CN112050648B

CN112050648B - Conveying device for bidirectional conveying of materials in kiln, special-shaped roller and kiln

Info

Publication number: CN112050648B
Application number: CN201910490355.6A
Authority: CN
Inventors: 石华山
Original assignee: Oped Servo Motor Energy Saving System Co ltd
Current assignee: Oped Servo Motor Energy Saving System Co ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2022-08-19
Anticipated expiration: 2039-06-06
Also published as: CN112050648A

Abstract

The invention discloses a conveying device for conveying materials in a kiln in a bidirectional mode, a special-shaped roller and a kiln. The invention relates to a transmission device for bidirectional conveying materials in a kiln, which comprises: the first conveying device is used for conveying materials from one end of the kiln to the other end of the kiln and comprises a plurality of special-shaped rollers; the second conveying device is used for conveying materials from the other end of the kiln to one end of the kiln and comprises a plurality of special-shaped rollers; wherein the material to be sintered on the second conveying device from the other end of the kiln is preheated by heat release while the first conveying device conveys the material sintered in the high-temperature sintering area of the kiln towards the other end of the kiln; wherein the material to be sintered on the first conveyor device from one end of the kiln is preheated by heat release while the second conveyor device conveys the material which has been sintered in the high-temperature sintering zone of the kiln towards one end of the kiln.

Description

Conveying device for bidirectional conveying of materials in kiln, special-shaped roller and kiln

Technical Field

The invention relates to the technical field of sintered ferrite permanent magnet kilns, in particular to a conveying device for bidirectional conveying materials in a kiln, a special-shaped roller and the kiln.

Background

The existing sintering kiln of ferrite permanent magnets is in a tunnel shape, and the wall body of the kiln is composed of various heat-insulating and heat-conducting materials such as light clay bricks, microporous heat-insulating bricks, light high-alumina, mullite and the like. The hollow part of the kiln is a furnace chamber, and the furnace chamber extends along the length direction and penetrates through two ends of the kiln to form an inlet and an outlet. The kiln is divided into a preheating zone, a medium-temperature sintering zone, a high-temperature sintering zone and a cooling zone from an inlet to an outlet according to the temperature, wherein the preheating zone and the high-temperature sintering zone are provided with electric heating rods at the upper part and the bottom of the inner wall of the furnace chamber.

The material to be sintered is conveyed in a single direction along the direction from the inlet to the outlet of the furnace chamber by the conveying device and undergoes the processes of preheating → sintering → cooling. The conveying device generally comprises a power module and a plurality of conveying rollers, the rollers are rotatably arranged on a bearing support, the bearing support is fixed on a rack through a mounting block, a tray for loading materials is placed on the rollers, the power module (such as a motor) drives the rollers to rotate, and the rollers realize that the tray moves in a furnace chamber through friction transmission.

The existing ferrite permanent magnet sintering kiln is provided with a unidirectional conveyer belt, a blowing device is arranged at a discharge port or a position nearby, and an air extractor is arranged at a feed port or a position nearby. The air blowing device includes a blower, an air duct, which may be a plurality of air ducts, connected to the cooling area of the cavity. The air extraction device comprises an air extraction motor, an air extraction pipeline and a filtering device, and the air extraction pipeline is connected with the preheating zone; when the air-cooling type oven works, an air blower of the air-blowing device conveys outside air to a cooling area of the oven cavity, and the air is pumped out from the preheating area by the air pumping device, so that the air flows from the cooling area to the high-temperature area, then flows to the preheating area and is discharged to the outside. In the oven cavity, the air moves in the opposite direction to the direction of transport of the material. In the high-temperature sintering zone, oxygen in the air and the materials are consumed by chemical reaction. However, since the oxygen content in the air is only 21%, more heat energy is carried away by the gas which does not participate in the reaction in the gas flow and is discharged to the atmosphere, and the part of heat energy is not utilized. The exhausted air passes through a filter device and enters the atmosphere.

Each roller of the existing kiln is a cylinder with the same diameter, and the diameter and the rotating direction of all the rollers are the same, so that only one-way transmission of materials can be realized. In the process of cooling the material after sintering in the high-temperature area, heat is dissipated to the outside through air and is not utilized, so that the material is not beneficial to energy conservation and environmental protection.

Disclosure of Invention

The invention aims to provide a conveying device for conveying materials in a kiln in a two-way manner, a special-shaped roller and the kiln, which are used for realizing the full utilization of heat energy by conveying the materials in the kiln in the two-way manner.

According to one aspect of the invention, a conveying device for conveying materials in a kiln in two directions is provided, which comprises:

at least one first conveyor comprising a plurality of profiled rollers for conveying material from one end of the kiln to the other end of the kiln;

at least one second conveyor comprising a plurality of profiled rollers for conveying material from the other end of the kiln to one end of the kiln;

wherein the material to be sintered on the second conveying device from the other end of the kiln is preheated by heat release while the first conveying device conveys the material sintered in the high-temperature sintering area of the kiln towards the other end of the kiln;

wherein the material to be sintered on the first conveyor from the end of the kiln is preheated by heat release while the second conveyor conveys the material that has been sintered in the high-temperature sintering zone of the kiln towards the end of the kiln.

Preferably, the plurality of profiled rollers of the first conveyor are staggered with the plurality of profiled rollers of the second conveyor.

Preferably, each profiled roller of the first conveyor and each profiled roller of the second conveyor comprise first and second roller sections of unequal diameter connected together; the first roller section is used for conveying materials, and the diameter of the first roller section is larger than that of the second roller section.

Preferably, the first roller section is arranged in the middle of each special-shaped roller, and the second roller sections are arranged on two sides of the first roller section respectively.

Preferably, the second roller section is provided on one side of each profiled roller and the first roller section is provided on the other side of each profiled roller.

Preferably, the first conveyor and the second conveyor are an interlaced bidirectional conveyor belt comprising: the first transmission shaft of the first conveying device is positioned on one side of the kiln body; the second transmission shaft of the second transmission device is positioned on the other side of the kiln body; a first transmission device mounted on the first transmission shaft; a second transmission mounted on the second transmission shaft; the first transmission device and the second transmission device are arranged in a staggered mode, and each transmission device is provided with the special-shaped roller.

According to a second aspect of the present invention, there is provided a profiled roller for a conveyor for bidirectional transport of material in a kiln, the conveyor comprising: at least one first conveyor comprising a plurality of profiled rollers for conveying material from one end of the kiln to the other end of the kiln; at least one second conveyor comprising a plurality of profiled rollers for conveying material from the other end of the kiln to one end of the kiln; when the first conveying device conveys the materials sintered in the high-temperature sintering area of the kiln towards the other end of the kiln, preheating the materials to be sintered on the second conveying device from the other end of the kiln through heat release; preheating the material to be sintered on the first conveying device from one end of the kiln through heat release when the second conveying device conveys the material sintered in the high-temperature sintering area of the kiln towards one end of the kiln;

wherein each of the profiled rollers comprises: the roller comprises a first roller section and a second roller section which are connected together and have unequal diameters, wherein the first roller section is used for conveying materials and has a diameter larger than that of the second roller section.

Preferably, the first roller section is arranged in the middle of each profiled roller, and the second roller sections are respectively arranged on two sides of the first roller section.

Preferably, one side of each profiled roller is provided with the second roller section and the other side is provided with the first roller section.

According to a third aspect of the invention, there is provided a kiln for bi-directional transport of material, comprising:

a kiln body;

the conveying device is arranged on the kiln body;

and the exhaust chimneys are arranged at the two ends of the kiln body and are used for outwards discharging filtered waste gas generated in the material combustion process.

Compared with the prior art, the invention realizes bidirectional material conveying from two opposite directions through the special-shaped rollers, so that the material to be sintered from one direction can be preheated by utilizing the heat released by cooling the sintered material (such as ferrite permanent magnet) from the other direction, and the heat energy of the kiln can be fully utilized. Compared with the prior art, the invention can save about 30% of energy consumption under the condition of sintering the same ferrite permanent magnet.

The present invention will be described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of a transmission apparatus according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a first embodiment of the profiled roll of the present invention;

FIG. 3 is an enlarged partial schematic view of a profiled roller A-A of the first embodiment of the present invention;

FIG. 4 is a schematic view of the transmission of the first embodiment of the present invention;

FIG. 5 is an exploded schematic view of the transmission of the first embodiment of the present invention;

FIG. 6 is a schematic view of the construction of a kiln system according to a first embodiment of the invention;

FIG. 7 is a sectional view of the high temperature zone of the kiln system according to the first embodiment of the invention;

FIG. 8 is a schematic structural diagram of a transmission device according to a second embodiment of the present invention;

FIG. 9 is a sectional view of the high temperature zone of the kiln system according to a second embodiment of the invention;

FIG. 10 is a schematic view of a second embodiment of the profiled roll of the present invention;

FIG. 11 is an enlarged partial schematic view of a second embodiment of the profiled roller A-A of the present invention.

Description of reference numerals: 1-a frame; 2-a special-shaped roller transmission device; 3-furnace body; 4-a special-shaped roller; 41-a first roller section; 42-a second roller section; 43-special-shaped roller assembling hole sites; 5-exhaust chimney; 6-cleaning the opening; 7-an oxygen injection port; 8-an electric heating rod; 9-a firewall; 10-a heat exchange zone; 11-high temperature zone; 12-a mounting block; 13-heat preservation area; 14-activated carbon filtration, 15-tray; 16-oxygen generator.

Detailed Description

The invention is provided with two sets of conveying devices, and the conveying directions of the two sets of conveying devices are opposite. The mode of the existing unidirectional feeding is improved into bidirectional feeding, so that the heat in the product cooling process is effectively utilized. The sintering of one side is completed, and the material entering the cooling stage preheats the material of the other side ready to enter the sintering stage, so that on one hand, the energy is saved, on the other hand, the productivity can be improved, and the production efficiency is improved. Energy consumption can be saved by more than 30%. The two sets of transmission devices are arranged in a staggered manner, rather than side by side. The existing kiln is conveniently transformed, the width of the furnace chamber of the existing kiln is not required to be enlarged, the existing kiln is continuously used, only a conveying device comprising special-shaped rollers for bidirectional conveying materials is required to be arranged, the width of the tray is reduced, the tray moves in the furnace chamber in the opposite direction without interference, and the cost for improving the kiln is reduced.

Fig. 1 shows a conveying device for conveying materials in two directions in a kiln, which comprises: at least one first conveyor means (for conveying material on the upper tray 15 in fig. 1) comprising a plurality of profiled rollers 4 for conveying material from one end of the kiln (left end in fig. 1) to the other end of the kiln (right end in fig. 1); at least one second conveyor means (for conveying the material on the lower tray 15 in fig. 1) comprising a plurality of profiled rollers 4 for conveying the material from the other end of the kiln to one end of the kiln; wherein the material to be sintered on the second conveyor from the other end of the kiln is preheated by heat release while the first conveyor conveys the material that has been sintered in the high-temperature sintering zone of the kiln (see high-temperature zone 16 in fig. 6) towards the other end of the kiln; wherein the material to be sintered on the first conveyor from the end of the kiln is preheated by heat release while the second conveyor conveys the material that has been sintered in the high-temperature sintering zone of the kiln towards the end of the kiln.

The plurality of special-shaped rollers of the first conveying device and the plurality of special-shaped rollers of the second conveying device are arranged in a staggered mode, so that materials can be conveyed bidirectionally by the aid of the special-shaped rollers.

Referring to fig. 1, each profiled roller of the first conveyor and each profiled roller of the second conveyor of the present invention comprise a first roller section 41 and a second roller section 42 of unequal diameter connected together; the first roller section 41 is used for conveying material and has a diameter larger than the diameter of the second roller section 42.

As shown in fig. 1, the first roller section 41 is disposed in the middle of each profiled roller, and the second roller sections 42 are disposed on both sides of the first roller section 41.

Furthermore, as shown in fig. 8, the first roller section 41 may be provided on one side of each profiled roller, and the second roller section 42 may be provided on the other side of each profiled roller.

The invention relates to a transmission device for bidirectional material conveying in a kiln, which is a staggered power type roller conveyer belt utilizing two transmission shafts, as shown in figure 1, and comprises: a first transmission shaft 22-1 of a first conveying device positioned at one side of the kiln body; a second transmission shaft 22-2 of a second transmission device positioned at the other side of the kiln body; a first transmission 23-1 mounted on the first transmission shaft 22-1; a second transmission 23-2 mounted on the second transmission shaft 22-2; the first transmission device 23-1 and the second transmission device 23-2 are arranged in a staggered mode, and each transmission device is provided with a special-shaped roller 4.

The profiled roller 4 of the first transmission and the profiled roller 4 of the second transmission of the invention each comprise a first (small diameter) and a second (large diameter) unequal-diameter roller section (small diameter) 42 and joined together, the second roller section also being called a projection 41 dedicated to the transport of material (for example a ferrite permanent magnet-loaded tray 15) having a diameter greater than that of the first roller section. The bulges 41 of all the first transmission devices form a roller way of the first conveying device; all the projections 41 of the second transmission constitute the roller table 5 of the second conveyor.

Referring to fig. 4 and 5, the first transmission 23-1 and the second transmission 23-2 of the present invention are identical in structure, and for the sake of simplicity, only the first transmission 23-1 will be described below.

The first transmission 23-1 includes: a profiled roller 4 located in the middle; a first power transmission sleeve 235 connected to one end of the shaped roller 4, having a sleeve connected to one end of the shaped roller 4 and a power transmission shaft 241 connected to the sleeve; a first mounting seat 233 for supporting a power transmission shaft 241 of a first power transmission sleeve 235; a first bevel gear 231 connected to a power transmission shaft 241 of a first power transmission sleeve 235 supported by the first mounting seat 233, the first bevel gear 231 engaging with a second bevel gear 232 carried by the first transmission shaft 22-1; a second power transmission sleeve 236 connected to the other end of the profile roller, having a sleeve connected to the other end of the profile roller 4 and a power transmission shaft connected to the sleeve; and a second mount 234 for supporting the power transmission shaft of a second power transmission sleeve 236.

The first mount 233 serves as a bearing housing in which

bearings

237 and 238 are housed in a hollow body, and the power transmission shaft 241 of the first power transmission sleeve 235 passes out of the first mount 233 via the

bearings

237 and 238.

The second mount 234 also serves as a bearing seat, with

bearings

239 and 240 in the hollow body, and the power transmission shaft of the second power transmission sleeve 236 passing out of the first mount 234 via the

bearings

239 and 240.

In addition, the first transmission 23-1 may further include a positioning ring 242 and a nut 243, the positioning ring 242 being mounted between the first mounting seat 233 and the first helical gear 231, the nut 243 locking the power transmission shaft 241 passing through the first helical gear 231.

In the second embodiment shown in fig. 10-11, the profiled roll 4 of the present embodiment can be seen as a modified design of the first embodiment. The special-shaped roller 4 of the invention can also increase or decrease the diameter from the axial central point to one end in the axial direction, so as to achieve the purpose of taking the middle as a critical point and coaxially increasing the diameter from the middle to the two ends. Of course, it can be considered that two rolls with different diameters are spliced together, but the rolls are required to support a batch of material, and the bending strength of the spliced rolls is not equal to that of the same roll. The third difference between this embodiment and the first embodiment is that the roller is divided into three sections, the middle section is slightly larger, and the two ends are slightly smaller. In the assembly difference, the two sections of the profiled roller 4 of the first embodiment are mounted with the same diameter.

In addition, the invention also provides a kiln for conveying materials in two directions, which comprises a kiln body and a conveying device, wherein the kiln body is provided with a conveying device; a kiln body; the conveyor of any one of claims 1 to 9 disposed on a kiln body; and the exhaust chimneys 5 are arranged at the two ends of the kiln body and are used for outwards discharging filtered waste gas generated in the material combustion process.

In summary, the transmission device for bidirectional material conveying in the kiln of the present invention employs the power type roller conveyor belt, corresponding holes are provided on the side walls of both sides of the furnace chamber of the kiln, the frame is provided with the mounting block, the bearing block is fixedly mounted on the mounting block of the frame, the roller passes through the hole and is fixedly connected with the bearing bush, one end of the bearing bush is in the shape of a sleeve, and is fixedly connected with the roller through a bolt and a pin, the other end of the bearing bush is in the shape of a cylinder, and is rotatably mounted on the bearing block, and the cylinder of the bearing bush passes through the bearing block and is fixedly connected with the bearing bush and the helical gear. Two transmission shafts are arranged on two sides of the kiln, the installation direction of the transmission shafts is the same as the extension direction of the kiln, transmission shaft bevel gears matched with the bearing bush bevel gears are installed on the transmission shafts, the first roller is connected with the transmission shaft on the left side, the second roller is connected with the transmission shaft on the right side, and by analogy, the two transmission shafts respectively drive the rollers to rotate through the bevel gears, so that the rotation directions of the two adjacent rollers are opposite. The rollers are different from the traditional equal-diameter circular tubes, the diameter of the left part of the first roller in the furnace cavity is larger than that of the right part of the first roller, the diameter of the right part of the second roller in the furnace cavity is larger than that of the left part of the second roller, and the like. The tray on the left of the oven chamber spans at least 5 rollers and contacts at least 3 spaced rollers with large diameter to move under the friction of the rollers. The three rollers are arranged according to the transmission of the front roller, and the rotating directions are the same. The right tray in the furnace chamber is conveyed to the other direction. The pallets on the two sides do not interfere with each other in the transportation process.

The profile roller conveyor of the present invention is further described in two embodiments with reference to fig. 1-11.

The kiln system applying the special-shaped roller 21 comprises a frame 1, a transmission device 2, a furnace body 3, an oxygen generator 16, an exhaust gas chimney 5, a cleaning port 6, an oxygen injection port 7, an electric heating rod 8 and a firewall 9, as shown in figure 6. The transfer device 2 is arranged above the frame 1. The transmission shafts 22 are arranged on two sides of the furnace body 3 and drive the special-shaped rollers 4 to rotate in the furnace body 3. The furnace body 3 is divided into a plurality of sections according to the working temperature. One section is equipped with many electric rods 8 in the middle of furnace body 3, is equipped with at the both ends of electric rod 8 and prevents hot wall 9, prevents hot wall 9 main function and stores the heat, prevents calorific loss to supply the material sintering. The main place for the sintering reaction of the materials is between the fire-proof walls 9, which can be called as high temperature zone. The oxygen generator 16 is arranged at the outer side of the furnace body corresponding to the high-temperature area, and oxygen enters the furnace body 3 through the oxygen injection port 8 to react with the materials. Because the kiln is in a bidirectional feeding working mode, the two ends of the kiln body 3 are provided with the waste gas discharge chimneys 5, and waste gas generated in the material sintering process is adsorbed by activated carbon and then discharged to the outside. A plurality of cleaning ports 6 are arranged below the furnace body 3, and if residual waste materials exist in the furnace body 3, the residual waste materials can be cleaned accordingly. The kiln system with bidirectional feeding can fully utilize heat as soon as the kiln system is good, materials coming out of the high-temperature area can preheat the materials to be fed into the high-temperature area, and the heat exchange or heat transfer effect is achieved, so that the kiln system is improved in the aspects of energy saving and capacity improvement.

In a first embodiment of the invention, as shown in fig. 1, the profiled roller conveyor of the invention comprises a first transmission shaft 22-1 of a first conveyor located at one side of the kiln body; a second transmission shaft 22-2 of a second transmission device positioned at the other side of the kiln body; a first transmission 23-1 mounted on the first transmission shaft 22-1; a second transmission 23-2 mounted on the second transmission shaft 22-2; the first transmission device 23-1 and the second transmission device 23-2 are arranged in a staggered mode, and each transmission device is provided with a special-shaped roller 4.

As shown in fig. 2, the special-shaped roller 4 of the present invention is different from the conventional constant diameter circular tube design, a section of the special-shaped roller 4 in the furnace chamber is thickened in the radial direction near the inner wall of the furnace chamber, and the length is about half of the length of the furnace chamber, that is, the special-shaped roller 4 is provided with a protrusion 41 from the center to the left or right, and the length of the protrusion is about half of the width of the furnace chamber.

As shown in fig. 4 and 5, the first transmission 23-1 includes: a profiled roller 4 located in the middle; a first power transmission sleeve 235 connected to one end of the shaped roller 4, having a sleeve connected to one end of the shaped roller 4 and a power transmission shaft 241 connected to the sleeve; a first mount 233 for supporting a power transmission shaft 241 of a first power transmission sleeve 235; a first helical gear 231 coupled to a power transmission shaft 241 of a first power transmission sleeve 235 supported by the first mounting seat 233, the first helical gear 231 being engaged with a second helical gear 232 carried by the first transmission shaft 22-1; a second power transmission sleeve 236 connected to the other end of the shaped roller, having a sleeve connected to the other end of the shaped roller 4 and a power transmission shaft connected to the sleeve; and a second mount 234 for supporting the power transmission shaft of a second power transmission sleeve 236.

The motor drives the rotating shaft 22-1 to rotate, and the special-shaped roller 4 is driven to rotate under the action of the helical gear rotating assemblies (namely the first helical gear 231 and the second helical gear assembly 232). It should be noted that, the middle of the special-shaped roller 4 of the present embodiment is provided with the protrusion 41 on the left or right, the two adjacent special-shaped rollers 4 need to be assembled in a staggered manner, and similarly, the helical tooth rotating assemblies also need to be assembled in a staggered manner, that is, the protrusions 41 of the two adjacent special-shaped rollers 4 are arranged oppositely, one protrusion 41 is on the left, the other protrusion 41 is on the right, and the helical tooth rotating assembly 23 is also the same, the helical tooth rotating assembly of the protrusion 41 on the left special-shaped roller is installed on the left, the driven bearing assembly is installed on the right, the helical tooth rotating assembly of the protrusion 41 on the right special-shaped roller is installed on the right, and the driven bearing assembly is installed on the left. Of course, the mounting of the helical tooth rotating assembly and the driven bearing assembly may be reversed. The motors (not shown in the figure) on the two sides are simultaneously started, and the rotation directions of the two adjacent special-shaped rollers 4 are opposite, so that the working state of bidirectional feeding can be achieved.

The second transmission 23-1 has the same structure as the first transmission, and thus, the description thereof will be omitted.

In the second embodiment of the invention, the profiled roll 4 can be regarded as a modified design of the first embodiment. As shown in fig. 8-11, the profiled roller 4 of the present invention may also increase or decrease in diameter from an axial center point to one axial end, i.e., concentric but different diameters on either side of the roller, with the central cross-section of the roller being the critical point. It can also be considered that two rollers with different diameters are spliced together, but the rollers are required to support a batch of material, and the bending strength of the spliced roller is not equal to that of the same roller. This embodiment differs from the first embodiment in that the first embodiment can be regarded as dividing the roller 4 into three sections, the middle section (i.e. the first roller section 41) being slightly larger and the two ends (i.e. the second roller section 42) being slightly smaller, while this embodiment corresponds to a section being slightly larger and a section being slightly smaller. The length of the intermediate protuberance 41 of the profiled roll 4 of the first embodiment ranges within the width of the furnace chamber, whereas the length of the protuberance 41 of the profiled roll 4 of the present embodiment corresponds to half the radial length of the profiled roll 4.

Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.

Claims

1. A conveying device for conveying materials in a kiln in two directions comprises:

at least one second conveying device which is used for conveying materials from the other end of the kiln to one end of the kiln and comprises a plurality of special-shaped rollers, wherein the special-shaped rollers of the second conveying device and the special-shaped rollers of the first conveying device are arranged in a staggered mode;

each profiled roller of the first conveyor and each profiled roller of the second conveyor comprise a first roller section and a second roller section of unequal diameter connected together; the first roller section is used for conveying materials, and the diameter of the first roller section is larger than that of the second roller section; a first roller segment of a first conveyor conveying material is adjacent to a first roller segment of a second conveyor conveying material;

preheating the material to be sintered on the first roller section of the second conveying device from the other end of the kiln through heat release when the first roller section of the first conveying device conveys the material sintered in the high-temperature sintering area of the kiln towards the other end of the kiln;

when the first roller section of the second conveying device conveys the materials which are sintered in the high-temperature sintering area of the kiln towards one end of the kiln, the materials to be sintered on the first roller section of the first conveying device from one end of the kiln are preheated through heat release.

2. A transport apparatus as claimed in claim 1 wherein each profiled roller has the first roller section disposed in the middle and the second roller section disposed on either side of the first roller section.

3. A conveyor as claimed in claim 1 wherein each profiled roller is provided with the second roller section on one side and the first roller section on the other side.

4. A transfer device according to claim 1, 2 or 3, wherein the first and second conveyor devices are staggered powered roller conveyor belts utilizing two drive shafts.

5. The transfer device of claim 4, wherein the cross-powered roller conveyor belt comprises:

the first transmission shaft of the first conveying device is positioned on one side of the kiln body;

the second transmission shaft of the second transmission device is positioned on the other side of the kiln body;

a first transmission device mounted on the first transmission shaft;

a second transmission mounted on the second transmission shaft;

the first transmission device and the second transmission device are arranged in a staggered mode, and each transmission device is provided with the special-shaped roller.

6. A kiln for bidirectional conveying materials comprises a kiln body;

a kiln body;

the conveyor of any one of claims 1 to 5 disposed on a kiln body;