Pull-type door temperature adjusting structure and tank-type calciner

Abstract

This utility model relates to a traction-type door temperature control structure and a tank-type calcining furnace. The traction-type door temperature control structure includes a door frame support and a damper actuator. A damper is mounted on the door frame support, moving in a front-to-back direction. The damper has a damper hole. A damper hole baffle is rotatably mounted on the outer side of the damper via a damper shaft. A first traction rope is connected to the output end of the damper actuator. The end of the first traction rope away from the damper actuator is connected to the damper shaft. A damper hole baffle return spring is provided between the damper hole baffle and the damper. A damper return structure is connected to the damper. The return force of the damper return structure on the damper is greater than the return force of the damper hole baffle return spring on the damper hole baffle. This utility model solves the technical problem in the prior art where the damper actuator is too close to the furnace wall and easily affected by high temperatures.

Description

Technical Field

[0001] This utility model relates to the field of tank calcining furnace technology, and in particular to a traction-type door temperature control structure and a tank calcining furnace. Background Technology

[0002] A pot-type calcining furnace consists of several vertically arranged calcining pots lined with refractory materials. Generally, at least two calcining pots are arranged as a group, and each group of calcining pots is arranged sequentially in the front-to-back direction. The number of groups is set according to the configuration and capacity requirements to meet production needs.

[0003] Heating channels are provided on both the left and right sides of each calcining tank. The existing heating channel structure is such as the "Automatic Temperature Control System for a Compressed Air Calcining Furnace" disclosed in Chinese Patent CN218567913U, which includes a furnace body. The furnace body has multiple layers of channels arranged in an S-shape and connected sequentially from top to bottom. The inlet of the first layer of channels (the first layer of channels from top to bottom) is connected to the volatile matter pipe, and a damper is provided at the connection. Upper temperature measuring elements and lower temperature measuring elements are respectively provided in the second layer of channels and the bottom layer of channels. The upper temperature measuring element is used to detect the temperature of the second layer of channels, and the lower temperature measuring element is used to detect the temperature of the bottom layer of channels. The outlet of the bottom layer of channels is connected to the exhaust duct located on the right side of the furnace body. The top height of the exhaust duct is higher than the top height of the fifth layer of channels.

[0004] In actual use, the flue is a negative pressure environment. The fuel from the gas source enters and burns through the first-layer flue, then burns along the flue, conducting heat non-contactly with the material in the combustion chamber. Temperature control of the bottom flue is particularly important, as excessively high temperatures in the bottom flue can damage the cast iron support plate of the furnace bottom, severely impacting the furnace's lifespan. Therefore, in existing technology, when the temperature sensing element detects that the temperature of the bottom flue exceeds the set value, the damper opens, allowing cold air to enter from the first-layer flue. From top to bottom, the temperature of each flue gradually decreases, with the first-layer flue decreasing first. When the temperature of the bottom flue falls below the set value, the damper closes.

[0005] The existing problems with this type of pot-type calcining furnace are as follows: 1. The damper actuator that drives the damper is close to the furnace wall, and the temperature of the furnace body will affect the service life of the components on the damper actuator; 2. In the entire fire channel structure, when the bottom fire channel needs to be cooled, the first fire channel takes the first cold air and cools down first. When the bottom fire channel reaches the design temperature, the temperature of the first fire channel and other fire channels may have already fallen below the set temperature, which will inevitably cause carbon product quality problems; 3. The temperature of the calcining furnace pot group at different positions is not the same. Usually, the temperature of the calcining furnace pot group at the front and rear ends is lower than that of the calcining furnace pot group in the middle position. The existing technology cannot achieve temperature control of individual heating fire channels in each calcining furnace pot group. Utility Model Content

[0006] The purpose of this utility model is to provide a traction-type door temperature control structure to solve the technical problem that the damper actuator is too close to the furnace wall and is easily affected by high temperature in the prior art; the purpose of this utility model is also to provide a tank-type calcining furnace using the traction-type door temperature control structure.

[0007] To solve the above-mentioned technical problems, the technical solution of the traction-type door temperature control structure in this utility model is as follows:

[0008] A traction-type door temperature control structure includes a door frame support and a door actuator. The door frame support is equipped with a door for blocking or opening a corresponding fire duct make-up air inlet, which moves along a front-to-back direction. The door has a door hole. A door hole baffle with a rotation axis extending left-right is rotatably mounted on the outer side of the door via a door shaft. A first traction rope is connected to the actuation output end of the door actuator. The end of the first traction rope away from the door actuator is connected to the door shaft. A door hole baffle return spring is provided between the door hole baffle and the door. A door return structure is connected to the door. The return force of the door return structure on the door is greater than the return force of the door hole baffle return spring on the door hole baffle. The door actuator pulls the door shaft via the first traction rope, causing the door hole baffle to rotate and open the door hole. After the door hole baffle reaches its rotation limit, the door actuator pulls the door along the first traction rope to open the fire duct make-up air inlet.

[0009] Furthermore, the damper reset structure includes a second traction rope connected to the damper, and a reset counterweight is connected to the lower end of the second traction rope.

[0010] Furthermore, the damper hole is a fan-shaped hole structure, and the damper hole baffle is a fan-shaped plate structure with a size not smaller than the damper hole.

[0011] Furthermore, a baffle block is provided on the outside of the damper to limit the opening limit of the damper hole baffle. When the damper hole baffle is blocked by the baffle block, the end of the first traction rope connected to the damper shaft is arranged horizontally in the front-back direction.

[0012] Furthermore, the damper actuator is an electric push rod or a reel driven by a motor.

[0013] A calcining furnace includes at least two heating channels arranged sequentially in a front-to-back direction, with a calcining tank between adjacent heating channels. Each heating channel includes a furnace body, within which multiple layers of heating channels are arranged in an S-shape and connected sequentially from top to bottom. A gas inlet is connected to the uppermost heating channel, and a flue is connected to the lowermost channel. Temperature sensing elements are installed in each heating channel, and each heating channel is also connected to a channel air inlet. An openable or closeable damper is installed at each air inlet. The damper is guided and mounted on a damper frame in a front-to-back direction and is driven by a damper actuator. The damper has a damper hole, and its outer side rotates via a damper shaft. The device is equipped with a damper hole baffle whose rotation axis extends in the left-right direction. A first traction rope is connected to the actuation output end of the damper actuator. The end of the first traction rope away from the damper actuator is connected to the damper shaft. A damper hole baffle return spring is provided between the damper hole baffle and the damper. A damper return structure is connected to the damper. The return force of the damper return structure on the damper is greater than the return force of the damper hole baffle return spring on the damper hole baffle. The damper actuator pulls the damper shaft through the first traction rope. The damper hole baffle opens the damper hole by rotating. After the damper hole baffle reaches its rotation limit, the damper actuator pulls the damper by the first traction rope to open the fire duct air supply port.

[0014] Furthermore, the fire channel temperature control system also includes a gas supply system, which includes gas supply pipes that are connected to the heating fire channels of each floor, and each gas supply pipe is equipped with a supply pipe valve.

[0015] Furthermore, the damper reset structure includes a second traction rope connected to the damper, and a reset counterweight is connected to the lower end of the second traction rope.

[0016] Furthermore, the damper hole is a fan-shaped hole structure, and the damper hole baffle is a fan-shaped plate structure with a size not smaller than the damper hole.

[0017] Furthermore, a baffle block is provided on the outside of the damper to limit the opening limit of the damper hole baffle. When the damper hole baffle is blocked by the baffle block, the end of the first traction rope connected to the damper shaft is arranged horizontally in the front-back direction.

[0018] The beneficial effects of this utility model are as follows: In use, when the temperature of a certain heating flue is too high, the corresponding heating flue needs to be cooled by air intake. However, to avoid the damper opening directly, which would cause the flue air intake to open too large, resulting in a rapid temperature drop, this utility model uses a first traction rope to pull the damper shaft. Because the damper reset structure exerts a greater reset force on the damper than the damper hole baffle reset spring exerts on the damper hole baffle, the damper will not move initially; only the damper hole baffle rotates and gradually opens the damper hole. This reduces the heating fire... The air intake volume is initially used to cool the heating flue with a small air volume. If the temperature of the heating flue does not reach the design temperature, the damper actuator will continue to pull the damper orifice baffle via the first traction rope, continuously opening the damper orifice. When the damper orifice baffle reaches its opening limit, if the temperature of the heating flue still does not reach the design temperature, the damper actuator will continue to pull the damper shaft via the first traction rope. At this point, the damper shaft can no longer rotate, and the entire damper opens the flue's air supply port through horizontal movement in the front-back direction. When the entire damper is fully open, maximum air intake cooling can be achieved, thus improving the damper's adjustment gradient. The damper actuator opens the damper via the first traction rope. The damper actuator can be set further away from the furnace wall to minimize the impact of the furnace temperature on the damper actuator. Attached Figure Description

[0019] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding portions, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the pot-type calcining furnace of this utility model;

[0021] Figure 2 yes Figure 1 Side view;

[0022] Figure 3 yes Figure 1 Enlarged view of point A;

[0023] Figure 4 This is a schematic diagram of the interaction between the damper actuator and the damper in Example 1;

[0024] Figure 5 yes Figure 4 A schematic diagram showing the state when the damper opening baffle is open but the damper is not moved;

[0025] Figure 6 yes Figure 4 A schematic diagram showing the state of the air damper after the baffle is opened and the damper is moved.

[0026] Figure 7 This is a schematic diagram of the damper actuator in Embodiment 2 of the pot-type calcining furnace of this utility model;

[0027] Figure 8 This is a schematic diagram of the damper actuator in Embodiment 3 of the pot-type calcining furnace of this utility model;

[0028] 1. Gas inlet; 2. Furnace body; 3. First heating flue; 4. Temperature sensing element; 5. Insulated sealing cover; 6. Regulating valve actuator; 7. Flue air supply inlet; 8. Main feed pipe; 9. Second heating flue; 10. Furnace body partition; 11. Third heating flue; 12. nth heating flue; 13. Furnace body support leg; 14. Flue; 15. Flue support leg; 16. Gas feed pipe; 17. Flue connection port; 18. Calcining tank; 19. Feed pipe valve; 20. Regulating valve actuator 21. Valve connector; 22. Regulating valve; 23. Damper actuator; 24. Reversing pulley; 25. First traction rope; 26. Rope tensioner; 27. Damper hole baffle; 28. Door frame bracket; 29. ​​Damper; 30. Damper hole baffle return spring; 31. Damper shaft; 32. Baffle block; 33. Second traction rope; 34. Return counterweight; 35. Damper hole; 36. Potential gauge; 37. Potential gauge measuring rod; 38. Action output rod; 39. Motor; 40. Winding reel. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0030] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0031] An embodiment of the pot-type calcining furnace in this utility model is as follows: Figures 1-6 As shown:

[0032] The furnace includes multiple heating channels arranged in a reverse order, with two calcining tanks 18 spaced apart from each other between adjacent heating channels. The calcining tanks are vertically arranged. The heating channels include a furnace body 2, with furnace body support legs 13 at the bottom. The furnace body has multiple layers of heating channels arranged in an S-shape, connected sequentially from top to bottom. In this embodiment, there are eight layers of heating channels from top to bottom, namely, the first layer heating channel 3, the second layer heating channel 9, the third layer heating channel 11, ..., the nth layer heating channel 12, where n is 8. The right end of the first layer heating channel is connected to a gas inlet 1, and the right end of the eighth layer heating channel is connected to a flue 14. All of the above are prior art and will not be described in detail here.

[0033] The innovation of this utility model lies in the fact that each layer of heating flue is equipped with a temperature measuring element 4, and each layer of heating flue is also connected to a flue air supply port 7. Each flue air supply port 7 is equipped with an air damper 29 that can be opened or closed, driven by an air damper actuator 23. The flue temperature control system also includes a gas supply system, which includes gas supply pipes 16 that communicate with each layer of heating flue. Each gas supply pipe 16 is equipped with a supply pipe valve 19, and gas supply pipes in the same row are connected to the same vertically arranged main supply pipe 8. The supply pipe valve is a solenoid valve.

[0034] In this embodiment, a plurality of furnace body partitions 10 are provided in the inner cavity of the furnace body at intervals along the vertical direction. The furnace body partitions 10 divide the inner cavity of the furnace body into the heating channels. A channel connection port 17 is formed between the furnace body partition and the left or right side wall of the furnace body to connect two adjacent heating channels in the vertical direction. The channel temperature control system also includes a channel connection port adjustment device.

[0035] The flue passage regulating device includes a regulating valve 22, which is guided and mounted on the corresponding furnace wall in a left-right direction. The regulating valve 22 is made of refractory material. The device also includes regulating valve actuators 6, which are arranged on the outside of the furnace body and correspond one-to-one with the regulating valves. In this embodiment, the regulating valve actuator 6 is an electric push rod. The actuation output end 20 of the regulating valve actuator is connected to the regulating valve. The regulating valve moves toward the corresponding furnace body partition, thereby reducing the opening size of the flue passage 17. When the regulating valve moves away from the corresponding furnace body partition, it can retract into the inner wall of the furnace body. At this time, the regulating valve is not directly located in the heating flue, reducing the heat received by the regulating valve.

[0036] The regulating valve is connected to a valve connector 21 via a dovetail groove on the side away from the furnace body. The valve connector 21 is a metal structure. The action output end 20 of the regulating actuator is hinged to the valve connector via a hinge shaft. The hinge shaft connection here has two functions: one is to increase the degree of freedom of movement in a conventional way and avoid stress concentration; the other is to reduce the contact area between the action output end and the valve connector. This can reduce the heat transferred to the action output end through the valve connector and prevent the regulating actuator from overheating.

[0037] The valve joint is surrounded by a heat-insulating sealing cover 5. The heat-insulating sealing cover 5 is a hollow structure, and the hollow inner cavity of the heat-insulating sealing cover is filled with heat-insulating material. One end of the heat-insulating sealing cover 5 is fixed to the outer wall of the furnace body, and the other end of the heat-insulating sealing cover is guided and moved in conjunction with the action output end of the regulating valve actuator. The main body of the regulating valve actuator is fixed to the steel frame. Figure 1 (Not shown in the image) The heat insulation sealing cover 5 can reduce heat loss caused by the gap between the regulating valve and the furnace body. At the same time, the heat insulation sealing cover 5 also provides guidance for the movement of the actuation output end, preventing the actuation output end from deviating and causing the regulating valve to fail to operate smoothly.

[0038] The regulating valve is used in the following situations: For example, when the temperature of all heating channels below the third heating channel is higher than the set value, the size of the connection between the third and fourth heating channels can be reduced by adjusting the valve, thereby reducing the gas supply to all heating channels below the third heating channel and lowering their temperature. If only one heating channel is overheating, the temperature of that channel can be lowered by opening the corresponding air supply port, while simultaneously adjusting the temperatures of other heating channels.

[0039] In this invention, the flue is fixed to the bottom right side of the furnace body, and a flue support leg 15 is provided at the bottom of the flue. The top height of the flue is not higher than the bottom height of the lower n-1 layer heating flue. Therefore, the flue will not interfere with the setting of the corresponding temperature measuring element 4, the flue air inlet 7, and the gas supply pipe 16. Therefore, in this invention, it can be set up as follows: the gas inlet 1 is located at the right end of the first layer heating flue; for odd-numbered layers of flues, the temperature measuring element 4 is located at the left end of the corresponding odd-numbered layer heating flue, and the gas supply pipe 16 is located at the right end of the corresponding odd-numbered layer heating flue; for even-numbered layers of flues, the temperature measuring element is located at the right end of the corresponding even-numbered layer heating flue, and the gas supply pipe is located at the left end of the corresponding even-numbered layer heating flue.

[0040] The advantages of this setup are as follows: For example, when the air inlet at the right end of the third-layer heating flue is opened, cold air enters through the third-layer heating flue and moves from right to left. If the temperature sensing element of the third-layer heating flue is located at the right end, the cold air will easily affect the temperature measurement of the sensing element, causing it to fail to accurately reflect the temperature of the third-layer heating flue. Similarly, when the fuel supply valve of the third-layer heating flue needs to be opened to supply gas to the third-layer heating flue, the gas enters through the right end of the third-layer heating flue. After the gas has been fully combusted along the entire length of the third-layer heating flue, the temperature sensing element of the third-layer heating flue measures the temperature at the left end, thus ensuring the accuracy of the temperature measurement.

[0041] Each of the 7 fire duct make-up air inlets is equipped with a door frame bracket 28. The air damper 29 is a plate-shaped structure. The air damper 29 is guided and moved in the front-back direction to be assembled on the corresponding door frame bracket 28. The air damper 29 can block or open the corresponding fire duct make-up air inlet 7 by moving back and forth. Specifically, the upper and lower ends of the air damper are guided and moved in the front-back direction with the door frame bracket.

[0042] The damper is provided with a damper hole 35 that runs through the damper in the left and right direction. The outside of the damper is rotatably fitted with a damper hole baffle 27 whose rotation axis extends in the left and right direction via a damper shaft 31. The damper shaft 31 is located below the damper hole 35. In this embodiment, the damper hole is a fan-shaped hole structure, and the damper hole baffle is a fan-shaped plate structure with a size not smaller than the damper hole.

[0043] In this embodiment, the damper actuator 23 is an electric push rod. The actuation output rod of the electric push rod constitutes the actuation output end of the damper actuator. A first traction rope 25 is connected to the actuation output end of the damper actuator. The end of the first traction rope 25 away from the damper actuator is connected to the damper shaft 31. Specifically, the end of the first traction rope 31 away from the damper actuator is wound around the damper shaft 31. A damper hole baffle return spring 30 is provided between the damper hole baffle 27 and the damper 29. A damper return structure is connected to the damper. In this embodiment, the damper return structure includes a second traction rope 33 connected to the damper. The lower end of the second traction rope 33 is connected to a return counterweight 34. Items 24 in the figure represent reversing pulleys through which the corresponding traction ropes pass for reversing.

[0044] A baffle block 32 is provided on the outside of the damper to limit the opening limit of the damper hole baffle. When the damper hole baffle 27 is stopped by the baffle block 32, the end of the first traction rope 25 connected to the damper shaft 31 is arranged horizontally in the front-back direction. In this way, when the first traction rope pulls the damper 29 forward, there will be no force in other directions, and the damper moves more smoothly.

[0045] The damper, damper hole baffle, door frame bracket, damper actuator, first traction rope, damper reset structure, damper hole baffle reset spring and baffle block, and their structural connections together constitute the traction-type door temperature control structure.

[0046] In practical use, a temperature threshold is set for each heating flue, for example, 980℃ or 1030℃. When the temperature of the corresponding heating flue is higher than 1030℃, the flue's air inlet needs to be opened to allow natural air (which can also be called cold air compared to the furnace temperature) to cool the flue. When the temperature is lower than 1030℃, the air inlet is closed. When the temperature of the corresponding heating flue is lower than 980℃, the gas supply pipe needs to be opened to replenish the gas supply. When the temperature of the heating flue exceeds 980℃, the gas supply pipe is shut off. When the overall temperature of all heating flues below a certain layer is too high, the regulating valve 22 of the corresponding layer's heating flue needs to be adjusted to reduce the opening size of the corresponding flue connection. If the design temperature still cannot be reached, cooling is required through the corresponding layer's air supply inlet. When the overall temperature of all heating flues below a certain layer is too low, the opening size of the corresponding flue connection needs to be increased. If the design temperature still cannot be reached, gas supply is required through the corresponding layer's gas supply pipe. Ultimately, each layer's heating flue can be independently adjusted, ensuring that the temperature of each heating flue in the front-to-back direction and in the height direction is within the set temperature range.

[0047] In this embodiment, the temperature sensing element monitors the temperature of each heating channel in real time. Therefore, if the temperature of the heating channel is only slightly higher than the set temperature, the damper actuator may activate. If the damper moves back and forth directly at this time to open the air supply port of the heating channel, the opening size of the air supply port may be too large, resulting in too much cold air entering and the temperature of the corresponding heating channel dropping too quickly. Therefore, in this invention, before the damper moves as a whole, the damper hole on the damper is first opened by the first traction rope to achieve small air volume adjustment. If the temperature cannot be quickly reduced even when the damper hole is fully opened, the damper then moves as a whole to open the movable air supply port, thereby achieving rapid cooling of the corresponding heating channel.

[0048] When the damper actuator is in operation, its output rod extends. Because the damper reset structure exerts a greater reset force on the damper than the damper orifice baffle reset spring exerts on the damper orifice baffle, the damper does not move back and forth initially when the first traction rope is pulled. The damper shaft rotates, causing the damper orifice baffle to gradually open. As the damper orifice baffle continues to rotate, it reaches its maximum opening when stopped by a baffle block. At this point, the baffle cannot continue to rotate, and with the continued pull of the first traction rope, the entire damper moves forward, gradually opening the fire duct air supply port. The opening size of the fire duct air supply port is larger than the opening size of the damper orifice. When it is necessary to close the fire duct air supply port, the damper actuator's output rod retracts. Under the action of the damper reset structure, the damper moves backward to reset. A stop (not shown in the figure) is provided on the door frame support to limit the damper's backward movement. Under the action of the damper orifice baffle reset spring, the damper orifice baffle rotates to reset.

[0049] Example 2 of a pot-type calcining furnace Figure 7 As shown, in Embodiment 2, which differs from Embodiment 1, a potential ruler 36 is also included, which is arranged in parallel with the damper actuator 23. The measuring rod 37 of the potential ruler is connected to the action output rod 38 of the damper actuator. The potential ruler can be used to detect the movement distance of the action output rod of the damper actuator, thereby facilitating the control of the pulling length of the first traction rope 25.

[0050] Example 3 of a pot-type calcining furnace Figure 8 As shown: The difference between Embodiment 3 and Embodiment 1 is that the damper actuator includes a winding reel 40 driven by a motor 39, and a first traction rope 25 is wound on the winding reel 40.

[0051] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0053] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pull-type door temperature regulating structure comprising a door frame support and a door actuator, characterized in that: A damper for blocking or opening the corresponding fire duct air supply port is mounted on the door frame support and guided to move along the front-back direction. The damper has a damper hole. A damper hole baffle with a rotation axis extending in the left-right direction is mounted on the outer side of the damper via a damper shaft. A first traction rope is connected to the actuation output end of the damper actuator. The end of the first traction rope away from the damper actuator is connected to the damper shaft. A damper hole baffle return spring is provided between the damper hole baffle and the damper. A damper return structure is connected to the damper. The return force of the damper return structure on the damper is greater than the return force of the damper hole baffle return spring on the damper hole baffle. The damper actuator pulls the damper shaft through the first traction rope. The damper hole baffle opens the damper hole by rotating. After the damper hole baffle reaches its rotation limit, the damper actuator pulls the damper by the first traction rope to open the fire duct air supply port.

2. The retractable door temperature regulating structure according to claim 1, wherein: The damper hole is a fan-shaped hole structure, and the damper hole baffle is a fan-shaped plate structure with a size not smaller than the damper hole.

3. The traction-type door temperature control structure according to claim 1, characterized in that: The outside of the damper is equipped with a baffle block to limit the opening limit of the damper hole baffle. When the damper hole baffle is blocked by the baffle block, the end of the first traction rope connected to the damper shaft is arranged horizontally in the front-back direction.

4. The door temperature control structure according to any one of claims 1 to 3, characterized in that: The damper actuator is an electric push rod or a reel driven by a motor.

5. A pot-type calcining furnace, comprising at least two heating channels arranged sequentially in a front-to-back direction, with a calcining pot between adjacent heating channels, each heating channel comprising a furnace body, the furnace body having multiple layers of heating channels arranged in an S-shape and connected sequentially from top to bottom, the uppermost heating channel being connected to a gas inlet, and the lowermost heating channel being connected to a flue, characterized in that: Each heating flue is equipped with a temperature sensing element, and each heating flue is also connected to a flue air supply port. Each flue air supply port is equipped with an air damper that can be opened or closed. The air damper is guided and mounted on an air damper frame in a front-to-back direction. The air damper is driven by an air damper actuator. The air damper has an air damper hole, and an air damper hole baffle with a rotation axis extending in the left-right direction is mounted on the outer side of the air damper via an air damper shaft. A first traction rope is connected to the actuation output end of the air damper actuator, and the first traction rope is located away from the air damper actuator. One end is connected to the damper shaft. A damper hole baffle return spring is provided between the damper hole baffle and the damper. A damper return structure is connected to the damper. The return force of the damper return structure on the damper is greater than the return force of the damper hole baffle return spring on the damper hole baffle. The damper actuator pulls the damper shaft through the first traction rope. The damper hole baffle opens the damper hole by rotating. After the damper hole baffle reaches the rotation limit, the damper actuator pulls the damper to move through the first traction rope to open the fire channel air supply port.

6. The rotary calciner of claim 5, wherein: The fire channel temperature control system also includes a gas supply system, which includes gas supply pipes that are connected to the heating fire channels of each floor, and each gas supply pipe is equipped with a supply pipe valve.

7. The rotary calciner of claim 5, wherein: The damper reset structure includes a second traction rope connected to the damper, and a reset counterweight is connected to the lower end of the second traction rope.

8. The rotary calciner of claim 5, wherein: The damper hole is a fan-shaped hole structure, and the damper hole baffle is a fan-shaped plate structure with a size not smaller than the damper hole.

9. A tank-type calciner according to any one of claims 5 to 8, characterized in that: The outside of the damper is equipped with a baffle block to limit the opening limit of the damper hole baffle. When the damper hole baffle is blocked by the baffle block, the end of the first traction rope connected to the damper shaft is arranged horizontally in the front-back direction.

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