Submersible pump
By installing an annular spoiler retaining ring on the impeller of the submersible pump, the problem of air traps in the impeller is solved, ensuring the normal operation and service life of the submersible pump.
Patent Information
- Application Number
- CN202421979312.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The depressions formed by existing submersible pumps at the connection between the impeller and the motor are likely to cause gas trapping, resulting in a decrease in drainage flow and head, and the motor may idle, shortening its service life.
A submersible pump is designed, with its impeller mounted on the motor shaft and an annular spoiler retaining ring is provided at the bottom of the inner shell. The outer diameter of the spoiler retaining ring is not less than the outer diameter of the depression area of the upper end surface of the impeller to prevent the gas from squeezing above the impeller.
It effectively avoids the gas trap at the impeller, ensures the normal drainage function of the submersible pump, avoids the idling of the motor, and extends the service life of the submersible pump.
Smart Images
Figure CN222894404U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of submersible pumps. Background Art
[0002] Submersible pump is a widely used water treatment tool. Unlike ordinary water pumps, it works underwater and usually includes a pump body, a motor, and an impeller. The pump body is provided with a water inlet and a water outlet. The motor starts to drive the impeller to rotate, driving water to enter from the water inlet and then be discharged from the water outlet. The water flow channel is a channel formed through the hollow part inside the pump body.
[0003] Due to the demand for drainage pressure and drainage volume, the existing submersible pumps need to design the structure of the impeller, which will cause the connection side of the impeller and the motor to have a recessed area with a roughly "V"-shaped cross-section. This results in a hollow area being formed between the recessed area and the inner shell of the pump body where the motor is installed. In the process of the motor driving the impeller to rotate, air is trapped in the hollow area of the impeller, resulting in a decrease in drainage flow and head, and failure to drain water in time, which can easily cause the motor to idle, resulting in a decrease in the service life of the submersible pump.
[0004] Moreover, after the water outlet of the pump body of the existing submersible pump is connected to the water outlet pipe, if the air in the hollow channel inside the pump body is not discharged in time before the motor is turned on, it is difficult to discharge smoothly from the water outlet afterwards, which is also easy to cause air entrapment. Utility Model Content
[0005] The utility model aims to provide a submersible pump, which has the advantages of preventing air entrapment and prolonging service life.
[0006] In order to achieve the above purpose, the solution of the utility model is:
[0007] A submersible pump comprises a pump body, a motor and an impeller; the pump body comprises an inner shell and an outer shell which are arranged inside and outside, a water passage cavity is formed between the inner shell and the outer shell, the bottom of the outer shell is provided with a water inlet which connects the water passage cavity and the outside, and the upper part of the outer shell is provided with a water outlet which connects the water passage cavity and the outside; the motor is installed inside the inner shell and has a motor shaft extending out of the bottom of the inner shell, the impeller is installed at the motor shaft, the impeller is located in the water passage cavity and is opposite to the water inlet which is located at the bottom of the outer shell; a circle of annular spoiler retaining ring is provided at the bottom of the inner shell on the outer periphery of the motor shaft, the lower end face of the spoiler retaining ring is gap-fitted with the upper end face of the impeller, and the outer diameter of the spoiler retaining ring is not less than the outer diameter of the recessed area of the upper end face of the impeller.
[0008] Furthermore, the impeller is a double-layer impeller, the bottom of the impeller is an impeller water inlet hole, the impeller water inlet hole is opposite to the water inlet of the pump body, and the circumference of the impeller is provided with a plurality of impeller water outlet holes, which are connected to the water cavity.
[0009] Furthermore, it also includes a shell; the shell includes an upper shell and a lower mesh cover that are detachably connected up and down, and the upper shell and the lower mesh cover are connected up and down to surround the pump body; the lower mesh cover is provided with a water mesh hole connecting the water inlet and the outside world, and the upper shell has a drain port connecting the water outlet and the outside world.
[0010] Furthermore, the upper shell body has an upper cavity for accommodating the upper part of the pump body, and the drain outlet is recessed on the right side of the inner wall of the upper cavity; the outer wall on the right side of the upper shell body is provided with a drain part for externally connecting a drain pipe, and the drainage channel of the drain part is connected to the drain outlet; the outer wall of the upper part of the pump body is provided with a protruding water outlet, and the water outlet is provided on the outer end surface of the water outlet; the upper part of the pump body is installed and fixed in the upper cavity, and the outer end of the water outlet is embedded in the drain outlet of the inner wall of the upper cavity.
[0011] Furthermore, a step surface is provided in the drain outlet, and the outer end surface of the water outlet portion abuts against the step surface.
[0012] Furthermore, a plurality of limiting ribs are protruded on the inner wall of the upper cavity relative to the left side of the drain outlet; after the water outlet on the right side of the pump body is embedded in the drain outlet, the outer wall on the left side of the pump body is limited and supported by the limiting ribs.
[0013] Furthermore, a plurality of positioning ribs are provided at intervals on the front and rear sides of the inner wall of the upper cavity; each positioning rib is used to position and fix the position of the pump body after the water outlet of the pump body is embedded in the drain outlet.
[0014] Furthermore, the drainage part can be detachably equipped with a drainage joint, and a one-way valve is arranged in the drainage joint.
[0015] Furthermore, it also includes a capacitive sensing device, which is electrically connected to the motor.
[0016] Furthermore, an induction shell is provided on one side of the outer shell of the pump body, and a waterproof and sealed installation chamber is provided in the induction shell, and the capacitive sensing device is arranged in the installation chamber; the capacitive sensing device has at least two induction poles spaced up and down and closely attached to the inner wall of the induction shell, and the height of the induction pole is higher than the height of the water inlet of the pump body.
[0017] After adopting the above technical solution, when the impeller is working, due to the blocking and interference of the spoiler ring, the gas will not be squeezed above the impeller, which can avoid the problem of trapped air, ensure that the submersible pump can drain water normally, avoid dry operation, and ensure the service life of the submersible pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A three-dimensional diagram of an embodiment of the utility model;
[0019] Figure 2 An exploded view of an embodiment of the utility model;
[0020] Figure 3 A top view of an embodiment of the utility model;
[0021] Figure 4 for Figure 3 Sectional view at AA;
[0022] Figure 5 for Figure 3 Cross-sectional view at BB;
[0023] Figure 6 It is a partial structural schematic diagram of a pump body according to an embodiment of the utility model;
[0024] Figure 7 It is a schematic structural diagram of an upper shell of an embodiment of the utility model.
[0025] Explanation of reference numerals: pump body 1, inner shell 11, outer shell 12, water chamber 13, water inlet 14, water outlet 15, spoiler retaining ring 16, water outlet portion 17, induction shell 18, installation chamber 19, motor 2, motor shaft 21, impeller 3, recessed area 31, impeller water inlet hole 32, impeller water outlet hole 33, shell 4, upper shell 41, drain port 411, upper chamber 412, drain portion 413, drain channel 414, step surface 415, limiting rib 416, positioning rib 417, drain joint 418, one-way valve 419, lower mesh cover 42, water mesh hole 421, capacitive sensing device 5, induction electrode 51. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0027] like Figures 1 to 7 As shown, a submersible pump of the utility model comprises a pump body 1, a motor 2 and an impeller 3; the pump body 1 comprises an inner shell 11 and an outer shell 12 which are arranged inside and outside, a water passage chamber 13 is formed between the inner shell 11 and the outer shell 12, the bottom of the outer shell 12 has a water inlet 14 connected to the water chamber 13 and the outside, and the upper part of the outer shell 12 has a water outlet 15 connected to the water chamber 13 and the outside; the motor 2 is installed inside the inner shell 11, and has a motor shaft 21 extending out of the bottom of the inner shell 11, the impeller 3 is installed at the motor shaft 21, and the impeller 3 is located in the water passage chamber 13 and is opposite to the water inlet 14 located at the bottom of the outer shell 12.
[0028] In order to avoid the occurrence of air entrapment at three locations of the impeller, the utility model makes the following improved designs:
[0029] like Figure 2 and Figure 4 In this embodiment, a ring-shaped spoiler ring 16 is provided at the bottom of the inner shell 11 on the outer periphery of the motor shaft 21. The lower end surface of the spoiler ring 16 is gap-fitted with the upper end surface of the impeller 3, and the outer diameter of the spoiler ring 16 is not less than the outer diameter of the recessed area 31 on the upper end surface of the impeller 3.
[0030] Thereby, when the impeller 3 is working, due to the obstruction and interference of the spoiler retaining ring 16, the gas will not be squeezed above the impeller 3, which can avoid the problem of trapped air, ensure that the submersible pump can drain water normally, avoid dry operation, and ensure the service life of the submersible pump.
[0031] In this embodiment, the impeller 3 is a double-layer impeller 3, the bottom of the impeller 3 is an impeller water inlet 32, the impeller water inlet 32 is located opposite to the water inlet 14 of the pump body 1, and the circumference of the impeller 3 is provided with a plurality of impeller water outlets 33, the impeller water outlets 33 are connected to the water cavity 13. The double-layer impeller 3 adopts the structure of the prior art, and the double-layer impeller 3 is provided to increase the drainage flow and drainage pressure.
[0032] In order to ensure the safety of the submersible pump and prevent the submersible pump from being damaged, a shell 4 is further provided in this embodiment to protect the pump body 1.
[0033] like Figure 2 The shell 4 includes an upper shell 41 and a lower mesh cover 42 which are detachably connected to each other. In this embodiment, the upper shell 41 and the lower mesh cover 42 are fitted together by snap-fit.
[0034] The upper shell 41 and the lower mesh cover 42 are connected up and down to surround the pump body 1; the lower mesh cover 42 is provided with a water mesh hole 421 connecting the water inlet 14 and the outside, and the upper shell 41 has a drain port 411 connecting the water outlet 15 and the outside. The lower mesh cover 42 is provided to filter debris to prevent the water inlet 14 of the pump body 1 from contacting the debris. The upper shell 41 is provided mainly to surround and protect the upper main body of the pump body 1.
[0035] See also Figure 5 and Figure 6 The upper shell 41 has an upper cavity 412 for accommodating the upper part of the pump body 1, and the drain port 411 is recessed on the right side of the inner wall of the upper cavity 412; the outer wall on the right side of the upper shell 41 is provided with a drain portion 413 for externally connecting a drain pipe (not shown), and the drain channel 414 of the drain portion 413 is connected to the drain port 411; the outer wall of the upper part of the pump body 1 is provided with a protruding water outlet portion 17, and the outer end surface of the water outlet portion 17 is provided with the water outlet 15; the upper part of the pump body 1 is installed and fixed in the upper cavity 412, and the outer end of the water outlet portion 17 is embedded in the drain port 411 on the inner wall of the upper cavity 412.
[0036] Thus, the pump body 1 is fixed by interlocking the water outlet 17 and the drain port 411, and there is no need to perform ultrasonic welding on the two, which saves production steps and facilitates the design and development of product molds. At the same time, since the water outlet 15 connected to the water chamber 13 of the pump body 1 and the drain port 411 of the drain portion 413 connected to the drain pipe are embedded, that is, there will be a certain gap between the water outlet 15 and the drain port 411, and the gap can be used for the gas in the water chamber 13 to be discharged. Therefore, the structure of this embodiment adds an exhaust function, which can prevent air entrapment in the water chamber 13 of the pump body 1 and ensure the flow rate and lift.
[0037] like Figure 5 The drain port 411 is provided with a step surface 415, and the outer end surface of the water outlet 17 abuts against the step surface 415. In this embodiment, the water outlet 17 is embedded in the drain port 411 to a depth of about 2 mm, and can abut against the step surface 415 for position limiting and fixing.
[0038] Another example Figure 7 As shown, the inner wall of the upper cavity 412 of this embodiment is provided with a plurality of limiting ribs 416 protruding from the left side of the drain outlet 411; in this embodiment, four limiting ribs 416 spaced apart front and rear are provided, and after the water outlet 17 on the right side of the pump body 1 is embedded in the drain outlet 411, the outer wall on the left side of the pump body 1 is limited and supported by the limiting ribs 416 to play an anti-slip effect, thereby preventing the water outlet 17 of the pump body 1 from detaching from the drain outlet 411. The upper shell 41 can be a plastic product with a certain elasticity, so that the pump body 1 can be stuck between the limiting ribs 416 and the drain outlet 411.
[0039] Furthermore, a plurality of positioning ribs 417 may be provided at intervals on the front and rear sides of the inner wall of the upper cavity 412 ; each positioning rib 417 is used to position and fix the position of the pump body 1 after the water outlet 17 of the pump body 1 is embedded in the drain port 411 .
[0040] like Figure 5 As shown, the drainage portion 413 can also be detachably equipped with a drainage joint 418, in which a one-way valve 419 can be provided, and the drainage joint 418 is used to quickly connect the drainage pipe to ensure drainage pressure and prevent water from flowing back in the drainage pipe.
[0041] For example Figure 4 As shown, this embodiment also includes a capacitive sensing device 5, which is electrically connected to the motor 2 and is used to sense the water level to control whether the motor 2 is running or not, thereby realizing the automatic start and stop of the submersible pump.
[0042] For details, see Figure 2 and Figure 4The pump body 1 has an induction housing 18 on one side of its shell. The induction housing 18 has a waterproof and airtight installation chamber 19. The capacitive induction device 5 is installed in the installation chamber 19. The capacitive induction device 5 has at least two induction poles 51 spaced apart from each other and attached to the inner wall of the induction housing 18. Moreover, the height of the induction pole is higher than the height of the water inlet 14 of the pump body 1. The water level of the submersible pump can be known by the induction pole 51 to control the motor 2 to automatically turn off or on to prevent dry running. The induction principle is an existing design, and the specific principle will not be repeated here.
[0043] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.
[0044] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.
[0045] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. In addition, the present application provides examples of various specific processes and materials, but a person of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.
Claims
1. A submersible pump, comprising a pump body, a motor and an impeller; the pump body comprises an inner shell and an outer shell arranged inside and outside, a water passage cavity is formed between the inner shell and the outer shell, the bottom of the outer shell has a water inlet connected to the water passage cavity and the outside, and the upper part of the outer shell has a water outlet connected to the water passage cavity and the outside; the motor is installed inside the inner shell and has a motor shaft extending from the bottom of the inner shell, the impeller is installed at the motor shaft, the impeller is located in the water passage cavity and is opposite to the water inlet located at the bottom of the outer shell; the characteristics are: The bottom of the inner shell is provided with an annular spoiler ring on the outer periphery of the motor shaft, the lower end surface of the spoiler ring is gap-fitted with the upper end surface of the impeller, and the outer diameter of the spoiler ring is not less than the outer diameter of the concave area of the upper end surface of the impeller.
2. A submersible pump according to claim 1, characterized in that: The impeller is a double-layer impeller, the bottom of the impeller is an impeller water inlet hole, the impeller water inlet hole is opposite to the water inlet of the pump body, and the circumference of the impeller is provided with a plurality of impeller water outlet holes, which are connected to the water cavity.
3. A submersible pump according to claim 1, characterized in that: It also includes a shell; the shell includes an upper shell and a lower mesh cover that are detachably connected up and down, and the upper shell and the lower mesh cover are connected up and down to surround the pump body; the lower mesh cover is provided with a water mesh hole connecting the water inlet and the outside world, and the upper shell has a drain port connecting the water outlet and the outside world.
4. A submersible pump according to claim 3, characterized in that: The upper shell body has an upper cavity for accommodating the upper part of the pump body, and the drain port is recessed on the right side of the inner wall of the upper cavity; the outer wall on the right side of the upper shell body is provided with a drain part for externally connecting a drain pipe, and the drainage channel of the drain part is connected to the drain port; the outer wall of the upper part of the pump body is provided with a protruding water outlet, and the water outlet is provided on the outer end surface of the water outlet; the upper part of the pump body is installed and fixed in the upper cavity, and the outer end of the water outlet is embedded in the drain port on the inner wall of the upper cavity.
5. A submersible pump according to claim 4, characterized in that: A step surface is provided in the drain port, and the outer end surface of the water outlet portion abuts against the step surface.
6. A submersible pump according to claim 4, characterized in that: The inner wall of the upper cavity is provided with a plurality of limiting ribs on the left side relative to the drain outlet; after the water outlet on the right side of the pump body is inserted into the drain outlet, the outer wall on the left side of the pump body is limited and supported by the limiting ribs.
7. A submersible pump according to claim 4, characterized in that: A plurality of positioning ribs are provided at intervals on the front and rear sides of the inner wall of the upper cavity; each positioning rib is used to position and fix the position of the pump body after the water outlet of the pump body is embedded in the drain outlet.
8. A submersible pump according to claim 4, characterized in that: The drainage part can also be detachably equipped with a drainage joint, in which a one-way valve is arranged.
9. A submersible pump according to claim 3, characterized in that: Also included is a capacitive sensing device electrically connected to the motor.
10. A submersible pump according to claim 9, characterized in that: An induction shell is provided on one side of the outer shell of the pump body, and a waterproof and airtight installation chamber is provided in the induction shell, and the capacitive sensing device is arranged in the installation chamber; the capacitive sensing device has at least two induction poles which are spaced up and down and closely attached to the inner wall of the induction shell; the height of the induction pole is higher than the height of the water inlet of the pump body.