Bin door assembly and replacement bin thereof

Abstract

The utility model belongs to the field of replacement bins, and particularly relates to a bin door assembly and a replacement bin thereof, and the bin door assembly comprises a supporting seat, a door plate, a door plate driving mechanism and a transition roller; the supporting seat comprises two door plate matching plates which are oppositely arranged and roller body mounting plates which are arranged on the two sides of the two door plate matching plates, and the two door plate matching plates and the two roller body mounting plates are enclosed to form a door plate accommodating cavity; the transition roller is rotationally arranged on the two roller body mounting plates; openings are formed in the opposite positions of the two door plate matching plates, the lower end faces of the openings are located below the transition roller supporting faces, and the door plate driving mechanism is used for driving the door plate to enter or leave the door plate containing cavity and enabling the door plate to block one opening when driving the door plate to enter the door plate containing cavity. According to the bin gate assembly provided by the utility model, the transition roller is arranged in the door plate accommodating cavity, so that materials can be supported when passing through the bin gate assembly, and the materials are prevented from falling or being blocked in conveying.

Description

Technical Field

[0001] The utility model belongs to the field of replacement bins, and particularly relates to a bin door assembly and a replacement bin thereof. Background Art

[0002] A roller hearth kiln is a continuous kiln using roller rods as transfer tools for firing products. When products need to be fired in a protective atmosphere, replacement bins are usually installed at both ends of the roller hearth kiln to remove impurity gases.

[0003] When the span of the replacement bin door is large, since the material is not supported when passing through the door, there is a risk of falling or blocking the kiln channel. For this reason, a bin door assembly and a replacement bin that can solve the above problems are proposed. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a bin door assembly and a replacement bin that can improve the stability of material transportation.

[0005] The utility model provides a bin door assembly, including a support seat, a door panel, a door panel driving mechanism, and a transition roller;

[0006] The support seat includes two relatively arranged door panel mating plates and roller body mounting plates arranged on both sides of the two door panel mating plates. The two door panel mating plates and the two roller body mounting plates enclose a door panel accommodating cavity;

[0007] Both ends of the transition roller are rotatably arranged on the two roller body mounting plates, and the transition roller is arranged below the door panel accommodating cavity;

[0008] Openings are arranged at opposite positions on the two door panel mating plates, and the lower end surface of the opening is located below the support surface of the transition roller. The door panel driving mechanism is used to drive the door panel into or out of the door panel accommodating cavity, and when driving the door panel into the door panel accommodating cavity, the door panel blocks at least one of the openings.

[0009] Furthermore, the door panel accommodating cavity includes a door panel closed position at the opening and a door panel open position above the opening;

[0010] Both the door panel closed position and the door panel open position can independently accommodate the door panel.

[0011] Furthermore, the door panel mating plates and the roller body mounting plates are connected to each other. The bin door assembly further includes a bottom plate connecting the bottoms of the door panel mating plates and the roller body mounting plates and a top plate connecting the tops of the door panel mating plates and the roller body mounting plates. The door panel mating plates, the roller body mounting plates, the bottom plate, and the top plate enclose the door panel accommodating cavity.

[0012] Furthermore, the door panel driving mechanism includes a linear driving mechanism arranged outside the top plate of the door panel accommodating cavity and at least two driving rods slidably arranged through the top plate;

[0013] One end of the driving rod is connected to the output end of the linear driving mechanism, and the other end extends into the door panel accommodating cavity. At least two connecting rods are hingedly arranged at the position where the driving rod extends into the door panel accommodating cavity, and the door panel is hinged to the other end of the connecting rod;

[0014] A limit block is arranged below the door panel accommodating cavity. After the linear drive mechanism drives the door panel to move downward to abut against the limit block, the door panel moves transversely through the connecting rod to block the opening.

[0015] Furthermore, two groups of connecting rods, door panels and limit blocks are radially arranged, and the two door panels are respectively matched with the two openings.

[0016] Furthermore, the output end of the linear drive mechanism is arranged away from the door panel accommodating cavity, and a connecting plate is arranged on the output end of the linear drive mechanism, and at least two driving rods are fixedly connected to the connecting plate.

[0017] Furthermore, a mounting hole is provided on the roller mounting plate, a rotating seal is provided on the mounting hole, a bearing seat is also provided on the outer side of the roller mounting plate, and both ends of the transition roller pass through the mounting holes respectively and cooperate with the rotating seal and the bearing seat.

[0018] The utility model also provides a replacement bin, comprising a replacement bin body and the above-mentioned bin door assembly arranged on at least one side of the replacement bin body;

[0019] A roller conveying mechanism is arranged in the replacement bin body, and the conveying plane of the roller conveying mechanism is flush with the supporting surface of the transition roller.

[0020] Furthermore, a sealing box is provided on the side wall of the replacement bin body, a connecting rod assembly is provided on the outer side of the sealing box, and the end of the roller rod in the roller conveying mechanism extends into the sealing box;

[0021] One end of the connecting rod assembly is connected with the roller rod in the sealing box, and the other end extends out of the sealing box to connect with the power assembly.

[0022] Furthermore, a graphite sleeve is arranged on the other side wall of the replacement bin body, and the other end of the roller is rotatably arranged in the graphite sleeve.

[0023] The beneficial effect of the present invention is that the bin door assembly provided by the present invention can support the material when passing through the bin door assembly by arranging a transition roller in the door panel accommodating cavity, thereby preventing the material from sinking or tilting and causing transportation obstruction, and the arrangement of the door panel matching plate facilitates the connection of the bin door assembly with two adjacent furnace bodies or bin bodies, simplifies the installation method of the bin door assembly, and after the connection, the two furnace bodies or bin bodies can be interconnected and separated from each other through the door panel in the longitudinal section direction, thereby facilitating the transmission of materials between the two connected furnace bodies or bin bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1It is the side view of the bin door assembly in the present utility model;

[0025] Appendix Figure 2 is Appendix Figure 1 the sectional view taken along the A-A direction in the appendix;

[0026] Appendix Figure 3 is Appendix Figure 2 the partial enlarged view at position B in the appendix;

[0027] Appendix Figure 4 It is the front view of the bin door assembly in the present utility model;

[0028] Appendix Figure 5 is Appendix Figure 4 the sectional view taken along the C-C direction in the appendix;

[0029] Appendix Figure 6 It is the internal top view of the replacement bin body in the present utility model;

[0030] Appendix Figure 7 It is the partial schematic diagram of the sealed bin in the present utility model.

[0031] In the figure, 1 - bin door assembly; 11 - support base; 111 - door panel mating plate; 1111 - opening; 112 - roller mounting plate; 1121 - mounting hole; 113 - bottom plate; 114 - top plate; 115 - door panel accommodating cavity; 12 - door panel; 13 - door panel driving mechanism; 131 - linear driving mechanism; 132 - driving rod; 133 - connecting rod; 134 - limiting block; 135 - connecting plate; 14 - transition roller; 141 - rotating shaft; 142 - ceramic wheel; 15 - rotary seal; 151 - sealing gasket; 152 - fastener; 16 - bearing seat; 2 - replacement bin body; 3 - roller conveyor mechanism; 31 - roller; 4 - seal box; 5 - connecting rod assembly; 51 - transmission rod; 52 - universal joint; 53 - roller rod connecting rod; 54 - connecting sleeve; 6 - power assembly; 61 - driving shaft; 62 - driving helical gear; 63 - driven helical gear; 7 - graphite sleeve; 8 - transmission rod bearing seat. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.

[0034] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0035] In the present utility model, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, a physical connection or a wireless communication connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0037] As shown in the attached Figure 1 - attached Figure 7 drawings, the present utility model provides a door assembly 1, including a support base 11, a door panel 12, a door panel driving mechanism 13, and a transition roller 14;

[0038] The support seat 11 includes two door panel matching plates 111 arranged opposite to each other and roller mounting plates 112 arranged on both sides of the two door panel matching plates 111, wherein the door panel matching plates 111 are used to connect with the warehouse body or furnace body to be matched with the warehouse door assembly 1, for example, when the warehouse door assembly 1 is installed between the replacement warehouse body 2 and the heating furnace (which can also be a cooling furnace), one of the door panel matching plates 111 is connected to the end of the replacement warehouse body 2, and the other door panel matching plate 111 is used to connect with the end of the heating furnace, and the roller mounting plates 112 are arranged on both sides of the two door panel matching plates 111, that is, the two door panel matching plates 111 and the two roller mounting plates 112 are arranged in a rectangular shape, and the two door panel matching plates 111 and the two roller mounting plates 112 enclose a door panel accommodating cavity 115, and the door panel accommodating cavity 115 is used to accommodate the door panel 12;

[0039] The two ends of the transition roller 14 are rotatably arranged on the two roller mounting plates 112, that is, one end of the transition roller 14 is rotatably connected to one of the roller mounting plates 112, and the other end is rotatably connected to the other roller mounting plate 112, and the transition roller 14 is arranged below the door panel accommodating cavity 115;

[0040] Openings 1111 are provided at relative positions on the two door panel matching plates 111, and the openings 1111 are used to communicate with the end openings of the replacement bin body 2 connected to the bin door assembly 1 or with the end openings of the heating furnace, so that the bin door assembly 1 can be connected to the replacement bin body 2 and the heating furnace when it is set to the installation position. The lower end surface of the opening 1111 is located below the supporting surface of the transition roller 14. At this time, when the material passes through the bin door assembly 1 from the replacement bin body 2 or the heating furnace, it will be carried and conveyed by the transition roller 14, thereby avoiding the material from being unloaded when passing through the bin door assembly 1, causing the material to sink or tilt and be unable to enter the next workstation. The door panel driving mechanism 13 is used to drive the door panel 12 to enter or leave the door panel accommodating cavity 115, and when driving the door panel 12 to enter the door panel accommodating cavity 115, the door panel 12 blocks at least one of the openings 1111, thereby allowing the door panel 12 to seal the end of the replacement bin body 2 or the heating furnace.

[0041] The bin door assembly 1 provided by the present utility model can support materials when the materials pass through the bin door assembly 1 by arranging a transition roller 14 in the door panel accommodation cavity 115, avoiding the transportation blockage caused by the falling or warping of the materials. Moreover, the arrangement of the door panel mating plate 111 facilitates the connection of the bin door assembly 1 with two adjacent furnaces or bins, simplifies the installation method of the bin door assembly 1. After connection, the two furnaces or bins can be interconnected and mutually partitioned in the longitudinal section direction through the door panel 12, facilitating the transfer of materials between the two connected furnaces or bins. It is especially suitable for the requirement of firing products in a protective atmosphere in a heating furnace. When the inlet or outlet of the heating furnace is connected to the replacement bin body 2, this bin door assembly 1 is arranged at the connection position.

[0042] In one embodiment, the door panel accommodation cavity 115 includes a door panel closing position at the opening 1111 and a door panel opening position above the opening 1111.

[0043] Both the door panel closing position and the door panel opening position can independently accommodate the door panel 12, that is, the height of the door panel accommodation cavity 115 is higher than twice the height of the door panel 12. In this way, the door panel 12 can completely enter the door panel closing position to block the opening 1111, or the door panel 12 can completely enter the door panel opening position to completely leave the opening 1111.

[0044] In one embodiment, the door panel mating plate 111 and the roller mounting plate 112 are connected to each other. It further includes a bottom plate 113 connecting the bottom of the door panel mating plate 111 and the roller mounting plate 112, and a top plate 114 connecting the tops of the door panel mating plate 111 and the roller mounting plate 112. The door panel mating plate 111, the roller mounting plate 112, the bottom plate 113, and the top plate 114 enclose to form the door panel accommodation cavity 115. In this embodiment, the door panel mating plate 111 and the roller mounting plate 112 are connected, and the bottom plate 113 and the top plate 114 are equipped, so that the door panel accommodation cavity 115 is a closed structure at positions other than the opening 1111. When connecting the opening 1111 to the ends of other connected furnaces or bins, the entire door panel accommodation cavity 115 is a closed structure communicating with other connected furnaces or bins, which can avoid air leakage when the bin door assembly 1 connects two adjacent furnaces or bins, improve the sealing performance, and ensure the airtightness requirements during the material transportation process.

[0045] In one embodiment, the door panel driving mechanism 13 is used to drive the door panel 12 to enter or leave the door panel accommodation cavity 115 from above the door panel accommodation cavity 115, that is, the door panel opening position is directly above the door panel closing position, so that the door panel 12 moves up and down in a plumb state, facilitating the guiding movement of the door panel 12.

[0046] In one embodiment, the door panel driving mechanism 13 includes a linear driving mechanism 131 disposed outside the top plate 114 of the door panel accommodating cavity 115 and at least two driving rods 132 slidably disposed through the top plate 114. By setting the linear driving mechanism 131 outside the door panel accommodating cavity 115, on the one hand, it is convenient for the installation and maintenance of the linear driving mechanism 131, and on the other hand, it can isolate the linear driving mechanism 131 from the harsh environment inside the furnace body or the bin body, which can reduce the burden on the linear driving mechanism 131 and improve its service life. Preferably, two driving rods 132 are provided. Preferably, the driving rods 132 are in sealed sliding fit with the top plate 114. Optionally, the linear driving mechanism 131 can be a cylinder, a hydraulic cylinder or an electric cylinder;

[0047] One end of the driving rod 132 is connected to the output end of the linear driving mechanism 131, and the other end extends into the door panel accommodating cavity 115. At least two connecting rods 133 are hingedly disposed at the portion where the driving rod 132 extends into the door panel accommodating cavity 115. The door panel 12 is hinged to the other ends of the connecting rods 133. Preferably, two connecting rods 133 are provided in the axial direction of the driving rod 132 and are respectively located on the upper and lower sides of the door panel 12. At this time, the two driving rods 132, the four connecting rods 133 and the door panel 12 form two sets of parallelogram mechanisms that are parallel to each other;

[0048] A limiting block 134 is disposed below the door panel accommodating cavity 115. After the linear driving mechanism 131 drives the door panel 12 to move downward and abut against the limiting block 134, the door panel 12 horizontally moves through the connecting rods 133 to block the opening 1111.

[0049] In this embodiment, by providing a linear driving mechanism 131, the lifting and horizontal movement of the door panel 12 can be realized. The horizontal movement can block the opening 1111 to realize the closing of the door assembly 1.

[0050] In one embodiment, there are two sets of the connecting rods 133, the door panels 12 and the limiting blocks 134 arranged radially, and the two door panels 12 are respectively matched with the two openings 1111. In this embodiment, two door panels 12 are provided. The two door panels 12 can interact with each other during the mirror-image horizontal movement process, ensuring that the driving rods 132 are in the middle position. Furthermore, there is no need to be equipped with a limiting mechanism on the driving rods 132, and the opening and closing of the two openings 1111 can be realized synchronously. When separating two adjacent furnace bodies or bins, the sealing performance of the adjacent furnace bodies or bins can be improved.

[0051] In one embodiment, a sealing ring installation groove is provided outside the opening 1111, and a sealing ring is fixedly disposed in the sealing ring installation groove. When the door panel 12 is attached to the opening 1111, the door panel 12 abuts against the sealing ring, further improving the sealing effect of blocking the opening 1111.

[0052] In one embodiment, the output end of the linear drive mechanism 131 is arranged away from the door panel accommodation cavity 115, and a connecting plate 135 is arranged on the output end of the linear drive mechanism 131. At least two drive rods 132 are fixedly connected to the connecting plate 135. In this embodiment, the displacement of the drive rod 132 driven by the linear drive mechanism 131 can be ensured, and further the movement range of the drive door panel 12 can be ensured.

[0053] In one embodiment, mounting holes 1121 are arranged on the roller body mounting plate 112. The aperture of the mounting holes 1121 is larger than the diameter of the transition roller 14. A rotary seal 15 is arranged on the mounting holes 1121. Preferably, the rotary seal 15 includes a sealing gasket 151. A hole closely matching the transition roller 14 is arranged on the sealing gasket 151, and the sealing gasket 151 is fixedly arranged on the roller body mounting plate 112 through a fastener 152. An outer side of the roller body mounting plate 112 is further provided with a bearing seat 16. Preferably, a height adjusting structure is arranged on the bearing seat 16, so that the height and levelness of the transition roller 14 can be adjusted. Two ends of the transition roller 14 respectively pass through the mounting holes 1121 and cooperate with the rotary seal 15 and the bearing seat 16.

[0054] In one embodiment, the transition roller 14 includes a rotating shaft 141 and a plurality of ceramic wheels 142 arranged on the rotating shaft 141. At this time, the upper end of the ceramic wheel 142 is a supporting surface, thereby reducing the ceramic usage amount on the basis of ensuring the conveying reliability.

[0055] The present utility model further provides a replacement bin, including a replacement bin body 2 and a door assembly 1 arranged on at least one side of the replacement bin body 2. Preferably, door assemblies 1 are arranged on both sides of the replacement bin body 2;

[0056] A roller conveyor mechanism 3 is arranged in the replacement bin body 2. The conveying plane of the roller conveyor mechanism 3 is flush with the supporting surface of the transition roller 14, that is, when discharging the replacement bin body 2, materials in the replacement bin body 2 pass through the roller conveyor mechanism 3 and then leave the replacement bin body 2 through the transition of the transition roller 14. When feeding the replacement bin body 2, the materials pass through the transition of the transition roller 14 and enter the replacement bin body 2 through the roller conveyor mechanism 3.

[0057] In one embodiment, a sealing box 4 is arranged on the side wall of the replacement bin body 2, a connecting rod assembly 5 is arranged on the outer side surface of the sealing box 4, and an end of a roller rod 31 in the roller conveyor mechanism 3 extends into the sealing box 4;

[0058] One end of the connecting rod assembly 5 is connected to the roller rod 31 in the sealing box 4, and the other end extends out of the sealing box 4 and is connected to the power assembly 6. In this embodiment, the power assembly 6 is isolated from the harsh environment of high temperature and a lot of dust in the replacement bin body 2, so as to improve the service life.

[0059] In one embodiment, the connecting rod assembly 5 includes a transmission rod 51, a universal joint 52 and a roller rod connecting rod 53 arranged in sequence. One end of the roller rod connecting rod 53 is detachably connected to the roller rod 31. Preferably, a connecting sleeve 54 is arranged at the end of the roller rod connecting rod 53. The connecting sleeve 54 is detachably connected to the end of the roller rod 31 through a pin shaft, and the roller rod connecting rod 53 is in rotational sealing fit with the outer side surface of the sealing box 4. Furthermore, the sealing between the inside of the sealing box 4 and the replacement bin body 2 can be realized. On the one hand, it can prevent external air from entering the sealing box 4 and the replacement bin body 2. On the other hand, it can prevent the high temperature and a lot of dust in the replacement bin body 2 from affecting the power assembly 6.

[0060] In one embodiment, the power assembly 6 includes a driving shaft 61, a plurality of driving helical gears 62 arranged on the driving shaft 61 and a driven helical gear 63 arranged at the end of the transmission rod 51. The driven helical gears 63 on the plurality of transmission rods 51 are meshed with the driving helical gears 62.

[0061] In one embodiment, a transmission rod bearing seat 8 for supporting the transmission rod 51 is further arranged on the outer side of the sealing box 4;

[0062] In one embodiment, a graphite sleeve 7 is arranged on another side wall of the replacement bin body 2, and the other end of the roller rod 31 is rotatably arranged in the graphite sleeve 7. The roller rod 31 is rotatably arranged in the graphite sleeve 7 to realize the rotation of the roller rod 31.

[0063] The above is only this embodiment, and it does not impose any limitations on the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes, modifications or equivalent modifications to the technical solution of the present invention by using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A door assembly for a bin, characterized in that, It includes a support base (11), a door panel (12), a door panel driving mechanism (13) and a transition roller (14); The support base (11) includes two relatively arranged door panel mating plates (111) and roller mounting plates (112) arranged on both sides of the two door panel mating plates (111). The two door panel mating plates (111) and the two roller mounting plates (112) enclose a door panel accommodation cavity (115); Both ends of the transition roller (14) are rotatably arranged on the two roller mounting plates (112); Openings (1111) are arranged at opposite positions on the two door panel mating plates (111). The lower end surface of the opening (1111) is located below the support surface of the transition roller (14). The door panel driving mechanism (13) is used to drive the door panel (12) to enter or leave the door panel accommodation cavity (115), and when driving the door panel (12) into the door panel accommodation cavity (115), the door panel (12) blocks at least one of the openings (1111).

2. The bin door assembly according to claim 1, characterized in that, The door panel accommodation cavity (115) includes a door panel closed position at the opening (1111) and a door panel open position above the opening (1111); Both the door panel closed position and the door panel open position can independently accommodate the door panel (12).

3. The bin door assembly according to claim 1, characterized in that, The door panel mating plate (111) and the roller mounting plate (112) are connected to each other. It further includes a bottom plate (113) connecting the bottoms of the door panel mating plate (111) and the roller mounting plate (112) and a top plate (114) connecting the tops of the door panel mating plate (111) and the roller mounting plate (112). The door panel mating plate (111), the roller mounting plate (112), the bottom plate (113) and the top plate (114) enclose the door panel accommodation cavity (115).

4. The door assembly of the bin according to any one of claims 1-3, characterized in that, The door panel driving mechanism (13) includes a linear driving mechanism (131) arranged outside the top plate (114) of the door panel accommodation cavity (115) and at least two driving rods (132) slidably arranged through the top plate (114); One end of the driving rod (132) is connected to the output end of the linear driving mechanism (131), and the other end extends into the door panel accommodation cavity (115). At least two connecting rods (133) are hinged to the part of the driving rod (132) extending into the door panel accommodation cavity (115), and the door panel (12) is hinged to the other ends of the connecting rods (133); A limiting block (134) is arranged below the door panel accommodation cavity (115). After the linear driving mechanism (131) drives the door panel (12) to move down and abut against the limiting block (134), the door panel (12) horizontally moves through the connecting rods (133) to block the opening (1111).

5. The door assembly according to claim 4, characterized in that, There are two sets of the connecting rods (133), the door panels (12) and the limiting blocks (134) arranged radially. The two door panels (12) are respectively matched with the two openings (1111).

6. The magazine door assembly according to claim 4, characterized in that, The output end of the linear drive mechanism (131) is arranged away from the door panel accommodation cavity (115), and a connecting plate (135) is arranged on the output end of the linear drive mechanism (131), and at least two drive rods (132) are fixedly connected to the connecting plate (135).

7. The door assembly of the bin according to any one of claims 1-3, 5 or 6, characterized in that, An installation hole (1121) is arranged on the roller body mounting plate (112), a rotary seal (15) is arranged on the installation hole (1121), a bearing seat (16) is further arranged on the outer side of the roller body mounting plate (112), and two ends of the transition roller (14) respectively pass through the installation hole (1121) and cooperate with the rotary seal (15) and the bearing seat (16).

8. A replacement bin, characterized in that, It includes a replacement bin body (2) and a door assembly (1) as described in any one of claims 1-7 arranged on at least one side of the replacement bin body (2); A roller conveyor mechanism (3) is arranged in the replacement bin body (2), and the conveying plane of the roller conveyor mechanism (3) is flush with the supporting surface of the transition roller (14).

9. The replacement bin according to claim 8, characterized in that, A sealing box (4) is arranged on the side wall of the replacement bin body (2), a connecting rod assembly (5) is arranged on the outer side surface of the sealing box (4), and the end of a roller rod (31) in the roller conveyor mechanism (3) extends into the sealing box (4); One end of the connecting rod assembly (5) is connected to the roller rod (31) in the sealing box (4), and the other end extends out of the sealing box (4) and is connected to a power assembly (6).

10. The replacement bin according to claim 9, characterized in that, A graphite sleeve (7) is arranged on the other side wall of the replacement bin body (2), and the other end of the roller rod (31) is rotatably arranged in the graphite sleeve (7).

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