CN107084277A - The buffering type pilot automatic valve triggered based on strut buckling - Google Patents
The buffering type pilot automatic valve triggered based on strut buckling Download PDFInfo
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- CN107084277A CN107084277A CN201710521589.3A CN201710521589A CN107084277A CN 107084277 A CN107084277 A CN 107084277A CN 201710521589 A CN201710521589 A CN 201710521589A CN 107084277 A CN107084277 A CN 107084277A
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- valve
- push rod
- switch
- guide
- piston
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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
- F16K31/122—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
- 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
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
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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
- F15B15/26—Locking mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to automatic control technology field, and in particular to a kind of buffering type pilot automatic valve triggered based on strut buckling.It includes being installed on the switch valve on pipeline, and the valve rod of the switch valve is connected with switch executive mechanism；Strut buckling guide's trigger mechanism is provided with the pipeline of the switch valve upstream；When unstability bending occurs for the depression bar of the strut buckling guide trigger mechanism, the switch executive mechanism action is triggered, and then the switch executive mechanism controls the switch valve to open or close；The switch executive mechanism is provided with pressure buffer mechanism.The present invention is stable and reliable in work, can reduce the impulsive force that valve opens or closes moment, service life of equipment is stabilized and increased beneficial to system pressure.
Description
Technical field
The invention belongs to automatic control technology field, and in particular to a kind of to be automatically turned on when pressure exceedes setting value
Or the valve closed.
Background technology
In order to protect pressure pipeline, pressure vessel and the device and equipment of their upstream and downstream, it is often necessary to be arranged on super
The valve that can be automatically turned on or close under pressure operating mode.In conventional practice, pressure pipe is detected usually using pressure transmitter
Pressure in road or pressure vessel, pressure transmitter outputs signal to control system, when pressure exceedes setting value, control system
System, which can send instruction automatically, makes valve opening or closing.
Realize the main potential risk of automatic open close valve under superpressure operating mode jointly using pressure transmitter and control system
It is, if pressure transmitter fails, the either signal transmission between pressure transmitter and control system goes wrong or controlled
Signal transmission between system processed and valve goes wrong, it is possible to pressure occurs and alreadys exceed setting value, and valve is but not as scheduled
The situation of action, is threatened to the device and equipment belt of pressure pipeline, pressure vessel and their upstream and downstream, is unfavorable for production peace
Full stable operation.
Thus, type pilot automatic valve obtains increasingly extensive use.Also there is following technology in existing type pilot automatic valve
Problem：
(1) when valve does closing motion, the instant impact that one side valve is subject to can be larger, easily causes in valve
Parts damages, are unfavorable for improving the service life of valve, are not on the other hand buffered because valve event is too fast, can cause system
Pressure fluctuating in inner is excessive, is unfavorable for system pressure stable.
(2) valve switch executing agency is when completion execution order needs to reset again, due to the spring in executing agency
Thrust is larger, causes hand-reset difficult, wastes time and energy.
The content of the invention
In order to solve the above-mentioned technical problem, it is an object of the invention to provide a kind of buffering elder generation triggered based on strut buckling
Conductivity type automatic valve, it is not only stable and reliable in work, and can realize that valve is slowly acted, so as to reduce valve open or
The impulsive force of turn-off transient.
To realize above-mentioned technical purpose, the present invention uses following technical scheme：
The buffering type pilot automatic valve triggered based on strut buckling, including the switch valve being installed on pipeline, the switch
The valve rod of valve is connected with switch executive mechanism；Strut buckling guide triggering machine is provided with the pipeline of the switch valve upstream
Structure；When unstability bending occurs for the depression bar of the strut buckling guide trigger mechanism, the switch executive mechanism action is triggered, and then
The switch executive mechanism controls the switch valve to open or close；The switch executive mechanism is provided with pressure buffer mechanism.
Preferably, the switch executive mechanism includes being slidably fitted with push rod in cylinder body, the cylinder body, the push rod is remote
One end from the strut buckling guide trigger mechanism is connected with execution piston, is set between the execution piston and the cylinder body
There is compression spring；The shift fork for being provided with and being connected with the valve rod, the band when push rod moves along a straight line are hinged on the push rod
Move the shift fork and then change the valve position state of the switch valve；The push rod is close to the strut buckling guide trigger mechanism
The cylinder body is stretched out in one end, and lockable mechanism is provided between the push rod and the strut buckling guide trigger mechanism.
Preferably, the pressure buffer mechanism includes the buffering gas set between the cylinder body and the execution piston
The blast pipe being connected with the buffering air cavity is provided with chamber, the cylinder body.
Preferably, being provided with regulating valve on the blast pipe.
As one of preferred scheme, the strut buckling guide trigger mechanism includes guide valve blocks, the pilot valve
First chamber and second chamber are divided into by diaphragm or piston in vivo, first chamber is by upstream pressure guiding pipe with being located at the switch
The pipeline of valve upstream is connected, and the push rod being connected with the diaphragm or piston is slidably fitted with the guide valve blocks, described
The guide valve blocks are stretched out at the two ends of push rod respectively, and the one end of the push rod away from the push rod is connected with frizzen；The lock
Locking mechanism is arranged between the push rod and the push rod；
When pressure exceedes setting value in first chamber, unstability bending occurs for the frizzen, now the lockable mechanism
Release and the switch executive mechanism is limited, the piston that performs acts on lower compression and to described in the elastic potential energy of compression spring
The movement of air cavity direction is buffered, and then drives shift fork action switch valve is changed into improper valve position by normal valve position by push rod.
As another preferred scheme, the strut buckling guide trigger mechanism includes guide valve blocks, the guide valve blocks
Interior to be divided into first chamber and second chamber by diaphragm or piston, first chamber is by upstream pressure guiding pipe with being located at the switch valve
The pipeline of upstream is connected, and second chamber is connected by downstream pressure guiding pipe with the pipeline positioned at the switch valve downstream；It is described
The push rod being connected with the diaphragm or piston is slidably fitted with guide valve blocks, the elder generation is stretched out at the two ends of the push rod respectively
Pilot valve body, the one end of the push rod away from the push rod is connected with frizzen；The lockable mechanism is arranged at the push rod and institute
State between push rod；
When the pressure differential of first chamber and second chamber exceedes setting value, unstability bending occurs for the frizzen, now
The lockable mechanism, which is released, to be limited the switch executive mechanism, and the piston that performs is under the elastic potential energy effect of compression spring
Oppress and simultaneously moved to the buffering air cavity direction, and then it is non-by push rod to drive shift fork action switch valve is changed into by normal valve position
Normal valve position.
Preferably, the lockable mechanism includes the push rod limiting plate being arranged on the push rod and is arranged at the top
Rocking arm on bar opens plate, and the both sides of the push rod limiting plate are respectively arranged with locking rocking arm；The switch valve is in normal valve
During position, the rocking arm opens plate and limits two locking rocking arms in open configuration, and two locking rocking arms limit push rod limiting plates
Position.
Preferably, the buffering type pilot automatic valve triggered based on strut buckling, in addition to push rod resetting-mechanism.
Preferably, the push rod resetting-mechanism is hydraulic pressure resetting-mechanism, what it included being fixedly installed on the cylinder body leads
To set, be slidably installed return piston in the guide sleeve, and one end of the return piston is provided with Hynautio-steering, described
The other end of return piston is connected with release link.
Preferably, indent is provided with the dashpot being adapted to the guide sleeve, the dashpot on the execution piston
It is connected with the buffering air cavity.
Due to using above-mentioned technical proposal, the present invention has at least following beneficial effect：
(1) because switch executive mechanism is provided with pressure buffer mechanism, when valve is closed under compression spring effect, delay
The air pressure of qi of chong channel ascending adversely intracavitary is raised there is provided reverse cushion effect, so as to so that valve slowly closing, reduces valve turn-off transient
Impulsive force, not only beneficial to the service life of extension valve, and ensure that the slow stable regulation of system pressure.By adjusting regulation
The aperture of valve, can adjust the speed of releasing of buffering gas intracavity gas, so as to adjust the closing velocity of valve.
(2) push rod resetting-mechanism is resetted using hydraulic pressure, after compression spring release elastic potential energy completes to perform order, is resetted
Even if during compression spring compression bounce it is very big, can also realize hand-hydraulic reset.
(3) by setting upstream pressure guiding pipe and downstream pressure guiding pipe, the both sides of diaphragm or piston are experienced on switch valve respectively
Trip and the pressure in downstream so that the trigger force of strut buckling guide's trigger mechanism is the pressure differential of upstream and downstream, and not only
It is upstream pressure, system is more reliable and more stable.
(4) when strut buckling guide trigger mechanism uses diaphragm structure, increase compression area, while compared to piston
Dynamic sealing is become static seal by structure, diaphragm, it is therefore prevented that leakage；And when pressure exceedes setting value, action response is fast, anti-
Should be sensitive, it is particularly suitable for use in the higher low pressure occasion of pressure controling precision requirement, triggering sensitivity and good reliability.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is the structural representation when embodiment of the present invention one is in normal valve position；
Fig. 2 is the structural representation when embodiment of the present invention one is in improper valve position；
Fig. 3 is the reference state schematic diagram when embodiment of the present invention one resets；
Fig. 4 is the structural representation when embodiment of the present invention two is in normal valve position.
Embodiment
With reference to the accompanying drawings and examples, the present invention is expanded on further.In the following detailed description, only explanation is passed through
Mode describes some one exemplary embodiments of the present invention.Undoubtedly, one of ordinary skill in the art will recognize,
In the case of without departing from the spirit and scope of the present invention, described embodiment can be repaiied with a variety of modes
Just.Therefore, accompanying drawing and description are inherently illustrative, are not intended to limit the scope of the claims.
Embodiment one
As shown in figure 1, the buffering type pilot automatic valve triggered based on strut buckling, including the switch valve being installed on pipeline
10, the valve rod 11 of the switch valve 10 is connected with switch executive mechanism 20；It is provided with the pipeline of the switch valve upstream
Strut buckling guide trigger mechanism 30；When unstability bending occurs for the depression bar of the strut buckling guide trigger mechanism 30, institute is triggered
Switch executive mechanism 20 is stated to act, and then the switch executive mechanism 20 controls the switch valve 10 to open or close；It is described to open
Close executing agency 20 and be provided with pressure buffer mechanism 40.
In the present embodiment, the switch executive mechanism 20 includes being slidably fitted with push rod 22 in cylinder body 21, the cylinder body 21,
The one end of the push rod 22 away from the strut buckling guide trigger mechanism 30 is connected with execution piston 23, the execution piston 23
Compression spring 24 is provided between the cylinder body 21；Group for being provided with and being connected with the valve rod 11 is hinged on the push rod 22
Fork 25, the push rod 22 makes the valve position state that the shift fork 25 is driven when moving along a straight line and then changes the switch valve 10；It is described
Push rod 22 stretches out the cylinder body 21, the push rod 22 and the depression bar close to one end of the strut buckling guide trigger mechanism 30
Lockable mechanism 50 is provided between unstability guide trigger mechanism 30.
In the present embodiment, the pressure buffer mechanism 40 includes what is set between the cylinder body 21 and the execution piston 23
Buffer on the blast pipe 42 for being provided with and being connected with the buffering air cavity 41 on air cavity 41, the cylinder body 21, the blast pipe 42
Regulating valve 43 is installed.When switch valve is closed under compression spring effect, there is provided reverse for the air pressure rise in buffering air cavity 41
Cushion effect, so as to so that valve slowly closing, reduces the impulsive force of valve turn-off transient, not only making beneficial to extension valve
With the life-span, and it ensure that the slow stable regulation of system pressure.By adjusting the aperture of regulating valve 43, buffering air cavity can be adjusted
The speed of releasing of gas in 41, so as to adjust the closing velocity of valve.
In the present embodiment, the strut buckling guide trigger mechanism 30 is included in guide valve blocks 31, the guide valve blocks 31
First chamber 33 and second chamber 34 are divided into by diaphragm 32, first chamber 33 is by upstream pressure guiding pipe 35 with being located at the switch
The pipeline of the upstream of valve 10 is connected, and the push rod 36 being connected with the diaphragm 32, institute are slidably fitted with the guide valve blocks 31
The guide valve blocks 31 are stretched out at the two ends for stating push rod 36 respectively, and the one end of the push rod away from the push rod 22 is connected with frizzen
37；The lockable mechanism 50 is arranged between the push rod 36 and the push rod 22；When pressure exceedes setting in first chamber 33
During value, unstability bending occurs for the frizzen 37, and now the lockable mechanism 50, which is released, limits the switch executive mechanism 20,
The piston 23 that performs acts on lower compression in the elastic potential energy of compression spring 24 and moved to buffering air cavity 41 direction, performs
Piston 23 drives push rod 22 to move along a straight line, and then drives shift fork 25 to act by push rod 22, switch valve is changed by normal valve position
For improper valve position.Using diaphragm structure, increase compression area, while compared to piston structure, diaphragm becomes dynamic sealing
Static seal, it is therefore prevented that leakage；And when pressure exceedes setting value, action response is fast, be quick on the draw, and is particularly suitable for use in pressure
The higher low pressure occasion of control accuracy requirement, triggering sensitivity and good reliability.
As described above, guide's trigger mechanism 30 is to be based on pressure bar stabilization and strut buckling principle design, with two works
Make position.Determine which operating position is the mechanism be in, and then determine that the part whether whole automatic valve acts is triggering
Bar 37, the outside of the frizzen 37 is provided with protective cover 38, and the frizzen 37 is removable by nut and the protective cover 38
Unload connection.When pressure exceedes setting value in first chamber 33, pressure medium is quickly transmitted by diaphragm 32 and makes the triggering
Unstability bending occurs for bar 37, and now the lockable mechanism 50, which is released, limits the switch executive mechanism 20, and then the switch
The trigger switch valve 10 of executing agency 20 changes into improper valve position by normal valve position.
In the present embodiment, the lockable mechanism 50 includes the push rod limiting plate 51 being arranged on the push rod 22 and set
Plate 52 is opened in the rocking arm on the push rod 36, the both sides of the push rod limiting plate 51 are rotated respectively is provided with locking Rocker arm 53；
When the switch valve 10 is in normal valve position, the rocking arm opens plate 52 and limits two locking Rocker arm 5s 3 in open configuration, and
The position of the two limitation push rod of locking Rocker arm 53 limiting plates 51, such push rod 22 can be limited and nothing by two locking Rocker arm 5s 3
Method is moved.The free end of two locking Rocker arm 5s 3 is mounted on bearing 54, to reduce frictional force during action.
In addition, also including push rod resetting-mechanism 60, push rod resetting-mechanism described in the present embodiment 60 is hydraulic pressure resetting-mechanism,
It includes be slidably installed in the guide sleeve 61 being fixedly installed on the cylinder body 21, the guide sleeve 61 return piston 62, institute
The one end for stating return piston 62 is provided with Hynautio-steering, and the other end of the return piston 62 is connected with release link 63.Wherein,
Hynautio-steering includes being provided with hydraulic cylinder 65 in hydraulic fluid tank 64, the hydraulic fluid tank, and the hydraulic cylinder 65 passes through hydraulic tube 68
Connected with the guide sleeve 61, check valve is installed on the hydraulic tube 68；Between the hydraulic tube 68 and the hydraulic fluid tank 64
It is provided with return duct 69；Hydraulic piston 66 is provided with the hydraulic cylinder 65, the hydraulic piston 66 is connected with action bars 67, institute
The one end and the hydraulic fluid tank 64 for stating action bars 67 are hinged.In the present embodiment, indent is provided with and institute on the execution piston 23
The dashpot 44 of the adaptation of guide sleeve 61 is stated, the dashpot 44 is connected with the buffering air cavity 41.
The operation principle of the present invention is as follows：
With reference to Fig. 1, when pressure medium is less than setting pressure in switch valve upstream line, i.e. the first chamber of guide valve blocks 31
Pressure in room 33 is less than setting pressure, the load that now frizzen 37 is born pressure bar stabilization less than its critical load, when tactile
When sending out bar 37 in pressure bar stabilization state, the axial thrust of frizzen 37 can make push rod 36, diaphragm 32 and rocking arm open plate 52
In operating position one, now rocking arm, which opens plate 52 and opens two locking Rocker arm 5s 3, blocks, and prevents the rotation of locking Rocker arm 53
Transhipment is dynamic, and two locking Rocker arm 5s 3 push down push rod limiting plate 51, and axial linear movement, compression spring 24 will not occur for push rod 22
Elastic potential energy can not discharge, switch valve 10 be in normal valve position.
With reference to Fig. 2, when pressure medium is higher than setting pressure in switch valve upstream line, i.e. the first chamber of guide valve blocks 31
Pressure in room 33 is higher than setting pressure, and the load that now frizzen 37 is born will strut buckling, funeral more than its critical load
Bearing capacity is lost, after bearing capacity is lost in the bending of the unstability of frizzen 37, its thrust acted on push rod 36 can drop suddenly
Low, pressure medium can promote diaphragm 32 to be moved to operating position two, in the process, and push rod 36 can drive fixed thereto be integrated
Rocking arm open the movement of plate 52 until rocking arm opens plate 52 and loses effect of contraction to locking Rocker arm 53, push rod 22 is in compression spring
Locking Rocker arm 53 is promoted to rotate under 24 impetus, locking Rocker arm 53 will no longer push down push rod limiting plate 51, and push rod 22 is in pressure
Moved under the impetus of contracting spring 24, switch valve 10 is changed into (if just by improper valve position by normal valve position by shift fork 25
Switch valve is in standard-sized sheet position under normal operating mode, then switch valve should be closed automatically under superpressure operating mode, and valve position is changed into fully closed position；If normal work
Switch valve is in fully closed position under condition, then switch valve should be automatically turned under superpressure operating mode, and valve position is changed into standard-sized sheet position), it is achieved thereby that
The automatic opening or closing of valve during superpressure.
With reference to Fig. 3, after frizzen generation unstability and the pressure in switch valve auto-action and pressure pipeline recover normal,
Hydraulic pressure resetting-mechanism can be used to promote execution piston to recover to operating position one (i.e. initial position), and the triggering more renewed
Bar, whole valve completes to reset.Using hydraulic pressure resetting-mechanism, even if the compression bounce of compression spring is very big, it can also realize
Hand-reset.
Embodiment two
The present embodiment and the structural principle of embodiment one are essentially identical, and something in common is no longer repeated, and its unique difference exists
In：With reference to Fig. 4, second chamber 34 is by downstream pressure guiding pipe 39 and positioned at the switch in the strut buckling guide trigger mechanism
The pipeline in the downstream of valve 10 is connected.So, what the two sides of diaphragm 32 was experienced respectively is the pressure of upstream and downstream so that
The trigger force of guide's trigger mechanism is the pressure differential of upstream and downstream, and not exclusively upstream pressure.
Schematical embodiment of the invention is the foregoing is only, the scope of the present invention is not limited to.It is any
Those skilled in the art, made equivalent variations and modification on the premise of the design of the present invention and principle is not departed from,
The scope of protection of the invention all should be belonged to.
Claims (10)
1. the buffering type pilot automatic valve triggered based on strut buckling, including the switch valve (10) being installed on pipeline, described to open
The valve rod (11) for closing valve is connected with switch executive mechanism (20)；Strut buckling is provided with the pipeline of the switch valve upstream
Guide's trigger mechanism (30)；When unstability bending occurs for the depression bar of the strut buckling guide trigger mechanism (30), opened described in triggering
Executing agency (20) action is closed, and then the switch executive mechanism controls the switch valve (10) to open or close；Its feature exists
In：The switch executive mechanism (20) is provided with pressure buffer mechanism (40).
2. the buffering type pilot automatic valve as claimed in claim 1 triggered based on strut buckling, it is characterised in that：The switch
Executing agency (20) includes being slidably fitted with push rod (22) in cylinder body (21), the cylinder body, and the push rod loses away from the depression bar
One end of steady guide's trigger mechanism (30) is connected with execution piston (23), and pressure is provided between the execution piston and the cylinder body
Contracting spring (24)；The shift fork (25) for being provided with and being connected with the valve rod is hinged on the push rod, the push rod moves along a straight line
When drive the shift fork and then change the valve position state of the switch valve；The push rod triggers machine close to the strut buckling guide
The cylinder body is stretched out in one end of structure (30), and lockable mechanism is provided between the push rod and the strut buckling guide trigger mechanism
(50)。
3. the buffering type pilot automatic valve as claimed in claim 2 triggered based on strut buckling, it is characterised in that：The air pressure
Buffer gear (40) includes being provided with the buffering air cavity (41) set between the cylinder body and the execution piston, the cylinder body
The blast pipe (42) being connected with the buffering air cavity.
4. the buffering type pilot automatic valve as claimed in claim 3 triggered based on strut buckling, it is characterised in that：The exhaust
Regulating valve (43) is installed on pipe.
5. the buffering type pilot automatic valve as claimed in claim 3 triggered based on strut buckling, it is characterised in that：The depression bar
Unstability guide trigger mechanism (30) includes being divided into first by diaphragm (32) or piston in guide valve blocks (31), the guide valve blocks
Chamber (33) and second chamber (34), first chamber pass through upstream pressure guiding pipe (35) and the pipeline phase positioned at the switch valve upstream
The push rod (36) being connected with the diaphragm or piston, the two ends of the push rod are slidably fitted with connection, the guide valve blocks
The guide valve blocks are stretched out respectively, and the one end of the push rod away from the push rod is connected with frizzen (37)；The lockable mechanism
(50) it is arranged between the push rod (36) and the push rod (22)；
When pressure exceedes setting value in first chamber, unstability bending occurs for the frizzen (37), now the lockable mechanism
(50) release and the switch executive mechanism is limited, the piston (23) that performs is under the elastic potential energy effect of compression spring (24)
Oppress and to the movement of described buffering air cavity (41) direction, and then drive shift fork (25) action to make switch valve by normal by push rod (22)
Improper valve position is changed into valve position.
6. the buffering type pilot automatic valve as claimed in claim 3 triggered based on strut buckling, it is characterised in that：The depression bar
Unstability guide trigger mechanism (30) includes being divided into first by diaphragm (32) or piston in guide valve blocks (31), the guide valve blocks
Chamber (33) and second chamber (34), first chamber pass through upstream pressure guiding pipe (35) and the pipeline phase positioned at the switch valve upstream
Connection, second chamber (34) is connected by downstream pressure guiding pipe (39) with the pipeline positioned at the switch valve downstream；The guide
The push rod (36) being connected with the diaphragm or piston is slidably fitted with valve body, the elder generation is stretched out at the two ends of the push rod respectively
Pilot valve body, the one end of the push rod away from the push rod is connected with frizzen (37)；The lockable mechanism is arranged at the push rod
Between the push rod；
When the pressure differential of first chamber and second chamber exceedes setting value, unstability bending occurs for the frizzen, now described
Lockable mechanism, which is released, to be limited the switch executive mechanism, and the piston that performs acts on lower compression in the elastic potential energy of compression spring
And moved to the buffering air cavity direction, and then it is improper by push rod to drive shift fork action switch valve is changed into by normal valve position
Valve position.
7. the buffering type pilot automatic valve triggered based on strut buckling as described in claim 5 or 6, it is characterised in that：It is described
Lockable mechanism (50) includes the push rod limiting plate (51) being arranged on the push rod and the rocking arm being arranged on the push rod
Plate (52) is opened, the both sides of the push rod limiting plate are respectively arranged with locking rocking arm (53)；When the switch valve is in normal valve position,
The rocking arm opens plate (52) and limits two locking rocking arms in open configuration, and two locking rocking arms (53) limitation push rods are spacing
The position of plate (51).
8. the buffering type pilot automatic valve as claimed in claim 2 triggered based on strut buckling, it is characterised in that：Also include pushing away
Bar resetting-mechanism (60).
9. the buffering type pilot automatic valve as claimed in claim 8 triggered based on strut buckling, it is characterised in that：The push rod
Resetting-mechanism (60) is hydraulic pressure resetting-mechanism, and it is included in the guide sleeve (61) being fixedly installed on the cylinder body, the guide sleeve
Be slidably installed return piston (62), and one end of the return piston is provided with Hynautio-steering, the return piston it is another
One end is connected with release link (63).
10. the buffering type pilot automatic valve as claimed in claim 9 triggered based on strut buckling, it is characterised in that：It is described to hold
Indent is provided with the dashpot (44) being adapted to the guide sleeve, the dashpot and the buffering air cavity on row piston (23)
(41) it is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521589.3A CN107084277B (en) | 2017-06-30 | 2017-06-30 | Buffering type pilot automatic valve based on strut buckling triggering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521589.3A CN107084277B (en) | 2017-06-30 | 2017-06-30 | Buffering type pilot automatic valve based on strut buckling triggering |
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| CN107084277A true CN107084277A (en) | 2017-08-22 |
| CN107084277B CN107084277B (en) | 2019-05-21 |
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| CN201710521589.3A Active CN107084277B (en) | 2017-06-30 | 2017-06-30 | Buffering type pilot automatic valve based on strut buckling triggering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825833A (en) * | 2018-08-03 | 2018-11-16 | 江苏瑞朗博机械设备有限公司 | A kind of valve system with isolating device |
| CN109611414A (en) * | 2019-01-29 | 2019-04-12 | 青神格林维尔流体动力控制技术有限公司 | A kind of pilot-operated hydraulic lock |
| CN113605857A (en) * | 2021-08-23 | 2021-11-05 | 瀚中(南京)科技有限公司 | High-low pressure pilot valve and high-low pressure emergency cut-off device for pipeline |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825833A (en) * | 2018-08-03 | 2018-11-16 | 江苏瑞朗博机械设备有限公司 | A kind of valve system with isolating device |
| NL2023595A (en) * | 2018-08-03 | 2020-02-10 | Jiangsu Reliable Mech Equipment Co Ltd | Valve system with isolation device |
| CN109611414A (en) * | 2019-01-29 | 2019-04-12 | 青神格林维尔流体动力控制技术有限公司 | A kind of pilot-operated hydraulic lock |
| CN109611414B (en) * | 2019-01-29 | 2024-03-12 | 青神格林维尔流体动力控制技术有限公司 | Pilot-operated type hydraulic lock |
| CN113605857A (en) * | 2021-08-23 | 2021-11-05 | 瀚中(南京)科技有限公司 | High-low pressure pilot valve and high-low pressure emergency cut-off device for pipeline |
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Application publication date: 20170822 Assignee: Hanzhong (Nanjing) Technology Co., Ltd Assignor: Jiangsu Reliable Mechanical Equipment Co.,Ltd. Contract record no.: X2020980005319 Denomination of invention: Buffer pilot type automatic valve based on pressure bar instability trigger Granted publication date: 20190521 License type: Exclusive License Record date: 20200825 |
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Effective date of registration: 20201104 Address after: L3039, 3 / F, Chuangye building, No. 1009, Tianyuan East Road, Jiangning District, Nanjing, Jiangsu Province Patentee after: Hanzhong (Nanjing) Technology Co., Ltd Address before: 211316, No. 17 Tan Avenue, Gaochun Economic Development Zone, Nanjing, Jiangsu Patentee before: Jiangsu Reliable Mechanical Equipment Co.,Ltd. |
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