Novel boiler manhole door device

Abstract

The utility model discloses a novel boiler manhole door device which comprises a furnace shell protection plate, a door frame connected with the furnace shell protection plate and a manhole door cover, a heat preservation layer is arranged in the manhole door cover, and a sealing piece used for sealing is arranged between the door frame and the manhole door cover. The heat preservation layer formed by combining the aluminum silicate fiber blanket and the high-aluminum refractory castable is arranged in the manhole cover, and the sealing piece composed of the ceramic fiber braided ropes is arranged between the door frame and the manhole door cover, so that loss of heat in the boiler is prevented, a good heat preservation effect is achieved, the temperature of the manhole door and the nearby area can be effectively reduced, and the service life of the boiler is prolonged. The boiler efficiency is improved, and the safety near the manhole cover of the boiler is improved; the door frame and the manhole door cover are made of steel plates and are not prone to damage, and the service life of the manhole door is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler equipment, in particular to a novel boiler manhole door device. Background Art

[0002] In order to facilitate the maintenance and repair of the heating surface and other equipment inside the boiler when the boiler is shut down, it is necessary to install manhole doors on the furnace and heating surface areas. The manhole doors must not only allow people to enter and exit safely, but also ensure the isolation of the internal environment from the external environment during the operation of the waste heat boiler, and ensure that high-temperature flue gas does not leak out.

[0003] The manhole door system currently used on boilers consists of a door cover, a bracket, and a door seat. The door seat is bolted to the boiler bracket or guard plate. The door cover and bracket are connected by a screw with a handwheel, and the ends of the bracket are connected to the door seat by a pin. The disadvantages of this manhole door are: 1. During boiler operation, because the manhole door is not insulated, the temperature inside and around the manhole door is high, which not only increases heat loss and reduces boiler efficiency, but also poses a safety hazard to the area around the boiler manhole door. 2. The main components of conventional manhole doors are made of cast steel, which is easily damaged during installation and opening, resulting in a short service life. Utility Model Content

[0004] In order to solve the above technical problems, the utility model designs a novel boiler manhole door device which can effectively reduce the temperature of the manhole door and its surrounding area and prolong the service life.

[0005] The utility model adopts the following technical solutions:

[0006] A novel boiler manhole door device comprises a furnace shell guard plate, a door frame connected to the furnace shell guard plate, and a manhole door cover. The manhole door cover is provided with an insulation layer inside, and a sealing member for sealing is provided between the door frame and the manhole door cover.

[0007] Preferably, the sealing element is composed of a ceramic fiber braided rope.

[0008] Preferably, the thermal insulation layer is composed of aluminum silicate fiber blanket and high-alumina refractory castable.

[0009] Preferably, the door frame and the manhole door cover are both made of steel plates.

[0010] Preferably, the manhole door cover is provided with pressure plates around it and is connected to the door frame via nuts and studs.

[0011] Preferably, one side of the manhole door cover is hinged to the door frame through a pin shaft, and the other side is connected and closed to the door frame through a door panel and a door gate.

[0012] The beneficial effects of the present invention are as follows: (1) the present invention arranges an insulation layer composed of an aluminum silicate fiber blanket and a high-aluminum refractory castable inside the manhole cover, and arranges a seal composed of a ceramic fiber braided rope between the door frame and the manhole door cover, thereby preventing the loss of heat in the boiler and having a good insulation effect, which can effectively reduce the temperature of the manhole door and its surrounding area, improve the efficiency of the boiler, and improve the safety near the boiler manhole cover; (2) the door frame and the manhole door cover are made of steel plates, which are not easy to be damaged, and effectively improve the service life of the manhole door. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 yes Figure 1 A cross-sectional view in the middle BB direction;

[0015] Figure 3 yes Figure 1 A cross-sectional view in the AA direction;

[0016] In the figure: 1. furnace shell guard plate, 2. door frame, 3. manhole door cover, 4. insulation layer, 5. seal, 6. pressure plate, 7. stud, 8. nut. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0018] Example: Figure 1-Figure 3 As shown, a new boiler manhole door device includes a furnace shell guard plate 1, a door frame 2 connected to the furnace shell guard plate, and a manhole door cover 3. An insulation layer 4 is provided inside the manhole door cover, and a sealing member 5 for sealing is provided between the door frame and the manhole door cover.

[0019] The seal is made of ceramic fiber braided rope, which has a good sealing effect and prevents the overflow of high-temperature flue gas under the high-temperature environment of the boiler.

[0020] The manhole door cover is in turn insulated with an aluminum silicate fiber blanket and a high-alumina refractory castable. This combination combines refractory, thermal insulation, and heat preservation, preventing heat loss within the boiler and providing excellent insulation, effectively reducing the temperature of the manhole door and the surrounding area.

[0021] The door frame and manhole cover are both constructed of steel, making them resistant to breakage and extending the life of the manhole door. The manhole cover is surrounded by pressure plates 6, which are connected to the door frame via nuts 8 and studs 7. When closing the manhole door, tightening the nuts compresses the ceramic fiber braided rope, sealing the cover. One side of the manhole cover is hinged to the door frame via a pin, while the other side is connected to the door frame via a door panel and gate.

[0022] The embodiment described above is only a preferred solution of the present invention and does not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A new type of boiler manhole door device, characterized by: It includes a furnace shell guard plate, a door frame connected to the furnace shell guard plate, and a manhole door cover. The manhole door cover is provided with a heat insulation layer, and a sealing member for sealing is provided between the door frame and the manhole door cover.

2. A novel boiler manhole door device according to claim 1, characterized in that: The sealing element is composed of ceramic fiber braided rope.

3. A novel boiler manhole door device according to claim 1, characterized in that: The thermal insulation layer consists of aluminum silicate fiber blanket and high-aluminum refractory castable.

4. A novel boiler manhole door device according to claim 1, characterized in that: The door frame and the manhole door cover are both made of steel plates.

5. A novel boiler manhole door device according to claim 1, characterized in that: The manhole door cover is provided with pressure plates around it and is connected to the door frame through nuts and studs.

6. A novel boiler manhole door device according to claim 1, characterized in that: One side of the manhole door cover is hinged to the door frame through a pin shaft, and the other side is connected and closed to the door frame through a door plate and a door gate.

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