CN202897924U - Hydraulic jack - Google Patents
Hydraulic jack Download PDFInfo
- Publication number
- CN202897924U CN202897924U CN 201220568363 CN201220568363U CN202897924U CN 202897924 U CN202897924 U CN 202897924U CN 201220568363 CN201220568363 CN 201220568363 CN 201220568363 U CN201220568363 U CN 201220568363U CN 202897924 U CN202897924 U CN 202897924U
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- cylinder
- hydraulic jack
- piston
- stretch
- oil cylinder
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Abstract
The utility model discloses a hydraulic jack which comprises a cylinder tube, a stretch-draw oil cylinder, a return stroke oil cylinder, a piston rod, a piston seal, a displacement detecting module and a pressure sensor. The piston rod is placed inside the cylinder tube. A piston end of the piston rod is in contact with the inner wall of the cylinder tube through the piston seal. The stretch-draw oil cylinder is placed at the lower end of the piston end. The return stroke oil cylinder is placed at the upper end of the piston end. The hydraulic jack is characterized in that the displacement detecting module and the pressure sensor are arranged inside a cylinder body. An oil guiding hole is arranged between the inner wall of the cylinder tube and the outer wall of the cylinder tube. The pressure sensor is communicated with the stretch-draw oil cylinder through the oil guiding hole. The hydraulic jack has the advantages of being compact in structure, easy to operate, high in automated degrees, strong in practical applicability and the like. In addition, the hydraulic jack is particularly suitable for projects of a prestressed concrete structure, prestressed tension of constructional elements, prestressed anchoring of rocks and soil and the like.
Description
Technical field
The utility model relates to a kind of hydraulic jack, particularly a kind of hydraulic jack that comprises displacement detecting module and pressure sensor.
Background technology
The hydraulic jack of prior art, mainly partly formed by stretch-draw oil cylinder, backhaul oil cylinder, piston rod, punching cover, large plug, static and dynamic sealing circle etc., be applicable to tension reinforcing steel bar bundle or bundled steel wires, its feature is: have a punching duct, reinforcing bar (or steel wire) to penetrate rear moveable anchor anchoring by afterbody along the jack axle center.During tensioned prestressing bar, the oil-feed of stretch-draw oil cylinder oil nozzle, the oil return of backhaul oil cylinder oil nozzle, cylinder barrel and setscrew nut are connected and withstand anchor ring; Piston rod drives moveable anchor and moves tensioned prestressing bar; When pressure reaches expected value, keeping under the stable condition of stretching force, the oil-feed of backhaul oil cylinder oil nozzle, the oil return of stretch-draw this moment oil cylinder oil nozzle, backhaul oil cylinder, piston rod backhaul, prestressing tendon bounces back from anchor under the prestress effect; At last, stretch-draw oil cylinder, kicker cylinder oil, piston rod back resetting.
The hydraulic feed-through jack compact conformation, energy is the jacking weight steadily, and hoisting capacity is large, driving efficiency is higher, therefore use wider.But the stretch value that jack can not the automatic gauge piston rod ejects in the prior art must generally be measured piston rod with steel ruler and eject length by artificial means, has larger measured error, and there is potential safety hazard in survey crew.The tradition jack can not directly react its stretch-draw oil cylinder oil pressure value, generally read the high-pressure oil pump force value as the stretch-draw force value by the compression indicator on the fuel tank, compression indicator general precision lower (being generally 1Mpa), there is larger error in artificial reading, easily causes final stretching force value inaccurate.
There is following shortcoming in existing traditional centre-hole jack:
1) stretch value that can not the reacting piston masthead goes out of traditional centre-hole jack can not carry out data exchange with computing machine etc., also just can not realize the real-time measurement of stretch value;
2) traditional centre-hole jack is established oil pressure indicator at the fuel tank place, and this table has directly reacted the oil pressure value of high-pressure oil pump, rather than the oil pressure force value of stretch-draw jack, can not carry out data exchange with computing machine etc., situation of change that can not the real-time response force value;
3) with the naked eye read the oil pressure tabular value by manual type and obtain jack oil pressure pressure data, since the vibrations of machine, oil meter pointer can be violent swing, add the problems such as the precision of oil meter is low, and the horizontal problem of workman's reading, this all affects the accuracy of reading;
4) be the stretch value that jack cylinder ejects at the elongation of measuring prestressing tendon, mainly take at present manual type, go to measure with steel ruler, have larger error in reading and measured error, the artificial interference factor is larger, and there is potential safety hazard in manual operation.
The utility model content
The utility model purpose is to provide a kind of fluid pressure type jack, to overcome the problems referred to above.
For achieving the above object, the utility model provides a kind of hydraulic jack, comprise cylinder barrel, the stretch-draw oil cylinder, the backhaul oil cylinder, piston rod, piston packing, Signal plug, the displacement detecting module, pressure sensor, piston rod is positioned at the inside of cylinder barrel, the piston end of piston rod contacts with inner wall of cylinder by piston packing, the stretch-draw oil cylinder is positioned at the lower end of piston end, the backhaul oil cylinder is positioned at the upper end of piston end, Signal plug is positioned at the top of cylinder barrel, it is characterized in that the displacement detecting module, pressure sensor places cylinder interior, between inner wall of cylinder and the outer wall oil guiding hole is arranged, pressure sensor is communicated with the stretch-draw oil cylinder by oil guiding hole.
Preferably, the skin of piston rod has equally spaced several grooves, forms concavo-convex notch, and the displacement detecting module is comprised of probe, groove weighting material, and probe is positioned at the end of cylinder barrel, and the groove weighting material is positioned at groove.
Preferably, the groove weighting material is the material that is different from piston rod.
Preferably, the groove weighting material is generally copper, nickel, porcelain.
Preferably, also comprise signal processing circuit, signal processing circuit links to each other with probe and pressure sensor, and it is output as digital signal.
Preferably, also comprise Signal plug, Signal plug links to each other with signal processing circuit.
Preferably, a side of cylinder barrel outer wall connects handle.
The utlity model has following beneficial effect:
(1) displacement detecting module, pressure sensor place cylinder interior, have improved the service life of displacement detecting module and pressure sensor, have reduced the influence factor of environment, improve stability and the accuracy measured.
(2) pressure sensor is communicated with the stretch-draw oil cylinder by oil guiding hole, can directly measure the force value of stretch-draw oil cylinder, and survey precision is high, is not subjected to interference from human factor.
(3) probe of displacement detecting module utilizes the magnetosensitive effect principle, measure change in displacement by the situation of change of surveying concavo-convex notch, the real-time change in displacement of induction piston bar, the stretch value of reaction prestressing tendon, survey precision is high, is not subjected to interference from human factor.
(4) the groove weighting material is the material that is different from piston rod, the more suitable identification of popping one's head in, and detection accuracy is higher.
(5) including signal processing circuit, can be digital signal with analog signal conversion, can realize intelligent display behind the external computing machine so that the jack Based Intelligent Control become possibility.
(6) whole measurement process does not need manually to carry out, and does not have potential safety hazard.
Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.The below is described in further detail the utility model with reference to figure.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the cutaway view of the utility model preferred embodiment;
Fig. 2 is the birds-eye view of the utility model preferred embodiment.
Description of symbols: 1, piston end; 2, stretch-draw oil cylinder; 3, piston rod; 4, cylinder barrel; 5, punching cover; 6, oil guiding hole; 7, pressure sensor; 8, probe; 9, handle; 10, groove; 11, Signal plug; 12, piston packing; 13, signal processing circuit; 14, backhaul oil cylinder.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the utility model can be implemented according to the multitude of different ways that claim limits and covers.
Referring to Fig. 1, Fig. 2, hydraulic jack mainly is comprised of cylinder barrel 4, stretch-draw oil cylinder 2, backhaul oil cylinder 14, piston rod 3, piston packing 12, displacement detecting module, pressure sensor 7, piston rod 3 is positioned at the inside of cylinder barrel 4, the piston end 1 of piston rod 3 contacts with cylinder barrel 4 inwalls by piston packing 12, stretch-draw oil cylinder 2 is positioned at the lower end of piston end 1, backhaul oil cylinder 14 is positioned at the upper end of piston end 1, displacement detecting module, pressure sensor 7 place cylinder interior, between cylinder barrel 4 inwalls and the outer wall oil guiding hole 6 is arranged, pressure sensor 7 is communicated with stretch-draw oil cylinder 2 by oil guiding hole 6.During use, the oil pipe of hydraulic jack connects the oil outlet of tensioning equipment and the oil inlet of jack, oil pipe connects the return opening of tensioning equipment and the oil outlet of jack, 2 oil-feeds of stretch-draw oil cylinder, 14 oil returns of backhaul oil cylinder, piston rod 3 stretches out, and piston rod 3 withstands the instrument anchor ring, and stretch-draw oil cylinder 2, piston rod 3, the punching cover 5 drive instrument anchor ring that is connected moves tensioned prestressing bar, the simultaneous displacement detecting module is measured piston rod 3 shift values, and pressure sensor 7 is measured stretch-draw oil cylinder 2 force value; When tension stress reaches design value, keeping holding lotus after a period of time under the stable condition of stretching force, 2 releases of stretch-draw oil cylinder, after stretch-draw oil cylinder 2 oil pressure reach expected value, 14 oil-feeds of backhaul oil cylinder, piston rod 3 begins to retract, 2 oil returns of stretch-draw this moment oil cylinder, piston rod 3 back resettings.The displacement detecting module is used for measuring the shift value of piston rod 3, pressure sensor 7 is used for measuring the force value of stretch-draw oil cylinder 2, displacement detecting module and stretch-draw oil cylinder 2 all place cylinder interior, improve the service life of displacement detecting module and pressure sensor 7, reduced the influence factor of environment, improved stability and the accuracy measured, pressure sensor 7 is communicated with stretch-draw oil cylinder 2 by oil guiding hole 6, can directly measure the force value of stretch-draw oil cylinder 2, survey precision is high, is not subjected to interference from human factor.
In addition, can also be provided with at the skin of piston rod 3 equally spaced several grooves 10, form concavo-convex notch, the displacement detecting module can be comprised of probe 8, groove weighting material, probe 8 is positioned at the end of cylinder barrel 4, the groove weighting material is positioned at groove 10, under magnetic fields, probe 8 utilizes the magnetosensitive effect principle, measure change in displacement by the situation of change of surveying concavo-convex notch, the real-time change in displacement of induction piston bar 3, reaction be the stretch value of prestressing tendon, therefore survey precision is high, is not subjected to interference from human factor.The groove weighting material is generally other material different from piston rod 3 such as copper, nickel, porcelain.
In addition, probe 8 and pressure sensor 7 can pass to measurement signal signal processing circuit 13 with after signal processing circuit 13 links to each other, after the signal processing, measurement signal carries out data exchange by Signal plug 11, data line and computing machine after being converted to digital signal, realizes intellectualized operation.
In addition, a side of cylinder barrel 4 outer walls also can connect a handle 9, is convenient to guide and support.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. hydraulic jack, comprise cylinder barrel, stretch-draw oil cylinder, backhaul oil cylinder, piston rod, piston packing, displacement detecting module, pressure sensor, piston rod is positioned at the inside of cylinder barrel, the piston end of piston rod contacts with inner wall of cylinder by piston packing, the stretch-draw oil cylinder is positioned at the lower end of piston end, the backhaul oil cylinder is positioned at the upper end of piston end, it is characterized in that, displacement detecting module, pressure sensor place cylinder interior, between inner wall of cylinder and the outer wall oil guiding hole is arranged, pressure sensor is communicated with the stretch-draw oil cylinder by oil guiding hole.
2. hydraulic jack as claimed in claim 1, the skin that it is characterized in that piston rod has equally spaced several grooves, forms concavo-convex notch, and the displacement detecting module is comprised of probe, groove weighting material, probe is positioned at the end of cylinder barrel, and the groove weighting material is positioned at groove.
3. hydraulic jack as claimed in claim 2 is characterized in that described groove weighting material is the material that is different from piston rod.
4. hydraulic jack as claimed in claim 2 is characterized in that described groove weighting material is copper, nickel, porcelain.
5. such as each described hydraulic jack of claim 1-4, characterized by further comprising signal processing circuit, signal processing circuit links to each other with probe and pressure sensor, and it is output as digital signal.
6. hydraulic jack as claimed in claim 5 characterized by further comprising a Signal plug, and Signal plug links to each other with signal processing circuit.
7. such as each described hydraulic jack of claim 1-4, it is characterized in that a side of cylinder barrel outer wall connects handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568363 CN202897924U (en) | 2012-10-31 | 2012-10-31 | Hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568363 CN202897924U (en) | 2012-10-31 | 2012-10-31 | Hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202897924U true CN202897924U (en) | 2013-04-24 |
Family
ID=48118618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220568363 Expired - Lifetime CN202897924U (en) | 2012-10-31 | 2012-10-31 | Hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202897924U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403459A (en) * | 2015-12-28 | 2016-03-16 | 天津易联创新机电有限公司 | Tension tester |
| CN106049291A (en) * | 2016-07-26 | 2016-10-26 | 王家梁 | Clip sleeve type tensioning system for bridge built-in hollow force transducer and method |
| CN106672846A (en) * | 2017-03-13 | 2017-05-17 | 钟浪雅 | Front-clamping type hydraulic jack having pressure overload alarming function |
| CN108799395A (en) * | 2017-04-29 | 2018-11-13 | 益阳天华两栖车艇有限公司 | A kind of scalable barrel mast formula damper |
| CN111474060A (en) * | 2020-04-30 | 2020-07-31 | 武汉大学 | Quick and automatic measuring device for engineering rock mechanical parameters and application method |
-
2012
- 2012-10-31 CN CN 201220568363 patent/CN202897924U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403459A (en) * | 2015-12-28 | 2016-03-16 | 天津易联创新机电有限公司 | Tension tester |
| CN105403459B (en) * | 2015-12-28 | 2018-08-07 | 刘波 | Tension tester |
| CN106049291A (en) * | 2016-07-26 | 2016-10-26 | 王家梁 | Clip sleeve type tensioning system for bridge built-in hollow force transducer and method |
| CN106049291B (en) * | 2016-07-26 | 2018-01-30 | 王家梁 | Hollow force snesor bite type tensioning system and method built in bridge |
| CN106672846A (en) * | 2017-03-13 | 2017-05-17 | 钟浪雅 | Front-clamping type hydraulic jack having pressure overload alarming function |
| CN108799395A (en) * | 2017-04-29 | 2018-11-13 | 益阳天华两栖车艇有限公司 | A kind of scalable barrel mast formula damper |
| CN111474060A (en) * | 2020-04-30 | 2020-07-31 | 武汉大学 | Quick and automatic measuring device for engineering rock mechanical parameters and application method |
| CN111474060B (en) * | 2020-04-30 | 2021-12-03 | 武汉大学 | Quick and automatic measuring device for engineering rock mechanical parameters and application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Hydraulic jack self-calibrating system and self-calibrating method Effective date of registration: 20150925 Granted publication date: 20130424 Pledgee: Bank of Beijing Limited by Share Ltd. Changsha branch Pledgor: Hunan Lianzhi Bridge and Tunnel Technology Co.,Ltd. Registration number: 2015430000024 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170113 Granted publication date: 20130424 Pledgee: Bank of Beijing Limited by Share Ltd. Changsha branch Pledgor: Hunan Lianzhi Bridge and Tunnel Technology Co.,Ltd. Registration number: 2015430000024 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No.168, Section 2, Yanhe Road, Wangcheng economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: Hunan Lianzhi Technology Co.,Ltd. Address before: 410015 42 / F, Xiangshang century Xincheng, 17 Kaiyuan Road, Changsha Economic Development Zone, Hunan Province Patentee before: HUNAN LIANZHI BRIDGE AND TUNNEL TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |