Anti-oxidation mesh belt furnace preheating zone structure

Abstract

The utility model discloses an anti-oxidation mesh belt furnace preheating zone structure, the mesh belt furnace comprises a furnace body, a support and a mesh belt mechanism, the support and the mesh belt mechanism are arranged on the inlet side of the furnace body, the mesh belt mechanism comprises a mesh belt and a mesh belt transmission assembly, the mesh belt extends from the support to the furnace body and penetrates through the furnace body, and the mesh belt transmission assembly drives the mesh belt to advance. A supporting frame is arranged between the support and the furnace body, and a lower supporting plate is arranged on the upper end face of the supporting frame so as to support the mesh belt. Side baffles are arranged on the portions, located on the two sides of the mesh belt, of the supporting frame correspondingly and extend to the position of an inlet of the furnace body. And a flame curtain assembly is arranged at the upper end of the furnace chamber inlet of the furnace body. According to the anti-oxidation mesh belt furnace preheating area structure, air entering the preheating area can be reduced, and the problems of oxidation and peeling of workpieces before the workpieces enter the protective atmosphere are solved.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment equipment technology, and in particular to an oxidation-resistant mesh belt furnace preheating zone structure. Background Technology

[0002] Mesh belt furnaces, also known as mesh belt heat treatment furnaces, are a type of equipment used to perform heat treatment processes such as carburizing / carbonitriding or austenitizing on metal products in a protective atmosphere. Currently, various industries use mesh belt heat treatment furnaces for batch processing of products.

[0003] A typical mesh belt heat treatment furnace usually includes a furnace body, a mesh belt for conveying products, a heating system, and a temperature / atmosphere control system. As a continuous heat treatment equipment, the mesh belt furnace usually places the products on the mesh belt in the feeding area. The products are then transported into the furnace by the mesh belt for heating, carburizing, and heat preservation. At the mesh belt outlet, the products fall into the oil tank to complete the quenching.

[0004] In the preheating zone of the mesh belt furnace, exhaust gases are burned, effectively isolating the furnace from air. The narrowing of the furnace opening ensures positive pressure within the furnace, while the parts are preheated in this area, preparing them for the next step of carburizing / carbonitriding. The quality of the preheating zone's structural design directly affects product quality. Combustible gases can burn below and on the sides of the mesh belt, causing excessively high temperatures at the furnace opening and mesh belt, leading to oxidation and peeling of the workpieces. Utility Model Content

[0005] The purpose of this invention is to provide an anti-oxidation structure for the preheating zone of a mesh belt furnace, which can prevent the workpiece from oxidizing and peeling due to excessively high temperatures in the preheating zone.

[0006] Based on the above problems, the technical solution provided by this utility model is as follows:

[0007] An oxidation-resistant mesh belt furnace preheating zone structure is disclosed. The mesh belt furnace includes a furnace body, a support frame disposed on the inlet side of the furnace body, and a mesh belt mechanism. The mesh belt mechanism includes a mesh belt extending from the support frame to and through the furnace body, and a mesh belt drive assembly for driving the mesh belt.

[0008] A support frame is provided between the bracket and the furnace body, and a lower support plate is provided on the upper end surface of the support frame to support the mesh belt;

[0009] The support frame is provided with side baffles on both sides of the mesh belt, and the side baffles extend to the furnace inlet position;

[0010] A flame curtain assembly is provided at the upper end of the furnace cavity inlet of the furnace body.

[0011] In some embodiments, the lower end face of the furnace inlet is provided with silicon carbide bricks to support the mesh belt and seal it in place.

[0012] In some embodiments, an upper baffle is fixed at the upper end of the furnace cavity behind the flame curtain assembly.

[0013] In some embodiments, the lower support plate, upper baffle, and side baffle are made of steel plates.

[0014] In some embodiments, the flame curtain assembly includes two flame curtains spaced apart along the direction of the conveyor belt, the upper ends of which are fixed to the furnace body and the lower ends of which extend above the conveyor belt.

[0015] In some embodiments, the side baffle includes a base plate and a side plate fixedly connected to the base plate, the base plate being fixed to the support frame, and the side plate extending from the base plate to above the support frame.

[0016] In some of these embodiments, the base plate is fixed to the support frame with screws.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] (1) A lower support plate is installed below the mesh belt at the furnace inlet, and side baffles are installed on both sides of the mesh belt. At the same time, a flame curtain assembly is installed at the upper end of the furnace inlet. This can play a sealing role, reduce the air entering the preheating zone from below, sides and above the mesh belt to generate high temperature, and avoid the workpiece from oxidizing and peeling before it is protected by the atmosphere.

[0019] (2) Silicon carbide bricks are provided on the lower end face of the furnace inlet. Silicon carbide bricks have a low coefficient of friction and high hardness, which can prevent the mesh belt from deforming due to excessive force, achieve the sealing between the mesh belt and the furnace body, and further avoid the preheating zone temperature from being too high.

[0020] (3) An upper baffle is fixed at the upper end of the furnace cavity behind the flame curtain assembly, which can further seal the furnace and reduce the amount of air entering the preheating zone. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an embodiment of the preheating zone structure of an oxidation-resistant mesh belt furnace according to this utility model;

[0023] Figure 2 This is a schematic diagram of the installation structure of the side baffle in an embodiment of the present utility model;

[0024] in:

[0025] 1. Furnace body;

[0026] 2. Bracket;

[0027] 3. Mesh conveyor belt;

[0028] 4. Support frame;

[0029] 5. Lower support plate;

[0030] 6. Side baffle; 6-1. Bottom plate; 6-2. Side plate;

[0031] 7. Flame Curtain;

[0032] 8. Upper baffle;

[0033] 9. Silicon carbide bricks;

[0034] 10. Workpiece. Detailed Implementation

[0035] The above solution will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrating the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0036] like Figure 1 As shown in the figure, this is an embodiment of the present invention, which provides an anti-oxidation mesh belt furnace preheating zone structure. The mesh belt furnace includes a furnace body 1 with front and rear openings, a support 2 set on the inlet side of the furnace body 1, and a mesh belt mechanism. The mesh belt mechanism includes a mesh belt 3 extending from the support 2 to the furnace body 1 and penetrating the furnace body, and a mesh belt drive assembly for driving the mesh belt 3. The mesh belt drive assembly includes a drive roller, multiple transmission rollers, and multiple support rollers. The drive roller is connected to a drive motor, and the drive motor rotates to drive the mesh belt 3 to move forward, so as to transport the workpiece 10 into the furnace cavity of the mesh belt furnace for heat treatment.

[0037] The preheating zone structure described above includes a support frame 4, a lower support plate 5, a side baffle 6, and a flame curtain assembly. The support frame 4 is located between the bracket 2 and the furnace body 1, and its height is lower than that of the bracket 2. The lower support plate 5 is made of steel plate and is set on the support frame 4 to support the lower surface of the mesh belt 3, thereby preventing air from entering the furnace body 1 from below the mesh belt 3.

[0038] like Figure 2As shown, there are two side baffles 6, which are respectively arranged on both sides of the mesh belt 3. The side baffles 6 extend to the furnace inlet, reducing the gap between the mesh belt 3 and the furnace wall of the preheating zone, thus preventing air from entering the furnace body 1 from the side of the mesh belt 3. The side baffles 6 are formed by bending steel plates and include a base plate 6-1 and a side plate 6-2 fixedly connected to the base plate 6-1. The base plate 6-1 is fixed to the support frame 4, and the side plate 6-2 extends from the base plate 6-1 to the top of the support frame 4. The base plate 6-1 is fixed to the support frame 4 with screws.

[0039] The flame curtain assembly is located at the upper end of the furnace cavity inlet. In this example, the flame curtain assembly includes two flame curtains 7 arranged at intervals along the traveling direction of the mesh belt 3. The upper end of the flame curtain 7 is fixed to the furnace body 1 by a support rod and the lower end extends above the mesh belt 3. The flame curtain 7 is made of refractory cotton in the prior art, which can prevent air from entering the preheating zone from the upper part of the furnace cavity inlet.

[0040] To further optimize the implementation effect of this utility model, an upper baffle 8 is fixed at the upper end of the furnace cavity behind the flame curtain assembly. Preferably, the upper baffle 8 is made of steel plate, which can further play a sealing role and reduce the amount of air entering the preheating zone.

[0041] In this example, the lower end face of the furnace body 1 inlet is provided with silicon carbide bricks 9 to support the mesh belt 3 and seal with the mesh belt 3. The silicon carbide bricks 9 are heat-resistant, have a low coefficient of friction and high hardness, which can prevent the mesh belt 3 from deforming due to excessive force, and the lower seal can prevent the temperature from being too high.

[0042] In summary, this preheating zone structure can reduce the amount of air entering the preheating zone of the mesh belt furnace from below, sides, and above the mesh belt, thus avoiding the problem of workpiece oxidation and peeling before the protective atmosphere is obtained due to excessively high preheating zone temperature.

[0043] The above examples are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An oxidation-resistant mesh belt furnace preheating zone structure, the mesh belt furnace comprising a furnace body, a support frame disposed on the inlet side of the furnace body, and a mesh belt mechanism, the mesh belt mechanism comprising a mesh belt extending from the support frame to the furnace body and penetrating the furnace body, and a mesh belt drive assembly for driving the mesh belt forward, characterized in that: A support frame is provided between the bracket and the furnace body, and a lower support plate is provided on the upper end surface of the support frame to support the mesh belt; The support frame is provided with side baffles on both sides of the mesh belt, and the side baffles extend to the furnace inlet position; A flame curtain assembly is provided at the upper end of the furnace cavity inlet of the furnace body.

2. The anti-oxidation mesh belt furnace preheating zone structure according to claim 1, characterized in that: The lower end face of the furnace body inlet is provided with silicon carbide bricks to support the mesh belt and seal it in place.

3. The anti-oxidation mesh belt furnace preheating zone structure according to claim 1, characterized in that: An upper baffle is fixed at the upper end of the furnace cavity behind the flame curtain assembly.

4. The anti-oxidation mesh belt furnace preheating zone structure according to claim 3, characterized in that: The lower support plate, upper baffle, and side baffle are made of steel plates.

5. The anti-oxidation mesh belt furnace preheating zone structure according to claim 1, characterized in that: The flame curtain assembly includes two flame curtains arranged at intervals along the direction of the conveyor belt, with the upper end of the flame curtain fixed to the furnace body and the lower end extending above the conveyor belt.

6. The anti-oxidation mesh belt furnace preheating zone structure according to claim 1, characterized in that: The side baffle includes a base plate and a side plate fixedly connected to the base plate. The base plate is fixed on the support frame, and the side plate extends from the base plate to the top of the support frame.

7. The anti-oxidation mesh belt furnace preheating zone structure according to claim 6, characterized in that: The base plate is fixed to the support frame with screws.

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