Online oil purification device and method for pipeline of blast furnace hydraulic system

Abstract

The application provides a kind of blast furnace hydraulic system pipeline oil online oil purification device and method, it is related to blast furnace metallurgical equipment technical field, main pressure pipeline;High pressure cut door, high pressure hose, oil filter, oil tank, cut-off assembly, main pressure pipeline, high pressure cut door, high pressure hose, oil filter, oil tank are sequentially connected, after cut-off assembly is closed, main pressure pipeline, high pressure cut door, high pressure hose, oil filter, oil tank form closed circulation oil purification loop.The application provides a kind of blast furnace hydraulic system pipeline oil online oil purification device, avoids that the hydraulic system pipeline oil cannot be purified for a long time and causes the serious influence that the sudden failure of foreign matter card control valve brings to the normal production of blast furnace, reduces the failure rate of hydraulic system, prolongs the service life of hydraulic component, reduces maintenance cost, applicable to all kinds of high pressure hydraulic system pipeline, provides strong guarantee for the smooth production of blast furnace.

Description

Technical Field

[0001] This application relates to the field of blast furnace metallurgical equipment technology, and in particular to an online oil purification device and method for blast furnace hydraulic system pipelines. Background Technology

[0002] In current technology, the development of large-scale blast furnaces is a manifestation of the current improvement in the technological level of blast furnace ironmaking equipment and an inevitable trend. However, the increasing size of blast furnaces places new demands on blast furnace equipment, requiring it to develop towards larger, more intelligent, and environmentally friendly designs to meet the production requirements of large blast furnaces. Existing large blast furnace hot blast stoves have approximately 190 hydraulically controlled cylinder-controlled hydraulic circuits, all of which are automatically controlled. The tapping equipment at the furnace front also uses a hydraulic system, with a total of 64 hydraulic control circuits. The furnace top charging equipment uses a fully automatic hydraulic system, with 57 hydraulically controlled cylinder-controlled hydraulic circuits. After long-term online use, these hydraulic control circuits frequently experience malfunctions such as valve jamming and equipment malfunction. The reason for this is that the hydraulic control circuits are too long, ranging from about 30 to 180 meters in length. The majority of the actuators are double-acting single-rod piston cylinders, which prevents the hydraulic oil in the hydraulic lines from forming a complete circulation for filtration and purification. Foreign matter that has been present in the hydraulic lines for a long time cannot be eliminated and may accumulate in the hydraulic valves, causing them to malfunction. There are many such examples. Due to long pipelines, small cylinder volume, and lack of circulation and filtration of hydraulic oil, the quality of hydraulic oil gradually decreases, which seriously affects the normal production of blast furnace. Blast furnace production is a 24-hour uninterrupted production process. How to ensure the long-term stable operation of the 311 hydraulic control circuits in the maintenance area has become a problem that everyone in the equipment management office of the ironmaking operation department has been thinking about and solving.

[0003] Challenges of online oil purification and circulation in hydraulic pipelines: 1. The existing blast furnace area has as many as 311 hydraulic control circuits, all of which are online, making it impossible to use a general circulation method by disassembling pipeline joints for circulation. 2. A previous attempt to purify the hydraulic fluid by short-circuiting the A and B ports of the control circuit to the actuator cylinder interface with high-pressure hoses was unsatisfactory. The reason is that foreign objects in the hydraulic pipelines would remain inside the hydraulic valves during the circulation process, causing obstruction. How to ensure the cleanliness of the hydraulic system by purifying the hydraulic fluid online in the blast furnace hydraulic system is a pressing problem that needs to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide an online oil purification device and method for the pipeline of a blast furnace hydraulic system, which has the beneficial effects of reducing the failure rate of the hydraulic system, extending the service life of hydraulic components, and providing a strong guarantee for the smooth and stable production of the blast furnace, thereby solving the problems mentioned in the background art.

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

[0006] An online oil purification device for blast furnace hydraulic system pipelines, comprising:

[0007] Main pressure piping;

[0008] High-pressure shut-off valve; the main pressure pipeline is connected to the high-pressure shut-off valve.

[0009] High-pressure hose, which connects to the high-pressure valve;

[0010] Oil filter, connected to high-pressure shut-off valve;

[0011] Fuel tank, connected to oil filter;

[0012] The shut-off assembly is connected to the main pressure pipeline;

[0013] The main pressure pipeline, high pressure valve, high pressure hose, oil filter, and oil tank are connected in sequence. After the shut-off assembly is closed, the main pressure pipeline, high pressure valve, high pressure hose, oil filter, and oil tank form a closed-loop oil purification circuit.

[0014] The high-voltage shut-off valves include a first high-voltage shut-off valve, a second high-voltage shut-off valve, a third high-voltage shut-off valve, and a fourth high-voltage shut-off valve.

[0015] The first high-pressure valve is connected to the main pressure pipeline. The first high-pressure valve is connected to the second high-pressure valve via a high-pressure hose. The second high-pressure valve is connected to the third high-pressure valve via a high-pressure hose. The third high-pressure valve is connected to the fourth high-pressure valve via a high-pressure hose. The fourth high-pressure valve is connected to the oil filter. The pressurized oil passes sequentially through the main pressure pipeline, the first high-pressure valve, the high-pressure hose, the second high-pressure valve, the high-pressure hose, the third high-pressure valve, the high-pressure hose, and the fourth high-pressure valve.

[0016] A single-rod double-acting piston cylinder is connected to the high-pressure hose.

[0017] The hydraulic valve control valve includes a check valve, a three-position four-way directional valve and a one-way throttle valve. The check valve is connected to the fourth high-pressure shut-off valve, the three-position four-way directional valve is connected to the check valve, and the one-way throttle valve is connected to the shut-off assembly.

[0018] The hydraulic lock is connected to a one-way throttle valve and a three-position four-way directional valve, respectively.

[0019] The shut-off assembly includes a blast furnace high-pressure shut-off valve and an AB port shut-off valve. The blast furnace high-pressure shut-off valve is connected to the main pressure pipeline, and the AB port shut-off valve is connected to the one-way throttle valve. After the blast furnace high-pressure shut-off valve and the AB port shut-off valve are closed, the hydraulic valve control valve and the hydraulic lock are sealed, and the pressure oil in the main pressure pipeline does not pass through the hydraulic valve control valve and the hydraulic lock.

[0020] As a further aspect of the present invention: a plug is installed on the outside of the high-pressure shut-off valve to seal the high-pressure shut-off valve and prevent oil leakage.

[0021] Based on the same inventive concept, this application also provides an online oil purification method for blast furnace hydraulic system pipelines, the online oil purification method for blast furnace hydraulic system pipelines comprising:

[0022] Step 1: Before circulating clean oil, close the blast furnace high-pressure shut-off valve and AB port shut-off valve, and use the one-way valve of the return oil pipeline to achieve the backflow prevention function. After the blast furnace high-pressure shut-off valve and AB port shut-off valve are closed, close the hydraulic valve control valve and hydraulic lock. The pressure oil in the main pressure pipeline does not pass through the hydraulic valve control valve to prevent foreign objects in the pipeline from entering the hydraulic valve control valve during circulation.

[0023] Step 2: Add a first high-pressure valve, a second high-pressure valve, a third high-pressure valve and a fourth high-pressure valve to the hydraulic pipeline. When not in use, seal the other end of the high-pressure valve with a plug to prevent oil leakage.

[0024] Step 3: Connect the pipeline between the first high-pressure valve and the second high-pressure valve through a high-pressure hose. Use the high-pressure hose to connect the rigid pipe at the AB port of the oil cylinder interface. Then connect the third high-pressure valve and the fourth high-pressure valve through a high-pressure hose to form a closed-loop oil purification system.

[0025] Step 4: Start the hydraulic pump to safely and quickly circulate and purify the hydraulic fluid in the hydraulic lines.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] This application provides an online oil purification device for blast furnace hydraulic system pipelines, which avoids the serious impact on normal blast furnace production caused by foreign objects getting stuck in control valves due to the hydraulic system pipelines not being purified for a long time. The application of this device reduces the failure rate of the hydraulic system, extends the service life of hydraulic components, reduces maintenance costs, and reduces the labor intensity of maintenance personnel. It is applicable to various high-pressure hydraulic system pipelines and provides a strong guarantee for the smooth and stable production of blast furnaces. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0030] Figure 1 This is a schematic diagram of the cleaned state of an online oil purification device for a blast furnace hydraulic system pipeline, provided in an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the structure of an online oil purification device for a blast furnace hydraulic system in a non-purified state, as provided in an embodiment of this application.

[0032] Figure 3 for Figure 1 A magnified view of part A in the image.

[0033] Markings in the image:

[0034] 1. Oil tank; 2. Oil filter; 3. Main pressure pipeline; 4. Check valve; 5. Blast furnace high-pressure shut-off valve; 6. Three-position four-way directional valve; 7. Hydraulic lock; 8. One-way throttle valve; 9. AB port shut-off valve; 10. Single-rod double-acting piston cylinder; 11. High-pressure hose; 12. Second high-pressure shut-off valve; 13. Third high-pressure shut-off valve; 14. First high-pressure shut-off valve; 15. Fourth high-pressure shut-off valve. Detailed Implementation

[0035] 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] Please refer to the attached document. Figures 1-3 This application provides an online oil purification device for the pipeline of a blast furnace hydraulic system, comprising:

[0037] Main pressure line 3;

[0038] The high-pressure valve is connected to the main pressure pipeline 3 via a pipeline.

[0039] High-pressure hose 11 is connected to the high-pressure valve via a pipe.

[0040] Oil filter 2 is connected to the high-pressure shut-off valve via a pipeline;

[0041] Oil tank 1 is connected to oil filter 2 via a pipeline;

[0042] The shut-off assembly is connected to the main pressure line 3 via a pipe.

[0043] The main pressure pipeline 3, high-pressure shut-off valve, high-pressure hose 11, oil filter 2, and oil tank 1 are connected sequentially via pipelines. After the shut-off assembly is closed, the main pressure pipeline 3, high-pressure shut-off valve, high-pressure hose 11, oil filter 2, and oil tank 1 form a closed-loop oil purification circuit. This application provides an online oil purification device for blast furnace hydraulic system pipelines, avoiding the serious impact on normal blast furnace production caused by foreign objects getting stuck in control valves due to prolonged lack of purification of hydraulic system pipeline oil. The application of this device reduces the failure rate of the hydraulic system, extends the service life of hydraulic components, reduces maintenance costs, and reduces the labor intensity of maintenance personnel. It is applicable to various high-pressure hydraulic system pipelines, providing a strong guarantee for the smooth and stable production of blast furnaces.

[0044] In a preferred embodiment of the present invention, the high-voltage shut-off valve includes:

[0045] The first high-pressure shut-off valve 14 is connected to the main pressure pipeline 3 via a pipeline.

[0046] The second high-voltage shut-off valve 12 is connected to the first high-voltage shut-off valve 14 via a high-voltage hose 11.

[0047] The third high-voltage shut-off valve 13 is connected to the second high-voltage shut-off valve 12 via a high-voltage hose 11.

[0048] The fourth high-pressure valve 15, the third high-pressure valve 13 and the fourth high-pressure valve 15 are connected by a high-pressure hose 11, and the fourth high-pressure valve 15 is connected to the oil filter 2 by a pipeline.

[0049] The pressurized oil passes sequentially through the main pressure pipeline 3, the first high-pressure valve 14, the high-pressure hose 11, the second high-pressure valve 12, the high-pressure hose 11, the third high-pressure valve 13, the high-pressure hose 11, and the fourth high-pressure valve 15.

[0050] A preferred embodiment of the present invention includes a single-rod double-acting piston cylinder 10, which is connected to a high-pressure hose 11.

[0051] A preferred embodiment of the present invention includes a hydraulic valve control valve, the hydraulic valve control valve comprising:

[0052] One-way valve 4 is connected to the fourth high-pressure shut-off valve 15 via a pipeline;

[0053] Three-position four-way directional valve 6, which is connected to check valve 4 via a pipeline;

[0054] One-way throttle valve 8 is connected to the shut-off assembly via a pipe.

[0055] In a preferred embodiment of the present invention, a hydraulic lock 7 is included, which is connected to a one-way throttle valve 8 and a three-position four-way directional valve 6 via pipelines.

[0056] In a preferred embodiment of the present invention, the shut-off component includes:

[0057] Blast furnace high-pressure shut-off valve 5 is connected to the main pressure pipeline 3 via a pipeline.

[0058] AB port stop valve 9 is connected to one-way throttle valve 8 via a pipeline;

[0059] After the blast furnace high-pressure shut-off valve 5 and AB port shut-off valve 9 are closed, the hydraulic valve control valve and hydraulic lock 7 are sealed. The pressure oil in the main pressure pipeline 3 does not pass through the hydraulic valve control valve and hydraulic lock 7, so as to prevent foreign objects in the pipeline from entering the hydraulic valve control valve during circulation.

[0060] In a preferred embodiment of the present invention, a plug is installed on the outside of the high-pressure shut-off valve to seal the high-pressure shut-off valve and prevent oil leakage.

[0061] Based on the same inventive concept, this application also provides an online oil purification method for blast furnace hydraulic system pipelines, the online oil purification method for blast furnace hydraulic system pipelines includes:

[0062] Step 1: Before circulating clean oil, close the blast furnace high pressure valve 5 and AB port valve 9, and use the one-way valve 4 of the return oil pipeline to achieve the backflow prevention function. After the blast furnace high pressure valve 5 and AB port valve 9 are closed, close the hydraulic valve control valve and hydraulic lock 7. The pressure oil in the main pressure pipeline 3 does not pass through the hydraulic valve control valve to prevent foreign objects in the pipeline from entering the hydraulic valve control valve during circulation.

[0063] Step 2: Add a first high-pressure valve 14, a second high-pressure valve 12, a third high-pressure valve 13 and a fourth high-pressure valve 15 to the hydraulic pipeline. When not in use, seal the other end of the high-pressure valve with a plug to prevent oil leakage.

[0064] Step 3: Connect the pipeline between the first high-pressure valve 14 and the second high-pressure valve 12 through the high-pressure hose 11. Use the high-pressure hose 11 to connect the rigid pipe at the AB port of the oil cylinder interface. Then connect the third high-pressure valve 13 and the fourth high-pressure valve 15 through the high-pressure hose 11 to form a closed-loop oil purification system.

[0065] Step 4: Start the hydraulic pump to safely and quickly circulate and purify the hydraulic fluid in the hydraulic lines.

[0066] This application provides an online oil purification device for blast furnace hydraulic system pipelines, which has two working states: oil purification state and normal working state. In the oil purification state, the hydraulic system pipelines are purified in a closed manner, while in the normal working state, the blast furnace is in normal production. The circulating oil purification circuit of the online oil purification device for blast furnace hydraulic system pipelines provided in this application is as follows: main pressure pipeline 3, first high-pressure valve 14, second high-pressure valve 12, high-pressure hose 11, third high-pressure valve 13, fourth high-pressure valve 15, oil filter 2, and oil tank 1. The oil purification circuit can achieve online oil purification for one blast furnace hydraulic system pipeline by continuously circulating for 20 minutes. After circulating multiple hydraulic control circuits, the oil filter 2 is switched to the standby side, and the filter element of the oil filter 2 is replaced. The first high-pressure valve 14, the second high-pressure valve 12, the third high-pressure valve 13, and the fourth high-pressure valve 15 are all closed. The high-pressure hose 11 is disassembled, and a plug is installed on the outside of the high-pressure valve to seal it. The high-pressure hose 11 is connected to the AB port of the single-rod double-acting piston cylinder 10. Opening the blast furnace high-pressure shut-off valve 5 and AB port shut-off valve 9 will restore the normal operation of the blast furnace hydraulic control circuit.

[0067] By adopting an online oil purification method for blast furnace hydraulic system pipelines, the method fully meets the requirements for standardized and regulated circulation of blast furnace hydraulic systems. The process is significantly more reasonable, safer, and faster than the previous method of dismantling the entire hydraulic pipeline for circulation, and it also extends the service life of hydraulic control valves. This achieves a truly efficient and effective result, completely solving the problems of long pipelines, small cylinder volumes, and insufficient hydraulic oil circulation and filtration in blast furnace hydraulic systems, which lead to a gradual decline in hydraulic oil quality and serious impacts on hydraulic control valves. This method addresses potential problems in hydraulic equipment at their inception, significantly reducing equipment failures, lowering the workload of workers, improving work efficiency, providing a favorable guarantee for the stable operation of blast furnace equipment, extending the service life of hydraulic system equipment, reducing maintenance costs, minimizing equipment failures, and ensuring smooth and stable blast furnace production. Furthermore, this method can be applied to various high-pressure pipelines, demonstrating a wide range of applications.

[0068] This application provides an online oil purification device for blast furnace hydraulic system pipelines, which avoids the serious impact on normal blast furnace production caused by foreign objects getting stuck in control valves due to the hydraulic system pipelines not being purified for a long time. The application of this device reduces the failure rate of the hydraulic system, extends the service life of hydraulic components, reduces maintenance costs, and reduces the labor intensity of maintenance personnel. It is applicable to various high-pressure hydraulic system pipelines and provides a strong guarantee for the smooth and stable production of blast furnaces.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] In the description of this application, 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, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0071] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An online oil purification device for blast furnace hydraulic system pipelines, characterized in that, include: Main pressure piping; High-pressure shut-off valve; the main pressure pipeline is connected to the high-pressure shut-off valve. High-pressure hose, which connects to the high-pressure valve; Oil filter, connected to high-pressure shut-off valve; Fuel tank, connected to oil filter; The shut-off assembly is connected to the main pressure pipeline; The main pressure pipeline, high pressure valve, high pressure hose, oil filter, and oil tank are connected in sequence. After the shut-off assembly is closed, the main pressure pipeline, high pressure valve, high pressure hose, oil filter, and oil tank form a closed-loop oil purification circuit. The high-pressure valve includes a first high-pressure valve, a second high-pressure valve, a third high-pressure valve, and a fourth high-pressure valve. The first high-pressure valve is connected to the main pressure pipeline. The first high-pressure valve and the second high-pressure valve are connected through a high-pressure hose. The second high-pressure valve and the third high-pressure valve are connected through a high-pressure hose. The third high-pressure valve and the fourth high-pressure valve are connected through a high-pressure hose. The fourth high-pressure valve is connected to the oil filter. The pressurized oil passes sequentially through the main pressure pipeline, the first high-pressure valve, the high-pressure hose, the second high-pressure valve, the high-pressure hose, the third high-pressure valve, the high-pressure hose, and the fourth high-pressure valve. A single-rod double-acting piston cylinder is connected to the high-pressure hose. The hydraulic valve control valve includes a check valve, a three-position four-way directional valve and a one-way throttle valve. The check valve is connected to the fourth high-pressure shut-off valve, the three-position four-way directional valve is connected to the check valve, and the one-way throttle valve is connected to the shut-off assembly. The hydraulic lock is connected to a one-way throttle valve and a three-position four-way directional valve, respectively. The shut-off assembly includes a blast furnace high-pressure shut-off valve and an AB port shut-off valve. The blast furnace high-pressure shut-off valve is connected to the main pressure pipeline, and the AB port shut-off valve is connected to the one-way throttle valve. After the blast furnace high-pressure shut-off valve and the AB port shut-off valve are closed, the hydraulic valve control valve and the hydraulic lock are sealed, and the pressure oil in the main pressure pipeline does not pass through the hydraulic valve control valve and the hydraulic lock.

2. The online oil purification device for a blast furnace hydraulic system pipeline according to claim 1, characterized in that, A plug is installed on the outside of the high-pressure shut-off valve to seal it and prevent oil leakage.

3. A method for online oil purification of pipelines in a blast furnace hydraulic system, based on the online oil purification device for blast furnace hydraulic systems according to any one of claims 1 to 2, characterized in that, The online oil purification method for the blast furnace hydraulic system pipeline includes: Step 1: Before circulating clean oil, close the blast furnace high-pressure shut-off valve and AB port shut-off valve, and use the one-way valve of the return oil pipeline to achieve the backflow prevention function. After the blast furnace high-pressure shut-off valve and AB port shut-off valve are closed, close the hydraulic valve control valve and hydraulic lock. The pressure oil in the main pressure pipeline does not pass through the hydraulic valve control valve to prevent foreign objects in the pipeline from entering the hydraulic valve control valve during circulation. Step 2: Add a first high-pressure valve, a second high-pressure valve, a third high-pressure valve and a fourth high-pressure valve to the hydraulic pipeline. When not in use, seal the other end of the high-pressure valve with a plug to prevent oil leakage. Step 3: Connect the pipeline between the first high-pressure valve and the second high-pressure valve through a high-pressure hose. Use the high-pressure hose to connect the rigid pipe at the AB port of the oil cylinder interface. Then connect the third high-pressure valve and the fourth high-pressure valve through a high-pressure hose to form a closed-loop oil purification system. Step 4: Start the hydraulic pump to safely and quickly circulate and purify the hydraulic fluid in the hydraulic lines.

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