Preheating device for heat treatment of high-strength casting for wind power equipment

Abstract

The invention relates to the technical field of heat treatment processing of wind power equipment, in particular to a preheating device for heat treatment of a high-strength casting for wind power equipment, which comprises a preheating equipment support frame, a support bottom table, a conveying table, a casting, a clamping assembly, a preheating mechanism and an auxiliary assembly, mainly, a clamping assembly is used in cooperation with a preheating mechanism and an auxiliary assembly to preheat a casting, in the process, a telescopic clamping rod pushes a stable chuck to clamp the casting, the casting is conveyed to the position of a preheating equipment supporting frame through a conveying table, namely a preheating station, and then the casting is preheated. When the rotating motor is started to drive the casting to rotate, the casting is uniformly preheated through the preheating mechanism and the auxiliary assembly, the preheating work uniformity is improved, the position of the casting can be turned over when the casting is heated, the work flexibility is high, impurities can be removed when attached to the surface of the casting, the heating uniformity of the casting is improved, and the machining quality requirement is met.

Description

Technical Field

[0001] This invention relates to the field of heat treatment processing technology for wind power equipment, specifically a preheating device for heat treatment of high-strength castings for wind power equipment. Background Technology

[0002] Chinese patent document CN219136839U discloses a preheating device for casting processing. It features a transmission sleeve fixedly mounted on the top of a preheating base, which provides rotatable support for a conveyor sleeve and thus a conveyor belt. Several clamping brackets are fixedly mounted on the outside of the conveyor belt, supporting several casting support plates. A preheating box is fixedly mounted on the outside of the transmission sleeve, preheating the castings on top of the support plates. Heat shielding pads are fixedly mounted on both sides of the preheating box to prevent heat loss. To prevent excessive heat loss from the inside of the transmission tank, an adjusting bracket is fixedly installed inside the preheating chamber. Two connecting sleeves are then fixedly installed inside the adjusting bracket, providing rotational support for the adjusting screw. An extension frame is movably fitted inside one of the connecting sleeves, allowing the threaded sleeve inside the extension frame to engage with the adjusting screw. This enables the raising and lowering adjustment of the heating lamp support plate at the bottom of the extension frame. Furthermore, a preheating lamp is fixedly installed at the bottom of the heating lamp support plate, allowing adjustment of the preheating lamp's height. This facilitates preheating of different castings, accelerating the preheating efficiency.

[0003] In the above-mentioned solutions and existing technologies, the residual heat treatment of castings is generally carried out by baking with a heating device. During this process, the position of the casting cannot be rotated while it is heated, resulting in low work flexibility. Furthermore, when impurities adhere to the surface of the casting, it will also affect the uniformity of its heating, ultimately failing to meet the preheating requirements or requiring more time to meet the preheating requirements, which has a negative impact on the final processing quality and overall processing efficiency.

[0004] Therefore, we need a preheating device for heat treatment of high-strength castings for wind power equipment to solve the problem that the castings cannot be rotated when heated by existing preheating devices for heat treatment of high-strength castings, and to preheat the castings by rotating them. Summary of the Invention

[0005] The purpose of this invention is to provide a preheating device for heat treatment of high-strength castings for wind power equipment, which solves the problem that the castings cannot be rotated when heated in existing preheating devices for heat treatment of high-strength castings, and can rotate the castings for preheating.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a preheating device for heat treatment of high-strength castings for wind power equipment, comprising a preheating equipment support frame, a support base, a conveying platform, a casting and clamping components, a preheating mechanism, and auxiliary components; the preheating equipment support frame is connected to the support base, and the conveying platform is slidably connected to the support base; clamping components are equidistantly arranged on the conveying platform to securely clamp the casting; a preheating mechanism is connected to the inner side of the preheating equipment support frame, and the preheating mechanism is connected to the auxiliary components.

[0007] Preferably, the clamping assembly includes a support plate, a telescopic clamping rod, a rotary motor, and a stabilizing clamp; the support plate is equidistantly arranged on the conveying table, and a telescopic clamping rod is connected to one side of the support plate. One end of the telescopic clamping rod extends to the inner side of the support plate, and a rotary motor is connected to the end of the rod. A stabilizing clamp is connected to one end of the rotary motor, and the stabilizing clamp clamps the casting.

[0008] Preferably, the preheating mechanism includes a control cylinder, a connecting plate, a concave enclosure plate, heating pipes, a push-pull control rod, an arc-shaped support plate, an arc-shaped box, an extension protrusion, a hot air nozzle, and a nozzle. The control cylinder is located on the top of the preheating equipment support frame, with one end extending to the inside of the support frame and a connecting plate fixedly attached to its end. The connecting plate is fixedly connected to the concave enclosure plate by bolts. Heating pipes are equidistantly arranged on the inner wall of the concave enclosure plate. The push-pull control rod is connected to one side of the preheating equipment support frame, with one end extending to the inside of the support frame and an arc-shaped support plate fixedly attached to its end. The arc-shaped support plate is fixedly connected to the arc-shaped box by screws. Extension protrusions are symmetrically arranged on the outer wall of the arc-shaped box, and hot air nozzles are connected to the extension protrusions. Nozzles are equidistantly arranged on the inner wall of the arc-shaped box, and auxiliary components are provided on the inner wall of the arc-shaped box.

[0009] Preferably, the heating pipes are equidistantly arranged on both sides and the top side of the inner wall of the concave enclosure.

[0010] Preferably, the nozzles are arranged in an arc shape at equal intervals on the inner side wall of the arc-shaped box, and the nozzles are positioned corresponding to the extension protrusions.

[0011] Preferably, the auxiliary component includes an arc-shaped plate, connecting feet, cleaning strips, a first housing, an externally threaded connecting ring, a slag collection hole, an auxiliary curved surface, a second housing, and an internally threaded connecting ring. Connecting feet are symmetrically fixed at both ends of the arc-shaped plate, and the connecting feet are fixedly connected to the inner wall of the arc-shaped box by screws. Cleaning strips are equidistantly arranged on the arc-shaped plate. A first housing is fixedly arranged at one end of each cleaning strip. An externally threaded connecting ring is provided at the end of the first housing, and the externally threaded connecting ring and the internally threaded connecting ring are threaded together. The internally threaded connecting ring is located on the end face of the second housing. Both the second housing and the first housing are provided with slag collection holes, and an auxiliary curved surface is provided on the outer edge of the slag collection hole.

[0012] Preferably, the second housing and the first housing are connected to form an elliptical housing, and one of the elliptical housings is provided at the end of the cleaning strip.

[0013] Preferably, the auxiliary curved surface bends outward at the outer hole of the slag collection hole to facilitate the entry and collection of impurities.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention relates to a preheating device for heat treatment of high-strength castings used in wind power equipment. It primarily utilizes a combination of clamping components, a preheating mechanism, and auxiliary components to preheat the castings. During this process, a telescopic clamping rod pushes a stabilizing clamp to hold the casting. The casting is then conveyed to the preheating equipment support frame (the preheating station) via a conveyor table. Simultaneously, a rotary motor rotates the casting, while the preheating mechanism and auxiliary components uniformly preheat it, improving the uniformity of the preheating process and preventing impurities on the casting from negatively impacting the preheating process. The castings can be rotated when heated, offering high operational flexibility and ensuring uniform heating. Therefore, this design provides a preheating device for heat treatment of high-strength castings used in wind power equipment. The castings can be rotated when heated, offering high operational flexibility and allowing for the removal of impurities adhering to the casting surface, thus improving heating uniformity and meeting processing quality requirements. This has a positive impact on the overall processing efficiency and further solves the problem of existing preheating devices for high-strength castings not being able to rotate when heated, enabling preheating by rotating the castings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front side of the structure of the preheating device for heat treatment of high-strength castings for wind power equipment according to the present invention; Figure 2 This is a schematic diagram of the back side of the structure of the preheating device for heat treatment of high-strength castings for wind power equipment according to the present invention; Figure 3 This is a top view of the connection between the concave enclosure and the heating pipe structure in the preheating mechanism of the present invention; Figure 4 This is a bottom view of the connection between the concave enclosure and the heating pipe structure in the preheating mechanism of the present invention; Figure 5 This is a schematic diagram of the connection between the preheating mechanism and the auxiliary components of the present invention. Figure 6 This is a schematic diagram of the connection between the preheating mechanism and the auxiliary components of the present invention from the back side. Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the connection between the middle structures; Figure 8 This is a schematic diagram of the connection of the cleaning soft strip structure in the auxiliary component of the present invention; Figure 9 This is a schematic diagram of the replacement structure connection on the cleaning strip of the present invention; Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the connection of the middle structure.

[0016] In the diagram: 1. Preheating equipment support frame; 2. Support base; 3. Conveying table; 4. Casting; 5. Clamping assembly; 5. Support plate; 501. Telescopic clamping rod; 502. Rotary motor; 503. Stabilizing clamp; 504. Preheating mechanism; 6. Control cylinder; 601. Connecting plate; 602. Concave enclosure plate; 603. Heating pipe; 604. Push-pull control rod; 605. Arc-shaped bearing plate; 606. Arc-shaped box; 607. Extension protrusion; 608. Hot air nozzle; 609. Nozzle; 610. Auxiliary assembly; 7. Arc-shaped plate; 701. Connecting foot; 702. Cleaning strip; 703. First housing; 704. External threaded connecting ring; 705. Slag collection hole; 706. Auxiliary curved surface; 707. Second housing; 708. Internal threaded connecting ring; 709. Replacement structure; 8. Arc-shaped elastic scraper; 801. Auxiliary cotton ball; 802. Auxiliary cone; 803. Cleaning auxiliary protrusion; 804. Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.

[0022] Please see Figures 1-8 The present invention provides the following three preferred embodiments: Example

[0023] Please see Figures 1-2A preheating device for heat treatment of high-strength castings for wind power equipment includes a preheating equipment support frame 1, a support base 2, a conveying table 3, a casting 4, a clamping assembly 5, a preheating mechanism 6, and an auxiliary assembly 7. The preheating equipment support frame 1 is connected to the support base 2, and the conveying table 3 is slidably connected to the support base 2. The clamping assembly 5 is equidistantly arranged on the conveying table 3 to firmly clamp the casting 4. The preheating mechanism 6 is connected to the inner side of the preheating equipment support frame 1 and is connected to the auxiliary assembly 7. The clamping assembly 5 includes a support plate 501, a telescopic clamping rod 502, a rotary motor 503, and a stabilizing clamping plate 504. The support plate 501 is equidistantly arranged on the conveying table 3, and a telescopic clamping rod 502 is connected to one side of the support plate 501. The telescopic clamping rod 502 extends one end to the inner side of the support plate 501, and a rotary motor 503 is connected to the end of the rod. A stabilizing clamping plate 504 is connected to the other end of the rotary motor 503, which clamps the casting 4. The present invention mainly uses the cooperation between the clamping component 5, the preheating mechanism 6, and the auxiliary component 7 to preheat the casting 4. During this process, the telescopic clamping rod 502 pushes the stabilizing clamping plate 504 to clamp the casting 4. After the casting 4 is transported to the preheating equipment support frame 1 (i.e., the preheating station) by the conveyor table 3, the rotary motor 503 is started to drive the casting 4 to rotate. At the same time, the casting 4 is uniformly preheated by the preheating mechanism 6 and the auxiliary component 7, ensuring the uniformity of the preheating process.

[0024] To further address the problem that existing preheating devices for heat treatment of high-strength castings cannot rotate during heating, castings can be preheated by rotating them.

[0025] Example 2, based on Example 1: Please see Figures 3-6The preheating mechanism 6 here includes a control cylinder 601, a connecting plate 602, a concave surrounding plate 603, a heating pipe 604, a push-pull control rod 605, an arc-shaped bearing plate 606, an arc-shaped box 607, an extension protrusion 608, a hot air nozzle 609, and a nozzle 610. The control cylinder 601 is located on the top of the preheating equipment support frame 1, with one end extending into the inner side of the preheating equipment support frame 1, and the end is fixedly equipped with a connecting plate 602. The connecting plate 602 is connected to... The preheating equipment is fixedly connected to the concave enclosure 603 by bolts. Heating pipes 604 are equidistantly arranged on the inner side wall of the concave enclosure 603. The heating pipes 604 are equidistantly arranged on both sides and the top side of the inner side wall of the concave enclosure 603. A push-pull control rod 605 is connected to one side of the preheating equipment support frame 1, and one end of the push-pull control rod 605 extends into the inner side of the preheating equipment support frame 1. An arc-shaped bearing plate 606 is fixedly installed at the end. The arc-shaped bearing plate 606 is connected to the arc-shaped box 607 by screws. A fixed connection is provided. Symmetrical extension protrusions 608 are arranged on the outer wall of the arc-shaped box 607. Hot air nozzles 609 are connected to the extension protrusions 608. Nozzles 610 are equidistantly arranged on the inner wall of the arc-shaped box 607, and an auxiliary component 7 is provided on the inner wall of the arc-shaped box 607. The nozzles 610 are equidistantly arranged in an arc shape on the inner wall of the arc-shaped box 607, and their positions correspond to those of the extension protrusions 608. When the casting 4 reaches the preheating station, the control cylinder 601 pushes down. The concave enclosure 603 allows the heating pipes 604 located inside the concave enclosure 603 to heat the casting. At the same time, the push-pull control rod 605 located on one side of the preheating equipment support frame 1 pushes the arc-shaped box 607 to move, and the nozzles 610 on the inner wall of the arc-shaped box 607 blow hot air onto the casting 4. This process has two functions: firstly, it provides heating assistance to the casting 4, and secondly, it can remove dust and impurities from the casting 4.

[0026] To further address the problem that existing preheating devices for heat treatment of high-strength castings cannot rotate during heating, castings can be preheated by rotating them.

[0027] Example 3, based on Example 2: Please see Figure 7 The auxiliary component 7 here includes an arc-shaped plate 701, connecting feet 702, and cleaning strips 703; the two ends of the plate 701 are symmetrically fixed with connecting feet 702, which are fixedly connected to the inner side wall of the arc-shaped box 607 by screws, and the cleaning strips 703 are equidistantly arranged on the arc-shaped plate 701.

[0028] To further address the problem that existing preheating devices for heat treatment of high-strength castings cannot rotate during heating, castings can be preheated by rotating them.

[0029] Example 4: Based on Example 3, add an auxiliary structure: Please see Figure 8 The auxiliary structure includes a first housing 704, an external threaded connecting ring 705, a slag collection hole 706, an auxiliary curved surface 707, a second housing 708, and an internal threaded connecting ring 709. One end of the cleaning strip 703 is fixedly mounted on the first housing 704. An external threaded connecting ring 705 is located at the end of the first housing 704, and the external threaded connecting ring 705 and the internal threaded connecting ring 709 are threaded together. The internal threaded connecting ring 709 is located on the end face of the second housing 708. Both the second housing 708 and the first housing 704 have slag collection holes 706, and an auxiliary curved surface 707 is located on the outer edge of the slag collection hole 706. During the movement of the arc-shaped box 607, the auxiliary curved surface 707 is located on the arc-shaped box 608. The cleaning strip 703 on the inner side of the 07 removes impurities that are difficult to remove from the outer side of the casting 4. An elliptical shell is provided at the end of the cleaning strip 703, and a slag collection hole 706 is provided on the first shell 704 and the second shell 708. The second shell 708 and the first shell 704 are connected to form an elliptical shell, and one of the elliptical shells is provided at the end of the cleaning strip 703. The auxiliary curved surface 707 bends outward at the outer hole of the slag collection hole 706 to facilitate the entry and collection of impurities. It allows as many impurities as possible to enter the elliptical shell, reducing the pressure on the subsequent cleaning work of the conveyor table 3. While the casting is being preheated by turning over, the surface impurities of the casting are better cleaned during the turning process.

[0030] Therefore, this solution designs a preheating device for heat treatment of high-strength castings for wind power equipment. The castings can be rotated when heated, which is highly flexible. It can also remove impurities adhering to the surface of the castings, improve the uniformity of heating, and meet the processing quality requirements. Furthermore, it solves the problem that the castings cannot be rotated when heated in existing preheating devices for heat treatment of high-strength castings, and can be rotated for preheating.

[0031] Example 5: Based on Example 4, add a replacement structure 8: Please refer to Example 4. Figures 9-10The replacement structure 8 includes an arc-shaped elastic scraper 801, an auxiliary cotton ball 802, an auxiliary conical thorn 803, and cleaning auxiliary protrusions 804. Six arc-shaped elastic scrapers 801 form a cleaning scraper ball, with an auxiliary cotton ball 802 inside the cleaning scraper ball. The inner wall of the arc-shaped elastic scraper 801 is equidistantly fixed with auxiliary conical thorns 803, and the outer wall of the arc-shaped elastic scraper 801 is equidistantly fixed with cleaning auxiliary protrusions 804. The purpose of the arc-shaped elastic scraper 801 is to scrape and clean solid particulate impurities that have condensed on the workpiece. The auxiliary cotton ball 802 can absorb water stains on the workpiece, or temporarily store the auxiliary reagent when cleaning requires it, making it convenient for subsequent use and preventing it from being directly lost from the workpiece surface. The cleaning auxiliary protrusions 804 improve the cleaning effect of the cleaning scraper. The replacement structure 8 improves the flexibility of the cleaning operation, meets the cleaning needs during the heat treatment of the workpiece, and allows the casting to better absorb and remove water stains on its surface while it is being turned over for preheating, and further improves the cleaning effect of the cleaning auxiliary reagent.

[0032] To further address the problem that existing preheating devices for heat treatment of high-strength castings cannot rotate during heating, castings can be preheated by rotating them.

[0033] Example 6: Figure 1-10 As shown, based on Embodiment 5, this embodiment also provides a method for using a preheating device for heat treatment of high-strength castings for electrical equipment, including... Step 1: The casting 4 is clamped by the clamping assembly 5. The telescopic clamping rod 502 pushes the stabilizing clamping plate 504 to clamp the two ends of the casting 4, and the casting 4 is rotated by the set rotary motor 503. Step 2: The clamped casting 4 is conveyed to the preheating equipment support frame 1 via the conveyor table 3. Then, it is heated by the preheating mechanism 6. When the casting 4 reaches the preheating station, the control cylinder 601 pushes down the concave plate 603, so that the heating pipe 604 set on the inner side of the concave plate 603 heats it. At the same time, the push-pull control rod 605 set on one side of the preheating equipment support frame 1 pushes the arc-shaped box 607 to move, and the nozzle 610 on the inner side wall of the arc-shaped box 607 blows hot air onto the casting 4. This process has a heating auxiliary effect on the casting 4 and can also remove dust and impurities on the casting 4. Step 3: The auxiliary component 7 cleans the impurities on the casting 4 during the heat treatment process. During the movement of the arc-shaped box 607, the cleaning strip 703 located inside the arc-shaped box 607 removes impurities that are difficult to remove from the outside of the casting 4. An elliptical shell is provided at the end of the cleaning strip 703, and slag collection holes 706 are provided on the first shell 704 and the second shell 708. The second shell 708 and the first shell 704 are connected to form an elliptical shell, with one hole at the end of the cleaning strip 703. The auxiliary curved surface 707 bends outward at the outer hole of the slag collection hole 706 to facilitate the entry and collection of impurities, allowing as many impurities as possible to enter the elliptical shell and reducing the pressure on the subsequent cleaning work of the conveyor table 3. Step 4: After the preheating treatment of casting 4 is completed, it is transported to the initial position via conveyor 3. Then casting 4 is removed and a new casting 4 is installed and positioned for preheating processing.

[0034] 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 preheating device for heat treatment of high-strength castings for wind power equipment, characterized in that: The equipment includes a preheating equipment support frame (1), a support base (2), a conveyor platform (3), a casting (4), a clamping assembly (5), a preheating mechanism (6), and an auxiliary assembly (7). The support base (2) is connected to the preheating equipment support frame (1), and the support base (2) is slidably connected to the conveyor platform (3). The conveyor platform (3) is equidistantly provided with clamping assemblies (5), which clamp the casting (4) securely. The preheating equipment support frame (1) is connected to the inner side of the preheating mechanism (6), and the preheating mechanism (6) is connected to the auxiliary assembly (7).

2. The preheating device for heat treatment of high-strength castings for wind power equipment according to claim 1, characterized in that: The clamping assembly (5) includes a support plate (501), a telescopic clamping rod (502), a rotary motor (503), and a stabilizing chuck (504). The support plate (501) is equidistantly arranged on the conveyor table (3), and a telescopic clamping rod (502) is connected to one side of the support plate (501). One end of the telescopic clamping rod (502) extends to the inside of the support plate (501), and a rotary motor (503) is connected to the end of the rod. A stabilizing chuck (504) is connected to one end of the rotary motor (503), and the stabilizing chuck (504) clamps the casting (4).

3. The preheating device for heat treatment of high-strength castings for wind power equipment according to claim 1, characterized in that: The preheating mechanism (6) includes a control cylinder (601), a connecting plate (602), a concave enclosure plate (603), a heating pipe (604), a push-pull control rod (605), an arc-shaped support plate (606), an arc-shaped box (607), an extension protrusion (608), a hot air nozzle (609), and a nozzle (610). The control cylinder (601) is located on the top of the preheating equipment support frame (1), with one end of the control cylinder (601) extending to the inside of the preheating equipment support frame (1), and the end is fixedly provided with a connecting plate (602). The connecting plate (602) is fixedly connected to the concave enclosure plate (603) by bolts, and the inner sidewall of the concave enclosure plate (603) is equidistant. A heating pipe (604) is provided. The push-pull control rod (605) is connected to one side of the preheating equipment support frame (1), and one end of the push-pull control rod (605) extends to the inside of the preheating equipment support frame (1). An arc-shaped bearing plate (606) is fixedly provided at the end. The arc-shaped bearing plate (606) is fixedly connected to the arc-shaped box (607) by screws. An extension protrusion (608) is symmetrically provided on the outer wall of the arc-shaped box (607). A hot air nozzle (609) is connected to the extension protrusion (608). Nozzles (610) are equidistantly provided on the inner wall of the arc-shaped box (607). An auxiliary component (7) is provided on the inner wall of the arc-shaped box (607).

4. A preheating device for heat treatment of high-strength castings for wind power equipment according to claim 3, characterized in that: The heating pipe (604) is equidistantly arranged on both sides and the top side of the inner wall of the concave enclosure (603).

5. A preheating device for heat treatment of high-strength castings for wind power equipment according to claim 3, characterized in that: The nozzles (610) are arranged in an arc shape at equal intervals on the inner side wall of the arc-shaped box (607), and the nozzles (610) are positioned in a corresponding manner to the extension protrusions (608).

6. A preheating device for heat treatment of high-strength castings for wind power equipment according to claim 1, characterized in that: The auxiliary component (7) includes an arc-shaped plate (701), connecting feet (702), and cleaning strips (703); the arc-shaped plate (701) is symmetrically fixed with connecting feet (702) at both ends, and the connecting feet (702) are fixedly connected to the inner wall of the arc-shaped box (607) by screws, and the arc-shaped plate (701) is equidistantly provided with cleaning strips (703).

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