Multi-section isothermal quenching furnace

Abstract

The invention relates to the technical field of metal heat treatment, and discloses a multi-section isothermal quenching furnace which comprises a main body assembly and a quenching furnace body, a sealing door is arranged on one side of the quenching furnace body, a conveying belt is arranged at the bottom of the quenching furnace body, a base is fixed to the bottom of the conveying belt, and a conveying assembly is arranged on the quenching furnace body and used for conveying the quenching furnace body. Comprising a conveying part, the conveying part comprises a conveying pipe, the conveying pipe is connected to one side of the quenching furnace body in an inserted mode, and a closing plate is arranged on one side of the conveying pipe. The device has the beneficial effects that when the pressure in the furnace is too high, the valve can be automatically opened to release the pressure without manual opening, so that the pressure in the furnace can be kept balanced, the pressure change can be monitored in real time and quickly responded, the time difference of manual operation does not exist, and the working efficiency is improved. The valve can be opened in time to release pressure when the pressure just exceeds a safety range, and irreversible damage to a furnace body caused by rapid rising of the pressure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of metal heat treatment, in particular to a multi-stage isothermal quenching furnace. Background Art

[0002] The multi-stage isothermal quenching furnace is a heat treatment equipment with multiple different temperature zones. During the quenching process, the workpiece will pass through these different temperature zones in sequence according to the set process sequence. First, it will be quickly heated in the high temperature zone to reach the austenitizing temperature, and then enter the isothermal zone to maintain a specific time to make the austenite isothermal transformation. The precise control of different temperature sections helps to achieve diversified organizational transformation, thereby effectively improving the mechanical properties of the workpiece such as hardness, toughness, and strength. It is widely used in many fields such as machinery manufacturing, automobiles, aerospace, etc., to meet the requirements of high-performance heat treatment of workpieces. The multi-stage isothermal process combined with air cooling, heat calibration and other stages can effectively achieve isothermal annealing effects. First, the workpiece is cooled to a certain temperature below A1 at a relatively fast speed. In this process, the multi-stage isothermal can accurately control the cooling speed to avoid the adverse effects caused by too fast or too slow, such as preventing the formation of non-equilibrium organization or prolonging the annealing time. Then, in the insulation stage, the atoms are fully diffused to make the internal organization of the material more uniform, laying the foundation for obtaining ideal performance. Air cooling as a cooling method can evenly lower the temperature of the workpiece and reduce the generation of internal stress. The thermal leveling process utilizes the plasticity of the material at a certain temperature to correct the shape while further promoting the homogenization of the internal structure. It can also adjust the stress distribution, reduce the overall internal stress, and improve the dimensional stability of the workpiece. In this way, through the coordinated cooperation of various stages, the good effect of isothermal annealing is guaranteed and the comprehensive performance of the workpiece is improved.

[0003] When heating in the heating furnace, air pressure will be generated and then pressure will be formed. As the heating progresses, the gas in the furnace begins to expand according to the principle of thermal expansion and contraction. At the same time, if there are some substances in the furnace that can decompose and volatilize to produce gas at high temperature, the amount of gas will be increased. The internal space of the heating furnace is relatively fixed, and the activity range of gas molecules is limited. A large amount of gas accumulates in a limited space, which will exert force on the furnace wall and internal components, thereby forming pressure. Excessive pressure will exert a huge force on the furnace structure, which may cause cracks in the welds of the furnace body, deformation of the furnace wall, or even rupture. In severe cases, it may also It may cause dangerous accidents such as explosions. At this time, the operator needs to manually release the pressure to reduce the excessive pressure in the furnace to avoid damage to the furnace body due to inability to withstand the pressure, and to ensure the structural integrity and safe and stable operation of the heating furnace itself. It is difficult for the operator to accurately monitor the pressure changes in the furnace in real time. They often start to manually release the pressure only after finding some obvious signs, such as abnormal sounds in the furnace body or the pressure instrument showing too high a value. There is a certain time difference in between, and during this time, the pressure in the furnace may have rapidly risen to a very high level, causing irreversible damage to the furnace body. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above and / or existing problems in multi-stage isothermal quenching furnaces, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is that it is difficult for operators to manually release the excessive pressure in the heating furnace in real-time and accurately monitor it. They often operate based on obvious signs, resulting in a time difference. During this period, the pressure in the furnace may rise rapidly, causing irreversible damage to the furnace body.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A multi-stage isothermal quenching furnace, which includes a main body component, including a quenching furnace body. A closing door is provided on one side of the quenching furnace body. A conveyor belt is provided at the bottom of the quenching furnace body, and a base is fixed to the bottom of the conveyor belt. A conveying component is provided on the quenching furnace body, including a conveying member. The conveying member includes a conveying pipe, which is inserted into one side of the quenching furnace body. A closing plate is provided on one side of the conveying pipe. A driving ring is provided on one side of the closing plate. The driving ring and one side of the closing plate are hinged. A valve pipe is provided on one side of the closing plate, and a valve plate is provided inside the valve pipe.

[0008] As a preferred solution of the multi-stage isothermal quenching furnace of the present invention, wherein: The conveying component further includes a driving member, the driving member includes a hinged bar, the hinged bar is hinged to one side of the closing plate, a positioning disk is provided on one side of the hinged bar, and the hinged bar and the positioning disk are rotatably connected through a rotating shaft.

[0009] As a preferred solution of the multi-stage isothermal quenching furnace of the present invention, wherein: A rotating ring is fixed to one side of the driving ring, a moving block is fixed to one side of the rotating ring, and a moving bar is fixed to one side of the moving block.

[0010] As a preferred solution of the multi-stage isothermal quenching furnace of the present invention, wherein: A movable block is fixed to one side of the rotating ring, a tension spring is fixed to one side of the moving block, and one end of the tension spring is fixed to a support block, and the support block is fixed to one side of the positioning disk.

[0011] As a preferred embodiment of the multi-stage isothermal quenching furnace of the present invention, wherein: the conveying assembly further includes a movable member, the movable member includes a movable frame, the movable frame is sleeved outside the moving bar, a driving groove corresponding to the moving bar is formed on the movable frame, and the moving bar slides in the driving groove.

[0012] As a preferred embodiment of the multi-stage isothermal quenching furnace of the present invention, wherein: a moving plate is fixed to the bottom of the movable frame, a moving frame is arranged on one side of the moving plate, a first spring is fixed to the top of the moving frame, a positioning column is inserted into the bottom of the moving frame, and the moving frame is movably connected to the positioning column.

[0013] As a preferred embodiment of the multi-stage isothermal quenching furnace of the present invention, wherein: a shielding frame is sleeved outside the positioning column, a stress plate is fixed to the bottom of the moving frame, a protective frame is sleeved outside the shielding frame, an air delivery pipe is inserted into one side of the protective frame, and a connecting pipe is fixed to the bottom of the protective frame, and the connecting pipe is arranged at the bottom of the shielding frame.

[0014] As a preferred embodiment of the multi-stage isothermal quenching furnace of the present invention, wherein: the conveying assembly further includes a rotating member, the rotating member includes a rotating bar, the rotating bar is inserted into one side of the valve plate, the rotating bar is rotatably connected to the inner wall of the valve pipe through a rotating shaft, a first torsion spring is fixed to one end of the rotating bar, and one end of the first torsion spring is fixed to the inner wall of the valve pipe.

[0015] As a preferred embodiment of the multi-stage isothermal quenching furnace of the present invention, wherein: a limiting bar is fixed to one end of the rotating bar, a shielding bar is arranged on one side of the limiting bar, a rotating rod is fixed to one side of the shielding bar, a support box is sleeved outside the rotating rod, the support box is rotatably connected to the rotating rod, a turntable is fixed to one end of the rotating rod, a second torsion spring is fixed to one side of the turntable, and one end of the second torsion spring is fixed to one side of the support box.

[0016] As a preferred embodiment of the multi-stage isothermal quenching furnace of the present invention, wherein: the conveying assembly further includes a positioning member, the positioning member includes a positioning frame, the positioning frame is fixed to one side of the support box, a positioning bar is arranged on one side of the positioning frame, a connecting plate is fixed to one side of the positioning bar, a sliding bar is fixed to the bottom of the moving plate, a sliding frame is sleeved outside the sliding bar, the sliding bar is slidably connected to the sliding frame, a third spring is fixed to one side of the sliding bar, and one end of the third spring is fixed to the inner wall of the sliding frame.

[0017] The beneficial effects of the present invention are as follows: When the pressure in the furnace is too high, the valve can be automatically opened to release the pressure, without the need for manual operation, so as to maintain the pressure balance in the furnace. Thus, the pressure change can be monitored in real time and responded to quickly, without the time difference of manual operation. The valve can be opened in time to release the pressure just when the pressure exceeds the safe range, avoiding irreversible damage to the furnace body caused by the rapid rise of pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them: Figure 1 It is the overall structure diagram of a multi-stage isothermal quenching furnace.

[0019] Figure 2 It is the valve pipe structure diagram of a multi-stage isothermal quenching furnace.

[0020] Figure 3 It is the conveying pipe structure diagram of a multi-stage isothermal quenching furnace.

[0021] Figure 4 It is the valve plate structure diagram of a multi-stage isothermal quenching furnace.

[0022] Figure 5 It is the limit bar structure diagram of a multi-stage isothermal quenching furnace.

[0023] Figure 6 It is the sliding frame cross-section structure diagram of a multi-stage isothermal quenching furnace.

[0024] Figure 7 It is the shielding frame cross-section structure diagram of a multi-stage isothermal quenching furnace.

[0025] Figure 8 It is the movable frame structure diagram of a multi-stage isothermal quenching furnace.

[0026] Figure 9 It is the tension spring structure diagram of a multi-stage isothermal quenching furnace.

[0027] Figure 10 It is the closing plate structure diagram of a multi-stage isothermal quenching furnace. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention in conjunction with the drawings of the specification.

[0029] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Persons skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that are mutually exclusive of other embodiments.

[0031] Embodiment 1 Referring to Figures 1 to 10 , which is the first embodiment of the present invention. This embodiment provides a multi-stage isothermal quenching furnace. The multi-stage isothermal quenching furnace includes a main body assembly 100 and a conveying assembly 200. When the pressure in the furnace is too high, they can cooperate to automatically open the valve to release the pressure, so as to respond in real time without time difference and can timely avoid irreversible damage to the furnace body caused by pressure rise.

[0032] The main body assembly 100 includes a quenching furnace body 101. A closing door 102 is provided on one side of the quenching furnace body 101. A conveyor belt 103 is provided at the bottom of the quenching furnace body 101. A base 104 is fixed to the bottom of the conveyor belt 103.

[0033] Generally, there are multiple quenching furnace bodies 101, and closing doors 102 are provided on both sides of each quenching furnace body 101. The multiple quenching furnace bodies 101 can respectively undertake different stage tasks. Some quenching furnace bodies 101 are specifically used for the heating stage to heat the workpiece to a suitable austenitizing temperature, accurately control the heating rate and holding time, and ensure that the internal structure of the workpiece is fully transformed. Some can be used for the isothermal stage to simulate the temperature environment required by isothermal annealing, keep the workpiece at a certain temperature below A1 for a certain period of time, and achieve stable isothermal transformation. There are also some quenching furnace bodies 101 that can cooperate with operations such as air cooling and hot straightening to perform subsequent processing under corresponding temperature conditions, further optimize the tissue performance of the workpiece, eliminate internal stress, and ensure the regularity of the workpiece shape. Through the division of labor and cooperation of multiple quenching furnace bodies 101, the entire multi-stage isothermal quenching process can be carried out more orderly and efficiently, ensuring that the workpiece finally achieves an ideal heat treatment effect.

[0034] The quenching furnace body 101 is the core place for implementing the entire quenching process, providing a specific high-temperature environment for workpieces and heating them according to the set process parameters. The quenching furnace body 101 has a perfect heating system inside, which can accurately raise the temperature in the furnace to the temperature values required for different heat treatment stages such as austenitizing the workpieces. The closing door 102 can be closed when the quenching furnace body 101 is working, forming a relatively sealed space to prevent a large amount of heat loss, which helps to maintain the high-temperature environment inside the quenching furnace body 101, ensure the heating efficiency, reduce energy consumption, and ensure that the quenching process can proceed smoothly under stable temperature conditions. The conveyor belt 103 can smoothly transport the workpieces to be quenched from the external loading area to the entrance of the quenching furnace body 101, facilitating the smooth entry of the workpieces into the quenching furnace body 101 to start quenching heating and other processes. When the workpieces complete the corresponding heat treatment stages inside the quenching furnace body 101, the conveyor belt 103 can then receive the quenched workpieces coming out of the furnace and continue to transport them to subsequent processing areas or cooling areas, etc. The conveyor belt 103 can be supported by the base 104 to prevent the conveyor belt 103 from shifting.

[0035] The conveying assembly 200 is arranged on the quenching furnace body 101 and includes a conveying member 201. The conveying member 201 includes a conveying pipe 2011, and the conveying pipe 2011 is inserted into one side of the quenching furnace body 101. A closing plate 2012 is arranged on one side of the conveying pipe 2011, a driving ring 2013 is arranged on one side of the closing plate 2012, the driving ring 2013 and the closing plate 2012 are hinged on one side, a valve pipe 2014 is arranged on one side of the closing plate 2012, and a valve plate 2015 is arranged inside the valve pipe 2014.

[0036] The number of the closing plates 2012 is four, and they are all arranged on one side of the conveying pipe 2011. The driving ring 2013 is movably connected to the positioning disk 2022 through a bearing. The valve pipe 2014 is fixed on one side of the conveying pipe 2011. By rotating the driving ring 2013, the four closing plates 2012 can be driven to move towards each other, so that the closing plates 2012 can be opened. Then the air pressure inside the quenching furnace body 101 can be transmitted to the valve pipe 2014 through the conveying pipe 2011. After entering the valve pipe 2014, it will squeeze the valve plate 2015 to open it. Through the opening of the valve plate 2015, the air pressure inside the quenching furnace body 101 can be transmitted outside the furnace. When the air pressure stops being generated, the valve plate 2015 will close to seal the valve pipe 2014. A sealing ring is sleeved outside the valve plate 2015, which can maintain the sealing performance when closed. The valve plate 2015 can only open to one side to transmit the air pressure out, and the outside air cannot be transmitted into the quenching furnace body 101 through the valve pipe 2014.

[0037] When the pressure is too high, the closing plate 2012 opens first. At this time, a preliminary release and buffer space is provided for the high-pressure gas in the quenching furnace body 101, and the pressure is adjusted in a small range, making the pressure drop process in the quenching furnace body 101 relatively gentle and gradual. If only relying on the valve pipe 2014, once its opening pressure is reached, a relatively large air release channel is often directly opened, which may cause the pressure in the quenching furnace body 101 to drop sharply, resulting in a situation where the pressure fluctuation amplitude is too large. The opening of the closing plate 2012 can be regarded as the first step of pressure adjustment. Subsequently, according to the pressure situation, the valve plate 2015 is further squeezed to open an appropriate degree for air release, realizing a more hierarchical and gradual pressure adjustment process. For those quenching processes that are sensitive to pressure changes, the gradual pressure adjustment helps to maintain stable process conditions, ensuring that the workpiece can uniformly complete various stages such as austenitization and isothermal transformation in a suitable pressure environment, and finally obtaining ideal mechanical properties such as hardness and toughness, improving the product qualification rate.

[0038] Embodiment 2 Refer to Figures 1 to 10 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0039] Specifically, the conveying assembly 200 further includes a driving member 202. The driving member 202 includes a hinged strip 2021. The hinged strip 2021 is hinged to one side of the closing plate 2012. A positioning disk 2022 is arranged on one side of the hinged strip 2021, and the hinged strip 2021 and the positioning disk 2022 are rotationally connected through a rotating shaft.

[0040] The number of the hinged strips 2021 is four, all of which are hinged to one side of the closing plate 2012. The positioning disk 2022 is fixed to one side of the quenching furnace body 101. Through the setting of the positioning disk 2022, the hinged strip 2021 can be supported. When the hinged strip 2021 moves, it can drive the hinged strip 2021 to move. At this time, through the support of the hinged strip 2021, the four closing plates 2012 can move towards each other to open, and vice versa to close.

[0041] Specifically, a rotating ring 2023 is fixed to one side of the driving ring 2013, a moving block 2024 is fixed to one side of the rotating ring 2023, and a moving strip 2025 is fixed to one side of the moving block 2024.

[0042] When the pressure in the quenching furnace body 101 reaches a certain preset value, it will drive the moving strip 2025 to move. At this time, through the movement of the moving strip 2025, the moving block 2024 can be driven to move. Through the movement of the moving block 2024, the rotating ring 2023 can be driven to rotate, and then through the rotation of the rotating ring 2023, the driving ring 2013 can be driven to rotate, so that the closing plate 2012 can be opened.

[0043] Specifically, one side of the rotating ring 2023 is fixed with a movable block 2026. One side of the movable block 2026 is fixed with a tension spring 2027. One end of the tension spring 2027 is fixed with a support block 2028, and the support block 2028 is fixed on one side of the positioning disk 2022.

[0044] When the rotating ring 2023 rotates to open the closing plate 2012, it can drive the movable block 2026 to move. At this time, a pulling force can be applied to the tension spring 2027 through the movement of the movable block 2026. Through the setting of the support block 2028, one end of the tension spring 2027 can be supported to prevent the tension spring 2027 from shifting. When the pressure of the quenching furnace body 101 returns to normal, the rotating ring 2023 can be driven to rotate back by the rebounding force of the tension spring 2027, so that the closing plate 2012 can be closed again.

[0045] Specifically, the conveying component 200 further includes a movable member 203. The movable member 203 includes a movable frame 2031. The movable frame 2031 is sleeved outside the moving strip 2025. A driving groove 2031-1 corresponding to the moving strip 2025 is formed on the movable frame 2031, and the moving strip 2025 slides in the driving groove 2031-1.

[0046] When the movable frame 2031 moves, it can drive the driving groove 2031-1 to squeeze the moving strip 2025, so that the moving strip 2025 can move. At this time, the rotating ring 2023 can be driven to rotate through the movement of the moving strip 2025, so that the closing plate 2012 can be opened.

[0047] Specifically, a moving plate 2032 is fixed to the bottom of the movable frame 2031. A moving frame 2033 is arranged on one side of the moving plate 2032. A first spring 2034 is fixed to the top of the moving frame 2033. A positioning column 2035 is inserted into the bottom of the moving frame 2033, and the moving frame 2033 is movably connected to the positioning column 2035.

[0048] The movement of the moving frame 2033 can drive the movable frame 2031 to move. When the moving frame 2033 moves, it can move on the positioning column 2035. Through the setting of the positioning column 2035, the moving frame 2033 can be supported to prevent the moving frame 2033 from shifting. And when the moving frame 2033 moves, a squeezing force can be applied to the first spring 2034. The moving frame 2033 can be driven to return to its original position by the rebounding force of the first spring 2034.

[0049] Embodiment 3 Refer to Figures 1 to 10 , which is the third embodiment of the present invention. This embodiment is based on the first two embodiments.

[0050] Specifically, a shielding frame 2036 is sleeved outside the positioning column 2035. A stress plate 2037 is fixed to the bottom of the moving frame 2033. A protective frame 2039 is sleeved outside the shielding frame 2036. An air delivery pipe 2038 is inserted into one side of the protective frame 2039. A connecting pipe 2030 is fixed to the bottom of the protective frame 2039. The connecting pipe 2030 is arranged at the bottom of the shielding frame 2036.

[0051] One end of the first spring 2034 is fixed to the inner wall of the shielding frame 2036. The shielding frame 2036 can support the first spring 2034 and the positioning column 2035 to prevent them from shifting. The protective frame 2039 is fixed to the inner wall of the quenching furnace body 101. The protective frame 2039 can support the shielding frame 2036. Filter plates are fixed to the bottoms of both the air delivery pipe 2038 and the connecting pipe 2030, which are used to filter the debris generated in the quenching furnace body 101. During cleaning, the filter plates can be directly cleaned without cleaning the inside of the pipes, reducing the cleaning cost. When excessive pressure is generated in the quenching furnace body 101, the stress plate 2037 can be extruded to move. At this time, the movement of the stress plate 2037 can drive the movement of the moving frame 2033. The connecting pipe 2030 can guide the air pressure to extrude the stress plate 2037. The air delivery pipe 2038 communicates with the protective frame 2039. The air delivery pipe 2038 can transmit the air pressure inside to the valve pipe 2014 for discharge. Two air holes are provided on the stress plate 2037 to facilitate the transmission of gas. And the components inside the quenching furnace body 101 are all made of high-temperature resistant materials.

[0052] Specifically, the conveying assembly 200 further includes a rotating member 204. The rotating member 204 includes a rotating bar 2041. The rotating bar 2041 is inserted into one side of the valve plate 2015. The rotating bar 2041 is rotatably connected to the inner wall of the valve pipe 2014 through a rotating shaft. One end of the rotating bar 2041 is fixed with a first torsion spring 2042. One end of the first torsion spring 2042 is fixed to the inner wall of the valve pipe 2014.

[0053] When the valve plate 2015 rotates to open, the rotating bar 2041 can rotate. At this time, the rotation of the rotating bar 2041 can apply a torsional force to the first torsion spring 2042. Then, when the valve plate 2015 is opened, the pressure can be released. When the pressure reaches equilibrium, the return force of the first torsion spring 2042 can drive the valve plate 2015 to return to its original position to close the valve pipe 2014.

[0054] Specifically, one end of the rotating bar 2041 is fixed with a limiting bar 2049. One side of the limiting bar 2049 is provided with a shielding bar 2043. One side of the shielding bar 2043 is fixed with a rotating rod 2044. The outer side of the rotating rod 2044 is sleeved with a support box 2045. The support box 2045 is rotatably connected to the rotating rod 2044. One end of the rotating rod 2044 is fixed with a turntable 2046. One side of the turntable 2046 is fixed with a second torsion spring 2047. One end of the second torsion spring 2047 is fixed to one side of the support box 2045.

[0055] The support box 2045 is fixed to one side of the valve pipe 2014. By rotating the turntable 2046, the rotating rod 2044 can be driven to rotate. At this time, a torsional force can be applied to the second torsion spring 2047. Then, when the rotating rod 2044 rotates, the shielding bar 2043 can be driven to rotate. At this time, the shielding bar 2043 can be rotated to a specified position. When the valve plate 2015 is opened to drive the rotating bar 2041 to rotate, the limiting bar 2049 can be driven to rotate. At this time, through the setting of the shielding bar 2043, the limiting bar 2049 can be limited, so that the valve plate 2015 can be opened to a specified position. The opening size of the valve plate 2015 directly determines the flow cross-sectional area of the exhaust passage. Under a certain furnace internal pressure difference, the gas flow rate is proportional to the flow cross-sectional area. By opening the valve plate 2015 to a specified size, the gas discharge flow rate can be accurately regulated. For example, when the pressure in the quenching furnace body 101 slightly increases and only a small amount of exhaust adjustment is required, the valve plate 2015 can be opened to a small angle to achieve small-flow exhaust. When the pressure increase is large and rapid pressure reduction is required, the valve plate 2015 is opened to a large angle to increase the exhaust volume, so that the pressure in the quenching furnace body 101 can be accurately maintained within the range meeting the requirements of the quenching process, meeting the needs of different pressure adjustment scenarios. The support box 2045 is used to support the rotating rod 2044 to prevent the rotating rod 2044 from shifting.

[0056] Specifically, the conveying assembly 200 further includes a positioning member 205. The positioning member 205 includes a positioning frame 2051. The positioning frame 2051 is fixed to one side of the support box 2045. One side of the positioning frame 2051 is provided with a positioning bar 2052. One side of the positioning bar 2052 is fixed with a connecting plate 2053. The bottom of the connecting plate 2053 is fixed with a sliding bar 2054. The outer side of the sliding bar 2054 is sleeved with a sliding frame 2055. The sliding bar 2054 is slidably connected to the sliding frame 2055. One side of the sliding bar 2054 is fixed with a third spring 2056. One end of the third spring 2056 is fixed to the inner wall of the sliding frame 2055.

[0057] A positioning groove corresponding to the positioning strip 2052 is provided on the positioning frame 2051. After moving the shielding strip 2043 to a specified position, the shielding strip 2043 can be limited by engaging the positioning strip 2052 with the positioning groove, so that the shielding strip 2043 can limit the moving position of the limiting strip 2049. When moving the connecting plate 2053, the sliding strip 2054 can be driven to move on the sliding frame 2055. The sliding frame 2055 is fixed to one side of the turntable 2046. Through the setting of the sliding frame 2055, the sliding strip 2054 can be supported. When the sliding strip 2054 moves, an extrusion force can be applied to the third spring 2056. At this time, the positioning strip 2052 can be separated from the positioning groove, so as to release the limit on the shielding strip 2043. Then, the turntable 2046 can be driven to rotate back to its original position by the rotational force of the second torsion spring 2047. After rotating the turntable 2046 to a specified position and releasing the connecting plate 2053, the sliding strip 2054 can be driven to return to its original position by the rebounding force of the third spring 2056, so that the positioning strip 2052 and the positioning groove are engaged again to limit the shielding strip 2043 again.

[0058] During use, push the connecting plate 2053. The connecting plate 2053 drives the positioning strip 2052 to move. At the same time, the movement of the connecting plate 2053 drives the sliding strip 2054 to slide in the sliding frame 2055. When the sliding strip 2054 moves, an extrusion force will be applied to the third spring 2056. As the connecting plate 2053 continues to move, the positioning strip 2052 will be separated from the positioning groove on the positioning frame 2051, so as to release the limit on the turntable 2046. At this time, the turntable 2046 can be rotated. Then rotate the turntable 2046 to rotate around the connection point with the support box 2045. The rotation of the turntable 2046 drives the rotation rod 2044 to rotate, and the rotation rod 2044 drives the shielding strip 2043 to rotate accordingly. During the rotation process, according to the actual control requirements for the opening size of the valve plate 2015, the shielding strip 2043 is rotated to a corresponding specified position to achieve precise limitation of the opening degree of the valve plate 2015 subsequently. When rotating the turntable 2046, the rotation of the turntable 2046 will apply a torsional force to the second torsion spring 2047 fixed on one side of it. After rotating the turntable 2046 to a specified position and releasing the connecting plate 2053, at this time, the rebounding force of the third spring 2056 can drive the positioning strip 2052 to return to its original position and engage with the positioning groove, and then the quenching furnace body 101 can be used.

[0059] When the pressure inside the quenching furnace body 101 reaches a certain threshold, the high-pressure gas will squeeze the force-bearing plate 2037. The force-bearing plate 2037 drives the moving frame 2033 to move under the extrusion. The moving frame 2033 moves on the positioning column 2035 and applies an extrusion force to the first spring 2034. The movement of the moving frame 2033 drives the moving plate 2032 to move, and the moving plate 2032 drives the movable frame 2031 to move. When the movable frame 2031 moves, the driving groove 2031-1 opened inside it squeezes the moving bar 2025 to make the moving bar 2025 move. The movement of the moving bar 2025 drives the moving block 2024 to move, and then drives the rotating ring 2023 to rotate. The rotation of the rotating ring 2023 drives the driving ring 2013 to rotate. The rotation of the driving ring 2013 drives the four hinged closing plates 2012 to move towards each other to open the closing plates 2012. When the rotation of the rotating ring 2023 opens the closing plates 2012, it can drive the movable block 2026 to move. At this time, the movement of the movable block 2026 can apply a pulling force to the tension spring 2027. Then, a preliminary release and buffer space for the high-pressure gas inside the quenching furnace body 101 is created, and the pressure is adjusted in a small range, making the pressure drop process inside the quenching furnace body 101 relatively gentle and gradual. After the closing plates 2012 are opened, the pressure inside the quenching furnace body 101 needs to be further adjusted. The air pressure inside the quenching furnace body 101 is transmitted to the valve pipe 2014 through the delivery pipe 2011. The air pressure squeezes the valve plate 2015 inside the valve pipe 2014 to open it. The opening of the valve plate 2015 drives the rotating bar 2041 to rotate. The rotation of the rotating bar 2041 applies a torsional force to the first torsion spring 2042. The gas is discharged through the channel formed by the opening of the valve plate 2015, realizing further air release and pressure adjustment, so that the pressure inside the quenching furnace body 101 can return to normal.

[0060] When the pressure inside the quenching furnace body 101 returns to normal, the rebounding force of the tension spring 2027 drives the movable block 2026 to move. The movement of the movable block 2026 drives the rotating ring 2023 to rotate back. The rotation back of the rotating ring 2023 drives the driving ring 2013 to rotate back. The rotation back of the driving ring 2013 drives the closing plates 2012 to close again, making the quenching furnace body 101 return to a relatively sealed state. After the pressure is balanced, the rotating force of the first torsion spring 2042 drives the valve plate 2015 to return to its original position to close the valve pipe 2014, preventing external air from entering the quenching furnace body 101 and ensuring the normal working environment of the quenching furnace.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A multi-stage austempering furnace, characterized in that: including, a main body component (100), including a quenching furnace body (101), a closing door (102) is arranged on one side of the quenching furnace body (101), a conveyor belt (103) is arranged at the bottom of the quenching furnace body (101), and a base (104) is fixed to the bottom of the conveyor belt (103); a conveying component (200), arranged on the quenching furnace body (101), including a conveying member (201), the conveying member (201) includes a conveying pipe (2011), the conveying pipe (2011) is inserted into one side of the quenching furnace body (101), a closing plate (2012) is arranged on one side of the conveying pipe (2011), a driving ring (2013) is arranged on one side of the closing plate (2012), the driving ring (2013) and the closing plate (2012) are hinged on one side, a valve pipe (2014) is arranged on one side of the closing plate (2012), and a valve plate (2015) is arranged in the valve pipe (2014).

2. The multi-stage austempering furnace according to claim 1, wherein: The conveying component (200) further includes a driving member (202), the driving member (202) includes a hinged bar (2021), the hinged bar (2021) is hinged to one side of the closing plate (2012), a positioning disk (2022) is arranged on one side of the hinged bar (2021), and the hinged bar (2021) and the positioning disk (2022) are rotatably connected through a rotating shaft.

3. The multi-stage isothermal quenching furnace according to claim 2, wherein: A rotating ring (2023) is fixed to one side of the driving ring (2013), a moving block (2024) is fixed to one side of the rotating ring (2023), and a moving bar (2025) is fixed to one side of the moving block (2024).

4. The multi-stage isothermal quenching furnace according to claim 3, characterized in that: An active block (2026) is fixed to one side of the rotating ring (2023), a tension spring (2027) is fixed to one side of the active block (2026), one end of the tension spring (2027) is fixed to a support block (2028), and the support block (2028) is fixed to one side of the positioning disk (2022).

5. The multi-stage isothermal quenching furnace according to claim 4, characterized in that: The conveying component (200) further includes an active member (203), the active member (203) includes an active frame (2031), the active frame (2031) is sleeved outside the moving bar (2025), a driving groove (2031-1) corresponding to the moving bar (2025) is formed in the active frame (2031), and the moving bar (2025) slides in the driving groove (2031-1).

6. The multi-stage austempering furnace according to claim 5, characterized in that: A moving plate (2032) is fixed to the bottom of the active frame (2031), a moving frame (2033) is arranged on one side of the moving plate (2032), a first spring (2034) is fixed to the top of the moving frame (2033), a positioning column (2035) is inserted into the bottom of the moving frame (2033), and the moving frame (2033) and the positioning column (2035) are movably connected.

7. The multi-stage isothermal quenching furnace according to claim 6, characterized in that: A shielding frame (2036) is sleeved outside the positioning column (2035). A stress plate (2037) is fixed to the bottom of the moving frame (2033). A protective frame (2039) is sleeved outside the shielding frame (2036). An air delivery pipe (2038) is inserted into one side of the protective frame (2039). A connecting pipe (2030) is fixed to the bottom of the protective frame (2039), and the connecting pipe (2030) is arranged at the bottom of the shielding frame (2036).

8. The multi-stage isothermal quenching furnace according to claim 7, wherein: The conveying assembly (200) further includes a rotating member (204). The rotating member (204) includes a rotating bar (2041). The rotating bar (2041) is inserted into one side of the valve plate (2015). The rotating bar (2041) is rotatably connected to the inner wall of the valve pipe (2014) through a rotating shaft. A first torsion spring (2042) is fixed to one end of the rotating bar (2041), and one end of the first torsion spring (2042) is fixed to the inner wall of the valve pipe (2014).

9. The multi-stage isothermal quenching furnace according to claim 8, characterized in that: A limiting bar (2049) is fixed to one end of the rotating bar (2041). A shielding bar (2043) is arranged on one side of the limiting bar (2049). A rotating rod (2044) is fixed to one side of the shielding bar (2043). A support box (2045) is sleeved outside the rotating rod (2044). The support box (2045) is rotatably connected to the rotating rod (2044). A turntable (2046) is fixed to one end of the rotating rod (2044). A second torsion spring (2047) is fixed to one side of the turntable (2046), and one end of the second torsion spring (2047) is fixed to one side of the support box (2045).

10. The multi-stage isothermal quenching furnace according to claim 9, characterized in that: The conveying assembly (200) further includes a positioning member (205). The positioning member (205) includes a positioning frame (2051). The positioning frame (2051) is fixed to one side of the support box (2045). A positioning bar (2052) is arranged on one side of the positioning frame (2051). A connecting plate (2053) is fixed to one side of the positioning bar (2052). A sliding bar (2054) is fixed to the bottom of the connecting plate (2053). A sliding frame (2055) is sleeved outside the sliding bar (2054). The sliding bar (2054) is slidably connected to the sliding frame (2055). A third spring (2056) is fixed to one side of the sliding bar (2054), and one end of the third spring (2056) is fixed to the inner wall of the sliding frame (2055).

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