CN208237487U - Gas safety key with performing leak test - Google Patents
Gas safety key with performing leak test Download PDFInfo
- Publication number
- CN208237487U CN208237487U CN201820734531.7U CN201820734531U CN208237487U CN 208237487 U CN208237487 U CN 208237487U CN 201820734531 U CN201820734531 U CN 201820734531U CN 208237487 U CN208237487 U CN 208237487U
- Authority
- CN
- China
- Prior art keywords
- gas
- connect
- nitrogen
- valve
- pressure testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
Gas safety key with performing leak test includes: PLC control, gas pipeline, gas cutting device, nitrogen system and gas pressure testing element, PLC control is connect with gas cutting device, nitrogen system and gas pressure testing element, the connection of gas cutting device gas pipeline, nitrogen system is connect with the gas pipeline second half section, and gas pressure testing element is connect with gas pipeline.Wherein, gas cutting device includes: the first automatic cut-off valve for gas, the second automatic cut-off valve for gas, coal gas automatic relief stop valve and coal gas conveying bypass line.The utility model is compared with traditional technology, and test gas uses nitrogen in safety-key, substantially increases safety；By the chain dual monitoring of PLC software and hardware, the working condition of pressure instrumentation and automatic valve can be recorded with on-line real time monitoring；1 automatic stop valve is eliminated, power control cabinet is eliminated, is controlled using PLC, is saving cost, reduces failure rate, improves accuracy of leaking hunting.
Description
Technical field
The utility model relates to steel production and processings, and in particular to the gas safety key with performing leak test.
Background technique
With coal gas in iron and steel domain as the more and more extensive of main fuel, recognize along with for environmental protection and safety
With desired gradually height-regulating, the safety requirements of coal gas system is also stepped up.In coal gas system, the equipment of core is exactly
Safety-key.Its effect is: realizing when detecting signal fault in process system and quick and precisely cuts off, prevents the hair of accident
It is raw.
Traditional safety-key has the following problems by performing leak test, when automatic cut-off valve for gas is opened, inputs gas
For coal gas, there are security risks；Time relay control there is response speeds poor, time of measuring length, low precision, maintainability be poor,
The problems such as service life is short；Device valve is more, and coal gas automatic relief stop valve and automatic cut-off valve for gas leak simultaneously
When, it can not judge, leak detection stability is poor, high failure rate；Gas pressure detecting element because can only feedback switch amount, can not react
The case where when micro-leakage, need to test 5 minutes, and the testing time is long；Independent control cabinet of the control cabinet as safety-key, it is at high cost.
To solve the above-mentioned problems, we are made that a series of improvement.
Utility model content
The purpose of the utility model is to provide the gas safety keys with performing leak test, to overcome the prior art to be deposited
Disadvantages mentioned above and deficiency.
Gas safety key with performing leak test includes: PLC control, gas pipeline, gas cutting device, nitrogen system
System and gas pressure testing element, the PLC control connect with gas cutting device, nitrogen system and gas pressure testing element
It connects, the gas cutting device is connect with gas pipeline, and the nitrogen system is connect with the gas pipeline second half section, institute
Gas pressure testing element is stated to connect with gas pipeline；
Wherein, the gas cutting device includes: the first automatic cut-off valve for gas, the second automatic cut-off valve for gas, coal gas
Automatic relief stop valve and coal gas convey bypass line, and first automatic cut-off valve for gas and gas pipeline front half section connect
It connects, second automatic cut-off valve for gas is connect with the gas pipeline second half section, the coal gas conveying bypass line and coal gas
Conveyance conduit connection, the coal gas automatic relief stop valve are connect with coal gas conveying bypass line.
Further, the nitrogen system includes: nitrogen gas delivery-line, nitrogen automatic stop valve and nitrogen check-valves, described
Nitrogen gas delivery-line is connect with gas pipeline, is connect on the outside of the nitrogen automatic stop valve and nitrogen gas delivery-line, described
It is connect on the inside of nitrogen check-valves and nitrogen gas delivery-line.
Further, the gas pressure testing element includes: that the first gas pressure testing element and the second gas pressure are surveyed
Element is tried, the first gas pressure testing element is set on rear side of the first automatic cut-off valve for gas, and first gas pressure is surveyed
Examination element is connect with gas pipeline, and the second gas pressure testing element is set on rear side of the second automatic cut-off valve for gas,
The second gas pressure testing element is connect with gas pipeline.
The utility model has the beneficial effects that
The utility model is compared with traditional technology, and test gas uses nitrogen in safety-key, substantially increases safety；It is logical
The chain dual monitoring of PLC software and hardware is crossed, the work of pressure instrumentation and automatic valve can be recorded with on-line real time monitoring
Make state；1 automatic stop valve is eliminated, power control cabinet is eliminated, is controlled using PLC, reduced while saving cost
Failure rate improves accuracy of leaking hunting, and the test a cycle time only has 2 minutes, shortens the testing time.
Detailed description of the invention:
Fig. 1 is the structure chart of the utility model.
Appended drawing reference:
PLC controls 100, gas pipeline 200, gas cutting device 300, the first automatic cut-off valve for gas 310, second
Automatic cut-off valve for gas 320, coal gas automatic relief stop valve 330 and coal gas convey bypass line 340.
Nitrogen system 400, nitrogen gas delivery-line 410, nitrogen automatic stop valve 420 and nitrogen check-valves 430.
Gas pressure testing element 500, the first gas pressure testing element 510 and the second gas pressure testing element 520.
Specific embodiment
Below in conjunction with specific embodiment, progress explanation is made to the utility model.It should be understood that following embodiment is merely to illustrate
The utility model is not for restriction the scope of the utility model.
Embodiment 1
Fig. 1 is the structure chart of the utility model.
As shown in Figure 1, the gas safety key with performing leak test includes: that PLC controls 100, gas pipeline 200, coal
Gas disconnecting device 300, nitrogen system 400 and gas pressure testing element 500, PLC control 100 and gas cutting device 300, nitrogen
Gas system 400 and gas pressure testing element 500 connect, and gas cutting device 300 is connect with gas pipeline 200, nitrogen
System 400 is connect with 200 second half section of gas pipeline, and gas pressure testing element 500 is connect with gas pipeline 200.
Wherein, gas cutting device 300 include: the first automatic cut-off valve for gas 310, the second automatic cut-off valve for gas 320,
Coal gas automatic relief stop valve 330 and coal gas convey bypass line 340, the first automatic cut-off valve for gas 310 and gas conveying tube
The connection of 200 front half section of road, the second automatic cut-off valve for gas 320 are connect with 200 second half section of gas pipeline, and coal gas conveys branch
Pipeline 340 is connect with gas pipeline 200, and coal gas automatic relief stop valve 330 is connect with coal gas conveying bypass line 340.
Nitrogen system 400 includes: nitrogen gas delivery-line 410, nitrogen automatic stop valve 420 and nitrogen check-valves 430, nitrogen
Conveyance conduit 410 is connect with gas pipeline 200, is connected on the outside of nitrogen automatic stop valve 420 and nitrogen gas delivery-line 410,
It is connected on the inside of nitrogen check-valves 430 and nitrogen gas delivery-line 410.
Gas pressure testing element 500 includes: the first gas pressure testing element 510 and the second gas pressure testing element
520, the first gas pressure testing element 510 is set to 310 rear side of the first automatic cut-off valve for gas, the first gas pressure testing element
510 connect with gas pipeline 200, after the second gas pressure testing element 520 is set to the second automatic cut-off valve for gas 320
Side, the second gas pressure testing element 520 are connect with gas pipeline 200.
Utility model works principle is integrated into all signal of interest by PLC control 100 using PLC control 100
During hardware is chain, using 100 all signal of interest of real time monitoring of PLC control, it can guarantee to pacify when any signal of interest occurs
The quick cutting of full key board, realizes the duplicate protection of software and hardware.The hand before nitrogen check-valves 430 in nitrogen system 400
Valve changes nitrogen automatic stop valve 420 into, and low tension switch alarm has been changed to gas pressure detecting element 500, has eliminated a coal
Gas automatic stop valve.Specific testing process, first the first automatic cut-off valve for gas 310, the second automatic cut-off valve for gas 320 and nitrogen
Gas automatic stop valve 420 keeps off-position, and coal gas automatic relief stop valve 330 is opened, 510 numerical value of the first gas pressure testing element
It is 0.
First gas pressure testing element 510 is closed, and gas pipeline 200 is sent before the first automatic cut-off valve for gas 310
Gas keeps pressure, and 500 numerical value of gas pressure testing element is 0, illustrates that the first automatic cut-off valve for gas 310 is not revealed；Nitrogen
System 400 is opened, and is passed through nitrogen, real-time monitoring simultaneously makes pressure reach a numerical value and records.Close nitrogen system 400, record
The pressure value of second gas pressure testing element 520 monitors the first gas pressure test member at the appointed time as requested
The numerical value of part 510 and the second gas pressure testing element 520, meets performing leak test requirement compared with initial value, illustrates
Two automatic cut-off valve for gas 320 and 330 performing leak test of coal gas automatic relief stop valve pass through.
The utility model is compared with traditional technology, and test gas uses nitrogen in safety-key, substantially increases safety；It is logical
The chain dual monitoring of PLC software and hardware is crossed, the work of pressure instrumentation and automatic valve can be recorded with on-line real time monitoring
Make state；1 automatic stop valve is eliminated, power control cabinet is eliminated, is controlled using PLC, reduced while saving cost
Failure rate improves accuracy of leaking hunting, and the test a cycle time only has 2 minutes, shortens the testing time.
Specific embodiment of the present utility model is illustrated above, but the utility model is not limited thereto, only
The objective of the utility model is not departed from, the utility model there can also be various change.
Claims (3)
1. the gas safety key with performing leak test characterized by comprising PLC controls (100), gas pipeline
(200), gas cutting device (300), nitrogen system (400) and gas pressure testing element (500), the PLC control (100)
It is connect with gas cutting device (300), nitrogen system (400) and gas pressure testing element (500), the gas cutting device
(300) it being connect with gas pipeline (200), the nitrogen system (400) connect with gas pipeline (200) second half section,
The gas pressure testing element (500) connect with gas pipeline (200)；
Wherein, the gas cutting device (300) includes: the first automatic cut-off valve for gas (310), the second automatic cut-off valve for gas
(320), coal gas automatic relief stop valve (330) and coal gas conveying bypass line (340), first automatic cut-off valve for gas
(310) it is connect with gas pipeline (200) front half section, second automatic cut-off valve for gas (320) and gas pipeline
(200) second half section connects, and coal gas conveying bypass line (340) connect with gas pipeline (200), and the coal gas is automatic
Release stop valve (330) is connect with coal gas conveying bypass line (340).
2. the gas safety key according to claim 1 with performing leak test, it is characterised in that: the nitrogen system
It (400) include: nitrogen gas delivery-line (410), nitrogen automatic stop valve (420) and nitrogen check-valves (430), the nitrogen conveying
Pipeline (410) is connect with gas pipeline (200), and the nitrogen automatic stop valve (420) and nitrogen gas delivery-line (410) are outside
It is connect on the inside of side connection, the nitrogen check-valves (430) and nitrogen gas delivery-line (410).
3. the gas safety key according to claim 1 with performing leak test, it is characterised in that: the gas pressure test
Element (500) includes: the first gas pressure testing element (510) and the second gas pressure testing element (520), first coal
Atmospheric pressure testing element (510) is set on rear side of the first automatic cut-off valve for gas (310), the first gas pressure testing element
(510) it is connect with gas pipeline (200), the second gas pressure testing element (520) is set to the second coal gas and cuts automatically
On rear side of disconnected valve (320), the second gas pressure testing element (520) connect with gas pipeline (200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820734531.7U CN208237487U (en) | 2018-05-17 | 2018-05-17 | Gas safety key with performing leak test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820734531.7U CN208237487U (en) | 2018-05-17 | 2018-05-17 | Gas safety key with performing leak test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208237487U true CN208237487U (en) | 2018-12-14 |
Family
ID=64579804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820734531.7U Active CN208237487U (en) | 2018-05-17 | 2018-05-17 | Gas safety key with performing leak test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208237487U (en) |
-
2018
- 2018-05-17 CN CN201820734531.7U patent/CN208237487U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101324485A (en) | Test device and method for detecting security of fuel battery passenger car hydrogen feed system | |
| CN109883724B (en) | Performance detection device and detection method for EBS (electronic brake system) double-channel bridge module | |
| CN104949831A (en) | Online checking device and methods for pilot valve and main valve of pilot operated safety valve | |
| CN211780238U (en) | Hydrogen-containing natural gas pipeline safety guarantee system based on hydrogen accumulation control | |
| CN208237487U (en) | Gas safety key with performing leak test | |
| CN207865034U (en) | A kind of gas pressure regulating system | |
| CN111322521B (en) | Hydrogen accumulation control-based hydrogen-containing natural gas pipeline safety guarantee system and method | |
| CN204664860U (en) | A kind of concentrated nitrogen gas supply system | |
| CN207865038U (en) | A kind of natural gas decompression transport system | |
| CN102620145A (en) | Automatic low-pressure protection system for coke oven gas pipeline | |
| CN201944547U (en) | System for compressed natural gas supply station | |
| CN202220962U (en) | Lubricating system with pipeline leakage detecting function | |
| CN204731018U (en) | Pilot valve and main valve on-line testing device in pilot operated safety valve | |
| CN205191220U (en) | Instrument air supply system | |
| CN210514303U (en) | Intelligent double-insurance carrier-gas-free online monitoring device for dissolved gas in oil | |
| CN109856187B (en) | Online real-time detection method for hydrocarbon dew point of gas pipeline | |
| CN209927761U (en) | Online real-time detection device for hydrocarbon dew point of gas pipeline | |
| CN209841751U (en) | Online real-time detection device for water dew point of gas pipeline | |
| CN202583849U (en) | Coke oven gas pipeline low-pressure automatic protection system | |
| CN207485660U (en) | For the decompression buffer unit of large reciprocating compressor enclosed performance test system | |
| CN202469496U (en) | Beam tube leak detector | |
| CN217107299U (en) | Brake control device | |
| CN207239694U (en) | The warning device that a kind of automatic detection rotary work-table angle deflects | |
| CN204922521U (en) | Gas valve automatic checkout device that leaks gas | |
| CN213516326U (en) | Valve off-line pressure test tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |