CN106917907B - A kind of pneumatic actuator for one-way damper valve - Google Patents
A kind of pneumatic actuator for one-way damper valve Download PDFInfo
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- CN106917907B CN106917907B CN201510997797.1A CN201510997797A CN106917907B CN 106917907 B CN106917907 B CN 106917907B CN 201510997797 A CN201510997797 A CN 201510997797A CN 106917907 B CN106917907 B CN 106917907B
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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
- F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
- F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
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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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of pneumatic actuators for one-way damper valve, belong to petrochemical industry catalytic cracking unit technical field.The pneumatic actuator includes: the first cylinder, the second cylinder, shift fork axle, shift fork and cylinder commutation control unit；The bar portion of shift fork is fixedly connected with the valve shaft of one-way damper valve；Cylinder commutation control unit is for controlling the first cylinder and the commutation of the second cylinder；Pneumatic actuator further include: clutch；Clutch is cylinder, its longitudinally is provided with guide groove on clutch；The both ends of clutch are fixedly connected with the piston rod of the piston rod of the first cylinder and the second cylinder respectively；The U-shaped opening and the guide groove on clutch that shift fork axle protrudes into shift fork end；Shift fork axle can be slided in U-shaped opening and can be for linear motion in guide groove simultaneously；The pneumatic actuator can improve efficiency, guarantee that one-way damper valve is shut under accident condition, while protecting the sealing surface of one-way damper valve.
Description
Technical field
The present invention relates to petrochemical industry catalytic cracking unit technical fields, in particular to a kind of to be used for one-way damper valve
Pneumatic actuator.
Background technique
It is usually provided with one-way damper valve on the main air blower outlet conduit of petrochemical industry catalytic cracking unit, works as generation
When accident leads to pipeline internal medium adverse current, one-way damper valve quick closedown is to prevent pipeline internal medium adverse current damage main air blower.It is single
Open and close to orifice valve rely primarily on pneumatic actuator matched with its to complete.
The existing pneumatic actuator for one-way damper valve be two formula pneumatic actuators, mainly include cylinder,
Shift fork, shift fork axle, solenoid valve and the piping of corresponding gas circuit.The bar portion of shift fork is provided with for connecting with one-way damper valve valve shaft
Through-hole, the end of shift fork is additionally provided with the opening of U-shaped.The piston rod of cylinder is connect along the vertical direction with cross shift fork axle,
It the intimate surface contact of the U-shaped opening of the horizontal direction and shift fork of cross shift fork axle and can be slided in the U-shaped opening of shift fork
It is dynamic.The piston rod of cylinder drives the valve shaft of one-way damper valve by shift fork, and solenoid valve is for controlling cylinder commutation to change piston
The direction of motion of bar realizes the open and close of one-way damper valve to change the motion profile of valve shaft.Under normal circumstances, gas
The piston rod of cylinder is moved along a direction makes one-way damper valve be in fully open position, and keeps the position constant；Under accident condition,
The commutation of solenoid valve control cylinder, makes valve rapid-closing.
In the implementation of the present invention, the inventors discovered that in the prior art the prior art has at least the following problems: existing two
Position formula pneumatic actuator makes one-way damper valve be in fully open position under normal circumstances, causes duct pressure loss excessive, leads
Catalytic cracking unit efficiency is caused to reduce.Meanwhile one-way damper valve will usually close within 3s when accident generation, with fast in this way
Speed closing will appear violent mechanical collision, causes one-way damper valve sealing surface of seat to damage, leads to the close of one-way damper valve
Sealing property is deteriorated, and cannot function well as the effect of protection main air blower.
Summary of the invention
In order to solve the above technical problems, the present invention, which provides one kind, can be improved device efficiency, and can prevent list
The pneumatic actuator for one-way damper valve of vigorous collision occurs into orifice valve closing process.
Specifically, including technical solution below:
A kind of pneumatic actuator for one-way damper valve, the pneumatic actuator include: the first cylinder, the second gas
Cylinder, shift fork axle, shift fork and cylinder commutation control unit；The valve shaft of the bar portion of the shift fork and the one-way damper valve is fixed to be connected
It connects；The cylinder commutation control unit is for controlling first cylinder and second cylinder commutation；Wherein, described pneumatically to hold
It is cylinder that row mechanism, which further includes clutch, the clutch, its longitudinally is provided with guiding on the clutch
Slot；The both ends of the clutch are fixed with the piston rod of the piston rod of first cylinder and second cylinder respectively to be connected
It connects, the U-shaped opening and the guide groove on the clutch that the shift fork axle protrudes into the shift fork end；The shift fork axle can
In the U-shaped opening sliding and can simultaneously it is for linear motion in the guide groove；When the one-way damper valve is opened,
The shift fork rotates under the drive of the valve shaft, and the shift fork axle is driven to move upwards along the vertical direction, first gas
Cylinder and second cylinder commutation drive the clutch to move upwards along the vertical direction；When the one-way damper valve is closed
When, first cylinder and second cylinder commutation drive the clutch to move vertically downwards, the clutch
The end face of the guide groove of mechanism is oppressed the shift fork axle and is moved vertically downwards after contacting with the shift fork axle, to drive
The shift fork rotation, the shift fork drive the valve shaft rotation, the pneumatic actuator further include: damping oil cylinder and fixation
Substrate；The damping oil cylinder is swing type damping oil cylinder, and the cylinder barrel of the swing type damping oil cylinder is up-small and down-big structure, described
The cylinder body of damping oil cylinder and the anchoring base are articulated and connected, and the piston rod of the damping oil cylinder and the bar portion of the shift fork are hinged
Connection, for the one-way damper valve during closing, the piston rod of the damping oil cylinder can be become vertical shape from heeling condition
State, the cylinder commutation control unit include: solenoid valve and Pneumatic valve；Solenoid valve gas source input port is connect with gas source, electromagnetism
Valve delivery outlet is connect with Pneumatic valve commutation control mouth by tracheae；Pneumatic valve gas source input port is connect with the gas source, Pneumatic valve
First delivery outlet is connect with interface on interface on the first cylinder and the second cylinder, is connect under the second delivery outlet of Pneumatic valve and the first cylinder
Mouth is connected with the second cylinder lower interface；When the one-way damper valve is opened, solenoid valve gas source input port and the electromagnetism
Valve equipped at outlet port in connected state, Pneumatic valve gas source input port and second equipped at outlet port of Pneumatic valve in connected state,
First delivery outlet of Pneumatic valve and Pneumatic valve first row port are in connected state；When the one-way damper valve is closed, institute
It states solenoid valve gas source input port to be in an off state with the solenoid valve delivery outlet, Pneumatic valve gas source input port and the gas
It controls the first equipped at outlet port of valve and is in connected state in connected state, second delivery outlet of Pneumatic valve and Pneumatic valve second exhaust port
State.
Further, the cylinder exchange system further includes source of the gas bigeminy part, described source of the gas bigeminy part one end and the gas
Source connection, the other end are connect with solenoid valve gas source input port and Pneumatic valve gas source input port.
Further, the both ends of the shift fork axle are additionally provided with circlip.
Further, the bar portion of the shift fork is connect with the valve shaft of the one-way damper valve by flat key.
Further, the clutch passes through with the piston rod of first cylinder and the piston rod of second cylinder
It is threadedly coupled.
Further, the anchoring base is cabinet.
The beneficial effect of technical solution provided in an embodiment of the present invention is:
(1) in pneumatic actuator provided in an embodiment of the present invention, using the double cylinder series designs of disengaging type, cylinder and list
To clutch, shift fork axle and shift fork connection is passed through between the valve shaft of orifice valve, shift fork axle can be in the guide groove of clutch
Interior linear motion, and shift fork can be oppressed, valve shaft is driven to circle；In one-way damper valve opening process, cylinder commutation control
Unit processed controls the elongation of the first cylinder piston rod, the second cylinder piston rod shrinks to transport clutch upwards along the vertical direction
Dynamic, in this process, the both ends of clutch guide groove are not contacted with shift fork axle, and shift fork will not rotate, therefore valve
Axis not will receive the external force from pneumatic actuator, and valve only relies on the auxiliary of weight on pipeline internal medium pressure and shift fork
Effect is helped to open, aperture depends on pressure medium and changes in flow rate, i.e., servo-actuated valve opening avoids pipeline pressure during valve opening
Power loss is excessive, significantly improves efficiency.When occurring in accident one-way damper valve closing process, cylinder commutation control unit control the
One cylinder piston rod is shunk, the elongation of the second cylinder piston rod is to make clutch move vertically downwards, is reached certain
When position, the upper surface of clutch guide groove is contacted with shift fork axle to which shift fork axle moves downward, and shift fork axle is oppressed shift fork and turned
It is dynamic, so that valve shaft movement be driven to close orifice valve, plays the role of auxiliary and close valve, and since double cylinder series designs provide
Biggish output torque increases close moment, guarantees under accident condition that orifice valve is shut and zero leakage.It can satisfy big
The biggish pass valve torque demand of bore orifice valve, has widened matching one-way damper valve bore range.
(2) swing type damping oil cylinder is additionally used in pneumatic actuator provided in an embodiment of the present invention, realizes unidirectional resistance
Buddhist nun's valve closes end buffering, avoids occurring violent mechanical collision during one-way damper valve quick closedown and sealing surface being caused to damage
It is bad.
(3) also cylinder reversing control system is improved in pneumatic actuator provided in an embodiment of the present invention, it will
Solenoid valve and Pneumatic valve combine control cylinder commutation.Solenoid valve provides pressure signal for Pneumatic valve, and Pneumatic valve control cylinder changes
To can be avoided in cylinder commutation process the cylinder because caused by gas flow is insufficient since Pneumatic valve has biggish latus rectum
" creeping ".
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 the structural schematic diagram of pneumatic actuator provided in an embodiment of the present invention in normal operation；
Fig. 2 is the structural schematic diagram of pneumatic actuator provided in an embodiment of the present invention in the state of accident；
Fig. 3 is that the structure of shift fork, shift fork axle and clutch in pneumatic actuator provided in an embodiment of the present invention is shown
It is intended to；
Fig. 4 is the top view of Fig. 3；
Fig. 5 be pneumatic actuator provided in an embodiment of the present invention in cylinder commutation control unit in normal operation
Connected mode schematic diagram；
Fig. 6 is the company of cylinder commutation control unit in the state of accident in pneumatic actuator provided in an embodiment of the present invention
Connect schematic diagram；
Fig. 7 is the structural schematic diagram of swing type damping oil cylinder in pneumatic actuator provided in an embodiment of the present invention.
Appended drawing reference respectively indicates:
1, the first cylinder；
2, clutch；21, threaded hole；
3, shift fork axle；4, flat key；5, valve shaft；6, shift fork；
7, damping oil cylinder；71, damping oil cylinder piston rod；72, one-way throttle valve；
8, the second cylinder；9, anchoring base；
10, Pneumatic valve；11, solenoid valve；12, source of the gas bigeminy part；13, circlip；
P, gas source；
O, Pneumatic valve commutation control mouth；
Interface on 1A, the first cylinder；1B, the first cylinder lower interface；
Interface on 8A, the second cylinder；8B, the second cylinder lower interface；
10P, Pneumatic valve gas source input port；
10A, the first delivery outlet of Pneumatic valve；10B, the second delivery outlet of Pneumatic valve；
10R, Pneumatic valve first row port；10S, Pneumatic valve second exhaust port；
11P, solenoid valve gas source input port；
11A, solenoid valve delivery outlet；11R, solenoid valve vents mouth.
Specific embodiment
To keep technical solution of the present invention and advantage clearer, below in conjunction with attached drawing to embodiment of the present invention make into
One step it is described in detail.
The embodiment of the present invention provides a kind of pneumatic actuator for one-way damper valve, the pneumatic actuator and unidirectional
The valve shaft of orifice valve connects, and referring to Fig. 1, and combines Fig. 2 and Fig. 3, which includes: the first cylinder 1, the second cylinder
8, shift fork axle 3, shift fork 6 and cylinder commutation control unit；The bar portion of shift fork 6 is fixedly connected with the valve shaft 5 of one-way damper valve；Gas
Cylinder commutation control unit is for controlling the first cylinder 1 and the commutation of the second cylinder 8；Wherein, pneumatic actuator further include: clutch
Mechanism 2；Clutch 2 is cylinder, its longitudinally is provided with guide groove on clutch 2；Distinguish at the both ends of clutch 2
It is fixedly connected with the piston rod of the piston rod of the first cylinder 1 and the second cylinder 8, shift fork axle 3 protrudes into the U-shaped opening of 6 end of shift fork
And the guide groove on clutch 2；Shift fork axle 3 can be slided in U-shaped opening and can while make straight line fortune in guide groove
It is dynamic.
When one-way damper valve open when, shift fork 6 rotates under the drive of valve shaft 5, and drive shift fork axle 3 along the vertical direction to
Upper movement, the first cylinder 1 and the commutation of the second cylinder 8 drive clutch 2 to move upwards along the vertical direction.
When one-way damper valve close when, the first cylinder 1 and the second cylinder 8 commutation drive clutch 2 along the vertical direction to
Lower movement, compressing shift fork axle 3 moves vertically downwards after the end face of the guide groove of clutch 2 is contacted with shift fork axle 3, from
And shift fork 6 is driven to rotate, shift fork 6 drives valve shaft 5 to rotate.
In pneumatic actuator provided in an embodiment of the present invention, using the double cylinder series designs of disengaging type.Cylinder and unidirectional
It is connected between the valve shaft 5 of orifice valve by clutch 2, the shift fork axle 3 of " "-" type " and shift fork 6, shift fork axle 3 can exist simultaneously
It slides in the U-shaped opening of 6 end of shift fork and moves along a straight line in the guide groove of clutch 2, when the first cylinder 1, the second gas
After the piston rod of cylinder 8 drives the linear motion of clutch 2 to contact to guide groove top with shift fork axle 3, shift fork axle 3 oppresses shift fork 6
Rotation, so that the valve shaft rotation being fixedly connected with shift fork is driven, it is final to realize that one-way damper valve opens and closes.And due to double
Cylinder series design provides biggish output torque, increases close moment, guarantee under accident condition orifice valve shut and
Zero leakage.It can satisfy the biggish pass valve torque demand of heavy caliber orifice valve, widened matching one-way damper valve bore
Range.The specific working principle is as follows:
Referring to Fig. 1, in one-way damper valve opening process, the valve plate (not shown) of one-way damper valve is by pipeline
After pressure medium effect, valve shaft 5 connected to it is driven to rotate, valve shaft 5 is further driven to shift fork 6 connected to it and rotates.It dials
It pitches in 6 rotation processes, 3 one side of shift fork axle penetrated in its U-shaped opening does straight up straight along the guide groove of clutch 2
Line movement, on the other hand along the U-shaped mouth contact plane sliding in shift fork end.At the same time, cylinder commutation control unit control first
The piston rod elongation of cylinder 1,8 piston rod of the second cylinder shrink to move upwards clutch 2 along the vertical direction, at this
In the process, two end faces up and down of guide groove do not contact with shift fork axle 3, and upper surface is farthest from shift fork axle 3, clutch 2
It will not stop the upstroke of shift fork axle 3.It can be seen that valve shaft 5 not will receive from gas in one-way damper valve opening process
The external force of dynamic executing agency, valve only rely on the auxiliary of the weight (not shown) in pipeline internal medium pressure and shift fork 6
Effect is helped to open, aperture depends on pressure medium and changes in flow rate, this process is known as servo-actuated valve opening, avoids valve opening process
Middle duct pressure loss is excessive, significantly improves efficiency.Also, due to the presence of clutch 2, moreover it is possible to protect piston rod, avoid
Because the reciprocating action of piston rod long-time and abrasion deformation caused by valve plate (not shown) servo oscillation and mechanical performance reduce.
Referring to fig. 2, when occurring in accident one-way damper valve closing process, cylinder commutation control unit controls the first cylinder 1
Piston rod shrink, the elongation of the piston rod of the second cylinder 8 is to make clutch 2 move vertically downwards, reach certain
When position, the upper surface of 2 guide groove of clutch contacts that shift fork axle 3 is pushed to move downward with shift fork axle 3, and shift fork axle 3 is pressed
Compel shift fork 6 to rotate, so that the rotation of valve shaft 5 be driven to close orifice valve.It should be noted that the aperture due to one-way damper valve is
The moment that is determined by pipeline internal medium pressure and flow, therefore will be closed in one-way damper valve, opening size be it is unknown,
Also the distance between upper surface and the shift fork axle 3 for allowing for the guide groove of clutch 2 are unknown.Only when clutch 2
After being moved downwardly to certain position.After the upper surface of guide groove is contacted with shift fork axle 3, pneumatic actuator just starts to play closing
The effect of valve, and when the upper surface of guide groove is not contacted with shift fork axle 3, valve plate can in pipeline counter-flow media pass valve power
Square effect is lower to close, and therefore, which plays the role of auxiliary in one-way damper valve closing process and close valve.
Further, closed caused by counter-flow media during pneumatic actuator assists closing valve, in pipeline valve torque compared with
Greatly, pneumatic actuator auxiliary closes valve fast speed, often violent mechanical collision occurs in pass valve moment, sealing surface is caused to damage
Bad, sealing effect is deteriorated, or even can not cut off adverse current, does not have the effect of protection main air blower.Therefore, the embodiment of the present invention provides
Pneumatic actuator in also by swing type damping oil cylinder 7 realize one-way damper valve close end buffering, avoid unidirectional damping
Occur violent mechanical collision during valve quick closedown and sealing surface is caused to damage.The cylinder body and anchoring base 9 of damping oil cylinder 7
Articulated connection, the piston rod of damping oil cylinder 7 and the bar portion of shift fork 6 are articulated and connected.The cylinder body of damping oil cylinder 7 is in anchoring base 9
Hinged spot wobble while its piston rod 71 do Direct Travel movement, starting damping action close to valve closed positions.Ginseng
Fig. 1 and Fig. 2 are seen, when occurring in accident one-way damper valve closing process, with the rotation of shift fork 6, the piston rod 71 of damping oil cylinder 7
The vertical state gradually become in Fig. 2 is become by the heeling condition in Fig. 1, the length of stretching is gradually reduced, when it foreshortens to drive
When the piston of damping oil cylinder enters the small chamber in oil cylinder top, damping oil cylinder 7 has started damping action, and damping force size is with load and pendulum
It moves angle change and changes, avoid damping excessive or card group caused by traditional Direct Travel oil cylinder constant damping, to prevent end
Damping moment rises sharply when the buffering of end, effectively plays buffer function, protects sealing surface, extends the service life of single-phase orifice valve.This
Field technical staff is it is understood that 7 cylinder barrel of swing type damping oil cylinder is up-small and down-big structure in the embodiment of the present invention, unidirectionally
In orifice valve closing process, damping oil cylinder 7 swung around anchoring base 9 and piston by the big chamber in cylinder barrel lower part to progress into top small
Chamber, once piston enters the small chamber in top, damping oil cylinder 7 has started damping action；At this point, one-way damper valve has been approached closing, institute
With this process is referred to as to close valve end buffering.In addition, damping oil cylinder 7 is also provided with one-way throttle valve 72 (referring to Fig. 7), it is adjustable
The damping size for saving damping oil cylinder 7, reaches optimized buffer effect.It can be appreciated that passing through one-way throttle valve 72 for damping oil cylinder 7
After damping size is adjusted to optimum state, the damping size of damping oil cylinder 7 is constant, but due to cylinder piston rod during the valve of pass
Gradually switched to by heeling condition vertically, so, the component size that piston rod acts on shift fork 6 is also gradually changing, this change
Change the process that valve plate (not shown) closes valve moment variations that can preferably adapt to, prevents cylinder piston rod stuck.Meanwhile closing valve
End rather than whole damping also can guarantee the emergency cut-off time.
Further, in conventional solenoid valve control cylinder commutation process, since solenoid valve latus rectum is smaller, gas flow
It is not able to satisfy the needs of double cylinders, therefore, also to cylinder commutation control list in pneumatic actuator provided in an embodiment of the present invention
Improvement is optimized in member, solenoid valve 11 and Pneumatic valve 10 is combined to control cylinder commutation.Solenoid valve 11 is Pneumatic valve 10
Pressure signal is provided, Pneumatic valve 10 controls cylinder commutation.In the embodiment of the present invention, solenoid valve 11 uses two-position three way magnetic valve,
Pneumatic valve 10 uses two-position five-way Pneumatic valve.Wherein, solenoid valve gas source input port 11P is connect with gas source P, solenoid valve delivery outlet
11A is connect with Pneumatic valve commutation control mouth O by tracheae；Pneumatic valve gas source input port 10P is connect with gas source P, Pneumatic valve first
Delivery outlet 10A is connect with interface 8A on interface 1A on the first cylinder and the second cylinder, Pneumatic valve the second delivery outlet 10B and the first gas
Cylinder lower interface 1B and the second cylinder lower interface 8B connection.
Referring to Fig. 5, in one-way damper valve opening process, solenoid valve 11 it is electric, right position is opened, at this point, solenoid valve gas source is defeated
Entrance 11P and solenoid valve delivery outlet 11A are in connected state.Gas source P is divided into two branches, a routing solenoid valve gas source input
Mouth 11P enters solenoid valve 11 and is exported by solenoid valve delivery outlet 11A to Pneumatic valve commutation control mouth O, is Pneumatic valve commutation control
Mouth O provide pressure signal.When Pneumatic valve commutation control mouth O receives pressure signal, right position is opened, Pneumatic valve gas source input port
10P and Pneumatic valve the second delivery outlet 10B is in connected state, Pneumatic valve the first delivery outlet 10A and Pneumatic valve first row port 10R
In connected state.Another branch gas source P enters Pneumatic valve 10 by Pneumatic valve gas source input port 10P, is exported by Pneumatic valve second
It is being divided into two branches after mouth 10B output, the first gas is entered by the first cylinder lower interface 1B and the second cylinder lower interface 8B respectively
Cylinder 1 and the second cylinder 8 push the piston of the first cylinder 1 and the piston upwards of the second cylinder 8, drive clutch 2 upward
Movement, makes the guide groove on clutch 2 will not influence the upstroke of shift fork axle 3.
Referring to Fig. 6, under accident condition in check valve closing process, 11 power loss of solenoid valve commutation, left position is opened, solenoid valve gas
Source input port 11P is in an off state with solenoid valve delivery outlet 11A.Gas source P cannot be introduced into Pneumatic valve commutation control mouth O and mention for it
For pressure signal.In Pneumatic valve commutation control mouth O no pressure signal, Pneumatic valve 10 quickly commutates, and left position is opened, Pneumatic valve gas
Source input port 10P and Pneumatic valve the first delivery outlet 10A is in connected state, Pneumatic valve the second delivery outlet 10B and Pneumatic valve second
Exhaust outlet 10S is in connected state.Gas source P enters Pneumatic valve 10 by Pneumatic valve gas source input port 10P, is exported by Pneumatic valve first
Two branches are further divided into after mouth 10A output, the first gas is entered by interface 8A on interface 1A on the first cylinder and the second cylinder respectively
Cylinder 1 and the second cylinder 8, piston moves downward for the piston and the second cylinder 8 for pushing the first cylinder 1, drives clutch 2 along perpendicular
Histogram is to moving downward, to realize the quick closedown of valve.Residual air is by Pneumatic valve in 8 cylinder of first cylinder 1 and the second cylinder
Two exhaust outlet 10S emptying.Under above two working condition, gas source P is always from the first cylinder 1 and second of entrance of Pneumatic valve 11
Cylinder 8, since Pneumatic valve 11 has biggish latus rectum, the air-flow exported from Pneumatic valve 11 is able to satisfy the stream of double cylinders completely
Amount and rate request, avoid small bare sizing electro-magnetic valve commutation when because of caused by underfed cylinder " creeping " or even card resistance.Greatly
Latus rectum Pneumatic valve 11 application avoid cylinder commutation be not thorough, guarantee cylinder commutation rapidly in place, do not influence orifice valve with
Dynamic process.
Further, in pneumatic actuator provided in an embodiment of the present invention, cylinder reversing unit is additionally provided with gas source two
Join part 12, referring to Fig. 1 (or Fig. 2), 12 one end of source of the gas bigeminy part is connect with gas source P, the other end and solenoid valve gas source input port 11P
It is connected with Pneumatic valve gas source input port 10P, it is defeated with solenoid valve gas source respectively that gas source P is divided into two branches after source of the gas bigeminy part 12
Entrance 11P is connected with Pneumatic valve gas source input port 10P.
Further, referring to Fig. 3 and Fig. 4, in pneumatic actuator provided in an embodiment of the present invention, the one of shift fork 6 are combined
End is provided with two pieces of fork plates, is respectively arranged with U-shaped opening on two pieces of fork plates.Clutch 2 be located at two pieces of fork plates it
Between, one end of shift fork axle 3 is penetrated by the U-shaped opening on one of fork plate, by another after the guide groove of clutch 2
U-shaped opening on block fork plate is pierced by, to make shift fork axle 3 can be for linear motion along guide groove simultaneously and in U-shaped opening
Sliding.The both ends of shift fork axle 3 are additionally provided with circlip for shaft 13, to make 3 axial restraint of shift fork axle.
Further, connected referring to Fig. 3 and in conjunction with Fig. 4, the bar portion of shift fork 6 and the valve shaft 5 of one-way damper valve by flat key 4
It connects.Specifically, connecting hole and keyway are offered at the position of U-shaped opening in the bar portion of shift fork 6, by 5 company of penetrating of valve shaft
Connect the connection of Kong Houyong flat key 4.It will be appreciated by persons skilled in the art that the connection side of the valve shaft 5 of shift fork 6 and one-way damper valve
Formula is not limited to flat key connection, the connection types such as threaded connection, interference fit, as long as guaranteeing to open and close in one-way damper valve
Shift fork 6 and valve shaft 5 do not loosen during closing.
Further, referring to Fig. 3, in pneumatic actuator provided in an embodiment of the present invention, clutch 2 can be cylinder
Body, or the cylinder of the other forms such as cuboid.The work of the piston rod and the second cylinder 8 of clutch 2 and the first cylinder 1
Stopper rod can be connected through a screw thread, i.e., can also be using commonly used in the art other in 2 both ends thread mill drilling 21 of clutch
Connection type connection.
Further, referring to Fig. 1 (or Fig. 2), in pneumatic actuator provided in an embodiment of the present invention, due to shift fork 6
It itself is to be arranged in cabinet, therefore can use the cabinet as anchoring base 9.
To sum up, the embodiment of the present invention with novel catalytic cracking process requirements be according to, risen to and cut with refinery device efficiency
Access point, to guarantee that the safe operation of catalytic unit key equipment for target, carries out existing single-phase orifice valve pneumatic actuator
Optimal improvements provide a kind of buffering disengaging type pneumatic actuator.By the clutch that is connected between double cylinders and its
Stepless switching achievees the effect that servo-actuated valve opening and auxiliary close valve, caused by changing when two formula pneumatic actuators force valve opening
Duct pressure loss is excessive, and device efficiency improves.And double cylinder series connection increase and close valve torque, guarantee orifice valve under accident condition
It shuts and zero leakage.Using swing type buffer damping oil cylinder, during closing valve, piston rod is done while oil cylinder is along hinged spot wobble
Direct Travel moves, and cylinder damping size changes with angle change in swing process.Direct Travel oil cylinder constant damping is avoided to draw
The damping risen is excessive or card resistance, realization close valve end buffering, protect sealing surface.It is commutated using big orifice Pneumatic valve control cylinder,
It commutates instead of solenoid valve control cylinder in conventional design.Big orifice Pneumatic valve is able to satisfy the flow of double cylinders completely and speed is wanted
Ask, avoid small bare sizing electro-magnetic valve commutation when because of caused by underfed cylinder " creeping ".
The above is merely for convenience of it will be understood by those skilled in the art that technical solution of the present invention, not to limit
The present invention.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (6)
1. a kind of pneumatic actuator for one-way damper valve, the pneumatic actuator includes: the first cylinder (1), second
Cylinder (8), shift fork axle (3), shift fork (6) and cylinder commutation control unit；
The bar portion of the shift fork (6) is fixedly connected with the valve shaft (5) of the one-way damper valve；
The cylinder commutation control unit is for controlling first cylinder (1) and second cylinder (8) commutation；
It is characterized in that,
The pneumatic actuator further include: clutch (2)；
The clutch (2) is cylinder, its longitudinally is provided with guide groove on the clutch (2)；The clutch
The both ends of mechanism (2) are fixedly connected with the piston rod of the piston rod of first cylinder (1) and second cylinder (8) respectively,
The U-shaped opening and the guide groove on the clutch (2) that the shift fork axle (3) protrudes into the shift fork (6) end；Institute
State shift fork axle (3) can be slided in the U-shaped opening and can simultaneously it is for linear motion in the guide groove；
When the one-way damper valve is opened, the shift fork (6) rotates under the drive of the valve shaft (5), and drives described dial
Fork shaft (3) moves upwards along the vertical direction, and first cylinder (1) and second cylinder (8) commutation drive the clutch
Structure (2) moves upwards along the vertical direction；
When the one-way damper valve is closed, first cylinder (1) and second cylinder (8) commutation drive the clutch
Structure (2) moves vertically downwards, and the end face of the guide groove of the clutch (2) is pressed after contacting with the shift fork axle (3)
Compel the shift fork axle (3) to move vertically downwards, to drive the shift fork (6) to rotate, described in shift fork (6) drive
Valve shaft (5) rotation,
The pneumatic actuator further include: damping oil cylinder (7) and anchoring base (9)；The damping oil cylinder (7) is swing type
Damping oil cylinder, the cylinder barrel of the swing type damping oil cylinder (7) are up-small and down-big structure, the cylinder body of the damping oil cylinder (7) and institute
Anchoring base (9) articulated connection is stated, the piston rod of the damping oil cylinder (7) and the bar portion of the shift fork (6) are articulated and connected, described
For one-way damper valve during closing, the piston rod of the damping oil cylinder (7) can become vertical state from heeling condition,
The cylinder commutation control unit includes: solenoid valve (11) and Pneumatic valve (10)；Solenoid valve gas source input port (11P) with
Gas source (P) connection, solenoid valve delivery outlet (11A) are connect with Pneumatic valve commutation control mouth (O) by tracheae；The input of Pneumatic valve gas source
Mouth (10P) is connect with the gas source (P), interface (1A) and the second cylinder on the first delivery outlet of Pneumatic valve (10A) and the first cylinder
Upper interface (8A) connection, the second delivery outlet of Pneumatic valve (10B) and the first cylinder lower interface (1B) and the second cylinder lower interface (8B)
Connection；When the one-way damper valve is opened, solenoid valve gas source input port (11P) and the solenoid valve delivery outlet (11A)
In connected state, Pneumatic valve gas source input port (10P) and second delivery outlet of Pneumatic valve (10B) are in connected state
State, first delivery outlet of Pneumatic valve (10A) and Pneumatic valve first row port (10R) are in connected state；In the unidirectional resistance
When Buddhist nun's valve is closed, solenoid valve gas source input port (11P) is in an off state with the solenoid valve delivery outlet (11A), described
Pneumatic valve gas source input port (10P) and first delivery outlet of Pneumatic valve (10A) are in connected state, and the Pneumatic valve second is defeated
Outlet (10B) and Pneumatic valve second exhaust port (10S) are in connected state.
2. pneumatic actuator according to claim 1, which is characterized in that the cylinder exchange system further includes gas source two
Join part (12), described source of the gas bigeminy part (12) one end is connect with the gas source (P), the other end and solenoid valve gas source input port
The connection of (11P) and Pneumatic valve gas source input port (10P).
3. pneumatic actuator according to claim 1, which is characterized in that the both ends of the shift fork axle (3) are additionally provided with
Circlip (13).
4. pneumatic actuator according to claim 1, which is characterized in that the bar portion of the shift fork (6) and described unidirectional
The valve shaft (5) of orifice valve is connected by flat key (4).
5. pneumatic actuator according to claim 1, which is characterized in that the clutch (2) and first gas
The piston rod of the piston rod of cylinder (1) and second cylinder (8) is connected through a screw thread.
6. pneumatic actuator according to claim 1, which is characterized in that the anchoring base (9) is cabinet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510997797.1A CN106917907B (en) | 2015-12-26 | 2015-12-26 | A kind of pneumatic actuator for one-way damper valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510997797.1A CN106917907B (en) | 2015-12-26 | 2015-12-26 | A kind of pneumatic actuator for one-way damper valve |
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| Publication Number | Publication Date |
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| CN106917907A CN106917907A (en) | 2017-07-04 |
| CN106917907B true CN106917907B (en) | 2019-10-11 |
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| CN201510997797.1A Active CN106917907B (en) | 2015-12-26 | 2015-12-26 | A kind of pneumatic actuator for one-way damper valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108644433B (en) * | 2018-07-09 | 2024-03-26 | 江南阀门有限公司 | High-row check valve |
| CN113551075B (en) * | 2020-04-25 | 2023-05-09 | 上海梅山钢铁股份有限公司 | Anti-jamming control device and control method for air outlet check valve of blast furnace blower |
| CN111828721A (en) * | 2020-07-28 | 2020-10-27 | 广西柳州钢铁集团有限公司 | Pneumatic butterfly valve control method |
| CN117469414B (en) * | 2023-12-27 | 2024-04-30 | 四川九天真空科技有限公司 | Side drive gate valve and driving system |
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|---|---|---|---|---|
| CN1940364A (en) * | 2005-09-28 | 2007-04-04 | 黄作兴 | Auxiliary shutter of check valve |
| CN201090799Y (en) * | 2007-08-21 | 2008-07-23 | 河南上蝶阀门股份有限公司 | Energy change type slow closing non-return butterfly valve |
| CN101331325A (en) * | 2005-12-16 | 2008-12-24 | 北村阀门制造株式会社 | Valve actuator |
| CN202074084U (en) * | 2011-05-25 | 2011-12-14 | 西安三高阀门有限公司 | Butterfly check valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4369292B2 (en) * | 2004-05-06 | 2009-11-18 | タイコ フローコントロールジャパン株式会社 | Emergency shut-off valve device |
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2015
- 2015-12-26 CN CN201510997797.1A patent/CN106917907B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1940364A (en) * | 2005-09-28 | 2007-04-04 | 黄作兴 | Auxiliary shutter of check valve |
| CN101331325A (en) * | 2005-12-16 | 2008-12-24 | 北村阀门制造株式会社 | Valve actuator |
| CN201090799Y (en) * | 2007-08-21 | 2008-07-23 | 河南上蝶阀门股份有限公司 | Energy change type slow closing non-return butterfly valve |
| CN202074084U (en) * | 2011-05-25 | 2011-12-14 | 西安三高阀门有限公司 | Butterfly check valve |
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| CN106917907A (en) | 2017-07-04 |
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