Vacuum heat treatment heating furnace

Abstract

The invention relates to the technical field of vacuum heating, and discloses a vacuum heat treatment heating furnace which comprises a vacuum cavity, supporting frames fixedly connected to the two ends of the outer wall of the vacuum cavity correspondingly, a cabinet door rotationally connected to one side of the outer wall of the vacuum cavity, heater rings fixedly connected to the two ends of the inner wall of the vacuum cavity correspondingly, and a vacuum heat treatment mechanism. The vacuum heat treatment mechanism comprises a supporting rod fixedly connected to the bottom of the inner wall of the heater ring, the workpiece strip is placed on the top of the bearing table, the cabinet door is closed, the interior of the vacuum cavity is gradually converted into a vacuum environment, meanwhile, the heater ring is started, the interior of the vacuum cavity is heated, and therefore the workpiece strip is heated; in the process that the interior of the vacuum cavity is gradually converted into a vacuum environment, the two transverse rods slide towards the interior of the vacuum cavity under the influence of vacuum pressure, and when the transverse rods do not slide, the interior of the vacuum cavity becomes the vacuum environment, so that the accuracy of vacuum in the vacuum cavity is measured.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum heating, in particular to a vacuum heat treatment heating furnace. Background Art

[0002] Vacuum heat treatment is a new type of heat treatment technology that combines vacuum technology with heat treatment technology. The vacuum environment of vacuum heat treatment refers to an atmosphere environment below one atmospheric pressure, including low vacuum, medium vacuum, high vacuum and ultra-high vacuum. Vacuum heat treatment actually also belongs to atmosphere controlled heat treatment. Vacuum heat treatment refers to the heat treatment process that is carried out in whole or in part under a vacuum state, which greatly improves the quality of heat treatment. Compared with conventional heat treatment, vacuum heat treatment can achieve no oxidation, no decarburization, no carburization, can remove phosphorus chips on the surface of the workpiece, and has the functions of degreasing and degassing, thereby achieving the effect of surface brightening and purification; During the vacuum heat treatment process, since the workpiece needs to be placed on the carrier, the bottom of the workpiece cannot be heat treated during the heat treatment process, which reduces the heat treatment effect of the workpiece and affects the quality of the workpiece after heat treatment. Summary of the invention

[0003] The object of the present invention is to provide a vacuum heat treatment heating furnace to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a vacuum heat treatment heating furnace, comprising a vacuum chamber, wherein two ends of the outer wall of the vacuum chamber are respectively fixedly connected with support frames, a cabinet door is rotatably connected to one side of the outer wall of the vacuum chamber, and two ends of the inner wall of the vacuum chamber are respectively fixedly connected with heater rings. The present invention also comprises a vacuum heat treatment mechanism, wherein the vacuum heat treatment mechanism comprises a support rod fixedly connected to the bottom of the inner wall of the heater ring, the top outer wall of the support rod is slidably connected with a bearing platform, the two ends of the bottom of the bearing platform are respectively fixedly connected with a first spring, the bottom end of the first spring is fixedly connected to the bottom of the inner wall of the heater ring, cross bars are respectively penetrated and slidably connected on both sides of the vacuum chamber, and a falling component is arranged on one side of the cross bar.

[0005] Furthermore, the falling assembly includes a second spring fixedly connected to the side wall of one end of the cross bar, one end of the second spring is fixedly connected to one side of the outer wall of the vacuum chamber, the outer wall of one end of the cross bar is fixedly connected to a fixing frame, the fixing frame is arranged inside the vacuum chamber, one end of the fixing frame is fixedly connected to a fixing block, both sides of the bottom of the inner wall of the vacuum chamber are respectively fixedly connected to L-shaped frames, and the outer wall of one end of the L-shaped frame is slidably connected to a first slider.

[0006] Furthermore, a first return spring is fixedly connected to one side of the first slider, one end of the first return spring is fixedly connected to one side of the middle end of the L-shaped frame, the bottom of the first slider is rotatably connected to the first rotating plate, the end of the first rotating plate away from the first slider is rotatably connected to the lifting bar, the inner wall of the lifting bar is slidably connected to the outer wall of one end of the L-shaped frame, and the top of the lifting bar is fixedly connected to the bottom of the supporting platform.

[0007] Furthermore, a clamping assembly is provided at one end of the cross bar, and the clamping assembly includes a clamping shell fixedly connected to one end of the cross bar, the clamping shell is arranged inside the vacuum chamber, the inner wall of the clamping shell is slidably connected to a sliding plate, one side of the sliding plate is fixedly connected to a compression spring, one end of the compression spring is fixedly connected to one side of the inner wall of the clamping shell, the side of the sliding plate away from the compression spring is fixedly connected to a connecting rod, and the end of the connecting rod away from the sliding plate is rotatably connected to a rotating plate.

[0008] Furthermore, the two ends of the rotating plate on the side away from the connecting rod are respectively rotatably connected to the second rotating plate, the end of the second rotating plate away from the rotating plate is rotatably connected to the second slider, the inner wall of the second slider is slidably connected to the limiting rod, one end of the limiting rod is fixedly connected to one side of the inner wall of the clamping shell, one side of the second slider is fixedly connected to the second return spring, and one end of the second return spring is fixedly connected to the side wall of one end of the limiting rod.

[0009] Furthermore, an auxiliary component is provided on one side of the second slider, and the auxiliary component includes an L-shaped rod fixedly connected to one side of the second slider, one end of the L-shaped rod passes through the clamping shell and extends to the outside of the clamping shell, and one end of the L-shaped rod is fixedly connected to the arc shell.

[0010] Furthermore, a rotating sleeve is rotatably connected to one side of the inner wall of the arc-shaped shell, an L-shaped bar is fixedly connected to one side of the middle end of the L-shaped rod, a round block is fixedly connected to the side wall of one end of the L-shaped bar, a rotating ring is rotatably connected to one side of the clamping shell, the inner wall of the rotating ring is rotatably connected to the outer wall of the cross bar, and arc grooves are respectively provided at both ends of one side of the rotating ring.

[0011] Furthermore, the outer wall of the round block is slidably connected to the inner wall of the arc groove, connecting strips are fixedly connected on both sides of the outer wall of the rotating ring, the side wall of the connecting strip at one end away from the rotating ring is fixedly connected to the telescopic rod, the movable end of the telescopic rod is fixedly connected to the fixed ring, and the inner wall of the fixed ring is fixedly connected to the outer wall of the rotating plate.

[0012] Furthermore, a sealing assembly is provided on the outer wall of the clamping shell, and the sealing assembly includes a double-headed tube connected at both ends of the outer wall of the clamping shell, one end of the double-headed tube away from the clamping shell is connected to a conversion box, the top of the conversion box is fixedly connected to the top of the inner wall of the vacuum chamber, one side of the conversion box is connected to a circular tube, one end of the circular tube is connected to a sealing ring, and the outer wall of the sealing ring is fixedly connected to the inner wall of one end of the vacuum chamber.

[0013] The present invention has the following beneficial effects: (1) The present invention places the workpiece strip on the top of the carrier platform, closes the cabinet door, and gradually converts the interior of the vacuum chamber into a vacuum environment. At the same time, the heater ring is started to heat the interior of the vacuum chamber, thereby performing a heating treatment on the workpiece strip. When the interior of the vacuum chamber is gradually converted into a vacuum environment, the two cross bars slide toward the interior of the vacuum chamber under the influence of the vacuum pressure. When the cross bars stop sliding, it can be said that the interior of the vacuum chamber has become a vacuum environment. The cross bars are used to measure the accuracy of the vacuum inside the vacuum chamber. The clamping shell drives the sliding plate to move, the sliding plate drives the connecting rod to move, and the connecting rod drives the connecting rod to move. The connecting rod drives the rotating plate to move, and the two rotating plates approach each other, and the two rotating plates clamp the workpiece, the cross bar drives the fixed frame to move, and the fixed frame drives the fixed block to move. During the movement of the fixed block, it will contact the first slider, so that the first slider slides on the outer wall of the L-shaped frame, and the first slider drives the first rotating plate to move. Affected by the setting of the L-shaped frame, the first rotating plate drives the lifting bar to move downward along the outer wall of the L-shaped frame, and the lifting bar drives the bearing platform to move downward, so that the workpiece can be suspended in the center of the vacuum chamber, thereby performing heat treatment on the entire workpiece, thereby expanding the heat treatment range of the workpiece.

[0014] (2) In the present invention, when the two rotating plates are clamping the workpiece, the reaction force of the workpiece causes the rotating plate to move, and the rotating plate drives the connecting rod to move, and the connecting rod drives the sliding plate to move toward the inside of the clamping shell, and the sliding plate drives the second rotating plate to move, and is limited by the limiting rod. The second rotating plate drives the second sliding block to slide along the outer wall of the limiting rod, and the second sliding block drives the L-shaped rod to move, and the L-shaped rod drives the arc shell to move, and the arc shell drives the rotating sleeve to move, and the two rotating sleeves approach each other, so that the rotating sleeve clamps the outer walls of the two ends of the workpiece, further improving the stability of the workpiece during heat treatment and preventing the workpiece from falling during heat treatment.

[0015] (3) During the movement of the L-shaped rod of the present invention, the L-shaped rod drives the L-shaped bar to move, and the L-shaped bar drives the round block to move. Due to the arc setting of the arc groove, the rotating ring rotates along the arc trajectory of the arc groove during the movement of the round block. During the rotation of the rotating ring around the cross bar, the rotating ring drives the connecting bar to rotate, the connecting bar drives the telescopic rod to rotate, the telescopic rod drives the fixed ring to rotate, and the fixed ring drives the rotating plate to rotate. During the rotation of the rotating plate, the clamped workpiece rotates, so that the workpiece can be heated in all directions by the heater ring, further improving the heat treatment efficiency of the workpiece. When the sliding plate moves toward the inside of the clamping shell, the airflow inside the clamping shell will enter the inside of the double-headed tube, the airflow will enter the inside of the conversion box through the double-headed tube, the airflow will enter the inside of the circular tube through the conversion box, and the airflow will enter the inside of the sealing ring through the circular tube, causing the sealing ring to expand. During the expansion of the sealing ring, the sealing ring and the cabinet door fit more closely, which can improve the sealing effect of the cabinet door on the vacuum chamber and enhance the vacuum effect inside the vacuum chamber.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall side structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the vacuum chamber of the present invention; Figure 4 It is a schematic diagram of the side structure of the conversion box of the present invention; Figure 5 It is a schematic diagram of the side structure of the double-ended pipe of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the clamping shell of the present invention; Figure 7 It is a schematic diagram of the side structure of the rotating ring of the present invention; Figure 8 For the present invention Figure 3 A is an enlarged view of the middle image.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1, vacuum chamber; 2, support frame; 3, cabinet door; 4, heater ring; 5, vacuum heat treatment mechanism; 51, support rod; 52, first spring; 53, bearing platform; 54, cross bar; 55, drop assembly; 56, clamping assembly; 57, auxiliary assembly; 58, sealing assembly; 551, second spring; 552, fixed frame; 553, fixed block; 554, L-shaped frame; 555, first slider; 557, first rotating plate; 558, lifting bar; 556, first return spring; 561, clamping shell; 56 2. Sliding plate; 563. Extrusion spring; 564. Connecting rod; 565. Rotating plate; 566. Second rotating plate; 568. Limiting rod; 567. Second sliding block; 569. Second return spring; 571. L-shaped rod; 572. Arc shell; 573. Rotating sleeve; 574. L-shaped strip; 575. Round block; 576. Rotating ring; 577. Arc groove; 578. Connecting strip; 579. Telescopic rod; 5710. Fixed ring; 581. Double-headed tube; 582. Conversion box; 583. Round tube; 584. Sealing ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1, please refer to Figure 1-Figure 8 As shown, the present invention is a vacuum heat treatment heating furnace, comprising a vacuum chamber 1, the purpose of which is to generate a vacuum environment, the two ends of the outer wall of the vacuum chamber 1 are respectively fixedly connected to a support frame 2, one side of the outer wall of the vacuum chamber 1 is rotatably connected to a cabinet door 3, and the two ends of the inner wall of the vacuum chamber 1 are respectively fixedly connected to a heater ring 4, the purpose of which is to generate heat, and further comprising; The vacuum heat treatment mechanism 5 comprises a support rod 51 fixedly connected to the bottom of the inner wall of the heater ring 4, and a bearing platform 53 is slidably connected to the outer wall of the top end of the support rod 51. The two ends of the bottom of the bearing platform 53 are respectively fixedly connected with a first spring 52. The purpose of this arrangement is to reset. The bottom end of the first spring 52 is fixedly connected to the bottom of the inner wall of the heater ring 4. The two sides of the vacuum chamber 1 are respectively penetrated and slidably connected with cross bars 54. A drop assembly 55 is provided on one side of the cross bar 54. When in use, the workpiece strip is placed on the top of the bearing platform 53, and the cabinet door 3 is closed, so that the interior of the vacuum chamber 1 is gradually converted into a vacuum environment. At the same time, the heater ring 4 is started to heat the interior of the vacuum chamber 1, thereby heating the workpiece strip. When the interior of the vacuum chamber 1 is gradually converted into a vacuum environment, the two cross bars 54 are affected by the vacuum pressure to slide into the interior of the vacuum chamber 1. When the cross bars 54 are no longer sliding, it can be explained that the interior of the vacuum chamber 1 has become a vacuum environment, which is used to measure the accuracy of the vacuum inside the vacuum chamber 1.

[0022] The falling assembly 55 includes a second spring 551 fixedly connected to the side wall of one end of the cross bar 54, one end of the second spring 551 is fixedly connected to one side of the outer wall of the vacuum chamber 1, the outer wall of one end of the cross bar 54 is fixedly connected to a fixing frame 552, the fixing frame 552 is arranged inside the vacuum chamber 1, one end of the fixing frame 552 is fixedly connected to a fixing block 553, L-shaped frames 554 are respectively fixedly connected to the bottom of the inner wall of the vacuum chamber 1, and the outer wall of one end of the L-shaped frame 554 is slidably connected to a first slider 555.

[0023] A first return spring 556 is fixedly connected to one side of the first slider 555, one end of the first return spring 556 is fixedly connected to one side of the middle end of the L-shaped frame 554, the bottom of the first slider 555 is rotatably connected to a first rotating plate 557, the end of the first rotating plate 557 away from the first slider 555 is rotatably connected to a lifting bar 558, the inner wall of the lifting bar 558 is slidably connected to the outer wall of one end of the L-shaped frame 554, and the top of the lifting bar 558 is fixedly connected to the bottom of the supporting platform 53.

[0024] A clamping assembly 56 is provided at one end of the cross bar 54, and the clamping assembly 56 includes a clamping shell 561 fixedly connected to one end of the cross bar 54, and the clamping shell 561 is arranged inside the vacuum chamber 1, and the inner wall of the clamping shell 561 is slidably connected to a sliding plate 562, one side of the sliding plate 562 is fixedly connected to a compression spring 563, one end of the compression spring 563 is fixedly connected to one side of the inner wall of the clamping shell 561, the side of the sliding plate 562 away from the compression spring 563 is fixedly connected to a connecting rod 564, and the end of the connecting rod 564 away from the sliding plate 562 is rotatably connected to a rotating plate 565.

[0025] The two ends of the rotating plate 565 on the side away from the connecting rod 564 are respectively rotatably connected with the second rotating plate 566, and the end of the second rotating plate 566 away from the rotating plate 565 is rotatably connected with the second slider 567, and the inner wall of the second slider 567 is slidably connected to the limiting rod 568, so as to prevent the second slider 567 from separating from the limiting rod 568, one end of the limiting rod 568 is fixedly connected to one side of the inner wall of the clamping shell 561, and one side of the second slider 567 is fixedly connected with a second return spring 569, and one end of the second return spring 569 is fixedly connected to the side wall of one end of the limiting rod 568, the cross bar 54 drives the clamping shell 561 to move, the clamping shell 561 drives the sliding plate 562 to move, the sliding plate 562 drives the connecting rod 564 to move, and the connecting rod 564 drives the rotating plate 565 to move. The movable plate 565 moves, and the two rotating plates 565 approach each other. The two rotating plates 565 clamp the workpiece, and the cross bar 54 drives the fixed frame 552 to move, and the fixed frame 552 drives the fixed block 553 to move. During the movement of the fixed block 553, it will contact the first slider 555, so that the first slider 555 slides on the outer wall of the L-shaped frame 554, and the first slider 555 drives the first rotating plate 557 to move. Affected by the setting of the L-shaped frame 554, the first rotating plate 557 drives the lifting bar 558 to move downward along the outer wall of the L-shaped frame 554, and the lifting bar 558 drives the bearing platform 53 to move downward, so that the workpiece can be suspended at the center of the vacuum chamber 1, so that the workpiece is heat treated as a whole, thereby expanding the heat treatment range of the workpiece.

[0026] In embodiment 2, an auxiliary component 57 is provided on one side of the second slider 567, and the auxiliary component 57 includes an L-shaped rod 571 fixedly connected to one side of the second slider 567, one end of the L-shaped rod 571 passes through the clamping shell 561 and extends to the outside of the clamping shell 561, and one end of the L-shaped rod 571 is fixedly connected to an arc shell 572.

[0027] A rotating sleeve 573 is rotatably connected to one side of the inner wall of the arc-shaped shell 572, an L-shaped bar 574 is fixedly connected to one side of the middle end of the L-shaped rod 571, a round block 575 is fixedly connected to the side wall of one end of the L-shaped bar 574, a rotating ring 576 is rotatably connected to one side of the clamping shell 561, the inner wall of the rotating ring 576 is rotatably connected to the outer wall of the cross bar 54, and arc-shaped grooves 577 are respectively provided at both ends of one side of the rotating ring 576.

[0028] The outer wall of the round block 575 is slidably connected to the inner wall of the arc groove 577, and connecting strips 578 are fixedly connected to the outer wall of the rotating ring 576 on both sides. The side wall of the connecting strip 578 away from the rotating ring 576 is fixedly connected to a telescopic rod 579. The telescopic rod 579 can be telescopically moved by the movement of the fixed ring 5710. The movable end of the telescopic rod 579 is fixedly connected to the fixed ring 5710. The inner wall of the fixed ring 5710 is fixedly connected to the outer wall of the rotating plate 565. The setting of the rotating sleeve 573 can enable the fixed ring 5710 to drive the rotating plate 565 to rotate. When the rotating plate 565 drives the workpiece to rotate, the sliding friction between the workpiece and the rotating sleeve 573 is converted into rolling friction, thereby improving the rotation effect of the workpiece.

[0029] The outer wall of the clamping shell 561 is provided with a sealing assembly 58, and the sealing assembly 58 includes a double-headed tube 581 connected to both ends of the outer wall of the clamping shell 561, and one end of the double-headed tube 581 away from the clamping shell 561 is connected to a conversion box 582, and the top of the conversion box 582 is fixedly connected to the top of the inner wall of the vacuum chamber 1. One side of the conversion box 582 is connected to a round tube 583, and one end of the round tube 583 is connected to a sealing ring 584, and the outer wall of the sealing ring 584 is fixedly connected to the inner wall of one end of the vacuum chamber 1. When the sliding plate 562 moves toward the clamping shell 561, the sealing ring 584 is fixedly connected to the inner wall of one end of the vacuum chamber 1. When moving internally, the airflow inside the clamping shell 561 will enter the interior of the double-headed tube 581, and the airflow will enter the interior of the conversion box 582 through the double-headed tube 581, and the airflow will enter the interior of the circular tube 583 through the conversion box 582, and the airflow will enter the interior of the sealing ring 584 through the circular tube 583, so that the sealing ring 584 will expand. During the expansion process of the sealing ring 584, the sealing ring 584 and the cabinet door 3 will fit more closely, which can improve the sealing effect of the cabinet door 3 on the vacuum chamber 1 and enhance the vacuum effect inside the vacuum chamber 1.

[0030] When in use, the workpiece strip is placed on the top of the carrier 53, and the cabinet door 3 is closed, so that the interior of the vacuum chamber 1 is gradually converted into a vacuum environment, and the heater ring 4 is started at the same time to heat the interior of the vacuum chamber 1, so as to heat the workpiece strip. When the interior of the vacuum chamber 1 is gradually converted into a vacuum environment, the two cross bars 54 are affected by the vacuum pressure and slide toward the interior of the vacuum chamber 1. When the cross bars 54 are no longer sliding, it can be said that the interior of the vacuum chamber 1 has become a vacuum environment. It is used to measure the accuracy of the vacuum inside the vacuum chamber 1. The cross bars 54 drive the clamping shell 561 to move, the clamping shell 561 drives the sliding plate 562 to move, the sliding plate 562 drives the connecting rod 564 to move, and the connecting rod 564 drives the rotating plate 565 to move. The two rotating plates 565 move, and the two rotating plates 565 approach each other. The two rotating plates 565 clamp the workpiece, and the cross bar 54 drives the fixed frame 552 to move, and the fixed frame 552 drives the fixed block 553 to move. During the movement of the fixed block 553, it will contact the first slider 555, so that the first slider 555 slides on the outer wall of the L-shaped frame 554, and the first slider 555 drives the first rotating plate 557 to move. Affected by the setting of the L-shaped frame 554, the first rotating plate 557 drives the lifting bar 558 to move downward along the outer wall of the L-shaped frame 554, and the lifting bar 558 drives the bearing platform 53 to move downward, so that the workpiece can be suspended at the center of the vacuum chamber 1, so that the workpiece is heat treated as a whole, thereby expanding the heat treatment range of the workpiece.

[0031] When the two rotating plates 565 are clamping the workpiece, the reaction force of the workpiece causes the rotating plate 565 to move, and the rotating plate 565 drives the connecting rod 564 to move, and the connecting rod 564 drives the sliding plate 562 to move toward the inside of the clamping shell 561, and the sliding plate 562 drives the second rotating plate 566 to move. Limited by the limiting rod 568, the second rotating plate 566 drives the second sliding block 567 to slide along the outer wall of the limiting rod 568, and the second sliding block 567 drives the L-shaped rod 571 to move, and the L-shaped rod 571 drives the arc shell 572 to move, and the arc shell 572 drives the rotating sleeve 573 to move, and the two rotating sleeves 573 approach each other, so that the rotating sleeve 573 clamps the outer walls of the two ends of the workpiece, further improving the stability of the workpiece during heat treatment and preventing the workpiece from falling during heat treatment.

[0032] During the movement of the L-shaped rod 571, the L-shaped rod 571 drives the L-shaped bar 574 to move, and the L-shaped bar 574 drives the round block 575 to move. Due to the arc setting of the arc groove 577, the round block 575 causes the rotating ring 576 to rotate along the arc track of the arc groove 577 during the movement. During the rotation of the rotating ring 576 around the cross bar 54, the rotating ring 576 drives the connecting bar 578 to rotate, the connecting bar 578 drives the telescopic rod 579 to rotate, the telescopic rod 579 drives the fixed ring 5710 to rotate, and the fixed ring 5710 drives the rotating plate 565 to rotate. During the rotation of the rotating plate 565, the clamped workpiece is rotated, so that the workpiece The heater ring 4 can perform all-round heating treatment on the workpiece, which further improves the heat treatment efficiency of the workpiece. When the sliding plate 562 moves toward the interior of the clamping shell 561, the airflow inside the clamping shell 561 will enter the interior of the double-headed tube 581, and the airflow will enter the interior of the conversion box 582 through the double-headed tube 581. The airflow will enter the interior of the circular tube 583 through the conversion box 582, and the airflow will enter the interior of the sealing ring 584 through the circular tube 583, so that the sealing ring 584 will expand. During the expansion of the sealing ring 584, the sealing ring 584 and the cabinet door 3 will fit more closely, which can improve the sealing effect of the cabinet door 3 on the vacuum chamber 1 and enhance the vacuum effect inside the vacuum chamber 1.

[0033] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A vacuum heat treatment heating furnace, comprising a vacuum chamber (1), characterized in that: The outer wall of the vacuum chamber (1) is respectively fixedly connected to a support frame (2), one side of the outer wall of the vacuum chamber (1) is rotatably connected to a cabinet door (3), and the inner wall of the vacuum chamber (1) is respectively fixedly connected to a heater ring (4), and further comprises: a vacuum heat treatment mechanism (5), the vacuum heat treatment mechanism (5) comprising a support rod (51) fixedly connected to the bottom of the inner wall of the heater ring (4), the top outer wall of the support rod (51) is slidably connected to a bearing platform (53), the bottom ends of the bearing platform (53) are respectively fixedly connected to a first spring (52), the bottom end of the first spring (52) is fixedly connected to the bottom of the inner wall of the heater ring (4), and the two sides of the vacuum chamber (1) respectively penetrate and slide. A cross bar (54) is connected, and a drop assembly (55) is provided on one side of the cross bar (54); the drop assembly (55) comprises a second spring (551) fixedly connected to a side wall of one end of the cross bar (54), one end of the second spring (551) is fixedly connected to a side wall of an outer wall of the vacuum chamber (1); a fixing frame (552) is fixedly connected to the outer wall of one end of the cross bar (54), the fixing frame (552) is arranged inside the vacuum chamber (1), one end of the fixing frame (552) is fixedly connected to a fixing block (553), two sides of the bottom of the inner wall of the vacuum chamber (1) are respectively fixedly connected to L-shaped frames (554), and a first sliding block (555) is slidably connected to the outer wall of one end of the L-shaped frame (554); A first return spring (556) is fixedly connected to one side of the first sliding block (555); one end of the first return spring (556) is fixedly connected to one side of the middle end of the L-shaped frame (554); a first rotating plate (557) is rotatably connected to the bottom of the first sliding block (555); an end of the first rotating plate (557) away from the first sliding block (555) is rotatably connected to a lifting bar (558); an inner wall of the lifting bar (558) is slidably connected to an outer wall at one end of the L-shaped frame (554); and a top of the lifting bar (558) is fixedly connected to the bottom of the bearing platform (53).

2. A vacuum heat treatment heating furnace according to claim 1, characterized in that: A clamping assembly (56) is provided at one end of the cross bar (54), and the clamping assembly (56) comprises a clamping shell (561) fixedly connected to one end of the cross bar (54); the clamping shell (561) is arranged inside the vacuum chamber (1); a sliding plate (562) is slidably connected to the inner wall of the clamping shell (561); a compression spring (563) is fixedly connected to one side of the sliding plate (562); one end of the compression spring (563) is fixedly connected to one side of the inner wall of the clamping shell (561); a connecting rod (564) is fixedly connected to the side of the sliding plate (562) away from the compression spring (563); and one end of the connecting rod (564) away from the sliding plate (562) is rotatably connected to a rotating plate (565).

3. A vacuum heat treatment heating furnace according to claim 2, characterized in that: The two ends of the rotating plate (565) on one side away from the connecting rod (564) are rotatably connected to the second rotating plate (566), and the end of the second rotating plate (566) away from the rotating plate (565) is rotatably connected to the second slider (567). The inner wall of the second slider (567) is slidably connected to a limiting rod (568), one end of the limiting rod (568) is fixedly connected to one side of the inner wall of the clamping shell (561), and one side of the second slider (567) is fixedly connected to a second return spring (569), and one end of the second return spring (569) is fixedly connected to the side wall of one end of the limiting rod (568).

4. A vacuum heat treatment heating furnace according to claim 3, characterized in that: An auxiliary component (57) is provided on one side of the second sliding block (567), and the auxiliary component (57) comprises an L-shaped rod (571) fixedly connected to one side of the second sliding block (567), one end of the L-shaped rod (571) passes through the clamping shell (561) and extends to the outside of the clamping shell (561), and one end of the L-shaped rod (571) is fixedly connected to the arc-shaped shell (572).

5. A vacuum heat treatment heating furnace according to claim 4, characterized in that: A rotating sleeve (573) is rotatably connected to one side of the inner wall of the arc-shaped shell (572); an L-shaped bar (574) is fixedly connected to one side of the middle end of the L-shaped rod (571); a round block (575) is fixedly connected to the side wall of one end of the L-shaped bar (574); a rotating ring (576) is rotatably connected to one side of the clamping shell (561); the inner wall of the rotating ring (576) is rotatably connected to the outer wall of the cross bar (54); and arc-shaped grooves (577) are respectively provided at both ends of one side of the rotating ring (576).

6. A vacuum heat treatment heating furnace according to claim 5, characterized in that: The outer wall of the round block (575) is slidably connected to the inner wall of the arc-shaped groove (577), and connecting strips (578) are fixedly connected to both sides of the outer wall of the rotating ring (576), and a telescopic rod (579) is fixedly connected to the side wall of one end of the connecting strip (578) away from the rotating ring (576), and a fixed ring (5710) is fixedly connected to the movable end of the telescopic rod (579), and the inner wall of the fixed ring (5710) is fixedly connected to the outer wall of the rotating plate (565).

7. The vacuum heat treatment heating furnace according to claim 6, characterized in that: The outer wall of the clamping shell (561) is provided with a sealing assembly (58), and the sealing assembly (58) comprises a double-headed tube (581) connected to both ends of the outer wall of the clamping shell (561), one end of the double-headed tube (581) away from the clamping shell (561) is connected to a conversion box (582), the top of the conversion box (582) is fixedly connected to the top of the inner wall of the vacuum chamber (1), one side of the conversion box (582) is connected to a round tube (583), one end of the round tube (583) is connected to a sealing ring (584), and the outer wall of the sealing ring (584) is fixedly connected to the inner wall of one end of the vacuum chamber (1).

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