Processing method for non-continuous valve blocking of electromagnetic reversing valve of hydraulic system

Abstract

The invention discloses a hydraulic system electromagnetic reversing valve non-continuous valve clamping treatment method, and relates to the technical field of blast furnace hot blast stove metallurgical equipment.The method comprises the steps that different workers are correspondingly arranged in a hydraulic station to conduct continuous opening and closing actions on a valve with a non-continuous valve clamping valve in the blast furnace hot blast stove furnace changing interval, and the non-continuous valve clamping valve is opened and closed; the operation is stopped until the electromagnetic reversing valve is jammed; the first high-pressure stop valve and the AB opening high-pressure stop valve are closed, hung and locked; disassembling, cleaning and assembling the electromagnetic reversing valve, and reassembling the assembled electromagnetic reversing valve to the original valve station; unlocking and delisting are conducted, and the first high-pressure stop valve and the AB opening high-pressure stop valve are opened so that the electromagnetic reversing valve can be put into use. The problem that in the production process, normal production of the blast furnace hot blast stove is seriously affected by sudden failures such as discontinuity valve clamping of the electromagnetic reversing valve caused by foreign matter clamping due to foreign matter existing in hydraulic system pipeline oil liquid is solved.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace hot blast stove metallurgical equipment, and in particular to a method for processing a discontinuous valve jam of an electromagnetic reversing valve in a hydraulic system. Background Art

[0002] The existing large-scale hot blast furnace adopts a mode of two burning and two sending hot blast furnaces with a total of four hot blast furnaces matched with two preheating furnaces. The existing large-scale hot blast furnace has a total of about 190 hydraulic circuits controlled by hydraulic actuator cylinders, and these valves are all automatically controlled; in daily use, hydraulic system valve jams, equipment failure and other faults often occur. The reason is that foreign matter in the hydraulic circuit cannot be removed, and at a certain moment it reaches the hydraulic valve, which will cause the valve to fail to operate and jam. Since the time interval between the valves of the hot blast furnace is short and the hydraulic pipeline is long, the longest can reach about 200m, and the shortest is about 30m. It is difficult to replace all the hydraulic oil in the hydraulic pipeline or purify the hydraulic oil in the entire hydraulic pipeline without dead ends in a short time without affecting production.

[0003] Due to the tight production schedule and fast pace of blast furnace hot blast furnace, the way to deal with this situation in the past was that the production personnel went to the hydraulic station to find the corresponding electromagnetic reversing valve of the corresponding valve station to implement mechanical valve-poking operation to open and close the valve to ensure the normal operation of production. If the maintenance personnel were notified to replace the electromagnetic reversing valve at this time, due to the mechanical valve-poking operation, the foreign matter would flow to other parts with the oil. At this time, the foreign matter was not inside the valve body of the electromagnetic reversing valve. Replacing the new electromagnetic reversing valve could not change the status quo of the non-continuous valve jam. After the replacement, the jamming phenomenon still occurred. Since the foreign matter is still inside the hydraulic system, according to the on-site production situation, the foreign matter will flow into the valve core with the oil after the valve is switched two or three times, causing jamming. Since the production of blast furnace hot blast furnace is a 24-hour uninterrupted production process, the frequent occurrence of non-continuous jamming of the electromagnetic reversing valve not only causes great trouble to the operation of the production operators, but also has a serious impact on the normal operation of the blast furnace hot blast furnace. How to effectively solve the problem of non-continuous jamming of the electromagnetic reversing valve to ensure the normal operation of the blast furnace hot blast furnace. It has become a difficult problem that all equipment managers in the ironmaking operation department have been trying hard to think about and urgently need to solve. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] The present application proposes a method for processing a discontinuous valve jam of an electromagnetic reversing valve in a hydraulic system, comprising:

[0006] Different staff members are arranged in the hydraulic station to continuously open and close the valves with non-continuous stuck valves during the interval of hot blast furnace replacement, until the electromagnetic reversing valve is stuck and stops operating;

[0007] Close the first high-pressure shut-off valve and the AB port high-pressure shut-off valve and lock them with tags;

[0008] Disassemble, clean and assemble the electromagnetic reversing valve, and reinstall the assembled electromagnetic reversing valve to the original valve station;

[0009] Unlock and remove the card, open the first high-pressure gate valve and the AB port high-pressure gate valve to put the electromagnetic reversing valve into use.

[0010] In a feasible implementation manner, the disassembling, cleaning and assembling of the electromagnetic reversing valve and reinstalling the assembled electromagnetic reversing valve to the original valve station includes:

[0011] The electromagnetic reversing valve is removed and disassembled, and the disassembled parts are marked in sequence according to the order of removal;

[0012] Clear the foreign matter inside the valve body and valve core of the disassembled electromagnetic reversing valve, and assemble it in reverse order according to the above-mentioned marking sequence after cleaning;

[0013] Reinstall the assembled solenoid reversing valve to the original valve station.

[0014] In a feasible implementation manner, after the assembled electromagnetic reversing valve is reinstalled to the original valve station, the method further includes:

[0015] Tighten the solenoid reversing valve that has been reinstalled to the original valve station by tightening the high-strength hexagon socket connecting bolts diagonally.

[0016] In a feasible implementation manner, before the assembled electromagnetic reversing valve is reinstalled to the original valve station, the method further includes:

[0017] Cleaning the upper surface of the valve table in contact with the electromagnetic reversing valve with a cleaning agent;

[0018] After cleaning is completed, the sealing ring of the electromagnetic reversing valve is aligned with the sealing port and then reinstalled.

[0019] In a feasible implementation manner, the staff includes maintenance personnel, production personnel in the hydraulic station and background production operators.

[0020] In a feasible implementation, before unlocking and removing the card, each staff member in the hydraulic station confirms the situation in turn until all staff members confirm that it is correct and then unlock and remove the card.

[0021] In a feasible implementation manner, after cleaning the foreign matter inside the valve body and the valve core of the disassembled electromagnetic reversing valve, the inside of the valve body, the valve core and various components are cleaned with a cleaning agent.

[0022] In a feasible implementation manner, the production personnel in the hydraulic station communicate with the backstage production operators through an intercom and issue action instructions.

[0023] In a feasible implementation manner, the AB port high-pressure shut-off valve includes an A port high-pressure shut-off valve and a B port high-pressure shut-off valve; the first high-pressure shut-off valve is a high-pressure shut-off valve close to the hydraulic pump.

[0024] In a feasible implementation manner, the electromagnetic reversing valve is a three-position four-way reversing valve.

[0025] In summary, the present application provides a method for handling the discontinuous stuck valve of the electromagnetic reversing valve in a hydraulic system, comprising: arranging different staff members in the hydraulic station to continuously switch the valve with discontinuous stuck valve during the furnace change interval of the blast furnace hot blast furnace until the electromagnetic reversing valve is stuck and stops operating; closing the first high-pressure gate valve and the AB port high-pressure gate valve and locking them with a sign; disassembling, cleaning and assembling the electromagnetic reversing valve, and reinstalling the assembled electromagnetic reversing valve to the original valve station; unlocking and removing the sign, opening the above-mentioned first high-pressure gate valve and the AB port high-pressure gate valve, so that the electromagnetic reversing valve is put into use.

[0026] The method for handling the discontinuous sticking of the hydraulic system and its electromagnetic reversing valve proposed in the present application solves the serious impact on the normal production of the blast furnace hot blast stove caused by sudden failures such as discontinuous sticking of the electromagnetic reversing valve caused by foreign matter in the hydraulic system pipeline oil during the production process, reduces the failure rate of the hydraulic system, extends the service life of the hydraulic components, reduces maintenance costs, is suitable for various types of high-pressure hydraulic system pipelines, and provides a strong guarantee for the smooth production of the blast furnace hot blast stove.

[0027] The hydraulic system and the method for handling the discontinuous stuck valve of the electromagnetic reversing valve proposed in the present application, and other advantages, objectives and features of the present application will be reflected in part through the following description, and will also be understood by technical personnel in the field through research and practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1A schematic flow chart of a method for handling a discontinuous valve jam of an electromagnetic reversing valve in a hydraulic system provided in an embodiment of the present application;

[0030] Figure 2 A structural schematic diagram of a blast furnace hot blast stove hydraulic system pipeline provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0032] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0033] The present application provides a method for handling discontinuous valve sticking of a hydraulic system and its electromagnetic reversing valve, so as to solve the serious impact on the normal production of a blast furnace hot blast stove caused by sudden failures such as discontinuous valve sticking of the electromagnetic reversing valve caused by foreign matter in the hydraulic system pipeline oil during the production process, thereby reducing the failure rate of the hydraulic system, extending the service life of hydraulic components, and reducing maintenance costs. The application is suitable for various types of high-pressure hydraulic system pipelines, and provides a strong guarantee for the smooth operation of the blast furnace hot blast stove.

[0034] See also Figure 1 , is a method for processing a discontinuous valve jam of an electromagnetic reversing valve in a hydraulic system provided by an embodiment of the present application, specifically as follows Figure 1 As shown, it is a schematic diagram of the process of a method for processing a discontinuous valve jam of an electromagnetic reversing valve in a hydraulic system proposed in the present application, including:

[0035] S110. Different staff members are arranged in the hydraulic station to continuously open and close the valves with non-continuous stuck valves during the interval of changing the hot blast furnace of the blast furnace until the electromagnetic reversing valve is stuck and stops operating.

[0036] In some examples, the staff includes maintenance personnel, production personnel within the hydraulic station, and back-end production operators.

[0037] For example, maintenance personnel bring relevant construction tools to the hydraulic station, and production personnel bring walkie-talkies to the hydraulic station. During the interval between hot blast furnace changes, production personnel in the hydraulic station use walkie-talkies to communicate with backstage production operators and issue instructions to continuously open and close the valve with non-continuous stuck valves until the solenoid reversing valve is stuck and stops operating.

[0038] S120, close the first high-pressure gate valve and the AB port high-pressure gate valve and lock them with a tag.

[0039] For example, the production staff in the hydraulic station quickly closes the first high-pressure gate valve and the AB port high-pressure gate valve and locks them with tags.

[0040] S130, disassemble, clean and assemble the electromagnetic reversing valve, and reinstall the assembled electromagnetic reversing valve to the original valve station.

[0041] For example, after the maintenance personnel have finished cleaning and assembling the electromagnetic reversing valve, they will quickly reinstall the electromagnetic reversing valve to the original valve station.

[0042] S140, unlock and remove the card, open the first high-pressure gate valve and the AB port high-pressure gate valve, so that the electromagnetic reversing valve is put into use.

[0043] For example, the production staff opens the first high-pressure shut-off valve and the AB port high-pressure shut-off valve and puts them into use.

[0044] In some examples, the solenoid reversing valve is a three-position four-way reversing valve.

[0045] Exemplarily, a one-way throttle valve, a one-way valve and an electromagnetic reversing valve are also provided on the valve platform; wherein the electromagnetic reversing valve is a three-position four-way reversing valve.

[0046] In some examples, the AB port high-pressure shut-off valve includes an A port high-pressure shut-off valve and a B port high-pressure shut-off valve; the first high-pressure shut-off valve is a high-pressure shut-off valve close to the hydraulic pump.

[0047] For example, Figure 2As shown, the hydraulic system may specifically include: a single-rod double-acting piston cylinder 1, a first high-pressure hose 2, a second high-pressure shut-off valve 3, a first hydraulic branch pipeline 4, an A-port high-pressure shut-off valve 5, a one-way throttle valve 6, a one-way valve 7, a three-position four-way reversing valve 8, a main pressure pipeline 9, a first high-pressure shut-off valve 10, a hydraulic pump 11, a second high-pressure hose 12, a third high-pressure shut-off valve 13, a second hydraulic branch pipeline 14, a B-port high-pressure shut-off valve 15, a valve station 16, a high-pressure check valve 17, an oil return main pipeline 18, a filter 19 and an oil tank 20.

[0048] The hydraulic pump 11, the first high-pressure shut-off valve 10, the main pressure pipeline 9, the valve station 16, the A-port high-pressure shut-off valve 5, the first hydraulic branch pipeline 4, the second high-pressure shut-off valve 3, the first high-pressure hose 2, the single-rod double-acting piston cylinder 1, the second high-pressure hose 12, the third high-pressure shut-off valve 13, the second hydraulic branch pipeline 14, the B-port high-pressure shut-off valve 15, the valve station 16, the high-pressure check valve 17, the return oil main pipeline 18, the filter 19 and the oil tank 20 are connected in sequence to form a working circuit.

[0049] In summary, the method for handling the discontinuous sticking of the electromagnetic reversing valve in the hydraulic system proposed in the embodiment of the present application solves the serious impact of sudden failures such as the discontinuous sticking of the electromagnetic reversing valve caused by foreign matter in the hydraulic system pipeline oil during the production process on the normal production of the blast furnace hot blast stove, reduces the failure rate of the hydraulic system, extends the service life of hydraulic components, reduces maintenance costs, is suitable for all types of high-pressure hydraulic system pipelines, and provides a strong guarantee for the smooth production of the blast furnace hot blast stove.

[0050] In some examples, the disassembling, cleaning and assembling of the electromagnetic reversing valve and reinstalling the assembled electromagnetic reversing valve to the original valve station includes:

[0051] The electromagnetic reversing valve is removed and disassembled, and the disassembled parts are marked in sequence according to the order of removal;

[0052] Clear the foreign matter inside the valve body and valve core of the disassembled electromagnetic reversing valve, and assemble it in reverse order according to the above-mentioned marking sequence after cleaning;

[0053] Reinstall the assembled solenoid reversing valve to the original valve station.

[0054] For example, the maintenance personnel quickly use the special tools prepared in advance to dismantle the electromagnetic reversing valve and disassemble it, and mark the disassembled parts in the order of disassembly for reinstallation. After the disassembly, the foreign matter inside the valve body of the electromagnetic reversing valve, that is, the valve core, is cleared, and after cleaning, it is quickly assembled in reverse order according to the previously marked order. After the maintenance personnel have cleaned and assembled the electromagnetic reversing valve, they quickly reinstall the electromagnetic reversing valve to the original valve station.

[0055] In some examples, after the assembled solenoid reversing valve is reinstalled to the original valve station, the following steps are also included:

[0056] Tighten the solenoid reversing valve that has been reinstalled to the original valve station by tightening the high-strength hexagon socket connecting bolts diagonally.

[0057] For example, after the electromagnetic reversing valve is reinstalled to the original valve platform, the high-strength hexagon socket connection bolts are tightened diagonally. That is, after the electromagnetic reversing valve is reinstalled to the valve platform, the four high-strength hexagon socket bolts for fastening should be tightened diagonally to ensure that the sealing ring is evenly stressed and achieve the best sealing effect.

[0058] In some examples, before the assembled solenoid reversing valve is reinstalled back to the original valve station, the following steps are also included:

[0059] Cleaning the upper surface of the valve table in contact with the electromagnetic reversing valve with a cleaning agent;

[0060] After cleaning is completed, the sealing ring of the electromagnetic reversing valve is aligned with the sealing port and then reinstalled.

[0061] For example, before the electromagnetic reversing valve is assembled and reinstalled on the valve table, the upper surface of the valve table that contacts the electromagnetic reversing valve should be cleaned with a cleaning agent, and the sealing ring should be aligned with the sealing mouth before reinstalling. Precautions for installing the sealing ring of the electromagnetic reversing valve include: Check the sealing ring: Before installation, carefully check whether the sealing ring has defects such as damage, deformation, aging or cracks. If there is any damage, a new sealing ring should be replaced; Clean the installation part: Make sure that the sealing port of the valve and the surface in contact with it are clean, free of oil, dust, impurities and rust to ensure that the sealing ring can fit well; Correct installation direction: The sealing ring usually has a specific installation direction and must be installed according to the design requirements to ensure its sealing effect; Avoid excessive stretching or compression: Do not over-stretch or compress the sealing ring during installation to avoid affecting its elasticity and sealing performance; Uniform force: During the installation process, ensure that the sealing ring is evenly stressed to avoid deformation or damage caused by excessive local force; Apply an appropriate amount of lubricant: You can apply an appropriate amount of lubricant compatible with the working medium on the sealing ring to help installation and improve the sealing effect, but be careful not to use too much to avoid affecting the sealing performance; Careful operation: Be careful during installation to avoid using sharp tools or hard objects to touch the sealing ring to prevent scratches or damage; Check after installation: After installation, carefully check whether the sealing ring is installed in place and whether there is any distortion or extrusion.

[0062] In some examples, before unlocking and removing the card, each staff member in the hydraulic station confirms the situation in turn until all staff members confirm that it is correct and then unlock and remove the card.

[0063] For example, before unlocking and removing the relevant sign, all personnel working inside the hydraulic station need to confirm the relevant situation one by one. Only when each staff member confirms that there is no problem can the unlocking and removing of the sign be performed.

[0064] In some examples, after cleaning foreign matter from the interior of a valve body and a valve core of a disassembled electromagnetic reversing valve, a cleaning agent is used to clean the interior of the valve body, the valve core, and various components.

[0065] For example, after the foreign matter in the valve body and valve core of the electromagnetic reversing valve is cleaned, a cleaning agent is used to clean the valve body, valve core and various parts to ensure that the surfaces of various parts are smooth and clean. When cleaning the electromagnetic reversing valve, you need to pay attention to various safety precautions, such as: Power-off operation: Before cleaning, be sure to cut off the power supply related to the electromagnetic reversing valve to prevent electric shock accidents; Pressure release: If there is pressure in the system, the pressure should be completely released first to avoid injuries caused by high-pressure liquid spraying during disassembly and cleaning; Personal protection: Wear appropriate personal protective equipment, such as protective gloves, goggles, etc., to prevent the cleaning agent from splashing into the eyes or causing injury to the hands; Good ventilation: Ensure that the cleaning work is carried out in a well-ventilated environment to avoid the accumulation of harmful gases produced by the volatilization of the cleaning agent; Fire and explosion prevention: According to the characteristics of the cleaning agent, take fire and explosion prevention measures to stay away from personal injury or component damage; Component placement: The disassembled components should be properly placed to avoid loss or damage; Follow the regulations: Strictly follow the cleaning operating procedures and do not change the operating steps at will; Prevent misinstallation: When reassembling, ensure that all components are installed correctly to prevent equipment failure or safety accidents caused by installation errors; Environmental protection: Reasonably handle the waste and wastewater generated by cleaning to avoid pollution to the environment.

[0066] Furthermore, when cleaning the electromagnetic reversing valve, a variety of cleaning agents can be selected, for example, special industrial cleaning agents: this type of cleaning agent is specially designed for cleaning oil stains, impurities, etc. in industrial equipment, has good decontamination ability, and has good material compatibility with electromagnetic reversing valves; kerosene: kerosene has good solubility and can remove oil stains and impurities. At the same time, it is relatively safe and not easy to corrode the valve body; gasoline: gasoline has strong decontamination ability, but it is highly volatile and flammable. When using it, special attention should be paid to safety protection and fire prevention measures; environmentally friendly cleaning agents: such as some cleaning agents based on biodegradable materials, which are environmentally friendly and can also effectively remove dirt; non-corrosive organic solvents: such as acetone, ethanol, etc., but also pay attention to their volatility and flammability, use them in a well-ventilated environment, and take fire and explosion prevention measures.

[0067] At the same time, when choosing a cleaning agent suitable for a specific electromagnetic reversing valve, several aspects can be considered, such as the material of the valve body and valve core: understand the manufacturing materials of the electromagnetic reversing valve, such as metal (such as stainless steel, copper, aluminum, etc.), plastic or rubber parts. Make sure that the selected cleaning agent will not corrode, swell or otherwise damage these materials; Dirt type and degree: Analyze the dirt composition in the valve, whether it is oil, dust, rust or other impurities. Different cleaning agents have different cleaning effects on different types of dirt; Working environment and requirements: Consider the working environment of the electromagnetic reversing valve, whether it needs to meet specific environmental protection standards, whether there are explosion-proof requirements, etc.; Compatibility: Check the compatibility of the cleaning agent with the sealing materials, lubricants, etc. that may exist in the valve to prevent adverse effects on these parts during the cleaning process; Safety: Choose a low-toxic, non-flammable, and non-volatile cleaning agent to ensure the safety and health of the operator; Cleaning effect: Refer to the product description and user evaluation of the cleaning agent to understand its performance and effect in similar cleaning tasks; Cost: Under the premise of meeting the cleaning requirements, choose a cleaning agent with reasonable cost to control maintenance costs. Taking all the above factors into consideration, the most suitable cleaning agent for a specific solenoid reversing valve can be determined by testing a small number of samples or consulting a professional cleaning equipment supplier.

[0068] In addition, when choosing a cleaning agent, you need to consider factors such as the material of the solenoid valve, the type and degree of dirt, and the safety requirements of the working environment. At the same time, no matter which cleaning agent is chosen, it should be operated in accordance with relevant safety operating procedures.

[0069] In some examples, production personnel in the hydraulic station communicate with the back-end production operators via walkie-talkies and issue action instructions.

[0070] For example, the production staff working in the hydraulic station communicate with the production operators in the background through walkie-talkies and issue instructions about actions to the operators in the background. Using walkie-talkies to communicate and issue action instructions can achieve timely coordination and cooperation between different work positions during the work process to ensure the smooth progress and safety of production operations.

[0071] In summary, the method for handling the discontinuous sticking of the electromagnetic reversing valve in the hydraulic system provided by the present application solves the serious impact of sudden failures such as discontinuous sticking of the electromagnetic reversing valve caused by foreign matter in the hydraulic system pipeline oil during the production process on the normal production of the blast furnace hot blast furnace, reduces the failure rate of the hydraulic system, extends the service life of hydraulic components, and reduces maintenance costs. It is suitable for all kinds of high-pressure hydraulic system pipelines and truly achieves twice the result with half the effort. The method is used to deal with the hidden dangers of such hydraulic equipment in the bud, greatly reduces the labor intensity of employees, and improves labor efficiency, provides a strong guarantee for the stable operation of the blast furnace hot blast furnace equipment, extends the service life of the hydraulic system equipment, reduces maintenance costs, reduces equipment failures, and ensures the smooth production of the blast furnace hot blast furnace. At the same time, the method can be promoted and applied to other similar hydraulic systems and has a wide range of applications.

[0072] The present application is described with reference to flowcharts and / or block diagrams of methods according to embodiments of the present application.

[0073] It should be noted that the above embodiments are only the best examples, and are not intended to limit the implementation methods of the present application. Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

[0074] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0075] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0076] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0077] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for handling discontinuous valve sticking of an electromagnetic reversing valve in a hydraulic system, characterized in that: include: Different staff members are arranged in the hydraulic station to continuously open and close the valves with non-continuous stuck valves during the interval of hot blast furnace replacement, until the electromagnetic reversing valve is stuck and stops operating; Close the first high-pressure shut-off valve and the AB port high-pressure shut-off valve and lock them with tags; Disassemble, clean and assemble the electromagnetic reversing valve, and reinstall the assembled electromagnetic reversing valve to the original valve station; Unlock and remove the card, open the first high-pressure gate valve and the AB port high-pressure gate valve to put the electromagnetic reversing valve into use.

2. The method for processing the discontinuous valve sticking of the electromagnetic reversing valve in the hydraulic system according to claim 1 is characterized in that: The disassembling, cleaning and assembling of the electromagnetic reversing valve and reinstalling the assembled electromagnetic reversing valve to the original valve station include: The electromagnetic reversing valve is removed and disassembled, and the disassembled parts are marked in sequence according to the order of removal; Clear the foreign matter inside the valve body and valve core of the disassembled electromagnetic reversing valve, and assemble in reverse order according to the above-mentioned marking sequence after cleaning; Reinstall the assembled solenoid reversing valve to the original valve station.

3. The method for processing the discontinuous valve sticking of the electromagnetic reversing valve in the hydraulic system according to claim 1 is characterized in that: After the assembled solenoid reversing valve is reinstalled to the original valve station, it also includes: Tighten the solenoid reversing valve that has been reinstalled to the original valve station by tightening the high-strength hexagon socket connecting bolts diagonally.

4. The method for processing a discontinuous valve jam of a solenoid reversing valve in a hydraulic system according to claim 1, characterized in that: Before the assembled solenoid reversing valve is reinstalled to the original valve station, it also includes: Cleaning the upper surface of the valve table in contact with the electromagnetic reversing valve with a cleaning agent; After cleaning is completed, the sealing ring of the electromagnetic reversing valve is aligned with the sealing port and then reinstalled.

5. The method for processing a discontinuous valve jam of a solenoid reversing valve in a hydraulic system according to claim 1, characterized in that: The staff includes maintenance personnel, production personnel in the hydraulic station and back-end production operators.

6. The method for processing a discontinuous valve jam of a solenoid reversing valve in a hydraulic system according to claim 1, characterized in that: Before unlocking and removing the sign, each staff member in the hydraulic station will confirm the situation in turn until all staff members have confirmed that it is correct and then unlock and remove the sign.

7. The method for processing a discontinuous valve jam of a solenoid reversing valve in a hydraulic system according to claim 2, characterized in that: After cleaning the foreign matter inside the valve body and the valve core of the disassembled electromagnetic reversing valve, the inside of the valve body, the valve core and various parts are cleaned by a cleaning agent.

8. The method for processing a discontinuous valve jam of a solenoid reversing valve in a hydraulic system according to claim 5, characterized in that: The production personnel in the hydraulic station communicate with the backstage production operators through walkie-talkies and issue action instructions.

9. The method for processing a discontinuous valve jam of a solenoid reversing valve in a hydraulic system according to claim 1, characterized in that: The AB port high-pressure shut-off valve includes an A port high-pressure shut-off valve and a B port high-pressure shut-off valve; the first high-pressure shut-off valve is a high-pressure shut-off valve close to the hydraulic pump.

10. The method for processing a discontinuous valve sticking of a solenoid reversing valve in a hydraulic system according to claim 1, characterized in that: The electromagnetic reversing valve is a three-position four-way reversing valve.

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