A fluid flow balancing unit, flow distribution module and flow balancing device

Abstract

The present invention belongs to a flow balancing device, and specifically relates to a fluid flow balancing unit, a flow diversion module and a flow balancing device. The fluid flow balancing unit includes two flow balancing plates and a guide plate located between the two flow balancing plates. The upper part of the guide plate is provided with a protrusion for single-stream fluid flow balancing. The upper part and the side of the flow balancing plate protrude from the guide plate. The protrusion and the guide plate form a guide groove through which the fluid passes. The fluid flow balancing unit of the present invention can divide a single-stream fluid into equal parts. When the fluid flow balancing units are combined to form a fluid flow balancing device, fluid flow balancing can be performed with good effect. The overall structure is simple and the operation is convenient. Excellent flow balancing effect can be achieved only by gravity.

Description

Technical Field

[0001] The present invention relates to a flow balancing device, and in particular to a fluid flow balancing unit, a flow splitting module and a flow balancing device. Background Art

[0002] Fluids involve many fields and industries and are widely used, including small particle solid "fluids", liquid flows, air flows, and supercritical flows. The flow of fluids in a certain medium is often disturbed by factors such as uneven resistance distribution, viscosity, speed, and elasticity. Conventional methods are difficult to achieve a controllable flow-balancing effect.

[0003] At present, fluids are widely used, from conventional gas flow and liquid flow to "small particle solid flow" with similar fluid flow characteristics. It is currently difficult to achieve a very uniform effect simply or without the help of forces other than gravity; even if a uniform effect is achieved when certain conditions are met, it is difficult to achieve a uniform flow effect of the fluid under unsaturated flow without the help of external forces. Examples of adverse effects: ①. When the fluid is unevenly distributed, the difference in force at each receiving part will cause uneven damage to the receiving device; ②. When the "solid particle flow" is filled, the cumulative receiving amount at each part is different, and the whole is piled up into a cone shape, with uneven local thickness and density; ③. Local insufficient and excessive synthesis reactions are prone to low reaction yields, side reactions, and reaction out of control. Summary of the invention

[0004] The technical problem to be solved by the present invention is to invent a fluid flow balancing unit, a flow splitting module and a flow balancing device which can achieve flow balancing only by relying on the fluid's own gravity.

[0005] The content of the present invention includes: a fluid flow balancing unit, including two flow balancing plates and a guide plate located between the two flow balancing plates, the upper part of the guide plate is provided with a protrusion for single-stream fluid flow balancing, the upper part and the side of the flow balancing plate protrude from the guide plate setting, and the protrusion and the guide plate form a guide groove through which the fluid passes.

[0006] Furthermore, the slopes of both sides of the top of the protrusion are consistent.

[0007] Furthermore, the guide groove is a straight groove or a wave groove.

[0008] Furthermore, a concave portion I is provided at the bottom of the guide plate.

[0009] A fluid flow distribution module comprises fluid flow balancing units, which are connected and fixed to each other to form an axisymmetric figure in a vertical direction with a trapezoidal upper portion and an inverted triangle lower portion. The upper trapezoid is provided with several layers, the top layer is provided with at least 2 fluid flow balancing units, each layer downward has one more fluid flow balancing unit than the previous layer, the top layer of the lower inverted triangle has one or three fewer fluid flow balancing units than the bottom layer of the upper trapezoid, and each layer downward has one less fluid flow balancing unit than the previous layer.

[0010] Furthermore, the horizontal spacings of the plurality of guide grooves located on the outer sides of the two waists of the lower inverted triangle are consistent.

[0011] A fluid flow balancing device comprises fluid flow balancing modules, wherein at least two groups of fluid flow balancing modules are arranged in a longitudinally staggered manner, wherein the symmetry axis of one group of fluid flow balancing modules is aligned with the side of the outermost fluid flow balancing unit of another group of fluid flow balancing modules.

[0012] Furthermore, the fluid flow equalizing modules are arranged in a plurality of groups in parallel in the transverse direction and in a plurality of groups in a staggered arrangement in the longitudinal direction.

[0013] The fluid flow equalizing device also includes a fluid flow blocking device, which includes a plurality of baffles arranged on the side edges of the guide grooves outside the two waists of the lower inverted triangle. The baffles block the side edges of the guide grooves outside the two waists to prevent the fluid from being thrown out in a parabola.

[0014] The fluid flow equalizing device also includes a fluid confluence device, which includes a confluence plate arranged at the bottom of a plurality of baffles, the bottoms of the baffles are flush, the confluence plate extends downwardly along one side of the baffle plate to the other side, and the two confluence plates at the overlapping parts of the two groups of fluid diversion modules arranged in an staggered manner enclose a confluence groove.

[0015] The beneficial effects of the present invention are:

[0016] The fluid flow balancing unit of the present invention can achieve equal division of a single fluid. When the fluid flow balancing units are combined to form a fluid flow balancing device, the fluid flow balancing can be performed with good effect. The overall structure is simple and the operation is convenient. Excellent flow balancing effect can be achieved only by gravity.

[0017] The guide groove is provided with straight grooves or wave grooves, corresponding to the non-viscous fluid and the viscous fluid respectively, to ensure the equal flow effect of the two;

[0018] The inner recess I is arranged at the bottom of the guide plate to prevent the viscous fluid from gathering or deflecting in the middle when it moves from the bottom of the guide groove to the bottom of the guide plate.

[0019] The fluid flow equalization modules are arranged in several groups side by side horizontally, and are arranged in several groups in a staggered manner vertically to form a fluid flow equalization device, which can be projected into rectangular, fan-shaped, circular and other geometric flow equalization areas to improve the use efficiency and meet different flow equalization requirements;

[0020] By setting a fluid blocking device, the fluid in the guide groove outside the two waists of the lower inverted triangle is prevented from being thrown out in a parabolic shape, thereby affecting the flow balancing effect;

[0021] A fluid confluence device is provided to converge the overlapping parts of two staggered fluid flow diversion modules in the front-to-back direction, thereby improving the flow balancing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram from a first angle of the first embodiment of the fluid flow balancing unit of the present invention.

[0023] Figure 2 It is a schematic structural diagram from a second angle of the first embodiment of the fluid flow balancing unit of the present invention.

[0024] Figure 3 FIG. 1 is a schematic diagram of a first embodiment of a fluid flow distribution module according to the present invention.

[0025] Figure 4 FIG. 1 is a schematic diagram of a first embodiment of a fluid flow distribution module according to the present invention.

[0026] Figure 5 FIG. 1 is a schematic diagram of a first embodiment of a fluid flow distribution module according to the present invention.

[0027] Figure 6 It is a schematic structural diagram of the second embodiment of the fluid flow balancing unit of the present invention.

[0028] Figure 7 It is a schematic assembly diagram of the second embodiment of the fluid flow distribution module of the present invention.

[0029] Figure 8 FIG. 1 is a top view of a second embodiment of a fluid flow distribution module according to the present invention.

[0030] Fig. 9 It is a three-dimensional diagram of the second embodiment of the fluid diversion module of the present invention.

[0031] Fig.10 It is a schematic diagram of the structure of the plugging piece I in the present invention.

[0032] Fig.11 Schematic diagram of the channel path in the fluid diversion module of the present invention.

[0033] Fig.12 It is a front view of the fluid flow equalization device in the present invention.

[0034] Fig.13 Schematic diagram of the fluid flow equalization device in the present invention.

[0035] Fig.14 It is a top view of the fluid flow equalization device in the present invention.

[0036] Fig.15 It is a schematic structural diagram of the fluid flow equalization device in the present invention.

[0037] Fig.16 It is a left view of the structure of the fluid flow equalization device in the present invention.

[0038] Fig.17 It is a schematic diagram of the structure of the flow guiding device and the flow converging device in the present invention.

[0039] Fig.18 It is a front view of the deformed structure of the fluid diversion module in the present invention.

[0040] Fig.19 It is a front view of the deformed structure of the fluid flow equalizing device in the present invention.

[0041] In the figure, 1 is a flow balancing unit, 11 is a flow balancing plate, 12 is a guide plate, 13 is a protrusion, 14 is a guide groove, 15 is a concave Ⅰ, 16 is a connection point, 1a is a deformation unit Ⅰ, 1b is a deformation unit Ⅱ, 2 is a sealing piece Ⅰ, 2a is a deformed sealing piece Ⅰ, 2b is a deformed sealing piece Ⅱ, 3 is a channel, 4 is a flow blocking device, 41 is a flow blocking plate, 42 is a sealing piece Ⅱ, 43 is a guide groove, 5 is a confluence device, 51 is a confluence plate, 52 is a confluence groove, 53 is a confluence hole, and 54 is a concave Ⅱ. DETAILED DESCRIPTION

[0042] like Figure 1-19 As shown, the present invention includes a fluid flow balancing unit, including two flow balancing plates 11 and a guide plate 12 located between the two flow balancing plates 11, the upper portion of the guide plate 12 is provided with a protrusion 13 for single-stream fluid flow balancing, the upper portion and the side portion of the flow balancing plate 11 protrude from the guide plate 12, and the protrusion and the guide plate 12 form a guide groove 14 through which the fluid passes.

[0043] Except for the fluid flow balancing units located at the top layer of the upper trapezoid and the two waists of the trapezoid, during the use of the remaining fluid flow balancing units, the fluid is equally divided from a single stream into two streams by the protrusion 13 and flows to the guide grooves 14 on both sides respectively to achieve equal distribution. The two flow balancing plates 11 can be rectangular or other shapes that can form guide grooves 14 with the guide plates 12. In this embodiment, as Figure 1 and Figure 2 As shown, the flow equalizing plate 11 is a hexagonal structure with a convex top and a concave bottom, which is similar to the cross-sectional shape of the guide plate 12 but slightly larger than the guide plate 12 .

[0044] In order to ensure that the fluid is evenly distributed from the top protrusion 13 of the fluid flow balancing unit, the slopes of the two sides of the top of the protrusion 13 are consistent. Figure 1 The fluid flow unit and Fig.18 The deformation unit Ⅰ1a and the deformation unit Ⅱ1b shown are at the top of the protrusion 13, and the angles between the left and right sides and the vertical direction are consistent, so that when the fluid flows from the previous guide groove 14 to the top of the protrusion 13, the same slope makes the fluid flow evenly to the guide grooves 14 on both sides.

[0045] like Figure 1-Figure 5 As shown, for a non-viscous fluid, the guide groove 14 is a straight groove, and the guide grooves 14 of the two parallel fluid flow equalization units are formed as shown in FIG. Figure 4The square channel 3 shown in the figure can make the fluid flow vertically downward, and can be widely used in gases, liquids, solid particles with good fluidity, etc. whose density is greater than the density of the gas in the use environment, such as Figure 6-8 As shown in the figure, for a viscous fluid, the guide groove 14 can be a wave groove, and the guide grooves 14 of the two parallel fluid flow units are formed as follows: Figure 8 The wavy channel 3 (sine and cosine curves) shown can guide the viscous fluid to flow to the center of the protrusion 13 of the lower fluid flow equalization unit to ensure the flow equalization effect (high viscosity itself has poor fluidity, and the use of this device generally requires a relatively longer time and speed / quantity limit).

[0046] The bottom of the guide plate 12 is provided with a concave Ⅰ15, and the concave Ⅰ15 makes the two sides of the bottom of the guide plate 12 thin sheets. The thin sheets have acute angles in the front view, and the angles with the horizontal direction are acute angles. The two angles are complementary angles to each other, so as to prevent the viscous fluid from gathering or deviating to the middle of the bottom of the guide plate 12 when flowing along the guide groove 14 to the bottom of the guide plate 12, and save materials at the same time.

[0047] The present invention also provides a fluid flow distribution module, comprising a fluid flow balancing unit, the fluid flow balancing units are connected and fixed to each other to form an axisymmetric figure in a vertical direction with a trapezoidal upper portion and an inverted triangle lower portion, the upper trapezoid is provided with several layers, the top layer is provided with at least 2 fluid flow balancing units, each layer downwards has one more fluid flow balancing unit than the previous layer, the top layer of the lower inverted triangle has one or three less fluid flow balancing units than the bottom layer of the upper trapezoid, and each layer downwards has one less fluid flow balancing unit than the previous layer, such as Figure 5 , Fig. 9 , Fig.11 and Fig.18 As shown, the fluid flow distribution module is in the shape of a plate as a whole, and the fluid flow equalization units in each row are connected and fixed in sequence from left to right. The upper trapezoidal row increases by one fluid flow equalization unit in sequence, and the lower inverted triangle row decreases by one fluid unit in sequence. The fluid flow distribution module is assembled by the fluid flow distribution units, and the guide grooves 14 of the two fluid flow distribution units cooperate to form a channel 3, which is embodied in the fluid flow distribution module as follows Fig.11 and Fig.18 In the diversion channel path shown by the thick black solid line, the fluid enters the diversion module from the middle of the two fluid equalizing units at the top, and is diverted through the diversion channel, and finally flows out through the guide groove 14 at the dotted line (the dotted line represents the fluid).

[0048] In order to ensure that the fluid flows evenly, the fluid flowing down the two middle rows of guide grooves 14 of one group of fluid diversion modules has the same lateral spacing as the fluid flowing down the side guide grooves of another group of fluid diversion modules that are longitudinally staggered, and the horizontal spacing of several guide grooves 14 located on the outside of the two waists on the lower inverted triangle is consistent, so that when the flow is evenly distributed, complete equal division is achieved, which is applied to high-requirement flow evenly distributed devices.

[0049] Specifically, Fig.18 and Fig.19 As shown, in this embodiment, the bottom inverted triangle top layer has one less fluid flow balancing unit than the top trapezoid bottom layer. Taking the total number of layers as 10 as an example, the middle two examples of the fluid flow distribution module have equally distributed fluid flow balancing units, namely, deformation unit Ⅰ1a and deformation unit Ⅱ1b. There are two deformation units Ⅰ1a symmetrically arranged on the left and right, and there is one deformation unit Ⅱ1b. The deformation units Ⅰ1a and Ⅱ1b are spaced apart from each other. The fluid flow balancing unit 1, the deformation unit Ⅰ1a and the deformation unit Ⅱ1b have the same height dimensions, and the width dimension ratio is 4:3:2. Fig.18 As shown, the fluid flows out along the 10 guide grooves 14 located outside the two sides of the inverted triangle, and the horizontal spacing is uniform, as shown in FIG. Fig.19 As shown, when finally assembled into a fluid flow equalization device, complete equal division can be achieved. In this embodiment, considering that the depth of the side of the guide groove 14 will affect the overall spacing size to a certain extent, when the width of the side of the guide groove 14 is X, the width of the deformation unit Ⅰ1a is increased by 0.5X, and the width of the deformation unit Ⅱ1b is increased by X.

[0050] A fluid flow balancing device comprises fluid flow balancing modules, wherein at least two groups of fluid flow balancing modules are arranged in a longitudinally staggered manner, wherein the symmetry axis of one group of fluid flow balancing modules is aligned with the side of the outermost fluid flow balancing unit of another group of fluid flow balancing modules.

[0051] According to the calculation, the distribution probability of a diversion module with 6 to 18 layers is as follows:

[0052]

[0053] Table 1

[0054] In this embodiment, a fluid flow distribution module with 12 layers is taken as an example, in which the top layer of the lower inverted triangle has 3 fewer fluid flow equalization units than the bottom layer of the upper trapezoid. Fig.11 As shown in FIG. 1 , the fluid entering the fluid flow distribution module from the middle of the two fluid flow equalization units at the top first flows through the left and right sides of the bottom layer of the upper trapezoid and the channel 3 inside the fluid flow equalization unit of the lower inverted triangle, and finally flows out through the guide grooves 14 on the outer sides of the two waists of the lower inverted triangle (the thick solid line in the figure is the flow path of the fluid in the fluid flow distribution module, and the dotted line is the path of the fluid flowing out of the fluid flow distribution module), and has the distribution rules shown in Table 1: The distribution probability from left to right is:

[0055] 0.015625 / 0.052734 / 0.082031 / 0.109375 / 0.123047 / 0.123047 / 0.123047 / 0.123047 / 0.123047 / 0.109375 / 0.082031 / 0.052734, characterized by a vertical axisymmetric probability distribution with less on the sides and more in the middle. When at least two groups of longitudinally staggered fluid flow diversion modules form a fluid flow equalization device, that is, Figure 12-16 as well as Fig.19 As shown, the overlapped part of the two groups of fluid diversion modules is the probability distribution shown in the following table:

[0056]

[0057] Table 2

[0058] In this embodiment, since the middle two columns of each group of fluid flow diversion modules will not overlap with the edge of another group of fluid flow diversion modules that cooperate with it to form a fluid flow equalization device, taking a fluid flow diversion module with 12 layers as an example, in which the top layer of the lower inverted triangle has 3 fewer fluid flow equalization units than the bottom layer of the upper trapezoid, when two groups of fluid flow equalization modules are superimposed, the fluid distribution probability of the overlapping part is (including the fluid flowing down the guide groove 14 near the overlapping area side of the last fluid flow equalization unit at the bottom of the inverted triangle in a single fluid flow diversion module, for example Fig.12 The fluid in the dashed part of a and g):

[0059] 0.123047 / 0.138672 / 0.162109 / 0.164062 / 0.162109 / 0.138672 / 0.123047.

[0060] The more layers the fluid flow diversion module has, the better the flow balancing effect of the fluid flow balancing device. Considering only the structure and effect, 18 layers are preferably used. The flow balancing effect of the fluid flow balancing device is: 0.098190308 / 0.100143 / 0.100433 / 0.100525 / 0.100708 / 0.100708 / 0.100525 / 0.100433 / 0.100143 / 0.098190308, and the equal division ratios are close to the same.

[0061] In order to improve the flow balancing effect, increase the one-time flow balancing, such as Fig.14 As shown, the fluid flow balancing modules are arranged in several groups side by side horizontally and in several groups staggered vertically. Several groups of fluid flow balancing modules are arranged side by side horizontally, that is, the fluid flow balancing units on both sides of the upper trapezoidal bottom layer are connected side by side, and several columns of fluid flow balancing modules are staggered vertically. Fig.18In the fluid flow diversion module shown, since it is necessary to keep the horizontal spacing of several guide grooves located on the outer sides of the two waists on the lower inverted triangle consistent when forming the fluid flow equalization device, when several groups of fluid flow equalization modules are arranged horizontally, the lowest layer of the upper trapezoidal structure needs to add half the width of the fluid flow equalization unit 1.

[0062] Specifically, the flow equalizing plate 11 of the fluid flow equalizing module has a total of 6 connection points 16 on the top and bottom sides, and the whole is connected and fixed to each other through the 6 connection points (because there are 2 flow equalizing plates 11 symmetrically, each flow equalizing plate 11 has 3 connection points), wherein, except for the fluid flow equalizing units on the outer sides of the upper trapezoidal top layer and the lower inverted triangle waists, the two connection points 16 on both sides of the bottom of the remaining fluid flow equalizing units are respectively connected to the top connection points 16 of the two fluid flow equalizing units of the next layer, wherein there will be the following between the flow equalizing plates 11: Figure 3 In order to prevent dust and fluid from entering and exiting the gap, a sealing piece Ⅰ2 is designed to overlap the gap in this embodiment. Fig.18 As shown, the gap formed by the deformation unit Ⅰ1a and the deformation unit Ⅱ1b is respectively blocked by the deformation sealing piece Ⅰ2a and the deformation sealing piece Ⅱ2b. Of course, all the flow equalizing plates 11 of the fluid diversion module can be a whole, or integrally formed, and only the guide plate 12 with the protrusion 13 and the recess Ⅰ15 is arranged between the two flow equalizing plates 11 in an axially symmetrical shape in the middle vertical direction with an upper trapezoid and a lower inverted triangle.

[0063] like Figure 15-19 As shown, in order to prevent the fluid from flowing in a parabola due to the influence of gravity when flowing out from the guide groove 14 on the outer side of the two waists of the lower inverted triangle, thereby affecting the flow balancing effect, the present invention also includes a fluid flow blocking device, which includes a plurality of baffles 41 arranged on the side edges of the guide groove 14 on the outer side of the two waists of the lower inverted triangle. The baffles 41 block the side edges of the guide groove 14 on the outer side of the two waists to prevent the fluid from being thrown out in a parabola, thereby ensuring the flow balancing effect. In this embodiment, a sealing piece II 42 is also provided on the top of the baffle 41, which fits the gap on the outer side of the two waists of the lower inverted triangle, so as to facilitate connection and fixation while blocking the gap of the fluid flow balancing unit on one side of the two waists of the lower inverted triangle to prevent dust and fluid from entering and exiting.

[0064] In order to ensure that the fluids in the overlapping area of ​​the fluid flow balancing device are merged and improve the flow balancing effect, the present invention also includes a fluid converging device, which includes a converging plate 51 arranged at the bottom of a plurality of baffles 41. In this embodiment, the bottoms of the plurality of baffles 41 are flush, and the converging plate 51 extends downwardly along one side of the baffle 41 to the other side. The two converging plates 51 of the overlapping parts of the two groups of fluid flow diversion modules arranged in an alternating manner enclose a converging groove 52. Specifically, as Fig.17As shown, the fluid baffle device and the fluid confluence device can be integrally formed. In this embodiment, the width of the baffle plate 41 is half the width of the fluid flow balancing unit (in order to ensure the integrity of the fluid flow balancing device after assembly, the width of the baffle plates 41 located in the middle and on both sides of the inverted triangle is slightly wider). The baffle plate 41 is away from the side of the guide groove 14 blocked by it, and a guide groove 43 for connecting to another channel 3 is provided. After a plurality of baffle plates 41 are combined, the lower inverted triangle becomes a rectangle, and the fluids on both sides of the overlapping part of the fluid flow balancing module are collected on one side through the confluence plate 51, which greatly improves the flow balancing effect. In this embodiment, as shown in FIG. Fig.17 As shown, the confluence plate 51 is integrally arranged with the bottom of several baffles 41, wherein a confluence hole 53 connected to the guide groove 43 is provided, and the confluence plate 51 is located between the two confluence holes 53 and is provided with a recess II 54 to prevent the viscous fluid from gathering or deflecting from the bottom of the confluence hole 53 to the middle of the bottom of the confluence plate 51, as shown in 18, wherein the bottom dotted line indicates the flow direction of the fluid in the confluence hole 53, wherein the bottom is provided with a recess II 54 to prevent the fluid from gathering to the confluence plate 51.

Claims

1. A fluid flow equalization device, characterized in that: It comprises fluid flow distribution modules, wherein at least two groups of fluid flow distribution modules are longitudinally staggered, wherein the symmetry axis of one group of fluid flow distribution modules is aligned with the side edge of the outermost fluid flow distribution unit of the other group of fluid flow distribution modules; The fluid blocking device also includes a fluid blocking device, which includes a plurality of blocking plates (41) arranged on the side edges of the guide grooves (14) outside the two waists of the lower inverted triangle, the blocking plates (41) blocking the side edges of the guide grooves (14) outside the two waists to prevent the fluid from being ejected in a parabola; The fluid flow distribution module includes fluid flow balancing units, which are connected and fixed to each other to form an axisymmetric figure in the vertical direction with a trapezoidal upper portion and an inverted triangle lower portion. The upper trapezoid is provided with several layers, and the top layer is provided with at least 2 fluid flow balancing units, and each layer below has one more fluid flow balancing unit than the previous layer, and the top layer of the lower inverted triangle has one or three less fluid flow balancing units than the bottom layer of the upper trapezoid, and each layer below has one less fluid flow balancing unit than the previous layer; The fluid flow balancing unit comprises two flow balancing plates (11) and a guide plate (12) located between the two flow balancing plates (11); a protrusion (13) for balancing the flow of a single fluid is provided on the upper portion of the guide plate (12); the upper portion and the side portion of the flow balancing plate (11) protrude from the guide plate (12); the protrusion and the guide plate (12) form a guide groove (14) through which the fluid passes.

2. The fluid flow equalization device according to claim 1, characterized in that: The slopes of the two sides of the top of the protrusion (13) are consistent.

3. The fluid flow equalization device according to claim 2, characterized in that: The guide groove (14) is a straight groove or a wave groove.

4. The fluid flow equalization device according to any one of claims 1 to 3, characterized in that: The bottom of the guide plate (12) is provided with a recess I (15).

5. The fluid flow equalization device according to claim 1, characterized in that: The horizontal spacing of the plurality of guide grooves (14) located outside the two waists of the lower inverted triangle is consistent.

6. The fluid flow equalization device according to claim 1, characterized in that: The fluid flow equalization modules are arranged in a plurality of groups in parallel in the transverse direction and in a plurality of groups in a staggered arrangement in the longitudinal direction.

7. The fluid flow equalization device according to claim 1, characterized in that: It also comprises a fluid confluence device, the fluid confluence device comprising a confluence plate (51) arranged at the bottom of a plurality of baffle plates (41), the bottoms of the plurality of baffle plates (41) being flush, the confluence plate (51) extending obliquely downward from one side of the baffle plate (41) to the other side, and two confluence plates (51) at the overlapping parts of two groups of fluid flow diversion modules arranged in an alternating manner enclosing a confluence groove (52).

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