CN204663896U - A kind of pneumatic control system of natural gas screw compressor - Google Patents
A kind of pneumatic control system of natural gas screw compressor Download PDFInfo
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- CN204663896U CN204663896U CN201420863462.1U CN201420863462U CN204663896U CN 204663896 U CN204663896 U CN 204663896U CN 201420863462 U CN201420863462 U CN 201420863462U CN 204663896 U CN204663896 U CN 204663896U
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Abstract
The utility model discloses a kind of pneumatic control system of natural gas screw compressor, comprise: intake valve, pressure-reducing valve, Inner eycle atmospheric valve and shutdown atmospheric valve, the inlet chamber being communicated with compressor air suction end and two working chambers that control connected state are provided with in intake valve valve body, the air inlet parallel connection of pressure-reducing valve, Inner eycle atmospheric valve and shutdown atmospheric valve, and be communicated with external feed stream pipeline; The gas outlet of pressure-reducing valve is connected with the air inlet of three magnetic valves in parallel; Gas outlet connection intake valve one working chamber of the first magnetic valve; Another working chamber of intake valve of the gas outlet connection parallel connection of the second magnetic valve and the signal port of Inner eycle atmospheric valve, the inlet chamber of the gas outlet connection intake valve of Inner eycle atmospheric valve; The signal port of atmospheric valve is shut down in the gas outlet connection of the 3rd magnetic valve, shuts down the gas outlet connection emptying adapter of atmospheric valve. Pneumatic control system is divided into loading, Inner eycle and shuts down three kinds of mode of operations, makes the natural gas that remains certain interior pressure in unit.
Description
Technical field
The utility model relates to screw compressor technology field, relates in particular to a kind of pneumatic control system of natural gas screw compressor.
Background technology
Screw compressor is divided into loading, unloading and shuts down three kinds of different patterns; the corresponding pneumatic control system of compressor coordinates different mode of operations; when air is as Inner eycle dielectric gas; during compressor unloading; pressure release emptying is divided splenium in unit by pneumatic control system; during compressor shutdown, by pneumatic control system pressing complete pressure release emptying in unit. But when natural gas is as Inner eycle dielectric gas; during compressor unloading; pneumatic control system can not carry out pressure pressure release emptying in unit; during compressor shutdown, pneumatic control system will carry out splenium in unit and divide pressure release emptying, and the natural gas of certain interior pressure will be remained in unit; object one is natural gas compressor unit inside to be sneaked in order to ensure outside air; stop potential safety hazard, two is that the wasting of resources will be reduced as far as possible, and the regeneration period of natural gas is very long after all.
Therefore, being necessary very much to be improved for the pneumatic control system of screw compressor of the prior art, and then designing a kind of pneumatic control system that is applicable to natural gas screw compressor, is industry technical problem urgently to be resolved hurrily.
Utility model content
Technical problem to be solved in the utility model is in order to overcome above-mentioned the deficiencies in the prior art; a kind of pneumatic control system of natural gas screw compressor is provided; pneumatic control system is divided into loading, Inner eycle and shuts down three kinds of mode of operations, makes the natural gas that remains certain interior pressure in unit.
The technical solution adopted in the utility model is: a kind of pneumatic control system of natural gas screw compressor, comprise: intake valve, pressure-reducing valve, Inner eycle atmospheric valve and shutdown atmospheric valve, the inlet chamber being communicated with compressor air suction end and two working chambers that control connected state are provided with in described intake valve valve body, the air inlet parallel connection of described pressure-reducing valve, Inner eycle atmospheric valve and shutdown atmospheric valve, and be communicated with external feed stream pipeline; The gas outlet of described pressure-reducing valve is connected with the air inlet of three magnetic valves in parallel; Gas outlet connection intake valve one working chamber of the first magnetic valve; Another working chamber of intake valve of the gas outlet connection parallel connection of the second magnetic valve and the signal port of Inner eycle atmospheric valve, the inlet chamber of the gas outlet connection intake valve of Inner eycle atmospheric valve; The signal port of atmospheric valve is shut down in the gas outlet connection of the 3rd magnetic valve, shuts down the gas outlet connection emptying adapter of atmospheric valve.
The gas outlet pipeline of described Inner eycle atmospheric valve is provided with the first check valve.
The gas outlet pipeline of described shutdown atmospheric valve is provided with the second check valve that prevents outside air adverse current.
Also comprise the venting check valve of being located on compressor high pressure gas passage.
Also comprise parallel connection and be located at the oil cut-off valve of connecting, disconnect lubricating oil pipeline for gas control on compressor high pressure gas passage.
Described intake valve comprises: fix valve body on the compressor and be located at the endoceliac gland of valve and spool, gland fixed cap is in valve body chamber, and valve body chamber is divided into inlet chamber and working chamber, the side opening of inlet chamber is provided with air inlet, bottom surface offers gas outlet, and inlet chamber is directly communicated with the suction end of compressor by gas outlet; Spool comprises the main shaft that runs through gland, the two ends that are connected to main shaft and is located at respectively working piston plate in working chamber and the inlet piston of being located in inlet chamber, working piston plate is divided into left and right two working chambers working chamber, inlet piston is located at the inner side of air inlet, and working piston plate is driven inlet piston bilateral reciprocation by main shaft.
Compared with prior art, the utility model has the following advantages: the pneumatic control system of natural gas screw compressor is divided into loading, Inner eycle and shuts down three kinds of mode of operations, when pressure at expulsion reaches setting value, pneumatic control system is opened Inner eycle pattern, by Inner eycle atmospheric valve, interior pressure natural gas circulation is drained in compressor, keeps certain interior pressure of unit; When the compressor is shut down, pneumatic control system is opened shutdown mode, presses natural gas to be drained in compressor by Inner eycle atmospheric valve in a part, keeps pressing in certain unit, presses natural gas then by shutting down atmospheric valve pressure release emptying in another part. The natural gas of pressing in making to remain necessarily in Compressor Group with this, avoids sneaking into air in Compressor Group, stops potential safety hazard, reduce the wasting of resources simultaneously, cost-saving.
Accompanying drawing explanation
Below in conjunction with embodiment and accompanying drawing, the utility model is described in detail, wherein:
Fig. 1 is syndeton schematic diagram of the present utility model;
Fig. 2 is intaking valve structure schematic diagram of the present utility model.
Detailed description of the invention
Refer to Fig. 1, the pneumatic control system of a kind of natural gas screw compressor the utility model proposes, comprise intake valve 1, pressure-reducing valve 2, Inner eycle atmospheric valve 3, shut down atmospheric valve 4 and three magnetic valves.
Refer to Fig. 2, be described below in detail the structure of intake valve 1, it comprises: be fixed on the valve body 101 on compressor 12 and be located at the endoceliac gland 102 of valve and spool. Gland 102 fixed cap is in valve body chamber, and valve body chamber is divided into left and right two chambers, left chamber is inlet chamber, right chamber is working chamber, the side opening of inlet chamber is provided with air inlet, air inlet access air intake filter 14, and air intake filter 14 is passed into natural gas by air inlet tube, the bottom of inlet chamber has gas outlet, and inlet chamber is directly communicated with the suction end of compressor 12 by gas outlet. Spool comprises the main shaft 103 that runs through gland 102, the two ends that are connected to main shaft 103 and is located at respectively working piston plate 104 in working chamber and the inlet piston 105 of being located in inlet chamber, working piston plate 104 is divided into left and right two working chambers working chamber, the side opening of working chamber is provided with and controls mouth, the control mouth of left working chamber is connected with the first magnetic valve 5, the control mouth of right working chamber is connected with the second magnetic valve 6, inlet piston 105 is located at the inner side of air inlet, and working piston plate 104 is driven the synchronous bilateral reciprocation of inlet piston 105 by main shaft 103. The mode of operation of intake valve 1: connection, disconnection by first, second magnetic valve accurately control air pressure different in two working chambers, utilizes the draught head of two working chambers to promote spool bilateral reciprocation, and then controls the different connected state of air inlet.
Inner eycle atmospheric valve 3 and shutdown atmospheric valve 4 are provided with three interfaces: i.e. air inlet (I mouth), exhaust outlet (O mouth) and signal port (P mouth); signal port is opened by solenoid control, is closed; when signal port has been opened air pressure signal; open atmospheric valve; air pressure proceed from air inlet to, through exhaust outlet pressure release emptying, otherwise; when signal port is closed when there is no air pressure signal, then close atmospheric valve.
The air inlet parallel connection of pressure-reducing valve 2, Inner eycle atmospheric valve 3 and shutdown atmospheric valve 4, and the gas outlet of accessing gs-oil separator 13; The air inlet of three magnetic valves of the gas outlet connection parallel connection of pressure-reducing valve 2, magnetic valve is respectively normally closed the first magnetic valve 5, often drives the second magnetic valve 6 and normally closed 3rd magnetic valve 7, pressure-reducing valve 2 be can be reliable and stable in order to ensure three magnetic valves stability under high inner pressure ring border of work, especially magnetic valve; The left working chamber control mouth of the gas outlet connection intake valve 1 of the first magnetic valve 5, for controlling the spool of opening intake valve 1; The right working chamber control mouth of the intake valve 1 of the gas outlet connection parallel connection of the second magnetic valve 6 and the signal port of Inner eycle atmospheric valve 3 for controlling the spool of closing intake valve 1, and are opened the pressure release emptying of Inner eycle atmospheric valve 3 simultaneously; The inlet chamber of the gas outlet connection intake valve 1 of Inner eycle atmospheric valve 3, during for Inner eycle pattern, enters interior pressure natural gas to compressor 12 Inner eycle; The signal port of atmospheric valve 4 is shut down in the gas outlet connection of the 3rd magnetic valve 7, shuts down atmospheric valve 4 pressure release emptying for controlling to open; Shut down the gas outlet connection emptying adapter 15 of atmospheric valve 4, during for shutdown mode, discharge pressure natural gas in a part.
The gas outlet of Inner eycle atmospheric valve 3 pipeline is provided with the first check valve 8, for preventing natural gas adverse current from returning Inner eycle atmospheric valve 3; In like manner, the gas outlet pipeline of shutting down atmospheric valve 4 is also provided with the second check valve 9, for preventing outside air to be back to machine set system inside, causes potential safety hazard.
In order to improve the reliable and stable of compressor assembly operation, the utility model also comprises: be located at the venting check valve 10 on the high pressure gas passage of compressor 12, make gas that from compressor 12, gs-oil separator 13 can only be flowed to, can not pour in down a chimney; And the oil cut-off valve 11 on described high pressure gas passage is located in parallel connection, oil cut-off valve 11 is connected for gas control, is disconnected the lubricating oil pipeline flowing in compressor 12, when compressor 12 moves, and the air pressure signal in oil cut-off valve access passage, by-pass valve control is opened, the lubrication oil circulation in compressor 12; When compressor 12 is shut down, oil cut-off valve disconnects air pressure signal, and by-pass valve control is closed, and cuts off lubrication oil circulation, thus avoids the interior shaft seal of compressor 12 to impact.
The course of work of the present utility model: when loading mode, the first magnetic valve 5 obtains electric opening, the second magnetic valve 6 obtains electric cutting out, 3rd magnetic valve 7 dead electricity is closed, the left working chamber air pressure of intake valve 1 is higher than right working chamber, the spool that then promotes intake valve 1 is opened air inlet, and now the signal port of two atmospheric valves is all closed without air pressure signal; When the pressure at expulsion of gs-oil separator 13 reaches setting value, when opening Inner eycle pattern, the first magnetic valve 5 dead electricity is closed, the second magnetic valve 6 dead electricity is opened, 3rd magnetic valve 7 dead electricity is closed, and then the spool of intake valve 1 is closed air inlet, now the signal port access air pressure signal of Inner eycle atmospheric valve 3, open Inner eycle atmospheric valve 3, the high-pressure natural gas in gs-oil separator 13 starts the inlet chamber exhaust to intake valve 1; When shutdown mode; the first magnetic valve 5 dead electricity is closed; the second magnetic valve 6 dead electricity is opened; 3rd magnetic valve 7 obtains electric opening; then the spool of intake valve 1 is closed air inlet; now the signal port of Inner eycle atmospheric valve 3 is connected to air pressure signal; high-pressure natural gas in gs-oil separator 13 starts the inlet chamber exhaust to intake valve 1; meanwhile; 3rd magnetic valve 7 is set as obtaining electric 3 minutes; shut down the signal port access air pressure signal of atmospheric valve 4, open and shut down atmospheric valve 4, the high-pressure natural gas in gs-oil separator 13 starts to emptying adapter 15 pressure release emptying. Wherein, must will setting according to actual needs by electric duration of the 3rd magnetic valve 7, is not limited to 3 minutes.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, do any amendment, be equal to replacement and improvement etc., within protection domain of the present utility model all should be included in.
Claims (6)
1. the pneumatic control system of a natural gas screw compressor, it is characterized in that, comprise: intake valve (1), pressure-reducing valve (2), Inner eycle atmospheric valve (3) and shutdown atmospheric valve (4), the inlet chamber being communicated with compressor air suction end and two working chambers that control connected state are provided with in described intake valve valve body, the air inlet parallel connection of described pressure-reducing valve, Inner eycle atmospheric valve and shutdown atmospheric valve, and be communicated with external feed stream pipeline;
The gas outlet of described pressure-reducing valve is connected with the air inlet of three magnetic valves in parallel; Gas outlet connection intake valve one working chamber of the first magnetic valve (5); Another working chamber of intake valve of the gas outlet connection parallel connection of the second magnetic valve (6) and the signal port of Inner eycle atmospheric valve, the inlet chamber of the gas outlet connection intake valve of Inner eycle atmospheric valve; The signal port of atmospheric valve is shut down in the gas outlet connection of the 3rd magnetic valve (7), shuts down the gas outlet connection emptying adapter of atmospheric valve.
2. the pneumatic control system of natural gas screw compressor as claimed in claim 1, it is characterized in that, the gas outlet pipeline of described Inner eycle atmospheric valve (3) is provided with the first check valve (8).
3. the pneumatic control system of natural gas screw compressor as claimed in claim 1, it is characterized in that, the gas outlet pipeline of described shutdown atmospheric valve (4) is provided with the second check valve (9) that prevents outside air adverse current.
4. the pneumatic control system of natural gas screw compressor as claimed in claim 1, is characterized in that, also comprise the venting check valve (10) of being located on compressor (12) high pressure gas passage.
5. the pneumatic control system of natural gas screw compressor as claimed in claim 1, is characterized in that, also comprises parallel connection and is located at the oil cut-off valve (11) of connecting, disconnect lubricating oil pipeline for gas control on compressor (12) high pressure gas passage.
6. the pneumatic control system of the natural gas screw compressor according to claim 1 to 5 any one, it is characterized in that, described intake valve (1) comprising: fix valve body (101) on the compressor and be located at the endoceliac gland of valve (102) and spool, gland fixed cap is in valve body chamber, and valve body chamber is divided into inlet chamber and working chamber, the side opening of inlet chamber is provided with air inlet, bottom surface offers gas outlet, and inlet chamber is directly communicated with the suction end of compressor by gas outlet;
Spool comprises the main shaft (103) that runs through gland, the two ends that are connected to main shaft and is located at respectively working piston plate (104) in working chamber and the inlet piston (105) of being located in inlet chamber, working piston plate is divided into left and right two working chambers working chamber, inlet piston is located at the inner side of air inlet, and working piston plate is driven inlet piston bilateral reciprocation by main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863462.1U CN204663896U (en) | 2014-12-31 | 2014-12-31 | A kind of pneumatic control system of natural gas screw compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863462.1U CN204663896U (en) | 2014-12-31 | 2014-12-31 | A kind of pneumatic control system of natural gas screw compressor |
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| CN204663896U true CN204663896U (en) | 2015-09-23 |
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| CN201420863462.1U Active CN204663896U (en) | 2014-12-31 | 2014-12-31 | A kind of pneumatic control system of natural gas screw compressor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286254A (en) * | 2016-10-08 | 2017-01-04 | 湖北特威特动力科技股份有限公司 | A kind of air compressor machine of full-automatic unmanned supervision |
| CN107859615A (en) * | 2017-11-22 | 2018-03-30 | 杰瑞石油天然气工程有限公司 | A kind of new type of compression unit is vented flow |
| CN112879296A (en) * | 2021-01-22 | 2021-06-01 | 重庆开山流体机械有限公司 | Vacuum pumping system |
| US20220412342A1 (en) * | 2021-06-28 | 2022-12-29 | Honda Motor Co., Ltd. | Decompression system and decompression method |
-
2014
- 2014-12-31 CN CN201420863462.1U patent/CN204663896U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286254A (en) * | 2016-10-08 | 2017-01-04 | 湖北特威特动力科技股份有限公司 | A kind of air compressor machine of full-automatic unmanned supervision |
| CN107859615A (en) * | 2017-11-22 | 2018-03-30 | 杰瑞石油天然气工程有限公司 | A kind of new type of compression unit is vented flow |
| CN112879296A (en) * | 2021-01-22 | 2021-06-01 | 重庆开山流体机械有限公司 | Vacuum pumping system |
| CN112879296B (en) * | 2021-01-22 | 2022-01-04 | 重庆开山流体机械有限公司 | Vacuum pumping system |
| US20220412342A1 (en) * | 2021-06-28 | 2022-12-29 | Honda Motor Co., Ltd. | Decompression system and decompression method |
| US11867170B2 (en) * | 2021-06-28 | 2024-01-09 | Honda Motor Co., Ltd. | Decompression system and decompression method |
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