Hydrogen-oxygen cutting system

Abstract

The invention discloses an oxyhydrogen cutting system, which comprises an oxyhydrogen preparation unit, a water-seal fire-retardant unit, a water-gas separation unit, a safety controllable and fire-cutoff unit and a cutting unit, and oxyhydrogen mixed gas generated by the oxyhydrogen preparation unit can sequentially pass through the water-seal fire-retardant unit, the water-gas separation unit and the safety controllable and fire-cutoff unit to flow to the cutting unit; the water seal fire retardant unit can cooperate with the safety controllable and fire cutoff unit to block backfire flames in a pipeline together, the backfire flames are prevented from flowing in the pipeline to cause the backfire flames to burn components in the system, the safety controllable and fire cutoff unit can also achieve connection and disconnection of hydrogen and oxygen mixed gas, quantitative conveying or timed conveying is achieved, and the service life of the system is prolonged. The cutting unit comprises a flame cutting machine and a cutting trolley, the cutting gun head is assembled on the cutting trolley so that workers can replace and overhaul the cutting gun head conveniently, and a cooler is further arranged on the cutting trolley and suitable for cooling the cutting gun head.

Description

Technical Field

[0001] The present application relates to the technical field of continuous casting cutting production, and in particular to an oxyhydrogen cutting system. Background Art

[0002] The steel industry is the industry with the largest carbon emissions in the manufacturing industry. The steel industry needs to transform and upgrade, and the transformation from high energy consumption and high emissions to low energy consumption and low emissions is imperative.

[0003] At present, most of the continuous casting and cutting of steel in the metallurgical industry uses propane or a mixture of natural gas and oxygen for continuous casting and cutting. Due to many factors, these two continuous casting and cutting methods have the following defects: 1. The preparation costs of propane, natural gas and oxygen are relatively high. The use of propane or a mixture of natural gas and oxygen as the fuel for continuous casting and cutting is relatively uneconomical and easily leads to energy waste; 2. As by-products of petroleum products, propane and natural gas need to be prepared at specific sites and then distributed to various steel mills. However, they need to be strictly implemented in accordance with standards during storage and transportation, which results in cumbersome audits and high operation and maintenance costs; 3. During continuous casting and cutting, there is a lot of smoke and dust around the cutting equipment, which will produce a large amount of carbon dioxide; 4. The cutting gun nozzle of the cutting equipment needs to be replaced frequently, and the heat-affected zone is large, which can easily lead to increased cutting seams, increased burrs, and uneven fragments. Summary of the invention

[0004] One purpose of the present application is to provide an oxyhydrogen cutting system to solve the problems of high carbon emissions from steel cutting in the existing metallurgical industry, high gas storage and transportation costs, etc.

[0005] In order to achieve the above objectives, the technical solution adopted in this application is: a hydrogen-oxygen cutting system, comprising:

[0006] A hydrogen and oxygen preparation unit, the hydrogen and oxygen preparation unit comprises a centralized water supply device and a hydrogen and oxygen generating device, the centralized water supply device comprises a raw water tank and a reverse osmosis processor, the raw water tank is suitable for storing domestic water and industrial water, the reverse osmosis processor is suitable for treating the domestic water and industrial water in the raw water tank into pure water, the hydrogen and oxygen generating device comprises an electrolytic cell and a water cooling circulation system, the electrolytic cell is suitable for electrolyzing an electrolyte formed by a mixture of pure water and electrolyte to obtain a hydrogen and oxygen mixed gas, and the water cooling circulation system is suitable for cooling the electrolyte in the electrolytic cell;

[0007] A water-sealed fire-blocking unit, the water-sealed fire-blocking unit is connected to the next level of the hydrogen-oxygen preparation unit, the water-sealed fire-blocking unit comprises a fire-blocking tank body for storing a liquid medium, a fire-blocking air inlet and a fire-blocking air outlet are respectively arranged in the length direction of the fire-blocking tank body, the hydrogen-oxygen mixture can flow in from the fire-blocking air inlet, and flow out from the fire-blocking air outlet after passing through the liquid medium, a fire-blocking net is also arranged in the fire-blocking tank body, the fire-blocking net is arranged close to one side of the fire-blocking air inlet, and the fire-blocking net is suitable for finely cutting the hydrogen-oxygen mixture;

[0008] A water-gas separation unit, the water-gas separation unit is connected to the next level of the water seal fire-blocking unit, and the water-gas separation unit is suitable for separating water gas from the hydrogen-oxygen mixed gas;

[0009] A safety controllable and fire-off unit, the safety controllable and fire-off unit is connected to the next level of the water-gas separation unit, the safety controllable and fire-off unit comprises a fire-off module and a fire-blocking module, the fire-off module and the fire-blocking module are both connected to a control circuit board, the control circuit board is suitable for controlling the fire-off module and the fire-blocking module to be turned on or off independently, so as to disconnect the pipeline when cutting is interrupted, cutting is completed or a flashback flame appears in the pipeline;

[0010] And a cutting unit, the cutting unit is connected to the next level of the safety energy control and fire-off unit, the cutting unit and the safety energy control and fire-off unit are connected through a drag chain hose, and the cutting unit is suitable for igniting a hydrogen-oxygen mixture to cut the metal to be processed.

[0011] Preferably, the water-cooling circulation system includes a circulation pump, a filter, a radiator and a cooling water tank. The circulation pump, the filter and the radiator are all connected to the electrolytic cell by pipelines. The circulation pump can drive the electrolyte to circulate between the filter, the radiator and the electrolytic cell. The cooling water tank pipeline is connected to the radiator. The coolant in the cooling water tank can flow into the radiator to perform heat exchange with the electrolyte in the radiator to cool the electrolyte.

[0012] As another preferred embodiment, a flow regulating valve is provided on the pipeline between the radiator and the cooling water tank, and a temperature sensor is provided in the electrolytic cell. The flow regulating valve and the temperature sensor are both circuit-connected to the control circuit board. The temperature sensor is suitable for obtaining the temperature of the electrolyte in the electrolytic cell and converting it into an electrical signal for transmission to the control circuit board. The control circuit board is suitable for comparing the electrical signal with a preset value to adjust the opening and closing degree of the flow regulating valve, thereby adjusting the flow rate of the coolant.

[0013] Further preferably, the fire-blocking air inlet is arranged at the bottom of the fire-blocking tank body, the fire-blocking air outlet is arranged at the top of the fire-blocking tank body, the fire-blocking net is arranged inside the fire-blocking tank body along the radial direction of the fire-blocking tank body, the fire-blocking net is implemented as a microporous metal net, and the micropore diameter of the fire-blocking net is 0.1 mm to 0.3 mm.

[0014] Furthermore, the water vapor separation unit includes a separation tank body, which is provided with a separation air inlet and a separation air outlet, the separation air inlet is arranged on the side wall of the separation tank body, the separation air inlet is arranged on the top of the separation tank body, and a return plate is arranged in the separation tank body, the return plate is an inverted frustum structure, the interior of the return plate is hollow and openings are arranged at both ends, the top opening of the return plate is connected to the separation air outlet, the height of the separation air inlet is higher than the bottom height of the return plate, and a drain outlet is also arranged at the bottom of the separation tank body.

[0015] Furthermore, the fire-blocking module includes two fire-blocking pipelines arranged in parallel, and the air inlet and outlet ends of each fire-blocking pipeline are respectively provided with a pipeline ball valve, and the pipeline ball valve can be operated to be turned on or off so that the hydrogen-oxygen mixture can flow in one of the two fire-blocking pipelines.

[0016] Furthermore, the fire arrester pipeline includes a flame arrester and a flame arrester switch arranged between the two pipeline ball valves, the flame arrester is arranged on the air outlet side of the flame arrester switch, the flame arrester switch is connected to the control circuit board, a flashback detector is arranged in the flame arrester, the flame arrester switch and the flashback detector are both electrically connected to the control circuit board, the flashback detector is suitable for detecting whether there is a flashback flame in the flame arrester and converting it into an electrical signal to transmit to the control circuit board, and the control circuit board is suitable for controlling the flame arrester to disconnect the pipeline when the electrical signal reaches a preset value.

[0017] Furthermore, the fire cutoff module includes a main fire cutoff pipeline and a spare fire cutoff pipeline, the main fire cutoff pipeline is provided with a fire cutoff switch, the fire cutoff switch is connected to the control circuit board, the control circuit board is suitable for controlling the closing or opening of the fire cutoff switch to control the on and off of the hydrogen-oxygen mixture, and the air inlet side and the air outlet side of the fire cutoff switch are respectively provided with inspection ball valves, and the inspection ball valve is in a normally closed state. The spare pipe fire cutoff pipeline is arranged in parallel with the main fire cutoff pipeline, and a spare ball valve is provided on the spare fire cutoff pipeline, and the spare ball valve is in a normally open state.

[0018] Furthermore, the air outlet side of the flame arrester is connected to the pipeline ball valve via a chuck hose, and the air inlet side of the spare ball valve is connected to the flame arrester module via the chuck hose.

[0019] Furthermore, the cutting unit includes a flame cutting machine and a cutting trolley, the cutting trolley is equipped with a cutting gun head, the cutting gun head is connected to the flame cutting machine through the drag chain hose, and the cutting trolley is also provided with a cooler, the cooler is connected to the cutting gun head, and the cooler contains a coolant for cooling the cutting gun head.

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] The oxyhydrogen cutting system provided by the present application purifies domestic water and industrial water through a reverse osmosis processor, and produces pure oxyhydrogen mixture gas by electrolyzing water through an electrolyzer. The product of the oxyhydrogen mixture gas after combustion is only water, without pollutants such as smoke and carbon dioxide. Compared with fuels such as propane and natural gas, the oxyhydrogen mixture gas has the advantages of being green, environmentally friendly, low cost, and good economy. The oxyhydrogen cutting system provided by the present application prevents the spread of the flashback flame through a safe energy control and fire-off unit and a water-seal fire-blocking unit. When a flashback flame appears in the pipeline, the fire-blocking module detects the flame signal and converts the flame signal into an electrical signal and feeds it back to the control circuit board. The control circuit board controls the fire-blocking module to shut down according to the electrical signal to cut off the oxyhydrogen mixture gas. At the same time, the water-seal fire-blocking unit can play a role of passive fire-blocking. The oxyhydrogen mixture gas needs to pass through a liquid medium when flowing in the water-seal fire-blocking unit. The liquid medium can block the flashback flame, further improving the anti-flashback effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the oxyhydrogen cutting system of this application.

[0023] Figure 2 This is a schematic diagram of the oxyhydrogen production unit in the oxyhydrogen cutting system of the present application.

[0024] Figure 3 This is a schematic diagram of the water seal fire arresting unit in the oxyhydrogen cutting system of the present application.

[0025] Figure 4 This is a schematic diagram of the water-gas separation unit in the hydrogen-oxygen cutting system of the present application.

[0026] Figure 5 This is a schematic diagram of the safety energy control and flameout unit in the oxyhydrogen cutting system of the present application.

[0027] Figure 6 This is a schematic diagram of the flame arrester module in the oxyhydrogen cutting system of the present application.

[0028] Figure 7 This is a schematic diagram of the flameout module in the oxyhydrogen cutting system of the present application.

[0029] Figure 8 This is a schematic diagram of a cutting unit in the oxyhydrogen cutting system of the present application.

[0030] In the figure: 100, hydrogen and oxygen preparation unit; 110, centralized water supply device; 111, raw water tank; 112, reverse osmosis processor; 120, hydrogen and oxygen generating device; 121, electrolyzer; 122, circulation pump; 123, filter; 124, radiator; 125, cooling water tank; 126, flow regulating valve; 127, temperature sensor; 200, water seal fireproof unit; 210, fireproof tank; 220, fireproof cavity; 230, fireproof air inlet; 240, fireproof air outlet; 250, fireproof net; 300, water-gas separation unit; 310, separation Tank body; 320, separation air inlet; 330, separation air outlet; 340, return plate; 350, drain outlet; 400, safety energy control and fire-off unit; 410, fire-blocking module; 411, pipeline ball valve; 412, flame arrester; 413, flame-blocking switch; 414, flashback detector; 420, fire-off module; 421, fire-off switch; 422, spare ball valve; 423, maintenance ball valve; 500, cutting unit; 510, flame cutting machine; 520, cutting carriage; 530, cutting gun head; 540, cooler; 600, control circuit board. DETAILED DESCRIPTION

[0031] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0034] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0035] like Figure 1-8 As shown, the present application provides an oxyhydrogen cutting system, including an oxyhydrogen preparation unit 100, a water seal fire blocking unit 200, a water-gas separation unit 300, a safety energy control and fire extinguishing unit 400 and a cutting unit 500 which are connected in sequence.

[0036] like Figure 2 As shown, the hydrogen and oxygen production unit 100 includes a centralized water supply device 110 and a hydrogen and oxygen generating device 120 .

[0037] The centralized water supply device 110 includes a raw water tank 111 and a reverse osmosis processor 112. The raw water tank 111 is used to store raw water such as domestic water and industrial water. The raw water in the raw water tank 111 is supplied to the reverse osmosis processor 112 through a pipeline. The raw water supplied to the reverse osmosis processor 112 first passes through a pretreatment device such as a multi-media filter, a quartz sand filter, and an activated carbon filter to remove impurities such as suspended matter, colloids, and organic matter in the raw water. The pretreated raw water is pressurized by a high-pressure pump to reach the pressure required by the reverse osmosis membrane. The high pressure allows water molecules to pass through a semipermeable membrane with selective permeability, thereby retaining the remaining impurities in the raw water on one side of the reverse osmosis membrane, and pure water is obtained on the other side of the reverse osmosis membrane.

[0038] The hydrogen and oxygen generating device 120 includes an electrolytic cell 121 and a water cooling circulation system. The pure water obtained by reverse osmosis treatment flows into the electrolytic cell 121 and mixes with the electrolyte in the electrolytic cell 121 to form an electrolyte. The electrolyte formed by the mixture of the electrolyte and the pure water has better conductivity than pure water, so it has a better effect during electrolysis. The electrolytic cell 121 adopts an integrated series-parallel electrolytic cell, a fully enclosed cylindrical structure, high sealing, and a high nickel alloy material for the plate. The hydrogen and oxygen electrolysis efficiency is high and the service life is long. The electrodes are sealed with EPDM rubber. The water-cooling circulation system is external to the electrolytic cell 121, and includes a circulation pump 122, a filter 123, a radiator 124, and a cooling water tank 125. The circulation pump 122, the filter 123, and the radiator 124 are all connected to the electrolytic cell 121 by pipelines. The electrolyte in the electrolytic cell 121 can circulate between the electrolytic cell 121 and the radiator 124 under the action of the circulation pump 122. The electrolyte can flow out of the electrolytic cell 121, pass through the filter 123 and the radiator 124 in sequence, and then return to the electrolytic cell 121. The radiator 124 is in communication with the cooling water tank 125, and the cooling water tank 125 contains a coolant. The coolant can flow to the radiator 124 to perform heat exchange with the electrolyte flowing through the radiator 124, and the electrolyte is cooled to achieve the effect of cooling the electrolytic cell 121.

[0039] Furthermore, a flow regulating valve 126 is provided on the pipeline between the radiator 124 and the cooling water tank 125, and a temperature sensor 127 is provided in the electrolytic cell 121. The flow regulating valve 126 and the temperature sensor 127 are both circuit-connected to the control circuit board 600. The temperature sensor 127 is suitable for obtaining the temperature of the electrolyte in the electrolytic cell 121 and converting it into an electrical signal for transmission to the control circuit board 600. The control circuit board 600 compares the received electrical signal with a preset value, and adjusts the opening and closing size of the flow regulating valve 126 according to the comparison result. When the temperature of the electrolyte in the electrolytic cell 121 is higher than the set working temperature, the control circuit board 600 controls the flow regulating valve 126 to open; when the temperature of the electrolyte in the electrolytic cell 121 is lower than the set working temperature, the control circuit board 600 controls the flow regulating valve 126 to close. At the same time, the flow regulating valve 126 controls the opening and closing size according to the temperature of the electrolytic cell 121, so that the flow rate of the coolant matches the calorific value of the electrolytic cell 121.

[0040] like Figure 3 As shown, the water-sealed fire-blocking unit 200 includes a fire-blocking tank body 210, which is cylindrical. A fire-blocking chamber 220 for storing a liquid medium is provided inside the fire-blocking tank body 210. A fire-blocking air inlet 230 and a fire-blocking air outlet 240 are provided on the fire-blocking tank body 210. The fire-blocking air inlet 230 is arranged on the side wall at the bottom of the fire-blocking tank body 210 and is communicated with the fire-blocking chamber 220. The fire-blocking air outlet 240 is arranged on the top wall of the fire-blocking tank body 210 and is communicated with the fire-blocking chamber 220. The hydrogen-oxygen mixture can flow into the fire-blocking chamber 220 from the fire-blocking air inlet 230, then rise in the liquid medium to reach the upper part of the fire-blocking chamber 220, and then flow out from the fire-blocking air outlet 240. The liquid medium can block the burning hydrogen-oxygen mixture, thereby preventing the burning hydrogen-oxygen mixture from flowing toward the hydrogen-oxygen preparation unit 100.

[0041] The liquid medium is a flame retardant liquid with a large specific heat capacity, which may be but is not limited to water, and can block the flame. The liquid medium does not fill the entire fire retardant cavity 220, and the liquid level of the liquid medium can be adjusted according to actual conditions within the range specified by the safety index parameters.

[0042] A fire-blocking net 250 is also provided in the fire-blocking cavity 220. The fire-blocking net 250 is arranged in the fire-blocking cavity 220 along the radial direction of the fire-blocking tank body 210, and is located on the side of the fire-blocking cavity 220 close to the fire-blocking air inlet 230. The fire-blocking net 250 is a multi-microporous metal net. The fire-blocking net 250 is provided with many penetrating micropores, and the pore size of the micropores is 0.1 mm to 0.3 mm. When the hydrogen-oxygen mixture rises in the liquid medium, it will pass through the fire-blocking net 250, and the hydrogen-oxygen mixture will be cut and refined by the micropores on the fire-blocking net 250, thereby preventing the hydrogen-oxygen mixture from generating continuous large-particle bubbles in the liquid medium.

[0043] When flashback occurs, the burning hydrogen-oxygen mixture will spread along the pipeline to the liquid medium. If there are continuous large-particle bubbles in the liquid medium at this time, the burning hydrogen-oxygen mixture will pass through the liquid medium through the continuous large-particle bubbles, causing the burning hydrogen-oxygen mixture to spread above the liquid medium, and then the burning hydrogen-oxygen mixture will spread further to the upper-level equipment from the flame-blocking outlet 240. The setting of the flame-blocking net 250 can refine and cut the hydrogen-oxygen mixture, prevent the burning hydrogen-oxygen mixture from flashing back through the continuous large-particle bubbles, and ensure the flame retardant effect of the liquid medium.

[0044] like Figure 4 As shown, the water-gas separation unit 300 is connected to the next level of the water seal fire-blocking unit 200, and the water-gas separation unit 300 includes a separation tank body 310, and the separation tank body 310 is provided with a separation air inlet 320 and a separation air outlet 330, the separation air inlet 320 is arranged on the side wall of the separation tank body 310, and the separation air outlet 330 is arranged on the top of the separation tank body 310, and a return plate 340 is arranged inside the separation tank body 310, and the return plate 340 is an inverted truncated cone structure, the interior of the return plate 340 is hollow and has openings at both ends, the top opening of the return plate 340 is connected to the separation air outlet 330, and the height position of the separation air inlet 320 is higher than the bottom height of the return plate 340, thereby When the hydrogen-oxygen mixture containing water vapor flows into the separation tank body 310 from the separation air inlet 320, the hydrogen-oxygen mixture containing water vapor hits the return plate 340. The hydrogen-oxygen mixture is affected by the return plate 340 to change its flow in multiple directions, thereby separating small droplets in the hydrogen-oxygen mixture. At the same time, since the internal space of the separation tank body 310 is large, the flow rate of the hydrogen-oxygen mixture is reduced, and the small droplets on the return plate 340 have enough time to condense into large droplets. The large droplets flow downward along the return plate 340 and are collected at the bottom of the separation tank body 310, thereby realizing the separation of water vapor and the hydrogen-oxygen mixture. A drain port 350 is provided at the bottom of the separation tank body 310, and the condensed water vapor can be discharged to the outside of the separation tank body 310 through the drain port 350.

[0045] Furthermore, if Figure 5-7 As shown, the safety energy control and fire-off unit 400 is connected to the next level of the water-gas separation unit 300, and the safety energy control and fire-off unit 400 includes a fire-blocking module 410 and a fire-off module 420. The fire-blocking module 410 and the fire-off module 420 are both circuit-connected to the control circuit board 600. The control circuit board 600 is suitable for controlling the fire-off module 420 and the fire-blocking module 410 to be turned on or off independently. The fire-off module 420 is suitable for disconnecting the pipeline during cutting breaks and at the end of cutting, and the fire-blocking module 410 is suitable for disconnecting the pipeline when a flashback flame appears in the pipeline.

[0046] Specifically, the fire-blocking module 410 includes two fire-blocking pipelines arranged in parallel, and pipeline ball valves 411 are provided at the air inlet and air outlet ends of the fire-blocking pipelines. The pipeline ball valves 411 can be operated to close or disconnect so that hydrogen and oxygen can flow in one of the two fire-blocking pipelines. One of the two fire-blocking pipelines arranged in parallel serves as the main fire-blocking pipeline, and the other serves as the spare fire-blocking pipeline, that is, the pipeline ball valve 411 on the main fire-blocking pipeline is usually closed, and the pipeline ball valve 411 on the spare fire-blocking pipeline is usually disconnected. The hydrogen-oxygen mixture can flow to the fire-off module 420 through the main fire-blocking pipeline. When the parts on the main fire-blocking pipeline are used for a long time or fail and need to be replaced, the user can disconnect the two pipeline ball valves 411 on the main fire-blocking pipeline and close the two pipeline ball valves 411 on the spare fire-blocking pipeline. Then, the hydrogen-oxygen mixture can flow to the fire-off module 420 through the spare fire-blocking pipeline, so that the fire-blocking module 410 can be inspected and maintained without stopping the machine, thus avoiding the damage caused by system shutdown.

[0047] The fire arrester pipeline includes a flame arrester 412 and a flame arrester switch 413 between two pipeline ball valves 411. The flame arrester 412 is arranged on the gas outlet side of the flame arrester switch 413. The flame arrester switch 413 is connected to the control circuit board 600. The control circuit board 600 can turn on or off the fire arrester pipeline by controlling the flame arrester switch 413 to be closed or disconnected. In some preferred embodiments, the flame arrester switch 413 is a flame arrester solenoid valve, which is connected to the control circuit board 600 circuit. The flame arrester 412 is a dry flame arrester. The dry flame arrester can use the principle of flame quenching in a narrow gap to bend and overlap the flame arrester material into a flame extinguishing layer with a very small gap. The burning hydrogen-oxygen mixture will be extinguished after flowing through the dry flame arrester.

[0048] Furthermore, a flashback detector 414 is also provided on the fire arrester pipeline. The flashback detector 414 is provided in the flame arrester 412. The flashback detector 414 is connected to the control circuit board 600 circuit. The flashback detector 414 is suitable for detecting whether there is a flashback flame in the flame arrester 412 and converting the flame signal into an electrical signal and feeding it back to the control circuit board 600. The control circuit board 600 controls the fire arrester switch 413 according to the received electrical signal. Specifically, when a flashback flame is generated in the fire arrester pipeline, the flashback detector 414 can detect the flame signal and convert the flame signal into a high electrical signal and transmit it to the control circuit board 600. After receiving the high electrical signal, the control circuit board 600 controls the fire arrester switch 413 to be disconnected, and the hydrogen-oxygen mixture is cut off; when no flashback flame is generated in the fire arrester pipeline, the flashback detector 414 cannot detect the flame signal and transmits a low electrical signal to the control circuit board 600. The control circuit board 600 controls the fire arrester switch 413 to be turned on according to the low electrical signal, and the hydrogen-oxygen mixture can flow along the pipeline to the fire-off module 420.

[0049] In addition, when the flashback detector 414 detects a flame signal and converts the flame signal into a high-voltage electrical signal and feeds it back to the control circuit board 600, the control circuit board 600 will also record the number of flame signals detected by the flashback detector 414. Since the flame arrester 412 has a service life, the control circuit board 600 records the number of times the flashback detector 414 detects the flame signal, and the number of times the flame arrester 412 has blocked the flame can be known. When the number of times the flame arrester 412 has blocked the flame is close to the upper limit of the number of times the flame arrester 412 has blocked the flame, the control circuit board 600 can issue an alarm to remind the staff to replace the flame arrester 412. When replacing the flame arrester 412, the staff can disconnect the two pipeline ball valves 411 on the main flame arrester pipeline and close the two pipeline ball valves 411 on the spare flame arrester pipeline, so that the hydrogen-oxygen mixture flows from the spare flame arrester pipeline to the fire-off module 420. Due to the particularity of the continuous casting and cutting process, equipment downtime will cause a waste of time and money costs. The setting of the main fire-blocking pipeline and the spare fire-blocking pipeline enables the staff to replace the flame arrester 412 on the main fire-blocking pipeline while the hydrogen and oxygen can flow to the subsequent process equipment through the spare fire-blocking pipeline, thus realizing non-stop maintenance.

[0050] In some preferred embodiments, the gas outlet side of the flame arrester 412 is connected to the pipeline ball valve 411 through a chuck hose, which is a flexible hose with advantages such as good flexibility, light weight, and high temperature resistance. Even if there is an installation error in the distance between the flame arrester 412 and the pipeline ball valve 411, it does not affect the installation of the flame arrester 412. At the same time, since the flame arrester 412 has a service life, the use of a chuck hose connection between the flame arrester 412 and the pipeline ball valve 411 can simplify the difficulty of disassembly and installation of the flame arrester 412 and shorten the operation time of replacing the flame arrester 412.

[0051] Furthermore, the fire cutoff module 420 includes a main fire cutoff pipeline and a spare fire cutoff pipeline. The main fire cutoff pipeline is provided with a fire cutoff switch 421. The fire cutoff switch 421 is circuit-connected to the control circuit board 600. The control circuit board 600 can control the fire cutoff switch 421 to close or open to control the on and off of the hydrogen-oxygen mixture. The spare fire cutoff pipeline is arranged in parallel with the main fire cutoff pipeline. A spare ball valve 422 is arranged on the spare fire cutoff pipeline. The spare ball valve 422 is connected to the fire arresting module 410 by a chuck hose. The spare fire cutoff pipeline can replace the main fire cutoff pipeline when a failure occurs in the main fire cutoff pipeline.

[0052] Two inspection ball valves 423 are arranged on the main fire-off pipeline, and the two inspection ball valves 423 are respectively arranged on the air inlet side and the air outlet side of the fire-off switch 421. The two inspection ball valves 423 are in a normally closed state, and the spare ball valve 422 is in a normally open state. That is to say, when the fire-off module 420 operates normally, the two inspection ball valves 423 on the main fire-off pipeline are configured to be in a closed state, and the spare ball valve 422 on the spare fire-off pipeline is configured to be in an open state, the main fire-off pipeline is connected, and the spare fire-off pipeline is disconnected, and the hydrogen-oxygen mixture can flow from the main fire-off pipeline to the cutting unit 500; when the main fire-off pipeline fails, the staff can switch the inspection ball valve 423 to the open state, and the spare ball valve 422 on the spare fire-off pipeline can be switched to a closed state by the control circuit board 600 or by the staff, and the hydrogen-oxygen mixture can flow from the spare fire-off pipeline to the cutting unit 500, and the staff can inspect the main fire-off pipeline.

[0053] In some preferred embodiments, the flame-off switch 421 is a flame-off solenoid valve. Compared with other types of switches, the solenoid valve has high reliability. It is mainly operated by electromagnetic principle, so that accurate and reliable control can be achieved. In addition, the solenoid valve has a simple structure and a low failure rate. It has good tolerance to extremely high or low temperature working environments and can operate stably. At present, when the hydrogen-oxygen flame cuts the continuous casting billet, the hydrogen-oxygen flame is in a long-open flame state, that is, the hydrogen-oxygen flame is always in a burning state during the actual cutting and non-cutting time, which not only leads to the waste of hydrogen-oxygen, but also shortens the service life of the cutting nozzle. The control circuit board 600 in the system of the present application can control the fire cutoff switch 421 to be closed or opened, so as to realize the conduction and shutoff of the hydrogen-oxygen mixture. When the device actually cuts metals such as steel, the control circuit board 600 controls the fire cutoff switch 421 to be closed, and the hydrogen-oxygen mixture can flow to the cutting unit 500 through the fire cutoff pipeline. When the cutting is completed and waiting for the next cutting, the control circuit board 600 controls the fire cutoff switch 421 to be opened, and the hydrogen-oxygen mixture is blocked at the fire cutoff switch 421. Specifically, the control circuit board 600 can control the fire cutoff switch 421 by quantitative delivery of hydrogen and oxygen or timed delivery to realize automatic fire cutoff.

[0054] like Figure 1 and 8As shown, the cutting unit 500 is connected to the next level of the safety energy control and fire-off unit 400, and the cutting unit 500 includes a flame cutting machine 510 and a cutting trolley 520. The flame cutting machine 510 is connected to the upper level equipment through a drag chain hose, and the cutting trolley 520 is also connected to the flame cutting machine 510 through a drag chain hose. The diameter of the drag chain hose between the flame cutting machine 510 and the upper level equipment is larger than the diameter of the drag chain hose between the cutting trolley 520 and the flame cutting machine 510. The diameter of the drag chain hose between the flame cutting machine 510 and the upper level equipment is Ф16, and the diameter of the drag chain hose between the cutting trolley 520 and the flame cutting machine 510 is Ф13. The cutting carriage 520 is equipped with a cutting gun head 530, to which a hydrogen-oxygen mixture is supplied. The cutting gun head 530 is suitable for igniting the hydrogen-oxygen mixture to cut the metal blank to be cut. The cutting carriage 520 is also provided with a cooler 540, in which a coolant for cooling the cutting gun head 530 is placed to prevent the cutting gun head 530 from overheating after working for a long time, thereby affecting the cutting quality.

[0055] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and the description only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A hydrogen-oxygen cutting system, characterized in that: include: A hydrogen and oxygen preparation unit, the hydrogen and oxygen preparation unit comprises a centralized water supply device and a hydrogen and oxygen generating device, the centralized water supply device comprises a raw water tank and a reverse osmosis processor, the raw water tank is suitable for storing domestic water and industrial water, the reverse osmosis processor is suitable for treating the domestic water and industrial water in the raw water tank into pure water, the hydrogen and oxygen generating device comprises an electrolytic cell and a water cooling circulation system, the electrolytic cell is suitable for electrolyzing an electrolyte formed by a mixture of pure water and electrolyte to obtain a hydrogen and oxygen mixed gas, and the water cooling circulation system is suitable for cooling the electrolyte in the electrolytic cell; A water-sealed fire-blocking unit, the water-sealed fire-blocking unit is connected to the next level of the hydrogen-oxygen preparation unit, the water-sealed fire-blocking unit comprises a fire-blocking tank body for storing a liquid medium, a fire-blocking air inlet and a fire-blocking air outlet are respectively arranged in the length direction of the fire-blocking tank body, the hydrogen-oxygen mixture can flow in from the fire-blocking air inlet, and flow out from the fire-blocking air outlet after passing through the liquid medium, a fire-blocking net is also arranged in the fire-blocking tank body, the fire-blocking net is arranged close to one side of the fire-blocking air inlet, and the fire-blocking net is suitable for finely cutting the hydrogen-oxygen mixture; A water-gas separation unit, the water-gas separation unit is connected to the next level of the water seal fire-blocking unit, and the water-gas separation unit is suitable for separating water gas from the hydrogen-oxygen mixed gas; A safety controllable and fire-off unit, the safety controllable and fire-off unit is connected to the next level of the water-gas separation unit, the safety controllable and fire-off unit comprises a fire-off module and a fire-blocking module, the fire-off module and the fire-blocking module are both connected to a control circuit board, the control circuit board is suitable for controlling the fire-off module and the fire-blocking module to be turned on or off independently, so as to disconnect the pipeline when cutting is interrupted, cutting is completed or a flashback flame appears in the pipeline; And a cutting unit, the cutting unit is connected to the next level of the safety energy control and fire-off unit, the cutting unit and the safety energy control and fire-off unit are connected through a drag chain hose, and the cutting unit is suitable for igniting a hydrogen-oxygen mixture to cut the metal to be processed.

2. The oxyhydrogen cutting system according to claim 1, characterized in that: The water-cooling circulation system includes a circulation pump, a filter, a radiator and a cooling water tank. The circulation pump, the filter and the radiator are all connected to the electrolytic cell through pipelines. The circulation pump can drive the electrolyte to circulate between the filter, the radiator and the electrolytic cell. The cooling water tank pipeline is connected to the radiator. The coolant in the cooling water tank can flow into the radiator to perform heat exchange with the electrolyte in the radiator to cool the electrolyte.

3. The oxyhydrogen cutting system according to claim 2, characterized in that: A flow regulating valve is arranged on the pipeline between the radiator and the cooling water tank, and a temperature sensor is arranged in the electrolytic cell. The flow regulating valve and the temperature sensor are both circuit-connected to the control circuit board. The temperature sensor is suitable for obtaining the temperature of the electrolyte in the electrolytic cell and converting it into an electrical signal and transmitting it to the control circuit board. The control circuit board is suitable for comparing the electrical signal with a preset value to adjust the opening and closing degree of the flow regulating valve, thereby adjusting the flow rate of the coolant.

4. The oxyhydrogen cutting system according to claim 1, characterized in that: The fire-blocking air inlet is arranged at the bottom of the fire-blocking tank body, the fire-blocking air outlet is arranged at the top of the fire-blocking tank body, the fire-blocking net is arranged inside the fire-blocking tank body along the radial direction of the fire-blocking tank body, the fire-blocking net is implemented as a multi-microporous metal net, and the micropore diameter of the fire-blocking net is 0.1 mm to 0.3 mm.

5. The oxyhydrogen cutting system according to claim 4, characterized in that: The water vapor separation unit includes a separation tank body, which is provided with a separation air inlet and a separation air outlet, the separation air inlet is arranged on the side wall of the separation tank body, the separation air inlet is arranged on the top of the separation tank body, and a return plate is arranged in the separation tank body, the return plate is an inverted frustum structure, the interior of the return plate is hollow and openings are arranged at both ends, the top opening of the return plate is connected with the separation air outlet, the height of the separation air inlet is higher than the bottom height of the return plate, and a drain outlet is also arranged at the bottom of the separation tank body.

6. The oxyhydrogen cutting system according to claim 1, characterized in that: The fire-blocking module includes two fire-blocking pipelines arranged in parallel, and the air inlet and outlet ends of each fire-blocking pipeline are respectively provided with a pipeline ball valve, and the pipeline ball valve can be operated to be turned on or off so that the hydrogen-oxygen mixture can flow in one of the two fire-blocking pipelines.

7. The oxyhydrogen cutting system according to claim 6, characterized in that: The fire arrester pipeline includes a flame arrester and a flame arrester switch arranged between the two pipeline ball valves, the flame arrester is arranged on the gas outlet side of the flame arrester switch, the flame arrester switch is connected to the control circuit board, a flashback detector is arranged in the flame arrester, the flame arrester switch and the flashback detector are both electrically connected to the control circuit board, the flashback detector is suitable for detecting whether there is a flashback flame in the flame arrester and converting it into an electrical signal to transmit to the control circuit board, and the control circuit board is suitable for controlling the flame arrester switch to disconnect the pipeline when the electrical signal reaches a preset value.

8. The oxyhydrogen cutting system according to claim 7, characterized in that: The fire-off module includes a main fire-off pipeline and a spare fire-off pipeline. The main fire-off pipeline is provided with a fire-off switch, and the fire-off switch is connected to the control circuit board. The control circuit board is suitable for controlling the closing or opening of the fire-off switch to control the on and off of the hydrogen-oxygen mixture. The air inlet side and the air outlet side of the fire-off switch are also respectively provided with inspection ball valves, and the inspection ball valves are in a normally closed state. The spare pipe fire-off pipeline is arranged in parallel with the main fire-off pipeline, and a spare ball valve is provided on the spare fire-off pipeline, and the spare ball valve is in a normally open state.

9. The oxyhydrogen cutting system according to claim 8, characterized in that: The air outlet side of the flame arrester is connected to the pipeline ball valve via a chuck hose, and the air inlet side of the spare ball valve is connected to the flame arrester module via the chuck hose.

10. The oxyhydrogen cutting system according to claim 1, characterized in that: The cutting unit includes a flame cutting machine and a cutting trolley. The cutting trolley is equipped with a cutting gun head, and the cutting gun head is connected to the flame cutting machine through the drag chain hose. The cutting trolley is also provided with a cooler, which is connected to the cutting gun head, and a coolant for cooling the cutting gun head is placed in the cooler.

Images