Outlet baffle door of induced draft fan

Abstract

The utility model discloses an induced draft fan outlet baffle door which comprises a door plate, an open groove is formed in the door plate, a first sealing plate is movably connected in the open groove, symmetrical second sealing plates are movably connected in the open groove, the first sealing plate is movably connected to the second sealing plates, a rotating shaft is fixedly connected to the side face of the door plate, and the rotating shaft is fixedly connected to the side face of the door plate. A door handle is fixedly connected to the door plate, a third rotating groove is formed in the sealing batten, a first gear is fixedly connected to the other end of the first rotating rod, a second gear is correspondingly and fixedly connected to the other end of the second rotating rod, and the first gear and the second gear are sleeved with a movably-connected rotating belt. Through the structure, leakage points are effectively reduced, the sealing flexibility and adaptability are improved, the sealing efficiency is improved, the service life of the baffle door is prolonged, the maintenance cost is reduced, the structural stability is improved, and the operation convenience and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of baffle gate technology, and in particular to a baffle gate for the outlet of an induced draft fan. Background Technology

[0002] Two-stage dynamically adjustable axial-flow induced draft fans are the main auxiliary equipment used to maintain negative pressure in the furnace and send the flue gas generated by boiler combustion into the chimney for discharge. These fans are typically arranged in parallel, with the flue gas outlets of both fans converging into a single main flue, which then enters the desulfurization absorption tower. During the operation and maintenance of the induced draft fans, the outlet damper plays a crucial role.

[0003] Traditional induced draft fan outlet damper designs often employ a louvered structure, typically consisting of six dampers. However, this design suffers from a significant problem: large gaps exist between the dampers, making zero leakage impossible. This leakage not only affects flue gas flow efficiency but can also lead to fluctuations in furnace negative pressure or insufficient output, thus adversely impacting the unit's power generation load. Utility Model Content

[0004] The purpose of this utility model is to provide an exhaust fan outlet baffle that effectively reduces leakage points, increases the flexibility and adaptability of sealing, improves sealing efficiency, extends the service life of the baffle, reduces maintenance costs, improves structural stability, and enhances the convenience and efficiency of operation.

[0005] To achieve the above objectives, an exhaust fan outlet baffle door is provided, comprising a door panel with a slot, a first sealing plate movably connected within the slot, and symmetrical second sealing plates movably connected within the slot. The first sealing plate is movably connected to the second sealing plate. A rotating shaft is fixedly connected to the side of the door panel, and a door handle is fixedly connected to the door panel.

[0006] According to the aforementioned induced draft fan outlet baffle door, a sealing strip is fixedly connected to the door panel, a rotating seat is fixedly connected to the door panel, a third rotating groove is provided on the sealing strip, and a fourth rotating groove is provided on the sealing strip.

[0007] According to the aforementioned induced draft fan outlet baffle gate, a first rotating groove is provided on the first sealing plate, and a second rotating groove is provided on the second sealing plate.

[0008] According to the aforementioned induced draft fan outlet baffle gate, a first rotating rod is movably connected in the third rotating groove, the fourth rotating groove, and the first rotating groove, and symmetrical second rotating rods are movably connected in the third rotating groove, the fourth rotating groove, and the second rotating groove. One end of the first rotating rod and the second rotating rod is fixedly connected to a limit block, and the other side of the limit block is movably connected to a sealing strip.

[0009] According to the aforementioned induced draft fan outlet baffle gate, a first gear is fixedly connected to the other end of the first rotating rod, and a second gear is correspondingly fixedly connected to the other end of the second rotating rod. A rotating belt is movably connected to the first gear and the second gear.

[0010] According to the aforementioned induced draft fan outlet baffle gate, a gear platform is fixedly connected inside the rotating belt, and the gear platform is movably connected to a first gear and a second gear. A rotating handle is fixedly connected to the side of the first gear.

[0011] According to the aforementioned induced draft fan outlet baffle door, the first sealing plate and the second sealing plate are provided with sealing grooves, the first sealing plate is fixedly connected with a first sealing strip, the second sealing plate is fixedly connected with a second sealing strip, and the first sealing strip and the second sealing strip are movably connected to the sealing grooves.

[0012] Beneficial effects:

[0013] 1. The first sealing plate and the symmetrical second sealing plate, movably connected within the slots on the door panel, ensure a tight fit between the two sealing plates when the door is closed, effectively reducing leakage points. The movable connection between the first and second sealing plates increases the flexibility and adaptability of the sealing, ensuring a good sealing effect under different operating conditions. The sealing strips fixedly connected to the door panel, along with the third and fourth rotating slots, provide support for the stable rotation of the sealing plates, while also enhancing the structural stability. This improves sealing efficiency, extends the service life of the door, and reduces maintenance costs.

[0014] 2. The first and second rotating rods are movably connected to the third and fourth rotating grooves, as well as the first and second rotating grooves, respectively, ensuring smooth movement of the sealing plate during opening and closing. The design of the limit block effectively prevents the rotating rods from falling off, improving the stability of the structure. The first and second gears are movably connected via a rotating belt, allowing for easy synchronous opening and closing of the sealing plate by rotating the handle, improving operational convenience and efficiency. The sealing grooves on the first and second sealing plates, along with the fixedly connected first and second sealing strips, enhance the sealing effect, ensuring zero leakage when the baffle door is closed.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1This is a perspective view of an exhaust fan outlet baffle gate proposed in this utility model;

[0018] Figure 2 This is a rear cross-sectional view of an induced draft fan outlet baffle door proposed in this utility model;

[0019] Figure 3 This utility model provides a cross-sectional view of the sealing plate of an induced draft fan outlet baffle door.

[0020] Figure 4 This utility model proposes a baffle gate for the outlet of an induced draft fan. Figure 3 A magnified view of a section at point A above;

[0021] Figure 5 This utility model provides a cross-sectional view of the rotating rod of a blower outlet baffle.

[0022] Figure 6 This is a schematic diagram of the rotating structure of the exhaust fan outlet baffle gate proposed in this utility model.

[0023] Legend:

[0024] 1. Door panel; 2. Rotating shaft; 3. Door handle; 4. Rotating belt; 5. Gear platform; 6. Rotating handle; 7. First sealing plate; 8. Second sealing plate; 9. Sealing strip; 10. Rotating seat; 11. Slot; 12. First rotating rod; 13. Second rotating rod; 14. First rotating groove; 15. Second rotating groove; 16. Limiting block; 17. Third rotating groove; 18. Fourth rotating groove; 19. First gear; 20. Second gear; 21. Sealing groove; 22. First sealing strip; 23. Second sealing strip. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] Reference Figure 1-6 This utility model provides an exhaust fan outlet baffle door, which includes a door panel 1. The door panel 1 has a slot 11, a first sealing plate 7 is movably connected in the slot 11, and symmetrical second sealing plates 8 are movably connected in the slot 11. The first sealing plate 7 is movably connected to the second sealing plate 8. A rotating shaft 2 is fixedly connected to the side of the door panel 1, and a door handle 3 is fixedly connected to the door panel 1 to ensure that it can fit tightly when needed, effectively isolate airflow, and prevent leakage.

[0027] Specifically: a sealing strip 9 is fixedly connected to the door panel 1, a rotating seat 10 is fixedly connected to the door panel 1, a third rotating groove 17 is opened on the sealing strip 9, and a fourth rotating groove 18 is opened on the sealing strip 9.

[0028] Specifically: a first rotating groove 14 is provided on the first sealing plate 7, and a second rotating groove 15 is provided on the second sealing plate 8.

[0029] Specifically: a first rotating rod 12 is movably connected in the third rotating groove 17, the fourth rotating groove 18, and the first rotating groove 14; a symmetrical second rotating rod 13 is movably connected in the third rotating groove 17, the fourth rotating groove 18, and the second rotating groove 15; one end of the first rotating rod 12 and the second rotating rod 13 is fixedly connected to a limiting block 16; and the other side of the limiting block 16 is movably connected to a sealing strip 9.

[0030] Specifically: the other end of the first rotating rod 12 is fixedly connected to the first gear 19, and the other end of the second rotating rod 13 is correspondingly fixedly connected to the second gear 20. The first gear 19 and the second gear 20 are fitted with a rotating belt 4 that is movably connected, ensuring the smooth operation of the entire transmission system.

[0031] Specifically: a gear platform 5 is fixedly connected inside the rotating belt 4, and the gear platform 5 is movably connected to the first gear 19 and the second gear 20. A rotating handle 6 is fixedly connected to the side of the first gear 19.

[0032] Specifically: sealing grooves 21 are provided on the first sealing plate 7 and the second sealing plate 8. A first sealing strip 22 is fixedly connected to the first sealing plate 7, and a second sealing strip 23 is fixedly connected to the second sealing plate 8. The first sealing strip 22 and the second sealing strip 23 are movably connected to the sealing grooves 21, which improves the safety and economy of the unit operation.

[0033] Working principle:

[0034] The door panel 1, as the main structure of the entire baffle door, has a slot 11 that provides space for the movement of the first sealing plate 7 and the second sealing plate 8. The sealing plates are connected in a specific way to ensure a tight fit when needed, effectively isolating airflow and preventing leakage. This enhances sealing performance and improves the adaptability and durability of the baffle door. A sealing strip 9 and a rotating seat 10 are also fixed to the door panel 1, providing support for the stable rotation of the sealing plates. The third rotating slot 17 and the fourth rotating slot 18 on the sealing strip 9, along with the first rotating slot 14 on the first sealing plate 7 and the second rotating slot 15 on the second sealing plate 8, together constitute a precise rotation mechanism. In this mechanism, the first rotating rod 12 and the second rotating rod 13 play a crucial role. They are movably connected within the aforementioned rotating slots, with one end connected to the sealing strip 9 via a limiting block 16, and the other end fixedly connected to the first gear 19 and the second gear 20, respectively. The limiting block 16 effectively prevents the rotating rods from falling off, ensuring the stability and safety of the structure. The first gear 19 is driven to rotate by rotating the handle 6. Since a rotating belt 4 is movably connected between the first gear 19 and the second gear 20, and a gear platform 5 is fixed inside the rotating belt 4, the gear platform 5 maintains a good movable connection with both the first gear 19 and the second gear 20. Therefore, the rotation of the first gear 19 synchronously drives the rotation of the second gear 20. This ensures the smooth operation of the entire system and enables the synchronous opening or closing of the first sealing plate 7 and the second sealing plate 8. Sealing grooves 21 are formed on the first sealing plate 7 and the second sealing strip 23 are fixed on the first sealing plate 7 and the second sealing strip 23, respectively. The movable connection of these two sealing strips within the sealing grooves 21 further enhances the sealing performance of the baffle door. When the sealing plates are tightly fitted, the sealing strips are embedded in the sealing grooves 21, forming a solid sealing barrier that effectively isolates airflow and prevents leakage.

[0035] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A damper gate at the outlet of an induced draft fan, comprising a gate panel (1), characterized in that: The door panel (1) has a slot (11) and a first sealing plate (7) is movably connected in the slot (11). A symmetrical second sealing plate (8) is movably connected in the slot (11). The first sealing plate (7) is movably connected to the second sealing plate (8). A rotating shaft (2) is fixedly connected to the side of the door panel (1). A door handle (3) is fixedly connected to the door panel (1).

2. The exhaust fan outlet damper according to claim 1, characterized in that, A sealing strip (9) is fixedly connected to the door panel (1), a rotating seat (10) is fixedly connected to the door panel (1), a third rotating groove (17) is opened on the sealing strip (9), and a fourth rotating groove (18) is opened on the sealing strip (9).

3. The exhaust fan outlet damper according to claim 2, characterized in that, The first sealing plate (7) has a first rotating groove (14), and the second sealing plate (8) has a second rotating groove (15).

4. The exhaust fan outlet damper according to claim 3, characterized in that, A first rotating rod (12) is movably connected in the third rotating groove (17), the fourth rotating groove (18), and the first rotating groove (14). A symmetrical second rotating rod (13) is movably connected in the third rotating groove (17), the fourth rotating groove (18), and the second rotating groove (15). One end of the first rotating rod (12) and the second rotating rod (13) is fixedly connected to a limiting block (16), and the other side of the limiting block (16) is movably connected to a sealing strip (9).

5. The exhaust fan outlet damper according to claim 4, characterized in that, The other end of the first rotating rod (12) is fixedly connected to the first gear (19), and the other end of the second rotating rod (13) is correspondingly fixedly connected to the second gear (20). The first gear (19) and the second gear (20) are fitted with a rotating belt (4) that is movably connected.

6. The exhaust fan outlet damper according to claim 5, characterized in that, A gear platform (5) is fixedly connected inside the rotating belt (4). The gear platform (5) is movably connected to the first gear (19) and the second gear (20). A rotating handle (6) is fixedly connected to the side of the first gear (19).

7. The exhaust fan outlet damper according to claim 1, characterized in that, The first sealing plate (7) and the second sealing plate (8) are provided with sealing grooves (21). The first sealing plate (7) is fixedly connected with a first sealing strip (22), and the second sealing plate (8) is fixedly connected with a second sealing strip (23). The first sealing strip (22) and the second sealing strip (23) are movably connected to the sealing groove (21).

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