Furnace flame heat radiation tube based on medium combustion and its connection structure

Abstract

The present invention belongs to the technical field of industrial heating boilers, and discloses a furnace flame heat radiation tube based on medium combustion and its connection structure, including a straight radiation tube and a medium radiation tube, wherein the straight radiation tube is arranged on the inner wall of the furnace, and the medium radiation tube is arranged inside the straight radiation tube, and the two are placed along the same central axis. The above scheme can expand the combustion flame of the industrial heating boiler by periodically distributing a plurality of through holes on the medium radiation tube, so that the combustion flame is in a medium combustion state, so that more heat rays can be transmitted to the outside through the through holes on the medium radiation tube for directional heat radiation, and can be continuously and stably directional irradiated to the boiler heating pipe, which can improve the boiler flame, especially the thermal radiation stability and heat transfer efficiency of the flame tail end, thereby improving the overall effective radiation efficiency of the boiler, and having a higher radiation heat transfer effect.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial heating boilers, and in particular is a furnace flame heat radiation tube based on medium combustion and a connection structure thereof. Background Art

[0002] Generally, for industrial boilers with centralized heating as a typical application, the boiler burner and combustion flame are located on the central axis of the industrial boiler furnace, and the heating pipes are extended and coiled around the inner wall of the industrial boiler furnace and are heated by the combustion flame and high-temperature flue gas along the central axis. The combustion flame located on the central axis of the boiler furnace mainly transfers heat to the heated workpiece or pipe located on the peripheral wall of the furnace by radiation, so it is often called an industrial radiation furnace.

[0003] When an industrial boiler is working, the furnace flame will generate a large amount of heat radiation during combustion, which is absorbed by the heating pipes placed around the inner wall of the furnace. However, since the flame is in a free combustion state during the combustion process, especially for the tail end of the flame, it is more susceptible to the impact of the combustion-supporting airflow and becomes very unstable, resulting in a decrease in the heat absorption efficiency of the heating pipes around the furnace.

[0004] Medium combustion is a process of combustion, heat exchange and heat transfer in porous medium materials. Due to the presence of porous media, most of the heat generated in the combustion area can be effectively refluxed and directed, thus ensuring the stability of combustion and increasing the combustion load adjustment range.

[0005] Therefore, in order to improve and optimize existing industrial boilers, especially boilers using oil and gas as fuel, the tail end of the burning flame in the furnace is more easily affected by the scouring of the combustion-supporting gas flow and becomes unstable during operation. Therefore, a furnace flame heat radiation tube based on medium combustion and its connection structure are proposed, which improves the free boundary radiation emission surface of the burning flame into a constrained directional radiation emission surface, thereby improving the overall heat transfer efficiency of the boiler furnace flame in the entire path of heat radiation transfer from the flame's heat radiation emission surface to the surrounding heated pipes of the furnace, thereby achieving energy saving of industrial boilers. Summary of the invention

[0006] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a furnace flame heat radiation tube based on medium combustion and its connection structure, which solves the problem that the flame in the boiler furnace will become very unstable due to the scouring of the combustion-supporting airflow, thereby causing the heat absorption efficiency of the heating pipes around the boiler furnace to be relatively low.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a furnace flame heat radiation tube based on medium combustion, including a straight radiation tube and a dielectric radiation tube, the straight radiation tube is arranged on the inner wall of the boiler furnace, the dielectric radiation tube is sleeved inside the straight radiation tube, and the dielectric radiation tube is provided with through holes in an annular array and periodically, and at the same time, the straight radiation tube and the dielectric radiation tube are placed together along the central axis of the boiler.

[0008] Preferably, the interior of the dielectric radiation tube is a hollow porous structure, and the through holes on the dielectric radiation tube are square or circular, the total sum of the through holes on the dielectric radiation tube occupies at least fifty percent of the surface area of ​​the dielectric radiation tube, and the sum of the internal surface areas of each through hole is at least greater than six times the area of ​​each through hole.

[0009] Preferably, the straight radiant tube can be designed to be integrated with the inner wall of the boiler furnace, so as to optimize the overall structure of the boiler and shorten the transfer path of radiation heat transfer.

[0010] The connection structure is suitable for furnace flame heat radiation tubes based on medium combustion.

[0011] Preferably, it comprises a connecting block, the connecting block is fixed to one end of the straight radiant tube by bolts, the connecting block is used to connect the straight radiant tube and the dielectric radiant tube, and further comprises:

[0012] A supporting assembly, which is movably connected to one end of the connecting block located inside the straight radiation tube; a fixing assembly, which is arranged in a circumferential array inside the connecting block and is used to clamp one end of the dielectric radiation tube;

[0013] The connecting block comprises a circumferential array of limiting channels and pipes provided on the connecting block, and a first protruding column is fixedly connected to one end of the inner wall of the pipe;

[0014] The support assembly includes a support block arranged on one side of the connection block, a limiting cross bar which can be inserted into the connection block is fixedly connected to the support block, a threaded rod is movably connected inside the pipe, one end of the threaded rod extends out of the pipe and is movably connected to the support block, and a spiral groove is provided on the threaded rod, a first slider located inside the support block is threadedly connected to the threaded rod, a second slider is movably connected outside the first slider, a first straight groove is provided on the second slider, a second convex column which can slide inside the first straight groove is fixedly connected to the first slider, and a hollow clamp is also fixedly connected to the second slider;

[0015] The first protruding column is movably connected to the inside of the spiral groove; the inside of the connecting block is also fixedly connected with a magnet for attracting the threaded rod.

[0016] Preferably, the diameter of the inner wall of the end of the support block away from the fixing assembly is smaller than the diameter of the outer wall of the dielectric radiation tube, the diameter of the support block is smaller than the inner wall diameter of the threaded rod, the portion of the connecting block located inside the straight radiation tube (2) is interference fit with the inner wall of the straight radiation tube, the diameter of the support block is smaller than the inner wall diameter of the straight radiation tube, and the outer circumferential array of the support block has balls that contact the inner wall of the straight radiation tube and are used to keep the straight radiation tube coaxial with the support assembly.

[0017] Preferably, the spiral groove is divided into a spiral segment and an adjacent and connected straight segment, the first convex column line moves in the spiral segment to force the threaded rod to rotate one circle and then disengage from the spiral groove from the straight segment, the end of the straight segment of the spiral groove is trumpet-shaped, the end of the limiting channel close to the support block is trumpet-shaped, and the end of the limiting cross rod away from the support block is conical.

[0018] Preferably, the fixing assembly includes a connecting frame fixedly connected to the inside of the connecting block and located outside the straight radiation tube; a bracket fixedly connected to the middle of the connecting frame; an elastic block elastically connected to one end of the bracket; a U-shaped clamping block movably connected to the bottom of the connecting frame; a lever movably connected to the inside of the U-shaped clamping block and having pins at both ends passing through the U-shaped clamping block and hinged to the connecting frame;

[0019] The middle part of the elastic block is movably connected with the top end of the lever, and after one end of the dielectric radiation tube penetrates into the connection block, the outer wall of the dielectric radiation tube presses the elastic block upward and causes the lever to rotate clockwise, thereby causing the U-shaped clamp block to move upward;

[0020] When the other end of the dielectric radiation tube enters the straight radiation tube and passes over the elastic block, the bottom end of the elastic block loses support and moves due to its own elastic force, so that the elastic block drives the U-shaped clamp block downward through the lever to clamp and fix the dielectric radiation tube.

[0021] Preferably, the U-shaped clamping block includes a second straight groove and a third straight groove opened thereon;

[0022] The bottom end of the lever is also fixedly connected to a third boss that can slide inside the second straight groove. The pin at the bottom end of the lever is movably connected to the top of the third straight groove, and the line connecting the pin at the bottom end of the lever and the third boss is perpendicular to the horizontal direction.

[0023] Preferably, one end of the connection block is movably connected with a collar, and the inner wall diameter of the collar is equal to the inner wall diameter of the connection block and the outer wall diameter of the dielectric radiation tube.

[0024] Preferably, the ends of the elastic block and the U-shaped clamping block away from the bracket respectively penetrate the collar and the connecting block, and extend into the channels inside the collar and at the axis of the connecting block respectively.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The above scheme can expand the combustion flame of the industrial heating boiler by periodically distributing multiple through holes on the dielectric radiation tube, so that the combustion flame is in a dielectric combustion state, so that more heat rays can be transmitted to the outside through the through holes on the dielectric radiation tube for directional heat radiation, and can be continuously and stably directional irradiated to the boiler heating pipe, which can improve the thermal radiation stability and heat transfer efficiency of the boiler flame, especially the flame tail end, thereby improving the overall effective radiation efficiency of the boiler, and having a higher radiation heat transfer effect;

[0027] The above scheme can prevent the problem of deformation of the dielectric radiation tube due to lack of support at one end of the straight radiation tube by the cooperation between the threaded rod, the first slider, the second slider and the hollow clamping block, and the dielectric radiation tube pushes the support block to move axially. At this time, the first protrusion limits the spiral groove, thereby forcing the threaded rod to rotate and push the first slider to move in the support block. At this time, the second protrusion slides in the first straight groove and forces the second slider to drive the hollow clamping block to move toward the dielectric radiation tube and clamp the dielectric radiation tube. When the threaded rod is separated from the connecting block, the support assembly as a whole can move synchronously with the dielectric radiation tube, thereby ensuring that the straight radiation tube and the inner wall of the dielectric radiation tube are always coaxial.

[0028] The above scheme enables the device to fix the dielectric radiation tube after the dielectric radiation tube penetrates into the straight radiation tube through the cooperation between the elastic block, the lever, the U-shaped clamp block and the third convex column. When the other end of the dielectric radiation tube passes over the elastic block, the elastic block will be reset by its own elastic force, thereby driving the lever to rotate counterclockwise around the hinge point with the connecting frame as the axis. At the same time, the height of the third convex column will decrease with the rotation of the lever, thereby forcing the second straight groove to drive the U-shaped clamp block to squeeze the outer wall of the dielectric radiation tube, thereby achieving the fixation of the dielectric radiation tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a front view cross-sectional structural schematic diagram of the present invention;

[0031] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0032] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0033] Figure 5 It is a schematic diagram of a partial cross-sectional structure of a connection block;

[0034] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0035] Figure 7 for Figure 5 The enlarged view of point B in the middle;

[0036] Figure 8 It is a structural schematic diagram of the limiting channel of the present invention;

[0037] Fig. 9 An exploded view of the support assembly of the present invention;

[0038] Fig.10 It is a structural schematic diagram of the fixing assembly of the present invention;

[0039] Fig.11 for Fig.10 Enlarged view of point E in the middle.

[0040] In the figure: 1, connecting block; 11, first boss; 12, limiting channel; 13, pipeline; 2, straight radiation tube; 3, support assembly; 31, support block; 311, limiting cross bar; 312, ball; 32, threaded rod; 321, spiral groove; 33, first slider; 331, second boss; 34, second slider; 341, first straight groove; 35, hollow clamping block; 4, fixing assembly; 41, connecting frame; 42, bracket; 43, elastic block; 44, lever; 441, third boss; 45, U-shaped clamping block; 451, second straight groove; 452, third straight groove; 5, dielectric radiation tube; 6, collar; 7, magnet. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figure 1 to Figure 2 As shown, the present invention provides a furnace flame heat radiation tube based on medium combustion, comprising a straight radiation tube 2 and a dielectric radiation tube 5, wherein the straight radiation tube 2 is arranged on the inner wall of the furnace, and the dielectric radiation tube 5 is sleeved inside the straight radiation tube 2, and the dielectric radiation tube 5 is provided with through holes in an annular array and periodically; the interior of the dielectric radiation tube 5 is a hollow structure, and the through holes on the dielectric radiation tube 5 are square or circular, the total area of ​​the through holes on the dielectric radiation tube 5 occupies at least 50% of the surface area of ​​the dielectric radiation tube 5, and the sum of the internal surface area of ​​each through hole is at least greater than six times the area of ​​each through hole;

[0043] By adopting the above scheme, by periodically distributing a plurality of through holes on the dielectric radiation tube 5, the combustion flame in the straight radiation tube 2 can be expanded, and the combustion flame is in a dielectric combustion state, so that more heat rays can be transmitted to the outside through the through holes on the dielectric radiation tube 5 for directional heat radiation, and can be continuously and stably directional irradiated to the heated pipe on the inner wall of the boiler, which can improve the thermal radiation stability and heat transfer efficiency of the tail end of the flame in the straight radiation tube 2, thereby improving the overall effective radiation efficiency of the flame in the boiler furnace, and having a higher radiation heat transfer effect. At the same time, the larger the actual radiation total surface area formed by the dielectric radiation tube 5 and the periodically distributed multiple through holes on the outer surface, the higher the thermal radiation stability and heat transfer efficiency of the flame in the straight radiation tube 2 to form a dielectric combustion state, thereby improving the effective radiation efficiency of the overall radiation heat transfer of the flame, and having a higher heat transfer energy-saving effect;

[0044] It should be noted that the tubular nozzle on the burner will penetrate into the medium radiation tube 5 to one third of the way and then spray out flames and burn, thereby avoiding the occurrence of excessive temperature at the fixed component 4.

[0045] like Figures 1 to 11 As shown, a connection structure suitable for furnace flame heat radiation tubes based on medium combustion is also provided, including a connection block 1, the connection block 1 is fixed to one end of a straight radiation tube 2 by bolts, and the connection block 1 is used to connect the straight radiation tube 2 and the medium radiation tube 5, and further includes: a support component 3, which is movably connected to one end of the connection block 1 located inside the straight radiation tube 2; a fixing component 4, which is arranged in a circumferential array inside the connection block 1 and is used to clamp one end of the medium radiation tube 5;

[0046] The connection block 1 comprises a circumferential array of limiting channels 12 and a pipe 13 which are arranged on the connection block 1, and a first protruding column 11 is fixedly connected to one end of the inner wall of the pipe 13;

[0047] The support assembly 3 includes a support block 31 arranged at one side of the connection block 1, a limiting cross bar 311 which can be inserted into the connection block 1 is fixedly connected to the support block 31, a threaded rod 32 is movably connected inside the support block 31, one end of the threaded rod 32 extends out of the pipe 13 and is movably connected to the support block 31, and a spiral groove 321 is provided on the threaded rod 32, a first slider 33 located inside the support block 31 is threadedly connected to the threaded rod 32, a second slider 34 is movably connected outside the first slider 33, a first straight groove 341 is provided on the second slider 34, a second convex column 331 which can slide inside the first straight groove 341 is fixedly connected to the first slider 33, and a hollow clamping block 35 is also fixedly connected to the second slider 34;

[0048] The first protruding column 11 is movably connected to the inside of the spiral groove 321;

[0049] A magnet 7 for attracting the threaded rod 32 is also fixed inside the connecting block 1;

[0050] By adopting the above solution, the dielectric radiation tube 5 pushes the support block 31 to move axially. At this time, due to the limitation of the spiral groove 321 by the first protrusion 11, the threaded rod 32 is forced to rotate and push the first slider 33 to move in the support block 31. At this time, the second protrusion 331 will slide in the first straight groove 341 and force the second slider 34 to drive the hollow clamping block 35 to move toward the dielectric radiation tube 5 and clamp the dielectric radiation tube 5. When the threaded rod 32 is separated from the connecting block 1, the support assembly 3 as a whole can move synchronously with the dielectric radiation tube 5, thereby ensuring that the straight radiation tube 2 and the inner wall of the dielectric radiation tube 5 are always coaxial.

[0051] It is worth noting that when the dielectric radiation tube 5 is taken out from the straight radiation tube 2, since the support assembly 3 is clamped on the dielectric radiation tube 5, the end of the dielectric radiation tube 5 that penetrates into the straight radiation tube 2 will drive the support assembly 3 to reset synchronously. When the threaded rod 32 re-enters the interior of the connecting block 1 and is limited by the first protrusion 11 on the spiral groove 321 and rotates, the hollow clamping block 35 will release the clamping of the dielectric radiation tube 5, and the dielectric radiation tube 5 can be taken out normally, and the threaded rod 32 will be attracted and reset by the magnetic force of the magnet 7.

[0052] like Figure 2-6 As shown, the diameter of the inner wall of the end of the support block 31 away from the fixing assembly 4 is smaller than the diameter of the outer wall of the dielectric radiation tube 5, the diameter of the support block 31 is smaller than the inner wall diameter of the threaded rod 32, the portion of the connecting block 1 located inside the straight radiation tube 2 is interference fit with the inner wall of the straight radiation tube 2, the diameter of the support block 31 is smaller than the inner wall diameter of the straight radiation tube 2, and the outer circumferential array of the support block 31 has balls 312 in contact with the inner wall of the straight radiation tube 2 and used to keep the straight radiation tube 2 coaxial with the support assembly 3;

[0053] By adopting the above solution, the design of the ball 312 ensures that the dielectric radiation tube 5 and the straight radiation tube 2 are always coaxial when the dielectric radiation tube 5 drives the support assembly 3 to move synchronously, and also reduces the friction force of the support assembly 3 when moving in the straight radiation tube 2.

[0054] like Figure 4-6 and Figure 8-9 As shown, the spiral groove 321 is divided into a spiral segment and an adjacent and connected straight segment. The first protrusion 11 moves in the spiral segment to force the threaded rod 32 to rotate one circle and then leave the spiral groove 321 from the straight segment. The end of the straight segment of the spiral groove 321 is trumpet-shaped, the end of the limiting channel 12 close to the support block 31 is trumpet-shaped, and the end of the limiting cross bar 311 away from the support block 31 is conical.

[0055] By adopting the above solution, the trumpet-shaped and conical designs of the limiting channel 12 and the end of the limiting cross bar 311 help the threaded rod 32 to accurately enter the connecting block 1 during the resetting process.

[0056] like Figure 1-3 , Figure 5 , Figure 7-8 and Figure 10-11 As shown, the fixing assembly 4 includes a connecting frame 41 fixedly connected to the inside of the connecting block 1 and located outside the straight radiation tube 2; a bracket 42 fixedly connected to the middle of the connecting frame 41; an elastic block 43 elastically connected to one end of the bracket 42; a U-shaped clamping block 45 movably connected to the bottom of the connecting frame 41; a lever 44 movably connected to the inside of the U-shaped clamping block 45 and having pins at both ends passing through the U-shaped clamping block 45 and hinged to the connecting frame 41;

[0057] The middle part of the elastic block 43 is movably connected to the top of the lever 44. After one end of the dielectric radiation tube 5 penetrates into the connecting block 1, the outer wall of the dielectric radiation tube 5 presses the elastic block 43 upward and causes the lever 44 to rotate clockwise, thereby causing the U-shaped clamp block 45 to move upward.

[0058] When the other end of the dielectric radiation tube 5 enters the straight radiation tube 2 and passes over the elastic block 43, the bottom end of the elastic block 43 loses support and moves due to its own elastic force, so that the elastic block 43 drives the U-shaped clamping block 45 downward through the lever 44 to clamp and fix the dielectric radiation tube 5;

[0059] The U-shaped clamp block 45 includes a second straight groove 451 and a third straight groove 452 formed thereon;

[0060] The bottom end of the lever 44 is also fixedly connected with a third convex column 441 that can slide inside the second straight groove 451. The pin at the bottom end of the lever 44 is movably connected to the top of the third straight groove 452, and the line connecting the pin at the bottom end of the lever 44 and the third convex column 441 is perpendicular to the horizontal direction.

[0061] With the above solution, one end of the dielectric radiation tube 5 first enters the connection block 1 to squeeze the elastic block 43 to make it move toward the bracket 42, and the elastic block 43 drives the lever 44 to rotate clockwise with the bottom pin as the axis, thereby driving the third protrusion 441 to move in the second straight groove 451 to force the U-shaped clamping block 45 to move upward, and the bottom end of the lever 44 is separated from the channel of the connection block 1 for the dielectric radiation tube 5 to move, and the dielectric radiation tube 5 continues to move and its outer wall continues to contact the bottom end of the elastic block 43;

[0062] When the other end of the dielectric radiation tube 5 passes over the elastic block 43, the elastic block 43 will be reset by its own elastic force, thereby driving the lever 44 to rotate counterclockwise around the hinge with the connecting frame 41. At the same time, the height of the third protrusion 441 will decrease with the rotation of the lever 44, thereby forcing the second straight groove 451 to drive the U-shaped clamping block 45 to squeeze the outer wall of the dielectric radiation tube 5, thereby achieving the fixation of the dielectric radiation tube 5.

[0063] It is worth noting that the lever 44 is actually a labor-saving lever. The elastic force of the elastic block 43 can drive the lever 44 to rotate about the axis and force the U-shaped clamp 45 to move, thereby ensuring the stability of the U-shaped clamp 45 when clamping the dielectric radiation tube 5.

[0064] like Figure 1-3 Figure 5 and Figure 7 As shown, one end of the connection block 1 is movably connected with a collar 6, and the inner wall diameter of the collar 6 is equal to the inner wall diameter of the connection block 1 and the outer wall diameter of the dielectric radiation tube 5;

[0065] The ends of the elastic block 43 and the U-shaped clamp block 45 away from the bracket 42 respectively penetrate the collar 6 and the connecting block 1, and extend to the inside of the collar 6 and the channel at the axis of the connecting block 1 respectively;

[0066] By adopting the above solution and designing the sleeve ring 6 , when people need to separate and remove the dielectric radiation tube 5 from the straight radiation tube 2 , people can press the sleeve ring 6 to squeeze the elastic block 43 upward to release the U-shaped clamp block 45 from fixing the dielectric radiation tube 5 .

[0067] The working principle and use process of the present invention:

[0068] First, the operator fixes the connection block 1 on the straight radiant tube 2 by means of bolts, and then pushes the dielectric radiant tube 5 into the straight radiant tube 2 through the connection block 1;

[0069] One end of the dielectric radiation tube 5 first enters the connection block 1 to squeeze the elastic block 43 to make it move toward the bracket 42, and the elastic block 43 drives the lever 44 to rotate clockwise with the bottom pin as the axis, thereby driving the third protrusion 441 to move in the second straight groove 451 to force the U-shaped clamping block 45 to move upward, and the bottom end of the lever 44 is separated from the channel of the connection block 1 for the dielectric radiation tube 5 to move, and the dielectric radiation tube 5 continues to move and its outer wall continues to contact the bottom end of the elastic block 43;

[0070] When the dielectric radiation tube 5 enters the support block 31, the dielectric radiation tube 5 will push the support block 31 to move axially under the limit of the limit cross bar 311, and the support block 31 will also drive the threaded rod 32 to move. At this time, due to the limit of the spiral groove 321 by the first protrusion 11, the threaded rod 32 is forced to rotate and push the first slider 33 to move in the support block 31. At this time, the second protrusion 331 will slide in the first straight groove 341 and force the second slider 34 to drive the hollow clamping block 35 to move toward the dielectric radiation tube 5 and clamp the dielectric radiation tube 5, thereby ensuring that the inner wall of the straight radiation tube 2 and the dielectric radiation tube 5 are coaxial. When the threaded rod 32 is separated from the connecting block 1, the support assembly 3 as a whole can move synchronously with the dielectric radiation tube 5.

[0071] When the other end of the dielectric radiation tube 5 passes over the elastic block 43, the elastic block 43 will be reset by its own elastic force, thereby driving the lever 44 to rotate counterclockwise around the hinge with the connecting frame 41. At the same time, the height of the third protrusion 441 will decrease with the rotation of the lever 44, thereby forcing the second straight groove 451 to drive the U-shaped clamping block 45 to squeeze the outer wall of the dielectric radiation tube 5, thereby fixing the dielectric radiation tube 5.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A furnace flame heat radiation tube based on medium combustion, comprising a straight radiation tube (2) and a medium radiation tube (5), characterized in that: The straight radiation tube (2) is arranged on the inner wall of the furnace, the dielectric radiation tube (5) is sleeved inside the straight radiation tube (2), and the two are placed along the same central axis, and the dielectric radiation tube (5) is provided with through holes in an annular array and periodically; The dielectric radiation tube (5) has a hollow structure inside, and the through holes on the dielectric radiation tube (5) are square or circular, the total area of ​​the through holes on the dielectric radiation tube (5) accounts for at least fifty percent of the surface area of ​​the dielectric radiation tube (5), and the sum of the internal surface areas of each through hole is at least greater than six times the area of ​​each through hole; A connection structure, the connection structure comprising a connection block (1), the connection block (1) being fixedly connected to one end of a straight radiant tube (2) by means of bolts, the connection block (1) being used to connect the straight radiant tube (2) and the dielectric radiant tube (5), and further comprising: A support assembly (3) movably connected to one end of the connection block (1) located inside the straight radiant tube (2); A fixing assembly (4) arranged in a circumferential array inside the connection block (1) and used to clamp one end of the dielectric radiation tube (5); The connecting block (1) comprises a circumferential array of limiting channels (12) and a pipe (13) provided on the connecting block (1); a first protruding column (11) is fixedly connected to one end of the inner wall of the pipe (13); The support assembly (3) comprises a support block (31) arranged at one side of the connection block (1); a limiting cross bar (311) which can be inserted into the connection block (1) is fixedly connected to the support block (31); a threaded rod (32) is movably connected inside the pipe (13); one end of the threaded rod (32) extends out of the pipe (13) and is movably connected to the support block (31); a spiral groove (321) is provided on the threaded rod (32); a first slider (33) located inside the support block (31) is threadedly connected to the threaded rod (32); a second slider (34) is movably connected outside the first slider (33); a first straight groove (341) is provided on the second slider (34); a second convex column (331) which can slide inside the first straight groove (341) is fixedly connected to the first slider (33); and a hollow clamp (35) is also fixedly connected to the second slider (34); After the dielectric radiation tube (5) passes through the connection block (1), it contacts one end of the support block (31) and pushes it to move axially, so that the first protruding column (11) slides along the inside of the spiral groove (321) and forces the threaded rod (32) to rotate. The rotation of the threaded rod (32) can drive the first slider (33) to drive the second protruding column (331) to slide along the first straight groove (341), and force the second slider (34) to drive the hollow clamping block (35) to move toward the dielectric radiation tube (5), thereby clamping one end of the dielectric radiation tube (5) and placing the dielectric radiation tube (5) and the straight radiation tube (2) on the same axis; A magnet (7) for attracting the threaded rod (32) is also fixedly connected inside the connecting block (1); The fixing assembly (4) comprises a connecting frame (41) fixedly connected to the inside of the connecting block (1) and located outside the straight radiant tube (2); A bracket (42) fixedly connected to the middle portion of the connecting frame (41); An elastic block (43) elastically connected to one end of the bracket (42); A U-shaped clamping block (45) movably connected to the bottom of the connecting frame (41); A lever (44) movably connected to the inside of the U-shaped clamp (45) and having pins at both ends passing through the U-shaped clamp (45) and hingedly connected to the connecting frame (41); The middle part of the elastic block (43) is movably connected to the top end of the lever (44), and after one end of the dielectric radiation tube (5) penetrates into the connecting block (1), the outer wall of the dielectric radiation tube (5) presses the elastic block (43) upward and causes the lever (44) to rotate clockwise, thereby causing the U-shaped clamp block (45) to move upward; When the other end of the dielectric radiation tube (5) enters the straight radiation tube (2) and passes over the elastic block (43), the bottom end of the elastic block (43) loses support and moves due to its own elastic force, so that the elastic block (43) drives the U-shaped clamping block (45) downward through the lever (44) to clamp and fix the dielectric radiation tube (5).

2. The connection structure according to claim 1, characterized in that: The U-shaped clamp block (45) comprises a second straight groove (451) and a third straight groove (452) formed thereon; The bottom end of the lever (44) is also fixedly connected to a third convex column (441) that can slide inside the second straight groove (451); a pin at the bottom end of the lever (44) is movably connected to the top of the third straight groove (452); and a line connecting the pin at the bottom end of the lever (44) and the third convex column (441) is perpendicular to the horizontal direction.

3. The connection structure according to claim 1, characterized in that: The diameter of the inner wall of the end of the support block (31) away from the fixing assembly (4) is smaller than the diameter of the outer wall of the dielectric radiation tube (5), the diameter of the support block (31) is smaller than the inner wall diameter of the threaded rod (32), the portion of the connecting block (1) located inside the straight radiation tube (2) is interference fit with the inner wall of the straight radiation tube (2), the diameter of the support block (31) is smaller than the inner wall diameter of the straight radiation tube (2), and the outer circumferential array of the support block (31) has balls (312) in contact with the inner wall of the straight radiation tube (2) and used to keep the straight radiation tube (2) coaxial with the support assembly (3).

4. The connection structure according to claim 1, characterized in that: The spiral groove (321) is divided into a spiral segment and an adjacent and connected straight segment. The first protrusion (11) moves in the spiral segment and forces the threaded rod (32) to rotate one circle and then detach from the spiral groove (321) from the straight segment. The end of the straight segment of the spiral groove (321) is trumpet-shaped. The end of the limiting channel (12) close to the support block (31) is trumpet-shaped. The end of the limiting cross bar (311) away from the support block (31) is conical.

5. The connection structure according to claim 1, characterized in that: One end of the connection block (1) is movably connected to a collar (6), and the inner wall diameter of the collar (6) is equal to the inner wall diameter of the connection block (1) and the outer wall diameter of the dielectric radiation tube (5).

6. The connection structure according to claim 1, characterized in that: The ends of the elastic block (43) and the U-shaped clamp block (45) away from the bracket (42) respectively penetrate the collar (6) and the connecting block (1), and extend into the channels inside the collar (6) and at the axis of the connecting block (1).

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