CN107725878B - A kind of stop valve and valve group - Google Patents
A kind of stop valve and valve group Download PDFInfo
- Publication number
- CN107725878B CN107725878B CN201710761009.8A CN201710761009A CN107725878B CN 107725878 B CN107725878 B CN 107725878B CN 201710761009 A CN201710761009 A CN 201710761009A CN 107725878 B CN107725878 B CN 107725878B
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- oil duct
- valve
- spool
- oil
- guide
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- 230000000694 effects Effects 0.000 claims description 5
- 239000002828 fuel tank Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 224
- 239000010720 hydraulic oil Substances 0.000 abstract description 17
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of stop valve and valve groups, belong to valve field.The stop valve includes valve body, spool and reset element, there is movable chamber in valve body, the first oil duct and the second oil duct are provided on valve body, the outer surface of first oil duct connection movable chamber and valve body, the outer surface of second oil duct connection movable chamber and valve body, the cross-sectional area of first oil duct is gradually reduced along the length direction of the first oil duct, when the flow in fluid pressure line increases suddenly, although the inlet of first guide's oil duct and the inlet of second guide's oil duct can all accelerate and pressure reduction due to hydraulic oil flow rate, but since cross-sectional area of this in the first oil duct at two differs, the pressure difference generated between two is bigger, change so as to cause bigger pressure difference is generated between the outlet of first guide's oil duct and the outlet of second guide's oil duct, quickly push spool mobile, disconnect the first oil duct and the second oil duct, interrupt oil circuit, it improves and cuts The sensitivity of disconnected valve, accelerates the movement speed of spool.
Description
Technical field
The present invention relates to valve field, in particular to a kind of stop valve and valve group.
Background technique
Stop valve is a kind of for cutting off the valve member of oil circuit.
There is a kind of stop valve that there is first guide's oil duct and second guide's oil duct at present, wherein one end of first guide's oil duct
It is connected to the oil inlet of stop valve, the other end is then connected to the movable chamber of setting spool, one end of second guide's oil duct and cutting
The oil outlet of valve is connected to, and the other end is also connected to movable chamber.Spool can be acted in first guide's oil duct, second guide's oil duct
It pressure difference on spool and is moved under the action of the elastic force of reset spring, to realize the turn-on and turn-off of stop valve.
This stop valve at work, when the flow of the hydraulic oil in fluid pressure line is lower, make in reset spring by spool
With lower opening, allow hydraulic oil by stop valve, and when the flow of the hydraulic oil in fluid pressure line increases to certain journey suddenly
When spending, it can increase due to the pressure difference between first guide's oil duct and second guide's oil duct, make spool quick closedown, oil circuit is cut
It is disconnected.But existing stop valve is not sensitive enough, the response speed of spool is not fast enough, is not able to satisfy some more demanding hydraulic tubes
Road.
Summary of the invention
It is not sensitive enough in order to solve existing stop valve, not fast enough the problem of the response speed of spool, the embodiment of the present invention
Provide a kind of stop valve and valve group.The technical solution is as follows:
The embodiment of the invention provides a kind of stop valve, the stop valve includes valve body, spool and reset element, the valve
There is movable chamber in vivo, the first oil duct and the second oil duct are provided on the valve body, first oil duct is connected to the movable chamber
With the outer surface of the valve body, second oil duct is connected to the outer surface of the movable chamber Yu the valve body, first oil duct
Cross-sectional area be gradually reduced along the length direction of first oil duct, and lesser one end of cross-sectional area of first oil duct
It is connected to the movable chamber, first guide's oil duct and second guide's oil duct, first guide oil is additionally provided on the valve body
The entrance in road is connected to biggish one end of cross-sectional area of first oil duct, the outlet and the work of the first guide oil duct
Dynamic chamber connection, the entrance of the second guide oil duct are connected to lesser one end of cross-sectional area of first oil duct, and described the
The outlet of two guide's oil ducts is connected to the movable chamber,
The spool is movably arranged in the movable chamber, and the spool be located at the first guide oil duct outlet and
Between the outlet of the second guide oil duct, communicating passage is provided on the spool, the spool can be under external force
It moves between the first position and the second position, when the spool is located at the first position, the communicating passage is connected to institute
The first oil duct and second oil duct are stated, when the spool is located at the second position, the communicating passage and described first
Oil duct and second oil duct disconnect,
The reset element is arranged between the spool and the inner wall of the movable chamber, is used to provide the described spool to institute
State the external force of first position sliding.
Preferably, the valve body includes ontology and valve deck, and the valve deck is detachably connected with the ontology, the ontology and
The valve deck surrounds the movable chamber.
Preferably, the reset element is arranged between the spool and the valve deck.
Further, limiting slot is provided on the valve deck, the reset element is arranged in the limiting slot.
Preferably, the spool is cylindrical, the axial direction of the activity direction of the spool along the spool.
Preferably, the cross section of first oil duct and second oil duct is circle.
Optionally, the valve body includes ontology and refill-unit, and plug-in opening is provided on the ontology, and the refill-unit is removable
It is inserted into unloading in the plug-in opening, first oil duct is arranged on the refill-unit.
Preferably, the stop valve includes multiple refill-units, the cross at the both ends of the first oil duct of the different refill-units
The ratio of sectional area is unequal.
Further, the outer wall close to the ontology of the plug-in opening is arranged in the entrance of the first guide oil duct
One end.
On the other hand, the embodiment of the invention also provides a kind of valve group, the valve group includes inserted valve and stop valve, described
Stop valve is any stop valve above-mentioned, has oil inlet, oil outlet and control port on the inserting valve housing, described
The spool of inserted valve is arranged in the inserting valve housing, and the spool of the inserted valve and the inserting valve housing surround bullet
Spring chamber, the control port are connected to the spring cavity, spring are provided in the spring cavity, the spool of the inserted valve can
It is moved under the pressure in the pressure of the oil inlet, the elastic force of the spring and the spring cavity, when the bullet of the spring
When the sum of pressure in power and the spring cavity is less than the pressure of the oil inlet, the oil inlet is connected to the oil outlet,
When the sum of the pressure in the elastic force of the spring and the spring cavity is greater than the pressure of the oil inlet, the oil inlet and institute
Oil outlet disconnection is stated, the control port of the inserted valve and biggish one end of cross-sectional area of the first oil duct of the stop valve connect
Logical, the second oil duct of the stop valve with fuel tank for being connected to.
Technical solution provided in an embodiment of the present invention have the benefit that by be arranged on valve body the first oil duct,
Second oil duct and movable chamber, spool are movably arranged in movable chamber, so as to pass through the first oil of mobile communication of control valve core
Road and the second oil duct, by way of the first oil duct to be arranged to cross-sectional area and is gradually reduced along its length, and the first oil duct
The lesser one end of cross-sectional area be connected to movable chamber, first guide's oil duct and second guide's oil duct are set on valve body, by
The entrance of one guide's oil duct is connected to the biggish one end of the cross-sectional area of the first oil duct, by the entrance and first of second guide's oil duct
The connection of the cross-sectional area of oil duct lesser one end, at the same first guide's oil duct outlet and second guide's oil duct outlet with work
Dynamic chamber connection, spool is located between the outlet of first guide's oil duct and the outlet of second guide's oil duct, so that passing through in hydraulic oil
When the first oil duct, it is located at the second guide since in the first oil duct, the cross-sectional area positioned at the inlet of first guide's oil duct is greater than
Cross-sectional area at oil-passage inlet, so that the hydraulic oil flow rate of the inlet of first guide's oil duct is relatively slow, pressure is larger, from
And there are pressure differences between the outlet of first guide's oil duct and the outlet of second guide's oil duct, simultaneously because being additionally provided with for pushing
The mobile reset element of spool, spool are connected to the first oil duct and the second oil duct under the action of pressure difference is with reset element, and oil circuit is smooth
It is logical.And when the flow in fluid pressure line increases suddenly, although the inlet of first guide's oil duct and second guide's oil duct enter
Mouthful place all can the pressure reduction due to the quickening of hydraulic oil flow rate, but since cross-sectional area of this in the first oil duct at two differs,
The pressure difference generated between two is bigger, generates so as to cause between the outlet of first guide's oil duct and the outlet of second guide's oil duct
Bigger pressure difference variation, quickly pushes spool mobile, disconnects the first oil duct and the second oil duct, interrupt oil circuit, improve
The sensitivity of stop valve, accelerates the movement speed of spool.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of existing stop valve；
Fig. 2 is a kind of structure chart of stop valve provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another stop valve provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another stop valve provided in an embodiment of the present invention；
Fig. 5 is the pressure difference comparison diagram of stop valve provided in an embodiment of the present invention Yu existing stop valve；
Fig. 6 is a kind of structural schematic diagram of valve group provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
In order to better understand the present invention, simply a kind of existing stop valve is illustrated herein:
Fig. 1 is a kind of structural schematic diagram of existing stop valve, as shown in Figure 1, the stop valve includes valve body 11 and activity
Spool 12 in valve body is set, first guide's oil duct 13 and second guide's oil duct 14, the first guide oil are provided on valve body 11
The entrance in road 13 is connected to the oil inlet of stop valve, the outlet of first guide's oil duct 13 and the one of the movable chamber 15 of setting spool 12
End connection, the entrance of second guide's oil duct 14 are connected to the entrance of stop valve, the outlet and movable chamber 15 of second guide's oil duct 14
Other end connection, spool 12 is located between the outlet of first guide's oil duct 13 and the outlet of second guide's oil duct 14, movable chamber
It is additionally provided with spring 16 in 15, to push spool 12, stop valve is connected.The condition that stop valve is opened is the position of movable chamber 15
The sum of elastic force of pressure at one end of the outlet of second guide's oil duct 14 and spring 16 is located at the not less than movable chamber 15
Pressure at one end of the outlet of one guide's oil duct 13.The mobile pressure change by first guide's oil duct 13 of spool 12,
When the flow in fluid pressure line increases, the pressure at one end of the outlet positioned at first guide's oil duct 13 of movable chamber 15 can increase
Greatly, it will push spool 12 when increasing to a certain extent, make to cut off valve breakdown.
Fig. 2 is a kind of structure chart of stop valve provided in an embodiment of the present invention, as shown in Fig. 2, the stop valve includes valve body
21, spool 22 and reset element 26.
There is movable chamber 25 in valve body 21, the first oil duct 2111 and the second oil duct 2112, the first oil are provided on valve body 21
Road 2111 is connected to the outer surface of movable chamber 25 and valve body 21, and the second oil duct 2112 is connected to the outer surface of movable chamber 25 and valve body 21,
The cross-sectional area of first oil duct 2111 is gradually reduced along the length direction of the first oil duct 2111, and the cross section of the first oil duct 2111
The lesser one end of product is connected to movable chamber 25.First guide's oil duct 23 and second guide's oil duct 24 are additionally provided on valve body 21, the
The entrance of one guide's oil duct 23 is connected to biggish one end of cross-sectional area of the first oil duct 2111, the outlet of first guide's oil duct 23
It being connected to movable chamber 25, the entrance of second guide's oil duct 24 is connected to lesser one end of cross-sectional area of the first oil duct 2111, the
The outlet of two guide's oil ducts 24 is connected to movable chamber 25.
Spool 22 is movably arranged in movable chamber 25, and spool 22 is located at outlet and the second guide of first guide's oil duct 23
Between the outlet of oil duct 24, communicating passage 221 is provided on spool 22.Fig. 3 is another cutting provided in an embodiment of the present invention
The structural schematic diagram of valve, in conjunction with shown in Fig. 2 and Fig. 3, spool 22 can under external force first position and the second position it
Between move.When spool 22 is located at first position, communicating passage 221 is connected to the first oil duct 2111 and the second oil duct 2112, works as valve
When core 22 is located at the second position, communicating passage 221 and the first oil duct 2111 and the second oil duct 2112 are disconnected.
Reset element 26 is arranged between spool 22 and the inner wall of movable chamber 25, sliding to first position for providing spool 22
Dynamic external force.
The embodiment of the present invention is movably arranged on by the way that the first oil duct, the second oil duct and movable chamber, spool are arranged on valve body
In movable chamber, so as to pass through the first oil duct of mobile communication and the second oil duct of control valve core, by the way that the first oil duct is arranged
The form being gradually reduced along its length at cross-sectional area, and lesser one end of cross-sectional area of the first oil duct and movable chamber connect
It is logical, first guide's oil duct and second guide's oil duct are set on valve body, by the cross of the entrance of first guide's oil duct and the first oil duct
The biggish one end connection of sectional area, the entrance of second guide's oil duct is connected to the lesser one end of the cross-sectional area of the first oil duct,
The outlet of first guide's oil duct simultaneously and the outlet of second guide's oil duct are connected to movable chamber, and spool is located at first guide's oil duct
Outlet and second guide's oil duct outlet between so that hydraulic oil pass through the first oil duct when, due to being located in the first oil duct
The cross-sectional area of the inlet of first guide's oil duct is greater than the cross-sectional area positioned at second guide's oil duct inlet, so that first is first
The hydraulic oil flow rate of the inlet in Oil Guide road is relatively slow, and pressure is larger, thus outlet and the second guide of first guide's oil duct
There are pressure differences between the outlet of oil duct, simultaneously because being additionally provided with the reset element for pushing spool mobile, spool is in pressure difference
The first oil duct and the second oil duct are connected to under the action of reset element, oil circuit is unimpeded.And the flow in fluid pressure line increases suddenly
When big, although the inlet of first guide's oil duct and the inlet of second guide's oil duct can all be pressed since hydraulic oil flow rate is accelerated
Power reduces, but since cross-sectional area of this in the first oil duct at two differs, the pressure difference generated between two is bigger, so as to cause
Bigger pressure difference variation is generated between the outlet of first guide's oil duct and the outlet of second guide's oil duct, quickly spool is pushed to move
It is dynamic, the first oil duct and the second oil duct are disconnected, oil circuit is interrupted, the sensitivity of stop valve is improved, accelerates spool
Movement speed.
As shown in Fig. 2, the first oil duct 2111 and the second oil duct 2112 can be coaxially set.
When realization, valve body 21 may include ontology 211 and valve deck 212, and valve deck 212 is detachably connected with ontology 211, ontology
211 and valve deck 212 surround movable chamber 25, in this way can be in order to spool 22 be placed into movable chamber 25.
As shown in Fig. 2, reset element 26 can be set between spool 22 and valve deck 212, to be pushed away by reset element 26
Movable valve plug 22 is mobile.
Further, limiting slot 2121 can be set on valve deck 212, reset element 26 is arranged in limiting slot 2121.
By setting limiting slot 2121 not only can in order to reset element 26 installation but also spool 22 can be made when moving, avoid spool 22
Reset element 26 is compressed in transition, and reset element 26 is enable to be contained in limiting slot 2121.When realization, reset element 26 be can be
Spring.
Preferably, spool 22 can be cylindrical, axial direction of the activity direction of spool 22 along spool 22, columned spool
22 are more easily moved, and spool 22 is avoided to occur clamping stagnation in moving process.
It is contemplated that movable chamber 25 is also to be cylindric, so that the outer wall of spool 22 when spool 22 is cylindric
Movable sealing can be formed with the inner wall of movable chamber 25.
In other embodiments, spool 22 is also possible to prism-shaped.
Preferably, the cross section of the first oil duct 2111 and the second oil duct 2112 can be circle.Circular runner is set
It can be conducive to reduce resistance, keep the flowing of hydraulic oil more stable.
As shown in Fig. 2, the second oil duct 2112 can be arranged to shape identical with the first oil duct 2111.
Fig. 4 is the structural schematic diagram of another stop valve provided in an embodiment of the present invention, for ease of description, in Fig. 4 slightly
Spool and reset element are removed, as shown in figure 4, the valve body 21 of the stop valve includes ontology 211 and refill-unit 30, on ontology 211
It is provided with plug-in opening 2113, refill-unit 30 is removably inserted into plug-in opening 2113, and the first oil duct 2111 is arranged in refill-unit
On 30.Since the first oil duct 2111 is arranged on refill-unit 30, and refill-unit 30 is detachably connected with ontology 211, in this way can be with
Convenient for being processed to the first oil duct 2111, to process the first oil duct 2111 of suitable shape.
It is contemplated that a side opening 301 is provided on refill-unit 30, to be connected to second guide's oil duct 24.
When realization, refill-unit 30 can be a tubular member, and the inner hole of refill-unit 30 is in the form of the big other end in one end is small.
Plug-in opening 2113 can be set to cylinder, in order to the installation of refill-unit 30.
Preferably, stop valve may include multiple refill-units 30, the both ends of the first oil duct 2111 of different refill-units 30
Cross-sectional area ratio it is unequal.It in this way can be by replacing different refill-units 30 so that stop valve meets different need
It wants.
As shown in figure 4, the outer wall of the close ontology 211 that plug-in opening 2113 can be arranged in entrance of first guide's oil duct 23
One end.After refill-unit 30 is inserted into plug-in opening 2113, refill-unit 30 exposes the entrance of first guide's oil duct 23, in order to liquid
Pressure oil flows into first guide's oil duct 23.
Preferably, the opening positioned at ontology 211 of plug-in opening 2113 is in horn-like, in this way can be in order to refill-unit 30
Installation.
As shown in figure 4, refill-unit 30 is also possible to the tubular member that an inner hole is in big at both ends and small in middle, refill-unit 30 is inserted
In ontology 211, and run through movable chamber 25.It is provided with opening 302 on the side wall of refill-unit 30, is inserted into this way by refill-unit 30
After into ontology 211, spool 22 can pass through opening 302 and move in movable chamber 25.Between being formed between opening 302 and spool 22
Gap sealing, can make being more firmly mounted for refill-unit 30 in this way, refill-unit 30 is avoided to loosen.
Fig. 5 is the pressure difference comparison diagram of stop valve provided in an embodiment of the present invention Yu existing stop valve, and abscissa indicates in Fig. 5
Flow, unit L/min, ordinate indicate the pressure difference of spool two sides, selected cutting of the invention in unit bar, Fig. 5
The structure of valve is referred to Fig. 2, and the first oil duct 2111 is 10mm, the first oil with the diameter of first guide's oil duct, 23 connectivity part
Road 2111 is 8mm with the diameter of second guide's oil duct, 24 connectivity part, the structure of the stop valve of the selected prior art in Fig. 5
It is referred to Fig. 1, the diameter of oil inlet is 10mm.The pressure difference of spool two sides can be obtained by experiment measurement or theoretical calculation
It arrives, available according to chart, in the identical situation of flow, the pressure difference of the spool two sides of stop valve provided by the present invention is more
Greatly, the spool of stop valve provided by the present invention under the differential pressure action of spool two sides movement speed faster, and in changes in flow rate,
The pressure difference amplitude of variation of the spool two sides of stop valve provided by the present invention is bigger, therefore stop valve provided by the present invention is cleverer
It is quick.
Fig. 6 is a kind of structural schematic diagram of valve group provided in an embodiment of the present invention, as shown in fig. 6, valve group includes inserted valve
51 and stop valve 52, the stop valve 52 can be Fig. 2~stop valve shown in Fig. 4, the control port of inserted valve 51 and stop valve
The biggish one end connection of the cross-sectional area of 52 the first oil duct 2111.
The embodiment of the present invention is movably arranged on by the way that the first oil duct, the second oil duct and movable chamber, spool are arranged on valve body
In movable chamber, so as to pass through the first oil duct of mobile communication and the second oil duct of control valve core, by the way that the first oil duct is arranged
The form being gradually reduced along its length at cross-sectional area, and lesser one end of cross-sectional area of the first oil duct and movable chamber connect
It is logical, first guide's oil duct and second guide's oil duct are set on valve body, by the cross of the entrance of first guide's oil duct and the first oil duct
The biggish one end connection of sectional area, the entrance of second guide's oil duct is connected to the lesser one end of the cross-sectional area of the first oil duct,
The outlet of first guide's oil duct simultaneously and the outlet of second guide's oil duct are connected to movable chamber, and spool is located at first guide's oil duct
Outlet and second guide's oil duct outlet between so that hydraulic oil pass through the first oil duct when, due to being located in the first oil duct
The cross-sectional area of the inlet of first guide's oil duct is greater than the cross-sectional area positioned at second guide's oil duct inlet, so that first is first
The hydraulic oil flow rate of the inlet in Oil Guide road is relatively slow, and pressure is larger, thus outlet and the second guide of first guide's oil duct
There are pressure differences between the outlet of oil duct, simultaneously because being additionally provided with the reset element for pushing spool mobile, spool is in pressure difference
The first oil duct and the second oil duct are connected to under the action of reset element, oil circuit is unimpeded.And the flow in fluid pressure line increases suddenly
When big, although the inlet of first guide's oil duct and the inlet of second guide's oil duct can all be pressed since hydraulic oil flow rate is accelerated
Power reduces, but since cross-sectional area of this in the first oil duct at two differs, the pressure difference generated between two is bigger, so as to cause
Bigger pressure difference variation is generated between the outlet of first guide's oil duct and the outlet of second guide's oil duct, quickly spool is pushed to move
It is dynamic, the first oil duct and the second oil duct are disconnected, oil circuit is interrupted, the sensitivity of stop valve is improved, accelerates spool
Movement speed.
When in use, the A mouth oil inlet of inserted valve 51, B mouthfuls fuel-displaced, and the second oil duct 2112 of stop valve 52 can be with fuel tank 53
Connection.When A mouthfuls with certain flow oil inlet, spring 511 is compressed to a certain degree, and the main valve plug of inserted valve 51 is opened, hydraulic oil
It is flowed out from B mouthfuls.When fluctuating in pipeline, when flow increases suddenly, the main valve plug Fast Compression spring of inserted valve 51 makes spring
Hydraulic oil in chamber 512 is quickly discharged, and stop valve 52 immediately closes off, and the oil circuit between spring cavity 512 and fuel tank is turned off, is made
Hydraulic oil in spring cavity 512 can not continue to be discharged, and the main valve plug of inserted valve 51 stops movement, maintain the aperture of main valve plug 22
It is constant.When fluctuating stopping, due to the pressure decline in spring cavity 512, stop valve 52 restores conducting again.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of stop valve, which is characterized in that the stop valve includes valve body (21), spool (22) and reset element (26), institute
Stating in valve body (21) has movable chamber (25), is provided with the first oil duct (2111) and the second oil duct on the valve body (21)
(2112), first oil duct (2111) is connected to the outer surface of the movable chamber (25) and the valve body (21), second oil
Road (2112) is connected to the outer surface of the movable chamber (25) and the valve body (21), the cross-sectional area of first oil duct (2111)
Length direction along first oil duct (2111) is gradually reduced, and the cross-sectional area lesser one of first oil duct (2111)
End is connected to the movable chamber (25), and first guide's oil duct (23) and second guide's oil duct are additionally provided on the valve body (21)
(24), the entrance of the first guide oil duct (23) is connected to biggish one end of cross-sectional area of first oil duct (2111),
The outlet of the first guide oil duct (23) is connected to the movable chamber (25), the entrance of the second guide oil duct (24) and institute
State the lesser one end connection of cross-sectional area of the first oil duct (2111), the outlet and the activity of the second guide oil duct (24)
Chamber (25) connection,
The spool (22) is movably arranged in the movable chamber (25), and the spool (22) is located at the first guide oil duct
(23) between the outlet of outlet and the second guide oil duct (24), communicating passage (221) are provided on the spool (22),
The spool (22) can move between the first position and the second position under external force, when the spool (22) are located at institute
When stating first position, the communicating passage (221) is connected to first oil duct (2111) and second oil duct (2112), works as institute
When stating spool (22) and being located at the second position, the communicating passage (221) and first oil duct (2111) and described second
Oil duct (2112) disconnects,
The reset element (26) is arranged between the spool (22) and the inner wall of the movable chamber (25), is used to provide the described
The external force of spool (22) first position Xiang Suoshu sliding.
2. stop valve according to claim 1, which is characterized in that the valve body (21) includes ontology (211) and valve deck
(212), the valve deck (212) is detachably connected with the ontology (211), and the ontology (211) and the valve deck (212) surround
The movable chamber (25).
3. stop valve according to claim 2, which is characterized in that the reset element (26) is arranged in the spool (22)
Between the valve deck (212).
4. stop valve according to claim 3, which is characterized in that limiting slot (2121) are provided on the valve deck (212),
The reset element (26) is arranged in the limiting slot (2121).
5. stop valve according to claim 1, which is characterized in that the spool (22) is cylindrical, the spool (22)
Activity direction along the spool (22) axial direction.
6. stop valve according to claim 1, which is characterized in that first oil duct (2111) and second oil duct
(2112) cross section is circle.
7. stop valve according to claim 1, which is characterized in that the valve body (21) includes ontology (211) and refill-unit
(30), it is provided with plug-in opening (2113) on the ontology (211), the refill-unit (30) is removably inserted into the plug-in opening
(2113) in, first oil duct (2111) is arranged on the refill-unit (30).
8. stop valve according to claim 7, which is characterized in that the stop valve includes multiple refill-units (30), different
The refill-unit (30) the first oil duct (2111) both ends cross-sectional area ratio it is unequal.
9. stop valve according to claim 7, which is characterized in that the entrance of the first guide oil duct (23) is arranged in institute
State one end of the outer wall close to the ontology (211) of plug-in opening (2113).
10. a kind of valve group, which is characterized in that the valve group includes inserted valve (51) and stop valve (52), the stop valve (52)
For stop valve according to any one of claims 1 to 9, there is oil inlet, oil outlet and control on the shell of the inserted valve (51)
The spool of liquefaction mouth, the inserted valve (51) is arranged in the shell of the inserted valve (51), the spool of the inserted valve (51)
Spring cavity (512) are surrounded with the shell of the inserted valve (51), the control port is connected to the spring cavity (512), described
It is provided with spring (511) in spring cavity (512), the spool of the inserted valve (51) can be in the pressure, described of the oil inlet
Moved under the elastic force of spring (511) and the pressure in the spring cavity (512), when the spring (511) elastic force with it is described
When the sum of pressure in spring cavity (512) is less than the pressure of the oil inlet, the oil inlet is connected to the oil outlet, works as institute
When the sum of the elastic force for stating spring (511) and the pressure in the spring cavity (512) are greater than the pressure of the oil inlet, the oil inlet
Mouth is disconnected with the oil outlet, the first oil duct (2111) of the control port and stop valve (52) of the inserted valve (51)
The biggish one end connection of cross-sectional area, the second oil duct (2112) of the stop valve (52) with fuel tank (53) for being connected to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710761009.8A CN107725878B (en) | 2017-08-30 | 2017-08-30 | A kind of stop valve and valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710761009.8A CN107725878B (en) | 2017-08-30 | 2017-08-30 | A kind of stop valve and valve group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725878A CN107725878A (en) | 2018-02-23 |
| CN107725878B true CN107725878B (en) | 2019-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710761009.8A Active CN107725878B (en) | 2017-08-30 | 2017-08-30 | A kind of stop valve and valve group |
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| Country | Link |
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| CN (1) | CN107725878B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113431924A (en) * | 2021-01-08 | 2021-09-24 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of preventing displacement of actuating element |
| CN114110216A (en) * | 2021-12-02 | 2022-03-01 | 西安航空制动科技有限公司 | A shut-off valve for a brake control system and an oil circuit control method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2320491C3 (en) * | 1973-04-21 | 1980-10-09 | Klaus Ing.(Grad.) 7060 Schorndorf Huegler | Two-way switch valve |
| GB2115905B (en) * | 1982-02-27 | 1985-06-19 | Chubb Fire Security Ltd | Pressure-controlled valve |
| CN1300499C (en) * | 2003-12-25 | 2007-02-14 | 宁波华液机器制造有限公司 | Ratio pressure difference control valve |
| DE112007003560T5 (en) * | 2007-07-02 | 2010-05-20 | Parker Hannifin Ab | Fluid valve assembly |
| CN201461583U (en) * | 2009-07-15 | 2010-05-12 | 宁波汉商液压有限公司 | Hydraulic valve for controlling pilot pressure |
| CN205639147U (en) * | 2016-05-25 | 2016-10-12 | 赫斯可液压(上海)有限公司 | Electric proportional pressure control flow structure |
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2017
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| CN107725878A (en) | 2018-02-23 |
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