A heat treatment device for special steel valves and a method of using the same

Abstract

This invention relates to the field of special steel valve technology, specifically to a heat treatment device and its method for special steel valves. The device includes a base, a heat treatment component on one end face of the base, a gas conveying assembly fitted to the end face of the heat treatment component for conveying inert gas, a circulation assembly fitted to the heat treatment component for heating the inert gas with waste gas, a processing assembly fitted between the end face of the base and the circulation assembly for agitating the interior of the heat treatment component with waste gas to accelerate gas flow, and a transport assembly fitted to the end face of the base for placing a storage component. Through the cooperation of these structures, this invention enables the moving rod and sliding fan blades to move up and down cyclically, thereby accelerating gas flow inside the heat treatment chamber and preventing uneven temperature distribution within the chamber.

Description

Technical Field

[0001] This invention relates to the field of special steel valve technology, specifically to a heat treatment device for special steel valves and its usage method. Background Technology

[0002] Special steel valves are widely used in high-temperature and high-pressure applications such as petroleum, chemical, and nuclear power industries. Their heat treatment processes (such as normalizing, quenching, and tempering) are crucial in determining the valve's final mechanical properties and metallographic structure. Currently, the industry commonly uses individual heat treatment furnaces (such as bogie-type resistance furnaces and box furnaces) to heat valves batch by batch. The air content in the furnace during heat treatment affects the finished product. The steel surface is in direct contact with air, which leads to oxidation and decarburization (carbon loss) on the valve surface. The decarburized layer will significantly reduce the fatigue strength and surface hardness of the valve, which is irreversible damage to the precision-fitted sealing surface. To avoid the above situation, it is usually necessary to install a special extraction pump (ordinary pumps cannot withstand high temperatures), which increases the equipment cost. Furthermore, the heat-carrying gas replaced during the heat treatment process cannot be effectively utilized, resulting in heat loss. Therefore, a heat treatment device and its usage method for special steel valves are needed to improve the above-mentioned problems. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a heat treatment apparatus for special steel valves and a method for using the same, thereby resolving the problems described above.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A heat treatment device for special steel valves includes a base, a heat treatment component disposed on the end face of the base, a gas conveying assembly fitted on the end face of the heat treatment component for conveying inert gas, a circulation assembly fitted on the heat treatment component for heating the inert gas with waste gas, a processing assembly fitted between the end face of the base and the circulation assembly for agitating the interior of the heat treatment component with waste gas to accelerate the gas flow inside the heat treatment component, a transport assembly mounted on the end face of the base for placing a storage component, and a controller disposed on the end face of the base. The circulation assembly includes a circulation pipe, and the heat treatment component includes a heat treatment box. The heat treatment box is fixedly installed on the end face of the base, and a mounting bracket is symmetrically installed on the end face of the heat treatment box. The circulation pipe is inserted through the mounting bracket. One end of the mounting bracket is connected to the interior of the heat treatment chamber, and the other end of the mounting bracket is connected to the outer wall of the heat treatment chamber but is not connected to the interior of the heat treatment chamber.

[0005] As a preferred embodiment of the present invention, the gas transmission component includes a first gas storage tank and an air pump. The first gas storage tank is fixedly installed on the end face of the heat treatment box. A first connecting pipe is provided on the first gas storage tank. One end of the first connecting pipe away from the first gas storage tank is connected to the air inlet of the air pump. The air outlet of the air pump is connected to a second connecting pipe. One end of the second connecting pipe away from the air pump is connected to a third connecting pipe.

[0006] As a preferred embodiment of the present invention, the third connecting pipe is in a "U" shape. Both ends of the third connecting pipe are respectively connected to a fourth connecting pipe. The fourth connecting pipe is inserted inside the circulation pipe; One end of the fourth connecting pipe away from the third connecting pipe penetrates through the heat treatment box and communicates with the inner cavity of the heat treatment box; The air pump is fixedly installed on the end face of the heat treatment box.

[0007] As a preferred embodiment of the present invention, a communicating pipe is provided on the outer wall of the circulation pipe away from it. The communicating pipe connects the circulation pipe and the inner cavity of the heat treatment box; A second solenoid valve is provided on the outer wall of the communicating pipe. A fifth connecting pipe is connected between the two circulation pipes; The bottom surface of the fifth connecting pipe is connected to a sixth connecting pipe. A fifth solenoid valve is provided on the outer wall of the sixth connecting pipe.

[0008] As a preferred embodiment of the present invention, the treatment component includes a second gas storage tank. The second gas storage tank is provided on the end face of the base. A seventh connecting pipe is provided on the side wall of the second gas storage tank. A third solenoid valve is provided on the seventh connecting pipe; An installation cylinder is provided on the end face of the base. The installation cylinder penetrates through the bottom of the heat treatment box and communicates with the inner cavity of the heat treatment box; A moving rod is slidably installed in the installation cylinder. A first connecting ring is installed below the outer wall of the moving rod. A fixed ring is installed above the inner cavity of the installation cylinder. A second connecting ring is installed above the side wall of the moving rod; The fixed ring is located between the second connecting ring and the first connecting ring.

[0009] As a preferred embodiment of the present invention, sliding fan blades are symmetrically installed above the side wall of the moving rod. A connecting ring eight is installed on the side wall of the installation cylinder. A fourth solenoid valve is installed on the outer wall of the connecting ring eight. The position of the connecting ring eight faces the transportation component.

[0010] As a preferred embodiment of the present invention, an electric telescopic rod is installed on the end face of the heat treatment box. The telescopic end of the electric telescopic rod penetrates through the end face of the heat treatment box and extends into the inner cavity of the heat treatment box. The end of the telescopic shaft of the heat treatment box is connected to a moving plate; Pulling frames are symmetrically installed on the bottom surface of the moving plate. The pulling frames are in an "L" shape.

[0011] As a preferred embodiment of the present invention, the transport component includes a mounting frame, the mounting frame is fixedly mounted on the end face of the base, a lead screw is rotatably mounted in the inner cavity of the mounting frame, and two moving blocks are threadedly connected to the lead screw; A motor is mounted on the outer wall of the mounting frame, and the power output shaft of the motor passes through the mounting frame and is fixedly connected to a lead screw. The storage component is placed on the end face of the movable block. The storage component includes a storage box, and connecting plates are fixedly installed on the left and right sides of the storage box, respectively. Both the storage box and the pull-out rack have multiple holes.

[0012] A method of using a heat treatment apparatus for special steel valves. S1. Before using the device, first check whether the controller is controlling the electrical components such as the air pump, solenoid valve one, solenoid valve two, solenoid valve three, and fixed ring normally; S2. Then place the storage box with the valve on the end face of the moving block and start the motor to drive the lead screw to rotate, thereby moving the moving block and the storage box below the moving plate. At this time, the connecting plate will be located above the bend of the pulling frame. S3. Then, start the electric telescopic rod to move the moving plate and the pulling frame upwards until the storage box closes the bottom opening of the heat treatment box; S4. To avoid oxidation and decarburization of special steel valves, it is necessary to further reduce the oxygen content inside the heat treatment box. At this time, start the air pump and open the solenoid valve one. Then, the inert gas in the air storage tank one is transferred from the air storage tank one, solenoid valve one, air pump, connecting pipe two, connecting pipe three and connecting pipe four to the heat treatment box. S5. During this process, the gas volume in the heat treatment box increases, and then the original gas in the heat treatment box will be compressed from the other side into the circulation pipe. The heat carried by the original gas in the circulation pipe will come into contact with the connecting pipe four, thereby heating the inert gas in the connecting pipe four and realizing the utilization of waste gas. Furthermore, it is necessary to close solenoid valve two and open solenoid valve five, so that the exhaust gas is transferred to storage tank two for collection. S6. After a period of time, the oxygen content in the heat treatment chamber will decrease. At this time, close solenoid valve five and open solenoid valve two. At this time, choose whether to increase the gas pressure in the heat treatment chamber according to actual needs. If necessary, keep solenoid valve one open and the air pump running. If not needed, close the solenoid valve and stop the air pump; S7. Further, during the heat treatment of the special steel valve in the heat treatment box, the solenoid valve three is opened, and then the high-pressure gas in the gas storage tank two is transported from the connecting pipe seven to the installation cylinder, and pushes the moving rod and sliding fan blades to move upward. Then, solenoid valve three closes and solenoid valve four opens to release pressure inside the mounting cylinder. Then, under the action of gravity, the moving rod drives the sliding fan blade to descend. Solenoid valves three and four open and close alternately, so that the moving rod and the sliding fan blade move up and down in a cycle, thereby accelerating the gas flow inside the heat treatment box and avoiding the problem of uneven temperature in some parts of the heat treatment box. S8. Furthermore, when the special steel valves in the first batch of storage boxes are undergoing heat treatment, the second batch of special steel valves can be placed on the end face of another moving block on the transport assembly, and moved below the moving plate by the rotation of the motor. When the solenoid valve four is opened, the hot airflow discharged from the connecting ring eight is blown into it, preheating the special steel valves that need to be processed later. This achieves the goal of making full use of the waste heat of high-temperature flue gas, improving energy utilization, shortening the heating time of subsequent heat treatment, and reducing the thermal stress generated by the valves due to rapid heating, thereby improving product quality and processing efficiency.

[0013] Compared with the prior art, the present invention achieves gas exchange inside the heat treatment chamber without the need for a special extraction pump by cooperating with the heat treatment components, gas transmission components and circulation components of the heat treatment device for special steel valves during the use of the device. The exhaust gas is used to heat the newly injected inert gas, thereby reducing the overall production cost of the device and improving the heat utilization during use, thus improving the economic performance of the device. Compared with the prior art, the present invention, through the heat treatment components, gas transmission components, circulation components and treatment components of the heat treatment device for special steel valves, achieves the cyclic up and down movement of the moving rod and sliding fan blades through the cooperation between the above structures during the use of the device, thereby accelerating the gas flow inside the heat treatment box and avoiding the problem of uneven temperature in some parts of the heat treatment box. Compared with existing technologies, this invention utilizes a heat treatment device for special steel valves, comprising a heat treatment component, a gas transmission component, a circulation component, a transport component, and a processing component. While the first batch of special steel valves in the storage box is undergoing heat treatment, the second batch of special steel valves can be placed on the end face of another moving block on the transport component. A motor is then used to move this block below the moving plate, allowing the hot gas flow from the connecting ring to be blown into the solenoid valve when it opens. This preheats the special steel valves that will be processed later, fully utilizing the waste heat of the high-temperature flue gas, improving energy efficiency, shortening the heating time for subsequent heat treatment, and reducing the thermal stress generated by the valves due to rapid heating, thereby improving product quality and processing efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is one of the cross-sectional structural schematic diagrams of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 for Figure 3 Enlarged structural diagram at point C; Figure 6 This is a second cross-sectional structural schematic diagram of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point D; Figure 8 This is a schematic diagram of the transport component structure in this invention.

[0015] In the diagram: 1. Base; 2. Controller; 3. Transport assembly; 301. Mounting frame; 302. Motor; 303. Lead screw; 304. Moving block; 4. Heat treatment component; 401. Heat treatment box; 402. Pulling frame; 403. Electric telescopic rod; 404. Moving plate; 5. Gas supply assembly; 501. Gas storage tank one; 502. Connecting pipe one; 503. Solenoid valve one; 504. Air pump; 505. Connecting pipe two; 506. Connecting pipe three; 507. Connecting pipe four; 6. Circulation assembly; 601. Circulation pipe; 602. Mounting bracket; 603. Connecting pipe; 604. Solenoid valve II; 605. Connecting pipe V; 606. Connecting pipe VI; 607. Solenoid valve V; 7. Processing component; 701. Gas storage tank II; 702. Connecting pipe VII; 703. Solenoid valve III; 704. Mounting cylinder; 705. Moving rod; 706. Connecting ring I; 707. Fixing ring; 708. Sliding fan blade; 709. Connecting ring II; 710. Connecting ring VIII; 711. Solenoid valve IV; 9. Storage component; 901. Storage box; 902. Connecting plate. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] Example: Please refer to Figure 1 - Figure 8The heat treatment device for special steel valves shown includes a base 1, a heat treatment component 4 is provided on the end face of the base 1, a gas conveying component 5 is installed on the end face of the heat treatment component 4 for conveying inert gas, a circulation component 6 is installed on the heat treatment component 4 for heating the inert gas with waste gas, a processing component 7 is installed between the end face of the base 1 and the circulation component 6 for agitating the interior of the heat treatment component 4 with waste gas to accelerate the gas flow inside the heat treatment component 4, a transport component 3 is installed on the end face of the base 1 for placing a storage component 9, and a controller 2 is provided on the end face of the base 1. The circulation assembly 6 includes a circulation pipe 601, and the heat treatment component 4 includes a heat treatment box 401. The heat treatment box 401 is fixedly installed on the end face of the base 1. A mounting bracket 602 is symmetrically installed on the end face of the heat treatment box 401, and the circulation pipe 601 is inserted through the mounting bracket 602. One end of the mounting bracket 602 is connected to the interior of the heat treatment chamber 401, and the other end of the mounting bracket 602 is connected to the outer wall of the heat treatment chamber 401, but is not connected to the interior of the heat treatment chamber 401. During the use of the device, air circulation fans can be added to the production workshop where the device is placed to prevent the workshop from being filled with inert gas, which could lead to safety accidents.

[0018] In this embodiment, specific references Figure 1 - Figure 4 The gas supply assembly 5 includes a gas storage tank 501 and a gas pump 504. The gas storage tank 501 is fixedly installed on the end face of the heat treatment box 401. A connecting pipe 502 is provided on the gas storage tank 501. The end of the connecting pipe 502 away from the gas storage tank 501 is connected to the air inlet of the gas pump 504. The air outlet of the gas pump 504 is connected to a connecting pipe 505. The end of the connecting pipe 505 away from the gas pump 504 is connected to a connecting pipe 506. The connecting pipe 506 is shaped like a "U". The two ends of the connecting pipe 506 are respectively connected to a connecting pipe 507. The connecting pipe 507 is inserted inside the circulation pipe 601. The end of connecting pipe 4 507 away from connecting pipe 3 506 passes through heat treatment box 401 and is connected to the inner cavity of heat treatment box 401; The air pump 504 is fixedly installed on the end face of the heat treatment chamber 401; In the process of using the device, the design of the air pump 504 achieves the function of replacing the extraction pump by injecting air into the heat treatment box 401 to expel the original air and replace the air in the heat treatment box 401.

[0019] In this embodiment, specific references Figure 1 - Figure 8A connecting pipe 603 is provided on the outer wall of the circulation pipe 601 away from the outer wall, and the connecting pipe 603 connects the circulation pipe 601 and the inner cavity of the heat treatment box 401. A solenoid valve 604 is installed on the outer wall of the connecting pipe 603, and a connecting pipe 605 connects the two circulation pipes 601. The bottom surface of the connecting pipe 605 is connected to the connecting pipe 606. The outer wall of the connecting pipe 606 is equipped with the solenoid valve 607. The processing component 7 includes the gas storage tank 701. The gas storage tank 701 is located on the end face of the base 1. The side wall of the gas storage tank 701 is equipped with the connecting pipe 702. The connecting pipe 702 is equipped with the solenoid valve 703. The end face of the base 1 is provided with an installation cylinder 704, which penetrates the bottom of the heat treatment box 401 and the two cylinders are connected to the inner cavity of the heat treatment box 401. A movable rod 705 is slidably installed in the mounting cylinder 704. A connecting ring 706 is installed on the lower outer wall of the movable rod 705. A fixing ring 707 is installed on the upper inner cavity of the mounting cylinder 704. A connecting ring 709 is installed on the upper side wall of the movable rod 705. The fixed ring 707 is located between the second connecting ring 709 and the first connecting ring 706. Sliding fan blades 708 are symmetrically installed on the upper side wall of the moving rod 705. The eighth connecting ring 710 is installed on the side wall of the mounting cylinder 704. The fourth solenoid valve 711 is installed on the outer wall of the eighth connecting ring 710. The eighth connecting ring 710 faces the position of the transport component 3. During the heat treatment process of the special steel valve in the heat treatment box 401, the solenoid valve 3 703 is opened, and then the high pressure gas in the gas storage tank 2 701 is transported from the connecting pipe 702 to the mounting cylinder 704, and pushes the moving rod 705 and the sliding fan blade 708 to move upward. Subsequently, solenoid valve 3 703 closes and solenoid valve 4 711 opens to release pressure inside mounting cylinder 704. Then, under the action of gravity, moving rod 705 drives sliding fan blade 708 to descend. Solenoid valve 3 703 and solenoid valve 4 711 open and close alternately, so as to drive moving rod 705 and sliding fan blade 708 to move up and down in a cycle, thereby accelerating the gas flow inside heat treatment chamber 401 and avoiding the problem of uneven temperature in some parts of heat treatment chamber 401. Furthermore, the thickness of the sliding fan blade 708 can be set within one centimeter. The thinner thickness allows the sliding fan blade 708 to swing when moving up and down, further enhancing the interaction of airflow inside the heat treatment chamber 401.

[0020] In this embodiment, specific references Figure 1 - Figure 8An electric telescopic rod 403 is installed on the end face of the heat treatment box 401. The telescopic end of the electric telescopic rod 403 passes through the end face of the heat treatment box 401 and extends into the inner cavity of the heat treatment box 401. A movable plate 404 is connected to the end of the telescopic shaft of the heat treatment box 401. A pull frame 402 is symmetrically installed on the bottom surface of the movable plate 404, and the pull frame 402 is in the shape of an "L". During the loading process, the first pull frame 402 is located below the heat treatment box 401, and the transport component 3 is used to move the storage box 901 between the two pull frames 402. The bent part of the pull frame 402 is located above the connecting plate 902, so that the storage component 9 can be moved upward when the pull frame 402 moves upward.

[0021] In this embodiment, specific references Figure 1 - Figure 8 The transport component 3 includes a mounting frame 301. The mounting frame 301 is fixedly mounted on the end face of the base 1. A lead screw 303 is rotatably mounted in the inner cavity of the mounting frame 301. Two moving blocks 304 are threadedly connected to the lead screw 303. A motor 302 is mounted on the outer wall of the mounting frame 301. The power output shaft of the motor 302 passes through the mounting frame 301 and is fixedly connected to the lead screw 303. The storage component 9 is placed on the end face of the movable block 304. The storage component 9 includes a storage box 901, and connecting plates 902 are fixedly installed on the left and right sides of the storage box 901 respectively. Both the storage box 901 and the pull-out rack 402 have multiple holes. The motor 302 drives the lead screw 303 to rotate, thereby moving the moving block 304 and the storage box 901 below the moving plate 404. At this time, the connecting plate 902 will be located above the bend of the pulling frame 402.

[0022] A method of using a heat treatment apparatus for special steel valves. S1. Before using the device, first check whether the controller 2 controls the electrical components such as air pump 504, solenoid valve 1 503, solenoid valve 2 604, solenoid valve 3 703 and fixed ring 707 normally. S2. Then place the storage box 901 with the valve on the end face of the moving block 304, and start the motor 302 to drive the lead screw 303 to rotate, thereby moving the moving block 304 and the storage box 901 to the bottom of the moving plate 404. At this time, the connecting plate 902 will be located above the bend of the pulling frame 402. S3. Then, the electric telescopic rod 403 is activated to move the moving plate 404 and the pulling frame 402 upward until the storage box 901 closes the bottom opening of the heat treatment box 401. S4. To avoid oxidation and decarburization of special steel valves, it is necessary to further reduce the oxygen content inside the heat treatment chamber 401. At this time, the air pump 504 is started and the solenoid valve 1 503 is opened. Then, the inert gas in the air storage tank 1 501 is transferred from the air storage tank 1 501, the solenoid valve 1 503, the air pump 504, the connecting pipe 2 505, the connecting pipe 3 506 and the connecting pipe 4 507 to the heat treatment chamber 401. S5. During this process, the gas volume in the heat treatment box 401 increases, and then the original gas in the heat treatment box 401 will be compressed from the other side into the circulation pipe 601. The heat carried by the original gas in the circulation pipe 601 will come into contact with the connecting pipe 507, thereby heating the inert gas in the connecting pipe 507 and realizing the utilization of waste gas. Furthermore, it is necessary to close solenoid valve 2 604 and open solenoid valve 5 607, so that the exhaust gas is transferred to storage tank 2 701 for collection. S6. After a period of time, the oxygen content in the heat treatment chamber 401 will decrease. At this time, close solenoid valve 5 607 and open solenoid valve 2 604. At this time, choose whether to increase the gas pressure in the heat treatment chamber 401 according to actual needs. If necessary, keep solenoid valve 1 503 open and air pump 504 running. If not needed, close solenoid valve 503 and stop air pump 504; S7. Further, during the heat treatment of the special steel valve in the heat treatment box 401, the solenoid valve 3 703 is opened, and then the high-pressure gas in the gas storage tank 2 701 is transported from the connecting pipe 702 to the mounting cylinder 704, and pushes the moving rod 705 and the sliding fan blade 708 to move upward. Subsequently, solenoid valve 3 703 closes and solenoid valve 4 711 opens to release pressure inside mounting cylinder 704. Then, under the action of gravity, moving rod 705 drives sliding fan blade 708 to descend. Solenoid valve 3 703 and solenoid valve 4 711 open and close alternately, so as to drive moving rod 705 and sliding fan blade 708 to move up and down in a cycle, thereby accelerating the gas flow inside heat treatment chamber 401 and avoiding the problem of uneven temperature in some parts of heat treatment chamber 401. S8. Furthermore, when the special steel valves in the first batch of storage boxes 901 are undergoing heat treatment, the second batch of special steel valves can be placed on the end face of another moving block 304 on the transport component 3, and the motor 302 can be used to rotate and move it to the bottom of the moving plate 404. When the solenoid valve 711 is opened, the hot airflow discharged from the connecting ring 710 is blown into it to preheat the special steel valves that need to be processed later. This achieves the purpose of making full use of the waste heat of high temperature flue gas, improving energy utilization, shortening the heating time of subsequent heat treatment, and reducing the thermal stress generated by the valves due to rapid heating, thereby improving product quality and processing efficiency.

[0023] The controller 2 used in this invention uses existing electrical equipment such as air pump 504, solenoid valve 503, solenoid valve 604, solenoid valve 703, and fixed ring 707. All of these components are known existing electrical devices and can be purchased and used directly on the market. Their structure, circuit, and control principle are all known existing technologies. Therefore, the structure, circuit, and control principle of the controller 2 for air pump 504, solenoid valve 503, solenoid valve 604, solenoid valve 703, and fixed ring 707 will not be described in detail here.

[0024] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat treatment apparatus for special steel valves, comprising a base (1), characterized in that: A heat treatment component (4) is provided on the end face of the base (1). An air delivery component (5) is fitted and installed on the end face of the heat treatment component (4). The air delivery component (5) is used to deliver inert gas. A circulation component (6) is fitted and installed on the heat treatment component (4). The circulation component (6) is used to heat the inert gas by using waste gas. A treatment component (7) is fitted and installed between the end face of the base (1) and the circulation component (6). The treatment component (7) uses waste gas to stir the inside of the heat treatment component (4), thereby accelerating the gas flow inside the heat treatment component (4). A transportation component (3) is installed on the end face of the base (1). A storage component (9) is placed on the transportation component (3). A controller (2) is provided on the end face of the base (1); The circulation component (6) includes a circulation pipe (601). The heat treatment component (4) includes a heat treatment box (401). The heat treatment box (401) is fixedly installed on the end face of the base (1). Mounting frames (602) are symmetrically installed on the end face of the heat treatment box (401). The circulation pipe (601) is inserted through the mounting frames (602); One end of the mounting frame (602) is connected to the inside of the heat treatment box (401), and the other end of the mounting frame (602) is connected to the outer wall of the heat treatment box (401) and is not connected to the inside of the heat treatment box (401).

2. The heat treatment apparatus for special steel valves according to claim 1, characterized in that: The air delivery component (5) includes a first gas storage tank (501) and an air pump (504). The first gas storage tank (501) is fixedly installed on the end face of the heat treatment box (401). A first connecting pipe (502) is provided on the first gas storage tank (501). The end of the first connecting pipe (502) far from the first gas storage tank (501) is connected to the air inlet of the air pump (504). The air outlet of the air pump (504) is connected to a second connecting pipe (505). The end of the second connecting pipe (505) far from the air pump (504) is connected to a third connecting pipe (506).

3. The heat treatment apparatus for special steel valves according to claim 2, characterized in that: The third connecting pipe (506) is in a "U" shape. The two ends of the third connecting pipe (506) are respectively connected to a fourth connecting pipe (507). The fourth connecting pipe (507) is inserted into the inside of the circulation pipe (601); The end of the fourth connecting pipe (507) far from the third connecting pipe (506) penetrates through the heat treatment box (401) and is connected to the inner cavity of the heat treatment box (401); The air pump (504) is fixedly installed on the end face of the heat treatment box (401).

4. A heat treatment apparatus for special steel valves according to claim 3, characterized in that: A communicating pipe (603) is provided on the outer wall of the circulation pipe (601) far from. The communicating pipe (603) connects the circulation pipe (601) and the inner cavity of the heat treatment box (401); A second solenoid valve (604) is provided on the outer wall of the communicating pipe (603). A fifth connecting pipe (605) is connected between the two circulation pipes (601); A sixth connecting pipe (606) is connected to the bottom surface of the fifth connecting pipe (605). A fifth solenoid valve (607) is provided on the outer wall of the sixth connecting pipe (606).

5. A heat treatment apparatus for special steel valves according to claim 4, characterized in that: The processing component (7) includes a second gas storage tank (701), which is disposed on the end face of the base (1). A connecting pipe (702) is provided on the side wall of the second gas storage tank (701), and a solenoid valve (703) is provided on the connecting pipe (702). The end face of the base (1) is provided with an installation cylinder (704), which penetrates the bottom of the heat treatment box (401) and connects to the inner cavity of the heat treatment box (401). A movable rod (705) is slidably installed in the mounting cylinder (704). A connecting ring one (706) is installed on the lower outer wall of the movable rod (705). A fixing ring (707) is installed on the upper inner cavity of the mounting cylinder (704). A connecting ring two (709) is installed on the upper side wall of the movable rod (705). The fixing ring (707) is located between the second connecting ring (709) and the first connecting ring (706).

6. A heat treatment apparatus for special steel valves according to claim 5, characterized in that: Sliding fan blades (708) are symmetrically installed on the upper side wall of the moving rod (705), and a connecting ring eight (710) is installed on the side wall of the mounting cylinder (704). A solenoid valve four (711) is installed on the outer wall of the connecting ring eight (710), and the connecting ring eight (710) faces the position of the transport component (3).

7. A heat treatment apparatus for special steel valves according to claim 6, characterized in that: An electric telescopic rod (403) is installed on the end face of the heat treatment box (401). The telescopic end of the electric telescopic rod (403) passes through the end face of the heat treatment box (401) and extends into the inner cavity of the heat treatment box (401). A movable plate (404) is connected to the end of the telescopic shaft of the heat treatment box (401). The bottom surface of the movable plate (404) is symmetrically equipped with a pull frame (402), which is "L" shaped.

8. A heat treatment apparatus for special steel valves according to claim 7, characterized in that: The transport component (3) includes a mounting frame (301), the mounting frame (301) is fixedly mounted on the end face of the base (1), a lead screw (303) is rotatably mounted in the inner cavity of the mounting frame (301), and two moving blocks (304) are threadedly connected to the lead screw (303). A motor (302) is installed on the outer wall of the mounting frame (301). The power output shaft of the motor (302) passes through the mounting frame (301) and is fixedly connected to the lead screw (303). The storage component (9) is placed on the end face of the moving block (304). The storage component (9) includes a storage box (901), and connecting plates (902) are fixedly installed on the left and right sides of the storage box (901). Both the storage box (901) and the pull frame (402) have multiple holes.

9. The method of using the heat treatment apparatus for special steel valves according to any one of claims 1-8, characterized in that: S1. Before using the device, first check whether the controller (2) controls the electrical components such as the air pump (504), solenoid valve one (503), solenoid valve two (604), solenoid valve three (703) and the fixed ring (707) normally; S2. Then place the storage box (901) with the valve on the end face of the moving block (304), and start the motor (302) to drive the lead screw (303) to rotate, thereby moving the moving block (304) and the storage box (901) to the bottom of the moving plate (404). At this time, the connecting plate (902) will be located above the bend of the pulling frame (402). S3. Then start the electric telescopic rod (403) to drive the moving plate (404) and the pulling frame (402) to move upward until the storage box (901) closes the bottom opening of the heat treatment box (401); S4. In order to avoid oxidation and decarburization of special steel valves, it is necessary to further reduce the oxygen content inside the heat treatment box (401). At this time, the air pump (504) is started and the solenoid valve one (503) is in the open state. Then, the inert gas in the air storage tank one (501) is transferred from the air storage tank one (501), the solenoid valve one (503), the air pump (504), the connecting pipe two (505), the connecting pipe three (506) and the connecting pipe four (507) to the heat treatment box (401). S5. During this process, the gas volume in the heat treatment box (401) increases, and then the original gas in the heat treatment box (401) will be compressed from the other side into the circulation pipe (601), and the heat carried by the original gas in the circulation pipe (601) will come into contact with the connecting pipe four (507), thereby heating the inert gas in the connecting pipe four (507) to realize the utilization of waste gas; Furthermore, it is necessary to close solenoid valve two (604) and open solenoid valve five (607) so that the exhaust gas is transferred to storage tank two (701) for collection; S6. After a period of time, the oxygen content in the heat treatment box (401) will decrease. At this time, close the solenoid valve five (607) and open the solenoid valve two (604). At this time, choose whether to increase the gas pressure in the heat treatment box (401) according to actual needs. If necessary, keep the solenoid valve one (503) open and the air pump (504) running. If not needed, close solenoid valve 1 (503) and stop air pump (504); S7. Further, during the heat treatment of the special steel valve in the heat treatment box (401), the solenoid valve three (703) is opened, and then the high pressure gas in the gas storage tank two (701) is transported from the connecting pipe seven (702) to the mounting cylinder (704), and pushes the moving rod (705) and the sliding fan blade (708) to move upward. Subsequently, solenoid valve three (703) closes and solenoid valve four (711) opens to release pressure inside the mounting cylinder (704). Then, under the action of gravity, the moving rod (705) drives the sliding fan blade (708) to descend. Solenoid valve three (703) and solenoid valve four (711) open and close alternately, thereby driving the moving rod (705) and the sliding fan blade (708) to move up and down in a cycle, thereby accelerating the gas flow inside the heat treatment box (401) and avoiding the problem of uneven temperature in some parts of the heat treatment box (401). S8. Furthermore, when the special steel valves in the first batch of storage boxes (901) are heat-treated, the second batch of special steel valves can be placed on the end face of another moving block (304) on the transport component (3), and moved to the underside of the moving plate (404) by the rotation of the motor (302), so that when the solenoid valve four (711) is opened, the hot airflow discharged from the connecting ring eight (710) is blown into it, and the special steel valves that need to be processed later are preheated. This achieves the purpose of making full use of the waste heat of high temperature flue gas, improving energy utilization, shortening the heating time of subsequent heat treatment, and reducing the thermal stress generated by the valve due to rapid heating, thereby improving product quality and processing efficiency.

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