Pump cover and vertical multi-stage pump

Abstract

The utility model aims to provide a pump cover with positioning and guide supporting and pressing functions and a vertical multi-stage pump. The pump cover comprises a pump cover body, wherein an end face is formed on the pump cover body; the positioning flange is arranged in the middle of the end face, and the positioning flange is used for positioning a multistage pump motor; the guide supporting part is arranged on the bottom surface of the pump cover body, a supporting surface and a guide block are formed on the guide supporting part, the supporting surface is arranged on the inner side wall of the pump cover body, the guide block is arranged on the bottom surface of the pump cover body, and the supporting surface and the supporting block are used for positioning and supporting a multistage pump. The pump cover is applied to the technical field of pump covers of vertical multi-stage pumps.

Description

Technical Field

[0001] This utility model relates to the technical field of pump covers for vertical multistage pumps, and particularly to a pump cover and a vertical multistage pump. Background Technology

[0002] Most existing water pumps are single-stage pumps. To increase the head, multiple pumps are connected in series. Therefore, the head of a single pump is often limited by the pump body structure. To increase the head, multiple pumps need to be connected in series. However, this series connection of combined pumps is problematic. Vertical multistage centrifugal pumps, also known as CDLF vertical multistage centrifugal pumps, are non-self-priming vertical multistage centrifugal pumps designed and manufactured by incorporating advanced technologies from home and abroad. They use standard vertical motors and quick-install mechanical seals, making replacement very convenient. After being launched on the market, they have gained popularity due to their high efficiency, energy saving, reliable quality, and wide range of applications. Currently, commonly used multistage pumps generally connect the pump body and drive motor through a pump cover. The pump cover is usually positioned using flanges to position the drive motor. The additional flanges increase the assembly difficulty and also increase the height of the multistage pump, requiring excessive space. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a pump cover with positioning and guiding support and clamping and a vertical multistage pump.

[0004] The technical solution adopted by this utility model is as follows: This utility model includes a pump cover body, the pump cover body having an end face; a positioning flange, the positioning flange being disposed in the middle of the end face, the positioning flange being used to position a multi-stage pump motor; and a guide support part, the guide support part being disposed on the bottom surface of the pump cover body, the guide support part having a support surface and a guide block, the support surface being disposed on the inner sidewall of the pump cover body, the guide block being disposed on the bottom surface of the pump cover body, the support surface and the guide block being used to position and support the multi-stage pump.

[0005] Furthermore, a mounting hole is formed in the middle of the pump cover.

[0006] Furthermore, the guide block has a positioning surface and a guide groove, the positioning surface is located in the middle of the guide block, and the guide groove is located between the positioning surface and the support surface.

[0007] Furthermore, a hollow groove is formed on the bottom surface of the pump cover, and the hollow groove is triangular in shape.

[0008] Furthermore, the side wall of the pump cover is provided with an exhaust hole, and the angle between the exhaust hole and the bottom surface of the pump cover is in the range of 30-45 degrees.

[0009] Furthermore, the end face is formed with a drain outlet, and the drain outlet is formed with a first drain section and a second drain section. The first drain section is perpendicular to the end face, and the second drain section is parallel to the end face and connected to the side wall of the pump cover.

[0010] Furthermore, the end face is a circular plane.

[0011] Furthermore, this utility model also provides a vertical multistage pump, including a pump body, a connecting bracket and a drive motor. The movable end of the drive motor is engaged with the pump body for transmission. The pump body is guided and connected to the bottom surface of the pump cover. The first side of the connecting bracket is positioned and engaged with the positioning flange (2) of the pump cover. The second side of the connecting bracket is connected to the drive motor.

[0012] Furthermore, the pump body is provided with a sleeve, an impeller, guide vanes, and a pump shaft. The sleeve is connected to the pump cover through the support surface and the guide block. The pump shaft is rotatably installed in the pump body. The impeller and the guide vanes are both connected to the pump shaft. The drive motor is connected to the pump shaft through a coupling.

[0013] The beneficial effects of this utility model are as follows: Since the positioning flange of this utility model is higher than the end face of the pump cover, and the positioning flange is circular, multiple sets of positioning threaded holes are provided on the end face of the pump cover. The positioning threaded holes, together with screws, lock and fix the multi-stage pump motor to the pump cover. When the multi-stage pump motor is installed, it is positioned by the positioning flange, eliminating the need for additional circumferential positioning blocks, reducing usage costs, simplifying the disassembly and assembly process, facilitating daily maintenance by staff, and the overall structure is shorter, occupying less space. The support surface is set on the inner wall of the pump cover, and the vertical multi-stage pump is tightly fitted with the support surface during installation. With the help of guide blocks, the pump cover is tightly fixed to the vertical multi-stage pump, and the pump cover is not easy to shake or fall off during the locking process. Attached Figure Description

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

[0015] Figure 2 This is another perspective of the structural schematic diagram of this utility model;

[0016] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0017] Figure 4 This is a cross-sectional view of the present invention;

[0018] Figure 5 This is a structural schematic diagram of the vertical multistage pump of this utility model. Detailed Implementation

[0019] like Figures 1 to 4As shown, in this embodiment, the present invention includes a pump cover body 1, which has an end face 11; a positioning flange 2, which is disposed in the middle of the end face 11 and is used to position a multi-stage pump motor; and a guide support part 3, which is disposed on the bottom surface of the pump cover body 1 and has a support surface 31 and a guide block 32. The support surface 31 is disposed on the inner sidewall of the pump cover body 1, and the guide block 32 is disposed on the bottom surface of the pump cover body 1. The support surface 31 and the guide block 32 are used to position and support the multi-stage pump. The positioning flange 2 is higher than the end face 11 of the pump cover body 1 and is circular in shape. Multiple sets of positioning threaded holes are provided on the end face 11. The positioning threaded holes, together with screws, lock and fix the multistage pump motor to the pump cover 1. When the vertical multistage pump motor is installed, it is positioned by the positioning flange 2, without the need for additional circumferential positioning blocks, which reduces the cost of use, simplifies the disassembly and assembly process, facilitates daily maintenance by staff, and the overall structure is shorter, occupying less space. One or more sets of guide blocks 32 are provided. Multiple sets of guide blocks 32 are equally spaced on the bottom surface of the pump cover 1. The support surface 31 is provided on the inner wall of the pump cover 1. When the vertical multistage pump is installed, it fits tightly with the support surface 31. With the help of the guide blocks 32, the pump cover 1 is tightly fixed to the vertical multistage pump. During the locking process, the pump cover 1 is not easy to shake or fall off.

[0020] In this embodiment, a mounting hole 12 is formed in the middle of the pump cover body 1. A protruding edge is provided on the side of the mounting hole 12 near the bottom of the pump cover body 1. The protruding edge fits into the mechanical seal of the vertical multistage pump shaft 74 to prevent liquid leakage.

[0021] In this embodiment, the guide block 32 has a positioning surface 321 and a guide groove 322. The positioning surface 321 is disposed in the middle of the guide block 32, and the guide groove 322 is disposed between the positioning surface 321 and the support surface 31.

[0022] In this embodiment, a hollow groove 4 is formed on the bottom surface of the pump cover 1. The hollow groove 4 is triangular and is evenly arranged at the four corners of the pump cover 1. The hollowing at the four corners significantly reduces weight, and the material consumption of the entire design structure is reduced by more than 30% compared with similar products on the market.

[0023] In this embodiment, the side wall of the pump cover 1 is provided with an exhaust hole 5, and the angle between the exhaust hole 5 and the bottom surface of the pump cover 1 is in the range of 30-45 degrees.

[0024] In this embodiment, the end face 11 is formed with a drain outlet 6, and the drain outlet 6 is formed with a first drain section 61 and a second drain section 62. The first drain section 61 is perpendicular to the end face 11, and the second drain section 62 is parallel to the end face 11 and connected to the side wall of the pump cover 1.

[0025] In this embodiment, the end face 11 is a circular plane.

[0026] like Figure 5 As shown, in this embodiment, a vertical multistage pump is also provided, including a pump body 7, a connecting bracket 8, and a drive motor 9. The movable end of the drive motor 9 is engaged with the pump body 7 for transmission. The pump body 7 is guided and connected to the bottom surface of the pump cover. The first side of the connecting bracket 8 is positioned and engaged with the positioning flange 2 of the pump cover. The second side of the connecting bracket 8 is connected to the drive motor 9.

[0027] In this embodiment, the pump body 7, the connecting bracket 8, and the drive motor 9 are included. The movable end of the drive motor 9 is engaged with the pump body 7 for transmission. The pump body 7 is guided and connected to the bottom surface of the pump cover. The first side of the connecting bracket 8 is positioned and engaged with the positioning flange 2 of the pump cover. The second side of the connecting bracket 8 is connected to the drive motor 9.

[0028] In this embodiment, the pump body 7 is provided with a sleeve 71, an impeller 72, a guide vane 73, and a pump shaft 74. The sleeve 71 is connected to the pump cover through the support surface 31 and the guide block 32. The pump shaft 74 is rotatably installed inside the pump body 7. The impeller 72 and the guide vane 73 are both connected to the pump shaft 74. The movable end of the drive motor 9 is connected to the pump shaft 74 through a coupling 91.

[0029] The working principle of this utility model:

[0030] The vertical multistage pump drives the coupling 91 via the drive motor 9. The coupling 91 drives the pump shaft 74 to rotate. The impeller 72 and guide vane 73 are sleeved on the pump shaft 74. The pump cover is fixedly connected to the pump body 7 via the support surface 31 and guide block 32, and is locked with screws. One side of the end face 11 of the pump cover is guided and positioned by the positioning flange 2 and locked with screws. For each rotation of the shaft, the multistage pump performs at least two liquid suctions and at least two liquid discharges.

[0031] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. A pump cover, said pump cover being applied to a multi-stage pump, characterized in that: The pump cover includes Pump cover (1), the pump cover (1) having an end face (11); Positioning flange (2), the positioning flange (2) is disposed in the middle of the end face (11), the positioning flange (2) is used to position the multi-stage pump motor; A guide support part (3) is provided on the bottom surface of the pump cover body (1). The guide support part (3) has a support surface (31) and a guide block (32). The support surface (31) is provided on the inner side wall of the pump cover body (1), and the guide block (32) is provided on the bottom surface of the pump cover body (1). The support surface (31) and the guide block (32) are used to position and support the multi-stage pump.

2. A pump cover according to claim 1, characterized in that: The pump cover (1) has a mounting hole (12) formed in the middle.

3. A pump cover according to claim 1, characterized in that: The guide block (32) has a positioning surface (321) and a guide groove (322). The positioning surface (321) is located in the middle of the guide block (32), and the guide groove (322) is located between the positioning surface (321) and the support surface (31).

4. A pump cover according to claim 1, characterized in that: The bottom surface of the pump cover (1) has a hollow groove (4) which is triangular in shape.

5. A pump cover according to claim 1, characterized in that: The side wall of the pump cover (1) is provided with an exhaust hole (5), and the angle between the exhaust hole (5) and the bottom surface of the pump cover (1) is 30-45 degrees.

6. A pump cover according to claim 1, characterized in that: The end face (11) has a drain outlet (6), and the drain outlet (6) has a first drain section (61) and a second drain section (62). The first drain section (61) is perpendicular to the end face (11), and the second drain section (62) is parallel to the end face (11) and connected to the side wall of the pump cover (1).

7. A pump cover according to claim 1, characterized in that: The end face (11) is a circular plane.

8. A vertical multistage pump comprising the pump cover according to any one of claims 1-7, characterized in that: It includes a pump body (7), a connecting bracket (8) and a drive motor (9). The movable end of the drive motor (9) is engaged with the pump body (7) for transmission. The pump body (7) is guided and connected to the bottom surface of the pump cover. The first side of the connecting bracket (8) is positioned and engaged with the positioning flange (2) of the pump cover. The second side of the connecting bracket (8) is connected to the drive motor (9).

9. A vertical multistage pump according to claim 8, characterized in that: The pump body (7) is provided with a sleeve (71), an impeller (72), a guide vane (73) and a pump shaft (74). The sleeve (71) is connected to the pump cover through the support surface (31) and the guide block (32). The pump shaft (74) is rotatably installed inside the pump body (7). The impeller (72) and the guide vane (73) are both connected to the pump shaft (74). The drive motor (9) is connected to the pump shaft (74) through a coupling (91).

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