A municipal rainwater pumping station

Abstract

The present application relates to water supply and drainage equipment technical field, specifically to a kind of municipal rainwater pumping station, including well body, and submersible pump being installed in well body, the well body bottom has two layers, first well bottom layer, second well bottom layer respectively;The first well bottom layer is located above the second well bottom layer, and first well bottom layer position, second well bottom layer are all the shape of center low four weeks high, respectively form the inclined surface from four weeks to center;The center of the first well bottom layer has opening, and edge is provided with water hole;The water inlet of the submersible pump is arranged at the opening position;The second well bottom layer is closed layer;The water outlet position of the rainwater inlet pipe of the well body is arranged at the first well bottom layer position, and below the water hole.The present application reduces the sedimentation of silt by inclined first well bottom layer and second well bottom layer, without increasing powered dredging device, device is high in degree of simplification, and energy is saved, and operating cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water supply and drainage equipment, in particular to a municipal rainwater pumping station. BACKGROUND

[0002] The municipal rainwater pumping station is used to lift the rainwater accumulated in the low-lying areas of the urban area to the urban pipe network or natural water area, and can be divided into an intermediate pumping station and a terminal pumping station. The intermediate pumping station gradually adopts an integrated rainwater pumping station, which improves the construction efficiency and simplifies the operation. Since the rainwater contains silt, the rainwater pumping station needs to be dredged regularly or an automatic dredging device is arranged. For example, the disclosed patent CN111962654A - a municipal rainwater pumping station and a desilting method thereof, which lifts the silt outside the well. For example, the patent document CN213868243U - a full-automatic dredging integrated prefabricated pumping station, which dredges the silt by pumping it out after being dispersed.

[0003] The inventor finds that the existing municipal rainwater pumping station adopts the lifting silt method or the method of pumping out the dispersed silt, which needs to set up an additional power device, increases the energy consumption, and greatly increases the complexity of the system. SUMMARY

[0004] The present application aims at the problem that the existing municipal rainwater pumping station needs to set up an additional power device for dredging in the dredging process. Through the optimization of the structure of the rainwater pumping station, the discharge capacity of the water pump is increased without additional powered dredging devices, and the accumulation of silt in the integrated prefabricated pumping station is reduced.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A municipal rainwater pumping station, comprising a well body and a submersible pump installed in the well body, the well body has two layers, which are a first well bottom layer and a second well bottom layer;

[0007] The first well bottom layer is located above the second well bottom layer, and both the first well bottom layer and the second well bottom layer have a shape of low center and high periphery, each forming an inclined surface from the periphery to the center;

[0008] The center of the first well bottom layer has an opening, and the edge is provided with a water passing hole; the water inlet of the submersible pump is arranged at the opening position; and the second well bottom layer is a closed layer;

[0009] The water outlet position of the rainwater inlet pipe of the well body is arranged at the position of the first well bottom layer and below the water passing hole.

[0010] In one aspect, by the above scheme, the first well bottom layer and the second well bottom layer are both downwardly inclined surfaces, which are conducive to the downward sliding of the settled silt and the concentration of the silt at the bottom for being pumped away by the submersible pump.

[0011] On the other hand, by the above scheme, the second well bottom layer and the first well wall form a space, and the upper layer of the well body is relatively clear water which enters the space through the water passing hole to form a relatively clear water body. The inward space of the first well bottom layer will settle the main silt in the well body to form a relatively turbid water body with a high silt content. At the inlet of the submersible pump, a situation of outer layer of relatively clear water and inner layer of relatively turbid water is formed, which is conducive to the silt in the water flow entering the submersible pump, and the relatively clear water flushing the bottom of the first well bottom layer below the submersible pump to reduce the deposition of silt.

[0012] Further improvement, the shape of the first well bottom layer is an open upward horn type, and the shape of the second well bottom layer is an inverted cone shape.

[0013] Further improvement, the inclined surfaces of the first well bottom layer and the second well bottom layer are smooth surfaces, which are conducive to the sliding and gathering of silt to the center of the bottom.

[0014] Further improvement, the starting water level of the submersible pump is set below the rainwater inlet, and the shutdown water level of the submersible pump is set at a height above the water inlet of the submersible pump.

[0015] Further improvement, the bottom of the second well bottom layer is provided with a bottom support connected with the well wall of the well body.

[0016] Further improvement, the water passing hole is provided with a filter plate to further reduce the amount of silt entering the space below the first well bottom layer.

[0017] Further improvement, a third well bottom layer is additionally provided at the bottom of the well body, and the third well bottom layer is a closed layer.

[0018] Further improvement, an overflow pipe is fixedly provided near the side wall of the well body, and the overflow pipe vertically passes through the first well bottom layer and the second well bottom layer.

[0019] Further improvement, an exhaust pipe is also fixedly provided near the side wall of the well body, and the exhaust pipe vertically passes through the first well bottom layer and the second well bottom layer, and the upper end opening of the exhaust pipe is higher than the upper end opening of the overflow pipe.

[0020] Further improvement, a one-way valve is fixedly installed at the bottom of the second well bottom layer, and the one-way valve allows water to flow from the outside of the second well bottom layer to the inside of the second well bottom layer.

[0021] Through the above improvement, the storage water amount can be adjusted by using the space below the second well bottom layer to improve the adaptability to rainfall.

[0022] The beneficial effects of the present application are:

[0023] (1) By the inclined first well bottom layer and the second well bottom layer, the silt is concentrated at the water inlet of the submersible pump and is removed by the submersible pump, and the deposition of silt is reduced; at the same time, at the inlet of the submersible pump, a situation of relatively clear water on the outside and relatively turbid water on the inside is formed, which is conducive to the silt in the water flow with silt entering the submersible pump, and the bottom of the first well bottom layer below the submersible pump is scoured by the relatively clear water, reducing the deposition of silt.

[0024] (2) The present application reduces the deposition of silt by the inclined first well bottom layer and the second well bottom layer, without the need to increase a powered dredging device, the device is highly simplified, and energy is saved, reducing operating costs.

[0025] (3) By providing the overflow pipe, the space below the second well bottom layer is used to adjust the water storage capacity, increasing the adaptability of the well body to the water inflow. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the municipal rainwater pumping station of the present application embodiment 1;

[0027] Figure 2 is a schematic diagram of the structure of the first well bottom layer and the second well bottom layer of the present application embodiment 1;

[0028] Figure 3 is a schematic diagram of the present application embodiment 1, the viewing angle is the direction from the side;

[0029] Figure 4 is a schematic diagram of the overall structure of the municipal rainwater pumping station of the present application embodiment 2;

[0030] Figure 5 is a schematic diagram of the cross-section of the three-dimensional view of the municipal rainwater pumping station of the present application embodiment 2.

[0031] In the figure: 1. well body; 11. top wall; 12. side wall; 13. bottom support; 2. first well bottom layer; 21. water passage hole; 3. second well bottom layer; 4. submersible pump; 51. rainwater inlet pipe; 52. well outlet pipe; 61. first sensor; 62. second sensor; 71. overflow pipe; 72. exhaust pipe; 8. one-way valve; 9. third well bottom layer. IMPLEMENTATION

[0032] The implementation of the present application will be described in detail below with reference to the drawings and examples, so that the realization process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented. EMBODIMENT

[0033] The municipal rainwater pumping station provided by the present application embodiment 1 has an overall structure as Figure 1As shown, the well body 1 has a top wall 11 and a side wall 12. The bottom of the well body 1 has two layers, a first well bottom layer 2 and a second well bottom layer 3. The first well bottom layer 2 is above the second well bottom layer 3. Both the first well bottom layer and the second well bottom layer have a shape of low center and high periphery, each forming an inclined surface from the periphery to the center. The first well bottom layer 2 has an open bottom end, and the second well bottom layer 3 has a closed bottom end.

[0034] The position of the open bottom end of the first well bottom layer 2 is close to the bottom of the second well bottom layer 3, and is the water inlet position of the submersible pump 4. The outlet of the submersible pump 4 is connected to the well water outlet pipe 52. A water passing hole 21 is provided at the edge of the first well bottom layer 2. A filter plate can also be provided on the upper part of the water passing hole 21 to further reduce the amount of sand and dust entering the space below the first well bottom layer 2.

[0035] The rainwater inlet pipe 51 bends downward after passing through the side wall of the well body above the first well bottom layer 2, and the water outlet is provided below the water passing hole 21.

[0036] Further details are described below.

[0037] The well body 1 is cylindrical and can be made of glass fiber reinforced plastic. The top wall 11 is provided with a manhole, and the side wall 12 is provided with two through holes for the rainwater inlet pipe 51 and the well water outlet pipe 52.

[0038] In combination Figures 1-3 As shown, the bottom of the well body 1 is provided with a bottom support 13 for supporting the second well bottom layer 3. The upper edge of the second well bottom layer 3 is fixed to the side wall 12 of the well body 1, forming a stable support for the second well bottom layer 3. An interlayer support is also provided between the second well bottom layer 3 and the first well bottom layer 2 to support the first well bottom layer 2. The first well bottom layer 2 is provided with a water pump support. The interlayer support and the water pump support are not shown in the figure.

[0039] The first well bottom layer 2 is a trumpet-shaped opening upward, and the second well bottom layer has a shape of an inverted cone. The upper surfaces of the first well bottom layer 2 and the second well bottom layer 3 are smooth surfaces, which are beneficial for the scouring and sliding of the silt. The upper surfaces of the first well bottom layer 2 and the second well bottom layer 3 can be coated with a gel resin or attached with glass scales.

[0040] The first sensor 61 is installed on the surface of the first well bottom layer 2 below the water outlet of the rainwater inlet pipe 51 and can sense water flow and water pressure. The second sensor 62 is installed at the bottom end of the first well bottom layer 2 and above the water inlet of the submersible pump 4 and can sense water pressure. The first sensor 61, the second sensor 62 and the submersible pump 4 are all controlled by the controller. When the first sensor 61 senses water flow, the submersible pump 4 starts. When the first sensor 61 and the second sensor 62 both fail to sense water pressure, the submersible pump 4 is turned off after a delay of half a minute. Alternatively, when the first sensor 61 fails to sense water pressure and the controller determines that the submersible pump 4 is idling for 20 seconds, the submersible pump 4 is turned off.

[0041] Working process:

[0042] In the early stage of rain, the runoff is small, and the rainwater contains a large amount of silt. After the rainwater flows out of the outlet of the rainwater inlet pipe 51, it flows along the first well bottom layer 2 downward, enters the opening position at the bottom end of the first well bottom layer 2, and is collected at the bottom end of the second well bottom layer 3, and is pumped away by the submersible pump 4.

[0043] As the rainfall increases, the runoff becomes larger, and the water level gradually rises to submerge the outlet of the rainwater inlet pipe 51 and reach the position of the overflow hole 21. At this time, at the water inlet position of the submersible pump 4, there is water flow entering the submersible pump 4 from above the first well bottom layer 2, as shown by arrow b, and there is also water flow entering the submersible pump 4 from below the first well bottom layer 2, as shown by arrow c. Since the water flow below the first well bottom layer 2 is continuously pumped away by the submersible pump 4, the water above the water level of the overflow hole 21 flows into the lower part of the first well bottom layer 2 from the overflow hole 21, as shown by arrow d.

[0044] The municipal rainwater pumping station provided by the embodiment 1 is beneficial to increase the sewage discharge capacity of the pump and reduce the accumulation of sludge.

[0045] Firstly, since the first well bottom layer 2 and the second well bottom layer 3 are both downwardly inclined surfaces, the settled silt is beneficial to slide downward and be concentrated at the bottom to be pumped away by the submersible pump 4.

[0046] Secondly, since the water outlet of the rainwater inlet pipe 51 is arranged below the overflow hole 21, in the early stage of rainfall, the rainwater with a high silt content mainly flows downward through the upper space of the first well bottom layer 2 and enters the submersible pump 4, as shown by the flow directions of arrows a and b, which is beneficial to the submersible pump 4 to concentrate the pumping of rainwater containing silt.

[0047] Thirdly, in the middle stage of rainfall, the rainwater enters the submersible pump 4 through both the upper space and the lower space of the first well bottom layer 2. Since the first well bottom layer and the second well bottom layer both form a neck at the bottom, the water flow velocity is increased, which is beneficial to scouring and carrying silt.

[0048] Fourth: because the water hole 21 is set in the upper position of the first well bottom layer, the upper cement sand content is relatively small, and the water is relatively clear. When the relatively clear water flows from the water hole 21 into the space below the first well bottom layer, the silt content of the water in the space below the first well bottom layer is lower than that of the water in the space above the first well bottom layer. Here, the water in the space below the first well bottom layer is referred to as the M water layer, and the space is referred to as the M water layer space. The water layer below the water hole 21 in the space above the first well bottom layer is referred to as the E water layer, and the space is referred to as the E water layer space. The silt content of the M water layer is smaller than that of the E water layer, and the water quality is relatively clear. At the lower end of the E water layer space, the main direction of the water flow with a large silt content is downward, and the main direction of the water flow of the E water layer with a small silt content at the position is horizontal flow to the center. At the inlet of the submersible pump, a situation of relatively clear water in the outer layer and relatively turbid water in the inner layer is formed. The clear water of the E water layer "flushes" the turbid water of the M water layer into the water inlet of the submersible pump 4, which is beneficial to the silt in the water flow of the M water layer with a silt content entering the submersible pump 4, and at the same time, the bottom of the first well bottom layer below the submersible pump is flushed, and the deposition of silt is reduced.

[0049] It should be noted that the improvement target of the municipal rainwater pump station in the embodiment is to increase the sewage discharge capacity of the water pump and reduce the sludge accumulation in the integrated prefabricated pump station without additional powered dredging devices. For processing larger-sized sundries such as branches, leaves, plastic bags, and large pieces of slag, a device such as a grating needs to be arranged to pre-process before entering the well body. Embodiment

[0050] The second embodiment of the application is an improvement on the first embodiment. In the first embodiment, the accumulated sludge is arranged at the bottom end by arranging two inclined surfaces, and the turbid water is accumulated by arranging the E water layer space and the M water layer space, and then the clear water "flushes" the turbid water into the water pump, and the bottom of the first well bottom layer is flushed, which is beneficial to the submersible pump carrying away more silt. However, due to the inclined arrangement of the second well bottom layer 3, the space below the second well bottom layer 3 is idle, and the space is referred to as the K space. The existence of the K space in the first embodiment reduces the water storage capacity of the water pump station and reduces the adaptability to rainfall. The second embodiment of the application is an improvement to solve this problem.

[0051] As shown in Figures 4-5 the first embodiment, an overflow pipe 71 is arranged, the overflow pipe 71 vertically penetrates the first well bottom layer 2 and the second well bottom layer 3, and passes through the K space and the space above the first well bottom layer 2, so that when the water level overflows the overflow pipe 71, the water exceeding the water level is poured into the K space. In order to make the water flow smoothly, an exhaust pipe 72 is arranged, which also vertically penetrates the first well bottom layer 2 and the second well bottom layer 3, and the top end height of the exhaust pipe 72 is higher than that of the overflow pipe 71.

[0052] The lower end of the second well bottom layer 3 is provided with a one-way valve 8 for communication with the K space and the M water layer space, and the one-way valve 8 only allows water to flow from the K space to the M water layer space. When the water pressure on the K space side of the one-way valve 8 is greater than that on the M water layer space side, the one-way valve 8 is opened. When the water pressure on the M water layer space side is greater than that on the K space side, the one-way valve 8 is closed.

[0053] Unlike the embodiment 1, in this embodiment, the bottom support 13 in the embodiment 1 is replaced by a third well bottom layer 9 to close the bottom of the K space.

[0054] Working process:

[0055] When the water level does not exceed the top end of the overflow pipe 71, the one-way valve 8 is closed, and the operation mode is consistent with that of the embodiment 1.

[0056] When the water level exceeds the top end of the overflow pipe 71, water flows into the K space through the overflow pipe 71 until the K space is filled, and if the water level continues to rise to the maximum design water level, an alarm is started or a standby pump station is started.

[0057] When the rainfall intensity decreases and the flow into the well body decreases, the water levels in the E water layer space and the M water layer space decrease. When the water levels in the E water layer space and the M water layer space are lower than the water level in the K space, the one-way valve 8 is opened to allow water to enter the M water layer space.

[0058] Silt mainly enters the submersible pump from the E water layer space, the M water layer space contains less silt, and the K space is used for adjusting flow and draws water from the topmost end of the water layer, containing even less silt.

[0059] By setting the overflow pipe, the K space is set to a water-storing mode, which compensates for the problem of water storage reduction in the embodiment 1.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A municipal rainwater pumping station comprising a well body, a rainwater inlet pipe, a well outlet pipe, and a submersible pump installed in the well body, characterized in that, The well body has two layers, i.e., a first well bottom layer and a second well bottom layer; The first well bottom layer is above the second well bottom layer, and both the first well bottom layer and the second well bottom layer have a shape of low center and high periphery, each forming an inclined surface from the periphery to the center; The first well bottom layer has an opening in the center and a water passing hole in the edge; the opening is arranged at the water inlet of the submersible pump; the second well bottom layer is a closed layer; The water outlet of the rainwater inlet pipe of the well body is arranged at the position of the first well bottom layer and below the water passing hole; The first well bottom layer has a shape of an open upward horn mouth, and the second well bottom layer has a shape of an inverted cone; The starting water level of the submersible pump is arranged below the water outlet of the rainwater inlet pipe, and the closing water level of the submersible pump is arranged at the upper position of the water inlet of the submersible pump; The bottom of the second well bottom layer is provided with a bottom support connected with the well wall of the well body; The bottom of the well body is additionally provided with a third well bottom layer, and the third well bottom layer is a closed layer.

2. The municipal storm water pumping station of claim 1, wherein, The inclined surfaces of the first well bottom layer and the second well bottom layer are smooth surfaces.

3. The municipal storm water pumping station of claim 1, wherein, The water passing hole is provided with a filter plate.

4. The municipal storm water pumping station of claim 1, wherein, An overflow pipe is fixedly arranged near the side wall of the well body, and the overflow pipe vertically passes through the first well bottom layer and the second well bottom layer.

5. The municipal storm water pumping station of claim 4, wherein, An exhaust pipe is also fixedly arranged near the side wall of the well body, and the exhaust pipe vertically passes through the first well bottom layer and the second well bottom layer; the upper end opening of the exhaust pipe is higher than the upper end opening of the overflow pipe.

6. The municipal storm water pumping station of claim 5, wherein, A one-way valve is fixedly installed at the bottom of the second well bottom layer, and the one-way valve allows water to flow from the outside of the second well bottom layer to the inside of the second well bottom layer.

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