Furnace top fixing device for thermal power plant boilers

Abstract

This application relates to a sealing device for furnace top and walls, and pertains to the field of thermal power generation technology. It includes a support device, with the boiler penetrating through a hole in the wall. The support device includes a fixing plate located in a mounting hole. Each end face of the fixing plate is provided with an elastic rod and a horizontal connecting assembly. The horizontal connecting assembly can move towards or away from the fixing plate and is restricted by the elastic rod. Two mutually spaced horizontal connecting assemblies are fitted with support rods at the boiler penetrating through the wall, and the remaining horizontal connecting assemblies are fitted with connecting plates at the boiler penetrating through the wall. Each end of the support rod is provided with a fixing block, the sidewall of which abuts against the wall, and the support rod can slide along the fixing block. The support rod abuts against and slides along the fixing block. A wedge-shaped strip is fixedly connected to the connecting plate and / or the support rod. Both ends of the wedge-shaped strip abut against the fixing block, one end face of which abuts against the boiler penetrating through the wall, and the other end face abuts against the wall. This application has the effect of preventing smoke and high temperatures from dispersing into the external environment.

Description

Technical Field

[0001] This application relates to the field of thermal power generation technology, and in particular to a furnace top fixing device for power generation boilers in thermal power plants. Background Technology

[0002] In the power generation field, thermal power is still a mainstream power generation method. Thermal power furnaces, as important heat carriers, usually require sealing of the gaps between the furnace top and the furnace walls. If they are not sealed or the sealing effect is poor, problems such as smoke and ash leakage will occur, causing the surrounding environment to heat up and causing certain adverse effects, which in turn affect the physical and mental health of the operators, as well as their working condition and reduce their work efficiency.

[0003] In related technologies, the sealing of boiler roofs and walls in boiler plants is generally divided into the following three structures: First, the furnace wall structure in areas without sealing devices: This involves filling the spaces between roof pipes with loose aluminum silicate refractory fiber and high-temperature adhesive, compacting and flattening it, then uniformly applying high-temperature refractory mortar, asbestos-free calcium silicate, and a special calcium silicate plaster, with galvanized wire mesh laid inside, and secured with support hooks and pressure plates. Second, the furnace wall structure in areas with metal sealing boxes: High-temperature micro-expansion refractory plastic is laid inside the metal sealing box, with a uniform layer of high-temperature refractory mortar applied to its surface, and then filled with thick loose aluminum silicate refractory fiber. The third type is the furnace wall structure in areas where pipes penetrate the roof and have metal expansion joints.

[0004] Regarding the aforementioned technologies, as the boiler unit operates, factors such as thermal displacement, high thermal alternating stress, and insufficient metal seal expansion in the boiler body's through-wall pipe area can still cause a certain degree of ash leakage, smoke leakage, and overheating at the boiler top, which can still have adverse effects on the surrounding environment and operators. Utility Model Content

[0005] In order to prevent thermal displacement from causing a gap between the through-wall pipe and the wall, which could lead to ash leakage, smoke leakage and overheating, thus affecting the working environment of the surrounding operators, this application provides a furnace top fixing device for power plant boilers.

[0006] This application provides a furnace top fixing device for power plant boilers, adopting the following technical solution:

[0007] A boiler top fixing device for a thermal power plant includes a support device, a fixing device, and a sealing device. The wall has a hole at the boiler penetration point, and the boiler penetration point passes through the hole. Each side wall of the boiler penetration point has a centrally located mounting hole. The support device includes a fixing plate located in the mounting hole. Each end face of the fixing plate has an elastic rod and a horizontal connecting assembly. The horizontal connecting assembly can move towards or away from the fixing plate and is restricted by the elastic rod. Two mutually spaced horizontal connecting assemblies are fitted with support rods at the boiler penetration point, and the remaining horizontal connecting assemblies are fitted with connecting plates at the boiler penetration point. Each support rod has a fixing block at both ends, the sidewall of which abuts against the wall, and the support rod can slide along the fixing block. The connecting plate and / or the support rod are both fixed with wedge-shaped strips. Both ends of the wedge-shaped strip abut against the fixing blocks, one end face abuts against the boiler penetration point, and the other end face abuts against the wall.

[0008] By adopting the above technical solution, each side wall of the boiler's through-wall section is equipped with an installation block, which can seal the gap between each side wall of the boiler's through-wall section and the wall. The fixing plate provides an installation base for the support device. The horizontal connecting component is connected to the fixing plate through an elastic rod. That is, the distance between the horizontal connecting component and the fixing plate can vary to a certain extent. However, due to the presence of the elastic rod, if displacement occurs and the support is lost, the horizontal connecting component will return to its original position. The fixing block is located at the corner of the hole and limits the boiler through-wall portion. At the same time, the position of the elastic rod is adjusted so that the wedge-shaped strips on the upper and lower parts of the wall tend to move towards each other in the vertical direction when they are in the gap between the boiler through-wall portion and the wall. When the boiler through-wall portion is heated and expands to a certain extent, the side wall of the boiler through-wall portion moves towards the hole and squeezes the wedge-shaped strips, causing them to move away from each other. When the boiler through-wall portion cools down, the side wall of the boiler through-wall portion moves away from the hole. At this time, the wedge-shaped strips move towards each other under the action of the elastic rod, thereby sealing the gap between the boiler through-wall portion and the hole wall. The fixing block provides a limit to the sliding direction of the wedge-shaped strips, thereby preventing ash leakage, smoke leakage and overheating, which would affect the working environment of the surrounding operators.

[0009] Optionally, a vertical connecting component is provided between the fixing plate and the horizontal connecting component. The vertical connecting component includes a fixing tube, and the horizontal connecting component is detachably connected to the elastic rod through the fixing tube. A telescopic rod and a support plate are provided at the fixing tube. The support plate slides along the fixing tube through the telescopic rod. The support plate is located in the inner cavity of the hole and fits against the wall. Both ends of the support plate abut against the fixing block, and the wedge strip abuts against the support plate.

[0010] By adopting the above technical solution, the fixing pipe can connect the horizontal connecting component and the fixing plate, allowing a certain gap between the horizontal connecting component and the wall, thus providing a range of motion for the sliding of the wedge strip. The fixing pipe and the elastic rod are detachably connected, facilitating installation by operators. The support plate is located inside the cavity of the hole, at which point the side wall of the wedge strip abuts against the support plate, preventing ash leakage, smoke leakage, and excessive heat dissipation caused by uneven hole walls.

[0011] Optionally, the support plate is covered with a first sealing gasket, the wedge strip is covered with a second sealing gasket, and the fixing block is covered with an elastic gasket, wherein the first sealing gasket, the second sealing gasket, and the elastic gasket are pressed against each other.

[0012] By adopting the above technical solution, the presence of the first sealing gasket, the second sealing gasket, and the elastic gasket can seal the gaps that exist between the support plate, the wedge strip, and the hole wall due to the unevenness of the surface during extrusion, preventing the occurrence of dust leakage, smoke leakage, and overheating. The first sealing gasket, the second sealing gasket, and the elastic gasket can further improve the sealing effect by applying pressure to each other.

[0013] Optionally, the fixing plate is provided with a mounting block, the inner cavity of the mounting block is provided with a mounting groove, the side wall of the mounting groove is provided with a vertical groove, a horizontal groove and a locking groove, and the vertical groove and the locking groove are located on the same side of the horizontal groove and are connected through the horizontal groove. The fixing tube is fixedly connected with a plug block and a spring. The plug block can enter the locking groove through the vertical groove and the horizontal groove. One end of the spring is fixedly connected to the mounting block and the other end is fixedly connected to the fixing tube.

[0014] By adopting the above technical solution, when the operator installs the fixed pipe, the plug-in block first enters through the vertical groove, then moves through the horizontal groove, and finally enters the locking groove. During this process, the spring is in a stretched state. When the plug-in block enters the locking groove, the operator releases the restriction on the fixed pipe, the spring returns to its original length, and limits the fixed pipe, locking the plug-in block in the locking groove, thereby achieving the limitation of the fixed pipe.

[0015] Optionally, the inner cavity of the fixed tube is provided with a movable rod, which can slide along the fixed tube, and the horizontal connecting assembly is rotatably connected to the movable rod.

[0016] By adopting the above technical solution, the moving rod slides along the fixed pipe, thereby adjusting the distance between the horizontal connecting assembly and the wall, and further adjusting the distance between the wedge strip and the wall, so that the wedge strip can better provide a sealing effect between the boiler through-wall part and the hole. Optionally, the horizontal connecting assembly includes a horizontal pipe and a horizontal rod. The horizontal pipe is rotatably connected to the moving rod, and the horizontal rod passes through the inner cavity of the horizontal pipe and can slide along the horizontal pipe. The support rod and / or the connecting plate are fixedly connected to the horizontal rod.

[0017] By adopting the above technical solution, the operator can first install the fixed pipe. Since the horizontal pipe and the moving rod are rotatably connected, the operator can then rotate the horizontal pipe and make the horizontal rod slide along the horizontal pipe, so that the support rod or connecting plate is as close as possible to the side wall of the hole, and then cooperate with the wedge strip to seal the boiler through-wall part.

[0018] Optionally, the device further includes an installation apparatus, which comprises an installation sleeve and an installation tube. The installation sleeve passes through the installation hole, and the side wall of the installation sleeve is provided with a countersunk hole and a receiving groove from the inside out, and the countersunk hole and the receiving groove are connected. A protrusion is provided in the countersunk hole, and a plug-in plate is provided in the receiving groove. The protrusion is fixedly connected to the plug-in plate. The installation tube passes through the inner cavity of the installation sleeve and is slidably connected to the installation sleeve. The fixing piece is located in the inner cavity of the installation tube and is fixedly connected to the installation tube.

[0019] By adopting the above technical solution, the operator first places the plug plate in the receiving groove, then places the mounting sleeve in the inner cavity of the mounting hole, and then the operator inserts the mounting tube into the inner cavity of the mounting sleeve. At this time, the outer wall of the mounting tube squeezes the protrusion, causing the protrusion to slide along the countersunk hole, and causing the abutment plate to slide away from the mounting tube and abut against the wall, providing support for the arch of the mounting sleeve.

[0020] Optionally, both ends of the mounting sleeve and the mounting tube are blade-shaped, and the outer diameter of the mounting sleeve and / or the mounting tube gradually decreases near the end.

[0021] By adopting the above technical solution, the end of the mounting sleeve is blade-shaped, which makes it easier for the operator to place the mounting sleeve into the inner cavity of the mounting hole, reducing the difficulty of installing the mounting sleeve due to the numerous burrs on the side wall of the mounting hole. The end of the mounting tube is also blade-shaped, which allows the outer wall of the mounting tube to be guided by the blade when the operator places the mounting tube into the inner cavity of the mounting sleeve, facilitating the compression of the protrusion.

[0022] Optionally, a limiting ring is fixedly connected to the inner cavity and bottom end of the mounting sleeve, and the mounting tube abuts against the limiting ring.

[0023] By adopting the above technical solution, the limiting ring is located at the bottom of the inner cavity of the mounting sleeve, which can limit the mounting tube and prevent the mounting tube from falling out of the mounting sleeve.

[0024] Optionally, the space between the two wedges is filled with high-strength fiber ceramic.

[0025] By adopting the above technical solutions, high-strength fiber ceramics are resistant to high temperatures, have low thermal conductivity, are lightweight, have good thermal stability, have low thermal expansion, are soft in texture, and have a certain compression resilience. This can improve the tightness with the wall, thereby preventing the occurrence of ash leakage, smoke leakage, and overheating, which would affect the working environment of the surrounding operators.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting up a connecting device and a sealing device, when the boiler wall-penetrating part expands due to heat, it squeezes the elastic pad and wedge strip, causing the wedge strip to move away from each other. When the temperature drops, the outer wall of the boiler wall-penetrating part shrinks to a certain extent. At this time, the wedge strip moves towards each other under the action of the elastic rod, which can still seal the gap between the boiler wall-penetrating part and the hole, preventing the occurrence of ash leakage, smoke leakage and overheating, and affecting the working environment of the surrounding operators.

[0028] 2. By setting up an installation device, operators can easily install and remove the support device, thereby improving their work efficiency;

[0029] 3. By setting high-strength fiber ceramics, the sealing gaps can be filled while the connection stability between the boiler through-wall part and the wall can be improved according to its characteristics. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the usage state structure in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 3 This is a cross-sectional structural diagram of an embodiment of this application;

[0033] Figure 4 yes Figure 3 Enlarged diagram of part A in the middle;

[0034] Figure 5 This is a cross-sectional view of the mounting block.

[0035] Reference numerals: 1. Mounting device; 11. Mounting sleeve; 111. Limiting ring; 112. Countersunk hole; 113. Connecting hole; 114. Receiving groove; 12. Locking unit; 121. Protrusion; 122. Connecting rod; 123. Insertion plate; 124. Barb; 13. Support assembly; 13. Mounting tube; 2. Supporting device; 21. Fixing piece; 22. Mounting block; 221. Mounting groove; 222. Vertical groove; 223. Horizontal groove; 224. Locking groove; 23. Elastic rod; 3. Connecting device; 31. Support block; 311. Insertion block; 32. Vertical connection 321. Connecting component; 322. Fixed pipe; 323. Moving rod; 324. Fixed ring; 325. Spring; 33. Horizontal connecting component; 331. Horizontal pipe; 332. Horizontal bar; 4. Fixing device; 41. Support rod; 42. Fixing block; 43. Elastic pad; 44. Connecting plate; 5. Sealing device; 51. Fixing component; 511. Telescopic rod; 512. Support plate; 513. First sealing gasket; 52. Wedge strip; 521. Second sealing gasket; 53. Sealing gap; 54. High-strength fiber ceramic; 6. Wall; 61. Mounting hole; 7. Boiler through-wall part. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0037] This application discloses a furnace top fixing device for power plant boilers.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The furnace top fixing device for power plant boilers includes an installation device 1, a support device 2, a connecting device 3, a fixing device 4, and a sealing device 5.

[0039] Reference Figure 1 and Figure 2 In this embodiment, the horizontal cross-section of the boiler through-wall portion 7 is rectangular, and the wall 6 has a rectangular hole that matches it. The furnace top fixing device for the power plant boiler is installed in the hole and the boiler through-wall portion 7, and can seal the gap between the hole and the boiler through-wall portion 7.

[0040] Reference Figure 1 , Figure 2 and Figure 3The wall 6 has four mounting holes 61 extending through it along the length of the boiler through-wall portion 7, perpendicular to the length of the through-wall portion 7. These four mounting holes 61 are evenly distributed circumferentially along the length of the through-wall portion 7, and each mounting hole 61 is located at the centerline of the side containing the through-wall portion 7. The mounting device 1 includes a mounting sleeve 11. In this embodiment, the mounting sleeve 11 is preferably a hollow cylindrical sleeve, with both ends open. The mounting sleeve 11 is placed vertically, and both ends are blade-shaped. The outer diameter of the mounting sleeve 11 gradually decreases towards its end. A limiting ring 111 is coaxially provided at the bottom end of the inner cavity of the mounting sleeve 11, and the limiting ring 111 is fixedly connected to the mounting sleeve 11 by welding.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The mounting sleeve 11 has multiple sets of locking components spaced apart along its length. Each locking component includes multiple locking units 12, and the locking units 12 are axially evenly distributed along the axis of the mounting sleeve 11. In this embodiment, the number of locking components is preferably three, and the number of locking units 12 is preferably four. The inner wall of the mounting sleeve 11 has a countersunk hole 112 along a horizontal direction parallel to the axis of the mounting sleeve 11. The bottom wall of the countersunk hole 112 has a connecting hole 113, and the axis of the connecting hole 113 is coaxial with the axis of the countersunk hole 112. The end face of the connecting hole 113 away from the countersunk hole 112 is coaxially provided with a receiving groove 114 in a direction away from the countersunk hole 112 along the axis of the connecting hole 113. The countersunk hole 112, the connecting hole 113, and the receiving groove 114 are connected. The locking unit 12 includes a protrusion 121, a connecting rod 122, and a plug plate 123. In this embodiment, the protrusion 121 is preferably a semi-spherical sphere. The horizontal surface of the protrusion 121 is attached to the end face of the countersunk hole 112 near the connecting hole 113, and the protrusion 121 can slide in the countersunk hole 112 along its length. The connecting rod 122 passes through the connecting hole 113 and is fixedly connected to the protrusion 121 by screws. The connecting rod 122 can slide along the connecting hole 113. The plug plate 123 is located in the receiving groove 114, and the plug plate 123 is fixedly connected to the end of the connecting rod 122 away from the protrusion 121 by screws. The plug plate 123 can slide along the length of the receiving groove 114. The end face of the plug plate 123 away from the connecting rod 122 is provided with multiple barbs 124, and the barbs 124 are fixedly connected to the plug plate 123 by welding.

[0042] Reference Figure 2 and Figure 3The mounting device 1 also includes a support assembly, which includes a mounting tube 13. In this embodiment, the outer wall of the mounting tube 13 is attached to the inner wall of the mounting sleeve 11. Both ends of the mounting tube 13 are blade-shaped, and the inclination direction of the blades is consistent with the inclination direction of the mounting sleeve 11. The mounting tube 13 is placed vertically and passes through the inner cavity of the mounting sleeve 11, and can slide along the length of the mounting tube 13. When the blade at the bottom end of the mounting tube 13 abuts against the limiting ring 111, the mounting tube 13 cannot continue to move downward along the mounting sleeve 11.

[0043] Reference Figure 2 and Figure 3 The support device 2 also includes a fixing plate 21, which is horizontally placed and located inside the mounting tube 13. The fixing plate 21 is fixedly connected to the mounting tube 13 by welding. In this embodiment, the distance from the fixing plate 21 to both ends of the mounting tube 13 is the same. The fixing plate 21 has symmetrical mounting blocks 22 and elastic rods 23 at both ends. In this embodiment, the mounting blocks 22 are preferably circular blocks. One end of the elastic rod 23 is fixedly connected to the mounting block 22 by screws, and the other end is fixedly connected to the fixing plate 21 by screws.

[0044] Reference Figure 2 and Figure 5 The end face of the mounting block 22 away from the fixing piece 21 is coaxially provided with a mounting groove 221 along the vertical direction towards the fixing piece 21. In this embodiment, the horizontal cross-section of the mounting groove 221 is preferably circular. The inner cavity of the mounting block 22 has three sets of connecting grooves evenly distributed along the axis of the mounting block 22. The connecting grooves include a vertical groove 222, a horizontal groove 223, and a locking groove 224. The length direction of the vertical groove 222 is consistent with the length direction of the mounting block 22 and extends to the end face of the mounting block 22 in the direction away from the fixing piece 21. The horizontal groove 223 is located at the end of the vertical groove 222 near the fixing piece 21. The locking groove 224 is located at the end of the horizontal groove 223 away from the vertical groove 222 and on the side of the horizontal groove 223 away from the fixing piece 21. The vertical groove 222, the horizontal groove 223, the locking groove 224 and the inner cavity of the mounting block 22 are connected.

[0045] Reference Figure 2 and Figure 4Two connecting devices 3 are provided, symmetrically arranged along the plane of the mounting plate. Each mounting block 22 is equipped with one connecting device 3. The connecting device 3 includes a support block 31. In this embodiment, the support block 31 is preferably a cylindrical block, and the outer wall of the support block 31 fits against the inner wall of the mounting block 22. Three insertion blocks 311 are provided at one end of the outer wall of the support block 31 near the fixing plate 21. The three insertion blocks 311 are evenly distributed circumferentially along the axial direction of the support block 31. The insertion blocks 311 are fixedly connected to the mounting block 22 by screws. Each vertical groove 222 is used for the inner cylindrical tube insertion block 311, and the insertion block 311 can enter the locking groove 224 through the vertical groove 222 and the horizontal groove 223.

[0046] Reference Figure 2 The connecting device 3 further includes a vertical connecting assembly 32, which includes a fixed tube 321, a moving rod 322, a fixing ring 323, a first set screw, and a spring 324. The fixed tube 321 is placed vertically and passes through the inner cavity of the mounting tube 13, and is coaxially fixedly connected to the support block 31 by welding. The moving rod 322 passes through the inner cavity of the fixed tube 321 and can slide along the length of the fixed tube 321. The first set screw is set horizontally and is threadedly connected to the fixed tube 321, passing through the fixed tube 321 and abutting against the side wall of the sliding rod. The fixing ring 323 is set horizontally and is sleeved on the outer wall of the fixed tube 321. The fixing ring 323 and the fixed tube 321 are fixedly connected by screws. The spring 324 is set vertically and is sleeved on the outer cavity of the fixed tube 321. One end of the spring 324 is coaxially fixedly connected to the mounting block 22 by screws, and the other end is coaxially fixedly connected to the fixing ring 323 by welding.

[0047] Reference Figure 2 The connecting device 3 further includes a horizontal connecting assembly 33, which includes a horizontal tube 331, a horizontal rod 332, and a second setter screw. The horizontal tube 331 is horizontally arranged and rotatably connected to the moving rod 322 by a bearing. The horizontal rod 332 passes through the inner cavity of the horizontal tube 331 and can slide along the length of the horizontal tube 331. The second setter screw is vertically arranged and threadedly connected to the fixing ring 323. After passing through the fixing ring 323, the second setter screw abuts against the moving rod 322.

[0048] Reference Figure 1 and Figure 2The fixing device 4 includes two support rods 41, which are respectively installed on two mutually spaced horizontal bars 332. The support rods 41 are horizontally arranged, and their length direction is perpendicular to the length direction of the horizontal bars 332. Each end of the support rod 41 is provided with a fixing block 42. In this embodiment, the fixing block 42 is preferably cubic in shape. The end face of the fixing block 42 near the support rod 41 has a sliding groove along the vertical direction. The inner cavity of the sliding groove contains a sliding block, which can slide along the sliding groove and is fixedly connected to the support rod 41 by screws. A snap-fit ​​groove is provided through the corner of the fixing block 42 near the support rod 41 and away from the wall 6 along the length direction of the boiler through-wall portion 7. An elastic pad 43 is provided on the outer wall of the fixing block 42, and the elastic pad 43 is fixedly connected to the fixing block 42 by screws.

[0049] Reference Figure 1 and Figure 2 The fixing device 4 also includes two connecting plates 44, which are respectively installed on the two crossbars 332 that do not have support rods 41. The connecting plates 44 are horizontally arranged, and the length direction of the connecting plates 44 is perpendicular to the length direction of the crossbars 332. The connecting plates 44 are fixedly connected to the crossbars 332 by screws. The two ends of the connecting plates 44 abut against the side walls of the fixing blocks 42. The fixing blocks 42 are provided with guide grooves along the length direction of the boiler through-wall portion 7 on the end face of the connecting plates 44. The inner cavity of the guide groove is provided with guide blocks. The guide blocks can slide along the guide grooves and are fixedly connected to the connecting plates 44 by screws.

[0050] Reference Figure 1 and Figure 2 The sealing device 5 includes a fixing component 51. A limiting groove is provided on the end face of the fixing pipe 321 near the boiler through-wall portion 7 along the length of the boiler through-wall portion 7. A limiting block is provided inside the limiting groove, and the limiting block can slide along the limiting groove. The fixing component 51 includes a telescopic rod 511, a support plate 512, and a first sealing gasket 513. One end of the telescopic rod 511 is fixedly connected to the limiting block by screws, and the other end is fixedly connected to the support plate 512. The support plate 512 is located inside the cavity of the hole, and the length direction of the support plate 512 is in the same direction as the side wall of the hole. The end of the support plate 512 away from the fixing pipe 321 is fixedly connected to the telescopic rod 511 by screws, and both ends of the support plate 512 abut against two fixing blocks 42. The first sealing gasket 513 covers the peripheral wall of the support plate 512 and is fixedly connected to the support plate 512 by screws.

[0051] Reference Figure 1 and Figure 2The sealing device 5 also includes a wedge-shaped strip 52. In this embodiment, the cross-section of the wedge-shaped strip 52 is preferably a right-angled triangle, and the number of wedge-shaped strips 52 is preferably four, with both ends of the wedge-shaped strip 52 abutting against the fixing block 42. Each connecting plate 44 or support rod 41 is equipped with a wedge-shaped strip 52. One right-angled side of the wedge-shaped strip 52 abuts against the boiler through-wall portion 7, and the other right-angled side is fixedly connected to the connecting plate 44 or support rod 41. The outer wall of the wedge-shaped strip 52 is covered with a second sealing gasket 521, and the second sealing gasket 521 is fixedly connected to the wedge-shaped strip 52 by screws. In this embodiment, during the process of mutual contact and compression of the elastic gasket 43, the first sealing gasket 513, and the second sealing gasket 521, gas and dust cannot pass through. The two wedge-shaped strips 52, the wall 6, and the boiler through-wall portion 7 together enclose 53.

[0052] Referring to the figure, the inner cavity of 53 is provided with high-strength fiber ceramic 54 and special fiber adhesive. The high-strength fiber ceramic 54 is fixedly connected to the wall 6 and the boiler through-wall part 7 by the special fiber adhesive.

[0053] The implementation principle of the furnace top fixing device for power plant boilers in this application embodiment is as follows: the operator first opens the installation hole 61 on the wall 6, then the operator places the installation sleeve 11 into the inner cavity of the installation hole 61, and then places the installation pipe 13 into the inner cavity of the installation sleeve 11, so that the plug plate 123 abuts against the side wall of the wall 6.

[0054] The operator then fixes the support block 31 to the mounting block 22 through the engagement between the plug-in block 311 and the locking groove 224. Next, the operator adjusts the positional relationship between the fixing pipe 321 and the moving rod 322, and between the horizontal pipe 331 and the horizontal bar 332, so that the support rod 41 or the connecting plate 44 is located within the cavity of the hole. The operator then fixes the fixing pipe 321 to the corner of the hole. The length of the telescopic rod 511 is adjusted so that the support plate 512 is located within the cavity of the hole. Finally, the wedge-shaped strip 52 abuts against the side wall of the boiler through-wall 7, the fixing block 42, and the support plate 512, respectively.

[0055] When the boiler through-wall section 7 expands due to heat, it presses against the fixing block 42, causing the two wedge-shaped strips 52 to move away from each other. When the boiler through-wall section 7 cools, its sidewalls contract, causing the two wedge-shaped strips 52 to move closer together under the action of the elastic rod 23. This seals the gaps between the rear openings of the boiler through-wall section 7, preventing ash and smoke leakage and overheating, thus protecting the working environment of surrounding operators.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A furnace top fixing device for a thermal power plant boiler, characterized in that: The system includes a support device (2), a fixing device (4), and a sealing device (5). The wall has a hole at the boiler penetration point, and the boiler penetration point passes through the hole. Each end face of the boiler penetration point has a centrally located mounting hole in the wall. The support device (2) includes a fixing plate (21) located in the mounting hole. Each end face of the fixing plate (21) has an elastic rod (23) and a horizontal connecting assembly (33). The horizontal connecting assembly (33) can move towards or away from the fixing plate (21) and is restricted by the elastic rod (23). Two mutually spaced horizontal connecting assemblies (33) are installed at the boiler penetration point. A support rod (41) and the other horizontal connecting components (33) are equipped with connecting plates (44) at the boiler wall penetration part. Both ends of the support rod (41) are provided with fixing blocks (42). The side walls of the fixing blocks (42) abut against the wall, and the support rod (41) can slide along the fixing blocks (42). The support rod (41) abuts against the fixing blocks (42) and slides along the fixing blocks (42). The connecting plate (44) and / or the support rod (41) are both fixed with wedge strips (52). Both ends of the wedge strips (52) abut against the fixing blocks (42). One end face of the wedge strips (52) abuts against the boiler wall penetration part, and the other end face abuts against the wall. A vertical connecting component (32) is provided between the fixing plate (21) and the horizontal connecting component (33). The vertical connecting component (32) includes a fixing tube (321). The horizontal connecting component (33) is detachably connected to the elastic rod (23) through the fixing tube (321). A telescopic rod (511) and a support plate (512) are provided at the fixing tube (321). The support plate (512) slides along the fixing tube (321) through the telescopic rod (511). The support plate (512) is located in the inner cavity of the hole and fits against the wall. Both ends of the support plate (512) abut against the fixing block (42). The wedge strip (52) abuts against the support plate (512). The support plate (512) is covered with a first sealing gasket (513), the wedge strip (52) is covered with a second sealing gasket (521), and the fixing block (42) is covered with an elastic gasket (43). The first sealing gasket (513), the second sealing gasket (521) and the elastic gasket (43) are pressed against each other.

2. The furnace top fixing device for a thermal power plant boiler according to claim 1, characterized in that: The fixing plate (21) is provided with a mounting block (22). The inner cavity of the mounting block (22) is provided with a mounting groove (221). The side wall of the mounting groove (221) is provided with a vertical groove (222), a horizontal groove (223) and a locking groove (224). The vertical groove (222) and the locking groove (224) are located on the same side of the horizontal groove (223) and are connected through the horizontal groove (223). The fixing tube (321) is fixedly connected with a plug-in block (311) and a spring (324). The plug-in block (311) can enter the locking groove (224) through the vertical groove (222) and the horizontal groove (223). One end of the spring (324) is fixedly connected to the mounting block (22) and the other end is fixedly connected to the fixing tube (321).

3. The furnace top fixing device for a thermal power plant boiler according to claim 2, characterized in that: The inner cavity of the fixed tube (321) is provided with a movable rod (322), which can slide along the fixed tube (321), and the horizontal connecting assembly (33) is rotatably connected to the movable rod (322).

4. The furnace top fixing device for a thermal power plant boiler according to claim 3, characterized in that: The horizontal connecting assembly (33) includes a horizontal tube (331) and a horizontal bar (332). The horizontal tube (331) is rotatably connected to the moving rod (322). The horizontal bar (332) passes through the inner cavity of the horizontal tube (331) and can be slidably connected along the horizontal tube (331). The support rod (41) and / or the connecting plate (44) are fixedly connected to the horizontal bar (332).

5. The furnace top fixing device for a thermal power plant boiler according to claim 1, characterized in that: It also includes an installation device (1), which includes an installation sleeve (11) and an installation tube (13). The installation sleeve (11) passes through the installation hole. The side wall of the installation sleeve (11) is provided with a countersunk hole (112) and a receiving groove (114) from the inside to the outside. The countersunk hole (112) and the receiving groove (114) are connected. A protrusion (121) is provided in the countersunk hole (112). A plug-in plate (123) is provided in the receiving groove (114). The protrusion (121) is fixedly connected to the plug-in plate (123). The installation tube (13) passes through the inner cavity of the installation sleeve (11) and is slidably connected to the installation sleeve (11). The fixing piece (21) is located in the inner cavity of the installation tube (13) and is fixedly connected to the installation tube (13).

6. The furnace top fixing device for a thermal power plant boiler according to claim 5, characterized in that: Both ends of the mounting sleeve (11) and the mounting tube (13) are blade-shaped, and the outer diameter of the mounting sleeve (11) and / or the mounting tube (13) gradually decreases near the end.

7. The furnace top fixing device for a thermal power plant boiler according to claim 6, characterized in that: The inner cavity of the mounting sleeve (11) is fixed to the bottom end with a limiting ring (111), and the mounting tube (13) abuts against the limiting ring (111).

8. The furnace top fixing device for a thermal power plant boiler according to claim 1, characterized in that: High-strength fiber ceramic (54) is filled between the two wedge-shaped strips (52).

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