CN212865633U - Prestress tension control device - Google Patents
Prestress tension control device Download PDFInfo
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- CN212865633U CN212865633U CN202021585181.6U CN202021585181U CN212865633U CN 212865633 U CN212865633 U CN 212865633U CN 202021585181 U CN202021585181 U CN 202021585181U CN 212865633 U CN212865633 U CN 212865633U
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Abstract
The utility model relates to a prestressing force stretch-draw controlling means, include hydraulic pump and jack through advancing oil pipe and play oil pipe connection, the bottom of jack and the junction of advancing oil pipe and play oil pipe all imbed and are provided with pressure sensor, be equipped with displacement sensor on the jack, pressure sensor, displacement sensor and hydraulic pump all electric connection are to the slave controller, slave controller communication connection is to master controller, the hydraulic pump is including the oil pump that is connected with the motor, flow control valve, switching-over valve and pressure relief valve have been connected gradually on the oil pipe way between the oil-out of oil pump and the oil inlet of jack, the oil-out department of pressure relief valve is provided with and is connected pressure sensor with the slave controller; the utility model provides a controlling means can reduce the noise, let out leakage quantity and fluid temperature, improves the life-span and the reliability of system, has higher speed governing precision, energy-efficient.
Description
Technical Field
The utility model belongs to the technical field of civil engineering construction, concretely relates to prestressing force stretch-draw controlling means.
Background
The prestress tensioning is to apply tension in advance in the member, so that the applied prestress tensioning member bears the tensile stress, and further the applied prestress tensioning member generates certain deformation to deal with the load of the steel structure. Before the engineering structural member bears external load, the steel strand in the tension module is applied with pre-stress, so that the bending resistance and rigidity of the member are improved, the time for crack occurrence is delayed, and the durability of the member is improved.
In the construction of prestressed engineering, all the anchors of prestressed tendons need a tensioning device to apply prestress to the prestressed tendons, the tensioning device is used for operating a plurality of handles of each control valve manually, the elongation value of the prestressed tendons is measured manually and the pressure value of a pressure gauge is read, and the problems of complicated operation procedures, large reading error, slow measurement process, insufficient prestress tensioning value due to human factors, high misoperation rate, unreal record and the like exist.
Disclosure of Invention
The utility model aims at solving the problem that proposes among the background art, and provide prestressing force stretch-draw controlling means, can reduce the noise, let out leakage quantity and fluid temperature, improve the life-span and the reliability of system, have higher speed governing precision, energy-efficient.
The purpose of the utility model is realized like this:
prestressing force stretch-draw controlling means includes hydraulic pump and jack through advancing oil pipe and play oil union coupling, the bottom of jack and the junction that advances oil pipe and go out oil pipe all imbed and are provided with pressure sensor, be equipped with displacement sensor on the jack, the equal electric connection of pressure sensor, displacement sensor and hydraulic pump is from the controller, from controller communication connection to main control unit, the hydraulic pump is including the oil pump that is connected with the motor, flow control valve, switching-over valve and pressure relief valve have connected gradually on the oil pipe way between the oil-out of oil pump and the oil inlet of jack, the oil-out department of pressure relief valve is provided with and is connected pressure sensor from the controller.
Preferably, the motor is connected with a frequency converter, and the oil pump is connected to an oil tank.
Preferably, the jack is established two, the both ends of bridge are located through running through the inside steel strand wires symmetry of bridge to two jacks, one side embedding of jack is provided with the instrument anchor, one side fixed mounting of instrument anchor has the limiting plate.
Preferably, one side of the top end of the jack is fixedly provided with a force sensor, and the force sensor is electrically connected with the slave controller.
Preferably, the oil outlet of the oil pump is communicated with the oil inlet of the flow regulating valve and the second oil port of the reversing valve, the third oil port of the reversing valve is communicated with the oil inlet of the pressure relief valve, the oil outlet of the pressure relief valve is communicated with the oil inlet of the jack, the oil outlet of the jack is communicated with the fourth oil port of the reversing valve, the first oil port of the reversing valve and the oil outlet of the flow regulating valve are respectively communicated with the oil tank, and the flow regulating valve, the reversing valve and the pressure relief valve are respectively connected with the corresponding slave controller ports.
Preferably, the oil outlet of the flow regulating valve is connected with the oil tank through an overflow valve, and the overflow valve is connected with an oil pressure gauge for monitoring oil pressure.
Preferably, advance oil pipe and go out oil pipe and be the three-layer pipeline, the skin constitutes for HDPE high density polyethylene material, and the middle level is HDPE high density polyethylene material, and the inlayer is the EVOH material.
Preferably, the master controller and the slave controller are both provided with communication modules, and the communication modules comprise.
Preferably, the slave controller comprises a single chip microcomputer, a power supply module, a frequency converter driving module, an electromagnetic directional valve driving module, a pressure and displacement data acquisition module, a wireless communication module and a display module, and the single chip microcomputer adopts an STC12C5A60S2 enhanced single chip microcomputer.
Preferably, the main controller comprises a microprocessor, a system power module, a storage module, a USB interface module and a wireless communication module, and the microprocessor adopts an STC12C5a60S2 enhanced single chip microcomputer.
Preferably, the wireless communication module comprises a GPRS wireless network communication module and a routing module, and the master controller and the slave controller both adopt PID control strategies.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model provides a prestressing force stretch-draw controlling means, carry out the loading in-process at hydraulic system, the electromagnetic directional valve is in the left position, the size of oil pump output flow is adjusted by converter control AC motor rotational speed simultaneously, thereby realize the speed governing, the electro-magnet of electromagnetic directional valve loses the electricity, be in the meso position, with the check valve combined action, realize the pressurize of system, when the system off-load, the solenoid valve is in the right position, the control oil circuit pressure of check valve rises, make the valve port start, carry out the oil return of jack and move back top work, thereby realize hydraulic system's off-load.
2. The utility model provides a prestressing force stretch-draw controlling means, after each part installation finishes and checks, begin to start the prestressing force stretch-draw construction of automatic control to bridge steel strand wires, main control unit sends the instruction to the slave controller at bridge both ends simultaneously through the wireless communication module, both ends slave controller synchronous control corresponding jack automatically carries out stretch-draw loading, hold the load and wait, receive work such as top fast, accomplish bridge prestressing force stretch-draw construction process, the slave controller utilizes pressure, displacement sensor to measure the stretch-draw pressure and the steel strand wires stretch-draw elongation data of the jack at bridge both ends, then send the stretch-draw pressure and the steel strand wires stretch-draw elongation data to the main control unit analysis processing immediately through the wireless communication module, adjust the pressure of jack in time according to the actual stretch-draw pressure that pressure sensor feedbacks and be close to theoretical pressure fast, thereby realize the automatic accurate control of stretch-draw force and oil feed rate, and (4) calibrating the actual elongation and the theoretical elongation of the steel strand tension fed back by the displacement sensor, and judging whether the deviation is within an allowable error range so as to ensure that the quality of the prestressed bridge is qualified.
3. The utility model provides a prestressing force stretch-draw controlling means, adopt PID control strategy to accomplish automatic accurate control stretch-draw, improve prestressing force stretch-draw control accuracy, the actual pressure value of both ends jack is gathered respectively through pressure sensor from the controller at bridge both ends, and give main control unit with the actual pressure value feedback of right side both ends jack, carry out the comparison respectively with the pressure setting value and draw the respective pressure deviation in both ends, the pressure deviation is adjusted the back through PID control algorithm respectively, the size of oil pump output flow is adjusted to the rotation speed that comes the adjustment inverter motor from the controller at both ends of controlling respectively, and then the pressure loading speed of adjusting the jack is with being close theoretical design pressure value fast, thereby the accurate bridge prestressing force stretch-draw control accuracy that improves.
Drawings
Fig. 1 is a schematic structural view of the prestress tension control device of the present invention.
Fig. 2 is the hydraulic pump and jack connection schematic diagram of the prestress tension control device of the utility model.
Fig. 3 is a schematic diagram of the prestress tension control device of the present invention.
In the figure: 1. a hydraulic pump; 2. an oil inlet pipe; 3. an oil outlet pipe; 4. a jack; 5. a displacement sensor; 6. a pressure sensor; 7. a slave controller; 8. a main controller; 9. a force sensor; 10. a tool anchor; 11. an oil pump; 12. a motor; 13. a frequency converter; 14. a flow regulating valve; 15. an overflow valve; 16. a diverter valve; 17. a pressure relief valve; 18. an oil tank; 101. a limiting plate; 161. a first oil port; 162. a second oil port; 163. a third oil port; 164. and a fourth oil port.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.
Example 1
Combine figure 1, prestressing force stretch-draw controlling means includes hydraulic pump 1 and jack 4 through advancing oil pipe 2 and going out oil pipe 3 and connecting, jack 4 establishes two, the both ends of bridge are located through the inside steel strand wires symmetry of running through the bridge to two jack 4, one side embedding of jack 4 is provided with instrument anchor 10, one side fixed mounting of instrument anchor 10 has limiting plate 101, advance oil pipe 2 and go out oil pipe 3 and be the three-layer pipeline, the outer HDPE high density polyethylene material that is constitutes, and the middle level is the HDPE high density polyethylene material, and the inlayer is the EVOH material.
The bottom of jack 4 and the junction of advancing oil pipe 2 and going out oil pipe 3 all imbed and are provided with pressure sensor 6, be equipped with displacement sensor 5 on the jack 4, one side fixed mounting force sensor 9 on 4 tops of jack, equal electric connection of force sensor 9, pressure sensor 6, displacement sensor 5 and hydraulic pump 1 is from controller 7, from controller 7 communication connection to main control unit 8.
After all the components are installed and checked, the automatic control prestressed tensioning construction of the bridge steel strand is started, the master controller simultaneously sends instructions to the slave controllers at the two ends of the bridge through the wireless communication module, the slave controllers at the two ends synchronously control the corresponding jacks to automatically perform tensioning loading, load holding waiting, quick roof retracting and the like, the prestressed tensioning construction process of the bridge is completed, the slave controllers measure the tensioning pressure of the jacks at the two ends of the bridge and the tensioning elongation data of the steel strand through the pressure and displacement sensors, then immediately send the tensioning pressure and the tensioning elongation data of the steel strand to the master controller for analysis and processing through the wireless communication module, timely adjust the tensioning pressure of the jacks to be quickly close to the theoretical pressure according to the actual tensioning pressure fed back by the pressure sensors, so that the automatic accurate control of the tensioning force and the oil feeding rate is realized, and the correction is performed according to the actual tensioning elongation and the theoretical tensioning elongation of the steel strand fed back by, and judging whether the deviation is within an allowable error range or not so as to ensure that the quality of the prestressed bridge is qualified.
Referring to fig. 2, the hydraulic pump 1 includes an oil pump 11 connected with a motor 12, an oil pipeline between an oil outlet of the oil pump 11 and an oil inlet of a jack 4 is sequentially connected with a flow regulating valve 14, a reversing valve 16 and a pressure relief valve 17, an oil outlet of the pressure relief valve 17 is provided with a pressure sensor 6 connected with a slave controller 7, the oil outlet of the oil pump 11 is communicated with an oil inlet of the flow regulating valve 14 and a second oil port 162 of the reversing valve 16, a third oil port 163 of the reversing valve 16 is communicated with an oil inlet of the pressure relief valve 17, an oil outlet of the pressure relief valve 17 is communicated with an oil inlet of the jack 4, an oil outlet of the jack 4 is communicated with a fourth oil port 164 of the reversing valve 16, a first oil port 161 of the reversing valve 16 and an oil outlet of the flow regulating valve 14 are respectively communicated with the oil tank 18, the flow regulating valve 14, the reversing valve 16 and the, the oil outlet of the flow control valve 14 is connected with an oil tank 18 through an overflow valve 15, and the overflow valve 15 is connected with an oil pressure gauge for monitoring oil pressure.
When the hydraulic system is loaded, the electromagnetic directional valve is in the left position, and the rotating speed of the alternating current motor is controlled by the frequency converter to adjust the output flow of the oil pump, so that speed regulation is realized, the electromagnet of the electromagnetic directional valve is in the middle position and is in combined action with the one-way valve, pressure maintaining of the system is realized, when the system is unloaded, the electromagnetic valve is in the right position, the pressure of a control oil way of the one-way valve is increased, a valve port is started, oil return and jack withdrawing work of the jack are carried out, and unloading of the hydraulic system is realized.
Example 2
And (3) combining the graph, the main controller and the subordinate controllers adopt a PID control strategy to complete automatic accurate control tensioning, the prestress tensioning control precision is improved, the subordinate controllers at the two ends of the bridge respectively acquire actual pressure values of jacks at the two ends through pressure sensors, and the actual pressure values of the jacks at the right two ends are fed back to the main controller, and are respectively compared with pressure set values to obtain respective pressure deviations at the two ends, after the pressure deviations are respectively adjusted through a PID control algorithm, the subordinate controllers at the two ends are respectively controlled to adjust the rotating speed of a variable frequency motor to adjust the output flow of an oil pump, and then the pressure loading speed of the jacks is adjusted to be close to the theoretical design pressure value quickly, so that the prestress tensioning control precision of the bridge is accurately improved.
Above only be the preferred embodiment of the present invention, not be used for limiting the utility model discloses, the all be in the utility model discloses an any modification of doing in the protection scope, equal replacement etc. all should be contained within the protection scope of the utility model.
Claims (7)
1. Prestressing force stretch-draw controlling means includes hydraulic pump (1) and jack (4) through advancing oil pipe (2) and go out oil pipe (3) and connect, its characterized in that: the bottom of jack (4) and the junction of advancing oil pipe (2) and going out oil pipe (3) all imbed and are provided with pressure sensor (6), be equipped with displacement sensor (5) on jack (4), equal electric connection of pressure sensor (6), displacement sensor (5) and hydraulic pump (1) is from controller (7), from controller (7) communication connection to main control unit (8), hydraulic pump (1) is including oil pump (11) that is connected with motor (12), oil pipe between the oil-out of oil pump (11) and the oil inlet of jack (4) is gone up and is connected gradually flow control valve (14), switching-over valve (16) and pressure relief valve (17), the oil-out department of pressure relief valve (17) is provided with and follows pressure sensor (6) of being connected of controller (7).
2. The prestress tension control device according to claim 1, wherein: the motor (12) is connected with a frequency converter (13), and the oil pump (11) is connected to an oil tank (18).
3. The prestress tension control device according to claim 1, wherein: jack (4) are established two, the both ends of bridge are located through the inside steel strand wires symmetry of running through the bridge in two jack (4), one side embedding of jack (4) is provided with instrument anchor (10), one side fixed mounting of instrument anchor (10) has limiting plate (101).
4. The prestress tension control device according to claim 1, wherein: and a force sensor (9) is fixedly installed on one side of the top end of the jack (4), and the force sensor (9) is electrically connected with the slave controller (7).
5. The prestress tension control device according to claim 1, wherein: the oil outlet of the oil pump (11) is communicated with an oil inlet of the flow regulating valve (14) and a second oil port (162) of the reversing valve (16), a third oil port (163) of the reversing valve (16) is communicated with an oil inlet of the pressure relief valve (17), an oil outlet of the pressure relief valve (17) is communicated with an oil inlet of the jack (4), an oil outlet of the jack (4) is communicated with a fourth oil port (164) of the reversing valve (16), a first oil port (161) of the reversing valve (16) and an oil outlet of the flow regulating valve (14) are respectively communicated with the oil tank (18), and the flow regulating valve (14), the reversing valve (16) and the pressure relief valve (17) are respectively connected with corresponding ports of the slave controller (7).
6. The prestress tension control device of claim 5, wherein: the oil outlet of the flow regulating valve (14) is connected with an oil tank (18) through an overflow valve (15), and the overflow valve (15) is connected with an oil pressure gauge for monitoring oil pressure.
7. The prestress tension control device according to claim 1, wherein: advance oil pipe (2) and go out oil pipe (3) and be the three-layer pipeline, the outer HDPE high density polyethylene material that is constitutes, the middle level is HDPE high density polyethylene material, and the inlayer is the EVOH material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585181.6U CN212865633U (en) | 2020-08-04 | 2020-08-04 | Prestress tension control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585181.6U CN212865633U (en) | 2020-08-04 | 2020-08-04 | Prestress tension control device |
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| CN212865633U true CN212865633U (en) | 2021-04-02 |
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| CN202021585181.6U Active CN212865633U (en) | 2020-08-04 | 2020-08-04 | Prestress tension control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7306756B1 (en) | 2022-02-22 | 2023-07-11 | 中交第二公路工程局有限公司 | Prestress tension control system and method based on voice and image recognition technology |
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2020
- 2020-08-04 CN CN202021585181.6U patent/CN212865633U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7306756B1 (en) | 2022-02-22 | 2023-07-11 | 中交第二公路工程局有限公司 | Prestress tension control system and method based on voice and image recognition technology |
| JP2023121898A (en) * | 2022-02-22 | 2023-09-01 | 中交第二公路工程局有限公司 | Prestress tension control system and method based on voice and image recognition technology |
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