CN219198173U - Normally open type oil cut-off valve - Google Patents
Normally open type oil cut-off valve Download PDFInfo
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- CN219198173U CN219198173U CN202223229565.6U CN202223229565U CN219198173U CN 219198173 U CN219198173 U CN 219198173U CN 202223229565 U CN202223229565 U CN 202223229565U CN 219198173 U CN219198173 U CN 219198173U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model provides a normally open oil-break valve, comprising: the valve body is provided with an inlet end and an outlet end; a valve clack positioned in the valve body; one end of the valve rod is connected with the valve clack, and the valve rod drives the valve clack to move so as to block/open a channel between the inlet end and the outlet end; a piston for providing space for movement of the valve flap; the valve rod, the valve clack and the piston form an integrated structure; and the valve cover is used for covering the valve body, and an air inlet is formed in the valve cover. The utility model keeps a normally open state when the air compressor is not in operation, can automatically adjust the oil supply quantity of the oil-break valve according to the gas pressure in the system, and has the characteristics of quick and flexible closing and opening, good sealing performance, long service life and the like.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a normally open oil-break valve.
Background
The oil-break valve is widely applied to the modern manufacturing engineering technology, particularly the field of air compressors, is a main part on the air compressor, and has the main function on the air compressor that too much oil enters a host machine when the air compressor is started to cause a phenomenon that the air compressor cannot be started. When the air compressor is stopped, the internal air pressure is high, and the oil circuit is timely cut off by the oil cut-off valve, so that lubricating oil is prevented from being sprayed outwards from the air inlet valve.
As the oil-break valve technology is increasingly applied to various industries, the performance of the original traditional oil-break valve is continuously improved, and new products of the oil-break valve which are suitable for market requirements are developed. The currently used fuel cut-off valve often encounters some problems: most of the oil-break valves are normally closed, and are monotonous in type, so that market demands are far from being met.
The search finds that:
the Chinese patent with publication number CN201751640U discloses a pneumatic mechanical oil-breaking valve, which comprises a valve body, a piston rod and a piston, wherein the piston rod and the piston are arranged in a valve cavity of the valve body, one end of the valve cavity is an oil inlet cavity, the other end of the valve cavity is connected with an exhaust port of a compressor, the piston is arranged in one end of the valve cavity, which is close to a pressure air source of the compressor, of the valve cavity, an oil outlet cavity communicated with the oil inlet end of the valve cavity is arranged on the valve body, one end of the piston rod is connected with the piston, and the pneumatic mechanical oil-breaking valve is characterized in that the other end of the piston rod is provided with an annular boss which is provided with a reset spring and is used for isolating an oil inlet cavity and an oil outlet cavity of the valve cavity and is provided with a sealing inclined plane. But this patent still has the following problems: the parts are more, the structure is complex, and the tightness during oil break needs to be further improved.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a normally open oil-break valve.
The utility model is realized by the following technical scheme:
according to one aspect of the present utility model, there is provided a normally open fuel cut-off valve comprising:
the valve body is provided with an inlet end and an outlet end;
a valve clack positioned in the valve body;
one end of the valve rod is connected with the valve clack, and the valve rod drives the valve clack to move so as to block/open a channel between the inlet end and the outlet end;
a piston for providing space for movement of the valve flap; the valve rod, the valve clack and the piston form an integrated structure;
and the valve cover is used for covering the valve body, and an air inlet is formed in the valve cover.
Further, the valve body is of a cast integral structure.
Further, a first O-shaped sealing ring is arranged between the bottom of the piston and the sealing surface of the valve body.
Further, a second O-shaped sealing ring is arranged between the piston and the valve body.
Further, a third O-shaped sealing ring is arranged between the piston and the valve body, and the third O-shaped sealing ring is located above the second O-shaped sealing ring.
Further, a fourth O-shaped sealing ring is arranged between the valve cover and the valve body.
Compared with the prior art, the utility model has at least one of the following beneficial effects:
1. when the air compressor is not in operation, the normally open type oil-break valve can open the channel between the inlet end and the outlet end through the mutual matching among the valve clack, the valve rod and the piston, so that the normally open state of the valve is maintained.
2. When the pressure of the air inlet of the oil-break valve comes in, the normally open oil-break valve can push the piston to close the oil-break valve, and the higher the pressure of the air inlet is, the lower the oil supply quantity is, and conversely, the higher the oil supply quantity is, so that the oil supply quantity of the oil-break valve can be automatically regulated according to the gas pressure in a system of the oil-break valve.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a normally open fuel cut-off valve according to an embodiment of the present utility model.
In the figure: 1 is the valve body, 2 is integrated into one piece structure, 3 is the valve gap, 4 is first O type sealing washer, 5 is second O type sealing washer, 6 is third O type sealing washer, 7 is fourth O type sealing washer.
Detailed Description
The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.
Referring to fig. 1, a schematic structure of a normally open type fuel cut-off valve according to a preferred embodiment of the present utility model includes a valve body 1, a valve flap, a valve rod, a piston, and a valve cover 3, in which an arrow direction indicates a flow direction, wherein: the valve body 1 is provided with an inlet end and an outlet end, wherein the inlet end is IN shown IN figure 1, and the outlet end is OUT shown IN figure 1; the valve clack is positioned in the valve body 1; one end of the valve rod is connected with the valve clack, and the valve rod drives the valve clack to move so as to block/open a channel between the inlet end and the outlet end; the piston is used for providing space for the movement of the valve clack; the valve rod, the valve clack and the piston form an integrated structure 2, so that the guide centering function can be realized, and the faults such as locking and the like are avoided when the valve rod is closed and opened; the valve cover 3 is used for covering the valve body 1, the valve cover 3 is provided with an air inlet, the air inlet is shown as P in figure 1, the air inlet P is the control end of the valve, and the pressure of air entering through the end of the air inlet P controls the movement of the piston until the oil cut-off valve is closed.
According to the normally open type oil-break valve, when the internal pressure exists in the oil-break valve channel, the valve is normally open, and when the air inlet P end is used for air intake, the piston is pushed to touch the sealing surface of the valve body until the valve is closed. When the air compressor is not in operation, the channel between the inlet end and the outlet end can be opened through the mutual coordination among the valve clack, the valve rod and the piston, so that the normally open state of the valve is maintained. In addition, the oil-break valve can automatically control the opening and closing of the oil-break valve according to the gas pressure in the system, so that the normal operation of the system equipment is protected, and the valve is fast and flexible to close and open, good in sealing performance, long in service life and the like, so that the product is safer, more stable and more reliable to use. Compared with the prior art, the oil-break valve in the embodiment of the utility model has simpler structure and fewer parts, and has better tightness when oil is broken because parts such as a piston rod, a spring and the like are omitted.
In some embodiments, the valve body 1 is of a cast integral structure, and is convenient to process, compact, simple and attractive in structure.
In some embodiments, a first O-shaped sealing ring 4 is arranged between the bottom of the piston and the sealing surface of the valve body, so that the valve is rapid and flexible to close and open and has good sealing performance.
In some embodiments, a second O-ring 5 and a third O-ring 6 are arranged between the piston and the valve body 1, the third O-ring 6 is located above the second O-ring 5, and a fourth O-ring 7 is arranged between the valve cover 3 and the valve body 1 to prevent leakage, so that good tightness of the valve can be ensured, and normal operation of equipment is further ensured.
The normal open type oil-break valve in the above embodiment has the following working principle: when the air compressor works, generated compressed gas enters through the P end of the air inlet and pushes the piston to touch the sealing surface of the valve body, so that the oil-break valve is closed, cooling oil in the oil-water separator is cut off from returning to the screw, and lubricating oil with high air pressure and high oil temperature is prevented from being sprayed outwards from the valve. When the air compressor does not work, the oil cut-off valve is in an open state because of no air source, and cooling oil can circularly cool the head screw of the air compressor in the system.
The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the utility model.
Claims (6)
1. A normally open fuel cut-off valve, comprising:
the valve body is provided with an inlet end and an outlet end;
a valve clack positioned in the valve body;
one end of the valve rod is connected with the valve clack, and the valve rod drives the valve clack to move so as to block/open a channel between the inlet end and the outlet end;
a piston for providing space for movement of the valve flap; the valve rod, the valve clack and the piston form an integrated structure;
the valve cover is used for covering the valve body, and an air inlet is formed in the valve cover;
when the air compressor does not work, the channel between the inlet end and the outlet end is opened through the mutual matching among the valve clack, the valve rod and the piston, so that the normally open state of the valve is maintained; the air inlet is a control end of the valve, and the piston is controlled to move through the air inlet pressure of the air inlet until the oil cut-off valve is closed.
2. The normally open fuel shut-off valve of claim 1, wherein the valve body is a cast integral structure.
3. The normally open fuel shut-off valve of claim 1, wherein a first O-ring seal is disposed between the bottom of the piston and the sealing surface of the valve body.
4. The normally open fuel shut-off valve of claim 1, wherein a second O-ring seal is disposed between the piston and the valve body.
5. The normally open fuel shut-off valve of claim 4, wherein a third O-ring is disposed between the piston and the valve body, the third O-ring being located above the second O-ring.
6. The normally open fuel shut-off valve of claim 1, wherein a fourth O-ring seal is disposed between the valve cover and the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223229565.6U CN219198173U (en) | 2022-12-02 | 2022-12-02 | Normally open type oil cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223229565.6U CN219198173U (en) | 2022-12-02 | 2022-12-02 | Normally open type oil cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219198173U true CN219198173U (en) | 2023-06-16 |
Family
ID=86705076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223229565.6U Active CN219198173U (en) | 2022-12-02 | 2022-12-02 | Normally open type oil cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219198173U (en) |
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2022
- 2022-12-02 CN CN202223229565.6U patent/CN219198173U/en active Active
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