Small integrated rainwater pump station
By introducing sandbox and basket grille structures into small integrated rainwater pump stations, the problems of restricted construction sites and high debris are solved, and large flow drainage and submersible pumps are realized, which is suitable for drainage renovation in old districts and villages.
Patent Information
- Application Number
- CN202510782475.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-12
- Publication Date
- 2025-07-18
AI Technical Summary
It is difficult to achieve large-flow drainage in areas where construction sites are limited and the content of debris is high, especially in low-lying areas or unreasonable areas. There is a large amount of water accumulation and debris in rainy days, resulting in limited drainage capacity.
A small integrated rainwater pump station was designed, adopting a sand sink box and a basket grille structure. The sand sink box is equipped with a water overflow outlet and a sand drain port. The drain pipe is connected to the submersible sewage pump. The submersible sewage pump is installed through a self-coupling device. The sand drain check valve and flush pipe are installed in the sand sink box. The basket grille filters light debris, and the submersible sewage pump is compact and easy to inspect and repair.
It realizes large flow drainage in small-diameter pump stations, reduces the wear of debris on submersible sewage pumps, simplifies the maintenance and cleaning process, reduces the construction site area demand, and adapts to the drainage renovation needs of intensive old districts and villages.
Smart Images
Figure CN120331359A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of pumping station equipment, and in particular to a small integrated rainwater pumping station. Background Art
[0002] In the past two years, the urban renewal work has been continuously promoted. Among them, the renovation of three districts and one village (old residential areas, old industrial areas, old blocks and urban villages) is the key point of the work. The renovation work mainly involves multiple projects such as pipeline renovation, elevator installation, parking space addition and auxiliary facilities. The pipeline renovation project covers the renovation tasks of electric wires, gas pipelines, water supply and drainage pipelines, etc. During the renovation process, it is found that in some districts and villages, due to relatively low-lying areas or unreasonable construction, etc., it is extremely easy to have flood problems on rainy days, and active drainage facilities need to be added; and the integrated rainwater pumping station, as a highly integrated, compact and efficient, low-cost and short-construction-period drainage facility, has become the preferred solution for adapting to the renovation project.
[0003] The overall integrated rainwater pumping station is usually set in a cylindrical shape, with a diameter mostly above 2m and a height mostly above 4m. The required site area during construction is mostly between 20 and 30 square meters. Its specific structure mainly includes a drainage chamber at the lower part and a maintenance chamber at the upper part. An inlet pipe is connected at a certain height of the drainage chamber. A grille and a submersible sewage pump are arranged in the drainage chamber. The submersible sewage pump is connected to a drain pipe to actively discharge the rainwater flowing in from the inlet pipe into the designated pipe network or river. Among them, the drainage volume of the submersible sewage pump, etc. should be designed to meet the maximum drainage volume requirement of the area, and at least one is in use and one is in reserve.
[0004] However, it is found in the actual renovation process that the districts and villages prone to flood problems mostly belong to the situation where residential facilities and auxiliary facilities are relatively dense. It is very difficult to plan enough site area in or near the districts and villages for the construction of the rainwater pumping station. The diameter size of the existing integrated rainwater pumping station is difficult to meet this application scenario. Therefore, for the drainage renovation, only a small-diameter rainwater pumping station can be considered to drain into other pipe networks. And also because of its low-lying terrain or unreasonable construction, etc., the required drainage volume is relatively large after the rainwater accumulates on rainy days. In addition, the sanitation arrangement and the management of public area items and vegetation in these district and village areas are mostly not standardized. On rainy days, a lot of sediment, waste paper, plastic bags, leaves and other sundries will be mixed into the rainwater, which poses a more severe test to the drainage capacity of the rainwater pumping station. Therefore, it is necessary to provide an integrated rainwater pumping station that comprehensively considers the pumping station diameter, drainage volume requirement and rainwater sundries situation to solve the above problems. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a small integrated rainwater pumping station with a small diameter, little affected by the construction site area, capable of realizing large-flow drainage, and little affected by the content of sundries.
[0006] To solve the above technical problems, the technical solution of the present invention is: a small integrated rainwater pumping station, including a housing, an inlet and a drain outlet are provided on the housing, the drain outlet is located directly above the inlet, two vertically arranged drain pipes are connected in parallel to the drain outlet, the lower ends of the drain pipes extend horizontally to the middle of the housing, and submersible pumps are respectively installed at the lower ports of the two drain pipes on the housing through self-coupling devices; a sedimentation tank covering the inlet is fixedly provided on the housing, overflow ports are respectively opened on the side walls of the sedimentation tank on both sides of the inlet, and the lower edge of the overflow port is lower than the lowest point of the inlet; basket-type grilles are respectively provided at each overflow port on the sedimentation tank.
[0007] As a preferred technical solution, the bottom wall of the sedimentation tank is in the shape of a concave pit with a low middle and a high periphery, a sand discharge port is provided at the lowest point of the bottom wall of the sedimentation tank, inclined sand discharge pipes are respectively provided between the sand discharge port and the vertical sections of the drain pipes, and sand discharge check valves are provided on the sand discharge pipes; the horizontal section of the drain pipe includes a sand collection section connected to the vertical section of the drain pipe and a pump port section connected to the submersible pump, and the lowest point of the sand collection section is lower than the lowest point of the pump port section.
[0008] As a preferred technical solution, the sand discharge check valve includes a valve body, a sand discharge inlet connected to the sand discharge port through a pipeline and a sand discharge outlet connected to the vertical section of the drain pipe through a pipeline are provided on the valve body, a check valve flap is installed at the sand discharge inlet in the valve body, one end of the check valve flap above the sand discharge inlet is rotatably connected to the valve body, and a check force spring for sealing the check valve flap on the sand discharge inlet is provided between the check valve flap and the valve body.
[0009] As a preferred technical solution, a water level detection device is installed in the housing, and the water level detection device is at least used to detect the low water level for pump stop and the high water level for pump start, the low water level for pump stop is lower than the lower edge of the overflow port, and the height difference between the low water level for pump stop and the lower edge of the overflow port is 0.1 - 0.15 m.
[0010] As a preferred technical solution, the drain pipe passes through the sedimentation tank, a top through pipe orifice is provided on the top wall of the sedimentation tank and a bottom through pipe orifice is provided on the bottom wall.
[0011] As a preferred technical solution, a flushing pipe is provided at the part of the drain pipe inside the sedimentation tank, and a flushing check valve is installed on the flushing pipe.
[0012] As a preferred technical solution, the vertical section of the drain pipe includes a vertical section one above the bottom through pipe orifice and a vertical section two below the bottom through pipe orifice, and the lower end of the vertical section one and the upper end of the vertical section two are jointly flange-connected at the bottom through pipe orifice.
[0013] As a preferred technical solution, the basket-lifting grille includes a laterally arranged fixed grille, a garbage collecting basket is installed on the shell at the port of the fixed grille away from the sand settling box, and the bottom of the garbage collecting basket is lower than the fixed grille; a lifting guide rail is fixedly provided on the shell, and a lifting guide portion corresponding to the lifting guide rail is provided on the garbage collection basket, and a lifting chain is connected to the garbage collection basket.
[0014] As a preferred technical solution, the autocoupling device includes an autocoupling bracket fixedly arranged at the bottom of the shell, the transverse section of the drain pipe is fixedly arranged on the autocoupling bracket, a supporting protrusion is fixedly arranged on the autocoupling bracket at a side of the lower port of the drain pipe close to the siltation box, and a supporting slot is fixedly arranged on the submersible sewage pump. After the supporting slot is buckled on the supporting protrusion, the submersible sewage pump relies on its own gravity to make the water outlet of the submersible sewage pump dock with the lower port of the drain pipe; two autocoupling guide rods are fixedly arranged between the autocoupling bracket and the shell, and the two autocoupling guide rods are located on the side of the supporting slot away from the submersible sewage pump, and the submersible sewage pump is fixedly provided with an autocoupling guide part sleeved on the autocoupling guide rod, and a maintenance lifting ring is provided on the submersible sewage pump at a side of the supporting slot away from the autocoupling guide rod, and the maintenance lifting ring is connected with a maintenance chain.
[0015] Due to the adoption of the above technical solution, a small integrated rainwater pump station includes a shell, the shell is provided with a water inlet and a drain, the drain is located directly above the water inlet, two vertically arranged drain pipes are connected in parallel to the drain, the lower ends of the drain pipes extend horizontally to the middle of the shell, and submersible sewage pumps are installed at the lower ends of the two drain pipes on the shell through autocoupling devices; a sedimentation box with a cover buckled at the water inlet is fixed on the shell, and overflow ports are respectively opened on the side walls of the sedimentation box on both sides of the water inlet, and the lower edge of the overflow port is lower than the lowest point of the water inlet; a basket-type grille is respectively provided on the sedimentation box at each overflow port. The bottom of the shell of the present invention is mainly used to arrange two submersible sewage pumps, and a small space can be used to realize the configuration of a large-flow submersible sewage pump, thereby realizing large-flow drainage. The drain port and the water inlet are on the same side of the shell, and the sand settling box is arranged at the water inlet, so that the incoming water will not directly wash onto the submersible sewage pump, which is conducive to ensuring the long-term and reliable operation of the submersible sewage pump. At the same time, the water flow direction is changed by the sand settling box, and the basket-type grille is arranged at the overflow ports on both sides, which can provide an escape space for the autocoupling device and facilitate the lifting and maintenance of the submersible sewage pump. The basket-type grille can filter most of the light debris in the water, such as plastic bags and leaves, and is convenient for lifting and cleaning, and is less affected by the content of debris. Through the above layout, the diameter of the pump station can be reduced to 1m, and the diameter is small, so it is less affected by the construction site area. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following drawings are only intended to schematically illustrate and explain the present invention, and do not limit the scope of the present invention. Among them: Figure 1 is the structural diagram of an embodiment of the present invention; Figure 2 is Figure 1 the enlarged structural schematic diagram of the submersible sewage pump in; Figure 3 is Figure 2 the state diagram of the submersible sewage pump rotatingly connected with the support protrusion as the fulcrum during the lowering and installation; Figure 4 is Figure 1 the structural schematic diagram of A-A in; Figure 5 is Figure 4 the enlarged structural schematic diagram of one row of sand discharge check valves in; Figure 6 is Figure 5 the state diagram of the check valve flap of the sand discharge check valve being opened; Figure 7 is Figure 1 the enlarged structural schematic diagram of B-B in.
[0017] In the figure: 1 - housing; 11 - water inlet; 12 - drain outlet; 2 - drain pipe; 21 - vertical section; 211 - first vertical section; 212 - second vertical section; 22 - horizontal section; 221 - sand collection section; 222 - pump port section; 23 - drain gate valve; 24 - drain check valve; 25 - flushing pipe; 26 - flushing check valve; 3 - self-coupling device; 31 - self-coupling bracket; 32 - support protrusion; 33 - support card slot; 34 - self-coupling guide rod; 35 - self-coupling guide part; 36 - maintenance lifting ring; 37 - maintenance chain belt; 4 - submersible sewage pump; 5 - sedimentation tank; 51 - overflow port; 52 - sand discharge port; 53 - sand discharge pipe; 54 - sand discharge check valve; 541 - valve body; 542 - sand discharge inlet; 543 - sand discharge outlet; 544 - check valve flap; 6 - basket type grille; 61 - fixed grille; 62 - garbage collection basket; 63 - lifting guide rail. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present invention are described by way of illustration. It is understood that those of ordinary skill in the art can recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of protection of the claims.
[0019] As Figure 1 and Figure 4 shown, the small integrated rainwater pump station includes a housing 1. Conventionally, the housing 1 is integrally in the shape of a hollow cylinder, and its main material can be commonly used fiberglass or high-strength polyethylene, which is not limited herein. The housing 1 is provided with a water inlet 11 and a drain outlet 12. The water inlet 11 is used for rainwater to enter, and the drain outlet 12 is used for discharging the lifted rainwater. Conventionally, the drain outlet 12 is higher than the water inlet 11 to achieve lift drainage.
[0020] In this embodiment, the drain outlet 12 is located directly above the water inlet 11. Two vertically arranged drain pipes 2 are connected in parallel to the drain outlet 12. The drain pipes 2 are used for guiding the pumped rainwater to the drain outlet 12 for discharge. Conventionally, the two drain pipes 2 are connected in parallel at the drain outlet 12 through a tee, and conventionally, a drain gate valve 23 and a drain check valve 24 are respectively installed at the upper ends of the drain pipes 2.
[0021] As Figure 1 , Figure 2 and Figure 3 shown, the lower ends of the drain pipes 2 extend horizontally to the middle part of the housing 1, and submersible pumps 4 are respectively installed at the lower ports of the two drain pipes 2 on the housing 1 through self-coupling devices 3. Thus, the drain pipes 2 in this embodiment are integrally in an L shape, that is, including a vertical section 21 and a horizontal section 22. The submersible pump 4 is connected to the drain pipe 2 through the self-coupling device 3, which is convenient for lifting and maintenance.
[0022] As Figure 2 and Figure 3As shown, the autocoupler 3 includes an autocoupler bracket 31 fixedly arranged at the bottom of the housing 1, the transverse section 22 of the drain pipe 2 is fixedly arranged on the autocoupler bracket 31, and a supporting protrusion 32 is fixedly arranged on the autocoupler bracket 31 at a side of the lower port of the drain pipe 2 close to the sedimentation box 5, and a supporting groove 33 is fixedly arranged on the submersible sewage pump 4. After the supporting groove 33 is buckled on the supporting protrusion 32, the submersible sewage pump 4 relies on its own gravity to make the water outlet of the submersible sewage pump 4 It is docked on the lower port of the drain pipe 2; two autocoupling guide rods 34 are fixedly provided between the autocoupling bracket 31 and the shell 1, and the two autocoupling guide rods 34 are located on the side of the supporting slot 33 away from the submersible sewage pump 4; an autocoupling guide part 35 which is sleeved on the autocoupling guide rod 34 is fixedly provided on the submersible sewage pump 4; a maintenance ring 36 is provided on the submersible sewage pump 4 at the side of the supporting slot 33 away from the autocoupling guide rod 34, and the maintenance ring 36 is connected with a maintenance chain belt 37.
[0023] The two auto-coupling guide parts 35 are usually C-shaped structures with openings facing each other, and are clearance-matched with the auto-coupling guide rod 34; through this sleeve, the slidability of the submersible sewage pump 4 on the auto-coupling guide rod 34 is achieved. Therefore, by manually releasing the maintenance chain belt 37 at the top of the housing 1, the submersible sewage pump 4 can be gradually lowered under the action of its own weight until the support slot 33 is stuck on the support protrusion 32. After continuing to release the maintenance chain belt 37, the submersible sewage pump 4 swings with the support protrusion 32 as the rotation point, and its upper water outlet is docked on the lower port of the drain pipe 2, and remains connected under the action of the submersible sewage pump 4's own weight. During maintenance, by manually pulling the maintenance chain belt 37 at the top of the housing 1, the water outlet of the submersible sewage pump 4 can be disconnected from the docking with the lower port of the drain pipe 2, and the purpose of lifting the submersible sewage pump 4 can be achieved. The structural principle of the above auto-coupling device 3 is easy to understand by those skilled in the art in combination with the prior art, and will not be repeated here.
[0024] like Figure 1 , Figure 4 and Figure 7 As shown, a sand settling box 5 with a cover buckled at the water inlet 11 is fixedly provided on the shell 1, and overflow ports 51 are respectively opened on the side walls of the sand settling box 5 at both sides of the water inlet, and the lower edge of the overflow port 51 is lower than the lowest point of the water inlet 11; a basket-type grille 6 is respectively provided on the sand settling box 5 at each overflow port 51.
[0025] The sand settling box 5 can block the water flow entering from the water inlet 11, prompting large particle sand grains, etc. in the water flow to settle, significantly reducing the amount of sand grains entering the bottom of the housing 1, reducing the wear of the pump impeller of the submersible sewage pump 4, and facilitating the reduction of faults of the submersible sewage pump 4. The water discharged through the two side overflow ports 51 enters the housing 1 after being filtered by the basket type grille 6. Most of the light debris such as internal plastic bags, leaves, waste paper, and woven fabrics can be filtered, reducing the influence of the debris content. Moreover, the basket type grille 6 arranged on the side can avoid the middle space inside the housing 1, thus achieving the avoidance of the self-coupling device 3, especially the self-coupling guide rod 34 in the self-coupling device 3, and the layout is more compact.
[0026] Preferably, the basket type grille 6 includes a horizontally arranged fixed grille 61. A garbage collection basket 62 is installed on the housing 1 at the port of the fixed grille 61 away from the sand settling box 5, and the bottom of the garbage collection basket 62 is lower than the fixed grille 61; A lifting guide rail 63 is fixedly arranged on the housing 1, and a lifting guide part corresponding to the lifting guide rail 63 is arranged on the garbage collection basket 62, and a lifting chain belt is connected to the garbage collection basket 62.
[0027] In this embodiment, the basket type grille 6 is set in two sections. When water overflows at the overflow port 51, the light debris preferentially reaches the fixed grille 61. And when water continuously overflows at the overflow port 51, the water can wash the light debris attached to the fixed grille 61 towards the garbage collection basket 62. Therefore, the sand settling box 5 can maintain a state where the water level can overflow into the housing 1 when it reaches the lower edge of the overflow port 51, which is beneficial to the smooth progress of the sand settling treatment described in the following of this embodiment. Of course, when the water inlet flow is large, the above flushing effect is more obvious. Even when the flow is large enough that the water overflows the sand settling box 5, it is still the water flow that impels the light debris towards the garbage collection basket 62. So ultimately, most of the light debris can enter the garbage collection basket 62, and the garbage can be cleared by regularly lifting the garbage collection basket 62. Among them, the lifting guide of the garbage collection basket 62 can be realized by the wheel rail method or the rod sleeve method, which is not limited here.
[0028] In addition, as Figure 7 shown, the structural layout of the above self-coupling device 3 and basket type grille 6 in this embodiment makes a relatively integral space formed directly above the submersible sewage pump 4. The self-coupling guide rod 34 in the self-coupling device 3 is adjacent to this space, and the two-section setting of the basket type grille 6 also makes the garbage collection basket 62 adjacent to this space, facilitating the lifting operation of the garbage collection basket 62 and the submersible sewage pump 4.
[0029] Preferably, as Figure 1 、 Figure 4 and Figure 7As shown, the drain pipe 2 passes through the grit chamber 5. The top wall of the grit chamber 5 is provided with a top through pipe orifice, and the bottom wall is provided with a bottom through pipe orifice. Thus, the vertical section 21 of the drain pipe 2 can be made of a straight pipe in a limited space, which is conducive to simplifying the manufacturing process. Moreover, the drain pipe 2 passes through the grit chamber 5, which also plays a certain buffering role for the incoming water body, further promoting the settlement of large particle sand grains in the grit chamber 5.
[0030] In this embodiment, the vertical section 21 of the drain pipe 2 includes a vertical section one 211 located above the bottom through pipe orifice and a vertical section two 212 located below the bottom through pipe orifice. The lower end of the vertical section one 211 and the upper end of the vertical section two 212 are jointly flange-connected at the bottom through pipe orifice. This flange connection realizes the sealed connection of the vertical section 21 of the drain pipe 2 at the bottom through pipe orifice. At the same time, the vertical section 21 of the drain pipe 2 can play a supporting role for the grit chamber 5, which is conducive to reducing the arrangement of the support structure.
[0031] Preferably, a flushing pipe 25 is provided at the part of the drain pipe 2 located inside the grit chamber 5, and a flushing check valve 26 is installed on the flushing pipe 25. When the submersible pump 4 is working, the pumped water body is guided to the drain port 12 through the corresponding drain pipe 2. Due to the pumping pressure at the corresponding flushing pipe 25, the flushing check valve 26 opens, which can form a stirring effect on the water body in the grit chamber 5. This is conducive to the floating of the muddy components in the grit chamber 5, prompting the muddy components to overflow into the housing 1 with the water body and then being pumped out by the submersible pump 4. Mainly sedimentation of large particle sand grains is formed in the grit chamber 5, reducing scale formation and also facilitating the smooth sand discharge in the grit chamber 5. Of course, the flushing pipe 25 is preferably in a tangential flushing mode, and the tangential flushing directions of the flushing pipes 25 on the two drain pipes 2 are the same to ensure that stirring can still be formed in the grit chamber 5 when both submersible pumps 4 are working. When the submersible pump 4 is not working, due to the disappearance of the pumping pressure at the flushing check valve 26, the flushing pipe 25 is blocked under the action of its own reset structure.
[0032] Preferably, the bottom wall of the grit chamber 5 is in a concave shape with the middle low and the periphery high, as Figure 4 、 Figure 5 and Figure 6 shown. A sand discharge port 52 is provided at the lowest point of the bottom wall of the grit chamber 5. Oblique sand discharge pipes 53 are respectively provided between the sand discharge port 52 and the vertical sections 21 of the drain pipes 2, and sand discharge check valves 54 are provided on the sand discharge pipes 53; as Figure 1As shown, the horizontal section 22 of the drain pipe 2 includes a sand collection section 221 connected to the vertical section 21 of the drain pipe 2 and a pump port section 222 connected to the submersible sewage pump 4. The low point of the sand collection section 221 is lower than the low point of the pump port section 222. With the above structure, after the sewage discharge is completed, the large particle sand grains settled in the sedimentation tank 5 can enter the horizontal section 22 of the drain pipe 2. More precisely, they are deposited on the sand collection section 221. When the submersible sewage pump 4 works next time, these large particle sand grains can be pumped out together by the pumping action. Thus, the purpose of discharging the large particle sand grains without passing through the submersible sewage pump 4 is achieved, reducing the wear on the pump impeller and other parts of the submersible sewage pump 4. And by flushing and stirring and discharging the sedimented sand grains, the purpose of not needing to clean the sedimentation tank 5 is achieved. The above sand discharge principle will be further described later and will not be elaborated here.
[0033] As Figure 5 and Figure 6 As shown, the sand discharge check valve 54 of this embodiment includes a valve body 541. A sand discharge inlet 542 connected to the sand discharge port 52 through a pipeline and a sand discharge outlet 543 connected to the vertical section 21 of the drain pipe 2 through a pipeline are provided on the valve body 541. A check valve flap 544 is installed at the sand discharge inlet 542 inside the valve body 541. One end of the check valve flap 544 above the sand discharge inlet 542 is rotatably connected to the valve body 541. A check force spring for sealing the check valve flap 544 on the sand discharge inlet 542 is provided between the check valve flap 544 and the valve body 541. In addition to overcoming the gravity of the check valve flap 544, the check force spring additionally provides a certain closing force to keep it closed when the check force spring is not affected by other external forces. In the actual working environment, the sedimentation tank 5 side of the check valve flap 544 is mainly affected by the water pressure in the sedimentation tank 5, and the drain pipe 2 side of the check valve flap 544 is mainly affected by the water pressure in the housing 1 and may be affected by the pumping pressure. When there is no pumping pressure and the pressure difference between the sedimentation tank 5 side and the drain pipe 2 side can overcome the spring force of the check force spring, the check valve flap 544 can be opened to achieve the purpose of discharging sand from the sedimentation tank 5 into the drain pipe 2.
[0034] Conventionally, a water level detection device is installed in the housing 1. The water level detection device is at least used to detect the low water level for pump stop and the high water level for pump start, and the low water level for pump stop is lower than the lower edge of the overflow port. Of course, the water level detection device can also be used to detect the emergency water level, and the emergency water level is higher than the high water level for pump start. The water level detection device can be implemented by one or several of a float type water level gauge, a pressure type water level gauge, and an ultrasonic type water level gauge, and is not limited here.
[0035] Preferably, the height difference between the low-level pump stop water level and the lower edge of the overflow port is 0.1 - 0.15 m. Through this height difference, the required pressure difference is generated on both sides of the check valve flap 544 when the pump stops, thereby achieving the purpose of opening the check valve flap 544 for sand discharge. At the same time, after the check valve flap 544 is opened, the water level difference between the sedimentation tank 5 and the inside of the housing 1 can quickly reach the level where the pressure difference is not sufficient to open the check valve flap 544, and the check valve flap 544 can be quickly closed. On the one hand, this can reduce the large amount of drainage from the sedimentation tank 5 into the drain pipe 2, which is beneficial to ensuring the deposition of large sand particles in the sand collection section 221. On the other hand, when there is water inflow at the water inlet 11 subsequently, it is not easy to open the check valve flap 544, which is beneficial to maintaining the sedimentation function of the sedimentation tank 5.
[0036] In this embodiment, one of the two submersible pumps 4 is in use and the other is in standby. When the water level in the housing 1 reaches the high-level pump start water level, one of the submersible pumps 4 is started. When the water level in the housing 1 reaches the emergency water level, both submersible pumps 4 are started simultaneously. When the water level in the housing 1 reaches the low-level pump stop water level, the submersible pumps 4 all stop. And the two submersible pumps 4 alternate as the first-start pump to extend the service life of the submersible pumps 4. The above one-in-use-one-in-standby principle is easily understood by those skilled in the art in combination with known technologies and will not be elaborated here.
[0037] In rainy weather, rainwater continuously enters through the water inlet 11. The entering rainwater first enters the sedimentation tank 5, and the sedimentation tank 5 plays a role in buffering the water flow. Large sand particles in the rainwater can settle in the sedimentation tank 5. After the water level in the sedimentation tank 5 continues to rise, the water body overflows from the overflow port 51 and flows into the housing 1 after being filtered by the basket strainer 6. Light impurities contained in the water body are filtered by the basket strainer 6, and under the flushing action of the continuously overflowing rainwater, the light impurities reach the garbage collection basket 62, and the garbage can be cleaned later by lifting the garbage collection basket 62. Based on the two-section design of the basket strainer 6, the mesh opening of the basket strainer 6 can be reduced to less than 5 mm × 5 mm, achieving a better filtering effect on light impurities.
[0038] In order to avoid large-weight objects such as glass, metal, and stones being brought in by rainwater, according to the requirements of GB50014-2021 "Outdoor Drainage Design Standard", it is preferred to set a sedimentation tank in the inspection well in front of the pump station to promote the sedimentation of the above large-weight objects in advance.
[0039] Regardless of the size of the water inflow, the water level in the housing 1 keeps rising. When the water level in the housing 1 reaches the high-level pump starting water level, the water level in the housing 1 has already been higher than the sand settling tank 5 at this time. One of the submersible sewage pumps 4 is started, and pumping pressure is generated in the drain pipe 2. The check valve flap 544 in the sand discharge check valve 54 remains in the closed state under the action of its own check force spring and the pumping pressure. The flushing check valve 26 at the flushing pipe 25 is opened due to the pumping pressure to maintain the stirring effect in the sand settling tank 5. During this process, the sand discharge check valve 54 at the sand discharge pipe 53 corresponding to the other submersible sewage pump 4 remains closed under the action of its own check force spring because the water levels on both sides of the check valve flap 544 are the same. Similarly, since there is no pumping pressure in the drain pipe 2 of the other submersible sewage pump 4, the flushing check valve 26 at the corresponding flushing pipe 25 is not opened.
[0040] The muddy components in the sand settling tank 5 are stirred and floated up, and enter the housing 1 along with the water flow, and are finally pumped out by the submersible sewage pump 4. Large granular sand grains are mainly deposited in the sand settling tank 5. The flow of water from the sand settling tank 5 to the housing 1 is maintained at the basket-type grille 6, and the light garbage reaches the garbage collection basket 62 under the action of this water flow.
[0041] When the rainwater inflow rate is large and greater than the drainage flow rate of the submersible sewage pump 4, the water level in the housing 1 continues to rise. When it reaches the emergency water level, the other submersible sewage pump 4 is started.
[0042] When the rainwater inflow rate is less than the drainage flow rate of the submersible sewage pump 4, the water level in the housing 1 will gradually drop and finally reach the low-level pump stop water level. At this time, the submersible sewage pump 4 stops, and the drainage check valve 24 at the upper end of the corresponding drainage pipe 2 prevents the water in the pipe from flowing back. The pumping pressure in the drainage pipe 2 disappears, and the flushing check valve 26 at the flushing pipe 25 resumes closing. In the case where the water in the drainage pipe 2 does not flow back, the water in the vertical section 21 of the drainage pipe 2 remains balanced under the action of negative pressure. The check valve flap 544 in the sediment discharge check valve 54 is mainly affected by the pressure difference between the water pressure on the sedimentation tank 5 side and the water pressure on the drainage pipe 2 side. Of course, at this time, due to the connection of the submersible sewage pump 4, the water pressure on the drainage pipe 2 side is actually the water pressure in the housing 1. The above pressure difference overcomes the spring force of the check valve biasing spring, causing the check valve flap 544 to open. The water in the sedimentation tank 5 drains into the drainage pipe 2, and the water flows reversely through the submersible sewage pump 4 to reach the inside of the housing 1, while large sand particles are deposited in the sand collection section 221. Since the water level difference between the sedimentation tank 5 and the housing 1 is only 0.1 - 0.15 m at the low-level pump stop water level in this embodiment, the water flow during the sand discharge process is relatively slow, and the large sand particles entering the drainage pipe 2 are easily deposited in the sand collection section 221. Moreover, soon the water pressure difference on both sides of the check valve flap 544 reaches a level where it is not sufficient to overcome the spring force of the check valve biasing spring, and the check valve flap 544 closes to stop sand discharge. When rainwater re-enters during rainy days, the rainwater can quickly fill the sedimentation tank 5 and overflow from the overflow port 51, continuing the aforementioned water level rise and drainage operations.
[0043] The above is the working state during the rainy season.
[0044] During the non-rainy season, due to the lack of water inflow for a long time, there is a certain amount of water evaporation in the housing 1 and the sedimentation tank 5, and the water levels in both of them drop to a certain extent. At this time, when it rains and rainwater enters through the inlet pipe, since the rainwater first fills the sedimentation tank 5, the water level in the sedimentation tank 5 is temporarily higher than the water level in the housing 1, and the sediment discharge check valve 54 will open due to the water level pressure difference between the sedimentation tank 5 and the housing 1. At this time, there are two cases.
[0045] One case is that the overall rainwater inflow is small, and since the cross-sectional area of the sedimentation tank 5 is much smaller than that of the housing 1, in the pumping station, the water level in the sedimentation tank 5 drops quickly while the water level in the housing 1 rises slowly. The check valve flap 544 in the sediment discharge check valve 54 quickly reaches a state where the water pressure difference on both sides is not sufficient to open it. During this process, only a very slow water flow can be generated at the horizontal section 22 of the drainage pipe 2, and the large sand particles remain deposited in the sand collection section 221.
[0046] Another situation is that the rainwater flow is large, but because the diameter of the shell 1 described in this embodiment is small, and the cross-section of the sand settling box 5 is even smaller, the rainwater quickly overflows from the sand settling box 5 and enters the shell 1. In this process, the two-stage setting of the basket-type grille 6 described in this embodiment enables the overflow port 51 to overflow in time, and also provides a guarantee for the water pressure on both sides of the check valve flap 544 to be reduced as soon as possible. Therefore, the check valve flap 544 in the drainage check valve 24 also quickly reaches the level where the water pressure difference on both sides is insufficient to open. In this process, only a slightly rapid short-term water flow appears in the transverse section 22 of the drainage pipe 2, and most of the large sand particles are still deposited in the sand collection section 221. A small number of large sand particles may reach the pump inlet section 222 or the inlet of the submersible sewage pump 4, which can be directly pumped away after the submersible sewage pump 4 is turned on, and still has little impact on the pump blades of the submersible sewage pump 4.
[0047] Through the above structural principle, this embodiment achieves the purpose of self-discharge of muddy components and large sand particles in the sand settling box 5, and the sand settling box 5 is not easy to scale, reducing the trouble of cleaning. In addition, whether it is rainy season or non-rainy season, the sand settling box 5 only produces a small amount of drainage to the drain pipe 2 from time to time, realizing slow flow sand discharge, and most of the large sand particles can be discharged without passing through the submersible sewage pump 4, greatly reducing the wear and tear of the submersible sewage pump 4 by large sand particles. This is especially suitable for application scenarios where a large amount of mud and sand is easily mixed in rainwater and difficult to manage at ordinary times.
[0048] This embodiment optimizes the structural layout. The bottom of the housing 1 is mainly used to arrange two submersible sewage pumps 4. A small space can be used to realize the configuration of a large-flow submersible sewage pump 4, thereby realizing large-flow drainage. The drain port 12 and the water inlet 11 are on the same side of the housing 1, and the sand settling box 5 is arranged at the water inlet 11, so that the incoming water will not directly wash onto the submersible sewage pump 4, which is conducive to ensuring the long-term and reliable operation of the submersible sewage pump 4. At the same time, the water flow direction is changed by the sand settling box 5, and the basket-type grille 6 is arranged at the overflow ports on both sides, which can provide a avoidance space for the autocoupling device 3 and facilitate the lifting and maintenance of the submersible sewage pump 4. The basket-type grille 6 can filter most of the light debris such as plastic bags and leaves in the water, and is convenient for lifting and cleaning, and is less affected by the content of debris. The sand settling box 5 adopts flushing cleaning and irregular sand discharge to reduce cleaning troubles. Large particles of sand are discharged before passing through the submersible sewage pump 4, reducing the wear of the submersible sewage pump 4. In this embodiment, through the above optimized layout, the diameter of the pump station can be reduced to 1m. The small diameter is less affected by the construction site area, and the design flow rate can reach 100m 3 / h, which can meet the discharge demand of accumulated water in old residential areas on rainy days and can be used reliably in scenes with a lot of sediment and garbage, which is conducive to solving the drainage reconstruction problem in densely populated old villages.
[0049] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.
Claims
1. Small integrated rainwater pumping station, including a housing, the housing is provided with a water inlet and a drain outlet, characterized in that: The drain outlet is located directly above the water inlet. Two vertically arranged drain pipes are connected in parallel to the drain outlet. The lower ends of the drain pipes extend horizontally to the middle of the housing, and submersible pumps are respectively installed at the lower ports of the two drain pipes on the housing through self-coupling devices; A sedimentation tank covering the water inlet is fixedly arranged on the housing. Overflow ports are respectively arranged on the side walls of the sedimentation tank on both sides of the water inlet, and the lower edge of the overflow port is lower than the lowest point of the water inlet; Basket type grilles are respectively arranged at each overflow port of the sedimentation tank.
2. The small integrated rainwater pump station according to claim 1, characterized in that: The bottom wall of the sedimentation tank is in the shape of a concave pit with a low middle and a high perimeter. A sand discharge port is arranged at the lowest point of the bottom wall of the sedimentation tank. Obliquely arranged sand discharge pipes are respectively arranged between the sand discharge port and the vertical sections of the drain pipes, and sand discharge check valves are arranged on the sand discharge pipes; The horizontal section of the drain pipe includes a sand collection section connected to the vertical section of the drain pipe and a pump port section connected to the submersible pump. The lowest point of the sand collection section is lower than the lowest point of the pump port section.
3. The small integrated rainwater pumping station according to claim 2, characterized in that: The sand discharge check valve includes a valve body. A sand discharge inlet connected to the sand discharge port pipeline and a sand discharge outlet connected to the vertical section of the drain pipe are arranged on the valve body. A check valve flap is installed at the sand discharge inlet in the valve body. One end of the check valve flap above the sand discharge inlet is rotatably connected to the valve body. A check force spring for sealing the check valve flap on the sand discharge inlet is arranged between the check valve flap and the valve body.
4. The small integrated rainwater pumping station according to claim 2, characterized in that: A water level detection device is installed in the housing. The water level detection device is at least used to detect the low water level for pump shutdown and the high water level for pump startup. The low water level for pump shutdown is lower than the lower edge of the overflow port, and the height difference between the low water level for pump shutdown and the lower edge of the overflow port is 0.1 - 0.15m.
5. The small integrated rainwater pump station according to claim 1, characterized in that: The drain pipe passes through the sedimentation tank. A top through pipe orifice is arranged on the top wall of the sedimentation tank and a bottom through pipe orifice is arranged on the bottom wall of the sedimentation tank.
6. The small integrated rainwater pumping station according to claim 5, characterized in that: A flushing pipe is arranged at the part of the drain pipe inside the sedimentation tank, and a flushing check valve is installed on the flushing pipe.
7. The small integrated rainwater pump station according to claim 5, characterized in that: The vertical section of the drain pipe includes a vertical section one above the bottom through pipe orifice and a vertical section two below the bottom through pipe orifice. The lower end of the vertical section one and the upper end of the vertical section two are flange connected to the bottom through pipe orifice together.
8. The small integrated rainwater pumping station according to claim 1, characterized in that: The basket type grille includes a horizontally arranged fixed grille. A garbage collection basket is installed at the port of the housing away from the sedimentation tank of the fixed grille. The bottom of the garbage collection basket is lower than the fixed grille; A lifting guide rail is fixedly arranged on the housing. A lifting guide part corresponding to the lifting guide rail is arranged on the garbage collection basket, and a lifting chain belt is connected to the garbage collection basket.
9. The small integrated rainwater pumping station according to claim 1, characterized in that: The autocoupling device includes an autocoupling bracket fixedly arranged at the bottom of the shell, the transverse section of the drain pipe is fixedly arranged on the autocoupling bracket, a supporting protrusion is fixedly arranged on the autocoupling bracket at a side of the lower port of the drain pipe close to the siltation box, and a supporting slot is fixedly arranged on the submersible sewage pump. After the supporting slot is buckled on the supporting protrusion, the submersible sewage pump relies on its own gravity to make the water outlet of the submersible sewage pump dock with the lower port of the drain pipe; two autocoupling guide rods are fixedly arranged between the autocoupling bracket and the shell, and the two autocoupling guide rods are located on a side of the supporting slot away from the submersible sewage pump, and an autocoupling guide part sleeved on the autocoupling guide rod is fixedly arranged on the submersible sewage pump, and an inspection ring is provided on the submersible sewage pump at a side of the supporting slot away from the autocoupling guide rod, and the inspection ring is connected with an inspection chain.