CN205370987U - Minimum pressure valve - Google Patents
Minimum pressure valve Download PDFInfo
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- CN205370987U CN205370987U CN201620037147.2U CN201620037147U CN205370987U CN 205370987 U CN205370987 U CN 205370987U CN 201620037147 U CN201620037147 U CN 201620037147U CN 205370987 U CN205370987 U CN 205370987U
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- piston
- minimum pressure
- compressed air
- valve body
- pressure valve
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Abstract
The utility model discloses a minimum pressure valve, it includes valve body, end cover, case, piston and pressurize spring, be equipped with air inlet and gas outlet on the valve body, valve body and end cover fixed connection, the case sets up in the valve body, the piston sets up in the end cover, the pressurize spring set up in between case and the piston, the piston with the end cover is formed with the compressed air chamber, the intercommunication has been seted up on the end cover the compressed air entry in compressed air chamber. The utility model discloses a minimum pressure valve, the suitability is good, and the adjusting range is big, has prolonged air compressor's life, has improved air compressor's work efficiency.
Description
Technical field
This utility model relates to a kind of screw air compressor accessory, particularly to a kind of minimum pressure valve.
Background technology
On most of screw air compressors, the effect of minimum pressure valve is that the minimum pressure maintaining air accumulator is more than a threshold value, to maintain the normal operation of cooling oil path blood circulation, it is ensured that the injection pressure at screw rod head place can meet the demand of screw rod head cooling.
Existing minimum pressure valve generally all only has single unlatching pressure set points, minimum pressure valve as disclosed in Chinese patent literature CN202441605U, therefore under normal conditions, the setting value of minimum pressure valve can be higher, this working pressure range allowing for compressor is limited, and can bring some other shortcoming to compressor:
One Energy Consumption Economy when being work under minimal pressure is poor；
Two is use compression air driven pneumatic type drill hole of drilling machine, and at the initial period of boring, higher compressed air pressure can destroy hole wall；
Three is use compression air driven pneumatic type drill hole of drilling machine, and the new drill bit changed needs relatively low compressed air pressure to carry out break-in.
Utility model content
For solving the problems referred to above, this utility model provides a kind of minimum pressure valve, it may be achieved different unlatching pressure settings, expands the working pressure range of air compressor.
For achieving the above object, minimum pressure valve of the present utility model, including valve body, end cap, spool, piston and pressurize spring, described valve body is provided with the fixing connection of air inlet and gas outlet, described valve body and end cap, and described spool is arranged in described valve body, described piston is arranged in described end cap, described pressurize spring is arranged between described spool and piston, and described piston and described end cap are formed with compressed air cell, and described end cap offers the compressed air inlet connecting described compressed air cell.
Preferably, it is provided with O-ring seals between described piston and described end cap.
Preferably, described compressed air inlet is provided with electromagnetic valve.
Minimum pressure valve of the present utility model, can introduce pressurized air into internal to pressurize spring offer pretightning force, and what make minimum pressure valve has different unlatching pressure set points.Minimum pressure valve of the present utility model, the suitability is good, and adjusting range is big, extends the service life of air compressor, improves the work efficiency of air compressor.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present utility model will be apparent.It is to be appreciated that these accompanying drawings are only illustrative, not drawn on scale is also not intended to limit scope of the present utility model.In figure:
Fig. 1 is the structural representation of minimum pressure valve of the present utility model；
Fig. 2 is the schematic diagram of an application example of minimum pressure valve of the present utility model.
Detailed description of the invention
Explain detailed description of the invention of the present utility model with reference to the accompanying drawings.
As shown in Figure 1, minimum pressure valve 100 of the present utility model includes valve body 10, end cap 20, spool 30, piston 40 and pressurize spring 50, described valve body 10 is provided with air inlet 11 and gas outlet 12, described valve body 10 and the fixing containing cavity connected and be formed with accommodating described spool 30, piston 40 and pressurize spring 50 of end cap 20, a part for containing cavity is in valve body 10, another part is arranged in end cap 20, described spool 30 and piston 40 can move in described containing cavity, arrange sealing ring and seal between described valve body 10 and end cap 20.
Described spool 30 is arranged in described valve body 10, described piston 40 is arranged in described end cap 20, described pressurize spring 50 is arranged between described spool 30 and piston 40, described piston 40 is formed with compressed air cell 24 with described end cap 20, and described end cap 20 offers the compressed air inlet 21 connecting described compressed air cell 24.
When described spool 30 is mobile in described valve body 10, the path between described air inlet 11 and gas outlet 12 can be switched on or off.
It is provided with O-ring seals 41 between described piston 40 and described end cap 20, the spatial separation between compressed air cell 24 and described spool 30 and piston is opened, it is prevented that compressed air leakage.
Compared with tradition minimum pressure valve, minimum pressure valve 100 of the present utility model is additionally arranged piston 40, thus can be introduced from outside into compression air in compressed air cell 24, compression air remakes to be used on piston 40, and then piston 40 compresses pressurize spring 50, produce extra pretightning force, thus changing minimum pressure valve to set unlatching pressure.Compression air according to input different pressures, it is possible to pressurize spring 50 is applied different pretightning forces, such that it is able to change the unlatching pressure set points of minimum pressure valve 100, to meet the different situation opening pressure set points of different operating occasion needs.
Compressed air inlet 21 is connected with external compression air source of the gas and introduces compression air, the compression air introduced can be controlled by the electromagnetic valve of an outside, electromagnetic valve may be installed described compressed air inlet place, if unlatching pressure needs relatively low, electromagnetic valve cuts off external air source, if need higher unlatching pressure, electromagnetic valve is connected external air source and is inputted compression air in compressed air cell 24, this just makes minimum pressure valve can open under two kinds of setting pressures of height, thus solving the defect of above-mentioned traditional minimum pressure valve.
The compression air introduced just comes can from the air accumulator of air compressor, it is not necessary to additional energy source.It is of course also possible to adopt other source of the gas supplies compression air.
Fig. 2 is the schematic diagram of an application example of minimum pressure valve of the present utility model, as shown in the figure, minimum pressure valve 100 is arranged on the gas outlet of air accumulator 1, namely the air inlet 11 of minimum pressure valve 100 is connected with the gas outlet of air accumulator 1, minimum pressure valve 100 is mounted with an electromagnetic valve 2 at compressed air inlet 21 place of end cap 20, being used for controlling being turned on and off of compressed air inlet 21, electromagnetic valve 2 is connected with air accumulator 1 by a conduit 3.
When air compressor runs, opening pressure set-point as needed minimum pressure valve 100 to be operated in " height ", then can control electromagnetic valve 2 and open, part compression air introduces compressed air cell 24 from air accumulator 1；Open pressure set-point as needed minimum pressure valve 100 to be operated in " low ", then can control electromagnetic valve 2 and close, now do not compress air and introduce compressed air cell 24.So, by control compression air whether introduce can realize two kinds open pressure settings.
As it has been described above, exemplary embodiments of the present utility model has been described in detail with reference to accompanying drawing.It is to be appreciated that this utility model is not intended to the restriction making these details constitute this utility model protection domain.When without departing substantially from, according to spirit and scope of the present utility model, the structure and features of exemplary embodiments carrying out equivalent or similar change, these changes will also drop in the determined protection domain of this utility model appending claims.
Claims (3)
1. a minimum pressure valve, including valve body, end cap, spool and pressurize spring, described valve body is provided with the fixing connection of air inlet and gas outlet, described valve body and end cap, and described spool is arranged in described valve body, it is characterized in that, also including piston, described piston is arranged in described end cap, and described pressurize spring is arranged between described spool and piston, described piston and described end cap are formed with compressed air cell, and described end cap offers the compressed air inlet connecting described compressed air cell.
2. minimum pressure valve as claimed in claim 1, it is characterised in that be provided with O-ring seals between described piston and described end cap.
3. minimum pressure valve as claimed in claim 1, it is characterised in that described compressed air inlet is provided with electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037147.2U CN205370987U (en) | 2016-01-14 | 2016-01-14 | Minimum pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037147.2U CN205370987U (en) | 2016-01-14 | 2016-01-14 | Minimum pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205370987U true CN205370987U (en) | 2016-07-06 |
Family
ID=56277002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620037147.2U Active CN205370987U (en) | 2016-01-14 | 2016-01-14 | Minimum pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205370987U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779885A (en) * | 2019-03-14 | 2019-05-21 | 广州广涡精密科技有限公司 | A kind of air compressor minimum pressure valve |
| CN110307161A (en) * | 2018-03-27 | 2019-10-08 | 阿特拉斯·科普柯空气动力股份有限公司 | Improved minimum pressure valve and method for safeguarding such valve |
| TWI680233B (en) * | 2017-07-07 | 2019-12-21 | 比利時商亞特拉斯可波克氣動股份有限公司 | A minimum pressure valve, a compressor comprising such a minimum pressure valve and a method for regulating pressure in the pressure vessel of the compressor |
-
2016
- 2016-01-14 CN CN201620037147.2U patent/CN205370987U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI680233B (en) * | 2017-07-07 | 2019-12-21 | 比利時商亞特拉斯可波克氣動股份有限公司 | A minimum pressure valve, a compressor comprising such a minimum pressure valve and a method for regulating pressure in the pressure vessel of the compressor |
| CN110307161A (en) * | 2018-03-27 | 2019-10-08 | 阿特拉斯·科普柯空气动力股份有限公司 | Improved minimum pressure valve and method for safeguarding such valve |
| CN110307161B (en) * | 2018-03-27 | 2021-11-16 | 阿特拉斯·科普柯空气动力股份有限公司 | Improved minimum pressure valve and method for servicing such a valve |
| CN109779885A (en) * | 2019-03-14 | 2019-05-21 | 广州广涡精密科技有限公司 | A kind of air compressor minimum pressure valve |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |