Weighing device, material mixing equipment and material mixing system

Abstract

The utility model relates to a weighing device, material mixing equipment and a material mixing system. The weighing device comprises a box body with a cavity; the first air inlet pipe is communicated with the cavity, and the first air inlet pipe is provided with a first control valve; the second air inlet pipe is communicated with the cavity and is provided with a second control valve; the pressure relief pipe is communicated with the cavity, and the pressure relief pipe is provided with a pressure relief valve; the oxygen meter is arranged in the box body and is used for detecting the oxygen content in the cavity; the weighing device is arranged in the cavity; one end of the feeding pipe extends into the cavity, and the feeding pipe is used for conveying materials to the weighing device; and one end of the discharging pipe extends into the cavity, and the weighing device is configured to convey the materials to the discharging pipe. According to the weighing device, the rare earth powder can be automatically weighed, the weighed powder is conveyed into the material tank, the working efficiency of weighing is improved, and potential safety hazards during production are reduced.

Description

Technical Field

[0001] This application relates to the field of magnet manufacturing, and more particularly to a weighing device, mixing equipment and mixing system. Background Technology

[0002] Neodymium iron boron magnets are widely used in industries such as new energy vehicles and smart consumer electronics due to their high coercivity and high energy product. In particular, with the development of new energy vehicles and electronic products in recent years, the market demand for neodymium iron boron magnets has increased dramatically.

[0003] In the preparation of NdFeB magnets, an appropriate amount of rare earth powder needs to be added to the NdFeB powder to obtain magnets with the desired properties. The rare earth powder needs to be manually weighed during the mixing process, which is inefficient and poses a safety hazard due to air ingress. Utility Model Content

[0004] To address the aforementioned issues, this application provides a weighing device, mixing equipment, and mixing system capable of automatically weighing powder.

[0005] In a first aspect, this application provides a weighing device, comprising:

[0006] The box-shaped enclosure has a cavity.

[0007] A first air intake pipe is connected to the cavity, and a first control valve is provided in the first air intake pipe;

[0008] A second air intake pipe is connected to the cavity, and a second control valve is provided in the second air intake pipe;

[0009] A pressure relief pipe is connected to the cavity, and the pressure relief pipe is equipped with a pressure relief valve;

[0010] An oxygen analyzer is installed in the housing and is used to detect the oxygen content inside the cavity;

[0011] A weighing device is disposed in the cavity;

[0012] A feed pipe extends into the cavity at one end, and the feed pipe is used to convey materials to the weighing device.

[0013] The discharge pipe extends into the cavity at one end, and the weighing device is configured to convey material to the discharge pipe.

[0014] According to some embodiments of this application, the weighing device further includes a baffle plate disposed at the end of the feed pipe.

[0015] According to some embodiments of this application, the weighing device includes:

[0016] An electronic scale is installed in the cavity;

[0017] The tipping bucket is mounted on the electronic scale.

[0018] According to some embodiments of this application, both the portion of the first air intake pipe located in the cavity and the portion of the second air intake pipe located in the cavity are provided with multiple air intake holes.

[0019] Secondly, this application provides a mixing device, comprising:

[0020] The weighing device as described above;

[0021] The first material tank is connected to the feed pipe of the weighing device;

[0022] The second material tank is connected to the discharge pipe of the weighing device.

[0023] According to some embodiments of this application, the mixing equipment further includes a vibrator, which is connected to the first material tank and the feed pipe respectively.

[0024] According to some embodiments of this application, the number of the first material tank, the vibrator, and the weighing device is at least two.

[0025] Thirdly, this application provides a mixing system, comprising:

[0026] The mixing equipment described above;

[0027] The first material tank and the weighing device of the mixing equipment are both mounted on the support frame.

[0028] The third material tank is disposed on the support, and the second material tank can be moved to be below the third material tank.

[0029] According to some embodiments of this application, the mixing system further includes a moving device, wherein the second material tank is disposed on the moving device, and the moving device is configured to move the second material tank.

[0030] According to some embodiments of this application, the mixing system further includes:

[0031] A first positioning structure is disposed in the third material tank;

[0032] A second positioning structure is disposed on the bracket, and the second positioning structure is adapted to the first positioning structure.

[0033] The weighing device of this application can automatically weigh rare earth powder and transport the weighed powder to a material tank, thereby improving the weighing efficiency and reducing safety hazards during production. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without exceeding the scope of protection claimed by this application.

[0035] Figure 1 This is a schematic diagram of the weighing device according to an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the intake pipe according to an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the mixing equipment according to an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the mixing system according to an embodiment of this application. Detailed Implementation

[0039] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] like Figure 1 As shown, an embodiment of this application provides a weighing device 100, which includes: a housing 1, a first air inlet pipe 2, a second air inlet pipe 3, a pressure relief pipe 4, an oxygen analyzer 5, a weighing device 6, a feed pipe 7, and a discharge pipe 8.

[0041] The housing 1 has a sealed cavity 11, and optionally, the housing 1 is a cuboid. A first air inlet pipe 2 connects to the cavity 11, and optionally, the first air inlet pipe 2 is located on one side of the housing 1. The first air inlet pipe 2 can deliver gas, which is an inert gas, into the cavity 11. A first control valve 21 is provided on the first air inlet pipe 2, and the first control valve 21 can control whether the first air inlet pipe 2 delivers gas into the cavity 11. The first control valve 21 is communicatively connected to a controller. An existing controller can be used.

[0042] The second air intake pipe 3 connects to the cavity 11. Optionally, the second air intake pipe 3 and the first air intake pipe 2 are located on the same side of the housing 1. The second air intake pipe 3 can also deliver inert gas into the cavity 11. A second control valve 31 is provided on the second air intake pipe 3, which can control whether the second air intake pipe 3 delivers gas into the cavity 11. The second control valve 31 is communicatively connected to the controller.

[0043] The pressure relief pipe 4 connects to the cavity 11, and a pressure relief valve 41 is installed on the pressure relief pipe 4. Optionally, the pressure relief pipe 4 and the first air inlet pipe 2 are located on opposite sides of the housing 1. When the gas pressure in the cavity 11 exceeds a first preset value, the pressure relief valve 41 opens to relieve pressure in the cavity 11.

[0044] Oxygen meter 5 is installed on the housing 1, and the probe of oxygen meter 5 is located in cavity 11. Oxygen meter 5 is used to detect the oxygen content in cavity 11.

[0045] When rare earth powder comes into contact with air, it will oxidize and may even explode. The first air inlet pipe 2 and the second air inlet pipe 3 are used to deliver inert gas into the cavity to reduce the oxygen content in the cavity 11.

[0046] When the oxygen content in cavity 11 exceeds the second preset value, the controller controls both the first control valve 21 and the second control valve 31 to open, venting the oxygen in cavity 11 at a high flow rate. When the oxygen content in cavity 11 decreases to the third preset value, the second control valve 31 is closed, and the first air inlet pipe 2 supplies air to cavity 11 at a low flow rate to protect the inert gas environment in cavity 11.

[0047] For example, when the oxygen content in cavity 11 is above 1000 ppm, the controller opens both the first control valve 21 and the second control valve 31, and the intake pressure of the first intake pipe 2 is 5 kPa, and the intake pressure of the second intake pipe 3 is 5 kPa. After the oxygen content in cavity 11 drops below 500 ppm, the second control valve 31 is closed, and the intake pressure of the first intake pipe 2 is 0.8 kPa.

[0048] Weighing device 6 is disposed in cavity 11 and is communicatively connected to controller. The bottom end of feed pipe 7 extends into cavity 11; for example, feed pipe 7 is located at the top of housing 1. Feed pipe 7 is connected to a first material tank containing material, for example, rare earth powder. Feed pipe 7 is used to convey the material in the first material tank to weighing device 6; for example, the material output from the first material tank is conveyed to weighing device 6 by gravity along feed pipe 7.

[0049] The top end of the discharge pipe 8 extends into the cavity 11, and the discharge pipe 8 is located at the bottom of the box 1. After the material on the weighing device 6 reaches the preset mass, the material feeding to the weighing device 6 stops. The weighing device 6 is configured to feed the material to the discharge pipe 8, and the material enters the second material tank along the discharge pipe 8.

[0050] Optionally, a feed valve is provided at the top of the feed pipe 7, and the feed valve is communicatively connected to the controller. After the material on the weighing device 6 reaches the preset mass, the weighing device 6 sends a signal to the controller, and the controller closes the feed valve according to the signal from the weighing device 6 to stop feeding material to the weighing device 6.

[0051] The weighing device 100 in this embodiment provides a safe environment for weighing rare earth powder and can automatically weigh the rare earth powder and transport the weighed powder to the material tank, thereby improving the weighing efficiency and reducing safety hazards during production.

[0052] In some embodiments, the weighing device 100 further includes a baffle plate 9, which is disposed at the bottom end of the feed pipe 7 to reduce splashing when material falls onto the weighing device 6 and reduce unnecessary material loss.

[0053] In some embodiments, the weighing device 6 includes an electronic scale 61 and a tipping bucket 62. The electronic scale 61 is disposed in the cavity 11 and is communicatively connected to a controller. The tipping bucket 62 is disposed on the electronic scale 61. Material falls into the tipping bucket 62 through the feed pipe 7. After the mass of the material in the tipping bucket 62 reaches a preset value, the electronic scale 61 sends a signal to the controller, which controls the feed valve to close according to the signal from the electronic scale 61. The tipping bucket 62 is driven by a motor to tilt, and the material in the tipping bucket 62 enters the discharge pipe 8 and then enters the second material tank along the discharge pipe 8.

[0054] like Figure 2 As shown, in some embodiments, both the portion of the first air intake pipe 2 located in the cavity 11 and the portion of the second air intake pipe 3 located in the cavity 11 are provided with multiple air intake holes. For example, both the first air intake pipe 2 and the second air intake pipe 3 extend from one side of the cavity 11 to the opposite side of the cavity 11. The first air intake pipe 2 is provided with multiple first air intake holes 22 arranged in sequence, and the second air intake pipe 3 is provided with multiple second air intake holes 32 arranged in sequence. Providing multiple air intake holes in both the first air intake pipe 2 and the second air intake pipe 3 is beneficial for improving the uniformity of oxygen content at different locations in the cavity 11.

[0055] like Figure 3 As shown, an embodiment of this application provides a mixing device 200, which includes: a weighing device 100 as described above, a first material tank 210, and a second material tank 220. The first material tank 210 is located above the weighing device 100 and is connected to a feed pipe 7, which transports the material in the first material tank 210 to the weighing device 6. The second material tank 220 is connected to a discharge pipe 8, and the material poured out of the weighing device 6 enters the second material tank 220 along the discharge pipe 8.

[0056] Optionally, the second material tank 220 contains neodymium iron boron powder, and the second material tank 220 is connected to the discharge pipe 8. The first material tank 210 contains rare earth powder. The rare earth powder in the first material tank 210 falls onto the weighing device 6 through the feed pipe 7. After the weighing device 6 weighs the preset value of rare earth powder, it pours the rare earth powder into the discharge pipe 8. The rare earth powder enters the second material tank 220 along the discharge pipe 8, completing the mixing.

[0057] In some embodiments, the mixing device 200 further includes a vibrator 230, which is connected to the first material tank 210 and the feed pipe 7. The vibrator 230 is communicatively connected to the controller and conveys the material output from the first material tank 210 to the feed pipe 7. After the weighing device 6 weighs a preset value of material, the controller controls the vibrator 230 to stop working, thereby stopping the feeding of material to the weighing device 6. The vibrator 230 can be an existing vibrator.

[0058] In some embodiments, the number of first material tanks 210, vibrators 230, feed pipes 7, and weighing devices 6 are all at least two. Each first material tank 210 corresponds to one vibrator 230, one feed pipe 7, and one weighing device 6 to weigh different rare earth powders. For example, there are two first material tanks 210, one containing dysprosium and the other containing terbium.

[0059] Optionally, the opening of the second material tank 220 is provided with a butterfly valve 240 to control the opening and closing of the second material tank 220.

[0060] like Figure 4 As shown, an embodiment of this application provides a mixing system 300, which includes the mixing device 200, support 310, and third material tank 320 as described above. Optionally, the support 310 is welded from square steel or I-beams.

[0061] The first material tank 210 and the weighing device 100 of the mixing equipment 200 are both mounted on the support 310, and the first material tank 210 is detachably connected to the support 310. There is space below the support 310 for the second material tank 220 to move.

[0062] The third material tank 320 is detachably mounted on the bracket 310 and is located above the second material tank 220. The second material tank 220 is movable between below the third material tank 320 and below the weighing device 100.

[0063] The third material tank 320 is a raw material tank used to hold NdFeB powder. The second material tank 220 is a mixing tank. After the second material tank 220 is moved below the third material tank 320, the second material tank 220 and the third material tank 320 are connected by a pipeline to transport a preset mass of NdFeB powder into the second material tank 220. The second material tank 220 is moved below the weighing device 100 and connected to the discharge pipe 8. The second material tank 220 receives rare earth powder transported by the weighing device 100 to mix the rare earth powder and NdFeB powder.

[0064] In some embodiments, the mixing system 300 further includes a moving device 330, on which the second material tank 220 is disposed. Optionally, the moving device 330 is a trolley. The moving device 330 is capable of moving the second material tank 220.

[0065] In some embodiments, the mixing system 300 further includes a first positioning structure and a second positioning structure (not shown in the figure). The first positioning structure is disposed on the third material tank 320, for example, the first positioning structure is a positioning post. The second positioning structure is disposed on the bracket 310, and the second positioning structure is adapted to the first positioning structure. For example, the second positioning structure is a positioning hole. When the third material tank 320 is placed on the bracket 310, the first positioning structure and the second positioning structure cooperate to position the third material tank 320, ensuring the repeatability accuracy of the third material tank 320.

[0066] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the technical solutions and core ideas of this application. Therefore, any changes or modifications made by those skilled in the art based on the ideas of this application, and on the specific implementation methods and application scope of this application, are all within the scope of protection of this application. In summary, the content of this specification should not be construed as a limitation of this application.

Claims

1. A weighing device, characterized in that, include: The box-shaped enclosure has a cavity. A first air intake pipe is connected to the cavity, and a first control valve is provided in the first air intake pipe; A second air intake pipe is connected to the cavity, and a second control valve is provided in the second air intake pipe; A pressure relief pipe is connected to the cavity, and the pressure relief pipe is equipped with a pressure relief valve; An oxygen analyzer is installed in the housing and is used to detect the oxygen content inside the cavity; A weighing device is disposed in the cavity; A feed pipe extends into the cavity at one end, and the feed pipe is used to convey materials to the weighing device. The discharge pipe extends into the cavity at one end, and the weighing device is configured to convey material to the discharge pipe.

2. The weighing device according to claim 1, characterized in that, It also includes a baffle plate, which is disposed at the end of the feed pipe.

3. The weighing device according to claim 1, characterized in that, The weighing device includes: An electronic scale is installed in the cavity; The tipping bucket is mounted on the electronic scale.

4. The weighing device according to claim 1, characterized in that, Both the portion of the first air intake pipe located in the cavity and the portion of the second air intake pipe located in the cavity are provided with multiple air intake holes.

5. A mixing device, characterized in that, include: The weighing device as described in any one of claims 1 to 4; The first material tank is connected to the feed pipe of the weighing device; The second material tank is connected to the discharge pipe of the weighing device.

6. The mixing equipment according to claim 5, characterized in that, It also includes a vibrator, which is connected to the first material tank and the feed pipe respectively.

7. The mixing equipment according to claim 6, characterized in that, The number of the first material tank, the vibrator, and the weighing device is at least two.

8. A mixing system, characterized in that, include: The mixing equipment as described in any one of claims 5 to 7; The first material tank and the weighing device of the mixing equipment are both mounted on the support frame. The third material tank is disposed on the support, and the second material tank can be moved to be below the third material tank.

9. The mixing system according to claim 8, characterized in that, It also includes a moving device, wherein the second material tank is disposed on the moving device, and the moving device is configured to move the second material tank.

10. The mixing system according to claim 8, characterized in that, Also includes: A first positioning structure is disposed in the third material tank; A second positioning structure is disposed on the bracket, and the second positioning structure is adapted to the first positioning structure.

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