Multi-stage water pump with novel assembly mode

Abstract

The utility model provides a multistage water pump with a novel assembly mode, and belongs to the technical field of water pumps. The problem that in the prior art, an impeller is prone to being unstable in a traditional connecting mode is solved. The multi-stage water pump comprises an outer pump shell, a plurality of middle-section pump shells, a plurality of impeller bodies, a plurality of guide vane bodies, a multi-stage pump shaft, a water outlet joint and a water pump motor, the outer pump shell is arranged outside the middle-section pump shells, the impeller bodies and the guide vane bodies in a covering mode, a water inlet is formed in the side end of the outer pump shell, and the middle-section pump shells are in a cylinder shape with one side open. A sealing ring is formed on the front side of the guide vane body, a ball bearing is arranged in the sealing ring, a limiting groove is formed in the rear end face of the impeller body, one end of the sealing ring is attached to the limiting groove in the rear end face of the impeller body, and the other end of the sealing ring is attached to the limiting groove in the rear end face of the impeller body. A plurality of clamping hooks in a circumferential array are formed on the rear end face of the guide vane body, and inward clamping feet are formed at the ends of the clamping hooks. The utility model has the advantages of simple assembly and high assembly precision.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology and relates to a multi-stage water pump with a novel assembly method. Background Technology

[0002] Multistage pumps use impellers connected in series, with each impeller increasing the pressure step by step to achieve high-pressure liquid transportation. In the existing technology, the traditional connection of impellers requires disassembling a large number of parts, and replacing vulnerable parts such as impellers is time-consuming, increasing downtime and maintenance costs.

[0003] Chinese patent publication number CN208089552U discloses a multi-stage high-efficiency water pump, including a pump body, a first blade disposed within the pump body, several guide tubes disposed on one side of the pump body, a second blade disposed between each two adjacent guide tubes, both the first and second blades disposed on a rotating shaft, the rotating shaft being connected to a motor, the guide tubes including a guide disc sleeved outside the rotating shaft, and an annular cavity disposed between the guide disc and the rotating shaft, a guide blade disposed on the side of the guide disc near the second blade, the guide blade having a cavity structure communicating with the outside, the cavity structure communicating with the annular cavity.

[0004] In the multi-stage high-efficiency water pump provided by this patent, blade one and blade two are connected to the rotating shaft by a flat key. When disassembling, the entire multi-stage impeller assembly needs to be disassembled, which is inconvenient. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a novel assembly method for a multi-stage water pump.

[0006] The objective of this utility model can be achieved through the following technical solution: A novel multi-stage water pump assembly method includes an outer pump casing, a middle pump casing, an impeller body, a guide vane body, a multi-stage pump shaft, an outlet section, and a water pump motor. The number of the middle pump casing, impeller body, and guide vane body is several, and the outer pump casing covers the outside of the middle pump casing, impeller body, and guide vane body. An inlet is formed at the side end of the outer pump casing. The middle pump casing is a cylindrical shape with one side opening. Several circumferentially arrayed locking blocks are provided on the inner wall of one side of the middle pump casing, and locking grooves are formed in the locking blocks. A sealing ring is formed on the front side of the guide vane body, and a ball bearing is provided inside the sealing ring. A limiting groove is formed in the rear end face of the impeller body, and one end of the sealing ring fits into the limiting groove on the rear end face of the impeller body. Several circumferentially arrayed hooks are formed on the rear end face of the guide vane body, and inwardly pointing locking feet are formed at the ends of the hooks, which extend into the locking grooves.

[0007] In the multi-stage water pump with the above-mentioned novel assembly method, connecting protrusions are formed on both sides of the outer periphery of the middle section pump casing, and the end faces of the connecting protrusions of adjacent middle section pump casings fit together.

[0008] In the multi-stage water pump with the above-mentioned novel assembly method, a shoulder is provided in the multi-stage pump shaft, and the shoulder is installed inside the sealing ring of the last stage guide vane.

[0009] In the multi-stage water pump with the above-mentioned novel assembly method, the outlet section is installed on the rear side of the last stage guide vane body, and the water pump motor is installed on the rear side of the outlet section.

[0010] In the multi-stage water pump with the above-mentioned novel assembly method, a sealing ring is fixedly installed at the end of the outlet section, a connecting step is formed in the sealing ring, and the outer pump casing is fixedly connected to the connecting step.

[0011] Compared with the prior art, the multi-stage water pump with a novel assembly method provided by this utility model has the following beneficial effects: 1. Connection between the intermediate pump casing and the guide vane: Through the cooperation of the locking blocks and hooks, it can be plugged in and fastened immediately, without the need for traditional bolt fastening or welding, simplifying the assembly process; 2. The intermediate pump casing, impeller body, and guide vane body can be disassembled and replaced independently. For example, when repairing a certain stage impeller, it is only necessary to separate the corresponding guide vane body's buckle, without disassembling the entire pump; 3. The circumferential array distribution of the locking blocks and hooks ensures the circumferential positioning accuracy of the guide vane body and the intermediate pump casing. The sealing ring at the front end of the guide vane body fits into the limiting groove at the rear end of the impeller body to achieve axial positioning, while reducing friction through ball bearings. Attached Figure Description

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

[0013] Figure 2 This is a schematic cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the middle section pump casing structure;

[0015] Figure 4 This is a schematic diagram of the impeller body structure;

[0016] Figure 5 This is a schematic diagram of the guide vane structure.

[0017] In the diagram: 1. Outer pump casing; 11. Inlet; 2. Intermediate pump casing; 21. Locking block; 22. Locking groove; 23. Connecting protrusion; 3. Impeller body; 31. Limiting groove; 4. Guide vane body; 41. Sealing ring; 42. Locking hook; 43. Locking foot; 5. Multistage pump shaft; 51. Shaft shoulder; 6. Outlet section; 7. Pump motor; 8. Ball bearing; 9. Sealing ring; 91. Connecting step. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figures 1 to 5 As shown, this embodiment includes an outer pump casing 1, a middle pump casing 2, an impeller body 3, a guide vane body 4, a multi-stage pump shaft 5, an outlet section 6, and a water pump motor 7. The number of middle pump casings 2, impeller bodies 3, and guide vane bodies 4 is several, and the outer pump casing 1 covers the outside of the middle pump casings 2, impeller bodies 3, and guide vane bodies 4. The multi-stage pump shaft 5 sequentially passes through each middle pump casing 2, impeller body 3, and guide vane body 4. The outlet section 6 is installed behind the last stage guide vane body 4, and the water pump motor 7 is installed behind the outlet section 6. An inlet 11 is formed at one end of the outer pump casing 1. The middle pump casing 2 is a cylindrical shape with one side opening. Several circumferentially arrayed locking blocks 21 are provided on the inner wall of one side of the middle pump casing 2. Each locking block 21 contains... A through slot 22 is provided, and a sealing ring 41 is formed on the front side of the guide vane body 4. A ball bearing 8 is provided inside the sealing ring 41. A shoulder 51 is provided in the multi-stage pump shaft 5. The shoulder 51 is installed inside the sealing ring 41 of the last stage guide vane. A limiting groove 31 is provided in the rear end face of the impeller body 3. One end of the sealing ring 41 fits into the limiting groove 31 on the rear end face of the impeller body 3. Several hooks 42 arranged in a circumferential array and positioned at the same position as the locking block 21 are formed on the rear end face of the guide vane body 4. The end of the hook 42 forms an inwardly extending locking foot 43. The hook 42 extends into the slot 22 and the locking foot 43 fixes the hook 42 to the locking block 21. This structure fixes the guide vane body 4 to the middle section pump casing 2.

[0020] like Figure 2 As shown, connecting protrusions 23 are formed on both sides of the outer periphery of the middle section pump casing 2. The side end faces of the connecting protrusions 23 of two adjacent middle section pump casings 2 fit together to achieve a stable structure between two adjacent middle section pump casings 2.

[0021] To elaborate further, such as Figures 1 to 2 As shown, a sealing ring 9 is fixedly installed at the end of the water outlet section 6, and a connecting step 91 is formed in the sealing ring 9. The outer pump housing 1 is fixedly connected to the connecting step 91 to ensure the sealing between the outer pump housing 1 and the water outlet section 6.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A new type of multi-stage water pump with an assembly method, comprising an outer pump shell (1), a middle section pump shell (2), an impeller body (3), a guide vane body (4), a multi-stage pump shaft (5), a water outlet section (6) and a water pump motor (7), characterized in that: The number of the intermediate pump casing (2), impeller body (3), and guide vane body (4) is several, and the outer pump casing (1) covers the outside of the intermediate pump casing (2), impeller body (3), and guide vane body (4). The outer pump casing (1) has an inlet (11) formed at one end. The intermediate pump casing (2) is a cylindrical shape with one side opening. Several circumferentially arranged locking blocks (21) are provided on the inner wall of one side of the intermediate pump casing (2). The locking blocks (21) have locking grooves (22). The guide vane body ( 4) A sealing ring (41) is formed on the front side, and a ball bearing (8) is provided inside the sealing ring (41). A limiting groove (31) is opened in the rear end face of the impeller body (3). One end of the sealing ring (41) is in contact with the limiting groove (31) on the rear end face of the impeller body (3). A plurality of hooks (42) arranged in a circular array are formed on the rear end face of the guide vane body (4). An inwardly facing foot (43) is formed at the end of the hook (42). The hook (42) extends into the groove (22).

2. A multi-stage water pump of a new assembly method according to claim 1, characterized in that: Connecting protrusions (23) are formed on both sides of the outer periphery of the middle section pump housing (2), and the side end faces of the connecting protrusions (23) of adjacent middle section pump housings (2) are in contact with each other.

3. A multi-stage water pump of a new assembly method according to claim 1, characterized in that: The multi-stage pump shaft (5) is provided with a shoulder (51), which is installed inside the sealing ring (41) of the last stage guide vane.

4. A multi-stage water pump of a new assembly method according to claim 1, characterized in that: The outlet section (6) is installed on the rear side of the last stage guide vane (4), and the water pump motor (7) is installed on the rear side of the outlet section (6).

5. A multi-stage water pump of a new assembly method according to claim 1, characterized in that: A sealing ring (9) is fixedly installed at the end of the water outlet section (6), and a connecting step (91) is formed in the sealing ring (9). The outer pump housing (1) is fixedly connected to the connecting step (91).

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