CN206001026U - A kind of constant pressure valve - Google Patents
A kind of constant pressure valve Download PDFInfo
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- CN206001026U CN206001026U CN201620974350.2U CN201620974350U CN206001026U CN 206001026 U CN206001026 U CN 206001026U CN 201620974350 U CN201620974350 U CN 201620974350U CN 206001026 U CN206001026 U CN 206001026U
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Abstract
The utility model discloses a kind of constant pressure valve, including the homophony wedge being tightly connected successively from top to bottom, valve body and valve seat, main valve plug is provided between the homophony wedge and valve body, the epicoele for acting on main valve plug bottom is provided with described valve body, auxiliary valve core is provided between the valve body and valve seat, the cavity of resorption for acting on auxiliary valve core bottom is provided with described valve seat, described valve body is provided with front port and rear port, the lumen for acting on auxiliary valve core top is provided with valve body, the epicoele is provided with the upper valve port connected with rear port, the main valve plug and the normally closed setting of upper valve port, the lumen is provided with the middle valve port connected with front port, the auxiliary valve core is arranged with middle valve port normal open, described front port respectively with epicoele, cavity of resorption is connected, described rear port is connected with lumen.The utility model aims to provide a kind of constant pressure valve that can switch air inlet, cut-out gas circuit and reverse exhaust according to admission pressure size.
Description
Technical field
The utility model belongs to valve field, more particularly to a kind of constant pressure valve.
Background technology
As industry is entered after automation and NC postprocessing system, compressed air has been increasingly becoming an important power
, often there are multiple valves in source in control gas circuit, and various valves each play respective function so as to reach 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, and which includes valve body, and valve body two ends offer the water inlet connected by water hole
Mouth and delivery port, are sealed with the screw rod coaxial with water hole on valve body, the head of screw rod is extended in the 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 delivery port, are provided with spring between water fender and the spring housing；The afterbody of screw rod extends to valve body
Outward and handwheel is fixed with 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 normally can run, and when train stops, then needs to be vented to anti-slip device, will be anti-slip
Device and track locking so that train temporarily keeps fixing with track.However, current constant pressure valve on the market, it is impossible to according to system
Pressure size is realizing positive air inlet and the reversely operation of exhaust so that control gas circuit is complex, and the reliability of system is difficult to
Ensure.
Utility model content
The utility model is to overcome above-mentioned deficiency of the prior art, there is provided one kind can be according to admission pressure size
Switching air inlet, cut-out gas circuit and the constant pressure valve being reversely vented.
To achieve these goals, the utility model is employed 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, the homophony wedge
Be provided with main valve plug and valve body between, in described valve body, be provided with the epicoele for acting on main valve plug bottom, the valve body and valve seat it
Between be provided with auxiliary valve core, be provided with the cavity of resorption for acting on auxiliary valve core bottom in described valve seat, described valve body be provided with front port and
Rear port, is provided with the lumen for acting on auxiliary valve core top in valve body, the epicoele is provided with the upper valve port connected with rear port, described
Main valve plug and the normally closed setting of upper valve port, the lumen are provided with the middle valve port connected with front port, and the auxiliary valve core is normal with middle valve port
Logical setting, described front port are connected with epicoele, cavity of resorption respectively, and described rear port is connected with lumen.
Be provided with main valve plug and the two valve elements of auxiliary valve core, and epicoele, lumen and cavity of resorption in constant pressure valve, front port respectively with
Epicoele, lumen are connected with cavity of resorption, and form the middle valve port coordinated with auxiliary valve core, rear port and epicoele in lumen, and lumen is distinguished
Connection, and the upper valve port coordinated with main valve plug is formed 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, so as to realize 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, so as to reality
Now reversely it is vented；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, to carry out automatically positive air inlet, reversely be vented and interrupt the switching of three states of air-flow, so as to meet
The demand of practical application, and gas circuit is simplified, 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 coordinated with 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, is adjusted homophony last item upper-lower position, is controlled the decrement of homophony pressing spring, so as to control
The spring force of homophony pressing spring processed, therefore improves the adaptability of constant pressure valve, is easy to adjust constant pressure valve according to actual requirement
Whole.
Preferably, being provided with secondary pressure regulating device in described valve seat, secondary pressure regulating device includes to coordinate 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, adjust have compressed for fine setting spring, from
And controlling 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, the main valve body and main valve lid
Between be provided with upper diaphragm, the edge of the upper diaphragm is fixed between homophony wedge and valve body, and the main valve body bottom is provided with
The upper sealing gasket that can coordinate with upper sealing valve port.Upper diaphragm is set, guide effect can be played to moving up and down for 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, the pair valve body and secondary valve gap body
Between be provided with lower diaphragm, the edge of the lower diaphragm is fixed between valve body and valve seat, is set between the valve body and secondary valve body
There is the auxiliary spring for acting on downwards secondary valve body.Lower diaphragm is set, guide effect can be played to moving up and down for 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 the pair valve body is provided with the effect end extended inside to lumen, the top at the effect end be provided with can with
The middle sealing gasket that sealing valve port coordinates.So, the middle sealing gasket for arranging on effect end can have preferably close between middle valve port
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 the lumen and effect end, between guide ring outer wall and middle cavity wall, it is oriented to
Sealing ring is equipped between ring inwall and effect end outer wall.Guide ring can play guide effect to moving up and down for auxiliary valve core, keep away
Exempt from auxiliary valve core directly to contact with lumen, also ensure that the mobile accuracy of auxiliary valve core.
The beneficial effects of the utility model are：（1）Positive air inlet is carried out automatically according to admission pressure, reversely exhaust and in
The switching of three states of stream of dying, meets the demand of practical application；（2）Running is reliable and stable, reduces control gas circuit complicated
Degree, saves production and maintenance cost；（3）The Opening pressure of main valve plug and auxiliary valve core can all be adjusted, with higher adaptation
Property.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation under the utility model air-suction state；
Fig. 3 is the structural representation under the utility model gas circuit dissengaged positions.
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, homophony pressure cap 9, homophony pressing spring 10, auxiliary spring 11, it is oriented to
Ring 12, cavity of resorption 13, finely tune spring 14, secondary pressure regulation cap 15, voltage regulation screw 16, homophony last item 17.
Specific embodiment
With reference to the accompanying drawings and detailed description the utility model is further described.
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 to
Under be sequentially arranged, and between homophony wedge and valve body, be all tightly connected between valve body and valve seat.Between homophony wedge and valve body
Main valve plug 6 is provided with, and main valve plug includes main valve body 6c and main valve lid 6a, film is provided between main valve body and main valve lid
Piece 6b, the edge of upper diaphragm are fixed between homophony wedge and valve body.Homophony press mechanism, homophony press mechanism is provided with homophony wedge
The homophony last item 17 coordinated including the positioning seat fixed with homophony wedge top and with positioning seat screw thread, is provided with homophony wedge
The homophony pressure cap 9 offseted with homophony last item lower end, is provided with homophony pressing spring 10 between homophony pressure cap and main valve plug, led by rotation
Homophony pressing spring is compressed by homophony pressure cap and upholds by pressure regulating axis, so as to adjustment effect in the spring force of main valve plug, is adjusted
Homophony last item can be locked by locking nut 8 after the completion of section.
Auxiliary valve core 2 is provided between valve body and valve seat, and auxiliary valve core includes secondary valve body 2a and pair valve gap body 2d, secondary valve body
Be provided with lower diaphragm 2b and secondary valve gap body between, the edge of lower diaphragm is 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.Secondary pressure regulating device is provided with valve seat, and secondary pressure regulating device includes and valve seat
Voltage regulation screw 16 and the secondary pressure regulation cap 15 offseted with voltage regulation screw upper end that bottom thread coordinates, 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.The active force of fine setting spring is adjusted by voltage regulation screw,
So as to finely tune the spring force for acting on auxiliary valve core.
Valve body is provided with front port 4b and rear port 4a, is provided with the epicoele 5 for 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 connected with rear port, and main valve body bottom is provided with can
The upper sealing gasket coordinated with upper sealing valve port.The cavity of resorption 13 for acting on auxiliary valve core bottom is provided with valve seat, and cavity of resorption is connected with front port
Logical.The lumen 3 for acting on auxiliary valve core top is provided with valve body, and lumen is provided with the middle valve port 402 connected with front port, sets 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 inside to lumen prolongs
The effect end 2c for stretching, the top for acting on end are provided with the middle sealing gasket that can coordinate with middle sealing valve port.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 without 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.The Opening pressure of main valve plug is can adjust by homophony last item, finely tunes 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 one side of front port air pressure
Face acts on lower diaphragm so that move on auxiliary valve core, and on the other hand middle sealing valve port, front port air pressure are acted on film by auxiliary valve core
Piece so that move on main valve plug, upper valve port opened by main valve plug, air-flow can the past port flow port backward, so as to realize 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, while auxiliary valve core return under auxiliary valve core effect, middle valve port is opened, air-flow can be from rear
Port flow port forward, so as to realize reversely exhaust.
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.As front port air pressure is more than auxiliary valve core Opening pressure, therefore, front port air pressure
Act on lower diaphragm so that move on auxiliary valve core, middle valve port is closed by auxiliary valve core, and now gas circuit is cut between front port and rear port
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, and train normally can 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 is opened and is vented to anti-slip device to below 0.05MPa, now auxiliary valve core so that anti-slip device and track locking so that fire
Car temporarily keeps fixing with track.
Claims (7)
1. a kind of constant pressure valve, is characterized in that, including the homophony wedge, valve body and the valve seat that are tightly connected successively from top to bottom, described
Main valve plug is provided between homophony wedge and valve body, is provided with the epicoele for acting on main valve plug bottom, the valve body in described valve body
Auxiliary valve core being provided with and valve seat between, being provided with the cavity of resorption for acting on auxiliary valve core bottom in described valve seat, described valve body is provided with
Front port and rear port, are provided with the lumen for acting on auxiliary valve core top in valve body, the epicoele is provided with connect with rear port upper
Valve port, the main valve plug and the normally closed setting of upper valve port, the lumen are provided with the middle valve port connected with front port, the auxiliary valve core with
Middle valve port normal open is arranged, and described front port is connected with epicoele, cavity of resorption respectively, and described rear port is connected with lumen.
2. a kind of constant pressure valve according to claim 1, is characterized in that, be provided with homophony press mechanism in described homophony wedge,
Homophony press mechanism includes the positioning seat that fixes with homophony wedge top and the homophony last item coordinated with positioning seat screw thread, main pressure regulator
It is provided with, in seat, the homophony pressure cap offseted with homophony last item lower end, between homophony pressure cap and main valve plug, is provided with homophony pressing spring.
3. a kind of constant pressure valve according to claim 1 and 2, is characterized in that, be provided with secondary pressure regulating device in described valve seat, secondary
Pressure regulating device includes the voltage regulation screw coordinated with seat bottom portion screw thread and the secondary pressure regulation cap offseted with voltage regulation screw upper end, secondary tune
Fine setting spring is provided between pressure cap and auxiliary valve core.
4. a kind of constant pressure valve according to claim 1 and 2, is characterized in that, described main valve plug include main valve body and
Main valve lid, is provided with upper diaphragm between the main valve body and main valve lid, the edge of the upper diaphragm is fixed on homophony wedge
And valve body between, the main valve body bottom is provided with the upper sealing gasket that can coordinate with upper sealing valve port.
5. a kind of constant pressure valve according to claim 1 and 2, is characterized in that, described auxiliary valve core include secondary valve body and
Secondary valve gap body, is provided with lower diaphragm between the pair valve body and secondary valve gap body, and the edge of the lower diaphragm is fixed on valve body and valve
Between seat, it is provided with, between the valve body and secondary valve body, the auxiliary spring for acting on downwards secondary valve body.
6. a kind of constant pressure valve according to claim 1 and 2, is characterized in that, be provided with positioning auxiliary spring in described valve body
Auxiliary spring seat, described lumen are arranged in auxiliary spring seat, and the upper end of the pair valve body is provided with the work extended inside to lumen
With end, the top at the effect end is provided with the middle sealing gasket that can coordinate with middle sealing valve port.
7. a kind of constant pressure valve according to claim 6, is characterized in that, be provided with guide ring between the lumen and effect end,
Sealing ring is equipped between guide ring outer wall and middle cavity wall, between guide ring inwall and effect end outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620974350.2U CN206001026U (en) | 2016-08-30 | 2016-08-30 | A kind of constant pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620974350.2U CN206001026U (en) | 2016-08-30 | 2016-08-30 | A kind of constant pressure valve |
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| Publication Number | Publication Date |
|---|---|
| CN206001026U true CN206001026U (en) | 2017-03-08 |
Family
ID=58194680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620974350.2U Active CN206001026U (en) | 2016-08-30 | 2016-08-30 | A kind of constant pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206001026U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107472231A (en) * | 2017-09-11 | 2017-12-15 | 眉山中车制动科技股份有限公司 | A kind of nested type one-way valve structures for vehicle automatic regulating apparatus |
| CN111397894A (en) * | 2020-04-24 | 2020-07-10 | 刘勇 | Pollution tolerance test system for gear shifting constant pressure valve |
-
2016
- 2016-08-30 CN CN201620974350.2U patent/CN206001026U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107472231A (en) * | 2017-09-11 | 2017-12-15 | 眉山中车制动科技股份有限公司 | A kind of nested type one-way valve structures for vehicle automatic regulating apparatus |
| CN107472231B (en) * | 2017-09-11 | 2023-08-08 | 眉山中车制动科技股份有限公司 | Nested one-way valve structure for automatic vehicle adjusting device |
| CN111397894A (en) * | 2020-04-24 | 2020-07-10 | 刘勇 | Pollution tolerance test system for gear shifting constant pressure valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |