Corner type sealing isolation door for hot air duct

Abstract

The utility model discloses a hot air duct corner type sealing isolation door which comprises an air duct, a door frame is arranged in the air duct and located in one end of an air outlet of the air duct, the periphery of the door frame and the periphery of the air duct are connected in a sealed mode, a door plate mechanism is arranged in the door frame and comprises an inner container and a shell, and an expansion joint is arranged at the joint of the inner container and the shell. The upper edge of the door plate mechanism is hinged to the door frame, and sealing strips are arranged at the connecting positions of the door plate mechanism and the four faces of the door frame. According to the utility model, the door plate mechanism is connected with the connecting rod, the driven arm, the driving arm, the bearing seat, the rotating rod and the cylinder, so that the opening of the isolation door is mechanically and automatically turned over, and when the door plate is closed or opened, friction between the door plate and the sealing strip is avoided, so that the sealing strip is difficult to damage; the expansion joint is arranged between the inner container and the shell of the door plate mechanism, thermal deformation of the door plate is avoided, and the sealing strip is arranged to guarantee the sealing performance of the isolation door.

Description

Technical Field

[0001] This utility model relates to the field of sealed isolation doors, specifically to a hot air duct corner sealed isolation door. Background Technology

[0002] The hot air duct corner sealing isolation door (also known as a flap isolation door, hot air flap isolation door, flap door, etc.) is a type of valve commonly used in industrial pipeline systems. It is mainly used to cut off or regulate the flow of media such as airflow and flue gas. This type of valve is widely used in many fields, such as power, metallurgy, and chemical industries, due to its simple structure, convenient operation, and high cost-effectiveness.

[0003] Currently, most hot air duct corner isolation doors used are slide-in type. These doors consist of a door frame and a door panel. The door frame is fixed at the machine entrance. To prevent hot air from entering the machine during inspection and maintenance, a sealing strip is installed between the door panel and the door frame around the perimeter. Since the seal between the door panel and the frame is achieved through this sealing strip, prolonged opening and closing of the door panel causes wear and tear on the strip, resulting in a short lifespan. Furthermore, since the door panel is opened and closed via a power mechanism connected to one side of the door panel, only one side of the panel bears force during this process, making it prone to thermal deformation. Once the door panel deforms, the sealing effect deteriorates, and the flexibility of the door panel is reduced, affecting work efficiency.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a corner sealing and isolation door for hot air ducts to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A hot air duct corner-type sealed isolation door includes an air duct, a door frame is provided inside the air duct, the door frame is located inside one end of the air outlet of the air duct and the two are sealed together on all four sides; a door panel mechanism is provided inside the door frame.

[0008] The door panel mechanism includes an inner liner and an outer shell. An expansion joint is provided at the connection between the inner liner and the outer shell. A threaded hole is provided at the connection between the expansion joint and the outer shell, and a screw is provided in the threaded hole.

[0009] The top of the door panel mechanism is hinged to the door frame. Sealing strips are provided at the four connection points between the door panel mechanism and the door frame. Support plates are connected to the top two sides of the air duct. A locking mechanism is provided at the end of the support plates away from the air outlet of the air duct.

[0010] Furthermore, in order to lock the sealed isolation door after sealing, the locking mechanism includes a locking rod with a locking groove in the middle. The two ends of the locking rod are respectively placed in square grooves opened at corresponding positions on the support plate. A support block is provided in the square groove. A lifting groove is opened at the bottom of the support block. A positioning groove is opened on one side of the lifting groove. A moving groove is opened at the square groove of the support plate. The moving groove passes through one side of the square groove and the lifting groove. A moving rod is provided in the moving groove. One end of the moving rod passes through the moving groove and connects to the support block.

[0011] Furthermore, the rear section of the air duct is higher than the front section. Vertical beams are provided on both sides of the top of the rear section of the air duct, and a crossbeam is connected between the two vertical beams. A cylinder is provided on one side of the crossbeam, and the cylinder and the crossbeam are hinged together by a connecting rod. Bearing seats are provided on both sides of the top of the front section, and a rotating rod is connected between the two bearing seats.

[0012] Furthermore, in order to enable the sealed isolation door to flip, a piston rod is connected to the telescopic end of the cylinder. The piston rod is connected to one end of the active arm through a pin. The other end of the active arm is fixedly connected to the middle of the rotating rod. Both sides of the active arm are provided with driven arms. One end of the driven arm is fixedly connected to the rotating rod, and the other end of the driven arm passes through the air duct and is connected to the connecting rod through a pin.

[0013] Furthermore, there are two pairs of connecting rods, and the door panel mechanism has two raised ribs on the side away from the air outlet of the air duct.

[0014] Furthermore, the raised ribs are provided with pin holes, and pins are provided in the pin holes. The two raised ribs correspond to a pair of connecting rods, and the connecting rods are connected to the raised ribs through the pins.

[0015] Furthermore, the locking mechanism is located above the active arm.

[0016] The beneficial effects of this utility model are as follows: By connecting the linkage, driven arm, driving arm, bearing seat, rotating rod, and cylinder on the door panel mechanism, the opening of the isolation door is mechanized and automated. During the closing or opening process, no friction occurs between the door panel and the sealing strip, making the sealing strip less prone to damage. By setting a heat deformation absorption expansion joint between the inner liner and the outer shell of the door panel mechanism, heat deformation of the door panel is avoided. The sealing strip between the door panel mechanism and the door frame ensures the sealing performance of the isolation door. The flip-sealed isolation door is equipped with a locking mechanism with an independent control unit. The operator can lock and open the door panel mechanism by moving the moving rod, avoiding misoperation. At the same time, the door panel mechanism being locked in the door frame also indirectly improves its sealing performance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a hot air duct corner sealing isolation door according to an embodiment of the present utility model;

[0019] Figure 2 This is a structural diagram of a locking mechanism in a corner-type sealing and isolation door for hot air ducts according to an embodiment of the present utility model;

[0020] Figure 3 This is a detailed drawing of the locking mechanism in a corner-type sealing and isolation door for hot air ducts according to an embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional view of the door panel mechanism of a hot air duct corner sealing isolation door according to an embodiment of the present utility model;

[0022] Figure 5 This is a rear view of a corner-type sealing and isolation door for hot air ducts according to an embodiment of the present utility model;

[0023] Figure 6 This is a structural diagram of an expansion joint in a corner-type sealing and isolation door for a hot air duct according to an embodiment of the present utility model;

[0024] Figure 7 This is a diagram showing the positions of the lifting groove and positioning groove in a corner-type sealing and isolation door for hot air ducts according to an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Air duct; 2. Door frame; 3. Door panel mechanism; 301. Inner liner; 302. Expansion joint; 303. Outer shell; 4. Connecting rod; 5. Driven arm; 6. Rotating rod; 7. Bearing seat; 8. Driving arm; 9. Locking mechanism; 901. Locking rod; 902. Locking groove; 903. Moving rod; 904. Moving groove; 905. Positioning groove; 906. Support block; 907. Lifting groove; 10. Piston rod; 11. Support plate; 12. Cylinder; 13. Connecting rod; 14. Crossbeam; 15. Vertical beam; 16. Rib. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] According to an embodiment of the present invention, a hot air duct corner sealing and isolation door is provided.

[0029] Example 1;

[0030] like Figures 1-5As shown, a hot air duct corner-type sealed isolation door according to an embodiment of the present invention includes an air duct 1, a door frame 2 inside the air duct 1, the door frame 2 being located inside one end of the air outlet of the air duct 1 and the two being sealed together around the perimeter, a door panel mechanism 3 inside the door frame 2, the door frame 2 and the outer shell 303 of the door panel mechanism 3 being a metal hard-seal structure, the sealing surface of which is made of D507Mo high temperature and wear resistant welding rod after heat treatment and precision machining and grinding, ensuring tight closure in both hot and cold states, the door panel mechanism 3 including an inner liner 301 and an outer shell 303, an FGFB heat deformation absorption expansion joint 302 being provided at the connection between the inner liner 301 and the outer shell 303, which can effectively absorb deformation differences, thereby avoiding heat deformation of the door panel, the expansion joint 302 and the outer shell 303 are connected. 3. Threaded holes are present at the connection points, with screws installed inside. The outer casing 303 is tightly connected to the expansion joint 302 via screws. The upper part of the door panel mechanism 3 is hinged to the door frame 2. Sealing strips are provided at the four connection points between the door panel mechanism 3 and the door frame 2. Support plates 11 are connected to the top two sides of the air duct 1. A locking mechanism 9 is provided at the end of the support plates 11 away from the air outlet of the air duct 1. The locking mechanism 9 includes a locking rod 901. A locking groove 902 is opened in the middle of the locking rod 901. The two ends of the locking rod 901 are respectively placed in square grooves opened at corresponding positions on the support plates 11. Support blocks 906 are provided in the square grooves. A lifting groove 907 slightly larger than its size is opened at the bottom of the support block 906. A lifting groove 907 of the same size is opened on one side of the lifting groove 907. The positioning groove 905, though slightly smaller in height, is located on the same side of the lifting grooves 907 on both sides. A moving groove 904 is provided in the square groove of the support plate 11, penetrating both the square groove and one side of the lifting groove 907. A moving rod 903 is installed inside the moving groove 904, with one end passing through the moving groove 904 and connecting to the support block 906. With the flip-top sealing door closed, the operator moves the moving rod 903 down within the moving groove 904, causing the support block 906 to fall into the lifting groove 907. At this time, the locking rod 901, supported by the support block 906, falls vertically to the bottom of the square groove, and the locking groove 902 in the middle locks onto one side of the active arm 8, thus locking the active arm 8. When the flip-top sealed door needs to be opened, the operator moves the moving rod 903 upwards. The moving rod 903 drives the support block 906 to extend out of the lifting groove 907. When the support block 906 is fully extended, the moving rod 903 is then gently pushed inwards, causing the support block 906 to fall into the positioning groove 905. The height of the positioning groove 905 is one-sixth of the height of the lifting groove 907. When the support block 906 moves upwards, it pushes the locking rod 901 upwards, at which point the locking mechanism 9 is released. The locking mechanism 9 can achieve the locking and opening of the door panel mechanism 3, avoiding accidental operation. At the same time, the door panel mechanism 3 being locked in the door frame 2 also indirectly improves its sealing performance. Manual operation of the locking mechanism avoids mechanical problems that could lead to the door being locked or unable to be locked.

[0031] Example 2;

[0032] like Figure 1 and Figure 5 As shown, a hot air duct corner-type sealing and isolation door according to an embodiment of the present invention includes an air duct 1. The rear section of the air duct 1 is higher than the front section. Vertical beams 15 are provided on both sides of the top of the rear section of the air duct 1. A horizontal beam 14 is connected between the two vertical beams 15. A cylinder 12 is provided on one side of the horizontal beam 14. The cylinder 12 and the horizontal beam 14 are hinged together by a connecting rod 13. Bearing seats 7 are provided on both sides of the top of the front section. A rotating rod 6 is connected between the two bearing seats 7. A piston rod 10 is connected to the telescopic end of the cylinder 12. The piston rod 10 is connected to one end of the active arm 8 by a pin. The other end of the active arm 8 is fixedly connected to the middle of the rotating rod 6. A driven arm 5 is provided on both sides of the active arm 8. One end of the driven arm 5 is fixedly connected to the rotating rod 6. The other end of the driven arm 5 passes through the air duct 1 and is connected to a connecting rod 4 by a pin. There are two pairs of ribs 16 on the side of the door panel mechanism 3 away from the air outlet of the air duct 1. There are two ribs 16, and pin holes are opened on the ribs 16. A pin shaft is installed in the pin hole. The two ribs 16 correspond to a pair of connecting rods 4 respectively. The connecting rods 4 are connected to the ribs 16 through the pin shaft. By connecting the connecting rods 4, driven arm 5, driving arm 8, bearing seat 7, rotating rod 6, and cylinder 12 on the door panel mechanism 3, the opening of the isolation door is mechanized and automatically flipped. During the closing or opening process, no friction is generated between the door panel and the sealing strip, so that the sealing strip is not easily damaged. All the above connecting shafts are made of tin bronze bushings and stainless steel shafts. Solid lubricant is added for lubrication during use. Its shaft seal is a high temperature resistant oil-free self-lubricating ellipsoidal self-adjusting shaft seal, which ensures the flexibility of the door panel mechanism 3 in flipping and long-term reliability.

[0033] In summary, with the help of the above-mentioned technical solution of this utility model, when the cylinder 12 drives the piston rod 10 to extend, the active arm 8, the rotating rod 6, and the driven arm 5 rotate counterclockwise together, and the door panel mechanism 3 is separated from the door frame 2 through the connecting rod 4; when the cylinder 12 drives the piston push rod to retract, the active arm 8, the rotating rod 6, and the driven arm 5 rotate clockwise together, and the door panel mechanism 3 is closed from the door frame 2 through the connecting rod 4; when the door panel mechanism 3 and the door frame 2 are closed, the operator moves the moving rod 903 to lower the locking rod 901, thereby causing the active arm 8 to be stuck in the lock groove 902 and unable to operate. At this time, the operator can carry out maintenance work. After the maintenance is completed, the moving rod 903 is moved in the opposite direction to lift the locking rod 901 and support it with the support block 906, and the active arm 8 can start to operate.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corner-type sealed isolation door for hot air ducts, characterized in that, It includes an air duct (1), and a door frame (2) is provided inside the air duct (1). The door frame (2) is located inside the air outlet of the air duct (1) and the two are connected in a sealed manner around the perimeter; a door panel mechanism (3) is provided inside the door frame (2). The door panel mechanism (3) includes an inner liner (301) and an outer shell (303). An expansion joint (302) is provided at the connection between the inner liner (301) and the outer shell (303). A threaded hole is provided at the connection between the expansion joint (302) and the outer shell (303). A screw is provided in the threaded hole. The upper part of the door panel mechanism (3) is hinged to the door frame (2). Sealing strips are provided at the four-sided connection between the door panel mechanism (3) and the door frame (2). Support plates (11) are connected to the top two sides of the air duct (1). A locking mechanism (9) is provided at the end of the support plates (11) away from the air outlet of the air duct (1).

2. The corner sealing and isolation door for hot air ducts according to claim 1, characterized in that, The locking mechanism (9) includes a locking rod (901), a locking groove (902) is provided in the middle of the locking rod (901), and the two ends of the locking rod (901) are respectively placed in square grooves opened at corresponding positions on the support plate (11). A support block (906) is provided in the square groove. A lifting groove (907) is provided at the bottom of the support block (906). A positioning groove (905) is provided on one side of the lifting groove (907). A moving groove (904) is provided at the square groove of the support plate (11). The moving groove (904) passes through one side of the square groove and the lifting groove (907). A moving rod (903) is provided in the moving groove (904). One end of the moving rod (903) passes through the moving groove (904) and is connected to the support block (906).

3. The corner sealing and isolation door for hot air ducts according to claim 1, characterized in that, The rear section of the air duct (1) is higher than the front section. Vertical beams (15) are provided on both sides of the top of the rear section of the air duct (1). A crossbeam (14) is connected between the two vertical beams (15). A cylinder (12) is provided on one side of the crossbeam (14). The cylinder (12) and the crossbeam (14) are hinged together by a connecting rod (13). Bearing seats (7) are provided on both sides of the top of the front section. A rotating rod (6) is connected between the two bearing seats (7).

4. A corner-type sealing and isolation door for hot air ducts according to claim 3, characterized in that, The cylinder (12) is connected to a piston rod (10) at its telescopic end. The piston rod (10) is connected to one end of the active arm (8) via a pin. The other end of the active arm (8) is fixedly connected to the middle of the rotating rod (6). Both sides of the active arm (8) are provided with driven arms (5). One end of the driven arm (5) is fixedly connected to the rotating rod (6). The other end of the driven arm (5) passes through the air duct (1) and is connected to the connecting rod (4) via a pin.

5. A corner-type sealing and isolation door for hot air ducts according to claim 4, characterized in that, There are two pairs of connecting rods (4). The door panel mechanism (3) is provided with a rib (16) on the side away from the air outlet of the air duct (1). There are two ribs (16).

6. A corner-type sealing and isolation door for hot air ducts according to claim 5, characterized in that, The protruding rib (16) has a pin hole, and a pin is provided in the pin hole. The two protruding ribs (16) correspond to a pair of connecting rods (4) respectively. The connecting rods (4) are connected to the protruding ribs (16) through the pin.

7. A corner-type sealing and isolation door for hot air ducts according to claim 2, characterized in that, The locking mechanism (9) is located above the active arm (8).

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