A base for a submersible pump

Abstract

This utility model relates to a base for a submersible pump, including a base body; the base body has a water inlet seat at its center to draw water into the pump cavity, and a water guide channel for water inlet is provided on the bottom surface of the base body, and the water guide channel communicates with the water inlet seat; the water guide channel is arranged along the outer diameter edge of the water inlet seat to the outer diameter edge of the base body, and several water guide channels are arranged radially along the radial direction of the base body; the upper center surface of the base body has a cavity seat for accommodating the impeller, and the cavity seat has an exhaust hole for discharging some of the gas in the pump cavity to the outside; this utility model, by providing a water guide channel and a water inlet seat on the bottom surface of the base body, allows water to be smoothly drawn into the pump cavity through the water guide channel at low water levels, and the suction is very smooth; and the exhaust hole on the cavity seat further enables the air in the pump cavity to be quickly discharged to the outside at low water levels, achieving continuous suction and greatly improving the suction efficiency at low water levels.

Description

Technical Field

[0001] This utility model belongs to the field of submersible pump technology, and in particular relates to a base for a submersible pump. Background Technology

[0002] Submersible pumps are a widely used water treatment tool in daily life. They can be seen in both agricultural production and industrial processing. Unlike ordinary water pumps, they work underwater. When in use, the entire unit is submerged in water to extract groundwater to the surface. They are indispensable tools for domestic water supply, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship ballast adjustment, and fountain landscapes. Before starting the pump, the suction pipe and the pump body must be filled with liquid. After the pump is started, the impeller rotates at high speed, and the liquid inside rotates with the blades. Under the action of centrifugal force, it flies away from the impeller and is ejected outward. The ejected liquid gradually slows down in the diffuser chamber of the pump casing, and the pressure gradually increases. Then it is discharged from the pump's exhaust valve. At the center of the blades, a vacuum low-pressure zone is formed where there is neither air nor liquid because the liquid is thrown to the surrounding area. Under the action of atmospheric pressure on the surface of the liquid pool, the liquid flows into the pump through the suction pipe. In this way, the liquid is continuously drawn up from the liquid pool and continuously flows out of the pump outlet. Due to the relatively large space of the pump chamber and the existing submersible pump base structure design, it is difficult to quickly remove the air in the pump chamber when low water level pumping is required. Therefore, it is difficult to establish a continuous pumping effect at low water levels, and the pumping efficiency is not high. Therefore, improvements are needed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a base for a submersible pump that has high pumping efficiency at low water levels.

[0004] The purpose of this utility model is achieved through the following technical solution: the base of this submersible pump includes a base body; the center of the base body is provided with a water inlet seat for drawing water into the pump body cavity; the bottom surface of the base body is provided with a water guide channel for water inlet, and the water guide channel communicates with the water inlet seat; the water guide channel is arranged along the outer diameter edge of the water inlet seat to the outer diameter edge of the base body, and several water guide channels are provided and arranged radially along the radial direction of the base body; the upper center surface of the base body is provided with a cavity seat for accommodating the impeller, and the cavity seat is provided with an exhaust hole for discharging part of the gas in the pump body cavity to the outside.

[0005] The beneficial effects of this utility model are as follows: Compared with the prior art, by providing a water guiding channel and a water inlet seat on the bottom surface of the base body, water can be smoothly drawn into the pump body cavity through the water guiding channel when the water level is low, and the suction is very smooth. Furthermore, an exhaust hole is provided on the seat body of the cavity, which further enables the air in the pump cavity to be quickly discharged to the outside when the water level is low, thereby achieving continuous suction and greatly improving the suction efficiency at low water levels.

[0006] Preferably, the width of the water guide channel on the outer diameter side of the water inlet seat is smaller than the width on the outer diameter side of the base body, and the channel wall of the water guide channel is arc-shaped. By setting the outer diameter width ratio, the water flow can gradually narrow after it initially enters. In addition, the negative pressure generated by the rotation of the impeller allows the water flow to be quickly drawn into the pump body cavity, resulting in a better suction effect. Furthermore, by setting the channel wall of the water guide channel to an arc shape, the water flow can be evenly drawn in from the bottom periphery of the pump body.

[0007] Preferably, the water inlet base includes a central cylinder and a base plate. The base plate is fixed to the axial end of the central cylinder, and the outer diameter of the base plate is larger than the outer diameter of the central cylinder. A water suction channel is formed between the outer circumferential wall of the central cylinder and the upper end face of the base plate and the center of the base body. With the above structure, the water guide channel and the water suction channel are interconnected. Water flows smoothly from the water guide channel through the impeller and into the pump body cavity through the water suction channel, resulting in higher suction efficiency in low water level pumping.

[0008] Preferably, the end of the channel wall on the side of the water guide channel near the water inlet seat is fixed to the outer peripheral wall of the central cylinder, the upper end face of the bottom plate, and the center of the base body; this makes the water guide channel on the water inlet seat divided, and the suction force of water extraction will be increased when the impeller is in effective working condition.

[0009] Preferably, the through hole in the base plate is connected to the through hole in the central cylinder, and a fan blade-shaped grid is provided on the inner wall of the through hole in the base plate; this enables water vapor separation in the impeller, and through the high-speed rotation of the impeller, the water is basically drawn into the pump body cavity from the water guide channel.

[0010] Preferably, the seat of the cavity protrudes upward along the top surface of the base body to form an annular groove, and the opening of the annular groove communicates with the bottom surface of the base body. The channel wall of the water guide extends in the height direction to the bottom and inside of the annular groove, and the channel wall of each water guide is separated within the annular groove. This ensures that the water flow entering the water guide will not mix within the annular groove, but rather that the water flow in each water guide is within its own channel, resulting in better water suction balance.

[0011] Preferably, a baffle unit is provided on the base body corresponding to the vent, and the baffle unit is disposed on one side of the channel wall of the water guide channel; by providing the baffle unit, the vent can reduce the generation of air bubbles in the water during the venting process.

[0012] Preferably, the baffle unit includes a baffle and a side plate. The side plate is disposed in the annular groove and forms an exhaust channel with the channel wall of the water guiding channel. The baffle is disposed between the end of the side plate and the channel wall of the water guiding channel, and the bottom of the baffle is flush with the channel wall of the water guiding channel. With the above structure, the exhaust channel is connected to the exhaust hole, which further ensures that the exhaust area will not expand during the exhaust process, and exhaust can only be released from the gap between the baffle and the bottom surface of the base body.

[0013] Preferably, the side of the cavity seat is provided with a water inlet that communicates with the pump body outlet; this allows the water inside the pump body cavity to be discharged to the outside through the pump body outlet. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the base structure of this utility model. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the base structure of this utility model. Figure 2 .

[0016] Figure 3 This is a schematic diagram of the main cross-sectional structure of the submersible pump of this utility model.

[0017] The labels in the attached diagram are as follows: 1. Base body; 2. Pump cavity; 3. Inlet seat; 4. Water guide channel; 5. Impeller; 6. Cavity seat; 7. Suction channel; 8. Baffle unit; 31. Central cylinder; 32. Base plate; 33. Grille; 41. Channel wall; 61. Seat; 62. Vent hole; 63. Annular groove; 64. Vent channel; 65. Water inlet; 81. Baffle; 82. Side plate. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figures 1 to 3As shown, this utility model includes a base body 1; the center of the base body 1 is provided with a water inlet seat 3 for drawing water into the pump body cavity 2, and the bottom surface of the base body 1 is provided with a water guide channel 4 for water inlet, and the water guide channel 4 communicates with the water inlet seat 3; the water guide channel 4 is arranged along the outer diameter edge of the water inlet seat 3 to the outer diameter edge of the base body 1, and several water guide channels 4 are provided and are arranged radially along the radial direction of the base body 1; the upper center surface of the base body 1 is provided with a cavity seat 6 for accommodating the impeller 5, and the seat body 61 of the cavity seat 6 is provided with an exhaust hole 62 for discharging part of the gas in the pump body cavity 2 to the outside; most of the gas is discharged from the exhaust valve provided on the pump housing of the submersible pump (the existing general principle). At low water levels, the air in the pump cavity can be quickly discharged into the water through the exhaust hole provided on the seat body of the cavity seat (at this time, the air pressure in the pump body cavity 2 is greater than the external water pressure), realizing continuous pumping and greatly improving the pumping efficiency at low water levels.

[0019] The width of the water channel 4 on the outer diameter side of the water inlet seat 3 is smaller than the width on the outer diameter side of the base body 1, and the channel wall 41 of the water channel 4 is arc-shaped.

[0020] The water inlet base 3 includes a central cylinder 31 and a base plate 32. The base plate 32 is fixed on the axial end of the central cylinder 31, and the outer diameter of the base plate 32 is larger than the outer diameter of the central cylinder 31. A water suction channel 7 is formed between the outer peripheral wall of the central cylinder 31 and the upper end face of the base plate 32 and the center of the base body 1.

[0021] The end of the channel wall 41 on the side of the water guide channel 4 near the water inlet seat 3 is fixed to the outer peripheral wall of the central cylinder 31, the upper end face of the bottom plate 32, and the center of the base body 1.

[0022] The through hole provided in the base plate 32 is connected to the through hole of the central cylinder 31, and a fan blade-shaped grid 33 is provided on the inner wall of the through hole of the base plate 32.

[0023] The seat 61 of the cavity seat 6 protrudes upward along the top surface of the base body 1 and forms an annular groove 63. The opening of the annular groove 63 communicates with the bottom surface of the base body 1. The channel wall 41 of the water guiding channel 4 extends in the height direction to the bottom and inside of the annular groove 63, and the channel wall 41 of each water guiding channel 4 is separated in the annular groove 63.

[0024] A baffle unit 8 is provided on the base body 1 corresponding to the vent 62, and the baffle unit 8 is located on one side of the channel wall of the water guide channel 4.

[0025] The baffle unit 8 includes a baffle 81 and a side plate 82. The side plate 82 is disposed in the annular groove 63 and forms an exhaust channel 64 between it and the channel wall 41 of the water guiding channel 4. The baffle 81 is disposed between the end of the side plate 82 and the channel wall 41 of the water guiding channel 4, and the baffle 81 is flush with the bottom of the channel wall 41 of the water guiding channel 4.

[0026] The side of the cavity seat 6 is provided with a water inlet 65 that communicates with the water outlet of the pump body.

[0027] The working principle of this utility model is as follows: First, the submersible pump is placed into the liquid in the pool to be pumped, the motor is turned on and the impeller 5 is driven; then, as the impeller 5 rotates at high speed, the liquid in the pool is guided through the respective water guide channels 4 to the water inlet seat 3 and pumped into the pump body cavity 2. At this time, the air pressure in the pump body cavity 2 is greater than the external water pressure. Most of the compressed air will be discharged from the exhaust valve provided on the pump housing of the submersible pump, and a small part of the compressed air will be discharged into the pool from the exhaust port 62. However, at low water levels, because the exhaust valve of the submersible pump is exposed to the air, the air in the pump body cavity 2 will be discharged into the pool from the exhaust port 62 on the seat 61. Finally, the submersible pump is able to pump at low water levels.

[0028] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A base on a submersible pump, comprising a base body (1); characterized in that: The base body (1) has a water inlet seat (3) at its center to draw water into the pump body cavity (2). The bottom surface of the base body (1) has a water guide channel (4) for water intake, and the water guide channel (4) is connected to the water inlet seat (3). The water guide channel (4) is arranged along the outer diameter edge of the water inlet seat (3) to the outer diameter edge of the base body (1), and the water guide channel (4) has several channels that are arranged radially along the radial direction of the base body (1). The upper center surface of the base body (1) has a cavity seat (6) for accommodating the impeller (5). The seat body (61) of the cavity seat (6) has an exhaust hole (62) for discharging part of the gas in the pump body cavity (2) to the outside.

2. The submersible pump base of claim 1, wherein: The width of the water guide channel (4) on the outer diameter side of the water inlet seat (3) is smaller than the width on the outer diameter side of the base body (1), and the channel wall (41) of the water guide channel (4) is arc-shaped.

3. The base on submersible pump as claimed in claim 1 wherein: The water inlet seat (3) includes a central cylinder (31) and a base plate (32). The base plate (32) is fixed on the axial end of the central cylinder (31), and the outer diameter of the base plate (32) is larger than the outer diameter of the central cylinder (31). A water suction channel (7) is formed between the outer circumferential wall of the central cylinder (31) and the upper end face of the base plate (32) and the center of the base body (1).

4. The base on submersible pump of claim 3, wherein: The end of the channel wall (41) on the side of the water guide channel (4) near the water inlet seat (3) is fixed to the outer peripheral wall of the central cylinder (31), the upper end face of the bottom plate (32), and the center of the base body (1).

5. The base on submersible pump as claimed in claim 4 wherein: The through hole provided in the bottom plate (32) is connected to the through hole of the central cylinder (31), and a fan blade-shaped grid (33) is provided on the inner wall of the through hole of the bottom plate (32).

6. The base on submersible pump of claim 1, wherein: The seat (61) of the cavity seat (6) protrudes upward along the top surface of the base body (1) and forms an annular groove (63). The groove opening of the annular groove (63) communicates with the bottom surface of the base body (1). The channel wall (41) of the water guiding channel (4) extends in the height direction to the bottom of the annular groove (63) and inside the groove. The channel wall (41) of each water guiding channel (4) is separated in the annular groove (63).

7. The submersible pump on base of claim 6, wherein: A baffle unit (8) is provided on the base body (1) corresponding to the vent (62), and the baffle unit (8) is located on one side of the channel wall of the water guide channel (4).

8. The submersible pump base of claim 7, wherein: The baffle unit (8) includes a baffle (81) and a side plate (82). The side plate (82) is disposed in the annular groove (63) and forms an exhaust channel (64) between it and the channel wall (41) of the water guiding channel (4). The baffle (81) is disposed between the end of the side plate (82) and the channel wall (41) of the water guiding channel (4), and the baffle (81) is flush with the bottom of the channel wall (41) of the water guiding channel (4).

9. The base on the submersible pump according to claim 1, characterized in that: The side of the cavity seat (6) is provided with a water inlet (65) that communicates with the water outlet of the pump body.

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