Turning plate type isolation door

Abstract

A turning plate type isolation door comprises an L-shaped door frame and a door plate, the L-shaped door frame is obliquely arranged in an air duct, and the section of the L-shaped door frame is in an L shape; the door plate is movably arranged in the air duct and is driven by a driving mechanism to move, and a sealing strip matched with the L-shaped door frame is arranged at the bottom of the door plate; wherein the contact area of the L-shaped door frame and the sealing strip is small, the stress of the sealing strip is more uniform, and the sealing effect between the door plate and the L-shaped door frame is better; a fluidization pipe is arranged on one side, close to the L-shaped door frame, of the air channel, an air blowing hole is formed in one side, close to the L-shaped door frame, of the fluidization pipe, and air is blown to the L-shaped door frame through the fluidization pipe and the air blowing hole to be used for blowing away dust accumulated at the L-shaped door frame. The door plate extrudes the sealing strip, the door plate and the L-shaped door frame are sealed through the sealing strip, and the contact area between the L-shaped door frame and the sealing strip is small, so that the stress area of the sealing strip is small, the sealing strip is stressed and extruded more uniformly, and the sealing effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to a flap type isolation door. Background Art

[0002] It is well known in the thermal power generation industry that there are several coal mills in the generator sets of thermal power plants. The pulverized coal processed by the coal mills needs to be sent into the boiler furnace through high-temperature hot air. Among them, the hot air temperature at the entrance of the coal mill is as high as nearly 500 degrees Celsius. In order to ensure the normal operation of each coal mill, it is necessary to inspect and maintain the coal mills in turn. During the inspection and maintenance of the coal mill, in order to ensure the safety of the inspection and maintenance personnel entering the coal mill, an isolation door needs to be set at the entrance of the coal mill to prevent hot air from entering the coal mill, so as to ensure that the temperature in the coal mill during inspection and maintenance is within the range that the human body can bear. At present, the isolation doors used at the entrance of the coal mill are mostly plug-in isolation doors. This plug-in isolation door contains a door frame and a door panel. The door frame is fixed at the entrance of the coal mill. The outer side of the door frame is processed with slots on both sides. The opposite sides of the door panel are inserted into the corresponding slots in a sliding manner with the help of a power mechanism. In order to prevent hot air from entering the coal mill during inspection and maintenance, sealing strips are installed around the door panel and door frame.

[0003] After the existing isolation door is opened, dust is easily accumulated on the door frame, which causes poor sealing effect between the isolation door and the door frame. The temperature is easily transmitted to the other side. The dust accumulated on the door frame needs to be cleaned frequently, which is time-consuming. The isolation door and the door frame are in surface contact, the force-bearing area is large, and the sealing material may be unevenly stressed, resulting in poor sealing effect.

[0004] For this purpose, we propose a flap type isolation door. Utility Model Content

[0005] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a flap-type insulation door, so that the door panel squeezes the sealing strip, and the door panel and the L-shaped door frame are sealed by the sealing strip. The contact area between the L-shaped door frame and the sealing strip is small, which makes the force-bearing area of ​​the sealing strip small, and the sealing strip is squeezed more evenly, thereby achieving a better sealing effect.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A flap type isolation door, used in the air duct of a coal mill, comprises:

[0008] L-shaped door frame, set obliquely in the air duct;

[0009] The door panel is movably arranged in the air duct, and is driven to move by a driving mechanism. A sealing strip matching the L-shaped door frame is arranged at the bottom of the door panel;

[0010] Among them, the contact area between the L-shaped door frame and the sealing strip is small, and the force on the sealing strip is more even, so that the sealing effect between the door panel and the L-shaped door frame is better;

[0011] The air duct is provided with a fluidizing pipe on one side of the L-shaped door frame, and a blowing hole is provided on the side of the fluidizing pipe close to the L-shaped door frame. Air is blown toward the L-shaped door frame through the fluidizing pipe and the blowing hole to blow away dust accumulated at the L-shaped door frame.

[0012] It is further characterized by:

[0013] The cross section of the L-shaped door frame is L-shaped.

[0014] The driving mechanism comprises a cylinder, a telescopic end of the cylinder is rotatably provided with a first connecting arm, one end of the first connecting arm is rotatably connected to a second connecting arm, and the other end of the cylinder is rotatably provided on a connecting seat, which is fixed on the outside of the air duct.

[0015] The first connecting arm and the second connecting arm are rotatably connected via a main shaft, and the main shaft is rotatably arranged in the air duct via a supporting ring.

[0016] Two support rings are provided.

[0017] The support ring is provided with an axial hole, through which air is blown into the air duct to prevent dust in the air duct from floating outside and affecting the environment.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model has a compact and reasonable structure and is easy to operate. The door panel squeezes the sealing strip, and the door panel and the L-shaped door frame are sealed by the sealing strip. The contact area between the L-shaped door frame and the sealing strip is small, so that the stress area of ​​the sealing strip is small, and the sealing strip is squeezed more evenly, thereby achieving a better sealing effect.

[0020] At the same time, the utility model also has the following advantages:

[0021] (1) A plurality of blowing holes are provided on one side of the fluidizing tube close to the L-shaped door frame. By blowing air into the fluidizing tube, the gas in the fluidizing tube is blown toward the L-shaped door frame, thereby blowing away the dust accumulated at the L-shaped door frame, thereby preventing the dust accumulated at the L-shaped door frame from affecting the sealing effect between the door panel and the L-shaped door frame.

[0022] (2) The support rings are provided with axial holes, through which air is blown into the air duct. Dust is leaked due to the wear of the packing and affects the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 for Figure 1Enlarged schematic diagram at point A in the middle.

[0025] Figure 3 for Figure 1 Side view of.

[0026] Figure 4 This is a schematic diagram of the door panel of the utility model after opening.

[0027] Figure 5 It is a schematic diagram of the fluidizing tube of the utility model.

[0028] Among them: 1. door panel; 101. sealing strip; 2. L-shaped door frame; 3. air duct; 4. driving mechanism; 401. cylinder; 402. connecting seat; 403. first connecting arm; 404. second connecting arm; 405. main shaft; 406. supporting ring; 407. shaft hole; 5. fluidizing tube; 501. blowing hole. DETAILED DESCRIPTION

[0029] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0030] like Figure 1-Figure 5 As shown, a flap-type insulating door is used in an air duct 3 of a coal mill, and includes a door panel 1, an L-shaped door frame 2, a driving mechanism 4 and a fluidizing tube 5.

[0031] The L-shaped door frame 2 is tilted in the air duct 3, and the cross section of the L-shaped door frame 2 is L-shaped. The door panel 1 matches the L-shaped door frame 2, and a driving mechanism 4 is arranged on the outside of the air duct 3, which drives the door panel 1 to flip, and a sealing strip 101 matching the L-shaped door frame 2 is arranged at the bottom of the door panel 1. When the door panel 1 is closed, the door panel 1 squeezes the sealing strip 101, and the door panel 1 and the L-shaped door frame 2 are sealed by the sealing strip 101. The contact area between the L-shaped door frame 2 and the sealing strip 101 is small, which can be regarded as point contact, thereby making the force area of ​​the sealing strip 101 small, and the force squeezing of the sealing strip 101 is more uniform, thereby making the sealing effect better.

[0032] The fluidizing tube 5 is arranged in the air duct 3 and is located on the lower side of the L-shaped door frame 2. A plurality of blowing holes 501 are opened on the side of the fluidizing tube 5 close to the L-shaped door frame 2. By blowing air into the fluidizing tube 5, the gas in the fluidizing tube 5 is blown toward the L-shaped door frame 2, thereby blowing away the dust accumulated at the L-shaped door frame 2, thereby preventing the dust accumulated at the L-shaped door frame 2 from affecting the sealing effect between the door panel 1 and the L-shaped door frame 2.

[0033] The driving mechanism 4 includes a cylinder 401, and a first connecting arm 403 is rotatably provided at the telescopic end of the cylinder 401. One end of the first connecting arm 403 is rotatably connected to the second connecting arm 404. The other end of the cylinder 401 is rotatably provided on a connecting seat 402. The connecting seat 402 is fixed on the outside of the air duct 3. The first connecting arm 403 and the second connecting arm 404 are rotatably connected through a main shaft 405. The main shaft 405 is rotatably provided in the air duct 3 through a support ring 406. Two support rings 406 are provided. Both support rings 406 are provided with an axial hole 407. Air is blown into the air duct 3 through the axial hole 407 to prevent dust in the air duct 3 from leaking due to filler wear and causing an impact on the environment.

[0034] The door panel 1 is driven to move by the extension or contraction of the cylinder 401. When the cylinder 401 is extended, the telescopic end of the cylinder 401 drives the second connecting arm 404 to rotate along the main axis 405 through the first connecting arm 403, and the second connecting arm 404 drives the door panel 1 to move upward, so that the door panel 1 leaves the L-shaped door frame 2, and the door panel 1 can move to one side of the air duct 3. When the cylinder 401 is contracted, the telescopic end of the cylinder 401 drives the second connecting arm 404 to move along the main axis 405 through the first connecting arm 403, and the second connecting arm 404 drives the door panel 1 to move downward until the door panel 1 and the L-shaped door frame 2 are sealed and closed.

[0035] During specific use, before maintenance, the door panel 1 is opened through the driving mechanism 4, and the maintenance personnel enter and blow air into the fluidizing tube 5. The gas in the fluidizing tube 5 is blown toward the L-shaped door frame 2, thereby blowing away the dust accumulated at the L-shaped door frame 2, thereby preventing the dust accumulated at the L-shaped door frame 2 from affecting the sealing effect between the door panel 1 and the L-shaped door frame 2. The door panel 1 is then closed through the driving mechanism 4, and the door panel 1 and the L-shaped door frame 2 are closed. The door panel 1 squeezes the sealing strip 101, and the door panel 1 and the L-shaped door frame 2 are sealed by the sealing strip 101. The contact area between the L-shaped door frame 2 and the sealing strip 101 is small, which can be regarded as point contact, thereby making the force area of ​​the sealing strip 101 small, and the force extrusion of the sealing strip 101 is more uniform, thereby making the sealing effect better.

[0036] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A flap-type insulating door, used in the air duct (3) of a coal mill, characterized in that: include: An L-shaped door frame (2) is obliquely arranged in the air duct (3); A door panel (1) is movably arranged in the air duct (3), and is driven to move by a driving mechanism (4). A sealing strip (101) matching the L-shaped door frame (2) is arranged at the bottom of the door panel (1); The contact area between the L-shaped door frame (2) and the sealing strip (101) is small, and the force on the sealing strip (101) is more uniform, so that the sealing effect between the door panel (1) and the L-shaped door frame (2) is better; The air duct (3) is provided with a fluidizing pipe (5) on one side of the L-shaped door frame (2); a blowing hole (501) is provided on the side of the fluidizing pipe (5) close to the L-shaped door frame (2); air is blown toward the L-shaped door frame (2) through the fluidizing pipe (5) and the blowing hole (501) to blow away dust accumulated on the L-shaped door frame (2).

2. A flap-type insulating door as claimed in claim 1, characterized in that: The L-shaped door frame (2) has an L-shaped cross section.

3. The flap-type insulating door according to claim 1, characterized in that: The driving mechanism (4) comprises a cylinder (401), a telescopic end of the cylinder (401) being rotatably provided with a first connecting arm (403), one end of the first connecting arm (403) being rotatably connected to a second connecting arm (404), and the other end of the cylinder (401) being rotatably provided on a connecting seat (402), and the connecting seat (402) being fixed on the outside of the air duct (3).

4. A flap-type insulating door as claimed in claim 3, characterized in that: The first connecting arm (403) and the second connecting arm (404) are rotatably connected via a main shaft (405), and the main shaft (405) is rotatably arranged in the air duct (3) via a supporting ring (406).

5. A flap-type insulating door as claimed in claim 4, characterized in that: Two support rings (406) are provided.

6. The flap-type insulating door according to claim 4, characterized in that: The support ring (406) is provided with an axial hole (407), through which air is blown into the air duct (3), thereby preventing dust in the air duct (3) from leaking due to wear of the filler and causing an impact on the environment.

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