A highly sealed industrial boiler

Abstract

The present invention provides a highly sealed industrial boiler applied in the field of boiler sealing. Through the setting of a secondary sealing component, when the original sealing structure of the feed port is damaged and leakage occurs, the leaked gas can be collected. On the one hand, the leaked gas is effectively prevented from being directly discharged into the surrounding environment, thereby effectively protecting environmental safety and the health and safety of workers. On the other hand, the collected gas can directly push the active sealing ring, causing it to squeeze the active sealing ring, thereby generating a compressive force on the air bag, thereby transferring the gas inside it to the outside of the driven sealing ring. During the process, both the active sealing ring and the active sealing ring will move toward one side of the boiler body, and just get stuck on the outside of the gas transfer orifice and the connection between the sealing port and the sealing cover, thereby achieving the effect of secondary sealing of the feed port using the leaked gas. Compared with the existing technology, the sealing performance can be greatly improved, and the direct leakage of gas in the boiler body after the seal is damaged can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the field of boiler sealing, and in particular to a highly sealed industrial boiler. Background Art

[0002] Industrial boilers are divided into two categories. Steam boilers are used for power generation or gas supply. For example, fertilizer plants use steam to vaporize coal to synthesize fertilizer. This is a typical industrial boiler, and the majority of industrial boilers are coal-fired. Gas-fired boilers are generally used to recover waste heat. Boiler seals prevent the flue gas in the furnace and flue from leaking into the outside air through non-designated areas of the boiler.

[0003] The boiler needs to remain sealed during use. In the existing technology, when the boiler seal is damaged, it will directly lead to leakage of internal and external gases. This problem will not be discovered until the leakage has occurred, resulting in a major environmental safety hazard and certain health risks to surrounding workers. Summary of the Invention

[0004] The purpose of the present application is to use the leaked gas for secondary sealing when the original structure leaks, thereby temporarily improving the sealing and reducing the safety hazards to the environment and workers. Compared with the existing technology, a high-sealing industrial boiler is provided, including a boiler body, the end of the boiler body is fixedly connected to the feed port, the feed port includes a sealing port and a sealing cover provided at the end of the sealing port, the outer ends of the sealing port and the sealing cover are fixedly connected to a fastening plate, the two fastening plates are fixed by multiple bolts, a secondary sealing ring is provided on the outside of the end where the sealing port and the sealing cover contact each other, the secondary sealing ring is fixedly connected to the sealing cover, a pneumatic cavity is drilled inside the secondary sealing ring, an air guide hole is also drilled inside the secondary sealing ring, a secondary sealing assembly is provided in the pneumatic cavity, and a gas transfer hole is drilled on the inner wall of the sealing cover facing the sealing port, and the gas transfer hole is communicated with the pneumatic cavity.

[0005] Through the setting of the secondary sealing component, when the original sealing structure between the sealing port and the sealing cover is damaged and leakage occurs, the leaked gas can be collected. On the one hand, it can effectively prevent the leaked gas from being directly discharged into the surrounding environment, thereby effectively protecting environmental safety and the health and safety of the staff. On the other hand, the collected gas can directly push the active sealing ring, causing it to squeeze the active sealing ring, thereby generating a compressive force on the air bag, thereby transferring the gas inside it to the outside of the driven sealing ring. In the process, both the active sealing ring and the active sealing ring will move toward the side of the boiler body, and just get stuck on the outside of the gas transfer orifice and the connection between the sealing port and the sealing cover, thereby achieving the effect of secondary sealing of the feed port using the leaked gas. Compared with the existing technology, the sealing performance can be greatly improved, and the direct leakage of gas in the boiler body after the seal is damaged can be effectively avoided.

[0006] Furthermore, the two openings of the air guide hole are respectively located on the inner wall of the pneumatic cavity facing the boiler body and on the inner wall of the top of the pneumatic cavity near the sealing cover. The gas in the air bag is transferred through the air guide hole, so that after leakage, under the joint action of the leaking gas, both the driven sealing ring and the active sealing ring can move toward the side of the boiler body.

[0007] Optionally, a sealing piece is fixedly bonded to the mouth of the air guide hole at the top of the pneumatic cavity. The sealing piece is an elastic sealing structure. The end face of the secondary sealing ring facing away from the boiler body is a transparent structure. The sealing piece is used to seal the color powder to prevent the color powder from leaking directly into the pneumatic cavity. The mouth of the air guide hole is plugged with bright color powder, preferably red, blue, purple, etc. When gas leakage occurs, the inert gas in the ferry bag generates an extrusion force on the sealing piece during the transfer process, exposing the blocked mouth of the air guide hole, so that the color powder is dispersed with the transferred gas into the space formed by the driven sealing ring and the inner wall of the air guide hole away from the boiler body, so that the staff can directly observe the internal color change from the end of the secondary sealing ring, and the leakage warning can be issued to the staff, so that corresponding treatment measures can be taken in time.

[0008] Furthermore, the secondary sealing assembly includes a driven sealing ring, an active sealing ring and an air transfer bag in sequence along the direction approaching the boiler body. The air transfer bag is communicated with the air guide hole, and the active sealing ring and the air transfer bag are in contact with each other. The driven sealing ring and the active sealing ring are both interference fit with the outer wall of the pneumatic cavity and the sealing port or sealing cover.

[0009] Furthermore, a limiting ring is fixedly connected to the outer end of the sealing cover, which is located between the driven sealing ring and the active sealing ring, and the gas transfer orifice is located between the driven sealing ring and the limiting ring. The limiting ring is used to limit the position, effectively limiting the moving position of the driven sealing ring, so that after a gas leakage occurs, the range of its movement toward the side of the boiler body is not easy to be too large, effectively protecting it. Finally, it can block the gas transfer orifice, so that the gas in the boiler body is not easy to continue to leak out.

[0010] Furthermore, the distance between the limit ring and the gas transfer hole is less than the thickness of the driven sealing ring, which effectively ensures that the driven sealing ring can seal the gas transfer hole after displacement, and the sum of the lengths of the active sealing ring and the air bag after full compression is greater than the distance between the end of the sealing port and the inner wall of the pneumatic cavity close to the boiler body, which effectively ensures that the active sealing ring will not separate from the connection between the sealing port and the sealing cover during the final movement, so that the active sealing ring can continue to seal on the outside of the connection, further ensuring the sealing effect of the secondary seal.

[0011] Optionally, the air bag includes a reservoir end and a reservoir end connected between the reservoir end and the inner wall of the pneumatic cavity, the reservoir end is filled with compressed inert gas, a through hole is drilled in the middle of the reservoir end, and the two mouths of the through hole are respectively connected to the reservoir end and the air guide hole, and a sealing plug is provided in the through hole. The sealing plug is used to seal the reservoir end so that the compressed gas inside it is not easy to overflow along the air guide hole when the reservoir end is not squeezed by the active sealing ring, thereby effectively ensuring the stability of the secondary sealing structure.

[0012] Furthermore, the diameter of the sealing plug is no greater than half the inner diameter of the air guide hole, so that after the sealing plug is squeezed and pushed into the air guide hole, it is not easy to cause the air guide hole to be blocked, and the sealing plug is squeezed into contact with the inner wall of the through hole, effectively ensuring the stability of the sealing plug in the through hole, making it difficult for the sealing plug to separate from the through hole due to the action of the internal inert gas.

[0013] Furthermore, the reservoir end is an elastically compressible corrugated structure, which facilitates the change of its lateral length after being squeezed. The reservoir end is a hard structure, and the sealing plug is an elastic silicone rubber structure.

[0014] Compared with the existing technology, the advantages of this application are:

[0015] Through the setting of the secondary sealing component, when the original sealing structure between the sealing port and the sealing cover is damaged and leakage occurs, the leaked gas can be collected. On the one hand, it can effectively prevent the leaked gas from being directly discharged into the surrounding environment, thereby effectively protecting environmental safety and the health and safety of the staff. On the other hand, the collected gas can directly push the active sealing ring, causing it to squeeze the active sealing ring, thereby generating a compressive force on the air bag, thereby transferring the gas inside it to the outside of the driven sealing ring. In the process, both the active sealing ring and the active sealing ring will move toward the side of the boiler body, and just get stuck on the outside of the gas transfer orifice and the connection between the sealing port and the sealing cover, thereby achieving the effect of secondary sealing of the feed port using the leaked gas. Compared with the existing technology, the sealing performance can be greatly improved, and the direct leakage of gas in the boiler body after the seal is damaged can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the front view of the application;

[0017] Figure 2 This is the front view of the feed inlet for this application;

[0018] Figure 3 This is a cross-sectional view of the feed inlet of this application;

[0019] Figure 4 for Figure 3 Schematic diagram at A in the middle;

[0020] Figure 5 for Figure 4 Schematic diagram at point B in the middle;

[0021] Figure 6 This is a schematic diagram of the changes after gas leakage occurs at the sealing port of this application;

[0022] Figure 7 This is a cross-sectional diagram of the air bag of this application;

[0023] Figure 8 This is a schematic diagram of the ferry bag in this application being squeezed to transfer its gas outward.

[0024] Description of the numbers in the figure:

[0025] 1 boiler body, 2 feed port, 21 sealing port, 22 sealing cover, 3 fastening plate, 4 secondary sealing ring, 41 air guide hole, 42 pneumatic cavity, 43 air transfer hole, 5 sealing piece, 61 driven sealing ring, 62 active sealing ring, 7 air bag, 71 reservoir end, 72 positioning end, 73 sealing plug, 8 limit ring. DETAILED DESCRIPTION

[0026] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of this application.

[0027] Example 1:

[0028] The present invention provides a highly sealed industrial boiler. Figure 1-2 , including a boiler body 1, the end of the boiler body 1 is fixedly connected to a feed port 2, the feed port 2 includes a sealing port 21 and a sealing cover 22 provided at the end of the sealing port 21, the outer ends of the sealing port 21 and the sealing cover 22 are fixedly connected to a fastening plate 3, and the two fastening plates 3 are fixed by multiple bolts.

[0029] See also Figure 3-4 A secondary sealing ring 4 is provided outside the end where the sealing port 21 and the sealing cover 22 contact each other. The secondary sealing ring 4 is fixedly connected to the sealing cover 22. A pneumatic cavity 42 is excavated inside the secondary sealing ring 4. An air guide hole 41 is also excavated inside the secondary sealing ring 4. A secondary sealing component is provided in the pneumatic cavity 42. A gas transfer hole 43 is excavated on the inner wall of the sealing cover 22 facing the sealing port 21. The gas transfer hole 43 is communicated with the pneumatic cavity 42. The two mouths of the air guide hole 41 are respectively located on the inner wall of the pneumatic cavity 42 facing the boiler body 1 and on the top inner wall of the pneumatic cavity 42 near the sealing cover 22. The gas in the air bag 7 is transferred through the air guide hole 41, so that after leakage, under the joint action of the leaking gas, the driven sealing ring 61 and the active sealing ring 62 can both move toward the side of the boiler body 1.

[0030] The secondary sealing assembly includes a driven sealing ring 61, an active sealing ring 62 and an air transfer bag 7 in sequence along the direction close to the boiler body 1. The air transfer bag 7 is communicated with the air guide hole 41, and the active sealing ring 62 is in contact with the air transfer bag 7. The driven sealing ring 61 and the active sealing ring 62 are both interference fit with the outer wall of the pneumatic cavity 42 and the sealing port 21 or the sealing cover 22. The outer end of the sealing cover 22 is also fixedly connected to a limiting ring 8, which is located between the driven sealing ring 61 and the active sealing ring 62, and the mouth of the gas transfer hole 43 is located between the driven sealing ring 61 and the limiting ring 8. The limiting ring 8 is used to limit the position, effectively limiting the movement position of the driven sealing ring 61, so that after a gas leakage occurs, the range of its movement toward the side of the boiler body 1 is not easy to be too large, effectively protecting it. Finally, it can block the mouth of the gas transfer hole 43, so that the gas in the boiler body 1 is not easy to continue to leak out.

[0031] It is worth noting that the distance between the limit ring 8 and the gas transfer hole 43 is less than the thickness of the driven sealing ring 61, which effectively ensures that the driven sealing ring 61 can seal the mouth of the gas transfer hole 43 after displacement, and the sum of the lengths of the active sealing ring 62 and the air bag 7 after full compression is greater than the distance between the end of the sealing port 21 and the inner wall of the pneumatic cavity 42 close to the boiler body 1, which effectively ensures that the active sealing ring 62 will not be separated from the connection between the sealing port 21 and the sealing cover 22 during the final movement, so that the active sealing ring 62 can continue to seal on the outside of the connection, further ensuring the sealing effect of the secondary seal.

[0032] By setting the secondary sealing component, when the original sealing structure between the sealing port 21 and the sealing cover 22 is damaged, such as Figure 6 When a leakage occurs, the leaked gas can be collected. On the one hand, the leaked gas can be effectively prevented from being directly discharged into the surrounding environment, thereby effectively protecting environmental safety and the health and safety of the staff. On the other hand, the collected gas can directly push the active sealing ring 62, causing it to squeeze the active sealing ring 62, thereby generating a compressive force on the air bag 7, thereby transferring the gas inside it to the outside of the driven sealing ring 61. In the process, both the active sealing ring 62 and the active sealing ring 62 will move toward the side of the boiler body 1, and just get stuck on the outside of the mouth of the gas transfer hole 43 and the connection between the sealing port 21 and the sealing cover 22, thereby achieving the effect of secondary sealing of the feed port 2 by using the leaked gas. Compared with the existing technology, the sealing performance can be greatly improved, and the direct leakage of the gas in the boiler body 1 after the seal is damaged can be effectively avoided.

[0033] Example 2:

[0034] See also Figure 5The air guide hole 41 is located at the top of the pneumatic cavity 42 and is fixedly bonded with a sealing piece 5. The sealing piece 5 is an elastic sealing structure. The end face of the secondary sealing ring 4 facing away from the boiler body 1 is a transparent structure. The sealing piece 5 is used to seal the toner, so that the toner is not easy to leak directly into the pneumatic cavity 42. The mouth of the air guide hole 41 is plugged with bright toner, which can be preferably red, blue, purple, etc. When gas leakage occurs, the inert gas in the ferry bag 7 produces an extrusion force on the sealing piece 5 during the transfer process, exposing the blocked mouth of the air guide hole 41, so that the toner is dispersed with the transferred gas into the space formed by the driven sealing ring 61 and the inner wall of the air guide hole 41 away from the boiler body 1, so that the staff can directly observe the color change inside it from the end of the secondary sealing ring 4, which can warn the staff of leakage and facilitate timely implementation of corresponding treatment measures.

[0035] This embodiment adds the above content on the basis of embodiment 1, which can serve as a warning in case of gas leakage at the feed inlet 2.

[0036] In addition, a color sensor and an alarm can be adaptively installed at the transparent end of the secondary sealing ring 4. When the color sensor detects a color change in the secondary sealing ring 4, the alarm will sound, which will provide a better warning effect for the staff. This part is an optional setting, and the technicians can choose whether to set it according to their needs during implementation.

[0037] Example 3:

[0038] See also Figure 7 The air bag 7 includes a reservoir end 71 and a reservoir end 72 connected between the reservoir end 71 and the inner wall of the pneumatic cavity 42. The reservoir end 71 is an elastically compressible corrugated structure, which is convenient for it to change in lateral length after being squeezed. The reservoir end 72 is a hard structure, and the sealing plug 73 is an elastic silicone rubber structure. The reservoir end 71 is filled with compressed inert gas. A through hole is opened in the middle of the reservoir end 72, and the two mouths of the through hole are respectively connected to the reservoir end 71 and the air guide hole 41. A sealing plug 73 is provided in the through hole. The sealing plug 73 is used to seal the reservoir end 71, so that the compressed gas inside it is not easy to overflow along the air guide hole 41 when the reservoir end 71 is not squeezed by the active sealing ring 62, thereby effectively ensuring the stability of the secondary sealing structure.

[0039] The diameter of the sealing plug 73 is not greater than half of the inner diameter of the air guide hole 41. Figure 8 , so that after the sealing plug 73 is squeezed and pushed into the air guide hole 41, it is not easy to cause the air guide hole 41 to be blocked, and the sealing plug 73 is squeezed into contact with the inner wall of the through hole, effectively ensuring the stability of the sealing plug 73 in the through hole, making it difficult for it to separate from the through hole due to the action of the internal inert gas.

[0040] This embodiment adds the above content on the basis of embodiment 1 or 2. Compared with embodiment 1 or 2, this embodiment refines the structure of the air bag 7 so that the air bag 7 can be reused after being re-inflated.

[0041] The above is only the best implementation method adopted by this application in combination with current actual needs, but the scope of protection of this application is not limited to this.

Claims

1. A highly sealed industrial boiler, comprising a boiler body (1), wherein the end of the boiler body (1) is fixedly connected to a feed inlet (2), characterized in that: The feed port (2) comprises a sealing port (21) and a sealing cover (22) provided at the end of the sealing port (21); the outer ends of the sealing port (21) and the sealing cover (22) are fixedly connected with a fastening plate (3); the two fastening plates (3) are fixed by a plurality of bolts; the ends where the sealing port (21) and the sealing cover (22) contact each other are provided with a secondary sealing ring (4); the secondary sealing ring (4) is fixedly connected to the sealing cover (22); a pneumatic cavity (42) is bored inside the secondary sealing ring (4); an air guide hole (41) is also bored inside the secondary sealing ring (4); a secondary sealing assembly is provided in the pneumatic cavity (42); an air transfer hole (43) is bored on the inner wall of the sealing cover (22) facing the sealing port (21); the air transfer hole (43) is communicated with the pneumatic cavity (42).

2. A highly sealed industrial boiler according to claim 1, characterized in that: The two openings of the air guide hole (41) are respectively located on the inner wall of the pneumatic cavity (42) facing the boiler body (1) and the inner wall of the top of the pneumatic cavity (42) close to the sealing cover (22).

3. A highly sealed industrial boiler according to claim 1, characterized in that: The mouth of the air guide hole (41) located at the top of the pneumatic cavity (42) is fixedly bonded with a sealing sheet (5), and the mouth of the air guide hole (41) is plugged with bright color powder.

4. A highly sealed industrial boiler according to claim 3, characterized in that: The sealing piece (5) is an elastic sealing structure, and the end surface of the secondary sealing ring (4) facing away from the boiler body (1) is a transparent structure.

5. The highly sealed industrial boiler according to claim 1, characterized in that: The secondary sealing assembly includes a driven sealing ring (61), an active sealing ring (62) and an air transfer bag (7) in sequence along a direction close to the boiler body (1); the air transfer bag (7) is communicated with the air guide hole (41), and the active sealing ring (62) and the air transfer bag (7) are in contact with each other; the driven sealing ring (61) and the active sealing ring (62) are both interference-fitted with the outer wall of the pneumatic cavity (42) and the sealing port (21) or the sealing cover (22).

6. A highly sealed industrial boiler according to claim 5, characterized in that: The outer end of the sealing cover (22) is also fixedly connected to a limiting ring (8), the limiting ring (8) is located between the driven sealing ring (61) and the active sealing ring (62), and the mouth of the gas transfer hole (43) is located between the driven sealing ring (61) and the limiting ring (8).

7. A highly sealed industrial boiler according to claim 6, characterized in that: The distance between the limiting ring (8) and the gas transfer hole (43) is less than the thickness of the driven sealing ring (61), and the sum of the lengths of the active sealing ring (62) and the air transfer bag (7) after being fully compressed is greater than the distance between the end of the sealing port (21) and the inner wall of the pneumatic cavity (42) close to the boiler body (1).

8. A highly sealed industrial boiler according to claim 7, characterized in that: The ferry bag (7) comprises a reservoir end (71) and a reservoir end (72) connected between the reservoir end (71) and the inner wall of the pneumatic cavity (42); a through hole is drilled in the middle of the reservoir end (72), and two openings of the through hole are respectively connected to the reservoir end (71) and the air guide hole (41); a sealing plug (73) is provided in the through hole.

9. A highly sealed industrial boiler according to claim 8, characterized in that: The diameter of the sealing plug (73) is no greater than half the inner diameter of the air guide hole (41), and the sealing plug (73) is in compression contact with the inner wall of the through hole, and the reservoir end (71) is filled with compressed inert gas.

10. The highly sealed industrial boiler according to claim 9, characterized in that: The reservoir end (71) is an elastically compressible corrugated structure, the reservoir end (72) is a hard structure, and the sealing plug (73) is an elastic silicone rubber structure.

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