CN109798444B - Safety device for gas maintenance - Google Patents
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- CN109798444B CN109798444B CN201910199420.XA CN201910199420A CN109798444B CN 109798444 B CN109798444 B CN 109798444B CN 201910199420 A CN201910199420 A CN 201910199420A CN 109798444 B CN109798444 B CN 109798444B
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Abstract
The invention relates to a safety device for gas maintenance, comprising: the device comprises an input port, an output port, a humidity monitoring unit, a gas-water separation unit, an air inlet valve and a discharge valve, wherein the input port is used for connecting an air source, the output port is used for connecting maintenance equipment, the humidity monitoring unit, the gas-water separation unit and the air inlet valve are sequentially connected in series between the input port and the output port, and the discharge valve is arranged at the bottom; the humidity monitoring unit is used for monitoring the gas humidity of the gas source gas; when the gas humidity meets a first preset value, the air inlet valve is opened, the discharge valve is closed, and the gas of the gas source sequentially passes through the input port, the humidity monitoring unit, the gas-water separation unit and the air inlet valve and then enters the maintained equipment through the output port. The invention can prevent moisture and water, prevent water from entering the maintained equipment, and automatically turn off the air inlet valve when the humidity of the air source is higher than a set value, thereby preventing the maintained equipment from being affected with damp.
Description
Technical Field
The invention relates to the technical field of gas maintenance, in particular to a safety device for gas maintenance.
Background
In the industrial field, when the equipment stops operating, the moisture-proof maintenance is needed, and the problems of rusting, insulation, moisture and the like are avoided. One widely used method is to introduce dry compressed air into the equipment to maintain the equipment at a slight positive pressure, thereby preventing the intrusion of external moisture and achieving a good drying and maintenance effect. Typically, this dry compressed air is passed into the apparatus continuously for 24 hours. The dry air source generally comprises parts such as air compressor machine, dehumidifier, and the process of compressing the air can lead to air humidity to increase even moisture appears, just is got rid of moisture by the dehumidifier. If the air supply equipment fails, for example, the dehumidifier does not work, the supplied air may have excessive humidity and even moisture. Such high humidity even moisture mixed gas entering the equipment will wet the equipment and even damage the equipment being maintained. Unfortunately, because the air supply is continuously input for 24 hours, when the person finds an abnormality, the equipment may have entered a large amount of moisture or water by maintenance.
Disclosure of Invention
The present invention is directed to a safety device for gas maintenance, which overcomes the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a safety device for gas maintenance comprising: the device comprises an input port, an output port, a humidity monitoring unit, a gas-water separation unit, an air inlet valve and a discharge valve, wherein the input port is used for being connected with an air source, the output port is used for being connected with maintenance equipment, the humidity monitoring unit, the gas-water separation unit and the air inlet valve are sequentially connected in series between the input port and the output port, and the discharge valve is arranged at the;
the humidity monitoring unit is used for monitoring the gas humidity of the gas source gas;
when the gas humidity meets a first preset value, the air inlet valve is opened, the exhaust valve is closed, and the gas of the gas source sequentially passes through the input port, the humidity monitoring unit, the gas-water separation unit and the air inlet valve and then enters the maintained equipment through the output port; and when the gas humidity exceeds the first preset value, the air inlet valve is closed, and the exhaust valve is opened.
Preferably, the safety device for gas maintenance of the invention further comprises a pressure monitoring unit arranged between the gas inlet valve and the output port and/or a liquid detection unit arranged at the bottom of the gas-water separation unit;
the pressure monitoring unit is used for monitoring the pressure of gas entering the output port, and when the pressure of the gas exceeds a second preset value, the air inlet valve is closed, and the exhaust valve is opened;
the liquid detection unit is used for monitoring moisture in the gas-water separation unit, and when the moisture is detected, the air inlet valve is closed, and the drain valve is opened.
Preferably, the humidity monitoring unit comprises a dew point meter, the pressure monitoring unit comprises a pressure sensor, and the liquid detection unit comprises a liquid level switch.
Preferably, a safety device for gas maintenance of the present invention further comprises a power circuit for connecting an external power source, the power circuit comprising a first relay and a first switch;
a coil of the first relay is connected in series with the first switch, a first contact of the first relay is connected in parallel with the first switch,
the second contact of the first relay connects the external power source and the discharge valve and the intake valve.
Preferably, the power supply circuit further includes a second relay;
and a coil of the second relay is connected with the dew point instrument in series and then is connected with the external power supply, and a contact of the second relay is connected with the first switch in series.
Preferably, the power supply circuit further includes a third relay;
a coil of the third relay is connected with the external power supply after being connected with the pressure sensor in series, a first contact of the third relay is connected with the pressure sensor in parallel, and a second contact of the third relay is connected with the first switch in series; and/or
The power circuit further comprises a fourth relay;
the coil of the fourth relay with after the liquid level switch series connection with be connected external power source, the first contact of fourth relay with liquid level switch parallel connection, the second contact of fourth relay with first switch series connection.
Preferably, the power supply circuit further comprises a second switch connected in series with the pressure sensor, and/or a third switch connected in series with the level switch.
Preferably, the power supply circuit further comprises a first indicator light connected in series with the first switch, and/or a second indicator light connected in series with the dew point meter; and/or a third indicator light connected in series with the pressure sensor, and/or a fourth indicator light connected in series with the level switch.
Preferably, the power supply circuit further comprises a fourth switch connected in series with the first switch.
Preferably, a safety device for gas maintenance of the present invention further comprises a safety valve and/or a strainer disposed between the pressure monitoring unit and the output port.
Preferably, the intake valve comprises a first intake valve and a second intake valve in series with each other; and/or the gas-water separation unit comprises a stainless steel gas-water separation tank, a first guide pipe connected with the humidity monitoring unit and a second guide pipe connected with the air inlet valve, wherein the depth of the first guide pipe is greater than that of the second guide pipe.
The safety device for gas maintenance has the following beneficial effects: can dampproofing and waterproof, avoid moisture to get into by maintenance equipment, when the gaseous humidity of air supply is higher than the setting value, auto-shutoff admission valve prevents to be dampened by maintenance equipment simultaneously.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of a first embodiment of a safety device for gas maintenance of the present invention;
fig. 2 is a schematic circuit diagram of a first embodiment of a safety device for gas maintenance of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a safety device for gas maintenance of the present invention, comprises: the device comprises an input port 11 for connecting an air source, an output port 18 for connecting maintenance equipment, a humidity monitoring unit, a gas-water separation unit and an air inlet valve which are sequentially connected in series between the input port 11 and the output port 18, and a discharge valve 133 arranged at the bottom of the gas-water separation unit; the humidity monitoring unit is used for monitoring the gas humidity of the gas source gas; when the gas humidity meets a first preset value, the air inlet valve is opened, the discharge valve 133 is closed, and the gas of the gas source sequentially passes through the input port 11, the humidity monitoring unit, the gas-water separation unit and the air inlet valve and then enters the maintained equipment through the output port 18; and when the gas humidity exceeds the first preset value, the intake valve is closed and the exhaust valve 133 is opened. Specifically, when the gas source enters the gas-water separation unit through the input port 11, the gas humidity of the gas source can be monitored through the humidity monitoring unit between the gas-water separation unit and the gas-water separation unit, the monitoring unit monitors that the humidity is qualified, the discharge valve 133 is closed, the air inlet valve is opened, the qualified gas source enters the maintenance equipment through the air inlet valve and the output port 18, and the maintenance equipment is maintained. And in the gaseous input process of air supply, when the gas humidity exceeds the default, when unsatisfying the requirement, the admission valve is disconnected, opens discharge valve 133, avoids high humidity gas to get into by the maintenance equipment and cause equipment damage. It will also be appreciated that the outlets 18 may be implemented as three or more quick-connect fittings, allowing for the supply of air to a plurality of devices. It will generally be appreciated that in normal circumstances, before the source gas enters the gas-water separation unit, the gas will also be vented through the vent valve 133 due to the presence of residual air in the plant whose humidity is not satisfactory. Meanwhile, the gas-water separation device ensures that under the condition that the air source has water, the water is firstly isolated by the gas-water separation device, and the breeding water enters the maintained equipment.
Further, a safety device for gas maintenance of the present invention further includes, in one embodiment, a pressure monitoring unit disposed between the gas inlet valve and the output port 18, and in another embodiment, a liquid detection unit disposed at the bottom of the gas-water separation unit; the pressure monitoring unit is used for monitoring the pressure of the gas entering the output port, and when the pressure of the gas exceeds a second preset value, the gas inlet valve is closed, and the discharge valve 133 is opened; the liquid detection unit is used for monitoring moisture in the gas-water separation unit, and when the moisture is detected, the air inlet valve is closed and the discharge valve 133 is opened. Specifically, a pressure monitoring unit, which may be disposed between the inlet valve and the output port 18, monitors the gas pressure at the output port 18, and when the gas pressure exceeds a first predetermined value, e.g., greater than 3ba, the inlet valve is closed, the discharge valve 133 is opened, and the source gas is discharged through the discharge valve 133. The water content of the gas source gas separated by the gas-water separation unit can be monitored by the liquid detection unit arranged at the bottom of the gas-water separation unit, when the water content is monitored to be separated, the gas inlet valve is closed, the discharge valve 133 is opened, and the gas source gas is discharged through the discharge valve 133. It is also understood herein that the moisture separated in the gas-water separation unit 13 may be discharged through the discharge valve 133. Typically, the discharge valve 133 may be connected to a dedicated trench 134 for the discharge of moisture or undesirable gases.
Further, the humidity monitoring unit comprises a dew point meter 12, the pressure monitoring unit comprises a pressure sensor 15, and the liquid detection unit comprises a liquid level switch 132. Specifically, the humidity monitoring unit may include a humidity meter and a dew point meter 12, the pressure monitoring unit commonly employs a pressure sensor 15, and the liquid detecting unit may also be a liquid level switch 132, although the humidity monitoring unit, the pressure monitoring unit and the liquid detecting unit are not limited to the above examples. In practical applications, the liquid level switch 132 may be protected by a protective cover 131.
Further, as shown in fig. 2, a safety device for gas maintenance of the present invention further includes a power circuit for connecting an external power source, the power circuit including a first relay and a first switch 25; the coil 21a of the first relay is connected in series with the first switch 25, the first contact 21b of the first relay is connected in parallel with the first switch 25, and the second contact 21c of the first relay is connected to the external power source and the exhaust valve 133 and the intake valve. Specifically, the first switch 25 is a start switch for starting the operation of the safety device, and is closed by default, the discharge valve 133 is a normally open valve, and is opened by default in the non-energized state, and the intake valve is a normally closed cold valve, and is closed by default in the non-energized state. Therefore, the safety of the whole safety device when power is lost can be ensured. When the first switch 25 is triggered, the coil 21a of the first relay is electrified, the first contact 21b of the first relay connected with the first switch 25 in parallel is switched to a closed state from a normally open state, at this time, the first switch 25 is continuously triggered or not, the coil 21a of the first relay is in a continuous electrified state, the second contact 21c of the first relay is switched to a closed state from the normally open state, the discharge valve 133 and the air inlet valve are both electrified, the discharge valve 133 is switched to a closed state from the normally open state, the air inlet valve is switched to an open state from the normally closed state, at this time, the air source gas can enter the maintenance equipment through the air inlet valve to perform equipment maintenance.
Further, the power supply circuit further comprises a second relay; the coil 22a of the second relay is connected in series with the dew-point meter 12 and then connected to an external power source, and the contact of the second relay is connected in series with the first switch 25. Specifically, the contact of the second relay is in a normally closed state, and when the humidity of the air source gas meets the requirement, the coil 21a of the first relay is always electrified. When the dew point meter 12 monitors that the humidity of the gas exceeds a first preset value, for example, exceeds-5 degrees, the dew point meter 12 is closed and conducted, at this time, the coil 22a of the second relay connected in series with the dew point meter 12 is energized, the contact 22b of the second relay is switched to the open state, at this time, the coil 21a of the first relay is de-energized, the second contact 21c of the first relay is restored to the open state, the exhaust valve 133 and the intake valve are restored to the default state, that is, the exhaust valve 133 is opened, the intake valve is closed, and the gas source gas which does not meet the requirement is exhausted through the exhaust valve 133.
Further, in an embodiment, the power circuit further includes a third relay; a coil 23a of the third relay is connected with the pressure sensor 15 in series and then connected with an external power supply, a first contact 23b of the third relay is connected with the pressure sensor 15 in parallel, and a second contact 23c of the third relay is connected with the first switch 25 in series; in another embodiment, the power circuit further comprises a fourth relay; the coil 24a of the fourth relay is connected with the liquid level switch 132 in series and then connected with an external power supply, the first contact 24b of the fourth relay is connected with the liquid level switch 132 in parallel, and the second contact 24c of the fourth relay is connected with the first switch 25 in series. Specifically, in the process that normal gas source gas enters the maintained equipment, the pressure sensor 15 is in a normal off state, at this time, the coil 23a of the third relay is in a power-off state, the second contact 23c of the third relay is in a normally-closed state, which is negligible when the first switch 25 is normally actuated, when the source gas is delivered to the equipment to be serviced, when the pressure sensor 15 detects that the gas pressure output by the air inlet valve exceeds a second preset value, the pressure sensor 15 is closed, at the moment, the coil 23a of the third relay is electrified, the second contact 23c of the third relay is switched from a normally closed state to an open state, the coil 21a of the first relay is electrified, the second contact 21c of the first relay is recovered to the open state, the exhaust valve 133 and the air inlet valve are recovered to a default state, that is, the bleed valve 133 is open and the intake valve is closed and the source gas that is not satisfactory will be vented through the bleed valve 133. Similarly, during the normal process of the gas source entering the equipment to be maintained, the liquid level switch 132 is in the off state, at this time, the coil 24a of the fourth relay is in the power-off state, the second contact 24c of the fourth relay is in the normally-closed state, which is negligible when the first switch 25 is normally actuated, when the source gas is delivered to the equipment to be serviced, when the liquid level switch 132 detects that moisture exists in the gas-water separation unit 13, the liquid level switch 132 is closed, at this time, the coil 24a of the fourth relay is electrified, the second contact 24c of the fourth relay is switched from the normally closed state to the open state, the coil 21a of the first relay is electrified, the second contact 21c of the first relay is restored to the open state, the drain valve 133 and the air inlet valve are restored to the default state, that is, the bleed valve 133 is open and the intake valve is closed and the source gas that is not satisfactory will be vented through the bleed valve 133. Furthermore, it is understood that all the relays described above may be electromagnetic relays.
Further, in one embodiment, the power circuit further includes a second switch connected in series with the pressure sensor 15, and in another embodiment, the power circuit includes a third switch connected in series with the level switch 132. Specifically, in a normal situation, the second switch is a normally closed switch, and on the basis of the foregoing, when the gas pressure of the gas source detected by the pressure sensor 15 exceeds a second preset value, the discharge valve 133 and the gas inlet valve are always kept in a default state, and after the fault is cleared after manual confirmation, the second switch is turned off, and the coil 23a of the third relay is de-energized, so that the first contact 23b and the second contact of the third relay are restored to an initial state, and the normal operation after the fault is cleared is performed. Similarly, the third switch is a normally closed switch, and on the basis of the above, after the liquid level switch 132 detects moisture, the drain valve 133 and the air intake valve are always kept in a default state, and after the fault is cleared after manual confirmation, the third switch is turned off, and the coil 24a of the fourth relay loses power, so that the first contact 24b and the second contact 24c of the fourth relay are restored to the initial state, and normal operation after the fault is cleared is performed. It will be further understood that the second switch and the third switch may be provided separately, or the same switch, i.e., the switch 27, may be provided at the branch end of the pressure sensor 15 and the branch end of the liquid level switch 132.
Further, the power supply circuit further includes a first indicator light 281 connected in series with the first switch 25, a second indicator light 282 connected in series with the dew-point meter 12; a third indicator light 283 connected in series with the pressure sensor 15 and a fourth indicator light 284 connected in series with the level switch 132. Specifically, after the first switch 25 is triggered to be turned on, the first indicator light 281 is turned on, that is, it can be understood that, when the gas source gas is normal, the first indicator light 281 is kept on during normal maintenance of the equipment. Normally, since the dew point meter 12 is in an off state and the second indicator lamp 282 is in an off state, when the dew point meter 12 detects that the humidity of the source gas is in an off state, the second indicator lamp 282 is turned on, so that the current humidity of the source gas can be determined by the second indicator lamp 282. Similarly, under the normal condition, because pressure sensor 15 is the off-state, third pilot lamp 283 is the state of extinguishing, when pressure sensor 15 detects that air supply gas pressure exceeds standard, third pilot lamp 283 is lighted, can judge current air supply gas pressure through third pilot lamp 283 from this. In addition, under normal conditions, since the liquid level switch 132 is in the off state, and the fourth indicator 284 is in the off state, when the liquid level switch 132 detects that the gas source gas pressure exceeds the standard, the fourth indicator 284 is turned on, so that the current moisture in the gas source gas can be determined through the fourth indicator 283. It is understood herein that the first indicator light 281, the second indicator light 282, the third indicator light 283 and the fourth indicator light 284 may be configured in any one or more combinations.
Further, the power circuit further includes a fourth switch 26, and the fourth switch 26 is connected in series with the first switch 25. Specifically, a fourth switch 26 connected in series with the first switch 25 may be further provided, the fourth switch 26 is a normally closed switch, and when the whole installation device needs to be restarted, the fourth switch 26 may be ignored, so that the coil 21a of the first relay is powered off and the circuit in the whole installation device recovers to the initial state by triggering the fourth switch 26.
Further, a safety device for gas maintenance of the present invention further includes a safety valve 16 and/or a strainer 17 disposed between the pressure monitoring unit and the output port 18. Specifically, the safety valve 16 is arranged between the pressure monitoring unit 15 and the output port 18, and when the gas pressure of the gas source is too high, the safety valve 16 is automatically opened to release the pressure to the atmosphere, so that the maintained equipment is ensured not to be overpressurized. The safety valve 16 may be a mechanical safety valve, and the usage scenario may ensure that the whole safety device is normal when the protection of the pressure monitoring unit 15 fails. A filter screen 17 can be arranged at the output port 18 to filter gas of a gas source, so that foreign matters are prevented from entering the maintained equipment.
Further, in an embodiment, the intake valve includes a first intake valve 141 and a second intake valve 142 connected in series with each other. Specifically, the intake valves include a first intake valve 141 and a second intake valve 142, which are connected in series with each other, and the gas source gas passes through in sequence. In addition, it can be understood that, in the power circuit, the external power source is connected to the first air intake valve 141 and the second air intake valve 142 through the second contact 21c of the first relay, respectively, to supply power to the first air intake valve 141 and the second air intake valve 142.
Further, the gas-water separation unit comprises a stainless steel gas-water separation tank 13, a first conduit 135 connected with the humidity monitoring unit, and a second conduit 136 connected with the air inlet valve, wherein the depth of the first conduit 135 is larger than that of the second conduit 136. Specifically, the gas-water separation unit 13 is set up as a stainless steel gas-water separation tank, and two guide pipes are arranged on the upper portion of the stainless steel gas-water separation tank, wherein the first guide pipe 135 is connected with the humidity monitoring unit, the second guide pipe 136 is connected with the air inlet valve, the depth of the opening of the first guide pipe 135 in the stainless steel gas-water separation tank is lower than that of the opening of the second guide pipe 136 in the stainless steel gas-water separation tank, the opening of the first guide pipe 135 is lower than that of the second guide pipe 136, so that after the gas source enters the stainless steel gas-water separation tank, the gas with large humidity sinks, and the gas with small humidity rises to ensure the gas-water separation effect of the stainless steel gas.
Further, the safety device for gas maintenance of the invention further comprises a printer 29, and the printer 29 can automatically print parameters such as dew point, pressure and the like in the maintenance process according to the setting and the preset interval time, such as every half hour to every hour, so that the safety device can be used for personnel inspection, and the personnel inspection time is saved.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A safety device for gas maintenance, comprising: the device comprises an input port, an output port, a humidity monitoring unit, a gas-water separation unit, an air inlet valve and a discharge valve, wherein the input port is used for being connected with an air source, the output port is used for being connected with a device to be maintained, the humidity monitoring unit, the gas-water separation unit and the air inlet valve are sequentially connected in series between the input port and the output port, and the discharge valve is arranged;
the humidity monitoring unit is used for monitoring the gas humidity of the gas source gas;
when the gas humidity meets a first preset value, the air inlet valve is opened, the exhaust valve is closed, and the gas of the gas source sequentially passes through the input port, the humidity monitoring unit, the gas-water separation unit and the air inlet valve and then enters the maintained equipment through the output port; when the gas humidity exceeds the first preset value, the air inlet valve is closed, and the exhaust valve is opened;
and
a power supply circuit for connecting an external power supply, the power supply circuit including a first relay and a first switch;
a coil of the first relay is connected in series with the first switch, a first contact of the first relay is connected in parallel with the first switch,
a second contact of the first relay connects the external power source and the discharge valve and the intake valve;
the discharge valve is a normally open valve, and the air inlet valve is a normally closed cold valve;
the gas-water separation device also comprises a liquid detection unit arranged at the bottom of the gas-water separation unit;
the liquid detection unit is used for monitoring moisture in the gas-water separation unit, and when the moisture is detected, the air inlet valve is closed, and the drain valve is opened;
the liquid detection unit comprises a liquid level switch, and the power circuit further comprises a fourth relay; the coil of fourth relay with connect after the liquid level switch series connection the external power source, the first contact of fourth relay with liquid level switch parallel connection, the second contact of fourth relay with first switch series connection, power supply circuit still include with liquid level switch series connection's third switch.
2. The safety device for gas servicing according to claim 1, further comprising a pressure monitoring unit disposed between the inlet valve and the outlet port;
the pressure monitoring unit is used for monitoring the pressure of gas entering the output port, and when the pressure of the gas exceeds a second preset value, the air inlet valve is closed, and the exhaust valve is opened.
3. A safety arrangement for gas servicing according to claim 2, characterized in that the humidity monitoring unit comprises a dew point meter and the pressure monitoring unit comprises a pressure sensor.
4. A safety device for gas servicing according to claim 3, wherein the power circuit further comprises a second relay;
and a coil of the second relay is connected with the dew point instrument in series and then is connected with the external power supply, and a contact of the second relay is connected with the first switch in series.
5. The safety device for gas servicing according to claim 4, wherein the power circuit further comprises a third relay;
the coil of the third relay is connected with the external power supply after being connected with the pressure sensor in series, the first contact of the third relay is connected with the pressure sensor in parallel, and the second contact of the third relay is connected with the first switch in series.
6. The safety device for gas servicing according to claim 5, characterized in that the power circuit further comprises a second switch connected in series with the pressure sensor.
7. A safety device for gas servicing according to claim 5, the power supply circuit further comprising a first indicator light connected in series with the first switch, and/or a second indicator light connected in series with the dew point meter; and/or a third indicator light connected in series with the pressure sensor, and/or a fourth indicator light connected in series with the level switch.
8. A safety apparatus for gas servicing according to claim 3, wherein the power circuit further comprises a fourth switch in series with the first switch.
9. A safety device for gas servicing according to claim 2, further comprising a safety valve and/or a sieve arranged between the pressure monitoring unit and the output port.
10. A safety apparatus for gas servicing according to claim 1, wherein the inlet valve comprises a first inlet valve and a second inlet valve in series with each other; and/or
The gas-water separation unit comprises a stainless steel gas-water separation tank, a first guide pipe and a second guide pipe, wherein the first guide pipe is connected with the humidity monitoring unit, the second guide pipe is connected with the air inlet valve, and the depth of the first guide pipe is larger than that of the second guide pipe.
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| CN201910199420.XA CN109798444B (en) | 2019-03-15 | 2019-03-15 | Safety device for gas maintenance |
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| CN201910199420.XA CN109798444B (en) | 2019-03-15 | 2019-03-15 | Safety device for gas maintenance |
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| CN109798444B true CN109798444B (en) | 2021-05-14 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126200A (en) * | 1979-03-22 | 1980-09-29 | Nippon Sanso Kk | Supplying method of compressed gas |
| JP3723083B2 (en) * | 2001-03-02 | 2005-12-07 | 株式会社日立製作所 | Compressed air supply device |
| CN2890582Y (en) * | 2006-01-18 | 2007-04-18 | 上海熊猫机械(集团)有限公司 | Gas supply device |
| JP4917158B2 (en) * | 2010-03-03 | 2012-04-18 | 中外炉工業株式会社 | High pressure dry air supply system |
| CN202349595U (en) * | 2011-11-25 | 2012-07-25 | 鸿圣（江西）彩印包装实业有限公司 | Compressed air concentrated supply device |
| CN103174937B (en) * | 2013-02-26 | 2015-06-10 | 北京恒企新能源科技有限公司 | Compressed air comprehensive manufacturing, conveying and applying system |
| CN103611394A (en) * | 2013-10-31 | 2014-03-05 | 国家电网公司 | Compressed air gas source system for high voltage live working |
| CN206694838U (en) * | 2017-04-25 | 2017-12-01 | 江苏长青农化南通有限公司 | A kind of adjustable feeder of Acetamiprid production |
| CN207488249U (en) * | 2017-11-29 | 2018-06-12 | 中国石油集团渤海钻探工程有限公司 | For the air source filter device of the chromatograph of oil exploration |
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