CN204347191U - A kind of intrinsic safety ternary gas distribution pilot system - Google Patents
A kind of intrinsic safety ternary gas distribution pilot system Download PDFInfo
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- CN204347191U CN204347191U CN201420788509.2U CN201420788509U CN204347191U CN 204347191 U CN204347191 U CN 204347191U CN 201420788509 U CN201420788509 U CN 201420788509U CN 204347191 U CN204347191 U CN 204347191U
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Abstract
A kind of intrinsic safety ternary gas distribution of the utility model pilot system, comprises air-source air feeding device, air distributing device, PLC electric control system and test flume; Air distributing device comprises stand, be arranged on control desk on stand and gas mixer; Gas mixer is provided with 3 air intake openings and a gas outlet, and three air intake openings are respectively air inlet, oxygen air intake opening and combustible gas air intake opening; Three air intake openings are connected with air-source air feeding device respectively by pipeline, and air-source air feeding device is disposed with ball valve, pressure maintaining valve, pneumatic control valve, metered flow variable valve and mass flowmeter to every bar pipeline of air intake opening; Test flume is arranged on the rear of gas mixer gas outlet and is connected with gas mixer gas outlet, and the endpiece of test flume is provided with a ball valve; PLC electric control system is for controlling the opening and closing of pneumatic control valve.The utility model can realize real-time monitoring concentration simultaneously, and precision preparation is ± 0.3%, and have developed the ternary gas distribution method of collection hydrogen, oxygen, air, and the detection means for intrinsic safe explosion-proof product adds new means.
Description
Technical field
The utility model relates to distribution pilot system, particularly a kind of intrinsic safety ternary gas distribution pilot system.
Background technology
A very long time, the air distributing device of domestic used spark test apparatus is all point platen press used, namely in advance configure mixed gas needed for test according to volume proportion, be then stored in speciality container, when testing just by vacuum pump mixed gas suction test flume in order to test.Along with the development of science and technology, the lower method of this distributing precision gradually replace by new air distributing method.Along with the revision of GB3836.4-2010 (being equal to IEC 60079-11:2006), a lot of testing agency both domestic and external all have developed new air distributing device: namely according to required test gas concentration, by controlled pressure and flow, realize the real-time proportioning of gas concentration.The new method of testing that in GB3836.4-2010, table 8 proposes, namely uses the explosive gas mixture being equivalent to 1.5 times of safety coefficient to do experiment, thus replaces original more loaded down with trivial details needing the method for testing increasing by 1.5 times of safety coefficient in circuit.The proposition of this method obtains making test more convenient, so domestic adopt is tested in this way.And the mixed gas being equivalent to 1.5 times of safety coefficient used for II C rank circuit proposed in table 8 is formed by 3 kinds of gas and vapor permeation, this has higher requirement to the gas distributing system of intrinsic safety spark test apparatus.
Common intrinsic safety test unit only can realize the mixed configuration of two kinds of gases, and poor to the precision controlling of the matched proportion density of test gas, the function that can't realize adjusting in real time concentration had, and all can have larger impact to the efficiency tested and test findings.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of a kind of intrinsic safety ternary gas distribution pilot system that simultaneously can realize real-time monitoring concentration.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of intrinsic safety ternary gas distribution pilot system, the test flume comprising air-source air feeding device, the air distributing device be connected with air-source air feeding device, PLC electric control system and be connected with air distributing device, is provided with air source of the gas, combustible gas source of the gas and oxygen source in described air-source air feeding device; Described air distributing device comprises stand, be arranged on control desk on stand and gas mixer;
Described gas mixer is provided with 3 air intake openings and a gas outlet, and described three air intake openings are respectively air inlet, oxygen air intake opening and combustible gas air intake opening; Described three air intake openings are connected with air-source air feeding device respectively by pipeline, and described air-source air feeding device is disposed with ball valve, pressure maintaining valve, pneumatic control valve, metered flow variable valve and mass flowmeter to every bar pipeline of air intake opening;
Described test flume is arranged on the rear of gas mixer gas outlet and is connected with gas mixer gas outlet, and the endpiece of test flume is provided with a ball valve;
Described PLC electric control system is for controlling the opening and closing of pneumatic control valve.
In an embodiment of the present utility model, described intrinsic safety ternary gas distribution pilot system also comprises the combustible gas analyzer and oxygen analyser that are arranged on gas mixer gas outlet.
In an embodiment of the present utility model, described air-source air feeding device comprises the air source of the gas tank, combustible gas source of the gas tank and the oxygen source tank that hold air source of the gas, combustible gas source of the gas and oxygen source.
In an embodiment of the present utility model, described intrinsic safety ternary gas distribution pilot system also comprises a pilot solenoid valve, and described pilot solenoid valve is connected with PLC electric control system.
By technique scheme, the beneficial effects of the utility model are:
The utility model can realize real-time monitoring concentration simultaneously, and precision preparation is ± 0.3%, and have developed the ternary gas distribution method of collection hydrogen, oxygen, air, and the detection means for intrinsic safe explosion-proof product adds new means.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the utility model system construction drawing;
Fig. 2 is gas mixer fundamental diagram;
Numeral and the corresponding component title represented by letter in figure:
10, air-source air feeding device 11, air source of the gas tank 12, combustible gas source of the gas tank 13, oxygen source tank 20, gas mixer 30, PLC electric control system 40, test flume 50, ball valve 60, pressure maintaining valve 70, pneumatic control valve 80, metered flow variable valve 90, mass flowmeter 100, combustible gas analyzer 110, oxygen analyser 120, pilot solenoid valve.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
Shown in Figure 1, the utility model discloses a kind of intrinsic safety ternary gas distribution pilot system, the test flume 40 comprising air-source air feeding device 10, the air distributing device be connected with air-source air feeding device 10, PLC electric control system 30 and be connected with air distributing device, is provided with air source of the gas, combustible gas source of the gas and oxygen source in air-source air feeding device 10; Air distributing device comprises stand, be arranged on control desk on stand and gas mixer 20.
The utility model gas mixer 20 is provided with three air intake openings and a gas outlet, and three air intake openings are respectively air inlet, oxygen air intake opening and combustible gas air intake opening; Three air intake openings are connected with air-source air feeding device 10 respectively by pipeline, and air-source air feeding device 10 comprises the air source of the gas tank 11, combustible gas source of the gas tank 12 and the oxygen source tank 13 that hold air source of the gas, combustible gas source of the gas and oxygen source; Air-source air feeding device is disposed with ball valve 50, pressure maintaining valve 60, pneumatic control valve 70, metered flow variable valve 80 and mass flowmeter 90 to every bar pipeline of three air intake openings; Every bar pipeline all uses pressure maintaining valve source of the gas is inputted synchronous, use metered flow variable valve simultaneously, realize concentration deviation and overflow and automatically regulate; Two yuan, the real-time configuration of ternary gas can be realized simultaneously.
Test flume 40 is arranged on the rear of gas mixer gas outlet and is connected with gas mixer gas outlet, and the endpiece of test flume 40 is provided with a ball valve 50; PLC electric control system is for controlling the opening and closing of pneumatic control valve.
The utility model intrinsic safety ternary gas distribution pilot system also comprises the combustible gas analyzer 100 and oxygen analyser 110 that are arranged on gas mixer gas outlet; Have employed the matched proportion density that inflammable gas prover and oxygen analyser carry out gas ingredients in simultaneous display mixed gas, and on table top, be provided with gas Mini-adjustable valve, for real-time monitoring gas concentration.
Shown in Figure 2, the utility model gas mixer 20 adopts tangential direction air inlet, the structure of axial throttling and diffusion; Tangential direction air inlet allows gas enter after mixer can fast rotational, and increase the stirring of gas, it is fiercer to stir, and mixes more even, and diffusion impels gas to mix further by dissipation method.
The utility model intrinsic safety ternary gas distribution pilot system also comprises a pilot solenoid valve 120, and pilot solenoid valve 120 is connected with PLC electric control system 30.
The utility model intrinsic safety ternary gas distribution pilot system also comprises an essential safety spark-testing operator's console (not marking in figure), operator's console just PLC controls, adopt more reliable solenoid valve and gear train assembly, misoperation is obviously reduced, raise the efficiency, and realize the communication with PC, the process of the test of display in real time.Also retain Non-follow control function, realize panel operation, display, Non-follow control, process of the test is revealed in computer interface in real time, clear, directly perceived, realizes the sweetly disposition to final test result simultaneously simultaneously.
The key problem in technology of this device how to control mixing ratio error, and make gas and vapor permeation even; Gas and vapor permeation is evenly ensured by the structure of gas mixer; The principle controlling mixing ratio error is as follows:
In examination: r-proportion
U-coefficient of flow
The circulation area at f-valve throttle place
G-acceleration of gravity
R-gas law constant
T-gas flows into temperature during valve
P1-valve inlet pressure
P2-valve export pressure
Controlling proportioning, is exactly in fact control volume flow ratio; Known by flow formula, r, R, g, u are constants, and when valve opening is constant, F is also constant; T changes with environment temperature and gas spread condition, and because pipeline, valve are installed concentratedly, therefore the change of environment temperature is consistent, because medium is different, flow velocity is different, may cause spread condition difference to some extent, temperature variation is a bit inconsistent, but is more or less the same; Therefore the change of T value can be thought synchronous, if therefore energy regulating and controlling valve intake pressure P1 and outlet P2 Simultaneous Pressure, just volume flow ratio can be controlled, this device have employed four pressure maintaining valves and achieves above-mentioned requirements, variable valve pressure P 1 basic synchronization in system can be made, and inlet outlet pressure differential P1-P2 controls in allowed band, therefore the aperture of variable valve, change its circulation area, rely on inflammable gas prover to demonstrate the reading of main gas mixing ratio concentration, just can prepare required mixed gas continuously.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. an intrinsic safety ternary gas distribution pilot system, the test flume comprising air-source air feeding device, the air distributing device be connected with air-source air feeding device, PLC electric control system and be connected with air distributing device, is provided with air source of the gas, combustible gas source of the gas and oxygen source in described air-source air feeding device; It is characterized in that, described air distributing device comprises stand, be arranged on control desk on stand and gas mixer;
Described gas mixer is provided with 3 air intake openings and a gas outlet, and described three air intake openings are respectively air inlet, oxygen air intake opening and combustible gas air intake opening; Described three air intake openings are connected with air-source air feeding device respectively by pipeline, and described air-source air feeding device is disposed with ball valve, pressure maintaining valve, pneumatic control valve, metered flow variable valve and mass flowmeter to every bar pipeline of air intake opening;
Described test flume is arranged on the rear of gas mixer gas outlet and is connected with gas mixer gas outlet, and the endpiece of test flume is provided with a ball valve;
Described PLC electric control system is for controlling the opening and closing of pneumatic control valve.
2. a kind of intrinsic safety ternary gas distribution pilot system according to claim 1, is characterized in that, described intrinsic safety ternary gas distribution pilot system also comprises the combustible gas analyzer and oxygen analyser that are arranged on gas mixer gas outlet.
3. a kind of intrinsic safety ternary gas distribution pilot system according to claim 1, is characterized in that, described air-source air feeding device comprises the air source of the gas tank, combustible gas source of the gas tank and the oxygen source tank that hold air source of the gas, combustible gas source of the gas and oxygen source.
4. a kind of intrinsic safety ternary gas distribution pilot system according to claim 1, is characterized in that, described intrinsic safety ternary gas distribution pilot system also comprises a pilot solenoid valve, and described pilot solenoid valve is connected with PLC electric control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788509.2U CN204347191U (en) | 2014-12-12 | 2014-12-12 | A kind of intrinsic safety ternary gas distribution pilot system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788509.2U CN204347191U (en) | 2014-12-12 | 2014-12-12 | A kind of intrinsic safety ternary gas distribution pilot system |
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| Publication Number | Publication Date |
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| CN204347191U true CN204347191U (en) | 2015-05-20 |
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| CN201420788509.2U Expired - Fee Related CN204347191U (en) | 2014-12-12 | 2014-12-12 | A kind of intrinsic safety ternary gas distribution pilot system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352825A (en) * | 2015-11-27 | 2016-02-24 | 中国人民解放军理工大学 | Test device for closed tank dynamic response under action of combustible gas explosion |
| CN105606771A (en) * | 2016-01-30 | 2016-05-25 | 北京理工大学 | Full-automatic gas distribution system and manner for constant-volume premixed gas experiment |
| CN106064026A (en) * | 2016-07-26 | 2016-11-02 | 液化空气（中国）研发有限公司 | Multicomponent gas mixing system |
-
2014
- 2014-12-12 CN CN201420788509.2U patent/CN204347191U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352825A (en) * | 2015-11-27 | 2016-02-24 | 中国人民解放军理工大学 | Test device for closed tank dynamic response under action of combustible gas explosion |
| CN105606771A (en) * | 2016-01-30 | 2016-05-25 | 北京理工大学 | Full-automatic gas distribution system and manner for constant-volume premixed gas experiment |
| CN105606771B (en) * | 2016-01-30 | 2017-04-26 | 北京理工大学 | Full-automatic gas distribution system and manner for constant-volume premixed gas experiment |
| CN106064026A (en) * | 2016-07-26 | 2016-11-02 | 液化空气（中国）研发有限公司 | Multicomponent gas mixing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150520 Termination date: 20171212 |
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| CF01 | Termination of patent right due to non-payment of annual fee |