CN216536622U - Low-temperature fire extinguishing system for oil quenching process - Google Patents
Low-temperature fire extinguishing system for oil quenching process Download PDFInfo
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- CN216536622U CN216536622U CN202123184315.0U CN202123184315U CN216536622U CN 216536622 U CN216536622 U CN 216536622U CN 202123184315 U CN202123184315 U CN 202123184315U CN 216536622 U CN216536622 U CN 216536622U
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Abstract
The utility model discloses a low-temperature fire extinguishing system for an oil quenching process, which comprises an oil fume purification device, a flame induction sealing device and a liquid nitrogen gasification spraying device, wherein the oil fume purification device is connected with the flame induction sealing device; wherein the oil fume purification device comprises an oil fume pipeline erected above the quenching oil tank, and an oil fume purifier and an exhaust fan which are sequentially connected with the outlet of the oil fume pipeline; the flame induction sealing device is connected in the oil smoke pipeline close to the smoke inlet and comprises a smoke exhaust fire valve with a blocking baffle, and a temperature thermocouple is arranged on the oil smoke pipeline between the smoke exhaust fire valve and the smoke inlet; the liquid nitrogen gasification spraying device comprises a nitrogen pipeline which is fixed on the outer side wall of the oil smoke pipeline and communicated with an external liquid nitrogen storage tank and a spray pipe which extends to the front end of a smoke inlet of the oil smoke pipeline, and a plurality of liquid spraying ports are arranged on the spray pipe at intervals; a pressure gauge and a control valve are arranged on the nitrogen pipeline. The utility model has smart structure, can quickly extinguish the ignition point in the oil smoke pipeline, effectively prevent the fire from spreading and avoid larger loss.
Description
Technical Field
The utility model relates to a fire extinguishing system, in particular to a low-temperature fire extinguishing system for an oil quenching process.
Background
The oil quenching process is a commonly used quenching process in the heat treatment industry, a large amount of oil smoke is generated during working, therefore, an oil smoke pipeline is arranged above a quenching oil groove, and the generated oil smoke is pumped into an oil smoke purifier from the oil smoke pipeline by using an exhaust fan to be treated and then is discharged. However, when quenching some long tubular workpieces, there is often a risk of fire at the entrance of the oil smoke pipe. Once a fire occurs, because the fire occurs in the pipeline and the position of the pipeline is higher, the existing carbon dioxide dry powder fire extinguisher is extremely difficult to extinguish the fire rapidly, so that the fire spreads in the pipeline, and more serious consequences are caused.
Disclosure of Invention
The utility model aims to provide a low-temperature fire extinguishing system for an oil quenching process, which can timely catch fire when a fire disaster occurs in an oil smoke pipeline, effectively prevent flame from spreading and reduce loss.
In order to achieve the purpose, the utility model can adopt the following technical scheme:
the low-temperature fire extinguishing system for the oil quenching process comprises
The oil fume purification device is used for collecting and purifying oil fume discharged by the quenching oil tank;
the flame induction sealing device is used for detecting the temperature of the oil smoke entering the oil smoke pipeline and plugging the oil smoke pipeline in time;
the liquid nitrogen gasification spraying device sprays liquid nitrogen to the ignition point in the oil smoke pipeline in time when a fire disaster occurs, and extinguishes the fire.
The oil fume purification device comprises an oil fume pipeline arranged above the quenching oil tank, and an oil fume purifier and an exhaust fan which are sequentially connected with the outlet of the oil fume pipeline; the flame induction sealing device is connected in the oil smoke pipeline close to the smoke inlet.
The flame induction sealing device comprises a smoke exhaust fire valve with a sealing baffle, and a temperature thermocouple is arranged on an oil smoke pipeline between the smoke exhaust fire valve and the smoke inlet.
The liquid nitrogen gasification spraying device comprises a nitrogen pipeline which is fixed on the outer side wall of the oil smoke pipeline and communicated with an external liquid nitrogen storage tank, and a spray pipe which extends to the front end of a smoke inlet of the oil smoke pipeline, wherein a plurality of liquid spraying ports are arranged on the spray pipe at intervals; and a pressure gauge and a control valve are arranged on the nitrogen pipeline.
The length of the spray pipe is adapted to the inner diameter of the oil smoke pipeline.
The utility model has the advantages of ingenious structure, capability of quickly extinguishing the ignition point in the oil smoke pipeline, effective prevention of fire spread and avoidance of larger loss.
When the low-temperature fire extinguishing system works, the smoke discharge fire prevention valve is used for plugging the pipeline, so that a relatively closed space is formed at the front end of the pipeline, and the spread of fire is prevented; then liquid nitrogen is sprayed rapidly from the inlet of the smoke exhaust pipeline, and the liquid nitrogen is rapidly gasified when sprayed out by utilizing the ultralow temperature characteristic of the liquid nitrogen, so that a large amount of heat is absorbed, the temperature of the closed space area is reduced to be below the ignition point, the oxygen content of the ignition area is reduced, and the purpose of rapidly extinguishing fire is achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of the nitrogen showerhead of fig. 1.
Detailed Description
The present invention is described in more detail below with reference to specific examples to facilitate understanding for those skilled in the art.
It should be understood by those skilled in the art that the present embodiment is only for explaining the technical principle of the present application, and is not intended to limit the scope of protection of the present application. Although the components in the drawings are illustrated in a certain proportional relationship, the proportional relationship is not constant, and those skilled in the art can make modifications as required to adapt to specific applications, and the modified embodiments will still fall within the scope of the present application.
Furthermore, it should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, a detachable connection, or an integral connection; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two members. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.
As shown in fig. 1, the low-temperature fire extinguishing system for oil quenching process of the present invention comprises an oil fume purification device for collecting and purifying oil fume discharged from a quenching oil tank; the flame induction sealing device is used for detecting the temperature of the oil smoke entering the oil smoke pipeline and plugging the oil smoke pipeline in time; the liquid nitrogen gasification spraying device sprays liquid nitrogen to the ignition point in the oil smoke pipeline in time when a fire disaster occurs, and extinguishes the fire.
Preferably, the lampblack purification device comprises a lampblack pipeline 1 arranged above the quenching oil tank 101, and a lampblack purifier 2 and an exhaust fan 3 which are sequentially connected to the outlet of the lampblack pipeline 1; the exhaust fan 3 is arranged at the rear end of the oil smoke pipeline 1 and is connected with the oil smoke purifier 2 through a fan pipeline, and the inlet of the oil smoke purifier 2 is connected with the outlet of the oil smoke pipeline 1; during quenching, the oil smoke above the quenching oil tank 101 enters the oil smoke purifier 2 through the oil smoke pipeline 1 under the action of the exhaust fan 3, and is exhausted out of the exhaust fan 3 after being purified.
The flame induction sealing device is connected to an oil smoke pipeline 1 close to a smoke inlet, and particularly comprises a smoke exhaust fire damper 4, a blocking baffle 4.1 is arranged in the smoke exhaust fire damper 4, and a temperature thermocouple 5 is arranged on the oil smoke pipeline between the smoke exhaust fire damper 4 and the smoke inlet. The temperature thermocouple 5 is used for detecting the temperature in the oil smoke pipeline 1, and further judging whether a fire disaster occurs in the pipeline; if the temperature thermocouple 5 gives an abnormal temperature alarm, the smoke exhaust fire damper 4 is started, the blocking baffle 4.1 is switched from a horizontal state to a vertical state, and the smoke exhaust pipeline 1 is blocked. The smoke fire damper 4 may be a commercially available smoke fire damper manufactured by yofeng air conditioning equipment ltd, texas.
The liquid nitrogen gasification spraying device comprises a liquid nitrogen storage tank 6 and a nitrogen pipeline 7 communicated with the liquid nitrogen storage tank 6, wherein the nitrogen pipeline 7 is also provided with a pressure gauge 8 and a control valve 9, the outlet section of the nitrogen pipeline 7 is fixed on the oil smoke pipeline 1 through a fixing clamp 10, the end part of the nitrogen pipeline extends to the front of the smoke inlet of the oil smoke pipeline 1, and the nitrogen pipeline positioned in front of the smoke inlet is provided with a plurality of liquid spraying ports 11 at intervals to form a spraying pipe which is adaptive to the inner diameter of the oil smoke pipeline, as shown in figure 2.
In practical use, the liquid nitrogen storage tank 6 is special for the heat treatment carburizing process and does not need to be equipped independently.
The action process of the utility model is as follows:
when a long tubular workpiece is subjected to oil quenching in the quenching oil groove 101, a large amount of oil smoke is generated and enters the oil smoke pipeline 1 under the action of the exhaust fan 3; when the temperature of the workpiece is high, part of the flame enters the oil smoke pipe 1 along with the oil smoke, and further fire may be caused at the inlet of the oil smoke pipe 1.
When a fire disaster occurs, the temperature thermocouple 5 detects the temperature abnormality in the oil smoke pipeline 31 and sends out an abnormal temperature alarm in time (an automatic control system can also be adopted), at the moment, the fan 3 is closed, the air in the oil smoke pipeline 1 is stopped being extracted, the fire is prevented from further spreading in the oil smoke pipeline 1, then the smoke exhaust fire valve 4 is started, the blocking baffle 4.1 is switched from a horizontal state to a vertical state, and a closed space is formed at the inlet of the oil smoke pipeline 1; open control flap 9 on the nitrogen gas pipeline 7, the liquid nitrogen in the liquid nitrogen holding vessel 6 passes through the spray tube that nitrogen gas pipeline 7 reachd the tip, and a plurality of hydrojet mouths 11 on the spray tube spout into low temperature liquid nitrogen to oil smoke pipeline 1 simultaneously, play the purpose of putting out a fire through two kinds of modes after low temperature liquid nitrogen gets into airtight space: firstly, gasifying and absorbing a large amount of heat through liquid nitrogen to quickly reduce the temperature in the closed space to be below an ignition point; the second process is to exhaust the oxygen in the sealed space to make the sealed space not have the condition of fire. When a fire is extinguished, the temperature thermocouple 5 detects that the temperature in the fume pipeline 1 is normal, the control valve 9 on the nitrogen pipeline 7 is closed, the introduction of liquid nitrogen is stopped, then the fume exhaust fire valve 4 is closed, the exhaust fan 3 is opened, and the air circulation in the fume pipeline 1 is recovered.
Claims (5)
1. A low temperature fire extinguishing system for oil quenching technology which characterized in that: comprises that
The oil fume purification device is used for collecting and purifying oil fume discharged by the quenching oil tank;
the flame induction sealing device is used for detecting the temperature of the oil smoke entering the oil smoke pipeline and plugging the oil smoke pipeline in time;
the liquid nitrogen gasification spraying device sprays liquid nitrogen to the ignition point in the oil smoke pipeline in time when a fire disaster occurs, and extinguishes the fire.
2. The cryogenic fire extinguishing system for the oil quenching process according to claim 1, wherein: the oil fume purification device comprises an oil fume pipeline arranged above the quenching oil tank, and an oil fume purifier and an exhaust fan which are sequentially connected with the outlet of the oil fume pipeline; the flame induction sealing device is connected in the oil smoke pipeline close to the smoke inlet.
3. The cryogenic fire extinguishing system for an oil quenching process according to claim 2, wherein: the flame induction sealing device comprises a smoke exhaust fire valve with a sealing baffle, and a temperature thermocouple is arranged on an oil smoke pipeline between the smoke exhaust fire valve and the smoke inlet.
4. The cryogenic fire extinguishing system for the oil quenching process according to claim 1, wherein: the liquid nitrogen gasification spraying device comprises a nitrogen pipeline which is fixed on the outer side wall of the oil smoke pipeline and communicated with an external liquid nitrogen storage tank, and a spray pipe which extends to the front end of a smoke inlet of the oil smoke pipeline, wherein a plurality of liquid spraying ports are arranged on the spray pipe at intervals; and a pressure gauge and a control valve are arranged on the nitrogen pipeline.
5. The cryogenic fire extinguishing system for the oil quenching process according to claim 4, wherein: the length of the spray pipe is adapted to the inner diameter of the oil smoke pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123184315.0U CN216536622U (en) | 2021-12-17 | 2021-12-17 | Low-temperature fire extinguishing system for oil quenching process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123184315.0U CN216536622U (en) | 2021-12-17 | 2021-12-17 | Low-temperature fire extinguishing system for oil quenching process |
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| Publication Number | Publication Date |
|---|---|
| CN216536622U true CN216536622U (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123184315.0U Active CN216536622U (en) | 2021-12-17 | 2021-12-17 | Low-temperature fire extinguishing system for oil quenching process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216536622U (en) |
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2021
- 2021-12-17 CN CN202123184315.0U patent/CN216536622U/en active Active
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