Evaporation stirring device

Abstract

The utility model relates to the field of stirrers, and discloses an evaporation stirring device, which comprises a stirring shaft, a plurality of diversion trenches and a plurality of paddles, the plurality of paddles are divided into upper paddles and lower paddles, the length of the upper paddles is greater than or equal to that of the lower paddles, each of the upper paddles and the lower paddles comprises a blade root and a blade end, the section projection of the incident flow surface of the upper paddle and the lower paddle is of a linear structure, the section angle from the blade root to the blade end is in spiral equal-pitch gradual change, the horizontal included angle of the paddle is gradually reduced from 90 degrees from the blade root to the blade end, the number of the flow guide grooves is equal to the number of pairs of the paddle, the outer end of the paddle is connected with the flow guide grooves, one end of each flow guide groove is connected with the blade end of the upper paddle, and the other end of each flow guide groove is connected with the blade end of the lower paddle. And the horizontal inclination angle of the flow guide groove is the same as the inclination angle of the blade end of the blade correspondingly connected with the flow guide groove. Liquid can be guided in from the lower end and flow out from the upper end more easily, the flow guiding effect and the stirring effect are better, the liquidity of the liquid in the evaporation kettle is good, and the evaporation efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the field of stirrers, and in particular relates to an evaporation stirring device. Background Art

[0002] Evaporators are widely used in separation and purification, boasting high yields and high purity. They are widely used in food, pharmaceuticals, fertilizers, and biological products, playing a vital role in the production and purification of chemical products. To accelerate the evaporation process and prevent localized overheating or overcooling, some evaporators are equipped with an internal agitator. The rotation of the agitator increases the contact area between the material and the inner wall of the evaporator, improving the overall efficiency and quality of the evaporation process. Therefore, the presence of an agitator in the evaporator plays a crucial role. Existing agitators are somewhat effective in promoting material evaporation.

[0003] For example, patent document CN107008023A discloses a fluid evaporator, comprising a kettle body and an evaporator arranged in the kettle body, wherein the evaporator comprises a stirring shaft, a first hub and a second hub, wherein the first hub and the second hub are coaxially arranged at the middle and lower ends of the vertical shaft respectively, the outer circle of the first hub is evenly distributed with at least two first connecting plates pointing to the outside of the first hub, the outer end of the first connecting plate is provided with a first connecting groove, the outer circle of the second hub is provided with a second connecting plate in the same direction and with the same number as the first connecting plate, the outer end of the second connecting plate is provided with a second connecting groove corresponding to the first connecting groove, and a self-priming distributor is provided between the first connecting groove and the second connecting groove. The rotation of the stirring shaft of this technology drives the liquid to flow upward along the self-priming distributor to the top of the self-priming distributor, and then is ejected to the wall of the kettle for heating. However, since the connecting side of the connecting plate is arranged perpendicular to the stirring shaft, when the connecting plate discharges the liquid, the liquid will escape along both sides of the guide groove, and then the self-priming distributor cannot well guide the lower layer liquid to the upper layer, and the diversion effect is poor; at the same time, due to the small stirring diameter of the lower connecting plate, the flow speed in the middle area of ​​the evaporator is low, resulting in insufficient stirring of the bottom material, which may easily cause insufficient heating of the bottom material, thereby affecting the evaporation effect. Utility Model Content

[0004] The utility model aims to address the deficiencies of the existing technology and provide an evaporation stirring device which can more easily introduce liquid from the lower end and flow out from the upper end, has a better diversion effect, can fully stir the bottom material, has a better stirring effect, has good fluidity of the liquid in the evaporation kettle, and has high evaporation efficiency.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] An evaporation stirring device comprises a stirring shaft, a guide groove, and a plurality of blades, wherein the plurality of blades are divided into upper blades and lower blades;

[0007] The length of the upper blade is greater than or equal to the length of the lower blade;

[0008] The upper blade and the lower blade each include a blade root and a blade tip; the cross-sectional projection of the flow-impacting surface of the upper blade and the lower blade is a straight line structure; the cross-sectional angle from the blade root to the blade tip is a spiral constant pitch gradient; the horizontal angle of the blade gradually decreases from 90° from the blade root to the blade tip;

[0009] The outer end of the blade is connected to a guide groove, one end of the guide groove is connected to the blade end of the upper blade, and the other end is connected to the blade end of the lower blade. The horizontal inclination angle of the guide groove is the same as the inclination angle of the blade end connected to it.

[0010] Preferably, the length of the upper blade is greater than the length of the lower blade.

[0011] Preferably, the horizontal angle between the blade tip of the upper blade and the blade tip of the lower blade is greater than 0° and less than 90°.

[0012] Preferably, the blade root width of the lower blade is greater than or equal to the blade root width of the upper blade.

[0013] Preferably, the blade root width of the lower blade is greater than the blade root width of the upper blade.

[0014] Preferably, the bottom edge of the lower blade exceeds the bottom end of the guide groove.

[0015] Preferably, a plurality of groups of upward-turning blades are provided at the bottom end of the stirring shaft.

[0016] Preferably, the number of the guide grooves is 2-4.

[0017] Preferably, the cross-sectional shape of the guide groove is one of semicircular, arc-shaped, L-shaped, U-shaped, V-shaped, and concave.

[0018] Preferably, the cross-sectional shape of the guide groove is semicircular.

[0019] Compared with the prior art, the beneficial effects produced by the present invention are:

[0020] (1) The utility model sets the cross-sectional angle of the blade from the blade root to the blade tip in a spiral with equal pitch gradient, and the horizontal angle of the blade gradually decreases from 90° from the blade root to the blade tip, so that the horizontal inclination angle of the guide groove is the same as the inclination angle of the blade tip connected to it, thereby reducing the resistance of the blade facing the liquid surface and weakening the phenomenon of liquid escaping along both sides of the guide groove. In addition, when the stirring shaft rotates, the guide groove can more easily introduce liquid from the lower end and flow out from the upper end, thereby improving the diversion effect;

[0021] (2) The blade root width of the lower blade of the utility model is greater than the blade root width of the upper blade, so that when the stirring shaft rotates, the lower blade can fully stir the bottom material, enhance the fluidity of the liquid in the evaporator, make the material in the evaporator fully and evenly heated, and improve the evaporation efficiency;

[0022] (3) The present invention can further enhance the stirring effect of the lower blade on the bottom material by making the bottom edge of the lower blade extend beyond the bottom end of the guide groove, thereby further improving the evaporation efficiency;

[0023] (4) By adding several sets of upward-turning blades at the bottom end of the stirring shaft, the fluidity of the liquid in the evaporator can be further improved, thereby improving the evaporation efficiency and shortening the evaporation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of an evaporation and stirring device according to the utility model from a first angle;

[0025] Figure 2 This is a structural schematic diagram of an evaporation and stirring device according to the utility model from a second angle;

[0026] Figure 3 This is a structural schematic diagram of an evaporation and stirring device according to the present invention from a third angle;

[0027] Figure 4 This is a partial structural diagram of the stirring shaft and upper blades of the utility model;

[0028] Figure 5 This is a schematic structural diagram of the first angle in which the length of the upper blade of the utility model is equal to the length of the lower blade;

[0029] Figure 6 This is a schematic diagram of the structure of the second angle in which the length of the upper blade of the utility model is equal to the length of the lower blade;

[0030] Figure 7 This is a schematic structural diagram of the third angle in which the length of the upper blade of the present invention is equal to the length of the lower blade;

[0031] Figure 8 This is a schematic structural diagram of the first angle of the utility model in which the length of the upper blade is greater than the length of the lower blade, and the blade root width of the lower blade is greater than the blade root width of the upper blade;

[0032] Figure 9 This is a schematic diagram of the structure of the second angle in which the length of the upper blade is greater than the length of the lower blade, and the root width of the lower blade is greater than the root width of the upper blade.

[0033] Figure 10 This is a schematic diagram of the structure of the third angle of the utility model in which the length of the upper blade is greater than the length of the lower blade, and the root width of the lower blade is greater than the root width of the upper blade;

[0034] Figure 11 for Figure 9 A schematic diagram of the structure of the first angle at which the bottom edge of the middle and lower blade exceeds the bottom end of the guide groove;

[0035] Figure 12 for Figure 9 A schematic diagram of the structure showing a second angle at which the bottom edge of the middle and lower blade extends beyond the bottom end of the guide groove;

[0036] Figure 13 for Figure 9 Schematic diagram of the structure where the bottom edge of the middle and lower blade exceeds the bottom end of the guide groove at the third angle

[0037] Figure 14 This is a schematic diagram of the structure of the first angle of adding several groups of upturned blades at the bottom end of the stirring shaft;

[0038] Figure 15 This is a schematic diagram of the structure of the second angle in which several groups of upturned blades are added to the bottom end of the stirring shaft;

[0039] Figure 16 This is a schematic diagram of the structure of the third angle in which several groups of upturned blades are added to the bottom end of the stirring shaft.

[0040] Explanation of the accompanying symbols: 1. stirring shaft; 2. blade; 21. upper blade; 211. blade root of upper blade; 212. blade tip of upper blade; 22. lower blade; 221. blade root of lower blade; 222. blade tip of lower blade; 3. guide groove; 4. upturned blade. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] 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", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 cannot be understood as a limitation on the present invention.

[0043] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like 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 present invention according to the specific circumstances.

[0044] Example 1

[0045] Combine Figure 1-7 As shown, the embodiment of the present invention provides an evaporation stirring device, including a stirring shaft 1, a plurality of guide grooves 3, and a plurality of blades 2. The plurality of blades 2 are divided into an upper blade 21 and a lower blade 22; the length of the upper blade 21 is set to L, and the length of the lower blade 22 is set to l. The length L of the upper blade 21 is greater than or equal to the length l of the lower blade 22. The upper blade 21 and the lower blade 22 both include a blade root and a blade tip. The cross-sectional projection of the upstream surface of the upper blade 21 and the lower blade 22 is a straight line structure. The cross-sectional angle from the root to the blade tip is a spiral with a constant pitch gradient, and the horizontal angle of the blade gradually decreases from 90° from the blade root to the blade tip; the number of the guide grooves 3 is equal to the logarithm of the blade; the outer end of the blade is connected by the guide groove, specifically, the number of the guide grooves 3 is 2-4, one end of the guide groove 3 is connected to the blade tip 212 of the upper blade, and the other end is connected to the blade tip 222 of the lower blade, and the inclination angle of the guide groove 3 is the same as the horizontal angle of the blade tip 212 of the upper blade and the blade tip 222 of the lower blade.

[0046] By gradually setting the straight line angle of the blade cross section from the blade root to the blade end in a spiral with equal pitch, the horizontal angle gradually decreases from 90° from the blade root to the blade end, and the horizontal inclination angle of the guide groove 3 is the same as the inclination angle of the blade end connected to it, thereby reducing the resistance of the blade facing the liquid surface, weakening the phenomenon of liquid escaping along both sides of the guide groove 3, and making it easier for the guide groove 3 to introduce liquid from the lower end and flow out from the upper end when the stirring shaft 1 rotates, thereby improving the diversion effect.

[0047] Example 2

[0048] Combine Figure 8-10 As shown, unlike Example 1, in this embodiment, the length L of the upper blade 21 is greater than the length l of the lower blade 22, the width of the blade root 211 of the upper blade is set to H, and the width of the blade root 221 of the lower blade is set to h, and the width h of the blade root 221 of the lower blade is greater than or equal to the width H of the blade root 211 of the upper blade. Preferably, the width h of the blade root 221 of the lower blade is greater than the width H of the blade root 211 of the upper blade.

[0049] By setting the width h of the blade root 221 of the lower blade to be greater than the width H of the blade root 211 of the upper blade, when the stirring shaft 1 rotates, the lower blade 22 can fully stir the bottom material, enhance the fluidity of the liquid in the evaporator, ensure that the material in the evaporator is fully and evenly heated, and improve the evaporation efficiency.

[0050] Example 3

[0051] Combine Figure 11-13 As shown, in this embodiment, the bottom edge of the lower blade 22 exceeds the bottom end of the guide groove 3.

[0052] By making the bottom edge of the lower blade 22 extend beyond the bottom end of the guide groove 3, the stirring effect of the lower blade 22 on the bottom material can be further enhanced, thereby further improving the evaporation efficiency.

[0053] Example 4

[0054] In this embodiment, the cross-sectional shape of the guide groove 3 is one of a semicircular shape, an arc shape, an L shape, a U shape, a V shape, and a concave shape. Preferably, the cross-sectional shape of the guide groove 3 is a semicircular shape.

[0055] Example 5

[0056] Combine Figure 14-16 As shown, in this embodiment, a plurality of groups of upward-turned blades 4 are provided at the bottom end of the stirring shaft 1 .

[0057] By additionally providing a plurality of groups of upward-turning blades 4 at the bottom end of the stirring shaft 1 , the fluidity of the liquid in the evaporator can be further improved, thereby improving the evaporation efficiency and shortening the evaporation time.

[0058] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the scope of application of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An evaporation stirring device, characterized in that: It includes a stirring shaft, a plurality of guide grooves, and a plurality of blades, wherein the plurality of blades are divided into upper blades and lower blades; The length of the upper blade is greater than or equal to the length of the lower blade; The upper blade and the lower blade each include a blade root and a blade tip; the cross-sectional projection of the flow-impacting surface of the upper blade and the lower blade is a straight line structure; the cross-sectional angle from the blade root to the blade tip is a spiral constant pitch gradient; the horizontal angle of the blade gradually decreases from 90° from the blade root to the blade tip; The number of the guide grooves is equal to the logarithm of the upper blades and the lower blades. The outer ends of the blades are connected to guide grooves. One end of the guide groove is connected to the blade end of the upper blade, and the other end is connected to the blade end of the lower blade. The horizontal inclination angle of the guide groove is the same as the inclination angle of the blade end of the blade connected thereto.

2. The evaporation stirring device according to claim 1, characterized in that: The length of the upper blade is greater than the length of the lower blade.

3. The evaporation stirring device according to claim 2, characterized in that: The horizontal angle between the blade tip of the upper blade and the blade tip of the lower blade is greater than 0° and less than 90°.

4. The evaporation stirring device according to claim 3, characterized in that: The blade root width of the lower blade is greater than or equal to the blade root width of the upper blade.

5. The evaporation stirring device according to claim 4, characterized in that: The blade root width of the lower blade is greater than the blade root width of the upper blade.

6. The evaporation stirring device according to claim 4, characterized in that: The bottom edge of the lower blade exceeds the bottom end of the guide groove.

7. The evaporation stirring device according to claim 4, characterized in that: A plurality of groups of upward-turning blades are arranged at the bottom end of the stirring shaft.

8. The evaporation stirring device according to any one of claims 1 to 7, characterized in that: The number of the guide grooves is 2-4.

9. The evaporation stirring device according to any one of claims 1 to 7, characterized in that: The cross-sectional shape of the guide groove is one of a semicircle, an arc, an L-shape, a U-shape, a V-shape, and a concave shape.

10. The evaporation stirring device according to claim 9, characterized in that: The cross-sectional shape of the guide groove is semicircular.

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