CN210624172U - Heating furnace gas pipe network system - Google Patents
Heating furnace gas pipe network system Download PDFInfo
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- CN210624172U CN210624172U CN201920913918.3U CN201920913918U CN210624172U CN 210624172 U CN210624172 U CN 210624172U CN 201920913918 U CN201920913918 U CN 201920913918U CN 210624172 U CN210624172 U CN 210624172U
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Abstract
The utility model relates to a heating furnace gas piping system, include: the gas branch pipe is connected to an output port of the gas main pipe; a first pneumatic valve is arranged at the gas inlet end of the gas main pipe, a protective gas input pipeline is arranged between the first pneumatic valve and the output port, a second pneumatic valve is arranged on the protective gas input pipeline, a control valve is arranged between at least one burner and the output port of the gas main pipe, and third pneumatic valves are arranged between the rest burners and the output port of the gas main pipe; when the compressed air is lower than the safety pressure, the first pneumatic valve is automatically cut off, each third pneumatic valve is automatically cut off, the second pneumatic valve is automatically opened and protective gas is introduced, and at least one control valve is kept in an open state, so that the increasing speed of the gas pressure in the heating furnace gas pipe network system is slowed down, the gas pipe network is prevented from running at overpressure, overpressure accidents are generated, and pressure is relieved in time.
Description
Technical Field
The utility model relates to a metallurgical energy technical field especially relates to a heating furnace gas pipe network system.
Background
The steel rolling heating furnace is an important device of a modern steel rolling mill, and the steel rolling heating furnace is used for heating a raw material plate blank to a steel rolling temperature required by a rolling mill. At present, a heating furnace in a steel mill generally adopts one or more mixed gases of blast furnace gas, converter gas and coke oven gas generated in the production process of raw materials as fuel. Blast furnace gas, converter gas and coke oven gas all belong to flammable and explosive gases, and major accidents can be caused by carelessness in the use process, so that serious consequences are brought to production enterprises.
In order to ensure the operation safety of the existing steel rolling heating furnace, when external energy media such as gas, electricity, water and compressed air are lower than a safety range, the heating furnace automatically cuts off the gas, but the pressure of a pipeline can be rapidly reduced to cause pipeline negative pressure, usually, protective nitrogen is introduced into a gas pipe network system to replace residual gas in the pipeline of the gas pipe network system, so that the gas is prevented from being tempered or exploded in the pipeline of the gas pipe network, and the safety of heating furnace equipment is ensured.
However, when the compressed air pressure is lower than the safety pressure, the system controls to cut off all the pneumatic cut-off valves on the gas pipe network, and simultaneously, protective gas is introduced into the gas pipe network, so that the pressure of the gas pipe network is increased sharply after the protective gas enters the gas pipe network (the nitrogen pressure is more than 10 times of the gas pressure), the gas pipe network is operated at an ultra-safety pressure for a long time, and leakage or weld joint welding failure and the like are easily generated at a weak position. If not discovered in time, accidents of personnel poisoning caused by gas leakage or fire explosion of gas pipelines can be caused in the production process.
Therefore, how to ensure that the gas pipe network cannot operate under the super-safe pressure for a long time is a technical problem to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been developed to provide a furnace gas piping system that overcomes or at least partially solves the above-mentioned problems.
The embodiment of the utility model provides a heating furnace gas pipe network system, include: the gas branch pipes are connected to an output port of the gas main pipe;
the gas inlet end of the gas main pipe is provided with a first pneumatic valve, a protective gas input pipeline is arranged between the first pneumatic valve and the output port of the gas main pipe, a second pneumatic valve is arranged on the protective gas input pipeline, the output end of each gas branch pipe is connected with a burner, a control valve is arranged between at least one burner and the output port of the gas main pipe, and the rest burners and the output port of the gas main pipe are arranged.
Furthermore, a gas diffusion pipe is arranged between the valve corresponding to each gas branch pipe and the output port of the main gas pipe, and a gas diffusion valve is arranged on each gas diffusion pipe;
further, a pneumatic regulating valve is arranged between the first pneumatic valve and the protective gas input pipeline.
Further, the protective gas is specifically nitrogen or argon.
Further, the first pneumatic valve is specifically a pneumatic butterfly valve or a pneumatic ball valve.
Further, the second pneumatic valve is specifically a pneumatic butterfly valve or a pneumatic ball valve.
Further, the third pneumatic valve is specifically a pneumatic butterfly valve or a pneumatic ball valve.
Further, the control valve is specifically a manual cut-off valve or an electric cut-off valve.
Further, the gas relief valve is a manual stop valve or an electric stop valve.
The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:
the utility model provides a heating furnace gas pipe network system, include and be responsible for and a plurality of gas branch pipe at original gas, original gas is responsible for the gas entry and is set up first pneumatic valve, be provided with protective gas input pipeline between the delivery outlet that first pneumatic valve and gas were responsible for, be provided with the second pneumatic valve on protective gas input pipeline, the nozzle is all connected to the output of every gas branch pipe, be provided with the control valve between the delivery outlet that at least one nozzle and gas were responsible for, the output opening nail scissors that all the other nozzles and gas were responsible for are provided with the third pneumatic valve, when compressed air is less than safe pressure, this first pneumatic valve automatic cutout, simultaneously, every third pneumatic valve also automatic cutout, this second pneumatic valve automatic opening and let in protective gas, wherein, the control valve keeps the open mode, so that the speed that the gas pressure in the heating gas pipe network system increases slows down, the gas pipe network system is prevented from operating at the working pressure, overpressure accidents are avoided, pressure can be relieved in time, the gas pipe network is effectively prevented from operating at the safety pressure for a long time, and the safe operation of the gas pipe network is guaranteed.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a schematic structural diagram of a heating furnace gas pipe network system in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The applicant has found that the reasons for long-term ultra-safe pressure operation of the gas pipe network are as follows: when the compressed air pressure is lower than the safety pressure, the gas pipe network system controls and cuts off all pneumatic cut-off valves on the gas pipe network, and meanwhile, protective gas is introduced into the gas pipe network, so that the gas pressure in the gas pipe network rises sharply, and meanwhile, the pressure cannot be released in time, and therefore, the gas pipe network runs at the ultra-safety pressure for a long time.
The embodiment of the utility model provides a heating furnace gas pipe network system, as shown in figure 1, include: the gas pipeline comprises a gas main pipe 10 and a plurality of gas branch pipes 20, wherein the plurality of gas branch pipes 20 are connected to an output port of the gas main pipe 10, and an output end of each gas branch pipe 20 is connected with a burner 201, so that gas enters from a gas inlet of the gas main pipe 10 in the direction of the gas pipeline network, passes through the gas main pipe, then respectively enters each gas branch pipe 20, and is discharged from the corresponding burner 201.
A first pneumatic valve 101 is arranged at the gas inlet end of the gas main pipe 10, a protective gas input pipeline 30 is arranged between the first pneumatic valve 101 and the output port of the gas main pipe, and gas firstly passes through the position of the first pneumatic valve 101 and then passes through the position of the protective gas input pipeline 30 on the gas main pipe 10. A second pneumatic valve 301 is provided on the shielding gas supply line 30.
The output end of each gas branch pipe 20 is connected with a burner 201, a control valve is arranged between at least one burner 201 and the output end of the gas main pipe, third pneumatic valves are arranged between the rest burners and the output ends of the gas main pipe, namely, valves are arranged between each burner 201 and the output end of the gas main pipe, at least one of the valves is a control valve 202, and other valves are third pneumatic valves 203. Specifically, any one or two of the gas branch pipes 20 may be selected, and the valve on the gas branch pipe may be the control valve 202, specifically, a manual stop valve or an electric stop valve may be used, where the manual stop valve may be a manual butterfly valve. When more valves are used, the control valve 202 is easy to cause gas backfire explosion, so that only one or two gas branch pipes 20 are selected. The third pneumatic valves 203 are adopted on the other residual gas branch pipes 20 in the plurality of gas branch pipes 20, so that when the compressed air is lower than the safe pressure, the third pneumatic valves 203 can be closed in time, and explosion caused by tempering of a large amount of gas is avoided.
In a specific using process, compressed air is used as a driving medium of the pneumatic valves, when the pressure of the compressed air is lower than the safety pressure, the first pneumatic valve 101 on the gas main pipe 10 is automatically cut off, meanwhile, the third pneumatic valves 203 on the gas branch pipes 20 are all automatically cut off, the second pneumatic valve 301 on the shielding gas input pipe 30 is automatically opened and shielding gas is introduced, at the moment, the at least one control valve 202 keeps an opening state to ensure that the speed of increasing the gas pressure is reduced when the shielding gas is introduced into the gas pipe network system, and the pressure can be slowly released due to the opening state of the at least one control valve 202. Thereby ensuring that the gas pipe network cannot be subjected to overpressure rapidly and cannot be operated for a long time.
In a preferred embodiment, a gas diffusion pipe 40 is arranged between the corresponding valve of each gas branch pipe 20 and the output port of the main gas pipe 20, a gas diffusion valve 401 is arranged on each gas diffusion pipe 40, the first pneumatic valve 101 on the main gas pipe 10 is automatically cut off, meanwhile, the third pneumatic valve 203 on the gas branch pipe 20 is automatically cut off, the second pneumatic valve 301 on the shielding gas input pipeline 30 is automatically opened and the shielding gas is introduced, and after at least one control valve 202 is kept in an opened state, the gas diffusion valve 401 on each gas diffusion pipe 40 is opened and the control valve is closed. Wherein, this gas bleeding valve 401 specifically is manual stop valve or electronic stop valve, and this manual stop valve can adopt manual butterfly valve.
Because at least one control valve 202 is in an open state, the protective gas filled in the gas pipe network is effectively decompressed, so that the gas pressure in the gas pipe network is not increased too fast, a user has enough time to control the gas diffusion valve 401 on each gas diffusion pipe 40 to be opened, and the problems that the gas pressure in the gas pipe network is increased too fast because the gas diffusion valve 401 on the gas diffusion pipe 40 is opened when the decompression is not timely, and the overpressure of the gas pipe network is too long in the process of opening the gas diffusion valve 401 on the gas diffusion pipe 40, and the overpressure accident is easily caused are avoided.
The control valve 202 is a manual cut-off valve or an electric cut-off valve, wherein the manual cut-off valve is a manual butterfly valve.
In a preferred embodiment, a pneumatic control valve is provided between the first pneumatic valve 101 and the protective gas supply line for controlling the flow of the supplied gas. The first pneumatic valve 101 may be a pneumatic butterfly valve or a pneumatic ball valve.
In a specific real-time mode, the protective gas is an inert gas such as nitrogen or argon, and specifically, when nitrogen is introduced, the pressure is about 500 kPa.
The second pneumatic valve is specifically a pneumatic ball valve or a pneumatic butterfly valve.
The third pneumatic valve is specifically a pneumatic ball valve or a pneumatic butterfly valve.
The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:
the utility model provides a heating furnace gas pipe network system, include and be responsible for and a plurality of gas branch pipe at original gas, original gas is responsible for the gas entry and is set up first pneumatic valve, be provided with protective gas input pipeline between the delivery outlet that first pneumatic valve and gas were responsible for, be provided with the second pneumatic valve on protective gas input pipeline, the nozzle is all connected to the output of every gas branch pipe, be provided with the control valve between the delivery outlet that at least one nozzle and gas were responsible for, the output opening nail scissors that all the other nozzles and gas were responsible for are provided with the third pneumatic valve, when compressed air is less than safe pressure, this first pneumatic valve automatic cutout, simultaneously, every third pneumatic valve also automatic cutout, this second pneumatic valve automatic opening and let in protective gas, wherein, the control valve keeps the open mode, so that the speed that the gas pressure in the heating gas pipe network system increases slows down, the gas pipe network system is prevented from operating at the working pressure, overpressure accidents are avoided, pressure can be relieved in time, the gas pipe network is effectively prevented from operating at the safety pressure for a long time, and the safe operation of the gas pipe network is guaranteed.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A heating furnace gas piping system, comprising: the gas branch pipes are connected to an output port of the gas main pipe;
the gas inlet end of the gas main pipe is provided with a first pneumatic valve, a protective gas input pipeline is arranged between the first pneumatic valve and the output port of the gas main pipe, a second pneumatic valve is arranged on the protective gas input pipeline, the output end of each gas branch pipe is connected with a burner, a control valve is arranged between at least one burner and the output port of the gas main pipe, and a third pneumatic valve is arranged between the rest of the burners and the output port of the gas main pipe.
2. The heating furnace gas piping network system according to claim 1, wherein a gas bleeding pipe is provided between each valve corresponding to each gas branch pipe and the outlet of the gas main pipe, and a gas bleeding valve is provided on each gas bleeding pipe.
3. The furnace gas piping system of claim 1, wherein a pneumatic regulating valve is disposed between the first pneumatic valve and the shielding gas input conduit.
4. The furnace gas piping system of claim 1, wherein the shielding gas is nitrogen or argon.
5. The furnace gas piping system of claim 1, wherein the first pneumatic valve is a pneumatic butterfly valve or a pneumatic ball valve.
6. The furnace gas piping system of claim 1, wherein the second pneumatic valve is a pneumatic butterfly valve or a pneumatic ball valve.
7. The furnace gas piping system of claim 1, wherein the third pneumatic valve is a pneumatic butterfly valve or a pneumatic ball valve.
8. The furnace gas piping system of claim 1, wherein the control valve is a manual shut-off valve or an electric shut-off valve.
9. The furnace gas piping system of claim 2, wherein the gas bleeding valve is a manual shut-off valve or an electric shut-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913918.3U CN210624172U (en) | 2019-06-17 | 2019-06-17 | Heating furnace gas pipe network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913918.3U CN210624172U (en) | 2019-06-17 | 2019-06-17 | Heating furnace gas pipe network system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210624172U true CN210624172U (en) | 2020-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920913918.3U Active CN210624172U (en) | 2019-06-17 | 2019-06-17 | Heating furnace gas pipe network system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210624172U (en) |
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2019
- 2019-06-17 CN CN201920913918.3U patent/CN210624172U/en active Active
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