Vacuum annealing furnace capable of accurately controlling temperature

Abstract

The utility model relates to the technical field of heat treatment processing, and discloses an accurate temperature control vacuum annealing furnace, which comprises a support, a control box and a motor, the control box and the motor are both installed on the upper surface of the support, the upper surface of the support is fixedly connected with a furnace body, the front end of the furnace body is hinged with a furnace door, and the furnace door is hinged with a furnace door. A sealing device is fixedly installed on the inner side of the furnace door and comprises a sealing ring, a sealing frame and a sealing plate. An existing sealing device is modified, the handle is rotated to drive the rotating shaft to rotate, the angle block and the side block seal the furnace body, when sealing is not needed and the furnace door needs to be opened, only the handle needs to be unlocked and rotated reversely, and at the moment, the angle block and the side block can retract towards the interior of the sealing device under the action of the spring; the angle blocks and the side blocks are not in contact friction with the furnace body, so that the heat preservation effect and the sealing effect of the sealing device on the annealing furnace are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment processing, and more specifically, to a vacuum annealing furnace with precise temperature control. Background Art

[0002] A vacuum annealing furnace is a device specially used for heat treatment of materials. It can heat and cool materials in a vacuum or protective gas environment. Its characteristic is that during the entire heat treatment process, the environmental pressure of the material is lower than the atmospheric pressure, thereby preventing the material from reacting with gases such as oxygen and nitrogen at high temperatures, reducing adverse reactions such as oxidation and nitridation, and improving the purity and performance of the material during the heat treatment process. During use, the vacuum annealing furnace needs to frequently open and close the sealing door, which causes frequent friction between the sealing device and the furnace body. After long-term use, the part of the sealing device in contact with the furnace body will wear, resulting in a loose seal, which ultimately makes the heat in the vacuum annealing furnace easily dissipate from the worn area when the vacuum annealing furnace is working, making the thermal insulation and sealing of the vacuum annealing furnace worse. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a vacuum annealing furnace with precise temperature control, which has the advantage of reducing the reduction of heat preservation performance and sealing performance caused by wear of the sealing device.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum annealing furnace with precise temperature control, comprising a bracket, a control box and a motor, wherein the control box and the motor are both mounted on the upper surface of the bracket, and the upper surface of the bracket is also fixedly connected to a furnace body, and an air extraction port and a feeding port are respectively provided at both ends of the furnace body, and a furnace door is hingedly connected to the front end of the furnace body, and a sealing device is fixedly installed on the inner side of the furnace door, and the sealing device comprises a sealing ring, a sealing frame and a sealing plate, one end of the sealing frame is fixedly connected to the inner side of the furnace door, and the sealing ring clamp Connected to the outer surface of the sealing frame, one side of the sealing plate is fixedly connected with a fixed block and a connecting column, the other end of the connecting column is fixedly connected to the inner side of the furnace door, the outer side of the fixed block is fixedly connected with a plurality of symmetrical telescopic rods, the telescopic ends of the telescopic rods are respectively connected to the sides of the corner block and the side block, one end of the fixed block is rotatably mounted with a rotating shaft, the outer surface of the rotating shaft is fixedly sleeved with a turntable, one side of the turntable is provided with a plurality of symmetrical limiting grooves, a connecting rod is slidably connected in the limiting groove, and the other end of the connecting rod is hinged to the side of the corner block.

[0005] Preferably, a plurality of symmetrical sliding grooves are provided on one side of the sealing plate fixedly connected to the connecting column, and sliding columns are fixedly connected on one side of the corner block and the side block close to the sealing plate, and the sliding columns are slidably connected in the sliding grooves.

[0006] Preferably, a spring is elastically connected between the fixing block and the corner block and the side block respectively, and the spring is sleeved on the outer surface of the telescopic rod.

[0007] Preferably, one end of the rotating shaft passes through the furnace door and is fixedly connected to a handle, a locking hole is provided on the handle, and a locking pin is fixedly sleeved in the locking hole.

[0008] Preferably, a plurality of symmetrical temperature sensing probes and heating rods are fixedly connected inside the furnace body, an annealing rack is also fixedly connected inside the furnace body, the top surface of the annealing rack is located on the same horizontal line as the bottom surface of the feeding port, and the exhaust port is connected to the motor through an exhaust pipe.

[0009] Preferably, the corner block and the side block have the same thickness, there is a gap between the sealing frame and the sealing plate, the width of the gap is the same as the thickness of the corner block and the side block, and the side surface of the fixed block is the same as the sum of the number of the corner blocks and the side blocks.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model modifies the existing sealing device so that when the sealing plate of the sealing device is worn due to frequent friction with the furnace body, resulting in a loose seal on the furnace body, the corner block is extended by turning the handle to drive the rotating shaft to rotate. At the same time, the movement of the corner block will drive the side block to move together. At this time, the corner block and the side block cooperate and abut against the inner wall of the feeding port opened in the furnace body, so that the corner block and the side block can seal the furnace body. When sealing is not needed and the furnace door is to be opened, it is only necessary to unlock the handle and rotate the handle in the opposite direction. At this time, the corner block and the side block will retract into the inside of the sealing device under the action of the spring, and the rotation of the rotating shaft will rotate the turntable, so that the corner block can return more smoothly. At this time, when the furnace door is opened again, the corner block and the side block will not contact and rub with the furnace body, and will not wear, thereby ensuring the insulation effect and sealing effect of the sealing device on the annealing furnace.

[0012] 2. The utility model uses symmetrically arranged temperature sensing probes and heating rods to more comprehensively monitor the temperature in the furnace when the equipment heats the material on the annealing rack. At the same time, the symmetrical heating rods can evenly heat the material on all sides when heating the material on the annealing rack, so that the crystal structures of various parts of the annealed material are similar, resulting in a better annealing effect. At the same time, through the cooperation of the temperature sensing probe and the heating rod, when the temperature in the corresponding area is different from the temperature in other areas, it is only necessary to increase the heat output of the heating rod to make the temperature in the furnace more uniform and the temperature control more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a left side view of the utility model;

[0015] Figure 3 This is a cross-sectional view of the furnace body of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the sealing device of the utility model;

[0017] Figure 5 It is a partial structural front view of the sealing device of the utility model.

[0018] In the figure: 1. bracket; 2. control box; 3. motor; 4. exhaust pipe; 5. furnace body; 51. temperature sensor; 52. heating rod; 53. exhaust port; 54. feeding port; 55. annealing rack; 6. furnace door; 7. sealing device; 701. sealing ring; 702. sealing frame; 703. sealing plate; 704. slide groove; 705. corner block; 706. side block; 707. connecting rod; 708. turntable; 709. limit groove; 710. rotating shaft; 711. telescopic rod; 712. spring; 713. fixing block; 714. sliding column; 715. connecting column; 8. handle; 9. locking pin. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figures 1 to 5As shown, a vacuum annealing furnace with precise temperature control in this embodiment includes a bracket 1, a control box 2 and a motor 3. The control box 2 and the motor 3 are both mounted on the upper surface of the bracket 1. The upper surface of the bracket 1 is also fixedly connected to a furnace body 5. An air extraction port 53 and a feeding port 54 are respectively provided at both ends of the furnace body 5. A furnace door 6 is hinged at the front end of the furnace body 5. A sealing device 7 is fixedly installed on the inner side of the furnace door 6. The sealing device 7 includes a sealing ring 701, a sealing frame 702 and a sealing plate 703. One end of the sealing frame 702 is fixedly connected to the inner side of the furnace door 6. The sealing ring 701 is clamped on the outer surface of the sealing frame 702. The sealing plate 703 A fixed block 713 and a connecting column 715 are fixedly connected to one side of 3, the other end of the connecting column 715 is fixedly connected to the inner side of the furnace door 6, a plurality of symmetrical telescopic rods 711 are fixedly connected to the outer side of the fixed block 713, the telescopic ends of the telescopic rods 711 are respectively connected to the sides of the corner block 705 and the side block 706, a rotating shaft 710 is rotatably installed at one end of the fixed block 713, a rotating disk 708 is fixedly sleeved on the outer surface of the rotating shaft 710, a plurality of symmetrical limiting grooves 709 are opened on one side of the rotating disk 708, a connecting rod 707 is slidably connected in the limiting groove 709, and the other end of the connecting rod 707 is hinged to the side of the corner block 705.

[0021] A control box 2 and a motor 3 are installed on the upper surface of the bracket 1. The control box 2 is responsible for receiving the temperature data of the temperature sensing probe 51 in the furnace body 5, controlling the heat output of the heating rod 52, and controlling the motor 3 to start and extract the air in the furnace body 5 to make the furnace body 5 a vacuum state. The furnace body 5 is cylindrical and is laterally fixed above the bracket 1. At the same time, the furnace body 5 is located on one side of the control box 2 and the motor 3. An exhaust port 53 is opened at one end of the furnace body 5. The exhaust port 53 and the motor 3 are connected through an exhaust pipe 4. A feeding port 53 is opened at the other end of the furnace body 5. The furnace door 6 is hinged at one end of the furnace door 6, and a sealing device 7 is fixed on the inner side of the furnace door 6. The sealing device 7 includes a sealing ring 701, a sealing frame 702 and a sealing plate 703. The sizes of the sealing frame 702 and the sealing plate 703 are the same as those of the feeding port 54. Therefore, after the furnace door 6 is closed, the sealing frame 702 and the sealing plate 703 of the sealing device 7 will be stuck in the feeding port 54, and the sealing ring 701 will block the small gap between the sealing frame 702 and the feeding port 54.

[0022] The interior of the sealing device 7 includes four corner blocks 705 and four side blocks 706. In the unsealed state, the corner blocks 705 and the side blocks 706 are located inside the sealing device 7, and they only contact the adjacent sealing frame 702 and the sealing plate 703. In this way, when the furnace door 6 is opened, the corner blocks 705 and the side blocks 706 will not contact the inner wall of the feed port 54 and be worn, so that the corner blocks 705 and the side blocks 706 can abut their sides against the feed port 54 more closely during operation. By setting a fixed block 713, a telescopic rod 711 and a spring 712 can be set between the fixed block 713 and the corner blocks 705 and the side blocks 706. When the sealing device 7 is working, the spring 712 is extended. When the furnace door 6 needs to be opened and the sealing device 7 is closed, the spring 712 can make the return of the corner blocks 705 and the side blocks 706 faster and smoother.

[0023] like Figure 4 and Figure 5 As shown, a plurality of symmetrical sliding grooves 704 are provided on one side where the sealing plate 703 is fixedly connected to the connecting column 715 , and a sliding column 714 is fixedly connected to one side of the corner block 705 and the side block 706 close to the sealing plate 703 , and the sliding column 714 is slidably connected in the sliding groove 704 .

[0024] A plurality of symmetrical slide grooves 704 are provided on one side of the sealing plate 703, and a slide column 714 is slidably connected in the slide groove 704, and the other end of the slide column 714 is fixed on the side of the corner block 705 and the side block 706. The slide groove 704 guides the corner block 705 and the side block 706 when they move.

[0025] like Figure 4 and Figure 5 As shown, a spring 712 is elastically connected between the fixing block 713 and the corner block 705 and the side block 706 , and the spring 712 is sleeved on the outer surface of the telescopic rod 711 .

[0026] The side of the fixed block 713 is elastically connected to one side of the corner block 705 and the side block 706 with a spring 712, and the spring 712 is sleeved on the outer surface of the telescopic rod 711. The spring 712 is responsible for pulling the corner block 705 and the side block 706 toward the fixed block 713 after the sealing device 7 stops working, so that the corner block 705 and the side block 706 can retract faster.

[0027] like Figure 2 As shown, one end of the rotating shaft 710 passes through the furnace door 6 and is fixedly connected to a handle 8. The handle 8 is provided with a locking hole, and a locking pin 9 is fixedly sleeved in the locking hole.

[0028] One end of the rotating shaft 710 is connected to a fixed block 713, and the other end passes through the furnace door 6 and is fixed with a handle 8. A locking hole is provided on the handle 8, and a locking pin 9 is fixedly sleeved in the locking hole. One end of the locking pin 9 is fixedly sleeved in the locking pin hole provided on the outer side of the furnace door 6, so that the sealing device 7 can be in a working state after the furnace door 6 is closed. When the furnace door 6 needs to be opened, the locking pin 9 is pulled out and the handle 8 is turned to control the rotating shaft 710 to rotate and drive the corner block 705 to retract. When the corner block 705 retracts, it no longer drives the side block 706 outward. At the same time, the side block 706 will be driven by the spring 712 to retract into the inside of the sealing device 7.

[0029] like Figure 3 As shown, a plurality of symmetrical temperature sensing probes 51 and heating rods 52 are fixedly connected inside the furnace body 5. An annealing rack 55 is also fixedly connected inside the furnace body 5. The top surface of the annealing rack 55 is located on the same horizontal line as the bottom surface of the feeding port 54. The exhaust port 53 is connected to the motor 3 through an exhaust pipe 4.

[0030] The temperature sensing probe 51 and the heating rod 52 are responsible for monitoring the temperature inside the furnace body 5. At the same time, the symmetrical heating rod 52 can make the temperature of each part inside the furnace body 5 uniform during heating. At the same time, when the temperature sensing probe 51 and the heating rod 52 are coordinated, when it is detected that the temperature of a certain part is lower than the temperature of other parts, the control box 2 can control the corresponding heating rod 52 to increase the power to make the temperature of each part in the furnace body 5 uniform.

[0031] like Figure 1 and Figure 4 As shown, the thickness of the corner block 705 is the same as that of the side block 706 , there is a gap between the sealing frame 702 and the sealing plate 703 , the width of the gap is the same as the thickness of the corner block 705 and the side block 706 , and the side surface of the fixing block 713 is the same as the sum of the number of the corner blocks 705 and the side blocks 706 .

[0032] The thickness of the corner block 705 and the side block 706 is the same as the width of the gap between the sealing frame 702 and the sealing plate 703, so that when the corner block 705 and the side block 706 are in working state, they are tightly matched with the sealing frame 702 and the sealing plate 703, thereby improving the sealing effect of the sealing device 7 on the furnace body 5.

[0033] The working principle of this utility model:

[0034] When it is necessary to anneal materials or other items that need annealing, first put the items on the annealing rack 55 in the furnace body 5, then close the furnace door 6, at this time, the sealing frame 702 and the sealing plate 703 of the sealing device 7 are clamped in the feeding port 54, then turn the handle 8 to make the handle 8 drive the rotating shaft 710 to rotate, and the rotation of the rotating shaft 710 will drive the connecting rod 707 to move toward the four corners of the sealing frame 702, and at the same time, the corner block 705 moves outward due to the movement of the connecting rod 707. At this time, the corner block 705 will drive the side block 706 to move outward together until the outer side surfaces of the corner block 705 and the side blocks 706 are in the same plane as the side surfaces of the sealing frame 702 and the sealing plate 703. At this time, the sealing device 7 seals the feeding port 54, and then the locking pin 9 is inserted into the locking hole of the handle 8 and extends into the locking pin hole provided on the outer side of the furnace door 6 to lock the working state of the sealing device 7.

[0035] After the sealing is completed, the motor 3 is turned on to allow the motor 3 to extract the air in the furnace body 5 so that the furnace body 5 is kept in a vacuum state, and then the annealing work can be started.

[0036] After annealing is completed, the locking pin 9 is pulled out and the handle 8 is turned in the opposite direction. At this time, the turntable 708 will rotate and drive the connecting rod 707 to move inward. At this time, the corner block 705 will retract under the drive of the connecting rod 707, and the side block 706 will retract under the action of the spring 712. At this time, the corner block 705 and the side block 706 are both retracted into the sealing device 7. When the furnace door 6 is opened, the corner block 705 and the side block 706 will not contact the inner wall of the feed port 54, and no wear caused by friction will occur, so that the sealing effect of the sealing device 7 on the furnace body 5 is guaranteed.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the utility model have been shown and described, it is understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum annealing furnace with precise temperature control, comprising a support (1), a control box (2) and a motor (3), wherein the control box (2) and the motor (3) are both mounted on the upper surface of the support (1), characterized in that: The upper surface of the bracket (1) is also fixedly connected to a furnace body (5), and the two ends of the furnace body (5) are respectively provided with an exhaust port (53) and a feeding port (54). The front end of the furnace body (5) is hinged with a furnace door (6), and a sealing device (7) is fixedly installed on the inner side of the furnace door (6). The sealing device (7) comprises a sealing ring (701), a sealing frame (702) and a sealing plate (703). One end of the sealing frame (702) is fixedly connected to the inner side of the furnace door (6), and the sealing ring (701) is clamped on the outer surface of the sealing frame (702). One side of the sealing plate (703) is fixedly connected to a fixing block (713) and a connecting column (715). The other end of the connecting column (715) is fixedly connected to the inner side of the furnace door (6); a plurality of symmetrical telescopic rods (711) are fixedly connected to the outer side of the fixed block (713); the telescopic ends of the telescopic rods (711) are respectively connected to the side surfaces of the corner block (705) and the side block (706); a rotating shaft (710) is rotatably mounted on one end of the fixed block (713); a rotating disk (708) is fixedly sleeved on the outer surface of the rotating shaft (710); a plurality of symmetrical limiting grooves (709) are provided on one side of the rotating disk (708); a connecting rod (707) is slidably connected in the limiting groove (709); and the other end of the connecting rod (707) is hinged to the side surface of the corner block (705).

2. A vacuum annealing furnace with precise temperature control according to claim 1, characterized in that: A plurality of symmetrical sliding grooves (704) are provided on one side where the sealing plate (703) is fixedly connected to the connecting column (715); a sliding column (714) is fixedly connected to one side of the corner block (705) and the side block (706) close to the sealing plate (703); and the sliding column (714) is slidably connected in the sliding groove (704).

3. A vacuum annealing furnace with precise temperature control according to claim 1, characterized in that: The fixing block (713) is elastically connected to the corner block (705) and the side block (706) respectively with a spring (712), and the spring (712) is sleeved on the outer surface of the telescopic rod (711).

4. The vacuum annealing furnace with precise temperature control according to claim 1, characterized in that: One end of the rotating shaft (710) passes through the furnace door (6) and is fixedly connected to a handle (8). A locking hole is provided on the handle (8), and a locking pin (9) is fixedly sleeved in the locking hole.

5. The vacuum annealing furnace with precise temperature control according to claim 1, characterized in that: A plurality of symmetrical temperature sensing probes (51) and heating rods (52) are fixedly connected inside the furnace body (5), and an annealing rack (55) is also fixedly connected inside the furnace body (5), wherein the top surface of the annealing rack (55) is located on the same horizontal line as the bottom surface of the feeding port (54), and the exhaust port (53) is connected to the motor (3) via an exhaust pipe (4).

6. The vacuum annealing furnace with precise temperature control according to claim 1, characterized in that: The corner block (705) and the side block (706) have the same thickness, a gap is provided between the sealing frame (702) and the sealing plate (703), the width of the gap is the same as the thickness of the corner block (705) and the side block (706), and the side surface of the fixing block (713) is the same as the sum of the number of the corner blocks (705) and the side blocks (706).

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