Blast furnace top gas blow-off valve sealing device

Abstract

The invention relates to the technical field of gas blow-off valves, and particularly discloses a blast furnace top gas blow-off valve sealing device, the side face of a valve body is fixedly connected with a transmission part, the output end of the transmission part is fixedly connected with a valve cover, and the bottom of an inner cavity of the valve body is fixedly connected with a net plate; the top of the moving part is fixedly connected with a contact part, the top of the contact part is rotatably connected with a cleaning part, the moving part comprises a fixed shaft, the bottom of the fixed shaft is fixedly connected with the top of a net plate, and the fixed shaft is slidably connected with a moving frame. According to the blast furnace top gas blow-off valve sealing device, the moving part is arranged, the moving frame drives the scraping plate to slide in the mode of being tightly attached to the inner wall of the valve body in the moving process, smoke dust attached to the wall face is continuously scraped off, it is avoided that a large amount of smoke dust is left in the valve body when gas is discharged, and the risk that equipment is abraded and blocked due to dust accumulation is reduced; and the service life of the valve body is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of gas relief valves, in particular to a sealing device for a blast furnace top gas relief valve. Background Art

[0002] During the blast furnace production process, a certain internal pressure must be maintained. When the pressure inside the furnace is too high, the gas release valve opens to release excess gas to maintain constant pressure and prevent accidents caused by pressure fluctuations. During normal blast furnace operation, the release valve is closed, and the sealing device is crucial. It must prevent gas leakage from the blast furnace, ensuring the continuity and stability of production, while also avoiding the safety hazards and environmental pollution caused by gas leaks. Gas is a flammable, explosive, and toxic gas. Leakage into the environment poses a threat to personnel safety and pollutes the atmosphere. With the continuous improvement of safety and environmental protection standards, higher requirements are being placed on the sealing and reliability of the blast furnace top gas release valve sealing device to ensure production safety and environmental quality.

[0003] During blast furnace operation, when coal gas enters the valve body, the dust it carries with it inevitably adheres to the inner wall of the valve body. Over time, the dust continues to accumulate and tends to form aggregates on the inner side of the valve body. Furthermore, when the gas temperature drops, the alkali metal salts (such as potassium salts and sodium salts) in the dust condense and crystallize, and these crystals firmly adhere to the valve body wall. Furthermore, frequent fluctuations in blast furnace top pressure cause dust particles to squeeze each other, gradually forming hard and dense layers. These layers not only hinder the smooth flow of coal gas, but when the valve cover is closed, the dust accumulation will destroy the tight fit of the sealing surface, ultimately causing the seal to fail, resulting in coal gas leakage, bringing safety hazards and energy waste. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A blast furnace top gas release valve sealing device, comprising:

[0005] A valve body, wherein a transmission component is fixedly connected to the side of the valve body, a valve cover is fixedly connected to the output end of the transmission component, and a mesh plate is fixedly connected to the bottom of the inner cavity of the valve body;

[0006] A moving component, which is used to clean the inner side of the valve body, wherein the top of the moving component is fixedly connected to a contact component, and the top of the contact component is rotatably connected to a cleaning component;

[0007] The movable component includes a fixed shaft, the bottom of the fixed shaft is fixedly connected to the top of the mesh plate, the fixed shaft is slidably connected to a movable frame, the side of the movable frame is fixedly connected to a scraper, the side of the scraper away from the movable frame is in contact with the inner side of the valve body, the side of the scraper is evenly provided with through holes, the fixed shaft is sleeved with a first spring, the top of the first spring is fixedly connected to the bottom of the movable frame, the bottom of the first spring is fixedly connected to the top of the mesh plate, and both sides of the top of the movable frame are fixedly connected to connecting shafts;

[0008] When the blast furnace needs to relieve pressure, the valve cover opens, and the gas enters the valve body after filtering out large particles of impurities through the mesh plate, and is then quickly discharged into the atmosphere through the valve body. During this process, the high-speed airflow generated by the gas creates an upward impact force, pushing the movable frame to overcome the resistance of the first spring and move upward along the connecting shaft. During the movement, the movable frame drives the scraper to slide closely against the inner wall of the valve body, continuously scraping off the smoke and dust attached to the wall, thus avoiding a large amount of smoke and dust remaining inside the valve body when the gas is discharged, reducing the risk of equipment wear and blockage due to dust accumulation, and extending the service life of the valve body;

[0009] Preferably, the contact component includes a filter screen, the bottom of the filter screen is fixedly connected to the top of the connecting shaft, the side of the filter screen is slidably connected to the inner side of the valve body, both sides of the filter screen are provided with mounting grooves, the middle of the mounting groove is slidably connected to a sliding shaft, the other end of the sliding shaft is fixedly connected to a contact plate, a second spring is sleeved on the sliding shaft, one end of the second spring is fixedly connected to the inner side of the mounting groove, and the other end of the second spring is fixedly connected to the contact plate;

[0010] Preferably, when the movable frame is moved upward by the impact force of the gas, the filter screen will be driven to move upward synchronously through the connecting rod, thereby realizing coordinated cleaning of different positions inside the valve body and improving cleaning efficiency. When the filter screen passes through the sealing groove of the valve body, the contact plate will be separated from the mounting groove along the sliding shaft under the action of the tensile force of the second spring and move toward the sealing groove. The side surface of the contact plate will abut against the sealing groove. As the movable frame drives the filter screen to continue to move upward, the contact plate can effectively scrape off impurities such as dust and accumulated ash inside the sealing groove.

[0011] Preferably, the cleaning component includes a cleaning rod, a spiral blade is fixedly connected to the middle of the side of the cleaning rod, a grabbing mechanism is sleeved on the top of the cleaning rod, a rotating mechanism is sleeved on the bottom of the cleaning rod, and the bottom of the cleaning rod is rotatably connected to the top of the filter screen;

[0012] Preferably, in the process of gas being discharged upward through the valve body, the impact force generated when the airflow passes through the filter screen acts on the spiral blade, driving the spiral blade to rotate, and the spiral blade drives the cleaning rod to rotate synchronously on the top of the filter screen, and at the same time, the rotating mechanism is linked to clean the top of the filter screen, thereby preventing impurities carried by the gas flow from clogging the filter mesh, ensuring the air permeability of the filter screen, and improving the gas discharge efficiency. In addition, when the valve cover is slowly opened, the grabbing mechanism rotates with the cleaning rod to clean the bottom of the valve cover, and promptly removes the dust and impurities remaining on the bottom of the valve cover, providing good conditions for the subsequent sealing work when the valve cover is closed, reducing the risk of sealing failure due to residual foreign matter, and ensuring the stable operation of the blast furnace gas discharging system;

[0013] The top of the rotary rod is provided with a sliding groove, and the inner side of the sliding groove is fixedly connected to the inner side of the rotary rod, and the side surface of the slider is slidably connected to the inner side of the slide groove. A knock block is fixedly connected to the guide rod, and a third spring is provided on the guide rod, and one end of the third spring is fixedly connected to the side surface of the slider, and the other end of the third spring is fixedly connected to the inner side of the slide groove.

[0014] Preferably, when the spiral blade is driven by the impact force of the gas to drive the cleaning rod to rotate on the top of the filter, it will synchronously drive the rotating sleeve and the rotating rod to rotate. At this time, the brush installed at the bottom of the rotating sleeve will rotate accordingly to clean the surface of the filter in all directions, remove dust, particles and other impurities attached to the top of the filter, prevent the filter from being blocked, and ensure that the gas discharge channel is unobstructed. This not only improves the gas discharge efficiency, but also reduces the frequency of equipment maintenance caused by filter blockage;

[0015] Preferably, the grabbing mechanism includes a grabbing sleeve, the inner side of the grabbing sleeve is fixedly connected to the side of the cleaning rod, the side of the grabbing sleeve is fixedly connected to a grabbing rod, the number of the grabbing rods is three, and the three grabbing rods are evenly arranged with the grabbing sleeve as the center, the top of the grabbing rod is fixedly connected to a cleaning brush, the inner side of the grabbing rod is rotatably connected to a cross bar, and grabbing grooves are provided on both sides of the cross bar.

[0016] The present invention provides a sealing device for a blast furnace top gas release valve. It has the following beneficial effects:

[0017] 1. The sealing device of the blast furnace top gas release valve is provided with moving parts. During the movement, the moving frame drives the scraper to slide close to the inner wall of the valve body, continuously scraping away the smoke and dust attached to the wall, thus avoiding a large amount of smoke and dust remaining inside the valve body during gas discharge, reducing the risk of equipment wear and blockage due to dust accumulation, and extending the service life of the valve body.

[0018] 2. The sealing device of the blast furnace top gas release valve is provided with a contact component. The movable frame drives the contact component to move upward synchronously through the connecting shaft. When the valve cover is completely separated from the valve body, the contact component enters the groove of the valve body sealing surface to remove the dust accumulated in the groove, avoid dust accumulation in the sealing surface groove, and prevent gas leakage caused by uneven sealing surface, thereby improving the reliability and safety of the sealing device and ensuring the accuracy and stability of blast furnace pressure control.

[0019] 3. The sealing device of the blast furnace top gas release valve is equipped with a rotating mechanism. When the spiral blade is driven by the impact force of the gas to rotate the cleaning rod on the top of the filter, it will synchronously drive the rotating sleeve and the rotating rod to rotate. At this time, the brush installed at the bottom of the rotating sleeve will rotate accordingly to clean the surface of the filter in all directions, remove dust, particles and other impurities attached to the top of the filter, prevent the filter from being blocked, and ensure that the gas emission channel is unobstructed. This not only improves the gas emission efficiency, but also reduces the frequency of equipment maintenance caused by filter blockage.

[0020] 4. The sealing device of the blast furnace top gas release valve is provided with a grabbing mechanism. When the spiral blade is driven by the impact force of the gas to rotate the cleaning rod on the top of the filter, the grabbing sleeve and the grabbing rod are driven to rotate synchronously. At the moment the valve body is just opened, the grabbing rod drives the cleaning brush to quickly sweep across the bottom of the valve cover, which can promptly remove dust, scale and other impurities attached to the bottom of the valve cover, preventing these impurities from entering the sealing surface when the valve cover is closed, reducing the risk of sealing failure caused by slag inclusion, and ensuring the sealing and reliability of the blast furnace gas release valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a sealing device for a blast furnace top gas release valve according to the present invention;

[0022] Figure 2 Schematic diagram of the structure of the valve body of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the screen plate of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the moving parts of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the contact component of the present invention;

[0026] Figure 6It is a structural schematic diagram of the cleaning component of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the rotating mechanism of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the grabbing mechanism of the present invention.

[0029] In the figure: 1. valve body; 2. transmission part; 3. valve cover; 4. contact part; 41. filter screen; 42. mounting groove; 43. sliding shaft; 44. contact plate; 45. second spring; 5. mesh plate; 6. moving part; 61. fixed shaft; 62. moving frame; 63. scraper; 64. through hole; 65. first spring; 66. connecting shaft; 7. cleaning part; 71. cleaning rod; 72. spiral blade; 73. grabbing mechanism; 731. grabbing sleeve; 732. grabbing rod; 733. cleaning brush; 734. cross bar; 735. grabbing groove; 74. rotating mechanism; 741. rotating sleeve; 742. rotating rod; 743. brush; 744. slide groove; 745. guide rod; 746. slider; 747. knocking block; 748. third spring. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 3 The present invention provides a technical solution: a sealing device for a blast furnace top gas release valve, comprising:

[0032] The valve body 1 has a transmission component 2 fixedly connected to the side of the valve body 1, a valve cover 3 fixedly connected to the output end of the transmission component 2, and a mesh plate 5 fixedly connected to the bottom of the inner cavity of the valve body 1;

[0033] The movable component 6 is used to clean the inner side of the valve body 1. The top of the movable component 6 is fixedly connected to the contact component 4, and the top of the contact component 4 is rotatably connected to the cleaning component 7;

[0034] See also Figures 1-4The movable component 6 includes a fixed shaft 61, the bottom of the fixed shaft 61 is fixedly connected to the top of the mesh plate 5, a movable frame 62 is slidably connected to the fixed shaft 61, and a scraper 63 is fixedly connected to the side of the movable frame 62. The side of the scraper 63 away from the movable frame 62 contacts the inner side of the valve body 1, and through holes 64 are evenly opened on the side of the scraper 63. A first spring 65 is sleeved on the fixed shaft 61, and the top of the first spring 65 is fixedly connected to the bottom of the movable frame 62. The bottom of the first spring 65 is fixedly connected to the top of the mesh plate 5, and both sides of the top of the movable frame 62 are fixedly connected to connecting shafts 66;

[0035] When the blast furnace needs to release pressure, the valve cover 3 is opened, and the coal gas enters the valve body 1 after filtering large particles of impurities through the mesh plate 5, and is then quickly discharged into the atmosphere through the valve body 1. During this process, the high-speed airflow generated by the coal gas forms an upward impact force, pushing the movable frame 62 to overcome the resistance of the first spring 65 and move upward along the connecting shaft 66. During the movement, the movable frame 62 drives the scraper 63 to slide closely against the inner wall of the valve body 1, continuously scraping off the smoke and dust attached to the wall, thereby avoiding a large amount of smoke and dust remaining inside the valve body 1 when the coal gas is discharged, reducing the risk of equipment wear and blockage due to dust accumulation, and extending the service life of the valve body 1;

[0036] At the same time, the movable frame 62 drives the contact component 4 to move upward synchronously through the connecting shaft 66. When the valve cover 3 is completely separated from the valve body 1, the contact component 4 enters the groove of the sealing surface of the valve body 1 to remove the dust accumulated in the groove, thereby preventing dust from accumulating in the groove of the sealing surface and preventing gas leakage caused by uneven sealing surface, thereby improving the reliability and safety of the sealing device and ensuring the accuracy and stability of blast furnace pressure control.

[0037] See also Figure 1-Figure 5 The present invention provides a technical solution: the contact component 4 includes a filter screen 41, the bottom of the filter screen 41 is fixedly connected to the top of the connecting shaft 66, the side of the filter screen 41 is slidably connected to the inner side of the valve body 1, and mounting grooves 42 are provided on both sides of the filter screen 41. A sliding shaft 43 is slidably connected to the middle of the mounting groove 42, and the other end of the sliding shaft 43 is fixedly connected to the contact plate 44. A second spring 45 is sleeved on the sliding shaft 43, one end of the second spring 45 is fixedly connected to the inner side of the mounting groove 42, and the other end of the second spring 45 is fixedly connected to the contact plate 44;

[0038] When the movable frame 62 is moved upward by the impact force of the gas, it will drive the filter 41 to move upward synchronously through the connecting rod, thereby achieving coordinated cleaning of different positions inside the valve body 1 and improving cleaning efficiency. When the filter 41 passes through the sealing groove of the valve body 1, the contact plate 44, under the action of the tensile force of the second spring 45, separates from the mounting groove 42 along the sliding shaft 43 and moves toward the sealing groove. The side surface of the contact plate 44 abuts against the sealing groove. As the movable frame 62 drives the filter 41 to continue to move upward, the contact plate 44 can effectively scrape off dust, accumulated dust and other impurities inside the sealing groove.

[0039] Through mechanical linkage and elastic adaptive design, dust easily accumulated in the sealing groove is actively removed to prevent dust accumulation there. This can effectively prevent seal failure and gas leakage caused by slag inclusion when the valve cover 3 is closed, thereby improving the sealing reliability and stability of the blast furnace top gas release valve sealing device;

[0040] See also Figures 1-6 The present invention provides a technical solution: the cleaning component 7 includes a cleaning rod 71, a spiral blade 72 is fixedly connected to the middle part of the side of the cleaning rod 71, a grabbing mechanism 73 is sleeved on the top of the cleaning rod 71, and a rotating mechanism 74 is sleeved on the bottom of the cleaning rod 71. The bottom of the cleaning rod 71 is rotatably connected to the top of the filter screen 41;

[0041] During the process of gas discharge upward through the valve body 1, the impact force generated when the airflow passes through the filter 41 acts on the spiral blade 72, driving the spiral blade 72 to rotate. The spiral blade 72 drives the cleaning rod 71 to rotate synchronously on the top of the filter 41, and at the same time, the rotating mechanism 74 is linked to clean the top of the filter 41, thereby preventing impurities carried by the gas flow from clogging the mesh of the filter 41, ensuring the air permeability of the filter 41, and improving the gas discharge efficiency. In addition, when the valve cover 3 is slowly opened, the grabbing mechanism 73 rotates with the cleaning rod 71 to clean the bottom of the valve cover 3, promptly removing the dust and impurities remaining on the bottom of the valve cover 3, providing good conditions for the subsequent sealing work when the valve cover 3 is closed, reducing the risk of sealing failure due to residual foreign matter, and ensuring the stable operation of the blast furnace gas release system;

[0042] See also Figure 1-Figure 7The rotating mechanism 74 includes a rotating sleeve 741, the inner side of the rotating sleeve 741 is fixedly connected to the side of the cleaning rod 71, the side of the rotating sleeve 741 is fixedly connected to a rotating rod 742, the number of rotating rods 742 is three, and the three rotating rods 742 are evenly arranged with the rotating sleeve 741 as the center. The bottom of the rotating rod 742 is fixedly connected to a brush 743, and the bottom of the brush 743 contacts the top of the filter screen 41. The top of the rotating rod 742 is provided with a slide groove 744, and the inner side of the slide groove 744 is fixedly connected to a guide rod 745. The other end of the guide rod 745 is fixedly connected to the inner side of the rotating rod 742, and a slider 746 is slidably connected to the guide rod 745. The bottom of the slider 746 is slidably connected to the inner side of the rotating rod 742, and the side of the slider 746 is slidably connected to the inner side of the slide groove 744. Both sides of the slider 746 are fixedly connected to a knocking block 747. A third spring 748 is sleeved on the guide rod 745, and one end of the third spring 748 is fixedly connected to the side of the slider 746, and the other end of the third spring 748 is fixedly connected to the inner side of the slide groove 744.

[0043] When the spiral blade 72 is driven by the impact of the gas and drives the cleaning rod 71 to rotate on the top of the filter 41, it will synchronously drive the rotating sleeve 741 and the rotating rod 742 to rotate. At this time, the brush 743 installed at the bottom of the rotating sleeve 741 will also rotate, cleaning the surface of the filter 41 in all directions, removing dust, particles and other impurities attached to the top of the filter 41, preventing the filter 41 from being blocked, and ensuring that the gas discharge channel is unobstructed. This not only improves the gas discharge efficiency, but also reduces the frequency of equipment maintenance caused by filter 41 blockage.

[0044] During the rotation of the rotating sleeve 741 and the rotating rod 742, the centrifugal force causes the slider 746 to overcome the pulling force of the third spring 748, slide outward along the guide rod 745 and disengage from the inner side of the slide groove 744. As the rotating sleeve 741 continues to rotate, the knocking block 747 connected to the slider 746 continuously strikes the inner wall of the valve body 1, and at the same time disperses the impurities cleaned by the moving frame 62, the scraper 63 and other components, avoiding the accumulation of impurities on the valve body 1, reducing the risk of equipment wear caused by impurity accumulation, and preventing the valve from getting stuck due to excessive material accumulation.

[0045] See also Figures 1-8 The grabbing mechanism 73 includes a grabbing sleeve 731, the inner side of the grabbing sleeve 731 is fixedly connected to the side of the cleaning rod 71, and the side of the grabbing sleeve 731 is fixedly connected to a grabbing rod 732. There are three grabbing rods 732, and the three grabbing rods 732 are evenly arranged with the grabbing sleeve 731 as the center. The top of the grabbing rod 732 is fixedly connected to a cleaning brush 733, and the inner side of the grabbing rod 732 is rotatably connected to a cross bar 734. Both sides of the cross bar 734 are provided with grabbing grooves 735.

[0046] When the spiral blade 72 is driven by the impact force of the gas to drive the cleaning rod 71 to rotate on the top of the filter 41, the grabbing sleeve 731 and the grabbing rod 732 are synchronously driven to rotate. At the moment when the valve body 1 is just opened, the grabbing rod 732 drives the cleaning brush 733 to quickly sweep across the bottom of the valve cover 3, which can promptly remove dust, scale and other impurities attached to the bottom of the valve cover 3, preventing these impurities from entering the sealing surface when the valve cover 3 is closed, reducing the risk of sealing failure caused by slag inclusion, and ensuring the sealing and reliability of the blast furnace gas release valve;

[0047] As the grabbing rod 732 rotates, the centrifugal force causes the cross bar 734 to rotate and expand inside it. Since grabbing grooves 735 are provided on both sides of the cross bar 734, the impurities cleaned by the cleaning brush 733 will be captured by the grabbing grooves 735, preventing the fallen impurities from re-accumulating inside the valve body 1 or causing secondary pollution with the gas discharge, further improving the cleaning efficiency of the device, while reducing the wear and blockage problems caused by the accumulation of impurities inside the equipment, extending the service life of the equipment and reducing maintenance costs.

[0048] Specific workflow:

[0049] When the blast furnace is operating normally, the furnace top pressure is monitored in real time by the pressure control system. When the pressure is within the set range, the relief valve remains closed and the sealing device continues to withstand the gas pressure in the furnace;

[0050] When the furnace top pressure exceeds the set upper limit, the pressure sensor sends a signal to the PLC, which triggers the release valve opening instruction;

[0051] After receiving the instruction, the driving device starts to perform the valve cover 3 lifting action;

[0052] The driving device pulls the valve cover 3 through the rotating arm mechanism, separating the valve cover 3 from the sealing surface of the valve body 1. At this time, the soft seal recovers its deformation, the hard sealing surface breaks away from contact, the gas channel opens, and the excess gas is discharged through the vent pipe;

[0053] When the gas enters the valve body 1, it will generate a continuous upward impact force, pushing the moving part 6 to move upward. During the movement, the moving part 6 cleans the valve body 1 by scraping against the inner wall of the valve body 1 to prevent dust from accumulating on the wall of the valve body 1. At the same time, the moving part 6 drives the contact part 4 to move upward synchronously. After the valve cover 3 is opened and separated from the valve body 1, the contact part 4 can enter the sealing surface groove to remove the dust accumulated therein, thereby preventing the dust accumulation from affecting the sealing effect. When the valve body 1 and the valve cover 3 are just opened, the cleaning part 7 will clean the surface of the valve cover 3 to remove residual dust, further ensuring the normal operation of the sealing device.

[0054] When the furnace top pressure drops to the set lower limit, the pressure sensor feeds back a signal to the PLC, which then issues a command to close the relief valve.

[0055] The driving device moves in the reverse direction, pushing the valve cover 3 down slowly to the sealing surface of the valve body 1;

[0056] The soft seal first contacts the valve body 1 and fills the interface gap through elastic compression;

[0057] As the valve cover 3 continues to be pressed down, the hard sealing surfaces gradually fit together, forming a double seal of "hard support + soft filling", ensuring that the pressure on the sealing surface is evenly distributed.

[0058] Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative work should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A sealing device for a blast furnace top gas release valve, characterized in that: include: A valve body (1), a transmission component (2) is fixedly connected to the side of the valve body (1), an output end of the transmission component (2) is fixedly connected to a valve cover (3), and a mesh plate (5) is fixedly connected to the bottom of the inner cavity of the valve body (1); A moving component (6) is used to clean the inner side of the valve body (1), wherein the top of the moving component (6) is fixedly connected to the contact component (4), and the top of the contact component (4) is rotatably connected to the cleaning component (7); The movable component (6) comprises a fixed shaft (61), the bottom of the fixed shaft (61) is fixedly connected to the top of the screen plate (5), a movable frame (62) is slidably connected to the fixed shaft (61), a scraper (63) is fixedly connected to the side of the movable frame (62), and through holes (64) are evenly opened on the side of the scraper (63), a first spring (65) is sleeved on the fixed shaft (61), and connecting shafts (66) are fixedly connected to both sides of the top of the movable frame (62).

2. A blast furnace top gas relief valve sealing device according to claim 1, characterized in that: The side of the scraper (63) away from the movable frame (62) contacts the inner side of the valve body (1), the top of the first spring (65) is fixedly connected to the bottom of the movable frame (62), and the bottom of the first spring (65) is fixedly connected to the top of the mesh plate (5).

3. The sealing device for a blast furnace top gas relief valve according to claim 1, characterized in that: The contact component (4) includes a filter screen (41), and mounting grooves (42) are provided on both sides of the filter screen (41). A sliding shaft (43) is slidably connected to the middle of the mounting groove (42), and the other end of the sliding shaft (43) is fixedly connected to a contact plate (44). A second spring (45) is sleeved on the sliding shaft (43).

4. A sealing device for a blast furnace top gas release valve according to claim 3, characterized in that: The bottom of the filter screen (41) is fixedly connected to the top of the connecting shaft (66), the side of the filter screen (41) is slidably connected to the inner side of the valve body (1), one end of the second spring (45) is fixedly connected to the inner side of the mounting groove (42), and the other end of the second spring (45) is fixedly connected to the contact plate (44).

5. The sealing device for a blast furnace top gas relief valve according to claim 1, characterized in that: The cleaning component (7) comprises a cleaning rod (71), a spiral blade (72) is fixedly connected to the middle of the side of the cleaning rod (71), a grabbing mechanism (73) is sleeved on the top of the cleaning rod (71), a rotating mechanism (74) is sleeved on the bottom of the cleaning rod (71), and the bottom of the cleaning rod (71) is rotatably connected to the top of the filter screen (41).

6. The sealing device for a blast furnace top gas release valve according to claim 5, characterized in that: The rotating mechanism (74) comprises a rotating sleeve (741), a rotating rod (742) is fixedly connected to the side of the rotating sleeve (741), a brush (743) is fixedly connected to the bottom of the rotating rod (742), a sliding groove (744) is provided on the top of the rotating rod (742), a guide rod (745) is fixedly connected to the inner side of the sliding groove (744), the other end of the guide rod (745) is fixedly connected to the inner side of the rotating rod (742), a slider (746) is slidably connected to the guide rod (745), and knocking blocks (747) are fixedly connected to both sides of the slider (746), and a third spring (748) is sleeved on the guide rod (745).

7. The sealing device for a blast furnace top gas release valve according to claim 6, characterized in that: The inner side of the rotating sleeve (741) is fixedly connected to the side of the cleaning rod (71), the number of the rotating rods (742) is three, and the three rotating rods (742) are evenly arranged with the rotating sleeve (741) as the center, the bottom of the slider (746) is slidably connected to the inner side of the rotating rod (742), the side of the slider (746) is slidably connected to the inner side of the slide groove (744), one end of the third spring (748) is fixedly connected to the side of the slider (746), and the other end of the third spring (748) is fixedly connected to the inner side of the slide groove (744), and the bottom of the brush (743) is in contact with the top of the filter (41).

8. The sealing device for a blast furnace top gas relief valve according to claim 5, characterized in that: The grabbing mechanism (73) comprises a grabbing sleeve (731), a grabbing rod (732) fixedly connected to the side of the grabbing sleeve (731), a cleaning brush (733) fixedly connected to the top of the grabbing rod (732), a crossbar (734) rotatably connected to the inner side of the grabbing rod (732), and grabbing grooves (735) are provided on both sides of the crossbar (734).

9. The sealing device for a blast furnace top gas relief valve according to claim 8, characterized in that: The inner side of the grabbing sleeve (731) is fixedly connected to the side of the cleaning rod (71), and the number of the grabbing rods (732) is three, and the three grabbing rods (732) are evenly arranged with the grabbing sleeve (731) as the center.

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