An automatic locking device for the furnace door of a high-temperature alloy atomization powder-making furnace

Abstract

The present invention discloses an automatic locking device for the furnace door of a superalloy atomization powder-making furnace, which relates to the technical field of powder metallurgy equipment and includes a furnace cover and a furnace body; a rotary buckle is arranged on the furnace cover, and a box body is fixed on the furnace body. The box body is of a square structure, and an upper end cover and a front end cover are arranged on the box body and the interior is hollow. Sliding grooves are formed on both inner side walls of the box body; a sliding bolt is arranged inside the box body, and the width of the sliding bolt is the same as the distance between the sliding grooves on both inner sides of the box body. A locking screw rod is vertically penetrated through the box body. The locking screw rod is of an L-shaped structure, and a cam is arranged at the bottom of the locking screw rod. The structure of the present invention is reasonable, and it can realize the automatic locking of the furnace door of the superalloy atomization powder-making furnace and the locking, opening and closing under the inflated state, solve the problem that the locking screw rod causes excessive pressure when being tightened again under the vacuum state in the prior art, and there is a problem that the bolt and the nut are too tightly engaged and difficult to disassemble, making it easier to open and close the furnace cover and providing convenience for superalloy atomization powder-making.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy equipment, and particularly relates to an automatic locking device for the furnace door of a high-temperature alloy atomization powder-making furnace. Background Art

[0002] The high-temperature alloy argon atomization powder-making furnace is a powder metallurgy production equipment. High-temperature alloy powder is prepared by the gas atomization method. After the equipment is loaded with the high-temperature alloy master alloy, the master alloy is heated to a metal melt with a certain degree of superheat under vacuum by electromagnetic induction, and the molten steel is atomized into metal powder with a certain particle size by high-pressure inert gas argon.

[0003] During the process of producing high-temperature alloy powder, good airtightness of the equipment is the key to preparing high-quality high-temperature alloy powder. It is necessary to effectively isolate the internal and external atmospheric environments to ensure that the high-temperature alloy molten steel and powder are not oxidized by the atmosphere. Specifically, a sealing ring with a certain elasticity is used to seal between the furnace cover and the furnace body of the equipment. The furnace cover is closed in the atmospheric state, and then the inside is pumped to a high vacuum. After heating for a period of time, argon is injected into the furnace for atomization. At this time, the pressure inside the furnace is less than the atmosphere, but it is not a high vacuum. After atomization, the furnace cover is opened. In the past, ordinary bolt groups were used to fasten the furnace cover. During the process of pumping high vacuum, the sealing ring of the furnace cover is further compressed and deformed under the action of atmospheric pressure, and the screw needs to be re-fastened. When atomization is over, argon is first injected into the furnace to the atmospheric level. At this time, due to the reason that the furnace cover bolts are re-fastened in the vacuum state, the pressure is too high, and there is a problem that the bolt and nut are bitten too tightly and it is difficult to disassemble. Therefore, it is very necessary to design an automatic locking device for a high-temperature alloy atomization powder-making furnace so that the pressure inside the furnace can be automatically fastened in the vacuum state and can be easily disassembled in the atmospheric state. Summary of the Invention

[0004] The purpose of the present application is to provide an automatic locking device for the furnace door of a high-temperature alloy atomization powder-making furnace, which can realize the automatic locking of the furnace door of the high-temperature alloy atomization powder-making furnace and the locking and opening / closing in the inflated state, solve the problem that the locking screw is re-fastened in the vacuum state in the prior art, resulting in too high pressure and difficult disassembly of the bolt and nut, and make the opening and closing of the furnace cover easier, providing convenience for high-temperature alloy atomization powder-making.

[0005] To achieve the above purpose, the present application provides the following technical solution: An automatic locking device for the furnace door of a high-temperature alloy atomization powder-making furnace, including a furnace cover and a furnace body;

[0006] A rotary buckle is provided on the furnace cover, and a box body is fixed on the furnace body. The box body is of a square structure, with an upper end cover and a front end cover provided on the box body and the interior being hollow. Sliding grooves are provided on both inner side walls of the box body; A sliding bolt is arranged inside the box body, and the width of the sliding bolt is the same as the distance between the sliding grooves on both inner sides of the box body. A locking screw rod is vertically penetrated through the box body. The locking screw rod is of an L-shaped structure. A cam is arranged at the bottom of the locking screw rod. Multiple inclined tooth grooves adapted to the cam are provided on the surface of the sliding bolt facing the furnace body. A convex plate is arranged on the surface of the sliding bolt away from the furnace body. Rack teeth are provided on both side walls of the convex plate. A pair of ratchets are rotatably installed on the front end cover. Gears are arranged at one ends of the shaft rods of the pair of ratchets extending into the box body. The gears are mutually matched with the rack teeth. Sliding top blocks are arranged on both sides of the convex plate. A first pressure spring is arranged between the sliding top blocks and the sliding bolt. A second pressure spring is vertically arranged between the bottom of the sliding bolt and the bottom wall of the box body. A catch is arranged on the outer wall of the front end cover. The catch is mutually matched with the ratchet. A spring piece is installed on one side of the catch.

[0007] In a further embodiment, a retaining ring is arranged in the middle of the locking screw rod, and a pair of sleeve plates are arranged on the furnace cover. The retaining ring is located between the pair of sleeve plates.

[0008] In a further embodiment, the rack teeth on both side walls of the convex plate are arranged in a staggered manner.

[0009] In a further embodiment, a guide rod is vertically penetrated through the second pressure spring, and the top end of the guide rod is fixedly connected with the sliding bolt.

[0010] In a further embodiment, through holes for the locking screw rod to pass through and slot holes for the guide rod to pass through are provided on the bottom wall of the box body.

[0011] In a further embodiment, a sealing ring is arranged at the connection between the furnace cover and the furnace body.

[0012] In a further embodiment, the sliding top block is in sliding contact with the front end cover.

[0013] In summary, the technical effects and advantages of the present invention:

[0014] The structure of the present invention is reasonable. Through the meshing and limiting of the cam at the bottom of the locking screw and the inclined tooth groove on the sliding bolt, the meshing of the rack and the gear, and the limiting of the ratchet and the catch, when the locking screw and the rotary buckle close the furnace cover, the locking of the furnace cover can be realized by the downward movement of the locking screw. And because the locking screw and the sliding bolt are limited by the meshing of the cam and the inclined tooth groove, it is more labor-saving to rotate the locking screw. When the cam of the locking screw rotates back to the open position, the sliding bolt contacts the edge of the inner chute of the box body close to the furnace body again under the action of the downward second pressure spring. The rack on the sliding bolt disengages from the gear, and under the action of the second pressure spring, it returns to the open position again. The locking screw is withdrawn from the box body, and the opening and closing of the furnace cover can be completed, so as to realize the automatic locking, locking and opening and closing under the inflated state of the furnace door of the superalloy atomization powder-making furnace, solve the problem that the locking screw is tightened again under the vacuum state in the prior art, resulting in excessive pressure and the problem that it is difficult to disassemble due to the over-tight engagement of the bolt and the nut, making the opening and closing of the furnace cover easier and providing convenience for superalloy atomization powder-making. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the box body of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the sliding bolt of the present invention;

[0019] Figure 4 It is an exploded view of the sliding bolt of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the locking screw of the present invention;

[0021] Figure 6 It is a schematic diagram of the back structure of the sliding bolt of the present invention;

[0022] Figure 7 It is a schematic diagram of the bottom structure of the box body of the present invention.

[0023] In the figure: 1. furnace cover; 2. furnace body; 3. rotating buckle; 4. locking screw; 5. sealing ring; 6. box body; 7. upper end cover; 8. front end cover; 9. sleeve plate; 10. chute; 11. retaining ring; 12. sliding bolt; 13. convex plate; 14. rack; 15. first pressure spring; 16. ratchet; 17. clip; 18. spring piece; 19. sliding top block; 20. second pressure spring; 21. guide rod; 22. gear; 23. cam; 24. helical slot; 25. through hole; 26. slot hole. Detailed implementation manner

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment: Refer to Figures 1-7 An automatic locking device for the furnace door of a superalloy atomization powder-making furnace as shown, which includes a furnace cover 1 and a furnace body 2, and a sealing ring 5 is arranged at the connection between the furnace cover 1 and the furnace body 2. Specifically, a rotating buckle 3 is arranged on the furnace cover 1, and the rotating buckle 3 can rotate. A box body 6 is fixed on the furnace body 2. The box body 6 is of a square structure, and an upper end cover 7 and a front end cover 8 are arranged on the box body 6 and the inside is hollow. Chutes 10 are opened on both inner side walls of the box body 6; A sliding bolt 12 is arranged inside the box body 6. The width of the sliding bolt 12 is the same as the distance between the two chutes 10 on the inner side of the box body 6, so that the sliding bolt 12 can slide along the chute 10, and at the same time, the sliding bolt 12 can move back and forth in the chute 10.

[0026] In a further embodiment, a locking screw 4 is vertically penetrated through the box body 6. The locking screw 4 is of an L-shaped structure, and the rotating buckle 3 and the locking screw 4 can be locked by overlapping each other (such as Figure 1As shown in the figure; among them, a retaining ring 11 is arranged in the middle of the locking screw rod 4, and a pair of sleeve plates 9 are arranged on the furnace cover 1. The retaining ring 11 is located between the pair of sleeve plates 9, enabling the locking screw rod 4 to rotate freely and move up and down with the furnace cover 1. A cam 23 is arranged at the bottom of the locking screw rod 4. Multiple inclined tooth grooves 24 adapted to the cam 23 are arranged on the side of the sliding bolt 12 facing the furnace body 2. A convex plate 13 is arranged on the side of the sliding bolt 12 away from the furnace body 2. Rack teeth 14 are arranged on both side walls of the convex plate 13. Among them, the rack teeth 14 on both side walls of the convex plate 13 are arranged in a staggered manner. Specifically, the two rack teeth 14 are asymmetric, and the two rack teeth 14 are staggered by half a pitch. A pair of ratchets 16 are rotatably installed on the front end cover 8. A gear 22 is arranged at one end of the shaft rods of the pair of ratchets 16 extending into the box body 6. The gear 22 is in mutual cooperation with the rack teeth 14. Among them, both the side of the gear 22 and the side of the rack teeth 14 have a certain taper (not shown in the figure) to facilitate the mutual movement and meshing of the gear 22 and the rack teeth 14. Sliding top blocks 19 are arranged on both sides of the convex plate 13. A first pressure spring 15 is arranged between the sliding top blocks 19 and the sliding bolt 12. The sliding top blocks 19 are in sliding abutment with the front end cover 8. A second pressure spring 20 is vertically arranged between the bottom of the sliding bolt 12 and the bottom wall of the box body 6. A guide rod 21 is vertically inserted into the second pressure spring 20. The top end of the guide rod 21 is fixedly connected to the sliding bolt 12; through holes 25 for the locking screw rod 4 to pass through and slot holes 26 for the guide rod 21 to pass through are arranged on the bottom wall of the box body 6 for limiting and guiding the guide rod 21 and the locking screw rod 4. A clip 17 is arranged on the outer wall of the front end cover 8. The clip 17 is in mutual cooperation with the ratchet 16. A spring piece 18 is installed on one side of the clip 17.

[0027] The working principle of this utility model:

[0028] During use, when the furnace cover 1 is closed, the locking screw 4 is in the open position. The handle part of the locking screw 4 is perpendicular to the surface of the furnace cover 1. The bottom end of the locking screw 4 passes through the upper end cover 7 and vertically extends into the box body 6. At this time, the rotating buckle 3 is also in the open position (i.e., turned to the side away from the locking screw 4). At this time, the sliding bolt 12 is always in contact with the edge of the chute 10 facing the furnace body 2 under the action of the sliding top block 19 and the first pressure spring 15. The rack 14 on the sliding bolt 12 is disengaged from the gear 22 at this time and is pushed by the second pressure spring 20, so that the sliding bolt 12 always faces the upper end cover 7. After the furnace cover 1 is closed, the sealing ring 5 is partially deformed, and the inside of the device is sealed in the atmospheric state. The rotating locking screw 4 and the rotating buckle 3 are in the closed position (interlocked). At this time, the sliding bolt 12 is lifted under the action of the cam 23, and the rack 14 on the sliding bolt 12 meshes with the corresponding gear 22. At this time, the sliding bolt 12 is limited. When the inside of the device is evacuated to a high vacuum state, the sealing ring 5 is further compressed, and the furnace cover 1 moves downward with the locking screw 4. The locking screw 4 and the sliding bolt 12 should cooperate through the cam 23 and the helical groove 24 to drive the sliding bolt 12 to move downward together. At this time, the ratchet 16 rotates under the drive of the rack 14 of the sliding bolt 12. At the same time, under the action of the spring piece 18, the catch 17 always contacts the ratchet 16, so that the ratchet 16 can only rotate in the same direction. Due to the dislocation between the two racks 14 of the sliding bolt 12, the minimum displacement for locking the locking screw 4 is further reduced. After the furnace cover 1 is inflated, the rotating buckle 3 is turned to the open position, and the locking screw 4 is rotated. Since the locking screw 4 and the sliding bolt 12 are engaged and limited by the cam 23 and the helical groove 24, it is more labor-saving to rotate the locking screw 4. When the cam 23 of the locking screw 4 returns to the open position, the sliding bolt 12 contacts the edge of the chute 10 in the box body 6 close to the furnace body 2 again under the action of the downward second pressure spring 20. The rack 14 on the sliding bolt 12 is disengaged from the gear 22 and returns to the open position again under the action of the second pressure spring 20. The locking screw 4 is withdrawn from the box body 6 to complete the opening and closing of the furnace cover 1. Through the above steps, the automatic locking of the furnace door of the superalloy atomization powder-making furnace and the locking, opening and closing in the inflated state can be quickly completed.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic locking device for the furnace door of a superalloy atomization powder-making furnace, comprising a furnace cover (1) and a furnace body (2), characterized in that: A rotary buckle (3) is arranged on the furnace cover (1), and a box body (6) is fixed on the furnace body (2). The box body (6) is of a square structure, and an upper end cover (7) and a front end cover (8) are arranged on the box body (6) and the interior is hollow. Chutes (10) are opened on both inner side walls of the box body (6); A sliding bolt (12) is arranged inside the box body (6), and the width of the sliding bolt (12) is the same as the distance between the two chutes (10) on the inner side of the box body (6). A locking screw rod (4) is vertically penetrated through the box body (6). The locking screw rod (4) is of an L-shaped structure. A cam (23) is arranged at the bottom of the locking screw rod (4). Multiple inclined tooth grooves (24) adapted to the cam (23) are opened on one side of the sliding bolt (12) facing the furnace body (2). A convex plate (13) is arranged on the side of the sliding bolt (12) away from the furnace body (2). Rack teeth (14) are arranged on both side walls of the convex plate (13). A pair of ratchets (16) are rotatably installed on the front end cover (8). Gears (22) are arranged at one ends of the shaft rods of the pair of ratchets (16) extending into the box body (6). The gears (22) cooperate with the rack teeth (14). Sliding top blocks (19) are arranged on both sides of the convex plate (13). A first compression spring (15) is arranged between the sliding top blocks (19) and the sliding bolt (12). A second compression spring (20) is vertically arranged between the bottom of the sliding bolt (12) and the bottom wall of the box body (6). A catch (17) is arranged on the outer wall of the front end cover (8). The catch (17) cooperates with the ratchet (16). A spring piece (18) is installed on one side of the catch (17); The rack teeth (14) on both side walls of the convex plate (13) are arranged in a staggered manner; A guide rod (21) is vertically penetrated through the second compression spring (20), and the top end of the guide rod (21) is fixedly connected to the sliding bolt (12); A through hole (25) for the locking screw rod (4) to pass through and a slot hole (26) for the guide rod (21) to pass through are opened on the bottom wall of the box body (6); The sliding top block (19) is in sliding contact with the front end cover (8).

2. The automatic locking device for the furnace door of a superalloy atomization powder-making furnace according to claim 1, characterized in that: A retaining ring (11) is arranged in the middle of the locking screw rod (4), and a pair of sleeve plates (9) are arranged on the furnace cover (1). The retaining ring (11) is located between the pair of sleeve plates (9).

3. The automatic locking device for the furnace door of a superalloy atomization powder-making furnace according to claim 1, wherein: A sealing ring (5) is arranged at the connection between the furnace cover (1) and the furnace body (2).

Images