CN106352124A - Constant pressure valve - Google Patents
Constant pressure valve Download PDFInfo
- Publication number
- CN106352124A CN106352124A CN201610752123.XA CN201610752123A CN106352124A CN 106352124 A CN106352124 A CN 106352124A CN 201610752123 A CN201610752123 A CN 201610752123A CN 106352124 A CN106352124 A CN 106352124A
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- Prior art keywords
- valve
- homophony
- valve body
- port
- main
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16K17/06—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 with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16K17/044—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 with more than one spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1268—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like with a plurality of the diaphragms
Abstract
The invention discloses a constant pressure valve, comprising a main pressure regulator seat consecutively connected from top to bottom, a valve body and a valve seat, wherein a main valve core is arranged between the valve body and the valve seat; a lower cavity is arranged inside the valve seat functioning on the bottom of main valve core; a front port and back port are arranged on the valve body; a middle cavity is set inside the valve body functioning on top of secondary valve core; an upper valve port is set in upper cavity which coordinates with the main valve core and is connected with the back port; a middle valve port is arranged in the middle cavity which coordinates with secondary valve core and is connected with the front port; the front port is connected respectively with upper cavity and lower cavity; and the back port is connected with middle cavity. The constant pressure valve is in purpose to provide a valve which can switchover air inflow, cut off gas circuit and exhaust in converse direction based on the inlet pressure.
Description
Technical field
The invention belongs to valve field, more particularly, to a kind of constant pressure valve.
Background technology
Enter after automatization and NC postprocessing system with industry, compressed air has been increasingly becoming an important power
Source, controlling in gas circuit often has multiple valves, and various valves each play respective function thus reaching corresponding design requirement.Its
In, for constant pressure valve, when gas pressure is higher than valve element Opening pressure, valve element is opened, so that gas circuit connection, and work as
When gas pressure is less than valve element Opening pressure, then valve element is closed, and gas circuit is cut off.As Chinese patent notification number:
Cn104455613a, discloses a kind of regulation constant pressure valve, it includes valve body, and valve body two ends offer the water inlet connecting by water hole
Mouth and outlet, valve body are sealed with the screw rod coaxial with water hole, the head of screw rod extends in described valve body, and in spiral shell
The head of bar is fixed with spring housing, and the head end of screw rod is equipped with guide pillar, and the end of guide pillar is fixed with and can cover water hole and hinder
Disconnected water inlet and the water fender of outlet, are provided with spring between water fender and described spring housing；The afterbody of screw rod extends to valve body
Outward and it is fixed with handwheel in end.
In actual applications, as rolling stock automatic anti-running system, when train is charged, need to inflate to anti-slip device, will
Anti-slip device is separated with track so that train can normally run, and when train stops, then needs to anti-slip device aerofluxuss, will be anti-slip
Device is with track locking so that train and track temporarily keep fixing.However, at present constant pressure valve on the market is it is impossible to according to system
Pressure size come to realize the operation of positive air inlet and reverse aerofluxuss so that control gas circuit complex, the reliability of system is difficult to
Ensure.
Content of the invention
The present invention is to overcome above-mentioned deficiency of the prior art, there is provided one kind can switch according to admission pressure size
The constant pressure valve of air inlet, cut-out gas circuit and reverse aerofluxuss.
To achieve these goals, the present invention employs the following technical solutions:
A kind of constant pressure valve, including the homophony wedge, valve body and the valve seat that are tightly connected successively from top to bottom, described homophony wedge and valve
It is provided with main valve plug between body, be provided with the epicoele acting on main valve plug bottom in described valve body, set between described valve body and valve seat
There is auxiliary valve core, in described valve seat, be provided with the cavity of resorption acting on auxiliary valve core bottom, described valve body is provided with front port and rear end
Mouthful, it is provided with the lumen acting on auxiliary valve core top in valve body, described epicoele is provided with upper with what main valve plug cooperation was connected with rear port
Valve port, described lumen is provided with and the auxiliary valve core middle valve port that connected with front port of cooperation, described front port respectively with epicoele, under
Chamber connects, and described rear port is connected with lumen, and the Opening pressure of described main valve plug is more than the Opening pressure of auxiliary valve core.
Be provided with main valve plug and this two valve elements of auxiliary valve core in constant pressure valve, and epicoele, lumen and cavity of resorption, front port respectively with
Epicoele, lumen connect with cavity of resorption, and form middle valve port, rear port and the epicoele with auxiliary valve core cooperation in middle intracavity, and lumen is respectively
Connection, and form the upper valve port with main valve plug cooperation at epicoele.So, present port pressure increases to opening more than main valve plug
When opening pressure, front port pressure acts on main valve plug and auxiliary valve core so that upper valve port is opened by main valve plug, and auxiliary valve core is by middle valve port
Close, air-flow can the past port flow port backward, thus realizing air inlet；Present port pressure is decreased to less than the unlatching of auxiliary valve core
During pressure, upper valve port is closed by main valve plug, and middle valve port is opened by auxiliary valve core, and air-flow can flow to front port from rear port, thus real
Now reversely aerofluxuss；When present port pressure is between main valve plug and auxiliary valve core Opening pressure, upper valve port is closed by main valve plug, with
When auxiliary valve core also by middle valve port close, now between front port and rear port gas circuit be cut off.Constant pressure valve in this programme can root
According to front port pressure, automatically to carry out positive air inlet, reverse aerofluxuss and the switching interrupting three states of air-flow, thus meeting
The demand of practical application, and simplify gas circuit, reduce production and maintenance cost.
Preferably, being provided with homophony press mechanism in described homophony wedge, homophony press mechanism includes and homophony wedge top
Fixing positioning seat and the homophony last item with the cooperation of positioning seat screw thread, are provided with homophony wedge and are offseted with homophony last item lower end
Homophony pressure cap, is provided with homophony pressing spring between homophony pressure cap and main valve plug.So, main valve plug Opening pressure can as needed certainly
Row is adjusted, and by rotating homophony last item, adjusting homophony last item upper-lower position, controlling the decrement of homophony pressing spring, thus controlling
The spring force of homophony pressing spring processed, therefore improves the adaptability of constant pressure valve, is easy to according to actual requirement, constant pressure valve be adjusted
Whole.
Preferably, being provided with secondary pressure regulating device in described valve seat, secondary pressure regulating device includes coordinating with seat bottom portion screw thread
Voltage regulation screw and with the secondary pressure regulation cap that voltage regulation screw upper end offsets, be provided with fine setting spring between secondary pressure regulation cap and auxiliary valve core.
Auxiliary valve core Opening pressure can be adjusted as needed, by rotating voltage regulation screw, to adjust have compressed of fine setting spring, from
And control the Opening pressure of auxiliary valve core so that auxiliary valve core Opening pressure is less than main valve plug Opening pressure.
Preferably, described main valve plug includes main valve body and main valve lid, described main valve body and main valve lid
Between be provided with upper diaphragm, described on touch the edge of piece and be fixed between homophony wedge and valve body, described main valve body bottom is provided with
Can be with the upper sealing gasket of upper sealing valve port cooperation.Setting upper diaphragm, can play guide effect to moving up and down of main valve plug, it is to avoid
Direct effect between main valve plug and valve body, improves the life-span of main valve plug.
Preferably, described auxiliary valve core includes secondary valve body and secondary valve gap body, described pair valve body and secondary valve gap body
Between be provided with lower diaphragm, described under touch the edge of piece and be fixed between valve body and valve seat, set between described valve body and secondary valve body
There is the auxiliary spring acting on downwards secondary valve body.The lower diaphragm of setting, can play guide effect to moving up and down of auxiliary valve core, it is to avoid
Direct effect between auxiliary valve core and valve body, improves the life-span of auxiliary valve core.
Preferably, being provided with the auxiliary spring seat of positioning auxiliary spring in described valve body, described lumen is arranged on auxiliary spring
In seat, the upper end of described pair valve body is provided with the effect end extending to the inside of lumen, the top at described effect end be provided with can with
The middle sealing gasket of sealing valve port cooperation.So, middle sealing gasket effect end being arranged can have preferably close and middle valve port between
Envelope effect, when positive air inlet it is ensured that the air of front port smoothly can flow to rear port through main valve plug.
Preferably, being provided with guide ring between described lumen and effect end, between guide ring outer wall and middle cavity wall, guide
It is equipped with sealing ring between ring inwall and effect end outer wall.Guide ring can play guide effect to moving up and down of auxiliary valve core, keeps away
Exempt from auxiliary valve core directly to contact with lumen, also ensure that the mobile accuracy of auxiliary valve core.
Preferably, the upper end of described homophony last item is provided with the locking nut acting on homophony wedge top, described locking
Nut includes main paragraph and only puts section, and the outer end of described main paragraph is provided with big footpath section, and the perisporium of described big footpath section is provided with pendulum groove,
Described only pendulum section is provided with yaw, and described only pendulum section is rotationally located in the section of described big footpath, and described yaw is plugged on described pendulum
In groove, between described yaw and pendulum groove, it is provided with swing gap, the screw thread of the screw thread of described main paragraph and described only pendulum section can adjust
To on same helix.So when producing vibration, the meeting between the screw thread of main paragraph and the only screw thread of pendulum section produces wrong
The change that folding is held together, makes the screw thread of the two not on same helix when staggering, play and hinder the effect loosening, thus avoiding
Homophony last item is moved, and so that the active force of homophony pressing spring is consistent.
The invention has the beneficial effects as follows: (1) according to admission pressure automatically carry out positive air inlet, reverse aerofluxuss and in die
The switching of three states of stream, meets the demand of practical application；(2) running is reliable and stable, reduces and controls gas circuit complexity, section
About produce and maintenance cost；(3) Opening pressure of main valve plug and auxiliary valve core all can be adjusted, and has higher adaptability.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation under air-suction state of the present invention；
Fig. 3 is the structural representation under gas circuit dissengaged positions of the present invention；
Fig. 4 is the structural representation of locking nut in embodiment 2 in the present invention；
Fig. 5 is the structural representation in a direction in Fig. 4；
Fig. 6 is the sectional view in b-b direction in Fig. 5.
In figure: valve seat 1, auxiliary valve core 2, secondary valve body 2a, lower diaphragm 2b, act on end 2c, secondary valve gap body 2d, lumen 3, valve body
4, rear port 4a, front port 4b, auxiliary spring seat 4c, upper valve port 401, middle valve port 402, epicoele 5, main valve plug 6, main valve lid 6a,
Upper diaphragm 6b, main valve body 6c, homophony wedge 7, locking nut 8, main paragraph 811, only put section 812, big footpath section 813, put groove
814, yaw 815, helix alignment's maintaining body 82, come directly towards 821, come directly towards drive mechanism 822, the first driving post 8221, the second drive
Dynamic post 8222, inserts spring 8223, drives post fastening screw 8224, drives post to depart from spring 825, swings gap 83, main pressure regulator
Cap 9, homophony pressing spring 10, auxiliary spring 11, guide ring 12, cavity of resorption 13, finely tune spring 14, secondary pressure regulation cap 15, voltage regulation screw 16, master
Pressure regulating axis 17.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment 1:
In embodiment as shown in Figure 1, a kind of constant pressure valve, including homophony wedge 7, valve body 4 and valve seat 1, three from top to bottom according to
Between secondary arrangement, and homophony wedge and valve body, all it is tightly connected between valve body and valve seat.It is provided between homophony wedge and valve body
Main valve plug 6, main valve plug includes main valve body 6c and main valve lid 6a, is provided with upper diaphragm between main valve body and main valve lid
6b, the edge above touching piece is fixed between homophony wedge and valve body.It is provided with homophony press mechanism, homophony press mechanism bag in homophony wedge
Include and positioning seat that homophony wedge top is fixing and the homophony last item 17 with the cooperation of positioning seat screw thread, be provided with homophony wedge with
The homophony pressure cap 9 that homophony last item lower end offsets, is provided with homophony pressing spring 10 between homophony pressure cap and main valve plug, by rotating homophony
Homophony pressing spring is compressed by homophony pressure cap and upholds by last item, thus adjustment effect is in the spring force of main valve plug.
It is provided with auxiliary valve core 2, auxiliary valve core includes secondary valve body 2a and secondary valve gap body 2d, secondary valve body between valve body and valve seat
Be provided with lower diaphragm 2b and secondary valve gap body between, under touch the edge of piece and be fixed between valve body and valve seat, valve body and secondary valve body it
Between auxiliary spring 11, auxiliary spring acts on secondary valve body top.It is provided with secondary pressure regulating device, secondary pressure regulating device includes and valve seat in valve seat
The voltage regulation screw 16 of bottom thread cooperation and the secondary pressure regulation cap 15 offseting with voltage regulation screw upper end, secondary pressure regulation cap and auxiliary valve core it
Between be provided with fine setting spring 14, fine setting spring act on auxiliary valve core upwards.Adjust the active force of fine setting spring by voltage regulation screw,
Thus fine setting acts on the spring force of auxiliary valve core.
Valve body is provided with front port 4b and rear port 4a, is provided with the epicoele 5 acting on main valve plug bottom, front port in valve body
All connect with epicoele with rear port, the bottom of epicoele is provided with the upper valve port 401 connecting with rear port, and main valve body bottom is provided with can
Upper sealing gasket with the cooperation of upper sealing valve port.It is provided with the cavity of resorption 13 acting on auxiliary valve core bottom, cavity of resorption is with front port even in valve seat
Logical.It is provided with the lumen 3 acting on auxiliary valve core top, lumen is provided with the middle valve port 402 connecting with front port, sets in valve body in valve body
There is the auxiliary spring seat 4c of positioning auxiliary spring, lumen is arranged in auxiliary spring seat, and the upper end of secondary valve body is provided with prolongs to the inside of lumen
The effect end 2c stretching, the top at effect end is provided with can be with the middle sealing gasket of middle sealing valve port cooperation.Set between lumen and effect end
There is guide ring 12, between guide ring outer wall and middle cavity wall, between guide ring inwall and effect end outer wall, be equipped with sealing ring.
When not having gas pressure in main valve plug and auxiliary valve core, main valve plug and upper valve port are in normally off, auxiliary valve core and
Middle valve port is in normal open state.Can adjust the Opening pressure of main valve plug by homophony last item, finely tune secondary valve by voltage regulation screw
The Opening pressure of core, the Opening pressure of main valve plug should be greater than the Opening pressure of auxiliary valve core.Front port and rear port are accessed
After in gas circuit, when present port pressure increases to the Opening pressure more than main valve plug, as shown in Fig. 2 front port air pressure one side
Face acts on lower diaphragm so that moving on auxiliary valve core, and middle sealing valve port, front port air pressure another aspect are acted on film by auxiliary valve core
Piece so that moving on main valve plug, upper valve port opened by main valve plug, air-flow can the past port flow port backward, thus realizing air inlet.
As shown in figure 1, when present port pressure is decreased to less than the Opening pressure of auxiliary valve core, main valve plug is in homophony pressing spring
The lower return of effect, upper valve port is closed, and auxiliary valve core return under auxiliary valve core effect, middle valve port is opened, air-flow can be from rear simultaneously
Port flow port forward, thus realize reverse aerofluxuss.
As shown in figure 3, when present port pressure is between main valve plug and auxiliary valve core Opening pressure, main valve plug is in main pressure regulator
Return under spring effect, upper valve port is closed.Because front port air pressure is more than auxiliary valve core Opening pressure, therefore, front port air pressure
Act on lower diaphragm so that moving on auxiliary valve core, middle valve port is closed by auxiliary valve core, and now between front port and rear port, gas circuit is cut
Disconnected.
In actual moving process, such as rolling stock automatic anti-running system, when train is charged, system pressure is increased to
More than 0.5mpa, now main valve plug open to anti-slip device inflate so that anti-slip device is separated with track, train can normally run.
When train even running, system pressure suitably reduces, and keeps anti-slip device and the detached state of track.The system when train stops
Reduced pressure to below 0.05mpa, now auxiliary valve core open to anti-slip device aerofluxuss so that anti-slip device with track locking so that fire
Car and track temporarily keep fixing.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1, and the upper end of homophony last item is additionally provided with the lock acting on homophony wedge top
Jack panel 8, as shown in figure 4, locking nut 8 includes main paragraph 811, only pendulum section 812 and helix alignment's maintaining body 82.Main paragraph
811 outer end is provided with big footpath section 813.The perisporium of big footpath section 813 is provided with pendulum groove 814.Only pendulum section 812 is provided with yaw 815.Only put
Section 812 is rotationally located in big footpath section 813.Yaw 815 is plugged in pendulum groove 814.
Helix alignment's maintaining body 82 includes coming directly towards 821 and top drive mechanism 822.Top 821 is arranged on only pendulum section 812
Interior.Top drive mechanism 822 includes the first driving post 8221 and the second driving post 8222.First drives post 8221 and the second driving
Post is arranged in yaw 815, and stretches out the outer face only putting section 812.
Referring to Fig. 5, putting groove 814 has three, and accordingly yaw 815 also wants three.Three pendulum grooves 814 are along only pendulum section 812
Circumferentially distributed.Do not have to be designed with helix alignment's maintaining body 82 between yaw and pendulum groove.Only pendulum section 812 is according in figure side clockwise
To when turning to yaw 815 and abutting together with a side of sidewall portion 8141 of pendulum groove, another side of sidewall portion 8142 of yaw 815 and pendulum groove
Between produce and swing the screw thread of gap 83, the screw thread of main paragraph 811 and only pendulum section 812 and be located on same helix.
Referring to Fig. 6, come directly towards drive mechanism 822 and also include driving post fastening screw 8224, insertion spring 8223 and drive post
Depart from spring 8225.Post fastening screw 8224 is driven to be located in big footpath section 813 and be inserted in yaw 815.Insertion spring
8223 are located in big footpath section 813.
When locking nut 8 is screwed on homophony last item, press the first drive rod 8221, the first drive rod 8221 drives top
821 extend into by being connected to and making the one of the same pendulum groove of yaw 815 on another side of sidewall portion 8142 of pendulum groove in swing gap 83
Side of sidewall portion 8141 abuts together and so that the screw thread of main paragraph 811 is located at same spiral with only putting the helix alignment of section 812
On line, now drive driving post fastening screw 8224 to be inserted in the first driving post 8221 in the presence of insertion spring 8223,
The first driving post 8221 is made to be maintained at current state (state of the position being connected on another side of sidewall portion of pendulum groove will be come directly towards).
Make convenient and strength-saving during rotation lock nut.
When locking nut and homophony nodal axisn are screwed together, pressing the second driving post 8222, second drives post 8222 to drive
Drive post fastening screw 8224 to depart from the first driving post 8221, drive post to depart from spring 825 and drive the first driving post 8221 to eject
And lose the driving effect to top 821 and so that drive post fastening screw 8224 can not be inserted into the first driving post 8221
Interior.Now only can relatively rotate between pendulum section 812 and main paragraph 811, vibrated and when having the trend of disengaging, only put section
812 and the rotation of main paragraph 811 screw thread of the two can be led to stagger, thus stoping the generation of abjection.
Claims (8)
1. a kind of constant pressure valve, is characterized in that, including the homophony wedge (7) being tightly connected successively from top to bottom, valve body (4) and valve seat
(1), it is provided with main valve plug (6) between described homophony wedge (7) and valve body (4), be provided with described valve body (4) and act on main valve plug
(6) epicoele (5) of bottom, is provided with auxiliary valve core (2), is provided with work in described valve seat (1) between described valve body (4) and valve seat (1)
For the cavity of resorption (13) of auxiliary valve core (2) bottom, described valve body (4) is provided with front port (4b) and rear port (4a), valve body (4)
Inside it is provided with the lumen (3) acting on auxiliary valve core (2) top, described epicoele (5) is provided with and main valve plug (6) cooperation and rear port
(4a) the upper valve port (401) connecting, described lumen (3) is provided with the middle valve port connecting with auxiliary valve core (2) cooperation with front port (4b)
(402), described front port (4b) is connected with epicoele (5), cavity of resorption (13) respectively, and described rear port (4a) is with lumen (3) even
Logical, the Opening pressure of described main valve plug (6) is more than the Opening pressure of auxiliary valve core (2).
2. constant pressure valve according to claim 1, is characterized in that, is provided with homophony press mechanism in described homophony wedge (7), main
Pressure regulating device includes the positioning seat fixing with homophony wedge (7) top and the homophony last item (17) with the cooperation of positioning seat screw thread,
Be provided with the homophony pressure cap (9) offseting with homophony last item (17) lower end in homophony wedge (7), homophony pressure cap (9) and main valve plug (6) it
Between be provided with homophony pressing spring (10).
3. constant pressure valve according to claim 1 and 2, is characterized in that, is provided with secondary pressure regulating device in described valve seat (1), secondary
Pressure regulating device includes voltage regulation screw (16) and the pair offseting with voltage regulation screw (16) upper end with the cooperation of valve seat (1) bottom thread
Pressure regulation cap (15), is provided with fine setting spring (14) between secondary pressure regulation cap (15) and auxiliary valve core (2).
4. constant pressure valve according to claim 1 and 2, is characterized in that, described main valve plug (6) include main valve body (6c) with
And main valve lid (6a), be provided with upper diaphragm (6b) between described main valve body (6c) and main valve lid (6a), described on touch piece
Edge is fixed between homophony wedge (7) and valve body (4), and described main valve body (6c) bottom is provided with can be close with upper valve port (401)
The upper sealing gasket of envelope cooperation.
5. constant pressure valve according to claim 1 and 2, is characterized in that, described auxiliary valve core (2) include secondary valve body (2a) with
And secondary valve gap body (2d), be provided with lower diaphragm (2b) between described pair valve body (2a) and pair valve gap body (2d), described under touch piece
Edge is fixed between valve body (4) and valve seat (1), is provided with and acts on downwards pair between described valve body (4) and secondary valve body (2a)
The auxiliary spring (11) of valve body (2a).
6. constant pressure valve according to claim 1 and 2, is characterized in that, is provided with positioning auxiliary spring (11) in described valve body (4)
Auxiliary spring seat (4c), described lumen (3) is arranged in auxiliary spring seat (4c), the upper end of described pair valve body (2a) be provided with to
The effect end (2c) extending inside lumen (3), the top of described effect end (2c) is provided with can be with middle valve port (402) sealing cooperation
Middle sealing gasket.
7. constant pressure valve according to claim 6, is characterized in that, is provided with guiding between described lumen (3) and effect end (2c)
Ring (12), between guide ring (12) outer wall and lumen (3) inwall, guide ring (12) inwall and effect end (2c) outer wall between be all provided with
There is sealing ring.
8. constant pressure valve according to claim 1 and 2, is characterized in that, the upper end of described homophony last item (17) is provided with and acts on
The locking nut (8) at homophony wedge (7) top, described locking nut (8) includes main paragraph (811) and only puts section (812), described
The outer end of main paragraph (811) is provided with big footpath section (813), and the perisporium of described big footpath section (813) is provided with pendulum groove (814), described only
Pendulum section (812) is provided with yaw (815), and described only pendulum section (812) is rotationally located in described big footpath section (813), described pendulum
Head (815) is plugged in described pendulum groove (814), is provided with swing gap (83), institute between described yaw (815) and pendulum groove (814)
The screw thread of the screw thread and described only pendulum section (812) of stating main paragraph (811) can tune on same helix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610752123.XA CN106352124B (en) | 2016-08-30 | 2016-08-30 | Constant pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610752123.XA CN106352124B (en) | 2016-08-30 | 2016-08-30 | Constant pressure valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106352124A true CN106352124A (en) | 2017-01-25 |
| CN106352124B CN106352124B (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610752123.XA Active CN106352124B (en) | 2016-08-30 | 2016-08-30 | Constant pressure valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107676320A (en) * | 2017-09-05 | 2018-02-09 | 芜湖中意液压科技股份有限责任公司 | A kind of hydraulic valve |
| CN109027397A (en) * | 2018-08-27 | 2018-12-18 | 辰星仪表（成都）有限公司 | A kind of pneumatic amplifier |
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| US10955063B2 (en) | 2018-08-27 | 2021-03-23 | Mercury Instruments (Chengdu) Corporation | Pneumatic amplifier |
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| CN106352124B (en) | 2018-10-12 |
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