CN220771111U - Control system for improving oxyhydrogen flame cutting section - Google Patents
Control system for improving oxyhydrogen flame cutting section Download PDFInfo
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- CN220771111U CN220771111U CN202322121426.XU CN202322121426U CN220771111U CN 220771111 U CN220771111 U CN 220771111U CN 202322121426 U CN202322121426 U CN 202322121426U CN 220771111 U CN220771111 U CN 220771111U
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- Prior art keywords
- pipe
- oxygen
- natural gas
- control system
- cutting
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- 238000005520 cutting process Methods 0.000 title claims abstract description 55
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000003345 natural gas Substances 0.000 claims abstract description 39
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000001301 oxygen Substances 0.000 claims abstract description 33
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000001257 hydrogen Substances 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000005868 electrolysis reaction Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Regulation And Control Of Combustion (AREA)
Abstract
The utility model relates to a control system for improving oxyhydrogen flame cutting sections, and belongs to the technical field of flame cutting. The oxygen pipe and the natural gas pipe are respectively connected with a control pipeline, E/P conversion units are respectively arranged on the control pipeline, the input ends of the E/P conversion units are respectively connected with a PLC control system in a signal mode, the outlet of the oxygen pipe is connected with the oxygen port of the cutting nozzle, the outlet of the natural gas pipe is connected with the natural gas port of the cutting nozzle, the oxygen-hydrogen mixed port of the cutting nozzle is communicated with the hydrogen generator through the oxygen-hydrogen mixed gas pipe, P/E conversion units are respectively arranged on the oxygen pipe and the natural gas pipe, and the output ends of the P/E conversion units are connected with the PLC control system in a signal mode. The stability of preheating and cutting the section in the flame cutting process is ensured, the situations of poor preheating and uneven cutting caused by unstable pressure of a gas medium in the section preheating and cutting process are avoided, and the safety is improved.
Description
Technical Field
The utility model relates to a control system for improving oxyhydrogen flame cutting sections, and belongs to the technical field of flame cutting.
Background
Oxyhydrogen flame cutting is a gas generating device which uses oxyhydrogen mixed gas generated by water electrolysis as fuel to replace cutting gas such as acetylene, propane, carbon three gas, liquefied gas and the like. The device generally comprises an electrolysis power supply, an electrolysis tank, a circulating system, a heat dissipation system, a water-gas separation system, a washing system, a tempering air cylinder, a control system and a cutting gun. The method is mainly used for on-line thermal cutting of blanks and materials (including round blanks), and the cut sections are required to be flat and free of slag bonding. The control system is generally used for controlling electrolysis current, pressure control, overcurrent, overload, overtemperature and other control functions and measuring and displaying various parameters, so that the control system for (oxy) hydrogen flame cutting is very important; because the domestic steel mill uses flame cutting to basically cut on-line flame after steelmaking continuous casting and casting, the requirement on the flame cutting section of (oxyhydrogen) is not high. At present, steel rolling online hot cutting is just popularized and used, so that the control system cannot adapt to the requirements of a steel mill.
The existing oxyhydrogen flame cutting has the following defects:
1. natural gas is used for preheating, the natural gas is connected with a main pipe of a steel mill, and the fluctuation of the pipe network causes the fluctuation of the pressure of the natural gas, so that poor preheating is caused;
2. in the (oxy-hydrogen) mixed cutting process, flame cutting is carried out by utilizing the oxy-hydrogen mixed gas generated by water electrolysis, and although the gas is generated in real time, the mixed gas is generated by water electrolysis again under the influence of a region and a pipeline, so that the cutting process has fluctuation and the cutting section is abnormal;
3. the natural gas has the potential safety hazard of tempering in the cutting process; meanwhile, once oxygen is leaked, no pressure is displayed in real time, and feedback is displayed, so that the safety risk of combustion supporting exists.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a control system for improving oxyhydrogen flame cutting sections aiming at the prior art, and avoiding the situations of poor preheating and uneven cutting caused by unstable pressure of a gas medium (natural gas and oxyhydrogen mixed gas) in the preheating and cutting processes of the sections; meanwhile, the pressure of energy media (natural gas and oxygen) is monitored, so that the safety is improved.
The utility model solves the problems by adopting the following technical scheme: the utility model provides an improve control system of oxyhydrogen flame cut section, includes oxygen pipe and natural gas pipe, connect control pipeline on oxygen pipe and the natural gas pipe respectively, be equipped with E/P conversion unit on the control pipeline respectively, E/P conversion unit input is connected with PLC control system signal respectively, the oxygen pipe export is connected with the oxygen mouth of cutting the mouth, the natural gas pipe export is connected with the natural gas port of cutting the mouth, the oxyhydrogen mixing gas port of cutting the mouth passes through oxyhydrogen mixing gas pipe and oxyhydrogen generator intercommunication, be equipped with P/E conversion unit on oxygen pipe and the natural gas pipe respectively, P/E conversion unit output and PLC control system signal connection.
The two control pipelines are also respectively communicated with a nitrogen pipe, and the nitrogen pipe is provided with a gate valve and an electromagnetic valve.
And electric valves are respectively arranged at the joints of the oxygen pipe, the natural gas pipe and the corresponding control pipelines.
The oxygen pipe inlet end and the natural gas pipe inlet end are respectively provided with an emergency cut-off valve.
Compared with the prior art, the utility model has the advantages that: the control system for improving oxyhydrogen flame cutting section ensures the stability of preheating and cutting section in the flame cutting process by monitoring, controlling and adjusting gas in real time, avoids the conditions of poor preheating and uneven cutting caused by unstable pressure of gas medium (natural gas and oxyhydrogen gas mixture) in the section preheating and cutting process, and reduces the manual polishing and aging strength of the object surface after the subsequent offline and the secondary treatment of the section; and the medium gas is detected and controlled on line in real time, so that the original single output control is eliminated, the output is adjusted to the closed loop control of output-real-time detection adjustment-output, and the safety is improved.
Drawings
FIG. 1 is a schematic diagram of a control system for improving oxyhydrogen flame cutting profile according to an embodiment of the present utility model;
in the figure, a PLC control system, a 2 control pipeline, a 3P/E conversion unit, a 4 nitrogen pipe, a 5 gate valve, a 6 electromagnetic valve, a 7E/P conversion unit, an 8 emergency cut-off valve, a 9 electric valve, a 10 oxygen pipe, an 11 natural gas pipe, a 12 cutting nozzle, a 13 oxyhydrogen mixed gas pipe and a 14 oxyhydrogen generator are arranged.
Description of the embodiments
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, a control system for improving oxyhydrogen flame cutting section in this embodiment includes an oxygen pipe 10 and a natural gas pipe 11, wherein the oxygen pipe 10 and the natural gas pipe 11 are respectively connected with a control pipeline 2, the control pipeline 2 is respectively provided with an E/P conversion unit 7, input ends of the E/P conversion units 7 are respectively connected with a PLC control system 1 in a signal manner, and the E/P conversion units 7 convert electrical signals into pneumatic signals. The outlet of the oxygen pipe 10 is connected with the oxygen port of the cutting nozzle 12, the outlet of the natural gas pipe 11 is connected with the natural gas port of the cutting nozzle 12, and the oxyhydrogen mixing port of the cutting nozzle 12 is communicated with the oxyhydrogen generator 14 through the oxyhydrogen mixing gas pipe 13. The outlet end of the oxygen pipe 10 and the outlet end of the natural gas pipe 11 are respectively provided with a P/E conversion unit 3, the output end of the P/E conversion unit 3 is connected with the PLC control system 1 in a signal manner, and the P/E conversion unit 3 converts a pneumatic signal into an electric signal.
Through increasing the input end (the electric signal is converted into the pneumatic signal) of the E/P conversion unit and the output end (the pneumatic signal is converted into the electric signal) of the P/E conversion unit, when the oxyhydrogen cutting process is carried out, an operator sets the corresponding standard natural gas pressure and oxygen pressure through a picture, an operation end computer firstly carries out accurate control on the valve opening of a corresponding valve through the electric signal given by the PLC control system through the E/P conversion unit (namely, the electric signal is converted into the pneumatic signal), and meanwhile, the electric signal is output and fed back to the operation end computer through the P/E conversion unit (namely, the pneumatic signal is converted into the electric signal with linear proportion) to display the natural gas pressure and the oxygen pressure; when the pressure fluctuation of the gas medium occurs in the process, the pressure fluctuation is transmitted and fed back to the computer at the operation end through the P/E conversion unit (namely, the pneumatic signal is converted into an electric signal with linear proportion), abnormal display is carried out, the PLC control system adjusts and accurately controls the valve opening of the corresponding valve through the E/P conversion unit (namely, the electric signal is converted into the pneumatic signal) according to the standard natural gas pressure and the standard oxygen pressure set by the picture after obtaining the natural gas pressure and the oxygen pressure, and the purpose of stabilizing the pressure is achieved.
The connection parts of the oxygen pipe 10 and the natural gas pipe 11 and the corresponding control pipeline 2 are respectively provided with an electric valve 9.
The two control pipelines 2 are also respectively communicated with a nitrogen pipe 4, and the nitrogen pipe 4 is provided with a gate valve 5 and an electromagnetic valve 6. The inlet end of the oxygen pipe and the inlet end of the natural gas pipe are respectively provided with an emergency cut-off valve 8. After the operation is finished, an operator gives out an instruction through the PLC control system, the nitrogen pipe is conducted after the electromagnetic valve is electrified, then the electric valve 9 respectively closes the oxygen pipe 10 and the natural gas pipe 11, and then the nitrogen is conveyed to the oxygen pipe and the natural gas pipe for purging, so that the safety risk is eliminated, and the safety is improved.
The method ensures the stability of the preheating and cutting section in the flame cutting process through the real-time monitoring and control adjustment of the gas, avoids the conditions of poor preheating and uneven cutting caused by unstable pressure of a gas medium (natural gas and oxyhydrogen mixed gas) in the section preheating and cutting process, and reduces the manual polishing and aging strength of the surface of a real object after the subsequent offline and the secondary treatment of the section; and the medium gas is detected and controlled on line in real time, so that the original single output control is eliminated, the output is adjusted to the closed loop control of output-real-time detection adjustment-output, and the safety is improved.
In addition to the above embodiments, the present utility model also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present utility model.
Claims (4)
1. The utility model provides an improve control system of oxyhydrogen flame cut section which characterized in that: the oxygen pipe and the natural gas pipe are respectively connected with a control pipeline, E/P conversion units are respectively arranged on the control pipeline, the input ends of the E/P conversion units are respectively connected with a PLC control system in a signal mode, the outlet of the oxygen pipe is connected with the oxygen port of the cutting nozzle, the outlet of the natural gas pipe is connected with the natural gas port of the cutting nozzle, the oxygen-hydrogen mixed port of the cutting nozzle is communicated with the hydrogen generator through the oxygen-hydrogen mixed gas pipe, P/E conversion units are respectively arranged on the oxygen pipe and the natural gas pipe, and the output ends of the P/E conversion units are connected with the PLC control system in a signal mode.
2. The control system for improving oxyhydrogen flame cutting profile according to claim 1, characterized in that: the two control pipelines are also respectively communicated with a nitrogen pipe, and the nitrogen pipe is provided with a gate valve and an electromagnetic valve.
3. The control system for improving oxyhydrogen flame cutting profile according to claim 1, characterized in that: and electric valves are respectively arranged at the joints of the oxygen pipe, the natural gas pipe and the corresponding control pipelines.
4. The control system for improving oxyhydrogen flame cutting profile according to claim 1, characterized in that: the oxygen pipe inlet end and the natural gas pipe inlet end are respectively provided with an emergency cut-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322121426.XU CN220771111U (en) | 2023-08-08 | 2023-08-08 | Control system for improving oxyhydrogen flame cutting section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322121426.XU CN220771111U (en) | 2023-08-08 | 2023-08-08 | Control system for improving oxyhydrogen flame cutting section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220771111U true CN220771111U (en) | 2024-04-12 |
Family
ID=90601518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322121426.XU Active CN220771111U (en) | 2023-08-08 | 2023-08-08 | Control system for improving oxyhydrogen flame cutting section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220771111U (en) |
-
2023
- 2023-08-08 CN CN202322121426.XU patent/CN220771111U/en active Active
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