Centrifugal submersible pump

Abstract

The utility model provides a centrifugal submersible pump, and belongs to the technical field of submersible pumps. The problem that in the prior art, impeller efficiency is not high is solved. The submersible pump comprises a pump body, a submersible motor and a pump base, a mechanical seal is fixedly installed at the bottom of the submersible motor, a sealing ring body is formed at the upper end of the pump body, a sealing layer is formed at the bottom of the sealing ring body, and a through hole is formed in the center of the sealing layer. A first connecting cambered surface is formed in the upper end face of the impeller base, the impeller is installed in the impeller shell, a second connecting cambered surface is formed on the outer side face of the bottom of the impeller shell, the first connecting cambered surface is attached to the second connecting cambered surface, the impeller shell is fixedly installed at the upper end of the impeller base through the first connecting cambered surface, and a fixing ring base is formed at the bottom end of the impeller base. A filtering device is fixed in the pump base, and the top end of the filtering device extends out, is installed at the upper end of the pump base and is fixedly connected with the fixing ring base. The impeller driving device has the advantages of high impeller driving efficiency, stable structure and no damage to the impeller base.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible pumps and relates to a centrifugal submersible pump. Background Art

[0002] Submersible pumps are important equipment for deep well water extraction, and are primarily used for extracting groundwater, domestic water, farmland irrigation, industrial cooling, and mine rescue operations. Submersible pumps can bring groundwater to the surface and are suitable for a variety of water extraction applications.

[0003] A Chinese patent with patent publication number CN206329508U discloses a submersible pump, comprising a water pump body made of plastic, the water pump body comprising an impeller seat, an impeller mounted in the impeller seat, a through hole for a drive shaft to pass through the center of the impeller, a hollow cylindrical protective sleeve being provided inside the through hole, the protective sleeve being made of brass, the impeller being made of plastic, and an anti-wear layer being provided at the contact between the inner wall of the impeller seat and the outer edge of the impeller.

[0004] In a submersible pump provided by this patent, the impeller is installed inside the impeller seat. The centrifugal force generated by the rotation of the impeller in this structural arrangement is relatively limited. Moreover, since the impeller is installed inside the impeller seat, the impeller and the inner wall of the impeller seat are easily damaged when impacted or bumped. Utility Model Content

[0005] The purpose of the utility model is to provide a centrifugal submersible pump in view of the above problems existing in the prior art.

[0006] The objectives of the utility model can be achieved through the following technical solutions: A centrifugal submersible pump, comprising a pump body, a submersible motor and a pump base, wherein a mechanical seal is fixedly installed at the bottom of the submersible motor, a sealing ring body is formed at the upper end of the pump body, a sealing layer is formed at the bottom of the sealing ring body, a through hole is opened in the center of the sealing layer, an impeller housing, an impeller and an impeller base are arranged inside the pump body, a first connecting arc surface is formed in the upper end surface of the impeller base, the impeller is installed inside the impeller housing, a second connecting arc surface is formed on the outer side surface of the bottom of the impeller housing, the first connecting arc surface and the second connecting arc surface are fitted together, the impeller housing is fixedly installed on the upper end of the impeller base through the first connecting arc surface, a fixed ring seat is formed at the bottom end of the impeller base, a filter device is fixed inside the pump base, the top end of the filter device extends out and is installed on the upper end of the pump base and is fixedly connected to the fixed ring seat.

[0007] In the above-mentioned centrifugal submersible pump, a water outlet is formed and opened in the pump body.

[0008] In the above-mentioned centrifugal submersible pump, the middle portion of the impeller base is a narrowed structure, a support platform is formed inside the middle portion of the impeller base, and the bottom end surface of the impeller housing is fitted and fixed to the support platform.

[0009] In the above-mentioned centrifugal submersible pump, the pump base is a stepped structure, the bottom port diameter of the pump base is larger than the upper port diameter, and a plurality of side water inlets are opened on the surface of the pump base.

[0010] In the above-mentioned centrifugal submersible pump, a motor shaft extends out of the submersible motor, and the motor shaft passes through the through hole and is fixedly connected to the impeller housing and the impeller.

[0011] Compared with the prior art, the centrifugal submersible pump provided by the utility model has the following beneficial effects: through the structural setting of the second connecting arc surface in the impeller casing and the first connecting arc surface on the impeller base, the first connecting arc surface and the second connecting arc surface are fit together and fixed, and the bottom end of the impeller casing is fixed to the support platform in the impeller base, so that the impeller casing is stably installed on the upper outside of the impeller base. The setting structure of this structure is stable and will not affect the efficiency of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the pump structure;

[0015] Figure 4 It is a schematic diagram of the impeller and impeller casing structure;

[0016] Figure 5 It is a schematic diagram of the impeller base structure.

[0017] In the figure: 1. Pump body; 11. Sealing ring body; 12. Sealing layer; 13. Through hole; 14. Water outlet; 2. Submersible motor; 21. Motor shaft; 3. Pump base; 31. Side water inlet; 4. Mechanical seal; 5. Impeller housing; 51. Second connecting arc surface; 6. Impeller; 7. Impeller base; 71. First connecting arc surface; 72. Fixed ring seat; 73. Narrowing structure; 74. Support platform; 8. Filter device. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figures 1 to 5As shown, this embodiment includes a pump body 1, a submersible motor 2 and a pump base 3, the submersible motor 2, the pump body 1 and the pump base 3 are fixedly connected in sequence, a water outlet 14 is formed and opened in the pump body 1, an impeller housing 5, an impeller 6 and an impeller base 7 are arranged inside the pump body 1, the impeller 6 is installed inside the impeller housing 5, the impeller base 7 has a through structure and a first convex connecting arc surface 71 is formed on the inner side of the upper end surface, and a second concave connecting arc surface 51 is formed on the outer side of the bottom of the impeller housing 5. When the impeller housing 5 and the impeller base 7 are assembled and installed, the first connecting arc surface 71 and the second connecting arc surface 51 are completely fitted together, the impeller casing 5 is fixedly mounted on the outer upper end of the impeller base 7 through the first connecting arc surface 71, a filter device is fixed inside the pump base 3, the top end of the filter device extends out and is mounted on the upper end of the pump base 3, a fixed ring seat 72 is integrally formed at the bottom end of the impeller base 7, the fixed ring seat 72 is fixedly connected to the top end of the filter device, the pump base 3 is an internal hollow terraced structure, the filter device is located inside the pump base 3, the bottom port diameter of the pump base 3 is larger than the upper port diameter, and a number of side water inlets 31 are opened on the surface of the pump base 3.

[0020] like Figures 1 to 3 As shown, a mechanical seal 4 is fixedly installed at the bottom of the submersible motor 2, and a sealing ring body 11 is integrally formed at the upper end of the pump body 1. A sealing layer 12 is formed at the bottom of the sealing ring body 11, and a through hole 13 is opened in the center of the sealing layer 12. When the submersible motor 2 and the pump body 1 are connected, the sealing ring body 11 is sleeved on the outside of the mechanical seal 4 and the sealing layer 12 is sealed against the bottom end surface of the mechanical seal 4. A motor shaft 21 extends from the submersible motor 2, and the motor shaft 21 passes through the through hole 13 and is connected to the impeller 6 and the impeller housing 5.

[0021] To elaborate further, Figures 2 to 5 As shown, the middle part of the impeller base 7 is a narrowing structure 73, and a support platform 74 is formed on the inner side of the middle part of the impeller base 7. The bottom end surface of the impeller housing 5 is fitted and fixed to the support platform 74. The support platform 74 effectively improves the connection stability between the impeller housing 5 and the impeller base 7.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the present invention. 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 invention or exceeding the scope defined by the appended claims.

[0023] Although various terms are used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A centrifugal submersible pump comprising a pump body (1), a submersible motor (2) and a pump base (3), wherein a mechanical seal (4) is fixedly mounted on the bottom of the submersible motor (2), and characterized in that: The pump body (1) is provided with a sealing ring body (11) at the upper end thereof, a sealing layer (12) is formed at the bottom of the sealing ring body (11), and a through hole (13) is provided at the center of the sealing layer (12). An impeller housing (5), an impeller (6) and an impeller base (7) are provided inside the pump body (1), a first connecting arc surface (71) is formed in the upper end surface of the impeller base (7), the impeller (6) is installed inside the impeller housing (5), a second connecting arc surface (51) is formed on the outer side surface of the bottom of the impeller housing (5), the first connecting arc surface (71) and the second connecting arc surface (51) are fitted together, the impeller housing (5) is fixedly installed on the upper end of the impeller base (7) through the first connecting arc surface (71), a fixed ring seat (72) is formed at the bottom end of the impeller base (7), a filter device is fixed inside the pump base (3), the top end of the filter device extends out and is installed on the upper end of the pump base (3) and is fixedly connected to the fixed ring seat (72).

2. A centrifugal submersible pump according to claim 1, characterized in that: A water outlet (14) is formed and opened in the pump body (1).

3. A centrifugal submersible pump according to claim 1, characterized in that: The middle portion of the impeller base (7) is a narrowed structure (73), a support platform (74) is formed on the inner side of the middle portion of the impeller base (7), and the bottom end surface of the impeller housing (5) is fitted and fixed to the support platform (74).

4. A centrifugal submersible pump according to claim 1, characterized in that: The pump base (3) is a stepped structure, the bottom port diameter of the pump base (3) is larger than the top port diameter, and a plurality of side water inlets (31) are provided on the surface of the pump base (3).

5. A centrifugal submersible pump according to claim 1, characterized in that: A motor shaft (21) extends from the submersible motor (2), and the motor shaft (21) passes through the through hole (13) and is fixedly connected to the impeller housing (5) and the impeller (6).

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