Belt type roasting machine trolley body with bionic rib plates and belt type roasting machine

Abstract

The invention discloses a belt type roasting machine trolley body with bionic rib plates and a belt type roasting machine. The roasting machine trolley body comprises two oppositely-arranged wall plates, a plurality of cross beams connected between the two wall plates and rib plates connected between every two adjacent cross beams, and the cross beams comprise the end cross beams located on the end faces and the middle cross beams located in the middle. The cross section of the middle cross beam comprises a first trapezoid, a first polygon, a rectangle, a second polygon and a second trapezoid which are sequentially arranged, each of the first polygon and the second polygon comprises a top edge, a bottom edge and two side edges connected with the top edge and the bottom edge, and the top edge and the bottom edge are both straight lines; the two side edges are lemniscate connecting the rectangle and the bottom face of the first trapezoid or the bottom face of the second trapezoid with continuous curvature, all the cross sections of the rib plate in the axial direction are oval, and the centers of all the oval in the axial direction are collinear with the axis of the rib plate. The belt type roasting machine trolley body can ensure that the temperature difference between the upper surface and the lower surface of the trolley body is basically unchanged, so that the longitudinal deformation of the trolley body and the light weight of the trolley body are reduced, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of roasting machine structures, in particular to a belt roasting machine trolley body with bionic ribs and a belt roasting machine. Background Art

[0002] The roasting machine is an important equipment in the steel sintering production process, and the sintering process consumes a lot of energy. Against the background of the green and low-carbon transformation of the steel industry, the expansion and transformation of the roasting machine trolley has become the key to improving the production efficiency of the roasting machine and reducing overall energy consumption.

[0003] The trolley is one of the important components of the roasting machine. The investment cost of the trolley accounts for 40%-50% of the total cost of the roasting machine. In addition, the trolley is subjected to alternating high-temperature loads and the gravity of the sintered material during operation, which can easily cause the trolley body to collapse or even break. This is mainly caused by the longitudinal deformation and fatigue induced by the temperature difference between the upper and lower surfaces of the trolley body when the trolley body is subjected to alternating high-temperature loads. Therefore, the trolley needs to be redesigned. Summary of the Invention

[0004] The main purpose of the present invention is to provide a belt roasting machine trolley body and a belt roasting machine with bionic ribs, aiming to reduce the temperature difference between the upper and lower surfaces of the trolley body to reduce the phenomenon of the trolley body sagging.

[0005] To achieve the above-mentioned purpose, the present invention provides a belt roasting machine trolley body with bionic ribs, comprising two oppositely arranged wall plates, a plurality of cross beams connecting the two wall plates, and ribs connecting adjacent cross beams, wherein: The crossbeam includes an end crossbeam located at the end surface and a middle crossbeam located in the middle. The cross section of the middle crossbeam includes a first trapezoid, a first polygon, a rectangle, a second polygon and a second trapezoid arranged in sequence. The first polygon and the second polygon both include a top edge, a bottom edge and two side edges connecting the top edge and the bottom edge. The top edge and the bottom edge are both straight lines, and the two side edges are double-hinged curves with continuous curvature connecting the rectangle and the bottom surface of the first trapezoid or the second trapezoid. All cross sections of the rib plate in the axial direction are ellipses, and the centers of all ellipses in the axial direction are collinear with the axis of the rib plate.

[0006] Preferably, the formula of the lemniscate in the polar coordinate system is r 2 =r0 2 sin(2θ). The curve outlines of the sides of the first and second polygons are the section of the lemniscate from point 0 to point p. Point p is the point farthest from the Y axis of the lemniscate. The r0 value is adjusted according to the heights of the first and second polygons to ensure that the vertical heights of the first and second polygons are equal to x. p , x p is the X coordinate value of point P. After rotating the curve 90 degrees along point 0, translate it to the top endpoint of the rectangle to obtain the side.

[0007] Preferably, the cross-section of the end beam is half of the cross-section of the middle beam in the vertical direction; the belt roasting machine trolley body is a vertically symmetrical structure; in the cross-section of the middle beam, the ratio of the height of the first trapezoid to the length of the rectangle is 0.6~0.62, the ratio of the height of the first trapezoid to the height of the first polygon is 0.9~1, and the length of the rectangle is 0.4~0.45 of the total height of the middle beam.

[0008] Preferably, the ribs located between the same two beams are ribs of the same row, the distance between the mid-sections of two adjacent ribs of the same row is L2, and the distance between the mid-sections of a rib and the nearest rib of a different row is L3, and L2 and L3 satisfy: (L2-L3) / L3=0.618.

[0009] Preferably, when the length of the wall panel is L1, the number n of ribs and the length L1 of the wall panel satisfy the following relationship: (1+1.618n)L3=L1; L3 0.1L1.

[0010] Preferably, when the span-wise guide line of the rib is a sine-cosine curve, the span-wise guide line of the rib includes at least two periods of a sine waveform or a cosine waveform.

[0011] Preferably, when the spanwise guide line of the rib is a sine-cosine curve, its cross section at the crest or trough is an ellipse, all ellipses at the crest cross section have the same major and minor axis radii, and all ellipses at the trough cross section have the same major and minor axis radii.

[0012] Preferably, when the span-wise guide line of the rib is a sine-cosine curve, the span-wise guide line formula of the rib is: , Where H is the height of the rib, N is the number of sine and cosine curve cycles, is the span length of the rib, is the ordinate of the spanwise guide line of the rib, is the horizontal coordinate of the spanwise guide line of the rib.

[0013] Preferably, when the span-wise guide line of the rib is a hyperbola, the cross-sections at its two ends are the first ellipse and the second ellipse respectively, the middle cross-section of the rib is the third ellipse, the first curve connects the vertices of the major axes of the first ellipse, the third ellipse and the second ellipse, the second curve connects the end points of the major axes of the first ellipse, the third ellipse and the second ellipse, the third curve connects the bottom points of the major axes of the first ellipse, the third ellipse and the second ellipse, the first curve, the second curve and the third curve are all hyperbolas, the centers of the first ellipse, the second ellipse and the third ellipse are collinear, and the major and minor axis radii of the first ellipse and the second ellipse are consistent.

[0014] The present invention further proposes a belt roasting machine, comprising the above-mentioned belt roasting machine trolley body with bionic ribs, side panels fixed on both sides of the belt roasting machine trolley body and grate bars installed on the belt roasting machine trolley body, and rollers are installed on the side surfaces of the side panels.

[0015] The belt roasting machine trolley body with bionic ribs proposed in the present invention has the following beneficial effects: 1. By changing the structure of ribs and beams, the maximum equivalent stress is reduced while ensuring the reduction of longitudinal deformation, thereby improving structural safety and achieving weight reduction; 2. The trolley body of this belt roasting machine has only minor changes to the original trolley structure, which has the advantages of low transformation cost and easy implementation; 3. The entire trolley body structure is symmetrical up and down, which ensures that the trolley body can be turned over and reused after a certain longitudinal collapse and deformation after long-term operation; 4. The entire trolley body can ensure that the temperature difference between the upper and lower surfaces of the trolley body remains basically unchanged, thereby reducing the longitudinal deformation of the trolley body and making the trolley body lightweight, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of embodiment 1 of a belt roasting machine trolley body with bionic ribs according to the present invention; Figure 2 for Figure 1 The cross-sectional structural diagram in the AA direction is shown; Figure 3a Schematic diagram of the cross-sectional structure of the middle cross beam in Example 1 of the belt roasting machine trolley body with bionic ribs of the present invention; Figure 3b Schematic diagram of the cross-sectional structure of the end beam of embodiment 1 of the belt roasting machine trolley body with bionic ribs of the present invention; Figure 4 This is a schematic diagram of a lemniscate in Example 1 of a belt roasting machine trolley body with bionic ribs of the present invention; Figure 5 Schematic diagram of the longitudinal section of embodiment 1 of the belt roasting machine trolley body with bionic ribs of the present invention; Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure in the BB direction; Figure 7 Schematic diagram of the ribs of embodiment 1 of the belt roasting machine trolley body with bionic ribs of the present invention; Figure 8 Schematic diagram of the ribs of embodiment 2 of the belt roasting machine trolley body with bionic ribs of the present invention; Figure 9aA schematic cross-sectional view of a comparative example 1 of a belt roasting machine trolley body with bionic ribs according to the present invention; Figure 9b Another cross-sectional schematic diagram of comparative example 1 of the belt roasting machine trolley body with bionic ribs of the present invention; Figure 10 Schematic diagram of the longitudinal deformation in the -Y direction of Comparative Example 1; Figure 11 Schematic diagram of temperature distribution of Comparative Example 1; Figure 12 Schematic diagram of the longitudinal deformation in the -Y direction of the first embodiment of the belt roasting machine trolley with bionic ribs of the present invention; Figure 13 Schematic diagram of temperature distribution of the first embodiment of the belt roasting machine trolley with bionic ribs of the present invention.

[0017] In the figure, 1-beam No. 1, 2-beam No. 2, 3-beam No. 3, 4-beam No. 4, 5-beam No. 5, 6-first wall plate, 7-second wall plate, 8-fourth ellipse, 9-fifth ellipse, 10-sixth ellipse, 11-seventh ellipse, 12-eighth ellipse, 13-ninth ellipse, 14-tenth ellipse, 15-fourth curve, 16-fifth curve, 17-sixth curve, 18-first ellipse, 19-third ellipse, 20-second ellipse, 21-first curve, 22-second curve, 23-third curve, 24-first trapezoid, 25-first polygon, 26-rectangle, 27-second polygon, 28-second trapezoid, 29-rib plate.

[0018] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] It should be noted that in the description of the present invention, the terms "transverse," "longitudinal," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] The present invention provides a belt roasting machine trolley body with bionic ribs.

[0022] Reference Figures 1 to 6 The present invention provides a first embodiment of a belt roasting machine trolley body with bionic ribs. In this embodiment, the belt roasting machine trolley body includes two oppositely arranged wall panels (respectively, a first wall panel 6 and a second wall panel 7), a plurality of cross beams connecting the two wall panels, and ribs 29 connecting adjacent cross beams, wherein: The crossbeams include end crossbeams located at the end faces (including crossbeam No. 1 1 and crossbeam No. 5 5) and middle crossbeams located in the middle (including crossbeams No. 2 to No. 4). The cross section of the middle crossbeam includes a first trapezoid 24, a first polygon 25, a rectangle 26, a second polygon 27 and a second trapezoid 28 arranged in sequence. The first polygon 25 and the second polygon 27 both include a top edge, a bottom edge and two side edges connecting the top edge and the bottom edge. The top edge and the bottom edge are both straight lines, and the two side edges are double-hinged curves with continuous curvature connecting the rectangle and the bottom surface of the first trapezoid or the second trapezoid. All axial cross sections of the rib 29 are ellipses, and the centers of all ellipses in the axial direction are collinear with its axis.

[0023] The cross section of the beam is symmetrical up and down around the midline of the long side of the rectangle 26, and symmetrical left and right around the midline of the short side of the rectangle 26. Different from the traditional trolley body beam that uses a trapezoidal transition between the first trapezoid 24 and the rectangle 26, the side edges of the first polygon 25 and the second polygon 27 of the present invention use a curved transition, such as Figure 3a As shown in the figure, the curved profile adopts a double-hedged curve with a continuous curvature at the connection between the web and the flange. In this way, the perimeter remains basically unchanged while the cross-sectional area of ​​the beam is reduced, that is, the heat exchange area remains basically unchanged while the structure is lightweight.

[0024] Specifically, the formula of the lemniscate in polar coordinates is r 2 =r0 2 sin(2θ), the curve profile of the side of the first polygon 25 and the second polygon 27 is the section of the lemniscate from point 0 to point p, and point p is the point farthest from the Y axis of the lemniscate. The r0 value is adjusted according to the height of the first polygon 25 and the second polygon 27 to ensure the vertical height of the first polygon 25 and the second polygon 27 (vertical height refers to Figure 3a The vertical height shown is equal to x p , x p is the X coordinate value of point P. After rotating the curve 90 degrees along point 0, translate it to the top endpoint of the rectangle to obtain the side.

[0025] Reference Figure 3a and Figure 3b , the cross section of the end beam is half of the cross section of the middle beam in vertical direction. Figure 3a and Figure 3b The trolley body of the belt roasting machine has a symmetrical structure up and down. When the trolley body has a certain longitudinal collapse deformation after long-term operation, it can be turned over and reused.

[0026] This embodiment uses five crossbeams as an example for specific description, with two being end crossbeams and three being middle crossbeams. Specifically, in the cross section of the middle crossbeam, the ratio of the height of the first trapezoid 24 to the length of the rectangle 26 is 0.6-0.62, the ratio of the height of the first trapezoid 24 to the height of the first polygon 25 is 0.9-1, and the length of the rectangle 26 is 0.4-0.45 of the total height of the middle crossbeam.

[0027] Further, refer to Figure 5 The ribs 29 located between the same two beams are ribs of the same row. The distance between the mid-sections of two adjacent ribs 29 of the same row is L2. The distance between the mid-sections of a rib 29 and the nearest rib 29 of a different row is L3. L3 and L2 satisfy: (L2-L3) / L3=0.618. In other words, the spacing between the ribs follows the golden ratio of A0 / A1=0.618. The structures of multiple groups of ribs 29 are completely consistent, and the mid-plane spacing of ribs in the same row is consistent.

[0028] When the length of the wall plate is L1, the number n of ribs 29 and the length L1 of the wall plate satisfy the following relationship: (1+1.618n)L3=L1; L3 0.1L1.

[0029] Based on the above conditions, the number n of ribs 29 can be calculated to be 6. The spacing between adjacent ribs 29 of the trolley body, whether starting from the first wall panel 6 or the second wall panel 7, is ensured to always maintain a ratio of 1 / 0.618. This is beneficial to the strength of the trolley body and convective heat transfer, achieving uniform rib surface temperature while ensuring lightweight.

[0030] Specifically, in this embodiment, referring to Figure 7 The ribs 29 are composed of multiple groups of elliptical shapes. Different from the plate-shaped ribs between the beams of the traditional roasting machine, the ribs 29 adopt a wave-shaped leading edge structure that imitates the whale fin in the span direction, which enhances the vortex disturbance of the airflow at this location and thus strengthens the heat exchange. Figure 8 As shown, the span-wise guide line adopts a hyperbola to ensure maximum structural lightweight.

[0031] When the spanwise guide line of rib 29 is a hyperbola, its two end cross-sections are the first ellipse 18 and the second ellipse 20, respectively. The middle cross-section of rib 29 is the third ellipse 19. The first curve 21 connects the major axis vertices of the first ellipse 18, the third ellipse 19, and the second ellipse 20. The second curve 22 connects the end axis endpoints of the first ellipse 18, the third ellipse 19, and the second ellipse 20. The third curve 23 connects the major axis bases of the first ellipse 18, the third ellipse 19, and the second ellipse 20. The first curve 21, the second curve 22, and the third curve 23 are all hyperbolas. The centers of the first ellipse 18, the second ellipse 20, and the third ellipse 19 are collinear, and the major and minor axis radii of the first ellipse 18 and the second ellipse 20 are the same. The specific formula for the hyperbola can be solved based on the coordinates of the major and minor axis endpoints of all ellipses.

[0032] Comparative Example 1 Reference Figure 9a and Figure 9b In this comparative example, under the condition that the length, width, height and number of beams of the trolley body remain unchanged, a trapezoidal transition is adopted between the web and the flange, such as Figure 9a As shown, instead of the double twisted wire in embodiment 1, the cross section of the rib 29 is a trapezoidal structure, which is different from the elliptical cross section of the rib in the present application.

[0033] In Comparative Example 1, the longitudinal deformation and temperature distribution in the -Y direction are as follows: Figure 10 and Figure 12 The longitudinal deformation and temperature distribution in the -Y direction of the embodiment 1 of the present invention are shown as follows: Figure 11 and Figure 13 As shown. The results show that Example 1 of the present invention reduces the longitudinal deformation in the -Y direction. Although the maximum temperature increases, the temperature distribution between the trolley body crossbeam and the rib 29 is more uniform, with smaller differences, facilitating the selection of body materials. A detailed parameter comparison of the two solutions is given in Table 1. It can be seen that Example 1 of the present invention can reduce the maximum equivalent stress while ensuring the reduction of longitudinal deformation, improve structural safety, and achieve a weight reduction of 828 kg, approximately 16%.

[0034] Table 1 Comparison of results of the two schemes

[0035] The belt roasting machine trolley body with bionic ribs proposed in the present invention has the following beneficial effects: 1. By changing the structure of the ribs 29 and the crossbeam, the maximum equivalent stress is reduced while ensuring the reduction of longitudinal deformation, thereby improving the safety of the structure and achieving weight reduction; 2. The trolley body of this belt roasting machine has only minor changes to the original trolley structure, which has the advantages of low transformation cost and easy implementation; 3. The entire trolley body structure is symmetrical up and down, which ensures that the trolley body can be turned over and reused after a certain longitudinal collapse and deformation after long-term operation; 4. The entire trolley body can ensure that the temperature difference between the upper and lower surfaces of the trolley body remains basically unchanged, thereby reducing the longitudinal deformation of the trolley body and making the trolley body lightweight, thereby reducing production costs.

[0036] Example 2 Reference Figure 8 The present embodiment is different from the above-mentioned embodiment 1 in that the spanwise guide line of the rib 29 is a sine-cosine curve. The spanwise guide line of the rib 29 includes at least two periods of sine waveform or cosine waveform.

[0037] When the spanwise guide line of the rib 29 is a sine-cosine curve, its cross section at the crest or trough is an ellipse, and all the ellipses at the crest cross section (including the fourth ellipse 8, the sixth ellipse 10, the eighth ellipse 12 and the tenth ellipse 14) have the same major and minor axis radii, and all the ellipses at the trough cross section (including the fifth ellipse 9, the seventh ellipse 11 and the ninth ellipse 13) have the same major and minor axis radii.

[0038] When the spanwise guide line of the rib 29 is a sine-cosine curve, the formula of the spanwise guide line of the rib 29 (including the fourth curve 15, the fifth curve 16 and the seventh curve 17) is: , Wherein, H is the height of the rib 29, N is the number of sine and cosine curve cycles, is the span length of the rib 29, is the ordinate of the spanwise guide line of the rib 29, is the abscissa of the spanwise guide line of the rib 29 .

[0039] The use of the rib 29 of this curve enhances the vortex disturbance of the airflow at this location, thereby enhancing heat exchange, thereby ensuring that the temperature difference between the upper and lower surfaces of the trolley body remains basically unchanged, thereby reducing the longitudinal deformation of the trolley body and the lightweight of the trolley body, thereby reducing production costs.

[0040] The invention also provides a belt roasting machine.

[0041] In this preferred embodiment, a belt roasting machine includes a belt roasting machine trolley body with bionic ribs, side panels fixed to both sides of the belt roasting machine trolley body, and grate bars mounted on the belt roasting machine trolley body. Rollers are mounted on the side surfaces of the side panels. The specific structure and beneficial effects of the belt roasting machine trolley body are similar to those of the above embodiment and will not be repeated here.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A belt roasting machine trolley with bionic ribs, characterized in that: It includes two wall panels arranged opposite to each other, a plurality of cross beams connecting the two wall panels, and ribs connecting two adjacent cross beams, wherein: The crossbeam includes an end crossbeam located at the end surface and a middle crossbeam located in the middle. The cross section of the middle crossbeam includes a first trapezoid, a first polygon, a rectangle, a second polygon and a second trapezoid arranged in sequence. The first polygon and the second polygon both include a top edge, a bottom edge and two side edges connecting the top edge and the bottom edge. The top edge and the bottom edge are both straight lines, and the two side edges are double-hinged curves with continuous curvature connecting the rectangle and the bottom surface of the first trapezoid or the second trapezoid. All cross sections of the rib plate in the axial direction are ellipses, and the centers of all ellipses in the axial direction are collinear with the axis of the rib plate.

2. The belt roasting machine trolley with bionic ribs according to claim 1, characterized in that: The formula of the lemniscate in polar coordinates is r 2 =r0 2 sin(2θ). The curve outlines of the sides of the first and second polygons are the section of the lemniscate from point 0 to point p. Point p is the point farthest from the Y axis of the lemniscate. The r0 value is adjusted according to the heights of the first and second polygons to ensure that the vertical heights of the first and second polygons are equal to x. p , x p is the X coordinate value of point P. After rotating the curve 90 degrees along point 0, translate it to the top endpoint of the rectangle to obtain the side.

3. The belt roasting machine trolley with bionic ribs according to claim 1, characterized in that: The cross-section of the end crossbeam is half of the cross-section of the middle crossbeam in the vertical direction; the belt roasting machine trolley body is a vertically symmetrical structure; in the cross-section of the middle crossbeam, the ratio of the height of the first trapezoid to the length of the rectangle is 0.6~0.62, the ratio of the height of the first trapezoid to the height of the first polygon is 0.9~1, and the length of the rectangle is 0.4~0.45 of the total height of the middle crossbeam.

4. The belt roasting machine trolley with bionic ribs according to claim 1, characterized in that: The ribs located between the same two beams are ribs of the same row. The distance between the mid-sections of two adjacent ribs of the same row is L2. The distance between the mid-sections of a rib and its nearest rib in a different row is L3. L2 and L3 satisfy the following requirements: (L2-L3) / L3=0.

618.

5. The belt roasting machine trolley with bionic ribs according to claim 4, characterized in that: When the length of the wall panel is L1, the number of ribs n and the length L1 of the wall panel satisfy the following relationship: (1+1.618n)L3=L1; <h2 style=";text-align:left;direction:ltr">L3<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> 0.1L1.

6. The belt roasting machine trolley with bionic ribs according to claim 1, characterized in that: The connecting lines of the major axis endpoints and the minor axis endpoints of the ellipses of all axial cross sections of the rib plate are their spanwise extension lines, and the spanwise extension lines are hyperbolas or sine and cosine curves.

7. The belt roasting machine trolley with bionic ribs according to claim 6, characterized in that: When the spanwise guide line of the rib is a sine-cosine curve, the spanwise guide line of the rib includes at least two cycles of a sine waveform or a cosine waveform; all ellipses at the crest cross sections have the same major and minor axis radii, and all ellipses at the trough cross sections have the same major and minor axis radii.

8. The belt roasting machine trolley with bionic ribs according to claim 7, characterized in that: When the spanwise guide line of the rib is a sine-cosine curve, the spanwise guide line formula of the rib is: ， Where H is the height of the rib, N is the number of sine and cosine curve cycles, is the span length of the rib, is the ordinate of the spanwise guide line of the rib, is the horizontal coordinate of the spanwise guide line of the rib.

9. The belt roasting machine trolley with bionic ribs according to claim 6, characterized in that: When the span-wise guide line of the rib is a hyperbola, the cross sections at its two ends are the first ellipse and the second ellipse respectively, the middle cross section of the rib is the third ellipse, the first curve connects the vertices of the major axes of the first ellipse, the third ellipse and the second ellipse, the second curve connects the end points of the major axes of the first ellipse, the third ellipse and the second ellipse, the third curve connects the base points of the major axes of the first ellipse, the third ellipse and the second ellipse, the first curve, the second curve and the third curve are all hyperbolas, the centers of the first ellipse, the second ellipse and the third ellipse are collinear, and the major and minor axis radii of the first ellipse and the second ellipse are consistent.

10. A belt roasting machine, characterized in that: It comprises a belt roasting machine trolley body with bionic ribs as described in any one of claims 1 to 9, and also comprises side panels fixed on both sides of the belt roasting machine trolley body and grate bars installed on the belt roasting machine trolley body, and rollers are installed on the side surfaces of the side panels.

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