CN201653131U - Hydraulic lifting system for walking beam of large-sized walking beam furnace - Google Patents
Hydraulic lifting system for walking beam of large-sized walking beam furnace Download PDFInfo
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- CN201653131U CN201653131U CN2009201779807U CN200920177980U CN201653131U CN 201653131 U CN201653131 U CN 201653131U CN 2009201779807 U CN2009201779807 U CN 2009201779807U CN 200920177980 U CN200920177980 U CN 200920177980U CN 201653131 U CN201653131 U CN 201653131U
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Abstract
The utility model belongs to a hydraulic lifting system for a walking beam of a large-sized walking beam furnace, which relates to speed regulating, differential motion, energy-saving and simplifying configuration in a walking beam lifting loop in a hearth mechanical hydraulic system. Three cartridge valves (1, 2, 3) are connected with a hydraulic pipeline between an electro-hydraulic proportional flow valve (4) and a pressure compensator (5) to form a differential loop, when the walking beam descends, the hydraulic system is in an unloading state, and oil flows reversely by aid of self weight of blanks and the walking beam and flows through the same proportional valve when a hydraulic cylinder rises so that oil inlet throttling during rising movement is changed into oil return throttling. The hydraulic lifting system can resolve problems of meaningless loss of mechanical impact and power caused by movement direction and pressure oil direction which are identical when the walking beam descends, and further can save a large amount of costs of control elements.
Description
Technical field
The utility model belongs to the hydraulic system technical field in the large-scale walking beam furnace furnace bottom machinery hydraulic system.The loop simple and clear, energy-conservation, that reduce investment outlay that relates in the design of Hydraulic System is designed.When solving step rate simultaneously and descending, the piston rod of lifting hydraulic cylinder be subjected to force direction consistent with the direction of motion, cause mechanical shock and meaningless power consumption problem.
Background technology
In recent years, large-scale walking beam furnace had proposed more high-quality requirement as one of capital equipment of high-speed rod, bar, tubing and sheet material rolling line to the walking beam furnace hydraulic system.When machinery step rate at the bottom of the walking beam furnace when doing ascending motion, the pressure oil P passing ratio valve that makes progress enters the cavity of resorption of hydraulic cylinder, and piston rod is risen.And the descending motion of hydraulic cylinder is more complex than ascending motion.This be because this moment the lifting hydraulic cylinder tailpiece of the piston rod be subjected to force direction consistent with the direction of motion, and also to carry out acceleration and deceleration to its motion and control, bring complexity in the design to hydraulic system.As long as the lifting hydraulic cylinder epicoele has the pressure oil effect, certainly lead to the mechanical shock in the step rate decline process, although the basic configuration and the system principle of at present a lot of hydraulic systems have been made multiple exploration, on system lifting loop, disposed pressure compensation element, make the system architecture more complicated, the element assembly consumption is many, and the element assembly expense is also corresponding to be increased, but this hydraulic system practical function is all undesirable.
The utility model content
The purpose of this utility model is to address the above problem, and first purpose provides such hydraulic system that is used for large-scale walking beam furnace furnace bottom, and this system can reduce the mechanical shock in the step rate decline process.Second purpose be, compared with prior art, adopted structure simpler, and the hydraulic system that the element assembly consumption is few, the 3rd purpose are that new system reduces energy loss.
The purpose of this utility model is achieved in that promptly, has adopted a kind of large-scale walking beam furnace step rate hydraulic lifting system that is used for, and described system mainly comprises;
Pressure oil pipeline P, withdrawing oil pipeline T, first inserted valve, 1, the second inserted valve, 2, the three inserted valves 3, and,
Electro-hydraulic proportional flow valve 4,
Pressure compensator 5,
Control oily oil filter 6,
Accumulator 7,
Left hydraulic cylinder 8, right hydraulic cylinder 9,
Wherein,
First inserted valve, 1, the second inserted valve, 2, the three inserted valves 3, and, electro-hydraulic proportional flow valve 4, the fluid pressure line between the parts of pressure compensator 5 connects to form the differential hydraulic loop,
Control oily oil return line L, in control loop,, use the running of each element assembly of electric control hydraulic system according to preset program.
Like this, just realized above-mentioned purpose.
The beneficial effects of the utility model are, have adopted simpler hydraulic circuit structure, have reduced the element assembly consumption, have reduced the energy loss of system, have reduced the mechanical shock in the beam decline process.
Wherein, adopted a kind of differential economizer, utilized electric liquid chain, when step rate entered letdown procedure, hydraulic system was in unloading condition.Lifting hydraulic cylinder is under the effect of blank and step rate deadweight, and through the differential circuit of being made up of electro-hydraulic proportional valve, inserted valve, a part of fluid adds to the epicoele (rod chamber) of lifting hydraulic cylinder, and unnecessary fluid flows back to fuel tank through three-way connection.Because the lifting hydraulic cylinder epicoele does not have the pressure oil effect, its decline process is steadily reliable.
Description of drawings
Accompanying drawing 1 is a walking beam furnace furnace bottom machinery sketch;
Accompanying drawing 2 is speed/displacement and time graph sketches of each period of motion of walking beam furnace step rate:
Accompanying drawing 3 is present common large-scale walking beam furnace step rate hydraulic drive jacking system figure;
Accompanying drawing 4 is the large-scale walking beam furnace step rate of the utility model hydraulic system structure and running situation key diagram.
The specific embodiment
Accompanying drawing 1 is a walking beam furnace furnace bottom machinery sketch.Realize the motion of step rate by two hoist cylinders 01 and translation oil cylinder 02.The track of doing exercises of step rate is a rectangular path, promptly rises-advance-descend-retreat.Be made up of elevating movement and translational motion, the speed of elevating movement and translational motion is variable, and its purpose is to guarantee that blank contacts traversing beam 04 and lifting beam 03 with lower speed, reduces impact and vibrations to furnace bottom machinery.
Accompanying drawing 2 is speed/displacement and time graph sketches of each period of motion of walking beam furnace step rate, the speed of each period of motion of step rate is exactly hydraulic jack speed, represent with the longitudinal axis, transverse axis is represented displacement and time, step rate is also referred to as the lifting beam, is the example first of the large-scale walking-beam furnace step rate motion of utility model.Time slice ratio among the figure is that the common conventional operating mode of walking-beam furnace furnace bottom machinery is set.Its energy-conservation zone is the dash area in the curve map.Account for 30% of the period of motion as seen from the figure fall time.And step rate when descending required power very low, only for return oil pressure with overcome the power consumption of running roller friction.
Consult Fig. 4, accompanying drawing 4 is the large-scale walking beam furnace step rate of the utility model hydraulic drive jacking system structure and the explanation of running situation.
The formation of this hydraulic system comprises hydraulic power part and signal controlling part, and wherein, hydraulic power part, pressure oil and corresponding pipeline are represented with P, are to provide from oil pump, and the backflow oil circuit represents that with T withdrawing oil flows back to oil cylinder, not shown oil pump.Among the figure, the hydraulic power control section mainly includes three inserted valves as on-off valve, is respectively first inserted valve 1, second inserted valve 2, the 3rd inserted valve 3, and, electro-hydraulic proportional flow valve 4, pressure compensator 5, control oily oil filter 6, left hydraulic cylinder 8, right hydraulic cylinder 9, left hydraulic cylinder 8 and right hydraulic cylinder 9 controlled synchronization actions, this hydraulic cylinder is a workpiece.
And this hydraulic system also comprises accumulator 7.
Connection aspect, pipeline be the P point from figure, promptly from the oil pump outlet, walks to the first point and is divided into two, left side Zhi Xiangji connects pressure compensator 5, electro-hydraulic proportional flow valve 4, the first inserted valves 1, the second inserted valve 2, to the second point, right connects the 3rd inserted valve 3, afterwards, and to the second point, pipeline is joined at second point, walks to third point, is divided into the no bar in a left side and props up, and is connected to the rodless cavity of left hydraulic cylinder 8, that is, cavity of resorption, another right no bar props up, be connected to the rodless cavity of right hydraulic cylinder 9, that is, and cavity of resorption;
And, the rod chamber of left hydraulic cylinder 8, that is, epicoele, a connecting pipe left side has bar to prop up, to the fourth point, the rod chamber of right hydraulic cylinder 9 is that the epicoele connecting pipe right side has bar to prop up, and to the fourth point, joins, tell a pipeline again and connect first inserted valve 1, another pipeline connects gets back to T place among the figure,, gets back to oil cylinder that is.And, to tell a branch road by the P line and enter accumulator 7, the outlet of accumulator 7 connects the import of the oily oil filter 6 of control.The safe hydraulic fluid port and the T pipeline of accumulator 7 join, and get back to fuel tank.That the outlet of controlling oily oil filter 6 is connected to first inserted valve 1 respectively or shuttle valve, second inserted valve 2 or shuttle valve, the 3rd inserted valve 3 or shuttle valve, and, be connected to the pilot valve inlet of electro-hydraulic proportional flow valve 4.
In control system, with each valve member of electric control, that is, according to preset program, with opening and closure of electric control first inserted valve 1, the second inserted valve 2, the three inserted valves 3, and, electro-hydraulic proportional flow valve 4 opening amounts.
Operation principle is: when step rate enters climb procedure, and electromagnet 2DT, 4DT energising, 1DT, 3DT outage.Pressure oil P is through pressure compensator 5, electro-hydraulic proportional flow valve 4 control step beam translational speeds, first, second inserted valve 1,2 enters the cavity of resorption (rodless cavity) of hydraulic cylinder 8,9, and (this moment, the 3rd inserted valve 3 was in closed condition) step rate holds up blank by the shape of a saddle rate curve that configures.After the translation hydraulic cylinder is finished the translation program, when step rate enters letdown procedure, hydraulic system transfers unloading condition to by the high-pressure oil feed state, system pressure only has the back pressure of 1MPa, electromagnet 1DT, 3DT, 4DT energising at this moment, the cavity of resorption (rodless cavity) of lifting hydraulic cylinder 8,9 is under the double action of blank and step rate deadweight, the fluid of its cavity of resorption (rodless cavity) adds to the epicoele of hydraulic cylinder 8,9 through the 3rd inserted valve 3, (second inserted valve 2 is closed) pressure compensator 5, electro-hydraulic proportional flow valve 4, first inserted valve 1, and unnecessary oil stream flows back to fuel tank by being in charge of.The rate curve of electro-hydraulic proportional flow valve 4 control can be identical when rising, and also can set separately according to operating mode.For making electro-hydraulic proportional flow valve 4 operate as normal under the system unloaded state, the control oil circuit is provided with the accumulator 7 of a low capacity, can guarantee the normal controlled pressure of proportioning valve action, eliminate pressure fluctuation, when making system works, when especially hydraulic system is unloading condition, stable action, stable.
The differential link circuit of electricity flow quantity proportioning valve 4 controls design very simple and directly, can realize that step rate rises, the control of the speed when descending, and utilizes the deadweight of load and step rate to reach the effect of control mechanical shock, energy-conservation, saving element expense simultaneously.Its composition comprises:
A. the electro-hydraulic proportional flow valve 4 of control step beam speed;
B. the second the 33 inserted valve 1,2,3 of forming differential circuit; With
C. control the accumulator 7 on the oil circuit.
The electro-hydraulic proportional flow valve 4 of described control step beam speed is the control of external electron-amplifier, and other is by the pressure reduction at pressure compensator control ratio valve port two ends.Entrance throttle governing circuit when step rate rises; Meter out speed governing during decline.
3 inserted valves of first, second, third are formed differential circuit, guarantee that oil cylinder rodless cavity under blank and step rate deadweight effect, utilizes the break-make of 3 inserted valves, make whole loop clear simple and direct, and can realize the differential Energy Saving Control in loop.
Accumulator 7 plays the effect of eliminating the controlled pressure pulsation and accelerating the proportioning valve response speed in the step rate cyclic motion process.And step rate is when descending, and hydraulic system is in unloading condition, and system pressure sharply descends, and accumulator can make the proportioning valve action not be subjected to the influence of system unloaded, guarantees its operate as normal.
The utility model belongs to large-scale walking beam furnace furnace bottom machinery hydraulic system design.Relate to the adjusting of the speed in the step rate lifting loop in the furnace bottom machinery hydraulic system, differential, energy-conservation and simplification configuration.Its principal character is: when step rate descends, hydraulic system is in unloading condition, utilize the deadweight of blank and step rate to form differential circuit, the same ratio valve when fluid reverse flow and process hydraulic cylinder are risen, the meter in when making ascending motion becomes meter out.Utilize inserted valve to realize that the differential very easy of two-way cylinder do not need to increase in addition element, as long as first inserted valve, the 3rd inserted valve and proportional throttle valve 4 are connected simultaneously and can be realized.Because of the meaningless loss of consistent mechanical shock that causes of the direction of motion and power, can also save a large amount of control element expenses in the time of can solving step rate decline by the utility model with the pressure oil direction.
Common large-scale walking beam furnace step rate hydraulic drive jacking system will be with 6 electromagnetic cartridge valves, 2 pressure compensators.Use the utility model hydraulic system only to use three electromagnetic cartridge valves, a pressure compensator, other adds a low capacity accumulator, has just realized intended function.Use novel hydraulic system arrangements of components number of elements few, the effect of reducing investment outlay is obvious.
The utility model can be realized the program cycle motion of large-scale walking beam furnace furnace bottom step rate machinery.And the loop is very simple and clear, and system unloaded can be saved energy.In the hydraulic system of same specification, ad eundem arrangements of components, can save element investment 30%; Save energy more than 20%.
Claims (3)
1. one kind is used for large-scale walking beam furnace step rate hydraulic lifting system, it is characterized in that described system comprises:
Pressure oil pipeline (P), withdrawing oil pipeline (T), first inserted valve (1), second inserted valve (2), the 3rd inserted valve (3), and,
Electro-hydraulic proportional flow valve (4),
Pressure compensator (5),
Control oily oil filter (6),
Accumulator (7),
Left hydraulic cylinder (8), right hydraulic cylinder (9),
Wherein,
First inserted valve (1), second inserted valve (2), the 3rd inserted valve (3), and, electro-hydraulic proportional flow valve (4), the fluid pressure line between the parts of pressure compensator (5) connect to form the differential hydraulic loop and
Control oily oil return line (L), in control loop,, use the running of each element assembly of electric control hydraulic system according to preset program.
2. hydraulic lifting system according to claim 1 is characterized in that: the conduit under fluid pressure connection aspect of described hydraulic system, and pipeline exports from oil pump, be divided into two, left Zhi Xiangji connects pressure compensator (5), electro-hydraulic proportional flow valve (4), first inserted valve (1), second inserted valve (2), right connects the 3rd inserted valve (3), afterwards, pipeline is joined, and is divided into the no bar in a left side again and props up, be connected to the rodless cavity of left hydraulic cylinder (8), another right no bar props up, and is connected to the rodless cavity of right hydraulic cylinder (9)
And, the rod chamber of left hydraulic cylinder (8), a connecting pipe left side has bar to prop up, the rod chamber of right hydraulic cylinder (9), the connecting pipe right side has bar to prop up, after a left side has bar to prop up with the right side bar Zhi Huihe to be arranged, tell a pipeline again and connect first inserted valve (1), another pipeline connects gets back to oil cylinder
And, tell a branch road by pressure oil pipeline (P) line and enter accumulator (7), the outlet of accumulator (7) connects the import of the oily oil filter of control (6), the safe hydraulic fluid port of accumulator (7) and withdrawing oil pipeline (T) pipeline join, get back to fuel tank, that the outlet of controlling oily oil filter (6) is connected to first inserted valve (1) respectively or shuttle valve, second inserted valve (2) or shuttle valve, the 3rd inserted valve (3) or shuttle valve, and the pilot valve that is connected to electro-hydraulic proportional flow valve (4) enters the mouth.
3. hydraulic lifting system according to claim 1 and 2 is characterized in that: described electro-hydraulic proportional flow valve (4) is for the control of external electron-amplifier, by the pressure reduction at pressure compensator control ratio valve port two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201779807U CN201653131U (en) | 2009-09-28 | 2009-09-28 | Hydraulic lifting system for walking beam of large-sized walking beam furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201779807U CN201653131U (en) | 2009-09-28 | 2009-09-28 | Hydraulic lifting system for walking beam of large-sized walking beam furnace |
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| CN201653131U true CN201653131U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201779807U Expired - Fee Related CN201653131U (en) | 2009-09-28 | 2009-09-28 | Hydraulic lifting system for walking beam of large-sized walking beam furnace |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322453A (en) * | 2011-09-13 | 2012-01-18 | 何学才 | Produced hydraulic balance energy-saving modification device of walking beam furnace |
| CN103267038A (en) * | 2013-05-09 | 2013-08-28 | 洛阳理工学院 | Hydraulic control loop capable of controlling multiple lifting platforms |
| CN103290203A (en) * | 2013-06-25 | 2013-09-11 | 上海嘉德环境能源科技有限公司 | Large section steel billet girder type heating furnace bottom stepping device |
| CN103451410A (en) * | 2013-09-27 | 2013-12-18 | 北京佰能电气技术有限公司 | Method for adjusting velocity curve of heating furnace stepping beam quickly |
| CN104712597A (en) * | 2015-03-20 | 2015-06-17 | 浙江明贺钢管有限公司 | Translating hydraulic system device for stepping furnace |
| CN104718150A (en) * | 2012-10-18 | 2015-06-17 | 株式会社丰田自动织机 | Lifting device |
| CN105090147B (en) * | 2014-05-19 | 2018-11-06 | 卡特彼勒公司 | Power tool pitch control system for machine |
| CN109081060A (en) * | 2018-10-17 | 2018-12-25 | 广东富华重工制造有限公司 | Conveying device is used in axle housing processing |
| CN112576564A (en) * | 2020-11-26 | 2021-03-30 | 天津市天锻压力机有限公司 | Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press |
| CN114294275A (en) * | 2021-12-31 | 2022-04-08 | 中冶赛迪技术研究中心有限公司 | Hydraulic control system of walking beam furnace |
| CN116907223A (en) * | 2023-06-19 | 2023-10-20 | 广州白云液压机械厂有限公司 | Hydraulic potential energy recycling and energy saving system of stepping heating furnace |
-
2009
- 2009-09-28 CN CN2009201779807U patent/CN201653131U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322453A (en) * | 2011-09-13 | 2012-01-18 | 何学才 | Produced hydraulic balance energy-saving modification device of walking beam furnace |
| CN104718150A (en) * | 2012-10-18 | 2015-06-17 | 株式会社丰田自动织机 | Lifting device |
| CN104718150B (en) * | 2012-10-18 | 2016-10-12 | 株式会社丰田自动织机 | Lowering or hoisting gear |
| CN103267038A (en) * | 2013-05-09 | 2013-08-28 | 洛阳理工学院 | Hydraulic control loop capable of controlling multiple lifting platforms |
| CN103267038B (en) * | 2013-05-09 | 2017-02-08 | 洛阳理工学院 | Hydraulic control loop capable of controlling multiple lifting platforms |
| CN103290203A (en) * | 2013-06-25 | 2013-09-11 | 上海嘉德环境能源科技有限公司 | Large section steel billet girder type heating furnace bottom stepping device |
| CN103451410A (en) * | 2013-09-27 | 2013-12-18 | 北京佰能电气技术有限公司 | Method for adjusting velocity curve of heating furnace stepping beam quickly |
| CN103451410B (en) * | 2013-09-27 | 2016-03-09 | 北京佰能电气技术有限公司 | A kind of process furnace walking beam velocity curve fast adjustment method |
| CN105090147B (en) * | 2014-05-19 | 2018-11-06 | 卡特彼勒公司 | Power tool pitch control system for machine |
| CN104712597A (en) * | 2015-03-20 | 2015-06-17 | 浙江明贺钢管有限公司 | Translating hydraulic system device for stepping furnace |
| CN109081060A (en) * | 2018-10-17 | 2018-12-25 | 广东富华重工制造有限公司 | Conveying device is used in axle housing processing |
| CN112576564A (en) * | 2020-11-26 | 2021-03-30 | 天津市天锻压力机有限公司 | Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press |
| CN112576564B (en) * | 2020-11-26 | 2023-01-24 | 天津市天锻压力机有限公司 | Pressure balance protection device of double-side horizontal side extrusion cylinder of large servo press |
| CN114294275A (en) * | 2021-12-31 | 2022-04-08 | 中冶赛迪技术研究中心有限公司 | Hydraulic control system of walking beam furnace |
| CN116907223A (en) * | 2023-06-19 | 2023-10-20 | 广州白云液压机械厂有限公司 | Hydraulic potential energy recycling and energy saving system of stepping heating furnace |
| CN116907223B (en) * | 2023-06-19 | 2023-12-08 | 广州白云液压机械厂有限公司 | Hydraulic potential energy recycling and energy saving system of stepping heating furnace |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20160928 |
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| CF01 | Termination of patent right due to non-payment of annual fee |