Hot air door shaft sealing structure

Abstract

The utility model discloses a hot air door shaft sealing structure which comprises a hot air door shaft, a hot air door outer wall, a spring, a sealing ring, a base fixing ring, a static ring, a comb type movable ring, a comb type pressure ring and a sealing shell. The static ring, the comb-type movable ring and the comb-type pressure ring are connected in a multi-layer matched mode, and sealing rings are arranged at multiple positions to form multiple sealing guarantees, so that hot air leakage is effectively prevented, and sealing reliability is improved. The structure design is simple, installation and maintenance are convenient, and maintenance cost and downtime are reduced. The lengths of the sealing shell and the spring can be adjusted according to the length of the hot air door shaft, and universality and flexibility are improved to meet requirements of equipment of different specifications. During installation, all the components are assembled and fixed in sequence, and all the components are tightly attached through the springs during equipment operation, so that the sealing effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of a sealing device, in particular to a hot air door shaft sealing structure. Background Art

[0002] The hot air door shaft sealing structure is mainly applied to a hot air regulating door to prevent hot air leakage. The hot air regulating door plays a role in regulating the medium flow in the boiler flue gas pipeline. During the adjustment process, the displacement of its door shaft will cause sealing problems. At present, the packing is generally used for sealing the hot air door shaft. However, due to the high temperature in the boiler flue gas pipeline, the packing is extremely easy to be thermally embrittled and lose elasticity, unable to compensate for the gap generated by the displacement of the door shaft, resulting in hot air leakage. Hot air leakage will bring a series of adverse consequences, such as dust flying at the site, generating noise, increasing energy consumption, and being prone to scalding accidents during maintenance without shutdown. This not only affects the working efficiency of the system, but also may cause energy waste and environmental pollution. Due to improper material selection or unreasonable design of the common sealing structure, it is easy to age and wear rapidly in the high-temperature and high-pressure working environment, shortening the service life of the sealing structure. Moreover, the traditional sealing structure is relatively complex, and both installation and maintenance are more difficult, increasing the production cost and operation burden of the enterprise. In addition, due to the poor sealing effect, dust, impurities, etc. may enter the system, affecting the normal operation of the equipment and increasing the risk of equipment failure. Content of the Utility Model

[0003] The purpose of the utility model is to provide a hot air door shaft sealing structure. Through the multi-layer cooperative connection of a static ring, a comb-shaped moving ring, and a comb-shaped pressure ring, and by arranging sealing rings at key positions, multiple sealing guarantees are formed, which can more effectively prevent hot air leakage and improve the reliability of sealing.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A hot air door shaft sealing structure includes a hot air door shaft (1), an outer wall of the hot air door (2), a spring (7), and several sealing rings. It is characterized by further including a base fixing ring (3), a static ring (4), a comb-shaped moving ring (5), a comb-shaped pressure ring (6), and a sealing shell (8);

[0006] The top and side of the static ring (4) are both provided with grooves. Sealing rings are arranged in the grooves, and the static ring (4) is correspondingly installed inside the base fixing ring (3). An annular groove is provided at the bottom end of the static ring (4), and the annular groove is in fit connection with the annular protrusion at the top end of the comb-shaped moving ring (5);

[0007] At the bottom end of the comb-shaped moving ring (5) and the top end of the comb-shaped pressure ring (6), there are multiple layers of comb-shaped convex structures that are adapted to each other, and the corresponding mating connection is achieved by means of the multiple layers of comb-shaped convex structures; at the bottom end of the comb-shaped pressure ring (6), there is a spring slot, in which a spring (7) is installed, and the other end of the spring (7) is installed at the convex part inside the bottom surface of the sealing housing (8). By applying pressure to the spring, the flange edge of the sealing housing (8) is closely attached to the flange edge of the base fixing ring (3), and then through the bolt (81) passing through the flange edges of the sealing housing (8) and the base fixing ring (3), it is firmly fixed to the outer wall (2) of the hot air door.

[0008] The hot air door shaft (1) sequentially passes through the outer wall (2) of the hot air door, the base fixing ring (3), the stationary ring (4), the comb-shaped moving ring (5), and the comb-shaped pressure ring (6), and is wrapped on the outside by the sealing housing (8).

[0009] In the inner circumferential wall of the comb-shaped moving ring (5), there is a groove, and a sealing ring (51) is placed in the groove.

[0010] The flange edges of the sealing housing (8) and the base fixing ring (3) are both provided with threaded holes, and the positions of the threaded holes correspond to each other. The sealing housing (8) and the base fixing ring (3) are fixed to the outer wall (2) of the hot air door by passing through the bolt (81).

[0011] The lengths of the sealing housing (8) and the spring (7) are adjusted according to the length of the hot air door shaft (1).

[0012] In practical applications, first determine the appropriate lengths of the sealing housing (8) and the spring (7) according to the length of the hot air door shaft (1). Place the sealing rings in the grooves at the top and side of the stationary ring (4) and the grooves on the inner wall of the comb-shaped moving ring (5). Then, install the stationary ring (4) inside the base fixing ring (3) so that the sealing rings in its grooves are in close contact with the base fixing ring (3) to achieve good sealing. The annular groove at the bottom of the stationary ring (4) is accurately fitted and connected with the annular protrusion at the top of the comb-shaped moving ring (5). Next, connect the bottom end of the comb-shaped moving ring (5) with the multi-layer comb-shaped protrusion structures at the top of the comb-shaped pressure ring (6) in a corresponding manner. Install the spring (7) in the spring slot at the bottom of the comb-shaped pressure ring (6), and the other end of the spring (7) is installed on the protrusion inside the bottom surface of the sealing housing (8). After that, pass the hot air door shaft (1) through the outer wall of the hot air door (2), the base fixing ring (3), the stationary ring (4), the comb-shaped moving ring (5), and the comb-shaped pressure ring (6) in sequence, and then wrap it with the sealing housing (8) on the outside. Align the flange edge of the sealing housing (8) with the flange edge of the base fixing ring (3) to ensure that the positions of the threaded holes of the two correspond. Pass bolts (81) through these threaded holes to firmly fix the sealing housing (8) and the base fixing ring (3) on the outer wall of the hot air door (2). During the operation of the device, the elastic force of the spring (7) acts on the comb-shaped pressure ring (6), making components such as the comb-shaped moving ring (5) and the stationary ring (4) fit closely, effectively ensuring the sealing effect.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] Through the multi-layer coordinated connection of the stationary ring, the comb-shaped moving ring, and the comb-shaped pressure ring, multiple sealing guarantees are formed, which can more effectively prevent hot air leakage and improve the reliability of sealing.

[0015] The structural design is relatively simple, and the installation steps are clear and definite. During actual maintenance, it is also relatively convenient to replace the sealing rings or individual components, reducing the maintenance cost and downtime.

[0016] The versatility and flexibility of this sealing structure are increased, which can meet the requirements of equipment with different specifications. The lengths of the sealing housing and the spring can be adjusted according to the length of the hot air door shaft. Description of the Drawings

[0017] Figure 1 It is a three-dimensional cross-sectional view of a sealing structure for a hot air door shaft of the present utility model;

[0018] Figure 2 It is a three-dimensional cross-sectional view of a sealing structure for a hot air door shaft of the present utility model;

[0019] Figure 3 It is an exploded three-dimensional cross-sectional view of a sealing structure for a hot air door shaft of the present utility model;

[0020] Figure 4 Exploded perspective cross-sectional view of a hot air door shaft sealing structure of the present utility model;

[0021] Figure 5 Exploded perspective view of a hot air door shaft sealing structure of the present utility model;

[0022] Figure 6 Perspective assembly view of a hot air door shaft sealing structure of the present utility model;

[0023] In the figure: 1, hot air door shaft; 2, outer wall of hot air door; 3, base fixing ring; 4, stationary ring; 5, comb-shaped moving ring; 6, comb-shaped pressure ring; 7, spring; 8, sealing housing; 41, top sealing ring of stationary ring; 42, side sealing ring of stationary ring; 51, inner ring wall sealing ring of comb-shaped moving ring; 81, bolt. Specific implementation method

[0024] Next, the technical solutions in the embodiments of the present utility model will be completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0025] As shown in the figure, a hot air door shaft sealing structure includes a hot air door shaft (1), an outer wall of the hot air door (2), a spring (7), and several sealing rings. It is characterized in that it further includes a base fixing ring (3), a stationary ring (4), a comb-shaped moving ring (5), a comb-shaped pressure ring (6), and a sealing housing (8);

[0026] The top and side of the stationary ring (4) are both provided with grooves, and sealing rings are placed in the grooves, and the stationary ring (4) is correspondingly installed inside the base fixing ring (3). The bottom end of the stationary ring (4) is provided with an annular groove, and the annular groove is in mating connection with the annular protrusion at the top of the comb-shaped moving ring (5);

[0027] The bottom end of the comb-shaped moving ring (5) and the top end of the comb-shaped pressure ring (6) are provided with mutually adapted multi-layer comb-shaped protrusion structures, and the corresponding mating connection is achieved by means of the multi-layer comb-shaped protrusion structures; a spring slot is provided at the bottom end of the comb-shaped pressure ring (6), and a spring (7) is installed therein. The other end of the spring (7) is installed at the protruding part inside the bottom surface of the sealing housing (8). The sealing housing (8) applies pressure to the spring to make its flange closely fit the flange of the base fixing ring (3), and then the bolt (81) passes through the flange of the sealing housing (8) and the base fixing ring (3) and is firmly fixed to the outer wall of the hot air door (2).

[0028] The hot air door shaft (1) sequentially passes through the outer wall of the hot air door (2), the base fixing ring (3), the stationary ring (4), the comb-shaped moving ring (5), and the comb-shaped pressure ring (6), and the sealing housing (8) is wrapped on the outside.

[0029] The inner ring wall of the comb-shaped moving ring (5) is provided with a groove, and a sealing ring (51) is placed in the groove.

[0030] The flange edges of the sealing housing (8) and the base fixing ring (3) are both provided with threaded holes, and the positions of the threaded holes correspond to each other. The sealing housing (8) and the base fixing ring (3) are fixed to the outer wall (2) of the hot air door by bolts (81) passing through.

[0031] The lengths of the sealing housing (8) and the spring (7) are adjusted according to the length of the hot air door shaft (1).

[0032] In practical applications, first, determine the appropriate lengths of the sealing housing (8) and the spring (7) according to the length of the hot air door shaft (1). Place the sealing ring in the grooves at the top and side of the stationary ring (4) and the groove on the inner ring wall of the comb-shaped moving ring (5). Then, install the stationary ring (4) inside the base fixing ring (3) so that the sealing ring in its groove is in close contact with the base fixing ring (3) to achieve good sealing. The annular groove at the bottom end of the stationary ring (4) is accurately fitted and connected with the annular protrusion at the top end of the comb-shaped moving ring (5). Next, connect the bottom end of the comb-shaped moving ring (5) with the multi-layer comb-shaped protrusion structures at the top end of the comb-shaped pressure ring (6) correspondingly. Install the spring (7) in the spring slot at the bottom end of the comb-shaped pressure ring (6), and the other end of the spring (7) is installed on the protrusion inside the bottom surface of the sealing housing (8). Then, pass the hot air door shaft (1) through the outer wall (2) of the hot air door, the base fixing ring (3), the stationary ring (4), the comb-shaped moving ring (5), and the comb-shaped pressure ring (6) in sequence, and then wrap it with the sealing housing (8) on the outside. Align the flange edge of the sealing housing (8) with the flange edge of the base fixing ring (3) to ensure that the positions of their threaded holes correspond. Pass bolts (81) through these threaded holes to firmly fix the sealing housing (8) and the base fixing ring (3) on the outer wall (2) of the hot air door. During the operation of the equipment, the elastic force of the spring (7) acts on the comb-shaped pressure ring (6), making components such as the comb-shaped moving ring (5) and the stationary ring (4) fit tightly, effectively ensuring the sealing effect.

Claims

1. A hot air door shaft sealing structure, comprising a hot air door shaft (1), a hot air door outer wall (2), a spring (7), and a plurality of sealing rings, characterized in that It also includes a base fixing ring (3), a static ring (4), a comb-type dynamic ring (5), a comb-type pressure ring (6), and a sealing shell (8); The top and side of the stationary ring (4) are both provided with grooves, a sealing ring is placed in the groove, and the stationary ring (4) is installed on the inner side of the base fixing ring (3) correspondingly, and the bottom of the stationary ring (4) is provided with an annular groove, and the annular groove is matched with the annular protrusion at the top of the comb-type dynamic ring (5) to achieve a connection; The bottom end of the comb-type dynamic ring (5) and the top end of the comb-type pressure ring (6) are provided with mutually matching multi-layer comb-type protrusion structures, and a corresponding matching connection is achieved with the help of the multi-layer comb-type protrusion structure; the bottom end of the comb-type pressure ring (6) is provided with a spring slot, in which a spring (7) is installed, and the other end of the spring (7) is installed on the protrusion inside the bottom surface of the sealing shell (8). The sealing shell (8) applies pressure to the spring so that its own flange edge is tightly fitted to the flange edge of the base fixing ring (3), and then the bolts (81) pass through the flange edges of the sealing shell (8) and the base fixing ring (3) to firmly fix it to the outer wall (2) of the hot air door.

2. A hot air door shaft sealing structure according to claim 1, characterized in that: The hot air door shaft (1) passes through the hot air door outer wall (2), the base fixing ring (3), the static ring (4), the comb-type dynamic ring (5), and the comb-type pressure ring (6) in sequence, and is wrapped on the outside with a sealing shell (8).

3. The hot air door shaft sealing structure according to claim 1, characterized in that: The inner wall of the comb-type dynamic ring (5) is provided with a groove, and a sealing ring (51) is placed in the groove.

4. The hot air door shaft sealing structure according to claim 1, characterized in that: The flange edge of the sealing shell (8) and the flange edge of the base fixing ring (3) are both provided with threaded holes, and the positions of the threaded holes correspond to each other. Bolts (81) are passed through to fix the sealing shell (8) and the base fixing ring (3) to the outer wall (2) of the hot air door.

5. The hot air door shaft sealing structure according to claim 1, characterized in that: The lengths of the sealing shell (8) and the spring (7) are adjusted according to the length of the hot air door shaft (1).

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