A small sewage lifting pump station with self-flushing and sludge removal function

Abstract

This utility model discloses a small sewage lifting pump station with self-flushing and sludge removal function, including a pump station body. The pump station body is connected to an inlet pipe and an outlet pipe, and a submersible sewage pump and a liquid level sensor are installed inside the pump station body. The outlet of the submersible sewage pump is connected to the inlet of the outlet pipe, and the submersible sewage pump and the liquid level sensor are connected to an electrical control cabinet. This utility model uses a three-way control valve, an electromagnetic flow sensor, a pneumatic valve, and a self-flushing and sludge removal pipe. During the drainage process, the electromagnetic flow sensor monitors the drainage flow. When the submersible sewage pump is blocked, the outlet pipe can be closed by the three-way control valve and the self-flushing and sludge removal pipe can be connected to flush the inlet of the submersible sewage pump. By combining the alternating switching of the pneumatic valve, the sludge and sand accumulated at the bottom of the pump station can be flushed more effectively using a pulse flushing method, which greatly reduces the frequency of pump station shutdown for sludge removal, thereby greatly reducing the operation and maintenance costs.

Description

Technical Field

[0001] This utility model relates to a small sewage lifting pump station with a self-flushing and sludge-removing function. Background Technology

[0002] Currently, urban sewage lifting pump stations commonly suffer from siltation and pipe blockage, especially those in rural areas. Many pump stations suffer from severe sludge buildup due to design flaws and lack of maintenance, with many even paralyzed or semi-paralyzed. This results in large amounts of untreated sewage being directly discharged into natural water bodies through the pump station's bypass pipes, causing a certain degree of pollution to the local ecological environment.

[0003] Traditional pumping stations, especially small ones distributed in rural areas for sewage lifting, mostly only have a single manual screen, which cannot effectively intercept large fibrous debris in urban sewage, easily causing blockages in submersible pumps. Furthermore, the long-term deposition of sludge and sand carried in urban sewage makes it difficult for these pumping stations to achieve their required flow and head parameters. The published patent CN209874033U incorporates a basket screen, flushing pipes, and agitator in the pumping station design; its process system is more complex and requires advanced operation and maintenance techniques.

[0004] The purpose of this invention is to effectively solve the problems of siltation and blockage in small sewage lifting pump stations in rural towns, improve the reliability and effective operating time of the pump stations, and reduce the operation and maintenance costs of the pump stations. Utility Model Content

[0005] 1. The technical problems to be solved.

[0006] The purpose of this utility model is to solve the problems of traditional small sewage lifting pump stations (especially in rural areas) which are prone to sludge accumulation, pipe blockage, and difficulty in intercepting large particles of debris, leading to submersible sewage pump failure. In addition, the operation and maintenance technology threshold is high, the cost is high, the effective operating time is short, and it is easy to cause direct discharge of sewage and pollute the environment.

[0007] 2. Technical solution.

[0008] To solve the above problems, this utility model provides the following technical solution: a small sewage lifting pump station with self-flushing and sludge removal function, including a pump station body, the pump station body is connected to an inlet pipe and an outlet pipe, and a submersible sewage pump and a liquid level sensor are installed inside the pump station body, the outlet of the submersible sewage pump is connected to the inlet of the outlet pipe, and the submersible sewage pump and the liquid level sensor are connected to an electrical control cabinet. An electromagnetic flow sensor is connected between the inlet of the outlet pipe and the outlet of the submersible sewage pump, and a flushing and sludge removal pipe for flushing the bottom of the pump station body is connected between the inlet of the outlet pipe and the outlet of the submersible sewage pump through a three-way control valve. The lower end of the flushing and sludge removal pipe is equipped with a nozzle, and the lower end of the flushing and sludge removal pipe is also equipped with an adjustment mechanism for adjusting the spray angle of the nozzle.

[0009] 3. Beneficial effects.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the inlet of the submersible sewage pump is easily blocked by silt when the existing pump station is in use. This utility model, through the setting of a three-way control valve, an electromagnetic flow sensor, a pneumatic valve and a self-flushing sludge cleaning pipe, monitors the flow rate through the electromagnetic flow sensor during drainage. When the submersible sewage pump is blocked, the outlet pipe can be closed by the three-way control valve and the self-flushing sludge cleaning pipe can be connected. The self-flushing sludge cleaning pipe is used to flush the inlet of the submersible sewage pump. By combining the alternating switching of the pneumatic valve, the silt and sand accumulated at the bottom of the pump station are flushed in a more effective pulse flushing manner, which greatly reduces the frequency of pump station shutdown for sludge cleaning, thereby greatly reducing the operation and maintenance costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0013] Figure 3 This is a schematic diagram of the connection structure between the nozzle and the connecting pipe of this utility model.

[0014] Figure 4 This is a schematic diagram of the circuit module connection structure of this utility model. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4This utility model discloses a small sewage lifting pump station with self-flushing and sludge removal function, including a pump station body 2. The pump station body 2 is connected to an inlet pipe 1 and an outlet pipe 6. A submersible sewage pump 7 and a liquid level sensor 3 are installed inside the pump station body 2. The outlet of the submersible sewage pump 7 is connected to the inlet of the outlet pipe 6. The submersible sewage pump 7 and the liquid level sensor 3 are connected to an electrical control cabinet 10. A microcontroller (not shown in the figure) is installed inside the electrical control cabinet 10. The liquid level sensor 3 is used to monitor the liquid level inside the pump station body 2. When the liquid level reaches a certain height, the electrical control cabinet 10 obtains the signal from the liquid level sensor 3 and controls the submersible sewage pump 7 to start, pumping the sewage in the pump station body 2 out through the outlet pipe 6.

[0017] The above describes the basic structure of existing sewage lifting pump stations. It is understandable that traditional pump stations, especially small ones distributed across numerous rural towns, mostly only have a single manual screen, which cannot effectively intercept large fibrous debris in urban sewage. This easily leads to blockage of the submersible pump 7's inlet. Furthermore, the long-term deposition of mud, sand, and other contaminants carried in urban sewage makes it difficult for the pump station to achieve its required flow rate and head parameters. Therefore, to solve the above problems and achieve automatic sludge removal of the pump station body 2, the main innovation of this utility model lies in: An electromagnetic flow sensor 14 is connected between the inlet of the outlet pipe 6 and the outlet of the submersible sewage pump 7. A flushing and sludge removal pipe 8 for flushing the sludge at the bottom of the pump station body 2 is connected between the inlet of the outlet pipe 6 and the outlet of the submersible sewage pump 7 through a three-way control valve 5. The three-way control valve 5 is preferably an electric three-way ball valve. The signal input terminal of the three-way control valve 5 is connected to the signal output terminal of the electrical control cabinet 10 to facilitate the opening and closing of the three-way control valve 5.

[0018] With the above-described structure, when the submersible pump 7 discharges water through the outlet pipe 6, the electromagnetic flow sensor 14 monitors the discharge flow rate of the outlet pipe 6. When the monitored data is abnormal, for example, the normal discharge flow rate of the 25QW8-22-1.1 type submersible pump 7 is 8m³ / h - 10m³ / h, but the monitored discharge flow rate is 4m³ / h, it indicates that the inlet of the submersible pump 7 is starting to get blocked. At this time, after the control cabinet 10 obtains the signal from the electromagnetic flow sensor 14, it only needs to control the three-way control valve 5 to close the outlet pipe 6 and simultaneously open the flushing and sludge removal pipe 8. The high-speed water flow provided by the submersible pump 7 is used to fully flush the sludge deposited at the bottom of the pump station. When the flow rate monitored by the electromagnetic flow sensor 14 recovers to the threshold, for example, back to 8m³ / h - 10m³ / h, the pump can switch back to the discharge mode to discharge the suspended mud-water mixture from the pump station.

[0019] To improve the flushing effect, the flushing mechanism of this utility model also includes a pneumatic valve 4. The pneumatic valve 4 is installed on the flushing and sludge removal pipe 8 and is located downstream of the three-way control valve 5 (that is, the third remaining interface after connecting to the water outlet pipe 6 and the submersible pump 7). The signal input terminal of the pneumatic valve 4 is connected to the signal output terminal of the electrical control cabinet 10. The pneumatic valve 4 can be connected to an external air compressor. During the flushing and sludge removal process of the pump station, high-pressure compressed gas and flushing water can be pumped into the flushing and sludge removal pipe 8 by alternately opening and closing the pneumatic valve 4 and the three-way control valve 5, so as to achieve a better pulse flushing effect on the mud and sand accumulated at the bottom of the pump station.

[0020] Furthermore, an electric screen 9 is installed at the connection between the inlet pipe 1 and the pump station body 2. The electric screen 9 is an existing structure that can be raised and lowered by electric power, which will not be described in detail here. When municipal sewage enters the interior of the pump station body 2 from the inlet pipe 1, it first passes through the electric screen 9 to intercept various large particles of impurities in the sewage. When the basket screen rises, it can carry the intercepted large particles of impurities out of the pump station.

[0021] Furthermore, a nozzle 10 is installed at the lower end of the flushing and sludge-removing pipe 8, and an adjustment mechanism is also installed at the lower end of the flushing and sludge-removing pipe 8. The nozzle 10 can be a non-standard part, which can be a single water outlet structure, and the diameter of the water outlet can be set between 1.5-2.5cm, much smaller than the diameter of the water outlet pipe 6 (generally DN50 with a diameter of 50mm), so as to form a high-pressure water column during spraying to ensure the spraying pressure. The adjustment mechanism is used to adjust the spraying direction of the nozzle 10, reduce the spraying blind zone of the nozzle 10, and achieve comprehensive sludge removal at the bottom of the pump station. The following is a specific embodiment of the adjustment mechanism: The adjustment mechanism includes a connecting pipe 81 located at the lower end of the flushing and sludge-removing pipe 8, and a horizontal adjustment structure connecting the flushing and sludge-removing pipe 8 and the connecting pipe 81 for driving the connecting pipe 81 to rotate horizontally; the nozzle 10 is connected to the lower side of the connecting pipe 81 via a rotating head 12, and a telescopic cylinder 11 is connected to the side of the nozzle 10 and the connecting pipe 81. Specifically, as shown... Figure 3 As shown, one end of the rotating head 12 is welded and fixed to the nozzle 10, and the other end of the rotating head 12 is connected to the lower end of the connecting pipe 81 and forms a rotational fit. An O-ring 13 is provided in the rotational gap between the rotating head 12 and the connecting pipe 81.

[0022] The horizontal adjustment structure is used to drive the connecting pipe 81 to rotate horizontally. When the connecting pipe 81 rotates horizontally, it adjusts the spray position of the nozzle 10 in multiple directions (front, back, left, right). When the electrical control cabinet 10 controls the telescopic cylinder 11 to extend and retract, it drives the nozzle 10 to rotate. When the nozzle 10 rotates clockwise, the spray distance decreases, and when the nozzle 10 rotates counterclockwise, the spray distance increases. In use, the horizontal adjustment structure 9 can be used to drive the connecting pipe 81 to rotate horizontally, so that the nozzle 10 rotates in a circle for rinsing. After the rinsing time is set, the telescopic cylinder 11 can be used to drive the nozzle 10 to rotate counterclockwise to increase the rinsing range, so that the nozzle 10 can spray to different positions at the bottom of the pump station.

[0023] Understandably, by default, the nozzle 10 is directed directly toward the inlet of the submersible pump 7. When the submersible pump 7 becomes clogged, the nozzle 10 sprays high-pressure water or compressed air directly toward the inlet of the submersible pump 7. When the submersible pump 7 is unblocked, the three-way control valve 5 can be closed, while the pneumatic valve 4 remains open, and the direction of the nozzle 10 can be adjusted to clean the remaining parts of the pump station.

[0024] Specifically, a rotating head 91 is fixed to the lower end of the connecting pipe 81, and the upper end of the connecting pipe 81 is horizontally rotatably connected to the rotating head 91. A sealing ring is provided between the rotating gap of the connecting pipe 81 and the rotating head 91. The horizontal adjustment structure 9 includes a horizontal adjustment motor 92 fixed to the side of the rotating head 91. A gear 94 is fixed to the output shaft of the horizontal adjustment motor 92, and a gear 93 is fixed to the side of the connecting pipe 81. The gear 93 meshes with the gear 94. In use, the electrical control cabinet 10 controls the horizontal adjustment motor 92 to start. When the output shaft of the horizontal adjustment motor 92 rotates, it drives the gear 94 to rotate. When the gear 94 rotates, it drives the gear 93 to rotate. When the gear 93 rotates, it drives the connecting pipe 81 to rotate.

[0025] It is worth mentioning that the dredging structure of this utility model for realizing the dredging function mainly includes a flushing and dredging pipe 8 installed on the water outlet pipe 6, and a nozzle 10 and adjustment structure integrated at the water outlet at the lower end of the flushing and dredging pipe 8. It occupies little space, has low cost, and is convenient for overall disassembly and maintenance.

[0026] It should be noted that the microcontroller disclosed in the above embodiments is model CMS8S6990N-TSSOP20, the horizontal adjustment motor 92 can be a 57BLDC brushless DC motor, the submersible sewage pump 7 can be a WQ type fixed submersible sewage pump, the liquid level sensor can be a PTL503 submersible static pressure liquid level sensor, the electromagnetic flow sensor 14 can be an LDG-50 electromagnetic flow meter, the electric bar screen 9 can be a GSRL type basket bar screen (gap between 16-25mm), the telescopic cylinder 11 can be an XTL100 type electric telescopic cylinder, the three-way control valve 5 can be a Q941F-16C type electric three-way ball valve, and the pneumatic valve 4 can be an SCG551A001MS type two-position five-way single solenoid valve. Furthermore, the microcontroller controls the horizontal adjustment motor 92, the submersible sewage pump 7, the electric basket bar screen 9, the telescopic cylinder 11, the three-way control valve 5, and the pneumatic valve 4 using methods commonly used in the prior art, which will not be described in detail here.

[0027] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small sewage lifting pump station with self-flushing and sludge removal function, comprising a pump station body, wherein the pump station body is connected to an inlet pipe and an outlet pipe, and a submersible sewage pump and a liquid level sensor are installed inside the pump station body, wherein the outlet of the submersible sewage pump is connected to the inlet of the outlet pipe, and the submersible sewage pump and the liquid level sensor are connected to an electrical control cabinet, characterized in that: An electromagnetic flow sensor is connected between the inlet of the outlet pipe and the outlet of the submersible sewage pump, and a flushing and sludge removal pipe for flushing the bottom of the pump station body is connected between the inlet of the outlet pipe and the outlet of the submersible sewage pump through a three-way control valve. The lower end of the flushing and sludge removal pipe is equipped with a nozzle, and the lower end of the flushing and sludge removal pipe is also equipped with an adjustment mechanism for adjusting the spray angle of the nozzle.

2. A small sewage lifting pump station with self-flushing and sludge removal function as described in claim 1, characterized in that: It also includes a pneumatic valve, which is installed on the flushing and sludge removal pipe and located downstream of the three-way control valve, and the signal input terminal of the pneumatic valve is connected to the signal output terminal of the electrical control cabinet.

3. A small sewage lifting pump station with self-flushing and sludge removal function as described in claim 1, characterized in that: The three-way control valve is an electric three-way ball valve, and the signal input terminal of the three-way control valve is connected to the signal output terminal of the electrical control cabinet.

4. A small sewage lifting pump station with self-flushing and sludge removal function as described in claim 1, characterized in that: An electric screen is installed at the connection between the water inlet pipe and the pump station body.

5. A small sewage lifting pump station with self-flushing and sludge removal function as described in claim 1, characterized in that: The adjustment mechanism includes a connecting pipe disposed at the lower end of the flushing and sludge removal pipe and a horizontal adjustment structure connected between the flushing and sludge removal pipe and the connecting pipe for driving the connecting pipe to rotate horizontally. The nozzle is connected to the lower side of the connecting pipe via a rotating head, and a telescopic cylinder is connected to the side of the nozzle and the connecting pipe.

6. A small sewage lifting pump station with self-flushing and sludge removal function as described in claim 5, characterized in that: The lower end of the connecting pipe is fixed with a rotating head, and the upper end of the connecting pipe is rotatably connected to the rotating head. The horizontal adjustment structure includes a horizontal adjustment motor fixed on the side of the rotating head. The output shaft of the horizontal adjustment motor is fixed with a gear one, and the side of the connecting pipe is fixed with a gear two. The gear two is meshed with the gear one.

7. A small sewage lifting pump station with self-flushing and sludge removal function as described in claim 1, characterized in that: The nozzle has an outlet diameter between 1.5 and 2.5 cm.

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