CN106402073A - Pilot valve achieving pressure sensing and driven by corrugated pipe and having flow amplification function - Google Patents
Pilot valve achieving pressure sensing and driven by corrugated pipe and having flow amplification function Download PDFInfo
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- CN106402073A CN106402073A CN201610904616.0A CN201610904616A CN106402073A CN 106402073 A CN106402073 A CN 106402073A CN 201610904616 A CN201610904616 A CN 201610904616A CN 106402073 A CN106402073 A CN 106402073A
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- corrugated tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pilot valve achieving pressure sensing and driven by a corrugated pipe and having a flow amplification function. The pilot valve comprises a valve body, a first level pilot valve and a second level relay valve. The first level pilot valve and the second level relay valve are arranged in the valve body. A corrugated pipe assembly of the first level pilot valve is driven by thrust transmitted from a pressure source. The second level relay valve achieves the flow amplification function. The pilot valve has the beneficial effects that the no-flow design of two levels of amplification is adopted, thus the precision of opening pressure and closing pressure of a safety valve can be improved effectively, and the pilot leakage interval is reduced. The variable quantity of pressure is converted into displacement quantity, the design belongs to no-flow design, the pressure sensing end is the closed end, disturbance of fluid after the safety valve is opened can be fully reduced, the opening pressure is precise, and the repeatability is high. The second level relay valve is added to achieve the flow amplification function, the pilot leakage interval can be reduced effectively, and thus a main valve is opened fast during overpressure protection. Closing parts of the two-level pilot valve are both of a pressure self-tightening type seal structure.
Description
Technical field
The present invention relates to pilot valve technical field of structures, in particular it relates to one kind by corrugated tube pressure-sensitive and drives and has
The pilot valve of Flow amplification effect.
Background technology
Pilot operated safety valve has been developed in a variety of forms, the closing of the main valve flap of most of pilot operated safety valves so far
Power is provided by by itself fluid media (medium) of protection system.After pilot valve experiences system pressure leading action, main valve control chamber is led to
Cross pilot valve pressure release, thus driving main valve flap to open.When main valve opens discharge, system pressure reduces to after certain certain value, first
Pilot valve leading action again, the pressure release passage of cut-out main valve control chamber, main valve control chamber refills pressure medium, makes main valve valve
Lobe is closed.The function of pilot valve is exactly pressurization or the pressure release of control bound control chamber.
There is flow-type pilot valve while main valve opens discharge, fluid media (medium) is also in the internal continued emissions of pilot valve.This
When, the setting valve of pilot valve is easily affected by medium temperature and is fluctuated, and its performance depends on moving component in valve and flowing
Dynamic characteristic during body flowing, the performance parameter of pilot valve is not easily controlled.
Core pilot operated safety valve used in nuclear reactor primary Ioops system, is to ensure that nuclear reactor coolant system
And its key equipment of connected pipeline and equipment safety, very high to the reliability and accuracy requirement of its service behaviour.For guaranteeing
System equipment and the safety of pipeline, the Opening pressure of pilot valve must not have big skew.Put due to being had by protection system medium
Penetrating property, does not allow relief valve to have any internal hemorrhage due to trauma and the situation of leakage to occur, thus must assure that the sealing of valve seat and to surrounding
The sealing of environment.In order to reduce discharge and the loss of radioactivity pressure medium as far as possible, the blow pressure of relief valve also should to the greatest extent may be used
Can ground close to Opening pressure, before opening and return the good sealing of valve seat also to be ensured after seat.
Content of the invention
The technical problem to be solved be provide a kind of improve relief valve precision, no reciprocating movable sealing structure,
Reduce first leak time, self-energized seal by corrugated tube pressure-sensitive and the pilot valve that drives and have Flow amplification effect.
The present invention solves the above problems and be employed technical scheme comprise that：
A kind of by corrugated tube pressure-sensitive with the pilot valve that drives and have Flow amplification effect, for the keying of control bound, including
Valve body and be arranged at the first-stage pilot valve in valve body and second level relay valve；The inner space of described valve body along to
Under direction be divided into pressure-sensitive chamber successively by multiple dividing plates, pretension is adjusted chamber, first-stage pilot valve discharge chamber and fluid control chamber；
Dividing plate is integral with valve body, and valve body is divided into several sections, is tightly connected between each section；Separate pressure-sensitive chamber and pretension to adjust the dividing plate in chamber
The top of A is provided with corrugated tube A, the upper shed of corrugated tube A by plug welded seal, the end face of the under shed of corrugated tube A with every
Plate A welded seal connects, the valve rod of first-stage pilot valve from the under shed of corrugated tube A stretch into corrugated tube A internal and with corrugated tube A
Core rod touch, dividing plate A is provided with the through hole passing through for valve rod, and through hole be located at corrugated tube A in, thus ensureing corrugated tube A
Pressure-sensitive chamber can be insulated with dividing plate and pretension is adjusted chamber, and the lower end of valve rod sequentially passes through pretension and adjusts chamber and first-stage pilot valve
Discharge chamber；Pretension adjusts chamber and first-stage pilot valve discharge chamber is separated by dividing plate B, dividing plate B is provided with for valve rod pass through logical
The packing of another corrugated tube B chamber and first-stage pilot valve discharge chamber it is ensured that pretension is adjusted is carried on hole, and valve rod；Valve rod position
In pretension adjust the part of intracavity outer cover equipped with preloading spring A, be fixedly installed on valve rod for entering to preloading spring A upper end
The spacing baffle plate of row, pretension intracavity of adjusting is provided with bearing for supporting preloading spring A lower end, thus preloading spring A is by valve
Fixed baffle plate and be arranged at the adjust bearing of intracavity of pretension and be fixed on bar；Separate first-stage pilot valve discharge chamber and fluid
The lower surface of the dividing plate C of control chamber is provided with valve seat A, is provided through the through hole of dividing plate C in valve seat A, and the lower end of valve rod is located at
In the through hole of valve seat A；The upper surface of the base plate of valve body is provided with valve seat B, is provided through the through hole of valve body base plate in valve seat B,
Fluid controls the piston that intracavity is provided with the flap A being matched with valve seat A and fluid control chamber is divided into upper and lower two parts
A, piston A upper and lower cavity passes through the hole connection on piston, and the bottom of piston A is provided with the flap B matching with valve seat B；With valve seat A
The flap A matching is pressed on valve seat A by preloading spring B, and flap B is pressed on valve seat B by preloading spring C, piston A
The fluid of upper and lower controls intracavity all to fill flowing full body；High-pressure fluid import and the company in connection pressure-sensitive chamber are provided with valve body
The main valve control chamber import of the logical fluid control chamber being located at piston A bottom.
It is welded with the corrugated tube B with sealing function in stem lower portion, the other end of described corrugated tube B is welded in dividing plate B
On seal, prevent the emission in first-stage pilot valve discharge chamber from entering into pretension and adjust in chamber；The described first order is first
Discharge orifice is provided with pilot valve discharge chamber, described discharge orifice is used for discharging the emission in first-stage pilot valve discharge chamber.
The pilot valve of the present invention can be used in nuclear reactor primary Ioops system, during use, by high-pressure fluid import and main valve
Snout cavity connection, main valve control chamber import connect with the control chamber of main valve, by the outlet plenum company of the through hole of valve seat B and main valve
Logical.Main valve has snout cavity, outlet plenum and control chamber, is provided with valve seat C, snout cavity and control chamber between snout cavity and outlet plenum
Between by the aperture UNICOM on set piston B；The flap C matching with valve seat C is connected piston B by main valve valve rod,
The top of piston B is connected with resetting-mechanism, drives flap C to realize the opening and closing of main valve by piston B.The ripple of pressure-sensitive intracavity
The change in pipe A sensed pressure source, i.e. the change of main valve inlet cavity fluid pressure.When system pressure is less than set-pressure, the
One-level pilot valve and second level relay valve are all closed, and flap A and flap B presses in preloading spring B and the pre- of preloading spring C respectively
Fit tightly on valve seat A and valve seat B under power, the fluid being filled in piston A upper and lower controls the fluid of intracavity by flap A
With flap B sealing, this fluid is filled with the space of piston A upper and lower, thus it all plays compression to flap A, flap B
Active force, constitutes the sealing force between flap and valve seat, is pressure self-tightening sealing structure.
When system pressure reaches set-pressure, during the thrust driving corrugated tube A generation displacement transmitted at pressure source, ripple
Pipe A band ovable valve stem moves down, thus valve rod downward top pressure flap A, flap A lifts off a seat A, and first-stage pilot valve is opened, because
This plays the effect of guide's unlatching；Fluid controls the fluid of intracavity to flow into first-stage pilot valve discharge chamber by valve seat A, and from
Discharge orifice A arranges outwardly, and then piston A moves up so that flap B leaves valve in the presence of main valve control chamber flow of fluid
Seat B, second level relay valve is opened；Main valve controls the fluid of intracavity to discharge through second level relay valve, and the piston B of main valve moves upwards
Dynamic, piston B passes through main valve valve rod drive flap C and lifts off a seat C, main valve open.Second level relay valve is substantially piston A, valve
Constitute one of discharge outlet on lobe B, valve seat B, preloading spring C, main valve control chamber import, valve body lower end portion and base plate is small-sized to release
Put valve, play Flow amplification effect.
By main valve discharge system media, system pressure decline, reach blow pressure when, preloading spring A promote valve rod to
Upper motion, corrugated tube A recovery of shape, make flap A move closer to valve seat A, in the presence of preloading spring B, finally make the first order first
Pilot valve cuts out；Meanwhile, the aperture that the fluid of piston A cavity of resorption passes through on piston flows to piston A epicoele, the pressure of upper and lower intracavity
Progressively reach balance, second level relay valve is closed in the presence of preloading spring C, thus under resetting-mechanism effect, main valve weight
New closing, completes to open and close circulation.
Preferably, the fluid positioned at piston A top controls intracavity to be fixedly installed gripper shoe, gripper shoe is provided with for stream
The through hole that body passes through, preloading spring B one end presses on the lower end of flap A, and the other end of preloading spring B presses in gripper shoe,
Thus the flap A being matched with valve seat A is pressed on valve seat A by preloading spring B, preloading spring C is arranged at gripper shoe and piston A
Between, preloading spring C one end presses in gripper shoe, and the preloading spring C other end presses on piston A, thus flap B is by pretension
Spring C is pressed on valve seat B.
Preferably, the lower end of flap A is connected with guide rod, and preloading spring B is set in the outside of guide rod.
Preferably, it is provided with the swivel nut of adjusting for being guided to valve rod in valve body, be conducive to the smooth movement of valve rod；
Meanwhile, swivel nut of adjusting can carry out pretension and regulation to preloading spring A, to adjust the set-pressure of relief valve.
To sum up, the invention has the beneficial effects as follows：
1st, the present invention is arranged on nuclear power unit manostat, carries out overpressure protection by control bound to nuclear power unit；Should
Pilot valve adopts new principle and structure, is capable of the action of effective control main valve；It is by the two-stage being made within a valve body first
Pilot valve forms, and is carried out the change in sensed pressure source by airtight corrugated tube；The bellows component of first-stage pilot valve is by pressure source
The thrust that place is transmitted is driven, and second level relay valve plays Flow amplification effect；The design amplified using no flowing and two-stage, energy
Enough effectively improve the precision of opening pressure of safety valve and closing presure, and it is interval to reduce first leakage.
2nd, carry out the change in sensed pressure source using airtight bellows component, the variable quantity of pressure be changed into displacement,
Belong to no flow design, pressure-sensitive side is blind end, the disturbance of the fluid after relief valve is opened, Opening pressure essence can be substantially reduced
Really, repeatability is high；Corrugated tube, more can be effective compared with traditional reciprocating movable sealing structure used as a part for pressure boundary simultaneously
Ground sealing medium；No reciprocating movable sealing structure, it is only necessary to consider the static seal problem of structure under high-temperature and high-pressure conditions, drops significantly
The low design difficulty of valve.
3rd, it is made up of two-stage pilot valve, increased second level relay valve and play Flow amplification effect, elder generation can be efficiently reduced
Leak time, makes main valve open rapidly in overpressure protection.
4th, all using pressure self-tightening sealing structure, that is, pressure medium acts on the week of flap to the closure member of two-stage pilot valve
Enclose, system pressure is bigger, sealing force is bigger, therefore sealing property is reliable, first leak interval very little, setting valve high precision.
Brief description
Accompanying drawing described herein is used for providing the embodiment of the present invention is further understood, and constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is a kind of structural representation by corrugated tube pressure-sensitive and the pilot valve driving and having Flow amplification to act on of the present invention；
Fig. 2 is that pilot valve of the present invention controls, with main valve, the structural representation being connected enforcement；
Labelling and corresponding parts title in accompanying drawing：
1- valve body, 2- pressure-sensitive chamber, 3- pretension is adjusted chamber, 4- first-stage pilot valve discharge chamber, 5- fluid control chamber, 6- dividing plate A, 7-
Corrugated tube A, 8- valve rod, 9- dividing plate B, 10- preloading spring A, 11- baffle plate, 12- bearing, 13- dividing plate C, 14- valve seat A, 15- bottom
Plate, 16- valve seat B, 17- flap A, 18- piston A, 19- flap B, 20- preloading spring B, 21- preloading spring C, 22- high-pressure fluid
Import, 23- main valve control chamber import, 24- snout cavity, 25- outlet plenum, 26- control chamber, 27- valve seat C, 28- piston B, 29- master
Valve control chamber exports, 30- flap C, 31- main valve valve rod, 32- resetting-mechanism, 33- gripper shoe, 34- guide rod, and 35- adjusts swivel nut,
36- corrugated tube B, 37- discharge orifice.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is made with detailed description further, but embodiments of the present invention
Not limited to this.
Embodiment 1
As shown in Figure 1-2, a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect pilot valve, for control bound
Keying, including valve body 1 and be arranged at the first-stage pilot valve in valve body 1 and second level relay valve, described valve body 1 interior
Portion space is divided into pressure-sensitive chamber 2 along direction from top to bottom successively by multiple dividing plates, pretension is adjusted chamber 3, first-stage pilot valve row
Put chamber 4 and fluid control chamber 5, dividing plate is integrated with valve body 1, valve body is segment design, using being tightly connected between each section.Separate
The adjust top of dividing plate A6 in chamber 3 of pressure-sensitive chamber 2 and pretension is provided with corrugated tube A7, and the upper shed of corrugated tube A7 is welded close by plug
Envelope, the end face of the under shed of corrugated tube A7 is connected with dividing plate A6 welded seal, and the valve rod 8 of first-stage pilot valve is from corrugated tube A7's
Under shed stretches into corrugated tube A7 inside the core rod touch with corrugated tube A7, and dividing plate A6 is provided with the through hole passing through for valve rod 8,
And through hole is located in corrugated tube A7, thus ensureing corrugated tube A7 and dividing plate can insulate pressure-sensitive chamber 2 and pretension is adjusted chamber 3, valve rod 8
Lower end sequentially pass through pretension and adjust chamber 3 and first-stage pilot valve discharge chamber 4, pretension is adjusted chamber 3 and first-stage pilot valve discharge
Chamber 4 is separated by dividing plate B9, and dividing plate B9 is provided with the through hole passing through for valve rod 8, and carries corrugated tube on valve rod 8 it is ensured that pretension
The packing of chamber 3 and the first-stage pilot valve discharge chamber 4 of adjusting, the outer cover of the part that valve rod 8 is adjusted in chamber 3 positioned at pretension is equipped with pre-
Tight spring A10, is fixedly installed on valve rod 8 for carrying out spacing baffle plate 11 to preloading spring A10 upper end, pretension is adjusted in chamber 3
It is provided with the bearing 12 for supporting preloading spring A10 lower end, thus preloading spring A10 is by fixed baffle plate 11 He on valve rod 8
Be arranged at the bearing 12 that pretension adjusts in chamber 3 to be fixed, separate first-stage pilot valve discharge chamber 4 and fluid control chamber 5 every
The lower surface of plate C13 is provided with valve seat A14, is provided through the through hole of dividing plate C13 in valve seat A14, and the lower end of valve rod 8 is located at valve
In the through hole of seat A14, the upper surface of the base plate 15 of valve body 1 is provided with valve seat B16, is provided through valve body 1 base plate in valve seat B16
15 through hole, is provided with the flap A17 matching with valve seat A14 and piston A18 in fluid control chamber 5, the bottom of piston A18 sets
It is equipped with the flap B19 matching with valve seat B16, the flap A17 matching with valve seat A14 is pressed in valve seat by preloading spring B20
On A14, flap B19 is pressed on valve seat B16 by preloading spring C21, and filling flowing full body in fluid control chamber 5, on valve body 1
The high-pressure fluid import 22 being provided with connection pressure-sensitive chamber 2 controls with the main valve connecting the fluid control chamber 5 being located at piston A18 bottom
Chamber import 23.There is the corrugated tube B36 with sealing function in valve rod 8 lower weld, the other end of corrugated tube B36 is welded in dividing plate
Seal on B9, prevent the emission in first-stage pilot valve discharge chamber 4 from entering into pretension and adjust in chamber 3；Described first
It is provided with discharge orifice 37, described discharge orifice 37 is used for discharging in first-stage pilot valve discharge chamber 4 in level pilot valve discharge chamber 4
Emission.
The pilot valve of the present invention can be used in nuclear reactor primary Ioops system, during use, by high-pressure fluid import 22 and master
The snout cavity 24 of valve connects, and main valve control chamber import 23 is connected with the control chamber 26 of main valve, by the through hole of valve seat B16 and main valve
Outlet plenum connection.Main valve has snout cavity 24, outlet plenum 25 and control chamber 26, is provided between snout cavity 24 and outlet plenum 25
Valve seat C27, is provided with piston B28 between snout cavity 24 and control chamber 26, the aperture that the upper and lower fluid of piston B28 passes through on piston connects
Logical, control chamber 26 is connected with main valve control chamber outlet 29, and the flap C30 being matched with valve seat C27 is connected by main valve valve rod 31
The top of piston B28, piston B28 is connected with resetting-mechanism 32, drives flap C30 to realize unlatching and the pass of main valve by piston B28
Close.
The change in the corrugated tube A7 sensed pressure source in pressure-sensitive chamber 2, i.e. the change of main valve inlet chamber 24 fluid pressure.When
When system pressure is less than set-pressure, first-stage pilot valve and second level relay valve are all closed, and flap A17 and flap B19 is respectively
Fit tightly under the preload pressure of preloading spring B20 and preloading spring C21 on valve seat A14 and valve seat B16, fluid control chamber
Fluid in 5 is sealed by flap A17 and flap B19, and this fluid is filled with fluid control chamber 5, thus it is to flap A17, flap
B19 plays the active force of compression, constitutes the sealing force between flap and valve seat, is pressure self-tightening sealing structure.
When system pressure reaches set-pressure, during the thrust driving corrugated tube A7 generation displacement transmitted at pressure source, ripple
Stricture of vagina pipe A7 band ovable valve stem 8 moves down, thus the downward top pressure flap A17 of valve rod 8, flap A17 lifts off a seat A14, and the first order is first
Pilot valve is opened, and thereby serves to the effect of guide's unlatching, and the fluid in fluid control chamber 5 flows into first order guide by valve seat A14
Valve discharge chamber 4, and from discharge orifice 37 row outwardly.And then piston A18 moves in the presence of main valve control chamber 26 fluid upwards
Dynamic B16, the unlatching of second level relay valve so that flap B19 lifts off a seat, the fluid in main valve control chamber 26 is through second level relay valve
Discharge, the piston B28 of main valve moves up, piston B28 passes through main valve valve rod 31 drive flap C30 and lifts off a seat C27, and main valve is beaten
Open.Second level relay valve is substantially a small-sized relief valve, plays Flow amplification effect.
System media is discharged by main valve, system pressure declines, when reaching blow pressure, preloading spring A10 promotes valve rod 8
Move upwards, corrugated tube A7 recovery of shape, make flap A17 move closer to valve seat A14, finally in the presence of preloading spring B20
First-stage pilot valve is made to close；Meanwhile, the aperture that the medium of piston A18 cavity of resorption passes through on piston flows into piston A18 epicoele, piston
The pressure of the upper and lower intracavity of A18 reaches balance, and second level relay valve is closed in the presence of preloading spring C21, in resetting-mechanism 32
Under effect, main valve is re-closing off, and completes to open and close circulation.
Embodiment 2
As shown in figure 1, a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect pilot valve, in the base of embodiment 1
On plinth, it is fixedly installed gripper shoe 33 in the fluid control chamber 5 on piston A18 top, gripper shoe 33 is provided with and supplies fluid
The through hole passing through, preloading spring B20 one end presses on the lower end of flap A17, and the other end of preloading spring B20 presses on gripper shoe
On 33, thus the flap A17 being matched with valve seat A14 is pressed on valve seat A14 by preloading spring B20, preloading spring C21 is arranged
Between gripper shoe 33 and piston A18, preloading spring C21 one end presses in gripper shoe 33, and the preloading spring C21 other end compresses
On piston A18, thus flap B19 is pressed on valve seat B16 by preloading spring C21,
Embodiment 3
As shown in figure 1, a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect pilot valve, in the base of embodiment 1
On plinth, the lower end of flap A17 is connected with guide rod 34, and preloading spring B20 is set in the outside of guide rod 34.
Embodiment 4
As shown in figure 1, a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect pilot valve, in the base of embodiment 1
On plinth, it is provided with the swivel nut 35 of adjusting for being guided to valve rod 8 in valve body 1, beneficial to the smooth movement of valve rod 8.Meanwhile, whole
Determine swivel nut and can carry out pretension and regulation to preloading spring A, to adjust the set-pressure of relief valve.
Above-described specific embodiment, has been carried out to the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be should be understood that the specific embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., all should comprise
Within protection scope of the present invention.
Claims (4)
1. a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect pilot valve it is characterised in that include valve body（1）
And it is arranged at valve body（1）Interior first-stage pilot valve and second level relay valve, described valve body（1）Inner space along from upper
To under direction be divided into pressure-sensitive chamber successively by multiple dividing plates（2）, pretension adjusts chamber（3）, first-stage pilot valve discharge chamber（4）With
Fluid control chamber（5）；Described separation pressure-sensitive chamber（2）Adjust chamber with pretension（3）Dividing plate A（6）Top corrugated tube A is installed
（7）, described corrugated tube A（7）Upper shed by plug welded seal, described corrugated tube A（7）The end face of under shed and dividing plate A
（6）Welded seal connects；The valve rod of described first-stage pilot valve（8）With corrugated tube A（7）Core rod touch, described valve rod（8）'s
Lower end segmentation sequentially passes through pretension and adjusts chamber（3）With first-stage pilot valve discharge chamber（4）；Pretension is adjusted chamber（3）With the first order first
Pilot valve discharge chamber（4）By dividing plate B（9）Separate；Described valve rod（8）Adjust chamber positioned at pretension（3）The outer cover of interior part equipped with
Preloading spring A（10）, described preloading spring A（10）By valve rod（8）Upper fixed baffle plate（11）Adjust chamber with being arranged at pretension（3）
Interior bearing（12）It is fixed；Separate first-stage pilot valve discharge chamber（4）With fluid control chamber（5）Dividing plate C（13）Under
Surface is provided with valve seat A（14）, described valve rod（8）Lower end be located at valve seat A（14）Interior, with valve seat A（14）The flap A matching
（17）By preloading spring B（20）It is pressed in valve seat A（14）On；Valve body（1）Base plate（15）Upper surface be provided with valve seat B
（16）, by fluid control chamber（5）It is divided into the piston A of upper and lower two parts（18）Bottom be provided with and valve seat B（16）Match
The flap B closing（19）, described flap B（19）By preloading spring C（21）It is pressed in positioned at valve seat B（16）On, piston A（18）Top
Fluid control chamber with bottom（5）Inside it is filled with fluid media (medium)；Described valve body（1）On be provided with connection pressure-sensitive chamber（2）High pressure
Fluid inlet（22）It is located at piston A with connecting（18）The fluid control chamber of bottom（5）Main valve control chamber import（23）；
In valve rod（8）Lower weld has the corrugated tube B with sealing function（36）, described corrugated tube B（36）The other end welding
In dividing plate B（9）On seal, prevent first-stage pilot valve discharge chamber（4）In emission enter into pretension and adjust chamber（3）
In；Described first-stage pilot valve discharge chamber（4）On be provided with discharge orifice（37）, described discharge orifice（37）For discharging the first order
Pilot valve discharge chamber（4）In emission.
2. according to claim 1 a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect pilot valve, its
It is characterised by, described piston A（18）The fluid control chamber on top（5）Inside it is fixedly installed gripper shoe（33）, gripper shoe（33）
On be provided with the through hole passing through for fluid；Preloading spring B（20）One end presses on flap A（17）Lower end, preloading spring B（20）
The other end press on gripper shoe（33）On；Preloading spring C（21）One end presses on gripper shoe（33）On, preloading spring C（21）
The other end presses on piston A（18）.
3. according to claim 1 a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect pilot valve, its
It is characterised by, described flap A（17）Lower end be connected with guide rod（34）, preloading spring B（20）It is set in guide rod（34）Outer
Portion.
4. according to any one of claim 1-3 a kind of by corrugated tube pressure-sensitive and drive and have Flow amplification effect elder generation
Pilot valve is it is characterised in that described valve body（1）Inside it is provided with for valve rod（8）Guided and to preloading spring A（10）Enter
The swivel nut of adjusting of row pretension（35）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610904616.0A CN106402073B (en) | 2016-10-18 | 2016-10-18 | It is a kind of by bellows pressure-sensitive and drive and with Flow amplification effect pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610904616.0A CN106402073B (en) | 2016-10-18 | 2016-10-18 | It is a kind of by bellows pressure-sensitive and drive and with Flow amplification effect pilot valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106402073A true CN106402073A (en) | 2017-02-15 |
| CN106402073B CN106402073B (en) | 2018-02-06 |
Family
ID=58013419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610904616.0A Active CN106402073B (en) | 2016-10-18 | 2016-10-18 | It is a kind of by bellows pressure-sensitive and drive and with Flow amplification effect pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106402073B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753795A (en) * | 2017-07-03 | 2020-02-04 | 列奥纳多股份公司 | Relief valve and method for controlling a hydraulic circuit |
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| US20060021656A1 (en) * | 2004-08-02 | 2006-02-02 | Smc Corporation | Vacuum regulating valve |
| CN201373150Y (en) * | 2009-01-15 | 2009-12-30 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
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| GB945477A (en) * | 1959-03-09 | 1964-01-02 | Hagan Controls Ltd | A pilot-valve controlled fluid pressure regulating valve |
| CN1080984A (en) * | 1993-06-06 | 1994-01-19 | 樊东升 | Self-operated fluid full-control valve |
| CN2217711Y (en) * | 1994-10-13 | 1996-01-17 | 甘靖 | Multi-stage guide valve |
| CN1214428A (en) * | 1997-10-13 | 1999-04-21 | 赵文轩 | Leakless safety valve |
| US20060021656A1 (en) * | 2004-08-02 | 2006-02-02 | Smc Corporation | Vacuum regulating valve |
| CN201373150Y (en) * | 2009-01-15 | 2009-12-30 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753795A (en) * | 2017-07-03 | 2020-02-04 | 列奥纳多股份公司 | Relief valve and method for controlling a hydraulic circuit |
| CN110753795B (en) * | 2017-07-03 | 2021-11-30 | 列奥纳多股份公司 | Relief valve and method for controlling a hydraulic circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106402073B (en) | 2018-02-06 |
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