CN203224323U - Piezoelectric type tensioning force monitoring device - Google Patents
Piezoelectric type tensioning force monitoring device Download PDFInfo
- Publication number
- CN203224323U CN203224323U CN 201320246647 CN201320246647U CN203224323U CN 203224323 U CN203224323 U CN 203224323U CN 201320246647 CN201320246647 CN 201320246647 CN 201320246647 U CN201320246647 U CN 201320246647U CN 203224323 U CN203224323 U CN 203224323U
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- Prior art keywords
- anchor ring
- piezoelectric
- steel strand
- annulus
- strand wires
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Abstract
A piezoelectric type tensioning force monitoring device. A clamping piece is arranged outside one or each of three to five steel strands to be measured, the clamping piece is externally provided with an anchor ring, the anchor ring is externally provided with a circular ring, at least two piezoelectric sensors divide circumference into equal parts are arranged between the outer surfaces of the circular ring and the anchor ring, the piezoelectric sensors are connected with a computer through a data line and convert received pressure due to deformation of the anchor ring which is caused through the clamping piece by tension that the steel strand bears into an electrical signal to be output to the computer, and the computer makes a calculation according to a preset program and calculates the tensioning force of the steel strand. The piezoelectric type tensioning force monitoring device has the advantages of being good in stability, high in measurement accuracy, and capable of being used repeatedly, and can be used for monitoring the tensioning force of the steel strand in engineering construction of a prestressed concrete structure.
Description
Technical field
The utility model belongs to equipment or the device technique field of ergometry, is specifically related to the testing tool of ground tackle steel strand wires assembly.
Background technology
Prestressing technique is used very extensive in civil engineering work at present; when the prestressed reinforced concrete construction engineering construction; the overwhelming majority is that what to adopt is post stretching: namely build concrete members earlier; and reserving hole channel or bury sleeve pipe underground therein; after treating that concrete reaches desired strength; at least one or more steel strand wires are penetrated in the duct of reservation; be supported on the concrete component end with lifting jack; the stretch-draw steel strand wires; make member be subjected to the counter-force compression simultaneously; to be tensioned to the control pulling force; the size of control pulling force is measured indirectly by the oil pressure gauge on the tensioning equipment; namely use special ground tackle (most adopt be YJM type ground tackle) that steel strand wires are anchored on the concrete component; make the concrete acquisition and keep its compressive pre-stress, pressure injection grout in reserving hole channel is with the unlikely corrosion of protection steel strand wires; make steel strand wires and concrete binding become integral body, collaborative work.
After adopting YJM type ground tackle to be anchored in steel strand wires on the concrete component, whether the compressive pre-stress value that concrete obtains meets design requirement, this is the anchor force value decision by ground tackle, and the present feasible method that does not also have directly to measure ground tackle anchor force value in the engineering construction, what adopt is approximate value, thinks that namely the anchor force value of ground tackle is exactly the control value of thrust that the oil pressure gauge on the tensioning equipment provides.Because the factors such as slippage, interior contracting and anchor mouth friction loss of YJM type ground tackle presstressed reinforcing steel in the anchoring process, adopt this control value of thrust that error is obviously arranged, can cause member prestress less than design load when error is excessive, thereby stay hidden dangers in project (compressive pre-stress value accident less than normal often occurs in the engineering construction, member cracking etc. when causing the crossbeam camber less than normal, serious).In order to ensure construction quality, accurately obtain the size of anchor force, rationally estimation YJM type ground tackle in the anchoring process because the anchor force loss value that slippage, interior contracting and the anchor mouth friction loss etc. of presstressed reinforcing steel bring, someone accurately measures the anchor force value by setting pressure sensor between anchor plate and ground tackle, but this way can only adopt for research, can not be in engineering extensively promote, because one be that pressure transducer will occupy the space, will change the design of geometrical scale like this; The 2nd, pressure transducer can not be reused, thereby increases construction costs because every pressure transducer from hundreds of unit to thousands of units.The technical matters that need solve when therefore how accurately the stretching force of monitoring YJM type ground tackle steel strand wires is the prestressed reinforced concrete construction engineering construction in work progress.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the shortcoming of prior art, a kind of reasonable in design, easy for installation, good stability, measuring accuracy height are provided, can use repeatedly, and can not change the intrinsic piezoelectric type stretching force of structure monitoring device.
Solving the problems of the technologies described above the technical scheme that adopts is: every steel strand wires in tested 1 or 3～5 are outside equipped with intermediate plate, the outer setting of intermediate plate has anchor ring, anchor ring is outside equipped with annulus, at least be provided with the piezoelectric sensor of 2 circumference in equal parts between annulus and the anchor ring outside surface on the annulus, piezoelectric sensor links to each other with computing machine by data line.
Piezoelectric sensor of the present utility model is: be provided with sealing shroud in housing, be provided with piezoelectric ceramics block in the sealing shroud, the upper surface of piezoelectric ceramics block is provided with cushion block and lead, lower surface are provided with lower cushion block, between the upper end spring is installed in last cushion block and the housing.
Of the present utility modelly be arranged on piezoelectric ceramics block in the sealing shroud, go up cushion block, lower cushion block is right cylinder.
Sealing shroud of the present utility model is rubber sealing boot.
Because the utility model adopts at least 2 piezoelectric sensors are installed between annulus and anchor ring, the pulling force that piezoelectric sensor carries received steel strand wires causes that by intermediate plate pressure that the anchor ring distortion is subjected to converts electric signal to and outputs to computing machine, computing machine carries out computing according to the program of prior setting, the stretching force of output steel strand wires.Advantage such as the utlity model has good stability, measuring accuracy height, can use repeatedly, when can be used for the prestressed reinforced concrete construction engineering construction, the stretching force of monitoring steel strand wires guarantees that the ground tackle anchor force meets design requirement.
Description of drawings
Fig. 1 is the front view of the utility model embodiment 1.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the A-A cut-open view of Fig. 2.
Fig. 4 is the structural representation of piezoelectric sensor 1 among Fig. 2.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Embodiment 1
In Fig. 1,2,3, the piezoelectric type stretching force monitoring device of present embodiment is made of piezoelectric sensor 1, intermediate plate 2, steel strand wires 3, annulus 4, anchor ring 5, computing machine 6 connections.
Fig. 4 has provided the structural representation of the piezoelectric sensor 1 of present embodiment.In Fig. 4, the piezoelectric sensor 1 of present embodiment is made of housing 1-1, spring 1-2, lead 1-3, last cushion block 1-4, sealing shroud 1-5, piezoelectric ceramics block 1-6, lower cushion block 1-7 connection.
Sealing shroud 1-5 is installed in housing 1-1, and sealing shroud 1-5 is rubber sealing boot.Piezoelectric ceramics block 1-6 is installed in the sealing shroud 1-5, when being used for being under pressure, piezoelectric ceramics block 1-6 produces electric signal, the upper surface of piezoelectric ceramics block 1-6 sticks with glue and is connected to cushion block 1-4, the upper surface of piezoelectric ceramics block 1-6 is welded with lead 1-3, piezoelectric ceramics block 1-6 will receive the pulling force that invar twisted wire 3 bears, steel strand wires 3 cause that by intermediate plate 2 pressure that anchor ring 5 distortion are subjected to converts electric signal to by lead 1-3 output, the lower surface of piezoelectric ceramics block 1-6 sticks with glue and is connected to lower cushion block 1-7, piezoelectric ceramics block 1-6, last cushion block 1-4, the geometric configuration of lower cushion block 1-7 is right cylinder.Between the upper end spring 1-2 is installed in last cushion block 1-4 and the housing 1-1, spring 1-2 is used for returning to when piezoelectric ceramics block 1-6 does not stress the origin-location.
In the present embodiment, outside anchor ring 5, be set with annulus 4, on annulus 4, be installed with 3 piezoelectric sensors 1 by screw thread is uniform between annulus 4 and anchor ring 5 outside surfaces, angle between the center line of 3 piezoelectric sensors 1 is 120 °, the structure of piezoelectric sensor 1 is identical with embodiment 1,3 piezoelectric sensors 1 will receive pulling force that invar twisted wire 3 bears, steel strand wires 3 and cause that by intermediate plate 2 pressure that anchor ring 5 distortion are subjected to converts electric signal to and outputs to computing machine 6, computing machine 6 carries out computing according to the program of prior setting, calculates the stretching force of steel strand wires 3.The connecting relation of other parts and parts is identical with embodiment 1.
In the present embodiment, outside anchor ring 5, be set with annulus 4, on annulus 4, be installed with 4 piezoelectric sensors 1 by screw thread is uniform between annulus 4 and anchor ring 5 outside surfaces, angle between the center line of 4 piezoelectric sensors 1 is 90 °, the structure of piezoelectric sensor 1 is identical with embodiment 1,4 piezoelectric sensors 1 will receive pulling force that invar twisted wire 3 bears, steel strand wires 3 and cause that by intermediate plate 2 pressure that anchor ring 5 distortion are subjected to converts electric signal to and outputs to computing machine 6, computing machine 6 carries out computing according to the program of prior setting, calculates the stretching force of steel strand wires 3.The connecting relation of other parts and parts is identical with embodiment 1.
In the present embodiment, outside anchor ring 5, be set with annulus 4, on annulus 4, be installed with 6 piezoelectric sensors 1 by screw thread is uniform between annulus 4 and anchor ring 5 outside surfaces, angle between the center line of 6 piezoelectric sensors 1 is 60 °, the structure of piezoelectric sensor 1 is identical with embodiment 1,6 piezoelectric sensors 1 will receive pulling force that invar twisted wire 3 bears, steel strand wires 3 and cause that by intermediate plate 2 pressure that anchor ring 5 distortion are subjected to converts electric signal to and outputs to computing machine 6, computing machine 6 carries out computing according to the program of prior setting, calculates the stretching force of steel strand wires 3.The connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～4, outside the every steel strand wires 3 of 3 steel strand wires 3, intermediate plate 2 is installed, the periphery of 3 groups of intermediate plates 2 is equipped with anchor ring 5, anchor ring 5 axially be processed with 3 bellmouths, the cone angle of bellmouth is identical with embodiment 1, the every outer intermediate plate 2 of steel strand wires is installed in 1 bellmouth, the anchor ring 5 outer annulus 4 that are set with, on annulus 4, be installed with 3 piezoelectric sensors 1 by screw thread is uniform between annulus 4 and anchor ring 5 outside surfaces, 3 piezoelectric sensors 1 will receive the pulling force that invar twisted wire 3 bears, steel strand wires 3 cause that by intermediate plate 2 pressure that anchor ring 5 distortion is subjected to converts electric signal to and outputs to computing machine 6, computing machine 6 carries out computing according to the program of prior setting, calculates the stretching force of steel strand wires 3.The connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～4, outside the every steel strand wires 3 of 4 steel strand wires 3, intermediate plate 2 is installed, the periphery of 4 groups of intermediate plates 2 is equipped with anchor ring 5, anchor ring 5 axially be processed with 4 bellmouths, the cone angle of bellmouth is identical with embodiment 1, the every outer intermediate plate 2 of steel strand wires is installed in 1 bellmouth, the anchor ring 5 outer annulus 4 that are set with, on annulus 4, be installed with 4 piezoelectric sensors 1 by screw thread is uniform between annulus 4 and anchor ring 5 outside surfaces, 4 piezoelectric sensors 1 will receive the pulling force that invar twisted wire 3 bears, steel strand wires 3 cause that by intermediate plate 2 pressure that anchor ring 5 distortion is subjected to converts electric signal to and outputs to computing machine 6, computing machine 6 carries out computing according to the program of prior setting, calculates the stretching force of steel strand wires 3.The connecting relation of other parts and parts is identical with embodiment 1.
Embodiment 7
In above embodiment 1～4, outside every steel strand wires of 5 steel strand wires 3, intermediate plate 2 is installed, the periphery of 5 groups of intermediate plates 2 is equipped with anchor ring 5, anchor ring 5 axially be processed with 5 bellmouths, the cone angle of bellmouth is identical with embodiment 1, the every outer intermediate plate 2 of steel strand wires is installed in 1 bellmouth, the anchor ring 5 outer annulus 4 that are set with, on annulus 4, be installed with 5 piezoelectric sensors 1 by screw thread is uniform between annulus 4 and anchor ring 5 outside surfaces, 5 piezoelectric sensors 1 will receive the pulling force that invar twisted wire 3 bears, steel strand wires 3 cause that by intermediate plate 2 pressure that anchor ring 5 distortion is subjected to converts electric signal to and outputs to computing machine 6, computing machine 6 carries out computing according to the program of prior setting, calculates the stretching force of steel strand wires 3.The connecting relation of other parts and parts is identical with embodiment 1.
Also can design the piezoelectric type stretching force monitoring device of another concrete structure according to above-mentioned principle, but all within protection domain of the present utility model.
Principle of work of the present utility model is as follows:
At the scene in the prestressing force pulling force work progress, along with steel strand wires 3 stretching forces increase, steel strand wires 3 make the distortion of anchor ring 5 also along with increase by intermediate plate 2, between annulus 4 and anchor ring 5, piezoelectric sensor 1 is installed, piezoelectric sensor 1 produces electric signal because the distortion of anchor ring 5 is under pressure and outputs to computing machine 6, computing machine 6 carries out computing according to the program of prior setting, calculates the stretching force of steel strand wires 3.
Claims (4)
1. piezoelectric type stretching force monitoring device, every steel strand wires (3) in tested 1 or 3～5 are outside equipped with intermediate plate (2), the outer setting of intermediate plate (2) has anchor ring (5), it is characterized in that: anchor ring (5) is outside equipped with annulus (4), at least be provided with the piezoelectric sensor (1) of 2 circumference in equal parts between annulus (4) and anchor ring (5) outside surface on the annulus (4), piezoelectric sensor (1) links to each other with computing machine (6) by data line.
2. piezoelectric type stretching force monitoring device according to claim 1, it is characterized in that described piezoelectric sensor (1) is: in housing (1-1), be provided with sealing shroud (1-5), be provided with piezoelectric ceramics block (1-6) in the sealing shroud (1-5), the upper surface of piezoelectric ceramics block (1-6) is provided with cushion block (1-4) and lead (1-3), lower surface are provided with lower cushion block (1-7), between the upper end spring (1-2) is installed in last cushion block (1-4) and the housing (1-1).
3. piezoelectric type stretching force monitoring device according to claim 2 is characterized in that: describedly be arranged on piezoelectric ceramics block (1-6) in the sealing shroud (1-5), go up cushion block (1-4), lower cushion block (1-7) is right cylinder.
4. according to claim 2 or 3 described piezoelectric type stretching force monitoring devices, it is characterized in that: described sealing shroud (1-5) is rubber sealing boot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246647 CN203224323U (en) | 2013-05-08 | 2013-05-08 | Piezoelectric type tensioning force monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246647 CN203224323U (en) | 2013-05-08 | 2013-05-08 | Piezoelectric type tensioning force monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224323U true CN203224323U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320246647 Withdrawn - After Issue CN203224323U (en) | 2013-05-08 | 2013-05-08 | Piezoelectric type tensioning force monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203224323U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207041A (en) * | 2013-05-08 | 2013-07-17 | 长安大学 | Piezoelectric tension monitoring device |
| CN105588677A (en) * | 2014-11-14 | 2016-05-18 | 北京弗圣威尔科技有限公司 | Mechanism for detecting relaxed and tension states of wire |
| GB2549142A (en) * | 2016-04-08 | 2017-10-11 | Hayat Civil Eng Ltd | A meter for mounting on a component of a temporary construction structure |
-
2013
- 2013-05-08 CN CN 201320246647 patent/CN203224323U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207041A (en) * | 2013-05-08 | 2013-07-17 | 长安大学 | Piezoelectric tension monitoring device |
| CN103207041B (en) * | 2013-05-08 | 2015-06-10 | 长安大学 | Piezoelectric tension monitoring device |
| CN105588677A (en) * | 2014-11-14 | 2016-05-18 | 北京弗圣威尔科技有限公司 | Mechanism for detecting relaxed and tension states of wire |
| CN105588677B (en) * | 2014-11-14 | 2018-06-05 | 北京弗圣威尔科技有限公司 | The relaxation of detection line and the mechanism of tension |
| GB2549142A (en) * | 2016-04-08 | 2017-10-11 | Hayat Civil Eng Ltd | A meter for mounting on a component of a temporary construction structure |
| GB2549142B (en) * | 2016-04-08 | 2020-12-16 | Trent Energy Ltd | A meter for mounting on a component of a temporary construction structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20150610 |
|
| RGAV | Abandon patent right to avoid regrant |