Automatic cover opening ignition device for blast furnace top

Abstract

The utility model discloses an automatic cover opening ignition device for a blast furnace top. According to the device, a manhole cover plate can be overturned under the action of a hydraulic cylinder; the ignition device comprises a driving assembly, a gas supply assembly and an ignition assembly, the driving assembly comprises an electric-hydraulic pusher, the ignition assembly comprises a pulse igniter, the gas supply assembly comprises a furnace end, a gas supply pipe and a combustible gas storage tank, and the furnace end is connected with the combustible gas storage tank through the gas supply pipe; the furnace end can be ignited under the action of the pulse igniter and extends into the manhole under the action of the electric-hydraulic push rod; the monitor is arranged above the manhole; the main control room is provided with a monitoring picture display and an input instruction area, and the monitor is connected with the monitoring picture display of the main control room; the input end of the PLC is connected with an input instruction area of the master control room, and the output end of the PLC is connected with the hydraulic system, the control end of the electric-hydraulic push rod and the pulse igniter. Manual operation can be reduced, and the manhole can be automatically opened and ignited.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace smelting technology, specifically to an automatic blast furnace top opening and ignition device. Background Technology

[0002] Before carrying out maintenance work on the top area of ​​the blast furnace during normal production, the blast furnace must be shut down. After the shutdown, the manhole must be opened to ignite the gas generated during the shutdown, so as to avoid personal injury to maintenance personnel due to excessive gas concentration in the top area.

[0003] The traditional ignition method involves manually opening the manhole, tying oil-soaked cotton yarn to a long pole, lighting the yarn, and then inserting the burning yarn into the manhole to ignite the gas inside the furnace. While this method achieves ignition, it has many drawbacks: the burning oil-soaked cotton yarn produces a large amount of dense smoke, polluting the environment; if gas leaks from the furnace while the manhole is manually opened, it can cause injury or death; even if the burning cotton yarn is inserted into the manhole, it may go out and need to be relit, which is time-consuming and laborious; when igniting with a long pole, the operator often stands in front of the manhole, and in special circumstances, an explosion can easily occur, potentially burning the workers. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and propose an automatic blast furnace top opening and ignition device that can reduce manual operation, automatically open the manhole and ignite, avoid harm to workers, reduce environmental pollution, and improve work efficiency.

[0005] To achieve the above objectives, the present invention proposes the following technical solution:

[0006] An automatic blast furnace top opening and ignition device includes a manhole opening device, an ignition device, a monitor, a PLC controller, and a main control room. The blast furnace top is provided with a manhole, and a manhole cover is provided on the manhole. One side of the manhole cover is hinged to the outer wall of the manhole, and the manhole cover and the manhole are detachably and securely connected.

[0007] The manhole opening device includes a hydraulic cylinder, which allows the manhole cover to be flipped under the action of the hydraulic cylinder, which is powered by hydraulic oil supplied by a hydraulic system. The ignition device includes a drive assembly, a gas supply assembly, and an ignition assembly. The drive assembly includes an electro-hydraulic actuator, the ignition assembly includes a pulse igniter, and the gas supply assembly includes a burner head, a gas supply pipe, and a combustible gas storage tank. The burner head is connected to the combustible gas storage tank through the gas supply pipe, and the burner head can be ignited under the action of the pulse igniter and extended into the manhole under the action of the electro-hydraulic actuator.

[0008] The monitor is located above the manhole and is used to monitor the combustion of the open flame at the furnace head. The main control room is equipped with a monitoring screen display and an input command area. The monitor is connected to the monitoring screen display in the main control room, and the main control room updates the monitoring screen of the monitor in real time. The input terminal of the PLC controller is connected to the input command area of ​​the main control room, and the output terminal of the PLC controller is connected to the control terminal of the hydraulic system, the electro-hydraulic actuator, and the pulse igniter.

[0009] The aforementioned monitor, main control room, PLC controller, and the connection methods between the PLC controller and the input command area of ​​the main control room, hydraulic system, and pulse igniter are all existing technologies. Specifically, the connection between the PLC controller and the control terminal of the electro-hydraulic actuator via an intermediate relay is also existing technology.

[0010] Preferably, the manhole opening device further includes a support frame, a shut-off valve, and an oil pipe. The hydraulic cylinder is mounted on the manhole cover plate of the blast furnace via the support frame. The cylinder body of the hydraulic cylinder is hinged to the support frame. The two oil ports of the hydraulic cylinder are connected to the oil pipe with the shut-off valve. The oil pipe is connected to the hydraulic system. The cylinder rod of the hydraulic cylinder is hinged to the manhole cover plate. The manhole cover plate can be flipped under the action of the hydraulic cylinder.

[0011] Preferably, the drive assembly further includes a base and a fixed bracket. The base is fixed next to the manhole on the blast furnace, and the fixed bracket is fixed on the base. The electro-hydraulic actuator is hinged to the fixed bracket. The gas supply assembly further includes a bracket. The bottom of the bracket is hinged to the base. The furnace head is mounted on the bracket, and the bracket is hinged to the head of the electro-hydraulic actuator. The pulse igniter is mounted on the base and can generate an electric spark to ignite the combustible gas.

[0012] Preferably, the output terminal of the PLC controller is connected to the shut-off valve and the valve of the combustible gas storage tank for remote control of the opening and closing of the shut-off valve and the valve of the combustible gas storage tank.

[0013] Preferably, the input command area of ​​the main control room includes a one-button ignition button, a re-ignition button, and a manhole closing button. The one-button ignition button represents the command for one-button ignition. Pressing the one-button ignition button inputs an ignition command to the PLC controller, which then sends commands to the control terminals of the hydraulic system, pulse igniter, and electro-hydraulic actuator to activate the hydraulic cylinder, flip the manhole cover, and then activate the pulse igniter to generate a high-frequency electric spark, resulting in a stable open flame at the furnace head. The electro-hydraulic actuator then activates, causing the support to pull the furnace head into the manhole, completing the furnace ignition. The re-ignition button represents the command for the furnace head to return to its original position and re-ignite. Pressing the re-ignition button inputs a re-ignition command to the PLC controller. The PLC controller sends commands to the control terminals of the pulse igniter and the electro-hydraulic actuator. The electro-hydraulic actuator is activated, causing the support to move the furnace head back to the pulse igniter. Then, the pulse igniter is activated, generating a high-frequency electric spark, which re-establishes a stable open flame at the furnace head. The electro-hydraulic actuator is then activated, causing the support to move the furnace head into the manhole, completing the ignition inside the furnace. The manhole close button represents the command to close the manhole. Pressing the manhole close button inputs the command to close the manhole to the PLC controller. The PLC controller then sends commands to the control terminal of the electro-hydraulic actuator and the hydraulic system, activating the electro-hydraulic actuator, causing the support to move the furnace head out of the furnace. Then, the hydraulic cylinder is activated, flipping the manhole cover to close the manhole.

[0014] Preferably, the manhole cover and the manhole are detachably fastened together by a fastening nut and a safety pin.

[0015] The connection method between the manhole cover and the manhole mentioned above is existing technology.

[0016] Preferably, the gas supply assembly further includes a baffle, which is an umbrella-shaped structure and is located 15cm in front of the burner head. The baffle extends outward toward the burner head and can effectively block the airflow when the gas inside the furnace is violently combusted and bursts out, reducing the probability of the open flame of the burner head going out.

[0017] Preferably, multiple gas supply pipes are provided, with the head of the gas supply pipe located inside the burner head, for supplying combustible gas to the burner head, thereby further increasing the stability of open flame combustion in the burner head.

[0018] Preferably, the tail end of the gas supply pipe is connected to a combustible gas storage tank via a rubber gas hose.

[0019] Preferably, the tail end of the gas supply pipe is connected to a mixed rubber gas pipe for combustible gas and combustion-supporting gas, and the mixed rubber gas pipe is connected to a combustible gas storage tank and a combustion-supporting gas storage tank, further increasing the stability of open flame combustion at the burner head.

[0020] Specifically, when ignition is required inside the manhole, the worker should first loosen the fastening nut, open the safety pin, then open the shut-off valve, and finally open the valve of the combustible gas storage tank. After that, the worker should leave the site.

[0021] The staff in the main control room press the one-button ignition button. After a 3-second delay, the hydraulic cylinder starts and opens the manhole cover. After the manhole cover is in place, after a 2-second delay, the pulse igniter is activated, generating a high-frequency electric spark that produces a stable open flame at the furnace head. After a 3-second delay after the pulse igniter is activated, the electro-hydraulic push rod is activated, causing the bracket to pull the furnace head into the manhole, completing the furnace ignition.

[0022] If the monitoring screen in the main control room shows that the open flame of the furnace head is extinguished, press the re-ignition button. The electro-hydraulic actuator will start, causing the bracket to move the furnace head back to the pulse igniter. Then the pulse igniter will turn on, generating a high-frequency electric spark, which will cause a stable open flame to be generated at the furnace head again. Then the electro-hydraulic actuator will start, causing the bracket to move the furnace head back into the manhole, completing the furnace ignition.

[0023] After the gas in the furnace has burned completely, press the close manhole button. The electro-hydraulic actuator will start, causing the support to pull the burner head out of the furnace. After a 2-second delay, the hydraulic cylinder will start, flip the manhole cover, and close the manhole. Then, the staff will arrive at the site to close the shut-off valve, tighten the safety pin and tighten the fastening nut, and close the valve of the combustible gas storage tank, thus completing one furnace ignition.

[0024] The beneficial effects of this utility model are as follows:

[0025] This invention incorporates a manhole opening device that allows the manhole cover to flip under the action of a hydraulic cylinder, reducing manual operation, preventing personnel from being exposed to hazardous areas, and lowering the risk of carbon monoxide poisoning. Simultaneously, a shut-off valve is installed in the hydraulic cylinder's oil circuit to close the valve when workers manually tighten the fastening nut or operate the safety pin, preventing injury to workers due to operational errors.

[0026] This invention uses a pulse igniter to ignite the burner head, and an electro-hydraulic actuator to drive the burner head into the manhole. The burner head can continuously produce an open flame, stabilizing the ignition effect of the gas in the manhole. The entire process is automated, reducing manual operation, and the open flame is produced by ignition by combustible gas, avoiding environmental pollution.

[0027] This invention uses a monitor to monitor the combustion of the open flame at the furnace head in real time. The input command area of ​​the main control room is connected to the input terminal of the PLC controller, and the output terminal of the PLC controller is connected to the control terminal of the hydraulic system, the electro-hydraulic actuator, and the pulse igniter. Based on the monitoring situation, the staff can remotely open the manhole and perform ignition operations. The system is highly automated, reduces harm to the staff, and improves work efficiency.

[0028] By adopting the above solution, this utility model can reduce manual operation, automatically open the manhole and ignite the fire, avoid harm to workers, reduce environmental pollution, and improve work efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Fig. 1 This is a schematic diagram of the overall structure of this utility model.

[0031] Fig. 2 This is a schematic diagram of the manhole opening device of this utility model.

[0032] Fig. 3 This is a structural schematic diagram of the ignition device of this utility model.

[0033] In the diagram, 1-Manhole cover; 101-Fasting nut; 102-Safety pin; 2-Manhole opening device; 201-Support frame; 202-Hydraulic cylinder; 203-Stop valve; 204-Oil pipe; 3-Ignition device; 301-Baffle; 302-Furnace head; 303-Gas supply pipe; 304-Pulse igniter; 305-Bracket; 306-Electro-hydraulic actuator; 307-Fixed bracket; 308-Base; 4-Monitor; 5-PLC controller; 6-Main control room; 61-Monitoring screen display; 62-Input command area. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] First embodiment:

[0039] like Figs. 1-3 As shown, an automatic blast furnace top opening and ignition device includes a manhole opening device 2, an ignition device 3, a monitor 4, a PLC controller 5, and a main control room 6. The blast furnace top is provided with a manhole, and a manhole cover 1 is provided on the manhole. One side of the manhole cover 1 is hinged to the outer wall of the manhole, and the manhole cover 1 and the manhole are detachably and securely connected.

[0040] The manhole opening device 2 includes a hydraulic cylinder 202, and the manhole cover 1 can be flipped under the action of the hydraulic cylinder 202. The hydraulic cylinder 202 is powered by hydraulic oil supplied by a hydraulic system. The ignition device 3 includes a drive assembly, a gas supply assembly, and an ignition assembly. The drive assembly includes an electro-hydraulic actuator 306, the ignition assembly includes a pulse igniter 304, and the gas supply assembly includes a burner head 302, a gas supply pipe 303, and a combustible gas storage tank. The burner head 302 is connected to the combustible gas storage tank through the gas supply pipe 303. The burner head 302 can be ignited under the action of the pulse igniter 304 and extended into the manhole under the action of the electro-hydraulic actuator 306.

[0041] The monitor 4 is located above the manhole and is used to monitor the combustion of the open flame at the burner head. The main control room 6 is equipped with a monitoring screen display 61 and an input command area 62. The monitor 4 is connected to the monitoring screen display 61 in the main control room 6, and the main control room 6 updates the monitoring screen of the monitor 4 in real time. The input terminal of the PLC controller 5 is connected to the input command area 62 in the main control room 6, and the output terminal of the PLC controller 5 is connected to the control mechanism of the hydraulic system, the electro-hydraulic actuator 306, and the pulse igniter 304.

[0042] like Fig. 2 As shown, the manhole opening device 2 also includes a support frame 201, a shut-off valve 203, and an oil pipe 204. The hydraulic cylinder 202 is mounted next to the manhole cover plate 1 on the blast furnace via the support frame 201. The cylinder body of the hydraulic cylinder 202 is hinged to the support frame 201. The two oil ports of the hydraulic cylinder 202 are connected to the oil pipe 204 with the shut-off valve 203. The oil pipe 204 is connected to the hydraulic system. The cylinder rod of the hydraulic cylinder 202 is hinged to the manhole cover plate 1. The manhole cover plate 1 can be flipped under the action of the hydraulic cylinder 202.

[0043] like Fig. 3As shown, the drive assembly further includes a base 308 and a fixed bracket 307. The base 308 is fixed next to the manhole on the blast furnace, and the fixed bracket 307 is fixed on the base 308. The electro-hydraulic actuator 306 is hinged to the fixed bracket 307. The gas supply assembly further includes a bracket 305. The bottom of the bracket 305 is hinged to the base 308. The furnace head 302 is mounted on the bracket 305, and the bracket 305 is hinged to the head of the electro-hydraulic actuator 306. The pulse igniter 304 is mounted on the base 308 and can generate an electric spark to ignite the combustible gas.

[0044] The input command area 62 of the main control room 6 includes a one-button ignition button, a re-ignition button, and a manhole closing button. The one-button ignition button represents the command for one-button ignition. Pressing the one-button ignition button inputs an ignition command to the PLC controller 5. The PLC controller 5 then sends commands to the control mechanisms of the hydraulic system, pulse igniter 304, and electro-hydraulic actuator 306, activating the hydraulic cylinder 202, flipping the manhole cover 1, and then activating the pulse igniter 304 to generate a high-frequency electric spark, resulting in a stable open flame at the burner head 302. The electro-hydraulic actuator 306 then activates, causing the bracket 305 to drive the burner head 302 into the manhole, completing the ignition inside the furnace. The re-ignition button represents the command for the burner head 302 to return to its original position and re-ignite. Pressing the re-ignition button inputs a return-to-ignition command to the PLC controller 5, which then sends commands to the control mechanisms of the hydraulic system, pulse igniter 304, and electro-hydraulic actuator 306. The control mechanism of the igniter 304 and the electro-hydraulic actuator 306 sends a command, and the electro-hydraulic actuator 306 is activated, causing the bracket 305 to drive the furnace head 302 back to the pulse igniter 304. Then, the pulse igniter 304 is activated, generating a high-frequency electric spark, which causes a stable open flame to be generated at the furnace head 302 again. Then, the electro-hydraulic actuator 306 is activated, causing the bracket 305 to drive the furnace head 302 into the manhole, completing the ignition inside the furnace. The manhole closing key represents the command to close the manhole. Pressing the manhole closing key inputs the command to close the manhole to the PLC controller 5. The PLC controller 5 then sends a command to the control mechanism of the electro-hydraulic actuator 306 and the hydraulic system, activating the electro-hydraulic actuator 306, causing the bracket 305 to drive the furnace head 302 out of the furnace. Then, the hydraulic cylinder 202 is activated, flipping the manhole cover 1 to close the manhole.

[0045] The manhole cover 1 is detachably and securely connected to the manhole by a fastening nut 101 and a safety pin 102.

[0046] The gas supply assembly also includes a baffle 301, which has an umbrella-shaped structure. The baffle 301 is located 15cm in front of the burner head and extends outward toward the burner head. It can effectively block the airflow when the gas inside the furnace is violently combusted and bursts out, reducing the probability of the open flame of the burner head 302 going out.

[0047] Specifically, when ignition is required inside the manhole, the worker first unscrews the fastening nut 101, opens the safety pin 102, then opens the shut-off valve 203, and opens the valve of the combustible gas storage tank. After that, the worker leaves the site.

[0048] The staff in the main control room press the one-button ignition button. After a 3-second delay, the hydraulic cylinder 202 starts and opens the manhole cover 1. After the manhole cover 1 is in place, after a 2-second delay, the pulse igniter 304 starts and generates a high-frequency electric spark, which causes a stable open flame at the burner head 302. After a 3-second delay after the pulse igniter 304 starts, the electro-hydraulic push rod 306 starts, causing the bracket 305 to drive the burner head 302 into the manhole, completing the ignition inside the furnace.

[0049] If the monitoring screen in the main control room 6 shows that the open flame of the burner head 302 is extinguished, press the re-ignition button, the electro-hydraulic actuator 306 is activated, causing the bracket 305 to move the burner head 302 back to the pulse igniter 304. Then the pulse igniter 304 is turned on, generating a high-frequency electric spark, which causes a stable open flame to be generated again at the burner head 302. Then the electro-hydraulic actuator 306 is activated, causing the bracket 305 to move the burner head 302 back into the manhole, completing the ignition inside the furnace.

[0050] After the gas in the furnace has burned completely, press the close manhole button. The electro-hydraulic actuator 306 will start, causing the support 305 to pull the burner head 302 out of the furnace. After a 2-second delay, the hydraulic cylinder 202 will start, flipping the manhole cover 1 to close the manhole. Then, the staff will arrive at the site to close the shut-off valve 203, tighten the safety pin 102 and tighten the fastening nut 101, and close the valve of the combustible gas storage tank, thus completing one furnace ignition.

[0051] Second embodiment:

[0052] like Figs. 1-3 As shown, an automatic blast furnace top opening and ignition device includes a manhole opening device 2, an ignition device 3, a monitor 4, a PLC controller 5, and a main control room 6. The blast furnace top is provided with a manhole, and a manhole cover 1 is provided on the manhole. One side of the manhole cover 1 is hinged to the outer wall of the manhole, and the manhole cover 1 and the manhole are detachably and securely connected.

[0053] The manhole opening device 2 includes a hydraulic cylinder 202, and the manhole cover 1 can be flipped under the action of the hydraulic cylinder 202. The hydraulic cylinder 202 is powered by hydraulic oil supplied by a hydraulic system. The ignition device 3 includes a drive assembly, a gas supply assembly, and an ignition assembly. The drive assembly includes an electro-hydraulic actuator 306, the ignition assembly includes a pulse igniter 304, and the gas supply assembly includes a burner head 302, a gas supply pipe 303, and a combustible gas storage tank. The burner head 302 is connected to the combustible gas storage tank through the gas supply pipe 303. The burner head 302 can be ignited under the action of the pulse igniter 304 and extended into the manhole under the action of the electro-hydraulic actuator 306.

[0054] The monitor 4 is located above the manhole and is used to monitor the combustion of the open flame at the burner head. The main control room 6 is equipped with a monitoring screen display 61 and an input command area 62. The monitor 4 is connected to the monitoring screen display 61 in the main control room 6, and the main control room 6 updates the monitoring screen of the monitor 4 in real time. The input terminal of the PLC controller 5 is connected to the input command area 62 in the main control room 6, and the output terminal of the PLC controller 5 is connected to the control mechanism of the hydraulic system, the electro-hydraulic actuator 306, and the pulse igniter 304.

[0055] like Fig. 2 As shown, the manhole opening device 2 also includes a support frame 201, a shut-off valve 203, and an oil pipe 204. The hydraulic cylinder 202 is mounted next to the manhole cover plate 1 on the blast furnace via the support frame 201. The cylinder body of the hydraulic cylinder 202 is hinged to the support frame 201. The two oil ports of the hydraulic cylinder 202 are connected to the oil pipe 204 with the shut-off valve 203. The oil pipe 204 is connected to the hydraulic system. The cylinder rod of the hydraulic cylinder 202 is hinged to the manhole cover plate 1. The manhole cover plate 1 can be flipped under the action of the hydraulic cylinder 202.

[0056] like Fig. 3 As shown, the drive assembly further includes a base 308 and a fixed bracket 307. The base 308 is fixed next to the manhole on the blast furnace, and the fixed bracket 307 is fixed on the base 308. The electro-hydraulic actuator 306 is hinged to the fixed bracket 307. The gas supply assembly further includes a bracket 305. The bottom of the bracket 305 is hinged to the base 308. The furnace head 302 is mounted on the bracket 305, and the bracket 305 is hinged to the head of the electro-hydraulic actuator 306. The pulse igniter 304 is mounted on the base 308 and can generate an electric spark to ignite the combustible gas.

[0057] The output terminal of the PLC controller 5 is connected to the shut-off valve 203 and the valve of the combustible gas storage tank, and is used to remotely control the opening and closing of the shut-off valve 203 and the valve of the combustible gas storage tank.

[0058] The input command area 62 of the main control room 6 includes a one-key ignition key, a re-ignition key, and a manhole closing key. The one-key ignition key represents the command for one-key ignition. Pressing the one-key ignition key inputs an ignition command to the PLC controller 5. The PLC controller 5 then sends opening commands to the shut-off valve 203 and the valve of the combustible gas storage tank, opening the shut-off valve 203 and the valve of the combustible gas storage tank. It then sends commands to the control mechanisms of the hydraulic system, pulse igniter 304, and electro-hydraulic actuator 306, activating the hydraulic cylinder 202, flipping the manhole cover 1, and then activating the pulse igniter 304 to generate a high-frequency electric spark, resulting in a stable open flame at the burner head 302. Then, it activates the electro-hydraulic actuator 306, causing the bracket 305 to drive the burner head 302 into the manhole, completing the ignition inside the furnace. The re-ignition key represents the command for the burner head 302 to return to its original position and re-ignite. Pressing the re-ignition key inputs a return-to-ignition command to the PLC controller 5. The LC controller 5 sends commands to the control mechanisms of the pulse igniter 304 and the electro-hydraulic actuator 306. The electro-hydraulic actuator 306 is activated, causing the bracket 305 to move the burner head 302 back to the pulse igniter 304. Then, the pulse igniter 304 is activated, generating a high-frequency electric spark, which causes a stable open flame to re-emerge at the burner head 302. Then, the electro-hydraulic actuator 306 is activated, causing the bracket 305 to move the burner head 302 into the manhole, completing the ignition inside the furnace. The manhole closing key represents the command to close the manhole. Pressing the manhole closing key inputs the command to close the manhole to the PLC controller 5. The PLC controller 5 then sends commands to the control mechanism of the electro-hydraulic actuator 306 and the hydraulic system, activating the electro-hydraulic actuator 306, causing the bracket 305 to move the burner head 302 out of the furnace. Then, the hydraulic cylinder 202 is activated, flipping the manhole cover 1 to close the manhole. Finally, closing commands are sent to the shut-off valve 203 and the valve of the combustible gas storage tank.

[0059] The manhole cover 1 is detachably and securely connected to the manhole by a fastening nut 101 and a safety pin 102.

[0060] The gas supply assembly also includes a baffle 301, which has an umbrella-shaped structure. The baffle 301 is located 15cm in front of the burner head and extends outward toward the burner head. It can effectively block the airflow when the gas inside the furnace is violently combusted and bursts out, reducing the probability of the open flame of the burner head 302 going out.

[0061] Specifically, when ignition is required inside the manhole, the staff should first unscrew the fastening nut 101, open the safety pin 102, and then leave the site.

[0062] The staff in the main control room press the one-button ignition button, open the shut-off valve 203, and open the valve of the combustible gas storage tank. After a 3-second delay, the hydraulic cylinder 202 starts and opens the manhole cover 1. After the manhole cover 1 is opened to the correct position, after a 2-second delay, the pulse igniter 304 starts and generates a high-frequency electric spark, which causes a stable open flame at the burner head 302. After a 3-second delay after the pulse igniter 304 starts, the electro-hydraulic push rod 306 starts, causing the bracket 305 to drive the burner head 302 into the manhole, completing the ignition inside the furnace.

[0063] If the monitoring screen in the main control room 6 shows that the open flame of the burner head 302 is extinguished, press the re-ignition button, the electro-hydraulic actuator 306 is activated, causing the bracket 305 to move the burner head 302 back to the pulse igniter 304. Then the pulse igniter 304 is turned on, generating a high-frequency electric spark, which causes a stable open flame to be generated again at the burner head 302. Then the electro-hydraulic actuator 306 is activated, causing the bracket 305 to move the burner head 302 back into the manhole, completing the ignition inside the furnace.

[0064] After the gas in the furnace has burned completely, press the close manhole button. The electro-hydraulic actuator 306 is activated, causing the support 305 to pull the burner head 302 out of the furnace. After a 2-second delay, the hydraulic cylinder 202 is activated, flipping the manhole cover 1 to close the manhole. Then, a closing command is sent to the shut-off valve 203 and the valve of the combustible gas storage tank. The shut-off valve closes, the valve of the combustible gas storage tank closes, and the gas supply stops. Then, the staff arrives at the scene to tighten the safety pin 102 and tighten the fastening nut 101, thus completing one furnace ignition.

[0065] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic blast furnace top opening and ignition device, wherein a manhole is provided on the blast furnace top, a manhole cover is provided on the manhole, one side of the manhole cover is hinged to the outer wall of the manhole, and the manhole cover and the manhole are detachably and securely connected, characterized in that: The system includes a manhole opening device, an ignition device, a monitor, a PLC controller, and a main control room. The manhole opening device includes a hydraulic cylinder, which allows the manhole cover to flip under the action of the hydraulic cylinder. The ignition device includes a drive assembly, a gas supply assembly, and an ignition assembly. The drive assembly includes an electro-hydraulic actuator, and the ignition assembly includes a pulse igniter. The gas supply assembly includes a burner head, a gas supply pipe, and a combustible gas storage tank. The burner head is connected to the combustible gas storage tank via the gas supply pipe and can be ignited by the pulse igniter and extended into the manhole under the action of the electro-hydraulic actuator. The monitor is located above the manhole. The main control room has a monitoring screen display and an input command area. The monitor is connected to the monitoring screen display in the main control room. The input terminal of the PLC controller is connected to the input command area in the main control room, and the output terminal of the PLC controller is connected to the hydraulic system, the control terminal of the electro-hydraulic actuator, and the pulse igniter.

2. The automatic blast furnace top opening and ignition device according to claim 1, characterized in that: The manhole opening device also includes a support frame, a shut-off valve, and an oil pipe. The hydraulic cylinder is mounted on the manhole cover plate of the blast furnace via the support frame. The cylinder body of the hydraulic cylinder is hinged to the support frame. The two oil ports of the hydraulic cylinder are connected to the oil pipe with the shut-off valve. The oil pipe is connected to the hydraulic system. The cylinder rod of the hydraulic cylinder is hinged to the manhole cover plate.

3. The automatic blast furnace top opening and ignition device according to claim 1, characterized in that: The drive assembly also includes a base and a fixed bracket. The base is fixed next to the manhole on the blast furnace, and the fixed bracket is fixed on the base. The electro-hydraulic actuator is hinged to the fixed bracket. The gas supply assembly also includes a bracket. The bottom of the bracket is hinged to the base. The furnace head is located on the bracket, and the bracket is hinged to the head of the electro-hydraulic actuator. The pulse igniter is located on the base.

4. The automatic blast furnace top opening and ignition device according to claim 1, characterized in that: The manhole cover and the manhole are detachably fastened together by fastening nuts and safety pins.

5. The automatic blast furnace top opening and ignition device according to claim 1, characterized in that: The gas supply assembly also includes a baffle, which has an umbrella-shaped structure and is located 15cm in front of the burner head, with the baffle extending outward toward the burner head.

6. The automatic blast furnace top opening and ignition device according to claim 1, characterized in that: The gas supply pipes are provided in multiple locations, with the heads of the gas supply pipes located inside the furnace head.

7. The automatic blast furnace top opening and ignition device according to claim 1, characterized in that: The output of the PLC controller is connected to the valve of the combustible gas storage tank.

8. The automatic blast furnace top opening and ignition device according to claim 2, characterized in that: The shut-off valve is connected to the output terminal of the PLC controller.

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