A flue access valve

Abstract

The application discloses a flue maintenance valve, the flue is provided with a flow guide channel for guiding flue gas to flow in a preset direction, the maintenance valve is movably arranged in the flow guide channel, and has a shielding state of closing the flow guide channel to block the flue gas flow and a flow-through state of avoiding the flow guide channel to allow the flue gas to flow; the maintenance valve comprises a valve body, an internal part of the valve body is provided with a cooling cavity for containing cooling liquid, and the valve body is further provided with a liquid inlet and a liquid outlet which are in communication with the cooling cavity; the maintenance valve further comprises a circulating member which is in communication with the liquid inlet and the liquid outlet and is used for driving the cooling liquid to enter the cooling cavity through the liquid inlet and flow out through the liquid outlet, so as to form a cooling liquid circulation loop. The application provides a flue maintenance valve to solve the technical problem that the existing maintenance valve is affected by high-temperature flue gas, the valve sealing is not strict, and flue gas leakage is caused.

Description

Technical Field

[0001] This application belongs to the field of flue maintenance technology, specifically relating to a flue maintenance valve. Background Technology

[0002] Existing flue gas is discharged to a specific location through a flue. When the flue needs maintenance, the valves in the flue must be closed to seal it off. The current sealing method involves inserting the valve plate into the flue, blocking the flow channel of the flue, thereby allowing maintenance work to be carried out on the flue behind the valve plate.

[0003] However, because the gas flowing through the flue is high-temperature gas, the valve plate must continuously withstand the baking and impact of the high-temperature gas during maintenance. This directly affects the sealing performance of the connection between the valve plate and the flue. Under high temperatures, it is prone to softening, carbonization, pulverization, or oxidative wear, gradually losing its original elasticity and sealing performance, ultimately leading to seal failure. After seal failure, high-temperature flue gas will leak from the gap between the valve plate and the flue. This not only increases the temperature in the maintenance area, affecting maintenance work, but also results in the direct emission of untreated leaked flue gas, causing further leakage. In addition, frequent replacement of seals increases spare parts costs, and maintenance delays caused by leakage problems also prolong equipment downtime, affecting overall production efficiency. Utility Model Content

[0004] This application provides a maintenance valve for a flue to solve the technical problem that existing maintenance valves are affected by high-temperature flue gas, resulting in poor valve sealing and flue gas leakage.

[0005] The technical solution adopted in this application is as follows: A maintenance valve for a flue, wherein the flue is provided with a flow channel for guiding flue gas to flow in a preset direction, the maintenance valve is movably installed in the flow channel, and has a blocking state that closes the flow channel to block the flow of flue gas, and a flow state that avoids the flow channel to allow the flow of flue gas. The maintenance valve includes a valve body, inside which is a cooling chamber for containing coolant. The valve body also has an inlet and an outlet that communicate with the cooling chamber. The maintenance valve also includes a circulation component, which is connected to the inlet and outlet to drive the coolant into the cooling chamber through the inlet and out through the outlet, forming a coolant circulation loop.

[0006] The maintenance valve for a flue in this application also includes the following additional technical features: The cooling chamber is equipped with multiple guide plates, which are arranged at intervals along the flow direction of the coolant to extend the flow path of the coolant within the cooling chamber.

[0007] The outlet is located at the top of the valve body, and the inlet is located at a lower height than the outlet.

[0008] The top of the valve body is also provided with an exhaust port that connects to the cooling chamber, and the exhaust port is equipped with an exhaust valve.

[0009] The upper wall of the drainage channel is provided with an opening for the valve body to enter and exit. In the blocked state, at least part of the top of the valve body is exposed through the opening.

[0010] The valve body is provided with a contact surface for contacting flue gas, and the contact surface protrudes in the direction of flue gas inflow.

[0011] One of the flow channel and the valve body is provided with a guide groove, and the other is provided with a guide component that cooperates with the guide groove. The valve body moves along the guide groove or the guide component.

[0012] The valve under maintenance also includes a drive unit, which has a telescopic component connected to the valve body. The drive unit drives the telescopic component to extend and retract to move the valve body.

[0013] The flow channel is provided with a guide groove, the guide is the outer contour of the valve body, the valve body is provided with a contact surface for contacting the flue gas, and an elastic seal is provided on the side of the valve body away from the contact surface. The elastic seal is used to contact the groove wall of the guide groove.

[0014] The circulation component is connected to the inlet and outlet via a flow guide pipe. A fixing component is provided on one side of the valve body. The fixing component is used to fix the flow guide channel connected to the inlet. The fixing component cooperates with the guide groove.

[0015] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. This application, by incorporating a circulating coolant within a cooling chamber, effectively removes heat absorbed by the valve body due to contact with high-temperature flue gas, preventing deformation and damage caused by high temperatures and extending the valve's service life. Simultaneously, the cooling chamber helps lower the operating temperature of the seals, reducing performance degradation caused by high temperatures and preventing the valve seals connected to the valve body from being affected by high temperatures, thereby improving the valve's sealing performance and reducing the possibility of flue gas leakage. Furthermore, the cooling chamber helps maintain the mechanical properties of the valve body, ensuring smoother valve movement and preventing problems such as valve body expansion and jamming caused by high temperatures, guaranteeing reliable switching between blocked and flowing states.

[0016] 2. In a preferred embodiment of this application, multiple guide plates are arranged sequentially at intervals along the flow direction of the coolant. The guide plates guide and obstruct the flow of the coolant, forcing the coolant to flow along a tortuous path in the cooling chamber. This prolongs the residence time and flow path of the coolant in the cooling chamber, allowing the coolant and valve body to fully exchange heat, more efficiently removing the heat from the flue gas that the valve body receives, thereby enhancing the cooling effect and preventing the valve body from deforming due to heat.

[0017] Furthermore, the inlet is positioned lower than the outlet. Utilizing the characteristic that coolant decreases in density and naturally flows upwards after heating, this arrangement of a low inlet and high outlet creates a bottom-in, top-out flow pattern. Combined with the active drive of the circulation components, this promotes coolant flow, preventing localized stagnation within the cooling chamber and ensuring continuous and stable heat exchange. Moreover, during the absorption of heat from the valve body, the coolant may generate a small amount of water vapor bubbles due to localized high temperatures, or residual air may exist during initial system operation. By positioning the outlet at a higher position, these bubbles can naturally collect and dissipate with the upward flow of coolant, preventing their accumulation within the cooling chamber. Simultaneously, the bottom-in, top-out flow direction, along with the meandering path formed by the guide plates, ensures that the coolant flows from low to high while also circling multiple guide plates, further extending the actual residence time of the coolant within the cooling chamber. This doubly enhances heat exchange efficiency, allowing for faster removal of the high temperature from the valve body.

[0018] Furthermore, an exhaust port is provided at the top of the valve body, and an exhaust valve is installed at the exhaust port. The exhaust port can directly collect and discharge the gas in the cooling chamber, avoiding poor cooling effect due to gas residue.

[0019] Furthermore, the upper wall of the drainage channel has an opening, providing a stable space for the valve body to move freely, allowing it to enter and exit the channel without obstruction. This ensures the valve body can smoothly complete its lifting and lowering movements, enabling rapid and precise switching between the flow-through and obstructed states of the drainage channel, guaranteeing the continuity and stability of the flue system. In the obstructed state, at least part of the top of the valve body exposes the opening. The exposed top area requires no additional space and can be directly used to install the top liquid outlet, simplifying the installation process. Simultaneously, the exposed top portion facilitates the installation and maintenance of the exhaust valve. This allows the exhaust valve to quickly discharge gas from the channel, reducing the impact of gas resistance on the system, and allows personnel to directly access the exhaust valve for inspection, cleaning, or repair without disassembling the entire channel, significantly reducing maintenance difficulty and time costs.

[0020] 3. In a preferred embodiment of this application, by setting the contact surface to protrude in the direction of flue gas inflow, the contact area between the contact surface and the flue gas is increased, allowing heat to be transferred more evenly to the valve body. Combined with the guide plate and coolant circulation in the cooling chamber, the heat absorbed by the contact surface can be quickly carried away, avoiding local overheating and improving the overall heat exchange efficiency.

[0021] 4. As a preferred embodiment of this application, by providing a guide groove and guide component in cooperation, the valve body can move smoothly and accurately switch between the blocking state and the flow state to meet the operating requirements. At the same time, the guide groove and guide component provide accurate installation positioning for the valve body, improving maintenance efficiency.

[0022] Furthermore, the driving force of the telescopic component, together with the guide groove and the trajectory constraint of the guide component, enables the valve body to move stably in a specific direction, reducing deviation or swaying and ensuring the consistency and reliability of the valve body's movements.

[0023] 5. In a preferred embodiment of this application, the outer contour of the valve body directly mates with the guide groove of the flow channel, eliminating the need for additional guide components. This simplifies the structure while enhancing guiding accuracy and resistance to eccentric loads by utilizing the large-area fit between the valve body contour and the groove. An elastic seal is provided on the side away from the flue gas contact surface. This elastic seal abuts against the groove wall of the guide groove, filling the gap between the valve body and the groove wall, preventing flue gas leakage from the guide mating point, and supplementing the sealing effect of the contact surface. Furthermore, the elastic seal absorbs slight vibrations and positioning errors during valve movement, reducing rigid collisions and providing buffering during flue gas impact, preventing the guide mating from jamming. It also adapts to flue gas pressure, achieving dynamic sealing: when flue gas impacts the contact surface, the valve body is slightly shifted away from the flue gas, causing the elastic seal to fit tightly against the guide groove wall. The higher the flue gas pressure, the stronger the sealing force, further reducing the risk of leakage.

[0024] 6. As a preferred embodiment of this application, the setting of the fixing component facilitates the installation of the guide pipe, enabling the guide pipe to move with the valve body, ensuring that the guide pipe can move orderly along the installation groove when the maintenance valve is switching states, and ensuring the continuity of the coolant circulation loop. Attached Figure Description

[0025] 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: Figure 1 This is a schematic diagram of the flue structure according to one embodiment of this application; Figure 2This is a schematic diagram of the installation of the flue and maintenance gate according to one embodiment of this application; Figure 3 This is a schematic diagram of the installation of the maintenance valve and guide groove according to one embodiment of this application.

[0026] List of components and reference numerals: 1. Flue; 11. Drainage channel; 12. Guide groove; 2. Inspection valve; 21. Valve body; 211. Fixing component; 22. Cooling chamber; 23. Liquid inlet; 24. Liquid outlet; 25. Drain plate; 26. Exhaust port; 27. Exhaust valve; 28. Driving component; 281. Telescopic component; 29. ​​Elastic seal; 3. Circulation components; 31. Flow guiding pipes. Detailed Implementation

[0027] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figure 1 , Figure 2 , Figure 3 As shown, a maintenance valve for a flue is provided. The flue 1 is provided with a flow channel 11 that guides the flue gas to flow in a preset direction. The maintenance valve 2 is movably disposed in the flow channel 11 and has a blocking state that closes the flow channel 11 to block the flow of flue gas, and a flow state that avoids the flow channel 11 to allow the flow of flue gas. The maintenance valve 2 includes a valve body 21, and the inside of the valve body 21 is provided with a cooling chamber 22 for containing coolant. The valve body 21 is also provided with an inlet 23 and an outlet 24 that communicate with the cooling chamber 22. The maintenance valve 2 also includes a circulation component 3, which is connected to the inlet 23 and the outlet 24. It is used to drive the coolant into the cooling chamber 22 through the inlet 23 and out through the outlet 24 to form a coolant circulation loop.

[0033] This application, by incorporating a circulating coolant within the cooling chamber 22, effectively removes heat absorbed by the valve body 21 due to contact with high-temperature flue gas. This prevents deformation and damage to the valve body 21 caused by high temperatures, extending the valve's service life. Simultaneously, the cooling chamber 22 helps lower the operating temperature of the seals, reducing performance degradation caused by high temperatures. It also prevents the valve seals connected to the valve body 21 from being affected by high temperatures, thereby improving the valve's sealing performance and reducing the possibility of flue gas leakage. Furthermore, the cooling chamber 22 helps maintain the mechanical properties of the valve body 21, ensuring smoother valve movement and preventing problems such as expansion and jamming of the valve body 21 due to high temperatures. This guarantees reliable switching between blocked and flowing states.

[0034] Those skilled in the art will understand that the preset direction is the axial direction of the drainage channel 11, such as... Figure 2 As shown, the flue gas flows in a direction perpendicular to... Figure 2 The direction of the plane in which it is located.

[0035] In this application, the coolant flow guidance configuration can be any of the following embodiments: Implementation method one: such as Figure 1 , Figure 2 , Figure 3 As shown, the cooling chamber 22 is equipped with multiple guide plates 25, which are arranged at intervals along the flow direction of the coolant to extend the flow path of the coolant within the cooling chamber 22. Figure 2 As shown, the coolant enters from the right and flows to the left.

[0036] Multiple guide plates 25 are arranged sequentially and at intervals along the flow direction of the coolant. The guide plates 25 guide and obstruct the flow of the coolant, forcing the coolant to flow along a tortuous path within the cooling chamber 22. This prolongs the residence time and flow path of the coolant within the cooling chamber 22, allowing for sufficient heat exchange between the coolant and the valve body 21. This more efficiently removes the heat from the flue gas affecting the valve body 21, thereby enhancing the cooling effect and preventing the valve body 21 from deforming due to heat. Furthermore, the multiple guide plates 25 are divided into first guide plates and second guide plates. The upper end of the first guide plate is connected to the top wall of the cooling chamber 22, and the lower end is spaced apart from the bottom wall of the cooling chamber 22. The lower end of the second guide plate is connected to the bottom wall of the cooling chamber 22, and the upper end is spaced apart from the top wall of the cooling chamber 22. The multiple first guide plates and multiple second guide plates are distributed in an alternating pattern within the cooling chamber 22. Those skilled in the art will understand that, in addition to the arrangement of the diversion plate 25 described above, the right side wall of the first diversion plate can be connected to the right wall of the cooling cavity 22, and the left side wall can be spaced apart from the left wall of the cooling cavity 22; the left side wall of the second diversion plate can be connected to the left wall of the cooling cavity 22, and the right side wall can be spaced apart from the right wall of the cooling cavity 22.

[0037] Implementation Method 2: This implementation method is not illustrated. One end of the cooling chamber is connected to the liquid inlet, and the other end is arranged in a curved path towards the liquid outlet. The overall outline of the cooling chamber covers the heated area of ​​the valve body.

[0038] In Embodiment 1, the liquid inlet 23 and the liquid outlet 24 can be configured in any of the following embodiments: Example 1: As Figure 1 , Figure 2 , Figure 3 As shown, the liquid outlet 24 is located at the top of the valve body 21, and the liquid inlet 23 is located at a lower height than the liquid outlet 24.

[0039] The inlet 23 is positioned lower than the outlet 24. Utilizing the characteristic that coolant decreases in density and naturally flows upwards after heating, the arrangement of the inlet 23 being low and the outlet 24 high creates a bottom-in, top-out flow trend. Combined with the active drive of the circulation component 3, this promotes coolant flow, preventing localized stagnation within the cooling chamber 22 and ensuring continuous and stable heat exchange. Furthermore, during the absorption of heat from the valve body 21, the coolant may generate a small amount of water vapor bubbles due to localized high temperatures, or residual air may exist during initial system operation. By positioning the outlet 24 at a higher position, these bubbles can naturally collect and dissipate with the upward flow of coolant, preventing stagnation within the cooling chamber 22. Simultaneously, the bottom-in, top-out flow direction, along with the meandering path formed by the guide plates 25, ensures that the coolant flows from low to high while also bypassing multiple guide plates 25, further extending the actual residence time of the coolant within the cooling chamber 22. This dual improvement in heat exchange efficiency allows for faster removal of the high temperature from the valve body 21.

[0040] Example 2: This example 2 is not illustrated. The height of the liquid inlet is the same as the height of the liquid outlet.

[0041] As a preferred specific example 1 under implementation 1 and embodiment 2, such as Figure 1 , Figure 2 , Figure 3 As shown, the top of the valve body 21 is provided with an exhaust port 26 that communicates with the cooling chamber 22, and the exhaust port 26 is equipped with an exhaust valve 27.

[0042] An exhaust port 26 is provided on the top of the valve body 21. The exhaust port 26 is equipped with an exhaust valve 27. The exhaust port 26 can directly collect and discharge the gas in the cooling chamber 22, avoiding poor cooling effect due to gas residue.

[0043] In specific example 1, the movement setting of the valve body 21 can be any of the following examples: Example 1: The upper wall of the drainage channel 11 has an opening for the valve body 21 to enter and exit. In the blocked state, at least part of the top of the valve body 21 is exposed through the opening. In Example 1, the valve body 21 moves upward out of the drainage channel 11.

[0044] The upper wall of the flow channel 11 has an opening, providing a stable space for the valve body 21 to move freely in and out of the channel. This ensures that the valve body 21 can smoothly complete its lifting and lowering movements, thereby quickly and accurately switching between the flow channel 11's flow-through and obstructed states, ensuring the continuity and stability of the flue duct 1 system. In the obstructed state, at least part of the top of the valve body 21 is exposed through the opening. The exposed top area does not require additional space and can be directly used to install the top liquid outlet 24, simplifying the installation process of the liquid outlet 24. At the same time, the exposed top portion facilitates the installation and maintenance of the exhaust valve 27. This allows the exhaust valve 27 to quickly discharge gas from the channel, reducing the impact of gas resistance on the system. It also allows personnel to directly access the exhaust valve 27 for inspection, cleaning, or repair without disassembling the entire channel, significantly reducing maintenance difficulty and time costs.

[0045] Example 2: Not illustrated in Example 2, the upper wall of the drainage channel has a clearance groove corresponding to the position of the exhaust valve. The clearance groove has a vent hole extending towards the side opposite to the valve body, and the vent hole communicates with the drainage channel. The lower wall of the drainage channel has an opening for the valve body to enter and exit. In Example 2, the valve body moves downwards and out of the drainage channel.

[0046] By incorporating a clearance groove, the exhaust valve is provided with independent installation and operation space, preventing the exhaust valve from being obstructed or squeezed by the pipe wall of the drainage channel. The vent hole guides the gas discharged from the exhaust valve into the drainage channel, ensuring an unobstructed exhaust process.

[0047] As a preferred example 2 under specific example 1, the valve body 21 is provided with an abutting surface for abutting the flue gas, and the abutting surface is arranged to protrude in the direction of flue gas inflow.

[0048] By designing the contact surface to protrude in the direction of flue gas inflow, the contact area between the contact surface and the flue gas is increased, allowing heat to be transferred more evenly to the valve body 21. Combined with the guide plate 25 in the cooling chamber 22 and the circulation of coolant, the heat absorbed by the contact surface can be quickly carried away, avoiding local overheating and improving the overall heat exchange efficiency.

[0049] As a preferred embodiment of this application, such as Figure 1 , Figure 2 , Figure 3 As shown, one of the drainage channel 11 and the valve body 21 is provided with a guide groove 12, and the other is provided with a guide member that cooperates with the guide groove 12. The valve body 21 moves along the guide groove 12 or the guide member. Figure 2 As shown, the valve body 21 moves in the vertical direction.

[0050] By setting the guide groove 12 in cooperation with the guide component, the valve body 21 can move smoothly and accurately switch between the blocking state and the flow state to meet the operating requirements. At the same time, the guide groove 12 and the guide component provide accurate installation positioning for the valve body 21, improving maintenance efficiency.

[0051] In embodiment three, the driving configuration of the valve body 21 can be any one of the following embodiments: Example 3: As Figure 1 , Figure 2 , Figure 3 As shown, the maintenance valve 2 also includes a drive component 28, which has a telescopic component 281 connected to the valve body 21. The drive component 28 drives the telescopic component 281 to extend and retract, thereby moving the valve body 21. Preferably, the circulation component 3 moves up and down with the valve body 21.

[0052] The driving force of the telescopic component 281, together with the guide groove 12 and the trajectory constraint of the guide component, enables the valve body 21 to move stably in a specific direction, reducing deviation or shaking, and ensuring the consistency and reliability of the valve body 21's operation.

[0053] Example 4: The attached drawings for Example 4 are not shown. The bottom of the valve is equipped with a lifting handle. The valve body is moved by lifting the handle.

[0054] In embodiment three, the driving configuration of the valve body 21 can be any one of the following embodiments: Example 5: Figure 1 , Figure 2 , Figure 3 As shown, the flow channel 11 is provided with a guide groove 12, and the guide is the outer contour of the valve body 21. The valve body 21 is provided with an abutment surface for abutting the flue gas. An elastic seal 29 is provided on the side of the valve body 21 away from the abutment surface. The elastic seal 29 is used to abut against the groove wall of the guide groove 12. Preferably, the flow channel 11 is provided with guide grooves 12 in all directions. The guide grooves 12 have openings of the valve body 21. The guide grooves 12 are also provided with clamping members. There are two clamping members. The two clamping members are respectively provided at the front end and rear end of the valve body 21 along the flue gas entry direction. The clamping members are telescopically arranged in the guide groove. A sealing member is provided at the opposite end of the two clamping members. The telescopic movement of the clamping members causes the sealing member to abut against the valve body 21 to further achieve the sealing of the flue 1.

[0055] The outer contour of the valve body 21 acts as a guide, directly engaging with the guide groove 12 of the flow channel 11. This eliminates the need for additional guide components, simplifying the structure while enhancing guiding accuracy and resistance to eccentric loads through the large-area contact between the valve body contour and the groove. An elastic seal 29 is installed on the side away from the flue gas contact surface. This seal 29 abuts against the groove wall of the guide groove 12, filling the gap between the valve body 21 and the groove wall, preventing flue gas leakage from the guide engagement point, and supplementing the sealing effect of the contact surface. Furthermore, the elastic seal absorbs slight vibrations and positioning errors during valve movement, reducing rigid collisions and providing buffering during flue gas impact, preventing guide engagement jamming. It also adapts to flue gas pressure, achieving dynamic sealing: when flue gas impacts the contact surface, the valve body 21 is slightly shifted away from the flue gas, causing the elastic seal 29 to fit tightly against the groove wall of the guide groove 12. The higher the flue gas pressure, the stronger the sealing force, further reducing the risk of leakage.

[0056] Furthermore, the circulation component 3 is connected to the inlet 23 and the outlet 24 via the flow guide pipe 31. A fixing component 211 is provided on one side of the valve body 21. The fixing component 211 is used to fix the flow guide pipe 31 connected to the inlet 23, and the fixing component 211 cooperates with the guide groove 12. Furthermore, the fixing component 211 is detachably connected to the valve body 21 by means of snap-fit ​​or magnetic attraction. At the same time, those skilled in the art will understand that the fixing component 211 and the valve body 21 can also be fixedly connected. Preferably, the flow guide pipe 31 is a flexible pipe.

[0057] The installation of the fixing component 211 facilitates the installation of the guide pipe 31, enabling the guide pipe 31 to move with the valve body 21. This ensures that the guide pipe 31 can move orderly along the installation groove when the maintenance valve is in a switching state, thus ensuring the continuity of the coolant circulation loop.

[0058] Example 6: This example 6 is not shown in the figure. There are two guide members, which are respectively set on the two side walls of the valve body.

[0059] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0060] 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.

[0061] 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 maintenance valve for a flue, characterized in that, The flue is provided with a flow channel to guide the flue gas to flow in a preset direction. The maintenance valve is movably installed in the flow channel and has a blocking state to close the flow channel to block the flow of flue gas, and a flow state to avoid the flow channel to allow the flow of flue gas. The maintenance valve includes a valve body, the inside of which is provided with a cooling chamber for containing coolant, and the valve body is also provided with an inlet and an outlet communicating with the cooling chamber; The maintenance valve also includes a circulation component, which is connected to the inlet and the outlet, and is used to drive the coolant into the cooling chamber through the inlet and out through the outlet to form a coolant circulation loop.

2. The maintenance valve for a flue according to claim 1, characterized in that, The cooling chamber is provided with multiple guide plates, which are arranged sequentially at intervals along the flow direction of the coolant to extend the flow path of the coolant within the cooling chamber.

3. The maintenance valve for a flue according to claim 2, characterized in that, The liquid outlet is located at the top of the valve body, and the liquid inlet is located at a lower height than the liquid outlet.

4. The maintenance valve for a flue according to claim 3, characterized in that, The top of the valve body is also provided with an exhaust port that connects to the cooling chamber, and the exhaust port is equipped with an exhaust valve.

5. A maintenance valve for a flue according to claim 4, characterized in that, The upper wall of the drainage channel is provided with an opening for the valve body to enter and exit. In the blocked state, at least part of the top of the valve body is exposed through the opening.

6. The maintenance valve for a flue according to claim 4, characterized in that, The valve body is provided with a contact surface for abutting the flue gas, and the contact surface protrudes in the direction of flue gas inflow.

7. The maintenance valve for a flue according to claim 1, characterized in that, One of the drainage channel and the valve body is provided with a guide groove, and the other of the two is provided with a guide member that cooperates with the guide groove. The valve body moves along the guide groove or the guide member.

8. The maintenance valve for a flue according to claim 7, characterized in that, The maintenance valve also includes a drive component, which has a telescopic component connected to the valve body. The drive component drives the telescopic component to extend and retract to move the valve body.

9. A maintenance valve for a flue according to claim 7, characterized in that, The flow channel is provided with the guide groove, the guide is the outer contour of the valve body, the valve body is provided with an abutting surface for abutting the flue gas, and an elastic sealing element is provided on the side of the valve body away from the abutting surface, the elastic sealing element is used to abut against the groove wall of the guide groove.

10. A maintenance valve for a flue according to claim 9, characterized in that, The circulation component is connected to the inlet and the outlet via a flow guide pipe. A fixing component is provided on one side of the valve body. The fixing component is used to fix the flow guide pipe that is connected to the inlet. The fixing component cooperates with the guide groove.

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