Flue damper

Abstract

This application discloses a flue gas slide gate valve, including a support frame and a valve plate housing slidably connected to the support frame. The valve plate housing has a hollow inner cavity. The flue gas slide gate valve includes an inlet pipe and an outlet pipe partially located within the inner cavity. The inlet pipe has an inlet hole communicating with the inner cavity, and the outlet pipe has an outlet hole communicating with the inner cavity. The inlet hole is located at the bottom end of the inlet pipe. The flue gas slide gate valve also includes a partition plate disposed within the inner cavity. The two ends of the partition plate are respectively fixed to the two side walls of the inner cavity, and the partition plate has an overflow hole that connects the two sides of the partition plate. This application solution, by setting the inlet pipe and outlet pipe in the hollow valve plate housing, avoids the slide gate valve from being affected by high-temperature flue gas, thus preventing deformation, jamming, leakage, and sealing failure, extending the service life of the slide gate valve, and improving the stability of the slide gate valve in use.

Description

Technical Field

[0001] This application belongs to the field of slide gate valves, and specifically relates to a flue slide gate valve. Background Technology

[0002] Under the working conditions of valves, the materials of ordinary flue damper valves will experience significant thermal expansion due to the influence of high-temperature flue gas, resulting in deformation, jamming, leakage, sealing failure, and reduced service life. In severe cases, this can lead to production accidents.

[0003] Chinese utility model patent CN203348580U discloses a high-temperature resistant water-cooled gate valve. The high-temperature resistant water-cooled gate valve is installed in a high-temperature flue. The gate valve is equipped with a water-cooling system, and the end of the gate is wrapped with a heat insulation layer. When the gate valve is in the closed state, the water-cooling system is turned on to cool the gate valve. When the gate valve is in the open state, the part of the gate with the heat insulation layer wrapped in it is exposed to the high-temperature flue and blocks the heat transfer of the flue gas.

[0004] However, the above-mentioned high-temperature water-cooled gate valve still has the following disadvantages: First, it has both a cooling device and a heat insulation layer installed, making its structure complex; second, although it has a cooling device and a heat insulation layer installed, they function separately and have limited effects. In particular, the cooling device is externally cooled, so the cooling effect is not very good, which still occasionally leads to accidents, and it still requires a higher grade of valve body material.

[0005] Therefore, a simpler and more effective way is needed to cool the gate valve and reduce the valve body temperature. Utility Model Content

[0006] This application provides a flue gate valve that solves the problem of poor external cooling effect of the gate valve.

[0007] The technical solution adopted in this application is as follows:

[0008] A flue gas valve includes a support frame and a valve plate housing slidably connected to the support frame. The valve plate housing has a hollow inner cavity. The flue gas valve includes an inlet pipe and an outlet pipe partially located in the inner cavity. The inlet pipe has an inlet hole communicating with the inner cavity, and the outlet pipe has an outlet hole communicating with the inner cavity. The inlet hole is located at the bottom end of the inlet pipe. The flue gas valve also includes a partition plate disposed in the inner cavity. The two ends of the partition plate are respectively fixed to the two side walls of the inner cavity, and the partition plate has an overflow hole that connects the spaces on both sides of the partition plate.

[0009] The flue gas valve includes a drive mechanism connected to the valve plate housing. The drive mechanism drives the valve plate to slide along the support frame. The connection point between the drive mechanism and the valve plate housing is located on the axis of the valve plate housing. The inlet pipe and the outlet pipe are respectively located on both sides of the drive mechanism.

[0010] The flue gas valve includes a valve port area and a placement area enclosed by the support frame, and the valve plate housing includes a first position located in the valve port area and a second position located in the placement area.

[0011] The support frame is provided with a slide rail, and the outer side wall of the valve plate housing is provided with a groove that cooperates with the slide rail. The valve plate housing moves along the slide rail to switch between the first position and the second position.

[0012] The valve plate housing has an end hole at its end for the water inlet pipe and the water outlet pipe to pass through. Both the water inlet pipe and the water outlet pipe include a flexible section and a cooling section. The cooling section is at least partially located in the inner cavity. When the valve plate housing is in the second position, the flexible section is located in the valve port area.

[0013] The water outlet is located at the top of the water outlet pipe within the inner cavity, and both the water outlet and the water inlet are provided in multiple circumferential directions.

[0014] The bottom of the inlet pipe and the outlet pipe are fixed to the bottom wall of the valve plate box. A water tank is provided outside the flue gas valve, and the other end of the inlet pipe and the outlet pipe is connected to the water tank.

[0015] The water tank is located at the top of the support frame, and the water tank includes an outlet connected to the inlet pipe and a return outlet connected to the outlet pipe, with the return outlet being higher than the outlet.

[0016] The partition is provided in multiple ways, each partition is provided with multiple overflow holes, and each partition is provided with a through hole through which the water inlet pipe and the water outlet pipe pass.

[0017] The driving mechanism includes a hydraulic rod, which is connected to the valve plate housing. The hydraulic rod includes a connecting section located in the inner cavity, which is fixedly connected to the bottom wall of the inner cavity. The hydraulic rod also includes a protective sleeve at least outside the connecting section.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0019] This application solution utilizes an inlet and outlet pipe within a hollow valve plate housing to achieve internal circulation cooling. The inlet hole at the bottom of the inlet pipe connects to the inner cavity of the valve plate housing, allowing low-temperature cooling water to enter and circulate within the housing, thus water-cooling it. The outlet hole of the outlet pipe is not located at the bottom; after heat exchange with the valve plate housing, the temperature rises, creating convection with the low-temperature water overflowing from the inlet hole and flowing upwards through the outlet hole into the outlet pipe. This achieves internal circulation cooling of the valve plate housing, preventing deformation, jamming, leakage, and sealing failure caused by high-temperature flue gas, extending the valve's service life, and improving its operational stability.

[0020] Meanwhile, this design also includes a partition plate fixedly connected to the inner cavity. The two ends of the partition plate are fixed to the side walls of the inner cavity, which helps to improve the structural strength of the valve plate housing and further prevents heat deformation. The partition plate is equipped with overflow holes, allowing unobstructed internal water circulation. This enables the water to flow through the valve plate and circulate throughout the inner cavity, achieving overall cooling of the valve plate housing and resulting in better cooling performance. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the slide gate valve in one embodiment of the present invention;

[0023] Figure 2 This is a side view of the slide valve in one embodiment of the present invention;

[0024] Figure 3 This is a top view of the valve plate housing in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the partition structure in one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the slide gate valve of this utility model in lateral use;

[0027] Figure 6 This is a schematic diagram of the slide valve being used laterally in another embodiment of the present invention.

[0028] List of components and reference numerals:

[0029] 1. Support frame; 11. Valve port area; 12. Placement area; 13. Slide rail;

[0030] 2. Valve plate housing, 21. Inner cavity, 22. Groove;

[0031] 3. Water inlet pipe, 31. Water inlet hole, 32. Flexible section, 33. Cooling section;

[0032] 4 water outlet pipes, 41 water outlet holes;

[0033] 5 partitions, 51 overflow hole, 52 through hole;

[0034] 6 Drive mechanism, 61 Hydraulic station, 62 Hydraulic rod, 621 Connecting section, 622 Protective sleeve, 63 Hydraulic cylinder;

[0035] 7. Water tank, 71. Water outlet, 72. Water return outlet. Detailed Implementation

[0036] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0038] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0041] This application provides a flue gas valve, including a support frame 1 and a valve plate housing 2 slidably connected to the support frame 1. The valve plate housing 2 has a hollow inner cavity 21. The flue gas valve includes an inlet pipe 3 and an outlet pipe 4 partially located in the inner cavity 21. The inlet pipe 3 has an inlet hole 31 communicating with the inner cavity 21, and the outlet pipe 4 has an outlet hole 41 communicating with the inner cavity 21. The inlet hole 31 is located at the bottom end of the inlet pipe 3. The flue gas valve also includes a partition 5 disposed in the inner cavity 21. The two ends of the partition 5 are respectively fixed to the two side walls of the inner cavity 21, and the partition 5 has an overflow hole 51 that connects the two sides of the partition 5.

[0042] This application solution achieves internal circulation cooling of the valve plate housing 2 by setting an inlet pipe 3 and an outlet pipe 4 in the hollow valve plate housing 2. The inlet hole 31 at the bottom of the inlet pipe 3 is connected to the inner cavity 21 of the valve plate housing 2. Low-temperature cooling water enters the inner cavity 21 of the valve plate housing 2 from the inlet hole 31 and flows in the inner cavity 21 to cool the valve plate housing 2. The outlet hole 41 of the outlet pipe 4 is not located at the bottom. After the cold water exchanges heat with the valve plate housing 2, its temperature rises and forms convection with the low-temperature water overflowing from the inlet hole 31, flowing upward and entering the outlet pipe 4 through the outlet hole 41. This achieves internal circulation cooling of the valve plate housing 2, avoiding deformation, jamming, leakage and sealing failure of the slide gate valve due to the influence of high-temperature flue gas, extending the service life of the slide gate valve and improving the stability of the slide gate valve in use.

[0043] Meanwhile, this design also includes a partition 5 fixedly connected to the inner cavity 21. The two ends of the partition 5 are fixed to the side walls of the inner cavity 21, which helps to improve the structural strength of the valve plate housing 2 and further prevents the valve plate housing 2 from deforming due to heat. The partition 5 is equipped with an overflow hole 51, allowing unobstructed internal water circulation. This water can pass through the valve plate and circulate throughout the inner cavity 21, achieving overall cooling of the valve plate housing 2 and resulting in better cooling performance.

[0044] In one embodiment, the flue gas valve includes a drive mechanism 6 connected to the valve plate housing 2. The drive mechanism 6 drives the valve plate to slide along the support frame 1. The connection point between the drive mechanism 6 and the valve plate housing 2 is located on the axis of the valve plate housing 2, and the inlet pipe 3 and the outlet pipe 4 are respectively located on both sides of the drive mechanism 6.

[0045] This design uses a drive mechanism 6 to move the valve plate housing 2, thereby enabling the opening and closing of the slide valve port. The connection between the drive mechanism 6 and the valve plate housing 2 is positioned on the axis of the valve plate housing 2. Since the valve plate housing 2 is typically a regular shape, this arrangement facilitates smooth movement of the valve plate housing 2 by the drive mechanism 6, preventing any deviation during movement. The inlet pipe 3 and outlet pipe 4 are positioned on either side of the drive mechanism 6. It should be noted that "both sides" refers to the two sides of the connection between the drive mechanism 6 and the valve plate housing 2, which contributes to the overall structural stability and allows for a rational layout of the inlet and outlet pipes.

[0046] Furthermore, the flue gas valve includes a valve port area 11 and a placement area 12 enclosed by a support frame 1, and the valve plate housing 2 includes a first position located in the valve port area 11 and a second position located in the placement area 12.

[0047] Preferably, the support frame 1 is provided with a slide rail 13, and the outer side wall of the valve plate housing 2 is provided with a groove 22 that cooperates with the slide rail 13. The valve plate housing 2 moves along the slide rail 13 to switch between a first position and a second position.

[0048] This scheme sets up a valve port area 11, which is the area connected to the flue, and a placement area 12, which is the placement position of the valve plate box 2 when the slide valve is in the connected state. The drive mechanism 6 drives the valve plate box 2 to move along the support frame 1, and the valve plate box 2 is switched between the first position and the second position by sliding, so as to realize the opening and closing of the slide valve.

[0049] In one embodiment, the valve plate housing 2 has an end hole at its end through which the inlet pipe 3 and the outlet pipe 4 pass. The inlet pipe 3 and the outlet pipe 4 each include a flexible section 32 and a cooling section 33. The cooling section 33 is at least partially located in the inner cavity 21. When the valve plate housing 2 is in the second position, the flexible section 32 is located in the valve port area 11.

[0050] In this embodiment, the water inlet 31 is located in the cooling section 33 of the water inlet pipe 3 and at the bottom of the inner cavity 21 of the valve plate housing 2, so that cold water enters the inner cavity 21 from the bottom to start heat exchange. After the temperature rises, it overflows upward to the water outlet 41 and enters the water outlet pipe 4 from the water outlet 41. The flexible section 32 can be set as a telescopic pipe. When the valve plate housing 2 moves from the second position to the first position, the cooling section 33 moves with the movement of the valve plate housing 2, squeezing the flexible section 32 to make it contract. This will not affect the normal movement of the valve plate housing 2, and the flexible section 32 located in the valve port area 11 will not be damaged due to the movement and squeezing of the valve plate housing 2.

[0051] Furthermore, the cooling section 33 can be entirely located within the inner cavity 21, or partially located within the inner cavity 21, with a portion extending out of the inner cavity 21 and connecting to the flexible section 32. When the cooling section 33 is partially located outside the inner cavity 21, it facilitates connection with the flexible section 32, and the external connection provides better support and improves connection stability. It is understood that since both the outlet pipe 4 and the inlet pipe 3 include portions located outside the valve plate housing 2, the valve plate housing 2 has end holes through which the inlet pipe 3 and outlet pipe 4 pass. A sealing ring or other sealing element is installed at the end hole to seal it and prevent liquid leakage.

[0052] Preferably, the water outlet 41 is located at the top of the water outlet pipe 4 in the inner cavity 21, and both the water outlet 41 and the water inlet 31 are provided in multiple circumferential directions.

[0053] The water inlet 31 is located at the bottom, and the water outlet 41 is located at the top. Cold water flows from the bottom, filling the inner cavity 21. After heat exchange, the heated water enters the water outlet 41 from the top and is collected back through the water outlet pipe 4. After cooling, it is reused, realizing a cycle of cooling. Multiple water inlets 31 and water outlets 41 are provided circumferentially.

[0054] In one embodiment, the bottom of the inlet pipe 3 and the outlet pipe 4 are fixed to the bottom wall of the valve plate box 2, and a water tank 7 is provided outside the flue gas valve. The other end of the inlet pipe 3 and the outlet pipe 4 are connected to the water tank 7.

[0055] Furthermore, the water tank 7 is located on top of the support frame 1, and the water tank 7 includes an outlet 71 connected to the inlet pipe 3 and a return outlet 72 connected to the outlet pipe 4, with the height of the return outlet 72 being higher than that of the outlet 71.

[0056] In this design, the inlet pipe 3 and outlet pipe 4 are fixed to the bottom wall of the valve plate housing 2, specifically, to the inner wall of the inner cavity 21. Since the inlet pipe 3 and outlet pipe 4 include portions exposed outside the inner cavity 21, the top wall of the valve plate housing 2 also limits their movement, ensuring their stable position within the valve plate housing 2. Both the inlet pipe 3 and outlet pipe 4 are connected to the water tank 7. The inlet pipe 3 connects to the outlet 71 at the bottom of the water tank 7, and the outlet pipe 4 connects to the upper recovery port. A pressure relief port can be provided to discharge the high-temperature steam. The remaining liquid in the water tank 7 is condensed, and the condensed low-temperature water enters the inlet pipe 3 from the outlet 71, replenishing the valve plate housing 2 and continuing the cooling process of the slide gate valve.

[0057] In one embodiment, there are multiple partitions 5, each partition 5 has multiple overflow holes 51, and each partition 5 has a through hole 52 through which the water inlet pipe 3 and the water outlet pipe 4 pass.

[0058] Multiple baffles 5 are installed to enhance the structural strength of the valve plate housing 2. The baffles 5 are evenly arranged along the axial direction of the valve plate housing 2, which is beneficial to the overall structural stability of the valve plate housing 2. Multiple overflow holes 51 are provided in the baffles 5 to facilitate faster water flow, rapid cooling, and accelerated circulation.

[0059] In one embodiment, the drive mechanism 6 includes a hydraulic rod 62, which includes a connecting section 621 located in the inner cavity 21. The connecting section 621 is fixedly connected to the bottom wall of the inner cavity 21, and the hydraulic rod 62 also includes a protective sleeve 622 disposed at least outside the connecting section 621.

[0060] Understandably, the drive mechanism 6 also includes a hydraulic station 61 and a hydraulic cylinder 63. The hydraulic station 61 supplies hydraulic oil to the hydraulic cylinder 63, which in turn drives the hydraulic rod 62 to move, thereby moving the valve plate housing 2. Extending the hydraulic rod 62 into the inner cavity 21 and connecting it to the bottom wall facilitates more stable movement of the valve plate housing 2 during hydraulic drive. Furthermore, since the valve plate housing 2 requires an opening for the hydraulic rod 62 to extend into, the bottom wall's fixation limits the movement of the hydraulic rod 62, preventing swaying during extension and retraction, thus promoting rapid and stable movement of the valve plate housing 2. Simultaneously, a protective sleeve is installed on the outside of the connecting section 621 to prevent it from being corroded by liquid during prolonged exposure to the inner cavity 21, ensuring the long-term stable operation of the drive mechanism 6.

[0061] Understandably, the slide gate valve can be placed vertically or horizontally during use. When the slide gate valve is placed horizontally, the inlet pipe 3 is at the bottom and the outlet pipe 4 is at the top. The placement of the water tank 7 is also adjusted accordingly, so that the outlet 71 is at the bottom of the water tank 7 and the recovery port is at the top. Furthermore, the water tank 7 is always positioned higher than the slide gate valve; that is, the water tank 7 is at a height above the slide gate valve.

[0062] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0063] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0064] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A flue plug valve characterized by, The device includes a support frame and a valve plate housing slidably connected to the support frame. The valve plate housing has a hollow inner cavity. The flue valve includes an inlet pipe and an outlet pipe partially located in the inner cavity. The inlet pipe has an inlet hole communicating with the inner cavity, and the outlet pipe has an outlet hole communicating with the inner cavity. The inlet hole is located at the bottom end of the inlet pipe. The flue valve also includes a partition plate disposed in the inner cavity. The two ends of the partition plate are respectively fixed to the two side walls of the inner cavity, and the partition plate has an overflow hole that connects the spaces on both sides of the partition plate.

2. The flue damper according to claim 1, wherein, The flue gas valve includes a drive mechanism connected to the valve plate housing. The drive mechanism drives the valve plate to slide along the support frame. The connection point between the drive mechanism and the valve plate housing is located on the axis of the valve plate housing. The inlet pipe and the outlet pipe are respectively located on both sides of the drive mechanism.

3. The flue damper according to claim 2, wherein, The flue gas valve includes a valve port area and a placement area enclosed by the support frame, and the valve plate housing includes a first position located in the valve port area and a second position located in the placement area.

4. The flue gas valve according to claim 3, characterized in that, The support frame is provided with a slide rail, and the outer side wall of the valve plate housing is provided with a groove that cooperates with the slide rail. The valve plate housing moves along the slide rail to switch between the first position and the second position.

5. The flue damper according to claim 3, wherein, The valve plate housing has an end hole at its end for the water inlet pipe and the water outlet pipe to pass through. Both the water inlet pipe and the water outlet pipe include a flexible section and a cooling section. The cooling section is at least partially located in the inner cavity. When the valve plate housing is in the second position, the flexible section is located in the valve port area.

6. The flue damper according to claim 2, wherein, The water outlet is located at the top of the water outlet pipe within the inner cavity, and both the water outlet and the water inlet are provided in multiple circumferential directions.

7. The flue damper according to claim 2, wherein, The bottom of the inlet pipe and the outlet pipe are fixed to the bottom wall of the valve plate box. A water tank is provided outside the flue gas valve, and the other end of the inlet pipe and the outlet pipe is connected to the water tank.

8. The flue damper according to claim 7, wherein, The water tank is located at the top of the support frame, and the water tank includes an outlet connected to the inlet pipe and a return outlet connected to the outlet pipe, with the return outlet being higher than the outlet.

9. The flue damper according to claim 1, wherein, The partition is provided in multiple ways, each partition is provided with multiple overflow holes, and each partition is provided with a through hole through which the water inlet pipe and the water outlet pipe pass.

10. The flue gas valve according to claim 2, characterized in that, The driving mechanism includes a hydraulic rod, which includes a connecting section located in the inner cavity. The connecting section is fixedly connected to the bottom wall of the inner cavity, and the hydraulic rod also includes a protective sleeve disposed at least outside the connecting section.

Images