Self-suction stirring paddle

Abstract

The utility model belongs to the technical field of stirring and mixing, and discloses a self-suction type stirring paddle. The self-suction type stirring paddle comprises a hub and a disc, the hub is arranged in the center of the disc in a penetrating mode, a hub through hole is formed in the hub, hub air holes are formed in the circumferential direction of the disc, the hub through hole is communicated with the hub air holes, U-shaped paddles are arranged in the circumferential direction of the disc, the liquid facing faces of the U-shaped paddles are concave inwards, and the liquid facing faces of the U-shaped paddles are concave inwards. And the cross sections of the upper sub-blade and the lower sub-blade are curves. According to the self-suction type stirring paddle provided by the utility model, the cavitation phenomenon of gas-liquid stirring can be weakened, meanwhile, liquid can be quickly dispersed outwards to be mixed with gas, the U-shaped paddle blades are easy to break bubbles generated by a gas channel, and the self-suction type stirring paddle is stable in self-suction efficiency, good in stirring effect and high in stirring efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of stirring and mixing, and in particular relates to a self-priming stirring paddle. Background Art

[0002] For the need of gas-liquid two-phase mixing, the self-priming impeller is a type of high-efficiency gas-liquid mixing equipment. Due to its advantages such as simple structure, low energy consumption and high gas utilization rate, it has broad application potential in the production processes of fermentation, hydrogenation, oxidation, amination and alkylation in the food, medicine, petroleum and biochemical industries.

[0003] Common self-priming impellers include tubular, back-blade, and disc turbine types. They all operate by displacing the liquid at a certain speed, forming a negative pressure on the back surface of the impeller, sucking in the gas in the upper space of the liquid through the hollow impeller shaft, forming cavitation on the back of the impeller, and then the cavitation breaks at the tail. These small bubbles are thrown out under the action of centrifugal force and dispersed to other areas in the tank with the flow of liquid, thereby performing a gas-liquid mixing movement. However, when the cavitation formed on the back of the impeller during operation is large, it will affect the pressure difference at the outlet and reduce the suction efficiency. At high speeds, sometimes the entire impeller is surrounded by cavitation, and the impeller is almost idling, with very low efficiency and poor self-priming effect. At this time, the presence of cavitation reduces the rotational resistance of the impeller, resulting in a poor stirring effect, reduced stirring efficiency, and even the risk of hollow shaft breakage.

[0004] Prior art CN201510847U discloses a self-priming agitator, including blades and a hub, wherein the blades are evenly distributed on the hub and adopt an arc-shaped backward curved blade structure, forming a conical cavity in the middle of each blade, and the hub and the hollow shaft are integrally welded without gaps. However, the blades in this patent are arc-shaped backward curved blade structures, and a conical cavity is formed in the middle of each blade, which will generate large cavitations when rotating at high speeds, and then the blades of the agitator will be surrounded by cavitations. At this time, the agitator is almost idling, and the self-priming efficiency is unstable, thereby reducing the stirring efficiency. Utility Model Content

[0005] The utility model aims to address the defects of the prior art and provide a self-priming stirring paddle that can reduce the cavitation phenomenon of gas-liquid stirring, while guiding the liquid to disperse outward faster and mix with the gas, and the U-shaped blade is easier to break the bubbles generated in the gas channel, and the self-priming efficiency is stable, the stirring effect is good, and the space utilization rate is high.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] A self-priming stirring paddle comprises a hub and a disc; the hub is arranged through the center of the disc, a hub through hole is arranged in the hub, and hub air holes are arranged along the circumference of the disc, and the hub through holes are connected to the hub air holes; a U-shaped blade is arranged circumferentially of the disc, the liquid-facing surface of the U-shaped blade is concave inward, and the blade is divided into upper and lower sub-blades by the disc, and the cross-sections of the upper and lower sub-blades are curved.

[0008] Furthermore, it also includes a hollow gas channel, which is connected to the hub through hole through the hub air hole and is arranged along the circumference of the disk;

[0009] The hollow gas channel is arranged close to the back liquid surface of the U-shaped blade, and the gas outlet of the hollow gas channel is located at the back liquid surface of the U-shaped blade.

[0010] Furthermore, the bending arc length of the upper sub-blade of the U-shaped blade is greater than or equal to the bending arc length of the lower sub-blade.

[0011] Furthermore, the bending arc length of the upper sub-blade of the U-shaped blade is greater than the bending arc length of the lower sub-blade.

[0012] As a preferred solution, the side edges on the left and right sides of the U-shaped blade are bent along the flow direction of the stirred liquid.

[0013] As a preferred solution, the number of the U-shaped blades is 3-8.

[0014] Furthermore, the number of the U-shaped blades is 6.

[0015] As a preferred solution, the hollow gas channel is provided at least at the upper end, the middle part, or the lower end of the disc;

[0016] When the hollow gas channel is arranged in the middle of the disc, an interlayer is arranged in the middle of the disc, and the hollow gas channel is arranged in the interlayer in the middle of the disc.

[0017] Furthermore, the hollow gas channel is arranged at the lower end of the disc.

[0018] As a preferred solution, the air outlet is arranged at 1 / 2-3 / 4 of the radial width of the U-shaped blade.

[0019] Compared with the prior art, the beneficial effects produced by the utility model are:

[0020] (1) The U-shaped blade of the utility model is concave inward on the liquid-facing surface and is divided into upper and lower sub-blades by a disc. The cross-sections of the upper and lower sub-blades are curved, which can reduce the cavitation phenomenon during gas-liquid mixing. The cavitation is broken quickly, the gas dispersion ability is strong, the self-priming power is stable, and the mass transfer effect and gas-liquid mixing efficiency are improved. At the same time, the structure can quickly disperse the liquid outward, so that the gas and liquid are mixed faster, and the mixing efficiency is improved;

[0021] (2) The hollow gas channel of the utility model is arranged along the circumference of the disk, and the hollow gas channel is set close to the back liquid surface of the U-shaped blade. The bending arc length of the upper sub-blade of the U-shaped blade is greater than the bending arc length of the lower sub-blade. The outlet of the hollow gas channel is located at 1 / 2-3 / 4 of the radial width of the U-shaped blade, so that the U-shaped blade is easier to beat and break the bubbles generated by the gas channel in front of it, thereby increasing the mixing speed of liquid and gas and achieving a good stirring effect;

[0022] (3) The side edges on the left and right sides of the U-shaped blade of the utility model are bent along the flow direction of the stirred liquid, so that when the U-shaped blade guides the liquid to disperse outward, the direct impact force of the liquid on the U-shaped blade becomes smaller, reducing the direct impact resistance and thus improving the stirring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The structure of the self-priming stirring paddle of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 2 The structure of the self-priming stirring paddle of the utility model is shown in FIG. Figure 2 ;

[0025] Figure 3 The structure of the self-priming stirring paddle of the utility model is shown in FIG. Figure 3 ;

[0026] Figure 4 This is a schematic diagram showing that the hollow gas channel is located at the lower end of the disc;

[0027] Figure 5 This is a schematic diagram showing that the hollow gas channel is located at the upper end of the disc;

[0028] Figure 6 This is a schematic diagram of the hollow gas channel being located in the middle of the disk;

[0029] Figure 7 It is a schematic diagram of the hollow gas channel being located at the lower end of the disk when the bending arc length of the upper sub-blade is greater than the bending arc length of the lower sub-blade;

[0030] Figure 8 It is a schematic diagram of the hollow gas channel being located at the upper end of the disk when the bending arc length of the upper sub-blade is greater than the bending arc length of the lower sub-blade;

[0031] Fig. 9 It is a schematic diagram of the hollow gas channel being located in the middle of the disk when the bending arc length of the upper sub-blade is greater than the bending arc length of the lower sub-blade;

[0032] Fig.10 It is a schematic diagram of the structure of a self-priming stirring paddle when the side edges on the left and right sides of the U-shaped paddle are straight lines;

[0033] Fig.11 It is a schematic diagram of the structure of a self-priming stirring paddle when the side edges on the left and right sides of the U-shaped paddle are bent along the flow direction of the stirred liquid.

[0034] Explanation of the markings in the figure: 1. hub; 2. disc; 3. U-shaped blade; 31. upper sub-blade; 32. lower sub-blade; 33. left side edge of the U-shaped blade; 34. right side edge of the U-shaped blade; 4. hollow gas channel; 5. air outlet. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0038] Example 1

[0039] Combination Figure 1-6 As shown, an embodiment of the utility model provides a self-priming stirring paddle, including a hub 1 and a disc 2, wherein the hub 1 is penetrated through the center of the disc 2, a hub through hole is arranged in the hub 1, and hub air holes are arranged along the circumference of the disc, the hub through hole is connected to the hub air holes, a U-shaped blade 3 is arranged circumferentially on the disc, the liquid-facing surface of the U-shaped blade 3 is recessed inward, and the disc 2 is divided into upper and lower sub-blades 31 and 32, and the cross-sections of the upper and lower sub-blades 31 and 32 are curved lines; the utility model also includes a hollow gas channel 4, which is connected to the hub through hole through the hub air hole and is arranged along the circumference of the disc, the hollow gas channel is arranged close to the back liquid surface of the U-shaped blade, and the air outlet 5 of the hollow gas channel is located at the back liquid surface of the U-shaped blade, and the position of the air outlet 5 will not exceed the radial width of the U-shaped blade.

[0040] When the agitator rotates, the U-shaped blade displaces the liquid on the surface facing the liquid, which can quickly disperse the liquid outward and improve the stirring efficiency; the U-shaped blade is concave inward on the surface facing the liquid, and the formed air pockets are quickly broken up by the U-shaped blade, preventing the air pockets from causing the agitator to idle, stabilizing the self-priming power, and improving the mass transfer effect and gas-liquid mixing efficiency.

[0041] Preferably, Figure 7-9 As shown, the bending arc length of the upper sub-blade 31 of the U-shaped blade is greater than the bending arc length of the lower sub-blade 32, so that the blade is easier to beat and break the bubbles generated by the hollow gas channel in front of it, so that the liquid and gas are mixed faster and the stirring effect is better.

[0042] Example 2

[0043] like Figure 10-11 As shown, in this embodiment, the side edges 33 and 34 on the left and right sides of the U-shaped blade are bent along the flow direction of the stirred liquid, so that the direct impact force of the liquid on the U-shaped blade is reduced, thereby reducing the direct impact resistance.

[0044] The number of the U-shaped blades is 3-8. As a preferred embodiment, the number of the U-shaped blades is 6.

[0045] Example 3

[0046] The hollow gas channel can be arranged in combination or individually at the upper end, middle part and lower end of the disc according to actual conditions. When the hollow gas channel is arranged in the middle part of the disc, an interlayer is arranged in the middle part of the disc, and the hollow gas channel is arranged in the interlayer in the middle part of the disc; as a preferred embodiment, the hollow gas channel is arranged at the lower end of the disc, and the air outlet is arranged at the radial 1 / 2-3 / 4 width of the U-shaped blade, so that the bubbles generated by the gas channel are easier to move to the rear paddle and be broken up when moving in the liquid, so that the gas and liquid are mixed faster, the efficiency of gas-liquid mixing is improved, and the stirring effect is enhanced.

[0047] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the scope of application of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-priming stirring paddle, characterized in that: Including hub and disc; The wheel hub is arranged through the center of the disc, a wheel hub through hole is arranged in the wheel hub, and wheel hub air holes are arranged along the circumference of the disc, and the wheel hub through hole is connected to the wheel hub air holes; The disc is circumferentially provided with U-shaped blades, the liquid-facing surface of the U-shaped blades is inwardly concave and is divided into upper and lower sub-blades by the disc, and the cross sections of the upper and lower sub-blades are curved.

2. The self-priming stirring paddle according to claim 1, characterized in that: It also includes a hollow gas channel, which is connected to the hub through hole through the hub air hole and is arranged along the circumference of the disk; The hollow gas channel is arranged close to the back liquid surface of the U-shaped blade, and the gas outlet of the hollow gas channel is located at the back liquid surface of the U-shaped blade.

3. The self-priming stirring paddle according to claim 2, characterized in that: The bending arc length of the upper sub-blade of the U-shaped blade is greater than or equal to the bending arc length of the lower sub-blade.

4. The self-priming stirring paddle according to claim 3, characterized in that: The bending arc length of the upper sub-blade of the U-shaped blade is greater than the bending arc length of the lower sub-blade.

5. The self-priming stirring paddle according to claim 3, characterized in that: The side edges on the left and right sides of the U-shaped blade are bent along the flow direction of the stirred liquid.

6. The self-priming stirring paddle according to any one of claims 1 to 5, characterized in that: The number of the U-shaped blades is 3-8.

7. The self-priming stirring paddle according to claim 6, characterized in that: The number of the U-shaped blades is 6.

8. The self-priming stirring paddle according to any one of claims 2 to 5, characterized in that: The hollow gas channel is provided at least at the upper end, the middle part, or the lower end of the disc; When the hollow gas channel is arranged in the middle of the disc, an interlayer is arranged in the middle of the disc, and the hollow gas channel is arranged in the interlayer in the middle of the disc.

9. The self-priming stirring paddle according to claim 8, characterized in that: The hollow gas channel is arranged at the lower end of the disc.

10. The self-priming stirring paddle according to any one of claims 2 to 5, characterized in that: The air outlet of the hollow gas channel is arranged at 1 / 2-3 / 4 of the radial width of the U-shaped blade.

Images