A powder mixing device with a water cooling system

Abstract

The present application relates to a powder mixing device with a water cooling system, belonging to the technical field of powder mixing. A powder mixing device with a water cooling system includes: a stirring tank and a stirring paddle, the stirring paddle is rotatably connected inside the stirring tank; two impact devices are arranged on the side wall of the stirring tank, and the two impact devices are symmetrical about the central axis of the stirring tank; each impact device includes an impact pipe, the impact pipe is communicated with the stirring tank and is used for flushing powder into the stirring tank; a discharge port for discharging materials is arranged on the stirring tank, and a seal for closing the discharge port is installed at the discharge port. The present application has the effect of reducing the stirring time.

Description

Technical Field

[0001] The technical field of the powder mixing of the present application, in particular, relates to a powder mixing device with a water cooling system. Background Art

[0002] During the production process of graphite powder, graphite powder with different carbon contents is often configured. In the finished product process of graphite powder, generally, graphite powder with different carbon contents is mixed to prepare graphite products that meet the carbon content standard. The mixing of graphite powder is usually carried out using a mixer, and finally, uniformly mixed graphite powder is obtained.

[0003] In the related art, a powder mixer mainly includes a housing. An inlet pipe is provided on the top surface of the housing. A stirring paddle is arranged inside the housing. A driving motor for driving the stirring paddle to rotate is arranged above the stirring paddle. A discharge pipe is fixedly connected to the lower end of the housing. During operation, the stirring paddle stirs the material. After the material is stirred evenly, the material can be discharged through the discharge pipe. The housing is a hollow housing, and an air inlet pipe is provided on the housing. During the stirring process, cold nitrogen gas is introduced into the housing to cool the housing.

[0004] In view of the above-mentioned related art, during stirring, it is necessary to first disperse various different specifications of carbon powders and then make them fully blend, so the stirring time is relatively long and the working efficiency is low. Summary of the Invention

[0005] The purpose of the present application is to provide a powder mixing device with a water cooling system that reduces the stirring time.

[0006] A powder mixing device with a water cooling system provided by the present application adopts the following technical solution: including: a stirring tank and a stirring paddle, and the stirring paddle is rotatably connected inside the stirring tank;

[0007] A counter-flushing device is arranged on the side wall of the stirring tank. There are two counter-flushing devices, and the two counter-flushing devices are symmetric about the central axis of the stirring tank;

[0008] The counter-flushing device includes a counter-flushing pipe, and the counter-flushing pipe is communicated with the stirring tank and is used for flushing powder into the stirring tank;

[0009] A discharge port for discharging materials is arranged on the stirring tank, and a sealing member for closing the discharge port is installed at the discharge port.

[0010] Each time the mixing tank is fed, usually multiple powders with different carbon contents are added at one time for mixing. However, when these powders are added to the mixing tank, they are each in a pile. When the mixing paddle stirs the powders, it first disperses all the piles of powders and then fuses the dispersed powders together. As a result, the mixing time is relatively long and the working efficiency is low. By adopting the above technical solution, when the powders enter the mixing tank, they are flushed into the mixing tank through the impact pipe, so that the two powders collide at the central position of the mixing tank, thus being dispersed and preliminarily mixed, thereby reducing the time for mixing the powders and increasing the working efficiency of the mixing tank.

[0011] Optionally, a first mixing blade is arranged in the impact pipe, and the first mixing blade is rotatably connected in the impact pipe;

[0012] A first feed pipe is arranged on the side wall of the impact pipe, and the first feed pipe is communicated with the impact pipe.

[0013] By adopting the above technical solution, before the powders enter the mixing tank, they are first dispersed by the first mixing blade and then flushed out through the impact pipe, so that the two dispersed powders collide at the central position of the mixing tank, further increasing the mixing degree of the two powders, thereby further reducing the time for mixing the powders and increasing the mixing efficiency of the mixing tank.

[0014] Optionally, the impact pipe includes an inner pipe and an outer sleeve, the outer sleeve is sleeved on the inner pipe, and a gap is left between the inner pipe and the outer sleeve;

[0015] The first feed pipe is communicated with the inner pipe, and the first mixing blade is rotatably connected in the inner pipe;

[0016] A second mixing blade is arranged between the inner pipe and the outer sleeve, and the second mixing blade is sleeved on the outer wall of the inner pipe and rotatably connected to the inner pipe;

[0017] A second feed pipe is arranged on the outer sleeve, and the second feed pipe is communicated with the outer sleeve.

[0018] There are two impact pipes, so only two powders with different carbon contents can be added at the same time each time, and thus the applicability is relatively low. By adopting the above technical solution, during feeding, materials can be fed into the inner pipe and the outer sleeve at the same time. Therefore, when mixing, four powders with different carbon contents can be fed at the same time, increasing the applicability of the equipment. Moreover, when the powders pass through the outer sleeve, they will be dispersed by the second mixing blade, further increasing the mixing efficiency of the equipment.

[0019] Optionally, the discharge port is located at the top of the mixing tank;

[0020] A through-flow port capable of ventilating into the mixing tank is arranged at the bottom end of the mixing tank.

[0021] Generally, when stirring powder materials, the powder materials usually sink to the bottom of the stirring tank. When the powder materials are at the bottom, during the stirring process, all rely on the stirring paddle to make the powder materials fuse with each other. The powder materials are at the bottom of the stirring tank and are not easily dispersed, resulting in a poor stirring effect and a long time. By adopting the above technical solution, the powder materials float above the stirring tank. During the stirring process of the powder materials, it will drive the air flow, and then drive the powder materials to flow, making the powder materials easier to be dispersed, thus reducing the stirring time of the powder materials and increasing the stirring efficiency of the stirring tank.

[0022] Optionally, a transmission blade is arranged in the through-flow port. The transmission blade is rotatably connected in the through-flow port, and the stirring paddle is fixedly connected to the rotating blade.

[0023] By adopting the above technical solution, the air flow blown into the stirring tank drives the stirring paddle to rotate, thereby stirring the powder materials, reducing the driving motor for driving the stirring paddle, reducing the driving parts, and thus reducing the cost. Moreover, when using a motor to drive the stirring paddle to rotate, powder materials are likely to enter the motor, resulting in the motor being unable to operate, and then the stirring paddle being unable to operate. However, when using the air flow to drive the stirring paddle to rotate, the possibility of the stirring paddle malfunctioning is reduced.

[0024] Optionally, the stirring tank includes an outer tank and an inner tank. The outer tank is sleeved on the inner tank, and there is a gap between the outer tank and the inner tank;

[0025] The through-flow port is arranged on the bottom surface of the outer tank and is communicated with the gap between the outer tank and the inner tank;

[0026] An up-flow port is arranged on the bottom surface of the inner tank, and the inner diameter of the up-flow port is smaller than the inner diameter of the through-flow port;

[0027] The air flow introduced into the through-flow port is a cooling air flow.

[0028] During the stirring process of the dust, friction will occur between the dust and the inner wall of the inner tank, generating a large amount of heat. Moreover, the friction between the powder materials will also cause heat generation. By adopting the above technical solution, it will cause the powder materials and the inner tank to overheat. The air flow introduced into the inner tank is a cooling air flow. The cooling air flow flows into the gap between the inner tank and the outer tank to cool the inner tank and the outer tank; the cooling air flow enters the inner tank to cool the powder materials, thus reducing the occurrence of overheating of the powder materials and the stirring tank.

[0029] Optionally, a plurality of air wall holes are provided on the side wall of the inner tank, and the air wall holes are communicated with the gap between the outer tank and the inner tank.

[0030] By adopting the above technical solution, during the stirring process, the cooling air flow enters the gap between the inner tank and the outer tank, and then sprays out from the air wall holes into the inner tank. When the powder material approaches the inner wall of the inner tank, it is blown away by the air flow in the air wall holes, thereby reducing the friction between the powder material and the inner wall of the inner tank, thus reducing the heat generated by the friction between the powder material and the inner wall of the inner tank, and further reducing the occurrence of overheating of the powder material and the stirring tank.

[0031] Optionally, a guiding inclined surface is provided on the inner top surface of the inner tank, and the guiding inclined surface abuts against the inner wall of the discharge port.

[0032] By adopting the above technical solution, during the discharging process, the powder material floats upward and moves towards the discharge port under the action of the guiding inclined surface, and thus flows out from the discharge port. Furthermore, the possibility of dust accumulation in the corners of the inner tank is reduced.

[0033] Optionally, a pressure relief port is provided on the side wall of the stirring tank, and a pressure relief valve for closing the pressure relief port is installed at the pressure relief port.

[0034] During the process of continuously introducing cooling gas into the stirring tank, the air pressure in the stirring tank gradually increases, and thus the pressure received by the electromagnetic valve gradually increases, which affects the opening of the electromagnetic valve. By adopting the above technical solution, when the pressure is too high, the pressure relief valve releases gas, thereby reducing the pressure in the stirring tank, and further reducing the pressure on the electromagnetic valve.

[0035] Optionally, a filter screen is provided at the pressure relief port, and the filter screen is installed on the inner wall of the pressure relief port.

[0036] During the pressure relief process, the powder material is likely to flow out from the pressure relief valve, resulting in powder material loss. By adopting the above technical solution, during the pressure relief process, the filter screen filters the powder material, and thus reduces the powder material flowing out from the pressure relief valve, reducing the waste of the powder material.

[0037] In summary, the present application includes at least one of the following beneficial technical effects:

[0038] 1. When the powder material enters the stirring tank, it is flushed into the stirring tank through the impact pipe, and then the two powder materials collide at the central position of the stirring tank, so as to be scattered and preliminarily mixed, thereby reducing the time for stirring the powder material, and thus increasing the working efficiency of the stirring tank;

[0039] 2. Before the powder material enters the stirring tank, it is first dispersed by the first stirring blade, and then through the impact pipe, the dispersed powder material is flushed out, so that the two dispersed powder materials collide at the central position of the stirring tank, further increasing the mixing degree of the two powder materials, and thus further reducing the time for stirring the powder material, and further increasing the stirring efficiency of the stirring tank;

[0040] 3. Furthermore, it causes the powder material and the inner tank to overheat. The airflow introduced into the inner tank is a cooling airflow. The cooling airflow flows into the gap between the inner tank and the outer tank to cool the inner tank and the outer tank. The cooling airflow enters the inner tank to cool the powder material, thereby reducing the occurrence of overheating of the powder material and the mixing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic diagram of the overall structure of a powder mixing device with a water cooling system according to an embodiment of the present application.

[0042] Figure 2 is a schematic cross-sectional structure diagram of a powder mixing device with a water cooling system according to an embodiment of the present application.

[0043] Figure 3 is a partial view for showing the structure of the impact device according to an embodiment of the present application.

[0044] In the figure, 1, mixing tank; 11, inner tank; 111, upflow port; 112, guiding inclined surface; 113, air wall hole; 12, outer tank; 121, through-flow port; 1211, first mounting bracket; 122, transmission blade; 123, ventilation pipe; 13, stirring paddle; 14, bracket; 15, discharge port; 151, discharge pipe; 152, seal; 16, pressure relief port; 161, pressure relief pipe; 1611, filter screen; 162, pressure relief valve;

[0045] 2, impact device; 21, impact pipe; 211, inner pipe; 2111, second mounting bracket; 2112, first stirring blade; 2113, first feed pipe; 212, outer sleeve; 2121, second stirring blade; 2122, second feed pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The following Figure 1 - Figure 3 is a further detailed description of the present application in conjunction with the

[0047] A powder mixing device with a water cooling system, referring to Figure 1 and Figure 2, including a stirring tank 1, a stirring paddle 13 and a bracket 14, the bracket 14 is placed on the ground, the stirring tank 1 is installed on the top surface of the bracket 14, the stirring tank 1 includes an outer tank 12 and an inner tank 11, the inner tank 11 is arranged inside the outer tank 12, and a gap is left between the inner tank 11 and the outer tank 12. The side wall of the outer tank 12 is provided with a hedging device 2, and two hedging devices 2 are provided, and the two hedging devices 2 are symmetrically arranged about the central axis of the stirring tank 1. The bottom surface of the inner tank 11 is provided with an upflow port 111, and the bottom surface of the outer tank 12 is provided with a flow port 121. The central axes of the flow port 121 and the upflow port 111 coincide, and the inner diameter of the flow port 121 is larger than the inner diameter of the upflow port 111. The top wall of the stirring tank 1 is provided with a discharge port 15, and the discharge port 15 is connected to a discharge pipe 151, and a sealing member 152 is installed on the discharge pipe 151. In this embodiment, the sealing member 152 adopts a solenoid valve.

[0048] Reference Figure 2 The inner top wall of the inner tank 11 is provided with a guide slope 112, one side of the guide slope 112 abuts against the inner wall of the discharge port 15, and the other side of the guide slope 112 abuts against the inner wall of the inner tank 11. A plurality of wind wall holes 113 are provided on the inner wall of the inner tank 11, and the wind wall holes 113 are connected to the gap between the outer tank 12 and the inner tank 11.

[0049] A transmission blade 122 is provided in the flow port 121. A first mounting frame 1211 is provided in the flow port 121. The first mounting frame 1211 is fixedly connected to the inner wall of the flow port 121. The transmission blade 122 is rotatably connected to the first mounting frame 1211. The stirring paddle 13 is fixedly connected to the top surface of the transmission blade 122. A vent pipe 123 is connected to the flow port 121. The vent pipe 123 introduces a cooling airflow into the stirring tank 1. In this embodiment, the cooling airflow uses low-temperature nitrogen.

[0050] A pressure relief port 16 is provided on the side wall of the mixing tank 1. The pressure relief port 16 runs through the outer tank 12 and the inner tank 11, and the pressure relief port 16 is located at the lower end of the mixing tank 1. A pressure relief pipe 161 is provided on the side wall of the mixing tank 1. The pressure relief pipe 161 is inserted into the pressure relief port 16, and the pressure relief pipe 161 is adapted to the pressure relief port 16. A filter screen 1611 is provided at one end of the pressure relief pipe 161 close to the pressure relief port 16. The filter screen 1611 is provided in the pressure relief pipe 161 and is fixedly connected to the inner wall of the pressure relief pipe 161. A pressure relief valve 162 is fixedly installed at one end of the pressure relief pipe 161 away from the pressure relief port 16.

[0051] When it is necessary to stir graphite powder with different carbon contents, first continuously introduce low-temperature nitrogen into the stirring tank 1 through the air supply pipe 123, and then flush the powder into the inner tank 11 through the flushing device 2. Two symmetrically arranged flushing devices 2 flush the powder at the same time, causing the powders with different carbon contents to collide with each other at the central position of the inner tank 11, so as to preliminarily mix the powders with different carbon contents at the central position of the inner tank 11. Then, the low-temperature nitrogen flowing into the inner tank 11 through the upflow port 111 causes several powders to float above the inner tank 11, and the stirring paddle 13 performs secondary stirring on the powders. When the powder stirring is completed, the seal 152 is opened, and the air supply volume of the air supply pipe 123 is increased, so that the powder moves towards the discharge port 15 under the guiding action of the guiding inclined surface 112. When it reaches the position of the discharge port 15, the powder is then transported out through the discharge pipe 151.

[0052] During the process of continuously supplying gas to the stirring tank 1, the pressure inside the inner tank 11 continuously increases. When the pressure increases to a certain value, the pressure relief valve 162 automatically opens, enabling the low-temperature nitrogen inside the inner tank 11 to be discharged through the pressure relief valve 162, thereby reducing the pressure inside the inner tank 11. Since the pressure relief port 16 is located at the lower end of the stirring tank 1, and the powder is stirred at the upper end of the stirring tank 1, during the pressure relief process, the powder flowing out from the pressure relief valve 162 is reduced. Moreover, a filter screen 1611 is provided inside the pressure relief pipe 161, further reducing the situation of powder flowing out from the pressure relief valve 162.

[0053] During the process of continuously introducing low-temperature nitrogen, the low-temperature nitrogen in the gap between the inner tank 11 and the outer tank 12 flows into the inner tank 11 through the air wall hole 113, forming an air wall at the inner wall of the inner tank 11, reducing the friction between the powder and the inner wall of the inner tank 11, and further reducing the heat generated by the friction between the powder and the inner tank 11, thus playing a role in cooling.

[0054] Refer to Figure 2 and Figure 3 As shown in

[0055] Refer to Figure 2 and Figure 3, a second stirring blade 2121 is sleeved on the outer wall of the inner tube 211, and the second stirring blade 2121 is rotatably connected to the inner tube 211 through a bearing. The central axis of the second stirring blade 2121 coincides with the central axis of the inner tube 211. A second feed pipe 2122 is arranged on the outer sleeve 212, and the second feed pipe 2122 communicates with the outer sleeve 212. The length of the inner tube 211 inserted into the inner tank 11 is less than the length of the outer sleeve 212 inserted into the inner tank 11.

[0056] Through the first feed pipe 2113 and the second feed pipe 2122, powders are simultaneously fed into the inner tube 211 and the outer sleeve 212. The carbon content of the powder fed into the inner tube 211 is different from that of the powder fed into the outer sleeve 212. The carbon content of the powders fed into the two inner tubes 211 is also different, and the carbon content of the powders fed into the two outer sleeves 212 is also different. The two counter-jet devices 2 can feed four kinds of powders with different carbon contents at one time.

[0057] When feeding the powders, low-temperature nitrogen gas is continuously fed into the outer sleeve 212 and the inner tube 211. The low-temperature nitrogen gas drives the powders to move into the inner tank 11, and at the same time, the low-temperature nitrogen gas blows the first stirring blade 2112 and the second stirring blade 2121 to rotate, so that the powders are dispersed at the first stirring blade 2112 and the second stirring blade 2121, and the low-temperature nitrogen gas continues to drive the two kinds of powders with different carbon contents to move into the inner tank 11.

[0058] The length of the inner tube 211 inserted into the inner tank 11 is less than the length of the outer sleeve 212 inserted into the inner tank 11. Therefore, the two kinds of powders with different carbon contents will meet initially in the outer sleeve 212, and thus are initially mixed. The low-temperature nitrogen gas drives the initially mixed powders to move into the inner tank 11. Then, at the central position of the inner tank 11, the two kinds of initially mixed powders collide with each other for the second mixing, that is, the four kinds of powders with different carbon contents are mixed. Then, under the drive of the stirring paddle 13, the four kinds of powders with different carbon contents are mixed for the third time, thereby reducing the mixing time required.

[0059] The implementation principle of the embodiment of the present application is as follows: Before feeding the powders, low-temperature nitrogen gas is continuously fed into the ventilation pipe 123, the outer sleeve 212 and the inner tube 211. At this time, under the blowing of the low-temperature nitrogen gas, the transmission blade 122, the first stirring blade 2112 and the second stirring blade 2121 are driven to rotate. The transmission blade 122 rotates, and then drives the stirring paddle 13 to rotate.

[0060] Then, through the first feed pipe 2113 and the second feed pipe 2122, powders with different carbon contents are respectively added into the inner tube 211 and the outer sleeve 212. The two kinds of powders are driven by the low-temperature nitrogen gas to move into the inner tank 11. The powder in the outer sleeve 212 is dispersed by the second stirring blade 2121 when passing through the second stirring blade 2121; the powder in the inner tube 211 is dispersed by the first stirring blade 2112 when passing through the first stirring blade 2112.

[0061] The low-temperature nitrogen gas continues to drive the powder material to move inward into the inner tank 11. The two powder materials with different carbon contents meet and are preliminarily mixed inside the outer sleeve 212, and then are driven by the low-temperature nitrogen gas to move towards the center of the inner tank 11. Finally, the four powder materials with different carbon contents collide at the center position of the inner tank 11, and then a second mixing is carried out. Then, the low-temperature nitrogen gas entering through the upflow port 111 drives the four powder materials to rise, and then the four powder materials are stirred by the stirring paddle 13 at the upper end of the inner tank 11.

[0062] After the stirring is completed, the solenoid valve is opened to increase the flow rate of the low-temperature nitrogen gas in the air supply pipe 123, so that the mixed powder material enters the discharge pipe 151 through the discharge port 15, thereby collecting the powder material.

[0063] During the continuous introduction of the low-temperature nitrogen gas, the low-temperature nitrogen gas in the gap between the inner tank 11 and the outer tank 12 flows into the inner tank 11 through the air wall holes 113, forming an air wall at the inner wall of the inner tank 11, reducing the friction between the powder material and the inner wall of the inner tank 11, and further reducing the heat generated by the friction between the powder material and the inner tank 11, thereby playing a role in cooling. Moreover, the low-temperature nitrogen gas continuously cools the inner tank 11, the outer tank 12 and the powder material, reducing the occurrence of overheating of the powder material and the stirring tank 1.

[0064] The embodiments of the present specific implementation manner are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A powder mixing device with a water cooling system, comprising: Stirring tank (1) and stirring paddle (13), characterized in that: the stirring paddle (13) is rotatably connected inside the stirring tank (1); A counter-flushing device (2) is provided on the side wall of the stirring tank (1), and there are two counter-flushing devices (2), and the two counter-flushing devices (2) are symmetrical about the central axis of the stirring tank (1); The counter-flushing device (2) includes a counter-flushing pipe (21), and the counter-flushing pipe (21) is communicated with the stirring tank (1) and is used for flushing powder into the stirring tank (1); An outlet (15) for discharging materials is provided on the stirring tank (1), and a seal (152) for closing the outlet (15) is installed at the outlet (15); The outlet (15) is located at the top end of the stirring tank (1); A through-flow port (121) capable of ventilating into the stirring tank (1) is provided at the bottom end of the stirring tank (1); A transmission blade (122) is provided in the through-flow port (121), the transmission blade (122) is rotatably connected in the through-flow port (121), and the stirring paddle (13) is fixedly connected to the transmission blade (122); The stirring tank (1) includes an outer tank (12) and an inner tank (11), the outer tank (12) is sleeved on the inner tank (11), and a gap is left between the outer tank (12) and the inner tank (11); The through-flow port (121) is provided on the bottom surface of the outer tank (12) and is communicated with the gap between the outer tank (12) and the inner tank (11); An up-flow port (111) is provided on the bottom surface of the inner tank (11), and the inner diameter of the up-flow port (111) is smaller than the inner diameter of the through-flow port (121); The air flow introduced into the through-flow port (121) is a cooling air flow; A plurality of air wall holes (113) are opened on the side wall of the inner tank (11), and the air wall holes (113) are communicated with the gap between the outer tank (12) and the inner tank (11).

2. The powder mixing device with a water cooling system according to claim 1, characterized in that: A first stirring blade (2112) is provided in the counter-flushing pipe (21), and the first stirring blade (2112) is rotatably connected in the counter-flushing pipe (21); A first feed pipe (2113) is provided on the side wall of the counter-flushing pipe (21), and the first feed pipe (2113) is communicated with the counter-flushing pipe (21).

3. The powder mixing device with a water cooling system according to claim 2, characterized in that: The counter-flushing pipe (21) includes an inner pipe (211) and an outer sleeve (212), the outer sleeve (212) is sleeved on the inner pipe (211), and a gap is left between the inner pipe (211) and the outer sleeve (212); The first feed pipe (2113) is communicated with the inner pipe (211), and the first stirring blade (2112) is rotatably connected in the inner pipe (211); A second stirring blade (2121) is provided between the inner pipe (211) and the outer sleeve (212), the second stirring blade (2121) is sleeved on the outer wall of the inner pipe (211) and is rotatably connected to the inner pipe (211); A second feed pipe (2122) is provided on the outer sleeve (212), and the second feed pipe (2122) is communicated with the outer sleeve (212).

4. A powder mixing device with a water cooling system according to claim 1, characterized in that: The inner top surface of the inner tank (11) is provided with a guiding inclined surface (112), and the guiding inclined surface (112) abuts against the inner wall of the discharge port (15).

5. The powder mixing device with a water cooling system according to claim 1, characterized in that: A pressure relief port (16) is formed in the side wall of the mixing tank (1), and a pressure relief valve (162) for closing the pressure relief port (16) is installed at the pressure relief port (16).

6. The powder mixing device with a water cooling system according to claim 5, characterized in that: A filter screen (1611) is arranged at the pressure relief port (16), and the filter screen (1611) is installed on the inner wall of the pressure relief port (16).

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