Iron-based part cleaning and heat treatment device

Abstract

The utility model discloses an iron-based part cleaning and heat treatment device which comprises a conveying mechanism, a cleaning chamber, a preheating chamber, a steam treatment chamber and a steam furnace. The conveying mechanism comprises a conveying net; the conveying net penetrates through the cleaning chamber, the preheating chamber and the steam treatment chamber; the steam furnace is communicated with the steam treatment chamber through a steam pipe; the steam pipe penetrates through the preheating chamber; the steam treatment chamber comprises a main reaction area and an auxiliary reaction area; a heat insulation plate is arranged between the main reaction area and the auxiliary reaction area; and the main reaction area and the auxiliary reaction area are respectively communicated with the steam furnace through steam pipes. The iron-based part cleaning and steam treatment device integrates cleaning and steam treatment functions, the iron-based part is cleaned before steam treatment, oil stains and powdered scraps on the iron-based part can be removed, iron oxidation reaction affecting steam treatment is avoided, meanwhile, the iron-based part is preheated before entering the steam treatment chamber, and the steam treatment effect is improved. The problem that in the prior art, the room temperature is suddenly reduced due to the fact that the iron-based parts enter the steam treatment chamber is solved, and the steam treatment effect of the iron-based parts is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of post-processing technology for iron-based parts, and in particular to a cleaning and heat treatment device for iron-based parts. Background Technology

[0002] Iron-based powder metallurgy parts contain a certain amount of porosity in their matrix. Steam treatment, as a post-processing technique for powder metallurgy materials, involves heating and oxidizing the iron-based powder metallurgy parts in superheated, supersaturated steam. This process generates a hard and dense layer of magnetite (Fe3O4) on the outer surface and the surface of the internal network of pores, which bonds firmly to the iron matrix. During steam treatment, Fe can generate three oxides under different temperatures and steam pressures: FeO, Fe3O4, and Fe2O3. The success of steam treatment depends on whether a continuous and dense Fe3O4 oxide film is formed on the surface during the steam reaction.

[0003] In addition, iron-based parts, after machining such as cutting and drilling, will have a small amount of oil and dust remaining, which inevitably affects the iron oxidation reaction in the pores. Some cutting fluid and oil residue remain on the surface or in localized areas of the parts, leaving traces after drying. During steam treatment, the oil film formed on the surface hinders the reaction between water vapor and Fe.

[0004] Existing steam treatment equipment only targets the steam treatment stage, using a material frame for static treatment within the furnace. This results in dead zones in the airflow, and the direct entry of iron-based parts into the steam treatment furnace causes a sudden drop in furnace temperature, leading to significant discrepancies between the designed process and the actual process.

[0005] Therefore, it is necessary to modify the existing steam treatment furnace to improve the steam treatment effect on iron-based parts. Summary of the Invention

[0006] The purpose of this invention is to provide a cleaning and heat treatment device for iron-based parts. It has a simple structure and strong practicality. Before steam treatment, it can remove residual oil and dust on iron-based parts to avoid affecting the iron oxidation reaction in the pores. After cleaning, it can preheat the iron-based parts and allow the cleaning liquid on them to evaporate. It solves the problem of sudden drop in room temperature caused by iron-based parts entering the steam treatment chamber in the prior art, and effectively improves the steam treatment effect of iron-based parts.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A cleaning and heat treatment apparatus for iron-based parts includes a conveying mechanism, a cleaning chamber, a preheating chamber, a steam treatment chamber, and a steam furnace. The conveying mechanism includes a conveyor net that passes through the cleaning chamber, the preheating chamber, and the steam treatment chamber. The steam furnace is connected to the steam treatment chamber via a steam pipe that passes through the preheating chamber. The steam treatment chamber includes a main reaction zone and an auxiliary reaction zone. A heat insulation plate is provided between the main reaction zone and the auxiliary reaction zone. The main reaction zone and the auxiliary reaction zone are respectively connected to the steam furnace via steam pipes.

[0009] In this invention, the conveying mechanism transports the iron-based parts to be processed sequentially through the cleaning chamber, preheating chamber, and steam treatment chamber. The cleaning chamber cleans the iron-based parts to remove oil film and dust, thus avoiding affecting the steam treatment effect. The steam furnace produces steam and sends it to the steam treatment chamber through steam pipes. The steam pipes have heat dissipation properties and pass through the preheating chamber, preheating the iron-based parts and evaporating any residual cleaning liquid after cleaning, preventing a sudden drop in temperature in the main reaction zone due to the iron-based parts entering the steam treatment chamber, which is beneficial for the oxidation and weight gain reaction. The steam treatment chamber treats the iron-based parts with steam, and the heat insulation plate divides the steam treatment chamber into a main reaction zone and an auxiliary reaction zone. As is common knowledge, the heat insulation plate does not affect the conveyor belt transporting the iron-based parts.

[0010] In this invention, the steam treatment chamber is designed with reference to existing steam treatment furnaces and is equipped with the basic components of a conventional steam treatment furnace, such as a steam inlet, a functional gas inlet, a temperature measuring element, a pressure measuring element, and a flow regulating valve. The functional gas can be an inert gas such as nitrogen. In this invention, the main reaction zone and the auxiliary reaction zone are connected to the steam furnace through steam pipes. In actual application, the amount of steam introduced into the main reaction zone and the auxiliary reaction zone can be adjusted as needed.

[0011] As is common knowledge, the conveying mechanism also includes rollers and a motor. In practical applications, the motor drives the rollers to rotate, thereby causing the conveyor network to rotate and realizing the transport of iron-based parts.

[0012] In practical applications, the steam treatment process is designed according to the required steam treatment parameters, such as the conveying speed of the conveyor network, the conveying method, and the time that iron-based parts stay in the steam treatment chamber, which does not affect the understanding of this utility model by those skilled in the art.

[0013] Preferably, the cleaning chamber, preheating chamber, and steam treatment chamber are independently configured. More preferably, an insulation pipe is provided between the preheating chamber and the steam treatment chamber. The iron-based parts to be treated are placed on a conveyor belt and pass through the cleaning chamber, preheating chamber, and steam treatment chamber in sequence to achieve cleaning and steam treatment operations on the iron-based parts; the insulation pipe is used to keep the preheated iron-based parts warm.

[0014] Furthermore, the cleaning chamber is equipped with a cleaning fluid spraying mechanism. The cleaning fluid spraying mechanism is conventional equipment, and conventional spray heads can be selected. The spray heads are used to spray conventional solvent oil, such as gasoline, onto the iron-based parts to remove the oil film and dust on the iron-based parts, so as to facilitate the next stage of steam treatment of the parts.

[0015] Preferably, the cleaning chamber is equipped with a cleaning fluid recovery mechanism. Located below the conveyor belt, the cleaning fluid recovery mechanism can be a conventional recovery tank used to recover the cleaning fluid sprayed during the cleaning process.

[0016] Preferably, in the preheating chamber, the steam pipe is located below the conveyor belt. Since hot air has a lower density and rises, placing the steam pipe below the conveyor belt is beneficial for preheating the iron-based parts and evaporating the cleaning fluid on them.

[0017] Preferably, the upper surface of the steam pipe in the preheating chamber is provided with a heat dissipation plate. The heat dissipation plate is a conventional device, and conventional fins can be selected to improve the heat dissipation efficiency of the steam pipe, thereby improving the efficiency of preheating the iron-based parts and evaporating the cleaning fluid on the iron-based parts.

[0018] Preferably, the preheating chamber is equipped with an exhaust gas venting mechanism. This exhaust gas venting mechanism is a conventional device, such as a standard fume hood, to remove the exhaust gas generated by the evaporation of cleaning fluid within the preheating chamber.

[0019] Preferably, the preheating chamber is provided with a functional gas inlet. The functional gas can be an inert gas such as nitrogen, which is introduced according to actual needs.

[0020] Preferably, the length ratio of the preheating chamber, the main reaction zone, and the auxiliary reaction zone is 1:(4-6):(4-6). More preferably, the length ratio of the preheating chamber, the main reaction zone, and the auxiliary reaction zone is 1:4:5. The essence of steam treatment is the oxidation reaction of iron in water to produce iron oxides and hydrogen. The water-to-hydrogen ratio affects the reaction products. Existing technologies mostly use a uniform steam volume for treatment, ignoring the phenomenon that the oxidation reaction of iron-based materials starts very quickly and then slows down, resulting in deviations in the oxidation effect. This invention distinguishes between the main reaction zone and the auxiliary reaction zone; independent steam introduction can provide a suitable water-to-hydrogen ratio. For example, less steam is introduced into the auxiliary reaction zone to prevent the formation of Fe2O3.

[0021] Preferably, the preheating chamber is equipped with a heating mechanism. The heating mechanism is a conventional device, and conventional heating tubes can be selected to further improve the efficiency of preheating iron-based parts and evaporating cleaning fluid.

[0022] Furthermore, the main reaction zone and the auxiliary reaction zone are each equipped with a heating mechanism. The heating mechanism is conventional equipment, and conventional heating tubes can be selected to maintain the required steam and provide sufficient environmental conditions for the iron oxidation reaction.

[0023] Due to the application of the above technical solutions, the iron-based parts cleaning and heat treatment device of this utility model has the following advantages: By setting up a cleaning chamber and a preheating chamber, this utility model can clean and preheat the iron-based parts before steam treatment, removing residual oil and dust from cutting and drilling, avoiding affecting the steam treatment effect, and solving the problem of the temperature of the main reaction zone dropping sharply when iron-based parts directly enter the steam treatment chamber in the prior art, effectively ensuring the steam treatment effect; By setting up a heat insulation plate, this utility model divides the steam treatment chamber into a main reaction zone and an auxiliary reaction zone, and sets up steam pipes to connect to the steam furnace respectively. In actual application, the temperature and steam flow rate of each zone can be designed according to needs, which is highly flexible and practical. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the iron-based parts cleaning and heat treatment device in Embodiment 1.

[0025] Figure 2 This is a schematic diagram of the installation structure of the heat sink in Embodiment 1.

[0026] Figure 3 This is a schematic diagram of the iron-based parts cleaning and heat treatment device in Embodiment 2.

[0027] The components include: 1. Conveying mechanism; 2. Cleaning chamber; 3. Preheating chamber; 4. Steam treatment chamber; 5. Steam furnace; 6. Steam pipe; 7. Insulation plate; 8. Cleaning liquid spraying mechanism; 9. Cleaning liquid recovery mechanism; 10. Heat dissipation plate; 11. Heating mechanism; 12. Exhaust gas discharge mechanism; 101. Conveying net; 102. Roller; 103. Motor; 401. Main reaction zone; 402. Auxiliary reaction zone. Detailed Implementation

[0028] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and preferred embodiments. All components in this utility model are existing products, and the specific connection methods and control methods are conventional technologies.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are merely for ease of description and should not be construed as limiting the invention. Example 1

[0030] like Figures 1 to 2 As shown:

[0031] A cleaning and heat treatment device for iron-based parts includes a conveying mechanism 1, a cleaning chamber 2, a preheating chamber 3, a steam treatment chamber 4, and a steam furnace 5; the cleaning chamber, preheating chamber, and steam treatment chamber are independently arranged. The steam furnace is connected to the steam treatment chamber via a steam pipe 6; the steam pipe passes through the preheating chamber; the steam treatment chamber includes a main reaction zone 401 and an auxiliary reaction zone 402; a heat insulation plate 7 is provided between the main reaction zone and the auxiliary reaction zone; the main reaction zone and the auxiliary reaction zone are respectively connected to the steam furnace via steam pipes. As is common knowledge, the heat insulation plate does not affect the conveyor belt transporting iron-based parts.

[0032] The conveying mechanism includes a conveyor belt 101, a roller 102, and a motor 103; the conveyor belt passes through the cleaning chamber, the preheating chamber, and the steam treatment chamber. In practical applications, the motor drives the roller to rotate, thereby driving the conveyor belt to rotate and realizing the conveying of iron-based parts.

[0033] The cleaning chamber is equipped with a cleaning fluid spraying mechanism 8 and a cleaning fluid recovery mechanism 9. The cleaning fluid spraying mechanism uses conventional spray heads, and the cleaning fluid recovery mechanism is a conventional recovery tank.

[0034] Inside the preheating chamber, the steam pipe is located below the conveyor belt; a heat dissipation plate 10 is provided on the upper surface of the steam pipe. The steam pipe in this invention has heat dissipation properties, and the heat dissipation plate uses conventional fins.

[0035] The length ratio of the preheating chamber, the main reaction zone, and the auxiliary reaction zone is 1:4:5.

[0036] The preheating chamber is equipped with a heating mechanism 11 and an exhaust gas mechanism 12. The main reaction zone and auxiliary reaction zone are each equipped with a heating mechanism. Conventional heating pipes are used for the heating mechanisms in the preheating chamber, main reaction zone, and auxiliary reaction zone; conventional fume hoods are used for the exhaust gas mechanism.

[0037] In this invention, the steam treatment chamber is designed with reference to existing steam treatment furnaces and is equipped with basic components for conventional steam treatment, such as a steam inlet, a functional gas inlet, a temperature measuring element, a pressure measuring element, and a flow regulating valve. The functional gas can be an inert gas such as nitrogen. In this invention, the main reaction zone and the auxiliary reaction zone are connected to the steam furnace through steam pipes. In actual application, the amount of steam introduced into the main reaction zone and the auxiliary reaction zone can be adjusted as needed.

[0038] The specific method of using the iron-based parts cleaning and heat treatment device of this utility model is as follows:

[0039] (1) Turn on the steam furnace and the heating pipes in the preheating chamber, main reaction zone and auxiliary reaction zone, and place the iron-based parts to be processed on the conveyor belt at the same time;

[0040] (2) Steam is introduced into the main reaction zone and the auxiliary reaction zone through steam pipes;

[0041] (3) The conveyor belt sequentially sends the iron-based parts into the cleaning chamber, preheating chamber and steam treatment chamber. In the cleaning chamber, the cleaning liquid spray head sprays gasoline to remove the oil film, powder and other substances on the iron-based parts. The preheating chamber uses the heat of the heating pipe and steam pipe to preheat the iron-based parts. The main reaction zone and auxiliary reaction zone steam treat the iron-based parts. The steam reacts with the iron to generate a hard and dense Fe3O4 oxide film on its outer surface and the surface of the internal mesh pores.

[0042] (4) After steam treatment is completed, the iron-based parts are sent out of the steam treatment chamber and naturally cooled to room temperature. Example 2

[0043] Based on Embodiment 1, the difference in this embodiment is that an insulation pipe 13 is provided between the preheating chamber and the steam treatment chamber to insulate the preheated iron-based parts. See [link to embodiment 1]. Figure 3 The rest are the same. Example 3

[0044] Based on Embodiment 1, the difference in this embodiment is that the heat sink is omitted, while the rest is the same. Example 4

[0045] Based on Embodiment 1, the difference in this embodiment is that the heating mechanism in the preheating chamber is omitted, while the rest is the same. Example 5

[0046] Based on Embodiment 1, the difference in this embodiment is that the preheating chamber is equipped with a functional gas inlet; otherwise, they are the same. The functional gas can be an inert gas such as nitrogen, and it is introduced according to actual needs.

[0047] The iron-based parts cleaning and heat treatment device disclosed in this utility model has a simple structure and strong practicality. By setting up a cleaning chamber and a preheating chamber, the iron-based parts can be cleaned and preheated before steam treatment to remove residual oil and dust from cutting and drilling, thus avoiding affecting the steam treatment effect. This solves the problem in the prior art where iron-based parts directly enter the steam treatment chamber, causing a sudden drop in the temperature of the main reaction zone, and effectively ensures the steam treatment effect. This utility model divides the steam treatment chamber into a main reaction zone and an auxiliary reaction zone by setting up a heat insulation plate, and sets up steam pipes to connect to the steam furnace respectively. In actual application, the temperature and steam flow rate of each zone can be designed according to needs, which is highly flexible.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. A cleaning and heat treatment apparatus for iron-based parts, characterized in that: The system includes a conveying mechanism, a cleaning chamber, a preheating chamber, a steam treatment chamber, and a steam furnace. The conveying mechanism includes a conveyor net that passes through the cleaning chamber, the preheating chamber, and the steam treatment chamber. The steam furnace is connected to the steam treatment chamber via a steam pipe that passes through the preheating chamber. The steam treatment chamber includes a main reaction zone and an auxiliary reaction zone. A heat insulation plate is provided between the main reaction zone and the auxiliary reaction zone. The main reaction zone and the auxiliary reaction zone are respectively connected to the steam furnace via steam pipes.

2. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: The cleaning chamber, preheating chamber, and steam treatment chamber are set up independently of each other.

3. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: The cleaning chamber is equipped with a cleaning fluid spraying mechanism.

4. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: The cleaning chamber is equipped with a cleaning fluid recovery mechanism.

5. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: Inside the preheating chamber, the steam pipe is located below the conveyor belt.

6. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: Inside the preheating chamber, a heat dissipation plate is provided on the upper surface of the steam pipe.

7. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: The preheating chamber is equipped with an exhaust gas venting mechanism.

8. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: The length ratio of the preheating chamber, the main reaction zone, and the auxiliary reaction zone is 1:(4-6):(4-6).

9. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: The preheating chamber is equipped with a heating mechanism.

10. The iron-based parts cleaning and heat treatment apparatus according to claim 1, characterized in that: The main reaction zone and the auxiliary reaction zone are each equipped with a heating mechanism.

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