Vertical multi-stage centrifugal pump connecting structure

Abstract

The utility model provides a vertical multi-stage centrifugal pump connecting structure, belongs to the technical field of water pumps, and solves the problems that vortex and turbulent flow are easily generated at the connecting structure of a multi-stage pump, condensate water is generated at a motor in a low-temperature environment, and a sealing element is aged and adhered. A drainage hole and a water outlet are formed in the pump body, a pump groove and a motor groove are formed in the pump body, the drainage hole and the water outlet are connected in the pump groove, a flow guide plate is arranged in the pump groove, a second shaft hole is formed in the pump groove, the interior of the motor groove is divided into a connecting groove and a first shaft hole, a reinforcing rib is arranged outside the pump body, and a connecting lug is arranged on the reinforcing rib. An arc-shaped groove is formed in the connecting lug, and a drainage groove is formed in the pump body. The utility model has the advantages that the guide plate is arranged in the pump groove, so that the generation of vortex and turbulence is reduced, and the vibration and noise of the pump body are reduced; the drainage groove is formed to drain condensate water generated in the motor groove, the service life of the motor is prolonged, and the mass of the pump body is reduced; and the arc-edge groove is formed, so that the sealing element is convenient to disassemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps, relates to a water pump structure, and particularly relates to a connection structure of a vertical multi-stage centrifugal pump. Background Art

[0002] A vertical multi-stage centrifugal pump is a centrifugal pump with a compact overall structure, small volume, light weight, low noise, remarkable energy-saving effect, and convenient maintenance.

[0003] When the connection structure of the vertical multi-stage centrifugal pump discharges water, there are turbulences and vortices in the water flow, resulting in a large axial force in the fluid. Due to the multi-stages of the centrifugal pump, the axial force is large, the water pump vibrates greatly during operation, and the generated noise is large; during the long-term operation of the multi-stage pump, the seals between the multi-stage pump bodies will age, resulting in the adhesion of the seals, which is inconvenient for disassembly and replacement; when the multi-stage pump works in a low-temperature environment, condensate will be generated at the connection between the pump body and the motor. It is difficult for the condensate to drain out of the pump body by itself. As the condensate accumulates, the performance of the motor will also be affected. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connection structure of a vertical multi-stage centrifugal pump that reduces vibration during operation, is convenient for disassembly and assembly, and can drain water, aiming at the above problems existing in the prior art.

[0005] The utility model can be realized by the following technical solutions: A connection structure of a vertical multi-stage centrifugal pump includes a pump body. A drain port and a water outlet are arranged on the outer surface of the pump body. A motor slot and a pump slot are opened in the pump body. A first shaft hole and a connection slot are opened in the motor slot. The drain port and the water outlet are connected to the pump slot. A guide vane is installed in the pump slot. A second shaft hole is opened in the pump slot. The pump body is surrounded by reinforcing ribs, and connection lugs are arranged on the reinforcing ribs.

[0006] In the above connection structure of the vertical multi-stage centrifugal pump, the guide vane is arc-shaped, and the arc opening of the guide vane faces the water outlet.

[0007] In the above connection structure of the vertical multi-stage centrifugal pump, an arc-edge groove is opened in the connection lug.

[0008] In the above connection structure of the vertical multi-stage centrifugal pump, a drain groove is opened beside the pump body.

[0009] In the above connection structure of the vertical multi-stage centrifugal pump, the drain groove penetrates to the first shaft hole and the second shaft hole, and a drain hole is opened at the connection slot, and the drain hole penetrates to the drain groove.

[0010] In the above connection structure of the vertical multi-stage centrifugal pump, a chamfer is opened at the first shaft hole.

[0011] Compared with the prior art, the advantages of the present utility model are as follows: a flow guiding plate is added in the pump groove of the pump body to reduce the generation of turbulence and vortices; a drain groove is provided to facilitate the discharge of condensed water generated in a low-temperature environment, thereby increasing the service life of the motor; an arc-shaped groove is formed in the connecting lug to facilitate the replacement of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the front view of the connection structure of the vertical multi-stage centrifugal pump;

[0013] Figure 2 is the rear view of the connection structure of the vertical multi-stage centrifugal pump;

[0014] Figure 3 is the side view of the connection structure of the vertical multi-stage centrifugal pump;

[0015] Figure 4 is the sectional view of the connection structure of the vertical multi-stage centrifugal pump;

[0016] Among them, 1. pump body; 2. drain port; 3. water outlet; 4. motor slot; 41. first shaft hole; 411. chamfer; 42. connection slot; 421. drain hole; 5. pump slot; 51. flow guiding plate; 511. arc-shaped opening; 52. second shaft hole; 6. reinforcing rib; 61. connecting lug; 611. arc-shaped groove; 7. drain groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following are specific embodiments of the present utility model in combination with the drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0018] As Figures 1 to 4 shown, the present utility model can be realized through the following embodiments: a connection structure of a vertical multi-stage centrifugal pump, including a pump body 1, a drain port 2 and a water outlet 3 are arranged on the outer surface of the pump body 1, a motor slot 4 and a pump slot 5 are formed in the pump body 1, a shaft hole and a connection slot 42 are formed in the motor slot 4, the water inlet and the water outlet 3 are connected to the pump slot 5, a flow guiding plate 51 is installed in the pump slot 5, a second shaft hole 52 is formed in the pump slot 5, a reinforcing rib 6 is wound around the pump body 1, and a connecting lug 61 is arranged on the reinforcing rib 6.

[0019] The drain port 2 is provided to remove the residual water in the pump slot 5 when necessary, the motor slot 4 is used to connect with the motor, and the shaft hole is used to provide space for the motor shaft to extend into the pump slot 5; the flow guiding plate 51 installed in the pump slot 5 is used to guide the water flow and reduce the generation of turbulence and vortices; the reinforcing rib 6 is used to enhance the structural strength of the pump body 1; the connecting lug 61 is used to install connecting parts to connect with other pump bodies 1, and the first shaft hole 41 and the second shaft hole 52 are used to guide the installation of the motor shaft.

[0020] As Figure 2 andFigure 4 As shown in the figure, the flow deflector 51 is arc-shaped, and the arc opening 511 of the flow deflector 51 faces the water outlet 3. The arc-shaped flow deflector 51 fits the streamline shape, which can reduce the impact force generated by the water flow and prevent the generation of vortices and turbulences; the arc opening 511 of the flow deflector 51 faces the water outlet 3, which can effectively guide the water flow to output from the water outlet 3, reduce the bubbles generated by the mutual impact of the water flow, and reduce the erosion of the pump body 1 caused by the water flow.

[0021] As Figure 2 and Figure 3 shown in the figure, an arc-edge groove 611 is provided on the connecting lug 61. The provision of the arc-edge groove 611 creates a gap between the sealing devices, preventing the adhesion of the sealing devices after aging and making disassembly and assembly difficult.

[0022] As Figure 3 and Figure 4 shown in the figure, a drainage groove 7 is provided beside the pump body 1. The drainage groove 7 is provided for draining the condensed water generated due to low temperature in the motor groove 4 and the first shaft hole 41, preventing the condensed water from affecting the performance of the motor.

[0023] As Figure 1 and Figure 4 shown in the figure, the drainage groove 7 penetrates to the first shaft hole 41 and the second shaft hole 52, and a drainage hole 421 is provided at the connecting groove 42, and the drainage hole 421 penetrates to the drainage groove 7. The drainage groove 7 penetrating to the first shaft hole 41 and the second shaft hole 52 facilitates the drainage of the condensed water generated at the first shaft hole 41, and the provision of the drainage hole 421 is for draining the condensed water in the connecting groove 42, preventing the condensed water from affecting the performance of the motor.

[0024] As Figure 4 shown in the figure, a chamfer 411 is provided at the first shaft hole 41. The provision of the chamfer 411 enables the condensed water to flow into the drainage groove 7 under the influence of gravity, facilitating the removal of the condensed water in the first shaft hole 41.

[0025] The working principle of the present utility model: After the water flow enters the pump groove 5, it is drawn by the rotating impeller and flows out towards the water outlet 3. After the water flow contacts the flow deflector 51, since the flow deflector 51 is arc-shaped, the water flow does not impact with the flow deflector 51 or other water flows and flows out from the water outlet 3; when working in a low-temperature environment, the condensed water generated in the motor groove 4 flows into the drainage groove 7 from the drainage hole 421 and the chamfer 411 under the influence of gravity and is discharged along the drainage groove 7.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0027] Although various terms are used more frequently in this text, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present utility model; any interpretation of them as an additional limitation is contrary to the spirit of the present utility model.

Claims

1. A vertical multi-stage centrifugal pump connection structure, comprising a pump body (1), wherein the outer surface of the pump body (1) is provided with a drain port (2) and a water outlet (3), characterized in that: The pump body (1) is provided with a motor slot (4) and a pump slot (5), the motor slot (4) is provided with an axial hole (41) and a connecting slot (42), the drain port (2) and the water outlet (3) are connected to the pump slot (5), a guide plate (51) is installed in the pump slot (5), the pump slot (5) is provided with an axial hole (52), the pump body (1) is surrounded by a reinforcing rib (6), and a connecting ledge (61) is provided on the reinforcing rib (6).

2. A vertical multistage centrifugal pump connection structure according to claim 1, characterized in that: The guide plate (51) is arc-shaped, and the arc opening (511) of the guide plate (51) faces the water outlet (3).

3. A vertical multistage centrifugal pump connection structure according to claim 1, characterized in that: The connecting bracket (61) is provided with an arc-edged groove (611).

4. A vertical multistage centrifugal pump connection structure according to claim 1, characterized in that: A drainage groove (7) is provided next to the pump body (1).

5. A vertical multi-stage centrifugal pump connection structure according to claim 4, characterized in that: The drainage groove (7) penetrates to the first shaft hole (41) and the second shaft hole (52); a drainage hole (421) is provided at the connection groove (42); and the drainage hole (421) penetrates to the drainage groove (7).

6. A vertical multistage centrifugal pump connection structure according to claim 1, characterized in that: The shaft hole (41) is provided with a chamfer (411).

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