Oxidizing Atmosphere Isolation Chamber and Bright Solution Furnace for Steel

Abstract

This utility model discloses an oxidizing atmosphere isolation box and a bright solution treatment furnace for steel, which effectively isolates the oxidizing atmosphere. The oxidizing atmosphere isolation box is suitable for bright solution treatment furnaces for steel, which include at least a gas exchange section, a heating section, a rapid cooling section, and a slow cooling section. The oxidizing atmosphere isolation box is installed in the gas exchange section and / or the slow cooling section. The oxidizing atmosphere isolation box includes a box body, a driver, a driving component, and a mounting base. The box body has a sealed cavity with a bottom opening. The driver is installed in the box body, and the driving component is located in the sealed cavity. The driving component is connected to the output end of the driver. The driver drives the driving component to move up and down in the sealed cavity. The mounting base is installed at the lower end of the driving component and extends downward beyond the opening end of the sealed cavity. The mounting base is loaded with a sealing component for bonding with the steel. The driver drives the driving component to move up and down, which in turn drives the mounting base to move up and down synchronously, so that the sealing component is tightly bonded to the steel flowing into the gas exchange section and / or the slow cooling section.

Description

Technical Field

[0001] This utility model relates to the field of metal heat treatment, and in particular to an oxidizing atmosphere isolation chamber and a bright solution furnace for steel. Background Technology

[0002] During the heat treatment of stainless steel pipes, a protective atmosphere is typically introduced into the heat treatment furnace to ensure the surface brightness and solution treatment of the stainless steel pipes. The stainless steel pipes are in motion during the heat treatment process, and ambient air is drawn into the solution treatment furnace along with the pipes. Oxygen from the air diffuses into the steel, while carbon within the steel diffuses outwards. This diffusion results in a decarburized layer on the surface of the stainless steel pipe with low carbon content. It can be seen that controlling decarburization hinges on controlling the oxidizing atmosphere within the furnace and reducing the amount of air entering the solution treatment furnace with the stainless steel pipes. Simultaneously, the process atmosphere needs to be isolated between different sections of the solution treatment furnace. Existing technologies use seals that contact the stainless steel pipes to prevent outside air from entering the solution treatment furnace. However, long-term contact between the moving stainless steel pipes and the seals wears down, creating gaps that allow outside air to enter the furnace. Furthermore, the working atmospheres in different sections of the solution treatment furnace can influence each other, ultimately affecting the product quality of the stainless steel pipes. Therefore, there is an urgent need for an isolation chamber and a bright solution treatment furnace that effectively isolates the oxidizing atmosphere to overcome these shortcomings. Utility Model Content

[0003] The primary objective of this invention is to provide an isolation box that effectively isolates oxidizing atmospheres.

[0004] The second objective of this invention is to provide a bright solution treatment furnace for steel, which has an isolation box that ensures effective isolation from oxidizing atmospheres.

[0005] To achieve the above objectives, the oxidizing atmosphere isolation box provided by this utility model is suitable for bright solution treatment furnaces for steel. The bright solution treatment furnace for steel includes at least a gas exchange section, a heating section, a rapid cooling section, and a slow cooling section. The oxidizing atmosphere isolation box is installed in the gas exchange section and / or the slow cooling section. The oxidizing atmosphere isolation box includes a box body, a driver, a driving component, and a mounting base. The box body has a sealed cavity with a bottom opening. The driver is installed in the box body, and the driving component is located in the sealed cavity. The driving component is connected to the output end of the driver. The driver drives the driving component to move up and down within the sealed cavity. The mounting base is installed at the lower end of the driving component, extending downwards beyond the opening end of the sealed cavity. The mounting base is fitted with a sealing component for bonding with the steel. The driver drives the driving component to move up and down, causing the mounting base to move up and down synchronously, so that the sealing component tightly adheres to the steel flowing into the gas exchange section and / or the slow cooling section.

[0006] Preferably, the upper end of the drive component extends upward through the top of the housing, and the upper end of the drive component is isolated from the external environment.

[0007] Preferably, the oxidizing atmosphere isolation chamber of this utility model further includes a protective sleeve installed above the chamber body and covering the upper end of the drive component, wherein the upper end of the drive component is isolated from the external environment by means of the protective sleeve.

[0008] Preferably, the oxidizing atmosphere isolation chamber of this utility model further includes a transmission device and a fixed base installed on the top of the chamber. The protective sleeve is installed on the fixed base, and the fixed base has a receiving cavity. The driving component also passes through the receiving cavity. The transmission device is installed in the receiving cavity and is connected to the output end of the driver. The driver drives the driving component to perform vertical linear motion by driving the transmission device.

[0009] Preferably, the transmission device includes a transmission gear rotatably mounted in the accommodating cavity, a driving member is a straight rod, and a rack arranged in the vertical direction is provided on one side of the driving member. The meshing transmission between the transmission gear and the rack drives the driving member to perform vertical linear motion.

[0010] Preferably, the transmission device further includes a guide wheel installed in the accommodating cavity to keep the drive member upright. The guide wheel is offset to one side of the transmission gear, and a motion channel is formed between the guide wheel and the transmission gear. The drive member passes through the motion channel, and the guide wheel is in rolling connection with the other side of the drive member relative to the rack.

[0011] Preferably, the transmission device includes two guide wheels that are positioned opposite each other, one above the other, and the seal is a flexible, suspended square sheet structure.

[0012] Preferably, the transmission device includes two sets of fixed seats arranged at left and right intervals and two sets of transmission devices. The transmission gears of the two sets of transmission devices are arranged coaxially and connected by a transmission shaft. The transmission shaft is installed at the output end of the driver. The driver drives the two transmission gears to rotate synchronously by driving the transmission shaft to rotate.

[0013] Preferably, a flange structure is formed at the bottom of the housing.

[0014] To achieve the second objective mentioned above, this utility model also provides a bright solution treatment furnace for steel, which includes at least an air exchange section, a heating section, a rapid cooling section and a slow cooling section, wherein the air exchange section and / or the slow cooling section are equipped with the aforementioned oxidizing atmosphere isolation box.

[0015] Compared with existing technologies, the oxidizing atmosphere isolation chamber of this utility model includes a chamber body, a driver, a driving component, and a mounting base. The chamber body has a sealed cavity with a bottom opening. The driver is installed in the chamber body, and the driving component is located in the sealed cavity. The driving component is connected to the output end of the driver. The driver drives the driving component to move up and down within the sealed cavity. The mounting base is installed at the lower end of the driving component, extending downwards beyond the opening end of the sealed cavity. The mounting base is used to hold a sealing component for contact with the steel. The driver drives the driving component to move up and down, which in turn drives the mounting base to move up and down synchronously, ensuring that the sealing component is tightly against the steel flowing into the ventilation section and / or slow cooling section. During installation, the chamber body is installed on the ventilation section and slow cooling section to install the oxidizing atmosphere isolation chamber. When the above-mentioned bright solution treatment furnace for steel is running, stainless steel pipes are continuously fed into the ventilation section and slow cooling section. During the transport of the steel pipes, the sealing component continuously contacts the stainless steel pipes, preventing external oxidizing atmosphere from entering the heating section, ensuring the isolation of the oxidizing atmosphere within the bright solution treatment furnace for steel, thereby ensuring the quality of the stainless steel pipes after heat treatment. When the stainless steel tube and the seal wear out due to long-term contact, the driver drives the drive component to move downward, which in turn moves the mounting base downward, keeping the seal in close contact with the stainless steel tube. This ensures the isolation effect against the oxidizing atmosphere and prevents or reduces the entry of the oxidizing atmosphere into the heating section, thus affecting the bright solution treatment effect of the stainless steel tube. Attached Figure Description

[0016] Figure 1 This is a perspective view of the oxidizing atmosphere isolation box of this utility model when it is installed in the slow cooling section.

[0017] Figure 2 This is a front view of the oxidizing atmosphere isolation chamber of this utility model when it is installed in the slow cooling section.

[0018] Figure 3 This is a perspective view of the oxidizing atmosphere isolation chamber of this utility model.

[0019] Figure 4 This is a left view of the oxidizing atmosphere isolation chamber of this utility model.

[0020] Figure 5 The oxidizing atmosphere isolation chamber of this utility model Figure 4 The sectional view obtained after cutting along line segment AA.

[0021] Figure 6 This is a perspective view of the oxidizing atmosphere isolation chamber of this utility model after it has been separated from the chamber body.

[0022] Figure 7 This is a three-dimensional schematic diagram of the oxidizing atmosphere isolation box of this utility model installed in the gas exchange section and slow cooling section of a bright solution furnace for steel. Detailed Implementation

[0023] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] like Figure 7 As shown, this utility model discloses a bright solution treatment furnace 100 for steel. In the embodiments provided by this utility model, the steel is stainless steel pipe, but it should be understood that it is not limited to stainless steel pipe, and can be steel plate, steel bar, etc., depending on actual needs. The bright solution treatment furnace 100 for steel includes at least a gas exchange section 10, a heating section 20, a rapid cooling section 30, and a slow cooling section 40. This utility model isolates the oxidizing atmosphere by installing an oxidizing atmosphere isolation box 50 on both the rapid cooling section 30 and the slow cooling section 40, preventing the oxidizing atmosphere from entering the heating section 20 and avoiding "decarburization" on the surface of the steel pipe. However, depending on actual production needs, an oxidizing atmosphere isolation box can also be installed only on the rapid cooling section 30 or the slow cooling section 40. In addition, the bright solution treatment furnace 100 for steel also includes a feeding section 60 located on one side of the gas exchange section 10 and a discharging section 70 located on one side of the slow cooling section 40.

[0025] Solution treatment refers to a heat treatment process in which an alloy is heated to a high-temperature single-phase region and held at that temperature, allowing the excess phase to fully dissolve into the solid solution, followed by rapid cooling to obtain a supersaturated solid solution. Specifically in the field of stainless steel, taking austenitic stainless steel as an example, the solution treatment process typically involves heating the austenitic stainless steel to approximately 950-1150°C, causing all or most of the carbide phase to dissolve, with carbon dissolved in the austenite. Then, rapid cooling is performed to achieve a supersaturated state of the carbon. Once the carbon is stabilized, it has no ability or opportunity to form high-chromium carbides with chromium, thus strengthening the solid solution, improving toughness and corrosion resistance, eliminating stress and softening, and facilitating further processing or shaping. This heat treatment method is called solution heat treatment.

[0026] In the field of stainless steel, the influence of carbon is mainly reflected in two aspects. On the one hand, it is an element that stabilizes austenite and plays a significant role, equivalent to 30 times that of nickel. On the other hand, due to the strong affinity between carbon and chromium, carbon and chromium can form a series of complex carbides. During the solution treatment process, special attention should be paid to decarburization and carbon addition.

[0027] "Decarburization" mainly refers to the process during solution heat treatment of stainless steel, where carbon atoms on the surface of the steel pipe gain enough energy to escape from the pipe surface into the furnace, passively reducing the carbon content of the material and resulting in lower and uneven hardness. Decarburization is the reaction of carbon with the oxidizing atmosphere in the furnace, causing surface decarburization. It is a diffusion process; oxygen in the furnace gas diffuses into the steel, while carbon diffuses outward. This diffusion results in a low-carbon, decarburized layer on the surface of the steel. Therefore, controlling the occurrence of decarburization hinges on controlling the oxidizing atmosphere within the furnace. Oxidizing atmospheres cause decarburization, with water (H2O) being the most effective decarburizing medium, followed by oxygen (O2).

[0028] like Figures 1 to 6 As shown, the oxidizing atmosphere isolation chamber 50 of this utility model includes a chamber body 51, a driver 52, a driving component 53, and a mounting base 54. The chamber body 51 has a sealed cavity 511 with a bottom opening. The driver 52 is mounted on the chamber body 51, and the driving component 53 is located in the sealed cavity 511. The driving component 53 is connected to the output end of the driver 52. The driver 52 drives the driving component 53 to move up and down within the sealed cavity 511. The mounting base 54 is mounted on the lower end of the driving component 53, extending downwards beyond the opening end of the sealed cavity 511. The mounting base 54 is used to load a sealing component 541 that is pressed tightly against steel (in this utility model, stainless steel pipe, but it should be understood that it is not limited to this). The driver 52 drives the driving component 53 to move up and down, causing the mounting base 54 to move up and down synchronously, so that the sealing component 541 presses tightly against the steel flowing into the ventilation section 10 and / or the slow cooling section 40. During installation, the enclosure 51 is mounted on the ventilation section 10 and the slow cooling section 40 to complete the installation of the oxidizing atmosphere isolation enclosure 50.

[0029] During operation of the aforementioned bright solution treatment furnace 100, stainless steel pipes are continuously fed into the ventilation section 10 and the slow cooling section 40. As the steel pipes are transported, the sealing element 541 remains tightly pressed against the stainless steel pipe, preventing external oxidizing atmospheres from entering the heating section 20. This ensures the isolation of the oxidizing atmosphere within the bright solution treatment furnace 100, thereby guaranteeing the quality of the stainless steel pipe heat treatment. When the stainless steel pipe wears down due to prolonged contact with the sealing element 541, the driver 52 drives the driver 53 downwards, causing the mounting base 54 to move downwards, maintaining tight contact between the sealing element 541 and the stainless steel pipe, thus ensuring the isolation effect against the oxidizing atmosphere.

[0030] Preferably, the seal 541 can be made of cloth, such as fiber cloth, but it can also be made of soft rubber. The seal 541 can be installed on the mounting base 54 by clamping, snapping, locking, or other methods. Preferably, the mounting base 54 is a plate-shaped piece with three slots at its bottom. The seal 541 can be inserted into the slots and fixed with screws. The three seals 541 are arranged sequentially and spaced apart along the material conveying direction, which is equivalent to setting up multiple layers of seals 541, improving the isolation effect against oxidizing atmospheres.

[0031] like Figures 1 to 6 As shown, the upper end of the drive component 53 extends upward through the top of the housing 51. The upper end of the drive component 53 is isolated from the external environment, thus achieving an isolation effect and preventing the entry of oxidizing atmosphere. Specifically, the oxidizing atmosphere isolation chamber 50 of this invention also includes a protective sleeve 55 installed above the housing 51 and covering the upper end of the drive component 53. The upper end of the drive component 53 is isolated from the external environment by means of the protective sleeve 55. Preferably, the protective sleeve 55 can be a round tube or a square tube.

[0032] like Figures 1 to 6 As shown, the oxidizing atmosphere isolation chamber 50 of this utility model also includes a transmission device 56 and a fixed base 57 installed on the top of the chamber body 51. A protective sleeve 55 is installed on the fixed base 57, which has a receiving cavity 571. The driving member 53 also passes through the receiving cavity 571. The transmission device 56 is installed in the receiving cavity 571 and is connected to the output end of the driver 52. The driver 52 drives the driving member 53 to perform vertical linear motion by driving the transmission device 56. Placing the transmission device 56 in the receiving cavity 571 isolates the transmission device 56 from the external environment, preventing leakage and ensuring the isolation effect against the oxidizing atmosphere. Furthermore, the fact that the driving member 53 passes through the receiving cavity 571 ensures isolation from the oxidizing atmosphere without affecting its own vertical movement.

[0033] Specifically, the transmission device 56 includes a transmission gear 561 rotatably mounted in the accommodating cavity 571, the driving member 53 is a straight rod, and a rack 531 arranged in the vertical direction is provided on one side of the driving member 53. The meshing transmission between the transmission gear 561 and the rack 531 drives the driving member 53 to perform vertical linear motion.

[0034] Furthermore, the transmission device 56 also includes a guide wheel 562 installed in the accommodating cavity 571 to keep the driving member 53 upright. The guide wheel 562 is offset to one side of the transmission gear 561, and a movement channel is formed between the guide wheel 562 and the transmission gear 561. The driving member 53 passes through the movement channel, and the guide wheel 562 is in rolling connection with the other side of the driving member 53 opposite to the rack 531. The guide wheel 562 guides the lifting and lowering of the driving member 53, preventing the driving member 53 from tilting. Moreover, the rolling connection between the guide wheel 562 and the other side of the driving member 53 opposite to the rack 531 makes the transmission stable and the resistance low. Preferably, the guide wheel 562 is an H-beam wheel, but it is not limited to this. The H-beam wheel can better restrict and guide the driving member 53. Preferably, the transmission device 56 includes two guide wheels 562 that are positioned opposite each other, one above the other. The two guide wheels 562 and the transmission gear 561 form a "triangular structure" that can stably support the driving member 53. The seal 541 is a flexible, suspended square sheet structure.

[0035] like Figures 1 to 6 As shown, the transmission device 56 includes two sets of fixed seats 57 arranged alternately on the left and right, and two sets of transmission devices 56. The transmission gears 561 of the two sets of transmission devices 56 are coaxially arranged and connected by a transmission shaft 58. The transmission shaft 58 is mounted on the output end of the driver 52, and the driver 52 drives the two transmission gears 561 to rotate synchronously by driving the transmission shaft 58. The two sets of transmission devices 56, each including two transmission gears 561, respectively engage with two driving members 53 for transmission. The arrangement of the two driving members 53 facilitates the fixed installation of the mounting base 54. The two transmission gears 561 are connected by the transmission shaft 58 and are coaxially arranged to ensure that the two driving members 53 move up and down synchronously.

[0036] like Figures 1 to 6 As shown, a flange structure 512 is formed at the bottom of the box 51. The flange structure 512 facilitates the installation of the oxidizing atmosphere isolation box 50 into the ventilation section 10 and the slow cooling section 40. The flange structure 512 also helps to enhance the sealing performance.

[0037] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. An oxidizing atmosphere isolation chamber, characterized in that, This invention relates to a bright solution treatment furnace for steel, which includes at least a gas exchange section, a heating section, a rapid cooling section, and a slow cooling section. An oxidizing atmosphere isolation chamber is installed in the gas exchange section and / or the slow cooling section. The oxidizing atmosphere isolation chamber includes a housing, a driver, a driving component, and a mounting base. The housing has a sealed cavity with a bottom opening. The driver is installed in the housing, and the driving component is located in the sealed cavity. The driving component is connected to the output end of the driver. The driver drives the driving component to move up and down within the sealed cavity. The mounting base is installed at the lower end of the driving component, extending downwards beyond the opening end of the sealed cavity. The mounting base is used to load a sealing component that is in close contact with the steel. The driver drives the driving component to move up and down, causing the mounting base to move up and down synchronously, so that the sealing component is in close contact with the steel flowing into the gas exchange section and / or the slow cooling section.

2. The oxidizing atmosphere isolation chamber according to claim 1, characterized in that, The upper end of the drive component extends upward through the top of the housing, and the upper end of the drive component is isolated from the external environment.

3. The oxidizing atmosphere isolation chamber according to claim 2, characterized in that, It also includes a protective sleeve installed above the housing and covering the upper end of the drive unit, the upper end of the drive unit being isolated from the external environment by means of the protective sleeve.

4. The oxidizing atmosphere isolation chamber according to claim 3, characterized in that, It also includes a transmission device and a fixed base installed on the top of the housing. The protective sleeve is installed on the fixed base, and the fixed base has a receiving cavity. The driving member also passes through the receiving cavity. The transmission device is installed in the receiving cavity and is connected to the output end of the driver. The driver drives the driving member to move up and down linearly by driving the transmission device.

5. The oxidizing atmosphere isolation chamber according to claim 4, characterized in that, The transmission device includes a transmission gear rotatably mounted in the accommodating cavity, the driving member is a straight rod, and a rack arranged in the vertical direction is provided on one side of the driving member. The meshing transmission between the transmission gear and the rack drives the driving member to perform vertical linear motion.

6. The oxidizing atmosphere isolation chamber according to claim 5, characterized in that, The transmission device further includes a guide wheel installed in the accommodating cavity to keep the driving member upright. The guide wheel is offset to one side of the transmission gear, and a movement channel is formed between the guide wheel and the transmission gear. The driving member passes through the movement channel, and the guide wheel is in rolling connection with the other side of the driving member relative to the rack.

7. The oxidizing atmosphere isolation chamber according to claim 6, characterized in that, The transmission device includes two guide wheels that are positioned opposite each other, one above the other, and the seal is a flexible, suspended square sheet structure.

8. The oxidizing atmosphere isolation chamber according to claim 5, characterized in that, The transmission device includes two sets of fixed seats arranged at left and right intervals and two sets of transmission devices. The transmission gears of the two sets of transmission devices are coaxially arranged and connected by a transmission shaft. The transmission shaft is installed at the output end of the driver. The driver drives the two transmission gears to rotate synchronously by driving the transmission shaft to rotate.

9. The oxidizing atmosphere isolation chamber according to claim 1, characterized in that, The bottom of the box has a flange structure.

10. A bright solution treatment furnace for steel, characterized in that, It includes at least an air exchange section, a heating section, a rapid cooling section, and a slow cooling section, wherein the air exchange section and / or the slow cooling section are equipped with an oxidizing atmosphere isolation chamber as described in any one of claims 1-9.

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