CN108953714A - A kind of rely on oneself controls the structure of the normally opened decompression of low pressure - Google Patents
A kind of rely on oneself controls the structure of the normally opened decompression of low pressure Download PDFInfo
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- CN108953714A CN108953714A CN201810880070.9A CN201810880070A CN108953714A CN 108953714 A CN108953714 A CN 108953714A CN 201810880070 A CN201810880070 A CN 201810880070A CN 108953714 A CN108953714 A CN 108953714A
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- low pressure
- pressure
- decompression
- valve
- low
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- 230000006837 decompression Effects 0.000 title claims abstract description 88
- 230000008676 import Effects 0.000 claims description 26
- 238000001914 filtration Methods 0.000 claims description 17
- 125000006850 spacer group Chemical group 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 abstract description 29
- 238000011144 upstream manufacturing Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 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
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The present invention provides a kind of rely on oneself to control the structure of the normally opened decompression of low pressure, belongs to the technical field of control set for adjusting.It is a kind of to rely on oneself that control the structure of the normally opened decompression of low pressure include filter, pressure reducing valve and low pressure normally open valve；The present invention by setting filter, both prevented the blocking to pressure reducing valve and low pressure normally open valve, at the same also can impurity screening, provide cleannes higher fluid；Also by the way that pressure reducing valve and low pressure normally open valve to be arranged in parallel, so that pressure reducing valve can be opened when upstream pressure is larger, and close low pressure normally open valve, realize the decompression and supply of fluid, when upstream pressure is smaller and in the case where failing to open pressure reducing valve, low pressure normally open valve is opened, the supply of fluid is equally realized, adaptability is higher, it is normally carried out very much to ensure that in people's production and life, avoids and people's production and life is impacted, protection is higher.
Description
Technical field
The present invention relates to the technical fields of control set for adjusting, are specifically related to a kind of rely on oneself and control the normally opened decompression of low pressure
Structure.
Background technique
In people's production and life, such as domestic water system, fire-fighting system, production water supply plyability water supply system
In, usually use pressure reducing valve to cause certain pressure loss by changing orifice size as the decompressor of fluid, make
The flow velocity and kinetic energy for obtaining fluid reduce, and achieve the purpose that decompression, and cooperate control and the adjusting of regulating system, make downstream pressure
Fluctuation balance each other with the intracorporal spring force of valve, so that downstream pressure is remained constant in certain error range.
Currently, since the outlet pressure of existing pressure reducing valve pipe laying is generally higher than 0.1MPa, but Pressure Reducing Valve for Fire System
Selection principle be that minimum pressure is 0.2MPa bigger than dynamic pressure after valve before valve, cause when ductwork pressure is lower, it is primary to press
In the case where power and secondary pressure difference very little, pressure reducing valve is inadequate due to upstream pressure, it is difficult to guarantee water outlet, seriously affect people
Life and production, cause great inconvenience.
Summary of the invention
For the above-mentioned problems in the prior art, now it is intended to provide a kind of rely on oneself and controls the knot of the normally opened decompression of low pressure
Structure is filtered with being arranged before a filter carries out the valve of fluid on pipe laying, and connects pressure reducing valve and low pressure after filter
Normally open valve, and by the two parallel connection, in the biggish situation of upstream pressure, pressure reducing valve is opened, and low pressure normally open valve is closed, by pressure reducing valve
Depressurize and realize supply, in the lesser situation of upstream pressure, pressure reducing valve is closed, and low pressure normally open valve is opened, by low pressure normally open valve
It realizes supply, to ensure that the upstream pressure regardless of pipe laying, can guarantee water supply, to ensure that the life of people
It produces and life is normally carried out.
Specific technical solution is as follows:
A kind of rely on oneself controls the structure of the normally opened decompression of low pressure, has the feature that, comprising: filter and pressure adjusting structure,
Filter is set on pipe laying, and in the import for being connected with pressure adjusting structure in the outlet of filter, the outlet of pressure adjusting structure
It is connected with service, wherein pressure adjusting structure includes pressure reducing valve and low pressure normally open valve, and pressure reducing valve and low pressure normally open valve are set side by side
It sets.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein filter include filtering valve body, strainer and
Capping, filtering valve body are provided with linearly arrangement and disconnected filtered inlet and filtering outlet, meanwhile, in filtered inlet and mistake
It filtering out and is provided between mouth towards the inclined strainer mouth of filtering outlet, filtered inlet is connected to by strainer mouth with filtering outlet, and in
It is provided with strainer in strainer mouth, and in being bolted with capping in the opening of strainer mouth.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein pressure reducing valve includes:
Reducing valve body offers decompression import, relief outlet, upper connectivity port and lower connectivity port on reducing valve body, subtracts
It is pressed into mouth and relief outlet is oppositely arranged in the horizontal direction, upper connectivity port and lower connectivity port are set relatively in the vertical direction
It sets, and upper connectivity port and lower connectivity port are all set between decompression import and relief outlet, meanwhile, depressurize import and decompression
The top of outlet is connected to by upper connectivity port, and decompression import is connected to the lower part of relief outlet by lower connectivity port；
Valve deck is depressurized, decompression valve deck is bolted in the opening of connectivity port；
Bottom plug, bottom plug are bolted in the opening of lower connectivity port；
Decompression piston, decompression piston are vertically arranged, and the upper end of decompression piston is protruded into connectivity port, and lower company is protruded into lower end
It connects in port, and is arranged with a flap in the lower end of decompression piston；
Spring, spring include upper spring and lower spring, and one end of upper spring is resisted against the upper end of decompression piston, and the other end supports
It is against pressure reducing valve to cover, one end of lower spring is resisted against on flap, and the other end is resisted against on bottom plug.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein depressurizes the centre of valve deck and along upper connecting pin
The setting direction of mouth offers threaded through-hole, and the interior and side away from upper connectivity port of through-hole is bolted with adjustment seat, upper bullet
One end that spring is resisted against decompression valve deck is protruded into through-hole to be contacted with adjustment seat, meanwhile, in the opening of through-hole and positioned at adjustment seat
Side away from upper spring is provided with headkerchief.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein is also provided with pressure tap on reducing valve body, surveys
Pressure hole is connected between upper connectivity port and relief outlet and with the two, and stifled in being bolted on the outside aperture of pressure tap
Head.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein and decompression piston is arranged in three sections of variable cross-section,
It successively include the first seal section, the second seal section and third seal section, the sectional area of the first seal section is greater than the second seal section
With the sectional area of third seal section, and the first seal section is set in connectivity port, and third seal section is set to lower connecting pin
In mouthful, and flap is sheathed on third seal section, meanwhile, it is provided with boss on the wall body in lower connectivity port, in decompression piston
When moving up, boss and flap are laminated.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein low pressure normally open valve includes:
Low pressure valve body, low pressure valve body are provided with input end and connecting pin, and input end offers low pressure inlet, connecting pin setting
Have hollow, low pressure inlet is arranged and is connected to along a straight line with hollow, and in being bolted with a low pressure valve deck, low pressure valve deck on connecting pin
Low tension outlet is offered away from the side of connecting pin, and low tension outlet is connected to hollow；
Low-pressure piston, low-pressure piston are set in hollow, offer deflector hole, water conservancy diversion in low-pressure piston along its length
The one end in hole is connected to low pressure inlet；
Valve seat, valve seat are in hollow setting, and one end of valve seat is sheathed on low-pressure piston on one end of low pressure valve deck, valve seat
The other end be bolted with valve seat lid, on the wall body of valve seat and be located at the central region of valve seat and offer several recirculation holes；
Low pressure spring, low pressure spring pocket are set on low-pressure piston, and to be resisted against low-pressure piston close for one end of low pressure spring
On one end of low pressure inlet, the other end is resisted against on valve seat.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein low pressure valve body it is hollow in be additionally provided with ring
The spacer ring of shape, spacer ring is located at valve seat and offers stomata on the side of low-pressure piston, spacer ring, and offers on the outer wall of spacer ring
Annular gas tank is simultaneously connected to stomata, while in offering gas vent, and gas vent and ring on the wall body of the connecting pin of low pressure valve body
The connection of shape air drain.
A kind of above-mentioned rely on oneself controls the structure of the normally opened decompression of low pressure, wherein and low-pressure piston is arranged in two sections of variable cross-section,
Direction along input end to connecting pin successively includes contact-segment and diversion section, and the sectional area of contact-segment is greater than the section of diversion section
Product, deflector hole run through contact-segment and diversion section, and the outer wall of contact-segment fits on hollow inner wall, and low pressure spring pocket is set to water conservancy diversion
Duan Shang, and low pressure spring is resisted against in contact-segment close to one end of low pressure inlet.
The good effect of above-mentioned technical proposal is:
Above-mentioned relying on oneself controls the structure of the normally opened decompression of low pressure, by the way that filter is arranged, realizes the filtering to fluid, both
It can prevent from blocking subsequent pressure adjusting structure, moreover it is possible to guarantee that the cleannes of supply, protection are higher；And it is pressure reducing valve and low pressure is normal
Valve opening composes in parallel pressure adjusting structure, ensure that opening pressure reducing valve, closing low pressure are normal in the biggish situation of upstream pressure of fluid
Valve opening realizes to the decompression operation of fluid and realizes supply, smaller in the upstream pressure of fluid and can not open the feelings of pressure reducing valve
Make low pressure normally open valve maintain open state under condition, equally realizes the supply of fluid, the upstream pressure for both having adapted to fluid is big
The case where, the small situation of the upstream pressure of fluid is also adapted to, adaptability is higher, has been always ensured that in people's production and life
Supply it is normal.
Detailed description of the invention
Fig. 1 is that a kind of rely on oneself of the invention controls the structure chart of the embodiment of structure of the normally opened decompression of low pressure；
Fig. 2 is a preferred embodiment of the present invention the structure chart of filter；
Fig. 3 is a preferred embodiment of the present invention the structure chart of pressure reducing valve；
Fig. 4 is a preferred embodiment of the present invention the structure chart of low pressure normally open valve.
In attached drawing: 1, filter；11, valve body is filtered；12, strainer；13, it covers；111, filtered inlet；112, it filters out
Mouthful；113, strainer mouth；2, pressure reducing valve；21, reducing valve body；22, valve deck is depressurized；23, bottom plug；24, decompression piston；25, upper spring；
26, lower spring；27, flap；211, import is depressurized；212, relief outlet；213, upper connectivity port；214, lower connectivity port；
215, pressure tap；216, plug；217, boss；221, through-hole；222, adjustment seat；223, headkerchief；241, the first seal section；242,
Second seal section；243, third seal section；3, low pressure normally open valve；31, low pressure valve body；32, low pressure valve deck；33, low-pressure piston；
34, valve seat；35, low pressure spring；36, spacer ring；311, input end；312, connecting pin；3111, low pressure inlet；3121, hollow；
3122, gas vent；321, low tension outlet；331, contact-segment；332, diversion section；333, deflector hole；341, valve seat lid；342, it circulates
Hole；361, stomata；362, annular gas tank.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
It applies example combination attached drawing 1 and technical solution provided by the invention is specifically addressed to attached drawing 4, but the following contents is not as of the invention
It limits.
Fig. 1 is that a kind of rely on oneself of the invention controls the structure chart of the embodiment of structure of the normally opened decompression of low pressure.Such as Fig. 1 institute
Show, it is provided in this embodiment to rely on oneself that control the structure of the normally opened decompression of low pressure include: filter 1 and pressure adjusting structure, it filter 1 and adjusts
Laminated structure is connected in series, and filter 1 is set on pipe laying, and the import of pressure adjusting structure is connected in the outlet of filter 1, adjusts
The outlet of laminated structure is connected with service, realizes supply, and is able to achieve the filtering to fluid, prevents occlusion adjustments structure,
And the higher fluid of supplying clean degree.Wherein, pressure adjusting structure includes pressure reducing valve 2 and low pressure normally open valve 3, and pressure reducing valve 2 and low pressure
Normally open valve 3 is set side by side, and both pressure reducing valve 2 and low pressure normally open valve 3 are not opened simultaneously, thus meet Fluid pressure before valve it is excessive or
Too small the two situation realizes supply, avoids and impact to people's production and life.
Fig. 2 is a preferred embodiment of the present invention the structure chart of filter 1.As depicted in figs. 1 and 2, filter 1 included
Trap valve body 11, strainer 12 and capping 13 filter and offer disconnected filtered inlet 111 and filtering outlet 112 on valve body 11,
Filtered inlet 111 and filtering outlet 112 are positioned opposite along a straight line, meanwhile, it filters on valve body 11 and is located at 111 He of filtered inlet
It is provided between filtering outlet 112 towards the inclined strainer mouth 113 of filtering outlet 112, strainer mouth 113 is by 111 He of filtered inlet
Filtering outlet 112 is connected to, and in being provided with strainer 12 in strainer mouth 113, and in being bolted with capping in the opening of strainer mouth 113
13, facilitate the replacement to strainer 12 and the cleaning of impurity.
Fig. 3 is a preferred embodiment of the present invention the structure chart of pressure reducing valve.As shown in figures 1 and 3, pressure reducing valve 2 includes subtracting
Pressure valve body 21, decompression valve deck 22, bottom plug 23, decompression piston 24, spring and flap 27, spring include upper spring 25 and lower bullet again
Spring 26, wherein decompression import 211, relief outlet 212, upper connectivity port 213 and lower connectivity port are offered on reducing valve body 21
214, it depressurizes import 211 and relief outlet 212 is oppositely arranged in the horizontal direction, upper connectivity port 213 and lower connectivity port 214
It is oppositely arranged in the vertical direction, and upper connectivity port 213 and lower connectivity port 214 are all set in decompression import 211 and decompression
Between outlet 212, so that upper connectivity port 213, lower connectivity port 214, decompression import 211 and the intersection of relief outlet 212 are set
It sets, meanwhile, decompression import 211 is connected to the top of relief outlet 212 by upper connectivity port 213, and import 211 and decompression are depressurized
The lower part of outlet 212 is connected to by lower connectivity port 214, to realize when pressure reducing valve 2 is opened, fluid can be from decompression import
211 flow to relief outlet 212.Also, in being bolted with decompression valve deck 22 in the opening of upper connectivity port 213, in lower connectivity port
It is bolted with bottom plug 23 in 214 opening, realizes the closing of the upper connectivity port 213 and lower connectivity port 214 of reducing valve body 21.
Decompression piston 24 is vertically arranged in reducing valve body 21, and the upper end of decompression piston 24 is protruded into connectivity port 213, and lower end is protruded into
In lower connectivity port 214, and it is arranged with a flap 27 in the lower end of decompression piston 24, one end of upper spring 25 is resisted against decompression and lives
The upper end of plug 24, the other end are resisted against on decompression valve deck 22, and one end of lower spring 26 is resisted against on flap 27, and the other end is resisted against
On bottom plug 23.
Specifically, three section settings of the decompression piston 24 in variable cross-section, successively include the first seal section 241, the second seal section
242 and third seal section 243, the sectional area of the first seal section 241 is greater than the second seal section 242 and third seal section 243
Sectional area, and the first seal section 241 is set in connectivity port 213, third seal section 243 is set to lower connectivity port 214
It is interior, and flap 27 is sheathed on third seal section 243, meanwhile, boss 217 is provided on the wall body in lower connectivity port 214.?
When pressure reducing valve 2 is closed, decompression piston 24 is moved up, and boss 217 and flap 27 are laminated, the first seal section 241 and relief outlet
212 connections, the second seal section 242 and third seal section 243 are connected to decompression import 211；When pressure reducing valve 2 is opened, decompression
Piston 24 moves down, and boss 217 and flap 27 separate, and the first seal section 241 is interrupted with being connected to for relief outlet 212, and second is close
Envelope section 242 is connected to decompression import 211, and third seal section 243 is connected to relief outlet 212, to realize decompression import 211
With being connected to for relief outlet 212, the supply of fluid is realized.
More specifically, it is provided between the first seal section 241 and the wall body of upper connectivity port 213 of decompression piston 24 close
Seal is again provided with sealing ring, is arranged on third seal section 243 between the second seal section 242 and the wall body of reducing valve body 21
There is gasket, and gasket is embedded in flap 27, and gasket is located at flap 27 close to the side of boss 217, so that subtracting
When pressure valve 2 is closed, it is sealed between flap 27 and boss 217 by gasket, to improve the sealing of entire pressure reducing valve 2
Performance prevents the leakage of fluid.
More specifically, the centre of decompression valve deck 22 and the setting direction along upper connectivity port 213 offer threaded
Through-hole 221, the interior and side away from upper connectivity port 213 of through-hole 221 are bolted with adjustment seat 222, and upper spring 25 is resisted against decompression
One end of valve deck 22 is protruded into through-hole 221 and is contacted with adjustment seat 222, meanwhile, in the opening of through-hole 221 and positioned at adjustment seat
222 are provided with headkerchief 223 away from the side of upper spring 25, have both increased the adjusting space of upper spring 25, meanwhile, convenient for passing through rotation
Turn the realization of adjustment seat 222 to improve the adjusting of the pre-pressing force of upper spring 25 to meet the pressure demand of different fluids
Adaptability.
More specifically, pressure tap 215 is also provided on reducing valve body 21, pressure tap 215 is located at upper 213 He of connectivity port
It is connected between relief outlet 212 and with the two, and in being bolted with plug 216 on the outside aperture of pressure tap 215, convenient for inspection in real time
The pressure in pressure reducing valve 2 is surveyed, is operated more convenient.
Fig. 4 is a preferred embodiment of the present invention the structure chart of low pressure normally open valve.As shown in Figure 1 and Figure 4, low pressure normally open valve
3 include low pressure valve body 31, low pressure valve deck 32, low-pressure piston 33, valve seat 34, valve seat lid 341 and low pressure spring 35.Wherein, low
Pressure valve body 31 is provided with input end 311 and connecting pin 312, and input end 311 offers low pressure inlet 3111, and connecting pin 312 is arranged
Have hollow 3121, low pressure inlet 3111 is arranged and is connected to along a straight line with hollow 3121, and low in being bolted with one on connecting pin 312
Pressure valve lid 32, low pressure valve deck 32 offer low tension outlet 321 away from the side of connecting pin 312, and low tension outlet 321 and hollow
3121 connections, enable low pressure inlet 3111, hollow 3121 and low tension outlet 321 to constitute a channel.Also, in low pressure valve body
It is provided with low-pressure piston 33 in hollow the 3121 of 31, offers deflector hole 333, deflector hole along its length in low-pressure piston 33
333 one end is connected to low pressure inlet 3111, meanwhile, valve seat is arranged on one end of low pressure valve deck 32 in low-pressure piston 33
34, valve seat 34 is in hollow setting, be sheathed on low-pressure piston 33 be valve seat 34 wherein one end, the other end of valve seat 34 is spirally connected
There is a valve seat lid 341, on the wall body of valve seat 34 and is located at the central region of valve seat 34 and offers several recirculation holes 342, realize
When low-pressure piston 33 and valve seat 34 cooperate, one end of valve seat 34 is connected to deflector hole 333, and the other end is shut by valve seat lid 341, and
In the movement of low-pressure piston 33 in the hollow interior movement of valve seat 34,342 intermittent of recirculation hole on valve seat 34 by low-pressure piston
33 block or deflector hole 333 is connected to recirculation hole 342, also, low pressure spring 35 are also arranged on low-pressure piston 33, and low pressure bullet
One end of spring 35 is resisted against low-pressure piston 33 on one end of low pressure inlet 3111, and the other end is resisted against on valve seat 34, realizes
The post exercise in valve seat 34 of low-pressure piston 33 resets, so that fluid is successively from low pressure inlet when low pressure normally open valve 3 is opened
3111, deflector hole 333, the outflow of 342 low tension outlet 321 of recirculation hole, ensure that and still ensure that supply under low voltage situations.
More specifically, the spacer ring 36 of annular is additionally provided in hollow the 3121 of low pressure valve body 31, spacer ring 36 is located at valve
Seat 34 offers stomata 361 on the side of low-pressure piston 33, spacer ring 36, and offers annular gas tank on the outer wall of spacer ring 36
It 362 and is connected to, while in offering gas vent 3122 on the wall body of the connecting pin of low pressure valve body 31 312, and is vented with stomata 361
Hole 3122 is connected to annular gas tank 362, so that the air in hollow 3121 can be discharged in time when low-pressure piston 33 moves, from
And it is convenient for the movement of low-pressure piston 33, it prevents that the movement of low-pressure piston 33 is caused to need excessive pressure or the motionless problem of pressure.
More specifically, low-pressure piston 33 is arranged in two sections of variable cross-section, along input end 311 to the direction of connecting pin 312
It successively include contact-segment 331 and diversion section 332, the sectional area of contact-segment 331 is greater than the sectional area of diversion section 332, deflector hole 333
Through contact-segment 331 and diversion section 332, the outer wall of contact-segment 331 is fitted on hollow 3121 inner wall, and low pressure spring 35 is arranged
In on diversion section 332, and low pressure spring 35 is resisted against in contact-segment 331 close to one end of low pressure inlet 3111, can be convenient for real
Now sealing can also enable low-pressure piston 33 preferably to cooperate with valve seat 34 simultaneously, stretching motion be realized, to realize that low pressure is normal
The opening and closing of valve opening 3, while also being provided convenience for the arrangement of low pressure spring 35.
More specifically, it is provided with sealing ring on the wall body of the contact-segment 331 of low-pressure piston 33, realizes low-pressure piston
33 and low pressure valve body 31 hollow 3121 sealing；The diversion section 332 of low-pressure piston 33 outer wall and valve seat 34 it is hollow
It is again provided with sealing ring between inner wall, realizes the part sealing between low-pressure piston 33 and valve seat 34；Meanwhile 34 He of valve seat
Be provided with sealing between hollow 3121 wall body of the connecting pin 312 of low pressure valve deck 32 or low pressure valve body 31, it is therefore prevented that fluid from
It is revealed at valve seat 34；Also in being provided with gasket on valve seat lid 341, gasket is set to valve seat lid 341 close to low-pressure piston 33
Side prevent the fluid in deflector hole 333 so that low-pressure piston 33 is able to achieve sealing when moving to valve seat 341 side of lid
It is flowed out out of recirculation hole 342, sealing effect is more preferable.
Under original state, upper spring 25, the pre-pressing force of lower spring 26 and low pressure spring 35 are adjusted according to use demand.
When the upstream pressure of fluid is larger, the pressure that the decompression piston 24 of pressure reducing valve 2 is depressurized 211 this one end of import is first pushed away down, real
Existing decompression piston 24 moves down, and boss 217 and flap 27 separate at this time, realizes fluid from decompression import 211 to relief outlet
Supply is realized in 212 circulation, still, since fluid upstream pressure is larger, the low-pressure piston 33 of low pressure normally open valve 3 by low pressure into
The pressure of 3111 this one end of mouth is pushed valve seat 34 to and is resisted against on valve seat lid 341, so that between deflector hole 333 and recirculation hole 342
Connection disconnect, so that the closure of low pressure normally open valve 3 is realized, so that fluid flows out from pressure reducing valve 2；It is pressed before the valve of fluid
When power is smaller, the pressure that the decompression piston 24 of pressure reducing valve 2 can not be depressurized 211 this one end of import is pushed, at this time boss 217 and valve
Valve 27 presses, and pressure reducing valve 2 is in closed state, but the low-pressure piston 33 of low pressure normally open valve 3 is due to this one end of low pressure inlet 3111
Pressure it is smaller, low pressure spring 35 pushes low-pressure piston 33 to reset, realize being connected to for deflector hole 333 and recirculation hole 342, thus
Realize that fluid flows to low tension outlet 321 from low pressure inlet 3111, to realize supply.
The above is only preferred embodiments of the present invention, are not intended to limit the implementation manners and the protection scope of the present invention, right
For those skilled in the art, it should can appreciate that and all replace with being equal made by description of the invention and diagramatic content
It changes and obviously changes obtained scheme, should all be included within the scope of the present invention.
Claims (9)
1. a kind of rely on oneself controls the structure of the normally opened decompression of low pressure characterized by comprising filter and pressure adjusting structure, the mistake
Filter is set on pipe laying, and in the import for being connected with the pressure adjusting structure in the outlet of the filter, the pressure regulation
The outlet of structure is connected with service, wherein the pressure adjusting structure includes pressure reducing valve and low pressure normally open valve, and the pressure reducing valve
It is set side by side with the low pressure normally open valve.
2. according to claim 1 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that the filter includes
Valve body, strainer and capping are filtered, the filtering valve body is provided with linearly arrangement and disconnected filtered inlet and filters out
Mouthful, meanwhile, it is provided between the filtered inlet and the filtering outlet towards the inclined strainer mouth of the filtering outlet, institute
It states strainer mouth and is connected to the filtered inlet with the filtering outlet, and in being provided with the strainer in the strainer mouth, and in
The capping is bolted in the opening of the strainer mouth.
3. according to claim 1 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that the pressure reducing valve packet
It includes:
Reducing valve body offers decompression import, relief outlet, upper connectivity port and lower connectivity port, institute on the reducing valve body
It states decompression import and the relief outlet is oppositely arranged in the horizontal direction, the upper connectivity port and the lower connectivity port exist
It is oppositely arranged on vertical direction, and the upper connectivity port and the lower connectivity port are all set in the decompression import and described
Between relief outlet, meanwhile, the decompression import is connected to the top of the relief outlet by the upper connectivity port, described
Decompression import is connected to the lower part of the relief outlet by the lower connectivity port；
Valve deck is depressurized, the decompression valve deck is bolted in the opening of the upper connectivity port；
Bottom plug, the bottom plug are bolted in the opening of the lower connectivity port；
Decompression piston, the decompression piston are vertically arranged, and the upper end of the decompression piston is protruded into the upper connectivity port, lower end
It protrudes into the lower connectivity port, and be arranged with a flap in the lower end of the decompression piston；
Spring, the spring include upper spring and lower spring, and one end of the upper spring is resisted against the upper end of the decompression piston,
The other end is resisted against the pressure reducing valve and covers, and one end of the lower spring is resisted against on the flap, and the other end is resisted against described
On bottom plug.
4. according to claim 3 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that the decompression valve deck
The intermediate and setting direction along the upper connectivity port offers threaded through-hole, and the through-hole is interior and deviates from the upper connection
The side of port is bolted with adjustment seat, one end that the upper spring is resisted against the decompression valve deck protrude into the through-hole with it is described
Adjustment seat contact, meanwhile, it is provided in the opening of the through-hole and positioned at the adjustment seat away from the side of the upper spring
Headkerchief.
5. according to claim 3 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that on the reducing valve body
It is also provided with pressure tap, the pressure tap is connected between the upper connectivity port and the relief outlet and with the two, and
In being bolted with plug on the outside aperture of the pressure tap.
6. according to claim 3 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that the decompression piston is in
Three sections of variable cross-section settings, successively include the first seal section, the second seal section and third seal section, first seal section
Sectional area is greater than the sectional area of second seal section and the third seal section, and first seal section is set on described
In connectivity port, the third seal section is set in the lower connectivity port, and the flap is sheathed on the third sealing
Duan Shang, meanwhile, be provided with boss on the wall body in the lower connectivity port, when the decompression piston moves up, the boss and
The flap is laminated.
7. according to claim 1 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that the low pressure normally open valve
Include:
Low pressure valve body, the low pressure valve body are provided with input end and connecting pin, and the input end offers low pressure inlet, the company
Connect end be provided with it is hollow, the low pressure inlet with it is described it is hollow be arranged and be connected to along a straight line, and be spirally connected on the connecting pin
Have a low pressure valve deck, the low pressure valve deck offers low tension outlet away from the side of the connecting pin, and the low tension outlet and
The hollow connection；
Low-pressure piston, the low-pressure piston be set to it is described it is hollow in, offer and lead along its length in the low-pressure piston
Discharge orifice, one end of the deflector hole are connected to the low pressure inlet；
Valve seat, the valve seat are in hollow setting, and one end of the valve seat is sheathed on the low-pressure piston close to the low pressure valve deck
One end on, the other end of the valve seat is bolted with valve seat lid, on the wall body of the valve seat and is located at the middle region of the valve seat
Domain offers several recirculation holes；
Low pressure spring, the low pressure spring pocket are set on the low-pressure piston, and one end of the low pressure spring be resisted against it is described
On one end of the low pressure inlet, the other end is resisted against on the valve seat low-pressure piston.
8. according to claim 7 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that it is described it is hollow in also set
It is equipped with the spacer ring of annular, the spacer ring is located at the valve seat and offers gas on the side of the low-pressure piston, the spacer ring
Hole, and offer annular gas tank on the outer wall of the spacer ring and be connected to the stomata, while described in the low pressure valve body
Gas vent is offered on the wall body of connecting pin, and the gas vent is connected to the annular gas tank.
9. according to claim 7 rely on oneself controls the structure of the normally opened decompression of low pressure, which is characterized in that the low-pressure piston is in
Two sections of variable cross-section settings, the direction along the input end to the connecting pin successively include contact-segment and diversion section, described to connect
The sectional area for touching section is greater than the sectional area of the diversion section, and the deflector hole runs through the contact-segment and the diversion section, described
The outer wall of contact-segment fits on the hollow inner wall, and the low pressure spring pocket is set on the diversion section, and the low pressure
Spring is resisted against in the contact-segment close to one end of the low pressure inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810880070.9A CN108953714B (en) | 2018-08-03 | 2018-08-03 | Structure for automatically controlling low pressure to normally open and reduce pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810880070.9A CN108953714B (en) | 2018-08-03 | 2018-08-03 | Structure for automatically controlling low pressure to normally open and reduce pressure |
Publications (2)
| Publication Number | Publication Date |
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| CN108953714A true CN108953714A (en) | 2018-12-07 |
| CN108953714B CN108953714B (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810880070.9A Active CN108953714B (en) | 2018-08-03 | 2018-08-03 | Structure for automatically controlling low pressure to normally open and reduce pressure |
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| Country | Link |
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| CN (1) | CN108953714B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109821273A (en) * | 2019-04-10 | 2019-05-31 | 军事科学院军事医学研究院环境医学与作业医学研究所 | It is a kind of for water environment pathogenic microorganism enrichment decompression remove block apparatus |
| CN110307347A (en) * | 2019-07-19 | 2019-10-08 | 永嘉企达知识产权咨询有限公司 | A kind of high sealing pressure reducing valve |
| CN110523189A (en) * | 2019-08-27 | 2019-12-03 | 安徽江淮汽车集团股份有限公司 | Gas cleaning plant |
| CN114377521A (en) * | 2021-12-30 | 2022-04-22 | 广东红海湾发电有限公司 | Desulfurization absorption tower fire control unit |
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| CN110523189A (en) * | 2019-08-27 | 2019-12-03 | 安徽江淮汽车集团股份有限公司 | Gas cleaning plant |
| CN114377521A (en) * | 2021-12-30 | 2022-04-22 | 广东红海湾发电有限公司 | Desulfurization absorption tower fire control unit |
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|---|---|
| CN108953714B (en) | 2020-01-21 |
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