Spliced pump set

Abstract

The utility model provides a splicing pump set which comprises at least two cylindrical pump shells, motors coaxially installed in the pump shells, impellers coaxially installed at the output ends of rotating shafts of the motors and an annular connecting piece, and the two ends of the annular connecting piece are in interference fit with the two adjacent pump shells respectively. According to the utility model, each pump is made into a pump shell with a standard specification, and two adjacent pump shells are respectively in interference fit through the two ends of the annular connecting piece, so that the two adjacent pump shells can be quickly connected in series and mounted, and the short annular connecting piece is adopted; kinetic energy loss caused by too long pipelines and installation inconvenience caused by too short pipelines when traditional pipelines are adopted for communication are avoided, rapid assembly is achieved according to lift requirements of use scenes, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the field of liquid conveying devices, in particular to a spliced ​​pump group. Background Art

[0002] A pump is a device that converts the mechanical energy of the prime mover into liquid energy by relying on the high-speed rotation of the impeller. According to the shape of the blades and the direction of water discharge from the impeller, it can be divided into centrifugal pumps, axial flow pumps, mixed flow pumps, etc. According to its function, it can be divided into water pumps, deep well pumps, pipeline pumps, etc.

[0003] Since the fluid delivery capacity of a single pump is limited and cannot be applied to different scenarios at the same time, when the head needs to be increased, multiple pumps are usually connected in series, and a pipe is generally used to connect the outlet of one pump to the inlet of another pump. However, due to the different apertures of the inlet and outlet of different pumps, special pipes are required, which are troublesome to install, and there are also requirements for the length of the pipe. If the pipe is too short, it is not convenient to install the pipe, and the pipe process may cause excessive fluid kinetic energy loss between two adjacent pumps. Therefore, there is an urgent need for a spliced ​​pump set that can be quickly installed. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a spliced ​​pump group that can be quickly installed.

[0005] The purpose of the utility model is achieved through the following technical measures: a spliced ​​pump group, including at least two cylindrical pump casings, motors coaxially installed in each pump casing, and an impeller coaxially installed at the output end of the motor's rotating shaft, and also includes an annular connecting member, the two ends of the annular connecting member are respectively interference fit with two adjacent pump casings.

[0006] Preferably, a sealing rubber ring is provided at the interference fit between the annular connecting piece and the pump casing, and the sealing rubber ring is located between the inner wall of the pump casing and the outer wall of the annular connecting piece.

[0007] Preferably, a bracket is coaxially provided on the inner wall of each pump casing, the rotating shaft of the motor is mounted on the bracket through a bearing, and a guide hole is opened in the center of the bracket.

[0008] Preferably, the bracket is provided with a supporting ridge, and the supporting ridge abuts against the outer wall of the motor in the adjacent pump casing.

[0009] Preferably, the connection between the edge of the bracket and the corresponding inner wall of the pump casing is rounded.

[0010] Preferably, thrust rings are provided at both ends of the bearing of the motor shaft.

[0011] Preferably, the rotating shaft of each motor is provided with heat dissipation holes along the central axis.

[0012] Preferably, it also includes a water inlet section with a water inlet through hole and a water outlet section with a water outlet through hole. The water inlet section and the water outlet section are respectively covered on the two pump casing end faces at both ends. The water inlet through hole and the water outlet through hole are respectively communicated with the inner cavity of the pump casing. Compared with the spliced ​​pump group structure of the prior art, it has the following advantages:

[0013] Each pump is made into a pump casing of standard specifications, and two adjacent pump casings are respectively interference-fitted at both ends of the annular connector, so as to achieve rapid series installation between the two adjacent pump casings. A shorter annular connector can be used to avoid kinetic energy loss caused by too long pipes when connecting with traditional pipes and installation inconvenience caused by too short pipes. It can be quickly assembled according to the head requirements of the usage scenario and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural diagram of the spliced ​​pump group in Example 1.

[0015] Figure 2 This is the structure of the annular connector and the bracket in Example 1.

[0016] Figure 3 It is a cross-sectional structural diagram of the spliced ​​pump group in Example 2.

[0017] Among them: 10, pump housing 10; 20, motor 20; 201, rotating shaft 201; 2011, heat dissipation through hole 2011; 30, impeller 30; 40, annular connector 40; 50, sealing rubber ring 50; 60, bracket 60; 601, supporting ridge 601; 602, flow guide hole 602; 70, thrust ring 70; 80, water inlet section 80; 90, water outlet section 90. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are described in detail below, and examples of the specific embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example 1

[0022] like Figure 1-2 As shown, this specific embodiment provides a spliced ​​pump unit, including two cylindrical pump casings 10, a motor 20 coaxially installed in each pump casing 10, an impeller 30 coaxially installed at the output end of the rotating shaft 201 of the motor 20, and an annular connector 40, the two ends of which are respectively interference fit with two adjacent pump casings 10. A sealing rubber ring 50 is provided at the interference fit between the annular connector 40 and the pump casing 10, and the sealing rubber ring 50 is located between the inner wall of the pump casing 10 and the outer wall of the annular connector 40.

[0023] Working principle: The outer wall near the two ends of the annular connector 40 is equivalent to the "shaft" structure in the interference fit, and the two ends of the pump housing 10 are equivalent to the "hole" structure in the interference fit. The interference fit is achieved by using the tolerance fit of the "shaft" and "hole" structures. Two adjacent pump housings 10 are respectively interference fit at the two ends of the same annular connector 40, which can realize the rapid installation between the two adjacent pump housings 10, that is, the rapid series connection between the two pumps. A sealing rubber ring 50 is added to the interference fit interface to enhance the sealing of the interference fit interface.

[0024] In order to further improve the rotation stability of the rotating shaft 201, a bracket 60 is coaxially provided on the inner wall of the pump housing 10, and the rotating shaft 201 of the motor 20 is mounted on the bracket 60 through a bearing, and a guide hole 602 is opened in the center of the bracket 60. The rotating shaft 201 of the motor 20 is mounted on the motor 20 body through a bearing, forming at least two coaxial bearings to fix the rotating shaft 201, ensuring the smooth rotation of the rotating shaft 201 and avoiding radial vibration.

[0025] To assist in fixing the motor 20, the bracket 60 is provided with a supporting ridge 601, which abuts against the outer wall of the motor 20 in the adjacent pump housing 10. After the annular connector 40 and the pump housing 10 complete the interference fit, the supporting ridge 601 can support the motor 20 body.

[0026] In order to avoid the loss of kinetic energy of the fluid, the edge of the bracket 60 and the corresponding inner wall of the pump housing 10 are connected with a rounded transition. The liquid transported by the impeller 30 is transported to the connection between the edge of the bracket 60 and the corresponding inner wall of the pump housing 10 by centrifugal force. The connection adopts a rounded transition, and the fluid flows smoothly and converges to the guide hole 602 to enter the next inner cavity of the pump housing 10, reducing the loss of fluid kinetic energy caused by turbulence caused by the collision of the fluid with the connection.

[0027] To ensure that the bearing is stably connected to the rotating shaft 201 , thrust rings 70 are provided at both ends of the bearing of the rotating shaft 201 of the motor 20 .

[0028] To enhance the heat dissipation of the rotating shaft 201 , a heat dissipation through hole 2011 is formed along the central axis of the rotating shaft 201 of each motor 20 .

[0029] Example 2

[0030] like Figure 3 As shown, the structure of this embodiment is similar to that of embodiment 1, except that the spliced ​​pump assembly of this embodiment consists of six pump casings 10 connected by five annular connectors 40, and the ends of the first pump casing 10 and the sixth pump casing 10 that are not interference fit with the annular connector 40 respectively cover the water inlet section 80 and the water outlet section 90.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A spliced ​​pump unit, comprising at least two cylindrical pump casings, a motor coaxially mounted in each of the pump casings, and an impeller coaxially mounted at the output end of the rotating shaft of the motor, characterized in that: It also includes an annular connecting piece, and two ends of the annular connecting piece are respectively interference-fitted with two adjacent pump shells.

2. The spliced ​​pump set according to claim 1, characterized in that: A sealing rubber ring is provided at the interference fit between the annular connecting piece and the pump housing, and the sealing rubber ring is located between the inner wall of the pump housing and the outer wall of the annular connecting piece.

3. The spliced ​​pump set according to claim 2, characterized in that: A bracket is coaxially arranged on the inner wall of each pump housing, the rotating shaft of the motor is mounted on the bracket through a bearing, and a guide hole is opened at the center of the bracket.

4. The spliced ​​pump set according to claim 3, characterized in that: The bracket is provided with a supporting ridge, and the supporting ridge abuts against the outer wall of the motor in the adjacent pump housing.

5. The spliced ​​pump set according to claim 4, characterized in that: The connection between the edge of the bracket and the corresponding inner wall of the pump casing is rounded.

6. The spliced ​​pump set according to claim 5, characterized in that: Thrust rings are arranged at both ends of the bearing of the motor shaft.

7. The spliced ​​pump set according to claim 1, characterized in that: The rotating shaft of each motor is provided with a heat dissipation through hole along the central axis.

8. The spliced ​​pump assembly according to claim 6 or 7, characterized in that: It also includes a water inlet joint with a water inlet through hole and a water outlet joint with a water outlet through hole. The water inlet joint and the water outlet joint are respectively covered on the two end faces of the pump casing at both ends, and the water inlet through hole and the water outlet through hole are respectively communicated with the inner cavity of the pump casing.

Images