Long telescopic soot blower flue sealing device capable of automatically pressing

Abstract

The invention relates to a long telescopic soot blower flue sealing device capable of automatically pressing. The sealing device is directly mounted on an outer pipe of a soot blower. When the soot blower blows soot, the outer pipe penetrates into the flue in the axial direction. The friction force between the outer pipe and the filler drives the filler to move in the same direction, the filler cannot advance continuously after being blocked by the wall face of the flue, but the outer pipe of the soot blower still moves forwards, and the filler is pressed under the combined action of the friction force and the wall face pressure in the opposite direction. Meanwhile, the filler pressing device fixed to the outer pipe moves along with the outer pipe, pressure is gradually applied to the filler, and the filler can still be kept in a pressed and sealed state after the outer pipe stops advancing. The soot blower sealing device is simple in structure and convenient to disassemble and assemble, and does not conflict with an original sealing device of a soot blower in the installation position. The dynamic sealing device can be independently used, the sealing performance between the soot blower and the flue can be enhanced on the basis of an existing dynamic sealing device, and the dynamic sealing device has various application scenes.

Description

Technical Field

[0001] The invention belongs to the technical field of flue sealing of steam soot blowers for coal-fired boilers, and provides a flue sealing device for a long telescopic soot blower capable of automatically pressing, so as to prevent smoke in the flue from leaking out. The invention is particularly suitable for a flue sealing device when a long telescopic steam soot blower with an outer diameter of a soot blower outer tube (5) of 120 mm is inserted deep into the flue. Background Art

[0002] Considering the movement characteristics of the long telescopic steam sootblower used for soot cleaning of the flue of coal-fired boilers during the sootblowing process, the gap sealing device between the outer tube of the sootblower and the flue wall is generally designed as a dynamic seal. The more common dynamic sealing method at present is to fill high-pressure air into the connection between the outer tube of the sootblower and the flue wall to balance the pressure on both sides of the wall and reduce the amount of air leaking into the negative pressure flue. This dynamic sealing method can effectively reduce the leakage, but its sealing performance is still poor compared with static sealing.

[0003] The present invention is a long telescopic sootblower flue sealing device that can be automatically compressed. The sealing device is directly mounted on the outer tube of the sootblower and is fixed by the sliding track of the outer tube of the sootblower. When the sootblower is blowing soot, the outer tube goes deep into the flue along the axial direction. The friction between the outer tube and the filler drives the filler to move in the same direction. The filler cannot continue to move forward after being blocked by the flue wall, but the outer tube of the sootblower is still moving forward. The filler is compressed under the combined action of friction and the wall pressure in the opposite direction. At the same time, the filler compression device fixed on the outer tube also moves with the outer tube, gradually applies pressure to the filler, and enables the filler to remain in a compressed state after the outer tube stops moving forward. The present invention has a simple structure, is easy to disassemble and assemble, has low cost, and does not conflict with the original sealing device of the sootblower in terms of installation position. The present invention can be used independently, and can also enhance the sealing performance between the sootblower and the flue on the basis of the existing dynamic sealing device. It has various application scenarios and is flexible to use. Summary of the invention

[0004] The long telescopic sootblower furnace wall sealing device comprises an outer sealing ring 1, an inner sealing ring 2, a filler 3, a filler pressing device 4, a sootblower outer tube 5, a sootblower slide rail 6, and a flue wall 7; the outer sealing ring 1 comprises a right outer sealing ring 101, a left outer sealing ring 102, an outer sealing ring fixing bolt 103, an outer sealing ring fixing nut 104, a fixing frame fastening bolt 105, and a fixing frame fastening nut 106; the inner sealing ring 2 comprises a right inner sealing ring 201, a left inner sealing ring 202, an inner sealing ring fixing bolt 203, and an inner sealing ring fixing nut 204; the filler pressing device 4 comprises a filler pressing ring 401, a spring 402, and a fixing ring 403; the right outer sealing ring 101 comprises a right outer ring body 1011, a right outer ring The upper fixing rib 1012, the lower fixing rib 1013 of the right outer ring, the upper fixing threaded hole 1014 of the right outer ring, the lower fixing threaded hole 1015 of the right outer ring, the front fixing frame 1016 of the right outer ring, the rear fixing frame 1017 of the right outer ring, the front fixing frame threaded hole 1018 of the right outer ring, and the rear fixing frame threaded hole 1019 of the right outer ring; the left outer sealing ring 102 includes a left outer ring body 1021, the upper fixing rib 1022 of the left outer ring, the lower fixing rib 1023 of the left outer ring, the upper fixing threaded hole 1024 of the left outer ring, the lower fixing threaded hole 1025 of the left outer ring, the front fixing frame 1026 of the left outer ring, the rear fixing frame 1027 of the left outer ring, the front fixing frame threaded hole 1028 of the left outer ring, and the rear fixing frame threaded hole 1029 of the left ring; the right inner sealing ring 201 includes a right Inner ring body 2011, fixed rib 2012 on right inner ring, fixed rib 2013 on right inner ring, fixed threaded hole 2014 on right inner ring, fixed threaded hole 2015 on right inner ring; the left inner sealing ring 202 includes left inner ring body 2021, fixed rib 2022 on left inner ring, fixed rib 2023 on left inner ring, fixed threaded hole 2024 on left inner ring, fixed threaded hole 2025 on left inner ring; the fixed rib 1012 on right outer ring, fixed rib 1013 on right outer ring, fixed rib 1022 on left outer ring, fixed rib 1023 on left outer ring are exactly the same; the fixed threaded hole 1014 on right outer ring, fixed threaded hole 1015 on right outer ring, fixed threaded hole 1024 on left outer ring, fixed threaded hole 1025 on left outer ring 25 are exactly the same; the upper fixing rib 2012 of the right inner ring, the lower fixing rib 2013 of the right inner ring, the upper fixing rib 2022 of the left inner ring, and the lower fixing rib 2023 of the left inner ring are exactly the same; the upper fixing threaded hole 2014 of the right inner ring, the lower fixing threaded hole 2015 of the right inner ring, the upper fixing threaded hole 2024 of the left inner ring, and the lower fixing threaded hole 2025 of the left inner ring are exactly the same; the front fixing frame 1016 of the right outer ring and the rear fixing frame 1017 of the right outer ring are exactly the same; the front fixing frame 1026 of the left outer ring and the rear fixing frame 1027 of the left outer ring are exactly the same; the front fixing frame 1016 of the right outer ring and the front fixing frame 1026 of the left outer ring are symmetrical to each other; the rear fixing frame 1017 of the right outer ring and the rear fixing frame 1027 of the left outer ring are symmetrical to each other;The inner surface of the packing 3 and the outer surface of the sootblower outer tube 5 are transitionally matched, and the central axes of the packing 3 and the sootblower outer tube 5 coincide with each other; the inner sealing ring 2 is installed outside the packing 3, the inner sealing ring 2 covers the packing 3 inside, and the central axes of the inner sealing ring 2 and the packing 3 coincide with each other; the axial length of the inner sealing ring 2 is the same as that of the packing 3; the inner sealing ring 2 and the packing 3 are clearance matched in the radial direction; the outer sealing ring 1 is installed outside the inner sealing ring 2, the outer sealing ring 1 covers the inner sealing ring 2 inside, and the central axes of the outer sealing ring 1 and the inner sealing ring 2 coincide with each other; the axial length of the outer sealing ring 1 is slightly larger than that of the inner sealing ring 2; the outer sealing ring 1 and the inner sealing ring 2 are clearance matched in the radial direction; the outer sealing ring 1 is fixed on the sootblower slide rail 6, and one end of the outer sealing ring 1 in the axial direction is close to the flue wall 7; the packing pressing device 4 is installed on the sootblower outer tube 5, and the packing pressing device 4 and the central axes of the sootblower outer tube 5 coincide with each other. ;

[0005] The outer sealing ring 1 is composed of a right outer sealing ring 101 and a left outer sealing ring 102, and the right outer sealing ring 101 is symmetrically installed with the left outer sealing ring 102; the right outer ring body 1011 of the right outer sealing ring 101 is shaped like a half hollow cylinder cut along the axial direction; above the right outer ring body 1011, a right outer ring upper fixing rib 1012 is welded axially at the outer surface with the largest diameter; below the right outer ring body 1011, a right outer ring lower fixing rib 1013 is welded axially at the outer surface with the largest diameter; on the right outer ring upper fixing rib 1012, four right outer ring upper fixing threaded holes 1014 are opened at equal intervals along the axial direction of the right outer ring body 1011; on the right outer ring lower fixing rib 1013, four right outer ring lower fixing screw holes 1014 are opened at equal intervals along the axial direction of the right outer ring body 1011 The right outer ring body 1011 is provided with a right outer ring front fixing frame 1016 welded to the position close to the flue wall 7, and a right outer ring rear fixing frame 1017 welded to the position away from the flue wall 7; the distance between the right outer ring front fixing frame 1016 and the end of the right outer sealing ring 101 close to the flue wall 7 is equal to the distance between the right outer ring rear fixing frame 1017 and the end of the right outer sealing ring 101 away from the flue wall 7; a right outer ring front fixing frame threaded hole 1018 is provided on the right outer ring front fixing frame 1016, and a right outer ring rear fixing frame 1017 is welded to the position close to the flue wall 7. A right outer ring rear fixing frame threaded hole 1019 is provided on the frame 1017; the position of the right outer ring front fixing frame threaded hole 1018 on the right outer ring front fixing frame 1016 is exactly the same as the position of the right outer ring rear fixing frame threaded hole 1019 on the right outer ring rear fixing frame 1017; the left outer ring body 1021 of the left outer sealing ring 102 is shaped like half a hollow cylinder cut along the axial direction; above the left outer ring body 1021, a left outer ring upper fixing rib 1022 is welded axially at the outer surface with the largest diameter; below the left outer ring body 1021, a left outer ring lower fixing rib 1023 is welded axially at the outer surface with the largest diameter; on the left outer ring upper fixing rib 1022, four left outer ring upper fixing threaded holes 102 are provided at equal intervals along the axial direction of the left outer ring body 1021. 4; On the left outer ring lower fixing rib 1023, four left outer ring lower fixing threaded holes 1025 are provided at equal intervals along the axial direction of the left outer ring body 1021; The positions of the left outer ring upper fixing threaded holes 1024 provided on the left outer ring upper fixing rib 1022 are exactly the same as the positions of the left outer ring lower fixing threaded holes 1025 provided on the left outer ring lower fixing rib 1023; Above the left outer ring body 1021, a left outer ring front fixing frame 1026 is welded and connected at a position close to the flue wall surface 7, and a left ring rear fixing frame 1027 is welded and connected at a position away from the flue wall surface 7; The distance between the left outer ring front fixing frame 1026 and the end of the left outer sealing ring 101 close to the flue wall surface 7 is equal to the distance between the left ring rear fixing frame 1027 and the end of the left outer sealing ring 101 away from the flue wall surface 7;A left outer ring front fixing frame threaded hole 1028 is formed on the left outer ring front fixing frame 1026, and a left ring rear fixing frame threaded hole 1029 is formed on the left ring rear fixing frame 1027; the position of the left outer ring front fixing frame threaded hole 1028 on the left outer ring front fixing frame 1026 is exactly the same as the position of the left ring rear fixing frame threaded hole 1029 on the left ring rear fixing frame 1027; four outer sealing ring fixing bolts 103 pass through the four right outer ring upper fixing threaded holes 1014 and the four left outer ring upper fixing ribs 1012, respectively. The four left outer ring upper fixing threaded holes 1024 opened on the fixing rib 1022 cooperate with the four outer sealing ring fixing nuts 104, so as to tightly combine the right outer ring upper fixing rib 1012 with the left outer ring upper fixing rib 1022; the four outer sealing ring fixing bolts 103 respectively pass through the four right outer ring lower fixing threaded holes 1015 opened on the right outer ring lower fixing rib 1013 and the four left outer ring lower fixing threaded holes 1025 opened on the left outer ring lower fixing rib 1023, and cooperate with the four outer sealing ring fixing nuts 104, so as to fix the right outer ring lower fixing rib 1012 with the left outer ring upper fixing rib 1022. The fixing rib 1013 is tightly combined with the lower fixing rib 1023 of the left outer ring; thereby, the right outer sealing ring 101 and the left outer sealing ring 102 are tightly combined, and the right outer sealing ring 101 and the left outer sealing ring 102 are completely aligned along the length direction; a fixing frame fastening bolt 105 passes through the right outer ring front fixing frame threaded hole 1018 and the left outer ring front fixing frame threaded hole 1028, and cooperates with the fixing frame fastening nut 106, thereby tightly combining the right outer ring front fixing frame 1016 and the left outer ring front fixing frame 1026; a fixing frame The fastening bolt 105 passes through the threaded hole 1019 of the right outer ring rear fixing frame and the threaded hole 1029 of the left ring rear fixing frame, and cooperates with the fixing frame fastening nut 106, so as to tightly combine the right outer ring rear fixing frame 1017 with the left outer ring front fixing frame 1027; the closed structure composed of the right outer ring front fixing frame 1016 and the left outer ring front fixing frame 1026 and the closed structure composed of the right outer ring rear fixing frame 1017 and the left outer ring front fixing frame 1027 surround the sootblower slide rail 6, and then fix the outer sealing ring 101 on the sootblower slide rail 6.;

[0006] The inner sealing ring 2 comprises a right inner sealing ring 201 and a left inner sealing ring 202; the right inner sealing ring 201 and the left inner sealing ring 202 are symmetrically installed; the right inner ring body 2011 of the right inner sealing ring 201 is shaped like a half hollow cylinder cut along the axial direction; above the right inner ring body 2011, a right inner ring upper fixing rib 2012 is welded axially at the outer surface with the largest diameter; below the right inner ring body 2011, a right inner ring lower fixing rib 2013 is welded axially at the outer surface with the largest diameter; on the right inner ring upper fixing rib 2012, four right inner ring upper fixing threaded holes 2014 are provided at equal intervals along the axial direction of the right inner ring body 2011; on the right inner ring lower fixing rib 2013, along the right inner ring body Four right inner ring lower fixing threaded holes 2015 are provided at equidistant axial intervals on the right inner ring 2011; the positions of the right inner ring upper fixing threaded holes 2014 provided on the right inner ring upper fixing rib 2012 and the positions of the right inner ring lower fixing threaded holes 2015 provided on the right inner ring lower fixing rib 2013 are exactly the same; the left inner ring body 2021 of the left inner sealing ring 202 is shaped like a half hollow cylinder cut along the axial direction; above the left inner ring body 2021, a left inner ring upper fixing rib 2022 is axially welded at the outer surface with the largest diameter; below the left inner ring body 2021, a left inner ring lower fixing rib 2023 is axially welded at the outer surface with the largest diameter; on the left inner ring upper fixing rib 2022, along the left inner ring body 2 Four left inner ring upper fixing threaded holes 2024 are provided on the axial direction of the left inner ring body 2021 at equal intervals; four left inner ring lower fixing threaded holes 2025 are provided on the left inner ring lower fixing rib 2023 at equal intervals along the axial direction of the left inner ring body 2021; the positions of the left inner ring upper fixing threaded holes 2024 provided on the left inner ring upper fixing rib 2022 and the positions of the left inner ring lower fixing threaded holes 2025 provided on the left inner ring lower fixing rib 2023 are exactly the same; four inner sealing ring fixing bolts 203 respectively pass through the four right inner ring upper fixing threaded holes 2014 provided on the right inner ring upper fixing rib 2012 and the four left inner ring upper fixing threaded holes 2024 provided on the left inner ring upper fixing rib 2022, and are fixed with the four inner sealing rings The four inner sealing ring fixing bolts 203 respectively pass through the four right inner ring lower fixing threaded holes 2015 opened on the right inner ring lower fixing rib 2013 and the four left inner ring lower fixing threaded holes 2025 opened on the left inner ring lower fixing rib 2023, and cooperate with the four inner sealing ring fixing nuts 204, so as to tightly combine the right inner ring lower fixing rib 2013 with the left inner ring lower fixing rib 2023; and then tightly combine the right inner sealing ring 201 and the left inner sealing ring 202, and make the right inner sealing ring 201 and the left inner sealing ring 202 completely aligned along the length direction.

[0007] The packing pressing device 4 includes a packing pressing ring 401, a spring 402, and a fixing ring 403; the packing pressing ring 401 and the fixing ring 403 are installed on the sootblower outer tube 5, and the central axes of the packing pressing ring 401, the fixing ring 403, and the sootblower outer tube 5 coincide with each other; the packing pressing ring 401 and the sootblower outer tube 5 are clearance-fitted; the fixing ring 403 and the sootblower outer tube 5 are interference-fitted; one end of the packing pressing ring 401 is in contact with the packing 3, and the other end is based on the central axis of the packing pressing ring 401, and a spring 402 is installed every 60°; one end of the spring 402 is connected to the packing pressing ring 401, and the other end is connected to the fixing ring 403; so that the packing pressing ring 401 and the fixing ring 403 are connected through six springs 402.

[0008] The long telescopic sootblower flue sealing device is suitable for a long telescopic steam sootblower for cleaning the flue of a coal-fired boiler, and is particularly suitable for a long telescopic steam sootblower with an outer diameter of a sootblower outer tube 5 of 120 mm.

[0009] Instruction Manual

[0010] Figure 1 A side cross-sectional view of the long telescopic sootblower flue sealing device capable of automatically pressing;

[0011] Figure 2 An isometric view of an outer sealing ring of the long telescopic sootblower flue sealing device capable of automatically tightening;

[0012] Figure 3 A right side view of the right outer sealing ring of the outer sealing ring of the long telescopic sootblower flue sealing device capable of automatically tightening;

[0013] Figure 4 A left side view of the left outer sealing ring of the outer sealing ring of the long telescopic sootblower flue sealing device capable of automatically tightening;

[0014] Figure 5 An isometric view of an inner sealing ring of the long telescopic sootblower flue sealing device capable of automatically tightening;

[0015] Figure 6 A right side view of the right inner sealing ring of the inner sealing ring of the long telescopic sootblower flue sealing device capable of automatically tightening;

[0016] Figure 7 A left side view of the left inner sealing ring of the inner sealing ring of the long telescopic sootblower flue sealing device capable of automatically tightening;

[0017] Figure 8 An isometric view of a packing pressing device of a long telescopic sootblower flue sealing device capable of automatically pressing;

[0018] Fig. 9 An isometric view of the packing of the long telescopic sootblower flue sealing device capable of automatically tightening;

[0019] Fig.10 It is an isometric drawing of the long telescopic sootblower flue sealing device capable of automatically tightening after being assembled. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] like Figures 1 to 10As shown, the outer tube 5 of the sootblower passes through the flue wall 7 and enters the flue; the central axes of the packing 3 and the outer tube 5 of the sootblower coincide with each other; the inner surface of the packing 3 and the outer surface of the outer tube 5 of the sootblower are transitionally matched, so that the packing 3 can be conveniently removed and replaced when the sealing device is inspected and repaired, and a certain friction force can be generated between the packing 3 and the outer tube 5 of the sootblower when the sootblower is working, so that the packing 3 moves with the outer tube 5 of the sootblower; the inner sealing ring 2 is installed outside the packing 3, and the inner sealing ring 2 covers the packing 3 inside, and the central axes of the inner sealing ring 2 and the packing 3 coincide with each other; the inner sealing ring 2 is composed of a right inner sealing ring 201 and a left inner sealing ring 202, and eight inner sealing rings are passed between the right inner sealing ring 201 and the left inner sealing ring 202. The fixing bolts 203 are connected with the eight inner sealing ring fixing nuts 204; when the packing 3 needs to be replaced, the right inner sealing ring 201 and the left inner sealing ring 202 can be separated by removing the eight inner sealing ring fixing bolts 203 and the eight inner sealing ring fixing nuts 204, so as to open the inner sealing ring 2; the axial length of the inner sealing ring 2 is the same as that of the packing 3; the inner sealing ring 2 and the packing 3 are clearance-matched in the radial direction, so as to leave a space margin for the radial deformation of the packing 3 after being squeezed by the packing pressing device 4 and the flue wall 7; the outer sealing ring 1 is installed outside the inner sealing ring 2, the outer sealing ring 1 covers the inner sealing ring 2 inside, and the central axes of the outer sealing ring 1 and the inner sealing ring 2 coincide with each other; the axial length of the outer sealing ring 1 is slightly The outer tube 5 of the soot blower rotates around the axis during soot blowing. Due to the manufacturing process, the uneven mass distribution of the outer tube 5 of the soot blower will cause eccentric vibration, thereby driving the packing 3 to move radially, resulting in radial displacement of the inner seal ring 2. A radial movable space needs to be reserved between the outer seal ring 1 and the inner seal ring 2. The outer seal ring 1 is composed of a right outer seal ring 101 and a left outer seal ring 2. 102; the right outer sealing ring 101 and the left outer sealing ring 102 are connected by eight outer sealing ring fixing bolts 103 and eight outer sealing ring fixing nuts 104; the right outer ring front fixing frame 1016 and the right outer ring rear fixing frame 1017 are installed on the right outer sealing ring 101; the left outer ring front fixing frame 1026 and the left outer ring rear fixing frame 1027 are installed on the left outer sealing ring 102; the right outer ring front fixing frame 1016 and the left outer ring front fixing frame 1026 are connected by a fixing frame fastening bolt 105 and a fixing frame fastening nut 106; the right outer ring rear fixing frame 1017 and the left outer ring rear fixing frame 1027 are connected by a fixing frame fastening bolt 105 and a fixing frame fastening nut 106;The two annular spaces formed by the right outer ring front fixing frame 1016 and the left outer ring front fixing frame 1026, the right outer ring rear fixing frame 1017 and the left outer ring rear fixing frame 1027 frame the sootblower slide rail 6, so that the outer sealing ring 1 is fixed on the sootblower slide rail 6; when the sealing device needs to be repaired, the right outer ring can be separated by removing the eight outer sealing ring fixing bolts 103, the eight outer sealing ring fixing nuts 104, the two fixing frame fastening bolts 105, and the two fixing frame fastening nuts 106. The sealing ring 101 and the left outer sealing ring 102 are opened, thereby opening the outer sealing ring 1 and removing the outer sealing ring 1 from the sootblower slide rail 6; the packing pressing device 4 is installed on the sootblower outer tube 5, and the central axes of the packing pressing device 4 and the sootblower outer tube 5 coincide with each other; there is a clearance fit between the packing pressing ring 401 and the sootblower outer tube 5, so that the packing pressing ring 401 can slide along the sootblower outer tube 5; there is an interference fit between the fixing ring 403 and the sootblower outer tube 5, so that the fixing ring 403 is tightly fixed on the outer tube 5 of the sootblower and can move with the outer tube 5 of the sootblower; one end of the packing clamping ring 401 is in contact with the packing 3, and the other end is based on the central axis of the packing clamping ring 401, and a spring 402 is installed every 60°; one end of the spring 402 is connected to the packing clamping ring 401, and the other end is connected to the fixing ring 403; so that the packing clamping ring 401 and the fixing ring 403 are connected through six springs 402, and the movement of the fixing ring 403 can be transmitted to the packing clamping ring 401 through the six springs 402, and act on the packing 3; when the sootblower is working, the fixing ring 403 will move axially at a faster speed with the outer tube 5 of the sootblower, and the fixing ring 403 and the packing clamping ring 401 are flexibly connected by springs 402, which can reduce the impact between the fixing ring 403 and the packing clamping ring 401 and the packing 3 and other parts, avoid sudden changes in their mechanical state, and extend their service life. ;

[0022] When the sootblower starts to work, the sootblower outer tube 5 goes deep into the flue axially along the sootblower slide rail 6, and the filler 3 moves toward the flue wall 7 together with the sootblower outer tube 5 under the action of the friction between the filler 3 and the sootblower outer tube 5; at the same time, the fixing ring 403 of the filler pressing device 4 moves forward with the sootblower outer tube 5, and transmits the movement to the filler pressing ring 402 through the spring 402, and the filler pressing ring 402 also moves forward together; when the filler 3 contacts the flue wall 7, it is hindered by the flue wall 7 and the filler 3 cannot continue to move forward, but the sootblower outer tube 5 is still moving into the flue; after the filler pressing ring 401 contacts the filler 3, it is hindered by the filler 3 and the speed is reduced; the fixing ring 403 moves along with the sootblower The outer tube 5 continues to move forward at the original speed, the distance between the packing clamping ring 401 and the fixing ring 403 decreases, the six springs 403 are gradually compressed, and the pressure is transmitted from the packing clamping ring 401 to the packing 3; the packing 3 is simultaneously subjected to the pressure from the flue wall 7, the pressure from the packing clamping device 4 and the friction force of the sootblower outer tube 5, wherein the pressure from the packing clamping device 4 is in the same direction as the friction force of the sootblower outer tube 5, and the pressure from the flue wall 7 is in the opposite direction to the friction force of the sootblower outer tube 5; the packing 3 is compressed against the flue wall 7, and its radial deformation can also fill the radial gap between the packing 3 and the inner sealing ring 2, further strengthening the seal between the sootblower outer tube 5 and the flue wall 7.

[0023] When the sootblower outer tube 5 reaches the maximum stroke and stops moving forward, although the friction between the packing 3 and the sootblower outer tube 5 disappears, since the position of the sootblower outer tube 5 does not change, the position of the fixing ring 403 on the sootblower outer tube 5 also does not change, the spring 402 continues to maintain a clamped state, and the pressure is transmitted to the packing 3 through the packing clamping ring 401, so that the packing 3 maintains a sealed state under the pressure in opposite directions from the flue wall 7 and the packing clamping device 4.

[0024] When the sootblower finishes sootblowing, the outer tube 5 of the sootblower leaves the inside of the flue, and the packing 3 is under the action of the friction between the outer tube 5 of the sootblower and the flue wall 7, and the pressure of the flue wall 7 on the packing 3 is reduced; the fixing ring 403 also moves away from the flue wall 7 as the outer tube 5 of the sootblower moves away from the flue wall 7, and the spring 403 gradually returns to its original state, and the pressure acting on the packing clamping ring 401 is reduced; as the outer tube 5 of the sootblower is reset, the pressure from the flue wall 7, the pressure from the packing clamping device 4 and the friction of the outer tube 5 of the sootblower all disappear, and the packing 3 is released from the sealing state and returns to its original state, which can avoid the packing 3 being in a high-pressure state all the time and extend its service life.

[0025] The long telescopic sootblower flue sealing device is suitable for a long telescopic steam sootblower for cleaning the flue of a coal-fired boiler; it is particularly suitable for a long telescopic steam sootblower with an outer diameter of a sootblower outer tube 5 of 120 mm; in engineering applications, the size can also be changed according to actual conditions to meet design requirements.

[0026] In summary, the present invention is a long telescopic sootblower flue sealing device that can be automatically compressed. The sealing device is directly mounted on the outer tube of the sootblower and fixed by the sliding track of the outer tube of the sootblower. When the sootblower is blowing soot, the outer tube goes deep into the flue along the axial direction. The friction between the outer tube and the filler drives the filler to move in the same direction. The filler cannot continue to move forward after being blocked by the flue wall, but the outer tube of the sootblower is still moving forward. The filler is compressed under the combined action of friction and the wall pressure in the opposite direction. At the same time, the filler compression device fixed on the outer tube also moves with the outer tube, gradually applies pressure to the filler, and enables the filler to remain in a compressed state after the outer tube stops moving forward. The present invention has a simple structure, is easy to disassemble and assemble, has low cost, and does not conflict with the original sealing device of the sootblower in terms of installation position. The present invention can be used independently, and can also enhance the sealing performance between the sootblower and the flue on the basis of the existing dynamic sealing device. It has various application scenarios and is flexible to use.

Claims

1. A long telescopic sootblower flue sealing device capable of automatically tightening, characterized in that: The long telescopic sootblower furnace wall sealing device comprises an outer sealing ring (1), an inner sealing ring (2), a filler (3), a filler pressing device (4), a sootblower outer tube (5), a sootblower slide rail (6), and a flue wall (7); the outer sealing ring (1) comprises a right outer sealing ring (101), a left outer sealing ring (102), an outer sealing ring fixing bolt (103), an outer sealing ring fixing nut (104), a fixing frame fastening bolt (105), and a fixing frame fastening nut (106); the inner sealing ring (2) comprises a right inner sealing ring (201), a left inner sealing ring (202), an inner sealing ring fixing bolt (203), and an inner sealing ring fixing nut (204); the filler pressing device (4) comprises a filler pressing ring (401), A spring (402), a fixing ring (403); the right outer sealing ring (101) comprises a right outer ring body (1011), a fixing rib (1012) on the right outer ring, a fixing rib (1013) on the right outer ring, a fixing threaded hole (1014) on the right outer ring, a fixing threaded hole (1015) on the right outer ring, a front fixing frame (1016) on the right outer ring, a rear fixing frame (1017) on the right outer ring, a threaded hole (1018) on the right outer ring, and a threaded hole (1019) on the rear fixing frame of the right outer ring; the left outer sealing ring (102) comprises a left outer ring body (1021), a fixing rib (1022) on the left outer ring, a fixing rib (1023) on the left outer ring, a fixing threaded hole (1024) on the left outer ring, and a fixing threaded hole (1025) on the left outer ring , a left outer ring front fixing frame (1026), a left outer ring rear fixing frame (1027), a left outer ring front fixing frame threaded hole (1028), and a left ring rear fixing frame threaded hole (1029); the right inner sealing ring (201) comprises a right inner ring body (2011), a right inner ring upper fixing rib (2012), a right inner ring lower fixing rib (2013), a right inner ring upper fixing threaded hole (2014), and a right inner ring lower fixing threaded hole (2015); the left inner sealing ring (202) comprises a left inner ring body (2021), a left inner ring upper fixing rib (2022), a left inner ring lower fixing rib (2023), a left inner ring upper fixing threaded hole (2024), and a left inner ring lower fixing threaded hole (2025); the right outer ring upper fixing rib (1012), The lower fixed rib (1013) of the right outer ring, the upper fixed rib (1022) of the left outer ring, and the lower fixed rib (1023) of the left outer ring are completely identical; the upper fixed threaded hole (1014) of the right outer ring, the lower fixed threaded hole (1015) of the right outer ring, the upper fixed threaded hole (1024) of the left outer ring, and the lower fixed threaded hole (1025) of the left outer ring are completely identical; the upper fixed rib (2012) of the right inner ring, the lower fixed rib (2013) of the right inner ring, the upper fixed rib (2022) of the left inner ring, and the lower fixed rib (2023) of the left inner ring are completely identical; the upper fixed threaded hole (2014) of the right inner ring, the lower fixed threaded hole (2015) of the right inner ring, the upper fixed threaded hole (2024) of the left inner ring, and the lower fixed threaded hole (2025) of the left inner ring are completely identical;The right outer ring front fixing frame (1016) and the right outer ring rear fixing frame (1017) are completely identical; the left outer ring front fixing frame (1026) and the left outer ring rear fixing frame (1027) are completely identical; the right outer ring front fixing frame (1016) and the left outer ring front fixing frame (1026) are symmetrical to each other; the right outer ring rear fixing frame (1017) and the left outer ring rear fixing frame (1027) are symmetrical to each other; the inner surface of the packing (3) and the outer surface of the soot blower outer tube (5) are transitionally matched, and the central axes of the packing (3) and the soot blower outer tube (5) coincide with each other; the inner sealing ring (2) is installed outside the packing (3), the inner sealing ring (2) covers the packing (3) inside, and the central axes of the inner sealing ring (2) and the packing (3) coincide with each other; the inner sealing ring (2) has the same axial length as the packing (3); the inner sealing ring (2) and the packing (3) are clearance-matched in the radial direction; the outer sealing ring (1) is installed outside the inner sealing ring (2), the outer sealing ring (1) covers the inner sealing ring (2), and the central axes of the outer sealing ring (1) and the inner sealing ring (2) are mutually coincident; the axial length of the outer sealing ring (1) is slightly greater than that of the inner sealing ring (2); the outer sealing ring (1) and the inner sealing ring (2) are clearance-matched in the radial direction; the outer sealing ring (1) is fixed on the sootblower slide rail (6), and one end of the outer sealing ring (1) is in close contact with the flue wall (7); the packing pressing device (4) is installed on the sootblower outer tube (5), and the central axes of the packing pressing device (4) and the sootblower outer tube (5) are mutually coincident. ; 2. The long telescopic sootblower flue sealing device capable of automatically tightening according to claim 1, characterized in that: The outer sealing ring (1) is composed of a right outer sealing ring (101) and a left outer sealing ring (102), and the right outer sealing ring (101) and the left outer sealing ring (102) are symmetrically installed; the right outer ring body (1011) of the right outer sealing ring (101) is shaped like a half hollow cylinder cut along the axial direction; above the right outer ring body (1011), a right outer ring upper fixing rib (1012) is welded along the axial direction at the outer surface connected to the symmetry plane; below the right outer ring body (1011), a right outer ring lower fixing rib (1013) is welded along the axial direction at the outer surface connected to the symmetry plane; on the right outer ring upper fixing rib (1012), four right outer ring upper fixing threaded holes (1014) are provided at equal intervals along the axial direction of the right outer ring body (1011); Four right outer ring lower fixing threaded holes (1015) are provided at equal intervals along the axial direction of the right outer ring body (1011) on the lower fixing rib (1013) of the ring; the positions of the right outer ring upper fixing threaded holes (1014) provided on the right outer ring upper fixing rib (1012) are exactly the same as the positions of the right outer ring lower fixing threaded holes (1015) provided on the right outer ring lower fixing rib (1013); a right outer ring front fixing frame (1016) is welded and connected at a position close to the flue wall surface (7) above the right outer ring body (1011), and a right outer ring rear fixing frame (1017) is welded and connected at a position away from the flue wall surface (7); the distance between the right outer ring front fixing frame (1016) and one end of the right outer sealing ring (101) close to the flue wall surface (7) is the same as the distance between the right outer ring rear fixing frame (1017) and the right outer ring front fixing frame (1016). The right outer ring (1017) and the right outer sealing ring (101) are at an equal distance from one end of the flue wall (7); a right outer ring front fixing frame threaded hole (1018) is provided on the right outer ring front fixing frame (1016), and a right outer ring rear fixing frame threaded hole (1019) is provided on the right outer ring rear fixing frame (1017); the position of the right outer ring front fixing frame threaded hole (1018) on the right outer ring front fixing frame (1016) is exactly the same as the position of the right outer ring rear fixing frame threaded hole (1019) on the right outer ring rear fixing frame (1017); the left outer ring body (1021) of the left outer sealing ring (102) is shaped as half of a hollow cylinder cut along the axial direction; above the left outer ring body (1021), the outer surface connected to the symmetry plane is A left outer ring upper fixing rib (1022) is axially welded; a left outer ring lower fixing rib (1023) is axially welded at the outer surface connected to the symmetry plane below the left outer ring body (1021); four left outer ring upper fixing threaded holes (1024) are evenly spaced along the axial direction of the left outer ring body (1021) on the left outer ring upper fixing rib (1022); four left outer ring lower fixing threaded holes (1025) are evenly spaced along the axial direction of the left outer ring body (1021) on the left outer ring lower fixing rib (1023); the positions of the left outer ring upper fixing threaded holes (1024) on the left outer ring upper fixing rib (1022) and the positions of the left outer ring lower fixing threaded holes (1025) on the left outer ring lower fixing rib (1023) are exactly the same;A left outer ring front fixing frame (1026) is welded and connected to a position close to the flue wall (7) above the left outer ring body (1021), and a left ring rear fixing frame (1027) is welded and connected to a position away from the flue wall (7); the distance between the left outer ring front fixing frame (1026) and the end of the left outer sealing ring (101) close to the flue wall (7) is equal to the distance between the left ring rear fixing frame (1027) and the end of the left outer sealing ring (101) away from the flue wall (7); a left outer ring front fixing frame threaded hole (1028) is formed on the left outer ring front fixing frame (1026), and a left ring rear fixing frame threaded hole (1029) is formed on the left ring rear fixing frame (1027); the left outer ring front fixing frame threaded hole (1028) is provided on the left outer ring rear fixing frame (1027); ) on the left outer ring front fixing frame (1026) is exactly the same as the position of the left ring rear fixing frame threaded hole (1029) on the left ring rear fixing frame (1027); four outer sealing ring fixing bolts (103) respectively pass through the four right outer ring fixing threaded holes (1014) opened on the right outer ring upper fixing rib (1012) and the four left outer ring fixing threaded holes (1024) opened on the left outer ring upper fixing rib (1022), and cooperate with the four outer sealing ring fixing nuts (104), so as to tightly combine the right outer ring upper fixing rib (1012) and the left outer ring upper fixing rib (1022); the four outer sealing ring fixing bolts (103) respectively pass through the four right outer ring fixing threads opened on the right outer ring lower fixing rib (1013) The right outer ring lower fixing threaded hole (1015) and the four left outer ring lower fixing threaded holes (1025) opened on the left outer ring lower fixing rib (1023) cooperate with four outer sealing ring fixing nuts (104), thereby tightly combining the right outer ring lower fixing rib (1013) with the left outer ring lower fixing rib (1023); tightly combining the right outer sealing ring (101) and the left outer sealing ring (102), and making the right outer sealing ring (101) and the left outer sealing ring (102) completely aligned along the length direction; a fixing frame fastening bolt (105) passes through the right outer ring front fixing frame threaded hole (1018) and the left outer ring front fixing frame threaded hole (1028), and cooperates with the fixing frame fastening nut (106), thereby fixing the right outer ring front fixing frame The fixing frame (1016) is tightly combined with the left outer ring front fixing frame (1026); a fixing frame fastening bolt (105) passes through the right outer ring rear fixing frame threaded hole (1019) and the left ring rear fixing frame threaded hole (1029), and cooperates with the fixing frame fastening nut (106), so that the right outer ring rear fixing frame (1017) and the left outer ring front fixing frame (1027) are tightly combined; the closed structure composed of the right outer ring front fixing frame (1016) and the left outer ring front fixing frame (1026) and the closed structure composed of the right outer ring rear fixing frame (1017) and the left outer ring front fixing frame (1027) surround the soot blower slide rail (6), thereby fixing the outer sealing ring (101) on the soot blower slide rail (6). ; 3. The long telescopic sootblower flue sealing device capable of automatically pressing according to claim 1, characterized in that: The inner sealing ring (2) comprises a right inner sealing ring (201) and a left inner sealing ring (202); the right inner sealing ring (201) and the left inner sealing ring (202) are symmetrically installed; the right inner ring body (2011) of the right inner sealing ring (201) is shaped like a half hollow cylinder cut along the axial direction; above the right inner ring body (2011), a right inner ring upper fixing rib (212) is welded along the axial direction at the outer surface connected to the symmetry plane; below the right inner ring body (2011), a right inner ring lower fixing rib (213) is welded along the axial direction at the outer surface connected to the symmetry plane; on the right inner ring upper fixing rib (2012), four right inner ring upper fixing threaded holes (2014) are provided at equal intervals along the axial direction of the right inner ring body (2011) ; On the right inner ring lower fixing rib (2013), four right inner ring lower fixing threaded holes (2015) are provided at equal intervals along the axial direction of the right inner ring body (2011); the positions of the right inner ring upper fixing threaded holes (214) provided on the right inner ring upper fixing rib (212) are exactly the same as the positions of the right inner ring lower fixing threaded holes (215) provided on the right inner ring lower fixing rib (213); the left inner ring body (2021) of the left inner sealing ring (202) is shaped as half of a hollow cylinder cut along the axial direction; above the left inner ring body (2021), a left inner ring upper fixing rib (2022) is welded along the axial direction on the outer surface connected to the symmetry plane; below the left inner ring body (2021), a left inner ring upper fixing rib (2022) is welded along the axial direction on the outer surface connected to the symmetry plane; A left inner ring lower fixing rib (2023) is welded to the left inner ring; four left inner ring upper fixing threaded holes (2024) are provided on the left inner ring upper fixing rib (2022) at equal intervals along the axial direction of the left inner ring body (2021); four left inner ring lower fixing threaded holes (2025) are provided on the left inner ring lower fixing rib (2023) at equal intervals along the axial direction of the left inner ring body (2021); the positions of the left inner ring upper fixing threaded holes (2024) provided on the left inner ring upper fixing rib (2022) and the positions of the left inner ring lower fixing threaded holes (2025) provided on the left inner ring lower fixing rib (2023) are exactly the same; four inner sealing ring fixing bolts (203) are respectively passed through the four right inner ring upper fixing holes provided on the right inner ring upper fixing rib (2012); The fixed threaded hole (2014) and the four left inner ring upper fixed threaded holes (2024) opened on the left inner ring upper fixed rib (2022) cooperate with the four inner sealing ring fixing nuts (204) to tightly combine the right inner ring upper fixed rib (2012) with the left inner ring upper fixed rib (2022); the four inner sealing ring fixing bolts (203) respectively pass through the four right inner ring lower fixed threaded holes (2015) opened on the right inner ring lower fixed rib (2013) and the four left inner ring lower fixed threaded holes (2025) opened on the left inner ring lower fixed rib (2023), and cooperate with the four inner sealing ring fixing nuts (204) to tightly combine the right inner ring lower fixed rib (2013) with the left inner ring lower fixed rib (2023);The right inner sealing ring (201) and the left inner sealing ring (202) are tightly combined, and the right inner sealing ring (201) and the left inner sealing ring (202) are completely aligned along the length direction. ; 4. The long telescopic sootblower flue sealing device capable of automatically tightening according to claim 1, characterized in that: The packing pressing device (4) comprises a packing pressing ring (401), a spring (402), and a fixing ring (403); the packing pressing ring (401) and the fixing ring (403) are installed on the outer tube (5) of the soot blower, and the central axes of the packing pressing ring (401), the fixing ring (403), and the outer tube (5) of the soot blower coincide with each other; there is a clearance fit between the packing pressing ring (401) and the outer tube (5) of the soot blower; the fixing ring (403) and the soot blower The outer tubes (5) are in interference fit; one end of the packing clamping ring (401) is in contact with the packing (3), and the other end is based on the central axis of the packing clamping ring (401), and a spring (402) is installed every 60 degrees; one end of the spring (402) is connected to the packing clamping ring (401), and the other end is connected to the fixing ring (403); thus, the packing clamping ring (401) and the fixing ring (403) are connected through the six springs (402).

5. The long telescopic sootblower flue sealing device capable of automatically pressing according to claim 1, characterized in that: The long telescopic sootblower flue sealing device is suitable for a long telescopic steam sootblower for cleaning the flue of a coal-fired boiler; in particular, it is suitable for a long telescopic steam sootblower with an outer diameter of a sootblower outer tube (5) of 120 mm.

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