Inert gas protection heating furnace

Abstract

The utility model belongs to the technical field of heating furnaces, and particularly relates to an inert gas protection heating furnace which comprises a shell, a screw rod is rotatably connected to the interior of the bottom end of the shell through a bearing, and a motor is fixed to one side wall of the shell. Through the arrangement of the electric heating pipe, the temperature sensor, the top plate, the air extracting pump, the air extracting pipe, the air outlet one-way valve, the connecting pipe, the nitrogen storage bottle, the air feeding pipe, the electromagnetic valve, the air inlet pipe, the digital display pressure gauge and the controller, the heating temperature in the shell can be controlled, and when a metal product is heated, air in the shell can be extracted firstly, and then the air in the shell can be heated. Nitrogen is conveyed into the shell, metal products are protected, opening or closing of the through opening can be conveniently controlled by arranging the lifting door assembly, and the storage plate can be conveniently and rapidly controlled to move out of or retract back into the shell by arranging the screw, the motor and the connecting plate. Therefore, the metal product can be conveniently fed into the shell or pushed out of the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, in particular to an inert gas protection heating furnace. Background Art

[0002] During the manufacturing process, some metal products need to be heat treated to change the properties of the metal. At present, a heating furnace is generally used to heat metal products. During the heating process, inert gas is usually introduced for protection to ensure that the metal products are not oxidized. The current heating furnaces are generally open, so when the metal products are heated, there will still be oxygen, which makes them easily oxidized. In addition, it is not convenient to place the metal products in the heating furnace during use, nor is it convenient to push the metal products out of the heating furnace after heating. Therefore, we propose an inert gas protection heating furnace to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies of the prior art, the utility model provides an inert gas protection heating furnace, which solves the problems raised in the above background technology.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] An inert gas protection heating furnace comprises a shell, wherein a screw is rotatably connected to the bottom end of the shell through a bearing, a motor is fixed to one side wall of the shell, an output shaft of the motor is fixedly connected to one end of the screw, a connecting plate is threadedly connected to the surface of the screw, the connecting plate fits and slides in the shell, a storage plate for placing workpieces is fixed on the top of the connecting plate, a through hole is opened on one side wall of the shell for the storage plate to enter and exit, a lifting door assembly is provided at the through hole of the shell, electric heating tubes are equidistantly installed inside the shell, a temperature sensor is installed inside the shell, a top plate is fixed to the top of the shell, an exhaust pump is fixed to the top of the top plate, an exhaust pipe is fixed to the exhaust end of the exhaust pump, and the An air outlet one-way valve is installed at one end of the air extraction pipe, and a connecting pipe is installed at one end of the air outlet one-way valve, one end of the connecting pipe passes through the top plate and is connected to the shell, a support block is fixed on the surface of the shell, a nitrogen storage bottle is fixed on the top of the support block, an air supply pipe is installed and connected to the top of the nitrogen storage bottle, a solenoid valve is installed at one end of the air supply pipe, an air intake pipe is installed at one end of the solenoid valve, one end of the air intake pipe passes through the top plate and is connected to the shell, a digital pressure gauge is fixed on the top of the top plate, and the detection end of the digital pressure gauge extends into the shell, and a controller is installed on the surface of the shell, and the controller is electrically connected to the motor, the lifting door assembly, the electric heating tube, the temperature sensor, the air extraction pump, the solenoid valve and the digital pressure gauge.

[0008] Furthermore, the lifting door assembly includes a fixing plate fixed to a side wall of the shell, an electric push rod is fixed to the bottom of the fixing plate, a mounting plate is fixed to the ejection end of the electric push rod, a sealing plate is fixed to a side wall of the mounting plate, the sealing plate is fitted and slid on the surface of the shell, and the electric push rod is electrically connected to the controller.

[0009] Furthermore, two telescopic sleeves are symmetrically fixed to the bottom of the fixing plate, and the bottom ends of the telescopic sleeves are fixedly connected to the top of the mounting plate.

[0010] Furthermore, support legs are fixed to the four corners of the bottom of the shell, a support plate is fixed to one side wall of the shell at the opening, the top of the support plate is flush with the bottom of the storage plate, and two support columns are symmetrically fixed to the bottom of one end of the support plate.

[0011] Furthermore, anti-skid rubber pads are fixed to the bottoms of the support legs and support columns.

[0012] Furthermore, two guide rods are symmetrically fixed inside the shell, the connecting plate is slidably connected to the surfaces of the two guide rods, a threaded hole adapted to the screw rod is opened in the middle of the connecting plate, and guide holes adapted to the guide rods are opened at both ends of the connecting plate.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides an inert gas protection heating furnace with the following features:

[0015] Beneficial effects:

[0016] The utility model can control the heating temperature inside the shell by arranging an electric heating tube, a temperature sensor, a top plate, an air pump, an air extraction pipe, an air outlet non-return valve, a connecting pipe, a supporting block, a nitrogen storage bottle, an air supply pipe, an electromagnetic valve, an air inlet pipe, a digital pressure gauge and a controller. When heating a metal product, the air inside the shell can be evacuated first, and then nitrogen can be transported into the shell to protect the metal product. By arranging a lifting door assembly, the opening or closing of the port can be controlled more conveniently. By arranging a screw rod, a motor and a connecting plate, the storage plate can be conveniently and quickly controlled to be moved out of or retracted from the shell, so that the metal product can be conveniently sent into or pushed out of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall first-view three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall second viewing angle stereoscopic structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the overall top view structure of the utility model;

[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the cross-section structure at the middle edge AA;

[0021] Figure 5 This is a schematic diagram of the guide rod structure of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the connecting plate of the utility model;

[0023] Figure 7 This is the principle diagram of the utility model system.

[0024] In the figure: 1. shell; 2. screw; 3. motor; 4. connecting plate; 5. storage plate; 6. port; 7. lifting door assembly; 701. fixing plate; 702. electric push rod; 703. mounting plate; 704. sealing plate; 705. telescopic sleeve; 8. electric heating tube; 9. temperature sensor; 10. top plate; 11. vacuum pump; 12. vacuum pipe; 13. exhaust check valve; 14. connecting pipe; 15. support block; 16. nitrogen storage bottle; 17. air supply pipe; 18. solenoid valve; 19. air inlet pipe; 20. digital pressure gauge; 21. controller; 22. support leg; 23. support plate; 24. support column; 25. guide rod. DETAILED DESCRIPTION

[0025] 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.

[0026] Example

[0027] like Figure 1-7As shown, an inert gas protection heating furnace proposed by an embodiment of the utility model comprises a shell 1, a screw 2 is rotatably connected to the bottom end of the shell 1 through a bearing, a motor 3 is fixed to one side wall of the shell 1, an output shaft of the motor 3 is fixedly connected to one end of the screw 2, a connecting plate 4 is threadedly connected to the surface of the screw 2, the connecting plate 4 fits and slides in the shell 1, a storage plate 5 for placing workpieces is fixed on the top of the connecting plate 4, a through hole 6 for the storage plate 5 to enter and exit is opened on one side wall of the shell 1, a lifting door assembly 7 is arranged at the through hole 6 of the shell 1, electric heating tubes 8 are equidistantly installed inside the shell 1, a temperature sensor 9 is installed inside the shell 1, a top plate 10 is fixed to the top of the shell 1, an exhaust pump 11 is fixed to the top of the top plate 10, an exhaust pipe 12 is fixed to the exhaust end of the exhaust pump 11, and the exhaust pipe 12 An outlet one-way valve 13 is installed at one end, and a connecting pipe 14 is installed at one end of the outlet one-way valve 13. One end of the connecting pipe 14 passes through the top plate 10 and is connected to the shell 1. A support block 15 is fixed on the surface of the shell 1, and a nitrogen storage bottle 16 is fixed on the top of the support block 15. An air supply pipe 17 is installed and connected to the top of the nitrogen storage bottle 16. A solenoid valve 18 is installed at one end of the air supply pipe 17. An air intake pipe 19 is installed at one end of the solenoid valve 18. One end of the air intake pipe 19 passes through the top plate 10 and is connected to the shell 1. A digital pressure gauge 20 is fixed on the top of the top plate 10, and the detection end of the digital pressure gauge 20 extends into the shell 1. A controller 21 is installed on the surface of the shell 1, and the controller 21 is electrically connected to the motor 3, the lifting door assembly 7, the electric heating tube 8, the temperature sensor 9, the vacuum pump 11, the solenoid valve 18 and the digital pressure gauge 20.

[0028] When in use, the controller 21 is used to control the lifting door assembly 7 to start and open the port 6, and then the controller 21 is used to control the motor 3 to start, the motor 3 can drive the screw 2 to rotate, the screw 2 can drive the connecting plate 4 to move to the right, and the connecting plate 4 can drive the storage plate 5 to move to the right, so that the storage plate 5 can be pushed out of the shell 1, and then the staff puts the metal product on the storage plate 5, and then starts the motor 3, the motor 3 drives the screw 2 to rotate in the opposite direction, so that the storage plate 5 can be retracted into the shell 1, and then the controller 21 is used to control the vacuum pump 11 to start, and the vacuum pump 11 can extract the air in the shell 1 through the vacuum pipe 12, the exhaust check valve 13 and the connecting pipe 14. When the digital pressure gauge 20 reaches a certain value, The controller 21 will control the vacuum pump 11 to stop working, and then control the solenoid valve 18 to open through the controller 21, so that the nitrogen in the nitrogen storage bottle 16 can be transported to the shell 1, which can prevent oxidation, and then turn on the electric heating tube 8 to heat the metal product. The temperature in the shell 1 can be monitored by the set temperature sensor 9. When the temperature in the shell 1 exceeds the set value or is lower than the set value, the temperature sensor 9 will send a signal to the controller 21, and the controller 21 will control the electric heating tube 8 to stop or start, so that the heating temperature in the shell 1 can be within the set range, so the heating effect is better. After the metal product is heated, the storage plate 5 can be pushed out of the shell 1.

[0029] like Figure 1 , Figure 4 and Figure 7 As shown, in some embodiments, the lifting door assembly 7 includes a fixed plate 701 fixed to a side wall of the shell 1, an electric push rod 702 is fixed to the bottom of the fixed plate 701, and a mounting plate 703 is fixed to the ejection end of the electric push rod 702. Two telescopic sleeves 705 are symmetrically fixed to the bottom of the fixed plate 701, and the bottom ends of the telescopic sleeves 705 are fixedly connected to the top of the mounting plate 703 so that the mounting plate 703 can move more stably in the vertical direction. A sealing plate 704 is fixed to one side wall of the mounting plate 703, and the sealing plate 704 slides on the surface of the shell 1. The electric push rod 702 is electrically connected to the controller 21. When the opening 6 needs to be opened, the ejection end of the electric push rod 702 can be controlled to retract by the controller 21, and the ejection end of the electric push rod 702 can drive the mounting plate 703 to move upward, and the mounting plate 703 can drive the sealing plate 704 to move upward, so that the opening 6 can be opened.

[0030] like Figure 1 and Figure 4As shown, in some embodiments, support legs 22 are fixed to the four corners of the bottom of the shell 1 to support the shell 1. A support plate 23 is fixed to one side wall of the shell 1 located at the through opening 6. The top of the support plate 23 is flush with the bottom of the storage board 5. When the storage board 5 is pushed out of the shell 1, the support plate 23 can support and support the storage board 5, so that the movement of the storage board 5 can be more stable. Two support columns 24 are symmetrically fixed to the bottom of one end of the support plate 23 to play a supporting role. The bottom of the support legs 22 and the support columns 24 are fixed with anti-slip rubber pads, which can play a good anti-slip role, so that the overall placement can be more stable.

[0031] like Figure 5 and Figure 6 As shown, in some embodiments, two guide rods 25 are symmetrically fixed inside the shell 1, and the connecting plate 4 is slidably connected to the surfaces of the two guide rods 25. A threaded hole adapted to the screw rod 2 is opened in the middle of the connecting plate 4, and guide holes adapted to the guide rod 25 are opened at both ends of the connecting plate 4. When the screw rod 2 rotates, the connecting plate 4 can move more stably in the shell 1.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An inert gas protection heating furnace, comprising a shell (1), characterized in that: A screw rod (2) is rotatably connected to the bottom of the housing (1) via a bearing, a motor (3) is fixed to one side wall of the housing (1), an output shaft of the motor (3) is fixedly connected to one end of the screw rod (2), a connecting plate (4) is threadedly connected to the surface of the screw rod (2), the connecting plate (4) fits and slides in the housing (1), a placement plate (5) for placing workpieces is fixed to the top of the connection plate (4), and a through hole (5) for the placement plate (5) to enter and exit is opened on one side wall of the housing (1). 6), the shell (1) is provided with a lifting door assembly (7) at the opening (6), the interior of the shell (1) is equidistantly provided with electric heating tubes (8), the interior of the shell (1) is provided with a temperature sensor (9), the top of the shell (1) is fixed with a top plate (10), the top of the top plate (10) is fixed with an air pump (11), the air pump end of the air pump (11) is fixed with an air pump pipe (12), one end of the air pump pipe (12) is provided with an air outlet non-return valve (13), the air outlet A connecting pipe (14) is installed at one end of the one-way valve (13), one end of the connecting pipe (14) passes through the top plate (10) and is connected to the shell (1), a support block (15) is fixed on the surface of the shell (1), a nitrogen storage bottle (16) is fixed on the top of the support block (15), an air supply pipe (17) is installed at the top of the nitrogen storage bottle (16), one end of the air supply pipe (17) is installed, and one end of the solenoid valve (18) is installed with an air intake pipe (19). One end of the air inlet pipe (19) passes through the top plate (10) and is in communication with the shell (1); a digital pressure gauge (20) is fixed on the top of the top plate (10); a detection end of the digital pressure gauge (20) extends into the shell (1); a controller (21) is installed on the surface of the shell (1); the controller (21) is electrically connected to the motor (3), the lifting door assembly (7), the electric heating tube (8), the temperature sensor (9), the air pump (11), the solenoid valve (18) and the digital pressure gauge (20).

2. The inert gas protection heating furnace according to claim 1, characterized in that: The lifting door assembly (7) comprises a fixing plate (701) fixed to a side wall of the shell (1); an electric push rod (702) is fixed to the bottom of the fixing plate (701); a mounting plate (703) is fixed to the ejection end of the electric push rod (702); a sealing plate (704) is fixed to a side wall of the mounting plate (703); the sealing plate (704) is fitted and slid on the surface of the shell (1); and the electric push rod (702) is electrically connected to the controller (21).

3. The inert gas protection heating furnace according to claim 2, characterized in that: Two telescopic sleeves (705) are symmetrically fixed to the bottom of the fixing plate (701), and the bottom ends of the telescopic sleeves (705) are fixedly connected to the top of the mounting plate (703).

4. The inert gas protection heating furnace according to claim 1, characterized in that: Support legs (22) are fixed at the four corners of the bottom of the shell (1), a support plate (23) is fixed to a side wall of the shell (1) located at the opening (6), the top of the support plate (23) is flush with the bottom of the storage plate (5), and two support columns (24) are symmetrically fixed to the bottom of one end of the support plate (23).

5. The inert gas protection heating furnace according to claim 4, characterized in that: Anti-skid rubber pads are fixed to the bottoms of the support legs (22) and the support columns (24).

6. The inert gas protection heating furnace according to claim 1, characterized in that: Two guide rods (25) are symmetrically fixed inside the shell (1), and the connecting plate (4) is slidably connected to the surfaces of the two guide rods (25). A threaded hole adapted to the screw rod (2) is provided in the middle of the connecting plate (4), and guide holes adapted to the guide rods (25) are provided at both ends of the connecting plate (4).

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