CN215861816U - High-temperature flue gas gate valve plate and high-temperature flue gas gate valve - Google Patents

Abstract

The embodiment of the utility model provides a high-temperature flue gas gate valve plate and a high-temperature flue gas gate valve, wherein the high-temperature flue gas gate valve plate comprises: the double-layer plate body is provided with an interlayer; the cooling water channel is arranged in the interlayer between the double-layer plate bodies and is used for introducing a cooling medium; and the refractory castable is poured outside the double-layer plate body. The high-temperature flue gas gate valve provided by the embodiment of the utility model has a very wide application range, and can be applied to various high-temperature kiln flue gas systems with micro negative pressure. The high-temperature flue gas gate valve can stably operate for a long time under the severe working condition of a high-temperature flue gas pipeline of a kiln, and the valve plate is not broken.

Description

High-temperature flue gas gate valve plate and high-temperature flue gas gate valve

Technical Field

The utility model belongs to a flue gas flow cutting and adjusting device on a kiln flue gas pipeline system, and particularly relates to a high-temperature flue gas gate valve plate and a high-temperature flue gas gate valve.

Background

With the national support and policy inclination for energy-saving and emission-reducing projects of high-energy-consumption enterprises, the high-temperature flue gas conveying and waste heat recovery system of various kilns is constructed, upgraded and modified in large area at present.

The high-temperature flue gas pipeline of the kiln mostly adopts induced draft of an induced draft fan or the suction of a chimney to carry out micro-negative pressure operation, and a high-temperature flue gas valve arranged on the high-temperature flue gas pipeline cuts off or adjusts the flow of flue gas according to the process control requirement. In the existing high-temperature gate valve, a valve plate generally adopts a stainless steel framework, and a refractory castable is poured outside the stainless steel framework.

The stainless steel material with excellent performance can resist 1150 ℃ temperature for a short time and can only reach 900 ℃ for a long time, and the high-temperature smoke at present generally reaches 1200 ℃ and 1350 ℃. In the temperature flue gas environment, the stainless steel skeleton can generate high-temperature creep carbonization damage in a short time (about 3 months). In addition, in order to meet the new kiln process requirements, the flue gas gate valve needs to have a function of adjusting the flow of flue gas, when the flow is adjusted, the lower part of the valve plate is positioned in a high-temperature valve cavity, and the upper part of the valve plate is positioned outside the normal-temperature valve cavity; the high temperature difference (more than or equal to 800 ℃) exists at the internal and external interface of the valve cavity, and the existence of the temperature difference can cause the refractory castable at the corresponding position of the valve plate to generate thermal stress. When the thermal stress is greater than the tensile strength of the refractory castable, the refractory castable and the stainless steel skeleton are fractured and fall off together (the stainless steel bar skeleton generates high-temperature creep and the mechanical property is rapidly attenuated in a high-temperature state), so that the valve plate can be fractured in a short time when being used online and the like. Finally, the production is stopped and the maintenance is stopped outside the plan of the kiln, and the production efficiency is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, an object of the embodiments of the present invention is to provide a high temperature flue gas gate valve plate and a high temperature flue gas gate valve that can operate stably for a long time under the severe working conditions of a high temperature flue gas pipeline without fracture.

The technical scheme adopted by the embodiment of the utility model is that the high-temperature flue gas gate valve plate comprises:

the double-layer plate body is provided with an interlayer;

the cooling water channel is arranged in the interlayer between the double-layer plate bodies and is used for introducing a cooling medium;

and the refractory castable is poured outside the double-layer plate body.

In some embodiments, a spiral partition plate is disposed in the interlayer between the two layers of plate bodies, opposite sides of the spiral partition plate are respectively combined with opposite inner side surfaces of the two layers of plate bodies, and the spiral partition plate and the two layers of plate bodies cooperate to form the spiral cooling water channel.

In some embodiments, the outer part of the double-layer plate body is covered with a heat insulation felt and connected with anchoring nails, and the refractory castable is poured outside the heat insulation felt and is held by the anchoring nails.

In some embodiments, the surface of the refractory castable is provided with an expansion gap; the expansion gaps extend along the longitudinal direction or the transverse direction to form a crossed arrangement.

The utility model also provides a high-temperature flue gas gate valve, which comprises a valve body, a valve plate and a transmission device, and is characterized in that the valve plate is the high-temperature flue gas gate valve plate in any embodiment.

In some embodiments, the outer shell of the valve body is made of carbon steel welding pieces, and a valve cavity is formed in the outer shell; the inner wall of the shell is welded with anchoring nails, a heat insulation felt is arranged, and a refractory castable is poured outside the heat insulation felt; and both sides of the lower part of the valve body are respectively provided with an access hole, and an access blind plate is arranged on the upper cover of the access hole.

In some embodiments, the transmission device comprises a frame, a winch and a pulley block, wherein a cavity for accommodating the valve plate is formed in the frame; the pulley block is respectively arranged on the frame and the valve plate, so that the winch drives the valve plate to move by using a rope bypassing the pulley block so as to cut off or adjust the circulation of high-temperature flue gas;

a louver is arranged on the frame, and the louver blades of the louver are obliquely arranged downwards; or a high-temperature-resistant plate is arranged on the frame to seal the containing cavity.

In some embodiments, the high-temperature flue gas gate valve further includes a controller, a display, an open-position proximity switch, an off-position proximity switch, and a sensing block, the display, the open-position proximity switch, and the off-position proximity switch are respectively electrically connected to the controller, the open-position proximity switch and the off-position proximity switch are both disposed on the frame, the sensing block is disposed on the valve plate, when the valve plate moves to a full open position of the valve, the sensing block triggers the open-position proximity switch, the open-position proximity switch generates a first signal and sends the first signal to the controller, when the valve plate moves to a full off position of the valve, the sensing block triggers the off-position proximity switch, the off-position proximity switch generates a second signal and sends the second signal to the controller, the controller receives the first signal and the second signal and generates a corresponding display signal, and the display receives the display signal sent by the controller, to display the corresponding content.

In some embodiments, an angular displacement sensor is arranged on the winch and electrically connected with the controller, the angular displacement sensor is used for sensing a rotation signal of the winch, the controller receives the rotation signal and generates a corresponding display signal, and the display receives the display signal sent by the controller to display the opening percentage of the valve.

In some embodiments, the upper end of the valve plate is provided with a guide block, and the guide block forms the induction block; the frame comprises vertically arranged section steel, the guide block is positioned in a section steel groove of the vertically arranged section steel, and when the valve plate is lifted, the guide block moves along the section steel groove;

the frame is provided with a safety pin, and when the valve plate moves to a full-open position, the safety pin can be inserted into the bottom of the guide block to position the valve plate;

be equipped with on the frame along the calibrated scale of the linear type that the valve plate direction of motion set up, be equipped with on the valve plate along the perpendicular to the valve plate direction of motion extends to the pointer of calibrated scale to the aperture of instruction valve.

Compared with the prior art, the high-temperature flue gas gate valve plate and the high-temperature flue gas gate valve have the advantages that the high-temperature flue gas gate valve is wide in application range and can be applied to various high-temperature kiln flue gas systems with micro negative pressure. The high-temperature flue gas gate valve can stably operate for a long time under the severe working condition of a high-temperature flue gas pipeline of a kiln, and the valve plate is not broken.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the utility model. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a partial sectional view of a high-temperature flue gas gate valve plate according to an embodiment of the present invention.

Fig. 2 is an enlarged view of fig. 1 taken along line a-a.

Fig. 3 is a front view of a high temperature flue gas gate valve plate of an embodiment of the present invention, with a partial enlargement.

Fig. 4 is a partial sectional view of a high temperature flue gas gate valve according to an embodiment of the present invention.

Fig. 5 is a partial sectional view of a valve body of the high temperature flue gas gate valve according to an embodiment of the present invention.

Fig. 6 is a sectional view of a valve body of the high-temperature flue gas gate valve according to the embodiment of the utility model.

Fig. 7 is an enlarged view of a portion B in fig. 6.

Fig. 8 is a partial structural schematic view of the high-temperature flue gas gate valve according to the embodiment of the utility model.

Fig. 9 is a side view of fig. 8.

Fig. 10 is an enlarged view of a portion C in fig. 8.

Fig. 11 is an enlarged view of a portion D in fig. 8.

Reference numerals:

1-a valve plate; 2-a valve body; 3-a double-layer plate body; 4-cooling water channels; 5-heat insulation felt; 6-anchoring nails; 7-refractory castable; 8-a spiral separator; 9-expansion joint; 10-a water inlet; 11-a water return port; 12-a housing; 13-a valve cavity; 14-overhauling a blind plate; 15-a frame; 16-a winch; 17-a fixed pulley; 18-a movable pulley; 19-a shutter; 20-open proximity switch; 21-off proximity switch; 22-a guide block; 23-a shear pin; 24-a dial; 25-maintenance ladder; 26-rope.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the utility model have been omitted.

As shown in fig. 1 to 3, an embodiment of the utility model provides a high-temperature flue gas gate valve plate, and the valve plate 1 includes a double-layer plate body 3, a cooling water channel 4 and a refractory castable 7, and an interlayer is formed between the double-layer plate body 3. The cooling water channel 4 is arranged in the interlayer between the double-layer plate bodies 3, and a cooling medium is introduced into the cooling water channel 4 and used for cooling the valve plate 1. The refractory castable 7 is poured outside the double-layer plate body 3.

The high-temperature flue gas gate valve plate provided by the embodiment of the utility model adopts a sandwich structure of double-layer plate bodies 3, and a cooling water channel 4 is designed in the sandwich. The double-layer plate body 3 can be made of steel plates which can be stably used for a long time in a water-cooling state, and therefore the service life of the valve plate 1 is prolonged.

In the present embodiment, the type of the cooling medium flowing through the cooling water channel 4 is not limited, and may be selected according to the need.

In some embodiments, with reference to fig. 1, a spiral partition plate 8 is disposed in the interlayer between the double-layer plate bodies 3, opposite sides of the spiral partition plate 8 are respectively combined with opposite inner side surfaces of the double-layer plate bodies 3, and the spiral partition plate 8 and the double-layer plate bodies 3 cooperate to form a spiral cooling water channel 4. This double plate body 3 directly forms the wall of cooling water course 4, makes coolant direct action on double plate body 3, and is higher to double plate body 3's cooling effect, further improves double plate body 3's life. To improve the structural stability and cooling efficiency, the spiral partition 8 is also made of steel plate.

As shown in fig. 2, the exterior of the double-layer plate body 3 is covered with a heat insulation felt 5 and connected with an anchoring nail 6, and a refractory castable material 7 is poured outside the heat insulation felt 5. The anchor studs 6 may be made of special stainless steel. Through set up water-cooling structure in double-deck plate body 3, can make anchor nail 6 use under the water-cooling state for a long time steadily, anchor nail 6's effect prevents that it from droing for grabbing refractory castable 7 firmly, improves life. Meanwhile, the heat insulation felt 5 with extremely low heat conduction coefficient is coated outside the double-layer plate body 3, and the heat insulation felt 5 is used for reducing the temperature rise of cooling circulating water by reducing the heat conduction of flue gas and preventing cooling water from vaporizing.

When the valve plate 1 normally works, the valve plate 1 works in a high-temperature flue gas environment, the refractory castable 7 can generate linear expansion change, and in order to prevent the refractory castable 7 from generating internal stress due to the linear expansion change, as shown in fig. 3, an expansion gap 9 is arranged on the surface of the refractory castable 7. The expansion gap 9 can avoid the generation of internal stress and improve the firmness of the refractory castable 7. The expansion joints 9 may extend in the longitudinal direction or in the transverse direction, the longitudinal expansion joints 9 and the transverse expansion joints 9 intersecting to form a grid-like arrangement.

As shown in fig. 1 and 3, the valve plate 1 is provided with a water inlet 10 and a water return port 11, and when the valve is in a working state, the circulating cooling water enters the valve plate 1 from the water inlet 10 of the valve plate 1, then flows through a spiral water channel formed by welding steel plates in the valve plate 1, and finally flows out from the water return port 11. The water inlet pressure of the cooling water can be 0.3-0.6MPa, and the flow of the cooling water is determined by calculating the working condition parameters such as the specification of a valve, the temperature of a flue gas medium and the like.

The valve plate 1 of the embodiment of the utility model is cooled by circulating cooling water, the double-layer plate body 3 and the anchoring nails 6 on the surface of the valve plate 1 can be stably used for a long time in a water cooling state, and the refractory castable 7 on the outer layer of the valve plate 1 can be firmly caught by the double-layer plate body 3 and the anchoring nails 6 in the valve plate 1 to prevent the valve plate 1 from falling off, so that the valve plate 1 can resist high temperature, the valve plate 1 is not easy to break, the technical problem that the service life of the existing valve is short, the refractory material of the valve plate 1 is broken due to thermal stress generated by rapid temperature change when the flow is regulated is thoroughly solved, and the economic benefit and the social benefit of enterprises are greatly improved.

As shown in fig. 4, an embodiment of the present invention also provides a high temperature flue gas gate valve, where the high temperature flue gas gate valve includes a valve body 2, a valve plate 1, and a transmission device, and the valve plate 1 is the high temperature flue gas gate valve plate in any one of the above embodiments.

As shown in fig. 5 to 7, the housing 12 of the valve body 2 is made of a high-quality carbon steel welded structure, and a valve cavity 13 is formed in the housing 12. In order to ensure that the valve body 2 is stably used under the high-temperature working condition, the inner wall of the shell 12 is welded with the anchoring nail 6 made of special stainless steel, and then the refractory castable 7 is poured. In order to further reduce the temperature of the surface of the valve body 2 and reduce the heat loss, a heat insulating felt 5 having an extremely low thermal conductivity is laid inside the carbon steel welded member of the valve body 2.

When the valve body 2 works, sundries or falling refractory castable 7 are contained in the flue gas pipeline, for the convenience of field maintainers to overhaul and maintain the valve, as shown in fig. 4 and 5, overhaul ports are respectively designed on two sides of the lower part of the valve body 2, and overhaul blind plates 14 are covered on the overhaul ports. Cover the access hole with maintenance blind plate 14 during normal operating condition, open during the periodic overhaul and overhaul 14 accessible access holes of maintenance blind plate and observe the inside condition of valve, also can clear up through this access hole if there is debris to drop.

The driving method of the movement of the valve plate 1 is not limited, and for example, the electric hoist 16 may be selected. In some embodiments, as shown in fig. 8 and 9, the transmission comprises a frame 15, a winch 16 and a pulley block, the frame 15 forming a cavity for housing the valve plate 1; the fixed pulley 17 of the pulley block is arranged on the frame 15, the movable pulley 18 is arranged on the valve plate 1, and the winch 16 drives the valve plate 1 to move by using a rope 26 (steel wire rope) bypassing the pulley block so as to open or close the valve or adjust the opening of the valve, thereby cutting off or adjusting the circulation of high-temperature flue gas. The movable pulleys 18 are arranged at the upper end of the valve plate 1, the number of the movable pulleys 18 can be different according to different specifications of the valve, and if the size of the valve is larger, the number of the movable pulleys 18 can be increased so as to reduce the driving wheel of the winch 16; if the size of the utility model is smaller, the number of the movable pulleys 18 can be reduced, the number of parts is reduced, and the structure is simple. With the double traveling block 18 (see fig. 1) of the present embodiment, the driving force of the hoist 16 can be reduced to 1/4 of the weight of the valve plate 1.

When the working condition of the valve is a micro negative pressure, as shown in fig. 8, a louver 19 is arranged on the frame 15, and the louver blades of the louver 19 are arranged obliquely downwards; the frame 15 forms a non-sealing structure. The shutter 19 has two functions, namely, rainwater can be prevented from entering the valve, and the refractory castable 7 material is protected; secondly, when the valve is opened, the valve plate 1 is lifted, and the valve plate 1 is in a high-temperature state due to the fact that the valve plate 1 is in a high-temperature smoke environment for a long time, and the shutter 19 structure is adopted, so that heat on the valve plate 1 can be quickly dissipated, and the frame 15 is protected.

When the working condition of the valve is positive pressure, the outer part of the frame 15 is provided with a plate to seal the containing cavity to form a sealing structure, and the frame 15 and the plate outside the frame can be made of steel plates made of high-temperature resistant materials.

In some embodiments, the high-temperature flue gas gate valve further includes a controller (not shown), a display (not shown), an on-position proximity switch 20, an off-position proximity switch 21, and a sensing block, wherein the display, the on-position proximity switch 20, and the off-position proximity switch 21 are electrically connected to the controller respectively. As shown in fig. 8 in conjunction with fig. 10 and 11, the on-position proximity switch 20 and the off-position proximity switch 21 are both disposed on the frame 15, the on-position proximity switch 20 being disposed near the upper end of the frame 15, and the off-position proximity switch 21 being disposed near the lower end of the frame 15. The induction block is arranged on the valve plate 1, when the valve plate 1 moves to the full-open position of the valve, the induction block triggers the open-position proximity switch 20, and the open-position proximity switch 20 generates a first signal and sends the first signal to the controller; when the valve plate 1 moves to the full-off position of the valve, the induction block triggers the off-position proximity switch 21, the off-position proximity switch 21 generates a second signal and sends the second signal to the controller, the controller receives the first signal and the second signal and generates a corresponding display signal, and the display receives the display signal sent by the controller to display corresponding content. The state of the valve is convenient for operators to clearly know through the display.

In some embodiments, the winch 16 is provided with an angular displacement sensor electrically connected to the controller, the angular displacement sensor is used for sensing a rotation signal of the winch 16, the controller receives the rotation signal and generates a corresponding display signal, and the display receives the display signal sent by the controller to display the opening percentage of the valve. The angular displacement sensor of the embodiment can record an analog signal or a digital signal of a winding stroke, for example, the angular displacement sensor can output an analog signal of 4-20mA, the signal is input into a central control room and is controlled by a PLC module, and the opening percentage of a field valve can be remotely monitored and fed back in real time.

With continued reference to fig. 10 and 11, the upper end of the valve plate 1 is provided with a guide block 22, the guide block 22 can be used as an induction block, and when the valve plate 1 is lifted, the guide block 22 is used to trigger the on-position proximity switch 20 or the off-position proximity switch 21. The frame 15 comprises vertically arranged section steel, the vertical section steel is provided with a vertical section steel groove, the guide block 22 is positioned in the vertical section steel groove, and when the valve plate 1 is lifted, the guide block 22 moves along the vertical section steel groove. When 16 through assembly pulley drive valve plate 1 up-and-down motion of hoist engine, guide block 22 plays the guide effect, prevents that the valve from rocking from the left and right sides, and frame 15 can prevent to rock around the valve, and guide block 22 and the cooperation of frame 15 are spacing all around to valve plate 1, and protection valve plate 1 prevents to collide with.

With continuing reference to fig. 10, the high temperature flue gas gate valve of this embodiment further includes a safety pin 23, and the safety pin 23 is disposed on the frame 15. The guide block 22 is arranged on the outer side surface of the valve plate 1 in a protruding mode. When valve plate 1 moved to full open position, when the valve was opened completely, can insert safety pin 23 to the below of guide block 22 to the appearance chamber direction of frame 15, make guide block 22 can fall on safety pin 23, safety pin 23 plays the effect of bearing guide block 22 to fix a position valve plate 1 completely, avoid valve plate 1 whereabouts, guarantee maintainer's safety when the valve was overhauld. It should be noted that, when the valve is normally used, the safety pin 23 is hung on the frame 15, and only when the valve needs to be repaired, the safety pin 23 is used and inserted below the guide block 22 of the valve plate 1 to prevent the valve plate 1 from falling. The guide block 22 not only plays a role of guiding, but also serves as a sensing block and also serves as a limiting block, so that the structure is simplified, and parts can be reduced.

In some embodiments, as shown in fig. 8, the frame 15 is provided with a linear scale 24 arranged along the moving direction of the valve plate 1, and this embodiment is arranged on the left side in the figure. The valve plate 1 is provided with a pointer (not shown in the drawings) extending to the scale 24 in a direction perpendicular to the moving direction of the valve plate 1, and the pointer is indicated on the scale 24 when the valve plate 1 moves up and down, so that an operator can clearly observe the opening degree of the valve.

With continued reference to fig. 8, the frame 15 is further provided with an inspection ladder 25 to facilitate inspection by an inspector.

As shown in fig. 11, a circle of soft heat insulation felt 5 is arranged around the valve cavity 13 of the valve body 2 and the opening of the valve cavity 13 communicating with the cavity to compensate the gap between the valve body 2 and the valve plate 1, and the heat insulation felt 5 plays a certain sealing role when the valve plate 1 moves up and down to prevent external air from entering the valve cavity 13 of the valve body 2 to reduce the smoke temperature.

The high-temperature flue gas gate valve provided by the embodiment of the utility model can be stably operated for a long time under the severe working condition of a high-temperature flue gas pipeline of a kiln, and the problem that the valve plate 1 is broken and the like does not exist. The technical problems that an original high-temperature flue gas gate valve is not resistant to high temperature, a valve plate 1 is easy to break, inconvenient to overhaul and maintain, incapable of controlling the opening degree remotely and the like are solved. Greatly improving the production efficiency of enterprises. The high-temperature flue gas gate valve has a wide application range, and can be applied to various high-temperature kiln flue gas systems with micro negative pressure.

The above description is illustrative, and not restrictive, and variations, changes, modifications, substitutions, and alterations may be made to the above-described embodiments by those of ordinary skill in the art within the scope of the present disclosure. Also, the above-described examples (or one or more versions thereof) may be used in combination with each other, and it is contemplated that the embodiments may be combined with each other in various combinations or permutations. The scope of the utility model should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims (10)

1. The utility model provides a high temperature flue gas gate valve plate which characterized in that includes:

the double-layer plate body is provided with an interlayer;

the cooling water channel is arranged in the interlayer between the double-layer plate bodies and is used for introducing a cooling medium;

and the refractory castable is poured outside the double-layer plate body.

2. The high-temperature flue gas gate valve plate according to claim 1, wherein a spiral partition plate is arranged in an interlayer between the double-layer plate bodies, two opposite sides of the spiral partition plate are respectively combined with the opposite inner side surfaces of the double-layer plate bodies, and the spiral partition plate and the double-layer plate bodies are matched to form the spiral cooling water channel.

3. The high-temperature flue gas gate valve plate according to claim 1, wherein the outer part of the double-layer plate body is coated with a heat insulation felt and connected with anchoring nails, and the refractory castable is poured out of the heat insulation felt and is firmly held by the anchoring nails.

4. The high-temperature flue gas gate valve plate according to claim 1, wherein an expansion gap is formed on the surface of the refractory castable; the expansion gaps extend along the longitudinal direction or the transverse direction to form a crossed arrangement.

5. A high-temperature flue gas gate valve comprises a valve body, a valve plate and a transmission device, and is characterized in that the valve plate is the high-temperature flue gas gate valve plate in any one of claims 1 to 4.

6. The high-temperature flue gas gate valve according to claim 5, wherein a shell of the valve body is made of carbon steel welding parts, and a valve cavity is formed in the shell; the inner wall of the shell is welded with anchoring nails, a heat insulation felt is arranged, and a refractory castable is poured outside the heat insulation felt; and both sides of the lower part of the valve body are respectively provided with an access hole, and an access blind plate is arranged on the upper cover of the access hole.

7. The high-temperature flue gas gate valve according to claim 5, wherein the transmission device comprises a frame, a winch and a pulley block, and a cavity for accommodating the valve plate is formed in the frame; the pulley block is respectively arranged on the frame and the valve plate, so that the winch drives the valve plate to move by using a rope bypassing the pulley block so as to cut off or adjust the circulation of high-temperature flue gas;

a louver is arranged on the frame, and the louver blades of the louver are obliquely arranged downwards; or a high-temperature-resistant plate is arranged on the frame to seal the containing cavity.

8. The high-temperature flue gas gate valve of claim 7, further comprising a controller, a display, an on-position proximity switch, an off-position proximity switch, and an induction block, wherein the display, the on-position proximity switch, and the off-position proximity switch are electrically connected to the controller, the on-position proximity switch and the off-position proximity switch are both disposed on the frame, the induction block is disposed on the valve plate, the induction block triggers the on-position proximity switch when the valve plate moves to a full-open position of the valve, the on-position proximity switch generates a first signal and sends the first signal to the controller, the induction block triggers the off-position proximity switch when the valve plate moves to a full-off position of the valve, the off-position proximity switch generates a second signal and sends the second signal to the controller, and the controller receives the first signal and the second signal, and generating a corresponding display signal, wherein the display receives the display signal sent by the controller to display the corresponding content.

9. The high-temperature flue gas gate valve according to claim 8, wherein an angular displacement sensor is arranged on the winch, the angular displacement sensor is electrically connected with the controller, the angular displacement sensor is used for sensing a rotation signal of the winch, the controller receives the rotation signal and generates a corresponding display signal, and the display receives the display signal sent by the controller to display the opening percentage of the valve.

10. The high-temperature flue gas gate valve according to claim 8, wherein a guide block is arranged at the upper end of the valve plate, and the guide block forms the induction block; the frame comprises vertically arranged section steel, the guide block is positioned in a section steel groove of the vertically arranged section steel, and when the valve plate is lifted, the guide block moves along the section steel groove;

the frame is provided with a safety pin, and when the valve plate moves to a full-open position, the safety pin can be inserted into the bottom of the guide block to position the valve plate;

be equipped with on the frame along the calibrated scale of the linear type that the valve plate direction of motion set up, be equipped with on the valve plate along the perpendicular to the valve plate direction of motion extends to the pointer of calibrated scale to the aperture of instruction valve.

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