Blast furnace blanking angle control mechanism and blast furnace blanking system

Abstract

The utility model discloses a blast furnace blanking angle control mechanism and a blast furnace blanking system, and belongs to the technical field of blast furnace metallurgical equipment. The blast furnace blanking angle control mechanism comprises a reversing chute, a connecting rod, a hydraulic cylinder, a hydraulic system, a detector and a control device, the hydraulic system comprises a three-position four-way electromagnetic proportional directional valve, and the three-position four-way electromagnetic proportional directional valve is connected with the hydraulic cylinder and used for controlling a piston rod of the hydraulic cylinder to act; the reversing chute is used for being rotationally connected with a furnace top supporting structure of the blast furnace discharging system, one end of the connecting rod is fixedly connected with the reversing chute, the other end of the connecting rod is rotationally connected with a piston rod of the hydraulic cylinder, and a cylinder body of the hydraulic cylinder is used for being rotationally connected with the furnace top supporting structure of the blast furnace discharging system. The detector is used for detecting the rotating angle of the reversing chute, and the control device is electrically connected with the three-position four-way electromagnetic proportional reversing valve and the detector.

Description

Technical Field

[0001] This application belongs to the technical field of blast furnace metallurgical equipment, and particularly relates to a blast furnace charging angle control mechanism and a blast furnace charging system. Background Art

[0002] The ores, coke, and miscellaneous ores required for blast furnace smelting are stored separately in the raw material bins according to their types. The ores, miscellaneous ores, and coke are screened according to the specified weights according to the blast furnace charging system, and the required raw fuels are transported to the furnace top by belt according to the charging sequence. The raw materials are loaded into the bunker from the belt through the furnace top bunker and the reversing chute. After each batch of ore (coke) is loaded, the upper sealing valve and the relief valve are closed, and the equalizing valve is opened to press the bunker to be equal to the furnace pressure; when the furnace burden surface drops to the specified burden line, the sounding rod is lifted to the original position, and the lower sealing valve is opened; the distributing chute is started according to the charging angle and the number of circles required by the foreman, and the material is evenly distributed in the furnace by controlling the opening of the material flow regulating valve. After the material is emptied, the lower sealing valve is closed, the recovery valve is opened to drain the pressure in the bunker, and then the upper sealing valve is opened to reload the material, and at the same time the sounding rod is lowered to monitor the depth of the burden surface.

[0003] In the related art, under the guiding action of the reversing chute, the furnace charge continuously flushes a point on the wear-resistant lining of the weighing hopper support, resulting in serious local wear and short service life of the wear-resistant lining of the weighing hopper support, affecting the production efficiency of the enterprise and increasing the production cost of the enterprise. Summary of the Utility Model

[0004] This application aims to at least solve to some extent the technical problem of the short service life of the wear-resistant lining of the weighing hopper support in the related art. To this end, this application provides a blast furnace charging angle control mechanism and a blast furnace charging system.

[0005] In a first aspect, an embodiment of this application provides a blast furnace charging angle control mechanism, including a reversing chute, a connecting rod, a hydraulic cylinder, a hydraulic system, a detector, and a control device; the hydraulic system includes a three-position four-way electromagnetic proportional reversing valve, and the three-position four-way electromagnetic proportional reversing valve is connected to the hydraulic cylinder for controlling the movement of the piston rod of the hydraulic cylinder; the reversing chute is used for rotatably connecting with the furnace top support structure of the blast furnace charging system, one end of the connecting rod is fixedly connected to the reversing chute, the other end of the connecting rod is rotatably connected to the piston rod of the hydraulic cylinder, and the cylinder body of the hydraulic cylinder is used for rotatably connecting with the furnace top support structure of the blast furnace charging system; the detector is used for detecting the rotation angle of the reversing chute, and the control device is electrically connected to both the three-position four-way electromagnetic proportional reversing valve and the detector.

[0006] In some embodiments, the reversing chute has a rotating shaft, and the reversing chute is rotatably connected to the furnace top support structure through the rotating shaft; one end of the connecting rod is fixedly connected to the rotating shaft.

[0007] In some embodiments, the detector is an encoder, and the encoder is fixedly installed on the furnace top support structure and sleeved on the rotating shaft.

[0008] In some embodiments, the blast furnace blanking angle control mechanism further includes an extreme impact ruler and two proximity switches. The extreme impact ruler is installed on the reversing chute, the two proximity switches are installed on the furnace top support structure at intervals, the extreme impact ruler is located between the two proximity switches, and the proximity switches are electrically connected to the control device.

[0009] In some embodiments, the hydraulic system further includes a first oil inlet pipeline, a first oil return pipeline and a two-way balance valve. The first oil inlet pipeline is communicated with the oil inlet of the three-position four-way electromagnetic proportional reversing valve and the hydraulic cylinder, the first oil return pipeline is communicated with the oil return of the three-position four-way electromagnetic proportional reversing valve and the hydraulic cylinder, and the two-way balance valve is installed on the first oil inlet pipeline and the first oil return pipeline.

[0010] In some embodiments, the hydraulic system further includes a main pressure oil supply pipeline, a main oil return pipeline and an oil tank. The main pressure oil supply pipeline and the main oil return pipeline are both connected to the three-position four-way electromagnetic proportional reversing valve and the oil tank.

[0011] In some embodiments, the hydraulic system further includes a filter, two high-pressure ball valves and two one-way valves; the two high-pressure ball valves are respectively installed on the first oil inlet pipeline and the first oil return pipeline, both located between the two-way balance valve and the hydraulic cylinder; the two one-way valves are respectively installed on the main pressure oil supply pipeline and the main oil return pipeline, and the filter is installed on the main pressure oil supply pipeline.

[0012] In some embodiments, the axis of the piston rod of the hydraulic cylinder has an included angle with the length direction of the connecting rod.

[0013] In a second aspect, an embodiment of the present application further provides a blast furnace blanking system, including a furnace top support structure, a first bin, a second bin, a weighing hopper support and the blast furnace blanking angle control mechanism provided in the first aspect above;

[0014] The first bin and the second bin are arranged side by side; the furnace top support structure is located above the first bin and the second bin;

[0015] The weighing hopper support is located below the first bin and the second bin, and the first bin and the second bin are installed on the weighing hopper support;

[0016] The reversing chute of the blast furnace blanking angle control mechanism is rotatably connected to the furnace top support structure.

[0017] In some embodiments, the blast furnace burden feeding system further includes a funnel and a conveyor belt. The funnel is located below the weighing hopper support, and the conveyor belt is used to convey the burden materials. The discharge port of the conveyor belt is located directly above the reversing chute.

[0018] The utility model has at least the following beneficial effects:

[0019] The blast furnace blanking angle control mechanism of the present application controls the movement of the piston rod of the hydraulic cylinder through a three-position four-way electromagnetic proportional reversing valve, and a detector for detecting the rotation angle of the reversing chute is added to the blast furnace blanking angle control mechanism. After such a design, the detector monitors the angle of the reversing chute in real time, and the control device controls the action of the three-position four-way electromagnetic proportional reversing valve, so that the reversing chute can stop at a variety of different inclination angles. Furthermore, the burden materials can scour different points of the wear-resistant lining of the weighing hopper support of the blast furnace burden feeding system, so that all parts of the wear-resistant lining of the weighing hopper support are evenly scoured, avoiding single-point scouring of the burden materials, which helps to extend the service life of the wear-resistant lining of the weighing hopper support and ensure the production efficiency of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Shows a schematic structural diagram of the blast furnace burden feeding system in one or more embodiments of the present application.

[0022] Figure 2 Shows a schematic structural diagram of the blast furnace blanking angle control mechanism after hiding the hydraulic system in one or more embodiments of the present application.

[0023] Figure 3 Shows a schematic structural diagram of the connection between the hydraulic system of the blast furnace blanking angle control mechanism and the hydraulic cylinder in one or more embodiments of the present application.

[0024] Reference numerals: 100 - Blast furnace burden feeding system, 110 - Top support structure, 111 - Cylinder support, 120 - First bunker, 130 - Second bunker, 140 - Weighing hopper support, 141 - Wear-resistant lining of weighing hopper support, 150 - Blast furnace charging angle control mechanism, 151 - Reversing chute, 1511 - Rotating shaft, 152 - Connecting rod, 153 - Hydraulic cylinder, 154 - Hydraulic system, 1541 - Three-position four-way electromagnetic proportional reversing valve, 1542 - First oil inlet pipeline, 1543 - First oil return pipeline, 1544 - Two-way balance valve, 1545 - High-pressure ball valve, 1546 - Main pressure oil supply pipeline, 1547 - Main oil return pipeline, 1548 - Oil tank, 1549 - Check valve, 1550 - Filter, 155 - Detector, 156 - Limit striker, 157 - Proximity switch, 160 - Hopper, 170 - Conveyor belt, 175 - Upper sealing valve, 180 - Lower sealing valve. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0027] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] The ores, coke, and miscellaneous ores required for blast furnace smelting are stored separately in the raw material bins according to their types. The ores, miscellaneous ores, and coke are screened according to the specified weights according to the blast furnace charging system, and the required raw fuels are transported to the furnace top through belts N2 and N1 in the charging order. The raw materials are loaded into the hopper by the belt through the furnace top bin and the reversing chute; after each batch of ore (coke) is loaded, the upper sealing valve and the relief valve are closed, and the equalizing valve is opened to press the hopper to the same pressure as the furnace. When the material level in the furnace drops to the specified level, the sounding rod is lifted to the original position, and the lower sealing valve is opened; the distributing chute is started at the cloth angle and number of circles required by the shift foreman, and the material is evenly distributed in the furnace by controlling the opening of the material flow regulating valve. After the material is emptied, the lower sealing valve is closed, the recovery valve is opened to drain the pressure in the hopper, and then the upper sealing valve is opened to reload the material, and at the same time the sounding rod is lowered to monitor the depth of the material level.

[0030] The applicant has found that in the related art, the positions of the left and right flips of the reversing chute are always the same, and the furnace charge has been flushing a point on the wear-resistant lining of the weighing hopper support of the blast furnace charging system for a long time, resulting in serious wear of the wear-resistant lining of the weighing hopper support.

[0031] After the wear-resistant lining of the weighing hopper support is severely worn, the only solution is to replace the new weighing hopper support (the wear-resistant lining at this part cannot be replaced during daily maintenance. It can only be replaced by the manufacturer after removing the weighing hopper support). During daily maintenance, the severely worn wear-resistant lining is repaired by welding and reinforcement. Successively, combined with environmental protection production restrictions, the No. 1 blast furnace was shut down for 37 days to replace the furnace top weighing hopper support of the No. 1 blast furnace. During the maintenance of the No. 3 blast furnace on a certain day, it was found that the ash accumulation at the west lower seal was relatively serious. Subsequently, the material flow regulating valve was opened for inspection and it was found that the wear-resistant lining of the weighing hopper support was severely worn, and the wear-resistant lining and the valve plate of the material flow regulating valve could not be normally sealed, resulting in material leakage. Subsequently, the operation of welding square iron abrasive was carried out, and nearly 100 pieces of square iron abrasive were welded. Four welders used two sets of welding tools for 360 minutes, seriously affecting the production efficiency of the enterprise. At this time, the replacement of the weighing hopper support of the No. 3 blast furnace has to be put on the agenda.

[0032] Therefore, how to ensure a long service life of the blast furnace top equipment under the working conditions of high-load production has become an urgent problem that needs to be tackled.

[0033] In summary, in the related art, there is a technical problem that the wear-resistant lining of the weighing hopper support has serious local wear, resulting in a short service life of the wear-resistant lining. The embodiments of the present application provide a blast furnace charging angle control mechanism and a blast furnace charging system, which can at least solve the technical problem of the short service life of the wear-resistant lining of the weighing hopper support to a certain extent.

[0034] The present application will be described below with reference to the accompanying drawings and specific embodiments:

[0035] As Figure 1 、 Figure 2 and Figure 3 shown, in some embodiments, the blast furnace charging angle control mechanism 150 includes a reversing chute 151, a connecting rod 152, a hydraulic cylinder 153, a hydraulic system 154, a detector 155 and a control device; the hydraulic system 154 includes a three-position four-way electromagnetic proportional reversing valve 1541, and the three-position four-way electromagnetic proportional reversing valve 1541 is connected to the hydraulic cylinder 153 for controlling the movement of the piston rod of the hydraulic cylinder 153; the reversing chute 151 is used for rotatably connecting with the top support structure 110 of the blast furnace charging system 100, one end of the connecting rod 152 is fixedly connected to the reversing chute 151, the other end of the connecting rod 152 is rotatably connected to the piston rod of the hydraulic cylinder 153, and the cylinder block of the hydraulic cylinder 153 is used for rotatably connecting with the top support structure 110 of the blast furnace charging system 100; the detector 155 is used for detecting the rotation angle of the reversing chute 151, and the control device is electrically connected to both the three-position four-way electromagnetic proportional reversing valve 1541 and the detector 155.

[0036] Specifically, the blast furnace charging system 100 further includes a top support mechanism 110, a first bin 120, a second bin 130 and a weighing hopper support 140, etc. During use, a conveyor belt 170 for transporting furnace materials and other mechanisms are further provided on the top support mechanism 110. The furnace materials are transported to directly above the reversing chute 151 through the conveyor belt 170, and then the furnace materials fall from the conveyor belt 170 and land on the reversing chute 151. Under the guiding action of the reversing chute 151, the furnace materials are transported into the first bin 120 or the second bin 130. Specifically, when the reversing chute 151 is inclined towards the first bin 120, the furnace materials fall into the first bin 120, and when the reversing chute 151 is inclined towards the second bin 130 (i.e., the inclined state shown in Figure 2 ), the furnace materials fall into the second bin 130.

[0037] As is known to those skilled in the art, upper sealing valves 175 are provided above both the first material tank 120 and the second material tank 130. When adding materials to the first material tank 120, the upper sealing valve 175 of the first material tank 120 needs to be opened so that the furnace charge can fall into the first material tank 120; when adding materials to the second material tank 130, the upper sealing valve 175 of the second material tank 130 needs to be opened so that the furnace charge can fall into the second material tank 130. Two lower sealing valves 180 are provided at the lower part of the weighing hopper support 140, one of the lower sealing valves 180 is located below the first material tank 120, and the other lower sealing valve 180 is located below the second material tank 130. The weighing hopper support 140, the first material tank 120, the upper sealing valve 175 of the first material tank 120, and the lower sealing valve 180 below the first material tank 120 enclose a material storage cavity; similarly, the weighing hopper support 140, the second material tank 130, the upper sealing valve 175 of the second material tank 130, and the lower sealing valve 180 below the second material tank 130 enclose a material storage cavity.

[0038] The reversing chute 151 is rotatably connected to the furnace top support structure 110 so that the reversing chute 151 can rotate to align with the feed inlet above the first material tank 120 or the second material tank 130, so that the furnace charge can fall into the first material tank 120 or the second material tank 130. One end of the connecting rod 152 is fixedly connected to the reversing chute 151 and the other end is rotatably connected to the piston rod of the hydraulic cylinder 153, and the cylinder body of the hydraulic cylinder 153 is rotatably connected to the furnace top support structure 110. In this way, when the piston rod of the hydraulic cylinder 153 extends or retracts, the piston rod can drive the reversing chute 151 to rotate so that the reversing chute 151 can align with the first material tank 120 or the second material tank 130.

[0039] In this solution, the reversing valve in the hydraulic system 154 uses a three-position four-way electromagnetic proportional reversing valve 1541. The spool of the three-position four-way electromagnetic proportional reversing valve 1541 has three positions, namely the first working position, the second working position, and the middle position. When in the first working position, under the action of the hydraulic system 154, the piston rod of the hydraulic cylinder 153 extends; when in the second working position, under the action of the hydraulic system 154, the piston rod of the hydraulic cylinder 153 retracts; when in the middle position, the piston rod of the hydraulic cylinder 153 remains stationary. The specific structure of the three-position four-way electromagnetic proportional reversing valve 1541 is known to those skilled in the art, and the specific installation of the three-position four-way reversing valve is also known to those skilled in the art, so it will not be elaborated here.

[0040] The detector 155 is used to detect the rotation angle of the reversing chute 151 and transmit the detected angle information to the control device. The detector 155 and the three-position four-way electromagnetic proportional reversing valve 1541 are both electrically connected to the control device. In this way, when the control device receives a specific command for the reversing chute 151 to rotate to a certain angle, the control device can control the valve core of the three-position four-way electromagnetic proportional reversing valve 1541 to switch to the first working position or the second working position, so that the hydraulic cylinder 153 extends or retracts, thereby causing the reversing chute 151 to rotate toward the specified angle. When the detector 155 detects that the reversing chute 151 reaches the specified angle, the control device controls the valve core of the three-position four-way electromagnetic proportional reversing valve 1541 to switch to the middle position, so that the piston rod of the hydraulic cylinder 153 remains stationary, thereby causing the reversing chute 151 to remain at the specified angle.

[0041] The three-position four-way electromagnetic proportional reversing valve 1541 can accurately control the flow rate of the fluid, thereby meeting the precise control of the telescopic length of the hydraulic rod, and further can more accurately control the inclination angle of the reversing chute 151, so that the reversing chute 151 can stop and remain stationary at different inclination angles, so that the charge falling from the reversing chute 151 can flush different points of the wear-resistant lining 141 of the weighing bucket bracket, so that all parts of the wear-resistant lining 141 of the weighing bucket bracket can be flushed evenly, avoiding single-point flushing of the charge, thereby helping to improve the service life of the wear-resistant lining 141 of the weighing bucket bracket and ensure the production efficiency of the enterprise.

[0042] The electrical connection method between the detector 155 and the control device, as well as the electrical connection method between the three-position four-way electromagnetic proportional reversing valve 1541 and the control device, are related to the specific structure of the detector 155, the control device and the three-position four-way electromagnetic proportional reversing valve 1541, and are not limited in the present application. Those skilled in the art are aware of the specific electrical connection relationship in combination with the specific structure of the detector 155, the control device and the three-position four-way electromagnetic proportional reversing valve 1541, and are not limited here.

[0043] In some embodiments, the reversing chute 151 has a rotating shaft 1511 , and the reversing chute 151 is rotatably connected to the furnace top supporting structure 110 via the rotating shaft 1511 ; one end of the connecting rod 152 is fixedly connected to the rotating shaft 1511 .

[0044] After such design, under the action of the hydraulic cylinder 153, the hydraulic cylinder 153 drives the rotation, and then drives the reversing chute 151 to rotate as a whole, so that the reversing chute 151 can be aligned with the feed port of the first material tank 120 or the feed port of the second material tank 130.

[0045] The structure of the detector 155 is diverse, such as an optoelectronic angle sensor, an optoelectronic distance sensor, etc. In some embodiments, the detector 155 is an encoder, and the encoder is fixedly installed on the furnace top support structure 110 and sleeved on the rotating shaft 1511.

[0046] The encoder is fixedly installed on the furnace top support structure 110. When the reversing chute 151 rotates, the encoder remains stationary, and the rotating shaft 1511 will rotate relative to the encoder. Thus, the encoder can detect the rotation angle of the rotating shaft 1511.

[0047] To improve the safety of the blast furnace material dropping angle control mechanism 150, the blast furnace material dropping angle control mechanism 150 further includes an extreme impact ruler 156 and two proximity switches 157. The extreme impact ruler 156 is installed on the reversing chute 151, and the two proximity switches 157 are installed on the furnace top support structure 110 at intervals. The extreme impact ruler 156 is located between the two proximity switches 157, and the proximity switches 157 are electrically connected to the control device.

[0048] When the extreme impact ruler 156 moves close to or contacts the proximity switch 157, it will trigger the proximity switch 157 to send an electrical signal to the control device, and the control device can control the reversing chute 151 to stop rotating or rotate in the opposite direction to prevent the reversing chute 151 from rotating too much and hitting components such as the furnace top support structure 110, causing damage to the reversing chute 151.

[0049] When installing the proximity switches 157, the positions of the two proximity switches 157 should correspond to the positions where the extreme impact ruler 156 moves to the two extremes respectively, so as to ensure that when the reversing chute 151 rotates clockwise to the extreme position, the extreme impact ruler 156 can trigger one of the proximity switches 157, and when the reversing chute 151 rotates counterclockwise to the extreme position, the extreme impact ruler 156 can trigger the proximity switch on the other side.

[0050] After such a design, when the encoder is damaged and cannot detect or accurately detect the rotation angle of the reversing chute 151, before the reversing chute 151 is about to exceed the extreme position and hit components such as the furnace top support structure 110, it can be sensed by the extreme impact ruler 156 and the proximity switch 157, so that the proximity switch 157 sends an electrical signal to the control device, and the control device controls the position of the spool of the three-position four-way electromagnetic proportional reversing valve 1541 to make the reversing chute 151 stop rotating or rotate in the opposite direction to prevent the reversing chute 151 from rotating too much and hitting components such as the furnace top support structure 110, thereby improving the safety of the blast furnace material dropping angle control mechanism 150.

[0051] Such as Figure 3As shown, in some embodiments, the hydraulic system 154 further includes a first oil inlet pipeline 1542, a first oil return pipeline 1543, and a two-way balance valve 1544. The first oil inlet pipeline 1542 is connected to the oil inlet of the three-position four-way electromagnetic proportional reversing valve 1541 and the hydraulic cylinder 153. The first oil return pipeline 1543 is connected to the oil return port of the three-position four-way electromagnetic proportional reversing valve 1541 and the hydraulic cylinder 153. The two-way balance valve 1544 is installed on the first oil inlet pipeline 1542 and the first oil return pipeline 1543.

[0052] As Figure 3 shown, when the piston rod extends, the hydraulic oil enters the hydraulic cylinder 153 through the first oil inlet pipeline 1542, and the oil in the hydraulic cylinder 153 flows out through the first oil return pipeline 1543; when the piston rod shortens, the hydraulic oil enters the hydraulic cylinder 153 through the first oil return pipeline 1543, and the oil in the hydraulic cylinder 153 flows out through the first oil inlet pipeline 1542.

[0053] For the specific structure of the two-way balance valve 1544 and its specific connection relationship with the first oil inlet pipeline 1542 and the first oil return pipeline 1543, reference can be made to Figure 3 shown. It should be noted that in combination with Figure 3 those skilled in the art can already clearly know the specific connection relationship of the first oil inlet pipeline 1542, the first oil return pipeline 1543, the two-way balance valve 1544, and the hydraulic cylinder 153, and the specific installation structure of the two-way balance valve 1544 and the like are well known to those skilled in the art, so no further elaboration will be made here.

[0054] The hydraulic system 154 adopts a two-way balance valve 1544. The two-way balance valve 1544 can only be opened under certain hydraulic conditions. Therefore, a certain back pressure can be formed in the hydraulic circuit, locking the hydraulic circuit, enabling the piston rod of the hydraulic cylinder 153 to stay at different positions more accurately, and helping to improve the stability of the reversing chute 151 to maintain a specified inclination angle.

[0055] In some embodiments, the hydraulic system 154 further includes a main pressure oil supply pipeline 1546, a main oil return pipeline 1547, and an oil tank 1548. Both the main pressure oil supply pipeline 1546 and the main oil return pipeline 1547 are connected to the three-position four-way electromagnetic proportional reversing valve 1541 and the oil tank 1548.

[0056] The oil tank 1548 is used to store hydraulic oil. When the hydraulic system 154 works, the main pressure oil supply pipeline 1546 draws hydraulic oil from the oil tank 1548, and the main oil return pipeline 1547 injects hydraulic oil into the oil tank 1548. In some embodiments, a hydraulic pump is installed on the main pressure oil supply pipeline 1546 to draw hydraulic oil from the oil tank 1548.

[0057] In some embodiments, the hydraulic system 154 further includes a filter 1550, two high-pressure ball valves 1545, and two check valves 1549; the two high-pressure ball valves 1545 are respectively installed on the first oil inlet pipeline 1542 and the first oil return pipeline 1543, both located between the two-way balance valve 1544 and the hydraulic cylinder 153; the two check valves 1549 are respectively installed on the main pressure oil supply pipeline 1546 and the main oil return pipeline 1547, and the filter 1550 is installed on the main pressure oil supply pipeline 1546.

[0058] The filter 1550 filters impurities in the hydraulic oil to prevent the impurities from clogging the pipelines or various valves on the pipelines. The check valve 1549 on the main pressure oil supply pipeline 1546 prevents the hydraulic oil in the main pressure oil supply pipeline 1546 from flowing back into the fuel tank 1548. The check valve 1549 in the main oil return pipeline 1547 prevents the hydraulic oil in the fuel tank 1548 from flowing back into the main oil return pipeline 1547.

[0059] The following is an introduction Figure 3 to the working principle of the shown hydraulic system 154:

[0060] When the telescopic rod of the hydraulic cylinder 153 extends, the hydraulic pump on the main pressure oil supply pipeline 1546 is turned on, and the three-position four-way electromagnetic proportional reversing valve 1541 is adjusted to the first working position, so that the main pressure oil supply pipeline 1546 is connected to the first oil inlet pipeline 1542, and the main oil return pipeline 1547 is connected to the first oil return pipeline 1543. At this time, the hydraulic oil in the fuel tank 1548 is injected into the rodless cavity of the hydraulic cylinder 153 through the main pressure oil supply pipeline 1546 and the first oil inlet pipeline 1542, and the hydraulic oil in the rod cavity flows back into the fuel tank 1548 through the first oil return pipeline 1543 and the main oil return pipeline 1547, and the piston rod extends.

[0061] When the telescopic rod of the hydraulic cylinder 153 shortens, the hydraulic pump on the main pressure oil supply pipeline 1546 is turned on, and the three-position four-way electromagnetic proportional reversing valve 1541 is adjusted to the second working position, so that the main pressure oil supply pipeline 1546 is connected to the first oil return pipeline 1543, and the main oil return pipeline 1547 is connected to the first oil inlet pipeline 1542. At this time, the hydraulic oil in the fuel tank 1548 is injected into the rod cavity of the hydraulic cylinder 153 through the main pressure oil supply pipeline 1546 and the first oil return pipeline 1543, and the hydraulic oil in the rodless cavity flows back into the fuel tank 1548 through the first oil inlet pipeline 1542 and the main oil return pipeline 1547, and the piston rod shortens.

[0062] When the telescopic rod of the hydraulic cylinder 153 stops telescoping, the three-position four-way electromagnetic proportional reversing valve 1541 is adjusted to the second working position, so that the main pressure oil supply pipeline 1546 is communicated with the main oil return pipeline 1547. At this time, the hydraulic oil in the fuel tank 1548 flows back to the fuel tank 1548 through the communication between the main pressure oil supply pipeline 1546 and the main oil return pipeline 1547. The telescopic rod stops telescoping and remains stationary.

[0063] In the related art, the hydraulic cylinder 153 is usually arranged vertically. After the mechanical limit of the reversing chute 151 is worn, deformed, and out of position during operation, the piston rod of the hydraulic cylinder 153 will be collinear with the length direction of the connecting rod 152, reaching the dead point position, resulting in the jamming of the reversing chute 151.

[0064] In some embodiments, the axis of the piston rod of the hydraulic cylinder 153 has an included angle with the length direction of the connecting rod 152.

[0065] That is to say, during the entire movement process of the hydraulic cylinder 153 driving the reversing chute 151, the axis of the piston rod of the hydraulic cylinder 153 and the length direction of the connecting rod 152 both have an included angle and cannot be set at a flat angle. Having an included angle can be set at an obtuse angle, an acute angle, or a right angle, but cannot be set at a flat angle.

[0066] That is to say, during the entire movement process of the hydraulic cylinder 153 driving the reversing chute 151, the piston rod of the hydraulic cylinder 153 and the length direction of the connecting rod 152 will not be collinear. When the axis of the piston rod of the hydraulic cylinder 153 and the length direction of the connecting rod 152 are set at a flat angle, the piston rod of the hydraulic cylinder 153 and the connecting rod 152 are jammed. After such a design in this application, it can avoid the jamming of the piston rod of the hydraulic cylinder 153 and the connecting rod 152, ensuring the continuous and stable operation of the blast furnace blanking angle control mechanism 150.

[0067] In some embodiments, the furnace top support structure 110 has an oil cylinder bracket 111, and the cylinder block of the hydraulic cylinder 153 is rotatably connected to the oil cylinder bracket 111. The structure of the oil cylinder bracket 111 is diverse and is not limited in this application.

[0068] Based on the same inventive concept, the embodiment of the present application also provides a blast furnace blanking system 100. The blast furnace blanking system 100 includes a furnace top support structure 110, a first charging hopper 120, a second charging hopper 130, a weighing hopper bracket 140, and the above-mentioned blast furnace blanking angle control mechanism 150; the first charging hopper 120 and the second charging hopper 130 are arranged side by side; the furnace top support structure 110 is located above the first charging hopper 120 and the second charging hopper 130; the weighing hopper bracket 140 is located below the first charging hopper 120 and the second charging hopper 130, and the first charging hopper 120 and the second charging hopper 130 are installed on the weighing hopper bracket 140; the reversing chute 151 of the blast furnace blanking angle control mechanism 150 is rotatably connected to the furnace top support structure 110.

[0069] Specifically, upper sealing valves 175 are provided above both the first material tank 120 and the second material tank 130. When adding materials to the first material tank 120, the upper sealing valve 175 of the first material tank 120 needs to be opened so that the furnace materials can fall into the first material tank 120; when adding materials to the second material tank 130, the upper sealing valve 175 of the second material tank 130 needs to be opened so that the furnace materials can fall into the second material tank 130. Two lower sealing valves 180 are provided at the lower part of the weighing hopper support 140, one of the lower sealing valves 180 is located below the first material tank 120, and the other lower sealing valve 180 is located below the second material tank 130. The weighing hopper support 140, the first material tank 120, the upper sealing valve 175 of the first material tank 120, and the lower sealing valve 180 below the first material tank 120 enclose a storage cavity; similarly, the weighing hopper support 140, the second material tank 130, the upper sealing valve 175 of the second material tank 130, and the lower sealing valve 180 below the second material tank 130 enclose a storage cavity.

[0070] The top support structure 110 is located above the first material tank 120 and the second material tank 130, and can be fixedly connected to the first material tank 120 and the second material tank 130, or can be fixedly connected to other support components.

[0071] Since the blast furnace feeding system includes the blast furnace material dropping angle control mechanism 150 of the present application, it naturally has all the beneficial effects of the blast furnace material dropping angle control mechanism 150 of the present application, which will not be elaborated here.

[0072] In some embodiments, the blast furnace feeding system 100 further includes a funnel 160 and a conveyor belt 170. The funnel 160 is located below the weighing hopper support 140, and the conveyor belt 170 is used to convey furnace materials. The discharge port of the conveyor belt 170 is located directly above the reversing chute 151.

[0073] The discharge port of the conveyor belt 170 is located directly above the reversing chute 151 so that the furnace materials dropped from the discharge port of the conveyor belt 170 can fall on the reversing chute 151. After such a design, the furnace materials are conveyed by the conveyor belt 170 to directly above the reversing chute 151, and then the furnace materials fall from the conveyor belt 170 and land on the reversing chute 151. Under the guiding action of the reversing chute 151, the furnace materials are conveyed into the first material tank 120 or the second material tank 130. Specifically, when the reversing chute 151 is inclined towards the first material tank 120, the furnace materials fall into the first material tank 120, and when the reversing chute 151 is inclined towards the second material tank 130 (i.e., Figure 2 the inclined state shown), the furnace materials fall into the second material tank 130. When discharging materials, the lower sealing valve 180 on the weighing hopper support 140 is opened, and the furnace materials can fall on the funnel 160 and be converged through the funnel 160 and conveyed into the blast furnace, facilitating the addition of furnace materials into the blast furnace.

[0074] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0075] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0076] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. A blast furnace blanking angle control mechanism (150), characterized in that: The invention comprises a reversing chute (151), a connecting rod (152), a hydraulic cylinder (153), a hydraulic system (154), a detector (155) and a control device; the hydraulic system (154) comprises a three-position four-way electromagnetic proportional reversing valve (1541); the three-position four-way electromagnetic proportional reversing valve (1541) is connected to the hydraulic cylinder (153) and is used to control the movement of the piston rod of the hydraulic cylinder (153); the reversing chute (151) is used to be rotatably connected to the furnace top support structure (110) of the blast furnace unloading system (100) One end of the connecting rod (152) is fixedly connected to the reversing chute (151), and the other end of the connecting rod (152) is rotatably connected to the piston rod of the hydraulic cylinder (153); the cylinder body of the hydraulic cylinder (153) is used to be rotatably connected to the furnace top support structure (110) of the blast furnace unloading system (100); the detector (155) is used to detect the rotation angle of the reversing chute (151), and the control device is electrically connected to the three-position four-way electromagnetic proportional reversing valve (1541) and the detector (155).

2. The blast furnace blanking angle control mechanism (150) according to claim 1, characterized in that: The reversing chute (151) has a rotating shaft (1511), and the reversing chute (151) is rotatably connected to the furnace top supporting structure (110) via the rotating shaft (1511); one end of the connecting rod (152) is fixedly connected to the rotating shaft (1511).

3. The blast furnace blanking angle control mechanism (150) according to claim 2, characterized in that: The detector (155) is an encoder, which is fixedly mounted on the furnace top support structure (110) and sleeved on the rotating shaft (1511).

4. The blast furnace blanking angle control mechanism (150) according to claim 1, characterized in that: The blast furnace drop angle control mechanism (150) further comprises a limit impact ruler (156) and two proximity switches (157), wherein the limit impact ruler (156) is installed on the reversing chute (151), and the two proximity switches (157) are installed at intervals on the furnace top support structure (110), wherein the limit impact ruler (156) is located between the two proximity switches (157), and the proximity switches (157) are electrically connected to the control device.

5. The blast furnace blanking angle control mechanism (150) according to any one of claims 1 to 4, characterized in that: The hydraulic system (154) further comprises a first oil inlet pipeline (1542), a first oil return pipeline (1543) and a two-way balancing valve (1544); the first oil inlet pipeline (1542) is connected to the three-position four-way electromagnetic proportional directional valve (1541) and the oil inlet of the hydraulic cylinder (153); the first oil return pipeline (1543) is connected to the three-position four-way electromagnetic proportional directional valve (1541) and the oil return of the hydraulic cylinder (153); and the two-way balancing valve (1544) is installed on the first oil inlet pipeline (1542) and the first oil return pipeline (1543).

6. The blast furnace blanking angle control mechanism (150) according to claim 5, characterized in that: The hydraulic system (154) further comprises a main pressure oil supply pipeline (1546), a main oil return pipeline (1547) and an oil tank (1548), wherein the main pressure oil supply pipeline (1546) and the main oil return pipeline (1547) are both connected to the three-position four-way electromagnetic proportional reversing valve (1541) and the oil tank (1548).

7. The blast furnace drop angle control mechanism (150) according to claim 6, characterized in that: The hydraulic system (154) further comprises a filter (1550), two high-pressure ball valves (1545) and two one-way valves (1549); the two high-pressure ball valves (1545) are respectively installed on the first oil inlet pipeline (1542) and the first oil return pipeline (1543), and are both located between the two-way balance valve (1544) and the hydraulic cylinder (153); the two one-way valves (1549) are respectively installed on the main pressure oil supply pipeline (1546) and the main oil return pipeline (1547), and the filter (1550) is installed on the main pressure oil supply pipeline (1546).

8. The blast furnace blanking angle control mechanism (150) according to any one of claims 1 to 4, characterized in that: The axis of the piston rod of the hydraulic cylinder (153) and the length direction of the connecting rod (152) form an angle.

9. A blast furnace unloading system (100), characterized in that: It comprises a furnace roof support structure (110), a first material tank (120), a second material tank (130), a weighing bucket support (140), and a blast furnace drop angle control mechanism (150) according to any one of claims 1 to 8; The first material tank (120) and the second material tank (130) are arranged side by side; the furnace top support structure (110) is located above the first material tank (120) and the second material tank (130); The weighing bucket bracket (140) is located below the first material tank (120) and the second material tank (130), and the first material tank (120) and the second material tank (130) are installed on the weighing bucket bracket (140); The reversing chute (151) of the blast furnace material dropping angle control mechanism (150) is rotatably connected to the furnace top support structure (110).

10. The blast furnace unloading system (100) according to claim 9, characterized in that: The blast furnace unloading system (100) further comprises a hopper (160) and a conveyor belt (170), wherein the hopper (160) is located below the weighing bucket support (140), and the conveyor belt (170) is used to transport furnace charge, and the discharge port of the conveyor belt (170) is located directly above the reversing chute (151).

Images