Fixing device and blast furnace

Abstract

The utility model discloses a fixing device and a blast furnace and relates to the technical field of blast furnace metallurgical equipment, the fixing device is used for fixing a connecting rod, the connecting rod is provided with a connecting hole, a hydraulic cylinder is fixed to an oil cylinder base, and the power output end of the hydraulic cylinder is hinged to the connecting rod. The first end of the adjusting rod is fixed to the fixing base, the second end of the adjusting rod is used for penetrating through the connecting hole in a clearance mode, and a threaded part is arranged on the adjusting rod; the adjusting assembly comprises two adjusting nuts, the adjusting nuts are detachably connected with the adjusting rod in a threaded mode, the size of the section, perpendicular to the axial direction of the adjusting rod, of each adjusting nut is larger than the size of the connecting hole, and the two adjusting nuts are arranged on the two sides of the connecting rod correspondingly; the position of the connecting rod on the adjusting rod is adjusted and fixed through the adjusting assembly, so that the power output end of the hydraulic cylinder is located at the limiting position, and pressure relief is conducted on the hydraulic cylinder. The problems that the space of a construction site is narrow, and oil cylinders and pin shafts are disassembled and assembled through cross operation are solved, and operation is convenient, rapid and safe.

Description

Technical Field

[0001] This application belongs to the technical field of blast furnace metallurgical equipment, specifically relating to a stationary device and a blast furnace. Background Technology

[0002] The blast furnace top charging equipment all adopts a complete set of PW parallel hopper bell-less top charging equipment. The ores, coke, and miscellaneous ores required for blast furnace smelting are stored separately in raw material bins according to type. According to the blast furnace charging system, the ores, miscellaneous ores, and coke are screened by weight according to regulations. The required raw materials and fuels are transported to the furnace top via N1 and N2 belts according to the charging sequence. Raw materials are loaded into the charging hopper via belts, charging troughs, and reversing feed valves. After each batch of ore (coke) is loaded, the upper sealing valve and gas recovery valve are closed, and the pressure equalization valve is opened to pressurize the charging hopper until the pressure inside the furnace is equal to the pressure inside. When the material level inside the furnace drops to the specified material line, the probe is raised to its original position, and the lower sealing valve is opened. The charging chute is started according to the charging angle and number of turns required by the operator, and the material is evenly distributed inside the furnace by controlling the opening of the flow regulating valve. After the charging hopper completes the feeding into the blast furnace and the lower sealing valve is closed, the high-pressure gas in the charging hopper must be released before opening the upper sealing valve. At this point, the recovery valve is opened. The high-pressure coal gas in the tank undergoes primary dust removal by the cyclone dust collector and then enters the bag filter for fine dust removal. The recovered coal gas after fine dust removal is then introduced into the caustic soda spraying tower. After the recovery valve is opened, the ejector is activated to introduce the low-pressure residual coal gas in the tank into the bag filter. Once the pressure in the tank drops to a level that allows the upper sealing valve to open, the recovery valve is closed and the ejector is stopped. The entire process takes 15 seconds, thus achieving full recovery of the coal gas. The upper sealing valve is then opened to refill the tank, and a probe is lowered to monitor the material level depth.

[0003] Under the trend of green development in blast furnace ironmaking, the continuous optimization and improvement of the blast furnace tapping system has led to an increase in the pressure inside the blast furnace, the amount of iron tapped at the tapping site, and the increased use of materials inside the furnace. This has increased the burden on the blast furnace top charging tank, and the valves driven by the hydraulic cylinders of the top charging system have increased operating frequency. Long-term operation under full recovery of blast furnace top gas and high load has caused the internal sealing gaps of the cylinders to increase, leading to pressure relief or wear of the pins. This has resulted in the valve plates of the upper and lower sealing valves, throttle valves, pressure equalization recovery and relief valves not closing tightly. Each blast furnace top charging system has multiple hydraulic control circuits that control the hydraulic cylinders and thus the valve plate opening and closing. The cylinders all use pins and connecting rods. During the connection, maintenance, and periodic replacement of hydraulic cylinders and pins, the confined space and the weight of the valve plate make disassembly and assembly extremely time-consuming and labor-intensive. Typically, multiple chain hoists are used to seal the connecting rod, and pry bars, hammers, and chain hoists are used to insert the pins into the holes at the connection points between the hydraulic cylinder and the connecting rod. The lack of a fine-tuning device often leads to multiple adjustments, and the confined space requires multiple people working simultaneously, resulting in low efficiency and significant safety hazards. This severely impacts blast furnace maintenance and places a heavy workload on maintenance personnel. Ensuring safe and rapid replacement of the hydraulic cylinders and pins at the furnace top is a problem that must be solved. Utility Model Content

[0004] This application provides a fixing device and a blast furnace, which aims to at least partially solve the technical problem of inconvenient maintenance of the current furnace top hydraulic cylinder.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] A first aspect of this application provides a fixing device for fixing a connecting rod whose one end is hinged to a rotating shaft and whose other end is hinged to the power output end of a hydraulic cylinder, characterized in that the connecting rod is provided with a connecting hole, and the fixing device includes:

[0007] Fixed base;

[0008] An adjusting rod, the first end of which is fixed to the fixed base, and the second end of which is used to pass through the connecting hole with a gap, and the adjusting rod is provided with a threaded part;

[0009] An adjusting assembly includes two adjusting nuts, which are detachably threaded to the adjusting rod. The cross-sectional dimension of the adjusting nut perpendicular to the axial direction of the adjusting rod is larger than the size of the connecting hole. The two adjusting nuts are respectively disposed on both sides of the connecting rod. The adjusting assembly adjusts and fixes the position of the connecting rod on the adjusting rod, so that the power output end of the hydraulic cylinder is in the extreme position, thereby depressurizing the hydraulic cylinder.

[0010] In some embodiments, the fixed base is provided with a mounting groove, and the first end of the adjusting rod is provided with a snap-fit ​​part that engages with the mounting groove.

[0011] In some embodiments, the snap-fit ​​portion and the mounting groove are clearance-fitted, and the clearance between the snap-fit ​​portion and the mounting groove is 1mm to 3mm.

[0012] In some embodiments, the adjusting rod is provided with a threaded portion, the connecting hole is an oblong hole, and the length direction of the connecting hole is parallel to the length direction of the connecting rod.

[0013] In some embodiments, the mounting base has a T-shaped cross-section.

[0014] In some embodiments, the mounting groove is a U-shaped groove.

[0015] In some embodiments, the transverse cross-section of the snap-fit ​​portion is I-shaped.

[0016] In some embodiments, a limit gauge is connected to the connecting rod, and the limit gauge is used to determine whether the hydraulic cylinder has reached its limit position.

[0017] In some embodiments, the hydraulic cylinder is a single-rod double-acting hydraulic cylinder.

[0018] A second aspect of this application provides a blast furnace, wherein the fixing device is provided on one side of each hydraulic cylinder of the blast furnace.

[0019] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0020] This application discloses a fixing device that connects a hydraulic cylinder's connecting rod to an adjusting rod. The adjusting assembly adjusts and fixes the position of the connecting rod on the adjusting rod, bringing the hydraulic cylinder's power output end to its limit position and releasing pressure. This solves the problems of limited space and overlapping operations at construction sites when disassembling and assembling cylinders and pins. It is convenient, quick, and safe to operate; replacement is simple, requiring fewer tools and is lightweight. It reduces the risk of major equipment accidents caused by severe wear and increased clearance in cylinders and pins, leading to valve plate sealing failure and forced blast furnace shutdown for maintenance. It also avoids the problems of various unpredictable factors introduced into the blast furnace during shutdown and ventilation processes. Furthermore, this device can be applied to various blast furnace top charging system cylinders, making it widely applicable.

[0021] This application discloses a blast furnace that solves the problems of limited space and overlapping operations in disassembling and assembling hydraulic cylinders and pins at construction sites by setting up a fixed device. The operation is convenient, quick, and safe; replacement is simple, requires fewer tools, and is lightweight. It reduces the risk of major equipment accidents caused by valve plate sealing failure due to severe wear and increased clearance of hydraulic cylinders and pins, which forces the blast furnace to shut down for maintenance. It also avoids the problems of various uncertain factors brought to the blast furnace during the shutdown and ventilation process. At the same time, this device can be applied to hydraulic cylinders of various top charging systems of blast furnaces, with a wide range of applications. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a fixing device according to an embodiment of this application;

[0024] Figure 2 This is a partial structural schematic diagram of a pneumatic head-generating device according to an embodiment;

[0025] Figure 3 This is a structural cross-sectional view of a buffer energy absorption device according to an embodiment.

[0026] The reference numerals in the attached drawings are explained as follows: 1. Cylinder base; 2. Hydraulic cylinder; 21. Shaft pin; 3. Connecting rod; 4. Fixed seat; 41. Mounting groove; 5. Adjusting rod; 51. Snap-fit ​​part; 52. Threaded part; 6. Limiting impact; 7. Adjusting nut. Detailed Implementation

[0027] To enable those skilled in the art to more clearly understand this application, the technical solutions in 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.

[0028] Please see Figure 1 .

[0029] Figure 1 This is a schematic diagram of a fixing device in an embodiment of this application. As shown in the figure, the device is used to fix the connecting rod to assist the hydraulic cylinder 2 on the blast furnace in depressurizing. The hydraulic cylinder 2 is fixed on the cylinder base 1. The power output end of the hydraulic cylinder 2 is connected to the connecting rod 3 through the shaft pin 21. The connecting rod 3 is provided with a connecting hole.

[0030] The fixing device includes:

[0031] Mounting base 4;

[0032] Adjusting rod 5, the first end of the adjusting rod 5 is fixed to the fixing base 4, the second end of the adjusting rod 5 is used to pass through the connecting hole with a gap, and the adjusting rod 5 is provided with a threaded part;

[0033] The adjustment assembly includes two adjusting nuts 7, which are detachably threaded to the adjusting rod 5. The cross-sectional dimension of the adjusting nut 7 perpendicular to the axial direction of the adjusting rod 5 is larger than the size of the connecting hole. The two adjusting nuts 7 are respectively located on both sides of the connecting rod 3. The adjusting assembly adjusts and fixes the position of the connecting rod 3 on the adjusting rod 5, bringing the power output end of the hydraulic cylinder 2 to its limit position and releasing pressure from the hydraulic cylinder 2. This solves the problems of limited space and overlapping operations in construction sites when disassembling and assembling cylinders and pins. It is convenient, quick, and safe to operate; replacement is simple, requiring fewer tools and is lightweight. It reduces the risk of major equipment accidents caused by severe wear and increased clearance of cylinders and pins leading to poor valve plate sealing and forced blast furnace shutdown for maintenance. It also avoids the problems of various unpredictable factors brought to the blast furnace during shutdown and ventilation. Furthermore, this device can be applied to various blast furnace top charging system cylinders, with a wide range of applications.

[0034] It is worth noting that the aforementioned connecting hole is an oblong hole, and the length direction of the connecting hole is parallel to the length direction of the connecting rod 3.

[0035] Please see Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the fixing base 4 of a fixing device in an embodiment of this application. Figure 3 This is a schematic diagram of the structure of the adjusting rod 5 of a fixing device in an embodiment of this application.

[0036] In some embodiments, the fixed base 4 is provided with a mounting groove 41, and the first end of the adjusting rod 5 is provided with a snap-fit ​​part 51 that engages with the mounting groove 41.

[0037] In some embodiments, the snap-fit ​​part 51 and the mounting groove 41 are fitted with a clearance, and the clearance between the snap-fit ​​part 51 and the mounting groove 41 is 1mm to 3mm, which facilitates fine adjustment of the position of the adjusting rod 5.

[0038] In some embodiments, the adjusting rod 5 is provided with a threaded portion 52, and the adjusting assembly includes two adjusting nuts 7, which are detachably threaded to the adjusting rod 5 and are disposed on both sides of the connecting rod 3.

[0039] In some embodiments, the mounting base has a T-shaped cross-section.

[0040] In some embodiments, the mounting groove 41 is a U-shaped groove.

[0041] In some embodiments, the transverse cross-section of the snap-fit ​​portion 51 is "I" shaped.

[0042] In some embodiments, a limit gauge 6 is connected to the connecting rod 3, and the limit gauge 6 is used to determine whether the hydraulic cylinder 2 has reached its limit position.

[0043] In some embodiments, the hydraulic cylinder 2 is a single-rod double-acting hydraulic cylinder.

[0044] In some embodiments, the method for testing the hydraulic cylinder 2 using this fixing device includes the following steps:

[0045] S1: Close the valve of hydraulic cylinder 2;

[0046] S2: Connect the adjusting rod 5 to the connecting hole on the connecting rod 3, and adjust the position using the nut.

[0047] S3: After the single-rod double-acting hydraulic cylinder 2 is depressurized through the pressure test point, the upper oil pipe of the single-rod double-acting hydraulic cylinder 2 is removed to depressurize.

[0048] S4: Adjust the adjusting nut 7 to create a gap between the pin and the single-rod double-acting hydraulic cylinder 2 and the connecting rod 3, thereby facilitating the disassembly of the pin and subsequently removing the cylinder base 1 and the old single-rod double-acting hydraulic cylinder 2.

[0049] S5: Install the new single-rod double-acting hydraulic cylinder 2 on the cylinder base 1, then adjust the adjusting rod 5 to align the hole at the connection point of the single-rod double-acting hydraulic cylinder 2 and the connecting rod 3, and install the new pin.

[0050] S6: Reinstall oil pipe.

[0051] S7: Open the valve to complete the installation. A second aspect of this embodiment provides a blast furnace, wherein the aforementioned fixing device is provided on one side of each hydraulic cylinder of the blast furnace.

[0052] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0053] This application discloses a fixing device that connects a hydraulic cylinder's connecting rod to an adjusting rod. The adjusting assembly adjusts and fixes the connecting rod on the adjusting rod, bringing the hydraulic cylinder's power output end to its limit position and releasing pressure. This solves the problems of limited space and overlapping operations at construction sites when disassembling and assembling cylinders and pins. The operation is convenient, quick, and safe; replacement is simple, requires few tools, and is lightweight. It reduces the risk of major equipment accidents caused by severe wear and increased clearance in cylinders and pins, leading to valve plate sealing failure and forced blast furnace shutdown for maintenance. It also avoids the problems of various unpredictable factors introduced into the blast furnace during shutdown and ventilation. Furthermore, this method can be applied to cylinders in various blast furnace top charging systems, making it widely applicable.

[0054] This application discloses a blast furnace that solves the problem of limited space and overlapping operations in disassembling and assembling hydraulic cylinders and pins at construction sites by setting up a fixed device. The operation is convenient, quick, and safe. The replacement method is simple, requires few tools, and is lightweight. It reduces the risk of major equipment accidents caused by valve plate sealing failure due to severe wear of hydraulic cylinders and pins, which forces the blast furnace to shut down for maintenance. It also avoids the problems of various uncertain factors brought to the blast furnace during the shutdown and ventilation process. At the same time, this method can be applied to hydraulic cylinders of various top charging systems of blast furnaces, with a wide range of applications.

[0055] Unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A fixing device for fixing a connecting rod, one end of which is hinged to a rotating shaft and the other end of which is hinged to the power output end of a hydraulic cylinder, characterized in that, The connecting rod is provided with a connecting hole, and the fixing device includes: Fixed base; An adjusting rod, the first end of which is fixed to the fixed base, and the second end of which is used to pass through the connecting hole with a gap, and the adjusting rod is provided with a threaded part; An adjusting assembly includes two adjusting nuts, which are detachably threaded to the adjusting rod. The cross-sectional dimension of the adjusting nut perpendicular to the axial direction of the adjusting rod is larger than the size of the connecting hole. The two adjusting nuts are respectively disposed on both sides of the connecting rod. The adjusting assembly adjusts and fixes the position of the connecting rod on the adjusting rod, so that the power output end of the hydraulic cylinder is in the extreme position, thereby depressurizing the hydraulic cylinder.

2. The fixing device according to claim 1, characterized in that, The fixed base is provided with a mounting groove, and the first end of the adjusting rod is provided with a snap-fit ​​part that engages with the mounting groove.

3. The fixing device according to claim 2, characterized in that, The snap-fit ​​part and the mounting groove are fitted with a clearance, and the clearance between the snap-fit ​​part and the mounting groove is 1mm to 3mm.

4. The fixing device according to claim 1, characterized in that, The connecting hole is an oblong hole, and the length direction of the connecting hole is parallel to the length direction of the connecting rod.

5. The fixing device according to claim 1, characterized in that, The mounting base has a "T" shaped cross-section.

6. The fixing device according to claim 2, characterized in that, The mounting groove is a U-shaped groove.

7. The fixing device according to claim 2, characterized in that, The transverse cross-section of the snap-fit ​​part is "I" shaped.

8. The fixing device according to claim 1, characterized in that, A limit gauge is connected to the connecting rod, which is used to determine whether the hydraulic cylinder has reached its limit position.

9. The fixing device according to claim 1, characterized in that, The hydraulic cylinder is a single-rod double-acting hydraulic cylinder.

10. A blast furnace, characterized in that, Each hydraulic cylinder of the blast furnace is provided with a fixing device as described in any one of claims 1 to 9 on one side.

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