CN202381998U - Safety cut-off device for natural gas - Google Patents
Safety cut-off device for natural gas Download PDFInfo
- Publication number
- CN202381998U CN202381998U CN2011205335817U CN201120533581U CN202381998U CN 202381998 U CN202381998 U CN 202381998U CN 2011205335817 U CN2011205335817 U CN 2011205335817U CN 201120533581 U CN201120533581 U CN 201120533581U CN 202381998 U CN202381998 U CN 202381998U
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- pipe
- ball valve
- pneumatic ball
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Abstract
The utility model relates to a safety cut-off valve for natural gas. The safety cut-off valve comprises a high-pressure gas pipe, a pressure regulator, a safety cut-off valve, a low-pressure gas pipe, a pressure sensor, a high-pressure acquiring pipe, a high-pressure pneumatic ball valve, a low-pressure pneumatic ball valve, a PLC (Programmable Logic Controller) and a low-pressure acquiring pipe, wherein the high-pressure gas pipe, the pressure regulator and the low-pressure gas pipe are sequentially connected; the side wall of the high-pressure gas pipe is connected with the PLC through the high-pressure acquiring pipe; the high-pressure pneumatic ball valve is arranged on the high-pressure acquiring pipe; the side wall of the low-pressure gas pipe is connected with the PLC through the low-pressure acquiring pipe; the low-pressure pneumatic ball valve is arranged on the low-pressure acquiring pipe; the safety cut-off valve is respectively connected with the pressure regulator, the high-pressure pneumatic ball valve and the low-pressure pneumatic ball valve; and the pressure regulator is respectively connected with the low-pressure gas pipe and the PLC. According to the safety cut-off valve for the natural gas, which is disclosed by the utility model, the function for normally starting and cutting off the natural gas can be ensured under special conditions of natural gas leakage, cold weather and the like.
Description
Technical field
The utility model relates to a kind of rock gas safety cut-out device, belongs to the rock gas security appliance field.
Background technique
As everyone knows, rock gas is as a kind of clean energy resource, in people's industry and life, bringing into play very important effect, but because rock gas is a kind of inflammable, explosive inflammable gas, so that the safe utilization of rock gas just seems is particularly important.At present; What CNG pressure regulation sled generally adopted is that superpressure safety is diffused and superpressure safety cut-off technology; Promptly when the pressure in the downstream line after the pressure regulation is excessive, carry out pressure release or cut off air feed, but find that in long-term practice process there is following defective in this traditional cut-out equipment: one, when downstream line is broken after the pressure regulation; Cause a large amount of gas leakages; Gas pressure after pressure regulation this moment in the downstream line constantly reduces, and traditional safety cut-off valve will lose efficacy, and can't realize closing; Two, cross when low when the temperature outside the natural feed channel, particularly in the Northeast of China, the stifled situation of ice often takes place in the pressure pipeline, safety cut-off valve also can't start this moment.
Summary of the invention
The technical problem that the utility model will solve is to the improvement of existing rock gas safety cut-out device, proposes the high rock gas safety cut-out device of a kind of Safety performance.
For solving the problems of the technologies described above; The technological scheme that the utility model adopts is: a kind of rock gas safety cut-out device comprises high-pressure gas pipe, pressure governor, safety cut-off valve, low-pressure gas pipe, pressure transducer, high pressure pressure pipe, high-pressure pneumatic ball valve, low-pressure pneumatic ball valve, PLC and low pressure pressure pipe; Said high-pressure gas pipe, pressure governor, low-pressure gas pipe connect successively; The sidewall of said high-pressure gas pipe is connected with PLC through high pressure pressure pipe, and said high pressure pressure pipe is provided with the high-pressure pneumatic ball valve; The sidewall of said low-pressure gas pipe is connected with PLC through low pressure pressure pipe, and said low pressure pressure pipe is provided with the low-pressure pneumatic ball valve; Said safety cut-off valve is connected with said pressure governor respectively, high-pressure pneumatic ball valve, low-pressure pneumatic ball valve connect; Said pressure transducer is connected with PLC with low-pressure gas pipe respectively.
As preferred version, the utility model has also adopted following technical characteristics:
Adopt flange plate to be connected between said high-pressure gas pipe and the said pressure governor;
Adopt flange plate to be connected between said pressure governor and the said low-pressure gas pipe.
Advantage and the good effect that the utlity model has are: one, through adopts pressure sensor and PLC, make the staff can realize real-time monitoring to the gas pressure in the low-pressure gas pipe; Two, through in device, increasing high pressure pressure pipe and high-pressure pneumatic ball valve; And high-pressure pneumatic ball valve and low-pressure pneumatic ball valve are controlled, thereby make and the utlity model has the function that in particular cases realizes the safety cut-off rock gas at downstream line gas leakage or cold snap through PLC.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Among the figure: 1, high-pressure gas pipe; 2, pressure governor; 3, safety cut-off valve; 4, low-pressure gas pipe; 5, pressure transducer; 6, high pressure pressure pipe; 7, high-pressure pneumatic ball valve; 8, low-pressure pneumatic ball valve; 9, PLC; 10, low pressure pressure pipe.
Embodiment
For further understanding content, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
Fig. 1 is the structural representation of the utility model; A kind of rock gas safety cut-out device, its technical characteristics is: comprise high-pressure gas pipe 1, pressure governor 2, safety cut-off valve 3, low-pressure gas pipe 4, pressure transducer 5, high pressure pressure pipe 6, high-pressure pneumatic ball valve 7, low-pressure pneumatic ball valve 8, PLC9 and low pressure pressure pipe 10; Said high-pressure gas pipe 1, pressure governor 2, low-pressure gas pipe 4 connect successively; The sidewall of said high-pressure gas pipe 1 is connected with PLC9 through high pressure pressure pipe 6, and said high pressure pressure pipe 1 is provided with high-pressure pneumatic ball valve 7; The sidewall of said low-pressure gas pipe 4 is connected with PLC9 through low pressure pressure pipe 10, and said low pressure pressure pipe 10 is provided with low-pressure pneumatic ball valve 8; Said safety cut-off valve 3 is connected with said pressure governor 2 respectively, high-pressure pneumatic ball valve 7, low-pressure pneumatic ball valve 8 connects; Said pressure transducer 5 is connected with PLC9 with low-pressure gas pipe 4 respectively.Adopt flange plate to be connected between said high-pressure gas pipe 1 and the said pressure governor 2; Adopt flange plate to be connected between said pressure governor 2 and the said low-pressure gas pipe 4.
The concrete working procedure of the utility model is: under the normal condition; High-pressure pneumatic ball valve 7 is closed, and low-pressure pneumatic ball valve 8 is opened, when the air pressure in the low-pressure gas pipe 4 is too high; High-pressure natural gas drives safety cut-off valve 3 through low-pressure gas pipe 4 and starts, and safety cut-off valve 3 drives pressure governor 2 work; In particular cases, when such as low-pressure gas pipe 4 gas leakage taking place, the air pressure in the low pressure pressure pipe 10 is low excessively; Can't drive safety cut-off valve 3 and start, the air pressure in 5 pairs of low-pressure gas pipes of pressure transducer 4 detects in real time, and detected air pressure signal is sent to PLC9; PLC9 analyzes according to air pressure signal and judges, when air pressure signal exceeded preset safety range, PLC9 started high-pressure pneumatic ball valve 7; Close low-pressure pneumatic ball valve 8 simultaneously, at this moment, the pressurized gas in the high-pressure gas pipe 1 drive safety cut-off valve 3 through high pressure pressure pipe 6 and start; Safety cut-off valve 3 and then 2 work of driving pressure governor, the safety cut-off task of completion rock gas.
More than a kind of embodiment of the utility model is specified, but said content is merely the preferred embodiment of the utility model, can not be considered to be used to limit the practical range of the utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the utility model.
Claims (3)
1. a rock gas safety cut-out device comprises high-pressure gas pipe, pressure governor, safety cut-off valve, low-pressure gas pipe, pressure transducer, high pressure pressure pipe, high-pressure pneumatic ball valve, low-pressure pneumatic ball valve, PLC and low pressure pressure pipe; It is characterized in that: said high-pressure gas pipe, pressure governor, low-pressure gas pipe connect successively; The sidewall of said high-pressure gas pipe is connected with PLC through high pressure pressure pipe, and said high pressure pressure pipe is provided with the high-pressure pneumatic ball valve; The sidewall of said low-pressure gas pipe is connected with PLC through low pressure pressure pipe, and said low pressure pressure pipe is provided with the low-pressure pneumatic ball valve; Said safety cut-off valve is connected with said pressure governor respectively, high-pressure pneumatic ball valve, low-pressure pneumatic ball valve connect; Said pressure transducer is connected with PLC with low-pressure gas pipe respectively.
2. according to the described a kind of rock gas safety cut-out device of claim 1, it is characterized in that: adopt flange plate to be connected between said high-pressure gas pipe and the said pressure governor.
3. according to the described a kind of rock gas safety cut-out device of claim 1, it is characterized in that: adopt flange plate to be connected between said pressure governor and the said low-pressure gas pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205335817U CN202381998U (en) | 2011-12-18 | 2011-12-18 | Safety cut-off device for natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205335817U CN202381998U (en) | 2011-12-18 | 2011-12-18 | Safety cut-off device for natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381998U true CN202381998U (en) | 2012-08-15 |
Family
ID=46630500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205335817U Expired - Fee Related CN202381998U (en) | 2011-12-18 | 2011-12-18 | Safety cut-off device for natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381998U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975676A (en) * | 2017-11-17 | 2018-05-01 | 董人菘 | A kind of long-range regulator using I/P converter |
-
2011
- 2011-12-18 CN CN2011205335817U patent/CN202381998U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975676A (en) * | 2017-11-17 | 2018-05-01 | 董人菘 | A kind of long-range regulator using I/P converter |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20161218 |