CN116241903A - A light manhole device suitable for high temperature combustion chamber - Google Patents

Abstract

The invention discloses a light-duty manhole device suitable for a high-temperature combustion chamber, which belongs to the technical field of maintenance devices for a combustion chamber. The outer layer and the middle layer are connected with the refractory layer. The manhole device includes a pipe ring group, a fire baffle and a manhole cover. The pipe ring group includes a first pipe ring, a second pipe ring and a plurality of hollow air ducts. A first cavity is provided inside the pipe ring, a second cavity is provided inside the second pipe ring, a third cavity is provided inside the air duct, the first cavity communicates with the second cavity through the third cavity, and the pipe ring The group is connected with an air inlet and an air outlet, and the air entering the air inlet is discharged from the air outlet after exchanging heat with the pipe ring group in the three cavities. The air-cooled pipe ring group of the manhole device of the present invention has forced cooling and ventilation inside, which reduces the selection of materials and lowers the manufacturing cost; the heat conduction through the steel is also greatly reduced, which can effectively reduce the external temperature of the manhole device.

Description

A light manhole device suitable for high temperature combustion chamber

technical field

The invention belongs to the technical field of combustion chamber maintenance devices, and in particular relates to a light manhole device suitable for high-temperature combustion chambers.

Background technique

my country is a big manufacturing country, most of the energy utilization in all walks of life is inseparable from the energy conversion process of high-temperature combustion, and the combustion chamber of the combustion equipment is in a high-temperature state (above 1000°C) for a long time, and needs to be shut down for maintenance regularly, so high-temperature maintenance personnel must be equipped hole device. This device is required to be able to withstand long-term high temperature conditions, and requires excellent heat insulation performance.

At present, in order to ensure the performance of the common manhole device in high temperature environment, heat-resistant steel is mostly used in the selection of materials, and thermal insulation and refractory concrete are poured on the inside. In terms of heat insulation effect, only the high temperature heat dissipation loss at the door cover accumulates more, which is not conducive to energy saving.

Therefore, the research and development of a light-duty manhole device suitable for high-temperature combustion chambers with common materials, high temperature resistance, long service life, good heat insulation effect, and lightness not only has economic benefits, but also has certain social benefits. Make corresponding contributions to energy saving and emission reduction.

Contents of the invention

Technical problem: In view of the above problems in the prior art, the technical problem to be solved by the present invention is to provide a light-weight manhole device suitable for high-temperature combustion chambers to solve the problem of high surface temperature and large heat dissipation loss of the current manhole device. The bulk material is easy to be carbonized at high temperature and the whole device is bulky after long-term use.

Technical solution: In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is as follows:

A light-weight manhole device suitable for high-temperature combustion chambers. The wall of the high-temperature combustion chamber includes a refractory layer, a middle layer and an outer layer arranged from the inside to the outside. The manhole device runs through the outer layer and the middle layer and is connected to the The fire-resistant layer is connected, the manhole device includes a pipe ring group for forming a manhole passage, a fire baffle for blocking the inside of the manhole passage, and a manhole cover for sealing the outside of the manhole passage, The pipe ring set includes a first pipe ring, a second pipe ring and a plurality of hollow air ducts connecting the first pipe ring and the second pipe ring, a first cavity is provided inside the first pipe ring, A second cavity is provided inside the second pipe ring, a third cavity is provided in the air duct, the first cavity communicates with the second cavity through the third cavity, and the pipe ring The group is connected with an air inlet and an air outlet, and the air entering the air inlet exchanges heat with the pipe ring group in the three cavities and then is discharged from the air outlet.

Preferably, the tube ring set is covered with a cylinder.

Preferably, the barrel is provided with a plurality of hollow holes.

Preferably, a heat insulation layer is provided on the outer side of the cylinder.

Preferably, the air inlet is arranged at one end of the second pipe ring, and the air outlet is arranged at the other end of the second pipe ring.

Preferably, the second cavity is provided with a sealing plate to block the passage from the air inlet to the air outlet, and the air entering the air inlet enters the first cavity from the second cavity and is discharged from the second cavity .

Preferably, the refractory layer is provided with a refractory brick ring, and the refractory brick ring is provided with a first annular groove corresponding to the fire baffle, and the fire baffle and the first annular groove form a Sealing surface.

Preferably, the refractory brick ring is provided with a second ring groove corresponding to the first pipe ring.

Preferably, there is a gap between the fire baffle plate and the inner wall of the pipe ring set.

Preferably, the manhole cover is connected to the outer layer, and the manhole cover includes a cover plate.

Beneficial effect: compared with the prior art, the present invention has the following advantages:

1. The air-cooled pipe ring group of the manhole device is composed of upper and lower pipe rings, which are supported and fixed by multiple air pipes. Due to the heat radiation from the high temperature side of the combustion chamber, the heat is conducted to the low temperature surface of the manhole device through the metal material. Since the temperature conduction inside the material is not affected by the thermal insulation material inside the device, the temperature of the part where the surface of the similar device is in contact with the metal of the cylinder is still relatively high. However, the air-cooled pipe ring group of the manhole device of the present invention has forced cooling and ventilation inside. It can directly take away the heat from the metal surface, greatly reduce the metal surface temperature, and cut off the heat conduction of the metal, thereby directly reducing the surface temperature of the manhole device and reducing the loss of surface heat dissipation. The reduction of the metal temperature also greatly improves the service life of the material and reduces the material. Steps are selected, and the metal materials of the entire device are all made of carbon steel, and the manufacturing cost is low;

2. The outer side of the pipe ring group is wrapped with a cylinder, which is made of expanded steel mesh. Compared with the conventional steel plate cylinder, the weight and surface area are greatly reduced, and the corresponding heat conduction through the steel is also greatly reduced, which can effectively reduce the labor force. Surface temperature of hole device;

3. The outer heat insulation layer of the cylinder plays the role of heat insulation of the cylinder body. The heat insulation layer is made of aluminum silicate insulation blanket, which is used as a heat preservation sealing material filler. The material is commonly used, light in texture, and easy to install and replace.

4. The high-temperature side of the light-duty manhole device is equipped with refractory brick rings and fire baffles of matching design. The refractory brick rings are integrally poured with high-temperature-resistant high-alumina concrete, and the fire baffles are made of zirconium-containing ceramic fibers, which are light in texture and resistant to high temperatures. Easy to assemble and disassemble.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the structure of the rectangular tube ring group;

Fig. 3 is a schematic diagram of a section structure of a refractory brick ring;

Figure 4 is an enlarged view of A in Figure 1;

Fig. 5 is a structural schematic diagram of the expanded state of the cylinder.

Detailed ways

Below in conjunction with specific examples, further illustrate the present invention, the examples are implemented under the premise of the technical solutions of the present invention, it should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in Figure 1, Figure 3 and Figure 4, a light manhole device suitable for high-temperature combustion chambers, the wall of the high-temperature combustion chamber includes a refractory layer 1, an intermediate layer 2 and an outer layer 3 arranged from the inside to the outside, and the fire-resistant Layer 1 is generally made of high-temperature-resistant high-aluminum refractory concrete, the middle layer 2 is made of perlite thermal insulation concrete, and the outer layer 3 is made of carbon steel coils. The manhole device runs through the outer layer 3 and the middle layer 2 and connects with the refractory layer 1. The manhole device includes a refractory brick ring 11, a fire baffle plate 5, a pipe ring group 4 and a manhole cover 6 arranged from the inside to the outside, and the refractory brick ring 11. The high-temperature high-alumina concrete is integrally cast in a ring shape, which is installed on the refractory layer 1. The manhole channel 9 is formed in the middle of the pipe ring group 4. The manhole channel 9 is a passage for personnel to enter and exit; the fire baffle 5 is made of zirconium-containing ceramics The fiber machine-made board is light in texture and high in strength. The outer side of the refractory brick ring 11 is provided with a first ring groove 111 corresponding to the fire baffle 5. When in use, the fire baffle 5 is closely attached to the first ring groove 111 to form a seal for Seal the inner side of the manhole channel 9 to separate the manhole channel 9 from the combustion chamber. Since the fire baffle 5 is made of zirconium-containing ceramic fiber machine-made board, the heat insulation effect is good, and the outer diameter of the fire baffle 5 is smaller than that of the pipe ring group 4 Therefore, there is a gap between the fire baffle 5 and the inner wall of the pipe ring group 4. For maintenance, the fire baffle 5 can be directly taken out from the manhole channel 9, which is convenient and concise; the manhole cover 6 is used for sealing the manhole Outside the hole channel 9, the manhole cover 6 includes a cover plate 61 and a cover body 62, the cover body 62 is welded to the steel plate of the outer layer 3, the cover plate 61 and the cover body 62 are connected by bolts, and the cover plate 61 and the cover body 62 are connected by bolts. It is matched with customized asbestos rubber plate gaskets to increase the sealing performance of the flange sealing surface. The cover plate 61 is light in weight and easy to disassemble.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the pipe ring set 4 includes a first pipe ring 41, a second pipe ring 42 and a plurality of hollow wind pipes connecting the first pipe ring 41 and the second pipe ring 42. The pipe 43, the first pipe ring 41 and the second pipe ring 42 are all coiled by rectangular hollow steel pipes, the air pipe 43 is made of hollow rectangular steel pipes, and the two pipe rings are connected to form a cylindrical shape, and the cylindrical pipe ring group 4. A manhole channel 9 for people to enter and exit is formed in the middle. The first pipe ring 41 is located on the inner side. The refractory brick ring 11 is provided with a second ring groove 112 corresponding to the first pipe ring 41. On the second ring groove 112 and between the two, smear refractory cement to seal. The inside of the first pipe ring 41 is provided with a first cavity, the inside of the second pipe ring 42 is provided with a second cavity, and the inside of the air duct 43 is provided with a third cavity, and the first cavity passes through the third cavity and the second cavity. One end of the second pipe ring 42 is provided with an air inlet 71, and the other end of the second pipe ring 42 away from the air inlet 71 is provided with an air outlet 72. The air inlet 71 enters the airflow in the three cavities and the pipe ring group 4 After heat exchange, it is discharged from the air outlet 72, and the air entering the air can use the cold air from the outlet of the combustion blower, no additional air source is needed, and the air is supplied synchronously with the combustion, and the second cavity is equipped with a sealing plate to block the passage from the air inlet 71 to the air outlet 72 421, two sealing plates 421 are provided, one is arranged at the inner upper end of the second pipe ring 42, and the other is arranged at the inner lower end of the second pipe ring 42, which divides the ring-shaped second cavity into two semicircular cavities. Under the action of the sealing plate 421, the airflow entering the air inlet 71 cannot directly reach the air outlet 72 in the annular second cavity, and the airflow entering the air inlet 71 passes from the second cavity through a plurality of third chambers communicating with the left semicircular cavity. The cavity enters the first cavity, and then returns to the second cavity from multiple third cavities connected to the semicircular cavity on the right to discharge. The air-cooling channel is extended and the heat exchange effect is good. The metal surface temperature of the ring group is still low in a high-temperature environment, and the metal strength has not dropped significantly. The strength of the entire rectangular tube ring group is relatively high, and there will be no risk of surface high-temperature carbonization for long-term use.

As shown in Fig. 1, Fig. 4 and Fig. 5, the pipe ring group 4 is provided with a cylindrical body 8, and the cylindrical body 8 is provided with a plurality of hollow holes 81, and the cylindrical body 8 is wound by steel mesh, and the cylindrical body 8 can be To strengthen the structural strength of the pipe ring group 4, while strengthening the strength of the entire pipe ring group 4, it is also convenient for the outer side to carry out heat preservation work, and the heat insulation layer 82 is added. And because the cylinder 8 made of expanded metal mesh has a greatly reduced circumferential cross-sectional area compared with that of a conventional cylinder made of a whole steel plate, the heat conduction between metals is also greatly reduced. There is also a heat insulation layer 82 on the outside of the cylinder body 8. The heat insulation layer 82 is made of aluminum silicate fiber insulation blanket, and the aluminum silicate fiber insulation blanket is used as a heat preservation and sealing filler outside the cylinder body 8. , lightweight, easy to install and replace.

The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as protection scope of the present invention.

Claims (10)

1. A light-duty manhole device suitable for high-temperature combustion chambers, said high-temperature combustion chamber wall body comprising a refractory layer (1), intermediate layer (2) and outer layer (3) arranged from inside to outside, characterized in that , the manhole device runs through the outer layer (3) and the middle layer (2) and is connected to the refractory layer (1), and the manhole device includes a pipe ring group for forming a manhole channel (9) (4), the fire baffle (5) used to block the inside of the manhole passage (9) and the manhole cover (6) used to cover the outside of the manhole passage (9), the pipe ring group ( 4) comprising a first pipe ring (41), a second pipe ring (42) and a plurality of hollow air ducts (43) connecting the first pipe ring (41) and the second pipe ring (42), the The inside of the first pipe ring (41) is provided with a first cavity, the inside of the second pipe ring (42) is provided with a second cavity, and the inside of the air pipe (43) is provided with a third cavity. A cavity communicates with the second cavity through the third cavity, and the pipe ring group (4) is connected with an air inlet (71) and an air outlet (72), and the air inlet (71) enters the airflow The three cavities are discharged from the air outlet (72) after exchanging heat with the pipe ring group (4). 2. The light-duty manhole device suitable for high-temperature combustion chambers according to claim 1, characterized in that, a cylindrical body (8) is set outside the pipe ring group (4). 3. The light-duty manhole device suitable for high-temperature combustion chambers according to claim 2, characterized in that, the cylinder body (8) is provided with a plurality of hollow holes (81). 4. The light-duty manhole device suitable for high-temperature combustion chambers according to claim 2, characterized in that a heat insulating layer (82) is provided on the outside of the cylinder (8). 5. The light-duty manhole device suitable for high-temperature combustion chamber according to claim 1, characterized in that, the air inlet (71) is arranged at one end of the second pipe ring (42), and the air outlet ( 72) is arranged at the other end of the second pipe ring (42). 6. The light-duty manhole device suitable for high-temperature combustion chambers according to claim 5, characterized in that, the second cavity is provided with a channel for blocking the passage from the air inlet (71) to the air outlet (72). The sealing plate (421), the air entering the air inlet (71) enters the first cavity from the second cavity, and then is discharged from the second cavity. 7. The light-duty manhole device suitable for high-temperature combustion chambers according to claim 1, characterized in that, the refractory layer (1) is provided with a refractory brick ring (11), and the refractory brick ring (11) is A first annular groove (111) corresponding to the fire baffle (5) is provided, and a sealing surface is formed between the fire baffle (5) and the first annular groove (111). 8. The light-duty manhole device suitable for high-temperature combustion chambers according to claim 7, characterized in that, the refractory brick ring (11) is provided with a second ring corresponding to the first pipe ring (41) Slot (112). 9. The lightweight manhole device suitable for high-temperature combustion chambers according to claim 1, characterized in that there is a gap between the fire baffle (5) and the inner wall of the pipe ring group (4). 10. The light-duty manhole device suitable for high-temperature combustion chambers according to claim 1, characterized in that, the manhole cover (6) is connected to the outer layer (3), and the manhole cover (6) Includes cover plate (61).

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