Packing sealing mechanism for soot blower of boiler flue

Abstract

The utility model discloses a packing sealing mechanism of a boiler flue soot blower, and belongs to the technical field of soot blowers. A packing sealing mechanism for a soot blower of a boiler flue comprises at least two sets of baffle rings of a circular ring structure, each baffle ring is provided with at least two semi-rings, a sealing ring is arranged in a sealing groove and used for sealing the circumferential faces of the baffle rings and the wall face of the flue, and a fixing piece used for fixing the baffle rings is arranged on the wall face of the flue. The outer wall of the sealing sleeve is fixedly connected with the inner wall of the sealing gasket, and the sealing gasket is located between the two sets of baffle rings; the baffle rings are designed to be of a split structure, the annular structure composed of the two semi-rings is arranged on the outer pipe of the soot blower in a sleeved mode, the baffle rings can be assembled and disassembled without disassembling the outer pipe of the soot blower in the disassembling process, assembling and disassembling are convenient, the padding is arranged between the adjacent baffle rings, the inner walls of the baffle rings and the outer wall of the outer pipe, sealing is convenient, and the sealing effect is good. Smoke leakage can be effectively relieved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of soot blower technology, and in particular to a packing sealing mechanism for a boiler flue soot blower. Background Technology

[0002] Boiler flue soot blowers are used to remove accumulated ash in boiler flues to maintain good heat transfer efficiency and reduce corrosion risks. Due to the movement characteristics of long telescopic steam soot blowers during the soot blowing process, a sealing device is installed between the outer tube of the soot blower and the flue wall to reduce the entry of external gas into the flue or the leakage of flue gas from the flue.

[0003] When the sealing device is used for a long time, the sealing packing ages, causing the sealing packing to condense together with soot and rust. This not only causes it to lose its sealing function but also makes it difficult to disassemble. Currently, the sealing packing is usually removed with a chisel, which is a relatively tight operation, but it is also easy to damage the outer tube of the sootblower and the wall of the flue, affecting subsequent use. Utility Model Content

[0004] The purpose of this utility model is to solve the problem in the prior art that the sealing packing is difficult to remove after aging, and to propose a packing sealing mechanism for boiler flue soot blowers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A boiler flue sootblower packing sealing mechanism includes: at least two sets of retaining rings in a circular ring structure, each retaining ring having at least two semi-rings, wherein a sealing groove is formed on the circumferential surface of the retaining ring, and a sealing ring is provided in the sealing groove for sealing the circumferential surface of the retaining ring with the flue wall, and a fixing member is provided on the flue wall for fixing the retaining ring; and packing for sealing the retaining rings and the outer tube of the sootblower, wherein the packing has a sealing sleeve in a sleeve-like structure and a sealing gasket in a circular ring structure, the outer wall of the sealing sleeve is fixedly connected to the inner wall of the sealing gasket, the inner wall and the outer wall of the sealing sleeve respectively abut against the outer wall of the sootblower outer tube and the inner wall of the retaining ring, and the sealing gasket is located between the two sets of retaining rings.

[0007] To improve the connection between the two semi-rings, preferably, the two semi-rings are a first semi-ring and a second semi-ring. The outer walls of both ends of the first semi-ring are fixedly provided with symmetrically distributed baffles, and the outer walls of both ends of the second semi-ring are provided with symmetrically distributed grooves. The baffles are slidably connected to the corresponding grooves, and the inner walls of the baffles abut against the inner walls of the grooves.

[0008] Preferably, the wall thickness of the retaining ring is in the range of 5-30 mm.

[0009] To improve the sealing effect, preferably, the outer diameter of the retaining ring is smaller than the outer diameter of the sealing gasket.

[0010] To reduce interference between the two sets of sealing sleeves, preferably, the length of the sealing sleeve extending into the retaining ring is less than half the wall thickness of the retaining ring.

[0011] Preferably, the fixing member includes a fixing ring, and a protruding ring is fixedly provided on the inner wall of the fixing ring. The end face of the protruding ring away from the fixing ring abuts against the outer wall of a set of retaining rings close to the fixing ring, and the fixing ring is detachably connected to the flue wall by bolts.

[0012] Compared with the prior art, this utility model provides a packing sealing mechanism for a boiler flue soot blower, which has the following advantages:

[0013] 1. The packing sealing mechanism of this boiler flue soot blower is designed with a split structure for the retaining ring, which has at least two half rings. The circular structure composed of the two half rings is fitted onto the outer tube of the soot blower. The retaining ring can be installed and removed without removing the outer tube of the soot blower during disassembly. It has the advantages of simple structure and convenient installation and disassembly. Moreover, the packing is placed between adjacent retaining rings and on the inner wall of the retaining ring and the outer wall of the outer tube, which facilitates sealing and can effectively reduce flue gas leakage and increase the service life of the equipment.

[0014] 2. The packing sealing mechanism of the boiler flue soot blower, by setting a baffle on the first half ring and opening a groove on the second half ring, can reduce the movement of the first half ring and the second half ring along the axial direction when the first half ring and the second half ring are closed, thereby improving the performance.

[0015] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model designs the retaining ring as a split structure with at least two half-rings. The circular structure composed of the two half-rings is fitted onto the outer tube of the sootblower. During disassembly, the outer tube of the sootblower can be removed to complete the assembly and disassembly of the retaining ring. It has the advantages of simple structure and convenient assembly and disassembly. Moreover, the packing is placed between adjacent retaining rings and on the inner wall of the retaining ring and the outer wall of the outer tube, which facilitates sealing, effectively reduces flue gas leakage, and increases the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a boiler flue soot blower packing sealing mechanism proposed in this utility model;

[0017] Figure 2 This utility model proposes a packing sealing mechanism for a boiler flue soot blower. Figure 1 Enlarged view of section A;

[0018] Figure 3 A schematic diagram of the retaining ring structure of the packing sealing mechanism for a boiler flue soot blower proposed in this utility model. Figure 1 ;

[0019] Figure 4A schematic diagram of the retaining ring structure of the packing sealing mechanism for a boiler flue soot blower proposed in this utility model. Figure 2 .

[0020] In the diagram: 1. First half-ring; 101. Baffle; 2. Second half-ring; 201. Groove; 3. Sealing groove; 4. Sealing sleeve; 401. Sealing gasket; 5. Sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example:

[0024] Reference Figures 1-4A boiler flue sootblower packing sealing mechanism includes: at least two sets of retaining rings in a circular structure; here, three sets of retaining rings are provided, each retaining ring having at least two half-rings, the two half-rings being equally spaced. A sealing groove 3 is formed on the circumferential surface of the retaining ring, and a sealing ring 5 is provided within the sealing groove 3 for sealing the circumferential surface of the retaining ring against the flue wall. The sealing ring 5 is made of polytetrafluoroethylene (PTFE) reinforced material. Although the temperature resistance range of pure PTFE is -180°C to +260°C, its mechanical strength and temperature resistance can be improved by adding glass fiber or other reinforcing materials. Fixing members, such as bolts, are provided on the flue wall for fixing the retaining rings. Alternatively, a locking block can be used to fix the retaining ring to the flue wall. Here, we prefer to design the fixing component as a fixing ring, with a protruding ring fixedly installed on the inner wall of the fixing ring. The end face of the protruding ring away from the fixing ring abuts against the outer wall of a set of retaining rings close to the fixing ring, and the fixing ring is disassembled and connected to the flue wall by bolts, thus fixing the retaining ring in the flue wall. Moreover, the fixing ring is sleeved on the outer wall of the sootblower outer tube, improving the performance. The packing used to seal the retaining ring and the sootblower outer tube is made of flexible graphite, expanded graphite gasket, or ceramic fiber, preferably expanded graphite gasket, which is made of natural flake graphite through special treatment and has excellent heat resistance, corrosion resistance, and compression resilience. It can withstand very high temperatures and pressures and has good resistance to most chemicals; the packing has a sleeve-shaped sealing sleeve 4 and an annular sealing gasket 401. The outer wall of the sealing sleeve 4 is fixedly connected to the inner wall of the sealing gasket 401. The wall thickness of the sealing sleeve 4 and the sealing gasket 401 is the same. In use, the inner and outer walls of the sealing sleeve 4 abut against the outer wall of the sootblower outer tube and the inner wall of the retaining ring, respectively, and the sealing gasket 401 is located between two sets of retaining rings, that is, the sealing gasket 401 is located between two sets of adjacent retaining rings. The two end faces of 401 abut against the side wall of the retaining ring. In order to improve the sealing effect between two adjacent sets of retaining rings, the outer diameter of the retaining ring is smaller than the outer diameter of the sealing gasket 401. During use, a stepped hole is opened on the flue wall. The outer tube of the soot blower is slidably installed in the stepped hole. Multiple sets of retaining rings are installed in the stepped hole. The side wall of the innermost retaining ring abuts against the stepped surface in the stepped hole. The outermost retaining ring's outer wall and the end face of the convex ring away from the fixed ring are then fixed to the flue wall with bolts. It is easy to install and remove, reliable to fix, and has a reliable sealing effect, thus improving the performance.

[0025] In use, the retaining ring is designed as a split structure with at least two half-rings. The circular structure formed by the two half-rings is fitted onto the outer tube of the sootblower. During disassembly, the retaining ring can be installed and removed without removing the outer tube of the sootblower. It has the advantages of simple structure and convenient installation and disassembly. Moreover, the packing is placed between adjacent retaining rings and on the inner wall of the retaining ring and the outer wall of the outer tube, which facilitates sealing, effectively reduces flue gas leakage, and increases the service life of the equipment.

[0026] Reference Figure 3 and Figure 4 Here, we refer to the two semi-rings as the first semi-ring 1 and the second semi-ring 2. Symmetrically distributed baffles 101 are fixedly installed on the outer walls of both ends of the first semi-ring 1. Symmetrically distributed grooves 201 are opened on the outer walls of both ends of the second semi-ring 2. The baffles 101 are slidably connected to the corresponding grooves 201, and the inner walls of the baffles 101 and grooves 201 abut against each other. In use, by setting baffles 101 on the first semi-ring 1 and opening grooves 201 on the second semi-ring 2, when the first semi-ring 1 and the second semi-ring 2 are closed, the axial movement of the first semi-ring 1 and the second semi-ring 2 can be reduced, improving the performance.

[0027] Reference Figure 3 and Figure 4 The wall thickness of the retaining ring is in the range of 5-30mm. Here, we prefer 20mm. Moreover, the length of the sealing sleeve 4 extending into the retaining ring is less than half of the wall thickness of the retaining ring, which can reduce the interference between two adjacent sealing sleeves 4 and improve the performance.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A packing sealing mechanism for a boiler flue soot blower, characterized in that, include: At least two sets of retaining rings in a circular structure, each retaining ring having at least two semi-rings. The circumferential surface of the baffle ring is provided with a sealing groove (3), and a sealing ring (5) is provided in the sealing groove (3) for sealing the circumferential surface of the baffle ring and the flue wall. A fixing member for fixing the baffle ring is provided on the flue wall. Packing material used for sealing retaining rings and soot blower outer tubes. The packing has a sleeve-shaped sealing sleeve (4) and a ring-shaped sealing gasket (401). The outer wall of the sealing sleeve (4) is fixedly connected to the inner wall of the sealing gasket (401). The inner wall and outer wall of the sealing sleeve (4) abut against the outer wall of the soot blower tube and the inner wall of the retaining ring, respectively. The sealing gasket (401) is located between the two sets of retaining rings.

2. The boiler flue soot blower packing sealing mechanism according to claim 1, characterized in that, The two semi-rings are a first semi-ring (1) and a second semi-ring (2). The outer walls of both ends of the first semi-ring (1) are fixedly provided with baffles (101) that are symmetrically distributed. The outer walls of both ends of the second semi-ring (2) are provided with grooves (201) that are symmetrically distributed. The baffles (101) are slidably connected to the corresponding grooves (201), and the inner wall of the baffles (101) abuts against the inner wall of the grooves (201).

3. The boiler flue soot blower packing sealing mechanism according to claim 1, characterized in that, The wall thickness of the retaining ring is in the range of 5-30mm.

4. The boiler flue soot blower packing sealing mechanism according to claim 1, characterized in that, The outer diameter of the retaining ring is smaller than the outer diameter of the sealing gasket (401).

5. The boiler flue soot blower packing sealing mechanism according to claim 1, characterized in that, The length of the sealing sleeve (4) extending into the retaining ring is less than half the wall thickness of the retaining ring.

6. The boiler flue soot blower packing sealing mechanism according to claim 1, characterized in that, The fixing component includes a fixing ring, and a protruding ring is fixedly provided on the inner wall of the fixing ring. The end face of the protruding ring away from the fixing ring abuts against the outer wall of a set of retaining rings close to the fixing ring, and the fixing ring is detachably connected to the flue wall by bolts.

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