Low-speed stirring cylinder convenient for discharging

Abstract

The utility model belongs to the technical field of stirring cylinders, and particularly relates to a low-speed stirring cylinder convenient for discharging, which comprises a tank body, a stirring motor arranged at the top of the tank body, a feed port and a discharge port arranged at the bottom of the tank body, a stirring shaft capable of extending into the tank body is arranged at one end of the stirring motor, and a plurality of stirring paddles are arranged on the stirring shaft. And a discharge valve is also arranged at the bottom of the tank body. According to the utility model, the mounting mode of a driving part with a certain length, such as an air cylinder, is changed into inclined mounting, so that compared with the original mode of directly and vertically mounting the driving part below the discharge port of the tank body, not only is the requirement on mounting space reduced, but also the probability that high-viscosity compounds in the tank enter an assembly gap between the valve rod and the valve seat is reduced, and the production efficiency is improved. And the service life of the emptying valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mixing cylinder technology, specifically a low-speed mixing cylinder that facilitates material discharge. Background Technology

[0002] Low-speed mixing tanks (also known as low-speed agitators) are mainly used for mixing and dispersing high-viscosity materials. They achieve thorough mixing of materials through low-speed agitation paddles and are equipped with variable frequency speed control to adapt to different process requirements. They are widely used in the mixing, dissolving, and polymerization reactions of materials such as petroleum, fertilizers, and synthetic rubber.

[0003] However, the discharge port of the current low-speed mixing tank is generally equipped with a bottom-discharge valve, which can avoid sedimentation when high-viscosity compounds are discharged. It is mainly divided into manual type and pneumatic type.

[0004] In automated applications, pneumatic bottom-discharge valves are the preferred choice. However, these valves all have a drawback: regardless of whether they are powered by a cylinder or a motor, they require a large space under the mixing tank to complete the assembly. For example, existing patents such as CN205173500U, CN208185477U, CN208090048U, CN213575564U, and CN210949881U are all pneumatic bottom-discharge valves, but they all require sufficient space under the tank for the installation of the drive components.

[0005] Therefore, this application proposes a low-speed mixing tank that reduces the installation space requirements below the tank and facilitates material discharge. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-speed mixing tank for easy material discharge, comprising a tank body, a mixing motor located at the top of the tank body, a feed inlet, and a discharge outlet located at the bottom of the tank body. One end of the mixing motor is provided with a mixing shaft that can extend into the tank body. The mixing shaft is equipped with several mixing blades. The bottom of the tank body is also provided with a discharge valve, which includes:

[0007] The valve seat includes a vertical part and an inclined part that are interconnected, the vertical part being connected to the bottom of the tank and communicating with the discharge port;

[0008] A flange is provided at the outlet end of the inclined section, and the flange is used to connect to an external discharge pipe;

[0009] The valve core includes a valve stem and a piston disposed at the end of the valve stem, the valve stem being slidably connected to the vertical part, and the axis of the valve stem being aligned with the center line of the inclined part;

[0010] A drive unit is used to drive the valve stem to slide. The drive unit includes a cylinder and is fixedly connected to the outer surface of the valve seat.

[0011] Preferably, the angle between the inclined portion and the vertical portion is 90-180°.

[0012] Preferably, the tilt angle of the inclined portion is 125-145°.

[0013] Preferably, the valve stem is slidably connected to the side wall of the vertical part via a sealing gasket.

[0014] Preferably, the stirring shaft can extend into the inclined portion, and the bottom axial surface of the stirring shaft is provided with a spiral blade, and when the stirring tank is in the stirring state, the rotation direction of the spiral blade is opposite to the rotation direction of the stirring shaft.

[0015] Preferably, the upper part of the spiral blade is located inside the tank.

[0016] Preferably, a scraper is also provided on the lower surface of the stirring shaft, and the end of the scraper away from the stirring shaft is inclined downward and in contact with the bottom surface of the tank.

[0017] Preferably, the scraper is twisted, and when the mixing tank is in the mixing state, the twisting direction of the scraper is opposite to the rotation direction of the mixing shaft.

[0018] Compared with the prior art, this utility model provides a low-speed mixing cylinder that facilitates material discharge, and has the following beneficial effects:

[0019] This low-speed mixing cylinder, which facilitates material discharge, changes the installation method of the cylinder, a drive unit with a certain length, to an inclined installation. Compared with the original method of directly and vertically installing it below the discharge port of the tank, it not only reduces the requirements for installation space, but also reduces the probability of high-viscosity compounds entering the valve stem and valve seat assembly gap, thus extending the service life of the discharge valve. Attached Figure Description

[0020] Figure 1 This is a front view of the structure of a low-speed mixing cylinder that facilitates material discharge.

[0021] Figure 2 This is a three-dimensional structural diagram of the stirring shaft in a low-speed stirring tank that facilitates material discharge.

[0022] Figure 3 for Figure 2 The left view;

[0023] Figure 4 This is a schematic diagram of the structure of an existing low-speed mixing tank;

[0024] Figure 5 for Figure 4 Top view.

[0025] In the picture:

[0026] 1. Tank body; 11. Inlet; 12. Outlet;

[0027] 2. Stirring motor; 21. Stirring shaft; 22. Stirring paddle; 23. Spiral blade; 24. Scraper;

[0028] 3. Discharge valve; 31. Valve seat; 311. Vertical part; 312. Inclined part; 32. Flange; 33. Valve core; 331. Valve stem; 332. Piston; 34. Drive part; 341. Cylinder. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1:

[0031] Please see Figure 1 and Figure 4-5 This utility model provides the following technical solution: a low-speed mixing tank for easy discharge, comprising a tank body 1, a mixing motor 2 disposed at the top of the tank body 1, a feed inlet 11, and a discharge outlet 12 disposed at the bottom of the tank body 1. One end of the mixing motor 2 is provided with a mixing shaft 21 that can extend into the tank body 1, and the mixing shaft 21 is provided with a plurality of mixing blades 22. The bottom of the tank body 1 is also provided with a discharge valve 3, which includes:

[0032] The valve seat 31 includes a vertical part 311 and an inclined part 312 that are connected to each other. The angle between the inclined part 312 and the vertical part 311 is 90-180°. The vertical part 311 is connected to the bottom of the tank body 1 and communicates with the discharge port 12.

[0033] Flange 32 is located at the outlet end of the inclined section 312 and is used to connect to an external discharge pipe;

[0034] The valve core 33 includes a valve stem 331 and a piston 332 disposed at the end of the valve stem 331. The valve stem 331 is slidably connected to the side wall of the vertical part 311 through a sealing gasket, and the axis of the valve stem 331 is aligned with the center line of the inclined part 312.

[0035] The drive unit 34 is used to drive the valve stem 331 to slide. The drive unit 34 includes a cylinder 341 and is fixedly connected to the outer surface of the valve seat 31.

[0036] As one possible implementation of this utility model, the raw material enters the tank 1 through the feed inlet 11. There can be multiple feed inlets 11, and this technical solution does not limit the number of inlets. During operation, the stirring motor 2 drives the stirring shaft 21 to rotate, which in turn drives the stirring paddle 22 to stir the high-viscosity compound inside the tank 1. When stirring is completed, the drive unit 34 operates, thereby causing the valve rod 331 to retract and the piston 332 to move out of the inclined section. Therefore, the tank 1 is connected to the external discharge pipe to realize material discharge.

[0037] During the discharge process, compared to the existing method where the valve stem 331 is directly slidably mounted on the inclined part 312, the valve stem 331 in this technical solution is slidably mounted on the vertical part 311, completing the sealing and opening of the inclined part 312 from top to bottom. Therefore, during the discharge of high-viscosity compounds, it is less likely for them to seep into the assembly gap between the valve stem 331 and the valve seat 31, and it is also less likely to cause adhesion of the sealing gasket in the assembly gap, leading to a loss of accuracy in the subsequent valve opening and closing function. At the same time, this design changes the installation of the drive unit 34 from being directly vertically mounted below the discharge port 12 of the tank 1 to being inclinedly mounted on the discharge port 12 of the tank 1, significantly reducing the installation space requirements below the tank 1. For maintenance personnel, there is no need to look up or use a ladder for disassembly and assembly operations, and there is also more installation space when other equipment needs to be installed below the tank 1.

[0038] By adopting this implementation method, the installation method of the drive unit 34, which has a certain length, such as the cylinder 341, is changed to an inclined installation. Compared with the original method of directly and vertically installing it below the discharge port 12 of the tank body 1, it not only reduces the requirements for installation space, but also reduces the probability of high viscosity compounds in the tank entering the assembly gap between the valve stem 331 and the valve seat 31, thus extending the service life of the discharge valve.

[0039] Preferably, the tilt angle of the inclined portion 312 is 125-145°. Since the tank body 1 is also divided into V-shaped and U-shaped, if the tank body 1 is U-shaped, then when a longer cylinder 341 is used, the tilt angle can be made gentler, that is, less than 135 degrees; when the tank body 1 is V-shaped, the included angle can also be greater than 135 degrees.

[0040] Example 2:

[0041] Please see Figure 1-4 This utility model provides the following technical solution: a low-speed mixing tank for easy discharge, comprising a tank body 1, a mixing motor 2 disposed at the top of the tank body 1, a feed inlet 11, and a discharge outlet 12 disposed at the bottom of the tank body 1. One end of the mixing motor 2 is provided with a mixing shaft 21 that can extend into the tank body 1, and the mixing shaft 21 is provided with a plurality of mixing blades 22. The bottom of the tank body 1 is also provided with a discharge valve 3, which includes:

[0042] The valve seat 31 includes a vertical part 311 and an inclined part 312 that are connected to each other. The angle between the inclined part 312 and the vertical part 311 is 90-180°. The vertical part 311 is connected to the bottom of the tank body 1 and communicates with the discharge port 12.

[0043] Flange 32 is located at the outlet end of the inclined section 312 and is used to connect to an external discharge pipe;

[0044] The valve core 33 includes a valve stem 331 and a piston 332 disposed at the end of the valve stem 331. The valve stem 331 is slidably connected to the side wall of the vertical part 311 through a sealing gasket, and the axis of the valve stem 331 is aligned with the center line of the inclined part 312.

[0045] The drive unit 34 is used to drive the valve stem 331 to slide. The drive unit 34 includes a cylinder 341 and is fixedly connected to the outer surface of the valve seat 31.

[0046] The stirring shaft 21 can extend into the inclined part 312, and the bottom axial surface of the stirring shaft 21 is provided with a spiral blade 23. When the stirring tank is in the stirring state, the rotation direction of the spiral blade 23 is opposite to the rotation direction of the stirring shaft 21, and the upper part of the spiral blade 23 is located inside the tank 1.

[0047] As an optional implementation of this utility model, based on Embodiment 1, since the vertical part 311 in the valve seat 31 has a certain height, and the liquid (high viscosity compound) in the tank will inevitably enter the vertical part 311 during stirring, the spiral blades 23 are arranged so that while the stirring motor 2 drives the stirring blades to stir, the spiral blades 23 can rotate synchronously. Since the upper part of the spiral blades 23 is exposed inside the tank body 1 and the lower part is located inside the vertical part 311, and the direction of rotation is opposite to the direction of rotation of the stirring shaft 21 at this time, it can lift the liquid in the vertical part 311 of the valve body, ensuring that all the liquid in the tank body 1 can be fully mixed. In addition, when the stirring motor 2 reverses, that is, when discharging, the spiral blades 23 can also assist in continuously conveying the liquid in the tank downwards, providing auxiliary thrust, and further reducing the liquid residue in the tank body 1.

[0048] Furthermore, during stirring, the continuous upward flow of liquid reduces the hydraulic pressure within the valve seat 31, thereby facilitating the drive unit 34 to pull out the piston 332 located within the inclined section 312. Once the piston 332 is pulled out, the stirring motor 2 reverses to discharge the material.

[0049] like Figure 1-3 As shown, a scraper 24 is also provided on the lower surface of the stirring shaft 21. The end of the scraper 24 away from the stirring shaft 21 is inclined downward and contacts the bottom surface of the tank 1. The scraper 24 is twisted, and when the stirring tank is in the stirring state, the twisting direction of the scraper 24 is opposite to the rotation direction of the stirring shaft 21.

[0050] As an optional implementation of this utility model, the scraper 24 serves to scrape away the liquid on the bottom surface of the tank 1 during discharge. Combined with the fact that the twisting direction of the scraper 24 is the same as the opposite direction of the aforementioned spiral blade 23, it allows the liquid at the bottom of the tank 1 to flow upwards during stirring, thereby improving the mixing effect. During discharge, it continuously pushes the liquid flowing to the bottom of the scraper 24 towards the discharge port 12. This technical solution does not further limit the specific number or arrangement of the scrapers 24.

[0051] The working principle and usage process of this utility model are as follows: Raw materials enter the tank 1 through the feed inlet 11. There can be multiple feed inlets 11, and this technical solution does not limit the number of inlets. During operation, the stirring motor 2 drives the stirring shaft 21 to rotate, which in turn drives the stirring paddle 22 to stir the high-viscosity compound inside the tank 1. When stirring is completed, the drive unit 34 operates, thereby causing the valve rod 331 to retract and the piston 332 to move out of the inclined section. Therefore, the tank 1 is connected to the external discharge pipe to realize material discharge.

[0052] Finally, it should be noted that since low-speed stirring tanks are typically required to be cleaned when used for stirring high-viscosity compounds, all assembly methods in this technical solution, especially the fixed connection methods, can be directly referenced from existing technologies. The choice of connection method in this technical solution, whether it is welding or a detachable connection, or the specific method of detachable connection, does not involve any improvement.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-speed mixing tank for easy material discharge, comprising a tank body, a mixing motor disposed at the top of the tank body, a feed inlet, and a discharge outlet disposed at the bottom of the tank body, wherein one end of the mixing motor is provided with a mixing shaft that can extend into the tank body, the mixing shaft is provided with a plurality of mixing blades, and the bottom of the tank body is also provided with a discharge valve, characterized in that, The discharge valve includes: The valve seat includes a vertical part and an inclined part that are interconnected, the vertical part being connected to the bottom of the tank and communicating with the discharge port; A flange is provided at the outlet end of the inclined section, and the flange is used to connect to an external discharge pipe; The valve core includes a valve stem and a piston disposed at the end of the valve stem, the valve stem being slidably connected to the vertical part, and the axis of the valve stem being aligned with the center line of the inclined part; A drive unit is used to drive the valve stem to slide. The drive unit includes a cylinder and is fixedly connected to the outer surface of the valve seat.

2. The low-speed mixing tank for easy material discharge according to claim 1, characterized in that, The angle between the inclined part and the vertical part is 90-180°.

3. The low-speed mixing tank for easy material discharge according to claim 2, characterized in that, The tilt angle of the inclined part is 125-145°.

4. The low-speed mixing tank for easy material discharge according to claim 1, characterized in that, The valve stem is slidably connected to the side wall of the vertical part via a sealing gasket.

5. A low-speed mixing tank for easy material discharge according to any one of claims 1-4, characterized in that, The stirring shaft can extend into the inclined part, and the bottom axial surface of the stirring shaft is provided with a spiral blade. When the stirring tank is in the stirring state, the spiral blade rotates in the opposite direction to the rotation direction of the stirring shaft.

6. A low-speed mixing tank for easy material discharge according to claim 5, characterized in that, The upper part of the spiral blade is located inside the tank.

7. A low-speed mixing tank for easy material discharge according to claim 1, characterized in that, A scraper is also provided on the lower surface of the stirring shaft, with the end of the scraper away from the stirring shaft tilted downward and in contact with the bottom surface of the tank.

8. A low-speed mixing tank for easy material discharge according to claim 7, characterized in that, The scraper is twisted, and when the mixing tank is in the mixing state, the twisting direction of the scraper is opposite to the rotation direction of the mixing shaft.

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