CN215170597U - Pump unit - Google Patents

Abstract

The utility model provides a pump package, include: the liquid pump comprises a base, at least two pumps, a liquid inlet main pipe, a liquid outlet main pipe, a plurality of branch pipelines and at least one flow guide partition plate. Wherein, at least two pumps are arranged on the base. And at least two pumps are connected in parallel between the liquid inlet main pipe and the liquid outlet main pipe by a plurality of branch pipelines. The two ends of each branch pipeline are respectively connected with the liquid inlet main pipe and the liquid outlet main pipe through arc-shaped connecting parts, the bending radius of each arc-shaped connecting part is R1, the diameter of an opening at the end part of each arc-shaped connecting part is D, and R1 is more than or equal to 1.5D and less than or equal to 2.5D; at least one diversion baffle is arranged in the arc-shaped connecting part to divide the interior of the arc-shaped connecting part into a plurality of diversion channels. The utility model discloses a pump package can effectively reduce loss of pressure, improves the turbulent condition, makes rivers carry more stably.

Description

Pump unit

Technical Field

The utility model relates to a pump unit equipment especially relates to a pump package.

Background

In the water delivery process of the pump unit in the prior art, the branch pipes are respectively connected with the liquid inlet main pipe and the liquid outlet main pipe, so that water flows from the liquid inlet main pipe to the liquid outlet main pipe through the branch pipes, and then is conveyed to a water consumption area. However, in the actual water delivery process, the joints between the branch pipes and the liquid inlet main pipe and the liquid outlet main pipe in the prior art are easy to generate large pressure loss, and then turbulence is easy to generate, so that the stability of water delivery is affected.

For example, chinese patent with publication number CN211230745U discloses a detachable module device of air conditioner pump package, including steel braced frame, pump and total pipeline, steel braced frame includes shaped steel square base, stand and shaped steel square roof, the stand sets up in the four corners department of shaped steel square base and shaped steel square roof, the stand bottom is articulated with shaped steel square base, stand top and bottom are respectively through the fixed connection of floor and shaped steel square base and shaped steel square roof, the last pump connecting plate that has set gradually of shaped steel square base, the pump mount, the pump sets up on the pump mount, the free end of the total pipeline of feed liquor on the pump and the total pipeline of play liquid is connected with two total pipelines of arranging side by side respectively, two total pipelines are fixed in on the shaped steel square roof. The liquid inlet main pipe, the liquid outlet main pipe and the branch pipes are connected in a T shape, and pressure loss at the connection parts of the branch pipes, the liquid inlet main pipe and the liquid outlet main pipe is large during water delivery.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a can reduce loss of pressure's prefabricated pump package at water delivery in-process.

To achieve the above object, according to one aspect of the present invention, there is provided a pump unit including: the liquid pump comprises a base, at least two pumps, a liquid inlet main pipe, a liquid outlet main pipe, a plurality of branch pipelines and at least one flow guide partition plate. Wherein, at least two pumps are arranged on the base; a plurality of branch pipelines connect the at least two pumps in parallel between the liquid inlet main pipe and the liquid outlet main pipe; the two ends of each branch pipeline are respectively connected with the liquid inlet main pipe and the liquid outlet main pipe through arc-shaped connecting parts, the bending radius of each arc-shaped connecting part is R1, the diameter of an opening at the end part of each arc-shaped connecting part is D, and R1 is more than or equal to 1.5D and less than or equal to 2.5D; at least one flow guide partition plate is arranged in the arc-shaped connecting part and divides the arc-shaped connecting part into a plurality of flow guide channels.

According to the utility model discloses an exemplary embodiment, branch pipeline connect perpendicularly in the feed liquor house steward with go out the liquid house steward, arc connecting portion are 90 elbows.

According to an exemplary embodiment of the present invention, the baffle has a first edge and a second edge extending in a first direction, the first edge and the second edge being opposite in a second direction, the baffle being curved from the first edge to the second edge; wherein the first direction is perpendicular to the second direction.

According to an exemplary embodiment of the present invention, the bending radius of the baffle is R2, and R2 is R1.

According to an exemplary embodiment of the present invention, the arc connection portion includes a first arc connection portion connected to the liquid inlet header pipe; the flow guide partition plate comprises a first flow guide partition plate, and the first flow guide partition plate is arranged in the first arc-shaped connecting part; the first edge of the first flow guide partition plate is in a circular arc shape which is sunken towards the second edge of the first flow guide partition plate, and the curvature of the first edge is the same as that of the inner wall surface of the liquid inlet header pipe; the second edge of the first flow guide partition plate is flush with the end face, far away from the opening of the liquid inlet header pipe, of the first arc-shaped connecting part; the tangent line of any point on the second edge of the first flow guide partition plate is perpendicular to the end face, far away from the opening of the liquid inlet header pipe, of the first arc-shaped connecting part.

According to an exemplary embodiment of the present invention, the arc-shaped connecting portion includes a second arc-shaped connecting portion connected to the liquid outlet header pipe; the flow guide partition plate comprises a second flow guide partition plate, and the second flow guide partition plate is arranged in the second arc-shaped connecting part; the first edge of the second flow guide partition plate is in a circular arc shape which is sunken towards the second edge of the second flow guide partition plate, and the curvature of the first edge is the same as that of the inner wall surface of the liquid outlet header pipe; the second edge of the second flow guide partition plate is flush with the end face, far away from the opening of the liquid outlet main pipe, of the second arc-shaped connecting part; and the tangent line of any point on the second edge of the second flow guide partition plate is perpendicular to the end surface, far away from the opening of the liquid outlet header pipe, of the second arc-shaped connecting part.

According to an exemplary embodiment of the present invention, the baffle plate has a dividing line, the dividing line is parallel to the second edge, the dividing line is D/2 of the distance between the second edge and the dividing line in the second direction, the portion of the baffle plate between the dividing line and the second edge is a wedge portion, and the thickness of the wedge portion is gradually reduced from the dividing line to the second edge.

According to an exemplary embodiment of the invention, the wedge portion is curved from the dividing line to the second edge.

According to an exemplary embodiment of the present invention, the thickness of the baffle is Z, Z is less than or equal to 10 mm.

According to the utility model discloses an exemplary embodiment, the quantity of flow guide baffle is 2 ~ 5, and flow guide baffle evenly locates in the arc connecting portion.

According to the above technical scheme, the utility model discloses possess at least one in following advantage and the positive effect:

the utility model discloses a pump package, be connected with the feed liquor house steward and play liquid house steward through arc connecting portion respectively at a pipeline both ends, and the bending radius R1 of arc connecting portion designs for 1.5D rather than open-ended terminal surface diameter D and is less than or equal to R1 and is less than or equal to 2.5D, can realize in the transportation process of rivers, reduce at a pipeline and feed liquor house steward, the pipeline and the loss of pressure of play liquid house steward's junction, and simultaneously, set up the water conservancy diversion baffle in the arc connecting portion, form a plurality of water conservancy diversion passageways, can further reduce loss of pressure, improve the turbulent condition, make rivers carry more stable.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Figure 1 is a schematic perspective side view of a pump group according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating the connection of branch pipes, arcuate connections and inlet manifolds, according to an exemplary embodiment;

FIG. 3 is a schematic cross-sectional view of an arcuate junction and inlet header shown in accordance with an exemplary embodiment;

FIG. 4 is a schematic cross-sectional view of another angle of the arcuate connection and the inlet header shown in accordance with an exemplary embodiment;

FIG. 5 is a schematic view of a baffle plate shown disposed in an arcuate joint according to an exemplary embodiment;

FIG. 6 is a schematic view of a diaphragm shown in accordance with an exemplary embodiment;

FIG. 7 is a side schematic view of a diaphragm according to an exemplary embodiment;

FIG. 8 is a simulation diagram of the flow field of the water flow of the inlet header and branch pipes in T-shaped connection in the prior art;

FIG. 9 is another prior art flow field simulation of the flow of a T-junction inlet manifold and branch pipe;

FIG. 10 is another prior art flow field simulation of the flow of a T-junction inlet manifold and branch pipe;

FIG. 11 is a diagram illustrating a flow field simulation of the flow of the inlet manifold to the arcuate junction, according to an exemplary embodiment;

FIG. 12 is another flow field simulation of the flow of the inlet header, arcuate connection and branch pipes according to an exemplary embodiment;

FIG. 13 is another flow field simulation of the flow of the inlet header, arcuate connection and branch pipes according to an exemplary embodiment;

FIG. 14 is a flow field simulation of a water flow having baffles in arcuate junctions according to an exemplary embodiment;

FIG. 15 is a flow field simulation of a water flow having baffles in arcuate junctions according to an exemplary embodiment;

FIG. 16 is a flow field simulation of a water flow having baffles in arcuate junctions according to an exemplary embodiment;

FIG. 17 is a flow field simulation of water flow without baffles in the arcuate junctions, according to an exemplary embodiment;

FIG. 18 is a flow field simulation of a water stream having baffles in arcuate junctions according to an exemplary embodiment;

fig. 19 is a flow field simulation diagram illustrating water flow without a baffle plate in an arc-shaped connection portion according to an exemplary embodiment.

Description of reference numerals:

1. a base; 11. a rectangular frame 12, a support plate; 13. a forklift hole; 2. a pump; 3. a liquid inlet header pipe; 4. a branch pipeline; 5. an arc-shaped connecting part; 51. an end face of the opening; 6. a flow guide clapboard; 60. a wedge portion; 61. a first edge; 62. a second edge; 63. a boundary line; 64. a third edge; 65. a fourth edge; f1, first direction; f2, second direction; r1, radius of curvature of the arcuate connection; r2, bending radius of the guide baffle; D. the diameter of the end opening; z, the thickness of the guide partition plate; l1, mean arc; s1, a suction surface; s2, pressing surface; A. any point on the second edge; l2, tangent line.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

In the following description of various exemplary embodiments of the disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration various exemplary structures in which aspects of the disclosure may be practiced. A system and a step. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the disclosure, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this disclosure. Furthermore, the terms "first," "second," and the like in the claims are used merely as labels, and are not numerical limitations of their objects.

The embodiment of the utility model provides a pump unit, as shown in fig. 1 to 19, wherein, fig. 1 shows the overall structure schematic diagram of the pump unit; fig. 2 to 5 show the connection of the branch pipe 4, the arc-shaped connecting part 5 and the inlet header pipe 3; fig. 6 to 7 show a schematic structural view of the diaphragm 6;

fig. 8 to 10 are flow field simulation diagrams of the junction between the inlet manifold 3 and the branch pipes in the prior art, and fig. 11 to 19 are flow field simulation diagrams of the junction between the middle arc-shaped connecting portion 5 and the inlet manifold 3 in the present invention. As shown in fig. 1 to 7, the pump unit according to the embodiment of the present invention includes: the device comprises a base 1, at least two pumps 2, a liquid inlet main pipe 3, a liquid outlet main pipe (not shown in the figure), a plurality of branch pipelines 4 and at least one flow guide clapboard 6. Wherein, at least two pumps 2 are arranged on the base 1. A plurality of branch pipes 4 connect at least two pumps 2 in parallel between the inlet manifold 3 and the outlet manifold. Wherein, the two ends of each branch pipeline 4 are respectively connected with the liquid inlet header pipe 3 and the liquid outlet header pipe through an arc-shaped connecting part 5, the bending radius of the arc-shaped connecting part 5 is R1, the diameter of the end opening of the arc-shaped connecting part 5 is D, and R1 is not less than 1.5D and not more than 2.5D. At least one flow guide partition plate 6 is arranged in the arc-shaped connecting part 5 to divide the interior of the arc-shaped connecting part 5 into a plurality of flow guide channels.

The utility model discloses a pump package, 4 both ends are connected with feed liquor house steward 3 and play liquid house steward through arc connecting portion 5 respectively in branch pipeline, and the bending radius R1 of arc connecting portion 5 is 1.5D and R1 is less than or equal to 2.5D rather than the diameter D design of open-ended terminal surface 51, can realize in the transportation process of rivers, reduce branch pipeline 4 and feed liquor house steward 3, branch pipeline 4 and the loss of pressure of the junction of play liquid house steward, and simultaneously, set up water conservancy diversion baffle 6 in arc connecting portion 5, form a plurality of water conservancy diversion passageways, can further reduce loss of pressure, improve the turbulent condition, make the rivers carry more stable.

It should be noted that the liquid inlet header pipe 3 and the liquid outlet header pipe can be arranged in parallel, the heights of the liquid inlet header pipe 3 and the liquid outlet header pipe can be the same or different, the connection mode of the liquid inlet header pipe 3 and the arc-shaped connection part 5 is the same as that of the liquid outlet header pipe and the arc-shaped connection part 5, and water flows into the liquid inlet header pipe 3 of the pump set from an external water source, flows into the arc-shaped connection part 5 connected with the liquid outlet header pipe through the arc-shaped connection part 5 and the branch pipeline 4, then flows into the liquid outlet header pipe, and then flows out to enable the water to be conveyed to a water using area.

The pump unit according to the embodiment of the present invention will be described in detail below.

As shown in fig. 1, the base 1 of the pump unit can be a rectangular frame 11, for example made of steel sections, placed on the ground. The rectangular frame 11 is provided with a support plate 12, and the support plate 12 is used for bearing the branch pipeline 4, the liquid inlet header pipe 3 and the liquid outlet header pipe. In addition, the lateral wall of the rectangular frame 11 is provided with at least two forklift holes 13, and when the pump unit is moved by a forklift, the fork of the forklift is inserted into the forklift holes 13, so that the pump unit is moved and transported.

Further, as shown in fig. 1 and 2, the branch pipe 4 is vertically connected to the inlet header pipe 3 and the outlet header pipe. The arc-shaped connecting part 5 can be an elbow, i.e. an arc-shaped bent connecting pipe, and is connected between the liquid inlet main pipe 3 and the branch pipe 4 and between the liquid outlet main pipe and the branch pipe 4. Because branch pipeline 4 and inlet manifold 3 and play liquid house steward are connected perpendicularly respectively, flow direction branch pipeline 4 from inlet manifold 3 flow direction to rivers to when flowing into out the liquid house steward from branch pipeline 4, 90 turn to can take place for the rivers flow direction, take place to strike easily and arouse the turbulent flow, form the swirl, make the water delivery of pump sled unstable. And the impact action of the water flow can be reduced through the steering action of the arc-shaped connecting part 5, and the turbulence is avoided.

In some embodiments, the arc-shaped connecting portion 5 is a 90 ° elbow, that is, the central lines of the two openings of the arc-shaped connecting portion 5 are perpendicular to each other, the 90 ° elbow can guide the direction of the water flow to change by 90 °, for example, the water flow flows into the liquid outlet header pipe from the arc-shaped connecting portion 5, when the water flow is in the branch pipe 4, the flow direction of the water flow is perpendicular to the liquid outlet header pipe, after passing through the arc-shaped connecting portion 5, when entering the liquid outlet header pipe, the flow direction of the water flow can be parallel to the extending direction of the liquid outlet header pipe, therefore, the 90 ° elbow plays a role in buffering the turning of the water flow to the greatest extent, the impact of the water flow is avoided, the water flow also has the same effect when flowing into the branch pipe 4 from the liquid inlet header pipe 3, and the description is omitted here. Of course, the arc-shaped connecting portion 5 may also be a 30 °, 60 °, 70 °, 80 ° elbow, and those skilled in the art may select the connecting portion according to the actual situation, and the connecting portion is not particularly limited herein.

The two ends of the arc-shaped connecting part 5 are provided with openings, wherein the opening at one end is connected with the liquid inlet main pipe 3 or the liquid outlet main pipe, and the opening at the other end is connected with the branch pipeline 4. The diameters of the pipe bodies of the arc-shaped connecting parts 5 are the same, and the diameters of the arc-shaped connecting parts 5 are the same as those of the branch pipes 4, so that the sealing connection between the two parts is realized. As shown in fig. 2 and 5, the diameter of the end opening of the arc-shaped connecting part 5 is D, the bending radius of the arc-shaped connecting part 5 is R1, and the size is designed to be 1.5D or more and R1 or more and 2.5D or less, so that the flow separation and the swirl of the fluid flowing into the branch pipe 4 from the inlet main pipe 3 or flowing into the outlet main pipe from the branch pipe 4 can be effectively reduced, and the pressure loss of the water flow is reduced. Preferably, 1.5D ≦ R1 ≦ 2D, for example R1 may equal 1.6D, 1.8D, 2D, and is not particularly limited herein.

Further, as shown in fig. 6 and 7, the baffle plate 6 has a plate body having a first edge 61 and a second edge 62 extending in the first direction F1, the first edge 61 and the second edge 62 being opposite to each other in the second direction F2, the plate body being curved from the first edge 61 to the second edge 62. Wherein the first direction F1 is perpendicular to the second direction F2.

Specifically, as shown in fig. 3 to 5, the first edge 61 is located at one end of the arc-shaped connecting portion 5 close to the inlet header pipe 3 or the outlet header pipe, and the second edge 62 is located at one end of the arc-shaped connecting portion 5 connected to the branch pipe 4. When arc connecting portion 5 is connected between inlet manifold 3 and branch pipeline 4, rivers flow to second edge 62 along the arc plate body from the first edge 61 of water conservancy diversion baffle 6, then flow into branch pipeline 4, at this moment, the free end that is close to inlet manifold 3 of definition water conservancy diversion baffle 6 is water conservancy diversion baffle leading edge (trailing edge), first edge 61 at this moment promptly is the water conservancy diversion baffle leading edge, the free end of keeping away from inlet manifold 3 is water conservancy diversion baffle trailing edge (trailing edge), second edge 62 at this moment is the water conservancy diversion baffle trailing edge. When flowing into the branch pipeline 4 from the inlet header 3, the water flow enters the diversion channel through the front edge of the diversion partition plate and then flows into the branch pipeline 4 along with the tail edge of the diversion partition plate.

When the arc-shaped connecting part 5 is connected between the liquid outlet main pipe and the branch pipe 4, the water flows from the second edge 62 of the flow guide clapboard 6 to the first edge 61 along the arc-shaped plate body and then flows into the liquid outlet main pipe. At this time, the free end of the baffle 6 far from the liquid outlet main pipe is defined as a leading edge (leading edge), that is, the second edge 62 is the leading edge of the baffle, the free end close to the liquid outlet main pipe is a trailing edge (trailing edge), that is, the first edge 61 is the trailing edge of the baffle. When water flows into the liquid outlet main pipe from the branch pipe 4, the water flows into the flow guide channel through the front edge of the flow guide partition plate and then flows into the liquid outlet main pipe along with the tail edge of the flow guide partition plate.

The second direction F2 is understood to be the direction of extension of the branch line 4, i.e. the direction of flow of the water in the branch line 4. The arc of plate body roughly is C shape, and the plate body is designed for the streamlined promptly, through setting up above-mentioned arc plate body, can be with separating into a plurality of streamlined water conservancy diversion passageways in the arc connecting portion 5, is favorable to the direction of turning to the guide of rivers, reduces the resistance, and then reduces loss of pressure, avoids turbulent production.

Further, as shown in fig. 5, the curvature radius of the baffle plate 6 is R2, and R2 is R1, that is, the curvature radius of the baffle plate 6 is the same as the curvature radius of the arc-shaped connecting portion 5. So design for the radian of the bending of the plate body of the diversion baffle plate 6 is the same as the radian of the bending of the arc-shaped connecting part 5, and the size of each diversion channel is further uniform, thereby being beneficial to the flow of water flow.

Further, R2 — R1 — 2D, that is, the bending radii of the baffle plate 6 and the arc-shaped connecting portion 5 are respectively equal to 2 times of the diameter of the end opening of the arc-shaped connecting portion 5, that is, equal to 2 times of the diameter of the branch pipe 4, and according to the flow field simulation analysis, the pressure loss of the water flow in the arc-shaped connecting portion 5 is most obviously reduced in the design.

Further, as shown in fig. 3 to 5, since the arc-shaped connecting portions 5 are respectively connected between the liquid inlet header pipe 3 and the branch pipe 4 and between the liquid outlet header pipe and the branch pipe 4, in order to distinguish the arc-shaped connecting portions, the connecting portions connected between the liquid inlet header pipe 3 and the branch pipe 4 are named as first arc-shaped connecting portions, the flow guide partition plates 6 arranged on the first arc-shaped connecting portions are named as first flow guide partition plates, the connecting portions connected between the liquid outlet header pipe and the branch pipe 4 are named as second arc-shaped connecting portions, and the flow guide partition plates 6 arranged on the second arc-shaped connecting portions are named as second flow guide partition plates.

As shown in fig. 4 and 6, the first edge of the first baffle plate is in the shape of a circular arc recessed toward the second edge 62 of the first baffle plate, and the curvature of the first edge is the same as that of the inner wall surface of the inlet header pipe 3. The first edge of first water conservancy diversion baffle promptly can with the internal face smooth connection of feed liquor house steward 3, consequently, can realize the at utmost water conservancy diversion of first water conservancy diversion baffle to rivers to can not influence the flow of the inside rivers of feed liquor house steward 3.

As shown in fig. 5, the second edge 62 of the first baffle is flush with the end surface 51 of the first arc-shaped connecting part far from the opening of the inlet header 3, and a tangent L2 of any point a on the second edge 62 of the first baffle is perpendicular to the end surface 51 of the first arc-shaped connecting part far from the opening of the inlet header 3. This open-ended terminal surface 51 can understand the open-ended of first arc connecting portion and the open-ended of branch pipeline 4 and be connected the face, consequently, after rivers enter into first arc connecting portion, alright in order to be by the water conservancy diversion of flow guide partition board 6, when rivers flow out first arc connecting portion and enter into branch pipeline 4, rivers direction is the same with the extending direction of branch pipeline 4, has avoided the impact of rivers to the lateral wall of branch pipeline 4, has improved the utilization ratio of water conservancy diversion partition board 6 simultaneously.

The first edge of the second flow guide partition plate is in a circular arc shape which is sunken towards the second edge 62 of the second flow guide partition plate, and the curvature of the first edge is the same as that of the inner wall surface of the liquid outlet header pipe. The second edge 62 of the second baffle is flush with the end face of the second arc-shaped connecting part far away from the liquid outlet header pipe, and the tangent of any point on the second edge of the second baffle is perpendicular to the end face of the second arc-shaped connecting part far away from the opening of the liquid inlet header pipe 3. The effect is the same as the first baffle plate, and is not described again here.

It should be noted that the arc-shaped connecting portion 5 may be a separate component, and is connected to the branch pipe 4, and the arc-shaped connecting portion 5 may also be integrally formed with the branch pipe 4, that is, the end surface of the opening of the arc-shaped connecting portion 5 does not necessarily exist actually, and this end surface may be understood as a boundary that distinguishes the arc-shaped connecting portion 5 and the branch pipe 4.

Further, as shown in fig. 6 and 7, the baffle plate 6 has a boundary line 63, the boundary line 63 is parallel to the second edge 62, the distance between the boundary line 63 and the second edge 62 is D/2 in the second direction F2, the portion between the boundary line 63 and the second edge 62 is the wedge portion 60, and the thickness of the wedge portion 60 gradually decreases from the boundary line 63 to the second edge 62. When rivers flow into branch pipeline 4 from inlet manifold 3, rivers flow into the water conservancy diversion passageway of arc kink 5 from inlet manifold 3, before rivers get into branch pipeline 4, because the thickness of wedge portion 60 of water conservancy diversion baffle 6 reduces from boundary line 63 to second edge 62 gradually, accord with the fluid design, consequently, rivers in each water conservancy diversion passageway can link up as an organic whole rapidly when getting into branch pipeline 4, avoid between the rivers in each water conservancy diversion passageway owing to have the gap and take place to strike and then lead to producing the swirl. When water flow enters the liquid outlet main pipe from the branch pipe 4, the water flow can enter the flow guide channel of the arc-shaped connecting part 5 along the flow guide partition plate 6, and the thickness of the wedge-shaped part 60 of the flow guide partition plate 6 is gradually increased from the second edge 62 to the boundary 63, so that the flow guide partition plate conforms to the fluid design, the resistance of the water flow can be reduced, the impact of the water flow and the second edge 62 of the flow guide partition plate 6 is reduced, and the tail part of the flow guide partition plate 6 is prevented from flowing and separating to generate vortex.

The thickness of the baffle 6 may be the same from the dividing line 63 to the first edge 61 to ensure the same size of the flow guide channels.

Furthermore, the thickness of the flow guiding clapboard 6 is Z, Z is less than or equal to 10mm, for example, Z can be 2 mm. 3mm, 4mm, 5mm, 6mm, 7mm or 8mm, under the prerequisite of guaranteeing intensity, the thickness of flow guide partition 6 is the better less.

Further, the bending radius R of the baffle plate 6 is specifically the bending radius of the camber line L of the baffle plate 6. Referring to fig. 5, which shows a schematic side view of the diaphragm 6, the diaphragm 6 includes opposite suction and pressure surfaces S1 and S2, and the mean camber line L is the mean camber line of the diaphragm 6, which is spaced from the suction and pressure surfaces S1 and S2 by the same distance Z/2. The part from the boundary line 63 to the second edge 62 of the baffle 6 is a wedge 60, and the wedge 60 is arc-shaped from the boundary line 63 to the second edge 62, that is, two opposite surfaces of the wedge 60 are also arc-shaped surfaces, and the two arc-shaped surfaces are respectively connected with the pressure surface S2 and the suction surface S1 smoothly.

Further, the number of the flow guide partition plates 6 can be 2-5, and the flow guide partition plates are evenly arranged in the arc-shaped connecting portion 5. The arc-shaped plate body of the baffle 6 further comprises a third edge 64 and a fourth edge 65, the third edge 64 and the fourth edge 65 are opposite to each other in the first direction F1, and the third edge 64 and the fourth edge 65 are respectively connected with the inner wall of the arc-shaped connecting part 5 so as to fixedly connect the baffle 6 in the arc-shaped connecting part 5.

The following explains the simulation of the flow field of the inlet header pipe 3, the arc-shaped bent part and the branch pipe 4 of the embodiment of the utility model.

As shown in fig. 8 to fig. 10, which respectively show simulation diagrams of water flows of a T-shaped connected inlet main pipe and a branch pipe in the prior art, it can be known from the diagrams that after a fluid enters the branch pipe from the inlet main pipe, flow split is obvious, backflow vortex occurs on one side of the branch pipe, and a jet phenomenon occurs on the other side of the branch pipe, so that a flow field is very unevenly distributed after the fluid enters the branch pipe, and flow loss is large.

As shown in fig. 11 to 13, they respectively show the flow field simulation diagrams of the water flows of the inlet header 3, the arc-shaped connecting portion 5 and the branch pipes 4, wherein the baffle 6 is not disposed in the arc-shaped connecting portion 5. It can be known from the figure that the arc-shaped connecting part 5 is arranged between the liquid inlet header pipe 3 and the branch pipeline 4, and after the fluid enters the branch pipeline 4 from the liquid inlet header pipe 3, the flow separation phenomenon does not occur, although a certain jet phenomenon still exists, compared with the T-shaped connection, the flow field is more uniform, and the flow loss is less.

According to the simulation effect diagram, when three pumps 2 are arranged in parallel in the pump group, the pressure loss of the T-shaped connected pipeline in fig. 8 to 10 is 3.3m, and the pressure loss of the arc-shaped connected pipeline in fig. 11 to 13 is 2.8m, that is, the pressure loss of the pipeline provided with the arc-shaped connecting part 5 is 0.5m less than that of the T-shaped connected pipeline (m represents meter, that is, head, and one atmosphere corresponds to 10m head), which further illustrates that the pressure loss of the pipeline is less by using the arc-shaped connecting part 5.

With further reference to fig. 14 to 16, flow field simulation diagrams of the water flows of the middle inlet header 3, the arc-shaped connecting portion 5 and the branch pipes 4 of the present invention are respectively shown, wherein the flow guiding partition plate 6 in the above-mentioned embodiment is disposed in the arc-shaped connecting portion 5. Fig. 17 to 19 respectively show the water flow field simulation diagrams of the inlet header 3, the arc-shaped connecting portion 5 and the branch pipe 4 according to another embodiment of the present invention, wherein the baffle plate 6 of the above embodiment is not disposed in the arc-shaped connecting portion 5. Comparing the two sets of simulation results, it can be known that, compared with the case that the flow guiding partition plate 6 is not arranged in the arc connecting part 5, the flow velocity distribution is more uniform, and the flow field of the water flowing out of the arc connecting part 5 after entering the straight pipe section is also more uniform, and no jet flow is generated, through actual measurement, the pressure loss of the tee joint part provided with the arc bending part of the partition plate in fig. 14 to 16 is 3689Pa, and the pressure loss of the tee joint part not provided with the arc bending part of the partition plate in fig. 17 to 19 is 3098Pa, the tee joint pressure loss provided with the partition plate is reduced by 16% compared with the pressure loss not provided with the partition plate. Therefore, the arc-shaped connecting part 5 provided with the flow guide partition plate 6 provides better inflow conditions for the pump 2 connected in the branch pipeline 4, and improves the operation efficiency of the pump and the pump set system.

Please refer to the following table, which is a comparison of different connection modes between the inlet main pipe or the outlet main pipe and the branch pipe:

watch 1

Phenomenon(s)	T-shaped connection	Arc-shaped connecting part	Arc connecting part and flow guide partition plate
				Return vortex	Is provided with	Is free of	Is free of
Jet phenomenon (non-uniform flow)	Is provided with	Is (smaller)	Is free of

In summary, compared with the T-shaped connection (fig. 8-10) in the prior art, the connection mode (fig. 14-16) with the arc-shaped connection part and the flow-guiding partition plate can effectively reduce the backflow vortex at the connection part of the branch pipeline 4 and the inlet main pipe 3 or the outlet main pipe, and can also improve the non-uniformity of the flow field caused by the jet phenomenon, thereby reducing the pressure loss of the flow field.

To sum up, the utility model discloses a pump package, 4 both ends are connected with feed liquor house steward 3 and play liquid house steward through arc connecting portion 5 respectively at branch pipeline, and the bending radius R1 of arc connecting portion 5 is 1.5D and R1 is less than or equal to 2.5D rather than open-ended terminal surface 51 diameter D design, can realize in the transportation process of rivers, reduce at branch pipeline 4 and feed liquor house steward 3, branch pipeline 4 and the loss of pressure of play liquid house steward's junction, and simultaneously, set up water conservancy diversion baffle 6 in arc connecting portion 5, form a plurality of water conservancy diversion passageways, can further reduce loss of pressure, improve the turbulent condition, make the rivers carry more stably.

It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the description. The present invention is capable of other embodiments and of being practiced and carried out in a variety of ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments set forth herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention.

Claims (10)

1. A pump group, characterized in that it comprises:

a base (1);

at least two pumps (2) arranged on the base (1);

a liquid inlet main pipe (3) and a liquid outlet main pipe;

a plurality of branch pipes (4) connecting the at least two pumps (2) in parallel between the liquid inlet main pipe (3) and the liquid outlet main pipe; the two ends of each branch pipeline (4) are respectively connected with the liquid inlet main pipe (3) and the liquid outlet main pipe through arc-shaped connecting parts (5), the bending radius of each arc-shaped connecting part (5) is R1, the diameter of an opening at the end part of each arc-shaped connecting part (5) is D, and R1 is more than or equal to 1.5D and less than or equal to 2.5D; and

and the at least one flow guide partition plate (6) is arranged in the arc-shaped connecting part (5) and divides the inside of the arc-shaped connecting part (5) into a plurality of flow guide channels.

2. Pump according to claim 1, characterized in that the branch pipes (4) are connected perpendicularly to the inlet header (3) and to the outlet header, the curved connection (5) being a 90 ° bend.

3. Pump group according to claim 1, characterized in that the deflector baffle (6) has a first edge (61) and a second edge (62) extending along a first direction (F1), the first edge (61) and the second edge (62) being opposite in a second direction (F2), the deflector baffle (6) being arched from the first edge (61) to the second edge (62);

wherein the first direction (F1) is perpendicular to the second direction (F2).

4. Pump group according to claim 3, characterized in that the baffle (6) has a radius of curvature R2, R2 ═ R1.

5. Pump group according to claim 3,

the arc-shaped connecting part (5) comprises a first arc-shaped connecting part and is connected with the liquid inlet header pipe (3);

the flow guide partition plate (6) comprises a first flow guide partition plate, and the first flow guide partition plate is arranged in the first arc-shaped connecting part; wherein the content of the first and second substances,

the first edge of the first flow guide partition plate is in a circular arc shape which is sunken towards the second edge of the first flow guide partition plate, and the curvature of the first edge is the same as that of the inner wall surface of the liquid inlet header pipe (3);

the second edge of the first flow guide partition plate is flush with the end surface (51) of the first arc-shaped connecting part, which is far away from the opening of the liquid inlet main pipe (3);

the tangent line of any point on the second edge of the first flow guide partition plate is perpendicular to the end face (51) of the first arc-shaped connecting part, which is far away from the opening of the liquid inlet header pipe (3).

6. Pump group according to any of claims 3 to 5,

the arc-shaped connecting part (5) comprises a second arc-shaped connecting part and is connected with the liquid outlet main pipe;

the flow guide partition plate (6) comprises a second flow guide partition plate, and the second flow guide partition plate is arranged in the second arc-shaped connecting part; wherein the content of the first and second substances,

the first edge of the second flow guide partition plate is in a circular arc shape which is sunken towards the second edge of the second flow guide partition plate, and the curvature of the first edge is the same as that of the inner wall surface of the liquid outlet header pipe;

the second edge of the second flow guide partition plate is flush with the end face (51) of the second arc-shaped connecting part, which is far away from the opening of the liquid outlet main pipe;

and the tangent line of any point on the second edge of the second flow guide partition plate is perpendicular to the end surface, far away from the opening of the liquid outlet header pipe, of the second arc-shaped connecting part.

7. Pump group according to claim 3, characterized in that the diaphragm (6) has a dividing line (63) on it, the dividing line (63) being parallel to the second edge (62), the distance between the dividing line (63) and the second edge (62) being D/2 in the second direction (F2), the portion of the diaphragm (6) between the dividing line (63) and the second edge (62) being a wedge (60), the thickness of the wedge (60) decreasing from the dividing line (63) to the second edge (62).

8. Pump group according to claim 7, characterized in that the wedge-shaped part (60) is curved from the dividing line (63) to the second edge (62).

9. Pump group according to claim 3, characterized in that the guide baffles (6) have a thickness Z, Z ≦ 10 mm.

10. Pump group according to claim 3, characterized in that the number of baffle plates (6) is 2-5 and the baffle plates (6) are uniformly arranged in the arc-shaped connection part (5).

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