Submersible sewage pump cleaning device, submersible sewage pump and submersible sewage pump cleaning method

Abstract

The invention relates to a submersible sewage pump cleaning device, a submersible sewage pump and a submersible sewage pump cleaning method.The cleaning device comprises a cleaning component, the cleaning component comprises a plurality of cleaning holes formed in a pump body and communicating with a pumping chamber and a liquid supply assembly providing cleaning liquid for the cleaning holes, and each cleaning hole is provided with a first blocking structure; the first blocking structure is used for selectively conducting or blocking the cleaning hole and the pumping chamber; the sewage discharging component comprises a sewage storage container communicated with the bottom of the pumping chamber and a second blocking structure used for selectively conducting or blocking the sewage storage container and the pumping chamber, the part, connected with the pumping chamber, of the sewage storage container is located below the pumping chamber, and the volume of the part, located below the pumping chamber, of the sewage storage container is larger than that of the pumping chamber. According to the device, sewage in the pumping chamber can be temporarily discharged into the sewage storage container, and the cleaning hole, the inner wall surface of the pumping chamber and the impeller are exposed, so that the pumping chamber and the impeller can be washed even under water, the cleaning cost is reduced, and the cleaning efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of submersible pump technology, and in particular to a submersible pump cleaning device, a submersible pump, and a submersible pump cleaning method. Background Technology

[0002] Submersible sewage pumps are widely used in urban sewage, industrial wastewater, domestic sewage, and underground facility drainage. Because they operate in harsh environments for extended periods, they require regular maintenance and upkeep, such as impeller replacement and manual dredging. Manual dredging is particularly problematic; whenever the concentration of sludge inside the pump becomes too high, the pump must be pulled out of the water and the sludge removed manually. After cleaning, the pump is then returned to the water. This process is not only time-consuming and labor-intensive, increasing maintenance costs and difficulty, but also significantly increases the complexity of maintenance.

[0003] To reduce equipment maintenance costs and complexity, many submersible pumps and systems designed to prevent internal sludge buildup have emerged. For example, cutting or spray mechanisms are installed at the pump inlet to break down or dilute large materials, thus reducing sludge buildup and extending impeller life. However, after prolonged operation, significant amounts of sludge still accumulate inside the pump, requiring manual cleaning. This process remains time-consuming, labor-intensive, costly, and difficult. Summary of the Invention

[0004] Based on this, the present invention provides a submersible sewage pump cleaning device, a submersible sewage pump, and a submersible sewage pump cleaning method to solve the problems of time-consuming and labor-intensive cleaning, high maintenance costs, and high maintenance difficulty of existing submersible sewage pumps.

[0005] On one hand, the present invention provides a submersible sewage pump cleaning device. The submersible sewage pump includes a pump body and an impeller. The pump body is provided with a pressure chamber, and the impeller is located in the pressure chamber. The pump body is provided with an inlet structure and an outlet structure. The submersible sewage pump cleaning device includes:

[0006] A cleaning component includes a plurality of cleaning holes disposed on the pump body and communicating with the pressure chamber, and a liquid supply assembly for providing pressurized cleaning fluid to each of the cleaning holes. Each of the cleaning holes is provided with a first blocking structure, which is used to selectively open or close the cleaning hole and the pressure chamber.

[0007] The sludge discharge component includes a sludge storage container communicating with the bottom of the pressure chamber and a second blocking structure for selectively opening or blocking the sludge storage container and the pressure chamber, wherein the portion of the sludge storage container connected to the pressure chamber is located below the pressure chamber, and the volume of the portion of the sludge storage container located below the pressure chamber is at least greater than the volume of the pressure chamber.

[0008] In one embodiment, the sludge storage container includes a U-shaped tube, which includes a connecting section, a sludge storage section, and a pressure relief section connected in sequence. The connecting section is connected to the pressure chamber, and the pressure relief section extends above the liquid surface.

[0009] In one embodiment, the water inlet structure includes a water inlet blocking structure and a water inlet;

[0010] The water inlet is located at the bottom of the pressure chamber, the connecting section is connected to the water inlet, the second blocking structure is located between the connecting section and the sludge storage section, and the volume of the sludge storage container located on the side of the second blocking structure away from the water inlet and below the pump body is at least greater than the volume of the pressure chamber.

[0011] The sludge storage container is also provided with a water inlet branch pipe, which is connected between the water inlet and the second blocking structure. The water inlet blocking structure is provided on the water inlet branch pipe.

[0012] In one embodiment, a flow monitoring device is provided in the sewage storage section or on the second blocking structure.

[0013] In one embodiment, along the height direction of the pump body, at least one layer of cleaning hole group is provided on the pump body, and each layer of the cleaning hole group includes a plurality of cleaning holes spaced apart along the circumferential direction of the pump body.

[0014] In one embodiment, the included angles between each of the cleaning holes and the inner wall surface of the pressure chamber are the same or different, and at least a portion of the cleaning holes face the impeller.

[0015] In one embodiment, at least a portion of the cleaning hole faces the inner wall of the pressure chamber.

[0016] In one embodiment, the first blocking structure includes a valve disc movably connected to the outlet of the cleaning port and an elastic member applying an elastic force to the valve disc. The valve disc is used to block the cleaning port under the elastic force of the elastic member and to open the cleaning port against the elastic force of the elastic member under the impact force of the cleaning fluid; or

[0017] The first blocking structure includes an electrically controlled valve disposed within the cleaning port; or

[0018] The first blocking structure includes a one-way valve disposed in the cleaning hole, the one-way valve being unidirectionally open from the cleaning hole to the pressure chamber.

[0019] In one embodiment, the liquid supply assembly includes:

[0020] The main supply pipe is used to introduce the cleaning solution.

[0021] A liquid supply branch pipe is circumferentially arranged on the outside of the pump body and opposite to each of the cleaning holes. Each of the cleaning holes is connected to the liquid supply branch pipe through a transition assembly. The liquid supply branch pipe is also connected to the liquid supply main pipe.

[0022] A power unit, which is installed on the liquid supply main pipe, is used to drive the cleaning fluid.

[0023] On the other hand, the present invention also provides a submersible sewage pump, which includes the submersible sewage pump cleaning device of any of the above embodiments, and

[0024] The pump body has a pressure chamber inside and an inlet and outlet structure on its surface.

[0025] An impeller is disposed in the pressure chamber;

[0026] An electric motor, mounted on the pump body, is used to drive the impeller;

[0027] The controller is electrically connected to the motor, the second blocking structure of the submersible pump cleaning device, and the liquid supply assembly.

[0028] A liquid level monitoring device, which is electrically connected to the controller, is used to monitor the liquid level in the sewage tank.

[0029] Furthermore, the present invention also provides a method for cleaning a submersible sewage pump, which uses the aforementioned submersible sewage pump and includes the following steps:

[0030] When the liquid level monitoring device detects that the sewage level is equal to or lower than the stopping height of the submersible pump, the motor, inlet structure and outlet structure are closed, the second blocking structure is opened, and the pressure chamber and the sewage storage container are connected, so that the residual sewage in the pressure chamber is discharged into the sewage storage container.

[0031] When the liquid supply assembly is activated, it provides pressurized cleaning fluid to each cleaning hole. The first blocking structure opens, and the cleaning fluid is sprayed from the cleaning hole into the pressure chamber. The cleaning fluid flushes the inner wall of the pressure chamber and the impeller.

[0032] After cleaning, the liquid supply assembly and the first blocking structure are shut off;

[0033] When the liquid level monitoring device detects that the sewage level is higher than the stopping height of the submersible pump, the motor starts, the inlet blocking structure and the outlet structure open, and the sewage in the sewage tank and the sewage in the storage container are pumped into the pressure chamber. After the sewage in the storage container is pumped out, the second blocking structure is closed.

[0034] Compared with the prior art, the present invention has at least the following beneficial effects:

[0035] This application, by setting a sludge storage container below the pressure chamber to form a communication device with the pressure chamber, allows the sewage in the pressure chamber to be temporarily discharged into the sludge storage container, exposing the cleaning hole, the inner wall of the pressure chamber, and the impeller. This enables the pressure chamber and impeller to be flushed even underwater without having to take the submersible pump out of the water, reducing the time and cost of manual cleaning, improving cleaning efficiency, and promptly cleaning the dirt inside the submersible pump, ensuring the normal operation of the submersible pump and guaranteeing its working efficiency. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of a submersible sewage pump cleaning device in one embodiment;

[0037] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0038] Figure 3 This is a top view of a submersible pump cleaning device in one embodiment.

[0039] The reference numerals in the accompanying drawings include: pump body 1, pressure chamber 101, impeller 2, cleaning hole 3, first blocking structure 4, sludge storage container 5, connecting section 501, sludge storage section 502, pressure relief section 503, second blocking structure 6, water inlet 7, water inlet blocking structure 8, water inlet branch pipe 9, main liquid supply pipe 10, liquid supply branch pipe 11, power unit 12, motor 13, liquid level monitoring device 14, water outlet 15, adapter 16, connecting pipe 17, support frame 18, bracket 19. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0041] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention.

[0042] The structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0043] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "lateral," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] As described in the background section, after prolonged operation, existing submersible sewage pumps accumulate a significant amount of sediment inside. This sediment not only easily causes blockages within the pump but also damages the impeller. Consequently, manual cleaning of the submersible sewage pump is frequently required. However, manual cleaning typically involves lifting the submersible sewage pump from underwater, disassembling and cleaning it, and then lowering it back into the water. The entire cleaning process is time-consuming and labor-intensive, resulting in high maintenance costs and significant maintenance difficulties.

[0045] To address the aforementioned problems, this invention provides a submersible sewage pump cleaning device. The submersible sewage pump includes a pump body 1 and an impeller 2. The pump body 1 has a pressure chamber 101, and the impeller 2 is located within the pressure chamber 101. The pump body 1 is equipped with an inlet structure and an outlet structure. The submersible sewage pump cleaning device includes:

[0046] The cleaning component includes a plurality of cleaning holes 3 disposed on the pump body 1 and communicating with the pressure chamber 101, and a liquid supply assembly for providing pressurized cleaning fluid to each cleaning hole 3. Each cleaning hole 3 is provided with a first blocking structure 4, which is used to selectively open or block the cleaning hole 3 and the pressure chamber 101.

[0047] The sludge unloading component includes a sludge storage container 5 communicating with the bottom of the pressure chamber 101 and a second blocking structure 6 for selectively opening or closing the sludge storage container 5 and the pressure chamber 101. The portion of the sludge storage container 5 connected to the pressure chamber 101 is located below the pressure chamber 101, and the volume of the portion of the sludge storage container 5 located below the pressure chamber 101 is at least greater than the volume of the pressure chamber 101.

[0048] According to the submersible sewage pump cleaning device of the present invention, when it is necessary to clean the inside of the submersible sewage pump, the inlet and outlet structures of the submersible sewage pump are first closed, so that the pressure chamber 101 is in a closed state. At this time, sewage remains in the pressure chamber 101 of the submersible sewage pump. Then, the second blocking structure 6 is opened to connect the pressure chamber 101 and the sewage storage container 5, so that the pressure chamber 101 and the sewage storage container 5 form a communicating vessel. At this time, the sewage remaining in the pressure chamber 101 can be discharged into the sewage storage container 5. And since the volume of the part of the sewage storage container 5 located below the pressure chamber 101 is at least larger than the volume of the pressure chamber 101, all the sewage in the pressure chamber 101 can be discharged into the sewage storage container 5, thereby exposing the cleaning hole 3, the inner wall of the pressure chamber 101 and the impeller 2.

[0049] Then, pressurized cleaning fluid is injected into each cleaning hole 3 through the liquid supply assembly. The first blocking structure 4 is opened, and the cleaning fluid is sprayed out from each cleaning hole 3. The sprayed cleaning fluid can wash away the mud and scale on the impeller 2 and the inner wall of the pressure chamber 101, thereby cleaning the pressure chamber 101 and the impeller 2.

[0050] After cleaning is completed, the liquid supply component and the first blocking structure 4 are closed, the water inlet structure and the water outlet structure are opened, and the submersible sewage pump is started. The submersible sewage pump can pump the sewage in the sewage storage container 5 together with the sewage in the sewage tank to the pressure chamber 101 and discharge it outward. After the sewage in the sewage storage container 5 is discharged, the second blocking structure 6 is closed to isolate the sewage storage container 5 and the pressure chamber 101, in preparation for the next cleaning and sewage discharge of the submersible sewage pump.

[0051] This submersible sewage pump cleaning device, by setting a sewage storage container 5 below the pressure chamber 101 and combining it with the pressure chamber 101 to form a communicating vessel, allows sewage in the pressure chamber 101 to be temporarily discharged into the sewage storage container 5, exposing the cleaning hole 3, the inner wall of the pressure chamber 101 and the impeller 2. This allows the pressure chamber 101 and the impeller 2 to be flushed even underwater, without having to take the submersible sewage pump out of the water, reducing the time and cost of manual cleaning, improving cleaning efficiency, and promptly cleaning the dirt inside the submersible sewage pump, ensuring the normal operation of the submersible sewage pump and guaranteeing its working efficiency.

[0052] The submersible pump cleaning device provided in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] It should be noted that since the submersible sewage pump cleaning device provided in this embodiment is used to clean the submersible sewage pump, the structure and function of this cleaning device need to be described in conjunction with the submersible sewage pump. Therefore, the structure of the submersible sewage pump will be described by example below.

[0054] For example, in Figure 1In the example, the submersible pump is a vertical pump, mainly comprising a pump body 1, an impeller 2, and a motor 13. The motor 13 is mounted on the upper end of the pump body 1. The pump body 1 has a pressure chamber 101 inside, and the impeller 2 is located inside the pressure chamber 101 and is connected to the motor 13 for transmission. The pump body 1 is also equipped with an inlet structure and an outlet structure.

[0055] Based on the submersible sewage pump with the above-described structure, the submersible sewage pump cleaning device provided in this embodiment is mainly used for cleaning the pressure chamber 101 and impeller 2 of the submersible sewage pump. Specifically, according to... Figure 1 An exemplary embodiment of a submersible pump cleaning device according to at least one embodiment of the present invention is shown. The submersible pump cleaning device includes a cleaning component and a sludge discharge component.

[0056] The waste discharge component is used to discharge the residual wastewater in the pressure chamber 101 during cleaning, thereby exposing the cleaning hole 3, the inner wall of the pressure chamber 101 and the impeller 2, so as to facilitate the cleaning of the pressure chamber 101 and the impeller 2 of the submersible pump.

[0057] For example, see Figure 1 The waste discharge component includes a waste storage container 5, which is connected to the bottom of the pressure chamber 101. The portion of the waste storage container 5 connected to the pressure chamber 101 is located below the pressure chamber 101, and the volume of the portion of the waste storage container 5 below the pressure chamber 101 is at least greater than the volume of the pressure chamber 101. This configuration allows the waste storage container 5 and the pressure chamber 101 to communicate, forming a communicating vessel. During cleaning, residual wastewater in the pressure chamber 101 can be discharged downwards into the waste storage container 5 under the influence of gravity and pressure. Since the volume of the portion of the waste storage container 5 below the pressure chamber 101 is at least greater than the volume of the pressure chamber 101, the waste storage container 5 can hold at least all the wastewater in the pressure chamber 101, allowing the water in the pressure chamber 101 to be emptied. This ensures that the cleaning hole 3, the pressure chamber 101, and the impeller 2 are fully exposed, providing a basis for underwater online cleaning of the pressure chamber 101 and the impeller 2.

[0058] In this embodiment, the wastewater storage container 5 can be a chamber structure located below the pump body 1 or a pipe structure located below the pump body 1. As long as it can temporarily store the wastewater discharged from the pressure chamber 101 during cleaning, its shape and type are not limited.

[0059] See Figure 1In this embodiment, the sludge storage container 5 is preferably a U-shaped tube, with one end connected to the bottom of the pressure chamber 101 and the other end being a free end. This configuration allows the U-shaped sludge storage container 5 to connect the pressure chamber 101 and the sludge storage container 5 to form a U-shaped communicating vessel. The small cross-sectional area of ​​the U-shaped communicating vessel allows for more sensitive flow of sewage within it, providing a basis for accurately determining whether the sewage in the pressure chamber 101 has been completely drained. It also allows for the rapid re-injection of temporarily discharged sewage into the pressure chamber 101 after cleaning, ensuring the stable operation of the submersible pump system.

[0060] Furthermore, in this embodiment, the diameter and length of the U-shaped pipe satisfy the condition that the volume of the U-shaped pipe located below the pump body 1 is greater than the volume of the pressure chamber 101. For example, see [reference needed]. Figure 1 With the bottom surface of the pump body 1 as the boundary, the volume of the part of the U-shaped pipe located below the bottom surface of the pump body 1 is greater than the volume of the pressure chamber 101, ensuring that the U-shaped pipe can at least absorb all the sewage in the pressure chamber 101.

[0061] See Figure 1 In this embodiment, based on the functions of each part of the sludge storage container 5, the interior of the U-shaped pipe can be divided into a connecting section 501, a sludge storage section 502, and a pressure relief section 503. As the names suggest, the connecting section 501 connects the sludge storage container 5 to the pressure chamber 101; the sludge storage section 502 is the main part of the sludge storage container 5 used for temporary storage of sludge; and the pressure relief section 503 is the part that releases pressure from the sludge storage container 5, allowing sludge to be smoothly discharged into the sludge storage container 5. It should be understood that in actual use, when the pressure chamber 101 discharges sludge, the connecting section 501 and the pressure relief section 503 will also store sludge.

[0062] For details, see Figure 1 The connecting section 501 is a vertical section within the U-shaped pipe. The port of this connecting section 501 is connected to the bottom of the pressure chamber 101 to achieve communication between the sludge storage container 5 and the pressure chamber 101. For example, in... Figure 1 In the example, the water inlet structure of the submersible pump includes an inlet 7, which is located at the bottom of the pump body 1. By connecting the port of the connecting section 501 to the inlet 7 at the bottom of the pump body 1, the connection between the sludge storage container 5 and the pressure chamber 101 can be achieved.

[0063] See Figure 1The sludge storage section 502 is a horizontal section of a U-shaped pipe, with its two ends connected to the connecting section 501 and the pressure relief section 503, respectively. A second blocking structure 6 is provided on the sludge storage section 502. The second blocking structure 6 is used to either connect or disconnect the sludge storage section 502 from the pressure chamber 101. For example, during normal sewage discharge, the second blocking structure 6 is closed to disconnect the sludge storage section 502 from the pressure chamber 101, ensuring that sewage is discharged outward through the pressure chamber 101. During underwater cleaning of the submersible pump, the second blocking structure 6 is opened to ensure that residual sewage in the pressure chamber 101 can be discharged into the sludge storage section 502.

[0064] See Figure 1 In this embodiment, to ensure that the inlet 7 smoothly draws in sewage, the sewage storage container 5 is also connected to an inlet branch pipe 9. The inlet branch pipe 9 connects the second blocking structure 6 of the U-shaped pipe to the inlet 7 of the submersible sewage pump. The inlet structure of the submersible sewage pump also includes an inlet blocking structure 8, for example, an electric flap gate. This inlet blocking structure 8 is located at the port of the inlet branch pipe 9 and is used to connect or block the inlet branch pipe 9 and the sewage tank. Based on this, when discharging sewage, closing the second blocking structure 6 and opening the inlet blocking structure 8 can achieve normal sewage discharge from the sewage tank. With this configuration, the sewage discharge of the submersible sewage pump and the unloading of the pressure chamber 101 share a single pipeline and a single inlet. This not only facilitates the suction of sewage from the storage container 5 into the pressure chamber 101 along with the sewage from the sewage tank after cleaning, making the back suction operation smoother, but also reduces the structural modification of the submersible sewage pump body 1, thus lowering the modification cost of the submersible sewage pump system.

[0065] In addition, in the above structural design, the second blocking structure 6 shifts the blocking position between the sludge storage container 5 and the pressure chamber 101 to the sludge storage section 502, so that when the pressure chamber 101 discharges sewage, the sewage discharged into the sludge storage container 5 will move to the sludge storage section 502. Based on this, in order to ensure that the pressure chamber 101 is emptied, in this embodiment, the volume of the part of the sludge storage container 5 located on the side of the second blocking structure 6 away from the submersible sewage pump and below the submersible sewage pump should be greater than the volume of the pressure chamber 101, that is, the volume of the part of the U-shaped pipe on the left side of the second blocking structure 6 and below the submersible sewage pump should be greater than the volume of the pressure chamber 101.

[0066] In this embodiment, the second blocking structure 6 can be an electrically controlled valve, which is automatically controlled by the controller, making operation simpler and more convenient.

[0067] Furthermore, in this embodiment, the sewage storage container 5 is also equipped with a flow monitoring device, such as a flow meter. The flow monitoring device can be installed on the pipe section of the sewage storage section 502, or it can be integrated into the second blocking structure 6. In addition, the flow monitoring device is electrically connected to an external controller, so that it can provide real-time feedback of the sewage flow status at the sewage storage section 502 to the controller.

[0068] Based on the above structural design, the flow monitoring device can monitor the sewage flow rate at the sewage storage section 502. During the cleaning and unloading of the submersible pump, as the sewage from the pressure chamber 101 is discharged into the sewage storage container 5, the flow monitoring device can detect a large flow rate value. The controller controls the second blocking structure 6 to remain open based on this flow rate value, ensuring that the sewage from the pressure chamber 101 can be continuously discharged into the sewage storage container 5. When the flow monitoring device detects a small flow rate value (less than the calibrated value) or 0, it indicates that the sewage is in a static state in the sewage storage container 5, and all the sewage from the pressure chamber 101 has been discharged into the sewage storage container 5. At this time, the controller can control the cleaning... The submersible pump is cleaned by washing the components. After the submersible pump is cleaned, the sewage in the sewage storage container 5 will be pumped back into the pressure chamber 101. During the pumping process, the flow monitoring device will also detect a large flow value. The controller can keep the second blocking structure 6 open. As the sewage in the sewage storage container 5 is gradually pumped into the pressure chamber 101, the flow value detected by the flow monitoring device will become smaller and smaller. When the detected flow value is less than a certain value or close to 0, it means that all the sewage on the left side of the second blocking structure 6 has been pumped into the pressure chamber 101. At this time, the second blocking structure 6 can be closed to prepare for the next cleaning.

[0069] See Figure 1 In this embodiment, the pressure relief section 503 is another vertical pipe section of the U-shaped pipe, and the port of the pressure relief section 503 extends upward beyond the liquid surface of the sewage tank. For example, the height of the pressure relief section 503 is designed to be higher than the height of the sewage tank, which can ensure that when the submersible sewage pump is installed in the sewage tank, the port of the pressure relief section 503 can extend beyond the liquid surface. This setting facilitates the connection between the sewage storage container 5 and the atmosphere through the pressure relief section 503, thereby facilitating the pressure relief of the submersible sewage pump pressure chamber 101, so that the sewage in the pressure chamber 101 can be smoothly discharged into the sewage storage container 5.

[0070] Further, see Figure 1 The bottom of the submersible pump is also equipped with a support frame 18. The bottom of the support frame 18 is lower than the sewage storage container 5. The support frame 18 supports the submersible pump, which can prevent the sewage storage container 5 from being stressed and ensure the stable operation of the submersible pump.

[0071] In this embodiment, the cleaning component is used to clean the submersible pump. See also Figure 1 The cleaning components specifically include a liquid supply assembly and multiple cleaning holes 3.

[0072] In this embodiment, the cleaning hole 3 is provided on the side wall of the pump body 1 and is connected to the pressure chamber 101, so that the cleaning fluid can be sprayed into the pressure chamber 101 through the cleaning hole 3.

[0073] In this embodiment, the number of cleaning holes 3 can be set according to the model and specifications of the submersible pump, for example, see Figure 1This only exemplarily shows a group of cleaning holes on the pump body 1, see [link / reference]. Figure 3 The cleaning hole group has six cleaning holes 3, and the six cleaning holes 3 are distributed at intervals along the circumferential direction of the pump body 1. This arrangement can ensure that each cleaning hole 3 sprays water onto the pressure chamber 101 more comprehensively, reducing cleaning dead corners.

[0074] It should be understood that in other embodiments, the number of layers of the cleaning hole group distributed along the vertical direction of the pump body 1 can be more, such as two layers, three layers, etc., and the number of cleaning holes 3 in each layer can also be other, such as five, seven, eight, etc.

[0075] Furthermore, in this embodiment, the included angle between each cleaning hole 3 and the inner wall surface of the pressure chamber 101 is the same or different, that is, the tilt angle of each cleaning hole 3 is the same or different, and at least some of the cleaning holes 3 face the impeller 2.

[0076] For example, see Figure 1 and Figure 2 In one example, the impeller 2 is located at the top of the pressure chamber 101. All cleaning holes 3 face upward toward the impeller 2 and are tilted upward at the same angle. This allows each cleaning hole 3 to concentrate on rinsing the impeller 2, which has a strong cleaning focus, improves the cleanliness of the impeller 2, avoids damage to the impeller 2 caused by sludge, and can reduce the maintenance frequency of the impeller 2 and reduce maintenance costs.

[0077] Furthermore, in this embodiment, at least a portion of the cleaning holes 3 face the inner wall surface of the pressure chamber 101.

[0078] For example, in one example, each cleaning hole 3 can be divided into two parts. One part of the cleaning holes 3 is tilted upwards and aligned with the impeller 2, while the other part of the cleaning holes 3 is tilted upwards and / or horizontally and / or tilted downwards and aligned with the inner wall surface of the pressure chamber 101. In this way, both targeted cleaning of the impeller 2 and cleaning of the inner wall surface of the pressure chamber 101 can be ensured.

[0079] Furthermore, when the inclination angles of the cleaning holes 3 are different, the cleaning holes 3 with the same inclination angle can be arranged in a uniform distribution. For example, in a layer of six cleaning holes 3, three cleaning holes 3 are aligned with the impeller 2, and the other three cleaning holes 3 are aligned with the inner wall of the pressure chamber 101. Then, the three cleaning holes 3 aligned with the impeller 2 and the three cleaning holes 3 aligned with the inner wall of the pressure chamber 101 can be arranged in an alternating manner. Another example is having two layers of cleaning holes 3, with the upper layer aligned with the impeller 2 and the lower layer aligned with the inner wall of the pressure chamber 101. This improves the uniformity of water spray from each cleaning hole 3 and enhances the cleaning effect.

[0080] See Figure 2In this embodiment, each cleaning hole 3 is provided with a first blocking structure 4. The first blocking structure 4 is used to selectively open or close the cleaning hole 3 and the pressure chamber 101. For example, when cleaning is required, the first blocking structure 4 is opened, allowing the cleaning hole 3 and the pressure chamber 101 to be connected, and the cleaning fluid can be sprayed into the pressure chamber 101 to clean the submersible pump. When discharging sewage, the first blocking structure 4 is closed, blocking the cleaning hole 3 and the pressure chamber 101, ensuring the sealing of the pressure chamber 101, ensuring the hydraulic performance during sewage discharge, and preventing sewage from flowing back into the cleaning hole 3. Thus, the first blocking structure 4 ensures both the hydraulic performance of the submersible pump during sewage discharge and the cleaning function.

[0081] See Figure 2 In this embodiment, the first blocking structure 4 includes a valve disc movably connected to the outlet of the cleaning hole 3 and an elastic element that applies an elastic force to the valve disc. The valve disc can block the cleaning hole 3 under the elastic force of the elastic element, or it can open the cleaning hole 3 by overcoming the elastic force of the elastic element under the impact force of the cleaning fluid. Thus, the valve disc can be automatically opened and closed by the elastic element and the impact force of the cleaning fluid, resulting in a simple structure and convenient control.

[0082] For details, see Figure 2 In this embodiment, the valve disc can be an arc-shaped plate that fits the arc-shaped contour of the inner wall of the pressure chamber 101, and this plate can at least cover the outlet of the cleaning hole 3, so that the valve disc can fit at the outlet of the cleaning hole 3, ensuring the sealing effect of the valve disc on the cleaning hole 3. More specifically, the valve disc is rotatably installed at the outlet of the cleaning hole 3 by means of a pin, thereby opening and closing the outlet of the cleaning hole 3 by flipping the valve disc. For example, in Figure 2 In the example, when the valve disc flips upward, it opens the cleaning hole 3, while when the valve disc flips downward to reset, it blocks the cleaning hole 3.

[0083] In this embodiment, the elastic element is used to control the flipping of the valve disc. For example, the elastic element is a torsion spring set on the pin. The torsion spring has a preload force on the pin or the valve disc that rotates clockwise. In the initial state, that is, when the valve disc is not subjected to the impact force of the cleaning fluid, the valve disc can be blocked at the outlet of the cleaning hole 3 under the action of the elastic force of the torsion spring, thereby blocking the cleaning hole 3 and the pressure chamber 101. After the pressurized cleaning fluid is introduced into the cleaning hole 3, the cleaning fluid has a rightward impact force on the valve disc. This impact force can overcome the elastic force of the torsion spring and push the valve disc open, thereby making the cleaning hole 3 and the pressure chamber 101 open.

[0084] Based on the above structural design, the valve disc is flipped by the impact force of the torsion spring and the cleaning fluid, thereby opening or closing the cleaning hole 3. The structure is simple and easy to control, which can ensure the hydraulic performance of the submersible pump during sewage discharge and also ensure the cleaning function.

[0085] Of course, in some other embodiments, the first blocking structure 4 can also be an existing miniature valve structure. For example, the first blocking structure 4 can be an electrically controlled valve, which is automatically controlled by a controller to achieve automatic switching between opening and closing of the cleaning hole 3 outlet; or, for example, the first blocking structure 4 can be a one-way valve, which is unidirectionally open from the cleaning hole 3 to the pressure chamber 101 to achieve the introduction of cleaning fluid and prevent the backflow of sewage.

[0086] In this embodiment, the liquid supply assembly is used to provide pressurized cleaning fluid to each cleaning hole 3, so that each cleaning hole 3 can spray cleaning fluid to flush the impeller 2 and the pressure chamber 101. Specifically, see... Figure 1 The liquid supply assembly includes a power unit 12, a main liquid supply pipe 10, and a branch liquid supply pipe 11.

[0087] The main supply pipe 10 is used to connect to an external water source to provide cleaning fluid to the supply assembly. For example, the inlet end of the main supply pipe 10 extends upward to the top of the sewage tank and connects to a ground-level storage container or ground-level pipeline, thereby introducing external cleaning fluid to the supply assembly. In this embodiment, the cleaning fluid can specifically be tap water, recycled sewage, or an aqueous solution containing chemical agents.

[0088] The power unit 12 is used to drive the flow of cleaning fluid and provide pressure to the cleaning fluid. For example, in this embodiment, the power unit 12 can be a high-pressure jet pump. The high-pressure jet pump is located on the liquid supply main pipe 10. The high-pressure jet pump can provide high pressure driving force to the cleaning fluid in the liquid supply main pipe 10, ensuring that the cleaning fluid can be sprayed out from the cleaning hole 3 at a high pressure, thereby improving the flushing effect on the impeller 2 and the pressure chamber 101.

[0089] In this embodiment, the supply branch pipe 11 is used to evenly distribute the cleaning fluid introduced by the supply main pipe 10 to each cleaning port 3. For example, see... Figure 3 The supply branch pipe 11 is circumferentially arranged around the outside of the pump body 1 and faces the outer end of each cleaning hole 3, and a transition assembly is provided between the supply branch pipe 11 and each cleaning hole 3. See Figure 2 and Figure 3 The adapter assembly includes an adapter 16 and a connecting pipe 17. One end of the connecting pipe 17 is connected to the outside of the pump body 1 via a threaded connection and communicates with the cleaning hole 3. The other end of the connecting pipe 17 is connected to the liquid supply branch pipe 11 via the adapter 16. (See attached diagram) Figure 3 The adapter 16 can be selected as a tee or an elbow depending on the location of the cleaning hole 3. At the same time, the lower end of the main liquid supply pipe 10 and the branch liquid supply pipe 11 are also connected by a tee.

[0090] Based on the above-mentioned structural design of the liquid supply assembly, when the submersible pump needs to be cleaned, the power unit 12 is started, and the power unit 12 pumps the cleaning fluid to the main liquid supply pipe 10. The cleaning fluid first flows into the branch pipe 11 along the main liquid supply pipe 10, and then flows into each cleaning hole 3 along the branch pipe 11, thereby realizing the liquid supply to each cleaning hole 3.

[0091] Further, see Figure 1 An electric control valve is also installed on the liquid supply main pipe 10. The electric control valve is used to control the opening or closing of the liquid supply main pipe 10 so as to control the flow of cleaning fluid.

[0092] Further, see Figure 1 The pump body 1 is also equipped with a bracket 19, which is a two-part structure. One half is connected to the pump body 1 by bolts, and the other half is integrated with the liquid supply main pipe 10. The two are finally connected by bolts to support the cleaning pipeline.

[0093] On the other hand, embodiments of the present invention also provide a submersible sewage pump, which includes: a pump body 1, a motor 13, an impeller 2, a liquid level monitoring device 14, a controller, and a submersible sewage pump cleaning device provided in any of the above embodiments.

[0094] See Figure 1 In this embodiment, the submersible pump has a vertical structure, the motor 13 is installed at the upper end of the pump body 1, the pump body 1 has a pressure chamber 101 inside, the impeller 2 is located in the pressure chamber 101 and is connected to the motor 13 for transmission.

[0095] The pump body 1 is equipped with an inlet structure and an outlet structure. The inlet structure includes an inlet 7 and an inlet blocking structure 8. The inlet 7 is located at the bottom of the pump body 1, and the sludge storage container 5 of the cleaning device is connected to the inlet 7. The inlet blocking structure 8 is an electric flap valve, located at the port of the inlet branch pipe 9. The outlet structure includes an outlet 15 and an outlet blocking structure. The outlet 15 is located on the side of the pump body 1, and the outlet blocking structure is located at the outlet 15. The outlet blocking structure can be an electrically controlled valve or a check valve.

[0096] The controller is electrically connected to the motor 13, the water inlet blocking structure 8, the second blocking structure 6 in the cleaning device, and the power unit 12, and is used to control the operation of the submersible sewage pump system.

[0097] The liquid level monitoring device 14 is electrically connected to the controller. The liquid level monitoring device 14 is used to monitor the liquid level in the sewage tank. For example, the liquid level monitoring device 14 can be an existing float level gauge. The controller can control the start and stop of the submersible sewage pump based on the liquid level height of the sewage tank fed back by the liquid level monitoring device 14. For example, if the liquid level monitoring device 14 detects that the sewage level is equal to or lower than the stop height of the submersible sewage pump, it controls the submersible sewage pump to stop; if it is higher than the stop height, it controls the submersible sewage pump to operate normally.

[0098] The principle of this submersible sewage pump is as follows:

[0099] When the liquid level monitoring device 14 detects that the sewage level is higher than the stopping height of the submersible pump, the controller controls the submersible pump system to discharge sewage, the electric flap door opens, the second blocking structure 6 closes, the motor 13 starts, and the sewage in the sewage tank is sucked into the inlet branch pipe 9, then enters the pressure chamber 101, and is discharged from the outlet 15.

[0100] When the liquid level monitoring device 14 detects that the sewage level is equal to or lower than the stopping height of the submersible sewage pump, the controller controls the submersible sewage pump system to perform self-cleaning, the motor 13 stops, the electric flap door closes, the second blocking structure 6 opens, and the sewage in the pressure chamber 101 is discharged into the sewage storage container 5. When the flow monitoring device detects that the flow rate of sewage in the sewage storage container 5 is less than the calibrated value, the power unit 12 is started, the electric control valve on the liquid supply main pipe 10 is opened, the cleaning fluid is pumped to each cleaning hole 3, and finally overcomes the elastic force of the torsion spring to push the valve disc open and spray it into the pressure chamber 101 to flush the inside of the submersible sewage pump.

[0101] After the submersible pump has been cleaning for a specified period of time, the controller shuts down the cleaning device, the power unit 12 stops, and the electrically controlled valve on the liquid supply main pipe 10 closes.

[0102] When the level monitoring device 14 detects again that the sewage level is higher than the stop height of the submersible pump, the controller controls the submersible pump system to discharge sewage. The electric flap door opens, the motor 13 starts, and the sewage from the sewage tank and storage container 5 is sucked into the pressure chamber 101 and then discharged from the outlet 15. When the flow monitoring device detects that the flow rate of sewage in the storage container 5 is less than the calibrated value, the second blocking structure 6 closes.

[0103] Furthermore, embodiments of the present invention also provide a self-cleaning method for a submersible sewage pump, which is executed using the submersible sewage pump provided in the above embodiments, and includes the following steps:

[0104] When the liquid level monitoring device 14 detects that the sewage level is equal to or lower than the stopping height of the submersible pump, the motor 13, the inlet structure and the outlet structure are closed, the second blocking structure 6 is opened, and the pressure chamber 101 and the sewage storage container 5 are connected, so that the residual sewage in the pressure chamber 101 is discharged into the sewage storage container 5.

[0105] After the pressure chamber 101 is emptied, the cleaning hole 3, the inner wall of the pressure chamber 101 and the impeller 2 are exposed.

[0106] When the liquid supply assembly is activated, it provides pressurized cleaning fluid to each cleaning hole 3. The first blocking structure 4 is opened, and the cleaning fluid is sprayed from the cleaning hole 3 into the pressure chamber 101. The cleaning fluid washes the inner wall of the pressure chamber 101 and the impeller 2.

[0107] After cleaning is completed, the liquid supply assembly and the first blocking structure 4 are shut off.

[0108] When the level monitoring device 14 detects that the sewage level is higher than the stop height of the submersible pump again, the motor 13 starts, the inlet blocking structure 8 and the outlet structure open, and the sewage in the sewage tank and the sewage storage container 5 are pumped into the pressure chamber 101 and discharged from the outlet 15.

[0109] After the sewage in the sewage storage container 5 is pumped out, the second blocking structure 6 is closed to isolate the sewage storage container 5 from the pressure chamber 101, in preparation for the next cleaning and unloading of the submersible sewage pump.

[0110] This cleaning method enables underwater self-cleaning of submersible sewage pumps without having to remove them from underwater, reducing the time and cost of manual cleaning, improving cleaning efficiency, and controlling the start and stop of the cleaning device by starting and stopping the sewage pump, ensuring timely removal of dirt from the pump and guaranteeing its normal operation and working efficiency.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A submersible sewage pump cleaning device, the submersible sewage pump comprising a pump body (1) and an impeller (2), wherein the pump body (1) is provided with a pressure chamber (101), the impeller (2) is located within the pressure chamber (101), and the pump body (1) is provided with an inlet structure and an outlet structure; characterized in that, The submersible pump cleaning device includes: The cleaning component includes a plurality of cleaning holes (3) disposed on the pump body (1) and communicating with the pressure chamber (101) and a liquid supply assembly for providing pressurized cleaning fluid to each of the cleaning holes (3). Each of the cleaning holes (3) is provided with a first blocking structure (4), which is used to selectively open or block the cleaning hole (3) and the pressure chamber (101). The sludge discharge component includes a sludge storage container (5) communicating with the bottom of the pressure chamber (101) and a second blocking structure (6) for selectively opening or closing the sludge storage container (5) and the pressure chamber (101), wherein the portion of the sludge storage container (5) connected to the pressure chamber (101) is located below the pressure chamber (101), and the volume of the portion of the sludge storage container (5) located below the pressure chamber (101) is at least greater than the volume of the pressure chamber (101).

2. The submersible pump cleaning device according to claim 1, characterized in that, The sludge storage container (5) includes a U-shaped tube, which includes a connecting section (501), a sludge storage section (502), and a pressure relief section (503) connected in sequence. The connecting section (501) is connected to the pressure chamber (101), and the pressure relief section (503) is used to extend above the liquid surface.

3. The submersible pump cleaning device according to claim 2, characterized in that, The water inlet structure includes a water inlet blocking structure (8) and a water inlet (7); The inlet (7) is located at the bottom of the pressure chamber (101), the connecting section (501) is connected to the inlet (7), the second blocking structure (6) is located between the connecting section (501) and the sludge storage section (502), and the volume of the sludge storage container (5) located on the side of the second blocking structure (6) away from the inlet (7) and below the pump body (1) is at least greater than the volume of the pressure chamber (101); The sludge storage container (5) is also provided with a water inlet branch pipe (9), which is connected between the water inlet (7) and the second blocking structure (6), and the water inlet blocking structure (8) is provided on the water inlet branch pipe (9).

4. The submersible pump cleaning device according to claim 2, characterized in that, A flow monitoring device is installed in the sewage storage section (502) or on the second blocking structure (6).

5. The submersible pump cleaning device according to claim 1, characterized in that, Along the height direction of the pump body (1), at least one layer of cleaning hole group is provided on the pump body (1), and each layer of the cleaning hole group includes a plurality of cleaning holes (3) spaced apart along the circumferential direction of the pump body (1).

6. The submersible pump cleaning device according to claim 1, characterized in that, The included angles between each of the cleaning holes (3) and the inner wall surface of the pressure chamber (101) are the same or different, and at least part of the cleaning holes (3) are oriented toward the impeller (2).

7. The submersible sewage pump cleaning device according to claim 6, characterized in that, At least a portion of the cleaning hole (3) faces the inner wall of the pressure chamber (101).

8. The submersible pump cleaning device according to claim 1, characterized in that, The first blocking structure (4) includes a valve disc movably connected to the outlet of the cleaning hole (3) and an elastic element that applies an elastic force to the valve disc. The valve disc is used to block the cleaning hole (3) under the elastic force of the elastic element and to open the cleaning hole (3) against the elastic force of the elastic element under the impact force of the cleaning fluid; or The first blocking structure (4) includes an electrically controlled valve disposed within the cleaning hole (3); or The first blocking structure (4) includes a one-way valve disposed in the cleaning hole (3), which is unidirectionally open from the cleaning hole (3) to the pressure chamber (101).

9. The submersible pump cleaning device according to claim 1, characterized in that, The liquid supply assembly includes: Liquid supply main pipe (10) is used to introduce cleaning fluid; A liquid supply branch pipe (11) is arranged circumferentially around the outside of the pump body (1) and opposite to each of the cleaning holes (3). Each of the cleaning holes (3) is connected to the liquid supply branch pipe (11) through a transition assembly. The liquid supply branch pipe (11) is also connected to the liquid supply main pipe (10). A power unit (12) is provided on the liquid supply main pipe (10) for driving the cleaning fluid.

10. A submersible sewage pump, characterized in that, Including the submersible pump cleaning device according to any one of claims 1-9, and Pump body (1), the pump body (1) is provided with a pressure chamber (101) inside, and the pump body (1) is provided with a water inlet structure and a water outlet structure; Impeller (2), which is disposed in the pressure chamber (101); An electric motor (13) is mounted on the pump body (1) and is used to drive the impeller (2); The controller is electrically connected to the motor (13) and the second blocking structure (6) of the submersible pump cleaning device, as well as the liquid supply assembly; A liquid level monitoring device (14), which is electrically connected to the controller, is used to monitor the liquid level of the sewage tank.

11. A method for cleaning a submersible sewage pump, characterized in that, The submersible pump according to claim 10 includes the following steps: When the liquid level monitoring device (14) detects that the sewage level is equal to or lower than the stop height of the submersible pump, the motor (13), the inlet structure and the outlet structure are closed, the second blocking structure (6) is opened, and the pressure chamber (101) and the sewage storage container (5) are connected, and the residual sewage in the pressure chamber (101) is discharged into the sewage storage container (5). When the liquid supply assembly is started, it provides pressurized cleaning fluid to each cleaning hole (3). The first blocking structure (4) is opened, and the cleaning fluid is sprayed from the cleaning hole (3) into the pressure chamber (101). The cleaning fluid washes the inner wall surface of the pressure chamber (101) and the impeller (2). After cleaning, the liquid supply assembly and the first blocking structure (4) are shut off; When the liquid level monitoring device (14) detects that the sewage level is higher than the stop height of the submersible pump, the motor (13) starts, the inlet blocking structure (8) and the outlet structure are opened, and the sewage in the sewage tank and the sewage in the sewage storage container (5) are pumped into the pressure chamber (101). After the sewage in the sewage storage container (5) is pumped out, the second blocking structure (6) is closed.

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