Automatically-controlled smoke and air duct isolation device

Abstract

The utility model relates to an automatic control smoke and air duct isolating device which comprises a smoke and air duct and a smoke and air duct isolating device body, an induced draft fan is arranged at the position, close to an outlet, of the smoke and air duct, and the smoke and air duct isolating device body is of an inserting plate type structure and is composed of a door frame, a door plate matched with the door frame, a bearing seat and a power device. Wherein the door frame is inserted into the flue, the area of the door frame is matched with the section of the flue, a bearing seat and a power device are arranged on the top or the bottom of the outer side of the door frame and located on the outer side of the flue, a door shaft is installed on the bearing seat, and a door plate is installed on the door shaft and located in the door frame, so that the door plate is suspended on the bearing seat through the door shaft. The door plate is connected with a power device, the door plate is controlled to be opened or closed through the power device, and opening and closing of the smoke and air duct are achieved. The device is simple and reasonable in overall structure, practical and convenient.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas duct technology and relates to an automated control flue gas duct isolation device. Background Technology

[0002] The existing louvered damper doors used in flue gas systems, especially those located at the fan outlet as isolation dampers, mainly have the following problems:

[0003] 1) During boiler operation, the blower ( Figure 1 (As shown in serial number 3) are generally operated in pairs in parallel, with the damper at the fan outlet ( Figure 4 As shown) are all in the fully open state, each door panel ( Figure 3 , Figure 4 As shown in number 4, it is located in the middle of the flue (air) duct. When the fluid flows through each door panel, it will impact and rub against each door panel, causing flow resistance loss.

[0004] 2) During boiler operation, when a single fan malfunctions and requires unilateral shutdown for maintenance, the original louvered damper (such as...) Figure 2 (As shown) The damper is not properly closed, especially the outlet damper of the induced draft fan. The leaking sulfur-containing hot flue gas prevents maintenance personnel from entering the fan for repairs, forcing a shutdown and causing economic losses to the power plant. The reason for the louvered damper not closing properly is that the damper plate (… Figure 3 , Figure 4 The sealing device (shown in number 4) is poorly designed, with the gap α between the edges of each door panel being too large.

[0005] To address this issue, an automated smoke and air duct isolation device was designed to overcome the aforementioned problems. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an automated control flue gas duct isolation device with a simple and reasonable structure, practicality, safety and reliability, and good sealing performance.

[0007] The utility model discloses an automatic control's smoke air flue insulating device, including smoke air flue and smoke air flue insulating device, is provided with the smoke fan at the smoke air flue close export, the smoke air flue insulating device is the plug -in board type structure, it is composed of door frame, with the door frame matched door board, bearing seat and power device, wherein door frame inserts and installs on the smoke air flue, and the area of door frame is adapted with the cross section of smoke air flue, and bearing seat and power device are arranged on the outside top of door frame and are located the outside of smoke air flue, and door shaft is installed on bearing seat, and door board is installed on door shaft and is located in door frame, make door board hang on bearing seat through door shaft, be used for ensuring that door board opens and shuts nimblely not jam, door board is connected with power device, and the opening or closing of door board is controlled through power device, realizes the opening and shutting of smoke air flue.

[0008] As preferred: the power device is composed of cylinder and cylinder seat, the cylinder seat is fixed on the outside top of door frame, the cylinder is installed on the cylinder seat, and the end of the cylinder away from the cylinder seat is connected with the door board, and the opening or closing of the door board is realized through the contraction of the cylinder.

[0009] As preferred: the number of door boards is one, and the bearing seat and the cylinder seat are arranged on one side end of the door frame, the cylinder installed on the cylinder seat is connected with the middle position of the door board, and the opening or closing of the door board is driven through the contraction of the cylinder.

[0010] As preferred: the number of door boards is four, and the size of each door board is the same, one bearing seat and one cylinder seat are installed on the two side ends of the door frame respectively, and one bearing seat and one cylinder seat are arranged on the middle position of the door frame, the door shaft is installed on each bearing seat, and the cylinder is installed on each cylinder seat, the two cylinders on the two side ends of the door frame and the two cylinders on the middle position of the door frame are symmetrically arranged, so as to ensure that the four door boards divide the inside of the smoke air flue into two passages.

[0011] As preferred: the connecting part between the door board and the door frame is provided with a door seat sealing device, so as to ensure that the door board and the door seat sealing device are tightly attached when the door board is completely closed, and the internal leakage amount at the gap between the door board and the door frame is reduced.

[0012] As preferred: the door seat sealing device is a sealing gasket, and the sealing gasket is made of rubber, foam or cotton.

[0013] The utility model discloses the beneficial effect is as follows:

[0014] The device designed by the utility model, compared with the traditional louver type baffle door, can significantly reduce fluid flow resistance loss when the door plate is completely opened, and meanwhile, when the door plate is closed, the tightness is greatly improved, and zero leakage can be achieved. Especially when a single fan fails and is under maintenance, due to the use of the door seat sealing device, the door plate can be tightly closed without leakage, and the on-line maintenance work of the fan can be ensured to proceed normally, thereby improving the safety and reliability of the generator set, and the device is particularly suitable for use in the flue and air duct system of a power station. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the arrangement of the existing baffle damper used at the outlet of the fan.

[0016] Figure 2 It is a schematic view of the structure of the existing baffle damper.

[0017] Figure 3 It is a sectional view of the existing baffle damper in a completely closed state.

[0018] Figure 4 It is a sectional view of the existing baffle damper in a completely opened state.

[0019] Figure 5 It is a schematic view of the arrangement of the pneumatic check damper of the utility model used at the outlet of the fan.

[0020] Figure 6 It is a front view of the utility model.

[0021] Figure 7 It is a side view of the utility model.

[0022] Figure 8 It is a top view of the utility model. DETAILED DESCRIPTION

[0023] In order for those skilled in the art to more clearly understand the purpose, technical scheme and advantages of the utility model, the utility model will be further described below in combination with the drawings and embodiments.

[0024] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms such as "up", "down", "left", "right", "inner", "outer", "horizontal", "vertical" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element indicated must have a particular orientation, so it cannot be understood as a limitation on the utility model.

[0025] The utility model will be described in detail below in combination with the drawings: as Figure 5As shown in the figure, an automatic control smoke flue insulation device includes a smoke flue 1 and a smoke flue insulation device 9 installed on the smoke flue 1, and an induced draft fan 2 is arranged near the outlet of the smoke flue 1. The smoke flue insulation device 9 is a plug-in plate structure, which is composed of a door frame 3, a door plate 4 matched with the door frame 3, a bearing seat 5 and a power device. The door frame 3 is inserted and installed on the smoke flue 1, and the area of the door frame 3 is adapted to the cross section of the smoke flue 1. The bearing seat 5 and the power device are arranged on the outside top or bottom of the door frame 3 outside the smoke flue 1. The door shaft 6 is installed on the bearing seat 5, and the door plate 4 is installed on the door shaft 6 inside the door frame 3, so that the door plate 4 is suspended on the bearing seat 5 through the door shaft 6, to ensure that the door plate 4 is flexible and not jammed when opening and closing. The door plate 4 is connected with the power device, and the opening and closing of the door plate 4 is controlled through the power device, to realize the opening and closing of the smoke flue 1.

[0026] As shown in the figure, Figures 6-7 The power device is composed of a cylinder 7 and a cylinder seat 8. The cylinder seat 8 is fixed on the outside top of the door frame 3, and the cylinder 7 is installed on the cylinder seat 8. The end of the cylinder 7 away from the cylinder seat 8 is connected with the door plate 4, and the opening and closing of the door plate 4 is realized through the contraction of the cylinder.

[0027] The number of the door plate 4 is one, and the bearing seat 5 and the cylinder seat 8 are arranged on one side end of the door frame 3. The cylinder 7 installed on the cylinder seat 8 is connected with the middle position of the door plate 4, and the opening and closing of the door plate 4 is driven through the contraction of the cylinder 7.

[0028] The number of the door plate 4 can also be four, and the size of each door plate 4 is the same. One bearing seat 5 and one cylinder seat 8 are respectively arranged on the two side ends of the door frame 3, and one bearing seat 5 and one cylinder seat 8 are respectively arranged on the middle position of the door frame 3. The door shaft 6 is installed on each bearing seat 5, and the cylinder 7 is installed on each cylinder seat 8. The two cylinders 7 on the two side ends of the door frame 3 and the two cylinders 7 on the middle position of the door frame 3 are symmetrically arranged, to ensure that the four door plates 4 after being opened divide the inside of the smoke flue 1 into two passages.

[0029] As shown in the figure, Figure 8 A door seat sealing device is arranged between the door plate 4 and the door frame 3, to ensure that the door plate 4 is tightly attached to the door seat sealing device when the door plate 4 is completely closed, and to reduce the internal leakage at the gap between the door plate 4 and the door frame 3. The door seat sealing device is a sealing gasket 10, which is made of rubber, foam or cotton, etc. to meet the actual demand.

[0030] The device designed in this invention, compared to traditional louvered baffle doors, significantly reduces fluid flow resistance loss when the door is fully open. Simultaneously, it greatly improves airtightness when the door is closed, achieving zero leakage. Especially during maintenance of a single fan, the use of the door seat sealing device ensures a tight, leak-free closure, guaranteeing the smooth operation of online fan maintenance and thus improving the safety and reliability of the generator set. It is particularly suitable for use in power plant boiler flue and duct systems.

[0031] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An automated control flue gas duct isolation device, comprising a flue gas duct (1) and a flue gas duct isolation device (9) installed on the flue gas duct (1), wherein an induced draft fan (2) is provided near the outlet of the flue gas duct (1), characterized in that: The flue gas duct isolation device (9) is a plug-in type structure, which consists of a door frame (3), a door panel (4) that matches the door frame (3), a bearing seat (5) and a power device. The door frame (3) is inserted and installed on the flue gas duct (1). The area of ​​the door frame (3) is adapted to the cross section of the flue gas duct (1). The bearing seat (5) and the power device are provided on the top or bottom of the outside of the door frame (3) on the outside of the flue gas duct (1). A door hinge (6) is installed on the bearing seat (5), and a door panel (4) is installed on the door hinge (6) inside the door frame (3), so that the door panel (4) is suspended on the bearing seat (5) through the door hinge (6) to ensure that the door panel (4) can be opened and closed flexibly without jamming. The door panel (4) is connected to the power device, and the door panel (4) is opened or closed by controlling the power device to realize the opening and closing of the flue gas duct (1).

2. The automated control flue gas duct isolation device according to claim 1, characterized in that: The power unit consists of a cylinder (7) and a cylinder seat (8). The cylinder seat (8) is fixed on the top of the outer side of the door frame (3). The cylinder (7) is installed on the cylinder seat (8). The end of the cylinder (7) away from the cylinder seat (8) is connected to the door panel (4). The door panel (4) is opened or closed by the contraction of the cylinder.

3. The automated control flue gas duct isolation device according to claim 2, characterized in that: The number of door panels (4) is one. The bearing seat (5) and the cylinder seat (8) are both located at one end of the door frame (3). The cylinder (7) installed on the cylinder seat (8) is connected to the middle position of the door panel (4). The door panel (4) is opened or closed by the contraction of the cylinder (7).

4. The automated control flue gas duct isolation device according to claim 2, characterized in that: The number of door panels (4) is four, and each door panel (4) is the same size. A bearing seat (5) and a cylinder seat (8) are installed at the two ends of the door frame (3), and a bearing seat (5) and a cylinder seat (8) are set on the left and right sides of the middle position of the door frame. A door hinge (6) is installed on each bearing seat (5), and a cylinder (7) is installed on each cylinder seat (8). The two cylinders (7) at the two ends of the door frame (3) and the two cylinders (7) at the middle position of the door frame (3) are symmetrically arranged to ensure that the four door panels (4) after opening divide the interior of the smoke duct (1) into two equal channels.

5. The automated control flue gas duct isolation device according to claim 3 or 4, characterized in that: A door seat sealing device is provided at the connection between the door panel (4) and the door frame (3). The door seat sealing device is used to ensure that when the door panel (4) is in a completely closed state, the door panel (4) and the door seat sealing device are tightly fitted together, reducing the amount of internal leakage in the gap between the door panel (4) and the door frame (3).

6. The automated control flue gas duct isolation device according to claim 5, characterized in that: The door seat sealing device is a sealing gasket (10), which is made of rubber, foam or cotton.

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