CN113818550A

CN113818550A - Pump station

Info

Publication number: CN113818550A
Application number: CN202010559101.8A
Authority: CN
Inventors: 杨志勇; 周正; 黄奇锋; 曹杨华
Original assignee: Grundfos Holdings AS
Current assignee: Grundfos Holdings AS
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-12-21
Anticipated expiration: 2040-06-18
Also published as: CN113818550B

Abstract

The invention provides a pump station, which comprises a pump station body, wherein the pump station body comprises: diapire and the periphery wall of locating on the diapire are equipped with the inlet on the periphery wall, and the pump station still includes: the guide plate is arranged in the pump station body, the guide plate is positioned below the liquid inlet, at least part of the guide plate forms an inclined part, the inclined part is arranged to extend towards the bottom wall in an inclined mode, and the inclined part is closer to the bottom wall along with the increase of the distance between the inclined part and the liquid inlet in the direction of the central axis X of the liquid inlet; at least part of the peripheral edge of the guide plate is connected with the bottom wall and divides the bottom wall into a first bottom wall part and a second bottom wall part; at least part of the guide plate, the second bottom wall part and at least part of the outer peripheral wall connected with the edge of the second bottom wall part jointly enclose a liquid inlet pool; at least one shaft, at least one part of which is arranged in the pump station body; one liquid inlet end of the shaft is arranged in the liquid inlet pool; a water pump is arranged in the shaft. The pump station can realize stable water flow state and improve the running stability of the submersible pump.

Description

Pump station

Technical Field

The invention relates to the technical field of hydraulic engineering, in particular to a pump station.

Background

Along with the development of urban construction, municipal rainwater and more sewage are used, so that various sewage treatment equipment appears, and a pump station is one of the sewage treatment equipment.

Chinese patent application publication No. CN104454549A discloses an axial-flow prefabricated pump station, which includes a tank body, a flow stabilizing plate, a shaft, and an axial-flow pump, wherein the lower end of the shaft is fixed at the central position of the tank body through the flow stabilizing plate, and the axial-flow pump is fixed at the central position of the lower end of the shaft, so that when the prefabricated pump station operates, because the axial-flow pump and the shaft are installed at the central positions of the tank body and the flow stabilizing plate, after fluid rushes into the pump station from a water inlet on the side, the flow state of the fluid becomes uneven, and the phenomena of uneven flow velocity, flow line distribution, turbulence and the like are adverse to the operation of the water pump, which not only affects the performance of the water pump, but also causes mechanical vibration of the water pump and damage to components such as bearings and the like due to uneven load distribution for a long time.

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

A primary object of the present invention is to provide a pump station that can operate stably.

To achieve the above object, according to one aspect of the present invention, there is provided a pump station including a pump station body, the pump station body including: the diapire with locate periphery wall on the diapire, be equipped with the inlet on the periphery wall, the pump station still includes: a deflector, at least one well bore, and a water pump. The guide plate is arranged in the pump station body, the guide plate is positioned below the liquid inlet, at least part of the guide plate forms an inclined part, the inclined part is arranged to extend towards the bottom wall in an inclined mode, and in the extending direction of the central axis of the liquid inlet, the inclined part is closer to the bottom wall along with the increase of the distance between the inclined part and the liquid inlet; at least part of the peripheral edge of the guide plate is connected with the bottom wall and divides the bottom wall into a first bottom wall part far away from the liquid inlet and a second bottom wall part close to the liquid inlet; at least part of the guide plate, the first bottom wall part and at least part of the outer peripheral wall connected with the edge of the first bottom wall part jointly enclose a liquid inlet pool; at least one part of the shaft is arranged in the pump station body; one liquid inlet end of the shaft is arranged in the liquid inlet pool; and a water pump is arranged in the shaft.

According to an embodiment of the invention, the distance from one end of the guide plate close to the liquid inlet to the bottom wall is H, the inner diameter of the shaft is d, and H is larger than or equal to 3 d.

According to an embodiment of the present invention, the outer contour of the bottom wall is circular, square, regular hexagon or regular octagon; and the size of the bottom wall in the extension direction of the central axis of the liquid inlet is L, the inner diameter of the shaft is d, and L is more than or equal to 3d and less than or equal to 5 d.

According to an embodiment of the present invention, a dimension of the first bottom wall portion in an extending direction of the central axis of the liquid inlet is S, and S is greater than or equal to 1.5d and less than or equal to 2 d.

According to an embodiment of the invention, at least part of the peripheral edge of the baffle is connected to the inner wall of the peripheral wall.

According to an embodiment of the invention, the water pump is an axial flow pump or a cross flow pump.

According to an embodiment of the invention, the number of the well bores is two, and the two well bores are perpendicular to the bottom wall and are arranged at intervals in parallel.

According to an embodiment of the invention, the separation plate is vertically arranged on the first bottom wall part and arranged between the two shafts, and the peripheral edge of the separation plate is respectively connected with the guide plate, the first bottom wall part and part of the inner wall of the peripheral wall to separate the liquid inlet ends of the two shafts.

According to an embodiment of the invention, the deflector comprises: the first guide plate forms the inclined part, an included angle between the first guide plate and the central axis of the liquid inlet is alpha, and alpha is more than or equal to 30 degrees and less than or equal to 60 degrees; the second guide plate is connected with the first guide plate, part of the peripheral edge of the second guide plate is connected with the bottom wall and divides the bottom wall into a first bottom wall part far away from the liquid inlet and a second bottom wall part close to the liquid inlet; the included angle between the second guide plate and the central axis of the pump station body is beta, and beta is more than or equal to 0 degree and less than or equal to 30 degrees.

According to an embodiment of the present invention, the second flow guiding plate is perpendicular to the bottom wall, the second flow guiding plate is a rectangular plate, and one side edge of the rectangular plate is connected to the first flow guiding plate.

According to an embodiment of the invention, the height of the second guide plate is h, the inner diameter of the shaft is d, and h is greater than or equal to 1.5 d.

According to an embodiment of the invention, the baffle further comprises: a third baffle disposed between the first baffle and the second baffle and simultaneously connecting the first baffle and the second baffle.

According to an embodiment of the invention, the peripheral edge of the first baffle is in sealing connection with the inner wall of the peripheral wall.

According to an embodiment of the present invention, the guide plate is an integral structure, and the guide plate is in curved surface transition from one end close to the liquid inlet to the other end close to the bottom wall.

According to an embodiment of the invention, all of the deflectors constitute the inclined portion.

According to an embodiment of the present invention, in an extending direction of the central axis of the liquid inlet, the baffle is configured to: the included angle between the tangent plane of the guide plate and the central axis of the liquid inlet is increased along with the increase of the distance between the guide plate and the liquid inlet.

According to an embodiment of the invention, an included angle between a tangent plane of one end of the guide plate close to the liquid inlet and a central axis of the liquid inlet is gamma, wherein gamma is more than or equal to 0 degree and less than or equal to 60 degrees; the included angle between the tangent plane of one end of the guide plate close to the bottom wall and the central axis of the pump station body is delta, and delta is larger than or equal to 0 degree and smaller than or equal to 30 degrees.

According to an embodiment of the invention, the upper part of the guide plate close to the liquid inlet is provided with a vent hole.

According to an embodiment of the present invention, a portion of the peripheral edge of the baffle plate connected to the peripheral wall is a first peripheral edge, a portion of the peripheral edge of the baffle plate connected to the bottom wall is a second peripheral edge, the first peripheral edge is in transitional connection with the second peripheral edge, and a bent drainage opening is provided between the peripheral edge of the baffle plate and the peripheral wall and the bottom wall at the transitional connection position.

According to the technical scheme, the invention has at least one of the following advantages and positive effects:

the liquid inlet pool is constructed by arranging the guide plate in the pump station, the guide plate is provided with an inclined part, and after water flow enters the pump station body through the liquid inlet, part of the fluid firstly impacts the inclined part of the guide plate to consume part of energy, so that the water drop phenomenon caused by the large fall of the fluid from the liquid inlet to the bottom wall of the pump station body is improved; meanwhile, unfavorable water conservancy conditions such as circulation, vortex and the like generated on a plane after fluid enters the inside of the pump station due to the inertia effect are avoided, the inlet flow state of a large-flow axial flow pump/tubular pump arranged in the pump station is improved, and the phenomena that various vortexes carry gas to cause uneven load of a water pump blade, the pump is unstable in operation and generates vibration and noise are avoided, so that the safe and reliable operation of the pump is ensured, and the working efficiency of the pump is improved.

The compact inner space of the pump station can contain two large-flow axial-flow pumps/cross-flow pumps, so that the pump station can be used for urban drainage pump station systems, including general rainwater pump stations, rainwater and sewage mixing pump stations, urban interchange and other tunnel pump stations and other scenes; the method is particularly suitable for the requirements of newly built or transformed pump stations with limited construction land scale.

The design that the pump station is inside succinct combines the design of pump station diapire automatically cleaning, can reduce the maintenance work of operation administrative unit to the pump station.

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.

FIG. 1 is a schematic diagram of a pump station according to an exemplary embodiment;

FIG. 2 is a schematic diagram of a pump station shown from another perspective according to an exemplary embodiment;

FIG. 3 is a schematic diagram of a pump station shown from another perspective according to an exemplary embodiment;

FIG. 4 is a schematic side view of a pump station according to an exemplary embodiment;

FIG. 5 is a schematic cross-sectional view of a pump station according to an exemplary embodiment;

FIG. 6 is a schematic cross-sectional view of a pump station according to another exemplary embodiment;

FIG. 7 is a schematic cross-sectional view of a pump station according to another exemplary embodiment;

FIG. 8 is a schematic cross-sectional view of a pump station according to another exemplary embodiment;

FIG. 9 is a top view of a pump station shown according to an exemplary embodiment;

FIG. 10 is a top view of a pump station according to another exemplary embodiment;

FIG. 11 is a top view of a pump station according to another exemplary embodiment;

FIG. 12 is a partial schematic view of a pump station provided with a drain port according to an exemplary embodiment;

FIG. 13 is a schematic diagram of a top cover of a pump station according to an exemplary embodiment;

FIG. 14 is a schematic diagram illustrating a configuration of a grid provided in a pump station according to an exemplary embodiment;

FIG. 15 is a schematic view of the pump station of FIG. 14 shown from another perspective with a grid pattern provided therein;

FIG. 16 is a top view of FIG. 14;

FIG. 17 is a schematic view of a grid shown in accordance with an exemplary embodiment;

FIG. 18 is a flow chart of the present invention showing the pump station using simulation software when pumping water;

FIG. 19 is a speed cloud obtained by the pump station of the present invention using simulation software when pumping water;

FIG. 20 is a flow chart obtained by comparing the simulation software used in the first design of the pump station when pumping water;

FIG. 21 is a speed cloud chart obtained by using simulation software when a pump station of the first design is used for pumping water;

FIG. 22 is a flow chart obtained by using simulation software when the pump station of the second comparative design pumps water;

fig. 23 is a speed cloud chart obtained by using simulation software when the pump station of the second comparative design pumps water.

Description of reference numerals:

100. a pump station body; 1. a bottom wall; 101. a first bottom wall portion; 102. a second bottom wall portion; 2. an outer peripheral wall; 3. a liquid inlet; 4. a baffle; 41. a first baffle; 42. a second baffle; 43. air holes are formed; 5. a wellbore; 6. a water outlet; 7. a partition plate; 8. a top cover; 81. an opening; 9. a first reinforcing rib; 10. a second reinforcing rib; 11. a liquid outlet; 12. a liquid outlet pipe; 13. a water pump; 20. a grid; p, a liquid inlet tank; x, a central axis X of the liquid inlet; y, a central axis of the pump station body; alpha, the included angle between the first guide plate and the central axis of the liquid inlet; beta, the included angle between the second guide plate and the central axis of the pump station body; delta, an included angle between a tangent plane at one end of the guide plate close to the bottom wall and the central axis of the pump station body; d. the inside diameter of the wellbore; H. the height of the baffle; l and the size of the bottom wall along the extension direction of the central axis of the liquid inlet; s, the size of the first bottom wall part along the extension direction of the central axis of the liquid inlet; h. the height of the second baffle.

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 term "downstream" in the present invention means that a certain point is located rearward relative to another point along the flow direction of the water flow, for example, the point B is located downstream of the point a, or becomes downstream, that is, the water flow passes through the point a first and then the point B in the flow direction of the water flow.

One embodiment of the present invention provides a pump station, and referring to fig. 1 to 11, fig. 1 to 11 respectively show a schematic structural diagram of the pump station of the present invention from different angles. As shown in fig. 1 to 11, the pump station includes a pump station body 100, and the pump station body 100 includes: diapire 1 with locate the periphery wall 2 on the diapire 1, be equipped with inlet 3 on the periphery wall 2. The pump station still includes: a deflector 4, at least one well 5 and a water pump 13. Wherein, in pump station body 100 is located to guide plate 4, guide plate 4 is located the below of inlet 3, and at least some guide plate 4 constitute the rake, and the rake sets up to extending to 1 slope of diapire to in the extending direction of the axis X of inlet 3, along with the increase of the distance between rake and the inlet 3 and more be close to diapire 1. At least part of the peripheral edge of the flow guide plate 4 is connected with the bottom wall 1 and divides the bottom wall 1 into a first bottom wall part 101 far away from the liquid inlet 3 and a second bottom wall part 102 close to the liquid inlet 3; at least part of the guide plate 4, the first bottom wall 101 and at least part of the outer peripheral wall 2 connected with the edge of the first bottom wall 101 together enclose a liquid inlet tank p (pump intake pool). At least one part of the shaft 5 is arranged in the pump station body 100, one liquid inlet end of the shaft 5 is arranged in the liquid inlet pool P, and the water pump 13 is arranged in the shaft 5. Fluid flows through the guide plate 4 from the fluid inlet 3, enters the fluid inlet pool P, is sucked by the water pump 13 through the fluid inlet end of the shaft 15 and then flows out of the pump station through the fluid outlet 11.

The pump station according to the above-described embodiment of the invention,

because the liquid inlet pool P is constructed by arranging the guide plate 4 in the pump station, and the guide plate is provided with the inclined part, after water flow enters the pump station body 100 through the liquid inlet 3, part of the fluid firstly impacts the inclined part of the guide plate 4 to consume part of energy, and the water drop phenomenon caused by the large drop of the fluid entering the pump station body 100 from the liquid inlet 3 to the bottom wall 1 of the pump station is improved; meanwhile, unfavorable water conservancy conditions such as circulation, vortex and the like generated on a plane after fluid enters the interior of the pump station due to the inertia effect are avoided, the inlet flow state of a large-flow axial flow pump/tubular pump arranged in the pump station in a built-in mode is improved, and the phenomena that after the pump station is provided with the water pump, various vortexes carry gas to cause uneven load of a water pump blade, the pump is unstable in operation and generates vibration and noise are avoided, so that the safe and reliable operation of the pump is ensured, and the working efficiency of the pump is improved.

The compact inner space of the pump station can contain two large-flow axial-flow pumps/cross-flow pumps, so that the pump station can be used for urban drainage pump station systems, including general rainwater pump stations, rainwater and sewage mixing pump stations, urban interchange and other tunnel pump stations and other scenes; the method is particularly suitable for the requirements of newly built or transformed pump stations with limited construction land scale. The design that the pump station is inside succinct combines the design of pump station diapire automatically cleaning, can reduce the maintenance work of operation administrative unit to the pump station.

The pump station of the present invention will now be described in detail.

As shown in FIG. 4, a central axis X of the inlet is defined and passes through the center of the inlet 3. It will be appreciated that the centre axis X of the inlet opening may extend parallel to the bottom wall 1. The central axis Y of the pump station body is defined, the pump station body 100 is cylindrical or hollow cuboid or square, and the central axis Y of the pump station body is the central axis of the pump station passing through the center of the bottom wall 1. In an embodiment, in order to more clearly and accurately show the liquid inlet tank P, as shown in fig. 4, the filling space indicated by the hatched portion is the liquid inlet tank P, and the liquid inlet tank P is defined by all the flow guide plates 4, the first bottom wall portion 101 and at least a part of the outer peripheral wall 2 connected with the edge of the first bottom wall portion 101, but the liquid inlet tank P may also be defined by a part of the flow guide plates 4, the first bottom wall portion 101 and at least a part of the outer peripheral wall 2 connected with the edge of the first bottom wall portion 101, which is not particularly limited herein. The terms "upper" and "lower" in the present invention mean that the bottom wall 1 is located at the lower part of the pump station, and the liquid inlet 3 is located above the bottom wall 1, relative to the pump station.

As shown in fig. 5, the size of the guide plate 4 and the inlet tank P is designed as follows: the distance from one end of the guide plate 4 close to the liquid inlet 3 to the bottom wall 1 is H, the inner diameter of the shaft 5 is d, then H is larger than or equal to 3d, preferably H is larger than or equal to 4d, the size of the bottom wall 1 in the extension direction of the central axis X of the liquid inlet 3 is L, L is larger than or equal to 3d and smaller than or equal to 5d, the distance of the first bottom wall part 101 in the extension direction of the central axis X of the liquid inlet is S, and S is larger than or equal to 1.5d and smaller than or equal to 2 d. So design can realize guaranteeing to have enough distance guide fluid in the vertical direction for fluidic velocity distribution is even, and the design of liquid inlet tank P bottom size can make near the fluid velocity distribution of water pump 13 imbibition mouth even simultaneously, and average speed is higher than 0.3m/s, can pump out the pump station with objects such as the solid rubbish that is insoluble in fluid, avoids the siltation.

It is understood that the outer contour of the bottom wall 1 may be circular, square, regular hexagon or regular octagon, or may be other geometric shapes, and is not limited herein. It should be noted that, when the bottom wall 1 is circular, the dimension L of the bottom wall 1 in the extending direction along the central axis X of the liquid inlet 3 is the diameter of the bottom wall 1, and when the outer contour of the bottom wall 1 is the other geometric shape, the straight line representing the dimension L overlaps the projection of the central axis X of the liquid inlet 3 on the bottom wall 1, and the straight line representing the dimension L is a connecting line of two opposite sides of the outer contour of the bottom wall 1, and the point is generally a midpoint.

In addition, if the cross-sectional area of the liquid inlet 3 of the pump station body 100 is a, the cross-sectional area can be designed according to the following relationship: a is Q/v, wherein v is the fluid flow velocity of the liquid inlet and is between 0.4m/s and 0.8m/s, and Q is the designed processing flow of the pump station and is 1-5 m³And s. Designing flows by operating a single barrel pump station or operating a plurality of barrel pump stations in parallelThe amount can cover 1m³S to 20m³The range of/s.

As shown in fig. 1, it will be appreciated that at least part of the peripheral edge of the baffle 4 is connected to the inner wall of the peripheral wall 2 to enhance the stability of the baffle 4 to the pump station body 100.

As shown in fig. 1 to 4, the baffle 4 may comprise two parts, a first baffle 41 and a second baffle 42, with the first baffle 41 and the second baffle 42 being connected to each other. First guide plate 41 is located the below of inlet 3, and first guide plate 41 sets up to slope extension to diapire 1, constitutes the rake promptly to in the extending direction of the axis X of inlet 3, first guide plate 41 sets up to: the first baffle 41 is closer to the bottom wall 1 with the distance between the first baffle 41 and the liquid inlet 3, in other words, the first baffle 41 is inclined from top to bottom in a direction away from the liquid inlet 3. As shown in fig. 5, the included angle between the first baffle plate 41 and the central axis X of the liquid inlet is α, α is greater than or equal to 30 ° and less than or equal to 60 °, so that the first baffle plate 41 can be obliquely arranged, and the fluid is impacted on the inclined first baffle plate 41 to consume part of energy, and is buffered in the vertical direction, so that the flow velocity of the fluid in the vertical direction is reduced, and the fluid flows into the liquid inlet tank P along the second baffle plate 42, and the flow state is properly homogenized in the process.

As shown in FIG. 1, the first baffle 41 may be a flat plate having an arc-shaped edge and a non-arc-shaped edge, at least a part of the arc-shaped edge being connected to the peripheral wall 2 below the liquid inlet 3, i.e. the curvature of the arc-shaped edge of the connecting portion is the same as the curvature of the curved surface of the inner wall of the peripheral wall 2, so that the arc-shaped edge portion can be matched and connected with the inner side surface of the peripheral wall 2. The non-arcuate edge is attached to the upper end of the second baffle 42.

It will be appreciated that the non-curved edge of the first baffle 41, which may be a straight line, a broken line or an irregular geometric line, matches the shape of the upper end of the second baffle 42 so that the two are in sealing engagement to the maximum extent possible for improved impact resistance and pump station stability.

With continued reference to fig. 1-3, the first baffle 41 has an arcuate edge and a linear edge that fully engages the upper end of the second baffle 42 to provide a sealed connection therebetween while also facilitating manufacturing. The connection relationship between the first baffle 41 and the second baffle 42 may be integrally formed, or may be formed by bonding, welding, or clipping, and is not limited herein.

As shown in fig. 1 to 4, the arc edge of the first flow guide plate 41 is in sealing connection with the inner wall of the outer peripheral wall 2, so that after water flows in from the liquid inlet 3, the water can flow into the liquid inlet pool P along with the inclined part of the flow guide plate 4 to a greater extent, and meanwhile, the sealing connection also enhances the connection strength of the two, thereby improving the overall strength of the pump station.

It is understood that the first diversion plate 41 may also be a rectangular flat plate (not shown in the figure), and of the two opposite sides, one side is connected to the outer peripheral wall 2 below the liquid inlet 3, and the other side is connected to the upper end of the second diversion plate 42, and for a specific connection manner, reference may be made to the connection relationship of the first diversion plate 41 having the arc-shaped edge in the above embodiment, and details are not described here. The first baffle 41 is designed as a rectangular plate, which can facilitate processing. In addition, the rectangular first baffle 41 can be further designed to: two corner portions of the side of the first baffle 41 opposite to the second baffle 42 are rounded to facilitate connection with the outer peripheral wall 2 of the arc-shaped face.

As shown in fig. 5, which shows a schematic cross-sectional view of the pump station of fig. 1 along a-a. As can be seen from the figure, the second guide plate 42 is disposed perpendicular to the bottom wall 1, and the second guide plate 42 is a rectangular plate, one side edge of the rectangular plate is connected to the first guide plate 41, the opposite other side (i.e. the bottom end edge) of the second guide plate 42 is connected to the bottom wall 1 in a sealing manner, and the side edge is connected to the outer circumferential wall 2. The rectangular plate is adopted, so that the processing and the manufacturing are convenient. Of course, it is understood that the second baffle 42 can be configured in other configurations, such as where the edge of the second baffle 42 is non-linear, the top edge of the first baffle 41 can be configured as a complementary non-linear edge to the first baffle 41 for connection thereto.

As shown in fig. 1, 5 to 6, a part of the outer peripheral edge of the second baffle 42 is connected to the bottom wall 1, and divides the bottom wall 1 into the first bottom wall portion 101 and the second bottom wall portion 102 described above. The second guide plate 42 is vertically arranged on the bottom wall 1, so that the water flow can be sufficiently buffered in the vertical direction, and the flow state can be well stabilized. Of course, the second baffle 42 may not be perpendicular to the bottom wall 1, as in the above embodiment, and referring to fig. 6, the angle between the second baffle 42 and the central axis Y of the pump station body is 0 ° β 30 °. By the design, the stroke of the water flow entering the liquid inlet pool P is prolonged, and the flow state of the water flow entering the liquid inlet pool P is stable.

And the height of the second guide plate 42 is h, the inner diameter of the shaft 5 is d, and h is more than or equal to 1.5d, preferably more than or equal to 2 d. The design can ensure that enough distance is ensured to guide the fluid in the vertical direction, so that the flow velocity distribution of the fluid is uniform.

As shown in fig. 7, on the basis of the above embodiment, the baffle 4 may further include: a third baffle 43, the third baffle 43 is arranged between the first baffle 41 and the second baffle 42, and simultaneously connects the first baffle 41 and the second baffle 42. The third baffle 43 is arranged to buffer the connection between the first baffle 41 and the second baffle 42, i.e. the stroke of the fluid is further increased, and the fluid is further buffered. Of course, a fourth baffle, a fifth baffle, etc. may also be provided, which are connected between the first baffle 41 and the second baffle 42 in sequence, and those skilled in the art may set the baffle according to actual needs, and no special limitation is made here.

As shown in fig. 8, the baffle 4 may also be an integral structure, and the curved transition is formed from one end of the integral structure close to the liquid inlet 3 to the other end close to the bottom wall 1, and at least a part of the peripheral edge of the baffle 4 is connected to the inner wall of the peripheral wall 2 and/or the bottom wall 1. For example, the baffle 4 extends from the bottom of the liquid inlet 3 to the bottom wall 1. The baffle 4 may be the case where the first baffle 41 and the second baffle 42 are integrally formed as described above, or may be a baffle 4 having curved surfaces with different curvatures, and in short, the function thereof is the same as that of the first baffle 41 and the second baffle 42 described above.

With continued reference to fig. 8, the baffle 4 of the unitary structure may be a curved plate, i.e. the entire baffle 4 constitutes the above-mentioned inclined portion. In the cross-section of this curved plate in fig. 8, in the direction of extension of the centre axis X of said liquid inlet 3, the baffle 4 is arranged: the included angle between the tangent plane of the guide plate 4 and the central axis X of the liquid inlet 3 is increased along with the increase of the distance between the guide plate 4 and the liquid inlet 3. From top to bottom promptly, this guide plate 4's structural design is for being steep by gentle transition, and the effect of design like this is: rivers get into the back from inlet 3, impact this gentle part earlier, make rivers obtain sufficient buffering in vertical direction, and the flow state obtains better stability, later with during more stable state flows into liquid pool P, not only can the stable flow state, can also save space, reduce the volume of pump station, and then reduce area.

Specifically, the included angle between the tangent plane of one end of the guide plate 4 close to the liquid inlet 3 and the central axis X of the liquid inlet 3 is gamma, wherein gamma is more than or equal to 0 degree and less than or equal to 60 degrees, and specifically, gamma can be 30 degrees, 45 degrees or 50 degrees; the included angle between the tangent plane of one end of the guide plate 4 close to the bottom wall 1 and the central axis Y of the pump station body 100 is delta, delta is greater than or equal to 0 degree and less than or equal to 30 degrees, and specifically, delta can be 15 degrees, 20 degrees or 25 degrees.

It is understood that the peripheral edge of the baffle 4 may be completely and hermetically connected to the inner wall of the peripheral wall 2 and the bottom wall 1, or may be incompletely and hermetically connected to the peripheral wall 2 and the bottom wall 1, for example, as shown in fig. 12, the portion where the peripheral edge of the baffle 4 is connected to the peripheral wall 2 is a first peripheral edge, the portion where the peripheral edge of the baffle 4 is connected to the bottom wall 1 is a second peripheral edge, the first peripheral edge is in transitional connection with the second peripheral edge, and a bent drain opening 6 is provided between the peripheral edge of the baffle 4 and the peripheral wall 2 and the bottom wall 1 at the transitional connection position.

Specifically, as shown in fig. 12, the drain port 6 is a gap between the outer peripheral edge of the baffle 4 and the outer peripheral wall 2 and the bottom wall 1. After entering the liquid inlet tank P, the water can enter the space formed by the second bottom wall portion 102 and the outer peripheral wall 2 through the water outlet 6, so that the following effects can be achieved: when the flow velocity of the water flow is high, turbulent motion still exists after the water flow enters the liquid inlet tank P, and the water flow entering the liquid inlet tank P is slowly discharged into the space formed by the second bottom wall portion 102 through the water outlet 6, so that the turbulent motion is reduced, that is, the vortex of the water flow in the liquid inlet tank P is further reduced, and the flow state is further stabilized.

Bearing, about the relation of connection of guide plate 4 and periphery wall 2 and diapire 1, can also be that the peripheral edge of guide plate 4 connects in the inner wall and the diapire 1 of periphery wall 2, improve the joint strength of guide plate and pump station body 100, improve the stability of pump station.

As shown in fig. 1 to 3, the first guide plate 41 has an air hole 43 at the upper part near the liquid inlet 3. The vent hole 43 may be a circular hole, an elliptical hole, a rectangular hole, or a square hole, which is not limited herein. After the water flow is discharged to the space formed by the second bottom wall portion 102 and the outer peripheral wall 2 through the air outlet, the original air can be discharged through the air outlet, so that the water flow can smoothly enter the space formed by the second bottom wall portion 102 and the outer peripheral wall 2 through the water outlet 6, and the optimization of the flow state of the water flow is further ensured.

It can also be understood that the air holes 43 are also formed on the upper portion of the integrated flow guide plate 4 close to the liquid inlet 3, and the positions, shapes and effects of the air holes 43 are the same as those of the air holes in the above embodiments, and will not be described herein again.

As shown in fig. 1 to 3, two shafts 5 can be disposed in the pump station body 100, and the two shafts 5 are disposed in the liquid inlet tank P, perpendicular to the bottom wall 1 and spaced in parallel. Each shaft 5 can be provided with a water pump 13, and the water pump 13 can be an axial flow pump or a cross flow pump, so that double-pump water suction is realized. Therefore, the two shafts 5 are arranged in the embodiment of the invention, the pumping amount of water flow is increased, fluid can be discharged in time, and the processing capacity of a single water pump is up to 1.2m³S to 2m³The pump station is suitable for application of rain flood drainage, in addition, two pumps in two shafts 5 can be used for one pump, the situation that one water pump fails and cannot continuously drain water is prevented, the diameter of each shaft 5 can be 500 mm-1200 mm, such as 600mm, 800mm and 900mm, the inner space of the pump station is compact, in addition, when the pump station body 100 is cylindrical, the diameter of the pump station body can be 3000 mm-4200 mm, and if the pump station body is square, the side length of the cross section can be equal to that of the squareAnd the floor area of the whole pump station is greatly reduced based on the 4000 mm.

With continued reference to fig. 1 to 3 and 5 to 12, the pump station may further comprise a partition plate 7, which partition plate 7 is vertically arranged on the bottom wall 1 and is arranged between the two shafts 5. The outer peripheral edge of the partition plate 7 is connected with the guide plate 4, the first bottom wall part 101 and part of the inner wall of the outer peripheral wall 2 respectively to separate the liquid inlet ends of the two shafts 5. Specifically, this division board 7 can be divided into two parts that have the same area with first bottom wall portion 101, so, division board 7 will advance liquid pool P and further divide into two same regions equally, be provided with a pit shaft 5 and a water pump 13 in every region, so, rivers are divided into two parts when flowing into liquid pool P through guide plate 4, turbulent part in the rivers in two regions strikes the lower part (or second guide plate 42) of guide plate 4, periphery wall 2 and division board 7, and then consume most energy, make the turbulent flow disappear to a great extent, the flow regime of rivers is more even, the velocity of flow reduces more, in addition, can also prevent that two water pumps from taking place mutual interference when absorbing water, create good intake condition for the immersible pump, promote the stability of immersible pump operation. In addition, because two submersible pumps are arranged, water is pumped in each area, stable water flow can be pumped away quickly and timely, and the water pumping efficiency is improved.

As shown in fig. 1 to 3, it is understood that the partition plate 7 may be a rectangular plate, or may be a plate having an arc-shaped edge, as long as one pair of opposite sides thereof can be respectively connected to the lower portion of the flow guide plate 4, and the other side thereof is connected to the outer circumferential wall 2 to divide the liquid inlet tank P into two parts, which is not particularly limited herein. In addition, the bottom end of the partition plate 7 can be connected with the bottom wall 1 in a sealing mode or in a non-sealing mode, namely a gap can be formed between the partition plate 7 and the bottom wall 1, so that water flows in the two areas can be slowly exchanged, and the flow state of the water flow is further stabilized.

As shown in fig. 5, the height of the partition plate 7 is equal to the height of the second baffle plate 42 in the direction perpendicular to the bottom wall 1 (i.e., in the direction of extension of the central axis Y of the pump station body). So design, can make full use of division board 7 and guide plate 4's water conservancy diversion and reposition of redundant personnel effect, save raw and other materials moreover and be convenient for processing and installation. Of course, as shown in fig. 6 to 7, the partition plate 7 may be higher or lower than the second baffle 42, and those skilled in the art can determine the specific application environment, and is not limited herein.

As shown in fig. 10, which shows a top view of the pump station, which can show the shape of the cross section of the partition plate 7, the opposite sides of the partition plate 7 in the above embodiment may have chamfers such that the thickness of the portions of the partition plate 7 near the opposite sides gradually increases. Specifically, the two opposite sides refer to two sides respectively connected with the peripheral wall 2 and the flow guide plate 4, so that the partition plate 7 has a shape similar to an hourglass, water flow can be further buffered after entering the liquid inlet tank P, and the flow state of the water flow inside the liquid inlet tank P is optimized.

As shown in fig. 11, which shows a top view of a partition plate 7 having another shape of the pump station body, it can be seen from fig. 11 that the partition plate 7 may have a chamfer on the side connected to the baffle plate 4 and a chamfer on the other side connected to the peripheral wall 2 without a chamfer.

Of course, the partition plate 7 may have a thickness gradually increasing from the middle position toward the opposite sides in the above-described embodiment, and the surface of the partition plate 7 may be transited from the middle position toward the both sides in the form of a smooth curved surface. This design can further optimize the flow regime of the water flow inside the intake basin P.

With continued reference to fig. 10, there is shown a schematic view of the pumping station body 100 in the shape of a rectangular parallelepiped, wherein, in addition to the opposite sides of the partition plate 7, the guide plate 4 has chamfers on the opposite sides contacting the peripheral wall 2, so as to further buffer the impact of the water flow and improve the steady state of the water flow.

In conclusion, because the pump station sets up guide plate 4 at liquid inlet 3 downstream side, guide plate 4 has the rake, and the rake sets up to on the extending direction along the axis X of liquid inlet 3, along with the increase of the distance between rake and liquid inlet 3 and more be close to diapire 1, rivers are after getting into pump station body 100 through liquid inlet 3, partial fluid strikes guide plate 4 earlier and consumes some energy, and then flows into to liquid inlet tank P along guide plate 4's inclined plane, the flow state obtains appropriate homogenization at this in-process flow state. After rivers flow into in the feed liquor pond P, divide into two parts by division board 7, and the fluid is injectd in two spaces that guide plate 4, division board 7 and periphery wall 2 formed, because the turbulent flow of rivers receives the blockking of guide plate 4, division board 7 and periphery wall 2, and this turbulent flow receives the impact and consumes most energy for the flow state is more homogenization, and the velocity of flow reduces more, creates good condition of intaking for the immersible pump, promotes the stability of immersible pump operation.

Of course, it can be understood that one shaft 5, three shafts 5 or four shafts 5 or other number of shafts 5 may also be disposed in the pump station body 100 of the present invention, when three shafts 5 or four shafts 5 or other number of shafts 5 are disposed, the partition plate 7 described above may be disposed between every two adjacent shafts 5, and the structure, position and function of the partition plate 7 are the same as those of the partition plate 7 in the above-described embodiment, and will not be described again here. Regarding the number of the specific well bores 5 and the arrangement of the partition plates 7, those skilled in the art can arrange them according to actual needs, and the arrangement is not limited herein. In addition, the bottom of the shaft 5 is connected with the bottom of the pump station through foundation bolts, and during the field construction process, secondary grouting is performed on the bottom of the pump station, so that the fixed connection between the pump station and a concrete foundation is ensured, and the strength of the pump station is ensured.

Referring to fig. 13, a schematic structural diagram of a top cover 8 of a pump station according to an embodiment of the present invention is shown. As shown, the top cover 8 is hermetically disposed on the top of the peripheral wall 2, and at least one opening 81 is formed on the top cover 8, and the diameter of the opening 81 is larger than the outer diameter of the shaft 5. It can be understood that the openings 81 are arranged corresponding to the well bores 5, the number of the openings 81 is the same as the number of the well bores 5, and the diameter of the openings 81 is larger than the outer diameter of each corresponding well bore 5, so that the well bores 5 can be conveniently and accurately installed in the pump station body 100 during the assembly process of the pump station.

With continued reference to fig. 13, a flange is provided at each opening 81 by which the top of the shaft 5 is connected to the roof 8. The installation of the shaft 5 is facilitated due to the large flanges. In addition, the cable outlet can be arranged on the outer wall of the top of the shaft 5, and the outlet direction of the cable outlet is perpendicular to the central shaft of the shaft 5, so that the installation and combing of cables are facilitated.

As shown in fig. 1 to 4, two liquid outlets 11 are provided on the outer peripheral wall 2 of the pump station body 100, and the two liquid outlets 12 are vertically communicated with the two shafts 5 through the two liquid outlets 11, respectively. It is understood that the number of the liquid outlets 11 corresponding to each well 5 is the same as the number of the wells 5, and is not limited herein.

As shown in fig. 2, the pump station further comprises: a plurality of first ribs 9 provided in parallel to the second bottom wall portion 102 at intervals; and at least one second reinforcing bead 10 perpendicularly cross-coupled to the plurality of first reinforcing beads 9 and extending in a direction perpendicular to the first reinforcing beads 9. As shown in fig. 2, the pump station is provided with two first reinforcement ribs 9 in the second bottom wall part 102. Of course, the number of the first reinforcing ribs 9 may also be 3, 5, 8, 10, and the like, and those skilled in the art may set the first reinforcing ribs 9 according to the size and the actual application scenario, which is not limited herein.

With continued reference to fig. 2, a second reinforcing rib 10 is provided on the second bottom wall portion 102, and the second reinforcing rib 10 is provided in the middle of the second bottom wall portion 102 so as to vertically penetrate two parallel first reinforcing ribs 9. Of course, the second reinforcing ribs 10 may be provided in plurality, and the plurality of second reinforcing ribs 10 are provided in parallel at intervals and are vertically inserted into the plurality of first reinforcing ribs 9. The number of the second reinforcing ribs 10 may be 2, 3, 5, 7, 8 or 10, and those skilled in the art may set the number according to the size and application scenario of the second reinforcing ribs 10.

The first reinforcing rib 9 and the second reinforcing rib 10 may be integrally formed or may be formed by splicing. If the splicing mode is adopted, each first reinforcing rib 9 can be divided into a plurality of sections, and a second reinforcing rib 10 is arranged between the two adjacent sections, or vice versa.

As shown in fig. 14 to 18, the pump station may further comprise a grating 20 provided in the pump station body 100 to intercept impurities in the fluid flowing from the inlet 3.

Since the well 5 of the present disclosure is not disposed at the center of the pump station body 100, but is disposed at the first bottom wall 101 having the liquid inlet 3 farther, a large space is saved in the pump station body 100 for installing the above-mentioned grille 20.

Specifically, the grid 20 is disposed at the downstream side of the liquid inlet 3, and may be attached to the edge of the liquid inlet 3. This grid 20 can be for the basket grid, through the lift of control grid 20, realizes setting up grid 20 in pump station body 100 and intercepts impurity. The grating 20 may be lifted by means of a hydraulic lifting device or a winch, which may be connected to the top of the grating 20.

In the related art, a general shaft is disposed at the center of the pump station body 100, and a condition for disposing a basket grid is not provided, and since the grid is generally disposed in a river channel, a mechanical grid and an artificial grid are generally adopted, and the operation is time-consuming and labor-consuming. And this disclosure can realize installing grid 20 in pump station body 100, further intercepts the impurity in the fluid to can alleviate the intensity of labour that artifical clear was drawn. Also, the grid 20 of the present disclosure may also be electrically connected to an image capture device, enabling remote control of the grid.

In addition, in the related art, the size of the conventional basket grid is generally below 1m by 1m, while the size of the basket grid of the present disclosure can reach 2.6m by 2.6m, and a larger range of interception is realized.

In order to highlight the stable flow state of the water flow of the pump station of the present invention, please refer to fig. 18 to 23, wherein fig. 18 to 19 are respectively a flow chart and a speed cloud chart obtained by the pump station using simulation software according to the above embodiment of the present invention, fig. 20 to 21 are respectively a flow chart and a speed cloud chart obtained by comparing and designing the pump station using simulation software, and fig. 22 to 23 are respectively a flow chart, a speed cloud chart and a flow chart of another part of rectification setting obtained by comparing and designing the pump station using simulation software. Wherein, not set up guide plate 4 among the pump station of contrast design one, then establish a baffle perpendicularly on diapire 1 in the contrast design two for rivers directly strike the vertically baffle after getting into from inlet 3.

As can be seen from fig. 18, the pump station according to the above embodiment of the present invention has a relatively uniform flow line direction, and has a significant flow straightening effect, especially in the area near the liquid suction port of the water pump. As can be seen from fig. 19, the velocity distribution of the water inlet cross section of the pump station according to the above embodiment of the present invention is relatively uniform, and the average fluid velocity at the bottom of the pump station is 0.3m/s, so that the occurrence of siltation can be avoided.

As can be seen from fig. 20, the flow lines of the pump station of the first design are not uniformly distributed, and the flow rectification effect of the pump station near the liquid inlet 3 of the water pump is not obvious as that of the pump station of the above embodiment of the present invention. As can be seen from FIG. 21, the two pumps interfere with each other, and the velocity distribution near the corner of the bottom of the pump station is not ideal, and is less than 0.3m/s, so that the sedimentation may occur.

As can be seen from fig. 22, the streamline distribution is comparatively disordered, and although a rectifying device (baffle) is added, the effect is not ideal. As can be seen from fig. 23, the velocity distribution of the water inlet cross section shows that the two water pumps interfere with each other, and the overall velocity distribution at the bottom of the pump station is not uniform.

The average value of the inlet pre-rotation angle of the pump station and the maximum axial speed offset can be referred to the following table:

watch 1

From the simulation diagram, the average value of the inlet pre-rotation angle of the pump station in the embodiment of the invention accords with the standard suggestion of ANSI/HI, and the maximum axial speed offset accords with the standard suggestion of ANSI/HI, so that the water flow at the bottom of the pump station enters the liquid suction ports of the submersible pumps from the periphery, and the flow state distribution of the liquid suction ports of the submersible pumps in the two areas is more uniform, thereby providing a good flow state for the submersible pumps and ensuring the integral effective operation of the pump station. The flow state of the fluid is stable, and the average value of the inlet pre-rotation angle and the maximum axial speed offset of the pump station of the first design and the second design exceed the standard suggestions of ANSI/HI, which indicates that the flow state of the fluid is unstable, and particularly interference occurs at the liquid inlet 3 of the water pump.

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 invention is capable of other embodiments and of being practiced and carried out in various 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 alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for carrying out the invention and will enable those skilled in the art to utilize the invention.

Claims

1. A pump station comprising a pump station body (100), the pump station body (100) comprising: diapire (1) and locating periphery wall (2) on diapire (1), be equipped with inlet (3) on periphery wall (2), its characterized in that, the pump station still includes:

the guide plate (4) is arranged in the pump station body (100), the guide plate (4) is positioned below the liquid inlet (3), at least part of the guide plate (4) forms an inclined part, the inclined part is arranged to extend towards the bottom wall (1) in an inclined mode, and in the extending direction of the central axis (X) of the liquid inlet (3), the inclined part is closer to the bottom wall (1) along with the increase of the distance between the inclined part and the liquid inlet (3); at least part of the peripheral edge of the flow guide plate (4) is connected with the bottom wall (1) and divides the bottom wall (1) into a first bottom wall part (101) far away from the liquid inlet (3) and a second bottom wall part (102) close to the liquid inlet (3); at least part of the guide plate (4), the first bottom wall part (101) and at least part of the outer peripheral wall (2) connected with the edge of the first bottom wall part (101) jointly enclose a liquid inlet pool (P);

at least one shaft (5), at least one part of the shaft (5) is arranged in the pump station body (100); a liquid inlet end of the shaft (5) is arranged in the liquid inlet pool (P);

a water pump (13) is arranged in the shaft (5).

2. The pump station according to claim 1, characterized in that the distance from the end of the flow guide plate (4) close to the liquid inlet (3) to the bottom wall (1) is H, the inner diameter of the shaft (5) is d, H is more than or equal to 3 d.

3. The pump station according to claim 1, characterized in that the outer contour of the bottom wall (1) is circular, square, regular hexagonal or regular octagonal; and is

The size of the bottom wall (1) in the extension direction along the central axis (X) of the liquid inlet (3) is L, the inner diameter of the shaft (5) is d, and L is more than or equal to 3d and less than or equal to 5 d.

4. The pump station according to claim 1, characterized in that the first bottom wall part (101) has a dimension S in the direction of extension of the centre axis (X) of the inlet opening (3), S being 1.5d ≦ S ≦ 2 d.

5. The pump station according to claim 1, characterized in that at least part of the peripheral edge of the flow deflector (4) is connected to the inner wall of the peripheral wall (2).

6. The pump station according to claim 1, characterized in that the water pump (13) is an axial flow pump or a through-flow pump.

7. The pump station according to claim 1, characterized in that the number of shafts (5) is two, two shafts (5) being arranged perpendicular to the bottom wall (1) and spaced apart in parallel.

8. The pump station according to claim 7, characterized in that the pump station further comprises a partition plate (7) vertically arranged on the first bottom wall portion (101) and arranged between the two well bores (5), wherein the peripheral edge of the partition plate (7) is respectively connected with the guide plate (4), the first bottom wall portion (101) and part of the inner wall of the peripheral wall (2) to separate the liquid inlet ends of the two well bores (5).

9. The pump station according to claim 1, characterized in that the deflector (4) comprises:

the first guide plate (41) forms the inclined part, and an included angle between the first guide plate (41) and the central axis (X) of the liquid inlet (3) is alpha which is more than or equal to 30 degrees and less than or equal to 60 degrees;

a second flow guide plate (42) connected with the first flow guide plate (41), wherein part of the peripheral edge of the second flow guide plate (42) is connected with the bottom wall (1) and divides the bottom wall (1) into a first bottom wall part (101) far away from the liquid inlet (3) and a second bottom wall part (102) close to the liquid inlet (3); the included angle between the second guide plate (42) and the central axis (Y) of the pump station body (100) is beta, and beta is more than or equal to 0 degree and less than or equal to 30 degrees.

10. The pump station according to claim 9, characterized in that the second baffle (42) is perpendicular to the bottom wall (1), the second baffle (42) being a rectangular plate, one side edge of which is connected to the first baffle (41).

11. The pump station according to claim 9, characterized in that the second deflector (42) has a height h and the shaft (5) has an inner diameter d, h ≧ 1.5 d.

12. The pump station according to claim 9, characterized in that the deflector (4) further comprises:

a third baffle (43), the third baffle (43) disposed between the first baffle (41) and the second baffle (42) and connecting the first baffle (41) and the second baffle (42) simultaneously.

13. The pump station according to claim 9, characterized in that the peripheral edge of the first baffle (41) is sealingly connected with the inner wall of the peripheral wall (2).

14. The pump station according to claim 1, characterized in that the guide plate (4) is of an integral structure and is in curved transition from one end of the guide plate (4) close to the liquid inlet (3) to the other end close to the bottom wall (1).

15. The pump station according to claim 14, characterized in that all of the deflectors (4) constitute the ramps.

16. The pump station according to claim 15, characterized in that in the direction of extension of the centre axis (X) of the liquid inlet (3) the deflector (4) is arranged: the included angle between the tangent plane of the guide plate (4) and the central axis (X) of the liquid inlet (3) is increased along with the increase of the distance between the guide plate (4) and the liquid inlet (3).

17. The pump station according to claim 16, characterized in that the included angle between the tangent plane of the end of the deflector (4) close to the liquid inlet (3) and the central axis (X) of the liquid inlet (3) is γ, γ is greater than or equal to 0 ° and less than or equal to 60 °; the included angle between the tangent plane of one end of the guide plate (4), which is close to the bottom wall (1), and the central axis (Y) of the pump station body (100) is delta, and delta is greater than or equal to 0 degree and less than or equal to 30 degrees.

18. The pump station according to claim 1, characterized in that the upper part of the guide plate (4) close to the liquid inlet (3) is provided with a vent hole (43).

19. The pump station according to claim 1, characterized in that the part of the peripheral edge of the flow guide plate (4) connected with the peripheral wall (2) is a first peripheral edge, the part of the peripheral edge of the flow guide plate (4) connected with the bottom wall (1) is a second peripheral edge, the first peripheral edge is in transitional connection with the second peripheral edge, and a bent-shaped water outlet (6) is arranged between the peripheral edge of the flow guide plate (4) and the peripheral wall (2) and the bottom wall (1) at the transitional connection position.