Sealing structure of metal heat treatment vacuum furnace

Abstract

The utility model provides a metal heat treatment vacuum furnace sealing structure, and relates to the technical field of vacuum furnace sealing. The metal heat treatment vacuum furnace sealing structure comprises a fixed top plate, a connecting ring is fixedly connected to the outer surface of the fixed top plate, a sealing mechanism is arranged outside the fixed top plate and comprises a cover plate, and a blocking plate and a sealing ring are fixedly connected to the outer surface of the cover plate; the outer surfaces of the blocking plate and the sealing ring are both in sliding connection with the connecting ring. According to the sealing structure of the metal heat treatment vacuum furnace, the cover plate, the blocking plate, the sealing ring, the first rotating rod, the swing plate, the second rotating rod, the movable plate, the connecting plate, the sliding frame and the air cylinder are arranged in a matched mode, so that the connecting ring can be completely sealed through blocking of the blocking plate and surrounding of the sealing ring on the periphery of the blocking plate; and the phenomenon of air leakage between the blocking plate and the connecting ring is effectively avoided, so that the fixed top plate reaches a completely sealed state.

Description

Technical Field

[0001] The utility model relates to a sealing structure, in particular to a metal heat treatment vacuum furnace sealing structure, belonging to the technical field of vacuum furnace sealing. Background Art

[0002] At present, metal heat treatment is a process in which a metal workpiece is heated to a suitable temperature in a certain medium, kept at this temperature for a certain period of time, and then cooled at different speeds in different media to control its performance by changing the surface or internal microstructure of the metal material. Vacuum furnaces are often used in metal heat treatment.

[0003] After searching, a Chinese patent with publication number CN213454948U discloses a sealing structure for a multi-chamber vacuum furnace, which includes a furnace body, an upper mounting seat fixedly arranged on the top of the furnace body, and a top plate fixedly arranged on the top of the upper mounting seat. The utility model can avoid the situation that the vacuum heat treatment effect of the metal material or metal workpiece inside the furnace body is affected by poor sealing.

[0004] Although the above scheme can avoid the situation where the metal material or metal workpiece inside the furnace body is not properly vacuum heat treated, the furnace door and the vacuum furnace in the above patent are in sliding contact, and only the two furnace doors are slid to be closed. During the closing process, there will be a gap between the two doors, resulting in poor sealing of the furnace body when it is closed. For this reason, we provide a metal heat treatment vacuum furnace sealing structure to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The purpose of the utility model is to provide a metal heat treatment vacuum furnace sealing structure in order to solve the above problems, so as to solve the problem of poor sealing of the furnace body when it is closed in the prior art.

[0007] (II) Technical solution

[0008] The utility model is implemented through the following technical scheme: a metal heat treatment vacuum furnace sealing structure, comprising a fixed top plate, the outer surface of the fixed top plate is fixedly connected with a connecting ring, a sealing mechanism is arranged outside the fixed top plate, the sealing mechanism comprises a cover plate, the outer surface of the cover plate is fixedly connected with a blocking plate and a sealing ring, the outer surfaces of the blocking plate and the sealing ring are both slidably connected with the connecting ring, the inner wall of the cover plate is rotatably connected with a rotating rod 1, the outer surface of the rotating rod 1 is rotatably connected with a swinging plate, the inner wall of the swinging plate is rotatably connected with a rotating rod 2, and the outer surface of the rotating rod 2 is rotatably connected with a movable plate.

[0009] Preferably, the outer surface of the rotating rod 2 is fixedly connected with a connecting plate, the outer surface of the fixed top plate is fixedly connected with a sliding frame, the inner wall of the sliding frame is slidably connected to the outer surfaces of the rotating rod 1 and the rotating rod 2, and the inner wall of the sliding frame is provided with a groove. When the rotating rod 1 slides into the groove, the swing plate and the movable plate are perpendicular to each other, so that the blocking plate and the sealing ring will slide into the interior of the connecting ring.

[0010] Preferably, the inner wall of the sliding frame is fixedly connected with a cylinder, the telescopic end of the cylinder is fixedly connected to the connecting plate, the inner wall of the fixed top plate is fixedly connected with the furnace body, the outer surface of the furnace body is fixedly connected to the connecting ring, the outer surface of the fixed top plate is installed with a control button of the cylinder, and a support plate is fixedly installed on the bottom of the furnace body, so that the furnace body is more stable when working.

[0011] Preferably, a vacuum pumping mechanism is provided outside the fixed top plate, and the vacuum pumping mechanism includes a connecting pipe 1, one end of which is fixedly connected to the furnace body, and a sealing sleeve is directly fixedly installed between the connecting pipe 1 and the furnace body, which can effectively prevent air leakage from the furnace body.

[0012] Preferably, one end of the connecting pipe away from the furnace body is fixedly connected to a collecting box, the outer surface of the collecting box is fixedly connected to the fixed top plate, and the collecting box is fixedly connected to the fixed top plate by fixing bolts, which facilitates the disassembly and assembly of the collecting box and effectively provides fixed support for the collecting box.

[0013] Preferably, a fixing block is fixedly connected to the inner wall of the collecting box, and a sliding plate is slidably connected to the inner wall of the collecting box. The setting of the fixing block effectively prevents the sliding plate from moving downward, thereby avoiding the occurrence of air backflow.

[0014] Preferably, a spring is fixedly connected to the outer surface of the slide plate, and one end of the spring away from the slide plate is fixedly connected to the collecting box, so that the slide plate can be effectively pulled back to a limited position through the resilience of the spring.

[0015] Preferably, the outer surface of the collecting box is fixedly connected to connecting pipe 2, the top surface of the fixed top plate is fixedly connected to an air pump, the input end of the air pump and connecting pipe 2 are fixedly connected, and the setting of the air pump can effectively extract the air inside the furnace body and discharge it outward.

[0016] The utility model provides a metal heat treatment vacuum furnace sealing structure, which has the following beneficial effects:

[0017] 1. The sealing structure of the metal heat treatment vacuum furnace is arranged through the cooperation of the cover plate, the blocking plate, the sealing ring, the rotating rod 1, the swing plate, the rotating rod 2, the movable plate, the connecting plate, the sliding frame and the cylinder. By opening the operation of the cylinder, the connecting plate is pushed downward, which can effectively drive the blocking plate and the sealing ring on the outer surface of the cover plate to slide into the interior of the connecting ring, thereby realizing that the utility model can completely seal the connecting ring through the blocking of the blocking plate and the surrounding of the blocking plate around the sealing ring, effectively avoiding the occurrence of air leakage between the blocking plate and the connecting ring, so that the fixed top plate reaches a completely sealed state.

[0018] 2. The sealing structure of the metal heat treatment vacuum furnace is arranged through the coordinated setting of connecting pipe 1, collecting box, fixing block, slide plate, spring, connecting pipe 2 and air pump. By turning on the air pump and coordinating the connection between connecting pipe 1 and the furnace body, the air inside the furnace body is effectively extracted by lifting the slide plate upwards, thereby realizing that after the air inside the furnace body is evacuated by the air pump, the slide plate can be effectively pulled back to its original position by the resilience of the spring, avoiding the need to pull the air pump out of the furnace body after the vacuum pumping is completed, resulting in air leakage, and further making the device more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the sealing mechanism of the utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the sliding frame of the utility model;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the vacuum pumping mechanism of the utility model.

[0023]

Main component symbol description

[0024] 1. Fix the top plate; 2. Connect the ring;

[0025] 3. Sealing mechanism; 301. Cover plate; 302. Blocking plate; 303. Sealing ring; 304. Rotating rod 1; 305. Swinging plate; 306. Rotating rod 2; 307. Moving plate; 308. Connecting plate; 309. Sliding frame; 310. Cylinder;

[0026] 4. Furnace body;

[0027] 5. Vacuum extraction mechanism; 501. Connecting pipe 1; 502. Collecting box; 503. Fixed block; 504. Slide plate; 505. Spring; 506. Connecting pipe 2; 507. Air pump. DETAILED DESCRIPTION

[0028] The embodiment of the utility model provides a sealing structure of a metal heat treatment vacuum furnace.

[0029] See also Figure 1 , Figure 2 and Figure 3 , including a fixed top plate 1, a power supply is installed above the fixed top plate 1, which can supply power to the electrical equipment in this application, the outer surface of the fixed top plate 1 is fixedly connected to a connecting ring 2, a sealing mechanism 3 is arranged on the outside of the fixed top plate 1, the sealing mechanism 3 includes a cover plate 301, the outer surface of the cover plate 301 is fixedly connected to a blocking plate 302 and a sealing ring 303, the outer surfaces of the blocking plate 302 and the sealing ring 303 are both slidably connected to the connecting ring 2, and the opening of the connecting ring 2 is effectively sealed by inserting the blocking plate 302 and the sealing ring 303 into the inner wall of the connecting ring 2.

[0030] The inner wall of the cover 301 is rotatably connected to a rotating rod 1 304, the outer surface of the rotating rod 1 304 is rotatably connected to a swing plate 305, the inner wall of the swing plate 305 is rotatably connected to a rotating rod 2 306, and the outer surface of the rotating rod 2 306 is rotatably connected to a moving plate 307. The swing plate 305 is driven to move by the moving plate 307, so that the swing plate 305 and the moving plate 307 are perpendicular to each other, thereby effectively changing the horizontal position of the cover 301.

[0031] The outer surface of the second rotating rod 306 is fixedly connected with a connecting plate 308, and the outer surface of the fixed top plate 1 is fixedly connected with a sliding frame 309. The inner wall of the sliding frame 309 is slidably connected to the outer surfaces of the rotating rod 1 304 and the second rotating rod 306. The inner wall of the sliding frame 309 is provided with a groove. When the rotating rod 1 304 slides into the groove, the swing plate 305 and the movable plate 307 are in a perpendicular state to each other, so that the blocking plate 302 and the sealing ring 303 will slide into the interior of the connecting ring 2.

[0032] The inner wall of the sliding frame 309 is fixedly connected to the cylinder 310, the telescopic end of the cylinder 310 is fixedly connected to the connecting plate 308, the inner wall of the fixed top plate 1 is fixedly connected to the furnace body 4, the outer surface of the furnace body 4 is fixedly connected to the connecting ring 2, the outer surface of the fixed top plate 1 is installed with the control button of the cylinder 310, and the bottom of the furnace body 4 is fixedly installed with a support plate, which makes the furnace body 4 more stable during operation.

[0033] See also Figure 4 A vacuum pumping mechanism 5 is arranged outside the fixed top plate 1, and the vacuum pumping mechanism 5 includes a connecting pipe 501, one end of which is fixedly connected to the furnace body 4, and a sealing sleeve is directly fixedly installed between the connecting pipe 501 and the furnace body 4, which can effectively prevent air leakage of the furnace body 4.

[0034] One end of the connecting pipe 501 away from the furnace body 4 is fixedly connected to the collecting box 502. The outer surface of the collecting box 502 is fixedly connected to the fixed top plate 1. The collecting box 502 is fixedly connected to the fixed top plate 1 by fixing bolts, which facilitates the disassembly and assembly of the collecting box 502 and effectively provides fixed support for the collecting box 502.

[0035] The inner wall of the collecting box 502 is fixedly connected with a fixing block 503, and the inner wall of the collecting box 502 is slidably connected with a slide plate 504. The setting of the fixing block 503 effectively prevents the slide plate 504 from moving downward, thereby avoiding the occurrence of air backflow.

[0036] A spring 505 is fixedly connected to the outer surface of the slide plate 504 , and one end of the spring 505 away from the slide plate 504 is fixedly connected to the collecting box 502 . The slide plate 504 can be effectively pulled back to a limited position through the resilience of the spring 505 .

[0037] The outer surface of the collecting box 502 is fixedly connected to the connecting pipe 2 506, and the top surface of the fixed top plate 1 is fixedly connected to the air pump 507. The input end of the air pump 507 is fixedly connected to the connecting pipe 2 506. Through the setting of the air pump 507, the air inside the furnace body 4 can be effectively extracted and discharged outward.

[0038] The cylinder 310 and the air pump 507 in the present application are both common electrical devices in the prior art, and the present application will not elaborate on their models or internal structures.

[0039] Working principle: by starting the operation of the cylinder 310, it drives the connecting plate 308 to move downward, and the movement of the connecting plate 308 drives the rotating rod 2 306 in the inner wall of the movable plate 307 to slide downward in the inner wall of the sliding frame 309, and the rotating rod 2 306 moves downward to drive the rotating rod 1 304 in the inner wall of the swing plate 305 to slide in the inner wall of the sliding frame 309, and the rotating rod 1 304 moves downward to drive the blocking plate 302 and the sealing ring 303 on the outer surface of the cover plate 301 to move downward, and when the rotating rod 1 304 slides to the groove in the inner wall of the sliding frame 309, it effectively drives the swing plate 305 to swing, and when the swing plate 305 swings to a vertical state with the movable plate 307, the blocking plate 302 and the sealing ring 303 will be slid into the inner wall of the connecting ring 2, thereby effectively and completely sealing the fixed top plate 1, and at this time, the external power is turned on to start the operation of the air pump 507. The air in the furnace body 4 is effectively drawn into the interior of the collecting box 502 through the connecting pipe 1 501. The continuous pumping of the air pump 507 will cause the air in the collecting box 502 to continuously push the slide plate 504 upward. The slide plate 504 moves upward, causing the spring 505 to deform until the slide plate 504 is pushed above the exhaust port of the collecting box 502. At this time, the air will be drawn into the interior of the air pump 507 from the exhaust port of the collecting box 502 through the connecting pipe 2 506 and discharged outward. When the interior of the furnace body 4 is evacuated to a vacuum state and the air pump 507 is turned off, the slide plate 504 is no longer subject to the upward driving force. With the resilience of the spring 505, the slide plate 504 is effectively pushed downward and pulled back to its original position, avoiding the need to pull out the air pump 507 from the interior of the furnace body 4 after the vacuum pumping of the furnace body 4 is completed, resulting in air leakage, thereby further making the device more practical.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A sealing structure for a metal heat treatment vacuum furnace, comprising a fixed top plate (1), characterized in that: The outer surface of the fixed top plate (1) is fixedly connected to a connecting ring (2); a sealing mechanism (3) is arranged outside the fixed top plate (1); the sealing mechanism (3) comprises a cover plate (301); the outer surface of the cover plate (301) is fixedly connected to a blocking plate (302) and a sealing ring (303); the outer surfaces of the blocking plate (302) and the sealing ring (303) are both slidably connected to the connecting ring (2); the inner wall of the cover plate (301) is rotatably connected to a rotating rod 1 (304); the outer surface of the rotating rod 1 (304) is rotatably connected to a swing plate (305); the inner wall of the swing plate (305) is rotatably connected to a rotating rod 2 (306); the outer surface of the rotating rod 2 (306) is rotatably connected to a movable plate (307).

2. A metal heat treatment vacuum furnace sealing structure according to claim 1, characterized in that: The outer surface of the second rotating rod (306) is fixedly connected to a connecting plate (308), the outer surface of the fixed top plate (1) is fixedly connected to a sliding frame (309), and the inner wall of the sliding frame (309) is slidably connected to the outer surfaces of the first rotating rod (304) and the second rotating rod (306).

3. A metal heat treatment vacuum furnace sealing structure according to claim 2, characterized in that: The inner wall of the sliding frame (309) is fixedly connected to a cylinder (310), the telescopic end of the cylinder (310) is fixedly connected to a connecting plate (308), the inner wall of the fixed top plate (1) is fixedly connected to a furnace body (4), and the outer surface of the furnace body (4) is fixedly connected to a connecting ring (2).

4. The metal heat treatment vacuum furnace sealing structure according to claim 1, characterized in that: A vacuum pumping mechanism (5) is arranged outside the fixed top plate (1), and the vacuum pumping mechanism (5) comprises a connecting pipe (501), one end of which is fixedly connected to the furnace body (4).

5. A metal heat treatment vacuum furnace sealing structure according to claim 4, characterized in that: One end of the connecting pipe 1 (501) away from the furnace body (4) is fixedly connected to a current collecting box (502), and the outer surface of the current collecting box (502) is fixedly connected to the fixed top plate (1).

6. A metal heat treatment vacuum furnace sealing structure according to claim 5, characterized in that: A fixing block (503) is fixedly connected to the inner wall of the current collecting box (502), and a sliding plate (504) is slidably connected to the inner wall of the current collecting box (502).

7. A metal heat treatment vacuum furnace sealing structure according to claim 6, characterized in that: A spring (505) is fixedly connected to the outer surface of the slide plate (504), and one end of the spring (505) away from the slide plate (504) is fixedly connected to the collecting box (502).

8. The metal heat treatment vacuum furnace sealing structure according to claim 5, characterized in that: The outer surface of the collecting box (502) is fixedly connected to a second connecting pipe (506), the top surface of the fixed top plate (1) is fixedly connected to an air pump (507), and the input end of the air pump (507) is fixedly connected to the second connecting pipe (506).

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