Liquid cooling high-temperature flue gate valve

Abstract

The invention discloses a liquid cooling high-temperature flue gate valve, and relates to the technical field of high-temperature flue valves. The middle part of the flue valve body is provided with a flue gas flow channel for flue gas to circulate; the flue valve plate is in sliding connection with the flue valve body, and a heat exchange medium runner is arranged in the flue valve plate; an outlet of the first medium storage device is connected with an inlet of the heat exchange medium flow channel through a first temperature control valve, and the first medium storage device is arranged in the flue; the first circulating pump is connected between an outlet of the heat exchange medium flow channel and an inlet of the first medium storage device; an outlet of the second medium storage device is connected with an inlet of the heat exchange medium flow channel through a second temperature control valve; the second circulating pump is connected between an outlet of the heat exchange medium flow channel and an inlet of the second medium storage device; wherein the first temperature control valve is closed when the outlet temperature of the heat exchange medium flow channel reaches a first preset value, the second temperature control valve is opened when the outlet temperature of the heat exchange medium flow channel reaches a second preset value, and the second preset value is larger than the first preset value. The working temperature of the gate valve can be kept within a set range.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature flue valves, and in particular to a liquid-cooled high-temperature flue gate valve. Background Art

[0002] High temperature flue valves are special valves used to control the flow of high temperature flue gas or gas. They are mainly used in industrial and commercial facilities, such as boiler rooms, thermal power plants (to regulate the high temperature flue gas generated during power generation and optimize the combustion process), metallurgical plants and other high temperature process environments. They play the role of regulating and controlling the airflow in the flue to ensure the normal operation of the equipment. High temperature flue valves need to withstand high temperature flue gas, and their design temperature range can reach 300°C to 1000°C or higher (such as 1350°C). Common types of high temperature flue valves are: Stop valve, used to completely close or open the flue and control the airflow; Gate valve, suitable for large-diameter and high-temperature flues, used to adjust the gas flow; Butterfly valve, suitable for applications requiring fast switching, with fast response time and low pressure loss; Ball valves are suitable for situations where reliable sealing is required and control the air flow by the rotation of the ball.

[0003] Among them, the existing high-temperature flue gate valve includes a flue valve body and a flue valve plate arranged in the flue valve body. The flue valve plate can be moved under the drive of a driving mechanism to achieve opening and closing and flow regulation.

[0004] The inventors have found that since the flue valve body and the flue valve plate are usually made of high-temperature resistant materials with poor thermal conductivity, when the high-temperature flue gate valve is in the open state, only the lower part of the flue valve plate is in direct contact with the flue gas, and the rest of the flue valve body is located outside the flue valve body and has a lower temperature. When the high-temperature flue gate valve switches from the open state to the closed state and the solar term state, the flue valve plate moves quickly into the high-temperature flue gas, causing the flue valve plate to move quickly from a state slightly above normal temperature to a high-temperature environment, causing the flue valve plate to heat up (the temperature difference between the surface and the inside is too large), which can easily cause the flue valve plate to crack and the heat-resistant material to fall off, resulting in a short service life of the high-temperature flue gate valve (more than 2 months). Summary of the invention

[0005] In view of the technical problems that the existing high-temperature flue gate valve is prone to cracking of the flue valve plate and falling off of the heat-resistant material when switching from an open state to a closed state and a energy-saving state, the present invention provides a liquid-cooled high-temperature flue gate valve, which can use the heat of the high-temperature flue gas in the flue to preheat the flue valve plate, and quickly cool the flue valve plate when the temperature of the flue valve plate is too high, so that the operating temperature of the gate valve is maintained within a set range, so as to avoid overheating expansion of the flue valve plate and cracking of the hot surface of the flue valve plate, thereby improving the service life of the high-temperature flue gate valve.

[0006] The present invention is achieved through the following technical solutions: The present invention provides a liquid-cooled high-temperature flue gate valve, comprising: a flue valve body, a flue gas flow passage for flue gas circulation is arranged in the middle of the flue valve body; a flue valve plate, the flue valve plate is slidably connected to the flue valve body, a heat exchange medium flow passage is arranged in the flue valve plate, and the size of the effective flow area of ​​the flue gas flow passage can be controlled by moving the flue valve plate relative to the flue valve body; a first medium reservoir, the outlet of the first medium reservoir is connected to the inlet of the heat exchange medium flow passage through a first temperature control valve, and in a working state, the first medium reservoir is arranged in the flue; a first circulating pump, the first circulating pump A circulation pump is connected between the outlet of the heat exchange medium flow channel and the inlet of the first medium reservoir; a second medium reservoir, the outlet of the second medium reservoir is connected to the inlet of the heat exchange medium flow channel through a second temperature control valve; a second circulation pump, the second circulation pump is connected between the outlet of the heat exchange medium flow channel and the inlet of the second medium reservoir; wherein the first temperature control valve is closed when the outlet temperature of the heat exchange medium flow channel reaches a first preset value, and the second temperature control valve is opened when the outlet temperature of the heat exchange medium flow channel reaches a second preset value, and the second preset value is greater than the first preset value.

[0007] The liquid-cooled high-temperature flue gate valve provided by the present invention comprises a flue valve body, a flue valve plate, a first medium reservoir, a first circulation pump, a second medium reservoir and a second circulation pump. A heat exchange medium flow channel is arranged in the flue valve plate. The outlet of the first medium reservoir is connected to the inlet of the heat exchange medium flow channel through a first temperature control valve. The first circulation pump is connected between the outlet of the heat exchange medium flow channel and the inlet of the first medium reservoir. Meanwhile, the outlet of the second medium reservoir is connected to the inlet of the heat exchange medium flow channel through a second temperature control valve. The second circulation pump is connected between the outlet of the heat exchange medium flow channel and the inlet of the second medium reservoir.

[0008] When in use, the flue valve body is installed in the high-temperature flue, and the first medium reservoir is located in the flue, and heat exchange medium is injected into the first medium reservoir and the second medium reservoir at the same time. Since the first medium reservoir is located in the flue, the high-temperature flue gas in the flue can exchange heat with the first medium reservoir, thereby heating the heat exchange medium in the first medium reservoir. The heat exchange medium in the first medium reservoir is then driven by the first circulation pump to circulate through the first temperature control valve, the heat exchange medium flow channel and the first medium reservoir. When the heat exchange medium flows through the heat exchange medium flow channel, it exchanges heat with the flue valve plate, thereby preheating the flue valve plate, and avoiding the flue valve plate from being heated when the flue valve plate moves in the high-temperature flue, which may easily cause the flue valve plate to crack and the heat-resistant material to fall off.

[0009] Since the second preset value is greater than the first preset value, as the flue valve plate moves into the high-temperature flue, the high-temperature flue gas directly heats the flue valve plate, or the heat exchange medium in the first medium reservoir continues to heat the flue valve plate, causing the temperature of the heat exchange medium in the heat exchange medium flow channel to rise. When its temperature reaches the first preset value, the first temperature control valve is closed, so that the heat exchange medium in the first medium reservoir stops heating the flue valve plate. As the temperature of the heat exchange medium in the heat exchange medium flow channel continues to rise to the second preset value, the second temperature control valve is opened to circulate the heat exchange medium in the second medium reservoir through the second temperature control valve, the heat exchange medium flow channel and the second medium reservoir through the second circulation pump. When the heat exchange medium in the second medium reservoir flows through the heat exchange medium flow channel, it exchanges heat with the flue valve plate, thereby cooling the flue valve plate to prevent the temperature of the flue valve plate from being too high.

[0010] Therefore, the liquid-cooled high-temperature flue gate valve provided by the present invention can utilize the heat of the high-temperature flue gas in the flue to preheat the flue valve plate, and quickly cool the flue valve plate when the temperature of the flue valve plate is too high, so that the operating temperature of the gate valve is maintained within the set range, so as to avoid overheating expansion of the flue valve plate and cracking of the hot surface of the flue valve plate, thereby improving the service life of the high-temperature flue gate valve.

[0011] Among them, the present invention heats the heat exchange medium of the first medium storage by flue gas, and heats the flue valve plate by the heat exchange medium of the first medium storage, which will not change the flow direction of the flue gas in the flue, and also facilitates controlling the working temperature of the medium heating the flue valve plate.

[0012] Optionally, the flue valve body is provided with a slide groove, which extends from one side of the flue valve body to the other side and intersects with the flue gas flow duct. The flue valve plate is slidably clamped in the slide groove so that the flue valve plate is slidably connected to the flue valve body and ensures that the flue valve plate can control the size of the effective flow area of ​​the flue gas flow duct.

[0013] Optionally, the flue valve plate includes: a plate shell, which is a hollow structure, the plate shell is made of high temperature resistant material, and the inner wall of the plate shell is covered with a heat conduction plate; a heat exchange tube, which is serpentine, and both side walls of the heat exchange tube are in contact with the corresponding heat conduction plate; wherein the heat exchange medium flow channel is the inner cavity of the heat exchange tube, so that the heat exchange medium in the heat exchange medium flow channel can exchange heat with the flue valve plate.

[0014] Optionally, the first medium reservoir is slidably arranged at the air inlet end of the flue valve body, and the side wall of the first medium reservoir is made of heat-conductive material; the first medium reservoir is also adapted to be equipped with a temperature-sensitive pusher, one end of the temperature-sensitive pusher is fixedly connected to the first medium reservoir, and the other end of the temperature-sensitive pusher is fixedly connected to the flue valve body, and the temperature-sensitive pusher can push the first medium reservoir away from the air inlet of the flue valve body according to the medium temperature in the first medium reservoir.

[0015] Therefore, when the first medium reservoir is working, the flue gas directly heats the heat exchange medium therein, and at the same time, the heat exchange medium of the first medium reservoir exchanges heat with the temperature-sensitive pusher in real time. When the temperature of the medium in the first medium reservoir is higher than a preset value, the temperature-sensitive pusher is actuated to push the first medium reservoir away from the air inlet of the flue valve body, so that the first medium reservoir stops exchanging heat with the flue gas and exchanges heat with the gas in the environment, prompting the heat exchange medium in the first medium reservoir to cool down, thereby achieving the purpose of controlling the working temperature of the medium that heats the flue valve plate, so as to avoid the heat exchange medium in the first medium reservoir being too high, which may cause the flue damper to be heated and overheated.

[0016] Optionally, the temperature-sensitive pusher includes: a heat-conducting tube, which is made of heat-conducting material and is installed in the first medium reservoir, and in the working state, the heat-conducting tube is filled with temperature-sensitive medium; an insulating tube, one end of which is fixedly connected to the first medium reservoir, and the end of which is directly opposite to the first medium reservoir is connected to the inner cavity of the heat-conducting tube; a push piston, which is adapted to the inner cavity of the insulating tube; a push rod, one end of which is fixedly connected to the push piston, and the other end of which is fixedly connected to the flue valve body, so as to ensure that the temperature-sensitive pusher can control the position of the first medium reservoir in real time according to the medium temperature in the first medium reservoir. After the temperature of the heat exchange medium in the first medium reservoir decreases, the first medium reservoir is reset under the action of its own gravity.

[0017] Optionally, the side of the first medium reservoir facing the insulation cylinder is covered with an insulation layer to prevent high-temperature flue gas from still being able to efficiently exchange heat with the first medium reservoir after the first medium reservoir is pushed away from the air inlet of the flue valve body, thereby ensuring that the heat exchange medium in the first medium reservoir can be quickly cooled down after the first medium reservoir is pushed away from the air inlet of the flue valve body.

[0018] Optionally, the first temperature control valve includes: a first switch valve body, the first switch valve body is provided with a heating medium flow channel; a first switch valve core, the first switch valve core is adapted to the heating medium flow channel, and the first switch valve core moves along its own length direction to control the on-off of the heating medium flow channel; a first temperature sensing driver, the first temperature sensing driver is transmission-connected to the first switch valve core, and the temperature sensing component of the first temperature sensing driver is located at the outlet end of the heat exchange medium flow channel; a first reset spring, the first reset spring is used to drive the first switch valve core to reset, so as to ensure that the first temperature control valve is closed when the outlet temperature of the heat exchange medium flow channel reaches a first preset value.

[0019] Optionally, the first temperature-sensing driver includes: a first temperature-sensing cylinder, which is arranged at the outlet end of the heat exchange medium flow channel; a first temperature-sensing piston, which is adapted to the first temperature-sensing cylinder and can move axially along the first temperature-sensing cylinder, and in a working state, the first temperature-sensing piston and the end of the first temperature-sensing cylinder away from the first switch valve core are filled with a temperature-sensitive working medium; a first piston rod, wherein both ends of the first piston rod are fixedly connected to the corresponding first temperature-sensing piston and the first switch valve core respectively, so as to ensure that the first temperature-sensing driver can control the action of the first switch valve core in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel.

[0020] Optionally, the second temperature control valve includes: a second switch valve body, the second switch valve body is provided with a cooling medium flow channel; a second switch valve core, the second switch valve core is adapted to the cooling medium flow channel, and the second switch valve core moves along its own length direction to control the on-off of the cooling medium flow channel; a second temperature-sensitive driver, the second temperature-sensitive driver is transmission-connected to the second switch valve core, and the temperature-sensing component of the second temperature-sensitive driver is located at the outlet end of the heat exchange medium flow channel; a second return spring, the second return spring is used to drive the second switch valve core to reset, so as to ensure that the second temperature control valve opens when the outlet temperature of the heat exchange medium flow channel reaches a second preset value.

[0021] Optionally, the second temperature-sensing driver includes: a second temperature-sensing cylinder, which is arranged at the outlet end of the heat exchange medium flow channel; a second temperature-sensing piston, which is adapted to the second temperature-sensing cylinder, and the second temperature-sensing piston can move axially along the second temperature-sensing cylinder, and in a working state, the second temperature-sensing piston and the end of the second temperature-sensing cylinder away from the second switch valve core are filled with a temperature-sensitive working medium; a second piston rod, wherein both ends of the second piston rod are fixedly connected to the corresponding second temperature-sensing piston and the second switch valve core respectively, so as to ensure that the second temperature-sensing driver can control the action of the second switch valve core in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The liquid-cooled high-temperature flue gate valve provided by the present invention comprises a flue valve body, a flue valve plate, a first medium reservoir, a first circulation pump, a second medium reservoir and a second circulation pump. A heat exchange medium flow channel is arranged in the flue valve plate. The outlet of the first medium reservoir is connected to the inlet of the heat exchange medium flow channel through a first temperature control valve. The first circulation pump is connected between the outlet of the heat exchange medium flow channel and the inlet of the first medium reservoir. Meanwhile, the outlet of the second medium reservoir is connected to the inlet of the heat exchange medium flow channel through a second temperature control valve. The second circulation pump is connected between the outlet of the heat exchange medium flow channel and the inlet of the second medium reservoir. The first medium reservoir is located in the flue. The high-temperature flue gas in the flue can exchange heat with the first medium reservoir, thereby heating the heat exchange medium in the first medium reservoir. The heat exchange medium in the first medium reservoir is then driven by the first circulation pump to circulate through the first temperature control valve, the heat exchange medium flow channel and the first medium reservoir, thereby preheating the flue valve plate to avoid the flue valve plate from being heated when the flue valve plate moves in the high-temperature flue, which may easily cause the flue valve plate to crack and the heat-resistant material to fall off.

[0023] 2. The liquid-cooled high-temperature flue gate valve provided by the present invention has a first temperature control valve that closes when the temperature of the heat exchange medium in the heat exchange medium flow channel reaches a first preset value, so that the heat exchange medium in the first medium reservoir stops heating the flue valve plate. As the temperature of the heat exchange medium in the heat exchange medium flow channel continues to rise to a second preset value, the second temperature control valve opens to circulate the heat exchange medium in the second medium reservoir through the second temperature control valve, the heat exchange medium flow channel and the second medium reservoir through a second circulation pump. When the heat exchange medium in the second medium reservoir flows through the heat exchange medium flow channel, it exchanges heat with the flue valve plate, thereby cooling the flue valve plate to avoid excessive temperature of the flue valve plate, so that the operating temperature of the gate valve is maintained within a set range, thereby increasing the service life of the high-temperature flue gate valve.

[0024] 3. The liquid-cooled high-temperature flue gate valve provided by the present invention heats the heat exchange medium of the first medium storage device by flue gas, and heats the flue valve plate by the heat exchange medium of the first medium storage device, which will not change the flow direction of the flue gas in the flue, and is also convenient for controlling the working temperature of the medium for heating the flue valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] In the attached picture: Figure 1 This is a schematic structural diagram of a liquid-cooled high-temperature flue gate valve body according to an embodiment of the present invention; Figure 2 This is a pipeline principle diagram of a liquid-cooled high-temperature flue gate valve according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a first medium storage device according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a first temperature control valve according to an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the second temperature control valve according to an embodiment of the present invention.

[0027] Marks and corresponding parts names in the attached drawings: 100-flue valve body, 110-flue gas flow channel, 120-chute; 200- flue valve plate, 210- plate shell, 211- heat transfer plate, 220- heat exchange tube, 221- heat exchange medium flow channel; 300-first medium storage, 310-temperature sensing pusher, 311-heat-conducting cylinder, 312-insulating cylinder, 313-push piston, 314-push rod, 315-insulating layer; 400 - first temperature control valve, 410 - first switch valve body, 411 - heating medium flow channel, 420 - first switch valve core, 430 - first temperature sensing driver, 431 - first temperature sensing cylinder, 432 - first temperature sensing piston, 433 - first piston rod, 440 - first return spring; 500-first circulation pump; 600 - second medium storage; 700 - second temperature control valve, 710 - second switch valve body, 711 - cooling medium flow channel, 720 - second switch valve core, 730 - second temperature sensing driver, 731 - second temperature sensing cylinder, 732 - second temperature sensing piston, 733 - second piston rod, 740 - second return spring; 800 - Second circulation pump. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the embodiments of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or is the orientation or positional relationship in which the device of the application is usually placed when in use, or is the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. At the same time, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example

[0031] Combination Figure 1 and Figure 2 The present embodiment provides a liquid-cooled high-temperature flue gate valve, a flue valve body 100, a flue gas flow passage 110 for flue gas circulation is arranged in the middle of the flue valve body 100; a flue valve plate 200, the flue valve plate 200 is slidably connected to the flue valve body 100, a heat exchange medium flow passage 221 is arranged in the flue valve plate 200, and the size of the effective flow area of ​​the flue gas flow passage 110 can be controlled by moving the flue valve plate 200 relative to the flue valve body 100; a first medium reservoir 300, the outlet of the first medium reservoir 300 is connected to the inlet of the heat exchange medium flow passage 221 through a first temperature control valve 400, and in the working state, the first medium reservoir 300 is arranged in the flue; a first circulating pump 500, the The first circulation pump 500 is connected between the outlet of the heat exchange medium flow channel 221 and the inlet of the first medium storage 300; the second medium storage 600, the outlet of the second medium storage 600 is connected to the inlet of the heat exchange medium flow channel 221 through the second temperature control valve 700; the second circulation pump 800, the second circulation pump 800 is connected between the outlet of the heat exchange medium flow channel 221 and the inlet of the second medium storage 600; wherein the first temperature control valve 400 is closed when the outlet temperature of the heat exchange medium flow channel 221 reaches a first preset value, and the second temperature control valve 700 is opened when the outlet temperature of the heat exchange medium flow channel 221 reaches a second preset value, and the second preset value is greater than the first preset value.

[0032] It can be understood that the flue valve body 100 is provided with a slide groove 120, the slide groove 120 extends from one side of the flue valve body 100 to the other side, and the slide groove 120 intersects with the flue gas flow passage 110, and the flue valve plate 200 is slidably clamped in the slide groove 120, so that the flue valve plate 200 is slidably connected with the flue valve body 100, and ensures that the flue valve plate 200 can control the size of the effective flow area of ​​the flue gas flow passage 110. The movement of the valve plate can be driven by a linear drive mechanism installed on the flue valve body 100, such as a screw slider mechanism, a pneumatic or hydraulic cylinder, etc., or it can be achieved by a hoisting mechanism, such as a winch cable mechanism, etc.

[0033] Recombination Figure 1 , the flue valve plate 200 includes: a plate shell 210, the plate shell 210 is a hollow structure, the plate shell 210 is a high temperature resistant material (such as fire bricks, graphite, ceramics, etc.), and the inner wall of the plate shell 210 is covered with a heat conducting plate 211; a heat exchange tube 220, the heat exchange tube 220 is serpentine, and the two side walls of the heat exchange tube 220 are in contact with the corresponding heat conducting plate 211; wherein the heat exchange medium flow channel 221 is the inner cavity of the heat exchange tube 220, so that the heat exchange medium in the heat exchange medium flow channel 221 can exchange heat with the flue valve plate 200. It should be understood that the heat conducting plate 211 and the heat exchange tube 220 are usually made of metal, generally copper or copper alloy. As for the heat exchange tube 220, it only needs to be bent and set in the plate shell 210, and can be a serpentine, U-shaped or other shape that can increase the contact area between the heat pipe and the heat conducting plate 211.

[0034] Combination Figure 1 and 3 The first medium reservoir 300 is slidably arranged at the air inlet end of the flue valve body 100, and the side wall of the first medium reservoir 300 is made of heat-conductive material (usually made of metal, generally copper or copper alloy); the first medium reservoir 300 is also adapted to be equipped with a temperature-sensitive pusher 310, one end of the temperature-sensitive pusher 310 is fixedly connected to the first medium reservoir 300, and the other end of the temperature-sensitive pusher 310 is fixedly connected to the flue valve body 100, and the temperature-sensitive pusher 310 can push the first medium reservoir 300 away from the air inlet of the flue valve body 100 according to the medium temperature in the first medium reservoir 300.

[0035] Therefore, when the first medium storage 300 is working, the flue gas directly heats the heat exchange medium therein, and at the same time, the heat exchange medium of the first medium storage 300 performs heat exchange with the temperature-sensing pusher 310 in real time. When the temperature of the medium in the first medium storage 300 is higher than a preset value, the temperature-sensing pusher 310 is actuated to push the first medium storage 300 away from the air inlet of the flue valve body 100, so that the first medium storage 300 stops performing heat exchange with the flue gas and performs heat exchange with the gas in the environment, thereby causing the heat exchange medium in the first medium storage 300 to cool down, thereby achieving the purpose of controlling the working temperature of the medium that heats the flue valve plate 200, so as to avoid the heat exchange medium in the first medium storage 300 from being too high, thereby causing the flue damper to be heated and overheated.

[0036] Specifically, the temperature-sensitive pusher 310 includes: a heat-conducting tube 311, which is made of a heat-conducting material (usually made of metal, generally copper or copper alloy), and is installed in the first medium reservoir 300. In the working state, the heat-conducting tube 311 is filled with a temperature-sensitive medium (temperature-sensitive medium); an insulating tube 312, which is usually made of metal, and the surface of the metal cylinder is covered with a heat-insulating material, such as heat-insulating mineral wool, ceramic fiber, heat-insulating coating, etc., or a double-layer vacuum insulation structure, etc., and one end of the heat-insulating tube 312 is fixed to the first medium reservoir 300. The heat-insulating cylinder 312 is fixedly connected, and one end of the heat-insulating cylinder 312 facing the first medium reservoir 300 is communicated with the inner cavity of the heat-conducting cylinder 311; a push piston 313, and the push piston 313 is adapted to the inner cavity of the heat-insulating cylinder 312; a push rod 314, one end of the push rod 314 is fixedly connected to the push piston 313, and the other end of the push rod 314 is fixedly connected to the flue valve body 100. The push rod 314 is also made by covering the heat-insulating material on the outside of the metal structure. In order to ensure that the heat-insulating cylinder 312 can slide smoothly relative to the push rod 314, in this embodiment, the push rod 314 is covered with ceramic fiber.

[0037] Thus, the heat-conducting cylinder 311 can perform heat exchange with the heat exchange medium in the first medium reservoir 300 in real time, and transfer heat to the temperature-sensitive medium therein, and the temperature-sensitive medium enters the heat-insulating cylinder 312 after expansion, thereby driving the first medium reservoir 300 body to move upward relative to the push piston 313, thereby pushing the first medium reservoir 300 away from the air inlet of the flue valve body 100, so as to ensure that the temperature-sensitive pusher 310 can control the position of the first medium reservoir 300 in real time according to the medium temperature in the first medium reservoir 300. Among them, after the temperature of the heat exchange medium in the first medium reservoir 300 decreases, the temperature-sensitive medium contracts, and the first medium reservoir 300 is reset under the action of its own gravity.

[0038] It should be understood that the side of the first medium reservoir 300 facing the insulation tube 312 is covered with an insulation layer 315 (insulation material layer) to prevent the high-temperature flue gas from still being able to efficiently exchange heat with the first medium reservoir 300 after the first medium reservoir 300 is pushed away from the air inlet of the flue valve body 100, thereby ensuring that the heat exchange medium therein can be quickly cooled down after the first medium reservoir 300 is pushed away from the air inlet of the flue valve body 100.

[0039] Combination Figure 4 The first temperature control valve 400 includes: a first switch valve body 410, the first switch valve body 410 is provided with a heating medium flow channel 411; a first switch valve core 420, the first switch valve core 420 is adapted to the heating medium flow channel 411, and the first switch valve core 420 moves along its own length direction to control the on-off of the heating medium flow channel 411; a first temperature sensing driver 430, the first temperature sensing driver 430 is transmission-connected to the first switch valve core 420, and the temperature sensing component of the first temperature sensing driver 430 is located at the outlet end of the heat exchange medium flow channel 221; a first reset spring 440, the first reset spring 440 is used to drive the first switch valve core 420 to reset, so as to ensure that the first temperature control valve 400 is closed when the outlet temperature of the heat exchange medium flow channel 221 reaches a first preset value.

[0040] It is known that a through hole is provided on the first switch valve core 420. When the outlet temperature of the heat exchange medium flow channel 221 does not reach the first preset value, the through hole on the first switch valve core 420 communicates with the heating medium flow channel 411, so that the heat exchange medium of the first medium storage 300 can flow from the first temperature control valve 400. When the outlet temperature of the heat exchange medium flow channel 221 reaches the first preset value, the first temperature sensing driver 430 drives the first switch valve core 420 to move to a position where its through hole is disconnected from the heating medium flow channel 411. At this time, the first temperature control valve 400 is closed and the first return spring 440 stores energy. When the outlet temperature of the heat exchange medium flow channel 221 drops below the first preset value, the first switch valve core 420 is driven to return to a position where its through hole communicates with the heating medium flow channel 411 under the return force of the first return spring 440, so that the first temperature control valve 400 is opened.

[0041] It should be noted that the first temperature-sensing driver 430 includes: a first temperature-sensing cylinder 431, which is arranged at the outlet end of the heat exchange medium flow channel 221; a first temperature-sensing piston 432, which is adapted to the first temperature-sensing cylinder 431, and the first temperature-sensing piston 432 can move along the axial direction of the first temperature-sensing cylinder 431. In the working state, the first temperature-sensing piston 432 and the first temperature-sensing cylinder 431 are filled with a temperature-sensitive working medium at one end away from the first switch valve core 420; a first piston rod 433, and the two ends of the first piston rod 433 are fixedly connected to the corresponding first temperature-sensing piston 432 and the first switch valve core 420, respectively, to ensure that the first temperature-sensing driver 430 can control the action of the first switch valve core 420 in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel 221.

[0042] Specifically, when there is medium flowing at the outlet of the heat exchange medium flow channel 221, the first temperature sensing cylinder 431 exchanges heat with the heat exchange medium in real time, and transfers heat to the temperature-sensitive working medium therein, causing the temperature-sensitive working medium to expand, thereby pushing the first temperature sensing piston 432 to move, and then pushing the first switch valve core 420 to move through the first piston rod 433, so that the cross-sectional area of ​​the through hole on the first switch valve core 420 that communicates with the heating medium flow channel 411 is gradually reduced, and at the same time, the first return spring 440 is compressed, thereby controlling the action of the first switch valve core 420 in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel 221.

[0043] Combination Figure 5 The second temperature control valve 700 includes: a second switch valve body 710, the second switch valve body 710 is provided with a cooling medium flow channel 711; a second switch valve core 720, the second switch valve core 720 is adapted to the cooling medium flow channel 711, and the second switch valve core 720 moves along its own length direction to control the opening and closing of the cooling medium flow channel 711; a second temperature-sensing driver 730, the second temperature-sensing driver 730 is transmission-connected to the second switch valve core 720, and the temperature-sensing component of the second temperature-sensing driver 730 is located at the outlet end of the heat exchange medium flow channel 221; a second reset spring 740, the second reset spring 740 is used to drive the second switch valve core 720 to reset, so as to ensure that the second temperature control valve 700 is opened when the outlet temperature of the heat exchange medium flow channel 221 reaches a second preset value.

[0044] It is known that a through hole is provided on the second switch valve core 720. When the outlet temperature of the heat exchange medium flow channel 221 does not reach the second preset value, the through hole on the second switch valve core 720 is disconnected from the cooling medium flow channel 711, so that the heat exchange medium of the second medium storage 600 cannot flow from the second temperature control valve 700. When the outlet temperature of the heat exchange medium flow channel 221 reaches the second preset value, the second temperature sensing driver 730 drives the second switch valve core 720 to move to a position where its through hole is connected to the heating medium flow channel 411. At this time, the second temperature control valve 700 is opened and the second reset spring 740 is energized. When the outlet temperature of the heat exchange medium flow channel 221 drops below the second preset value, the second switch valve core 720 is driven to reset to a position where its through hole is disconnected from the heating medium flow channel 411 under the reset force of the second reset spring 740, so that the second temperature control valve 700 is closed.

[0045] Similarly, the second temperature-sensing driver 730 includes: a second temperature-sensing cylinder 731, which is arranged at the outlet end of the heat exchange medium flow channel 221; a second temperature-sensing piston 732, which is adapted to the second temperature-sensing cylinder 731, and the second temperature-sensing piston 732 can move axially along the second temperature-sensing cylinder 731. In the working state, the second temperature-sensing piston 732 and the second temperature-sensing cylinder 731 are filled with a temperature-sensitive working medium at one end away from the second switch valve core 720; a second piston rod 733, and the two ends of the second piston rod 733 are fixedly connected to the corresponding second temperature-sensing piston 732 and the second switch valve core 720, respectively, to ensure that the second temperature-sensing driver 730 can control the action of the second switch valve core 720 in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel 221.

[0046] Specifically, when there is medium flowing at the outlet of the heat exchange medium flow channel 221, the second temperature-sensing cylinder 731 exchanges heat with the heat exchange medium in real time, and transfers heat to the temperature-sensitive working medium therein, causing the temperature-sensitive working medium to expand, thereby pushing the second temperature-sensing piston 732 to move, and then pushing the second switch valve core 720 to move through the second piston rod 733, and finally making the through hole on the second switch valve core 720 communicate with the cooling medium flow channel 711, and at the same time compressing the first return spring 440, and then controlling the action of the second switch valve core 720 in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel 221.

[0047] It is understandable that each temperature sensing cylinder is made of heat-conducting material and is usually made of metal, generally copper or copper alloy. The first circulation pump 500 and the second circulation pump 800 are usually high-temperature medium pumps such as centrifugal pumps and gear pumps that can withstand high-temperature media. The preset value of each temperature is determined according to actual use requirements and working conditions.

[0048] In summary, the liquid-cooled high-temperature flue gate valve provided in this embodiment includes a flue valve body 100, a flue valve plate 200, a first medium reservoir 300, a first circulating pump 500, a second medium reservoir 600 and a second circulating pump 800. A heat exchange medium flow channel 221 is arranged in the flue valve plate 200. The outlet of the first medium reservoir 300 is connected to the inlet of the heat exchange medium flow channel 221 through the first temperature control valve 400. The first circulating pump 500 is connected between the outlet of the heat exchange medium flow channel 221 and the inlet of the first medium reservoir 300. At the same time, the outlet of the second medium reservoir 600 is connected to the inlet of the heat exchange medium flow channel 221 through the second temperature control valve 700. The second circulating pump 800 is connected between the outlet of the heat exchange medium flow channel 221 and the inlet of the second medium reservoir 600.

[0049] When in use, the flue valve body 100 is installed in the high-temperature flue, and the first medium reservoir 300 is located in the flue. At the same time, heat exchange medium (usually cooling oil) is injected into the first medium reservoir 300 and the second medium reservoir 600, and temperature-sensitive working fluid (usually liquid with a large thermal expansion coefficient such as ammonia water, kerosene, liquid hydrocarbon, etc.) is injected into the first temperature sensing cylinder 431 and the second temperature sensing cylinder 731. Since the first medium reservoir 300 is located in the flue, the high-temperature flue gas in the flue can exchange heat with the first medium reservoir 300, thereby heating the heat exchange medium in the first medium reservoir 300. The first circulating pump 500 then drives the heat exchange medium in the first medium reservoir 300 to circulate through the first temperature control valve 400, the heat exchange medium flow channel 221 and the first medium reservoir 300. When the heat exchange medium flows through the heat exchange medium flow channel 221, it exchanges heat with the flue valve plate 200, thereby preheating the flue valve plate 200 to avoid the flue valve plate 200 from being heated when moving in the high-temperature flue, which may easily cause the flue valve plate 200 to crack and the heat-resistant material to fall off.

[0050] At the same time, the heat exchange medium of the first medium reservoir 300 exchanges heat with the temperature-sensitive pusher 310 in real time through the heat-conducting tube 311, and the temperature-sensitive medium in the heat-conducting tube 311 expands and enters the heat-insulating tube 312. When the temperature of the medium in the first medium reservoir 300 is higher than a preset value, the temperature-sensitive pusher 310 is actuated to push the first medium reservoir 300 away from the air inlet of the flue valve body 100, so that the first medium reservoir 300 stops exchanging heat with the flue gas and exchanges heat with the gas in the environment, so as to cool the heat exchange medium in the first medium reservoir 300, thereby achieving the purpose of controlling the working temperature of the medium heating the flue valve plate 200, so as to avoid the heat exchange medium in the first medium reservoir 300 being too high, which may cause the flue damper to be heated and overheated.

[0051] Furthermore, the first temperature sensing driver 430 controls the first switch valve core 420 to operate in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel 221, and the second temperature sensing driver 730 controls the second switch valve core 720 to operate in real time according to the medium temperature at the outlet end of the heat exchange medium flow channel 221. As the flue valve plate 200 moves into the high-temperature flue, the high-temperature flue gas directly heats the flue valve plate 200, or the heat exchange medium in the first medium storage 300 continuously heats the flue valve plate 200, resulting in an increase in the temperature of the heat exchange medium in the heat exchange medium flow channel 221.

[0052] When its temperature reaches the first preset value, the first temperature control valve 400 is closed, so that the heat exchange medium in the first medium storage 300 stops heating the flue valve plate 200. As the temperature of the heat exchange medium in the heat exchange medium flow channel 221 continues to rise to the second preset value, the second temperature control valve 700 is opened to circulate the heat exchange medium in the second medium storage 600 through the second temperature control valve 700, the heat exchange medium flow channel 221 and the second medium storage 600 through the second circulation pump 800. When the heat exchange medium in the second medium storage 600 flows through the heat exchange medium flow channel 221, it exchanges heat with the flue valve plate 200, thereby cooling the flue valve plate 200 to prevent the temperature of the flue valve plate 200 from being too high.

[0053] In summary, the liquid-cooled high-temperature flue gate valve provided in this embodiment can utilize the heat of the high-temperature flue gas in the flue to preheat the flue valve plate 200, and quickly cool the flue valve plate 200 when the temperature is too high, so that the operating temperature of the gate valve is maintained within the set range, so as to avoid overheating expansion of the flue valve plate 200 and avoid cracking of the hot surface of the flue valve plate 200, thereby improving the service life of the high-temperature flue gate valve.

[0054] Among them, this embodiment heats the heat exchange medium of the first medium storage 300 through the flue gas, and when the heat exchange medium of the first medium storage 300 heats the flue valve plate 200, the flow direction of the flue gas in the flue will not be changed, and it is also convenient to control the working temperature of the medium heating the flue valve plate 200. There is no need to set up an additional active heating component, no additional energy consumption, simple structure, and all the action parts are mechanical parts, with high reliability and timely response.

[0055] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid-cooled high-temperature flue gate valve, characterized in that: include: A flue valve body (100), wherein a flue gas flow passage (110) for flue gas to flow is provided in the middle of the flue valve body (100); a flue valve plate (200), the flue valve plate (200) being slidably connected to the flue valve body (100), a heat exchange medium flow channel (221) being provided in the flue valve plate (200), and the size of the effective flow area of ​​the flue gas flow channel (110) being controllable by the flue valve plate (200) moving relative to the flue valve body (100); a first medium storage device (300), wherein an outlet of the first medium storage device (300) is connected to an inlet of the heat exchange medium flow channel (221) via a first temperature control valve (400); in a working state, the first medium storage device (300) is arranged in the flue; A first circulation pump (500), the first circulation pump (500) being connected between an outlet of the heat exchange medium flow channel (221) and an inlet of the first medium storage tank (300); A second medium storage device (600), wherein an outlet of the second medium storage device (600) is connected to an inlet of the heat exchange medium flow channel (221) via a second temperature control valve (700); a second circulation pump (800), the second circulation pump (800) being connected between an outlet of the heat exchange medium flow channel (221) and an inlet of the second medium storage tank (600); The first temperature control valve (400) is closed when the outlet temperature of the heat exchange medium flow channel (221) reaches a first preset value, and the second temperature control valve (700) is opened when the outlet temperature of the heat exchange medium flow channel (221) reaches a second preset value, and the second preset value is greater than the first preset value.

2. The liquid-cooled high-temperature flue gate valve according to claim 1, characterized in that: The flue valve body (100) is provided with a slide groove (120), the slide groove (120) extending from one side of the flue valve body (100) to the other side, and the slide groove (120) intersects with the flue gas flow channel (110), and the flue valve plate (200) is slidably mounted in the slide groove (120).

3. The liquid-cooled high-temperature flue gate valve according to claim 1, characterized in that: The flue valve plate (200) comprises: A plate shell (210), the plate shell (210) being a hollow structure, the plate shell (210) being made of a high temperature resistant material, and the inner side wall of the plate shell (210) being covered with a heat conducting plate (211); A heat exchange tube (220), the heat exchange tube (220) being serpentine-shaped, and both side walls of the heat exchange tube (220) being in contact with the corresponding heat conduction plate (211); Wherein, the heat exchange medium flow channel (221) is the inner cavity of the heat exchange tube (220).

4. The liquid-cooled high-temperature flue gate valve according to claim 1, characterized in that: The first medium storage (300) is slidably arranged at the air inlet end of the flue valve body (100), and the side wall of the first medium storage (300) is made of a heat-conducting material; The first medium reservoir (300) is also equipped with a temperature-sensitive pusher (310), one end of the temperature-sensitive pusher (310) is fixedly connected to the first medium reservoir (300), and the other end of the temperature-sensitive pusher (310) is fixedly connected to the flue valve body (100), and the temperature-sensitive pusher (310) can push the first medium reservoir (300) away from the air inlet of the flue valve body (100) according to the temperature of the medium in the first medium reservoir (300).

5. The liquid-cooled high-temperature flue gate valve according to claim 4, characterized in that: The temperature-sensing pusher (310) comprises: A heat-conducting tube (311), the heat-conducting tube (311) is made of a heat-conducting material, the heat-conducting tube (311) is installed in the first medium storage (300), and in a working state, the heat-conducting tube (311) is filled with a temperature-sensitive working medium; An insulating cylinder (312), one end of the insulating cylinder (312) being fixedly connected to the first medium reservoir (300), and one end of the insulating cylinder (312) facing the first medium reservoir (300) being in communication with the inner cavity of the heat-conducting cylinder (311); A push piston (313), the push piston (313) being adapted to the inner cavity of the thermal insulation cylinder (312); A push rod (314), one end of the push rod (314) is fixedly connected to the push piston (313), and the other end of the push rod (314) is fixedly connected to the flue valve body (100).

6. The liquid-cooled high-temperature flue gate valve according to claim 5, characterized in that: A side of the first medium storage (300) facing the thermal insulation cylinder (312) is covered with a thermal insulation layer (315).

7. The liquid-cooled high-temperature flue gate valve according to claim 1, characterized in that: The first temperature control valve (400) comprises: A first switch valve body (410), wherein the first switch valve body (410) is provided with a heating medium flow channel (411); a first switch valve core (420), the first switch valve core (420) being adapted to the heating medium flow channel (411), and capable of controlling the on / off state of the heating medium flow channel (411) by moving the first switch valve core (420) along its own length direction; A first temperature-sensing driver (430), the first temperature-sensing driver (430) being transmission-connected to the first switch valve core (420), and a temperature-sensing component of the first temperature-sensing driver (430) being located at an outlet end of the heat exchange medium flow channel (221); A first return spring (440), wherein the first return spring (440) is used to drive the first switch valve core (420) to return to its original position.

8. The liquid-cooled high-temperature flue gate valve according to claim 7, characterized in that: The first temperature sensing driver (430) comprises: A first temperature sensing cylinder (431), the first temperature sensing cylinder (431) being arranged at an outlet end of the heat exchange medium flow channel (221); a first temperature-sensitive piston (432), the first temperature-sensitive piston (432) being adapted to the first temperature-sensitive cylinder (431), and the first temperature-sensitive piston (432) being able to move along the axial direction of the first temperature-sensitive cylinder (431), and in a working state, a temperature-sensitive working medium is contained at one end of the first temperature-sensitive piston (432) and the first temperature-sensitive cylinder (431) away from the first switch valve core (420); A first piston rod (433), wherein two ends of the first piston rod (433) are respectively fixedly connected to the corresponding first temperature-sensing piston (432) and the first switch valve core (420).

9. The liquid-cooled high-temperature flue gate valve according to any one of claims 1 to 8, characterized in that: The second temperature control valve (700) comprises: A second switch valve body (710), wherein the second switch valve body (710) is provided with a cooling medium flow channel (711); a second switch valve core (720), the second switch valve core (720) being adapted to the cooling medium flow channel (711), and capable of controlling the opening and closing of the cooling medium flow channel (711) by moving the second switch valve core (720) along its own length direction; a second temperature-sensing driver (730), the second temperature-sensing driver (730) being transmission-connected to the second switch valve core (720), and a temperature-sensing component of the second temperature-sensing driver (730) being located at an outlet end of the heat exchange medium flow channel (221); A second return spring (740), the second return spring (740) is used to drive the second switch valve core (720) to return to its original position.

10. The liquid-cooled high-temperature flue gate valve according to claim 9, characterized in that: The second temperature sensing driver (730) comprises: a second temperature-sensing cylinder (731), the second temperature-sensing cylinder (731) being arranged at an outlet end of the heat exchange medium flow channel (221); a second temperature-sensitive piston (732), the second temperature-sensitive piston (732) being adapted to the second temperature-sensitive cylinder (731), and the second temperature-sensitive piston (732) being able to move along the axial direction of the second temperature-sensitive cylinder (731), and in a working state, a temperature-sensitive working medium is contained at one end of the second temperature-sensitive piston (732) and the second temperature-sensitive cylinder (731) away from the second switch valve core (720); A second piston rod (733), wherein two ends of the second piston rod (733) are respectively fixedly connected to the corresponding second temperature-sensing piston (732) and the second switch valve core (720).

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