Automatic overflow prevention device and control method

Abstract

The present invention belongs to the technical field of mixing equipment, and discloses an automatic anti-overflow device and a control method, wherein the automatic anti-overflow device comprises a mixing tank, a vacuum pump, a solenoid valve and a stirring paddle, wherein the vacuum pump is connected to the mixing tank, the solenoid valve is arranged between the mixing tank and the vacuum pump, the air inlet pipe of the solenoid valve is connected to the mixing tank, the air outlet pipe of the solenoid valve is connected to the vacuum pump, the stirring paddle comprises a rotating shaft arranged in the mixing tank and a paddle arranged on the rotating shaft, the rotating shaft is rotatably connected to the mixing tank, the driving motor is transmission-connected to the rotating shaft, the driving motor can drive the rotating shaft to rotate, the controller is electrically connected to the solenoid valve, and the controller can control the opening and closing of the solenoid valve. In the automatic anti-overflow device provided by the present invention, the controller intermittently controls the opening and closing of the solenoid valve in a timed and quantitative manner, ensures that the vacuum degree in the mixing tank is gradually increased, and effectively prevents the occurrence of overflow.

Description

Technical Field

[0001] The present invention relates to the technical field of mixing equipment, and in particular to an automatic overflow prevention device and a control method. Background Art

[0002] In the existing solid-sealed pole manufacturing field, the mixing methods include manual mixing, semi-automatic mixing and automatic mixing. Manual mixing is to manually vacuum and stir the epoxy resin mixture in the mixing tank and degas it. The semi-automatic method is a combination of mechanical and manual methods, and the automatic mixing method requires a very high degree of equipment automation.

[0003] In the actual production process, due to the continuous stirring of the epoxy resin mixture, bubbles will be generated in the epoxy resin mixture, causing the liquid level in the mixing tank to rise, which in turn causes overflow. In the prior art, a manual adjustment of the vent valve is used to ensure the appropriate height of the liquid level, but this method is highly dependent on personnel and the manual operation measurement standard is difficult to accurately grasp. Summary of the invention

[0004] An object of the present invention is to provide an automatic overflow prevention device which can effectively prevent the occurrence of overflow.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] An automatic overflow prevention device, comprising:

[0007] Mixing tank;

[0008] A vacuum pump, the vacuum pump is connected to the mixing tank;

[0009] The solenoid valve is arranged between the mixing tank and the vacuum pump, the air inlet pipe of the solenoid valve is connected with the mixing tank, and the air outlet pipe of the solenoid valve is connected with the vacuum pump;

[0010] A stirring paddle, the stirring paddle comprises a rotating shaft arranged in the mixing tank and a paddle arranged on the rotating shaft, and the rotating shaft is rotatably connected to the mixing tank;

[0011] A driving motor is connected to the rotating shaft and can drive the rotating shaft to rotate;

[0012] The controller is electrically connected to the solenoid valve, and the controller can control the opening and closing of the solenoid valve.

[0013] Optionally, the blades include first blades, and the first blades are arranged in multiple rows around the rotation axis, and the first blades in each adjacent row are staggered.

[0014] Optionally, first spoiler protrusions are arranged on both sides of each first blade, the first spoiler protrusions extend in the vertical direction of the rotation axis, and the first spoiler protrusions on both sides of each first blade are staggered, and the first spoiler protrusions opposite to each other in each column of adjacent first blades are staggered.

[0015] Optionally, a plurality of spoiler rods are arranged at intervals around the rotation axis in the mixing tank.

[0016] Optionally, the paddle further comprises:

[0017] The annular protrusion is arranged at the end of the rotating shaft facing away from the top of the mixing tank.

[0018] The second blade is arranged between the annular protrusion and the rotating shaft, and a plurality of second blades are arranged around the circumference of the rotating shaft, and the spoiler rod is placed in the annular protrusion.

[0019] Optionally, a second spoiler protrusion is provided on the side of the second paddle facing the top of the mixing tank.

[0020] Optionally, the second spoiler protrusion extends in the vertical direction of the rotation axis, third spoiler protrusions are arranged on opposite sides of the second spoiler protrusion, the third spoiler protrusion extends in the radial direction of the rotation axis, and the third spoiler protrusions on opposite sides of the second spoiler protrusion are staggered.

[0021] Optionally, an air inlet hole is provided on the top of the mixing tank, and an air inlet pipe of the solenoid valve is connected to the air inlet hole.

[0022] Another object of the present invention is to provide a control method using the above-mentioned automatic overflow prevention device, which can effectively prevent the occurrence of overflow.

[0023] To achieve this object, the present invention adopts the following technical solutions:

[0024] A control method comprises the following steps:

[0025] S100, start the drive motor and vacuum pump;

[0026] S200, after a delay of T1, the controller controls the solenoid valve to open;

[0027] S300, after the solenoid valve is opened for T2 time, the controller controls the solenoid valve to close;

[0028] S400, after the solenoid valve is closed for T3 time, the controller controls the solenoid valve to open;

[0029] S500, after repeating step S300 and step S400 N times in sequence, repeat step S300;

[0030] S600, after the solenoid valve is closed for T4 time, the controller controls the solenoid valve to be normally open;

[0031] Wherein, T1 is any value between 5 min and 10 min, T2 is any value between 0.5 min and 2 min, T3 is any value between 2 min and 5 min, T4 is any value between 1 min and 3 min, and N is any value between 9 and 24.

[0032] Optionally, the following steps are further included between step S100 and step S200:

[0033] S110, after the controller controls the solenoid valve to open for T5 time, the controller controls the solenoid valve to close;

[0034] Wherein, T5 is any value between 0.5min and 1min.

[0035] Beneficial effects:

[0036] The automatic overflow prevention device and control method provided by the present invention, when the driving motor and the vacuum pump are started, the driving motor drives the rotating shaft to rotate, driving the paddles to rotate to stir the mixed material, so that the mixed material is fully mixed, and the controller intermittently controls the opening and closing of the solenoid valve in a timely and quantitative manner to ensure that the vacuum degree in the mixing tank increases smoothly, avoiding a sharp increase in the vacuum degree in the mixing tank in a short period of time to cause the mixed material liquid level to rise, while assisting the degassing of the mixed material, effectively preventing the occurrence of overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the automatic overflow prevention device provided in the first embodiment of the present invention;

[0038] Figure 2 is a schematic structural diagram of the solenoid valve provided in the first embodiment of the present invention when it is closed;

[0039] Figure 3 is a schematic diagram of the structure of the solenoid valve provided in the first embodiment of the present invention when it is opened;

[0040] Figure 4 This is a schematic diagram of the structure of a mixing tank provided in Embodiment 1 of the present invention;

[0041] Figure 5 is a flow chart of a control method provided by Embodiment 2 of the present invention;

[0042] Figure 6 is the vacuum degree in the mixing tank during the mixing process under the control method provided in the second embodiment of the present invention;

[0043] Figure 7 It is the vacuum degree in the mixing tank under continuous vacuuming provided in the second embodiment of the present invention.

[0044] In the figure:

[0045] 100, mixing tank; 110, spoiler rod; 120, air inlet;

[0046] 200. Vacuum pump;

[0047] 300, solenoid valve; 310, valve body; 320, valve core; 330, valve; 340, air inlet pipe; 350, air outlet pipe;

[0048] 400, stirring paddle; 410, rotating shaft; 420, first paddle; 421, first spoiler protrusion; 430, annular protrusion; 440, second paddle; 441, second spoiler protrusion; 442, third spoiler protrusion;

[0049] 500. Drive motor; 600. Controller; 700. Contactor. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0054] Embodiment 1

[0055] Reference Figure 1 As shown, this embodiment provides an automated overflow prevention device, including a mixing tank 100, a vacuum pump 200, a solenoid valve 300 and a stirring paddle 400, the vacuum pump 200 is connected to the mixing tank 100, the solenoid valve 300 is arranged between the mixing tank 100 and the vacuum pump 200, the air inlet pipe 340 of the solenoid valve 300 is connected to the mixing tank 100, the air outlet pipe 350 of the solenoid valve 300 is connected to the vacuum pump 200, the stirring paddle 400 includes a rotating shaft 410 arranged in the mixing tank 100 and a paddle arranged on the rotating shaft 410, the rotating shaft 410 is rotatably connected to the mixing tank 100, the driving motor 500 is transmission-connected to the rotating shaft 410, the driving motor 500 can drive the rotating shaft 410 to rotate, the controller 600 is electrically connected to the solenoid valve 300, and the controller 600 can control the opening and closing of the solenoid valve 300.

[0056] In this embodiment, when the drive motor 500 and the vacuum pump 200 are started, the drive motor 500 drives the rotating shaft 410 to rotate, driving the paddles to rotate to stir the mixture so that the mixture is fully mixed, and the controller 600 controls the opening and closing of the solenoid valve 300 in a regular and quantitative intermittent manner to ensure that the vacuum degree in the mixing tank 100 increases smoothly, avoiding a sharp increase in the vacuum degree in the mixing tank 100 in a short period of time to cause the mixture liquid level to rise, while assisting the degassing of the mixture, effectively preventing the occurrence of overflow.

[0057] Furthermore, the controller 600 can be electrically connected to the driving motor 500, so that the automatic overflow prevention device can automatically control the start and stop of the driving motor 500 through the controller 600, thereby realizing automatic mixing of the automatic overflow prevention device.

[0058] Furthermore, the automatic overflow prevention device also includes a contactor 700, and the controller 600 and the vacuum pump 200 are both electrically connected to the contactor 700. The controller 600 can control the start and stop of the vacuum pump 200 by controlling the switch of the contactor 700. When the controller 600 controls the opening of the contactor 700 to control the vacuum pump 200 to start, the vacuum pump 200 extracts the gas in the mixing tank 100, thereby extracting the air in the mixture; the controller 600 controls the solenoid valve 300 to close, so that a certain vacuum environment is maintained in the mixing tank 100, and then adjusts the vacuum environment in the mixing tank 100, assists in degassing the mixture, and effectively prevents the occurrence of overflow. The controller 600 controls the start and stop of the vacuum pump 200 by controlling the switch of the contactor 700, which is a prior art and will not be described in detail here. Preferably, the controller 600 can be a PLC controller 600, or it can be other controllers 600, which will not be limited here.

[0059] Further, refer to Figures 2 to 3 As shown, the solenoid valve 300 includes a valve body 310, a solenoid coil and a valve core 320 disposed in the valve body 310, a valve 330 disposed on the valve core 320, and a spring disposed between the valve core 320 and the valve body 310. The valve body 310 is provided with an air inlet pipe 340 and an air outlet pipe 350. When the solenoid coil is not energized, the valve 330 blocks the air outlet pipe 350, thereby maintaining a certain vacuum environment in the mixing tank 100. When the controller 600 controls the solenoid valve 300 to When the electromagnetic coil is energized, the electromagnetic coil generates electromagnetic force, directly attracting the valve core 320, causing the valve core 320 to shift position, thereby causing the valve 330 to open the air outlet pipe 350, and the vacuum pump 200 extracts the gas in the mixing tank 100, thereby extracting the air in the mixed material; when the controller 600 controls the electromagnetic valve 300 to de-energize the electromagnetic coil, the valve core 320 is reset under the action of the spring force, and the valve 330 blocks the air outlet pipe 350, thereby maintaining a certain vacuum environment in the mixing tank 100. In this embodiment, the electromagnetic valve 300 is a prior art and will not be described in detail here.

[0060] Further, refer to Figure 4 As shown, an air inlet hole 120 is provided at the top of the mixing tank 100, and the air inlet pipe 340 of the solenoid valve 300 is connected to the air inlet hole 120. The air inlet hole 120 is arranged at the highest point of the mixing tank 100, which can more effectively prevent the occurrence of overflow and effectively prevent the overflowed mixed material from entering the solenoid valve 300 and the vacuum pump 200.

[0061] Furthermore, the rotating shaft 410 extends in the vertical direction of the mixing tank 100 , and one end of the rotating shaft 410 facing away from the bottom of the mixing tank 100 passes through the mixing tank 100 and is connected to the driving motor 500 .

[0062] In this embodiment, continue to refer to Figure 4 As shown, the paddles include first paddles 420, which are arranged in multiple rows around the rotating shaft 410. The first paddles 420 in each adjacent row are arranged in a staggered manner, so that the stirring paddle 400 disturbs the flow direction of the mixed material when stirring, which can effectively speed up the mixing speed, speed up the separation of gas in the mixed material, and make the mixed material uniform. Specifically, the first paddles 420 in each row are arranged at intervals along the axial direction of the rotating shaft 410.

[0063] Preferably, the first blades 420 can be arranged in two rows around the rotating shaft 410, which can not only avoid the rotating shaft 410 being subjected to a larger torque due to more rows of first blades 420, but also effectively increase the mixing speed, accelerate the separation of gas in the mixture, and effectively mix the mixture evenly.

[0064] Furthermore, first spoiler protrusions 421 are provided on both sides of each first blade 420, and the first spoiler protrusions 421 extend in the vertical direction of the rotating shaft 410, and the first spoiler protrusions 421 on both sides of each first blade 420 are arranged in a staggered manner, and the first spoiler protrusions 421 opposite to each adjacent first blade 420 in each row are arranged in a staggered manner. In this embodiment, the arrangement of the first spoiler protrusions 421 further disrupts the flow direction of the mixed material, so that the mixed material is fully mixed, thereby accelerating the mixing speed and accelerating the separation of the gas in the mixed material. In addition, the ends of the first spoiler protrusions 421 are all rounded to make it easier for the first spoiler protrusions 421 to clean the solidified mixed material.

[0065] Preferably, a first spoiler protrusion 421 can be set on both sides of the first blade 420, or multiple first spoiler protrusions 421 can be set. The design number of the first spoiler protrusions 421 is determined according to the size specifications of the first blade 420. While effectively accelerating the mixing speed, it will not excessively affect the torque of the rotating shaft 410. No further details will be given here.

[0066] Furthermore, a plurality of spoiler rods 110 are arranged at intervals around the rotation axis 410 in the mixing tank 100. The arrangement of the spoiler rods 110 can further disrupt the flow direction of the mixed material, so that the mixed material is fully mixed, thereby accelerating the mixing speed and accelerating the separation of the gas in the mixed material. Specifically, the spoiler rods 110 are parallel to the rotation axis 410 and are evenly arranged around the rotation axis 410. When the automatic overflow prevention device mixes materials, the stability of the mixing tank 100 can be effectively guaranteed.

[0067] In this embodiment, continue to refer to Figure 4As shown, the paddle also includes an annular protrusion 430 and a second paddle 440, the annular protrusion 430 is arranged at one end of the rotating shaft 410 facing away from the top of the mixing tank 100, the second paddle 440 is arranged between the annular protrusion 430 and the rotating shaft 410, and a plurality of second paddles 440 are arranged around the circumference of the rotating shaft 410, and the spoiler bar 110 is placed in the annular protrusion 430. Specifically, the rotating shaft 410 and the annular protrusion 430 are both fixedly connected to the second paddle 440, the annular protrusion 430 is coaxially arranged with the rotating shaft 410, and there is a small gap between the outer side of the spoiler bar 110 and the inner side of the annular protrusion 430, and the size of the gap is related to the length of the rotating shaft 410 and the diameter of the annular protrusion 430. When the automatic overflow prevention device is mixing, the annular protrusion 430 can effectively prevent the shaking of the rotating shaft 410, and will not affect the rotation of the rotating shaft 410, thereby increasing the stability of the automatic overflow prevention device.

[0068] Furthermore, the plurality of rows of first blades 420 are arranged in one-to-one correspondence with the second blades 440. Preferably, two second blades 440 are arranged around the rotating shaft 410, which can not only prevent the rotating shaft 410 from being subjected to a larger torque due to a larger number of second blades 440, but also effectively speed up the mixing speed, speed up the separation of gas in the mixed material, and effectively make the mixed material uniform.

[0069] Furthermore, a second spoiler protrusion 441 is provided on one side of the second blade 440 toward the top of the mixing tank 100. The second spoiler protrusion 441 further disrupts the flow direction of the mixed material, and can fully mix the mixed material from top to bottom in the mixing tank 100, speed up the mixing speed, speed up the separation of the gas in the mixed material, and further make the mixed material uniform. In addition, the ends of the second spoiler protrusion 441 are all rounded so that the second spoiler protrusion 441 is convenient for cleaning the solidified mixed material.

[0070] Preferably, a second spoiler protrusion 441 can be set on the second blade 440, or a plurality of second spoiler protrusions 441 can be set at radial intervals along the rotating shaft 410. The design number of the second spoiler protrusions 441 is determined according to the size specifications of the second blade 440. While effectively accelerating the mixing speed, it will not excessively affect the torque of the rotating shaft 410. No further details will be given here.

[0071] Further, the second spoiler protrusion 441 extends in the vertical direction of the rotating shaft 410, and the second spoiler protrusion 441 is provided with a third spoiler protrusion 442 on both sides opposite to each other. The third spoiler protrusion 442 extends in the radial direction of the rotating shaft 410 and the third spoiler protrusions 442 on both sides opposite to the second spoiler protrusion 441 are staggered, thereby more effectively disrupting the flow direction of the mixed material, making the mixed material more fully mixed, thereby accelerating the mixing speed and accelerating the separation of the gas in the mixed material. In addition, the ends of the third spoiler protrusion 442 are all rounded to make it easier for the third spoiler protrusion 442 to clean the solidified mixed material.

[0072] In this embodiment, in the automatic overflow prevention device, the coordinated use of the first paddle 420, the first spoiler protrusion 421, the second paddle 440, the second spoiler protrusion 441, the third spoiler protrusion 442 and the spoiler rod 110 can make the mixture in the mixing tank 100 more uniform, and accelerate the mixing speed and the separation speed of the gas in the mixture.

[0073] The automatic overflow prevention device provided in this embodiment can also be applied to mixing materials in the fields of gas, liquid, dust, etc. in addition to epoxy resin mixing, and is not specifically limited here.

[0074] Embodiment 2

[0075] This embodiment provides a control method that can use the automatic overflow prevention device in the first embodiment. Figure 5 As shown, the control method includes the following steps:

[0076] S100 , starting the driving motor 500 and the vacuum pump 200 .

[0077] Specifically, the automatic overflow prevention device automatically turns on the driving motor 500 through the controller 600 , and the controller 600 turns on the vacuum pump 200 by controlling the contactor 700 .

[0078] S200 , after a delay of T1 , the controller 600 controls the solenoid valve 300 to open, wherein T1 is any value between 5 min and 10 min.

[0079] The value of T1 depends on the amount of the mixture. Preferably, T1 is 6 min, 8 min or 10 min.

[0080] Specifically, in the initial stage of mixing, less air in the mixture overflows and fewer bubbles are formed. If the air in the mixing tank 100 is not extracted for a certain period of time, the liquid level in the mixing tank 100 will not rise too much and cause overflow. After a delay of T1, the controller 600 controls the solenoid valve 300 to open, and the vacuum pump 200 extracts the gas in the mixing tank 100, so that the air in the mixture is extracted, which will not cause overflow and assist in degassing the mixture.

[0081] S300 , after the solenoid valve 300 is opened for T2 time, the controller 600 controls the solenoid valve 300 to be closed, wherein T2 is any value between 0.5 min and 2 min.

[0082] The value of T2 depends on the amount of the mixture. Preferably, T2 is 0.8 min, 1 min, 1.2 min or 1.5 min.

[0083] Specifically, after the solenoid valve 300 is opened for T2 time, in order to avoid a sharp increase in the vacuum degree of the mixing tank 100 in a short period of time causing the mixed liquid level to rise, the controller 600 controls the solenoid valve 300 to close, so that a certain vacuum environment is maintained in the mixing tank 100, and then adjusts the vacuum environment in the mixing tank 100 to assist in degassing the mixed material and effectively prevent the occurrence of overflow.

[0084] S400 , after the solenoid valve 300 is closed for T3 time, the controller 600 controls the solenoid valve 300 to open, wherein T3 is any value between 2 min and 5 min.

[0085] The value of T3 depends on the amount of the mixture. Preferably, T3 is 2.5 min, 3 min, 3.5 min, 4 min or 4.5 min.

[0086] Specifically, when the solenoid valve 300 is closed, the gas in the mixture in the mixing tank 100 continuously overflows, thereby reducing the vacuum degree of the mixing tank 100. After the solenoid valve 300 is closed for T3 time, the controller 600 controls the solenoid valve 300 to open, and the vacuum pump 200 continues to extract the gas in the mixing tank 100, so that the air in the mixture is extracted, effectively avoiding the overflow caused by the excessive increase of the liquid level of the mixture.

[0087] S500, after repeating step S300 and step S400 N times in sequence, repeat step S300, wherein N is any value between 9 and 24.

[0088] The value of N depends on the amount of the mixture. Preferably, N is 11, 14 or 19.

[0089] Specifically, the controller 600 controls the opening and closing of the solenoid valve 300 in a regular and quantitative manner to ensure that the vacuum degree increases smoothly, avoid a sharp increase in the vacuum degree of the mixing tank 100 in a short period of time causing the mixed liquid level to rise, and ensure that the vacuum degree in the mixing tank 100 continues to increase at a stable rate when it reaches the range of -0.05MPa to -0.07MPa, while assisting in degassing the mixed material and effectively preventing the occurrence of overflow.

[0090] S600 , after the solenoid valve 300 is closed for T4 time, the controller 600 controls the solenoid valve 300 to be normally open, wherein T4 is any value between 1 min and 3 min.

[0091] The value of T4 depends on the amount of the mixture. Preferably, T4 is 1.5 min, 2 min, 2.5 min or 3 min.

[0092] Specifically, after repeatedly opening and closing the solenoid valve 300N+1 times, most of the gas in the mixed material in the mixing tank 100 has been discharged. After being normally closed for T4 time, the controller 600 controls the solenoid valve 300 to be normally open, so that the vacuum degree in the mixing tank 100 is maintained below 0.09 MPa, which assists in rapid degassing of the mixed material without overflowing.

[0093] Optionally, the following steps are further included between step S100 and step S200:

[0094] S110 , after the controller 600 controls the solenoid valve 300 to open for T5 time, the controller 600 controls the solenoid valve 300 to close, wherein T5 is any value between 0.5 min and 1 min.

[0095] The value of T5 depends on the amount of the mixture. Preferably, T5 is 0.5 min, 0.6 min, 0.8 min or 1 min.

[0096] Specifically, in the initial stage of mixing, reducing the air pressure of the mixing tank 100 can effectively accelerate the gas overflow in the mixed material, and because less air overflows from the mixed material, the mixed material can be quickly degassed without overflowing.

[0097] Reference Figure 6 to Figure 7 As shown, the control method makes the curvature of the vacuum degree change in the mixing tank 100 in the first 10 minutes obviously relatively slow, effectively solving the rapid increase of the liquid level caused by the increase of the vacuum degree in a short time. 0.07MPa is the overflow vacuum degree, and the overflow vacuum degree is reached at 15 minutes. Until 40 minutes, the change of the vacuum degree curve in the mixing tank 100 is relatively gentle, ensuring that overflow will not occur below the overflow vacuum degree.

[0098] In this embodiment, the entire mixing process is controlled by the controller 600, which reduces human interference, effectively prevents the occurrence of overflow, and effectively speeds up the mixing speed, speeds up the separation of gas in the mixture, and makes the mixture evenly mixed.

[0099] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic overflow prevention device, characterized in that: include: Mixing tank (100); A vacuum pump (200), the vacuum pump (200) being in communication with the mixing tank (100); a solenoid valve (300), the solenoid valve (300) being arranged between the mixing tank (100) and the vacuum pump (200), the air inlet pipe (340) of the solenoid valve (300) being in communication with the mixing tank (100), and the air outlet pipe (350) of the solenoid valve (300) being in communication with the vacuum pump (200); A stirring paddle (400), the stirring paddle (400) comprising a rotating shaft (410) disposed in the mixing tank (100) and a paddle disposed on the rotating shaft (410), the rotating shaft (410) being rotatably connected to the mixing tank (100); A driving motor (500), the driving motor (500) being in driving connection with the rotating shaft (410), and the driving motor (500) being capable of driving the rotating shaft (410) to rotate; A controller (600), the controller (600) being electrically connected to the solenoid valve (300), and the controller (600) being capable of controlling the opening and closing of the solenoid valve (300) in a regular and quantitative intermittent manner; When the solenoid valve (300) is not powered on, a vacuum environment can be maintained in the mixing tank (100); when the controller (600) controls the solenoid valve (300) to be powered on, the vacuum pump (200) extracts gas in the mixing tank (100), so that the gas in the mixed material can be extracted; when the controller (600) controls the solenoid valve (300) to be powered off, a vacuum environment can be maintained in the mixing tank (100).

2. The automatic overflow prevention device according to claim 1, characterized in that: The blades include first blades (420), and the first blades (420) are arranged in a plurality of rows around the rotating shaft (410), and the first blades (420) in each adjacent row are arranged in a staggered manner.

3. The automatic overflow prevention device according to claim 2, characterized in that: Each of the first blades (420) is provided with a first spoiler protrusion (421) on both sides, the first spoiler protrusion (421) extends along the vertical direction of the rotation axis (410), and the first spoiler protrusions (421) on both sides of each of the first blades (420) are staggered, and the first spoiler protrusions (421) opposite to each other in each column of adjacent first blades (420) are staggered.

4. The automatic overflow prevention device according to claim 2, characterized in that: A plurality of spoiler rods (110) are arranged in the mixing tank (100) at intervals around the rotating shaft (410).

5. The automatic overflow prevention device according to claim 4, characterized in that: The blade also includes: an annular protrusion (430), wherein the annular protrusion (430) is arranged at one end of the rotating shaft (410) facing away from the top of the mixing tank (100), A second blade (440), wherein the second blade (440) is disposed between the annular protrusion (430) and the rotating shaft (410), and a plurality of second blades (440) are disposed around the circumference of the rotating shaft (410), and the spoiler rod (110) is disposed in the annular protrusion (430).

6. The automatic overflow prevention device according to claim 5, characterized in that: A second spoiler protrusion (441) is provided on one side of the second blade (440) facing the top of the mixing tank (100).

7. The automatic overflow prevention device according to claim 6, characterized in that: The second spoiler protrusion (441) extends in the vertical direction of the rotation axis (410), and third spoiler protrusions (442) are arranged on opposite sides of the second spoiler protrusion (441). The third spoiler protrusions (442) extend in the radial direction of the rotation axis (410), and the third spoiler protrusions (442) on opposite sides of the second spoiler protrusion (441) are arranged alternately.

8. The automatic overflow prevention device according to claim 1, characterized in that: An air inlet hole (120) is provided on the top of the mixing tank (100), and an air inlet pipe (340) of the solenoid valve (300) is in communication with the air inlet hole (120).

9. A control method using the automatic overflow prevention device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S100, starting the driving motor (500) and the vacuum pump (200); S200, after a delay of T1, the controller (600) controls the solenoid valve (300) to open; S300, after the solenoid valve (300) is opened for T2 time, the controller (600) controls the solenoid valve (300) to be closed; S400, after the solenoid valve (300) is closed for T3 time, the controller (600) controls the solenoid valve (300) to open; S500, after repeating step S300 and step S400 N times in sequence, repeat step S300; S600: After the solenoid valve (300) is closed for T4 time, the controller (600) controls the solenoid valve (300) to be normally open; Wherein, T1 is any value between 5 min and 10 min, T2 is any value between 0.5 min and 2 min, T3 is any value between 2 min and 5 min, T4 is any value between 1 min and 3 min, and N is any value between 9 and 24.

10. The control method according to claim 9, characterized in that: The following steps are also included between step S100 and step S200: S110, after the controller (600) controls the solenoid valve (300) to open for a period of time T5, the controller (600) controls the solenoid valve (300) to close; Wherein, T5 is any value between 0.5min and 1min.

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