A downstream tunnel kiln fast firing device

Abstract

The invention relates to the technical field of tunnel kilns, and proposes a downstream tunnel kiln fast-firing device, comprising a car entry chamber, a preheating zone, a firing zone and a cooling zone which are sequentially distributed along the forward direction of a kiln car, wherein the bottom inner sides of the car entry chamber, the preheating zone, the firing zone and the cooling zone are provided with a driving track for the kiln car to move forward, and in the process of the kiln car moving in the firing zone, the kiln car can press down a table plate, so that the table plate presses down a support through a roller, thereby reducing the height of a limiting shaft, and the limiting shaft squeezes the arc-shaped track grooves on the turntables on both sides, so that the turntables on both sides rotate synchronously, and the rotation directions are opposite, and then the first tooth segment at the bottom of the turntable and the first pipe rack are meshed with the second tooth segment at the bottom of the second pipe rack to drive the first pipe rack to rotate clockwise, while the second pipe rack rotates counterclockwise, so that the fast-firing components on the first pipe rack and the second pipe rack can rotate and continuously adjust the injection position as the kiln car moves forward, thereby solving the problem of uneven heating of products in the firing zone in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel kilns, and in particular to a downstream tunnel kiln fast-firing device. Background Art

[0002] At present, the downstream tunnel kiln has a long tunnel-shaped kiln body. The tunnel kiln has a preheating zone, a firing zone and a cooling zone. In order to adapt to the production process of different products, some tunnel kilns also have a rapid cooling zone between the high-temperature zone and the cooling zone.

[0003] After searching, the announcement number CN212585454U discloses a downstream activated carbon regeneration roasting tunnel kiln, which is composed of a preheating zone, a firing zone, a cooling zone, a burner, a kiln head sealing door and a kiln tail sealing door. The tunnel kiln is provided with a vehicle entry chamber before the kiln head sealing door, and a vehicle chamber sealing door is provided at the vehicle entry end of the vehicle entry chamber. A pair of centralized smoke exhaust ports are provided on the walls on both sides of the middle and rear part of the firing zone, and the smoke exhaust ports are connected to the draft device through the smoke exhaust channel, and burners are arranged on both sides of the firing zone at the smoke exhaust ports. A high-temperature partition door is provided between the firing zone and the cooling zone, and a kiln tail sealing door is provided at the tail of the cooling zone. It has the advantages of good sealing performance, easy control of kiln pressure, high-temperature smoke exhaust, and easy treatment of smoke.

[0004] However, the above-mentioned tunnel kiln still has the following problems: the above-mentioned tunnel kiln is constructed by arranging burners on both sides of the firing zone at the smoke exhaust port. Since the positions of the burners are relatively fixed and the heights are flush along the forward direction of the kiln car, that is, when the kiln car moves in the firing zone, the positions of the burners on both sides for burning the products are at the same height, which makes it easy for other positions of the product to be heated unevenly. Summary of the invention

[0005] The invention provides a downstream tunnel kiln fast firing device, which solves the problem of uneven heating of products in a firing zone in the prior art.

[0006] The technical solution of the present invention is as follows: a downstream tunnel kiln fast burning device, comprising a car entry chamber, a preheating zone, a firing zone and a cooling zone which are sequentially distributed along the forward direction of the kiln car, the bottom inner sides of the car entry chamber, the preheating zone, the firing zone and the cooling zone are provided with a driving track for the kiln car to move, the firing zone is in the shape of a tubular column, and a pair of first pipe racks and second pipe racks are rotatably arranged on the inner wall, a plurality of fast burning components alternately distributed on both sides of the forward direction of the kiln car are arranged on the first pipe rack and the second pipe rack, the driving track is located in the firing zone and is hinged with a tilted table plate, a U-shaped bracket fixed in the firing zone is arranged below the table plate, a firing aid component abutting against the bottom surface of the table plate is arranged in the U-shaped bracket, two rotating components which can drive the first pipe rack and the second pipe rack to rotate in the opposite direction when the table plate presses down the firing aid component are arranged on the top of the U-shaped bracket, and a gas distribution pipe fitting which sequentially enhances the combustion of the fast burning components on the first pipe rack and the second pipe rack as the kiln car moves forward is arranged outside the firing aid component.

[0007] Preferably, the burning aid assembly includes a cylinder, which is vertically fixed in a U-shaped bracket, a guide tube is slidably connected to the inner side of the top of the cylinder, a support is fixed to the top of the guide tube, a roller is rotatably connected to the top of the support, a limiting axis is fixed through the bottom of the support, a convex ring is fixed to the outer side of the top of the guide tube, a spring is sleeved on the outer side of the guide tube, one end of the spring abuts against the convex ring, and the other end of the spring abuts against the cylinder, and a plunger slidably arranged in the cylinder is fixed to the bottom of the guide tube.

[0008] Preferably, an inwardly recessed annular groove is provided on the periphery of the middle portion of the plunger, and an air hole communicating with the inner cavity of the guide tube is provided in the annular groove.

[0009] Preferably, the rotating assembly includes a rotating shaft, which is rotatably connected to the U-shaped bracket, a turntable is fixed to one end of the rotating shaft, an arc-shaped rail groove is opened on the top of the turntable, the limiting shaft extends into the arc-shaped rail groove, and a first tooth segment is provided at the bottom of the turntable.

[0010] Preferably, the turntables of the two rotating assemblies are rotationally symmetrically distributed relative to the combustion-aiding assembly, and the bottoms of the first pipe rack and the second pipe rack are each provided with a second tooth segment respectively meshing with the first tooth segments on the two rotating assemblies.

[0011] Preferably, the gas distribution pipe comprises an air inlet pipe, the air outlet end of the air inlet pipe is connected to an air distribution valve, one air outlet end of the air distribution valve is connected to a hose, the air outlet end of the hose is connected to a guide pipe, the other air outlet end of the air distribution valve is connected to an air outlet pipe, the air outlet pipe is provided with a plurality of one-way air valves corresponding to each fast-burning component, and the cylinder body is provided with an air inlet branch pipe which connects the inner cavity of the cylinder body with each one-way air valve one by one.

[0012] Preferably, the fast-burning assembly includes a rack pipe, which is arc-shaped and fixed on the inner arc surfaces of the first pipe rack and the second pipe rack. The rack pipe is provided with a plurality of equidistantly distributed burners, and the injection directions of the burners converge to the axis of the rack pipe.

[0013] Preferably, the first tube rack and the second tube rack both include semi-ring bodies and semi-ring grooves, the semi-ring bodies on the first tube rack and the semi-ring grooves on the second tube rack are alternately arranged, and the semi-ring bodies on the second tube rack and the semi-ring grooves on the first tube rack are alternately arranged.

[0014] Preferably, upper rails are fixed on both sides of the top surface of the vehicle track and the platform, a lower rail is fixed in the middle of the bottom surface of the platform, and the rolling limit of the roller is outside the lower rail.

[0015] The beneficial effects of the present invention are:

[0016] In the present invention, the kiln car can press down the table plate during the process of traveling in the firing zone, so that the table plate presses down the support through the roller, thereby reducing the height of the limit shaft, and the limit shaft squeezes the arc-shaped rail grooves on the turntables on both sides, so that the turntables on both sides rotate synchronously and in opposite directions, and then the first tooth segment at the bottom of the turntable and the first pipe rack are engaged with the second tooth segment at the bottom of the second pipe rack to drive the first pipe rack to rotate clockwise, while the second pipe rack rotates counterclockwise, so that the fast-burning components on the first pipe rack and the second pipe rack can rotate and continuously adjust the injection position as the kiln car moves forward, thereby solving the problem of uneven heating of products in the firing zone in the prior art;

[0017] In the present invention, before the kiln car travels in the firing zone, the table plate is kept in an upturned state due to the elastic force of the spring. At this time, the plunger is at a high position of the cylinder, and the air hole in the annular groove of the plunger is not connected to any air inlet branch pipe. The main air inlet source of each fast-firing component comes from the air outlet pipe, so that the flame combustion intensity of the burner on each fast-firing component is consistent. Compared with the prior art, the present invention can realize preheating in the firing zone, and avoid the large temperature difference after the product enters the firing zone to affect the product quality;

[0018] In the present invention, when the pressure on the table plate gradually increases as the kiln car moves forward, the plunger gradually moves from high to low. When the air hole in the annular groove of the plunger is flush with the position height of the air inlet branch pipe, part of the gas introduced into the air inlet pipe is introduced into the guide pipe through the hose, and then enters the air inlet branch pipe through the air hole, and is led to the rack pipe by the gas branch pipe, thereby increasing the combustion intensity of each burner on the rack pipe. Since the one-way air valves on the air outlet pipe are connected with the rack pipes on the first pipe rack and the second pipe rack in sequence from top to bottom along the forward direction of the kiln car, the combustion intensity of the fast-burning components on the first pipe rack and the second pipe rack can increase with the forward movement of the trolley. Compared with the prior art, the present invention can improve the utilization rate of gas, achieve a fast-burning effect on the product, and save gas loss at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a top view schematic diagram of the present invention applied to a downstream tunnel kiln;

[0021] Figure 2 This is a schematic diagram of the structure of a downstream tunnel kiln fast firing device proposed by the present invention;

[0022] Figure 3 This is a schematic structural diagram of a downstream tunnel kiln fast firing device proposed by the present invention from another perspective;

[0023] Figure 4 This is a schematic diagram of the structure of the combustion-aiding assembly, the rotating assembly and the gas distribution pipe member proposed in the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the combustion-aiding assembly and the gas distribution pipe member proposed in the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the combustion-aiding assembly and the gas distribution pipe member proposed in the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the rotating assembly proposed by the present invention;

[0027] Figure 8 This is a schematic diagram of the disassembled structure of the first pipe rack and the second pipe rack proposed by the present invention;

[0028] Fig. 9 This is a schematic diagram of the structure of the fast-burning component proposed by the present invention;

[0029] Fig.10 This is a schematic diagram of the table structure proposed by the present invention;

[0030] In the figure: 1, car inlet chamber; 2, preheating zone; 3, burning zone; 4, cooling zone; 5, driving track; 6, first pipe rack; 61, semi-ring body; 62, semi-ring groove; 63, second tooth segment; 7, second pipe rack; 8, fast burning assembly; 81, rack pipe; 82, burner; 9, table; 91, upper rail; 92, lower rail; 10, U-shaped bracket; 11, burning auxiliary assembly; 111, cylinder; 112, guide pipe; 113, Support; 114, roller; 115, limit shaft; 116, convex ring; 117, spring; 118, plunger; 119, air hole; 12, rotating assembly; 121, rotating shaft; 122, turntable; 123, arc-shaped track groove; 124, first tooth segment; 13, air distribution pipe fitting; 131, air inlet pipe; 132, air outlet pipe; 133, air distribution valve; 134, hose; 135, one-way air valve; 136, air inlet branch pipe. DETAILED DESCRIPTION

[0031] The following will be combined with 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.

[0032] See also Figure 1 , Figure 2 and Figure 3 The present invention provides a technical solution: a downstream tunnel kiln fast-firing device, comprising a car entry chamber 1, a preheating zone 2, a firing zone 3 and a cooling zone 4 which are sequentially distributed along the forward direction of the kiln car, a driving track 5 for the kiln car to travel is arranged on the inner side of the bottom of the car entry chamber 1, the preheating zone 2, the firing zone 3 and the cooling zone 4, the firing zone 3 is in the shape of a pipe column, and a pair of first pipe racks 6 and second pipe racks 7 are rotatably arranged on the inner wall, and a plurality of fast-firing components 8 which are alternately distributed on both sides of the forward direction of the kiln car are arranged on the first pipe rack 6 and the second pipe rack 7, and the driving track A raised table plate 9 is hingedly connected to the firing zone 3, a U-shaped bracket 10 fixed to the firing zone 3 is arranged below the table plate 9, a burning aid component 11 abutting against the bottom surface of the table plate 9 is arranged inside the U-shaped bracket 10, two rotating components 12 are arranged on the top of the U-shaped bracket 10, which can drive the first pipe rack 6 and the second pipe rack 7 to rotate in the opposite direction when the table plate 9 presses down the burning aid component 11, and a gas distribution pipe 13 is arranged outside the burning aid component 11 to sequentially enhance the combustion of the fast burning components 8 on the first pipe rack 6 and the second pipe rack 7 as the kiln car moves forward.

[0033] See also Figure 4 , Figure 5 and Figure 6 The burning aid component 11 includes a cylinder 111, which is vertically fixed in the U-shaped bracket 10. A guide tube 112 is slidably connected to the inner side of the top of the cylinder 111. A support 113 is fixed to the top of the guide tube 112. A roller 114 is rotatably connected to the top of the support 113. A fixed limiting shaft 115 is passed through the bottom of the support 113. A convex ring 116 is fixed to the outer side of the top of the guide tube 112. A spring 117 is sleeved on the outer side of the guide tube 112. One end of the spring 117 abuts against the convex ring 116, and the other end of the spring 117 abuts against the cylinder 111. A plunger 118 slidably arranged in the cylinder 111 is fixed to the bottom of the guide tube 112. An inwardly recessed annular groove is provided on the outer periphery of the middle part of the plunger 118, and an air hole 119 communicating with the inner cavity of the guide tube 112 is opened in the annular groove.

[0034] See also Figure 4 and Figure 7The rotating assembly 12 includes a rotating shaft 121, which is rotatably connected to the U-shaped bracket 10. A rotating disc 122 is fixed to one end of the rotating shaft 121. An arc-shaped track groove 123 is provided on the top of the rotating disc 122. The limiting shaft 115 extends into the arc-shaped track groove 123. A first tooth segment 124 is provided at the bottom of the rotating disc 122. The rotating discs 122 of the two rotating assemblies 12 are rotationally symmetrically distributed relative to the firing aid assembly 11. The bottoms of the first pipe rack 6 and the second pipe rack 7 are respectively provided with second tooth segments 63 that mesh with the first tooth segments 124 on the two rotating assemblies 12. The kiln car can move down during the process of moving in the firing zone 3. The platen 9 is pressed so that the platen 9 presses down the support 113 through the roller 114, thereby reducing the height of the limit shaft 115, and the limit shaft 115 squeezes the arc-shaped track grooves 123 on the turntables 122 on both sides, so that the turntables 122 on both sides rotate synchronously and in opposite directions, and then the first tooth segment 124 at the bottom of the turntable 122 and the second tooth segment 63 at the bottom of the first pipe rack 6 and the second pipe rack 7 are engaged to drive the first pipe rack 6 to rotate clockwise, while the second pipe rack 7 rotates counterclockwise, so that the fast-burning components 8 on the first pipe rack 6 and the second pipe rack 7 can rotate and continuously adjust the injection position as the kiln car moves forward.

[0035] See also Figure 4 and Figure 5 The gas distribution pipe 13 includes an air inlet pipe 131, the outlet end of the air inlet pipe 131 is connected to a gas distribution valve 133, one outlet end of the gas distribution valve 133 is connected to a hose 134, the outlet end of the hose 134 is connected to the guide pipe 112, and the other outlet end of the gas distribution valve 133 is connected to the outlet pipe 132. The outlet pipe 132 is provided with a plurality of one-way gas valves 135 corresponding to each fast burning component 8, and the cylinder 111 is provided with a one-way gas valve 135 that connects the inner cavity of the cylinder 111 with each single gas valve 135. The air inlet branch pipes 136 connected to the air valves 135 one by one, in the initial state, are kept in an upturned state due to the elastic force of the spring 117 on the table 9. At this time, the plunger 118 is at a high position of the cylinder 111, and the air hole 119 in the annular groove of the plunger 118 is not connected to any air inlet branch pipe 136. The main air intake source of each fast-burning component 8 is from the air outlet pipe 132, so that the combustion intensity of the flame sprayed by the burner 82 on each fast-burning component 8 is consistent.

[0036] See also Figure 8 and Fig. 9The fast burning assembly 8 includes a rack pipe 81, which is arc-shaped and fixed on the inner arc surface of the first pipe rack 6 and the second pipe rack 7. A plurality of burners 82 are arranged on the rack pipe 81, and the spray direction of each burner 82 converges to the axis of the rack pipe 81. It should be noted that each one-way air valve 135 on the air outlet pipe 132 is connected with the rack pipe 81 on the first pipe rack 6 and the second pipe rack 7 in sequence from top to bottom along the forward direction of the kiln car. When the pressure of the table 9 is gradually increased by the forward movement of the kiln car, the plunger 118 gradually moves from high to low. When the air hole in the annular groove of the plunger 118 is opened, the air hole 135 on the air outlet pipe 132 is opened. When 119 is flush with the air inlet branch pipe 136, part of the gas introduced into the air inlet pipe 131 is introduced into the guide pipe 112 through the hose 134, and then enters the air inlet branch pipe 136 through the air hole 119, and is led to the rack pipe 81 by the gas branch pipe 135, thereby increasing the combustion intensity of each burner 82 on the rack pipe 81. Since the one-way gas valves 135 on the air outlet pipe 132 are connected with the rack pipes 81 on the first pipe rack 6 and the second pipe rack 7 in sequence from top to bottom along the forward direction of the kiln car, the combustion intensity of the fast-burning components 8 on the first pipe rack 6 and the second pipe rack 7 can be increased as the trolley moves forward.

[0037] The first pipe rack 6 and the second pipe rack 7 both include semi-ring bodies 61 and semi-ring grooves 62 . The semi-ring bodies 61 on the first pipe rack 6 and the semi-ring grooves 62 on the second pipe rack 7 are alternately arranged, and the semi-ring bodies 61 on the second pipe rack 7 and the semi-ring grooves 62 on the first pipe rack 6 are alternately arranged.

[0038] Upper rails 91 are fixed on both sides of the top surface of the traveling track 5 and the platform 9, and a lower rail 92 is fixed in the middle of the bottom surface of the platform 9 for guiding the kiln car. The rolling limit of the roller 114 is outside the lower rail 92 for limiting the moving direction of the roller 114.

[0039] The working principle and use process of the present invention are as follows: the kiln car can press down the platen 9 during the movement in the firing zone 3, so that the platen 9 presses down the support 113 through the roller 114, thereby reducing the height of the limit shaft 115, and the limit shaft 115 squeezes the arc-shaped track grooves 123 on the turntables 122 on both sides, so that the turntables 122 on both sides rotate synchronously and in opposite directions, and then the first tooth segment 124 at the bottom of the turntable 122 and the second tooth segment 63 at the bottom of the first pipe rack 6 and the second pipe rack 7 are engaged to drive the first pipe rack 6 to rotate clockwise, while the second pipe rack 7 rotates counterclockwise, so that the fast-burning components 8 on the first pipe rack 6 and the second pipe rack 7 can rotate and continuously adjust the injection position as the kiln car moves forward;

[0040] In the initial state, the table 9 is kept in an upturned state due to the elastic force of the spring 117. At this time, the plunger 118 is at a high position of the cylinder 111. The air hole 119 in the annular groove of the plunger 118 is not connected to any air inlet branch 136. The main air intake source of each fast-burning component 8 comes from the air outlet pipe 132, so that the flame combustion intensity of the burner 82 on each fast-burning component 8 is consistent. When the pressure of the table 9 is gradually increased by the kiln car moving forward, the plunger 118 gradually moves from high to low. When the air hole 119 in the annular groove of the plunger 118 is flush with the position of the air inlet branch 136, the air inlet Part of the gas introduced into the pipe 131 is introduced into the guide pipe 112 through the hose 134, and then enters the air inlet branch pipe 136 through the air hole 119, and is led to the rack pipe 81 by the gas branch pipe 135, thereby increasing the combustion intensity of each burner 82 on the rack pipe 81. Since the one-way gas valves 135 on the gas outlet pipe 132 are connected with the rack pipes 81 on the first pipe rack 6 and the second pipe rack 7 in sequence from top to bottom along the forward direction of the kiln car, the combustion intensity of the fast-burning components 8 on the first pipe rack 6 and the second pipe rack 7 can increase as the trolley moves forward, thereby improving the utilization rate of the gas, achieving a fast-burning effect on the product, and saving gas loss at the same time.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A downstream tunnel kiln fast firing device, comprising a car entry chamber (1), a preheating zone (2), a firing zone (3) and a cooling zone (4) which are sequentially distributed along the kiln car's forward direction, characterized in that: A travel track (5) for the kiln car to move is arranged on the inner side of the bottom of the vehicle entry chamber (1), the preheating zone (2), the firing zone (3) and the cooling zone (4); the firing zone (3) is in the shape of a tube column, and a pair of first tube racks (6) and second tube racks (7) are rotatably arranged on the inner wall; a plurality of fast-burning components (8) are arranged on the first tube rack (6) and the second tube rack (7) and are alternately distributed on both sides of the kiln car's forward direction; the travel track (5) is hingedly connected to a raised table plate (9) at a position inside the firing zone (3); a support plate (9) is arranged below the table plate (9); A U-shaped bracket (10) is arranged fixed in the firing zone (3), a firing aid component (11) is arranged in the U-shaped bracket (10) and contacts the bottom surface of the table (9), two rotating components (12) are arranged on the top of the U-shaped bracket (10) and can drive the first pipe rack (6) and the second pipe rack (7) to rotate in opposite directions when the table (9) presses down the firing aid component (11), and a gas distribution pipe (13) is arranged outside the firing aid component (11) and can sequentially enhance the combustion of the fast-burning components (8) on the first pipe rack (6) and the second pipe rack (7) as the kiln car moves forward; The combustion-aiding assembly (11) comprises a cylinder (111), the cylinder (111) being vertically fixed in a U-shaped bracket (10), a guide tube (112) being slidably connected to the inner side of the top of the cylinder (111), a support (113) being fixed to the top of the guide tube (112), a roller (114) being rotatably connected to the top of the support (113), a limiting axis (115) being fixedly passed through the bottom of the support (113), and a convex ring (114) being fixed to the outer side of the top of the guide tube (112). 16), a spring (117) is sleeved on the outer side of the guide tube (112), one end of the spring (117) abuts against the convex ring (116), and the other end of the spring (117) abuts against the cylinder (111), a plunger (118) slidably arranged in the cylinder (111) is fixed to the bottom of the guide tube (112), an annular groove recessed inwardly is provided on the periphery of the middle part of the plunger (118), and an air hole (119) communicating with the inner cavity of the guide tube (112) is opened in the annular groove; The rotating assembly (12) comprises a rotating shaft (121), the rotating shaft (121) being rotatably connected to the U-shaped bracket (10), a rotating disc (122) being fixed to one end of the rotating shaft (121), a top of the rotating disc (122) being provided with an arc-shaped track groove (123), the limiting shaft (115) extending into the arc-shaped track groove (123), a bottom of the rotating disc (122) being provided with a first tooth segment (124), the rotating discs (122) of the two rotating assemblies (12) being rotationally symmetrically distributed relative to the combustion-aiding assembly (11), and the bottoms of the first pipe rack (6) and the second pipe rack (7) being provided with second tooth segments (63) respectively meshing with the first tooth segments (124) on the two rotating assemblies (12); The gas distribution pipe member (13) comprises an air inlet pipe (131), the air outlet end of the air inlet pipe (131) is connected to an air distribution valve (133), one air outlet end of the air distribution valve (133) is connected to a hose (134), the air outlet end of the hose (134) is connected to a guide pipe (112), the other air outlet end of the air distribution valve (133) is connected to an air outlet pipe (132), a plurality of one-way air valves (135) corresponding to the fast-burning components (8) are provided on the air outlet pipe (132), and the cylinder (111) is provided with an air inlet branch pipe (136) that connects the inner cavity of the cylinder (111) with the one-way air valves (135) one by one. The fast burning assembly (8) comprises a rack pipe (81), the rack pipe (81) being arc-shaped and fixed to the inner arc surfaces of the first pipe rack (6) and the second pipe rack (7), the rack pipe (81) being provided with a plurality of burners (82) distributed at equal intervals, and the spraying directions of the burners (82) converge at the axis of the rack pipe (81).

2. A downstream tunnel kiln fast firing device according to claim 1, characterized in that: The first pipe rack (6) and the second pipe rack (7) both comprise semi-ring bodies (61) and semi-ring grooves (62); the semi-ring bodies (61) on the first pipe rack (6) and the semi-ring grooves (62) on the second pipe rack (7) are arranged alternately; and the semi-ring bodies (61) on the second pipe rack (7) and the semi-ring grooves (62) on the first pipe rack (6) are arranged alternately.

3. The downstream tunnel kiln fast firing device according to claim 1, characterized in that: Upper rails (91) are fixed to both sides of the top surface of the vehicle track (5) and the platform (9), a lower rail (92) is fixed to the middle of the bottom surface of the platform (9), and the rolling limit of the roller (114) is located outside the lower rail (92).

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