High-temperature-resistant turn-off check valve

Abstract

The utility model relates to the technical field of air doors, and discloses a high-temperature-resistant turn-off check door which comprises a door frame, bearing supports are fixedly installed at the upper end and the lower end of the door frame respectively, an air inlet short pipe is fixedly installed on the right side of an air inlet cavity, and a door plate is arranged on the left side of a shaft pipe. According to the high-temperature-resistant turn-off check valve, external cooling air enters the air inlet cavity from the air inlet short pipe, enters the shaft pipe from the ventilation holes in the periphery of the upper shaft pipe, then flows through the upper-layer door plate cooling air pipe bundle, flows out to the lower shaft pipe from the lower-layer door plate cooling air pipe bundle and flows into the air outlet cavity from the ventilation holes in the periphery of the lower shaft pipe; and finally, the air flows out from the air outlet short pipe. By means of the structural design, part of heat on the shaft pipe and the door plate can be effectively carried away along with flowing of cooling air, so that the thermal deformation of the shaft pipe and the door plate is reduced, it is guaranteed that the shut-off check door can be used in a high-temperature flue gas pipeline, and it is guaranteed that opening or closing operation of the shut-off check door is not affected during thermal-state operation.

Description

Technical Field

[0001] The utility model relates to the technical field of air doors, in particular to a high-temperature resistant shut-off check valve. Background Art

[0002] Currently, a shutoff check valve consists of a pneumatic actuator, door shaft, bearing seat, bearing bracket, shaft tube, shaft tube packing assembly, door panel, door seat seal assembly, and door frame. The door panel is opened or closed primarily by the door shaft rotating left and right under the influence of the pneumatic actuator. To ensure tightness, a door seat seal is installed inside the door frame. A door shaft packing seat assembly is also designed to reduce shaft tube leakage. Bearing seats are installed on both ends of the shaft to ensure flexible rotation of the door shaft.

[0003] However, due to its simple structure, this type of shut-off check valve can only be used in hot air or flue gas ducts ≤400°C. If the flue gas temperature exceeds 400°C, or even reaches around 600°C, the door panel of this type of shut-off check valve will be greatly deformed due to the heat, causing the performance of the door seat seal assembly to deteriorate. It will also cause the shaft tube and door panel to deform under high temperature, causing the door shaft and bearing to jam. Therefore, this simple shut-off check valve cannot be opened or closed normally when the flue gas temperature is ≥400°C, and is not suitable for use in high-temperature flue gas ducts.

[0004] In order to solve the above problems, there is an urgent need to innovatively design a high-temperature resistant shut-off check valve ≥400°C. Utility Model Content

[0005] In response to the shortcomings of existing damper technology, the utility model provides a high-temperature resistant shut-off check valve to solve the problem mentioned in the above background technology that the current shut-off check valve cannot be used in high-temperature flue gas ducts, ensuring that normal opening or closing operations can be performed when the flue gas temperature is ≥400℃ during hot operation.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature resistant shut-off check door, comprising a door frame, wherein bearing brackets are fixedly installed at the upper and lower ends of the door frame, a sealing assembly is provided inside the door frame, a bearing seat is fixedly installed on the outer surface of the upper side of the bearing bracket, a door shaft is inserted into the bearing seat, a pneumatic actuator is provided at the input end of the door shaft, a shaft tube is fixedly installed at the lower end of the door shaft, a first filler assembly is fixedly installed inside the bearing bracket, a second filler assembly is fixedly installed on the upper side of the bearing bracket away from the first filler assembly, an air inlet chamber is provided on the upper side of the first filler assembly, fixing bolts are threadedly connected on the left and right sides of the air inlet chamber, an air inlet short pipe is fixedly installed on the right side of the air inlet chamber, a door panel is provided on the left side of the shaft tube, a cooling air pipe bundle is provided inside the door panel, a partition is fixedly installed inside the shaft tube, an air outlet chamber is provided at the lower end of the door frame, and an air outlet short pipe is fixedly installed on the left side of the air outlet chamber.

[0007] Preferably, the first filler assembly and the second filler assembly are provided in two groups and are respectively located at the upper and lower ends of the door frame. An air outlet chamber is fixedly installed between the first filler assembly and the second filler assembly at the lower end, and an air outlet short pipe is fixedly installed on the left side of the air outlet chamber.

[0008] Preferably, the cooling air duct bundle is communicated with the interior of the shaft tube, and ventilation holes are provided at both ends of the shaft tube, and the ventilation holes at both ends are respectively located directly above the air inlet chamber and the air outlet chamber.

[0009] Preferably, the shaft tube passes through the first filler component and the second filler component.

[0010] Preferably, the second filler assembly is fixedly connected to the air inlet chamber.

[0011] Preferably, the sealing assembly is provided with two upper and lower ends respectively located on the inner side of the door frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The high-temperature-resistant shutoff check valve has a shaft tube fixedly mounted at the lower end of the door shaft, with ventilation holes provided at both ends of the shaft tube. An air inlet chamber is provided on the upper side of the first filler assembly, with fixing bolts threadedly connected to the left and right sides of the air inlet chamber. An air inlet short pipe is fixedly mounted on the right side of the air inlet chamber, a door panel is provided on the left side of the shaft tube, a cooling air duct bundle is provided inside the door panel, a partition is fixedly mounted inside the shaft tube, an air outlet chamber is provided at the lower end of the door frame, and an air outlet short pipe is fixedly mounted on the left side of the air outlet chamber. The cooling air duct bundle communicates with the interior of the shaft tube, and external cooling air is used to cool the shaft tube and door panel components. External cooling air enters the interior of the air inlet chamber from the air inlet short pipe, enters the interior of the shaft tube through the ventilation holes around the upper shaft tube, then flows through the cooling air duct bundle of the upper door panel, and then flows out of the cooling air duct bundle of the lower door panel to the lower shaft tube, flows into the air outlet chamber through the ventilation holes around the lower shaft tube, and finally flows out of the air outlet short pipe. Such a structural design can effectively carry away part of the heat on the shaft tube and door panel with the flow of cooling air, thereby reducing the thermal deformation of the shaft tube and door panel, so that the shut-off check valve can be used in high-temperature flue gas ducts, ensuring that the normal opening or closing operation of the damper is not affected when the flue gas temperature is ≥400℃. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the top view of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the air duct structure of the utility model.

[0016] In the figure: 1. Door frame; 2. Bearing bracket; 3. Bearing seat; 4. Door shaft; 5. Shaft tube; 6. First filler assembly; 7. Door panel; 8. Sealing assembly; 9. Pneumatic actuator; 10. Second filler assembly; 11. Air inlet chamber; 12. Air inlet short pipe; 13. Fixing bolt; 14. Cooling air duct bundle; 15. Partition; 16. Air outlet chamber; 17. Air outlet short pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Please refer to Figures 1-2. When using the present invention, in order to solve the problem that the shut-off check valve of the current structure cannot be used in a high-temperature flue gas duct and cannot be opened or closed during hot operation, bearing brackets 2 are fixedly installed at both ends of the door frame 1, a sealing component 8 is provided on the inner side of the door frame 1, a bearing seat 3 is fixedly installed on the outer surface of the upper side of the bearing bracket 2, a door shaft 4 is inserted into the bearing seat 3, a pneumatic actuator 9 is provided at the input end of the door shaft 4, and a shaft is fixedly installed at the lower end of the door shaft 4. Tube 5, a first stuffing assembly 6 is fixedly installed inside the bearing bracket 2, a second stuffing assembly 10 is fixedly installed on the upper side of the bearing bracket 2 away from the first stuffing assembly 6, an air inlet chamber 11 is provided on the upper side of the first stuffing assembly 6, and fixing bolts 13 are threadedly connected on the left and right sides of the air inlet chamber 11, an air inlet short pipe 12 is fixedly installed on the right side of the air inlet chamber 11, a door panel 7 is provided on the left side of the shaft tube 5, a cooling air pipe bundle 14 is provided inside the door panel 7, and a partition 15 is fixedly installed inside the shaft tube 5.

[0019] Working principle: When using the high-temperature resistant shut-off check valve, external cooling air is used to cool the shaft tube 5 and the door panel 7 components. The external cooling air enters the air inlet chamber 11 from the air inlet short pipe 12, and then enters the shaft tube 5 from the ventilation holes around the shaft tube 5, and then flows from the inside of the shaft tube 5 into the cooling air duct bundle 14 of the upper door panel 7. Because the partition 15 design is adopted, the air duct circulation is restricted. The cooling air can only pass through the cooling air duct bundle 14 of the upper door panel 7 and then flow out of the cooling air duct bundle 14 of the lower door panel 7 to the air outlet chamber 16, and finally flow out from the air outlet short pipe 17, effectively carrying away part of the heat on the shaft tube 5 and the door panel 7 with the flow of cooling air, thereby reducing the thermal deformation of the shaft tube 5 and the door panel 7.

[0020] Compared with the relevant technology, the high-temperature resistant shut-off check valve provided by the utility model has the following beneficial effects: it enables the shut-off check valve to be used in high-temperature flue gas ducts, ensuring that the opening or closing effect of the shut-off check valve is not affected when the flue gas temperature is ≥400℃.

[0021] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant shut-off check door, comprising a door frame (1), characterized in that: The door frame (1) is fixedly mounted with bearing brackets (2) at both upper and lower ends, a sealing assembly (8) is provided on the inner side of the door frame (1), a bearing seat (3) is fixedly mounted on the outer surface of the upper side of the bearing bracket (2), a door shaft (4) is provided inside the bearing seat (3), a pneumatic actuator (9) is provided at the input end of the door shaft (4), a shaft tube (5) is fixedly mounted on the lower end of the door shaft (4), a first filler assembly (6) is fixedly mounted inside the bearing bracket (2), a second filler assembly (10) is fixedly mounted on the upper side of the bearing bracket (2) away from the first filler assembly (6), an air inlet chamber (11) is provided on the upper side of the first filler assembly (6), the air inlet chamber (11) is threadedly connected with fixing bolts (13) on both left and right sides, an air inlet short pipe (12) is fixedly mounted on the right side of the air inlet chamber (11), a door panel (7) is provided on the left side of the shaft tube (5), a cooling air pipe bundle (14) is provided inside the door panel (7), and a partition (15) is fixedly mounted inside the shaft tube (5).

2. The high temperature resistant shut-off check valve according to claim 1, characterized in that: Two groups of the first filler assembly (6) and the second filler assembly (10) are respectively located at the upper and lower ends of the door frame (1); an air outlet chamber (16) is fixedly installed between the first filler assembly (6) and the second filler assembly (10) at the lower end; and an air outlet short pipe (17) is fixedly installed on the left side of the air outlet chamber (16).

3. The high temperature resistant shut-off check valve according to claim 1, characterized in that: The cooling air pipe bundle (14) is in communication with the interior of the shaft tube (5). Ventilation holes are provided at both ends of the shaft tube (5), and the ventilation holes at both ends are respectively located directly above the air inlet chamber (11) and the air outlet chamber (16).

4. The high temperature resistant shut-off check valve according to claim 1, characterized in that: The shaft tube (5) passes through the interior of the first filler component (6) and the second filler component (10).

5. The high temperature resistant shut-off check valve according to claim 1, characterized in that: The second filler assembly (10) is fixedly connected to the air inlet chamber (11).

6. The high temperature resistant shut-off check valve according to claim 1, characterized in that: The sealing component (8) is provided with two upper and lower ends respectively located on the inner side of the door frame (1).

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