CN208816763U - Compound pressure reducing valve - Google Patents
Compound pressure reducing valve Download PDFInfo
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- CN208816763U CN208816763U CN201821413858.0U CN201821413858U CN208816763U CN 208816763 U CN208816763 U CN 208816763U CN 201821413858 U CN201821413858 U CN 201821413858U CN 208816763 U CN208816763 U CN 208816763U
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Abstract
Compound pressure reducing valve provided by the utility model, including valve body, coaxial opposite two-stage decompression unit: first order decompressing unit and second level decompressing unit is equipped in the valve body, pressure executive component is provided 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 the utility model valve body, and valve is enable to realize the pressure-reduced and-regulated of outlet end in wider pressure range.
Description
Technical field
The utility model relates to valve technology field more particularly to a kind of compound pressure reducing valves.
Background technique
Pressure reducing valve is inlet pressure to be reduced to the outlet pressure of a certain needs, and by the energy of medium itself by adjusting
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 " are 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 decompression
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 to stablize outlet pressure in setting value by single valve at this time.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.
Summary of the invention
The shortcomings that for the above-mentioned prior art, the purpose of the utility model is to provide a kind of compound pressure reducing valve, overall structures
It is compact, 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, the technical solution of the utility model 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 order decompressing unit and second level decompressing unit are provided with pressure in the first order decompressing unit and second level decompressing unit
Power executive component, pressure executive component one end are arranged pressure-regulating device, and the other end is arranged flap headstock gear, and described the
Level-one 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 below first piston in member, and the first pressure regulating device includes the first lower spring, fixed
The lower spring cup of first lower spring, and the first adjusting rod connecting 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, is connected with valve rod 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 above second piston in member, and the second pressure regulating device includes the first upper spring, fixed
The upper spring seat of first upper spring, and the adjusting screw rod being 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 is in sealing contact by gasket with the first flap.
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 the second upper spring, fixed
The spring base of second upper spring, and the adjusting screw rod connecting with spring base, the adjusting screw rod pass through 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 below the first diaphragm in member, and the first pressure regulating device includes the second lower spring, with institute
The regulating valve stem of the second lower 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
Bonnet, is arranged with 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 utility model, valve body is interior to be subtracted equipped with coaxial opposite two-stage
Unit: first order decompressing unit and second level decompressing unit is pressed, in the first order decompressing unit and second level decompressing unit
It is provided with pressure executive component, pressure-regulating device is arranged in pressure executive component one end, and the other end is arranged flap and opens and closes dress
It sets, the first order decompressing unit is connected to second level decompressing unit by runner built in valve body.It is set in the utility model valve body
It sets two groups of decompressing units and optimizes combinations of pairs, valve is enable to realize subtracting for outlet end in wider pressure range
Press pressure stabilizing.
Make furtherly below with reference to technical effect of the attached drawing to the design of the utility model, specific structure and generation
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Detailed description of the invention
Fig. 1: the utility model embodiment Dual Piston type structure of relief pressure valve schematic diagram；
Fig. 2: the utility model embodiment valve seat divides into the structural schematic diagram of support spring；
Fig. 3: the schematic cross-section without feedback hole in the middle part of valve stem tip in the prior art；
Fig. 4: the schematic cross-section of setting feedback hole in the middle part of the utility model embodiment valve stem tip；
Fig. 5: the compound diaphragm type structure of relief pressure valve schematic diagram of the utility model embodiment；
Fig. 6: the interface section structural schematic diagram of the utility model embodiment valve body and external pipeline；
1, bottom flange；2, lower spring cup；3, the first adjusting rod；4, the first lower spring；5, valve body；6, first piston；7, valve
Bar；8, the first valve seat；9, gasket；10, the first flap；11, the first auxiliary spring；12, auxiliary spring fulcrum bearing；13, bonnet,；
14, the first upper spring；15, upper spring seat；16, protective case；17, the second adjusting rod；18, the first nut；19, studs；20,
Second nut；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, the second upper spring；30, spring base；31, adjusting screw rod；32, third nut；33, the second valve
Seat；34, the second flap；35, the second auxiliary spring；36, O-ring；37, dottle pin；38, pressing sleeve under diaphragm；39, diaphragm top board；40,
First diaphragm；41, the second lower spring；42, regulating valve stem；43, valve stem nut；44, elastic cylindrical pin；45, adjusting ring.
Specific embodiment
The technical issues of in order to keep the utility model solved, technical solution and beneficial effect are more clearly understood, below
In conjunction with accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific implementation described herein
Example is only used to explain the utility model, is not used to limit the utility model.
Compound pressure reducing valve provided by the utility model, including valve body 5, the valve body 5 is interior to be subtracted equipped with coaxial opposite two-stage
Unit: first order decompressing unit and second level decompressing unit is pressed, in the first order decompressing unit and second level decompressing unit
It is provided with pressure executive component, pressure-regulating device is arranged in pressure executive component one end, and the other end is arranged flap and opens and closes dress
It sets, the first order decompressing unit is connected to second level decompressing unit by runner built in valve body.It is set in the utility model valve body
It sets two groups of decompressing units and optimizes combinations of pairs, valve is enable to realize subtracting for outlet end in wider pressure range
Press pressure stabilizing.
Since valve inner uses recombiner unit structure, valve body cavity needs to process built-in deep hole the utility model embodiment
Runner, drilling cutters are easily broken off when conventional machining, and position precision cannot guarantee that, thus the utility model use it is special
Frock clamp guarantees the working depth and position precision of runner.
Preferably, in the compound pressure reducing valve of the utility model, the pressure executive component is piston or diaphragm.
As shown in Figure 1, when pressure executive component is piston, Dual Piston type decompression provided by the embodiment of the utility model
First pressure regulating device, the first pressure regulating device are arranged in the first order decompressing unit for valve below first piston 6
Including the first lower spring 4, the lower spring cup 2 of the first lower spring 4, and the first adjusting rod 3 connecting with lower spring cup 2 are fixed,
First adjusting rod 3 is integrally placed in valve body 5；First flap headstock gear is set above the first piston 6, described first
Flap headstock gear includes the first valve seat 8, and first valve seat 8 contacts with the first flap 10, connects at the top of first flap 10
It is connected to valve rod 7, send and the first auxiliary spring 11 is set above first valve seat 8, first auxiliary spring 11 is placed in auxiliary spring fulcrum bearing
On 12.
Further, it in above-mentioned Dual Piston type pressure reducing valve, is set above second piston 26 in the second level decompressing unit
Second pressure regulating device is set, the second pressure regulating device includes the first upper spring 14, fixes the upper of the first upper spring 14
Spring base 15, and the second adjusting rod 17 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；Second flap headstock gear, the structure of the second flap headstock gear are set below the second piston 26
It is identical with the structure of the first flap headstock gear.
Preferably, the pressure executive component of every group of unit of the utility model embodiment uses stainless steel pistons, because piston has
Have high-intensitive and high rigidity, can bear it is higher use pressure, expand the application range of the utility model valve.Add in machinery
Working hour, since the utility model embodiment uses piston structure, therefore the matching surface of valve body and piston, valve rod and valve seat have it is higher
Required precision, the utility model using specialized nc machine tool carry out Precision Machining, both ensure that the higher finish of mating surface,
In turn ensure dimensional accuracy and concentricity requirement.
During the utility model is implemented, main spring (spring 4 under such as first) is set below first piston 6, by main spring
Compression elasticity and the feedback pressure of plunger shaft compare, the aperture of flap is controlled, to adjust the pressure of outlet end.It is preferred that
Ground, since spring is in for a long time under alternate stress effect, the utility model embodiment pressure reducing valve requires it not only and has higher
Fatigue limit, yield point, enough impact flexibility, excellent harden ability, low superheated susceptivity and be not easy the performances such as decarburization,
Must also there are good anticorrosion and performance resistant to high temperature.Because pressure-relief valve spring is stainless using 65Mn and 304/316 in the prior art
Steel material can only meet partial function, therefore the utility model embodiment spring uses 17-7PH PH stainless steel material,
The material is a kind of precipitation-hardening stainless steel, has the characteristics that antifatigue, high temperature resistant, etch-proof three big.
As shown in Fig. 2, being equipped with support spring (such as the first auxiliary spring above the first valve seat 8 in the utility model implementation
11), have the function of response pressure variation and auxiliary seal, while having mitigated the impact of flow, so that the unlatching of flap is more
Steadily.
In implementation, first order decompressing unit and second level decompressing unit can be corresponded in the utility model embodiment valve body 5
High voltage adjusting area and low pressure regulatory region are distributed according to the pressure that operating condition carries out different proportion.The utility model embodiment high pressure tune
Section area's 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, root
It is distributed according to pressure, the utility model embodiment height pressure area can select the main spring of different pressure levels respectively, pass through pressure
It is right, realize that the pressure between high-low pressure is adjusted, and then determine the function of pressure reducing valve pressure-reduced and-regulated.
Further, in above-mentioned Dual Piston type pressure reducing valve, 7 top middle portion of valve rod is equipped with feedback hole 27.This is practical
New embodiment is axially punched in the middle part of valve rod, using discharging type balanced design, is effectively reduced seat load, is protected valve
Sealing surface 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 feedback hole 27, pressure F=(P1- P2) S1.
As shown in figure 4, if 7 top middle portion of valve rod be 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 working principle of the utility model embodiment Dual Piston type pressure reducing valve is as follows: before valve debugging, spring is in
Free state, the first flap 10 close outlet, high-pressure inlet fluid is closed in down at this time under the action of the first auxiliary spring 11
In chamber.The first adjusting rod 3 is rotated, drives lower spring cup 2 to rise the lower spring 4 of compression first, and then first piston 6 is pushed to act,
First 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, real
Existing level-one decompression.The high-pressure fluid in plunger shaft is by the feedback hole 27 in the middle part of valve rod 7 simultaneously, into the bottom of the first flap 10
Portion balances 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
Under the action of pole 17 and the first upper spring 14, after two-stage decompression, outlet is flow to by valve channel.The utility model embodiment
The lower spring 4 of the first upper spring 14, first and the first auxiliary spring 11 by matching different-stiffness, control the pressure of decompressing units at different levels
The equilibrium response of power proportion and off-load valve rod, 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 the first flap 10 pass through gasket 9
It is in sealing contact.Since the execution unit of the utility model embodiment is elastic soft sealing structure, applied in implementation more
O-ring seal and rubber gasket, the O-ring 22 being arranged between auxiliary spring fulcrum bearing 12 and valve body as shown in figure 1, auxiliary spring
O-ring 24 and first is arranged in the O-ring 23 being arranged between fulcrum bearing 12 and the first valve seat 8 between first valve seat 8 and valve body
O-ring 22 being arranged between piston 6 and valve body etc..The wherein rubber pad applied to the piston seal of dynamic sealing and primary seal
It is particularly important, these rubber parts other than guaranteeing the performance indicators such as necessary tensile strength, elongation, hardness, anti-aging, by
In valve for nuclear power station, its medium is not only corrosive, but also bears the irradiation centainly measured, therefore, for the utility model work
Condition, the utility model embodiment, which is selected, corrosion-resistant but also radiation resistance and can reach the specific rubber-tri- of expected service life
First the third glue of second EPDM, and pass through irradiation test, folding resistant test, static life test, Hot Life test, it was demonstrated that it is able to satisfy core
The requirement in power station.
Further, in above-mentioned Dual Piston type pressure reducing valve, first valve seat 8 and the first flap 10 are respectively detachable
Unit module.In implementation, the utility model embodiment valve seat and flap design can be exchanged at unit module with integral demounting
Property it is stronger, convenient for product install and safeguard.And assembled under valve seat and flap unit module line, the work of installation has also been saved simultaneously
It measures, 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
Precision.
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 the utility model valve working condition pressure is higher ranked, it is contemplated that nuclear leve
The high security of valve, the utility model embodiment select forging valve body and piston for this valve.Forging has good power
Performance is learned, for metal stock tissue after forging method thermal processing distortion, institutional framework becomes even closer, original in steel ingot
Compacting and soldering, substantially increase the plasticity and mechanical property of metal after the defects of segregation, loose, stomata, slag inclusion is forged.
As shown in figure 5, when the pressure executive component is diaphragm, compound diaphragm type provided by the embodiment of the utility model
In pressure reducing valve, second pressure regulating device, the second pressure are set above the second diaphragm 28 in the second level decompressing unit
Regulating device includes the second upper spring 29, fixes the spring base 30 of the second upper spring 29, and the adjusting connecting with spring base 30
Screw rod 31, the adjusting screw rod 31 are stretched out by third nut 32 to outside valve body 5；Second valve is set below second diaphragm 28
Valve headstock gear, the second flap headstock gear include the second valve seat 33, and second valve seat 33 is contacted with the second flap 34,
Second auxiliary spring 35 is set below second flap 34.
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 set below the first diaphragm 40 in decompressing unit, and the first pressure regulating device includes the second lower bullet
Spring 41, the regulating valve stem 42 connecting with the described second lower 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 flap headstock gear is set above first diaphragm 40, described first
The structure of flap headstock gear is identical with the structure of the second flap headstock gear.
The utility model embodiment is using diaphragm as pressure executive component, because pressure is lower, diaphragm is suitable for pressing
The variation of power is reacted sensitiveer.
The utility model embodiment is segmented two-stage decompression, gradually reduces pressure.Similar to piston reducing valve, this is practical new
Different decompression regulative modes is also respectively adopted in the two-stage decompression unit of type embodiment diaphragm type pressure reducing valve, and higher level is rising stem type,
Junior is blind rod type, saves space, facilitates adjusting.
The utility model embodiment, to support flap, provides auxiliary in 34 the second auxiliary spring of following settings 35 of the second flap
Sealing, while main spring (such as the second upper spring 29) being cooperated to mitigate the impact of flow, the unlatching of flap is more steady.It is preferred that
Ground, the utility model 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.This is practical new
Type embodiment diaphragm uses the pressure plare without axial aperture structure up and down, compares conventional nut compression type, has prevented axial leakage, significantly
Improve safety.Meanwhile the weight of diaphragm assembly is alleviated, adapt to low pressure operating condition.
Further, in above-mentioned compound diaphragm type pressure reducing valve, first diaphragm 40 and the 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 working principle of the compound diaphragm type pressure reducing valve of the utility model embodiment is as follows: before valve debugging, spring is in
Free state, the second flap 34 close outlet, high-pressure inlet fluid is closed in down at this time under the action of the second auxiliary spring 35
In chamber.Rotating regulation valve bar 42, the lower spring 41 of compression second, and then the movement of the first diaphragm 40 is pushed, open the second flap 34, stream
Body enters diaphragm cavity, flows into epicoele by inner flow passage, realizes level-one decompression.Similarly, into the fluid of epicoele, adjusting spiral shell is being stated
Under the action of bar 31 and the second upper 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 utility model is as follows:
| Import (KPA) | It exports (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 |
From the above, it can be seen that the utility model embodiment valve can be realized in wider input end pressure range
The pressure-reduced and-regulated of outlet pressures, fully meets code requirement.
As shown in fig. 6, the interface section of the utility model embodiment valve body 5 and external pipeline is designed to the finned knot of multilayer
Structure, to reinforce radiating, 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
Bonnet, 13 is arranged with 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, the utility model embodiment valve body valve deck uses stainless steel forgings valve body valve deck, and institutional framework is close,
Metal Mechanic Property is excellent, is able to bear higher pressure, fully meets the quality safety demand of nuclear grade valve.
To sum up, the compound pressure reducing valve of the utility model, two groups of decompressing units of the interior setting of valve body optimize combinations of pairs, make valve
Door can realize the pressure-reduced and-regulated of outlet end in wider pressure range.Two groups of decompressing units of the utility model are divided into height
Regulatory region and low pressure regulatory region are pressed, the high voltage adjusting area is designed to that dark bar is adjusted, and saves installation space, and low pressure regulatory region is bright
Bar is adjusted, convenient for fine-tuning.It in implementation, is distributed according to pressure, high-low pressure area selects the spring of different pressure levels respectively, leads to
Excess pressure is right, realizes that the pressure between high-low pressure is adjusted.In addition, main bullet is arranged in the utility model above pressure executive component
Spring compares by the compression elasticity and intracavitary feedback pressure of main spring, controls the aperture of flap, to adjust outlet end
Pressure.It is equipped with support spring below valve seat, has the function of response pressure variation and auxiliary seal, while having mitigated flow
Impact so that the unlatching of flap is more steady.The utility model flap uses discharging type balanced design, is effectively reduced valve seat
Load protects valve sealing face, extends the service life of valve seat.And valve seat and flap design be at unit module, it can be whole
Body disassembly, interchangeability is stronger, installs and safeguards convenient for product.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (18)
1. compound pressure reducing valve, including valve body (5), which is characterized in that be equipped with coaxial opposite two-stage decompression list in the valve body (5)
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 is pressure executive component, pressure-regulating device is arranged in pressure executive component one end, and flap headstock gear, institute is arranged in the other end
It states first order decompressing unit and is connected to second level decompressing unit by runner built in valve body.
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
It states and first pressure regulating device, the first pressure regulating device packet is set below first piston (6) in first order decompressing unit
First lower spring (4) are included, the lower spring cup (2) of first lower spring (4) is fixed, and first connect with lower spring cup (2) is adjusted
Pole (3), first adjusting rod (3) are integrally placed in valve body (5)；The first flap of setting opens above the first piston (6)
Device is closed, the first flap headstock gear includes the first valve seat (8), and first valve seat (8) contacts with the first flap (10),
Valve rod (7) are connected at the top of first flap (10), send and the first auxiliary spring (11) is set above the first valve seat (8), it is described
First auxiliary spring (11) is placed on auxiliary spring fulcrum bearing (12).
4. compound pressure reducing valve according to claim 3, which is characterized in that when the pressure executive component is piston, institute
It states and second pressure regulating device, the second pressure regulating device packet is set above second piston (26) in the decompressing unit of the second level
The first upper spring (14) are included, the upper spring seat (15) of the first upper spring (14) is fixed, and connect with upper spring seat (15)
Two adjusting rods (17), second adjusting rod (17) are stretched out by the first nut (18) to valve body (5) outside；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 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) and the first flap (10)
It is in sealing contact by gasket (9).
7. compound pressure reducing valve according to claim 3, which is characterized in that first valve seat (8) and 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) 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
It states and second pressure regulating device, the second pressure regulating device packet is set above the second diaphragm (28) in the decompressing unit of the second level
The second upper spring (29) are included, the spring base (30) of the second upper spring (29), and the adjusting spiral shell connecting with spring base (30) are fixed
Bar (31), the adjusting screw rod (31) are stretched out by third nut (32) to valve body (5) outside；It is set below second diaphragm (28)
Set the second flap headstock gear, the second flap headstock gear includes the second valve seat (33), second valve seat (33) and the
The second auxiliary spring (35) are arranged in two flaps (34) contact, the second flap (34) lower section.
10. compound pressure reducing valve according to claim 9, which is characterized in that when the pressure executive component is diaphragm, institute
It states and first pressure regulating device, the first pressure regulating device packet is set below the first diaphragm (40) in first order decompressing unit
Second lower spring (41) are included, the regulating valve stem (42) connecting with described second lower spring (41), the regulating valve stem (42) passes through
Valve stem nut (43), elastic cylindrical pin (44) and adjusting ring (45) are integrally placed in valve body (5)；Above first diaphragm (40)
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 the second diaphragm (28) lower surface be equipped with every
Pressing sleeve (38) under film, upper surface are equipped with diaphragm top board (39), and correspondingly, the first diaphragm (40) upper surface is equipped under diaphragm
Pressing sleeve (38), lower surface are equipped with diaphragm top board (39).
12. compound pressure reducing valve according to claim 11, which is characterized in that pressed on pressing sleeve (38) and diaphragm under the diaphragm
Plate (39) is no axial aperture structure setting.
13. compound pressure reducing valve according to claim 10, which is characterized in that first diaphragm (40) and the second diaphragm
(28) it is equipped between the valve body (5) dottle pin (37).
14. compound pressure reducing valve according to claim 9, which is characterized in that between second valve seat (33) and valve body (5)
Equipped with O-ring (36).
15. compound pressure reducing valve according to claim 1, which is characterized in that the interface portion of valve body (5) and external pipeline
Dividing is in multilayer fin structure.
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), the second level decompressing unit are arranged with bonnet, (13) outside.
17. compound pressure reducing valve according to claim 16, which is characterized in that the bonnet, (13) passes through studs
(19) it is fixedly connected with the second nut (20) with valve body (5).
18. compound pressure reducing valve according to claim 17, which is characterized in that the studs (19) and the second nut
(20) lock washer with double ears (21) are additionally provided between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821413858.0U CN208816763U (en) | 2018-08-30 | 2018-08-30 | Compound pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821413858.0U CN208816763U (en) | 2018-08-30 | 2018-08-30 | Compound pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208816763U true CN208816763U (en) | 2019-05-03 |
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ID=66275201
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| CN (1) | CN208816763U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799582A (en) * | 2018-08-30 | 2018-11-13 | 上海艾维科阀门股份有限公司 | Compound pressure reducing valve |
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2018
- 2018-08-30 CN CN201821413858.0U patent/CN208816763U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799582A (en) * | 2018-08-30 | 2018-11-13 | 上海艾维科阀门股份有限公司 | Compound pressure reducing valve |
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