High-temperature-resistant flue main pipe bypass valve

Abstract

The utility model relates to the technical field of bypass valves, in particular to a high-temperature-resistant flue main pipe bypass valve which comprises a valve body shell, an air inlet is formed in one side of the valve body shell, an air outlet is formed in the other side of the valve body shell, and an air inlet channel is formed in the side, close to the air inlet, of the valve body shell. An air outlet channel is formed in the side, close to the air outlet, of the valve body shell, a sliding rod is slidably installed on the other side of the valve body shell and penetrates into the air outlet channel, a valve element for blocking the communicating position of the air outlet channel and the air inlet channel is slidably installed on one side of the sliding rod, and a reset spring is arranged on the side, away from the air inlet channel, of the air outlet channel; the other side of the reset spring is fixedly connected with one side of the valve element, and a heat dissipation module is arranged in the air inlet channel. Compared with the prior art, by arranging the heat dissipation module, the flue gas temperature can be rapidly reduced, turbulent flow is formed, the laminar flow of the main channel is broken, and heat damage or structural deformation caused by local accumulation of high-temperature flue gas is prevented.

Description

Technical Field

[0001] This utility model relates to the field of bypass valve technology, and in particular to a high-temperature resistant flue main bypass valve. Background Technology

[0002] In high-temperature flue gas emission systems such as those in thermal power plants, industrial kilns, and metallurgical systems, bypass valves are typically installed in the main flue gas duct to divert, guide, or control the emergency release of high-temperature flue gas. As a critical control component, the structural design and material selection of the bypass valve directly affect the safety and stability of the entire exhaust system.

[0003] In the prior art, Chinese patent document CN218992434U, concerning a bypass valve, proposes that when the two valve bodies are located at the lower part of the inlet intermediate box, flue gas flows in from the inlet intermediate box and flows out from the outlet on the outer wall of the outlet upper box. When the cylinder receives a control command to lift the valve rod, the two valve bodies will rise to the upper part of the inlet intermediate box, blocking the upward flow of flue gas, which then flows out from the outlet lower box through the outlet port 2. This achieves a reasonable planning of the flue gas flow direction, a simplified structure, simple operation, and reduced flue gas flow loss. Consistent with traditional methods, in... Under high-temperature conditions, if the flue gas in the channel cannot be discharged or cooled in time, the heat will continue to accumulate, causing the temperature of the channel wall to rise continuously. This will cause the metal material to thermally expand or even creep. After long-term operation, cracks or permanent deformation may occur, reducing the structural sealing and mechanical strength. In severe cases, it will cause safety hazards or functional failure. In addition, traditional bypass valves have a single gas flow path. If laminar flow is maintained for a long time, it will result in low heat dissipation efficiency and easily form local high-temperature areas. Heat exchange is limited to boundary layer conduction, and heat is difficult to be quickly transferred to the heat dissipation surface. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a high-temperature resistant flue main bypass valve to solve the problem that if flue gas cannot be discharged in time or effectively dissipated under high-temperature conditions, it is easy to cause overheating of the channel, structural deformation and local high temperature accumulation.

[0005] To achieve the above objectives, this utility model provides a high-temperature resistant flue main bypass valve, comprising a valve body housing, an air inlet on one side of the valve body housing, an air outlet on the other side of the valve body housing, an air inlet channel on the side of the valve body housing near the air inlet, and an air outlet channel on the side of the valve body housing near the air outlet, the air outlet channel and the air inlet channel being interconnected, a sliding rod slidably mounted on the other side of the valve body housing, an extension plate on one side of the valve body housing, a valve switch rotatably mounted on one side of the extension plate, one side of the valve switch being rotatably connected to one side of the sliding rod, the sliding rod penetrating into the interior of the air outlet channel, a valve core slidably mounted on one side of the sliding rod to block the connection between the air outlet channel and the air inlet channel, a return spring on the side of the air outlet channel away from the air inlet channel, the other side of the return spring being fixedly connected to one side of the valve core, a heat dissipation module inside the air inlet channel, and a guide module at the bottom of the interior of the air outlet channel;

[0006] The heat dissipation module is used to dissipate heat and allow circulation when high-temperature flue gas accumulates inside the air intake channel.

[0007] The guide module is used to prevent high-temperature flue gas from accumulating at the bottom of the outlet channel and affecting the valve body.

[0008] Preferably, the heat dissipation module includes heat dissipation channels formed on both sides of the inner wall of the air intake channel. Air intake screens are provided on both sides of the top of the air intake channel, and the two air intake screens are respectively connected to the two heat dissipation channels. Narrow reflux ports are provided on both sides of the bottom of the air intake channel, and the reflux ports are connected to the bottom of the heat dissipation channel. The high-temperature flue gas rises inside the air intake channel, enters the heat dissipation channel through the air intake screens, and is cooled before rushing out from the reflux ports.

[0009] Preferably, the sidewall of the heat dissipation channel near the interior of the air intake channel is provided with a high-temperature resistant insulation layer to enhance the high-temperature resistance of the air intake channel; the side of the heat dissipation channel away from the air intake channel is provided with a high thermal conductivity heat dissipation layer to enhance the cooling effect of the flowing flue gas in the heat dissipation channel.

[0010] Preferably, the guiding module includes a guide plate fixedly installed at the bottom of the air outlet channel. The guide plate is arc-shaped, and a guide block is provided at the top center of the guide plate. A guide groove is provided between the guide plate and the guide block at intervals. A guide inlet groove and a guide outlet groove are respectively opened on both sides of the guide plate. The guide inlet groove and the guide outlet groove are respectively connected to the two ends of the guide groove.

[0011] Preferably, the bottom surface of the guide block is in contact with the guide plate, and both sides of the top surface of the guide block are rounded.

[0012] Preferably, both the air inlet and the air outlet have internal threads on their inner sides.

[0013] Preferably, a limit ring is provided in the middle of the sliding rod, and the limit ring is used to limit the sliding distance of the valve core.

[0014] The beneficial effects of this utility model are:

[0015] 1. This high-temperature resistant flue gas main bypass valve features a heat dissipation module. By incorporating heat dissipation channels on both sides of the intake channel, it creates a "top intake – sidewall cooling – bottom return" airflow circulation path, effectively guiding high-temperature flue gas into the heat dissipation circuit without affecting the main flow direction. The inner side of the heat dissipation channel is coated with alumina ceramic or mullite to enhance temperature resistance, while the outer side uses graphite-reinforced composite materials or copper-based materials to improve thermal conductivity. This rapidly reduces flue gas temperature and creates turbulence, breaking the laminar flow in the main channel, improving overall heat exchange efficiency, preventing localized accumulation of high-temperature flue gas that could cause thermal damage or structural deformation, and significantly enhancing the thermal stability and service life of the valve system.

[0016] 2. This high-temperature resistant flue gas main bypass valve features a guide module. A central guide groove is formed between the guide plate and guide block, connecting the inlet and outlet slots, achieving orderly turbulence and redirection of gas flow at the bottom. This structure allows some flue gas to bypass the main flow path, reducing the accumulation of high-temperature gas at the bottom and avoiding the risk of carbon buildup and ablation. Simultaneously, the guide path provides auxiliary pressure relief, stabilizing the airflow pressure and velocity distribution. The arc-shaped top of the guide block increases the lift height of the main airflow, helping to optimize the overall exhaust path, improve exhaust efficiency and valve core response sensitivity, thereby achieving more efficient and reliable bypass exhaust control. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for 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 three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the air intake channel of this utility model;

[0020] Figure 3 This utility model Figure 2Enlarged structural diagram at point A in the middle;

[0021] Figure 4 This is a schematic cross-sectional view of the overall structure of this utility model;

[0022] Figure 5 This utility model Figure 4 Enlarged structural diagram at point B;

[0023] Figure 6 This is a three-dimensional structural diagram of the guide plate of this utility model;

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the guide plate of this utility model.

[0025] The diagram is marked as follows:

[0026] 1. Valve body housing; 2. Air inlet; 3. Air outlet; 4. Sliding rod; 5. Air outlet channel; 6. Valve core; 7. Return spring; 8. Extension plate; 9. Valve body switch; 10. Limit ring; 11. Air inlet channel; 12. Air inlet mesh; 13. Heat dissipation channel; 14. Return port; 15. Guide plate; 16. Guide groove; 17. Guide air inlet groove; 18. Guide air outlet groove; 19. Guide block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] like Figures 1 to 7As shown, a high-temperature resistant flue main bypass valve includes a valve body 1. An air inlet 2 is provided on one side of the valve body 1, and an air outlet 3 is provided on the other side. An air inlet channel 11 is provided on the side of the valve body 1 near the air inlet 2, and an air outlet channel 5 is provided on the side of the valve body 1 near the air outlet 3. The air outlet channel 5 and the air inlet channel 11 are interconnected. A sliding rod 4 is slidably mounted on the other side of the valve body 1. An extension plate 8 is provided on one side of the valve body 1, and a valve body switch 9 is rotatably mounted on one side of the extension plate 8. One side of the valve body switch 9 is rotatably mounted on one side of the sliding rod 4. The sliding rod 4 extends through the interior of the air outlet channel 5. A valve core 6 is slidably installed on one side of the sliding rod 4 to block the connection between the air outlet channel 5 and the air inlet channel 11. A return spring 7 is provided on the side of the air outlet channel 5 away from the air inlet channel 11. The other side of the return spring 7 is fixedly connected to one side of the valve core 6. A heat dissipation module is provided inside the air inlet channel 11. A guide module is provided at the bottom of the interior of the air outlet channel 5. The inner sides of the air inlet 2 and the air outlet 3 are both provided with internal threads. A limit ring 10 is provided in the middle of the sliding rod 4. The limit ring 10 is used to limit the sliding distance of the valve core 6.

[0030] Under normal conditions, valve core 6 is in a blocked state. Even when the valve is in the open position, the intake passage 11 and the outlet passage 5 are still structurally blocked by valve core 6 to prevent high-temperature flue gas from flowing accidentally under low pressure. Only when the flue gas pressure reaches a set threshold can the spring force of the return spring 7 be overcome, pushing valve core 6 to compress the spring along the sliding rod 4, opening the outlet passage 5, and realizing automatic pressure relief or bypass ventilation. When valve core 6 is not pushed and outlet passage 5 is not open, the heat dissipation module plays a crucial role, and the flue gas in intake passage 11 is in a stagnant or slow-flowing state, easily... The heat dissipation module passively circulates heat to reduce local temperature rise and prevent material damage or thermal stress concentration. At the same time, the bypass valve structure allows the operator to drive the sliding rod 4 axially by adjusting the outer valve body switch 9, thereby causing the limit ring 10 to abut against the moving end of the valve core 6, forming a mechanical limit. This allows the operator to manually control the stroke of the valve core 6 or lock its position. Even if the internal pressure of the system increases, it will not be able to push the valve core 6 to continue moving, thereby achieving the purpose of restricting the passage of flue gas or temporarily closing the bypass function, enhancing the safety and flexibility of equipment operation.

[0031] like Figures 1 to 4As shown, the heat dissipation module includes heat dissipation channels 13 formed on both sides of the inner wall of the air intake channel 11. Air intake mesh 12 is provided on both sides of the top of the air intake channel 11, and the two air intake meshes 12 are respectively connected to the two heat dissipation channels 13. Narrow, elongated return ports 14 are provided on both sides of the bottom of the air intake channel 11, and the return ports 14 are connected to the bottom of the heat dissipation channel 13. High-temperature flue gas rises inside the air intake channel 11, enters the heat dissipation channel 13 through the air intake mesh 12, and after cooling, exits from the return ports 14. A high-temperature resistant heat insulation layer is provided on the side wall of the heat dissipation channel 13 closest to the inside of the air intake channel 11 to enhance the high-temperature resistance of the air intake channel 11. A high thermal conductivity heat dissipation layer is provided on the side of the heat dissipation channel 13 away from the air intake channel 11 to enhance the cooling effect of the flowing flue gas in the heat dissipation channel 13.

[0032] High-temperature flue gas enters the intake channel 11 through the intake port 2. During the flow, some of the flue gas, under the action of buoyancy, passes through the intake mesh 12 set on both sides of the top of the intake channel 11 and enters the corresponding heat dissipation channel 13. The inner wall of the heat dissipation channel 13 near the intake channel 11 is provided with a high-temperature resistant heat insulation layer to prevent heat from being transferred back to the main channel, while the side away from the intake channel 11 is provided with a heat dissipation layer with excellent thermal conductivity to efficiently guide the heat of the flue gas to be released to the outside, thereby quickly cooling the internal flue gas. The cooled flue gas gradually settles in the heat dissipation channel 13 and is discharged through the return port 14 set at its bottom. The return port 14 has a narrow structure, forming a certain back pressure, so that the discharged airflow is circulated back during the return process. When the cooling flue gas is re-injected into the intake channel 11 through the return port 14, it generates a certain speed and disturbance, which can create a turbulent effect on the original high-temperature flue gas in the intake channel 11, breaking its laminar flow state. This is conducive to the uniform distribution of heat and accelerating the overall heat dissipation speed of the high-temperature gas in the main channel. The side close to the intake channel 11 is provided with a high-temperature resistant heat insulation layer (such as alumina ceramic spraying or mullite heat insulation material), which can significantly improve the overall thermal stability of the intake channel 11 and prevent heat from being conducted in reverse and causing damage to the internal components. The side away from the intake channel 11 is provided with a high thermal conductivity heat dissipation layer (such as graphite reinforced composite material or copper-based material), which can quickly dissipate heat, improve heat dissipation efficiency, and reduce the thermal impact of high-temperature flue gas on the structural wall.

[0033] like Figures 4 to 7 As shown, the guide module includes a guide plate 15 fixedly installed at the bottom of the air outlet channel 5. The guide plate 15 is arc-shaped. A guide block 19 is provided at the top center of the guide plate 15. A guide groove 16 is provided between the guide plate 15 and the guide block 19. A guide inlet groove 17 and a guide outlet groove 18 are respectively opened on both sides of the guide plate 15. The guide inlet groove 17 and the guide outlet groove 18 are respectively connected to the two ends of the guide groove 16. The bottom surface of the guide block 19 is in contact with the guide plate 15. Both sides of the top surface of the guide block 19 are arc-shaped.

[0034] When high-temperature flue gas enters through the inlet channel 11 and pushes the valve core 6 to open, the gas quickly enters the outlet channel 5. Some of the airflow will sink to the bottom and contact the surface of the guide plate 15, and be guided to concentrate towards the center along its arc structure. After the airflow forms the guide groove 16 channel between the guide plate 15 and the guide block 19, it continues to flow, enters the middle of the channel along the guide inlet groove 17, and is then discharged through the guide outlet groove 18, completing an organized "bottom turbulence - lateral turning - re-ascent" process. At the same time, the presence of the guide block 19 allows the main airflow to avoid the bottom of the channel, effectively raising the mainstream line and avoiding direct impact of high-temperature gas at the bottom, reducing the risk of carbon buildup and thermal fatigue. The through structure of the guide groove 16 provides a pressure relief path for some low-speed gas, so that the outlet channel 5 as a whole maintains a balanced flow rate and stable pressure. The arc shape of the top surface of the guide block 19 further stabilizes the upward path of the main airflow, improving the overall flue gas efficiency and system response speed.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0036] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high temperature resistant flue main bypass valve characterized by, include: A valve body housing (1) has an air inlet (2) on one side and an air outlet (3) on the other side. An air inlet channel (11) is provided on the side of the valve body housing (1) near the air inlet (2), and an air outlet channel (5) is provided on the side of the valve body housing (1) near the air outlet (3). The air outlet channel (5) and the air inlet channel (11) are interconnected. A sliding rod (4) is slidably installed on the other side of the valve body housing (1). An extension plate (8) is provided on one side of the valve body housing (1), and a valve switch is rotatably installed on one side of the extension plate (8). (9) One side of the valve body switch (9) is rotatably connected to one side of the sliding rod (4). The sliding rod (4) extends through the interior of the air outlet channel (5). A valve core (6) is slidably installed on one side of the sliding rod (4) to block the connection between the air outlet channel (5) and the air inlet channel (11). A return spring (7) is provided on the side of the air outlet channel (5) away from the air inlet channel (11). The other side of the return spring (7) is fixedly connected to one side of the valve core (6). A heat dissipation module is provided inside the air inlet channel (11). A guide module is provided at the bottom of the interior of the air outlet channel (5). The heat dissipation module is used to dissipate heat when high-temperature flue gas accumulates inside the air intake channel (11); The guide module is used to prevent high-temperature flue gas from accumulating at the bottom of the outlet channel (5) and affecting the valve body.

2. The high-temperature flue main bypass valve according to claim 1, characterized by The heat dissipation module includes heat dissipation channels (13) formed on both sides of the inner wall of the air intake channel (11). Air intake nets (12) are provided on both sides of the top of the air intake channel (11), and the two air intake nets (12) are respectively connected to the two heat dissipation channels (13). Narrow reflux ports (14) are provided on both sides of the bottom of the air intake channel (11). The reflux ports (14) are connected to the bottom of the heat dissipation channel (13). The high-temperature flue gas rises inside the air intake channel (11), enters the heat dissipation channel (13) through the air intake nets (12), and is cooled and then rushes out from the reflux ports (14).

3. The high temperature flue main bypass valve of claim 2, wherein The heat dissipation channel (13) has a high-temperature resistant heat insulation layer on the side wall near the inside of the air intake channel (11) to enhance the high-temperature resistance of the air intake channel (11); the side of the heat dissipation channel (13) away from the air intake channel (11) is provided with a high thermal conductivity heat dissipation layer to enhance the cooling effect of the flue gas flowing in the heat dissipation channel (13).

4. The high temperature flue main bypass valve of claim 1, wherein The guiding module includes a guide plate (15) fixedly installed at the bottom of the air outlet channel (5). The guide plate (15) is arc-shaped. A guide block (19) is provided at the top center of the guide plate (15). A guide groove (16) is provided between the guide plate (15) and the guide block (19). A guide inlet groove (17) and a guide outlet groove (18) are respectively opened on both sides of the guide plate (15). The guide inlet groove (17) and the guide outlet groove (18) are respectively connected to the two ends of the guide groove (16).

5. The high temperature flue main bypass valve of claim 4 wherein, The bottom surface of the guide block (19) is in contact with the guide plate (15), and both sides of the top surface of the guide block (19) are set in an arc shape.

6. The high temperature flue main bypass valve of claim 1, wherein Both the air inlet (2) and the air outlet (3) have internal threads on their inner sides.

7. The high temperature flue main bypass valve of claim 1, wherein A limiting ring (10) is provided in the middle of the sliding rod (4), and the limiting ring (10) is used to limit the sliding distance of the valve core (6).

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