Feeding port of mesh belt furnace for reducing oxidation of heat treatment products

Abstract

The utility model belongs to the technical field of mesh belt furnaces, and particularly relates to a feed port of a mesh belt furnace for reducing oxidation of heat treatment products, which comprises a mesh belt furnace body, the mesh belt furnace body comprises a mounting frame and a furnace body, and a conveying device for conveying products is mounted on the mounting frame; a furnace body used for machining products is installed on the installation frame and comprises an inlet in one side and an outlet in the other side, a conveying device penetrates through the inlet to feed the products into the furnace body, and a lifting door is arranged on one side of the inlet. According to the utility model, at least two gas spraying pipes are mounted at the inlet, during feeding, the valve I is opened, the gas outlet pump is started, inert gas in the gas box is sprayed out through the gas spraying holes to form gas curtains, so that air is better prevented from entering, and the valve II can be opened or closed according to requirements, so that the number of the gas curtains is adjusted; due to the fact that the nitrogen is inert gas, the workpiece cannot be oxidized, and a barrier can be formed to prevent air from entering only through a small amount of gas.

Description

Technical Field

[0001] The utility model relates to the technical field of mesh belt furnaces, in particular to a feeding port of a mesh belt furnace for reducing oxidation of heat-treated products. Background Art

[0002] The mesh belt furnace is a continuous furnace that completes a set of heat treatment processes by laying the heat-treated workpieces flat on the mesh belt. Therefore, the workpieces are placed continuously from the entrance to the furnace for heating, and the furnace door and other structural parts cannot be used to isolate the furnace from the outside. When the workpiece enters the furnace, the temperature rises from room temperature to the operating temperature (usually 850-930℃). When there is air in the high-temperature area, the oxidation of the workpiece will be aggravated.

[0003] There are usually two conventional solutions to reduce the amount of air entering the furnace: 1. Install a furnace door at the entrance to lower the opening height and reduce the area of ​​the air entry channel; 2. Increase the carrier gas entering the furnace to form a slight positive pressure in the furnace to hinder air entry.

[0004] The above existing technical solutions still have oxidation problems and bring some problems. 1. The furnace door is usually installed in the form of a metal curtain, which will affect the placement of the workpiece. Once the workpiece is too high, it is easy to be squeezed and overflow. 2. Increasing the gas volume in the furnace will inevitably increase the cost of use. At the same time, the inlet opening is relatively large, and a large amount of intake is required to ensure a slight positive pressure, which greatly increases the cost. Therefore, it is necessary to develop a feeding port for a mesh belt furnace that reduces the oxidation of heat treatment products. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A feeding port of a mesh belt furnace for reducing oxidation of heat-treated products, comprising a mesh belt furnace body, the mesh belt furnace body comprising a mounting frame and a furnace body, the mounting frame being provided with a conveying device for conveying products;

[0008] A furnace body for processing products is installed on the mounting frame, the furnace body includes an inlet on one side and an outlet on the other side, the conveying device delivers products into the furnace body through the inlet, and a lifting door is provided on one side of the inlet;

[0009] A gas box, a gas box is arranged on the top of the inlet, an inner cavity of the gas box is arranged with inert gas, an outer wall of the gas box is arranged with an outlet pipe connected with the inner cavity of the gas box, the other end of the outlet pipe is connected with the air inlet end of the air outlet pump, the outlet end of the air outlet pump is connected with a main pipeline, at least two branch pipelines are arranged on the pipe body of the main pipeline, each of the branch pipelines is located on the top wall of the inner cavity of the inlet, and the bottom end of the branch pipeline is connected with an injection pipe, a plurality of the injection pipes are arranged side by side along the transport direction of the conveying device, and injection holes are evenly opened at the bottom of each of the injection pipes.

[0010] As a preferred solution for the feeding port of a mesh belt furnace for reducing oxidation of heat treatment products described in the utility model, the lifting door includes a storage frame fixed on the side of the entrance, a lifting door is arranged inside the storage frame, an electric cylinder is arranged on the top of the storage frame, and the output end of the electric cylinder slides through the top wall of the storage frame and is connected to the top wall of the furnace door.

[0011] As a preferred solution for the inlet of a mesh belt furnace for reducing oxidation of heat-treated products described in the utility model, the cross-sectional shape of the furnace door is consistent with the cross-sectional shape of the mounting frame and the conveying device.

[0012] As a preferred solution for the inlet of a mesh belt furnace for reducing oxidation of heat-treated products described in the utility model, the inert gas is nitrogen.

[0013] As a preferred solution for the inlet of a mesh belt furnace for reducing oxidation of heat-treated products described in the utility model, the length of the air injection pipe is equal to the width of the inside of the inlet.

[0014] As a preferred solution for the inlet of a mesh belt furnace for reducing oxidation of heat-treated products described in the utility model, a valve 1 is arranged on the pipe body of the main pipeline, and the valve 1 is located between the branch pipeline and the air outlet pump.

[0015] As a preferred solution for the inlet of a mesh belt furnace for reducing oxidation of heat-treated products described in the utility model, a second valve is provided on the pipe body of the branch pipe, and the second valve is located outside the inlet.

[0016] As a preferred solution for the inlet of a mesh belt furnace for reducing oxidation of heat-treated products described in the utility model, a barometer is provided on the top of the gas box, and the probe of the barometer is located in the inner cavity of the gas box.

[0017] As a preferred solution for the inlet of a mesh belt furnace for reducing oxidation of heat-treated products described in the utility model, wherein: an inflation pipe is connected to the top wall of the gas box, and a sealing plug is provided on the inflation pipe.

[0018] The beneficial effects of the utility model are as follows: the workpiece is swung on the conveying device, and after the conveying device is started, the workpiece is continuously driven into the furnace body, the lifting door of the entrance can adjust the entrance height, and at least two injection pipes are installed at the entrance. When feeding, valve one is opened and the air outlet pump is started, so that the inert gas inside the gas box is ejected through multiple injection holes to form an "air curtain", thereby better blocking the entry of air. Valve two can also be opened or closed according to needs to adjust the number of "air curtains". Since nitrogen is an inert gas, it will not cause oxidation to the workpiece, and only a small amount of gas is needed to form a barrier to prevent the entry of air. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure inside the cross section of the storage frame of the utility model;

[0022] Figure 3 For this utility model Figure 1 Schematic diagram of the structure of the middle A area;

[0023] Figure 4 This is a schematic diagram of the structure of the branch pipeline and its connecting parts of the utility model;

[0024] Figure 5 For this utility model Figure 4 Schematic diagram of the structure viewed from the side.

[0025] In the figure: a mounting frame 100, a conveying device 110, a furnace body 200, an inlet 210, a lifting door 220, a storage frame 230, an electric cylinder 240, a furnace door 250, a gas box 300, a main pipeline 310, an air outlet pump 312, a valve 1 313, a branch pipeline 320, a valve 2 321, an air injection pipe 330, an air injection hole 340, a barometer 350, and an air charging pipe 360. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1-Figure 5 , shows a schematic diagram of the structure of the inlet of a mesh belt furnace for reducing oxidation of heat-treated products according to the utility model, please refer to Figure 1-Figure 5 , a detailed introduction is given to the feeding port of a mesh belt furnace for reducing oxidation of heat treated products.

[0031] A feeding port of a mesh belt furnace for reducing oxidation of heat-treated products, comprising a mesh belt furnace body, the mesh belt furnace body comprising a mounting frame 100 and a furnace body 200, and a conveying device 110 for conveying products is installed on the mounting frame 100;

[0032] A furnace body 200 for processing products is installed on the mounting frame 100. The furnace body 200 includes an inlet 210 on one side and an outlet on the other side. The conveying device 110 passes through the inlet 210 to deliver products into the furnace body 200. A lifting door 220 is provided on one side of the inlet 210.

[0033] A gas box 300 is arranged on the top of the inlet 210, and an inner cavity of the gas box 300 is arranged with an inert gas. An outer wall of the gas box 300 is arranged with an outlet pipe connected to the inner cavity of the gas box 300, and the other end of the outlet pipe is connected to the air inlet end of the outlet pump 312. The outlet end of the outlet pump 312 is connected to the main pipeline 310. At least two branch pipelines 320 are connected to the pipe body of the main pipeline 310, and each branch pipeline 320 is located on the top wall of the inner cavity of the inlet 210, and the bottom end of the branch pipeline 320 is connected to a jet pipe 330. Multiple jet pipes 330 are arranged side by side along the transportation direction of the conveying device 110, and jet holes 340 are evenly opened at the bottom of each jet pipe 330. It can be seen that the gas box 300 is a device for storing nitrogen, which is not limited to that shown in the figure, and can also be external high-pressure nitrogen, without limitation.

[0034] Furthermore, the lifting door 220 includes a storage frame 230 fixed on the side of the entrance 210, and the lifting door 220 is arranged inside the storage frame 230. An electric cylinder 240 is arranged at the top of the storage frame 230. The output end of the electric cylinder 240 slides through the top wall of the storage frame 230 and is connected to the top wall of the furnace door 250. The cross-sectional shape of the furnace door 250 is consistent with the cross-sectional shape of the mounting frame 100 and the conveying device 110. The height of the furnace door 250 can be adjusted by the electric cylinder 240, thereby adjusting the opening degree of the entrance 210.

[0035] Furthermore, the inert gas is nitrogen. Since the inert gas itself has good stability, nitrogen will not cause oxidation to the product.

[0036] Furthermore, the length of the jet pipe 330 is equal to the width of the inside of the inlet 210, so that the "air curtain" generated by the inert gas jetting out can better block the air from entering.

[0037] Furthermore, a valve 313 is provided on the pipe body of the main pipe 310, and the valve 313 is located between the branch pipe 320 and the air outlet pump 312. When inert gas is needed, the valve 313 is opened and the air outlet pump 312 is started.

[0038] Furthermore, a second valve 321 is provided on the pipe body of the branch pipe 320 , and the second valve 321 is located outside the inlet 210 . The second valve 321 can be opened or closed as required to adjust the number of “air curtains”.

[0039] Furthermore, a barometer 350 is disposed on the top of the gas box 300 , and a probe of the barometer 350 is located in the inner cavity of the gas box 300 , and the air pressure inside the gas box 300 is checked through the barometer 350 .

[0040] Furthermore, a gas filling pipe 360 ​​is connected to the top wall of the gas box 300 , and a sealing plug is provided on the gas filling pipe 360 ​​, so that the inert gas can be added to the inside of the gas box 300 conveniently through the gas filling pipe 360 ​​.

[0041] In specific use, the workpiece is placed on the conveying device 110. After the conveying device 110 is started, the workpiece is continuously driven into the furnace body 200. The lifting door 220 of the entrance 210 can adjust the entrance height. At least two injection pipes 330 are installed at the entrance 210. When feeding, the valve 1 313 is opened and the air outlet pump 312 is started, so that the inert gas inside the gas box 300 is ejected through multiple injection holes 340 to form an "air curtain", thereby better blocking the entry of air. The valve 2 321 can also be opened or closed as needed to adjust the number of "air curtains". Since nitrogen is an inert gas, it will not cause oxidation to the workpiece, and only a small amount of gas is needed to form a barrier to prevent the entry of air.

[0042] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A feeding port of a mesh belt furnace for reducing oxidation of heat-treated products, characterized in that: The invention comprises a mesh belt furnace body, wherein the mesh belt furnace body comprises a mounting frame (100) and a furnace body (200), and a conveying device (110) for conveying products is installed on the mounting frame (100); A furnace body (200) for processing products is installed on the mounting frame (100), the furnace body (200) comprises an inlet (210) on one side and an outlet on the other side, the conveying device (110) passes through the inlet (210) to deliver products into the furnace body (200), and a lifting door (220) is provided on one side of the inlet (210); A gas box (300), wherein the gas box (300) is arranged on the top of the inlet (210), the inner cavity of the gas box (300) is arranged with inert gas, the outer wall of the gas box (300) is arranged with an outlet pipe connected to the inner cavity of the gas box (300), the other end of the outlet pipe is connected to the air inlet end of an outlet pump (312), the outlet end of the outlet pump (312) is connected to a main pipeline (310), at least two branch pipelines (320) are arranged on the pipe body of the main pipeline (310), each of the branch pipelines (320) is located on the top wall of the inner cavity of the inlet (210), and the bottom end of the branch pipeline (320) is arranged with an injection pipe (330), and the plurality of injection pipes (330) are arranged side by side along the transport direction of the conveying device (110), and each of the injection pipes (330) is evenly opened with injection holes (340) at the bottom.

2. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 1, characterized in that: The lifting door (220) comprises a storage frame (230) fixed on the side of the entrance (210), the lifting door (220) is arranged inside the storage frame (230) for lifting, an electric cylinder (240) is arranged at the top of the storage frame (230), and the output end of the electric cylinder (240) slides through the top wall of the storage frame (230) and is connected to the top wall of the furnace door (250).

3. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 2, characterized in that: The cross-sectional shape of the furnace door (250) is consistent with the cross-sectional shapes of the mounting frame (100) and the conveying device (110).

4. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 1, characterized in that: The inert gas is nitrogen.

5. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 1, characterized in that: The length of the air injection pipe (330) is equal to the width of the inside of the inlet (210).

6. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 1, characterized in that: A valve 1 (313) is provided on the pipe body of the main pipe (310), and the valve 1 (313) is located between the branch pipe (320) and the air outlet pump (312).

7. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 1, characterized in that: A second valve (321) is provided on the pipe body of the branch pipe (320), and the second valve (321) is located outside the inlet (210).

8. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 1, characterized in that: A barometer (350) is arranged on the top of the gas box (300), and a probe of the barometer (350) is located in the inner cavity of the gas box (300).

9. The inlet of the mesh belt furnace for reducing oxidation of heat-treated products according to claim 8, characterized in that: The top wall of the gas box (300) is connected to a gas filling pipe (360), and a sealing plug is provided on the gas filling pipe (360).

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