CN202302731U - CNG (compressed natural gas) filling substation - Google Patents
CNG (compressed natural gas) filling substation Download PDFInfo
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- CN202302731U CN202302731U CN2011204432379U CN201120443237U CN202302731U CN 202302731 U CN202302731 U CN 202302731U CN 2011204432379 U CN2011204432379 U CN 2011204432379U CN 201120443237 U CN201120443237 U CN 201120443237U CN 202302731 U CN202302731 U CN 202302731U
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Abstract
The utility model discloses a CNG (compressed natural gas) filling substation, and belongs to the technical field of the production and the manufacturing of CNG filling equipment. The utility model provides the CNG filling substation, and by using the CNG filling substation, the utilization rate of natural gas in a gas filling bottle group can be effectively improved. The CNG filling substation comprises a gas filler, a hydraulic piston type natural gas compressor, and CNG filling bottle groups which are arranged on a CNG trailer and are at least divided into three groups; the hydraulic piston type natural gas compressor is provided with an input interface and an output interface; in multiple groups of CNG filling bottle groups, one group is a high-pressure bottle group and other groups are gas obtaining bottle groups; the high-pressure bottle group is provided with a high-pressure output end and a high-pressure input end; the high-pressure input end is connected with the output interface of the hydraulic piston type natural gas compressor; the high-pressure output end is connected with the gas filler; each gas obtaining bottle group is provided with one gas input end and one gas output end; the gas output end is connected with the input interface of the hydraulic piston type natural gas compressor; and the gas input end is connected with an outlet of the hydraulic piston type natural gas compressor.
Description
Technical field
The utility model relates to a kind of CNG air entraining substation, belongs to CNG aerating device fabrication manufacturing technology field.
Background technique
General gas station type is according to on-the-spot or neighbouring whether the natural gas pipe network arranged, and is divided into conventional station, female station and substation.Conventional station is the place of building the natural gas pipe network in, directly on the natural gas high pressure pipe network, gets gas, and natural gas is through desulfurization, dehydration, compression, and entering adds the gas cylinder group and stores or give refueling.The refueling mother station construction is in the place of closing on the natural gas pipe network; And the substation is built in the bigger city of gas consumption or by the highway; Through transfer vehicle natural gas is transported to the substation from the mother station then; Aerating equipment through the substation is given refueling, at this moment, generally all is provided with station internal fixation air cylinder group or gas storage well.
At present, the CNG air entraining substation all is traditional mechanical formula compressor air entraining substation basically both at home and abroad.When the employing of mechanical commprssor air entraining substation adds gas cylinder group storage natural gas; Air cylinder is divided into high pressure group, middle pressure group and low pressure group in generally all will standing, and selects high pressure group and low pressure group according to variation of gas pressure in the air cylinder of the automobile of needs aerating in the aerating process; Simultaneously, in the aerating process, along with the distribution of natural gas, the pressure in the high and low pressure group air cylinder also can constantly reduce.In order to keep normal pressure; Can the natural gas in the air cylinder farthest be cemented out simultaneously and add in the automobile; And improve aerating speed, and need constantly to give air cylinder group supercharging in the station through compressor, can add in the automobile to guarantee the natural gas that adds in the gas cylinder.And gas will absorb heat when decompression, will discharge heat during supercharging, and in the mechanical compress process; Along with the continuous reduction of inlet pressure, compressor operating time will progressively prolong, and energy loss strengthens; Mechanical efficiency reduces, and then influences the life-span of compressor.And the natural gas utilization ratio in the general CNG trailer long tube steel cylinder is merely 75%～80%, approximately 800Nm
3Natural gas can not cement out, can only be to and from transit with trailer, cost of transportation is improved.In addition, the released gas rate of mechanical commprssor air entraining substation mechanical filler and oil and water seperator is higher, usually 0.5%～1%, causes the waste of natural gas gas.
The model utility content
The utility model technical problem to be solved is: a kind of CNG air entraining substation that can effectively improve the utilization ratio that adds natural gas in the gas cylinder group is provided.
The technological scheme that adopts for solving the problems of the technologies described above is: a kind of CNG air entraining substation; At least three group CNG that comprise filling machine, hydraulic piston type natural gas compressor and be arranged on the trailer add the gas cylinder group; The hydraulic piston type natural gas compressor has an input interface and an output interface; Said many group CNG add in the gas cylinder group, have one group to be the bomb group, and all the other each groups are for getting the gas cylinder group; The bomb group has a high-voltage output end and a high voltage input terminal, and high-voltage output end is connected with filling machine, and high voltage input terminal is connected with the output interface of hydraulic piston type natural gas compressor; Get the gas cylinder group and have a gas output end, the gas output end of getting the gas cylinder group is connected with the input interface of hydraulic piston type natural gas compressor.
Further be, also include automatic control system, automatic control system passes device by PLC module, touch screen, pneumatic ball valve and pressure and constitutes; Pressure transducer has two, is installed in respectively on the output interface and input interface of hydraulic piston type natural gas compressor, and its signal output part is connected with the PLC module; Pneumatic ball valve contains air-operated solenoid valve, and on the high-voltage output end of bomb group and the high voltage input terminal and get on the gas output end of gas cylinder group described pneumatic ball valve is installed respectively, the guide line of the air-operated solenoid valve of each pneumatic ball valve all is connected with the PLC module; The signal output part of touch screen is connected with the PLC module.
Further be, the output terminal that said many groups are got the pneumatic ball valve of installing on the gas output end of gas cylinder group collects on the export pipeline, and the gas output end of each air cylinder group is connected with the input interface of hydraulic piston type natural gas compressor through export pipeline.
Further be, on export pipeline, also have a delivery outlet, this delivery outlet is connected with filling machine, and the high-voltage output end of bomb group is connected with filling machine through delivery outlet.
Further be; Get the gas cylinder group for every group and also all have a gas input end; Described pneumatic ball valve also all is installed on the said gas input end, and the input end of said pneumatic ball valve collects on the intake pipeline, and the input end of intake pipeline is connected with the output interface of hydraulic piston type natural gas compressor; The high voltage input terminal of bomb group is connected with the output interface of hydraulic piston type natural gas compressor through intake pipeline, and the guide line of the air-operated solenoid valve of pneumatic ball valve all is connected with the PLC module.
Further be, on intake pipeline, also have a high pressure output interface, this high pressure output interface is connected with filling machine.
Further be on the intake pipeline between high pressure output interface and the output interface, and on the export pipeline between delivery outlet and the input interface, to be separately installed with manual ball valve.
Further be, every group of CNG adds the gas cylinder group and comprises at least two long tube steel cylinders, and each described CNG air entraining substation comprises that four to five groups of described CNG add the gas cylinder group.
The beneficial effect of the utility model is: through trailer long tube steel cylinder is divided into groups; Trailer CNG is added the gas cylinder component become being used for of directly being connected to get the gas cylinder group, and change original mechanical commprssor into the hydraulic piston type gas compressor to what the bomb group of refueling and at least two were used to extract and store natural gas with filling machine.Like this, because of after will hanging down to refueling pressure, can very easily the natural gas of getting in the gas cylinder group be imported in the bomb group through gas compressor compression back, guarantee the atmospheric pressure that adds of bomb group in the bomb group.And aerating is when not busy, and compressor is got gas cylinder from last group of low pressure and extracted rock gas gas compression supercharging once more, pours next group into and gets the gas cylinder bottle; Last low pressure is got gas cylinder group residue gas pressure to be evacuated to lower and next to be got gas cylinder group pressure improve; The low high function of mending is got in completion; Thereby can guarantee to greatest extent the natural gas in the air cylinder group to be extracted out; Thereby effectively raise the utilization ratio that adds natural gas in the gas cylinder, and aerating efficient.Simultaneously, owing to also no longer as traditional mechanical air entraining substation oil mechanical seal filler and multi-grade oil separator, have numerous natural gas leaking points, so rock gas can be accomplished zero leakage basically, the utilization ratio and the Security of air entraining substation rock gas are largely increased.In addition, the hydraulic pressure compressor has been discarded the complicated heavy crankshaft-linking rod drive mechanism of mechanical compressor, replaces with soft hydraulic transmission stably, and equipment moving is steady, shakes for a short time, and noise is low.System is also more energy-conservation.Simultaneously, cancellation station internal fixation air cylinder group has been cancelled priority control panel and discharge column, and the cost of investment of building air entraining substation is greatly reduced.
Description of drawings
Fig. 1 is the simplified structure schematic representation of a kind of CNG air entraining substation of the utility model;
Fig. 2 is the automatic control system block diagram of a kind of CNG air entraining substation of the utility model.
Be labeled as among the figure: filling machine 1, hydraulic piston type natural gas compressor 2, input interface 21, output interface 22, bomb group 3, high-voltage output end 31, high voltage input terminal 32, get gas cylinder group 4, gas output end 41, gas input end 42, PLC module 5, touch screen 6, pneumatic ball valve 7, air-operated solenoid valve 71, pressure and pass device 8, export pipeline 9, delivery outlet 91, intake pipeline 10, high pressure output interface 101, manual ball valve 11, long tube steel cylinder 12, trailer 13.
Embodiment
As Fig. 1, shown in Figure 2 be a kind of CNG air entraining substation that can effectively improve the utilization ratio that adds natural gas in the gas cylinder group that the utility model provides.Said CNG air entraining substation comprises filling machine 1, hydraulic piston type natural gas compressor 2 and at least three group CNG that are arranged on the trailer 13 add the gas cylinder group; Hydraulic piston type natural gas compressor 2 has an input interface 21 and an output interface 22; Said many group CNG add in the gas cylinder group; Have one group to be bomb group 3, all the other each groups are for getting gas cylinder group 4; Bomb group 3 has a high-voltage output end 31 and a high voltage input terminal 32, and high-voltage output end 31 is connected with filling machine 1, and high voltage input terminal 32 is connected with the output interface 22 of hydraulic piston type natural gas compressor 2; Get gas cylinder group 4 and have a gas output end 41, the gas output end 41 of getting gas cylinder group 4 is connected with the input interface 21 of hydraulic piston type natural gas compressor 2.Like this; Through existing long tube steel cylinder 12 is divided into groups; Being divided into being used for of directly being connected with filling machine 1 gets gas cylinder group 4 to what the bomb group 3 of refueling and at least two were used to store natural gas, and changes original mechanical commprssor into hydraulic piston type natural gas compressor 2.Like this, because of after giving the reduction of refueling pressure, can very easily the natural gas of getting in the gas cylinder group 4 be added in the gas cylinder group 3 through hydraulic piston type natural gas compressor 2 compression back input high pressure, guarantee that high pressure adds the atmospheric pressure of gas cylinder group 3 in bomb group 3.And aerating is when not busy, and hydraulic piston type natural gas compressor 2 is got from last group of low pressure and extracted rock gas gas compression supercharging the gas cylinder group 4 once more, pours next group into to get in the gas cylinder group 4; Last low pressure is got in the gas cylinder group 4 the residue gas pressure to be evacuated to lower; And next is got gas cylinder group pressure improve; The low height of mending is got in completion; Thereby the natural gas that can guarantee will get to greatest extent in the gas cylinder group 4 is extracted out, thereby effectively raises the utilization ratio that adds natural gas in the gas cylinder group, has improved aerating efficient.Simultaneously, owing to also no longer as traditional mechanical air entraining substation oil mechanical seal filler and multi-grade oil separator, have numerous natural gas leaking points, so rock gas can be accomplished zero leakage basically, the utilization ratio and the Security of air entraining substation rock gas are largely increased.
In order to improve the automaticity of air entraining substation aerating; Labor intensity of operating personnel is fallen; Improve the Security of operation, the CNG air entraining substation of the utility model also includes automatic control system, and automatic control system passes device 8 by PLC module 5, touch screen 6, pneumatic ball valve 7 and pressure and constitutes; Pressure transducer 8 has two, is installed in respectively on the output interface 22 and input interface 21 of hydraulic piston type natural gas compressor 2, and its signal output part is connected with PLC module 5; Pneumatic ball valve 7 contains air-operated solenoid valve 71; On the high-voltage output end 31 of bomb group 3 and the high voltage input terminal 32 and get on the gas output end 41 of gas cylinder group 4 described pneumatic ball valve 7 is installed respectively, the guide line of the air-operated solenoid valve 71 of each pneumatic ball valve 7 all is connected with PLC module 5; The signal output part of touch screen 6 is connected with PLC module 5.Like this; Certainly hydraulic piston type natural gas compressor 2 gets that natural gas in the gas cylinder group 4 compresses and when importing in the bomb group 3 in extraction; Pressure transducer 8 can detect the pressure of getting in the gas cylinder group 4 automatically; And the pressure in the bomb group 3, and with in this force value input PLC module 5.When the pressure in the bomb group 3 reaches the specified value of aerating; With in this force value input PLC module 5, according to the program that in advance be provided with through air-operated solenoid valve 71 send instruction automatically close pneumatic ball valve 7 too by PLC module 5 for pressure transducer 8; At this moment; Neither natural gas is provided to hydraulic piston type natural gas compressor 2, the natural gas that hydraulic piston type natural gas compressor 2 is not also imported after compressing to bomb group 3, the hydraulic piston type natural gas compressor quits work automatically.When bomb group 3 through filling machine to refueling and after pressure reduced, pressure transducer 8 detected the force value of the high voltage input terminal 32 of bomb group 3 automatically, and resets hydraulic piston type natural gas compressor 2 through PLC module 5.The whole operation process is accomplished automatically, does not need that operator open, the operation of cut-off valve, has both reduced labor intensity of operating personnel, has improved operating security again.
As shown in Figure 1, the gas cylinder group 4 of getting in the above-mentioned mode of execution generally all has two groups at least, is made as three groups or four groups usually, and also not only one of the long tube steel cylinder 12 in every group is made as two usually.For the ease of narration; The utility model is divided into long tube steel cylinder 12 one～No. eight with long tube steel cylinder 12 number consecutivelies; Then one, No. two long tube steel cylinder 12 is set to bomb group 3; All the other each long tube steel cylinders 12 match in twos and are divided into three groups to four groups and get gas cylinder group 4, and the pneumatic ball valve 7 that is connected with each bottle group is numbered K1～K8 respectively.For the ease of respectively getting gas cylinder group 4 to hydraulic piston type natural gas compressor 2 air feed; And respectively get and each other fall gas between the gas cylinder group 4; To improve the working efficiency of hydraulic piston type natural gas compressor 2, simultaneously, get the force value in the gas cylinder group 4 for the ease of working as; The specified value that reaches aerating in the early stage can directly be refueling through getting gas cylinder group 4; On the gas output end 41 that every group is got gas cylinder group 4 described pneumatic ball valve 7 is installed all, the output terminal of these a plurality of pneumatic ball valves 7 collects on the export pipeline 9, and the gas output end 41 of respectively getting gas cylinder group 4 is connected with the input interface 21 of hydraulic piston type natural gas compressor 2 through export pipeline 9; On export pipeline 9, also have a delivery outlet 91, this delivery outlet 91 is connected with filling machine 1, and the high-voltage output end 31 of bomb group 3 is connected with filling machine 1 through delivery outlet 91; Get gas cylinder group 4 for every group and also all have a gas input end 42; Described pneumatic ball valve 7 also all is installed on the said gas input end 42; The input end of said pneumatic ball valve 7 collects on the intake pipeline 10; The input end of intake pipeline 10 is connected with the output interface 22 of hydraulic piston type natural gas compressor 2; The high voltage input terminal 32 of bomb group 3 is connected with the output interface 22 of hydraulic piston type natural gas compressor 2 through intake pipeline 10, and the guide line of the air-operated solenoid valve 71 of pneumatic ball valve 7 all is connected with PLC module 5; On intake pipeline 10, also have a high pressure output interface 101, this high pressure output interface 101 is connected with filling machine 1.
Said structure unload gas, the working procedure of falling gas is following: when system start-up, often open 7, seven/No. eight bottles of K8 pneumatic ball valve when one/No. two bottle unloads gas, open K1 pneumatic ball valve 7, other pneumatic ball valve 7 is closed; Five/No. six bottles are opened K2 pneumatic ball valve 7 when one/No. two bottle unloads gas, other pneumatic ball valve 7 is closed; Three/No. four bottles are opened K3 pneumatic ball valve 7 when one/No. two bottle unloads gas, other pneumatic ball valve 7 is closed.Pressure in seven/No. eight bottles and five/No. six bottles is lower than setting value; And when compressor is in holding state; Begin to get into the pattern of falling gas, be about to seven/No. eight residual natural gass in the bottle and pour in five/No. six bottles, K3 pneumatic ball valve 7 is closed at this moment; Open K1, K6 pneumatic ball valve 7, all the other pneumatic ball valves 7 are closed.When three/No. four bottle pressures are lower than setting value, then work to get into and unload the gas in the bottle normally five/No. six, promptly open K2 pneumatic ball valve 7, all the other pneumatic ball valves are closed.Force value in three/No. four bottles and five/No. six bottles is lower than setting value, and compressor gets into the pattern of falling gas when being in holding state once more, is poured in three/No. four bottles by the residual gas in five/No. six bottles, promptly opens K2, K7 pneumatic ball valve 7, and all the other pneumatic ball valves 7 are closed.When five/No. six pressure of the inside of a bottle values are lower than settings, get into three/No. four bottles once more and normally unload gas, promptly open K3 pneumatic ball valve 7, all the other pneumatic ball valves are closed.The aforesaid said gas that unloads promptly is meant the natural gas of getting in the gas cylinder group 4 is imported in the bomb groups 3 through hydraulic piston type natural gas compressor 2; Described gas is meant that promptly the remaining natural gas of getting in the gas cylinder group 4 that the pressure low value is lower changes higher the getting in the gas cylinder group 4 of force value over to through hydraulic piston type natural gas compressor 2, gets the utilization ratio of natural gas in the gas cylinder group 4 with raising.Be in the starting stage when getting gas cylinder group 4; Force value reaches in the time of can directly giving refueling through filling machine 1; Can open K1, K2 or the K3 delivery outlet 91 through export pipeline 9 respectively to filling machine 1 air feed; Realize that undesirable gas compressor 2 and high pressure add gas cylinder group 3 directly to refueling, to reduce the aerating cost.In case of necessity, output interface 22 that can also be through hydraulic piston type natural gas compressor 2 and the high pressure output interface 101 on the intake pipeline 10 are directly to filling machine 1 air feed, to raise the efficiency.
In order to guarantee the whole air entraining substation phenomenon that when not working, do not leak air, on the intake pipeline between high pressure output interface 101 and the output interface 10, and on the export pipeline 10 between delivery outlet 91 and the input interface 21, be separately installed with manual ball valve 11.
Claims (8)
1. CNG air entraining substation; Comprise that filling machine (1), hydraulic piston type natural gas compressor (2) and at least three group CNG that are arranged on the trailer (13) add the gas cylinder group; Hydraulic piston type natural gas compressor (2) has an input interface (21) and an output interface (22); It is characterized in that: said many group CNG add in the gas cylinder group, have one group to be bomb group (3), and all the other each groups are for getting gas cylinder group (4); Bomb group (3) has a high-voltage output end (31) and a high voltage input terminal (32), and high-voltage output end (31) is connected with filling machine (1), and high voltage input terminal (32) is connected with the output interface (22) of hydraulic piston type natural gas compressor (2); Get gas cylinder group (4) and have a gas output end (41), the gas output end (41) of getting gas cylinder group (4) is connected with the input interface (21) of hydraulic piston type natural gas compressor (2).
2. a kind of CNG air entraining substation according to claim 1 is characterized in that: also include automatic control system, automatic control system passes device (8) by PLC module (5), touch screen (6), pneumatic ball valve (7) and pressure and constitutes; Pressure transducer (8) has two, is installed in respectively on the output interface (22) and input interface (21) of hydraulic piston type natural gas compressor (2), and its signal output part is connected with PLC module (5); Pneumatic ball valve (7) contains air-operated solenoid valve (71); The high-voltage output end (31) of bomb group (3) and high voltage input terminal (32) go up and get on the gas output end (41) of gas cylinder group (4) described pneumatic ball valve (7) is installed respectively, and the guide line of the air-operated solenoid valve (71) of each pneumatic ball valve (7) all is connected with PLC module (5); The signal output part of touch screen (6) is connected with PLC module (5).
3. a kind of CNG air entraining substation according to claim 2; It is characterized in that: the output terminal that the gas output end (41) that said many groups are got gas cylinder group (4) is gone up the pneumatic ball valve of installing (7) collects on the export pipeline (9), and the gas output end (41) of each air cylinder group (4) is connected with the input interface (21) of hydraulic piston type natural gas compressor (2) through export pipeline (9).
4. a kind of CNG air entraining substation according to claim 3; It is characterized in that: on export pipeline (9), also have a delivery outlet (91); This delivery outlet (91) is connected with filling machine (1), and the high-voltage output end (31) of bomb group (3) is connected with filling machine (1) through delivery outlet (91).
5. a kind of CNG air entraining substation according to claim 3; It is characterized in that: get gas cylinder group (4) for every group and also all have a gas input end (42); Described pneumatic ball valve (7) also all is installed on the said gas input end (42); The input end of said pneumatic ball valve (7) collects on the intake pipeline (10); The input end of intake pipeline (10) is connected with the output interface (22) of hydraulic piston type natural gas compressor (2), and the high voltage input terminal (32) of bomb group (3) is connected with the output interface (22) of hydraulic piston type natural gas compressor (2) through intake pipeline (10), and the guide line of the air-operated solenoid valve (71) of pneumatic ball valve (7) all is connected with PLC module (5).
6. a kind of CNG air entraining substation according to claim 5 is characterized in that: on intake pipeline (10), also have a high pressure output interface (101), this high pressure output interface (101) is connected with filling machine (1).
7. a kind of CNG air entraining substation according to claim 5; It is characterized in that: on the intake pipeline (10) between high pressure output interface (101) and the output interface, and on the export pipeline (10) between delivery outlet (91) and the input interface (21), be separately installed with manual ball valve (11).
8. according to claim 1,2,3,4,5,6 or 7 described a kind of CNG air entraining substations, it is characterized in that: every group of CNG adds the gas cylinder group and comprises at least two long tube steel cylinders (12), and each described CNG air entraining substation comprises that four to five groups of described CNG add the gas cylinder group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204432379U CN202302731U (en) | 2011-11-10 | 2011-11-10 | CNG (compressed natural gas) filling substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204432379U CN202302731U (en) | 2011-11-10 | 2011-11-10 | CNG (compressed natural gas) filling substation |
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| Publication Number | Publication Date |
|---|---|
| CN202302731U true CN202302731U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204432379U Expired - Fee Related CN202302731U (en) | 2011-11-10 | 2011-11-10 | CNG (compressed natural gas) filling substation |
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| Country | Link |
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| CN (1) | CN202302731U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506301A (en) * | 2011-11-10 | 2012-06-20 | 四川金科环保科技有限公司 | Compressed natural gas (CNG) secondary fueling station |
-
2011
- 2011-11-10 CN CN2011204432379U patent/CN202302731U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506301A (en) * | 2011-11-10 | 2012-06-20 | 四川金科环保科技有限公司 | Compressed natural gas (CNG) secondary fueling station |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20171110 |
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| CF01 | Termination of patent right due to non-payment of annual fee |