect:
1, the supporting plate of the displacement pickup of traditional stretch-draw jack when piston rod stretches out cylinder body and piston rod end be close to; When returning cylinder body and annular groove plate be close to, can not be close to piston rod, make measurement when returning cylinder body inaccurate, extension spring set up by the displacement pickup that the technical program provides, supporting plate is in piston rod all the time under the effect of extension spring and is close to state, also be still close to even if piston rod rotates, therefore accurately can reflect the displacement (the stretch-draw amount of the workpiece that is namely stretched) of piston rod, make result of a measurement accurate.
2, the displacement pickup main body of traditional stretch-draw jack is all directly outside exposed; there is no fender guard; sensor main body is easily damaged; the technical program is with the fender guard comprising outside protective pipe and interior protective tube; outside protective pipe and interior protective tube can relative slidings, and the two can play a good protection in displacement pickup main body and extension spring being wrapped in completely; not fragile, increase the service life.Fender guard also can be coated extension spring and displacement pickup main body, and along the protective case that extension spring axis stretches, it can play same safeguard bit displacement sensor main body and the effect of extension spring.
3, the first end cap and described second end cap are respectively provided with two, totally 4 spring eyes for fixing extension spring two ends; compare the mode that only fixing extension spring is middle; extension spring can be made stressed more even; protection extension spring; also can reduce the probability that spring rotates simultaneously, make measurement more accurate.
4, outside protective pipe and interior protective tube, or protective case is transparent material, can observe the service condition of displacement pickup main body and extension spring easily, can on-call maintenance or replacing when displacement pickup main body or extension spring break down.
5, outside protective pipe inside face and interior protective tube inside face are equipped with wearing layer, and outside protective pipe and interior protective tube can be made in the process of relative motion to reduce degree of wear, increase service life.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to accompanying drawings, the present invention is further detailed explanation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing described below is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of the displacement pickup for stretch-draw jack provided by the invention;
Fig. 2 is the front view of the first end cap in Fig. 1;
Fig. 3 is the left view of the first end cap in Fig. 2;
Fig. 4 is the front view of the second end cap in Fig. 1;
Fig. 5 is the left view of the second end cap in Fig. 4;
Structural representation when Fig. 6 is the displacement pickup use in Fig. 1;
Structural representation when Fig. 7 is of the prior art use;
In figure: 1, Connection Block, the 11, first through hole, 2, displacement pickup main body, 3, outside protective pipe, 4, interior protective tube, 5, cavity, the 6, first attaching parts, the 61, first end cap, 7, extension spring, 8, the second attaching parts, the 81, second end cap, 9, supporting plate, the 91, second through hole;
01, stretch-draw jack, 011, piston rod, 012, annular groove plate, 013, cylinder body.
Detailed description of the invention
Below in conjunction with accompanying drawing of the present invention, carry out clear, complete description to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.
Refer to Fig. 1 and Fig. 6, for a displacement pickup for stretch-draw jack, comprise lower end and be fixed on Connection Block 1 on the cylinder body 013 of stretch-draw jack 01, displacement pickup main body 2, the extension spring 7 being in extended state and lower end and be arranged on supporting plate 9 in the cavity 5 that is made up of annular groove plate 012 and piston rod 011 end.Institute's displacement sensors main body 2 is provided at its inner portion along the axis of described extension spring 7, the front end of the housing of institute's displacement sensors main body 2 and the front end of described extension spring 7 are fixed on described Connection Block 1 by the first attaching parts 6, and the end of the measuring staff of institute's displacement sensors main body 2 and the end of described extension spring 7 are fixed on the top of described supporting plate 9 by the second attaching parts 8.
Further, described Connection Block 1 is provided with and arranges and all stepped the first through hole 11 in two ends along described extension spring 7 axis direction; The upper end of described supporting plate 9 is provided with the second through hole 91 arranged along described extension spring 7 axis direction.
Please continue to refer to Fig. 2 ~ Fig. 5, described first attaching parts 6 comprises the first end cap 61 matched with described first through hole 11 structure, and described first end cap 61 is provided with fixing described extension spring 7 front end and be oppositely arranged two spring eyes.
Described second attaching parts 8 comprises the second end cap 81 matched with described second through hole 91 structure, described second end cap 81 is provided with fixing described extension spring 7 end and be oppositely arranged two spring eyes, and the central axis of four described spring eyes is all arranged perpendicular to described extension spring 7 axis direction.
Further, also comprise the fender guard for the protection of institute's displacement sensors main body 2, described fender guard comprises front end and is fixed on outside protective pipe 3 on described Connection Block 1 and its front end and is movably arranged in described outside protective pipe 3 and end is fixed on the interior protective tube 4 on the upper end of described second attaching parts 8 or supporting plate 9, and the external diameter of described interior protective tube 4 is identical with the internal diameter of described outside protective pipe 3; Institute's displacement sensors main body 2 is arranged in the cavity of described outside protective pipe 3 and the formation of described interior protective tube 4;
Or; described fender guard is along the telescopic protective case of described extension spring 7 axis direction; the front end of described protective case is fixed on described Connection Block 1, and its end is fixed on the upper end of described second attaching parts 8 or supporting plate 9, and institute's displacement sensors main body 2 is arranged in described protective case.
Further, described outside protective pipe 3, described interior protective tube 4 and described protective case are transparent material.
Further, the outside face of described interior protective tube 4 and described outside protective pipe 3 and inside face are equipped with wearing layer, to increase service life.
Further, described supporting plate 9 is rectangular plate, and its thickness along described extension spring 7 axis direction is 3mm ~ 7mm.
The principle of work of the technical program is as follows:
Measuring staff one end (being right-hand member in figure) of institute's displacement sensors main body 2 can be moved with the movement of described supporting plate 9, under the effect of described extension spring 7, described supporting plate 9 is in described piston rod 011 is all the time close to state, therefore the displacement of described supporting plate 9 is the displacement of displacement pickup, described annular groove plate 012 plays a supportive role to described supporting plate 9.
The foregoing is only embodiments of the invention; not thereby scope of patent protection of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; directly or indirectly be used in the technical field that other is relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. the displacement pickup for stretch-draw jack, it is characterized in that, comprise lower end and be fixed on Connection Block (1) on the cylinder body (013) of stretch-draw jack (01), displacement pickup main body (2), the extension spring (7) being in extended state and lower end and be arranged on supporting plate (9) in the cavity (5) that is made up of annular groove plate (012) and piston rod (011) end;
Institute's displacement sensors main body (2) is provided at its inner portion along the axis of described extension spring (7), the front end of the housing of institute's displacement sensors main body (2) and the front end of described extension spring (7) are fixed on described Connection Block (1) by the first attaching parts (6), and the end of the measuring staff of institute's displacement sensors main body (2) and the end of described extension spring (7) are fixed on the top of described supporting plate (9) by the second attaching parts (8).
2. the displacement pickup for stretch-draw jack according to claim 1, it is characterized in that, described Connection Block (1) is provided with and arranges and all stepped the first through hole (11) in two ends along described extension spring (7) axis direction; The upper end of described supporting plate (9) is provided with the second through hole (91) arranged along described extension spring (7) axis direction;
Described first attaching parts (6) comprises the first end cap (61) matched with described first through hole (11) structure, and described first end cap (61) is provided with fixing described extension spring (7) front end and be oppositely arranged two spring eyes; Described second attaching parts (8) comprises the second end cap (81) matched with described second through hole (91) structure, described second end cap (81) is provided with fixing described extension spring (7) end and be oppositely arranged two spring eyes, and the central axis of four described spring eyes is all arranged perpendicular to described extension spring (7) axis direction.
3. the displacement pickup for stretch-draw jack according to any one of claim 1 ~ 2, it is characterized in that, also comprise the fender guard for the protection of institute's displacement sensors main body (2), described fender guard comprises front end and is fixed on outside protective pipe (3) on described Connection Block (1) and its front end and is movably arranged in described outside protective pipe (3) and end is fixed on the interior protective tube (4) on the upper end of described second attaching parts (8) or supporting plate (9), the external diameter of described interior protective tube (4) is identical with the internal diameter of described outside protective pipe (3), institute's displacement sensors main body (2) is arranged in the cavity that described outside protective pipe (3) and described interior protective tube (4) formed,
Or; described fender guard is along the telescopic protective case of described extension spring (7) axis direction; the front end of described protective case is fixed on described Connection Block (1); its end is fixed on the upper end of described second attaching parts (8) or supporting plate (9), and institute's displacement sensors main body (2) is arranged in described protective case.
4. the displacement pickup for stretch-draw jack according to claim 3, is characterized in that, described outside protective pipe (3), described interior protective tube (4) and described protective case are transparent material.
5. the displacement pickup for stretch-draw jack according to claim 3, is characterized in that, outside face and the inside face of described interior protective tube (4) and described outside protective pipe (3) are equipped with wearing layer.
6. the displacement pickup for stretch-draw jack according to claim 3, is characterized in that, described supporting plate (9) is rectangular plate, and its thickness along described extension spring (7) axis direction is 3mm ~ 7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002811.6A CN105384103A (en) | 2015-12-28 | 2015-12-28 | Displacement sensor used for tensioning jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002811.6A CN105384103A (en) | 2015-12-28 | 2015-12-28 | Displacement sensor used for tensioning jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105384103A true CN105384103A (en) | 2016-03-09 |
Family
ID=55416950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511002811.6A Pending CN105384103A (en) | 2015-12-28 | 2015-12-28 | Displacement sensor used for tensioning jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105384103A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952714A (en) * | 2016-07-12 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | Externally arranged displacement sensor for dynamic testing of hydraulic cylinder |
| CN108168422A (en) * | 2017-12-28 | 2018-06-15 | 华侨大学 | A kind of diaphram wall testing apparatus for verticality and its detection method |
| CN110877869A (en) * | 2018-09-05 | 2020-03-13 | 河北高达预应力科技有限公司 | Jack displacement sensor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63266309A (en) * | 1987-04-24 | 1988-11-02 | Hitachi Cable Ltd | Displacement sensor |
| CN102853735A (en) * | 2012-08-29 | 2013-01-02 | 中铁十局集团有限公司 | Clamping sheet exposing value measuring device of front clamping type jack |
| CN203392788U (en) * | 2013-07-01 | 2014-01-15 | 柳州黔桥工程材料有限公司 | Intelligent jack with automatic tool anchor |
| CN203732051U (en) * | 2013-12-27 | 2014-07-23 | 合肥普林斯交通设备有限公司 | Elongation amount measuring device for tensioning jack |
| CN204064273U (en) * | 2014-08-14 | 2014-12-31 | 河北高达电子科技有限公司 | Bridge prestress displacement detector |
| CN104501689A (en) * | 2014-12-01 | 2015-04-08 | 柳州市桥厦工程管材有限公司 | Displacement ruler protection device with guidance function |
| CN204778596U (en) * | 2015-05-14 | 2015-11-18 | 柳州泰姆预应力机械有限公司 | Card formula jack before intelligence convenient to construction |
| CN205204739U (en) * | 2015-12-28 | 2016-05-04 | 湖南联智桥隧技术有限公司 | A displacement sensor for stressing jack |
-
2015
- 2015-12-28 CN CN201511002811.6A patent/CN105384103A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63266309A (en) * | 1987-04-24 | 1988-11-02 | Hitachi Cable Ltd | Displacement sensor |
| CN102853735A (en) * | 2012-08-29 | 2013-01-02 | 中铁十局集团有限公司 | Clamping sheet exposing value measuring device of front clamping type jack |
| CN203392788U (en) * | 2013-07-01 | 2014-01-15 | 柳州黔桥工程材料有限公司 | Intelligent jack with automatic tool anchor |
| CN203732051U (en) * | 2013-12-27 | 2014-07-23 | 合肥普林斯交通设备有限公司 | Elongation amount measuring device for tensioning jack |
| CN204064273U (en) * | 2014-08-14 | 2014-12-31 | 河北高达电子科技有限公司 | Bridge prestress displacement detector |
| CN104501689A (en) * | 2014-12-01 | 2015-04-08 | 柳州市桥厦工程管材有限公司 | Displacement ruler protection device with guidance function |
| CN204778596U (en) * | 2015-05-14 | 2015-11-18 | 柳州泰姆预应力机械有限公司 | Card formula jack before intelligence convenient to construction |
| CN205204739U (en) * | 2015-12-28 | 2016-05-04 | 湖南联智桥隧技术有限公司 | A displacement sensor for stressing jack |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952714A (en) * | 2016-07-12 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | Externally arranged displacement sensor for dynamic testing of hydraulic cylinder |
| CN108168422A (en) * | 2017-12-28 | 2018-06-15 | 华侨大学 | A kind of diaphram wall testing apparatus for verticality and its detection method |
| CN110877869A (en) * | 2018-09-05 | 2020-03-13 | 河北高达预应力科技有限公司 | Jack displacement sensor |
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Application publication date: 20160309 |