CN203009947U - Novel air filtering and pressure reducing valve for pneumatic instrument - Google Patents
Novel air filtering and pressure reducing valve for pneumatic instrument Download PDFInfo
- Publication number
- CN203009947U CN203009947U CN 201220647107 CN201220647107U CN203009947U CN 203009947 U CN203009947 U CN 203009947U CN 201220647107 CN201220647107 CN 201220647107 CN 201220647107 U CN201220647107 U CN 201220647107U CN 203009947 U CN203009947 U CN 203009947U
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- spool
- pressure reducing
- supporting sleeve
- air filtering
- telescopic
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Abstract
The utility model relates to a novel air filtering and pressure reducing valve for a pneumatic instrument, which is suitable for providing clean air source devices with different pressures and flow rates for the pneumatic instrument. The novel air filtering and pressure reducing valve for the pneumatic instrument is characterized in that a regulating valve element consists of a valve element rod (1) and a sleeve-type valve element (3); the lower end of the valve element rod (1) is connected with the upper end of the sleeve-type valve element (3); the novel air filtering and pressure reducing valve also comprises a valve element supporting sleeve (5) arranged on a tray (6); the lower end of the sleeve-type valve element (3) extends into the valve element supporting sleeve (5); and a return spring (4) is arranged in the sleeve-type valve element (3) and the valve element supporting sleeve (5), so that the sleeve-type valve element (3) can linearly slide along the inner wall of the valve element supporting sleeve (5). According to the novel air filtering and pressure reducing valve for the pneumatic instrument, which is provided by the utility model, the pressure regulating valve element of the pressure reducing valve adopting the structural design has a large flow area, has a small unbalance force and large output flow; and rigidity of a required pressure regulating spring and a pressed area of the diaphragm tray part are small.
Description
Technical field
The utility model relates to a kind of pneumatic instrument novel air filtering pressure reducing valve, and being applicable to provides the different pressures of cleaning and the compressed air source unit of flow for pneumatic instrument.
Background technique
As shown in Figure 1, traditional air-filtering reduction valve complete machine structure is as follows: drain chamber, relief chamber, spring chamber have formed the shell mechanism of reduction valve; Cross filter ruffle and be fixed on relief chamber by pallet, the pressurized air that is used for the pressure P 1 of input filters; The lower end of adjusting pressuring valve core is equipped with Returnning spring and is made adjusting pressuring valve core and relief chamber lower end realization sealing; The diaphragm support parts are fixed by spring chamber and relief chamber; The supply gas pressure scope of the pressure P 1 of reduction valve input is generally 0.14～1MPa, and pressure P 2 is the setting delivery pressure of reduction valve, pressure P 2≤P1.
The working principle of reduction valve is as follows: the adjusting pressuring handle of rotating pressure-decreasing valve, pressure adjusting spring is compressed, the diaphragm support parts can be subject to downward spring force F3, the pressure P 2 of reduction valve output acts on diaphragm support parts lower ends, produce air pressure thrust F2 upwards, pressure F1 is that adjusting pressuring valve core is subject to unbalanced force upwards.When pressure F3＞(F2+F1), the diaphragm parts promote valve core rod, adjusting pressuring valve core moves downward, and the reduction valve output flow increases, and delivery pressure raises, simultaneously stressed the reducing of pressure F1; When the delivery pressure of reduction valve continues to increase, during the spring force F3 of diaphragm parts＜(F2+F1), sealing is realized in adjusting pressuring valve core adjusting pressuring valve core and relief chamber lower end under the effect of Returnning spring, and the reduction valve output flow reduces, delivery pressure reduces, simultaneously the stressed increase of pressure F1.Reduction valve is realized the delivery pressure setting by the opening and closing of the Force balance control adjusting pressuring valve core of change diaphragm parts.
high-flow pressure reducing valve has larger adjusting pressuring valve core, because the unbalanced force F1 of the excessive generation of compression area is larger, therefore the spring force F3 and power (F2+F1) balance that need the pressure adjusting spring generation of large rigidity, simultaneously when adjusting pressuring valve core is opened because pressure P 1 and pressure P 2 are almost equal, F1 is less for this unbalanced force, when adjusting pressuring valve core is closed because pressure P 1 and P2 pressure reduction are large, unbalanced force F1 increases, so just caused adjusting pressuring valve core to have a variability imbalance power F1, cause the concussion of adjusting pressuring valve core, simultaneously along with the pressure reduction between supply gas pressure P1 and output setting pressure P2 increases, uneven F1 also can increase.Only have the unbalanced force F1 of the less generation of circulation area of adjusting pressuring valve core enough little, in the time of can ignoring for spring force F3 and thrust F2 impact, reduction valve can work.So when adopting this kind structure fabrication high-flow pressure reducing valve, need the rigidity of pressure adjusting spring and diaphragm support parts compression area enough large, therefore the reduction valve profile of this structure is large, cost is high, is unfavorable for simultaneously the stable operation of reduction valve from working principle.
The model utility content
The purpose of this utility model is to provide that a kind of overall volume is little, pressure adjusting spring rigidity is low, large pressure reduction output stability is good, pneumatic instrument novel air filtering pressure reducing valve that the complete machine cost is low.
Pneumatic instrument novel air filtering pressure reducing valve, the regulating spool that comprises relief chamber and pass in the middle of this relief chamber, the lower end of this regulating spool is connected with Returnning spring, also comprise pallet, be characterized in: described regulating spool is comprised of valve core rod and telescopic spool, and the lower end of this valve core rod is connected with the upper end of telescopic spool; Also comprise the spool supporting sleeve that is arranged on described pallet, and the lower end of aforementioned telescopic spool is stretched in this spool supporting sleeve, in this telescopic spool and spool supporting sleeve, described Returnning spring is installed, thereby makes the telescopic spool can be along the inwall linear slide of spool supporting sleeve.
Wherein the upper end of spool supporting sleeve is connected and hermetic seal with the seal valve seat outer wall of relief chamber, and have the flow window on this spool supporting sleeve, and have the balance vent on telescopic spool, make the air-flow switching thereby open or close the flow window when telescopic spool moves.
Wherein have at least 2 balance vents with side, valve core rod joint on telescopic spool.
Wherein telescopic spool stretches on the outer wall of spool supporting sleeve gas sealing mechanism is installed.
Wherein gas sealing mechanism adopts seal ring.
Wherein the spool supporting sleeve is fixedly mounted on pallet by fastening piece.
Wherein telescopic spool is the tubbiness that Open Side Down, and outer surface in the top is sealing surface, realizes hermetic seal thereby coordinate with the seal valve seat lower end of relief chamber and spool supporting sleeve inwall when spool is closed.
The utility model provides a kind of pneumatic instrument novel air filtering pressure reducing valve, and the adjusting pressuring valve core circulation area of the reduction valve of this structural design of employing is large, and the spool unbalanced force is little, and output flow is large; The compression area of the rigidity of required pressure adjusting spring and diaphragm support parts is less; The reduction valve uneven compression area of adjusting pressuring valve core in the course of the work is very little, and the unbalanced force of generation can be ignored, and is conducive to the stable voltage of reduction valve.Adopt the mass flow air filtering pressure reducing valve of technical solutions of the utility model to have the advantages that overall volume is little, pressure adjusting spring rigidity is low, large pressure reduction output stability is good, the complete machine cost is low.Arrange by the compressive force of rotation adjusting pressuring handle to pressure adjusting spring, reduction valve just can provide the different pressures of cleaning and the pressurized air of flow for pneumatic instrument.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model background technique;
Accompanying drawing 2 is structural representation of the present utility model;
Accompanying drawing 3 is the structural representation of the utility model middle sleeve formula spool (3) and peripheral attachment portion thereof;
Accompanying drawing 4 is the sectional view of the utility model middle sleeve formula spool (3);
Accompanying drawing 5 is the outline drawing of the utility model middle sleeve formula spool (3).
Embodiment
As shown in Fig. 2,3,4,5, the utility model is a kind of pneumatic instrument novel air filtering pressure reducing valve, the regulating spool that comprises relief chamber 2 and pass in the middle of this relief chamber 2, the lower end of this regulating spool is connected with Returnning spring 4, also comprise pallet 6, described regulating spool is comprised of valve core rod 1 and telescopic spool 3, and the lower end of this valve core rod 1 is connected with the upper end of telescopic spool 3; Also comprise the spool supporting sleeve 5 that is arranged on described pallet 6, and the lower end of aforementioned telescopic spool 3 is stretched in this spool supporting sleeve 5, in this telescopic spool 3 and spool supporting sleeve 5, described Returnning spring 4 is installed, thereby makes the telescopic spool 3 can be along the inwall linear slide of spool supporting sleeve 5.
Wherein the upper end of spool supporting sleeve 5 is connected and hermetic seal with seal valve seat 7 outer walls of relief chamber 2, and have flow window 11 on this spool supporting sleeve 5, and have balance vent 10 on telescopic spool 3, make the air-flow switching thereby open or close flow window 11 when telescopic spool 3 moves, specifically have 2 balance vents 10 with valve core rod 1 joint is other on telescopic spool 3.Telescopic spool 3 stretches on the outer wall of spool supporting sleeve 5 gas sealing mechanism is installed in addition, and this gas sealing mechanism adopts seal ring 9.
Wherein spool supporting sleeve 5 is fixedly mounted on pallet 6 by fastening piece.Telescopic spool 3 is the tubbiness that Open Side Down, on outer surface in the top, gas sealing mechanism is installed, and realizes hermetic seal thereby coordinate with seal valve seat 7 lower ends of relief chamber 2 and spool supporting sleeve 5 inwalls when spool is closed.
Working principle of the present utility model is as follows:
Regulate the handle of reduction valve, pressure adjusting spring is compressed, and the diaphragm parts can be subject to downward spring force F3; The gas pressure P2 of reduction valve output acts on diaphragm support 6 parts lower ends, produces air pressure thrust F2 upwards, and pressure F1 to be adjusting pressuring valve core be subject to unbalanced force upwards, because lifting surface area is less, the power value of pressure F1 can be ignored.
When pressure F3＞F2, the diaphragm parts promote valve core rod 1, telescopic spool 3 moves downward, Returnning spring 4 is compressed, the sealing surface 8 of telescopic spool 3 is thrown off with the seal valve seat of relief chamber 27, gas pressure P1 is by the flow window 11 of spool supporting sleeve 5, the sealing surface 8 of telescopic spool 3 is exported with the gap that the seal valve seat of relief chamber 27 is thrown off, and the reduction valve output flow increases, and delivery pressure P2 raises.When the delivery pressure P2 of reduction valve continues to increase, during the pressure F3 of diaphragm parts＜F2, valve core rod 1 upwards produces displacement, telescopic spool 3 moves upward under the effect of Returnning spring 4, the sealing surface 8 of telescopic spool 3 is realized sealing with the seal valve seat of relief chamber 27, the reduction valve output flow reduces, and reduction valve output gas pressure P1 reduces.
The opening and closing that reduction valve is controlled telescopic spool 3 by the equilibrium of forces that changes the diaphragm parts realize the delivery pressure setting.Adopt the high-flow pressure reducing valve of this kind structure, because the compression area of telescopic spool 3 is very little, the unbalanced force F1 that telescopic spool 3 produces is also very little, can ignore.The precompression F3 that pressure adjusting spring produces just can realize the stable voltage of reduction valve as long as be created in thrust F2 equilibrium of forces on spring tray 6 with gas pressure P2.
Claims (7)
1. pneumatic instrument novel air filtering pressure reducing valve, the regulating spool that comprises relief chamber (2) and pass in the middle of this relief chamber (2), the lower end of this regulating spool is connected with Returnning spring (4), also comprise pallet (6), it is characterized in that: described regulating spool is comprised of valve core rod (1) and telescopic spool (3), and the lower end of this valve core rod (1) is connected with the upper end of telescopic spool (3); Also comprise the spool supporting sleeve (5) that is arranged on described pallet (6), and the lower end of aforementioned telescopic spool (3) is stretched in this spool supporting sleeve (5), in this telescopic spool (3) and spool supporting sleeve (5), described Returnning spring (4) is installed, thereby makes the telescopic spool (3) can be along the inwall linear slide of spool supporting sleeve (5).
2. pneumatic instrument as claimed in claim 1 novel air filtering pressure reducing valve, it is characterized in that: wherein the upper end of spool supporting sleeve (5) is connected and hermetic seal with seal valve seat (7) outer wall of relief chamber (2), and have flow window (11) on this spool supporting sleeve (5), and have balance vent (10) on telescopic spool (3), make the air-flow switching thereby open or close flow window (11) when telescopic spool (3) is mobile.
3. pneumatic instrument as claimed in claim 2 novel air filtering pressure reducing valve, is characterized in that: wherein go up and other at least 2 the balance vents (10) that have in valve core rod (1) joint at telescopic spool (3).
4. pneumatic instrument as claimed in claim 1 novel air filtering pressure reducing valve is characterized in that: wherein telescopic spool (3) stretches on the outer wall of spool supporting sleeve (5) gas sealing mechanism is installed.
5. pneumatic instrument as claimed in claim 4 novel air filtering pressure reducing valve is characterized in that: wherein gas sealing mechanism adopts seal ring (9).
6. pneumatic instrument as claimed in claim 1 novel air filtering pressure reducing valve, it is characterized in that: wherein spool supporting sleeve (5) is fixedly mounted on pallet (6) by fastening piece.
7. pneumatic instrument novel air filtering pressure reducing valve as described in any one in claim 1 to 6, it is characterized in that: wherein telescopic spool (3) is the tubbiness that Open Side Down, outer surface in the top is sealing surface (8), realizes hermetic seal thereby coordinate with seal valve seat (7) lower end of relief chamber (2) and spool supporting sleeve (5) inwall when spool is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647107 CN203009947U (en) | 2012-11-30 | 2012-11-30 | Novel air filtering and pressure reducing valve for pneumatic instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647107 CN203009947U (en) | 2012-11-30 | 2012-11-30 | Novel air filtering and pressure reducing valve for pneumatic instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009947U true CN203009947U (en) | 2013-06-19 |
Family
ID=48601544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220647107 Expired - Lifetime CN203009947U (en) | 2012-11-30 | 2012-11-30 | Novel air filtering and pressure reducing valve for pneumatic instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203009947U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966773A (en) * | 2012-11-30 | 2013-03-13 | 吴忠仪表有限责任公司 | Balance-type air filtering relief valve |
-
2012
- 2012-11-30 CN CN 201220647107 patent/CN203009947U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966773A (en) * | 2012-11-30 | 2013-03-13 | 吴忠仪表有限责任公司 | Balance-type air filtering relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |
|
| CX01 | Expiry of patent term |