CN108799582A - Compound pressure reducing valve - Google Patents
Compound pressure reducing valve Download PDFInfo
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- CN108799582A CN108799582A CN201811004999.1A CN201811004999A CN108799582A CN 108799582 A CN108799582 A CN 108799582A CN 201811004999 A CN201811004999 A CN 201811004999A CN 108799582 A CN108799582 A CN 108799582A
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 53
- 230000001105 regulatory effect Effects 0.000 claims abstract description 42
- 230000006837 decompression Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 10
- 210000005069 ears Anatomy 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000686 essence Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
Compound pressure reducing valve provided by the invention, including valve body, the valve body is interior to be equipped with coaxial opposite two-stage decompression unit：First order decompressing unit and second level decompressing unit, it is both provided with pressure executive component in the first order decompressing unit and second level decompressing unit, pressure-regulating device is arranged in pressure executive component one end, flap headstock gear is arranged in the other end, and the first order decompressing unit is connected to second level decompressing unit by runner built in valve body.Two groups of decompressing units of setting optimize combinations of pairs in valve body of the present invention, and valve is enable to realize the pressure-reduced and-regulated of outlet end in wider pressure range.
Description
Technical field
The present invention relates to valve technology field more particularly to a kind of compound pressure reducing valves.
Background technology
Pressure reducing valve is by adjusting, inlet pressure being reduced to the outlet pressure of a certain needs, and by the energy of medium itself
Amount, makes outlet pressure automatically keep stable valve.It is mainly GB/T12244 that the pressure reducing valve in China market, which executes standard, at present
《Pressure reducing valve generally requires》And GB/T12245《Pressure reducing valve method for testing performance》, it is in inlet pressure for pressure characteristic requirement
80%-105% between when changing, the variation range of outlet pressure is 10%（Directacting reducing valve）Or 5%（Pilot-operated type depressurizes
Valve）.And in engineering project, actual condition is that the variation range of inlet pressure is wider, and sometimes high-low pressure ratio reaches 5 times or so.
If being difficult at this time to stablize outlet pressure in setting value by single valve.In the prior art, also have using the concatenated method of multistage valve
It solves the above problems, but practical effect is also unsatisfactory, not only increase project cost and installation space, and type selecting
Matching, adjusting maintenance are all extremely complex, and degree of regulation is not also high.
Invention content
For the above-mentioned prior art the shortcomings that, the object of the present invention is to provide a kind of compound pressure reducing valve, compact overall structure,
It is easily installed, facilitates adjusting, valve is enable to realize the pressure-reduced and-regulated of outlet end in wider pressure range.
To achieve the goals above, technical scheme is as follows：
Compound pressure reducing valve, including valve body, which is characterized in that coaxial opposite two-stage decompression unit is equipped in the valve body：First
Grade decompressing unit and second level decompressing unit is both provided with pressure in the first order decompressing unit and second level decompressing unit and holds
Pressure-regulating device is arranged in units, pressure executive component one end, and flap headstock gear, the first order is arranged in the other end
Decompressing unit is connected to second level decompressing unit by runner built in valve body.
Further, in above-mentioned compound pressure reducing valve, the pressure executive component is piston or diaphragm.
Further, in above-mentioned compound pressure reducing valve, when the pressure executive component is piston, the first order decompression is single
First pressure regulating device is set in member below first piston, and the first pressure regulating device includes first time spring, fixed
The lower spring cup of first time spring, and the first adjusting rod for being connect with lower spring cup, first adjusting rod are integrally placed at valve
In vivo；First flap headstock gear is set above the first piston, and the first flap headstock gear includes the first valve seat, institute
The first valve seat and the first valve flap contacts are stated, valve rod is connected at the top of first flap, send setting first above the first valve seat
Auxiliary spring, first auxiliary spring are placed in auxiliary spring fulcrum bearing.
Further, in above-mentioned compound pressure reducing valve, when the pressure executive component is piston, the second level decompression is single
Second pressure regulating device is set in member above second piston, and the second pressure regulating device includes spring on first, fixed
The upper spring seat of spring on first, and the adjusting screw rod that is connect with upper spring seat, the adjusting screw rod by the first nut to
It is stretched out outside valve body；Second flap headstock gear is set below the second piston, the structure of the second flap headstock gear with
The structure of the first flap headstock gear is identical.
Further, in above-mentioned compound pressure reducing valve, feedback hole is equipped in the middle part of the valve stem tip.
Further, in above-mentioned compound pressure reducing valve, first valve seat and the first flap are in sealing contact by gasket.
Further, in above-mentioned compound pressure reducing valve, first valve seat and the first flap are respectively dismountable unit mould
Block.
Further, in above-mentioned compound pressure reducing valve, second adjusting rod is externally provided with protective case.
Further, in above-mentioned compound pressure reducing valve, when the pressure executive component is diaphragm, the second level decompression is single
Second pressure regulating device is arranged in the second diaphragm in member, and the second pressure regulating device includes spring on second, fixed
The spring base of spring on second, and the adjusting screw rod that is connect with spring base, the adjusting screw rod is by third nut to valve body
Outer stretching；Second flap headstock gear is set below second diaphragm, the second flap headstock gear includes the second valve seat,
The second auxiliary spring is arranged in second valve seat and the second valve flap contacts, the second flap lower section.
Further, in above-mentioned compound pressure reducing valve, when the pressure executive component is diaphragm, the first order decompression is single
First pressure regulating device is set in member below the first diaphragm, and the first pressure regulating device includes second time spring, with institute
The regulating valve stem of second time spring connection is stated, the regulating valve stem is integrally set by valve stem nut, elastic cylindrical pin and adjusting ring
In in valve body；The first flap headstock gear, the structure of the first flap headstock gear and institute is arranged in first diaphragm
The structure for stating the second flap headstock gear is identical.
Further, in above-mentioned compound pressure reducing valve, second diaphragm lower surface is equipped with pressing sleeve under diaphragm, and upper surface is equipped with
Diaphragm top board, correspondingly, first diaphragm upper surface are equipped with pressing sleeve under diaphragm, and lower surface is equipped with diaphragm top board.
Further, in above-mentioned compound pressure reducing valve, pressing sleeve and diaphragm top board are that no axial aperture structure is set under the diaphragm
It sets.
Further, it in above-mentioned compound pressure reducing valve, is equipped between first diaphragm and the second diaphragm and the valve body
Dottle pin.
Further, in above-mentioned compound pressure reducing valve, O-ring is equipped between second valve seat and valve body.
Further, in above-mentioned compound pressure reducing valve, the interface section of the valve body and external pipeline is in the finned knot of multilayer
Structure.
Further, in above-mentioned compound pressure reducing valve, bottom flange, the second level are arranged with outside the first order decompressing unit
It is arranged with bonnet, outside decompressing unit.
Further, in above-mentioned compound pressure reducing valve, the bonnet, is fixed by studs and the second nut with valve body
Connection.
Further, in above-mentioned compound pressure reducing valve, ears stop pad is additionally provided between the studs and the second nut
Circle.
Compared with prior art, compound pressure reducing valve provided by the invention, valve body is interior to be equipped with coaxial opposite two-stage decompression list
Member：First order decompressing unit and second level decompressing unit are respectively provided in the first order decompressing unit and second level decompressing unit
There are pressure executive component, pressure executive component one end that pressure-regulating device is set, flap headstock gear, institute is arranged in the other end
First order decompressing unit is stated to be connected to by runner built in valve body with second level decompressing unit.Two groups of decompressions are set in valve body of the present invention
Unit optimizes combinations of pairs, and valve is enable to realize the pressure-reduced and-regulated of outlet end in wider pressure range.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Description of the drawings
Fig. 1：Dual Piston type structure of relief pressure valve schematic diagram of the embodiment of the present invention；
Fig. 2：Valve seat of the embodiment of the present invention divides into the structural schematic diagram of support spring；
Fig. 3：The schematic cross-section in valve stem tip middle part feedback-less hole in the prior art；
Fig. 4：The schematic cross-section of setting feedback hole in the middle part of valve stem tip of the embodiment of the present invention；
Fig. 5：The compound diaphragm type structure of relief pressure valve schematic diagram of the embodiment of the present invention；
Fig. 6：The interface section structural schematic diagram of valve body of the embodiment of the present invention and external pipeline；
1, bottom flange；2, lower spring cup；3, the first adjusting rod；4, first time spring；5, valve body；6, first piston；7, valve rod；8,
First valve seat；9, gasket；10, the first flap；11, the first auxiliary spring；12, auxiliary spring fulcrum bearing；13, bonnet,；14, first
Upper spring；15, upper spring seat；16, protective case；17, the second adjusting rod；18, the first nut；19, studs；20, the second spiral shell
It is female；21, lock washer with double ears；22, O-ring；23, O-ring；24, O-ring；25, O-ring；26, second piston；27, feedback hole；
28, the second diaphragm；29, spring on second；30, spring base；31, adjusting screw rod；32, third nut；33, the second valve seat；34,
Two flaps；35, the second auxiliary spring；36, O-ring；37, dottle pin；38, pressing sleeve under diaphragm；39, diaphragm top board；40, first every
Film；41, second time spring；42, regulating valve stem；43, valve stem nut；44, elastic cylindrical pin；45, adjusting ring.
Specific implementation mode
In order to make the technical problems, technical solutions and beneficial effects solved by the present invention be more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Compound pressure reducing valve provided by the invention, including valve body 5, the valve body 5 is interior to be equipped with coaxial opposite two-stage decompression list
Member：First order decompressing unit and second level decompressing unit are respectively provided in the first order decompressing unit and second level decompressing unit
There are pressure executive component, pressure executive component one end that pressure-regulating device is set, flap headstock gear, institute is arranged in the other end
First order decompressing unit is stated to be connected to by runner built in valve body with second level decompressing unit.Two groups of decompressions are set in valve body of the present invention
Unit optimizes combinations of pairs, and valve is enable to realize the pressure-reduced and-regulated of outlet end in wider pressure range.
The embodiment of the present invention uses recombiner unit structure, valve body cavity to need to process built-in deep hole stream due to valve inner
Road, drilling cutters are easily broken off when conventional machining, and positional precision cannot guarantee that, so present invention employs special tooling folders
Have to ensure the working depth and positional precision of runner.
Preferably, in the compound pressure reducing valve of the present invention, the pressure executive component is piston or diaphragm.
As shown in Figure 1, when pressure executive component is piston, Dual Piston type pressure reducing valve provided in an embodiment of the present invention,
First pressure regulating device, the first pressure regulating device packet is arranged in 6 lower section of first piston in the first order decompressing unit
First time spring 4 is included, the lower spring cup 2 of first time spring 4 is fixed, and the first adjusting rod 3 being connect with lower spring cup 2, institute
The first adjusting rod 3 is stated to be integrally placed in valve body 5；The first flap headstock gear, first valve is arranged in 6 top of the first piston
Valve headstock gear includes the first valve seat 8, and first valve seat 8 is contacted with the first flap 10, first flap, 10 top connection
There is valve rod 7, send 8 top of the first valve seat that the first auxiliary spring 11 is set, first auxiliary spring 11 is placed in auxiliary spring fulcrum bearing 12
On.
Further, in above-mentioned Dual Piston type pressure reducing valve, 26 top of second piston is set in the second level decompressing unit
Set second pressure regulating device, the second pressure regulating device includes spring 14 on first, fixes the upper of spring 14 on first
Spring base 15, and the second adjusting rod 17 for being connect with upper spring seat 15, second adjusting rod 17 by the first nut 18 to
It is stretched out outside valve body 5；The second flap headstock gear, the structure of the second flap headstock gear is arranged in 26 lower section of the second piston
It is identical with the structure of the first flap headstock gear.
Preferably, the pressure executive component of every group of unit of the embodiment of the present invention uses stainless steel pistons, because piston has height
Intensity and high rigidity, can bear it is higher use pressure, expand the application range of valve of the present invention.In mechanical processing, by
Piston structure is used in the embodiment of the present invention, therefore the matching surface of valve body and piston, valve rod and valve seat has higher required precision,
The present invention carries out Precision Machining using specialized nc machine tool, both ensure that the higher finish of mating surface, in turn ensures size essence
Degree and concentricity requirement.
During the present invention is implemented, main spring is set below first piston 6（Such as first time spring 4）, by the pressure of main spring
Contracting elastic force and the feedback pressure of plunger shaft are compared, and the aperture of flap is controlled, to adjust the pressure of outlet end.Preferably,
Since spring is in for a long time under alternate stress effect, pressure reducing valve of the embodiment of the present invention, which requires it not only, has higher tired pole
Limit, yield point, enough impact flexibility, excellent quenching degree, low superheated susceptivity and it is not easy the performances such as decarburization, it is necessary to have
Good anticorrosion and heat safe performance.Because pressure-relief valve spring uses 65Mn and 304/316 stainless steel materials in the prior art,
Partial function can only be met, therefore spring of the embodiment of the present invention uses 17-7PH PH stainless steel materials, which is one
Kind of precipitation-hardening stainless steel has the characteristics that antifatigue, high temperature resistant, etch-proof three big.
As shown in Fig. 2, during the present invention is implemented, support spring is equipped with above the first valve seat 8（Such as the first auxiliary spring 11）, tool
There is the function of response pressure variation and auxiliary seal, while having mitigated the impact of flow so that the unlatching of flap is more steady.
In implementation, first order decompressing unit and second level decompressing unit can correspond to high pressure in valve body of the embodiment of the present invention 5
Regulatory region and low pressure regulatory region, the pressure that different proportion is carried out according to operating mode are distributed.High voltage adjusting of embodiment of the present invention area first
Pressure-regulating device can save installation space by the way that the first adjusting rod 3 is designed to that dark bar is adjusted；Low pressure regulatory region second pressure
Regulating device can be moved up and down by the second adjusting rod 17 carries out rising stem (RS.) adjusting, convenient for fine-tuning.In implementation, according to pressure point
Match, height of embodiment of the present invention pressure area can select the main spring of different pressures grade respectively, right by pressure, realize high-low pressure
Between pressure adjust, and then determine pressure reducing valve pressure-reduced and-regulated function.
Further, in above-mentioned Dual Piston type pressure reducing valve, 7 top middle portion of the valve rod is equipped with feedback hole 27.The present invention
Embodiment is axially punched in the middle part of valve rod, using discharging type balanced design, is effectively reduced seat load, is protected valve seal
Face extends the service life of valve seat, while but also pressure adjusting is sensitiveer.
As shown in figure 3, if 7 top middle portion of valve rod does not have a feedback hole 27, pressure F=（P1- P2）S1.
As shown in figure 4, if 7 top middle portion of valve rod is equipped with feedback hole 27, pressure F'=（S1-S2）P1+P2S2-P2S1=
（P1-P2）S1-S2（P1- P2）=（P1-P2）（S1-S2）=F-S2（P1-P2)）< F.
Preferably, when P2=0, then F'=P1（S1-S2）, and F=P1S1.As can be seen that equipped with feedback hole pressure-reducing valve shaft to
Power greatly reduces, and protects valve sealing face.
The operation principle of Dual Piston type pressure reducing valve of the embodiment of the present invention is as follows：Before valve debugging, spring is in freedom
State, the first flap 10 close outlet, high-pressure inlet fluid is closed in cavity of resorption at this time under the action of the first auxiliary spring 11
In.The first adjusting rod 3 is rotated, drives lower spring cup 2 to rise first time spring 4 of compression, and then first piston 6 is pushed to act, the
One piston 6 pushes 7 uplink of valve rod, opens the first flap 10, and fluid enters plunger shaft, flows into epicoele by inner flow passage, realizes
Level-one depressurizes.The high-pressure fluid in plunger shaft is by the feedback hole 27 at 7 middle part of valve rod simultaneously, into the bottom of the first flap 10,
Balance a part of axial force so that the adjusting of flap aperture is more convenient.Similarly, it into the fluid of epicoele, is adjusted second
On bar 17 and first under the action of spring 14, after two-stage decompression, outlet is flow to by valve channel.The embodiment of the present invention by
With different-stiffness first on spring 14, first time spring 4 and the first auxiliary spring 11, the pressure for controlling decompressing units at different levels match
Than and off-load valve rod equilibrium response, and then realize the adjustable range of this valve pressure.
Further, in above-mentioned Dual Piston type pressure reducing valve, first valve seat, 8 and first flap 10 passes through gasket 9
It is in sealing contact.Since the execution unit of the embodiment of the present invention is elastic soft sealing structure, applied in implementing more O-shaped
Sealing ring and rubber gasket, such as the O-ring 22 being arranged between auxiliary spring fulcrum bearing 12 and valve body in Fig. 1, auxiliary spring bearing
O-ring 24 and first piston 6 is arranged in the O-ring 23 being arranged between seat 12 and the first valve seat 8 between first valve seat 8 and valve body
O-ring 22 being arranged between valve body etc..The rubber pad of the piston packing and primary seal that are wherein applied to dynamic sealing is particularly
Important, these rubber parts are other than it will ensure the performance indicators such as necessary tensile strength, elongation, hardness, anti-aging, due to core
Its medium of valve for power station door is not only corrosive, but also bears the irradiation centainly measured, therefore, for operating mode of the present invention, this hair
Bright embodiment, which is selected, corrosion-resistant but also radiation resistance and can reach specific rubber-ethylene-propylene diene copolymer of expected service life
EPDM, and tested by irradiation test, folding resistant test, static life test, Hot Life, it was demonstrated that it can meet making for nuclear power station
With requiring.
Further, in above-mentioned Dual Piston type pressure reducing valve, first valve seat, 8 and first flap 10 is respectively detachable
Unit module.In implementation, valve seat of the embodiment of the present invention and flap design at unit module, can with integral demounting, interchangeability compared with
By force, it is convenient for product to install and safeguard.And valve seat is assembled under flap unit module line, has also saved the work of installation simultaneously
Amount, it is easier to which the flexibility of the sealing condition of macroscopic examination sealing surface, the pretightning force of spring and flap movement ensure that assembly essence
Degree.
Further, as shown in Figure 1, being additionally provided with protective case 16 outside second adjusting rod 17.
In addition, for valve body and piston, since valve working condition pressure of the present invention is higher ranked, it is contemplated that nuclear grade valve
High security, the embodiment of the present invention selects forging valve body and piston for this valve.Forging has good mechanical property, gold
Belong to blank tissue after forging method thermal processing distortion, institutional framework becomes even closer, original in steel ingot to be segregated, dredge
Compacting and soldering, substantially increase the plasticity and mechanical property of metal after the defects of pine, stomata, slag inclusion is forged.
As shown in figure 5, when the pressure executive component is diaphragm, compound diaphragm type decompression provided in an embodiment of the present invention
In valve, second pressure regulating device is arranged in 28 top of the second diaphragm in the second level decompressing unit, and the second pressure is adjusted
Device includes spring 29 on second, fixes the spring base 30 of spring 29 on second, and the adjusting screw rod being connect with spring base 30
31, the adjusting screw rod 31 is stretched out by third nut 32 to outside valve body 5；Second diaphragm, 28 lower section the second flap of setting opens
Device is closed, the second flap headstock gear includes the second valve seat 33, and second valve seat 33 is contacted with the second flap 34, described
The second auxiliary spring 35 is arranged in second flap, 34 lower section.
Further, in above-mentioned compound diaphragm type pressure reducing valve, when the pressure executive component is diaphragm, the first order
First pressure regulating device is arranged in 40 lower section of the first diaphragm in decompressing unit, and the first pressure regulating device includes second time bullet
Spring 41, the regulating valve stem 42 being connect with second time spring 41, the regulating valve stem 42 pass through valve stem nut 43, elastic cylinder
Pin 44 and adjusting ring 45 are integrally placed in valve body 5；First diaphragm, 40 the first flap headstock gear of top setting, described first
The structure of flap headstock gear is identical with the structure of the second flap headstock gear.
The embodiment of the present invention is using diaphragm as pressure executive component, because pressure is relatively low, diaphragm is suitable for pressure
Variation, reaction are sensitiveer.
The embodiment of the present invention is segmented two-stage decompression, gradually reduces pressure.It is similar to piston reducing valve, the embodiment of the present invention
Different decompression regulative modes is also respectively adopted in the two-stage decompression unit of diaphragm type pressure reducing valve, and higher level is rising stem type, and subordinate is dark
Rod-type saves space, facilitates adjusting.
The embodiment of the present invention, to support flap, provides auxiliary seal in 34 the second auxiliary spring of following settings 35 of the second flap,
Coordinate main spring simultaneously（Spring 29 on such as second）The impact of flow is mitigated, the unlatching of flap is more steady.Preferably, this hair
Bright embodiment flap hermetic unit is using whole rubber-wrapping structure, and light secured, sealing effect is good.
Further, in above-mentioned compound diaphragm type pressure reducing valve, 28 lower surface of the second diaphragm is equipped with pressing sleeve 38 under diaphragm,
Upper surface is equipped with diaphragm top board 39, and correspondingly, 40 upper surface of the first diaphragm is equipped with pressing sleeve 38 under diaphragm, and lower surface is equipped with
Diaphragm top board 39.Preferably, pressing sleeve 38 and diaphragm top board 39 are no axial aperture structure setting under the diaphragm.The present invention is real
A diaphragm is applied up and down using the pressure plare of no axial aperture structure, is compared conventional nut compression type, has been prevented axial leakage, greatly improved
Safety.Meanwhile the weight of diaphragm assembly is alleviated, adapt to low pressure operating mode.
Further, in above-mentioned compound diaphragm type pressure reducing valve, first diaphragm, 40 and second diaphragm 28 and the valve body 5
Between be equipped with dottle pin 37.
Further, in above-mentioned compound diaphragm type pressure reducing valve, O-ring 36 is equipped between second valve seat 33 and valve body 5.
The operation principle of the compound diaphragm type pressure reducing valve of the embodiment of the present invention is as follows：Before valve debugging, spring is in freedom
State, the second flap 34 close outlet, high-pressure inlet fluid is closed in cavity of resorption at this time under the action of the second auxiliary spring 35
In.Rotating regulation valve bar 42 compresses second time spring 41, and then pushes the action of the first diaphragm 40, opens the second flap 34, fluid
Into diaphragm cavity, epicoele is flowed by inner flow passage, realizes level-one decompression.Similarly, into the fluid of epicoele, adjusting screw rod is being stated
On 31 and second under the action of spring 29, after two-stage decompression, outlet is flow to by valve channel.
Specifically, the compound diaphragm type pressure reducing valve pressure characteristic test data of the present invention is as follows：
| Import（KPA） | Outlet（KPA） | Flow（L/MIN） |
| 19.13 | 13.14 | 14.3 |
| 19.11 | 13.20 | 14.3 |
| 19.13 | 13.21 | 14.2 |
| 19.14 | 13.22 | 14.3 |
| 24.00 | 14.28 | 14.9 |
| 24.00 | 14.31 | 14.9 |
| 23.99 | 14.28 | 14.9 |
| 24.00 | 14.25 | 14.9 |
| 69.11 | 14.41 | 15.0 |
| 69.00 | 14.61 | 15.1 |
| 69.06 | 14.35 | 15.1 |
| 69.09 | 14.50 | 15.1 |
As seen from the above, valve of the embodiment of the present invention can realize outlet side pressure in wider input end pressure range
The pressure-reduced and-regulated of power, fully meets code requirement.
As shown in fig. 6, valve body of the embodiment of the present invention 5 and the interface section of external pipeline are designed to multilayer fin structure,
To reinforce heat dissipation, when preventing interface pipeline from welding, excessively high heating power is transmitted to valve inner, damages rubber seal.
Further, as shown in Figure 1 and Figure 5, bottom flange 1, the second level are arranged with outside the first order decompressing unit
It is arranged with bonnet, 13 outside decompressing unit.As shown in Figure 1, the bonnet, 13 passes through studs 19 and the second nut 20 and valve
Body 5 is fixedly connected.
Preferably, as shown in Figure 1, being additionally provided with lock washer with double ears 21 between the studs 19 and the second nut 20.
Preferably, valve body of embodiment of the present invention valve deck uses stainless steel forgings valve body valve deck, and institutional framework is close, metal
Good mechanical performance can bear higher pressure, fully meet the quality safety demand of nuclear grade valve.
To sum up, the compound pressure reducing valve of the present invention, two groups of decompressing units of the interior setting of valve body optimize combinations of pairs, enable valve
Enough pressure-reduced and-regulateds that outlet end is realized in wider pressure range.Two groups of decompressing units of the invention are divided into high voltage adjusting area
With low pressure regulatory region, the high voltage adjusting area is designed to that dark bar is adjusted, and saves installation space, and low pressure regulatory region is adjusted for rising stem (RS.),
Convenient for fine-tuning.It in implementation, is distributed according to pressure, high-low pressure area selects the spring of different pressures grade respectively, passes through pressure
It is right, realize that the pressure between high-low pressure is adjusted.In addition, main spring is arranged above pressure executive component in the present invention, by main bullet
The compression elasticity of spring and the feedback pressure of intracavitary are compared, and the aperture of flap is controlled, to adjust the pressure of outlet end.In valve
Seat lower section is equipped with support spring, has the function of response pressure variation and auxiliary seal, while having mitigated the impact of flow so that
The unlatching of flap is more steady.Flap of the present invention uses discharging type balanced design, is effectively reduced seat load, protects valve
Sealing surface extends the service life of valve seat.And valve seat and flap design be at unit module, can with integral demounting, interchangeability compared with
By force, it is convenient for product to install and safeguard.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (18)
1. compound pressure reducing valve, including valve body（5）, which is characterized in that the valve body（5）It is interior to be equipped with coaxial opposite two-stage decompression list
Member：First order decompressing unit and second level decompressing unit are respectively provided in the first order decompressing unit and second level decompressing unit
There are pressure executive component, pressure executive component one end that pressure-regulating device is set, flap headstock gear, institute is arranged in the other end
First order decompressing unit is stated to be connected to by runner built in valve body with second level decompressing unit.
2. compound pressure reducing valve according to claim 1, which is characterized in that the pressure executive component is piston or diaphragm.
3. compound pressure reducing valve according to claim 2, which is characterized in that when the pressure executive component is piston, institute
State first piston in first order decompressing unit（6）First pressure regulating device, the first pressure regulating device packet is arranged in lower section
Include first time spring（4）, fix first time spring（4）Lower spring cup（2）, and and lower spring cup（2）The first of connection is adjusted
Pole（3）, first adjusting rod（3）It is integrally placed at valve body（5）It is interior；The first piston（6）Top is arranged the first flap and opens
Device is closed, the first flap headstock gear includes the first valve seat（8）, first valve seat（8）With the first flap（10）Contact,
First flap（10）Top is connected with valve rod（7）, send the first valve seat（8）The first auxiliary spring is arranged in top（11）, described
First auxiliary spring（11）It is placed in auxiliary spring fulcrum bearing（12）On.
4. compound pressure reducing valve according to claim 3, which is characterized in that when the pressure executive component is piston, institute
State second piston in the decompressing unit of the second level（26）Second pressure regulating device, the second pressure regulating device packet is arranged in top
Include spring on first（14）, fix spring on first（14）Upper spring seat（15）, and and upper spring seat（15）The of connection
Two adjusting rods（17）, second adjusting rod（17）Pass through the first nut（18）To valve body（5）Outer stretching；The second piston
（26）The second flap headstock gear, the structure of the second flap headstock gear and the first flap headstock gear is arranged in lower section
Structure it is identical.
5. compound pressure reducing valve according to claim 3, which is characterized in that the valve rod（7）Top middle portion is equipped with feedback hole
（27）.
6. compound pressure reducing valve according to claim 3, which is characterized in that first valve seat（8）With the first flap（10）
Pass through gasket（9）It is in sealing contact.
7. compound pressure reducing valve according to claim 3, which is characterized in that first valve seat（8）With the first flap（10）
Respectively dismountable unit module.
8. compound pressure reducing valve according to claim 4, which is characterized in that second adjusting rod（17）It is externally provided with protective case
（16）.
9. compound pressure reducing valve according to claim 2, which is characterized in that when the pressure executive component is diaphragm, institute
State the second diaphragm in the decompressing unit of the second level（28）Second pressure regulating device, the second pressure regulating device packet is arranged in top
Include spring on second（29）, fix spring on second（29）Spring base（30）, and and spring base（30）The adjusting spiral shell of connection
Bar（31）, the adjusting screw rod（31）Pass through third nut（32）To valve body（5）Outer stretching；Second diaphragm（28）Lower section is set
The second flap headstock gear is set, the second flap headstock gear includes the second valve seat（33）, second valve seat（33）With
Two flaps（34）Contact, second flap（34）The second auxiliary spring is arranged in lower section（35）.
10. compound pressure reducing valve according to claim 9, which is characterized in that when the pressure executive component is diaphragm, institute
State the first diaphragm in first order decompressing unit（40）First pressure regulating device, the first pressure regulating device packet is arranged in lower section
Include second time spring（41）, with second time spring（41）The regulating valve stem of connection（42）, the regulating valve stem（42）Pass through
Valve stem nut（43）, elastic cylindrical pin（44）And adjusting ring（45）It is integrally placed at valve body（5）It is interior；First diaphragm（40）Top
First flap headstock gear is set, and the structure of the first flap headstock gear and the structure of the second flap headstock gear are complete
It is exactly the same.
11. compound pressure reducing valve according to claim 10, which is characterized in that second diaphragm（28）Lower surface be equipped with every
Pressing sleeve under film（38）, upper surface is equipped with diaphragm top board（39）, correspondingly, first diaphragm（40）Upper surface is equipped under diaphragm
Pressing sleeve（38）, lower surface is equipped with diaphragm top board（39）.
12. compound pressure reducing valve according to claim 11, which is characterized in that pressing sleeve under the diaphragm（38）It is pressed on diaphragm
Plate（39）It is no axial aperture structure setting.
13. compound pressure reducing valve according to claim 10, which is characterized in that first diaphragm（40）With the second diaphragm
（28）With the valve body（5）Between be equipped with dottle pin（37）.
14. compound pressure reducing valve according to claim 9, which is characterized in that second valve seat（33）With valve body（5）Between
Equipped with O-ring（36）.
15. compound pressure reducing valve according to claim 1, which is characterized in that the valve body（5）With the interface portion of external pipeline
It is in multilayer fin structure to divide.
16. compound pressure reducing valve according to claim 1, which is characterized in that be arranged with down outside the first order decompressing unit
Valve deck（1）, bonnet, is arranged with outside the second level decompressing unit（13）.
17. compound pressure reducing valve according to claim 16, which is characterized in that the bonnet,（13）Pass through studs
（19）With the second nut（20）With valve body（5）It is fixedly connected.
18. compound pressure reducing valve according to claim 17, which is characterized in that the studs（19）With the second nut
（20）Between be additionally provided with lock washer with double ears（21）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004999.1A CN108799582A (en) | 2018-08-30 | 2018-08-30 | Compound pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004999.1A CN108799582A (en) | 2018-08-30 | 2018-08-30 | Compound pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108799582A true CN108799582A (en) | 2018-11-13 |
Family
ID=64081292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811004999.1A Pending CN108799582A (en) | 2018-08-30 | 2018-08-30 | Compound pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108799582A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819285A (en) * | 2021-09-14 | 2021-12-21 | 上海猛轼流体机械有限公司 | Composite bipolar pressure reducing valve |
| WO2024119390A1 (en) * | 2022-12-07 | 2024-06-13 | Engineered Controls International, Llc | Two-stage pressure regulator for compressed gas |
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