Dragging type door temperature adjusting structure and pot-type calcining furnace

Abstract

The traction type door temperature adjusting structure comprises a door frame support and an air door actuator, an air door is movably assembled on the door frame support in the front-back direction in a guiding mode, an air door hole is formed in the air door, and an air door hole baffle is rotationally assembled on the outer side of the air door through an air door shaft; a first traction rope is connected to the action output end of the air door actuator, the end, away from the air door actuator, of the first traction rope is connected with the air door shaft, an air door hole baffle reset spring is arranged between the air door hole baffle and the air door, and an air door reset structure is connected to the air door. The reset force of the air door reset structure on the air door is larger than the reset force of the air door hole baffle reset spring on the air door hole baffle. The technical problem that in the prior art, a wind door actuator is close to the furnace wall and is prone to being affected by high temperature is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pot-type calcining furnaces, and particularly to a traction door temperature control structure and a pot-type calcining furnace. Background Art

[0002] The pot-type calcining furnace includes a plurality of vertically arranged calcining pots made of refractory materials. Generally, at least two calcining pots arranged side by side are taken as a group, and each group of calcining pots is arranged in sequence in the front-back direction. Different numbers of groups are set according to the requirements of configuration and production capacity to meet the production needs.

[0003] Heating flues are arranged on both the left and right sides of each calcining pot. The existing heating flue structure is as disclosed in the Chinese patent CN218567913U, "An Automatic Temperature Control System for a Calcining Furnace by Compressed Air Method", which includes a furnace body. Inside the furnace body, multiple layers of flues arranged in an S shape and communicating with each other are formed from top to bottom. The inlet of the first-layer flue (the first layer of flue from top to bottom) is communicated with the volatile matter pipeline, and a damper is arranged at the communication point. An upper temperature measuring element and a lower temperature measuring element are respectively arranged in the second-layer flue and the bottom-layer flue. The upper temperature measuring element is used to detect the temperature of the second-layer flue, and the lower temperature measuring element is used to detect the temperature of the bottom-layer flue. The outlet of the bottom-layer flue is communicated with a smoke exhaust flue located on the right side of the furnace body, and the top height of the smoke exhaust flue is higher than the top height of the fifth-layer flue.

[0004] In actual use, the smoke exhaust flue is in a negative pressure environment. The fuel of the gas source enters the combustion through the first-layer flue, and then burns along the flue, and conducts heat non-contact with the materials in the combustion pot. The temperature control of the bottom-layer flue is relatively important because if the temperature of the bottom-layer flue is too high, the cast iron support furnace bottom plate will be burned out, seriously affecting the service life of the calcining furnace. Therefore, in the prior art, when the lower temperature measuring element detects that the temperature of the bottom-layer flue exceeds the set value, the damper opens, and cold air enters from the first-layer flue. From top to bottom, the temperatures of each layer of flue gradually begin to decrease, and the temperature of the first-layer flue decreases first. When the temperature of the bottom-layer flue is lower than the set value, the damper closes.

[0005] The problems existing in the existing such pot-type calcining furnace are as follows: 1. The damper actuator that drives the damper action is relatively 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 flue structure, when the bottom-layer flue needs to be cooled down, the first-layer flue first enters cold air and cools down first. When the bottom-layer flue reaches the designed temperature, the temperatures of the first-layer flue and other layers of flue may have been lower than the set temperature, which will inevitably cause problems with the quality of carbon products; 3. The temperatures of the calcining furnace pot groups at different positions are also different. Usually, the temperatures of the calcining furnace pot groups at the front and rear ends are lower than those of the calcining furnace pot groups in the middle position. In the prior art, the temperature control of a single heating flue in each calcining furnace pot group cannot be achieved. Summary of the Invention

[0006] The object of the present invention is to provide a traction door temperature control structure to solve the technical problem in the prior art that the damper actuator is close to the furnace wall and is easily affected by high temperature; another object of the present invention is to provide a pot type calciner using the traction door temperature control structure.

[0007] To solve the above technical problems, the technical solution of a traction door temperature control structure in the present invention is as follows: A traction door temperature control structure includes a door frame support and a damper actuator. A damper for blocking or opening the air inlet of the corresponding flue is assembled on the door frame support to be guided and moved in the front-rear direction. A damper hole is provided on the damper. A damper hole baffle with a rotation axis extending in the left-right direction is rotatably assembled on the outer side of the damper through a damper shaft. A first traction rope is connected to the action output end of the damper actuator. The end of the first traction rope far 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, and the damper hole baffle rotates to open the damper hole. 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 air inlet of the flue.

[0008] Further, the damper return structure includes a second traction rope connected to the damper, and a return weight is connected to the lower end of the second traction rope.

[0009] Further, the damper hole is of a sector hole structure, and the damper hole baffle is of a sector plate structure with a size not less than that of the damper hole.

[0010] Further, a baffle stop for limiting the opening limit of the damper hole baffle is provided on the outer side of the damper. When the damper hole baffle is blocked by the baffle stop, the end of the first traction rope connected to the damper shaft is horizontally arranged in the front-rear direction.

[0011] Further, the damper actuator is an electric push rod or a wire reel driven by a motor.

[0012] A pot-type calciner includes at least two heating flues arranged in sequence in the front-rear direction. There are calcining pots between adjacent heating flues. The heating flue includes a furnace body. Multiple layers of heating flues arranged in an S shape and communicating with each other in sequence are formed from top to bottom in the furnace body. A gas feed port is communicated with the uppermost layer of heating flue, and a flue is communicated with the lowermost flue. Temperature measuring elements are arranged in each layer of heating flue. A flue air supply port is also connected to each layer of heating flue. A damper capable of being opened or closed is arranged at the flue air supply port. The damper is guided and movably assembled on a damper frame in the front-rear direction. The damper is driven by a damper actuator. A damper hole is arranged on the damper. A damper hole baffle with a rotation axis extending in the left-right direction is rotatably assembled on the outside of the damper through a damper shaft. A first towing rope is connected to the action output end of the damper actuator. The end of the first towing rope far from the damper actuator is connected to the damper shaft. A damper hole baffle return spring is arranged between the damper hole baffle and the damper. A damper return structure is connected to the damper. The restoring force of the damper return structure on the damper is greater than the restoring force of the damper hole baffle return spring on the damper hole baffle. The damper actuator pulls the damper shaft through the first towing 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 towing rope to open the flue air supply port.

[0013] Further, the flue temperature control system further includes a gas feeding system. The gas feeding system includes gas feeding pipes respectively communicating with each layer of heating flue. A feeding pipe valve is arranged on each gas feeding pipe.

[0014] Further, the damper return structure includes a second towing rope connected to the damper. A restoring weight is connected to the lower end of the second towing rope.

[0015] Further, the damper hole is of a sector hole structure, and the damper hole baffle is of a sector plate structure with a size not less than that of the damper hole.

[0016] Further, a baffle stop block for limiting the opening limit of the damper hole baffle is arranged on the outside of the damper. When the damper hole baffle is blocked by the baffle stop block, the end of the first towing rope connected to the damper shaft is horizontally arranged in the front-rear direction.

[0017] The beneficial effects of the present invention are as follows: In the present invention, when in use, if the temperature of a certain heating flue is too high, the corresponding heating flue needs to intake air to cool down. However, in order to avoid the direct opening of the air damper, which may cause the opening size of the air inlet of the flue to be too large, as this will lead to too rapid a temperature drop instantaneously. In the present invention, the air damper actuator pulls the air damper shaft through the first towing rope. Since the restoring force of the air damper reset structure on the air damper is greater than the restoring force of the air damper orifice baffle reset spring on the air damper orifice baffle, at the beginning of the pulling, the air damper will not move, but only the air damper orifice baffle rotates to gradually open the air damper orifice. In this way, the air intake volume of the heating flue can be reduced, realizing a small air volume cooling at the beginning of the heating flue. If the temperature of the heating flue still does not reach the designed temperature, the air damper actuator will continue to pull the air damper orifice baffle through the first towing rope, and the air damper orifice baffle will continuously open the air damper orifice. When the air damper orifice baffle reaches the opening limit position, if the temperature of the heating flue still does not reach the designed temperature, the air damper actuator will continuously pull the air damper shaft through the first towing rope. At this time, the air damper shaft can no longer rotate, and the entire air damper opens the air inlet of the flue through horizontal movement in the front-back direction. When the entire air damper is fully opened, the maximum air intake volume cooling can be achieved, thus improving the adjustment gradient of the air damper. The air damper actuator realizes the opening of the air damper through the first towing rope. The air damper actuator can be set at a position farther away from the furnace wall to minimize the influence of the furnace body temperature on the air damper actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 FIG. 8 is a schematic structural diagram of Embodiment 1 of the pot-type calciner in the present invention; Figure 2 is Figure 1 a side view of Figure 3 is Figure 1 an enlarged view of part A of Figure 4 FIG. 21 is a schematic diagram of the cooperation between the air damper actuator and the air damper in Embodiment 1; Figure 5 is Figure 4 a schematic diagram of the state when the air damper orifice baffle is opened and the air damper does not move in Figure 6 is Figure 4 a schematic diagram of the state after the air damper orifice baffle is opened and the air damper moves in Figure 7 FIG. 34 is a schematic structural diagram of the air damper actuator in Embodiment 2 of the pot-type calciner in the present invention; Figure 8It is a schematic structural diagram of a damper actuator in Embodiment 3 of the pot-type calciner in the present invention; 1. Gas feed port; 2. Furnace body; 3. First-layer heating flue; 4. Temperature measuring element; 5. Heat insulation and sealing cover; 6. Regulating valve actuator; 7. Flue air supply port; 8. Main replenishment material pipeline; 9. Second-layer heating flue; 10. Furnace body partition; 11. Third-layer heating flue; 12. nth-layer heating flue; 13. Furnace body support leg; 14. Flue; 15. Flue support leg; 16. Gas replenishment pipe; 17. Flue connection port; 18. Calcining pot; 19. Replenishment pipe valve; 20. Action output end of the regulating valve actuator; 21. Valve joint; 22. Regulating valve; 23. Damper actuator; 24. Reversing pulley; 25. First towing rope; 26. Tightening rope device; 27. Damper hole baffle; 28. Door frame support; 29. Damper; 30. Damper hole baffle return spring; 31. Damper shaft; 32. Baffle stop block; 33. Second towing rope; 34. Reset counterweight; 35. Damper hole; 36. Potentiometer ruler; 37. Measuring rod of the potentiometer ruler; 38. Action output rod; 39. Motor; 40. Wire winding wheel. Detailed implementation manners

[0019] For the convenience of understanding the present invention, the present invention will be described in more detail below with reference to the drawings and specific embodiments. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive.

[0020] 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 those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention.

[0021] An embodiment of a pot-type calciner in the present invention is as Figures 1 to 6 shown: It includes a plurality of heating flues arranged in sequence in the front-rear direction. There are two calcining pots 18 arranged at intervals left and right between adjacent heating flues, and the calcining pots are arranged vertically. The heating flue includes a furnace body 2. The bottom of the furnace body 2 is provided with furnace body support legs 13. A plurality of layers of heating flues arranged in an S shape and communicating with each other in sequence are formed in the furnace body from top to bottom. In this embodiment, there are a total of eight layers of heating flues from top to bottom, which are, from top to bottom, the first-layer heating flue 3, the second-layer heating flue 9, the third-layer heating flue 11... the nth-layer heating flue 12, where n is 8. The right end of the first-layer heating flue is connected to a gas feed port 1, and the right end of the eighth-layer heating flue is connected to a flue 14. The above all belong to the prior art and will not be elaborated here.

[0022] The innovation of the present invention lies in that, in the present invention, temperature measuring elements 4 are provided in each layer of heating flue, and flue air supply openings 7 are also connected to each layer of heating flue. A damper 29 capable of being opened or closed is provided at the flue air supply opening 7, and the damper is driven by a damper actuator 23. The flue temperature control system further includes a gas feeding system. The gas feeding system includes gas feeding pipes 16 respectively communicating with each layer of heating flue. Feeding pipe valves 19 are provided on each gas feeding pipe 16, and the gas feeding pipes in the same column are connected to the same vertically arranged main feeding pipe 8. The feeding pipe valve is a solenoid valve.

[0023] In this embodiment, a plurality of furnace body partitions 10 are provided in the inner cavity of the furnace body at intervals in the up and down direction. The furnace body partitions 10 divide the inner cavity of the furnace body into the heating flues. A flue communication opening 17 for communicating adjacent two layers of heating flues in the up and down direction is formed between the furnace body partition and the left or right side wall of the furnace body. The flue temperature control system further includes a flue communication opening adjusting device.

[0024] The flue communication opening adjusting device includes an adjusting valve 22 that is guided and movably assembled on the corresponding furnace wall in the left and right direction. The adjusting valve 22 is made of refractory plate material. The flue communication opening adjusting device further includes an adjusting valve actuator 6 arranged outside the furnace body corresponding to the adjusting valve one by one. In this embodiment, the adjusting valve actuator 6 is an electric push rod. The action output end 20 of the adjusting valve actuator is connected to the adjusting valve. The adjusting valve moves towards the corresponding furnace body partition to reduce the opening size of the flue communication opening 17. When the adjusting valve moves away from the corresponding furnace body partition, the adjusting valve can retract into the inner wall of the furnace body. At this time, the adjusting valve is not directly located in the heating flue, reducing the heat received by the adjusting valve.

[0025] One side of the adjusting valve away from the furnace body is connected with a valve joint 21 through a dovetail groove. The valve joint 21 is a metal structure. The action output end 20 of the adjusting actuator is hinged to the valve joint through a hinge shaft. The hinge shaft connection here has two functions. One is to increase the freedom of movement in a relatively conventional way and avoid stress concentration. The other is to reduce the contact area between the action output end and the valve joint, so as to reduce the heat transmitted to the action output end through the valve joint and avoid overheating of the adjusting actuator.

[0026] The periphery of the valve joint is covered with a heat insulation and sealing cover 5. The heat insulation and sealing cover 5 is a hollow structure. The hollow inner cavity of the heat insulation and sealing cover is filled with heat insulation material. One end of the heat insulation and sealing cover 5 is fixed on the outer wall of the furnace body, and the other end of the heat insulation and sealing cover is in guiding and moving cooperation with the action output end of the adjusting valve actuator. The main body of the adjusting valve actuator is fixed on the steel frame ( Figure 1On (not shown in the figure). The heat insulation and sealing cover 5 can reduce the heat loss problem caused by adjusting the gap between the regulating valve and the furnace body. At the same time, the heat insulation and sealing cover 5 also provides guidance for the movement of the action output end, avoiding the deviation of the action of the action output end, which may cause the regulating valve to not operate smoothly.

[0027] The regulating valve is used in the following situations. For example, when the temperatures of all the heating flues below the third-layer heating flue are higher than the set value, the size of the flue connection opening between the third-layer heating flue and the fourth-layer heating flue can be reduced through the regulating valve, and the gas supply to all the heating flues below the third-layer heating flue can be reduced, so as to reduce the temperatures of all the heating flues below the third-layer heating flue. When only the temperature of a certain layer of heating flue is too high, the temperature of that layer of heating flue can be reduced only by opening the flue air supply opening corresponding to that layer of heating flue, while paying attention to adjusting the temperatures of other layers of heating flues.

[0028] In the present invention, the flue is fixed to the right bottom of the furnace body. There are flue legs 15 at the bottom of the flue. The top height of the flue is not higher than the bottom height of the lowermost n - 1 layer of heating flues. Therefore, the flue will not interfere with the setting of the corresponding temperature measuring element 4, the flue air supply opening 7, and the gas supply pipe 16. Therefore, in the present invention, it can be set as follows: the gas inlet 1 is located at the right end of the first-layer heating flue. For the odd-layer flues, the temperature measuring element 4 is located at the left end of the corresponding odd-layer heating flue, and the gas supply pipe 16 is located at the right end of the corresponding odd-layer heating flue; for the even-layer flues, the temperature measuring element is located at the right end of the corresponding even-layer heating flue, and the gas supply pipe is located at the left end of the corresponding even-layer heating flue.

[0029] The advantage of such a setting is as follows: For example, when the flue air supply opening at the right end of the third-layer heating flue is opened, cold air enters through the third-layer heating flue and then moves from right to left. If the temperature measuring element of the third-layer heating flue is set at the right end of the third-layer heating flue, the cold air will easily affect the temperature measurement of the temperature measuring element, resulting in the temperature measuring element not being able to truly reflect the temperature of the third-layer heating flue. Similarly, when the feeding pipe 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 sufficient combustion along the entire length of the third-layer heating flue, the temperature measuring element of the third-layer heating flue measures the temperature at the left end of the third-layer heating flue, which also ensures the accuracy of temperature measurement.

[0030] Frame supports 28 are provided at each of the flue air supply openings 7. The air damper 29 is of a plate structure. The air damper 29 is assembled to move in a guiding manner in the front-rear direction on the corresponding frame support 28. The air damper 29 is blocked or opened corresponding flue air supply openings 7 by moving back and forth. Specifically, the upper and lower ends of the air damper are in guiding movement cooperation with the frame support in the front-rear direction.

[0031] An air door hole 35 running through the air door in the left - right direction is provided on the air door. A damper plate 27 with a rotation axis extending in the left - right direction is rotatably assembled on the outer side of the air door through an air door shaft 31. The air door shaft 31 is located below the air door hole 35. In this embodiment, the air door hole is of a fan - shaped hole structure, and the damper plate of the air door hole is of a fan - shaped plate structure with a size not less than that of the air door hole.

[0032] In this embodiment, the air door actuator 23 is an electric push rod. The action output rod of the electric push rod constitutes the action output end of the air door actuator. A first towing rope 25 is connected to the action output end of the air door actuator. The end of the first towing rope 25 far from the air door actuator is connected to the air door shaft 31. Specifically, the end of the first towing rope 31 far from the air door actuator is wound around the air door shaft 31. An air door hole damper return spring 30 is arranged between the damper plate 27 of the air door hole and the air door 29. An air door return structure is connected to the air door. In this embodiment, the air door return structure includes a second towing rope 33 connected to the air door, and a return weight 34 is connected to the lower end of the second towing rope 33. Item 24 in the figure respectively represents a deflection pulley for the corresponding towing rope to pass through for direction change.

[0033] A baffle stop 32 for limiting the opening limit of the damper plate of the air door hole is arranged on the outer side of the air door. When the damper plate 27 of the air door hole is blocked by the baffle stop 32, the end of the first towing rope 25 connected to the air door shaft 31 is horizontally arranged in the front - rear direction. In this way, when the first towing rope pulls the air door 29 to move forward, there will be no component force in other directions, and the movement of the air door is relatively smooth.

[0034] The air door, the damper plate of the air door hole, the door frame support, the air door actuator, the first towing rope, the air door return structure, the air door hole damper return spring and the baffle stop and their structural connection relationships together constitute a towing - type door temperature - regulating structure.

[0035] In actual use, a temperature threshold is set for each layer of heating flues. For example, the temperature thresholds are 980°C and 1030°C. When the temperature of the corresponding layer of heating flue is higher than 1030°C, the air inlet of the flue of the corresponding layer of heating flue needs to be opened to let in natural air (which can also be called cold air compared with the temperature in the furnace) to cool down the corresponding layer of heating flue. When the temperature is lower than 1030°C, the air inlet of the flue of the corresponding layer of heating flue is closed; when the temperature of the corresponding layer of heating flue is lower than 980°C, the gas supply pipe of the corresponding layer of heating flue needs to be opened for gas replenishment. When the temperature of the corresponding layer of heating flue is higher than 980°C, the gas supply pipe is closed; when the overall temperature of all the heating flues on the lower side of a certain layer of heating flue is too high, the regulating valve 22 of the corresponding layer of heating flue needs to be adjusted to reduce the opening size of the corresponding flue connection port. If the designed temperature still cannot be reached, cooling needs to be carried out through the air inlet of the flue of the corresponding layer; when the overall temperature of all the heating flues on the lower side of a certain layer of heating flue is too low, the opening size of the corresponding flue connection port needs to be increased. If the designed temperature still cannot be reached, gas needs to be replenished through the gas supply pipe of the corresponding layer. Finally, each layer of heating flue can be independently adjusted, so that the temperatures of the heating flues at all positions in the front-back direction and at each layer of heating flue in the height direction are all within the set temperature range.

[0036] In this embodiment, the temperature measuring element monitors the temperature of each layer of heating flue in real time. Therefore, when the temperature of the heating flue is slightly higher than the set temperature, the air door actuator may act. At this time, if the air door directly moves back and forth to open the air inlet of the flue, the opening size of the air inlet of the flue will be too large, resulting in too much cold air entering and the temperature of the corresponding layer of heating flue dropping too fast. Therefore, in the present invention, before the air door moves as a whole, the air door holes on the air door are first opened through the first towing rope to achieve small air volume adjustment. When the temperature cannot be quickly reduced even when all the air door holes are opened, the air door then moves as a whole to open the movable air inlet to achieve rapid cooling of the corresponding layer of heating flue.

[0037] When the damper actuator works specifically, the action output rod of the damper actuator extends. Since the reset force of the damper reset structure on the damper is greater than the reset force of the damper orifice baffle reset spring on the damper orifice baffle, when the first drag rope starts to pull, the damper will not move back and forth. The damper shaft drives the damper orifice baffle to rotate, and gradually starts to open the damper orifice. As the damper orifice baffle continues to rotate, when the damper orifice baffle is blocked by the baffle stop block, the damper orifice is opened to the maximum. At this time, the damper orifice baffle cannot continue to rotate. When the first drag rope continues to pull, the entire damper can move forward to gradually open the flue air supply port, and the opening size of the flue air supply port is larger than the opening size of the damper orifice. When it is necessary to close the flue air supply port, the action output rod of the damper actuator retracts. Under the action of the damper reset structure, the damper moves backward to reset. There is a stop block (not shown in the figure) on the door frame bracket for limiting the maximum backward movement of the damper. Under the action of the damper orifice baffle reset spring, the damper orifice baffle rotates to reset.

[0038] An embodiment 2 of a pot type calciner is as Figure 7 shown. The difference between embodiment 2 and embodiment 1 is that in this embodiment, a potentiometer 36 is further included, which is arranged in parallel with the damper actuator 23. The measuring rod 37 of the potentiometer is connected to the action output rod 38 of the damper actuator. The potentiometer can be used to detect the moving distance of the action output rod of the damper actuator, so as to facilitate the control of the pulling length of the first drag rope 25.

[0039] An embodiment 3 of a pot type calciner is as Figure 8 shown: The difference between embodiment 3 and embodiment 1 is that the damper actuator includes a wire reel 40 driven by a motor 39, and the first drag rope 25 is wound around the wire reel 40.

[0040] In the above description of this specification, unless otherwise clearly specified and limited, terms such as "fixed", "installed", "connected" or "coupled" should be understood in a broad sense. For example, for the term "connected", it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. Therefore, unless this specification clearly limits otherwise, those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

[0041] Based on the above description of this specification, those skilled in the art can also understand the terms used as follows, 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", etc. The terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of this specification. It is only for the purpose of facilitating the description of the solution of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or component involved must have the specific orientation, be constructed and operate in the specific orientation. Therefore, the above terms of orientation or positional relationship cannot be understood or interpreted as a limitation to the solution of the present invention.

[0042] In addition, the terms "first" or "second", etc. used in this specification to refer to numbers or ordinals are only for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this specification, "a plurality of" means at least two, such as two, three or more, etc., unless otherwise specifically defined.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A traction door temperature control structure, comprising a door frame bracket and a damper actuator, characterized in that: A damper for blocking or opening the air inlet of a corresponding flue is assembled on the upper edge of the doorframe support and is guided to move in the front-rear direction. A damper hole is provided on the damper. The outer side of the damper is rotatably assembled with a damper hole baffle whose rotation axis extends in the left-right direction through a damper shaft. A first drag rope is connected to the action output end of the damper actuator. The end of the first drag rope far 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 drag 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 drag rope to open the flue air inlet.

2. The drag-type door temperature adjustment structure according to claim 1, wherein: The damper return structure includes a second drag rope connected to the damper, and a return weight is connected to the lower end of the second drag rope.

3. The drag-type door temperature control structure according to claim 1, characterized in that: The damper hole is of a sector hole structure, and the damper hole baffle is of a sector plate structure with a size not less than that of the damper hole.

4. The drag-type door temperature control structure according to claim 1, characterized in that: A baffle stop for limiting the opening limit of the damper hole baffle is provided on the outer side of the damper. When the damper hole baffle is blocked by the baffle stop, the end of the first drag rope connected to the damper shaft is horizontally arranged in the front-rear direction.

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

6. A pot type calciner, comprising at least two heating flues arranged sequentially in the front-rear direction, with a calcining pot between adjacent heating flues. The heating flue includes a furnace body, and multiple layers of heating flues arranged in an S shape and communicating sequentially from top to bottom are formed in the furnace body. A gas feed port is communicated with the uppermost layer of heating flue, and a flue is communicated with the lowermost layer of flue. It is characterized in that: Temperature measuring elements are provided in each layer of heating flue. A flue air inlet is also connected to each layer of heating flue. A damper capable of being opened or closed is provided at the flue air inlet. The damper is guided to move in the front-rear direction and is assembled on a damper frame. The damper is driven by a damper actuator. A damper hole is provided on the damper. The outer side of the damper is rotatably assembled with a damper hole baffle whose rotation axis extends in the left-right direction through a damper shaft. A first drag rope is connected to the action output end of the damper actuator. The end of the first drag rope far 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 drag 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 drag rope to open the flue air inlet.

7. The pot type calciner according to claim 6, characterized in that: The flue temperature control system further includes a gas feeding system. The gas feeding system includes gas feeding pipes respectively communicating with each layer of heating flue, and a feeding pipe valve is provided on each gas feeding pipe.

8. The pot type calciner according to claim 6, characterized in that: The damper return structure includes a second drag rope connected to the damper, and a return weight is connected to the lower end of the second drag rope.

9. The pot type calciner according to claim 6, wherein: The damper hole is of a sector hole structure, and the damper hole baffle is of a sector plate structure with a size not less than that of the damper hole.

10. The pot type calciner according to any one of claims 6 to 9, characterized in that: A baffle stop for limiting the opening limit of the damper hole baffle is provided on the outer side of the damper. When the damper hole baffle is blocked by the baffle stop, the end of the first drag rope connected to the damper shaft is horizontally arranged in the front-rear direction.

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