Vacuum tempering furnace

Abstract

The utility model discloses a vacuum tempering furnace, and relates to the technical field of internal heating type vacuum furnaces, the vacuum tempering furnace comprises a furnace body, a heating device and a cooling device; the heating device is arranged in the furnace body and is used for heating the interior of the furnace body; the cooling device comprises a cooling pipe and a first fan, the first fan is mounted in the furnace body, the cooling pipe is arranged between the first fan and the heating device, and a refrigerant is arranged in the cooling pipe; and when the first fan rotates, cold air on the peripheral side of the cooling pipe flows to one side of the heating device. According to the tempering furnace, the cooling pipe is arranged, the refrigerant is arranged in the cooling pipe, heat exchange is conducted between the cooling pipe and the refrigerant and the interior of the furnace body, flowing of airflow is accelerated in combination with the first draught fan, and then cooling in the tempering furnace is accelerated. The cooling speed can be controlled by adjusting the total area, exposed in the furnace body, of the cooling pipe and adjusting the flow speed or the types of the refrigerants. Compared with a vacuum tempering furnace in which stirring blades are only arranged in a furnace body, the vacuum tempering furnace provided by the utility model can be rapidly cooled, and the cooling speed is controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of internal heating vacuum furnaces, in particular to a vacuum tempering furnace. Background Art

[0002] Vacuum tempering furnaces are primarily suitable for processes such as vacuum quenching and bright quenching followed by tempering, as well as low-temperature annealing and aging. Internally heated vacuum tempering furnaces are used to perform heat treatment processes in a vacuum state after pre-evacuation, by filling with a protective atmosphere. Existing internally heated vacuum tempering furnaces are primarily resistance furnaces, which heat the furnace interior via resistance. When rapid cooling is required within the equipment, the furnace is typically cooled naturally or by accelerating the gas flow rate through a stirring system at the rear of the equipment. This cooling structure results in a slow cooling rate and is difficult to control during the tempering process. Utility Model Content

[0003] Aiming at the above problems, the utility model proposes a vacuum tempering furnace.

[0004] The technical solutions adopted by this utility model are as follows:

[0005] The present application provides a vacuum tempering furnace, comprising a furnace body, a heating device and a cooling device;

[0006] The heating device is arranged inside the furnace body and is used to heat the inside of the furnace body;

[0007] The cooling device includes a cooling pipe and a first fan:

[0008] The first fan is installed inside the furnace body, the cooling pipe is arranged between the first fan and the heating device, and the cooling pipe contains refrigerant;

[0009] When the first fan rotates, the cold air around the cooling pipe flows toward the heating device.

[0010] By providing cooling tubes with refrigerant within them, heat is exchanged between the cooling tubes and the refrigerant and the interior of the furnace body. Combined with a first fan, this accelerates airflow, thereby accelerating the cooling of the tempering furnace. Furthermore, the cooling rate can be controlled by adjusting the total area of ​​the cooling tubes exposed to the furnace body, the refrigerant flow rate, or the type of refrigerant. Compared to existing vacuum tempering furnaces that only incorporate stirring blades within the furnace body, the vacuum tempering furnace provided in this application achieves rapid cooling at a controllable rate.

[0011] Furthermore, the refrigerant is a cooling liquid, which can be cooling water in actual use.

[0012] Furthermore, the cooling device also includes a first motor, which is connected to the first fan, and the first motor is used to drive the first fan to rotate.

[0013] Furthermore, the cooling device further comprises a mounting frame and an air duct, wherein the mounting frame is fixed to the inner side wall of the furnace body and is used to mount a cooling pipe located inside the furnace body;

[0014] One end of the air duct is mounted on the inner wall of the furnace body, and the other end is mounted on the mounting frame, and is docked with the cooling pipe;

[0015] The first fan is located in the air duct.

[0016] Furthermore, the air ducts on both sides of the first fan are in the shape of a flared "trumpet".

[0017] Furthermore, the body of the first motor is located outside the furnace body, and the output shaft of the first motor passes through the body wall of the furnace body and is connected to the first fan inside the furnace body.

[0018] Furthermore, the cooling pipe comprises a plurality of stacked coils, each of which is plate-shaped and coiled in an "S" shape;

[0019] The coils in adjacent layers are staggered.

[0020] By arranging multiple layers of coils and staggering the coils of adjacent layers, the first fan can effectively break up the cold air flow around the cold pipe and make the cold air flow flow evenly in the inner cavity, further improving the cooling effect.

[0021] In actual use, each layer of coils may also be a structure of multiple straight pipes arranged at intervals.

[0022] Furthermore, the cooling pipe has a heat exchange portion and mounting portions provided at both ends of the heat exchange portion, and the cooling pipe passes through the mounting portions to enter or exit the furnace body;

[0023] The heat exchange part is located inside the furnace body.

[0024] Furthermore, it also includes a refrigerant device, which is used to cool the refrigerant, and the mounting parts at both ends of the heat exchange part are respectively connected to the inlet and outlet of the refrigerant device.

[0025] In actual use, multiple coils are connected to the refrigerant device respectively, or the two ends of the multiple coils are respectively gathered into two main pipes, the main pipe is the installation part, and the multiple coils are connected to the inlet and outlet of the refrigerant device through the main pipe.

[0026] The cooling efficiency is greatly improved by using refrigerant to assist cooling, and the refrigerant in the cooling pipe is not connected to the inside of the furnace, so that the cooling device can be isolated from the outside air.

[0027] Furthermore, the cooling pipe is a copper pipe, which is fixed to the mounting frame by bolts.

[0028] Furthermore, it also includes a second fan and a second motor connected to the second fan, the second fan is located inside the furnace body, and the axis of the second fan is perpendicular to the axis of the first fan.

[0029] In the prior art, only the stirring system at the rear end stirs the high-temperature areas in the middle and front of the tempering furnace, resulting in poor cooling effect, uneven tempering, and poor tempering quality. The axis of the second fan is perpendicular to the axis of the first fan, creating eddy currents within the furnace, accelerating cooling and achieving a more uniform temperature distribution within the furnace.

[0030] Furthermore, protective covers are provided on the outside of the first motor and the second motor, and the protective covers are used to prevent dust from affecting the operation of the motors.

[0031] Furthermore, the protective cover is a metal protective cover.

[0032] Furthermore, it also includes a furnace door structure, which includes a furnace door body, a telescopic element and a sealing member.

[0033] The output shaft of the telescopic element is connected to the furnace door body, the furnace door body is installed on the furnace body, and the sealing member is arranged on the furnace door body or the furnace body. When the furnace door body and the furnace body are buckled together, the sealing member is used for sealing and heat preservation.

[0034] Furthermore, the telescopic element may be a telescopic cylinder. In actual use, the telescopic element may also be a driving member such as an electric push rod that can pull the furnace door body and make the furnace door body tightly buckled with the furnace body.

[0035] Furthermore, a heat-insulating member is connected to the sealing member or the furnace door body to enhance the heat-insulating effect of the furnace door structure.

[0036] Furthermore, a vacuum device is included, and the vacuum device is used to evacuate the interior of the furnace body.

[0037] Furthermore, the vacuum device includes a mechanical pump, a Roots pump and a diffusion pump respectively installed on the furnace body.

[0038] Furthermore, the heating device includes a heater and a heat insulation plate, and the heat insulation plate is installed on the inner wall of the furnace body.

[0039] The heater is mounted on a side of the heat insulation board away from the inner wall of the furnace body.

[0040] Furthermore, the heater is a metal heating belt connected to a power source, the heat insulation board is fixed to the inner wall of the furnace body by fasteners, and the metal heating belt is fixed to the heat insulation board by fasteners.

[0041] During actual use, the first motor, the second motor, the cooling pipe and the vacuum device installed on the furnace body are all sealed and connected to the furnace body respectively.

[0042] The beneficial effects of the utility model are:

[0043] By setting a cold pipe, setting a refrigerant in the cold pipe, exchanging heat with the inside of the furnace body through the cold pipe and the refrigerant, and then combining with the first fan, the flow of airflow is accelerated, thereby accelerating the cooling of the tempering furnace. At the same time, the cooling speed can be controlled by adjusting the total area of ​​the cold pipe exposed to the inside of the furnace body, adjusting the flow rate of the refrigerant or the type of refrigerant. Compared with the existing vacuum tempering furnace that only has stirring blades in the furnace body, the vacuum tempering furnace provided by the present application can cool down quickly and the cooling speed is controllable. (2) By setting multiple layers of coils and staggering the coils of adjacent layers, the first fan can effectively break up the cold airflow around the cold pipe and make the cold airflow circulate evenly in the inner cavity, further improving the cooling effect.

[0044] (3) By setting up a second fan and making the axis of the second fan perpendicular to the axis of the first fan, a vortex is formed in the furnace body, which accelerates the cooling and makes the temperature distribution in the furnace body more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic structural diagram of a vacuum tempering furnace according to an embodiment of the present invention (a cross-sectional structure in the main viewing direction);

[0046] Figure 2 yes Figure 1 Schematic diagram of the locally enlarged structure of A in the middle.

[0047] The reference numerals in the figures are:

[0048] 10. Furnace body; 20. Heating device; 210. Heater; 220. Heat insulation board; 30. Cooling device; 310. Cold pipe; 311. Heat exchange unit; 320. First fan; 330. First motor; 340. Mounting frame; 350. Air duct; 560. Second fan; 370. Second motor; 380. Protective cover; 390. Motor mounting plate; 40. Furnace door structure; 410. Furnace door body; 420. Telescopic element; 430. Sealing element; 50. Vacuum device. DETAILED DESCRIPTION

[0049] The present invention will be described in detail below with reference to the accompanying drawings.

[0050] like Figure 1 and Figure 2 As shown, the present application provides a vacuum tempering furnace, comprising a furnace body 10, a heating device 20 and a cooling device 30;

[0051] The heating device 20 is disposed inside the furnace body 10 and is used to heat the interior of the furnace body 10;

[0052] The cooling device 30 includes a cooling pipe 310 and a first fan 320:

[0053] The first fan 320 is installed inside the furnace body 10, and the cold pipe 310 is provided between the first fan 320 and the heating device 20, and the cold pipe 310 contains a refrigerant;

[0054] When the first fan 320 rotates, the cold air around the cooling pipe 310 flows toward the heating device 20 .

[0055] By installing a cooling tube 310 and placing a refrigerant within the cooling tube 310, heat is exchanged between the cooling tube 310 and the refrigerant and the interior of the furnace body 10. Combined with the first fan 320, this accelerates the flow of air, thereby accelerating the cooling of the tempering furnace. Furthermore, the cooling rate can be controlled by adjusting the total area of ​​the cooling tube 310 exposed to the interior of the furnace body 10, the refrigerant flow rate, or the type of refrigerant. Compared to existing vacuum tempering furnaces that only have stirring blades within the furnace body 10, the vacuum tempering furnace provided in this application can achieve rapid cooling at a controllable rate.

[0056] In this embodiment, the refrigerant is a cooling liquid, which can be cooling water in actual use.

[0057] In this embodiment, the cooling device 30 further includes a first motor 330 . The first motor 330 is connected to the first fan 320 . The first motor 330 is used to drive the first fan 320 to rotate.

[0058] In this embodiment, the cooling device 30 further includes a mounting frame 340 and an air duct 350 . The mounting frame 340 is fixed to the inner wall of the furnace body 10 . The mounting frame 340 is used to mount the cooling pipe 310 located inside the furnace body 10 .

[0059] One end of the air duct 350 is mounted on the inner wall of the furnace body 10, and the other end is mounted on the mounting frame 340, and is connected to the cooling pipe 310;

[0060] The first fan 320 is located in the air duct 350 .

[0061] In this embodiment, the air ducts 350 located on both sides of the first fan 320 are in the shape of a flared trumpet.

[0062] In this embodiment, the body of the first motor 330 is located outside the furnace body 10 , and the output shaft of the first motor 330 passes through the wall of the furnace body 10 and is connected to the first fan 320 inside the furnace body 10 .

[0063] In this embodiment, the cooling pipe 310 includes a plurality of stacked coils, each of which has a plate-like structure and is coiled in an "S" shape;

[0064] The coils in adjacent layers are staggered.

[0065] By arranging multiple layers of coils and staggering the coils of adjacent layers, the first fan 320 can effectively break up the cold air flow around the cold pipe 310 and make the cold air flow flow evenly in the inner cavity, further improving the cooling effect.

[0066] In actual use, each layer of coils may also be a structure of multiple straight pipes arranged at intervals.

[0067] In this embodiment, cooling tube 310 comprises six coils, each wound in an S-shaped pattern to form a six-layer structure. The coils in two adjacent layers are staggered. The S-shaped coils have multiple straight sections and bends connected in sequence. The straight sections of each layer of coils face the gaps between the straight sections of the adjacent layers. Each layer of coils has five to seven S-shaped bends.

[0068] In other embodiments, the cold pipe 310 may also include 5 or 7 coils.

[0069] In this embodiment, the cold pipe 310 has a heat exchange portion 311 and mounting portions provided at both ends of the heat exchange portion 311 , and the cold pipe 310 passes through or out of the furnace body 10 through the mounting portions;

[0070] The heat exchange portion 311 is located inside the furnace body 10 .

[0071] In this embodiment, a refrigerant device is further included. The refrigerant device is used to cool the refrigerant. The mounting portions at both ends of the heat exchange portion 311 are respectively connected to the inlet and outlet of the refrigerant device.

[0072] In actual use, multiple coils are connected to the refrigerant device respectively, or the two ends of the multiple coils are respectively gathered into two main pipes, which are installation parts, and the multiple coils are connected to the inlet and outlet of the refrigerant device through the main pipes.

[0073] In this embodiment, a second fan 560 and a second motor 370 connected to the second fan 560 are further included. The second fan 560 is located inside the furnace body 10 , and the axis of the second fan 560 is perpendicular to the axis of the first fan 320 .

[0074] In the prior art, only the stirring system at the rear end stirs the high-temperature areas in the middle and front parts of the tempering furnace, resulting in poor cooling effect, uneven tempering, and poor tempering quality. The axis of the second fan 560 is perpendicular to the axis of the first fan 320, creating eddy currents within the furnace body 10, accelerating cooling and achieving a more uniform temperature distribution within the furnace body 10.

[0075] In this embodiment, a furnace door structure 40 is further included. The furnace door structure 40 includes a furnace door body 410, a telescopic element 420, and a sealing member 430.

[0076] The output shaft of the telescopic element 420 is connected to the furnace door body 410, and the furnace door body 410 is installed on the furnace body 10. The seal 430 is set on the furnace door body 410 or the furnace body 10, but when the furnace door body 410 is buckled with the furnace body 10, the seal 430 is used for sealing and heat preservation.

[0077] In this embodiment, the telescopic element 420 may be a telescopic cylinder.

[0078] When the furnace door 410 is closed, the telescopic cylinder moves toward one side of the interior of the furnace body 10 , further pressing the furnace door 410 onto the furnace body 10 , thereby enhancing the sealing reliability of the furnace door 410 .

[0079] In this embodiment, a heat-insulating member is further connected to the sealing member 430 or the furnace door body 410 to enhance the heat-insulating effect of the furnace door structure 40 .

[0080] In this embodiment, a vacuum device 50 is further included, and the vacuum device 50 is used to evacuate the interior of the furnace body 10 .

[0081] In this embodiment, the vacuum device 50 includes a mechanical pump, a Roots pump, and a diffusion pump, which are respectively installed on the furnace body 10 .

[0082] In this embodiment, the heating device 20 includes a heater 210 and a heat insulating plate 220. The heat insulating plate 220 is mounted on the inner wall of the furnace body 10.

[0083] The heater 210 is installed on a side of the heat insulation board 220 away from the inner wall of the furnace body 10 .

[0084] In this embodiment, the heater 210 is a metal heating belt connected to a power source. The heat insulating plate 220 is fixed to the inner wall of the furnace body 10 by fasteners, and the metal heating belt is fixed to the heat insulating plate 220 by fasteners.

[0085] During actual use, the first motor 330 , the second motor 370 , the cooling pipe 310 and the vacuum device 50 installed on the furnace body 10 are all sealedly connected to the furnace body 10 .

[0086] In this embodiment, a protective cover 380 is provided outside the first motor 330 and the second motor 370 (the protective cover outside the second motor 370 is not shown), and the protective cover is used to prevent dust from affecting the operation of the motors.

[0087] In this embodiment, the protective cover is a metal protective cover.

[0088] In this embodiment, a motor mounting plate 390 is further included, and the first motor 330 is mounted on the furnace body 10 through the motor mounting plate 390 .

[0089] The above description is only a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformation made by using the contents of the description and drawings of the present invention, directly or indirectly applied in other related technical fields, is also included in the scope of protection of the present invention.

Claims

1. A vacuum tempering furnace, characterized in that: It includes a furnace body, a heating device and a cooling device; The heating device is arranged inside the furnace body and is used to heat the inside of the furnace body; The cooling device includes a cooling pipe and a first fan: The first fan is installed inside the furnace body, the cooling pipe is arranged between the first fan and the heating device, and the cooling pipe contains refrigerant; When the first fan rotates, the cold air around the cooling pipe flows toward the heating device.

2. A vacuum tempering furnace according to claim 1, characterized in that: The cooling device further includes a first motor connected to the first fan, and the first motor is used to drive the first fan to rotate.

3. A vacuum tempering furnace according to claim 2, characterized in that: The cooling device further includes a mounting frame and an air duct, wherein the mounting frame is fixed to the inner side wall of the furnace body and is used to mount a cooling pipe located inside the furnace body; One end of the air duct is mounted on the inner wall of the furnace body, and the other end is mounted on the mounting frame, and is docked with the cooling pipe; The first fan is located in the air duct.

4. A vacuum tempering furnace according to claim 2, characterized in that: The body of the first motor is located outside the furnace body, and the output shaft of the first motor passes through the body wall of the furnace body and is connected to the first fan inside the furnace body.

5. The vacuum tempering furnace according to claim 1, characterized in that: The cooling pipe comprises a plurality of stacked coils, each of which is plate-shaped and coiled in an S-shape. The coils in adjacent layers are staggered.

6. The vacuum tempering furnace according to claim 1, characterized in that: The cooling pipe has a heat exchange portion and mounting portions provided at both ends of the heat exchange portion, and the cooling pipe passes through the mounting portions to enter or exit the furnace body; The heat exchange part is located inside the furnace body.

7. The vacuum tempering furnace according to claim 1, characterized in that: It also includes a second fan and a second motor connected to the second fan, the second fan is located inside the furnace body, and the axis of the second fan is perpendicular to the axis of the first fan.

8. The vacuum tempering furnace according to claim 1, characterized in that: It also includes a furnace door structure, which includes a furnace door body, a telescopic element and a sealing member. The output shaft of the telescopic element is connected to the furnace door body, the furnace door body is installed on the furnace body, and the sealing member is arranged on the furnace door body or the furnace body. When the furnace door body and the furnace body are buckled together, the sealing member is used for sealing and heat preservation.

9. The vacuum tempering furnace according to claim 1, characterized in that: It also includes a vacuum device, which is used to evacuate the interior of the furnace body.

10. The vacuum tempering furnace according to claim 1, characterized in that: The heating device includes a heater and a heat insulation plate, and the heat insulation plate is installed on the inner wall of the furnace body. The heater is mounted on a side of the heat insulation board away from the inner wall of the furnace body.

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