CN211422910U - Oil injection medium-pressure gas circuit control system - Google Patents
Oil injection medium-pressure gas circuit control system Download PDFInfo
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- CN211422910U CN211422910U CN202020006959.7U CN202020006959U CN211422910U CN 211422910 U CN211422910 U CN 211422910U CN 202020006959 U CN202020006959 U CN 202020006959U CN 211422910 U CN211422910 U CN 211422910U
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Abstract
The utility model discloses an oil spout middling pressure gas circuit control system relates to oil spout screw rod circulation gas circuit control technical field, include: screw compressor host computer, oil and gas separator, two tee bend normally open solenoid valves, constant voltage atmospheric valve is provided with first control mouth, first entry, first export, oil and gas separator's control gas circuit export respectively with first control mouth with two tee bend normally open solenoid valve's input port intercommunication, two tee bend normally open solenoid valve's delivery outlet with first entry intercommunication, first export with the gas input port intercommunication of screw compressor host computer. Through the utility model discloses an implement, not only can combine pressurize and uninstallation together, still have use small in noise, vibration little, succinct, the reliability is high, stability is good, spare part longe-lived advantage.
Description
Technical Field
The utility model relates to an oil spout screw rod circulation gas circuit control technical field especially relates to an oil spout middling pressure gas circuit control system.
Background
The screw compressor is also called screw compressor, because of its simple structure, the vulnerable part is few, can be under the working condition of the large pressure difference or pressure ratio, the exhaust temperature is low, it is insensitive to the lubricating oil that contains a large amount of in the refrigerant, it has good gas transmission quantity regulation, it has occupied the application range of the large capacity reciprocating compressor very fast, and extend to the medium capacity range continuously, apply to refrigeration plant such as freezing, refrigeration, air conditioner and chemical industry process extensively, with the more and more extensive application of screw compressor, various open-type and semi-closed screw compressors have already formed series, later appear totally closed series screw compressor.
The oil injection medium-pressure gas circuit control system is commonly used for a two-stage medium-pressure and high-pressure screw compressor, a pressure limiting release technology is required, and the high-efficiency pressure limiting release technology is favorable for stable and normal operation of constant internal pressure ratio, reduced bearing load and oil circuit lubrication when the compressor is unloaded, so that the host machine fault is greatly reduced. At present, the market of medium and high pressure screw compressors at home and abroad selects and controls an adding and unloading electromagnetic valve, so that an oil-injection medium-pressure gas path system has the defects of large noise, large vibration, poor safety, poor reliability and short part period.
Therefore, the technical personnel in the field are dedicated to developing an oil injection medium-pressure gas circuit control system, which not only can organically combine pressure maintaining and unloading, but also has the advantages of low noise, small vibration, simplicity, high reliability, good stability and long service life of parts.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model aims to solve the technical problem how combine pressurize and uninstallation organically, overcome that the current adoption adds, the middling pressure gas circuit control system that uninstallation solenoid valve controlled has big, the vibration is big, the security is poor, the reliability is poor, spare part cycle is short not enough.
In order to achieve the above object, the utility model provides an oil spout middling pressure gas circuit control system, include: the system comprises a screw compressor main machine, an oil-gas separator, a two-position three-way normally-open electromagnetic valve and a constant-pressure vent valve, wherein the constant-pressure vent valve is provided with a first control port, a first inlet and a first outlet, and is configured to be communicated with the first outlet when the gas pressure of the first inlet is greater than the gas pressure of the first control port and the unloading pressure configured by the constant-pressure vent valve; the control gas circuit outlet of the oil-gas separator is communicated with the first control port and the input port of the two-position three-way normally-open electromagnetic valve respectively, the output port of the two-position three-way normally-open electromagnetic valve is communicated with the first inlet, and the first outlet is communicated with the gas input port of the main machine of the screw compressor.
Further, the two-position three-way normally-open electromagnetic valve is configured to be powered on when the oil injection medium-pressure gas circuit control system is loaded, and an input port and an output port of the two-position three-way normally-open electromagnetic valve are disconnected; when the pressure of the oil injection medium-pressure gas circuit control system reaches a set pressure, the two-position three-way normally-open electromagnetic valve is de-energized, and the input port and the output port of the two-position three-way normally-open electromagnetic valve are communicated.
Further, the constant pressure vent valve comprises a first valve core, a second valve core and a first middle port, wherein the first valve core is configured to be opened when the gas pressure of the first inlet port is larger than the gas pressure of the first control port, and the first inlet port is communicated with the first middle port; when the gas pressure of the first inlet is not greater than the gas pressure of the first control port, the first valve core is closed, and the first inlet is not communicated with the first middle port; the second spool is configured to open when the gas pressure of the first intermediate port is greater than the unloading pressure of the constant pressure vent valve configuration, the first intermediate port being in communication with the first outlet; when the gas pressure of the first intermediate port is not greater than the unloading pressure configured by the constant-pressure emptying valve, the second valve core is closed, and the first intermediate port is not communicated with the first outlet.
Further, the constant pressure vent valve includes an unloading spring, and the unloading pressure of the constant pressure vent valve is realized by an elastic force of the unloading spring.
The oil cut-off valve is provided with an oil cut-off control port, a first oil inlet and a first oil outlet, and the oil cut-off valve is configured to be communicated with the first oil outlet when pressure oil is input into the oil cut-off control port, or be disconnected from the first oil outlet; the oil cut-off valve is arranged on the system oil return pipeline and controls the on-off of the system oil return pipeline; and an oil-gas mixture outlet of the main machine of the screw compressor is communicated with the oil cut-off control port.
And an oil-gas mixture outlet of the main machine of the screw compressor is communicated with an inlet of the exhaust one-way valve, and an outlet of the exhaust one-way valve is communicated with an inlet of the oil-gas separator.
Further, still include deareator, aftercooler, the gas outlet intercommunication of oil and gas separator the entry of aftercooler, the export intercommunication of aftercooler the entry of deareator, deareator's export is connected with the user point, aftercooler is configured to and carries out gas-water separation to the gas that passes through it, deareator is configured to carry out gas-water separation to the gas that passes through it.
Further, a minimum pressure valve is also included, and the minimum pressure valve is arranged between the gas outlet of the oil-gas separator and the inlet of the after cooler.
The oil-gas separator is characterized by further comprising a normally closed vent valve, wherein an inlet of the normally closed vent valve is communicated with a vent hole of the oil-gas separator, and an outlet of the normally closed vent valve is communicated with a gas input port of the main engine of the screw compressor.
Further, the normally closed blow valve is configured to open when the system air pressure is kept at the upper pressure limit and is not used, so that the discharge port of the oil separator communicates with the gas input port of the screw compressor main body.
Compared with the prior art, through the utility model discloses an implement, reached following obvious technological effect:
1. the utility model organically combines the pressure maintaining and unloading of the gas system, reduces the complexity of the system and improves the reliability and stability of the system;
2. the utility model discloses constitute simple structure, the security is high, spare part longe-lived.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 is a system diagram of a preferred embodiment of the present invention.
Wherein: 1-a screw compressor host, 2-a constant pressure emptying valve, 3-a two-position three-way normally open electromagnetic valve, 4-a normally closed emptying valve, 5-a minimum pressure valve, 6-a post cooler, 7-a gas-water separator, 8-an exhaust one-way valve, 9-an oil cut-off valve and 10-an oil-gas separator.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
In the description of the embodiments of the present application, it should be clear that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the described devices or elements must have specific orientations or positional relationships, i.e., cannot be construed as limiting the embodiments of the present application; furthermore, the terms "first," "second," "third," "fourth," and the like are used merely to facilitate description or to simplify description, and do not indicate or imply importance.
The embodiment discloses an oil injection medium-pressure gas circuit control system, as shown in fig. 1, including: the device comprises a screw compressor main machine 1, an oil-gas separator 10, a two-position three-way normally-open electromagnetic valve 3, a constant-pressure vent valve 2 and a normally-closed vent valve 4, wherein the constant-pressure vent valve 2 is provided with a first control port, a first inlet and a first outlet, and the constant-pressure vent valve 2 is configured to be communicated with the first outlet when the gas pressure of the first inlet is greater than the gas pressure of the first control port and the unloading pressure configured by the constant-pressure vent valve 2; the outlet of a control gas circuit of the oil-gas separator 10 is respectively communicated with a first control port and the input port of the two-position three-way normally-open electromagnetic valve 3, the inlet of the normally-closed vent valve 4 is communicated with the discharge port of the oil-gas separator 10, the output port of the two-position three-way normally-open electromagnetic valve 3 is communicated with the first inlet, the first outlet is communicated with the gas input port of the screw compressor host 1, and the outlet of the normally-closed vent valve 4 is communicated with the gas input port of the screw compressor host 1.
The two-position three-way normally-open electromagnetic valve 3 is configured in such a way that when the oil injection medium-pressure gas circuit control system is loaded, the two-position three-way normally-open electromagnetic valve 3 is electrified, and the input port and the output port of the two-position three-way normally-open electromagnetic valve 3 are disconnected; when the pressure of the oil injection medium-pressure gas circuit control system reaches the set pressure, the two-position three-way normally-open electromagnetic valve 3 is de-energized, and the input port and the output port of the two-position three-way normally-open electromagnetic valve 3 are communicated.
The constant pressure blow-down valve 2 comprises a first valve core, a second valve core, a first middle port and an unloading spring, wherein the first valve core is configured to be opened when the gas pressure of a first inlet is larger than that of a first control port, and the first inlet is communicated with the first middle port; when the gas pressure of the first inlet is not greater than the gas pressure of the first control port, the first valve core is closed, and the first inlet is not communicated with the first middle port; the second spool is configured to open when the gas pressure of the first intermediate port is greater than the unloading pressure of the constant pressure dump valve 2 configuration, the first intermediate port communicating with the first outlet; when the gas pressure of the first intermediate port is not greater than the unloading pressure configured by the constant-pressure emptying valve 2, the second valve core is closed, and the first intermediate port is not communicated with the first outlet; the unloading pressure of the constant pressure atmospheric valve 2 is realized by the elastic force of the unloading spring. The normally closed blow-off valve 4 is configured such that when the system air pressure is kept at the upper pressure limit and is not in use, the normally closed blow-off valve 4 is opened so that the discharge port of the oil separator 10 communicates with the gas input port of the screw compressor main body 1. When a control gas circuit led out from the oil-gas separator 10 is loaded, the two-position three-way normally-open electromagnetic valve 3 is powered off, and the pressure connected with the first control port closes the exhaust passage of the constant-pressure vent valve 2; when system pressure reaches the set pressure, two tee bend normally open solenoid valve 3 loses the electricity and opens, connect two tee bend normally open solenoid valve 3's pipeline to the import of constant voltage atmospheric valve 2, the first case of back-opening, when being greater than the spring force of the uninstallation spring that the second case received, the second case of back-opening, open the passageway of constant voltage atmospheric valve 2, gas outgoing, when pressure is less than the spring force of the uninstallation spring that the second case received, the second case can't be back-opened, the passageway of constant voltage atmospheric valve 2 is closed and is made pressure keep the constant voltage state. When no gas is used for a long time and the gas pressure is kept at the upper pressure limit, the system is unloaded, and the normally closed vent valve 4 opens the gas to be rapidly discharged to the air inlet.
The oil injection medium-pressure gas circuit control system further comprises an oil cut-off valve 9 and an exhaust one-way valve 8, wherein the oil cut-off valve 9 is provided with an oil cut-off control port, a first oil inlet and a first oil outlet, and the oil cut-off valve 9 is configured to be communicated with the first oil outlet when pressure oil is input into the oil cut-off control port, or disconnected with the first oil outlet; the oil cut-off valve 9 is arranged on the system oil return pipeline and controls the on-off of the system oil return pipeline; an oil-gas mixture outlet of the main machine 1 of the screw compressor is communicated with the oil-cut control port, the oil-gas mixture outlet of the main machine 1 of the screw compressor is communicated with an inlet of the exhaust check valve 8, and an outlet of the exhaust check valve 8 is communicated with an inlet of the oil-gas separator 10.
One path of the oil-gas mixture compressed by the screw compressor main machine 1 passes through the oil cut-off valve 9 to jack a passage of a system oil return pipeline, and the other path of the oil-gas mixture enters the oil-gas separator 10 through the exhaust single-phase valve 8 and is separated by the oil-gas separator 10.
The oil injection medium-pressure gas path control system further comprises a gas-water separator 7, a post cooler 6 and a minimum pressure valve 5, a gas outlet of the oil-gas separator 10 is communicated with an inlet of the minimum pressure valve 5, an outlet of the minimum pressure valve 5 is communicated with an inlet of the post cooler 6, an outlet of the post cooler 6 is communicated with an inlet of the gas-water separator 7, an outlet of the gas-water separator 7 is connected with a user point, the post cooler 6 is configured to cool gas passing through the post cooler, and the gas-water separator 7 is configured to perform gas-water separation on the gas passing through the post cooler.
The compressed air separated by the oil-gas separator 10 passes through the minimum pressure valve 5 and the aftercooler 6, and then is separated into water by the gas-water separator 7 for the user to use.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides an oil spout middling pressure gas circuit control system which characterized in that includes: the system comprises a screw compressor main machine, an oil-gas separator, a two-position three-way normally-open electromagnetic valve and a constant-pressure vent valve, wherein the constant-pressure vent valve is provided with a first control port, a first inlet and a first outlet, and is configured to be communicated with the first outlet when the gas pressure of the first inlet is greater than the gas pressure of the first control port and the unloading pressure configured by the constant-pressure vent valve; the control gas circuit outlet of the oil-gas separator is communicated with the first control port and the input port of the two-position three-way normally-open electromagnetic valve respectively, the output port of the two-position three-way normally-open electromagnetic valve is communicated with the first inlet, and the first outlet is communicated with the gas input port of the main machine of the screw compressor.
2. The oil injection and medium pressure gas circuit control system of claim 1, wherein the two-position three-way normally open solenoid valve is configured to be energized when the oil injection and medium pressure gas circuit control system is loaded, and an input port and an output port of the two-position three-way normally open solenoid valve are disconnected; when the pressure of the oil injection medium-pressure gas circuit control system reaches a set pressure, the two-position three-way normally-open electromagnetic valve is de-energized, and the input port and the output port of the two-position three-way normally-open electromagnetic valve are communicated.
3. The oil-injection medium-pressure gas circuit control system according to claim 2, wherein the constant-pressure blow-down valve comprises a first valve spool, a second valve spool and a first intermediate port, the first valve spool is configured to be opened when the gas pressure of the first inlet is greater than the gas pressure of the first control port, and the first inlet is communicated with the first intermediate port; when the gas pressure of the first inlet is not greater than the gas pressure of the first control port, the first valve core is closed, and the first inlet is not communicated with the first middle port; the second spool is configured to open when the gas pressure of the first intermediate port is greater than the unloading pressure of the constant pressure vent valve configuration, the first intermediate port being in communication with the first outlet; when the gas pressure of the first intermediate port is not greater than the unloading pressure configured by the constant-pressure emptying valve, the second valve core is closed, and the first intermediate port is not communicated with the first outlet.
4. The oil injection medium-pressure air passage control system according to claim 3, wherein the constant pressure vent valve includes an unloading spring, and the unloading pressure of the constant pressure vent valve is realized by an elastic force of the unloading spring.
5. The oil-injection medium-pressure gas circuit control system according to claim 4, further comprising an oil cut-off valve, wherein the oil cut-off valve is provided with an oil cut-off control port, a first oil inlet and a first oil outlet, and the oil cut-off valve is configured to communicate the first oil inlet with the first oil outlet when the oil cut-off control port has a pressure oil input, and to disconnect the first oil inlet from the first oil outlet otherwise; the oil cut-off valve is arranged on the system oil return pipeline and controls the on-off of the system oil return pipeline; and an oil-gas mixture outlet of the main machine of the screw compressor is communicated with the oil cut-off control port.
6. The oil-injection medium-pressure gas circuit control system according to claim 5, further comprising an exhaust check valve, wherein an oil-gas mixture outlet of the screw compressor main unit is communicated with an inlet of the exhaust check valve, and an outlet of the exhaust check valve is communicated with an inlet of the oil-gas separator.
7. The oil-injection medium-pressure gas circuit control system according to claim 6, further comprising a gas-water separator and an aftercooler, wherein a gas outlet of the gas-water separator is communicated with an inlet of the aftercooler, an outlet of the aftercooler is communicated with an inlet of the gas-water separator, an outlet of the gas-water separator is connected with a user point, the aftercooler is configured to cool gas passing through the aftercooler, and the gas-water separator is configured to perform gas-water separation on the gas passing through the aftercooler.
8. The oil injection and medium pressure gas circuit control system according to claim 7, further comprising a minimum pressure valve disposed between a gas outlet of the oil separator and an inlet of the after cooler.
9. An oil injection medium-pressure air path control system as claimed in claim 8, further comprising a normally closed air release valve, wherein an inlet of the normally closed air release valve is communicated with a release port of the oil-gas separator, and an outlet of the normally closed air release valve is communicated with a gas input port of the screw compressor main body.
10. The oil-injection medium-pressure gas circuit control system according to claim 9, wherein the normally closed blow-off valve is configured to open when the system gas pressure is kept at an upper pressure limit and is not used, so that the discharge port of the oil-gas separator communicates with the gas input port of the screw compressor main body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020006959.7U CN211422910U (en) | 2020-01-02 | 2020-01-02 | Oil injection medium-pressure gas circuit control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020006959.7U CN211422910U (en) | 2020-01-02 | 2020-01-02 | Oil injection medium-pressure gas circuit control system |
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| CN211422910U true CN211422910U (en) | 2020-09-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738274A (en) * | 2022-03-21 | 2022-07-12 | 陕西飞机工业有限责任公司 | G250 screw air compressor oil gas system |
-
2020
- 2020-01-02 CN CN202020006959.7U patent/CN211422910U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738274A (en) * | 2022-03-21 | 2022-07-12 | 陕西飞机工业有限责任公司 | G250 screw air compressor oil gas system |
| CN114738274B (en) * | 2022-03-21 | 2023-05-23 | 陕西飞机工业有限责任公司 | Oil-gas system of G250 screw air compressor |
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