Tunnel roasting system

Abstract

The utility model discloses a tunnel roasting system, and belongs to the technical field of casting mold production. Comprising a tunnel roasting furnace, a material conveying track, a tackle track, a roasting track, a material plate trailer and a flat plate tackle. A material conveying rail parallel to the tunnel roasting furnace is arranged outside the tunnel roasting furnace and beside the tunnel roasting furnace; the material plate trailers are movably arranged on the material conveying track one by one; a roasting track is arranged in the tunnel roasting furnace and located under the tunnel roasting furnace. The roasting track is parallel to the material conveying track; a tackle track is arranged on one side of an inlet of the tunnel roasting furnace and is perpendicular to the material conveying track and the roasting track, and a flat tackle is movably arranged on the tackle track; and the flat plate pulley reciprocates from the material conveying rail end to the roasting rail end on the pulley rail and is used for transferring material plates of a to-be-roasted mold from the material conveying rail to the roasting rail at the inlet of the tunnel roasting furnace one by one.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting mold production, and particularly relates to a tunnel roasting system. Background Art

[0002] A casting mold is a mold made of other easily formed materials in advance to obtain the structural shape of a part. The mold is then placed in a sand mold, forming a cavity with the same structural dimensions as the part. A fluid liquid is poured into the cavity, and after cooling, the liquid forms a part with the same structural shape as the mold. The mold can be produced by firing high-temperature resistant materials. The high-temperature resistant material is coated on a shell that has the same structural shape as the inner cavity of the mold, and then sent to a tunnel roasting furnace for high-temperature roasting to shape the high-temperature resistant material and form a mold.

[0003] The molds to be fired are stacked on a material cart, which carries the molds to be fired into the tunnel roasting furnace for firing. Usually, a track is set under the tunnel roasting furnace, and the material cart is pushed on the track to facilitate pushing it into the tunnel roasting furnace. However, the current track runs through the tunnel roasting furnace from right in front of the tunnel roasting furnace entrance. The material carts to be entered into the furnace body are all stacked on the track outside the furnace body entrance and are pushed into the furnace body one by one. This will form a long waiting area for material carts in front of the furnace body, which takes up more space. In addition, since the material carts are arranged one by one in front of the furnace body entrance, it is not convenient to push the material cart from one side of the cart directly towards the furnace body. The material cart needs to be pushed into the tunnel roasting furnace manually from the side, which is inconvenient to apply force when pushing. Utility Model Content

[0004] The utility model provides a tunnel roasting system, in which a track for material carts to wait in line is set on the side of the tunnel roasting furnace and is arranged side by side and parallel to the track below in the tunnel; the two tracks are located on one side of the tunnel roasting furnace entrance and are connected by a horizontal transfer track; the mold material carts to be roasted are queued on the side of the tunnel roasting furnace, and are transferred one by one from the horizontal transfer track to the tunnel roasting furnace entrance, and then pushed into the tunnel roasting furnace; this avoids occupying too much space in front of the tunnel roasting furnace entrance, and it is easier to apply force to push the mold material carts to be roasted into the tunnel roasting furnace from the direction facing the furnace entrance. The utility model solves the problem that the current tunnel roasting furnace supporting track occupies a long space outside the tunnel roasting furnace and is difficult to apply force to the roasted mold material carts to push them into the tunnel roasting furnace.

[0005] In order to achieve the above technical objectives, the present invention is implemented through the following technical solutions:

[0006] A tunnel roasting system, comprising: a tunnel roasting furnace, a material transport track, a pulley track, a roasting track, a material pallet and a flat pulley;

[0007] A material transport track is provided outside the tunnel roasting furnace and is located beside the tunnel roasting furnace and parallel to the tunnel roasting furnace;

[0008] The material carts are movably arranged one by one on the material transport track;

[0009] A roasting track is provided in the tunnel roasting furnace and directly below the tunnel roasting furnace; the roasting track is parallel to the material transport track;

[0010] On one side of the entrance of the tunnel roasting furnace, a pulley track is provided perpendicular to the material transport track and the roasting track, and a flat pulley is movably provided on the pulley track;

[0011] The flatbed pulley moves back and forth on the pulley track from the material transport track end to the baking track end, and is used to transfer the material carts of the molds to be baked one by one from the material transport track to the baking track at the entrance of the tunnel baking furnace.

[0012] Preferably, two material transport tracks and two roasting tracks are arranged side by side, and the track gauges are kept consistent;

[0013] The material transport track and the roasting track are both centrally arranged in the material transport track groove and the roasting track groove respectively; the material transport track groove and the roasting track groove have the same width;

[0014] There is a distance between the two sides of the material transport track and the roasting track and the two sides of the track groove;

[0015] The upper surfaces of the material transport track and the roasting track are flush with the upper opening of the track groove;

[0016] The width of the material transport track is consistent with that of the roasting track.

[0017] Preferably, two wheel axle rods are provided on the lower bottom surface of the material cart;

[0018] A cart pulley is rotatably provided at both ends of each wheel axle rod;

[0019] The outer peripheral side wall of the cart pulley forms an annular concave structure in the center;

[0020] The protruding parts on both sides of the concave structure of the cart pulley are just stuck in the gaps formed by both sides of the material transport track and both sides of the material transport track groove; the bottom surface of the concave structure contacts the upper surface of the material transport track.

[0021] Preferably, two wheel axle rods are provided on the bottom surface of the flat pulley, perpendicular to the direction of the pulley track;

[0022] A pulley is rotatably provided at both ends of each wheel axle rod;

[0023] A pulley track is provided below each of the pulley wheels on both sides of the flat pulley;

[0024] An arc-shaped concave structure is formed on the contact surface between the pulley wheel and the pulley track, and the arc-shaped concave structure is just adapted to contact the upper surface of the pulley track.

[0025] Preferably, two transfer docking rails are centrally provided on the upper surface of the flatbed pulley;

[0026] The width of the transfer and docking track is equal to the width of the material transport track and the roasting track;

[0027] The track gauge between the two transfer docking tracks is equal to the track gauge between the two material transport tracks and the two roasting tracks;

[0028] The upper surface of the transfer and docking track is flush with the upper surfaces of the material transport track and the roasting track.

[0029] Preferably, a plurality of check blocks are movably provided on both sides of the roasting track groove;

[0030] The installation structure of the anti-return block is configured as follows: anti-return block movable doors are provided on both sides of the roasting track groove;

[0031] The inside of the roasting track groove side corresponding to the movable door of the non-return block is set as a hollow structure;

[0032] The anti-return block is configured as an arc-shaped plate structure; one side of the anti-return block is configured on one side of the anti-return block movable door via a hinged shaft;

[0033] An elastic member is provided between the back surface of the check block and the plate surface on the opposite side of the movable door of the check block;

[0034] When the elastic member is not compressed, the arc surface of the check block exposes the check block movable door; when the elastic member is compressed, the check block enters the hollow structure from the check block movable door.

[0035] Preferably, a plurality of partition bars are vertically arranged at equal intervals on the upper surface of the material cart.

[0036] Preferably, a feed hydraulic push rod is provided facing the entrance of the tunnel roasting furnace;

[0037] After the feed hydraulic push rod is extended, the end portion just contacts the side of the material trolley on the flat pulley; the material trolley can be pushed onto the roasting track in the tunnel roasting furnace.

[0038] Preferably, a pulley hydraulic push rod is provided perpendicular to the roasting track and located beside the roasting track, facing the position of the flat pulley;

[0039] The telescopic end of the pulley hydraulic push rod is connected to the side of the flat pulley;

[0040] The pulley hydraulic push rod is used to drive the flat pulley to move back and forth between the end side of the material transport track and the end side of the roasting track.

[0041] The beneficial effects of the utility model are:

[0042] The utility model provides a tunnel roasting system, wherein a material transport track is arranged on the side of the outside of the tunnel roasting furnace, and a roasting track is arranged just below the tunnel roasting furnace; a pulley track is arranged at one end of the material transport track and the roasting track where a material transport track, a roasting track and a pulley track are located; the material transport track, the roasting track and the pulley track are integrally formed into an "N"-shaped structure; a flat pulley is movably arranged on the pulley track, which is used to transfer the material carts of the molds to be roasted on the material transport track one by one from the material transport track to the front side of the furnace entrance, and finally to the roasting track, so that they are located in the furnace body for roasting; the material carts are transferred one by one to the front of the furnace entrance, so that it is convenient to apply force to push the material carts from the direction facing the furnace body, and push them from the flat pulley into the furnace body; in addition, the material transport track for queuing the material carts of the molds to be roasted is located on the side of the furnace body, so as to avoid occupying the space just in front of the furnace body.

[0043] A feed hydraulic push rod is provided to assist in pushing the material trolley from the flat pulley into the furnace body; at the same time, a pulley hydraulic push rod is provided to assist the reciprocating movement of the flat pulley on the pulley track; no manpower is required for pushing.

[0044] Check blocks are set on both sides of the roasting track groove where the roasting track is located; when the material cart moves from the entrance side to the exit side of the furnace body, the cart pulley of the material cart normally squeezes the arc surface of the check block and presses it into the roasting track groove, so that the check block does not affect the movement of the material cart to the exit side in the furnace body; but if the material cart in the furnace body moves backward, the front end of the check block will block the cart pulley of the material cart to prevent the material cart from reversing. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0047] Figure 2 This is a schematic diagram of the arrangement structure of the material transport track, baking track and pulley track of the utility model;

[0048] Figure 3 This is a schematic structural diagram of a flat pulley of the present utility model;

[0049] Figure 4 This is a structural diagram of a material pallet truck of the present utility model;

[0050] Figure 5 This is a schematic diagram of the matching structure between the cart pulley and the material transport track of the utility model;

[0051] Figure 6 It is a schematic diagram of the matching structure between the pulley wheel and the pulley track of the utility model;

[0052] Figure 7 This is a schematic diagram of the installation structure of the baking track groove and the check block of the utility model;

[0053] Figure 8 It is a perspective view of the installation structure of the check block of the present utility model.

[0054] In the accompanying drawings, the structural names represented by the reference numerals are:

[0055] Tunnel roasting furnace, 2- material transport track, 3- pulley track, 4- flat pulley, 401- pulley pulley, 5- transfer docking track, 6- feed hydraulic push rod, 7- roasting track, 701- roasting track groove, 7011- check block movable door, 7012- hinged shaft, 7013- elastic part, 702- check block, 8- pulley hydraulic push rod, 9- material cart, 901- partition fence, 902- cart pulley. DETAILED DESCRIPTION

[0056] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0057] Example 1: A tunnel roasting system, comprising: a tunnel roasting furnace 1, a material transport track 2, a pulley track 3, a roasting track 7, a material trolley 9 and a flat pulley 4;

[0058] The tunnel roasting furnace 1 in this embodiment belongs to an existing product, and its specific structure is not described in detail; after the mold to be fired enters the tunnel roasting furnace 1, it is subjected to high-temperature firing and molding in the furnace body, such as Figure 1, the left side is set as the entrance side of the tunnel roasting furnace 1, and the right side is set as the exit side of the tunnel roasting furnace 1. In addition, the entire tunnel roasting furnace 1 is placed on the flat ground, and the tracks involved are also set on the ground.

[0059] like Figure 1 As shown, it is located outside the tunnel roasting furnace 1, and a material transport track 2 is set parallel to the tunnel roasting furnace 1 next to the tunnel roasting furnace 1; two material transport tracks 2 are set side by side in parallel, and the specific setting structure is: two material transport track grooves are recessed downwardly in the ground, and a material transport track 2 is set in the center of each material transport track groove, with a gap between the two sides of the material transport track 2 and the two sides of the material transport track groove, and the upper surface of the material transport track 2 is flush with the upper opening of the material transport track groove;

[0060] The function of the material transport track 2 is to queue and move the material cart 9 for the mold to be baked; Figure 4 As shown, two wheel axles are provided on the bottom surface of the material cart 9; a cart pulley 902 is provided at both ends of each wheel axle through a bearing for rotation; the outer peripheral side wall of the cart pulley 902 forms a circular concave structure in the center; Figure 5 As shown, the protruding parts on both sides of the concave structure of the cart pulley 902 are just stuck in the gap formed by the two sides of the material transport track 2 and the two sides of the material transport track groove; the bottom surface of the concave structure contacts the upper surface of the material transport track 2; in this way, when the material cart 9 moves on the material transport track 2, it will not derail and the operation will be stable.

[0061] A roasting track 7 is provided parallel to the material transport track 2 and directly below the tunnel roasting furnace 1. Two similar roasting tracks 7 are provided side by side in parallel, and the gauge of the two roasting tracks 7 is equal to the gauge of the two material transport tracks 2. The width of the roasting track 7 is also consistent with the width of the material transport track 2. Like the material transport track 2, two roasting track grooves are recessed downwards on the ground, and a roasting track 7 is centrally provided in each roasting track groove. There is a gap between the two sides of the roasting track 7 and the two sides of the roasting track groove, and the upper surface of the roasting track 7 is flush with the upper opening of the roasting track groove. When the material cart 9 is transferred from the material transport track 2 to the roasting track 7, the protruding parts on both sides of the recessed structure of the cart pulley 902 also fit exactly in the gap formed between the two sides of the roasting track 7 and the two sides of the roasting track groove; the bottom surface of the recessed structure contacts the upper surface of the roasting track 7.

[0062] like Figure 2 As shown, on one side of the entrance of the tunnel roasting furnace 1, a rectangular inner pit is dug downward in the ground; on the bottom surface of the inner pit, close to the pit walls on both sides, two parallel pulley tracks 3 are set perpendicular to the material transport track 2 and the roasting track 7; a flat pulley 4 is movably set on the pulley tracks 3;

[0063] like Figure 3As shown, two wheel axle rods are provided on the bottom surface of the flat pulley 4, perpendicular to the direction of the pulley track 3; a pulley pulley 401 is provided at both ends of each wheel axle rod for rotation through a bearing;

[0064] The two pulley wheels 401 on each side of the flat pulley 4 are each facing a pulley track 3; Figure 6 As shown, an arc-shaped concave structure is formed on the contact surface between the pulley 401 and the pulley track 3, and the arc-shaped concave structure fits perfectly in contact with the upper surface of the pulley track 3, so that the pulley 401 will not derail and can move and slide smoothly.

[0065] The mold to be baked is placed on the material cart 9, and the material carts 9 move one by one from the material transport track 2 to the flatbed pulley 4. Finally, the material cart 9 transfers to the flatbed pulley 4, and then the flatbed pulley 4 carries the material cart 9 on the pulley track 401 to the entrance side of the baking furnace, and carries the material cart 9 to the entrance facing the baking furnace, so that the material cart 9 can be pushed into the baking furnace conveniently.

[0066] So how to make the material trolley 9 smoothly transition from the material transport track 2 to the flat pulley 4, and smoothly transition from the flat pulley 4 to the roasting track 7 to reach the tunnel roasting furnace 1; Figure 3 As shown, two transfer docking rails 5 are arranged in parallel and centered on the upper surface of the flatbed pulley 4; the width of the transfer docking rails 5 is equal to the width of the material transport rail 2 and the roasting rail 7; the gauge between the two transfer docking rails 5 is equal to the gauge of the material transport rail 2 and the roasting rail 7; the upper surface of the transfer docking rail 5 is flush with the upper surfaces of the material transport rail 2 and the roasting rail 7. Regardless of whether the flatbed pulley 4 moves to the side of the material transport rail 2 or the roasting rail 7, the ends of the transfer docking rails 5 on the flatbed pulley 4 are aligned with the ends of the material transport rail 2 and the roasting rail 7, and the distance between the ends is small; this ensures that the material cart 9 can be transferred smoothly on the material transport rail 2, the transfer docking rail 5 and the roasting rail 7.

[0067] Several material carts 9 are lined up and parked on the transport track 2, with the flatbed pulley 4 located on one side of the transport track 2 and the transfer docking track 5 aligned with the transport track 2. The material carts 9 are pushed onto the transfer docking track 5 of the flatbed pulley 4. The flatbed pulley 4 is then pushed toward the roasting furnace entrance until the transfer docking track 5 is aligned with the roasting track 7. The material carts 9 are then pushed from the flatbed pulley 4 onto the roasting track 7, that is, into the roasting furnace for roasting. When a material cart 9 is pushed into the roasting furnace entrance, a material cart 9 carrying a fired mold is pushed out from the roasting furnace exit. In this way, the material carts 9 are transferred one by one into the tunnel roasting furnace 1.

[0068] As a preferred embodiment, in order to prevent the molds to be fired from being squeezed against each other and causing scratches on the mold materials; Figure 4As shown, a plurality of partition fences 901 are vertically arranged at equal intervals on the upper surface of the material cart 9; a mold to be baked is placed between two adjacent partition fences 901. In this way, the molds will not affect each other and can be placed independently.

[0069] Example 2: Based on Example 1, in Example 1, the pushing of the flatbed pulley 4 and the pushing of the material cart 9 from the flatbed pulley 4 into the roasting furnace require manual operation; on the one hand, the temperature outside the roasting road is high, and the pushing is relatively laborious; on the other hand, when pushing the flatbed pulley 4, it is necessary to always pay attention to the moving position, and it is necessary to ensure that the transfer docking track 5 on the flatbed pulley 4 is aligned with the material transport track 2 and the roasting track 7; and the weight is heavy during pushing, and it is more difficult to control.

[0070] like Figure 2 As shown, in this embodiment, a feed hydraulic push rod 6 is provided facing the entrance of the tunnel roasting furnace 1; the feed hydraulic push rod 6 is provided on the ground; when the flatbed pulley 4 moves to the side facing the entrance of the roasting furnace, the height of the feed hydraulic push rod 6 is set so that after it is extended, the end portion can just abut the side of the material trolley 9 on the flatbed pulley 4; the material trolley 9 can be pushed onto the roasting track 7 in the tunnel roasting furnace 1, that is, pushed into the roasting furnace from the entrance side;

[0071] A pulley hydraulic push rod placement pit is opened on the side of the rectangular inner pit where the flat pulley 4 moves, close to the roasting furnace; in the hydraulic push rod placement pit, a pulley hydraulic push rod 8 is set perpendicular to the roasting track 7, and located next to the roasting track 7, facing the position of the flat pulley 4; the setting height of the pulley hydraulic push rod 8 allows its telescopic end to be connected parallel to the side of the flat pulley 4; the pulley hydraulic push rod 8 is used to drive the flat pulley 4 to move back and forth between the end side of the material transport track 2 and the end side of the roasting track 7.

[0072] The above-mentioned feed hydraulic push rod 6 and pulley hydraulic push rod 8 are existing products, and their structure and hydraulic rod telescopic control components belong to the existing technology; they will not be described in detail here; the hydraulic rod telescopic control components of the feed hydraulic push rod 6 and the pulley hydraulic push rod 8 control their extension and recovery lengths to be consistent each time; this can ensure that the material cart 9 is smoothly pushed into the roasting furnace; and when the flatbed pulley 4 moves back and forth, the transfer docking track 5 on the flatbed pulley 4 can be aligned with the material transport track 2 and the roasting track 7.

[0073] Example 3: Based on Example 1, in Example 1, the material cart 9 enters the roasting furnace from the entrance side, completes the mold firing at high temperature in the roasting furnace, and the fired mold leaves the roasting furnace from the exit side under the material cart 9; therefore, the material cart 9 is single-line moving, and can only enter from the entrance side of the roasting furnace, move to the exit side and leave, and cannot reverse; because once a material cart 9 reverses, all the material carts 9 behind it may reverse toward the entrance side; this may cause production accidents and make the mold scrapped.

[0074] like Figure 7 As shown, a plurality of check blocks 702 are movably provided on both sides of the roasting track groove 701;

[0075] like Figure 8 As shown, the installation structure of the check block 702 is set as follows: a plurality of check block movable doors 7011 are opened on both sides of the roasting track groove 701; one check block movable door 7011 is installed correspondingly to one check block 702;

[0076] The inside of the side of the roasting track groove 701 corresponding to the anti-return block movable door 7011 is configured as a hollow structure; the anti-return block 702 is configured as an arc-shaped plate structure; the pointed side of the anti-return block 702 is configured to a side of the anti-return block movable door 7011 via a hinge shaft 7012; an elastic member 7013 is provided between the back surface of the anti-return block 702 and the plate surface on the opposite side of the anti-return block movable door 7011. The elastic member 7013 can be configured as a spring or other structural component with elastic action;

[0077] When the elastic member 7013 is not compressed, the curved surface of the check block 702 exposes the check block movable door 7011; the side opposite to the pointed side of the check block 702 is a flat structure, and this side of the flat structure also completely exposes the check block movable door 7011 when the elastic member 7013 is not compressed; when the elastic member 7013 is compressed, the check block 702 will enter the hollow structure from the check block movable door 7011. The running direction of the material cart 9 from the inlet side to the outlet side of the roasting furnace is from the pointed side of the check block 702 to the flat side; therefore, when the cart pulley 902 of the material cart 9 runs from the inlet side to the outlet side on the roasting track 7, the cart pulley 902 encounters the check block 702, and both sides of the cart pulley 902 follow the arc surface of the check block 702, while compressing the check block 702 and pressing it back into the hollow structure; in this way, the check block 702 will not hinder the rolling of the cart pulley 902, and the material cart 9 can move normally; once the material cart 9 reverses, the flat side of the check block 702 will block the cart pulley 902, preventing the material cart 9 from reversing.

[0078] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0079] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A tunnel roasting system, characterized in that: include: Tunnel roasting furnace, material transport track, pulley track, roasting track, material trolley and flatbed pulley; A material transport track is provided outside the tunnel roasting furnace and is located beside the tunnel roasting furnace and parallel to the tunnel roasting furnace; The material carts are movably arranged one by one on the material transport track; A roasting track is provided in the tunnel roasting furnace and directly below the tunnel roasting furnace; The roasting track is parallel to the material transport track; On one side of the entrance of the tunnel roasting furnace, a pulley track is provided perpendicular to the material transport track and the roasting track, and a flat pulley is movably provided on the pulley track; The flatbed pulley moves back and forth on the pulley track from the material transport track end to the baking track end, and is used to transfer the material carts of the molds to be baked one by one from the material transport track to the baking track at the entrance of the tunnel baking furnace.

2. A tunnel roasting system according to claim 1, characterized in that: The material transport track and the roasting track are both arranged side by side in two pieces, and the track gauges are kept consistent; The material transport track and the roasting track are both centrally arranged in the material transport track groove and the roasting track groove respectively; the material transport track groove and the roasting track groove have the same width; There is a distance between the two sides of the material transport track and the roasting track and the two sides of the track groove; The upper surfaces of the material transport track and the roasting track are flush with the upper opening of the track groove; The width of the material transport track is consistent with that of the roasting track.

3. The tunnel roasting system according to claim 1, characterized in that: Two wheel axle rods are provided on the lower bottom surface of the material cart; A cart pulley is rotatably provided at both ends of each wheel axle rod; The outer peripheral side wall of the cart pulley forms an annular concave structure in the center; The protruding parts on both sides of the concave structure of the cart pulley are just stuck in the gaps formed by both sides of the material transport track and both sides of the material transport track groove; the bottom surface of the concave structure contacts the upper surface of the material transport track.

4. The tunnel roasting system according to claim 1, characterized in that: Two wheel axle rods are provided on the bottom surface of the flat pulley, perpendicular to the direction of the pulley track; A pulley is rotatably provided at both ends of each wheel axle rod; A pulley track is provided below each of the pulley wheels on both sides of the flat pulley; An arc-shaped concave structure is formed on the contact surface between the pulley wheel and the pulley track, and the arc-shaped concave structure is just adapted to contact the upper surface of the pulley track.

5. The tunnel roasting system according to claim 1, characterized in that: Two transfer docking rails are centrally arranged on the upper surface of the flatbed pulley; The width of the transfer and docking track is equal to the width of the material transport track and the roasting track; The track gauge between the two transfer docking tracks is equal to the track gauge between the two material transport tracks and the two roasting tracks; The upper surface of the transfer and docking track is flush with the upper surfaces of the material transport track and the roasting track.

6. The tunnel roasting system according to claim 2, characterized in that: A plurality of anti-return blocks are movably provided on both sides of the roasting track groove; The installation structure of the anti-return block is configured as follows: anti-return block movable doors are provided on both sides of the roasting track groove; The inside of the roasting track groove side corresponding to the movable door of the non-return block is set as a hollow structure; The anti-return block is configured as an arc-shaped plate structure; one side of the anti-return block is configured on one side of the anti-return block movable door via a hinged shaft; An elastic member is provided between the back surface of the check block and the plate surface on the opposite side of the movable door of the check block; When the elastic member is not compressed, the arc surface of the check block exposes the check block movable door; when the elastic member is compressed, the check block enters the hollow structure from the check block movable door.

7. The tunnel roasting system according to claim 1, characterized in that: A plurality of partition bars are vertically arranged at equal intervals on the upper surface of the material cart.

8. The tunnel roasting system according to claim 1, characterized in that: A feeding hydraulic push rod is arranged opposite to the entrance of the tunnel roasting furnace; After the feed hydraulic push rod is extended, the end portion just contacts the side of the material cart on the flat pulley; the material cart is pushed onto the roasting track in the tunnel roasting furnace.

9. The tunnel roasting system according to claim 1, characterized in that: A pulley hydraulic push rod is provided perpendicular to the roasting track, located beside the roasting track, and facing the position of the flat pulley; The telescopic end of the pulley hydraulic push rod is connected to the side of the flat pulley; The pulley hydraulic push rod is used to drive the flat pulley to move back and forth between the end side of the material transport track and the end side of the roasting track.

Images