Steam jacketed damper

Abstract

The utility model discloses a steam jacketed air door, including the casing, be provided with the vane group in the casing, the vane group is connected with drive arrangement through transmission device, be provided with sealed air butterfly valve on the casing, sealed air butterfly valve is connected with transmission device, the outside of casing is provided with steam jacketed device, the utility model discloses a steam jacketed device passes through the import steam, has improved the overall temperature of air door, avoided the problem of jam because of low temperature.

Description

Technical Field

[0001] This utility model relates to the field of wet flue gas desulfurization and denitrification technology, specifically to a steam jacket damper. Background Technology

[0002] In the field of wet flue gas desulfurization and denitrification technology, when core equipment such as desulfurization towers, heat exchangers, and dust collectors need to be shut down for maintenance, dampers can be completely closed to form a physical sealing barrier, blocking the flow of flue gas upstream and downstream. This prevents untreated high-temperature flue gas containing sulfur and nitrogen from entering the maintenance area, while also preventing air leakage from causing oxidation and deterioration of the slurry inside the tower, ensuring the safety of maintenance personnel and the stability of the internal environment of the equipment. However, these dampers are usually located outdoors. In northern winters and high-altitude areas, winter temperatures often drop to -20°C or even -30°C, making mechanical structures prone to problems: moisture in the air can condense and freeze at damper shafts, tracks, and sealing gaps, directly jamming moving parts; metal parts may experience jamming due to thermal expansion and contraction leading to smaller clearances; and conventional lubricants may increase in viscosity or even solidify at low temperatures, significantly increasing the frictional resistance of components. Damper jamming problems occur frequently in this environment, leading to a chain of hidden dangers. Utility Model Content

[0003] To solve the above problems, this utility model provides a steam-jacketed damper. The steam-jacketed device increases the overall temperature of the damper by introducing steam, thus avoiding jamming caused by low temperature.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a steam jacket damper includes a housing, a blade assembly is provided inside the housing, the blade assembly is connected to a drive device through a transmission device; a sealing butterfly valve is provided on the housing, the sealing butterfly valve is connected to the transmission device; and a steam jacket device is provided on the outer side of the housing.

[0005] As a preferred technical solution of this utility model: the steam jacket device includes a heating sleeve disposed on the outside of the shell, and the heating sleeve is provided with a steam inlet, a steam outlet and a drain outlet.

[0006] As a preferred technical solution of this utility model: the driving device includes an electric actuator, which is mounted on the housing via an actuator mount.

[0007] As a preferred technical solution of this utility model: the blade group includes a first blade and a second blade, the first blade being connected to the output end of the electric actuator; the transmission device includes a first crank disposed at the output end of the electric actuator, the first crank being connected to a second crank disposed on the second blade via a first connecting rod, the second crank being connected to a third crank via a second connecting rod; the third crank being connected to the sealing butterfly valve via a third connecting rod.

[0008] As a preferred technical solution of this utility model: the first blade and the second blade are provided with sealing channels.

[0009] As a preferred technical solution of this utility model: the housing is provided with a reverse flange.

[0010] This utility model has the following beneficial effects: 1. The steam jacket device increases the overall temperature of the damper by introducing steam, thus avoiding jamming caused by low temperature.

[0011] 2. The blade assembly and casing are preferably made of Q235+1.4529 composite plate, which improves corrosion resistance. Attached Figure Description

[0012] Figure 1 This is a top view of the overall structure of this utility model; Figure 2 This is a left view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the reverse flange connection of this utility model; Figures 1-3 In the middle, 1. Blade assembly; 2. Transmission device; 3. Drive device; 4. Sealing butterfly valve; 5. Electric actuator; 6. Actuator mount; 7. First blade; 8. Second blade; 9. First crank; 10. First connecting rod; 11. Second crank; 12. Second connecting rod; 13. Third crank; 14. Third connecting rod; 15. Heating jacket; 16. Jumper pipe; 17. Steam inlet; 18. Steam outlet; 19. Drain outlet; 20. Anti-flange; 21. Shell; 22. Steam jacket device. Detailed Implementation

[0013] To make the objectives and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0014] like Figures 1-3As shown, this embodiment of the utility model provides a steam-jacketed damper, including a housing 21, a blade assembly 1 disposed inside the housing 21, and the blade assembly 1 connected to a drive device 3 via a transmission device 2; a sealing butterfly valve 4 disposed on the housing 21, and the sealing butterfly valve 4 connected to the transmission device 2; and a steam jacket device 22 disposed on the outer side of the housing 21. The steam jacket device 22, by introducing steam, increases the overall temperature of the damper, preventing jamming due to low temperatures. The blade assembly 1 and the housing 21 are preferably made of Q235+1.4529 composite plate, which improves corrosion resistance.

[0015] The drive unit 3 includes an electric actuator 5, which is mounted on the housing 21 via an actuator mount 6. The electric actuator 5 is preferably a 6000 N·m on / off type electric actuator, capable of controlling the blade opening degree according to system operating requirements and reflecting the blade opening state in real time. This enables remote operation or program control, facilitating DCS control automation. The blade assembly 1 includes a first blade 7 and a second blade 8. The first blade 7 is connected to the output end of the electric actuator 5. The transmission unit 2 includes a first crank 9 located at the output end of the electric actuator 5. The first crank 9 is connected to a second crank 11 located on the second blade 8 via a first connecting rod 10. The second crank 11 is connected to a third crank 13 via a second connecting rod 12. The third crank 13 is connected to a sealing butterfly valve 4 via a third connecting rod 14. When the electric actuator 5 operates, it drives the first blade 7 to rotate, simultaneously driving the second crank 11 and the third connecting rod 14, thus rotating the second blade 8 and opening / closing the sealing butterfly valve 4. Sealing channels are provided on the first blade 7 and the second blade 8. When the first blade 7 and the second blade 8 are closed, the sealing butterfly valve 4 is also opened, and sealing air enters the sealing channel through the sealing butterfly valve 4, improving the sealing effect of the first blade 7 and the second blade 8. The transmission device 2 enables interlocking control between the sealing butterfly valve 4 and the first blade 7 and the second blade 8. A reverse flange 20 is provided on the housing 21. The reverse flange 20 facilitates on-site installation. The sealing channel is preferably made of 2057 material to improve corrosion resistance; the sealing butterfly valve 4 is made of 2205 material, and the reverse flange 20 is preferably made of Q235 material to reduce costs.

[0016] The steam jacket device 22 includes a heating jacket 15 disposed on the outside of the housing 21. The heating jacket 15, along with other external devices such as the sealing butterfly valve 4 and the transmission device 2, is connected to the housing 1 via a cross-connector 16 to form a single integrated structure. The heating jacket 15 is provided with a steam inlet 17, a steam outlet 18, and a drain outlet 19. The drain outlet 19 is used to drain condensate from the heating jacket 15. Steam enters through the steam inlet 17 and exits through the steam outlet 18, thus heating the housing 21 and increasing the overall temperature of the damper, preventing jamming due to low temperatures.

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A steam jacket damper, comprising a housing (21), characterized in that: The housing (21) is provided with a blade assembly (1), which is connected to the drive device (3) via a transmission device (2); a sealing butterfly valve (4) is provided on the housing (21), which is connected to the transmission device (2); a steam jacket device (22) is provided on the outer side of the housing (21).

2. A steam jacketed damper according to claim 1, characterized in that: The steam jacket device (22) includes a heating jacket (15) disposed outside the housing (21), and the heating jacket (15) is provided with a steam inlet (17), a steam outlet (18) and a drain outlet (19).

3. A steam jacketed damper according to claim 2, characterized in that: The drive unit (3) includes an electric actuator (5), which is mounted on the housing (21) via an actuator mount (6).

4. A steam jacketed damper according to claim 3, characterized in that: The blade assembly (1) includes a first blade (7) and a second blade (8). The first blade (7) is connected to the output end of the electric actuator (5). The transmission device (2) includes a first crank (9) disposed at the output end of the electric actuator (5). The first crank (9) is connected to a second crank (11) disposed on the second blade (8) via a first connecting rod (10). The second crank (11) is connected to a third crank (13) via a second connecting rod (12). The third crank (13) is connected to the sealing butterfly valve (4) via a third connecting rod (14).

5. A steam jacketed damper according to claim 4, characterized in that: Sealing channels are provided on the first blade (7) and the second blade (8).

6. A steam jacket damper according to any one of claims 1-5, characterized in that: A reverse flange (20) is provided on the housing (21).

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