Heat treatment device for steam turbine steel casting production
By designing a steam turbine cast steel component heat treatment device including a heating flow guide and a circulating air chamber, the problem of uneven heat treatment in large cast steel components is solved, and uniform heating and stress removal of castings are achieved.
Patent Information
- Application Number
- CN202510493122.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2025-06-27
AI Technical Summary
Large cast steel parts in steam turbines are prone to uneven heat treatment during heat treatment, resulting in uneven stress elimination.
A heat treatment device for the production of steel castings of steam turbines is designed, including furnace body, lifting track, furnace door, conveying platform, heating mechanism, furnace top, heating flow guide and circulating air chamber. By setting up a heating flow guide and a circulation air chamber, the air flow inside the furnace body is circulated to ensure that the castings are uniformly heated.
Through this device, uniform heating of cast steel parts can be achieved, uneven stress elimination problem caused by uneven heating is avoided, and the efficiency and quality of heat treatment are improved.
Smart Images
Figure CN120210486A_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure relate to the technical field of casting heat treatment, and more specifically, to a heat treatment device for the production of steam turbine cast steel parts. Background Art
[0002] The cast steel parts in a steam turbine are key components that withstand high temperature, high pressure, and complex stresses. Components such as cylinders and nozzles in a steam turbine are made by casting. After casting, the cast parts need to be heat-treated for homogenization to eliminate the internal stresses, and then the shape is corrected through machining to obtain cast steel parts with the required shape and hardness. Cylinders and nozzles are both large-sized components. When heat-treating them, large heat treatment furnaces are required. During heat treatment, the temperature needs to be raised step by step, and insulation is carried out for a certain period of time when the temperature reaches a certain stage, successively completing pre-treatment, diffusion annealing, normalizing, and other processes. To avoid deformation of the components during heat treatment, the heat treatment furnace needs to be heated evenly.
[0003] Currently, when heat-treating steam turbine cast steel parts, trolley-type resistance furnaces are mostly used. The furnace door of the trolley-type resistance furnace is lifted by a lifting device. The inside of the trolley-type resistance furnace is provided with a heating device, and the cast steel parts are conveyed into the trolley-type resistance furnace through a slide rail for heating. In a traditional trolley-type resistance furnace, the inside of the furnace is heated by multiple heating devices arranged on the inner wall. However, the heating devices are evenly arranged in the furnace, and the distances from the castings are different. At the same time, when feeding into the furnace, multiple cast steel parts are mostly stacked to increase the number of castings heat-treated at one time, resulting in the possibility that the cast steel parts may be heated from the outside to the inside by the heating devices on the inner wall of the furnace, making it easy for the castings placed inside and large castings to have uneven heating, resulting in uneven stress elimination of the castings. Summary of the Invention
[0004] To overcome the above defects, embodiments of the present disclosure provide a heat treatment device for the production of steam turbine cast steel parts, which solves the technical problem of uneven heating that easily occurs when heat-treating large cast steel parts on a steam turbine in related technologies.
[0005] According to one aspect, at least one embodiment of the present disclosure provides a heat treatment device for the production of steam turbine cast steel parts, including a furnace body, a lifting track, and a furnace door. The lifting track is vertically fixedly connected to one side of the furnace body, and the furnace door is slidably connected to the lifting track. A slideway is fixedly arranged at the bottom of the furnace body. It further includes a conveying platform, a heating mechanism, a furnace top, heating guide vanes, and a circulating air cavity. The conveying platform is slidably connected to the slideway, and a support frame mechanism for placing cast steel parts is fixedly connected to the conveying platform. The support frame mechanism is used to support multiple cast steel parts and at the same time guide the air flow to circulate around the cast steel parts. The heating mechanism is arranged on the inner side wall of the furnace body, on the side of the furnace door close to the support frame mechanism, and is used to uniformly heat the interior of the furnace body. The furnace top is arranged at the top of the furnace body. There are multiple heating guide vanes, and multiple heating guide vanes are slidably connected to the furnace top. The circulating air cavity is fixedly connected to the center of the furnace top, and a centrifugal fan is arranged in the circulating air cavity. The centrifugal fan is used to drive the air flow in the furnace body to circulate.
[0006] The support frame mechanism includes a support base, a tree-shaped frame body, a tree-shaped frame body, a plug-in slot, and a plug-in seat. There are multiple support bases, and multiple support bases are fixedly connected in a circle on the conveying platform. The tree-shaped frame body is fixedly connected to multiple support bases. The tree-shaped frame body is fixedly connected by multiple partitions, and multiple partitions are arranged in a circle. There are multiple plug-in slots, and multiple plug-in slots are equally spaced on the partitions. There are multiple plug-in seats, and the plug-in seats are detachably arranged in the plug-in slots. Cast steel parts can be placed on the support base and the plug-in seat. There is a gap between the cast steel parts placed on the support base and the conveying platform, and the gap is used for air flow.
[0007] The heating mechanism includes a first heating wire, a second heating wire, and a third heating wire. There are multiple first heating wires, and multiple first heating wires are respectively fixedly connected to the side wall of the furnace body and the center of the furnace door. There are multiple second heating wires, and multiple second heating wires are respectively fixedly connected to the furnace door and the side of the furnace body opposite to the furnace door. The second heating wires are arranged on both sides of the first heating wires. The third heating wire is fixedly connected to each of the heating guide vanes.
[0008] The centrifugal fan includes a motor and a centrifugal impeller. The motor is fixedly installed on the furnace top, and the centrifugal impeller is arranged in the center of the circulating air cavity. The centrifugal impeller is connected to the output end of the motor.
[0009] The circulating air cavity is arranged in a disc shape, and an annular opening is formed at the edge of the circulating air cavity. An air inlet port is formed on the lower side of the circulating air cavity, and the air inlet port is arranged at the center of the circulating air cavity and is aligned with the center of the centrifugal impeller blade.
[0010] Two strip-shaped grooves 1 are arranged on the furnace top. The strip-shaped grooves 1 are arranged on two sides of the furnace top adjacent to the furnace door. A plurality of strip-shaped grooves 2 are arranged on the furnace top. Each strip-shaped groove 2 is arranged on the side of both ends of each strip-shaped groove 1, and the strip-shaped grooves 2 are arranged obliquely.
[0011] A sliding column 1 and a sliding column 2 are arranged on the heating guide vane. The sliding column 1 and the sliding column 2 are respectively slidably arranged in the strip-shaped groove 1 and the strip-shaped groove 2. A plurality of driving cylinders are fixedly installed on the furnace top, and each sliding column 1 is connected to the output end of a driving cylinder.
[0012] When the heating guide vane is configured to be in an inclined state, the heating guide vane can block the heating wire 2, and a plurality of heating wires 1 and a plurality of heating wires 3 are circumferentially arranged around the conveying platform.
[0013] The beneficial effects of the embodiments of the present disclosure are as follows: 1. In the present invention, by arranging the heating guide vane, the rotation of the four heating guide vanes can adjust the inside of the furnace body into an octagon. Compared with a rectangle, the distance between the heating wire and the cylinder can be made more uniform, which is similar to the internal shape of a circular heat treatment furnace. However, circular heat treatment furnaces all need to use a hoisting method to move the castings, and at the same time need to be buried underground, with high costs and inconvenient placement of the castings. By setting the deformation in the furnace body, uniform heating can be simply achieved. 2. In the present invention, by arranging the circulating air cavity, the air in the furnace body can be driven to move upward in the center of the furnace body, and then the air diffuses towards the periphery of the furnace body. After the air is heated by the heating wire 1 and the heating wire 3, it enters the cylinder through the gap between the support bases, realizing the circulation of the air, so that the steel casting can be uniformly heated. 3. In the present invention, by arranging the circulating air cavity and the centrifugal fan, the air flow can be evenly circulated inside the furnace body, so that the heat is evenly diffused into the furnace body. By arranging the heating guide vane, when heat treating circular castings such as cylinders, the inside of the furnace body can be adjusted into a structure similar to a circle, so that the cylinder is heated more evenly. Description of the Drawings
[0014] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present disclosure and these drawings.
[0015] Figure 1 It is a schematic structural diagram of the whole in the present invention; Figure 2 It is a schematic structural diagram of another perspective of the whole in the present invention; Figure 3 It is a schematic partial internal sectional structural diagram inside the furnace body in the present invention; Figure 4 It is a schematic structural diagram of the support base and the tree-shaped frame in the present invention; Figure 5 It is a schematic partial internal structural diagram of the cooperation between the circulating air cavity and the tree-shaped frame in the present invention; Figure 6 It is a schematic partial sectional structural diagram of another perspective inside the furnace body in the present invention; Figure 7 It is a schematic internal sectional structural diagram of the furnace top in the present invention.
[0016] In the figure: 1. Furnace body; 2. Lifting track; 3. Furnace door; 4. Slideway; 5. Conveyor platform; 6. Furnace top; 7. Heating guide vane; 8. Circulating air cavity; 9. Support base; 10. Tree-shaped frame; 11. Insertion slot; 12. Insertion seat; 13. Heating wire one; 14. Heating wire two; 15. Heating wire three; 16. Motor; 17. Centrifugal impeller; 18. Annular opening; 19. Air inlet port; 20. First strip-shaped groove; 21. Second strip-shaped groove; 22. First sliding column; 23. Second sliding column; 24. Driving cylinder. Detailed implementation manners
[0017] The following will further elaborate on the present disclosure in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than limiting the present disclosure.
[0018] To make the drawings concise, only the parts related to the disclosure are schematically shown in each drawing, and they do not represent the actual structure of the product. Additionally, to make the drawings concise and easy to understand, in some drawings, for components with the same structure or function, only one of them is schematically shown, or only one of them is marked. In this document, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".
[0019] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "install", "connect", and "link" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.
[0020] In this disclosure, unless otherwise clearly stipulated and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.
[0021] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this disclosure.
[0022] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0023] Such as Figures 1 to 7As shown in the figure, it shows a heat treatment device for the production of steam turbine cast steel parts in an embodiment of the present disclosure, including a furnace body 1, a lifting track 2 and a furnace door 3. The lifting track 2 is vertically fixedly connected to one side of the furnace body 1. The furnace door 3 is slidably connected to the lifting track 2. The furnace door 3 is driven by an external lifting device to move vertically on the lifting track 2. A slideway 4 is fixedly arranged at the bottom of the furnace body 1. It further includes a conveying platform 5, a heating mechanism, a furnace top 6, heating guide vanes 7 and a circulating air cavity 8. The conveying platform 5 is slidably connected to the slideway 4. A support frame mechanism for placing cast steel parts is fixedly connected to the conveying platform 5. The support frame mechanism is used to support multiple cast steel parts and at the same time guide the air flow to circulate around the cast steel parts. The heating mechanism is arranged on the inner side wall of the furnace body 1, on the side of the furnace door 3 close to the support frame mechanism. The heating mechanism is used to uniformly heat the inside of the furnace body 1. The furnace top 6 is arranged at the top of the furnace body 1. A plurality of heating guide vanes 7 are provided. The plurality of heating guide vanes 7 are slidably connected to the furnace top 6. Heat insulation layers are provided on the inner sides of the furnace top 6, the furnace body 1 and the furnace door 3. Heating wires one 13, heating wires two 14 and heating wires three 15 are all arranged on the heat insulation layers to prevent the heat inside the furnace body 1 from leaking out. The circulating air cavity 8 is fixedly connected to the center of the furnace top 6. A centrifugal fan is arranged in the circulating air cavity 8. The centrifugal fan is used to drive the air flow in the furnace body 1 to circulate. In the existing trolley-type resistance furnace, the inside is set to be rectangular, which is convenient for heat treatment of rectangular castings or placing multiple long-strip castings. However, when placing a circular cylinder block, the distances between different parts of the cylinder block and the heating wires are different, and there may be problems with different heating speeds. Therefore, by setting the heating guide vanes 7, the layout inside the furnace body 1 is transformed into a layout similar to a circle, making the heating more uniform. Then, the centrifugal fan and the circulating air cavity 8 are used to drive the air flow in the furnace body 1 to circulate, so that the castings in the center of the furnace body 1 can also be heated evenly, thereby achieving the purpose of uniform heating of the steam turbine cast steel parts inside the furnace body 1.
[0024] As Figures 2 to 4As shown in the figure, the support frame mechanism includes a support base 9, a tree-shaped frame 10, a tree-shaped frame 10, a plug-in slot 11 and a plug-in seat 12. There are multiple support bases 9, and the multiple support bases 9 are fixedly connected in a circle on the conveying platform 5. The tree-shaped frame 10 is fixedly connected to the multiple support bases 9. The tree-shaped frame 10 is fixedly connected by multiple partitions. The multiple partitions are arranged in a circle. There are multiple plug-in slots 11, and the multiple plug-in slots 11 are equidistantly opened on the partitions. There are multiple plug-in seats 12, and the plug-in seats 12 are detachably arranged on the plug-in slots 11. Steel castings can be placed on the support base 9 and the plug-in seat 12. There is a gap between the steel casting placed on the support base 9 and the conveying platform 5, and the gap is used for air flow. The support base 9 is supported by long strip-shaped steel. Large cylinder blocks can be placed on the support base 9, and there are gaps between the strip-shaped steels. The tree-shaped frame 10 is inside the large cylinder block. The plug-in seats 12 are inserted on the partitions of the tree-shaped frame 10, and smaller cylinder blocks can be placed on the plug-in seats 12. Multiple smaller cylinder blocks can be set according to the size of the cylinder block, and there are gaps between these cylinder blocks. The tree-shaped frame 10 is composed of partitions, and the partitions can guide the air flow so that the air flow vertically flows in the furnace body 1. Driven by the centrifugal fan, the air moves upward along the tree-shaped frame 10 in the center of the cylinder block and blows the air flow towards the inner wall of the furnace body 1. The air flow enters the inside of the cylinder block through the gap between the support bases 9, realizing the internal circulation of the air flow and uniformly heating each position of the cylinder block.
[0025] As Figures 3 to 6 shown, the heating mechanism includes a first heating wire 13, a second heating wire 14 and a third heating wire 15. There are multiple first heating wires 13, and the multiple first heating wires 13 are respectively fixedly connected to the side wall of the furnace body 1 and the center of the furnace door 3. There are multiple second heating wires 14, and the multiple second heating wires 14 are respectively fixedly connected to the furnace door 3 and the side of the furnace body 1 opposite to the furnace door 3. The second heating wires 14 are arranged on both sides of the first heating wires 13. The third heating wires 15 are fixedly connected to the heating guide vanes 7. When heat-treating castings in the steam turbine other than the cylinder block, if the castings are not circular, the heating guide vanes 7 can be kept parallel to the side wall of the furnace body 1. At this time, the second heating wires 14 are not blocked by the heating guide vanes 7, and at this time, uniform heating can be carried out through the first heating wires 13, the second heating wires 14 and the third heating wires 15. When the heating guide vanes 7 are configured to be in an inclined state, the heating guide vanes 7 can block the second heating wires 14. The multiple first heating wires 13 and the multiple third heating wires 15 are circumferentially arranged around the conveying platform 5. When heating the steel casting of the cylinder block, the heating guide vanes 7 slide to an inclined state, and the heating guide vanes 7 block the second heating wires 14. At this time, the second heating wires 14 do not need to be turned on, and the inside of the furnace body 1 can be heated through the first heating wires 13 and the third heating wires 15.
[0026] AsFigures 5 to 7 As shown in the figure, the centrifugal fan includes a motor 16 and a centrifugal impeller 17. The motor 16 is fixedly installed on the furnace top 6. The centrifugal impeller 17 is arranged in the center of the circulating air chamber 8. The centrifugal impeller 17 is connected to the output end of the motor 16. The circulating air chamber 8 is arranged in a disc shape. An annular opening 18 is provided at the edge of the circulating air chamber 8. An air inlet port 19 is provided on the lower side of the circulating air chamber 8. The air inlet port 19 is arranged in the center of the circulating air chamber 8 and is aligned with the center of the centrifugal impeller 17. The output end of the motor 16 drives the centrifugal impeller 17 to rotate, sucking air into the circulating air chamber 8 through the air inlet port 19. Under the action of the centrifugal impeller 17, the air is transported towards the annular opening 18, so that the air is evenly transported around the circulating air chamber 8. The air contacts and heats the inner wall of the furnace body 1 and the heating heat conducting sheet, and the air enters the cylinder at the support base 9 for circulation.
[0027] As Figures 6 to 7 shown in the figure, a first strip groove 20 and a second strip groove 21 are provided on the furnace top 6. There are two first strip grooves 20, which are provided on both sides of the furnace top 6 adjacent to the furnace door 3. There are multiple second strip grooves 21, which are provided on the furnace top 6. A second strip groove 21 is provided on the side of each end of the first strip groove 20. The second strip groove 21 is inclined. A first sliding column 22 and a second sliding column 23 are provided on the heating guide sheet 7. The first sliding column 22 and the second sliding column 23 are respectively slidably arranged in the first strip groove 20 and the second strip groove 21. A plurality of driving cylinders 24 are fixedly installed on the furnace top 6. Each first sliding column 22 is connected to the output end of a driving cylinder 24. The end of the second strip groove 21 far from the first strip groove 20 is inclined away from the first strip groove 20. When the driving cylinder 24 pushes the first sliding column 22, the second sliding column 23 can slide in the second strip groove 21 and drive the heating guide sheet 7 to rotate to an inclined state. The heating guide sheet 7 rotates to the two sides respectively adjacent to the two sides of the furnace body 1, or contacts the furnace body 1 and the furnace door 3. The furnace body 1, the furnace door 3 and the heating guide sheet 7 form an octagon. The tree-shaped frame 10 is arranged inside the furnace body 1. The first strip groove 20 and the second strip groove 21 are provided on the furnace top 6, and the first strip groove 20 and the second strip groove 21 are not communicated with the outside, so that the heat inside the furnace body 1 will not leak through the first strip groove 20 and the second strip groove 21.
[0028] In some examples, the cylinder blocks are placed on the support base 9 and the socket 12 in sequence according to their sizes. Then, the conveying platform 5 is sent into the furnace body 1 through the slideway 4. The furnace door 3 descends to seal the furnace body 1. At this time, the output end of the driving cylinder 24 shortens, pulling the first sliding column 22 to slide in the first strip-shaped groove 20, and the second sliding column 23 slides in the second strip-shaped groove 21, causing the heating guide vane 7 to rotate into an inclined state. At this time, the furnace body 1, the furnace door 3, and the heating guide vane 7 form an octagon. The output end of the motor 16 drives the centrifugal impeller 17 to rotate. The air flow moves upward in the cylinder block and enters the air inlet 19, and is conveyed around through the annular opening 18. After the air flow contacts and is heated by the first heating wire 13 and the third heating wire 15, it enters the cylinder block through the gap between the support bases 9, realizing the circulation of air and uniformly heating multiple casting cylinder blocks and the inside and outside of the cylinder block.
[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them. Although the present disclosure 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 disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and they should all be covered within the scope of the claims of the present disclosure.
Claims
1. A heat treatment device for producing steam turbine steel castings, comprising a furnace body (1), a lifting rail (2) and a furnace door (3), wherein the lifting rail (2) is vertically fixedly connected to one side of the furnace body (1), the furnace door (3) is slidably connected to the lifting rail (2), and a slideway (4) is fixedly provided at the bottom of the furnace body (1), characterized in that: Also includes: A conveying platform (5) is slidably connected to the slideway (4), and a support frame mechanism for placing steel castings is fixedly connected to the conveying platform (5), wherein the support frame mechanism is used to support a plurality of steel castings and guide airflow to circulate around the steel castings; A heating mechanism is arranged on the inner wall of the furnace body (1) and on a side of the furnace door (3) close to the support frame mechanism, the heating mechanism being used to uniformly heat the interior of the furnace body (1); A furnace top (6), the furnace top (6) being arranged on the top of the furnace body (1); A plurality of heating guide plates (7) are provided, and the plurality of heating guide plates (7) are slidably connected to the furnace top (6); A circulating air cavity (8) is fixedly connected to the center of the furnace top (6), and a centrifugal fan is arranged in the circulating air cavity (8), and the centrifugal fan is used to drive the airflow in the furnace body (1) to circulate.
2. A heat treatment device for producing steam turbine steel castings according to claim 1, characterized in that: The support frame mechanism comprises: A plurality of support bases (9) are provided, and the plurality of support bases (9) are fixedly connected to the conveying platform (5) in a circular shape; A tree-shaped frame body (10) is fixedly connected to the plurality of support bases (9), wherein the tree-shaped frame body (10) is composed of a plurality of partitions that are fixedly connected, and the plurality of partitions are arranged in a circle; A plurality of plug-in slots (11) are provided, and the plurality of plug-in slots (11) are arranged on the partition plate at equal intervals; A plurality of plug sockets (12) are provided, and the plug sockets (12) are detachably arranged on the plug slots (11), and steel castings can be placed on the support base (9) and the plug sockets (12).
3. A heat treatment device for producing steam turbine steel castings according to claim 2, characterized in that: A gap is left between the steel casting placed on the support base (9) and the conveying platform (5), and the gap is used for air flow.
4. A heat treatment device for producing steam turbine steel castings according to claim 3, characterized in that: The heating mechanism comprises: A plurality of heating wires (13) are provided, and the plurality of heating wires (13) are respectively fixedly connected to the side wall of the furnace body (1) and the center of the furnace door (3); A plurality of heating wires 2 (14) are provided, wherein the plurality of heating wires 2 (14) are respectively fixedly connected to the furnace door (3) and a side of the furnace body (1) opposite to the furnace door (3), and the heating wires 2 (14) are provided on both sides of the heating wire 1 (13); Heating wire three (15), the heating guide plate (7) is fixedly connected to the heating wire three (15).
5. A heat treatment device for producing steam turbine steel castings according to claim 4, characterized in that: The centrifugal fan comprises: A motor (16) fixedly mounted on the furnace top (6); A centrifugal blade (17) is arranged in the center of the circulating air chamber (8), and the centrifugal blade (17) is connected to the output end of the motor (16).
6. A heat treatment device for producing steam turbine steel castings according to claim 5, characterized in that: The circulating air chamber (8) is arranged in a disc shape, an annular opening (18) is provided at the edge of the circulating air chamber (8), an air inlet opening (19) is provided on the lower side of the circulating air chamber (8), the air inlet opening (19) is arranged at the center of the circulating air chamber (8), and the air inlet opening (19) is aligned with the center of the centrifugal blade (17).
7. A heat treatment device for producing steam turbine steel castings according to claim 6, characterized in that: The furnace top (6) is provided with: Two strip grooves (20) are provided, and the strip grooves (20) are provided on both sides of the furnace top (6) adjacent to the furnace door (3); There are a plurality of strip grooves 2 (21), each of which is provided on the furnace top (6). Each of the two ends of each strip groove 1 (20) is provided with a strip groove 2 (21), and the strip grooves 2 (21) are provided in an inclined manner.
8. A heat treatment device for producing steam turbine steel castings according to claim 7, characterized in that: The heating guide plate (7) is provided with a sliding column 1 (22) and a sliding column 2 (23), and the sliding column 1 (22) and the sliding column 2 (23) are respectively slidably arranged in the strip groove 1 (20) and the strip groove 2 (21), and a plurality of driving cylinders (24) are fixedly installed on the furnace top (6), and each of the sliding columns 1 (22) is connected to an output end of the driving cylinder (24).
9. A heat treatment device for producing steam turbine steel castings according to claim 8, characterized in that: When the heating guide plate (7) is configured such that, in an inclined state, the heating guide plate (7) can shield the second heating wire (14).
10. A heat treatment device for producing steam turbine steel castings according to claim 9, characterized in that: When the heating guide plate (7) is configured such that, in an inclined state, the plurality of heating wires one (13) and the plurality of heating wires three (15) circumferentially surround the conveying platform (5).