Novel mechanical seal flushing device for submersible sewage pump

Abstract

The utility model relates to the technical field of submersible sewage pumps, in particular to a novel submersible sewage pump mechanical seal flushing device which comprises a pump body and a mechanical seal arranged in the pump body, and a connecting cavity is formed in the pump body. And a circulating flushing assembly used for removing impurities on the mechanical seal is arranged in the connecting cavity and comprises a sealing cover arranged in the connecting cavity, a spraying ring is fixedly connected to the periphery of the sealing cover, and a connecting channel is formed in the pump body. By arranging the circulating flushing assembly, when the submersible sewage pump is used, the micro water pump is started to be matched with the pipeline to pump cleaning liquid in the storage box, and the cleaning liquid is sprayed in the inner cavity of the sealing cover through the spraying ring, so that a mechanical seal located in the middle of the sealing cover is flushed, and impurity particles located on the mechanical seal are taken away; and cleaning liquid impurities can be filtered in time in the process that the cleaning liquid impurities enter the storage box, so that the cleaning liquid can be recycled conveniently, and the whole device can circularly flush the mechanical seal in real time.

Description

Technical Field

[0001] This utility model relates to the field of submersible sewage pump technology, and in particular to a novel submersible sewage pump mechanical seal flushing device. Background Technology

[0002] Submersible sewage pumps are a type of pump specifically designed for conveying wastewater containing solid particles, fibrous materials, and high viscosity and corrosiveness. They are widely used in municipal engineering, industrial wastewater treatment, building drainage, and mine drainage. The mechanical seal of a submersible sewage pump mainly consists of a rotating ring, a stationary ring, an elastic compensation mechanism (such as a spring), and auxiliary sealing rings. Its working principle is that the elastic component (such as a spring) and the pressure of the medium cause the end faces of the rotating ring and the stationary ring to fit tightly together, forming an extremely thin liquid film, thereby achieving a seal.

[0003] During long-term use, when handling media containing solid particles such as mud, sand, and fibers, the mechanical seal end face is prone to wear and even failure due to particle deposition, resulting in leakage. The medium can then enter the motor and damage the submersible pump. Most submersible pumps do not have a device to treat particles on the mechanical seal end face. Therefore, the risk of leakage and damage is greatly increased during long-term use, leading to a higher frequency of mechanical seal replacement.

[0004] Therefore, a novel submersible sewage pump mechanical seal flushing device is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a novel submersible sewage pump mechanical seal flushing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel submersible pump mechanical seal flushing device, comprising a pump body and a mechanical seal disposed in the pump body, wherein the pump body is provided with a connecting cavity; the connecting cavity is provided with a circulating flushing assembly for removing impurities on the mechanical seal, the circulating flushing assembly including a sealing cover disposed in the connecting cavity, a spray ring fixedly connected to the periphery of the sealing cover, the pump body is provided with a connecting channel, and a storage tank for storing cleaning fluid is fixedly installed on the pump body.

[0007] Preferably, the sealing cover has an inclined surface, and the mechanical seal is located in the middle of the inner cavity of the sealing cover.

[0008] Preferably, the pump body has a circular groove for discharging cleaning fluid from inside the sealing cover to the outside, and the circular groove is connected to the connecting channel.

[0009] Preferably, a miniature water pump is fixedly installed in the connecting cavity, and the miniature water pump is connected to both the spray ring and the storage tank by pipes. The miniature water pump and the pipes work together to draw up the cleaning fluid in the storage tank and apply pressure to deliver it to the spray ring.

[0010] Preferably, the spray ring has a spray cavity, and the spray cavity has a plurality of spray holes that extend to the inner wall of the sealing cover.

[0011] Preferably, a circular buckle plate is fixedly installed in the storage box, and a circular frame is fixedly connected to the bottom of the circular buckle plate. Several filter screens are fixedly installed on the circular frame, and the filter screens are used to filter impurities so that the cleaning liquid can be recycled.

[0012] Preferably, the storage box is provided with a feeding port, and when the circular buckle plate and circular frame are installed in the storage box, the horizontal position of the filter screen is lower than the horizontal position of the connecting channel.

[0013] The beneficial effects of this utility model are:

[0014] This invention features a circulating flushing assembly. When the submersible pump is in use, a micro water pump works with the pipeline to draw up the cleaning fluid from the storage tank. The fluid is then sprayed through a spray ring into the inner cavity of the sealing cover, flushing the mechanical seal located in the center of the sealing cover. This removes impurities and particles from the mechanical seal, preventing wear and tear that could damage the pump. As the cleaning fluid enters the storage tank, impurities are filtered, facilitating its recycling. The entire device not only provides real-time circulating flushing of the mechanical seal but is also site-independent, achieving the flushing purpose regardless of the location. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a novel submersible sewage pump mechanical seal flushing device according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic cross-sectional view of the pump body of a novel submersible sewage pump mechanical seal flushing device according to an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of the pump body portion of a novel submersible sewage pump mechanical seal flushing device according to an embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional structural diagram of the sealing cover of a novel submersible sewage pump mechanical seal flushing device according to an embodiment of the present invention;

[0020] Figure 5This is a schematic diagram of the storage box structure of a novel submersible sewage pump mechanical seal flushing device according to an embodiment of the present invention.

[0021] The following are marked in the diagram: 1. Pump body; 2. Mechanical seal; 3. Connecting cavity; 4. Sealing cover; 401. Spray ring; 5. Connecting channel; 6. Storage box; 7. Inclined surface; 8. Circular groove; 9. Miniature water pump; 10. Pipeline; 11. Spraying inner cavity; 12. Spray hole; 13. Circular buckle plate; 14. Circular frame; 15. Filter screen; 16. Feed port. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figures 1 to 5As shown in the figure, a specific embodiment of this utility model provides a novel submersible sewage pump mechanical seal flushing device, including a pump body 1 and a mechanical seal 2 disposed in the pump body 1. The pump body 1 is provided with a connecting cavity 3; the connecting cavity 3 is provided with a circulating flushing component for removing impurities from the mechanical seal 2. By setting the circulating flushing component, the mechanical seal 2 can be flushed, and the impurities and particles present on its surface and end face can be washed away and carried out of the pump body 1, so that the mechanical seal 2 will not be damaged by mechanical wear. At the same time, the cleaning fluid can also cool the mechanical seal 2 while flushing it, so that the mechanical seal 2 is cooled during pump body 1 operation. The heat generated by friction can be carried away to some extent, and the cooling can ensure the stability of the fluid film on the sealing end face. If the end face temperature is too high, the viscosity of the liquid film will decrease, or it may even vaporize or break down, leading to wear of the sealing end face and sealing failure. In addition, the flushing is a circulating flushing, and the cleaning fluid is recycled, so there is no need to add cleaning fluid in real time, thereby avoiding waste. The circulating flushing component includes a sealing cover 4 provided in the connecting cavity 3. A spray ring 401 is fixedly connected to the periphery of the sealing cover 4. A connecting channel 5 is provided in the pump body 1, and a storage tank 6 for storing cleaning fluid is fixedly installed on the pump body 1.

[0025] like Figures 2 to 4 As shown, specifically, a miniature water pump 9 is fixedly installed in the connecting cavity 3. Pipes 10 connect the miniature water pump 9 to both the spray ring 401 and the storage tank 6. The miniature water pump 9 and pipes 10 work together to draw up the cleaning fluid from the storage tank 6 and apply pressure to deliver it to the spray ring 401. The spray ring 401 has a spray cavity 11 with several spray holes 12 extending to the inner wall of the sealing cover 4. The mechanical seal 2 is located in the middle of the inner cavity of the sealing cover 4. During rinsing, the micro water pump 9 is started. The micro water pump 9 draws the cleaning fluid stored in the storage tank 6 through the pipe 10 and gradually discharges the cleaning fluid into the spray cavity 11 in the spray ring 401 through the pipe 10. Under the action of the micro water pump 9, the cleaning fluid has a certain pressure. The cleaning fluid that does not accumulate in the spray cavity 11 is gradually sprayed out through the spray hole 12. That is, the cleaning fluid is sprayed in the inner cavity of the sealing cover 4, thereby rinsing the mechanical seal 2 located in the middle.

[0026] like Figures 2 to 5As shown, specifically, the sealing cover 4 has an inclined surface 7, and the pump body 1 has a circular groove 8. The circular groove 8 is used for the internal cleaning fluid of the sealing cover 4 to be discharged outward. The circular groove 8 is connected to the connecting channel 5. In the inner cavity of the sealing cover 4, the cleaning fluid gradually rinses the mechanical seal 2, washing away the small amount of impurities and other particles on its surface. As the cleaning fluid flows downward to the inclined surface 7, it gradually flows towards the bottom center of the sealing cover 4 through the inclined surface 7, and then gradually flows into the circular groove 8. At this time, the mixture of cleaning fluid and impurities gradually enters the connecting channel 5 through the circular groove 8. A circular buckle plate 13 is fixedly installed in the storage box 6, and a circular frame 14 is fixedly connected to the bottom of the circular buckle plate 13. Several filter screens 15 are fixedly installed on the circular frame 14. The filter screens 15 are used to filter impurities so that the cleaning liquid can be recycled. The mixture of cleaning liquid and impurities flows in the connecting channel 5 and gradually flows outward, that is, it gradually flows to the filter screens 15 on the circular frame 14 for filtration. Through the filtration of the filter screens 15, the impurities remain on the surface of the filter screens 15, while the cleaning liquid flows through the filter screens 15 into the storage box 6 at the bottom for storage.

[0027] The storage tank 6 is equipped with a feeding port 16, which facilitates the addition of cleaning fluid to the storage tank 6. When the circular buckle plate 13 and the circular frame 14 are installed in the storage tank 6, the horizontal position of the filter screen 15 is lower than the horizontal position of the connecting channel 5. This lower position of the filter screen 15 creates a height difference between the two, allowing space for impurities remaining on the surface of the filter screen 15 to accumulate. If the filter screen 15 and the connecting channel 5 are at the same horizontal position, there is no height difference between them, causing the cleaning fluid to be filtered at the port of the connecting channel 5. The accumulated impurities formed by the filtration may clog the port of the connecting channel 5, resulting in slower drainage. The circular buckle plate 13 can be threaded to the storage tank 6, and a sealing gasket is used to enhance the sealing effect. The circular buckle plate 13 is easy to remove from the storage tank 6, facilitating the upward removal of the circular buckle plate 13. Remove the filter screen 15 for easy replacement. The cleaning solution filtered through the filter screen 15 is stored in the storage tank 6. It can then be pumped up again by the cooperation of the micro water pump 9 and the pipeline 10 to rinse the mechanical seal 2 again according to the above process, thus achieving the purpose of rinsing the mechanical seal 2 and preventing particulate matter from causing wear on the mechanical seal 2. At the same time, the cleaning solution can cool the mechanical seal 2, improve its service life, and the circulating flushing component can rinse the mechanical seal 2 in real time. In addition, the entire device is installed on the pump body 1 without the need for additional water pipes, etc., and is not limited by the site. It is also applicable when the submersible sewage pump is used in a different location. Some submersible sewage pumps that can rinse the mechanical seal 2 are limited by the site and require external water pipes and other components. They are more suitable for submersible sewage pumps that are always installed in a specific location. The installation of the circulating flushing component allows the submersible sewage pump to rinse the mechanical seal 2 when it is used in any location.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0029] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel submersible sewage pump mechanical seal flushing device, comprising a pump body (1) and a mechanical seal (2) disposed in the pump body (1), wherein the pump body (1) is provided with a connecting cavity (3), characterized in that: The connecting cavity (3) is provided with a circulating flushing assembly for removing impurities on the mechanical seal (2). The circulating flushing assembly includes a sealing cover (4) provided in the connecting cavity (3). A spray ring (401) is fixedly connected to the periphery of the sealing cover (4). The pump body (1) is provided with a connecting channel (5). A storage tank (6) for storing cleaning fluid is fixedly installed on the pump body (1).

2. The novel submersible sewage pump mechanical seal flushing device according to claim 1, characterized in that, The sealing cover (4) is provided with an inclined surface (7), and the mechanical seal (2) is located in the middle of the inner cavity of the sealing cover (4).

3. The novel submersible sewage pump mechanical seal flushing device according to claim 1, characterized in that, The pump body (1) has a circular groove (8) for discharging the cleaning fluid inside the sealing cover (4) to the outside. The circular groove (8) is connected to the connecting channel (5).

4. The novel submersible sewage pump mechanical seal flushing device according to claim 1, characterized in that, A micro water pump (9) is fixedly installed in the connecting cavity (3). The micro water pump (9) is connected to the spray ring (401) and the storage tank (6) by pipes (10). The micro water pump (9) and the pipes (10) work together to draw up the cleaning liquid in the storage tank (6) and apply pressure to deliver it to the spray ring (401).

5. A novel submersible sewage pump mechanical seal flushing device according to claim 1, characterized in that, The spray ring (401) has a spray cavity (11) and a plurality of spray holes (12) are provided on the spray cavity (11), and the spray holes (12) extend to the inner wall of the sealing cover (4).

6. A novel submersible sewage pump mechanical seal flushing device according to claim 1, characterized in that, A circular buckle plate (13) is fixedly installed in the storage box (6), and a circular frame (14) is fixedly connected to the bottom of the circular buckle plate (13). Several filter screens (15) are fixedly installed on the circular frame (14). The filter screens (15) are used to filter impurities so that the cleaning liquid can be recycled.

7. A novel submersible sewage pump mechanical seal flushing device according to claim 6, characterized in that, The storage box (6) is provided with a feeding port (16). When the circular buckle plate (13) and the circular frame (14) are installed in the storage box (6), the horizontal position of the filter screen (15) is lower than the horizontal position of the connecting channel (5).

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