Fire observation door of chemical heating furnace

Abstract

The utility model discloses a chemical heating furnace fire observation door which comprises a heat insulation flange plate provided with a fire observation channel, a door frame is arranged on the outer side of the fire observation channel, a door shaft is arranged on the heat insulation fire observation door, and long-strip-shaped groove-shaped sliding ways with opposite groove openings are fixed to the upper portion and the lower portion of the door frame respectively. A transparent window capable of sliding left and right along the groove-shaped slideways is arranged between the groove-shaped slideways above and below the door frame, the transparent window comprises an anti-explosion glass plate, racks are respectively fixed on the outer side walls of the upper end and the lower end of the anti-explosion glass plate, and gears capable of being meshed with the racks are respectively and fixedly arranged on the upper part and the lower part of the door shaft correspondingly; when the heat insulation observation door is opened, the transparent window can slide towards the left side until the observation channel is completely closed, and when the heat insulation observation door is closed, the transparent window can slide towards the right side until the transparent window is completely separated from the observation channel. After the chemical heating furnace is applied, the working condition in the furnace can still be normally observed even if positive pressure is generated in the furnace.

Description

Technical Field

[0001] This utility model relates to a fire-watching door for a chemical heating furnace. Background Technology

[0002] Chemical heating furnaces are a major piece of equipment in the production process of chemical enterprises, and all kinds of chemical heating furnaces are equipped with inspection doors. The inspection door is a key structural component of the heating furnace, which is used to manually check the working condition of the combustion zone and the working condition of the furnace tubes. Modern industrial furnaces cannot eliminate these manual inspection doors.

[0003] A chemical heating furnace is typically equipped with multiple inspection doors. When inspecting the combustion zone and furnace tubes through these doors, the inspector manually pulls the handle to open the door and then visually observes the furnace's visible area. Under normal circumstances, the temperature in the furnace's radiant zone can reach 600-700 degrees Celsius, and a slight negative pressure exists. When the inspection door is opened, ambient air rushes into the furnace (this influx of air negatively impacts the combustion air ratio). The inspector can briefly observe the furnace's condition by directly probing the door before quickly closing it to complete the inspection of that station.

[0004] There are some specific operating conditions for chemical heating furnaces, namely the situation of positive pressure inside the furnace (set according to the needs of the process reaction inside the furnace). When the inspector opens the fire door, high-temperature gas under positive pressure will rush out from the opened fire door passage. If the observer is not careful, it may cause facial burns. In this situation, it is impossible to observe the operating conditions inside the furnace. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a furnace inspection door for chemical heating furnaces that allows normal observation of the furnace working conditions even when positive pressure is generated inside the furnace.

[0006] To solve the above-mentioned technical problems, this utility model provides a viewing door for a chemical heating furnace, comprising a rectangular heat-insulating flange plate with mounting screw holes at its four corners, a rectangular viewing channel on the heat-insulating flange plate, a rectangular door frame mounted on the heat-insulating flange plate outside the viewing channel, and a heat-insulating viewing door that can be fastened to the door frame to close the viewing channel. A door hinge is mounted on the heat-insulating viewing door, and a heat-insulating door handle is mounted on the lower outer side of the heat-insulating viewing door. The key feature is that: long, slotted, grooved slides with opposing grooves are fixed at the top and bottom of the door frame, and a transparent viewing window that can slide left and right along the slotted slides is installed between the upper and lower slotted slides of the door frame. The window, a transparent viewing window, includes an explosion-proof glass panel. Racks are fixed to the outer walls of the upper and lower ends of the explosion-proof glass panel. Correspondingly, gears that mesh with the racks are fixed to the upper and lower parts of the door hinge. When the insulated fire viewing door is opened, the upper and lower gears rotate with the door hinge. At this time, the racks meshing with the upper and lower gears can drive the transparent viewing window to slide to the left until the fire viewing passage is completely closed. When the insulated fire viewing door is closed, the upper and lower gears rotate with the door hinge. At this time, the racks meshing with the upper and lower gears can drive the transparent viewing window to slide to the right until it is completely disengaged from the fire viewing passage.

[0007] As an improvement of this utility model, the upper and lower parts of the heat insulation flange are respectively vertically fixed with lugs, the door hinge is rotatably mounted between the lugs on the upper and lower parts of the heat insulation flange, and also includes plate-shaped connecting lugs located above and below the heat insulation fire door, one end of the plate-shaped connecting lug is fixed to the door hinge, and the other side is fixedly connected to the gear and the end face of the heat insulation fire door.

[0008] When the chemical heating furnace of this utility model is applied to the fire viewing door, the transparent window can be slid to the left to completely close the fire viewing channel when the insulated fire viewing door is opened. Even when positive pressure is generated inside the furnace, the operator can still observe the working conditions inside the furnace normally, and it can prevent a large amount of external gas from rushing in, thus not affecting the combustion quality of the fuel inside the furnace. This utility model is provided with a plate-shaped connecting lug, one end of which is fixed to the door hinge, and the other side is fixedly connected to the gear and the end face of the insulated fire viewing door. This can better ensure the synchronous rotation of the insulated fire viewing door and the gear, and improve the reliability of this utility model. Attached Figure Description

[0009] The present invention will now be described in further detail with reference to the accompanying drawings.

[0010] Figure 1 This is an isometric view of a fire-viewing door for a chemical heating furnace according to this utility model. The fire-viewing door in the figure is in a closed state.

[0011] Figure 2 This is an isometric view of a fire-viewing door for a chemical heating furnace according to this utility model. The fire-viewing door is in a half-open state in the figure, and the heat-insulating door handle is not shown in the figure.

[0012] Figure 3 This is an isometric view of a fire-viewing door for a chemical heating furnace according to this utility model. The fire-viewing door is in a fully open state in the figure, and the heat-insulating door handle is not shown in the figure.

[0013] Figure 4 yes Figure 2 Enlarged schematic diagram of the structure at point I.

[0014] Figure 5 yes Figure 2 Enlarged schematic diagram of the structure at point II. Detailed Implementation

[0015] See Figure 1 - Figure 5 This utility model discloses a viewing door for a chemical heating furnace, comprising a rectangular heat-insulating flange plate 1 with mounting screw holes 2 at its four corners, a rectangular viewing channel 3 formed on the heat-insulating flange plate, a rectangular door frame 4 mounted on the heat-insulating flange plate outside the viewing channel, a heat-insulating viewing door 5 that can be fastened to the door frame to close the viewing channel, a door hinge 6 mounted on the heat-insulating viewing door, and a heat-insulating door handle 7 mounted on the lower outer side of the heat-insulating viewing door. The feature is that: the upper and lower parts of the door frame 4 are respectively fixed with long, narrow grooved slides 8 with opposing slots 81; a transparent viewing window 9 that can slide left and right along the grooved slides is installed between the upper and lower grooved slides of the door frame; the transparent viewing window includes an explosion-proof glass plate 9. 1. Racks 92 are fixed to the outer walls of the upper and lower ends of the explosion-proof glass plate, respectively. Correspondingly, gears 10 that can mesh with the racks are fixed to the upper and lower parts of the door hinge 6. The axis of the gears is on the same straight line as the axis of the door hinge. When the heat-insulated fire door 5 is opened, the upper and lower gears rotate with the door hinge. At this time, the racks meshing with the upper and lower gears can drive the transparent window 9 to slide to the left until the fire viewing channel 3 is completely closed. When the heat-insulated fire door 5 is closed, the upper and lower gears rotate with the door hinge. At this time, the racks meshing with the upper and lower gears can drive the transparent window 9 to slide to the right until it is completely disengaged from the fire viewing channel 3. The upper and lower parts of the heat-insulated flange plate 1 are vertically fixed with lugs 11, and the door hinge 6 is rotatably mounted between the lugs on the upper and lower parts of the heat-insulated flange plate. It also includes plate-shaped connecting ears 12 located above and below the heat-insulated fire door 5. One end of the plate-shaped connecting ear is fixed to the door hinge, and the other side is fixedly connected to the gear 10 and the end face of the heat-insulated fire door 5.

[0016] It is understood that the above specific description of the present utility model is only used to illustrate the present utility model and is not limited to the technical solutions described in the embodiments of the present utility model. Any modifications or equivalent substitutions to the present utility model to achieve the same technical effect are within the protection scope of the present utility model.

Claims

1. A viewing door for a chemical heating furnace, comprising a rectangular heat-insulating flange plate (1) with mounting screw holes (2) at its four corners, a rectangular viewing channel (3) on the heat-insulating flange plate, a rectangular door frame (4) mounted on the heat-insulating flange plate outside the viewing channel, a heat-insulating viewing door (5) that can be fastened to the door frame to close the viewing channel, a door hinge (6) mounted on the heat-insulating viewing door, and a heat-insulating door handle (7) mounted on the lower outer side of the heat-insulating viewing door, characterized in that: The upper and lower sides of the door frame (4) are respectively fixed with long strip-shaped grooves (8) with opposite slots (81). A transparent window (9) that can slide left and right along the groove is installed between the upper and lower grooves of the door frame. The transparent window includes an explosion-proof glass plate (91). A rack (92) is fixed on the outer side wall of the upper and lower ends of the explosion-proof glass plate. Correspondingly, the upper and lower parts of the door hinge (6) are respectively fixed with gears (10) that can mesh with the racks. When the heat-insulated fire door (5) is opened, the upper and lower gears rotate with the door hinge. At this time, the rack that meshes with the upper and lower gears can drive the transparent window (9) to slide to the left until the fire viewing channel (3) is completely closed. When the heat-insulated fire door (5) is closed, the upper and lower gears rotate with the door hinge. At this time, the rack that meshes with the upper and lower gears can drive the transparent window (9) to slide to the right until it is completely disengaged from the fire viewing channel (3).

2. The inspection door for a chemical heating furnace as described in claim 1, characterized in that: The upper and lower parts of the heat insulation flange (1) are respectively vertically fixed with lugs (11). The door hinge (6) is rotatably mounted between the lugs on the upper and lower parts of the heat insulation flange. It also includes plate-shaped connecting lugs (12) located above and below the heat insulation fire door (5). One end of the plate-shaped connecting lug is fixed to the door hinge, and the other side is fixedly connected to the gear (10) and the end face of the heat insulation fire door (5).

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