Anti-deviation tunnel type oven

Abstract

The anti-deviation tunnel type oven comprises an oven body, a heating element arranged in the oven body and a conveying mechanism penetrating through the oven body, the conveying mechanism comprises a driving roller, a driven roller and a conveying belt surrounding the driving roller and the driven roller, and a plurality of anti-deviation carrier roller sets are further arranged below the conveying belt and located between a bearing section and a return stroke section of the conveying belt. The deviation-preventing carrier roller set is formed by splicing two symmetrical conical carrier rollers, the narrow ends of the two conical carrier rollers are close to each other and connected to form a V-shaped guide groove, the return stroke section of the conveying belt is supported in the V-shaped guide groove, and a heat insulation plate is further arranged between the bearing section and the return stroke section of the conveying belt. The V-shaped groove formed by the conical carrier roller sets is arranged, natural centering guiding is carried out on the return stroke section of the conveying belt, automatic deviation rectification is achieved, the arranged heat insulation plate can remarkably reduce the working environment temperature of the carrier roller sets, the problems of bearing lubrication failure and aging are solved, the service life of the carrier roller sets is prolonged, and the reliability of the carrier roller sets is improved.

Description

Technical Field

[0001] The invention relates to the technical field of river demarcation, in particular to an anti-drift tunnel oven. Background Art

[0002] After forming, magnetic materials (such as NdFeB and ferrite) must undergo high-temperature sintering. This allows the powder particles to combine into a dense body through processes such as diffusion and recrystallization, significantly enhancing the material's magnetic properties. Tunnel-type ovens are often used for this sintering process. Tunnel ovens use internal heating elements to heat the magnetic material as it passes continuously on a conveyor belt. In actual production, the conveyor belts within tunnel ovens are prone to deviation due to the long-term high temperature and high load conditions. This deviation can lead to uneven heating of the magnetic material and, in severe cases, can even cause friction with the oven body, causing wear and tear at the belt edges, or even jamming and shutdown.

[0003] The common anti-deviation method in the existing technology is to set simple stop wheels or limit rods on both sides of the conveyor belt. However, in a high temperature environment, the lubricating grease in the stop wheel bearings easily dries up, causing the stop wheel to get stuck and not rotate, which in turn aggravates the scratching and wear on the conveyor belt.

[0004] Therefore, we propose an anti-drift tunnel oven to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide an anti-drift tunnel oven to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A tunnel oven with anti-deviation comprises a furnace body, a heating element arranged in the furnace body and a conveying mechanism that passes through the furnace body. The conveying mechanism comprises a driving roller, a driven roller and a conveyor belt that surrounds the two. Below the conveyor belt, a plurality of anti-deviation roller groups are also arranged between its load-bearing section and return section. The anti-deviation roller group is composed of two symmetrical conical rollers, and the narrower ends of the two conical rollers are close to each other and connected to form a "V"-shaped guide groove. The return section of the conveyor belt is supported in the "V"-shaped guide groove. A heat insulation plate is also provided between the load-bearing section and the return section of the conveyor belt.

[0008] In a further embodiment, the heating element is composed of a plurality of heating tubes, and the heating tubes are gradually dispersed from the middle of the furnace body to both ends.

[0009] In a further embodiment, a plurality of anti-deflection roller groups are arranged at intervals along the running direction of the conveyor belt, and the anti-deflection roller groups are rotatably connected to the frame.

[0010] In a further embodiment, the angle formed between the generatrix of the tapered roller and its axis is 2-5°.

[0011] In a further embodiment, the thermal insulation board is composited by an aluminum foil layer, a ceramic fiber felt layer and a stainless steel plate layer distributed sequentially from top to bottom.

[0012] In a further embodiment, a tensioning roller is provided below the return section of the conveyor belt, both ends of the tensioning roller are rotatably connected to sliders, the sliders are rotatably connected to the straight rails, and a telescopic part is installed under the sliders.

[0013] In a further embodiment, the tensioning roller adopts the same tapered structure as the anti-deflection roller group, with thick ends and a thin middle.

[0014] In a further embodiment, pressure sensors are evenly distributed along the circumference on the inner wall of the tensioning roller.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a "V"-shaped groove composed of a tapered roller group to naturally guide the return section of the conveyor belt. When the conveyor belt deviates to one side, it will generate friction with the tapered surface on the corresponding side. This friction will generate a component force that moves the conveyor belt toward the center, thereby realizing automatic deviation correction. In addition, the provided heat insulation plate can significantly reduce the working environment temperature of the anti-deviation roller group, slow down the problems of bearing lubrication failure and aging, and extend its service life and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the frame housing of the present invention after partial sectioning;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention when viewed from above;

[0020] Figure 4 It is a schematic diagram of the internal structure of the furnace body of the present invention when viewed from above.

[0021] In the figure: 1. furnace body; 2. heating element; 3. conveyor belt; 4. driving roller; 5. driven roller; 6. frame; 7. anti-deviation roller group; 71. tapered roller; 8. heat insulation board; 9. tensioning roller; 10. slider; 11. straight rail; 12. telescopic part. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0025] See also Figure 1-4 A tunnel oven with anti-drifting function mainly includes a furnace body 1, a heating element 2 installed on the top of the furnace body 1, and a conveying mechanism passing through the furnace body 1. The heating element 2 is composed of a plurality of heating tubes, and the heating tubes are gradually dispersed from the middle of the furnace body 1 to both ends, so that the temperature in the furnace body 1 shows a gradual trend, first preheating, then concentrated heating, and finally gradually cooling down. The conveying mechanism consists of an active roller 4, a driven roller 5 and a high-temperature resistant conveyor belt 3 surrounding the two. The active roller 4 and the driven roller 5 are rotatably installed in a frame 6, and a motor for driving the active roller 4 is installed outside the frame 6.

[0026] Between the load-bearing section and the return section of the conveyor belt 3, a group of anti-deviation roller groups 7 are set at a certain distance along the length direction of the conveyor belt 3. Each group of anti-deviation roller groups 7 is composed of two symmetrical conical rollers 71. The conical rollers 71 are installed on the frame 6 below through a bracket, and the narrower ends of the two conical rollers 71 are close to each other and connected. The busbars thereof have an angle of 3° with the axis centerline, thereby forming a "V"-shaped guide groove with an opening upward. The return section of the conveyor belt 3 naturally falls into and is supported in this "V"-shaped groove. During operation, the deviation tendency of the conveyor belt 3 will be automatically corrected by the conical surface.

[0027] An insulation board 8 is also provided between the load-bearing section and the return section of the conveyor belt 3. The insulation board 8 is composed of an aluminum foil layer, a ceramic fiber felt layer and a stainless steel plate layer distributed from top to bottom. The aluminum foil layer has a high reflectivity and can reflect most of the heat radiation back into the furnace, reducing heat absorption. It is the most effective way to isolate radiant heat. The ceramic fiber felt layer is the main insulation barrier. There are a large number of tiny air pores inside, which can greatly hinder heat conduction and convection. The stainless steel plate layer provides mechanical strength and rigidity for the entire insulation board 8, which is easy to install and fix, while protecting the fragile insulation material in the middle from being damaged by the vibration of the roller group or accidental touch.

[0028] The cam 11 is connected to the transmission belt 3 and the cam 12 is connected to the transmission belt 3 so that the cam 11 can be tightened and the cam 12 can be adjusted.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An anti-drift tunnel oven, comprising a furnace body (1), a heating element (2) disposed in the furnace body (1), and a conveying mechanism penetrating the furnace body (1), the conveying mechanism comprising a driving roller (4), a driven roller (5), and a conveyor belt (3) surrounding the driving roller and the driven roller, characterized in that: A plurality of anti-deflection roller groups (7) are provided below the conveyor belt (3) and between its load-bearing section and return section. The anti-deflection roller group (7) is formed by splicing two symmetrical tapered rollers (71), and the narrower ends of the two tapered rollers (71) are close to each other and connected to form a "V"-shaped guide groove. The return section of the conveyor belt (3) is supported in the "V"-shaped guide groove. A heat insulation plate (8) is also provided between the load-bearing section and the return section of the conveyor belt (3).

2. The anti-drift tunnel oven according to claim 1, characterized in that: The heating element (2) is composed of a plurality of heating tubes, and the heating tubes are gradually dispersed and arranged from the middle of the furnace body (1) to both ends.

3. The anti-drift tunnel oven according to claim 1, characterized in that: The anti-deflection roller groups (7) are arranged in multiple groups at intervals along the running direction of the conveyor belt (3), and the anti-deflection roller groups (7) are rotatably connected to the frame (6).

4. The anti-drift tunnel oven according to claim 1, characterized in that: The angle formed between the generatrix of the tapered roller (71) and its axis is 2-5°.

5. The anti-drift tunnel oven according to claim 1, characterized in that: The heat insulation board (8) is formed by compounding an aluminum foil layer, a ceramic fiber felt layer and a stainless steel plate layer which are sequentially distributed from top to bottom.

6. The anti-drift tunnel oven according to claim 1, characterized in that: A tensioning roller (9) is also provided below the return section of the conveyor belt (3). Both ends of the tensioning roller (9) are rotatably connected to sliders (10). The sliders (10) are rotatably connected to the straight rails (11), and a telescopic member (12) is also installed below the sliders (10).

7. The anti-drift tunnel oven according to claim 6, characterized in that: The tensioning roller (9) adopts the same tapered structure as the anti-deflection roller group (7), with thick ends and thin middle.

8. The anti-drift tunnel oven according to claim 6, characterized in that: Pressure sensors are evenly inlaid on the inner wall of the tensioning roller (9) along the circumferential direction.

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