CN1212464C - Automatic prestressing extension devices - Google Patents
Automatic prestressing extension devices Download PDFInfo
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- CN1212464C CN1212464C CN 03111812 CN03111812A CN1212464C CN 1212464 C CN1212464 C CN 1212464C CN 03111812 CN03111812 CN 03111812 CN 03111812 A CN03111812 A CN 03111812A CN 1212464 C CN1212464 C CN 1212464C
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Abstract
The present invention relates to a full automatic prestress tensioning device which comprises a tensioning jack driven by an oil pump, a force sensor, a displacement sensor and a control assembly of a tensioning device, wherein an oil supplying channel of the oil pump is provided with an electromagnetic valve which is controlled by the control assembly of the tensioning device. Carrying out the tensioning construction by the full automatic prestress tensioning device of the present invention can ensure that the tensioning precision is at a range of 1%. Compared with traditional tensioning tools (controlling the tensioning by jacks, oil pumps and pressure gauges) and the existing tensioning devices, the present invention largely improves the tensioning precision of the prestress. The present invention can perfectly ensure the design idea. The present invention makes the whole tensioning process automatized and digitized, and realizes the remote communication and control of the prestress construction. The automatic printing record of tensioning force and tendon extending value can replace the manual record. The present invention largely reduces the manual participation and improves the precision and the reliability coefficient of a receiving report of the construction. The tensioning device is used for full automatic control of the tensioning process.
Description
Technical field
The present invention relates in the civil engineering prestressed member be carried out the device of autofrettage, be specially a kind of full-automatic pre-stress stretching device.
Background technology
The most traditional prestressing force pull system that adopts when at present in field of civil engineering prestressed member being carried out stretch-draw is to drive jack by oil pump to carry out stretch-draw, by pressure fuel pump meter reading control stretching force, manual measurement control tension of prestressed tendon stretch value, have following defective: 1) stretching force and manometric calibrated error and pressure gauge reading error are bigger; 2) the pressure gauge reading instability is difficult to pin-point reading, and rate of reading is slow, need be converted by pressure gauge reading and just can know the size of stretching force, can not form the intuitive concept of stretching force, to control stretch-draw inconvenience; 3) the pressurized control operate miss is big, and resolution ratio is low, is difficult to accurately control stretching force; 4) manually measure the tension of prestressed tendon stretch value with survey tool and also exist error in reading big, measuring process is slow, and feedback information is inaccurate; 5) stretch-draw jack, oil pump and manometric demarcation desired times are many, and calibration result is difficult for keeping, and demarcates required expense height, and pressure meter is fragile; 6) construction note is manually filled in, and is difficult to guarantee authenticity.In a word, efficient is low, precision is low, can't realize the dual control of tension of prestressed tendon stretch value and control stress for prestressing automatically.Control stress for prestressing and the control of tension of prestressed tendon stretch value are inaccurate to be to cause that prestressed structure cracks, sometimes be to cause prestressed structure often to produce excessive deformation so that the main cause that causes structural failure or scrap, the major accident that has presstressed reinforcing steel to break in the time of also occurs, even the deadly accident of hurting sb.'s feelings occurs.
Have in the prior art and have certain tensioning equipment of presentation control function automatically, it as the patent No. 00262315.3 patented technology, it comprises the power sensor, displacement transducer and demonstration controller, the stretching force signal of power sensor senses and the displacement signal of displacement transducer perception (being the tension of prestressed tendon stretch value) are input in the demonstration controller, by show that controller shows the stretch value of stretching force and presstressed reinforcing steel and controls under the corresponding software support, when stretching force that reaches setting and Extension Values of Prestress Reinforcements, device can be reported to the police, and manually stops pressurization.But above-mentioned tensioning equipment is open loop control in control, promptly pressurized operation still for manually carrying out, still exists the pressurized operation departure big, is difficult to accurately control the deficiency and the defective of stretching force; Simultaneously, make troubles also for the operation and the use of device.
Summary of the invention
It is big that the present invention solves the pressurized operation departure that existing pre-stress stretching device open loop control caused, and is difficult to accurately control the problem of stretching force, a kind of full-automatic pre-stress stretching device is provided, and is purpose with the hardware configuration that this device is provided only.
The present invention adopts following technical scheme to realize: full-automatic pre-stress stretching device, the control assembly that comprises the stretch-draw jack, power sensor, displacement transducer and the tensioning equipment that drive by oil pump, in the oil pump feed oil circuit, be provided with the electromagnetic valve that is subjected to the control of tensioning equipment control assembly, the power sensor by its external surface be fixed with foil gauge power sensing elastic component, be positioned at power sensing elastic component and have the top in presstressed reinforcing steel hole to constitute on it.The stretch-draw jack that oil pump drives among the present invention is employed traditional jack in the pre existing stress member stretching process; Displacement transducer is existing known products, on function, can be divided into differential type, signal emission-type etc., on structure, can be divided into contact, contactless, its installation, fixing, use etc. all belong to the technique known content, this the present invention is described, displacement transducer among the present invention is quoted in device, is used for changing the displacement (being the stretch value of presstressed reinforcing steel) of jack into signal of telecommunication input unit control assembly; Electromagnetic valve can adopt servo valve, digital valve etc.The hardware configuration of the control assembly of tensioning equipment adopts programmable logic controller PLC, programmable logic controller PLC is existing ripe known computer hardware configuration, device, its comprised substantially to signal particularly analog electrical signal from gathering, conversion, handle, storage, show, be driven into the required whole hardware configurations of process such as control output, even also comprise telecommunication and control structure and function, the present invention selects for use programmable logic controller PLC to make the device manufacturing simple as the hardware body of device control assembly, the power sensor, the analog electrical signal of displacement transducer output inserts the input end of analog signal of programmable logic controller, and the control end of the electromagnetic valve in the control output end of programmable logic controller PLC and the oil pump oil circuit joins.The stretching force value of setting and the stretch value of presstressed reinforcing steel are imported programmable logic controller by the man-machine interface of programmable logic controller, press the beginning key, tensioning equipment is started working, when the stretch value of control stress for prestressing or presstressed reinforcing steel reaches desirable value, control of control assembly and driving closed electromagnetic valve, device stops a position automatically, and stretching force and prestressing force stretch value store automatically, print record, replaces manual record.
The present invention has realized the closed-loop control of tensioning equipment, not only realized the Automatic Control of tensioning equipment, make whole prestressed stretch-draw process only need one-touch just can finish, thereby reduction labour intensity, improve safety, and whole stretching process has been broken away from the manual operation factor substantially, has improved the stretch-draw precision greatly.The present invention is the application in field of civil engineering of computer and control technology, have extremely strong field characteristics, in civil engineering autofrettage field compared with prior art, structurally owing to its closed loop controlling structure has outstanding substantive distinguishing features, on effect, be embodied in and all produce obvious improvement aspect automatic controlling level and the stretch-draw precision.
Full-automatic pre-stress stretching device of the present invention carries out tensioning construction can guarantee that the stretch-draw precision is in 1% scope, more traditional tensioner (jack, oil pump and pressure meter control stretch-draw) and existing tensioning equipment have improved the stretch-draw precision of prestressed structure greatly, can well guarantee design idea.Can make whole stretching process automation, digitlization, and can realize the telecommunication and the control of pre-stress construction, can overcome the number of drawbacks that adopts conventional tension construction technology, guarantee the prestressed structure construction fast, safety, accurately, require to carry out stretch-draw according to the control of corresponding standard rules.Can when reaching control stress for prestressing or exceed the control range of tension of prestressed tendon stretch value, stop stretch-draw automatically, the automatic print record of stretching force and Extension Values of Prestress Reinforcements can replace manual record, significantly reduce artificial participation and improved precision and the confidence level of delivery receiving acceptance report, utilized this tensioning equipment can carry out the Automatic Control of stretching process.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention;
Fig. 2 is a power sensor external structure schematic diagram;
Fig. 3 is a power sensor internal structural representation;
Fig. 4 is the johning knot composition of the foil gauge on the power sensor;
The schematic diagram of the programmable logic controller PLC that Fig. 5 promptly adopts for device control assembly;
The specific embodiment
Full-automatic pre-stress stretching device, the control assembly 9 that comprises the stretch-draw jack 5, power sensor 4, displacement transducer 6 and the tensioning equipment that drive by oil pump 7, in the oil pump feed oil circuit, be provided with the electromagnetic valve 8 that is subjected to the control of tensioning equipment control assembly, power sensor 4 by its external surface be fixed with foil gauge 11 power sensing elastic component 12, be positioned at power sensing elastic component and have the top 14 in presstressed reinforcing steel hole 13 to constitute on it.
Foil gauge fixing on the power sensor is eight, and eight foil gauges are bridge-type and connect.The inboard of the power sensing elastic component of power sensor and the end of top are respectively equipped with projection 16,17, are used to come directly towards the spacing of stroke.
Among Fig. 1,1 is presstressed reinforcing steel, in order to bear stretching force, is the control object; 2 is ground tackle, in order to the anchoring presstressed reinforcing steel, prevents the retraction of presstressed reinforcing steel; 3 is prestressed member, in the end of prestressed member single bundle or multi beam presstressed reinforcing steel is through in the ground tackle.
When this pre-stress stretching device used, power sensor 4 and jack 5 were arranged in the ground tackle back on the prestressed member respectively, and presstressed reinforcing steel 1 passes power sensor and jack respectively.For easy to use, power sensor 4 is fixed in the end of jack 5, and power sensor and jack are made one.
At first import the tension stress value of setting and the stretch value of presstressed reinforcing steel during use by the man-machine interface of controlling assembly (programmable logic controller), jack is when the stretching presstressed reinforcing steel, the power sensor is formed pressure, the sensing of exerting all one's strength flexible member produces distortion, the resistance value of the foil gauge on it is with the linear variation of pressure, and should ohmically voltage signal input control assembly, displacement transducer is also with the displacement input control assembly of the jack of perception, under the support of corresponding software, above-mentioned pressure and displacement signal are carried out the data processing, storage also shows synchronously, and the respective value of the stretch value of tension stress and presstressed reinforcing steel printed, when tension stress reaches in advance the setting value and the stretch value of presstressed reinforcing steel when reaching in advance setting range, the sound light alarming circuit of control assembly is reported to the police, and allows oil pump stop pressurization automatically.Jack in the power sensing elastic component of extruding force sensor to the top of sinciput power sensing element, make the intermediate plate of this top anchoring ground tackle 2, make ground tackle clamp presstressed reinforcing steel, prevent the retraction of presstressed reinforcing steel, the top of power sensor is played the anchorage effect of existing jack pair ground tackle fully.
Claims (4)
1, a kind of full-automatic pre-stress stretching device, the control assembly (9) that comprises the stretch-draw jack (5), power sensor (4), displacement transducer (6) and the tensioning equipment that drive by oil pump (7), in the oil pump feed oil circuit, be provided with the electromagnetic valve (8) that is subjected to the control of tensioning equipment control assembly, it is characterized by: power sensor (4) by its external surface be fixed with foil gauge (11) power sensing elastic component (12), be positioned at top (14) formation that power sensing elastic component has presstressed reinforcing steel hole (13) on it.
2, full-automatic pre-stress stretching device as claimed in claim 1 is characterized by: foil gauge fixing on the power sensor is eight, and eight foil gauges are bridge-type and connect.
3, full-automatic pre-stress stretching device as claimed in claim 1 or 2 is characterized by: the inboard of the power sensing elastic component of power sensor and the end of top are respectively equipped with projection (16,17).
4, as claim 1,2 described full-automatic pre-stress stretching devices, it is characterized by: power sensor (4) is fixed in the end of jack (5), and power sensor and jack are made one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111812 CN1212464C (en) | 2003-01-09 | 2003-01-09 | Automatic prestressing extension devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111812 CN1212464C (en) | 2003-01-09 | 2003-01-09 | Automatic prestressing extension devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1424476A CN1424476A (en) | 2003-06-18 |
| CN1212464C true CN1212464C (en) | 2005-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03111812 Expired - Fee Related CN1212464C (en) | 2003-01-09 | 2003-01-09 | Automatic prestressing extension devices |
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| Country | Link |
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| CN (1) | CN1212464C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065740A (en) * | 2017-02-15 | 2017-08-18 | 东北大学 | A kind of pre-stressed grinding hardens loading method and device |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES1057875Y (en) * | 2004-06-18 | 2005-01-16 | Pellicer Carlos F | TENSOR INSTALLATION OF THE ARMORS OF ARCHITECTURAL ELEMENTS PRETENSED. |
| CN102031874B (en) * | 2010-11-24 | 2012-05-30 | 湖南联智桥隧技术有限公司 | Intelligent type synchronous prestress tensioning system |
| CN102182146B (en) * | 2011-03-29 | 2012-07-04 | 中国铁道科学研究院铁道建筑研究所 | Prestress rib tensioning equipment, system and method and concrete continuous box girder |
| CN102444290B (en) * | 2011-09-16 | 2013-08-28 | 柳州市建桥预应力机械厂 | Automatic tension control system and method thereof |
| CN102941623A (en) * | 2012-11-19 | 2013-02-27 | 上海同禾土木工程科技有限公司 | Control method for tension parameters of box girder prestress tension system |
| CN103323283B (en) * | 2013-07-05 | 2015-12-23 | 中铁三局集团有限公司 | Bridge prestress automatic Tensioning device synchronization rating test method |
| CN103306488B (en) * | 2013-07-10 | 2015-10-21 | 耿晓梅 | The stretching machine that tension of prestressed tendon amount of recovery controls automatically |
| CN104965533A (en) * | 2015-04-27 | 2015-10-07 | 同济大学 | Pre-stress single-end single-jack intelligent tensioning control system |
| CN104876149A (en) * | 2015-05-04 | 2015-09-02 | 陈功 | Transverse-stress-induction jack |
| CN106079067B (en) * | 2016-08-08 | 2019-01-01 | 中国铁道科学研究院铁道建筑研究所 | A kind of tensioning equipment and its method of precast track plate |
| CN109682519A (en) * | 2018-12-29 | 2019-04-26 | 四川陆通检测科技有限公司 | Detecting and the system and method for stablizing effective prestress under intermediate plate displacement method test anchor |
-
2003
- 2003-01-09 CN CN 03111812 patent/CN1212464C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065740A (en) * | 2017-02-15 | 2017-08-18 | 东北大学 | A kind of pre-stressed grinding hardens loading method and device |
| CN107065740B (en) * | 2017-02-15 | 2019-05-28 | 东北大学 | A kind of pre-stressed grinding hardens loading method and device |
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| Publication number | Publication date |
|---|---|
| CN1424476A (en) | 2003-06-18 |
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