Roller hearth type heating furnace

Abstract

The utility model provides a roller hearth type heating furnace, and belongs to the technical field of heating furnaces. The roller hearth type heating furnace comprises a transmission platform, a transmission roller, a heating box, a heating wire assembly, a feeding port, a supporting beam, a lifting frame, a rack assembly, a rotating shaft, a gear, a connecting rod and a furnace door assembly. One ends of the at least two connecting rods are connected with the bottom of the lifting frame, the other ends of the at least two connecting rods are connected with the furnace door assembly, and the furnace door assembly covers the outer side of the feeding port, so that the lifting frame can drive the furnace door assembly to move up and down through the multiple connecting rods; therefore, the feeding port can be opened or closed through the furnace door assembly, the inner wall of the heating box is closed, heat loss in the heating box is avoided, energy consumption of products is reduced, and the production cost of the products is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heating furnace, specifically relates to a roller bottom type heating furnace. BACKGROUND

[0002] In the related art, when the workpiece is heat treated, the workpiece is placed in the heating furnace, and the workpiece is heated to complete the heat treatment of the workpiece.

[0003] The prior art (authorized announcement number: CN201852437U) discloses a tunnel continuous type microwave high-temperature heating furnace, the tunnel continuous type microwave high-temperature heating furnace, including equipment support, microwave box and transmission device, the transmission device includes setting transmission track and two groups of chain wheel-chain structure, the transmission chain in the chain wheel-chain structure is made of high-temperature resistant metal, and a plurality of supporting rods are fixed between the two transmission chains along the transmission chain and are spaced apart. By adopting two groups of chain wheel-chain structure as the transmission main body, and positioning through the transmission track, the transmission process is stable, and further through the transmission control of the speed regulating motor, the material conveying speed can be freely and continuously adjusted, the chain is made of high-temperature resistant metal, so that the continuous and uninterrupted conveying of the material under high-temperature conditions can be smoothly completed.

[0004] In the prior art, the workpiece is conveyed into the microwave box, and the workpiece is heated in the microwave box to complete the heat treatment of the workpiece; when the workpiece is heated, the inlet of the microwave box is not closed, so that the heat in the microwave box is lost, thereby increasing the energy consumption of the product and the production cost of the product. UTILITY MODEL CONTENTS

[0005] In order to solve the problem that the inlet of the microwave box is not closed in the prior art, the heat in the microwave box is lost, the energy consumption of the product is increased, and the production cost of the product is increased, the utility model provides a roller bottom type heating furnace, at least two connecting rods are connected with the bottom of the lifting frame at one end, the other end of the at least two connecting rods is connected with the furnace door assembly, and the furnace door assembly is arranged outside the inlet, so that the lifting frame can drive the furnace door assembly to move up and down through the multiple connecting rods, so that the furnace door assembly can open or close the inlet, and the inner wall of the heating box is closed to avoid the heat loss in the heating box, thereby reducing the energy consumption of the product and the production cost of the product. Its specific technical scheme is:

[0006] The utility model provides a roller hearth heating furnace, which comprises a transmission platform, a transmission roller, a heating box, a heating wire assembly, a feeding port, a support beam, a lifting frame, a rack assembly, a rotating shaft, a gear, a connecting rod and a furnace door assembly, the transmission roller is rotatably connected to the top of the transmission platform, the heating box is a hollow cavity, and the heating box is connected to the top of one side of the transmission platform, the heating wire assembly is installed in the heating box and located above the transmission roller, the feeding port is arranged at the bottom of the heating box and located above the transmission roller, the support beam is connected to the top of the other side of the transmission platform and located at one side of the heating box, the lifting frame is located above the support beam, the rack assembly is installed at the two ends of the lifting frame, the rotating shaft is rotatably connected to the end of the heating box, the gear is sleeved on the outer side of the rotating shaft, and the gear is engaged with the rack assembly, one end of the connecting rod is connected to the bottom of the lifting frame, the other end of the connecting rod passes through the support beam, and the furnace door assembly is connected to the other end of the connecting rod.

[0007] In addition, the roller hearth heating furnace in the above technical solution can have the following additional technical features.

[0008] In the above technical solution, the roller hearth heating furnace further comprises a connecting frame, a sliding block and a sliding rail, the connecting frame is connected to the lifting frame, the sliding block is provided with a sliding groove, and the sliding block is connected to the connecting frame, the sliding rail is installed at the end of the heating box, and the sliding rail passes through the sliding groove of the sliding block.

[0009] In the above technical solution, the roller hearth heating furnace further comprises a driving device and a lifting cylinder, the driving device is installed at the end of the heating box and connected to the rotating shaft, and the lifting cylinder is installed at the end of the heating box and connected to the connecting frame.

[0010] In the above technical solution, the rack assembly comprises a fixed seat, an adjusting seat, a connecting hole, a connecting bolt, a rack body, an adjusting nut and an adjusting jack, the fixed seat is installed on the lifting frame, the adjusting seat is located on the side of the fixed seat close to the heating box, the connecting hole is in a strip shape, a plurality of connecting holes are arranged in the adjusting seat, the connecting bolt is inserted into the heating box, the rack body is connected to the adjusting seat and engaged with the gear, the adjusting nut is provided with an internal thread, the adjusting nut is fixed on the fixed seat, the adjusting jack is provided with an external thread on the outer wall, the adjusting jack passes through the fixed seat and the adjusting nut in sequence and is attached to the adjusting seat, and the internal thread is matched with the external thread.

[0011] In the technical scheme, the furnace door assembly comprises a furnace door body and heat insulation cotton; the furnace door body is a hollow cavity, and the furnace door body is connected with the other ends of the at least two connecting rods; and the heat insulation cotton is embedded in the furnace door body.

[0012] In the technical scheme, the roller-hearth heating furnace further comprises a gas collecting cover, an exhaust pipe and a dust cover; the gas collecting cover is a hollow cavity with an opening at the bottom, the gas collecting cover is connected with the top of the transmission platform, the gas collecting cover is located above the transmission roller, and the gas collecting cover is located on the side of the furnace door assembly away from the heating box; the exhaust pipe is a hollow cavity with openings at both ends, the bottom opening of the exhaust pipe is in communication with the top of the gas collecting cover; and the dust cover is connected with the top of the exhaust pipe, and there is a space between the dust cover and the exhaust pipe.

[0013] In the technical scheme, the roller-hearth heating furnace further comprises hoisting screws, connecting beams and support plates; the two hoisting screws are installed on the top of the gas collecting cover; the two connecting beams are connected with the heating box, and the two connecting beams are located above the gas collecting cover; the support plates are provided with support grooves, the two support plates are connected with the two connecting beams respectively, and the exhaust pipe is embedded in the support grooves of the two support plates.

[0014] Compared with the prior art, the roller-hearth heating furnace has the beneficial effects that:

[0015] 1. By installing two rack assemblies at both ends of the lifting frame, rotatingly connecting two rotating shafts with the end portions of the heating box, respectively sleeving two gears outside the rotating shafts, and making the gears mesh with the rack assemblies, the rotating shafts can drive the two gears to rotate, so that the gears can mesh with the rack assemblies and the lifting frame moves up and down; by connecting one end of at least two connecting rods with the bottom of the lifting frame and connecting the other end of the at least two connecting rods with the furnace door assembly, and making the furnace door assembly cover the outside of the feeding port, the lifting frame can drive the furnace door assembly to move up and down through the multiple connecting rods, so that the furnace door assembly can open or close the feeding port, and the inner wall of the heating box is closed, so as to avoid heat loss in the heating box, reduce the energy consumption of the product, and reduce the production cost of the product.

[0016] 2. By installing two sliding rails at the end portions of the heating box and making the two sliding rails pass through the sliding grooves of the two sliding blocks respectively, the sliding blocks can move up and down along the sliding rails, so that the connecting frame and the lifting frame do not deviate when moving up and down, and the stability of the furnace door assembly moving up and down is improved.

[0017] 3. By installing two lifting cylinders at the end portions of the heating box and connecting the two lifting cylinders with the two connecting frames respectively, the heating box supports the two lifting cylinders, so that the two lifting cylinders can drive the two connecting frames to move up and down respectively, and the load of the driving device is reduced, and the use experience of the product is improved.

[0018] 4. The rack body is connected with the adjusting seat, and the rack body is engaged with the gear, so that the adjusting seat supports the rack body, so that the gear can engage the rack body to move; the adjusting nut is fixed on the fixed seat, the adjusting jack is sequentially inserted through the fixed seat and the adjusting nut, and the adjusting jack is attached to the adjusting seat, so that the adjusting jack is connected with the fixed seat through the adjusting nut, so that the adjusting jack is screwed, the adjusting jack pushes the adjusting seat, and then the gap between the rack body and the gear is adjusted, so that the engagement effect of the gear and the rack body is improved.

[0019] 5. The heat insulation cotton is embedded in the furnace door body, so that the heat insulation cotton can fill the furnace door body, so that the heat insulation property of the furnace door body is improved, so that the heat loss in the heating box is avoided, and the use experience of the product is improved.

[0020] 6. The gas collecting cover is connected with the top of the transmission platform, the gas collecting cover is located above the transmission roller, and the gas collecting cover is located on the side of the furnace door assembly away from the heating box, so that when the furnace door assembly is opened, the hot air generated in the heating box can enter the gas collecting cover, so that the hot air is prevented from accumulating at the feeding port, so that the hot air is prevented from scalding the worker, and the use experience of the product is improved; the bottom opening of the exhaust pipe is communicated with the top of the gas collecting cover, the dust cover is connected with the top of the exhaust pipe, and the dust cover is spaced from the exhaust pipe, so that the hot air in the gas collecting cover can be discharged through the exhaust pipe, so that the dust cover can protect the exhaust pipe, and the dust falling into the exhaust pipe is avoided.

[0021] 7. Two lifting screws are installed on the top of the gas collecting cover, so that the gas collecting cover is lifted through the two lifting screws, so that the use experience of the product is improved; two connecting beams are connected with the heating box, two supporting plates are connected with the two connecting beams respectively, and the exhaust pipe is embedded in the supporting grooves of the two supporting plates at the same time, so that the two connecting beams support the two supporting plates respectively, so that the two supporting plates support the exhaust pipe, and the stability of the exhaust pipe is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a perspective view of a roller bottom type heating furnace of the utility model;

[0023] Figure 2 It is Figure 1 A local enlarged view of the place;

[0024] Figure 3 It is Figure 1 A local enlarged view of the place;

[0025] Figure 4It is a perspective view of the roller bottom type heating furnace according to the utility model;

[0026] Figure 5 It is a perspective view of the roller bottom type heating furnace according to the utility model;

[0027] Figure 6 It is a perspective view of the roller bottom type heating furnace according to the utility model;

[0028] Figure 7 It is Figure 6 The local enlarged view of C of the utility model;

[0029] Among them, Figures 1 to 7 The corresponding relationship between the reference signs and the component names in the drawings is as follows:

[0030] 10 transmission platform, 11 transmission roller, 12 heating box, 13 heating wire assembly, 14 feeding port, 15 support beam, 16 lifting frame, 17 rack assembly, 171 fixed seat, 172 adjusting seat, 173 connecting hole, 174 rack body, 175 adjusting nut, 176 adjusting top wire, 18 rotating shaft, 19 gear, 20 connecting rod, 21 furnace door assembly, 211 furnace door body, 212 heat insulation cotton, 22 connecting frame, 23 sliding block, 24 sliding rail, 25 driving device, 26 lifting cylinder, 27 gas collecting cover, 28 exhaust pipe, 29 dust cover, 30 lifting screw, 31 connecting beam, 32 support plate. DETAILED DESCRIPTION

[0031] The utility model will be further explained below combined with specific implementation examples and drawings. Figures 1 to 7 The utility model is not limited to these examples.

[0032] A roller bottom type heating furnace, such as Figures 1 to 7As shown, the roller bottom heating furnace comprises a transmission platform 10, a transmission roller 11, a heating box 12, a heating wire assembly 13, a feeding port 14, a support beam 15, a lifting frame 16, a rack assembly 17, a rotating shaft 18, a gear 19, a connecting rod 20 and a furnace door assembly 21; a plurality of transmission rollers 11 are rotatably connected to the top of the transmission platform 10; the heating box 12 is a hollow cavity, and the heating box 12 is connected to the top of one side of the transmission platform 10; a plurality of heating wire assemblies 13 are installed in the heating box 12, and the heating wire assemblies 13 are located above the transmission rollers 11; the feeding port 14 is arranged at the bottom of the heating box 12, and the feeding port 14 is located above the transmission rollers 11; the support beam 15 is connected to the top of the other side of the transmission platform 10, and the support beam 15 is located on one side of the heating box 12; the lifting frame 16 is located above the support beam 15; two rack assemblies 17 are installed at the two ends of the lifting frame 16; two rotating shafts 18 are rotatably connected to the ends of the heating box 12; two gears 19 are respectively sleeved on the outer sides of the two rotating shafts 18, and the gears 19 are engaged with the rack assemblies 17; at least two connecting rods 20 are connected to the bottom of the lifting frame 16 at one end, and the other ends of the at least two connecting rods 20 pass through the support beam 15; the furnace door assembly 21 is connected to the other ends of the at least two connecting rods 20 at the same time, and the furnace door assembly 21 is arranged outside the feeding port 14.

[0033] The multiple transmission rollers 11 are rotatably connected with the top of the transmission platform 10, so that the transmission platform 10 supports the multiple transmission rollers 11, the multiple transmission rollers 11 can rotate in the transmission platform 10, the transmission roller 11 is rotated, and the workpiece can be moved by the transmission roller 11; the heating box 12 is connected with the top of one side of the transmission platform 10, so that the transmission platform 10 supports the heating box 12, and the heating box 12 and the transmission platform 10 form a heating space; the multiple heating wire assemblies 13 are installed in the heating box 12, and the heating wire assemblies 13 are located above the transmission rollers 11, so that the heating wire assemblies 13 can be electrified and heated in the heating box 12, the workpiece placed on the transmission roller 11 can be heated by the heating wire assemblies 13, and the workpiece is heat treated and processed; the feeding port 14 is arranged at the bottom of the heating box 12, and the feeding port 14 is located above the transmission roller 11, so that when the transmission roller 11 is rotated, the transmission roller 11 can drive the workpiece to move, so that the workpiece can enter the heating box 12 through the feeding port 14, and the workpiece is heated by the heating wire assemblies 13. The support beam 15 is connected with the top of the other side of the transmission platform 10, and the support beam 15 is located on one side of the heating box 12, so that the transmission platform 10 supports the support beam 15, and the stability of the support beam 15 is improved; the lifting frame 16 is located above the support beam 15, and the two rack assemblies 17 are installed at the two ends of the lifting frame 16, so that the lifting frame 16 and the two rack assemblies 17 move up and down synchronously; the two rotating shafts 18 are rotatably connected with the ends of the heating box 12, the two gears 19 are respectively sleeved on the outer sides of the two rotating shafts 18, and the gears 19 are engaged with the rack assemblies 17, so that the heating box 12 can support the two rotating shafts 18, the two rotating shafts 18 are rotated, the rotating shaft 18 drives the gear 19 to rotate, and the gear 19 engages the rack and the lifting frame 16 moves up and down. One end of the at least two connecting rods 20 is connected with the bottom of the lifting frame 16, and the other end of the at least two connecting rods 20 passes through the support beam 15, so that the lifting frame 16 drives the multiple connecting rods 20 to move up and down; the furnace door assembly 21 is connected with the other end of the at least two connecting rods 20, and the furnace door assembly 21 covers the outside of the feeding port 14, so that the multiple connecting rods 20 drive the furnace door assembly 21 to move up and down, the furnace door assembly 21 can open or close the feeding port 14, and the inside of the heating box 12 is closed to avoid heat loss in the heating box 12.

[0034] In the specific use of the product, first, the workpiece is placed on the transmission roller 11; then, the two rotating shafts 18 are rotated simultaneously, so that the two rotating shafts 18 drive the two gears 19 to rotate, thereby enabling the gears 19 to mesh with the rack assemblies 17 and the lifting frame 16 to move upward; when the lifting frame 16 moves upward, the lifting frame 16 drives the furnace door assembly 21 to move upward through the plurality of connecting rods 20, thereby enabling the furnace door assembly 21 to be separated from the feeding port 14 to open the feeding port 14; then, the transmission roller 11 is rotated to drive the workpiece to move, so that the workpiece passes through the feeding port 14 and is located in the heating box 12; then, the rotating shafts 18 are reversely rotated to drive the gears 19 to rotate, thereby enabling the gears 19 to mesh with the rack assemblies 17 and the lifting frame 16 to move downward, so that the lifting frame 16 drives the furnace door assembly 21 to move downward through the plurality of connecting rods 20, thereby enabling the furnace door assembly 21 to cover the feeding port 14 to close the heating box 12; then, the heating wire assembly 13 is powered, so that the heating wire assembly 13 heats the workpiece to complete the heat treatment of the workpiece.

[0035] By the above structure, the two rack assemblies 17 are installed at the two ends of the lifting frame 16, the two rotating shafts 18 are rotatably connected with the ends of the heating box 12, the two gears 19 are respectively sleeved on the outer sides of the two rotating shafts 18, and the gears 19 are meshed with the rack assemblies 17, so that the rotating shafts 18 can drive the two gears 19 to rotate, thereby enabling the gears 19 to mesh with the rack assemblies 17 and the lifting frame 16 to move up and down; one end of the at least two connecting rods 20 is connected with the bottom of the lifting frame 16, the other end of the at least two connecting rods 20 is connected with the furnace door assembly 21, and the furnace door assembly 21 covers the outside of the feeding port 14, so that the lifting frame 16 can drive the furnace door assembly 21 to move up and down through the plurality of connecting rods 20, thereby enabling the furnace door assembly 21 to open or close the feeding port 14, and further enabling the inner wall of the heating box 12 to be closed, so as to avoid the heat loss in the heating box 12, thereby reducing the energy consumption of the product and the production cost of the product.

[0036] In the embodiment of the utility model, as shown in Figures 1 to 7 The roller bottom type heating furnace further comprises connecting frames 22, sliding blocks 23 and sliding rails 24; the two connecting frames 22 are connected with the lifting frame 16; the sliding blocks 23 are provided with sliding grooves, and the two sliding blocks 23 are connected with the two connecting frames 22 respectively; the two sliding rails 24 are installed at the ends of the heating box 12, and the two sliding rails 24 pass through the sliding grooves of the two sliding blocks 23 respectively.

[0037] The two connecting frames 22 are connected with the lifting frame 16, and the two sliding blocks 23 are connected with the two connecting frames 22 respectively, so that the lifting frame 16 can move up and down synchronously with the two connecting frames 22, the connecting frame 22 can drive the sliding block 23 to move up and down, the connecting frame 22 and the lifting frame 16 can avoid deviation when moving up and down, and the stability of the furnace door assembly 21 when moving up and down is improved.

[0038] In the embodiment of the utility model, as shown in Figures 1 to 7 The driving device 25 is installed at the end of the heating box 12, and the driving device 25 is connected with the two rotating shafts 18 simultaneously, so that the heating box 12 supports the driving device 25, the driving device 25 can drive the two rotating shafts 18 to rotate, and power is provided for the rotating rotating shaft 18.

[0039] The two lifting cylinders 26 are installed at the end of the heating box 12, and the two lifting cylinders 26 are connected with the two connecting frames 22 respectively, so that the heating box 12 supports the two lifting cylinders 26, the two lifting cylinders 26 can drive the two connecting frames 22 to move up and down respectively, the load of the driving device 25 is reduced, and the use experience of the product is improved.

[0040] In the embodiment of the utility model, as shown in Figures 1 to 7 The rack assembly 17 comprises a fixed seat 171, an adjusting seat 172, a connecting hole 173, a connecting bolt, a rack body 174, an adjusting nut 175 and an adjusting jack 176; the fixed seat 171 is installed on the lifting frame 16; the adjusting seat 172 is located on the side of the fixed seat 171 close to the heating box 12; the connecting hole 173 is in a strip shape, and a plurality of connecting holes 173 are arranged in the adjusting seat 172; a plurality of connecting bolts pass through the plurality of connecting holes 173 respectively, and the plurality of connecting bolts are embedded in the heating box 12; the rack body 174 is connected with the adjusting seat 172, and the rack body 174 is engaged with the gear 19; the adjusting nut 175 is internally threaded, and the adjusting nut 175 is fixed on the fixed seat 171; the adjusting jack 176 is externally threaded, and the adjusting jack 176 passes through the fixed seat 171 and the adjusting nut 175 in sequence, and the adjusting jack 176 is in close contact with the adjusting seat 172; wherein the internal thread and the external thread are matched.

[0041] The fixing base 171 is installed on the lifting frame 16, so that the lifting frame 16 supports the fixing base 171, thereby improving the stability of the fixing base 171; the adjusting base 172 is located on one side of the fixing base 171 close to the heating box 12, is in a strip shape, the connecting bolt passes through the connecting hole 173, and is embedded in the heating box 12, so that the adjusting base 172 is fixed on the heating box 12 through the connecting bolt, so that the connecting bolt can move in the connecting hole 173, thereby adjusting the position of the adjusting base 172 on the heating box 12. The rack body 174 is connected with the adjusting base 172, and the rack body 174 is engaged with the gear 19, so that the adjusting base 172 supports the rack body 174, thereby enabling the gear 19 to engage the rack body 174 to move; the adjusting nut 175 is fixed on the fixing base 171, the adjusting jack 176 passes through the fixing base 171 and the adjusting nut 175 in sequence, and the adjusting jack 176 is attached to the adjusting base 172, so that the adjusting jack 176 is threadedly connected with the fixing base 171 through the adjusting nut 175, thereby rotating the adjusting jack 176 to drive the adjusting base 172, thereby adjusting the gap between the rack body 174 and the gear 19, so as to improve the engagement effect of the gear 19 and the rack body 174.

[0042] In the embodiment of the utility model, as shown in Figures 1 to 7 The furnace door assembly 21 comprises a furnace door body 211 and a heat insulation cotton 212; the furnace door body 211 is a hollow cavity, and the furnace door body 211 is connected with the other ends of the at least two connecting rods 20; the heat insulation cotton 212 is embedded in the furnace door body 211.

[0043] The furnace door body 211 is arranged as a hollow cavity, and the furnace door body 211 is connected with the other ends of the plurality of connecting rods 20, so that the furnace door body 211 has an accommodation space, thereby enabling the plurality of connecting rods 20 to drive the furnace door body 211 to move up and down; the heat insulation cotton 212 is embedded in the furnace door body 211, so that the heat insulation cotton 212 can fill the furnace door body 211, thereby improving the heat insulation property of the furnace door body 211, and avoiding heat loss in the heating box 12, thereby improving the use experience of the product.

[0044] In the embodiment of the utility model, as shown in Figures 1 to 7As shown in the figure, the roller bottom heating furnace further comprises: a gas collecting hood 27, an exhaust pipe 28 and a dust cover 29; the gas collecting hood 27 is a hollow cavity with an opening at the bottom, the gas collecting hood 27 is connected to the top of the transmission platform 10, the gas collecting hood 27 is located above the transmission roller 11, and the gas collecting hood 27 is located on the side of the furnace door assembly 21 away from the heating box 12; the exhaust pipe 28 is a hollow cavity with openings at both ends, the bottom opening of the exhaust pipe 28 is in communication with the top of the gas collecting hood 27; the dust cover 29 is connected to the top of the exhaust pipe 28, and there is a gap between the dust cover 29 and the exhaust pipe 28.

[0045] By connecting the gas collecting hood 27 to the top of the transmission platform 10, locating the gas collecting hood 27 above the transmission roller 11, and locating the gas collecting hood 27 on the side of the furnace door assembly 21 away from the heating box 12, when the furnace door assembly 21 is opened, the hot air generated in the heating box 12 can enter the gas collecting hood 27, thereby preventing the hot air from accumulating at the feed inlet 14, avoiding scalding of the worker by the hot air, and improving the use experience of the product; by connecting the bottom opening of the exhaust pipe 28 to the top of the gas collecting hood 27, connecting the dust cover 29 to the top of the exhaust pipe 28, and leaving a gap between the dust cover 29 and the exhaust pipe 28, the hot air in the gas collecting hood 27 can be discharged through the exhaust pipe 28, thereby realizing the protection of the exhaust pipe 28 by the dust cover 29, and avoiding dust from falling into the exhaust pipe 28.

[0046] In the embodiment of the utility model, as shown in the figure, Figures 1 to 7 The roller bottom heating furnace further comprises: lifting screws 30, connecting beams 31 and support plates 32; two lifting screws 30 are installed on the top of the gas collecting hood 27; two connecting beams 31 are connected to the heating box 12, and the two connecting beams 31 are located above the gas collecting hood 27; the support plates 32 are provided with support grooves, two support plates 32 are respectively connected to the two connecting beams 31, and the exhaust pipe 28 is simultaneously embedded in the support grooves of the two support plates 32.

[0047] By installing two lifting screws 30 on the top of the gas collecting hood 27, the gas collecting hood 27 can be lifted by the two lifting screws 30, thereby improving the use experience of the product; by connecting the two connecting beams 31 to the heating box 12, connecting the two support plates 32 to the two connecting beams 31, and embedding the exhaust pipe 28 in the support grooves of the two support plates 32, the two connecting beams 31 can support the two support plates 32, thereby supporting the exhaust pipe 28 by the two support plates 32, and improving the stability of the exhaust pipe 28.

[0048] In the description of the utility model, the term "a plurality of" refers to two or more than two, unless otherwise expressly limited, the term "up", "down" and the like indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the device or element referred to must have a particular orientation, a particular orientation and operation, therefore, cannot be understood as a limitation on the utility model;The terms "connection", "installation", "fixing" and the like should be understood broadly, for example, "connection" can be fixedly connected, can also be detachably connected, or integrally connected;It can be directly connected, or indirectly connected through an intermediate medium.

[0049] In the description of the utility model, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the utility model, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A roller hearth furnace characterized by, The roller bottom heating furnace comprises: a transmission platform; a plurality of transmission rollers rotatably connected to the top of the transmission platform; a heating box, which is a hollow cavity, connected to the top of one side of the transmission platform; a plurality of heating wire assemblies installed in the heating box and located above the transmission rollers; a feeding port provided at the bottom of the heating box and located above the transmission rollers; a support beam connected to the top of the other side of the transmission platform and located on one side of the heating box; a lifting frame located above the support beam; two rack assemblies installed at the two ends of the lifting frame; two rotating shafts rotatably connected to the ends of the heating box; two gears respectively sleeved on the outer sides of the two rotating shafts and engaged with the rack assemblies; at least two connecting rods, one end of each of which is connected to the bottom of the lifting frame and the other end of each of which penetrates through the support beam; a furnace door assembly connected to the other ends of the at least two connecting rods and covering the outside of the feeding port.

2. A roller hearth furnace as defined in claim 1, wherein The roller bottom heating furnace further comprises: two connecting frames connected to the lifting frame; two sliding blocks provided with sliding grooves and connected to the two connecting frames respectively; two slide rails installed at the ends of the heating box and penetrating through the sliding grooves of the two sliding blocks respectively.

3. A roller hearth furnace as defined in claim 2, wherein, The roller bottom heating furnace further comprises: a driving device installed at the ends of the heating box and connected to the two rotating shafts simultaneously; two lifting cylinders installed at the ends of the heating box and connected to the two connecting frames respectively.

4. A roller hearth furnace as defined in claim 3, wherein, The rack assembly comprises: a fixed seat installed on the lifting frame; an adjusting seat located on the side of the fixed seat close to the heating box; a plurality of connecting holes in the form of long strips provided in the adjusting seat; a plurality of connecting bolts penetrating through the connecting holes and embedded in the heating box; a rack body connected to the adjusting seat and engaged with the gear; an adjusting nut provided with internal threads and fixed on the fixed seat; an adjusting top screw provided with external threads on the outer wall thereof, which penetrates through the fixed seat and the adjusting nut in sequence and is in close contact with the adjusting seat; wherein the internal threads are matched with the external threads.

5. A roller hearth furnace as defined in claim 4, wherein, The furnace door assembly comprises: a furnace door body, which is a hollow cavity, connected to the other ends of the at least two connecting rods simultaneously; heat insulation cotton embedded in the furnace door body.

6. The roller hearth furnace of claim 1 wherein, The roller bottom heating furnace further comprises: A gas collecting cover, which is a hollow cavity with an opening at the bottom, is connected to the top of the transmission platform, is above the transmission roller, and is on the side of the furnace door assembly away from the heating box; An exhaust pipe, which is a hollow cavity with openings at both ends, has its bottom opening in communication with the top of the gas collecting cover; A dust cover is connected to the top of the exhaust pipe with a gap between the dust cover and the exhaust pipe.

7. A roller hearth furnace as defined in claim 6, wherein, The roller bottom heating furnace further comprises: Two lifting screws are installed on the top of the gas collecting cover; Two connecting beams are connected to the heating box and are above the gas collecting cover; Two support plates are provided with support grooves and are connected to the two connecting beams, and the exhaust pipe is embedded in the support grooves of the two support plates.

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