An overfire tube device for connecting a kiln body and a heat source

Abstract

The present invention discloses an overfire tube device for connecting a kiln body and a heat source, which relates to the technical field of drying kilns. The present invention includes an overfire tube body, a first flange, a second flange and a heat preservation cylinder. The first flange and the second flange are respectively threadedly connected to the inlet end and the outlet end of the overfire tube body. The overfire tube body is composed of an outer cylinder and an inner cylinder. A heat preservation cylinder is arranged in the interlayer between the outer cylinder and the inner cylinder. A filling hole is formed in the heat preservation cylinder, and fireproof cotton is filled in the filling hole. A lifting member is erected in the middle upper side wall of the overfire tube body, and the bottom side wall of the lifting member is connected to a blocking member through a lifting member. By using the overfire tube with a double-layer cylinder structure internally equipped with a heat preservation cylinder, the present invention can improve the heat preservation effect of the overfire tube body and reduce heat energy loss; and through the cooperation of the lifting member and the lifting member, the height of the blocking member in the overfire tube body can be adjusted, which can not only block the heat source transmission, but also adjust the heat source transmission amount.

Description

Technical Field

[0001] The present invention belongs to the technical field of drying kilns, and particularly relates to an overfire tube device for connecting a kiln body and a heat source. Background Art

[0002] In large-scale industrial production activities, the drying process mainly relies on drying kilns. A large amount of materials can be dried at one time using a drying kiln, with a fast drying speed, and cyclic drying work can also be achieved. The drying kiln mainly consists of a kiln body, a material rack, a transportation mechanism, a air supply mechanism, and a heat source generation system. Among them, the kiln body is connected to the heat source generation system through an overfire tube to avoid the difficulty of controlling the heat source output and the excessive contact temperature when the heat source generation system is directly connected to the kiln body, which may cause deformation of the accessories on the kiln body due to over-temperature.

[0003] The existing published document, CN115950225A - An energy-saving drying kiln and its system, discloses an energy-saving drying kiln and its system, including a heating furnace, an overfire tube cylinder body, a dryer cylinder body, a limit support device, and a transmission support device. An overfire tube cylinder body is fixedly installed at the opening on one side of the heating furnace. A dryer cylinder body is provided at the end of the overfire tube cylinder body away from the heating furnace, and a limit support device is provided at the end of the dryer cylinder body away from the overfire tube cylinder body. The dryer cylinder body is rotatably connected to both the overfire tube cylinder body and the limit support device. In the present invention, through the central tube, the inner and outer cylinder connecting plates, and the first material lifting plate, the space between the dryer cylinder body and the central tube is evenly divided into six independent spaces. With the guiding effect of the spiral guiding plate, the heat flow and material distribution in the dryer cylinder body are more uniform, thereby improving the drying effect. And with the bent material lifting plate, the material lifting effect during the operation of the drying kiln is increased, the crushing rate of carbon materials is reduced, and the drying amount of carbon materials is increased. However, the above-mentioned energy-saving drying kiln and its system have the following deficiencies during actual use;

[0004] 1. For the overfire tube in the above drying kiln, the overfire tube cylinder body directly contacts the body of the heating furnace through a flange to send heat energy into the heating furnace. The overfire tube is a straight cylinder structure made of metal material, and its metal texture has fast heat transfer. Therefore, during the heat transfer process, a large amount of heat energy generated by the heat source generation system will directly overflow into the surrounding environment of the cylinder body through the overfire tube, resulting in resource loss.

[0005] 2. For the overfire tube in the above drying kiln, the overfire tube has a straight cylinder structure and is equipped with flanges at both ends, and does not have any heat source blocking structure. Therefore, the heat source input work can only be stopped by stopping the operation of the heat source generation system. However, even if the heat source generation system stops working, it can still generate heat energy within a certain period of time and input it into the drying kiln through the overfire tube. Therefore, the heat source input work cannot be cut off. Summary of the Invention

[0006] The object of the present invention is to provide a flue pipe device for connecting a kiln body and a heat source. By using a flue pipe with a double-layer cylinder structure internally equipped with a heat preservation cylinder, the heat preservation effect of the flue pipe body can be improved and heat energy loss can be reduced; and through the cooperation of a lifting member and a pulling member, the height of the blocking member in the flue pipe body can be adjusted, which can not only block the heat source transmission, but also adjust the heat source transmission amount, and solve the problems that occur in the flue pipe in the above-mentioned drying kiln.

[0007] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0008] The present invention is a flue pipe device for connecting a kiln body and a heat source, including a flue pipe body, a first flange, a second flange and a heat preservation cylinder. The first flange and the second flange are respectively threadedly connected to the inlet end and the outlet end of the flue pipe body. The flue pipe body is composed of an outer cylinder and an inner cylinder. A heat preservation cylinder is arranged in the interlayer between the outer cylinder and the inner cylinder. A filling hole is opened on the heat preservation cylinder, and fireproof cotton is filled in the filling hole. A lifting member is erected in the upper side wall of the middle part of the flue pipe body, and the bottom side wall of the lifting member is connected to a blocking member through a pulling member. The blocking member is embedded in the upper side wall of the flue pipe body and extends into the interior of the flue pipe body;

[0009] Among them, both ends of the lifting frame in the lifting member are connected to the upper side wall of the flue pipe body through fixing blocks; both ends of the electric lifting rod in the pulling member are respectively connected to the bottom side wall of the lifting frame and a cover plate through fixing rings, and the cover plate is installed on the upper side wall of the blocking plate in the blocking member. A cooling plate is placed inside the blocking plate, and both sides of the blocking plate are respectively connected to a first fireproof plate and a second fireproof plate through bolts.

[0010] Further, an insertion groove is opened in the upper side wall at the center point position of the flue pipe body, and a mating groove is cast in the side wall of the heat preservation cylinder corresponding to the insertion groove. The inner side walls of the insertion groove and the mating groove are in fit connection with the outer wall of the blocking plate in the blocking member.

[0011] Further, the thickness of the outer cylinder is the same as that of the inner cylinder, and both ends of the outer cylinder are connected to the inner cylinder through connecting columns. The connecting columns are respectively connected to the outer cylinder and the inner cylinder through bolts.

[0012] Further, a heat preservation groove is arranged between the outer cylinder and the inner cylinder. The inner side wall of the heat preservation groove is in close contact with the outer side wall of the heat preservation cylinder. A plurality of filling holes are opened in the side wall of the heat preservation cylinder, and the filling holes are arranged in an annular array structure.

[0013] Further, the lifting member is erected directly above the insertion groove, and the pulling member is arranged in a coaxial plane structure with the insertion groove. There are two electric lifting rods in the pulling member, and the two electric lifting rods are symmetrically arranged on both sides of the center point of the insertion groove.

[0014] Furthermore, fixing rings are respectively and fixedly installed on the side walls at both ends of the electric lifting rod. A sealing plate is welded on the bottom side wall of the cover plate at the bottom of the electric lifting rod. The cover plate is connected to the upper side wall of the blocking plate by bolts, and the outer peripheral side wall of the sealing plate is fitted with the inner wall of the cooling groove in the blocking plate.

[0015] Furthermore, the cooling groove is arranged at the inner center of the blocking plate. Clamping grooves are formed on both side walls of the blocking plate. The cooling plate is placed inside the cooling groove, and the first fireproof plate and the second fireproof plate are arranged inside the clamping grooves.

[0016] Furthermore, the height of the cooling plate is greater than the diameter of the inner cylinder, and the widths of the first fireproof plate and the second fireproof plate are greater than the diameter of the inner cylinder. The bottom side wall of the bottom plate of the blocking plate is attached to the inner bottom wall of the inner cylinder, and the top side wall of the blocking plate extends out of the upper side wall of the outer cylinder.

[0017] The present invention has the following beneficial effects:

[0018] 1. By providing the fire-passing cylinder body and the heat-insulating cylinder, during use, the fire-passing cylinder body of the present invention adopts a two-layer structure of an outer cylinder and an inner cylinder, and a heat-insulating cylinder is filled in the gap between the two cylinders. The inner cylinder is connected to the outer cylinder through the heat-insulating cylinder. Among them, the heat-insulating cylinder is made of asbestos material and is provided with a plurality of filling holes inside, and each filling hole is filled with fireproof cotton, so as to improve the heat-insulating effect of the heat-insulating cylinder and reduce the weight. The double-layer cylinder structure can reduce the heat exchange speed between the heat generated in the heat source generation system and the fire-passing cylinder body, so that more heat energy can enter the kiln body through the fire-passing cylinder body, thereby achieving the effect of reducing the loss speed of heat energy resources, and solving the problem that in the fire-passing cylinder of the above-mentioned drying kiln, the fire-passing cylinder body is directly in contact with the body of the heating furnace through a flange to send heat energy into the heating furnace, and the fire-passing cylinder is a straight cylinder structure made of metal material, and the metal texture has fast heat transfer, so a large amount of heat energy generated by the heat source generation system will directly overflow around the cylinder through the fire-passing cylinder during the heat transfer process, resulting in resource loss.

[0019] 2. By providing a lifting member and a blocking member, during use, the blocking assembly can be lifted above the middle of the overfire tube body through the lifting assembly, and the blocking member can be pulled out or lowered through the lifting member. When the blocking member is lowered into the overfire tube body, the inner cavity of the overfire tube body is blocked, achieving the effect of stopping the heat source input. Conversely, it achieves the effect of opening the heat source input, and the input speed can also be adjusted by adjusting the depth of the lower part of the blocking member. Among them, the inside of the blocking plate in the blocking member is filled with a cooling plate, which can ensure that the inner core of the cooling plate remains at a low temperature, preventing the blocking plate from heating up too quickly after being directly impacted by the heat source and affecting the blocking operation. At the same time, the fireproof plates inlaid on both sides of the blocking plate can improve the fireproof performance of the blocking plate and also reduce the heat exchange speed between the heat source generated by the heat source generation system and the blocking plate, solving the problem that the overfire tube in the drying kiln is in a straight tube structure with flanges assembled at both ends, and the heat source input can only be stopped by stopping the operation of the heat source generation system. However, even if the heat source generation system stops working, it can still generate heat energy within a certain period of time and input it into the drying kiln through the overfire tube. Therefore, the heat source input cannot be completely cut off.

[0020] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 FIG. is a schematic structural diagram of an overfire tube device connecting a kiln body and a heat source;

[0023] Figure 2 FIG. is a half-sectional view of the structure of an overfire tube device connecting a kiln body and a heat source;

[0024] Figure 3 FIG. is an exploded view of the structures of the overfire tube body and the insulation cylinder;

[0025] Figure 4 FIG. is Figure 3 an enlarged view of the structure at A in

[0026] Figure 5 FIG. is an exploded view of the structures of the lifting member, the lifting member, and the blocking member.

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] 1. Fire tube body; 101. Outer cylinder; 1011. Insertion groove; 102. Inner cylinder; 103. Connecting column; 104. Heat preservation groove; 2. First flange; 3. Second flange; 4. Heat preservation cylinder; 401. Filling hole; 402. Fireproof cotton; 403. Matching groove; 5. Lifting piece; 501. Fixed block; 502. Lifting frame; 6. Lifting piece; 601. Electric lifting rod; 602. Fixed ring; 603. Cover plate; 604. Sealing plate; 7. Blocking piece; 701. Blocking plate; 7011. Cooling groove; 7012. Clamping groove; 702. Cooling plate; 703. First fireproof plate; 704. Second fireproof plate. Detailed implementation mode

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.

[0030] Embodiment 1

[0031] Please refer to Figures 1 to 5 As shown in the figure, the present invention is a fire tube device for connecting a kiln body and a heat source, including a fire tube body 1, a first flange 2, a second flange 3 and a heat preservation cylinder 4. The first flange 2 and the second flange 3 are respectively threadedly connected to the inlet end and the outlet end of the fire tube body 1. The fire tube body 1 is composed of an outer cylinder 101 and an inner cylinder 102. A heat preservation cylinder 4 is arranged in the interlayer between the outer cylinder 101 and the inner cylinder 102. The heat preservation cylinder 4 is provided with a filling hole 401, and the filling hole 401 is filled with fireproof cotton 402. A lifting piece 5 is erected in the middle upper side wall of the fire tube body 1, and the bottom side wall of the lifting piece 5 is connected to a blocking piece 7 through a lifting piece 6. The blocking piece 7 is embedded in the upper side wall of the fire tube body 1 and extends into the interior of the fire tube body 1;

[0032] Among them, both ends of the lifting frame 502 in the lifting piece 5 are connected to the upper side wall of the fire tube body 1 through fixed blocks 501; both ends of the electric lifting rod 601 in the lifting piece 6 are respectively connected to the bottom side wall of the lifting frame 502 and the cover plate 603 through fixed rings 602, and the cover plate 603 is installed in the upper side wall of the blocking plate 701 in the blocking piece 7. A cooling plate 702 is placed inside the blocking plate 701, and both sides of the blocking plate 701 are respectively connected to a first fireproof plate 703 and a second fireproof plate 704 through bolts.

[0033] Please refer to Figures 1 to 2As shown, an insertion groove 1011 is formed in the upper side wall at the center point position of the fire tube body 1, and a mating groove 403 is formed in the side wall of the heat preservation cylinder 4 corresponding to the insertion groove 1011. The inner side walls of the insertion groove 1011 and the mating groove 403 are fitted and connected with the outer wall of the blocking plate 701 in the blocking member 7. Specifically, the blocking plate 701 enters the mating groove 403 through the insertion groove 1011 to achieve the effect of blocking the chambers on both sides of the insertion groove 1011 and the mating groove 403.

[0034] Please refer to Figure 3 As shown, a heat preservation groove 104 is provided between the outer cylinder 101 and the inner cylinder 102. The inner side wall of the heat preservation groove 104 is fitted with the outer side wall of the heat preservation cylinder 4. Specifically, when the heat preservation cylinder 4 is assembled in the heat preservation groove 104, it can enhance the heat preservation effect on the fire tube body 1. A plurality of filling holes 401 are formed in the side wall of the heat preservation cylinder 4, and the filling holes 401 are arranged in an annular array structure. Specifically, the filling holes 401 are used to fill the fireproof cotton 402. The fireproof cotton 402 can not only prevent high-temperature fires from occurring, but also reduce the weight of the heat preservation cylinder 4 and improve the heat preservation performance.

[0035] Please refer to Figure 4 As shown, the thickness of the outer cylinder 101 is the same as that of the inner cylinder 102, and the side walls at both ends of the outer cylinder 101 are connected to the inner cylinder 102 through the connecting columns 103. The connecting columns 103 are connected to the outer cylinder 101 and the inner cylinder 102 through bolts respectively. Specifically, after the connecting columns 103 are connected to the outer cylinder 101 and the inner cylinder 102, they can stably connect the two and prevent the two from fitting together to form a chamber between them.

[0036] Please refer to Figure 5As shown, the lifting member 5 is installed directly above the insertion groove 1011. The lifting member 6 is arranged coaxially with the insertion groove 1011. There are two electric lifting rods 601 in the lifting member 6, and the two electric lifting rods 601 are symmetrically arranged on both sides of the center point of the insertion groove 1011. Fixed rings 602 are fixedly installed on the side walls at both ends of the electric lifting rod 601. The two fixed rings 602 are used to fix both ends of the electric lifting rod 601. A sealing plate 604 is welded on the bottom side wall of the cover plate 603 at the bottom of the electric lifting rod 601. The cover plate 603 is connected to the upper side wall of the blocking plate 701 by bolts, and the outer peripheral side wall of the sealing plate 604 is fitted with the inner wall of the cooling groove 7011 in the blocking plate 701. Specifically, when the cover plate 603 covers the blocking plate 701, the sealing plate 604 at its bottom fits with the inner wall of the cooling groove 7011, thereby sealing the upper notch of the cooling groove 7011. The cooling groove 7011 is arranged at the center of the interior of the blocking plate 701, and clamping grooves 7012 are formed on both side walls of the blocking plate 701. The cooling plate 702 is placed inside the cooling groove 7011, and the first fireproof plate 703 and the second fireproof plate 704 are arranged inside the clamping grooves 7012. Specifically, the clamping grooves 7012 provide a receiving and clamping effect on the first fireproof plate 703 and the second fireproof plate 704, and bolts are used to lock them to prevent the first fireproof plate 703 and the second fireproof plate 704 from detaching from the blocking plate 701. The height of the cooling plate 702 is greater than the diameter of the inner cylinder 102, and the widths of the first fireproof plate 703 and the second fireproof plate 704 are greater than the diameter of the inner cylinder 102. The bottom side wall of the blocking plate 701 fits with the bottom inner wall of the inner cylinder 102, and the top side wall of the blocking plate 701 extends out of the upper side wall of the outer cylinder 101.

[0037] Embodiment 2

[0038] Based on the overfire tube device for connecting the kiln body and the heat source described in Embodiment 1, during use, the overfire tube body 1 is connected to the heat outlet of the heat source generation system through the first flange 2 and to the heat inlet end of the kiln body through the second flange 3; when heat needs to be input into the kiln body, the electric lifting rod 601 in the lifting member 6 is used to pull the blocking plate 701 at the bottom of the blocking member 7 to move upward, that is, the gap between the bottom of the blocking plate 701 and the bottom inner wall of the inner cylinder 102 gradually expands, so that the internal cavity of the overfire tube body 1 is in a communicating state, and as the gap continuously expands, the input amount of heat energy also continuously expands until the bottom side wall of the blocking plate 701 disengages from the insertion groove 1011 on the inner cylinder 102; conversely, when the blocking member 7 moves down into the overfire tube body 1, the inner cavity of the overfire tube body 1 is blocked, achieving the effect of stopping the input of the heat source. When the blocking plate 701 closes the internal cavity of the overfire tube body 1, the first fireproof plate 703 and the second fireproof plate 704 on both sides of the blocking plate 701 can first receive the heat energy impact of the heat source, avoiding the phenomenon of a sharp increase in the temperature of the blocking plate 701. At the same time, the cooling plate 702 inside it can slow down the heating rate of the blocking plate 701.

[0039] The above are only the preferred embodiments of the present invention and do not limit the present invention. Any modification of the technical solutions recorded in the foregoing embodiments, any equivalent replacement of some technical features, and any modification, equivalent replacement, or improvement made shall fall within the protection scope of the present invention.

Claims

1. An overfire tube device for connecting a kiln body and a heat source, comprising an overfire tube body (1), a first flange (2), a second flange (3) and a heat preservation cylinder (4). The first flange (2) and the second flange (3) are respectively threadedly connected to the inlet end and the outlet end of the overfire tube body (1), and are characterized in that: The overfire tube body (1) is composed of an outer cylinder (101) and an inner cylinder (102). A heat preservation cylinder (4) is arranged in the interlayer between the outer cylinder (101) and the inner cylinder (102). An insertion groove (1011) is formed in the upper side wall at the center point position of the overfire tube body (1), and a matching groove (403) is arranged in the side wall of the heat preservation cylinder (4) corresponding to the insertion groove (1011). The inner side walls of the insertion groove (1011) and the matching groove (403) are cooperatively connected with the outer wall of a blocking plate (701) in a blocking member (7). A heat preservation groove (104) is arranged between the outer cylinder (101) and the inner cylinder (102), and the inner side wall of the heat preservation groove (104) is attached to the outer side wall of the heat preservation cylinder (4). A plurality of filling holes (401) are formed in the side wall of the heat preservation cylinder (4), and the filling holes (401) are arranged in an annular array structure. Fireproof cotton (402) is filled in the filling holes (401). A hoisting member (5) is erected on the upper side wall in the middle of the overfire tube body (1), and the bottom side wall of the hoisting member (5) is connected with the blocking member (7) through a lifting member (6). The blocking member (7) is embedded in the upper side wall of the overfire tube body (1) and extends into the interior of the overfire tube body (1); Among them, the hoisting member (5) is erected directly above the insertion groove (1011), and both ends of a hoisting frame (502) in the hoisting member (5) are connected with the upper side wall of the overfire tube body (1) through fixing blocks (501); The lifting member (6) is arranged in a coaxial plane structure with the insertion groove (1011). Both ends of an electric lifting rod (601) in the lifting member (6) are respectively connected with the bottom side wall of the hoisting frame (502) and a cover plate (603) through fixing rings (602). Fixing rings (602) are fixedly installed on both side walls at both ends of the electric lifting rod (601). Two electric lifting rods (601) are provided in the lifting member (6), and the two electric lifting rods (601) are symmetrically arranged on both sides of the center point of the insertion groove (1011). A sealing plate (604) is welded on the bottom side wall of the cover plate (603) at the bottom of the electric lifting rod (601); The cover plate (603) is installed in the upper side wall of the blocking plate (701) in the blocking member (7). The cover plate (603) is connected to the upper side wall of the blocking plate (701) by bolts, and the outer peripheral side wall of the sealing plate (604) is fitted with the inner wall of the cooling groove (7011) in the blocking plate (701). A cooling plate (702) is placed inside the blocking plate (701), and both sides of the blocking plate (701) are connected to the first fireproof plate (703) and the second fireproof plate (704) by bolts respectively. The cooling groove (7011) is arranged at the center inside the blocking plate (701), and clamping grooves (7012) are formed on both side walls of the blocking plate (701). The cooling plate (702) is placed inside the cooling groove (7011), and the first fireproof plate (703) and the second fireproof plate (704) are arranged inside the clamping grooves (7012).

2. The overfire tube device for connecting the kiln body and the heat source according to claim 1, characterized in that: The thickness of the outer cylinder (101) is the same as that of the inner cylinder (102), and both end side walls of the outer cylinder (101) are connected to the inner cylinder (102) through connecting columns (103). The connecting columns (103) are connected to the outer cylinder (101) and the inner cylinder (102) by bolts respectively.

3. The overfire tube device for connecting the kiln body and the heat source according to claim 1, characterized in that: The height of the cooling plate (702) is greater than the diameter of the inner cylinder (102), and the widths of the first fireproof plate (703) and the second fireproof plate (704) are greater than the diameter of the inner cylinder (102). The bottom side wall of the blocking plate (701) is attached to the bottom inner wall of the inner cylinder (102), and the top side wall of the blocking plate (701) extends out of the upper side wall of the outer cylinder (101).

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