A high-temperature zone furnace door of a waste heat boiler

Abstract

The utility model relates to a high temperature area furnace door of waste heat boiler belongs to the technical field of boiler equipment, the utility model discloses a furnace door body is installed in the manhole flange, the furnace door body includes the cover plate that covers the manhole flange, the inner door plate that manhole inboard end is parallel with the cover plate, the annular plate that forms around between the cover plate and the inner door plate, the shell inside surrounded by the cover plate, the inner door plate and annular plate is filled with heat -insulating material, the cover plate is connected with the manhole flange through the sealing connection of buckle type bolt connection structure, the annular plate is divided into two sections and includes first section annular plate and second section annular plate, and first section annular plate and second section annular plate are connected through the flange butt joint and fill the heat insulation cotton between the flange butt joint surface.The utility model is provided with first section annular plate and second section annular plate through the flange butt joint makes the furnace door shell form the split structure to the heat transfer of the inner door plate to the cover plate through the annular plate is effectively blocked, avoids the furnace door temperature when waste heat boiler operation higher even overtemperature.

Description

Technical Field

[0001] This utility model relates to a furnace door for the high-temperature zone of a waste heat boiler, belonging to the technical field of boiler equipment. Background Technology

[0002] To facilitate access to the furnace for maintenance personnel, manholes and furnace doors are installed in the furnace walls of waste heat boilers. The furnace door typically consists of a shell formed by a cover plate covering the manhole and an inner lining for entering the manhole. For heat insulation, the interior of the shell is filled with insulating material. Because the cover plate and lining are made of metal, which has good heat transfer properties, the furnace door in the high-temperature zone of the waste heat boiler can reach high temperatures during boiler operation, even exceeding the rated temperature, posing risks to equipment operation and personnel safety. Summary of the Invention

[0003] The present invention mainly addresses the technical problem of high temperature or even overheating of furnace doors during boiler operation, and provides a high-temperature zone furnace door for waste heat boilers with better heat insulation performance.

[0004] The present invention addresses the aforementioned technical problems primarily through the following technical solution: The present invention includes a furnace door body installed on a manhole flange. The furnace door body includes a cover plate covering the manhole flange, an inner door plate parallel to the cover plate at its inner end away from the manhole flange inside the manhole, and a surrounding annular plate formed between the cover plate and the inner door plate. The annular plate is cylindrical and matches the manhole. The shell composed of the cover plate, the inner door plate, and the annular plate is filled with heat-insulating material. The cover plate is connected to the manhole flange by a snap-fit ​​bolt connection structure. The annular plate is divided into inner and outer sections and includes a first annular plate sealed to the inner door plate and a second annular plate sealed to the cover plate. The first annular plate and the second annular plate are joined by a flange, and heat-insulating cotton is filled between the flange joining surfaces.

[0005] As a preferred embodiment, the snap-fit ​​bolt connection structure includes corresponding screw holes on the cover plate and the manhole flange, and snap-fit ​​bolts installed on the outer protective plate of the furnace wall at positions corresponding to the screw holes. The screw holes are elongated holes with one end open. The snap-fit ​​bolts include a screw rod, a nut, a U-shaped seat, and a pin. The U-shaped seat is fixed to the outer protective plate of the furnace wall, and the screw rod is rotatably connected to the U-shaped seat through the pin. The cover plate and the manhole flange are connected and fixed by the screw rod being turned into the aligned screw holes and the nut being tightened.

[0006] Preferably, the cover plate and the inner door panel are connected by connecting screws.

[0007] Preferably, the outer wall of the cover plate is equipped with a door handle and a hinge support for mounting the hinge.

[0008] Preferably, the hinge support is installed in the middle of the cover plate, and the door handle is located on the side of the hinge support.

[0009] This utility model has a simple structure, reasonable configuration, and the following advantages: In this invention, the furnace door body comprises a furnace door shell formed by a cover plate, an inner door plate, and an annular plate, and heat insulation material filled inside the furnace door shell. This heat insulation material blocks most of the high temperature inside the furnace. Furthermore, the annular plate is divided into two sections connected by flanges. Heat insulation cotton is filled between the flanges of the first and second annular plates, blocking heat transfer between them. The heat insulation cotton separates the first and second annular plates, creating a split structure for the furnace door. This effectively prevents the inner door plate from transferring heat to the cover plate through the annular plate, avoiding excessively high cover plate temperatures and overheating during the operation of the waste heat boiler.

[0010] Furthermore, the cover plate is connected to the manhole flange via outward-opening elongated screw holes and snap-fit ​​bolts. The cover plate and the manhole flange can be quickly locked or loosened by snap-fit ​​bolts, making the opening and closing of the furnace door more convenient and faster.

[0011] Furthermore, the cover plate and the inner door plate are connected by connecting screws, which can further improve the strength and rigidity of the furnace door body to maintain the structural stability of the furnace door.

[0012] Furthermore, a door handle and a hinge support are installed on the outer wall of the cover plate. The door handle facilitates the operation of opening and closing the furnace door by the staff, and the hinge support provides the basic conditions for installing a hinge device that matches the furnace door.

[0013] Therefore, this utility model has the advantages of simple and reasonable structure, good heat insulation effect, etc., which can effectively reduce the temperature of the furnace door during the operation of the waste heat boiler, and is easy to manufacture and has low production cost. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0015] Appendix Figure 2 This is a schematic diagram of the furnace door body in a preferred embodiment of the present invention.

[0016] Appendix Figure 3 It is attached Figure 1 The diagram shown is a partially enlarged schematic of a preferred embodiment of the annular plate of this utility model.

[0017] Appendix Figure 4 It is attached Figure 1 The diagram shows a snap-fit ​​bolt connection structure in a preferred embodiment of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Furnace door body; 11. Cover plate; 12. Inner door panel; 13. Annular plate; 131. First section of annular plate; 132. Second section of annular plate; 133. Insulation cotton; 14. Thermal insulation material; 15. Door handle; 16. Hinge support; 2. Manhole flange; 3. Manhole; 4. Snap-on bolt; 41. Threaded rod; 42. Nut; 43. U-shaped seat; 44. Pin; 5. Threaded hole; 6. Outer protective plate of furnace wall; 7. Connecting threaded rod. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] Example 1: As shown in the attached document Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 As shown, this utility model includes a furnace door body 1 and a manhole flange 2. The manhole flange 2 is fixed to the outer protective plate 6 of the furnace wall, and the furnace door body 1 is connected to the manhole flange 2 by snap-fit ​​bolts 4. The furnace door body 1 includes a cover plate 11 covering the manhole flange 2, an inner door plate 12 parallel to the cover plate 11, and an annular plate 13 forming a ring between the cover plate 11 and the inner door plate 12. The furnace door shell composed of the cover plate 11, the inner door plate 12 and the annular plate 13 is filled with heat insulation material 14. The cover plate 11 is connected to the inner door panel 12 by a connecting screw 7; A door handle 15 and a hinge support 16 for mounting hinges are installed on the outer wall of the cover plate 11. The hinge support 16 is installed in the middle of the cover plate 11, and the door handle 15 is located on the side of the hinge support 16. The cover plate 11 and the manhole flange 2 have corresponding screw holes 5 on their outer edges. The screw holes 5 are elongated holes with open outer ends. After the screw holes 5 of the cover plate 11 and the manhole flange 2 are aligned, they are connected by snap-fit ​​bolts 4. The snap-fit ​​bolt 4 includes a screw 41, a nut 42, a U-shaped seat 43, and a pin 44. The U-shaped seat 43 is fixed on the outer protective plate 6 of the furnace wall at the position corresponding to the screw hole 5. The end of the screw 41 is rotatably connected to the U-shaped seat 43 through the pin 44. The cover plate 11 and the manhole flange 2 are connected and fixed by the screw 41 being rotated into the aligned screw hole 5 and the nut 42 being tightened. The annular plate 13 is divided into inner and outer sections and includes a first annular plate 131 that is sealed to the inner door plate 12 and a second annular plate 132 that is sealed to the cover plate 11. The first annular plate 131 and the second annular plate 132 are connected by flanges and the space between the flanges is filled with thermal insulation cotton 133.

[0021] When this utility model is implemented, the manhole flange 2 can be made of angle steel, and screw holes 5 are machined on the outer edges of the manhole flange 2 and the cover plate 11 respectively. The screw holes 5 open outwards. The manhole flange 2 is fixed to the outer protective plate 6 of the furnace wall by welding at the manhole 3 position. The flange surface with screw holes 5 protrudes from the outer protective plate 6 of the furnace wall. The U-shaped seat 43 of the snap-fit ​​bolt 4 is fixed to the outer protective plate 6 of the furnace wall by welding at the position corresponding to the screw hole 5. After the U-shaped seat 43 is fixed, the screw 41 can enter or leave the screw hole 5 on the manhole flange 2 by rotating around the pin 44. When assembling the furnace door body 1, the hinge support 15 and the door handle 16 are welded and fixed on the outer wall of the cover plate 11, and the second section of the annular plate 132 and the connecting screw 7 are welded and fixed on the inner wall of the cover plate 11. The first section of the annular plate 131 and the second section of the annular plate 132 are joined together. After filling the flange face between the first section of the annular plate 131 and the second section of the annular plate 132 with insulation cotton 133, the connecting bolts are tightened. The internal cavity formed by the cover plate 11 and the annular plate 13 is filled with heat insulation material 14. The connecting screw hole corresponding to the position of the connecting screw 7 is machined on the inner door plate 12. The inner door plate 12 is covered with heat insulation material 14 and the first section of the annular plate 131, and the threaded end of the connecting screw 7 is passed through the screw hole and the nut is tightened. Then the inner door plate 12 and the first section of the annular plate 131 are fixed by welding. At this point, the furnace door body 1 is assembled. When the furnace door body 1 is installed on the manhole 3, the inner part of the furnace door body 1 is inserted into the manhole 3, the cover plate 11 covers the manhole flange 2 and aligns the screw holes 5 of the two, the screw 41 is flipped into the corresponding screw hole 5 and the nut 42 is tightened. At this time, the furnace door body 1 and the manhole flange 2 are connected and fixed by snap-on bolts 4.

[0022] The hinge support 16 set on the outer wall of the cover plate 11 can be used to connect the hinge. The furnace door body 1 can be pivotally connected to the furnace wall through the hinge. The furnace door body 1 can close or open the manhole 3 by rotating around the hinge axis.

[0023] Of course, the above-described drawings and embodiments are only for explaining and illustrating this utility model, and should not be construed as improperly limiting this utility model. All technical solutions obtained by those skilled in the art through equivalent adjustments and variations based on this utility model fall within the protection scope of this utility model.

Claims

1. A furnace door for the high-temperature zone of a waste heat boiler, characterized in that, The furnace door includes a furnace door body (1) installed on the manhole flange (2), the furnace door body (1) including a cover plate (11) covering the manhole flange (2), an inner door plate (12) parallel to the cover plate (11) at the inner end of the manhole (3) away from the manhole flange (2), and an annular plate (13) forming a ring between the cover plate (11) and the inner door plate (12). The annular plate (13) is cylindrical and matches the manhole (3), and consists of the cover plate (11), the inner door plate (12) and the annular plate (13). The shell is filled with heat insulation material (14). The cover plate (11) is connected to the manhole flange (2) by a snap-fit ​​bolt connection structure. The annular plate (13) is divided into inner and outer sections and includes a first annular plate (131) that is sealed to the inner door plate (12) and a second annular plate (132) that is sealed to the cover plate (11). The first annular plate (131) and the second annular plate (132) are connected by flanges and the flange mating surfaces are filled with heat insulation cotton (133).

2. The high-temperature zone furnace door of a waste heat boiler according to claim 1, characterized in that, The snap-fit ​​bolt connection structure includes corresponding screw holes (5) on the cover plate (11) and the manhole flange (2), and snap-fit ​​bolts (4) on the outer protective plate (6) of the furnace wall corresponding to the screw holes (5). The screw holes (5) are elongated holes with one end open. The snap-fit ​​bolts (4) include a screw (41), a nut (42), a U-shaped seat (43), and a pin (44). The U-shaped seat (43) is fixed to the outer protective plate (6) of the furnace wall. The screw (41) is rotatably connected to the U-shaped seat (43) through the pin (44). The cover plate (11) and the manhole flange (2) are connected and fixed by the screw (41) rotating into the screw hole (5) aligned with the position and tightening the nut (42).

3. A waste heat boiler high-temperature zone furnace door according to claim 1 or 2, characterized in that, The cover plate (11) and the inner door panel (12) are connected by a connecting screw (7).

4. A waste heat boiler high-temperature zone furnace door according to claim 1 or 2, characterized in that, The outer wall of the cover plate (11) is provided with a door handle (15) and a hinge support (16) for installing the hinge.

5. The furnace door of the high-temperature zone of a waste heat boiler according to claim 4, characterized in that, The hinge support (16) is installed in the middle of the cover plate (11), and the door handle (15) is located on the side of the hinge support (16).

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