An automatic oxygen control method and device for sintered NdFeB

Abstract

The present invention discloses an automatic oxygen control method and device for sintered NdFeB, including the following steps: A: The box door operates to make the control member work; B: The control member in operation is used to make the nitrogen inlet valve located above work to supplement nitrogen into the main body of the discharge box, and the oxygen discharge valve located below work to discharge the air in the main body of the discharge box; C: Keep the oxygen content in the main body of the discharge box not exceeding the limit value range, and the limit value range is the oxygen content range in the main body of the discharge box, and the limit value range is the set value. Since the quality of nitrogen is lower than that of air, the present invention sets the air inlet above the exhaust port, which can effectively reduce the oxygen content in the discharge box during operation, enabling the effective progress of sintered NdFeB. When the box door is closed and the cylinder controlling the lifting table is in the starting state, opening the box door or pressing the first button causes the lifting table in the main body of the discharge box to descend to protect the oxygen content inside the box.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen control for sintered neodymium iron boron, and particularly to an automatic oxygen control method and device for sintered neodymium iron boron. Background Art

[0002] Before sintering, the neodymium iron boron blank is prone to oxidation. It is necessary to use nylon bags to package the neodymium iron boron to isolate it from external oxygen and prevent its oxidation. The packaging of the neodymium iron boron blank is generally carried out in an environment with extremely low oxygen content. Therefore, it is very important to obtain an automatic oxygen control method and device for sintered neodymium iron boron. Summary of the Invention

[0003] To solve the above technical problems, on the one hand, the present invention provides an automatic oxygen control method for sintered neodymium iron boron, including the following steps:

[0004] A: The box door operates to make the control member work;

[0005] B: Using the working control member to make the nitrogen inlet valve located above work to supplement nitrogen into the main body of the discharge box, and the oxygen discharge valve located below work to discharge the air in the main body of the discharge box;

[0006] C: Keep the oxygen content in the main body of the discharge box not exceeding the specified value range, and the specified value range is the oxygen content range in the main body of the discharge box, and the specified value range is the set value.

[0007] The specified range is only set to the minimum value.

[0008] The control member includes a travel switch. When the box door of the main body of the discharge box is closed, the travel switch is closed and conducts electricity, and the nitrogen inlet valve and the oxygen discharge valve work within a specified time. It also includes a first button. When the box door is closed and the cylinder controlling the lifting table is in the starting state, pressing the first button or opening the box door causes the lifting table located in the main body of the discharge box to descend to protect the oxygen content inside the main body of the discharge box; it includes a second button, and the second button is an emergency stop button when the lifting table rises.

[0009] The control member also includes an oxygen analysis device and a control device. When the box door of the main body of the discharge box is closed, the oxygen analysis device obtains the oxygen content information in the main body of the discharge box. If the oxygen content is too high, the control device controls the nitrogen inlet valve located above to open to supplement nitrogen, and the control device controls the oxygen discharge valve located below to open to discharge air.

[0010] Both the nitrogen inlet valve and the oxygen discharge valve are arranged on the main body of the discharge box, and the nitrogen inlet valve is arranged above the oxygen discharge valve, and the nitrogen inlet valve and the oxygen discharge valve are arranged opposite to each other.

[0011] The intake time and the exhaust time are 0 - 6 minutes; preferably, the intake time is 2 minutes and 45 seconds, and the exhaust time is 2 minutes.

[0012] It further includes the following step: when the cylinder receives a control signal, the cylinder controls the lifting platform located inside the main body of the discharge box to rise or fall.

[0013] Since the sintering of neodymium iron boron needs to be carried out in an environment with extremely low oxygen content, when the oxygen analysis device monitors that the oxygen content in the discharge box is relatively high, the nitrogen inlet valve is controlled to open, nitrogen is filled into the main body of the discharge box, and the oxygen discharge valve is controlled to open to discharge the oxygen-containing air. Since the mass of nitrogen is lower than that of air, the exhaust port is arranged on the discharge box below the intake port. When taking out the packaged neodymium iron boron, the box door is opened and the nitrogen filling valve is opened, which can prevent the neodymium iron boron from contacting with the oxygen in the air.

[0014] On the other hand, an automatic oxygen control device for sintering neodymium iron boron according to the present invention includes a main body of a discharge box, and a nitrogen inlet valve and an exhaust port are provided on the main body of the discharge box, and the intake port is located above the exhaust port; a nitrogen inlet valve is provided at the intake port, and an oxygen discharge valve is provided at the exhaust port.

[0015] It further includes an oxygen analysis device for monitoring the oxygen content inside the main body of the discharge box and a control device. The oxygen analysis device obtains the oxygen content information inside the main body of the discharge box. If the oxygen content is too high, the control device controls the nitrogen inlet valve located above to open to supplement nitrogen, and the control device controls the oxygen discharge valve located below to open to discharge air.

[0016] A lifting platform is provided inside the box, and the lifting platform is controlled by a cylinder to rise and fall. A box door is provided on the main body of the discharge box, the box door is connected to a travel switch, and the travel switch is connected to the control device.

[0017] Compared with the prior art, the advantages of the present invention are as follows: since the mass of nitrogen is lower than that of air, the intake port of the present invention is arranged above the exhaust port, which can effectively reduce the oxygen content inside the discharge box during operation, enabling the effective sintering of neodymium iron boron, and the oxygen content analysis inside the discharge box is carried out through the oxygen analysis device, which can achieve automatic oxygen control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structure of the automatic oxygen control device of the present invention Figure 1 ;

[0019] Figure 2 is a three-dimensional structure of the automatic oxygen control device of the present invention Figure 2 ;

[0020] Figure 3 is an electrical control schematic diagram of the automatic control device of the present invention;

[0021] Figure 4 is a schematic side cross-sectional view of the present invention.

[0022] Reference Numerals: 1 - main body of the discharge box; 2 - oxygen analysis device; 3 - nitrogen inlet valve; 4 - oxygen discharge valve; 5 - lifting platform; 6 - travel switch; 7 - feed inlet; 8 - cylinder; 9 - sealing ring; 10 - box body. Detailed Embodiments

[0023] To enable those skilled in the art to better understand the present invention and thus more clearly define the scope of protection of the present invention, the present invention will be described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only some specific embodiments of the concept of the present invention, and only a part of the embodiments of the present invention. The specific and direct descriptions of the relevant structures are only for the convenience of understanding the present invention, and each specific feature does not of course and directly limit the scope of implementation of the present invention.

[0024] On the one hand, the present invention provides an automatic oxygen control method for sintered neodymium iron boron, including the following steps:

[0025] A: The box door of the box body acts to make the control member work;

[0026] B: Using the control member in operation to make the nitrogen inlet valve located above work to supplement nitrogen into the main body of the discharge box, and the oxygen discharge valve located below work to discharge the air in the main body of the discharge box;

[0027] C: Keeping the oxygen content in the main body of the discharge box not exceeding the limited value range, the limited value range is the oxygen content range in the main body of the discharge box, and the limited value range is the set value.

[0028] The limited range is only set to the minimum value.

[0029] The control member includes a travel switch. When the box door of the main body of the discharge box is closed, the travel switch is closed and conducted, and the nitrogen inlet valve and the oxygen discharge valve work within a limited time. It also includes a first button. When the box door is closed and the cylinder for controlling the lifting platform is in the starting state, pressing the first button or opening the box door, the lifting platform located in the main body of the discharge box descends to protect the oxygen content inside the box; it also includes a second button, and the second button is an emergency stop button when the lifting platform rises.

[0030] The control member also includes an oxygen analysis device and a control device. When the box door of the main body of the discharge box is closed, the oxygen analysis device obtains the oxygen content information in the main body of the discharge box. If the oxygen content is too high, the control device controls the nitrogen inlet valve located above to open to supplement nitrogen, and the control device controls the oxygen discharge valve located below to open to discharge air.

[0031] Both the nitrogen inlet valve and the oxygen discharge valve are arranged on the main body of the discharge box, and the nitrogen inlet valve is arranged above the oxygen discharge valve, and the nitrogen inlet valve and the oxygen discharge valve are arranged opposite to each other.

[0032] The intake time and the exhaust time are 0 - 6 minutes; preferably, the intake time is 2 minutes and 45 seconds, and the exhaust time is 2 minutes.

[0033] It further includes this step: when the cylinder obtains a control signal, the cylinder controls the lifting platform located inside the main body of the discharge box to rise or fall.

[0034] Since sintering neodymium iron boron needs to be carried out in an environment with extremely low oxygen content, when the oxygen analysis device monitors that the oxygen content in the discharge box is relatively high, the nitrogen inlet valve is controlled to open, nitrogen is filled into the discharge box, and the oxygen discharge valve is controlled to open to discharge the oxygen-containing air. Since the mass of nitrogen is lower than that of air, the exhaust port is arranged on the discharge box below the intake port.

[0035] On the other hand, an automatic oxygen control device for sintering neodymium iron boron of the present invention includes a main body of a discharge box. A nitrogen inlet valve and an exhaust port are provided on the main body of the discharge box, and the intake port is located above the exhaust port; a nitrogen inlet valve is provided at the intake port, and an oxygen discharge valve is provided at the exhaust port.

[0036] It further includes an oxygen analysis device for monitoring the oxygen content in the main body of the discharge box and a control device. The oxygen analysis device obtains the oxygen content information in the main body of the discharge box. If the oxygen content is too high, the control device controls the nitrogen inlet valve located above to open to supplement nitrogen, and the control device controls the oxygen discharge valve located below to open to discharge air.

[0037] A lifting platform is provided inside the box body, and the lifting platform is controlled by a cylinder to rise and fall. A box door is provided on the main body of the discharge box, the box door is connected to a travel switch, and the travel switch is connected to the control device.

[0038] Compared with the prior art, the advantages of the present invention are as follows: since the mass of nitrogen is lower than that of air, the intake port of the present invention is arranged above the exhaust port, which can effectively reduce the oxygen content in the discharge box during operation, enabling the effective sintering of neodymium iron boron, and through the oxygen analysis device for analyzing the oxygen content in the discharge box, automatic oxygen control can be achieved.

[0039] Such as Figure 1 、 2 As shown in and Figure 4, it further includes a material placing device. The material placing device includes a packaging chamber. The main body of the discharge box is connected to the packaging chamber. A feed port is provided on the packaging chamber. A discharge port is formed between the lifting platform and the packaging chamber. After the neodymium iron boron is packaged in the packaging chamber and placed on the lifting platform, the lifting platform descends, and after the box door is opened, the neodymium iron boron can be taken out after packaging.

[0040] Sealing rings are fixed on both the upper and lower surfaces of the plate at the discharge port, which can form a sealed space when the lifting platform moves up and down.

[0041] When the present invention is put into use, neodymium iron boron is packaged in a packaging room. At this time, an oxygen analysis device obtains the oxygen content information in the packaging room and transmits this information to a controller. If the oxygen content is too high, the nitrogen inlet valve and the oxygen exhaust valve are controlled to work. The packaged material is placed on a lifting platform. As Figure 3 shown, before the box door is opened, the cylinder coil is in the starting state. When the first button SB1 is pressed or the box door is suddenly opened, the travel switch SQ is disconnected and de-energized, and the cylinder coil is de-energized at the same time to provide an emergency descent of the lifting platform when the box door is accidentally opened to protect the oxygen content in the main body of the discharge box. When the box door is closed, the travel switch is turned on and energized. At this time, the coil KA is energized, the normally open contact of the coil KA is closed, and the normally closed contact is opened. At this time, the nitrogen inlet valve and the oxygen exhaust valve are opened, and the oxygen in the main body of the discharge box starts to be discharged. After the time relay reaches the set time, its normally open contact is disconnected, and the corresponding nitrogen inlet valve or oxygen exhaust valve stops working, and the cylinder coil is re-energized. The second button is used as an emergency stop button for the upward movement of the cylinder.

[0042] When the box door is closed, the oxygen analysis device detects the oxygen content inside. If the oxygen content is too high, the control device controls the nitrogen inlet valve located above to open to supplement nitrogen, and the control device controls the oxygen exhaust valve located below to open to discharge air.

[0043] Compared with the prior art, the advantages of the present invention are as follows: Since the mass of nitrogen is lower than that of air, the present invention sets the air inlet above the air outlet, which can effectively reduce the oxygen content in the main body of the discharge box during operation, enabling the effective sintering of neodymium iron boron. Moreover, by analyzing the oxygen content in the main body of the discharge box through the oxygen analysis device, automatic oxygen control can be achieved.

[0044] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. An automatic oxygen control method for sintered NdFeB, characterized in that: It includes a discharge box main body (1), and a nitrogen inlet valve (3) and an oxygen discharge valve (4) are arranged on the discharge box main body (1). The nitrogen inlet valve (3) is located above the oxygen discharge valve (4), and the two are arranged on opposite sides; A lifting table (5) is arranged inside the discharge box main body (1); The steps are as follows: A: The box door operates to make the control component work; B: Use the working control component to make the nitrogen inlet valve (3) located above work to supplement nitrogen into the discharge box main body (1), and the oxygen discharge valve (4) located below work to discharge the air in the discharge box main body (1); C: Keep the oxygen content in the discharge box main body from exceeding the limited value range, and the limited value range is the oxygen content range in the discharge box main body (1), and the limited value range is the set value; It also includes a first button. When the box door is closed and the cylinder (8) controlling the lifting table (5) is in the starting state, press the first button or open the box door, and the lifting table (5) located inside the discharge box main body (1) descends to protect the oxygen content inside the box. It also includes a second button, and the second button is the emergency stop button for the cylinder (8) when the lifting table (5) rises; It also includes a material placing device. The material placing device includes a packaging chamber. The discharge box main body is connected to the packaging chamber. An inlet port is arranged on the packaging chamber. A discharge port is formed between the lifting table and the packaging chamber. After the NdFeB is packaged in the packaging chamber, it is placed on the lifting table. The lifting table descends, and after the box door is opened, the NdFeB is taken out after packaging; The control component includes an oxygen analysis device (2) and a control device. The oxygen analysis device (2) obtains the oxygen content information in the discharge box main body (1). If the oxygen content is too high, the control device controls the nitrogen inlet valve (3) located above to open to supplement nitrogen, and the control device controls the oxygen discharge valve (4) located below to open to discharge air.

2. The automatic oxygen control method for sintered NdFeB according to claim 1, characterized in that: The control component includes a travel switch. When the box door of the discharge box main body (1) is closed, the travel switch is closed and conducts electricity, and the nitrogen inlet valve (3) and the oxygen discharge valve (4) work within a limited time.

3. The automatic oxygen control method for sintered NdFeB according to claim 1, characterized in that: A box door is arranged on the discharge box main body (1). The box door is connected to a travel switch (6), and the travel switch (6) is connected to the control device.

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