1.Working principle of multi-strand post-tensioning jack
When the prestressed tendon is stretched, the oil nozzle of the tensioning cylinder enters the oil, the oil nozzle of the pressing oil cylinder returns oil, and the oil cylinder, connecting sleeve and support sleeve are connected together and move to the right of the support anchor ring; the tensioning oil cylinder, end cover nut, The plug and core bushing are connected together, driving the tool anchor to move to the left and stretching the prestressed tendons. When the anchor is compressed and the pulling force is kept stable, the oil nozzle of the compression cylinder will enter the oil, compress the piston and protective sleeve, and generate a compression force.
Model specifications | Nominal tensile force (KN) | Nominal oil pressure (Mpa) | Through-hole diameter (mm) | Install limit plate aperture (mm) | Mounting tool (mm) | Outside diameter size (mm) Diameter * Height |
YDC650 | 650 | 48 | 72 | 99 | 95 | 200*385 |
YDC1000 | 1000 | 50 | 78 | 111 | 111 | 230*385 |
YDC1500 | 1500 | 52 | 94 | 150 | 150 | 270*390 |
YDC2000 | 2000 | 53 | 118 | 177 | 177 | 320*400 |
YDC2500 | 2500 | 52 | 128 | 210 | 185 | 345*400 |
YDC3000 | 3000 | 52 | 135 | 190 | 185 | 370*400 |
YDC3500 | 3500 | 51 | 160 | 232 | 232 | 420*400 |
YDC4000 | 4000 | 52 | 165 | 252 | 252 | 450*410 |
YDC5000 | 5000 | 52 | 196 | 260 | 265 | 500*410 |
YDC6500 | 6500 | 53 | 220 | 295 | 235 | 580*420 |
YDC10000 | 10000 | 50 | 270 | 440 | 415 | 740*570 |
3. Single Acting Lifting Hydraulic Cylinder Jack features:
1. The integral stop ring provides piston burst protection
2. Double-action front retraction
3. Baked enamel exterior finish and plated pistons provide superior corrosion resistance
4. The safety valve on the retracted side of the cylinder helps prevent damage in case of accidental overpressure.
5. Interchangeable hardened grooved saddles come standard
6. Plunger wiper reduces pollution and extends cylinder life
4.Precautions for use of high tonnage hydraulic cylinder jack
1. The average pulling force of steel strands shall not exceed 10 tons per wire.
2. When connecting or disconnecting the control cable, the power supply of the control box must be unplugged. Do not touch the socket of the electrical box during operation to avoid leakage or electric shock.
3. The total pretightening force shall not exceed the weight of the inner steel cylinder, and the pretightening force deviation of each steel strand shall not exceed 1 ton. After pre-tightening, the inner steel cylinder must not lift off the ground or tilt.
4. When lifting, if it is found that it is difficult to withdraw the anchor, causing the steel strand to scatter or bend, apply anchor withdrawal spirit into the tapered hole in time. If the average tension of the steel strands exceeds 10 tons per wire, additional steel strands must be worn.
5. When lifting, check whether the clamping marks of the steel strands are even. If unevenness is found, pre-tighten it in time. If the clamp mark exceeds 0.6 mm, it means that the steel strand is under greater stress and needs to be penetrated.
6. When lifting, it is necessary to adjust the oil pump flow rate and try to achieve simultaneous lifting of each point.
7. Regularly check the clips of the anchors. If the teeth of the clips are worn or the teeth are filled with dirt, replace them.
8. During the lifting process, the infrared displacement sensor must remain stable, and the irradiation point cannot be blocked by objects, otherwise the continuous lifting action will be chaotic.
10. The control wires must be connected to the corresponding jacks, and mixed connection is prohibited, otherwise short circuits may easily occur.
11. When disassembling the oil pipe, first press the "up" and "down" switches without the motor starting. Perform pressure relief operations on the jack. It is prohibited to disassemble the oil pipe under pressure
Workshop
Packing room
Zhongtuo is a manufacturer that designs and manufactures hydraulic cylinders (capacity 10-1000 tons), synchronous PLC hydraulic systems, hydraulic bumps, hydraulic torque wrenches, electric torque wrenches, and hydraulic components.
We have successfully transformed from an OEM manufacturer of Enerpac, Titan to our own brand KIET, and have continuously passed CE, ISO9001:2008 certifications.
Our customers include many large Chinese industrial companies, such as PetroChina, Baosteel, Sinopec, State Grid of China,
FAQ
Q: Are you factory or trade company?
A: We are factory. And we have ourselves trading company.
Q: Warranty terms of your machine?
A: One year warranty for the machine and technical support according to your needs.
Q: What about the voltage of products? Can they be customized?
A: Our standard voltage is 380V, 50HZ, 3phase. The voltage can be customized according to your equirement.
Q: Do hydraulic jacks have calibration certificates?
A: Our hydraulic jacks are calibrated by Chinese authoritative institutions. You can communicate with us for specific details.
Q: What anchorage can I get?
A: If you need to anchor according to the drawings, please provide the drawings for our inspection before production. We have 12.7mm(0.5") and 15.24mm(0.6") types of wedges.
Q: What about the delivery time for mass production?
A: We generally arrange our products within 7 working days. The specific time depends on the order quantity