CN202116505U - Device for preventing negative-pressure backfire explosion of main gas tube of coke oven - Google Patents
Device for preventing negative-pressure backfire explosion of main gas tube of coke oven Download PDFInfo
- Publication number
- CN202116505U CN202116505U CN2011202142530U CN201120214253U CN202116505U CN 202116505 U CN202116505 U CN 202116505U CN 2011202142530 U CN2011202142530 U CN 2011202142530U CN 201120214253 U CN201120214253 U CN 201120214253U CN 202116505 U CN202116505 U CN 202116505U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- travel switch
- oil cylinder
- switches
- feeler lever
- 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.)
- Expired - Fee Related
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- Coke Industry (AREA)
Abstract
The utility model discloses a device for preventing negative-pressure backfire explosion of a main gas tube of a coke oven, which comprises a cylinder mounted on a base. A free end of a piston rod of the cylinder is vertically provided with an upper contact rod and a lower contact rod, the upper contact rod is in linkage with a displacement sensor which is horizontally mounted on a support above the piston rod, a PLC (programmable logic controller) which is connected with the displacement sensor is disposed at one end of the support, the lower contact rod is in linkage with three travel switches which are horizontally uniformly mounted below the piston rod at intervals, the three travel switches include an open-station travel switch, a halfway travel switch and a close-station travel switch according to distances from the switches to the cylinder, and the three switches are connected with the PLC. The device is simple in structure, can detect the movement position of the piston rod of the cylinder in real time, and ensures safe production.
Description
Technical field
The utility model relates to a kind of coke-oven gas that prevents and is responsible for the device of negative pressure back draft.
Background technology
The former reversing machine coking coal of coking coke oven adds in the thermal control; When vault coal gas main pipe pressure is lower than 500Pa; The supervisory system low pressure alarming by switching-over worker manual operation, stops to coal gas stroke half way position (being coke-oven gas exchange cock Close All position) with coke-oven gas stroke crawl.But in actual production process, because a variety of causes, the phenomenon of 0Pa once appearred being reduced to rapidly in the coke-oven gas main pipe pressure, if at this moment lean on the people to do out reaction again, occurred the danger that coke-oven gas is responsible for negative pressure back draft possibly.But existing automatic control is not also accomplished.Be responsible for low-voltage signal if occur coke-oven gas suddenly; Consider from process safety; In programdesign, require reversing machine no matter to be in heated condition or be in commutation states, must receive coke-oven gas be responsible for be lower than the signal of 300Pa after; Can not stop the coking coal stroke just can not guarantee heating system personnel, device security immediately to the half way position.Just in commutation process, occurred blast furnace gas suddenly and mixed the low-voltage signal that back cokery side main pipe pressure is lower than 300Pa, at this moment the waste gas stroke just passes through mid point to inverted running from forward.After receiving signal, the waste gas stroke just has been parked in the original place.That is to say that at this moment reverse blast furnace gas stone roller is raised, blast furnace gas and regenerator burning things which may cause a fire disaster are not cut off, if high coal is responsible for negative pressure, occur the danger of back draft possibly.
Summary of the invention
The purpose of the utility model is to provide a kind of coke-oven gas that prevents to be responsible for the device of negative pressure back draft; It can grasp the oil cylinder movement position at any time; Can accomplish required various control for last level controlling system the oil cylinder position condition feedback, guarantee that production safety carries out.
The purpose of the utility model is to realize like this; A kind of coke-oven gas that prevents is responsible for the device of negative pressure back draft; Be included in the oil cylinder of installing on the base; The free end of oil cylinder piston bar vertically is installed with top feeler lever and bottom feeler lever, and top feeler lever and level are installed in the displacement sensor interlock on the support of piston rod top, and an end of support is being provided with the PLC unit that links to each other with displacement sensor; Bottom feeler lever and level are uniformly distributed with three travel switch interlocks that are installed in the piston rod below at interval; Three travel switches are divided into open bit line journey switch, half way travel switch and off-position travel switch according to the distance apart from oil cylinder, and three travel switches all link to each other with the PLC unit.
The utility model is grasped the oil cylinder movement position at any time by being installed in a kind of transmitter that can detect the oil cylinder movement position on the oil cylinder, reaches the purpose that accurate completion control requires.Can accomplish required control requirement for last level controlling system the oil cylinder position condition feedback.For example analog quantity voltage, electric current or SSI export high-rise LOGO/PLC/DCS dispatch control system and are connected, the common composition with accepting different output types by being installed in displacement sensor on the waste gas stroke oil cylinder in system.Displacement sensor is contactless principle of work; There are not wearing and tearing and non-maintaining; It has the multiple way of output, can be connected in the fieldbus of all standards, in the transformation of legacy system, is highly susceptible to being connected; The LED lamp clearly indicates system state, and useful range can be adjusted into the length of sports equipment easily.Guarantee that various travel positions such as oil cylinder are controlled, the accident that prevents takes place.
The utility model is simple in structure, can predict the movement position of oil cylinder piston bar in real time, guarantees that production safety carries out.
Description of drawings
To combine accompanying drawing that the utility model is done further detailed explanation below.
Fig. 1 is the main TV structure synoptic diagram of the utility model.
Embodiment
A kind of coke-oven gas that prevents is responsible for the device of negative pressure back draft; As shown in Figure 1; Be included in the oil cylinder of installing on the base 1; The free end of oil cylinder piston bar vertically is installed with top feeler lever 4 and bottom feeler lever 6, and top feeler lever 4 is installed in displacement sensor 2 interlocks on the support 3 of piston rod top with level, and an end of support 3 is being provided with the PLC unit 5 that links to each other with displacement sensor 2; Bottom feeler lever 6 is uniformly distributed with three travel switch interlocks that are installed in the piston rod below at interval with level; Three travel switches are divided into open bit line journey switch 9, half way travel switch 8 and 7, three travel switches of off-position travel switch according to the distance apart from oil cylinder and all link to each other with PLC unit 5.The utility model is simple in structure, can predict the movement position of oil cylinder piston bar in real time, guarantees that production safety carries out.
Claims (1)
1. one kind prevents that coke-oven gas is responsible for the device of negative pressure back draft; Be included in the oil cylinder of installing on the base; It is characterized in that: the free end of oil cylinder piston bar vertically is installed with top feeler lever and bottom feeler lever; Top feeler lever and level are installed in the displacement sensor interlock on the support of piston rod top, and an end of support is being provided with the PLC unit that links to each other with displacement sensor; Bottom feeler lever and level are uniformly distributed with three travel switch interlocks that are installed in the piston rod below at interval; Three travel switches are divided into open bit line journey switch, half way travel switch and off-position travel switch according to the distance apart from oil cylinder, and three travel switches all link to each other with the PLC unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202142530U CN202116505U (en) | 2011-06-23 | 2011-06-23 | Device for preventing negative-pressure backfire explosion of main gas tube of coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202142530U CN202116505U (en) | 2011-06-23 | 2011-06-23 | Device for preventing negative-pressure backfire explosion of main gas tube of coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202116505U true CN202116505U (en) | 2012-01-18 |
Family
ID=45457586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202142530U Expired - Fee Related CN202116505U (en) | 2011-06-23 | 2011-06-23 | Device for preventing negative-pressure backfire explosion of main gas tube of coke oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202116505U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618302A (en) * | 2012-03-18 | 2012-08-01 | 莱芜市泰山焦化有限公司 | Device for preventing coke oven gas main pipe from forming negative pressure and using method thereof |
| CN103952160A (en) * | 2014-05-14 | 2014-07-30 | 武汉科技大学 | Device for preventing coke oven gas main pipe from forming negative pressure |
-
2011
- 2011-06-23 CN CN2011202142530U patent/CN202116505U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618302A (en) * | 2012-03-18 | 2012-08-01 | 莱芜市泰山焦化有限公司 | Device for preventing coke oven gas main pipe from forming negative pressure and using method thereof |
| CN103952160A (en) * | 2014-05-14 | 2014-07-30 | 武汉科技大学 | Device for preventing coke oven gas main pipe from forming negative pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20120623 |