Martensitic stainless steel casting stress relief aging furnace

Abstract

The utility model discloses a martensitic stainless steel casting stress relief aging oven which comprises a structural box, a sealing door plate is installed on a shell of the structural box, an enclosure cavity is defined by the structural box and the sealing door plate, an ash removal assembly is installed in the enclosure cavity, and an auxiliary assembly is installed on the structural box. Sliding rails are fixedly connected to the symmetrical positions of the bottom end face of the inner wall of the enclosure cavity, moving cavities are formed in the two sliding rails, a screw rod is rotationally installed in each moving cavity, a moving block is installed in each moving cavity, a vertical scraping plate is arranged on the bottom end face of the inner wall of the enclosure cavity, and the scraping plate is arranged outside the section of the sliding rail through a structural hole in a sleeving mode; through cooperative operation of the ash removal assembly and the auxiliary assembly, when a casting is automatically pushed out, ash removal is conducted on the hearth, the effect of cooling the casting again is achieved, and the safety of operators is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of stress relief technology for stainless steel castings, specifically to a stress relief aging furnace for martensitic stainless steel castings. Background Technology

[0002] In the production and processing of martensitic stainless steel castings, an aging furnace is needed to relieve stress in the castings in order to ensure that the quality of the produced stainless steel castings meets production requirements.

[0003] During existing operations, the surface of stainless steel castings will undergo partial oxidation at high temperatures. Long-term operation of the aging furnace may lead to ash accumulation in the furnace chamber. If the accumulated dust floats on the stainless steel castings, it will affect the subsequent stress relief work. Workers will need to spend time cleaning it later. Furthermore, when the castings are taken out of the furnace after stress relief, there will still be residual heat on the furnace wall and the castings. Workers may get burned if they put their hands into the furnace chamber. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a stress-relieving aging furnace for martensitic stainless steel castings. This stress-relieving aging furnace for martensitic stainless steel castings, through the structural design of its ash-cleaning components, achieves the effect of cleaning the inner wall of the enclosing cavity while simultaneously pushing the casting out of the cavity. With the assistance of auxiliary components, it further cools the casting, which still retains residual heat, preventing burns to workers, and automatically extracts and cleans accumulated ash.

[0005] The technical solution of this application is as follows:

[0006] A stress-relieving aging furnace for martensitic stainless steel castings includes a structural box. A sealing door plate is installed on the shell of the structural box. The structural box and the sealing door plate enclose an enclosed cavity. A cleaning assembly is installed inside the enclosed cavity. An auxiliary assembly is installed on the structural box. The cleaning assembly includes slide rails. Slide rails are symmetrically fixed to the bottom end face of the inner wall of the enclosed cavity. Each slide rail has a movable cavity inside. Movable holes are opened at equal heights on the vertical structural surfaces of the two slide rails that are far apart from each other. Each movable cavity has a rotatable mounting hole inside. Equipped with a screw, each movable cavity contains a movable block, which is threaded onto the outside of the screw section at the corresponding position. A vertical scraper is provided on the bottom end face of the inner wall of the enclosing cavity. The scraper is fitted onto the outside of the slide rail section through a structural hole. A scraping frame is fixed to the top of the scraper. The end of the movable block passes through the movable hole and is connected to the scraper body. A drive motor is symmetrically installed on the outer shell of the structural box away from the sealing door panel. The output shaft of the drive motor is inserted into the inside of the movable cavity and connected to the end of the screw at the corresponding position.

[0007] Compared with existing technologies, by combining the dust removal component with the auxiliary component, the accumulated dust generated during stress relief can be scraped and cleaned. At the same time, the limiting slip and the pallet can be pushed out along the slide rail. During the process of the casting leaving the enclosure cavity, the cooling and dust removal effects can be achieved again. This ensures the safety of the staff and can also automatically clean the inner wall of the enclosure cavity.

[0008] As an optimization, in the aforementioned stress-relieving aging furnace for martensitic stainless steel castings, the bottom end face of the scraper is in contact with the bottom end face of the enclosing cavity, the edge of the structural hole at the bottom of the scraper is in contact with the outer surface of the slide rail, and the edge of the scraper frame is in contact with the inner wall of the enclosing cavity. This structure ensures that accumulated dust adhering to the inner wall of the enclosing cavity and the outer surface of the slide rail is effectively scraped off, guaranteeing the cleanliness of both surfaces.

[0009] As an optimization, in the aforementioned stress-relief aging furnace for martensitic stainless steel castings, symmetrical limiting grooves are provided on the upper sides of each slide rail, and limiting latches are installed inside the limiting grooves. A support plate is fixed to the top of the limiting latch, and structural holes are equidistantly opened on the plate. Foldable support rods are symmetrically installed at the bottom of the end of the support plate near the sealing door plate. With this structure, the movement position of the support plate and the casting on it can be controlled by sliding the limiting latches on the slide rail. The foldable support rods can provide support for the end of the support plate extending out of the enclosing cavity, facilitating the placement and movement of stainless steel castings without requiring the operator's body to enter the interior of the enclosing cavity.

[0010] As an optimization, in the aforementioned stress-relief aging furnace for martensitic stainless steel castings, the auxiliary component includes a suction chamber. The suction chamber is located at the bottom of the structural box near the sealing door plate, below the enclosed cavity. A suction port is located in the enclosed cavity near the sealing door plate, with its bottom communicating with the suction chamber. A connecting short pipe is installed slightly below the structural surface of the structural box where the sealing door plate is installed. One end of the connecting short pipe communicates with the suction chamber, and the other end is connected to a collection box. With this structure, as the stress-relieved casting is moved out of the enclosed cavity via the pallet, the suction port generates a suction force. Under the action of the structural holes on the pallet, the casting is further cooled, preventing excessively high residual temperatures that could burn workers. Simultaneously, accumulated ash pushed to the suction chamber opening is also drawn into the suction chamber through the suction port and collected in the collection box via the connecting short pipe, achieving automatic ash removal.

[0011] As an optimization, in the aforementioned stress-relief aging furnace for martensitic stainless steel castings, a small air pump is installed at one end of the collection box near the rotation center of the sealing door plate. A mounting base is installed on top of the small air pump, and a positive electrode plate is mounted on the mounting base. A negative electrode plate is installed on the lower part of the outer structural surface of the sealing door plate near the rotation center of the sealing door plate. With this structure, the small air pump provides power to the collection box, ensuring that the inside of the collection box is under negative pressure. This negative pressure also creates a negative pressure inside the extraction chamber, allowing the extraction port to generate suction. The small air pump only operates when the positive electrode plate contacts the negative electrode plate, ensuring that the extraction chamber only operates when the casting is being removed from the furnace.

[0012] As an optimization, in the aforementioned stress-relieving aging furnace for martensitic stainless steel castings, a heating box is installed at the top of the structural box, and air inlet pipes are installed on both sides of the heating box. Air supply chambers are opened inside the side plates of the structural box, and the bottom end of the air inlet pipes acts on the air supply chambers. Air blowing holes are opened on both sides of the inner wall of the enclosed cavity, and these air blowing holes are connected to the air supply chambers. With this structure, the heating box can heat the air used for operation and circulate it into the interior of the enclosed cavity through the air inlet pipes and air blowing holes, achieving uniform temperature inside the enclosed cavity and ensuring uniform heating of the castings during the heating process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the open state of the sealing door panel of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the positive electrode sheet and the negative electrode sheet of this utility model when they are in contact;

[0016] Figure 4 This is a schematic diagram of the internal structure of the enclosing cavity of this utility model;

[0017] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0018] Figure 6 This is a structural diagram showing the installation position of the scraper and scraping frame of this utility model;

[0019] The labels in the attached diagram are:

[0020] 1. Structural box; 2. Sealed door panel; 3. Enclosed cavity; 4. Slide rail; 5. Moving cavity; 6. Moving hole; 7. Screw; 8. Moving block; 9. Scraper; 10. Scraper frame; 11. Limiting slide buckle; 12. Support plate; 13. Air extraction chamber; 14. Air extraction port; 15. Collection box; 16. Connecting short pipe; 17. Small air pump; 18. Mounting base; 19. Positive electrode plate; 20. Negative electrode plate; 21. Drive motor; 22. Heating box; 23. Air inlet pipe; 24. Air blowing hole. Detailed Implementation

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application.

[0022] Example (see) Figures 1-6 ):

[0023] A stress-relieving aging furnace for martensitic stainless steel castings includes a structural box 1. A sealing door plate 2 is installed on the shell of the structural box 1. The structural box 1 and the sealing door plate 2 enclose an enclosing cavity 3. A cleaning assembly is installed inside the enclosing cavity 3. An auxiliary assembly is installed on the structural box 1. The cleaning assembly includes a slide rail 4. The slide rail 4 is fixedly connected to the bottom end face of the inner wall of the enclosing cavity 3 at a symmetrical position. Each of the two slide rails 4 has a movable cavity 5 inside. Movable holes 6 are opened at equal heights on the vertical structural surfaces of the two slide rails 4 that are far apart from each other. A screw is rotatably installed inside each movable cavity 5. The rod 7, each movable cavity 5 has a movable block 8 installed inside it. The movable block 8 is threaded onto the outside of the corresponding screw rod 7 section. The bottom end face of the inner wall of the enclosing cavity 3 is provided with a vertical scraper 9. The scraper 9 is sleeved onto the outside of the slide rail 4 section through a structural hole. The top of the scraper 9 is fixedly connected to a scraping frame 10. The end of the movable block 8 passes through the movable hole 6 and is connected to the scraper 9. The outer shell of the structural box 1 is symmetrically equipped with a drive motor 21 at the end away from the sealing door panel 2. The output shaft of the drive motor 21 is inserted into the inside of the movable cavity 5 and connected to the end of the corresponding screw rod 7.

[0024] In this embodiment, the two drive motors 21 operate synchronously to provide driving force for the rotation of the screw 7. After the casting is stress-relieved, the sealing door plate 2 is opened and the drive motors 21 are started. The scraping frame 10 rotates, and the moving block 8 drives the scraper 9 and the scraping frame 10 to move along the inner wall of the enclosing cavity 3 and the outer surface of the slide rail 4, so as to scrape off the accumulated dust. The movement of the scraper 9 will push the support plate 12 to move towards the sealing door plate 2. With the cooperation of the limiting slide buckle 11, the casting is pushed out of the working range of the sealing door plate 2 while scraping the dust.

[0025] In this embodiment, the bottom end face of the scraper 9 is in contact with the bottom end face of the enclosing cavity 3, the edge of the structural hole at the bottom of the scraper 9 is in contact with the outer surface of the slide rail 4, and the edge of the scraping frame 10 is in contact with the inner wall surface of the enclosing cavity 3. This structure ensures that accumulated dust adhering to the inner wall surface of the enclosing cavity 3 and the outer surface of the slide rail 4 is effectively scraped off, guaranteeing the cleanliness of both surfaces.

[0026] In this embodiment, each slide rail 4 has symmetrically provided limiting grooves on its two sides, slightly above the sides, and limiting latches 11 are provided inside the limiting grooves. A support plate 12 is fixedly connected to the top of the limiting latches 11. Structural holes are equidistantly provided through the plate of the support plate 12. Foldable support rods are symmetrically installed at the bottom of the end of the support plate 12 near the sealing door panel 2. With this structure, the movement position of the support plate 12 and the casting on it can be controlled by sliding the limiting latches 11 on the slide rail 4. The foldable support rods can provide support for the end of the support plate 12 that extends out of the enclosing cavity 3, which facilitates the placement and movement of stainless steel castings without requiring the operator's body to enter the interior of the enclosing cavity 3.

[0027] In this embodiment, the auxiliary component includes an air extraction chamber 13. The air extraction chamber 13 is provided at the bottom of the structural box 1 near the sealing door plate 2. The air extraction chamber 13 is located below the enclosed cavity 3. The enclosed cavity 3 is provided with an air extraction port 14 near the sealing door plate 2. The bottom of the air extraction port 14 is connected to the air extraction chamber 13. A connecting short pipe 16 is installed at a position slightly below the structural surface of the structural box 1 where the sealing door plate 2 is installed. One end of the connecting short pipe 16 is connected to the air extraction chamber 13, and the other end of the connecting short pipe 16 is connected to a collection box 15. With this structure, as the stress-relieved casting is moved out of the enclosed cavity 3 through the pallet 12, the opening of the exhaust port 14 generates suction. Under the action of the structural holes on the pallet 12, the casting is cooled down again, preventing the residual temperature on the casting from being too high and burning the workers. At the same time, the accumulated dust pushed to the opening of the exhaust cavity 13 is also drawn into the interior of the exhaust cavity 13 through the exhaust port 14, and is collected in the collection box 15 through the connecting short pipe 16, realizing automatic cleaning of the accumulated dust.

[0028] In this embodiment, a small air pump 17 is installed at one end of the collection box 15 near the rotation center of the sealing door plate 2. A mounting base 18 is installed on the top of the small air pump 17, and a positive electrode plate 19 is installed on the mounting base 18. A negative electrode plate 20 is installed on the lower part of the outer structural surface of the sealing door plate 2 near the rotation center of the sealing door plate 2. With this structure, the small air pump 17 can provide power for the operation of the collection box 15, ensuring that the inside of the collection box 15 is in a negative pressure state, causing the inside of the suction chamber 13 to also be in a negative pressure state, thereby enabling the suction port 14 to generate suction. The small air pump 17 will only operate when the positive electrode plate 19 is in contact with the negative electrode plate 20, ensuring that the suction chamber 13 only operates when the casting is unloaded from the furnace.

[0029] In this embodiment, a heating box 22 is provided on the top of the structural box 1, and air inlet pipes 23 are installed on both sides of the heating box 22. Air supply chambers are formed inside the side plates of the structural box 1, and the bottom end of the air inlet pipes 23 acts on the air supply chambers. Air blowing holes 24 are formed on both sides of the inner wall of the enclosed cavity 3, and the air blowing holes 24 are connected to the air supply chambers. With this structure, the heating box 22 can heat the air used for operation and circulate it into the enclosed cavity 3 through the air inlet pipes 23 and air blowing holes 24, achieving uniform temperature inside the enclosed cavity 3 and ensuring uniform heating of the casting during the heating process.

[0030] Working principle: After the casting is stress-relieved, the sealing door plate 2 is opened, causing the negative electrode plate 20 on it to contact the positive electrode plate 19 on the mounting base 18. This causes the small air pump 17 to operate. With the cooperation of the connecting short pipe 16, a negative pressure is generated inside the collection box 15 and the suction chamber 13. The opening position of the suction port 14 generates suction. At the same time, the drive motor 21 starts, the screw 7 inside the moving chamber 5 rotates, and the scraper 9 and scraping frame 10 move along the moving hole 6 towards the sealing door plate 2, scraping off the accumulated dust on the inner wall of the enclosing cavity 3 and the outer surface of the slide rail 4. Meanwhile, the scraper 9 contacts the support plate 12 and applies pressure to the support plate 12. With the push force applied towards the sealing door panel 2 and the cooperation of the limiting slide buckle 11, the stainless steel casting placed on the pallet 12 is pushed out of the enclosed cavity 3 working range, eliminating the need for the operator's body to enter the enclosed cavity 3. As the pallet 12 moves the casting, the suction generated by the exhaust port 14 cools the casting on the pallet 12 again, preventing the residual temperature on the casting from being too high. When the scraper 9 moves to the edge of the exhaust port 14, the suction generated by the exhaust port 14 will suck up the nearby accumulated dust and collect it inside the collection box 15, thus achieving automatic collection of scraped dust while cooling the casting.

[0031] Although embodiments of the present utility 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 present utility, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stress-relieving aging furnace for martensitic stainless steel castings, characterized in that: The system includes a structural box (1), on which a sealing door panel (2) is installed. The structural box (1) and the sealing door panel (2) enclose a cavity (3). A dust removal assembly is installed inside the cavity (3). An auxiliary assembly is installed on the structural box (1). The dust removal assembly includes a slide rail (4). The slide rail (4) is fixedly connected to the bottom end face of the inner wall of the cavity (3) at a symmetrical position. A movable cavity (5) is opened inside each of the two slide rails (4). Movable holes (6) are opened at the same height on the vertical structural surfaces of the two slide rails (4) that are far apart from each other. A screw (7) is rotatably installed inside each movable cavity (5). The interior of each cavity is equipped with a movable block (8), which is threaded onto the outside of the corresponding screw (7) section. A vertical scraper (9) is provided on the bottom end face of the inner wall of the enclosing cavity (3). The scraper (9) is threaded onto the outside of the slide rail (4) section through a structural hole. A scraping frame (10) is fixed to the top of the scraper (9). The end of the movable block (8) passes through the movable hole (6) and is connected to the plate body of the scraper (9). A drive motor (21) is symmetrically installed on the outer shell of the structural box (1) away from the sealing door plate (2). The output shaft of the drive motor (21) is inserted into the interior of the movable cavity (5) and connected to the end of the corresponding screw (7).

2. The stress-relieving aging furnace for martensitic stainless steel castings according to claim 1, characterized in that: The bottom end face of the scraper (9) is in contact with the bottom end face of the enclosing cavity (3). The edge of the structural hole at the bottom of the scraper (9) is in contact with the outer surface of the slide rail (4). The edge of the scraping frame (10) is in contact with the inner wall of the enclosing cavity (3).

3. The stress-relieving aging furnace for martensitic stainless steel castings according to claim 2, characterized in that: Each slide rail (4) has a symmetrically arranged limit groove on the upper side of both sides, and a limit buckle (11) is provided inside the limit groove. A support plate (12) is fixed to the top of the limit buckle (11). Structural holes are equidistantly opened on the plate of the support plate (12). A foldable support rod is symmetrically installed at the bottom of the end of the support plate (12) near the sealing door plate (2).

4. The stress-relieving aging furnace for martensitic stainless steel castings according to claim 3, characterized in that: The auxiliary component includes an air extraction chamber (13). The air extraction chamber (13) is located at the bottom of the structural box (1) near the sealing door plate (2). The air extraction chamber (13) is located below the enclosed cavity (3). The enclosed cavity (3) is located near the sealing door plate (2). The bottom of the air extraction port (14) is connected to the air extraction chamber (13). A connecting short pipe (16) is installed on the structural surface of the structural box (1) where the sealing door plate (2) is installed. One end of the connecting short pipe (16) is connected to the air extraction chamber (13), and the other end of the connecting short pipe (16) is connected to a collection box (15).

5. The stress-relieving aging furnace for martensitic stainless steel castings according to claim 4, characterized in that: A small air pump (17) is installed at one end of the collection box (15) near the rotation center of the sealing door plate (2). A mounting base (18) is installed on the top of the small air pump (17). A positive electrode plate (19) is installed on the mounting base (18). A negative electrode plate (20) is installed on the lower part of the outer structural surface of the sealing door plate (2) near the rotation center of the sealing door plate (2).

6. The stress-relieving aging furnace for martensitic stainless steel castings according to claim 5, characterized in that: The top of the structural box (1) is provided with a heating box (22), and air inlet pipes (23) are installed on both sides of the heating box (22). Air supply chambers are opened inside the side plates of the structural box (1), and the bottom end of the air inlet pipe (23) acts on the air supply chamber. Air blowing holes (24) are opened on both sides of the inner wall of the enclosed cavity (3), and the air blowing holes (24) are connected to the air supply chamber.

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