CN106594365B - Suitable for the automatic valve by strut buckling trigger action of low pressure operating mode - Google Patents
Suitable for the automatic valve by strut buckling trigger action of low pressure operating mode Download PDFInfo
- Publication number
- CN106594365B CN106594365B CN201610201112.2A CN201610201112A CN106594365B CN 106594365 B CN106594365 B CN 106594365B CN 201610201112 A CN201610201112 A CN 201610201112A CN 106594365 B CN106594365 B CN 106594365B
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- Prior art keywords
- rocking arm
- valve
- rod
- piston
- valve stem
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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
-
- 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
- F16K31/44—Mechanical actuating means
Abstract
The present invention is a kind of automatic valve by slender compression bar unstability trigger action suitable for low pressure operating mode, its critical piece includes downstream line, angular travel valve, upstream line, pressure guiding pipe, piston, piston rod, piston cylinder, push rod, push rod guider, elongate rod, pole cap, pole cap clamper, rocking arm, rocking arm maincenter, position-arresting device, valve rod, valve stem actuators, actuator push rod, actuator spring, actuator fulcrum, wherein elongate rod is the core trigger part of the automatic valve, determines which kind of valve position whole automatic valve is in.When elongate rod keeps straight line stable state, it maintains rocking arm to be in poised state jointly by push rod and piston and piston rod, and valve stem actuators are blocked by rocking arm, and angular travel valve is in normal valve position;When unstability bending occurs for elongate rod, rocking arm rotates, and valve stem actuators depart from the constraint of rocking arm and rotated under the effect of actuator push rod, and then angular travel valve is changed into improper valve position by normal valve position with ovable valve stem.
Description
Technical field
The present invention relates to a kind of valve, more particularly relate to it is a kind of can be automatically turned under low pressure or ultralow pressure operating mode or
The valve of closing.
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, usually using pressure transmitter detection pressure pipe
Pressure in road or pressure vessel, pressure transmitter output 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, valve is but not as scheduled
The situation of action, threatened to pressure pipeline, the device of pressure vessel and their upstream and downstream and equipment belt.
The present invention is mainly by valve stem actuators, angular travel valve, rocking arm, rocking arm maincenter, position-arresting device, piston, piston rod, top
Bar, push rod guider, elongate rod, pole cap, pole cap clamper and pressure guiding pipe composition.Wherein elongate rod is the whole automatic valve of control
The core trigger part being turned on and off, principle of the design based on pressure bar stabilization and strut buckling of the trigger unit.Elongate rod
Axis and pole cap, push rod, the axis of piston rod on same straight line.Piston bears the medium pressure in upstream line
Power, this pressure loading are carried in elongate rod by piston rod, rocking arm and push rod.When loading on the axial force in elongate rod
Less than elongate rod critical load when, elongate rod is in straight line stable state, and the axial propulsive thrust of elongate rod is transferred to push rod, and
Rocking arm is maintained to be in poised state jointly through the thrust in piston effect to piston rod with medium, valve stem actuators are to the anti-of rocking arm
Thrust passes through rocking arm maincenter center, thus is zero to the rotary arm of rocking arm, does not influence rocking arm balance.Now, rocking arm will not be sent out
Raw rotation, it is blocked valve stem actuators by the locking structure of particular design, and angular travel valve is in normal valve position;Work as loading
When the axial force in elongate rod exceedes the critical load of elongate rod, elongate rod unstability bends and loses bearing capacity, carefully
The axial propulsive thrust that stock is acted on push rod disappears, and pressure medium can promote piston and piston rod to move, and promote with spy
The rocking arm of different locking structure rotates around rocking arm maincenter, until rocking arm loses the effect of contraction to valve stem actuators.Now, valve rod
Driver rotates under actuator spring and the effect of actuator push rod, and then changes angular travel valve by normal valve position with ovable valve stem
It is changed into improper valve position, it is achieved thereby that the automatic opening or closing of superpressure operating mode lower valve.
In this application, based on the core trigger part elongate rod that pressure bar stabilization and strut buckling principle design and piston,
The parts such as piston rod, push rod, push rod guider, pole cap, pole cap clamper, rocking arm, rocking arm maincenter act synergistically, and realize pressure
The function of both transmitter and control system, whole system are transmitted without sensor and signal, and design is simple, securely and reliably, especially
It is applied to the weaker operating modes of medium power such as low pressure or ultralow pressure.
The content of the invention
By the automatic valve of strut buckling trigger action during superpressure of the present invention, it is mainly by valve stem actuators, angle
Motion valve, rocking arm (locking structure for carrying particular design), rocking arm maincenter, position-arresting device, piston, piston rod, push rod, push rod are led
Formed to device, pole cap, pole cap clamper, elongate rod and pressure guiding pipe.
Wherein, the function of pressure guiding pipe is that the upstream line of angular travel valve is connected with piston cylinder pressure chamber, makes piston
Bear the pressure medium in angular travel valve upstream line.
Wherein, elongate rod is the core trigger part that the whole automatic valve of control is turned on and off, and the trigger unit is set
The principle based on pressure bar stabilization and strut buckling is counted, has straight line stable and unstability bends two working conditions, and determine automatic
Valve is in normal or improper valve position, and its one end is connected with push rod, the other end and the pole cap phase being installed in pole cap clamper
Connect.
Wherein, rocking arm has the locking structure of particular design, and the contact surface of itself and valve stem actuators is with rocking arm maincenter
Pivot is the arc surface in the center of circle.Valve stem actuators to the active force of rocking arm can by the pivot of rocking arm maincenter, so
The active force that valve stem actuators are acted on rocking arm is zero to the rotary arm of rocking arm, and it will not cause the rotation of rocking arm.Even if
When rocking arm actively does small rotary motion, valve stem actuators will not also produce any rotation.In addition, ditch is devised on rocking arm
Groove, and groove width is more than the position width being in contact with it on valve stem actuators, when rocking arm is certain around the rotation of rocking arm maincenter
After angle, the position blocked on valve stem actuators by rocking arm can skid off from the groove of rocking arm, until rocking arm release is driven to valve rod
The effect of contraction of dynamic device.Now, valve stem actuators rotate under actuator push rod and actuator spring effect, and then with ovable valve stem
Change the valve position of angular travel valve.
Wherein, the execution device being made up of actuator push rod, actuator spring and actuator fulcrum, its role is to work as
The rotation of promotion valve stem actuators when rocking arm rotates to an angle around rocking arm maincenter and discharges the constraint to valve stem actuators.Institute
The mechanism of rotation torque can be provided for valve stem actuators by having, or angular travel valve eccentric valve flap structure by medium active force
Active rotation can use in this patent, and be not limited in this patent as signal use push rod, spring and dial
Pitch structure.
When pressure medium is less than less than setting pressure, i.e. pressure in piston cylinder pressure chamber in angular travel valve upstream line
When setting pressure, the axial load that elongate rod is born is less than its critical load and keeps depression bar straight line stable, the axial direction of elongate rod
Propulsive thrust is transferred to push rod, and the thrust being delivered to pressure medium through piston on piston rod maintains rocking arm to be in equilibrium-like jointly
State, valve stem actuators pass through rocking arm maincenter center to the propulsive thrust of rocking arm, and the rotary arm to rocking arm is zero, does not influence rocking arm and puts down
Weighing apparatus.Now rocking arm will not be rotated, and it is blocked valve stem actuators by the arc surface locking structure of particular design, angle stroke
Valve is in normal valve position.
When pressure medium is higher than higher than setting pressure, i.e. pressure in piston cylinder pressure chamber in angular travel valve upstream line
When setting pressure, the axial compression load that elongate rod is born will exceed its critical load, and it will occur strut buckling and loses and hold
Loading capability.Now, the propulsive thrust that elongate rod is acted on push rod can reduce suddenly, and pressure medium can promote piston and piston rod to move
It is dynamic, and promote rocking arm to be rotated around rocking arm maincenter.After rocking arm rotates to an angle around rocking arm maincenter, quilt on valve stem actuators
The position that rocking arm blocks can skid off from rocking arm in the groove of particular design, until the constraint that rocking arm loses to valve stem actuators is made
With.Now, valve stem actuators rotate under actuator spring and the effect of actuator push rod, and then with ovable valve stem by angular travel valve
Improper valve position is changed into (if angular travel valve is in standard-sized sheet position, superpressure operating mode inferior horn row under nominal situation by normal valve position
Stroke valve should close automatically, and valve position is changed into fully closed position;If angular travel valve is in fully closed position under nominal situation, under superpressure operating mode
Angular travel valve should automatically turn on, and valve position is changed into standard-sized sheet position), it is achieved thereby that during superpressure valve automatic opening or closing.
Brief description of the drawings
Fig. 1 is the main knot of the automatic valve by strut buckling trigger action of the present invention suitable for low pressure operating mode
Composition;
Fig. 2 is the automatic valve normal condition by strut buckling trigger action of the present invention suitable for low pressure operating mode
When schematic diagram;
Fig. 3 is when the automatic valve by strut buckling trigger action of the present invention suitable for low pressure operating mode triggers
Schematic diagram;
Fig. 4 is that the automatic valve by strut buckling trigger action of the present invention suitable for low pressure operating mode completes triggering
Schematic diagram afterwards;
Fig. 5 by the automatic valve use of strut buckling trigger action by being shaken suitable for low pressure operating mode of the present invention
The schematic diagram of arm configuration;
Embodiment
Suitable for the automatic valve by strut buckling trigger action of low pressure operating mode, under specifically its critical piece includes
Play pipe road 1, angular travel valve 2, upstream line 3, pressure guiding pipe 4, piston 5, piston rod 6, piston cylinder 7, push rod 8, push rod guider
9th, elongate rod 10, pole cap 11, pole cap clamper 12, rocking arm 13, rocking arm maincenter 14, position-arresting device 15, valve rod 16, valve stem actuators
17th, actuator push rod 18, actuator spring 19 and actuator fulcrum 20.
Wherein elongate rod 10 is the core of the whole automatic valve by strut buckling trigger action suitable for low pressure operating mode
Trigger unit, the core trigger part are designed based on pressure bar stabilization and strut buckling principle, have straight line stable curved with unstability
Bent two working conditions, corresponding decision automatic valve, which is in, is turned on and off valve position.The one end of elongate rod 10 is connected with push rod 8, separately
One end connects with the pole cap 11 being installed in pole cap clamper 12.When unstability bending occurs for elongate rod 10, it is steady to lose its straight line
Determine state, and and then Trigger Angle motion valve 2 improper valve position is changed into by normal valve position.
Wherein angular travel valve 2 controls the circulation of medium in upstream line 3 and downstream line 1.
The function of wherein pressure guiding pipe 4 is that the upstream line 3 of angular travel valve 2 is connected with piston cylinder 7, holds piston 5
By the pressure medium in upstream line 3.
Wherein piston 5 is connected by piston rod 6 with rocking arm 13, when piston 5 is for linear motion under pressure medium effect,
By piston rod 6 rocking arm 13 can be promoted to be rotated around rocking arm maincenter 14, discharge the effect of contraction to valve stem actuators 17, valve rod
Driver 17 rotates in the case where actuator push rod 18 and actuator spring 19 act on, and then with ovable valve stem 16 and then changes rotary motion valve
The valve position state of door 2.
Wherein one end of rocking arm 13 is fixed on rocking arm maincenter 14, can be revolved within the specific limits around rocking arm maincenter 14
Transhipment is dynamic.The upper surface of rocking arm 13 is in contact with push rod 8, and lower surface is in contact with piston rod 6.When elongate rod 10 is in straight line stabilization
During state, axial propulsive thrust that elongate rod 10 is transmitted by push rod 8 is delivered to piston rod with medium in upstream line 3 through piston 5
Thrust on 6, it is common to maintain rocking arm 13 to be in poised state, and valve stem actuators 17 to the propulsive thrust of rocking arm 13 just by shaking
The center of arm maincenter 14, the rotary arm to rocking arm 13 are zero, do not interfere with the balance of rocking arm 13.Now, rocking arm 13 will not be sent out
Raw rotation, the arc surface locking structure of its particular design can block valve stem actuators 17, even if rocking arm 13 actively does small rotation
Transhipment is dynamic, and valve stem actuators 17 will not also produce any rotation.Now, angular travel valve 2 is in normal valve position.Said structure is such as
Shown in Fig. 1.
Wherein, the execution device being made up of actuator push rod 18, actuator spring 19 and actuator fulcrum 20, it is acted on
It is to promote valve rod to drive when rocking arm 13 rotates to an angle around rocking arm maincenter 14 and discharges the constraint to valve stem actuators 17
The rotation of dynamic device 17.(all mechanisms that rotation torque is provided for valve stem actuators, or the eccentric flap knot of angular travel valve
Structure can be used in this patent by the active rotation of medium active force, and be not limited in this patent use as signal
Push rod, spring and shifting fork structure.)
Exemplified by when being used below using angular travel valve 2 as superpressure emergency decompression valve, the specific of the present invention is further described
Embodiment.
In normal conditions, angular travel valve 2 is in fully closed position, and pressure medium is less than pressure is set in upstream line 3, i.e.,
For pressure in the pressure chamber of piston cylinder 7 less than setting pressure, the axial compression load that now elongate rod 10 is born is less than its critical load
Lotus and keep straight line pressure bar stabilization, medium is through work in the axial propulsive thrust that elongate rod 10 is transmitted by push rod 8, with upstream line 3
Plug 5 is delivered to the thrust on piston rod 6, common to maintain rocking arm 13 to be in poised state, and valve stem actuators 17 are to rocking arm 13
For propulsive thrust just by the center of rocking arm maincenter 14, the rotary arm to rocking arm 13 is zero, does not interfere with the balance of rocking arm 13.This
When, rocking arm 13 keeps balance, and without rotating, the arc surface locking structure of its particular design can block valve stem actuators 17
Firmly, even if rocking arm 13 actively does small rotary motion, valve stem actuators 17 will not also produce any rotation, at angular travel valve 2
In normal valve position.As shown in Figure 2.
When pressure medium is higher than setting pressure in upstream line 3, i.e., the pressure in the pressure chamber of piston cylinder 7 is higher than setting pressure
When, the axial compression load that elongate rod 10 is born will exceed its critical load, and elongate rod 10 occurs unstability bending and loses carrying
Ability, its propulsive thrust acted on push rod 8 can reduce suddenly, and pressure medium can promote piston 5 and piston rod 6 to move.Herein
During, piston rod 6 can promote rocking arm 13 to be rotated around rocking arm maincenter 14.When rocking arm 13 rotates certain angle around rocking arm maincenter 14
After degree, because the position width that is contacted on valve stem actuators 17 with rocking arm 13 is less than the groove width designed on rocking arm 13, it will be from
Skidded off in rocking arm 13, as shown in Figure 3.Until rocking arm 13 loses the constraint to valve stem actuators 17, valve stem actuators 17 are performing
Device push rod 18 and the lower rotation of the effect of actuator spring 19, and then open angular travel valve 2 with ovable valve stem 16, so as to upstream line
Medium in 3 downstream release by pipeline 1, as shown in Figure 4.
Rocking arm 13 employs special locking structure design, and the contact surface of itself and valve stem actuators 17 is with rocking arm maincenter 14
Pivot be the center of circle arc surface, as shown in Figure 5.Valve stem actuators 17 can pass through rocking arm maincenter to the active force of rocking arm 13
14 pivot.So the power that valve stem actuators 17 are acted on rocking arm 13 is 0 to the rotary arm of rocking arm 13, it will not draw
The rotation of rocking arm 13 is played, even if when rocking arm 13 actively does small rotary motion, valve stem actuators 17 will not also produce any turn
It is dynamic, as shown in Figure 2.In addition, devise groove on rocking arm 13, as shown in figure 5, and groove width be more than on valve stem actuators 17
The position width being in contact with it.After rocking arm 13 rotates to an angle around rocking arm maincenter 14, by rocking arm on valve stem actuators 17
13 positions blocked can skid off from the groove of rocking arm 13, so as to which rocking arm 13 discharges the effect of contraction to valve stem actuators 17, such as
Shown in Fig. 3.
In addition, according to the Euler law of strut buckling, can by adjust modulus of elasticity and the slenderness ratio of elongate rod 10 and
Change its critical load, and then change setting pressure when angular travel valve 2 acts.
When the angular travel valve 2 of the present invention is designed as under superpressure operating mode automatic close, it is only necessary to which valve rod 16 is rotated into 90
Degree.Embodiment and angular travel valve 2 are designed as identical during superpressure emergency relief valve, will not be repeated here.
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Special type and/or step outside, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), except non-specifically chatting
State, can be replaced by other equivalent or with similar purpose alternative features.I.e., unless specifically stated otherwise, each feature
A simply example in a series of equivalent or similar characteristics.
The invention is not limited in foregoing embodiment.The present invention, which expands to, any in this manual to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (2)
1. a kind of automatic valve by strut buckling trigger action suitable for low pressure operating mode, its critical piece includes downstream line
(1), angular travel valve (2), upstream line (3), pressure guiding pipe (4), piston (5), piston rod (6), piston cylinder (7), push rod (8),
Push rod guider (9), elongate rod (10), pole cap (11), pole cap clamper (12), rocking arm (13), rocking arm maincenter (14), position-arresting device
(15), valve rod (16), valve stem actuators (17), actuator push rod (18), actuator spring (19), actuator fulcrum (20), its
Middle elongate rod (10) one end is connected with push rod (8), and the other end connects with the pole cap (11) being installed in pole cap clamper (12);Its
The upstream line (3) of angular travel valve (2) is connected by middle pressure guiding pipe (4) with piston cylinder (7), piston (5) is born from upper
Pressure medium in play pipe road (3);Wherein piston (5) is connected by piston rod (6) with rocking arm (13), when piston (5) is in medium
When for linear motion under pressure effect, by piston rod (6) rocking arm (13) can be promoted to be rotated around rocking arm maincenter (14), release
To the effect of contraction of valve stem actuators (17), valve stem actuators (17) act in actuator push rod (18) and actuator spring (19)
Lower rotation, and then the valve position state with ovable valve stem (16) and then change angular travel valve (2);Wherein rocking arm (13) one end is fixed on
On rocking arm maincenter (14), it can be rotated within the specific limits around rocking arm maincenter (14), rocking arm (13) upper surface and push rod
(8) it is in contact, lower surface is in contact with piston rod (6), and the thrust that piston rod (6) and push rod (8) are acted on rocking arm (13) is not
During balance, rocking arm (13) can be promoted to be rotated around rocking arm maincenter (14), the contact surface of rocking arm (13) and valve stem actuators (17) is
Arc surface using the pivot of rocking arm maincenter (14) as the center of circle, the groove width designed on rocking arm (13) are more than what is be in contact with it
Corresponding position width on valve stem actuators (17), when rocking arm (13) rotates to an angle around rocking arm maincenter (14), valve rod drives
The position contacted on dynamic device (17) with rocking arm (13) can skid off from the groove of rocking arm (13), until rocking arm (13) is discharged to valve rod
The effect of contraction of driver (17), valve stem actuators (17) are in actuator push rod (18) and actuator spring (19) effect backspin
Turn, and then change the valve position state of angular travel valve (2) with ovable valve stem (16), the automatic valve is characterised by:Elongate rod
(10) it is to determine the core trigger part whether whole automatic valve acts, when elongate rod (10) keeps straight line stable state,
Angular travel valve (2) is in normal valve position;When unstability bending occurs for elongate rod (10), triggering angular travel valve (2) is by normal
Improper valve position is changed into valve position.
2. the automatic valve by strut buckling trigger action according to claim 1 suitable for low pressure operating mode, wherein when
When elongate rod (10) is in straight line pressure bar stabilization state, the axial propulsive thrust of elongate rod (10) is transferred to push rod (8), and and medium
The thrust that pressure is delivered on piston rod (6) through piston (5) maintains rocking arm (13) to be in poised state, valve stem actuators jointly
(17) pivot of rocking arm maincenter (14) being passed through to the propulsive thrust of rocking arm (13), its rotary arm to rocking arm (13) is zero,
Rocking arm (13) balance is not influenceed, and now rocking arm (13) will not rotate, and it blocks valve stem actuators (17), angular travel valve
(2) it is in normal valve position;After elongate rod (10) occurs unstability bending and loses bearing capacity, elongate rod (10) acts on push rod
(8) propulsive thrust on can reduce suddenly, and pressure medium can promote piston (5) and piston rod (6) mobile, and promote rocking arm (13) to enclose
Rotated around rocking arm maincenter (14);After rocking arm (13) rotates to an angle around rocking arm maincenter (14), on valve stem actuators (17)
The position contacted with rocking arm (13) can skid off from the groove of rocking arm (13), until rocking arm (13) is lost to valve stem actuators (17)
Effect of contraction;Valve stem actuators (17) rotate under actuator push rod (18) and actuator spring (19) effect, band ovable valve stem
(16) angular travel valve (2) is changed into improper valve position by normal valve position.
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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 |
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CN105318054A (en) * | 2015-02-28 | 2016-02-10 | 刘海亮 | Membrane auxiliary type compression bar destabilizing pressure relief device applied to micro-pressure working condition |
CN205534510U (en) * | 2016-03-30 | 2016-08-31 | 江苏瑞朗博机械设备有限公司 | Automatic valve by depression bar unstability trigger action suitable for low pressure operating mode |
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CN101709799A (en) * | 2009-11-30 | 2010-05-19 | 湖南泵阀制造有限公司 | Multifunctional sleeve type energy dissipation valve |
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