Purging device of Locker annealing furnace

Abstract

The utility model relates to the technical field of metal product annealing, in particular to a purging device of a Lockg annealing furnace, and aims to solve the problem that a purging rod of an existing purging device is easy to fall off during use to cause safety accidents, the purging device comprises a tool plate, the tool plate is mounted on a furnace body, a through hole is formed in the furnace body, and the through hole is communicated with the purging rod. A through hole corresponding to the through hole of the furnace body is formed in the tool plate; a flow guide valve is arranged on the side, away from the furnace body, of the tool plate, a sealing piece is arranged at the position, located at the through hole, of the tool plate, the end, away from the tool plate, of the sealing piece is connected with the flow guide valve, the end, away from the flow guide valve, of the sealing piece is communicated with the furnace body, and therefore the flow guide valve is communicated with the furnace body. And the diverter valve is communicated with a nitrogen supply device, a vacuumizing device and a nitrogen collection device. The blowing device has the effect of improving the use safety of the blowing device.

Description

Technical Field

[0001] The present application relates to the technical field of metal product annealing, and in particular to a Junker annealing furnace purge device. Background Art

[0002] The annealing process of metal products includes heating, heat preservation and cooling. The existing technology usually uses Junker annealing furnace to anneal metal products to eliminate stress in metal products and improve product quality. When annealing, it is usually necessary to fill the Junker annealing furnace with inert gas such as nitrogen for protection, and use a purge device to blow nitrogen to the product in the Junker annealing furnace for purge to remove oxidized materials and oil stains on the product.

[0003] The existing purge device is usually a purge rod that is movably arranged on the Junker annealing furnace; the purge rod is hollow inside and has a purge hole, and the purge rod is connected to the nitrogen supply device through a bellows. After the operator places the products in the Junker annealing furnace, the purge rod is inserted into the Junker annealing furnace for nitrogen protection and purge; after the annealing is completed, the purge rod is withdrawn first, and then the annealed products are taken out.

[0004] However, the existing purge rod needs to be disassembled and transported every day. The purge rod is heavy and dangerous to transport. When the purge rod moves, it drives the bellows connected to it to expand and contract. The connecting bolts between the purge rod and the bellows are relatively short and easy to fall off, causing the purge rod to fall off and cause safety accidents. Therefore, there is room for improvement. Utility Model Content

[0005] In order to improve the safety of the use of the purge device, the present application provides a Junkers annealing furnace purge device.

[0006] The Junker annealing furnace purge device provided in this application adopts the following technical solution:

[0007] A purge device for a Junkers annealing furnace comprises a tooling plate, wherein the tooling plate is mounted on a furnace body, a through hole is provided on the furnace body, and a through hole is provided on the tooling plate corresponding to the through hole of the furnace body; a diversion valve is provided on the side of the tooling plate away from the furnace body, a sealing member is provided on the tooling plate at the through hole, an end of the sealing member away from the tooling plate is connected to the diversion valve, and an end of the sealing member away from the diversion valve is communicated with the furnace body, thereby connecting the diversion valve to the furnace body; a nitrogen supply device, a vacuum pumping device and a nitrogen collecting device are connected to the diversion valve.

[0008] By adopting the above technical solution, the operator installs the guide valve on the tooling plate through the seal, and then installs the tooling plate on the furnace body. The guide valve and the seal are connected to the inside of the furnace body. After the operator stacks the workpieces in the furnace body, the furnace body is closed, the nitrogen supply device and the nitrogen collection device are turned off, and the vacuum device is started to extract the air inside the furnace body through the guide valve and then closed. The nitrogen supply device is started to fill the guide valve with nitrogen, and the nitrogen enters the furnace body through the guide valve to complete the gas replacement. When the furnace reaches the design temperature, the nitrogen supply device is started to fill the guide valve with high-pressure nitrogen. The high-pressure nitrogen is guided by the guide valve to form an airflow to blow out the guide valve. The airflow is blown toward the workpiece in the furnace body to purge the workpiece. When the air pressure in the furnace is higher than the safety value after purging, the nitrogen supply device is turned off and the nitrogen collection device is started. The nitrogen collection device extracts the excess nitrogen in the furnace body, and the pressure in the furnace body is maintained in accordance with the design requirements during the entire annealing process. Reduce the impact of the pressure in the furnace on the annealing effect of the workpiece, and avoid safety accidents caused by excessive furnace pressure. The purge rod of the prior art is replaced by a guide valve to achieve external furnace purge, avoid safety accidents caused by the purge rod falling off, and improve the safety of the purge device.

[0009] Optionally, the diversion valve includes a valve body and a diversion bowl, the valve body is mounted on the tooling plate through a seal; a cavity is arranged inside the valve body, the cavity passes through the side wall of the valve body close to the tooling plate, a first air inlet hole, a first air outlet hole and a second air outlet hole are opened on the top wall of the valve body, the first air inlet hole, the first air outlet hole and the second air outlet hole are respectively connected to the cavity, the nitrogen supply device is connected to the first air inlet hole through an air pipe, and the nitrogen collection device is connected to the first air outlet hole through an air pipe, The vacuum device is connected to the second air outlet through an air pipe; the guide bowl is arranged in the cavity, the side wall of the guide bowl away from the furnace body is in contact with the side wall of the cavity, the outer peripheral wall of the guide bowl close to the furnace body is in contact with the inner peripheral wall of the cavity, and there is a gap between the outer peripheral wall of the guide bowl and the inner wall of the cavity; the sealing member restricts the guide bowl in the cavity; a plurality of guide holes are opened on the peripheral wall of the guide bowl, and the plurality of guide holes are evenly arranged along the circumference of the guide bowl, and a plurality of the guide holes are connected to the cavity.

[0010] Optionally, the peripheral wall of the guide bowl is inclined outward from the valve body to the furnace body, the length direction of the guide hole is at an angle to the vertical direction, and one end of each guide hole close to the furnace body is arranged toward the center of the through hole on the furnace body.

[0011] Optionally, the length direction of each of the guide holes is inclined clockwise along the circumference of the guide bowl.

[0012] By adopting the above technical solution, when it is necessary to purge the workpiece in the furnace body, the nitrogen supply device injects high-pressure nitrogen into the cavity, and the high-pressure nitrogen fills the gap between the guide bowl and the cavity. High-pressure nitrogen is input from the end of the guide hole close to the outside of the guide bowl, and under the guidance of the guide hole, it is blown out from the end of the guide hole close to the inside of the guide bowl along the extension direction of the guide hole. The high-pressure airflow blown out by multiple guide holes converges clockwise along the circumference of the guide bowl toward the direction close to the furnace body, and forms a high-pressure airflow that is close to the furnace body and rotates with the axis of the guide bowl as the axis to enter the furnace body to purge the workpiece in the furnace body. The direction of the airflow is guided by the guide hole, so that the guide valve can purge the workpiece outside the furnace with a high-pressure nitrogen airflow; compared with the purge rod of the prior art, the setting of the guide valve avoids safety accidents in the furnace caused by the purge rod falling off, and improves the safety of the purge device.

[0013] Optionally, the guide bowl is slidably matched with the valve body and the sealing member, a control member is installed on the valve body, a control hole is opened on the side wall of the valve body away from the furnace body, and the movable end of the control member passes through the control hole and is connected with the guide bowl to drive the guide bowl to rotate along its circumferential direction; a first stopper, a second stopper and a third stopper are installed on the guide bowl, and the first stopper, the second stopper and the third stopper are arranged at intervals along the circumference of the guide bowl; the first stopper, the second stopper and the third stopper are respectively used to block the first air inlet, the first air outlet and the end of the second air outlet close to the cavity.

[0014] Optionally, a plurality of baffles are installed on the inner wall of the valve body located in the cavity, and the baffles can cover one end of the guide hole close to the cavity.

[0015] By adopting the above technical solution, the operator closes the furnace body after stacking the workpieces, and the control component drives the guide bowl to rotate so that the cavity is only connected to the second air outlet, and the vacuum device is started to extract the air in the furnace body and the cavity. The control component drives the guide bowl to rotate clockwise so that the cavity is only connected to the first air inlet, and the baffle also exposes the guide hole; the nitrogen supply device is started for nitrogen replacement. When purging is required, the control component drives the guide bowl to continue to rotate clockwise for one end distance. At this time, only the first air inlet is connected to the cavity, but the baffle blocks a part of the guide hole, and the air flow pressure through the guide hole becomes larger. Under the guidance of the guide hole, the air flow forms a rotating airflow blowing toward the furnace body to purge the workpieces in the furnace body. When the pressure in the furnace body exceeds the specified safety value, the control component drives the guide bowl to rotate counterclockwise so that the cavity is only connected to the first air outlet, and the baffle also exposes the guide hole. Start the nitrogen collection device, and the nitrogen in the furnace body leaves from the guide hole, the cavity and the first air outlet. The provision of the first stopper, the second stopper and the third stopper can reduce the possibility of nitrogen leakage from the furnace body or external air entering the high-temperature furnace body due to loose connection between the nitrogen supply device, the nitrogen collection device and the vacuum device and the gas pipe, thereby reducing nitrogen waste, maintaining the nitrogen pressure in the furnace body, and reducing the possibility of safety accidents caused by external air entering the furnace body.

[0016] Optionally, the sealing member comprises an outer ring and an inner ring, the inner circumferential wall of the outer ring and the outer circumferential wall of the inner ring being integrally formed; the outer ring is mounted on the side wall of the tooling plate at the through hole, and the outer ring is connected to the tooling plate and the valve body; the side wall of the inner ring away from the furnace body abuts against the guide bowl, the inner ring presses the guide bowl against the valve body, and the inner ring and the guide bowl slide in cooperation; the side wall of the inner ring away from the valve body protrudes beyond the plane where the side wall of the outer ring away from the valve body is located, and the side wall of the inner ring away from the valve body abuts against the outer wall of the furnace body at the through hole; the inner ring is made of flexible metal material.

[0017] By adopting the above technical solution, when installing the purge device, the operator moves the valve body closer to the tooling plate from the side of the tooling plate away from the furnace body until the side wall of the valve body close to the furnace body is in contact with the side wall of the tooling plate away from the furnace body, and puts the guide bowl into the cavity. Move the outer ring closer to the tooling plate from the other side until the inner ring is in contact with the guide bowl. Connect the outer ring to the valve body by bolts, and the valve body and the outer ring clamp the tooling plate from both sides of the tooling plate. At this time, the inner ring presses the guide bowl against the side wall of the cavity. Then move the tooling plate closer to the furnace body until the side wall of the inner ring away from the valve body is in contact with the side wall of the furnace body at the through hole. Connect the tooling plate to the wing plate by bolts, and tighten the bolts until the tooling plate presses the inner ring against the furnace body through the outer ring. At this time, the inner ring is slightly deformed, and a sealed connection between the inner ring and the furnace body is achieved. The installation process is simple and convenient for cleaning and replacement.

[0018] Optionally, the output end of the nitrogen collecting device is connected to a nitrogen circulation device, and the nitrogen circulation device is used to clean impurities in the nitrogen for recycling.

[0019] By adopting the above technical solution, the purged nitrogen contains impurities and oil stains. The nitrogen collection device inputs the extracted nitrogen into the nitrogen circulation device for cleaning. The cleaned nitrogen can be reused to improve economic benefits.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The operator installs the diverter valve on the tooling plate through the seal, and then installs the tooling plate on the furnace body. The diverter valve and the seal are connected to the inside of the furnace body. After the operator stacks the workpieces in the furnace body, the furnace body is closed, the nitrogen supply device and the nitrogen collection device are turned off, and the vacuum device is started to extract the air inside the furnace body through the diverter valve and then closed. The nitrogen supply device is started to fill the diverter valve with nitrogen, and the nitrogen enters the furnace body through the diverter valve to complete the gas replacement. When the furnace reaches the design temperature, the nitrogen supply device is started to fill the diverter valve with high-pressure nitrogen. The high-pressure nitrogen is guided by the diverter valve to form an airflow to blow out of the diverter valve. The airflow is blown toward the workpiece in the furnace body to purge the workpiece. When the pressure in the furnace is higher than the safety value after purging, the nitrogen supply device is turned off and the nitrogen collection device is started. The nitrogen collection device extracts the excess nitrogen in the furnace body and maintains the pressure in the furnace body in accordance with the design requirements during the entire annealing process. Reduce the impact of the pressure in the furnace on the annealing effect of the workpiece, and avoid safety accidents caused by excessive furnace pressure. The purge rod of the prior art is replaced by a diversion valve to achieve external purging of the furnace; thus, safety accidents caused by the purge rod falling off are avoided, and the safety of the purge device is improved;

[0022] 2. When it is necessary to purge the workpiece in the furnace body, the nitrogen supply device injects high-pressure nitrogen into the cavity, and the high-pressure nitrogen fills the gap between the guide bowl and the cavity. High-pressure nitrogen is input from the end of the guide hole close to the outside of the guide bowl, and under the guidance of the guide hole, it is blown out from the end of the guide hole close to the inside of the guide bowl along the extension direction of the guide hole. The high-pressure airflows blown out from multiple guide holes converge clockwise along the circumference of the guide bowl toward the furnace body, and form a high-pressure airflow that is close to the furnace body and rotates around the axis of the guide bowl, entering the furnace body to purge the workpiece in the furnace body. By guiding the direction of the airflow through the guide holes, the guide valve can use the high-pressure nitrogen airflow to purge the workpiece outside the furnace; compared with the purge rod in the prior art, the setting of the guide valve avoids safety accidents in the furnace caused by the purge rod falling off, and improves the safety of the use of the purge device;

[0023] 3. After the operator stacks the workpieces, the furnace body is closed. The control unit drives the guide bowl to rotate so that the cavity is connected only to the second air outlet, and the vacuum device is started to extract the air in the furnace body and the cavity. The control unit drives the guide bowl to rotate clockwise so that the cavity is connected only to the first air inlet, and the baffle also exposes the guide hole; the nitrogen supply device is started for nitrogen replacement. When purging is required, the control unit drives the guide bowl to continue to rotate clockwise for one end. At this time, only the first air inlet is connected to the cavity, but the baffle blocks part of the guide hole. The airflow pressure through the guide hole becomes larger, and the airflow forms a rotating airflow blowing toward the furnace body under the guidance of the guide hole to purge the workpieces in the furnace body. When the pressure in the furnace body exceeds the specified safety value, the control unit drives the guide bowl to rotate counterclockwise so that the cavity is connected only to the first air outlet, and the baffle also exposes the guide hole. Start the nitrogen collection device, and the nitrogen in the furnace body leaves from the guide hole, the cavity and the first air outlet. The provision of the first stopper, the second stopper and the third stopper can reduce the possibility of nitrogen leakage from the furnace body or external air entering the high-temperature furnace body due to loose connection between the nitrogen supply device, the nitrogen collection device and the vacuum device and the gas pipe, thereby reducing nitrogen waste, maintaining the nitrogen pressure in the furnace body, and reducing the possibility of safety accidents caused by external air entering the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the Junkers annealing furnace purge device according to an embodiment of the present application.

[0025] Figure 2 It is an exploded view of the Junkers annealing furnace purge device according to an embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the structure of the guide valve and the sealing member according to the embodiment of the present application.

[0027] Figure 4 This is a cross-sectional view of an embodiment of the present application to illustrate the internal structure of the valve body.

[0028] Explanation of the reference numerals: 1. tooling plate; 2. furnace body; 21. wing plate; 3. guide valve; 31. valve body; 311. first air inlet; 312. first air outlet; 313. second air outlet; 314. control hole; 32. guide bowl; 321. guide hole; 33. cavity; 34. first stopper; 35. second stopper; 36. third stopper; 37. baffle; 4. sealing member; 41. outer ring; 42. inner ring; 5. nitrogen supply device; 6. nitrogen collection device; 7. vacuum device; 8. control member; 81. control rod; 82. control turbine; 83. control vortex rod. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] The present application embodiment discloses a Junkers annealing furnace purge device. Figure 1 and Figure 2 The purge device of the Junker annealing furnace includes a tooling plate 1, which is mounted on a furnace body 2. A wing plate 21 is mounted on the side wall of the furnace body 2 close to the tooling plate 1, and the wing plate 21 is connected to the tooling plate 1 by bolts. A through hole is opened on the side wall of the furnace body 2 close to the tooling plate 1, and a through hole is opened on the tooling plate 1 corresponding to the through hole of the furnace body 2. A seal 4 is arranged on the tooling plate 1 at the through hole, and the seal 4 is mounted on the tooling plate 1. One end of the seal 4 close to the furnace body 2 can be abutted against the outer wall of the furnace body 2 at the through hole, and the seal 4 is connected to the inside of the furnace body 2. A diverter valve 3 is arranged on the side of the tooling plate 1 away from the furnace body 2, and the diverter valve 3 is mounted on the tooling plate 1; one end of the seal 4 away from the furnace body 2 is connected to the diverter valve 3, and the diverter valve 3 is connected to the seal 4, so that the diverter valve 3 is connected to the inside of the furnace body 2. The diversion valve 3 is connected to a nitrogen supply device 5, a nitrogen collection device 6 and a vacuum device 7, which are all installed on the ground. The output end of the nitrogen collection device 6 is connected to a nitrogen circulation device, which is used to clean impurities in the nitrogen for recycling nitrogen.

[0031] The operator aligns the diverter valve 3 with the through hole on the tooling plate 1, installs the seal 4 on the tooling plate 1 from the side of the tooling plate 1 away from the diverter valve 3, and connects the end of the seal 4 close to the diverter valve 3 to the diverter valve 3, and the diverter valve 3 is installed on the tooling plate 1 through the seal 4. The tooling plate 1 with the seal 4 and the diverter valve 3 installed is aligned with the wing plate 21 on the furnace body 2, and the tooling plate 1 is fixed to the furnace body 2 by bolts. At this time, the end of the seal 4 away from the diverter valve 3 is against the side wall of the furnace body 2 at the through hole, and the diverter valve 3 is sealed and connected to the furnace body 2 through the seal 4, and the diverter valve 3 and the seal 4 are connected to the inside of the furnace body 2. The diverter valve 3 replaces the purge rod of the prior art to avoid safety accidents caused by the purge rod falling off.

[0032] After the operator stacks the workpieces in the furnace body 2, the furnace body 2 is closed. At this time, the nitrogen supply device 5 is in a closed state, and the vacuum device 7 is started. The vacuum device 7 extracts the air inside the furnace body 2 through the diverter valve 3 and then closes. The nitrogen supply device 5 is started, and the nitrogen supply device 5 fills the diverter valve 3 with nitrogen. The nitrogen enters the furnace body 2 through the diverter valve 3 to complete the gas replacement; when the nitrogen pressure in the furnace reaches the design requirement, the nitrogen supply device 5 is closed, and the furnace body 2 heats the workpiece in the furnace under the protection of the inert gas. When the furnace reaches the design temperature, the nitrogen supply device 5 is started, and the nitrogen supply device 5 fills the diverter valve 3 with high-pressure nitrogen. The high-pressure nitrogen is guided by the diverter valve 3 to form an airflow to blow out of the diverter valve 3. The airflow is blown toward the workpiece in the furnace body 2 to purge the workpiece. When the pressure in the furnace is higher than the safety value after purging, the nitrogen supply device 5 is turned off and the nitrogen collecting device 6 is started. The nitrogen collecting device 6 extracts the excess nitrogen in the furnace body 2, and maintains the pressure in the furnace body 2 in accordance with the design requirements during the entire annealing process. The influence of the pressure in the furnace on the annealing effect of the workpiece is reduced, and safety accidents caused by excessive furnace pressure are avoided. The setting of the guide valve 3 realizes purging outside the furnace and improves the safety of the use of the purging device.

[0033] The nitrogen collected by the nitrogen collecting device 6 contains impurities and oil stains. The nitrogen collecting device 6 inputs the extracted nitrogen into the nitrogen circulation device for cleaning. The cleaned nitrogen can be reused to improve economic benefits.

[0034] Reference Figure 2 and Figure 3 The diverter valve 3 includes a valve body 31, the side wall of the valve body 31 close to the furnace body 2 is in contact with the side wall of the tooling plate 1 at the through hole, the end of the seal 4 away from the furnace body 2 passes through the tooling plate 1 and is connected to the valve body 31, and the valve body 31 is installed on the tooling plate 1 through the seal 4. A cavity 33 is arranged inside the valve body 31, and the cavity 33 passes through the side wall of the valve body 31 close to the tooling plate 1. The cavity 33 is concentrically arranged with the through holes on the tooling plate 1 and the furnace body 2. The nitrogen supply device 5, the nitrogen collection device 6 and the vacuum device 7 are all connected to the cavity 33.

[0035] A flow guide bowl 32 is provided in the cavity 33, and the side wall of the flow guide bowl 32 away from the seal 4 is in contact with the side wall of the cavity 33. The distance between the flow guide bowl 32 and the side wall of the seal 4 is smaller than the diameter of the cavity 33, and there is a gap between the peripheral wall of the flow guide bowl 32 and the peripheral wall of the cavity 33. A plurality of flow guide holes 321 are provided on the peripheral wall of the flow guide bowl 32. In this embodiment, eight flow guide holes 321 are provided. The eight flow guide holes 321 are evenly arranged along the circumference of the flow guide bowl 32, and each flow guide hole 321 is connected to the gap between the cavity 33 and the flow guide bowl 32. The peripheral wall of the flow guide bowl 32 is tilted outward from the valve body 31 to the furnace body 2. The length direction of the flow guide hole 321 is at an angle with the vertical direction, and one end of each flow guide hole 321 close to the furnace body 2 is arranged toward the center of the through hole on the furnace body 2. The length direction of the flow guide hole 321 is tilted clockwise along the circumference of the flow guide bowl 32.

[0036] When it is necessary to purge the workpiece in the furnace body 2, the nitrogen supply device 5 injects high-pressure nitrogen into the cavity 33, and the high-pressure nitrogen fills the gap between the guide bowl 32 and the cavity 33. The high-pressure nitrogen is input from the end of the guide hole 321 close to the outside of the guide bowl 32, and under the guidance of the guide hole 321, it is blown out from the end of the guide hole 321 close to the inside of the guide bowl 32 along the extension direction of the guide hole 321. The high-pressure airflows blown out by the multiple guide holes 321 converge clockwise along the circumference of the guide bowl 32 toward the direction close to the furnace body 2, and form a high-pressure airflow close to the furnace body 2 and rotating around the axis of the guide bowl 32 as the axis, entering the furnace body 2 to purge the workpiece in the furnace body 2.

[0037] Reference Figure 3 , the guide bowl 32 is slidably matched with the valve body 31 and the seal 4, and the seal 4 limits the guide bowl 32 in the cavity 33. The guide bowl 32 is connected with a control member 8, and the control member 8 is installed on the side wall of the valve body 31 away from the furnace body 2. A control hole 314 is provided on the side wall of the valve body 31 away from the furnace body 2, and the movable end of the control member 8 extends into the valve body 31 through the control hole 314 and is connected to the guide bowl 32 by bolts, and the control member 8 drives the guide bowl 32 to rotate with its axial direction as the axis. In this embodiment, the control member 8 includes a control rod 81, one end of the control rod 81 is connected to the side wall of the guide bowl 32 away from the seal 4, and the other end extends out of the control hole 314 from the valve body 31. The end of the control rod 81 extending out of the valve body 31 is connected to a control turbine 82, and the control turbine 82 rotates synchronously with the control rod 81. A control worm 83 is provided on one side of the control turbine 82, and the control worm 83 is meshed with the control turbine 82, and the control worm 83 is driven by a motor. The motor drives the control worm 83 to reciprocate, and the reciprocating rotation of the control worm 83 drives the control turbine 82 to reciprocate, and the reciprocating rotation of the control turbine 82 drives the guide bowl 32 to reciprocate in a clockwise or counterclockwise direction through the control rod 81.

[0038] A plurality of baffles 37 are installed on the inner wall of the cavity 33 of the valve body 31. In this embodiment, eight baffles 37 are arranged corresponding to eight guide holes 321, and the eight baffles 37 are evenly arranged along the circumference of the cavity 33. The side wall of the baffle 37 near the center of the cavity 33 is in contact with the outer wall of the guide bowl 32, and the baffle 37 can cover the end of the guide hole 321 near the outside of the guide bowl 32. When the baffle 37 covers a part of the guide hole 321, the cross-sectional area of ​​the guide hole 321 is reduced; the nitrogen flow rate supplied by the nitrogen supply device 5 remains unchanged, but the pressure of the nitrogen when passing through the guide hole 321 increases, thereby improving the purging effect.

[0039] Reference Figure 4 The top wall of the valve body 31 is provided with a first air inlet 311, a first air outlet 312, and a second air outlet 313, and the ends of the first air inlet 311, the first air outlet 312, and the second air outlet 313 away from the top wall are respectively connected to the cavity 33. The nitrogen supply device 5 is connected to the first air inlet 311 through an air pipe, the nitrogen collection device 6 is connected to the first air outlet 312 through an air pipe, and the vacuum device 7 is connected to the second air outlet 313 through an air pipe.

[0040] A first stopper 34, a second stopper 35 and a third stopper 36 are installed on the outer peripheral wall of the guide bowl 32, and the first stopper 34, the second stopper 35 and the third stopper 36 are arranged at intervals along the circumference of the guide bowl 32; the first stopper 34, the second stopper 35 and the third stopper 36 are respectively used to block the first air inlet hole 311, the first air outlet hole 312 and the second air outlet hole 313 close to one end of the cavity 33.

[0041] When the workpieces in the furnace body 2 are stacked, the control unit 8 drives the guide bowl 32 to rotate so that the first stopper 34 blocks the first air inlet 311, the second stopper 35 blocks the first air outlet 312, and the third stopper 36 exposes the second air outlet 313. At this time, only the second air outlet 313 is connected to the cavity 33. The vacuum pump 7 is started, and the air in the furnace body 2 and the cavity 33 leaves through the second air outlet 313 until the pressure in the furnace body 2 drops to the set value and then stops. The control unit 8 drives the guide bowl 32 to rotate clockwise so that the third stopper 36 blocks the second air outlet 313, the first stopper 34 exposes the first air inlet 311, and the second stopper 35 blocks the first air outlet 312. At this time, only the first air inlet 311 is connected to the cavity 33; at this time, the baffle 37 also exposes the guide hole 321. The nitrogen supply device 5 is started, and the nitrogen enters the gap between the cavity 33 and the guide bowl 32 through the first air inlet hole 311, and then enters the furnace body 2 through the guide hole 321 for nitrogen replacement.

[0042] When purging is required, the control component 8 drives the guide bowl 32 to continue to rotate one end distance clockwise, the first block 34 still exposes the first air inlet 311, the second block 35 still blocks the first air outlet 312, and the third block 36 still blocks the second air outlet 313. At this time, the baffle 37 blocks a part of the guide hole 321, and the air flow pressure through the guide hole 321 becomes larger, so that the workpiece in the furnace body 2 is purged.

[0043] When the pressure in the furnace body 2 exceeds the specified safety value, the control member 8 drives the guide bowl 32 to rotate counterclockwise so that the first stopper 34 blocks the first air inlet 311, the second stopper 35 exposes the first air outlet 312, and the third stopper 36 still blocks the second air outlet 313. At this time, only the first air outlet 312 is connected to the cavity 33, and the baffle 37 also exposes the guide hole 321. The nitrogen collecting device 6 is started, and the nitrogen in the furnace body 2 leaves from the guide hole 321, the cavity 33 and the first air outlet 312.

[0044] The provision of the first stopper 34, the second stopper 35 and the third stopper 36 can reduce the possibility of leakage of nitrogen in the furnace body 2 or entry of external air into the high-temperature furnace body 2 due to loose connection between the nitrogen supply device 5, the nitrogen collection device 6 and the vacuum device 7 and the air pipe, thereby reducing nitrogen waste, maintaining the nitrogen pressure in the furnace body 2, and reducing the possibility of safety accidents caused by entry of external air into the furnace body 2.

[0045] Reference Figure 2 and Figure 3 The seal 4 includes an outer ring 41 and an inner ring 42. The inner peripheral wall of the outer ring 41 and the outer peripheral wall of the inner ring 42 are integrally formed. The outer ring 41 is mounted on the side wall of the tooling plate 1 at the through hole by bolts, and the outer ring 41 is connected to the tooling plate 1 and the valve body 31. The side wall of the inner ring 42 away from the furnace body 2 abuts against the guide bowl 32, and the inner ring 42 presses the guide bowl 32 against the valve body 31, and the inner ring 42 and the guide bowl 32 are slidably matched. The side wall of the inner ring 42 away from the valve body 31 protrudes from the plane where the side wall of the outer ring 41 away from the valve body 31 is located, and the side wall of the inner ring 42 away from the valve body 31 abuts against the outer wall of the furnace body 2 at the through hole. The inner ring 42 is made of a flexible metal material.

[0046] When installing the purge device, the operator moves the valve body 31 closer to the tooling plate 1 from the side of the tooling plate 1 away from the furnace body 2 until the side wall of the valve body 31 close to the furnace body 2 is in contact with the side wall of the tooling plate 1 away from the furnace body 2, and puts the guide bowl 32 into the cavity 33. Move the outer ring 41 closer to the tooling plate 1 from the other side until the inner ring 42 is in contact with the guide bowl 32. Connect the outer ring 41 to the valve body 31 by bolts, and the valve body 31 and the outer ring 41 clamp the tooling plate 1 from both sides of the tooling plate 1. At this time, the inner ring 42 presses the guide bowl 32 against the side wall of the cavity 33. Then move the tooling plate 1 closer to the furnace body 2 until the side wall of the inner ring 42 away from the valve body 31 is in contact with the side wall of the furnace body 2 at the through hole. The tooling plate 1 is connected to the wing plate 21 by bolts, and the bolts are tightened until the tooling plate 1 presses the inner ring 42 against the furnace body 2 through the outer ring 41. At this time, the inner ring 42 is slightly deformed to achieve a sealed connection between the inner ring 42 and the furnace body 2.

[0047] The implementation principle of the Junker annealing furnace purge device of the embodiment of the present application is as follows: the operator installs the valve body 31 on the tooling plate 1 through the seal 4, and then installs the tooling plate 1 on the furnace body 2, and the cavity 33 is connected to the inside of the furnace body 2. The operator closes the furnace body 2 after stacking the workpieces, and the control part 8 drives the guide bowl 32 to rotate so that the cavity 33 is only connected to the second air outlet 313, and the vacuum device 7 is started to extract the air in the furnace body 2 and the cavity 33. The control part 8 drives the guide bowl 32 to rotate clockwise so that the cavity 33 is only connected to the first air inlet 311, and the baffle 37 also exposes the guide hole 321; the nitrogen supply device 5 is started for nitrogen replacement. When purging is required, the control component 8 drives the guide bowl 32 to continue to rotate clockwise for a distance. At this time, only the first air inlet 311 is connected to the cavity 33, but the baffle 37 blocks a part of the guide hole 321. The airflow pressure through the guide hole 321 becomes larger, and the airflow forms a rotating airflow blowing toward the furnace body 2 under the guidance of the guide hole 321 to purge the workpiece in the furnace body 2. When the pressure in the furnace body 2 exceeds the specified safety value, the control component 8 drives the guide bowl 32 to rotate counterclockwise so that the cavity 33 is only connected to the first air outlet 312, and the baffle 37 also exposes the guide hole 321. Start the nitrogen collection device 6, and the nitrogen in the furnace body 2 leaves from the guide hole 321, the cavity 33 and the first air outlet 312. The guide valve 3 replaces the purge rod of the prior art to achieve purging outside the furnace; avoid safety accidents caused by the purge rod falling off, and improve the safety of the purge device.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A purge device for a Junkers annealing furnace, characterized in that: The invention comprises a tooling plate (1), wherein the tooling plate (1) is mounted on a furnace body (2), the furnace body (2) being provided with a through hole, and the tooling plate (1) being provided with a through hole corresponding to the through hole of the furnace body (2); a flow guide valve (3) is arranged on a side of the tooling plate (1) away from the furnace body (2), a sealing member (4) is arranged on the tooling plate (1) at the through hole, an end of the sealing member (4) away from the tooling plate (1) is connected to the flow guide valve (3), and an end of the sealing member (4) away from the flow guide valve (3) is communicated with the furnace body (2), so that the flow guide valve (3) is communicated with the furnace body (2); and a nitrogen supply device (5), a vacuum pumping device (7) and a nitrogen collecting device (6) are communicated with the flow guide valve (3).

2. The purge device for a Junkers annealing furnace according to claim 1, characterized in that: The diversion valve (3) comprises a valve body (31) and a diversion bowl (32); the valve body (31) is mounted on the tooling plate (1) via a sealing member (4); a cavity (33) is arranged inside the valve body (31); the cavity (33) penetrates the side wall of the valve body (31) close to the tooling plate (1); a first air inlet (311), a first air outlet (312) and a second air outlet (313) are arranged on the top wall of the valve body (31); the first air inlet (311), the first air outlet (312) and the second air outlet (313) are respectively connected to the cavity (33); the nitrogen supply device (5) is connected to the first air inlet (311) via an air pipe; the nitrogen collection device (6) is connected to the first air outlet (312) via an air pipe. The vacuum pump (7) is connected to the second air outlet (313) through the air pipe; the guide bowl (32) is arranged in the cavity (33); the side wall of the guide bowl (32) away from the furnace body (2) is in contact with the side wall of the cavity (33); the outer peripheral wall of the guide bowl (32) close to the furnace body (2) is in contact with the inner peripheral wall of the cavity (33); a gap exists between the outer peripheral wall of the guide bowl (32) and the inner wall of the cavity (33); the sealing member (4) restricts the guide bowl (32) in the cavity (33); a plurality of guide holes (321) are opened on the peripheral wall of the guide bowl (32); the plurality of guide holes (321) are evenly arranged along the circumference of the guide bowl (32); and the plurality of guide holes (321) are all in contact with the cavity (33).

3. The purge device for a Junkers annealing furnace according to claim 2, characterized in that: The peripheral wall of the guide bowl (32) is arranged to be inclined outward from the valve body (31) toward the furnace body (2); the length direction of the guide hole (321) is at an angle to the vertical direction; and one end of each guide hole (321) close to the furnace body (2) is arranged toward the center of the through hole on the furnace body (2).

4. The purge device for a Junkers annealing furnace according to claim 3, characterized in that: The length direction of each of the guide holes (321) is arranged to be inclined clockwise along the circumference of the guide bowl (32).

5. The purge device for a Junkers annealing furnace according to claim 2, characterized in that: The guide bowl (32) is slidably matched with the valve body (31) and the sealing member (4); a control member (8) is installed on the valve body (31); a control hole (314) is opened on the side wall of the valve body (31) away from the furnace body (2); a movable end of the control member (8) passes through the control hole (314) and is connected to the guide bowl (32) to drive the guide bowl (32) to rotate along its circumferential direction; a first stopper (34), a second stopper (35) and a third stopper (36) are installed on the guide bowl (32); the first stopper (34), the second stopper (35) and the third stopper (36) are arranged at intervals along the circumferential direction of the guide bowl (32); the first stopper (34), the second stopper (35) and the third stopper (36) are respectively used to cover the first air inlet (311), the first air outlet (312) and one end of the second air outlet (313) close to the cavity (33).

6. The purge device for a Junkers annealing furnace according to claim 5, characterized in that: A plurality of baffles (37) are installed on the inner wall of the valve body (31) located in the cavity (33), and the baffles (37) can cover one end of the guide hole (321) close to the cavity (33).

7. The purge device for a Junkers annealing furnace according to claim 5, characterized in that: The sealing member (4) comprises an outer ring (41) and an inner ring (42), wherein the inner peripheral wall of the outer ring (41) and the outer peripheral wall of the inner ring (42) are integrally formed; the outer ring (41) is mounted on the side wall of the tooling plate (1) at the through hole, and the outer ring (41) is connected to the tooling plate (1) and the valve body (31); the side wall of the inner ring (42) away from the furnace body (2) abuts against the guide bowl (32), the inner ring (42) presses the guide bowl (32) against the valve body (31), and the inner ring (42) and the guide bowl (32) are slidably matched; the side wall of the inner ring (42) away from the valve body (31) protrudes from the plane where the side wall of the outer ring (41) away from the valve body (31) is located, and the side wall of the inner ring (42) away from the valve body (31) abuts against the outer side wall of the furnace body (2) at the through hole; the inner ring (42) is made of a flexible metal material.

8. The Junkers annealing furnace purge device according to claim 1, characterized in that: The output end of the nitrogen collecting device (6) is connected to a nitrogen circulation device, and the nitrogen circulation device is used to clean impurities in the nitrogen for recycling.

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