A rainproof damper device for high-temperature exhaust chimney

Abstract

The application discloses a rainproof damper device for a high-temperature exhaust chimney, which comprises a chimney extension section, a rotating mechanism and a damper blade, the chimney extension section is coaxially connected to the top of the exhaust chimney, the rotating mechanism and the damper blade are symmetrically arranged on the left and right sides of the chimney extension section, the rotating mechanism comprises an actuator, a speed reducer and a rotating rod, one end of the rotating rod is hingedly connected to the output end of the speed reducer, the other end of the rotating rod is hingedly connected to the outer side end of the damper blade, transmission connecting rods are symmetrically hingedly connected to the front and back sides of the chimney extension section, the other end of the transmission connecting rod is hingedly connected to the inner side end of the damper blade; the chimney extension section is further provided with an opening limit switch and a closing limit switch, which are used for sensing the opening and closing of the damper blade. The rainproof damper device for the high-temperature exhaust chimney can control the opening and closing of the rainproof damper according to the requirement, so that the top of the exhaust chimney is in a closed state when the exhaust chimney is not used, and the exhaust chimney is protected.

Description

Technical Field

[0001] This utility model relates to the technical field of chimney protection devices, and in particular to an openable and closable rainproof damper device for high-temperature emission chimneys. Background Technology

[0002] In the current market, many power plants using oil and gas as fuel primarily employ gas turbine power generation systems, such as single-cycle gas turbine power generation systems. Because the system's exhaust gases are maintained at extremely high temperatures of 450-650℃, they are directly discharged into the atmosphere through exhaust chimneys. These chimneys utilize a "three-layer composite structure" design: an outer layer of carbon steel, a middle insulation layer, and an inner layer of stainless steel lining. Since stainless steel linings are prone to thermal expansion and contraction under high temperatures, a monolithic structure would easily lead to cracks or damage due to deformation. Therefore, the internal stainless steel linings must be designed with a "fish-scale overlapping" pattern, meaning adjacent lining edges overlap, reserving space for thermal deformation to prevent lining failure due to temperature stress.

[0003] However, the fish-scale overlapping structure inevitably has tiny gaps, and rainwater will seep into the middle insulation layer through these gaps during rainy days. On the one hand, this can easily cause the outer carbon steel plate to rust due to long-term contact with moisture. On the other hand, it can cause the insulation cotton to absorb water and become damp, which increases the thermal conductivity and significantly reduces the insulation performance. Utility Model Content

[0004] This application provides an openable and closable rainproof damper device for high-temperature exhaust chimneys. It can control the opening or closing of the rainproof damper according to whether the exhaust chimney needs to exhaust, so that the top of the exhaust chimney is kept closed when not in use, thereby protecting the exhaust chimney.

[0005] This application provides an openable and closable rainproof damper device for a high-temperature emission chimney, including a chimney extension section, a rotating mechanism, and damper blades. The chimney extension section is coaxially connected to the top of the emission chimney. The rotating mechanism and the damper blades are symmetrically arranged on the left and right sides of the chimney extension section. The rotating mechanism includes an actuator, a reduction gearbox, and a rotating rod. One end of the rotating rod is hinged to the output end of the reduction gearbox, and the other end is hinged to the outer end of the damper blade. Transmission connecting rods are symmetrically hinged to the front and rear sides of the chimney extension section, and the other end of the transmission connecting rods is hinged to the inner end of the damper blade. The chimney extension section is also equipped with an open limit switch and a close limit switch. After the actuator receives the open signal, it drives the corresponding damper blades to rotate in a specific direction through the gearboxes on both sides and the rotating rod until they touch the open limit switch, thus opening the top opening of the chimney extension section. After the actuator receives the close signal, it drives the corresponding damper blades to rotate in a specific direction through the gearboxes on both sides and the rotating rod until they touch the close limit switch, thus closing the top opening of the chimney extension section.

[0006] In one possible implementation, two or three limit switches are arranged side by side in the horizontal direction.

[0007] In one possible implementation, a workbench is provided at the top of the exhaust chimney, and an actuator mounting base is provided on the top of the workbench for mounting the actuator. The gearbox is located at the lower part of the chimney extension section, and the actuator is connected to the gearbox via an extension rod.

[0008] In one possible implementation, the damper blades are elliptical in shape and, when the chimney extension is closed, the damper blades are in an upwardly arched posture.

[0009] In one possible implementation, the damper blade on either side has a sealing plate at the top edge of its inner end, the curvature of which is consistent with that of the damper blade, for sealing the gap between the damper blades on both sides after the chimney extension is closed.

[0010] In one possible implementation, the chimney extension is a split structure connected by bolts.

[0011] In one possible implementation, the actuator is an electric actuator, a pneumatic actuator, or a winch.

[0012] Beneficial effects: Compared with the prior art, the openable and closable rainproof damper device for high-temperature exhaust chimneys provided in this application can adaptively adjust the opening or closing of the damper blades according to the exhaust needs through the cooperation of the rotating mechanism and the damper blades, so that the top of the exhaust chimney is sealed when not in use, thereby preventing rainwater leakage and protecting the exhaust chimney. By mounting the actuator on the workbench away from the top opening of the chimney extension, personnel safety can be ensured during maintenance operations. The damper blades adopt an elliptical structure, which allows rainwater to flow downwards along the arc, reduces wind resistance, increases strength, and reduces the height and weight of the equipment. By installing a sealing plate on either side of the damper blades, it is possible to cover any gaps that may exist between the two damper blades when closed, further ensuring the reliability of the seal and preventing rainwater leakage.

[0013] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0014] Figure 1 The diagram shows a front view of the openable and closable rainproof damper device for high-temperature exhaust chimneys according to this application.

[0015] Figure 2 A side view of the openable and closable rainproof damper device for high-temperature emission chimneys is shown in this application.

[0016] Figure 3 A top view of the openable and closable rainproof damper device for high-temperature emission chimneys is shown in this application.

[0017] Figure 4 A partial structural schematic diagram of the openable and closable rainproof damper device for high-temperature emission chimneys is shown. Detailed Implementation

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0019] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0020] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0021] refer to Figures 1 to 4This application provides an openable and closable rainproof damper device for a high-temperature emission chimney, including a chimney extension section 10, a rotating mechanism, and damper blades 30. The chimney extension section 10 is coaxially connected to the top of an emission chimney 40. The rotating mechanism and the damper blades 30 are symmetrically arranged on the left and right sides of the chimney extension section 10. The rotating mechanism includes an actuator 21, a reduction gearbox 22, and a rotating rod 23, wherein one end of the rotating rod 23 is hinged to the output end of the reduction gearbox 22, and the other end of the rotating rod 23 is hinged to the outer end of the damper blades 30. Transmission connecting rods 11 are symmetrically hinged to the front and rear sides of the chimney extension section 10, and the other end of the transmission connecting rods 11 is hinged to the inner end of the damper blades 30.

[0022] The chimney extension section 10 is also equipped with an open limit switch 12 and a close limit switch 13. After the actuator 21 receives the signal to open the door, the corresponding damper blades 30 are rotated in a directional manner by the gearboxes 22 on both sides in conjunction with the rotating rod 23 until they touch the open limit switch 12, thus opening the top opening of the chimney extension section 10. After the actuator 21 receives the signal to close the door, the corresponding damper blades 30 are rotated in a directional manner by the gearboxes 22 on both sides in conjunction with the rotating rod 23 until they touch the close limit switch 13, thus closing the top opening of the chimney extension section 10.

[0023] Specifically, the PLC control system receives a signal (or a manual triggering command to open the door) and sends a signal to the actuator 21. After the actuator 21 starts, it transmits power to the reduction gearbox 22. The reduction gearbox 22 reduces the speed and amplifies the torque, driving the rotating rod 23 to rotate. At the same time, the transmission link 11 adaptively swings (to avoid jamming of the damper blades and ensure smooth rotation). The damper blade 30 rotates in a directional manner around the two pivot points (the hinge point between the rotating rod 23 and the damper blade 30, and the hinge point between the transmission link 11 and the damper blade 30). When the damper blade 30 performs the opening action, the damper blade 30 rotates and touches the opening limit switch 12. The opening limit switch 12 sends a "position signal" to the PLC control system, the actuator 21 is de-energized and stops, all mechanisms stop synchronously, and the top of the chimney is in an open state, meeting the requirements for high-temperature flue gas emission. When the damper blade 30 closes, it rotates and touches the limit switch 13. The limit switch 13 sends a "position signal" to the PLC control system, and the actuator is de-energized and stops. At this time, the damper blades 30 on both sides cooperate to block the top opening of the chimney extension section 10, and the top of the chimney is in a closed state, blocking the path of rainwater infiltration.

[0024] In one embodiment, two or three limit switches 12 are arranged side by side in the horizontal direction, so as to ensure that the equipment can still be controlled normally to discharge flue gas even if a single limit switch 12 fails.

[0025] In one embodiment, a workbench 24 is provided on the upper part of the exhaust chimney 40, and an actuator mounting base 25 is provided on the top of the workbench 24 for mounting the actuator 21. The gearbox 22 is located at the lower part of the chimney extension section 10, and the actuator 21 is connected to the gearbox 22 through an extension rod 26. In this way, the structural design of the workbench 24 and the extension rod 26 allows the actuator 21 to be located away from the exhaust outlet at the top, making it safer for workers to perform maintenance operations and avoiding high temperature injuries.

[0026] In one embodiment, the damper blade 30 is elliptical in shape, and when the chimney extension 10 is closed, the damper blade 30 is arched upwards. This structural design allows rainwater to flow downwards along the arc, reduces wind resistance, increases strength, and reduces the height and weight of the equipment, making it more convenient to use.

[0027] In one embodiment, the damper blade 30 on either side has a sealing plate 31 at its top edge on the inner end. The curvature of the sealing plate 31 matches that of the damper blade 30. This sealing plate seals the gap between the damper blades 30 on both sides after the chimney extension section 10 is closed, preventing rainwater from flowing in and further ensuring the reliability of the seal. In this case, when closing the door, the damper blade 30 without the sealing plate 31 is closed first; simultaneously, when opening the door, the damper blade 30 with the sealing plate 31 is opened first, ensuring that the sealing plate 31 does not interfere with the opening and closing mechanism.

[0028] In one embodiment, the chimney extension section 10 is a split structure connected by bolts, which not only facilitates transportation but also reduces costs. After being assembled on the ground, it can be hoisted to the top of the exhaust chimney for installation.

[0029] In one embodiment, the actuator 21 is an electric actuator, a pneumatic actuator, or a winch.

[0030] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A closable rainproof damper device for high-temperature emission chimneys, characterized in that, The device includes a chimney extension section, a rotating mechanism, and damper blades. The chimney extension section is coaxially connected to the top of the exhaust chimney. The rotating mechanism and the damper blades are symmetrically arranged on the left and right sides of the chimney extension section. The rotating mechanism includes an actuator, a gearbox, and a rotating rod. One end of the rotating rod is hinged to the output end of the gearbox, and the other end is hinged to the outer end of the damper blade. Transmission connecting rods are symmetrically hinged to the front and rear sides of the chimney extension section, and the other end of the transmission connecting rods is hinged to the inner end of the damper blade. The chimney extension section is also equipped with an open limit switch and a close limit switch. After the actuator receives the open signal, it drives the corresponding damper blades to rotate in a specific direction through the gearboxes on both sides and the rotating rod until they touch the open limit switch, thus opening the top opening of the chimney extension section. After the actuator receives the close signal, it drives the corresponding damper blades to rotate in a specific direction through the gearboxes on both sides and the rotating rod until they touch the close limit switch, thus closing the top opening of the chimney extension section.

2. The openable and closable rainproof damper device for high-temperature emission chimneys as described in claim 1, characterized in that, The limit switches are arranged in two or three parallel rows in the horizontal direction.

3. The openable and closable rainproof damper device for high-temperature emission chimneys as described in claim 1, characterized in that, The upper part of the exhaust chimney is provided with a workbench, and the top of the workbench is provided with an actuator mounting base for installing the actuator. The gearbox is located at the lower part of the chimney extension section, and the actuator is connected to the gearbox through an extension rod.

4. The openable and closable rainproof damper device for high-temperature emission chimneys as described in claim 1, characterized in that, The damper blades are elliptical in shape, and when the chimney extension is closed, the damper blades are arched upwards.

5. The openable and closable rainproof damper device for high-temperature emission chimneys as described in claim 4, characterized in that, Each damper blade on one side has a sealing plate at the top edge of its inner end. The curvature of the sealing plate is consistent with that of the damper blade, and it is used to seal the gap between the damper blades on both sides after the chimney extension is closed.

6. The openable and closable rainproof damper device for high-temperature emission chimneys as described in claim 1, characterized in that, The chimney extension section is a split structure connected by bolts.

7. The openable and closable rainproof damper device for high-temperature emission chimneys as described in claim 1, characterized in that, The actuator is an electric actuator, a pneumatic actuator, or a winch.

Images