Sealing shut-off damper

Abstract

Disclosed is a sealing shut-off damper, comprising a frame body (1), a row of louver dampers (3) connected to the frame body (1) by means of rotating shafts (2), and a rotating shaft driving device (4) provided on one side of the frame body (1) and used for driving the louver dampers (3) to rotate synchronously. Every two adjacent louver dampers (3) are connected by means of two flexible sealing sheets (5) that are arranged in the length direction of the louver dampers (3) and are partially overlapped and fitted. The side of each flexible sealing sheet (5) distant from the corresponding louver damper (3) is provided with a sealing sheet pressing plate (6) used for preventing the flexible sealing sheet (5) from deforming, and the sealing sheet pressing plate (6) fastens, by means of fixing bolts (7), the flexible sealing sheet (5) on the louver damper (3) adjacent to the sealing sheet pressing plate (6). The sealing sheet pressing plates enable the flexible sealing sheets to maintain the characteristics of elastic deformation and prevent the flexible sealing sheets from deforming due to excessive stress, thereby maintaining the sealing effect of the damper.

Description

A sealed shutoff baffle Technical Field

[0001] The utility model relates to a sealed shut-off baffle, belonging to the technical field of baffle doors. Background Art

[0002] The front and rear air ducts of the six major fans in thermal power plants typically utilize louvered inlet and outlet dampers. After long periods of operation, these dampers can experience deformation of the external lever arm and poor damper synchronization, resulting in poor damper tightness when closed. When a fan is operating on one side, even if the inlet and outlet dampers of the fan on the other side are fully closed, a large amount of smoke and air medium will still leak through the damper, causing the fan to reverse and unable to meet startup conditions. This is especially true when emergency repairs are being performed on the induced draft fan while the air and smoke system is operating on one side, as smoke leaks through the damper, making repairs difficult.

[0003] A Chinese patent with announcement number CN201852122U discloses a double-blade louver-type flue baffle door, comprising a door frame and an inner anti-corrosion layer, a plurality of blades horizontally arranged in the door frame from top to bottom through a rotating shaft, and a rotating shaft drive mechanism arranged on the outside of the door frame; the blades are a sandwich structure composed of two rectangular plates; corrosion-resistant elastic sealing strips are respectively provided on the upper and lower edges of the two rectangular plates; an air inlet communicating with the inner cavity of the blade sandwich and an opening and closing valve for controlling the passage of sealing air are provided on the top beam of the door frame; the blade rotating shaft located at the top of the door frame is hinged to the crank of the valve through a connecting rod; it achieves a sealing effect through the cooperation of the elastic sealing strip and the sealing air, but the sealing air will leak to the fan, causing the fan to reverse, especially if the blade opening is adjusted too much, the combined action of the sealing air and the flue gas will cause the fan to reverse at high speed.

[0004] Utility Model Content

[0005] In order to overcome the above problems, the utility model provides a sealing shut-off baffle, which uses a sealing plate pressure plate to enable the flexible sealing plate to maintain its elastic deformation characteristics while preventing it from being deformed due to excessive force, so as to maintain the sealing effect of the baffle.

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

[0007] A sealed shut-off baffle comprises a frame, a row of louver baffles connected to the frame via a rotating shaft, and a rotating shaft driving device arranged on one side of the frame for driving the louver baffles to rotate synchronously; two adjacent louver baffles are connected by two overlapping and fitted flexible sealing sheets arranged along their length directions; each of the flexible sealing sheets is provided with a sealing sheet pressing plate on the side away from the louver baffle to prevent its deformation, and the sealing sheet pressing plate fastens the flexible sealing sheet to the adjacent louver baffle via fixing bolts.

[0008] Furthermore, the two flexible sealing sheets are each provided with a bending portion on one side opposite to the other, and the bending portion is bent in a direction close to the adjacent flexible sealing sheet; the bending portions on the two flexible sealing sheets overlap and fit each other; and the separated sides of the two flexible sealing sheets are respectively fixedly connected to the adjacent louver baffles by fixing bolts.

[0009] Furthermore, the sealing sheet pressing plate is provided with a pressing plate bending portion that is adapted to the shape of the bending portion, and the width of the pressing plate bending portion is smaller than the width of the bending portion.

[0010] Furthermore, the fixing bolt passes through the adjacent louver baffle, the flexible sealing sheet, and the sealing sheet pressure plate in sequence and is then locked with the thrust nut.

[0011] Furthermore, the two flexible sealing sheets are placed on different sides of the two adjacent louver baffles, wherein one flexible sealing sheet is placed on the inner edge side of the adjacent louver baffle, and the other flexible sealing sheet is placed on the outer edge side of the adjacent louver baffle.

[0012] Furthermore, one end of each rotating shaft is rotatably connected to the frame, and the other end of the rotating shaft passes through the frame and is fixedly connected to the crank; each rotating shaft is fixedly connected to the louver baffle.

[0013] Furthermore, the shaft driving device includes a connecting rod and a driving electric head for driving the crank to rotate around the adjacent shaft; each crank is symmetrically provided with two force arms fixedly connected to it; the force arms with opposite positions in adjacent cranks are hinged to each other through the connecting rod; the driving electric head is fixedly connected to the middle of the side surface of the frame, and the output end of the driving electric head is fixedly connected to the crank placed in the middle of the side surface of the frame.

[0014] Furthermore, the surfaces of the crank away from the frame are concave to form grooves for reflecting the openings of the adjacent louvers, and the grooves are parallel to the cross sections of the adjacent louvers.

[0015] Furthermore, the frame is provided with two symmetrically arranged hanging holes fixedly connected to one end portion of the connecting rod, and the two hanging holes respectively correspond to the adjacent force arm positions.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model improves the sealing effect by arranging two overlapping and mutually fitting flexible sealing sheets between two adjacent louver baffles, and makes a sealing sheet pressure plate adapted to the shape of the flexible sealing sheet fixedly connect the flexible sealing sheet to the adjacent louver baffles through fixing bolts, so that when the louver baffle slightly sweeps over, the flexible sealing sheet maintains sealing performance through its elastic deformation characteristics, and prevents the flexible sealing plate from being deformed due to excessive force when the louver baffle sweeps over. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram showing the connection structure of two adjacent louver baffles.

[0019] FIG2 is a front view of the present utility model.

[0020] FIG3 is a side view of the present utility model.

[0021] FIG4 is a side view of the crank. [0021.1][Corrected 23.07.2024 according to Rule 91] Figure 5 is a schematic diagram of the structure of the hand chain hoist connecting the lifting eye and the lever arm.

[0022] The reference numerals in the figures are as follows:

[0023] 1. Frame; 11. Lifting hole; 12. Hand chain hoist; 2. Rotating shaft; 3. Louver baffle; 31. Inner edge side; 32. Outer edge side; 4. Rotating shaft drive device; 41. Connecting rod; 42. Driving electric head; 5. Flexible sealing sheet; 51. Bending part; 6. Sealing sheet pressure plate; 61. Bending part of pressure plate; 7. Fixing bolt; 8. Thrust nut; 9. Crank; 91. Lever; 92. Groove. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] [Corrected on 23.07.2024 according to Rule 91] Referring to Figures 1-5, a sealed shut-off baffle comprises a frame 1, a row of louver baffles 3 connected to the frame 1 via a rotating shaft 2, and a rotating shaft driving device 4 arranged on one side of the frame 1 for driving the louver baffles 3 to rotate synchronously; two adjacent louver baffles 3 are connected by two overlapping and fitted flexible sealing sheets 5 arranged along their length directions; each of the flexible sealing sheets 5 is provided with a sealing sheet pressing plate 6 on the side away from the louver baffle 3 to prevent its deformation, and the sealing sheet pressing plate 6 fastens the flexible sealing sheet 5 to the adjacent louver baffle 3 via fixing bolts 7.

[0026] Furthermore, a bending portion 51 is provided on each opposite side of the two flexible sealing sheets 5, and the bending portion 51 is bent in a direction close to the adjacent flexible sealing sheet 5; the bending portions 51 on the two flexible sealing sheets 5 overlap and fit each other; and the separated sides of the two flexible sealing sheets 5 are respectively fixedly connected to the adjacent louver baffle 3 by fixing bolts 7.

[0027] Furthermore, the sealing sheet pressing plate 6 is provided with a pressing plate bending portion 61 that is adapted to the shape of the bending portion 51 , and the width of the pressing plate bending portion 61 is smaller than the width of the bending portion 51 .

[0028] Furthermore, the fixing bolt 7 passes through the adjacent louver baffle 3, the flexible sealing sheet 5, and the sealing sheet pressing plate 6 in sequence and is then locked with the thrust nut 8.

[0029] Furthermore, the two flexible sealing sheets 5 are placed on different sides of the two adjacent louver baffles 3, wherein one flexible sealing sheet 5 is placed on the inner edge side 31 of the adjacent louver baffle 3, and the other flexible sealing sheet 5 is placed on the outer edge side 32 of the adjacent louver baffle 3.

[0030] Furthermore, one end of each of the rotating shafts 2 is rotatably connected to the frame 1 , and the other end of the rotating shaft 2 passes through the frame 1 and is fixedly connected to the crank 9 ; and each of the rotating shafts 2 is fixedly connected to the louver baffle 3 .

[0031] Furthermore, the shaft driving device 4 includes a connecting rod 41 and a driving electric head 42 for driving the crank 9 to rotate around the adjacent shaft 2; each crank 9 is symmetrically provided with two force arms 91 fixedly connected thereto; the force arms 91 with opposite positions in adjacent cranks 9 are hinged to each other through the connecting rod 41, so that the force between the force arms 91 is more uniform, avoiding the twisting and deformation of the force arms 91; the driving electric head 42 is fixedly connected to the middle part of the side surface of the frame 1, and the output end of the driving electric head 42 is fixedly connected to the crank 9 located in the middle part of the side surface of the frame 1, which can make the transmission between the connecting rods 41 more convenient, and reduce the idle stroke of the inverted gap of the connecting rod 41, reduce the asynchronism of the louver baffle 3, and also reduce the resistance during the transmission process.

[0032] Furthermore, the surfaces of the crank 9 away from the frame 1 are concave to form grooves 92 for reflecting the opening of the adjacent louver baffles 3 , and the grooves 92 are parallel to the cross sections of the adjacent louver baffles 3 .

[0033] Furthermore, the frame 1 is provided with two symmetrically arranged hanging holes 11 fixedly connected to one end portion of the connecting rod 41 , and the two hanging holes 11 correspond to the positions of the adjacent force arms 91 respectively.

[0034] The working principle of this utility model:

[0035] [Corrected on 23.07.2024 according to Rule 91] Refer to Figure 1-5. When the louver baffle 3 is closed, the driving electric head 42 is started to rotate the crank 9 connected to it, and the rotating shaft 2 is rotated accordingly under the drive of the connecting rod 41, and the louver baffle 3 is closed. At this time, the bending parts 51 on the flexible sealing sheets 5 between adjacent louver baffles 3 are facing relative and partially overlapped to improve the sealing effect; at the same time, the grooves 92 arranged on the surface of each crank 9 away from the frame 1 are parallel to the vertical interface of the adjacent louver baffle 3, so as to intuitively reflect the opening adjustment state of the louver baffle 3 connected to each crank 9.

[0036] The flexible sealing sheet 5 can be made of 2mm 304 stainless steel. The use of a flexible sealing sheet 5 with a smaller thickness can allow the louver baffle 3 to have a certain amount of interference, and can elastically deform when the louver baffle 3 is slightly overclosed, thereby ensuring the sealing effect; the sealing sheet pressure plate 6 can be made of 4mm Q235 carbon steel. By making the shape of the sealing sheet pressure plate 6 match the shape of the flexible sealing sheet 5, the width of the pressure plate bending portion 61 is made smaller than the width of the bending portion 51. While maintaining the elasticity of the flexible sealing sheet 5, it can better help to keep the flexible sealing sheet 5 from being easily deformed due to excessive force.

[0037] When the louver baffle 3 is stuck in rotation, the two force arms 91 connected to it are connected to the corresponding hanging holes 11 through the hand hoist 12 respectively, and the hand hoist 12 is used to pull the force arm 91 to rotate the rotating shaft, thereby moving the louver baffle 3 and making it active again.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sealed shut-off baffle, comprising a frame (1), a row of louver baffles (3) connected to the frame (1) via a rotating shaft (2), and a rotating shaft driving device (4) arranged on one side of the frame (1) for driving the louver baffles (3) to rotate synchronously, characterized in that: Two adjacent louver baffles (3) are connected via two overlapping flexible sealing sheets (5) arranged along their length direction; each flexible sealing sheet (5) is provided with a sealing sheet pressing plate (6) on the side away from the louver baffle (3) for preventing the flexible sealing sheet (5) from deforming, and the sealing sheet pressing plate (6) fastens the flexible sealing sheet (5) to the adjacent louver baffle (3) via fixing bolts (7).

2. A sealing shutoff baffle according to claim 1, characterized in that: The two flexible sealing sheets (5) are each provided with a bending portion (51) on one side opposite to the other, and the bending portion (51) is bent in a direction close to the adjacent flexible sealing sheet (5); the bending portions (51) on the two flexible sealing sheets (5) overlap and fit each other; and the separated sides of the two flexible sealing sheets (5) are respectively fixedly connected to the adjacent louver baffle (3) via fixing bolts (7).

3. A sealing shutoff baffle according to claim 2, characterized in that: The sealing sheet pressing plate (6) is provided with a pressing plate bending portion (61) whose shape matches that of the bending portion (51), and the width of the pressing plate bending portion (61) is smaller than the width of the bending portion (51).

4. The sealing shutoff baffle according to claim 1, characterized in that: The fixing bolt (7) passes through the adjacent louver baffle (3), the flexible sealing sheet (5), and the sealing sheet pressing plate (6) in sequence and is then locked with the thrust nut (8).

5. The sealing shutoff baffle according to claim 2, characterized in that: The two flexible sealing sheets (5) are placed on different sides of the two adjacent louver baffles (3), wherein one of the flexible sealing sheets (5) is placed on the inner edge side (31) of the adjacent louver baffle (3), and the other flexible sealing sheet (5) is placed on the outer edge side (32) of the adjacent louver baffle (3).

6. The sealing shutoff baffle according to claim 1, characterized in that: One end of each rotating shaft (2) is rotatably connected to the frame (1), and the other end of the rotating shaft (2) passes through the frame (1) and is fixedly connected to the crank (9); each rotating shaft (2) is fixedly connected to the shutter baffle (3).

7. A sealing shutoff baffle according to claim 6, characterized in that: The rotating shaft driving device (4) comprises a connecting rod (41) and a driving electric head (42) for driving the crank (9) to rotate around the rotating shaft (2) adjacent thereto; each crank (9) is symmetrically provided with two force arms (91) fixedly connected thereto; the force arms (91) in opposite positions in adjacent cranks (9) are hinged to each other through the connecting rod (41); the driving electric head (42) is fixedly connected to the middle of the side surface of the frame (1), and the output end of the driving electric head (42) is fixedly connected to the crank (9) disposed in the middle of the side surface of the frame (1).

8. The sealing shutoff baffle according to claim 7, characterized in that: The surfaces of the crank (9) away from the frame (1) are concave to form grooves (92) for reflecting the opening of the adjacent louver baffles (3); the grooves (92) are parallel to the cross-sections of the adjacent louver baffles (3).

9. The sealing shutoff baffle according to claim 8, characterized in that: The frame (1) is provided with one end portion of the connecting rod (41) fixedly connected to two symmetrically arranged hanging holes (11), and the two hanging holes (11) respectively correspond to the positions of the adjacent force arms (91).

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