Sealing device for tube panel passing through wall

Abstract

The present application provides a sealing device for a tube screen passing through a wall. The tube screen passes through an opening in the wall, and the sealing device can seal and cover the opening. The sealing device includes an annular deformation part and a clamping part. One side of the deformation part is used for sealing connection with the wall, and the other side of the deformation part is in sealing connection with the clamping part; the clamping part includes two clamping sub-parts. One side of the clamping sub-part is connected to the deformation part, and at least one concave part is provided on the other side of each clamping sub-part. The concave parts of the two clamping sub-parts correspond to each other, and the corresponding two concave parts cooperate to circumferentially clamp a tube body of the tube screen; moreover, a sealing filler is filled between the inner side of the clamping sub-part and the tube body. This sealing device can reduce or eliminate expansion difference stress while keeping the tube screen and the wall sealed.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing, and particularly to a sealing device for a tube panel passing through a wall. Background Art

[0002] The furnace wall of a boiler is connected to other equipment through a tube panel, and the tube panel needs to pass through the furnace wall. During the working process, affected by the heating field and the steam-water fluctuation, the temperature difference between the tube bodies of the tube panel inserted into the furnace wall is very large. Correspondingly, the expansion difference between the tube bodies is very large. At present, the position where the tube panel passes through the wall is a fixed connection structure, and both ends of the tube body are fixedly connected. The stress caused by the expansion difference between the tubes is relatively large, which may damage the connection. Summary of the Invention

[0003] The purpose of the present application is to provide a sealing device for a tube panel passing through a wall, which can reduce or eliminate the expansion difference stress while keeping the tube panel and the wall sealed.

[0004] The present application provides a sealing device for a tube panel passing through a wall. The tube panel passes through an opening in the wall. The sealing device can seal and cover the opening. The sealing device includes an annular deformation part and a clamping part. One side of the deformation part is used for sealing connection with the wall, and the other side of the deformation part is hermetically connected to the clamping part;

[0005] The clamping part includes two clamping sub-parts. One side of the clamping sub-part is connected to the deformation part. At least one concave part is provided on the other side of each clamping sub-part. The concave parts of the two clamping sub-parts correspond to each other, and the corresponding two concave parts cooperate to circumferentially clamp a tube body of the tube panel; and, a sealing filler is filled between the inner side of the clamping sub-part and the tube body.

[0006] Optionally, the clamping sub-part is a corrugated plate, and the corrugated plate includes the concave parts and convex parts alternately distributed along its length direction.

[0007] Optionally, the sealing device further includes a fastener, and the fastener can pass through the gap between the two clamping sub-parts and the two tube bodies to lock and fix the two clamping sub-parts.

[0008] Optionally, the deformation part includes an expansion bend.

[0009] Optionally, the sealing device further includes a connecting base, and the connecting base includes an annular connecting substrate and two annular connecting transition plates nested with each other. The connecting substrate is hermetically connected to the wall, and the connecting transition plates are welded and fixed to the connecting substrate; one side of the deformation part includes an annular first connecting plate, and the first connecting plate is located between the two connecting transition plates, and a sealing filler is filled between the first connecting plate and the two connecting transition plates. The first connecting plate and the two connecting transition plates are fastened by fasteners.

[0010] Optionally, the sealing device further includes an annular cover plate. One side of the cover plate surrounds the clamping portion and is sealingly connected, and the other side of the cover plate is connected to the deformation portion; the other side of the deformation portion includes an annular second connecting plate; the sealing device further includes an annular fixing plate. The second connecting plate is located between the cover plate and the fixing plate, and sealing fillers are filled between the second connecting plate and the cover plate as well as between the second connecting plate and the fixing plate. The second connecting plate, the cover plate, and the fixing plate are fastened by fasteners.

[0011] Optionally, the sealing device further includes an annular plate. The annular plate is disposed around the clamping portion, and the annular plate is fixedly welded to the cover plate.

[0012] Optionally, the expansion bend includes a U-shaped portion. Two side wall portions of the U-shaped portion are distributed in a direction perpendicular to the wall; one side wall portion of the U-shaped portion is connected to a first connecting plate, and the other side wall portion of the U-shaped portion is connected to a second connecting plate. The first connecting plate is connected to the wall, and the second connecting plate is connected to the clamping portion.

[0013] Optionally, a plurality of grooves distributed axially are provided on the inner side of the clamping sub-portion. Sealing fillers are filled between the inner sides of both axial ends of the clamping sub-portion and the pipe body, and the plurality of grooves form a labyrinth seal structure.

[0014] Optionally, the sealing device further includes an annular first limiting plate and an annular second limiting plate. One side of the second limiting plate is fixed to the first limiting plate, and an annular groove is formed between the second limiting plate and the first limiting plate; the tube screen can pass through the first limiting plate, and the sealing filler on the outer periphery of the tube body abuts against the first limiting plate along the axial direction of the tube body; the clamping portion is connected with an annular baffle plate, the baffle plate is inserted into the annular groove, and the outer diameter of the baffle plate is smaller than the outer diameter of the annular groove.

[0015] Optionally, at least one of the first limiting plate and the second limiting plate is formed by splicing at least two limiting sub-plates.

[0016] In this application, one side of the deformation part of the sealing device is sealingly connected to the wall body, and the other side of the deformation part is sealingly connected to the clamping part. Then, the sealing device is clamped at the opening position of the wall body, and only the position formed by the clamping part is a through hole. The clamping position of the clamping part is penetrated by a pipe body, and a sealing filler is filled between the pipe body and the clamping part. That is to say, the sealing device is sealed with both the wall body and the pipe body. At the same time, due to its characteristics, the deformation part can allow a certain amount of deformation. Therefore, after the tube screen penetrates the sealing device, even if a thermal expansion difference occurs due to the temperature difference, the expansion amount of the pipe body in the length direction can be absorbed by the deformation of the deformation part. Thus, the connection will not be damaged due to the thermal expansion difference, making the connection between the sealing device and the pipe body stable and reliable. It can be seen that this sealing device can take into account both sealing and reducing or eliminating thermal expansion difference stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of the sealing device in the embodiment of the present application for sealing a tube screen passing through a wall body;

[0018] Figure 2 is Figure 1 a schematic diagram of the wall body in;

[0019] Figure 3 is Figure 1 a schematic diagram of the cooperation between the sealing device and the tube screen in;

[0020] Figure 4 is Figure 1 a right view of;

[0021] Figure 5 is Figure 1 a top view of;

[0022] Figure 6 is Figure 3 an enlarged view of part C in;

[0023] Figure 7 is Figure 3 a schematic diagram of the clamping part and the annular plate in;

[0024] Figure 8 is Figure 4 an enlarged view of part B in;

[0025] Figure 9 is Figure 4 an enlarged view of part A in.

[0026] Figure 10 FIG. is a schematic diagram of the cooperation between another structural sealing device and a tube screen in the embodiment of the present application;

[0027] Figure 11 is Figure 10 an enlarged view of part D in.

[0028] Figures 1 - 11 The descriptions of the reference numerals in the drawings are as follows:

[0029] 100 - Wall; 101 - Steel pipe; 100a - Opening;

[0030] 200 - Sealing device;

[0031] 201 - Cover plate; 2011 - First straight plate part; 2012 - Second straight plate part;

[0032] 202 - Clamping part; 2021 - Clamping sub - part; 20211 - Concave part; 20212 - Convex part; 2021a - Groove; 2022 - Locking plate; 202a - Positioning;

[0033] 203 - Deformation part; 2031 - U - shaped part; 2032 - First connecting plate; 2033 - Second connecting plate;

[0034] 204 - Connecting base; 2041 - Connecting base plate; 2042 - Transition connecting plate;

[0035] 205 - Second bolt;

[0036] 206 - Third bolt;

[0037] 207 - Fixed plate;

[0038] 2081 - First sealing filler; 2082 - Second sealing filler; 2083 - Third sealing filler;

[0039] 209 - First limiting plate;

[0040] 210 - Second limiting plate;

[0041] 211 - Baffle;

[0042] 212 - Annular plate;

[0043] 213 - First bolt;

[0044] 214 - Third limiting plate;

[0045] 200a - Annular groove;

[0046] 300 - Tube screen; 301 - Tube body; 3011 - Tube sleeve; 3012 - Tube body proper;

[0047] S - Sealing cavity. Detailed implementation manners

[0048] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0049] Please refer toFigures 1 to 3 , Figure 1 This is a schematic diagram of the sealing device 200 in the embodiment of the present application for sealing the tube screen 300 passing through the wall 100; Figure 2 is Figure 1 a schematic diagram of the wall 100 in; Figure 3 is Figure 1 a schematic diagram of the cooperation between the sealing device 200 and the tube screen 300 in.

[0050] This embodiment provides a sealing device 200 for the tube screen 300 passing through the wall. As Figure 1 shown, the tube screen 300 is a tube body assembly, including a plurality of tube bodies 301. The tube screen 300 in this embodiment is specifically Figure 1 a row of tube bodies 301 shown in. Of course, the sealing device 200 can also be applicable to the case of a single tube body 301. An opening 100a is provided on the wall 100, and the tube screen 300 can pass through the opening 100a of the wall 100, thereby connecting the inside and outside of the wall 100. The specific application scenario in this embodiment is a boiler, and the wall 100 is the furnace wall of the boiler. The furnace wall is specifically composed of a plurality of steel pipes 101 arranged side by side. Stretching and bending the steel pipes 101 at a local position can form the above-mentioned opening 100a, as Figure 2 shown. One end of the tube body 301 can pass through the wall 100 to communicate with the inside of the boiler, and the other end can be connected to equipment such as a header. This embodiment does not limit this. It can be seen that the application scenario of the sealing device 200 is not limited to boilers. Any scenario where the wall 100 is penetrated by the tube screen 300 and there is a differential expansion can be applicable.

[0051] Please also combine with Figure 4 , 5 to understand that Figure 4 is Figure 1 a right view of, shown from a vertical sectional perspective; Figure 5 is Figure 1 a top view of, shown from a horizontal sectional perspective.

[0052] The sealing device 200 in this embodiment covers the opening 100a of the wall 100. The sealing device 200 specifically includes an annular deformation part 203 and a clamping part 202. One side of the annular deformation part 203 is used for sealing connection with the opening 100a of the wall 100, that is, connected to the edge around the opening 100a, or having a certain distance from the four edges of the opening 100a. The so-called four weeks mentioned in the text refers to going around in a circle, as Figure 1As shown in the figure, when projected along a direction perpendicular to the wall 100, the projection plane of the opening 100a is located within the projection plane of the sealing device 200. In this way, it can be ensured that the sealing device 200 covers the opening 100a. The other side of the deformation part 203 is hermetically connected to the clamping part 202. If the deformation part 203 is annular, it includes two annular edges, one annular edge is on one side, and the other annular edge is on the other side. Figure 4 In the figure, along a direction perpendicular to the wall 100, one side of the deformation part 203 is closer to the wall 100 than the other side. The side closer to the wall 100 is connected to the wall 100, and the other side away from the wall 100 is connected to the clamping part 202. In this embodiment, the deformation part 203 is specifically connected to the clamping part 202 through the cover plate 201, and each part will be described in detail below.

[0053] Please refer to Figure 6 、 7 , Figure 6 which is Figure 3 the enlarged view of part C in the figure; Figure 7 and Figure 3 is the schematic diagram of the clamping part 202 and the annular plate 212 in the figure.

[0054] The clamping part 202 in this embodiment includes two clamping sub-parts 2021. The clamping sub-part 2021 is specifically the Figure 7 corrugated plate shown in the figure. Each clamping sub-part 2021 is provided with at least one recess 20211. The recesses 20211 of the two clamping sub-parts 2021 correspond to each other. The corresponding two recesses 20211 form a group. The notches of a group of recesses 20211 face each other, so that a group of recesses 20211 can cooperate to circumferentially clamp a tube body 301 of the tube screen 300. That is, the recess 20211 of one clamping sub-part 2021 and the recess 20211 of the corresponding other clamping sub-part 2021 enclose a clamping position 202a. Then, after the two clamping sub-parts 2021 are butted, a plurality of clamping positions 202a corresponding to the plurality of tube bodies 301 of the tube screen 300 can be formed. As shown in Figure 7 the figure, a row of clamping positions 202a is formed. Specifically, the corrugated plate as the clamping sub-part 2021 extends along the arrangement direction of a row of tube bodies 301. It can be seen that the two clamping sub-parts 2021 can be spliced to form the clamping part 202. As shown in Figure 3 、 4 the figure, the periphery of the clamping part 202 can be hermetically connected to the side of the deformation part 203 away from the wall 100 through the cover plate 201, that is, the deformation part 203 and the clamping part 202 are indirectly connected. Of course, the two can also be directly connected.

[0055] It can be further combined with Figure 6 and refer to Figure 8 for understanding. Figure 8 which is Figure 4Enlarged view of part B in the figure.

[0056] In this embodiment, a sealing filler is filled between the clamping part 2021 and the pipe body 301, which can be defined as the first sealing filler 2081. After the clamping part 2021 clamps the pipe body 301, it presses against the first sealing filler 2081. The first sealing filler 2081 can seal the gap between the clamping part 202 and the pipe body 301 to achieve the sealed connection between the clamping part 202 and the pipe body 301. The first sealing filler 2081 can be wrapped around the outer periphery of the pipe body 301, and when the two clamping parts 2021 are buckled, they can abut against the first sealing filler 2081. As Figure 8 shown, the concave part 20211 of the corrugated plate is a small semi-circular arc part. A group of concave parts 20211 do not completely surround the pipe body 301. At this time, the position between the clamping part 202 and the pipe body 301 also includes the position between adjacent pipe bodies 301, that is, the first sealing filler 2081 is also filled between adjacent pipe bodies 301. It can be seen that if the tube panel 300 only includes one pipe body 301, then after the two corrugated plates are buckled, they directly and completely surround the pipe body 301. In addition, all the sealing fillers in this embodiment are made of soft sealing materials and have elasticity, so as to form a seal. According to specific application scenarios, such as when applied to a boiler, the sealing filler should also have the characteristic of high temperature resistance.

[0057] With such a setting, one side of the deformation part 203 is hermetically connected to the wall body 100, and the other side of the deformation part 203 is hermetically connected to the clamping part 202. Then only the position of the clamping hole 202a formed by the clamping part 202 is a through hole, and the pipe body 301 passes through the clamping hole 202a of the clamping part 202, and the first sealing filler 2081 is filled between the pipe body 301 and the clamping part 202. That is to say, the sealing device 200 is hermetically sealed with both the wall body 100 and the pipe body 301. At the same time, based on its characteristics, the deformation part 203 can allow a certain amount of deformation. After the tube panel 300 passes through the sealing device 200, even if a thermal expansion difference occurs due to the temperature difference, the expansion amount of the pipe body 301 in the length direction (i.e., the axial direction of the pipe body 301) can be absorbed by the deformation of the deformation part 203, and the expansion amount of the pipe body 301 in the radial direction can be absorbed by the first sealing filler 2081. Therefore, the connection will not be damaged due to the thermal expansion difference, so that the connection between the sealing device 200 and the pipe body 301 is stable and reliable. It can be seen that the sealing device 200 can take into account both sealing and eliminating thermal expansion difference stress. The material of the sealing filler in this application is not limited as long as it can achieve sealing, for example, it is a ceramic fiber material.

[0058] You can continue to refer to Figure 6 、 7, in this embodiment, the clamping part 2021 is a corrugated plate. The corrugated plate includes concave parts 20211 and convex parts 20212 that are alternately distributed along its length direction. The concave part 20211 is used to clamp the pipe body 301 and provide half of the clamping position 202a. The pipe body 301 of the pipe screen 300 is generally circular, so the concave part 20211 is correspondingly arc-shaped. It can be seen that the concave part 20211 can be as Figure 6 shown. Except for the concave parts 20211 at both ends being set to be nearly semi-circular, the remaining concave parts 20211 can be set to be less than semi-circular to avoid the convex part 20212 being inserted too far between two adjacent pipe bodies 301, which may cause interference, and ensure that the two opposite concave parts 20211 can be as close to each other as possible, so as to better press against the pipe body 301 and improve the sealing effect. It can be seen that the clamping part 2021 does not have to be a corrugated plate. As Figure 8 shown, along the depression direction of the concave part 20211 or the protruding direction of the convex part 20212 of the corrugated plate is the thickness direction of the corrugated plate. The thickness of the corrugated plate is basically the same. The concave part 20211 of the corrugated plate appears as a convex part on the opposite side, and the convex part 20212 of the corrugated plate appears as a concave part on the opposite side. The basic purpose of setting the corrugated plate is to form the concave part 20211 to clamp the pipe body 301. Therefore, the clamping part 2021 is not limited to being a corrugated plate. For example, it can be a block structure, and only multiple concave parts 20211 are provided on one side, which is also possible. However, when set as a corrugated plate, the plate wall is thinner and the clamping is easier to achieve.

[0059] Exemplarily, the sealing device 200 in this embodiment further includes fasteners. The fasteners specifically include the first bolt 213 in Figure 6 、 7 . The fasteners can pass through the gap between two pipe bodies 301 to lock and fix the two clamping parts 2021. There are various ways for the two clamping parts 2021 to clamp the pipe body 301. For example, Figure 6 shows that the two clamping parts 2021 have locking plates 2022 at both ends in the length direction. The two locking plates 2022 are locked and fitted together by the first bolt 213. Just locking with the first bolt 213 at the end can also achieve the locking purpose. However, in this embodiment, in addition to both ends in the length direction of the clamping part 2021, a plurality of first bolts 213 are also arranged. The plurality of first bolts 213 between both ends directly pass through the gap between two adjacent pipe bodies 301 to connect the two clamping parts 2021, that is, the first bolt 213 penetrates through a group of convex parts 20212 and the first sealing filler 2081 between two adjacent pipe bodies 301. In this way, the two clamping parts 2021 can be locked more reliably, the pressing force on the pipe body 301 can be increased, and the sealing effect can be ensured. It can be seen that the above-mentioned concave part 20211 of the corrugated plate being an arc less than a semi-circle is also beneficial for reserving a gap for the first bolt 213 to pass through.

[0060] Please continue to combine with Figure 9 for understanding Figure 9 the Figure 4 magnified view of part A in

[0061] As a specific example, the deformation part 203 in this embodiment is an expansion bend, and more specifically, it is a bent expansion bend. The expansion bend includes a U-shaped part 2031, and the U-shape is the cross-sectional shape of the expansion bend. One end of the U-shaped part 2031 is connected with a first connecting plate 2032, and the other end of the U-shaped part 2031 is connected with a second connecting plate 2033. That is, the expansion bend is generally in a "Ji" shape. The expansion bend of this structure has a certain deformation ability, specifically, the deformation ability along the distribution direction of the two side wall parts of the U-shaped part 2031. The two side wall parts can be relatively separated, making the opening of the U-shaped part 2031 larger. It can be seen that the expansion bend is not limited to being bent, for example, it can be corrugated, sleeve type, etc. The expansion bend itself belongs to an existing elastic structure, and this embodiment will not elaborate further. The deformation part 203 is not limited to the several structural forms listed. As long as it has the deformation ability to offset the expansion difference of the pipe body 301, in addition, the deformation part 203 is close to the wall 100 of the boiler. Since the boiler operates at a high temperature, in this application scenario, the deformation part 203 should also have the performance of high temperature resistance. Metal or non-metal materials that meet the performance of being able to deform and have high temperature resistance can be used to make the deformation part 203 described in this application. The expansion bend in this embodiment can specifically be made of steel material.

[0062] Furthermore, as Figure 9 shown, the sealing device 200 in this embodiment further includes a connecting base 204. The connecting base 204 includes an annular connecting substrate 2041 and two nested cylindrical connecting transition plates 2042. The connecting substrate 2041 is hermetically connected to the wall 100. For example, the connecting substrate 2041 can be an annular steel plate, and the connecting substrate 2041 can be welded to the outside of the wall 100. The connecting transition plates 2042 of the connecting base 204 can be welded and fixed to the connecting substrate 2041. As Figure 9 shown, the connecting transition plates 2042 are perpendicular to the connecting substrate 2041, and the connecting base 204 forms a base connected to the deformation part 203.

[0063] One side of the deformation part 203 includes an annular first connecting plate 2032. The first connecting plate 2032 can be inserted between the two connecting transition plates 2042, and a sealing filler is filled between the first connecting plate 2032 and the two connecting transition plates 2042. The sealing filler here can be defined as the second sealing filler 2082. The first connecting plate 2032 and the two connecting transition plates 2042 are fastened by fasteners. The fasteners can be Figure 9The second bolt 205 shown in [the figure]. Through the clamping and sealing connection of the first connecting plate 2032 and the two connecting transition plates 2042, the sealing connection between the deformation part 203 and the wall body 100 can be reliably achieved. It can be seen that it is also possible to directly connect the deformation part 203 to the wall body 100, but connecting through the connecting base 204 is easier to achieve, especially Figure 9 the expansion bend shown in [the figure]. If the first connecting plate 2032 is directly welded to the wall body 100, the welding area is small, while connecting to the connecting base 204 makes the connection more reliable and easier to implement. In addition, connecting the deformation part 203 and the connecting base 204 in the above manner is a detachable sealing connection method, which is convenient for removing the sealing device 200 from the wall body 100.

[0064] As Figure 5 、 9 shown, the sealing device 200 further includes an annular cover plate 201. One annular side of the cover plate 201 is connected to the clamping part 202, and the periphery of the clamping part 202 and the cover plate 201 are hermetically connected, that is, the cover plate 201 is arranged around the clamping part 202. The other annular side of the cover plate 201 is connected to the deformation part 203, that is, the clamping part 202 is indirectly connected to the deformation part 203 through the cover plate 201. The other side of the deformation part 203 includes an annular second connecting plate 2033. The sealing device 200 further includes an annular fixing plate 207. The second connecting plate 2033 is located between the other side of the cover plate 201 and the fixing plate 207, and sealing fillers are filled between the second connecting plate 2033 and the cover plate 201 as well as the fixing plate 207. The sealing filler here can be defined as the third sealing filler 2083. The second connecting plate 2033 and the cover plate 201, the fixing plate 207 are fastened by fasteners, and the fasteners can be Figure 9 the third bolt 206 shown in [the figure]. In the same connection method as the first connecting plate 2032, the second connecting plate 2033 is clamped between the cover plate 201 and the fixing plate 207, which can also better achieve the sealing connection.

[0065] As Figure 9As shown, the cover plate 201 in this embodiment includes a first straight plate portion 2011 and a second straight plate portion 2012. The second straight plate portion 2012 is substantially parallel to the wall 100, and the second straight plate portion 2012 is substantially perpendicular to the first straight plate portion 2011. The first connecting plate 2032 and the second connecting plate 2033 of the deformation portion 203 are substantially parallel to the first straight plate portion 2011. In this way, on the one hand, the two side wall portions of the U-shaped portion 2031 of the expansion bend can be arranged in a direction perpendicular to the wall 100, which is conducive to absorbing the thermal expansion deformation of the pipe body 301. At the same time, this arrangement also makes a certain distance between the sealing device 200 and the wall 100, thereby forming a sealing cavity S. That is, the sealing device 200 is a sealing box structure clamped at the opening 100a position of the wall 100, which is convenient for the threading installation of the pipe screen 300 and provides a more flexible deformation space.

[0066] In addition, as Figure 8 shown, the sealing device 200 further includes an annular plate 212. The annular plate 212 surrounds the clamping portion 202. Specifically, each corrugated plate is provided with a split plate, and the two split plates are butted to form an annular plate 212. The pipe screen 300 in this embodiment includes a row of pipe bodies 301. Correspondingly, the clamping portion 202 is also substantially strip-shaped. At this time, the annular plate 212 is a strip-shaped annular straight plate, and the straight plate is provided with holes adapted to the clamping portion 202. Specifically, one side of each split plate of the annular plate 212 is provided with corrugated teeth to be adapted to the clamping branch portion 2021. The annular plate 212 and the clamping portion 202 can be fixedly welded or hermetically connected, or the annular plate 212 and the clamping portion 202 can also be integrally provided. The setting of the annular plate 212 is conducive to overlapping and fixing with the first straight plate portion 2011 of the cover plate 201. For example, it can be directly welded and fixed to form a sealed connection. It can be seen that it is also possible to directly weld the cover plate 201 to the clamping portion 202.

[0067] Please continue to refer to FIG. 8. The sealing device 200 in this embodiment further includes an annular first limiting plate 209 and an annular second limiting plate 210. The first limiting plate 209 is located at one end of the clamping portion 202 close to the wall 100. The pipe screen 300 can pass through the first limiting plate 209. The first limiting plate 209 is provided with a plurality of holes, and each hole corresponds to a pipe body 301. The pipe screen 300 passes through the clamping portion 202 and the first limiting plate 209. The inner diameter of the first limiting plate 209 is smaller than the inner diameter of the clamping portion 202. In this way, the first sealing filler 2081 on the outer periphery of the pipe body 301 can resist against the first limiting plate 209 along the axial direction of the pipe body 301 to limit the first sealing filler 2081 and prevent the first sealing filler 2081 from shifting. One side of the annular second limiting plate 210 is fixed to the first limiting plate 209, and an annular groove 200a is formed between the second limiting plate 210 and the first limiting plate 209. Figure 8In it, one side of the second limiting plate 210 is bent to be connected to the first limiting plate 209. The main body part of the second limiting plate 210 is a straight plate, which is substantially parallel to the first limiting plate 209.

[0068] The clamping part 202 is connected with an annular baffle 211. The baffle 211 is arranged around the outer periphery of the clamping part 202 and is located at the end of the clamping part 202 close to the wall body 100. The baffle 211 can be inserted into the annular groove 200a. The outer diameter of the baffle 211 is smaller than the outer diameter of the annular groove 200a. In this way, the annular groove 200a can limit the position of the baffle 211 in the length direction of the pipe body 301, and also limit the relative positions of the clamping part 202, the first limiting plate 209, the second limiting plate 210 and the first sealing filler 2081 in the axial direction of the pipe body 301 to ensure the pressing seal between the clamping part 202 and the first sealing filler 2081. Moreover, the displacement of the baffle 211 in the radial direction perpendicular to the length direction of the pipe body 301 is not affected, and the clamping part 202 can contract radially to press the sealing filler.

[0069] In the first limiting plate 209 and the second limiting plate 210 of this embodiment, at least one of them can be formed by splicing at least two limiting sub - plates, which is beneficial to assembly. Among them, the first limiting plate 209 can be formed by splicing two limiting sub - plates for example. Each limiting sub - plate is also strip - shaped, and corrugated teeth are arranged on one side. The concave parts of the corrugated teeth form half of the hole positions for cooperating with the pipe body 301.

[0070] As Figure 8 shown, in this embodiment, the pipe body 301 includes a pipe main body 3012 and a pipe sleeve 3011 sleeved on the outer periphery of the pipe main body 3012. The pipe sleeve 3011 is fixedly sealed with the pipe main body 3012. The clamping part 202 is used for clamping the pipe sleeve 3011, which is beneficial to protecting the pipe body 301. The first sealing filler 2081 is mainly wrapped around the outer periphery of the pipe sleeve 3011, and can wrap all of it or only include a section of the pipe sleeve 3011 along the axial direction, as long as it meets the sealing with the clamping part 202.

[0071] Figure 10 It is a schematic diagram of the cooperation between the sealing device of another structure in the embodiment of the present application and the pipe screen 300; Figure 11 It is Figure 10 an enlarged view of part D in

[0072] Figure 10 In, the structure of the sealing device is basically the same as that of the above - mentioned embodiment. The difference is that a plurality of grooves 2021a distributed along the axial direction are arranged on the inner side of the clamping sub - part 2021. The axial direction is the axial direction of the pipe body 301. In the above - mentioned embodiment, the space between the clamping sub - part 2021 and the pipe body 301 along the axial direction is filled with the first sealing filler 2081, while Figure 11In the structure, first sealing packing 2081 is filled between the inner sides of the two axial ends of the clamping part 2021 and the pipe body 301, and no sealing packing is filled between the part located between the two axial ends and the pipe body 301. A plurality of grooves 20211a in the part between the two axial ends can form a labyrinth seal structure, which is combined with the first sealing packing 2081 to form a multiple seal structure. When there is a leakage position in the first sealing packing 2081, the middle labyrinth seal structure plays a certain sealing effect by means of the labyrinth effect (i.e., the flue gas forms a vortex in the labyrinth) to increase the local flue gas resistance.

[0073] In addition, in this embodiment, the sealing device 200 further includes an annular first limiting plate 209 and an annular third limiting plate 214. The first limiting plates 209 are distributed at both axial ends of the clamping part 202. The first limiting plate 209 is provided with a plurality of holes, and each hole corresponds to a pipe body 301. The tube panel 300 passes through the clamping part 202 and the first limiting plate 209. The third limiting plate 214 is arranged at both axial ends of the clamping part 202. The two third limiting plates 214 are located between the two first limiting plates 209. The third limiting plate 214 and the first limiting plate 209 at the corresponding end can be connected by bolts, and the third limiting plate 214 can limit the position of the first sealing packing 208. It can be understood that the combination methods of the first limiting plate 209, the second limiting plate 210, and the baffle 211 in the above embodiment, as well as the combination method of the first limiting plate 209 and the third limiting plate 214 here, can be replaced and applied.

[0074] In this article, specific examples are used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A sealing device for a tube screen passing through a wall, which is used for a boiler and the tube screen passes through an opening in the wall, characterized in that, The sealing device can seal the opening covered by the card cover. The sealing device includes an annular deformation part and a clamping part. One side of the deformation part is used for sealing connection with the wall body, and the other side of the deformation part is hermetically connected to the clamping part; The clamping part includes two clamping sub-parts. One side of the clamping sub-part is connected to the deformation part. At least one concave part is arranged on the other side of each clamping sub-part. The concave parts of the two clamping sub-parts correspond to each other, and the corresponding two concave parts cooperate to circumferentially clamp a tube of the tube screen; moreover, a sealing filler is filled between the inner side of the clamping sub-part and the tube. The sealing device further includes an annular first limiting plate and an annular second limiting plate. One side of the second limiting plate is fixed to the first limiting plate, and an annular groove is formed between the second limiting plate and the first limiting plate; the tube screen passes through the first limiting plate, and the sealing filler on the outer periphery of the tube axially abuts against the first limiting plate along the tube; the clamping part is connected with an annular baffle plate, the baffle plate is inserted into the annular groove, and the outer diameter of the baffle plate is smaller than the outer diameter of the annular groove.

2. The sealing device for the tube screen passing through the wall according to claim 1, characterized in that, The clamping sub-part is a corrugated plate, and the corrugated plate includes the concave parts and convex parts alternately distributed along its length direction.

3. The sealing device for the tube screen passing through the wall according to claim 2, characterized in that, The sealing device further includes a fastener, and the fastener can pass through the gap between the two clamping sub-parts and the two tubes to lock and fix the two clamping sub-parts.

4. The sealing device for the tube screen passing through the wall according to claim 1, characterized in that, The deformation part includes an expansion bend.

5. The sealing device for the tube screen passing through the wall according to claim 4, characterized in that, The sealing device further includes a connecting base, and the connecting base includes an annular connecting substrate and two nested annular connecting transition plates. The connecting substrate is hermetically connected to the wall body, and one side of the connecting transition plate is welded and fixed to the connecting substrate; one side of the deformation part includes an annular first connecting plate, the first connecting plate is located between the two connecting transition plates, and a sealing filler is filled between the first connecting plate and the connecting transition plates. The first connecting plate and the two connecting transition plates are fastened by fasteners.

6. The sealing device for the tube screen passing through the wall according to claim 4, characterized in that, The sealing device further includes an annular cover plate. One side of the cover plate surrounds the clamping part and is hermetically connected, and the other side of the cover plate is connected to the deformation part; the other side of the deformation part includes an annular second connecting plate; the sealing device further includes an annular fixing plate. The second connecting plate is located between the cover plate and the fixing plate, and a sealing filler is filled between the second connecting plate and the cover plate and between the second connecting plate and the fixing plate. The second connecting plate and the cover plate, the fixing plate are fastened by fasteners.

7. The sealing device for the tube screen passing through the wall according to claim 6, characterized in that, The sealing device further includes an annular plate, the annular plate is arranged around the clamping part, and the annular plate is welded and fixed to the cover plate.

8. The sealing device for the tube screen passing through the wall according to claim 4, characterized in that, The expansion bend includes a U-shaped part, and the two side wall parts of the U-shaped part are distributed in a direction perpendicular to the wall body; one of the side wall parts of the U-shaped part is connected to a first connecting plate, and the other side wall part of the U-shaped part is connected to a second connecting plate. The first connecting plate is connected to the wall body, and the second connecting plate is connected to the clamping part.

9. The sealing device for the tube screen passing through the wall according to any one of claims 1-8, characterized in that, Among the first limiting plate and the second limiting plate, at least one of them is formed by splicing at least two limiting sub-plates.

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