CN104989955A - Method used to stabilize CNG high-flow air feed - Google Patents
Method used to stabilize CNG high-flow air feed Download PDFInfo
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Abstract
The invention relates to a method used to stabilize CNG high-flow air feed. A device comprises a collecting pipeline used to collect natural gas released by each tank car. The collecting pipeline comprises a main pipe and branch pipes arranged on the main pipe. The air inflow end of each branch pipe is respectively connected with the air outlet of the tank car. The air outlet end of the main pipe is provided with a main pipe pressure measuring device and a flow measuring device. Each branch pipe is respectively provided with an automatic control valve. The pipe body of each branch pipe between the automatic control valve and the tank car is respectively provided with a branch pipe pressure measuring device. A control device receives signals acquired by the branch pipe pressure measuring devices, the main pipe pressure measuring devices, and the flow measuring device, and analyzes and processes the signals and regulates on-off state of each automatic control valve according to analysis results. In the above technical scheme, the control device regulates on-off state of each automatic control valve, so that the output end of the main pipe can stably provide high-flow air feed, and high-flow air feed requirements of users are satisfied.
Description
Technical field
Invention relates to CNG air feed equipment field, is specifically related to a kind of method for stable CNG large discharge air feed.
Background technique
The region that the defeated business of current domestic natural gas pipe does not cover, if user is when using compressed natural gas to carry out large discharge (1.0 ~ 1.5 ten thousand side) air feed, generally need to set up large-scale gas storage facility (as large-size spherical tank) and carry out buffering air feed, in order to ensure stable air feed; But the cost of large-scale gas storage facility is high and floor space large, therefore, is necessary to provide a kind of scheme not needing to adopt large-scale gas storage facility and Absorbable organic halogens air feed.
Summary of the invention
The object of invention is just to provide a kind of method for stable CNG large discharge air feed, and it can adopt large-scale gas storage facility and Absorbable organic halogens CNG large discharge air feed.
For achieving the above object, invention have employed following technological scheme:
A kind of method for stable CNG large discharge air feed, it is characterized in that: what comprise the rock gas for gathering the release of each tank car gathers pipeline, gather pipeline and comprise supervisor and the upper each arm arranged of supervisor, the inlet end of each arm is connected with the air outlet of tank car respectively, the outlet side of supervisor is provided with main pipe pressure measuring device and flow measuring device, each arm is respectively arranged with internally piloted valve, each arm pipe shaft between internally piloted valve to tank car is respectively arranged with arm manometer, control gear receives arm manometer, the signal of main pipe pressure measuring device and flow measuring device collection carries out analysing and processing and regulates and controls the open/close states of each internally piloted valve according to the result analyzed.
In technique scheme, regulated and controled the open/close states of each internally piloted valve by control gear, make supervisor's output terminal can stablize the air feed providing large discharge, meet the large discharge air feed demand of user.
Accompanying drawing explanation
Fig. 1 is the structural representation of invention.
Embodiment
In order to the object and advantage that make invention are clearly understood, below in conjunction with embodiment, invention is specifically described.Should be appreciated that following word only in order to describe one or more concrete mode of executions of invention, considered critical is not carried out to the protection domain of the concrete request of invention.
The technological scheme that invention is taked as shown in Figure 1, a kind of equipment for stable CNG large discharge air feed, what comprise the rock gas for gathering the release of each tank car gathers pipeline, gather pipeline and comprise each arm 20 that supervisor 10 and supervisor 10 are arranged, the inlet end of each arm 20 is connected with the air outlet of tank car 30 respectively, the outlet side of supervisor 10 is provided with main pipe pressure measuring device and flow measuring device 12, each arm 20 is respectively arranged with internally piloted valve 21, each arm 20 pipe shaft between internally piloted valve 21 to tank car 30 is respectively arranged with arm manometer 22, control gear receives arm manometer 22, the signal that main pipe pressure measuring device 11 and flow measuring device 12 gather carries out analysing and processing and regulates and controls the open/close states of each internally piloted valve 21 according to the result analyzed.
Scheme is specifically: the outlet side of supervisor 10 is also provided with temperature measuring equipment 13, and temperature measuring equipment can be PT100 type temperature transducer, specifically can select model: the temperature transducer of PT100N1C150mmM05E; Main pipe pressure measuring device 11 can be AST pressure transducer, specifically can select the pressure transducer of model AST47FMT00006B4I1000; Flow measuring device 12 can be LUXQ type flow transducer, and model specifically can be selected to be the flow transducer of LUXQ-Z2B050-10.0-CB1.5; Arm manometer 22 can be AST pressure transducer, and model specifically can be selected to be the pressure transducer of AST4300H00400B417000; Internally piloted valve 21 can be SEITZ type solenoid valve, and model specifically can be selected to be the solenoid valve of SEITZ 3030.
Control gear can be PLC process control machine and industry control upper-position unit is formed.The signal that arm manometer 22, main pipe pressure measuring device 11 and flow measuring device 12 gather enters PLC and compares, and is assigned strengthen or reduce the open degree that SC sigmal control regulates each internally piloted valve 21 by PLC.If supervisor's 10 flows and pressure all reach setting value, then each internally piloted valve 21 does not carry out action; If supervisor's 10 flows and pressure are less than setting value, then increase the open degree of internally piloted valve 21; If supervisor's 10 flows and pressure are greater than setting value, then reduce the open degree of internally piloted valve 21, enter equilibrium stage until consistent with setting value.If under the prerequisite of supervisor 10 flow, pressure stability, when tank car 30 pressure that Ruo You mono-road arm manometer 22 records is lower than setting value, the open degree that at this moment will increase this road internally piloted valve 21 according to programming exports in order to the flow increasing this road, and the open degree that the high loop of other pressure can be regulated to reduce internally piloted valve 21 according to total discharge with time-control apparatus exports in order to keep the pressure stability of supervisor 10.
Be described in detail for the controlling method of redundancy to invention with four-function four below, supervisor 10 arranges 8 arms 20, each arm 20 is arranged respectively internally piloted valve 21 and arm manometer 22, PLC process control machine four, industry control upper-position unit one, redundancy one and relevant corollary equipment.
Controlling method specifically comprises the steps:
8 arms are designated as 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h respectively, and the tank car gas cylinder that 8 arms connect respectively is designated as a, b, c, d, e, f, g, h respectively; The arm manometer 22 that 8 arms are arranged is designated as 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h respectively; The internally piloted valve 21 that 8 arms are arranged is designated as 21a, 21b, 21c, 21d, 21e, 21f, 21g, 21h respectively;
Step 1: open internally piloted valve 21a, 21b, 21c, 21d, control gear regulates the open degree of internally piloted valve 21a, 21b, 21c, 21d to be respectively a3%, b2%, c1%, d%, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), a3 > b2 > c1 > d;
If P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21a, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), (k1, k2) is the pressure range of supervisor's setting;
If P
main< k1 and the open degree of internally piloted valve 21a is 100%; Then control gear regulates internally piloted valve 21b, 21c, 21d to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21b, 21c, 21d increase open degree is: internally piloted valve 21b has precedence over internally piloted valve 21c, and internally piloted valve 21c has precedence over internally piloted valve 21d;
If the pressure P that arm manometer 22a records
aduring < k3, then control gear regulation and control internally piloted valve 21a closes and regulation and control internally piloted valve 21e unlatching, now the open degree of internally piloted valve 21b, 21c, 21d, 21e is respectively b3%, c2%, d1%, e%, the tank car gas cylinder that arm 20a more renews connects, k3 is the force value changing tank car gas cylinder, b3% > c2% > d1% > e%;
Step 2: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21b, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21b is 100%; Then control gear regulates internally piloted valve 21c, 21d, 21e to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21c, 21d, 21e increase open degree is: internally piloted valve 21c has precedence over internally piloted valve 21d, and internally piloted valve 21d has precedence over internally piloted valve 21e;
If the pressure P that arm manometer 22b records
bduring < k3, then control gear regulation and control internally piloted valve 21b closes and regulation and control internally piloted valve 21f unlatching, now the open degree of internally piloted valve 21c, 21d, 21e, 21f is respectively c3%, d2%, e1%, f%, the tank car gas cylinder that arm 20b more renews connects, c3% > d2% > e1% > f%;
Step 3: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21c, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21c is 100%; Then control gear regulates internally piloted valve 21d, 21e, 21f to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21d, 21e, 21f increase open degree is: internally piloted valve 21d has precedence over internally piloted valve 21e, and internally piloted valve 21e has precedence over internally piloted valve 21f;
If the pressure P that arm manometer 22c records
cduring < k3, then control gear regulation and control internally piloted valve 21c closes and regulation and control internally piloted valve 21g unlatching, now the open degree of internally piloted valve 21d, 21e, 21f, 21g is respectively d3%, e2%, f1%, g%, the tank car gas cylinder that arm 20c more renews connects, d3% > e2% > f1% > g%;
Step 4: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21d, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21d is 100%; Then control gear regulates internally piloted valve 21e, 21f, 21g to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21e, 21f, 21g increase open degree is: internally piloted valve 21e has precedence over internally piloted valve 21f, and internally piloted valve 21f has precedence over internally piloted valve 21g;
If the pressure P that arm manometer 22d records
dduring < k3, then control gear regulation and control internally piloted valve 21d closes and regulation and control internally piloted valve 21h unlatching, now the open degree of internally piloted valve 21e, 21f, 21g, 21h is respectively e3%, f2%, g1%, h%, the tank car gas cylinder that arm 20d more renews connects, e3% > f2% > g1% > h%;
Step 5: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21e, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21e is 100%; Then control gear regulates internally piloted valve 21f, 21g, 21h to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21f, 21g, 21h increase open degree is: internally piloted valve 21f has precedence over internally piloted valve 21g, and internally piloted valve 21g has precedence over internally piloted valve 21h;
If the pressure P that arm manometer 22e records
eduring < k3, then control gear regulation and control internally piloted valve 21e closes and regulation and control internally piloted valve 21a unlatching, now the open degree of internally piloted valve 21f, 21g, 21h, 21a is respectively f3%, g2%, h1%, a%, the tank car gas cylinder that arm 20e more renews connects, f3% > g2% > h1% > a%;
Step 6: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21f, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21f is 100%; Then control gear regulates internally piloted valve 21g, 21h, 21a to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21g, 21h, 21a increase open degree is: internally piloted valve 21g has precedence over internally piloted valve 21h, and internally piloted valve 21h has precedence over internally piloted valve 21a;
If the pressure P that arm manometer 22f records
fduring < k3, then control gear regulation and control internally piloted valve 21f closes and regulation and control internally piloted valve 21b unlatching, now the open degree of internally piloted valve 21g, 21h, 21a, 21b is respectively g3%, h2%, a1%, b%, the tank car gas cylinder that arm 20f more renews connects, g3% > h2% > a1% > b%;
Step 7: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21g, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21g is 100%; Then control gear regulates internally piloted valve 21h, 21a, 21b to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21h, 21a, 21b increase open degree is: internally piloted valve 21h has precedence over internally piloted valve 21a, and internally piloted valve 21a has precedence over internally piloted valve 21b;
If the pressure P that arm manometer 22g records
gduring < k3, then control gear regulation and control internally piloted valve 21g closes and regulation and control internally piloted valve 21c unlatching, now the open degree of internally piloted valve 21h, 21a, 21b, 21c is respectively h3%, a2%, b1%, c%, the tank car gas cylinder that arm 20g more renews connects, h3% > a2% > b1% > c%;
Step 8: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21h, make the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21h is 100%; Then control gear regulates internally piloted valve 21a, 21b, 21c to increase open degree, makes the pressure signal P that main pipe pressure measuring device 11 records
main∈ (k1, k2), the order that internally piloted valve 21a, 21b, 21c increase open degree is: internally piloted valve 21a has precedence over internally piloted valve 21b, and internally piloted valve 21b has precedence over internally piloted valve 21c;
If the pressure P that arm manometer 22h records
hduring < k3, then control gear regulation and control internally piloted valve 21h closes and regulation and control internally piloted valve 21d unlatching, now the open degree of internally piloted valve 21a, 21b, 21c, 21d is respectively a3%, b2%, c1%, d%, and the tank car gas cylinder that arm 20h more renews connects;
Control gear is cycled to repeat the control manipulation performing above-mentioned steps 1 ~ step 8, wherein a3 > a2 > a1 > a; B3 > b2 > b1 > b; C3 > c2 > c1 > c; D3 > d2 > d1 > d; E3 > e2 > e1 > e; F3 > f2 > f1 > f; G3 > g2 > g1 > g; H3 > h2 > h1 > h; G3 > g2 > g1 > g.
During specific operation: k1=0.25MPa; K2=0.3MPa; K3=0.5MPa.
The regulable control of concrete each internally piloted valve is as shown in table 1, P
mainduring > k2, process control machine preferentially turns down the corresponding internally piloted valve of the highest tank car of pressure automatically; Whole system tank car ordering in launching is from low pressure to high pressure, and the order of excision is from high pressure to low pressure.Said procedure is by programming language into control device.
Table 1 is the adjustment state table of control gear to each internally piloted valve
In table 1 :-representing closed condition, * % represents the open degree of the valve of automatic control, and 100% represents that automatic control is opened completely.
In a word, invention can carry out stable CNG large discharge air feed when not arranging large-scale gas storage facility.
The above is only the preferred implementation of invention; should be understood that; for those skilled in the art; to know in invention after contents; under the prerequisite not departing from inventive principle; can also make some equal conversion to it and substitute, these convert and substitute the protection domain that also should be considered as belonging to invention on an equal basis.
Claims (2)
1. the method for stable CNG large discharge air feed, it is characterized in that: what comprise the rock gas for gathering the release of each tank car gathers pipeline, gather pipeline and comprise supervisor and the upper each arm arranged of supervisor, the inlet end of each arm is connected with the air outlet of tank car respectively, the outlet side of supervisor is provided with main pipe pressure measuring device and flow measuring device, each arm is respectively arranged with internally piloted valve, each arm pipe shaft between internally piloted valve to tank car is respectively arranged with arm manometer, control gear receives arm manometer, the signal of main pipe pressure measuring device and flow measuring device collection carries out analysing and processing and regulates and controls the open/close states of each internally piloted valve according to the result analyzed,
Supervisor is arranged 8 arms 20, each arm 20 is arranged respectively internally piloted valve and arm manometer; 8 arms are designated as 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h respectively, and the arm manometer that 8 arms are arranged is designated as 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h respectively; The internally piloted valve that 8 arms are arranged is designated as 21a, 21b, 21c, 21d, 21e, 21f, 21g, 21h respectively;
Control gear takes following method to control:
Step 1: open internally piloted valve 21a, 21b, 21c, 21d, control gear regulates the open degree of internally piloted valve 21a, 21b, 21c, 21d to be respectively a3%, b2%, c1%, d%, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), a3 > b2 > c1 > d;
If P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21a, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), (k1, k2) is the pressure range of supervisor's setting;
If P
main< k1 and the open degree of internally piloted valve 21a is 100%; Then control gear regulates internally piloted valve 21b, 21c, 21d to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21b, 21c, 21d increase open degree is: internally piloted valve 21b has precedence over internally piloted valve 21c, and internally piloted valve 21c has precedence over internally piloted valve 21d;
If the pressure P that arm manometer 22a records
aduring < k3, then control gear regulation and control internally piloted valve 21a closes and regulation and control internally piloted valve 21e unlatching, now the open degree of internally piloted valve 21b, 21c, 21d, 21e is respectively b3%, c2%, d1%, e%, the tank car gas cylinder that arm 20a more renews connects, k3 is the force value changing tank car gas cylinder, b3% > c2% > d1% > e%;
Step 2: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21b, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21b is 100%; Then control gear regulates internally piloted valve 21c, 21d, 21e to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21c, 21d, 21e increase open degree is: internally piloted valve 21c has precedence over internally piloted valve 21d, and internally piloted valve 21d has precedence over internally piloted valve 21e;
If the pressure P that arm manometer 22b records
bduring < k3, then control gear regulation and control internally piloted valve 21b closes and regulation and control internally piloted valve 21f unlatching, now the open degree of internally piloted valve 21c, 21d, 21e, 21f is respectively c3%, d2%, e1%, f%, the tank car gas cylinder that arm 20b more renews connects, c3% > d2% > e1% > f%;
Step 3: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21c, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21c is 100%; Then control gear regulates internally piloted valve 21d, 21e, 21f to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21d, 21e, 21f increase open degree is: internally piloted valve 21d has precedence over internally piloted valve 21e, and internally piloted valve 21e has precedence over internally piloted valve 21f;
If the pressure P that arm manometer 22c records
cduring < k3, then control gear regulation and control internally piloted valve 21c closes and regulation and control internally piloted valve 21g unlatching, now the open degree of internally piloted valve 21d, 21e, 21f, 21g is respectively d3%, e2%, f1%, g%, the tank car gas cylinder that arm 20c more renews connects, d3% > e2% > f1% > g%;
Step 4: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21d, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21d is 100%; Then control gear regulates internally piloted valve 21e, 21f, 21g to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21e, 21f, 21g increase open degree is: internally piloted valve 21e has precedence over internally piloted valve 21f, and internally piloted valve 21f has precedence over internally piloted valve 21g;
If the pressure P that arm manometer 22d records
dduring < k3, then control gear regulation and control internally piloted valve 21d closes and regulation and control internally piloted valve 21h unlatching, now the open degree of internally piloted valve 21e, 21f, 21g, 21h is respectively e3%, f2%, g1%, h%, the tank car gas cylinder that arm 20d more renews connects, e3% > f2% > g1% > h%;
Step 5: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21e, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21e is 100%; Then control gear regulates internally piloted valve 21f, 21g, 21h to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21f, 21g, 21h increase open degree is: internally piloted valve 21f has precedence over internally piloted valve 21g, and internally piloted valve 21g has precedence over internally piloted valve 21h;
If the pressure P that arm manometer 22e records
eduring < k3, then control gear regulation and control internally piloted valve 21e closes and regulation and control internally piloted valve 21a unlatching, now the open degree of internally piloted valve 21f, 21g, 21h, 21a is respectively f3%, g2%, h1%, a%, the tank car gas cylinder that arm 20e more renews connects, f3% > g2% > h1% > a%;
Step 6: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21f, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21f is 100%; Then control gear regulates internally piloted valve 21g, 21h, 21a to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21g, 21h, 21a increase open degree is: internally piloted valve 21g has precedence over internally piloted valve 21h, and internally piloted valve 21h has precedence over internally piloted valve 21a;
If the pressure P that arm manometer 22f records
fduring < k3, then control gear regulation and control internally piloted valve 21f closes and regulation and control internally piloted valve 21b unlatching, now the open degree of internally piloted valve 21g, 21h, 21a, 21b is respectively g3%, h2%, a1%, b%, the tank car gas cylinder that arm 20f more renews connects, g3% > h2% > a1% > b%;
Step 7: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21g, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21g is 100%; Then control gear regulates internally piloted valve 21h, 21a, 21b to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21h, 21a, 21b increase open degree is: internally piloted valve 21h has precedence over internally piloted valve 21a, and internally piloted valve 21a has precedence over internally piloted valve 21b;
If the pressure P that arm manometer 22g records
gduring < k3, then control gear regulation and control internally piloted valve 21g closes and regulation and control internally piloted valve 21c unlatching, now the open degree of internally piloted valve 21h, 21a, 21b, 21c is respectively h3%, a2%, b1%, c%, the tank car gas cylinder that arm 20g more renews connects, h3% > a2% > b1% > c%;
Step 8: if P
main< k1, then control gear regulation and control increase the open degree of internally piloted valve 21h, make the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2);
If P
main< k1 and the open degree of internally piloted valve 21h is 100%; Then control gear regulates internally piloted valve 21a, 21b, 21c to increase open degree, makes the pressure signal P that main pipe pressure measuring device records
main∈ (k1, k2), the order that internally piloted valve 21a, 21b, 21c increase open degree is: internally piloted valve 21a has precedence over internally piloted valve 21b, and internally piloted valve 21b has precedence over internally piloted valve 21c;
If the pressure P that arm manometer 22h records
hduring < k3, then control gear regulation and control internally piloted valve 21h closes and regulation and control internally piloted valve 21d unlatching, now the open degree of internally piloted valve 21a, 21b, 21c, 21d is respectively a3%, b2%, c1%, d%, and the tank car gas cylinder that arm 20h more renews connects;
Control gear is cycled to repeat the control manipulation performing above-mentioned steps 1 ~ step 8, wherein a3 > a2 > a1 > a; B3 > b2 > b1 > b; C3 > c2 > c1 > c; D3 > d2 > d1 > d; E3 > e2 > e1 > e; F3 > f2 > f1 > f; G3 > g2 > g1 > g; H3 > h2 > h1 > h; G3 > g2 > g1 > g.
2. the method for stable CNG large discharge air feed according to claim 1, is characterized in that: k1=0.25MPa, k2=0.3MPa, k3=0.5MPa.
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| CN107388032A (en) * | 2017-07-04 | 2017-11-24 | 大连理工大学 | A kind of regulation and control method of the in stable condition flow of liquid nitrogen injection |
| CN109695824A (en) * | 2019-03-06 | 2019-04-30 | 上海洁维生物工程有限公司 | Valve array structure and pharmaceutical system applying same |
| CN110953482A (en) * | 2019-12-16 | 2020-04-03 | 云南云铝海鑫铝业有限公司 | Air pipe system for maintenance of aluminum electrolysis workshop without stopping air |
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| JPH07269799A (en) * | 1994-03-26 | 1995-10-20 | Masanori Sakakibara | Maximum flow amount restricting device |
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| CN107388032A (en) * | 2017-07-04 | 2017-11-24 | 大连理工大学 | A kind of regulation and control method of the in stable condition flow of liquid nitrogen injection |
| CN109695824A (en) * | 2019-03-06 | 2019-04-30 | 上海洁维生物工程有限公司 | Valve array structure and pharmaceutical system applying same |
| CN110953482A (en) * | 2019-12-16 | 2020-04-03 | 云南云铝海鑫铝业有限公司 | Air pipe system for maintenance of aluminum electrolysis workshop without stopping air |
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| CN104989955B (en) | 2017-05-31 |
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