An atmosphere roller furnace with double-layer sealing structure

Abstract

The present invention relates to the field of roller furnaces, and specifically to an atmosphere type roller furnace with a double-layer sealing structure, comprising a roller furnace base, a roller furnace body being fixed on the top of the roller furnace base, two independent roller furnace heating chambers being superimposed and arranged inside the roller furnace body, a plurality of second rollers rotatable for conveying workpieces being arranged at equal intervals in the horizontal direction near the bottom of the inner side of the roller furnace heating chamber, two groups of annular limit blocks for preventing the workpieces from falling during conveying are symmetrically arranged on the outside of both ends of the second rollers, a first spline shaft is arranged at the center of both ends of the second rollers, and a plurality of rotatable mounting seats are installed at equal intervals in the horizontal direction on the left and right sides of the roller furnace body, a bearing sleeve is installed on the outside of the mounting seat, and a second spline shaft is arranged at one end of the mounting seat. The present application realizes that the second roller inside the roller furnace can be quickly disassembled and installed, and solves the problem of long replacement time and inconvenience of replacement of the second rollers.

Description

Technical Field

[0001] The invention relates to the field of roller hearth furnaces, and in particular to an atmosphere type roller hearth furnace with a double-layer sealing structure. Background Art

[0002] The atmosphere roller furnace is an advanced process testing and production equipment widely used in materials science and many other fields. It places the product directly or indirectly on the rollers and uses the continuous rotation of the rollers to achieve sequential advancement and efficient heat treatment of the product. This type of furnace can accurately adjust the atmosphere in the furnace and control the gas environment during sintering, quenching, annealing and other processes, thereby improving product quality and production efficiency. The atmosphere roller furnace has the advantages of fast heating speed, high temperature control accuracy and low energy consumption. It is especially suitable for the production of lithium battery positive electrode materials, ceramic products, fiberglass processing and semiconductor materials. Its efficient mechanization and automation operation not only reduces the labor intensity of workers, but also ensures the stability of product quality. It is an indispensable and important equipment in modern industrial production.

[0003] The patent document with announcement number CN116576685A discloses an exhaust device for the replacement chamber of an atmosphere roller furnace, including a conveying platform, a processing device and a replacement device; the processing device includes a base, a guide plate, a replacement chamber body, a calcining furnace and an exhaust pipe, the base is fixedly connected to the bottom of the conveying platform, the guide plate is fixedly connected to the inner wall of the base, the replacement chamber body is fixedly connected to the top of the conveying platform, the calcining furnace is fixedly connected to the top of the conveying platform, and the exhaust pipe is connected to the top of the calcining furnace; the replacement device includes an exhaust filter, an air inlet pipe, an air outlet pipe and a baffle, and the exhaust filter is fixedly connected to the top of the calcining furnace; the present application has the characteristics of strong practicality and preventing water vapor condensation from dripping on the material and improving the gas replacement efficiency in the replacement chamber, but there are still the following shortcomings.

[0004] Although the atmosphere roller furnace in the above patent document is highly practical and can prevent water vapor condensation from dripping onto the material and improve the gas replacement efficiency in the replacement chamber, the first roller of the existing atmosphere roller furnace is directly installed on the inner side of the workbench through a bearing, which makes the disassembly and replacement of the first roller time-consuming and labor-intensive, which is very inconvenient. Therefore, the inventor proposes an atmosphere roller furnace with a double-layer sealing structure to solve the above problem. Summary of the invention

[0005] In view of the above problems, an atmosphere type roller furnace with a double-layer sealing structure is provided, in which a bearing sleeve is arranged on the outside of a mounting seat so that the mounting seat is rotatably mounted on both sides of a roller furnace body through the bearing sleeve, and a second spline shaft is fixed at the center of one end of the mounting seat, and then a mounting sleeve is movably mounted on the outside of the second spline shaft through a first spline hole, and a return spring is arranged on the outside of the second spline shaft, and two ends of the return spring are respectively fixed to the mounting seat and the mounting sleeve, so that the return spring pushes the mounting sleeve to move horizontally along the second spline shaft, and a second spline hole is arranged at the center of the other end of the mounting sleeve, so that the second roller rod is movably mounted in the second spline hole through the first spline shafts arranged at the centers of both ends, so that the second roller rod inside the roller furnace can be quickly disassembled and installed, thereby solving the problem of long replacement cycle and inconvenient replacement of the second roller rod.

[0006] In order to solve the problems of the prior art, the present invention provides an atmosphere type roller furnace with a double-layer sealing structure, comprising a roller furnace base, a roller furnace body is fixed on the top of the roller furnace base, two independent roller furnace heating chambers are stacked inside the roller furnace body, a plurality of second rollers that can rotate and transport workpieces are equidistantly arranged in the horizontal direction on the inner side of the roller furnace heating chamber near the bottom, two groups of annular limit blocks for preventing the workpiece from falling during transportation are symmetrically arranged on the outside of both ends of the second roller, and a first spline shaft is arranged at the center of both ends of the second roller, and a plurality of rotatable mountings are equidistantly installed in the horizontal direction on both sides of the roller furnace body. The cam is an angular channel formed between a pair of camshafts and a pair of camshafts, and the camshafts are connected to a pair of camshafts which are connected to the rollers and the rollers are connected to the rollers' interior.

[0007] As a technical solution of the present invention, a first spline hole that can be adapted to the second spline shaft is arranged inside the other end of the mounting sleeve, so that the mounting sleeve can be movably installed on the outside of the second spline shaft through the first spline hole, so that the mounting sleeve can move horizontally along the outside of the second spline shaft through the first spline hole, thereby making the mounting sleeve suitable for the installation of second rollers of different sizes.

[0008] As a technical solution of the present invention, a protective shell is horizontally installed on the outside of one side of the roller furnace body, a rotatable rotating shaft is horizontally installed inside the protective shell, and a plurality of helical teeth that can engage with the worm gear are equidistantly arranged on the outside of the rotating shaft, and a rotating drive component is fixed on one end of the outside of one side of the roller furnace body close to the protective shell, and the output end of the rotating drive component is fixedly connected to the rotating shaft through a coupling, so that the rotating drive component drives the rotating shaft to rotate while driving the worm gear to rotate through the helical teeth.

[0009] As a technical solution of the present invention, a plurality of support frames are fixed at equal intervals in the horizontal direction near the bottom of the mounting seat on the inner side of the roller furnace body, and two groups of support plates for supporting the mounting sleeve are vertically arranged on the top of one end of the support frame, and a second mounting groove is arranged inside the top of the support plate, and a rolling ball is installed inside the second mounting groove, so that the support plate for supporting the mounting sleeve is vertically arranged on the upper end surface of one end of the support frame, so that the bearing capacity of the mounting sleeve is better, and a plurality of rolling balls are arranged inside the top of the support plate, and the top of the ball abuts against the lower end surface of the mounting sleeve to avoid blocking the rotation and horizontal movement of the mounting sleeve.

[0010] As a technical solution of the present invention, a refractory wall for heat preservation is arranged on the inner side of the roller furnace heating chamber, refractory bricks are installed at the centers of both sides of the refractory wall, a plurality of through holes for exhaust are arranged at the centers of the refractory bricks, and a plurality of electric heating shafts for heating are equidistantly arranged at the top and bottom of the inner side of the roller furnace heating chamber, so that the refractory bricks can be equidistantly installed at the centers of both sides of the refractory wall, and a plurality of through holes are arranged at the centers of the refractory bricks, so that when the temperature inside the roller furnace body is too high, the heat can be discharged through the through holes, thereby enabling the temperature inside the roller furnace to be adjusted.

[0011] As a technical solution of the present invention, two groups of sealing doors are symmetrically arranged at both ends of the roller furnace body, and first mounting grooves are symmetrically arranged at the top and bottom of the sealing doors, and telescopic components are installed inside the two ends of the first mounting groove, and a lifting sealing plate is movably arranged at the center of the first mounting groove, and the two sides of the lifting sealing plate can be fixed to the output end of the telescopic component, so that the telescopic component drives the lifting sealing plate to move longitudinally along the first mounting groove, so that the lifting sealing plate closes the workpiece conveying channel, thereby improving the airtightness of the roller furnace body and avoiding the rapid loss of heat inside the roller furnace body.

[0012] As a technical solution of the present invention, a group of workpiece conveying channels that can be connected to the roller furnace heating chamber are arranged through the interior of the sealed door, and a rotatable first roller bar is arranged at the bottom of the workpiece conveying channel, so that a rotatable first roller bar is arranged at the bottom of each workpiece conveying channel, so that the workpiece can be automatically conveyed to the interior of the roller furnace body.

[0013] As a technical solution of the present invention, a purification device is fixed at the center of the top of the roller furnace body, and air filters for filtering gas are arranged on both sides of the interior of the purification device, and an exhaust fairing is fixed at the center of the top of the purification device, so that multiple air filters are longitudinally installed on both sides of the interior of the purification device near the input end to filter the air, thereby avoiding the exhaust gas generated when the workpiece is heated from being directly discharged into the air to pollute the environment.

[0014] As a technical solution of the present invention, a chassis is fixed on both sides of the purification device, and a fan for driving air flow is fixed inside the chassis through a frame, and a guide pipe for guiding air flow is arranged at one end of the chassis, and two groups of guide covers that can be respectively connected to the interior of the roller furnace heating chamber are arranged at the input end of the guide pipe, and the number of the guide covers corresponds to the number of refractory bricks, so that the guide pipe can be fixed to the input end of the chassis, and two groups of guide covers that can be connected to the interior of the roller furnace body are arranged at the bottom end of the guide pipe, so that the input end of the guide cover is on one side of the refractory brick, so that the fan inside the chassis drives the airflow, so that the exhaust gas inside the roller furnace body enters the guide pipe through the through hole and the guide cover, and then the exhaust gas is filtered by the air filter element inside the purification device and discharged through the fairing.

[0015] As a technical solution of the present invention, an electromagnetic control valve for controlling the air flow is arranged outside the air guide pipe near the chassis, so that the electromagnetic control valve controls the air flow inside the air guide pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present application arranges a bearing sleeve on the outside of the mounting seat, so that the mounting seat is rotatably mounted on both sides of the roller furnace body through the bearing sleeve, and the second spline shaft is fixed at the center of one end of the mounting seat, and then the mounting sleeve is movably mounted on the outside of the second spline shaft through the first spline hole, and a return spring is arranged on the outside of the second spline shaft, and the two ends of the return spring are respectively fixed to the mounting seat and the mounting sleeve, so that the return spring pushes the mounting sleeve to move horizontally along the second spline shaft, and a second spline hole is arranged at the center of the other end of the mounting sleeve, so that the second roller rod is movably mounted in the second spline hole through the first spline shaft arranged at the centers of both ends, thereby realizing that the second roller rod inside the roller furnace can be quickly disassembled and installed, and solving the problem of long replacement cycle and inconvenient replacement of the second roller rod.

[0018] The present application arranges sealing doors at both ends of the roller furnace body, and arranges a plurality of first mounting grooves at the top and bottom of the sealing doors, then movably installs a lifting and blocking plate inside the first mounting groove, and fixes a telescopic component inside the two ends of the first mounting groove, and the output end of the telescopic component can be fixed to the two sides of the lifting and blocking plate, so that the telescopic component drives the lifting and blocking plate to move longitudinally along the first mounting groove, so that the lifting and blocking plate closes the workpiece conveying channel, thereby improving the airtightness of the roller furnace body, avoiding the rapid loss of heat inside the roller furnace body, achieving better airtightness of the roller furnace body, and solving the problem of excessive loss of heat energy inside the roller furnace body.

[0019] The present application fixes the support frame on the inner side of the roller furnace body near the bottom of the mounting seat, and vertically arranges a support plate for supporting the mounting sleeve on the upper end surface of one end of the support frame, so that the bearing capacity of the mounting sleeve is better, and movably installs a ball inside the second mounting groove at the top end of the support plate, and the ball can abut against the lower surface of the mounting sleeve, so that the ball supports the mounting sleeve while avoiding blocking the rotation and horizontal movement of the mounting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of an atmosphere roller furnace with a double-layer sealed structure.

[0021] Figure 2 It is a top view of an atmosphere roller furnace with a double-layer sealing structure.

[0022] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle.

[0023] Figure 4 yes Figure 2 Cross-sectional view at BB in the middle.

[0024] Figure 5 It is an exploded view of the sealing door in an atmosphere roller furnace with a double-layer sealing structure.

[0025] Figure 6 It is a three-dimensional diagram of the exhaust device in an atmosphere roller furnace with a double-layer sealing structure.

[0026] Figure 7 It is a three-dimensional diagram of the second roller in an atmosphere roller furnace with a double-layer sealing structure.

[0027] Figure 8 It is an exploded view of the second roller in an atmosphere roller furnace with a double-layer sealing structure.

[0028] Fig. 9 The present invention is a three-dimensional diagram of a mounting base in an atmosphere roller furnace with a double-layer sealing structure.

[0029] Fig.10 It is an exploded view of a mounting seat in an atmosphere roller furnace with a double-layer sealing structure.

[0030] Fig.11 It is a three-dimensional diagram of the installation of the casing in an atmosphere roller furnace with a double-layer sealing structure.

[0031] Fig.12 It is a three-dimensional diagram of a support frame in an atmosphere roller furnace with a double-layer sealed structure.

[0032] Fig.13 yes Figure 3 Enlarged view of point A in .

[0033] The numbers in the figure are: 1, roller furnace base; 2, roller furnace body; 21, roller furnace heating chamber; 22, electric heating shaft; 23, fireproof wall; 3, sealing door; 31, first mounting groove; 32, telescopic assembly; 33, workpiece conveying channel; 34, high temperature resistant lifting and blocking plate; 35, first roller rod; 4, second roller rod; 41, annular limit stopper; 42, first spline shaft; 5, mounting seat; 51, bearing sleeve; 52, second spline shaft; 53, reset spring; 5 4. Mounting sleeve; 55. First spline hole; 56. Second spline hole; 57. Worm gear; 6. Support frame; 61. Support plate; 62. Second mounting slot; 63. Ball bearing; 7. Purification device; 71. Air filter element; 72. Chassis; 73. Fairing; 74. Fan; 75. Guide pipe; 76. Guide cover; 77. Solenoid control valve; 8. Refractory brick; 81. Through hole; 9. Rotating drive member; 91. Rotating shaft; 92. Helical teeth; 93. Protective shell. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] See also Figure 1-Figure 13As shown, an atmosphere type roller furnace with a double-layer sealing structure includes a roller furnace base 1, a roller furnace body 2 is fixed on the top of the roller furnace base 1, two independent roller furnace heating chambers 21 are stacked inside the roller furnace body 2, a plurality of second rollers 4 that can rotate and transport workpieces are equidistantly arranged in the horizontal direction near the bottom of the inner side of the roller furnace heating chamber 21, two groups of annular limit blocks 41 for preventing the workpiece from falling during transportation are symmetrically arranged on the outside of both ends of the second roller 4, and first spline shafts 42 are arranged at the centers of both ends of the second roller 4, and both sides of the roller furnace body 2 are arranged horizontally. A plurality of rotatable mounting seats 5 are equidistantly installed in the direction, a bearing sleeve 51 is installed on the outside of the mounting seat 5, and a second spline shaft 52 is arranged at one end of the mounting seat 5, a mounting sleeve 54 is installed on the outside of one end of the second spline shaft 52, and a second spline hole 56 which can be adapted to the first spline shaft 42 is arranged inside one end of the mounting sleeve 54, and a return spring 53 for pushing the mounting sleeve 54 is arranged on the outside of the second spline shaft 52, and both ends of the return spring 53 are respectively fixed on the mounting seat 5 and the mounting sleeve 54, and a worm gear 57 for transmission is installed on the outside of the other end of the mounting seat 5.

[0036] When in use, a bearing sleeve 51 is arranged on the outside of the mounting seat 5, so that the mounting seat 5 is rotatably mounted on both sides of the roller furnace body 2 through the bearing sleeve 51, and the second spline shaft 52 is fixed at the center of one end of the mounting seat 5, and then the mounting sleeve 54 is movably mounted on the outside of the second spline shaft 52 through the first spline hole 55, and a return spring 53 is arranged on the outside of the second spline shaft 52, and the two ends of the return spring 53 are respectively fixed to the mounting seat 5 and the mounting sleeve 54, so that the return spring 53 pushes the mounting sleeve 54 to move horizontally along the second spline shaft 52, and a second spline hole 56 is arranged at the center of the other end of the mounting sleeve 54, so that the second roller rod 4 is movably mounted in the second spline hole 56 through the first spline shaft 42 arranged at the centers of both ends, so that the second roller rod 4 inside the roller furnace can be quickly disassembled and installed.

[0037] See also Fig.11 As shown, a first spline hole 55 capable of matching with the second spline shaft 52 is provided inside the other end of the mounting sleeve 54 .

[0038] When in use, a first spline hole 55 is set at the center of the other end of the mounting sleeve 54, and the first spline hole 55 can be adapted to the mounting sleeve 54, so that the mounting sleeve 54 can be movably mounted on the outside of the second spline shaft 52 through the first spline hole 55, so that the mounting sleeve 54 can move horizontally along the outside of the second spline shaft 52 through the first spline hole 55, thereby making the mounting sleeve 54 suitable for the installation of second rollers 4 of different sizes.

[0039] See also Figure 1As shown, a protective shell 93 is horizontally installed on the outside of one side of the roller furnace body 2, a rotatable rotating shaft 91 is horizontally installed inside the protective shell 93, and a plurality of helical teeth 92 that can mesh with the worm gear 57 are equidistantly arranged on the outside of the rotating shaft 91, and a rotating drive member 9 is fixed to one end of the outside of one side of the roller furnace body 2 close to the protective shell 93, and the output end of the rotating drive member 9 is fixedly connected to the rotating shaft 91 through a coupling.

[0040] When in use, the rotating shaft 91 is rotatably installed inside the protective shell 93, and a plurality of helical teeth 92 are arranged on the outside of the rotating shaft 91, and the helical teeth 92 are respectively engaged with the worm gear 57, so that the rotating shaft 91 drives the worm gear 57 to rotate through the helical teeth 92, and then the rotating drive member 9 is fixed to the outside of the roller furnace body 2, and one end of the rotating shaft 91 is fixed to the output end of the rotating drive member 9, so that the rotating drive member 9 drives the rotating shaft 91 to rotate.

[0041] See also Fig.12 As shown, a number of support frames 6 are fixed equidistantly along the horizontal direction on the inner side of the roller furnace body 2 near the bottom of the mounting seat 5, and two groups of support plates 61 for supporting the mounting sleeve 54 are vertically arranged on the top of one end of the support frame 6, and a second mounting groove 62 is arranged inside the top of the support plate 61, and a rolling ball 63 is installed inside the second mounting groove 62.

[0042] When in use, by fixing the support frame 6 on the inner side of the roller furnace body 2 near the bottom of the mounting seat 5, and vertically setting a support plate 61 for supporting the mounting sleeve 54 on the upper end surface of one end of the support frame 6, the bearing capacity of the mounting sleeve 54 is improved, thereby avoiding increasing the service life of the mounting seat 5, and movably installing a ball 63 inside the second mounting groove 62 at the top of the support plate 61, and the ball 63 can abut against the lower surface of the mounting sleeve 54, so that the ball 63 supports the mounting sleeve 54 while avoiding blocking the rotation and horizontal movement of the mounting sleeve 54.

[0043] See also Fig.13 As shown, a refractory wall 23 for heat preservation is arranged on the inner side of the roller furnace heating chamber 21, refractory bricks 8 are installed at the centers of both sides of the refractory wall 23, a plurality of through holes 81 for exhaust are arranged at the centers of the refractory bricks 8, and a plurality of electric heating shafts 22 for heating are equidistantly arranged at the top and bottom of the inner side of the roller furnace heating chamber 21.

[0044] When in use, the refractory wall 23 is installed inside the roller furnace heating chamber 21, so that the refractory wall 23 blocks the heat loss inside the roller furnace body 2, thereby reducing the energy consumption of the roller furnace, and then a number of refractory bricks 8 are evenly arranged at the center of both sides of the refractory wall 23, and a plurality of through holes 81 are arranged at the center of the refractory bricks 8, so that when the temperature inside the roller furnace body 2 is too high, the heat is discharged through the through holes 81, so that the temperature inside the roller furnace can be adjusted.

[0045] See also Figure 5 As shown, two sets of sealing doors 3 are symmetrically arranged at both ends of the roller furnace body 2, and first mounting grooves 31 are symmetrically arranged at the top and bottom of the sealing doors 3, and telescopic components 32 are installed inside the two ends of the first mounting grooves 31, and a lifting sealing plate 34 is movably arranged at the center of the first mounting groove 31, and both sides of the lifting sealing plate 34 can be fixed to the output end of the telescopic component 32.

[0046] When in use, sealing doors 3 are respectively arranged at both ends of the roller furnace body 2, and a plurality of first mounting grooves 31 are respectively arranged at the top and bottom ends of the sealing doors 3, and then the lifting and closing plates 34 are movably installed inside the first mounting grooves 31, and the telescopic components 32 are fixed inside the two ends of the first mounting grooves 31, and the output ends of the telescopic components 32 can be fixed to the two sides of the lifting and closing plates 34, so that the telescopic components 32 drive the lifting and closing plates 34 to move longitudinally along the first mounting grooves 31, so that the lifting and closing plates 34 close the workpiece conveying channel 33, thereby improving the airtightness of the roller furnace body 2 and avoiding the rapid loss of heat inside the roller furnace body 2.

[0047] See also Figure 5 As shown, a workpiece conveying channel 33 capable of communicating with the roller furnace heating chamber 21 is provided through the interior of the sealed door 3 , and a rotatable first roller bar 35 is provided at the bottom of the workpiece conveying channel 33 .

[0048] When in use, a workpiece conveying channel 33 is set through the inside of the sealed door 3, and the workpiece conveying channel 33 can be connected with the roller furnace heating chamber 21 respectively, and a rotatable first roller rod 35 is set at the bottom of each workpiece conveying channel 33, so that the workpiece can be automatically conveyed to the inside of the roller furnace body 2.

[0049] See also Figure 6 As shown, a purification device 7 is fixed at the center of the top of the roller furnace body 2, air filter elements 71 for filtering gas are arranged on both sides of the inside of the purification device 7, and an exhaust fairing 73 is fixed at the center of the top of the purification device 7.

[0050] When in use, multiple air filters 71 are longitudinally installed on both sides of the purification device 7 near the input end, so that the air filters 71 filter the air to prevent the exhaust gas generated when the workpiece is heated from being directly discharged into the air and causing environmental pollution.

[0051] See also Figure 3 and Figure 6 As shown, a chassis 72 is fixed on both sides of the purification device 7, and a fan 74 for driving air flow is fixed inside the chassis 72 through a frame, and a guide pipe 75 for guiding air flow is provided at one end of the chassis 72, and two groups of guide covers 76 that can be respectively connected to the inside of the roller furnace heating chamber 21 are provided at the input end of the guide pipe 75, and the number of the guide covers 76 corresponds to the number of refractory bricks 8.

[0052] When in use, the guide tube 75 is fixed to the input end of the chassis 72, and two groups of guide covers 76 that can be connected to the inside of the roller furnace body 2 are arranged at the bottom of the guide tube 75, and the input end of the guide cover 76 is located on one side of the refractory brick 8, so that the fan 74 inside the chassis 72 drives the air flow, so that the exhaust gas inside the roller furnace body 2 enters the guide tube 75 through the through hole 81 and the guide cover 76, and the exhaust gas is filtered by the air filter element 71 inside the purification device 7 and then discharged through the fairing 73.

[0053] See also Figure 6 As shown, an electromagnetic control valve 77 for controlling the air flow is provided outside the guide tube 75 near the chassis 72 .

[0054] When in use, the electromagnetic control valve 77 is arranged outside the flow guide tube 75 so that the electromagnetic control valve 77 controls the air flow inside the flow guide tube 75 for control.

[0055] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An atmosphere roller hearth furnace with a double-layer sealing structure, comprising a roller hearth furnace base (1), characterized in that: A roller furnace body (2) is fixed to the top of the roller furnace base (1), two independent roller furnace heating chambers (21) are superimposed inside the roller furnace body (2), a plurality of second rollers (4) rotatable for conveying workpieces are equidistantly arranged in the horizontal direction on the inner side of the roller furnace heating chamber (21) near the bottom, two groups of annular limit blocks (41) for preventing the workpieces from falling during conveying are symmetrically arranged on the outside of both ends of the second roller (4), and a first spline shaft (42) is arranged at the center of both ends of the second roller (4), and a plurality of rotatable mounting seats (5) are equidistantly installed on both sides of the roller furnace body (2) in the horizontal direction. A bearing sleeve (51) is installed on the outside of the mounting seat (5), and a second spline shaft (52) is arranged at one end of the mounting seat (5), a mounting sleeve (54) is plugged and installed on the outside of one end of the second spline shaft (52), a second spline hole (56) capable of matching with the first spline shaft (42) is arranged inside one end of the mounting sleeve (54), and a return spring (53) for pushing the mounting sleeve (54) is arranged on the outside of the second spline shaft (52), and two ends of the return spring (53) are respectively fixed on the mounting seat (5) and the mounting sleeve (54), and a worm gear (57) for transmission is installed on the outside of the other end of the mounting seat (5); A first spline hole (55) capable of matching with the second spline shaft (52) is provided inside the other end of the mounting sleeve (54); A protective shell (93) is horizontally mounted on the outside of one side of the roller furnace body (2), a rotatable rotating shaft (91) is horizontally mounted inside the protective shell (93), and a plurality of helical teeth (92) capable of meshing with a worm gear (57) are equidistantly arranged on the outside of the rotating shaft (91), and a rotating drive member (9) is fixed to one end of the outside of one side of the roller furnace body (2) close to the protective shell (93), and an output end of the rotating drive member (9) is fixedly connected to the rotating shaft (91) via a coupling; A plurality of support frames (6) are fixed at equal intervals in the horizontal direction on the inner side of the roller furnace body (2) near the bottom of the mounting seat (5); two groups of support plates (61) for supporting the mounting sleeve (54) are vertically arranged on the top of one end of the support frame (6); a second mounting groove (62) is arranged inside the top of the support plate (61); and a rolling ball (63) is installed inside the second mounting groove (62); A refractory wall (23) for heat preservation is arranged inside the roller furnace heating chamber (21), refractory bricks (8) are installed at the center of both sides of the refractory wall (23), a plurality of through holes (81) for exhaust are arranged at the center of the refractory bricks (8), and a plurality of electric heating shafts (22) for heating are equidistantly arranged at the top and bottom of the inner side of the roller furnace heating chamber (21); A purification device (7) is fixed at the center of the top of the roller furnace body (2), air filter elements (71) for filtering gas are arranged on both sides of the interior of the purification device (7), and an exhaust fairing (73) is fixed at the center of the top of the purification device (7); A chassis (72) is fixed on both sides of the purification device (7), a fan (74) for driving air flow is fixed inside the chassis (72) through a frame, and a guide pipe (75) for guiding air flow is arranged at one end of the chassis (72), and two groups of guide covers (76) that can be respectively connected to the inside of the roller furnace heating chamber (21) are arranged at the input end of the guide pipe (75), and the number of the guide covers (76) corresponds to the number of refractory bricks (8); An electromagnetic control valve (77) for controlling the air flow rate is provided on the outside of the flow guide pipe (75) near the chassis (72).

2. The double-layer sealed atmosphere roller furnace according to claim 1, characterized in that: Two sets of sealing doors (3) are symmetrically arranged at both ends of the roller furnace body (2), and first mounting grooves (31) are symmetrically arranged at the top and bottom of the sealing doors (3), and telescopic components (32) are installed inside the two ends of the first mounting groove (31), and a lifting and blocking plate (34) is movably arranged at the center of the first mounting groove (31), and both sides of the lifting and blocking plate (34) can be fixed to the output end of the telescopic component (32).

3. The double-layer sealed atmosphere roller furnace according to claim 2, characterized in that: A set of workpiece conveying channels (33) capable of communicating with the roller furnace heating chamber (21) is provided through the interior of the sealing door (3), and a rotatable first roller bar (35) is provided at the bottom of the workpiece conveying channel (33).

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