Gas permeation uniformity optimizing device for carburizing furnace

Abstract

The utility model relates to the technical field of heat treatment equipment, in particular to a gas permeation uniformity optimizing device for a carburizing furnace, which comprises a furnace body, a plurality of groups of inner protection backing rings arranged along the vertical direction are fixedly mounted on the inner wall of the furnace body, each group of inner protection backing rings comprises two inner protection backing rings, and the inner protection backing rings are annular. An annular gas pipe is arranged between the two inner protection backing rings in each set, an upper set of gas outlet holes and a lower set of gas outlet holes which are symmetrical to each other are formed in the inner annular side face of each annular gas pipe, branch pipes penetrating out of the furnace body are fixedly installed on the side faces of the annular gas pipes, and main gas pipes are fixedly installed on the multiple branch pipes. A plurality of temperature control electric heaters are fixedly installed in the furnace body, a plugging cover is arranged on the top of the furnace body, and the plugging cover is driven by a left air cylinder and a right air cylinder to be opened and closed. The carburizing device has a better carburizing effect, avoids dead angles, and remarkably improves the carburizing uniformity.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment equipment technology, and more specifically, to a device for optimizing the uniformity of gas permeation in a carburizing furnace. Background Technology

[0002] Carburizing is a common heat treatment process for metal surfaces. It involves infiltrating carburizing gas into the surface of a metal workpiece at high temperatures, thereby improving the surface hardness, wear resistance, and fatigue strength. During the carburizing process, the uniformity of carburizing gas penetration in the carburizing furnace directly affects the quality of the carburized layer on the workpiece surface.

[0003] Patent CN109252132A discloses an industrial carburizing furnace, comprising a motor, a working chamber, a working chamber door, and a controller. The motor is located in the middle of the top of the working chamber, with its output end penetrating the top of the working chamber and extending into the working chamber. A first rotating rod is fixed to the portion of the motor output end inside the working chamber, and a rigid rope is wound around the portion of the motor output end outside the working chamber. A pulley is provided on the outside of the working chamber. A second rotating rod is provided at the bottom of the working chamber, penetrating the bottom of the working chamber and extending into the interior of the working chamber. The rigid rope on the motor output end extends to the second rotating rod through the pulley and is wound around the second rotating rod. The working chamber also includes a heating cylinder, a venting mesh cylinder, and a venting unit. This invention has an ingenious structure and novel design, improving the efficiency of carburizing treatment of steel parts.

[0004] Although this technical solution has advantages such as novel design and improved efficiency in carburizing steel parts, most current carburizing furnaces still have some shortcomings in gas permeation. For example, traditional carburizing furnaces have simple gas inlet structures, using only a single inlet pipe. After the gas enters the furnace, it is easy to form local eddies or dead zones, resulting in excessively high gas concentrations in some areas and insufficient gas concentrations in others. This leads to uneven thickness and hardness of the carburized layer on the workpiece surface. With the increasing demands for quality in industrial production of metal parts, developing a device that can effectively optimize the uniformity of gas permeation in a carburizing furnace is of significant practical importance. Utility Model Content

[0005] The purpose of this invention is to provide a device for optimizing the uniformity of gas permeation in a carburizing furnace, so as to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A gas permeation uniformity optimization device for a carburizing furnace includes a furnace body. Multiple sets of vertically arranged inner protective rings are fixedly installed on the inner wall of the furnace body. Each set contains two inner protective rings, which are annular. An annular gas pipe is provided between the two inner protective rings in each set. The annular gas pipe has two symmetrical sets of air outlets on its inner annular side. Branch pipes extending out of the furnace body are fixedly installed on the side of the annular gas pipe. Main gas pipes are fixedly installed on multiple branch pipes. Multiple temperature-controlled electric heaters are fixedly installed inside the furnace body. A sealing cover is provided on the top of the furnace body, and the sealing cover is opened and closed by two cylinders.

[0008] Preferably, the lower projection of the annular air tube is located inside the lower projection of the inner protective pad ring, and the temperature-controlled electric heater is located below the corresponding inner protective pad ring.

[0009] Preferably, the upper set of air outlets is inclined upward at 30° to 60°, and the lower set of air outlets is inclined downward at 15° to 45°.

[0010] This setting allows for more even gas distribution and improves subsequent gas permeation.

[0011] Preferably, a crossbeam is provided above the furnace body, the crossbeam is fixedly installed on the external frame, and the cylinder is fixedly installed on the crossbeam.

[0012] Preferably, a bolt plate is fixedly installed at the end of the telescopic shaft of the cylinder, and the sealing cover is detachably installed on the bottom surface of the bolt plate.

[0013] Preferably, a drain pipe is fixedly installed at the bottom of the furnace body, and a valve is fixedly installed on the drain pipe;

[0014] This setting allows for timely drainage during subsequent cleaning operations inside the furnace.

[0015] Preferably, the bottom of the furnace body is fixedly installed with multiple support legs, and the inner protective pad ring is provided with a flow guiding slope on its side. In each group, the flow guiding slope on the upper inner protective pad ring is set to be inclined downward at 30°~60°, and the flow guiding slope on the lower inner protective pad ring in each group is set to be inclined upward at 30°~60°.

[0016] This setting allows for a more uniform airflow distribution, which helps improve the carburizing effect.

[0017] Preferably, an upper sealing ring is fixedly installed on the top cylinder of the furnace body, and a sealing ring is embedded in the upper surface of the upper sealing ring. The sealing cover abuts against the upper surface of the upper sealing ring for sealing operation.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model, through the setting of a gas distribution structure consisting of multiple sets of annular gas pipes, gas outlets, branch pipes and main gas pipes, combined with the design of inner protective gaskets and guide slopes, realizes that carburizing gas is uniformly sprayed out from different heights and directions of the furnace body at multiple angles. The guide slopes guide the airflow diffusion. Compared with the traditional single gas inlet pipe, it avoids the formation of local eddies or dead zones in the gas after entering the furnace, creating a good gas environment for uniform carburizing of the workpiece surface.

[0020] 2. This invention improves the uniformity of gas distribution within the furnace by arranging one set of upper gas outlets at an upward angle of 30°~60° and the other set of lower gas outlets at a downward angle of 15°~45°. This creates a staggered and wide-coverage airflow field within the furnace. Simultaneously, the temperature-controlled electric heater ensures stable furnace temperature, guaranteeing that the carburizing gas reacts fully with the workpiece at a suitable temperature while maintaining a uniform distribution, significantly enhancing the uniformity of carburized layer thickness and hardness.

[0021] 3. This utility model uses a cylinder to drive the sealing cover to open and close the furnace body. Combined with the sealing design of the upper sealing ring and sealing ring, it not only facilitates the loading and unloading of workpieces, but also ensures the sealing of the furnace body, preventing gas leakage from affecting the carburizing effect. The setting of the drain pipe and valve facilitates the cleaning and drainage of the furnace body, maintaining the cleanliness of the furnace and ensuring the stability of the carburizing process. The support legs provide stable support for the furnace body. The coordinated action of all structures improves the convenience, stability and reliability of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a partial structural schematic diagram of the present invention;

[0024] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is a schematic diagram of the structure of the annular trachea of ​​this utility model;

[0026] The meanings of the labels in the diagram are as follows:

[0027] 1. Furnace body; 10. Drain pipe; 11. Valve; 12. Support leg; 13. Temperature-controlled electric heater; 14. Inner protective gasket ring; 141. Drainage slope; 15. Upper sealing ring; 151. Sealing ring;

[0028] 2. Main gas pipe; 20. Branch pipe; 21. Annular gas pipe; 211. Gas outlet;

[0029] 3. Crossbeam plate; 30. Cylinder; 31. Bolt plate; 32. Sealing cover. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-4 This utility model provides a technical solution: a gas permeation uniformity optimization device for a carburizing furnace, comprising a furnace body 1. Multiple sets of vertically arranged inner protective rings 14 are fixedly installed on the inner wall of the furnace body 1. Each set contains two inner protective rings 14, which are annular. An annular gas pipe 21 is provided between the two inner protective rings 14 in each set. Two sets of symmetrically arranged air outlets 211 are provided on the inner annular side of the annular gas pipe 21. Branch pipes 20 extending out of the furnace body 1 are fixedly installed on the side of the annular gas pipe 21. Main gas pipes 2 are fixedly installed on multiple branch pipes 20, allowing carburizing gas to enter the annular gas pipe 21 through the main gas pipe 2 and branch pipes 20, and then be ejected through the two sets of air outlets 211. The multiple sets of annular gas pipes 21 are distributed vertically along the furnace body 1. Compared to a traditional single inlet pipe, this achieves uniform gas distribution at different heights within the furnace body 1, effectively avoiding the problem of uneven local gas concentration and ensuring uniform carburizing.

[0032] In this embodiment, multiple temperature-controlled electric heaters 13 are fixedly installed inside the furnace body 1, and a sealing cover 32 is provided on the top of the furnace body 1. The sealing cover 32 is opened and closed by two cylinders 30 on the left and right sides, so as to ensure that the temperature-controlled electric heaters 13 can be used for heating during use, and the sealing cover 32 can achieve the sealing effect.

[0033] like Figure 2 As shown, the lower projection of the annular air pipe 21 is located inside the lower projection of the inner protective pad ring 14, and the temperature-controlled electric heater 13 is located below the corresponding inner protective pad ring 14, so that the annular air pipe 21 is protected by the inner protective pad ring 14, reducing the damage to the workpiece caused by collision when it is placed in.

[0034] like Figure 4As shown, the upper set of air outlets 211 are inclined upwards at 30°~60°, and the lower set of air outlets 211 are inclined downwards at 15°~45°. This causes the gas to form an alternating airflow inside the furnace body 1 after it is ejected, which expands the gas diffusion range, enhances the gas mixing effect, effectively avoids dead zones in the airflow, and makes the gas distribution inside the furnace body 1 more uniform, significantly improving the uniformity of carburizing gas penetration into the workpiece.

[0035] like Figure 1 As shown, a crossbeam plate 3 is installed above the furnace body 1, and the crossbeam plate 3 is fixedly installed on the external frame. A cylinder 30 is fixedly installed on the crossbeam plate 3. A bolt plate 31 is fixedly installed at the end of the telescopic shaft of the cylinder 30. A sealing cover 32 is detachably installed on the bottom surface of the bolt plate 31 by multiple fastening bolts, thus fixing the crossbeam plate 3 to the external frame and providing stable support for the cylinder 30. The telescopic shaft of the cylinder 30 drives the bolt plate 31 and the sealing cover 32 to open and close the top of the furnace body 1. Compared with traditional opening and closing methods, this structure is more convenient to operate, has a higher degree of automation, facilitates the loading and unloading of workpieces, and ensures the sealing of the furnace body 1.

[0036] like Figure 2 As shown, a drain pipe 10 is fixedly installed at the bottom of the furnace body 1, and a valve 11 is fixedly installed on the drain pipe 10. When cleaning and maintaining the furnace body 1, the valve 11 can be opened to discharge impurities and waste liquids inside the furnace through the drain pipe 10, which can conveniently and quickly complete the draining operation, keep the inside of the furnace body 1 clean, ensure the stable operation of the carburizing process, and extend the service life of the equipment.

[0037] like Figure 2 As shown, multiple support legs 12 are fixedly installed at the bottom of the furnace body 1, providing stable support for the furnace body 1. A flow-guiding slope 141 is provided on the side of the inner protective ring 14. In each group, the flow-guiding slope 141 on the upper inner protective ring 14 is inclined downwards at 30°~60°, while the flow-guiding slope 141 on the lower inner protective ring 14 is inclined upwards at 30°~60°. The flow-guiding slope 141 guides the gas ejected from the gas outlet 211, changes the airflow direction, promotes gas diffusion, makes the airflow more evenly distributed within the furnace body 1, reduces gas flow resistance, enhances the contact effect between the gas and the workpiece, and further improves the carburizing quality.

[0038] It is worth noting that an upper sealing ring 15 is fixedly installed on the top cylinder of the furnace body 1. A sealing ring 151 is embedded in the upper surface of the upper sealing ring 15. The sealing cover 32 is pressed against the upper surface of the upper sealing ring 15 for sealing operation. When the sealing cover 32 is pressed against the upper sealing ring 15, the sealing ring 151 plays a sealing role, effectively preventing the leakage of carburizing gas, ensuring the stability of gas pressure and concentration inside the furnace body 1, providing a good sealing environment for the carburizing process, and avoiding poor carburizing effect and safety hazards caused by gas leakage.

[0039] Finally, it should be noted that the temperature-controlled electric heater 13, cylinder 30, corresponding control system, and external power supply involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adapted controllers and power supplies, are connected by wires. The specific connection method should refer to the working principle in this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0040] When using the gas permeation uniformity optimization device for carburizing furnace of this utility model, the bolt plate 31 and the sealing cover 32 are raised by the telescopic shaft of the cylinder 30 to open the top of the furnace body 1, and the workpiece to be carburized is placed into the furnace body 1. Then, the cylinder 30 is operated to lower the sealing cover 32 and press it against the upper sealing ring 15, and the furnace body 1 is sealed by the sealing ring 151.

[0041] Next, according to the requirements of the carburizing process, the temperature-controlled electric heater 13 is activated to heat the interior of the furnace body 1. At the same time, the carburizing gas enters the annular gas pipe 21 through the main gas pipe 2 and the branch pipe 20, and is ejected through the upper and lower sets of inclined gas outlets 211, forming an interlaced airflow inside the furnace body 1. The guide slope 141 on the inner protective gasket ring 14 further guides the airflow diffusion, so that the gas is evenly distributed at different height levels of the furnace body 1, realizing the heated carburizing operation.

[0042] After carburizing is completed, the sealing cover 32 is opened again through cylinder 30 to remove the processed workpiece. If the furnace body 1 needs to be cleaned, the valve 11 on the drain pipe 10 is opened and cleaning and other operations are performed.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A gas permeation uniformity optimization device for a carburizing furnace, comprising a furnace body (1), characterized in that: Multiple sets of inner protective pads (14) arranged vertically are fixedly installed on the inner wall of the furnace body (1). Each set of inner protective pads (14) consists of two inner protective pads (14). The inner protective pads (14) are annular. An annular gas pipe (21) is provided between the two inner protective pads (14) in each set. The inner annular side of the annular gas pipe (21) is provided with two sets of symmetrical gas outlets (211). A branch pipe (20) that passes through the furnace body (1) is fixedly installed on the side of the annular gas pipe (21). A main gas pipe (2) is fixedly installed on multiple branch pipes (20). Multiple temperature-controlled electric heaters (13) are fixedly installed inside the furnace body (1). A sealing cover (32) is provided on the top of the furnace body (1). The sealing cover (32) is opened and closed by two cylinders (30) on the left and right.

2. The gas permeation uniformity optimization device for a carburizing furnace according to claim 1, characterized in that: The lower projection of the annular air tube (21) is located inside the lower projection of the inner protective pad ring (14), and the temperature-controlled electric heater (13) is located below the corresponding inner protective pad ring (14).

3. The gas permeation uniformity optimization device for a carburizing furnace according to claim 1, characterized in that: The upper set of air outlets (211) are inclined upward at 30°~60°, and the lower set of air outlets (211) are inclined downward at 15°~45°.

4. The gas permeation uniformity optimization device for a carburizing furnace according to claim 1, characterized in that: A crossbeam plate (3) is provided above the furnace body (1). The crossbeam plate (3) is fixedly installed on the external frame, and the cylinder (30) is fixedly installed on the crossbeam plate (3).

5. The gas permeation uniformity optimization device for a carburizing furnace according to claim 1, characterized in that: A bolt plate (31) is fixedly installed at the end of the telescopic shaft of the cylinder (30), and the sealing cover (32) is detachably installed on the bottom surface of the bolt plate (31).

6. The gas permeation uniformity optimization device for a carburizing furnace according to claim 1, characterized in that: A drain pipe (10) is fixedly installed at the bottom of the furnace body (1), and a valve (11) is fixedly installed on the drain pipe (10).

7. The gas permeation uniformity optimization device for a carburizing furnace according to claim 1, characterized in that: The bottom of the furnace body (1) is fixedly equipped with multiple support legs (12), and the inner protective pad ring (14) is provided with a flow-guiding slope (141) on its side. The flow-guiding slope (141) on the upper inner protective pad ring (14) in each group is inclined downward at 30°~60°, and the flow-guiding slope (141) on the lower inner protective pad ring (14) in each group is inclined upward at 30°~60°.

8. The gas permeation uniformity optimization device for a carburizing furnace according to claim 1, characterized in that: An upper sealing ring (15) is fixedly installed on the top cylinder of the furnace body (1). A sealing ring (151) is embedded in the upper surface of the upper sealing ring (15). The sealing cover (32) abuts against the upper surface of the upper sealing ring (15) for sealing operation.

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