CN104089078A - Proportional control device used for linear-stroke valve - Google Patents
Proportional control device used for linear-stroke valve Download PDFInfo
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- CN104089078A CN104089078A CN201410339767.7A CN201410339767A CN104089078A CN 104089078 A CN104089078 A CN 104089078A CN 201410339767 A CN201410339767 A CN 201410339767A CN 104089078 A CN104089078 A CN 104089078A
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- oil
- valve
- hydraulic
- fuel tank
- hydraulic cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2846—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using detection of markings, e.g. markings on the piston rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Check Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to proportional control devices used for linear-stroke valves, and provides a proportional control device used for a linear-stroke valve in order to solve the problems that when a servo valve is used for regulating the opening degree of a linear-stroke valve opening and closing piece, the cost is high and maintenance is uneasy or when a proportional reversing valve is used for regulating, the precision is not high enough and the cost is high. The proportional control device used for the linear-stroke valve comprises an oil supply system and a working oil path. The oil supply system comprises an oil tank and an oil pump, and the oil pump pumps hydraulic oil from the oil tank so as to provide working power for the device. A working system comprises two two-position three-way digital valve, one group of stacked double unidirectional valve hydraulic valves and a single-rod piston-type hydraulic cylinder, and the end, arranged outside a cylinder body, of a piston rod of the hydraulic cylinder is connected with an opening and closing piece of a valve with the opening degree of the opening and closing piece needing to be regulated. By means of the proportional control device used for the linear-stroke valve, the opening degree of the opening and closing piece can be regulated precisely, and the proportional control device is simple in operation, low in cost, good in stain resistance and easy to maintain.
Description
Technical field
The present invention relates to the ratio control device of valve flow, the ratio control device that the stroke that relates in particular to a kind of valve opening and closing element is straight line.
Background technique
Valve is the controlling component in fluid delivery system, has cut-off, adjusting, water conservancy diversion, prevents the functions such as adverse current, voltage stabilizing, shunting or overflow pressure relief.The open-shut device of valve is in order to control the circulation of working medium in valve, and wherein, the open-shut device of the valves such as gate valve and angle valve is in switching process, and the stroke of open-shut device is straight line.
Take gate valve as example, and gate valve refers to the valve that open-shut device moves along the Vertical direction of path center line.The open-shut device of gate valve is flashboard, and moving direction and the flow direction of flashboard are perpendicular, and fluid flow resistance is little and to open and close required moment little, and MEDIA FLOW is to unrestricted, non-water-attack phenomenon during keying, and physique structure is fairly simple, and anufacturability is better.The flashboard of gate valve can regulate aperture size, thereby play the uninterrupted of circulation in restriction gate valve, but the common volume of gate valve of large latus rectum is larger, only depend on manpower cannot complete the adjusting of flashboard aperture, and because installing space is limit, most of mounted gate valve in use cannot be used manpower or stage property to regulate the aperture of flashboard for sluice valve.
When needs carry out ratio while controlling flow to gate valve, conventionally can use 3-position 4-way proportional reversing valve or servovalve the keying degree of flashboard for sluice valve is carried out to Set-value adjustment, its result is comparatively accurate.But because proportional reversing valve self exists zero-bit dead band phenomenon, there will be the slower situation of speed of response, and the valve port opening of proportional reversing valve is larger while causing usage ratio selector valve, while causing usage ratio selector valve to regulate, precision is not high.
The zero-bit of servovalve is substantially naked, while therefore using servovalve to regulate flashboard for sluice valve aperture, speed of response is very fast, but the specified opening amount of servovalve is generally less than 0.5mm (millimeter), when this makes the flashboard keying degree of large-scale gate valve regulate, need to adopt the servovalve of larger flow, increased and realized cost, and servovalve is because precision is high, and complex manufacturing, makes its maintenance difficulties higher.
Meanwhile, proportional reversing valve or servovalve, they are all high-precision valve, and the clean level of working medium is had relatively high expectations, contamination resistance is poor, higher to the environmental requirement of use occasion.
Summary of the invention
High and the easy care not of the cost that brings when solve using the aperture of the valve opening and closing element that servovalve is straight line to stroke to regulate, or the precision brought while regulating of the aperture of the usage ratio selector valve valve opening and closing element that is straight line to stroke not and the higher problem of cost, the present invention proposes a kind of ratio control device for rectilinear path valve, should comprise oil supply system and working oil path for the ratio control device of rectilinear path valve, described oil supply system comprises fuel tank and oil pump, described oil pump extracts hydraulic oil from described fuel tank, thereby provide operation power to this device, described working oil path comprises the digital valve of two two-position three ways, one group of overlapping double check valve hydraulic control valve and a single-rod piston formula oil hydraulic cylinder, and one end that described hydraulic cylinder piston rod is arranged on outside cylinder body is connected with regulating the open-shut device of the valve of open-shut device aperture, wherein,
The first digital valve passes into hydraulic oil in order to the rodless cavity to described oil hydraulic cylinder, the oil suction chamber of described the first digital valve is connected with described fuel tank by described oil pump, between the filler opening of working oil chamber and the first one-way valve in described overlapping double check valve hydraulic control valve, by connecting pipeline, be communicated with, branch line is set on this connecting pipeline to be connected with the control port of the second one-way valve in described overlapping double check valve hydraulic control valve, for making a part of hydraulic oil of described the first digital valve working oil chamber outflow flow into the control port of the second one-way valve, the oil outlet of described the first one-way valve is connected with the rodless cavity of described oil hydraulic cylinder,
The second digital valve passes into hydraulic oil in order to the rod chamber to described oil hydraulic cylinder, the oil suction chamber of described the second digital valve is connected with described fuel tank by described oil pump, between the filler opening of working oil chamber and described the second one-way valve in described overlapping double check valve hydraulic control valve, by connecting pipeline, be communicated with, branch line is set on this connecting pipeline to be connected with the control port of described the first one-way valve, for making a part of hydraulic oil of described the second digital valve working oil chamber outflow flow into the control port of described the first one-way valve, the oil outlet of described the second one-way valve is connected with the rod chamber of described oil hydraulic cylinder.
When this ratio control device for rectilinear path valve does not start, the piston rod of described oil hydraulic cylinder keeps original position motionless.
When described the first digital valve being connected with the rodless cavity of described oil hydraulic cylinder is switched on, described the first digital valve commutation, described oil pump is extracted hydraulic oil out from described fuel tank, by the first one-way valve in this first digital valve and described overlapping double check valve hydraulic control valve, in the rodless cavity of described oil hydraulic cylinder, pass into hydraulic oil, make the piston rod of this oil hydraulic cylinder stretch out oil hydraulic cylinder, need to regulate the open-shut device of the valve of open-shut device aperture to promote to liquid chunnel direction, simultaneously, a part for the hydraulic oil flowing out from the first digital valve of described connection, by the arm of the connecting pipeline between the first digital valve and the first one-way valve, flow into the control port of the second one-way valve, enter in described the second one-way valve and the spool of described the second one-way valve is backed down, open described the second one-way valve, the rodless cavity of described oil hydraulic cylinder is passed into promote after hydraulic oil the hydraulic oil in rod chamber that piston discharges to flow out from the second one-way valve, and flow back to described fuel tank through described second digital valve of this device, thereby reach, reduce the object of aperture that the trip is the valve opening and closing element of straight line, reduced the size of the flow of the working medium flowing out from this valve.
When described the second digital valve being connected with the rod chamber of described oil hydraulic cylinder is switched on, described the second digital valve commutation, described oil pump is extracted hydraulic oil out from described fuel tank, by the second one-way valve in the second digital valve and described overlapping double check valve hydraulic control valve, in the rod chamber of described oil hydraulic cylinder, pass into hydraulic oil, make the piston rod retraction oil hydraulic cylinder of this oil hydraulic cylinder, need to regulate the open-shut device of the valve of open-shut device aperture to drag to the direction of piston rod movement, simultaneously, a part for the hydraulic oil flowing out from the second digital valve of described connection, by the arm of the connecting pipeline between described the second digital valve and described the second one-way valve, flow into the control port of the first one-way valve, enter in described the first digital valve and the spool of described the first one-way valve is backed down, open described the first digital valve, the rod chamber of described oil hydraulic cylinder is passed into promote after hydraulic oil the hydraulic oil in rodless cavity that piston discharges to flow out from the first one-way valve, and flow back to described fuel tank through described the first digital valve in this device, thereby reach the object of the aperture that increases the valve opening and closing element that the trip is straight line, increased the size of the flow of the working medium flowing out from this valve.
Use the ratio control device for rectilinear path valve of the present invention, can be according to actual needs, by control to pass in oil hydraulic cylinder hydraulic oil number regulate hydraulic cylinder piston rod to stretch out length, thereby the aperture of the valve opening and closing element that to reach stroke be straight line regulates, and then can regulate the object of the uninterrupted of the working medium by valve, and this device is simple to operate, cost is low, and digital valve and overlapping double check valve hydraulic control valve is simple in structure, stain resistance is good, and it is comparatively easy therefore to safeguard.
Preferably, should also comprise for the ratio control device of rectilinear path valve a protection oil circuit, described protection oil circuit comprises a two position three way directional control valve and an oil-feed Pilot operated check valve, the oil suction chamber of described two position three way directional control valve is connected with described fuel tank by described oil pump, a working oil chamber is connected with the oil circuit control of described oil-feed Pilot operated check valve, and another working oil chamber is connected with described fuel tank; The filler opening of described oil-feed Pilot operated check valve is connected with the rodless cavity of described oil hydraulic cylinder, and oil outlet is connected with described fuel tank.When the working oil path of the described ratio control device for rectilinear path valve breaks down, open described two position three way directional control valve, hydraulic oil enters described two position three way directional control valve by oil pump, and enter from the control port of described oil-feed Pilot operated check valve, the spool of described oil-feed Pilot operated check valve is backed down, hydraulic oil in fuel tank can directly be entered in the rodless cavity of described oil hydraulic cylinder by described oil pump, and by staff, the pipeline being connected on described oil hydraulic cylinder rod chamber is connected with described fuel tank, the piston rod of described oil hydraulic cylinder is stretched out, the open-shut device of valve is pushed to the bottom of liquid chunnel, make this valve closing, then the working oil path of the described ratio control device for rectilinear path valve is detected and keeped in repair.In the situation that working oil path goes wrong, protection oil circuit throttle down rapidly, avoids working medium flow in valve liquid chunnel excessive and follow-up work element is exerted an influence, and has guaranteed the normal operation of whole system.
Further; described protection oil circuit is also provided with an oil extraction Pilot operated check valve; the control port of this oil extraction Pilot operated check valve is connected with the working oil chamber that described two position three way directional control valve is connected the control port of described oil-feed Pilot operated check valve; the oil outlet of described oil extraction Pilot operated check valve is connected with the rod chamber of described oil hydraulic cylinder, and filler opening is connected with described fuel tank.When the working oil path of the described ratio control device for rectilinear path valve breaks down, the hydraulic oil flowing out from the working oil chamber of described two position three way directional control valve is not only opened the spool of described in line check valve, also the spool of described oil extraction Pilot operated check valve is opened simultaneously, hydraulic oil in described oil hydraulic cylinder rod chamber can be entered in described fuel tank by this oil extraction Pilot operated check valve, and without by manually the pipeline on described oil hydraulic cylinder rod chamber being connected on described fuel tank.And when the open-shut device of rectilinear path valve need to be from larger opening to less regulation, can first close described working oil path, open described protection oil circuit, re-use described protection oil circuit and be filled with hydraulic oil in the rodless cavity of described oil hydraulic cylinder, this rectilinear path valve opening and closing element is closed rapidly, then close described protection oil circuit, open described working oil path, and to described the second digital valve energising, make hydraulic oil through described the second digital valve and described the second one-way valve, be filled in the rod chamber of described oil hydraulic cylinder, the piston rod of described oil hydraulic cylinder is return in described oil hydraulic cylinder, open gradually the open-shut device of this rectilinear path valve, spent time while having shortened valve opening and closing element from larger opening to less regulation, increased adjusting efficiency, and there will not be while adopting working oil path slowly to adjust, from the working medium of the larger flow that flows out in this rectilinear path valve, follow-up work element is produced to the situation of impacting, ensured the normal use of subsequent element.
Preferably, on the piston rod of described oil hydraulic cylinder, be provided with the scale value that scale division value is 0.5mm.Scale value by recording and analyses bar motion initial position and finally stop after scale value, can accurately draw the length scale that described piston rod stretches out or bounces back, then compare the entire length that stroke is the valve opening and closing element of straight line, can calculate the aperture that stroke is the valve opening and closing element of straight line, thereby reflect that intuitively described stroke is the regulating degree of the valve opening and closing element of straight line.
Preferably, on described fuel tank, be provided with oil-suction oil filter, hydraulic oil enters described oil pump by described oil-suction oil filter.Described oil-suction oil filter filters in order to the hydraulic oil in fuel tank described in sucking-off, thereby guarantees the stable operation of the described ratio control device for rectilinear path valve, reduces this and states the frequency of maintenance for the ratio control device of rectilinear path valve.
Preferably, on described fuel tank, be provided with return oil filter, the hydraulic oil that returns to described fuel tank flows into fuel tank by this return oil filter.Described return oil filter is in order to filter the hydraulic oil being back in described fuel tank, thereby the clean degree of hydraulic oil in assurance fuel tank, guarantee the stable operation of the described ratio control device for rectilinear path valve, reduce this for the frequency of maintenance of the ratio control device of rectilinear path valve.
The present invention is for the ratio control device of rectilinear path valve; the problems such as the cost bringing when usage ratio selector valve or servovalve regulate the open-shut device aperture of valve is high, maintenance is inconvenient have not only been solved; in the situation that guaranteeing degree of regulation; the present invention has also increased protection oil circuit for the ratio control device of rectilinear path valve, and the Security of whole work system is increased greatly.
Accompanying drawing explanation
Fig. 1 is that the present invention regulates the schematic diagram of controlling device for the ratio of rectilinear path valve.
Embodiment
As shown in Figure 1; the present invention comprises oil supply system 1, working oil path 2 and protection oil circuit 3 for the ratio control device of rectilinear path valve; oil supply system 1 comprises fuel tank 11, oil pump 12 and oil-suction oil filter 13 and return oil filter 14; oil pump 12 extracts hydraulic oil from fuel tank 11, thereby to this, the ratio control device for rectilinear path valve provides operation power after oil-suction oil filter 13 filters.
The digital valve that working oil path 2 comprises two two-position three ways i.e. the first digital valve 21, the second digital valve 22, one group of overlapping double check valve hydraulic control valve 23 and single-rod piston formula oil hydraulic cylinder 24, one end that the piston rod 243 of oil hydraulic cylinder 24 is arranged on outside cylinder body is connected with regulating the open-shut device of the valve of open-shut device aperture, and is provided with the scale value that precision is 0.5mm on this piston rod 243.Overlapping double check valve hydraulic control valve 23 is comprised of two Pilot operated check valves the first one-way valve 231 and the second one-way valve 232, during connection, on the connecting pipeline at the filler opening place of the first one-way valve 231, arm is set, this arm is connected with the control port of the second one-way valve 232, in order to open the spool of the second one-way valve 232, make hydraulic oil flow into and to flow out from filler opening from the oil outlet of the second one-way valve 232; Simultaneously, on the connecting pipeline at the filler opening place of the second one-way valve 232, arm is set, this arm is connected with the control port of the first one-way valve 231, in order to open the spool of the first one-way valve 231, makes hydraulic oil flow into and to flow out from filler opening from the oil outlet of the first one-way valve 231.
The first digital valve 21 is in order to pass into hydraulic oil in the rodless cavity 241 to oil hydraulic cylinder, the oil suction chamber of this first digital valve 21 is connected by oil pump 12 and oil-suction oil filter 13 with fuel tank 11, a working oil chamber is connected with the connecting pipeline at the filler opening place of the first one-way valve 231, and the oil outlet of this first one-way valve 231 is connected with the rodless cavity 241 of oil hydraulic cylinder 24, simultaneously, from the first digital valve 21, flow to a part for the hydraulic oil of the first one-way valve 231, the arm arranging on the connecting pipeline at the filler opening place of the first one-way valve 231, flow to the control port of the second one-way valve 232 in overlapping double check valve hydraulic control valve 23, enter in the second one-way valve 232 and the second one-way valve 232 spools are backed down, the second one-way valve 232 is opened,
The second digital valve 22 is in order to pass into hydraulic oil in the rod chamber 242 to oil hydraulic cylinder 24, the oil suction chamber of this second digital valve 22 is connected by oil pump 12 and oil-suction oil filter 13 with fuel tank 11, a working oil chamber is connected with the connecting pipeline at the filler opening place of the second one-way valve 232, and the oil outlet of this second one-way valve 232 is connected with the rod chamber 242 of oil hydraulic cylinder 24, simultaneously, from this second digital valve 22, flow to a hydraulic oil part for the second one-way valve 232, the arm arranging on the connecting pipeline at the filler opening place of the second one-way valve 232, flow to the control port of the first one-way valve 231 in overlapping double check valve hydraulic control valve 23, enter in the second one-way valve 232 and the first one-way valve 231 spools are backed down, the first one-way valve 231 is opened,
Protection oil circuit 3 comprises a two position three way directional control valve 31, oil-feed Pilot operated check valve 32 and an oil extraction Pilot operated check valve 33, the oil suction chamber of two position three way directional control valve 31 is connected with fuel tank 11 by oil pump 12 and oil-suction oil filter 13, a working oil chamber is connected by connecting pipeline with the control port of oil-feed Pilot operated check valve 32 and the control port of oil extraction Pilot operated check valve 33, and another working oil chamber is connected with fuel tank 11 by return oil filter 14; The filler opening of oil-feed Pilot operated check valve 32 is connected with the rodless cavity 241 of oil hydraulic cylinder 24, and oil outlet is connected with fuel tank 11 by oil pump 12 and oil-suction oil filter 13; The oil outlet of oil extraction Pilot operated check valve 33 is connected with the rod chamber 242 of oil hydraulic cylinder 24, and filler opening is connected with fuel tank 11 by return oil filter 14.
When this ratio control device for rectilinear path valve does not start, the piston rod 243 of oil hydraulic cylinder 24 keeps original position motionless.
When the first digital valve 21 energising that the rodless cavity 241 to oil hydraulic cylinder 24 is connected, the first digital valve 21 commutations, oil pump 12 is extracted hydraulic oil out through the filtration of oil-suction oil filter 13 from fuel tank 11, by the first digital valve 21 and the first one-way valve 231, in the rodless cavity 241 of oil hydraulic cylinder 24, pass into hydraulic oil, make the piston rod 243 of this oil hydraulic cylinder 24 stretch out oil hydraulic cylinder, need to regulate the open-shut device of the valve of open-shut device aperture to promote to liquid chunnel direction, simultaneously, a part for the hydraulic oil flowing out from digital valve 21, the arm arranging on the connecting pipeline at the filler opening place by the first one-way valve 231, control port by the second one-way valve 232 flows into the second one-way valve 232, the spool of the second one-way valve 232 is backed down, make to flow out rod chamber 242 under the effect of the thrust that hydraulic oil that the hydraulic oil in the rod chamber 242 of oil hydraulic cylinder 24 passes in rodless cavity 241 produces, the oil outlet of the second one-way valve 232 being backed down by spool flows to filler opening, and flow in fuel tank 11 through the second digital valve 22 and return oil filter 14, thereby reach, reduce the object of aperture that the trip is the valve opening and closing element of straight line, reduced the size of the flow of the working medium that flows out from this valve.
When the second digital valve 22 energising that the rod chamber 242 to oil hydraulic cylinder 24 is connected, the second digital valve 22 commutations, oil pump 12 is extracted hydraulic oil out through the filtration of oil-suction oil filter 13 from fuel tank 11, by the second digital valve 22 and the second one-way valve 232, in the rod chamber 242 of oil hydraulic cylinder 24, pass into hydraulic oil, make, in the rod chamber 242 of piston rod 243 retraction oil hydraulic cylinders 24 of this oil hydraulic cylinder 24, need to regulate the open-shut device of the valve of open-shut device aperture to drag to piston rod 243 moving direction, simultaneously, a part for the hydraulic oil flowing out from the second digital valve 22, the arm arranging on the connecting pipeline at the filler opening place by the second one-way valve 232, control port by the first one-way valve 231 flows into the second one-way valve 232, the spool of the first one-way valve 231 is backed down, make to flow out rodless cavity 241 under the effect of the thrust that hydraulic oil that the hydraulic oil in the rodless cavity 241 of oil hydraulic cylinder 24 passes in rod chamber 242 produces, the oil outlet of the first one-way valve 231 being backed down by spool flows to filler opening, and flow in fuel tank 11 through the first digital valve 21 and return oil filter 14, thereby reach the object of the aperture that increases the valve opening and closing element that the trip is straight line, increased the size of the flow of the working medium flowing out from this valve.
When the working oil path 2 of the ratio control device for rectilinear path valve breaks down, open two position three way directional control valve 31, hydraulic oil enters two position three way directional control valve 31 through the filtration of oil-suction oil filter 13 by oil pump 12, hydraulic oil is entered in oil-feed Pilot operated check valve 32 and oil extraction Pilot operated check valve 33 by the control port of oil-feed Pilot operated check valve 32 and oil extraction Pilot operated check valve 33 respectively by a working oil chamber of two position three way directional control valve 31, and the spool of the spool of oil-feed Pilot operated check valve 32 and oil extraction Pilot operated check valve 33 is backed down.Because the spool of oil-feed Pilot operated check valve 32 is backed down, therefore the hydraulic oil in fuel tank 11 can filter by oil pump 12 through oil-suction oil filter 13, the oil-feed Pilot operated check valve 32 that spool is backed down flows in the rodless cavity 241 of oil hydraulic cylinder 24, because the hydraulic oil being filled with in rodless cavity 241 produces thrust to the piston of oil hydraulic cylinder 24, the oil extraction Pilot operated check valve 33 that hydraulic oil in the rod chamber 242 of oil hydraulic cylinder 24 can be backed down by spool, filtration through return filter 14, finally enter in fuel tank 11, the piston rod 243 of oil hydraulic cylinder 24 is stretched out, the open-shut device of valve is pushed to the bottom of liquid chunnel, make this valve closing, then the working oil path of the ratio control device for rectilinear path valve is detected and keeped in repair.
Because the flow of digital valve self is less, therefore when using digital valve to regulate valve opening and closing element aperture, adjustment process is consuming time longer, and when the open-shut device of rectilinear path valve need to be from larger opening to less regulation, if only depend on the first digital valve 21 to the mode that is filled with hydraulic oil in the rodless cavity 241 of oil hydraulic cylinder 24 during to the adjusting of rectilinear path valve opening and closing element, there will be situation of a specified duration consuming time, process is slower, even may follow-up work element be produced and be impacted.Therefore, in the time the open-shut device of rectilinear path valve need to being regulated from larger opening to less aperture, can first working oil path 2 be closed, use protection oil circuit 3 to be filled with hydraulic oil in the rodless cavity 241 of oil hydraulic cylinder 24, piston rod 243 is stretched out, the open-shut device of this rectilinear path valve is closed rapidly, again protection oil circuit 3 is closed, open working oil path 2, and to the second digital valve 22 energisings, make hydraulic oil through the second digital valve 22, the second one-way valve 232 enters in the rod chamber 242 of oil hydraulic cylinder 24, the aperture of rectilinear path valve opening and closing element is regulated since 0, saved the time spent when valve opening and closing element regulates from larger opening to less aperture, increased adjusting efficiency, and because the aperture of valve opening and closing element slowly increases from 0, the uninterrupted of the working medium by this rectilinear path valve is increased to setting value gradually, protected the safety in utilization of subsequent element.
Use the ratio control device for rectilinear path valve of the present invention, can be according to actual needs, by control to pass in oil hydraulic cylinder 24 hydraulic oil number come the piston rod 243 of regulator solution cylinder pressure 24 to stretch out length, and the length that piston rod 243 stretches out the intuitively scale value from piston rod 243 is read, then compare the entire length that stroke is the valve opening and closing element of straight line, can know that stroke is the aperture of the valve opening and closing element of straight line, the object that the aperture of the valve opening and closing element that to reach stroke be straight line regulates, and then can regulate the object of the uninterrupted of the working medium by valve, and this device is simple to operate, cost is low, and digital valve and overlapping double check valve hydraulic control valve is simple in structure, stain resistance is good, therefore it is comparatively easy to safeguard.And should be provided with protection oil circuit for the ratio control device of rectilinear path valve; in the situation that working oil path goes wrong; protection oil circuit is throttle down rapidly; avoid working medium flow in valve liquid chunnel excessive and follow-up work element is exerted an influence, guaranteed the normal operation of whole system.
Claims (6)
1. the ratio control device for rectilinear path valve, should comprise oil supply system and working oil path for the ratio control device of rectilinear path valve, described oil supply system comprises fuel tank and oil pump, and described oil pump extracts hydraulic oil from described fuel tank, thereby provides operation power to this device; Described working oil path comprises the digital valve of two two-position three ways, one group of overlapping double check valve hydraulic control valve and a single-rod piston formula oil hydraulic cylinder, and one end that described hydraulic cylinder piston rod is arranged on outside cylinder body is connected with regulating the open-shut device of the valve of open-shut device aperture; Wherein,
The first digital valve passes into hydraulic oil in order to the rodless cavity to described oil hydraulic cylinder, the oil suction chamber of described the first digital valve is connected with described fuel tank by described oil pump, between the filler opening of working oil chamber and the first one-way valve in described overlapping double check valve hydraulic control valve, by connecting pipeline, be communicated with, branch line is set on this connecting pipeline to be connected with the control port of the second one-way valve in described overlapping double check valve hydraulic control valve, for making a part of hydraulic oil of described the first digital valve working oil chamber outflow flow into the control port of the second one-way valve, the oil outlet of described the first one-way valve is connected with the rodless cavity of described oil hydraulic cylinder,
The second digital valve passes into hydraulic oil in order to the rod chamber to described oil hydraulic cylinder, the oil suction chamber of described the second digital valve is connected with described fuel tank by described oil pump, between the filler opening of working oil chamber and described the second one-way valve in described overlapping double check valve hydraulic control valve, by connecting pipeline, be communicated with, branch line is set on this connecting pipeline to be connected with the control port of described the first one-way valve, for making a part of hydraulic oil of described the second digital valve working oil chamber outflow flow into the control port of described the first one-way valve, the oil outlet of described the second one-way valve is connected with the rod chamber of described oil hydraulic cylinder.
2. the ratio control device for rectilinear path valve according to claim 1, it is characterized in that, this gate valve ratio control device also comprises a protection oil circuit, described protection oil circuit comprises a two position three way directional control valve and an oil-feed Pilot operated check valve, the oil suction chamber of described two position three way directional control valve is connected with described fuel tank by oil pump, a working oil chamber is communicated with by connecting pipeline with the control port of described oil-feed Pilot operated check valve, and another working oil chamber is connected with described fuel tank; The filler opening of described Pilot operated check valve is connected by connecting pipeline with the rodless cavity of described oil hydraulic cylinder, and oil outlet is connected by oil pump with described fuel tank.
3. the ratio control device for rectilinear path valve according to claim 2; it is characterized in that; described protection oil circuit is also provided with an oil extraction Pilot operated check valve; the control port of this oil extraction Pilot operated check valve is connected with the working oil chamber that described two position three way directional control valve is connected with the oil circuit control of described oil-feed Pilot operated check valve by connecting pipeline; the oil outlet of described oil extraction Pilot operated check valve is connected with the rod chamber of described oil hydraulic cylinder, and filler opening is connected with described fuel tank.
4. the ratio control device for rectilinear path valve according to claim 1, is characterized in that, is provided with the scale value that scale division value is 0.5mm on the piston rod of described oil hydraulic cylinder.
5. the ratio control device for rectilinear path valve according to claim 1, is characterized in that, on described fuel tank, is provided with oil-suction oil filter, and hydraulic oil enters described oil pump by described oil-suction oil filter.
6. the ratio control device for rectilinear path valve according to claim 1, is characterized in that, on described fuel tank, is provided with return oil filter, and the hydraulic oil that returns to described fuel tank flows into fuel tank by this return oil filter.
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| CN201410339767.7A CN104089078B (en) | 2014-07-16 | 2014-07-16 | For the proportion adjustment device of linear rows stroke valve |
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| CN201410339767.7A CN104089078B (en) | 2014-07-16 | 2014-07-16 | For the proportion adjustment device of linear rows stroke valve |
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| CN104089078B CN104089078B (en) | 2016-06-08 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156393A (en) * | 2015-09-30 | 2015-12-16 | 中国船舶重工集团公司第七一九研究所 | Low-noise integrated pneumatic valve |
| CN106402059A (en) * | 2016-12-26 | 2017-02-15 | 徐工集团工程机械有限公司 | Load port individual valve, hydraulic bus control system and engineering machinery |
| CN107605843A (en) * | 2017-10-12 | 2018-01-19 | 徐州徐工随车起重机有限公司 | A kind of electro-hydraulic leveling valve group of multifunctional working bucket |
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| CN107830001A (en) * | 2017-11-28 | 2018-03-23 | 湖南星邦重工有限公司 | A kind of scissor aerial work platform and its hydraulic system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110202232A1 (en) * | 2007-10-11 | 2011-08-18 | Jochen Busch | Hydraulic Lift System And Control Method |
| CN102221024A (en) * | 2011-08-22 | 2011-10-19 | 山东泰丰液压股份有限公司 | Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system |
| CN202484401U (en) * | 2012-03-26 | 2012-10-10 | 新华威尔液压系统(上海)有限公司 | Servo valve controller |
| CN202884205U (en) * | 2012-11-13 | 2013-04-17 | 济南大学 | Pneumatic control system for stepless regulation of opening of water-sealed valve |
| CN204083452U (en) * | 2014-07-16 | 2015-01-07 | 上海豪高机电科技有限公司 | For the ratio control device of rectilinear path valve |
-
2014
- 2014-07-16 CN CN201410339767.7A patent/CN104089078B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110202232A1 (en) * | 2007-10-11 | 2011-08-18 | Jochen Busch | Hydraulic Lift System And Control Method |
| CN102221024A (en) * | 2011-08-22 | 2011-10-19 | 山东泰丰液压股份有限公司 | Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system |
| CN202484401U (en) * | 2012-03-26 | 2012-10-10 | 新华威尔液压系统(上海)有限公司 | Servo valve controller |
| CN202884205U (en) * | 2012-11-13 | 2013-04-17 | 济南大学 | Pneumatic control system for stepless regulation of opening of water-sealed valve |
| CN204083452U (en) * | 2014-07-16 | 2015-01-07 | 上海豪高机电科技有限公司 | For the ratio control device of rectilinear path valve |
Cited By (13)
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|---|---|---|---|---|
| CN105156393A (en) * | 2015-09-30 | 2015-12-16 | 中国船舶重工集团公司第七一九研究所 | Low-noise integrated pneumatic valve |
| CN106402059A (en) * | 2016-12-26 | 2017-02-15 | 徐工集团工程机械有限公司 | Load port individual valve, hydraulic bus control system and engineering machinery |
| CN107605843A (en) * | 2017-10-12 | 2018-01-19 | 徐州徐工随车起重机有限公司 | A kind of electro-hydraulic leveling valve group of multifunctional working bucket |
| CN107830001B (en) * | 2017-11-28 | 2023-10-27 | 湖南星邦智能装备股份有限公司 | Scissor fork type aerial work platform and hydraulic system thereof |
| CN107795532A (en) * | 2017-11-28 | 2018-03-13 | 湖南星邦重工有限公司 | A kind of scissor aerial work platform and its floating hydraulic control system |
| CN107795535A (en) * | 2017-11-28 | 2018-03-13 | 湖南星邦重工有限公司 | A kind of scissor aerial work platform and its floating hydraulic control system |
| CN107830001A (en) * | 2017-11-28 | 2018-03-23 | 湖南星邦重工有限公司 | A kind of scissor aerial work platform and its hydraulic system |
| CN109404352A (en) * | 2018-12-17 | 2019-03-01 | 沈阳理工大学 | A kind of passive type automatic resisting applying mechanism and method |
| CN109404352B (en) * | 2018-12-17 | 2024-01-30 | 沈阳理工大学 | Passive automatic resistance applying mechanism and method |
| CN110864019A (en) * | 2019-11-28 | 2020-03-06 | 徐州海伦哲特种车辆有限公司 | Digital hydraulic leveling system of working platform of overhead working truck |
| CN112283961A (en) * | 2020-11-11 | 2021-01-29 | 上海电气液压气动有限公司 | Double-pump joint control solar photo-thermal tracking device |
| CN112283961B (en) * | 2020-11-11 | 2022-06-21 | 上海电气液压气动有限公司 | Double-pump joint control solar photo-thermal tracking device |
| CN114294556A (en) * | 2021-12-27 | 2022-04-08 | 上海华建开关有限公司 | Gas circulation protection low-voltage switch cabinet |
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