CN217815305U - Air inlet device for screw compressor - Google Patents
Air inlet device for screw compressor Download PDFInfo
- Publication number
- CN217815305U CN217815305U CN202220579909.7U CN202220579909U CN217815305U CN 217815305 U CN217815305 U CN 217815305U CN 202220579909 U CN202220579909 U CN 202220579909U CN 217815305 U CN217815305 U CN 217815305U
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- valve
- air inlet
- air
- screw compressor
- admission
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Abstract
The utility model discloses an air inlet unit for screw compressor, including the admission line, admission valve and the adaptor flange that connect gradually, the admission valve passes through adaptor flange and is connected to screw compressor's air inlet, the admission valve is the butterfly valve, be provided with the atmospheric pressure balancing hole on the valve plate of admission valve. The utility model takes the butterfly valve as the air inlet valve, the valve plate of the air inlet valve is provided with the pressure balance hole, when the air inlet pressure is larger, the pressure at the two sides of the valve plate is balanced through the balance hole, so that the air inlet valve can be normally opened; the air inlet pipe is provided with an air vent, the air vent is provided with an emptying valve, and the air inlet pipe is emptied of the pressure in the air inlet pipe after the air inlet valve is closed, so that the screw compressor is protected.
Description
Technical Field
The utility model relates to an air inlet unit especially relates to an air inlet unit for screw compressor.
Background
An air inlet device is arranged at an air inlet of the screw compressor for air inlet, and an air inlet valve of the existing air inlet device is a common stop valve; ordinary stop valve can only be used for admitting air under the atmospheric pressure, and when inlet pressure was greater than atmospheric pressure 1bar and more than 1bar, because the pressure differential of valve both sides is too big, ordinary stop valve can't normally open, may lead to the valve plate to break even, influences screw compressor's the admit air. The prior art therefore remains to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a problem that is used for helical-lobe compressor's air inlet unit is solved current air inlet unit and the valve can't normally be opened when inlet pressure is big is provided.
The utility model discloses a solve above-mentioned technical problem and the technical scheme who adopts provides an air inlet unit for screw compressor, including the admission line, admission valve and the adaptor flange that connect gradually, the admission valve passes through adaptor flange and is connected to screw compressor's air inlet, the admission valve is the butterfly valve, be provided with the atmospheric pressure balancing hole on the valve plate of admission valve.
Further, an air release hole is formed in the air inlet pipeline, an air release electromagnetic valve is arranged at the air release hole, and the air release electromagnetic valve is a two-position two-way electromagnetic valve.
Furthermore, the number of the air pressure balance holes is two, and the two air pressure balance holes are symmetrically arranged on two sides of the valve plate.
Further, the atmospheric pressure balancing hole is located the both sides center of valve plate, the aperture of atmospheric pressure balancing hole is 8mm.
Further, the valve plate is controlled by the valve rod to rotate along the axis, and the rotation angle of the valve plate is 90 degrees +/-4 degrees.
Further, the admission valve is for opening and closing the executive valve of two effects, the admission valve includes pneumatic actuator, pneumatic actuator is connected with control solenoid valve, control solenoid valve is two-position five-way solenoid valve.
The utility model discloses contrast prior art has following beneficial effect: the utility model provides an air inlet device for screw compressor, which takes the butterfly valve as the air inlet valve, and the valve plate of the air inlet valve is provided with the pressure balance hole, when the air inlet pressure is larger, the pressure at the two sides of the valve plate is balanced through the balance hole, so that the air inlet valve can be normally opened; the air inlet pipeline is provided with an air vent, the air vent is provided with an emptying valve, and the air vent is matched with the air inlet valve to empty the pressure in the air inlet pipeline after the air inlet valve is closed, so that the screw compressor is protected.
Drawings
Fig. 1 is a schematic structural view of an air inlet device for a screw compressor according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an intake valve according to an embodiment of the present invention.
In the figure:
1. an air intake duct; 2. an air bleed solenoid valve; 3. an intake valve; 4. a transfer flange; 5. a screw compressor; 6. air bleeding holes; 31. a pneumatic actuator; 32. a valve plate; 33. and air pressure balancing holes.
Detailed Description
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic structural view of an air inlet device for a screw compressor according to an embodiment of the present invention; fig. 2 is a schematic structural view of an intake valve according to an embodiment of the present invention.
Referring to fig. 1 and 2, the air inlet device for the screw compressor according to the embodiment of the present invention includes an air inlet pipeline 1, an air inlet valve 3 and an adapter flange 4 connected in sequence, the air inlet valve 3 is connected to an air inlet of the screw compressor 5 through the adapter flange 4, the air inlet valve 3 is a butterfly valve, and an air pressure balancing hole 33 is provided on a valve plate 32 of the air inlet valve 3.
Specifically, an air bleed hole 6 is formed in the air inlet pipeline 1, an air bleed solenoid valve 2 is arranged at the air bleed hole 6, and the air bleed solenoid valve 2 is a two-position two-way solenoid valve.
Please continue to refer to fig. 2, in the air inlet device for the screw compressor according to the embodiment of the present invention, two air pressure balance holes 33 are provided, and the two air pressure balance holes 33 are symmetrically disposed on two sides of the axis of the valve plate 32. Preferably, the air pressure balance hole 33 is located at the center of both sides of the valve plate 32, and the aperture of the air pressure balance hole 33 is 8mm.
Specifically, the valve plate 32 is controlled by the valve stem to rotate along the axis, and the rotation angle of the valve plate 32 is 90 ° ± 4 °. The air inlet valve 3 is an execution valve with double functions of opening and closing, the air inlet valve 3 comprises a pneumatic actuator 31, the pneumatic actuator 31 is connected with a control electromagnetic valve, and the control electromagnetic valve is a two-position five-way electromagnetic valve.
The utility model discloses an air inlet unit for screw compressor, when the in-service use, during the start-up, open screw compressor 5, admission valve 3 closes this moment, only admits air through atmospheric pressure balance hole 33, and screw compressor 5 begins the loading, and gassing solenoid valve 2 closes this moment, and compressor loading 25 seconds, screw compressor 5 pressure reach 3bar, and 3 valve plate both sides pressure balance of admission valve open admission valve 3 this moment, reach the maximum air input. When the screw compressor 5 stops, the air inlet valve 3 is closed at the same time, the air inlet device enters a delay state, and air is supplied through the air pressure balancing hole 33, so that negative pressure in the screw compressor 5 is avoided; the air intake valve 3 is closed, the air release solenoid valve 2 is opened, the air pressure in the screw compressor 5 is reduced to 0.4MPa or less through the air release solenoid valve 2 and the air pressure balance hole 33, the oil cut valve of the screw compressor 5 is closed, the oil supply system supplies only lubricating oil necessary for maintaining the operation of the screw compressor 5, and once the machine is stopped, the pressure in the screw compressor 5 is rapidly reduced to 0.
To sum up, the air inlet device for the screw compressor of the embodiment of the present invention uses the butterfly valve as the air inlet valve 3, the valve plate 32 of the air inlet valve 3 is provided with the air pressure balancing hole 33, and when the air inlet pressure is relatively high, the pressure at two sides of the valve plate 32 is balanced by the air pressure balancing hole 33, so that the air inlet valve 3 can be normally opened; an air vent 6 is arranged on the air inlet pipeline, an air release valve is arranged at the air vent 6, and the air vent valve is matched with the air inlet valve 3 to release the pressure in the air inlet pipeline after closing so as to protect the screw compressor 5.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides an air inlet unit for helical-lobe compressor, its characterized in that, is including the admission line, admission valve and the adaptor flange that connect gradually, the admission valve passes through adaptor flange and is connected to helical-lobe compressor's air inlet, the admission valve is the butterfly valve, be provided with the atmospheric pressure balancing hole on the valve plate of admission valve.
2. The air intake apparatus for the screw compressor according to claim 1, wherein the air intake duct is provided with an air bleed hole, and the air bleed hole is provided with an air bleed solenoid valve, and the air bleed solenoid valve is a two-position two-way solenoid valve.
3. The air intake apparatus for the screw compressor according to claim 1, wherein the air pressure balance holes are two, and the two air pressure balance holes are symmetrically disposed at both sides of the valve plate.
4. The air intake apparatus for the screw compressor according to claim 1, wherein the air pressure balance hole is centrally located at both sides of the valve plate, and the aperture of the air pressure balance hole is 8mm.
5. The intake apparatus for a screw compressor according to claim 1, wherein the valve plate is rotated along the axis by a valve stem, and the valve plate is rotated by an angle of 90 ° ± 4 °.
6. The air intake apparatus for the screw compressor according to claim 1, wherein the air intake valve is an actuator valve which opens and closes double-acting, the air intake valve includes a pneumatic actuator, a control solenoid valve is connected to the pneumatic actuator, and the control solenoid valve is a two-position five-way solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220579909.7U CN217815305U (en) | 2022-03-16 | 2022-03-16 | Air inlet device for screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220579909.7U CN217815305U (en) | 2022-03-16 | 2022-03-16 | Air inlet device for screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217815305U true CN217815305U (en) | 2022-11-15 |
Family
ID=83980633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220579909.7U Active CN217815305U (en) | 2022-03-16 | 2022-03-16 | Air inlet device for screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217815305U (en) |
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2022
- 2022-03-16 CN CN202220579909.7U patent/CN217815305U/en active Active
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