A redundant and intelligent switching device and method for a blast furnace top pressure equalization bleeding system

Abstract

The application discloses a redundant and intelligent switching device for a blast furnace top pressure equalizing and releasing system, comprising: a corresponding standby coal gas recovery valve is arranged for the coal gas recovery valve, and a corresponding previous equalizing standby valve is arranged for the previous equalizing valve; a standby valve hydraulic valve table and a main hydraulic standby valve table are arranged for the hydraulic drive system; the electric control switching system is used for detecting the running state of the main device, and when an abnormal signal is detected, automatic or manual switching between the main device and the corresponding standby device at a fault position is realized. The application further discloses a redundant and intelligent switching method for a blast furnace top pressure equalizing and releasing system. The above-mentioned device and method solve the technical problems of single-point failure and low processing efficiency of the blast furnace top material tank in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of blast furnace smelting technology, specifically relating to a redundancy and intelligent switching device and method for a blast furnace top pressure equalization and venting system. Background Technology

[0002] The blast furnace top equipment is the core system that ensures the stable and smooth operation of the blast furnace. It mainly consists of key equipment such as upper sealing valve, lower sealing valve, material flow regulating valve, pressure equalization valve, gas recovery system, flap valve, and gas venting valve. All equipment is centrally and uniformly controlled by a hydraulic valve platform, and its operational reliability directly determines the continuity, stability, and economic benefits of blast furnace production.

[0003] The core working process of the blast furnace top charge tank has strict pressure control requirements: before the charge tank is unloaded (charged), the gas recovery valve must be opened to release the residual pressure in the charge tank to balance with the atmospheric pressure, ensuring a safe and smooth charging process; before the charge tank is discharged, the pressure equalization valve must be opened to raise the pressure in the charge tank to balance with the pressure inside the blast furnace, avoiding excessive pressure difference that could lead to backflow of gas into the furnace or uneven feeding, thereby achieving uniform distribution of material into the furnace.

[0004] Among them, equalizing valves, gas recovery valves, and other equalizing and venting valves are core components for controlling pressure changes within the blast furnace tanks. Their operational status directly affects the safety and rhythm of the tank's loading and unloading. Furthermore, all valves on the furnace top rely on hydraulic actuation; the integrity of the hydraulic control system and pipelines, as the core of power transmission, directly determines the effectiveness of valve operation. In actual industrial production, numerous malfunctions have occurred, such as jamming, incomplete closure, or inability to open or close equalizing and venting valves. These issues prevent the blast furnace tanks from completing equalizing or venting operations normally, forcing the implementation of single-tank handling measures, which in turn leads to reduced blast furnace blast, reduced production, or even temporary shutdowns. In addition, leaks, blockages, or damage to hydraulic control valves and pipelines can directly cause the corresponding valves to malfunction, disrupting the normal loading and replenishment rhythm of the furnace top tanks, resulting in production interruptions and economic losses.

[0005] Therefore, the industry urgently needs a redundant and intelligent switching device and method for the blast furnace top pressure equalization and venting system to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a redundant and intelligent switching device and method for a blast furnace top pressure equalization and venting system, which solves the technical problem that the blast furnace top material tank is prone to single-point failure and has low processing efficiency in the prior art.

[0007] This invention provides a redundant and intelligent switching device for a blast furnace top pressure equalization and venting system, comprising a core valve, a hydraulic drive system, and an electrical control switching system; the core valve includes at least an upper sealing valve, a lower sealing valve, a material flow regulating valve, a flap valve, a gas recovery valve, and an upper equalization valve, which are opened and closed by the hydraulic drive system, wherein: The gas recovery valve is equipped with a corresponding backup gas recovery valve, and the upper equalization valve is equipped with a corresponding upper equalization backup valve. The hydraulic drive system is equipped with a backup valve hydraulic valve platform for driving the backup gas recovery valve and the upper backup valve, and a main hydraulic backup valve platform for driving the upper sealing valve, the lower sealing valve, the material flow regulating valve and the flap valve. The electronic control switching system is used to detect the operating status of the main equipment and, when an abnormal signal is detected, to realize automatic or manual switching between the main equipment and the corresponding backup equipment at the faulty location. The main equipment includes at least a core valve, a main hydraulic valve platform, and a main pipeline. The backup equipment includes at least a backup gas recovery valve, an upper backup valve, a backup valve hydraulic platform, a main hydraulic backup valve platform, and a backup pipeline.

[0008] Furthermore, the electronic control switching system includes: The signal acquisition module is used to acquire the operating status signals of the main device in real time; The fault diagnosis module is used to monitor the operating status signal in real time. If an abnormal signal is detected, an operating fault signal is output. An alarm module is used to receive the operational fault signal and provide audible and visual alarms; The PLC controller is used to receive the operational fault signal and execute the switching instructions between the main equipment and the corresponding backup equipment at the fault location, as well as the maintenance and repair instructions for the main equipment at the fault location.

[0009] Furthermore, the electronic control switching system also includes: The interlocking protection module adopts a dual interlocking protection mechanism that combines electrical logic interlocking and mechanical interlocking.

[0010] Furthermore, both the standby gas recovery valve and the previous standby valve are connected to the hydraulic valve seat of the standby valve via independent pipelines.

[0011] Furthermore, both the standby hydraulic valve platform and the main hydraulic standby valve platform are supplied with oil by independent cylinders. The main hydraulic standby valve platform is connected in parallel with the original main hydraulic pipeline through a three-way connector and a ball valve, forming a dual-circuit hydraulic redundancy structure of "main circuit and standby circuit".

[0012] Another aspect of the present invention provides a redundancy and intelligent switching method for a blast furnace top pressure equalization and venting system, applied to the aforementioned equipment, comprising: Step S1: Configure the standby gas recovery valve and the previous standby valve; Step S2: Configure a standby hydraulic valve platform for driving the standby gas recovery valve and the upper standby valve, and a main hydraulic standby valve platform for driving the upper sealing valve, the lower sealing valve, the material flow regulating valve and the flap valve. Step S3: Under normal production conditions, the main equipment is in operation and the standby equipment is on standby. The operating status of the main equipment is monitored, and when an abnormal signal is detected, the main equipment and the standby equipment are automatically or manually switched.

[0013] Further, step S3 includes: Under normal production conditions, the main equipment is in operation while the backup equipment is on standby. Real-time signals of the operating status of the main equipment are collected. The operating status signals are monitored in real time. If an abnormal signal is detected, an audible and visual alarm is triggered, and the faulty part is marked. Manually or automatically switch between the main equipment and the corresponding backup equipment at the faulty location, and perform maintenance and repair on the main equipment at the faulty location.

[0014] Furthermore, step S3 also includes: When switching between the primary and backup equipment at the faulty location, dual protection is provided by electrical and mechanical interlocks.

[0015] Furthermore, when the gas recovery valve malfunctions, the gas recovery valve is fixed in the open position and switched to the standby gas recovery valve. After the switch is completed, the isolation valves at both ends of the gas recovery valve are closed to isolate, repair, or replace the gas recovery valve. When the upper equalization valve fails to close properly, fix the upper equalization valve in the open position, switch to the corresponding upper equalization standby valve, and after the switch is completed, close the isolation valves at both ends of the upper equalization valve to isolate, repair or replace the upper equalization valve.

[0016] Furthermore, when the main hydraulic valve platform and / or main pipeline fails, the system switches to the corresponding main hydraulic standby valve platform, opens the ball valve between the standby pipeline and each valve cylinder, and closes the isolation valve on the main pipeline, thereby switching the hydraulic power source so that the main hydraulic standby valve platform provides hydraulic power to the corresponding valve.

[0017] The present invention provides a redundant and intelligent switching device and method for a blast furnace top pressure equalization and venting system. By adopting an integrated design of "core valve single-point redundancy + hydraulic system dual-valve platform redundancy + intelligent electrical control switching", it can achieve rapid and seamless switching of core valves, eliminate the risk of single-point failure of hydraulic system, ensure continuous, stable and efficient production of blast furnace, reduce economic losses and improve production safety. Attached Figure Description

[0018] Figure 1 This is a partial schematic diagram of the redundant structure of a blast furnace top pressure equalization and venting system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the functional modules of a redundant and intelligent switching device for a blast furnace top pressure equalization and venting system provided in an embodiment of the present invention; Figure 3 A logic block diagram of a redundancy and intelligent switching method for a blast furnace top pressure equalization and venting system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the working principle of switching the working valve platform corresponding to each core valve, provided in an embodiment of the present invention. 101-Second equalizing valve, 102-Next equalizing valve, 103-Next equalizing bypass pipe, 104-Small cyclone dust collector, 105-Gas recovery valve, 106-Standby gas recovery valve, 107-Standby valve of the previous equalizing valve, 108-Present equalizing valve. 1-Shangmi standby valve platform; 2-Shangmi standby A-pipe ball valve (2); 3-Shangmi standby A-pipe ball valve (1); 4-Shangmi original A-pipe ball valve; 5-Shangmi oil cylinder; 6-Shangmi original B-pipe ball valve; 7-Shangmi standby B-pipe ball valve (1); 8-Shangmi standby B-pipe ball valve (2); 9-Xiami standby valve platform; 10-Xiami standby A-pipe ball valve (2); 11-Xiami standby A-pipe ball valve (1); 12-Xiami original A-pipe ball valve; 13-Xiami oil cylinder; 14-Xiami original B-pipe ball valve; 15-Xiami standby B-pipe ball valve (1); 16-Xiami standby B-pipe ball valve (2); 17-Material flow regulating valve standby valve platform; 18-Throttle standby A-pipe ball valve (2); 19-Throttle standby A-pipe ball valve (1); 20-Throttle original A-pipe ball valve; 21-Throttle oil cylinder; 22- 23-Throttle original B-pipe ball valve; 24-Throttle backup B-pipe ball valve (1); 25-Throttle backup B-pipe ball valve 2; 26-Upper equalization backup valve platform; 27-Upper equalization backup A-pipe ball valve 2; 28-Upper equalization original A-pipe ball valve; 29-Upper equalization cylinder; 30-Upper equalization original B-pipe ball valve; 31-Upper equalization original B-pipe ball valve; 32-Upper equalization backup B-pipe ball valve (1); 33-Gas recovery backup valve platform; 34-Gas recovery backup A-pipe ball valve (2); 35-Gas recovery backup A-pipe ball valve (1); 36-Gas recovery original A-pipe ball valve; 37-Gas recovery valve cylinder; 38-Gas recovery original B-pipe ball valve; 39-Gas recovery backup B-pipe ball valve (1); 40-Gas recovery backup B-pipe ball valve (2). Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0021] Example 1: Based on the existing technologies, which either only achieve overall pipeline redundancy without separate redundancy for core valves and hydraulic systems, or only optimize the performance of a single valve without addressing redundancy switching design, this application adopts an integrated design of "core valve single-point redundancy + hydraulic system dual-valve-station redundancy + intelligent electronic control switching + dual interlocking protection". This design achieves rapid and seamless switching of core valves, eliminates the risk of single-point failure in the hydraulic system, and also features automatic fault alarm and non-stop maintenance functions. It comprehensively solves the four major pain points of "redundancy comprehensiveness, switching efficiency, operational safety, and maintenance convenience" that existing technologies cannot address simultaneously.

[0022] Combination Figure 1 As shown in the embodiment of this application, a redundant and intelligent switching device for a blast furnace top pressure equalization and venting system is provided, including core valves, a hydraulic drive system, and an electrical control switching system. The core valves include at least an upper sealing valve, a lower sealing valve, a material flow regulating valve, a flap valve, a gas recovery valve 105, and an upper equalization valve 108, which are driven to open and close by the hydraulic drive system. Among them, the second equalization valve 101 is used for secondary pressure equalization to balance the pressure between the material tank and the furnace, realizing the redundancy of the pressure equalization system; the next equalization valve 102 and the upper equalization valve 108 are used for primary pressure equalization of the next material tank and the current material tank, respectively; the next equalization bypass pipe 103 serves as the passage for material tank venting; the small cyclone dust collector 104 is used to purify the recovered gas and prevent dust from entering the recovery pipeline. When the material tank vents, the dust accumulates in the dust collector, and the accumulated dust is back-blown to the material tank during pressure equalization; the gas recovery valve is used to control the venting of the material tank to the gas recovery pipeline.

[0023] In some embodiments, combined with Figure 1As shown, above the pipeline of the gas recovery valve 105 and the upper equalization valve 108, a standby gas recovery valve 106 and a standby upper equalization valve 107 of the same model are connected in series to form a "one in use, one in standby" dual-valve structure. When the main valve is working normally, the standby valve is in a normally open standby state to ensure unobstructed pipeline flow and not affect normal production processes. When the main valve fails, it can quickly switch to the standby valve for seamless operation.

[0024] In some embodiments, an independent standby valve hydraulic valve platform is added, specifically for controlling the standby gas recovery valve 106, gas recovery valve 105, and the upper standby valve 107. The hydraulic oil pipe of the standby valve hydraulic valve platform is directly connected to the cylinder of each standby valve, achieving physical isolation and independent control from the main hydraulic valve platform that controls the main valve, avoiding the impact of a failure of the main hydraulic valve platform on the normal operation of the standby valve, and ensuring a reliable hydraulic power supply for the standby valve.

[0025] In some embodiments, a main hydraulic backup valve platform is added to provide backup hydraulic power for other core valves such as the upper sealing valve, lower sealing valve, material flow regulating valve, and flap valve. The backup oil pipe of the main hydraulic backup valve platform is led to the corresponding valve and connected in parallel with the original main hydraulic pipeline through a three-way connector and a ball valve to form a dual-circuit hydraulic redundancy structure of "main circuit + backup circuit". During normal production, the ball valve is closed and the backup pipeline is in standby mode. When the main hydraulic valve platform and / or the main pipeline fails, it can be quickly switched to the backup pipeline, and the main hydraulic backup valve platform provides hydraulic power.

[0026] In some embodiments, combined with Figure 2 As shown, the electronic control switching system includes: The signal acquisition module is used to acquire the operating status signals of the main device in real time; The fault diagnosis module is used to monitor the operating status signal in real time. If an abnormal signal is detected, an operating fault signal is output. An alarm module is used to receive the operational fault signal and provide audible and visual alarms; The PLC controller is used to receive the operation fault signal and execute the switching command between the main equipment and the corresponding backup equipment of the faulty part, as well as the maintenance and repair command of the main equipment of the faulty part. The main equipment includes at least a core valve, a main hydraulic valve platform and a main pipeline. The backup equipment includes at least a backup gas recovery valve 106, a gas recovery valve 105, an upper backup valve 107, a backup valve hydraulic platform, a main hydraulic backup valve platform and a backup pipeline.

[0027] The interlocking protection module employs a dual interlocking protection mechanism combining electrical logic interlocking and mechanical interlocking. The electrical interlocking relies on the program logic of the electronic control switching system to electrically interlock the switching actions and operating states of the primary and backup equipment, restricting erroneous operation commands and preventing simultaneous operation and disordered action sequences of the primary and backup equipment. The mechanical interlocking sets mechanical limit switches at the valve locations, physically restricting valve movement and preventing simultaneous connection of the primary and backup oil circuits.

[0028] Combination Figure 3 As shown in the embodiments of this application, a method for redundancy and intelligent switching of a blast furnace top pressure equalization and venting system is also provided, applied to the aforementioned equipment, including: Step S1: Configure the standby gas recovery valve and the previous standby valve; Step S2: Configure a standby hydraulic valve platform for driving the standby gas recovery valve and the upper standby valve, and a main hydraulic standby valve platform for driving the upper sealing valve, the lower sealing valve, the material flow regulating valve and the flap valve. Step S3: Under normal production conditions, the system adopts a mode of primary equipment operation and standby equipment standby, detects the operating status of the primary equipment, and automatically or manually switches between the primary equipment and standby equipment when an abnormal signal is detected.

[0029] Step S3 includes: S31: Under normal production conditions, the main equipment is in operation while the backup equipment is on standby. S32: Collect real-time operating status signals of the main equipment; S33: Monitor the real-time operating status signal; if an abnormal signal is detected, issue an audible and visual alarm and mark the faulty part. S34: Manually or automatically switch between the main equipment and the corresponding backup equipment at the faulty location, and perform maintenance and repair on the main equipment at the faulty location.

[0030] The specific process of step S31 is as follows: Step S311: Pressure Equalization Process: The operator issues a pressure equalization command through the PLC controller, automatically opening the upper and lower pressure equalization valves; the upper pressure equalization standby valve is in a normally open standby state and does not participate in normal pressure equalization operations; the second pressure equalization valve is in a normally closed state and serves as a backup for secondary pressure equalization; the high-pressure gas in the blast furnace slowly enters the material tank through the upper and lower pressure equalization valves and the small cyclone dust collector, performing a first pressure equalization on the material tank until the pressure in the material tank is completely balanced with the pressure in the furnace, and the pressure equalization process is completed.

[0031] Step S312: Venting process: After the material tank is filled and emptied, the PLC controller automatically closes the material flow regulating valve and the lower sealing valve; then the gas recovery valve is opened, the standby gas recovery valve is in the normally open standby state, and the next equalization valve is closed; the residual high-pressure gas in the material tank is transported to the gas recovery pipeline through the next equalization bypass pipe, the small cyclone dust collector, and the gas recovery valve to complete the gas recovery; after the pressure in the material tank drops to atmospheric pressure, the gas recovery valve is closed, the upper sealing valve is opened, and the next round of material loading process is started to realize the cycle operation.

[0032] Step S313: Hydraulic system operation: The main hydraulic valve console is working normally, providing hydraulic power to all core valves; the standby valve hydraulic valve console and the main hydraulic standby valve console are in standby mode, and the ball valve on the standby oil pipe is closed to ensure that the standby pipeline is physically isolated from the main pipeline and does not affect the operation of the main system.

[0033] Specifically, in step S33, when the system detects a fault in the core valve, main hydraulic valve platform, or main pipeline, the switching process can be initiated automatically or manually to achieve seamless transition in the fault state. The specific switching method is as follows: When the detection module detects a fault in the main gas recovery valve, such as jamming, improper closure, or inability to open or close, it immediately issues an audible and visual alarm. The PLC controller interface will then clearly indicate the fault location, fault type, and switching operation steps, assisting operators in quickly and accurately handling the fault and shortening the troubleshooting time. Operators can select automatic or manual mode according to the PLC controller prompts. First, fix the main gas recovery valve in the open position. After confirming that the standby gas recovery valve is in normal working condition, the system will automatically switch to the standby gas recovery valve, and the material tank venting process will proceed normally without shutdown. The fault switching time can be controlled within minutes, ensuring continuous production. After the switch is completed, close the isolation valves at both ends of the gas recovery valve to isolate, repair, or replace the gas recovery valve.

[0034] When the primary equalization valve malfunctions and fails to close properly, the operator immediately secures the faulty valve in the open position and opens the corresponding backup valve to continue the equalization operation. This switching process does not disrupt the equalization rhythm of the material tank. If the primary equalization valve fails to open, the secondary equalization valve is immediately activated to achieve secondary equalization between the material tank and the furnace, ensuring the equalization process is completed normally and preventing disruption to the material distribution operation. After the switch is complete, the isolation valves at both ends of the primary equalization valve are closed, and the primary equalization valve is isolated, inspected, or replaced.

[0035] When the next equalization valve fails to open, the equalization and venting pathways of the equipment are automatically switched. Both equalization and venting operations are completed through the next equalization bypass pipe to ensure normal pressure control of the material tank. At the same time, operators can schedule time to inspect the next equalization valve while the equipment is running normally, and in conjunction with the maintenance downtime, clean the dust accumulated in the small cyclone dust collector to avoid dust blockage affecting system operation.

[0036] When the main hydraulic valve platform malfunctions (such as control valve jamming or leakage), and / or the main pipeline experiences blockage or damage, the operator immediately issues a switching command through the PLC controller to switch to the corresponding main hydraulic backup valve platform. Subsequently, the ball valves between the backup oil pipe and each valve cylinder are opened, and the valves on the main oil pipe are closed, realizing the switching of the hydraulic power source. The main hydraulic backup valve platform provides hydraulic power to the corresponding core valves, ensuring the normal operation of core equipment such as the upper sealing valve and lower sealing valve, without affecting the production process.

[0037] Specifically, in combination Figure 4 As shown, when the main hydraulic valve platform malfunctions, taking the switching of the upper sealing valve's working valve platform as an example, under normal operating conditions, the upper sealing cylinder is controlled by the main hydraulic valve platform: the main hydraulic valve platform controls the rodless chamber oil circuit of the upper sealing cylinder through the ball valve 4 on the original upper sealing A pipe, and controls the rod chamber oil circuit of the upper sealing cylinder through the ball valve 6 on the original upper sealing B pipe, thus controlling the cylinder's extension and retraction, and the opening and closing of the upper sealing valve. When switching to the main hydraulic standby valve platform for control, strictly follow these steps: (1) Close the ball valve 4 of the upper-mist original A pipe and the ball valve 6 of the upper-mist original B pipe to cut off the oil supply line from the main hydraulic valve platform to the oil cylinder and isolate the main hydraulic valve platform system; (2) Open the ball valve (1) 3, the ball valve (2) 2, the ball valve (1) 7, and the ball valve (2) 8 of the backup A pipe in sequence to connect the main hydraulic backup valve platform oil supply circuit; (3) The pressure oil of the main hydraulic standby valve platform is connected to the rodless chamber of the upper hydraulic cylinder via the upper backup A pipe ball valve (2)2 and the upper backup A pipe ball valve (1)3; and connected to the rod chamber of the upper hydraulic cylinder via the upper backup B pipe ball valve (2)8 and the upper backup B pipe ball valve (1)7, so as to realize the full-process action control of the upper hydraulic cylinder by the main hydraulic standby valve platform.

[0038] The switching principle, operation steps, and valve opening and closing logic of the backup valve platform for the other core valves, such as the lower sealing cylinder, material flow throttling cylinder, upper equalizing cylinder, and gas recovery valve cylinder, are completely consistent with those of the upper sealing cylinder. The only difference is the corresponding pipeline, ball valve, and valve platform number. Simply follow the same operation by referring to the corresponding component number.

[0039] After the switch is completed, close the isolation valves at both ends of the main hydraulic valve platform and / or the main pipeline fault location, and isolate, repair or replace the main hydraulic valve platform and / or the main pipeline fault location.

[0040] When switching between the primary and backup equipment at the faulty location, dual protection is provided by electrical and mechanical interlocks.

[0041] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. This application adopts a "one-in-use, one-out-of-use" dual-valve structure for the gas recovery valve and the upper equalization valve, and adopts a dual-valve platform and dual-pipeline redundancy design for the hydraulic system. This completely solves the problem of production interruption caused by single equipment failure in the existing technology, reduces the failure rate of the furnace top equalization and venting system by more than 90%, greatly improves the system's operational reliability, completely eliminates single point failures, and enhances system reliability.

[0042] 2. By adopting an intelligent electronic control switching system and a clear switching method, this application reduces the fault switching time from several hours in the prior art to less than 5 minutes, achieving seamless connection under fault conditions, avoiding blast furnace shutdown or reduced airflow, ensuring continuous and stable blast furnace production, and significantly improving production efficiency and economic benefits. Practical application verification shows that after adopting this application, the unplanned downtime of the blast furnace is reduced by more than 85%, resulting in significant annual production increases.

[0043] 3. By utilizing redundantly designed backup equipment, this application enables the isolation, repair, and replacement of faulty main equipment during normal blast furnace production, reducing unplanned downtime and lowering labor costs, backup equipment costs, and downtime losses for equipment maintenance. At the same time, the periodic switching maintenance mechanism can extend the service life of equipment and further reduce the overall maintenance cost of equipment.

[0044] 4. This application effectively avoids safety accidents such as gas leakage and pressure imbalance caused by misoperation or equipment failure through a complete electrical and mechanical dual interlock control, fault diagnosis and audible and visual alarm functions, ensuring the safety of operators and production equipment; at the same time, the switching process is smooth and without pressure fluctuations, further improving the operational safety and stability of the furnace top system.

[0045] 5. This application is applicable to the pressure equalization and venting systems of various large and medium-sized blast furnaces. It does not require large-scale modification of existing furnace top equipment. The modification is simple and cost-controllable. It has strong versatility and engineering application value, and is easy to promote in the metallurgical industry.

[0046] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention. Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0047] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0048] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0049] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination. The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the electronic device according to embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form. The above descriptions are merely embodiments of this application. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this application. These should also be considered within the scope of protection of this application, and will not affect the effectiveness of the implementation of this application or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A redundant and intelligent switching device for a blast furnace top pressure equalization and venting system, comprising a core valve, a hydraulic drive system, and an electrical control switching system; the core valve includes at least an upper sealing valve, a lower sealing valve, a material flow regulating valve, a flap valve, a gas recovery valve, and an upper equalization valve, and is driven to open and close by the hydraulic drive system, characterized in that: The gas recovery valve is equipped with a corresponding backup gas recovery valve, and the upper equalization valve is equipped with a corresponding upper equalization backup valve. The hydraulic drive system is equipped with a backup valve hydraulic valve platform for driving the backup gas recovery valve and the upper backup valve, and a main hydraulic backup valve platform for driving the upper sealing valve, the lower sealing valve, the material flow regulating valve and the flap valve. The electronic control switching system is used to detect the operating status of the main equipment and, when an abnormal signal is detected, to realize automatic or manual switching between the main equipment and the corresponding backup equipment at the faulty location. The main equipment includes at least a core valve, a main hydraulic valve platform, and a main pipeline. The backup equipment includes at least a backup gas recovery valve, an upper backup valve, a backup valve hydraulic platform, a main hydraulic backup valve platform, and a backup pipeline.

2. The redundant and intelligent switching device for the blast furnace top pressure equalization and venting system as described in claim 1, characterized in that, The electronic control switching system includes: The signal acquisition module is used to acquire the operating status signals of the main device in real time; The fault diagnosis module is used to monitor the operating status signal in real time. If an abnormal signal is detected, an operating fault signal is output. An alarm module is used to receive the operational fault signal and provide audible and visual alarms; The PLC controller is used to receive the operational fault signal and execute the switching instructions between the main equipment and the corresponding backup equipment at the fault location, as well as the maintenance and repair instructions for the main equipment at the fault location.

3. The redundant and intelligent switching device for the blast furnace top pressure equalization and venting system as described in claim 1, characterized in that, The electronic control switching system also includes: The interlocking protection module adopts a dual interlocking protection mechanism that combines electrical logic interlocking and mechanical interlocking.

4. The redundancy and intelligent switching device for the blast furnace top pressure equalization and venting system as described in claim 1, characterized in that: The standby gas recovery valve and the previous standby valve are both connected to the hydraulic valve seat of the standby valve via independent pipelines.

5. The redundancy and intelligent switching device for the blast furnace top pressure equalization and venting system as described in claim 1, characterized in that: Both the standby hydraulic valve platform and the main hydraulic standby valve platform are supplied with oil by independent oil cylinders. The main hydraulic standby valve platform is connected in parallel with the original main hydraulic pipeline through a three-way connector and a ball valve to form a dual-circuit hydraulic redundancy structure.

6. A method for redundancy and intelligent switching of a blast furnace top pressure equalization and venting system, applied to the equipment described in any one of claims 1-5, characterized in that, include: Step S1: Configure the standby gas recovery valve and the previous standby valve; Step S2: Configure a standby hydraulic valve platform for driving the standby gas recovery valve and the upper standby valve, and a main hydraulic standby valve platform for driving the upper sealing valve, the lower sealing valve, the material flow regulating valve and the flap valve. Step S3: Under normal production conditions, the main equipment is in operation and the standby equipment is on standby. The operating status of the main equipment is monitored, and when an abnormal signal is detected, the main equipment and the standby equipment are automatically or manually switched.

7. The method for redundancy and intelligent switching of the blast furnace top pressure equalization and venting system as described in claim 6, characterized in that, Step S3 includes: Under normal production conditions, the main equipment is in operation while the backup equipment is on standby. Real-time signals of the operating status of the main equipment are collected. The operating status signals are monitored in real time. If an abnormal signal is detected, an audible and visual alarm is triggered, and the faulty part is marked. Manually or automatically switch between the main equipment and the corresponding backup equipment at the faulty location, and perform maintenance and repair on the main equipment at the faulty location.

8. The method for redundancy and intelligent switching of the blast furnace top pressure equalization and venting system as described in claim 7, characterized in that, Step S3 further includes: When switching between the primary and backup equipment at the faulty location, dual protection is provided by electrical and mechanical interlocks.

9. The method for redundancy and intelligent switching of the blast furnace top pressure equalization and venting system as described in claim 7, characterized in that: When the gas recovery valve malfunctions, fix the gas recovery valve in the open position and switch to the standby gas recovery valve. After the switch is completed, close the isolation valves at both ends of the gas recovery valve and isolate, repair or replace the gas recovery valve. When the upper equalization valve fails to close properly, fix the upper equalization valve in the open position, switch to the corresponding upper equalization standby valve, and after the switch is completed, close the isolation valves at both ends of the upper equalization valve to isolate, repair or replace the upper equalization valve.

10. The method for redundancy and intelligent switching of the blast furnace top pressure equalization and venting system as described in claim 7, characterized in that: When the main hydraulic valve platform and / or main pipeline fails, the system switches to the corresponding main hydraulic standby valve platform, opens the ball valve between the standby pipeline and each valve cylinder, and closes the isolation valve on the main pipeline, thereby switching the hydraulic power source so that the main hydraulic standby valve platform provides hydraulic power to the corresponding valve.

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