Bottom suction submersible pump with inverted motor

Abstract

The utility model relates to the technical field of water pump equipment, in particular to a bottom suction submersible pump with an inverted motor. The motor, the water outlet section, the pump body and the water inlet section are sequentially and fixedly connected from top to bottom, the motor is inversely mounted at the top end of the submersible pump, an output shaft extends downwards to drive an impeller, the motor, the water outlet section and the pump body are sleeved with a cold flow cover, the bottom of the cold flow cover is fixed above the water inlet section to form an annular flow channel, and spiral flow deflectors are arranged on the inner wall of the cold flow cover. And a water outlet is formed in the top end of the cold flow cover. Through the inverted design of the motor, the water inlet joint is close to the bottom of a water source, the cold flow cover forces water flow to flow along the motor shell, efficient heat dissipation is achieved, and operation noise is reduced. Compared with a traditional submersible pump, the submersible pump improves the water absorption efficiency in the shallow water environment, has the heat dissipation and noise reduction functions, and is suitable for low-water-level water pumping scenes in industry, agriculture and daily life.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump equipment technical field, concretely relates to a motor upside-down type bottom suction submersible pump. BACKGROUND

[0002] In the water pump equipment technical field, the submersible pump is widely used in industry, agriculture and daily life in various occasions as an important fluid conveying equipment. The traditional submersible pump design is mostly motor upright installation, that is, the motor is located above the pump body, the output shaft drives the impeller to rotate downward, thereby realizing the function of water suction and drainage. This design has shown good performance in many application scenarios due to its simple structure, stable operation and other advantages.

[0003] However, the above-mentioned traditional design scheme has certain limitations, especially when dealing with shallow water areas. Due to the relatively high position of the water inlet, the submersible pump cannot effectively extract water from the bottom of the water source, causing the so-called "suction empty" phenomenon, which greatly affects the water pumping efficiency. Therefore, the motor upside-down design scheme is adopted, so that the water inlet section can be maximally close to the bottom of the water source, effectively solving the problem of water suction efficiency in shallow water environment.

[0004] Although the motor upside-down installation can significantly improve the adaptability of the submersible pump in shallow water environment, it also brings new challenges: after the motor is upside-down, the heat dissipation path is limited, which easily causes local overheating and affects the working efficiency and service life of the motor. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a motor upside-down type bottom suction submersible pump to solve the problems of low water suction efficiency of the traditional submersible pump in shallow water environment and local overheating caused by limited heat dissipation path after the motor upside-down installation.

[0006] To achieve the above-mentioned purpose, a motor upside-down type bottom suction submersible pump is provided, which comprises a motor and a pump body. The water flow output direction of the pump body is upward. The pump body is fixedly connected with a water inlet section below. The pump body is fixedly connected with a water outlet section above. The water outlet section is fixedly connected with the motor above. Wherein:

[0007] The motor is installed upside-down at the top end of the submersible pump. The output shaft extends downward into the pump body and is fixedly connected with the impeller in the pump body.

[0008] The motor, the water outlet section and the pump body are provided with a cold flow cover outside. The cold flow cover is fixedly connected above the water inlet section.

[0009] In the above-mentioned technical scheme, the motor is installed upside-down at the top end of the submersible pump. The output shaft extends downward to drive the impeller of the pump body, so that the water inlet section is maximally close to the bottom of the water source, which has good adaptability to shallow water areas.

[0010] The cold flow cover covers the motor, the water outlet section and the pump body, is fixed on the top of the water inlet section, forms an annular flow channel, forces the water flow to flow close to the motor shell, utilizes the forced convection of the water flow to dissipate heat, avoids local overheating of the motor caused by inverted installation, and covers the pump body to reduce noise of the pump body during work.

[0011] On this basis, the spiral guide vanes are fixedly connected to the inner wall of the cold flow cover, and the spiral guide vanes wrap the motor and the water outlet section from the top of the motor to the bottom end of the water outlet section.

[0012] Further, the spiral guide vanes are equidistant spiral structures and are uniformly distributed along the circumferential direction of the inner wall of the cold flow cover, and the spiral direction of the spiral guide vanes is consistent with the rotation direction of the impeller in the pump body.

[0013] Still further, the blade thickness of the spiral guide vanes gradually decreases from the root to the tip, and the tip is a circular arc transition.

[0014] In this technical solution, the spiral guide vanes adopt an equidistant spiral structure and are uniformly distributed along the circumferential direction of the inner wall of the cold flow cover, so that the water flow uniformly covers the surface of the motor shell, the rotation direction of the spiral guide vanes is consistent with the rotation direction of the impeller in the pump body, a forward flow guiding effect is formed, water flow resistance is reduced, the blade thickness of the spiral guide vanes gradually decreases from the root to the tip, and the tip adopts a circular arc transition design, so that the flow separation risk is reduced through the smooth streamline profile, and the turbulence and cavitation phenomena are inhibited.

[0015] As a further improvement of the technical solution, a filter screen is fixedly connected to the inside of the cold flow cover below and is located between the water outlet section and the pump body, because the cold flow cover covers the motor, the water outlet section and the pump body, the pump body is below the water outlet section, the water flows downward after flowing out of the water outlet section, needs to overcome the gravity work, and the pump body needs to compensate the gravity potential energy additionally, and the filter screen can be used as a local resistance element to hinder and guide the water flow.

[0016] As a further improvement of the technical solution, a water outlet is formed at the top end of the cold flow cover.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. In the motor inverted bottom suction submersible pump, the motor is invertedly installed at the top end of the submersible pump, the output shaft extends downward to drive the impeller, the water inlet section is maximally close to the bottom of the water source, the water suction efficiency in the shallow water environment is improved by lowering the water inlet height, the "suction emptying" problem caused by the high water inlet of the traditional submersible pump is solved, and the application range of the equipment in the low water level working condition is expanded.

[0019] 2. In the motor inverted bottom suction submersible pump, the cold flow cover covers the motor, the water outlet section and the pump body, the bottom is fixed above the water inlet section to form an annular flow channel, the forced water flow flows closely to the motor shell, and local overheating of the motor due to inverted installation is avoided through forced convection cooling; at the same time, the cold flow cover effectively reduces the working noise of the pump body and improves the use environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the utility model;

[0021] Figure 2 It is a water flow direction schematic view inside the utility model.

[0022] The meanings of various reference numerals in the drawing are as follows:

[0023] 1. Motor; 2. Water outlet section; 3. Pump body; 4. Water inlet section; 5. Cold flow cover; 6. Spiral flow guide vane; 7. Filter screen; 8. Water outlet. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] In the description of the utility model, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0026] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] Please refer to Figure 1The embodiment aims to provide an electric motor inverted bottom suction submersible pump, which comprises a motor 1, a water outlet section 2, a pump body 3 and a water inlet section 4 fixed and connected in sequence from top to bottom. The motor 1 is installed in an inverted mode and located at the top end of the submersible pump. The output shaft of the motor 1 extends downward and penetrates into the inside of the pump body 3 to directly drive the impeller to rotate, so that the water inlet section 4 can be maximally close to the bottom of the water source, especially suitable for shallow water environment, effectively avoiding the "suction empty" problem caused by the high position of the water inlet of the traditional submersible pump, and improving the water suction efficiency.

[0028] The motor 1, the water outlet section 2 and the pump body 3 are externally sleeved with a cold flow cover 5, the bottom of the cold flow cover 5 is fixedly connected with the water inlet section 4, and the top extends above the motor 1. The cold flow cover 5 and the internal components form an annular flow channel, and the water flow is forced to flow along the surface of the motor 1 shell. After entering the water inlet section 4, the water flow first passes through the filter screen 7 below the inside of the cold flow cover 5. The filter screen 7 is fixed between the water outlet section 2 and the pump body 3. Since the water outlet section 2 is above the pump body 3, the water flow may first flow to the lower inside of the cold flow cover 5 when it comes out. The filter screen 7 can moderately slow down the speed of the water flow downward, reducing the influence of turbulent flow on the stability of the system.

[0029] The inner wall of the cold flow cover 5 is uniformly distributed with spiral guide vanes 6, which are equidistant spirals with the same direction as the rotation direction of the impeller in the pump body 3. The spiral guide vanes 6 extend downward from the top of the motor 1 to the bottom end of the water outlet section 2, wrapping the motor 1 and the water outlet section 2. The blade thickness of the guide vanes 6 gradually decreases from the root to the tip, and the tip adopts a circular arc transition design to form a smooth streamline profile. This structure can guide the water flow to uniformly cover the surface of the motor 1 shell along the spiral path, achieve efficient heat dissipation through forced convection, and avoid the problem of local overheating caused by the inverted installation of the motor 1. In addition, the spiral guide vanes 6 can reduce water flow resistance, suppress turbulent flow and cavitation phenomenon, and further improve the operating efficiency.

[0030] The top end of the cold flow cover 5 is provided with a water outlet 8. The water flow pressurized by the pump body 3 enters the annular flow channel through the water outlet section 2 and is finally discharged from the water outlet 8. The cold flow cover 5 not only optimizes the heat dissipation path, but also reduces the noise of the pump body 3 during operation and improves the use environment.

[0031] Working principle: as Figure 2As shown, water flow enters the submersible pump from the water inlet section 4 at the bottom of the water source, the motor 1 is installed upside down at the top end, and its output shaft extends downward to drive the impeller in the pump body 3 to rotate, so that the water inlet section 4 is close to the bottom of the water source, and after the water flow enters the pump body, it comes out from the water outlet section 2 and enters the cold flow cover 5, and the filter screen 7 hinders the water flow to a certain extent, the mesh structure generates a local pressure drop, forcing the water flow to change the momentum direction, and under the action of centrifugal force, the water flow forms a spiral flow along the blade profile of the spiral guide vane 6. The water flow enters the annular flow passage formed in the cold flow cover 5, and the spiral guide vane 6 is fixed on the inner wall of the cold flow cover 5, and the spiral direction is consistent with the rotation direction of the impeller in the pump body 3, which guides the water flow to spiral upward along the surface of the motor 1 housing. The equidistant distribution and streamline design of the spiral guide vane 6 make the water flow uniformly cover the surface of the motor housing, and the heat is taken away through forced convection, and finally discharged from the water outlet 8 at the top end of the cold flow cover 5. The annular flow passage of the cold flow cover 5 wraps the motor 1, the water outlet section 2 and the pump body 3, forms a directional flow path, and at the same time restricts the water flow direction to assist heat dissipation.

[0032] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An electric motor inverted bottom suction submersible pump, comprising a pump body (3) with the water flow output direction upward, a water inlet section (4) fixedly connected below the pump body (3), and a water outlet section (2) fixedly connected above the pump body (3), characterized in that: The motor (1) is fixedly connected above the water outlet section (2), wherein: The motor (1) is installed upside down on the top end of the submersible pump, the output shaft extends downward into the pump body (3), and is fixedly connected with the impeller in the pump body (3); The motor (1), the water outlet section (2) and the pump body (3) are sleeved with a cold flow cover (5), and the bottom of the cold flow cover (5) is fixedly connected above the water inlet section (4).

2. The motor-inverted, foot-suction submersible pump of claim 1, wherein: The inner wall of the cold flow cover (5) is fixedly connected with a spiral guide vane (6), which wraps the motor (1) and the water outlet section (2) from the top of the motor (1) to the bottom of the water outlet section (2).

3. The motor-inverted, foot-suction submersible pump of claim 2, wherein: The spiral guide vane (6) is an equidistant spiral structure, which is uniformly distributed along the inner wall of the cold flow cover (5), and the spiral direction is consistent with the rotation direction of the impeller in the pump body (3).

4. The motor-inverted, foot-suction submersible pump of claim 3, wherein: The blade thickness of the spiral guide vane (6) gradually decreases from the root to the tip, and the tip is a circular arc transition.

5. The motor-inverted, foot-mounted, submersible pump of claim 1, wherein: The inside of the cold flow cover (5) is fixedly connected with a filter screen (7) below, which is located between the water outlet section (2) and the pump body (3).

6. The motor-inverted, foot-mounted, submersible pump of claim 1, wherein: The top end of the cold flow cover (5) is provided with a water outlet (8).

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