Kiln roller bar supporting device and kiln thereof

Abstract

The utility model belongs to the field of kilns, and particularly relates to a kiln roller bar supporting device and a kiln thereof, the kiln roller bar supporting device comprises a supporting frame, a supporting plate and a plurality of supporting rods; the support frame is arranged outside the furnace body; the supporting rod is arranged on the furnace body in a sliding mode, one end of the supporting rod extends into the furnace body and supports the supporting plate, and the other end of the supporting rod extends out of the furnace body and is arranged on the supporting frame in a height-adjustable mode. The supporting plate is used for rotationally installing a roller of a roller way conveying mechanism in the furnace body. According to the kiln roller bar supporting device, the weight of the roller bar of the roller way conveying mechanism in the kiln body and the weight of materials on the roller bar can be transferred to the supporting frame which is arranged outside the kiln body and is independent of the kiln body, so that the bearing load of the kiln body can be reduced, and the bearing weight of the roller way conveying mechanism can be improved; and the height of the supporting rods can be adjusted, so that the supporting plates and the roller bars rotationally matched with the supporting plates can be subjected to leveling and height adjustment on the basis that the furnace body is not opened from the outside.

Description

Technical Field

[0001] The utility model belongs to the field of kilns, and particularly relates to a roller support device for a kiln and a kiln thereof. Background Art

[0002] Rollers are common parts used for conveying materials in a production line. According to different roller materials, they can be used in different environments. For example, in the glass and ceramics industry, silicon carbide rollers are key components of roller hearth kilns, used for transporting ceramic or glass products, and can withstand high temperatures, so they play an important role in industrial production.

[0003] The rollers of a common atmosphere-protected roller hearth kiln are supported by roller assemblies in sealed boxes on both sides of the furnace body. The weight of the products and the rollers is borne by the furnace body, increasing the thickness of the furnace body and the risk of high-temperature deformation. For this reason, a roller support device for a kiln is proposed. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a roller support device for a kiln and a kiln thereof, in which the weight of the materials is not borne by the furnace body.

[0005] The utility model provides a roller support device for a kiln, including a support frame, a support plate, and a plurality of support rods;

[0006] The support frame is arranged outside the furnace body;

[0007] The support rod is slidably arranged on the furnace body, and one end of the support rod extends into the furnace body and supports the support plate, and the other end extends outside the furnace body and is arranged on the support frame in a height-adjustable manner;

[0008] The support plate is used for rotatably installing the rollers of the roller conveyor mechanism in the furnace body.

[0009] Furthermore, a plurality of groups of rotational connection structures are arranged on the support plate, and one rotational connection structure is rotatably connected to one of the rollers.

[0010] Furthermore, the rotational connection structure includes two parallel rollers, and the roller surfaces of the two rollers protrude from the upper surface of the support plate, and the roller is in tangential cooperation with the two rollers.

[0011] Furthermore, a sliding hole is arranged on the furnace body, and the support rod is slidably arranged on the sliding hole;

[0012] A sliding seal is further arranged outside the sliding hole, and the sliding seal enables the support plate to be hermetically slidably arranged on the sliding hole.

[0013] Further, the sliding seal includes a sealing ring disposed at the outer end of the sliding hole and a sealing disc that presses the sealing ring against the outer end of the sliding hole. The sealing disc is detachably disposed on the furnace body through a fastener.

[0014] Further, a sleeve is disposed on the support frame, the support rod is sleeved on the sleeve, and a nut is screwed to the lower end of the support rod, and the nut abuts against the upper end of the sleeve.

[0015] Further, the roller rod support device of the kiln furnace further includes a sealed box disposed on the side of the furnace body and communicating with the furnace body;

[0016] The support frame is disposed below the sealed box, and the support rod is slidably disposed at the bottom of the sealed box.

[0017] The utility model provides a kiln furnace, which is characterized by comprising a furnace body, a roller conveyor mechanism, and at least one set of the above-mentioned roller rod support device of the kiln furnace;

[0018] The roller conveyor mechanism includes a plurality of roller rods arranged in parallel. One end of the plurality of roller rods is connected to a roller rod driving mechanism, and at least one end is rotatably disposed on the support plate of the roller rod support device of the kiln furnace.

[0019] Further, a furnace body discharge port is disposed on one side of the non-driving end of the roller rod of the furnace body, and a material carrying platform is disposed at the lower end of the furnace body discharge port;

[0020] A material lifting mechanism for lifting the material on the roller conveyor mechanism and a material pushing mechanism for pushing the material lifted by the material lifting mechanism out of the furnace body through the furnace body discharge port are further disposed in the furnace body.

[0021] Further, a plurality of groups of the material lifting mechanisms are provided. The material lifting mechanism includes a lifting driving mechanism and a material lifting plate. The lifting driving mechanism is disposed at the bottom outside the furnace body, and the output end of the lifting driving mechanism penetrates the bottom wall of the furnace body to fix the material lifting plate. The material lifting plate is lifted between the gaps of the two roller rods;

[0022] The material pushing mechanism includes a linear driving mechanism disposed outside the furnace body. The output end of the linear driving mechanism penetrates the outer wall of the furnace body and extends into the roller rod, and is used to push the material carried by the material lifting plate out of the furnace body through the furnace body discharge port.

[0023] The beneficial effects of the present utility model are as follows. The kiln roller support device provided by the present utility model can transfer the weight of the rollers of the roller conveyor mechanism in the furnace body and the weight of the materials on the rollers to the support frame independent of the furnace body outside the furnace body, thereby reducing the bearing burden of the furnace body and increasing the bearing weight of the roller conveyor mechanism. In addition, the cooperation of the support plate and the support rod, while ensuring the sealing of the furnace body, does not occupy the conveying space inside the furnace body, and the support rod can also adjust the height, so that the support plate and the rollers rotatably fitted thereon can be leveled and the height can be adjusted without opening the furnace body externally. Description of the Drawings

[0024] Attached Figure 1 is the front view of one embodiment of the present utility model;

[0025] Attached Figure 2 is Figure 1 the sectional view taken along the line A-A in the attached figure;

[0026] Attached Figure 3 is Figure 2 the enlarged partial view at B in the attached figure;

[0027] Attached Figure 4 is Figure 3 the enlarged partial view at C in the attached figure;

[0028] Attached Figure 5 is the side view of one embodiment of the present utility model;

[0029] Attached Figure 6 is the front view of another embodiment of the present utility model;

[0030] Attached Figure 7 is Figure 6 the sectional view taken along the line D-D in the attached figure;

[0031] Attached Figure 8 is the top view of another embodiment of the present utility model;

[0032] Attached Figure 9 is Figure 8 the sectional view taken along the line E-E in the attached figure.

[0033] In the figure, 1 - Furnace roller support device; 11 - Support frame; 111 - Sleeve; 12 - Sealing box; 121 - Sliding hole; 13 - Support plate; 131 - Vertical plate; 132 - Horizontal plate; 14 - Support rod; 15 - Roller; 16 - Sliding seal; 161 - Sealing ring; 162 - Sealing disc; 1621 - Fitting groove; 1622 - Cooling channel; 1623 - Water inlet; 1624 - Water outlet; 17 - Nut; 2 - Furnace body; 21 - Furnace body discharge port; 22 - Furnace body feed port; 23 - Thermal insulation layer; 24 - Material bearing platform; 3 - Roller conveyor mechanism; 31 - Roller; 32 - Roller drive mechanism; 4 - Material lifting mechanism; 41 - Lifting drive mechanism; 42 - Material lifting plate; 5 - Material pushing mechanism; 51 - Linear drive mechanism; 52 - Pushing block; 6 - Furnace door; 7 - Feed furnace; 8 - Discharge furnace. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0036] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection, an electrical connection, a physical connection or a wireless communication connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. 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.

[0038] 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 is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] As shown in the Figure 1 - attached Figure 5 drawing, the present utility model provides a kiln roller support device 1, which includes a support frame 11, a support plate 13 and a plurality of support rods 14; the support frame 11 is arranged outside the furnace body 2; the support rods 14 are slidably arranged on the furnace body 2, and one end of the support rod 14 extends into the furnace body 2 and supports the support plate 13. Preferably, the support rods 14 are arranged in a vertical state. One end of the support rod 14 extends into the furnace body 2 and supports the support plate 13, and the support plate 13 is supported by the upper ends of a plurality of support rods 14 together. The other end of the support rod 14 extends out of the furnace body 2 and is arranged on the support frame 11 with adjustable height. By adjusting the height of some support rods 14, the support plate 13 can be leveled, and by synchronously adjusting the height of all support rods 14, the height of the support plate 13 can be adjusted.

[0040] The support plate 13 is used for rotatably installing the roller 31 of the roller conveyor mechanism 3 in the furnace body 2. In this way, the roller 31 located in the furnace body 2 can bear the weight by the support frame 11 outside the furnace body 2. Furthermore, the roller 31 and the materials transported above the roller 31 can be borne by the support frame 11 outside the furnace body 2, reducing the bearing burden of the furnace body 2.

[0041] The kiln roller support device 1 provided by the utility model can transfer the weight of the rollers 31 of the roller conveyor mechanism 3 in the furnace body 2 and the weight of the materials on the rollers 31 to the support frame 11 independent of the furnace body 2 outside the furnace body 2, thereby reducing the load-bearing burden of the furnace body 2, increasing the load-bearing weight of the roller conveyor mechanism 3, and finally reducing the thickness of the furnace body 2, lowering the processing requirements of the furnace body 2 and reducing its stress deformation. In addition, the cooperation of the support plate 13 and the support rod 14, while ensuring the sealing of the furnace body 2, does not occupy the conveying space inside the furnace body 2, and the support rod 14 can also adjust the height, so that the support plate 13 and the rollers 31 rotatably fitted thereon can be leveled and the height can be adjusted without opening the furnace body 2 externally.

[0042] In one embodiment, a plurality of sets of rotating connection structures are provided on the support plate 13, and one rotating connection structure is rotatably connected to one roller 31. By providing the rotating rod connection structure, the rotational stability of the support plate 13 and the roller 31 can be improved. Preferably, the rotating connection structure can be a rotating hole, and the rotating hole is connected to the roller 31 through a bearing, or can be a bearing seat and a bearing rotatably fitted with the roller 31. In a preferred embodiment, the rotating connection structure includes two parallel rollers 15, and the roller surfaces of the two rollers 15 protrude from the upper surface of the support plate 13, and the roller 31 is in tangential cooperation with the two rollers 15. In this embodiment, the roller 31 is directly placed on the two rollers 15, and it is extremely convenient and fast to install the roller 31 on the rotating connection structure, and the rotating effect is good. Moreover, when adjusting the height and levelness of the support plate 13, the corresponding rotating connection structure will also be adjusted accordingly. At this time, since the roller 31 only cooperates with the two rollers 15 below, when adjusting the height of the rotating connection structure, the free movement space of the roller 31 is large, and there will be no interference and jamming, thereby simplifying the difficulty of leveling the roller 31. In a preferred embodiment, the support plate 13 includes a vertical plate 131 and a horizontal plate 132 provided on one side of the lower end of the vertical plate 131; the roller 15 is rotatably provided above the vertical plate 131, and the horizontal plate 132 is fixedly connected to the support rod 14. This setting not only facilitates the installation of the roller 15 but also facilitates the connection of the support rod 14, simplifying the connection structure.

[0043] In one embodiment, a sliding hole 121 is provided on the furnace body 2, and the support rod 14 is slidably provided on the sliding hole 121, so that one end of the support rod 14 is located inside the furnace body 2 and the other end is located outside the furnace body 2, and at the same time, the relative sealing of the furnace body 2 is realized;

[0044] A sliding seal 16 is further provided outside the sliding hole 121, and the sliding seal 16 enables the support plate 13 to be slidably sealed on the sliding hole 121, and the sliding seal 16 further improves the sealing performance of the furnace body 2 and prevents the loss of temperature and atmosphere inside the furnace body 2.

[0045] In one embodiment, the sliding seal 16 includes a sealing ring 161 disposed at the outer end of the sliding hole 121 and a sealing disk 162 that presses the sealing ring 161 against the outer end of the sliding hole 121. The sealing ring 161 is used to seal the gap between the support rod 14 and the sliding hole 121 to ensure tightness, while the sealing disk 162 is used to fix the sealing ring 161 at the outer end position of the sliding hole 121. The sealing disk 162 is detachably disposed on the furnace body 2 through fasteners, thereby facilitating the disassembly, assembly, and replacement of the sealing ring 161. Preferably, the sealing disk 162 is provided with a through hole that slidably cooperates with the support rod 14, and a fitting groove 1621 for accommodating the sealing ring 161 is provided outside the through hole on the side of the sealing disk 162 close to the furnace body 2.

[0046] In one embodiment, a water-cooling structure is provided on the sealing disk 162, which can cool the sealing ring 161 to avoid the failure of the sealing ring 161 and improve its service life. Preferably, the water-cooling structure includes a cooling channel 1622 disposed in the sealing disk 162, an inlet 1623 and an outlet 1624 communicating with the cooling channel 1622, and a cooling medium circulation device externally connected to the inlet 1623 and the outlet 1624. More preferably, an annular groove is provided at one end of the sealing disk 162 that fits and installs with the furnace body 2. The annular groove is a stepped groove, and an annular plate is welded at the step of the stepped groove. The annular plate and the small groove of the stepped groove form the cooling channel 1622, thereby simplifying the processing of the cooling channel 1622 and reducing production costs.

[0047] In one embodiment, a sleeve 111 is provided on the support frame 11, and the support rod 14 is sleeved on the sleeve 111. This setting can simplify the installation of the support rod 14 and the support frame 11, and at the same time can avoid the displacement of the support rod 14 except for the axis direction, improving the structural stability. A nut 17 is screwed at the lower end of the support rod 14, and the nut 17 abuts against the upper end of the sleeve 111. With this setting, by rotating the nut 17, the height of the support rod 14 can be changed, making the height adjustment of the support rod 14 extremely convenient and fast.

[0048] In one embodiment, the kiln roller support device 1 further includes a sealed box 12 disposed on the side of the furnace body 2 and communicating with the furnace body 2. By providing the sealed box 12, on the basis of ensuring tightness, the end of the roller 31 can be disposed outside the conveying space of the furnace body 2, and the rotating part can be separated from the conveying space inside the furnace body 2. Preferably, a heat-insulating layer 23 is provided inside the furnace body 2, and the sealed box 12 is disposed outside the heat-insulating layer 23. Preferably, the sealed box 12 is formed by protruding outward from the side wall of the furnace body 2. Preferably, an opening is provided on the side wall of the furnace body 2, and the sealed box 12 is sleeved on the outer wall of the opening. Preferably, at least part of the sealed box 12 is made of a transparent material, which can facilitate the observation of the state of the roller 31.

[0049] The support frame 11 is arranged below the sealed box 12, and the support rod 14 is slidably arranged at the bottom of the sealed box 12. At this time, the support rod 14 indirectly slides on the furnace body 2 through the sealed box 12. In this embodiment, the sliding hole 121 of the furnace body 2 is arranged on the bottom surface of the sealed box 12.

[0050] The present invention also provides a kiln, including a furnace body 2, a roller conveyor mechanism 3, and at least one set of the above-mentioned kiln roller rod support devices 1;

[0051] The roller conveyor mechanism 3 includes a plurality of roller rods 31 arranged in parallel. One end of the plurality of roller rods 31 is connected to the roller rod driving mechanism 32, and at least one end is rotatably arranged on the support plate 13 of the kiln roller rod support device 1. That is, both the driving end and the non-driving end of the roller rod 31 can be rotationally supported by the kiln roller rod support device 1, reducing the load-bearing burden of the furnace body 2.

[0052] Refer to the attached Figure 6 - attached Figure 9 In one embodiment, a furnace body discharge port 21 is arranged on one side of the non-driving end of the roller rod 31 of the furnace body 2. At this time, the non-driving end side of the roller rod 31 is rotationally supported by the above-mentioned kiln roller rod support device 1 without the sealed box 12. At this time, there is no entity above or outside the non-driving end of the roller rod 31. Therefore, the material can be directly discharged from the non-driving end side of the roller rod 31, improving the diversity of material discharging. A material bearing platform 24 is arranged at the lower end of the furnace body discharge port 21, that is, the material discharged from the non-driving end direction of the roller rod 31 passes through the material bearing platform 24 and then leaves from the furnace body discharge port 21, thereby improving the stability of the discharging process;

[0053] A material lifting mechanism 4 for lifting the material on the roller conveyor mechanism 3 and a material pushing mechanism 5 for pushing the material lifted by the material lifting mechanism 4 out of the furnace body 2 from the furnace body discharge port 21 are further arranged in the furnace body 2. The material lifting mechanism 4 is used to lift the material on the roller conveyor mechanism 3, thereby avoiding the wear of the roller rod 31 caused by the material moving along the axis of the roller rod 31 and the damage caused by uneven axial force on the roller rod 31. After the material is lifted by the material lifting mechanism 4, the material pushing mechanism 5 pushes the material to the material bearing platform 24 and the furnace body discharge port 21 in sequence. In this embodiment, the material can be conveyed in the 90° turning direction of the conveying direction of the roller conveyor mechanism 3, thereby providing the reversing conveying of the material.

[0054] In one embodiment, several groups of material lifting mechanisms 4 are provided. The material lifting mechanism 4 includes a lifting drive mechanism 41 and a material lifting plate 42. The lifting drive mechanism 41 is arranged at the bottom outside the furnace body 2. The output end of the lifting drive mechanism 41 penetrates the bottom wall of the furnace body 2 to fix the material lifting plate 42. The material lifting plate 42 lifts between the gaps of two roller rods 31. When multiple material lifting plates 42 lift synchronously, the materials on the roller rods 31 can be lifted up.

[0055] The material pushing mechanism 5 includes a linear drive mechanism 51 arranged outside the furnace body 2. The output end of the linear drive mechanism 51 penetrates the outer wall of the furnace body 2 and extends into the roller rod 31, and is used to push the material carried by the material lifting plate 42 to leave the furnace body 2 from the furnace body discharge port 21. Preferably, a pushing block 52 is arranged at the part of the output end of the linear drive mechanism 51 located inside the furnace body 2 to improve the pushing effect of the material.

[0056] In one embodiment, a furnace body inlet 22 is provided at the upstream section of the furnace body 2 located on the roller conveyor mechanism 3. The material enters the furnace body 2 and the roller conveyor mechanism 3 through the furnace body inlet 22, and is finally pushed out from the furnace body discharge port 21 by the material pushing mechanism 5.

[0057] In one embodiment, a feeding furnace 7 is connected to one end of the furnace body 2 where the furnace body inlet 22 is located, and a discharging furnace 8 is connected to one end of the furnace body 2 where the furnace body discharge port 21 is located. In a specific application scenario, the discharging furnace 8 is a heating furnace for firing materials, the feeding furnace 7 is a replacement furnace, the furnace body 2 is a transition furnace, and furnace doors 6 are provided at both ends of the replacement furnace. A furnace door 6 is also provided between the heating furnace and the transition furnace. The material is evacuated of oxygen and filled with a protective gas through the replacement furnace, and then is transported to the heating furnace after being reversed through the transition furnace. At this time, the size of the furnace doors 6 at both ends of the replacement furnace can be reduced, thereby reducing the overall sealing requirement of the kiln.

[0058] The above is only this embodiment and does not impose any limitation 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 equivalents to equivalent embodiments 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 kiln roller support device, characterized in that: It comprises a support frame (11), a support plate (13) and a plurality of support rods (14); The support frame (11) is arranged outside the furnace body (2); The support rod (14) is slidably arranged on the furnace body (2), and one end of the support rod (14) extends into the furnace body (2) and supports the support plate (13), and the other end extends out of the furnace body (2) and is arranged on the support frame (11) in an adjustable height; The support plate (13) is used to rotatably mount a roller bar (31) of a roller conveying mechanism (3) in the furnace body (2).

2. The kiln roller support device according to claim 1, characterized in that: The support plate (13) is provided with a plurality of groups of rotational connection structures, and one rotational connection structure is rotationally connected to one of the rollers (31).

3. The kiln roller support device according to claim 2, characterized in that: The rotating connection structure comprises two rollers (15) arranged in parallel, the wheel surfaces of the two rollers (15) protrude from the upper surface of the support plate (13), and the roller rod (31) is tangentially matched with the two rollers (15).

4. The kiln roller support device according to any one of claims 1 to 3, characterized in that: The furnace body (2) is provided with a sliding hole (121), and the support rod (14) is slidably arranged on the sliding hole (121); A sliding seal (16) is also provided on the outside of the sliding hole (121), and the sliding seal (16) enables the support plate (13) to be sealingly slidably disposed on the sliding hole (121).

5. The kiln roller support device according to claim 4, characterized in that: The sliding seal (16) comprises a sealing ring (161) arranged at the outer end of the sliding hole (121) and a sealing disk (162) pressing the sealing ring (161) against the outer end of the sliding hole (121); the sealing disk (162) is detachably arranged on the furnace body (2) via a fastener.

6. The kiln roller support device according to any one of claims 1 to 3, characterized in that: The support frame (11) is provided with a sleeve (111), the support rod (14) is sleeved on the sleeve (111), the lower end of the support rod (14) is threaded with a nut (17), and the nut (17) abuts against the upper end of the sleeve (111).

7. The kiln roller support device according to any one of claims 1 to 3 and 5, characterized in that: It also includes a sealing box (12) arranged on the side of the furnace body (2) and connected to the furnace body (2); The support frame (11) is arranged below the sealing box (12), and the support rod (14) is slidably arranged at the bottom of the sealing box (12).

8. A kiln, characterized in that: It comprises a furnace body (2), a roller conveying mechanism (3) and at least one set of kiln roller support devices according to any one of claims 1 to 6; The roller conveying mechanism (3) comprises a plurality of rollers (31) arranged in parallel, one end of each of the rollers (31) is connected to a roller driving mechanism (32), and at least one end is rotatably arranged on a support plate (13) of the kiln roller supporting device.

9. The kiln according to claim 8, characterized in that: The furnace body (2) is provided with a furnace body discharge port (21) on one side of the non-driving end of the roller (31), and a material carrying platform (24) is provided at the lower end of the furnace body discharge port (21); The furnace body (2) is also provided with a material lifting mechanism (4) for lifting the material on the roller conveying mechanism (3) and a material pushing mechanism (5) for pushing the material lifted by the material lifting mechanism (4) out of the furnace body (2) from the furnace body discharge port (21).

10. The kiln according to claim 9, characterized in that: The material lifting mechanism (4) is provided with a plurality of groups, and the material lifting mechanism (4) comprises a lifting drive mechanism (41) and a material lifting plate (42). The lifting drive mechanism (41) is provided at the outer bottom of the furnace body (2). The output end of the lifting drive mechanism (41) passes through the bottom wall of the furnace body (2) to fix the material lifting plate (42). The material lifting plate (42) is lifted and lowered between the gaps between the two rollers (31). The material pushing mechanism (5) comprises a linear drive mechanism (51) arranged on the outside of the furnace body (2); the output end of the linear drive mechanism (51) penetrates the outer wall of the furnace body (2) and extends into the roller (31), and is used to push the material carried by the material lifting plate (42) to leave the furnace body (2) from the furnace body discharge port (21).

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