Submersible pump

Abstract

The utility model provides a submersible pump, which relates to the technical field of pumps and comprises a pump body, an impeller and a driving source. A pump cavity is formed in the pump body, and a water inlet and a water outlet which are communicated with the pump cavity are formed in the pump body; the impeller is accommodated in the pump cavity; a water inlet of the pump body is provided with a cutting edge for cutting foreign matters; the driving source is provided with a driving shaft, and the driving shaft is in power connection with the impeller so as to be used for driving the impeller to rotate. According to the submersible pump, the cutting edge used for cutting the foreign matter is arranged at the water inlet of the pump body, rapid water flow is generated at the water inlet of the submersible pump, large-size foreign matter in water rapidly impacts the cutting edge at the water inlet, the large-size foreign matter in the water is cut off and smashed by the cutting edge, and therefore the situation that the water inlet is blocked is reduced; and a sealing device and related structural parts in the pump body are protected, and the normal service life of the pump is prolonged.

Description

Technical Field

[0001] The present application relates to the field of pump technology, and in particular to a submersible pump. Background Art

[0002] Submersible pumps are widely used in daily life as water supply and drainage tools. In recent years, portable, high-flow submersible pumps, particularly those with a small weight and large displacement, have played a vital role in flood control and drought relief efforts. During flood control and drought relief operations, the conditions on site are complex and harsh, and the water may contain a large amount of debris. Large debris can easily clog the water inlet of a submersible pump. Furthermore, large, hard debris entangled in the pump body can cause wear and tear on the pump's seals, leading to seal failure and potentially serious damage. Furthermore, large, hard debris can also affect the proper functioning of the impeller. Utility Model Content

[0003] The technical problem to be solved by this application is to propose a submersible pump in response to the above-mentioned deficiencies in the prior art.

[0004] A submersible pump comprises: a pump body, an impeller, and a driving source; a pump chamber is provided inside the pump body, and a water inlet and a water outlet connected to the pump chamber are opened; the impeller is accommodated in the pump chamber; a cutting blade for cutting foreign matter is provided at the water inlet of the pump body; the driving source has a driving shaft, and the driving shaft is dynamically connected to the impeller to drive the impeller to rotate.

[0005] Optionally, the cutting blade is an independent component and is detachably mounted on the pump body.

[0006] Optionally, the cutting edge is a part of the pump body and is a sharp structure on the pump body.

[0007] Optionally, the driving source is a motor having a housing; the pump body includes a pump housing and a connecting structure; the connecting structure is connected between the pump housing and the motor housing; the pump chamber is located within the pump housing; a sealing device is provided on the driving shaft within the connecting structure; and a plurality of water inlets are arranged on the connecting structure;

[0008] The pump housing is provided with an opening on a side facing the connecting structure; the driving shaft of the motor extends toward one side of the connecting structure and passes through the connecting structure and the opening into the pump chamber; and, in the pump chamber, the driving shaft and the impeller are assembled and connected together.

[0009] Optionally, the connection structure includes a plurality of connectors arranged circumferentially around the drive shaft of the motor, the connectors extending from one side of the pump housing to one side of the motor casing, and forming water inlets between adjacent connectors; and a cutting blade is arranged on the connector.

[0010] Optionally, for any connector, a cutting blade is arranged on each side thereof, and the cutting blades on both sides are respectively located on the water inlets on both sides of the connector; and the cutting blades are detachably assembled on the connector.

[0011] Optionally, the cutting blade is fastened to the connecting body by screws.

[0012] Optionally, the connecting structure includes a plurality of connectors arranged circumferentially around the drive shaft of the motor, the connectors extending from one side of the pump housing to one side of the motor casing, and forming a water inlet between adjacent connectors; a cutting blade is arranged at the water inlet close to the pump housing side and / or close to the casing side.

[0013] Optionally, the sealing device includes a mechanical sealing structure fixed to a sealing support and accommodated in the sealing support; an oil chamber is formed inside the sealing support and the oil chamber contains lubricating oil; the mechanical sealing structure is arranged in the oil chamber and is surrounded by the lubricating oil in the oil chamber.

[0014] Optionally, the pump body and the impeller are of a centrifugal pump structure or an axial flow pump structure.

[0015] In the present application, a cutting blade for cutting foreign matter is provided at the water inlet of the pump body. A rapid water flow is generated at the water inlet of the submersible pump, so that large-sized debris in the water quickly hits the cutting blade at the water inlet, so that the large-sized debris in the water is cut and crushed by the cutting blade, thereby reducing the blockage of the water inlet, protecting the sealing device and related structural parts in the pump body, and extending the normal service life of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the submersible pump in an embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of the structural decomposition of the submersible pump in the embodiment of the present application.

[0018] Figure 3 It is a partial structural diagram of the submersible pump in the embodiment of the present application.

[0019] Figure 4 This is another structural diagram of the submersible pump in the embodiment of the present application.

[0020] Reference numerals: pump body 10 , pump casing 11 , connecting structure 12 , connecting body 121 , pump chamber 13 , water inlet 14 , water outlet 15 , cutting blade 16 , impeller 20 , driving source 30 , casing 31 , driving shaft 32 , sealing device 40 . DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present application and in conjunction with the accompanying drawings, the technical scheme of the present application is further described, but the application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted.

[0022] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] It should be understood that submersible pumps are widely used. For example, during flood control and drought relief operations, the on-site conditions are complex and harsh, and the water may contain a large amount of debris. On the one hand, as the submersible pump is used, the water inlet of the submersible pump is easily accumulated with large-sized debris, which may become blocked by large-sized debris. On the other hand, large-sized hard debris entangled in the pump body can cause the sealing device of the submersible pump to become entangled and worn, resulting in oil leakage from the sealing device and failure of the pump seal, thereby causing abnormal damage to the submersible pump. In addition, large-sized hard debris can also affect the normal operation of the impeller. To this end, the present application provides a submersible pump to solve the problems caused by large-sized debris in the water.

[0024] The present application provides a submersible pump comprising a pump body, an impeller, and a drive source. The pump body has a pump chamber disposed therein, with a water inlet and a water outlet communicating with the pump chamber. The impeller is housed within the pump chamber. A cutting blade for cutting foreign matter is disposed at the water inlet of the pump body. The drive source comprises a drive shaft, which is dynamically connected to the impeller to drive the impeller to rotate. Specifically, the drive source may be an electric motor or a hydraulic motor. When the drive shaft drives the impeller to rotate, water is rapidly drawn into the water inlet and discharged from the water outlet after being pressurized by the impeller. During operation, the water flow at the water inlet drives large debris in the water to rapidly collide with the cutting blade at the water inlet, causing the large debris in the water to be cut and pulverized by the cutting blade. In one embodiment of the present application, the submersible pump is a centrifugal pump, and its pump body and impeller are of a centrifugal pump structure. In another embodiment of the present application, the submersible pump is an axial flow pump, and its pump body and impeller are of an axial flow pump structure.

[0025] refer to Figure 1-Figure 3In the exemplary submersible pump of the first embodiment of the present application, the submersible pump includes a pump body 10, an impeller 20, and a drive source 30; a pump chamber 13 is provided inside the pump body 10, which is provided with a water inlet 14 and a water outlet 15 connected to the pump chamber 13; the impeller 20 is accommodated in the pump chamber 13; a cutting blade 16 for cutting foreign matter is provided at the water inlet 14 of the pump body 10; the drive source 30 has a drive shaft, which is dynamically connected to the impeller 20 to drive the impeller 20 to rotate. It should be understood that the submersible pump provided in the present application can have various structural forms. Figure 1-Figure 3 The structure shown is that of a compact pump.

[0026] In one embodiment of the present application, the cutting blade 16 is a separate component and is detachably mounted on the pump body 10. In one specific technical solution, the cutting blade 16 is connected to the pump body 10 via screws or bolts. Here, the cutting blade is designed as an independent, replaceable component. On the one hand, as the submersible pump is used, the cutting blade wears, the sharpness of the blade edge decreases, and the ability to cut through water debris decreases, making it unable to cut and crush large debris in the water. Because the cutting blade is detachable, it can be replaced after wear. On the other hand, the separate cutting blade can be made of a different material from the pump body, for example, a higher-hardness alloy material, thereby increasing the service life of the cutting blade.

[0027] In one embodiment of the present application, the cutting edge is a part of the pump body, which is a sharp structure on the pump body. Here, the sharp structure is directly processed on the pump body to act as a cutting edge. Compared with an independent cutting edge, this structural design is simple and has lower cost.

[0028] refer to Figure 1-Figure 3 In one embodiment of the present application, the driving source 30 is a motor, and the motor has a casing 31; the pump body 10 includes a pump casing 11 and a connecting structure 12; the connecting structure 12 is connected between the pump casing 11 and the casing 31 of the motor; the pump chamber 13 is located in the pump casing 11; in the connecting structure 12, a sealing device 40 is provided on the driving shaft 32; a plurality of water inlets 14 are arranged on the connecting structure 12; the pump casing 11 is provided with an opening on the side facing the connecting structure 12; the driving shaft 32 of the motor extends toward the side of the connecting structure 12, and passes through the connecting structure 12 and the opening to enter the pump chamber 13; and, in the pump chamber 13, the driving shaft 32 is assembled and connected with the impeller 20.

[0029] exist Figure 1-Figure 3In the structure shown, the connecting structure 12 is connected between the pump housing 11 and the motor casing 31. The output shaft of the motor extends through the connecting structure 12 into the pump housing 11. In the pump chamber 13, the drive shaft 32 is assembled and connected with the impeller 20. When the submersible pump is working, as the drive shaft of the motor drives the impeller 20 to rotate, water flows into the connecting structure 12 through the water inlet 14, and the water in the connecting structure 12 enters the pump chamber 13 through the opening on the pump housing 11. In this structure, the water inlet 14 is arranged on the connecting structure 12, and therefore, the cutting blade is arranged on the connecting structure 12; in one embodiment of the present application, the cutting blade 16 is an independent component and is assembled on the connecting structure 12 in a detachable manner. In one embodiment of the present application, the cutting blade is part of the pump body and is a sharp structure on the connecting structure 12.

[0030] In one embodiment of the present application, the connection structure 12 includes a plurality of connectors 121 arranged circumferentially around the motor drive shaft 32. The connectors 121 extend from one side of the pump housing 11 toward the motor housing 31, and a water inlet 14 is formed between adjacent connectors 121. Cutting blades 16 are arranged on the connectors 121. Furthermore, each connector 121 has a cutting blade 16 disposed on both sides, and the cutting blades 16 on both sides are located on the water inlet 14 on both sides of the connector 121. Furthermore, the cutting blades 16 are detachably mounted on the connector 121.

[0031] refer to Figure 3 , a plurality of connectors 121 are arranged circumferentially around the drive shaft 32 of the motor, and the number of connectors 121 can be 2, 3, 4, 5, 6, 7, 8, 9, 10, ..., which is not limited here. A water inlet 14 is formed between each pair of adjacent connectors 121, and a cutting blade 16 is arranged on the connector 121. In one embodiment of the present application, the cutting blade 16 is an independent component and is assembled on the connector 121 in a detachable manner. In this technical solution, the cutting blade 16 is fastened to the connector 121 by screws. In one embodiment of the present application, the cutting blade is a part of the pump body, specifically a sharp structure on the connector 121.

[0032] refer to Figure 4 The connection structure 12 includes a plurality of connectors 121 arranged circumferentially around the drive shaft 32 of the motor. The connectors 121 extend from one side of the pump housing 11 to the side of the motor housing 31, and a water inlet 14 is formed between adjacent connectors 121. A cutting blade is arranged at the water inlet 14 near the pump housing and / or the housing. Figure 4 In the embodiment, an upper cutting edge 16a is arranged on the side of the water inlet 14 close to the pump housing, and a lower cutting edge 16b is arranged on the side of the water inlet 14 close to the housing. Figure 4In FIG. 1 , the upper cutting edge 16 a and the lower cutting edge 16 b are schematically indicated by dotted lines.

[0033] In one embodiment of the present application, the sealing device 40 includes a mechanical seal structure fixed to and accommodated in a sealing support; an oil chamber is formed inside the sealing support and contains lubricating oil; the mechanical seal structure is disposed in the oil chamber and is surrounded by the lubricating oil in the oil chamber. Furthermore, the mechanical seal is specifically a double-end mechanical seal, with a set of friction pairs provided at each end. Lubricating oil is injected into the sealing support to lubricate the mechanical seal and enhance the sealing effect of the mechanical seal. Specifically, the sealing support is provided with a smooth outer shape on the side close to the impeller to serve as part of the side wall of the water inlet channel. This arrangement fully utilizes the outer shape structure of the sealing support, combines the sealing support and the connecting structure 12 together to form the water inlet channel, and is more compact in structure.

[0034] It should be understood that the pump body can have a variety of structural forms and can be structurally divided according to needs, for example, Figure 1-Figure 3 In the structure shown, the pump body 10 comprises multiple parts, which can be divided into at least two parts: a pump housing 11 and a connecting structure 12. Each connecting part can be connected by bolts, which can be easily disassembled for maintenance and replaced after damage. Figure 1-Figure 3 In the submersible pump structure shown, the impeller is directly mounted on the drive shaft of the motor, which is relatively compact. In other submersible pump structures, a separate pump shaft is provided in the pump body, and the drive shaft and the pump shaft are connected.

[0035] In addition, it should be noted that the submersible pump involved in the present application can be various types of submersible pumps. In one embodiment of the present application, the submersible pump is a centrifugal pump, and its pump body and impeller are of a centrifugal pump structure. Specifically, a centrifugal pump works by rotating the impeller to cause water to undergo centrifugal motion. Before the centrifugal pump is started, the pump chamber is filled with water. After the motor is started, the impeller drives the water to rotate at high speed, causing the water to undergo centrifugal motion and be thrown toward the outer edge of the impeller for discharge. In another embodiment of the present application, the submersible pump is an axial flow pump, and its pump body and impeller are of an axial flow pump structure. In an axial flow pump, when the motor drives the impeller to rotate, because the impeller blades have a certain helix angle with the pump shaft axis, thrust is generated on the liquid, pushing the liquid out and discharging it along the discharge pipe. When the liquid is pushed out, a local vacuum is formed at the original location, and the external water is sucked into the impeller under the action of atmospheric pressure.

[0036] In an embodiment of the present application, a cutting blade for cutting foreign matter is provided at the water inlet of the pump body. A rapid water flow is generated at the water inlet of the submersible pump, so that large-sized debris in the water quickly hits the cutting blade at the water inlet, so that the large-sized debris in the water is cut and crushed by the cutting blade, thereby reducing the blockage of the water inlet, protecting the sealing device and related structural parts in the pump body, and extending the normal service life of the pump.

[0037] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "multiple" means at least two, such as two, three, etc., unless otherwise clearly defined. It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprises" and / or "includes" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present application. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A submersible pump, characterized in that: include: A pump body, an impeller, and a driving source; a pump cavity is provided inside the pump body, and a water inlet and a water outlet connected to the pump cavity are opened; the impeller is accommodated in the pump cavity; a cutting blade for cutting foreign matter is provided at the water inlet of the pump body; the driving source has a driving shaft, and the driving shaft is dynamically connected to the impeller to drive the impeller to rotate.

2. The submersible pump according to claim 1, characterized in that The cutting blade is an independent component and is detachably mounted on the pump body.

3. The submersible pump according to claim 1, characterized in that The cutting edge is a part of the pump body and is a sharp structure on the pump body.

4. The submersible pump according to claim 1, characterized in that The driving source is a motor having a housing; the pump body includes a pump housing and a connecting structure; the connecting structure is connected between the pump housing and the motor housing; the pump chamber is located within the pump housing; a sealing device is provided on the driving shaft within the connecting structure; and a plurality of water inlets are arranged on the connecting structure; The pump housing is provided with an opening on a side facing the connecting structure; the driving shaft of the motor extends toward one side of the connecting structure and passes through the connecting structure and the opening into the pump chamber; and, in the pump chamber, the driving shaft and the impeller are assembled and connected together.

5. The submersible pump according to claim 4, characterized in that The connection structure includes a plurality of connectors arranged circumferentially around the drive shaft of the motor, the connectors extending from one side of the pump housing to one side of the motor casing, and forming water inlets between adjacent connectors; A cutting edge is arranged on the connecting body.

6. The submersible pump according to claim 5, characterized in that For any connector, a cutting blade is arranged on each of its two sides, and the cutting blades on both sides are respectively located on the water inlets on both sides of the connector; and the cutting blades are assembled on the connector in a detachable manner.

7. The submersible pump according to claim 6, characterized in that The cutting blade is fastened to the connecting body by screws.

8. The submersible pump according to claim 4, characterized in that The connection structure includes a plurality of connectors arranged circumferentially around the drive shaft of the motor, the connectors extending from one side of the pump housing to one side of the motor casing, and forming water inlets between adjacent connectors; A cutting blade is arranged on the side of the water inlet close to the pump housing and / or close to the machine casing.

9. The submersible pump according to claim 4, characterized in that The sealing device includes a mechanical sealing structure fixed to a sealing support and accommodated in the sealing support; an oil cavity is formed inside the sealing support and contains lubricating oil; the mechanical sealing structure is arranged in the oil cavity and surrounded by the lubricating oil in the oil cavity.

10. The submersible pump according to claim 1, characterized in that The pump body and the impeller are of a centrifugal pump structure or an axial flow pump structure.

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